namespaces/index admin-guide/namespaces/index
namespaces/resource-control admin-guide/namespaces/resource-control
networking/altera_tse networking/device_drivers/ethernet/altera/altera_tse
-networking/baycom networking/device_drivers/hamradio/baycom
networking/bpf_flow_dissector bpf/prog_flow_dissector
networking/cxacru networking/device_drivers/atm/cxacru
networking/defza networking/device_drivers/fddi/defza
networking/ixgbevf networking/device_drivers/ethernet/intel/ixgbevf
networking/netdev-FAQ process/maintainer-netdev
networking/skfp networking/device_drivers/fddi/skfp
-networking/z8530drv networking/device_drivers/hamradio/z8530drv
nfc/index driver-api/nfc/index
nfc/nfc-hci driver-api/nfc/nfc-hci
nfc/nfc-pn544 driver-api/nfc/nfc-pn544
APPARMOR AppArmor support is enabled.
ARM ARM architecture is enabled.
ARM64 ARM64 architecture is enabled.
- AX25 Appropriate AX.25 support is enabled.
CLK Common clock infrastructure is enabled.
CMA Contiguous Memory Area support is enabled.
DRM Direct Rendering Management support is enabled.
1 - Enable the BAU.
unset - Disable the BAU.
- baycom_epp= [HW,AX25]
- Format: <io>,<mode>
-
- baycom_par= [HW,AX25] BayCom Parallel Port AX.25 Modem
- Format: <io>,<mode>
- See header of drivers/net/hamradio/baycom_par.c.
-
- baycom_ser_fdx= [HW,AX25]
- BayCom Serial Port AX.25 Modem (Full Duplex Mode)
- Format: <io>,<irq>,<mode>[,<baud>]
- See header of drivers/net/hamradio/baycom_ser_fdx.c.
-
- baycom_ser_hdx= [HW,AX25]
- BayCom Serial Port AX.25 Modem (Half Duplex Mode)
- Format: <io>,<irq>,<mode>
- See header of drivers/net/hamradio/baycom_ser_hdx.c.
-
bdev_allow_write_mounted=
Format: <bool>
Control the ability to open a mounted block device
+++ /dev/null
-.. SPDX-License-Identifier: GPL-2.0
-
-==============
-6pack Protocol
-==============
-
-This is the 6pack-mini-HOWTO, written by
-
-Andreas Könsgen DG3KQ
-
-:Internet: ajk@comnets.uni-bremen.de
-:AMPR-net: dg3kq@db0pra.ampr.org
-:AX.25: dg3kq@db0ach.#nrw.deu.eu
-
-Last update: April 7, 1998
-
-1. What is 6pack, and what are the advantages to KISS?
-======================================================
-
-6pack is a transmission protocol for data exchange between the PC and
-the TNC over a serial line. It can be used as an alternative to KISS.
-
-6pack has two major advantages:
-
-- The PC is given full control over the radio
- channel. Special control data is exchanged between the PC and the TNC so
- that the PC knows at any time if the TNC is receiving data, if a TNC
- buffer underrun or overrun has occurred, if the PTT is
- set and so on. This control data is processed at a higher priority than
- normal data, so a data stream can be interrupted at any time to issue an
- important event. This helps to improve the channel access and timing
- algorithms as everything is computed in the PC. It would even be possible
- to experiment with something completely different from the known CSMA and
- DAMA channel access methods.
- This kind of real-time control is especially important to supply several
- TNCs that are connected between each other and the PC by a daisy chain
- (however, this feature is not supported yet by the Linux 6pack driver).
-
-- Each packet transferred over the serial line is supplied with a checksum,
- so it is easy to detect errors due to problems on the serial line.
- Received packets that are corrupt are not passed on to the AX.25 layer.
- Damaged packets that the TNC has received from the PC are not transmitted.
-
-More details about 6pack are described in the file 6pack.ps that is located
-in the doc directory of the AX.25 utilities package.
-
-2. Who has developed the 6pack protocol?
-========================================
-
-The 6pack protocol has been developed by Ekki Plicht DF4OR, Henning Rech
-DF9IC and Gunter Jost DK7WJ. A driver for 6pack, written by Gunter Jost and
-Matthias Welwarsky DG2FEF, comes along with the PC version of FlexNet.
-They have also written a firmware for TNCs to perform the 6pack
-protocol (see section 4 below).
-
-3. Where can I get the latest version of 6pack for LinuX?
-=========================================================
-
-At the moment, the 6pack stuff can obtained via anonymous ftp from
-db0bm.automation.fh-aachen.de. In the directory /incoming/dg3kq,
-there is a file named 6pack.tgz.
-
-4. Preparing the TNC for 6pack operation
-========================================
-
-To be able to use 6pack, a special firmware for the TNC is needed. The EPROM
-of a newly bought TNC does not contain 6pack, so you will have to
-program an EPROM yourself. The image file for 6pack EPROMs should be
-available on any packet radio box where PC/FlexNet can be found. The name of
-the file is 6pack.bin. This file is copyrighted and maintained by the FlexNet
-team. It can be used under the terms of the license that comes along
-with PC/FlexNet. Please do not ask me about the internals of this file as I
-don't know anything about it. I used a textual description of the 6pack
-protocol to program the Linux driver.
-
-TNCs contain a 64kByte EPROM, the lower half of which is used for
-the firmware/KISS. The upper half is either empty or is sometimes
-programmed with software called TAPR. In the latter case, the TNC
-is supplied with a DIP switch so you can easily change between the
-two systems. When programming a new EPROM, one of the systems is replaced
-by 6pack. It is useful to replace TAPR, as this software is rarely used
-nowadays. If your TNC is not equipped with the switch mentioned above, you
-can build in one yourself that switches over the highest address pin
-of the EPROM between HIGH and LOW level. After having inserted the new EPROM
-and switched to 6pack, apply power to the TNC for a first test. The connect
-and the status LED are lit for about a second if the firmware initialises
-the TNC correctly.
-
-5. Building and installing the 6pack driver
-===========================================
-
-The driver has been tested with kernel version 2.1.90. Use with older
-kernels may lead to a compilation error because the interface to a kernel
-function has been changed in the 2.1.8x kernels.
-
-How to turn on 6pack support:
------------------------------
-
-- In the linux kernel configuration program, select the code maturity level
- options menu and turn on the prompting for development drivers.
-
-- Select the amateur radio support menu and turn on the serial port 6pack
- driver.
-
-- Compile and install the kernel and the modules.
-
-To use the driver, the kissattach program delivered with the AX.25 utilities
-has to be modified.
-
-- Do a cd to the directory that holds the kissattach sources. Edit the
- kissattach.c file. At the top, insert the following lines::
-
- #ifndef N_6PACK
- #define N_6PACK (N_AX25+1)
- #endif
-
- Then find the line:
-
- int disc = N_AX25;
-
- and replace N_AX25 by N_6PACK.
-
-- Recompile kissattach. Rename it to spattach to avoid confusions.
-
-Installing the driver:
-----------------------
-
-- Do an insmod 6pack. Look at your /var/log/messages file to check if the
- module has printed its initialization message.
-
-- Do a spattach as you would launch kissattach when starting a KISS port.
- Check if the kernel prints the message '6pack: TNC found'.
-
-- From here, everything should work as if you were setting up a KISS port.
- The only difference is that the network device that represents
- the 6pack port is called sp instead of sl or ax. So, sp0 would be the
- first 6pack port.
-
-Although the driver has been tested on various platforms, I still declare it
-ALPHA. BE CAREFUL! Sync your disks before insmoding the 6pack module
-and spattaching. Watch out if your computer behaves strangely. Read section
-6 of this file about known problems.
-
-Note that the connect and status LEDs of the TNC are controlled in a
-different way than they are when the TNC is used with PC/FlexNet. When using
-FlexNet, the connect LED is on if there is a connection; the status LED is
-on if there is data in the buffer of the PC's AX.25 engine that has to be
-transmitted. Under Linux, the 6pack layer is beyond the AX.25 layer,
-so the 6pack driver doesn't know anything about connects or data that
-has not yet been transmitted. Therefore the LEDs are controlled
-as they are in KISS mode: The connect LED is turned on if data is transferred
-from the PC to the TNC over the serial line, the status LED if data is
-sent to the PC.
-
-6. Known problems
-=================
-
-When testing the driver with 2.0.3x kernels and
-operating with data rates on the radio channel of 9600 Baud or higher,
-the driver may, on certain systems, sometimes print the message '6pack:
-bad checksum', which is due to data loss if the other station sends two
-or more subsequent packets. I have been told that this is due to a problem
-with the serial driver of 2.0.3x kernels. I don't know yet if the problem
-still exists with 2.1.x kernels, as I have heard that the serial driver
-code has been changed with 2.1.x.
-
-When shutting down the sp interface with ifconfig, the kernel crashes if
-there is still an AX.25 connection left over which an IP connection was
-running, even if that IP connection is already closed. The problem does not
-occur when there is a bare AX.25 connection still running. I don't know if
-this is a problem of the 6pack driver or something else in the kernel.
-
-The driver has been tested as a module, not yet as a kernel-builtin driver.
-
-The 6pack protocol supports daisy-chaining of TNCs in a token ring, which is
-connected to one serial port of the PC. This feature is not implemented
-and at least at the moment I won't be able to do it because I do not have
-the opportunity to build a TNC daisy-chain and test it.
-
-Some of the comments in the source code are inaccurate. They are left from
-the SLIP/KISS driver, from which the 6pack driver has been derived.
-I haven't modified or removed them yet -- sorry! The code itself needs
-some cleaning and optimizing. This will be done in a later release.
-
-If you encounter a bug or if you have a question or suggestion concerning the
-driver, feel free to mail me, using the addresses given at the beginning of
-this file.
-
-Have fun!
-
-Andreas
+++ /dev/null
-.. SPDX-License-Identifier: GPL-2.0
-
-=====
-AX.25
-=====
-
-To use the amateur radio protocols within Linux you will need to get a
-suitable copy of the AX.25 Utilities. More detailed information about
-AX.25, NET/ROM and ROSE, associated programs and utilities can be
-found on https://linux-ax25.in-berlin.de.
-
-There is a mailing list for discussing Linux amateur radio matters
-called linux-hams@vger.kernel.org. To subscribe to it, send a message to
-linux-hams+subscribe@vger.kernel.org or use the web interface at
-https://vger.kernel.org. The subject and body of the message are
-ignored. You don't need to be subscribed to post but of course that
-means you might miss an answer.
+++ /dev/null
-.. SPDX-License-Identifier: GPL-2.0
-
-===============================
-Linux Drivers for Baycom Modems
-===============================
-
-Thomas M. Sailer, HB9JNX/AE4WA, <sailer@ife.ee.ethz.ch>
-
-The drivers for the baycom modems have been split into
-separate drivers as they did not share any code, and the driver
-and device names have changed.
-
-This document describes the Linux Kernel Drivers for simple Baycom style
-amateur radio modems.
-
-The following drivers are available:
-====================================
-
-baycom_ser_fdx:
- This driver supports the SER12 modems either full or half duplex.
- Its baud rate may be changed via the ``baud`` module parameter,
- therefore it supports just about every bit bang modem on a
- serial port. Its devices are called bcsf0 through bcsf3.
- This is the recommended driver for SER12 type modems,
- however if you have a broken UART clone that does not have working
- delta status bits, you may try baycom_ser_hdx.
-
-baycom_ser_hdx:
- This is an alternative driver for SER12 type modems.
- It only supports half duplex, and only 1200 baud. Its devices
- are called bcsh0 through bcsh3. Use this driver only if baycom_ser_fdx
- does not work with your UART.
-
-baycom_par:
- This driver supports the par96 and picpar modems.
- Its devices are called bcp0 through bcp3.
-
-baycom_epp:
- This driver supports the EPP modem.
- Its devices are called bce0 through bce3.
- This driver is work-in-progress.
-
-The following modems are supported:
-
-======= ========================================================================
-ser12 This is a very simple 1200 baud AFSK modem. The modem consists only
- of a modulator/demodulator chip, usually a TI TCM3105. The computer
- is responsible for regenerating the receiver bit clock, as well as
- for handling the HDLC protocol. The modem connects to a serial port,
- hence the name. Since the serial port is not used as an async serial
- port, the kernel driver for serial ports cannot be used, and this
- driver only supports standard serial hardware (8250, 16450, 16550)
-
-par96 This is a modem for 9600 baud FSK compatible to the G3RUH standard.
- The modem does all the filtering and regenerates the receiver clock.
- Data is transferred from and to the PC via a shift register.
- The shift register is filled with 16 bits and an interrupt is signalled.
- The PC then empties the shift register in a burst. This modem connects
- to the parallel port, hence the name. The modem leaves the
- implementation of the HDLC protocol and the scrambler polynomial to
- the PC.
-
-picpar This is a redesign of the par96 modem by Henning Rech, DF9IC. The modem
- is protocol compatible to par96, but uses only three low power ICs
- and can therefore be fed from the parallel port and does not require
- an additional power supply. Furthermore, it incorporates a carrier
- detect circuitry.
-
-EPP This is a high-speed modem adaptor that connects to an enhanced parallel
- port.
-
- Its target audience is users working over a high speed hub (76.8kbit/s).
-
-eppfpga This is a redesign of the EPP adaptor.
-======= ========================================================================
-
-All of the above modems only support half duplex communications. However,
-the driver supports the KISS (see below) fullduplex command. It then simply
-starts to send as soon as there's a packet to transmit and does not care
-about DCD, i.e. it starts to send even if there's someone else on the channel.
-This command is required by some implementations of the DAMA channel
-access protocol.
-
-
-The Interface of the drivers
-============================
-
-Unlike previous drivers, these drivers are no longer character devices,
-but they are now true kernel network interfaces. Installation is therefore
-simple. Once installed, four interfaces named bc{sf,sh,p,e}[0-3] are available.
-sethdlc from the ax25 utilities may be used to set driver states etc.
-Users of userland AX.25 stacks may use the net2kiss utility (also available
-in the ax25 utilities package) to convert packets of a network interface
-to a KISS stream on a pseudo tty. There's also a patch available from
-me for WAMPES which allows attaching a kernel network interface directly.
-
-
-Configuring the driver
-======================
-
-Every time a driver is inserted into the kernel, it has to know which
-modems it should access at which ports. This can be done with the setbaycom
-utility. If you are only using one modem, you can also configure the
-driver from the insmod command line (or by means of an option line in
-``/etc/modprobe.d/*.conf``).
-
-Examples::
-
- modprobe baycom_ser_fdx mode="ser12*" iobase=0x3f8 irq=4
- sethdlc -i bcsf0 -p mode "ser12*" io 0x3f8 irq 4
-
-Both lines configure the first port to drive a ser12 modem at the first
-serial port (COM1 under DOS). The * in the mode parameter instructs the driver
-to use the software DCD algorithm (see below)::
-
- insmod baycom_par mode="picpar" iobase=0x378
- sethdlc -i bcp0 -p mode "picpar" io 0x378
-
-Both lines configure the first port to drive a picpar modem at the
-first parallel port (LPT1 under DOS). (Note: picpar implies
-hardware DCD, par96 implies software DCD).
-
-The channel access parameters can be set with sethdlc -a or kissparms.
-Note that both utilities interpret the values slightly differently.
-
-
-Hardware DCD versus Software DCD
-================================
-
-To avoid collisions on the air, the driver must know when the channel is
-busy. This is the task of the DCD circuitry/software. The driver may either
-utilise a software DCD algorithm (options=1) or use a DCD signal from
-the hardware (options=0).
-
-======= =================================================================
-ser12 if software DCD is utilised, the radio's squelch should always be
- open. It is highly recommended to use the software DCD algorithm,
- as it is much faster than most hardware squelch circuitry. The
- disadvantage is a slightly higher load on the system.
-
-par96 the software DCD algorithm for this type of modem is rather poor.
- The modem simply does not provide enough information to implement
- a reasonable DCD algorithm in software. Therefore, if your radio
- feeds the DCD input of the PAR96 modem, the use of the hardware
- DCD circuitry is recommended.
-
-picpar the picpar modem features a builtin DCD hardware, which is highly
- recommended.
-======= =================================================================
-
-
-
-Compatibility with the rest of the Linux kernel
-===============================================
-
-The serial driver and the baycom serial drivers compete
-for the same hardware resources. Of course only one driver can access a given
-interface at a time. The serial driver grabs all interfaces it can find at
-startup time. Therefore the baycom drivers subsequently won't be able to
-access a serial port. You might therefore find it necessary to release
-a port owned by the serial driver with 'setserial /dev/ttyS# uart none', where
-# is the number of the interface. The baycom drivers do not reserve any
-ports at startup, unless one is specified on the 'insmod' command line. Another
-method to solve the problem is to compile all drivers as modules and
-leave it to kmod to load the correct driver depending on the application.
-
-The parallel port drivers (baycom_par, baycom_epp) now use the parport subsystem
-to arbitrate the ports between different client drivers.
-
-vy 73s de
-
-Tom Sailer, sailer@ife.ee.ethz.ch
-
-hb9jnx @ hb9w.ampr.org
+++ /dev/null
-.. SPDX-License-Identifier: (GPL-2.0-only OR BSD-2-Clause)
-
-Amateur Radio Device Drivers
-============================
-
-Contents:
-
-.. toctree::
- :maxdepth: 2
-
- baycom
- z8530drv
+++ /dev/null
-.. SPDX-License-Identifier: GPL-2.0
-.. include:: <isonum.txt>
-
-=========================================================
-SCC.C - Linux driver for Z8530 based HDLC cards for AX.25
-=========================================================
-
-
-This is a subset of the documentation. To use this driver you MUST have the
-full package from:
-
-Internet:
-
- 1. ftp://ftp.ccac.rwth-aachen.de/pub/jr/z8530drv-utils_3.0-3.tar.gz
-
- 2. ftp://ftp.pspt.fi/pub/ham/linux/ax25/z8530drv-utils_3.0-3.tar.gz
-
-Please note that the information in this document may be hopelessly outdated.
-A new version of the documentation, along with links to other important
-Linux Kernel AX.25 documentation and programs, is available on
-http://yaina.de/jreuter
-
-Copyright |copy| 1993,2000 by Joerg Reuter DL1BKE <jreuter@yaina.de>
-
-portions Copyright |copy| 1993 Guido ten Dolle PE1NNZ
-
-for the complete copyright notice see >> Copying.Z8530DRV <<
-
-1. Initialization of the driver
-===============================
-
-To use the driver, 3 steps must be performed:
-
- 1. if compiled as module: loading the module
- 2. Setup of hardware, MODEM and KISS parameters with sccinit
- 3. Attach each channel to the Linux kernel AX.25 with "ifconfig"
-
-Unlike the versions below 2.4 this driver is a real network device
-driver. If you want to run xNOS instead of our fine kernel AX.25
-use a 2.x version (available from above sites) or read the
-AX.25-HOWTO on how to emulate a KISS TNC on network device drivers.
-
-
-1.1 Loading the module
-======================
-
-(If you're going to compile the driver as a part of the kernel image,
- skip this chapter and continue with 1.2)
-
-Before you can use a module, you'll have to load it with::
-
- insmod scc.o
-
-please read 'man insmod' that comes with module-init-tools.
-
-You should include the insmod in one of the /etc/rc.d/rc.* files,
-and don't forget to insert a call of sccinit after that. It
-will read your /etc/z8530drv.conf.
-
-1.2. /etc/z8530drv.conf
-=======================
-
-To setup all parameters you must run /sbin/sccinit from one
-of your rc.*-files. This has to be done BEFORE you can
-"ifconfig" an interface. Sccinit reads the file /etc/z8530drv.conf
-and sets the hardware, MODEM and KISS parameters. A sample file is
-delivered with this package. Change it to your needs.
-
-The file itself consists of two main sections.
-
-1.2.1 configuration of hardware parameters
-==========================================
-
-The hardware setup section defines the following parameters for each
-Z8530::
-
- chip 1
- data_a 0x300 # data port A
- ctrl_a 0x304 # control port A
- data_b 0x301 # data port B
- ctrl_b 0x305 # control port B
- irq 5 # IRQ No. 5
- pclock 4915200 # clock
- board BAYCOM # hardware type
- escc no # enhanced SCC chip? (8580/85180/85280)
- vector 0 # latch for interrupt vector
- special no # address of special function register
- option 0 # option to set via sfr
-
-
-chip
- - this is just a delimiter to make sccinit a bit simpler to
- program. A parameter has no effect.
-
-data_a
- - the address of the data port A of this Z8530 (needed)
-ctrl_a
- - the address of the control port A (needed)
-data_b
- - the address of the data port B (needed)
-ctrl_b
- - the address of the control port B (needed)
-
-irq
- - the used IRQ for this chip. Different chips can use different
- IRQs or the same. If they share an interrupt, it needs to be
- specified within one chip-definition only.
-
-pclock - the clock at the PCLK pin of the Z8530 (option, 4915200 is
- default), measured in Hertz
-
-board
- - the "type" of the board:
-
- ======================= ========
- SCC type value
- ======================= ========
- PA0HZP SCC card PA0HZP
- EAGLE card EAGLE
- PC100 card PC100
- PRIMUS-PC (DG9BL) card PRIMUS
- BayCom (U)SCC card BAYCOM
- ======================= ========
-
-escc
- - if you want support for ESCC chips (8580, 85180, 85280), set
- this to "yes" (option, defaults to "no")
-
-vector
- - address of the vector latch (aka "intack port") for PA0HZP
- cards. There can be only one vector latch for all chips!
- (option, defaults to 0)
-
-special
- - address of the special function register on several cards.
- (option, defaults to 0)
-
-option - The value you write into that register (option, default is 0)
-
-You can specify up to four chips (8 channels). If this is not enough,
-just change::
-
- #define MAXSCC 4
-
-to a higher value.
-
-Example for the BAYCOM USCC:
-----------------------------
-
-::
-
- chip 1
- data_a 0x300 # data port A
- ctrl_a 0x304 # control port A
- data_b 0x301 # data port B
- ctrl_b 0x305 # control port B
- irq 5 # IRQ No. 5 (#)
- board BAYCOM # hardware type (*)
- #
- # SCC chip 2
- #
- chip 2
- data_a 0x302
- ctrl_a 0x306
- data_b 0x303
- ctrl_b 0x307
- board BAYCOM
-
-An example for a PA0HZP card:
------------------------------
-
-::
-
- chip 1
- data_a 0x153
- data_b 0x151
- ctrl_a 0x152
- ctrl_b 0x150
- irq 9
- pclock 4915200
- board PA0HZP
- vector 0x168
- escc no
- #
- #
- #
- chip 2
- data_a 0x157
- data_b 0x155
- ctrl_a 0x156
- ctrl_b 0x154
- irq 9
- pclock 4915200
- board PA0HZP
- vector 0x168
- escc no
-
-A DRSI would should probably work with this:
---------------------------------------------
-(actually: two DRSI cards...)
-
-::
-
- chip 1
- data_a 0x303
- data_b 0x301
- ctrl_a 0x302
- ctrl_b 0x300
- irq 7
- pclock 4915200
- board DRSI
- escc no
- #
- #
- #
- chip 2
- data_a 0x313
- data_b 0x311
- ctrl_a 0x312
- ctrl_b 0x310
- irq 7
- pclock 4915200
- board DRSI
- escc no
-
-Note that you cannot use the on-board baudrate generator off DRSI
-cards. Use "mode dpll" for clock source (see below).
-
-This is based on information provided by Mike Bilow (and verified
-by Paul Helay)
-
-The utility "gencfg"
---------------------
-
-If you only know the parameters for the PE1CHL driver for DOS,
-run gencfg. It will generate the correct port addresses (I hope).
-Its parameters are exactly the same as the ones you use with
-the "attach scc" command in net, except that the string "init" must
-not appear. Example::
-
- gencfg 2 0x150 4 2 0 1 0x168 9 4915200
-
-will print a skeleton z8530drv.conf for the OptoSCC to stdout.
-
-::
-
- gencfg 2 0x300 2 4 5 -4 0 7 4915200 0x10
-
-does the same for the BAYCOM USCC card. In my opinion it is much easier
-to edit scc_config.h...
-
-
-1.2.2 channel configuration
-===========================
-
-The channel definition is divided into three sub sections for each
-channel:
-
-An example for scc0::
-
- # DEVICE
-
- device scc0 # the device for the following params
-
- # MODEM / BUFFERS
-
- speed 1200 # the default baudrate
- clock dpll # clock source:
- # dpll = normal half duplex operation
- # external = MODEM provides own Rx/Tx clock
- # divider = use full duplex divider if
- # installed (1)
- mode nrzi # HDLC encoding mode
- # nrzi = 1k2 MODEM, G3RUH 9k6 MODEM
- # nrz = DF9IC 9k6 MODEM
- #
- bufsize 384 # size of buffers. Note that this must include
- # the AX.25 header, not only the data field!
- # (optional, defaults to 384)
-
- # KISS (Layer 1)
-
- txdelay 36 # (see chapter 1.4)
- persist 64
- slot 8
- tail 8
- fulldup 0
- wait 12
- min 3
- maxkey 7
- idle 3
- maxdef 120
- group 0
- txoff off
- softdcd on
- slip off
-
-The order WITHIN these sections is unimportant. The order OF these
-sections IS important. The MODEM parameters are set with the first
-recognized KISS parameter...
-
-Please note that you can initialize the board only once after boot
-(or insmod). You can change all parameters but "mode" and "clock"
-later with the Sccparam program or through KISS. Just to avoid
-security holes...
-
-(1) this divider is usually mounted on the SCC-PBC (PA0HZP) or not
- present at all (BayCom). It feeds back the output of the DPLL
- (digital pll) as transmit clock. Using this mode without a divider
- installed will normally result in keying the transceiver until
- maxkey expires --- of course without sending anything (useful).
-
-2. Attachment of a channel by your AX.25 software
-=================================================
-
-2.1 Kernel AX.25
-================
-
-To set up an AX.25 device you can simply type::
-
- ifconfig scc0 44.128.1.1 hw ax25 dl0tha-7
-
-This will create a network interface with the IP number 44.128.20.107
-and the callsign "dl0tha". If you do not have any IP number (yet) you
-can use any of the 44.128.0.0 network. Note that you do not need
-axattach. The purpose of axattach (like slattach) is to create a KISS
-network device linked to a TTY. Please read the documentation of the
-ax25-utils and the AX.25-HOWTO to learn how to set the parameters of
-the kernel AX.25.
-
-2.2 NOS, NET and TFKISS
-=======================
-
-Since the TTY driver (aka KISS TNC emulation) is gone you need
-to emulate the old behaviour. The cost of using these programs is
-that you probably need to compile the kernel AX.25, regardless of whether
-you actually use it or not. First setup your /etc/ax25/axports,
-for example::
-
- 9k6 dl0tha-9 9600 255 4 9600 baud port (scc3)
- axlink dl0tha-15 38400 255 4 Link to NOS
-
-Now "ifconfig" the scc device::
-
- ifconfig scc3 44.128.1.1 hw ax25 dl0tha-9
-
-You can now axattach a pseudo-TTY::
-
- axattach /dev/ptys0 axlink
-
-and start your NOS and attach /dev/ptys0 there. The problem is that
-NOS is reachable only via digipeating through the kernel AX.25
-(disastrous on a DAMA controlled channel). To solve this problem,
-configure "rxecho" to echo the incoming frames from "9k6" to "axlink"
-and outgoing frames from "axlink" to "9k6" and start::
-
- rxecho
-
-Or simply use "kissbridge" coming with z8530drv-utils::
-
- ifconfig scc3 hw ax25 dl0tha-9
- kissbridge scc3 /dev/ptys0
-
-
-3. Adjustment and Display of parameters
-=======================================
-
-3.1 Displaying SCC Parameters:
-==============================
-
-Once a SCC channel has been attached, the parameter settings and
-some statistic information can be shown using the param program::
-
- dl1bke-u:~$ sccstat scc0
-
- Parameters:
-
- speed : 1200 baud
- txdelay : 36
- persist : 255
- slottime : 0
- txtail : 8
- fulldup : 1
- waittime : 12
- mintime : 3 sec
- maxkeyup : 7 sec
- idletime : 3 sec
- maxdefer : 120 sec
- group : 0x00
- txoff : off
- softdcd : on
- SLIP : off
-
- Status:
-
- HDLC Z8530 Interrupts Buffers
- -----------------------------------------------------------------------
- Sent : 273 RxOver : 0 RxInts : 125074 Size : 384
- Received : 1095 TxUnder: 0 TxInts : 4684 NoSpace : 0
- RxErrors : 1591 ExInts : 11776
- TxErrors : 0 SpInts : 1503
- Tx State : idle
-
-
-The status info shown is:
-
-============== ==============================================================
-Sent number of frames transmitted
-Received number of frames received
-RxErrors number of receive errors (CRC, ABORT)
-TxErrors number of discarded Tx frames (due to various reasons)
-Tx State status of the Tx interrupt handler: idle/busy/active/tail (2)
-RxOver number of receiver overruns
-TxUnder number of transmitter underruns
-RxInts number of receiver interrupts
-TxInts number of transmitter interrupts
-EpInts number of receiver special condition interrupts
-SpInts number of external/status interrupts
-Size maximum size of an AX.25 frame (*with* AX.25 headers!)
-NoSpace number of times a buffer could not get allocated
-============== ==============================================================
-
-An overrun is abnormal. If lots of these occur, the product of
-baudrate and number of interfaces is too high for the processing
-power of your computer. NoSpace errors are unlikely to be caused by the
-driver or the kernel AX.25.
-
-
-3.2 Setting Parameters
-======================
-
-
-The setting of parameters of the emulated KISS TNC is done in the
-same way in the SCC driver. You can change parameters by using
-the kissparms program from the ax25-utils package or use the program
-"sccparam"::
-
- sccparam <device> <paramname> <decimal-|hexadecimal value>
-
-You can change the following parameters:
-
-=========== =====
-param value
-=========== =====
-speed 1200
-txdelay 36
-persist 255
-slottime 0
-txtail 8
-fulldup 1
-waittime 12
-mintime 3
-maxkeyup 7
-idletime 3
-maxdefer 120
-group 0x00
-txoff off
-softdcd on
-SLIP off
-=========== =====
-
-
-The parameters have the following meaning:
-
-speed:
- The baudrate on this channel in bits/sec
-
- Example: sccparam /dev/scc3 speed 9600
-
-txdelay:
- The delay (in units of 10 ms) after keying of the
- transmitter, until the first byte is sent. This is usually
- called "TXDELAY" in a TNC. When 0 is specified, the driver
- will just wait until the CTS signal is asserted. This
- assumes the presence of a timer or other circuitry in the
- MODEM and/or transmitter, that asserts CTS when the
- transmitter is ready for data.
- A normal value of this parameter is 30-36.
-
- Example: sccparam /dev/scc0 txd 20
-
-persist:
- This is the probability that the transmitter will be keyed
- when the channel is found to be free. It is a value from 0
- to 255, and the probability is (value+1)/256. The value
- should be somewhere near 50-60, and should be lowered when
- the channel is used more heavily.
-
- Example: sccparam /dev/scc2 persist 20
-
-slottime:
- This is the time between samples of the channel. It is
- expressed in units of 10 ms. About 200-300 ms (value 20-30)
- seems to be a good value.
-
- Example: sccparam /dev/scc0 slot 20
-
-tail:
- The time the transmitter will remain keyed after the last
- byte of a packet has been transferred to the SCC. This is
- necessary because the CRC and a flag still have to leave the
- SCC before the transmitter is keyed down. The value depends
- on the baudrate selected. A few character times should be
- sufficient, e.g. 40ms at 1200 baud. (value 4)
- The value of this parameter is in 10 ms units.
-
- Example: sccparam /dev/scc2 4
-
-full:
- The full-duplex mode switch. This can be one of the following
- values:
-
- 0: The interface will operate in CSMA mode (the normal
- half-duplex packet radio operation)
- 1: Fullduplex mode, i.e. the transmitter will be keyed at
- any time, without checking the received carrier. It
- will be unkeyed when there are no packets to be sent.
- 2: Like 1, but the transmitter will remain keyed, also
- when there are no packets to be sent. Flags will be
- sent in that case, until a timeout (parameter 10)
- occurs.
-
- Example: sccparam /dev/scc0 fulldup off
-
-wait:
- The initial waittime before any transmit attempt, after the
- frame has been queue for transmit. This is the length of
- the first slot in CSMA mode. In full duplex modes it is
- set to 0 for maximum performance.
- The value of this parameter is in 10 ms units.
-
- Example: sccparam /dev/scc1 wait 4
-
-maxkey:
- The maximal time the transmitter will be keyed to send
- packets, in seconds. This can be useful on busy CSMA
- channels, to avoid "getting a bad reputation" when you are
- generating a lot of traffic. After the specified time has
- elapsed, no new frame will be started. Instead, the trans-
- mitter will be switched off for a specified time (parameter
- min), and then the selected algorithm for keyup will be
- started again.
- The value 0 as well as "off" will disable this feature,
- and allow infinite transmission time.
-
- Example: sccparam /dev/scc0 maxk 20
-
-min:
- This is the time the transmitter will be switched off when
- the maximum transmission time is exceeded.
-
- Example: sccparam /dev/scc3 min 10
-
-idle:
- This parameter specifies the maximum idle time in full duplex
- 2 mode, in seconds. When no frames have been sent for this
- time, the transmitter will be keyed down. A value of 0 is
- has same result as the fullduplex mode 1. This parameter
- can be disabled.
-
- Example: sccparam /dev/scc2 idle off # transmit forever
-
-maxdefer
- This is the maximum time (in seconds) to wait for a free channel
- to send. When this timer expires the transmitter will be keyed
- IMMEDIATELY. If you love to get trouble with other users you
- should set this to a very low value ;-)
-
- Example: sccparam /dev/scc0 maxdefer 240 # 2 minutes
-
-
-txoff:
- When this parameter has the value 0, the transmission of packets
- is enable. Otherwise it is disabled.
-
- Example: sccparam /dev/scc2 txoff on
-
-group:
- It is possible to build special radio equipment to use more than
- one frequency on the same band, e.g. using several receivers and
- only one transmitter that can be switched between frequencies.
- Also, you can connect several radios that are active on the same
- band. In these cases, it is not possible, or not a good idea, to
- transmit on more than one frequency. The SCC driver provides a
- method to lock transmitters on different interfaces, using the
- "param <interface> group <x>" command. This will only work when
- you are using CSMA mode (parameter full = 0).
-
- The number <x> must be 0 if you want no group restrictions, and
- can be computed as follows to create restricted groups:
- <x> is the sum of some OCTAL numbers:
-
-
- === =======================================================
- 200 This transmitter will only be keyed when all other
- transmitters in the group are off.
- 100 This transmitter will only be keyed when the carrier
- detect of all other interfaces in the group is off.
- 0xx A byte that can be used to define different groups.
- Interfaces are in the same group, when the logical AND
- between their xx values is nonzero.
- === =======================================================
-
- Examples:
-
- When 2 interfaces use group 201, their transmitters will never be
- keyed at the same time.
-
- When 2 interfaces use group 101, the transmitters will only key
- when both channels are clear at the same time. When group 301,
- the transmitters will not be keyed at the same time.
-
- Don't forget to convert the octal numbers into decimal before
- you set the parameter.
-
- Example: (to be written)
-
-softdcd:
- use a software dcd instead of the real one... Useful for a very
- slow squelch.
-
- Example: sccparam /dev/scc0 soft on
-
-
-4. Problems
-===========
-
-If you have tx-problems with your BayCom USCC card please check
-the manufacturer of the 8530. SGS chips have a slightly
-different timing. Try Zilog... A solution is to write to register 8
-instead to the data port, but this won't work with the ESCC chips.
-*SIGH!*
-
-A very common problem is that the PTT locks until the maxkeyup timer
-expires, although interrupts and clock source are correct. In most
-cases compiling the driver with CONFIG_SCC_DELAY (set with
-make config) solves the problems. For more hints read the (pseudo) FAQ
-and the documentation coming with z8530drv-utils.
-
-I got reports that the driver has problems on some 386-based systems.
-(i.e. Amstrad) Those systems have a bogus AT bus timing which will
-lead to delayed answers on interrupts. You can recognize these
-problems by looking at the output of Sccstat for the suspected
-port. If it shows under- and overruns you own such a system.
-
-Delayed processing of received data: This depends on
-
-- the kernel version
-
-- kernel profiling compiled or not
-
-- a high interrupt load
-
-- a high load of the machine --- running X, Xmorph, XV and Povray,
- while compiling the kernel... hmm ... even with 32 MB RAM ... ;-)
- Or running a named for the whole .ampr.org domain on an 8 MB
- box...
-
-- using information from rxecho or kissbridge.
-
-Kernel panics: please read /linux/README and find out if it
-really occurred within the scc driver.
-
-If you cannot solve a problem, send me
-
-- a description of the problem,
-- information on your hardware (computer system, scc board, modem)
-- your kernel version
-- the output of cat /proc/net/z8530
-
-4. Thor RLC100
-==============
-
-Mysteriously this board seems not to work with the driver. Anyone
-got it up-and-running?
-
-
-Many thanks to Linus Torvalds and Alan Cox for including the driver
-in the Linux standard distribution and their support.
-
-::
-
- Joerg Reuter ampr-net: dl1bke@db0pra.ampr.org
- AX-25 : DL1BKE @ DB0ABH.#BAY.DEU.EU
- Internet: jreuter@yaina.de
- WWW : http://yaina.de/jreuter
cellular/index
ethernet/index
fddi/index
- hamradio/index
wifi/index
wwan/index
tls-handshake
nfc
6lowpan
- 6pack
arcnet-hardware
arcnet
atm
- ax25
bonding
cdc_mbim
dctcp
APM_BIOS_MAGIC 0x4101 apm_user ``arch/x86/kernel/apm_32.c``
FASYNC_MAGIC 0x4601 fasync_struct ``include/linux/fs.h``
SLIP_MAGIC 0x5302 slip ``drivers/net/slip/slip.h``
-BAYCOM_MAGIC 19730510 baycom_state ``drivers/net/hamradio/baycom_epp.c``
-HDLCDRV_MAGIC 0x5ac6e778 hdlcdrv_state ``include/linux/hdlcdrv.h``
KV_MAGIC 0x5f4b565f kernel_vars_s ``arch/mips/include/asm/sn/klkernvars.h``
CODA_MAGIC 0xC0DAC0DA coda_file_info ``fs/coda/coda_fs_i.h``
-YAM_MAGIC 0xF10A7654 yam_port ``drivers/net/hamradio/yam.c``
CCB_MAGIC 0xf2691ad2 ccb ``drivers/scsi/ncr53c8xx.c``
QUEUE_MAGIC_FREE 0xf7e1c9a3 queue_entry ``drivers/scsi/arm/queue.c``
QUEUE_MAGIC_USED 0xf7e1cc33 queue_entry ``drivers/scsi/arm/queue.c``
APM_BIOS_MAGIC 0x4101 apm_user ``arch/x86/kernel/apm_32.c``
FASYNC_MAGIC 0x4601 fasync_struct ``include/linux/fs.h``
SLIP_MAGIC 0x5302 slip ``drivers/net/slip.h``
-BAYCOM_MAGIC 0x19730510 baycom_state ``drivers/net/baycom_epp.c``
-HDLCDRV_MAGIC 0x5ac6e778 hdlcdrv_state ``include/linux/hdlcdrv.h``
KV_MAGIC 0x5f4b565f kernel_vars_s ``arch/mips/include/asm/sn/klkernvars.h``
CODA_MAGIC 0xC0DAC0DA coda_file_info ``fs/coda/coda_fs_i.h``
-YAM_MAGIC 0xF10A7654 yam_port ``drivers/net/hamradio/yam.c``
CCB_MAGIC 0xf2691ad2 ccb ``drivers/scsi/ncr53c8xx.c``
QUEUE_MAGIC_FREE 0xf7e1c9a3 queue_entry ``drivers/scsi/arm/queue.c``
QUEUE_MAGIC_USED 0xf7e1cc33 queue_entry ``drivers/scsi/arm/queue.c``
APM_BIOS_MAGIC 0x4101 apm_user ``arch/x86/kernel/apm_32.c``
FASYNC_MAGIC 0x4601 fasync_struct ``include/linux/fs.h``
SLIP_MAGIC 0x5302 slip ``drivers/net/slip.h``
-BAYCOM_MAGIC 0x19730510 baycom_state ``drivers/net/baycom_epp.c``
-HDLCDRV_MAGIC 0x5ac6e778 hdlcdrv_state ``include/linux/hdlcdrv.h``
KV_MAGIC 0x5f4b565f kernel_vars_s ``arch/mips/include/asm/sn/klkernvars.h``
CODA_MAGIC 0xC0DAC0DA coda_file_info ``fs/coda/coda_fs_i.h``
-YAM_MAGIC 0xF10A7654 yam_port ``drivers/net/hamradio/yam.c``
CCB_MAGIC 0xf2691ad2 ccb ``drivers/scsi/ncr53c8xx.c``
QUEUE_MAGIC_FREE 0xf7e1c9a3 queue_entry ``drivers/scsi/arm/queue.c``
QUEUE_MAGIC_USED 0xf7e1cc33 queue_entry ``drivers/scsi/arm/queue.c``
APM_BIOS_MAGIC 0x4101 apm_user ``arch/x86/kernel/apm_32.c``
FASYNC_MAGIC 0x4601 fasync_struct ``include/linux/fs.h``
SLIP_MAGIC 0x5302 slip ``drivers/net/slip.h``
-BAYCOM_MAGIC 0x19730510 baycom_state ``drivers/net/baycom_epp.c``
-HDLCDRV_MAGIC 0x5ac6e778 hdlcdrv_state ``include/linux/hdlcdrv.h``
KV_MAGIC 0x5f4b565f kernel_vars_s ``arch/mips/include/asm/sn/klkernvars.h``
CODA_MAGIC 0xC0DAC0DA coda_file_info ``fs/coda/coda_fs_i.h``
-YAM_MAGIC 0xF10A7654 yam_port ``drivers/net/hamradio/yam.c``
CCB_MAGIC 0xf2691ad2 ccb ``drivers/scsi/ncr53c8xx.c``
QUEUE_MAGIC_FREE 0xf7e1c9a3 queue_entry ``drivers/scsi/arm/queue.c``
QUEUE_MAGIC_USED 0xf7e1cc33 queue_entry ``drivers/scsi/arm/queue.c``
APM_BIOS_MAGIC 0x4101 apm_user ``arch/x86/kernel/apm_32.c``
FASYNC_MAGIC 0x4601 fasync_struct ``include/linux/fs.h``
SLIP_MAGIC 0x5302 slip ``drivers/net/slip.h``
-BAYCOM_MAGIC 0x19730510 baycom_state ``drivers/net/baycom_epp.c``
-HDLCDRV_MAGIC 0x5ac6e778 hdlcdrv_state ``include/linux/hdlcdrv.h``
KV_MAGIC 0x5f4b565f kernel_vars_s ``arch/mips/include/asm/sn/klkernvars.h``
CODA_MAGIC 0xC0DAC0DA coda_file_info ``fs/coda/coda_fs_i.h``
-YAM_MAGIC 0xF10A7654 yam_port ``drivers/net/hamradio/yam.c``
CCB_MAGIC 0xf2691ad2 ccb ``drivers/scsi/ncr53c8xx.c``
QUEUE_MAGIC_FREE 0xf7e1c9a3 queue_entry ``drivers/scsi/arm/queue.c``
QUEUE_MAGIC_USED 0xf7e1cc33 queue_entry ``drivers/scsi/arm/queue.c``
F: include/net/6lowpan.h
F: net/6lowpan/
-6PACK NETWORK DRIVER FOR AX.25
-M: Andreas Koensgen <ajk@comnets.uni-bremen.de>
-L: linux-hams@vger.kernel.org
-S: Maintained
-F: drivers/net/hamradio/6pack.c
-
802.11 (including CFG80211/NL80211)
M: Johannes Berg <johannes@sipsolutions.net>
L: linux-wireless@vger.kernel.org
F: Documentation/devicetree/bindings/leds/backlight/awinic,aw99706.yaml
F: drivers/video/backlight/aw99706.c
-AX.25 NETWORK LAYER
-L: linux-hams@vger.kernel.org
-S: Orphan
-W: https://linux-ax25.in-berlin.de
-F: include/net/ax25.h
-F: include/uapi/linux/ax25.h
-F: net/ax25/
-
AXENTIA ARM DEVICES
M: Peter Rosin <peda@axentia.se>
L: linux-arm-kernel@lists.infradead.org (moderated for non-subscribers)
F: include/uapi/linux/batman_adv.h
F: net/batman-adv/
-BAYCOM/HDLCDRV DRIVERS FOR AX.25
-M: Thomas Sailer <t.sailer@alumni.ethz.ch>
-L: linux-hams@vger.kernel.org
-S: Maintained
-W: http://www.baycom.org/~tom/ham/ham.html
-F: drivers/net/hamradio/baycom*
-
BCACHE (BLOCK LAYER CACHE)
M: Coly Li <colyli@fnnas.com>
M: Kent Overstreet <kent.overstreet@linux.dev>
F: drivers/rtc/rtc-ds1685.c
F: include/linux/rtc/ds1685.h
-DAMA SLAVE for AX.25
-M: Joerg Reuter <jreuter@yaina.de>
-L: linux-hams@vger.kernel.org
-S: Maintained
-W: http://yaina.de/jreuter/
-W: http://www.qsl.net/dl1bke/
-F: net/ax25/af_ax25.c
-F: net/ax25/ax25_dev.c
-F: net/ax25/ax25_ds_*
-F: net/ax25/ax25_in.c
-F: net/ax25/ax25_out.c
-F: net/ax25/ax25_timer.c
-F: net/ax25/sysctl_net_ax25.c
-
DASHARO ACPI PLATFORM DRIVER
M: Michał Kopeć <michal.kopec@3mdeb.com>
S: Maintained
F: rust/kernel/time.rs
F: rust/kernel/time/
-HIGH-SPEED SCC DRIVER FOR AX.25
-L: linux-hams@vger.kernel.org
-S: Orphan
-F: drivers/net/hamradio/scc.c
-
HIGHPOINT ROCKETRAID 3xxx RAID DRIVER
M: HighPoint Linux Team <linux@highpoint-tech.com>
S: Supported
F: net/netfilter/
F: tools/testing/selftests/net/netfilter/
-NETROM NETWORK LAYER
-L: linux-hams@vger.kernel.org
-S: Orphan
-W: https://linux-ax25.in-berlin.de
-F: include/net/netrom.h
-F: include/uapi/linux/netrom.h
-F: net/netrom/
-
NETRONIX EMBEDDED CONTROLLER
M: Jonathan Neuschäfer <j.neuschaefer@gmx.net>
S: Maintained
F: include/linux/mfd/rohm-generic.h
F: include/linux/mfd/rohm-shared.h
-ROSE NETWORK LAYER
-L: linux-hams@vger.kernel.org
-S: Orphan
-W: https://linux-ax25.in-berlin.de
-F: include/net/rose.h
-F: include/uapi/linux/rose.h
-F: net/rose/
-
ROTATION DRIVER FOR ALLWINNER A83T
M: Jernej Skrabec <jernej.skrabec@gmail.com>
L: linux-media@vger.kernel.org
F: lib/xz/
F: scripts/xz_wrap.sh
-YAM DRIVER FOR AX.25
-M: Jean-Paul Roubelat <jpr@f6fbb.org>
-L: linux-hams@vger.kernel.org
-S: Maintained
-F: drivers/net/hamradio/yam*
-F: include/linux/yam.h
-
YAMA SECURITY MODULE
M: Kees Cook <kees@kernel.org>
S: Supported
F: Documentation/input/devices/yealink.rst
F: drivers/input/misc/yealink.*
-Z8530 DRIVER FOR AX.25
-M: Joerg Reuter <jreuter@yaina.de>
-L: linux-hams@vger.kernel.org
-S: Maintained
-W: http://yaina.de/jreuter/
-W: http://www.qsl.net/dl1bke/
-F: Documentation/networking/device_drivers/hamradio/z8530drv.rst
-F: drivers/net/hamradio/*scc.c
-F: drivers/net/hamradio/z8530.h
-
ZD1211RW WIRELESS DRIVER
L: linux-wireless@vger.kernel.org
S: Orphan
CONFIG_VLAN_8021Q=y
CONFIG_NET_SCHED=y
CONFIG_NET_SCH_FQ_CODEL=y
-CONFIG_HAMRADIO=y
CONFIG_CFG80211=y
CONFIG_MAC80211=y
CONFIG_MTD=y
CONFIG_BRIDGE=m
CONFIG_VLAN_8021Q=m
CONFIG_VLAN_8021Q_GVRP=y
-CONFIG_HAMRADIO=y
-CONFIG_AX25=m
-CONFIG_NETROM=m
-CONFIG_ROSE=m
-CONFIG_MKISS=m
-CONFIG_6PACK=m
-CONFIG_BPQETHER=m
-CONFIG_BAYCOM_SER_FDX=m
-CONFIG_BAYCOM_SER_HDX=m
-CONFIG_YAM=m
CONFIG_FW_LOADER=m
CONFIG_BLK_DEV_LOOP=m
CONFIG_BLK_DEV_NBD=m
CONFIG_NET_CLS_ACT=y
CONFIG_NET_ACT_POLICE=y
CONFIG_NET_PKTGEN=m
-CONFIG_HAMRADIO=y
-CONFIG_AX25=m
-# CONFIG_AX25_DAMA_SLAVE is not set
-CONFIG_NETROM=m
-CONFIG_ROSE=m
-CONFIG_MKISS=m
-CONFIG_6PACK=m
-CONFIG_BPQETHER=m
-CONFIG_BAYCOM_SER_FDX=m
-CONFIG_BAYCOM_SER_HDX=m
-CONFIG_YAM=m
CONFIG_CFG80211=y
CONFIG_MAC80211=y
CONFIG_MTD=y
CONFIG_NET_CLS_ACT=y
CONFIG_NET_ACT_POLICE=y
CONFIG_NET_PKTGEN=m
-CONFIG_HAMRADIO=y
-CONFIG_AX25=m
-# CONFIG_AX25_DAMA_SLAVE is not set
-CONFIG_NETROM=m
-CONFIG_ROSE=m
-CONFIG_MKISS=m
-CONFIG_6PACK=m
-CONFIG_BPQETHER=m
-CONFIG_BAYCOM_SER_FDX=m
-CONFIG_BAYCOM_SER_HDX=m
-CONFIG_YAM=m
CONFIG_BT=m
CONFIG_BT_RFCOMM=m
CONFIG_BT_RFCOMM_TTY=y
CONFIG_GACT_PROB=y
CONFIG_NET_ACT_MIRRED=m
CONFIG_NET_ACT_PEDIT=m
-CONFIG_HAMRADIO=y
CONFIG_MTD=y
CONFIG_MTD_BLOCK=y
CONFIG_MTD_BLOCK2MTD=y
CONFIG_NET_CLS_U32=m
CONFIG_NET_CLS_RSVP=m
CONFIG_NET_CLS_RSVP6=m
-CONFIG_HAMRADIO=y
-CONFIG_AX25=m
-CONFIG_NETROM=m
-CONFIG_ROSE=m
-CONFIG_MKISS=m
-CONFIG_6PACK=m
-CONFIG_BPQETHER=m
CONFIG_CONNECTOR=m
CONFIG_PARPORT=m
CONFIG_PARPORT_PC=m
# CONFIG_BRIDGE_IGMP_SNOOPING is not set
CONFIG_VLAN_8021Q=y
CONFIG_NET_SCHED=y
-CONFIG_HAMRADIO=y
CONFIG_MTD=y
CONFIG_MTD_CMDLINE_PARTS=y
CONFIG_MTD_BLOCK=y
# CONFIG_BRIDGE_IGMP_SNOOPING is not set
CONFIG_VLAN_8021Q=y
CONFIG_NET_SCHED=y
-CONFIG_HAMRADIO=y
CONFIG_MTD=y
CONFIG_MTD_CMDLINE_PARTS=y
CONFIG_MTD_BLOCK=y
endif
obj-$(CONFIG_ETHERNET) += ethernet/
obj-$(CONFIG_FDDI) += fddi/
-obj-$(CONFIG_HAMRADIO) += hamradio/
obj-$(CONFIG_QCOM_IPA) += ipa/
obj-$(CONFIG_PLIP) += plip/
obj-$(CONFIG_PPP) += ppp/
+++ /dev/null
-// SPDX-License-Identifier: GPL-2.0-only
-/*
- * 6pack.c This module implements the 6pack protocol for kernel-based
- * devices like TTY. It interfaces between a raw TTY and the
- * kernel's AX.25 protocol layers.
- *
- * Authors: Andreas Könsgen <ajk@comnets.uni-bremen.de>
- * Ralf Baechle DL5RB <ralf@linux-mips.org>
- *
- * Quite a lot of stuff "stolen" by Joerg Reuter from slip.c, written by
- *
- * Laurence Culhane, <loz@holmes.demon.co.uk>
- * Fred N. van Kempen, <waltje@uwalt.nl.mugnet.org>
- */
-
-#include <linux/module.h>
-#include <linux/uaccess.h>
-#include <linux/bitops.h>
-#include <linux/string.h>
-#include <linux/mm.h>
-#include <linux/interrupt.h>
-#include <linux/in.h>
-#include <linux/tty.h>
-#include <linux/errno.h>
-#include <linux/netdevice.h>
-#include <linux/timer.h>
-#include <linux/slab.h>
-#include <net/ax25.h>
-#include <linux/etherdevice.h>
-#include <linux/skbuff.h>
-#include <linux/rtnetlink.h>
-#include <linux/spinlock.h>
-#include <linux/if_arp.h>
-#include <linux/init.h>
-#include <linux/ip.h>
-#include <linux/tcp.h>
-#include <linux/semaphore.h>
-#include <linux/refcount.h>
-
-/* sixpack priority commands */
-#define SIXP_SEOF 0x40 /* start and end of a 6pack frame */
-#define SIXP_TX_URUN 0x48 /* transmit overrun */
-#define SIXP_RX_ORUN 0x50 /* receive overrun */
-#define SIXP_RX_BUF_OVL 0x58 /* receive buffer overflow */
-
-#define SIXP_CHKSUM 0xFF /* valid checksum of a 6pack frame */
-
-/* masks to get certain bits out of the status bytes sent by the TNC */
-
-#define SIXP_CMD_MASK 0xC0
-#define SIXP_CHN_MASK 0x07
-#define SIXP_PRIO_CMD_MASK 0x80
-#define SIXP_STD_CMD_MASK 0x40
-#define SIXP_PRIO_DATA_MASK 0x38
-#define SIXP_TX_MASK 0x20
-#define SIXP_RX_MASK 0x10
-#define SIXP_RX_DCD_MASK 0x18
-#define SIXP_LEDS_ON 0x78
-#define SIXP_LEDS_OFF 0x60
-#define SIXP_CON 0x08
-#define SIXP_STA 0x10
-
-#define SIXP_FOUND_TNC 0xe9
-#define SIXP_CON_ON 0x68
-#define SIXP_DCD_MASK 0x08
-#define SIXP_DAMA_OFF 0
-
-/* default level 2 parameters */
-#define SIXP_TXDELAY 25 /* 250 ms */
-#define SIXP_PERSIST 50 /* in 256ths */
-#define SIXP_SLOTTIME 10 /* 100 ms */
-#define SIXP_INIT_RESYNC_TIMEOUT (3*HZ/2) /* in 1 s */
-#define SIXP_RESYNC_TIMEOUT 5*HZ /* in 1 s */
-
-/* 6pack configuration. */
-#define SIXP_NRUNIT 31 /* MAX number of 6pack channels */
-#define SIXP_MTU 256 /* Default MTU */
-
-enum sixpack_flags {
- SIXPF_ERROR, /* Parity, etc. error */
-};
-
-struct sixpack {
- /* Various fields. */
- struct tty_struct *tty; /* ptr to TTY structure */
- struct net_device *dev; /* easy for intr handling */
-
- /* These are pointers to the malloc()ed frame buffers. */
- int rcount; /* received chars counter */
- unsigned char *xbuff; /* transmitter buffer */
- unsigned char *xhead; /* next byte to XMIT */
- int xleft; /* bytes left in XMIT queue */
-
- u8 raw_buf[4];
- u8 cooked_buf[400];
-
- unsigned int rx_count;
- unsigned int rx_count_cooked;
- spinlock_t rxlock;
-
- unsigned long flags; /* Flag values/ mode etc */
- unsigned char mode; /* 6pack mode */
-
- /* 6pack stuff */
- unsigned char tx_delay;
- unsigned char persistence;
- unsigned char slottime;
- unsigned char duplex;
- unsigned char led_state;
- u8 status;
- u8 status1;
- unsigned char status2;
- unsigned char tx_enable;
- unsigned char tnc_state;
-
- struct timer_list tx_t;
- struct timer_list resync_t;
- spinlock_t lock;
-};
-
-#define AX25_6PACK_HEADER_LEN 0
-
-static void sixpack_decode(struct sixpack *, const u8 *, size_t);
-static int encode_sixpack(unsigned char *, unsigned char *, int, unsigned char);
-
-/*
- * Perform the persistence/slottime algorithm for CSMA access. If the
- * persistence check was successful, write the data to the serial driver.
- * Note that in case of DAMA operation, the data is not sent here.
- */
-
-static void sp_xmit_on_air(struct timer_list *t)
-{
- struct sixpack *sp = timer_container_of(sp, t, tx_t);
- int actual, when = sp->slottime;
- static unsigned char random;
-
- random = random * 17 + 41;
-
- if (((sp->status1 & SIXP_DCD_MASK) == 0) && (random < sp->persistence)) {
- sp->led_state = 0x70;
- sp->tty->ops->write(sp->tty, &sp->led_state, 1);
- sp->tx_enable = 1;
- actual = sp->tty->ops->write(sp->tty, sp->xbuff, sp->status2);
- sp->xleft -= actual;
- sp->xhead += actual;
- sp->led_state = 0x60;
- sp->tty->ops->write(sp->tty, &sp->led_state, 1);
- sp->status2 = 0;
- } else
- mod_timer(&sp->tx_t, jiffies + ((when + 1) * HZ) / 100);
-}
-
-/* ----> 6pack timer interrupt handler and friends. <---- */
-
-/* Encapsulate one AX.25 frame and stuff into a TTY queue. */
-static void sp_encaps(struct sixpack *sp, unsigned char *icp, int len)
-{
- unsigned char *msg, *p = icp;
- int actual, count;
-
- if (len > AX25_MTU + 73) {
- msg = "oversized transmit packet!";
- goto out_drop;
- }
-
- if (p[0] > 5) {
- msg = "invalid KISS command";
- goto out_drop;
- }
-
- if ((p[0] != 0) && (len > 2)) {
- msg = "KISS control packet too long";
- goto out_drop;
- }
-
- if ((p[0] == 0) && (len < 15)) {
- msg = "bad AX.25 packet to transmit";
- goto out_drop;
- }
-
- count = encode_sixpack(p, sp->xbuff, len, sp->tx_delay);
- set_bit(TTY_DO_WRITE_WAKEUP, &sp->tty->flags);
-
- switch (p[0]) {
- case 1: sp->tx_delay = p[1];
- return;
- case 2: sp->persistence = p[1];
- return;
- case 3: sp->slottime = p[1];
- return;
- case 4: /* ignored */
- return;
- case 5: sp->duplex = p[1];
- return;
- }
-
- if (p[0] != 0)
- return;
-
- /*
- * In case of fullduplex or DAMA operation, we don't take care about the
- * state of the DCD or of any timers, as the determination of the
- * correct time to send is the job of the AX.25 layer. We send
- * immediately after data has arrived.
- */
- if (sp->duplex == 1) {
- sp->led_state = 0x70;
- sp->tty->ops->write(sp->tty, &sp->led_state, 1);
- sp->tx_enable = 1;
- actual = sp->tty->ops->write(sp->tty, sp->xbuff, count);
- sp->xleft = count - actual;
- sp->xhead = sp->xbuff + actual;
- sp->led_state = 0x60;
- sp->tty->ops->write(sp->tty, &sp->led_state, 1);
- } else {
- sp->xleft = count;
- sp->xhead = sp->xbuff;
- sp->status2 = count;
- sp_xmit_on_air(&sp->tx_t);
- }
-
- return;
-
-out_drop:
- sp->dev->stats.tx_dropped++;
- netif_start_queue(sp->dev);
- if (net_ratelimit())
- printk(KERN_DEBUG "%s: %s - dropped.\n", sp->dev->name, msg);
-}
-
-/* Encapsulate an IP datagram and kick it into a TTY queue. */
-
-static netdev_tx_t sp_xmit(struct sk_buff *skb, struct net_device *dev)
-{
- struct sixpack *sp = netdev_priv(dev);
-
- if (skb->protocol == htons(ETH_P_IP))
- return ax25_ip_xmit(skb);
-
- spin_lock_bh(&sp->lock);
- /* We were not busy, so we are now... :-) */
- netif_stop_queue(dev);
- dev->stats.tx_bytes += skb->len;
- sp_encaps(sp, skb->data, skb->len);
- spin_unlock_bh(&sp->lock);
-
- dev_kfree_skb(skb);
-
- return NETDEV_TX_OK;
-}
-
-static int sp_open_dev(struct net_device *dev)
-{
- struct sixpack *sp = netdev_priv(dev);
-
- if (sp->tty == NULL)
- return -ENODEV;
- return 0;
-}
-
-/* Close the low-level part of the 6pack channel. */
-static int sp_close(struct net_device *dev)
-{
- struct sixpack *sp = netdev_priv(dev);
-
- spin_lock_bh(&sp->lock);
- if (sp->tty) {
- /* TTY discipline is running. */
- clear_bit(TTY_DO_WRITE_WAKEUP, &sp->tty->flags);
- }
- netif_stop_queue(dev);
- spin_unlock_bh(&sp->lock);
-
- return 0;
-}
-
-static int sp_set_mac_address(struct net_device *dev, void *addr)
-{
- struct sockaddr_ax25 *sa = addr;
-
- netif_tx_lock_bh(dev);
- netif_addr_lock(dev);
- __dev_addr_set(dev, &sa->sax25_call, AX25_ADDR_LEN);
- netif_addr_unlock(dev);
- netif_tx_unlock_bh(dev);
-
- return 0;
-}
-
-static const struct net_device_ops sp_netdev_ops = {
- .ndo_open = sp_open_dev,
- .ndo_stop = sp_close,
- .ndo_start_xmit = sp_xmit,
- .ndo_set_mac_address = sp_set_mac_address,
-};
-
-static void sp_setup(struct net_device *dev)
-{
- /* Finish setting up the DEVICE info. */
- dev->netdev_ops = &sp_netdev_ops;
- dev->mtu = SIXP_MTU;
- dev->hard_header_len = AX25_MAX_HEADER_LEN;
- dev->header_ops = &ax25_header_ops;
-
- dev->addr_len = AX25_ADDR_LEN;
- dev->type = ARPHRD_AX25;
- dev->tx_queue_len = 10;
-
- /* Only activated in AX.25 mode */
- memcpy(dev->broadcast, &ax25_bcast, AX25_ADDR_LEN);
- dev_addr_set(dev, (u8 *)&ax25_defaddr);
-
- dev->flags = 0;
-}
-
-/* Send one completely decapsulated IP datagram to the IP layer. */
-
-/*
- * This is the routine that sends the received data to the kernel AX.25.
- * 'cmd' is the KISS command. For AX.25 data, it is zero.
- */
-
-static void sp_bump(struct sixpack *sp, char cmd)
-{
- struct sk_buff *skb;
- int count;
- u8 *ptr;
-
- count = sp->rcount + 1;
-
- sp->dev->stats.rx_bytes += count;
-
- if ((skb = dev_alloc_skb(count + 1)) == NULL)
- goto out_mem;
-
- ptr = skb_put(skb, count + 1);
- *ptr++ = cmd; /* KISS command */
-
- memcpy(ptr, sp->cooked_buf + 1, count);
- skb->protocol = ax25_type_trans(skb, sp->dev);
- netif_rx(skb);
- sp->dev->stats.rx_packets++;
-
- return;
-
-out_mem:
- sp->dev->stats.rx_dropped++;
-}
-
-
-/* ----------------------------------------------------------------------- */
-
-/*
- * Called by the TTY driver when there's room for more data. If we have
- * more packets to send, we send them here.
- */
-static void sixpack_write_wakeup(struct tty_struct *tty)
-{
- struct sixpack *sp = tty->disc_data;
- int actual;
-
- if (!sp)
- return;
- if (sp->xleft <= 0) {
- /* Now serial buffer is almost free & we can start
- * transmission of another packet */
- sp->dev->stats.tx_packets++;
- clear_bit(TTY_DO_WRITE_WAKEUP, &tty->flags);
- sp->tx_enable = 0;
- netif_wake_queue(sp->dev);
- return;
- }
-
- if (sp->tx_enable) {
- actual = tty->ops->write(tty, sp->xhead, sp->xleft);
- sp->xleft -= actual;
- sp->xhead += actual;
- }
-}
-
-/* ----------------------------------------------------------------------- */
-
-/*
- * Handle the 'receiver data ready' interrupt.
- * This function is called by the tty module in the kernel when
- * a block of 6pack data has been received, which can now be decapsulated
- * and sent on to some IP layer for further processing.
- */
-static void sixpack_receive_buf(struct tty_struct *tty, const u8 *cp,
- const u8 *fp, size_t count)
-{
- struct sixpack *sp;
-
- if (!count)
- return;
-
- sp = tty->disc_data;
- if (!sp)
- return;
-
- /* Read the characters out of the buffer */
- while (count--) {
- if (fp && *fp++) {
- if (!test_and_set_bit(SIXPF_ERROR, &sp->flags))
- sp->dev->stats.rx_errors++;
- cp++;
- continue;
- }
- sixpack_decode(sp, cp, 1);
- cp++;
- }
-
- tty_unthrottle(tty);
-}
-
-/*
- * Try to resync the TNC. Called by the resync timer defined in
- * decode_prio_command
- */
-
-#define TNC_UNINITIALIZED 0
-#define TNC_UNSYNC_STARTUP 1
-#define TNC_UNSYNCED 2
-#define TNC_IN_SYNC 3
-
-static void __tnc_set_sync_state(struct sixpack *sp, int new_tnc_state)
-{
- char *msg;
-
- switch (new_tnc_state) {
- default: /* gcc oh piece-o-crap ... */
- case TNC_UNSYNC_STARTUP:
- msg = "Synchronizing with TNC";
- break;
- case TNC_UNSYNCED:
- msg = "Lost synchronization with TNC\n";
- break;
- case TNC_IN_SYNC:
- msg = "Found TNC";
- break;
- }
-
- sp->tnc_state = new_tnc_state;
- printk(KERN_INFO "%s: %s\n", sp->dev->name, msg);
-}
-
-static inline void tnc_set_sync_state(struct sixpack *sp, int new_tnc_state)
-{
- int old_tnc_state = sp->tnc_state;
-
- if (old_tnc_state != new_tnc_state)
- __tnc_set_sync_state(sp, new_tnc_state);
-}
-
-static void resync_tnc(struct timer_list *t)
-{
- struct sixpack *sp = timer_container_of(sp, t, resync_t);
- static char resync_cmd = 0xe8;
-
- /* clear any data that might have been received */
-
- sp->rx_count = 0;
- sp->rx_count_cooked = 0;
-
- /* reset state machine */
-
- sp->status = 1;
- sp->status1 = 1;
- sp->status2 = 0;
-
- /* resync the TNC */
-
- sp->led_state = 0x60;
- sp->tty->ops->write(sp->tty, &sp->led_state, 1);
- sp->tty->ops->write(sp->tty, &resync_cmd, 1);
-
-
- /* Start resync timer again -- the TNC might be still absent */
- mod_timer(&sp->resync_t, jiffies + SIXP_RESYNC_TIMEOUT);
-}
-
-static inline int tnc_init(struct sixpack *sp)
-{
- unsigned char inbyte = 0xe8;
-
- tnc_set_sync_state(sp, TNC_UNSYNC_STARTUP);
-
- sp->tty->ops->write(sp->tty, &inbyte, 1);
-
- mod_timer(&sp->resync_t, jiffies + SIXP_RESYNC_TIMEOUT);
-
- return 0;
-}
-
-/*
- * Open the high-level part of the 6pack channel.
- * This function is called by the TTY module when the
- * 6pack line discipline is called for. Because we are
- * sure the tty line exists, we only have to link it to
- * a free 6pcack channel...
- */
-static int sixpack_open(struct tty_struct *tty)
-{
- char *xbuff = NULL;
- struct net_device *dev;
- struct sixpack *sp;
- unsigned long len;
- int err = 0;
-
- if (!capable(CAP_NET_ADMIN))
- return -EPERM;
- if (tty->ops->write == NULL)
- return -EOPNOTSUPP;
-
- dev = alloc_netdev(sizeof(struct sixpack), "sp%d", NET_NAME_UNKNOWN,
- sp_setup);
- if (!dev) {
- err = -ENOMEM;
- goto out;
- }
-
- sp = netdev_priv(dev);
- sp->dev = dev;
-
- spin_lock_init(&sp->lock);
- spin_lock_init(&sp->rxlock);
-
- /* !!! length of the buffers. MTU is IP MTU, not PACLEN! */
-
- len = dev->mtu * 2;
-
- xbuff = kmalloc(len + 4, GFP_KERNEL);
- if (xbuff == NULL) {
- err = -ENOBUFS;
- goto out_free;
- }
-
- spin_lock_bh(&sp->lock);
-
- sp->tty = tty;
-
- sp->xbuff = xbuff;
-
- sp->rcount = 0;
- sp->rx_count = 0;
- sp->rx_count_cooked = 0;
- sp->xleft = 0;
-
- sp->flags = 0; /* Clear ESCAPE & ERROR flags */
-
- sp->duplex = 0;
- sp->tx_delay = SIXP_TXDELAY;
- sp->persistence = SIXP_PERSIST;
- sp->slottime = SIXP_SLOTTIME;
- sp->led_state = 0x60;
- sp->status = 1;
- sp->status1 = 1;
- sp->status2 = 0;
- sp->tx_enable = 0;
-
- netif_start_queue(dev);
-
- timer_setup(&sp->tx_t, sp_xmit_on_air, 0);
-
- timer_setup(&sp->resync_t, resync_tnc, 0);
-
- spin_unlock_bh(&sp->lock);
-
- /* Done. We have linked the TTY line to a channel. */
- tty->disc_data = sp;
- tty->receive_room = 65536;
-
- /* Now we're ready to register. */
- err = register_netdev(dev);
- if (err)
- goto out_free;
-
- tnc_init(sp);
-
- return 0;
-
-out_free:
- kfree(xbuff);
-
- free_netdev(dev);
-
-out:
- return err;
-}
-
-
-/*
- * Close down a 6pack channel.
- * This means flushing out any pending queues, and then restoring the
- * TTY line discipline to what it was before it got hooked to 6pack
- * (which usually is TTY again).
- */
-static void sixpack_close(struct tty_struct *tty)
-{
- struct sixpack *sp;
-
- sp = tty->disc_data;
- if (!sp)
- return;
-
- tty->disc_data = NULL;
-
- /* We must stop the queue to avoid potentially scribbling
- * on the free buffers. The sp->dead completion is not sufficient
- * to protect us from sp->xbuff access.
- */
- netif_stop_queue(sp->dev);
-
- unregister_netdev(sp->dev);
-
- timer_delete_sync(&sp->tx_t);
- timer_delete_sync(&sp->resync_t);
-
- /* Free all 6pack frame buffers after unreg. */
- kfree(sp->xbuff);
-
- free_netdev(sp->dev);
-}
-
-/* Perform I/O control on an active 6pack channel. */
-static int sixpack_ioctl(struct tty_struct *tty, unsigned int cmd,
- unsigned long arg)
-{
- struct sixpack *sp = tty->disc_data;
- struct net_device *dev;
- unsigned int tmp, err;
-
- if (!sp)
- return -ENXIO;
- dev = sp->dev;
-
- switch(cmd) {
- case SIOCGIFNAME:
- err = copy_to_user((void __user *) arg, dev->name,
- strlen(dev->name) + 1) ? -EFAULT : 0;
- break;
-
- case SIOCGIFENCAP:
- err = put_user(0, (int __user *) arg);
- break;
-
- case SIOCSIFENCAP:
- if (get_user(tmp, (int __user *) arg)) {
- err = -EFAULT;
- break;
- }
-
- sp->mode = tmp;
- dev->addr_len = AX25_ADDR_LEN;
- dev->hard_header_len = AX25_KISS_HEADER_LEN +
- AX25_MAX_HEADER_LEN + 3;
- dev->type = ARPHRD_AX25;
-
- err = 0;
- break;
-
- case SIOCSIFHWADDR: {
- char addr[AX25_ADDR_LEN];
-
- if (copy_from_user(&addr,
- (void __user *)arg, AX25_ADDR_LEN)) {
- err = -EFAULT;
- break;
- }
-
- netif_tx_lock_bh(dev);
- __dev_addr_set(dev, &addr, AX25_ADDR_LEN);
- netif_tx_unlock_bh(dev);
- err = 0;
- break;
- }
- default:
- err = tty_mode_ioctl(tty, cmd, arg);
- }
-
- return err;
-}
-
-static struct tty_ldisc_ops sp_ldisc = {
- .owner = THIS_MODULE,
- .num = N_6PACK,
- .name = "6pack",
- .open = sixpack_open,
- .close = sixpack_close,
- .ioctl = sixpack_ioctl,
- .receive_buf = sixpack_receive_buf,
- .write_wakeup = sixpack_write_wakeup,
-};
-
-/* Initialize 6pack control device -- register 6pack line discipline */
-
-static int __init sixpack_init_driver(void)
-{
- int status;
-
- /* Register the provided line protocol discipline */
- status = tty_register_ldisc(&sp_ldisc);
- if (status)
- pr_err("6pack: can't register line discipline (err = %d)\n", status);
-
- return status;
-}
-
-static void __exit sixpack_exit_driver(void)
-{
- tty_unregister_ldisc(&sp_ldisc);
-}
-
-/* encode an AX.25 packet into 6pack */
-
-static int encode_sixpack(unsigned char *tx_buf, unsigned char *tx_buf_raw,
- int length, unsigned char tx_delay)
-{
- int count = 0;
- unsigned char checksum = 0, buf[400];
- int raw_count = 0;
-
- tx_buf_raw[raw_count++] = SIXP_PRIO_CMD_MASK | SIXP_TX_MASK;
- tx_buf_raw[raw_count++] = SIXP_SEOF;
-
- buf[0] = tx_delay;
- for (count = 1; count < length; count++)
- buf[count] = tx_buf[count];
-
- for (count = 0; count < length; count++)
- checksum += buf[count];
- buf[length] = (unsigned char) 0xff - checksum;
-
- for (count = 0; count <= length; count++) {
- if ((count % 3) == 0) {
- tx_buf_raw[raw_count++] = (buf[count] & 0x3f);
- tx_buf_raw[raw_count] = ((buf[count] >> 2) & 0x30);
- } else if ((count % 3) == 1) {
- tx_buf_raw[raw_count++] |= (buf[count] & 0x0f);
- tx_buf_raw[raw_count] = ((buf[count] >> 2) & 0x3c);
- } else {
- tx_buf_raw[raw_count++] |= (buf[count] & 0x03);
- tx_buf_raw[raw_count++] = (buf[count] >> 2);
- }
- }
- if ((length % 3) != 2)
- raw_count++;
- tx_buf_raw[raw_count++] = SIXP_SEOF;
- return raw_count;
-}
-
-/* decode 4 sixpack-encoded bytes into 3 data bytes */
-
-static void decode_data(struct sixpack *sp, u8 inbyte)
-{
- u8 *buf;
-
- if (sp->rx_count != 3) {
- sp->raw_buf[sp->rx_count++] = inbyte;
-
- return;
- }
-
- if (sp->rx_count_cooked + 2 >= sizeof(sp->cooked_buf)) {
- pr_err("6pack: cooked buffer overrun, data loss\n");
- sp->rx_count = 0;
- return;
- }
-
- buf = sp->raw_buf;
- sp->cooked_buf[sp->rx_count_cooked++] =
- buf[0] | ((buf[1] << 2) & 0xc0);
- sp->cooked_buf[sp->rx_count_cooked++] =
- (buf[1] & 0x0f) | ((buf[2] << 2) & 0xf0);
- sp->cooked_buf[sp->rx_count_cooked++] =
- (buf[2] & 0x03) | (inbyte << 2);
- sp->rx_count = 0;
-}
-
-/* identify and execute a 6pack priority command byte */
-
-static void decode_prio_command(struct sixpack *sp, u8 cmd)
-{
- ssize_t actual;
-
- if ((cmd & SIXP_PRIO_DATA_MASK) != 0) { /* idle ? */
-
- /* RX and DCD flags can only be set in the same prio command,
- if the DCD flag has been set without the RX flag in the previous
- prio command. If DCD has not been set before, something in the
- transmission has gone wrong. In this case, RX and DCD are
- cleared in order to prevent the decode_data routine from
- reading further data that might be corrupt. */
-
- if (((sp->status & SIXP_DCD_MASK) == 0) &&
- ((cmd & SIXP_RX_DCD_MASK) == SIXP_RX_DCD_MASK)) {
- if (sp->status != 1)
- printk(KERN_DEBUG "6pack: protocol violation\n");
- else
- sp->status = 0;
- cmd &= ~SIXP_RX_DCD_MASK;
- }
- sp->status = cmd & SIXP_PRIO_DATA_MASK;
- } else { /* output watchdog char if idle */
- if ((sp->status2 != 0) && (sp->duplex == 1)) {
- sp->led_state = 0x70;
- sp->tty->ops->write(sp->tty, &sp->led_state, 1);
- sp->tx_enable = 1;
- actual = sp->tty->ops->write(sp->tty, sp->xbuff, sp->status2);
- sp->xleft -= actual;
- sp->xhead += actual;
- sp->led_state = 0x60;
- sp->status2 = 0;
-
- }
- }
-
- /* needed to trigger the TNC watchdog */
- sp->tty->ops->write(sp->tty, &sp->led_state, 1);
-
- /* if the state byte has been received, the TNC is present,
- so the resync timer can be reset. */
-
- if (sp->tnc_state == TNC_IN_SYNC)
- mod_timer(&sp->resync_t, jiffies + SIXP_INIT_RESYNC_TIMEOUT);
-
- sp->status1 = cmd & SIXP_PRIO_DATA_MASK;
-}
-
-/* identify and execute a standard 6pack command byte */
-
-static void decode_std_command(struct sixpack *sp, u8 cmd)
-{
- u8 checksum = 0, rest = 0;
- short i;
-
- switch (cmd & SIXP_CMD_MASK) { /* normal command */
- case SIXP_SEOF:
- if ((sp->rx_count == 0) && (sp->rx_count_cooked == 0)) {
- if ((sp->status & SIXP_RX_DCD_MASK) ==
- SIXP_RX_DCD_MASK) {
- sp->led_state = 0x68;
- sp->tty->ops->write(sp->tty, &sp->led_state, 1);
- }
- } else {
- sp->led_state = 0x60;
- /* fill trailing bytes with zeroes */
- sp->tty->ops->write(sp->tty, &sp->led_state, 1);
- spin_lock_bh(&sp->rxlock);
- rest = sp->rx_count;
- if (rest != 0)
- for (i = rest; i <= 3; i++)
- decode_data(sp, 0);
- if (rest == 2)
- sp->rx_count_cooked -= 2;
- else if (rest == 3)
- sp->rx_count_cooked -= 1;
- for (i = 0; i < sp->rx_count_cooked; i++)
- checksum += sp->cooked_buf[i];
- if (checksum != SIXP_CHKSUM) {
- printk(KERN_DEBUG "6pack: bad checksum %2.2x\n", checksum);
- } else {
- sp->rcount = sp->rx_count_cooked-2;
- sp_bump(sp, 0);
- }
- sp->rx_count_cooked = 0;
- spin_unlock_bh(&sp->rxlock);
- }
- break;
- case SIXP_TX_URUN: printk(KERN_DEBUG "6pack: TX underrun\n");
- break;
- case SIXP_RX_ORUN: printk(KERN_DEBUG "6pack: RX overrun\n");
- break;
- case SIXP_RX_BUF_OVL:
- printk(KERN_DEBUG "6pack: RX buffer overflow\n");
- }
-}
-
-/* decode a 6pack packet */
-
-static void
-sixpack_decode(struct sixpack *sp, const u8 *pre_rbuff, size_t count)
-{
- size_t count1;
- u8 inbyte;
-
- for (count1 = 0; count1 < count; count1++) {
- inbyte = pre_rbuff[count1];
- if (inbyte == SIXP_FOUND_TNC) {
- tnc_set_sync_state(sp, TNC_IN_SYNC);
- timer_delete(&sp->resync_t);
- }
- if ((inbyte & SIXP_PRIO_CMD_MASK) != 0)
- decode_prio_command(sp, inbyte);
- else if ((inbyte & SIXP_STD_CMD_MASK) != 0)
- decode_std_command(sp, inbyte);
- else if ((sp->status & SIXP_RX_DCD_MASK) == SIXP_RX_DCD_MASK) {
- spin_lock_bh(&sp->rxlock);
- decode_data(sp, inbyte);
- spin_unlock_bh(&sp->rxlock);
- }
- }
-}
-
-MODULE_AUTHOR("Ralf Baechle DO1GRB <ralf@linux-mips.org>");
-MODULE_DESCRIPTION("6pack driver for AX.25");
-MODULE_LICENSE("GPL");
-MODULE_ALIAS_LDISC(N_6PACK);
-
-module_init(sixpack_init_driver);
-module_exit(sixpack_exit_driver);
+++ /dev/null
-# SPDX-License-Identifier: GPL-2.0-only
-config MKISS
- tristate "Serial port KISS driver"
- depends on AX25 && TTY
- select CRC16
- help
- KISS is a protocol used for the exchange of data between a computer
- and a Terminal Node Controller (a small embedded system commonly
- used for networking over AX.25 amateur radio connections; it
- connects the computer's serial port with the radio's microphone
- input and speaker output).
-
- Although KISS is less advanced than the 6pack protocol, it has
- the advantage that it is already supported by most modern TNCs
- without the need for a firmware upgrade.
-
- To compile this driver as a module, choose M here: the module
- will be called mkiss.
-
-config 6PACK
- tristate "Serial port 6PACK driver"
- depends on AX25 && TTY
- help
- 6pack is a transmission protocol for the data exchange between your
- PC and your TNC (the Terminal Node Controller acts as a kind of
- modem connecting your computer's serial port to your radio's
- microphone input and speaker output). This protocol can be used as
- an alternative to KISS for networking over AX.25 amateur radio
- connections, but it has some extended functionality.
-
- Note that this driver is still experimental and might cause
- problems. For details about the features and the usage of the
- driver, read <file:Documentation/networking/6pack.rst>.
-
- To compile this driver as a module, choose M here: the module
- will be called 6pack.
-
-config BPQETHER
- tristate "BPQ Ethernet driver"
- depends on AX25
- help
- AX.25 is the protocol used for computer communication over amateur
- radio. If you say Y here, you will be able to send and receive AX.25
- traffic over Ethernet (also called "BPQ AX.25"), which could be
- useful if some other computer on your local network has a direct
- amateur radio connection.
-
-config SCC
- tristate "Z8530 SCC driver"
- depends on ISA && AX25
- help
- These cards are used to connect your Linux box to an amateur radio
- in order to communicate with other computers. If you want to use
- this, read
- <file:Documentation/networking/device_drivers/hamradio/z8530drv.rst>
- and the AX25-HOWTO, available from
- <http://www.tldp.org/docs.html#howto>. Also make sure to say Y
- to "Amateur Radio AX.25 Level 2" support.
-
- To compile this driver as a module, choose M here: the module
- will be called scc.
-
-config SCC_DELAY
- bool "additional delay for PA0HZP OptoSCC compatible boards"
- depends on SCC
- help
- Say Y here if you experience problems with the SCC driver not
- working properly; please read
- <file:Documentation/networking/device_drivers/hamradio/z8530drv.rst>
- for details.
-
- If unsure, say N.
-
-config SCC_TRXECHO
- bool "support for TRX that feedback the tx signal to rx"
- depends on SCC
- help
- Some transmitters feed the transmitted signal back to the receive
- line. Say Y here to foil this by explicitly disabling the receiver
- during data transmission.
-
- If in doubt, say Y.
-
-config BAYCOM_SER_FDX
- tristate "BAYCOM ser12 fullduplex driver for AX.25"
- depends on AX25 && HAS_IOPORT
- select CRC_CCITT
- help
- This is one of two drivers for Baycom style simple amateur radio
- modems that connect to a serial interface. The driver supports the
- ser12 design in full-duplex mode. In addition, it allows the
- baudrate to be set between 300 and 4800 baud (however not all modems
- support all baudrates). This is the preferred driver. The next
- driver, "BAYCOM ser12 half-duplex driver for AX.25" is the old
- driver and still provided in case this driver does not work with
- your serial interface chip. To configure the driver, use the sethdlc
- utility available in the standard ax25 utilities package.
- For more information on the modems, see
- <file:Documentation/networking/device_drivers/hamradio/baycom.rst>.
-
- To compile this driver as a module, choose M here: the module
- will be called baycom_ser_fdx. This is recommended.
-
-config BAYCOM_SER_HDX
- tristate "BAYCOM ser12 halfduplex driver for AX.25"
- depends on AX25 && HAS_IOPORT
- select CRC_CCITT
- help
- This is one of two drivers for Baycom style simple amateur radio
- modems that connect to a serial interface. The driver supports the
- ser12 design in half-duplex mode. This is the old driver. It is
- still provided in case your serial interface chip does not work with
- the full-duplex driver. This driver is deprecated. To configure
- the driver, use the sethdlc utility available in the standard ax25
- utilities package. For more information on the modems, see
- <file:Documentation/networking/device_drivers/hamradio/baycom.rst>.
-
- To compile this driver as a module, choose M here: the module
- will be called baycom_ser_hdx. This is recommended.
-
-config BAYCOM_PAR
- tristate "BAYCOM picpar and par96 driver for AX.25"
- depends on PARPORT && AX25
- select CRC_CCITT
- help
- This is a driver for Baycom style simple amateur radio modems that
- connect to a parallel interface. The driver supports the picpar and
- par96 designs. To configure the driver, use the sethdlc utility
- available in the standard ax25 utilities package.
- For more information on the modems, see
- <file:Documentation/networking/device_drivers/hamradio/baycom.rst>.
-
- To compile this driver as a module, choose M here: the module
- will be called baycom_par. This is recommended.
-
-config BAYCOM_EPP
- tristate "BAYCOM epp driver for AX.25"
- depends on PARPORT && AX25 && !64BIT
- select CRC_CCITT
- help
- This is a driver for Baycom style simple amateur radio modems that
- connect to a parallel interface. The driver supports the EPP
- designs. To configure the driver, use the sethdlc utility available
- in the standard ax25 utilities package.
- For more information on the modems, see
- <file:Documentation/networking/device_drivers/hamradio/baycom.rst>.
-
- To compile this driver as a module, choose M here: the module
- will be called baycom_epp. This is recommended.
-
-config YAM
- tristate "YAM driver for AX.25"
- depends on AX25 && HAS_IOPORT
- help
- The YAM is a modem for packet radio which connects to the serial
- port and includes some of the functions of a Terminal Node
- Controller. If you have one of those, say Y here.
-
- To compile this driver as a module, choose M here: the module
- will be called yam.
-
-
+++ /dev/null
-# SPDX-License-Identifier: GPL-2.0
-#
-# Makefile for the Linux AX.25 and HFMODEM device drivers.
-#
-#
-# 19971130 Moved the amateur radio related network drivers from
-# drivers/net/ to drivers/hamradio for easier maintenance.
-# Joerg Reuter DL1BKE <jreuter@yaina.de>
-#
-# 20000806 Rewritten to use lists instead of if-statements.
-# Christoph Hellwig <hch@infradead.org>
-#
-
-obj-$(CONFIG_SCC) += scc.o
-obj-$(CONFIG_MKISS) += mkiss.o
-obj-$(CONFIG_6PACK) += 6pack.o
-obj-$(CONFIG_YAM) += yam.o
-obj-$(CONFIG_BPQETHER) += bpqether.o
-obj-$(CONFIG_BAYCOM_SER_FDX) += baycom_ser_fdx.o hdlcdrv.o
-obj-$(CONFIG_BAYCOM_SER_HDX) += baycom_ser_hdx.o hdlcdrv.o
-obj-$(CONFIG_BAYCOM_PAR) += baycom_par.o hdlcdrv.o
-obj-$(CONFIG_BAYCOM_EPP) += baycom_epp.o hdlcdrv.o
+++ /dev/null
-// SPDX-License-Identifier: GPL-2.0-or-later
-/*****************************************************************************/
-
-/*
- * baycom_epp.c -- baycom epp radio modem driver.
- *
- * Copyright (C) 1998-2000
- * Thomas Sailer (sailer@ife.ee.ethz.ch)
- *
- * Please note that the GPL allows you to use the driver, NOT the radio.
- * In order to use the radio, you need a license from the communications
- * authority of your country.
- *
- * History:
- * 0.1 xx.xx.1998 Initial version by Matthias Welwarsky (dg2fef)
- * 0.2 21.04.1998 Massive rework by Thomas Sailer
- * Integrated FPGA EPP modem configuration routines
- * 0.3 11.05.1998 Took FPGA config out and moved it into a separate program
- * 0.4 26.07.1999 Adapted to new lowlevel parport driver interface
- * 0.5 03.08.1999 adapt to Linus' new __setup/__initcall
- * removed some pre-2.2 kernel compatibility cruft
- * 0.6 10.08.1999 Check if parport can do SPP and is safe to access during interrupt contexts
- * 0.7 12.02.2000 adapted to softnet driver interface
- */
-
-/*****************************************************************************/
-
-#include <linux/crc-ccitt.h>
-#include <linux/module.h>
-#include <linux/kernel.h>
-#include <linux/init.h>
-#include <linux/sched.h>
-#include <linux/string.h>
-#include <linux/workqueue.h>
-#include <linux/fs.h>
-#include <linux/parport.h>
-#include <linux/if_arp.h>
-#include <linux/hdlcdrv.h>
-#include <linux/baycom.h>
-#include <linux/jiffies.h>
-#include <linux/random.h>
-#include <net/ax25.h>
-#include <linux/uaccess.h>
-
-/* --------------------------------------------------------------------- */
-
-#define BAYCOM_DEBUG
-#define BAYCOM_MAGIC 19730510
-
-/* --------------------------------------------------------------------- */
-
-static const char paranoia_str[] = KERN_ERR
- "baycom_epp: bad magic number for hdlcdrv_state struct in routine %s\n";
-
-static const char bc_drvname[] = "baycom_epp";
-static const char bc_drvinfo[] = KERN_INFO "baycom_epp: (C) 1998-2000 Thomas Sailer, HB9JNX/AE4WA\n"
-"baycom_epp: version 0.7\n";
-
-/* --------------------------------------------------------------------- */
-
-#define NR_PORTS 4
-
-static struct net_device *baycom_device[NR_PORTS];
-
-/* --------------------------------------------------------------------- */
-
-/* EPP status register */
-#define EPP_DCDBIT 0x80
-#define EPP_PTTBIT 0x08
-#define EPP_NREF 0x01
-#define EPP_NRAEF 0x02
-#define EPP_NRHF 0x04
-#define EPP_NTHF 0x20
-#define EPP_NTAEF 0x10
-#define EPP_NTEF EPP_PTTBIT
-
-/* EPP control register */
-#define EPP_TX_FIFO_ENABLE 0x10
-#define EPP_RX_FIFO_ENABLE 0x08
-#define EPP_MODEM_ENABLE 0x20
-#define EPP_LEDS 0xC0
-#define EPP_IRQ_ENABLE 0x10
-
-/* LPT registers */
-#define LPTREG_ECONTROL 0x402
-#define LPTREG_CONFIGB 0x401
-#define LPTREG_CONFIGA 0x400
-#define LPTREG_EPPDATA 0x004
-#define LPTREG_EPPADDR 0x003
-#define LPTREG_CONTROL 0x002
-#define LPTREG_STATUS 0x001
-#define LPTREG_DATA 0x000
-
-/* LPT control register */
-#define LPTCTRL_PROGRAM 0x04 /* 0 to reprogram */
-#define LPTCTRL_WRITE 0x01
-#define LPTCTRL_ADDRSTB 0x08
-#define LPTCTRL_DATASTB 0x02
-#define LPTCTRL_INTEN 0x10
-
-/* LPT status register */
-#define LPTSTAT_SHIFT_NINTR 6
-#define LPTSTAT_WAIT 0x80
-#define LPTSTAT_NINTR (1<<LPTSTAT_SHIFT_NINTR)
-#define LPTSTAT_PE 0x20
-#define LPTSTAT_DONE 0x10
-#define LPTSTAT_NERROR 0x08
-#define LPTSTAT_EPPTIMEOUT 0x01
-
-/* LPT data register */
-#define LPTDATA_SHIFT_TDI 0
-#define LPTDATA_SHIFT_TMS 2
-#define LPTDATA_TDI (1<<LPTDATA_SHIFT_TDI)
-#define LPTDATA_TCK 0x02
-#define LPTDATA_TMS (1<<LPTDATA_SHIFT_TMS)
-#define LPTDATA_INITBIAS 0x80
-
-
-/* EPP modem config/status bits */
-#define EPP_DCDBIT 0x80
-#define EPP_PTTBIT 0x08
-#define EPP_RXEBIT 0x01
-#define EPP_RXAEBIT 0x02
-#define EPP_RXHFULL 0x04
-
-#define EPP_NTHF 0x20
-#define EPP_NTAEF 0x10
-#define EPP_NTEF EPP_PTTBIT
-
-#define EPP_TX_FIFO_ENABLE 0x10
-#define EPP_RX_FIFO_ENABLE 0x08
-#define EPP_MODEM_ENABLE 0x20
-#define EPP_LEDS 0xC0
-#define EPP_IRQ_ENABLE 0x10
-
-/* Xilinx 4k JTAG instructions */
-#define XC4K_IRLENGTH 3
-#define XC4K_EXTEST 0
-#define XC4K_PRELOAD 1
-#define XC4K_CONFIGURE 5
-#define XC4K_BYPASS 7
-
-#define EPP_CONVENTIONAL 0
-#define EPP_FPGA 1
-#define EPP_FPGAEXTSTATUS 2
-
-#define TXBUFFER_SIZE ((HDLCDRV_MAXFLEN*6/5)+8)
-
-/* ---------------------------------------------------------------------- */
-/*
- * Information that need to be kept for each board.
- */
-
-struct baycom_state {
- int magic;
-
- struct pardevice *pdev;
- struct net_device *dev;
- unsigned int work_running;
- struct delayed_work run_work;
- unsigned int modem;
- unsigned int bitrate;
- unsigned char stat;
-
- struct {
- unsigned int intclk;
- unsigned int fclk;
- unsigned int bps;
- unsigned int extmodem;
- unsigned int loopback;
- } cfg;
-
- struct hdlcdrv_channel_params ch_params;
-
- struct {
- unsigned int bitbuf, bitstream, numbits, state;
- unsigned char *bufptr;
- int bufcnt;
- unsigned char buf[TXBUFFER_SIZE];
- } hdlcrx;
-
- struct {
- int calibrate;
- int slotcnt;
- int flags;
- enum { tx_idle = 0, tx_keyup, tx_data, tx_tail } state;
- unsigned char *bufptr;
- int bufcnt;
- unsigned char buf[TXBUFFER_SIZE];
- } hdlctx;
-
- unsigned int ptt_keyed;
- struct sk_buff *skb; /* next transmit packet */
-
-#ifdef BAYCOM_DEBUG
- struct debug_vals {
- unsigned long last_jiffies;
- unsigned cur_intcnt;
- unsigned last_intcnt;
- int cur_pllcorr;
- int last_pllcorr;
- unsigned int mod_cycles;
- unsigned int demod_cycles;
- } debug_vals;
-#endif /* BAYCOM_DEBUG */
-};
-
-/* --------------------------------------------------------------------- */
-
-#define KISS_VERBOSE
-
-/* --------------------------------------------------------------------- */
-
-#define PARAM_TXDELAY 1
-#define PARAM_PERSIST 2
-#define PARAM_SLOTTIME 3
-#define PARAM_TXTAIL 4
-#define PARAM_FULLDUP 5
-#define PARAM_HARDWARE 6
-#define PARAM_RETURN 255
-
-/* --------------------------------------------------------------------- */
-/*
- * the CRC routines are stolen from WAMPES
- * by Dieter Deyke
- */
-
-
-/*---------------------------------------------------------------------------*/
-
-#if 0
-static inline void append_crc_ccitt(unsigned char *buffer, int len)
-{
- unsigned int crc = 0xffff;
-
- for (;len>0;len--)
- crc = (crc >> 8) ^ crc_ccitt_table[(crc ^ *buffer++) & 0xff];
- crc ^= 0xffff;
- *buffer++ = crc;
- *buffer++ = crc >> 8;
-}
-#endif
-
-/*---------------------------------------------------------------------------*/
-
-static inline int check_crc_ccitt(const unsigned char *buf, int cnt)
-{
- return (crc_ccitt(0xffff, buf, cnt) & 0xffff) == 0xf0b8;
-}
-
-/*---------------------------------------------------------------------------*/
-
-static inline int calc_crc_ccitt(const unsigned char *buf, int cnt)
-{
- return (crc_ccitt(0xffff, buf, cnt) ^ 0xffff) & 0xffff;
-}
-
-/* ---------------------------------------------------------------------- */
-
-#define tenms_to_flags(bc,tenms) ((tenms * bc->bitrate) / 800)
-
-/* --------------------------------------------------------------------- */
-
-static inline void baycom_int_freq(struct baycom_state *bc)
-{
-#ifdef BAYCOM_DEBUG
- unsigned long cur_jiffies = jiffies;
- /*
- * measure the interrupt frequency
- */
- bc->debug_vals.cur_intcnt++;
- if (time_after_eq(cur_jiffies, bc->debug_vals.last_jiffies + HZ)) {
- bc->debug_vals.last_jiffies = cur_jiffies;
- bc->debug_vals.last_intcnt = bc->debug_vals.cur_intcnt;
- bc->debug_vals.cur_intcnt = 0;
- bc->debug_vals.last_pllcorr = bc->debug_vals.cur_pllcorr;
- bc->debug_vals.cur_pllcorr = 0;
- }
-#endif /* BAYCOM_DEBUG */
-}
-
-/* ---------------------------------------------------------------------- */
-/*
- * eppconfig_path should be setable via /proc/sys.
- */
-
-static char const eppconfig_path[] = "/usr/sbin/eppfpga";
-
-static char *envp[] = { "HOME=/", "TERM=linux", "PATH=/usr/bin:/bin", NULL };
-
-/* eppconfig: called during ifconfig up to configure the modem */
-static int eppconfig(struct baycom_state *bc)
-{
- char modearg[256];
- char portarg[16];
- char *argv[] = {
- (char *)eppconfig_path,
- "-s",
- "-p", portarg,
- "-m", modearg,
- NULL };
-
- /* set up arguments */
- sprintf(modearg, "%sclk,%smodem,fclk=%d,bps=%d,divider=%d%s,extstat",
- bc->cfg.intclk ? "int" : "ext",
- bc->cfg.extmodem ? "ext" : "int", bc->cfg.fclk, bc->cfg.bps,
- (bc->cfg.fclk + 8 * bc->cfg.bps) / (16 * bc->cfg.bps),
- bc->cfg.loopback ? ",loopback" : "");
- sprintf(portarg, "%ld", bc->pdev->port->base);
- printk(KERN_DEBUG "%s: %s -s -p %s -m %s\n", bc_drvname, eppconfig_path, portarg, modearg);
-
- return call_usermodehelper(eppconfig_path, argv, envp, UMH_WAIT_PROC);
-}
-
-/* ---------------------------------------------------------------------- */
-
-static inline void do_kiss_params(struct baycom_state *bc,
- unsigned char *data, unsigned long len)
-{
-
-#ifdef KISS_VERBOSE
-#define PKP(a,b) printk(KERN_INFO "baycomm_epp: channel params: " a "\n", b)
-#else /* KISS_VERBOSE */
-#define PKP(a,b)
-#endif /* KISS_VERBOSE */
-
- if (len < 2)
- return;
- switch(data[0]) {
- case PARAM_TXDELAY:
- bc->ch_params.tx_delay = data[1];
- PKP("TX delay = %ums", 10 * bc->ch_params.tx_delay);
- break;
- case PARAM_PERSIST:
- bc->ch_params.ppersist = data[1];
- PKP("p persistence = %u", bc->ch_params.ppersist);
- break;
- case PARAM_SLOTTIME:
- bc->ch_params.slottime = data[1];
- PKP("slot time = %ums", bc->ch_params.slottime);
- break;
- case PARAM_TXTAIL:
- bc->ch_params.tx_tail = data[1];
- PKP("TX tail = %ums", bc->ch_params.tx_tail);
- break;
- case PARAM_FULLDUP:
- bc->ch_params.fulldup = !!data[1];
- PKP("%s duplex", bc->ch_params.fulldup ? "full" : "half");
- break;
- default:
- break;
- }
-#undef PKP
-}
-
-/* --------------------------------------------------------------------- */
-
-static void encode_hdlc(struct baycom_state *bc)
-{
- struct sk_buff *skb;
- unsigned char *wp, *bp;
- int pkt_len;
- unsigned bitstream, notbitstream, bitbuf, numbit, crc;
- unsigned char crcarr[2];
- int j;
-
- if (bc->hdlctx.bufcnt > 0)
- return;
- skb = bc->skb;
- if (!skb)
- return;
- bc->skb = NULL;
- pkt_len = skb->len-1; /* strip KISS byte */
- wp = bc->hdlctx.buf;
- bp = skb->data+1;
- crc = calc_crc_ccitt(bp, pkt_len);
- crcarr[0] = crc;
- crcarr[1] = crc >> 8;
- *wp++ = 0x7e;
- bitstream = bitbuf = numbit = 0;
- while (pkt_len > -2) {
- bitstream >>= 8;
- bitstream |= ((unsigned int)*bp) << 8;
- bitbuf |= ((unsigned int)*bp) << numbit;
- notbitstream = ~bitstream;
- bp++;
- pkt_len--;
- if (!pkt_len)
- bp = crcarr;
- for (j = 0; j < 8; j++)
- if (unlikely(!(notbitstream & (0x1f0 << j)))) {
- bitstream &= ~(0x100 << j);
- bitbuf = (bitbuf & (((2 << j) << numbit) - 1)) |
- ((bitbuf & ~(((2 << j) << numbit) - 1)) << 1);
- numbit++;
- notbitstream = ~bitstream;
- }
- numbit += 8;
- while (numbit >= 8) {
- *wp++ = bitbuf;
- bitbuf >>= 8;
- numbit -= 8;
- }
- }
- bitbuf |= 0x7e7e << numbit;
- numbit += 16;
- while (numbit >= 8) {
- *wp++ = bitbuf;
- bitbuf >>= 8;
- numbit -= 8;
- }
- bc->hdlctx.bufptr = bc->hdlctx.buf;
- bc->hdlctx.bufcnt = wp - bc->hdlctx.buf;
- dev_kfree_skb(skb);
- bc->dev->stats.tx_packets++;
-}
-
-/* ---------------------------------------------------------------------- */
-
-static int transmit(struct baycom_state *bc, int cnt, unsigned char stat)
-{
- struct parport *pp = bc->pdev->port;
- unsigned char tmp[128];
- int i, j;
-
- if (bc->hdlctx.state == tx_tail && !(stat & EPP_PTTBIT))
- bc->hdlctx.state = tx_idle;
- if (bc->hdlctx.state == tx_idle && bc->hdlctx.calibrate <= 0) {
- if (bc->hdlctx.bufcnt <= 0)
- encode_hdlc(bc);
- if (bc->hdlctx.bufcnt <= 0)
- return 0;
- if (!bc->ch_params.fulldup) {
- if (!(stat & EPP_DCDBIT)) {
- bc->hdlctx.slotcnt = bc->ch_params.slottime;
- return 0;
- }
- if ((--bc->hdlctx.slotcnt) > 0)
- return 0;
- bc->hdlctx.slotcnt = bc->ch_params.slottime;
- if (get_random_u8() > bc->ch_params.ppersist)
- return 0;
- }
- }
- if (bc->hdlctx.state == tx_idle && bc->hdlctx.bufcnt > 0) {
- bc->hdlctx.state = tx_keyup;
- bc->hdlctx.flags = tenms_to_flags(bc, bc->ch_params.tx_delay);
- bc->ptt_keyed++;
- }
- while (cnt > 0) {
- switch (bc->hdlctx.state) {
- case tx_keyup:
- i = min_t(int, cnt, bc->hdlctx.flags);
- cnt -= i;
- bc->hdlctx.flags -= i;
- if (bc->hdlctx.flags <= 0)
- bc->hdlctx.state = tx_data;
- memset(tmp, 0x7e, sizeof(tmp));
- while (i > 0) {
- j = (i > sizeof(tmp)) ? sizeof(tmp) : i;
- if (j != pp->ops->epp_write_data(pp, tmp, j, 0))
- return -1;
- i -= j;
- }
- break;
-
- case tx_data:
- if (bc->hdlctx.bufcnt <= 0) {
- encode_hdlc(bc);
- if (bc->hdlctx.bufcnt <= 0) {
- bc->hdlctx.state = tx_tail;
- bc->hdlctx.flags = tenms_to_flags(bc, bc->ch_params.tx_tail);
- break;
- }
- }
- i = min_t(int, cnt, bc->hdlctx.bufcnt);
- bc->hdlctx.bufcnt -= i;
- cnt -= i;
- if (i != pp->ops->epp_write_data(pp, bc->hdlctx.bufptr, i, 0))
- return -1;
- bc->hdlctx.bufptr += i;
- break;
-
- case tx_tail:
- encode_hdlc(bc);
- if (bc->hdlctx.bufcnt > 0) {
- bc->hdlctx.state = tx_data;
- break;
- }
- i = min_t(int, cnt, bc->hdlctx.flags);
- if (i) {
- cnt -= i;
- bc->hdlctx.flags -= i;
- memset(tmp, 0x7e, sizeof(tmp));
- while (i > 0) {
- j = (i > sizeof(tmp)) ? sizeof(tmp) : i;
- if (j != pp->ops->epp_write_data(pp, tmp, j, 0))
- return -1;
- i -= j;
- }
- break;
- }
- fallthrough;
-
- default:
- if (bc->hdlctx.calibrate <= 0)
- return 0;
- i = min_t(int, cnt, bc->hdlctx.calibrate);
- cnt -= i;
- bc->hdlctx.calibrate -= i;
- memset(tmp, 0, sizeof(tmp));
- while (i > 0) {
- j = (i > sizeof(tmp)) ? sizeof(tmp) : i;
- if (j != pp->ops->epp_write_data(pp, tmp, j, 0))
- return -1;
- i -= j;
- }
- break;
- }
- }
- return 0;
-}
-
-/* ---------------------------------------------------------------------- */
-
-static void do_rxpacket(struct net_device *dev)
-{
- struct baycom_state *bc = netdev_priv(dev);
- struct sk_buff *skb;
- unsigned char *cp;
- unsigned pktlen;
-
- if (bc->hdlcrx.bufcnt < 4)
- return;
- if (!check_crc_ccitt(bc->hdlcrx.buf, bc->hdlcrx.bufcnt))
- return;
- pktlen = bc->hdlcrx.bufcnt-2+1; /* KISS kludge */
- if (!(skb = dev_alloc_skb(pktlen))) {
- printk("%s: memory squeeze, dropping packet\n", dev->name);
- dev->stats.rx_dropped++;
- return;
- }
- cp = skb_put(skb, pktlen);
- *cp++ = 0; /* KISS kludge */
- memcpy(cp, bc->hdlcrx.buf, pktlen - 1);
- skb->protocol = ax25_type_trans(skb, dev);
- netif_rx(skb);
- dev->stats.rx_packets++;
-}
-
-static int receive(struct net_device *dev, int cnt)
-{
- struct baycom_state *bc = netdev_priv(dev);
- struct parport *pp = bc->pdev->port;
- unsigned int bitbuf, notbitstream, bitstream, numbits, state;
- unsigned char tmp[128];
- unsigned char *cp;
- int cnt2, ret = 0;
- int j;
-
- numbits = bc->hdlcrx.numbits;
- state = bc->hdlcrx.state;
- bitstream = bc->hdlcrx.bitstream;
- bitbuf = bc->hdlcrx.bitbuf;
- while (cnt > 0) {
- cnt2 = (cnt > sizeof(tmp)) ? sizeof(tmp) : cnt;
- cnt -= cnt2;
- if (cnt2 != pp->ops->epp_read_data(pp, tmp, cnt2, 0)) {
- ret = -1;
- break;
- }
- cp = tmp;
- for (; cnt2 > 0; cnt2--, cp++) {
- bitstream >>= 8;
- bitstream |= (*cp) << 8;
- bitbuf >>= 8;
- bitbuf |= (*cp) << 8;
- numbits += 8;
- notbitstream = ~bitstream;
- for (j = 0; j < 8; j++) {
-
- /* flag or abort */
- if (unlikely(!(notbitstream & (0x0fc << j)))) {
-
- /* abort received */
- if (!(notbitstream & (0x1fc << j)))
- state = 0;
-
- /* flag received */
- else if ((bitstream & (0x1fe << j)) == (0x0fc << j)) {
- if (state)
- do_rxpacket(dev);
- bc->hdlcrx.bufcnt = 0;
- bc->hdlcrx.bufptr = bc->hdlcrx.buf;
- state = 1;
- numbits = 7-j;
- }
- }
-
- /* stuffed bit */
- else if (unlikely((bitstream & (0x1f8 << j)) == (0xf8 << j))) {
- numbits--;
- bitbuf = (bitbuf & ((~0xff) << j)) | ((bitbuf & ~((~0xff) << j)) << 1);
- }
- }
- while (state && numbits >= 8) {
- if (bc->hdlcrx.bufcnt >= TXBUFFER_SIZE) {
- state = 0;
- } else {
- *(bc->hdlcrx.bufptr)++ = bitbuf >> (16-numbits);
- bc->hdlcrx.bufcnt++;
- numbits -= 8;
- }
- }
- }
- }
- bc->hdlcrx.numbits = numbits;
- bc->hdlcrx.state = state;
- bc->hdlcrx.bitstream = bitstream;
- bc->hdlcrx.bitbuf = bitbuf;
- return ret;
-}
-
-/* --------------------------------------------------------------------- */
-
-#define GETTICK(x) \
-({ \
- x = (unsigned int)get_cycles(); \
-})
-
-static void epp_bh(struct work_struct *work)
-{
- struct net_device *dev;
- struct baycom_state *bc;
- struct parport *pp;
- unsigned char stat;
- unsigned char tmp[2];
- unsigned int time1 = 0, time2 = 0, time3 = 0;
- int cnt, cnt2;
-
- bc = container_of(work, struct baycom_state, run_work.work);
- dev = bc->dev;
- if (!bc->work_running)
- return;
- baycom_int_freq(bc);
- pp = bc->pdev->port;
- /* update status */
- if (pp->ops->epp_read_addr(pp, &stat, 1, 0) != 1)
- goto epptimeout;
- bc->stat = stat;
- bc->debug_vals.last_pllcorr = stat;
- GETTICK(time1);
- if (bc->modem == EPP_FPGAEXTSTATUS) {
- /* get input count */
- tmp[0] = EPP_TX_FIFO_ENABLE|EPP_RX_FIFO_ENABLE|EPP_MODEM_ENABLE|1;
- if (pp->ops->epp_write_addr(pp, tmp, 1, 0) != 1)
- goto epptimeout;
- if (pp->ops->epp_read_addr(pp, tmp, 2, 0) != 2)
- goto epptimeout;
- cnt = tmp[0] | (tmp[1] << 8);
- cnt &= 0x7fff;
- /* get output count */
- tmp[0] = EPP_TX_FIFO_ENABLE|EPP_RX_FIFO_ENABLE|EPP_MODEM_ENABLE|2;
- if (pp->ops->epp_write_addr(pp, tmp, 1, 0) != 1)
- goto epptimeout;
- if (pp->ops->epp_read_addr(pp, tmp, 2, 0) != 2)
- goto epptimeout;
- cnt2 = tmp[0] | (tmp[1] << 8);
- cnt2 = 16384 - (cnt2 & 0x7fff);
- /* return to normal */
- tmp[0] = EPP_TX_FIFO_ENABLE|EPP_RX_FIFO_ENABLE|EPP_MODEM_ENABLE;
- if (pp->ops->epp_write_addr(pp, tmp, 1, 0) != 1)
- goto epptimeout;
- if (transmit(bc, cnt2, stat))
- goto epptimeout;
- GETTICK(time2);
- if (receive(dev, cnt))
- goto epptimeout;
- if (pp->ops->epp_read_addr(pp, &stat, 1, 0) != 1)
- goto epptimeout;
- bc->stat = stat;
- } else {
- /* try to tx */
- switch (stat & (EPP_NTAEF|EPP_NTHF)) {
- case EPP_NTHF:
- cnt = 2048 - 256;
- break;
-
- case EPP_NTAEF:
- cnt = 2048 - 1793;
- break;
-
- case 0:
- cnt = 0;
- break;
-
- default:
- cnt = 2048 - 1025;
- break;
- }
- if (transmit(bc, cnt, stat))
- goto epptimeout;
- GETTICK(time2);
- /* do receiver */
- while ((stat & (EPP_NRAEF|EPP_NRHF)) != EPP_NRHF) {
- switch (stat & (EPP_NRAEF|EPP_NRHF)) {
- case EPP_NRAEF:
- cnt = 1025;
- break;
-
- case 0:
- cnt = 1793;
- break;
-
- default:
- cnt = 256;
- break;
- }
- if (receive(dev, cnt))
- goto epptimeout;
- if (pp->ops->epp_read_addr(pp, &stat, 1, 0) != 1)
- goto epptimeout;
- }
- cnt = 0;
- if (bc->bitrate < 50000)
- cnt = 256;
- else if (bc->bitrate < 100000)
- cnt = 128;
- while (cnt > 0 && stat & EPP_NREF) {
- if (receive(dev, 1))
- goto epptimeout;
- cnt--;
- if (pp->ops->epp_read_addr(pp, &stat, 1, 0) != 1)
- goto epptimeout;
- }
- }
- GETTICK(time3);
-#ifdef BAYCOM_DEBUG
- bc->debug_vals.mod_cycles = time2 - time1;
- bc->debug_vals.demod_cycles = time3 - time2;
-#endif /* BAYCOM_DEBUG */
- schedule_delayed_work(&bc->run_work, 1);
- if (!bc->skb)
- netif_wake_queue(dev);
- return;
- epptimeout:
- printk(KERN_ERR "%s: EPP timeout!\n", bc_drvname);
-}
-
-/* ---------------------------------------------------------------------- */
-/*
- * ===================== network driver interface =========================
- */
-
-static netdev_tx_t baycom_send_packet(struct sk_buff *skb, struct net_device *dev)
-{
- struct baycom_state *bc = netdev_priv(dev);
-
- if (skb->protocol == htons(ETH_P_IP))
- return ax25_ip_xmit(skb);
-
- if (skb->data[0] != 0) {
- do_kiss_params(bc, skb->data, skb->len);
- dev_kfree_skb(skb);
- return NETDEV_TX_OK;
- }
- if (bc->skb) {
- dev_kfree_skb(skb);
- return NETDEV_TX_OK;
- }
- /* strip KISS byte */
- if (skb->len >= HDLCDRV_MAXFLEN+1 || skb->len < 3) {
- dev_kfree_skb(skb);
- return NETDEV_TX_OK;
- }
- netif_stop_queue(dev);
- bc->skb = skb;
- return NETDEV_TX_OK;
-}
-
-/* --------------------------------------------------------------------- */
-
-static int baycom_set_mac_address(struct net_device *dev, void *addr)
-{
- struct sockaddr *sa = (struct sockaddr *)addr;
-
- /* addr is an AX.25 shifted ASCII mac address */
- dev_addr_set(dev, sa->sa_data);
- return 0;
-}
-
-/* --------------------------------------------------------------------- */
-
-static void epp_wakeup(void *handle)
-{
- struct net_device *dev = (struct net_device *)handle;
- struct baycom_state *bc = netdev_priv(dev);
-
- printk(KERN_DEBUG "baycom_epp: %s: why am I being woken up?\n", dev->name);
- if (!parport_claim(bc->pdev))
- printk(KERN_DEBUG "baycom_epp: %s: I'm broken.\n", dev->name);
-}
-
-/* --------------------------------------------------------------------- */
-
-/*
- * Open/initialize the board. This is called (in the current kernel)
- * sometime after booting when the 'ifconfig' program is run.
- *
- * This routine should set everything up anew at each open, even
- * registers that "should" only need to be set once at boot, so that
- * there is non-reboot way to recover if something goes wrong.
- */
-
-static int epp_open(struct net_device *dev)
-{
- struct baycom_state *bc = netdev_priv(dev);
- struct parport *pp = parport_find_base(dev->base_addr);
- unsigned int i, j;
- unsigned char tmp[128];
- unsigned char stat;
- unsigned long tstart;
- struct pardev_cb par_cb;
-
- if (!pp) {
- printk(KERN_ERR "%s: parport at 0x%lx unknown\n", bc_drvname, dev->base_addr);
- return -ENXIO;
- }
-#if 0
- if (pp->irq < 0) {
- printk(KERN_ERR "%s: parport at 0x%lx has no irq\n", bc_drvname, pp->base);
- parport_put_port(pp);
- return -ENXIO;
- }
-#endif
- if ((~pp->modes) & (PARPORT_MODE_TRISTATE | PARPORT_MODE_PCSPP | PARPORT_MODE_SAFEININT)) {
- printk(KERN_ERR "%s: parport at 0x%lx cannot be used\n",
- bc_drvname, pp->base);
- parport_put_port(pp);
- return -EIO;
- }
- memset(&bc->modem, 0, sizeof(bc->modem));
- memset(&par_cb, 0, sizeof(par_cb));
- par_cb.wakeup = epp_wakeup;
- par_cb.private = (void *)dev;
- par_cb.flags = PARPORT_DEV_EXCL;
- for (i = 0; i < NR_PORTS; i++)
- if (baycom_device[i] == dev)
- break;
-
- if (i == NR_PORTS) {
- pr_err("%s: no device found\n", bc_drvname);
- parport_put_port(pp);
- return -ENODEV;
- }
-
- bc->pdev = parport_register_dev_model(pp, dev->name, &par_cb, i);
- parport_put_port(pp);
- if (!bc->pdev) {
- printk(KERN_ERR "%s: cannot register parport at 0x%lx\n", bc_drvname, pp->base);
- return -ENXIO;
- }
- if (parport_claim(bc->pdev)) {
- printk(KERN_ERR "%s: parport at 0x%lx busy\n", bc_drvname, pp->base);
- parport_unregister_device(bc->pdev);
- return -EBUSY;
- }
- dev->irq = /*pp->irq*/ 0;
- INIT_DELAYED_WORK(&bc->run_work, epp_bh);
- bc->work_running = 1;
- bc->modem = EPP_CONVENTIONAL;
- if (eppconfig(bc))
- printk(KERN_INFO "%s: no FPGA detected, assuming conventional EPP modem\n", bc_drvname);
- else
- bc->modem = /*EPP_FPGA*/ EPP_FPGAEXTSTATUS;
- parport_write_control(pp, LPTCTRL_PROGRAM); /* prepare EPP mode; we aren't using interrupts */
- /* reset the modem */
- tmp[0] = 0;
- tmp[1] = EPP_TX_FIFO_ENABLE|EPP_RX_FIFO_ENABLE|EPP_MODEM_ENABLE;
- if (pp->ops->epp_write_addr(pp, tmp, 2, 0) != 2)
- goto epptimeout;
- /* autoprobe baud rate */
- tstart = jiffies;
- i = 0;
- while (time_before(jiffies, tstart + HZ/3)) {
- if (pp->ops->epp_read_addr(pp, &stat, 1, 0) != 1)
- goto epptimeout;
- if ((stat & (EPP_NRAEF|EPP_NRHF)) == EPP_NRHF) {
- schedule();
- continue;
- }
- if (pp->ops->epp_read_data(pp, tmp, 128, 0) != 128)
- goto epptimeout;
- if (pp->ops->epp_read_data(pp, tmp, 128, 0) != 128)
- goto epptimeout;
- i += 256;
- }
- for (j = 0; j < 256; j++) {
- if (pp->ops->epp_read_addr(pp, &stat, 1, 0) != 1)
- goto epptimeout;
- if (!(stat & EPP_NREF))
- break;
- if (pp->ops->epp_read_data(pp, tmp, 1, 0) != 1)
- goto epptimeout;
- i++;
- }
- tstart = jiffies - tstart;
- bc->bitrate = i * (8 * HZ) / tstart;
- j = 1;
- i = bc->bitrate >> 3;
- while (j < 7 && i > 150) {
- j++;
- i >>= 1;
- }
- printk(KERN_INFO "%s: autoprobed bitrate: %d int divider: %d int rate: %d\n",
- bc_drvname, bc->bitrate, j, bc->bitrate >> (j+2));
- tmp[0] = EPP_TX_FIFO_ENABLE|EPP_RX_FIFO_ENABLE|EPP_MODEM_ENABLE/*|j*/;
- if (pp->ops->epp_write_addr(pp, tmp, 1, 0) != 1)
- goto epptimeout;
- /*
- * initialise hdlc variables
- */
- bc->hdlcrx.state = 0;
- bc->hdlcrx.numbits = 0;
- bc->hdlctx.state = tx_idle;
- bc->hdlctx.bufcnt = 0;
- bc->hdlctx.slotcnt = bc->ch_params.slottime;
- bc->hdlctx.calibrate = 0;
- /* start the bottom half stuff */
- schedule_delayed_work(&bc->run_work, 1);
- netif_start_queue(dev);
- return 0;
-
- epptimeout:
- printk(KERN_ERR "%s: epp timeout during bitrate probe\n", bc_drvname);
- parport_write_control(pp, 0); /* reset the adapter */
- parport_release(bc->pdev);
- parport_unregister_device(bc->pdev);
- return -EIO;
-}
-
-/* --------------------------------------------------------------------- */
-
-static int epp_close(struct net_device *dev)
-{
- struct baycom_state *bc = netdev_priv(dev);
- struct parport *pp = bc->pdev->port;
- unsigned char tmp[1];
-
- bc->work_running = 0;
- cancel_delayed_work_sync(&bc->run_work);
- bc->stat = EPP_DCDBIT;
- tmp[0] = 0;
- pp->ops->epp_write_addr(pp, tmp, 1, 0);
- parport_write_control(pp, 0); /* reset the adapter */
- parport_release(bc->pdev);
- parport_unregister_device(bc->pdev);
- dev_kfree_skb(bc->skb);
- bc->skb = NULL;
- printk(KERN_INFO "%s: close epp at iobase 0x%lx irq %u\n",
- bc_drvname, dev->base_addr, dev->irq);
- return 0;
-}
-
-/* --------------------------------------------------------------------- */
-
-static int baycom_setmode(struct baycom_state *bc, const char *modestr)
-{
- const char *cp;
-
- if (strstr(modestr,"intclk"))
- bc->cfg.intclk = 1;
- if (strstr(modestr,"extclk"))
- bc->cfg.intclk = 0;
- if (strstr(modestr,"intmodem"))
- bc->cfg.extmodem = 0;
- if (strstr(modestr,"extmodem"))
- bc->cfg.extmodem = 1;
- if (strstr(modestr,"loopback"))
- bc->cfg.loopback = 1;
- if (strstr(modestr, "noloopback"))
- bc->cfg.loopback = 0;
- if ((cp = strstr(modestr,"fclk="))) {
- bc->cfg.fclk = simple_strtoul(cp+5, NULL, 0);
- if (bc->cfg.fclk < 1000000)
- bc->cfg.fclk = 1000000;
- if (bc->cfg.fclk > 25000000)
- bc->cfg.fclk = 25000000;
- }
- if ((cp = strstr(modestr,"bps="))) {
- bc->cfg.bps = simple_strtoul(cp+4, NULL, 0);
- if (bc->cfg.bps < 1000)
- bc->cfg.bps = 1000;
- if (bc->cfg.bps > 1500000)
- bc->cfg.bps = 1500000;
- }
- return 0;
-}
-
-/* --------------------------------------------------------------------- */
-
-static int baycom_siocdevprivate(struct net_device *dev, struct ifreq *ifr,
- void __user *data, int cmd)
-{
- struct baycom_state *bc = netdev_priv(dev);
- struct hdlcdrv_ioctl hi;
-
- if (cmd != SIOCDEVPRIVATE)
- return -ENOIOCTLCMD;
-
- if (copy_from_user(&hi, data, sizeof(hi)))
- return -EFAULT;
- switch (hi.cmd) {
- default:
- return -ENOIOCTLCMD;
-
- case HDLCDRVCTL_GETCHANNELPAR:
- hi.data.cp.tx_delay = bc->ch_params.tx_delay;
- hi.data.cp.tx_tail = bc->ch_params.tx_tail;
- hi.data.cp.slottime = bc->ch_params.slottime;
- hi.data.cp.ppersist = bc->ch_params.ppersist;
- hi.data.cp.fulldup = bc->ch_params.fulldup;
- break;
-
- case HDLCDRVCTL_SETCHANNELPAR:
- if (!capable(CAP_NET_ADMIN))
- return -EACCES;
- bc->ch_params.tx_delay = hi.data.cp.tx_delay;
- bc->ch_params.tx_tail = hi.data.cp.tx_tail;
- bc->ch_params.slottime = hi.data.cp.slottime;
- bc->ch_params.ppersist = hi.data.cp.ppersist;
- bc->ch_params.fulldup = hi.data.cp.fulldup;
- bc->hdlctx.slotcnt = 1;
- return 0;
-
- case HDLCDRVCTL_GETMODEMPAR:
- hi.data.mp.iobase = dev->base_addr;
- hi.data.mp.irq = dev->irq;
- hi.data.mp.dma = dev->dma;
- hi.data.mp.dma2 = 0;
- hi.data.mp.seriobase = 0;
- hi.data.mp.pariobase = 0;
- hi.data.mp.midiiobase = 0;
- break;
-
- case HDLCDRVCTL_SETMODEMPAR:
- if ((!capable(CAP_SYS_RAWIO)) || netif_running(dev))
- return -EACCES;
- dev->base_addr = hi.data.mp.iobase;
- dev->irq = /*hi.data.mp.irq*/0;
- dev->dma = /*hi.data.mp.dma*/0;
- return 0;
-
- case HDLCDRVCTL_GETSTAT:
- hi.data.cs.ptt = !!(bc->stat & EPP_PTTBIT);
- hi.data.cs.dcd = !(bc->stat & EPP_DCDBIT);
- hi.data.cs.ptt_keyed = bc->ptt_keyed;
- hi.data.cs.tx_packets = dev->stats.tx_packets;
- hi.data.cs.tx_errors = dev->stats.tx_errors;
- hi.data.cs.rx_packets = dev->stats.rx_packets;
- hi.data.cs.rx_errors = dev->stats.rx_errors;
- break;
-
- case HDLCDRVCTL_OLDGETSTAT:
- hi.data.ocs.ptt = !!(bc->stat & EPP_PTTBIT);
- hi.data.ocs.dcd = !(bc->stat & EPP_DCDBIT);
- hi.data.ocs.ptt_keyed = bc->ptt_keyed;
- break;
-
- case HDLCDRVCTL_CALIBRATE:
- if (!capable(CAP_SYS_RAWIO))
- return -EACCES;
- bc->hdlctx.calibrate = hi.data.calibrate * bc->bitrate / 8;
- return 0;
-
- case HDLCDRVCTL_DRIVERNAME:
- strscpy_pad(hi.data.drivername, "baycom_epp");
- break;
-
- case HDLCDRVCTL_GETMODE:
- sprintf(hi.data.modename, "%sclk,%smodem,fclk=%d,bps=%d%s",
- bc->cfg.intclk ? "int" : "ext",
- bc->cfg.extmodem ? "ext" : "int", bc->cfg.fclk, bc->cfg.bps,
- bc->cfg.loopback ? ",loopback" : "");
- break;
-
- case HDLCDRVCTL_SETMODE:
- if (!capable(CAP_NET_ADMIN) || netif_running(dev))
- return -EACCES;
- hi.data.modename[sizeof(hi.data.modename)-1] = '\0';
- return baycom_setmode(bc, hi.data.modename);
-
- case HDLCDRVCTL_MODELIST:
- strscpy_pad(hi.data.modename, "intclk,extclk,intmodem,extmodem,divider=x");
- break;
-
- case HDLCDRVCTL_MODEMPARMASK:
- return HDLCDRV_PARMASK_IOBASE;
-
- }
- if (copy_to_user(data, &hi, sizeof(hi)))
- return -EFAULT;
- return 0;
-}
-
-/* --------------------------------------------------------------------- */
-
-static const struct net_device_ops baycom_netdev_ops = {
- .ndo_open = epp_open,
- .ndo_stop = epp_close,
- .ndo_siocdevprivate = baycom_siocdevprivate,
- .ndo_start_xmit = baycom_send_packet,
- .ndo_set_mac_address = baycom_set_mac_address,
-};
-
-/*
- * Check for a network adaptor of this type, and return '0' if one exists.
- * If dev->base_addr == 0, probe all likely locations.
- * If dev->base_addr == 1, always return failure.
- * If dev->base_addr == 2, allocate space for the device and return success
- * (detachable devices only).
- */
-static void baycom_probe(struct net_device *dev)
-{
- const struct hdlcdrv_channel_params dflt_ch_params = {
- 20, 2, 10, 40, 0
- };
- struct baycom_state *bc;
-
- /*
- * not a real probe! only initialize data structures
- */
- bc = netdev_priv(dev);
- /*
- * initialize the baycom_state struct
- */
- bc->ch_params = dflt_ch_params;
- bc->ptt_keyed = 0;
-
- /*
- * initialize the device struct
- */
-
- /* Fill in the fields of the device structure */
- bc->skb = NULL;
-
- dev->netdev_ops = &baycom_netdev_ops;
- dev->header_ops = &ax25_header_ops;
-
- dev->type = ARPHRD_AX25; /* AF_AX25 device */
- dev->hard_header_len = AX25_MAX_HEADER_LEN + AX25_BPQ_HEADER_LEN;
- dev->mtu = AX25_DEF_PACLEN; /* eth_mtu is the default */
- dev->addr_len = AX25_ADDR_LEN; /* sizeof an ax.25 address */
- memcpy(dev->broadcast, &ax25_bcast, AX25_ADDR_LEN);
- dev_addr_set(dev, (u8 *)&null_ax25_address);
- dev->tx_queue_len = 16;
-
- /* New style flags */
- dev->flags = 0;
-}
-
-/* --------------------------------------------------------------------- */
-
-/*
- * command line settable parameters
- */
-static char *mode[NR_PORTS] = { "", };
-static int iobase[NR_PORTS] = { 0x378, };
-
-module_param_array(mode, charp, NULL, 0);
-MODULE_PARM_DESC(mode, "baycom operating mode");
-module_param_hw_array(iobase, int, ioport, NULL, 0);
-MODULE_PARM_DESC(iobase, "baycom io base address");
-
-MODULE_AUTHOR("Thomas M. Sailer, sailer@ife.ee.ethz.ch, hb9jnx@hb9w.che.eu");
-MODULE_DESCRIPTION("Baycom epp amateur radio modem driver");
-MODULE_LICENSE("GPL");
-
-/* --------------------------------------------------------------------- */
-
-static int baycom_epp_par_probe(struct pardevice *par_dev)
-{
- struct device_driver *drv = par_dev->dev.driver;
- int len = strlen(drv->name);
-
- if (strncmp(par_dev->name, drv->name, len))
- return -ENODEV;
-
- return 0;
-}
-
-static struct parport_driver baycom_epp_par_driver = {
- .name = "bce",
- .probe = baycom_epp_par_probe,
-};
-
-static void __init baycom_epp_dev_setup(struct net_device *dev)
-{
- struct baycom_state *bc = netdev_priv(dev);
-
- /*
- * initialize part of the baycom_state struct
- */
- bc->dev = dev;
- bc->magic = BAYCOM_MAGIC;
- bc->cfg.fclk = 19666600;
- bc->cfg.bps = 9600;
- /*
- * initialize part of the device struct
- */
- baycom_probe(dev);
-}
-
-static int __init init_baycomepp(void)
-{
- int i, found = 0, ret;
- char set_hw = 1;
-
- printk(bc_drvinfo);
-
- ret = parport_register_driver(&baycom_epp_par_driver);
- if (ret)
- return ret;
-
- /*
- * register net devices
- */
- for (i = 0; i < NR_PORTS; i++) {
- struct net_device *dev;
-
- dev = alloc_netdev(sizeof(struct baycom_state), "bce%d",
- NET_NAME_UNKNOWN, baycom_epp_dev_setup);
-
- if (!dev) {
- printk(KERN_WARNING "bce%d : out of memory\n", i);
- return found ? 0 : -ENOMEM;
- }
-
- sprintf(dev->name, "bce%d", i);
- dev->base_addr = iobase[i];
-
- if (!mode[i])
- set_hw = 0;
- if (!set_hw)
- iobase[i] = 0;
-
- if (register_netdev(dev)) {
- printk(KERN_WARNING "%s: cannot register net device %s\n", bc_drvname, dev->name);
- free_netdev(dev);
- break;
- }
- if (set_hw && baycom_setmode(netdev_priv(dev), mode[i]))
- set_hw = 0;
- baycom_device[i] = dev;
- found++;
- }
-
- if (found == 0) {
- parport_unregister_driver(&baycom_epp_par_driver);
- return -ENXIO;
- }
-
- return 0;
-}
-
-static void __exit cleanup_baycomepp(void)
-{
- int i;
-
- for(i = 0; i < NR_PORTS; i++) {
- struct net_device *dev = baycom_device[i];
-
- if (dev) {
- struct baycom_state *bc = netdev_priv(dev);
- if (bc->magic == BAYCOM_MAGIC) {
- unregister_netdev(dev);
- free_netdev(dev);
- } else
- printk(paranoia_str, "cleanup_module");
- }
- }
- parport_unregister_driver(&baycom_epp_par_driver);
-}
-
-module_init(init_baycomepp);
-module_exit(cleanup_baycomepp);
-
-/* --------------------------------------------------------------------- */
-
-#ifndef MODULE
-
-/*
- * format: baycom_epp=io,mode
- * mode: fpga config options
- */
-
-static int __init baycom_epp_setup(char *str)
-{
- static unsigned __initdata nr_dev = 0;
- int ints[2];
-
- if (nr_dev >= NR_PORTS)
- return 0;
- str = get_options(str, 2, ints);
- if (ints[0] < 1)
- return 0;
- mode[nr_dev] = str;
- iobase[nr_dev] = ints[1];
- nr_dev++;
- return 1;
-}
-
-__setup("baycom_epp=", baycom_epp_setup);
-
-#endif /* MODULE */
-/* --------------------------------------------------------------------- */
+++ /dev/null
-// SPDX-License-Identifier: GPL-2.0-or-later
-/*****************************************************************************/
-
-/*
- * baycom_par.c -- baycom par96 and picpar radio modem driver.
- *
- * Copyright (C) 1996-2000 Thomas Sailer (sailer@ife.ee.ethz.ch)
- *
- * Please note that the GPL allows you to use the driver, NOT the radio.
- * In order to use the radio, you need a license from the communications
- * authority of your country.
- *
- * Supported modems
- *
- * par96: This is a modem for 9600 baud FSK compatible to the G3RUH standard.
- * The modem does all the filtering and regenerates the receiver clock.
- * Data is transferred from and to the PC via a shift register.
- * The shift register is filled with 16 bits and an interrupt is
- * signalled. The PC then empties the shift register in a burst. This
- * modem connects to the parallel port, hence the name. The modem
- * leaves the implementation of the HDLC protocol and the scrambler
- * polynomial to the PC. This modem is no longer available (at least
- * from Baycom) and has been replaced by the PICPAR modem (see below).
- * You may however still build one from the schematics published in
- * cq-DL :-).
- *
- * picpar: This is a redesign of the par96 modem by Henning Rech, DF9IC. The
- * modem is protocol compatible to par96, but uses only three low
- * power ICs and can therefore be fed from the parallel port and
- * does not require an additional power supply. It features
- * built in DCD circuitry. The driver should therefore be configured
- * for hardware DCD.
- *
- * Command line options (insmod command line)
- *
- * mode driver mode string. Valid choices are par96 and picpar.
- * iobase base address of the port; common values are 0x378, 0x278, 0x3bc
- *
- * History:
- * 0.1 26.06.1996 Adapted from baycom.c and made network driver interface
- * 18.10.1996 Changed to new user space access routines (copy_{to,from}_user)
- * 0.3 26.04.1997 init code/data tagged
- * 0.4 08.07.1997 alternative ser12 decoding algorithm (uses delta CTS ints)
- * 0.5 11.11.1997 split into separate files for ser12/par96
- * 0.6 03.08.1999 adapt to Linus' new __setup/__initcall
- * removed some pre-2.2 kernel compatibility cruft
- * 0.7 10.08.1999 Check if parport can do SPP and is safe to access during interrupt contexts
- * 0.8 12.02.2000 adapted to softnet driver interface
- * removed direct parport access, uses parport driver methods
- * 0.9 03.07.2000 fix interface name handling
- */
-
-/*****************************************************************************/
-
-#include <linux/module.h>
-#include <linux/kernel.h>
-#include <linux/types.h>
-#include <linux/fcntl.h>
-#include <linux/interrupt.h>
-#include <linux/ioport.h>
-#include <linux/in.h>
-#include <linux/string.h>
-#include <linux/init.h>
-#include <linux/delay.h>
-#include <linux/errno.h>
-#include <linux/netdevice.h>
-#include <linux/hdlcdrv.h>
-#include <linux/baycom.h>
-#include <linux/parport.h>
-#include <linux/bitops.h>
-#include <linux/jiffies.h>
-
-#include <linux/uaccess.h>
-
-/* --------------------------------------------------------------------- */
-
-#define BAYCOM_DEBUG
-
-/*
- * modem options; bit mask
- */
-#define BAYCOM_OPTIONS_SOFTDCD 1
-
-/* --------------------------------------------------------------------- */
-
-static const char bc_drvname[] = "baycom_par";
-static const char bc_drvinfo[] = KERN_INFO "baycom_par: (C) 1996-2000 Thomas Sailer, HB9JNX/AE4WA\n"
-"baycom_par: version 0.9\n";
-
-/* --------------------------------------------------------------------- */
-
-#define NR_PORTS 4
-
-static struct net_device *baycom_device[NR_PORTS];
-
-/* --------------------------------------------------------------------- */
-
-#define PAR96_BURSTBITS 16
-#define PAR96_BURST 4
-#define PAR96_PTT 2
-#define PAR96_TXBIT 1
-#define PAR96_ACK 0x40
-#define PAR96_RXBIT 0x20
-#define PAR96_DCD 0x10
-#define PAR97_POWER 0xf8
-
-/* ---------------------------------------------------------------------- */
-/*
- * Information that need to be kept for each board.
- */
-
-struct baycom_state {
- struct hdlcdrv_state hdrv;
-
- struct pardevice *pdev;
- unsigned int options;
-
- struct modem_state {
- short arb_divider;
- unsigned char flags;
- unsigned int shreg;
- struct modem_state_par96 {
- int dcd_count;
- unsigned int dcd_shreg;
- unsigned long descram;
- unsigned long scram;
- } par96;
- } modem;
-
-#ifdef BAYCOM_DEBUG
- struct debug_vals {
- unsigned long last_jiffies;
- unsigned cur_intcnt;
- unsigned last_intcnt;
- int cur_pllcorr;
- int last_pllcorr;
- } debug_vals;
-#endif /* BAYCOM_DEBUG */
-};
-
-/* --------------------------------------------------------------------- */
-
-static inline void baycom_int_freq(struct baycom_state *bc)
-{
-#ifdef BAYCOM_DEBUG
- unsigned long cur_jiffies = jiffies;
- /*
- * measure the interrupt frequency
- */
- bc->debug_vals.cur_intcnt++;
- if (time_after_eq(cur_jiffies, bc->debug_vals.last_jiffies + HZ)) {
- bc->debug_vals.last_jiffies = cur_jiffies;
- bc->debug_vals.last_intcnt = bc->debug_vals.cur_intcnt;
- bc->debug_vals.cur_intcnt = 0;
- bc->debug_vals.last_pllcorr = bc->debug_vals.cur_pllcorr;
- bc->debug_vals.cur_pllcorr = 0;
- }
-#endif /* BAYCOM_DEBUG */
-}
-
-/* --------------------------------------------------------------------- */
-/*
- * ===================== PAR96 specific routines =========================
- */
-
-#define PAR96_DESCRAM_TAP1 0x20000
-#define PAR96_DESCRAM_TAP2 0x01000
-#define PAR96_DESCRAM_TAP3 0x00001
-
-#define PAR96_DESCRAM_TAPSH1 17
-#define PAR96_DESCRAM_TAPSH2 12
-#define PAR96_DESCRAM_TAPSH3 0
-
-#define PAR96_SCRAM_TAP1 0x20000 /* X^17 */
-#define PAR96_SCRAM_TAPN 0x00021 /* X^0+X^5 */
-
-/* --------------------------------------------------------------------- */
-
-static inline void par96_tx(struct net_device *dev, struct baycom_state *bc)
-{
- int i;
- unsigned int data = hdlcdrv_getbits(&bc->hdrv);
- struct parport *pp = bc->pdev->port;
-
- for(i = 0; i < PAR96_BURSTBITS; i++, data >>= 1) {
- unsigned char val = PAR97_POWER;
- bc->modem.par96.scram = ((bc->modem.par96.scram << 1) |
- (bc->modem.par96.scram & 1));
- if (!(data & 1))
- bc->modem.par96.scram ^= 1;
- if (bc->modem.par96.scram & (PAR96_SCRAM_TAP1 << 1))
- bc->modem.par96.scram ^=
- (PAR96_SCRAM_TAPN << 1);
- if (bc->modem.par96.scram & (PAR96_SCRAM_TAP1 << 2))
- val |= PAR96_TXBIT;
- pp->ops->write_data(pp, val);
- pp->ops->write_data(pp, val | PAR96_BURST);
- }
-}
-
-/* --------------------------------------------------------------------- */
-
-static inline void par96_rx(struct net_device *dev, struct baycom_state *bc)
-{
- int i;
- unsigned int data, mask, mask2, descx;
- struct parport *pp = bc->pdev->port;
-
- /*
- * do receiver; differential decode and descramble on the fly
- */
- for(data = i = 0; i < PAR96_BURSTBITS; i++) {
- bc->modem.par96.descram = (bc->modem.par96.descram << 1);
- if (pp->ops->read_status(pp) & PAR96_RXBIT)
- bc->modem.par96.descram |= 1;
- descx = bc->modem.par96.descram ^
- (bc->modem.par96.descram >> 1);
- /* now the diff decoded data is inverted in descram */
- pp->ops->write_data(pp, PAR97_POWER | PAR96_PTT);
- descx ^= ((descx >> PAR96_DESCRAM_TAPSH1) ^
- (descx >> PAR96_DESCRAM_TAPSH2));
- data >>= 1;
- if (!(descx & 1))
- data |= 0x8000;
- pp->ops->write_data(pp, PAR97_POWER | PAR96_PTT | PAR96_BURST);
- }
- hdlcdrv_putbits(&bc->hdrv, data);
- /*
- * do DCD algorithm
- */
- if (bc->options & BAYCOM_OPTIONS_SOFTDCD) {
- bc->modem.par96.dcd_shreg = (bc->modem.par96.dcd_shreg >> 16)
- | (data << 16);
- /* search for flags and set the dcd counter appropriately */
- for(mask = 0x1fe00, mask2 = 0xfc00, i = 0;
- i < PAR96_BURSTBITS; i++, mask <<= 1, mask2 <<= 1)
- if ((bc->modem.par96.dcd_shreg & mask) == mask2)
- bc->modem.par96.dcd_count = HDLCDRV_MAXFLEN+4;
- /* check for abort/noise sequences */
- for(mask = 0x1fe00, mask2 = 0x1fe00, i = 0;
- i < PAR96_BURSTBITS; i++, mask <<= 1, mask2 <<= 1)
- if (((bc->modem.par96.dcd_shreg & mask) == mask2) &&
- (bc->modem.par96.dcd_count >= 0))
- bc->modem.par96.dcd_count -= HDLCDRV_MAXFLEN-10;
- /* decrement and set the dcd variable */
- if (bc->modem.par96.dcd_count >= 0)
- bc->modem.par96.dcd_count -= 2;
- hdlcdrv_setdcd(&bc->hdrv, bc->modem.par96.dcd_count > 0);
- } else {
- hdlcdrv_setdcd(&bc->hdrv, !!(pp->ops->read_status(pp) & PAR96_DCD));
- }
-}
-
-/* --------------------------------------------------------------------- */
-
-static void par96_interrupt(void *dev_id)
-{
- struct net_device *dev = dev_id;
- struct baycom_state *bc = netdev_priv(dev);
-
- baycom_int_freq(bc);
- /*
- * check if transmitter active
- */
- if (hdlcdrv_ptt(&bc->hdrv))
- par96_tx(dev, bc);
- else {
- par96_rx(dev, bc);
- if (--bc->modem.arb_divider <= 0) {
- bc->modem.arb_divider = 6;
- local_irq_enable();
- hdlcdrv_arbitrate(dev, &bc->hdrv);
- }
- }
- local_irq_enable();
- hdlcdrv_transmitter(dev, &bc->hdrv);
- hdlcdrv_receiver(dev, &bc->hdrv);
- local_irq_disable();
-}
-
-/* --------------------------------------------------------------------- */
-
-static void par96_wakeup(void *handle)
-{
- struct net_device *dev = (struct net_device *)handle;
- struct baycom_state *bc = netdev_priv(dev);
-
- printk(KERN_DEBUG "baycom_par: %s: why am I being woken up?\n", dev->name);
- if (!parport_claim(bc->pdev))
- printk(KERN_DEBUG "baycom_par: %s: I'm broken.\n", dev->name);
-}
-
-/* --------------------------------------------------------------------- */
-
-static int par96_open(struct net_device *dev)
-{
- struct baycom_state *bc = netdev_priv(dev);
- struct pardev_cb par_cb;
- struct parport *pp;
- int i;
-
- if (!dev || !bc)
- return -ENXIO;
- pp = parport_find_base(dev->base_addr);
- if (!pp) {
- printk(KERN_ERR "baycom_par: parport at 0x%lx unknown\n", dev->base_addr);
- return -ENXIO;
- }
- if (pp->irq < 0) {
- printk(KERN_ERR "baycom_par: parport at 0x%lx has no irq\n", pp->base);
- parport_put_port(pp);
- return -ENXIO;
- }
- if ((~pp->modes) & (PARPORT_MODE_PCSPP | PARPORT_MODE_SAFEININT)) {
- printk(KERN_ERR "baycom_par: parport at 0x%lx cannot be used\n", pp->base);
- parport_put_port(pp);
- return -ENXIO;
- }
- memset(&bc->modem, 0, sizeof(bc->modem));
- bc->hdrv.par.bitrate = 9600;
- memset(&par_cb, 0, sizeof(par_cb));
- par_cb.wakeup = par96_wakeup;
- par_cb.irq_func = par96_interrupt;
- par_cb.private = (void *)dev;
- par_cb.flags = PARPORT_DEV_EXCL;
- for (i = 0; i < NR_PORTS; i++)
- if (baycom_device[i] == dev)
- break;
-
- if (i == NR_PORTS) {
- pr_err("%s: no device found\n", bc_drvname);
- parport_put_port(pp);
- return -ENODEV;
- }
- bc->pdev = parport_register_dev_model(pp, dev->name, &par_cb, i);
- parport_put_port(pp);
- if (!bc->pdev) {
- printk(KERN_ERR "baycom_par: cannot register parport at 0x%lx\n", dev->base_addr);
- return -ENXIO;
- }
- if (parport_claim(bc->pdev)) {
- printk(KERN_ERR "baycom_par: parport at 0x%lx busy\n", pp->base);
- parport_unregister_device(bc->pdev);
- return -EBUSY;
- }
- pp = bc->pdev->port;
- dev->irq = pp->irq;
- pp->ops->data_forward(pp);
- bc->hdrv.par.bitrate = 9600;
- pp->ops->write_data(pp, PAR96_PTT | PAR97_POWER); /* switch off PTT */
- pp->ops->enable_irq(pp);
- printk(KERN_INFO "%s: par96 at iobase 0x%lx irq %u options 0x%x\n",
- bc_drvname, dev->base_addr, dev->irq, bc->options);
- return 0;
-}
-
-/* --------------------------------------------------------------------- */
-
-static int par96_close(struct net_device *dev)
-{
- struct baycom_state *bc = netdev_priv(dev);
- struct parport *pp;
-
- if (!dev || !bc)
- return -EINVAL;
- pp = bc->pdev->port;
- /* disable interrupt */
- pp->ops->disable_irq(pp);
- /* switch off PTT */
- pp->ops->write_data(pp, PAR96_PTT | PAR97_POWER);
- parport_release(bc->pdev);
- parport_unregister_device(bc->pdev);
- printk(KERN_INFO "%s: close par96 at iobase 0x%lx irq %u\n",
- bc_drvname, dev->base_addr, dev->irq);
- return 0;
-}
-
-/* --------------------------------------------------------------------- */
-/*
- * ===================== hdlcdrv driver interface =========================
- */
-
-static int baycom_ioctl(struct net_device *dev, void __user *data,
- struct hdlcdrv_ioctl *hi, int cmd);
-
-/* --------------------------------------------------------------------- */
-
-static const struct hdlcdrv_ops par96_ops = {
- .drvname = bc_drvname,
- .drvinfo = bc_drvinfo,
- .open = par96_open,
- .close = par96_close,
- .ioctl = baycom_ioctl
-};
-
-/* --------------------------------------------------------------------- */
-
-static int baycom_setmode(struct baycom_state *bc, const char *modestr)
-{
- if (!strncmp(modestr, "picpar", 6))
- bc->options = 0;
- else if (!strncmp(modestr, "par96", 5))
- bc->options = BAYCOM_OPTIONS_SOFTDCD;
- else
- bc->options = !!strchr(modestr, '*');
- return 0;
-}
-
-/* --------------------------------------------------------------------- */
-
-static int baycom_ioctl(struct net_device *dev, void __user *data,
- struct hdlcdrv_ioctl *hi, int cmd)
-{
- struct baycom_state *bc;
- struct baycom_ioctl bi;
-
- if (!dev)
- return -EINVAL;
-
- bc = netdev_priv(dev);
- BUG_ON(bc->hdrv.magic != HDLCDRV_MAGIC);
-
- if (cmd != SIOCDEVPRIVATE)
- return -ENOIOCTLCMD;
- switch (hi->cmd) {
- default:
- break;
-
- case HDLCDRVCTL_GETMODE:
- strscpy(hi->data.modename, bc->options ? "par96" : "picpar");
- if (copy_to_user(data, hi, sizeof(struct hdlcdrv_ioctl)))
- return -EFAULT;
- return 0;
-
- case HDLCDRVCTL_SETMODE:
- if (netif_running(dev) || !capable(CAP_NET_ADMIN))
- return -EACCES;
- hi->data.modename[sizeof(hi->data.modename)-1] = '\0';
- return baycom_setmode(bc, hi->data.modename);
-
- case HDLCDRVCTL_MODELIST:
- strscpy(hi->data.modename, "par96,picpar");
- if (copy_to_user(data, hi, sizeof(struct hdlcdrv_ioctl)))
- return -EFAULT;
- return 0;
-
- case HDLCDRVCTL_MODEMPARMASK:
- return HDLCDRV_PARMASK_IOBASE;
-
- }
-
- if (copy_from_user(&bi, data, sizeof(bi)))
- return -EFAULT;
- switch (bi.cmd) {
- default:
- return -ENOIOCTLCMD;
-
-#ifdef BAYCOM_DEBUG
- case BAYCOMCTL_GETDEBUG:
- bi.data.dbg.debug1 = bc->hdrv.ptt_keyed;
- bi.data.dbg.debug2 = bc->debug_vals.last_intcnt;
- bi.data.dbg.debug3 = bc->debug_vals.last_pllcorr;
- break;
-#endif /* BAYCOM_DEBUG */
-
- }
- if (copy_to_user(data, &bi, sizeof(bi)))
- return -EFAULT;
- return 0;
-
-}
-
-/* --------------------------------------------------------------------- */
-
-/*
- * command line settable parameters
- */
-static char *mode[NR_PORTS] = { "picpar", };
-static int iobase[NR_PORTS] = { 0x378, };
-
-module_param_array(mode, charp, NULL, 0);
-MODULE_PARM_DESC(mode, "baycom operating mode; eg. par96 or picpar");
-module_param_hw_array(iobase, int, ioport, NULL, 0);
-MODULE_PARM_DESC(iobase, "baycom io base address");
-
-MODULE_AUTHOR("Thomas M. Sailer, sailer@ife.ee.ethz.ch, hb9jnx@hb9w.che.eu");
-MODULE_DESCRIPTION("Baycom par96 and picpar amateur radio modem driver");
-MODULE_LICENSE("GPL");
-
-/* --------------------------------------------------------------------- */
-
-static int baycom_par_probe(struct pardevice *par_dev)
-{
- struct device_driver *drv = par_dev->dev.driver;
- int len = strlen(drv->name);
-
- if (strncmp(par_dev->name, drv->name, len))
- return -ENODEV;
-
- return 0;
-}
-
-static struct parport_driver baycom_par_driver = {
- .name = "bcp",
- .probe = baycom_par_probe,
-};
-
-static int __init init_baycompar(void)
-{
- int i, found = 0, ret;
- char set_hw = 1;
-
- printk(bc_drvinfo);
-
- ret = parport_register_driver(&baycom_par_driver);
- if (ret)
- return ret;
-
- /*
- * register net devices
- */
- for (i = 0; i < NR_PORTS; i++) {
- struct net_device *dev;
- struct baycom_state *bc;
- char ifname[IFNAMSIZ];
-
- sprintf(ifname, "bcp%d", i);
-
- if (!mode[i])
- set_hw = 0;
- if (!set_hw)
- iobase[i] = 0;
-
- dev = hdlcdrv_register(&par96_ops,
- sizeof(struct baycom_state),
- ifname, iobase[i], 0, 0);
- if (IS_ERR(dev))
- break;
-
- bc = netdev_priv(dev);
- if (set_hw && baycom_setmode(bc, mode[i]))
- set_hw = 0;
- found++;
- baycom_device[i] = dev;
- }
-
- if (!found) {
- parport_unregister_driver(&baycom_par_driver);
- return -ENXIO;
- }
- return 0;
-}
-
-static void __exit cleanup_baycompar(void)
-{
- int i;
-
- for(i = 0; i < NR_PORTS; i++) {
- struct net_device *dev = baycom_device[i];
-
- if (dev)
- hdlcdrv_unregister(dev);
- }
- parport_unregister_driver(&baycom_par_driver);
-}
-
-module_init(init_baycompar);
-module_exit(cleanup_baycompar);
-
-/* --------------------------------------------------------------------- */
-
-#ifndef MODULE
-
-/*
- * format: baycom_par=io,mode
- * mode: par96,picpar
- */
-
-static int __init baycom_par_setup(char *str)
-{
- static unsigned nr_dev;
- int ints[2];
-
- if (nr_dev >= NR_PORTS)
- return 0;
- str = get_options(str, 2, ints);
- if (ints[0] < 1)
- return 0;
- mode[nr_dev] = str;
- iobase[nr_dev] = ints[1];
- nr_dev++;
- return 1;
-}
-
-__setup("baycom_par=", baycom_par_setup);
-
-#endif /* MODULE */
-/* --------------------------------------------------------------------- */
+++ /dev/null
-// SPDX-License-Identifier: GPL-2.0-or-later
-/*****************************************************************************/
-
-/*
- * baycom_ser_fdx.c -- baycom ser12 fullduplex radio modem driver.
- *
- * Copyright (C) 1996-2000 Thomas Sailer (sailer@ife.ee.ethz.ch)
- *
- * Please note that the GPL allows you to use the driver, NOT the radio.
- * In order to use the radio, you need a license from the communications
- * authority of your country.
- *
- * Supported modems
- *
- * ser12: This is a very simple 1200 baud AFSK modem. The modem consists only
- * of a modulator/demodulator chip, usually a TI TCM3105. The computer
- * is responsible for regenerating the receiver bit clock, as well as
- * for handling the HDLC protocol. The modem connects to a serial port,
- * hence the name. Since the serial port is not used as an async serial
- * port, the kernel driver for serial ports cannot be used, and this
- * driver only supports standard serial hardware (8250, 16450, 16550A)
- *
- * This modem usually draws its supply current out of the otherwise unused
- * TXD pin of the serial port. Thus a contiguous stream of 0x00-bytes
- * is transmitted to achieve a positive supply voltage.
- *
- * hsk: This is a 4800 baud FSK modem, designed for TNC use. It works fine
- * in 'baycom-mode' :-) In contrast to the TCM3105 modem, power is
- * externally supplied. So there's no need to provide the 0x00-byte-stream
- * when receiving or idle, which drastically reduces interrupt load.
- *
- * Command line options (insmod command line)
- *
- * mode ser# hardware DCD
- * ser#* software DCD
- * ser#+ hardware DCD, inverted signal at DCD pin
- * '#' denotes the baud rate / 100, eg. ser12* is '1200 baud, soft DCD'
- * iobase base address of the port; common values are 0x3f8, 0x2f8, 0x3e8, 0x2e8
- * baud baud rate (between 300 and 4800)
- * irq interrupt line of the port; common values are 4,3
- *
- * History:
- * 0.1 26.06.1996 Adapted from baycom.c and made network driver interface
- * 18.10.1996 Changed to new user space access routines (copy_{to,from}_user)
- * 0.3 26.04.1997 init code/data tagged
- * 0.4 08.07.1997 alternative ser12 decoding algorithm (uses delta CTS ints)
- * 0.5 11.11.1997 ser12/par96 split into separate files
- * 0.6 24.01.1998 Thorsten Kranzkowski, dl8bcu and Thomas Sailer:
- * reduced interrupt load in transmit case
- * reworked receiver
- * 0.7 03.08.1999 adapt to Linus' new __setup/__initcall
- * 0.8 10.08.1999 use module_init/module_exit
- * 0.9 12.02.2000 adapted to softnet driver interface
- * 0.10 03.07.2000 fix interface name handling
- */
-
-/*****************************************************************************/
-
-#include <linux/capability.h>
-#include <linux/module.h>
-#include <linux/ioport.h>
-#include <linux/string.h>
-#include <linux/init.h>
-#include <linux/interrupt.h>
-#include <linux/hdlcdrv.h>
-#include <linux/baycom.h>
-#include <linux/jiffies.h>
-#include <linux/time64.h>
-
-#include <linux/uaccess.h>
-#include <asm/io.h>
-#include <asm/irq.h>
-
-/* --------------------------------------------------------------------- */
-
-#define BAYCOM_DEBUG
-
-/* --------------------------------------------------------------------- */
-
-static const char bc_drvname[] = "baycom_ser_fdx";
-static const char bc_drvinfo[] = KERN_INFO "baycom_ser_fdx: (C) 1996-2000 Thomas Sailer, HB9JNX/AE4WA\n"
-"baycom_ser_fdx: version 0.10\n";
-
-/* --------------------------------------------------------------------- */
-
-#define NR_PORTS 4
-
-static struct net_device *baycom_device[NR_PORTS];
-
-/* --------------------------------------------------------------------- */
-
-#define RBR(iobase) (iobase+0)
-#define THR(iobase) (iobase+0)
-#define IER(iobase) (iobase+1)
-#define IIR(iobase) (iobase+2)
-#define FCR(iobase) (iobase+2)
-#define LCR(iobase) (iobase+3)
-#define MCR(iobase) (iobase+4)
-#define LSR(iobase) (iobase+5)
-#define MSR(iobase) (iobase+6)
-#define SCR(iobase) (iobase+7)
-#define DLL(iobase) (iobase+0)
-#define DLM(iobase) (iobase+1)
-
-#define SER12_EXTENT 8
-
-/* ---------------------------------------------------------------------- */
-/*
- * Information that need to be kept for each board.
- */
-
-struct baycom_state {
- struct hdlcdrv_state hdrv;
-
- unsigned int baud, baud_us, baud_arbdiv, baud_uartdiv, baud_dcdtimeout;
- int opt_dcd;
-
- struct modem_state {
- unsigned char flags;
- unsigned char ptt;
- unsigned int shreg;
- struct modem_state_ser12 {
- unsigned char tx_bit;
- unsigned char last_rxbit;
- int dcd_sum0, dcd_sum1, dcd_sum2;
- int dcd_time;
- unsigned int pll_time;
- unsigned int txshreg;
- } ser12;
- } modem;
-
-#ifdef BAYCOM_DEBUG
- struct debug_vals {
- unsigned long last_jiffies;
- unsigned cur_intcnt;
- unsigned last_intcnt;
- int cur_pllcorr;
- int last_pllcorr;
- } debug_vals;
-#endif /* BAYCOM_DEBUG */
-};
-
-/* --------------------------------------------------------------------- */
-
-static inline void baycom_int_freq(struct baycom_state *bc)
-{
-#ifdef BAYCOM_DEBUG
- unsigned long cur_jiffies = jiffies;
- /*
- * measure the interrupt frequency
- */
- bc->debug_vals.cur_intcnt++;
- if (time_after_eq(cur_jiffies, bc->debug_vals.last_jiffies + HZ)) {
- bc->debug_vals.last_jiffies = cur_jiffies;
- bc->debug_vals.last_intcnt = bc->debug_vals.cur_intcnt;
- bc->debug_vals.cur_intcnt = 0;
- bc->debug_vals.last_pllcorr = bc->debug_vals.cur_pllcorr;
- bc->debug_vals.cur_pllcorr = 0;
- }
-#endif /* BAYCOM_DEBUG */
-}
-
-/* --------------------------------------------------------------------- */
-/*
- * ===================== SER12 specific routines =========================
- */
-
-/* --------------------------------------------------------------------- */
-
-static inline void ser12_set_divisor(struct net_device *dev,
- unsigned int divisor)
-{
- outb(0x81, LCR(dev->base_addr)); /* DLAB = 1 */
- outb(divisor, DLL(dev->base_addr));
- outb(divisor >> 8, DLM(dev->base_addr));
- outb(0x01, LCR(dev->base_addr)); /* word length = 6 */
- /*
- * make sure the next interrupt is generated;
- * 0 must be used to power the modem; the modem draws its
- * power from the TxD line
- */
- outb(0x00, THR(dev->base_addr));
- /*
- * it is important not to set the divider while transmitting;
- * this reportedly makes some UARTs generating interrupts
- * in the hundredthousands per second region
- * Reported by: Ignacio.Arenaza@studi.epfl.ch (Ignacio Arenaza Nuno)
- */
-}
-
-static __inline__ void ser12_rx(struct net_device *dev, struct baycom_state *bc, struct timespec64 *ts, unsigned char curs)
-{
- int timediff;
- int bdus8 = bc->baud_us >> 3;
- int bdus4 = bc->baud_us >> 2;
- int bdus2 = bc->baud_us >> 1;
-
- timediff = 1000000 + ts->tv_nsec / NSEC_PER_USEC -
- bc->modem.ser12.pll_time;
- while (timediff >= 500000)
- timediff -= 1000000;
- while (timediff >= bdus2) {
- timediff -= bc->baud_us;
- bc->modem.ser12.pll_time += bc->baud_us;
- bc->modem.ser12.dcd_time--;
- /* first check if there is room to add a bit */
- if (bc->modem.shreg & 1) {
- hdlcdrv_putbits(&bc->hdrv, (bc->modem.shreg >> 1) ^ 0xffff);
- bc->modem.shreg = 0x10000;
- }
- /* add a one bit */
- bc->modem.shreg >>= 1;
- }
- if (bc->modem.ser12.dcd_time <= 0) {
- if (!bc->opt_dcd)
- hdlcdrv_setdcd(&bc->hdrv, (bc->modem.ser12.dcd_sum0 +
- bc->modem.ser12.dcd_sum1 +
- bc->modem.ser12.dcd_sum2) < 0);
- bc->modem.ser12.dcd_sum2 = bc->modem.ser12.dcd_sum1;
- bc->modem.ser12.dcd_sum1 = bc->modem.ser12.dcd_sum0;
- bc->modem.ser12.dcd_sum0 = 2; /* slight bias */
- bc->modem.ser12.dcd_time += 120;
- }
- if (bc->modem.ser12.last_rxbit != curs) {
- bc->modem.ser12.last_rxbit = curs;
- bc->modem.shreg |= 0x10000;
- /* adjust the PLL */
- if (timediff > 0)
- bc->modem.ser12.pll_time += bdus8;
- else
- bc->modem.ser12.pll_time += 1000000 - bdus8;
- /* update DCD */
- if (abs(timediff) > bdus4)
- bc->modem.ser12.dcd_sum0 += 4;
- else
- bc->modem.ser12.dcd_sum0--;
-#ifdef BAYCOM_DEBUG
- bc->debug_vals.cur_pllcorr = timediff;
-#endif /* BAYCOM_DEBUG */
- }
- while (bc->modem.ser12.pll_time >= 1000000)
- bc->modem.ser12.pll_time -= 1000000;
-}
-
-/* --------------------------------------------------------------------- */
-
-static irqreturn_t ser12_interrupt(int irq, void *dev_id)
-{
- struct net_device *dev = (struct net_device *)dev_id;
- struct baycom_state *bc = netdev_priv(dev);
- struct timespec64 ts;
- unsigned char iir, msr;
- unsigned int txcount = 0;
-
- if (!bc || bc->hdrv.magic != HDLCDRV_MAGIC)
- return IRQ_NONE;
- /* fast way out for shared irq */
- if ((iir = inb(IIR(dev->base_addr))) & 1)
- return IRQ_NONE;
- /* get current time */
- ktime_get_ts64(&ts);
- msr = inb(MSR(dev->base_addr));
- /* delta DCD */
- if ((msr & 8) && bc->opt_dcd)
- hdlcdrv_setdcd(&bc->hdrv, !((msr ^ bc->opt_dcd) & 0x80));
- do {
- switch (iir & 6) {
- case 6:
- inb(LSR(dev->base_addr));
- break;
-
- case 4:
- inb(RBR(dev->base_addr));
- break;
-
- case 2:
- /*
- * make sure the next interrupt is generated;
- * 0 must be used to power the modem; the modem draws its
- * power from the TxD line
- */
- outb(0x00, THR(dev->base_addr));
- baycom_int_freq(bc);
- txcount++;
- /*
- * first output the last bit (!) then call HDLC transmitter,
- * since this may take quite long
- */
- if (bc->modem.ptt)
- outb(0x0e | (!!bc->modem.ser12.tx_bit), MCR(dev->base_addr));
- else
- outb(0x0d, MCR(dev->base_addr)); /* transmitter off */
- break;
-
- default:
- msr = inb(MSR(dev->base_addr));
- /* delta DCD */
- if ((msr & 8) && bc->opt_dcd)
- hdlcdrv_setdcd(&bc->hdrv, !((msr ^ bc->opt_dcd) & 0x80));
- break;
- }
- iir = inb(IIR(dev->base_addr));
- } while (!(iir & 1));
- ser12_rx(dev, bc, &ts, msr & 0x10); /* CTS */
- if (bc->modem.ptt && txcount) {
- if (bc->modem.ser12.txshreg <= 1) {
- bc->modem.ser12.txshreg = 0x10000 | hdlcdrv_getbits(&bc->hdrv);
- if (!hdlcdrv_ptt(&bc->hdrv)) {
- ser12_set_divisor(dev, 115200/100/8);
- bc->modem.ptt = 0;
- goto end_transmit;
- }
- }
- bc->modem.ser12.tx_bit = !(bc->modem.ser12.tx_bit ^ (bc->modem.ser12.txshreg & 1));
- bc->modem.ser12.txshreg >>= 1;
- }
- end_transmit:
- local_irq_enable();
- if (!bc->modem.ptt && txcount) {
- hdlcdrv_arbitrate(dev, &bc->hdrv);
- if (hdlcdrv_ptt(&bc->hdrv)) {
- ser12_set_divisor(dev, bc->baud_uartdiv);
- bc->modem.ser12.txshreg = 1;
- bc->modem.ptt = 1;
- }
- }
- hdlcdrv_transmitter(dev, &bc->hdrv);
- hdlcdrv_receiver(dev, &bc->hdrv);
- local_irq_disable();
- return IRQ_HANDLED;
-}
-
-/* --------------------------------------------------------------------- */
-
-enum uart { c_uart_unknown, c_uart_8250,
- c_uart_16450, c_uart_16550, c_uart_16550A};
-static const char *uart_str[] = {
- "unknown", "8250", "16450", "16550", "16550A"
-};
-
-static enum uart ser12_check_uart(unsigned int iobase)
-{
- unsigned char b1,b2,b3;
- enum uart u;
- enum uart uart_tab[] =
- { c_uart_16450, c_uart_unknown, c_uart_16550, c_uart_16550A };
-
- b1 = inb(MCR(iobase));
- outb(b1 | 0x10, MCR(iobase)); /* loopback mode */
- b2 = inb(MSR(iobase));
- outb(0x1a, MCR(iobase));
- b3 = inb(MSR(iobase)) & 0xf0;
- outb(b1, MCR(iobase)); /* restore old values */
- outb(b2, MSR(iobase));
- if (b3 != 0x90)
- return c_uart_unknown;
- inb(RBR(iobase));
- inb(RBR(iobase));
- outb(0x01, FCR(iobase)); /* enable FIFOs */
- u = uart_tab[(inb(IIR(iobase)) >> 6) & 3];
- if (u == c_uart_16450) {
- outb(0x5a, SCR(iobase));
- b1 = inb(SCR(iobase));
- outb(0xa5, SCR(iobase));
- b2 = inb(SCR(iobase));
- if ((b1 != 0x5a) || (b2 != 0xa5))
- u = c_uart_8250;
- }
- return u;
-}
-
-/* --------------------------------------------------------------------- */
-
-static int ser12_open(struct net_device *dev)
-{
- const unsigned int nr_irqs = irq_get_nr_irqs();
- struct baycom_state *bc = netdev_priv(dev);
- enum uart u;
-
- if (!dev || !bc)
- return -ENXIO;
- if (!dev->base_addr || dev->base_addr > 0xffff-SER12_EXTENT ||
- dev->irq < 2 || dev->irq > nr_irqs) {
- printk(KERN_INFO "baycom_ser_fdx: invalid portnumber (max %u) "
- "or irq (2 <= irq <= %d)\n",
- 0xffff-SER12_EXTENT, nr_irqs);
- return -ENXIO;
- }
- if (bc->baud < 300 || bc->baud > 4800) {
- printk(KERN_INFO "baycom_ser_fdx: invalid baudrate "
- "(300...4800)\n");
- return -EINVAL;
- }
- if (!request_region(dev->base_addr, SER12_EXTENT, "baycom_ser_fdx")) {
- printk(KERN_WARNING "BAYCOM_SER_FSX: I/O port 0x%04lx busy\n",
- dev->base_addr);
- return -EACCES;
- }
- memset(&bc->modem, 0, sizeof(bc->modem));
- bc->hdrv.par.bitrate = bc->baud;
- bc->baud_us = 1000000/bc->baud;
- bc->baud_uartdiv = (115200/8)/bc->baud;
- if ((u = ser12_check_uart(dev->base_addr)) == c_uart_unknown){
- release_region(dev->base_addr, SER12_EXTENT);
- return -EIO;
- }
- outb(0, FCR(dev->base_addr)); /* disable FIFOs */
- outb(0x0d, MCR(dev->base_addr));
- outb(0, IER(dev->base_addr));
- if (request_irq(dev->irq, ser12_interrupt, IRQF_SHARED,
- "baycom_ser_fdx", dev)) {
- release_region(dev->base_addr, SER12_EXTENT);
- return -EBUSY;
- }
- /*
- * set the SIO to 6 Bits/character; during receive,
- * the baud rate is set to produce 100 ints/sec
- * to feed the channel arbitration process,
- * during transmit to baud ints/sec to run
- * the transmitter
- */
- ser12_set_divisor(dev, 115200/100/8);
- /*
- * enable transmitter empty interrupt and modem status interrupt
- */
- outb(0x0a, IER(dev->base_addr));
- /*
- * make sure the next interrupt is generated;
- * 0 must be used to power the modem; the modem draws its
- * power from the TxD line
- */
- outb(0x00, THR(dev->base_addr));
- hdlcdrv_setdcd(&bc->hdrv, 0);
- printk(KERN_INFO "%s: ser_fdx at iobase 0x%lx irq %u baud %u uart %s\n",
- bc_drvname, dev->base_addr, dev->irq, bc->baud, uart_str[u]);
- return 0;
-}
-
-/* --------------------------------------------------------------------- */
-
-static int ser12_close(struct net_device *dev)
-{
- struct baycom_state *bc = netdev_priv(dev);
-
- if (!dev || !bc)
- return -EINVAL;
- /*
- * disable interrupts
- */
- outb(0, IER(dev->base_addr));
- outb(1, MCR(dev->base_addr));
- free_irq(dev->irq, dev);
- release_region(dev->base_addr, SER12_EXTENT);
- printk(KERN_INFO "%s: close ser_fdx at iobase 0x%lx irq %u\n",
- bc_drvname, dev->base_addr, dev->irq);
- return 0;
-}
-
-/* --------------------------------------------------------------------- */
-/*
- * ===================== hdlcdrv driver interface =========================
- */
-
-/* --------------------------------------------------------------------- */
-
-static int baycom_ioctl(struct net_device *dev, void __user *data,
- struct hdlcdrv_ioctl *hi, int cmd);
-
-/* --------------------------------------------------------------------- */
-
-static const struct hdlcdrv_ops ser12_ops = {
- .drvname = bc_drvname,
- .drvinfo = bc_drvinfo,
- .open = ser12_open,
- .close = ser12_close,
- .ioctl = baycom_ioctl,
-};
-
-/* --------------------------------------------------------------------- */
-
-static int baycom_setmode(struct baycom_state *bc, const char *modestr)
-{
- unsigned int baud;
-
- if (!strncmp(modestr, "ser", 3)) {
- baud = simple_strtoul(modestr+3, NULL, 10);
- if (baud >= 3 && baud <= 48)
- bc->baud = baud*100;
- }
- if (strchr(modestr, '*'))
- bc->opt_dcd = 0;
- else if (strchr(modestr, '+'))
- bc->opt_dcd = -1;
- else
- bc->opt_dcd = 1;
- return 0;
-}
-
-/* --------------------------------------------------------------------- */
-
-static int baycom_ioctl(struct net_device *dev, void __user *data,
- struct hdlcdrv_ioctl *hi, int cmd)
-{
- struct baycom_state *bc;
- struct baycom_ioctl bi;
-
- if (!dev)
- return -EINVAL;
-
- bc = netdev_priv(dev);
- BUG_ON(bc->hdrv.magic != HDLCDRV_MAGIC);
-
- if (cmd != SIOCDEVPRIVATE)
- return -ENOIOCTLCMD;
- switch (hi->cmd) {
- default:
- break;
-
- case HDLCDRVCTL_GETMODE:
- sprintf(hi->data.modename, "ser%u", bc->baud / 100);
- if (bc->opt_dcd <= 0)
- strcat(hi->data.modename, (!bc->opt_dcd) ? "*" : "+");
- if (copy_to_user(data, hi, sizeof(struct hdlcdrv_ioctl)))
- return -EFAULT;
- return 0;
-
- case HDLCDRVCTL_SETMODE:
- if (netif_running(dev) || !capable(CAP_NET_ADMIN))
- return -EACCES;
- hi->data.modename[sizeof(hi->data.modename)-1] = '\0';
- return baycom_setmode(bc, hi->data.modename);
-
- case HDLCDRVCTL_MODELIST:
- strscpy(hi->data.modename, "ser12,ser3,ser24");
- if (copy_to_user(data, hi, sizeof(struct hdlcdrv_ioctl)))
- return -EFAULT;
- return 0;
-
- case HDLCDRVCTL_MODEMPARMASK:
- return HDLCDRV_PARMASK_IOBASE | HDLCDRV_PARMASK_IRQ;
-
- }
-
- if (copy_from_user(&bi, data, sizeof(bi)))
- return -EFAULT;
- switch (bi.cmd) {
- default:
- return -ENOIOCTLCMD;
-
-#ifdef BAYCOM_DEBUG
- case BAYCOMCTL_GETDEBUG:
- bi.data.dbg.debug1 = bc->hdrv.ptt_keyed;
- bi.data.dbg.debug2 = bc->debug_vals.last_intcnt;
- bi.data.dbg.debug3 = bc->debug_vals.last_pllcorr;
- break;
-#endif /* BAYCOM_DEBUG */
-
- }
- if (copy_to_user(data, &bi, sizeof(bi)))
- return -EFAULT;
- return 0;
-
-}
-
-/* --------------------------------------------------------------------- */
-
-/*
- * command line settable parameters
- */
-static char *mode[NR_PORTS] = { "ser12*", };
-static int iobase[NR_PORTS] = { 0x3f8, };
-static int irq[NR_PORTS] = { 4, };
-static int baud[NR_PORTS] = { [0 ... NR_PORTS-1] = 1200 };
-
-module_param_array(mode, charp, NULL, 0);
-MODULE_PARM_DESC(mode, "baycom operating mode; * for software DCD");
-module_param_hw_array(iobase, int, ioport, NULL, 0);
-MODULE_PARM_DESC(iobase, "baycom io base address");
-module_param_hw_array(irq, int, irq, NULL, 0);
-MODULE_PARM_DESC(irq, "baycom irq number");
-module_param_array(baud, int, NULL, 0);
-MODULE_PARM_DESC(baud, "baycom baud rate (300 to 4800)");
-
-MODULE_AUTHOR("Thomas M. Sailer, sailer@ife.ee.ethz.ch, hb9jnx@hb9w.che.eu");
-MODULE_DESCRIPTION("Baycom ser12 full duplex amateur radio modem driver");
-MODULE_LICENSE("GPL");
-
-/* --------------------------------------------------------------------- */
-
-static int __init init_baycomserfdx(void)
-{
- int i, found = 0;
- char set_hw = 1;
-
- printk(bc_drvinfo);
- /*
- * register net devices
- */
- for (i = 0; i < NR_PORTS; i++) {
- struct net_device *dev;
- struct baycom_state *bc;
- char ifname[IFNAMSIZ];
-
- sprintf(ifname, "bcsf%d", i);
-
- if (!mode[i])
- set_hw = 0;
- if (!set_hw)
- iobase[i] = irq[i] = 0;
-
- dev = hdlcdrv_register(&ser12_ops,
- sizeof(struct baycom_state),
- ifname, iobase[i], irq[i], 0);
- if (IS_ERR(dev))
- break;
-
- bc = netdev_priv(dev);
- if (set_hw && baycom_setmode(bc, mode[i]))
- set_hw = 0;
- bc->baud = baud[i];
- found++;
- baycom_device[i] = dev;
- }
-
- if (!found)
- return -ENXIO;
- return 0;
-}
-
-static void __exit cleanup_baycomserfdx(void)
-{
- int i;
-
- for(i = 0; i < NR_PORTS; i++) {
- struct net_device *dev = baycom_device[i];
- if (dev)
- hdlcdrv_unregister(dev);
- }
-}
-
-module_init(init_baycomserfdx);
-module_exit(cleanup_baycomserfdx);
-
-/* --------------------------------------------------------------------- */
-
-#ifndef MODULE
-
-/*
- * format: baycom_ser_fdx=io,irq,mode
- * mode: ser# hardware DCD
- * ser#* software DCD
- * ser#+ hardware DCD, inverted signal at DCD pin
- * '#' denotes the baud rate / 100, eg. ser12* is '1200 baud, soft DCD'
- */
-
-static int __init baycom_ser_fdx_setup(char *str)
-{
- static unsigned nr_dev;
- int ints[4];
-
- if (nr_dev >= NR_PORTS)
- return 0;
- str = get_options(str, 4, ints);
- if (ints[0] < 2)
- return 0;
- mode[nr_dev] = str;
- iobase[nr_dev] = ints[1];
- irq[nr_dev] = ints[2];
- if (ints[0] >= 3)
- baud[nr_dev] = ints[3];
- nr_dev++;
- return 1;
-}
-
-__setup("baycom_ser_fdx=", baycom_ser_fdx_setup);
-
-#endif /* MODULE */
-/* --------------------------------------------------------------------- */
+++ /dev/null
-// SPDX-License-Identifier: GPL-2.0-or-later
-/*****************************************************************************/
-
-/*
- * baycom_ser_hdx.c -- baycom ser12 halfduplex radio modem driver.
- *
- * Copyright (C) 1996-2000 Thomas Sailer (sailer@ife.ee.ethz.ch)
- *
- * Please note that the GPL allows you to use the driver, NOT the radio.
- * In order to use the radio, you need a license from the communications
- * authority of your country.
- *
- * Supported modems
- *
- * ser12: This is a very simple 1200 baud AFSK modem. The modem consists only
- * of a modulator/demodulator chip, usually a TI TCM3105. The computer
- * is responsible for regenerating the receiver bit clock, as well as
- * for handling the HDLC protocol. The modem connects to a serial port,
- * hence the name. Since the serial port is not used as an async serial
- * port, the kernel driver for serial ports cannot be used, and this
- * driver only supports standard serial hardware (8250, 16450, 16550A)
- *
- * Command line options (insmod command line)
- *
- * mode ser12 hardware DCD
- * ser12* software DCD
- * ser12@ hardware/software DCD, i.e. no explicit DCD signal but hardware
- * mutes audio input to the modem
- * ser12+ hardware DCD, inverted signal at DCD pin
- * iobase base address of the port; common values are 0x3f8, 0x2f8, 0x3e8, 0x2e8
- * irq interrupt line of the port; common values are 4,3
- *
- * History:
- * 0.1 26.06.1996 Adapted from baycom.c and made network driver interface
- * 18.10.1996 Changed to new user space access routines (copy_{to,from}_user)
- * 0.3 26.04.1997 init code/data tagged
- * 0.4 08.07.1997 alternative ser12 decoding algorithm (uses delta CTS ints)
- * 0.5 11.11.1997 ser12/par96 split into separate files
- * 0.6 14.04.1998 cleanups
- * 0.7 03.08.1999 adapt to Linus' new __setup/__initcall
- * 0.8 10.08.1999 use module_init/module_exit
- * 0.9 12.02.2000 adapted to softnet driver interface
- * 0.10 03.07.2000 fix interface name handling
- */
-
-/*****************************************************************************/
-
-#include <linux/capability.h>
-#include <linux/module.h>
-#include <linux/ioport.h>
-#include <linux/string.h>
-#include <linux/init.h>
-#include <linux/interrupt.h>
-#include <linux/uaccess.h>
-#include <asm/io.h>
-#include <linux/hdlcdrv.h>
-#include <linux/baycom.h>
-#include <linux/jiffies.h>
-
-/* --------------------------------------------------------------------- */
-
-#define BAYCOM_DEBUG
-
-/* --------------------------------------------------------------------- */
-
-static const char bc_drvname[] = "baycom_ser_hdx";
-static const char bc_drvinfo[] = KERN_INFO "baycom_ser_hdx: (C) 1996-2000 Thomas Sailer, HB9JNX/AE4WA\n"
-"baycom_ser_hdx: version 0.10\n";
-
-/* --------------------------------------------------------------------- */
-
-#define NR_PORTS 4
-
-static struct net_device *baycom_device[NR_PORTS];
-
-/* --------------------------------------------------------------------- */
-
-#define RBR(iobase) (iobase+0)
-#define THR(iobase) (iobase+0)
-#define IER(iobase) (iobase+1)
-#define IIR(iobase) (iobase+2)
-#define FCR(iobase) (iobase+2)
-#define LCR(iobase) (iobase+3)
-#define MCR(iobase) (iobase+4)
-#define LSR(iobase) (iobase+5)
-#define MSR(iobase) (iobase+6)
-#define SCR(iobase) (iobase+7)
-#define DLL(iobase) (iobase+0)
-#define DLM(iobase) (iobase+1)
-
-#define SER12_EXTENT 8
-
-/* ---------------------------------------------------------------------- */
-/*
- * Information that need to be kept for each board.
- */
-
-struct baycom_state {
- struct hdlcdrv_state hdrv;
-
- int opt_dcd;
-
- struct modem_state {
- short arb_divider;
- unsigned char flags;
- unsigned int shreg;
- struct modem_state_ser12 {
- unsigned char tx_bit;
- int dcd_sum0, dcd_sum1, dcd_sum2;
- unsigned char last_sample;
- unsigned char last_rxbit;
- unsigned int dcd_shreg;
- unsigned int dcd_time;
- unsigned int bit_pll;
- unsigned char interm_sample;
- } ser12;
- } modem;
-
-#ifdef BAYCOM_DEBUG
- struct debug_vals {
- unsigned long last_jiffies;
- unsigned cur_intcnt;
- unsigned last_intcnt;
- int cur_pllcorr;
- int last_pllcorr;
- } debug_vals;
-#endif /* BAYCOM_DEBUG */
-};
-
-/* --------------------------------------------------------------------- */
-
-static inline void baycom_int_freq(struct baycom_state *bc)
-{
-#ifdef BAYCOM_DEBUG
- unsigned long cur_jiffies = jiffies;
- /*
- * measure the interrupt frequency
- */
- bc->debug_vals.cur_intcnt++;
- if (time_after_eq(cur_jiffies, bc->debug_vals.last_jiffies + HZ)) {
- bc->debug_vals.last_jiffies = cur_jiffies;
- bc->debug_vals.last_intcnt = bc->debug_vals.cur_intcnt;
- bc->debug_vals.cur_intcnt = 0;
- bc->debug_vals.last_pllcorr = bc->debug_vals.cur_pllcorr;
- bc->debug_vals.cur_pllcorr = 0;
- }
-#endif /* BAYCOM_DEBUG */
-}
-
-/* --------------------------------------------------------------------- */
-/*
- * ===================== SER12 specific routines =========================
- */
-
-static inline void ser12_set_divisor(struct net_device *dev,
- unsigned char divisor)
-{
- outb(0x81, LCR(dev->base_addr)); /* DLAB = 1 */
- outb(divisor, DLL(dev->base_addr));
- outb(0, DLM(dev->base_addr));
- outb(0x01, LCR(dev->base_addr)); /* word length = 6 */
- /*
- * make sure the next interrupt is generated;
- * 0 must be used to power the modem; the modem draws its
- * power from the TxD line
- */
- outb(0x00, THR(dev->base_addr));
- /*
- * it is important not to set the divider while transmitting;
- * this reportedly makes some UARTs generating interrupts
- * in the hundredthousands per second region
- * Reported by: Ignacio.Arenaza@studi.epfl.ch (Ignacio Arenaza Nuno)
- */
-}
-
-/* --------------------------------------------------------------------- */
-
-/*
- * must call the TX arbitrator every 10ms
- */
-#define SER12_ARB_DIVIDER(bc) (bc->opt_dcd ? 24 : 36)
-
-#define SER12_DCD_INTERVAL(bc) (bc->opt_dcd ? 12 : 240)
-
-static inline void ser12_tx(struct net_device *dev, struct baycom_state *bc)
-{
- /* one interrupt per channel bit */
- ser12_set_divisor(dev, 12);
- /*
- * first output the last bit (!) then call HDLC transmitter,
- * since this may take quite long
- */
- outb(0x0e | (!!bc->modem.ser12.tx_bit), MCR(dev->base_addr));
- if (bc->modem.shreg <= 1)
- bc->modem.shreg = 0x10000 | hdlcdrv_getbits(&bc->hdrv);
- bc->modem.ser12.tx_bit = !(bc->modem.ser12.tx_bit ^
- (bc->modem.shreg & 1));
- bc->modem.shreg >>= 1;
-}
-
-/* --------------------------------------------------------------------- */
-
-static inline void ser12_rx(struct net_device *dev, struct baycom_state *bc)
-{
- unsigned char cur_s;
- /*
- * do demodulator
- */
- cur_s = inb(MSR(dev->base_addr)) & 0x10; /* the CTS line */
- hdlcdrv_channelbit(&bc->hdrv, cur_s);
- bc->modem.ser12.dcd_shreg = (bc->modem.ser12.dcd_shreg << 1) |
- (cur_s != bc->modem.ser12.last_sample);
- bc->modem.ser12.last_sample = cur_s;
- if(bc->modem.ser12.dcd_shreg & 1) {
- if (!bc->opt_dcd) {
- unsigned int dcdspos, dcdsneg;
-
- dcdspos = dcdsneg = 0;
- dcdspos += ((bc->modem.ser12.dcd_shreg >> 1) & 1);
- if (!(bc->modem.ser12.dcd_shreg & 0x7ffffffe))
- dcdspos += 2;
- dcdsneg += ((bc->modem.ser12.dcd_shreg >> 2) & 1);
- dcdsneg += ((bc->modem.ser12.dcd_shreg >> 3) & 1);
- dcdsneg += ((bc->modem.ser12.dcd_shreg >> 4) & 1);
-
- bc->modem.ser12.dcd_sum0 += 16*dcdspos - dcdsneg;
- } else
- bc->modem.ser12.dcd_sum0--;
- }
- if(!bc->modem.ser12.dcd_time) {
- hdlcdrv_setdcd(&bc->hdrv, (bc->modem.ser12.dcd_sum0 +
- bc->modem.ser12.dcd_sum1 +
- bc->modem.ser12.dcd_sum2) < 0);
- bc->modem.ser12.dcd_sum2 = bc->modem.ser12.dcd_sum1;
- bc->modem.ser12.dcd_sum1 = bc->modem.ser12.dcd_sum0;
- /* offset to ensure DCD off on silent input */
- bc->modem.ser12.dcd_sum0 = 2;
- bc->modem.ser12.dcd_time = SER12_DCD_INTERVAL(bc);
- }
- bc->modem.ser12.dcd_time--;
- if (!bc->opt_dcd) {
- /*
- * PLL code for the improved software DCD algorithm
- */
- if (bc->modem.ser12.interm_sample) {
- /*
- * intermediate sample; set timing correction to normal
- */
- ser12_set_divisor(dev, 4);
- } else {
- /*
- * do PLL correction and call HDLC receiver
- */
- switch (bc->modem.ser12.dcd_shreg & 7) {
- case 1: /* transition too late */
- ser12_set_divisor(dev, 5);
-#ifdef BAYCOM_DEBUG
- bc->debug_vals.cur_pllcorr++;
-#endif /* BAYCOM_DEBUG */
- break;
- case 4: /* transition too early */
- ser12_set_divisor(dev, 3);
-#ifdef BAYCOM_DEBUG
- bc->debug_vals.cur_pllcorr--;
-#endif /* BAYCOM_DEBUG */
- break;
- default:
- ser12_set_divisor(dev, 4);
- break;
- }
- bc->modem.shreg >>= 1;
- if (bc->modem.ser12.last_sample ==
- bc->modem.ser12.last_rxbit)
- bc->modem.shreg |= 0x10000;
- bc->modem.ser12.last_rxbit =
- bc->modem.ser12.last_sample;
- }
- if (++bc->modem.ser12.interm_sample >= 3)
- bc->modem.ser12.interm_sample = 0;
- /*
- * DCD stuff
- */
- if (bc->modem.ser12.dcd_shreg & 1) {
- unsigned int dcdspos, dcdsneg;
-
- dcdspos = dcdsneg = 0;
- dcdspos += ((bc->modem.ser12.dcd_shreg >> 1) & 1);
- dcdspos += (!(bc->modem.ser12.dcd_shreg & 0x7ffffffe))
- << 1;
- dcdsneg += ((bc->modem.ser12.dcd_shreg >> 2) & 1);
- dcdsneg += ((bc->modem.ser12.dcd_shreg >> 3) & 1);
- dcdsneg += ((bc->modem.ser12.dcd_shreg >> 4) & 1);
-
- bc->modem.ser12.dcd_sum0 += 16*dcdspos - dcdsneg;
- }
- } else {
- /*
- * PLL algorithm for the hardware squelch DCD algorithm
- */
- if (bc->modem.ser12.interm_sample) {
- /*
- * intermediate sample; set timing correction to normal
- */
- ser12_set_divisor(dev, 6);
- } else {
- /*
- * do PLL correction and call HDLC receiver
- */
- switch (bc->modem.ser12.dcd_shreg & 3) {
- case 1: /* transition too late */
- ser12_set_divisor(dev, 7);
-#ifdef BAYCOM_DEBUG
- bc->debug_vals.cur_pllcorr++;
-#endif /* BAYCOM_DEBUG */
- break;
- case 2: /* transition too early */
- ser12_set_divisor(dev, 5);
-#ifdef BAYCOM_DEBUG
- bc->debug_vals.cur_pllcorr--;
-#endif /* BAYCOM_DEBUG */
- break;
- default:
- ser12_set_divisor(dev, 6);
- break;
- }
- bc->modem.shreg >>= 1;
- if (bc->modem.ser12.last_sample ==
- bc->modem.ser12.last_rxbit)
- bc->modem.shreg |= 0x10000;
- bc->modem.ser12.last_rxbit =
- bc->modem.ser12.last_sample;
- }
- bc->modem.ser12.interm_sample = !bc->modem.ser12.interm_sample;
- /*
- * DCD stuff
- */
- bc->modem.ser12.dcd_sum0 -= (bc->modem.ser12.dcd_shreg & 1);
- }
- outb(0x0d, MCR(dev->base_addr)); /* transmitter off */
- if (bc->modem.shreg & 1) {
- hdlcdrv_putbits(&bc->hdrv, bc->modem.shreg >> 1);
- bc->modem.shreg = 0x10000;
- }
- if(!bc->modem.ser12.dcd_time) {
- if (bc->opt_dcd & 1)
- hdlcdrv_setdcd(&bc->hdrv, !((inb(MSR(dev->base_addr)) ^ bc->opt_dcd) & 0x80));
- else
- hdlcdrv_setdcd(&bc->hdrv, (bc->modem.ser12.dcd_sum0 +
- bc->modem.ser12.dcd_sum1 +
- bc->modem.ser12.dcd_sum2) < 0);
- bc->modem.ser12.dcd_sum2 = bc->modem.ser12.dcd_sum1;
- bc->modem.ser12.dcd_sum1 = bc->modem.ser12.dcd_sum0;
- /* offset to ensure DCD off on silent input */
- bc->modem.ser12.dcd_sum0 = 2;
- bc->modem.ser12.dcd_time = SER12_DCD_INTERVAL(bc);
- }
- bc->modem.ser12.dcd_time--;
-}
-
-/* --------------------------------------------------------------------- */
-
-static irqreturn_t ser12_interrupt(int irq, void *dev_id)
-{
- struct net_device *dev = (struct net_device *)dev_id;
- struct baycom_state *bc = netdev_priv(dev);
- unsigned char iir;
-
- if (!dev || !bc || bc->hdrv.magic != HDLCDRV_MAGIC)
- return IRQ_NONE;
- /* fast way out */
- if ((iir = inb(IIR(dev->base_addr))) & 1)
- return IRQ_NONE;
- baycom_int_freq(bc);
- do {
- switch (iir & 6) {
- case 6:
- inb(LSR(dev->base_addr));
- break;
-
- case 4:
- inb(RBR(dev->base_addr));
- break;
-
- case 2:
- /*
- * check if transmitter active
- */
- if (hdlcdrv_ptt(&bc->hdrv))
- ser12_tx(dev, bc);
- else {
- ser12_rx(dev, bc);
- bc->modem.arb_divider--;
- }
- outb(0x00, THR(dev->base_addr));
- break;
-
- default:
- inb(MSR(dev->base_addr));
- break;
- }
- iir = inb(IIR(dev->base_addr));
- } while (!(iir & 1));
- if (bc->modem.arb_divider <= 0) {
- bc->modem.arb_divider = SER12_ARB_DIVIDER(bc);
- local_irq_enable();
- hdlcdrv_arbitrate(dev, &bc->hdrv);
- }
- local_irq_enable();
- hdlcdrv_transmitter(dev, &bc->hdrv);
- hdlcdrv_receiver(dev, &bc->hdrv);
- local_irq_disable();
- return IRQ_HANDLED;
-}
-
-/* --------------------------------------------------------------------- */
-
-enum uart { c_uart_unknown, c_uart_8250,
- c_uart_16450, c_uart_16550, c_uart_16550A};
-static const char *uart_str[] = {
- "unknown", "8250", "16450", "16550", "16550A"
-};
-
-static enum uart ser12_check_uart(unsigned int iobase)
-{
- unsigned char b1,b2,b3;
- enum uart u;
- enum uart uart_tab[] =
- { c_uart_16450, c_uart_unknown, c_uart_16550, c_uart_16550A };
-
- b1 = inb(MCR(iobase));
- outb(b1 | 0x10, MCR(iobase)); /* loopback mode */
- b2 = inb(MSR(iobase));
- outb(0x1a, MCR(iobase));
- b3 = inb(MSR(iobase)) & 0xf0;
- outb(b1, MCR(iobase)); /* restore old values */
- outb(b2, MSR(iobase));
- if (b3 != 0x90)
- return c_uart_unknown;
- inb(RBR(iobase));
- inb(RBR(iobase));
- outb(0x01, FCR(iobase)); /* enable FIFOs */
- u = uart_tab[(inb(IIR(iobase)) >> 6) & 3];
- if (u == c_uart_16450) {
- outb(0x5a, SCR(iobase));
- b1 = inb(SCR(iobase));
- outb(0xa5, SCR(iobase));
- b2 = inb(SCR(iobase));
- if ((b1 != 0x5a) || (b2 != 0xa5))
- u = c_uart_8250;
- }
- return u;
-}
-
-/* --------------------------------------------------------------------- */
-
-static int ser12_open(struct net_device *dev)
-{
- struct baycom_state *bc = netdev_priv(dev);
- enum uart u;
-
- if (!dev || !bc)
- return -ENXIO;
- if (!dev->base_addr || dev->base_addr > 0x1000-SER12_EXTENT ||
- dev->irq < 2 || dev->irq > 15)
- return -ENXIO;
- if (!request_region(dev->base_addr, SER12_EXTENT, "baycom_ser12"))
- return -EACCES;
- memset(&bc->modem, 0, sizeof(bc->modem));
- bc->hdrv.par.bitrate = 1200;
- if ((u = ser12_check_uart(dev->base_addr)) == c_uart_unknown) {
- release_region(dev->base_addr, SER12_EXTENT);
- return -EIO;
- }
- outb(0, FCR(dev->base_addr)); /* disable FIFOs */
- outb(0x0d, MCR(dev->base_addr));
- outb(0, IER(dev->base_addr));
- if (request_irq(dev->irq, ser12_interrupt, IRQF_SHARED,
- "baycom_ser12", dev)) {
- release_region(dev->base_addr, SER12_EXTENT);
- return -EBUSY;
- }
- /*
- * enable transmitter empty interrupt
- */
- outb(2, IER(dev->base_addr));
- /*
- * set the SIO to 6 Bits/character and 19200 or 28800 baud, so that
- * we get exactly (hopefully) 2 or 3 interrupts per radio symbol,
- * depending on the usage of the software DCD routine
- */
- ser12_set_divisor(dev, bc->opt_dcd ? 6 : 4);
- printk(KERN_INFO "%s: ser12 at iobase 0x%lx irq %u uart %s\n",
- bc_drvname, dev->base_addr, dev->irq, uart_str[u]);
- return 0;
-}
-
-/* --------------------------------------------------------------------- */
-
-static int ser12_close(struct net_device *dev)
-{
- struct baycom_state *bc = netdev_priv(dev);
-
- if (!dev || !bc)
- return -EINVAL;
- /*
- * disable interrupts
- */
- outb(0, IER(dev->base_addr));
- outb(1, MCR(dev->base_addr));
- free_irq(dev->irq, dev);
- release_region(dev->base_addr, SER12_EXTENT);
- printk(KERN_INFO "%s: close ser12 at iobase 0x%lx irq %u\n",
- bc_drvname, dev->base_addr, dev->irq);
- return 0;
-}
-
-/* --------------------------------------------------------------------- */
-/*
- * ===================== hdlcdrv driver interface =========================
- */
-
-/* --------------------------------------------------------------------- */
-
-static int baycom_ioctl(struct net_device *dev, void __user *data,
- struct hdlcdrv_ioctl *hi, int cmd);
-
-/* --------------------------------------------------------------------- */
-
-static const struct hdlcdrv_ops ser12_ops = {
- .drvname = bc_drvname,
- .drvinfo = bc_drvinfo,
- .open = ser12_open,
- .close = ser12_close,
- .ioctl = baycom_ioctl,
-};
-
-/* --------------------------------------------------------------------- */
-
-static int baycom_setmode(struct baycom_state *bc, const char *modestr)
-{
- if (strchr(modestr, '*'))
- bc->opt_dcd = 0;
- else if (strchr(modestr, '+'))
- bc->opt_dcd = -1;
- else if (strchr(modestr, '@'))
- bc->opt_dcd = -2;
- else
- bc->opt_dcd = 1;
- return 0;
-}
-
-/* --------------------------------------------------------------------- */
-
-static int baycom_ioctl(struct net_device *dev, void __user *data,
- struct hdlcdrv_ioctl *hi, int cmd)
-{
- struct baycom_state *bc;
- struct baycom_ioctl bi;
-
- if (!dev)
- return -EINVAL;
-
- bc = netdev_priv(dev);
- BUG_ON(bc->hdrv.magic != HDLCDRV_MAGIC);
-
- if (cmd != SIOCDEVPRIVATE)
- return -ENOIOCTLCMD;
- switch (hi->cmd) {
- default:
- break;
-
- case HDLCDRVCTL_GETMODE:
- strscpy(hi->data.modename, "ser12");
- if (bc->opt_dcd <= 0)
- strcat(hi->data.modename, (!bc->opt_dcd) ? "*" : (bc->opt_dcd == -2) ? "@" : "+");
- if (copy_to_user(data, hi, sizeof(struct hdlcdrv_ioctl)))
- return -EFAULT;
- return 0;
-
- case HDLCDRVCTL_SETMODE:
- if (netif_running(dev) || !capable(CAP_NET_ADMIN))
- return -EACCES;
- hi->data.modename[sizeof(hi->data.modename)-1] = '\0';
- return baycom_setmode(bc, hi->data.modename);
-
- case HDLCDRVCTL_MODELIST:
- strscpy(hi->data.modename, "ser12");
- if (copy_to_user(data, hi, sizeof(struct hdlcdrv_ioctl)))
- return -EFAULT;
- return 0;
-
- case HDLCDRVCTL_MODEMPARMASK:
- return HDLCDRV_PARMASK_IOBASE | HDLCDRV_PARMASK_IRQ;
-
- }
-
- if (copy_from_user(&bi, data, sizeof(bi)))
- return -EFAULT;
- switch (bi.cmd) {
- default:
- return -ENOIOCTLCMD;
-
-#ifdef BAYCOM_DEBUG
- case BAYCOMCTL_GETDEBUG:
- bi.data.dbg.debug1 = bc->hdrv.ptt_keyed;
- bi.data.dbg.debug2 = bc->debug_vals.last_intcnt;
- bi.data.dbg.debug3 = bc->debug_vals.last_pllcorr;
- break;
-#endif /* BAYCOM_DEBUG */
-
- }
- if (copy_to_user(data, &bi, sizeof(bi)))
- return -EFAULT;
- return 0;
-
-}
-
-/* --------------------------------------------------------------------- */
-
-/*
- * command line settable parameters
- */
-static char *mode[NR_PORTS] = { "ser12*", };
-static int iobase[NR_PORTS] = { 0x3f8, };
-static int irq[NR_PORTS] = { 4, };
-
-module_param_array(mode, charp, NULL, 0);
-MODULE_PARM_DESC(mode, "baycom operating mode; * for software DCD");
-module_param_hw_array(iobase, int, ioport, NULL, 0);
-MODULE_PARM_DESC(iobase, "baycom io base address");
-module_param_hw_array(irq, int, irq, NULL, 0);
-MODULE_PARM_DESC(irq, "baycom irq number");
-
-MODULE_AUTHOR("Thomas M. Sailer, sailer@ife.ee.ethz.ch, hb9jnx@hb9w.che.eu");
-MODULE_DESCRIPTION("Baycom ser12 half duplex amateur radio modem driver");
-MODULE_LICENSE("GPL");
-
-/* --------------------------------------------------------------------- */
-
-static int __init init_baycomserhdx(void)
-{
- int i, found = 0;
- char set_hw = 1;
-
- printk(bc_drvinfo);
- /*
- * register net devices
- */
- for (i = 0; i < NR_PORTS; i++) {
- struct net_device *dev;
- struct baycom_state *bc;
- char ifname[IFNAMSIZ];
-
- sprintf(ifname, "bcsh%d", i);
-
- if (!mode[i])
- set_hw = 0;
- if (!set_hw)
- iobase[i] = irq[i] = 0;
-
- dev = hdlcdrv_register(&ser12_ops,
- sizeof(struct baycom_state),
- ifname, iobase[i], irq[i], 0);
- if (IS_ERR(dev))
- break;
-
- bc = netdev_priv(dev);
- if (set_hw && baycom_setmode(bc, mode[i]))
- set_hw = 0;
- found++;
- baycom_device[i] = dev;
- }
-
- if (!found)
- return -ENXIO;
- return 0;
-}
-
-static void __exit cleanup_baycomserhdx(void)
-{
- int i;
-
- for(i = 0; i < NR_PORTS; i++) {
- struct net_device *dev = baycom_device[i];
-
- if (dev)
- hdlcdrv_unregister(dev);
- }
-}
-
-module_init(init_baycomserhdx);
-module_exit(cleanup_baycomserhdx);
-
-/* --------------------------------------------------------------------- */
-
-#ifndef MODULE
-
-/*
- * format: baycom_ser_hdx=io,irq,mode
- * mode: ser12 hardware DCD
- * ser12* software DCD
- * ser12@ hardware/software DCD, i.e. no explicit DCD signal but hardware
- * mutes audio input to the modem
- * ser12+ hardware DCD, inverted signal at DCD pin
- */
-
-static int __init baycom_ser_hdx_setup(char *str)
-{
- static unsigned nr_dev;
- int ints[3];
-
- if (nr_dev >= NR_PORTS)
- return 0;
- str = get_options(str, 3, ints);
- if (ints[0] < 2)
- return 0;
- mode[nr_dev] = str;
- iobase[nr_dev] = ints[1];
- irq[nr_dev] = ints[2];
- nr_dev++;
- return 1;
-}
-
-__setup("baycom_ser_hdx=", baycom_ser_hdx_setup);
-
-#endif /* MODULE */
-/* --------------------------------------------------------------------- */
+++ /dev/null
-// SPDX-License-Identifier: GPL-2.0-or-later
-/*
- * G8BPQ compatible "AX.25 via ethernet" driver release 004
- *
- * This code REQUIRES 2.0.0 or higher/ NET3.029
- *
- * This is a "pseudo" network driver to allow AX.25 over Ethernet
- * using G8BPQ encapsulation. It has been extracted from the protocol
- * implementation because
- *
- * - things got unreadable within the protocol stack
- * - to cure the protocol stack from "feature-ism"
- * - a protocol implementation shouldn't need to know on
- * which hardware it is running
- * - user-level programs like the AX.25 utilities shouldn't
- * need to know about the hardware.
- * - IP over ethernet encapsulated AX.25 was impossible
- * - rxecho.c did not work
- * - to have room for extensions
- * - it just deserves to "live" as an own driver
- *
- * This driver can use any ethernet destination address, and can be
- * limited to accept frames from one dedicated ethernet card only.
- *
- * Note that the driver sets up the BPQ devices automagically on
- * startup or (if started before the "insmod" of an ethernet device)
- * on "ifconfig up". It hopefully will remove the BPQ on "rmmod"ing
- * the ethernet device (in fact: as soon as another ethernet or bpq
- * device gets "ifconfig"ured).
- *
- * I have heard that several people are thinking of experiments
- * with highspeed packet radio using existing ethernet cards.
- * Well, this driver is prepared for this purpose, just add
- * your tx key control and a txdelay / tailtime algorithm,
- * probably some buffering, and /voila/...
- *
- * History
- * BPQ 001 Joerg(DL1BKE) Extracted BPQ code from AX.25
- * protocol stack and added my own
- * yet existing patches
- * BPQ 002 Joerg(DL1BKE) Scan network device list on
- * startup.
- * BPQ 003 Joerg(DL1BKE) Ethernet destination address
- * and accepted source address
- * can be configured by an ioctl()
- * call.
- * Fixed to match Linux networking
- * changes - 2.1.15.
- * BPQ 004 Joerg(DL1BKE) Fixed to not lock up on ifconfig.
- */
-
-#include <linux/errno.h>
-#include <linux/types.h>
-#include <linux/socket.h>
-#include <linux/in.h>
-#include <linux/kernel.h>
-#include <linux/string.h>
-#include <linux/net.h>
-#include <linux/slab.h>
-#include <net/ax25.h>
-#include <linux/inet.h>
-#include <linux/netdevice.h>
-#include <linux/etherdevice.h>
-#include <linux/if_arp.h>
-#include <linux/skbuff.h>
-#include <net/sock.h>
-#include <linux/uaccess.h>
-#include <linux/mm.h>
-#include <linux/interrupt.h>
-#include <linux/notifier.h>
-#include <linux/proc_fs.h>
-#include <linux/seq_file.h>
-#include <linux/stat.h>
-#include <linux/module.h>
-#include <linux/init.h>
-#include <linux/rtnetlink.h>
-
-#include <net/ip.h>
-#include <net/arp.h>
-#include <net/netdev_lock.h>
-#include <net/net_namespace.h>
-
-#include <linux/bpqether.h>
-
-static const char banner[] __initconst = KERN_INFO \
- "AX.25: bpqether driver version 004\n";
-
-static int bpq_rcv(struct sk_buff *, struct net_device *, struct packet_type *, struct net_device *);
-static int bpq_device_event(struct notifier_block *, unsigned long, void *);
-
-static struct packet_type bpq_packet_type __read_mostly = {
- .type = cpu_to_be16(ETH_P_BPQ),
- .func = bpq_rcv,
-};
-
-static struct notifier_block bpq_dev_notifier = {
- .notifier_call = bpq_device_event,
-};
-
-
-struct bpqdev {
- struct list_head bpq_list; /* list of bpq devices chain */
- struct net_device *ethdev; /* link to ethernet device */
- struct net_device *axdev; /* bpq device (bpq#) */
- char dest_addr[6]; /* ether destination address */
- char acpt_addr[6]; /* accept ether frames from this address only */
-};
-
-static LIST_HEAD(bpq_devices);
-
-/* ------------------------------------------------------------------------ */
-
-
-/*
- * Get the ethernet device for a BPQ device
- */
-static inline struct net_device *bpq_get_ether_dev(struct net_device *dev)
-{
- struct bpqdev *bpq = netdev_priv(dev);
-
- return bpq ? bpq->ethdev : NULL;
-}
-
-/*
- * Get the BPQ device for the ethernet device
- */
-static inline struct net_device *bpq_get_ax25_dev(struct net_device *dev)
-{
- struct bpqdev *bpq;
-
- list_for_each_entry_rcu(bpq, &bpq_devices, bpq_list,
- lockdep_rtnl_is_held()) {
- if (bpq->ethdev == dev)
- return bpq->axdev;
- }
- return NULL;
-}
-
-static inline int dev_is_ethdev(struct net_device *dev)
-{
- return dev->type == ARPHRD_ETHER && !netdev_need_ops_lock(dev);
-}
-
-/* ------------------------------------------------------------------------ */
-
-
-/*
- * Receive an AX.25 frame via an ethernet interface.
- */
-static int bpq_rcv(struct sk_buff *skb, struct net_device *dev, struct packet_type *ptype, struct net_device *orig_dev)
-{
- int len;
- char * ptr;
- struct ethhdr *eth;
- struct bpqdev *bpq;
-
- if (!net_eq(dev_net(dev), &init_net))
- goto drop;
-
- if ((skb = skb_share_check(skb, GFP_ATOMIC)) == NULL)
- return NET_RX_DROP;
-
- if (!pskb_may_pull(skb, sizeof(struct ethhdr)))
- goto drop;
-
- rcu_read_lock();
- dev = bpq_get_ax25_dev(dev);
-
- if (dev == NULL || !netif_running(dev))
- goto drop_unlock;
-
- /*
- * if we want to accept frames from just one ethernet device
- * we check the source address of the sender.
- */
-
- bpq = netdev_priv(dev);
-
- eth = eth_hdr(skb);
-
- if (!(bpq->acpt_addr[0] & 0x01) &&
- !ether_addr_equal(eth->h_source, bpq->acpt_addr))
- goto drop_unlock;
-
- if (skb_cow(skb, sizeof(struct ethhdr)))
- goto drop_unlock;
-
- len = skb->data[0] + skb->data[1] * 256 - 5;
-
- if (len < 0 || len > skb->len - 2)
- goto drop_unlock;
-
- skb_pull(skb, 2); /* Remove the length bytes */
- skb_trim(skb, len); /* Set the length of the data */
-
- dev->stats.rx_packets++;
- dev->stats.rx_bytes += len;
-
- ptr = skb_push(skb, 1);
- *ptr = 0;
-
- skb->protocol = ax25_type_trans(skb, dev);
- netif_rx(skb);
-unlock:
-
- rcu_read_unlock();
-
- return 0;
-drop_unlock:
- kfree_skb(skb);
- goto unlock;
-
-drop:
- kfree_skb(skb);
- return 0;
-}
-
-/*
- * Send an AX.25 frame via an ethernet interface
- */
-static netdev_tx_t bpq_xmit(struct sk_buff *skb, struct net_device *dev)
-{
- unsigned char *ptr;
- struct bpqdev *bpq;
- struct net_device *orig_dev;
- int size;
-
- if (skb->protocol == htons(ETH_P_IP))
- return ax25_ip_xmit(skb);
-
- /*
- * Just to be *really* sure not to send anything if the interface
- * is down, the ethernet device may have gone.
- */
- if (!netif_running(dev)) {
- kfree_skb(skb);
- return NETDEV_TX_OK;
- }
-
- skb_pull(skb, 1); /* Drop KISS byte */
- size = skb->len;
-
- /*
- * We're about to mess with the skb which may still shared with the
- * generic networking code so unshare and ensure it's got enough
- * space for the BPQ headers.
- */
- if (skb_cow(skb, AX25_BPQ_HEADER_LEN)) {
- if (net_ratelimit())
- pr_err("bpqether: out of memory\n");
- kfree_skb(skb);
-
- return NETDEV_TX_OK;
- }
-
- ptr = skb_push(skb, 2); /* Make space for length */
-
- *ptr++ = (size + 5) % 256;
- *ptr++ = (size + 5) / 256;
-
- bpq = netdev_priv(dev);
-
- orig_dev = dev;
- if ((dev = bpq_get_ether_dev(dev)) == NULL) {
- orig_dev->stats.tx_dropped++;
- kfree_skb(skb);
- return NETDEV_TX_OK;
- }
-
- skb->protocol = ax25_type_trans(skb, dev);
- skb_reset_network_header(skb);
- dev_hard_header(skb, dev, ETH_P_BPQ, bpq->dest_addr, NULL, 0);
- dev->stats.tx_packets++;
- dev->stats.tx_bytes+=skb->len;
-
- dev_queue_xmit(skb);
- netif_wake_queue(dev);
- return NETDEV_TX_OK;
-}
-
-/*
- * Set AX.25 callsign
- */
-static int bpq_set_mac_address(struct net_device *dev, void *addr)
-{
- struct sockaddr *sa = (struct sockaddr *)addr;
-
- dev_addr_set(dev, sa->sa_data);
-
- return 0;
-}
-
-/* Ioctl commands
- *
- * SIOCSBPQETHOPT reserved for enhancements
- * SIOCSBPQETHADDR set the destination and accepted
- * source ethernet address (broadcast
- * or multicast: accept all)
- */
-static int bpq_siocdevprivate(struct net_device *dev, struct ifreq *ifr,
- void __user *data, int cmd)
-{
- struct bpq_ethaddr __user *ethaddr = data;
- struct bpqdev *bpq = netdev_priv(dev);
- struct bpq_req req;
-
- if (!capable(CAP_NET_ADMIN))
- return -EPERM;
-
- switch (cmd) {
- case SIOCSBPQETHOPT:
- if (copy_from_user(&req, data, sizeof(struct bpq_req)))
- return -EFAULT;
- switch (req.cmd) {
- case SIOCGBPQETHPARAM:
- case SIOCSBPQETHPARAM:
- default:
- return -EINVAL;
- }
-
- break;
-
- case SIOCSBPQETHADDR:
- if (copy_from_user(bpq->dest_addr, ethaddr->destination, ETH_ALEN))
- return -EFAULT;
- if (copy_from_user(bpq->acpt_addr, ethaddr->accept, ETH_ALEN))
- return -EFAULT;
- break;
-
- default:
- return -EINVAL;
- }
-
- return 0;
-}
-
-/*
- * open/close a device
- */
-static int bpq_open(struct net_device *dev)
-{
- netif_start_queue(dev);
- return 0;
-}
-
-static int bpq_close(struct net_device *dev)
-{
- netif_stop_queue(dev);
- return 0;
-}
-
-
-/* ------------------------------------------------------------------------ */
-
-#ifdef CONFIG_PROC_FS
-/*
- * Proc filesystem
- */
-static void *bpq_seq_start(struct seq_file *seq, loff_t *pos)
- __acquires(RCU)
-{
- int i = 1;
- struct bpqdev *bpqdev;
-
- rcu_read_lock();
-
- if (*pos == 0)
- return SEQ_START_TOKEN;
-
- list_for_each_entry_rcu(bpqdev, &bpq_devices, bpq_list) {
- if (i == *pos)
- return bpqdev;
- }
- return NULL;
-}
-
-static void *bpq_seq_next(struct seq_file *seq, void *v, loff_t *pos)
-{
- struct list_head *p;
- struct bpqdev *bpqdev = v;
-
- ++*pos;
-
- if (v == SEQ_START_TOKEN)
- p = rcu_dereference(list_next_rcu(&bpq_devices));
- else
- p = rcu_dereference(list_next_rcu(&bpqdev->bpq_list));
-
- return (p == &bpq_devices) ? NULL
- : list_entry(p, struct bpqdev, bpq_list);
-}
-
-static void bpq_seq_stop(struct seq_file *seq, void *v)
- __releases(RCU)
-{
- rcu_read_unlock();
-}
-
-
-static int bpq_seq_show(struct seq_file *seq, void *v)
-{
- if (v == SEQ_START_TOKEN)
- seq_puts(seq,
- "dev ether destination accept from\n");
- else {
- const struct bpqdev *bpqdev = v;
-
- seq_printf(seq, "%-5s %-10s %pM ",
- bpqdev->axdev->name, bpqdev->ethdev->name,
- bpqdev->dest_addr);
-
- if (is_multicast_ether_addr(bpqdev->acpt_addr))
- seq_printf(seq, "*\n");
- else
- seq_printf(seq, "%pM\n", bpqdev->acpt_addr);
-
- }
- return 0;
-}
-
-static const struct seq_operations bpq_seqops = {
- .start = bpq_seq_start,
- .next = bpq_seq_next,
- .stop = bpq_seq_stop,
- .show = bpq_seq_show,
-};
-#endif
-/* ------------------------------------------------------------------------ */
-
-static const struct net_device_ops bpq_netdev_ops = {
- .ndo_open = bpq_open,
- .ndo_stop = bpq_close,
- .ndo_start_xmit = bpq_xmit,
- .ndo_set_mac_address = bpq_set_mac_address,
- .ndo_siocdevprivate = bpq_siocdevprivate,
-};
-
-static void bpq_setup(struct net_device *dev)
-{
- netdev_lockdep_set_classes(dev);
-
- dev->netdev_ops = &bpq_netdev_ops;
- dev->needs_free_netdev = true;
-
- dev->flags = 0;
- dev->lltx = true; /* Allow recursion */
-
-#if IS_ENABLED(CONFIG_AX25)
- dev->header_ops = &ax25_header_ops;
-#endif
-
- dev->type = ARPHRD_AX25;
- dev->hard_header_len = AX25_MAX_HEADER_LEN + AX25_BPQ_HEADER_LEN;
- dev->mtu = AX25_DEF_PACLEN;
- dev->addr_len = AX25_ADDR_LEN;
-
- memcpy(dev->broadcast, &ax25_bcast, AX25_ADDR_LEN);
- dev_addr_set(dev, (u8 *)&ax25_defaddr);
-}
-
-/*
- * Setup a new device.
- */
-static int bpq_new_device(struct net_device *edev)
-{
- int err;
- struct net_device *ndev;
- struct bpqdev *bpq;
-
- ndev = alloc_netdev(sizeof(struct bpqdev), "bpq%d", NET_NAME_UNKNOWN,
- bpq_setup);
- if (!ndev)
- return -ENOMEM;
-
-
- bpq = netdev_priv(ndev);
- dev_hold(edev);
- bpq->ethdev = edev;
- bpq->axdev = ndev;
-
- eth_broadcast_addr(bpq->dest_addr);
- eth_broadcast_addr(bpq->acpt_addr);
-
- err = register_netdevice(ndev);
- if (err)
- goto error;
-
- /* List protected by RTNL */
- list_add_rcu(&bpq->bpq_list, &bpq_devices);
- return 0;
-
- error:
- dev_put(edev);
- free_netdev(ndev);
- return err;
-
-}
-
-static void bpq_free_device(struct net_device *ndev)
-{
- struct bpqdev *bpq = netdev_priv(ndev);
-
- dev_put(bpq->ethdev);
- list_del_rcu(&bpq->bpq_list);
-
- unregister_netdevice(ndev);
-}
-
-/*
- * Handle device status changes.
- */
-static int bpq_device_event(struct notifier_block *this,
- unsigned long event, void *ptr)
-{
- struct net_device *dev = netdev_notifier_info_to_dev(ptr);
-
- if (!net_eq(dev_net(dev), &init_net))
- return NOTIFY_DONE;
-
- if (!dev_is_ethdev(dev) && !bpq_get_ax25_dev(dev))
- return NOTIFY_DONE;
-
- switch (event) {
- case NETDEV_UP: /* new ethernet device -> new BPQ interface */
- if (bpq_get_ax25_dev(dev) == NULL)
- bpq_new_device(dev);
- break;
-
- case NETDEV_DOWN: /* ethernet device closed -> close BPQ interface */
- if ((dev = bpq_get_ax25_dev(dev)) != NULL)
- dev_close(dev);
- break;
-
- case NETDEV_UNREGISTER: /* ethernet device removed -> free BPQ interface */
- if ((dev = bpq_get_ax25_dev(dev)) != NULL)
- bpq_free_device(dev);
- break;
- default:
- break;
- }
-
- return NOTIFY_DONE;
-}
-
-
-/* ------------------------------------------------------------------------ */
-
-/*
- * Initialize driver. To be called from af_ax25 if not compiled as a
- * module
- */
-static int __init bpq_init_driver(void)
-{
-#ifdef CONFIG_PROC_FS
- if (!proc_create_seq("bpqether", 0444, init_net.proc_net, &bpq_seqops)) {
- printk(KERN_ERR
- "bpq: cannot create /proc/net/bpqether entry.\n");
- return -ENOENT;
- }
-#endif /* CONFIG_PROC_FS */
-
- dev_add_pack(&bpq_packet_type);
-
- register_netdevice_notifier(&bpq_dev_notifier);
-
- printk(banner);
-
- return 0;
-}
-
-static void __exit bpq_cleanup_driver(void)
-{
- struct bpqdev *bpq;
-
- dev_remove_pack(&bpq_packet_type);
-
- unregister_netdevice_notifier(&bpq_dev_notifier);
-
- remove_proc_entry("bpqether", init_net.proc_net);
-
- rtnl_lock();
- while (!list_empty(&bpq_devices)) {
- bpq = list_entry(bpq_devices.next, struct bpqdev, bpq_list);
- bpq_free_device(bpq->axdev);
- }
- rtnl_unlock();
-}
-
-MODULE_AUTHOR("Joerg Reuter DL1BKE <jreuter@yaina.de>");
-MODULE_DESCRIPTION("Transmit and receive AX.25 packets over Ethernet");
-MODULE_LICENSE("GPL");
-module_init(bpq_init_driver);
-module_exit(bpq_cleanup_driver);
+++ /dev/null
-// SPDX-License-Identifier: GPL-2.0-or-later
-/*****************************************************************************/
-
-/*
- * hdlcdrv.c -- HDLC packet radio network driver.
- *
- * Copyright (C) 1996-2000 Thomas Sailer (sailer@ife.ee.ethz.ch)
- *
- * Please note that the GPL allows you to use the driver, NOT the radio.
- * In order to use the radio, you need a license from the communications
- * authority of your country.
- *
- * The driver was derived from Donald Beckers skeleton.c
- * Written 1993-94 by Donald Becker.
- *
- * History:
- * 0.1 21.09.1996 Started
- * 18.10.1996 Changed to new user space access routines
- * (copy_{to,from}_user)
- * 0.2 21.11.1996 various small changes
- * 0.3 03.03.1997 fixed (hopefully) IP not working with ax.25 as a module
- * 0.4 16.04.1997 init code/data tagged
- * 0.5 30.07.1997 made HDLC buffers bigger (solves a problem with the
- * soundmodem driver)
- * 0.6 05.04.1998 add spinlocks
- * 0.7 03.08.1999 removed some old compatibility cruft
- * 0.8 12.02.2000 adapted to softnet driver interface
- */
-
-/*****************************************************************************/
-
-#include <linux/capability.h>
-#include <linux/compat.h>
-#include <linux/module.h>
-#include <linux/types.h>
-#include <linux/net.h>
-#include <linux/in.h>
-#include <linux/if.h>
-#include <linux/errno.h>
-#include <linux/init.h>
-#include <linux/bitops.h>
-
-#include <linux/netdevice.h>
-#include <linux/if_arp.h>
-#include <linux/skbuff.h>
-#include <linux/hdlcdrv.h>
-#include <linux/random.h>
-#include <net/ax25.h>
-#include <linux/uaccess.h>
-
-#include <linux/crc-ccitt.h>
-
-/* --------------------------------------------------------------------- */
-
-#define KISS_VERBOSE
-
-/* --------------------------------------------------------------------- */
-
-#define PARAM_TXDELAY 1
-#define PARAM_PERSIST 2
-#define PARAM_SLOTTIME 3
-#define PARAM_TXTAIL 4
-#define PARAM_FULLDUP 5
-#define PARAM_HARDWARE 6
-#define PARAM_RETURN 255
-
-/* --------------------------------------------------------------------- */
-/*
- * the CRC routines are stolen from WAMPES
- * by Dieter Deyke
- */
-
-
-/*---------------------------------------------------------------------------*/
-
-static inline void append_crc_ccitt(unsigned char *buffer, int len)
-{
- unsigned int crc = crc_ccitt(0xffff, buffer, len) ^ 0xffff;
- buffer += len;
- *buffer++ = crc;
- *buffer++ = crc >> 8;
-}
-
-/*---------------------------------------------------------------------------*/
-
-static inline int check_crc_ccitt(const unsigned char *buf, int cnt)
-{
- return (crc_ccitt(0xffff, buf, cnt) & 0xffff) == 0xf0b8;
-}
-
-/*---------------------------------------------------------------------------*/
-
-#if 0
-static int calc_crc_ccitt(const unsigned char *buf, int cnt)
-{
- unsigned int crc = 0xffff;
-
- for (; cnt > 0; cnt--)
- crc = (crc >> 8) ^ crc_ccitt_table[(crc ^ *buf++) & 0xff];
- crc ^= 0xffff;
- return crc & 0xffff;
-}
-#endif
-
-/* ---------------------------------------------------------------------- */
-
-#define tenms_to_2flags(s,tenms) ((tenms * s->par.bitrate) / 100 / 16)
-
-/* ---------------------------------------------------------------------- */
-/*
- * The HDLC routines
- */
-
-static int hdlc_rx_add_bytes(struct hdlcdrv_state *s, unsigned int bits,
- int num)
-{
- int added = 0;
-
- while (s->hdlcrx.rx_state && num >= 8) {
- if (s->hdlcrx.len >= sizeof(s->hdlcrx.buffer)) {
- s->hdlcrx.rx_state = 0;
- return 0;
- }
- *s->hdlcrx.bp++ = bits >> (32-num);
- s->hdlcrx.len++;
- num -= 8;
- added += 8;
- }
- return added;
-}
-
-static void hdlc_rx_flag(struct net_device *dev, struct hdlcdrv_state *s)
-{
- struct sk_buff *skb;
- int pkt_len;
- unsigned char *cp;
-
- if (s->hdlcrx.len < 4)
- return;
- if (!check_crc_ccitt(s->hdlcrx.buffer, s->hdlcrx.len))
- return;
- pkt_len = s->hdlcrx.len - 2 + 1; /* KISS kludge */
- if (!(skb = dev_alloc_skb(pkt_len))) {
- printk("%s: memory squeeze, dropping packet\n", dev->name);
- dev->stats.rx_dropped++;
- return;
- }
- cp = skb_put(skb, pkt_len);
- *cp++ = 0; /* KISS kludge */
- memcpy(cp, s->hdlcrx.buffer, pkt_len - 1);
- skb->protocol = ax25_type_trans(skb, dev);
- netif_rx(skb);
- dev->stats.rx_packets++;
-}
-
-void hdlcdrv_receiver(struct net_device *dev, struct hdlcdrv_state *s)
-{
- int i;
- unsigned int mask1, mask2, mask3, mask4, mask5, mask6, word;
-
- if (!s || s->magic != HDLCDRV_MAGIC)
- return;
- if (test_and_set_bit(0, &s->hdlcrx.in_hdlc_rx))
- return;
-
- while (!hdlcdrv_hbuf_empty(&s->hdlcrx.hbuf)) {
- word = hdlcdrv_hbuf_get(&s->hdlcrx.hbuf);
-
-#ifdef HDLCDRV_DEBUG
- hdlcdrv_add_bitbuffer_word(&s->bitbuf_hdlc, word);
-#endif /* HDLCDRV_DEBUG */
- s->hdlcrx.bitstream >>= 16;
- s->hdlcrx.bitstream |= word << 16;
- s->hdlcrx.bitbuf >>= 16;
- s->hdlcrx.bitbuf |= word << 16;
- s->hdlcrx.numbits += 16;
- for(i = 15, mask1 = 0x1fc00, mask2 = 0x1fe00, mask3 = 0x0fc00,
- mask4 = 0x1f800, mask5 = 0xf800, mask6 = 0xffff;
- i >= 0;
- i--, mask1 <<= 1, mask2 <<= 1, mask3 <<= 1, mask4 <<= 1,
- mask5 <<= 1, mask6 = (mask6 << 1) | 1) {
- if ((s->hdlcrx.bitstream & mask1) == mask1)
- s->hdlcrx.rx_state = 0; /* abort received */
- else if ((s->hdlcrx.bitstream & mask2) == mask3) {
- /* flag received */
- if (s->hdlcrx.rx_state) {
- hdlc_rx_add_bytes(s, s->hdlcrx.bitbuf
- << (8+i),
- s->hdlcrx.numbits
- -8-i);
- hdlc_rx_flag(dev, s);
- }
- s->hdlcrx.len = 0;
- s->hdlcrx.bp = s->hdlcrx.buffer;
- s->hdlcrx.rx_state = 1;
- s->hdlcrx.numbits = i;
- } else if ((s->hdlcrx.bitstream & mask4) == mask5) {
- /* stuffed bit */
- s->hdlcrx.numbits--;
- s->hdlcrx.bitbuf = (s->hdlcrx.bitbuf & (~mask6)) |
- ((s->hdlcrx.bitbuf & mask6) << 1);
- }
- }
- s->hdlcrx.numbits -= hdlc_rx_add_bytes(s, s->hdlcrx.bitbuf,
- s->hdlcrx.numbits);
- }
- clear_bit(0, &s->hdlcrx.in_hdlc_rx);
-}
-
-/* ---------------------------------------------------------------------- */
-
-static inline void do_kiss_params(struct hdlcdrv_state *s,
- unsigned char *data, unsigned long len)
-{
-
-#ifdef KISS_VERBOSE
-#define PKP(a,b) printk(KERN_INFO "hdlcdrv.c: channel params: " a "\n", b)
-#else /* KISS_VERBOSE */
-#define PKP(a,b)
-#endif /* KISS_VERBOSE */
-
- if (len < 2)
- return;
- switch(data[0]) {
- case PARAM_TXDELAY:
- s->ch_params.tx_delay = data[1];
- PKP("TX delay = %ums", 10 * s->ch_params.tx_delay);
- break;
- case PARAM_PERSIST:
- s->ch_params.ppersist = data[1];
- PKP("p persistence = %u", s->ch_params.ppersist);
- break;
- case PARAM_SLOTTIME:
- s->ch_params.slottime = data[1];
- PKP("slot time = %ums", s->ch_params.slottime);
- break;
- case PARAM_TXTAIL:
- s->ch_params.tx_tail = data[1];
- PKP("TX tail = %ums", s->ch_params.tx_tail);
- break;
- case PARAM_FULLDUP:
- s->ch_params.fulldup = !!data[1];
- PKP("%s duplex", s->ch_params.fulldup ? "full" : "half");
- break;
- default:
- break;
- }
-#undef PKP
-}
-
-/* ---------------------------------------------------------------------- */
-
-void hdlcdrv_transmitter(struct net_device *dev, struct hdlcdrv_state *s)
-{
- unsigned int mask1, mask2, mask3;
- int i;
- struct sk_buff *skb;
- int pkt_len;
-
- if (!s || s->magic != HDLCDRV_MAGIC)
- return;
- if (test_and_set_bit(0, &s->hdlctx.in_hdlc_tx))
- return;
- for (;;) {
- if (s->hdlctx.numbits >= 16) {
- if (hdlcdrv_hbuf_full(&s->hdlctx.hbuf)) {
- clear_bit(0, &s->hdlctx.in_hdlc_tx);
- return;
- }
- hdlcdrv_hbuf_put(&s->hdlctx.hbuf, s->hdlctx.bitbuf);
- s->hdlctx.bitbuf >>= 16;
- s->hdlctx.numbits -= 16;
- }
- switch (s->hdlctx.tx_state) {
- default:
- clear_bit(0, &s->hdlctx.in_hdlc_tx);
- return;
- case 0:
- case 1:
- if (s->hdlctx.numflags) {
- s->hdlctx.numflags--;
- s->hdlctx.bitbuf |=
- 0x7e7e << s->hdlctx.numbits;
- s->hdlctx.numbits += 16;
- break;
- }
- if (s->hdlctx.tx_state == 1) {
- clear_bit(0, &s->hdlctx.in_hdlc_tx);
- return;
- }
- if (!(skb = s->skb)) {
- int flgs = tenms_to_2flags(s, s->ch_params.tx_tail);
- if (flgs < 2)
- flgs = 2;
- s->hdlctx.tx_state = 1;
- s->hdlctx.numflags = flgs;
- break;
- }
- s->skb = NULL;
- netif_wake_queue(dev);
- pkt_len = skb->len-1; /* strip KISS byte */
- if (pkt_len >= HDLCDRV_MAXFLEN || pkt_len < 2) {
- s->hdlctx.tx_state = 0;
- s->hdlctx.numflags = 1;
- dev_kfree_skb_irq(skb);
- break;
- }
- skb_copy_from_linear_data_offset(skb, 1,
- s->hdlctx.buffer,
- pkt_len);
- dev_kfree_skb_irq(skb);
- s->hdlctx.bp = s->hdlctx.buffer;
- append_crc_ccitt(s->hdlctx.buffer, pkt_len);
- s->hdlctx.len = pkt_len+2; /* the appended CRC */
- s->hdlctx.tx_state = 2;
- s->hdlctx.bitstream = 0;
- dev->stats.tx_packets++;
- break;
- case 2:
- if (!s->hdlctx.len) {
- s->hdlctx.tx_state = 0;
- s->hdlctx.numflags = 1;
- break;
- }
- s->hdlctx.len--;
- s->hdlctx.bitbuf |= *s->hdlctx.bp <<
- s->hdlctx.numbits;
- s->hdlctx.bitstream >>= 8;
- s->hdlctx.bitstream |= (*s->hdlctx.bp++) << 16;
- mask1 = 0x1f000;
- mask2 = 0x10000;
- mask3 = 0xffffffff >> (31-s->hdlctx.numbits);
- s->hdlctx.numbits += 8;
- for(i = 0; i < 8; i++, mask1 <<= 1, mask2 <<= 1,
- mask3 = (mask3 << 1) | 1) {
- if ((s->hdlctx.bitstream & mask1) != mask1)
- continue;
- s->hdlctx.bitstream &= ~mask2;
- s->hdlctx.bitbuf =
- (s->hdlctx.bitbuf & mask3) |
- ((s->hdlctx.bitbuf &
- (~mask3)) << 1);
- s->hdlctx.numbits++;
- mask3 = (mask3 << 1) | 1;
- }
- break;
- }
- }
-}
-
-/* ---------------------------------------------------------------------- */
-
-static void start_tx(struct net_device *dev, struct hdlcdrv_state *s)
-{
- s->hdlctx.tx_state = 0;
- s->hdlctx.numflags = tenms_to_2flags(s, s->ch_params.tx_delay);
- s->hdlctx.bitbuf = s->hdlctx.bitstream = s->hdlctx.numbits = 0;
- hdlcdrv_transmitter(dev, s);
- s->hdlctx.ptt = 1;
- s->ptt_keyed++;
-}
-
-/* ---------------------------------------------------------------------- */
-
-void hdlcdrv_arbitrate(struct net_device *dev, struct hdlcdrv_state *s)
-{
- if (!s || s->magic != HDLCDRV_MAGIC || s->hdlctx.ptt || !s->skb)
- return;
- if (s->ch_params.fulldup) {
- start_tx(dev, s);
- return;
- }
- if (s->hdlcrx.dcd) {
- s->hdlctx.slotcnt = s->ch_params.slottime;
- return;
- }
- if ((--s->hdlctx.slotcnt) > 0)
- return;
- s->hdlctx.slotcnt = s->ch_params.slottime;
- if (get_random_u8() > s->ch_params.ppersist)
- return;
- start_tx(dev, s);
-}
-
-/* --------------------------------------------------------------------- */
-/*
- * ===================== network driver interface =========================
- */
-
-static netdev_tx_t hdlcdrv_send_packet(struct sk_buff *skb,
- struct net_device *dev)
-{
- struct hdlcdrv_state *sm = netdev_priv(dev);
-
- if (skb->protocol == htons(ETH_P_IP))
- return ax25_ip_xmit(skb);
-
- if (skb->data[0] != 0) {
- do_kiss_params(sm, skb->data, skb->len);
- dev_kfree_skb(skb);
- return NETDEV_TX_OK;
- }
- if (sm->skb) {
- dev_kfree_skb(skb);
- return NETDEV_TX_OK;
- }
- netif_stop_queue(dev);
- sm->skb = skb;
- return NETDEV_TX_OK;
-}
-
-/* --------------------------------------------------------------------- */
-
-static int hdlcdrv_set_mac_address(struct net_device *dev, void *addr)
-{
- struct sockaddr *sa = (struct sockaddr *)addr;
-
- /* addr is an AX.25 shifted ASCII mac address */
- dev_addr_set(dev, sa->sa_data);
- return 0;
-}
-
-/* --------------------------------------------------------------------- */
-/*
- * Open/initialize the board. This is called (in the current kernel)
- * sometime after booting when the 'ifconfig' program is run.
- *
- * This routine should set everything up anew at each open, even
- * registers that "should" only need to be set once at boot, so that
- * there is non-reboot way to recover if something goes wrong.
- */
-
-static int hdlcdrv_open(struct net_device *dev)
-{
- struct hdlcdrv_state *s = netdev_priv(dev);
- int i;
-
- if (!s->ops || !s->ops->open)
- return -ENODEV;
-
- /*
- * initialise some variables
- */
- s->opened = 1;
- s->hdlcrx.hbuf.rd = s->hdlcrx.hbuf.wr = 0;
- s->hdlcrx.in_hdlc_rx = 0;
- s->hdlcrx.rx_state = 0;
-
- s->hdlctx.hbuf.rd = s->hdlctx.hbuf.wr = 0;
- s->hdlctx.in_hdlc_tx = 0;
- s->hdlctx.tx_state = 1;
- s->hdlctx.numflags = 0;
- s->hdlctx.bitstream = s->hdlctx.bitbuf = s->hdlctx.numbits = 0;
- s->hdlctx.ptt = 0;
- s->hdlctx.slotcnt = s->ch_params.slottime;
- s->hdlctx.calibrate = 0;
-
- i = s->ops->open(dev);
- if (i)
- return i;
- netif_start_queue(dev);
- return 0;
-}
-
-/* --------------------------------------------------------------------- */
-/*
- * The inverse routine to hdlcdrv_open().
- */
-
-static int hdlcdrv_close(struct net_device *dev)
-{
- struct hdlcdrv_state *s = netdev_priv(dev);
- int i = 0;
-
- netif_stop_queue(dev);
-
- if (s->ops && s->ops->close)
- i = s->ops->close(dev);
- dev_kfree_skb(s->skb);
- s->skb = NULL;
- s->opened = 0;
- return i;
-}
-
-/* --------------------------------------------------------------------- */
-
-static int hdlcdrv_siocdevprivate(struct net_device *dev, struct ifreq *ifr,
- void __user *data, int cmd)
-{
- struct hdlcdrv_state *s = netdev_priv(dev);
- struct hdlcdrv_ioctl bi;
-
- if (cmd != SIOCDEVPRIVATE)
- return -ENOIOCTLCMD;
-
- if (in_compat_syscall()) /* to be implemented */
- return -ENOIOCTLCMD;
-
- if (copy_from_user(&bi, data, sizeof(bi)))
- return -EFAULT;
-
- switch (bi.cmd) {
- default:
- if (s->ops && s->ops->ioctl)
- return s->ops->ioctl(dev, data, &bi, cmd);
- return -ENOIOCTLCMD;
-
- case HDLCDRVCTL_GETCHANNELPAR:
- bi.data.cp.tx_delay = s->ch_params.tx_delay;
- bi.data.cp.tx_tail = s->ch_params.tx_tail;
- bi.data.cp.slottime = s->ch_params.slottime;
- bi.data.cp.ppersist = s->ch_params.ppersist;
- bi.data.cp.fulldup = s->ch_params.fulldup;
- break;
-
- case HDLCDRVCTL_SETCHANNELPAR:
- if (!capable(CAP_NET_ADMIN))
- return -EACCES;
- s->ch_params.tx_delay = bi.data.cp.tx_delay;
- s->ch_params.tx_tail = bi.data.cp.tx_tail;
- s->ch_params.slottime = bi.data.cp.slottime;
- s->ch_params.ppersist = bi.data.cp.ppersist;
- s->ch_params.fulldup = bi.data.cp.fulldup;
- s->hdlctx.slotcnt = 1;
- return 0;
-
- case HDLCDRVCTL_GETMODEMPAR:
- bi.data.mp.iobase = dev->base_addr;
- bi.data.mp.irq = dev->irq;
- bi.data.mp.dma = dev->dma;
- bi.data.mp.dma2 = s->ptt_out.dma2;
- bi.data.mp.seriobase = s->ptt_out.seriobase;
- bi.data.mp.pariobase = s->ptt_out.pariobase;
- bi.data.mp.midiiobase = s->ptt_out.midiiobase;
- break;
-
- case HDLCDRVCTL_SETMODEMPAR:
- if ((!capable(CAP_SYS_RAWIO)) || netif_running(dev))
- return -EACCES;
- dev->base_addr = bi.data.mp.iobase;
- dev->irq = bi.data.mp.irq;
- dev->dma = bi.data.mp.dma;
- s->ptt_out.dma2 = bi.data.mp.dma2;
- s->ptt_out.seriobase = bi.data.mp.seriobase;
- s->ptt_out.pariobase = bi.data.mp.pariobase;
- s->ptt_out.midiiobase = bi.data.mp.midiiobase;
- return 0;
-
- case HDLCDRVCTL_GETSTAT:
- bi.data.cs.ptt = hdlcdrv_ptt(s);
- bi.data.cs.dcd = s->hdlcrx.dcd;
- bi.data.cs.ptt_keyed = s->ptt_keyed;
- bi.data.cs.tx_packets = dev->stats.tx_packets;
- bi.data.cs.tx_errors = dev->stats.tx_errors;
- bi.data.cs.rx_packets = dev->stats.rx_packets;
- bi.data.cs.rx_errors = dev->stats.rx_errors;
- break;
-
- case HDLCDRVCTL_OLDGETSTAT:
- bi.data.ocs.ptt = hdlcdrv_ptt(s);
- bi.data.ocs.dcd = s->hdlcrx.dcd;
- bi.data.ocs.ptt_keyed = s->ptt_keyed;
- break;
-
- case HDLCDRVCTL_CALIBRATE:
- if(!capable(CAP_SYS_RAWIO))
- return -EPERM;
- if (s->par.bitrate <= 0)
- return -EINVAL;
- if (bi.data.calibrate > INT_MAX / s->par.bitrate)
- return -EINVAL;
- s->hdlctx.calibrate = bi.data.calibrate * s->par.bitrate / 16;
- return 0;
-
- case HDLCDRVCTL_GETSAMPLES:
-#ifndef HDLCDRV_DEBUG
- return -EPERM;
-#else /* HDLCDRV_DEBUG */
- if (s->bitbuf_channel.rd == s->bitbuf_channel.wr)
- return -EAGAIN;
- bi.data.bits =
- s->bitbuf_channel.buffer[s->bitbuf_channel.rd];
- s->bitbuf_channel.rd = (s->bitbuf_channel.rd+1) %
- sizeof(s->bitbuf_channel.buffer);
- break;
-#endif /* HDLCDRV_DEBUG */
-
- case HDLCDRVCTL_GETBITS:
-#ifndef HDLCDRV_DEBUG
- return -EPERM;
-#else /* HDLCDRV_DEBUG */
- if (s->bitbuf_hdlc.rd == s->bitbuf_hdlc.wr)
- return -EAGAIN;
- bi.data.bits =
- s->bitbuf_hdlc.buffer[s->bitbuf_hdlc.rd];
- s->bitbuf_hdlc.rd = (s->bitbuf_hdlc.rd+1) %
- sizeof(s->bitbuf_hdlc.buffer);
- break;
-#endif /* HDLCDRV_DEBUG */
-
- case HDLCDRVCTL_DRIVERNAME:
- if (s->ops && s->ops->drvname) {
- strscpy(bi.data.drivername, s->ops->drvname,
- sizeof(bi.data.drivername));
- break;
- }
- bi.data.drivername[0] = '\0';
- break;
-
- }
- if (copy_to_user(data, &bi, sizeof(bi)))
- return -EFAULT;
- return 0;
-
-}
-
-/* --------------------------------------------------------------------- */
-
-static const struct net_device_ops hdlcdrv_netdev = {
- .ndo_open = hdlcdrv_open,
- .ndo_stop = hdlcdrv_close,
- .ndo_start_xmit = hdlcdrv_send_packet,
- .ndo_siocdevprivate = hdlcdrv_siocdevprivate,
- .ndo_set_mac_address = hdlcdrv_set_mac_address,
-};
-
-/*
- * Initialize fields in hdlcdrv
- */
-static void hdlcdrv_setup(struct net_device *dev)
-{
- static const struct hdlcdrv_channel_params dflt_ch_params = {
- 20, 2, 10, 40, 0
- };
- struct hdlcdrv_state *s = netdev_priv(dev);
-
- /*
- * initialize the hdlcdrv_state struct
- */
- s->ch_params = dflt_ch_params;
- s->ptt_keyed = 0;
-
- spin_lock_init(&s->hdlcrx.hbuf.lock);
- s->hdlcrx.hbuf.rd = s->hdlcrx.hbuf.wr = 0;
- s->hdlcrx.in_hdlc_rx = 0;
- s->hdlcrx.rx_state = 0;
-
- spin_lock_init(&s->hdlctx.hbuf.lock);
- s->hdlctx.hbuf.rd = s->hdlctx.hbuf.wr = 0;
- s->hdlctx.in_hdlc_tx = 0;
- s->hdlctx.tx_state = 1;
- s->hdlctx.numflags = 0;
- s->hdlctx.bitstream = s->hdlctx.bitbuf = s->hdlctx.numbits = 0;
- s->hdlctx.ptt = 0;
- s->hdlctx.slotcnt = s->ch_params.slottime;
- s->hdlctx.calibrate = 0;
-
-#ifdef HDLCDRV_DEBUG
- s->bitbuf_channel.rd = s->bitbuf_channel.wr = 0;
- s->bitbuf_channel.shreg = 0x80;
-
- s->bitbuf_hdlc.rd = s->bitbuf_hdlc.wr = 0;
- s->bitbuf_hdlc.shreg = 0x80;
-#endif /* HDLCDRV_DEBUG */
-
-
- /* Fill in the fields of the device structure */
-
- s->skb = NULL;
-
- dev->netdev_ops = &hdlcdrv_netdev;
- dev->header_ops = &ax25_header_ops;
-
- dev->type = ARPHRD_AX25; /* AF_AX25 device */
- dev->hard_header_len = AX25_MAX_HEADER_LEN + AX25_BPQ_HEADER_LEN;
- dev->mtu = AX25_DEF_PACLEN; /* eth_mtu is the default */
- dev->addr_len = AX25_ADDR_LEN; /* sizeof an ax.25 address */
- memcpy(dev->broadcast, &ax25_bcast, AX25_ADDR_LEN);
- dev_addr_set(dev, (u8 *)&ax25_defaddr);
- dev->tx_queue_len = 16;
-}
-
-/* --------------------------------------------------------------------- */
-struct net_device *hdlcdrv_register(const struct hdlcdrv_ops *ops,
- unsigned int privsize, const char *ifname,
- unsigned int baseaddr, unsigned int irq,
- unsigned int dma)
-{
- struct net_device *dev;
- struct hdlcdrv_state *s;
- int err;
-
- if (privsize < sizeof(struct hdlcdrv_state))
- privsize = sizeof(struct hdlcdrv_state);
-
- dev = alloc_netdev(privsize, ifname, NET_NAME_UNKNOWN, hdlcdrv_setup);
- if (!dev)
- return ERR_PTR(-ENOMEM);
-
- /*
- * initialize part of the hdlcdrv_state struct
- */
- s = netdev_priv(dev);
- s->magic = HDLCDRV_MAGIC;
- s->ops = ops;
- dev->base_addr = baseaddr;
- dev->irq = irq;
- dev->dma = dma;
-
- err = register_netdev(dev);
- if (err < 0) {
- printk(KERN_WARNING "hdlcdrv: cannot register net "
- "device %s\n", dev->name);
- free_netdev(dev);
- dev = ERR_PTR(err);
- }
- return dev;
-}
-
-/* --------------------------------------------------------------------- */
-
-void hdlcdrv_unregister(struct net_device *dev)
-{
- struct hdlcdrv_state *s = netdev_priv(dev);
-
- BUG_ON(s->magic != HDLCDRV_MAGIC);
-
- if (s->opened && s->ops->close)
- s->ops->close(dev);
- unregister_netdev(dev);
-
- free_netdev(dev);
-}
-
-/* --------------------------------------------------------------------- */
-
-EXPORT_SYMBOL(hdlcdrv_receiver);
-EXPORT_SYMBOL(hdlcdrv_transmitter);
-EXPORT_SYMBOL(hdlcdrv_arbitrate);
-EXPORT_SYMBOL(hdlcdrv_register);
-EXPORT_SYMBOL(hdlcdrv_unregister);
-
-/* --------------------------------------------------------------------- */
-
-MODULE_AUTHOR("Thomas M. Sailer, sailer@ife.ee.ethz.ch, hb9jnx@hb9w.che.eu");
-MODULE_DESCRIPTION("Packet Radio network interface HDLC encoder/decoder");
-MODULE_LICENSE("GPL");
+++ /dev/null
-// SPDX-License-Identifier: GPL-2.0-only
-/*
- *
- * Copyright (C) Hans Alblas PE1AYX <hans@esrac.ele.tue.nl>
- * Copyright (C) 2004, 05 Ralf Baechle DL5RB <ralf@linux-mips.org>
- * Copyright (C) 2004, 05 Thomas Osterried DL9SAU <thomas@x-berg.in-berlin.de>
- */
-#include <linux/module.h>
-#include <linux/bitops.h>
-#include <linux/uaccess.h>
-#include <linux/crc16.h>
-#include <linux/string.h>
-#include <linux/mm.h>
-#include <linux/interrupt.h>
-#include <linux/in.h>
-#include <linux/inet.h>
-#include <linux/slab.h>
-#include <linux/tty.h>
-#include <linux/errno.h>
-#include <linux/netdevice.h>
-#include <linux/major.h>
-#include <linux/init.h>
-#include <linux/rtnetlink.h>
-#include <linux/etherdevice.h>
-#include <linux/skbuff.h>
-#include <linux/if_arp.h>
-#include <linux/jiffies.h>
-#include <linux/refcount.h>
-
-#include <net/ax25.h>
-
-#define AX_MTU 236
-
-/* some arch define END as assembly function ending, just undef it */
-#undef END
-/* SLIP/KISS protocol characters. */
-#define END 0300 /* indicates end of frame */
-#define ESC 0333 /* indicates byte stuffing */
-#define ESC_END 0334 /* ESC ESC_END means END 'data' */
-#define ESC_ESC 0335 /* ESC ESC_ESC means ESC 'data' */
-
-struct mkiss {
- struct tty_struct *tty; /* ptr to TTY structure */
- struct net_device *dev; /* easy for intr handling */
-
- /* These are pointers to the malloc()ed frame buffers. */
- spinlock_t buflock;/* lock for rbuf and xbuf */
- unsigned char *rbuff; /* receiver buffer */
- int rcount; /* received chars counter */
- unsigned char *xbuff; /* transmitter buffer */
- unsigned char *xhead; /* pointer to next byte to XMIT */
- int xleft; /* bytes left in XMIT queue */
-
- /* Detailed SLIP statistics. */
- int mtu; /* Our mtu (to spot changes!) */
- int buffsize; /* Max buffers sizes */
-
- unsigned long flags; /* Flag values/ mode etc */
- /* long req'd: used by set_bit --RR */
-#define AXF_INUSE 0 /* Channel in use */
-#define AXF_ESCAPE 1 /* ESC received */
-#define AXF_ERROR 2 /* Parity, etc. error */
-#define AXF_KEEPTEST 3 /* Keepalive test flag */
-#define AXF_OUTWAIT 4 /* is outpacket was flag */
-
- int mode;
- int crcmode; /* MW: for FlexNet, SMACK etc. */
- int crcauto; /* CRC auto mode */
-
-#define CRC_MODE_NONE 0
-#define CRC_MODE_FLEX 1
-#define CRC_MODE_SMACK 2
-#define CRC_MODE_FLEX_TEST 3
-#define CRC_MODE_SMACK_TEST 4
-
- refcount_t refcnt;
- struct completion dead;
-};
-
-/*---------------------------------------------------------------------------*/
-
-static const unsigned short crc_flex_table[] = {
- 0x0f87, 0x1e0e, 0x2c95, 0x3d1c, 0x49a3, 0x582a, 0x6ab1, 0x7b38,
- 0x83cf, 0x9246, 0xa0dd, 0xb154, 0xc5eb, 0xd462, 0xe6f9, 0xf770,
- 0x1f06, 0x0e8f, 0x3c14, 0x2d9d, 0x5922, 0x48ab, 0x7a30, 0x6bb9,
- 0x934e, 0x82c7, 0xb05c, 0xa1d5, 0xd56a, 0xc4e3, 0xf678, 0xe7f1,
- 0x2e85, 0x3f0c, 0x0d97, 0x1c1e, 0x68a1, 0x7928, 0x4bb3, 0x5a3a,
- 0xa2cd, 0xb344, 0x81df, 0x9056, 0xe4e9, 0xf560, 0xc7fb, 0xd672,
- 0x3e04, 0x2f8d, 0x1d16, 0x0c9f, 0x7820, 0x69a9, 0x5b32, 0x4abb,
- 0xb24c, 0xa3c5, 0x915e, 0x80d7, 0xf468, 0xe5e1, 0xd77a, 0xc6f3,
- 0x4d83, 0x5c0a, 0x6e91, 0x7f18, 0x0ba7, 0x1a2e, 0x28b5, 0x393c,
- 0xc1cb, 0xd042, 0xe2d9, 0xf350, 0x87ef, 0x9666, 0xa4fd, 0xb574,
- 0x5d02, 0x4c8b, 0x7e10, 0x6f99, 0x1b26, 0x0aaf, 0x3834, 0x29bd,
- 0xd14a, 0xc0c3, 0xf258, 0xe3d1, 0x976e, 0x86e7, 0xb47c, 0xa5f5,
- 0x6c81, 0x7d08, 0x4f93, 0x5e1a, 0x2aa5, 0x3b2c, 0x09b7, 0x183e,
- 0xe0c9, 0xf140, 0xc3db, 0xd252, 0xa6ed, 0xb764, 0x85ff, 0x9476,
- 0x7c00, 0x6d89, 0x5f12, 0x4e9b, 0x3a24, 0x2bad, 0x1936, 0x08bf,
- 0xf048, 0xe1c1, 0xd35a, 0xc2d3, 0xb66c, 0xa7e5, 0x957e, 0x84f7,
- 0x8b8f, 0x9a06, 0xa89d, 0xb914, 0xcdab, 0xdc22, 0xeeb9, 0xff30,
- 0x07c7, 0x164e, 0x24d5, 0x355c, 0x41e3, 0x506a, 0x62f1, 0x7378,
- 0x9b0e, 0x8a87, 0xb81c, 0xa995, 0xdd2a, 0xcca3, 0xfe38, 0xefb1,
- 0x1746, 0x06cf, 0x3454, 0x25dd, 0x5162, 0x40eb, 0x7270, 0x63f9,
- 0xaa8d, 0xbb04, 0x899f, 0x9816, 0xeca9, 0xfd20, 0xcfbb, 0xde32,
- 0x26c5, 0x374c, 0x05d7, 0x145e, 0x60e1, 0x7168, 0x43f3, 0x527a,
- 0xba0c, 0xab85, 0x991e, 0x8897, 0xfc28, 0xeda1, 0xdf3a, 0xceb3,
- 0x3644, 0x27cd, 0x1556, 0x04df, 0x7060, 0x61e9, 0x5372, 0x42fb,
- 0xc98b, 0xd802, 0xea99, 0xfb10, 0x8faf, 0x9e26, 0xacbd, 0xbd34,
- 0x45c3, 0x544a, 0x66d1, 0x7758, 0x03e7, 0x126e, 0x20f5, 0x317c,
- 0xd90a, 0xc883, 0xfa18, 0xeb91, 0x9f2e, 0x8ea7, 0xbc3c, 0xadb5,
- 0x5542, 0x44cb, 0x7650, 0x67d9, 0x1366, 0x02ef, 0x3074, 0x21fd,
- 0xe889, 0xf900, 0xcb9b, 0xda12, 0xaead, 0xbf24, 0x8dbf, 0x9c36,
- 0x64c1, 0x7548, 0x47d3, 0x565a, 0x22e5, 0x336c, 0x01f7, 0x107e,
- 0xf808, 0xe981, 0xdb1a, 0xca93, 0xbe2c, 0xafa5, 0x9d3e, 0x8cb7,
- 0x7440, 0x65c9, 0x5752, 0x46db, 0x3264, 0x23ed, 0x1176, 0x00ff
-};
-
-static unsigned short calc_crc_flex(unsigned char *cp, int size)
-{
- unsigned short crc = 0xffff;
-
- while (size--)
- crc = (crc << 8) ^ crc_flex_table[((crc >> 8) ^ *cp++) & 0xff];
-
- return crc;
-}
-
-static int check_crc_flex(unsigned char *cp, int size)
-{
- unsigned short crc = 0xffff;
-
- if (size < 3)
- return -1;
-
- while (size--)
- crc = (crc << 8) ^ crc_flex_table[((crc >> 8) ^ *cp++) & 0xff];
-
- if ((crc & 0xffff) != 0x7070)
- return -1;
-
- return 0;
-}
-
-static int check_crc_16(unsigned char *cp, int size)
-{
- unsigned short crc = 0x0000;
-
- if (size < 3)
- return -1;
-
- crc = crc16(0, cp, size);
-
- if (crc != 0x0000)
- return -1;
-
- return 0;
-}
-
-/*
- * Standard encapsulation
- */
-
-static int kiss_esc(unsigned char *s, unsigned char *d, int len)
-{
- unsigned char *ptr = d;
- unsigned char c;
-
- /*
- * Send an initial END character to flush out any data that may have
- * accumulated in the receiver due to line noise.
- */
-
- *ptr++ = END;
-
- while (len-- > 0) {
- switch (c = *s++) {
- case END:
- *ptr++ = ESC;
- *ptr++ = ESC_END;
- break;
- case ESC:
- *ptr++ = ESC;
- *ptr++ = ESC_ESC;
- break;
- default:
- *ptr++ = c;
- break;
- }
- }
-
- *ptr++ = END;
-
- return ptr - d;
-}
-
-/*
- * MW:
- * OK its ugly, but tell me a better solution without copying the
- * packet to a temporary buffer :-)
- */
-static int kiss_esc_crc(unsigned char *s, unsigned char *d, unsigned short crc,
- int len)
-{
- unsigned char *ptr = d;
- unsigned char c=0;
-
- *ptr++ = END;
- while (len > 0) {
- if (len > 2)
- c = *s++;
- else if (len > 1)
- c = crc >> 8;
- else
- c = crc & 0xff;
-
- len--;
-
- switch (c) {
- case END:
- *ptr++ = ESC;
- *ptr++ = ESC_END;
- break;
- case ESC:
- *ptr++ = ESC;
- *ptr++ = ESC_ESC;
- break;
- default:
- *ptr++ = c;
- break;
- }
- }
- *ptr++ = END;
-
- return ptr - d;
-}
-
-/* Send one completely decapsulated AX.25 packet to the AX.25 layer. */
-static void ax_bump(struct mkiss *ax)
-{
- struct sk_buff *skb;
- int count;
-
- spin_lock_bh(&ax->buflock);
- if (ax->rbuff[0] > 0x0f) {
- if (ax->rbuff[0] & 0x80) {
- if (check_crc_16(ax->rbuff, ax->rcount) < 0) {
- ax->dev->stats.rx_errors++;
- spin_unlock_bh(&ax->buflock);
-
- return;
- }
- if (ax->crcmode != CRC_MODE_SMACK && ax->crcauto) {
- printk(KERN_INFO
- "mkiss: %s: Switching to crc-smack\n",
- ax->dev->name);
- ax->crcmode = CRC_MODE_SMACK;
- }
- ax->rcount -= 2;
- *ax->rbuff &= ~0x80;
- } else if (ax->rbuff[0] & 0x20) {
- if (check_crc_flex(ax->rbuff, ax->rcount) < 0) {
- ax->dev->stats.rx_errors++;
- spin_unlock_bh(&ax->buflock);
- return;
- }
- if (ax->crcmode != CRC_MODE_FLEX && ax->crcauto) {
- printk(KERN_INFO
- "mkiss: %s: Switching to crc-flexnet\n",
- ax->dev->name);
- ax->crcmode = CRC_MODE_FLEX;
- }
- ax->rcount -= 2;
-
- /*
- * dl9sau bugfix: the trailling two bytes flexnet crc
- * will not be passed to the kernel. thus we have to
- * correct the kissparm signature, because it indicates
- * a crc but there's none
- */
- *ax->rbuff &= ~0x20;
- }
- }
-
- count = ax->rcount;
-
- if ((skb = dev_alloc_skb(count)) == NULL) {
- printk(KERN_ERR "mkiss: %s: memory squeeze, dropping packet.\n",
- ax->dev->name);
- ax->dev->stats.rx_dropped++;
- spin_unlock_bh(&ax->buflock);
- return;
- }
-
- skb_put_data(skb, ax->rbuff, count);
- skb->protocol = ax25_type_trans(skb, ax->dev);
- netif_rx(skb);
- ax->dev->stats.rx_packets++;
- ax->dev->stats.rx_bytes += count;
- spin_unlock_bh(&ax->buflock);
-}
-
-static void kiss_unesc(struct mkiss *ax, unsigned char s)
-{
- switch (s) {
- case END:
- /* drop keeptest bit = VSV */
- if (test_bit(AXF_KEEPTEST, &ax->flags))
- clear_bit(AXF_KEEPTEST, &ax->flags);
-
- if (!test_and_clear_bit(AXF_ERROR, &ax->flags) && (ax->rcount > 2))
- ax_bump(ax);
-
- clear_bit(AXF_ESCAPE, &ax->flags);
- ax->rcount = 0;
- return;
-
- case ESC:
- set_bit(AXF_ESCAPE, &ax->flags);
- return;
- case ESC_ESC:
- if (test_and_clear_bit(AXF_ESCAPE, &ax->flags))
- s = ESC;
- break;
- case ESC_END:
- if (test_and_clear_bit(AXF_ESCAPE, &ax->flags))
- s = END;
- break;
- }
-
- spin_lock_bh(&ax->buflock);
- if (!test_bit(AXF_ERROR, &ax->flags)) {
- if (ax->rcount < ax->buffsize) {
- ax->rbuff[ax->rcount++] = s;
- spin_unlock_bh(&ax->buflock);
- return;
- }
-
- ax->dev->stats.rx_over_errors++;
- set_bit(AXF_ERROR, &ax->flags);
- }
- spin_unlock_bh(&ax->buflock);
-}
-
-static int ax_set_mac_address(struct net_device *dev, void *addr)
-{
- struct sockaddr_ax25 *sa = addr;
-
- netif_tx_lock_bh(dev);
- netif_addr_lock(dev);
- __dev_addr_set(dev, &sa->sax25_call, AX25_ADDR_LEN);
- netif_addr_unlock(dev);
- netif_tx_unlock_bh(dev);
-
- return 0;
-}
-
-/*---------------------------------------------------------------------------*/
-
-static void ax_changedmtu(struct mkiss *ax)
-{
- struct net_device *dev = ax->dev;
- unsigned char *xbuff, *rbuff, *oxbuff, *orbuff;
- int len;
-
- len = dev->mtu * 2;
-
- /*
- * allow for arrival of larger UDP packets, even if we say not to
- * also fixes a bug in which SunOS sends 512-byte packets even with
- * an MSS of 128
- */
- if (len < 576 * 2)
- len = 576 * 2;
-
- xbuff = kmalloc(len + 4, GFP_ATOMIC);
- rbuff = kmalloc(len + 4, GFP_ATOMIC);
-
- if (xbuff == NULL || rbuff == NULL) {
- printk(KERN_ERR "mkiss: %s: unable to grow ax25 buffers, "
- "MTU change cancelled.\n",
- ax->dev->name);
- dev->mtu = ax->mtu;
- kfree(xbuff);
- kfree(rbuff);
- return;
- }
-
- spin_lock_bh(&ax->buflock);
-
- oxbuff = ax->xbuff;
- ax->xbuff = xbuff;
- orbuff = ax->rbuff;
- ax->rbuff = rbuff;
-
- if (ax->xleft) {
- if (ax->xleft <= len) {
- memcpy(ax->xbuff, ax->xhead, ax->xleft);
- } else {
- ax->xleft = 0;
- dev->stats.tx_dropped++;
- }
- }
-
- ax->xhead = ax->xbuff;
-
- if (ax->rcount) {
- if (ax->rcount <= len) {
- memcpy(ax->rbuff, orbuff, ax->rcount);
- } else {
- ax->rcount = 0;
- dev->stats.rx_over_errors++;
- set_bit(AXF_ERROR, &ax->flags);
- }
- }
-
- ax->mtu = dev->mtu + 73;
- ax->buffsize = len;
-
- spin_unlock_bh(&ax->buflock);
-
- kfree(oxbuff);
- kfree(orbuff);
-}
-
-/* Encapsulate one AX.25 packet and stuff into a TTY queue. */
-static void ax_encaps(struct net_device *dev, unsigned char *icp, int len)
-{
- struct mkiss *ax = netdev_priv(dev);
- unsigned char *p;
- int actual, count;
-
- if (ax->mtu != ax->dev->mtu + 73) /* Someone has been ifconfigging */
- ax_changedmtu(ax);
-
- if (len > ax->mtu) { /* Sigh, shouldn't occur BUT ... */
- printk(KERN_ERR "mkiss: %s: truncating oversized transmit packet!\n", ax->dev->name);
- dev->stats.tx_dropped++;
- netif_start_queue(dev);
- return;
- }
-
- p = icp;
-
- spin_lock_bh(&ax->buflock);
- if ((*p & 0x0f) != 0) {
- /* Configuration Command (kissparms(1).
- * Protocol spec says: never append CRC.
- * This fixes a very old bug in the linux
- * kiss driver. -- dl9sau */
- switch (*p & 0xff) {
- case 0x85:
- /* command from userspace especially for us,
- * not for delivery to the tnc */
- if (len > 1) {
- int cmd = (p[1] & 0xff);
- switch(cmd) {
- case 3:
- ax->crcmode = CRC_MODE_SMACK;
- break;
- case 2:
- ax->crcmode = CRC_MODE_FLEX;
- break;
- case 1:
- ax->crcmode = CRC_MODE_NONE;
- break;
- case 0:
- default:
- ax->crcmode = CRC_MODE_SMACK_TEST;
- cmd = 0;
- }
- ax->crcauto = (cmd ? 0 : 1);
- printk(KERN_INFO "mkiss: %s: crc mode set to %d\n",
- ax->dev->name, cmd);
- }
- spin_unlock_bh(&ax->buflock);
- netif_start_queue(dev);
-
- return;
- default:
- count = kiss_esc(p, ax->xbuff, len);
- }
- } else {
- unsigned short crc;
- switch (ax->crcmode) {
- case CRC_MODE_SMACK_TEST:
- ax->crcmode = CRC_MODE_FLEX_TEST;
- printk(KERN_INFO "mkiss: %s: Trying crc-smack\n", ax->dev->name);
- fallthrough;
- case CRC_MODE_SMACK:
- *p |= 0x80;
- crc = swab16(crc16(0, p, len));
- count = kiss_esc_crc(p, ax->xbuff, crc, len+2);
- break;
- case CRC_MODE_FLEX_TEST:
- ax->crcmode = CRC_MODE_NONE;
- printk(KERN_INFO "mkiss: %s: Trying crc-flexnet\n", ax->dev->name);
- fallthrough;
- case CRC_MODE_FLEX:
- *p |= 0x20;
- crc = calc_crc_flex(p, len);
- count = kiss_esc_crc(p, ax->xbuff, crc, len+2);
- break;
-
- default:
- count = kiss_esc(p, ax->xbuff, len);
- }
- }
- spin_unlock_bh(&ax->buflock);
-
- set_bit(TTY_DO_WRITE_WAKEUP, &ax->tty->flags);
- actual = ax->tty->ops->write(ax->tty, ax->xbuff, count);
- dev->stats.tx_packets++;
- dev->stats.tx_bytes += actual;
-
- netif_trans_update(ax->dev);
- ax->xleft = count - actual;
- ax->xhead = ax->xbuff + actual;
-}
-
-/* Encapsulate an AX.25 packet and kick it into a TTY queue. */
-static netdev_tx_t ax_xmit(struct sk_buff *skb, struct net_device *dev)
-{
- struct mkiss *ax = netdev_priv(dev);
-
- if (skb->protocol == htons(ETH_P_IP))
- return ax25_ip_xmit(skb);
-
- if (!netif_running(dev)) {
- printk(KERN_ERR "mkiss: %s: xmit call when iface is down\n", dev->name);
- return NETDEV_TX_BUSY;
- }
-
- if (netif_queue_stopped(dev)) {
- /*
- * May be we must check transmitter timeout here ?
- * 14 Oct 1994 Dmitry Gorodchanin.
- */
- if (time_before(jiffies, dev_trans_start(dev) + 20 * HZ)) {
- /* 20 sec timeout not reached */
- return NETDEV_TX_BUSY;
- }
-
- printk(KERN_ERR "mkiss: %s: transmit timed out, %s?\n", dev->name,
- (tty_chars_in_buffer(ax->tty) || ax->xleft) ?
- "bad line quality" : "driver error");
-
- ax->xleft = 0;
- clear_bit(TTY_DO_WRITE_WAKEUP, &ax->tty->flags);
- netif_start_queue(dev);
- }
-
- /* We were not busy, so we are now... :-) */
- netif_stop_queue(dev);
- ax_encaps(dev, skb->data, skb->len);
- kfree_skb(skb);
-
- return NETDEV_TX_OK;
-}
-
-static int ax_open_dev(struct net_device *dev)
-{
- struct mkiss *ax = netdev_priv(dev);
-
- if (ax->tty == NULL)
- return -ENODEV;
-
- return 0;
-}
-
-/* Open the low-level part of the AX25 channel. Easy! */
-static int ax_open(struct net_device *dev)
-{
- struct mkiss *ax = netdev_priv(dev);
- unsigned long len;
-
- if (ax->tty == NULL)
- return -ENODEV;
-
- /*
- * Allocate the frame buffers:
- *
- * rbuff Receive buffer.
- * xbuff Transmit buffer.
- */
- len = dev->mtu * 2;
-
- /*
- * allow for arrival of larger UDP packets, even if we say not to
- * also fixes a bug in which SunOS sends 512-byte packets even with
- * an MSS of 128
- */
- if (len < 576 * 2)
- len = 576 * 2;
-
- if ((ax->rbuff = kmalloc(len + 4, GFP_KERNEL)) == NULL)
- goto norbuff;
-
- if ((ax->xbuff = kmalloc(len + 4, GFP_KERNEL)) == NULL)
- goto noxbuff;
-
- ax->mtu = dev->mtu + 73;
- ax->buffsize = len;
- ax->rcount = 0;
- ax->xleft = 0;
-
- ax->flags &= (1 << AXF_INUSE); /* Clear ESCAPE & ERROR flags */
-
- spin_lock_init(&ax->buflock);
-
- return 0;
-
-noxbuff:
- kfree(ax->rbuff);
-
-norbuff:
- return -ENOMEM;
-}
-
-
-/* Close the low-level part of the AX25 channel. Easy! */
-static int ax_close(struct net_device *dev)
-{
- struct mkiss *ax = netdev_priv(dev);
-
- if (ax->tty)
- clear_bit(TTY_DO_WRITE_WAKEUP, &ax->tty->flags);
-
- netif_stop_queue(dev);
-
- return 0;
-}
-
-static const struct net_device_ops ax_netdev_ops = {
- .ndo_open = ax_open_dev,
- .ndo_stop = ax_close,
- .ndo_start_xmit = ax_xmit,
- .ndo_set_mac_address = ax_set_mac_address,
-};
-
-static void ax_setup(struct net_device *dev)
-{
- /* Finish setting up the DEVICE info. */
- dev->mtu = AX_MTU;
- dev->hard_header_len = AX25_MAX_HEADER_LEN;
- dev->addr_len = AX25_ADDR_LEN;
- dev->type = ARPHRD_AX25;
- dev->tx_queue_len = 10;
- dev->header_ops = &ax25_header_ops;
- dev->netdev_ops = &ax_netdev_ops;
-
-
- memcpy(dev->broadcast, &ax25_bcast, AX25_ADDR_LEN);
- dev_addr_set(dev, (u8 *)&ax25_defaddr);
-
- dev->flags = IFF_BROADCAST | IFF_MULTICAST;
-}
-
-/*
- * We have a potential race on dereferencing tty->disc_data, because the tty
- * layer provides no locking at all - thus one cpu could be running
- * sixpack_receive_buf while another calls sixpack_close, which zeroes
- * tty->disc_data and frees the memory that sixpack_receive_buf is using. The
- * best way to fix this is to use a rwlock in the tty struct, but for now we
- * use a single global rwlock for all ttys in ppp line discipline.
- */
-static DEFINE_RWLOCK(disc_data_lock);
-
-static struct mkiss *mkiss_get(struct tty_struct *tty)
-{
- struct mkiss *ax;
-
- read_lock(&disc_data_lock);
- ax = tty->disc_data;
- if (ax)
- refcount_inc(&ax->refcnt);
- read_unlock(&disc_data_lock);
-
- return ax;
-}
-
-static void mkiss_put(struct mkiss *ax)
-{
- if (refcount_dec_and_test(&ax->refcnt))
- complete(&ax->dead);
-}
-
-static int crc_force = 0; /* Can be overridden with insmod */
-
-static int mkiss_open(struct tty_struct *tty)
-{
- struct net_device *dev;
- struct mkiss *ax;
- int err;
-
- if (!capable(CAP_NET_ADMIN))
- return -EPERM;
- if (tty->ops->write == NULL)
- return -EOPNOTSUPP;
-
- dev = alloc_netdev(sizeof(struct mkiss), "ax%d", NET_NAME_UNKNOWN,
- ax_setup);
- if (!dev) {
- err = -ENOMEM;
- goto out;
- }
-
- ax = netdev_priv(dev);
- ax->dev = dev;
-
- spin_lock_init(&ax->buflock);
- refcount_set(&ax->refcnt, 1);
- init_completion(&ax->dead);
-
- ax->tty = tty;
- tty->disc_data = ax;
- tty->receive_room = 65535;
-
- tty_driver_flush_buffer(tty);
-
- /* Restore default settings */
- dev->type = ARPHRD_AX25;
-
- /* Perform the low-level AX25 initialization. */
- err = ax_open(ax->dev);
- if (err)
- goto out_free_netdev;
-
- err = register_netdev(dev);
- if (err)
- goto out_free_buffers;
-
- /* after register_netdev() - because else printk smashes the kernel */
- switch (crc_force) {
- case 3:
- ax->crcmode = CRC_MODE_SMACK;
- printk(KERN_INFO "mkiss: %s: crc mode smack forced.\n",
- ax->dev->name);
- break;
- case 2:
- ax->crcmode = CRC_MODE_FLEX;
- printk(KERN_INFO "mkiss: %s: crc mode flexnet forced.\n",
- ax->dev->name);
- break;
- case 1:
- ax->crcmode = CRC_MODE_NONE;
- printk(KERN_INFO "mkiss: %s: crc mode disabled.\n",
- ax->dev->name);
- break;
- case 0:
- default:
- crc_force = 0;
- printk(KERN_INFO "mkiss: %s: crc mode is auto.\n",
- ax->dev->name);
- ax->crcmode = CRC_MODE_SMACK_TEST;
- }
- ax->crcauto = (crc_force ? 0 : 1);
-
- netif_start_queue(dev);
-
- /* Done. We have linked the TTY line to a channel. */
- return 0;
-
-out_free_buffers:
- kfree(ax->rbuff);
- kfree(ax->xbuff);
-
-out_free_netdev:
- free_netdev(dev);
-
-out:
- return err;
-}
-
-static void mkiss_close(struct tty_struct *tty)
-{
- struct mkiss *ax;
-
- write_lock_irq(&disc_data_lock);
- ax = tty->disc_data;
- tty->disc_data = NULL;
- write_unlock_irq(&disc_data_lock);
-
- if (!ax)
- return;
-
- /*
- * We have now ensured that nobody can start using ap from now on, but
- * we have to wait for all existing users to finish.
- */
- if (!refcount_dec_and_test(&ax->refcnt))
- wait_for_completion(&ax->dead);
- /*
- * Halt the transmit queue so that a new transmit cannot scribble
- * on our buffers
- */
- netif_stop_queue(ax->dev);
-
- unregister_netdev(ax->dev);
-
- /* Free all AX25 frame buffers after unreg. */
- kfree(ax->rbuff);
- kfree(ax->xbuff);
-
- ax->tty = NULL;
-
- free_netdev(ax->dev);
-}
-
-/* Perform I/O control on an active ax25 channel. */
-static int mkiss_ioctl(struct tty_struct *tty, unsigned int cmd,
- unsigned long arg)
-{
- struct mkiss *ax = mkiss_get(tty);
- struct net_device *dev;
- unsigned int tmp, err;
-
- /* First make sure we're connected. */
- if (ax == NULL)
- return -ENXIO;
- dev = ax->dev;
-
- switch (cmd) {
- case SIOCGIFNAME:
- err = copy_to_user((void __user *) arg, ax->dev->name,
- strlen(ax->dev->name) + 1) ? -EFAULT : 0;
- break;
-
- case SIOCGIFENCAP:
- err = put_user(4, (int __user *) arg);
- break;
-
- case SIOCSIFENCAP:
- if (get_user(tmp, (int __user *) arg)) {
- err = -EFAULT;
- break;
- }
-
- ax->mode = tmp;
- dev->addr_len = AX25_ADDR_LEN;
- dev->hard_header_len = AX25_KISS_HEADER_LEN +
- AX25_MAX_HEADER_LEN + 3;
- dev->type = ARPHRD_AX25;
-
- err = 0;
- break;
-
- case SIOCSIFHWADDR: {
- char addr[AX25_ADDR_LEN];
-
- if (copy_from_user(&addr,
- (void __user *) arg, AX25_ADDR_LEN)) {
- err = -EFAULT;
- break;
- }
-
- netif_tx_lock_bh(dev);
- __dev_addr_set(dev, addr, AX25_ADDR_LEN);
- netif_tx_unlock_bh(dev);
-
- err = 0;
- break;
- }
- default:
- err = -ENOIOCTLCMD;
- }
-
- mkiss_put(ax);
-
- return err;
-}
-
-/*
- * Handle the 'receiver data ready' interrupt.
- * This function is called by the 'tty_io' module in the kernel when
- * a block of data has been received, which can now be decapsulated
- * and sent on to the AX.25 layer for further processing.
- */
-static void mkiss_receive_buf(struct tty_struct *tty, const u8 *cp,
- const u8 *fp, size_t count)
-{
- struct mkiss *ax = mkiss_get(tty);
-
- if (!ax)
- return;
-
- /*
- * Argh! mtu change time! - costs us the packet part received
- * at the change
- */
- if (ax->mtu != ax->dev->mtu + 73)
- ax_changedmtu(ax);
-
- /* Read the characters out of the buffer */
- while (count--) {
- if (fp != NULL && *fp++) {
- if (!test_and_set_bit(AXF_ERROR, &ax->flags))
- ax->dev->stats.rx_errors++;
- cp++;
- continue;
- }
-
- kiss_unesc(ax, *cp++);
- }
-
- mkiss_put(ax);
- tty_unthrottle(tty);
-}
-
-/*
- * Called by the driver when there's room for more data. If we have
- * more packets to send, we send them here.
- */
-static void mkiss_write_wakeup(struct tty_struct *tty)
-{
- struct mkiss *ax = mkiss_get(tty);
- int actual;
-
- if (!ax)
- return;
-
- if (ax->xleft <= 0) {
- /* Now serial buffer is almost free & we can start
- * transmission of another packet
- */
- clear_bit(TTY_DO_WRITE_WAKEUP, &tty->flags);
-
- netif_wake_queue(ax->dev);
- goto out;
- }
-
- actual = tty->ops->write(tty, ax->xhead, ax->xleft);
- ax->xleft -= actual;
- ax->xhead += actual;
-
-out:
- mkiss_put(ax);
-}
-
-static struct tty_ldisc_ops ax_ldisc = {
- .owner = THIS_MODULE,
- .num = N_AX25,
- .name = "mkiss",
- .open = mkiss_open,
- .close = mkiss_close,
- .ioctl = mkiss_ioctl,
- .receive_buf = mkiss_receive_buf,
- .write_wakeup = mkiss_write_wakeup
-};
-
-static const char banner[] __initconst = KERN_INFO \
- "mkiss: AX.25 Multikiss, Hans Albas PE1AYX\n";
-static const char msg_regfail[] __initconst = KERN_ERR \
- "mkiss: can't register line discipline (err = %d)\n";
-
-static int __init mkiss_init_driver(void)
-{
- int status;
-
- printk(banner);
-
- status = tty_register_ldisc(&ax_ldisc);
- if (status != 0)
- printk(msg_regfail, status);
-
- return status;
-}
-
-static void __exit mkiss_exit_driver(void)
-{
- tty_unregister_ldisc(&ax_ldisc);
-}
-
-MODULE_AUTHOR("Ralf Baechle DL5RB <ralf@linux-mips.org>");
-MODULE_DESCRIPTION("KISS driver for AX.25 over TTYs");
-module_param(crc_force, int, 0);
-MODULE_PARM_DESC(crc_force, "crc [0 = auto | 1 = none | 2 = flexnet | 3 = smack]");
-MODULE_LICENSE("GPL");
-MODULE_ALIAS_LDISC(N_AX25);
-
-module_init(mkiss_init_driver);
-module_exit(mkiss_exit_driver);
+++ /dev/null
-#define RCS_ID "$Id: scc.c,v 1.75 1998/11/04 15:15:01 jreuter Exp jreuter $"
-
-#define VERSION "3.0"
-
-/*
- * Please use z8530drv-utils-3.0 with this version.
- * ------------------
- *
- * You can find a subset of the documentation in
- * Documentation/networking/device_drivers/hamradio/z8530drv.rst.
- */
-
-/*
- ********************************************************************
- * SCC.C - Linux driver for Z8530 based HDLC cards for AX.25 *
- ********************************************************************
-
-
- ********************************************************************
-
- Copyright (c) 1993, 2000 Joerg Reuter DL1BKE
-
- portions (c) 1993 Guido ten Dolle PE1NNZ
-
- ********************************************************************
-
- The driver and the programs in the archive are UNDER CONSTRUCTION.
- The code is likely to fail, and so your kernel could --- even
- a whole network.
-
- This driver is intended for Amateur Radio use. If you are running it
- for commercial purposes, please drop me a note. I am nosy...
-
- ...BUT:
-
- ! You m u s t recognize the appropriate legislations of your country !
- ! before you connect a radio to the SCC board and start to transmit or !
- ! receive. The GPL allows you to use the d r i v e r, NOT the RADIO! !
-
- For non-Amateur-Radio use please note that you might need a special
- allowance/licence from the designer of the SCC Board and/or the
- MODEM.
-
- This program is free software; you can redistribute it and/or modify
- it under the terms of the (modified) GNU General Public License
- delivered with the Linux kernel source.
-
- This program is distributed in the hope that it will be useful,
- but WITHOUT ANY WARRANTY; without even the implied warranty of
- MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
- GNU General Public License for more details.
-
- You should find a copy of the GNU General Public License in
- /usr/src/linux/COPYING;
-
- ********************************************************************
-
-
- Incomplete history of z8530drv:
- -------------------------------
-
- 1994-09-13 started to write the driver, rescued most of my own
- code (and Hans Alblas' memory buffer pool concept) from
- an earlier project "sccdrv" which was initiated by
- Guido ten Dolle. Not much of the old driver survived,
- though. The first version I put my hands on was sccdrv1.3
- from August 1993. The memory buffer pool concept
- appeared in an unauthorized sccdrv version (1.5) from
- August 1994.
-
- 1995-01-31 changed copyright notice to GPL without limitations.
-
- .
- . <SNIP>
- .
-
- 1996-10-05 New semester, new driver...
-
- * KISS TNC emulator removed (TTY driver)
- * Source moved to drivers/net/
- * Includes Z8530 defines from drivers/net/z8530.h
- * Uses sk_buffer memory management
- * Reduced overhead of /proc/net/z8530drv output
- * Streamlined quite a lot things
- * Invents brand new bugs... ;-)
-
- The move to version number 3.0 reflects theses changes.
- You can use 'kissbridge' if you need a KISS TNC emulator.
-
- 1996-12-13 Fixed for Linux networking changes. (G4KLX)
- 1997-01-08 Fixed the remaining problems.
- 1997-04-02 Hopefully fixed the problems with the new *_timer()
- routines, added calibration code.
- 1997-10-12 Made SCC_DELAY a CONFIG option, added CONFIG_SCC_TRXECHO
- 1998-01-29 Small fix to avoid lock-up on initialization
- 1998-09-29 Fixed the "grouping" bugs, tx_inhibit works again,
- using dev->tx_queue_len now instead of MAXQUEUE now.
- 1998-10-21 Postponed the spinlock changes, would need a lot of
- testing I currently don't have the time to. Softdcd doesn't
- work.
- 1998-11-04 Softdcd does not work correctly in DPLL mode, in fact it
- never did. The DPLL locks on noise, the SYNC unit sees
- flags that aren't... Restarting the DPLL does not help
- either, it resynchronizes too slow and the first received
- frame gets lost.
- 2000-02-13 Fixed for new network driver interface changes, still
- does TX timeouts itself since it uses its own queue
- scheme.
-
- Thanks to all who contributed to this driver with ideas and bug
- reports!
-
- NB -- if you find errors, change something, please let me know
- first before you distribute it... And please don't touch
- the version number. Just replace my callsign in
- "v3.0.dl1bke" with your own. Just to avoid confusion...
-
- If you want to add your modification to the linux distribution
- please (!) contact me first.
-
- New versions of the driver will be announced on the linux-hams
- mailing list on vger.kernel.org. To subscribe send an e-mail
- to majordomo@vger.kernel.org with the following line in
- the body of the mail:
-
- subscribe linux-hams
-
- The content of the "Subject" field will be ignored.
-
- vy 73,
- Joerg Reuter ampr-net: dl1bke@db0pra.ampr.org
- AX-25 : DL1BKE @ DB0ABH.#BAY.DEU.EU
- Internet: jreuter@yaina.de
- www : http://yaina.de/jreuter
-*/
-
-/* ----------------------------------------------------------------------- */
-
-#undef SCC_LDELAY /* slow it even a bit more down */
-#undef SCC_DONT_CHECK /* don't look if the SCCs you specified are available */
-
-#define SCC_MAXCHIPS 4 /* number of max. supported chips */
-#define SCC_BUFSIZE 384 /* must not exceed 4096 */
-#undef SCC_DEBUG
-
-#define SCC_DEFAULT_CLOCK 4915200
- /* default pclock if nothing is specified */
-
-/* ----------------------------------------------------------------------- */
-
-#include <linux/compat.h>
-#include <linux/module.h>
-#include <linux/errno.h>
-#include <linux/signal.h>
-#include <linux/timer.h>
-#include <linux/interrupt.h>
-#include <linux/ioport.h>
-#include <linux/string.h>
-#include <linux/in.h>
-#include <linux/fcntl.h>
-#include <linux/ptrace.h>
-#include <linux/delay.h>
-#include <linux/skbuff.h>
-#include <linux/netdevice.h>
-#include <linux/rtnetlink.h>
-#include <linux/if_ether.h>
-#include <linux/if_arp.h>
-#include <linux/socket.h>
-#include <linux/init.h>
-#include <linux/scc.h>
-#include <linux/ctype.h>
-#include <linux/kernel.h>
-#include <linux/proc_fs.h>
-#include <linux/seq_file.h>
-#include <linux/bitops.h>
-
-#include <net/net_namespace.h>
-#include <net/ax25.h>
-
-#include <asm/irq.h>
-#include <asm/io.h>
-#include <linux/uaccess.h>
-
-#include "z8530.h"
-
-static const char banner[] __initconst = KERN_INFO \
- "AX.25: Z8530 SCC driver version "VERSION".dl1bke\n";
-
-static void t_dwait(struct timer_list *t);
-static void t_txdelay(struct timer_list *t);
-static void t_tail(struct timer_list *t);
-static void t_busy(struct timer_list *);
-static void t_maxkeyup(struct timer_list *);
-static void t_idle(struct timer_list *t);
-static void scc_tx_done(struct scc_channel *);
-static void scc_start_tx_timer(struct scc_channel *,
- void (*)(struct timer_list *), unsigned long);
-static void scc_start_maxkeyup(struct scc_channel *);
-static void scc_start_defer(struct scc_channel *);
-
-static void z8530_init(void);
-
-static void init_channel(struct scc_channel *scc);
-static void scc_key_trx (struct scc_channel *scc, char tx);
-static void scc_init_timer(struct scc_channel *scc);
-
-static int scc_net_alloc(const char *name, struct scc_channel *scc);
-static void scc_net_setup(struct net_device *dev);
-static int scc_net_open(struct net_device *dev);
-static int scc_net_close(struct net_device *dev);
-static void scc_net_rx(struct scc_channel *scc, struct sk_buff *skb);
-static netdev_tx_t scc_net_tx(struct sk_buff *skb,
- struct net_device *dev);
-static int scc_net_siocdevprivate(struct net_device *dev, struct ifreq *ifr,
- void __user *data, int cmd);
-static int scc_net_set_mac_address(struct net_device *dev, void *addr);
-static struct net_device_stats * scc_net_get_stats(struct net_device *dev);
-
-static unsigned char SCC_DriverName[] = "scc";
-
-static struct irqflags { unsigned char used : 1; } Ivec[NR_IRQS];
-
-static struct scc_channel SCC_Info[2 * SCC_MAXCHIPS]; /* information per channel */
-
-static struct scc_ctrl {
- io_port chan_A;
- io_port chan_B;
- int irq;
-} SCC_ctrl[SCC_MAXCHIPS+1];
-
-static unsigned char Driver_Initialized;
-static int Nchips;
-static io_port Vector_Latch;
-
-
-/* ******************************************************************** */
-/* * Port Access Functions * */
-/* ******************************************************************** */
-
-/* These provide interrupt save 2-step access to the Z8530 registers */
-
-static DEFINE_SPINLOCK(iolock); /* Guards paired accesses */
-
-static inline unsigned char InReg(io_port port, unsigned char reg)
-{
- unsigned long flags;
- unsigned char r;
-
- spin_lock_irqsave(&iolock, flags);
-#ifdef SCC_LDELAY
- Outb(port, reg);
- udelay(SCC_LDELAY);
- r=Inb(port);
- udelay(SCC_LDELAY);
-#else
- Outb(port, reg);
- r=Inb(port);
-#endif
- spin_unlock_irqrestore(&iolock, flags);
- return r;
-}
-
-static inline void OutReg(io_port port, unsigned char reg, unsigned char val)
-{
- unsigned long flags;
-
- spin_lock_irqsave(&iolock, flags);
-#ifdef SCC_LDELAY
- Outb(port, reg); udelay(SCC_LDELAY);
- Outb(port, val); udelay(SCC_LDELAY);
-#else
- Outb(port, reg);
- Outb(port, val);
-#endif
- spin_unlock_irqrestore(&iolock, flags);
-}
-
-static inline void wr(struct scc_channel *scc, unsigned char reg,
- unsigned char val)
-{
- OutReg(scc->ctrl, reg, (scc->wreg[reg] = val));
-}
-
-static inline void or(struct scc_channel *scc, unsigned char reg, unsigned char val)
-{
- OutReg(scc->ctrl, reg, (scc->wreg[reg] |= val));
-}
-
-static inline void cl(struct scc_channel *scc, unsigned char reg, unsigned char val)
-{
- OutReg(scc->ctrl, reg, (scc->wreg[reg] &= ~val));
-}
-
-/* ******************************************************************** */
-/* * Some useful macros * */
-/* ******************************************************************** */
-
-static inline void scc_discard_buffers(struct scc_channel *scc)
-{
- unsigned long flags;
-
- spin_lock_irqsave(&scc->lock, flags);
- if (scc->tx_buff != NULL)
- {
- dev_kfree_skb_irq(scc->tx_buff);
- scc->tx_buff = NULL;
- }
-
- while (!skb_queue_empty(&scc->tx_queue))
- dev_kfree_skb_irq(skb_dequeue(&scc->tx_queue));
-
- spin_unlock_irqrestore(&scc->lock, flags);
-}
-
-
-
-/* ******************************************************************** */
-/* * Interrupt Service Routines * */
-/* ******************************************************************** */
-
-
-/* ----> subroutines for the interrupt handlers <---- */
-
-static inline void scc_notify(struct scc_channel *scc, int event)
-{
- struct sk_buff *skb;
- char *bp;
-
- if (scc->kiss.fulldup != KISS_DUPLEX_OPTIMA)
- return;
-
- skb = dev_alloc_skb(2);
- if (skb != NULL)
- {
- bp = skb_put(skb, 2);
- *bp++ = PARAM_HWEVENT;
- *bp++ = event;
- scc_net_rx(scc, skb);
- } else
- scc->stat.nospace++;
-}
-
-static inline void flush_rx_FIFO(struct scc_channel *scc)
-{
- int k;
-
- for (k=0; k<3; k++)
- Inb(scc->data);
-
- if(scc->rx_buff != NULL) /* did we receive something? */
- {
- scc->stat.rxerrs++; /* then count it as an error */
- dev_kfree_skb_irq(scc->rx_buff);
- scc->rx_buff = NULL;
- }
-}
-
-static void start_hunt(struct scc_channel *scc)
-{
- if ((scc->modem.clocksrc != CLK_EXTERNAL))
- OutReg(scc->ctrl,R14,SEARCH|scc->wreg[R14]); /* DPLL: enter search mode */
- or(scc,R3,ENT_HM|RxENABLE); /* enable the receiver, hunt mode */
-}
-
-/* ----> four different interrupt handlers for Tx, Rx, changing of */
-/* DCD/CTS and Rx/Tx errors */
-
-/* Transmitter interrupt handler */
-static inline void scc_txint(struct scc_channel *scc)
-{
- struct sk_buff *skb;
-
- scc->stat.txints++;
- skb = scc->tx_buff;
-
- /* send first octet */
-
- if (skb == NULL)
- {
- skb = skb_dequeue(&scc->tx_queue);
- scc->tx_buff = skb;
- netif_wake_queue(scc->dev);
-
- if (skb == NULL)
- {
- scc_tx_done(scc);
- Outb(scc->ctrl, RES_Tx_P);
- return;
- }
-
- if (skb->len == 0) /* Paranoia... */
- {
- dev_kfree_skb_irq(skb);
- scc->tx_buff = NULL;
- scc_tx_done(scc);
- Outb(scc->ctrl, RES_Tx_P);
- return;
- }
-
- scc->stat.tx_state = TXS_ACTIVE;
-
- OutReg(scc->ctrl, R0, RES_Tx_CRC);
- /* reset CRC generator */
- or(scc,R10,ABUNDER); /* re-install underrun protection */
- Outb(scc->data,*skb->data); /* send byte */
- skb_pull(skb, 1);
-
- if (!scc->enhanced) /* reset EOM latch */
- Outb(scc->ctrl,RES_EOM_L);
- return;
- }
-
- /* End Of Frame... */
-
- if (skb->len == 0)
- {
- Outb(scc->ctrl, RES_Tx_P); /* reset pending int */
- cl(scc, R10, ABUNDER); /* send CRC */
- dev_kfree_skb_irq(skb);
- scc->tx_buff = NULL;
- scc->stat.tx_state = TXS_NEWFRAME; /* next frame... */
- return;
- }
-
- /* send octet */
-
- Outb(scc->data,*skb->data);
- skb_pull(skb, 1);
-}
-
-
-/* External/Status interrupt handler */
-static inline void scc_exint(struct scc_channel *scc)
-{
- unsigned char status,changes,chg_and_stat;
-
- scc->stat.exints++;
-
- status = InReg(scc->ctrl,R0);
- changes = status ^ scc->status;
- chg_and_stat = changes & status;
-
- /* ABORT: generated whenever DCD drops while receiving */
-
- if (chg_and_stat & BRK_ABRT) /* Received an ABORT */
- flush_rx_FIFO(scc);
-
- /* HUNT: software DCD; on = waiting for SYNC, off = receiving frame */
-
- if ((changes & SYNC_HUNT) && scc->kiss.softdcd)
- {
- if (status & SYNC_HUNT)
- {
- scc->dcd = 0;
- flush_rx_FIFO(scc);
- if ((scc->modem.clocksrc != CLK_EXTERNAL))
- OutReg(scc->ctrl,R14,SEARCH|scc->wreg[R14]); /* DPLL: enter search mode */
- } else {
- scc->dcd = 1;
- }
-
- scc_notify(scc, scc->dcd? HWEV_DCD_OFF:HWEV_DCD_ON);
- }
-
- /* DCD: on = start to receive packet, off = ABORT condition */
- /* (a successfully received packet generates a special condition int) */
-
- if((changes & DCD) && !scc->kiss.softdcd) /* DCD input changed state */
- {
- if(status & DCD) /* DCD is now ON */
- {
- start_hunt(scc);
- scc->dcd = 1;
- } else { /* DCD is now OFF */
- cl(scc,R3,ENT_HM|RxENABLE); /* disable the receiver */
- flush_rx_FIFO(scc);
- scc->dcd = 0;
- }
-
- scc_notify(scc, scc->dcd? HWEV_DCD_ON:HWEV_DCD_OFF);
- }
-
-#ifdef notdef
- /* CTS: use external TxDelay (what's that good for?!)
- * Anyway: If we _could_ use it (BayCom USCC uses CTS for
- * own purposes) we _should_ use the "autoenable" feature
- * of the Z8530 and not this interrupt...
- */
-
- if (chg_and_stat & CTS) /* CTS is now ON */
- {
- if (scc->kiss.txdelay == 0) /* zero TXDELAY = wait for CTS */
- scc_start_tx_timer(scc, t_txdelay, 0);
- }
-#endif
-
- if (scc->stat.tx_state == TXS_ACTIVE && (status & TxEOM))
- {
- scc->stat.tx_under++; /* oops, an underrun! count 'em */
- Outb(scc->ctrl, RES_EXT_INT); /* reset ext/status interrupts */
-
- if (scc->tx_buff != NULL)
- {
- dev_kfree_skb_irq(scc->tx_buff);
- scc->tx_buff = NULL;
- }
-
- or(scc,R10,ABUNDER);
- scc_start_tx_timer(scc, t_txdelay, 0); /* restart transmission */
- }
-
- scc->status = status;
- Outb(scc->ctrl,RES_EXT_INT);
-}
-
-
-/* Receiver interrupt handler */
-static inline void scc_rxint(struct scc_channel *scc)
-{
- struct sk_buff *skb;
-
- scc->stat.rxints++;
-
- if((scc->wreg[5] & RTS) && scc->kiss.fulldup == KISS_DUPLEX_HALF)
- {
- Inb(scc->data); /* discard char */
- or(scc,R3,ENT_HM); /* enter hunt mode for next flag */
- return;
- }
-
- skb = scc->rx_buff;
-
- if (skb == NULL)
- {
- skb = dev_alloc_skb(scc->stat.bufsize);
- if (skb == NULL)
- {
- scc->dev_stat.rx_dropped++;
- scc->stat.nospace++;
- Inb(scc->data);
- or(scc, R3, ENT_HM);
- return;
- }
-
- scc->rx_buff = skb;
- skb_put_u8(skb, 0); /* KISS data */
- }
-
- if (skb->len >= scc->stat.bufsize)
- {
-#ifdef notdef
- printk(KERN_DEBUG "z8530drv: oops, scc_rxint() received huge frame...\n");
-#endif
- dev_kfree_skb_irq(skb);
- scc->rx_buff = NULL;
- Inb(scc->data);
- or(scc, R3, ENT_HM);
- return;
- }
-
- skb_put_u8(skb, Inb(scc->data));
-}
-
-
-/* Receive Special Condition interrupt handler */
-static inline void scc_spint(struct scc_channel *scc)
-{
- unsigned char status;
- struct sk_buff *skb;
-
- scc->stat.spints++;
-
- status = InReg(scc->ctrl,R1); /* read receiver status */
-
- Inb(scc->data); /* throw away Rx byte */
- skb = scc->rx_buff;
-
- if(status & Rx_OVR) /* receiver overrun */
- {
- scc->stat.rx_over++; /* count them */
- or(scc,R3,ENT_HM); /* enter hunt mode for next flag */
-
- if (skb != NULL)
- dev_kfree_skb_irq(skb);
- scc->rx_buff = skb = NULL;
- }
-
- if(status & END_FR && skb != NULL) /* end of frame */
- {
- /* CRC okay, frame ends on 8 bit boundary and received something ? */
-
- if (!(status & CRC_ERR) && (status & 0xe) == RES8 && skb->len > 0)
- {
- /* ignore last received byte (first of the CRC bytes) */
- skb_trim(skb, skb->len-1);
- scc_net_rx(scc, skb);
- scc->rx_buff = NULL;
- scc->stat.rxframes++;
- } else { /* a bad frame */
- dev_kfree_skb_irq(skb);
- scc->rx_buff = NULL;
- scc->stat.rxerrs++;
- }
- }
-
- Outb(scc->ctrl,ERR_RES);
-}
-
-
-/* ----> interrupt service routine for the Z8530 <---- */
-
-static void scc_isr_dispatch(struct scc_channel *scc, int vector)
-{
- spin_lock(&scc->lock);
- switch (vector & VECTOR_MASK)
- {
- case TXINT: scc_txint(scc); break;
- case EXINT: scc_exint(scc); break;
- case RXINT: scc_rxint(scc); break;
- case SPINT: scc_spint(scc); break;
- }
- spin_unlock(&scc->lock);
-}
-
-/* If the card has a latch for the interrupt vector (like the PA0HZP card)
- use it to get the number of the chip that generated the int.
- If not: poll all defined chips.
- */
-
-#define SCC_IRQTIMEOUT 30000
-
-static irqreturn_t scc_isr(int irq, void *dev_id)
-{
- int chip_irq = (long) dev_id;
- unsigned char vector;
- struct scc_channel *scc;
- struct scc_ctrl *ctrl;
- int k;
-
- if (Vector_Latch)
- {
- for(k=0; k < SCC_IRQTIMEOUT; k++)
- {
- Outb(Vector_Latch, 0); /* Generate INTACK */
-
- /* Read the vector */
- if((vector=Inb(Vector_Latch)) >= 16 * Nchips) break;
- if (vector & 0x01) break;
-
- scc=&SCC_Info[vector >> 3 ^ 0x01];
- if (!scc->dev) break;
-
- scc_isr_dispatch(scc, vector);
-
- OutReg(scc->ctrl,R0,RES_H_IUS); /* Reset Highest IUS */
- }
-
- if (k == SCC_IRQTIMEOUT)
- printk(KERN_WARNING "z8530drv: endless loop in scc_isr()?\n");
-
- return IRQ_HANDLED;
- }
-
- /* Find the SCC generating the interrupt by polling all attached SCCs
- * reading RR3A (the interrupt pending register)
- */
-
- ctrl = SCC_ctrl;
- while (ctrl->chan_A)
- {
- if (ctrl->irq != chip_irq)
- {
- ctrl++;
- continue;
- }
-
- scc = NULL;
- for (k = 0; InReg(ctrl->chan_A,R3) && k < SCC_IRQTIMEOUT; k++)
- {
- vector=InReg(ctrl->chan_B,R2); /* Read the vector */
- if (vector & 0x01) break;
-
- scc = &SCC_Info[vector >> 3 ^ 0x01];
- if (!scc->dev) break;
-
- scc_isr_dispatch(scc, vector);
- }
-
- if (k == SCC_IRQTIMEOUT)
- {
- printk(KERN_WARNING "z8530drv: endless loop in scc_isr()?!\n");
- break;
- }
-
- /* This looks weird and it is. At least the BayCom USCC doesn't
- * use the Interrupt Daisy Chain, thus we'll have to start
- * all over again to be sure not to miss an interrupt from
- * (any of) the other chip(s)...
- * Honestly, the situation *is* braindamaged...
- */
-
- if (scc != NULL)
- {
- OutReg(scc->ctrl,R0,RES_H_IUS);
- ctrl = SCC_ctrl;
- } else
- ctrl++;
- }
- return IRQ_HANDLED;
-}
-
-
-
-/* ******************************************************************** */
-/* * Init Channel */
-/* ******************************************************************** */
-
-
-/* ----> set SCC channel speed <---- */
-
-static inline void set_brg(struct scc_channel *scc, unsigned int tc)
-{
- cl(scc,R14,BRENABL); /* disable baudrate generator */
- wr(scc,R12,tc & 255); /* brg rate LOW */
- wr(scc,R13,tc >> 8); /* brg rate HIGH */
- or(scc,R14,BRENABL); /* enable baudrate generator */
-}
-
-static inline void set_speed(struct scc_channel *scc)
-{
- unsigned long flags;
- spin_lock_irqsave(&scc->lock, flags);
-
- if (scc->modem.speed > 0) /* paranoia... */
- set_brg(scc, (unsigned) (scc->clock / (scc->modem.speed * 64)) - 2);
-
- spin_unlock_irqrestore(&scc->lock, flags);
-}
-
-
-/* ----> initialize a SCC channel <---- */
-
-static inline void init_brg(struct scc_channel *scc)
-{
- wr(scc, R14, BRSRC); /* BRG source = PCLK */
- OutReg(scc->ctrl, R14, SSBR|scc->wreg[R14]); /* DPLL source = BRG */
- OutReg(scc->ctrl, R14, SNRZI|scc->wreg[R14]); /* DPLL NRZI mode */
-}
-
-/*
- * Initialization according to the Z8530 manual (SGS-Thomson's version):
- *
- * 1. Modes and constants
- *
- * WR9 11000000 chip reset
- * WR4 XXXXXXXX Tx/Rx control, async or sync mode
- * WR1 0XX00X00 select W/REQ (optional)
- * WR2 XXXXXXXX program interrupt vector
- * WR3 XXXXXXX0 select Rx control
- * WR5 XXXX0XXX select Tx control
- * WR6 XXXXXXXX sync character
- * WR7 XXXXXXXX sync character
- * WR9 000X0XXX select interrupt control
- * WR10 XXXXXXXX miscellaneous control (optional)
- * WR11 XXXXXXXX clock control
- * WR12 XXXXXXXX time constant lower byte (optional)
- * WR13 XXXXXXXX time constant upper byte (optional)
- * WR14 XXXXXXX0 miscellaneous control
- * WR14 XXXSSSSS commands (optional)
- *
- * 2. Enables
- *
- * WR14 000SSSS1 baud rate enable
- * WR3 SSSSSSS1 Rx enable
- * WR5 SSSS1SSS Tx enable
- * WR0 10000000 reset Tx CRG (optional)
- * WR1 XSS00S00 DMA enable (optional)
- *
- * 3. Interrupt status
- *
- * WR15 XXXXXXXX enable external/status
- * WR0 00010000 reset external status
- * WR0 00010000 reset external status twice
- * WR1 SSSXXSXX enable Rx, Tx and Ext/status
- * WR9 000SXSSS enable master interrupt enable
- *
- * 1 = set to one, 0 = reset to zero
- * X = user defined, S = same as previous init
- *
- *
- * Note that the implementation differs in some points from above scheme.
- *
- */
-
-static void init_channel(struct scc_channel *scc)
-{
- timer_delete(&scc->tx_t);
- timer_delete(&scc->tx_wdog);
-
- disable_irq(scc->irq);
-
- wr(scc,R4,X1CLK|SDLC); /* *1 clock, SDLC mode */
- wr(scc,R1,0); /* no W/REQ operation */
- wr(scc,R3,Rx8|RxCRC_ENAB); /* RX 8 bits/char, CRC, disabled */
- wr(scc,R5,Tx8|DTR|TxCRC_ENAB); /* TX 8 bits/char, disabled, DTR */
- wr(scc,R6,0); /* SDLC address zero (not used) */
- wr(scc,R7,FLAG); /* SDLC flag value */
- wr(scc,R9,VIS); /* vector includes status */
- wr(scc,R10,(scc->modem.nrz? NRZ : NRZI)|CRCPS|ABUNDER); /* abort on underrun, preset CRC generator, NRZ(I) */
- wr(scc,R14, 0);
-
-
-/* set clock sources:
-
- CLK_DPLL: normal halfduplex operation
-
- RxClk: use DPLL
- TxClk: use DPLL
- TRxC mode DPLL output
-
- CLK_EXTERNAL: external clocking (G3RUH or DF9IC modem)
-
- BayCom: others:
-
- TxClk = pin RTxC TxClk = pin TRxC
- RxClk = pin TRxC RxClk = pin RTxC
-
-
- CLK_DIVIDER:
- RxClk = use DPLL
- TxClk = pin RTxC
-
- BayCom: others:
- pin TRxC = DPLL pin TRxC = BRG
- (RxClk * 1) (RxClk * 32)
-*/
-
-
- switch(scc->modem.clocksrc)
- {
- case CLK_DPLL:
- wr(scc, R11, RCDPLL|TCDPLL|TRxCOI|TRxCDP);
- init_brg(scc);
- break;
-
- case CLK_DIVIDER:
- wr(scc, R11, ((scc->brand & BAYCOM)? TRxCDP : TRxCBR) | RCDPLL|TCRTxCP|TRxCOI);
- init_brg(scc);
- break;
-
- case CLK_EXTERNAL:
- wr(scc, R11, (scc->brand & BAYCOM)? RCTRxCP|TCRTxCP : RCRTxCP|TCTRxCP);
- OutReg(scc->ctrl, R14, DISDPLL);
- break;
-
- }
-
- set_speed(scc); /* set baudrate */
-
- if(scc->enhanced)
- {
- or(scc,R15,SHDLCE|FIFOE); /* enable FIFO, SDLC/HDLC Enhancements (From now R7 is R7') */
- wr(scc,R7,AUTOEOM);
- }
-
- if(scc->kiss.softdcd || (InReg(scc->ctrl,R0) & DCD))
- /* DCD is now ON */
- {
- start_hunt(scc);
- }
-
- /* enable ABORT, DCD & SYNC/HUNT interrupts */
-
- wr(scc,R15, BRKIE|TxUIE|(scc->kiss.softdcd? SYNCIE:DCDIE));
-
- Outb(scc->ctrl,RES_EXT_INT); /* reset ext/status interrupts */
- Outb(scc->ctrl,RES_EXT_INT); /* must be done twice */
-
- or(scc,R1,INT_ALL_Rx|TxINT_ENAB|EXT_INT_ENAB); /* enable interrupts */
-
- scc->status = InReg(scc->ctrl,R0); /* read initial status */
-
- or(scc,R9,MIE); /* master interrupt enable */
-
- scc_init_timer(scc);
-
- enable_irq(scc->irq);
-}
-
-
-
-
-/* ******************************************************************** */
-/* * SCC timer functions * */
-/* ******************************************************************** */
-
-
-/* ----> scc_key_trx sets the time constant for the baudrate
- generator and keys the transmitter <---- */
-
-static void scc_key_trx(struct scc_channel *scc, char tx)
-{
- unsigned int time_const;
-
- if (scc->brand & PRIMUS)
- Outb(scc->ctrl + 4, scc->option | (tx? 0x80 : 0));
-
- if (scc->modem.speed < 300)
- scc->modem.speed = 1200;
-
- time_const = (unsigned) (scc->clock / (scc->modem.speed * (tx? 2:64))) - 2;
-
- disable_irq(scc->irq);
-
- if (tx)
- {
- or(scc, R1, TxINT_ENAB); /* t_maxkeyup may have reset these */
- or(scc, R15, TxUIE);
- }
-
- if (scc->modem.clocksrc == CLK_DPLL)
- { /* force simplex operation */
- if (tx)
- {
-#ifdef CONFIG_SCC_TRXECHO
- cl(scc, R3, RxENABLE|ENT_HM); /* switch off receiver */
- cl(scc, R15, DCDIE|SYNCIE); /* No DCD changes, please */
-#endif
- set_brg(scc, time_const); /* reprogram baudrate generator */
-
- /* DPLL -> Rx clk, BRG -> Tx CLK, TRxC mode output, TRxC = BRG */
- wr(scc, R11, RCDPLL|TCBR|TRxCOI|TRxCBR);
-
- /* By popular demand: tx_inhibit */
- if (scc->kiss.tx_inhibit)
- {
- or(scc,R5, TxENAB);
- scc->wreg[R5] |= RTS;
- } else {
- or(scc,R5,RTS|TxENAB); /* set the RTS line and enable TX */
- }
- } else {
- cl(scc,R5,RTS|TxENAB);
-
- set_brg(scc, time_const); /* reprogram baudrate generator */
-
- /* DPLL -> Rx clk, DPLL -> Tx CLK, TRxC mode output, TRxC = DPLL */
- wr(scc, R11, RCDPLL|TCDPLL|TRxCOI|TRxCDP);
-
-#ifndef CONFIG_SCC_TRXECHO
- if (scc->kiss.softdcd)
-#endif
- {
- or(scc,R15, scc->kiss.softdcd? SYNCIE:DCDIE);
- start_hunt(scc);
- }
- }
- } else {
- if (tx)
- {
-#ifdef CONFIG_SCC_TRXECHO
- if (scc->kiss.fulldup == KISS_DUPLEX_HALF)
- {
- cl(scc, R3, RxENABLE);
- cl(scc, R15, DCDIE|SYNCIE);
- }
-#endif
-
- if (scc->kiss.tx_inhibit)
- {
- or(scc,R5, TxENAB);
- scc->wreg[R5] |= RTS;
- } else {
- or(scc,R5,RTS|TxENAB); /* enable tx */
- }
- } else {
- cl(scc,R5,RTS|TxENAB); /* disable tx */
-
- if ((scc->kiss.fulldup == KISS_DUPLEX_HALF) &&
-#ifndef CONFIG_SCC_TRXECHO
- scc->kiss.softdcd)
-#else
- 1)
-#endif
- {
- or(scc, R15, scc->kiss.softdcd? SYNCIE:DCDIE);
- start_hunt(scc);
- }
- }
- }
-
- enable_irq(scc->irq);
-}
-
-
-/* ----> SCC timer interrupt handler and friends. <---- */
-
-static void __scc_start_tx_timer(struct scc_channel *scc,
- void (*handler)(struct timer_list *t),
- unsigned long when)
-{
- timer_delete(&scc->tx_t);
-
- if (when == 0)
- {
- handler(&scc->tx_t);
- } else
- if (when != TIMER_OFF)
- {
- scc->tx_t.function = handler;
- scc->tx_t.expires = jiffies + (when*HZ)/100;
- add_timer(&scc->tx_t);
- }
-}
-
-static void scc_start_tx_timer(struct scc_channel *scc,
- void (*handler)(struct timer_list *t),
- unsigned long when)
-{
- unsigned long flags;
-
- spin_lock_irqsave(&scc->lock, flags);
- __scc_start_tx_timer(scc, handler, when);
- spin_unlock_irqrestore(&scc->lock, flags);
-}
-
-static void scc_start_defer(struct scc_channel *scc)
-{
- unsigned long flags;
-
- spin_lock_irqsave(&scc->lock, flags);
- timer_delete(&scc->tx_wdog);
-
- if (scc->kiss.maxdefer != 0 && scc->kiss.maxdefer != TIMER_OFF)
- {
- scc->tx_wdog.function = t_busy;
- scc->tx_wdog.expires = jiffies + HZ*scc->kiss.maxdefer;
- add_timer(&scc->tx_wdog);
- }
- spin_unlock_irqrestore(&scc->lock, flags);
-}
-
-static void scc_start_maxkeyup(struct scc_channel *scc)
-{
- unsigned long flags;
-
- spin_lock_irqsave(&scc->lock, flags);
- timer_delete(&scc->tx_wdog);
-
- if (scc->kiss.maxkeyup != 0 && scc->kiss.maxkeyup != TIMER_OFF)
- {
- scc->tx_wdog.function = t_maxkeyup;
- scc->tx_wdog.expires = jiffies + HZ*scc->kiss.maxkeyup;
- add_timer(&scc->tx_wdog);
- }
- spin_unlock_irqrestore(&scc->lock, flags);
-}
-
-/*
- * This is called from scc_txint() when there are no more frames to send.
- * Not exactly a timer function, but it is a close friend of the family...
- */
-
-static void scc_tx_done(struct scc_channel *scc)
-{
- /*
- * trx remains keyed in fulldup mode 2 until t_idle expires.
- */
-
- switch (scc->kiss.fulldup)
- {
- case KISS_DUPLEX_LINK:
- scc->stat.tx_state = TXS_IDLE2;
- if (scc->kiss.idletime != TIMER_OFF)
- scc_start_tx_timer(scc, t_idle,
- scc->kiss.idletime*100);
- break;
- case KISS_DUPLEX_OPTIMA:
- scc_notify(scc, HWEV_ALL_SENT);
- break;
- default:
- scc->stat.tx_state = TXS_BUSY;
- scc_start_tx_timer(scc, t_tail, scc->kiss.tailtime);
- }
-
- netif_wake_queue(scc->dev);
-}
-
-
-static unsigned char Rand = 17;
-
-static inline int is_grouped(struct scc_channel *scc)
-{
- int k;
- struct scc_channel *scc2;
- unsigned char grp1, grp2;
-
- grp1 = scc->kiss.group;
-
- for (k = 0; k < (Nchips * 2); k++)
- {
- scc2 = &SCC_Info[k];
- grp2 = scc2->kiss.group;
-
- if (scc2 == scc || !(scc2->dev && grp2))
- continue;
-
- if ((grp1 & 0x3f) == (grp2 & 0x3f))
- {
- if ( (grp1 & TXGROUP) && (scc2->wreg[R5] & RTS) )
- return 1;
-
- if ( (grp1 & RXGROUP) && scc2->dcd )
- return 1;
- }
- }
- return 0;
-}
-
-/* DWAIT and SLOTTIME expired
- *
- * fulldup == 0: DCD is active or Rand > P-persistence: start t_busy timer
- * else key trx and start txdelay
- * fulldup == 1: key trx and start txdelay
- * fulldup == 2: mintime expired, reset status or key trx and start txdelay
- */
-
-static void t_dwait(struct timer_list *t)
-{
- struct scc_channel *scc = timer_container_of(scc, t, tx_t);
-
- if (scc->stat.tx_state == TXS_WAIT) /* maxkeyup or idle timeout */
- {
- if (skb_queue_empty(&scc->tx_queue)) { /* nothing to send */
- scc->stat.tx_state = TXS_IDLE;
- netif_wake_queue(scc->dev); /* t_maxkeyup locked it. */
- return;
- }
-
- scc->stat.tx_state = TXS_BUSY;
- }
-
- if (scc->kiss.fulldup == KISS_DUPLEX_HALF)
- {
- Rand = Rand * 17 + 31;
-
- if (scc->dcd || (scc->kiss.persist) < Rand || (scc->kiss.group && is_grouped(scc)) )
- {
- scc_start_defer(scc);
- scc_start_tx_timer(scc, t_dwait, scc->kiss.slottime);
- return ;
- }
- }
-
- if ( !(scc->wreg[R5] & RTS) )
- {
- scc_key_trx(scc, TX_ON);
- scc_start_tx_timer(scc, t_txdelay, scc->kiss.txdelay);
- } else {
- scc_start_tx_timer(scc, t_txdelay, 0);
- }
-}
-
-
-/* TXDELAY expired
- *
- * kick transmission by a fake scc_txint(scc), start 'maxkeyup' watchdog.
- */
-
-static void t_txdelay(struct timer_list *t)
-{
- struct scc_channel *scc = timer_container_of(scc, t, tx_t);
-
- scc_start_maxkeyup(scc);
-
- if (scc->tx_buff == NULL)
- {
- disable_irq(scc->irq);
- scc_txint(scc);
- enable_irq(scc->irq);
- }
-}
-
-
-/* TAILTIME expired
- *
- * switch off transmitter. If we were stopped by Maxkeyup restart
- * transmission after 'mintime' seconds
- */
-
-static void t_tail(struct timer_list *t)
-{
- struct scc_channel *scc = timer_container_of(scc, t, tx_t);
- unsigned long flags;
-
- spin_lock_irqsave(&scc->lock, flags);
- timer_delete(&scc->tx_wdog);
- scc_key_trx(scc, TX_OFF);
- spin_unlock_irqrestore(&scc->lock, flags);
-
- if (scc->stat.tx_state == TXS_TIMEOUT) /* we had a timeout? */
- {
- scc->stat.tx_state = TXS_WAIT;
- scc_start_tx_timer(scc, t_dwait, scc->kiss.mintime*100);
- return;
- }
-
- scc->stat.tx_state = TXS_IDLE;
- netif_wake_queue(scc->dev);
-}
-
-
-/* BUSY timeout
- *
- * throw away send buffers if DCD remains active too long.
- */
-
-static void t_busy(struct timer_list *t)
-{
- struct scc_channel *scc = timer_container_of(scc, t, tx_wdog);
-
- timer_delete(&scc->tx_t);
- netif_stop_queue(scc->dev); /* don't pile on the wabbit! */
-
- scc_discard_buffers(scc);
- scc->stat.txerrs++;
- scc->stat.tx_state = TXS_IDLE;
-
- netif_wake_queue(scc->dev);
-}
-
-/* MAXKEYUP timeout
- *
- * this is our watchdog.
- */
-
-static void t_maxkeyup(struct timer_list *t)
-{
- struct scc_channel *scc = timer_container_of(scc, t, tx_wdog);
- unsigned long flags;
-
- spin_lock_irqsave(&scc->lock, flags);
- /*
- * let things settle down before we start to
- * accept new data.
- */
-
- netif_stop_queue(scc->dev);
- scc_discard_buffers(scc);
-
- timer_delete(&scc->tx_t);
-
- cl(scc, R1, TxINT_ENAB); /* force an ABORT, but don't */
- cl(scc, R15, TxUIE); /* count it. */
- OutReg(scc->ctrl, R0, RES_Tx_P);
-
- spin_unlock_irqrestore(&scc->lock, flags);
-
- scc->stat.txerrs++;
- scc->stat.tx_state = TXS_TIMEOUT;
- scc_start_tx_timer(scc, t_tail, scc->kiss.tailtime);
-}
-
-/* IDLE timeout
- *
- * in fulldup mode 2 it keys down the transmitter after 'idle' seconds
- * of inactivity. We will not restart transmission before 'mintime'
- * expires.
- */
-
-static void t_idle(struct timer_list *t)
-{
- struct scc_channel *scc = timer_container_of(scc, t, tx_t);
-
- timer_delete(&scc->tx_wdog);
-
- scc_key_trx(scc, TX_OFF);
- if(scc->kiss.mintime)
- scc_start_tx_timer(scc, t_dwait, scc->kiss.mintime*100);
- scc->stat.tx_state = TXS_WAIT;
-}
-
-static void scc_init_timer(struct scc_channel *scc)
-{
- unsigned long flags;
-
- spin_lock_irqsave(&scc->lock, flags);
- scc->stat.tx_state = TXS_IDLE;
- spin_unlock_irqrestore(&scc->lock, flags);
-}
-
-
-/* ******************************************************************** */
-/* * Set/get L1 parameters * */
-/* ******************************************************************** */
-
-
-/*
- * this will set the "hardware" parameters through KISS commands or ioctl()
- */
-
-#define CAST(x) (unsigned long)(x)
-
-static unsigned int scc_set_param(struct scc_channel *scc, unsigned int cmd, unsigned int arg)
-{
- switch (cmd)
- {
- case PARAM_TXDELAY: scc->kiss.txdelay=arg; break;
- case PARAM_PERSIST: scc->kiss.persist=arg; break;
- case PARAM_SLOTTIME: scc->kiss.slottime=arg; break;
- case PARAM_TXTAIL: scc->kiss.tailtime=arg; break;
- case PARAM_FULLDUP: scc->kiss.fulldup=arg; break;
- case PARAM_DTR: break; /* does someone need this? */
- case PARAM_GROUP: scc->kiss.group=arg; break;
- case PARAM_IDLE: scc->kiss.idletime=arg; break;
- case PARAM_MIN: scc->kiss.mintime=arg; break;
- case PARAM_MAXKEY: scc->kiss.maxkeyup=arg; break;
- case PARAM_WAIT: scc->kiss.waittime=arg; break;
- case PARAM_MAXDEFER: scc->kiss.maxdefer=arg; break;
- case PARAM_TX: scc->kiss.tx_inhibit=arg; break;
-
- case PARAM_SOFTDCD:
- scc->kiss.softdcd=arg;
- if (arg)
- {
- or(scc, R15, SYNCIE);
- cl(scc, R15, DCDIE);
- start_hunt(scc);
- } else {
- or(scc, R15, DCDIE);
- cl(scc, R15, SYNCIE);
- }
- break;
-
- case PARAM_SPEED:
- if (arg < 256)
- scc->modem.speed=arg*100;
- else
- scc->modem.speed=arg;
-
- if (scc->stat.tx_state == 0) /* only switch baudrate on rx... ;-) */
- set_speed(scc);
- break;
-
- case PARAM_RTS:
- if ( !(scc->wreg[R5] & RTS) )
- {
- if (arg != TX_OFF) {
- scc_key_trx(scc, TX_ON);
- scc_start_tx_timer(scc, t_txdelay, scc->kiss.txdelay);
- }
- } else {
- if (arg == TX_OFF)
- {
- scc->stat.tx_state = TXS_BUSY;
- scc_start_tx_timer(scc, t_tail, scc->kiss.tailtime);
- }
- }
- break;
-
- case PARAM_HWEVENT:
- scc_notify(scc, scc->dcd? HWEV_DCD_ON:HWEV_DCD_OFF);
- break;
-
- default: return -EINVAL;
- }
-
- return 0;
-}
-
-
-
-static unsigned long scc_get_param(struct scc_channel *scc, unsigned int cmd)
-{
- switch (cmd)
- {
- case PARAM_TXDELAY: return CAST(scc->kiss.txdelay);
- case PARAM_PERSIST: return CAST(scc->kiss.persist);
- case PARAM_SLOTTIME: return CAST(scc->kiss.slottime);
- case PARAM_TXTAIL: return CAST(scc->kiss.tailtime);
- case PARAM_FULLDUP: return CAST(scc->kiss.fulldup);
- case PARAM_SOFTDCD: return CAST(scc->kiss.softdcd);
- case PARAM_DTR: return CAST((scc->wreg[R5] & DTR)? 1:0);
- case PARAM_RTS: return CAST((scc->wreg[R5] & RTS)? 1:0);
- case PARAM_SPEED: return CAST(scc->modem.speed);
- case PARAM_GROUP: return CAST(scc->kiss.group);
- case PARAM_IDLE: return CAST(scc->kiss.idletime);
- case PARAM_MIN: return CAST(scc->kiss.mintime);
- case PARAM_MAXKEY: return CAST(scc->kiss.maxkeyup);
- case PARAM_WAIT: return CAST(scc->kiss.waittime);
- case PARAM_MAXDEFER: return CAST(scc->kiss.maxdefer);
- case PARAM_TX: return CAST(scc->kiss.tx_inhibit);
- default: return NO_SUCH_PARAM;
- }
-
-}
-
-#undef CAST
-
-/* ******************************************************************* */
-/* * Send calibration pattern * */
-/* ******************************************************************* */
-
-static void scc_stop_calibrate(struct timer_list *t)
-{
- struct scc_channel *scc = timer_container_of(scc, t, tx_wdog);
- unsigned long flags;
-
- spin_lock_irqsave(&scc->lock, flags);
- timer_delete(&scc->tx_wdog);
- scc_key_trx(scc, TX_OFF);
- wr(scc, R6, 0);
- wr(scc, R7, FLAG);
- Outb(scc->ctrl,RES_EXT_INT); /* reset ext/status interrupts */
- Outb(scc->ctrl,RES_EXT_INT);
-
- netif_wake_queue(scc->dev);
- spin_unlock_irqrestore(&scc->lock, flags);
-}
-
-
-static void
-scc_start_calibrate(struct scc_channel *scc, int duration, unsigned char pattern)
-{
- unsigned long flags;
-
- spin_lock_irqsave(&scc->lock, flags);
- netif_stop_queue(scc->dev);
- scc_discard_buffers(scc);
-
- timer_delete(&scc->tx_wdog);
-
- scc->tx_wdog.function = scc_stop_calibrate;
- scc->tx_wdog.expires = jiffies + HZ*duration;
- add_timer(&scc->tx_wdog);
-
- /* This doesn't seem to work. Why not? */
- wr(scc, R6, 0);
- wr(scc, R7, pattern);
-
- /*
- * Don't know if this works.
- * Damn, where is my Z8530 programming manual...?
- */
-
- Outb(scc->ctrl,RES_EXT_INT); /* reset ext/status interrupts */
- Outb(scc->ctrl,RES_EXT_INT);
-
- scc_key_trx(scc, TX_ON);
- spin_unlock_irqrestore(&scc->lock, flags);
-}
-
-/* ******************************************************************* */
-/* * Init channel structures, special HW, etc... * */
-/* ******************************************************************* */
-
-/*
- * Reset the Z8530s and setup special hardware
- */
-
-static void z8530_init(void)
-{
- const unsigned int nr_irqs = irq_get_nr_irqs();
- struct scc_channel *scc;
- int chip, k;
- unsigned long flags;
- char *flag;
-
-
- printk(KERN_INFO "Init Z8530 driver: %u channels, IRQ", Nchips*2);
-
- flag=" ";
- for (k = 0; k < nr_irqs; k++)
- if (Ivec[k].used)
- {
- printk("%s%d", flag, k);
- flag=",";
- }
- printk("\n");
-
-
- /* reset and pre-init all chips in the system */
- for (chip = 0; chip < Nchips; chip++)
- {
- scc=&SCC_Info[2*chip];
- if (!scc->ctrl) continue;
-
- /* Special SCC cards */
-
- if(scc->brand & EAGLE) /* this is an EAGLE card */
- Outb(scc->special,0x08); /* enable interrupt on the board */
-
- if(scc->brand & (PC100 | PRIMUS)) /* this is a PC100/PRIMUS card */
- Outb(scc->special,scc->option); /* set the MODEM mode (0x22) */
-
-
- /* Reset and pre-init Z8530 */
-
- spin_lock_irqsave(&scc->lock, flags);
-
- Outb(scc->ctrl, 0);
- OutReg(scc->ctrl,R9,FHWRES); /* force hardware reset */
- udelay(100); /* give it 'a bit' more time than required */
- wr(scc, R2, chip*16); /* interrupt vector */
- wr(scc, R9, VIS); /* vector includes status */
- spin_unlock_irqrestore(&scc->lock, flags);
- }
-
-
- Driver_Initialized = 1;
-}
-
-/*
- * Allocate device structure, err, instance, and register driver
- */
-
-static int scc_net_alloc(const char *name, struct scc_channel *scc)
-{
- int err;
- struct net_device *dev;
-
- dev = alloc_netdev(0, name, NET_NAME_UNKNOWN, scc_net_setup);
- if (!dev)
- return -ENOMEM;
-
- dev->ml_priv = scc;
- scc->dev = dev;
- spin_lock_init(&scc->lock);
- timer_setup(&scc->tx_t, NULL, 0);
- timer_setup(&scc->tx_wdog, NULL, 0);
-
- err = register_netdevice(dev);
- if (err) {
- printk(KERN_ERR "%s: can't register network device (%d)\n",
- name, err);
- free_netdev(dev);
- scc->dev = NULL;
- return err;
- }
-
- return 0;
-}
-
-
-
-/* ******************************************************************** */
-/* * Network driver methods * */
-/* ******************************************************************** */
-
-static const struct net_device_ops scc_netdev_ops = {
- .ndo_open = scc_net_open,
- .ndo_stop = scc_net_close,
- .ndo_start_xmit = scc_net_tx,
- .ndo_set_mac_address = scc_net_set_mac_address,
- .ndo_get_stats = scc_net_get_stats,
- .ndo_siocdevprivate = scc_net_siocdevprivate,
-};
-
-/* ----> Initialize device <----- */
-
-static void scc_net_setup(struct net_device *dev)
-{
- dev->tx_queue_len = 16; /* should be enough... */
-
- dev->netdev_ops = &scc_netdev_ops;
- dev->header_ops = &ax25_header_ops;
-
- dev->flags = 0;
-
- dev->type = ARPHRD_AX25;
- dev->hard_header_len = AX25_MAX_HEADER_LEN + AX25_BPQ_HEADER_LEN;
- dev->mtu = AX25_DEF_PACLEN;
- dev->addr_len = AX25_ADDR_LEN;
-
- memcpy(dev->broadcast, &ax25_bcast, AX25_ADDR_LEN);
- dev_addr_set(dev, (u8 *)&ax25_defaddr);
-}
-
-/* ----> open network device <---- */
-
-static int scc_net_open(struct net_device *dev)
-{
- struct scc_channel *scc = (struct scc_channel *) dev->ml_priv;
-
- if (!scc->init)
- return -EINVAL;
-
- scc->tx_buff = NULL;
- skb_queue_head_init(&scc->tx_queue);
-
- init_channel(scc);
-
- netif_start_queue(dev);
- return 0;
-}
-
-/* ----> close network device <---- */
-
-static int scc_net_close(struct net_device *dev)
-{
- struct scc_channel *scc = (struct scc_channel *) dev->ml_priv;
- unsigned long flags;
-
- netif_stop_queue(dev);
-
- spin_lock_irqsave(&scc->lock, flags);
- Outb(scc->ctrl,0); /* Make sure pointer is written */
- wr(scc,R1,0); /* disable interrupts */
- wr(scc,R3,0);
- spin_unlock_irqrestore(&scc->lock, flags);
-
- timer_delete_sync(&scc->tx_t);
- timer_delete_sync(&scc->tx_wdog);
-
- scc_discard_buffers(scc);
-
- return 0;
-}
-
-/* ----> receive frame, called from scc_rxint() <---- */
-
-static void scc_net_rx(struct scc_channel *scc, struct sk_buff *skb)
-{
- if (skb->len == 0) {
- dev_kfree_skb_irq(skb);
- return;
- }
-
- scc->dev_stat.rx_packets++;
- scc->dev_stat.rx_bytes += skb->len;
-
- skb->protocol = ax25_type_trans(skb, scc->dev);
-
- netif_rx(skb);
-}
-
-/* ----> transmit frame <---- */
-
-static netdev_tx_t scc_net_tx(struct sk_buff *skb, struct net_device *dev)
-{
- struct scc_channel *scc = (struct scc_channel *) dev->ml_priv;
- unsigned long flags;
- char kisscmd;
-
- if (skb->protocol == htons(ETH_P_IP))
- return ax25_ip_xmit(skb);
-
- if (skb->len > scc->stat.bufsize || skb->len < 2) {
- scc->dev_stat.tx_dropped++; /* bogus frame */
- dev_kfree_skb(skb);
- return NETDEV_TX_OK;
- }
-
- scc->dev_stat.tx_packets++;
- scc->dev_stat.tx_bytes += skb->len;
- scc->stat.txframes++;
-
- kisscmd = *skb->data & 0x1f;
- skb_pull(skb, 1);
-
- if (kisscmd) {
- scc_set_param(scc, kisscmd, *skb->data);
- dev_kfree_skb(skb);
- return NETDEV_TX_OK;
- }
-
- spin_lock_irqsave(&scc->lock, flags);
-
- if (skb_queue_len(&scc->tx_queue) > scc->dev->tx_queue_len) {
- struct sk_buff *skb_del;
- skb_del = skb_dequeue(&scc->tx_queue);
- dev_kfree_skb_irq(skb_del);
- }
- skb_queue_tail(&scc->tx_queue, skb);
- netif_trans_update(dev);
-
-
- /*
- * Start transmission if the trx state is idle or
- * t_idle hasn't expired yet. Use dwait/persistence/slottime
- * algorithm for normal halfduplex operation.
- */
-
- if(scc->stat.tx_state == TXS_IDLE || scc->stat.tx_state == TXS_IDLE2) {
- scc->stat.tx_state = TXS_BUSY;
- if (scc->kiss.fulldup == KISS_DUPLEX_HALF)
- __scc_start_tx_timer(scc, t_dwait, scc->kiss.waittime);
- else
- __scc_start_tx_timer(scc, t_dwait, 0);
- }
- spin_unlock_irqrestore(&scc->lock, flags);
- return NETDEV_TX_OK;
-}
-
-/* ----> ioctl functions <---- */
-
-/*
- * SIOCSCCCFG - configure driver arg: (struct scc_hw_config *) arg
- * SIOCSCCINI - initialize driver arg: ---
- * SIOCSCCCHANINI - initialize channel arg: (struct scc_modem *) arg
- * SIOCSCCSMEM - set memory arg: (struct scc_mem_config *) arg
- * SIOCSCCGKISS - get level 1 parameter arg: (struct scc_kiss_cmd *) arg
- * SIOCSCCSKISS - set level 1 parameter arg: (struct scc_kiss_cmd *) arg
- * SIOCSCCGSTAT - get driver status arg: (struct scc_stat *) arg
- * SIOCSCCCAL - send calib. pattern arg: (struct scc_calibrate *) arg
- */
-
-static int scc_net_siocdevprivate(struct net_device *dev,
- struct ifreq *ifr, void __user *arg, int cmd)
-{
- struct scc_kiss_cmd kiss_cmd;
- struct scc_mem_config memcfg;
- struct scc_hw_config hwcfg;
- struct scc_calibrate cal;
- struct scc_channel *scc = (struct scc_channel *) dev->ml_priv;
- int chan;
- unsigned char device_name[IFNAMSIZ];
-
- if (!Driver_Initialized)
- {
- if (cmd == SIOCSCCCFG)
- {
- int found = 1;
-
- if (!capable(CAP_SYS_RAWIO)) return -EPERM;
- if (in_compat_syscall())
- return -EOPNOTSUPP;
-
- if (!arg) return -EFAULT;
-
- if (Nchips >= SCC_MAXCHIPS)
- return -EINVAL;
-
- if (copy_from_user(&hwcfg, arg, sizeof(hwcfg)))
- return -EFAULT;
-
- if (hwcfg.irq == 2) hwcfg.irq = 9;
-
- if (hwcfg.irq < 0 || hwcfg.irq >= irq_get_nr_irqs())
- return -EINVAL;
-
- if (!Ivec[hwcfg.irq].used && hwcfg.irq)
- {
- if (request_irq(hwcfg.irq, scc_isr,
- 0, "AX.25 SCC",
- (void *)(long) hwcfg.irq))
- printk(KERN_WARNING "z8530drv: warning, cannot get IRQ %d\n", hwcfg.irq);
- else
- Ivec[hwcfg.irq].used = 1;
- }
-
- if (hwcfg.vector_latch && !Vector_Latch) {
- if (!request_region(hwcfg.vector_latch, 1, "scc vector latch"))
- printk(KERN_WARNING "z8530drv: warning, cannot reserve vector latch port 0x%lx\n, disabled.", hwcfg.vector_latch);
- else
- Vector_Latch = hwcfg.vector_latch;
- }
-
- if (hwcfg.clock == 0)
- hwcfg.clock = SCC_DEFAULT_CLOCK;
-
-#ifndef SCC_DONT_CHECK
-
- if(request_region(hwcfg.ctrl_a, 1, "scc-probe"))
- {
- disable_irq(hwcfg.irq);
- Outb(hwcfg.ctrl_a, 0);
- OutReg(hwcfg.ctrl_a, R9, FHWRES);
- udelay(100);
- OutReg(hwcfg.ctrl_a,R13,0x55); /* is this chip really there? */
- udelay(5);
-
- if (InReg(hwcfg.ctrl_a,R13) != 0x55)
- found = 0;
- enable_irq(hwcfg.irq);
- release_region(hwcfg.ctrl_a, 1);
- }
- else
- found = 0;
-#endif
-
- if (found)
- {
- SCC_Info[2*Nchips ].ctrl = hwcfg.ctrl_a;
- SCC_Info[2*Nchips ].data = hwcfg.data_a;
- SCC_Info[2*Nchips ].irq = hwcfg.irq;
- SCC_Info[2*Nchips+1].ctrl = hwcfg.ctrl_b;
- SCC_Info[2*Nchips+1].data = hwcfg.data_b;
- SCC_Info[2*Nchips+1].irq = hwcfg.irq;
-
- SCC_ctrl[Nchips].chan_A = hwcfg.ctrl_a;
- SCC_ctrl[Nchips].chan_B = hwcfg.ctrl_b;
- SCC_ctrl[Nchips].irq = hwcfg.irq;
- }
-
-
- for (chan = 0; chan < 2; chan++)
- {
- sprintf(device_name, "%s%i", SCC_DriverName, 2*Nchips+chan);
-
- SCC_Info[2*Nchips+chan].special = hwcfg.special;
- SCC_Info[2*Nchips+chan].clock = hwcfg.clock;
- SCC_Info[2*Nchips+chan].brand = hwcfg.brand;
- SCC_Info[2*Nchips+chan].option = hwcfg.option;
- SCC_Info[2*Nchips+chan].enhanced = hwcfg.escc;
-
-#ifdef SCC_DONT_CHECK
- printk(KERN_INFO "%s: data port = 0x%3.3x control port = 0x%3.3x\n",
- device_name,
- SCC_Info[2*Nchips+chan].data,
- SCC_Info[2*Nchips+chan].ctrl);
-
-#else
- printk(KERN_INFO "%s: data port = 0x%3.3lx control port = 0x%3.3lx -- %s\n",
- device_name,
- chan? hwcfg.data_b : hwcfg.data_a,
- chan? hwcfg.ctrl_b : hwcfg.ctrl_a,
- found? "found" : "missing");
-#endif
-
- if (found)
- {
- request_region(SCC_Info[2*Nchips+chan].ctrl, 1, "scc ctrl");
- request_region(SCC_Info[2*Nchips+chan].data, 1, "scc data");
- if (Nchips+chan != 0 &&
- scc_net_alloc(device_name,
- &SCC_Info[2*Nchips+chan]))
- return -EINVAL;
- }
- }
-
- if (found) Nchips++;
-
- return 0;
- }
-
- if (cmd == SIOCSCCINI)
- {
- if (!capable(CAP_SYS_RAWIO))
- return -EPERM;
-
- if (Nchips == 0)
- return -EINVAL;
-
- z8530_init();
- return 0;
- }
-
- return -EINVAL; /* confuse the user */
- }
-
- if (!scc->init)
- {
- if (cmd == SIOCSCCCHANINI)
- {
- if (!capable(CAP_NET_ADMIN)) return -EPERM;
- if (!arg) return -EINVAL;
-
- scc->stat.bufsize = SCC_BUFSIZE;
-
- if (copy_from_user(&scc->modem, arg, sizeof(struct scc_modem)))
- return -EINVAL;
-
- /* default KISS Params */
-
- if (scc->modem.speed < 4800)
- {
- scc->kiss.txdelay = 36; /* 360 ms */
- scc->kiss.persist = 42; /* 25% persistence */ /* was 25 */
- scc->kiss.slottime = 16; /* 160 ms */
- scc->kiss.tailtime = 4; /* minimal reasonable value */
- scc->kiss.fulldup = 0; /* CSMA */
- scc->kiss.waittime = 50; /* 500 ms */
- scc->kiss.maxkeyup = 10; /* 10 s */
- scc->kiss.mintime = 3; /* 3 s */
- scc->kiss.idletime = 30; /* 30 s */
- scc->kiss.maxdefer = 120; /* 2 min */
- scc->kiss.softdcd = 0; /* hardware dcd */
- } else {
- scc->kiss.txdelay = 10; /* 100 ms */
- scc->kiss.persist = 64; /* 25% persistence */ /* was 25 */
- scc->kiss.slottime = 8; /* 160 ms */
- scc->kiss.tailtime = 1; /* minimal reasonable value */
- scc->kiss.fulldup = 0; /* CSMA */
- scc->kiss.waittime = 50; /* 500 ms */
- scc->kiss.maxkeyup = 7; /* 7 s */
- scc->kiss.mintime = 3; /* 3 s */
- scc->kiss.idletime = 30; /* 30 s */
- scc->kiss.maxdefer = 120; /* 2 min */
- scc->kiss.softdcd = 0; /* hardware dcd */
- }
-
- scc->tx_buff = NULL;
- skb_queue_head_init(&scc->tx_queue);
- scc->init = 1;
-
- return 0;
- }
-
- return -EINVAL;
- }
-
- switch(cmd)
- {
- case SIOCSCCRESERVED:
- return -ENOIOCTLCMD;
-
- case SIOCSCCSMEM:
- if (!capable(CAP_SYS_RAWIO)) return -EPERM;
- if (!arg || copy_from_user(&memcfg, arg, sizeof(memcfg)))
- return -EINVAL;
- if (memcfg.bufsize < 16)
- return -EINVAL;
- scc->stat.bufsize = memcfg.bufsize;
- return 0;
-
- case SIOCSCCGSTAT:
- if (!arg || copy_to_user(arg, &scc->stat, sizeof(scc->stat)))
- return -EINVAL;
- return 0;
-
- case SIOCSCCGKISS:
- if (!arg || copy_from_user(&kiss_cmd, arg, sizeof(kiss_cmd)))
- return -EINVAL;
- kiss_cmd.param = scc_get_param(scc, kiss_cmd.command);
- if (copy_to_user(arg, &kiss_cmd, sizeof(kiss_cmd)))
- return -EINVAL;
- return 0;
-
- case SIOCSCCSKISS:
- if (!capable(CAP_NET_ADMIN)) return -EPERM;
- if (!arg || copy_from_user(&kiss_cmd, arg, sizeof(kiss_cmd)))
- return -EINVAL;
- return scc_set_param(scc, kiss_cmd.command, kiss_cmd.param);
-
- case SIOCSCCCAL:
- if (!capable(CAP_SYS_RAWIO)) return -EPERM;
- if (!arg || copy_from_user(&cal, arg, sizeof(cal)) || cal.time == 0)
- return -EINVAL;
-
- scc_start_calibrate(scc, cal.time, cal.pattern);
- return 0;
-
- default:
- return -ENOIOCTLCMD;
-
- }
-
- return -EINVAL;
-}
-
-/* ----> set interface callsign <---- */
-
-static int scc_net_set_mac_address(struct net_device *dev, void *addr)
-{
- struct sockaddr *sa = (struct sockaddr *) addr;
- dev_addr_set(dev, sa->sa_data);
- return 0;
-}
-
-/* ----> get statistics <---- */
-
-static struct net_device_stats *scc_net_get_stats(struct net_device *dev)
-{
- struct scc_channel *scc = (struct scc_channel *) dev->ml_priv;
-
- scc->dev_stat.rx_errors = scc->stat.rxerrs + scc->stat.rx_over;
- scc->dev_stat.tx_errors = scc->stat.txerrs + scc->stat.tx_under;
- scc->dev_stat.rx_fifo_errors = scc->stat.rx_over;
- scc->dev_stat.tx_fifo_errors = scc->stat.tx_under;
-
- return &scc->dev_stat;
-}
-
-/* ******************************************************************** */
-/* * dump statistics to /proc/net/z8530drv * */
-/* ******************************************************************** */
-
-#ifdef CONFIG_PROC_FS
-
-static inline struct scc_channel *scc_net_seq_idx(loff_t pos)
-{
- int k;
-
- for (k = 0; k < Nchips*2; ++k) {
- if (!SCC_Info[k].init)
- continue;
- if (pos-- == 0)
- return &SCC_Info[k];
- }
- return NULL;
-}
-
-static void *scc_net_seq_start(struct seq_file *seq, loff_t *pos)
-{
- return *pos ? scc_net_seq_idx(*pos - 1) : SEQ_START_TOKEN;
-
-}
-
-static void *scc_net_seq_next(struct seq_file *seq, void *v, loff_t *pos)
-{
- unsigned k;
- struct scc_channel *scc = v;
- ++*pos;
-
- for (k = (v == SEQ_START_TOKEN) ? 0 : (scc - SCC_Info)+1;
- k < Nchips*2; ++k) {
- if (SCC_Info[k].init)
- return &SCC_Info[k];
- }
- return NULL;
-}
-
-static void scc_net_seq_stop(struct seq_file *seq, void *v)
-{
-}
-
-static int scc_net_seq_show(struct seq_file *seq, void *v)
-{
- if (v == SEQ_START_TOKEN) {
- seq_puts(seq, "z8530drv-"VERSION"\n");
- } else if (!Driver_Initialized) {
- seq_puts(seq, "not initialized\n");
- } else if (!Nchips) {
- seq_puts(seq, "chips missing\n");
- } else {
- const struct scc_channel *scc = v;
- const struct scc_stat *stat = &scc->stat;
- const struct scc_kiss *kiss = &scc->kiss;
-
-
- /* dev data ctrl irq clock brand enh vector special option
- * baud nrz clocksrc softdcd bufsize
- * rxints txints exints spints
- * rcvd rxerrs over / xmit txerrs under / nospace bufsize
- * txd pers slot tail ful wait min maxk idl defr txof grp
- * W ## ## ## ## ## ## ## ## ## ## ## ## ## ## ## ##
- * R ## ## XX ## ## ## ## ## XX ## ## ## ## ## ## ##
- */
-
- seq_printf(seq, "%s\t%3.3lx %3.3lx %d %lu %2.2x %d %3.3lx %3.3lx %d\n",
- scc->dev->name,
- scc->data, scc->ctrl, scc->irq, scc->clock, scc->brand,
- scc->enhanced, Vector_Latch, scc->special,
- scc->option);
- seq_printf(seq, "\t%lu %d %d %d %d\n",
- scc->modem.speed, scc->modem.nrz,
- scc->modem.clocksrc, kiss->softdcd,
- stat->bufsize);
- seq_printf(seq, "\t%lu %lu %lu %lu\n",
- stat->rxints, stat->txints, stat->exints, stat->spints);
- seq_printf(seq, "\t%lu %lu %d / %lu %lu %d / %d %d\n",
- stat->rxframes, stat->rxerrs, stat->rx_over,
- stat->txframes, stat->txerrs, stat->tx_under,
- stat->nospace, stat->tx_state);
-
-#define K(x) kiss->x
- seq_printf(seq, "\t%d %d %d %d %d %d %d %d %d %d %d %d\n",
- K(txdelay), K(persist), K(slottime), K(tailtime),
- K(fulldup), K(waittime), K(mintime), K(maxkeyup),
- K(idletime), K(maxdefer), K(tx_inhibit), K(group));
-#undef K
-#ifdef SCC_DEBUG
- {
- int reg;
-
- seq_printf(seq, "\tW ");
- for (reg = 0; reg < 16; reg++)
- seq_printf(seq, "%2.2x ", scc->wreg[reg]);
- seq_printf(seq, "\n");
-
- seq_printf(seq, "\tR %2.2x %2.2x XX ", InReg(scc->ctrl,R0), InReg(scc->ctrl,R1));
- for (reg = 3; reg < 8; reg++)
- seq_printf(seq, "%2.2x ", InReg(scc->ctrl, reg));
- seq_printf(seq, "XX ");
- for (reg = 9; reg < 16; reg++)
- seq_printf(seq, "%2.2x ", InReg(scc->ctrl, reg));
- seq_printf(seq, "\n");
- }
-#endif
- seq_putc(seq, '\n');
- }
-
- return 0;
-}
-
-static const struct seq_operations scc_net_seq_ops = {
- .start = scc_net_seq_start,
- .next = scc_net_seq_next,
- .stop = scc_net_seq_stop,
- .show = scc_net_seq_show,
-};
-#endif /* CONFIG_PROC_FS */
-
-
-/* ******************************************************************** */
-/* * Init SCC driver * */
-/* ******************************************************************** */
-
-static int __init scc_init_driver (void)
-{
- char devname[IFNAMSIZ];
-
- printk(banner);
-
- sprintf(devname,"%s0", SCC_DriverName);
-
- rtnl_lock();
- if (scc_net_alloc(devname, SCC_Info)) {
- rtnl_unlock();
- printk(KERN_ERR "z8530drv: cannot initialize module\n");
- return -EIO;
- }
- rtnl_unlock();
-
- proc_create_seq("z8530drv", 0, init_net.proc_net, &scc_net_seq_ops);
-
- return 0;
-}
-
-static void __exit scc_cleanup_driver(void)
-{
- const unsigned int nr_irqs = irq_get_nr_irqs();
- io_port ctrl;
- int k;
- struct scc_channel *scc;
- struct net_device *dev;
-
- if (Nchips == 0 && (dev = SCC_Info[0].dev))
- {
- unregister_netdev(dev);
- free_netdev(dev);
- }
-
- /* Guard against chip prattle */
- local_irq_disable();
-
- for (k = 0; k < Nchips; k++)
- if ( (ctrl = SCC_ctrl[k].chan_A) )
- {
- Outb(ctrl, 0);
- OutReg(ctrl,R9,FHWRES); /* force hardware reset */
- udelay(50);
- }
-
- /* To unload the port must be closed so no real IRQ pending */
- for (k = 0; k < nr_irqs ; k++)
- if (Ivec[k].used) free_irq(k, NULL);
-
- local_irq_enable();
-
- /* Now clean up */
- for (k = 0; k < Nchips*2; k++)
- {
- scc = &SCC_Info[k];
- if (scc->ctrl)
- {
- release_region(scc->ctrl, 1);
- release_region(scc->data, 1);
- }
- if (scc->dev)
- {
- unregister_netdev(scc->dev);
- free_netdev(scc->dev);
- }
- }
-
-
- if (Vector_Latch)
- release_region(Vector_Latch, 1);
-
- remove_proc_entry("z8530drv", init_net.proc_net);
-}
-
-MODULE_AUTHOR("Joerg Reuter <jreuter@yaina.de>");
-MODULE_DESCRIPTION("AX.25 Device Driver for Z8530 based HDLC cards");
-MODULE_LICENSE("GPL");
-module_init(scc_init_driver);
-module_exit(scc_cleanup_driver);
+++ /dev/null
-// SPDX-License-Identifier: GPL-2.0-or-later
-/*****************************************************************************/
-
-/*
- * yam.c -- YAM radio modem driver.
- *
- * Copyright (C) 1998 Frederic Rible F1OAT (frible@teaser.fr)
- * Adapted from baycom.c driver written by Thomas Sailer (sailer@ife.ee.ethz.ch)
- *
- * Please note that the GPL allows you to use the driver, NOT the radio.
- * In order to use the radio, you need a license from the communications
- * authority of your country.
- *
- * History:
- * 0.0 F1OAT 06.06.98 Begin of work with baycom.c source code V 0.3
- * 0.1 F1OAT 07.06.98 Add timer polling routine for channel arbitration
- * 0.2 F6FBB 08.06.98 Added delay after FPGA programming
- * 0.3 F6FBB 29.07.98 Delayed PTT implementation for dupmode=2
- * 0.4 F6FBB 30.07.98 Added TxTail, Slottime and Persistence
- * 0.5 F6FBB 01.08.98 Shared IRQs, /proc/net and network statistics
- * 0.6 F6FBB 25.08.98 Added 1200Bds format
- * 0.7 F6FBB 12.09.98 Added to the kernel configuration
- * 0.8 F6FBB 14.10.98 Fixed slottime/persistence timing bug
- * OK1ZIA 2.09.01 Fixed "kfree_skb on hard IRQ"
- * using dev_kfree_skb_any(). (important in 2.4 kernel)
- */
-
-/*****************************************************************************/
-
-#include <linux/module.h>
-#include <linux/types.h>
-#include <linux/net.h>
-#include <linux/in.h>
-#include <linux/if.h>
-#include <linux/slab.h>
-#include <linux/errno.h>
-#include <linux/bitops.h>
-#include <linux/random.h>
-#include <asm/io.h>
-#include <linux/interrupt.h>
-#include <linux/ioport.h>
-#include <linux/firmware.h>
-#include <linux/platform_device.h>
-
-#include <linux/netdevice.h>
-#include <linux/if_arp.h>
-#include <linux/etherdevice.h>
-#include <linux/skbuff.h>
-#include <net/ax25.h>
-
-#include <linux/kernel.h>
-#include <linux/proc_fs.h>
-#include <linux/seq_file.h>
-#include <net/net_namespace.h>
-
-#include <linux/uaccess.h>
-#include <linux/init.h>
-
-#include <linux/yam.h>
-
-/* --------------------------------------------------------------------- */
-
-static const char yam_drvname[] = "yam";
-static const char yam_drvinfo[] __initconst = KERN_INFO \
- "YAM driver version 0.8 by F1OAT/F6FBB\n";
-
-/* --------------------------------------------------------------------- */
-
-#define FIRMWARE_9600 "yam/9600.bin"
-#define FIRMWARE_1200 "yam/1200.bin"
-
-#define YAM_9600 1
-#define YAM_1200 2
-
-#define NR_PORTS 4
-#define YAM_MAGIC 0xF10A7654
-
-/* Transmitter states */
-
-#define TX_OFF 0
-#define TX_HEAD 1
-#define TX_DATA 2
-#define TX_CRC1 3
-#define TX_CRC2 4
-#define TX_TAIL 5
-
-#define YAM_MAX_FRAME 1024
-
-#define DEFAULT_BITRATE 9600 /* bps */
-#define DEFAULT_HOLDD 10 /* sec */
-#define DEFAULT_TXD 300 /* ms */
-#define DEFAULT_TXTAIL 10 /* ms */
-#define DEFAULT_SLOT 100 /* ms */
-#define DEFAULT_PERS 64 /* 0->255 */
-
-struct yam_port {
- int magic;
- int bitrate;
- int baudrate;
- int iobase;
- int irq;
- int dupmode;
-
- struct net_device *dev;
-
- int nb_rxint;
- int nb_mdint;
-
- /* Parameters section */
-
- int txd; /* tx delay */
- int holdd; /* duplex ptt delay */
- int txtail; /* txtail delay */
- int slot; /* slottime */
- int pers; /* persistence */
-
- /* Tx section */
-
- int tx_state;
- int tx_count;
- int slotcnt;
- unsigned char tx_buf[YAM_MAX_FRAME];
- int tx_len;
- int tx_crcl, tx_crch;
- struct sk_buff_head send_queue; /* Packets awaiting transmission */
-
- /* Rx section */
-
- int dcd;
- unsigned char rx_buf[YAM_MAX_FRAME];
- int rx_len;
- int rx_crcl, rx_crch;
-};
-
-struct yam_mcs {
- unsigned char bits[YAM_FPGA_SIZE];
- int bitrate;
- struct yam_mcs *next;
-};
-
-static struct net_device *yam_devs[NR_PORTS];
-
-static struct yam_mcs *yam_data;
-
-static DEFINE_TIMER(yam_timer, NULL);
-
-/* --------------------------------------------------------------------- */
-
-#define RBR(iobase) (iobase+0)
-#define THR(iobase) (iobase+0)
-#define IER(iobase) (iobase+1)
-#define IIR(iobase) (iobase+2)
-#define FCR(iobase) (iobase+2)
-#define LCR(iobase) (iobase+3)
-#define MCR(iobase) (iobase+4)
-#define LSR(iobase) (iobase+5)
-#define MSR(iobase) (iobase+6)
-#define SCR(iobase) (iobase+7)
-#define DLL(iobase) (iobase+0)
-#define DLM(iobase) (iobase+1)
-
-#define YAM_EXTENT 8
-
-/* Interrupt Identification Register Bit Masks */
-#define IIR_NOPEND 1
-#define IIR_MSR 0
-#define IIR_TX 2
-#define IIR_RX 4
-#define IIR_LSR 6
-#define IIR_TIMEOUT 12 /* Fifo mode only */
-
-#define IIR_MASK 0x0F
-
-/* Interrupt Enable Register Bit Masks */
-#define IER_RX 1 /* enable rx interrupt */
-#define IER_TX 2 /* enable tx interrupt */
-#define IER_LSR 4 /* enable line status interrupts */
-#define IER_MSR 8 /* enable modem status interrupts */
-
-/* Modem Control Register Bit Masks */
-#define MCR_DTR 0x01 /* DTR output */
-#define MCR_RTS 0x02 /* RTS output */
-#define MCR_OUT1 0x04 /* OUT1 output (not accessible in RS232) */
-#define MCR_OUT2 0x08 /* Master Interrupt enable (must be set on PCs) */
-#define MCR_LOOP 0x10 /* Loopback enable */
-
-/* Modem Status Register Bit Masks */
-#define MSR_DCTS 0x01 /* Delta CTS input */
-#define MSR_DDSR 0x02 /* Delta DSR */
-#define MSR_DRIN 0x04 /* Delta RI */
-#define MSR_DDCD 0x08 /* Delta DCD */
-#define MSR_CTS 0x10 /* CTS input */
-#define MSR_DSR 0x20 /* DSR input */
-#define MSR_RING 0x40 /* RI input */
-#define MSR_DCD 0x80 /* DCD input */
-
-/* line status register bit mask */
-#define LSR_RXC 0x01
-#define LSR_OE 0x02
-#define LSR_PE 0x04
-#define LSR_FE 0x08
-#define LSR_BREAK 0x10
-#define LSR_THRE 0x20
-#define LSR_TSRE 0x40
-
-/* Line Control Register Bit Masks */
-#define LCR_DLAB 0x80
-#define LCR_BREAK 0x40
-#define LCR_PZERO 0x28
-#define LCR_PEVEN 0x18
-#define LCR_PODD 0x08
-#define LCR_STOP1 0x00
-#define LCR_STOP2 0x04
-#define LCR_BIT5 0x00
-#define LCR_BIT6 0x02
-#define LCR_BIT7 0x01
-#define LCR_BIT8 0x03
-
-/* YAM Modem <-> UART Port mapping */
-
-#define TX_RDY MSR_DCTS /* transmitter ready to send */
-#define RX_DCD MSR_DCD /* carrier detect */
-#define RX_FLAG MSR_RING /* hdlc flag received */
-#define FPGA_DONE MSR_DSR /* FPGA is configured */
-#define PTT_ON (MCR_RTS|MCR_OUT2) /* activate PTT */
-#define PTT_OFF (MCR_DTR|MCR_OUT2) /* release PTT */
-
-#define ENABLE_RXINT IER_RX /* enable uart rx interrupt during rx */
-#define ENABLE_TXINT IER_MSR /* enable uart ms interrupt during tx */
-#define ENABLE_RTXINT (IER_RX|IER_MSR) /* full duplex operations */
-
-
-/*************************************************************************
-* CRC Tables
-************************************************************************/
-
-static const unsigned char chktabl[256] =
-{0x00, 0x89, 0x12, 0x9b, 0x24, 0xad, 0x36, 0xbf, 0x48, 0xc1, 0x5a, 0xd3, 0x6c, 0xe5, 0x7e,
- 0xf7, 0x81, 0x08, 0x93, 0x1a, 0xa5, 0x2c, 0xb7, 0x3e, 0xc9, 0x40, 0xdb, 0x52, 0xed, 0x64,
- 0xff, 0x76, 0x02, 0x8b, 0x10, 0x99, 0x26, 0xaf, 0x34, 0xbd, 0x4a, 0xc3, 0x58, 0xd1, 0x6e,
- 0xe7, 0x7c, 0xf5, 0x83, 0x0a, 0x91, 0x18, 0xa7, 0x2e, 0xb5, 0x3c, 0xcb, 0x42, 0xd9, 0x50,
- 0xef, 0x66, 0xfd, 0x74, 0x04, 0x8d, 0x16, 0x9f, 0x20, 0xa9, 0x32, 0xbb, 0x4c, 0xc5, 0x5e,
- 0xd7, 0x68, 0xe1, 0x7a, 0xf3, 0x85, 0x0c, 0x97, 0x1e, 0xa1, 0x28, 0xb3, 0x3a, 0xcd, 0x44,
- 0xdf, 0x56, 0xe9, 0x60, 0xfb, 0x72, 0x06, 0x8f, 0x14, 0x9d, 0x22, 0xab, 0x30, 0xb9, 0x4e,
- 0xc7, 0x5c, 0xd5, 0x6a, 0xe3, 0x78, 0xf1, 0x87, 0x0e, 0x95, 0x1c, 0xa3, 0x2a, 0xb1, 0x38,
- 0xcf, 0x46, 0xdd, 0x54, 0xeb, 0x62, 0xf9, 0x70, 0x08, 0x81, 0x1a, 0x93, 0x2c, 0xa5, 0x3e,
- 0xb7, 0x40, 0xc9, 0x52, 0xdb, 0x64, 0xed, 0x76, 0xff, 0x89, 0x00, 0x9b, 0x12, 0xad, 0x24,
- 0xbf, 0x36, 0xc1, 0x48, 0xd3, 0x5a, 0xe5, 0x6c, 0xf7, 0x7e, 0x0a, 0x83, 0x18, 0x91, 0x2e,
- 0xa7, 0x3c, 0xb5, 0x42, 0xcb, 0x50, 0xd9, 0x66, 0xef, 0x74, 0xfd, 0x8b, 0x02, 0x99, 0x10,
- 0xaf, 0x26, 0xbd, 0x34, 0xc3, 0x4a, 0xd1, 0x58, 0xe7, 0x6e, 0xf5, 0x7c, 0x0c, 0x85, 0x1e,
- 0x97, 0x28, 0xa1, 0x3a, 0xb3, 0x44, 0xcd, 0x56, 0xdf, 0x60, 0xe9, 0x72, 0xfb, 0x8d, 0x04,
- 0x9f, 0x16, 0xa9, 0x20, 0xbb, 0x32, 0xc5, 0x4c, 0xd7, 0x5e, 0xe1, 0x68, 0xf3, 0x7a, 0x0e,
- 0x87, 0x1c, 0x95, 0x2a, 0xa3, 0x38, 0xb1, 0x46, 0xcf, 0x54, 0xdd, 0x62, 0xeb, 0x70, 0xf9,
- 0x8f, 0x06, 0x9d, 0x14, 0xab, 0x22, 0xb9, 0x30, 0xc7, 0x4e, 0xd5, 0x5c, 0xe3, 0x6a, 0xf1,
- 0x78};
-static const unsigned char chktabh[256] =
-{0x00, 0x11, 0x23, 0x32, 0x46, 0x57, 0x65, 0x74, 0x8c, 0x9d, 0xaf, 0xbe, 0xca, 0xdb, 0xe9,
- 0xf8, 0x10, 0x01, 0x33, 0x22, 0x56, 0x47, 0x75, 0x64, 0x9c, 0x8d, 0xbf, 0xae, 0xda, 0xcb,
- 0xf9, 0xe8, 0x21, 0x30, 0x02, 0x13, 0x67, 0x76, 0x44, 0x55, 0xad, 0xbc, 0x8e, 0x9f, 0xeb,
- 0xfa, 0xc8, 0xd9, 0x31, 0x20, 0x12, 0x03, 0x77, 0x66, 0x54, 0x45, 0xbd, 0xac, 0x9e, 0x8f,
- 0xfb, 0xea, 0xd8, 0xc9, 0x42, 0x53, 0x61, 0x70, 0x04, 0x15, 0x27, 0x36, 0xce, 0xdf, 0xed,
- 0xfc, 0x88, 0x99, 0xab, 0xba, 0x52, 0x43, 0x71, 0x60, 0x14, 0x05, 0x37, 0x26, 0xde, 0xcf,
- 0xfd, 0xec, 0x98, 0x89, 0xbb, 0xaa, 0x63, 0x72, 0x40, 0x51, 0x25, 0x34, 0x06, 0x17, 0xef,
- 0xfe, 0xcc, 0xdd, 0xa9, 0xb8, 0x8a, 0x9b, 0x73, 0x62, 0x50, 0x41, 0x35, 0x24, 0x16, 0x07,
- 0xff, 0xee, 0xdc, 0xcd, 0xb9, 0xa8, 0x9a, 0x8b, 0x84, 0x95, 0xa7, 0xb6, 0xc2, 0xd3, 0xe1,
- 0xf0, 0x08, 0x19, 0x2b, 0x3a, 0x4e, 0x5f, 0x6d, 0x7c, 0x94, 0x85, 0xb7, 0xa6, 0xd2, 0xc3,
- 0xf1, 0xe0, 0x18, 0x09, 0x3b, 0x2a, 0x5e, 0x4f, 0x7d, 0x6c, 0xa5, 0xb4, 0x86, 0x97, 0xe3,
- 0xf2, 0xc0, 0xd1, 0x29, 0x38, 0x0a, 0x1b, 0x6f, 0x7e, 0x4c, 0x5d, 0xb5, 0xa4, 0x96, 0x87,
- 0xf3, 0xe2, 0xd0, 0xc1, 0x39, 0x28, 0x1a, 0x0b, 0x7f, 0x6e, 0x5c, 0x4d, 0xc6, 0xd7, 0xe5,
- 0xf4, 0x80, 0x91, 0xa3, 0xb2, 0x4a, 0x5b, 0x69, 0x78, 0x0c, 0x1d, 0x2f, 0x3e, 0xd6, 0xc7,
- 0xf5, 0xe4, 0x90, 0x81, 0xb3, 0xa2, 0x5a, 0x4b, 0x79, 0x68, 0x1c, 0x0d, 0x3f, 0x2e, 0xe7,
- 0xf6, 0xc4, 0xd5, 0xa1, 0xb0, 0x82, 0x93, 0x6b, 0x7a, 0x48, 0x59, 0x2d, 0x3c, 0x0e, 0x1f,
- 0xf7, 0xe6, 0xd4, 0xc5, 0xb1, 0xa0, 0x92, 0x83, 0x7b, 0x6a, 0x58, 0x49, 0x3d, 0x2c, 0x1e,
- 0x0f};
-
-/*************************************************************************
-* FPGA functions
-************************************************************************/
-
-static void delay(int ms)
-{
- unsigned long timeout = jiffies + ((ms * HZ) / 1000);
- while (time_before(jiffies, timeout))
- cpu_relax();
-}
-
-/*
- * reset FPGA
- */
-
-static void fpga_reset(int iobase)
-{
- outb(0, IER(iobase));
- outb(LCR_DLAB | LCR_BIT5, LCR(iobase));
- outb(1, DLL(iobase));
- outb(0, DLM(iobase));
-
- outb(LCR_BIT5, LCR(iobase));
- inb(LSR(iobase));
- inb(MSR(iobase));
- /* turn off FPGA supply voltage */
- outb(MCR_OUT1 | MCR_OUT2, MCR(iobase));
- delay(100);
- /* turn on FPGA supply voltage again */
- outb(MCR_DTR | MCR_RTS | MCR_OUT1 | MCR_OUT2, MCR(iobase));
- delay(100);
-}
-
-/*
- * send one byte to FPGA
- */
-
-static int fpga_write(int iobase, unsigned char wrd)
-{
- unsigned char bit;
- int k;
- unsigned long timeout = jiffies + HZ / 10;
-
- for (k = 0; k < 8; k++) {
- bit = (wrd & 0x80) ? (MCR_RTS | MCR_DTR) : MCR_DTR;
- outb(bit | MCR_OUT1 | MCR_OUT2, MCR(iobase));
- wrd <<= 1;
- outb(0xfc, THR(iobase));
- while ((inb(LSR(iobase)) & LSR_TSRE) == 0)
- if (time_after(jiffies, timeout))
- return -1;
- }
-
- return 0;
-}
-
-/*
- * predef should be 0 for loading user defined mcs
- * predef should be YAM_1200 for loading predef 1200 mcs
- * predef should be YAM_9600 for loading predef 9600 mcs
- */
-static unsigned char *add_mcs(unsigned char *bits, int bitrate,
- unsigned int predef)
-{
- const char *fw_name[2] = {FIRMWARE_9600, FIRMWARE_1200};
- const struct firmware *fw;
- struct platform_device *pdev;
- struct yam_mcs *p;
- int err;
-
- switch (predef) {
- case 0:
- fw = NULL;
- break;
- case YAM_1200:
- case YAM_9600:
- predef--;
- pdev = platform_device_register_simple("yam", 0, NULL, 0);
- if (IS_ERR(pdev)) {
- printk(KERN_ERR "yam: Failed to register firmware\n");
- return NULL;
- }
- err = request_firmware(&fw, fw_name[predef], &pdev->dev);
- platform_device_unregister(pdev);
- if (err) {
- printk(KERN_ERR "Failed to load firmware \"%s\"\n",
- fw_name[predef]);
- return NULL;
- }
- if (fw->size != YAM_FPGA_SIZE) {
- printk(KERN_ERR "Bogus length %zu in firmware \"%s\"\n",
- fw->size, fw_name[predef]);
- release_firmware(fw);
- return NULL;
- }
- bits = (unsigned char *)fw->data;
- break;
- default:
- printk(KERN_ERR "yam: Invalid predef number %u\n", predef);
- return NULL;
- }
-
- /* If it already exists, replace the bit data */
- p = yam_data;
- while (p) {
- if (p->bitrate == bitrate) {
- memcpy(p->bits, bits, YAM_FPGA_SIZE);
- goto out;
- }
- p = p->next;
- }
-
- /* Allocate a new mcs */
- if ((p = kmalloc_obj(struct yam_mcs)) == NULL) {
- release_firmware(fw);
- return NULL;
- }
- memcpy(p->bits, bits, YAM_FPGA_SIZE);
- p->bitrate = bitrate;
- p->next = yam_data;
- yam_data = p;
- out:
- release_firmware(fw);
- return p->bits;
-}
-
-static unsigned char *get_mcs(int bitrate)
-{
- struct yam_mcs *p;
-
- p = yam_data;
- while (p) {
- if (p->bitrate == bitrate)
- return p->bits;
- p = p->next;
- }
-
- /* Load predefined mcs data */
- switch (bitrate) {
- case 1200:
- /* setting predef as YAM_1200 for loading predef 1200 mcs */
- return add_mcs(NULL, bitrate, YAM_1200);
- default:
- /* setting predef as YAM_9600 for loading predef 9600 mcs */
- return add_mcs(NULL, bitrate, YAM_9600);
- }
-}
-
-/*
- * download bitstream to FPGA
- * data is contained in bits[] array in yam1200.h resp. yam9600.h
- */
-
-static int fpga_download(int iobase, int bitrate)
-{
- int i, rc;
- unsigned char *pbits;
-
- pbits = get_mcs(bitrate);
- if (pbits == NULL)
- return -1;
-
- fpga_reset(iobase);
- for (i = 0; i < YAM_FPGA_SIZE; i++) {
- if (fpga_write(iobase, pbits[i])) {
- printk(KERN_ERR "yam: error in write cycle\n");
- return -1; /* write... */
- }
- }
-
- fpga_write(iobase, 0xFF);
- rc = inb(MSR(iobase)); /* check DONE signal */
-
- /* Needed for some hardwares */
- delay(50);
-
- return (rc & MSR_DSR) ? 0 : -1;
-}
-
-
-/************************************************************************
-* Serial port init
-************************************************************************/
-
-static void yam_set_uart(struct net_device *dev)
-{
- struct yam_port *yp = netdev_priv(dev);
- int divisor = 115200 / yp->baudrate;
-
- outb(0, IER(dev->base_addr));
- outb(LCR_DLAB | LCR_BIT8, LCR(dev->base_addr));
- outb(divisor, DLL(dev->base_addr));
- outb(0, DLM(dev->base_addr));
- outb(LCR_BIT8, LCR(dev->base_addr));
- outb(PTT_OFF, MCR(dev->base_addr));
- outb(0x00, FCR(dev->base_addr));
-
- /* Flush pending irq */
-
- inb(RBR(dev->base_addr));
- inb(MSR(dev->base_addr));
-
- /* Enable rx irq */
-
- outb(ENABLE_RTXINT, IER(dev->base_addr));
-}
-
-
-/* --------------------------------------------------------------------- */
-
-enum uart {
- c_uart_unknown, c_uart_8250,
- c_uart_16450, c_uart_16550, c_uart_16550A
-};
-
-static const char *uart_str[] =
-{"unknown", "8250", "16450", "16550", "16550A"};
-
-static enum uart yam_check_uart(unsigned int iobase)
-{
- unsigned char b1, b2, b3;
- enum uart u;
- enum uart uart_tab[] =
- {c_uart_16450, c_uart_unknown, c_uart_16550, c_uart_16550A};
-
- b1 = inb(MCR(iobase));
- outb(b1 | 0x10, MCR(iobase)); /* loopback mode */
- b2 = inb(MSR(iobase));
- outb(0x1a, MCR(iobase));
- b3 = inb(MSR(iobase)) & 0xf0;
- outb(b1, MCR(iobase)); /* restore old values */
- outb(b2, MSR(iobase));
- if (b3 != 0x90)
- return c_uart_unknown;
- inb(RBR(iobase));
- inb(RBR(iobase));
- outb(0x01, FCR(iobase)); /* enable FIFOs */
- u = uart_tab[(inb(IIR(iobase)) >> 6) & 3];
- if (u == c_uart_16450) {
- outb(0x5a, SCR(iobase));
- b1 = inb(SCR(iobase));
- outb(0xa5, SCR(iobase));
- b2 = inb(SCR(iobase));
- if ((b1 != 0x5a) || (b2 != 0xa5))
- u = c_uart_8250;
- }
- return u;
-}
-
-/******************************************************************************
-* Rx Section
-******************************************************************************/
-static inline void yam_rx_flag(struct net_device *dev, struct yam_port *yp)
-{
- if (yp->dcd && yp->rx_len >= 3 && yp->rx_len < YAM_MAX_FRAME) {
- int pkt_len = yp->rx_len - 2 + 1; /* -CRC + kiss */
- struct sk_buff *skb;
-
- if ((yp->rx_crch & yp->rx_crcl) != 0xFF) {
- /* Bad crc */
- } else {
- if (!(skb = dev_alloc_skb(pkt_len))) {
- printk(KERN_WARNING "%s: memory squeeze, dropping packet\n", dev->name);
- ++dev->stats.rx_dropped;
- } else {
- unsigned char *cp;
- cp = skb_put(skb, pkt_len);
- *cp++ = 0; /* KISS kludge */
- memcpy(cp, yp->rx_buf, pkt_len - 1);
- skb->protocol = ax25_type_trans(skb, dev);
- netif_rx(skb);
- ++dev->stats.rx_packets;
- }
- }
- }
- yp->rx_len = 0;
- yp->rx_crcl = 0x21;
- yp->rx_crch = 0xf3;
-}
-
-static inline void yam_rx_byte(struct net_device *dev, struct yam_port *yp, unsigned char rxb)
-{
- if (yp->rx_len < YAM_MAX_FRAME) {
- unsigned char c = yp->rx_crcl;
- yp->rx_crcl = (chktabl[c] ^ yp->rx_crch);
- yp->rx_crch = (chktabh[c] ^ rxb);
- yp->rx_buf[yp->rx_len++] = rxb;
- }
-}
-
-/********************************************************************************
-* TX Section
-********************************************************************************/
-
-static void ptt_on(struct net_device *dev)
-{
- outb(PTT_ON, MCR(dev->base_addr));
-}
-
-static void ptt_off(struct net_device *dev)
-{
- outb(PTT_OFF, MCR(dev->base_addr));
-}
-
-static netdev_tx_t yam_send_packet(struct sk_buff *skb,
- struct net_device *dev)
-{
- struct yam_port *yp = netdev_priv(dev);
-
- if (skb->protocol == htons(ETH_P_IP))
- return ax25_ip_xmit(skb);
-
- skb_queue_tail(&yp->send_queue, skb);
- netif_trans_update(dev);
- return NETDEV_TX_OK;
-}
-
-static void yam_start_tx(struct net_device *dev, struct yam_port *yp)
-{
- if ((yp->tx_state == TX_TAIL) || (yp->txd == 0))
- yp->tx_count = 1;
- else
- yp->tx_count = (yp->bitrate * yp->txd) / 8000;
- yp->tx_state = TX_HEAD;
- ptt_on(dev);
-}
-
-static void yam_arbitrate(struct net_device *dev)
-{
- struct yam_port *yp = netdev_priv(dev);
-
- if (yp->magic != YAM_MAGIC || yp->tx_state != TX_OFF ||
- skb_queue_empty(&yp->send_queue))
- return;
- /* tx_state is TX_OFF and there is data to send */
-
- if (yp->dupmode) {
- /* Full duplex mode, don't wait */
- yam_start_tx(dev, yp);
- return;
- }
- if (yp->dcd) {
- /* DCD on, wait slotime ... */
- yp->slotcnt = yp->slot / 10;
- return;
- }
- /* Is slottime passed ? */
- if ((--yp->slotcnt) > 0)
- return;
-
- yp->slotcnt = yp->slot / 10;
-
- /* is random > persist ? */
- if (get_random_u8() > yp->pers)
- return;
-
- yam_start_tx(dev, yp);
-}
-
-static void yam_dotimer(struct timer_list *unused)
-{
- int i;
-
- for (i = 0; i < NR_PORTS; i++) {
- struct net_device *dev = yam_devs[i];
- if (dev && netif_running(dev))
- yam_arbitrate(dev);
- }
- yam_timer.expires = jiffies + HZ / 100;
- add_timer(&yam_timer);
-}
-
-static void yam_tx_byte(struct net_device *dev, struct yam_port *yp)
-{
- struct sk_buff *skb;
- unsigned char b, temp;
-
- switch (yp->tx_state) {
- case TX_OFF:
- break;
- case TX_HEAD:
- if (--yp->tx_count <= 0) {
- if (!(skb = skb_dequeue(&yp->send_queue))) {
- ptt_off(dev);
- yp->tx_state = TX_OFF;
- break;
- }
- yp->tx_state = TX_DATA;
- if (skb->data[0] != 0) {
-/* do_kiss_params(s, skb->data, skb->len); */
- dev_kfree_skb_any(skb);
- break;
- }
- yp->tx_len = skb->len - 1; /* strip KISS byte */
- if (yp->tx_len >= YAM_MAX_FRAME || yp->tx_len < 2) {
- dev_kfree_skb_any(skb);
- break;
- }
- skb_copy_from_linear_data_offset(skb, 1,
- yp->tx_buf,
- yp->tx_len);
- dev_kfree_skb_any(skb);
- yp->tx_count = 0;
- yp->tx_crcl = 0x21;
- yp->tx_crch = 0xf3;
- yp->tx_state = TX_DATA;
- }
- break;
- case TX_DATA:
- b = yp->tx_buf[yp->tx_count++];
- outb(b, THR(dev->base_addr));
- temp = yp->tx_crcl;
- yp->tx_crcl = chktabl[temp] ^ yp->tx_crch;
- yp->tx_crch = chktabh[temp] ^ b;
- if (yp->tx_count >= yp->tx_len) {
- yp->tx_state = TX_CRC1;
- }
- break;
- case TX_CRC1:
- yp->tx_crch = chktabl[yp->tx_crcl] ^ yp->tx_crch;
- yp->tx_crcl = chktabh[yp->tx_crcl] ^ chktabl[yp->tx_crch] ^ 0xff;
- outb(yp->tx_crcl, THR(dev->base_addr));
- yp->tx_state = TX_CRC2;
- break;
- case TX_CRC2:
- outb(chktabh[yp->tx_crch] ^ 0xFF, THR(dev->base_addr));
- if (skb_queue_empty(&yp->send_queue)) {
- yp->tx_count = (yp->bitrate * yp->txtail) / 8000;
- if (yp->dupmode == 2)
- yp->tx_count += (yp->bitrate * yp->holdd) / 8;
- if (yp->tx_count == 0)
- yp->tx_count = 1;
- yp->tx_state = TX_TAIL;
- } else {
- yp->tx_count = 1;
- yp->tx_state = TX_HEAD;
- }
- ++dev->stats.tx_packets;
- break;
- case TX_TAIL:
- if (--yp->tx_count <= 0) {
- yp->tx_state = TX_OFF;
- ptt_off(dev);
- }
- break;
- }
-}
-
-/***********************************************************************************
-* ISR routine
-************************************************************************************/
-
-static irqreturn_t yam_interrupt(int irq, void *dev_id)
-{
- struct net_device *dev;
- struct yam_port *yp;
- unsigned char iir;
- int counter = 100;
- int i;
- int handled = 0;
-
- for (i = 0; i < NR_PORTS; i++) {
- dev = yam_devs[i];
- yp = netdev_priv(dev);
-
- if (!netif_running(dev))
- continue;
-
- while ((iir = IIR_MASK & inb(IIR(dev->base_addr))) != IIR_NOPEND) {
- unsigned char msr = inb(MSR(dev->base_addr));
- unsigned char lsr = inb(LSR(dev->base_addr));
- unsigned char rxb;
-
- handled = 1;
-
- if (lsr & LSR_OE)
- ++dev->stats.rx_fifo_errors;
-
- yp->dcd = (msr & RX_DCD) ? 1 : 0;
-
- if (--counter <= 0) {
- printk(KERN_ERR "%s: too many irq iir=%d\n",
- dev->name, iir);
- goto out;
- }
- if (msr & TX_RDY) {
- ++yp->nb_mdint;
- yam_tx_byte(dev, yp);
- }
- if (lsr & LSR_RXC) {
- ++yp->nb_rxint;
- rxb = inb(RBR(dev->base_addr));
- if (msr & RX_FLAG)
- yam_rx_flag(dev, yp);
- else
- yam_rx_byte(dev, yp, rxb);
- }
- }
- }
-out:
- return IRQ_RETVAL(handled);
-}
-
-#ifdef CONFIG_PROC_FS
-
-static void *yam_seq_start(struct seq_file *seq, loff_t *pos)
-{
- return (*pos < NR_PORTS) ? yam_devs[*pos] : NULL;
-}
-
-static void *yam_seq_next(struct seq_file *seq, void *v, loff_t *pos)
-{
- ++*pos;
- return (*pos < NR_PORTS) ? yam_devs[*pos] : NULL;
-}
-
-static void yam_seq_stop(struct seq_file *seq, void *v)
-{
-}
-
-static int yam_seq_show(struct seq_file *seq, void *v)
-{
- struct net_device *dev = v;
- const struct yam_port *yp = netdev_priv(dev);
-
- seq_printf(seq, "Device %s\n", dev->name);
- seq_printf(seq, " Up %d\n", netif_running(dev));
- seq_printf(seq, " Speed %u\n", yp->bitrate);
- seq_printf(seq, " IoBase 0x%x\n", yp->iobase);
- seq_printf(seq, " BaudRate %u\n", yp->baudrate);
- seq_printf(seq, " IRQ %u\n", yp->irq);
- seq_printf(seq, " TxState %u\n", yp->tx_state);
- seq_printf(seq, " Duplex %u\n", yp->dupmode);
- seq_printf(seq, " HoldDly %u\n", yp->holdd);
- seq_printf(seq, " TxDelay %u\n", yp->txd);
- seq_printf(seq, " TxTail %u\n", yp->txtail);
- seq_printf(seq, " SlotTime %u\n", yp->slot);
- seq_printf(seq, " Persist %u\n", yp->pers);
- seq_printf(seq, " TxFrames %lu\n", dev->stats.tx_packets);
- seq_printf(seq, " RxFrames %lu\n", dev->stats.rx_packets);
- seq_printf(seq, " TxInt %u\n", yp->nb_mdint);
- seq_printf(seq, " RxInt %u\n", yp->nb_rxint);
- seq_printf(seq, " RxOver %lu\n", dev->stats.rx_fifo_errors);
- seq_printf(seq, "\n");
- return 0;
-}
-
-static const struct seq_operations yam_seqops = {
- .start = yam_seq_start,
- .next = yam_seq_next,
- .stop = yam_seq_stop,
- .show = yam_seq_show,
-};
-#endif
-
-
-/* --------------------------------------------------------------------- */
-
-static int yam_open(struct net_device *dev)
-{
- struct yam_port *yp = netdev_priv(dev);
- enum uart u;
- int i;
- int ret=0;
-
- printk(KERN_INFO "Trying %s at iobase 0x%lx irq %u\n", dev->name, dev->base_addr, dev->irq);
-
- if (!yp->bitrate)
- return -ENXIO;
- if (!dev->base_addr || dev->base_addr > 0x1000 - YAM_EXTENT ||
- dev->irq < 2 || dev->irq > 15) {
- return -ENXIO;
- }
- if (!request_region(dev->base_addr, YAM_EXTENT, dev->name))
- {
- printk(KERN_ERR "%s: cannot 0x%lx busy\n", dev->name, dev->base_addr);
- return -EACCES;
- }
- if ((u = yam_check_uart(dev->base_addr)) == c_uart_unknown) {
- printk(KERN_ERR "%s: cannot find uart type\n", dev->name);
- ret = -EIO;
- goto out_release_base;
- }
- if (fpga_download(dev->base_addr, yp->bitrate)) {
- printk(KERN_ERR "%s: cannot init FPGA\n", dev->name);
- ret = -EIO;
- goto out_release_base;
- }
- outb(0, IER(dev->base_addr));
- if (request_irq(dev->irq, yam_interrupt, IRQF_SHARED, dev->name, dev)) {
- printk(KERN_ERR "%s: irq %d busy\n", dev->name, dev->irq);
- ret = -EBUSY;
- goto out_release_base;
- }
-
- yam_set_uart(dev);
-
- netif_start_queue(dev);
-
- yp->slotcnt = yp->slot / 10;
-
- /* Reset overruns for all ports - FPGA programming makes overruns */
- for (i = 0; i < NR_PORTS; i++) {
- struct net_device *yam_dev = yam_devs[i];
-
- inb(LSR(yam_dev->base_addr));
- yam_dev->stats.rx_fifo_errors = 0;
- }
-
- printk(KERN_INFO "%s at iobase 0x%lx irq %u uart %s\n", dev->name, dev->base_addr, dev->irq,
- uart_str[u]);
- return 0;
-
-out_release_base:
- release_region(dev->base_addr, YAM_EXTENT);
- return ret;
-}
-
-/* --------------------------------------------------------------------- */
-
-static int yam_close(struct net_device *dev)
-{
- struct sk_buff *skb;
- struct yam_port *yp = netdev_priv(dev);
-
- if (!dev)
- return -EINVAL;
-
- /*
- * disable interrupts
- */
- outb(0, IER(dev->base_addr));
- outb(1, MCR(dev->base_addr));
- /* Remove IRQ handler if last */
- free_irq(dev->irq,dev);
- release_region(dev->base_addr, YAM_EXTENT);
- netif_stop_queue(dev);
- while ((skb = skb_dequeue(&yp->send_queue)))
- dev_kfree_skb(skb);
-
- printk(KERN_INFO "%s: close yam at iobase 0x%lx irq %u\n",
- yam_drvname, dev->base_addr, dev->irq);
- return 0;
-}
-
-/* --------------------------------------------------------------------- */
-
-static int yam_siocdevprivate(struct net_device *dev, struct ifreq *ifr, void __user *data, int cmd)
-{
- struct yam_port *yp = netdev_priv(dev);
- struct yamdrv_ioctl_cfg yi;
- struct yamdrv_ioctl_mcs *ym;
- int ioctl_cmd;
-
- if (copy_from_user(&ioctl_cmd, data, sizeof(int)))
- return -EFAULT;
-
- if (yp->magic != YAM_MAGIC)
- return -EINVAL;
-
- if (!capable(CAP_NET_ADMIN))
- return -EPERM;
-
- if (cmd != SIOCDEVPRIVATE)
- return -EINVAL;
-
- switch (ioctl_cmd) {
-
- case SIOCYAMRESERVED:
- return -EINVAL; /* unused */
-
- case SIOCYAMSMCS:
- if (netif_running(dev))
- return -EINVAL; /* Cannot change this parameter when up */
- ym = memdup_user(data, sizeof(struct yamdrv_ioctl_mcs));
- if (IS_ERR(ym))
- return PTR_ERR(ym);
- if (ym->cmd != SIOCYAMSMCS || ym->bitrate > YAM_MAXBITRATE) {
- kfree(ym);
- return -EINVAL;
- }
- /* setting predef as 0 for loading userdefined mcs data */
- add_mcs(ym->bits, ym->bitrate, 0);
- kfree(ym);
- break;
-
- case SIOCYAMSCFG:
- if (!capable(CAP_SYS_RAWIO))
- return -EPERM;
- if (copy_from_user(&yi, data, sizeof(struct yamdrv_ioctl_cfg)))
- return -EFAULT;
-
- if (yi.cmd != SIOCYAMSCFG)
- return -EINVAL;
- if ((yi.cfg.mask & YAM_IOBASE) && netif_running(dev))
- return -EINVAL; /* Cannot change this parameter when up */
- if ((yi.cfg.mask & YAM_IRQ) && netif_running(dev))
- return -EINVAL; /* Cannot change this parameter when up */
- if ((yi.cfg.mask & YAM_BITRATE) && netif_running(dev))
- return -EINVAL; /* Cannot change this parameter when up */
- if ((yi.cfg.mask & YAM_BAUDRATE) && netif_running(dev))
- return -EINVAL; /* Cannot change this parameter when up */
-
- if (yi.cfg.mask & YAM_IOBASE) {
- yp->iobase = yi.cfg.iobase;
- dev->base_addr = yi.cfg.iobase;
- }
- if (yi.cfg.mask & YAM_IRQ) {
- if (yi.cfg.irq > 15)
- return -EINVAL;
- yp->irq = yi.cfg.irq;
- dev->irq = yi.cfg.irq;
- }
- if (yi.cfg.mask & YAM_BITRATE) {
- if (yi.cfg.bitrate > YAM_MAXBITRATE)
- return -EINVAL;
- yp->bitrate = yi.cfg.bitrate;
- }
- if (yi.cfg.mask & YAM_BAUDRATE) {
- if (yi.cfg.baudrate > YAM_MAXBAUDRATE)
- return -EINVAL;
- yp->baudrate = yi.cfg.baudrate;
- }
- if (yi.cfg.mask & YAM_MODE) {
- if (yi.cfg.mode > YAM_MAXMODE)
- return -EINVAL;
- yp->dupmode = yi.cfg.mode;
- }
- if (yi.cfg.mask & YAM_HOLDDLY) {
- if (yi.cfg.holddly > YAM_MAXHOLDDLY)
- return -EINVAL;
- yp->holdd = yi.cfg.holddly;
- }
- if (yi.cfg.mask & YAM_TXDELAY) {
- if (yi.cfg.txdelay > YAM_MAXTXDELAY)
- return -EINVAL;
- yp->txd = yi.cfg.txdelay;
- }
- if (yi.cfg.mask & YAM_TXTAIL) {
- if (yi.cfg.txtail > YAM_MAXTXTAIL)
- return -EINVAL;
- yp->txtail = yi.cfg.txtail;
- }
- if (yi.cfg.mask & YAM_PERSIST) {
- if (yi.cfg.persist > YAM_MAXPERSIST)
- return -EINVAL;
- yp->pers = yi.cfg.persist;
- }
- if (yi.cfg.mask & YAM_SLOTTIME) {
- if (yi.cfg.slottime > YAM_MAXSLOTTIME)
- return -EINVAL;
- yp->slot = yi.cfg.slottime;
- yp->slotcnt = yp->slot / 10;
- }
- break;
-
- case SIOCYAMGCFG:
- memset(&yi, 0, sizeof(yi));
- yi.cfg.mask = 0xffffffff;
- yi.cfg.iobase = yp->iobase;
- yi.cfg.irq = yp->irq;
- yi.cfg.bitrate = yp->bitrate;
- yi.cfg.baudrate = yp->baudrate;
- yi.cfg.mode = yp->dupmode;
- yi.cfg.txdelay = yp->txd;
- yi.cfg.holddly = yp->holdd;
- yi.cfg.txtail = yp->txtail;
- yi.cfg.persist = yp->pers;
- yi.cfg.slottime = yp->slot;
- if (copy_to_user(data, &yi, sizeof(struct yamdrv_ioctl_cfg)))
- return -EFAULT;
- break;
-
- default:
- return -EINVAL;
-
- }
-
- return 0;
-}
-
-/* --------------------------------------------------------------------- */
-
-static int yam_set_mac_address(struct net_device *dev, void *addr)
-{
- struct sockaddr *sa = (struct sockaddr *) addr;
-
- /* addr is an AX.25 shifted ASCII mac address */
- dev_addr_set(dev, sa->sa_data);
- return 0;
-}
-
-/* --------------------------------------------------------------------- */
-
-static const struct net_device_ops yam_netdev_ops = {
- .ndo_open = yam_open,
- .ndo_stop = yam_close,
- .ndo_start_xmit = yam_send_packet,
- .ndo_siocdevprivate = yam_siocdevprivate,
- .ndo_set_mac_address = yam_set_mac_address,
-};
-
-static void yam_setup(struct net_device *dev)
-{
- struct yam_port *yp = netdev_priv(dev);
-
- yp->magic = YAM_MAGIC;
- yp->bitrate = DEFAULT_BITRATE;
- yp->baudrate = DEFAULT_BITRATE * 2;
- yp->iobase = 0;
- yp->irq = 0;
- yp->dupmode = 0;
- yp->holdd = DEFAULT_HOLDD;
- yp->txd = DEFAULT_TXD;
- yp->txtail = DEFAULT_TXTAIL;
- yp->slot = DEFAULT_SLOT;
- yp->pers = DEFAULT_PERS;
- yp->dev = dev;
-
- dev->base_addr = yp->iobase;
- dev->irq = yp->irq;
-
- skb_queue_head_init(&yp->send_queue);
-
- dev->netdev_ops = &yam_netdev_ops;
- dev->header_ops = &ax25_header_ops;
-
- dev->type = ARPHRD_AX25;
- dev->hard_header_len = AX25_MAX_HEADER_LEN;
- dev->mtu = AX25_MTU;
- dev->addr_len = AX25_ADDR_LEN;
- memcpy(dev->broadcast, &ax25_bcast, AX25_ADDR_LEN);
- dev_addr_set(dev, (u8 *)&ax25_defaddr);
-}
-
-static int __init yam_init_driver(void)
-{
- struct net_device *dev;
- int i, err;
- char name[IFNAMSIZ];
-
- printk(yam_drvinfo);
-
- for (i = 0; i < NR_PORTS; i++) {
- sprintf(name, "yam%d", i);
-
- dev = alloc_netdev(sizeof(struct yam_port), name,
- NET_NAME_UNKNOWN, yam_setup);
- if (!dev) {
- pr_err("yam: cannot allocate net device\n");
- err = -ENOMEM;
- goto error;
- }
-
- err = register_netdev(dev);
- if (err) {
- printk(KERN_WARNING "yam: cannot register net device %s\n", dev->name);
- free_netdev(dev);
- goto error;
- }
- yam_devs[i] = dev;
-
- }
-
- timer_setup(&yam_timer, yam_dotimer, 0);
- yam_timer.expires = jiffies + HZ / 100;
- add_timer(&yam_timer);
-
- proc_create_seq("yam", 0444, init_net.proc_net, &yam_seqops);
- return 0;
- error:
- while (--i >= 0) {
- unregister_netdev(yam_devs[i]);
- free_netdev(yam_devs[i]);
- }
- return err;
-}
-
-/* --------------------------------------------------------------------- */
-
-static void __exit yam_cleanup_driver(void)
-{
- struct yam_mcs *p;
- int i;
-
- timer_delete_sync(&yam_timer);
- for (i = 0; i < NR_PORTS; i++) {
- struct net_device *dev = yam_devs[i];
- if (dev) {
- unregister_netdev(dev);
- free_netdev(dev);
- }
- }
-
- while (yam_data) {
- p = yam_data;
- yam_data = yam_data->next;
- kfree(p);
- }
-
- remove_proc_entry("yam", init_net.proc_net);
-}
-
-/* --------------------------------------------------------------------- */
-
-MODULE_AUTHOR("Frederic Rible F1OAT frible@teaser.fr");
-MODULE_DESCRIPTION("Yam amateur radio modem driver");
-MODULE_LICENSE("GPL");
-MODULE_FIRMWARE(FIRMWARE_1200);
-MODULE_FIRMWARE(FIRMWARE_9600);
-
-module_init(yam_init_driver);
-module_exit(yam_cleanup_driver);
-
-/* --------------------------------------------------------------------- */
-
+++ /dev/null
-/* SPDX-License-Identifier: GPL-2.0 */
-
-/* 8530 Serial Communications Controller Register definitions */
-#define FLAG 0x7e
-
-/* Write Register 0 */
-#define R0 0 /* Register selects */
-#define R1 1
-#define R2 2
-#define R3 3
-#define R4 4
-#define R5 5
-#define R6 6
-#define R7 7
-#define R8 8
-#define R9 9
-#define R10 10
-#define R11 11
-#define R12 12
-#define R13 13
-#define R14 14
-#define R15 15
-
-#define NULLCODE 0 /* Null Code */
-#define POINT_HIGH 0x8 /* Select upper half of registers */
-#define RES_EXT_INT 0x10 /* Reset Ext. Status Interrupts */
-#define SEND_ABORT 0x18 /* HDLC Abort */
-#define RES_RxINT_FC 0x20 /* Reset RxINT on First Character */
-#define RES_Tx_P 0x28 /* Reset TxINT Pending */
-#define ERR_RES 0x30 /* Error Reset */
-#define RES_H_IUS 0x38 /* Reset highest IUS */
-
-#define RES_Rx_CRC 0x40 /* Reset Rx CRC Checker */
-#define RES_Tx_CRC 0x80 /* Reset Tx CRC Checker */
-#define RES_EOM_L 0xC0 /* Reset EOM latch */
-
-/* Write Register 1 */
-
-#define EXT_INT_ENAB 0x1 /* Ext Int Enable */
-#define TxINT_ENAB 0x2 /* Tx Int Enable */
-#define PAR_SPEC 0x4 /* Parity is special condition */
-
-#define RxINT_DISAB 0 /* Rx Int Disable */
-#define RxINT_FCERR 0x8 /* Rx Int on First Character Only or Error */
-#define INT_ALL_Rx 0x10 /* Int on all Rx Characters or error */
-#define INT_ERR_Rx 0x18 /* Int on error only */
-
-#define WT_RDY_RT 0x20 /* Wait/Ready on R/T */
-#define WT_FN_RDYFN 0x40 /* Wait/FN/Ready FN */
-#define WT_RDY_ENAB 0x80 /* Wait/Ready Enable */
-
-/* Write Register #2 (Interrupt Vector) */
-
-/* Write Register 3 */
-
-#define RxENABLE 0x1 /* Rx Enable */
-#define SYNC_L_INH 0x2 /* Sync Character Load Inhibit */
-#define ADD_SM 0x4 /* Address Search Mode (SDLC) */
-#define RxCRC_ENAB 0x8 /* Rx CRC Enable */
-#define ENT_HM 0x10 /* Enter Hunt Mode */
-#define AUTO_ENAB 0x20 /* Auto Enables */
-#define Rx5 0x0 /* Rx 5 Bits/Character */
-#define Rx7 0x40 /* Rx 7 Bits/Character */
-#define Rx6 0x80 /* Rx 6 Bits/Character */
-#define Rx8 0xc0 /* Rx 8 Bits/Character */
-
-/* Write Register 4 */
-
-#define PAR_ENA 0x1 /* Parity Enable */
-#define PAR_EVEN 0x2 /* Parity Even/Odd* */
-
-#define SYNC_ENAB 0 /* Sync Modes Enable */
-#define SB1 0x4 /* 1 stop bit/char */
-#define SB15 0x8 /* 1.5 stop bits/char */
-#define SB2 0xc /* 2 stop bits/char */
-
-#define MONSYNC 0 /* 8 Bit Sync character */
-#define BISYNC 0x10 /* 16 bit sync character */
-#define SDLC 0x20 /* SDLC Mode (01111110 Sync Flag) */
-#define EXTSYNC 0x30 /* External Sync Mode */
-
-#define X1CLK 0x0 /* x1 clock mode */
-#define X16CLK 0x40 /* x16 clock mode */
-#define X32CLK 0x80 /* x32 clock mode */
-#define X64CLK 0xC0 /* x64 clock mode */
-
-/* Write Register 5 */
-
-#define TxCRC_ENAB 0x1 /* Tx CRC Enable */
-#define RTS 0x2 /* RTS */
-#define SDLC_CRC 0x4 /* SDLC/CRC-16 */
-#define TxENAB 0x8 /* Tx Enable */
-#define SND_BRK 0x10 /* Send Break */
-#define Tx5 0x0 /* Tx 5 bits (or less)/character */
-#define Tx7 0x20 /* Tx 7 bits/character */
-#define Tx6 0x40 /* Tx 6 bits/character */
-#define Tx8 0x60 /* Tx 8 bits/character */
-#define DTR 0x80 /* DTR */
-
-/* Write Register 6 (Sync bits 0-7/SDLC Address Field) */
-
-/* Write Register 7 (Sync bits 8-15/SDLC 01111110) */
-
-/* Write Register 8 (transmit buffer) */
-
-/* Write Register 9 (Master interrupt control) */
-#define VIS 1 /* Vector Includes Status */
-#define NV 2 /* No Vector */
-#define DLC 4 /* Disable Lower Chain */
-#define MIE 8 /* Master Interrupt Enable */
-#define STATHI 0x10 /* Status high */
-#define NORESET 0 /* No reset on write to R9 */
-#define CHRB 0x40 /* Reset channel B */
-#define CHRA 0x80 /* Reset channel A */
-#define FHWRES 0xc0 /* Force hardware reset */
-
-/* Write Register 10 (misc control bits) */
-#define BIT6 1 /* 6 bit/8bit sync */
-#define LOOPMODE 2 /* SDLC Loop mode */
-#define ABUNDER 4 /* Abort/flag on SDLC xmit underrun */
-#define MARKIDLE 8 /* Mark/flag on idle */
-#define GAOP 0x10 /* Go active on poll */
-#define NRZ 0 /* NRZ mode */
-#define NRZI 0x20 /* NRZI mode */
-#define FM1 0x40 /* FM1 (transition = 1) */
-#define FM0 0x60 /* FM0 (transition = 0) */
-#define CRCPS 0x80 /* CRC Preset I/O */
-
-/* Write Register 11 (Clock Mode control) */
-#define TRxCXT 0 /* TRxC = Xtal output */
-#define TRxCTC 1 /* TRxC = Transmit clock */
-#define TRxCBR 2 /* TRxC = BR Generator Output */
-#define TRxCDP 3 /* TRxC = DPLL output */
-#define TRxCOI 4 /* TRxC O/I */
-#define TCRTxCP 0 /* Transmit clock = RTxC pin */
-#define TCTRxCP 8 /* Transmit clock = TRxC pin */
-#define TCBR 0x10 /* Transmit clock = BR Generator output */
-#define TCDPLL 0x18 /* Transmit clock = DPLL output */
-#define RCRTxCP 0 /* Receive clock = RTxC pin */
-#define RCTRxCP 0x20 /* Receive clock = TRxC pin */
-#define RCBR 0x40 /* Receive clock = BR Generator output */
-#define RCDPLL 0x60 /* Receive clock = DPLL output */
-#define RTxCX 0x80 /* RTxC Xtal/No Xtal */
-
-/* Write Register 12 (lower byte of baud rate generator time constant) */
-
-/* Write Register 13 (upper byte of baud rate generator time constant) */
-
-/* Write Register 14 (Misc control bits) */
-#define BRENABL 1 /* Baud rate generator enable */
-#define BRSRC 2 /* Baud rate generator source */
-#define DTRREQ 4 /* DTR/Request function */
-#define AUTOECHO 8 /* Auto Echo */
-#define LOOPBAK 0x10 /* Local loopback */
-#define SEARCH 0x20 /* Enter search mode */
-#define RMC 0x40 /* Reset missing clock */
-#define DISDPLL 0x60 /* Disable DPLL */
-#define SSBR 0x80 /* Set DPLL source = BR generator */
-#define SSRTxC 0xa0 /* Set DPLL source = RTxC */
-#define SFMM 0xc0 /* Set FM mode */
-#define SNRZI 0xe0 /* Set NRZI mode */
-
-/* Write Register 15 (external/status interrupt control) */
-#define ZCIE 2 /* Zero count IE */
-#define DCDIE 8 /* DCD IE */
-#define SYNCIE 0x10 /* Sync/hunt IE */
-#define CTSIE 0x20 /* CTS IE */
-#define TxUIE 0x40 /* Tx Underrun/EOM IE */
-#define BRKIE 0x80 /* Break/Abort IE */
-
-
-/* Read Register 0 */
-#define Rx_CH_AV 0x1 /* Rx Character Available */
-#define ZCOUNT 0x2 /* Zero count */
-#define Tx_BUF_EMP 0x4 /* Tx Buffer empty */
-#define DCD 0x8 /* DCD */
-#define SYNC_HUNT 0x10 /* Sync/hunt */
-#define CTS 0x20 /* CTS */
-#define TxEOM 0x40 /* Tx underrun */
-#define BRK_ABRT 0x80 /* Break/Abort */
-
-/* Read Register 1 */
-#define ALL_SNT 0x1 /* All sent */
-/* Residue Data for 8 Rx bits/char programmed */
-#define RES3 0x8 /* 0/3 */
-#define RES4 0x4 /* 0/4 */
-#define RES5 0xc /* 0/5 */
-#define RES6 0x2 /* 0/6 */
-#define RES7 0xa /* 0/7 */
-#define RES8 0x6 /* 0/8 */
-#define RES18 0xe /* 1/8 */
-#define RES28 0x0 /* 2/8 */
-/* Special Rx Condition Interrupts */
-#define PAR_ERR 0x10 /* Parity error */
-#define Rx_OVR 0x20 /* Rx Overrun Error */
-#define CRC_ERR 0x40 /* CRC/Framing Error */
-#define END_FR 0x80 /* End of Frame (SDLC) */
-
-/* Read Register 2 (channel b only) - Interrupt vector */
-
-/* Read Register 3 (interrupt pending register) ch a only */
-#define CHBEXT 0x1 /* Channel B Ext/Stat IP */
-#define CHBTxIP 0x2 /* Channel B Tx IP */
-#define CHBRxIP 0x4 /* Channel B Rx IP */
-#define CHAEXT 0x8 /* Channel A Ext/Stat IP */
-#define CHATxIP 0x10 /* Channel A Tx IP */
-#define CHARxIP 0x20 /* Channel A Rx IP */
-
-/* Read Register 8 (receive data register) */
-
-/* Read Register 10 (misc status bits) */
-#define ONLOOP 2 /* On loop */
-#define LOOPSEND 0x10 /* Loop sending */
-#define CLK2MIS 0x40 /* Two clocks missing */
-#define CLK1MIS 0x80 /* One clock missing */
-
-/* Read Register 12 (lower byte of baud rate generator constant) */
-
-/* Read Register 13 (upper byte of baud rate generator constant) */
-
-/* Read Register 15 (value of WR 15) */
-
-/* Z85C30/Z85230 Enhanced SCC register definitions */
-
-/* Write Register 7' (SDLC/HDLC Programmable Enhancements) */
-#define AUTOTXF 0x01 /* Auto Tx Flag */
-#define AUTOEOM 0x02 /* Auto EOM Latch Reset */
-#define AUTORTS 0x04 /* Auto RTS */
-#define TXDNRZI 0x08 /* TxD Pulled High in SDLC NRZI mode */
-#define RXFIFOH 0x08 /* Z85230: Int on RX FIFO half full */
-#define FASTDTR 0x10 /* Fast DTR/REQ Mode */
-#define CRCCBCR 0x20 /* CRC Check Bytes Completely Received */
-#define TXFIFOE 0x20 /* Z85230: Int on TX FIFO completely empty */
-#define EXTRDEN 0x40 /* Extended Read Enabled */
-
-/* Write Register 15 (external/status interrupt control) */
-#define SHDLCE 1 /* SDLC/HDLC Enhancements Enable */
-#define FIFOE 4 /* FIFO Enable */
-
-/* Read Register 6 (frame status FIFO) */
-#define BCLSB 0xff /* LSB of 14 bits count */
-
-/* Read Register 7 (frame status FIFO) */
-#define BCMSB 0x3f /* MSB of 14 bits count */
-#define FDA 0x40 /* FIFO Data Available Status */
-#define FOS 0x80 /* FIFO Overflow Status */
+++ /dev/null
-/* SPDX-License-Identifier: GPL-2.0 */
-/*
- * hdlcdrv.h -- HDLC packet radio network driver.
- * The Linux soundcard driver for 1200 baud and 9600 baud packet radio
- * (C) 1996-1998 by Thomas Sailer, HB9JNX/AE4WA
- */
-#ifndef _HDLCDRV_H
-#define _HDLCDRV_H
-
-
-#include <linux/netdevice.h>
-#include <linux/if.h>
-#include <linux/spinlock.h>
-#include <uapi/linux/hdlcdrv.h>
-
-#define HDLCDRV_MAGIC 0x5ac6e778
-#define HDLCDRV_HDLCBUFFER 32 /* should be a power of 2 for speed reasons */
-#define HDLCDRV_BITBUFFER 256 /* should be a power of 2 for speed reasons */
-#undef HDLCDRV_LOOPBACK /* define for HDLC debugging purposes */
-#define HDLCDRV_DEBUG
-
-/* maximum packet length, excluding CRC */
-#define HDLCDRV_MAXFLEN 400
-
-
-struct hdlcdrv_hdlcbuffer {
- spinlock_t lock;
- unsigned rd, wr;
- unsigned short buf[HDLCDRV_HDLCBUFFER];
-};
-
-#ifdef HDLCDRV_DEBUG
-struct hdlcdrv_bitbuffer {
- unsigned int rd;
- unsigned int wr;
- unsigned int shreg;
- unsigned char buffer[HDLCDRV_BITBUFFER];
-};
-
-static inline void hdlcdrv_add_bitbuffer(struct hdlcdrv_bitbuffer *buf,
- unsigned int bit)
-{
- unsigned char new;
-
- new = buf->shreg & 1;
- buf->shreg >>= 1;
- buf->shreg |= (!!bit) << 7;
- if (new) {
- buf->buffer[buf->wr] = buf->shreg;
- buf->wr = (buf->wr+1) % sizeof(buf->buffer);
- buf->shreg = 0x80;
- }
-}
-
-static inline void hdlcdrv_add_bitbuffer_word(struct hdlcdrv_bitbuffer *buf,
- unsigned int bits)
-{
- buf->buffer[buf->wr] = bits & 0xff;
- buf->wr = (buf->wr+1) % sizeof(buf->buffer);
- buf->buffer[buf->wr] = (bits >> 8) & 0xff;
- buf->wr = (buf->wr+1) % sizeof(buf->buffer);
-
-}
-#endif /* HDLCDRV_DEBUG */
-
-/* -------------------------------------------------------------------- */
-/*
- * Information that need to be kept for each driver.
- */
-
-struct hdlcdrv_ops {
- /*
- * first some informations needed by the hdlcdrv routines
- */
- const char *drvname;
- const char *drvinfo;
- /*
- * the routines called by the hdlcdrv routines
- */
- int (*open)(struct net_device *);
- int (*close)(struct net_device *);
- int (*ioctl)(struct net_device *, void __user *,
- struct hdlcdrv_ioctl *, int);
-};
-
-struct hdlcdrv_state {
- int magic;
- int opened;
-
- const struct hdlcdrv_ops *ops;
-
- struct {
- int bitrate;
- } par;
-
- struct hdlcdrv_pttoutput {
- int dma2;
- int seriobase;
- int pariobase;
- int midiiobase;
- unsigned int flags;
- } ptt_out;
-
- struct hdlcdrv_channel_params ch_params;
-
- struct hdlcdrv_hdlcrx {
- struct hdlcdrv_hdlcbuffer hbuf;
- unsigned long in_hdlc_rx;
- /* 0 = sync hunt, != 0 receiving */
- int rx_state;
- unsigned int bitstream;
- unsigned int bitbuf;
- int numbits;
- unsigned char dcd;
-
- int len;
- unsigned char *bp;
- unsigned char buffer[HDLCDRV_MAXFLEN+2];
- } hdlcrx;
-
- struct hdlcdrv_hdlctx {
- struct hdlcdrv_hdlcbuffer hbuf;
- unsigned long in_hdlc_tx;
- /*
- * 0 = send flags
- * 1 = send txtail (flags)
- * 2 = send packet
- */
- int tx_state;
- int numflags;
- unsigned int bitstream;
- unsigned char ptt;
- int calibrate;
- int slotcnt;
-
- unsigned int bitbuf;
- int numbits;
-
- int len;
- unsigned char *bp;
- unsigned char buffer[HDLCDRV_MAXFLEN+2];
- } hdlctx;
-
-#ifdef HDLCDRV_DEBUG
- struct hdlcdrv_bitbuffer bitbuf_channel;
- struct hdlcdrv_bitbuffer bitbuf_hdlc;
-#endif /* HDLCDRV_DEBUG */
-
- int ptt_keyed;
-
- /* queued skb for transmission */
- struct sk_buff *skb;
-};
-
-
-/* -------------------------------------------------------------------- */
-
-static inline int hdlcdrv_hbuf_full(struct hdlcdrv_hdlcbuffer *hb)
-{
- unsigned long flags;
- int ret;
-
- spin_lock_irqsave(&hb->lock, flags);
- ret = !((HDLCDRV_HDLCBUFFER - 1 + hb->rd - hb->wr) % HDLCDRV_HDLCBUFFER);
- spin_unlock_irqrestore(&hb->lock, flags);
- return ret;
-}
-
-/* -------------------------------------------------------------------- */
-
-static inline int hdlcdrv_hbuf_empty(struct hdlcdrv_hdlcbuffer *hb)
-{
- unsigned long flags;
- int ret;
-
- spin_lock_irqsave(&hb->lock, flags);
- ret = (hb->rd == hb->wr);
- spin_unlock_irqrestore(&hb->lock, flags);
- return ret;
-}
-
-/* -------------------------------------------------------------------- */
-
-static inline unsigned short hdlcdrv_hbuf_get(struct hdlcdrv_hdlcbuffer *hb)
-{
- unsigned long flags;
- unsigned short val;
- unsigned newr;
-
- spin_lock_irqsave(&hb->lock, flags);
- if (hb->rd == hb->wr)
- val = 0;
- else {
- newr = (hb->rd+1) % HDLCDRV_HDLCBUFFER;
- val = hb->buf[hb->rd];
- hb->rd = newr;
- }
- spin_unlock_irqrestore(&hb->lock, flags);
- return val;
-}
-
-/* -------------------------------------------------------------------- */
-
-static inline void hdlcdrv_hbuf_put(struct hdlcdrv_hdlcbuffer *hb,
- unsigned short val)
-{
- unsigned newp;
- unsigned long flags;
-
- spin_lock_irqsave(&hb->lock, flags);
- newp = (hb->wr+1) % HDLCDRV_HDLCBUFFER;
- if (newp != hb->rd) {
- hb->buf[hb->wr] = val & 0xffff;
- hb->wr = newp;
- }
- spin_unlock_irqrestore(&hb->lock, flags);
-}
-
-/* -------------------------------------------------------------------- */
-
-static inline void hdlcdrv_putbits(struct hdlcdrv_state *s, unsigned int bits)
-{
- hdlcdrv_hbuf_put(&s->hdlcrx.hbuf, bits);
-}
-
-static inline unsigned int hdlcdrv_getbits(struct hdlcdrv_state *s)
-{
- unsigned int ret;
-
- if (hdlcdrv_hbuf_empty(&s->hdlctx.hbuf)) {
- if (s->hdlctx.calibrate > 0)
- s->hdlctx.calibrate--;
- else
- s->hdlctx.ptt = 0;
- ret = 0;
- } else
- ret = hdlcdrv_hbuf_get(&s->hdlctx.hbuf);
-#ifdef HDLCDRV_LOOPBACK
- hdlcdrv_hbuf_put(&s->hdlcrx.hbuf, ret);
-#endif /* HDLCDRV_LOOPBACK */
- return ret;
-}
-
-static inline void hdlcdrv_channelbit(struct hdlcdrv_state *s, unsigned int bit)
-{
-#ifdef HDLCDRV_DEBUG
- hdlcdrv_add_bitbuffer(&s->bitbuf_channel, bit);
-#endif /* HDLCDRV_DEBUG */
-}
-
-static inline void hdlcdrv_setdcd(struct hdlcdrv_state *s, int dcd)
-{
- s->hdlcrx.dcd = !!dcd;
-}
-
-static inline int hdlcdrv_ptt(struct hdlcdrv_state *s)
-{
- return s->hdlctx.ptt || (s->hdlctx.calibrate > 0);
-}
-
-/* -------------------------------------------------------------------- */
-
-void hdlcdrv_receiver(struct net_device *, struct hdlcdrv_state *);
-void hdlcdrv_transmitter(struct net_device *, struct hdlcdrv_state *);
-void hdlcdrv_arbitrate(struct net_device *, struct hdlcdrv_state *);
-struct net_device *hdlcdrv_register(const struct hdlcdrv_ops *ops,
- unsigned int privsize, const char *ifname,
- unsigned int baseaddr, unsigned int irq,
- unsigned int dma);
-void hdlcdrv_unregister(struct net_device *dev);
-
-/* -------------------------------------------------------------------- */
-
-
-
-#endif /* _HDLCDRV_H */
#if defined(CONFIG_HYPERV_NET)
# define LL_MAX_HEADER 128
-#elif defined(CONFIG_WLAN) || IS_ENABLED(CONFIG_AX25)
+#elif defined(CONFIG_WLAN)
# if defined(CONFIG_MAC80211_MESH)
# define LL_MAX_HEADER 128
# else
#if IS_ENABLED(CONFIG_ATALK)
void *atalk_ptr;
#endif
-#if IS_ENABLED(CONFIG_AX25)
- struct ax25_dev __rcu *ax25_ptr;
-#endif
#if IS_ENABLED(CONFIG_CFG80211)
struct wireless_dev *ieee80211_ptr;
#endif
+++ /dev/null
-/* SPDX-License-Identifier: GPL-2.0 */
-/* $Id: scc.h,v 1.29 1997/04/02 14:56:45 jreuter Exp jreuter $ */
-#ifndef _SCC_H
-#define _SCC_H
-
-#include <uapi/linux/scc.h>
-
-
-enum {TX_OFF, TX_ON}; /* command for scc_key_trx() */
-
-/* Vector masks in RR2B */
-
-#define VECTOR_MASK 0x06
-#define TXINT 0x00
-#define EXINT 0x02
-#define RXINT 0x04
-#define SPINT 0x06
-
-#ifdef CONFIG_SCC_DELAY
-#define Inb(port) inb_p(port)
-#define Outb(port, val) outb_p(val, port)
-#else
-#define Inb(port) inb(port)
-#define Outb(port, val) outb(val, port)
-#endif
-
-/* SCC channel control structure for KISS */
-
-struct scc_kiss {
- unsigned char txdelay; /* Transmit Delay 10 ms/cnt */
- unsigned char persist; /* Persistence (0-255) as a % */
- unsigned char slottime; /* Delay to wait on persistence hit */
- unsigned char tailtime; /* Delay after last byte written */
- unsigned char fulldup; /* Full Duplex mode 0=CSMA 1=DUP 2=ALWAYS KEYED */
- unsigned char waittime; /* Waittime before any transmit attempt */
- unsigned int maxkeyup; /* Maximum time to transmit (seconds) */
- unsigned int mintime; /* Minimal offtime after MAXKEYUP timeout (seconds) */
- unsigned int idletime; /* Maximum idle time in ALWAYS KEYED mode (seconds) */
- unsigned int maxdefer; /* Timer for CSMA channel busy limit */
- unsigned char tx_inhibit; /* Transmit is not allowed when set */
- unsigned char group; /* Group ID for AX.25 TX interlocking */
- unsigned char mode; /* 'normal' or 'hwctrl' mode (unused) */
- unsigned char softdcd; /* Use DPLL instead of DCD pin for carrier detect */
-};
-
-
-/* SCC channel structure */
-
-struct scc_channel {
- int init; /* channel exists? */
-
- struct net_device *dev; /* link to device control structure */
- struct net_device_stats dev_stat;/* device statistics */
-
- char brand; /* manufacturer of the board */
- long clock; /* used clock */
-
- io_port ctrl; /* I/O address of CONTROL register */
- io_port data; /* I/O address of DATA register */
- io_port special; /* I/O address of special function port */
- int irq; /* Number of Interrupt */
-
- char option;
- char enhanced; /* Enhanced SCC support */
-
- unsigned char wreg[16]; /* Copy of last written value in WRx */
- unsigned char status; /* Copy of R0 at last external interrupt */
- unsigned char dcd; /* DCD status */
-
- struct scc_kiss kiss; /* control structure for KISS params */
- struct scc_stat stat; /* statistical information */
- struct scc_modem modem; /* modem information */
-
- struct sk_buff_head tx_queue; /* next tx buffer */
- struct sk_buff *rx_buff; /* pointer to frame currently received */
- struct sk_buff *tx_buff; /* pointer to frame currently transmitted */
-
- /* Timer */
- struct timer_list tx_t; /* tx timer for this channel */
- struct timer_list tx_wdog; /* tx watchdogs */
-
- /* Channel lock */
- spinlock_t lock; /* Channel guard lock */
-};
-
-#endif /* defined(_SCC_H) */
+++ /dev/null
-/* SPDX-License-Identifier: GPL-2.0-or-later */
-/*****************************************************************************/
-
-/*
- * yam.h -- YAM radio modem driver.
- *
- * Copyright (C) 1998 Frederic Rible F1OAT (frible@teaser.fr)
- * Adapted from baycom.c driver written by Thomas Sailer (sailer@ife.ee.ethz.ch)
- *
- * Please note that the GPL allows you to use the driver, NOT the radio.
- * In order to use the radio, you need a license from the communications
- * authority of your country.
- */
-
-/*****************************************************************************/
-
-#define SIOCYAMRESERVED (0)
-#define SIOCYAMSCFG (1) /* Set configuration */
-#define SIOCYAMGCFG (2) /* Get configuration */
-#define SIOCYAMSMCS (3) /* Set mcs data */
-
-#define YAM_IOBASE (1 << 0)
-#define YAM_IRQ (1 << 1)
-#define YAM_BITRATE (1 << 2) /* Bit rate of radio port ->57600 */
-#define YAM_MODE (1 << 3) /* 0=simplex 1=duplex 2=duplex+tempo */
-#define YAM_HOLDDLY (1 << 4) /* duplex tempo (sec) */
-#define YAM_TXDELAY (1 << 5) /* Tx Delay (ms) */
-#define YAM_TXTAIL (1 << 6) /* Tx Tail (ms) */
-#define YAM_PERSIST (1 << 7) /* Persist (ms) */
-#define YAM_SLOTTIME (1 << 8) /* Slottime (ms) */
-#define YAM_BAUDRATE (1 << 9) /* Baud rate of rs232 port ->115200 */
-
-#define YAM_MAXBITRATE 57600
-#define YAM_MAXBAUDRATE 115200
-#define YAM_MAXMODE 2
-#define YAM_MAXHOLDDLY 99
-#define YAM_MAXTXDELAY 999
-#define YAM_MAXTXTAIL 999
-#define YAM_MAXPERSIST 255
-#define YAM_MAXSLOTTIME 999
-
-#define YAM_FPGA_SIZE 5302
-
-struct yamcfg {
- unsigned int mask; /* Mask of commands */
- unsigned int iobase; /* IO Base of COM port */
- unsigned int irq; /* IRQ of COM port */
- unsigned int bitrate; /* Bit rate of radio port */
- unsigned int baudrate; /* Baud rate of the RS232 port */
- unsigned int txdelay; /* TxDelay */
- unsigned int txtail; /* TxTail */
- unsigned int persist; /* Persistence */
- unsigned int slottime; /* Slottime */
- unsigned int mode; /* mode 0 (simp), 1(Dupl), 2(Dupl+delay) */
- unsigned int holddly; /* PTT delay in FullDuplex 2 mode */
-};
-
-struct yamdrv_ioctl_cfg {
- int cmd;
- struct yamcfg cfg;
-};
-
-struct yamdrv_ioctl_mcs {
- int cmd;
- unsigned int bitrate;
- unsigned char bits[YAM_FPGA_SIZE];
-};
/* SPDX-License-Identifier: GPL-2.0 */
-/*
- * Declarations of AX.25 type objects.
- *
- * Alan Cox (GW4PTS) 10/11/93
- */
#ifndef _AX25_H
-#define _AX25_H
+#define _AX25_H
#include <linux/ax25.h>
-#include <linux/spinlock.h>
-#include <linux/timer.h>
-#include <linux/list.h>
-#include <linux/slab.h>
-#include <linux/refcount.h>
-#include <net/neighbour.h>
-#include <net/sock.h>
-#include <linux/seq_file.h>
-#define AX25_T1CLAMPLO 1
-#define AX25_T1CLAMPHI (30 * HZ)
-
-#define AX25_BPQ_HEADER_LEN 16
-#define AX25_KISS_HEADER_LEN 1
-
-#define AX25_HEADER_LEN 17
-#define AX25_ADDR_LEN 7
-#define AX25_DIGI_HEADER_LEN (AX25_MAX_DIGIS * AX25_ADDR_LEN)
-#define AX25_MAX_HEADER_LEN (AX25_HEADER_LEN + AX25_DIGI_HEADER_LEN)
-
-/* AX.25 Protocol IDs */
-#define AX25_P_ROSE 0x01
-#define AX25_P_VJCOMP 0x06 /* Compressed TCP/IP packet */
- /* Van Jacobsen (RFC 1144) */
-#define AX25_P_VJUNCOMP 0x07 /* Uncompressed TCP/IP packet */
- /* Van Jacobsen (RFC 1144) */
-#define AX25_P_SEGMENT 0x08 /* Segmentation fragment */
-#define AX25_P_TEXNET 0xc3 /* TEXTNET datagram protocol */
-#define AX25_P_LQ 0xc4 /* Link Quality Protocol */
-#define AX25_P_ATALK 0xca /* Appletalk */
-#define AX25_P_ATALK_ARP 0xcb /* Appletalk ARP */
-#define AX25_P_IP 0xcc /* ARPA Internet Protocol */
-#define AX25_P_ARP 0xcd /* ARPA Address Resolution */
-#define AX25_P_FLEXNET 0xce /* FlexNet */
-#define AX25_P_NETROM 0xcf /* NET/ROM */
-#define AX25_P_TEXT 0xF0 /* No layer 3 protocol impl. */
-
-/* AX.25 Segment control values */
-#define AX25_SEG_REM 0x7F
-#define AX25_SEG_FIRST 0x80
-
-#define AX25_CBIT 0x80 /* Command/Response bit */
-#define AX25_EBIT 0x01 /* HDLC Address Extension bit */
-#define AX25_HBIT 0x80 /* Has been repeated bit */
-
-#define AX25_SSSID_SPARE 0x60 /* Unused bits in SSID for standard AX.25 */
-#define AX25_ESSID_SPARE 0x20 /* Unused bits in SSID for extended AX.25 */
-#define AX25_DAMA_FLAG 0x20 /* Well, it is *NOT* unused! (dl1bke 951121 */
-
-#define AX25_COND_ACK_PENDING 0x01
-#define AX25_COND_REJECT 0x02
-#define AX25_COND_PEER_RX_BUSY 0x04
-#define AX25_COND_OWN_RX_BUSY 0x08
-#define AX25_COND_DAMA_MODE 0x10
-
-#ifndef _LINUX_NETDEVICE_H
-#include <linux/netdevice.h>
-#endif
-
-/* Upper sub-layer (LAPB) definitions */
-
-/* Control field templates */
-#define AX25_I 0x00 /* Information frames */
-#define AX25_S 0x01 /* Supervisory frames */
-#define AX25_RR 0x01 /* Receiver ready */
-#define AX25_RNR 0x05 /* Receiver not ready */
-#define AX25_REJ 0x09 /* Reject */
-#define AX25_U 0x03 /* Unnumbered frames */
-#define AX25_SABM 0x2f /* Set Asynchronous Balanced Mode */
-#define AX25_SABME 0x6f /* Set Asynchronous Balanced Mode Extended */
-#define AX25_DISC 0x43 /* Disconnect */
-#define AX25_DM 0x0f /* Disconnected mode */
-#define AX25_UA 0x63 /* Unnumbered acknowledge */
-#define AX25_FRMR 0x87 /* Frame reject */
-#define AX25_UI 0x03 /* Unnumbered information */
-#define AX25_XID 0xaf /* Exchange information */
-#define AX25_TEST 0xe3 /* Test */
-
-#define AX25_PF 0x10 /* Poll/final bit for standard AX.25 */
-#define AX25_EPF 0x01 /* Poll/final bit for extended AX.25 */
-
-#define AX25_ILLEGAL 0x100 /* Impossible to be a real frame type */
-
-#define AX25_POLLOFF 0
-#define AX25_POLLON 1
-
-/* AX25 L2 C-bit */
-#define AX25_COMMAND 1
-#define AX25_RESPONSE 2
-
-/* Define Link State constants. */
-
-enum {
- AX25_STATE_0, /* Listening */
- AX25_STATE_1, /* SABM sent */
- AX25_STATE_2, /* DISC sent */
- AX25_STATE_3, /* Established */
- AX25_STATE_4 /* Recovery */
-};
-
-#define AX25_MODULUS 8 /* Standard AX.25 modulus */
-#define AX25_EMODULUS 128 /* Extended AX.25 modulus */
-
-enum {
- AX25_PROTO_STD_SIMPLEX,
- AX25_PROTO_STD_DUPLEX,
-#ifdef CONFIG_AX25_DAMA_SLAVE
- AX25_PROTO_DAMA_SLAVE,
-#endif
- __AX25_PROTO_MAX,
- AX25_PROTO_MAX = __AX25_PROTO_MAX -1
-};
-
-enum {
- AX25_VALUES_IPDEFMODE, /* 0=DG 1=VC */
- AX25_VALUES_AXDEFMODE, /* 0=Normal 1=Extended Seq Nos */
- AX25_VALUES_BACKOFF, /* 0=None 1=Linear 2=Exponential */
- AX25_VALUES_CONMODE, /* Allow connected modes - 0=No 1=no "PID text" 2=all PIDs */
- AX25_VALUES_WINDOW, /* Default window size for standard AX.25 */
- AX25_VALUES_EWINDOW, /* Default window size for extended AX.25 */
- AX25_VALUES_T1, /* Default T1 timeout value */
- AX25_VALUES_T2, /* Default T2 timeout value */
- AX25_VALUES_T3, /* Default T3 timeout value */
- AX25_VALUES_IDLE, /* Connected mode idle timer */
- AX25_VALUES_N2, /* Default N2 value */
- AX25_VALUES_PACLEN, /* AX.25 MTU */
- AX25_VALUES_PROTOCOL, /* Std AX.25, DAMA Slave */
-#ifdef CONFIG_AX25_DAMA_SLAVE
- AX25_VALUES_DS_TIMEOUT, /* DAMA Slave timeout */
-#endif
- AX25_MAX_VALUES /* THIS MUST REMAIN THE LAST ENTRY OF THIS LIST */
-};
-
-#define AX25_DEF_IPDEFMODE 0 /* Datagram */
-#define AX25_DEF_AXDEFMODE 0 /* Normal */
-#define AX25_DEF_BACKOFF 1 /* Linear backoff */
-#define AX25_DEF_CONMODE 2 /* Connected mode allowed */
-#define AX25_DEF_WINDOW 2 /* Window=2 */
-#define AX25_DEF_EWINDOW 32 /* Module-128 Window=32 */
-#define AX25_DEF_T1 10000 /* T1=10s */
-#define AX25_DEF_T2 3000 /* T2=3s */
-#define AX25_DEF_T3 300000 /* T3=300s */
-#define AX25_DEF_N2 10 /* N2=10 */
-#define AX25_DEF_IDLE 0 /* Idle=None */
-#define AX25_DEF_PACLEN 256 /* Paclen=256 */
-#define AX25_DEF_PROTOCOL AX25_PROTO_STD_SIMPLEX /* Standard AX.25 */
-#define AX25_DEF_DS_TIMEOUT 180000 /* DAMA timeout 3 minutes */
-
-typedef struct ax25_uid_assoc {
- struct hlist_node uid_node;
- refcount_t refcount;
- kuid_t uid;
- ax25_address call;
-} ax25_uid_assoc;
-
-#define ax25_uid_for_each(__ax25, list) \
- hlist_for_each_entry(__ax25, list, uid_node)
-
-#define ax25_uid_hold(ax25) \
- refcount_inc(&((ax25)->refcount))
-
-static inline void ax25_uid_put(ax25_uid_assoc *assoc)
-{
- if (refcount_dec_and_test(&assoc->refcount)) {
- kfree(assoc);
- }
-}
-
-typedef struct {
- ax25_address calls[AX25_MAX_DIGIS];
- unsigned char repeated[AX25_MAX_DIGIS];
- unsigned char ndigi;
- signed char lastrepeat;
-} ax25_digi;
-
-typedef struct ax25_route {
- struct ax25_route *next;
- ax25_address callsign;
- struct net_device *dev;
- ax25_digi *digipeat;
- char ip_mode;
-} ax25_route;
-
-void __ax25_put_route(ax25_route *ax25_rt);
-
-extern rwlock_t ax25_route_lock;
-
-static inline void ax25_route_lock_use(void)
-{
- read_lock(&ax25_route_lock);
-}
-
-static inline void ax25_route_lock_unuse(void)
-{
- read_unlock(&ax25_route_lock);
-}
-
-typedef struct {
- char slave; /* slave_mode? */
- struct timer_list slave_timer; /* timeout timer */
- unsigned short slave_timeout; /* when? */
-} ax25_dama_info;
-
-typedef struct ax25_dev {
- struct list_head list;
-
- struct net_device *dev;
- netdevice_tracker dev_tracker;
-
- struct net_device *forward;
- struct ctl_table_header *sysheader;
- int values[AX25_MAX_VALUES];
-#ifdef CONFIG_AX25_DAMA_SLAVE
- ax25_dama_info dama;
-#endif
- refcount_t refcount;
- bool device_up;
- struct rcu_head rcu;
-} ax25_dev;
-
-typedef struct ax25_cb {
- struct hlist_node ax25_node;
- ax25_address source_addr, dest_addr;
- ax25_digi *digipeat;
- ax25_dev *ax25_dev;
- netdevice_tracker dev_tracker;
- unsigned char iamdigi;
- unsigned char state, modulus, pidincl;
- unsigned short vs, vr, va;
- unsigned char condition, backoff;
- unsigned char n2, n2count;
- struct timer_list t1timer, t2timer, t3timer, idletimer;
- unsigned long t1, t2, t3, idle, rtt;
- unsigned short paclen, fragno, fraglen;
- struct sk_buff_head write_queue;
- struct sk_buff_head reseq_queue;
- struct sk_buff_head ack_queue;
- struct sk_buff_head frag_queue;
- unsigned char window;
- struct timer_list timer, dtimer;
- struct sock *sk; /* Backlink to socket */
- refcount_t refcount;
-} ax25_cb;
-
-struct ax25_sock {
- struct sock sk;
- struct ax25_cb *cb;
-};
-
-#define ax25_sk(ptr) container_of_const(ptr, struct ax25_sock, sk)
-
-static inline struct ax25_cb *sk_to_ax25(const struct sock *sk)
-{
- return ax25_sk(sk)->cb;
-}
-
-#define ax25_for_each(__ax25, list) \
- hlist_for_each_entry(__ax25, list, ax25_node)
-
-#define ax25_cb_hold(__ax25) \
- refcount_inc(&((__ax25)->refcount))
-
-static __inline__ void ax25_cb_put(ax25_cb *ax25)
-{
- if (refcount_dec_and_test(&ax25->refcount)) {
- kfree(ax25->digipeat);
- kfree(ax25);
- }
-}
-
-static inline void ax25_dev_hold(ax25_dev *ax25_dev)
-{
- refcount_inc(&ax25_dev->refcount);
-}
-
-static inline void ax25_dev_put(ax25_dev *ax25_dev)
-{
- if (refcount_dec_and_test(&ax25_dev->refcount))
- kfree_rcu(ax25_dev, rcu);
-}
-static inline __be16 ax25_type_trans(struct sk_buff *skb, struct net_device *dev)
-{
- skb->dev = dev;
- skb_reset_mac_header(skb);
- skb->pkt_type = PACKET_HOST;
- return htons(ETH_P_AX25);
-}
-
-/* af_ax25.c */
-extern struct hlist_head ax25_list;
-extern spinlock_t ax25_list_lock;
-void ax25_cb_add(ax25_cb *);
-struct sock *ax25_find_listener(ax25_address *, int, struct net_device *, int);
-struct sock *ax25_get_socket(ax25_address *, ax25_address *, int);
-ax25_cb *ax25_find_cb(const ax25_address *, ax25_address *, ax25_digi *,
- struct net_device *);
-void ax25_send_to_raw(ax25_address *, struct sk_buff *, int);
-void ax25_destroy_socket(ax25_cb *);
-ax25_cb * __must_check ax25_create_cb(void);
-void ax25_fillin_cb(ax25_cb *, ax25_dev *);
-struct sock *ax25_make_new(struct sock *, struct ax25_dev *);
-
-/* ax25_addr.c */
-extern const ax25_address ax25_bcast;
-extern const ax25_address ax25_defaddr;
-extern const ax25_address null_ax25_address;
-char *ax2asc(char *buf, const ax25_address *);
-void asc2ax(ax25_address *addr, const char *callsign);
-int ax25cmp(const ax25_address *, const ax25_address *);
-int ax25digicmp(const ax25_digi *, const ax25_digi *);
-const unsigned char *ax25_addr_parse(const unsigned char *, int,
- ax25_address *, ax25_address *, ax25_digi *, int *, int *);
-int ax25_addr_build(unsigned char *, const ax25_address *,
- const ax25_address *, const ax25_digi *, int, int);
-int ax25_addr_size(const ax25_digi *);
-void ax25_digi_invert(const ax25_digi *, ax25_digi *);
-
-/* ax25_dev.c */
-extern spinlock_t ax25_dev_lock;
-
-#if IS_ENABLED(CONFIG_AX25)
-static inline ax25_dev *ax25_dev_ax25dev(const struct net_device *dev)
-{
- return rcu_dereference_rtnl(dev->ax25_ptr);
-}
-#endif
-
-ax25_dev *ax25_addr_ax25dev(ax25_address *);
-void ax25_dev_device_up(struct net_device *);
-void ax25_dev_device_down(struct net_device *);
-int ax25_fwd_ioctl(unsigned int, struct ax25_fwd_struct *);
-struct net_device *ax25_fwd_dev(struct net_device *);
-void ax25_dev_free(void);
-
-/* ax25_ds_in.c */
-int ax25_ds_frame_in(ax25_cb *, struct sk_buff *, int);
-
-/* ax25_ds_subr.c */
-void ax25_ds_nr_error_recovery(ax25_cb *);
-void ax25_ds_enquiry_response(ax25_cb *);
-void ax25_ds_establish_data_link(ax25_cb *);
-void ax25_dev_dama_off(ax25_dev *);
-void ax25_dama_on(ax25_cb *);
-void ax25_dama_off(ax25_cb *);
-
-/* ax25_ds_timer.c */
-void ax25_ds_setup_timer(ax25_dev *);
-void ax25_ds_set_timer(ax25_dev *);
-void ax25_ds_del_timer(ax25_dev *);
-void ax25_ds_timer(ax25_cb *);
-void ax25_ds_t1_timeout(ax25_cb *);
-void ax25_ds_heartbeat_expiry(ax25_cb *);
-void ax25_ds_t3timer_expiry(ax25_cb *);
-void ax25_ds_idletimer_expiry(ax25_cb *);
-
-/* ax25_iface.c */
-
-struct ax25_protocol {
- struct ax25_protocol *next;
- unsigned int pid;
- int (*func)(struct sk_buff *, ax25_cb *);
-};
-
-void ax25_register_pid(struct ax25_protocol *ap);
-void ax25_protocol_release(unsigned int);
-
-struct ax25_linkfail {
- struct hlist_node lf_node;
- void (*func)(ax25_cb *, int);
-};
-
-void ax25_linkfail_register(struct ax25_linkfail *lf);
-void ax25_linkfail_release(struct ax25_linkfail *lf);
-int __must_check ax25_listen_register(const ax25_address *,
- struct net_device *);
-void ax25_listen_release(const ax25_address *, struct net_device *);
-int(*ax25_protocol_function(unsigned int))(struct sk_buff *, ax25_cb *);
-int ax25_listen_mine(const ax25_address *, struct net_device *);
-void ax25_link_failed(ax25_cb *, int);
-int ax25_protocol_is_registered(unsigned int);
-
-/* ax25_in.c */
-int ax25_rx_iframe(ax25_cb *, struct sk_buff *);
-int ax25_kiss_rcv(struct sk_buff *, struct net_device *, struct packet_type *,
- struct net_device *);
-
-/* ax25_ip.c */
-netdev_tx_t ax25_ip_xmit(struct sk_buff *skb);
-extern const struct header_ops ax25_header_ops;
-
-/* ax25_out.c */
-ax25_cb *ax25_send_frame(struct sk_buff *, int, const ax25_address *,
- ax25_address *, ax25_digi *, struct net_device *);
-void ax25_output(ax25_cb *, int, struct sk_buff *);
-void ax25_kick(ax25_cb *);
-void ax25_transmit_buffer(ax25_cb *, struct sk_buff *, int);
-void ax25_queue_xmit(struct sk_buff *skb, struct net_device *dev);
-int ax25_check_iframes_acked(ax25_cb *, unsigned short);
-
-/* ax25_route.c */
-void ax25_rt_device_down(struct net_device *);
-int ax25_rt_ioctl(unsigned int, void __user *);
-extern const struct seq_operations ax25_rt_seqops;
-ax25_route *ax25_get_route(ax25_address *addr, struct net_device *dev);
-struct sk_buff *ax25_rt_build_path(struct sk_buff *, ax25_address *,
- ax25_address *, ax25_digi *);
-void ax25_rt_free(void);
-
-/* ax25_std_in.c */
-int ax25_std_frame_in(ax25_cb *, struct sk_buff *, int);
-
-/* ax25_std_subr.c */
-void ax25_std_nr_error_recovery(ax25_cb *);
-void ax25_std_establish_data_link(ax25_cb *);
-void ax25_std_transmit_enquiry(ax25_cb *);
-void ax25_std_enquiry_response(ax25_cb *);
-void ax25_std_timeout_response(ax25_cb *);
-
-/* ax25_std_timer.c */
-void ax25_std_heartbeat_expiry(ax25_cb *);
-void ax25_std_t1timer_expiry(ax25_cb *);
-void ax25_std_t2timer_expiry(ax25_cb *);
-void ax25_std_t3timer_expiry(ax25_cb *);
-void ax25_std_idletimer_expiry(ax25_cb *);
-
-/* ax25_subr.c */
-void ax25_clear_queues(ax25_cb *);
-void ax25_frames_acked(ax25_cb *, unsigned short);
-void ax25_requeue_frames(ax25_cb *);
-int ax25_validate_nr(ax25_cb *, unsigned short);
-int ax25_decode(ax25_cb *, struct sk_buff *, int *, int *, int *);
-void ax25_send_control(ax25_cb *, int, int, int);
-void ax25_return_dm(struct net_device *, ax25_address *, ax25_address *,
- ax25_digi *);
-void ax25_calculate_t1(ax25_cb *);
-void ax25_calculate_rtt(ax25_cb *);
-void ax25_disconnect(ax25_cb *, int);
-
-/* ax25_timer.c */
-void ax25_setup_timers(ax25_cb *);
-void ax25_start_heartbeat(ax25_cb *);
-void ax25_start_t1timer(ax25_cb *);
-void ax25_start_t2timer(ax25_cb *);
-void ax25_start_t3timer(ax25_cb *);
-void ax25_start_idletimer(ax25_cb *);
-void ax25_stop_heartbeat(ax25_cb *);
-void ax25_stop_t1timer(ax25_cb *);
-void ax25_stop_t2timer(ax25_cb *);
-void ax25_stop_t3timer(ax25_cb *);
-void ax25_stop_idletimer(ax25_cb *);
-int ax25_t1timer_running(ax25_cb *);
-unsigned long ax25_display_timer(struct timer_list *);
-
-/* ax25_uid.c */
-extern int ax25_uid_policy;
-ax25_uid_assoc *ax25_findbyuid(kuid_t);
-int __must_check ax25_uid_ioctl(int, struct sockaddr_ax25 *);
-extern const struct seq_operations ax25_uid_seqops;
-void ax25_uid_free(void);
-
-/* sysctl_net_ax25.c */
-#ifdef CONFIG_SYSCTL
-int ax25_register_dev_sysctl(ax25_dev *ax25_dev);
-void ax25_unregister_dev_sysctl(ax25_dev *ax25_dev);
-#else
-static inline int ax25_register_dev_sysctl(ax25_dev *ax25_dev) { return 0; }
-static inline void ax25_unregister_dev_sysctl(ax25_dev *ax25_dev) {}
-#endif /* CONFIG_SYSCTL */
+#define AX25_ADDR_LEN 7
+#define AX25_P_IP 0xCC
#endif
+++ /dev/null
-/* SPDX-License-Identifier: GPL-2.0 */
-/*
- * Declarations of NET/ROM type objects.
- *
- * Jonathan Naylor G4KLX 9/4/95
- */
-
-#ifndef _NETROM_H
-#define _NETROM_H
-
-#include <linux/netrom.h>
-#include <linux/list.h>
-#include <linux/slab.h>
-#include <net/sock.h>
-#include <linux/refcount.h>
-#include <linux/seq_file.h>
-#include <net/ax25.h>
-
-#define NR_NETWORK_LEN 15
-#define NR_TRANSPORT_LEN 5
-
-#define NR_PROTO_IP 0x0C
-
-#define NR_PROTOEXT 0x00
-#define NR_CONNREQ 0x01
-#define NR_CONNACK 0x02
-#define NR_DISCREQ 0x03
-#define NR_DISCACK 0x04
-#define NR_INFO 0x05
-#define NR_INFOACK 0x06
-#define NR_RESET 0x07
-
-#define NR_CHOKE_FLAG 0x80
-#define NR_NAK_FLAG 0x40
-#define NR_MORE_FLAG 0x20
-
-/* Define Link State constants. */
-enum {
- NR_STATE_0,
- NR_STATE_1,
- NR_STATE_2,
- NR_STATE_3
-};
-
-#define NR_COND_ACK_PENDING 0x01
-#define NR_COND_REJECT 0x02
-#define NR_COND_PEER_RX_BUSY 0x04
-#define NR_COND_OWN_RX_BUSY 0x08
-
-#define NR_DEFAULT_T1 120000 /* Outstanding frames - 120 seconds */
-#define NR_DEFAULT_T2 5000 /* Response delay - 5 seconds */
-#define NR_DEFAULT_N2 3 /* Number of Retries - 3 */
-#define NR_DEFAULT_T4 180000 /* Busy Delay - 180 seconds */
-#define NR_DEFAULT_IDLE 0 /* No Activity Timeout - none */
-#define NR_DEFAULT_WINDOW 4 /* Default Window Size - 4 */
-#define NR_DEFAULT_OBS 6 /* Default Obsolescence Count - 6 */
-#define NR_DEFAULT_QUAL 10 /* Default Neighbour Quality - 10 */
-#define NR_DEFAULT_TTL 16 /* Default Time To Live - 16 */
-#define NR_DEFAULT_ROUTING 1 /* Is routing enabled ? */
-#define NR_DEFAULT_FAILS 2 /* Link fails until route fails */
-#define NR_DEFAULT_RESET 0 /* Sent / accept reset cmds? */
-
-#define NR_MODULUS 256
-#define NR_MAX_WINDOW_SIZE 127 /* Maximum Window Allowable - 127 */
-#define NR_MAX_PACKET_SIZE 236 /* Maximum Packet Length - 236 */
-
-struct nr_sock {
- struct sock sock;
- ax25_address user_addr, source_addr, dest_addr;
- struct net_device *device;
- unsigned char my_index, my_id;
- unsigned char your_index, your_id;
- unsigned char state, condition, bpqext, window;
- unsigned short vs, vr, va, vl;
- unsigned char n2, n2count;
- unsigned long t1, t2, t4, idle;
- unsigned short fraglen;
- struct timer_list t1timer;
- struct timer_list t2timer;
- struct timer_list t4timer;
- struct timer_list idletimer;
- struct sk_buff_head ack_queue;
- struct sk_buff_head reseq_queue;
- struct sk_buff_head frag_queue;
-};
-
-#define nr_sk(sk) ((struct nr_sock *)(sk))
-
-struct nr_neigh {
- struct hlist_node neigh_node;
- ax25_address callsign;
- ax25_digi *digipeat;
- ax25_cb *ax25;
- struct net_device *dev;
- unsigned char quality;
- unsigned char locked;
- unsigned short count;
- unsigned int number;
- unsigned char failed;
- refcount_t refcount;
-};
-
-struct nr_route {
- unsigned char quality;
- unsigned char obs_count;
- struct nr_neigh *neighbour;
-};
-
-struct nr_node {
- struct hlist_node node_node;
- ax25_address callsign;
- char mnemonic[7];
- unsigned char which;
- unsigned char count;
- struct nr_route routes[3];
- refcount_t refcount;
- spinlock_t node_lock;
-};
-
-/*********************************************************************
- * nr_node & nr_neigh lists, refcounting and locking
- *********************************************************************/
-
-#define nr_node_hold(__nr_node) \
- refcount_inc(&((__nr_node)->refcount))
-
-static __inline__ void nr_node_put(struct nr_node *nr_node)
-{
- if (refcount_dec_and_test(&nr_node->refcount)) {
- kfree(nr_node);
- }
-}
-
-#define nr_neigh_hold(__nr_neigh) \
- refcount_inc(&((__nr_neigh)->refcount))
-
-static __inline__ void nr_neigh_put(struct nr_neigh *nr_neigh)
-{
- if (refcount_dec_and_test(&nr_neigh->refcount)) {
- if (nr_neigh->ax25)
- ax25_cb_put(nr_neigh->ax25);
- kfree(nr_neigh->digipeat);
- kfree(nr_neigh);
- }
-}
-
-/* nr_node_lock and nr_node_unlock also hold/put the node's refcounter.
- */
-static __inline__ void nr_node_lock(struct nr_node *nr_node)
-{
- nr_node_hold(nr_node);
- spin_lock_bh(&nr_node->node_lock);
-}
-
-static __inline__ void nr_node_unlock(struct nr_node *nr_node)
-{
- spin_unlock_bh(&nr_node->node_lock);
- nr_node_put(nr_node);
-}
-
-#define nr_neigh_for_each(__nr_neigh, list) \
- hlist_for_each_entry(__nr_neigh, list, neigh_node)
-
-#define nr_neigh_for_each_safe(__nr_neigh, node2, list) \
- hlist_for_each_entry_safe(__nr_neigh, node2, list, neigh_node)
-
-#define nr_node_for_each(__nr_node, list) \
- hlist_for_each_entry(__nr_node, list, node_node)
-
-#define nr_node_for_each_safe(__nr_node, node2, list) \
- hlist_for_each_entry_safe(__nr_node, node2, list, node_node)
-
-
-/*********************************************************************/
-
-/* af_netrom.c */
-extern int sysctl_netrom_default_path_quality;
-extern int sysctl_netrom_obsolescence_count_initialiser;
-extern int sysctl_netrom_network_ttl_initialiser;
-extern int sysctl_netrom_transport_timeout;
-extern int sysctl_netrom_transport_maximum_tries;
-extern int sysctl_netrom_transport_acknowledge_delay;
-extern int sysctl_netrom_transport_busy_delay;
-extern int sysctl_netrom_transport_requested_window_size;
-extern int sysctl_netrom_transport_no_activity_timeout;
-extern int sysctl_netrom_routing_control;
-extern int sysctl_netrom_link_fails_count;
-extern int sysctl_netrom_reset_circuit;
-
-int nr_rx_frame(struct sk_buff *, struct net_device *);
-void nr_destroy_socket(struct sock *);
-
-/* nr_dev.c */
-int nr_rx_ip(struct sk_buff *, struct net_device *);
-void nr_setup(struct net_device *);
-
-/* nr_in.c */
-int nr_process_rx_frame(struct sock *, struct sk_buff *);
-
-/* nr_loopback.c */
-void nr_loopback_init(void);
-void nr_loopback_clear(void);
-int nr_loopback_queue(struct sk_buff *);
-
-/* nr_out.c */
-void nr_output(struct sock *, struct sk_buff *);
-void nr_send_nak_frame(struct sock *);
-void nr_kick(struct sock *);
-void nr_transmit_buffer(struct sock *, struct sk_buff *);
-void nr_establish_data_link(struct sock *);
-void nr_enquiry_response(struct sock *);
-void nr_check_iframes_acked(struct sock *, unsigned short);
-
-/* nr_route.c */
-void nr_rt_device_down(struct net_device *);
-struct net_device *nr_dev_first(void);
-struct net_device *nr_dev_get(ax25_address *);
-int nr_rt_ioctl(unsigned int, void __user *);
-void nr_link_failed(ax25_cb *, int);
-int nr_route_frame(struct sk_buff *, ax25_cb *);
-extern const struct seq_operations nr_node_seqops;
-extern const struct seq_operations nr_neigh_seqops;
-void nr_rt_free(void);
-
-/* nr_subr.c */
-void nr_clear_queues(struct sock *);
-void nr_frames_acked(struct sock *, unsigned short);
-void nr_requeue_frames(struct sock *);
-int nr_validate_nr(struct sock *, unsigned short);
-int nr_in_rx_window(struct sock *, unsigned short);
-void nr_write_internal(struct sock *, int);
-
-void __nr_transmit_reply(struct sk_buff *skb, int mine, unsigned char cmdflags);
-
-/*
- * This routine is called when a Connect Acknowledge with the Choke Flag
- * set is needed to refuse a connection.
- */
-#define nr_transmit_refusal(skb, mine) \
-do { \
- __nr_transmit_reply((skb), (mine), NR_CONNACK | NR_CHOKE_FLAG); \
-} while (0)
-
-/*
- * This routine is called when we don't have a circuit matching an incoming
- * NET/ROM packet. This is an G8PZT Xrouter extension.
- */
-#define nr_transmit_reset(skb, mine) \
-do { \
- __nr_transmit_reply((skb), (mine), NR_RESET); \
-} while (0)
-
-void nr_disconnect(struct sock *, int);
-
-/* nr_timer.c */
-void nr_init_timers(struct sock *sk);
-void nr_start_heartbeat(struct sock *);
-void nr_start_t1timer(struct sock *);
-void nr_start_t2timer(struct sock *);
-void nr_start_t4timer(struct sock *);
-void nr_start_idletimer(struct sock *);
-void nr_stop_heartbeat(struct sock *);
-void nr_stop_t1timer(struct sock *);
-void nr_stop_t2timer(struct sock *);
-void nr_stop_t4timer(struct sock *);
-void nr_stop_idletimer(struct sock *);
-int nr_t1timer_running(struct sock *);
-
-/* sysctl_net_netrom.c */
-int nr_register_sysctl(void);
-void nr_unregister_sysctl(void);
-
-#endif
/* SPDX-License-Identifier: GPL-2.0 */
-/*
- * Declarations of Rose type objects.
- *
- * Jonathan Naylor G4KLX 25/8/96
- */
-
#ifndef _ROSE_H
-#define _ROSE_H
-
-#include <linux/refcount.h>
-#include <linux/rose.h>
-#include <net/ax25.h>
-#include <net/sock.h>
-
-#define ROSE_ADDR_LEN 5
-
-#define ROSE_MIN_LEN 3
-
-#define ROSE_CALL_REQ_ADDR_LEN_OFF 3
-#define ROSE_CALL_REQ_ADDR_LEN_VAL 0xAA /* each address is 10 digits */
-#define ROSE_CALL_REQ_DEST_ADDR_OFF 4
-#define ROSE_CALL_REQ_SRC_ADDR_OFF 9
-#define ROSE_CALL_REQ_FACILITIES_OFF 14
-
-#define ROSE_GFI 0x10
-#define ROSE_Q_BIT 0x80
-#define ROSE_D_BIT 0x40
-#define ROSE_M_BIT 0x10
-
-#define ROSE_CALL_REQUEST 0x0B
-#define ROSE_CALL_ACCEPTED 0x0F
-#define ROSE_CLEAR_REQUEST 0x13
-#define ROSE_CLEAR_CONFIRMATION 0x17
-#define ROSE_DATA 0x00
-#define ROSE_INTERRUPT 0x23
-#define ROSE_INTERRUPT_CONFIRMATION 0x27
-#define ROSE_RR 0x01
-#define ROSE_RNR 0x05
-#define ROSE_REJ 0x09
-#define ROSE_RESET_REQUEST 0x1B
-#define ROSE_RESET_CONFIRMATION 0x1F
-#define ROSE_REGISTRATION_REQUEST 0xF3
-#define ROSE_REGISTRATION_CONFIRMATION 0xF7
-#define ROSE_RESTART_REQUEST 0xFB
-#define ROSE_RESTART_CONFIRMATION 0xFF
-#define ROSE_DIAGNOSTIC 0xF1
-#define ROSE_ILLEGAL 0xFD
-
-/* Define Link State constants. */
-
-enum {
- ROSE_STATE_0, /* Ready */
- ROSE_STATE_1, /* Awaiting Call Accepted */
- ROSE_STATE_2, /* Awaiting Clear Confirmation */
- ROSE_STATE_3, /* Data Transfer */
- ROSE_STATE_4, /* Awaiting Reset Confirmation */
- ROSE_STATE_5 /* Deferred Call Acceptance */
-};
-
-#define ROSE_DEFAULT_T0 180000 /* Default T10 T20 value */
-#define ROSE_DEFAULT_T1 200000 /* Default T11 T21 value */
-#define ROSE_DEFAULT_T2 180000 /* Default T12 T22 value */
-#define ROSE_DEFAULT_T3 180000 /* Default T13 T23 value */
-#define ROSE_DEFAULT_HB 5000 /* Default Holdback value */
-#define ROSE_DEFAULT_IDLE 0 /* No Activity Timeout - none */
-#define ROSE_DEFAULT_ROUTING 1 /* Default routing flag */
-#define ROSE_DEFAULT_FAIL_TIMEOUT 120000 /* Time until link considered usable */
-#define ROSE_DEFAULT_MAXVC 50 /* Maximum number of VCs per neighbour */
-#define ROSE_DEFAULT_WINDOW_SIZE 7 /* Default window size */
-
-#define ROSE_MODULUS 8
-#define ROSE_MAX_PACKET_SIZE 251 /* Maximum packet size */
-
-#define ROSE_COND_ACK_PENDING 0x01
-#define ROSE_COND_PEER_RX_BUSY 0x02
-#define ROSE_COND_OWN_RX_BUSY 0x04
-
-#define FAC_NATIONAL 0x00
-#define FAC_CCITT 0x0F
-
-#define FAC_NATIONAL_RAND 0x7F
-#define FAC_NATIONAL_FLAGS 0x3F
-#define FAC_NATIONAL_DEST_DIGI 0xE9
-#define FAC_NATIONAL_SRC_DIGI 0xEB
-#define FAC_NATIONAL_FAIL_CALL 0xED
-#define FAC_NATIONAL_FAIL_ADD 0xEE
-#define FAC_NATIONAL_DIGIS 0xEF
-
-#define FAC_CCITT_DEST_NSAP 0xC9
-#define FAC_CCITT_SRC_NSAP 0xCB
-
-struct rose_neigh {
- struct rose_neigh *next;
- ax25_address callsign;
- ax25_digi *digipeat;
- ax25_cb *ax25;
- struct net_device *dev;
- unsigned short count;
- refcount_t use;
- unsigned int number;
- char restarted;
- char dce_mode;
- char loopback;
- struct sk_buff_head queue;
- struct timer_list t0timer;
- struct timer_list ftimer;
-};
-
-struct rose_node {
- struct rose_node *next;
- rose_address address;
- unsigned short mask;
- unsigned char count;
- char loopback;
- struct rose_neigh *neighbour[3];
-};
-
-struct rose_route {
- struct rose_route *next;
- unsigned int lci1, lci2;
- rose_address src_addr, dest_addr;
- ax25_address src_call, dest_call;
- struct rose_neigh *neigh1, *neigh2;
- unsigned int rand;
-};
-
-struct rose_sock {
- struct sock sock;
- rose_address source_addr, dest_addr;
- ax25_address source_call, dest_call;
- unsigned char source_ndigis, dest_ndigis;
- ax25_address source_digis[ROSE_MAX_DIGIS];
- ax25_address dest_digis[ROSE_MAX_DIGIS];
- struct rose_neigh *neighbour;
- struct net_device *device;
- netdevice_tracker dev_tracker;
- unsigned int lci, rand;
- unsigned char state, condition, qbitincl, defer;
- unsigned char cause, diagnostic;
- unsigned short vs, vr, va, vl;
- unsigned long t1, t2, t3, hb, idle;
-#ifdef M_BIT
- unsigned short fraglen;
- struct sk_buff_head frag_queue;
-#endif
- struct sk_buff_head ack_queue;
- struct rose_facilities_struct facilities;
- struct timer_list timer;
- struct timer_list idletimer;
-};
-
-#define rose_sk(sk) ((struct rose_sock *)(sk))
-
-static inline void rose_neigh_hold(struct rose_neigh *rose_neigh)
-{
- refcount_inc(&rose_neigh->use);
-}
-
-static inline void rose_neigh_put(struct rose_neigh *rose_neigh)
-{
- if (refcount_dec_and_test(&rose_neigh->use)) {
- if (rose_neigh->ax25)
- ax25_cb_put(rose_neigh->ax25);
- kfree(rose_neigh->digipeat);
- kfree(rose_neigh);
- }
-}
-
-/* af_rose.c */
-extern ax25_address rose_callsign;
-extern int sysctl_rose_restart_request_timeout;
-extern int sysctl_rose_call_request_timeout;
-extern int sysctl_rose_reset_request_timeout;
-extern int sysctl_rose_clear_request_timeout;
-extern int sysctl_rose_no_activity_timeout;
-extern int sysctl_rose_ack_hold_back_timeout;
-extern int sysctl_rose_routing_control;
-extern int sysctl_rose_link_fail_timeout;
-extern int sysctl_rose_maximum_vcs;
-extern int sysctl_rose_window_size;
-
-int rosecmp(const rose_address *, const rose_address *);
-int rosecmpm(const rose_address *, const rose_address *, unsigned short);
-char *rose2asc(char *buf, const rose_address *);
-struct sock *rose_find_socket(unsigned int, struct rose_neigh *);
-void rose_kill_by_neigh(struct rose_neigh *);
-unsigned int rose_new_lci(struct rose_neigh *);
-int rose_rx_call_request(struct sk_buff *, struct net_device *,
- struct rose_neigh *, unsigned int);
-void rose_destroy_socket(struct sock *);
-
-/* rose_dev.c */
-void rose_setup(struct net_device *);
-
-/* rose_in.c */
-int rose_process_rx_frame(struct sock *, struct sk_buff *);
-
-/* rose_link.c */
-void rose_start_ftimer(struct rose_neigh *);
-void rose_stop_ftimer(struct rose_neigh *);
-void rose_stop_t0timer(struct rose_neigh *);
-int rose_ftimer_running(struct rose_neigh *);
-void rose_link_rx_restart(struct sk_buff *, struct rose_neigh *,
- unsigned short);
-void rose_transmit_clear_request(struct rose_neigh *, unsigned int,
- unsigned char, unsigned char);
-void rose_transmit_link(struct sk_buff *, struct rose_neigh *);
-
-/* rose_loopback.c */
-void rose_loopback_init(void);
-void rose_loopback_clear(void);
-int rose_loopback_queue(struct sk_buff *, struct rose_neigh *);
-
-/* rose_out.c */
-void rose_kick(struct sock *);
-void rose_enquiry_response(struct sock *);
-
-/* rose_route.c */
-extern struct rose_neigh *rose_loopback_neigh;
-extern const struct seq_operations rose_neigh_seqops;
-extern const struct seq_operations rose_node_seqops;
-extern struct seq_operations rose_route_seqops;
-
-void rose_add_loopback_neigh(void);
-int __must_check rose_add_loopback_node(const rose_address *);
-void rose_del_loopback_node(const rose_address *);
-void rose_rt_device_down(struct net_device *);
-void rose_link_device_down(struct net_device *);
-struct net_device *rose_dev_first(void);
-struct net_device *rose_dev_get(rose_address *);
-struct rose_route *rose_route_free_lci(unsigned int, struct rose_neigh *);
-struct rose_neigh *rose_get_neigh(rose_address *, unsigned char *,
- unsigned char *, int);
-int rose_rt_ioctl(unsigned int, void __user *);
-void rose_link_failed(ax25_cb *, int);
-int rose_route_frame(struct sk_buff *, ax25_cb *);
-void rose_rt_free(void);
-
-/* rose_subr.c */
-void rose_clear_queues(struct sock *);
-void rose_frames_acked(struct sock *, unsigned short);
-void rose_requeue_frames(struct sock *);
-int rose_validate_nr(struct sock *, unsigned short);
-void rose_write_internal(struct sock *, int);
-int rose_decode(struct sk_buff *, int *, int *, int *, int *, int *);
-int rose_parse_facilities(unsigned char *, unsigned int,
- struct rose_facilities_struct *);
-void rose_disconnect(struct sock *, int, int, int);
-
-/* rose_timer.c */
-void rose_start_heartbeat(struct sock *);
-void rose_start_t1timer(struct sock *);
-void rose_start_t2timer(struct sock *);
-void rose_start_t3timer(struct sock *);
-void rose_start_hbtimer(struct sock *);
-void rose_start_idletimer(struct sock *);
-void rose_stop_heartbeat(struct sock *);
-void rose_stop_timer(struct sock *);
-void rose_stop_idletimer(struct sock *);
+#define _ROSE_H
-/* sysctl_net_rose.c */
-void rose_register_sysctl(void);
-void rose_unregister_sysctl(void);
+#define ROSE_ADDR_LEN 5
#endif
+++ /dev/null
-/* SPDX-License-Identifier: GPL-2.0 WITH Linux-syscall-note */
-/*
- * The Linux BAYCOM driver for the Baycom serial 1200 baud modem
- * and the parallel 9600 baud modem
- * (C) 1997-1998 by Thomas Sailer, HB9JNX/AE4WA
- */
-
-#ifndef _BAYCOM_H
-#define _BAYCOM_H
-
-/* -------------------------------------------------------------------- */
-/*
- * structs for the IOCTL commands
- */
-
-struct baycom_debug_data {
- unsigned long debug1;
- unsigned long debug2;
- long debug3;
-};
-
-struct baycom_ioctl {
- int cmd;
- union {
- struct baycom_debug_data dbg;
- } data;
-};
-
-/* -------------------------------------------------------------------- */
-
-/*
- * ioctl values change for baycom
- */
-#define BAYCOMCTL_GETDEBUG 0x92
-
-/* -------------------------------------------------------------------- */
-
-#endif /* _BAYCOM_H */
-
-/* --------------------------------------------------------------------- */
+++ /dev/null
-/* SPDX-License-Identifier: GPL-2.0 WITH Linux-syscall-note */
-/*
- * hdlcdrv.h -- HDLC packet radio network driver.
- * The Linux soundcard driver for 1200 baud and 9600 baud packet radio
- * (C) 1996-1998 by Thomas Sailer, HB9JNX/AE4WA
- */
-
-#ifndef _UAPI_HDLCDRV_H
-#define _UAPI_HDLCDRV_H
-
-/* -------------------------------------------------------------------- */
-/*
- * structs for the IOCTL commands
- */
-
-struct hdlcdrv_params {
- int iobase;
- int irq;
- int dma;
- int dma2;
- int seriobase;
- int pariobase;
- int midiiobase;
-};
-
-struct hdlcdrv_channel_params {
- int tx_delay; /* the transmitter keyup delay in 10ms units */
- int tx_tail; /* the transmitter keyoff delay in 10ms units */
- int slottime; /* the slottime in 10ms; usually 10 = 100ms */
- int ppersist; /* the p-persistence 0..255 */
- int fulldup; /* some driver do not support full duplex, setting */
- /* this just makes them send even if DCD is on */
-};
-
-struct hdlcdrv_old_channel_state {
- int ptt;
- int dcd;
- int ptt_keyed;
-};
-
-struct hdlcdrv_channel_state {
- int ptt;
- int dcd;
- int ptt_keyed;
- unsigned long tx_packets;
- unsigned long tx_errors;
- unsigned long rx_packets;
- unsigned long rx_errors;
-};
-
-struct hdlcdrv_ioctl {
- int cmd;
- union {
- struct hdlcdrv_params mp;
- struct hdlcdrv_channel_params cp;
- struct hdlcdrv_channel_state cs;
- struct hdlcdrv_old_channel_state ocs;
- unsigned int calibrate;
- unsigned char bits;
- char modename[128];
- char drivername[32];
- } data;
-};
-
-/* -------------------------------------------------------------------- */
-
-/*
- * ioctl values
- */
-#define HDLCDRVCTL_GETMODEMPAR 0
-#define HDLCDRVCTL_SETMODEMPAR 1
-#define HDLCDRVCTL_MODEMPARMASK 2 /* not handled by hdlcdrv */
-#define HDLCDRVCTL_GETCHANNELPAR 10
-#define HDLCDRVCTL_SETCHANNELPAR 11
-#define HDLCDRVCTL_OLDGETSTAT 20
-#define HDLCDRVCTL_CALIBRATE 21
-#define HDLCDRVCTL_GETSTAT 22
-
-/*
- * these are mainly for debugging purposes
- */
-#define HDLCDRVCTL_GETSAMPLES 30
-#define HDLCDRVCTL_GETBITS 31
-
-/*
- * not handled by hdlcdrv, but by its depending drivers
- */
-#define HDLCDRVCTL_GETMODE 40
-#define HDLCDRVCTL_SETMODE 41
-#define HDLCDRVCTL_MODELIST 42
-#define HDLCDRVCTL_DRIVERNAME 43
-
-/*
- * mask of needed modem parameters, returned by HDLCDRVCTL_MODEMPARMASK
- */
-#define HDLCDRV_PARMASK_IOBASE (1<<0)
-#define HDLCDRV_PARMASK_IRQ (1<<1)
-#define HDLCDRV_PARMASK_DMA (1<<2)
-#define HDLCDRV_PARMASK_DMA2 (1<<3)
-#define HDLCDRV_PARMASK_SERIOBASE (1<<4)
-#define HDLCDRV_PARMASK_PARIOBASE (1<<5)
-#define HDLCDRV_PARMASK_MIDIIOBASE (1<<6)
-
-/* -------------------------------------------------------------------- */
-
-
-/* -------------------------------------------------------------------- */
-
-#endif /* _UAPI_HDLCDRV_H */
-
-/* -------------------------------------------------------------------- */
+++ /dev/null
-/* SPDX-License-Identifier: GPL-2.0 WITH Linux-syscall-note */
-/*
- * These are the public elements of the Linux kernel NET/ROM implementation.
- * For kernel AX.25 see the file ax25.h. This file requires ax25.h for the
- * definition of the ax25_address structure.
- */
-
-#ifndef NETROM_KERNEL_H
-#define NETROM_KERNEL_H
-
-#include <linux/ax25.h>
-
-#define NETROM_MTU 236
-
-#define NETROM_T1 1
-#define NETROM_T2 2
-#define NETROM_N2 3
-#define NETROM_T4 6
-#define NETROM_IDLE 7
-
-#define SIOCNRDECOBS (SIOCPROTOPRIVATE+2)
-
-struct nr_route_struct {
-#define NETROM_NEIGH 0
-#define NETROM_NODE 1
- int type;
- ax25_address callsign;
- char device[16];
- unsigned int quality;
- char mnemonic[7];
- ax25_address neighbour;
- unsigned int obs_count;
- unsigned int ndigis;
- ax25_address digipeaters[AX25_MAX_DIGIS];
-};
-
-#endif
+++ /dev/null
-/* SPDX-License-Identifier: GPL-2.0 WITH Linux-syscall-note */
-/*
- * These are the public elements of the Linux kernel Rose implementation.
- * For kernel AX.25 see the file ax25.h. This file requires ax25.h for the
- * definition of the ax25_address structure.
- */
-
-#ifndef ROSE_KERNEL_H
-#define ROSE_KERNEL_H
-
-#include <linux/socket.h>
-#include <linux/ax25.h>
-
-#define ROSE_MTU 251
-
-#define ROSE_MAX_DIGIS 6
-
-#define ROSE_DEFER 1
-#define ROSE_T1 2
-#define ROSE_T2 3
-#define ROSE_T3 4
-#define ROSE_IDLE 5
-#define ROSE_QBITINCL 6
-#define ROSE_HOLDBACK 7
-
-#define SIOCRSGCAUSE (SIOCPROTOPRIVATE+0)
-#define SIOCRSSCAUSE (SIOCPROTOPRIVATE+1)
-#define SIOCRSL2CALL (SIOCPROTOPRIVATE+2)
-#define SIOCRSSL2CALL (SIOCPROTOPRIVATE+2)
-#define SIOCRSACCEPT (SIOCPROTOPRIVATE+3)
-#define SIOCRSCLRRT (SIOCPROTOPRIVATE+4)
-#define SIOCRSGL2CALL (SIOCPROTOPRIVATE+5)
-#define SIOCRSGFACILITIES (SIOCPROTOPRIVATE+6)
-
-#define ROSE_DTE_ORIGINATED 0x00
-#define ROSE_NUMBER_BUSY 0x01
-#define ROSE_INVALID_FACILITY 0x03
-#define ROSE_NETWORK_CONGESTION 0x05
-#define ROSE_OUT_OF_ORDER 0x09
-#define ROSE_ACCESS_BARRED 0x0B
-#define ROSE_NOT_OBTAINABLE 0x0D
-#define ROSE_REMOTE_PROCEDURE 0x11
-#define ROSE_LOCAL_PROCEDURE 0x13
-#define ROSE_SHIP_ABSENT 0x39
-
-typedef struct {
- char rose_addr[5];
-} rose_address;
-
-struct sockaddr_rose {
- __kernel_sa_family_t srose_family;
- rose_address srose_addr;
- ax25_address srose_call;
- int srose_ndigis;
- ax25_address srose_digi;
-};
-
-struct full_sockaddr_rose {
- __kernel_sa_family_t srose_family;
- rose_address srose_addr;
- ax25_address srose_call;
- unsigned int srose_ndigis;
- ax25_address srose_digis[ROSE_MAX_DIGIS];
-};
-
-struct rose_route_struct {
- rose_address address;
- unsigned short mask;
- ax25_address neighbour;
- char device[16];
- unsigned char ndigis;
- ax25_address digipeaters[AX25_MAX_DIGIS];
-};
-
-struct rose_cause_struct {
- unsigned char cause;
- unsigned char diagnostic;
-};
-
-struct rose_facilities_struct {
- rose_address source_addr, dest_addr;
- ax25_address source_call, dest_call;
- unsigned char source_ndigis, dest_ndigis;
- ax25_address source_digis[ROSE_MAX_DIGIS];
- ax25_address dest_digis[ROSE_MAX_DIGIS];
- unsigned int rand;
- rose_address fail_addr;
- ax25_address fail_call;
-};
-
-#endif
+++ /dev/null
-/* SPDX-License-Identifier: GPL-2.0 WITH Linux-syscall-note */
-/* $Id: scc.h,v 1.29 1997/04/02 14:56:45 jreuter Exp jreuter $ */
-
-#ifndef _UAPI_SCC_H
-#define _UAPI_SCC_H
-
-#include <linux/sockios.h>
-
-/* selection of hardware types */
-
-#define PA0HZP 0x00 /* hardware type for PA0HZP SCC card and compatible */
-#define EAGLE 0x01 /* hardware type for EAGLE card */
-#define PC100 0x02 /* hardware type for PC100 card */
-#define PRIMUS 0x04 /* hardware type for PRIMUS-PC (DG9BL) card */
-#define DRSI 0x08 /* hardware type for DRSI PC*Packet card */
-#define BAYCOM 0x10 /* hardware type for BayCom (U)SCC */
-
-/* DEV ioctl() commands */
-
-enum SCC_ioctl_cmds {
- SIOCSCCRESERVED = SIOCDEVPRIVATE,
- SIOCSCCCFG,
- SIOCSCCINI,
- SIOCSCCCHANINI,
- SIOCSCCSMEM,
- SIOCSCCGKISS,
- SIOCSCCSKISS,
- SIOCSCCGSTAT,
- SIOCSCCCAL
-};
-
-/* Device parameter control (from WAMPES) */
-
-enum L1_params {
- PARAM_DATA,
- PARAM_TXDELAY,
- PARAM_PERSIST,
- PARAM_SLOTTIME,
- PARAM_TXTAIL,
- PARAM_FULLDUP,
- PARAM_SOFTDCD, /* was: PARAM_HW */
- PARAM_MUTE, /* ??? */
- PARAM_DTR,
- PARAM_RTS,
- PARAM_SPEED,
- PARAM_ENDDELAY, /* ??? */
- PARAM_GROUP,
- PARAM_IDLE,
- PARAM_MIN,
- PARAM_MAXKEY,
- PARAM_WAIT,
- PARAM_MAXDEFER,
- PARAM_TX,
- PARAM_HWEVENT = 31,
- PARAM_RETURN = 255 /* reset kiss mode */
-};
-
-/* fulldup parameter */
-
-enum FULLDUP_modes {
- KISS_DUPLEX_HALF, /* normal CSMA operation */
- KISS_DUPLEX_FULL, /* fullduplex, key down trx after transmission */
- KISS_DUPLEX_LINK, /* fullduplex, key down trx after 'idletime' sec */
- KISS_DUPLEX_OPTIMA /* fullduplex, let the protocol layer control the hw */
-};
-
-/* misc. parameters */
-
-#define TIMER_OFF 65535U /* to switch off timers */
-#define NO_SUCH_PARAM 65534U /* param not implemented */
-
-/* HWEVENT parameter */
-
-enum HWEVENT_opts {
- HWEV_DCD_ON,
- HWEV_DCD_OFF,
- HWEV_ALL_SENT
-};
-
-/* channel grouping */
-
-#define RXGROUP 0100 /* if set, only tx when all channels clear */
-#define TXGROUP 0200 /* if set, don't transmit simultaneously */
-
-/* Tx/Rx clock sources */
-
-enum CLOCK_sources {
- CLK_DPLL, /* normal halfduplex operation */
- CLK_EXTERNAL, /* external clocking (G3RUH/DF9IC modems) */
- CLK_DIVIDER, /* Rx = DPLL, Tx = divider (fullduplex with */
- /* modems without clock regeneration */
- CLK_BRG /* experimental fullduplex mode with DPLL/BRG for */
- /* MODEMs without clock recovery */
-};
-
-/* Tx state */
-
-enum TX_state {
- TXS_IDLE, /* Transmitter off, no data pending */
- TXS_BUSY, /* waiting for permission to send / tailtime */
- TXS_ACTIVE, /* Transmitter on, sending data */
- TXS_NEWFRAME, /* reset CRC and send (next) frame */
- TXS_IDLE2, /* Transmitter on, no data pending */
- TXS_WAIT, /* Waiting for Mintime to expire */
- TXS_TIMEOUT /* We had a transmission timeout */
-};
-
-typedef unsigned long io_port; /* type definition for an 'io port address' */
-
-/* SCC statistical information */
-
-struct scc_stat {
- long rxints; /* Receiver interrupts */
- long txints; /* Transmitter interrupts */
- long exints; /* External/status interrupts */
- long spints; /* Special receiver interrupts */
-
- long txframes; /* Packets sent */
- long rxframes; /* Number of Frames Actually Received */
- long rxerrs; /* CRC Errors */
- long txerrs; /* KISS errors */
-
- unsigned int nospace; /* "Out of buffers" */
- unsigned int rx_over; /* Receiver Overruns */
- unsigned int tx_under; /* Transmitter Underruns */
-
- unsigned int tx_state; /* Transmitter state */
- int tx_queued; /* tx frames enqueued */
-
- unsigned int maxqueue; /* allocated tx_buffers */
- unsigned int bufsize; /* used buffersize */
-};
-
-struct scc_modem {
- long speed; /* Line speed, bps */
- char clocksrc; /* 0 = DPLL, 1 = external, 2 = divider */
- char nrz; /* NRZ instead of NRZI */
-};
-
-struct scc_kiss_cmd {
- int command; /* one of the KISS-Commands defined above */
- unsigned param; /* KISS-Param */
-};
-
-struct scc_hw_config {
- io_port data_a; /* data port channel A */
- io_port ctrl_a; /* control port channel A */
- io_port data_b; /* data port channel B */
- io_port ctrl_b; /* control port channel B */
- io_port vector_latch; /* INTACK-Latch (#) */
- io_port special; /* special function port */
-
- int irq; /* irq */
- long clock; /* clock */
- char option; /* command for function port */
-
- char brand; /* hardware type */
- char escc; /* use ext. features of a 8580/85180/85280 */
-};
-
-/* (#) only one INTACK latch allowed. */
-
-
-struct scc_mem_config {
- unsigned int dummy;
- unsigned int bufsize;
-};
-
-struct scc_calibrate {
- unsigned int time;
- unsigned char pattern;
-};
-
-#endif /* _UAPI_SCC_H */
endmenu # Networking options
-source "net/ax25/Kconfig"
source "net/can/Kconfig"
source "net/bluetooth/Kconfig"
source "net/rxrpc/Kconfig"
obj-$(CONFIG_ATALK) += appletalk/
obj-$(CONFIG_X25) += x25/
obj-$(CONFIG_LAPB) += lapb/
-obj-$(CONFIG_NETROM) += netrom/
-obj-$(CONFIG_ROSE) += rose/
-obj-$(CONFIG_AX25) += ax25/
obj-$(CONFIG_CAN) += can/
obj-$(CONFIG_BT) += bluetooth/
obj-$(CONFIG_SUNRPC) += sunrpc/
+++ /dev/null
-# SPDX-License-Identifier: GPL-2.0-only
-#
-# Amateur Radio protocols and AX.25 device configuration
-#
-
-menuconfig HAMRADIO
- depends on NET
- bool "Amateur Radio support"
- help
- If you want to connect your Linux box to an amateur radio, answer Y
- here. You want to read <https://www.tapr.org/>
- and more specifically about AX.25 on Linux
- <https://linux-ax25.in-berlin.de>.
-
- Note that the answer to this question won't directly affect the
- kernel: saying N will just cause the configurator to skip all
- the questions about amateur radio.
-
-comment "Packet Radio protocols"
- depends on HAMRADIO
-
-config AX25
- tristate "Amateur Radio AX.25 Level 2 protocol"
- depends on HAMRADIO
- help
- This is the protocol used for computer communication over amateur
- radio. It is either used by itself for point-to-point links, or to
- carry other protocols such as tcp/ip. To use it, you need a device
- that connects your Linux box to your amateur radio. You can either
- use a low speed TNC (a Terminal Node Controller acts as a kind of
- modem connecting your computer's serial port to your radio's
- microphone input and speaker output) supporting the KISS protocol or
- one of the various SCC cards that are supported by the generic Z8530
- or the DMA SCC driver. Another option are the Baycom modem serial
- and parallel port hacks or the sound card modem (supported by their
- own drivers). If you say Y here, you also have to say Y to one of
- those drivers.
-
- Information about where to get supporting software for Linux amateur
- radio as well as information about how to configure an AX.25 port is
- contained in the AX25-HOWTO, available from
- <https://www.tldp.org/docs.html#howto>. You might also want to
- check out the file <file:Documentation/networking/ax25.rst> in the
- kernel source. More information about digital amateur radio in
- general is on the WWW at
- <https://www.tapr.org/>.
-
- To compile this driver as a module, choose M here: the
- module will be called ax25.
-
-config AX25_DAMA_SLAVE
- bool "AX.25 DAMA Slave support"
- default y
- depends on AX25
- help
- DAMA is a mechanism to prevent collisions when doing AX.25
- networking. A DAMA server (called "master") accepts incoming traffic
- from clients (called "slaves") and redistributes it to other slaves.
- If you say Y here, your Linux box will act as a DAMA slave; this is
- transparent in that you don't have to do any special DAMA
- configuration. Linux cannot yet act as a DAMA server. This option
- only compiles DAMA slave support into the kernel. It still needs to
- be enabled at runtime. For more about DAMA see
- <https://linux-ax25.in-berlin.de>. If unsure, say Y.
-
-config NETROM
- tristate "Amateur Radio NET/ROM protocol"
- depends on AX25
- help
- NET/ROM is a network layer protocol on top of AX.25 useful for
- routing.
-
- A comprehensive listing of all the software for Linux amateur radio
- users as well as information about how to configure an AX.25 port is
- contained in the Linux Ham Wiki, available from
- <https://linux-ax25.in-berlin.de>. You also might want to check out
- the file <file:Documentation/networking/ax25.rst>. More information
- about digital amateur radio in general is on the WWW at
- <https://www.tapr.org/>.
-
- To compile this driver as a module, choose M here: the
- module will be called netrom.
-
-config ROSE
- tristate "Amateur Radio X.25 PLP (Rose)"
- depends on AX25
- help
- The Packet Layer Protocol (PLP) is a way to route packets over X.25
- connections in general and amateur radio AX.25 connections in
- particular, essentially an alternative to NET/ROM.
-
- A comprehensive listing of all the software for Linux amateur radio
- users as well as information about how to configure an AX.25 port is
- contained in the Linux Ham Wiki, available from
- <https://linux-ax25.in-berlin.de>. You also might want to check out
- the file <file:Documentation/networking/ax25.rst>. More information
- about digital amateur radio in general is on the WWW at
- <https://www.tapr.org/>.
-
- To compile this driver as a module, choose M here: the
- module will be called rose.
-
-menu "AX.25 network device drivers"
- depends on HAMRADIO && AX25
-
-source "drivers/net/hamradio/Kconfig"
-
-endmenu
+++ /dev/null
-# SPDX-License-Identifier: GPL-2.0
-#
-# Makefile for the Linux AX.25 layer.
-#
-
-obj-$(CONFIG_AX25) += ax25.o
-
-ax25-y := ax25_addr.o ax25_dev.o ax25_iface.o ax25_in.o ax25_ip.o ax25_out.o \
- ax25_route.o ax25_std_in.o ax25_std_subr.o ax25_std_timer.o \
- ax25_subr.o ax25_timer.o ax25_uid.o af_ax25.o
-ax25-$(CONFIG_AX25_DAMA_SLAVE) += ax25_ds_in.o ax25_ds_subr.o ax25_ds_timer.o
-ax25-$(CONFIG_SYSCTL) += sysctl_net_ax25.o
+++ /dev/null
-// SPDX-License-Identifier: GPL-2.0-or-later
-/*
- *
- * Copyright (C) Alan Cox GW4PTS (alan@lxorguk.ukuu.org.uk)
- * Copyright (C) Jonathan Naylor G4KLX (g4klx@g4klx.demon.co.uk)
- * Copyright (C) Darryl Miles G7LED (dlm@g7led.demon.co.uk)
- * Copyright (C) Steven Whitehouse GW7RRM (stevew@acm.org)
- * Copyright (C) Joerg Reuter DL1BKE (jreuter@yaina.de)
- * Copyright (C) Hans-Joachim Hetscher DD8NE (dd8ne@bnv-bamberg.de)
- * Copyright (C) Hans Alblas PE1AYX (hans@esrac.ele.tue.nl)
- * Copyright (C) Frederic Rible F1OAT (frible@teaser.fr)
- */
-#include <linux/capability.h>
-#include <linux/module.h>
-#include <linux/errno.h>
-#include <linux/types.h>
-#include <linux/socket.h>
-#include <linux/in.h>
-#include <linux/kernel.h>
-#include <linux/sched/signal.h>
-#include <linux/timer.h>
-#include <linux/string.h>
-#include <linux/sockios.h>
-#include <linux/net.h>
-#include <linux/slab.h>
-#include <net/ax25.h>
-#include <linux/inet.h>
-#include <linux/netdevice.h>
-#include <linux/if_arp.h>
-#include <linux/skbuff.h>
-#include <net/sock.h>
-#include <linux/uaccess.h>
-#include <linux/fcntl.h>
-#include <linux/termios.h> /* For TIOCINQ/OUTQ */
-#include <linux/mm.h>
-#include <linux/interrupt.h>
-#include <linux/notifier.h>
-#include <linux/proc_fs.h>
-#include <linux/stat.h>
-#include <linux/sysctl.h>
-#include <linux/init.h>
-#include <linux/spinlock.h>
-#include <net/net_namespace.h>
-#include <net/tcp_states.h>
-#include <net/ip.h>
-#include <net/arp.h>
-
-
-
-HLIST_HEAD(ax25_list);
-DEFINE_SPINLOCK(ax25_list_lock);
-
-static const struct proto_ops ax25_proto_ops;
-
-static void ax25_free_sock(struct sock *sk)
-{
- ax25_cb_put(sk_to_ax25(sk));
-}
-
-/*
- * Socket removal during an interrupt is now safe.
- */
-static void ax25_cb_del(ax25_cb *ax25)
-{
- spin_lock_bh(&ax25_list_lock);
- if (!hlist_unhashed(&ax25->ax25_node)) {
- hlist_del_init(&ax25->ax25_node);
- ax25_cb_put(ax25);
- }
- spin_unlock_bh(&ax25_list_lock);
-}
-
-/*
- * Kill all bound sockets on a dropped device.
- */
-static void ax25_kill_by_device(struct net_device *dev)
-{
- ax25_dev *ax25_dev;
- ax25_cb *s;
- struct sock *sk;
-
- if ((ax25_dev = ax25_dev_ax25dev(dev)) == NULL)
- return;
- ax25_dev->device_up = false;
-
- spin_lock_bh(&ax25_list_lock);
-again:
- ax25_for_each(s, &ax25_list) {
- if (s->ax25_dev == ax25_dev) {
- sk = s->sk;
- if (!sk) {
- spin_unlock_bh(&ax25_list_lock);
- ax25_disconnect(s, ENETUNREACH);
- s->ax25_dev = NULL;
- ax25_cb_del(s);
- spin_lock_bh(&ax25_list_lock);
- goto again;
- }
- sock_hold(sk);
- spin_unlock_bh(&ax25_list_lock);
- lock_sock(sk);
- ax25_disconnect(s, ENETUNREACH);
- s->ax25_dev = NULL;
- if (sk->sk_socket) {
- netdev_put(ax25_dev->dev,
- &s->dev_tracker);
- ax25_dev_put(ax25_dev);
- }
- ax25_cb_del(s);
- release_sock(sk);
- spin_lock_bh(&ax25_list_lock);
- sock_put(sk);
- /* The entry could have been deleted from the
- * list meanwhile and thus the next pointer is
- * no longer valid. Play it safe and restart
- * the scan. Forward progress is ensured
- * because we set s->ax25_dev to NULL and we
- * are never passed a NULL 'dev' argument.
- */
- goto again;
- }
- }
- spin_unlock_bh(&ax25_list_lock);
-}
-
-/*
- * Handle device status changes.
- */
-static int ax25_device_event(struct notifier_block *this, unsigned long event,
- void *ptr)
-{
- struct net_device *dev = netdev_notifier_info_to_dev(ptr);
-
- if (!net_eq(dev_net(dev), &init_net))
- return NOTIFY_DONE;
-
- /* Reject non AX.25 devices */
- if (dev->type != ARPHRD_AX25)
- return NOTIFY_DONE;
-
- switch (event) {
- case NETDEV_UP:
- ax25_dev_device_up(dev);
- break;
- case NETDEV_DOWN:
- ax25_kill_by_device(dev);
- ax25_rt_device_down(dev);
- ax25_dev_device_down(dev);
- break;
- default:
- break;
- }
-
- return NOTIFY_DONE;
-}
-
-/*
- * Add a socket to the bound sockets list.
- */
-void ax25_cb_add(ax25_cb *ax25)
-{
- spin_lock_bh(&ax25_list_lock);
- ax25_cb_hold(ax25);
- hlist_add_head(&ax25->ax25_node, &ax25_list);
- spin_unlock_bh(&ax25_list_lock);
-}
-
-/*
- * Find a socket that wants to accept the SABM we have just
- * received.
- */
-struct sock *ax25_find_listener(ax25_address *addr, int digi,
- struct net_device *dev, int type)
-{
- ax25_cb *s;
-
- spin_lock(&ax25_list_lock);
- ax25_for_each(s, &ax25_list) {
- if ((s->iamdigi && !digi) || (!s->iamdigi && digi))
- continue;
- if (s->sk && !ax25cmp(&s->source_addr, addr) &&
- s->sk->sk_type == type && s->sk->sk_state == TCP_LISTEN) {
- /* If device is null we match any device */
- if (s->ax25_dev == NULL || s->ax25_dev->dev == dev) {
- sock_hold(s->sk);
- spin_unlock(&ax25_list_lock);
- return s->sk;
- }
- }
- }
- spin_unlock(&ax25_list_lock);
-
- return NULL;
-}
-
-/*
- * Find an AX.25 socket given both ends.
- */
-struct sock *ax25_get_socket(ax25_address *my_addr, ax25_address *dest_addr,
- int type)
-{
- struct sock *sk = NULL;
- ax25_cb *s;
-
- spin_lock(&ax25_list_lock);
- ax25_for_each(s, &ax25_list) {
- if (s->sk && !ax25cmp(&s->source_addr, my_addr) &&
- !ax25cmp(&s->dest_addr, dest_addr) &&
- s->sk->sk_type == type) {
- sk = s->sk;
- sock_hold(sk);
- break;
- }
- }
-
- spin_unlock(&ax25_list_lock);
-
- return sk;
-}
-
-/*
- * Find an AX.25 control block given both ends. It will only pick up
- * floating AX.25 control blocks or non Raw socket bound control blocks.
- */
-ax25_cb *ax25_find_cb(const ax25_address *src_addr, ax25_address *dest_addr,
- ax25_digi *digi, struct net_device *dev)
-{
- ax25_cb *s;
-
- spin_lock_bh(&ax25_list_lock);
- ax25_for_each(s, &ax25_list) {
- if (s->sk && s->sk->sk_type != SOCK_SEQPACKET)
- continue;
- if (s->ax25_dev == NULL)
- continue;
- if (ax25cmp(&s->source_addr, src_addr) == 0 && ax25cmp(&s->dest_addr, dest_addr) == 0 && s->ax25_dev->dev == dev) {
- if (digi != NULL && digi->ndigi != 0) {
- if (s->digipeat == NULL)
- continue;
- if (ax25digicmp(s->digipeat, digi) != 0)
- continue;
- } else {
- if (s->digipeat != NULL && s->digipeat->ndigi != 0)
- continue;
- }
- ax25_cb_hold(s);
- spin_unlock_bh(&ax25_list_lock);
-
- return s;
- }
- }
- spin_unlock_bh(&ax25_list_lock);
-
- return NULL;
-}
-
-EXPORT_SYMBOL(ax25_find_cb);
-
-void ax25_send_to_raw(ax25_address *addr, struct sk_buff *skb, int proto)
-{
- ax25_cb *s;
- struct sk_buff *copy;
-
- spin_lock(&ax25_list_lock);
- ax25_for_each(s, &ax25_list) {
- if (s->sk != NULL && ax25cmp(&s->source_addr, addr) == 0 &&
- s->sk->sk_type == SOCK_RAW &&
- s->sk->sk_protocol == proto &&
- s->ax25_dev->dev == skb->dev &&
- atomic_read(&s->sk->sk_rmem_alloc) <= s->sk->sk_rcvbuf) {
- if ((copy = skb_clone(skb, GFP_ATOMIC)) == NULL)
- continue;
- if (sock_queue_rcv_skb(s->sk, copy) != 0)
- kfree_skb(copy);
- }
- }
- spin_unlock(&ax25_list_lock);
-}
-
-/*
- * Deferred destroy.
- */
-void ax25_destroy_socket(ax25_cb *);
-
-/*
- * Handler for deferred kills.
- */
-static void ax25_destroy_timer(struct timer_list *t)
-{
- ax25_cb *ax25 = timer_container_of(ax25, t, dtimer);
- struct sock *sk;
-
- sk=ax25->sk;
-
- bh_lock_sock(sk);
- sock_hold(sk);
- ax25_destroy_socket(ax25);
- bh_unlock_sock(sk);
- sock_put(sk);
-}
-
-/*
- * This is called from user mode and the timers. Thus it protects itself
- * against interrupt users but doesn't worry about being called during
- * work. Once it is removed from the queue no interrupt or bottom half
- * will touch it and we are (fairly 8-) ) safe.
- */
-void ax25_destroy_socket(ax25_cb *ax25)
-{
- struct sk_buff *skb;
-
- ax25_cb_del(ax25);
-
- ax25_stop_heartbeat(ax25);
- ax25_stop_t1timer(ax25);
- ax25_stop_t2timer(ax25);
- ax25_stop_t3timer(ax25);
- ax25_stop_idletimer(ax25);
-
- ax25_clear_queues(ax25); /* Flush the queues */
-
- if (ax25->sk != NULL) {
- while ((skb = skb_dequeue(&ax25->sk->sk_receive_queue)) != NULL) {
- if (skb->sk != ax25->sk) {
- /* A pending connection */
- ax25_cb *sax25 = sk_to_ax25(skb->sk);
-
- /* Queue the unaccepted socket for death */
- sock_orphan(skb->sk);
-
- /* 9A4GL: hack to release unaccepted sockets */
- skb->sk->sk_state = TCP_LISTEN;
-
- ax25_start_heartbeat(sax25);
- sax25->state = AX25_STATE_0;
- }
-
- kfree_skb(skb);
- }
- skb_queue_purge(&ax25->sk->sk_write_queue);
- }
-
- if (ax25->sk != NULL) {
- if (sk_has_allocations(ax25->sk)) {
- /* Defer: outstanding buffers */
- timer_setup(&ax25->dtimer, ax25_destroy_timer, 0);
- ax25->dtimer.expires = jiffies + 2 * HZ;
- add_timer(&ax25->dtimer);
- } else {
- struct sock *sk=ax25->sk;
- ax25->sk=NULL;
- sock_put(sk);
- }
- } else {
- ax25_cb_put(ax25);
- }
-}
-
-/*
- * dl1bke 960311: set parameters for existing AX.25 connections,
- * includes a KILL command to abort any connection.
- * VERY useful for debugging ;-)
- */
-static int ax25_ctl_ioctl(const unsigned int cmd, void __user *arg)
-{
- struct ax25_ctl_struct ax25_ctl;
- ax25_digi digi;
- ax25_dev *ax25_dev;
- ax25_cb *ax25;
- unsigned int k;
- int ret = 0;
-
- if (copy_from_user(&ax25_ctl, arg, sizeof(ax25_ctl)))
- return -EFAULT;
-
- if (ax25_ctl.digi_count > AX25_MAX_DIGIS)
- return -EINVAL;
-
- if (ax25_ctl.arg > ULONG_MAX / HZ && ax25_ctl.cmd != AX25_KILL)
- return -EINVAL;
-
- ax25_dev = ax25_addr_ax25dev(&ax25_ctl.port_addr);
- if (!ax25_dev)
- return -ENODEV;
-
- digi.ndigi = ax25_ctl.digi_count;
- for (k = 0; k < digi.ndigi; k++)
- digi.calls[k] = ax25_ctl.digi_addr[k];
-
- ax25 = ax25_find_cb(&ax25_ctl.source_addr, &ax25_ctl.dest_addr, &digi, ax25_dev->dev);
- if (!ax25) {
- ax25_dev_put(ax25_dev);
- return -ENOTCONN;
- }
-
- switch (ax25_ctl.cmd) {
- case AX25_KILL:
- ax25_send_control(ax25, AX25_DISC, AX25_POLLON, AX25_COMMAND);
-#ifdef CONFIG_AX25_DAMA_SLAVE
- if (ax25_dev->dama.slave && ax25->ax25_dev->values[AX25_VALUES_PROTOCOL] == AX25_PROTO_DAMA_SLAVE)
- ax25_dama_off(ax25);
-#endif
- ax25_disconnect(ax25, ENETRESET);
- break;
-
- case AX25_WINDOW:
- if (ax25->modulus == AX25_MODULUS) {
- if (ax25_ctl.arg < 1 || ax25_ctl.arg > 7)
- goto einval_put;
- } else {
- if (ax25_ctl.arg < 1 || ax25_ctl.arg > 63)
- goto einval_put;
- }
- ax25->window = ax25_ctl.arg;
- break;
-
- case AX25_T1:
- if (ax25_ctl.arg < 1 || ax25_ctl.arg > ULONG_MAX / HZ)
- goto einval_put;
- ax25->rtt = (ax25_ctl.arg * HZ) / 2;
- ax25->t1 = ax25_ctl.arg * HZ;
- break;
-
- case AX25_T2:
- if (ax25_ctl.arg < 1 || ax25_ctl.arg > ULONG_MAX / HZ)
- goto einval_put;
- ax25->t2 = ax25_ctl.arg * HZ;
- break;
-
- case AX25_N2:
- if (ax25_ctl.arg < 1 || ax25_ctl.arg > 31)
- goto einval_put;
- ax25->n2count = 0;
- ax25->n2 = ax25_ctl.arg;
- break;
-
- case AX25_T3:
- if (ax25_ctl.arg > ULONG_MAX / HZ)
- goto einval_put;
- ax25->t3 = ax25_ctl.arg * HZ;
- break;
-
- case AX25_IDLE:
- if (ax25_ctl.arg > ULONG_MAX / (60 * HZ))
- goto einval_put;
-
- ax25->idle = ax25_ctl.arg * 60 * HZ;
- break;
-
- case AX25_PACLEN:
- if (ax25_ctl.arg < 16 || ax25_ctl.arg > 65535)
- goto einval_put;
- ax25->paclen = ax25_ctl.arg;
- break;
-
- default:
- goto einval_put;
- }
-
-out_put:
- ax25_dev_put(ax25_dev);
- ax25_cb_put(ax25);
- return ret;
-
-einval_put:
- ret = -EINVAL;
- goto out_put;
-}
-
-static void ax25_fillin_cb_from_dev(ax25_cb *ax25, const ax25_dev *ax25_dev)
-{
- ax25->rtt = msecs_to_jiffies(ax25_dev->values[AX25_VALUES_T1]) / 2;
- ax25->t1 = msecs_to_jiffies(ax25_dev->values[AX25_VALUES_T1]);
- ax25->t2 = msecs_to_jiffies(ax25_dev->values[AX25_VALUES_T2]);
- ax25->t3 = msecs_to_jiffies(ax25_dev->values[AX25_VALUES_T3]);
- ax25->n2 = ax25_dev->values[AX25_VALUES_N2];
- ax25->paclen = ax25_dev->values[AX25_VALUES_PACLEN];
- ax25->idle = msecs_to_jiffies(ax25_dev->values[AX25_VALUES_IDLE]);
- ax25->backoff = ax25_dev->values[AX25_VALUES_BACKOFF];
-
- if (ax25_dev->values[AX25_VALUES_AXDEFMODE]) {
- ax25->modulus = AX25_EMODULUS;
- ax25->window = ax25_dev->values[AX25_VALUES_EWINDOW];
- } else {
- ax25->modulus = AX25_MODULUS;
- ax25->window = ax25_dev->values[AX25_VALUES_WINDOW];
- }
-}
-
-/*
- * Fill in a created AX.25 created control block with the default
- * values for a particular device.
- */
-void ax25_fillin_cb(ax25_cb *ax25, ax25_dev *ax25_dev)
-{
- ax25->ax25_dev = ax25_dev;
-
- if (ax25->ax25_dev != NULL) {
- ax25_fillin_cb_from_dev(ax25, ax25_dev);
- return;
- }
-
- /*
- * No device, use kernel / AX.25 spec default values
- */
- ax25->rtt = msecs_to_jiffies(AX25_DEF_T1) / 2;
- ax25->t1 = msecs_to_jiffies(AX25_DEF_T1);
- ax25->t2 = msecs_to_jiffies(AX25_DEF_T2);
- ax25->t3 = msecs_to_jiffies(AX25_DEF_T3);
- ax25->n2 = AX25_DEF_N2;
- ax25->paclen = AX25_DEF_PACLEN;
- ax25->idle = msecs_to_jiffies(AX25_DEF_IDLE);
- ax25->backoff = AX25_DEF_BACKOFF;
-
- if (AX25_DEF_AXDEFMODE) {
- ax25->modulus = AX25_EMODULUS;
- ax25->window = AX25_DEF_EWINDOW;
- } else {
- ax25->modulus = AX25_MODULUS;
- ax25->window = AX25_DEF_WINDOW;
- }
-}
-
-/*
- * Create an empty AX.25 control block.
- */
-ax25_cb *ax25_create_cb(void)
-{
- ax25_cb *ax25;
-
- if ((ax25 = kzalloc_obj(*ax25, GFP_ATOMIC)) == NULL)
- return NULL;
-
- refcount_set(&ax25->refcount, 1);
-
- skb_queue_head_init(&ax25->write_queue);
- skb_queue_head_init(&ax25->frag_queue);
- skb_queue_head_init(&ax25->ack_queue);
- skb_queue_head_init(&ax25->reseq_queue);
-
- ax25_setup_timers(ax25);
-
- ax25_fillin_cb(ax25, NULL);
-
- ax25->state = AX25_STATE_0;
-
- return ax25;
-}
-
-/*
- * Handling for system calls applied via the various interfaces to an
- * AX25 socket object
- */
-
-static int ax25_setsockopt(struct socket *sock, int level, int optname,
- sockptr_t optval, unsigned int optlen)
-{
- struct sock *sk = sock->sk;
- ax25_cb *ax25;
- struct net_device *dev;
- char devname[IFNAMSIZ];
- unsigned int opt;
- int res = 0;
-
- if (level != SOL_AX25)
- return -ENOPROTOOPT;
-
- if (optlen < sizeof(unsigned int))
- return -EINVAL;
-
- if (copy_from_sockptr(&opt, optval, sizeof(unsigned int)))
- return -EFAULT;
-
- lock_sock(sk);
- ax25 = sk_to_ax25(sk);
-
- switch (optname) {
- case AX25_WINDOW:
- if (ax25->modulus == AX25_MODULUS) {
- if (opt < 1 || opt > 7) {
- res = -EINVAL;
- break;
- }
- } else {
- if (opt < 1 || opt > 63) {
- res = -EINVAL;
- break;
- }
- }
- ax25->window = opt;
- break;
-
- case AX25_T1:
- if (opt < 1 || opt > UINT_MAX / HZ) {
- res = -EINVAL;
- break;
- }
- ax25->rtt = (opt * HZ) >> 1;
- ax25->t1 = opt * HZ;
- break;
-
- case AX25_T2:
- if (opt < 1 || opt > UINT_MAX / HZ) {
- res = -EINVAL;
- break;
- }
- ax25->t2 = opt * HZ;
- break;
-
- case AX25_N2:
- if (opt < 1 || opt > 31) {
- res = -EINVAL;
- break;
- }
- ax25->n2 = opt;
- break;
-
- case AX25_T3:
- if (opt < 1 || opt > UINT_MAX / HZ) {
- res = -EINVAL;
- break;
- }
- ax25->t3 = opt * HZ;
- break;
-
- case AX25_IDLE:
- if (opt > UINT_MAX / (60 * HZ)) {
- res = -EINVAL;
- break;
- }
- ax25->idle = opt * 60 * HZ;
- break;
-
- case AX25_BACKOFF:
- if (opt > 2) {
- res = -EINVAL;
- break;
- }
- ax25->backoff = opt;
- break;
-
- case AX25_EXTSEQ:
- ax25->modulus = opt ? AX25_EMODULUS : AX25_MODULUS;
- break;
-
- case AX25_PIDINCL:
- ax25->pidincl = opt ? 1 : 0;
- break;
-
- case AX25_IAMDIGI:
- ax25->iamdigi = opt ? 1 : 0;
- break;
-
- case AX25_PACLEN:
- if (opt < 16 || opt > 65535) {
- res = -EINVAL;
- break;
- }
- ax25->paclen = opt;
- break;
-
- case SO_BINDTODEVICE:
- if (optlen > IFNAMSIZ - 1)
- optlen = IFNAMSIZ - 1;
-
- memset(devname, 0, sizeof(devname));
-
- if (copy_from_sockptr(devname, optval, optlen)) {
- res = -EFAULT;
- break;
- }
-
- if (sk->sk_type == SOCK_SEQPACKET &&
- (sock->state != SS_UNCONNECTED ||
- sk->sk_state == TCP_LISTEN)) {
- res = -EADDRNOTAVAIL;
- break;
- }
-
- rcu_read_lock();
- dev = dev_get_by_name_rcu(&init_net, devname);
- if (!dev) {
- rcu_read_unlock();
- res = -ENODEV;
- break;
- }
-
- if (ax25->ax25_dev) {
- if (dev == ax25->ax25_dev->dev) {
- rcu_read_unlock();
- break;
- }
- netdev_put(ax25->ax25_dev->dev, &ax25->dev_tracker);
- ax25_dev_put(ax25->ax25_dev);
- }
-
- ax25->ax25_dev = ax25_dev_ax25dev(dev);
- if (!ax25->ax25_dev) {
- rcu_read_unlock();
- res = -ENODEV;
- break;
- }
- ax25_fillin_cb(ax25, ax25->ax25_dev);
- netdev_hold(dev, &ax25->dev_tracker, GFP_ATOMIC);
- ax25_dev_hold(ax25->ax25_dev);
- rcu_read_unlock();
- break;
-
- default:
- res = -ENOPROTOOPT;
- }
- release_sock(sk);
-
- return res;
-}
-
-static int ax25_getsockopt(struct socket *sock, int level, int optname,
- char __user *optval, int __user *optlen)
-{
- struct sock *sk = sock->sk;
- ax25_cb *ax25;
- struct ax25_dev *ax25_dev;
- char devname[IFNAMSIZ];
- void *valptr;
- int val = 0;
- int maxlen, length;
-
- if (level != SOL_AX25)
- return -ENOPROTOOPT;
-
- if (get_user(maxlen, optlen))
- return -EFAULT;
-
- if (maxlen < 1)
- return -EFAULT;
-
- valptr = &val;
- length = min_t(unsigned int, maxlen, sizeof(int));
-
- lock_sock(sk);
- ax25 = sk_to_ax25(sk);
-
- switch (optname) {
- case AX25_WINDOW:
- val = ax25->window;
- break;
-
- case AX25_T1:
- val = ax25->t1 / HZ;
- break;
-
- case AX25_T2:
- val = ax25->t2 / HZ;
- break;
-
- case AX25_N2:
- val = ax25->n2;
- break;
-
- case AX25_T3:
- val = ax25->t3 / HZ;
- break;
-
- case AX25_IDLE:
- val = ax25->idle / (60 * HZ);
- break;
-
- case AX25_BACKOFF:
- val = ax25->backoff;
- break;
-
- case AX25_EXTSEQ:
- val = (ax25->modulus == AX25_EMODULUS);
- break;
-
- case AX25_PIDINCL:
- val = ax25->pidincl;
- break;
-
- case AX25_IAMDIGI:
- val = ax25->iamdigi;
- break;
-
- case AX25_PACLEN:
- val = ax25->paclen;
- break;
-
- case SO_BINDTODEVICE:
- ax25_dev = ax25->ax25_dev;
-
- if (ax25_dev != NULL && ax25_dev->dev != NULL) {
- strscpy(devname, ax25_dev->dev->name, sizeof(devname));
- length = strlen(devname) + 1;
- } else {
- *devname = '\0';
- length = 1;
- }
-
- valptr = devname;
- break;
-
- default:
- release_sock(sk);
- return -ENOPROTOOPT;
- }
- release_sock(sk);
-
- if (put_user(length, optlen))
- return -EFAULT;
-
- return copy_to_user(optval, valptr, length) ? -EFAULT : 0;
-}
-
-static int ax25_listen(struct socket *sock, int backlog)
-{
- struct sock *sk = sock->sk;
- int res = 0;
-
- lock_sock(sk);
- if (sk->sk_type == SOCK_SEQPACKET && sk->sk_state != TCP_LISTEN) {
- sk->sk_max_ack_backlog = backlog;
- sk->sk_state = TCP_LISTEN;
- goto out;
- }
- res = -EOPNOTSUPP;
-
-out:
- release_sock(sk);
-
- return res;
-}
-
-/*
- * XXX: when creating ax25_sock we should update the .obj_size setting
- * below.
- */
-static struct proto ax25_proto = {
- .name = "AX25",
- .owner = THIS_MODULE,
- .obj_size = sizeof(struct ax25_sock),
-};
-
-static int ax25_create(struct net *net, struct socket *sock, int protocol,
- int kern)
-{
- struct sock *sk;
- ax25_cb *ax25;
-
- if (protocol < 0 || protocol > U8_MAX)
- return -EINVAL;
-
- if (!net_eq(net, &init_net))
- return -EAFNOSUPPORT;
-
- switch (sock->type) {
- case SOCK_DGRAM:
- if (protocol == 0 || protocol == PF_AX25)
- protocol = AX25_P_TEXT;
- break;
-
- case SOCK_SEQPACKET:
- switch (protocol) {
- case 0:
- case PF_AX25: /* For CLX */
- protocol = AX25_P_TEXT;
- break;
- case AX25_P_SEGMENT:
-#ifdef CONFIG_INET
- case AX25_P_ARP:
- case AX25_P_IP:
-#endif
-#ifdef CONFIG_NETROM
- case AX25_P_NETROM:
-#endif
-#ifdef CONFIG_ROSE
- case AX25_P_ROSE:
-#endif
- return -ESOCKTNOSUPPORT;
-#ifdef CONFIG_NETROM_MODULE
- case AX25_P_NETROM:
- if (ax25_protocol_is_registered(AX25_P_NETROM))
- return -ESOCKTNOSUPPORT;
- break;
-#endif
-#ifdef CONFIG_ROSE_MODULE
- case AX25_P_ROSE:
- if (ax25_protocol_is_registered(AX25_P_ROSE))
- return -ESOCKTNOSUPPORT;
- break;
-#endif
- default:
- break;
- }
- break;
-
- case SOCK_RAW:
- if (!capable(CAP_NET_RAW))
- return -EPERM;
- break;
- default:
- return -ESOCKTNOSUPPORT;
- }
-
- sk = sk_alloc(net, PF_AX25, GFP_ATOMIC, &ax25_proto, kern);
- if (sk == NULL)
- return -ENOMEM;
-
- ax25 = ax25_sk(sk)->cb = ax25_create_cb();
- if (!ax25) {
- sk_free(sk);
- return -ENOMEM;
- }
-
- sock_init_data(sock, sk);
-
- sk->sk_destruct = ax25_free_sock;
- sock->ops = &ax25_proto_ops;
- sk->sk_protocol = protocol;
-
- ax25->sk = sk;
-
- return 0;
-}
-
-struct sock *ax25_make_new(struct sock *osk, struct ax25_dev *ax25_dev)
-{
- struct sock *sk;
- ax25_cb *ax25, *oax25;
-
- sk = sk_alloc(sock_net(osk), PF_AX25, GFP_ATOMIC, osk->sk_prot, 0);
- if (sk == NULL)
- return NULL;
-
- if ((ax25 = ax25_create_cb()) == NULL) {
- sk_free(sk);
- return NULL;
- }
-
- switch (osk->sk_type) {
- case SOCK_DGRAM:
- break;
- case SOCK_SEQPACKET:
- break;
- default:
- sk_free(sk);
- ax25_cb_put(ax25);
- return NULL;
- }
-
- sock_init_data(NULL, sk);
-
- sk->sk_type = osk->sk_type;
- sk->sk_priority = READ_ONCE(osk->sk_priority);
- sk->sk_protocol = osk->sk_protocol;
- sk->sk_rcvbuf = osk->sk_rcvbuf;
- sk->sk_sndbuf = osk->sk_sndbuf;
- sk->sk_state = TCP_ESTABLISHED;
- sock_copy_flags(sk, osk);
-
- oax25 = sk_to_ax25(osk);
-
- ax25->modulus = oax25->modulus;
- ax25->backoff = oax25->backoff;
- ax25->pidincl = oax25->pidincl;
- ax25->iamdigi = oax25->iamdigi;
- ax25->rtt = oax25->rtt;
- ax25->t1 = oax25->t1;
- ax25->t2 = oax25->t2;
- ax25->t3 = oax25->t3;
- ax25->n2 = oax25->n2;
- ax25->idle = oax25->idle;
- ax25->paclen = oax25->paclen;
- ax25->window = oax25->window;
-
- ax25->ax25_dev = ax25_dev;
- ax25->source_addr = oax25->source_addr;
-
- if (oax25->digipeat != NULL) {
- ax25->digipeat = kmemdup(oax25->digipeat, sizeof(ax25_digi),
- GFP_ATOMIC);
- if (ax25->digipeat == NULL) {
- sk_free(sk);
- ax25_cb_put(ax25);
- return NULL;
- }
- }
-
- ax25_sk(sk)->cb = ax25;
- sk->sk_destruct = ax25_free_sock;
- ax25->sk = sk;
-
- return sk;
-}
-
-static int ax25_release(struct socket *sock)
-{
- struct sock *sk = sock->sk;
- ax25_cb *ax25;
- ax25_dev *ax25_dev;
-
- if (sk == NULL)
- return 0;
-
- sock_hold(sk);
- lock_sock(sk);
- sock_orphan(sk);
- ax25 = sk_to_ax25(sk);
- ax25_dev = ax25->ax25_dev;
-
- if (sk->sk_type == SOCK_SEQPACKET) {
- switch (ax25->state) {
- case AX25_STATE_0:
- if (!sock_flag(ax25->sk, SOCK_DEAD)) {
- release_sock(sk);
- ax25_disconnect(ax25, 0);
- lock_sock(sk);
- }
- ax25_destroy_socket(ax25);
- break;
-
- case AX25_STATE_1:
- case AX25_STATE_2:
- ax25_send_control(ax25, AX25_DISC, AX25_POLLON, AX25_COMMAND);
- release_sock(sk);
- ax25_disconnect(ax25, 0);
- lock_sock(sk);
- if (!sock_flag(ax25->sk, SOCK_DESTROY))
- ax25_destroy_socket(ax25);
- break;
-
- case AX25_STATE_3:
- case AX25_STATE_4:
- ax25_clear_queues(ax25);
- ax25->n2count = 0;
-
- switch (ax25->ax25_dev->values[AX25_VALUES_PROTOCOL]) {
- case AX25_PROTO_STD_SIMPLEX:
- case AX25_PROTO_STD_DUPLEX:
- ax25_send_control(ax25,
- AX25_DISC,
- AX25_POLLON,
- AX25_COMMAND);
- ax25_stop_t2timer(ax25);
- ax25_stop_t3timer(ax25);
- ax25_stop_idletimer(ax25);
- break;
-#ifdef CONFIG_AX25_DAMA_SLAVE
- case AX25_PROTO_DAMA_SLAVE:
- ax25_stop_t3timer(ax25);
- ax25_stop_idletimer(ax25);
- break;
-#endif
- }
- ax25_calculate_t1(ax25);
- ax25_start_t1timer(ax25);
- ax25->state = AX25_STATE_2;
- sk->sk_state = TCP_CLOSE;
- sk->sk_shutdown |= SEND_SHUTDOWN;
- sk->sk_state_change(sk);
- sock_set_flag(sk, SOCK_DESTROY);
- break;
-
- default:
- break;
- }
- } else {
- sk->sk_state = TCP_CLOSE;
- sk->sk_shutdown |= SEND_SHUTDOWN;
- sk->sk_state_change(sk);
- ax25_destroy_socket(ax25);
- }
- if (ax25_dev) {
- if (!ax25_dev->device_up) {
- timer_delete_sync(&ax25->timer);
- timer_delete_sync(&ax25->t1timer);
- timer_delete_sync(&ax25->t2timer);
- timer_delete_sync(&ax25->t3timer);
- timer_delete_sync(&ax25->idletimer);
- }
- netdev_put(ax25_dev->dev, &ax25->dev_tracker);
- ax25_dev_put(ax25_dev);
- }
-
- sock->sk = NULL;
- release_sock(sk);
- sock_put(sk);
-
- return 0;
-}
-
-/*
- * We support a funny extension here so you can (as root) give any callsign
- * digipeated via a local address as source. This hack is obsolete now
- * that we've implemented support for SO_BINDTODEVICE. It is however small
- * and trivially backward compatible.
- */
-static int ax25_bind(struct socket *sock, struct sockaddr_unsized *uaddr, int addr_len)
-{
- struct sock *sk = sock->sk;
- struct full_sockaddr_ax25 *addr = (struct full_sockaddr_ax25 *)uaddr;
- ax25_dev *ax25_dev = NULL;
- ax25_uid_assoc *user;
- ax25_address call;
- ax25_cb *ax25;
- int err = 0;
-
- if (addr_len != sizeof(struct sockaddr_ax25) &&
- addr_len != sizeof(struct full_sockaddr_ax25))
- /* support for old structure may go away some time
- * ax25_bind(): uses old (6 digipeater) socket structure.
- */
- if ((addr_len < sizeof(struct sockaddr_ax25) + sizeof(ax25_address) * 6) ||
- (addr_len > sizeof(struct full_sockaddr_ax25)))
- return -EINVAL;
-
- if (addr->fsa_ax25.sax25_family != AF_AX25)
- return -EINVAL;
-
- user = ax25_findbyuid(current_euid());
- if (user) {
- call = user->call;
- ax25_uid_put(user);
- } else {
- if (ax25_uid_policy && !capable(CAP_NET_ADMIN))
- return -EACCES;
-
- call = addr->fsa_ax25.sax25_call;
- }
-
- lock_sock(sk);
-
- ax25 = sk_to_ax25(sk);
- if (!sock_flag(sk, SOCK_ZAPPED)) {
- err = -EINVAL;
- goto out;
- }
-
- ax25->source_addr = call;
-
- /*
- * User already set interface with SO_BINDTODEVICE
- */
- if (ax25->ax25_dev != NULL)
- goto done;
-
- if (addr_len > sizeof(struct sockaddr_ax25) && addr->fsa_ax25.sax25_ndigis == 1) {
- if (ax25cmp(&addr->fsa_digipeater[0], &null_ax25_address) != 0 &&
- (ax25_dev = ax25_addr_ax25dev(&addr->fsa_digipeater[0])) == NULL) {
- err = -EADDRNOTAVAIL;
- goto out;
- }
- } else {
- if ((ax25_dev = ax25_addr_ax25dev(&addr->fsa_ax25.sax25_call)) == NULL) {
- err = -EADDRNOTAVAIL;
- goto out;
- }
- }
-
- if (ax25_dev) {
- ax25_fillin_cb(ax25, ax25_dev);
- netdev_hold(ax25_dev->dev, &ax25->dev_tracker, GFP_ATOMIC);
- }
-
-done:
- ax25_cb_add(ax25);
- sock_reset_flag(sk, SOCK_ZAPPED);
-
-out:
- release_sock(sk);
-
- return err;
-}
-
-/*
- * FIXME: nonblock behaviour looks like it may have a bug.
- */
-static int __must_check ax25_connect(struct socket *sock,
- struct sockaddr_unsized *uaddr, int addr_len, int flags)
-{
- struct sock *sk = sock->sk;
- ax25_cb *ax25 = sk_to_ax25(sk), *ax25t;
- struct full_sockaddr_ax25 *fsa = (struct full_sockaddr_ax25 *)uaddr;
- ax25_digi *digi = NULL;
- int ct = 0, err = 0;
-
- /*
- * some sanity checks. code further down depends on this
- */
-
- if (addr_len == sizeof(struct sockaddr_ax25))
- /* support for this will go away in early 2.5.x
- * ax25_connect(): uses obsolete socket structure
- */
- ;
- else if (addr_len != sizeof(struct full_sockaddr_ax25))
- /* support for old structure may go away some time
- * ax25_connect(): uses old (6 digipeater) socket structure.
- */
- if ((addr_len < sizeof(struct sockaddr_ax25) + sizeof(ax25_address) * 6) ||
- (addr_len > sizeof(struct full_sockaddr_ax25)))
- return -EINVAL;
-
-
- if (fsa->fsa_ax25.sax25_family != AF_AX25)
- return -EINVAL;
-
- lock_sock(sk);
-
- /* deal with restarts */
- if (sock->state == SS_CONNECTING) {
- switch (sk->sk_state) {
- case TCP_SYN_SENT: /* still trying */
- err = -EINPROGRESS;
- goto out_release;
-
- case TCP_ESTABLISHED: /* connection established */
- sock->state = SS_CONNECTED;
- goto out_release;
-
- case TCP_CLOSE: /* connection refused */
- sock->state = SS_UNCONNECTED;
- err = -ECONNREFUSED;
- goto out_release;
- }
- }
-
- if (sk->sk_state == TCP_ESTABLISHED && sk->sk_type == SOCK_SEQPACKET) {
- err = -EISCONN; /* No reconnect on a seqpacket socket */
- goto out_release;
- }
-
- sk->sk_state = TCP_CLOSE;
- sock->state = SS_UNCONNECTED;
-
- kfree(ax25->digipeat);
- ax25->digipeat = NULL;
-
- /*
- * Handle digi-peaters to be used.
- */
- if (addr_len > sizeof(struct sockaddr_ax25) &&
- fsa->fsa_ax25.sax25_ndigis != 0) {
- /* Valid number of digipeaters ? */
- if (fsa->fsa_ax25.sax25_ndigis < 1 ||
- fsa->fsa_ax25.sax25_ndigis > AX25_MAX_DIGIS ||
- addr_len < sizeof(struct sockaddr_ax25) +
- sizeof(ax25_address) * fsa->fsa_ax25.sax25_ndigis) {
- err = -EINVAL;
- goto out_release;
- }
-
- if ((digi = kmalloc_obj(ax25_digi)) == NULL) {
- err = -ENOBUFS;
- goto out_release;
- }
-
- digi->ndigi = fsa->fsa_ax25.sax25_ndigis;
- digi->lastrepeat = -1;
-
- while (ct < fsa->fsa_ax25.sax25_ndigis) {
- if ((fsa->fsa_digipeater[ct].ax25_call[6] &
- AX25_HBIT) && ax25->iamdigi) {
- digi->repeated[ct] = 1;
- digi->lastrepeat = ct;
- } else {
- digi->repeated[ct] = 0;
- }
- digi->calls[ct] = fsa->fsa_digipeater[ct];
- ct++;
- }
- }
-
- /* Must bind first - autobinding does not work. */
- if (sock_flag(sk, SOCK_ZAPPED)) {
- kfree(digi);
- err = -EINVAL;
- goto out_release;
- }
-
- /* Check to see if the device has been filled in, error if it hasn't. */
- if (ax25->ax25_dev == NULL) {
- kfree(digi);
- err = -EHOSTUNREACH;
- goto out_release;
- }
-
- if (sk->sk_type == SOCK_SEQPACKET &&
- (ax25t=ax25_find_cb(&ax25->source_addr, &fsa->fsa_ax25.sax25_call, digi,
- ax25->ax25_dev->dev))) {
- kfree(digi);
- err = -EADDRINUSE; /* Already such a connection */
- ax25_cb_put(ax25t);
- goto out_release;
- }
-
- ax25->dest_addr = fsa->fsa_ax25.sax25_call;
- ax25->digipeat = digi;
-
- /* First the easy one */
- if (sk->sk_type != SOCK_SEQPACKET) {
- sock->state = SS_CONNECTED;
- sk->sk_state = TCP_ESTABLISHED;
- goto out_release;
- }
-
- /* Move to connecting socket, ax.25 lapb WAIT_UA.. */
- sock->state = SS_CONNECTING;
- sk->sk_state = TCP_SYN_SENT;
-
- switch (ax25->ax25_dev->values[AX25_VALUES_PROTOCOL]) {
- case AX25_PROTO_STD_SIMPLEX:
- case AX25_PROTO_STD_DUPLEX:
- ax25_std_establish_data_link(ax25);
- break;
-
-#ifdef CONFIG_AX25_DAMA_SLAVE
- case AX25_PROTO_DAMA_SLAVE:
- ax25->modulus = AX25_MODULUS;
- ax25->window = ax25->ax25_dev->values[AX25_VALUES_WINDOW];
- if (ax25->ax25_dev->dama.slave)
- ax25_ds_establish_data_link(ax25);
- else
- ax25_std_establish_data_link(ax25);
- break;
-#endif
- }
-
- ax25->state = AX25_STATE_1;
-
- ax25_start_heartbeat(ax25);
-
- /* Now the loop */
- if (sk->sk_state != TCP_ESTABLISHED && (flags & O_NONBLOCK)) {
- err = -EINPROGRESS;
- goto out_release;
- }
-
- if (sk->sk_state == TCP_SYN_SENT) {
- DEFINE_WAIT(wait);
-
- for (;;) {
- prepare_to_wait(sk_sleep(sk), &wait,
- TASK_INTERRUPTIBLE);
- if (sk->sk_state != TCP_SYN_SENT)
- break;
- if (!signal_pending(current)) {
- release_sock(sk);
- schedule();
- lock_sock(sk);
- continue;
- }
- err = -ERESTARTSYS;
- break;
- }
- finish_wait(sk_sleep(sk), &wait);
-
- if (err)
- goto out_release;
- }
-
- if (sk->sk_state != TCP_ESTABLISHED) {
- /* Not in ABM, not in WAIT_UA -> failed */
- sock->state = SS_UNCONNECTED;
- err = sock_error(sk); /* Always set at this point */
- goto out_release;
- }
-
- sock->state = SS_CONNECTED;
-
- err = 0;
-out_release:
- release_sock(sk);
-
- return err;
-}
-
-static int ax25_accept(struct socket *sock, struct socket *newsock,
- struct proto_accept_arg *arg)
-{
- struct sk_buff *skb;
- struct sock *newsk;
- ax25_dev *ax25_dev;
- DEFINE_WAIT(wait);
- struct sock *sk;
- ax25_cb *ax25;
- int err = 0;
-
- if (sock->state != SS_UNCONNECTED)
- return -EINVAL;
-
- if ((sk = sock->sk) == NULL)
- return -EINVAL;
-
- lock_sock(sk);
- if (sk->sk_type != SOCK_SEQPACKET) {
- err = -EOPNOTSUPP;
- goto out;
- }
-
- if (sk->sk_state != TCP_LISTEN) {
- err = -EINVAL;
- goto out;
- }
-
- /*
- * The read queue this time is holding sockets ready to use
- * hooked into the SABM we saved
- */
- for (;;) {
- prepare_to_wait(sk_sleep(sk), &wait, TASK_INTERRUPTIBLE);
- skb = skb_dequeue(&sk->sk_receive_queue);
- if (skb)
- break;
-
- if (arg->flags & O_NONBLOCK) {
- err = -EWOULDBLOCK;
- break;
- }
- if (!signal_pending(current)) {
- release_sock(sk);
- schedule();
- lock_sock(sk);
- continue;
- }
- err = -ERESTARTSYS;
- break;
- }
- finish_wait(sk_sleep(sk), &wait);
-
- if (err)
- goto out;
-
- newsk = skb->sk;
- sock_graft(newsk, newsock);
-
- /* Now attach up the new socket */
- kfree_skb(skb);
- sk_acceptq_removed(sk);
- newsock->state = SS_CONNECTED;
- ax25 = sk_to_ax25(newsk);
- ax25_dev = ax25->ax25_dev;
- netdev_hold(ax25_dev->dev, &ax25->dev_tracker, GFP_ATOMIC);
- ax25_dev_hold(ax25_dev);
-
-out:
- release_sock(sk);
-
- return err;
-}
-
-static int ax25_getname(struct socket *sock, struct sockaddr *uaddr,
- int peer)
-{
- struct full_sockaddr_ax25 *fsa = (struct full_sockaddr_ax25 *)uaddr;
- struct sock *sk = sock->sk;
- unsigned char ndigi, i;
- ax25_cb *ax25;
- int err = 0;
-
- memset(fsa, 0, sizeof(*fsa));
- lock_sock(sk);
- ax25 = sk_to_ax25(sk);
-
- if (peer != 0) {
- if (sk->sk_state != TCP_ESTABLISHED) {
- err = -ENOTCONN;
- goto out;
- }
-
- fsa->fsa_ax25.sax25_family = AF_AX25;
- fsa->fsa_ax25.sax25_call = ax25->dest_addr;
-
- if (ax25->digipeat != NULL) {
- ndigi = ax25->digipeat->ndigi;
- fsa->fsa_ax25.sax25_ndigis = ndigi;
- for (i = 0; i < ndigi; i++)
- fsa->fsa_digipeater[i] =
- ax25->digipeat->calls[i];
- }
- } else {
- fsa->fsa_ax25.sax25_family = AF_AX25;
- fsa->fsa_ax25.sax25_call = ax25->source_addr;
- fsa->fsa_ax25.sax25_ndigis = 1;
- if (ax25->ax25_dev != NULL) {
- memcpy(&fsa->fsa_digipeater[0],
- ax25->ax25_dev->dev->dev_addr, AX25_ADDR_LEN);
- } else {
- fsa->fsa_digipeater[0] = null_ax25_address;
- }
- }
- err = sizeof (struct full_sockaddr_ax25);
-
-out:
- release_sock(sk);
-
- return err;
-}
-
-static int ax25_sendmsg(struct socket *sock, struct msghdr *msg, size_t len)
-{
- DECLARE_SOCKADDR(struct sockaddr_ax25 *, usax, msg->msg_name);
- struct sock *sk = sock->sk;
- struct sockaddr_ax25 sax;
- struct sk_buff *skb;
- ax25_digi dtmp, *dp;
- ax25_cb *ax25;
- size_t size;
- int lv, err, addr_len = msg->msg_namelen;
-
- if (msg->msg_flags & ~(MSG_DONTWAIT|MSG_EOR|MSG_CMSG_COMPAT))
- return -EINVAL;
-
- lock_sock(sk);
- ax25 = sk_to_ax25(sk);
-
- if (sock_flag(sk, SOCK_ZAPPED)) {
- err = -EADDRNOTAVAIL;
- goto out;
- }
-
- if (sk->sk_shutdown & SEND_SHUTDOWN) {
- send_sig(SIGPIPE, current, 0);
- err = -EPIPE;
- goto out;
- }
-
- if (ax25->ax25_dev == NULL) {
- err = -ENETUNREACH;
- goto out;
- }
-
- if (len > ax25->ax25_dev->dev->mtu) {
- err = -EMSGSIZE;
- goto out;
- }
-
- if (usax != NULL) {
- if (usax->sax25_family != AF_AX25) {
- err = -EINVAL;
- goto out;
- }
-
- if (addr_len == sizeof(struct sockaddr_ax25))
- /* ax25_sendmsg(): uses obsolete socket structure */
- ;
- else if (addr_len != sizeof(struct full_sockaddr_ax25))
- /* support for old structure may go away some time
- * ax25_sendmsg(): uses old (6 digipeater)
- * socket structure.
- */
- if ((addr_len < sizeof(struct sockaddr_ax25) + sizeof(ax25_address) * 6) ||
- (addr_len > sizeof(struct full_sockaddr_ax25))) {
- err = -EINVAL;
- goto out;
- }
-
-
- if (addr_len > sizeof(struct sockaddr_ax25) && usax->sax25_ndigis != 0) {
- int ct = 0;
- struct full_sockaddr_ax25 *fsa = (struct full_sockaddr_ax25 *)usax;
-
- /* Valid number of digipeaters ? */
- if (usax->sax25_ndigis < 1 ||
- usax->sax25_ndigis > AX25_MAX_DIGIS ||
- addr_len < sizeof(struct sockaddr_ax25) +
- sizeof(ax25_address) * usax->sax25_ndigis) {
- err = -EINVAL;
- goto out;
- }
-
- dtmp.ndigi = usax->sax25_ndigis;
-
- while (ct < usax->sax25_ndigis) {
- dtmp.repeated[ct] = 0;
- dtmp.calls[ct] = fsa->fsa_digipeater[ct];
- ct++;
- }
-
- dtmp.lastrepeat = 0;
- }
-
- sax = *usax;
- if (sk->sk_type == SOCK_SEQPACKET &&
- ax25cmp(&ax25->dest_addr, &sax.sax25_call)) {
- err = -EISCONN;
- goto out;
- }
- if (usax->sax25_ndigis == 0)
- dp = NULL;
- else
- dp = &dtmp;
- } else {
- /*
- * FIXME: 1003.1g - if the socket is like this because
- * it has become closed (not started closed) and is VC
- * we ought to SIGPIPE, EPIPE
- */
- if (sk->sk_state != TCP_ESTABLISHED) {
- err = -ENOTCONN;
- goto out;
- }
- sax.sax25_family = AF_AX25;
- sax.sax25_call = ax25->dest_addr;
- dp = ax25->digipeat;
- }
-
- /* Build a packet */
- /* Assume the worst case */
- size = len + ax25->ax25_dev->dev->hard_header_len;
-
- skb = sock_alloc_send_skb(sk, size, msg->msg_flags&MSG_DONTWAIT, &err);
- if (skb == NULL)
- goto out;
-
- skb_reserve(skb, size - len);
-
- /* User data follows immediately after the AX.25 data */
- if (memcpy_from_msg(skb_put(skb, len), msg, len)) {
- err = -EFAULT;
- kfree_skb(skb);
- goto out;
- }
-
- skb_reset_network_header(skb);
-
- /* Add the PID if one is not supplied by the user in the skb */
- if (!ax25->pidincl)
- *(u8 *)skb_push(skb, 1) = sk->sk_protocol;
-
- if (sk->sk_type == SOCK_SEQPACKET) {
- /* Connected mode sockets go via the LAPB machine */
- if (sk->sk_state != TCP_ESTABLISHED) {
- kfree_skb(skb);
- err = -ENOTCONN;
- goto out;
- }
-
- /* Shove it onto the queue and kick */
- ax25_output(ax25, ax25->paclen, skb);
-
- err = len;
- goto out;
- }
-
- skb_push(skb, 1 + ax25_addr_size(dp));
-
- /* Building AX.25 Header */
-
- /* Build an AX.25 header */
- lv = ax25_addr_build(skb->data, &ax25->source_addr, &sax.sax25_call,
- dp, AX25_COMMAND, AX25_MODULUS);
-
- skb_set_transport_header(skb, lv);
-
- *skb_transport_header(skb) = AX25_UI;
-
- /* Datagram frames go straight out of the door as UI */
- ax25_queue_xmit(skb, ax25->ax25_dev->dev);
-
- err = len;
-
-out:
- release_sock(sk);
-
- return err;
-}
-
-static int ax25_recvmsg(struct socket *sock, struct msghdr *msg, size_t size,
- int flags)
-{
- struct sock *sk = sock->sk;
- struct sk_buff *skb, *last;
- struct sk_buff_head *sk_queue;
- int copied;
- int err = 0;
- int off = 0;
- long timeo;
-
- lock_sock(sk);
- /*
- * This works for seqpacket too. The receiver has ordered the
- * queue for us! We do one quick check first though
- */
- if (sk->sk_type == SOCK_SEQPACKET && sk->sk_state != TCP_ESTABLISHED) {
- err = -ENOTCONN;
- goto out;
- }
-
- /* We need support for non-blocking reads. */
- sk_queue = &sk->sk_receive_queue;
- skb = __skb_try_recv_datagram(sk, sk_queue, flags, &off, &err, &last);
- /* If no packet is available, release_sock(sk) and try again. */
- if (!skb) {
- if (err != -EAGAIN)
- goto out;
- release_sock(sk);
- timeo = sock_rcvtimeo(sk, flags & MSG_DONTWAIT);
- while (timeo && !__skb_wait_for_more_packets(sk, sk_queue, &err,
- &timeo, last)) {
- skb = __skb_try_recv_datagram(sk, sk_queue, flags, &off,
- &err, &last);
- if (skb)
- break;
-
- if (err != -EAGAIN)
- goto done;
- }
- if (!skb)
- goto done;
- lock_sock(sk);
- }
-
- if (!sk_to_ax25(sk)->pidincl)
- skb_pull(skb, 1); /* Remove PID */
-
- skb_reset_transport_header(skb);
- copied = skb->len;
-
- if (copied > size) {
- copied = size;
- msg->msg_flags |= MSG_TRUNC;
- }
-
- skb_copy_datagram_msg(skb, 0, msg, copied);
-
- if (msg->msg_name) {
- ax25_digi digi;
- ax25_address src;
- const unsigned char *mac = skb_mac_header(skb);
- DECLARE_SOCKADDR(struct sockaddr_ax25 *, sax, msg->msg_name);
-
- memset(sax, 0, sizeof(struct full_sockaddr_ax25));
- ax25_addr_parse(mac + 1, skb->data - mac - 1, &src, NULL,
- &digi, NULL, NULL);
- sax->sax25_family = AF_AX25;
- /* We set this correctly, even though we may not let the
- application know the digi calls further down (because it
- did NOT ask to know them). This could get political... **/
- sax->sax25_ndigis = digi.ndigi;
- sax->sax25_call = src;
-
- if (sax->sax25_ndigis != 0) {
- int ct;
- struct full_sockaddr_ax25 *fsa = (struct full_sockaddr_ax25 *)sax;
-
- for (ct = 0; ct < digi.ndigi; ct++)
- fsa->fsa_digipeater[ct] = digi.calls[ct];
- }
- msg->msg_namelen = sizeof(struct full_sockaddr_ax25);
- }
-
- skb_free_datagram(sk, skb);
- err = copied;
-
-out:
- release_sock(sk);
-
-done:
- return err;
-}
-
-static int ax25_shutdown(struct socket *sk, int how)
-{
- /* FIXME - generate DM and RNR states */
- return -EOPNOTSUPP;
-}
-
-static int ax25_ioctl(struct socket *sock, unsigned int cmd, unsigned long arg)
-{
- struct sock *sk = sock->sk;
- void __user *argp = (void __user *)arg;
- int res = 0;
-
- lock_sock(sk);
- switch (cmd) {
- case TIOCOUTQ: {
- long amount;
-
- amount = sk->sk_sndbuf - sk_wmem_alloc_get(sk);
- if (amount < 0)
- amount = 0;
- res = put_user(amount, (int __user *)argp);
- break;
- }
-
- case TIOCINQ: {
- struct sk_buff *skb;
- long amount = 0L;
- /* These two are safe on a single CPU system as only user tasks fiddle here */
- if ((skb = skb_peek(&sk->sk_receive_queue)) != NULL)
- amount = skb->len;
- res = put_user(amount, (int __user *) argp);
- break;
- }
-
- case SIOCAX25ADDUID: /* Add a uid to the uid/call map table */
- case SIOCAX25DELUID: /* Delete a uid from the uid/call map table */
- case SIOCAX25GETUID: {
- struct sockaddr_ax25 sax25;
- if (copy_from_user(&sax25, argp, sizeof(sax25))) {
- res = -EFAULT;
- break;
- }
- res = ax25_uid_ioctl(cmd, &sax25);
- break;
- }
-
- case SIOCAX25NOUID: { /* Set the default policy (default/bar) */
- long amount;
- if (!capable(CAP_NET_ADMIN)) {
- res = -EPERM;
- break;
- }
- if (get_user(amount, (long __user *)argp)) {
- res = -EFAULT;
- break;
- }
- if (amount < 0 || amount > AX25_NOUID_BLOCK) {
- res = -EINVAL;
- break;
- }
- ax25_uid_policy = amount;
- res = 0;
- break;
- }
-
- case SIOCADDRT:
- case SIOCDELRT:
- case SIOCAX25OPTRT:
- if (!capable(CAP_NET_ADMIN)) {
- res = -EPERM;
- break;
- }
- res = ax25_rt_ioctl(cmd, argp);
- break;
-
- case SIOCAX25CTLCON:
- if (!capable(CAP_NET_ADMIN)) {
- res = -EPERM;
- break;
- }
- res = ax25_ctl_ioctl(cmd, argp);
- break;
-
- case SIOCAX25GETINFO:
- case SIOCAX25GETINFOOLD: {
- ax25_cb *ax25 = sk_to_ax25(sk);
- struct ax25_info_struct ax25_info;
-
- ax25_info.t1 = ax25->t1 / HZ;
- ax25_info.t2 = ax25->t2 / HZ;
- ax25_info.t3 = ax25->t3 / HZ;
- ax25_info.idle = ax25->idle / (60 * HZ);
- ax25_info.n2 = ax25->n2;
- ax25_info.t1timer = ax25_display_timer(&ax25->t1timer) / HZ;
- ax25_info.t2timer = ax25_display_timer(&ax25->t2timer) / HZ;
- ax25_info.t3timer = ax25_display_timer(&ax25->t3timer) / HZ;
- ax25_info.idletimer = ax25_display_timer(&ax25->idletimer) / (60 * HZ);
- ax25_info.n2count = ax25->n2count;
- ax25_info.state = ax25->state;
- ax25_info.rcv_q = sk_rmem_alloc_get(sk);
- ax25_info.snd_q = sk_wmem_alloc_get(sk);
- ax25_info.vs = ax25->vs;
- ax25_info.vr = ax25->vr;
- ax25_info.va = ax25->va;
- ax25_info.vs_max = ax25->vs; /* reserved */
- ax25_info.paclen = ax25->paclen;
- ax25_info.window = ax25->window;
-
- /* old structure? */
- if (cmd == SIOCAX25GETINFOOLD) {
- static int warned = 0;
- if (!warned) {
- printk(KERN_INFO "%s uses old SIOCAX25GETINFO\n",
- current->comm);
- warned=1;
- }
-
- if (copy_to_user(argp, &ax25_info, sizeof(struct ax25_info_struct_deprecated))) {
- res = -EFAULT;
- break;
- }
- } else {
- if (copy_to_user(argp, &ax25_info, sizeof(struct ax25_info_struct))) {
- res = -EINVAL;
- break;
- }
- }
- res = 0;
- break;
- }
-
- case SIOCAX25ADDFWD:
- case SIOCAX25DELFWD: {
- struct ax25_fwd_struct ax25_fwd;
- if (!capable(CAP_NET_ADMIN)) {
- res = -EPERM;
- break;
- }
- if (copy_from_user(&ax25_fwd, argp, sizeof(ax25_fwd))) {
- res = -EFAULT;
- break;
- }
- res = ax25_fwd_ioctl(cmd, &ax25_fwd);
- break;
- }
-
- case SIOCGIFADDR:
- case SIOCSIFADDR:
- case SIOCGIFDSTADDR:
- case SIOCSIFDSTADDR:
- case SIOCGIFBRDADDR:
- case SIOCSIFBRDADDR:
- case SIOCGIFNETMASK:
- case SIOCSIFNETMASK:
- case SIOCGIFMETRIC:
- case SIOCSIFMETRIC:
- res = -EINVAL;
- break;
-
- default:
- res = -ENOIOCTLCMD;
- break;
- }
- release_sock(sk);
-
- return res;
-}
-
-#ifdef CONFIG_PROC_FS
-
-static void *ax25_info_start(struct seq_file *seq, loff_t *pos)
- __acquires(ax25_list_lock)
-{
- spin_lock_bh(&ax25_list_lock);
- return seq_hlist_start(&ax25_list, *pos);
-}
-
-static void *ax25_info_next(struct seq_file *seq, void *v, loff_t *pos)
-{
- return seq_hlist_next(v, &ax25_list, pos);
-}
-
-static void ax25_info_stop(struct seq_file *seq, void *v)
- __releases(ax25_list_lock)
-{
- spin_unlock_bh(&ax25_list_lock);
-}
-
-static int ax25_info_show(struct seq_file *seq, void *v)
-{
- ax25_cb *ax25 = hlist_entry(v, struct ax25_cb, ax25_node);
- char buf[11];
- int k;
-
-
- /*
- * New format:
- * magic dev src_addr dest_addr,digi1,digi2,.. st vs vr va t1 t1 t2 t2 t3 t3 idle idle n2 n2 rtt window paclen Snd-Q Rcv-Q inode
- */
-
- seq_printf(seq, "%p %s %s%s ",
- ax25,
- ax25->ax25_dev == NULL? "???" : ax25->ax25_dev->dev->name,
- ax2asc(buf, &ax25->source_addr),
- ax25->iamdigi? "*":"");
- seq_printf(seq, "%s", ax2asc(buf, &ax25->dest_addr));
-
- for (k=0; (ax25->digipeat != NULL) && (k < ax25->digipeat->ndigi); k++) {
- seq_printf(seq, ",%s%s",
- ax2asc(buf, &ax25->digipeat->calls[k]),
- ax25->digipeat->repeated[k]? "*":"");
- }
-
- seq_printf(seq, " %d %d %d %d %lu %lu %lu %lu %lu %lu %lu %lu %d %d %lu %d %d",
- ax25->state,
- ax25->vs, ax25->vr, ax25->va,
- ax25_display_timer(&ax25->t1timer) / HZ, ax25->t1 / HZ,
- ax25_display_timer(&ax25->t2timer) / HZ, ax25->t2 / HZ,
- ax25_display_timer(&ax25->t3timer) / HZ, ax25->t3 / HZ,
- ax25_display_timer(&ax25->idletimer) / (60 * HZ),
- ax25->idle / (60 * HZ),
- ax25->n2count, ax25->n2,
- ax25->rtt / HZ,
- ax25->window,
- ax25->paclen);
-
- if (ax25->sk != NULL) {
- seq_printf(seq, " %d %d %llu\n",
- sk_wmem_alloc_get(ax25->sk),
- sk_rmem_alloc_get(ax25->sk),
- sock_i_ino(ax25->sk));
- } else {
- seq_puts(seq, " * * *\n");
- }
- return 0;
-}
-
-static const struct seq_operations ax25_info_seqops = {
- .start = ax25_info_start,
- .next = ax25_info_next,
- .stop = ax25_info_stop,
- .show = ax25_info_show,
-};
-#endif
-
-static const struct net_proto_family ax25_family_ops = {
- .family = PF_AX25,
- .create = ax25_create,
- .owner = THIS_MODULE,
-};
-
-static const struct proto_ops ax25_proto_ops = {
- .family = PF_AX25,
- .owner = THIS_MODULE,
- .release = ax25_release,
- .bind = ax25_bind,
- .connect = ax25_connect,
- .socketpair = sock_no_socketpair,
- .accept = ax25_accept,
- .getname = ax25_getname,
- .poll = datagram_poll,
- .ioctl = ax25_ioctl,
- .gettstamp = sock_gettstamp,
- .listen = ax25_listen,
- .shutdown = ax25_shutdown,
- .setsockopt = ax25_setsockopt,
- .getsockopt = ax25_getsockopt,
- .sendmsg = ax25_sendmsg,
- .recvmsg = ax25_recvmsg,
- .mmap = sock_no_mmap,
-};
-
-/*
- * Called by socket.c on kernel start up
- */
-static struct packet_type ax25_packet_type __read_mostly = {
- .type = cpu_to_be16(ETH_P_AX25),
- .func = ax25_kiss_rcv,
-};
-
-static struct notifier_block ax25_dev_notifier = {
- .notifier_call = ax25_device_event,
-};
-
-static int __init ax25_init(void)
-{
- int rc = proto_register(&ax25_proto, 0);
-
- if (rc != 0)
- goto out;
-
- sock_register(&ax25_family_ops);
- dev_add_pack(&ax25_packet_type);
- register_netdevice_notifier(&ax25_dev_notifier);
-
- proc_create_seq("ax25_route", 0444, init_net.proc_net, &ax25_rt_seqops);
- proc_create_seq("ax25", 0444, init_net.proc_net, &ax25_info_seqops);
- proc_create_seq("ax25_calls", 0444, init_net.proc_net,
- &ax25_uid_seqops);
-out:
- return rc;
-}
-module_init(ax25_init);
-
-
-MODULE_AUTHOR("Jonathan Naylor G4KLX <g4klx@g4klx.demon.co.uk>");
-MODULE_DESCRIPTION("The amateur radio AX.25 link layer protocol");
-MODULE_LICENSE("GPL");
-MODULE_ALIAS_NETPROTO(PF_AX25);
-
-static void __exit ax25_exit(void)
-{
- remove_proc_entry("ax25_route", init_net.proc_net);
- remove_proc_entry("ax25", init_net.proc_net);
- remove_proc_entry("ax25_calls", init_net.proc_net);
-
- unregister_netdevice_notifier(&ax25_dev_notifier);
-
- dev_remove_pack(&ax25_packet_type);
-
- sock_unregister(PF_AX25);
- proto_unregister(&ax25_proto);
-
- ax25_rt_free();
- ax25_uid_free();
- ax25_dev_free();
-}
-module_exit(ax25_exit);
+++ /dev/null
-// SPDX-License-Identifier: GPL-2.0-or-later
-/*
- *
- * Copyright (C) Jonathan Naylor G4KLX (g4klx@g4klx.demon.co.uk)
- */
-#include <linux/errno.h>
-#include <linux/types.h>
-#include <linux/socket.h>
-#include <linux/in.h>
-#include <linux/kernel.h>
-#include <linux/module.h>
-#include <linux/timer.h>
-#include <linux/string.h>
-#include <linux/sockios.h>
-#include <linux/net.h>
-#include <net/ax25.h>
-#include <linux/inet.h>
-#include <linux/netdevice.h>
-#include <linux/skbuff.h>
-#include <net/sock.h>
-#include <linux/uaccess.h>
-#include <linux/fcntl.h>
-#include <linux/mm.h>
-#include <linux/interrupt.h>
-
-/*
- * The default broadcast address of an interface is QST-0; the default address
- * is LINUX-1. The null address is defined as a callsign of all spaces with
- * an SSID of zero.
- */
-
-const ax25_address ax25_bcast =
- {{'Q' << 1, 'S' << 1, 'T' << 1, ' ' << 1, ' ' << 1, ' ' << 1, 0 << 1}};
-const ax25_address ax25_defaddr =
- {{'L' << 1, 'I' << 1, 'N' << 1, 'U' << 1, 'X' << 1, ' ' << 1, 1 << 1}};
-const ax25_address null_ax25_address =
- {{' ' << 1, ' ' << 1, ' ' << 1, ' ' << 1, ' ' << 1, ' ' << 1, 0 << 1}};
-
-EXPORT_SYMBOL_GPL(ax25_bcast);
-EXPORT_SYMBOL_GPL(ax25_defaddr);
-EXPORT_SYMBOL(null_ax25_address);
-
-/*
- * ax25 -> ascii conversion
- */
-char *ax2asc(char *buf, const ax25_address *a)
-{
- char c, *s;
- int n;
-
- for (n = 0, s = buf; n < 6; n++) {
- c = (a->ax25_call[n] >> 1) & 0x7F;
-
- if (c != ' ') *s++ = c;
- }
-
- *s++ = '-';
-
- if ((n = ((a->ax25_call[6] >> 1) & 0x0F)) > 9) {
- *s++ = '1';
- n -= 10;
- }
-
- *s++ = n + '0';
- *s++ = '\0';
-
- if (*buf == '\0' || *buf == '-')
- return "*";
-
- return buf;
-
-}
-
-EXPORT_SYMBOL(ax2asc);
-
-/*
- * ascii -> ax25 conversion
- */
-void asc2ax(ax25_address *addr, const char *callsign)
-{
- const char *s;
- int n;
-
- for (s = callsign, n = 0; n < 6; n++) {
- if (*s != '\0' && *s != '-')
- addr->ax25_call[n] = *s++;
- else
- addr->ax25_call[n] = ' ';
- addr->ax25_call[n] <<= 1;
- addr->ax25_call[n] &= 0xFE;
- }
-
- if (*s++ == '\0') {
- addr->ax25_call[6] = 0x00;
- return;
- }
-
- addr->ax25_call[6] = *s++ - '0';
-
- if (*s != '\0') {
- addr->ax25_call[6] *= 10;
- addr->ax25_call[6] += *s++ - '0';
- }
-
- addr->ax25_call[6] <<= 1;
- addr->ax25_call[6] &= 0x1E;
-}
-
-EXPORT_SYMBOL(asc2ax);
-
-/*
- * Compare two ax.25 addresses
- */
-int ax25cmp(const ax25_address *a, const ax25_address *b)
-{
- int ct = 0;
-
- while (ct < 6) {
- if ((a->ax25_call[ct] & 0xFE) != (b->ax25_call[ct] & 0xFE)) /* Clean off repeater bits */
- return 1;
- ct++;
- }
-
- if ((a->ax25_call[ct] & 0x1E) == (b->ax25_call[ct] & 0x1E)) /* SSID without control bit */
- return 0;
-
- return 2; /* Partial match */
-}
-
-EXPORT_SYMBOL(ax25cmp);
-
-/*
- * Compare two AX.25 digipeater paths.
- */
-int ax25digicmp(const ax25_digi *digi1, const ax25_digi *digi2)
-{
- int i;
-
- if (digi1->ndigi != digi2->ndigi)
- return 1;
-
- if (digi1->lastrepeat != digi2->lastrepeat)
- return 1;
-
- for (i = 0; i < digi1->ndigi; i++)
- if (ax25cmp(&digi1->calls[i], &digi2->calls[i]) != 0)
- return 1;
-
- return 0;
-}
-
-/*
- * Given an AX.25 address pull of to, from, digi list, command/response and the start of data
- *
- */
-const unsigned char *ax25_addr_parse(const unsigned char *buf, int len,
- ax25_address *src, ax25_address *dest, ax25_digi *digi, int *flags,
- int *dama)
-{
- int d = 0;
-
- if (len < 14) return NULL;
-
- if (flags != NULL) {
- *flags = 0;
-
- if (buf[6] & AX25_CBIT)
- *flags = AX25_COMMAND;
- if (buf[13] & AX25_CBIT)
- *flags = AX25_RESPONSE;
- }
-
- if (dama != NULL)
- *dama = ~buf[13] & AX25_DAMA_FLAG;
-
- /* Copy to, from */
- if (dest != NULL)
- memcpy(dest, buf + 0, AX25_ADDR_LEN);
- if (src != NULL)
- memcpy(src, buf + 7, AX25_ADDR_LEN);
-
- buf += 2 * AX25_ADDR_LEN;
- len -= 2 * AX25_ADDR_LEN;
-
- digi->lastrepeat = -1;
- digi->ndigi = 0;
-
- while (!(buf[-1] & AX25_EBIT)) {
- if (d >= AX25_MAX_DIGIS)
- return NULL;
- if (len < AX25_ADDR_LEN)
- return NULL;
-
- memcpy(&digi->calls[d], buf, AX25_ADDR_LEN);
- digi->ndigi = d + 1;
-
- if (buf[6] & AX25_HBIT) {
- digi->repeated[d] = 1;
- digi->lastrepeat = d;
- } else {
- digi->repeated[d] = 0;
- }
-
- buf += AX25_ADDR_LEN;
- len -= AX25_ADDR_LEN;
- d++;
- }
-
- return buf;
-}
-
-/*
- * Assemble an AX.25 header from the bits
- */
-int ax25_addr_build(unsigned char *buf, const ax25_address *src,
- const ax25_address *dest, const ax25_digi *d, int flag, int modulus)
-{
- int len = 0;
- int ct = 0;
-
- memcpy(buf, dest, AX25_ADDR_LEN);
- buf[6] &= ~(AX25_EBIT | AX25_CBIT);
- buf[6] |= AX25_SSSID_SPARE;
-
- if (flag == AX25_COMMAND) buf[6] |= AX25_CBIT;
-
- buf += AX25_ADDR_LEN;
- len += AX25_ADDR_LEN;
-
- memcpy(buf, src, AX25_ADDR_LEN);
- buf[6] &= ~(AX25_EBIT | AX25_CBIT);
- buf[6] &= ~AX25_SSSID_SPARE;
-
- if (modulus == AX25_MODULUS)
- buf[6] |= AX25_SSSID_SPARE;
- else
- buf[6] |= AX25_ESSID_SPARE;
-
- if (flag == AX25_RESPONSE) buf[6] |= AX25_CBIT;
-
- /*
- * Fast path the normal digiless path
- */
- if (d == NULL || d->ndigi == 0) {
- buf[6] |= AX25_EBIT;
- return 2 * AX25_ADDR_LEN;
- }
-
- buf += AX25_ADDR_LEN;
- len += AX25_ADDR_LEN;
-
- while (ct < d->ndigi) {
- memcpy(buf, &d->calls[ct], AX25_ADDR_LEN);
-
- if (d->repeated[ct])
- buf[6] |= AX25_HBIT;
- else
- buf[6] &= ~AX25_HBIT;
-
- buf[6] &= ~AX25_EBIT;
- buf[6] |= AX25_SSSID_SPARE;
-
- buf += AX25_ADDR_LEN;
- len += AX25_ADDR_LEN;
- ct++;
- }
-
- buf[-1] |= AX25_EBIT;
-
- return len;
-}
-
-int ax25_addr_size(const ax25_digi *dp)
-{
- if (dp == NULL)
- return 2 * AX25_ADDR_LEN;
-
- return AX25_ADDR_LEN * (2 + dp->ndigi);
-}
-
-/*
- * Reverse Digipeat List. May not pass both parameters as same struct
- */
-void ax25_digi_invert(const ax25_digi *in, ax25_digi *out)
-{
- int ct;
-
- out->ndigi = in->ndigi;
- out->lastrepeat = in->ndigi - in->lastrepeat - 2;
-
- /* Invert the digipeaters */
- for (ct = 0; ct < in->ndigi; ct++) {
- out->calls[ct] = in->calls[in->ndigi - ct - 1];
-
- if (ct <= out->lastrepeat) {
- out->calls[ct].ax25_call[6] |= AX25_HBIT;
- out->repeated[ct] = 1;
- } else {
- out->calls[ct].ax25_call[6] &= ~AX25_HBIT;
- out->repeated[ct] = 0;
- }
- }
-}
+++ /dev/null
-// SPDX-License-Identifier: GPL-2.0-or-later
-/*
- *
- * Copyright (C) Jonathan Naylor G4KLX (g4klx@g4klx.demon.co.uk)
- */
-#include <linux/errno.h>
-#include <linux/types.h>
-#include <linux/socket.h>
-#include <linux/slab.h>
-#include <linux/in.h>
-#include <linux/kernel.h>
-#include <linux/timer.h>
-#include <linux/string.h>
-#include <linux/sockios.h>
-#include <linux/net.h>
-#include <linux/spinlock.h>
-#include <net/ax25.h>
-#include <linux/inet.h>
-#include <linux/netdevice.h>
-#include <linux/if_arp.h>
-#include <linux/skbuff.h>
-#include <net/sock.h>
-#include <linux/uaccess.h>
-#include <linux/fcntl.h>
-#include <linux/list.h>
-#include <linux/mm.h>
-#include <linux/interrupt.h>
-#include <linux/init.h>
-
-static LIST_HEAD(ax25_dev_list);
-DEFINE_SPINLOCK(ax25_dev_lock);
-
-ax25_dev *ax25_addr_ax25dev(ax25_address *addr)
-{
- ax25_dev *ax25_dev, *res = NULL;
-
- spin_lock_bh(&ax25_dev_lock);
- list_for_each_entry(ax25_dev, &ax25_dev_list, list)
- if (ax25cmp(addr, (const ax25_address *)ax25_dev->dev->dev_addr) == 0) {
- res = ax25_dev;
- ax25_dev_hold(ax25_dev);
- break;
- }
- spin_unlock_bh(&ax25_dev_lock);
-
- return res;
-}
-
-/*
- * This is called when an interface is brought up. These are
- * reasonable defaults.
- */
-void ax25_dev_device_up(struct net_device *dev)
-{
- ax25_dev *ax25_dev;
-
- ax25_dev = kzalloc_obj(*ax25_dev);
- if (!ax25_dev) {
- printk(KERN_ERR "AX.25: ax25_dev_device_up - out of memory\n");
- return;
- }
-
- refcount_set(&ax25_dev->refcount, 1);
- ax25_dev->dev = dev;
- netdev_hold(dev, &ax25_dev->dev_tracker, GFP_KERNEL);
- ax25_dev->forward = NULL;
- ax25_dev->device_up = true;
-
- ax25_dev->values[AX25_VALUES_IPDEFMODE] = AX25_DEF_IPDEFMODE;
- ax25_dev->values[AX25_VALUES_AXDEFMODE] = AX25_DEF_AXDEFMODE;
- ax25_dev->values[AX25_VALUES_BACKOFF] = AX25_DEF_BACKOFF;
- ax25_dev->values[AX25_VALUES_CONMODE] = AX25_DEF_CONMODE;
- ax25_dev->values[AX25_VALUES_WINDOW] = AX25_DEF_WINDOW;
- ax25_dev->values[AX25_VALUES_EWINDOW] = AX25_DEF_EWINDOW;
- ax25_dev->values[AX25_VALUES_T1] = AX25_DEF_T1;
- ax25_dev->values[AX25_VALUES_T2] = AX25_DEF_T2;
- ax25_dev->values[AX25_VALUES_T3] = AX25_DEF_T3;
- ax25_dev->values[AX25_VALUES_IDLE] = AX25_DEF_IDLE;
- ax25_dev->values[AX25_VALUES_N2] = AX25_DEF_N2;
- ax25_dev->values[AX25_VALUES_PACLEN] = AX25_DEF_PACLEN;
- ax25_dev->values[AX25_VALUES_PROTOCOL] = AX25_DEF_PROTOCOL;
-
-#ifdef CONFIG_AX25_DAMA_SLAVE
- ax25_dev->values[AX25_VALUES_DS_TIMEOUT]= AX25_DEF_DS_TIMEOUT;
-
- ax25_ds_setup_timer(ax25_dev);
-#endif
-
- spin_lock_bh(&ax25_dev_lock);
- list_add(&ax25_dev->list, &ax25_dev_list);
- rcu_assign_pointer(dev->ax25_ptr, ax25_dev);
- spin_unlock_bh(&ax25_dev_lock);
-
- ax25_register_dev_sysctl(ax25_dev);
-}
-
-void ax25_dev_device_down(struct net_device *dev)
-{
- ax25_dev *s, *ax25_dev;
-
- if ((ax25_dev = ax25_dev_ax25dev(dev)) == NULL)
- return;
-
- ax25_unregister_dev_sysctl(ax25_dev);
-
- spin_lock_bh(&ax25_dev_lock);
-
-#ifdef CONFIG_AX25_DAMA_SLAVE
- timer_shutdown_sync(&ax25_dev->dama.slave_timer);
-#endif
-
- /*
- * Remove any packet forwarding that points to this device.
- */
- list_for_each_entry(s, &ax25_dev_list, list)
- if (s->forward == dev)
- s->forward = NULL;
-
- list_for_each_entry(s, &ax25_dev_list, list) {
- if (s == ax25_dev) {
- list_del(&s->list);
- break;
- }
- }
-
- RCU_INIT_POINTER(dev->ax25_ptr, NULL);
- spin_unlock_bh(&ax25_dev_lock);
- netdev_put(dev, &ax25_dev->dev_tracker);
- ax25_dev_put(ax25_dev);
-}
-
-int ax25_fwd_ioctl(unsigned int cmd, struct ax25_fwd_struct *fwd)
-{
- ax25_dev *ax25_dev, *fwd_dev;
-
- if ((ax25_dev = ax25_addr_ax25dev(&fwd->port_from)) == NULL)
- return -EINVAL;
-
- switch (cmd) {
- case SIOCAX25ADDFWD:
- fwd_dev = ax25_addr_ax25dev(&fwd->port_to);
- if (!fwd_dev) {
- ax25_dev_put(ax25_dev);
- return -EINVAL;
- }
- if (ax25_dev->forward) {
- ax25_dev_put(fwd_dev);
- ax25_dev_put(ax25_dev);
- return -EINVAL;
- }
- ax25_dev->forward = fwd_dev->dev;
- ax25_dev_put(fwd_dev);
- ax25_dev_put(ax25_dev);
- break;
-
- case SIOCAX25DELFWD:
- if (!ax25_dev->forward) {
- ax25_dev_put(ax25_dev);
- return -EINVAL;
- }
- ax25_dev->forward = NULL;
- ax25_dev_put(ax25_dev);
- break;
-
- default:
- ax25_dev_put(ax25_dev);
- return -EINVAL;
- }
-
- return 0;
-}
-
-struct net_device *ax25_fwd_dev(struct net_device *dev)
-{
- ax25_dev *ax25_dev;
-
- if ((ax25_dev = ax25_dev_ax25dev(dev)) == NULL)
- return dev;
-
- if (ax25_dev->forward == NULL)
- return dev;
-
- return ax25_dev->forward;
-}
-
-/*
- * Free all memory associated with device structures.
- */
-void __exit ax25_dev_free(void)
-{
- ax25_dev *s, *n;
-
- spin_lock_bh(&ax25_dev_lock);
- list_for_each_entry_safe(s, n, &ax25_dev_list, list) {
- netdev_put(s->dev, &s->dev_tracker);
- list_del(&s->list);
- ax25_dev_put(s);
- }
- spin_unlock_bh(&ax25_dev_lock);
-}
+++ /dev/null
-// SPDX-License-Identifier: GPL-2.0-or-later
-/*
- *
- * Copyright (C) Jonathan Naylor G4KLX (g4klx@g4klx.demon.co.uk)
- * Copyright (C) Joerg Reuter DL1BKE (jreuter@yaina.de)
- */
-#include <linux/errno.h>
-#include <linux/types.h>
-#include <linux/socket.h>
-#include <linux/in.h>
-#include <linux/kernel.h>
-#include <linux/timer.h>
-#include <linux/string.h>
-#include <linux/sockios.h>
-#include <linux/net.h>
-#include <net/ax25.h>
-#include <linux/inet.h>
-#include <linux/netdevice.h>
-#include <linux/skbuff.h>
-#include <net/sock.h>
-#include <net/tcp_states.h>
-#include <linux/uaccess.h>
-#include <linux/fcntl.h>
-#include <linux/mm.h>
-#include <linux/interrupt.h>
-
-/*
- * State machine for state 1, Awaiting Connection State.
- * The handling of the timer(s) is in file ax25_ds_timer.c.
- * Handling of state 0 and connection release is in ax25.c.
- */
-static int ax25_ds_state1_machine(ax25_cb *ax25, struct sk_buff *skb, int frametype, int pf, int type)
-{
- switch (frametype) {
- case AX25_SABM:
- ax25->modulus = AX25_MODULUS;
- ax25->window = ax25->ax25_dev->values[AX25_VALUES_WINDOW];
- ax25_send_control(ax25, AX25_UA, pf, AX25_RESPONSE);
- break;
-
- case AX25_SABME:
- ax25->modulus = AX25_EMODULUS;
- ax25->window = ax25->ax25_dev->values[AX25_VALUES_EWINDOW];
- ax25_send_control(ax25, AX25_UA, pf, AX25_RESPONSE);
- break;
-
- case AX25_DISC:
- ax25_send_control(ax25, AX25_DM, pf, AX25_RESPONSE);
- break;
-
- case AX25_UA:
- ax25_calculate_rtt(ax25);
- ax25_stop_t1timer(ax25);
- ax25_start_t3timer(ax25);
- ax25_start_idletimer(ax25);
- ax25->vs = 0;
- ax25->va = 0;
- ax25->vr = 0;
- ax25->state = AX25_STATE_3;
- ax25->n2count = 0;
- if (ax25->sk != NULL) {
- bh_lock_sock(ax25->sk);
- ax25->sk->sk_state = TCP_ESTABLISHED;
- /*
- * For WAIT_SABM connections we will produce an accept
- * ready socket here
- */
- if (!sock_flag(ax25->sk, SOCK_DEAD))
- ax25->sk->sk_state_change(ax25->sk);
- bh_unlock_sock(ax25->sk);
- }
- ax25_dama_on(ax25);
-
- /* according to DK4EG's spec we are required to
- * send a RR RESPONSE FINAL NR=0.
- */
-
- ax25_std_enquiry_response(ax25);
- break;
-
- case AX25_DM:
- if (pf)
- ax25_disconnect(ax25, ECONNREFUSED);
- break;
-
- default:
- if (pf)
- ax25_send_control(ax25, AX25_SABM, AX25_POLLON, AX25_COMMAND);
- break;
- }
-
- return 0;
-}
-
-/*
- * State machine for state 2, Awaiting Release State.
- * The handling of the timer(s) is in file ax25_ds_timer.c
- * Handling of state 0 and connection release is in ax25.c.
- */
-static int ax25_ds_state2_machine(ax25_cb *ax25, struct sk_buff *skb, int frametype, int pf, int type)
-{
- switch (frametype) {
- case AX25_SABM:
- case AX25_SABME:
- ax25_send_control(ax25, AX25_DISC, AX25_POLLON, AX25_COMMAND);
- ax25_dama_off(ax25);
- break;
-
- case AX25_DISC:
- ax25_send_control(ax25, AX25_UA, pf, AX25_RESPONSE);
- ax25_dama_off(ax25);
- ax25_disconnect(ax25, 0);
- break;
-
- case AX25_DM:
- case AX25_UA:
- if (pf) {
- ax25_dama_off(ax25);
- ax25_disconnect(ax25, 0);
- }
- break;
-
- case AX25_I:
- case AX25_REJ:
- case AX25_RNR:
- case AX25_RR:
- if (pf) {
- ax25_send_control(ax25, AX25_DISC, AX25_POLLON, AX25_COMMAND);
- ax25_dama_off(ax25);
- }
- break;
-
- default:
- break;
- }
-
- return 0;
-}
-
-/*
- * State machine for state 3, Connected State.
- * The handling of the timer(s) is in file ax25_timer.c
- * Handling of state 0 and connection release is in ax25.c.
- */
-static int ax25_ds_state3_machine(ax25_cb *ax25, struct sk_buff *skb, int frametype, int ns, int nr, int pf, int type)
-{
- int queued = 0;
-
- switch (frametype) {
- case AX25_SABM:
- case AX25_SABME:
- if (frametype == AX25_SABM) {
- ax25->modulus = AX25_MODULUS;
- ax25->window = ax25->ax25_dev->values[AX25_VALUES_WINDOW];
- } else {
- ax25->modulus = AX25_EMODULUS;
- ax25->window = ax25->ax25_dev->values[AX25_VALUES_EWINDOW];
- }
- ax25_send_control(ax25, AX25_UA, pf, AX25_RESPONSE);
- ax25_stop_t1timer(ax25);
- ax25_start_t3timer(ax25);
- ax25_start_idletimer(ax25);
- ax25->condition = 0x00;
- ax25->vs = 0;
- ax25->va = 0;
- ax25->vr = 0;
- ax25_requeue_frames(ax25);
- ax25_dama_on(ax25);
- break;
-
- case AX25_DISC:
- ax25_send_control(ax25, AX25_UA, pf, AX25_RESPONSE);
- ax25_dama_off(ax25);
- ax25_disconnect(ax25, 0);
- break;
-
- case AX25_DM:
- ax25_dama_off(ax25);
- ax25_disconnect(ax25, ECONNRESET);
- break;
-
- case AX25_RR:
- case AX25_RNR:
- if (frametype == AX25_RR)
- ax25->condition &= ~AX25_COND_PEER_RX_BUSY;
- else
- ax25->condition |= AX25_COND_PEER_RX_BUSY;
-
- if (ax25_validate_nr(ax25, nr)) {
- if (ax25_check_iframes_acked(ax25, nr))
- ax25->n2count=0;
- if (type == AX25_COMMAND && pf)
- ax25_ds_enquiry_response(ax25);
- } else {
- ax25_ds_nr_error_recovery(ax25);
- ax25->state = AX25_STATE_1;
- }
- break;
-
- case AX25_REJ:
- ax25->condition &= ~AX25_COND_PEER_RX_BUSY;
-
- if (ax25_validate_nr(ax25, nr)) {
- if (ax25->va != nr)
- ax25->n2count=0;
-
- ax25_frames_acked(ax25, nr);
- ax25_calculate_rtt(ax25);
- ax25_stop_t1timer(ax25);
- ax25_start_t3timer(ax25);
- ax25_requeue_frames(ax25);
-
- if (type == AX25_COMMAND && pf)
- ax25_ds_enquiry_response(ax25);
- } else {
- ax25_ds_nr_error_recovery(ax25);
- ax25->state = AX25_STATE_1;
- }
- break;
-
- case AX25_I:
- if (!ax25_validate_nr(ax25, nr)) {
- ax25_ds_nr_error_recovery(ax25);
- ax25->state = AX25_STATE_1;
- break;
- }
- if (ax25->condition & AX25_COND_PEER_RX_BUSY) {
- ax25_frames_acked(ax25, nr);
- ax25->n2count = 0;
- } else {
- if (ax25_check_iframes_acked(ax25, nr))
- ax25->n2count = 0;
- }
- if (ax25->condition & AX25_COND_OWN_RX_BUSY) {
- if (pf) ax25_ds_enquiry_response(ax25);
- break;
- }
- if (ns == ax25->vr) {
- ax25->vr = (ax25->vr + 1) % ax25->modulus;
- queued = ax25_rx_iframe(ax25, skb);
- if (ax25->condition & AX25_COND_OWN_RX_BUSY)
- ax25->vr = ns; /* ax25->vr - 1 */
- ax25->condition &= ~AX25_COND_REJECT;
- if (pf) {
- ax25_ds_enquiry_response(ax25);
- } else {
- if (!(ax25->condition & AX25_COND_ACK_PENDING)) {
- ax25->condition |= AX25_COND_ACK_PENDING;
- ax25_start_t2timer(ax25);
- }
- }
- } else {
- if (ax25->condition & AX25_COND_REJECT) {
- if (pf) ax25_ds_enquiry_response(ax25);
- } else {
- ax25->condition |= AX25_COND_REJECT;
- ax25_ds_enquiry_response(ax25);
- ax25->condition &= ~AX25_COND_ACK_PENDING;
- }
- }
- break;
-
- case AX25_FRMR:
- case AX25_ILLEGAL:
- ax25_ds_establish_data_link(ax25);
- ax25->state = AX25_STATE_1;
- break;
-
- default:
- break;
- }
-
- return queued;
-}
-
-/*
- * Higher level upcall for a LAPB frame
- */
-int ax25_ds_frame_in(ax25_cb *ax25, struct sk_buff *skb, int type)
-{
- int queued = 0, frametype, ns, nr, pf;
-
- frametype = ax25_decode(ax25, skb, &ns, &nr, &pf);
-
- switch (ax25->state) {
- case AX25_STATE_1:
- queued = ax25_ds_state1_machine(ax25, skb, frametype, pf, type);
- break;
- case AX25_STATE_2:
- queued = ax25_ds_state2_machine(ax25, skb, frametype, pf, type);
- break;
- case AX25_STATE_3:
- queued = ax25_ds_state3_machine(ax25, skb, frametype, ns, nr, pf, type);
- break;
- }
-
- return queued;
-}
+++ /dev/null
-// SPDX-License-Identifier: GPL-2.0-or-later
-/*
- *
- * Copyright (C) Jonathan Naylor G4KLX (g4klx@g4klx.demon.co.uk)
- * Copyright (C) Joerg Reuter DL1BKE (jreuter@yaina.de)
- */
-#include <linux/errno.h>
-#include <linux/types.h>
-#include <linux/socket.h>
-#include <linux/in.h>
-#include <linux/kernel.h>
-#include <linux/timer.h>
-#include <linux/string.h>
-#include <linux/sockios.h>
-#include <linux/spinlock.h>
-#include <linux/net.h>
-#include <linux/gfp.h>
-#include <net/ax25.h>
-#include <linux/inet.h>
-#include <linux/netdevice.h>
-#include <linux/skbuff.h>
-#include <net/sock.h>
-#include <linux/uaccess.h>
-#include <linux/fcntl.h>
-#include <linux/mm.h>
-#include <linux/interrupt.h>
-
-void ax25_ds_nr_error_recovery(ax25_cb *ax25)
-{
- ax25_ds_establish_data_link(ax25);
-}
-
-/*
- * dl1bke 960114: transmit I frames on DAMA poll
- */
-void ax25_ds_enquiry_response(ax25_cb *ax25)
-{
- ax25_cb *ax25o;
-
- /* Please note that neither DK4EG's nor DG2FEF's
- * DAMA spec mention the following behaviour as seen
- * with TheFirmware:
- *
- * DB0ACH->DL1BKE <RR C P R0> [DAMA]
- * DL1BKE->DB0ACH <I NR=0 NS=0>
- * DL1BKE-7->DB0PRA-6 DB0ACH <I C S3 R5>
- * DL1BKE->DB0ACH <RR R F R0>
- *
- * The Flexnet DAMA Master implementation apparently
- * insists on the "proper" AX.25 behaviour:
- *
- * DB0ACH->DL1BKE <RR C P R0> [DAMA]
- * DL1BKE->DB0ACH <RR R F R0>
- * DL1BKE->DB0ACH <I NR=0 NS=0>
- * DL1BKE-7->DB0PRA-6 DB0ACH <I C S3 R5>
- *
- * Flexnet refuses to send us *any* I frame if we send
- * a REJ in case AX25_COND_REJECT is set. It is superfluous in
- * this mode anyway (a RR or RNR invokes the retransmission).
- * Is this a Flexnet bug?
- */
-
- ax25_std_enquiry_response(ax25);
-
- if (!(ax25->condition & AX25_COND_PEER_RX_BUSY)) {
- ax25_requeue_frames(ax25);
- ax25_kick(ax25);
- }
-
- if (ax25->state == AX25_STATE_1 || ax25->state == AX25_STATE_2 || skb_peek(&ax25->ack_queue) != NULL)
- ax25_ds_t1_timeout(ax25);
- else
- ax25->n2count = 0;
-
- ax25_start_t3timer(ax25);
- ax25_ds_set_timer(ax25->ax25_dev);
-
- spin_lock(&ax25_list_lock);
- ax25_for_each(ax25o, &ax25_list) {
- if (ax25o == ax25)
- continue;
-
- if (ax25o->ax25_dev != ax25->ax25_dev)
- continue;
-
- if (ax25o->state == AX25_STATE_1 || ax25o->state == AX25_STATE_2) {
- ax25_ds_t1_timeout(ax25o);
- continue;
- }
-
- if (!(ax25o->condition & AX25_COND_PEER_RX_BUSY) && ax25o->state == AX25_STATE_3) {
- ax25_requeue_frames(ax25o);
- ax25_kick(ax25o);
- }
-
- if (ax25o->state == AX25_STATE_1 || ax25o->state == AX25_STATE_2 || skb_peek(&ax25o->ack_queue) != NULL)
- ax25_ds_t1_timeout(ax25o);
-
- /* do not start T3 for listening sockets (tnx DD8NE) */
-
- if (ax25o->state != AX25_STATE_0)
- ax25_start_t3timer(ax25o);
- }
- spin_unlock(&ax25_list_lock);
-}
-
-void ax25_ds_establish_data_link(ax25_cb *ax25)
-{
- ax25->condition &= AX25_COND_DAMA_MODE;
- ax25->n2count = 0;
- ax25_calculate_t1(ax25);
- ax25_start_t1timer(ax25);
- ax25_stop_t2timer(ax25);
- ax25_start_t3timer(ax25);
-}
-
-/*
- * :::FIXME:::
- * This is a kludge. Not all drivers recognize kiss commands.
- * We need a driver level request to switch duplex mode, that does
- * either SCC changing, PI config or KISS as required. Currently
- * this request isn't reliable.
- */
-static void ax25_kiss_cmd(ax25_dev *ax25_dev, unsigned char cmd, unsigned char param)
-{
- struct sk_buff *skb;
- unsigned char *p;
-
- if (ax25_dev->dev == NULL)
- return;
-
- if ((skb = alloc_skb(2, GFP_ATOMIC)) == NULL)
- return;
-
- skb_reset_network_header(skb);
- p = skb_put(skb, 2);
-
- *p++ = cmd;
- *p++ = param;
-
- skb->protocol = ax25_type_trans(skb, ax25_dev->dev);
-
- dev_queue_xmit(skb);
-}
-
-/*
- * A nasty problem arises if we count the number of DAMA connections
- * wrong, especially when connections on the device already existed
- * and our network node (or the sysop) decides to turn on DAMA Master
- * mode. We thus flag the 'real' slave connections with
- * ax25->dama_slave=1 and look on every disconnect if still slave
- * connections exist.
- */
-static int ax25_check_dama_slave(ax25_dev *ax25_dev)
-{
- ax25_cb *ax25;
- int res = 0;
-
- spin_lock(&ax25_list_lock);
- ax25_for_each(ax25, &ax25_list)
- if (ax25->ax25_dev == ax25_dev && (ax25->condition & AX25_COND_DAMA_MODE) && ax25->state > AX25_STATE_1) {
- res = 1;
- break;
- }
- spin_unlock(&ax25_list_lock);
-
- return res;
-}
-
-static void ax25_dev_dama_on(ax25_dev *ax25_dev)
-{
- if (ax25_dev == NULL)
- return;
-
- if (ax25_dev->dama.slave == 0)
- ax25_kiss_cmd(ax25_dev, 5, 1);
-
- ax25_dev->dama.slave = 1;
- ax25_ds_set_timer(ax25_dev);
-}
-
-void ax25_dev_dama_off(ax25_dev *ax25_dev)
-{
- if (ax25_dev == NULL)
- return;
-
- if (ax25_dev->dama.slave && !ax25_check_dama_slave(ax25_dev)) {
- ax25_kiss_cmd(ax25_dev, 5, 0);
- ax25_dev->dama.slave = 0;
- ax25_ds_del_timer(ax25_dev);
- }
-}
-
-void ax25_dama_on(ax25_cb *ax25)
-{
- ax25_dev_dama_on(ax25->ax25_dev);
- ax25->condition |= AX25_COND_DAMA_MODE;
-}
-
-void ax25_dama_off(ax25_cb *ax25)
-{
- ax25->condition &= ~AX25_COND_DAMA_MODE;
- ax25_dev_dama_off(ax25->ax25_dev);
-}
+++ /dev/null
-// SPDX-License-Identifier: GPL-2.0-or-later
-/*
- *
- * Copyright (C) Jonathan Naylor G4KLX (g4klx@g4klx.demon.co.uk)
- * Copyright (C) Joerg Reuter DL1BKE (jreuter@yaina.de)
- */
-#include <linux/errno.h>
-#include <linux/types.h>
-#include <linux/socket.h>
-#include <linux/spinlock.h>
-#include <linux/in.h>
-#include <linux/kernel.h>
-#include <linux/jiffies.h>
-#include <linux/timer.h>
-#include <linux/string.h>
-#include <linux/sockios.h>
-#include <linux/net.h>
-#include <net/tcp_states.h>
-#include <net/ax25.h>
-#include <linux/inet.h>
-#include <linux/netdevice.h>
-#include <linux/skbuff.h>
-#include <net/sock.h>
-#include <linux/uaccess.h>
-#include <linux/fcntl.h>
-#include <linux/mm.h>
-#include <linux/interrupt.h>
-
-static void ax25_ds_timeout(struct timer_list *);
-
-/*
- * Add DAMA slave timeout timer to timer list.
- * Unlike the connection based timers the timeout function gets
- * triggered every second. Please note that NET_AX25_DAMA_SLAVE_TIMEOUT
- * (aka /proc/sys/net/ax25/{dev}/dama_slave_timeout) is still in
- * 1/10th of a second.
- */
-
-void ax25_ds_setup_timer(ax25_dev *ax25_dev)
-{
- timer_setup(&ax25_dev->dama.slave_timer, ax25_ds_timeout, 0);
-}
-
-void ax25_ds_del_timer(ax25_dev *ax25_dev)
-{
- if (ax25_dev)
- timer_delete(&ax25_dev->dama.slave_timer);
-}
-
-void ax25_ds_set_timer(ax25_dev *ax25_dev)
-{
- if (ax25_dev == NULL) /* paranoia */
- return;
-
- ax25_dev->dama.slave_timeout =
- msecs_to_jiffies(ax25_dev->values[AX25_VALUES_DS_TIMEOUT]) / 10;
- mod_timer(&ax25_dev->dama.slave_timer, jiffies + HZ);
-}
-
-/*
- * DAMA Slave Timeout
- * Silently discard all (slave) connections in case our master forgot us...
- */
-
-static void ax25_ds_timeout(struct timer_list *t)
-{
- ax25_dev *ax25_dev = timer_container_of(ax25_dev, t, dama.slave_timer);
- ax25_cb *ax25;
-
- if (ax25_dev == NULL || !ax25_dev->dama.slave)
- return; /* Yikes! */
-
- if (!ax25_dev->dama.slave_timeout || --ax25_dev->dama.slave_timeout) {
- ax25_ds_set_timer(ax25_dev);
- return;
- }
-
- spin_lock(&ax25_list_lock);
- ax25_for_each(ax25, &ax25_list) {
- if (ax25->ax25_dev != ax25_dev || !(ax25->condition & AX25_COND_DAMA_MODE))
- continue;
-
- ax25_send_control(ax25, AX25_DISC, AX25_POLLON, AX25_COMMAND);
- ax25_disconnect(ax25, ETIMEDOUT);
- }
- spin_unlock(&ax25_list_lock);
-
- ax25_dev_dama_off(ax25_dev);
-}
-
-void ax25_ds_heartbeat_expiry(ax25_cb *ax25)
-{
- struct sock *sk=ax25->sk;
-
- if (sk)
- bh_lock_sock(sk);
-
- switch (ax25->state) {
-
- case AX25_STATE_0:
- case AX25_STATE_2:
- /* Magic here: If we listen() and a new link dies before it
- is accepted() it isn't 'dead' so doesn't get removed. */
- if (!sk || sock_flag(sk, SOCK_DESTROY) ||
- (sk->sk_state == TCP_LISTEN &&
- sock_flag(sk, SOCK_DEAD))) {
- if (sk) {
- sock_hold(sk);
- ax25_destroy_socket(ax25);
- bh_unlock_sock(sk);
- /* Ungrab socket and destroy it */
- sock_put(sk);
- } else
- ax25_destroy_socket(ax25);
- return;
- }
- break;
-
- case AX25_STATE_3:
- /*
- * Check the state of the receive buffer.
- */
- if (sk != NULL) {
- if (atomic_read(&sk->sk_rmem_alloc) <
- (sk->sk_rcvbuf >> 1) &&
- (ax25->condition & AX25_COND_OWN_RX_BUSY)) {
- ax25->condition &= ~AX25_COND_OWN_RX_BUSY;
- ax25->condition &= ~AX25_COND_ACK_PENDING;
- break;
- }
- }
- break;
- }
-
- if (sk)
- bh_unlock_sock(sk);
-
- ax25_start_heartbeat(ax25);
-}
-
-/* dl1bke 960114: T3 works much like the IDLE timeout, but
- * gets reloaded with every frame for this
- * connection.
- */
-void ax25_ds_t3timer_expiry(ax25_cb *ax25)
-{
- ax25_send_control(ax25, AX25_DISC, AX25_POLLON, AX25_COMMAND);
- ax25_dama_off(ax25);
- ax25_disconnect(ax25, ETIMEDOUT);
-}
-
-/* dl1bke 960228: close the connection when IDLE expires.
- * unlike T3 this timer gets reloaded only on
- * I frames.
- */
-void ax25_ds_idletimer_expiry(ax25_cb *ax25)
-{
- ax25_clear_queues(ax25);
-
- ax25->n2count = 0;
- ax25->state = AX25_STATE_2;
-
- ax25_calculate_t1(ax25);
- ax25_start_t1timer(ax25);
- ax25_stop_t3timer(ax25);
-
- if (ax25->sk != NULL) {
- bh_lock_sock(ax25->sk);
- ax25->sk->sk_state = TCP_CLOSE;
- ax25->sk->sk_err = 0;
- ax25->sk->sk_shutdown |= SEND_SHUTDOWN;
- if (!sock_flag(ax25->sk, SOCK_DEAD)) {
- ax25->sk->sk_state_change(ax25->sk);
- sock_set_flag(ax25->sk, SOCK_DEAD);
- }
- bh_unlock_sock(ax25->sk);
- }
-}
-
-/* dl1bke 960114: The DAMA protocol requires to send data and SABM/DISC
- * within the poll of any connected channel. Remember
- * that we are not allowed to send anything unless we
- * get polled by the Master.
- *
- * Thus we'll have to do parts of our T1 handling in
- * ax25_enquiry_response().
- */
-void ax25_ds_t1_timeout(ax25_cb *ax25)
-{
- switch (ax25->state) {
- case AX25_STATE_1:
- if (ax25->n2count == ax25->n2) {
- if (ax25->modulus == AX25_MODULUS) {
- ax25_disconnect(ax25, ETIMEDOUT);
- return;
- } else {
- ax25->modulus = AX25_MODULUS;
- ax25->window = ax25->ax25_dev->values[AX25_VALUES_WINDOW];
- ax25->n2count = 0;
- ax25_send_control(ax25, AX25_SABM, AX25_POLLOFF, AX25_COMMAND);
- }
- } else {
- ax25->n2count++;
- if (ax25->modulus == AX25_MODULUS)
- ax25_send_control(ax25, AX25_SABM, AX25_POLLOFF, AX25_COMMAND);
- else
- ax25_send_control(ax25, AX25_SABME, AX25_POLLOFF, AX25_COMMAND);
- }
- break;
-
- case AX25_STATE_2:
- if (ax25->n2count == ax25->n2) {
- ax25_send_control(ax25, AX25_DISC, AX25_POLLON, AX25_COMMAND);
- if (!sock_flag(ax25->sk, SOCK_DESTROY))
- ax25_disconnect(ax25, ETIMEDOUT);
- return;
- } else {
- ax25->n2count++;
- }
- break;
-
- case AX25_STATE_3:
- if (ax25->n2count == ax25->n2) {
- ax25_send_control(ax25, AX25_DM, AX25_POLLON, AX25_RESPONSE);
- ax25_disconnect(ax25, ETIMEDOUT);
- return;
- } else {
- ax25->n2count++;
- }
- break;
- }
-
- ax25_calculate_t1(ax25);
- ax25_start_t1timer(ax25);
-}
+++ /dev/null
-// SPDX-License-Identifier: GPL-2.0-or-later
-/*
- *
- * Copyright (C) Jonathan Naylor G4KLX (g4klx@g4klx.demon.co.uk)
- */
-#include <linux/errno.h>
-#include <linux/types.h>
-#include <linux/socket.h>
-#include <linux/in.h>
-#include <linux/kernel.h>
-#include <linux/module.h>
-#include <linux/spinlock.h>
-#include <linux/timer.h>
-#include <linux/string.h>
-#include <linux/sockios.h>
-#include <linux/net.h>
-#include <linux/slab.h>
-#include <net/ax25.h>
-#include <linux/inet.h>
-#include <linux/netdevice.h>
-#include <linux/skbuff.h>
-#include <net/sock.h>
-#include <linux/uaccess.h>
-#include <linux/fcntl.h>
-#include <linux/mm.h>
-#include <linux/interrupt.h>
-
-static struct ax25_protocol *protocol_list;
-static DEFINE_RWLOCK(protocol_list_lock);
-
-static HLIST_HEAD(ax25_linkfail_list);
-static DEFINE_SPINLOCK(linkfail_lock);
-
-static struct listen_struct {
- struct listen_struct *next;
- ax25_address callsign;
- struct net_device *dev;
-} *listen_list = NULL;
-static DEFINE_SPINLOCK(listen_lock);
-
-/*
- * Do not register the internal protocols AX25_P_TEXT, AX25_P_SEGMENT,
- * AX25_P_IP or AX25_P_ARP ...
- */
-void ax25_register_pid(struct ax25_protocol *ap)
-{
- write_lock_bh(&protocol_list_lock);
- ap->next = protocol_list;
- protocol_list = ap;
- write_unlock_bh(&protocol_list_lock);
-}
-
-EXPORT_SYMBOL_GPL(ax25_register_pid);
-
-void ax25_protocol_release(unsigned int pid)
-{
- struct ax25_protocol *protocol;
-
- write_lock_bh(&protocol_list_lock);
- protocol = protocol_list;
- if (protocol == NULL)
- goto out;
-
- if (protocol->pid == pid) {
- protocol_list = protocol->next;
- goto out;
- }
-
- while (protocol != NULL && protocol->next != NULL) {
- if (protocol->next->pid == pid) {
- protocol->next = protocol->next->next;
- goto out;
- }
-
- protocol = protocol->next;
- }
-out:
- write_unlock_bh(&protocol_list_lock);
-}
-
-EXPORT_SYMBOL(ax25_protocol_release);
-
-void ax25_linkfail_register(struct ax25_linkfail *lf)
-{
- spin_lock_bh(&linkfail_lock);
- hlist_add_head(&lf->lf_node, &ax25_linkfail_list);
- spin_unlock_bh(&linkfail_lock);
-}
-
-EXPORT_SYMBOL(ax25_linkfail_register);
-
-void ax25_linkfail_release(struct ax25_linkfail *lf)
-{
- spin_lock_bh(&linkfail_lock);
- hlist_del_init(&lf->lf_node);
- spin_unlock_bh(&linkfail_lock);
-}
-
-EXPORT_SYMBOL(ax25_linkfail_release);
-
-int ax25_listen_register(const ax25_address *callsign, struct net_device *dev)
-{
- struct listen_struct *listen;
-
- if (ax25_listen_mine(callsign, dev))
- return 0;
-
- if ((listen = kmalloc_obj(*listen, GFP_ATOMIC)) == NULL)
- return -ENOMEM;
-
- listen->callsign = *callsign;
- listen->dev = dev;
-
- spin_lock_bh(&listen_lock);
- listen->next = listen_list;
- listen_list = listen;
- spin_unlock_bh(&listen_lock);
-
- return 0;
-}
-
-EXPORT_SYMBOL(ax25_listen_register);
-
-void ax25_listen_release(const ax25_address *callsign, struct net_device *dev)
-{
- struct listen_struct *s, *listen;
-
- spin_lock_bh(&listen_lock);
- listen = listen_list;
- if (listen == NULL) {
- spin_unlock_bh(&listen_lock);
- return;
- }
-
- if (ax25cmp(&listen->callsign, callsign) == 0 && listen->dev == dev) {
- listen_list = listen->next;
- spin_unlock_bh(&listen_lock);
- kfree(listen);
- return;
- }
-
- while (listen != NULL && listen->next != NULL) {
- if (ax25cmp(&listen->next->callsign, callsign) == 0 && listen->next->dev == dev) {
- s = listen->next;
- listen->next = listen->next->next;
- spin_unlock_bh(&listen_lock);
- kfree(s);
- return;
- }
-
- listen = listen->next;
- }
- spin_unlock_bh(&listen_lock);
-}
-
-EXPORT_SYMBOL(ax25_listen_release);
-
-int (*ax25_protocol_function(unsigned int pid))(struct sk_buff *, ax25_cb *)
-{
- int (*res)(struct sk_buff *, ax25_cb *) = NULL;
- struct ax25_protocol *protocol;
-
- read_lock(&protocol_list_lock);
- for (protocol = protocol_list; protocol != NULL; protocol = protocol->next)
- if (protocol->pid == pid) {
- res = protocol->func;
- break;
- }
- read_unlock(&protocol_list_lock);
-
- return res;
-}
-
-int ax25_listen_mine(const ax25_address *callsign, struct net_device *dev)
-{
- struct listen_struct *listen;
-
- spin_lock_bh(&listen_lock);
- for (listen = listen_list; listen != NULL; listen = listen->next)
- if (ax25cmp(&listen->callsign, callsign) == 0 &&
- (listen->dev == dev || listen->dev == NULL)) {
- spin_unlock_bh(&listen_lock);
- return 1;
- }
- spin_unlock_bh(&listen_lock);
-
- return 0;
-}
-
-void ax25_link_failed(ax25_cb *ax25, int reason)
-{
- struct ax25_linkfail *lf;
-
- spin_lock_bh(&linkfail_lock);
- hlist_for_each_entry(lf, &ax25_linkfail_list, lf_node)
- lf->func(ax25, reason);
- spin_unlock_bh(&linkfail_lock);
-}
-
-int ax25_protocol_is_registered(unsigned int pid)
-{
- struct ax25_protocol *protocol;
- int res = 0;
-
- read_lock_bh(&protocol_list_lock);
- for (protocol = protocol_list; protocol != NULL; protocol = protocol->next)
- if (protocol->pid == pid) {
- res = 1;
- break;
- }
- read_unlock_bh(&protocol_list_lock);
-
- return res;
-}
+++ /dev/null
-// SPDX-License-Identifier: GPL-2.0-or-later
-/*
- *
- * Copyright (C) Alan Cox GW4PTS (alan@lxorguk.ukuu.org.uk)
- * Copyright (C) Jonathan Naylor G4KLX (g4klx@g4klx.demon.co.uk)
- * Copyright (C) Joerg Reuter DL1BKE (jreuter@yaina.de)
- * Copyright (C) Hans-Joachim Hetscher DD8NE (dd8ne@bnv-bamberg.de)
- */
-#include <linux/errno.h>
-#include <linux/types.h>
-#include <linux/socket.h>
-#include <linux/in.h>
-#include <linux/kernel.h>
-#include <linux/timer.h>
-#include <linux/string.h>
-#include <linux/sockios.h>
-#include <linux/net.h>
-#include <linux/slab.h>
-#include <net/ax25.h>
-#include <linux/inet.h>
-#include <linux/netdevice.h>
-#include <linux/skbuff.h>
-#include <net/sock.h>
-#include <net/tcp_states.h>
-#include <linux/uaccess.h>
-#include <linux/fcntl.h>
-#include <linux/mm.h>
-#include <linux/interrupt.h>
-
-/*
- * Given a fragment, queue it on the fragment queue and if the fragment
- * is complete, send it back to ax25_rx_iframe.
- */
-static int ax25_rx_fragment(ax25_cb *ax25, struct sk_buff *skb)
-{
- struct sk_buff *skbn, *skbo;
-
- if (ax25->fragno != 0) {
- if (!(*skb->data & AX25_SEG_FIRST)) {
- if ((ax25->fragno - 1) == (*skb->data & AX25_SEG_REM)) {
- /* Enqueue fragment */
- ax25->fragno = *skb->data & AX25_SEG_REM;
- skb_pull(skb, 1); /* skip fragno */
- ax25->fraglen += skb->len;
- skb_queue_tail(&ax25->frag_queue, skb);
-
- /* Last fragment received ? */
- if (ax25->fragno == 0) {
- skbn = alloc_skb(AX25_MAX_HEADER_LEN +
- ax25->fraglen,
- GFP_ATOMIC);
- if (!skbn) {
- skb_queue_purge(&ax25->frag_queue);
- return 1;
- }
-
- skb_reserve(skbn, AX25_MAX_HEADER_LEN);
-
- skbn->dev = ax25->ax25_dev->dev;
- skb_reset_network_header(skbn);
- skb_reset_transport_header(skbn);
-
- /* Copy data from the fragments */
- while ((skbo = skb_dequeue(&ax25->frag_queue)) != NULL) {
- skb_copy_from_linear_data(skbo,
- skb_put(skbn, skbo->len),
- skbo->len);
- kfree_skb(skbo);
- }
-
- ax25->fraglen = 0;
-
- if (ax25_rx_iframe(ax25, skbn) == 0)
- kfree_skb(skbn);
- }
-
- return 1;
- }
- }
- } else {
- /* First fragment received */
- if (*skb->data & AX25_SEG_FIRST) {
- skb_queue_purge(&ax25->frag_queue);
- ax25->fragno = *skb->data & AX25_SEG_REM;
- skb_pull(skb, 1); /* skip fragno */
- ax25->fraglen = skb->len;
- skb_queue_tail(&ax25->frag_queue, skb);
- return 1;
- }
- }
-
- return 0;
-}
-
-/*
- * This is where all valid I frames are sent to, to be dispatched to
- * whichever protocol requires them.
- */
-int ax25_rx_iframe(ax25_cb *ax25, struct sk_buff *skb)
-{
- int (*func)(struct sk_buff *, ax25_cb *);
- unsigned char pid;
- int queued = 0;
-
- if (skb == NULL) return 0;
-
- ax25_start_idletimer(ax25);
-
- pid = *skb->data;
-
- if (pid == AX25_P_IP) {
- /* working around a TCP bug to keep additional listeners
- * happy. TCP re-uses the buffer and destroys the original
- * content.
- */
- struct sk_buff *skbn = skb_copy(skb, GFP_ATOMIC);
- if (skbn != NULL) {
- kfree_skb(skb);
- skb = skbn;
- }
-
- skb_pull(skb, 1); /* Remove PID */
- skb->mac_header = skb->network_header;
- skb_reset_network_header(skb);
- skb->dev = ax25->ax25_dev->dev;
- skb->pkt_type = PACKET_HOST;
- skb->protocol = htons(ETH_P_IP);
- netif_rx(skb);
- return 1;
- }
- if (pid == AX25_P_SEGMENT) {
- skb_pull(skb, 1); /* Remove PID */
- return ax25_rx_fragment(ax25, skb);
- }
-
- if ((func = ax25_protocol_function(pid)) != NULL) {
- skb_pull(skb, 1); /* Remove PID */
- return (*func)(skb, ax25);
- }
-
- if (ax25->sk != NULL && ax25->ax25_dev->values[AX25_VALUES_CONMODE] == 2) {
- if ((!ax25->pidincl && ax25->sk->sk_protocol == pid) ||
- ax25->pidincl) {
- if (sock_queue_rcv_skb(ax25->sk, skb) == 0)
- queued = 1;
- else
- ax25->condition |= AX25_COND_OWN_RX_BUSY;
- }
- }
-
- return queued;
-}
-
-/*
- * Higher level upcall for a LAPB frame
- */
-static int ax25_process_rx_frame(ax25_cb *ax25, struct sk_buff *skb, int type, int dama)
-{
- int queued = 0;
-
- if (ax25->state == AX25_STATE_0)
- return 0;
-
- switch (ax25->ax25_dev->values[AX25_VALUES_PROTOCOL]) {
- case AX25_PROTO_STD_SIMPLEX:
- case AX25_PROTO_STD_DUPLEX:
- queued = ax25_std_frame_in(ax25, skb, type);
- break;
-
-#ifdef CONFIG_AX25_DAMA_SLAVE
- case AX25_PROTO_DAMA_SLAVE:
- if (dama || ax25->ax25_dev->dama.slave)
- queued = ax25_ds_frame_in(ax25, skb, type);
- else
- queued = ax25_std_frame_in(ax25, skb, type);
- break;
-#endif
- }
-
- return queued;
-}
-
-static int ax25_rcv(struct sk_buff *skb, struct net_device *dev,
- const ax25_address *dev_addr, struct packet_type *ptype)
-{
- ax25_address src, dest, *next_digi = NULL;
- int type = 0, mine = 0, dama;
- struct sock *make, *sk;
- ax25_digi dp, reverse_dp;
- ax25_cb *ax25;
- ax25_dev *ax25_dev;
-
- /*
- * Process the AX.25/LAPB frame.
- */
-
- skb_reset_transport_header(skb);
-
- if ((ax25_dev = ax25_dev_ax25dev(dev)) == NULL)
- goto free;
-
- /*
- * Parse the address header.
- */
-
- if (ax25_addr_parse(skb->data, skb->len, &src, &dest, &dp, &type, &dama) == NULL)
- goto free;
-
- /*
- * Ours perhaps ?
- */
- if (dp.lastrepeat + 1 < dp.ndigi) /* Not yet digipeated completely */
- next_digi = &dp.calls[dp.lastrepeat + 1];
-
- /*
- * Pull of the AX.25 headers leaving the CTRL/PID bytes
- */
- skb_pull(skb, ax25_addr_size(&dp));
-
- /* For our port addresses ? */
- if (ax25cmp(&dest, dev_addr) == 0 && dp.lastrepeat + 1 == dp.ndigi)
- mine = 1;
-
- /* Also match on any registered callsign from L3/4 */
- if (!mine && ax25_listen_mine(&dest, dev) && dp.lastrepeat + 1 == dp.ndigi)
- mine = 1;
-
- /* UI frame - bypass LAPB processing */
- if ((*skb->data & ~0x10) == AX25_UI && dp.lastrepeat + 1 == dp.ndigi) {
- skb_set_transport_header(skb, 2); /* skip control and pid */
-
- ax25_send_to_raw(&dest, skb, skb->data[1]);
-
- if (!mine && ax25cmp(&dest, (ax25_address *)dev->broadcast) != 0)
- goto free;
-
- /* Now we are pointing at the pid byte */
- switch (skb->data[1]) {
- case AX25_P_IP:
- skb_pull(skb,2); /* drop PID/CTRL */
- skb_reset_transport_header(skb);
- skb_reset_network_header(skb);
- skb->dev = dev;
- skb->pkt_type = PACKET_HOST;
- skb->protocol = htons(ETH_P_IP);
- netif_rx(skb);
- break;
-
- case AX25_P_ARP:
- skb_pull(skb,2);
- skb_reset_transport_header(skb);
- skb_reset_network_header(skb);
- skb->dev = dev;
- skb->pkt_type = PACKET_HOST;
- skb->protocol = htons(ETH_P_ARP);
- netif_rx(skb);
- break;
- case AX25_P_TEXT:
- /* Now find a suitable dgram socket */
- sk = ax25_get_socket(&dest, &src, SOCK_DGRAM);
- if (sk != NULL) {
- bh_lock_sock(sk);
- if (atomic_read(&sk->sk_rmem_alloc) >=
- sk->sk_rcvbuf) {
- kfree_skb(skb);
- } else {
- /*
- * Remove the control and PID.
- */
- skb_pull(skb, 2);
- if (sock_queue_rcv_skb(sk, skb) != 0)
- kfree_skb(skb);
- }
- bh_unlock_sock(sk);
- sock_put(sk);
- } else {
- kfree_skb(skb);
- }
- break;
-
- default:
- kfree_skb(skb); /* Will scan SOCK_AX25 RAW sockets */
- break;
- }
-
- return 0;
- }
-
- /*
- * Is connected mode supported on this device ?
- * If not, should we DM the incoming frame (except DMs) or
- * silently ignore them. For now we stay quiet.
- */
- if (ax25_dev->values[AX25_VALUES_CONMODE] == 0)
- goto free;
-
- /* LAPB */
-
- /* AX.25 state 1-4 */
-
- ax25_digi_invert(&dp, &reverse_dp);
-
- if ((ax25 = ax25_find_cb(&dest, &src, &reverse_dp, dev)) != NULL) {
- /*
- * Process the frame. If it is queued up internally it
- * returns one otherwise we free it immediately. This
- * routine itself wakes the user context layers so we do
- * no further work
- */
- if (ax25_process_rx_frame(ax25, skb, type, dama) == 0)
- kfree_skb(skb);
-
- ax25_cb_put(ax25);
- return 0;
- }
-
- /* AX.25 state 0 (disconnected) */
-
- /* a) received not a SABM(E) */
-
- if ((*skb->data & ~AX25_PF) != AX25_SABM &&
- (*skb->data & ~AX25_PF) != AX25_SABME) {
- /*
- * Never reply to a DM. Also ignore any connects for
- * addresses that are not our interfaces and not a socket.
- */
- if ((*skb->data & ~AX25_PF) != AX25_DM && mine)
- ax25_return_dm(dev, &src, &dest, &dp);
-
- goto free;
- }
-
- /* b) received SABM(E) */
-
- if (dp.lastrepeat + 1 == dp.ndigi)
- sk = ax25_find_listener(&dest, 0, dev, SOCK_SEQPACKET);
- else
- sk = ax25_find_listener(next_digi, 1, dev, SOCK_SEQPACKET);
-
- if (sk != NULL) {
- bh_lock_sock(sk);
- if (sk_acceptq_is_full(sk) ||
- (make = ax25_make_new(sk, ax25_dev)) == NULL) {
- if (mine)
- ax25_return_dm(dev, &src, &dest, &dp);
- kfree_skb(skb);
- bh_unlock_sock(sk);
- sock_put(sk);
-
- return 0;
- }
-
- ax25 = sk_to_ax25(make);
- skb_set_owner_r(skb, make);
- skb_queue_head(&sk->sk_receive_queue, skb);
-
- make->sk_state = TCP_ESTABLISHED;
-
- sk_acceptq_added(sk);
- bh_unlock_sock(sk);
- } else {
- if (!mine)
- goto free;
-
- if ((ax25 = ax25_create_cb()) == NULL) {
- ax25_return_dm(dev, &src, &dest, &dp);
- goto free;
- }
-
- ax25_fillin_cb(ax25, ax25_dev);
- }
-
- ax25->source_addr = dest;
- ax25->dest_addr = src;
-
- /*
- * Sort out any digipeated paths.
- */
- if (dp.ndigi && !ax25->digipeat &&
- (ax25->digipeat = kmalloc_obj(ax25_digi, GFP_ATOMIC)) == NULL) {
- kfree_skb(skb);
- ax25_destroy_socket(ax25);
- if (sk)
- sock_put(sk);
- return 0;
- }
-
- if (dp.ndigi == 0) {
- kfree(ax25->digipeat);
- ax25->digipeat = NULL;
- } else {
- /* Reverse the source SABM's path */
- memcpy(ax25->digipeat, &reverse_dp, sizeof(ax25_digi));
- }
-
- if ((*skb->data & ~AX25_PF) == AX25_SABME) {
- ax25->modulus = AX25_EMODULUS;
- ax25->window = ax25_dev->values[AX25_VALUES_EWINDOW];
- } else {
- ax25->modulus = AX25_MODULUS;
- ax25->window = ax25_dev->values[AX25_VALUES_WINDOW];
- }
-
- ax25_send_control(ax25, AX25_UA, AX25_POLLON, AX25_RESPONSE);
-
-#ifdef CONFIG_AX25_DAMA_SLAVE
- if (dama && ax25->ax25_dev->values[AX25_VALUES_PROTOCOL] == AX25_PROTO_DAMA_SLAVE)
- ax25_dama_on(ax25);
-#endif
-
- ax25->state = AX25_STATE_3;
-
- ax25_cb_add(ax25);
-
- ax25_start_heartbeat(ax25);
- ax25_start_t3timer(ax25);
- ax25_start_idletimer(ax25);
-
- if (sk) {
- if (!sock_flag(sk, SOCK_DEAD))
- sk->sk_data_ready(sk);
- sock_put(sk);
- } else {
-free:
- kfree_skb(skb);
- }
- return 0;
-}
-
-/*
- * Receive an AX.25 frame via a SLIP interface.
- */
-int ax25_kiss_rcv(struct sk_buff *skb, struct net_device *dev,
- struct packet_type *ptype, struct net_device *orig_dev)
-{
- skb = skb_share_check(skb, GFP_ATOMIC);
- if (!skb)
- return NET_RX_DROP;
-
- skb_orphan(skb);
-
- if (!net_eq(dev_net(dev), &init_net)) {
- kfree_skb(skb);
- return 0;
- }
-
- if ((*skb->data & 0x0F) != 0) {
- kfree_skb(skb); /* Not a KISS data frame */
- return 0;
- }
-
- skb_pull(skb, AX25_KISS_HEADER_LEN); /* Remove the KISS byte */
-
- return ax25_rcv(skb, dev, (const ax25_address *)dev->dev_addr, ptype);
-}
+++ /dev/null
-// SPDX-License-Identifier: GPL-2.0-or-later
-/*
- *
- * Copyright (C) Jonathan Naylor G4KLX (g4klx@g4klx.demon.co.uk)
- */
-#include <linux/errno.h>
-#include <linux/types.h>
-#include <linux/socket.h>
-#include <linux/in.h>
-#include <linux/kernel.h>
-#include <linux/module.h>
-#include <linux/timer.h>
-#include <linux/string.h>
-#include <linux/sockios.h>
-#include <linux/net.h>
-#include <linux/slab.h>
-#include <net/ax25.h>
-#include <linux/inet.h>
-#include <linux/netdevice.h>
-#include <linux/if_arp.h>
-#include <linux/skbuff.h>
-#include <net/sock.h>
-#include <linux/uaccess.h>
-#include <linux/fcntl.h>
-#include <linux/termios.h> /* For TIOCINQ/OUTQ */
-#include <linux/mm.h>
-#include <linux/interrupt.h>
-#include <linux/notifier.h>
-#include <linux/proc_fs.h>
-#include <linux/stat.h>
-#include <linux/sysctl.h>
-#include <net/ip.h>
-#include <net/arp.h>
-
-/*
- * IP over AX.25 encapsulation.
- */
-
-/*
- * Shove an AX.25 UI header on an IP packet and handle ARP
- */
-
-#ifdef CONFIG_INET
-
-static int ax25_hard_header(struct sk_buff *skb, struct net_device *dev,
- unsigned short type, const void *daddr,
- const void *saddr, unsigned int len)
-{
- unsigned char *buff;
-
- /* they sometimes come back to us... */
- if (type == ETH_P_AX25)
- return 0;
-
- /* header is an AX.25 UI frame from us to them */
- buff = skb_push(skb, AX25_HEADER_LEN);
- *buff++ = 0x00; /* KISS DATA */
-
- if (daddr != NULL)
- memcpy(buff, daddr, dev->addr_len); /* Address specified */
-
- buff[6] &= ~AX25_CBIT;
- buff[6] &= ~AX25_EBIT;
- buff[6] |= AX25_SSSID_SPARE;
- buff += AX25_ADDR_LEN;
-
- if (saddr != NULL)
- memcpy(buff, saddr, dev->addr_len);
- else
- memcpy(buff, dev->dev_addr, dev->addr_len);
-
- buff[6] &= ~AX25_CBIT;
- buff[6] |= AX25_EBIT;
- buff[6] |= AX25_SSSID_SPARE;
- buff += AX25_ADDR_LEN;
-
- *buff++ = AX25_UI; /* UI */
-
- /* Append a suitable AX.25 PID */
- switch (type) {
- case ETH_P_IP:
- *buff++ = AX25_P_IP;
- break;
- case ETH_P_ARP:
- *buff++ = AX25_P_ARP;
- break;
- default:
- printk(KERN_ERR "AX.25: ax25_hard_header - wrong protocol type 0x%2.2x\n", type);
- *buff++ = 0;
- break;
- }
-
- if (daddr != NULL)
- return AX25_HEADER_LEN;
-
- return -AX25_HEADER_LEN; /* Unfinished header */
-}
-
-netdev_tx_t ax25_ip_xmit(struct sk_buff *skb)
-{
- struct sk_buff *ourskb;
- unsigned char *bp = skb->data;
- ax25_route *route;
- struct net_device *dev = NULL;
- ax25_address *src, *dst;
- ax25_digi *digipeat = NULL;
- ax25_dev *ax25_dev;
- ax25_cb *ax25;
- char ip_mode = ' ';
-
- dst = (ax25_address *)(bp + 1);
- src = (ax25_address *)(bp + 8);
-
- ax25_route_lock_use();
- route = ax25_get_route(dst, NULL);
- if (route) {
- digipeat = route->digipeat;
- dev = route->dev;
- ip_mode = route->ip_mode;
- }
-
- if (dev == NULL)
- dev = skb->dev;
-
- rcu_read_lock();
- if ((ax25_dev = ax25_dev_ax25dev(dev)) == NULL) {
- kfree_skb(skb);
- goto put;
- }
-
- if (bp[16] == AX25_P_IP) {
- if (ip_mode == 'V' || (ip_mode == ' ' && ax25_dev->values[AX25_VALUES_IPDEFMODE])) {
- /*
- * We copy the buffer and release the original thereby
- * keeping it straight
- *
- * Note: we report 1 back so the caller will
- * not feed the frame direct to the physical device
- * We don't want that to happen. (It won't be upset
- * as we have pulled the frame from the queue by
- * freeing it).
- *
- * NB: TCP modifies buffers that are still
- * on a device queue, thus we use skb_copy()
- * instead of using skb_clone() unless this
- * gets fixed.
- */
-
- ax25_address src_c;
- ax25_address dst_c;
-
- if ((ourskb = skb_copy(skb, GFP_ATOMIC)) == NULL) {
- kfree_skb(skb);
- goto put;
- }
-
- if (skb->sk != NULL)
- skb_set_owner_w(ourskb, skb->sk);
-
- kfree_skb(skb);
- /* dl9sau: bugfix
- * after kfree_skb(), dst and src which were pointer
- * to bp which is part of skb->data would not be valid
- * anymore hope that after skb_pull(ourskb, ..) our
- * dsc_c and src_c will not become invalid
- */
- bp = ourskb->data;
- dst_c = *(ax25_address *)(bp + 1);
- src_c = *(ax25_address *)(bp + 8);
-
- skb_pull(ourskb, AX25_HEADER_LEN - 1); /* Keep PID */
- skb_reset_network_header(ourskb);
-
- ax25=ax25_send_frame(
- ourskb,
- ax25_dev->values[AX25_VALUES_PACLEN],
- &src_c,
- &dst_c, digipeat, dev);
- if (ax25) {
- ax25_cb_put(ax25);
- }
- goto put;
- }
- }
-
- bp[7] &= ~AX25_CBIT;
- bp[7] &= ~AX25_EBIT;
- bp[7] |= AX25_SSSID_SPARE;
-
- bp[14] &= ~AX25_CBIT;
- bp[14] |= AX25_EBIT;
- bp[14] |= AX25_SSSID_SPARE;
-
- skb_pull(skb, AX25_KISS_HEADER_LEN);
-
- if (digipeat != NULL) {
- if ((ourskb = ax25_rt_build_path(skb, src, dst, route->digipeat)) == NULL)
- goto put;
-
- skb = ourskb;
- }
-
- ax25_queue_xmit(skb, dev);
-
-put:
- rcu_read_unlock();
- ax25_route_lock_unuse();
- return NETDEV_TX_OK;
-}
-
-#else /* INET */
-
-static int ax25_hard_header(struct sk_buff *skb, struct net_device *dev,
- unsigned short type, const void *daddr,
- const void *saddr, unsigned int len)
-{
- return -AX25_HEADER_LEN;
-}
-
-netdev_tx_t ax25_ip_xmit(struct sk_buff *skb)
-{
- kfree_skb(skb);
- return NETDEV_TX_OK;
-}
-#endif
-
-static bool ax25_validate_header(const char *header, unsigned int len)
-{
- ax25_digi digi;
-
- if (!len)
- return false;
-
- if (header[0])
- return true;
-
- return ax25_addr_parse(header + 1, len - 1, NULL, NULL, &digi, NULL,
- NULL);
-}
-
-const struct header_ops ax25_header_ops = {
- .create = ax25_hard_header,
- .validate = ax25_validate_header,
-};
-
-EXPORT_SYMBOL(ax25_header_ops);
-EXPORT_SYMBOL(ax25_ip_xmit);
+++ /dev/null
-// SPDX-License-Identifier: GPL-2.0-or-later
-/*
- *
- * Copyright (C) Alan Cox GW4PTS (alan@lxorguk.ukuu.org.uk)
- * Copyright (C) Jonathan Naylor G4KLX (g4klx@g4klx.demon.co.uk)
- * Copyright (C) Joerg Reuter DL1BKE (jreuter@yaina.de)
- */
-#include <linux/errno.h>
-#include <linux/types.h>
-#include <linux/socket.h>
-#include <linux/in.h>
-#include <linux/kernel.h>
-#include <linux/module.h>
-#include <linux/timer.h>
-#include <linux/string.h>
-#include <linux/sockios.h>
-#include <linux/spinlock.h>
-#include <linux/net.h>
-#include <linux/slab.h>
-#include <net/ax25.h>
-#include <linux/inet.h>
-#include <linux/netdevice.h>
-#include <linux/skbuff.h>
-#include <net/sock.h>
-#include <linux/uaccess.h>
-#include <linux/fcntl.h>
-#include <linux/mm.h>
-#include <linux/interrupt.h>
-
-static DEFINE_SPINLOCK(ax25_frag_lock);
-
-ax25_cb *ax25_send_frame(struct sk_buff *skb, int paclen, const ax25_address *src, ax25_address *dest, ax25_digi *digi, struct net_device *dev)
-{
- ax25_dev *ax25_dev;
- ax25_cb *ax25;
-
- /*
- * Take the default packet length for the device if zero is
- * specified.
- */
- if (paclen == 0) {
- rcu_read_lock();
- ax25_dev = ax25_dev_ax25dev(dev);
- if (!ax25_dev) {
- rcu_read_unlock();
- return NULL;
- }
- paclen = ax25_dev->values[AX25_VALUES_PACLEN];
- rcu_read_unlock();
- }
-
- /*
- * Look for an existing connection.
- */
- if ((ax25 = ax25_find_cb(src, dest, digi, dev)) != NULL) {
- ax25_output(ax25, paclen, skb);
- return ax25; /* It already existed */
- }
-
- rcu_read_lock();
- ax25_dev = ax25_dev_ax25dev(dev);
- if (!ax25_dev) {
- rcu_read_unlock();
- return NULL;
- }
-
- if ((ax25 = ax25_create_cb()) == NULL) {
- rcu_read_unlock();
- return NULL;
- }
- ax25_fillin_cb(ax25, ax25_dev);
- rcu_read_unlock();
-
- ax25->source_addr = *src;
- ax25->dest_addr = *dest;
-
- if (digi != NULL) {
- ax25->digipeat = kmemdup(digi, sizeof(*digi), GFP_ATOMIC);
- if (ax25->digipeat == NULL) {
- ax25_cb_put(ax25);
- return NULL;
- }
- }
-
- switch (ax25->ax25_dev->values[AX25_VALUES_PROTOCOL]) {
- case AX25_PROTO_STD_SIMPLEX:
- case AX25_PROTO_STD_DUPLEX:
- ax25_std_establish_data_link(ax25);
- break;
-
-#ifdef CONFIG_AX25_DAMA_SLAVE
- case AX25_PROTO_DAMA_SLAVE:
- if (ax25_dev->dama.slave)
- ax25_ds_establish_data_link(ax25);
- else
- ax25_std_establish_data_link(ax25);
- break;
-#endif
- }
-
- /*
- * There is one ref for the state machine; a caller needs
- * one more to put it back, just like with the existing one.
- */
- ax25_cb_hold(ax25);
-
- ax25_cb_add(ax25);
-
- ax25->state = AX25_STATE_1;
-
- ax25_start_heartbeat(ax25);
-
- ax25_output(ax25, paclen, skb);
-
- return ax25; /* We had to create it */
-}
-
-EXPORT_SYMBOL(ax25_send_frame);
-
-/*
- * All outgoing AX.25 I frames pass via this routine. Therefore this is
- * where the fragmentation of frames takes place. If fragment is set to
- * zero then we are not allowed to do fragmentation, even if the frame
- * is too large.
- */
-void ax25_output(ax25_cb *ax25, int paclen, struct sk_buff *skb)
-{
- struct sk_buff *skbn;
- unsigned char *p;
- int frontlen, len, fragno, ka9qfrag, first = 1;
-
- if (paclen < 16) {
- WARN_ON_ONCE(1);
- kfree_skb(skb);
- return;
- }
-
- if ((skb->len - 1) > paclen) {
- if (*skb->data == AX25_P_TEXT) {
- skb_pull(skb, 1); /* skip PID */
- ka9qfrag = 0;
- } else {
- paclen -= 2; /* Allow for fragment control info */
- ka9qfrag = 1;
- }
-
- fragno = skb->len / paclen;
- if (skb->len % paclen == 0) fragno--;
-
- frontlen = skb_headroom(skb); /* Address space + CTRL */
-
- while (skb->len > 0) {
- spin_lock_bh(&ax25_frag_lock);
- if ((skbn = alloc_skb(paclen + 2 + frontlen, GFP_ATOMIC)) == NULL) {
- spin_unlock_bh(&ax25_frag_lock);
- printk(KERN_CRIT "AX.25: ax25_output - out of memory\n");
- return;
- }
-
- if (skb->sk != NULL)
- skb_set_owner_w(skbn, skb->sk);
-
- spin_unlock_bh(&ax25_frag_lock);
-
- len = (paclen > skb->len) ? skb->len : paclen;
-
- if (ka9qfrag == 1) {
- skb_reserve(skbn, frontlen + 2);
- skb_set_network_header(skbn,
- skb_network_offset(skb));
- skb_copy_from_linear_data(skb, skb_put(skbn, len), len);
- p = skb_push(skbn, 2);
-
- *p++ = AX25_P_SEGMENT;
-
- *p = fragno--;
- if (first) {
- *p |= AX25_SEG_FIRST;
- first = 0;
- }
- } else {
- skb_reserve(skbn, frontlen + 1);
- skb_set_network_header(skbn,
- skb_network_offset(skb));
- skb_copy_from_linear_data(skb, skb_put(skbn, len), len);
- p = skb_push(skbn, 1);
- *p = AX25_P_TEXT;
- }
-
- skb_pull(skb, len);
- skb_queue_tail(&ax25->write_queue, skbn); /* Throw it on the queue */
- }
-
- kfree_skb(skb);
- } else {
- skb_queue_tail(&ax25->write_queue, skb); /* Throw it on the queue */
- }
-
- switch (ax25->ax25_dev->values[AX25_VALUES_PROTOCOL]) {
- case AX25_PROTO_STD_SIMPLEX:
- case AX25_PROTO_STD_DUPLEX:
- ax25_kick(ax25);
- break;
-
-#ifdef CONFIG_AX25_DAMA_SLAVE
- /*
- * A DAMA slave is _required_ to work as normal AX.25L2V2
- * if no DAMA master is available.
- */
- case AX25_PROTO_DAMA_SLAVE:
- if (!ax25->ax25_dev->dama.slave) ax25_kick(ax25);
- break;
-#endif
- }
-}
-
-/*
- * This procedure is passed a buffer descriptor for an iframe. It builds
- * the rest of the control part of the frame and then writes it out.
- */
-static void ax25_send_iframe(ax25_cb *ax25, struct sk_buff *skb, int poll_bit)
-{
- unsigned char *frame;
-
- if (skb == NULL)
- return;
-
- skb_reset_network_header(skb);
-
- if (ax25->modulus == AX25_MODULUS) {
- frame = skb_push(skb, 1);
-
- *frame = AX25_I;
- *frame |= (poll_bit) ? AX25_PF : 0;
- *frame |= (ax25->vr << 5);
- *frame |= (ax25->vs << 1);
- } else {
- frame = skb_push(skb, 2);
-
- frame[0] = AX25_I;
- frame[0] |= (ax25->vs << 1);
- frame[1] = (poll_bit) ? AX25_EPF : 0;
- frame[1] |= (ax25->vr << 1);
- }
-
- ax25_start_idletimer(ax25);
-
- ax25_transmit_buffer(ax25, skb, AX25_COMMAND);
-}
-
-void ax25_kick(ax25_cb *ax25)
-{
- struct sk_buff *skb, *skbn;
- int last = 1;
- unsigned short start, end, next;
-
- if (ax25->state != AX25_STATE_3 && ax25->state != AX25_STATE_4)
- return;
-
- if (ax25->condition & AX25_COND_PEER_RX_BUSY)
- return;
-
- if (skb_peek(&ax25->write_queue) == NULL)
- return;
-
- start = (skb_peek(&ax25->ack_queue) == NULL) ? ax25->va : ax25->vs;
- end = (ax25->va + ax25->window) % ax25->modulus;
-
- if (start == end)
- return;
-
- /*
- * Transmit data until either we're out of data to send or
- * the window is full. Send a poll on the final I frame if
- * the window is filled.
- */
-
- /*
- * Dequeue the frame and copy it.
- * Check for race with ax25_clear_queues().
- */
- skb = skb_dequeue(&ax25->write_queue);
- if (!skb)
- return;
-
- ax25->vs = start;
-
- do {
- if ((skbn = skb_clone(skb, GFP_ATOMIC)) == NULL) {
- skb_queue_head(&ax25->write_queue, skb);
- break;
- }
-
- if (skb->sk != NULL)
- skb_set_owner_w(skbn, skb->sk);
-
- next = (ax25->vs + 1) % ax25->modulus;
- last = (next == end);
-
- /*
- * Transmit the frame copy.
- * bke 960114: do not set the Poll bit on the last frame
- * in DAMA mode.
- */
- switch (ax25->ax25_dev->values[AX25_VALUES_PROTOCOL]) {
- case AX25_PROTO_STD_SIMPLEX:
- case AX25_PROTO_STD_DUPLEX:
- ax25_send_iframe(ax25, skbn, (last) ? AX25_POLLON : AX25_POLLOFF);
- break;
-
-#ifdef CONFIG_AX25_DAMA_SLAVE
- case AX25_PROTO_DAMA_SLAVE:
- ax25_send_iframe(ax25, skbn, AX25_POLLOFF);
- break;
-#endif
- }
-
- ax25->vs = next;
-
- /*
- * Requeue the original data frame.
- */
- skb_queue_tail(&ax25->ack_queue, skb);
-
- } while (!last && (skb = skb_dequeue(&ax25->write_queue)) != NULL);
-
- ax25->condition &= ~AX25_COND_ACK_PENDING;
-
- if (!ax25_t1timer_running(ax25)) {
- ax25_stop_t3timer(ax25);
- ax25_calculate_t1(ax25);
- ax25_start_t1timer(ax25);
- }
-}
-
-void ax25_transmit_buffer(ax25_cb *ax25, struct sk_buff *skb, int type)
-{
- unsigned char *ptr;
- int headroom;
-
- if (ax25->ax25_dev == NULL) {
- ax25_disconnect(ax25, ENETUNREACH);
- return;
- }
-
- headroom = ax25_addr_size(ax25->digipeat);
-
- if (unlikely(skb_headroom(skb) < headroom)) {
- skb = skb_expand_head(skb, headroom);
- if (!skb) {
- printk(KERN_CRIT "AX.25: ax25_transmit_buffer - out of memory\n");
- return;
- }
- }
-
- ptr = skb_push(skb, headroom);
-
- ax25_addr_build(ptr, &ax25->source_addr, &ax25->dest_addr, ax25->digipeat, type, ax25->modulus);
-
- ax25_queue_xmit(skb, ax25->ax25_dev->dev);
-}
-
-/*
- * A small shim to dev_queue_xmit to add the KISS control byte, and do
- * any packet forwarding in operation.
- */
-void ax25_queue_xmit(struct sk_buff *skb, struct net_device *dev)
-{
- unsigned char *ptr;
-
- rcu_read_lock();
- skb->protocol = ax25_type_trans(skb, ax25_fwd_dev(dev));
- rcu_read_unlock();
-
- ptr = skb_push(skb, 1);
- *ptr = 0x00; /* KISS */
-
- dev_queue_xmit(skb);
-}
-
-int ax25_check_iframes_acked(ax25_cb *ax25, unsigned short nr)
-{
- if (ax25->vs == nr) {
- ax25_frames_acked(ax25, nr);
- ax25_calculate_rtt(ax25);
- ax25_stop_t1timer(ax25);
- ax25_start_t3timer(ax25);
- return 1;
- } else {
- if (ax25->va != nr) {
- ax25_frames_acked(ax25, nr);
- ax25_calculate_t1(ax25);
- ax25_start_t1timer(ax25);
- return 1;
- }
- }
- return 0;
-}
+++ /dev/null
-// SPDX-License-Identifier: GPL-2.0-or-later
-/*
- *
- * Copyright (C) Alan Cox GW4PTS (alan@lxorguk.ukuu.org.uk)
- * Copyright (C) Jonathan Naylor G4KLX (g4klx@g4klx.demon.co.uk)
- * Copyright (C) Steven Whitehouse GW7RRM (stevew@acm.org)
- * Copyright (C) Joerg Reuter DL1BKE (jreuter@yaina.de)
- * Copyright (C) Hans-Joachim Hetscher DD8NE (dd8ne@bnv-bamberg.de)
- * Copyright (C) Frederic Rible F1OAT (frible@teaser.fr)
- */
-
-#include <linux/capability.h>
-#include <linux/errno.h>
-#include <linux/types.h>
-#include <linux/socket.h>
-#include <linux/timer.h>
-#include <linux/in.h>
-#include <linux/kernel.h>
-#include <linux/sched.h>
-#include <linux/string.h>
-#include <linux/sockios.h>
-#include <linux/net.h>
-#include <linux/slab.h>
-#include <net/ax25.h>
-#include <linux/inet.h>
-#include <linux/netdevice.h>
-#include <linux/if_arp.h>
-#include <linux/skbuff.h>
-#include <linux/spinlock.h>
-#include <net/sock.h>
-#include <linux/uaccess.h>
-#include <linux/fcntl.h>
-#include <linux/mm.h>
-#include <linux/interrupt.h>
-#include <linux/init.h>
-#include <linux/seq_file.h>
-#include <linux/export.h>
-
-static ax25_route *ax25_route_list;
-DEFINE_RWLOCK(ax25_route_lock);
-
-void ax25_rt_device_down(struct net_device *dev)
-{
- ax25_route *s, *t, *ax25_rt;
-
- write_lock_bh(&ax25_route_lock);
- ax25_rt = ax25_route_list;
- while (ax25_rt != NULL) {
- s = ax25_rt;
- ax25_rt = ax25_rt->next;
-
- if (s->dev == dev) {
- if (ax25_route_list == s) {
- ax25_route_list = s->next;
- kfree(s->digipeat);
- kfree(s);
- } else {
- for (t = ax25_route_list; t != NULL; t = t->next) {
- if (t->next == s) {
- t->next = s->next;
- kfree(s->digipeat);
- kfree(s);
- break;
- }
- }
- }
- }
- }
- write_unlock_bh(&ax25_route_lock);
-}
-
-static int __must_check ax25_rt_add(struct ax25_routes_struct *route)
-{
- ax25_route *ax25_rt;
- ax25_dev *ax25_dev;
- int i;
-
- if (route->digi_count > AX25_MAX_DIGIS)
- return -EINVAL;
-
- ax25_dev = ax25_addr_ax25dev(&route->port_addr);
- if (!ax25_dev)
- return -EINVAL;
-
- write_lock_bh(&ax25_route_lock);
-
- ax25_rt = ax25_route_list;
- while (ax25_rt != NULL) {
- if (ax25cmp(&ax25_rt->callsign, &route->dest_addr) == 0 &&
- ax25_rt->dev == ax25_dev->dev) {
- kfree(ax25_rt->digipeat);
- ax25_rt->digipeat = NULL;
- if (route->digi_count != 0) {
- if ((ax25_rt->digipeat = kmalloc_obj(ax25_digi, GFP_ATOMIC)) == NULL) {
- write_unlock_bh(&ax25_route_lock);
- ax25_dev_put(ax25_dev);
- return -ENOMEM;
- }
- ax25_rt->digipeat->lastrepeat = -1;
- ax25_rt->digipeat->ndigi = route->digi_count;
- for (i = 0; i < route->digi_count; i++) {
- ax25_rt->digipeat->repeated[i] = 0;
- ax25_rt->digipeat->calls[i] = route->digi_addr[i];
- }
- }
- write_unlock_bh(&ax25_route_lock);
- ax25_dev_put(ax25_dev);
- return 0;
- }
- ax25_rt = ax25_rt->next;
- }
-
- if ((ax25_rt = kmalloc_obj(ax25_route, GFP_ATOMIC)) == NULL) {
- write_unlock_bh(&ax25_route_lock);
- ax25_dev_put(ax25_dev);
- return -ENOMEM;
- }
-
- ax25_rt->callsign = route->dest_addr;
- ax25_rt->dev = ax25_dev->dev;
- ax25_rt->digipeat = NULL;
- ax25_rt->ip_mode = ' ';
- if (route->digi_count != 0) {
- if ((ax25_rt->digipeat = kmalloc_obj(ax25_digi, GFP_ATOMIC)) == NULL) {
- write_unlock_bh(&ax25_route_lock);
- kfree(ax25_rt);
- ax25_dev_put(ax25_dev);
- return -ENOMEM;
- }
- ax25_rt->digipeat->lastrepeat = -1;
- ax25_rt->digipeat->ndigi = route->digi_count;
- for (i = 0; i < route->digi_count; i++) {
- ax25_rt->digipeat->repeated[i] = 0;
- ax25_rt->digipeat->calls[i] = route->digi_addr[i];
- }
- }
- ax25_rt->next = ax25_route_list;
- ax25_route_list = ax25_rt;
- write_unlock_bh(&ax25_route_lock);
- ax25_dev_put(ax25_dev);
-
- return 0;
-}
-
-void __ax25_put_route(ax25_route *ax25_rt)
-{
- kfree(ax25_rt->digipeat);
- kfree(ax25_rt);
-}
-
-static int ax25_rt_del(struct ax25_routes_struct *route)
-{
- ax25_route *s, *t, *ax25_rt;
- ax25_dev *ax25_dev;
-
- if ((ax25_dev = ax25_addr_ax25dev(&route->port_addr)) == NULL)
- return -EINVAL;
-
- write_lock_bh(&ax25_route_lock);
-
- ax25_rt = ax25_route_list;
- while (ax25_rt != NULL) {
- s = ax25_rt;
- ax25_rt = ax25_rt->next;
- if (s->dev == ax25_dev->dev &&
- ax25cmp(&route->dest_addr, &s->callsign) == 0) {
- if (ax25_route_list == s) {
- ax25_route_list = s->next;
- __ax25_put_route(s);
- } else {
- for (t = ax25_route_list; t != NULL; t = t->next) {
- if (t->next == s) {
- t->next = s->next;
- __ax25_put_route(s);
- break;
- }
- }
- }
- }
- }
- write_unlock_bh(&ax25_route_lock);
- ax25_dev_put(ax25_dev);
-
- return 0;
-}
-
-static int ax25_rt_opt(struct ax25_route_opt_struct *rt_option)
-{
- ax25_route *ax25_rt;
- ax25_dev *ax25_dev;
- int err = 0;
-
- if ((ax25_dev = ax25_addr_ax25dev(&rt_option->port_addr)) == NULL)
- return -EINVAL;
-
- write_lock_bh(&ax25_route_lock);
-
- ax25_rt = ax25_route_list;
- while (ax25_rt != NULL) {
- if (ax25_rt->dev == ax25_dev->dev &&
- ax25cmp(&rt_option->dest_addr, &ax25_rt->callsign) == 0) {
- switch (rt_option->cmd) {
- case AX25_SET_RT_IPMODE:
- switch (rt_option->arg) {
- case ' ':
- case 'D':
- case 'V':
- ax25_rt->ip_mode = rt_option->arg;
- break;
- default:
- err = -EINVAL;
- goto out;
- }
- break;
- default:
- err = -EINVAL;
- goto out;
- }
- }
- ax25_rt = ax25_rt->next;
- }
-
-out:
- write_unlock_bh(&ax25_route_lock);
- ax25_dev_put(ax25_dev);
- return err;
-}
-
-int ax25_rt_ioctl(unsigned int cmd, void __user *arg)
-{
- struct ax25_route_opt_struct rt_option;
- struct ax25_routes_struct route;
-
- switch (cmd) {
- case SIOCADDRT:
- if (copy_from_user(&route, arg, sizeof(route)))
- return -EFAULT;
- return ax25_rt_add(&route);
-
- case SIOCDELRT:
- if (copy_from_user(&route, arg, sizeof(route)))
- return -EFAULT;
- return ax25_rt_del(&route);
-
- case SIOCAX25OPTRT:
- if (copy_from_user(&rt_option, arg, sizeof(rt_option)))
- return -EFAULT;
- return ax25_rt_opt(&rt_option);
-
- default:
- return -EINVAL;
- }
-}
-
-#ifdef CONFIG_PROC_FS
-
-static void *ax25_rt_seq_start(struct seq_file *seq, loff_t *pos)
- __acquires(ax25_route_lock)
-{
- struct ax25_route *ax25_rt;
- int i = 1;
-
- read_lock(&ax25_route_lock);
- if (*pos == 0)
- return SEQ_START_TOKEN;
-
- for (ax25_rt = ax25_route_list; ax25_rt != NULL; ax25_rt = ax25_rt->next) {
- if (i == *pos)
- return ax25_rt;
- ++i;
- }
-
- return NULL;
-}
-
-static void *ax25_rt_seq_next(struct seq_file *seq, void *v, loff_t *pos)
-{
- ++*pos;
- return (v == SEQ_START_TOKEN) ? ax25_route_list :
- ((struct ax25_route *) v)->next;
-}
-
-static void ax25_rt_seq_stop(struct seq_file *seq, void *v)
- __releases(ax25_route_lock)
-{
- read_unlock(&ax25_route_lock);
-}
-
-static int ax25_rt_seq_show(struct seq_file *seq, void *v)
-{
- char buf[11];
-
- if (v == SEQ_START_TOKEN)
- seq_puts(seq, "callsign dev mode digipeaters\n");
- else {
- struct ax25_route *ax25_rt = v;
- const char *callsign;
- int i;
-
- if (ax25cmp(&ax25_rt->callsign, &null_ax25_address) == 0)
- callsign = "default";
- else
- callsign = ax2asc(buf, &ax25_rt->callsign);
-
- seq_printf(seq, "%-9s %-4s",
- callsign,
- ax25_rt->dev ? ax25_rt->dev->name : "???");
-
- switch (ax25_rt->ip_mode) {
- case 'V':
- seq_puts(seq, " vc");
- break;
- case 'D':
- seq_puts(seq, " dg");
- break;
- default:
- seq_puts(seq, " *");
- break;
- }
-
- if (ax25_rt->digipeat != NULL)
- for (i = 0; i < ax25_rt->digipeat->ndigi; i++)
- seq_printf(seq, " %s",
- ax2asc(buf, &ax25_rt->digipeat->calls[i]));
-
- seq_puts(seq, "\n");
- }
- return 0;
-}
-
-const struct seq_operations ax25_rt_seqops = {
- .start = ax25_rt_seq_start,
- .next = ax25_rt_seq_next,
- .stop = ax25_rt_seq_stop,
- .show = ax25_rt_seq_show,
-};
-#endif
-
-/*
- * Find AX.25 route
- *
- * Only routes with a reference count of zero can be destroyed.
- * Must be called with ax25_route_lock read locked.
- */
-ax25_route *ax25_get_route(ax25_address *addr, struct net_device *dev)
-{
- ax25_route *ax25_spe_rt = NULL;
- ax25_route *ax25_def_rt = NULL;
- ax25_route *ax25_rt;
-
- /*
- * Bind to the physical interface we heard them on, or the default
- * route if none is found;
- */
- for (ax25_rt = ax25_route_list; ax25_rt != NULL; ax25_rt = ax25_rt->next) {
- if (dev == NULL) {
- if (ax25cmp(&ax25_rt->callsign, addr) == 0 && ax25_rt->dev != NULL)
- ax25_spe_rt = ax25_rt;
- if (ax25cmp(&ax25_rt->callsign, &null_ax25_address) == 0 && ax25_rt->dev != NULL)
- ax25_def_rt = ax25_rt;
- } else {
- if (ax25cmp(&ax25_rt->callsign, addr) == 0 && ax25_rt->dev == dev)
- ax25_spe_rt = ax25_rt;
- if (ax25cmp(&ax25_rt->callsign, &null_ax25_address) == 0 && ax25_rt->dev == dev)
- ax25_def_rt = ax25_rt;
- }
- }
-
- ax25_rt = ax25_def_rt;
- if (ax25_spe_rt != NULL)
- ax25_rt = ax25_spe_rt;
-
- return ax25_rt;
-}
-
-
-struct sk_buff *ax25_rt_build_path(struct sk_buff *skb, ax25_address *src,
- ax25_address *dest, ax25_digi *digi)
-{
- unsigned char *bp;
- int len;
-
- len = digi->ndigi * AX25_ADDR_LEN;
-
- if (unlikely(skb_headroom(skb) < len)) {
- skb = skb_expand_head(skb, len);
- if (!skb) {
- printk(KERN_CRIT "AX.25: ax25_dg_build_path - out of memory\n");
- return NULL;
- }
- }
-
- bp = skb_push(skb, len);
-
- ax25_addr_build(bp, src, dest, digi, AX25_COMMAND, AX25_MODULUS);
-
- return skb;
-}
-
-/*
- * Free all memory associated with routing structures.
- */
-void __exit ax25_rt_free(void)
-{
- ax25_route *s, *ax25_rt = ax25_route_list;
-
- write_lock_bh(&ax25_route_lock);
- while (ax25_rt != NULL) {
- s = ax25_rt;
- ax25_rt = ax25_rt->next;
-
- kfree(s->digipeat);
- kfree(s);
- }
- write_unlock_bh(&ax25_route_lock);
-}
+++ /dev/null
-// SPDX-License-Identifier: GPL-2.0-or-later
-/*
- *
- * Copyright (C) Alan Cox GW4PTS (alan@lxorguk.ukuu.org.uk)
- * Copyright (C) Jonathan Naylor G4KLX (g4klx@g4klx.demon.co.uk)
- * Copyright (C) Joerg Reuter DL1BKE (jreuter@yaina.de)
- * Copyright (C) Hans-Joachim Hetscher DD8NE (dd8ne@bnv-bamberg.de)
- *
- * Most of this code is based on the SDL diagrams published in the 7th ARRL
- * Computer Networking Conference papers. The diagrams have mistakes in them,
- * but are mostly correct. Before you modify the code could you read the SDL
- * diagrams as the code is not obvious and probably very easy to break.
- */
-#include <linux/errno.h>
-#include <linux/types.h>
-#include <linux/socket.h>
-#include <linux/in.h>
-#include <linux/kernel.h>
-#include <linux/timer.h>
-#include <linux/string.h>
-#include <linux/sockios.h>
-#include <linux/net.h>
-#include <net/ax25.h>
-#include <linux/inet.h>
-#include <linux/netdevice.h>
-#include <linux/skbuff.h>
-#include <net/sock.h>
-#include <net/tcp_states.h>
-#include <linux/uaccess.h>
-#include <linux/fcntl.h>
-#include <linux/mm.h>
-#include <linux/interrupt.h>
-
-/*
- * State machine for state 1, Awaiting Connection State.
- * The handling of the timer(s) is in file ax25_std_timer.c.
- * Handling of state 0 and connection release is in ax25.c.
- */
-static int ax25_std_state1_machine(ax25_cb *ax25, struct sk_buff *skb, int frametype, int pf, int type)
-{
- switch (frametype) {
- case AX25_SABM:
- ax25->modulus = AX25_MODULUS;
- ax25->window = ax25->ax25_dev->values[AX25_VALUES_WINDOW];
- ax25_send_control(ax25, AX25_UA, pf, AX25_RESPONSE);
- break;
-
- case AX25_SABME:
- ax25->modulus = AX25_EMODULUS;
- ax25->window = ax25->ax25_dev->values[AX25_VALUES_EWINDOW];
- ax25_send_control(ax25, AX25_UA, pf, AX25_RESPONSE);
- break;
-
- case AX25_DISC:
- ax25_send_control(ax25, AX25_DM, pf, AX25_RESPONSE);
- break;
-
- case AX25_UA:
- if (pf) {
- ax25_calculate_rtt(ax25);
- ax25_stop_t1timer(ax25);
- ax25_start_t3timer(ax25);
- ax25_start_idletimer(ax25);
- ax25->vs = 0;
- ax25->va = 0;
- ax25->vr = 0;
- ax25->state = AX25_STATE_3;
- ax25->n2count = 0;
- if (ax25->sk != NULL) {
- bh_lock_sock(ax25->sk);
- ax25->sk->sk_state = TCP_ESTABLISHED;
- /* For WAIT_SABM connections we will produce an accept ready socket here */
- if (!sock_flag(ax25->sk, SOCK_DEAD))
- ax25->sk->sk_state_change(ax25->sk);
- bh_unlock_sock(ax25->sk);
- }
- }
- break;
-
- case AX25_DM:
- if (pf) {
- if (ax25->modulus == AX25_MODULUS) {
- ax25_disconnect(ax25, ECONNREFUSED);
- } else {
- ax25->modulus = AX25_MODULUS;
- ax25->window = ax25->ax25_dev->values[AX25_VALUES_WINDOW];
- }
- }
- break;
-
- default:
- break;
- }
-
- return 0;
-}
-
-/*
- * State machine for state 2, Awaiting Release State.
- * The handling of the timer(s) is in file ax25_std_timer.c
- * Handling of state 0 and connection release is in ax25.c.
- */
-static int ax25_std_state2_machine(ax25_cb *ax25, struct sk_buff *skb, int frametype, int pf, int type)
-{
- switch (frametype) {
- case AX25_SABM:
- case AX25_SABME:
- ax25_send_control(ax25, AX25_DM, pf, AX25_RESPONSE);
- break;
-
- case AX25_DISC:
- ax25_send_control(ax25, AX25_UA, pf, AX25_RESPONSE);
- ax25_disconnect(ax25, 0);
- break;
-
- case AX25_DM:
- case AX25_UA:
- if (pf)
- ax25_disconnect(ax25, 0);
- break;
-
- case AX25_I:
- case AX25_REJ:
- case AX25_RNR:
- case AX25_RR:
- if (pf) ax25_send_control(ax25, AX25_DM, AX25_POLLON, AX25_RESPONSE);
- break;
-
- default:
- break;
- }
-
- return 0;
-}
-
-/*
- * State machine for state 3, Connected State.
- * The handling of the timer(s) is in file ax25_std_timer.c
- * Handling of state 0 and connection release is in ax25.c.
- */
-static int ax25_std_state3_machine(ax25_cb *ax25, struct sk_buff *skb, int frametype, int ns, int nr, int pf, int type)
-{
- int queued = 0;
-
- switch (frametype) {
- case AX25_SABM:
- case AX25_SABME:
- if (frametype == AX25_SABM) {
- ax25->modulus = AX25_MODULUS;
- ax25->window = ax25->ax25_dev->values[AX25_VALUES_WINDOW];
- } else {
- ax25->modulus = AX25_EMODULUS;
- ax25->window = ax25->ax25_dev->values[AX25_VALUES_EWINDOW];
- }
- ax25_send_control(ax25, AX25_UA, pf, AX25_RESPONSE);
- ax25_stop_t1timer(ax25);
- ax25_stop_t2timer(ax25);
- ax25_start_t3timer(ax25);
- ax25_start_idletimer(ax25);
- ax25->condition = 0x00;
- ax25->vs = 0;
- ax25->va = 0;
- ax25->vr = 0;
- ax25_requeue_frames(ax25);
- break;
-
- case AX25_DISC:
- ax25_send_control(ax25, AX25_UA, pf, AX25_RESPONSE);
- ax25_disconnect(ax25, 0);
- break;
-
- case AX25_DM:
- ax25_disconnect(ax25, ECONNRESET);
- break;
-
- case AX25_RR:
- case AX25_RNR:
- if (frametype == AX25_RR)
- ax25->condition &= ~AX25_COND_PEER_RX_BUSY;
- else
- ax25->condition |= AX25_COND_PEER_RX_BUSY;
- if (type == AX25_COMMAND && pf)
- ax25_std_enquiry_response(ax25);
- if (ax25_validate_nr(ax25, nr)) {
- ax25_check_iframes_acked(ax25, nr);
- } else {
- ax25_std_nr_error_recovery(ax25);
- ax25->state = AX25_STATE_1;
- }
- break;
-
- case AX25_REJ:
- ax25->condition &= ~AX25_COND_PEER_RX_BUSY;
- if (type == AX25_COMMAND && pf)
- ax25_std_enquiry_response(ax25);
- if (ax25_validate_nr(ax25, nr)) {
- ax25_frames_acked(ax25, nr);
- ax25_calculate_rtt(ax25);
- ax25_stop_t1timer(ax25);
- ax25_start_t3timer(ax25);
- ax25_requeue_frames(ax25);
- } else {
- ax25_std_nr_error_recovery(ax25);
- ax25->state = AX25_STATE_1;
- }
- break;
-
- case AX25_I:
- if (!ax25_validate_nr(ax25, nr)) {
- ax25_std_nr_error_recovery(ax25);
- ax25->state = AX25_STATE_1;
- break;
- }
- if (ax25->condition & AX25_COND_PEER_RX_BUSY) {
- ax25_frames_acked(ax25, nr);
- } else {
- ax25_check_iframes_acked(ax25, nr);
- }
- if (ax25->condition & AX25_COND_OWN_RX_BUSY) {
- if (pf) ax25_std_enquiry_response(ax25);
- break;
- }
- if (ns == ax25->vr) {
- ax25->vr = (ax25->vr + 1) % ax25->modulus;
- queued = ax25_rx_iframe(ax25, skb);
- if (ax25->condition & AX25_COND_OWN_RX_BUSY)
- ax25->vr = ns; /* ax25->vr - 1 */
- ax25->condition &= ~AX25_COND_REJECT;
- if (pf) {
- ax25_std_enquiry_response(ax25);
- } else {
- if (!(ax25->condition & AX25_COND_ACK_PENDING)) {
- ax25->condition |= AX25_COND_ACK_PENDING;
- ax25_start_t2timer(ax25);
- }
- }
- } else {
- if (ax25->condition & AX25_COND_REJECT) {
- if (pf) ax25_std_enquiry_response(ax25);
- } else {
- ax25->condition |= AX25_COND_REJECT;
- ax25_send_control(ax25, AX25_REJ, pf, AX25_RESPONSE);
- ax25->condition &= ~AX25_COND_ACK_PENDING;
- }
- }
- break;
-
- case AX25_FRMR:
- case AX25_ILLEGAL:
- ax25_std_establish_data_link(ax25);
- ax25->state = AX25_STATE_1;
- break;
-
- default:
- break;
- }
-
- return queued;
-}
-
-/*
- * State machine for state 4, Timer Recovery State.
- * The handling of the timer(s) is in file ax25_std_timer.c
- * Handling of state 0 and connection release is in ax25.c.
- */
-static int ax25_std_state4_machine(ax25_cb *ax25, struct sk_buff *skb, int frametype, int ns, int nr, int pf, int type)
-{
- int queued = 0;
-
- switch (frametype) {
- case AX25_SABM:
- case AX25_SABME:
- if (frametype == AX25_SABM) {
- ax25->modulus = AX25_MODULUS;
- ax25->window = ax25->ax25_dev->values[AX25_VALUES_WINDOW];
- } else {
- ax25->modulus = AX25_EMODULUS;
- ax25->window = ax25->ax25_dev->values[AX25_VALUES_EWINDOW];
- }
- ax25_send_control(ax25, AX25_UA, pf, AX25_RESPONSE);
- ax25_stop_t1timer(ax25);
- ax25_stop_t2timer(ax25);
- ax25_start_t3timer(ax25);
- ax25_start_idletimer(ax25);
- ax25->condition = 0x00;
- ax25->vs = 0;
- ax25->va = 0;
- ax25->vr = 0;
- ax25->state = AX25_STATE_3;
- ax25->n2count = 0;
- ax25_requeue_frames(ax25);
- break;
-
- case AX25_DISC:
- ax25_send_control(ax25, AX25_UA, pf, AX25_RESPONSE);
- ax25_disconnect(ax25, 0);
- break;
-
- case AX25_DM:
- ax25_disconnect(ax25, ECONNRESET);
- break;
-
- case AX25_RR:
- case AX25_RNR:
- if (frametype == AX25_RR)
- ax25->condition &= ~AX25_COND_PEER_RX_BUSY;
- else
- ax25->condition |= AX25_COND_PEER_RX_BUSY;
- if (type == AX25_RESPONSE && pf) {
- ax25_stop_t1timer(ax25);
- ax25->n2count = 0;
- if (ax25_validate_nr(ax25, nr)) {
- ax25_frames_acked(ax25, nr);
- if (ax25->vs == ax25->va) {
- ax25_start_t3timer(ax25);
- ax25->state = AX25_STATE_3;
- } else {
- ax25_requeue_frames(ax25);
- }
- } else {
- ax25_std_nr_error_recovery(ax25);
- ax25->state = AX25_STATE_1;
- }
- break;
- }
- if (type == AX25_COMMAND && pf)
- ax25_std_enquiry_response(ax25);
- if (ax25_validate_nr(ax25, nr)) {
- ax25_frames_acked(ax25, nr);
- } else {
- ax25_std_nr_error_recovery(ax25);
- ax25->state = AX25_STATE_1;
- }
- break;
-
- case AX25_REJ:
- ax25->condition &= ~AX25_COND_PEER_RX_BUSY;
- if (pf && type == AX25_RESPONSE) {
- ax25_stop_t1timer(ax25);
- ax25->n2count = 0;
- if (ax25_validate_nr(ax25, nr)) {
- ax25_frames_acked(ax25, nr);
- if (ax25->vs == ax25->va) {
- ax25_start_t3timer(ax25);
- ax25->state = AX25_STATE_3;
- } else {
- ax25_requeue_frames(ax25);
- }
- } else {
- ax25_std_nr_error_recovery(ax25);
- ax25->state = AX25_STATE_1;
- }
- break;
- }
- if (type == AX25_COMMAND && pf)
- ax25_std_enquiry_response(ax25);
- if (ax25_validate_nr(ax25, nr)) {
- ax25_frames_acked(ax25, nr);
- ax25_requeue_frames(ax25);
- } else {
- ax25_std_nr_error_recovery(ax25);
- ax25->state = AX25_STATE_1;
- }
- break;
-
- case AX25_I:
- if (!ax25_validate_nr(ax25, nr)) {
- ax25_std_nr_error_recovery(ax25);
- ax25->state = AX25_STATE_1;
- break;
- }
- ax25_frames_acked(ax25, nr);
- if (ax25->condition & AX25_COND_OWN_RX_BUSY) {
- if (pf)
- ax25_std_enquiry_response(ax25);
- break;
- }
- if (ns == ax25->vr) {
- ax25->vr = (ax25->vr + 1) % ax25->modulus;
- queued = ax25_rx_iframe(ax25, skb);
- if (ax25->condition & AX25_COND_OWN_RX_BUSY)
- ax25->vr = ns; /* ax25->vr - 1 */
- ax25->condition &= ~AX25_COND_REJECT;
- if (pf) {
- ax25_std_enquiry_response(ax25);
- } else {
- if (!(ax25->condition & AX25_COND_ACK_PENDING)) {
- ax25->condition |= AX25_COND_ACK_PENDING;
- ax25_start_t2timer(ax25);
- }
- }
- } else {
- if (ax25->condition & AX25_COND_REJECT) {
- if (pf) ax25_std_enquiry_response(ax25);
- } else {
- ax25->condition |= AX25_COND_REJECT;
- ax25_send_control(ax25, AX25_REJ, pf, AX25_RESPONSE);
- ax25->condition &= ~AX25_COND_ACK_PENDING;
- }
- }
- break;
-
- case AX25_FRMR:
- case AX25_ILLEGAL:
- ax25_std_establish_data_link(ax25);
- ax25->state = AX25_STATE_1;
- break;
-
- default:
- break;
- }
-
- return queued;
-}
-
-/*
- * Higher level upcall for a LAPB frame
- */
-int ax25_std_frame_in(ax25_cb *ax25, struct sk_buff *skb, int type)
-{
- int queued = 0, frametype, ns, nr, pf;
-
- frametype = ax25_decode(ax25, skb, &ns, &nr, &pf);
-
- switch (ax25->state) {
- case AX25_STATE_1:
- queued = ax25_std_state1_machine(ax25, skb, frametype, pf, type);
- break;
- case AX25_STATE_2:
- queued = ax25_std_state2_machine(ax25, skb, frametype, pf, type);
- break;
- case AX25_STATE_3:
- queued = ax25_std_state3_machine(ax25, skb, frametype, ns, nr, pf, type);
- break;
- case AX25_STATE_4:
- queued = ax25_std_state4_machine(ax25, skb, frametype, ns, nr, pf, type);
- break;
- }
-
- ax25_kick(ax25);
-
- return queued;
-}
+++ /dev/null
-// SPDX-License-Identifier: GPL-2.0-or-later
-/*
- *
- * Copyright (C) Jonathan Naylor G4KLX (g4klx@g4klx.demon.co.uk)
- */
-#include <linux/errno.h>
-#include <linux/types.h>
-#include <linux/socket.h>
-#include <linux/in.h>
-#include <linux/kernel.h>
-#include <linux/timer.h>
-#include <linux/string.h>
-#include <linux/sockios.h>
-#include <linux/net.h>
-#include <net/ax25.h>
-#include <linux/inet.h>
-#include <linux/netdevice.h>
-#include <linux/skbuff.h>
-#include <net/sock.h>
-#include <linux/uaccess.h>
-#include <linux/fcntl.h>
-#include <linux/mm.h>
-#include <linux/interrupt.h>
-
-/*
- * The following routines are taken from page 170 of the 7th ARRL Computer
- * Networking Conference paper, as is the whole state machine.
- */
-
-void ax25_std_nr_error_recovery(ax25_cb *ax25)
-{
- ax25_std_establish_data_link(ax25);
-}
-
-void ax25_std_establish_data_link(ax25_cb *ax25)
-{
- ax25->condition = 0x00;
- ax25->n2count = 0;
-
- if (ax25->modulus == AX25_MODULUS)
- ax25_send_control(ax25, AX25_SABM, AX25_POLLON, AX25_COMMAND);
- else
- ax25_send_control(ax25, AX25_SABME, AX25_POLLON, AX25_COMMAND);
-
- ax25_calculate_t1(ax25);
- ax25_stop_idletimer(ax25);
- ax25_stop_t3timer(ax25);
- ax25_stop_t2timer(ax25);
- ax25_start_t1timer(ax25);
-}
-
-void ax25_std_transmit_enquiry(ax25_cb *ax25)
-{
- if (ax25->condition & AX25_COND_OWN_RX_BUSY)
- ax25_send_control(ax25, AX25_RNR, AX25_POLLON, AX25_COMMAND);
- else
- ax25_send_control(ax25, AX25_RR, AX25_POLLON, AX25_COMMAND);
-
- ax25->condition &= ~AX25_COND_ACK_PENDING;
-
- ax25_calculate_t1(ax25);
- ax25_start_t1timer(ax25);
-}
-
-void ax25_std_enquiry_response(ax25_cb *ax25)
-{
- if (ax25->condition & AX25_COND_OWN_RX_BUSY)
- ax25_send_control(ax25, AX25_RNR, AX25_POLLON, AX25_RESPONSE);
- else
- ax25_send_control(ax25, AX25_RR, AX25_POLLON, AX25_RESPONSE);
-
- ax25->condition &= ~AX25_COND_ACK_PENDING;
-}
-
-void ax25_std_timeout_response(ax25_cb *ax25)
-{
- if (ax25->condition & AX25_COND_OWN_RX_BUSY)
- ax25_send_control(ax25, AX25_RNR, AX25_POLLOFF, AX25_RESPONSE);
- else
- ax25_send_control(ax25, AX25_RR, AX25_POLLOFF, AX25_RESPONSE);
-
- ax25->condition &= ~AX25_COND_ACK_PENDING;
-}
+++ /dev/null
-// SPDX-License-Identifier: GPL-2.0-or-later
-/*
- *
- * Copyright (C) Alan Cox GW4PTS (alan@lxorguk.ukuu.org.uk)
- * Copyright (C) Jonathan Naylor G4KLX (g4klx@g4klx.demon.co.uk)
- * Copyright (C) Joerg Reuter DL1BKE (jreuter@yaina.de)
- * Copyright (C) Frederic Rible F1OAT (frible@teaser.fr)
- */
-#include <linux/errno.h>
-#include <linux/types.h>
-#include <linux/socket.h>
-#include <linux/in.h>
-#include <linux/kernel.h>
-#include <linux/timer.h>
-#include <linux/string.h>
-#include <linux/sockios.h>
-#include <linux/net.h>
-#include <net/ax25.h>
-#include <linux/inet.h>
-#include <linux/netdevice.h>
-#include <linux/skbuff.h>
-#include <net/sock.h>
-#include <net/tcp_states.h>
-#include <linux/uaccess.h>
-#include <linux/fcntl.h>
-#include <linux/mm.h>
-#include <linux/interrupt.h>
-
-void ax25_std_heartbeat_expiry(ax25_cb *ax25)
-{
- struct sock *sk = ax25->sk;
-
- if (sk)
- bh_lock_sock(sk);
-
- switch (ax25->state) {
- case AX25_STATE_0:
- case AX25_STATE_2:
- /* Magic here: If we listen() and a new link dies before it
- is accepted() it isn't 'dead' so doesn't get removed. */
- if (!sk || sock_flag(sk, SOCK_DESTROY) ||
- (sk->sk_state == TCP_LISTEN &&
- sock_flag(sk, SOCK_DEAD))) {
- if (sk) {
- sock_hold(sk);
- ax25_destroy_socket(ax25);
- bh_unlock_sock(sk);
- /* Ungrab socket and destroy it */
- sock_put(sk);
- } else
- ax25_destroy_socket(ax25);
- return;
- }
- break;
-
- case AX25_STATE_3:
- case AX25_STATE_4:
- /*
- * Check the state of the receive buffer.
- */
- if (sk != NULL) {
- if (atomic_read(&sk->sk_rmem_alloc) <
- (sk->sk_rcvbuf >> 1) &&
- (ax25->condition & AX25_COND_OWN_RX_BUSY)) {
- ax25->condition &= ~AX25_COND_OWN_RX_BUSY;
- ax25->condition &= ~AX25_COND_ACK_PENDING;
- ax25_send_control(ax25, AX25_RR, AX25_POLLOFF, AX25_RESPONSE);
- break;
- }
- }
- }
-
- if (sk)
- bh_unlock_sock(sk);
-
- ax25_start_heartbeat(ax25);
-}
-
-void ax25_std_t2timer_expiry(ax25_cb *ax25)
-{
- if (ax25->condition & AX25_COND_ACK_PENDING) {
- ax25->condition &= ~AX25_COND_ACK_PENDING;
- ax25_std_timeout_response(ax25);
- }
-}
-
-void ax25_std_t3timer_expiry(ax25_cb *ax25)
-{
- ax25->n2count = 0;
- ax25_std_transmit_enquiry(ax25);
- ax25->state = AX25_STATE_4;
-}
-
-void ax25_std_idletimer_expiry(ax25_cb *ax25)
-{
- ax25_clear_queues(ax25);
-
- ax25->n2count = 0;
- ax25_send_control(ax25, AX25_DISC, AX25_POLLON, AX25_COMMAND);
- ax25->state = AX25_STATE_2;
-
- ax25_calculate_t1(ax25);
- ax25_start_t1timer(ax25);
- ax25_stop_t2timer(ax25);
- ax25_stop_t3timer(ax25);
-
- if (ax25->sk != NULL) {
- bh_lock_sock(ax25->sk);
- ax25->sk->sk_state = TCP_CLOSE;
- ax25->sk->sk_err = 0;
- ax25->sk->sk_shutdown |= SEND_SHUTDOWN;
- if (!sock_flag(ax25->sk, SOCK_DEAD)) {
- ax25->sk->sk_state_change(ax25->sk);
- sock_set_flag(ax25->sk, SOCK_DEAD);
- }
- bh_unlock_sock(ax25->sk);
- }
-}
-
-void ax25_std_t1timer_expiry(ax25_cb *ax25)
-{
- switch (ax25->state) {
- case AX25_STATE_1:
- if (ax25->n2count == ax25->n2) {
- if (ax25->modulus == AX25_MODULUS) {
- ax25_disconnect(ax25, ETIMEDOUT);
- return;
- } else {
- ax25->modulus = AX25_MODULUS;
- ax25->window = ax25->ax25_dev->values[AX25_VALUES_WINDOW];
- ax25->n2count = 0;
- ax25_send_control(ax25, AX25_SABM, AX25_POLLON, AX25_COMMAND);
- }
- } else {
- ax25->n2count++;
- if (ax25->modulus == AX25_MODULUS)
- ax25_send_control(ax25, AX25_SABM, AX25_POLLON, AX25_COMMAND);
- else
- ax25_send_control(ax25, AX25_SABME, AX25_POLLON, AX25_COMMAND);
- }
- break;
-
- case AX25_STATE_2:
- if (ax25->n2count == ax25->n2) {
- ax25_send_control(ax25, AX25_DISC, AX25_POLLON, AX25_COMMAND);
- if (!sock_flag(ax25->sk, SOCK_DESTROY))
- ax25_disconnect(ax25, ETIMEDOUT);
- return;
- } else {
- ax25->n2count++;
- ax25_send_control(ax25, AX25_DISC, AX25_POLLON, AX25_COMMAND);
- }
- break;
-
- case AX25_STATE_3:
- ax25->n2count = 1;
- ax25_std_transmit_enquiry(ax25);
- ax25->state = AX25_STATE_4;
- break;
-
- case AX25_STATE_4:
- if (ax25->n2count == ax25->n2) {
- ax25_send_control(ax25, AX25_DM, AX25_POLLON, AX25_RESPONSE);
- ax25_disconnect(ax25, ETIMEDOUT);
- return;
- } else {
- ax25->n2count++;
- ax25_std_transmit_enquiry(ax25);
- }
- break;
- }
-
- ax25_calculate_t1(ax25);
- ax25_start_t1timer(ax25);
-}
+++ /dev/null
-// SPDX-License-Identifier: GPL-2.0-or-later
-/*
- *
- * Copyright (C) Alan Cox GW4PTS (alan@lxorguk.ukuu.org.uk)
- * Copyright (C) Jonathan Naylor G4KLX (g4klx@g4klx.demon.co.uk)
- * Copyright (C) Joerg Reuter DL1BKE (jreuter@yaina.de)
- * Copyright (C) Frederic Rible F1OAT (frible@teaser.fr)
- */
-#include <linux/errno.h>
-#include <linux/types.h>
-#include <linux/socket.h>
-#include <linux/in.h>
-#include <linux/kernel.h>
-#include <linux/timer.h>
-#include <linux/string.h>
-#include <linux/sockios.h>
-#include <linux/net.h>
-#include <linux/slab.h>
-#include <net/ax25.h>
-#include <linux/inet.h>
-#include <linux/netdevice.h>
-#include <linux/skbuff.h>
-#include <net/sock.h>
-#include <net/tcp_states.h>
-#include <linux/uaccess.h>
-#include <linux/fcntl.h>
-#include <linux/mm.h>
-#include <linux/interrupt.h>
-
-/*
- * This routine purges all the queues of frames.
- */
-void ax25_clear_queues(ax25_cb *ax25)
-{
- skb_queue_purge(&ax25->write_queue);
- skb_queue_purge(&ax25->ack_queue);
- skb_queue_purge(&ax25->reseq_queue);
- skb_queue_purge(&ax25->frag_queue);
-}
-
-/*
- * This routine purges the input queue of those frames that have been
- * acknowledged. This replaces the boxes labelled "V(a) <- N(r)" on the
- * SDL diagram.
- */
-void ax25_frames_acked(ax25_cb *ax25, unsigned short nr)
-{
- struct sk_buff *skb;
-
- /*
- * Remove all the ack-ed frames from the ack queue.
- */
- if (ax25->va != nr) {
- while (skb_peek(&ax25->ack_queue) != NULL && ax25->va != nr) {
- skb = skb_dequeue(&ax25->ack_queue);
- kfree_skb(skb);
- ax25->va = (ax25->va + 1) % ax25->modulus;
- }
- }
-}
-
-void ax25_requeue_frames(ax25_cb *ax25)
-{
- struct sk_buff *skb;
-
- /*
- * Requeue all the un-ack-ed frames on the output queue to be picked
- * up by ax25_kick called from the timer. This arrangement handles the
- * possibility of an empty output queue.
- */
- while ((skb = skb_dequeue_tail(&ax25->ack_queue)) != NULL)
- skb_queue_head(&ax25->write_queue, skb);
-}
-
-/*
- * Validate that the value of nr is between va and vs. Return true or
- * false for testing.
- */
-int ax25_validate_nr(ax25_cb *ax25, unsigned short nr)
-{
- unsigned short vc = ax25->va;
-
- while (vc != ax25->vs) {
- if (nr == vc) return 1;
- vc = (vc + 1) % ax25->modulus;
- }
-
- if (nr == ax25->vs) return 1;
-
- return 0;
-}
-
-/*
- * This routine is the centralised routine for parsing the control
- * information for the different frame formats.
- */
-int ax25_decode(ax25_cb *ax25, struct sk_buff *skb, int *ns, int *nr, int *pf)
-{
- unsigned char *frame;
- int frametype = AX25_ILLEGAL;
-
- frame = skb->data;
- *ns = *nr = *pf = 0;
-
- if (ax25->modulus == AX25_MODULUS) {
- if ((frame[0] & AX25_S) == 0) {
- frametype = AX25_I; /* I frame - carries NR/NS/PF */
- *ns = (frame[0] >> 1) & 0x07;
- *nr = (frame[0] >> 5) & 0x07;
- *pf = frame[0] & AX25_PF;
- } else if ((frame[0] & AX25_U) == 1) { /* S frame - take out PF/NR */
- frametype = frame[0] & 0x0F;
- *nr = (frame[0] >> 5) & 0x07;
- *pf = frame[0] & AX25_PF;
- } else if ((frame[0] & AX25_U) == 3) { /* U frame - take out PF */
- frametype = frame[0] & ~AX25_PF;
- *pf = frame[0] & AX25_PF;
- }
- skb_pull(skb, 1);
- } else {
- if ((frame[0] & AX25_S) == 0) {
- frametype = AX25_I; /* I frame - carries NR/NS/PF */
- *ns = (frame[0] >> 1) & 0x7F;
- *nr = (frame[1] >> 1) & 0x7F;
- *pf = frame[1] & AX25_EPF;
- skb_pull(skb, 2);
- } else if ((frame[0] & AX25_U) == 1) { /* S frame - take out PF/NR */
- frametype = frame[0] & 0x0F;
- *nr = (frame[1] >> 1) & 0x7F;
- *pf = frame[1] & AX25_EPF;
- skb_pull(skb, 2);
- } else if ((frame[0] & AX25_U) == 3) { /* U frame - take out PF */
- frametype = frame[0] & ~AX25_PF;
- *pf = frame[0] & AX25_PF;
- skb_pull(skb, 1);
- }
- }
-
- return frametype;
-}
-
-/*
- * This routine is called when the HDLC layer internally generates a
- * command or response for the remote machine ( eg. RR, UA etc. ).
- * Only supervisory or unnumbered frames are processed.
- */
-void ax25_send_control(ax25_cb *ax25, int frametype, int poll_bit, int type)
-{
- struct sk_buff *skb;
- unsigned char *dptr;
-
- if ((skb = alloc_skb(ax25->ax25_dev->dev->hard_header_len + 2, GFP_ATOMIC)) == NULL)
- return;
-
- skb_reserve(skb, ax25->ax25_dev->dev->hard_header_len);
-
- skb_reset_network_header(skb);
-
- /* Assume a response - address structure for DTE */
- if (ax25->modulus == AX25_MODULUS) {
- dptr = skb_put(skb, 1);
- *dptr = frametype;
- *dptr |= (poll_bit) ? AX25_PF : 0;
- if ((frametype & AX25_U) == AX25_S) /* S frames carry NR */
- *dptr |= (ax25->vr << 5);
- } else {
- if ((frametype & AX25_U) == AX25_U) {
- dptr = skb_put(skb, 1);
- *dptr = frametype;
- *dptr |= (poll_bit) ? AX25_PF : 0;
- } else {
- dptr = skb_put(skb, 2);
- dptr[0] = frametype;
- dptr[1] = (ax25->vr << 1);
- dptr[1] |= (poll_bit) ? AX25_EPF : 0;
- }
- }
-
- ax25_transmit_buffer(ax25, skb, type);
-}
-
-/*
- * Send a 'DM' to an unknown connection attempt, or an invalid caller.
- *
- * Note: src here is the sender, thus it's the target of the DM
- */
-void ax25_return_dm(struct net_device *dev, ax25_address *src, ax25_address *dest, ax25_digi *digi)
-{
- struct sk_buff *skb;
- char *dptr;
- ax25_digi retdigi;
-
- if (dev == NULL)
- return;
-
- if ((skb = alloc_skb(dev->hard_header_len + 1, GFP_ATOMIC)) == NULL)
- return; /* Next SABM will get DM'd */
-
- skb_reserve(skb, dev->hard_header_len);
- skb_reset_network_header(skb);
-
- ax25_digi_invert(digi, &retdigi);
-
- dptr = skb_put(skb, 1);
-
- *dptr = AX25_DM | AX25_PF;
-
- /*
- * Do the address ourselves
- */
- dptr = skb_push(skb, ax25_addr_size(digi));
- dptr += ax25_addr_build(dptr, dest, src, &retdigi, AX25_RESPONSE, AX25_MODULUS);
-
- ax25_queue_xmit(skb, dev);
-}
-
-/*
- * Exponential backoff for AX.25
- */
-void ax25_calculate_t1(ax25_cb *ax25)
-{
- int n, t = 2;
-
- switch (ax25->backoff) {
- case 0:
- break;
-
- case 1:
- t += 2 * ax25->n2count;
- break;
-
- case 2:
- for (n = 0; n < ax25->n2count; n++)
- t *= 2;
- if (t > 8) t = 8;
- break;
- }
-
- ax25->t1 = t * ax25->rtt;
-}
-
-/*
- * Calculate the Round Trip Time
- */
-void ax25_calculate_rtt(ax25_cb *ax25)
-{
- if (ax25->backoff == 0)
- return;
-
- if (ax25_t1timer_running(ax25) && ax25->n2count == 0)
- ax25->rtt = (9 * ax25->rtt + ax25->t1 - ax25_display_timer(&ax25->t1timer)) / 10;
-
- if (ax25->rtt < AX25_T1CLAMPLO)
- ax25->rtt = AX25_T1CLAMPLO;
-
- if (ax25->rtt > AX25_T1CLAMPHI)
- ax25->rtt = AX25_T1CLAMPHI;
-}
-
-void ax25_disconnect(ax25_cb *ax25, int reason)
-{
- ax25_clear_queues(ax25);
-
- if (reason == ENETUNREACH) {
- timer_delete_sync(&ax25->timer);
- timer_delete_sync(&ax25->t1timer);
- timer_delete_sync(&ax25->t2timer);
- timer_delete_sync(&ax25->t3timer);
- timer_delete_sync(&ax25->idletimer);
- } else {
- if (ax25->sk && !sock_flag(ax25->sk, SOCK_DESTROY))
- ax25_stop_heartbeat(ax25);
- ax25_stop_t1timer(ax25);
- ax25_stop_t2timer(ax25);
- ax25_stop_t3timer(ax25);
- ax25_stop_idletimer(ax25);
- }
-
- ax25->state = AX25_STATE_0;
-
- ax25_link_failed(ax25, reason);
-
- if (ax25->sk != NULL) {
- local_bh_disable();
- bh_lock_sock(ax25->sk);
- ax25->sk->sk_state = TCP_CLOSE;
- ax25->sk->sk_err = reason;
- ax25->sk->sk_shutdown |= SEND_SHUTDOWN;
- if (!sock_flag(ax25->sk, SOCK_DEAD)) {
- ax25->sk->sk_state_change(ax25->sk);
- sock_set_flag(ax25->sk, SOCK_DEAD);
- }
- bh_unlock_sock(ax25->sk);
- local_bh_enable();
- }
-}
+++ /dev/null
-// SPDX-License-Identifier: GPL-2.0-or-later
-/*
- *
- * Copyright (C) Alan Cox GW4PTS (alan@lxorguk.ukuu.org.uk)
- * Copyright (C) Jonathan Naylor G4KLX (g4klx@g4klx.demon.co.uk)
- * Copyright (C) Tomi Manninen OH2BNS (oh2bns@sral.fi)
- * Copyright (C) Darryl Miles G7LED (dlm@g7led.demon.co.uk)
- * Copyright (C) Joerg Reuter DL1BKE (jreuter@yaina.de)
- * Copyright (C) Frederic Rible F1OAT (frible@teaser.fr)
- * Copyright (C) 2002 Ralf Baechle DO1GRB (ralf@gnu.org)
- */
-#include <linux/errno.h>
-#include <linux/types.h>
-#include <linux/socket.h>
-#include <linux/in.h>
-#include <linux/kernel.h>
-#include <linux/module.h>
-#include <linux/jiffies.h>
-#include <linux/timer.h>
-#include <linux/string.h>
-#include <linux/sockios.h>
-#include <linux/net.h>
-#include <net/ax25.h>
-#include <linux/inet.h>
-#include <linux/netdevice.h>
-#include <linux/skbuff.h>
-#include <net/sock.h>
-#include <linux/uaccess.h>
-#include <linux/fcntl.h>
-#include <linux/mm.h>
-#include <linux/interrupt.h>
-
-static void ax25_heartbeat_expiry(struct timer_list *);
-static void ax25_t1timer_expiry(struct timer_list *);
-static void ax25_t2timer_expiry(struct timer_list *);
-static void ax25_t3timer_expiry(struct timer_list *);
-static void ax25_idletimer_expiry(struct timer_list *);
-
-void ax25_setup_timers(ax25_cb *ax25)
-{
- timer_setup(&ax25->timer, ax25_heartbeat_expiry, 0);
- timer_setup(&ax25->t1timer, ax25_t1timer_expiry, 0);
- timer_setup(&ax25->t2timer, ax25_t2timer_expiry, 0);
- timer_setup(&ax25->t3timer, ax25_t3timer_expiry, 0);
- timer_setup(&ax25->idletimer, ax25_idletimer_expiry, 0);
-}
-
-void ax25_start_heartbeat(ax25_cb *ax25)
-{
- mod_timer(&ax25->timer, jiffies + 5 * HZ);
-}
-
-void ax25_start_t1timer(ax25_cb *ax25)
-{
- mod_timer(&ax25->t1timer, jiffies + ax25->t1);
-}
-
-void ax25_start_t2timer(ax25_cb *ax25)
-{
- mod_timer(&ax25->t2timer, jiffies + ax25->t2);
-}
-
-void ax25_start_t3timer(ax25_cb *ax25)
-{
- if (ax25->t3 > 0)
- mod_timer(&ax25->t3timer, jiffies + ax25->t3);
- else
- timer_delete(&ax25->t3timer);
-}
-
-void ax25_start_idletimer(ax25_cb *ax25)
-{
- if (ax25->idle > 0)
- mod_timer(&ax25->idletimer, jiffies + ax25->idle);
- else
- timer_delete(&ax25->idletimer);
-}
-
-void ax25_stop_heartbeat(ax25_cb *ax25)
-{
- timer_delete(&ax25->timer);
-}
-
-void ax25_stop_t1timer(ax25_cb *ax25)
-{
- timer_delete(&ax25->t1timer);
-}
-
-void ax25_stop_t2timer(ax25_cb *ax25)
-{
- timer_delete(&ax25->t2timer);
-}
-
-void ax25_stop_t3timer(ax25_cb *ax25)
-{
- timer_delete(&ax25->t3timer);
-}
-
-void ax25_stop_idletimer(ax25_cb *ax25)
-{
- timer_delete(&ax25->idletimer);
-}
-
-int ax25_t1timer_running(ax25_cb *ax25)
-{
- return timer_pending(&ax25->t1timer);
-}
-
-unsigned long ax25_display_timer(struct timer_list *timer)
-{
- long delta = timer->expires - jiffies;
-
- if (!timer_pending(timer))
- return 0;
-
- return max(0L, delta);
-}
-
-EXPORT_SYMBOL(ax25_display_timer);
-
-static void ax25_heartbeat_expiry(struct timer_list *t)
-{
- int proto = AX25_PROTO_STD_SIMPLEX;
- ax25_cb *ax25 = timer_container_of(ax25, t, timer);
-
- if (ax25->ax25_dev)
- proto = ax25->ax25_dev->values[AX25_VALUES_PROTOCOL];
-
- switch (proto) {
- case AX25_PROTO_STD_SIMPLEX:
- case AX25_PROTO_STD_DUPLEX:
- ax25_std_heartbeat_expiry(ax25);
- break;
-
-#ifdef CONFIG_AX25_DAMA_SLAVE
- case AX25_PROTO_DAMA_SLAVE:
- if (ax25->ax25_dev->dama.slave)
- ax25_ds_heartbeat_expiry(ax25);
- else
- ax25_std_heartbeat_expiry(ax25);
- break;
-#endif
- }
-}
-
-static void ax25_t1timer_expiry(struct timer_list *t)
-{
- ax25_cb *ax25 = timer_container_of(ax25, t, t1timer);
-
- switch (ax25->ax25_dev->values[AX25_VALUES_PROTOCOL]) {
- case AX25_PROTO_STD_SIMPLEX:
- case AX25_PROTO_STD_DUPLEX:
- ax25_std_t1timer_expiry(ax25);
- break;
-
-#ifdef CONFIG_AX25_DAMA_SLAVE
- case AX25_PROTO_DAMA_SLAVE:
- if (!ax25->ax25_dev->dama.slave)
- ax25_std_t1timer_expiry(ax25);
- break;
-#endif
- }
-}
-
-static void ax25_t2timer_expiry(struct timer_list *t)
-{
- ax25_cb *ax25 = timer_container_of(ax25, t, t2timer);
-
- switch (ax25->ax25_dev->values[AX25_VALUES_PROTOCOL]) {
- case AX25_PROTO_STD_SIMPLEX:
- case AX25_PROTO_STD_DUPLEX:
- ax25_std_t2timer_expiry(ax25);
- break;
-
-#ifdef CONFIG_AX25_DAMA_SLAVE
- case AX25_PROTO_DAMA_SLAVE:
- if (!ax25->ax25_dev->dama.slave)
- ax25_std_t2timer_expiry(ax25);
- break;
-#endif
- }
-}
-
-static void ax25_t3timer_expiry(struct timer_list *t)
-{
- ax25_cb *ax25 = timer_container_of(ax25, t, t3timer);
-
- switch (ax25->ax25_dev->values[AX25_VALUES_PROTOCOL]) {
- case AX25_PROTO_STD_SIMPLEX:
- case AX25_PROTO_STD_DUPLEX:
- ax25_std_t3timer_expiry(ax25);
- break;
-
-#ifdef CONFIG_AX25_DAMA_SLAVE
- case AX25_PROTO_DAMA_SLAVE:
- if (ax25->ax25_dev->dama.slave)
- ax25_ds_t3timer_expiry(ax25);
- else
- ax25_std_t3timer_expiry(ax25);
- break;
-#endif
- }
-}
-
-static void ax25_idletimer_expiry(struct timer_list *t)
-{
- ax25_cb *ax25 = timer_container_of(ax25, t, idletimer);
-
- switch (ax25->ax25_dev->values[AX25_VALUES_PROTOCOL]) {
- case AX25_PROTO_STD_SIMPLEX:
- case AX25_PROTO_STD_DUPLEX:
- ax25_std_idletimer_expiry(ax25);
- break;
-
-#ifdef CONFIG_AX25_DAMA_SLAVE
- case AX25_PROTO_DAMA_SLAVE:
- if (ax25->ax25_dev->dama.slave)
- ax25_ds_idletimer_expiry(ax25);
- else
- ax25_std_idletimer_expiry(ax25);
- break;
-#endif
- }
-}
+++ /dev/null
-// SPDX-License-Identifier: GPL-2.0-or-later
-/*
- *
- * Copyright (C) Jonathan Naylor G4KLX (g4klx@g4klx.demon.co.uk)
- */
-
-#include <linux/capability.h>
-#include <linux/errno.h>
-#include <linux/types.h>
-#include <linux/socket.h>
-#include <linux/in.h>
-#include <linux/kernel.h>
-#include <linux/timer.h>
-#include <linux/string.h>
-#include <linux/sockios.h>
-#include <linux/net.h>
-#include <linux/spinlock.h>
-#include <linux/slab.h>
-#include <net/ax25.h>
-#include <linux/inet.h>
-#include <linux/netdevice.h>
-#include <linux/if_arp.h>
-#include <linux/skbuff.h>
-#include <net/sock.h>
-#include <linux/uaccess.h>
-#include <linux/fcntl.h>
-#include <linux/mm.h>
-#include <linux/interrupt.h>
-#include <linux/list.h>
-#include <linux/notifier.h>
-#include <linux/proc_fs.h>
-#include <linux/seq_file.h>
-#include <linux/stat.h>
-#include <linux/sysctl.h>
-#include <linux/export.h>
-#include <net/ip.h>
-#include <net/arp.h>
-
-/*
- * Callsign/UID mapper. This is in kernel space for security on multi-amateur machines.
- */
-
-static HLIST_HEAD(ax25_uid_list);
-static DEFINE_RWLOCK(ax25_uid_lock);
-
-int ax25_uid_policy;
-
-EXPORT_SYMBOL(ax25_uid_policy);
-
-ax25_uid_assoc *ax25_findbyuid(kuid_t uid)
-{
- ax25_uid_assoc *ax25_uid, *res = NULL;
-
- read_lock(&ax25_uid_lock);
- ax25_uid_for_each(ax25_uid, &ax25_uid_list) {
- if (uid_eq(ax25_uid->uid, uid)) {
- ax25_uid_hold(ax25_uid);
- res = ax25_uid;
- break;
- }
- }
- read_unlock(&ax25_uid_lock);
-
- return res;
-}
-
-EXPORT_SYMBOL(ax25_findbyuid);
-
-int ax25_uid_ioctl(int cmd, struct sockaddr_ax25 *sax)
-{
- ax25_uid_assoc *ax25_uid;
- ax25_uid_assoc *user;
- unsigned long res;
-
- switch (cmd) {
- case SIOCAX25GETUID:
- res = -ENOENT;
- read_lock(&ax25_uid_lock);
- ax25_uid_for_each(ax25_uid, &ax25_uid_list) {
- if (ax25cmp(&sax->sax25_call, &ax25_uid->call) == 0) {
- res = from_kuid_munged(current_user_ns(), ax25_uid->uid);
- break;
- }
- }
- read_unlock(&ax25_uid_lock);
-
- return res;
-
- case SIOCAX25ADDUID:
- {
- kuid_t sax25_kuid;
- if (!capable(CAP_NET_ADMIN))
- return -EPERM;
- sax25_kuid = make_kuid(current_user_ns(), sax->sax25_uid);
- if (!uid_valid(sax25_kuid))
- return -EINVAL;
- user = ax25_findbyuid(sax25_kuid);
- if (user) {
- ax25_uid_put(user);
- return -EEXIST;
- }
- if (sax->sax25_uid == 0)
- return -EINVAL;
- if ((ax25_uid = kmalloc_obj(*ax25_uid)) == NULL)
- return -ENOMEM;
-
- refcount_set(&ax25_uid->refcount, 1);
- ax25_uid->uid = sax25_kuid;
- ax25_uid->call = sax->sax25_call;
-
- write_lock(&ax25_uid_lock);
- hlist_add_head(&ax25_uid->uid_node, &ax25_uid_list);
- write_unlock(&ax25_uid_lock);
-
- return 0;
- }
- case SIOCAX25DELUID:
- if (!capable(CAP_NET_ADMIN))
- return -EPERM;
-
- ax25_uid = NULL;
- write_lock(&ax25_uid_lock);
- ax25_uid_for_each(ax25_uid, &ax25_uid_list) {
- if (ax25cmp(&sax->sax25_call, &ax25_uid->call) == 0)
- break;
- }
- if (ax25_uid == NULL) {
- write_unlock(&ax25_uid_lock);
- return -ENOENT;
- }
- hlist_del_init(&ax25_uid->uid_node);
- ax25_uid_put(ax25_uid);
- write_unlock(&ax25_uid_lock);
-
- return 0;
-
- default:
- return -EINVAL;
- }
-
- return -EINVAL; /*NOTREACHED */
-}
-
-#ifdef CONFIG_PROC_FS
-
-static void *ax25_uid_seq_start(struct seq_file *seq, loff_t *pos)
- __acquires(ax25_uid_lock)
-{
- read_lock(&ax25_uid_lock);
- return seq_hlist_start_head(&ax25_uid_list, *pos);
-}
-
-static void *ax25_uid_seq_next(struct seq_file *seq, void *v, loff_t *pos)
-{
- return seq_hlist_next(v, &ax25_uid_list, pos);
-}
-
-static void ax25_uid_seq_stop(struct seq_file *seq, void *v)
- __releases(ax25_uid_lock)
-{
- read_unlock(&ax25_uid_lock);
-}
-
-static int ax25_uid_seq_show(struct seq_file *seq, void *v)
-{
- char buf[11];
-
- if (v == SEQ_START_TOKEN)
- seq_printf(seq, "Policy: %d\n", ax25_uid_policy);
- else {
- struct ax25_uid_assoc *pt;
-
- pt = hlist_entry(v, struct ax25_uid_assoc, uid_node);
- seq_printf(seq, "%6d %s\n",
- from_kuid_munged(seq_user_ns(seq), pt->uid),
- ax2asc(buf, &pt->call));
- }
- return 0;
-}
-
-const struct seq_operations ax25_uid_seqops = {
- .start = ax25_uid_seq_start,
- .next = ax25_uid_seq_next,
- .stop = ax25_uid_seq_stop,
- .show = ax25_uid_seq_show,
-};
-#endif
-
-/*
- * Free all memory associated with UID/Callsign structures.
- */
-void __exit ax25_uid_free(void)
-{
- ax25_uid_assoc *ax25_uid;
-
- write_lock(&ax25_uid_lock);
-again:
- ax25_uid_for_each(ax25_uid, &ax25_uid_list) {
- hlist_del_init(&ax25_uid->uid_node);
- ax25_uid_put(ax25_uid);
- goto again;
- }
- write_unlock(&ax25_uid_lock);
-}
+++ /dev/null
-// SPDX-License-Identifier: GPL-2.0-or-later
-/*
- *
- * Copyright (C) 1996 Mike Shaver (shaver@zeroknowledge.com)
- */
-#include <linux/mm.h>
-#include <linux/slab.h>
-#include <linux/sysctl.h>
-#include <linux/spinlock.h>
-#include <net/ax25.h>
-
-static int min_ipdefmode[1], max_ipdefmode[] = {1};
-static int min_axdefmode[1], max_axdefmode[] = {1};
-static int min_backoff[1], max_backoff[] = {2};
-static int min_conmode[1], max_conmode[] = {2};
-static int min_window[] = {1}, max_window[] = {7};
-static int min_ewindow[] = {1}, max_ewindow[] = {63};
-static int min_t1[] = {1}, max_t1[] = {30000};
-static int min_t2[] = {1}, max_t2[] = {20000};
-static int min_t3[1], max_t3[] = {3600000};
-static int min_idle[1], max_idle[] = {65535000};
-static int min_n2[] = {1}, max_n2[] = {31};
-static int min_paclen[] = {1}, max_paclen[] = {512};
-static int min_proto[1], max_proto[] = { AX25_PROTO_MAX };
-#ifdef CONFIG_AX25_DAMA_SLAVE
-static int min_ds_timeout[1], max_ds_timeout[] = {65535000};
-#endif
-
-static const struct ctl_table ax25_param_table[] = {
- {
- .procname = "ip_default_mode",
- .maxlen = sizeof(int),
- .mode = 0644,
- .proc_handler = proc_dointvec_minmax,
- .extra1 = &min_ipdefmode,
- .extra2 = &max_ipdefmode
- },
- {
- .procname = "ax25_default_mode",
- .maxlen = sizeof(int),
- .mode = 0644,
- .proc_handler = proc_dointvec_minmax,
- .extra1 = &min_axdefmode,
- .extra2 = &max_axdefmode
- },
- {
- .procname = "backoff_type",
- .maxlen = sizeof(int),
- .mode = 0644,
- .proc_handler = proc_dointvec_minmax,
- .extra1 = &min_backoff,
- .extra2 = &max_backoff
- },
- {
- .procname = "connect_mode",
- .maxlen = sizeof(int),
- .mode = 0644,
- .proc_handler = proc_dointvec_minmax,
- .extra1 = &min_conmode,
- .extra2 = &max_conmode
- },
- {
- .procname = "standard_window_size",
- .maxlen = sizeof(int),
- .mode = 0644,
- .proc_handler = proc_dointvec_minmax,
- .extra1 = &min_window,
- .extra2 = &max_window
- },
- {
- .procname = "extended_window_size",
- .maxlen = sizeof(int),
- .mode = 0644,
- .proc_handler = proc_dointvec_minmax,
- .extra1 = &min_ewindow,
- .extra2 = &max_ewindow
- },
- {
- .procname = "t1_timeout",
- .maxlen = sizeof(int),
- .mode = 0644,
- .proc_handler = proc_dointvec_minmax,
- .extra1 = &min_t1,
- .extra2 = &max_t1
- },
- {
- .procname = "t2_timeout",
- .maxlen = sizeof(int),
- .mode = 0644,
- .proc_handler = proc_dointvec_minmax,
- .extra1 = &min_t2,
- .extra2 = &max_t2
- },
- {
- .procname = "t3_timeout",
- .maxlen = sizeof(int),
- .mode = 0644,
- .proc_handler = proc_dointvec_minmax,
- .extra1 = &min_t3,
- .extra2 = &max_t3
- },
- {
- .procname = "idle_timeout",
- .maxlen = sizeof(int),
- .mode = 0644,
- .proc_handler = proc_dointvec_minmax,
- .extra1 = &min_idle,
- .extra2 = &max_idle
- },
- {
- .procname = "maximum_retry_count",
- .maxlen = sizeof(int),
- .mode = 0644,
- .proc_handler = proc_dointvec_minmax,
- .extra1 = &min_n2,
- .extra2 = &max_n2
- },
- {
- .procname = "maximum_packet_length",
- .maxlen = sizeof(int),
- .mode = 0644,
- .proc_handler = proc_dointvec_minmax,
- .extra1 = &min_paclen,
- .extra2 = &max_paclen
- },
- {
- .procname = "protocol",
- .maxlen = sizeof(int),
- .mode = 0644,
- .proc_handler = proc_dointvec_minmax,
- .extra1 = &min_proto,
- .extra2 = &max_proto
- },
-#ifdef CONFIG_AX25_DAMA_SLAVE
- {
- .procname = "dama_slave_timeout",
- .maxlen = sizeof(int),
- .mode = 0644,
- .proc_handler = proc_dointvec_minmax,
- .extra1 = &min_ds_timeout,
- .extra2 = &max_ds_timeout
- },
-#endif
-};
-
-int ax25_register_dev_sysctl(ax25_dev *ax25_dev)
-{
- char path[sizeof("net/ax25/") + IFNAMSIZ];
- int k;
- struct ctl_table *table;
-
- table = kmemdup(ax25_param_table, sizeof(ax25_param_table), GFP_KERNEL);
- if (!table)
- return -ENOMEM;
-
- BUILD_BUG_ON(ARRAY_SIZE(ax25_param_table) != AX25_MAX_VALUES);
- for (k = 0; k < AX25_MAX_VALUES; k++)
- table[k].data = &ax25_dev->values[k];
-
- snprintf(path, sizeof(path), "net/ax25/%s", ax25_dev->dev->name);
- ax25_dev->sysheader = register_net_sysctl_sz(&init_net, path, table,
- ARRAY_SIZE(ax25_param_table));
- if (!ax25_dev->sysheader) {
- kfree(table);
- return -ENOMEM;
- }
- return 0;
-}
-
-void ax25_unregister_dev_sysctl(ax25_dev *ax25_dev)
-{
- struct ctl_table_header *header = ax25_dev->sysheader;
- const struct ctl_table *table;
-
- if (header) {
- ax25_dev->sysheader = NULL;
- table = header->ctl_table_arg;
- unregister_net_sysctl_table(header);
- kfree(table);
- }
-}
#include <net/sock.h>
#include <net/arp.h>
#include <net/ax25.h>
-#include <net/netrom.h>
#include <net/dst_metadata.h>
#include <net/ip_tunnels.h>
+++ /dev/null
-# SPDX-License-Identifier: GPL-2.0-only
-#
-# Makefile for the Linux NET/ROM layer.
-#
-
-obj-$(CONFIG_NETROM) += netrom.o
-
-netrom-y := af_netrom.o nr_dev.o nr_in.o nr_loopback.o \
- nr_out.o nr_route.o nr_subr.o nr_timer.o
-netrom-$(CONFIG_SYSCTL) += sysctl_net_netrom.o
+++ /dev/null
-// SPDX-License-Identifier: GPL-2.0-or-later
-/*
- *
- * Copyright Jonathan Naylor G4KLX (g4klx@g4klx.demon.co.uk)
- * Copyright Alan Cox GW4PTS (alan@lxorguk.ukuu.org.uk)
- * Copyright Darryl Miles G7LED (dlm@g7led.demon.co.uk)
- */
-#include <linux/module.h>
-#include <linux/moduleparam.h>
-#include <linux/capability.h>
-#include <linux/errno.h>
-#include <linux/types.h>
-#include <linux/socket.h>
-#include <linux/in.h>
-#include <linux/slab.h>
-#include <linux/kernel.h>
-#include <linux/sched/signal.h>
-#include <linux/timer.h>
-#include <linux/string.h>
-#include <linux/sockios.h>
-#include <linux/net.h>
-#include <linux/stat.h>
-#include <net/ax25.h>
-#include <linux/inet.h>
-#include <linux/netdevice.h>
-#include <linux/if_arp.h>
-#include <linux/skbuff.h>
-#include <net/net_namespace.h>
-#include <net/sock.h>
-#include <linux/uaccess.h>
-#include <linux/fcntl.h>
-#include <linux/termios.h> /* For TIOCINQ/OUTQ */
-#include <linux/mm.h>
-#include <linux/interrupt.h>
-#include <linux/notifier.h>
-#include <net/netrom.h>
-#include <linux/proc_fs.h>
-#include <linux/seq_file.h>
-#include <net/ip.h>
-#include <net/tcp_states.h>
-#include <net/arp.h>
-#include <linux/init.h>
-
-static int nr_ndevs = 4;
-
-int sysctl_netrom_default_path_quality = NR_DEFAULT_QUAL;
-int sysctl_netrom_obsolescence_count_initialiser = NR_DEFAULT_OBS;
-int sysctl_netrom_network_ttl_initialiser = NR_DEFAULT_TTL;
-int sysctl_netrom_transport_timeout = NR_DEFAULT_T1;
-int sysctl_netrom_transport_maximum_tries = NR_DEFAULT_N2;
-int sysctl_netrom_transport_acknowledge_delay = NR_DEFAULT_T2;
-int sysctl_netrom_transport_busy_delay = NR_DEFAULT_T4;
-int sysctl_netrom_transport_requested_window_size = NR_DEFAULT_WINDOW;
-int sysctl_netrom_transport_no_activity_timeout = NR_DEFAULT_IDLE;
-int sysctl_netrom_routing_control = NR_DEFAULT_ROUTING;
-int sysctl_netrom_link_fails_count = NR_DEFAULT_FAILS;
-int sysctl_netrom_reset_circuit = NR_DEFAULT_RESET;
-
-static unsigned short circuit = 0x101;
-
-static HLIST_HEAD(nr_list);
-static DEFINE_SPINLOCK(nr_list_lock);
-
-static const struct proto_ops nr_proto_ops;
-
-/*
- * NETROM network devices are virtual network devices encapsulating NETROM
- * frames into AX.25 which will be sent through an AX.25 device, so form a
- * special "super class" of normal net devices; split their locks off into a
- * separate class since they always nest.
- */
-static struct lock_class_key nr_netdev_xmit_lock_key;
-static struct lock_class_key nr_netdev_addr_lock_key;
-
-static void nr_set_lockdep_one(struct net_device *dev,
- struct netdev_queue *txq,
- void *_unused)
-{
- lockdep_set_class(&txq->_xmit_lock, &nr_netdev_xmit_lock_key);
-}
-
-static void nr_set_lockdep_key(struct net_device *dev)
-{
- lockdep_set_class(&dev->addr_list_lock, &nr_netdev_addr_lock_key);
- netdev_for_each_tx_queue(dev, nr_set_lockdep_one, NULL);
-}
-
-/*
- * Socket removal during an interrupt is now safe.
- */
-static void nr_remove_socket(struct sock *sk)
-{
- spin_lock_bh(&nr_list_lock);
- sk_del_node_init(sk);
- spin_unlock_bh(&nr_list_lock);
-}
-
-/*
- * Kill all bound sockets on a dropped device.
- */
-static void nr_kill_by_device(struct net_device *dev)
-{
- struct sock *s;
-
- spin_lock_bh(&nr_list_lock);
- sk_for_each(s, &nr_list)
- if (nr_sk(s)->device == dev)
- nr_disconnect(s, ENETUNREACH);
- spin_unlock_bh(&nr_list_lock);
-}
-
-/*
- * Handle device status changes.
- */
-static int nr_device_event(struct notifier_block *this, unsigned long event, void *ptr)
-{
- struct net_device *dev = netdev_notifier_info_to_dev(ptr);
-
- if (!net_eq(dev_net(dev), &init_net))
- return NOTIFY_DONE;
-
- if (event != NETDEV_DOWN)
- return NOTIFY_DONE;
-
- nr_kill_by_device(dev);
- nr_rt_device_down(dev);
-
- return NOTIFY_DONE;
-}
-
-/*
- * Add a socket to the bound sockets list.
- */
-static void nr_insert_socket(struct sock *sk)
-{
- spin_lock_bh(&nr_list_lock);
- sk_add_node(sk, &nr_list);
- spin_unlock_bh(&nr_list_lock);
-}
-
-/*
- * Find a socket that wants to accept the Connect Request we just
- * received.
- */
-static struct sock *nr_find_listener(ax25_address *addr)
-{
- struct sock *s;
-
- spin_lock_bh(&nr_list_lock);
- sk_for_each(s, &nr_list)
- if (!ax25cmp(&nr_sk(s)->source_addr, addr) &&
- s->sk_state == TCP_LISTEN) {
- sock_hold(s);
- goto found;
- }
- s = NULL;
-found:
- spin_unlock_bh(&nr_list_lock);
- return s;
-}
-
-/*
- * Find a connected NET/ROM socket given my circuit IDs.
- */
-static struct sock *nr_find_socket(unsigned char index, unsigned char id)
-{
- struct sock *s;
-
- spin_lock_bh(&nr_list_lock);
- sk_for_each(s, &nr_list) {
- struct nr_sock *nr = nr_sk(s);
-
- if (nr->my_index == index && nr->my_id == id) {
- sock_hold(s);
- goto found;
- }
- }
- s = NULL;
-found:
- spin_unlock_bh(&nr_list_lock);
- return s;
-}
-
-/*
- * Find a connected NET/ROM socket given their circuit IDs.
- */
-static struct sock *nr_find_peer(unsigned char index, unsigned char id,
- ax25_address *dest)
-{
- struct sock *s;
-
- spin_lock_bh(&nr_list_lock);
- sk_for_each(s, &nr_list) {
- struct nr_sock *nr = nr_sk(s);
-
- if (nr->your_index == index && nr->your_id == id &&
- !ax25cmp(&nr->dest_addr, dest)) {
- sock_hold(s);
- goto found;
- }
- }
- s = NULL;
-found:
- spin_unlock_bh(&nr_list_lock);
- return s;
-}
-
-/*
- * Find next free circuit ID.
- */
-static unsigned short nr_find_next_circuit(void)
-{
- unsigned short id = circuit;
- unsigned char i, j;
- struct sock *sk;
-
- for (;;) {
- i = id / 256;
- j = id % 256;
-
- if (i != 0 && j != 0) {
- if ((sk=nr_find_socket(i, j)) == NULL)
- break;
- sock_put(sk);
- }
-
- id++;
- }
-
- return id;
-}
-
-/*
- * Deferred destroy.
- */
-void nr_destroy_socket(struct sock *);
-
-/*
- * Handler for deferred kills.
- */
-static void nr_destroy_timer(struct timer_list *t)
-{
- struct sock *sk = timer_container_of(sk, t, sk_timer);
- bh_lock_sock(sk);
- sock_hold(sk);
- nr_destroy_socket(sk);
- bh_unlock_sock(sk);
- sock_put(sk);
-}
-
-/*
- * This is called from user mode and the timers. Thus it protects itself
- * against interrupt users but doesn't worry about being called during
- * work. Once it is removed from the queue no interrupt or bottom half
- * will touch it and we are (fairly 8-) ) safe.
- */
-void nr_destroy_socket(struct sock *sk)
-{
- struct sk_buff *skb;
-
- nr_remove_socket(sk);
-
- nr_stop_heartbeat(sk);
- nr_stop_t1timer(sk);
- nr_stop_t2timer(sk);
- nr_stop_t4timer(sk);
- nr_stop_idletimer(sk);
-
- nr_clear_queues(sk); /* Flush the queues */
-
- while ((skb = skb_dequeue(&sk->sk_receive_queue)) != NULL) {
- if (skb->sk != sk) { /* A pending connection */
- /* Queue the unaccepted socket for death */
- sock_set_flag(skb->sk, SOCK_DEAD);
- nr_start_heartbeat(skb->sk);
- nr_sk(skb->sk)->state = NR_STATE_0;
- }
-
- kfree_skb(skb);
- }
-
- if (sk_has_allocations(sk)) {
- /* Defer: outstanding buffers */
- sk->sk_timer.function = nr_destroy_timer;
- sk->sk_timer.expires = jiffies + 2 * HZ;
- add_timer(&sk->sk_timer);
- } else
- sock_put(sk);
-}
-
-/*
- * Handling for system calls applied via the various interfaces to a
- * NET/ROM socket object.
- */
-
-static int nr_setsockopt(struct socket *sock, int level, int optname,
- sockptr_t optval, unsigned int optlen)
-{
- struct sock *sk = sock->sk;
- struct nr_sock *nr = nr_sk(sk);
- unsigned int opt;
-
- if (level != SOL_NETROM)
- return -ENOPROTOOPT;
-
- if (optlen < sizeof(unsigned int))
- return -EINVAL;
-
- if (copy_from_sockptr(&opt, optval, sizeof(opt)))
- return -EFAULT;
-
- switch (optname) {
- case NETROM_T1:
- if (opt < 1 || opt > UINT_MAX / HZ)
- return -EINVAL;
- nr->t1 = opt * HZ;
- return 0;
-
- case NETROM_T2:
- if (opt < 1 || opt > UINT_MAX / HZ)
- return -EINVAL;
- nr->t2 = opt * HZ;
- return 0;
-
- case NETROM_N2:
- if (opt < 1 || opt > 31)
- return -EINVAL;
- nr->n2 = opt;
- return 0;
-
- case NETROM_T4:
- if (opt < 1 || opt > UINT_MAX / HZ)
- return -EINVAL;
- nr->t4 = opt * HZ;
- return 0;
-
- case NETROM_IDLE:
- if (opt > UINT_MAX / (60 * HZ))
- return -EINVAL;
- nr->idle = opt * 60 * HZ;
- return 0;
-
- default:
- return -ENOPROTOOPT;
- }
-}
-
-static int nr_getsockopt(struct socket *sock, int level, int optname,
- char __user *optval, int __user *optlen)
-{
- struct sock *sk = sock->sk;
- struct nr_sock *nr = nr_sk(sk);
- int val = 0;
- int len;
-
- if (level != SOL_NETROM)
- return -ENOPROTOOPT;
-
- if (get_user(len, optlen))
- return -EFAULT;
-
- if (len < 0)
- return -EINVAL;
-
- switch (optname) {
- case NETROM_T1:
- val = nr->t1 / HZ;
- break;
-
- case NETROM_T2:
- val = nr->t2 / HZ;
- break;
-
- case NETROM_N2:
- val = nr->n2;
- break;
-
- case NETROM_T4:
- val = nr->t4 / HZ;
- break;
-
- case NETROM_IDLE:
- val = nr->idle / (60 * HZ);
- break;
-
- default:
- return -ENOPROTOOPT;
- }
-
- len = min_t(unsigned int, len, sizeof(int));
-
- if (put_user(len, optlen))
- return -EFAULT;
-
- return copy_to_user(optval, &val, len) ? -EFAULT : 0;
-}
-
-static int nr_listen(struct socket *sock, int backlog)
-{
- struct sock *sk = sock->sk;
-
- lock_sock(sk);
- if (sock->state != SS_UNCONNECTED) {
- release_sock(sk);
- return -EINVAL;
- }
-
- if (sk->sk_state != TCP_LISTEN) {
- memset(&nr_sk(sk)->user_addr, 0, AX25_ADDR_LEN);
- sk->sk_max_ack_backlog = backlog;
- sk->sk_state = TCP_LISTEN;
- release_sock(sk);
- return 0;
- }
- release_sock(sk);
-
- return -EOPNOTSUPP;
-}
-
-static struct proto nr_proto = {
- .name = "NETROM",
- .owner = THIS_MODULE,
- .obj_size = sizeof(struct nr_sock),
-};
-
-static int nr_create(struct net *net, struct socket *sock, int protocol,
- int kern)
-{
- struct sock *sk;
- struct nr_sock *nr;
-
- if (!net_eq(net, &init_net))
- return -EAFNOSUPPORT;
-
- if (sock->type != SOCK_SEQPACKET || protocol != 0)
- return -ESOCKTNOSUPPORT;
-
- sk = sk_alloc(net, PF_NETROM, GFP_ATOMIC, &nr_proto, kern);
- if (sk == NULL)
- return -ENOMEM;
-
- nr = nr_sk(sk);
-
- sock_init_data(sock, sk);
-
- sock->ops = &nr_proto_ops;
- sk->sk_protocol = protocol;
-
- skb_queue_head_init(&nr->ack_queue);
- skb_queue_head_init(&nr->reseq_queue);
- skb_queue_head_init(&nr->frag_queue);
-
- nr_init_timers(sk);
-
- nr->t1 =
- msecs_to_jiffies(READ_ONCE(sysctl_netrom_transport_timeout));
- nr->t2 =
- msecs_to_jiffies(READ_ONCE(sysctl_netrom_transport_acknowledge_delay));
- nr->n2 =
- msecs_to_jiffies(READ_ONCE(sysctl_netrom_transport_maximum_tries));
- nr->t4 =
- msecs_to_jiffies(READ_ONCE(sysctl_netrom_transport_busy_delay));
- nr->idle =
- msecs_to_jiffies(READ_ONCE(sysctl_netrom_transport_no_activity_timeout));
- nr->window = READ_ONCE(sysctl_netrom_transport_requested_window_size);
-
- nr->bpqext = 1;
- nr->state = NR_STATE_0;
-
- return 0;
-}
-
-static struct sock *nr_make_new(struct sock *osk)
-{
- struct sock *sk;
- struct nr_sock *nr, *onr;
-
- if (osk->sk_type != SOCK_SEQPACKET)
- return NULL;
-
- sk = sk_alloc(sock_net(osk), PF_NETROM, GFP_ATOMIC, osk->sk_prot, 0);
- if (sk == NULL)
- return NULL;
-
- nr = nr_sk(sk);
-
- sock_init_data(NULL, sk);
-
- sk->sk_type = osk->sk_type;
- sk->sk_priority = READ_ONCE(osk->sk_priority);
- sk->sk_protocol = osk->sk_protocol;
- sk->sk_rcvbuf = osk->sk_rcvbuf;
- sk->sk_sndbuf = osk->sk_sndbuf;
- sk->sk_state = TCP_ESTABLISHED;
- sock_copy_flags(sk, osk);
-
- skb_queue_head_init(&nr->ack_queue);
- skb_queue_head_init(&nr->reseq_queue);
- skb_queue_head_init(&nr->frag_queue);
-
- nr_init_timers(sk);
-
- onr = nr_sk(osk);
-
- nr->t1 = onr->t1;
- nr->t2 = onr->t2;
- nr->n2 = onr->n2;
- nr->t4 = onr->t4;
- nr->idle = onr->idle;
- nr->window = onr->window;
-
- nr->device = onr->device;
- nr->bpqext = onr->bpqext;
-
- return sk;
-}
-
-static int nr_release(struct socket *sock)
-{
- struct sock *sk = sock->sk;
- struct nr_sock *nr;
-
- if (sk == NULL) return 0;
-
- sock_hold(sk);
- sock_orphan(sk);
- lock_sock(sk);
- nr = nr_sk(sk);
-
- switch (nr->state) {
- case NR_STATE_0:
- case NR_STATE_1:
- case NR_STATE_2:
- nr_disconnect(sk, 0);
- nr_destroy_socket(sk);
- break;
-
- case NR_STATE_3:
- nr_clear_queues(sk);
- nr->n2count = 0;
- nr_write_internal(sk, NR_DISCREQ);
- nr_start_t1timer(sk);
- nr_stop_t2timer(sk);
- nr_stop_t4timer(sk);
- nr_stop_idletimer(sk);
- nr->state = NR_STATE_2;
- sk->sk_state = TCP_CLOSE;
- sk->sk_shutdown |= SEND_SHUTDOWN;
- sk->sk_state_change(sk);
- sock_set_flag(sk, SOCK_DESTROY);
- break;
-
- default:
- break;
- }
-
- sock->sk = NULL;
- release_sock(sk);
- sock_put(sk);
-
- return 0;
-}
-
-static int nr_bind(struct socket *sock, struct sockaddr_unsized *uaddr, int addr_len)
-{
- struct sock *sk = sock->sk;
- struct nr_sock *nr = nr_sk(sk);
- struct full_sockaddr_ax25 *addr = (struct full_sockaddr_ax25 *)uaddr;
- struct net_device *dev;
- ax25_uid_assoc *user;
- ax25_address *source;
-
- lock_sock(sk);
- if (!sock_flag(sk, SOCK_ZAPPED)) {
- release_sock(sk);
- return -EINVAL;
- }
- if (addr_len < sizeof(struct sockaddr_ax25) || addr_len > sizeof(struct full_sockaddr_ax25)) {
- release_sock(sk);
- return -EINVAL;
- }
- if (addr_len < (addr->fsa_ax25.sax25_ndigis * sizeof(ax25_address) + sizeof(struct sockaddr_ax25))) {
- release_sock(sk);
- return -EINVAL;
- }
- if (addr->fsa_ax25.sax25_family != AF_NETROM) {
- release_sock(sk);
- return -EINVAL;
- }
- if ((dev = nr_dev_get(&addr->fsa_ax25.sax25_call)) == NULL) {
- release_sock(sk);
- return -EADDRNOTAVAIL;
- }
-
- /*
- * Only the super user can set an arbitrary user callsign.
- */
- if (addr->fsa_ax25.sax25_ndigis == 1) {
- if (!capable(CAP_NET_BIND_SERVICE)) {
- dev_put(dev);
- release_sock(sk);
- return -EPERM;
- }
- nr->user_addr = addr->fsa_digipeater[0];
- nr->source_addr = addr->fsa_ax25.sax25_call;
- } else {
- source = &addr->fsa_ax25.sax25_call;
-
- user = ax25_findbyuid(current_euid());
- if (user) {
- nr->user_addr = user->call;
- ax25_uid_put(user);
- } else {
- if (ax25_uid_policy && !capable(CAP_NET_BIND_SERVICE)) {
- release_sock(sk);
- dev_put(dev);
- return -EPERM;
- }
- nr->user_addr = *source;
- }
-
- nr->source_addr = *source;
- }
-
- nr->device = dev;
- nr_insert_socket(sk);
-
- sock_reset_flag(sk, SOCK_ZAPPED);
- dev_put(dev);
- release_sock(sk);
-
- return 0;
-}
-
-static int nr_connect(struct socket *sock, struct sockaddr_unsized *uaddr,
- int addr_len, int flags)
-{
- struct sock *sk = sock->sk;
- struct nr_sock *nr = nr_sk(sk);
- struct sockaddr_ax25 *addr = (struct sockaddr_ax25 *)uaddr;
- const ax25_address *source = NULL;
- ax25_uid_assoc *user;
- struct net_device *dev;
- int err = 0;
-
- lock_sock(sk);
- if (sk->sk_state == TCP_ESTABLISHED && sock->state == SS_CONNECTING) {
- sock->state = SS_CONNECTED;
- goto out_release; /* Connect completed during a ERESTARTSYS event */
- }
-
- if (sk->sk_state == TCP_CLOSE && sock->state == SS_CONNECTING) {
- sock->state = SS_UNCONNECTED;
- err = -ECONNREFUSED;
- goto out_release;
- }
-
- if (sk->sk_state == TCP_ESTABLISHED) {
- err = -EISCONN; /* No reconnect on a seqpacket socket */
- goto out_release;
- }
-
- if (sock->state == SS_CONNECTING) {
- err = -EALREADY;
- goto out_release;
- }
-
- sk->sk_state = TCP_CLOSE;
- sock->state = SS_UNCONNECTED;
-
- if (addr_len != sizeof(struct sockaddr_ax25) && addr_len != sizeof(struct full_sockaddr_ax25)) {
- err = -EINVAL;
- goto out_release;
- }
- if (addr->sax25_family != AF_NETROM) {
- err = -EINVAL;
- goto out_release;
- }
- if (sock_flag(sk, SOCK_ZAPPED)) { /* Must bind first - autobinding in this may or may not work */
- sock_reset_flag(sk, SOCK_ZAPPED);
-
- if ((dev = nr_dev_first()) == NULL) {
- err = -ENETUNREACH;
- goto out_release;
- }
- source = (const ax25_address *)dev->dev_addr;
-
- user = ax25_findbyuid(current_euid());
- if (user) {
- nr->user_addr = user->call;
- ax25_uid_put(user);
- } else {
- if (ax25_uid_policy && !capable(CAP_NET_ADMIN)) {
- dev_put(dev);
- err = -EPERM;
- goto out_release;
- }
- nr->user_addr = *source;
- }
-
- nr->source_addr = *source;
- nr->device = dev;
-
- dev_put(dev);
- nr_insert_socket(sk); /* Finish the bind */
- }
-
- nr->dest_addr = addr->sax25_call;
-
- release_sock(sk);
- circuit = nr_find_next_circuit();
- lock_sock(sk);
-
- nr->my_index = circuit / 256;
- nr->my_id = circuit % 256;
-
- circuit++;
-
- /* Move to connecting socket, start sending Connect Requests */
- sock->state = SS_CONNECTING;
- sk->sk_state = TCP_SYN_SENT;
-
- nr_establish_data_link(sk);
-
- nr->state = NR_STATE_1;
-
- nr_start_heartbeat(sk);
-
- /* Now the loop */
- if (sk->sk_state != TCP_ESTABLISHED && (flags & O_NONBLOCK)) {
- err = -EINPROGRESS;
- goto out_release;
- }
-
- /*
- * A Connect Ack with Choke or timeout or failed routing will go to
- * closed.
- */
- if (sk->sk_state == TCP_SYN_SENT) {
- DEFINE_WAIT(wait);
-
- for (;;) {
- prepare_to_wait(sk_sleep(sk), &wait,
- TASK_INTERRUPTIBLE);
- if (sk->sk_state != TCP_SYN_SENT)
- break;
- if (!signal_pending(current)) {
- release_sock(sk);
- schedule();
- lock_sock(sk);
- continue;
- }
- err = -ERESTARTSYS;
- break;
- }
- finish_wait(sk_sleep(sk), &wait);
- if (err)
- goto out_release;
- }
-
- if (sk->sk_state != TCP_ESTABLISHED) {
- sock->state = SS_UNCONNECTED;
- err = sock_error(sk); /* Always set at this point */
- goto out_release;
- }
-
- sock->state = SS_CONNECTED;
-
-out_release:
- release_sock(sk);
-
- return err;
-}
-
-static int nr_accept(struct socket *sock, struct socket *newsock,
- struct proto_accept_arg *arg)
-{
- struct sk_buff *skb;
- struct sock *newsk;
- DEFINE_WAIT(wait);
- struct sock *sk;
- int err = 0;
-
- if ((sk = sock->sk) == NULL)
- return -EINVAL;
-
- lock_sock(sk);
- if (sk->sk_type != SOCK_SEQPACKET) {
- err = -EOPNOTSUPP;
- goto out_release;
- }
-
- if (sk->sk_state != TCP_LISTEN) {
- err = -EINVAL;
- goto out_release;
- }
-
- /*
- * The write queue this time is holding sockets ready to use
- * hooked into the SABM we saved
- */
- for (;;) {
- prepare_to_wait(sk_sleep(sk), &wait, TASK_INTERRUPTIBLE);
- skb = skb_dequeue(&sk->sk_receive_queue);
- if (skb)
- break;
-
- if (arg->flags & O_NONBLOCK) {
- err = -EWOULDBLOCK;
- break;
- }
- if (!signal_pending(current)) {
- release_sock(sk);
- schedule();
- lock_sock(sk);
- continue;
- }
- err = -ERESTARTSYS;
- break;
- }
- finish_wait(sk_sleep(sk), &wait);
- if (err)
- goto out_release;
-
- newsk = skb->sk;
- sock_graft(newsk, newsock);
-
- /* Now attach up the new socket */
- kfree_skb(skb);
- sk_acceptq_removed(sk);
-
-out_release:
- release_sock(sk);
-
- return err;
-}
-
-static int nr_getname(struct socket *sock, struct sockaddr *uaddr,
- int peer)
-{
- struct full_sockaddr_ax25 *sax = (struct full_sockaddr_ax25 *)uaddr;
- struct sock *sk = sock->sk;
- struct nr_sock *nr = nr_sk(sk);
- int uaddr_len;
-
- memset(&sax->fsa_ax25, 0, sizeof(struct sockaddr_ax25));
-
- lock_sock(sk);
- if (peer != 0) {
- if (sk->sk_state != TCP_ESTABLISHED) {
- release_sock(sk);
- return -ENOTCONN;
- }
- sax->fsa_ax25.sax25_family = AF_NETROM;
- sax->fsa_ax25.sax25_ndigis = 1;
- sax->fsa_ax25.sax25_call = nr->user_addr;
- memset(sax->fsa_digipeater, 0, sizeof(sax->fsa_digipeater));
- sax->fsa_digipeater[0] = nr->dest_addr;
- uaddr_len = sizeof(struct full_sockaddr_ax25);
- } else {
- sax->fsa_ax25.sax25_family = AF_NETROM;
- sax->fsa_ax25.sax25_ndigis = 0;
- sax->fsa_ax25.sax25_call = nr->source_addr;
- uaddr_len = sizeof(struct sockaddr_ax25);
- }
- release_sock(sk);
-
- return uaddr_len;
-}
-
-int nr_rx_frame(struct sk_buff *skb, struct net_device *dev)
-{
- struct sock *sk;
- struct sock *make;
- struct nr_sock *nr_make;
- ax25_address *src, *dest, *user;
- unsigned short circuit_index, circuit_id;
- unsigned short peer_circuit_index, peer_circuit_id;
- unsigned short frametype, flags, window, timeout;
- int ret;
-
- skb_orphan(skb);
-
- /*
- * skb->data points to the netrom frame start
- */
-
- src = (ax25_address *)(skb->data + 0);
- dest = (ax25_address *)(skb->data + 7);
-
- circuit_index = skb->data[15];
- circuit_id = skb->data[16];
- peer_circuit_index = skb->data[17];
- peer_circuit_id = skb->data[18];
- frametype = skb->data[19] & 0x0F;
- flags = skb->data[19] & 0xF0;
-
- /*
- * Check for an incoming IP over NET/ROM frame.
- */
- if (frametype == NR_PROTOEXT &&
- circuit_index == NR_PROTO_IP && circuit_id == NR_PROTO_IP) {
- skb_pull(skb, NR_NETWORK_LEN + NR_TRANSPORT_LEN);
- skb_reset_transport_header(skb);
-
- return nr_rx_ip(skb, dev);
- }
-
- /*
- * Find an existing socket connection, based on circuit ID, if it's
- * a Connect Request base it on their circuit ID.
- *
- * Circuit ID 0/0 is not valid but it could still be a "reset" for a
- * circuit that no longer exists at the other end ...
- */
-
- sk = NULL;
-
- if (circuit_index == 0 && circuit_id == 0) {
- if (frametype == NR_CONNACK && flags == NR_CHOKE_FLAG)
- sk = nr_find_peer(peer_circuit_index, peer_circuit_id, src);
- } else {
- if (frametype == NR_CONNREQ)
- sk = nr_find_peer(circuit_index, circuit_id, src);
- else
- sk = nr_find_socket(circuit_index, circuit_id);
- }
-
- if (sk != NULL) {
- bh_lock_sock(sk);
- skb_reset_transport_header(skb);
-
- if (frametype == NR_CONNACK && skb->len == 22)
- nr_sk(sk)->bpqext = 1;
- else
- nr_sk(sk)->bpqext = 0;
-
- ret = nr_process_rx_frame(sk, skb);
- bh_unlock_sock(sk);
- sock_put(sk);
- return ret;
- }
-
- /*
- * Now it should be a CONNREQ.
- */
- if (frametype != NR_CONNREQ) {
- /*
- * Here it would be nice to be able to send a reset but
- * NET/ROM doesn't have one. We've tried to extend the protocol
- * by sending NR_CONNACK | NR_CHOKE_FLAGS replies but that
- * apparently kills BPQ boxes... :-(
- * So now we try to follow the established behaviour of
- * G8PZT's Xrouter which is sending packets with command type 7
- * as an extension of the protocol.
- */
- if (READ_ONCE(sysctl_netrom_reset_circuit) &&
- (frametype != NR_RESET || flags != 0))
- nr_transmit_reset(skb, 1);
-
- return 0;
- }
-
- sk = nr_find_listener(dest);
-
- user = (ax25_address *)(skb->data + 21);
-
- if (sk == NULL || sk_acceptq_is_full(sk) ||
- (make = nr_make_new(sk)) == NULL) {
- nr_transmit_refusal(skb, 0);
- if (sk)
- sock_put(sk);
- return 0;
- }
-
- bh_lock_sock(sk);
-
- window = skb->data[20];
-
- sock_hold(make);
- skb->sk = make;
- skb->destructor = sock_efree;
- make->sk_state = TCP_ESTABLISHED;
-
- /* Fill in his circuit details */
- nr_make = nr_sk(make);
- nr_make->source_addr = *dest;
- nr_make->dest_addr = *src;
- nr_make->user_addr = *user;
-
- nr_make->your_index = circuit_index;
- nr_make->your_id = circuit_id;
-
- bh_unlock_sock(sk);
- circuit = nr_find_next_circuit();
- bh_lock_sock(sk);
-
- nr_make->my_index = circuit / 256;
- nr_make->my_id = circuit % 256;
-
- circuit++;
-
- /* Window negotiation */
- if (window < nr_make->window)
- nr_make->window = window;
-
- /* L4 timeout negotiation */
- if (skb->len == 37) {
- timeout = skb->data[36] * 256 + skb->data[35];
- if (timeout * HZ < nr_make->t1)
- nr_make->t1 = timeout * HZ;
- nr_make->bpqext = 1;
- } else {
- nr_make->bpqext = 0;
- }
-
- nr_write_internal(make, NR_CONNACK);
-
- nr_make->condition = 0x00;
- nr_make->vs = 0;
- nr_make->va = 0;
- nr_make->vr = 0;
- nr_make->vl = 0;
- nr_make->state = NR_STATE_3;
- sk_acceptq_added(sk);
- skb_queue_head(&sk->sk_receive_queue, skb);
-
- if (!sock_flag(sk, SOCK_DEAD))
- sk->sk_data_ready(sk);
-
- bh_unlock_sock(sk);
- sock_put(sk);
-
- nr_insert_socket(make);
-
- nr_start_heartbeat(make);
- nr_start_idletimer(make);
-
- return 1;
-}
-
-static int nr_sendmsg(struct socket *sock, struct msghdr *msg, size_t len)
-{
- struct sock *sk = sock->sk;
- struct nr_sock *nr = nr_sk(sk);
- DECLARE_SOCKADDR(struct sockaddr_ax25 *, usax, msg->msg_name);
- int err;
- struct sockaddr_ax25 sax;
- struct sk_buff *skb;
- unsigned char *asmptr;
- int size;
-
- if (msg->msg_flags & ~(MSG_DONTWAIT|MSG_EOR|MSG_CMSG_COMPAT))
- return -EINVAL;
-
- lock_sock(sk);
- if (sock_flag(sk, SOCK_ZAPPED)) {
- err = -EADDRNOTAVAIL;
- goto out;
- }
-
- if (sk->sk_shutdown & SEND_SHUTDOWN) {
- send_sig(SIGPIPE, current, 0);
- err = -EPIPE;
- goto out;
- }
-
- if (nr->device == NULL) {
- err = -ENETUNREACH;
- goto out;
- }
-
- if (usax) {
- if (msg->msg_namelen < sizeof(sax)) {
- err = -EINVAL;
- goto out;
- }
- sax = *usax;
- if (ax25cmp(&nr->dest_addr, &sax.sax25_call) != 0) {
- err = -EISCONN;
- goto out;
- }
- if (sax.sax25_family != AF_NETROM) {
- err = -EINVAL;
- goto out;
- }
- } else {
- if (sk->sk_state != TCP_ESTABLISHED) {
- err = -ENOTCONN;
- goto out;
- }
- sax.sax25_family = AF_NETROM;
- sax.sax25_call = nr->dest_addr;
- }
-
- /* Build a packet - the conventional user limit is 236 bytes. We can
- do ludicrously large NetROM frames but must not overflow */
- if (len > 65536) {
- err = -EMSGSIZE;
- goto out;
- }
-
- size = len + NR_NETWORK_LEN + NR_TRANSPORT_LEN;
-
- if ((skb = sock_alloc_send_skb(sk, size, msg->msg_flags & MSG_DONTWAIT, &err)) == NULL)
- goto out;
-
- skb_reserve(skb, size - len);
- skb_reset_transport_header(skb);
-
- /*
- * Push down the NET/ROM header
- */
-
- asmptr = skb_push(skb, NR_TRANSPORT_LEN);
-
- /* Build a NET/ROM Transport header */
-
- *asmptr++ = nr->your_index;
- *asmptr++ = nr->your_id;
- *asmptr++ = 0; /* To be filled in later */
- *asmptr++ = 0; /* Ditto */
- *asmptr++ = NR_INFO;
-
- /*
- * Put the data on the end
- */
- skb_put(skb, len);
-
- /* User data follows immediately after the NET/ROM transport header */
- if (memcpy_from_msg(skb_transport_header(skb), msg, len)) {
- kfree_skb(skb);
- err = -EFAULT;
- goto out;
- }
-
- if (sk->sk_state != TCP_ESTABLISHED) {
- kfree_skb(skb);
- err = -ENOTCONN;
- goto out;
- }
-
- nr_output(sk, skb); /* Shove it onto the queue */
-
- err = len;
-out:
- release_sock(sk);
- return err;
-}
-
-static int nr_recvmsg(struct socket *sock, struct msghdr *msg, size_t size,
- int flags)
-{
- struct sock *sk = sock->sk;
- DECLARE_SOCKADDR(struct sockaddr_ax25 *, sax, msg->msg_name);
- size_t copied;
- struct sk_buff *skb;
- int er;
-
- /*
- * This works for seqpacket too. The receiver has ordered the queue for
- * us! We do one quick check first though
- */
-
- lock_sock(sk);
- if (sk->sk_state != TCP_ESTABLISHED) {
- release_sock(sk);
- return -ENOTCONN;
- }
-
- /* Now we can treat all alike */
- skb = skb_recv_datagram(sk, flags, &er);
- if (!skb) {
- release_sock(sk);
- return er;
- }
-
- skb_reset_transport_header(skb);
- copied = skb->len;
-
- if (copied > size) {
- copied = size;
- msg->msg_flags |= MSG_TRUNC;
- }
-
- er = skb_copy_datagram_msg(skb, 0, msg, copied);
- if (er < 0) {
- skb_free_datagram(sk, skb);
- release_sock(sk);
- return er;
- }
-
- if (sax != NULL) {
- memset(sax, 0, sizeof(*sax));
- sax->sax25_family = AF_NETROM;
- skb_copy_from_linear_data_offset(skb, 7, sax->sax25_call.ax25_call,
- AX25_ADDR_LEN);
- msg->msg_namelen = sizeof(*sax);
- }
-
- skb_free_datagram(sk, skb);
-
- release_sock(sk);
- return copied;
-}
-
-
-static int nr_ioctl(struct socket *sock, unsigned int cmd, unsigned long arg)
-{
- struct sock *sk = sock->sk;
- void __user *argp = (void __user *)arg;
-
- switch (cmd) {
- case TIOCOUTQ: {
- long amount;
-
- lock_sock(sk);
- amount = sk->sk_sndbuf - sk_wmem_alloc_get(sk);
- if (amount < 0)
- amount = 0;
- release_sock(sk);
- return put_user(amount, (int __user *)argp);
- }
-
- case TIOCINQ: {
- struct sk_buff *skb;
- long amount = 0L;
-
- lock_sock(sk);
- /* These two are safe on a single CPU system as only user tasks fiddle here */
- if ((skb = skb_peek(&sk->sk_receive_queue)) != NULL)
- amount = skb->len;
- release_sock(sk);
- return put_user(amount, (int __user *)argp);
- }
-
- case SIOCGIFADDR:
- case SIOCSIFADDR:
- case SIOCGIFDSTADDR:
- case SIOCSIFDSTADDR:
- case SIOCGIFBRDADDR:
- case SIOCSIFBRDADDR:
- case SIOCGIFNETMASK:
- case SIOCSIFNETMASK:
- case SIOCGIFMETRIC:
- case SIOCSIFMETRIC:
- return -EINVAL;
-
- case SIOCADDRT:
- case SIOCDELRT:
- case SIOCNRDECOBS:
- if (!capable(CAP_NET_ADMIN))
- return -EPERM;
- return nr_rt_ioctl(cmd, argp);
-
- default:
- return -ENOIOCTLCMD;
- }
-
- return 0;
-}
-
-#ifdef CONFIG_PROC_FS
-
-static void *nr_info_start(struct seq_file *seq, loff_t *pos)
- __acquires(&nr_list_lock)
-{
- spin_lock_bh(&nr_list_lock);
- return seq_hlist_start_head(&nr_list, *pos);
-}
-
-static void *nr_info_next(struct seq_file *seq, void *v, loff_t *pos)
-{
- return seq_hlist_next(v, &nr_list, pos);
-}
-
-static void nr_info_stop(struct seq_file *seq, void *v)
- __releases(&nr_list_lock)
-{
- spin_unlock_bh(&nr_list_lock);
-}
-
-static int nr_info_show(struct seq_file *seq, void *v)
-{
- struct sock *s = sk_entry(v);
- struct net_device *dev;
- struct nr_sock *nr;
- const char *devname;
- char buf[11];
-
- if (v == SEQ_START_TOKEN)
- seq_puts(seq,
-"user_addr dest_node src_node dev my your st vs vr va t1 t2 t4 idle n2 wnd Snd-Q Rcv-Q inode\n");
-
- else {
-
- bh_lock_sock(s);
- nr = nr_sk(s);
-
- if ((dev = nr->device) == NULL)
- devname = "???";
- else
- devname = dev->name;
-
- seq_printf(seq, "%-9s ", ax2asc(buf, &nr->user_addr));
- seq_printf(seq, "%-9s ", ax2asc(buf, &nr->dest_addr));
- seq_printf(seq,
-"%-9s %-3s %02X/%02X %02X/%02X %2d %3d %3d %3d %3lu/%03lu %2lu/%02lu %3lu/%03lu %3lu/%03lu %2d/%02d %3d %5d %5d %llu\n",
- ax2asc(buf, &nr->source_addr),
- devname,
- nr->my_index,
- nr->my_id,
- nr->your_index,
- nr->your_id,
- nr->state,
- nr->vs,
- nr->vr,
- nr->va,
- ax25_display_timer(&nr->t1timer) / HZ,
- nr->t1 / HZ,
- ax25_display_timer(&nr->t2timer) / HZ,
- nr->t2 / HZ,
- ax25_display_timer(&nr->t4timer) / HZ,
- nr->t4 / HZ,
- ax25_display_timer(&nr->idletimer) / (60 * HZ),
- nr->idle / (60 * HZ),
- nr->n2count,
- nr->n2,
- nr->window,
- sk_wmem_alloc_get(s),
- sk_rmem_alloc_get(s),
- s->sk_socket ? SOCK_INODE(s->sk_socket)->i_ino : (u64)0);
-
- bh_unlock_sock(s);
- }
- return 0;
-}
-
-static const struct seq_operations nr_info_seqops = {
- .start = nr_info_start,
- .next = nr_info_next,
- .stop = nr_info_stop,
- .show = nr_info_show,
-};
-#endif /* CONFIG_PROC_FS */
-
-static const struct net_proto_family nr_family_ops = {
- .family = PF_NETROM,
- .create = nr_create,
- .owner = THIS_MODULE,
-};
-
-static const struct proto_ops nr_proto_ops = {
- .family = PF_NETROM,
- .owner = THIS_MODULE,
- .release = nr_release,
- .bind = nr_bind,
- .connect = nr_connect,
- .socketpair = sock_no_socketpair,
- .accept = nr_accept,
- .getname = nr_getname,
- .poll = datagram_poll,
- .ioctl = nr_ioctl,
- .gettstamp = sock_gettstamp,
- .listen = nr_listen,
- .shutdown = sock_no_shutdown,
- .setsockopt = nr_setsockopt,
- .getsockopt = nr_getsockopt,
- .sendmsg = nr_sendmsg,
- .recvmsg = nr_recvmsg,
- .mmap = sock_no_mmap,
-};
-
-static struct notifier_block nr_dev_notifier = {
- .notifier_call = nr_device_event,
-};
-
-static struct net_device **dev_nr;
-
-static struct ax25_protocol nr_pid = {
- .pid = AX25_P_NETROM,
- .func = nr_route_frame
-};
-
-static struct ax25_linkfail nr_linkfail_notifier = {
- .func = nr_link_failed,
-};
-
-static int __init nr_proto_init(void)
-{
- int i;
- int rc = proto_register(&nr_proto, 0);
-
- if (rc)
- return rc;
-
- if (nr_ndevs > 0x7fffffff/sizeof(struct net_device *)) {
- pr_err("NET/ROM: %s - nr_ndevs parameter too large\n",
- __func__);
- rc = -EINVAL;
- goto unregister_proto;
- }
-
- dev_nr = kzalloc_objs(struct net_device *, nr_ndevs);
- if (!dev_nr) {
- pr_err("NET/ROM: %s - unable to allocate device array\n",
- __func__);
- rc = -ENOMEM;
- goto unregister_proto;
- }
-
- for (i = 0; i < nr_ndevs; i++) {
- char name[IFNAMSIZ];
- struct net_device *dev;
-
- sprintf(name, "nr%d", i);
- dev = alloc_netdev(0, name, NET_NAME_UNKNOWN, nr_setup);
- if (!dev) {
- rc = -ENOMEM;
- goto fail;
- }
-
- dev->base_addr = i;
- rc = register_netdev(dev);
- if (rc) {
- free_netdev(dev);
- goto fail;
- }
- nr_set_lockdep_key(dev);
- dev_nr[i] = dev;
- }
-
- rc = sock_register(&nr_family_ops);
- if (rc)
- goto fail;
-
- rc = register_netdevice_notifier(&nr_dev_notifier);
- if (rc)
- goto out_sock;
-
- ax25_register_pid(&nr_pid);
- ax25_linkfail_register(&nr_linkfail_notifier);
-
-#ifdef CONFIG_SYSCTL
- rc = nr_register_sysctl();
- if (rc)
- goto out_sysctl;
-#endif
-
- nr_loopback_init();
-
- rc = -ENOMEM;
- if (!proc_create_seq("nr", 0444, init_net.proc_net, &nr_info_seqops))
- goto proc_remove1;
- if (!proc_create_seq("nr_neigh", 0444, init_net.proc_net,
- &nr_neigh_seqops))
- goto proc_remove2;
- if (!proc_create_seq("nr_nodes", 0444, init_net.proc_net,
- &nr_node_seqops))
- goto proc_remove3;
-
- return 0;
-
-proc_remove3:
- remove_proc_entry("nr_neigh", init_net.proc_net);
-proc_remove2:
- remove_proc_entry("nr", init_net.proc_net);
-proc_remove1:
-
- nr_loopback_clear();
- nr_rt_free();
-
-#ifdef CONFIG_SYSCTL
- nr_unregister_sysctl();
-out_sysctl:
-#endif
- ax25_linkfail_release(&nr_linkfail_notifier);
- ax25_protocol_release(AX25_P_NETROM);
- unregister_netdevice_notifier(&nr_dev_notifier);
-out_sock:
- sock_unregister(PF_NETROM);
-fail:
- while (--i >= 0) {
- unregister_netdev(dev_nr[i]);
- free_netdev(dev_nr[i]);
- }
- kfree(dev_nr);
-unregister_proto:
- proto_unregister(&nr_proto);
- return rc;
-}
-
-module_init(nr_proto_init);
-
-module_param(nr_ndevs, int, 0);
-MODULE_PARM_DESC(nr_ndevs, "number of NET/ROM devices");
-
-MODULE_AUTHOR("Jonathan Naylor G4KLX <g4klx@g4klx.demon.co.uk>");
-MODULE_DESCRIPTION("The amateur radio NET/ROM network and transport layer protocol");
-MODULE_LICENSE("GPL");
-MODULE_ALIAS_NETPROTO(PF_NETROM);
-
-static void __exit nr_exit(void)
-{
- int i;
-
- remove_proc_entry("nr", init_net.proc_net);
- remove_proc_entry("nr_neigh", init_net.proc_net);
- remove_proc_entry("nr_nodes", init_net.proc_net);
- nr_loopback_clear();
-
- nr_rt_free();
-
-#ifdef CONFIG_SYSCTL
- nr_unregister_sysctl();
-#endif
-
- ax25_linkfail_release(&nr_linkfail_notifier);
- ax25_protocol_release(AX25_P_NETROM);
-
- unregister_netdevice_notifier(&nr_dev_notifier);
-
- sock_unregister(PF_NETROM);
-
- for (i = 0; i < nr_ndevs; i++) {
- struct net_device *dev = dev_nr[i];
- if (dev) {
- unregister_netdev(dev);
- free_netdev(dev);
- }
- }
-
- kfree(dev_nr);
- proto_unregister(&nr_proto);
-}
-module_exit(nr_exit);
+++ /dev/null
-// SPDX-License-Identifier: GPL-2.0-or-later
-/*
- *
- * Copyright Jonathan Naylor G4KLX (g4klx@g4klx.demon.co.uk)
- */
-#include <linux/module.h>
-#include <linux/proc_fs.h>
-#include <linux/kernel.h>
-#include <linux/interrupt.h>
-#include <linux/fs.h>
-#include <linux/types.h>
-#include <linux/sysctl.h>
-#include <linux/string.h>
-#include <linux/socket.h>
-#include <linux/errno.h>
-#include <linux/fcntl.h>
-#include <linux/in.h>
-#include <linux/if_ether.h> /* For the statistics structure. */
-#include <linux/slab.h>
-#include <linux/uaccess.h>
-
-#include <asm/io.h>
-
-#include <linux/inet.h>
-#include <linux/netdevice.h>
-#include <linux/etherdevice.h>
-#include <linux/if_arp.h>
-#include <linux/skbuff.h>
-
-#include <net/ip.h>
-#include <net/arp.h>
-
-#include <net/ax25.h>
-#include <net/netrom.h>
-
-/*
- * Only allow IP over NET/ROM frames through if the netrom device is up.
- */
-
-int nr_rx_ip(struct sk_buff *skb, struct net_device *dev)
-{
- struct net_device_stats *stats = &dev->stats;
-
- if (!netif_running(dev)) {
- stats->rx_dropped++;
- return 0;
- }
-
- stats->rx_packets++;
- stats->rx_bytes += skb->len;
-
- skb->protocol = htons(ETH_P_IP);
-
- /* Spoof incoming device */
- skb->dev = dev;
- skb->mac_header = skb->network_header;
- skb_reset_network_header(skb);
- skb->pkt_type = PACKET_HOST;
-
- netif_rx(skb);
-
- return 1;
-}
-
-static int nr_header(struct sk_buff *skb, struct net_device *dev,
- unsigned short type,
- const void *daddr, const void *saddr, unsigned int len)
-{
- unsigned char *buff = skb_push(skb, NR_NETWORK_LEN + NR_TRANSPORT_LEN);
-
- memcpy(buff, (saddr != NULL) ? saddr : dev->dev_addr, dev->addr_len);
- buff[6] &= ~AX25_CBIT;
- buff[6] &= ~AX25_EBIT;
- buff[6] |= AX25_SSSID_SPARE;
- buff += AX25_ADDR_LEN;
-
- if (daddr != NULL)
- memcpy(buff, daddr, dev->addr_len);
- buff[6] &= ~AX25_CBIT;
- buff[6] |= AX25_EBIT;
- buff[6] |= AX25_SSSID_SPARE;
- buff += AX25_ADDR_LEN;
-
- *buff++ = READ_ONCE(sysctl_netrom_network_ttl_initialiser);
-
- *buff++ = NR_PROTO_IP;
- *buff++ = NR_PROTO_IP;
- *buff++ = 0;
- *buff++ = 0;
- *buff++ = NR_PROTOEXT;
-
- if (daddr != NULL)
- return 37;
-
- return -37;
-}
-
-static int __must_check nr_set_mac_address(struct net_device *dev, void *addr)
-{
- struct sockaddr *sa = addr;
- int err;
-
- if (!memcmp(dev->dev_addr, sa->sa_data, dev->addr_len))
- return 0;
-
- if (dev->flags & IFF_UP) {
- err = ax25_listen_register((ax25_address *)sa->sa_data, NULL);
- if (err)
- return err;
-
- ax25_listen_release((const ax25_address *)dev->dev_addr, NULL);
- }
-
- dev_addr_set(dev, sa->sa_data);
-
- return 0;
-}
-
-static int nr_open(struct net_device *dev)
-{
- int err;
-
- err = ax25_listen_register((const ax25_address *)dev->dev_addr, NULL);
- if (err)
- return err;
-
- netif_start_queue(dev);
-
- return 0;
-}
-
-static int nr_close(struct net_device *dev)
-{
- ax25_listen_release((const ax25_address *)dev->dev_addr, NULL);
- netif_stop_queue(dev);
- return 0;
-}
-
-static netdev_tx_t nr_xmit(struct sk_buff *skb, struct net_device *dev)
-{
- struct net_device_stats *stats = &dev->stats;
- unsigned int len = skb->len;
-
- if (!nr_route_frame(skb, NULL)) {
- kfree_skb(skb);
- stats->tx_errors++;
- return NETDEV_TX_OK;
- }
-
- stats->tx_packets++;
- stats->tx_bytes += len;
-
- return NETDEV_TX_OK;
-}
-
-static const struct header_ops nr_header_ops = {
- .create = nr_header,
-};
-
-static const struct net_device_ops nr_netdev_ops = {
- .ndo_open = nr_open,
- .ndo_stop = nr_close,
- .ndo_start_xmit = nr_xmit,
- .ndo_set_mac_address = nr_set_mac_address,
-};
-
-void nr_setup(struct net_device *dev)
-{
- dev->mtu = NR_MAX_PACKET_SIZE;
- dev->netdev_ops = &nr_netdev_ops;
- dev->header_ops = &nr_header_ops;
- dev->hard_header_len = NR_NETWORK_LEN + NR_TRANSPORT_LEN;
- dev->addr_len = AX25_ADDR_LEN;
- dev->type = ARPHRD_NETROM;
-
- /* New-style flags. */
- dev->flags = IFF_NOARP;
-}
+++ /dev/null
-// SPDX-License-Identifier: GPL-2.0-or-later
-/*
- *
- * Copyright Jonathan Naylor G4KLX (g4klx@g4klx.demon.co.uk)
- * Copyright Darryl Miles G7LED (dlm@g7led.demon.co.uk)
- */
-#include <linux/errno.h>
-#include <linux/types.h>
-#include <linux/socket.h>
-#include <linux/in.h>
-#include <linux/kernel.h>
-#include <linux/timer.h>
-#include <linux/string.h>
-#include <linux/sockios.h>
-#include <linux/net.h>
-#include <linux/slab.h>
-#include <net/ax25.h>
-#include <linux/inet.h>
-#include <linux/netdevice.h>
-#include <linux/skbuff.h>
-#include <net/sock.h>
-#include <net/tcp_states.h>
-#include <linux/uaccess.h>
-#include <linux/fcntl.h>
-#include <linux/mm.h>
-#include <linux/interrupt.h>
-#include <net/netrom.h>
-
-static int nr_queue_rx_frame(struct sock *sk, struct sk_buff *skb, int more)
-{
- struct sk_buff *skbo, *skbn = skb;
- struct nr_sock *nr = nr_sk(sk);
-
- skb_pull(skb, NR_NETWORK_LEN + NR_TRANSPORT_LEN);
-
- nr_start_idletimer(sk);
-
- if (more) {
- nr->fraglen += skb->len;
- skb_queue_tail(&nr->frag_queue, skb);
- return 0;
- }
-
- if (!more && nr->fraglen > 0) { /* End of fragment */
- nr->fraglen += skb->len;
- skb_queue_tail(&nr->frag_queue, skb);
-
- if ((skbn = alloc_skb(nr->fraglen, GFP_ATOMIC)) == NULL)
- return 1;
-
- skb_reset_transport_header(skbn);
-
- while ((skbo = skb_dequeue(&nr->frag_queue)) != NULL) {
- skb_copy_from_linear_data(skbo,
- skb_put(skbn, skbo->len),
- skbo->len);
- kfree_skb(skbo);
- }
-
- nr->fraglen = 0;
- }
-
- return sock_queue_rcv_skb(sk, skbn);
-}
-
-/*
- * State machine for state 1, Awaiting Connection State.
- * The handling of the timer(s) is in file nr_timer.c.
- * Handling of state 0 and connection release is in netrom.c.
- */
-static int nr_state1_machine(struct sock *sk, struct sk_buff *skb,
- int frametype)
-{
- switch (frametype) {
- case NR_CONNACK: {
- struct nr_sock *nr = nr_sk(sk);
-
- nr_stop_t1timer(sk);
- nr_start_idletimer(sk);
- nr->your_index = skb->data[17];
- nr->your_id = skb->data[18];
- nr->vs = 0;
- nr->va = 0;
- nr->vr = 0;
- nr->vl = 0;
- nr->state = NR_STATE_3;
- nr->n2count = 0;
- nr->window = skb->data[20];
- sk->sk_state = TCP_ESTABLISHED;
- if (!sock_flag(sk, SOCK_DEAD))
- sk->sk_state_change(sk);
- break;
- }
-
- case NR_CONNACK | NR_CHOKE_FLAG:
- nr_disconnect(sk, ECONNREFUSED);
- break;
-
- case NR_RESET:
- if (READ_ONCE(sysctl_netrom_reset_circuit))
- nr_disconnect(sk, ECONNRESET);
- break;
-
- default:
- break;
- }
- return 0;
-}
-
-/*
- * State machine for state 2, Awaiting Release State.
- * The handling of the timer(s) is in file nr_timer.c
- * Handling of state 0 and connection release is in netrom.c.
- */
-static int nr_state2_machine(struct sock *sk, struct sk_buff *skb,
- int frametype)
-{
- switch (frametype) {
- case NR_CONNACK | NR_CHOKE_FLAG:
- nr_disconnect(sk, ECONNRESET);
- break;
-
- case NR_DISCREQ:
- nr_write_internal(sk, NR_DISCACK);
- fallthrough;
- case NR_DISCACK:
- nr_disconnect(sk, 0);
- break;
-
- case NR_RESET:
- if (READ_ONCE(sysctl_netrom_reset_circuit))
- nr_disconnect(sk, ECONNRESET);
- break;
-
- default:
- break;
- }
- return 0;
-}
-
-/*
- * State machine for state 3, Connected State.
- * The handling of the timer(s) is in file nr_timer.c
- * Handling of state 0 and connection release is in netrom.c.
- */
-static int nr_state3_machine(struct sock *sk, struct sk_buff *skb, int frametype)
-{
- struct nr_sock *nrom = nr_sk(sk);
- struct sk_buff_head temp_queue;
- struct sk_buff *skbn;
- unsigned short save_vr;
- unsigned short nr, ns;
- int queued = 0;
-
- nr = skb->data[18];
-
- switch (frametype) {
- case NR_CONNREQ:
- nr_write_internal(sk, NR_CONNACK);
- break;
-
- case NR_DISCREQ:
- nr_write_internal(sk, NR_DISCACK);
- nr_disconnect(sk, 0);
- break;
-
- case NR_CONNACK | NR_CHOKE_FLAG:
- case NR_DISCACK:
- nr_disconnect(sk, ECONNRESET);
- break;
-
- case NR_INFOACK:
- case NR_INFOACK | NR_CHOKE_FLAG:
- case NR_INFOACK | NR_NAK_FLAG:
- case NR_INFOACK | NR_NAK_FLAG | NR_CHOKE_FLAG:
- if (frametype & NR_CHOKE_FLAG) {
- nrom->condition |= NR_COND_PEER_RX_BUSY;
- nr_start_t4timer(sk);
- } else {
- nrom->condition &= ~NR_COND_PEER_RX_BUSY;
- nr_stop_t4timer(sk);
- }
- if (!nr_validate_nr(sk, nr)) {
- break;
- }
- if (frametype & NR_NAK_FLAG) {
- nr_frames_acked(sk, nr);
- nr_send_nak_frame(sk);
- } else {
- if (nrom->condition & NR_COND_PEER_RX_BUSY) {
- nr_frames_acked(sk, nr);
- } else {
- nr_check_iframes_acked(sk, nr);
- }
- }
- break;
-
- case NR_INFO:
- case NR_INFO | NR_NAK_FLAG:
- case NR_INFO | NR_CHOKE_FLAG:
- case NR_INFO | NR_MORE_FLAG:
- case NR_INFO | NR_NAK_FLAG | NR_CHOKE_FLAG:
- case NR_INFO | NR_CHOKE_FLAG | NR_MORE_FLAG:
- case NR_INFO | NR_NAK_FLAG | NR_MORE_FLAG:
- case NR_INFO | NR_NAK_FLAG | NR_CHOKE_FLAG | NR_MORE_FLAG:
- if (frametype & NR_CHOKE_FLAG) {
- nrom->condition |= NR_COND_PEER_RX_BUSY;
- nr_start_t4timer(sk);
- } else {
- nrom->condition &= ~NR_COND_PEER_RX_BUSY;
- nr_stop_t4timer(sk);
- }
- if (nr_validate_nr(sk, nr)) {
- if (frametype & NR_NAK_FLAG) {
- nr_frames_acked(sk, nr);
- nr_send_nak_frame(sk);
- } else {
- if (nrom->condition & NR_COND_PEER_RX_BUSY) {
- nr_frames_acked(sk, nr);
- } else {
- nr_check_iframes_acked(sk, nr);
- }
- }
- }
- queued = 1;
- skb_queue_head(&nrom->reseq_queue, skb);
- if (nrom->condition & NR_COND_OWN_RX_BUSY)
- break;
- skb_queue_head_init(&temp_queue);
- do {
- save_vr = nrom->vr;
- while ((skbn = skb_dequeue(&nrom->reseq_queue)) != NULL) {
- ns = skbn->data[17];
- if (ns == nrom->vr) {
- if (nr_queue_rx_frame(sk, skbn, frametype & NR_MORE_FLAG) == 0) {
- nrom->vr = (nrom->vr + 1) % NR_MODULUS;
- } else {
- nrom->condition |= NR_COND_OWN_RX_BUSY;
- skb_queue_tail(&temp_queue, skbn);
- }
- } else if (nr_in_rx_window(sk, ns)) {
- skb_queue_tail(&temp_queue, skbn);
- } else {
- kfree_skb(skbn);
- }
- }
- while ((skbn = skb_dequeue(&temp_queue)) != NULL) {
- skb_queue_tail(&nrom->reseq_queue, skbn);
- }
- } while (save_vr != nrom->vr);
- /*
- * Window is full, ack it immediately.
- */
- if (((nrom->vl + nrom->window) % NR_MODULUS) == nrom->vr) {
- nr_enquiry_response(sk);
- } else {
- if (!(nrom->condition & NR_COND_ACK_PENDING)) {
- nrom->condition |= NR_COND_ACK_PENDING;
- nr_start_t2timer(sk);
- }
- }
- break;
-
- case NR_RESET:
- if (READ_ONCE(sysctl_netrom_reset_circuit))
- nr_disconnect(sk, ECONNRESET);
- break;
-
- default:
- break;
- }
- return queued;
-}
-
-/* Higher level upcall for a LAPB frame - called with sk locked */
-int nr_process_rx_frame(struct sock *sk, struct sk_buff *skb)
-{
- struct nr_sock *nr = nr_sk(sk);
- int queued = 0, frametype;
-
- if (nr->state == NR_STATE_0)
- return 0;
-
- frametype = skb->data[19];
-
- switch (nr->state) {
- case NR_STATE_1:
- queued = nr_state1_machine(sk, skb, frametype);
- break;
- case NR_STATE_2:
- queued = nr_state2_machine(sk, skb, frametype);
- break;
- case NR_STATE_3:
- queued = nr_state3_machine(sk, skb, frametype);
- break;
- }
-
- nr_kick(sk);
-
- return queued;
-}
+++ /dev/null
-// SPDX-License-Identifier: GPL-2.0-or-later
-/*
- *
- * Copyright Tomi Manninen OH2BNS (oh2bns@sral.fi)
- */
-#include <linux/types.h>
-#include <linux/slab.h>
-#include <linux/socket.h>
-#include <linux/timer.h>
-#include <net/ax25.h>
-#include <linux/skbuff.h>
-#include <net/netrom.h>
-#include <linux/init.h>
-
-static void nr_loopback_timer(struct timer_list *);
-
-static struct sk_buff_head loopback_queue;
-static DEFINE_TIMER(loopback_timer, nr_loopback_timer);
-
-void __init nr_loopback_init(void)
-{
- skb_queue_head_init(&loopback_queue);
-}
-
-static inline int nr_loopback_running(void)
-{
- return timer_pending(&loopback_timer);
-}
-
-int nr_loopback_queue(struct sk_buff *skb)
-{
- struct sk_buff *skbn;
-
- if ((skbn = alloc_skb(skb->len, GFP_ATOMIC)) != NULL) {
- skb_copy_from_linear_data(skb, skb_put(skbn, skb->len), skb->len);
- skb_reset_transport_header(skbn);
-
- skb_queue_tail(&loopback_queue, skbn);
-
- if (!nr_loopback_running())
- mod_timer(&loopback_timer, jiffies + 10);
- }
-
- kfree_skb(skb);
- return 1;
-}
-
-static void nr_loopback_timer(struct timer_list *unused)
-{
- struct sk_buff *skb;
- ax25_address *nr_dest;
- struct net_device *dev;
-
- if ((skb = skb_dequeue(&loopback_queue)) != NULL) {
- nr_dest = (ax25_address *)(skb->data + 7);
-
- dev = nr_dev_get(nr_dest);
-
- if (dev == NULL || nr_rx_frame(skb, dev) == 0)
- kfree_skb(skb);
-
- dev_put(dev);
-
- if (!skb_queue_empty(&loopback_queue) && !nr_loopback_running())
- mod_timer(&loopback_timer, jiffies + 10);
- }
-}
-
-void nr_loopback_clear(void)
-{
- timer_delete_sync(&loopback_timer);
- skb_queue_purge(&loopback_queue);
-}
+++ /dev/null
-// SPDX-License-Identifier: GPL-2.0-or-later
-/*
- *
- * Copyright Jonathan Naylor G4KLX (g4klx@g4klx.demon.co.uk)
- * Copyright Darryl Miles G7LED (dlm@g7led.demon.co.uk)
- */
-#include <linux/errno.h>
-#include <linux/types.h>
-#include <linux/socket.h>
-#include <linux/in.h>
-#include <linux/kernel.h>
-#include <linux/timer.h>
-#include <linux/string.h>
-#include <linux/sockios.h>
-#include <linux/net.h>
-#include <linux/slab.h>
-#include <net/ax25.h>
-#include <linux/inet.h>
-#include <linux/netdevice.h>
-#include <linux/skbuff.h>
-#include <net/sock.h>
-#include <linux/uaccess.h>
-#include <linux/fcntl.h>
-#include <linux/mm.h>
-#include <linux/interrupt.h>
-#include <net/netrom.h>
-
-/*
- * This is where all NET/ROM frames pass, except for IP-over-NET/ROM which
- * cannot be fragmented in this manner.
- */
-void nr_output(struct sock *sk, struct sk_buff *skb)
-{
- struct sk_buff *skbn;
- unsigned char transport[NR_TRANSPORT_LEN];
- int err, frontlen, len;
-
- if (skb->len - NR_TRANSPORT_LEN > NR_MAX_PACKET_SIZE) {
- /* Save a copy of the Transport Header */
- skb_copy_from_linear_data(skb, transport, NR_TRANSPORT_LEN);
- skb_pull(skb, NR_TRANSPORT_LEN);
-
- frontlen = skb_headroom(skb);
-
- while (skb->len > 0) {
- if ((skbn = sock_alloc_send_skb(sk, frontlen + NR_MAX_PACKET_SIZE, 0, &err)) == NULL) {
- kfree_skb(skb);
- return;
- }
-
- skb_reserve(skbn, frontlen);
-
- len = (NR_MAX_PACKET_SIZE > skb->len) ? skb->len : NR_MAX_PACKET_SIZE;
-
- /* Copy the user data */
- skb_copy_from_linear_data(skb, skb_put(skbn, len), len);
- skb_pull(skb, len);
-
- /* Duplicate the Transport Header */
- skb_push(skbn, NR_TRANSPORT_LEN);
- skb_copy_to_linear_data(skbn, transport,
- NR_TRANSPORT_LEN);
- if (skb->len > 0)
- skbn->data[4] |= NR_MORE_FLAG;
-
- skb_queue_tail(&sk->sk_write_queue, skbn); /* Throw it on the queue */
- }
-
- kfree_skb(skb);
- } else {
- skb_queue_tail(&sk->sk_write_queue, skb); /* Throw it on the queue */
- }
-
- nr_kick(sk);
-}
-
-/*
- * This procedure is passed a buffer descriptor for an iframe. It builds
- * the rest of the control part of the frame and then writes it out.
- */
-static void nr_send_iframe(struct sock *sk, struct sk_buff *skb)
-{
- struct nr_sock *nr = nr_sk(sk);
-
- if (skb == NULL)
- return;
-
- skb->data[2] = nr->vs;
- skb->data[3] = nr->vr;
-
- if (nr->condition & NR_COND_OWN_RX_BUSY)
- skb->data[4] |= NR_CHOKE_FLAG;
-
- nr_start_idletimer(sk);
-
- nr_transmit_buffer(sk, skb);
-}
-
-void nr_send_nak_frame(struct sock *sk)
-{
- struct sk_buff *skb, *skbn;
- struct nr_sock *nr = nr_sk(sk);
-
- if ((skb = skb_peek(&nr->ack_queue)) == NULL)
- return;
-
- if ((skbn = skb_clone(skb, GFP_ATOMIC)) == NULL)
- return;
-
- skbn->data[2] = nr->va;
- skbn->data[3] = nr->vr;
-
- if (nr->condition & NR_COND_OWN_RX_BUSY)
- skbn->data[4] |= NR_CHOKE_FLAG;
-
- nr_transmit_buffer(sk, skbn);
-
- nr->condition &= ~NR_COND_ACK_PENDING;
- nr->vl = nr->vr;
-
- nr_stop_t1timer(sk);
-}
-
-void nr_kick(struct sock *sk)
-{
- struct nr_sock *nr = nr_sk(sk);
- struct sk_buff *skb, *skbn;
- unsigned short start, end;
-
- if (nr->state != NR_STATE_3)
- return;
-
- if (nr->condition & NR_COND_PEER_RX_BUSY)
- return;
-
- if (!skb_peek(&sk->sk_write_queue))
- return;
-
- start = (skb_peek(&nr->ack_queue) == NULL) ? nr->va : nr->vs;
- end = (nr->va + nr->window) % NR_MODULUS;
-
- if (start == end)
- return;
-
- nr->vs = start;
-
- /*
- * Transmit data until either we're out of data to send or
- * the window is full.
- */
-
- /*
- * Dequeue the frame and copy it.
- */
- skb = skb_dequeue(&sk->sk_write_queue);
-
- do {
- if ((skbn = skb_clone(skb, GFP_ATOMIC)) == NULL) {
- skb_queue_head(&sk->sk_write_queue, skb);
- break;
- }
-
- skb_set_owner_w(skbn, sk);
-
- /*
- * Transmit the frame copy.
- */
- nr_send_iframe(sk, skbn);
-
- nr->vs = (nr->vs + 1) % NR_MODULUS;
-
- /*
- * Requeue the original data frame.
- */
- skb_queue_tail(&nr->ack_queue, skb);
-
- } while (nr->vs != end &&
- (skb = skb_dequeue(&sk->sk_write_queue)) != NULL);
-
- nr->vl = nr->vr;
- nr->condition &= ~NR_COND_ACK_PENDING;
-
- if (!nr_t1timer_running(sk))
- nr_start_t1timer(sk);
-}
-
-void nr_transmit_buffer(struct sock *sk, struct sk_buff *skb)
-{
- struct nr_sock *nr = nr_sk(sk);
- unsigned char *dptr;
-
- /*
- * Add the protocol byte and network header.
- */
- dptr = skb_push(skb, NR_NETWORK_LEN);
-
- memcpy(dptr, &nr->source_addr, AX25_ADDR_LEN);
- dptr[6] &= ~AX25_CBIT;
- dptr[6] &= ~AX25_EBIT;
- dptr[6] |= AX25_SSSID_SPARE;
- dptr += AX25_ADDR_LEN;
-
- memcpy(dptr, &nr->dest_addr, AX25_ADDR_LEN);
- dptr[6] &= ~AX25_CBIT;
- dptr[6] |= AX25_EBIT;
- dptr[6] |= AX25_SSSID_SPARE;
- dptr += AX25_ADDR_LEN;
-
- *dptr++ = READ_ONCE(sysctl_netrom_network_ttl_initialiser);
-
- if (!nr_route_frame(skb, NULL)) {
- kfree_skb(skb);
- nr_disconnect(sk, ENETUNREACH);
- }
-}
-
-/*
- * The following routines are taken from page 170 of the 7th ARRL Computer
- * Networking Conference paper, as is the whole state machine.
- */
-
-void nr_establish_data_link(struct sock *sk)
-{
- struct nr_sock *nr = nr_sk(sk);
-
- nr->condition = 0x00;
- nr->n2count = 0;
-
- nr_write_internal(sk, NR_CONNREQ);
-
- nr_stop_t2timer(sk);
- nr_stop_t4timer(sk);
- nr_stop_idletimer(sk);
- nr_start_t1timer(sk);
-}
-
-/*
- * Never send a NAK when we are CHOKEd.
- */
-void nr_enquiry_response(struct sock *sk)
-{
- struct nr_sock *nr = nr_sk(sk);
- int frametype = NR_INFOACK;
-
- if (nr->condition & NR_COND_OWN_RX_BUSY) {
- frametype |= NR_CHOKE_FLAG;
- } else {
- if (skb_peek(&nr->reseq_queue) != NULL)
- frametype |= NR_NAK_FLAG;
- }
-
- nr_write_internal(sk, frametype);
-
- nr->vl = nr->vr;
- nr->condition &= ~NR_COND_ACK_PENDING;
-}
-
-void nr_check_iframes_acked(struct sock *sk, unsigned short nr)
-{
- struct nr_sock *nrom = nr_sk(sk);
-
- if (nrom->vs == nr) {
- nr_frames_acked(sk, nr);
- nr_stop_t1timer(sk);
- nrom->n2count = 0;
- } else {
- if (nrom->va != nr) {
- nr_frames_acked(sk, nr);
- nr_start_t1timer(sk);
- }
- }
-}
+++ /dev/null
-// SPDX-License-Identifier: GPL-2.0-or-later
-/*
- *
- * Copyright Jonathan Naylor G4KLX (g4klx@g4klx.demon.co.uk)
- * Copyright Alan Cox GW4PTS (alan@lxorguk.ukuu.org.uk)
- * Copyright Tomi Manninen OH2BNS (oh2bns@sral.fi)
- */
-#include <linux/errno.h>
-#include <linux/types.h>
-#include <linux/socket.h>
-#include <linux/in.h>
-#include <linux/kernel.h>
-#include <linux/timer.h>
-#include <linux/string.h>
-#include <linux/sockios.h>
-#include <linux/net.h>
-#include <linux/slab.h>
-#include <net/ax25.h>
-#include <linux/inet.h>
-#include <linux/netdevice.h>
-#include <net/arp.h>
-#include <linux/if_arp.h>
-#include <linux/skbuff.h>
-#include <net/sock.h>
-#include <linux/uaccess.h>
-#include <linux/fcntl.h>
-#include <linux/termios.h> /* For TIOCINQ/OUTQ */
-#include <linux/mm.h>
-#include <linux/interrupt.h>
-#include <linux/notifier.h>
-#include <linux/init.h>
-#include <linux/spinlock.h>
-#include <net/netrom.h>
-#include <linux/seq_file.h>
-#include <linux/export.h>
-
-static unsigned int nr_neigh_no = 1;
-
-static HLIST_HEAD(nr_node_list);
-static DEFINE_SPINLOCK(nr_node_list_lock);
-static HLIST_HEAD(nr_neigh_list);
-static DEFINE_SPINLOCK(nr_neigh_list_lock);
-
-static struct nr_node *nr_node_get(ax25_address *callsign)
-{
- struct nr_node *found = NULL;
- struct nr_node *nr_node;
-
- spin_lock_bh(&nr_node_list_lock);
- nr_node_for_each(nr_node, &nr_node_list)
- if (ax25cmp(callsign, &nr_node->callsign) == 0) {
- nr_node_hold(nr_node);
- found = nr_node;
- break;
- }
- spin_unlock_bh(&nr_node_list_lock);
- return found;
-}
-
-static struct nr_neigh *nr_neigh_get_dev(ax25_address *callsign,
- struct net_device *dev)
-{
- struct nr_neigh *found = NULL;
- struct nr_neigh *nr_neigh;
-
- spin_lock_bh(&nr_neigh_list_lock);
- nr_neigh_for_each(nr_neigh, &nr_neigh_list)
- if (ax25cmp(callsign, &nr_neigh->callsign) == 0 &&
- nr_neigh->dev == dev) {
- nr_neigh_hold(nr_neigh);
- found = nr_neigh;
- break;
- }
- spin_unlock_bh(&nr_neigh_list_lock);
- return found;
-}
-
-static void nr_remove_neigh(struct nr_neigh *);
-
-/* re-sort the routes in quality order. */
-static void re_sort_routes(struct nr_node *nr_node, int x, int y)
-{
- if (nr_node->routes[y].quality > nr_node->routes[x].quality) {
- if (nr_node->which == x)
- nr_node->which = y;
- else if (nr_node->which == y)
- nr_node->which = x;
-
- swap(nr_node->routes[x], nr_node->routes[y]);
- }
-}
-
-/*
- * Add a new route to a node, and in the process add the node and the
- * neighbour if it is new.
- */
-static int __must_check nr_add_node(ax25_address *nr, const char *mnemonic,
- ax25_address *ax25, ax25_digi *ax25_digi, struct net_device *dev,
- int quality, int obs_count)
-{
- struct nr_node *nr_node;
- struct nr_neigh *nr_neigh;
- int i, found;
- struct net_device *odev;
-
- if ((odev=nr_dev_get(nr)) != NULL) { /* Can't add routes to ourself */
- dev_put(odev);
- return -EINVAL;
- }
-
- nr_node = nr_node_get(nr);
-
- nr_neigh = nr_neigh_get_dev(ax25, dev);
-
- /*
- * The L2 link to a neighbour has failed in the past
- * and now a frame comes from this neighbour. We assume
- * it was a temporary trouble with the link and reset the
- * routes now (and not wait for a node broadcast).
- */
- if (nr_neigh != NULL && nr_neigh->failed != 0 && quality == 0) {
- struct nr_node *nr_nodet;
-
- spin_lock_bh(&nr_node_list_lock);
- nr_node_for_each(nr_nodet, &nr_node_list) {
- nr_node_lock(nr_nodet);
- for (i = 0; i < nr_nodet->count; i++)
- if (nr_nodet->routes[i].neighbour == nr_neigh)
- if (i < nr_nodet->which)
- nr_nodet->which = i;
- nr_node_unlock(nr_nodet);
- }
- spin_unlock_bh(&nr_node_list_lock);
- }
-
- if (nr_neigh != NULL)
- nr_neigh->failed = 0;
-
- if (quality == 0 && nr_neigh != NULL && nr_node != NULL) {
- nr_neigh_put(nr_neigh);
- nr_node_put(nr_node);
- return 0;
- }
-
- if (nr_neigh == NULL) {
- if ((nr_neigh = kmalloc(sizeof(*nr_neigh), GFP_ATOMIC)) == NULL) {
- if (nr_node)
- nr_node_put(nr_node);
- return -ENOMEM;
- }
-
- nr_neigh->callsign = *ax25;
- nr_neigh->digipeat = NULL;
- nr_neigh->ax25 = NULL;
- nr_neigh->dev = dev;
- nr_neigh->quality = READ_ONCE(sysctl_netrom_default_path_quality);
- nr_neigh->locked = 0;
- nr_neigh->count = 0;
- nr_neigh->number = nr_neigh_no++;
- nr_neigh->failed = 0;
- refcount_set(&nr_neigh->refcount, 1);
-
- if (ax25_digi != NULL && ax25_digi->ndigi > 0) {
- nr_neigh->digipeat = kmemdup(ax25_digi,
- sizeof(*ax25_digi),
- GFP_KERNEL);
- if (nr_neigh->digipeat == NULL) {
- kfree(nr_neigh);
- if (nr_node)
- nr_node_put(nr_node);
- return -ENOMEM;
- }
- }
-
- spin_lock_bh(&nr_neigh_list_lock);
- hlist_add_head(&nr_neigh->neigh_node, &nr_neigh_list);
- nr_neigh_hold(nr_neigh);
- spin_unlock_bh(&nr_neigh_list_lock);
- }
-
- if (quality != 0 && ax25cmp(nr, ax25) == 0 && !nr_neigh->locked)
- nr_neigh->quality = quality;
-
- if (nr_node == NULL) {
- if ((nr_node = kmalloc(sizeof(*nr_node), GFP_ATOMIC)) == NULL) {
- if (nr_neigh)
- nr_neigh_put(nr_neigh);
- return -ENOMEM;
- }
-
- nr_node->callsign = *nr;
- strscpy(nr_node->mnemonic, mnemonic);
-
- nr_node->which = 0;
- nr_node->count = 1;
- refcount_set(&nr_node->refcount, 1);
- spin_lock_init(&nr_node->node_lock);
-
- nr_node->routes[0].quality = quality;
- nr_node->routes[0].obs_count = obs_count;
- nr_node->routes[0].neighbour = nr_neigh;
-
- nr_neigh_hold(nr_neigh);
- nr_neigh->count++;
-
- spin_lock_bh(&nr_node_list_lock);
- hlist_add_head(&nr_node->node_node, &nr_node_list);
- /* refcount initialized at 1 */
- spin_unlock_bh(&nr_node_list_lock);
-
- nr_neigh_put(nr_neigh);
- return 0;
- }
- nr_node_lock(nr_node);
-
- if (quality != 0)
- strscpy(nr_node->mnemonic, mnemonic);
-
- for (found = 0, i = 0; i < nr_node->count; i++) {
- if (nr_node->routes[i].neighbour == nr_neigh) {
- nr_node->routes[i].quality = quality;
- nr_node->routes[i].obs_count = obs_count;
- found = 1;
- break;
- }
- }
-
- if (!found) {
- /* We have space at the bottom, slot it in */
- if (nr_node->count < 3) {
- nr_node->routes[2] = nr_node->routes[1];
- nr_node->routes[1] = nr_node->routes[0];
-
- nr_node->routes[0].quality = quality;
- nr_node->routes[0].obs_count = obs_count;
- nr_node->routes[0].neighbour = nr_neigh;
-
- nr_node->which++;
- nr_node->count++;
- nr_neigh_hold(nr_neigh);
- nr_neigh->count++;
- } else {
- /* It must be better than the worst */
- if (quality > nr_node->routes[2].quality) {
- nr_node->routes[2].neighbour->count--;
- nr_neigh_put(nr_node->routes[2].neighbour);
-
- if (nr_node->routes[2].neighbour->count == 0 && !nr_node->routes[2].neighbour->locked)
- nr_remove_neigh(nr_node->routes[2].neighbour);
-
- nr_node->routes[2].quality = quality;
- nr_node->routes[2].obs_count = obs_count;
- nr_node->routes[2].neighbour = nr_neigh;
-
- nr_neigh_hold(nr_neigh);
- nr_neigh->count++;
- }
- }
- }
-
- /* Now re-sort the routes in quality order */
- switch (nr_node->count) {
- case 3:
- re_sort_routes(nr_node, 0, 1);
- re_sort_routes(nr_node, 1, 2);
- fallthrough;
- case 2:
- re_sort_routes(nr_node, 0, 1);
- break;
- case 1:
- break;
- }
-
- for (i = 0; i < nr_node->count; i++) {
- if (nr_node->routes[i].neighbour == nr_neigh) {
- if (i < nr_node->which)
- nr_node->which = i;
- break;
- }
- }
-
- nr_neigh_put(nr_neigh);
- nr_node_unlock(nr_node);
- nr_node_put(nr_node);
- return 0;
-}
-
-static void nr_remove_node_locked(struct nr_node *nr_node)
-{
- lockdep_assert_held(&nr_node_list_lock);
-
- hlist_del_init(&nr_node->node_node);
- nr_node_put(nr_node);
-}
-
-static inline void __nr_remove_neigh(struct nr_neigh *nr_neigh)
-{
- hlist_del_init(&nr_neigh->neigh_node);
- nr_neigh_put(nr_neigh);
-}
-
-#define nr_remove_neigh_locked(__neigh) \
- __nr_remove_neigh(__neigh)
-
-static void nr_remove_neigh(struct nr_neigh *nr_neigh)
-{
- spin_lock_bh(&nr_neigh_list_lock);
- __nr_remove_neigh(nr_neigh);
- spin_unlock_bh(&nr_neigh_list_lock);
-}
-
-/*
- * "Delete" a node. Strictly speaking remove a route to a node. The node
- * is only deleted if no routes are left to it.
- */
-static int nr_del_node(ax25_address *callsign, ax25_address *neighbour, struct net_device *dev)
-{
- struct nr_node *nr_node;
- struct nr_neigh *nr_neigh;
- int i;
-
- nr_node = nr_node_get(callsign);
-
- if (nr_node == NULL)
- return -EINVAL;
-
- nr_neigh = nr_neigh_get_dev(neighbour, dev);
-
- if (nr_neigh == NULL) {
- nr_node_put(nr_node);
- return -EINVAL;
- }
-
- spin_lock_bh(&nr_node_list_lock);
- nr_node_lock(nr_node);
- for (i = 0; i < nr_node->count; i++) {
- if (nr_node->routes[i].neighbour == nr_neigh) {
- nr_neigh->count--;
- nr_neigh_put(nr_neigh);
-
- if (nr_neigh->count == 0 && !nr_neigh->locked)
- nr_remove_neigh(nr_neigh);
- nr_neigh_put(nr_neigh);
-
- nr_node->count--;
-
- if (nr_node->count == 0) {
- nr_remove_node_locked(nr_node);
- } else {
- switch (i) {
- case 0:
- nr_node->routes[0] = nr_node->routes[1];
- fallthrough;
- case 1:
- nr_node->routes[1] = nr_node->routes[2];
- fallthrough;
- case 2:
- break;
- }
- nr_node_put(nr_node);
- }
- nr_node_unlock(nr_node);
- spin_unlock_bh(&nr_node_list_lock);
-
- return 0;
- }
- }
- nr_neigh_put(nr_neigh);
- nr_node_unlock(nr_node);
- spin_unlock_bh(&nr_node_list_lock);
- nr_node_put(nr_node);
-
- return -EINVAL;
-}
-
-/*
- * Lock a neighbour with a quality.
- */
-static int __must_check nr_add_neigh(ax25_address *callsign,
- ax25_digi *ax25_digi, struct net_device *dev, unsigned int quality)
-{
- struct nr_neigh *nr_neigh;
-
- nr_neigh = nr_neigh_get_dev(callsign, dev);
- if (nr_neigh) {
- nr_neigh->quality = quality;
- nr_neigh->locked = 1;
- nr_neigh_put(nr_neigh);
- return 0;
- }
-
- if ((nr_neigh = kmalloc(sizeof(*nr_neigh), GFP_ATOMIC)) == NULL)
- return -ENOMEM;
-
- nr_neigh->callsign = *callsign;
- nr_neigh->digipeat = NULL;
- nr_neigh->ax25 = NULL;
- nr_neigh->dev = dev;
- nr_neigh->quality = quality;
- nr_neigh->locked = 1;
- nr_neigh->count = 0;
- nr_neigh->number = nr_neigh_no++;
- nr_neigh->failed = 0;
- refcount_set(&nr_neigh->refcount, 1);
-
- if (ax25_digi != NULL && ax25_digi->ndigi > 0) {
- nr_neigh->digipeat = kmemdup(ax25_digi, sizeof(*ax25_digi),
- GFP_KERNEL);
- if (nr_neigh->digipeat == NULL) {
- kfree(nr_neigh);
- return -ENOMEM;
- }
- }
-
- spin_lock_bh(&nr_neigh_list_lock);
- hlist_add_head(&nr_neigh->neigh_node, &nr_neigh_list);
- /* refcount is initialized at 1 */
- spin_unlock_bh(&nr_neigh_list_lock);
-
- return 0;
-}
-
-/*
- * "Delete" a neighbour. The neighbour is only removed if the number
- * of nodes that may use it is zero.
- */
-static int nr_del_neigh(ax25_address *callsign, struct net_device *dev, unsigned int quality)
-{
- struct nr_neigh *nr_neigh;
-
- nr_neigh = nr_neigh_get_dev(callsign, dev);
-
- if (nr_neigh == NULL) return -EINVAL;
-
- nr_neigh->quality = quality;
- nr_neigh->locked = 0;
-
- if (nr_neigh->count == 0)
- nr_remove_neigh(nr_neigh);
- nr_neigh_put(nr_neigh);
-
- return 0;
-}
-
-/*
- * Decrement the obsolescence count by one. If a route is reduced to a
- * count of zero, remove it. Also remove any unlocked neighbours with
- * zero nodes routing via it.
- */
-static int nr_dec_obs(void)
-{
- struct nr_neigh *nr_neigh;
- struct nr_node *s;
- struct hlist_node *nodet;
- int i;
-
- spin_lock_bh(&nr_node_list_lock);
- nr_node_for_each_safe(s, nodet, &nr_node_list) {
- nr_node_lock(s);
- for (i = 0; i < s->count; i++) {
- switch (s->routes[i].obs_count) {
- case 0: /* A locked entry */
- break;
-
- case 1: /* From 1 -> 0 */
- nr_neigh = s->routes[i].neighbour;
-
- nr_neigh->count--;
- nr_neigh_put(nr_neigh);
-
- if (nr_neigh->count == 0 && !nr_neigh->locked)
- nr_remove_neigh(nr_neigh);
-
- s->count--;
-
- switch (i) {
- case 0:
- s->routes[0] = s->routes[1];
- fallthrough;
- case 1:
- s->routes[1] = s->routes[2];
- break;
- case 2:
- break;
- }
- break;
-
- default:
- s->routes[i].obs_count--;
- break;
-
- }
- }
-
- if (s->count <= 0)
- nr_remove_node_locked(s);
- nr_node_unlock(s);
- }
- spin_unlock_bh(&nr_node_list_lock);
-
- return 0;
-}
-
-/*
- * A device has been removed. Remove its routes and neighbours.
- */
-void nr_rt_device_down(struct net_device *dev)
-{
- struct nr_neigh *s;
- struct hlist_node *nodet, *node2t;
- struct nr_node *t;
- int i;
-
- spin_lock_bh(&nr_neigh_list_lock);
- nr_neigh_for_each_safe(s, nodet, &nr_neigh_list) {
- if (s->dev == dev) {
- spin_lock_bh(&nr_node_list_lock);
- nr_node_for_each_safe(t, node2t, &nr_node_list) {
- nr_node_lock(t);
- for (i = 0; i < t->count; i++) {
- if (t->routes[i].neighbour == s) {
- t->count--;
-
- switch (i) {
- case 0:
- t->routes[0] = t->routes[1];
- fallthrough;
- case 1:
- t->routes[1] = t->routes[2];
- break;
- case 2:
- break;
- }
- }
- }
-
- if (t->count <= 0)
- nr_remove_node_locked(t);
- nr_node_unlock(t);
- }
- spin_unlock_bh(&nr_node_list_lock);
-
- nr_remove_neigh_locked(s);
- }
- }
- spin_unlock_bh(&nr_neigh_list_lock);
-}
-
-/*
- * Check that the device given is a valid AX.25 interface that is "up".
- * Or a valid ethernet interface with an AX.25 callsign binding.
- */
-static struct net_device *nr_ax25_dev_get(char *devname)
-{
- struct net_device *dev;
-
- if ((dev = dev_get_by_name(&init_net, devname)) == NULL)
- return NULL;
-
- if ((dev->flags & IFF_UP) && dev->type == ARPHRD_AX25)
- return dev;
-
- dev_put(dev);
- return NULL;
-}
-
-/*
- * Find the first active NET/ROM device, usually "nr0".
- */
-struct net_device *nr_dev_first(void)
-{
- struct net_device *dev, *first = NULL;
-
- rcu_read_lock();
- for_each_netdev_rcu(&init_net, dev) {
- if ((dev->flags & IFF_UP) && dev->type == ARPHRD_NETROM)
- if (first == NULL || strncmp(dev->name, first->name, 3) < 0)
- first = dev;
- }
- dev_hold(first);
- rcu_read_unlock();
-
- return first;
-}
-
-/*
- * Find the NET/ROM device for the given callsign.
- */
-struct net_device *nr_dev_get(ax25_address *addr)
-{
- struct net_device *dev;
-
- rcu_read_lock();
- for_each_netdev_rcu(&init_net, dev) {
- if ((dev->flags & IFF_UP) && dev->type == ARPHRD_NETROM &&
- ax25cmp(addr, (const ax25_address *)dev->dev_addr) == 0) {
- dev_hold(dev);
- goto out;
- }
- }
- dev = NULL;
-out:
- rcu_read_unlock();
- return dev;
-}
-
-static ax25_digi *nr_call_to_digi(ax25_digi *digi, int ndigis,
- ax25_address *digipeaters)
-{
- int i;
-
- if (ndigis == 0)
- return NULL;
-
- for (i = 0; i < ndigis; i++) {
- digi->calls[i] = digipeaters[i];
- digi->repeated[i] = 0;
- }
-
- digi->ndigi = ndigis;
- digi->lastrepeat = -1;
-
- return digi;
-}
-
-/*
- * Handle the ioctls that control the routing functions.
- */
-int nr_rt_ioctl(unsigned int cmd, void __user *arg)
-{
- struct nr_route_struct nr_route;
- struct net_device *dev;
- ax25_digi digi;
- int ret;
-
- switch (cmd) {
- case SIOCADDRT:
- if (copy_from_user(&nr_route, arg, sizeof(struct nr_route_struct)))
- return -EFAULT;
- if (nr_route.ndigis > AX25_MAX_DIGIS)
- return -EINVAL;
- if ((dev = nr_ax25_dev_get(nr_route.device)) == NULL)
- return -EINVAL;
- switch (nr_route.type) {
- case NETROM_NODE:
- if (strnlen(nr_route.mnemonic, 7) == 7) {
- ret = -EINVAL;
- break;
- }
-
- ret = nr_add_node(&nr_route.callsign,
- nr_route.mnemonic,
- &nr_route.neighbour,
- nr_call_to_digi(&digi, nr_route.ndigis,
- nr_route.digipeaters),
- dev, nr_route.quality,
- nr_route.obs_count);
- break;
- case NETROM_NEIGH:
- ret = nr_add_neigh(&nr_route.callsign,
- nr_call_to_digi(&digi, nr_route.ndigis,
- nr_route.digipeaters),
- dev, nr_route.quality);
- break;
- default:
- ret = -EINVAL;
- }
- dev_put(dev);
- return ret;
-
- case SIOCDELRT:
- if (copy_from_user(&nr_route, arg, sizeof(struct nr_route_struct)))
- return -EFAULT;
- if ((dev = nr_ax25_dev_get(nr_route.device)) == NULL)
- return -EINVAL;
- switch (nr_route.type) {
- case NETROM_NODE:
- ret = nr_del_node(&nr_route.callsign,
- &nr_route.neighbour, dev);
- break;
- case NETROM_NEIGH:
- ret = nr_del_neigh(&nr_route.callsign,
- dev, nr_route.quality);
- break;
- default:
- ret = -EINVAL;
- }
- dev_put(dev);
- return ret;
-
- case SIOCNRDECOBS:
- return nr_dec_obs();
-
- default:
- return -EINVAL;
- }
-
- return 0;
-}
-
-/*
- * A level 2 link has timed out, therefore it appears to be a poor link,
- * then don't use that neighbour until it is reset.
- */
-void nr_link_failed(ax25_cb *ax25, int reason)
-{
- struct nr_neigh *s, *nr_neigh = NULL;
- struct nr_node *nr_node = NULL;
-
- spin_lock_bh(&nr_neigh_list_lock);
- nr_neigh_for_each(s, &nr_neigh_list) {
- if (s->ax25 == ax25) {
- nr_neigh_hold(s);
- nr_neigh = s;
- break;
- }
- }
- spin_unlock_bh(&nr_neigh_list_lock);
-
- if (nr_neigh == NULL)
- return;
-
- nr_neigh->ax25 = NULL;
- ax25_cb_put(ax25);
-
- if (++nr_neigh->failed < READ_ONCE(sysctl_netrom_link_fails_count)) {
- nr_neigh_put(nr_neigh);
- return;
- }
- spin_lock_bh(&nr_node_list_lock);
- nr_node_for_each(nr_node, &nr_node_list) {
- nr_node_lock(nr_node);
- if (nr_node->which < nr_node->count &&
- nr_node->routes[nr_node->which].neighbour == nr_neigh)
- nr_node->which++;
- nr_node_unlock(nr_node);
- }
- spin_unlock_bh(&nr_node_list_lock);
- nr_neigh_put(nr_neigh);
-}
-
-/*
- * Route a frame to an appropriate AX.25 connection. A NULL ax25_cb
- * indicates an internally generated frame.
- */
-int nr_route_frame(struct sk_buff *skb, ax25_cb *ax25)
-{
- ax25_address *nr_src, *nr_dest;
- struct nr_neigh *nr_neigh;
- struct nr_node *nr_node;
- struct net_device *dev;
- unsigned char *dptr;
- ax25_cb *ax25s;
- int ret;
- struct sk_buff *nskb, *oskb;
-
- /*
- * Reject malformed packets early. Check that it contains at least 2
- * addresses and 1 byte more for Time-To-Live
- */
- if (skb->len < 2 * sizeof(ax25_address) + 1)
- return 0;
-
- nr_src = (ax25_address *)(skb->data + 0);
- nr_dest = (ax25_address *)(skb->data + 7);
-
- if (ax25 != NULL) {
- ret = nr_add_node(nr_src, "", &ax25->dest_addr, ax25->digipeat,
- ax25->ax25_dev->dev, 0,
- READ_ONCE(sysctl_netrom_obsolescence_count_initialiser));
- if (ret)
- return ret;
- }
-
- if ((dev = nr_dev_get(nr_dest)) != NULL) { /* Its for me */
- if (ax25 == NULL) /* Its from me */
- ret = nr_loopback_queue(skb);
- else
- ret = nr_rx_frame(skb, dev);
- dev_put(dev);
- return ret;
- }
-
- if (!READ_ONCE(sysctl_netrom_routing_control) && ax25 != NULL)
- return 0;
-
- /* Its Time-To-Live has expired */
- if (skb->data[14] == 1) {
- return 0;
- }
-
- nr_node = nr_node_get(nr_dest);
- if (nr_node == NULL)
- return 0;
- nr_node_lock(nr_node);
-
- if (nr_node->which >= nr_node->count) {
- nr_node_unlock(nr_node);
- nr_node_put(nr_node);
- return 0;
- }
-
- nr_neigh = nr_node->routes[nr_node->which].neighbour;
-
- if ((dev = nr_dev_first()) == NULL) {
- nr_node_unlock(nr_node);
- nr_node_put(nr_node);
- return 0;
- }
-
- /* We are going to change the netrom headers so we should get our
- own skb, we also did not know until now how much header space
- we had to reserve... - RXQ */
- nskb = skb_copy_expand(skb, dev->hard_header_len, 0, GFP_ATOMIC);
-
- if (!nskb) {
- nr_node_unlock(nr_node);
- nr_node_put(nr_node);
- dev_put(dev);
- return 0;
- }
- oskb = skb;
- skb = nskb;
- skb->data[14]--;
-
- dptr = skb_push(skb, 1);
- *dptr = AX25_P_NETROM;
-
- ax25s = nr_neigh->ax25;
- nr_neigh->ax25 = ax25_send_frame(skb, 256,
- (const ax25_address *)dev->dev_addr,
- &nr_neigh->callsign,
- nr_neigh->digipeat, nr_neigh->dev);
- if (ax25s)
- ax25_cb_put(ax25s);
-
- dev_put(dev);
- ret = (nr_neigh->ax25 != NULL);
- nr_node_unlock(nr_node);
- nr_node_put(nr_node);
-
- if (ret)
- kfree_skb(oskb);
-
- return ret;
-}
-
-#ifdef CONFIG_PROC_FS
-
-static void *nr_node_start(struct seq_file *seq, loff_t *pos)
- __acquires(&nr_node_list_lock)
-{
- spin_lock_bh(&nr_node_list_lock);
- return seq_hlist_start_head(&nr_node_list, *pos);
-}
-
-static void *nr_node_next(struct seq_file *seq, void *v, loff_t *pos)
-{
- return seq_hlist_next(v, &nr_node_list, pos);
-}
-
-static void nr_node_stop(struct seq_file *seq, void *v)
- __releases(&nr_node_list_lock)
-{
- spin_unlock_bh(&nr_node_list_lock);
-}
-
-static int nr_node_show(struct seq_file *seq, void *v)
-{
- char buf[11];
- int i;
-
- if (v == SEQ_START_TOKEN)
- seq_puts(seq,
- "callsign mnemonic w n qual obs neigh qual obs neigh qual obs neigh\n");
- else {
- struct nr_node *nr_node = hlist_entry(v, struct nr_node,
- node_node);
-
- nr_node_lock(nr_node);
- seq_printf(seq, "%-9s %-7s %d %d",
- ax2asc(buf, &nr_node->callsign),
- (nr_node->mnemonic[0] == '\0') ? "*" : nr_node->mnemonic,
- nr_node->which + 1,
- nr_node->count);
-
- for (i = 0; i < nr_node->count; i++) {
- seq_printf(seq, " %3d %d %05d",
- nr_node->routes[i].quality,
- nr_node->routes[i].obs_count,
- nr_node->routes[i].neighbour->number);
- }
- nr_node_unlock(nr_node);
-
- seq_puts(seq, "\n");
- }
- return 0;
-}
-
-const struct seq_operations nr_node_seqops = {
- .start = nr_node_start,
- .next = nr_node_next,
- .stop = nr_node_stop,
- .show = nr_node_show,
-};
-
-static void *nr_neigh_start(struct seq_file *seq, loff_t *pos)
- __acquires(&nr_neigh_list_lock)
-{
- spin_lock_bh(&nr_neigh_list_lock);
- return seq_hlist_start_head(&nr_neigh_list, *pos);
-}
-
-static void *nr_neigh_next(struct seq_file *seq, void *v, loff_t *pos)
-{
- return seq_hlist_next(v, &nr_neigh_list, pos);
-}
-
-static void nr_neigh_stop(struct seq_file *seq, void *v)
- __releases(&nr_neigh_list_lock)
-{
- spin_unlock_bh(&nr_neigh_list_lock);
-}
-
-static int nr_neigh_show(struct seq_file *seq, void *v)
-{
- char buf[11];
- int i;
-
- if (v == SEQ_START_TOKEN)
- seq_puts(seq, "addr callsign dev qual lock count failed digipeaters\n");
- else {
- struct nr_neigh *nr_neigh;
-
- nr_neigh = hlist_entry(v, struct nr_neigh, neigh_node);
- seq_printf(seq, "%05d %-9s %-4s %3d %d %3d %3d",
- nr_neigh->number,
- ax2asc(buf, &nr_neigh->callsign),
- nr_neigh->dev ? nr_neigh->dev->name : "???",
- nr_neigh->quality,
- nr_neigh->locked,
- nr_neigh->count,
- nr_neigh->failed);
-
- if (nr_neigh->digipeat != NULL) {
- for (i = 0; i < nr_neigh->digipeat->ndigi; i++)
- seq_printf(seq, " %s",
- ax2asc(buf, &nr_neigh->digipeat->calls[i]));
- }
-
- seq_puts(seq, "\n");
- }
- return 0;
-}
-
-const struct seq_operations nr_neigh_seqops = {
- .start = nr_neigh_start,
- .next = nr_neigh_next,
- .stop = nr_neigh_stop,
- .show = nr_neigh_show,
-};
-#endif
-
-/*
- * Free all memory associated with the nodes and routes lists.
- */
-void nr_rt_free(void)
-{
- struct nr_neigh *s = NULL;
- struct nr_node *t = NULL;
- struct hlist_node *nodet;
-
- spin_lock_bh(&nr_neigh_list_lock);
- spin_lock_bh(&nr_node_list_lock);
- nr_node_for_each_safe(t, nodet, &nr_node_list) {
- nr_node_lock(t);
- nr_remove_node_locked(t);
- nr_node_unlock(t);
- }
- nr_neigh_for_each_safe(s, nodet, &nr_neigh_list) {
- while(s->count) {
- s->count--;
- nr_neigh_put(s);
- }
- nr_remove_neigh_locked(s);
- }
- spin_unlock_bh(&nr_node_list_lock);
- spin_unlock_bh(&nr_neigh_list_lock);
-}
+++ /dev/null
-// SPDX-License-Identifier: GPL-2.0-or-later
-/*
- *
- * Copyright Jonathan Naylor G4KLX (g4klx@g4klx.demon.co.uk)
- */
-#include <linux/errno.h>
-#include <linux/types.h>
-#include <linux/socket.h>
-#include <linux/in.h>
-#include <linux/kernel.h>
-#include <linux/timer.h>
-#include <linux/string.h>
-#include <linux/sockios.h>
-#include <linux/net.h>
-#include <linux/slab.h>
-#include <net/ax25.h>
-#include <linux/inet.h>
-#include <linux/netdevice.h>
-#include <linux/skbuff.h>
-#include <net/sock.h>
-#include <net/tcp_states.h>
-#include <linux/uaccess.h>
-#include <linux/fcntl.h>
-#include <linux/mm.h>
-#include <linux/interrupt.h>
-#include <net/netrom.h>
-
-/*
- * This routine purges all of the queues of frames.
- */
-void nr_clear_queues(struct sock *sk)
-{
- struct nr_sock *nr = nr_sk(sk);
-
- skb_queue_purge(&sk->sk_write_queue);
- skb_queue_purge(&nr->ack_queue);
- skb_queue_purge(&nr->reseq_queue);
- skb_queue_purge(&nr->frag_queue);
-}
-
-/*
- * This routine purges the input queue of those frames that have been
- * acknowledged. This replaces the boxes labelled "V(a) <- N(r)" on the
- * SDL diagram.
- */
-void nr_frames_acked(struct sock *sk, unsigned short nr)
-{
- struct nr_sock *nrom = nr_sk(sk);
- struct sk_buff *skb;
-
- /*
- * Remove all the ack-ed frames from the ack queue.
- */
- if (nrom->va != nr) {
- while (skb_peek(&nrom->ack_queue) != NULL && nrom->va != nr) {
- skb = skb_dequeue(&nrom->ack_queue);
- kfree_skb(skb);
- nrom->va = (nrom->va + 1) % NR_MODULUS;
- }
- }
-}
-
-/*
- * Requeue all the un-ack-ed frames on the output queue to be picked
- * up by nr_kick called from the timer. This arrangement handles the
- * possibility of an empty output queue.
- */
-void nr_requeue_frames(struct sock *sk)
-{
- struct sk_buff *skb, *skb_prev = NULL;
-
- while ((skb = skb_dequeue(&nr_sk(sk)->ack_queue)) != NULL) {
- if (skb_prev == NULL)
- skb_queue_head(&sk->sk_write_queue, skb);
- else
- skb_append(skb_prev, skb, &sk->sk_write_queue);
- skb_prev = skb;
- }
-}
-
-/*
- * Validate that the value of nr is between va and vs. Return true or
- * false for testing.
- */
-int nr_validate_nr(struct sock *sk, unsigned short nr)
-{
- struct nr_sock *nrom = nr_sk(sk);
- unsigned short vc = nrom->va;
-
- while (vc != nrom->vs) {
- if (nr == vc) return 1;
- vc = (vc + 1) % NR_MODULUS;
- }
-
- return nr == nrom->vs;
-}
-
-/*
- * Check that ns is within the receive window.
- */
-int nr_in_rx_window(struct sock *sk, unsigned short ns)
-{
- struct nr_sock *nr = nr_sk(sk);
- unsigned short vc = nr->vr;
- unsigned short vt = (nr->vl + nr->window) % NR_MODULUS;
-
- while (vc != vt) {
- if (ns == vc) return 1;
- vc = (vc + 1) % NR_MODULUS;
- }
-
- return 0;
-}
-
-/*
- * This routine is called when the HDLC layer internally generates a
- * control frame.
- */
-void nr_write_internal(struct sock *sk, int frametype)
-{
- struct nr_sock *nr = nr_sk(sk);
- struct sk_buff *skb;
- unsigned char *dptr;
- int len, timeout;
-
- len = NR_TRANSPORT_LEN;
-
- switch (frametype & 0x0F) {
- case NR_CONNREQ:
- len += 17;
- break;
- case NR_CONNACK:
- len += (nr->bpqext) ? 2 : 1;
- break;
- case NR_DISCREQ:
- case NR_DISCACK:
- case NR_INFOACK:
- break;
- default:
- printk(KERN_ERR "NET/ROM: nr_write_internal - invalid frame type %d\n", frametype);
- return;
- }
-
- skb = alloc_skb(NR_NETWORK_LEN + len, GFP_ATOMIC);
- if (!skb)
- return;
-
- /*
- * Space for AX.25 and NET/ROM network header
- */
- skb_reserve(skb, NR_NETWORK_LEN);
-
- dptr = skb_put(skb, len);
-
- switch (frametype & 0x0F) {
- case NR_CONNREQ:
- timeout = nr->t1 / HZ;
- *dptr++ = nr->my_index;
- *dptr++ = nr->my_id;
- *dptr++ = 0;
- *dptr++ = 0;
- *dptr++ = frametype;
- *dptr++ = nr->window;
- memcpy(dptr, &nr->user_addr, AX25_ADDR_LEN);
- dptr[6] &= ~AX25_CBIT;
- dptr[6] &= ~AX25_EBIT;
- dptr[6] |= AX25_SSSID_SPARE;
- dptr += AX25_ADDR_LEN;
- memcpy(dptr, &nr->source_addr, AX25_ADDR_LEN);
- dptr[6] &= ~AX25_CBIT;
- dptr[6] &= ~AX25_EBIT;
- dptr[6] |= AX25_SSSID_SPARE;
- dptr += AX25_ADDR_LEN;
- *dptr++ = timeout % 256;
- *dptr++ = timeout / 256;
- break;
-
- case NR_CONNACK:
- *dptr++ = nr->your_index;
- *dptr++ = nr->your_id;
- *dptr++ = nr->my_index;
- *dptr++ = nr->my_id;
- *dptr++ = frametype;
- *dptr++ = nr->window;
- if (nr->bpqext)
- *dptr++ = READ_ONCE(sysctl_netrom_network_ttl_initialiser);
- break;
-
- case NR_DISCREQ:
- case NR_DISCACK:
- *dptr++ = nr->your_index;
- *dptr++ = nr->your_id;
- *dptr++ = 0;
- *dptr++ = 0;
- *dptr++ = frametype;
- break;
-
- case NR_INFOACK:
- *dptr++ = nr->your_index;
- *dptr++ = nr->your_id;
- *dptr++ = 0;
- *dptr++ = nr->vr;
- *dptr++ = frametype;
- break;
- }
-
- nr_transmit_buffer(sk, skb);
-}
-
-/*
- * This routine is called to send an error reply.
- */
-void __nr_transmit_reply(struct sk_buff *skb, int mine, unsigned char cmdflags)
-{
- struct sk_buff *skbn;
- unsigned char *dptr;
- int len;
-
- len = NR_NETWORK_LEN + NR_TRANSPORT_LEN + 1;
-
- if ((skbn = alloc_skb(len, GFP_ATOMIC)) == NULL)
- return;
-
- skb_reserve(skbn, 0);
-
- dptr = skb_put(skbn, NR_NETWORK_LEN + NR_TRANSPORT_LEN);
-
- skb_copy_from_linear_data_offset(skb, 7, dptr, AX25_ADDR_LEN);
- dptr[6] &= ~AX25_CBIT;
- dptr[6] &= ~AX25_EBIT;
- dptr[6] |= AX25_SSSID_SPARE;
- dptr += AX25_ADDR_LEN;
-
- skb_copy_from_linear_data(skb, dptr, AX25_ADDR_LEN);
- dptr[6] &= ~AX25_CBIT;
- dptr[6] |= AX25_EBIT;
- dptr[6] |= AX25_SSSID_SPARE;
- dptr += AX25_ADDR_LEN;
-
- *dptr++ = READ_ONCE(sysctl_netrom_network_ttl_initialiser);
-
- if (mine) {
- *dptr++ = 0;
- *dptr++ = 0;
- *dptr++ = skb->data[15];
- *dptr++ = skb->data[16];
- } else {
- *dptr++ = skb->data[15];
- *dptr++ = skb->data[16];
- *dptr++ = 0;
- *dptr++ = 0;
- }
-
- *dptr++ = cmdflags;
- *dptr++ = 0;
-
- if (!nr_route_frame(skbn, NULL))
- kfree_skb(skbn);
-}
-
-void nr_disconnect(struct sock *sk, int reason)
-{
- nr_stop_t1timer(sk);
- nr_stop_t2timer(sk);
- nr_stop_t4timer(sk);
- nr_stop_idletimer(sk);
-
- nr_clear_queues(sk);
-
- nr_sk(sk)->state = NR_STATE_0;
-
- sk->sk_state = TCP_CLOSE;
- sk->sk_err = reason;
- sk->sk_shutdown |= SEND_SHUTDOWN;
-
- if (!sock_flag(sk, SOCK_DEAD)) {
- sk->sk_state_change(sk);
- sock_set_flag(sk, SOCK_DEAD);
- }
-}
+++ /dev/null
-// SPDX-License-Identifier: GPL-2.0-or-later
-/*
- *
- * Copyright (C) Jonathan Naylor G4KLX (g4klx@g4klx.demon.co.uk)
- * Copyright (C) 2002 Ralf Baechle DO1GRB (ralf@gnu.org)
- */
-#include <linux/errno.h>
-#include <linux/types.h>
-#include <linux/socket.h>
-#include <linux/in.h>
-#include <linux/kernel.h>
-#include <linux/jiffies.h>
-#include <linux/timer.h>
-#include <linux/string.h>
-#include <linux/sockios.h>
-#include <linux/net.h>
-#include <net/ax25.h>
-#include <linux/inet.h>
-#include <linux/netdevice.h>
-#include <linux/skbuff.h>
-#include <net/sock.h>
-#include <net/tcp_states.h>
-#include <linux/uaccess.h>
-#include <linux/fcntl.h>
-#include <linux/mm.h>
-#include <linux/interrupt.h>
-#include <net/netrom.h>
-
-static void nr_heartbeat_expiry(struct timer_list *);
-static void nr_t1timer_expiry(struct timer_list *);
-static void nr_t2timer_expiry(struct timer_list *);
-static void nr_t4timer_expiry(struct timer_list *);
-static void nr_idletimer_expiry(struct timer_list *);
-
-void nr_init_timers(struct sock *sk)
-{
- struct nr_sock *nr = nr_sk(sk);
-
- timer_setup(&nr->t1timer, nr_t1timer_expiry, 0);
- timer_setup(&nr->t2timer, nr_t2timer_expiry, 0);
- timer_setup(&nr->t4timer, nr_t4timer_expiry, 0);
- timer_setup(&nr->idletimer, nr_idletimer_expiry, 0);
-
- /* initialized by sock_init_data */
- sk->sk_timer.function = nr_heartbeat_expiry;
-}
-
-void nr_start_t1timer(struct sock *sk)
-{
- struct nr_sock *nr = nr_sk(sk);
-
- sk_reset_timer(sk, &nr->t1timer, jiffies + nr->t1);
-}
-
-void nr_start_t2timer(struct sock *sk)
-{
- struct nr_sock *nr = nr_sk(sk);
-
- sk_reset_timer(sk, &nr->t2timer, jiffies + nr->t2);
-}
-
-void nr_start_t4timer(struct sock *sk)
-{
- struct nr_sock *nr = nr_sk(sk);
-
- sk_reset_timer(sk, &nr->t4timer, jiffies + nr->t4);
-}
-
-void nr_start_idletimer(struct sock *sk)
-{
- struct nr_sock *nr = nr_sk(sk);
-
- if (nr->idle > 0)
- sk_reset_timer(sk, &nr->idletimer, jiffies + nr->idle);
-}
-
-void nr_start_heartbeat(struct sock *sk)
-{
- sk_reset_timer(sk, &sk->sk_timer, jiffies + 5 * HZ);
-}
-
-void nr_stop_t1timer(struct sock *sk)
-{
- sk_stop_timer(sk, &nr_sk(sk)->t1timer);
-}
-
-void nr_stop_t2timer(struct sock *sk)
-{
- sk_stop_timer(sk, &nr_sk(sk)->t2timer);
-}
-
-void nr_stop_t4timer(struct sock *sk)
-{
- sk_stop_timer(sk, &nr_sk(sk)->t4timer);
-}
-
-void nr_stop_idletimer(struct sock *sk)
-{
- sk_stop_timer(sk, &nr_sk(sk)->idletimer);
-}
-
-void nr_stop_heartbeat(struct sock *sk)
-{
- sk_stop_timer(sk, &sk->sk_timer);
-}
-
-int nr_t1timer_running(struct sock *sk)
-{
- return timer_pending(&nr_sk(sk)->t1timer);
-}
-
-static void nr_heartbeat_expiry(struct timer_list *t)
-{
- struct sock *sk = timer_container_of(sk, t, sk_timer);
- struct nr_sock *nr = nr_sk(sk);
-
- bh_lock_sock(sk);
- switch (nr->state) {
- case NR_STATE_0:
- /* Magic here: If we listen() and a new link dies before it
- is accepted() it isn't 'dead' so doesn't get removed. */
- if (sock_flag(sk, SOCK_DESTROY) ||
- (sk->sk_state == TCP_LISTEN && sock_flag(sk, SOCK_DEAD))) {
- if (sk->sk_state == TCP_LISTEN)
- sock_hold(sk);
- bh_unlock_sock(sk);
- nr_destroy_socket(sk);
- goto out;
- }
- break;
-
- case NR_STATE_3:
- /*
- * Check for the state of the receive buffer.
- */
- if (atomic_read(&sk->sk_rmem_alloc) < (sk->sk_rcvbuf / 2) &&
- (nr->condition & NR_COND_OWN_RX_BUSY)) {
- nr->condition &= ~NR_COND_OWN_RX_BUSY;
- nr->condition &= ~NR_COND_ACK_PENDING;
- nr->vl = nr->vr;
- nr_write_internal(sk, NR_INFOACK);
- break;
- }
- break;
- }
-
- nr_start_heartbeat(sk);
- bh_unlock_sock(sk);
-out:
- sock_put(sk);
-}
-
-static void nr_t2timer_expiry(struct timer_list *t)
-{
- struct nr_sock *nr = timer_container_of(nr, t, t2timer);
- struct sock *sk = &nr->sock;
-
- bh_lock_sock(sk);
- if (nr->condition & NR_COND_ACK_PENDING) {
- nr->condition &= ~NR_COND_ACK_PENDING;
- nr_enquiry_response(sk);
- }
- bh_unlock_sock(sk);
- sock_put(sk);
-}
-
-static void nr_t4timer_expiry(struct timer_list *t)
-{
- struct nr_sock *nr = timer_container_of(nr, t, t4timer);
- struct sock *sk = &nr->sock;
-
- bh_lock_sock(sk);
- nr_sk(sk)->condition &= ~NR_COND_PEER_RX_BUSY;
- bh_unlock_sock(sk);
- sock_put(sk);
-}
-
-static void nr_idletimer_expiry(struct timer_list *t)
-{
- struct nr_sock *nr = timer_container_of(nr, t, idletimer);
- struct sock *sk = &nr->sock;
-
- bh_lock_sock(sk);
-
- nr_clear_queues(sk);
-
- nr->n2count = 0;
- nr_write_internal(sk, NR_DISCREQ);
- nr->state = NR_STATE_2;
-
- nr_start_t1timer(sk);
- nr_stop_t2timer(sk);
- nr_stop_t4timer(sk);
-
- sk->sk_state = TCP_CLOSE;
- sk->sk_err = 0;
- sk->sk_shutdown |= SEND_SHUTDOWN;
-
- if (!sock_flag(sk, SOCK_DEAD)) {
- sk->sk_state_change(sk);
- sock_set_flag(sk, SOCK_DEAD);
- }
- bh_unlock_sock(sk);
- sock_put(sk);
-}
-
-static void nr_t1timer_expiry(struct timer_list *t)
-{
- struct nr_sock *nr = timer_container_of(nr, t, t1timer);
- struct sock *sk = &nr->sock;
-
- bh_lock_sock(sk);
- switch (nr->state) {
- case NR_STATE_1:
- if (nr->n2count == nr->n2) {
- nr_disconnect(sk, ETIMEDOUT);
- goto out;
- } else {
- nr->n2count++;
- nr_write_internal(sk, NR_CONNREQ);
- }
- break;
-
- case NR_STATE_2:
- if (nr->n2count == nr->n2) {
- nr_disconnect(sk, ETIMEDOUT);
- goto out;
- } else {
- nr->n2count++;
- nr_write_internal(sk, NR_DISCREQ);
- }
- break;
-
- case NR_STATE_3:
- if (nr->n2count == nr->n2) {
- nr_disconnect(sk, ETIMEDOUT);
- goto out;
- } else {
- nr->n2count++;
- nr_requeue_frames(sk);
- }
- break;
- }
-
- nr_start_t1timer(sk);
-out:
- bh_unlock_sock(sk);
- sock_put(sk);
-}
+++ /dev/null
-// SPDX-License-Identifier: GPL-2.0-or-later
-/*
- *
- * Copyright (C) 1996 Mike Shaver (shaver@zeroknowledge.com)
- */
-#include <linux/mm.h>
-#include <linux/sysctl.h>
-#include <linux/init.h>
-#include <net/ax25.h>
-#include <net/netrom.h>
-
-/*
- * Values taken from NET/ROM documentation.
- */
-static int min_quality[] = {0}, max_quality[] = {255};
-static int min_obs[] = {0}, max_obs[] = {255};
-static int min_ttl[] = {0}, max_ttl[] = {255};
-static int min_t1[] = {5 * HZ};
-static int max_t1[] = {600 * HZ};
-static int min_n2[] = {2}, max_n2[] = {127};
-static int min_t2[] = {1 * HZ};
-static int max_t2[] = {60 * HZ};
-static int min_t4[] = {1 * HZ};
-static int max_t4[] = {1000 * HZ};
-static int min_window[] = {1}, max_window[] = {127};
-static int min_idle[] = {0 * HZ};
-static int max_idle[] = {65535 * HZ};
-static int min_route[] = {0}, max_route[] = {1};
-static int min_fails[] = {1}, max_fails[] = {10};
-static int min_reset[] = {0}, max_reset[] = {1};
-
-static struct ctl_table_header *nr_table_header;
-
-static struct ctl_table nr_table[] = {
- {
- .procname = "default_path_quality",
- .data = &sysctl_netrom_default_path_quality,
- .maxlen = sizeof(int),
- .mode = 0644,
- .proc_handler = proc_dointvec_minmax,
- .extra1 = &min_quality,
- .extra2 = &max_quality
- },
- {
- .procname = "obsolescence_count_initialiser",
- .data = &sysctl_netrom_obsolescence_count_initialiser,
- .maxlen = sizeof(int),
- .mode = 0644,
- .proc_handler = proc_dointvec_minmax,
- .extra1 = &min_obs,
- .extra2 = &max_obs
- },
- {
- .procname = "network_ttl_initialiser",
- .data = &sysctl_netrom_network_ttl_initialiser,
- .maxlen = sizeof(int),
- .mode = 0644,
- .proc_handler = proc_dointvec_minmax,
- .extra1 = &min_ttl,
- .extra2 = &max_ttl
- },
- {
- .procname = "transport_timeout",
- .data = &sysctl_netrom_transport_timeout,
- .maxlen = sizeof(int),
- .mode = 0644,
- .proc_handler = proc_dointvec_minmax,
- .extra1 = &min_t1,
- .extra2 = &max_t1
- },
- {
- .procname = "transport_maximum_tries",
- .data = &sysctl_netrom_transport_maximum_tries,
- .maxlen = sizeof(int),
- .mode = 0644,
- .proc_handler = proc_dointvec_minmax,
- .extra1 = &min_n2,
- .extra2 = &max_n2
- },
- {
- .procname = "transport_acknowledge_delay",
- .data = &sysctl_netrom_transport_acknowledge_delay,
- .maxlen = sizeof(int),
- .mode = 0644,
- .proc_handler = proc_dointvec_minmax,
- .extra1 = &min_t2,
- .extra2 = &max_t2
- },
- {
- .procname = "transport_busy_delay",
- .data = &sysctl_netrom_transport_busy_delay,
- .maxlen = sizeof(int),
- .mode = 0644,
- .proc_handler = proc_dointvec_minmax,
- .extra1 = &min_t4,
- .extra2 = &max_t4
- },
- {
- .procname = "transport_requested_window_size",
- .data = &sysctl_netrom_transport_requested_window_size,
- .maxlen = sizeof(int),
- .mode = 0644,
- .proc_handler = proc_dointvec_minmax,
- .extra1 = &min_window,
- .extra2 = &max_window
- },
- {
- .procname = "transport_no_activity_timeout",
- .data = &sysctl_netrom_transport_no_activity_timeout,
- .maxlen = sizeof(int),
- .mode = 0644,
- .proc_handler = proc_dointvec_minmax,
- .extra1 = &min_idle,
- .extra2 = &max_idle
- },
- {
- .procname = "routing_control",
- .data = &sysctl_netrom_routing_control,
- .maxlen = sizeof(int),
- .mode = 0644,
- .proc_handler = proc_dointvec_minmax,
- .extra1 = &min_route,
- .extra2 = &max_route
- },
- {
- .procname = "link_fails_count",
- .data = &sysctl_netrom_link_fails_count,
- .maxlen = sizeof(int),
- .mode = 0644,
- .proc_handler = proc_dointvec_minmax,
- .extra1 = &min_fails,
- .extra2 = &max_fails
- },
- {
- .procname = "reset",
- .data = &sysctl_netrom_reset_circuit,
- .maxlen = sizeof(int),
- .mode = 0644,
- .proc_handler = proc_dointvec_minmax,
- .extra1 = &min_reset,
- .extra2 = &max_reset
- },
-};
-
-int __init nr_register_sysctl(void)
-{
- nr_table_header = register_net_sysctl(&init_net, "net/netrom", nr_table);
- if (!nr_table_header)
- return -ENOMEM;
- return 0;
-}
-
-void nr_unregister_sysctl(void)
-{
- unregister_net_sysctl_table(nr_table_header);
-}
+++ /dev/null
-# SPDX-License-Identifier: GPL-2.0-only
-#
-# Makefile for the Linux Rose (X.25 PLP) layer.
-#
-
-obj-$(CONFIG_ROSE) += rose.o
-
-rose-y := af_rose.o rose_dev.o rose_in.o rose_link.o rose_loopback.o \
- rose_out.o rose_route.o rose_subr.o rose_timer.o
-rose-$(CONFIG_SYSCTL) += sysctl_net_rose.o
+++ /dev/null
-// SPDX-License-Identifier: GPL-2.0-or-later
-/*
- *
- * Copyright (C) Jonathan Naylor G4KLX (g4klx@g4klx.demon.co.uk)
- * Copyright (C) Alan Cox GW4PTS (alan@lxorguk.ukuu.org.uk)
- * Copyright (C) Terry Dawson VK2KTJ (terry@animats.net)
- * Copyright (C) Tomi Manninen OH2BNS (oh2bns@sral.fi)
- */
-
-#include <linux/capability.h>
-#include <linux/module.h>
-#include <linux/moduleparam.h>
-#include <linux/init.h>
-#include <linux/errno.h>
-#include <linux/types.h>
-#include <linux/socket.h>
-#include <linux/in.h>
-#include <linux/slab.h>
-#include <linux/kernel.h>
-#include <linux/sched/signal.h>
-#include <linux/spinlock.h>
-#include <linux/timer.h>
-#include <linux/string.h>
-#include <linux/sockios.h>
-#include <linux/net.h>
-#include <linux/stat.h>
-#include <net/net_namespace.h>
-#include <net/ax25.h>
-#include <linux/inet.h>
-#include <linux/netdevice.h>
-#include <linux/if_arp.h>
-#include <linux/skbuff.h>
-#include <net/sock.h>
-#include <linux/uaccess.h>
-#include <linux/fcntl.h>
-#include <linux/termios.h>
-#include <linux/mm.h>
-#include <linux/interrupt.h>
-#include <linux/notifier.h>
-#include <net/rose.h>
-#include <linux/proc_fs.h>
-#include <linux/seq_file.h>
-#include <net/tcp_states.h>
-#include <net/ip.h>
-#include <net/arp.h>
-
-static int rose_ndevs = 10;
-
-int sysctl_rose_restart_request_timeout = ROSE_DEFAULT_T0;
-int sysctl_rose_call_request_timeout = ROSE_DEFAULT_T1;
-int sysctl_rose_reset_request_timeout = ROSE_DEFAULT_T2;
-int sysctl_rose_clear_request_timeout = ROSE_DEFAULT_T3;
-int sysctl_rose_no_activity_timeout = ROSE_DEFAULT_IDLE;
-int sysctl_rose_ack_hold_back_timeout = ROSE_DEFAULT_HB;
-int sysctl_rose_routing_control = ROSE_DEFAULT_ROUTING;
-int sysctl_rose_link_fail_timeout = ROSE_DEFAULT_FAIL_TIMEOUT;
-int sysctl_rose_maximum_vcs = ROSE_DEFAULT_MAXVC;
-int sysctl_rose_window_size = ROSE_DEFAULT_WINDOW_SIZE;
-
-static HLIST_HEAD(rose_list);
-static DEFINE_SPINLOCK(rose_list_lock);
-
-static const struct proto_ops rose_proto_ops;
-
-ax25_address rose_callsign;
-
-/*
- * ROSE network devices are virtual network devices encapsulating ROSE
- * frames into AX.25 which will be sent through an AX.25 device, so form a
- * special "super class" of normal net devices; split their locks off into a
- * separate class since they always nest.
- */
-static struct lock_class_key rose_netdev_xmit_lock_key;
-static struct lock_class_key rose_netdev_addr_lock_key;
-
-static void rose_set_lockdep_one(struct net_device *dev,
- struct netdev_queue *txq,
- void *_unused)
-{
- lockdep_set_class(&txq->_xmit_lock, &rose_netdev_xmit_lock_key);
-}
-
-static void rose_set_lockdep_key(struct net_device *dev)
-{
- lockdep_set_class(&dev->addr_list_lock, &rose_netdev_addr_lock_key);
- netdev_for_each_tx_queue(dev, rose_set_lockdep_one, NULL);
-}
-
-/*
- * Convert a ROSE address into text.
- */
-char *rose2asc(char *buf, const rose_address *addr)
-{
- if (addr->rose_addr[0] == 0x00 && addr->rose_addr[1] == 0x00 &&
- addr->rose_addr[2] == 0x00 && addr->rose_addr[3] == 0x00 &&
- addr->rose_addr[4] == 0x00) {
- strcpy(buf, "*");
- } else {
- sprintf(buf, "%02X%02X%02X%02X%02X", addr->rose_addr[0] & 0xFF,
- addr->rose_addr[1] & 0xFF,
- addr->rose_addr[2] & 0xFF,
- addr->rose_addr[3] & 0xFF,
- addr->rose_addr[4] & 0xFF);
- }
-
- return buf;
-}
-
-/*
- * Compare two ROSE addresses, 0 == equal.
- */
-int rosecmp(const rose_address *addr1, const rose_address *addr2)
-{
- int i;
-
- for (i = 0; i < 5; i++)
- if (addr1->rose_addr[i] != addr2->rose_addr[i])
- return 1;
-
- return 0;
-}
-
-/*
- * Compare two ROSE addresses for only mask digits, 0 == equal.
- */
-int rosecmpm(const rose_address *addr1, const rose_address *addr2,
- unsigned short mask)
-{
- unsigned int i, j;
-
- if (mask > 10)
- return 1;
-
- for (i = 0; i < mask; i++) {
- j = i / 2;
-
- if ((i % 2) != 0) {
- if ((addr1->rose_addr[j] & 0x0F) != (addr2->rose_addr[j] & 0x0F))
- return 1;
- } else {
- if ((addr1->rose_addr[j] & 0xF0) != (addr2->rose_addr[j] & 0xF0))
- return 1;
- }
- }
-
- return 0;
-}
-
-/*
- * Socket removal during an interrupt is now safe.
- */
-static void rose_remove_socket(struct sock *sk)
-{
- spin_lock_bh(&rose_list_lock);
- sk_del_node_init(sk);
- spin_unlock_bh(&rose_list_lock);
-}
-
-/*
- * Kill all bound sockets on a broken link layer connection to a
- * particular neighbour.
- */
-void rose_kill_by_neigh(struct rose_neigh *neigh)
-{
- struct sock *s;
-
- spin_lock_bh(&rose_list_lock);
- sk_for_each(s, &rose_list) {
- struct rose_sock *rose = rose_sk(s);
-
- if (rose->neighbour == neigh) {
- rose_disconnect(s, ENETUNREACH, ROSE_OUT_OF_ORDER, 0);
- rose_neigh_put(rose->neighbour);
- rose->neighbour = NULL;
- }
- }
- spin_unlock_bh(&rose_list_lock);
-}
-
-/*
- * Kill all bound sockets on a dropped device.
- */
-static void rose_kill_by_device(struct net_device *dev)
-{
- struct sock *sk, *array[16];
- struct rose_sock *rose;
- bool rescan;
- int i, cnt;
-
-start:
- rescan = false;
- cnt = 0;
- spin_lock_bh(&rose_list_lock);
- sk_for_each(sk, &rose_list) {
- rose = rose_sk(sk);
- if (rose->device == dev) {
- if (cnt == ARRAY_SIZE(array)) {
- rescan = true;
- break;
- }
- sock_hold(sk);
- array[cnt++] = sk;
- }
- }
- spin_unlock_bh(&rose_list_lock);
-
- for (i = 0; i < cnt; i++) {
- sk = array[i];
- rose = rose_sk(sk);
- lock_sock(sk);
- spin_lock_bh(&rose_list_lock);
- if (rose->device == dev) {
- rose_disconnect(sk, ENETUNREACH, ROSE_OUT_OF_ORDER, 0);
- if (rose->neighbour)
- rose_neigh_put(rose->neighbour);
- netdev_put(rose->device, &rose->dev_tracker);
- rose->device = NULL;
- }
- spin_unlock_bh(&rose_list_lock);
- release_sock(sk);
- sock_put(sk);
- cond_resched();
- }
- if (rescan)
- goto start;
-}
-
-/*
- * Handle device status changes.
- */
-static int rose_device_event(struct notifier_block *this,
- unsigned long event, void *ptr)
-{
- struct net_device *dev = netdev_notifier_info_to_dev(ptr);
-
- if (!net_eq(dev_net(dev), &init_net))
- return NOTIFY_DONE;
-
- if (event != NETDEV_DOWN)
- return NOTIFY_DONE;
-
- switch (dev->type) {
- case ARPHRD_ROSE:
- rose_kill_by_device(dev);
- break;
- case ARPHRD_AX25:
- rose_link_device_down(dev);
- rose_rt_device_down(dev);
- break;
- }
-
- return NOTIFY_DONE;
-}
-
-/*
- * Add a socket to the bound sockets list.
- */
-static void rose_insert_socket(struct sock *sk)
-{
-
- spin_lock_bh(&rose_list_lock);
- sk_add_node(sk, &rose_list);
- spin_unlock_bh(&rose_list_lock);
-}
-
-/*
- * Find a socket that wants to accept the Call Request we just
- * received.
- */
-static struct sock *rose_find_listener(rose_address *addr, ax25_address *call)
-{
- struct sock *s;
-
- spin_lock_bh(&rose_list_lock);
- sk_for_each(s, &rose_list) {
- struct rose_sock *rose = rose_sk(s);
-
- if (!rosecmp(&rose->source_addr, addr) &&
- !ax25cmp(&rose->source_call, call) &&
- !rose->source_ndigis && s->sk_state == TCP_LISTEN)
- goto found;
- }
-
- sk_for_each(s, &rose_list) {
- struct rose_sock *rose = rose_sk(s);
-
- if (!rosecmp(&rose->source_addr, addr) &&
- !ax25cmp(&rose->source_call, &null_ax25_address) &&
- s->sk_state == TCP_LISTEN)
- goto found;
- }
- s = NULL;
-found:
- spin_unlock_bh(&rose_list_lock);
- return s;
-}
-
-/*
- * Find a connected ROSE socket given my LCI and device.
- */
-struct sock *rose_find_socket(unsigned int lci, struct rose_neigh *neigh)
-{
- struct sock *s;
-
- spin_lock_bh(&rose_list_lock);
- sk_for_each(s, &rose_list) {
- struct rose_sock *rose = rose_sk(s);
-
- if (rose->lci == lci && rose->neighbour == neigh)
- goto found;
- }
- s = NULL;
-found:
- spin_unlock_bh(&rose_list_lock);
- return s;
-}
-
-/*
- * Find a unique LCI for a given device.
- */
-unsigned int rose_new_lci(struct rose_neigh *neigh)
-{
- int lci;
-
- if (neigh->dce_mode) {
- for (lci = 1; lci <= sysctl_rose_maximum_vcs; lci++)
- if (rose_find_socket(lci, neigh) == NULL && rose_route_free_lci(lci, neigh) == NULL)
- return lci;
- } else {
- for (lci = sysctl_rose_maximum_vcs; lci > 0; lci--)
- if (rose_find_socket(lci, neigh) == NULL && rose_route_free_lci(lci, neigh) == NULL)
- return lci;
- }
-
- return 0;
-}
-
-/*
- * Deferred destroy.
- */
-void rose_destroy_socket(struct sock *);
-
-/*
- * Handler for deferred kills.
- */
-static void rose_destroy_timer(struct timer_list *t)
-{
- struct sock *sk = timer_container_of(sk, t, sk_timer);
-
- rose_destroy_socket(sk);
-}
-
-/*
- * This is called from user mode and the timers. Thus it protects itself
- * against interrupt users but doesn't worry about being called during
- * work. Once it is removed from the queue no interrupt or bottom half
- * will touch it and we are (fairly 8-) ) safe.
- */
-void rose_destroy_socket(struct sock *sk)
-{
- struct sk_buff *skb;
-
- rose_remove_socket(sk);
- rose_stop_heartbeat(sk);
- rose_stop_idletimer(sk);
- rose_stop_timer(sk);
-
- rose_clear_queues(sk); /* Flush the queues */
-
- while ((skb = skb_dequeue(&sk->sk_receive_queue)) != NULL) {
- if (skb->sk != sk) { /* A pending connection */
- /* Queue the unaccepted socket for death */
- sock_set_flag(skb->sk, SOCK_DEAD);
- rose_start_heartbeat(skb->sk);
- rose_sk(skb->sk)->state = ROSE_STATE_0;
- }
-
- kfree_skb(skb);
- }
-
- if (sk_has_allocations(sk)) {
- /* Defer: outstanding buffers */
- timer_setup(&sk->sk_timer, rose_destroy_timer, 0);
- sk->sk_timer.expires = jiffies + 10 * HZ;
- add_timer(&sk->sk_timer);
- } else
- sock_put(sk);
-}
-
-/*
- * Handling for system calls applied via the various interfaces to a
- * ROSE socket object.
- */
-
-static int rose_setsockopt(struct socket *sock, int level, int optname,
- sockptr_t optval, unsigned int optlen)
-{
- struct sock *sk = sock->sk;
- struct rose_sock *rose = rose_sk(sk);
- unsigned int opt;
-
- if (level != SOL_ROSE)
- return -ENOPROTOOPT;
-
- if (optlen < sizeof(unsigned int))
- return -EINVAL;
-
- if (copy_from_sockptr(&opt, optval, sizeof(unsigned int)))
- return -EFAULT;
-
- switch (optname) {
- case ROSE_DEFER:
- rose->defer = opt ? 1 : 0;
- return 0;
-
- case ROSE_T1:
- if (opt < 1 || opt > UINT_MAX / HZ)
- return -EINVAL;
- rose->t1 = opt * HZ;
- return 0;
-
- case ROSE_T2:
- if (opt < 1 || opt > UINT_MAX / HZ)
- return -EINVAL;
- rose->t2 = opt * HZ;
- return 0;
-
- case ROSE_T3:
- if (opt < 1 || opt > UINT_MAX / HZ)
- return -EINVAL;
- rose->t3 = opt * HZ;
- return 0;
-
- case ROSE_HOLDBACK:
- if (opt < 1 || opt > UINT_MAX / HZ)
- return -EINVAL;
- rose->hb = opt * HZ;
- return 0;
-
- case ROSE_IDLE:
- if (opt > UINT_MAX / (60 * HZ))
- return -EINVAL;
- rose->idle = opt * 60 * HZ;
- return 0;
-
- case ROSE_QBITINCL:
- rose->qbitincl = opt ? 1 : 0;
- return 0;
-
- default:
- return -ENOPROTOOPT;
- }
-}
-
-static int rose_getsockopt(struct socket *sock, int level, int optname,
- char __user *optval, int __user *optlen)
-{
- struct sock *sk = sock->sk;
- struct rose_sock *rose = rose_sk(sk);
- int val = 0;
- int len;
-
- if (level != SOL_ROSE)
- return -ENOPROTOOPT;
-
- if (get_user(len, optlen))
- return -EFAULT;
-
- if (len < 0)
- return -EINVAL;
-
- switch (optname) {
- case ROSE_DEFER:
- val = rose->defer;
- break;
-
- case ROSE_T1:
- val = rose->t1 / HZ;
- break;
-
- case ROSE_T2:
- val = rose->t2 / HZ;
- break;
-
- case ROSE_T3:
- val = rose->t3 / HZ;
- break;
-
- case ROSE_HOLDBACK:
- val = rose->hb / HZ;
- break;
-
- case ROSE_IDLE:
- val = rose->idle / (60 * HZ);
- break;
-
- case ROSE_QBITINCL:
- val = rose->qbitincl;
- break;
-
- default:
- return -ENOPROTOOPT;
- }
-
- len = min_t(unsigned int, len, sizeof(int));
-
- if (put_user(len, optlen))
- return -EFAULT;
-
- return copy_to_user(optval, &val, len) ? -EFAULT : 0;
-}
-
-static int rose_listen(struct socket *sock, int backlog)
-{
- struct sock *sk = sock->sk;
-
- lock_sock(sk);
- if (sock->state != SS_UNCONNECTED) {
- release_sock(sk);
- return -EINVAL;
- }
-
- if (sk->sk_state != TCP_LISTEN) {
- struct rose_sock *rose = rose_sk(sk);
-
- rose->dest_ndigis = 0;
- memset(&rose->dest_addr, 0, ROSE_ADDR_LEN);
- memset(&rose->dest_call, 0, AX25_ADDR_LEN);
- memset(rose->dest_digis, 0, AX25_ADDR_LEN * ROSE_MAX_DIGIS);
- sk->sk_max_ack_backlog = backlog;
- sk->sk_state = TCP_LISTEN;
- release_sock(sk);
- return 0;
- }
- release_sock(sk);
-
- return -EOPNOTSUPP;
-}
-
-static struct proto rose_proto = {
- .name = "ROSE",
- .owner = THIS_MODULE,
- .obj_size = sizeof(struct rose_sock),
-};
-
-static int rose_create(struct net *net, struct socket *sock, int protocol,
- int kern)
-{
- struct sock *sk;
- struct rose_sock *rose;
-
- if (!net_eq(net, &init_net))
- return -EAFNOSUPPORT;
-
- if (sock->type != SOCK_SEQPACKET || protocol != 0)
- return -ESOCKTNOSUPPORT;
-
- sk = sk_alloc(net, PF_ROSE, GFP_ATOMIC, &rose_proto, kern);
- if (sk == NULL)
- return -ENOMEM;
-
- rose = rose_sk(sk);
-
- sock_init_data(sock, sk);
-
- skb_queue_head_init(&rose->ack_queue);
-#ifdef M_BIT
- skb_queue_head_init(&rose->frag_queue);
- rose->fraglen = 0;
-#endif
-
- sock->ops = &rose_proto_ops;
- sk->sk_protocol = protocol;
-
- timer_setup(&rose->timer, NULL, 0);
- timer_setup(&rose->idletimer, NULL, 0);
-
- rose->t1 = msecs_to_jiffies(sysctl_rose_call_request_timeout);
- rose->t2 = msecs_to_jiffies(sysctl_rose_reset_request_timeout);
- rose->t3 = msecs_to_jiffies(sysctl_rose_clear_request_timeout);
- rose->hb = msecs_to_jiffies(sysctl_rose_ack_hold_back_timeout);
- rose->idle = msecs_to_jiffies(sysctl_rose_no_activity_timeout);
-
- rose->state = ROSE_STATE_0;
-
- return 0;
-}
-
-static struct sock *rose_make_new(struct sock *osk)
-{
- struct sock *sk;
- struct rose_sock *rose, *orose;
-
- if (osk->sk_type != SOCK_SEQPACKET)
- return NULL;
-
- sk = sk_alloc(sock_net(osk), PF_ROSE, GFP_ATOMIC, &rose_proto, 0);
- if (sk == NULL)
- return NULL;
-
- rose = rose_sk(sk);
-
- sock_init_data(NULL, sk);
-
- skb_queue_head_init(&rose->ack_queue);
-#ifdef M_BIT
- skb_queue_head_init(&rose->frag_queue);
- rose->fraglen = 0;
-#endif
-
- sk->sk_type = osk->sk_type;
- sk->sk_priority = READ_ONCE(osk->sk_priority);
- sk->sk_protocol = osk->sk_protocol;
- sk->sk_rcvbuf = osk->sk_rcvbuf;
- sk->sk_sndbuf = osk->sk_sndbuf;
- sk->sk_state = TCP_ESTABLISHED;
- sock_copy_flags(sk, osk);
-
- timer_setup(&rose->timer, NULL, 0);
- timer_setup(&rose->idletimer, NULL, 0);
-
- orose = rose_sk(osk);
- rose->t1 = orose->t1;
- rose->t2 = orose->t2;
- rose->t3 = orose->t3;
- rose->hb = orose->hb;
- rose->idle = orose->idle;
- rose->defer = orose->defer;
- rose->device = orose->device;
- if (rose->device)
- netdev_hold(rose->device, &rose->dev_tracker, GFP_ATOMIC);
- rose->qbitincl = orose->qbitincl;
-
- return sk;
-}
-
-static int rose_release(struct socket *sock)
-{
- struct sock *sk = sock->sk;
- struct rose_sock *rose;
-
- if (sk == NULL) return 0;
-
- sock_hold(sk);
- sock_orphan(sk);
- lock_sock(sk);
- rose = rose_sk(sk);
-
- switch (rose->state) {
- case ROSE_STATE_0:
- release_sock(sk);
- rose_disconnect(sk, 0, -1, -1);
- lock_sock(sk);
- rose_destroy_socket(sk);
- break;
-
- case ROSE_STATE_2:
- rose_neigh_put(rose->neighbour);
- release_sock(sk);
- rose_disconnect(sk, 0, -1, -1);
- lock_sock(sk);
- rose_destroy_socket(sk);
- break;
-
- case ROSE_STATE_1:
- case ROSE_STATE_3:
- case ROSE_STATE_4:
- case ROSE_STATE_5:
- rose_clear_queues(sk);
- rose_stop_idletimer(sk);
- rose_write_internal(sk, ROSE_CLEAR_REQUEST);
- rose_start_t3timer(sk);
- rose->state = ROSE_STATE_2;
- sk->sk_state = TCP_CLOSE;
- sk->sk_shutdown |= SEND_SHUTDOWN;
- sk->sk_state_change(sk);
- sock_set_flag(sk, SOCK_DEAD);
- sock_set_flag(sk, SOCK_DESTROY);
- break;
-
- default:
- break;
- }
-
- spin_lock_bh(&rose_list_lock);
- netdev_put(rose->device, &rose->dev_tracker);
- rose->device = NULL;
- spin_unlock_bh(&rose_list_lock);
- sock->sk = NULL;
- release_sock(sk);
- sock_put(sk);
-
- return 0;
-}
-
-static int rose_bind(struct socket *sock, struct sockaddr_unsized *uaddr, int addr_len)
-{
- struct sock *sk = sock->sk;
- struct rose_sock *rose = rose_sk(sk);
- struct sockaddr_rose *addr = (struct sockaddr_rose *)uaddr;
- struct net_device *dev;
- ax25_address *source;
- ax25_uid_assoc *user;
- int err = -EINVAL;
- int n;
-
- if (addr_len != sizeof(struct sockaddr_rose) && addr_len != sizeof(struct full_sockaddr_rose))
- return -EINVAL;
-
- if (addr->srose_family != AF_ROSE)
- return -EINVAL;
-
- if (addr_len == sizeof(struct sockaddr_rose) && addr->srose_ndigis > 1)
- return -EINVAL;
-
- if ((unsigned int) addr->srose_ndigis > ROSE_MAX_DIGIS)
- return -EINVAL;
-
- lock_sock(sk);
-
- if (!sock_flag(sk, SOCK_ZAPPED))
- goto out_release;
-
- err = -EADDRNOTAVAIL;
- dev = rose_dev_get(&addr->srose_addr);
- if (!dev)
- goto out_release;
-
- source = &addr->srose_call;
-
- user = ax25_findbyuid(current_euid());
- if (user) {
- rose->source_call = user->call;
- ax25_uid_put(user);
- } else {
- if (ax25_uid_policy && !capable(CAP_NET_BIND_SERVICE)) {
- dev_put(dev);
- err = -EACCES;
- goto out_release;
- }
- rose->source_call = *source;
- }
-
- rose->source_addr = addr->srose_addr;
- rose->device = dev;
- netdev_tracker_alloc(rose->device, &rose->dev_tracker, GFP_KERNEL);
- rose->source_ndigis = addr->srose_ndigis;
-
- if (addr_len == sizeof(struct full_sockaddr_rose)) {
- struct full_sockaddr_rose *full_addr = (struct full_sockaddr_rose *)uaddr;
- for (n = 0 ; n < addr->srose_ndigis ; n++)
- rose->source_digis[n] = full_addr->srose_digis[n];
- } else {
- if (rose->source_ndigis == 1) {
- rose->source_digis[0] = addr->srose_digi;
- }
- }
-
- rose_insert_socket(sk);
-
- sock_reset_flag(sk, SOCK_ZAPPED);
- err = 0;
-out_release:
- release_sock(sk);
- return err;
-}
-
-static int rose_connect(struct socket *sock, struct sockaddr_unsized *uaddr, int addr_len,
- int flags)
-{
- struct sock *sk = sock->sk;
- struct rose_sock *rose = rose_sk(sk);
- struct sockaddr_rose *addr = (struct sockaddr_rose *)uaddr;
- unsigned char cause, diagnostic;
- ax25_uid_assoc *user;
- int n, err = 0;
-
- if (addr_len != sizeof(struct sockaddr_rose) && addr_len != sizeof(struct full_sockaddr_rose))
- return -EINVAL;
-
- if (addr->srose_family != AF_ROSE)
- return -EINVAL;
-
- if (addr_len == sizeof(struct sockaddr_rose) && addr->srose_ndigis > 1)
- return -EINVAL;
-
- if ((unsigned int) addr->srose_ndigis > ROSE_MAX_DIGIS)
- return -EINVAL;
-
- /* Source + Destination digis should not exceed ROSE_MAX_DIGIS */
- if ((rose->source_ndigis + addr->srose_ndigis) > ROSE_MAX_DIGIS)
- return -EINVAL;
-
- lock_sock(sk);
-
- if (sk->sk_state == TCP_ESTABLISHED && sock->state == SS_CONNECTING) {
- /* Connect completed during a ERESTARTSYS event */
- sock->state = SS_CONNECTED;
- goto out_release;
- }
-
- if (sk->sk_state == TCP_CLOSE && sock->state == SS_CONNECTING) {
- sock->state = SS_UNCONNECTED;
- err = -ECONNREFUSED;
- goto out_release;
- }
-
- if (sk->sk_state == TCP_ESTABLISHED) {
- /* No reconnect on a seqpacket socket */
- err = -EISCONN;
- goto out_release;
- }
-
- if (sk->sk_state == TCP_SYN_SENT) {
- err = -EALREADY;
- goto out_release;
- }
-
- sk->sk_state = TCP_CLOSE;
- sock->state = SS_UNCONNECTED;
-
- rose->neighbour = rose_get_neigh(&addr->srose_addr, &cause,
- &diagnostic, 0);
- if (!rose->neighbour) {
- err = -ENETUNREACH;
- goto out_release;
- }
-
- rose->lci = rose_new_lci(rose->neighbour);
- if (!rose->lci) {
- err = -ENETUNREACH;
- rose_neigh_put(rose->neighbour);
- goto out_release;
- }
-
- if (sock_flag(sk, SOCK_ZAPPED)) { /* Must bind first - autobinding in this may or may not work */
- struct net_device *dev;
-
- sock_reset_flag(sk, SOCK_ZAPPED);
-
- dev = rose_dev_first();
- if (!dev) {
- err = -ENETUNREACH;
- rose_neigh_put(rose->neighbour);
- goto out_release;
- }
-
- user = ax25_findbyuid(current_euid());
- if (!user) {
- err = -EINVAL;
- rose_neigh_put(rose->neighbour);
- dev_put(dev);
- goto out_release;
- }
-
- memcpy(&rose->source_addr, dev->dev_addr, ROSE_ADDR_LEN);
- rose->source_call = user->call;
- rose->device = dev;
- netdev_tracker_alloc(rose->device, &rose->dev_tracker,
- GFP_KERNEL);
- ax25_uid_put(user);
-
- rose_insert_socket(sk); /* Finish the bind */
- }
- rose->dest_addr = addr->srose_addr;
- rose->dest_call = addr->srose_call;
- rose->rand = ((long)rose & 0xFFFF) + rose->lci;
- rose->dest_ndigis = addr->srose_ndigis;
-
- if (addr_len == sizeof(struct full_sockaddr_rose)) {
- struct full_sockaddr_rose *full_addr = (struct full_sockaddr_rose *)uaddr;
- for (n = 0 ; n < addr->srose_ndigis ; n++)
- rose->dest_digis[n] = full_addr->srose_digis[n];
- } else {
- if (rose->dest_ndigis == 1) {
- rose->dest_digis[0] = addr->srose_digi;
- }
- }
-
- /* Move to connecting socket, start sending Connect Requests */
- sock->state = SS_CONNECTING;
- sk->sk_state = TCP_SYN_SENT;
-
- rose->state = ROSE_STATE_1;
-
- rose_write_internal(sk, ROSE_CALL_REQUEST);
- rose_start_heartbeat(sk);
- rose_start_t1timer(sk);
-
- /* Now the loop */
- if (sk->sk_state != TCP_ESTABLISHED && (flags & O_NONBLOCK)) {
- err = -EINPROGRESS;
- goto out_release;
- }
-
- /*
- * A Connect Ack with Choke or timeout or failed routing will go to
- * closed.
- */
- if (sk->sk_state == TCP_SYN_SENT) {
- DEFINE_WAIT(wait);
-
- for (;;) {
- prepare_to_wait(sk_sleep(sk), &wait,
- TASK_INTERRUPTIBLE);
- if (sk->sk_state != TCP_SYN_SENT)
- break;
- if (!signal_pending(current)) {
- release_sock(sk);
- schedule();
- lock_sock(sk);
- continue;
- }
- err = -ERESTARTSYS;
- break;
- }
- finish_wait(sk_sleep(sk), &wait);
-
- if (err)
- goto out_release;
- }
-
- if (sk->sk_state != TCP_ESTABLISHED) {
- sock->state = SS_UNCONNECTED;
- err = sock_error(sk); /* Always set at this point */
- goto out_release;
- }
-
- sock->state = SS_CONNECTED;
-
-out_release:
- release_sock(sk);
-
- return err;
-}
-
-static int rose_accept(struct socket *sock, struct socket *newsock,
- struct proto_accept_arg *arg)
-{
- struct sk_buff *skb;
- struct sock *newsk;
- DEFINE_WAIT(wait);
- struct sock *sk;
- int err = 0;
-
- if ((sk = sock->sk) == NULL)
- return -EINVAL;
-
- lock_sock(sk);
- if (sk->sk_type != SOCK_SEQPACKET) {
- err = -EOPNOTSUPP;
- goto out_release;
- }
-
- if (sk->sk_state != TCP_LISTEN) {
- err = -EINVAL;
- goto out_release;
- }
-
- /*
- * The write queue this time is holding sockets ready to use
- * hooked into the SABM we saved
- */
- for (;;) {
- prepare_to_wait(sk_sleep(sk), &wait, TASK_INTERRUPTIBLE);
-
- skb = skb_dequeue(&sk->sk_receive_queue);
- if (skb)
- break;
-
- if (arg->flags & O_NONBLOCK) {
- err = -EWOULDBLOCK;
- break;
- }
- if (!signal_pending(current)) {
- release_sock(sk);
- schedule();
- lock_sock(sk);
- continue;
- }
- err = -ERESTARTSYS;
- break;
- }
- finish_wait(sk_sleep(sk), &wait);
- if (err)
- goto out_release;
-
- newsk = skb->sk;
- sock_graft(newsk, newsock);
-
- /* Now attach up the new socket */
- skb->sk = NULL;
- kfree_skb(skb);
- sk_acceptq_removed(sk);
-
-out_release:
- release_sock(sk);
-
- return err;
-}
-
-static int rose_getname(struct socket *sock, struct sockaddr *uaddr,
- int peer)
-{
- struct full_sockaddr_rose *srose = (struct full_sockaddr_rose *)uaddr;
- struct sock *sk = sock->sk;
- struct rose_sock *rose = rose_sk(sk);
- int n;
-
- memset(srose, 0, sizeof(*srose));
- if (peer != 0) {
- if (sk->sk_state != TCP_ESTABLISHED)
- return -ENOTCONN;
- srose->srose_family = AF_ROSE;
- srose->srose_addr = rose->dest_addr;
- srose->srose_call = rose->dest_call;
- srose->srose_ndigis = rose->dest_ndigis;
- for (n = 0; n < rose->dest_ndigis; n++)
- srose->srose_digis[n] = rose->dest_digis[n];
- } else {
- srose->srose_family = AF_ROSE;
- srose->srose_addr = rose->source_addr;
- srose->srose_call = rose->source_call;
- srose->srose_ndigis = rose->source_ndigis;
- for (n = 0; n < rose->source_ndigis; n++)
- srose->srose_digis[n] = rose->source_digis[n];
- }
-
- return sizeof(struct full_sockaddr_rose);
-}
-
-int rose_rx_call_request(struct sk_buff *skb, struct net_device *dev, struct rose_neigh *neigh, unsigned int lci)
-{
- struct sock *sk;
- struct sock *make;
- struct rose_sock *make_rose;
- struct rose_facilities_struct facilities;
- int n;
-
- skb->sk = NULL; /* Initially we don't know who it's for */
-
- /*
- * skb->data points to the rose frame start
- */
- memset(&facilities, 0x00, sizeof(struct rose_facilities_struct));
-
- if (!rose_parse_facilities(skb->data + ROSE_CALL_REQ_FACILITIES_OFF,
- skb->len - ROSE_CALL_REQ_FACILITIES_OFF,
- &facilities)) {
- rose_transmit_clear_request(neigh, lci, ROSE_INVALID_FACILITY, 76);
- return 0;
- }
-
- sk = rose_find_listener(&facilities.source_addr, &facilities.source_call);
-
- /*
- * We can't accept the Call Request.
- */
- if (sk == NULL || sk_acceptq_is_full(sk) ||
- (make = rose_make_new(sk)) == NULL) {
- rose_transmit_clear_request(neigh, lci, ROSE_NETWORK_CONGESTION, 120);
- return 0;
- }
-
- skb->sk = make;
- make->sk_state = TCP_ESTABLISHED;
- make_rose = rose_sk(make);
-
- make_rose->lci = lci;
- make_rose->dest_addr = facilities.dest_addr;
- make_rose->dest_call = facilities.dest_call;
- make_rose->dest_ndigis = facilities.dest_ndigis;
- for (n = 0 ; n < facilities.dest_ndigis ; n++)
- make_rose->dest_digis[n] = facilities.dest_digis[n];
- make_rose->source_addr = facilities.source_addr;
- make_rose->source_call = facilities.source_call;
- make_rose->source_ndigis = facilities.source_ndigis;
- for (n = 0 ; n < facilities.source_ndigis ; n++)
- make_rose->source_digis[n] = facilities.source_digis[n];
- make_rose->neighbour = neigh;
- make_rose->device = dev;
- /* Caller got a reference for us. */
- netdev_tracker_alloc(make_rose->device, &make_rose->dev_tracker,
- GFP_ATOMIC);
- make_rose->facilities = facilities;
-
- rose_neigh_hold(make_rose->neighbour);
-
- if (rose_sk(sk)->defer) {
- make_rose->state = ROSE_STATE_5;
- } else {
- rose_write_internal(make, ROSE_CALL_ACCEPTED);
- make_rose->state = ROSE_STATE_3;
- rose_start_idletimer(make);
- }
-
- make_rose->condition = 0x00;
- make_rose->vs = 0;
- make_rose->va = 0;
- make_rose->vr = 0;
- make_rose->vl = 0;
- sk_acceptq_added(sk);
-
- rose_insert_socket(make);
-
- skb_queue_head(&sk->sk_receive_queue, skb);
-
- rose_start_heartbeat(make);
-
- if (!sock_flag(sk, SOCK_DEAD))
- sk->sk_data_ready(sk);
-
- return 1;
-}
-
-static int rose_sendmsg(struct socket *sock, struct msghdr *msg, size_t len)
-{
- struct sock *sk = sock->sk;
- struct rose_sock *rose = rose_sk(sk);
- DECLARE_SOCKADDR(struct sockaddr_rose *, usrose, msg->msg_name);
- int err;
- struct full_sockaddr_rose srose;
- struct sk_buff *skb;
- unsigned char *asmptr;
- int n, size, qbit = 0;
-
- if (msg->msg_flags & ~(MSG_DONTWAIT|MSG_EOR|MSG_CMSG_COMPAT))
- return -EINVAL;
-
- if (sock_flag(sk, SOCK_ZAPPED))
- return -EADDRNOTAVAIL;
-
- if (sk->sk_shutdown & SEND_SHUTDOWN) {
- send_sig(SIGPIPE, current, 0);
- return -EPIPE;
- }
-
- if (rose->neighbour == NULL || rose->device == NULL)
- return -ENETUNREACH;
-
- if (usrose != NULL) {
- if (msg->msg_namelen != sizeof(struct sockaddr_rose) && msg->msg_namelen != sizeof(struct full_sockaddr_rose))
- return -EINVAL;
- memset(&srose, 0, sizeof(struct full_sockaddr_rose));
- memcpy(&srose, usrose, msg->msg_namelen);
- if (rosecmp(&rose->dest_addr, &srose.srose_addr) != 0 ||
- ax25cmp(&rose->dest_call, &srose.srose_call) != 0)
- return -EISCONN;
- if (srose.srose_ndigis != rose->dest_ndigis)
- return -EISCONN;
- if (srose.srose_ndigis == rose->dest_ndigis) {
- for (n = 0 ; n < srose.srose_ndigis ; n++)
- if (ax25cmp(&rose->dest_digis[n],
- &srose.srose_digis[n]))
- return -EISCONN;
- }
- if (srose.srose_family != AF_ROSE)
- return -EINVAL;
- } else {
- if (sk->sk_state != TCP_ESTABLISHED)
- return -ENOTCONN;
-
- srose.srose_family = AF_ROSE;
- srose.srose_addr = rose->dest_addr;
- srose.srose_call = rose->dest_call;
- srose.srose_ndigis = rose->dest_ndigis;
- for (n = 0 ; n < rose->dest_ndigis ; n++)
- srose.srose_digis[n] = rose->dest_digis[n];
- }
-
- /* Build a packet */
- /* Sanity check the packet size */
- if (len > 65535)
- return -EMSGSIZE;
-
- size = len + AX25_BPQ_HEADER_LEN + AX25_MAX_HEADER_LEN + ROSE_MIN_LEN;
-
- if ((skb = sock_alloc_send_skb(sk, size, msg->msg_flags & MSG_DONTWAIT, &err)) == NULL)
- return err;
-
- skb_reserve(skb, AX25_BPQ_HEADER_LEN + AX25_MAX_HEADER_LEN + ROSE_MIN_LEN);
-
- /*
- * Put the data on the end
- */
-
- skb_reset_transport_header(skb);
- skb_put(skb, len);
-
- err = memcpy_from_msg(skb_transport_header(skb), msg, len);
- if (err) {
- kfree_skb(skb);
- return err;
- }
-
- /*
- * If the Q BIT Include socket option is in force, the first
- * byte of the user data is the logical value of the Q Bit.
- */
- if (rose->qbitincl) {
- qbit = skb->data[0];
- skb_pull(skb, 1);
- }
-
- /*
- * Push down the ROSE header
- */
- asmptr = skb_push(skb, ROSE_MIN_LEN);
-
- /* Build a ROSE Network header */
- asmptr[0] = ((rose->lci >> 8) & 0x0F) | ROSE_GFI;
- asmptr[1] = (rose->lci >> 0) & 0xFF;
- asmptr[2] = ROSE_DATA;
-
- if (qbit)
- asmptr[0] |= ROSE_Q_BIT;
-
- if (sk->sk_state != TCP_ESTABLISHED) {
- kfree_skb(skb);
- return -ENOTCONN;
- }
-
-#ifdef M_BIT
-#define ROSE_PACLEN (256-ROSE_MIN_LEN)
- if (skb->len - ROSE_MIN_LEN > ROSE_PACLEN) {
- unsigned char header[ROSE_MIN_LEN];
- struct sk_buff *skbn;
- int frontlen;
- int lg;
-
- /* Save a copy of the Header */
- skb_copy_from_linear_data(skb, header, ROSE_MIN_LEN);
- skb_pull(skb, ROSE_MIN_LEN);
-
- frontlen = skb_headroom(skb);
-
- while (skb->len > 0) {
- if ((skbn = sock_alloc_send_skb(sk, frontlen + ROSE_PACLEN, 0, &err)) == NULL) {
- kfree_skb(skb);
- return err;
- }
-
- skbn->sk = sk;
- skbn->free = 1;
- skbn->arp = 1;
-
- skb_reserve(skbn, frontlen);
-
- lg = (ROSE_PACLEN > skb->len) ? skb->len : ROSE_PACLEN;
-
- /* Copy the user data */
- skb_copy_from_linear_data(skb, skb_put(skbn, lg), lg);
- skb_pull(skb, lg);
-
- /* Duplicate the Header */
- skb_push(skbn, ROSE_MIN_LEN);
- skb_copy_to_linear_data(skbn, header, ROSE_MIN_LEN);
-
- if (skb->len > 0)
- skbn->data[2] |= M_BIT;
-
- skb_queue_tail(&sk->sk_write_queue, skbn); /* Throw it on the queue */
- }
-
- skb->free = 1;
- kfree_skb(skb);
- } else {
- skb_queue_tail(&sk->sk_write_queue, skb); /* Throw it on the queue */
- }
-#else
- skb_queue_tail(&sk->sk_write_queue, skb); /* Shove it onto the queue */
-#endif
-
- rose_kick(sk);
-
- return len;
-}
-
-
-static int rose_recvmsg(struct socket *sock, struct msghdr *msg, size_t size,
- int flags)
-{
- struct sock *sk = sock->sk;
- struct rose_sock *rose = rose_sk(sk);
- size_t copied;
- unsigned char *asmptr;
- struct sk_buff *skb;
- int n, er, qbit;
-
- /*
- * This works for seqpacket too. The receiver has ordered the queue for
- * us! We do one quick check first though
- */
- if (sk->sk_state != TCP_ESTABLISHED)
- return -ENOTCONN;
-
- /* Now we can treat all alike */
- skb = skb_recv_datagram(sk, flags, &er);
- if (!skb)
- return er;
-
- qbit = (skb->data[0] & ROSE_Q_BIT) == ROSE_Q_BIT;
-
- skb_pull(skb, ROSE_MIN_LEN);
-
- if (rose->qbitincl) {
- asmptr = skb_push(skb, 1);
- *asmptr = qbit;
- }
-
- skb_reset_transport_header(skb);
- copied = skb->len;
-
- if (copied > size) {
- copied = size;
- msg->msg_flags |= MSG_TRUNC;
- }
-
- skb_copy_datagram_msg(skb, 0, msg, copied);
-
- if (msg->msg_name) {
- struct sockaddr_rose *srose;
- DECLARE_SOCKADDR(struct full_sockaddr_rose *, full_srose,
- msg->msg_name);
-
- memset(msg->msg_name, 0, sizeof(struct full_sockaddr_rose));
- srose = msg->msg_name;
- srose->srose_family = AF_ROSE;
- srose->srose_addr = rose->dest_addr;
- srose->srose_call = rose->dest_call;
- srose->srose_ndigis = rose->dest_ndigis;
- for (n = 0 ; n < rose->dest_ndigis ; n++)
- full_srose->srose_digis[n] = rose->dest_digis[n];
- msg->msg_namelen = sizeof(struct full_sockaddr_rose);
- }
-
- skb_free_datagram(sk, skb);
-
- return copied;
-}
-
-
-static int rose_ioctl(struct socket *sock, unsigned int cmd, unsigned long arg)
-{
- struct sock *sk = sock->sk;
- struct rose_sock *rose = rose_sk(sk);
- void __user *argp = (void __user *)arg;
-
- switch (cmd) {
- case TIOCOUTQ: {
- long amount;
-
- amount = sk->sk_sndbuf - sk_wmem_alloc_get(sk);
- if (amount < 0)
- amount = 0;
- return put_user(amount, (unsigned int __user *) argp);
- }
-
- case TIOCINQ: {
- struct sk_buff *skb;
- long amount = 0L;
-
- spin_lock_irq(&sk->sk_receive_queue.lock);
- if ((skb = skb_peek(&sk->sk_receive_queue)) != NULL)
- amount = skb->len;
- spin_unlock_irq(&sk->sk_receive_queue.lock);
- return put_user(amount, (unsigned int __user *) argp);
- }
-
- case SIOCGIFADDR:
- case SIOCSIFADDR:
- case SIOCGIFDSTADDR:
- case SIOCSIFDSTADDR:
- case SIOCGIFBRDADDR:
- case SIOCSIFBRDADDR:
- case SIOCGIFNETMASK:
- case SIOCSIFNETMASK:
- case SIOCGIFMETRIC:
- case SIOCSIFMETRIC:
- return -EINVAL;
-
- case SIOCADDRT:
- case SIOCDELRT:
- case SIOCRSCLRRT:
- if (!capable(CAP_NET_ADMIN))
- return -EPERM;
- return rose_rt_ioctl(cmd, argp);
-
- case SIOCRSGCAUSE: {
- struct rose_cause_struct rose_cause;
- rose_cause.cause = rose->cause;
- rose_cause.diagnostic = rose->diagnostic;
- return copy_to_user(argp, &rose_cause, sizeof(struct rose_cause_struct)) ? -EFAULT : 0;
- }
-
- case SIOCRSSCAUSE: {
- struct rose_cause_struct rose_cause;
- if (copy_from_user(&rose_cause, argp, sizeof(struct rose_cause_struct)))
- return -EFAULT;
- rose->cause = rose_cause.cause;
- rose->diagnostic = rose_cause.diagnostic;
- return 0;
- }
-
- case SIOCRSSL2CALL:
- if (!capable(CAP_NET_ADMIN)) return -EPERM;
- if (ax25cmp(&rose_callsign, &null_ax25_address) != 0)
- ax25_listen_release(&rose_callsign, NULL);
- if (copy_from_user(&rose_callsign, argp, sizeof(ax25_address)))
- return -EFAULT;
- if (ax25cmp(&rose_callsign, &null_ax25_address) != 0)
- return ax25_listen_register(&rose_callsign, NULL);
-
- return 0;
-
- case SIOCRSGL2CALL:
- return copy_to_user(argp, &rose_callsign, sizeof(ax25_address)) ? -EFAULT : 0;
-
- case SIOCRSACCEPT:
- if (rose->state == ROSE_STATE_5) {
- rose_write_internal(sk, ROSE_CALL_ACCEPTED);
- rose_start_idletimer(sk);
- rose->condition = 0x00;
- rose->vs = 0;
- rose->va = 0;
- rose->vr = 0;
- rose->vl = 0;
- rose->state = ROSE_STATE_3;
- }
- return 0;
-
- default:
- return -ENOIOCTLCMD;
- }
-
- return 0;
-}
-
-#ifdef CONFIG_PROC_FS
-static void *rose_info_start(struct seq_file *seq, loff_t *pos)
- __acquires(rose_list_lock)
-{
- spin_lock_bh(&rose_list_lock);
- return seq_hlist_start_head(&rose_list, *pos);
-}
-
-static void *rose_info_next(struct seq_file *seq, void *v, loff_t *pos)
-{
- return seq_hlist_next(v, &rose_list, pos);
-}
-
-static void rose_info_stop(struct seq_file *seq, void *v)
- __releases(rose_list_lock)
-{
- spin_unlock_bh(&rose_list_lock);
-}
-
-static int rose_info_show(struct seq_file *seq, void *v)
-{
- char buf[11], rsbuf[11];
-
- if (v == SEQ_START_TOKEN)
- seq_puts(seq,
- "dest_addr dest_call src_addr src_call dev lci neigh st vs vr va t t1 t2 t3 hb idle Snd-Q Rcv-Q inode\n");
-
- else {
- struct sock *s = sk_entry(v);
- struct rose_sock *rose = rose_sk(s);
- const char *devname, *callsign;
- const struct net_device *dev = rose->device;
-
- if (!dev)
- devname = "???";
- else
- devname = dev->name;
-
- seq_printf(seq, "%-10s %-9s ",
- rose2asc(rsbuf, &rose->dest_addr),
- ax2asc(buf, &rose->dest_call));
-
- if (ax25cmp(&rose->source_call, &null_ax25_address) == 0)
- callsign = "??????-?";
- else
- callsign = ax2asc(buf, &rose->source_call);
-
- seq_printf(seq,
- "%-10s %-9s %-5s %3.3X %05d %d %d %d %d %3lu %3lu %3lu %3lu %3lu %3lu/%03lu %5d %5d %llu\n",
- rose2asc(rsbuf, &rose->source_addr),
- callsign,
- devname,
- rose->lci & 0x0FFF,
- (rose->neighbour) ? rose->neighbour->number : 0,
- rose->state,
- rose->vs,
- rose->vr,
- rose->va,
- ax25_display_timer(&rose->timer) / HZ,
- rose->t1 / HZ,
- rose->t2 / HZ,
- rose->t3 / HZ,
- rose->hb / HZ,
- ax25_display_timer(&rose->idletimer) / (60 * HZ),
- rose->idle / (60 * HZ),
- sk_wmem_alloc_get(s),
- sk_rmem_alloc_get(s),
- s->sk_socket ? SOCK_INODE(s->sk_socket)->i_ino : (u64)0);
- }
-
- return 0;
-}
-
-static const struct seq_operations rose_info_seqops = {
- .start = rose_info_start,
- .next = rose_info_next,
- .stop = rose_info_stop,
- .show = rose_info_show,
-};
-#endif /* CONFIG_PROC_FS */
-
-static const struct net_proto_family rose_family_ops = {
- .family = PF_ROSE,
- .create = rose_create,
- .owner = THIS_MODULE,
-};
-
-static const struct proto_ops rose_proto_ops = {
- .family = PF_ROSE,
- .owner = THIS_MODULE,
- .release = rose_release,
- .bind = rose_bind,
- .connect = rose_connect,
- .socketpair = sock_no_socketpair,
- .accept = rose_accept,
- .getname = rose_getname,
- .poll = datagram_poll,
- .ioctl = rose_ioctl,
- .gettstamp = sock_gettstamp,
- .listen = rose_listen,
- .shutdown = sock_no_shutdown,
- .setsockopt = rose_setsockopt,
- .getsockopt = rose_getsockopt,
- .sendmsg = rose_sendmsg,
- .recvmsg = rose_recvmsg,
- .mmap = sock_no_mmap,
-};
-
-static struct notifier_block rose_dev_notifier = {
- .notifier_call = rose_device_event,
-};
-
-static struct net_device **dev_rose;
-
-static struct ax25_protocol rose_pid = {
- .pid = AX25_P_ROSE,
- .func = rose_route_frame
-};
-
-static struct ax25_linkfail rose_linkfail_notifier = {
- .func = rose_link_failed
-};
-
-static int __init rose_proto_init(void)
-{
- int i;
- int rc;
-
- if (rose_ndevs > 0x7FFFFFFF/sizeof(struct net_device *)) {
- printk(KERN_ERR "ROSE: rose_proto_init - rose_ndevs parameter too large\n");
- rc = -EINVAL;
- goto out;
- }
-
- rc = proto_register(&rose_proto, 0);
- if (rc != 0)
- goto out;
-
- rose_callsign = null_ax25_address;
-
- dev_rose = kzalloc_objs(struct net_device *, rose_ndevs);
- if (dev_rose == NULL) {
- printk(KERN_ERR "ROSE: rose_proto_init - unable to allocate device structure\n");
- rc = -ENOMEM;
- goto out_proto_unregister;
- }
-
- for (i = 0; i < rose_ndevs; i++) {
- struct net_device *dev;
- char name[IFNAMSIZ];
-
- sprintf(name, "rose%d", i);
- dev = alloc_netdev(0, name, NET_NAME_UNKNOWN, rose_setup);
- if (!dev) {
- printk(KERN_ERR "ROSE: rose_proto_init - unable to allocate memory\n");
- rc = -ENOMEM;
- goto fail;
- }
- rc = register_netdev(dev);
- if (rc) {
- printk(KERN_ERR "ROSE: netdevice registration failed\n");
- free_netdev(dev);
- goto fail;
- }
- rose_set_lockdep_key(dev);
- dev_rose[i] = dev;
- }
-
- sock_register(&rose_family_ops);
- register_netdevice_notifier(&rose_dev_notifier);
-
- ax25_register_pid(&rose_pid);
- ax25_linkfail_register(&rose_linkfail_notifier);
-
-#ifdef CONFIG_SYSCTL
- rose_register_sysctl();
-#endif
- rose_loopback_init();
-
- rose_add_loopback_neigh();
-
- proc_create_seq("rose", 0444, init_net.proc_net, &rose_info_seqops);
- proc_create_seq("rose_neigh", 0444, init_net.proc_net,
- &rose_neigh_seqops);
- proc_create_seq("rose_nodes", 0444, init_net.proc_net,
- &rose_node_seqops);
- proc_create_seq("rose_routes", 0444, init_net.proc_net,
- &rose_route_seqops);
-out:
- return rc;
-fail:
- while (--i >= 0) {
- unregister_netdev(dev_rose[i]);
- free_netdev(dev_rose[i]);
- }
- kfree(dev_rose);
-out_proto_unregister:
- proto_unregister(&rose_proto);
- goto out;
-}
-module_init(rose_proto_init);
-
-module_param(rose_ndevs, int, 0);
-MODULE_PARM_DESC(rose_ndevs, "number of ROSE devices");
-
-MODULE_AUTHOR("Jonathan Naylor G4KLX <g4klx@g4klx.demon.co.uk>");
-MODULE_DESCRIPTION("The amateur radio ROSE network layer protocol");
-MODULE_LICENSE("GPL");
-MODULE_ALIAS_NETPROTO(PF_ROSE);
-
-static void __exit rose_exit(void)
-{
- int i;
-
- remove_proc_entry("rose", init_net.proc_net);
- remove_proc_entry("rose_neigh", init_net.proc_net);
- remove_proc_entry("rose_nodes", init_net.proc_net);
- remove_proc_entry("rose_routes", init_net.proc_net);
- rose_loopback_clear();
-
- rose_rt_free();
-
- ax25_protocol_release(AX25_P_ROSE);
- ax25_linkfail_release(&rose_linkfail_notifier);
-
- if (ax25cmp(&rose_callsign, &null_ax25_address) != 0)
- ax25_listen_release(&rose_callsign, NULL);
-
-#ifdef CONFIG_SYSCTL
- rose_unregister_sysctl();
-#endif
- unregister_netdevice_notifier(&rose_dev_notifier);
-
- sock_unregister(PF_ROSE);
-
- for (i = 0; i < rose_ndevs; i++) {
- struct net_device *dev = dev_rose[i];
-
- if (dev) {
- unregister_netdev(dev);
- free_netdev(dev);
- }
- }
-
- kfree(dev_rose);
- proto_unregister(&rose_proto);
-}
-
-module_exit(rose_exit);
+++ /dev/null
-// SPDX-License-Identifier: GPL-2.0-or-later
-/*
- *
- * Copyright (C) Jonathan Naylor G4KLX (g4klx@g4klx.demon.co.uk)
- */
-#include <linux/module.h>
-#include <linux/proc_fs.h>
-#include <linux/kernel.h>
-#include <linux/interrupt.h>
-#include <linux/fs.h>
-#include <linux/types.h>
-#include <linux/sysctl.h>
-#include <linux/string.h>
-#include <linux/socket.h>
-#include <linux/errno.h>
-#include <linux/fcntl.h>
-#include <linux/in.h>
-#include <linux/if_ether.h>
-#include <linux/slab.h>
-
-#include <asm/io.h>
-
-#include <linux/inet.h>
-#include <linux/netdevice.h>
-#include <linux/etherdevice.h>
-#include <linux/if_arp.h>
-#include <linux/skbuff.h>
-
-#include <net/ip.h>
-#include <net/arp.h>
-
-#include <net/ax25.h>
-#include <net/rose.h>
-
-static int rose_header(struct sk_buff *skb, struct net_device *dev,
- unsigned short type,
- const void *daddr, const void *saddr, unsigned int len)
-{
- unsigned char *buff = skb_push(skb, ROSE_MIN_LEN + 2);
-
- if (daddr)
- memcpy(buff + 7, daddr, dev->addr_len);
-
- *buff++ = ROSE_GFI | ROSE_Q_BIT;
- *buff++ = 0x00;
- *buff++ = ROSE_DATA;
- *buff++ = 0x7F;
- *buff++ = AX25_P_IP;
-
- if (daddr != NULL)
- return 37;
-
- return -37;
-}
-
-static int rose_set_mac_address(struct net_device *dev, void *addr)
-{
- struct sockaddr *sa = addr;
- int err;
-
- if (!memcmp(dev->dev_addr, sa->sa_data, dev->addr_len))
- return 0;
-
- if (dev->flags & IFF_UP) {
- err = rose_add_loopback_node((rose_address *)sa->sa_data);
- if (err)
- return err;
-
- rose_del_loopback_node((const rose_address *)dev->dev_addr);
- }
-
- dev_addr_set(dev, sa->sa_data);
-
- return 0;
-}
-
-static int rose_open(struct net_device *dev)
-{
- int err;
-
- err = rose_add_loopback_node((const rose_address *)dev->dev_addr);
- if (err)
- return err;
-
- netif_start_queue(dev);
-
- return 0;
-}
-
-static int rose_close(struct net_device *dev)
-{
- netif_stop_queue(dev);
- rose_del_loopback_node((const rose_address *)dev->dev_addr);
- return 0;
-}
-
-static netdev_tx_t rose_xmit(struct sk_buff *skb, struct net_device *dev)
-{
- struct net_device_stats *stats = &dev->stats;
- unsigned int len = skb->len;
-
- if (!netif_running(dev)) {
- printk(KERN_ERR "ROSE: rose_xmit - called when iface is down\n");
- return NETDEV_TX_BUSY;
- }
-
- if (!rose_route_frame(skb, NULL)) {
- dev_kfree_skb(skb);
- stats->tx_errors++;
- return NETDEV_TX_OK;
- }
-
- stats->tx_packets++;
- stats->tx_bytes += len;
- return NETDEV_TX_OK;
-}
-
-static const struct header_ops rose_header_ops = {
- .create = rose_header,
-};
-
-static const struct net_device_ops rose_netdev_ops = {
- .ndo_open = rose_open,
- .ndo_stop = rose_close,
- .ndo_start_xmit = rose_xmit,
- .ndo_set_mac_address = rose_set_mac_address,
-};
-
-void rose_setup(struct net_device *dev)
-{
- dev->mtu = ROSE_MAX_PACKET_SIZE - 2;
- dev->netdev_ops = &rose_netdev_ops;
-
- dev->header_ops = &rose_header_ops;
- dev->hard_header_len = AX25_BPQ_HEADER_LEN + AX25_MAX_HEADER_LEN + ROSE_MIN_LEN;
- dev->addr_len = ROSE_ADDR_LEN;
- dev->type = ARPHRD_ROSE;
-
- /* New-style flags. */
- dev->flags = IFF_NOARP;
-}
+++ /dev/null
-// SPDX-License-Identifier: GPL-2.0-or-later
-/*
- *
- * Copyright (C) Jonathan Naylor G4KLX (g4klx@g4klx.demon.co.uk)
- *
- * Most of this code is based on the SDL diagrams published in the 7th ARRL
- * Computer Networking Conference papers. The diagrams have mistakes in them,
- * but are mostly correct. Before you modify the code could you read the SDL
- * diagrams as the code is not obvious and probably very easy to break.
- */
-#include <linux/errno.h>
-#include <linux/filter.h>
-#include <linux/types.h>
-#include <linux/socket.h>
-#include <linux/in.h>
-#include <linux/kernel.h>
-#include <linux/timer.h>
-#include <linux/string.h>
-#include <linux/sockios.h>
-#include <linux/net.h>
-#include <net/ax25.h>
-#include <linux/inet.h>
-#include <linux/netdevice.h>
-#include <linux/skbuff.h>
-#include <net/sock.h>
-#include <net/tcp_states.h>
-#include <linux/fcntl.h>
-#include <linux/mm.h>
-#include <linux/interrupt.h>
-#include <net/rose.h>
-
-/*
- * State machine for state 1, Awaiting Call Accepted State.
- * The handling of the timer(s) is in file rose_timer.c.
- * Handling of state 0 and connection release is in af_rose.c.
- */
-static int rose_state1_machine(struct sock *sk, struct sk_buff *skb, int frametype)
-{
- struct rose_sock *rose = rose_sk(sk);
-
- switch (frametype) {
- case ROSE_CALL_ACCEPTED:
- rose_stop_timer(sk);
- rose_start_idletimer(sk);
- rose->condition = 0x00;
- rose->vs = 0;
- rose->va = 0;
- rose->vr = 0;
- rose->vl = 0;
- rose->state = ROSE_STATE_3;
- sk->sk_state = TCP_ESTABLISHED;
- if (!sock_flag(sk, SOCK_DEAD))
- sk->sk_state_change(sk);
- break;
-
- case ROSE_CLEAR_REQUEST:
- rose_write_internal(sk, ROSE_CLEAR_CONFIRMATION);
- rose_disconnect(sk, ECONNREFUSED, skb->data[3], skb->data[4]);
- rose_neigh_put(rose->neighbour);
- break;
-
- default:
- break;
- }
-
- return 0;
-}
-
-/*
- * State machine for state 2, Awaiting Clear Confirmation State.
- * The handling of the timer(s) is in file rose_timer.c
- * Handling of state 0 and connection release is in af_rose.c.
- */
-static int rose_state2_machine(struct sock *sk, struct sk_buff *skb, int frametype)
-{
- struct rose_sock *rose = rose_sk(sk);
-
- switch (frametype) {
- case ROSE_CLEAR_REQUEST:
- rose_write_internal(sk, ROSE_CLEAR_CONFIRMATION);
- rose_disconnect(sk, 0, skb->data[3], skb->data[4]);
- rose_neigh_put(rose->neighbour);
- break;
-
- case ROSE_CLEAR_CONFIRMATION:
- rose_disconnect(sk, 0, -1, -1);
- rose_neigh_put(rose->neighbour);
- break;
-
- default:
- break;
- }
-
- return 0;
-}
-
-/*
- * State machine for state 3, Connected State.
- * The handling of the timer(s) is in file rose_timer.c
- * Handling of state 0 and connection release is in af_rose.c.
- */
-static int rose_state3_machine(struct sock *sk, struct sk_buff *skb, int frametype, int ns, int nr, int q, int d, int m)
-{
- struct rose_sock *rose = rose_sk(sk);
- int queued = 0;
-
- switch (frametype) {
- case ROSE_RESET_REQUEST:
- rose_stop_timer(sk);
- rose_start_idletimer(sk);
- rose_write_internal(sk, ROSE_RESET_CONFIRMATION);
- rose->condition = 0x00;
- rose->vs = 0;
- rose->vr = 0;
- rose->va = 0;
- rose->vl = 0;
- rose_requeue_frames(sk);
- break;
-
- case ROSE_CLEAR_REQUEST:
- rose_write_internal(sk, ROSE_CLEAR_CONFIRMATION);
- rose_disconnect(sk, 0, skb->data[3], skb->data[4]);
- rose_neigh_put(rose->neighbour);
- break;
-
- case ROSE_RR:
- case ROSE_RNR:
- if (!rose_validate_nr(sk, nr)) {
- rose_write_internal(sk, ROSE_RESET_REQUEST);
- rose->condition = 0x00;
- rose->vs = 0;
- rose->vr = 0;
- rose->va = 0;
- rose->vl = 0;
- rose->state = ROSE_STATE_4;
- rose_start_t2timer(sk);
- rose_stop_idletimer(sk);
- } else {
- rose_frames_acked(sk, nr);
- if (frametype == ROSE_RNR) {
- rose->condition |= ROSE_COND_PEER_RX_BUSY;
- } else {
- rose->condition &= ~ROSE_COND_PEER_RX_BUSY;
- }
- }
- break;
-
- case ROSE_DATA: /* XXX */
- rose->condition &= ~ROSE_COND_PEER_RX_BUSY;
- if (!rose_validate_nr(sk, nr)) {
- rose_write_internal(sk, ROSE_RESET_REQUEST);
- rose->condition = 0x00;
- rose->vs = 0;
- rose->vr = 0;
- rose->va = 0;
- rose->vl = 0;
- rose->state = ROSE_STATE_4;
- rose_start_t2timer(sk);
- rose_stop_idletimer(sk);
- break;
- }
- rose_frames_acked(sk, nr);
- if (ns == rose->vr) {
- rose_start_idletimer(sk);
- if (!sk_filter_trim_cap(sk, skb, ROSE_MIN_LEN) &&
- __sock_queue_rcv_skb(sk, skb) == 0) {
- rose->vr = (rose->vr + 1) % ROSE_MODULUS;
- queued = 1;
- } else {
- /* Should never happen ! */
- rose_write_internal(sk, ROSE_RESET_REQUEST);
- rose->condition = 0x00;
- rose->vs = 0;
- rose->vr = 0;
- rose->va = 0;
- rose->vl = 0;
- rose->state = ROSE_STATE_4;
- rose_start_t2timer(sk);
- rose_stop_idletimer(sk);
- break;
- }
- if (atomic_read(&sk->sk_rmem_alloc) >
- (sk->sk_rcvbuf >> 1))
- rose->condition |= ROSE_COND_OWN_RX_BUSY;
- }
- /*
- * If the window is full, ack the frame, else start the
- * acknowledge hold back timer.
- */
- if (((rose->vl + sysctl_rose_window_size) % ROSE_MODULUS) == rose->vr) {
- rose->condition &= ~ROSE_COND_ACK_PENDING;
- rose_stop_timer(sk);
- rose_enquiry_response(sk);
- } else {
- rose->condition |= ROSE_COND_ACK_PENDING;
- rose_start_hbtimer(sk);
- }
- break;
-
- default:
- printk(KERN_WARNING "ROSE: unknown %02X in state 3\n", frametype);
- break;
- }
-
- return queued;
-}
-
-/*
- * State machine for state 4, Awaiting Reset Confirmation State.
- * The handling of the timer(s) is in file rose_timer.c
- * Handling of state 0 and connection release is in af_rose.c.
- */
-static int rose_state4_machine(struct sock *sk, struct sk_buff *skb, int frametype)
-{
- struct rose_sock *rose = rose_sk(sk);
-
- switch (frametype) {
- case ROSE_RESET_REQUEST:
- rose_write_internal(sk, ROSE_RESET_CONFIRMATION);
- fallthrough;
- case ROSE_RESET_CONFIRMATION:
- rose_stop_timer(sk);
- rose_start_idletimer(sk);
- rose->condition = 0x00;
- rose->va = 0;
- rose->vr = 0;
- rose->vs = 0;
- rose->vl = 0;
- rose->state = ROSE_STATE_3;
- rose_requeue_frames(sk);
- break;
-
- case ROSE_CLEAR_REQUEST:
- rose_write_internal(sk, ROSE_CLEAR_CONFIRMATION);
- rose_disconnect(sk, 0, skb->data[3], skb->data[4]);
- rose_neigh_put(rose->neighbour);
- break;
-
- default:
- break;
- }
-
- return 0;
-}
-
-/*
- * State machine for state 5, Awaiting Call Acceptance State.
- * The handling of the timer(s) is in file rose_timer.c
- * Handling of state 0 and connection release is in af_rose.c.
- */
-static int rose_state5_machine(struct sock *sk, struct sk_buff *skb, int frametype)
-{
- if (frametype == ROSE_CLEAR_REQUEST) {
- rose_write_internal(sk, ROSE_CLEAR_CONFIRMATION);
- rose_disconnect(sk, 0, skb->data[3], skb->data[4]);
- rose_neigh_put(rose_sk(sk)->neighbour);
- }
-
- return 0;
-}
-
-/* Higher level upcall for a LAPB frame */
-int rose_process_rx_frame(struct sock *sk, struct sk_buff *skb)
-{
- struct rose_sock *rose = rose_sk(sk);
- int queued = 0, frametype, ns, nr, q, d, m;
-
- if (rose->state == ROSE_STATE_0)
- return 0;
-
- frametype = rose_decode(skb, &ns, &nr, &q, &d, &m);
-
- /*
- * ROSE_CLEAR_REQUEST carries cause and diagnostic in bytes 3..4.
- * Reject a malformed frame that is too short to contain them.
- */
- if (frametype == ROSE_CLEAR_REQUEST && skb->len < 5)
- return 0;
-
- switch (rose->state) {
- case ROSE_STATE_1:
- queued = rose_state1_machine(sk, skb, frametype);
- break;
- case ROSE_STATE_2:
- queued = rose_state2_machine(sk, skb, frametype);
- break;
- case ROSE_STATE_3:
- queued = rose_state3_machine(sk, skb, frametype, ns, nr, q, d, m);
- break;
- case ROSE_STATE_4:
- queued = rose_state4_machine(sk, skb, frametype);
- break;
- case ROSE_STATE_5:
- queued = rose_state5_machine(sk, skb, frametype);
- break;
- }
-
- rose_kick(sk);
-
- return queued;
-}
+++ /dev/null
-// SPDX-License-Identifier: GPL-2.0-or-later
-/*
- *
- * Copyright (C) Jonathan Naylor G4KLX (g4klx@g4klx.demon.co.uk)
- */
-#include <linux/errno.h>
-#include <linux/types.h>
-#include <linux/socket.h>
-#include <linux/in.h>
-#include <linux/kernel.h>
-#include <linux/jiffies.h>
-#include <linux/timer.h>
-#include <linux/string.h>
-#include <linux/sockios.h>
-#include <linux/net.h>
-#include <linux/slab.h>
-#include <net/ax25.h>
-#include <linux/inet.h>
-#include <linux/netdevice.h>
-#include <linux/skbuff.h>
-#include <net/sock.h>
-#include <linux/fcntl.h>
-#include <linux/mm.h>
-#include <linux/interrupt.h>
-#include <net/rose.h>
-
-static void rose_ftimer_expiry(struct timer_list *);
-static void rose_t0timer_expiry(struct timer_list *);
-
-static void rose_transmit_restart_confirmation(struct rose_neigh *neigh);
-static void rose_transmit_restart_request(struct rose_neigh *neigh);
-
-void rose_start_ftimer(struct rose_neigh *neigh)
-{
- timer_delete(&neigh->ftimer);
-
- neigh->ftimer.function = rose_ftimer_expiry;
- neigh->ftimer.expires =
- jiffies + msecs_to_jiffies(sysctl_rose_link_fail_timeout);
-
- add_timer(&neigh->ftimer);
-}
-
-static void rose_start_t0timer(struct rose_neigh *neigh)
-{
- timer_delete(&neigh->t0timer);
-
- neigh->t0timer.function = rose_t0timer_expiry;
- neigh->t0timer.expires =
- jiffies + msecs_to_jiffies(sysctl_rose_restart_request_timeout);
-
- add_timer(&neigh->t0timer);
-}
-
-void rose_stop_ftimer(struct rose_neigh *neigh)
-{
- timer_delete(&neigh->ftimer);
-}
-
-void rose_stop_t0timer(struct rose_neigh *neigh)
-{
- timer_delete(&neigh->t0timer);
-}
-
-int rose_ftimer_running(struct rose_neigh *neigh)
-{
- return timer_pending(&neigh->ftimer);
-}
-
-static int rose_t0timer_running(struct rose_neigh *neigh)
-{
- return timer_pending(&neigh->t0timer);
-}
-
-static void rose_ftimer_expiry(struct timer_list *t)
-{
-}
-
-static void rose_t0timer_expiry(struct timer_list *t)
-{
- struct rose_neigh *neigh = timer_container_of(neigh, t, t0timer);
-
- rose_transmit_restart_request(neigh);
-
- neigh->dce_mode = 0;
-
- rose_start_t0timer(neigh);
-}
-
-/*
- * Interface to ax25_send_frame. Changes my level 2 callsign depending
- * on whether we have a global ROSE callsign or use the default port
- * callsign.
- */
-static int rose_send_frame(struct sk_buff *skb, struct rose_neigh *neigh)
-{
- const ax25_address *rose_call;
- ax25_cb *ax25s;
-
- if (ax25cmp(&rose_callsign, &null_ax25_address) == 0)
- rose_call = (const ax25_address *)neigh->dev->dev_addr;
- else
- rose_call = &rose_callsign;
-
- ax25s = neigh->ax25;
- neigh->ax25 = ax25_send_frame(skb, 260, rose_call, &neigh->callsign, neigh->digipeat, neigh->dev);
- if (ax25s)
- ax25_cb_put(ax25s);
-
- return neigh->ax25 != NULL;
-}
-
-/*
- * Interface to ax25_link_up. Changes my level 2 callsign depending
- * on whether we have a global ROSE callsign or use the default port
- * callsign.
- */
-static int rose_link_up(struct rose_neigh *neigh)
-{
- const ax25_address *rose_call;
- ax25_cb *ax25s;
-
- if (ax25cmp(&rose_callsign, &null_ax25_address) == 0)
- rose_call = (const ax25_address *)neigh->dev->dev_addr;
- else
- rose_call = &rose_callsign;
-
- ax25s = neigh->ax25;
- neigh->ax25 = ax25_find_cb(rose_call, &neigh->callsign, neigh->digipeat, neigh->dev);
- if (ax25s)
- ax25_cb_put(ax25s);
-
- return neigh->ax25 != NULL;
-}
-
-/*
- * This handles all restart and diagnostic frames.
- */
-void rose_link_rx_restart(struct sk_buff *skb, struct rose_neigh *neigh, unsigned short frametype)
-{
- struct sk_buff *skbn;
-
- switch (frametype) {
- case ROSE_RESTART_REQUEST:
- rose_stop_t0timer(neigh);
- neigh->restarted = 1;
- neigh->dce_mode = (skb->data[3] == ROSE_DTE_ORIGINATED);
- rose_transmit_restart_confirmation(neigh);
- break;
-
- case ROSE_RESTART_CONFIRMATION:
- rose_stop_t0timer(neigh);
- neigh->restarted = 1;
- break;
-
- case ROSE_DIAGNOSTIC:
- pr_warn("ROSE: received diagnostic #%d - %3ph\n", skb->data[3],
- skb->data + 4);
- break;
-
- default:
- printk(KERN_WARNING "ROSE: received unknown %02X with LCI 000\n", frametype);
- break;
- }
-
- if (neigh->restarted) {
- while ((skbn = skb_dequeue(&neigh->queue)) != NULL)
- if (!rose_send_frame(skbn, neigh))
- kfree_skb(skbn);
- }
-}
-
-/*
- * This routine is called when a Restart Request is needed
- */
-static void rose_transmit_restart_request(struct rose_neigh *neigh)
-{
- struct sk_buff *skb;
- unsigned char *dptr;
- int len;
-
- len = AX25_BPQ_HEADER_LEN + AX25_MAX_HEADER_LEN + ROSE_MIN_LEN + 3;
-
- if ((skb = alloc_skb(len, GFP_ATOMIC)) == NULL)
- return;
-
- skb_reserve(skb, AX25_BPQ_HEADER_LEN + AX25_MAX_HEADER_LEN);
-
- dptr = skb_put(skb, ROSE_MIN_LEN + 3);
-
- *dptr++ = AX25_P_ROSE;
- *dptr++ = ROSE_GFI;
- *dptr++ = 0x00;
- *dptr++ = ROSE_RESTART_REQUEST;
- *dptr++ = ROSE_DTE_ORIGINATED;
- *dptr++ = 0;
-
- if (!rose_send_frame(skb, neigh))
- kfree_skb(skb);
-}
-
-/*
- * This routine is called when a Restart Confirmation is needed
- */
-static void rose_transmit_restart_confirmation(struct rose_neigh *neigh)
-{
- struct sk_buff *skb;
- unsigned char *dptr;
- int len;
-
- len = AX25_BPQ_HEADER_LEN + AX25_MAX_HEADER_LEN + ROSE_MIN_LEN + 1;
-
- if ((skb = alloc_skb(len, GFP_ATOMIC)) == NULL)
- return;
-
- skb_reserve(skb, AX25_BPQ_HEADER_LEN + AX25_MAX_HEADER_LEN);
-
- dptr = skb_put(skb, ROSE_MIN_LEN + 1);
-
- *dptr++ = AX25_P_ROSE;
- *dptr++ = ROSE_GFI;
- *dptr++ = 0x00;
- *dptr++ = ROSE_RESTART_CONFIRMATION;
-
- if (!rose_send_frame(skb, neigh))
- kfree_skb(skb);
-}
-
-/*
- * This routine is called when a Clear Request is needed outside of the context
- * of a connected socket.
- */
-void rose_transmit_clear_request(struct rose_neigh *neigh, unsigned int lci, unsigned char cause, unsigned char diagnostic)
-{
- struct sk_buff *skb;
- unsigned char *dptr;
- int len;
-
- if (!neigh->dev)
- return;
-
- len = AX25_BPQ_HEADER_LEN + AX25_MAX_HEADER_LEN + ROSE_MIN_LEN + 3;
-
- if ((skb = alloc_skb(len, GFP_ATOMIC)) == NULL)
- return;
-
- skb_reserve(skb, AX25_BPQ_HEADER_LEN + AX25_MAX_HEADER_LEN);
-
- dptr = skb_put(skb, ROSE_MIN_LEN + 3);
-
- *dptr++ = AX25_P_ROSE;
- *dptr++ = ((lci >> 8) & 0x0F) | ROSE_GFI;
- *dptr++ = ((lci >> 0) & 0xFF);
- *dptr++ = ROSE_CLEAR_REQUEST;
- *dptr++ = cause;
- *dptr++ = diagnostic;
-
- if (!rose_send_frame(skb, neigh))
- kfree_skb(skb);
-}
-
-void rose_transmit_link(struct sk_buff *skb, struct rose_neigh *neigh)
-{
- unsigned char *dptr;
-
- if (neigh->loopback) {
- rose_loopback_queue(skb, neigh);
- return;
- }
-
- if (!rose_link_up(neigh))
- neigh->restarted = 0;
-
- dptr = skb_push(skb, 1);
- *dptr++ = AX25_P_ROSE;
-
- if (neigh->restarted) {
- if (!rose_send_frame(skb, neigh))
- kfree_skb(skb);
- } else {
- skb_queue_tail(&neigh->queue, skb);
-
- if (!rose_t0timer_running(neigh)) {
- rose_transmit_restart_request(neigh);
- neigh->dce_mode = 0;
- rose_start_t0timer(neigh);
- }
- }
-}
+++ /dev/null
-// SPDX-License-Identifier: GPL-2.0-or-later
-/*
- *
- * Copyright (C) Jonathan Naylor G4KLX (g4klx@g4klx.demon.co.uk)
- */
-#include <linux/types.h>
-#include <linux/slab.h>
-#include <linux/socket.h>
-#include <linux/timer.h>
-#include <net/ax25.h>
-#include <linux/skbuff.h>
-#include <net/rose.h>
-#include <linux/init.h>
-
-static struct sk_buff_head loopback_queue;
-#define ROSE_LOOPBACK_LIMIT 1000
-static struct timer_list loopback_timer;
-
-static void rose_set_loopback_timer(void);
-static void rose_loopback_timer(struct timer_list *unused);
-
-void rose_loopback_init(void)
-{
- skb_queue_head_init(&loopback_queue);
-
- timer_setup(&loopback_timer, rose_loopback_timer, 0);
-}
-
-static int rose_loopback_running(void)
-{
- return timer_pending(&loopback_timer);
-}
-
-int rose_loopback_queue(struct sk_buff *skb, struct rose_neigh *neigh)
-{
- struct sk_buff *skbn = NULL;
-
- if (skb_queue_len(&loopback_queue) < ROSE_LOOPBACK_LIMIT)
- skbn = skb_clone(skb, GFP_ATOMIC);
-
- if (skbn) {
- consume_skb(skb);
- skb_queue_tail(&loopback_queue, skbn);
-
- if (!rose_loopback_running())
- rose_set_loopback_timer();
- } else {
- kfree_skb(skb);
- }
-
- return 1;
-}
-
-static void rose_set_loopback_timer(void)
-{
- mod_timer(&loopback_timer, jiffies + 10);
-}
-
-static void rose_loopback_timer(struct timer_list *unused)
-{
- struct sk_buff *skb;
- struct net_device *dev;
- rose_address *dest;
- struct sock *sk;
- unsigned short frametype;
- unsigned int lci_i, lci_o;
- int count;
-
- for (count = 0; count < ROSE_LOOPBACK_LIMIT; count++) {
- skb = skb_dequeue(&loopback_queue);
- if (!skb)
- return;
- if (skb->len < ROSE_MIN_LEN) {
- kfree_skb(skb);
- continue;
- }
- lci_i = ((skb->data[0] << 8) & 0xF00) + ((skb->data[1] << 0) & 0x0FF);
- frametype = skb->data[2];
- if (frametype == ROSE_CALL_REQUEST &&
- (skb->len <= ROSE_CALL_REQ_FACILITIES_OFF ||
- skb->data[ROSE_CALL_REQ_ADDR_LEN_OFF] !=
- ROSE_CALL_REQ_ADDR_LEN_VAL)) {
- kfree_skb(skb);
- continue;
- }
- dest = (rose_address *)(skb->data + ROSE_CALL_REQ_DEST_ADDR_OFF);
- lci_o = ROSE_DEFAULT_MAXVC + 1 - lci_i;
-
- skb_reset_transport_header(skb);
-
- sk = rose_find_socket(lci_o, rose_loopback_neigh);
- if (sk) {
- if (rose_process_rx_frame(sk, skb) == 0)
- kfree_skb(skb);
- continue;
- }
-
- if (frametype == ROSE_CALL_REQUEST) {
- if (!rose_loopback_neigh->dev &&
- !rose_loopback_neigh->loopback) {
- kfree_skb(skb);
- continue;
- }
-
- dev = rose_dev_get(dest);
- if (!dev) {
- kfree_skb(skb);
- continue;
- }
-
- if (rose_rx_call_request(skb, dev, rose_loopback_neigh, lci_o) == 0) {
- dev_put(dev);
- kfree_skb(skb);
- }
- } else {
- kfree_skb(skb);
- }
- }
- if (!skb_queue_empty(&loopback_queue))
- mod_timer(&loopback_timer, jiffies + 1);
-}
-
-void __exit rose_loopback_clear(void)
-{
- struct sk_buff *skb;
-
- timer_delete(&loopback_timer);
-
- while ((skb = skb_dequeue(&loopback_queue)) != NULL) {
- skb->sk = NULL;
- kfree_skb(skb);
- }
-}
+++ /dev/null
-// SPDX-License-Identifier: GPL-2.0-or-later
-/*
- *
- * Copyright (C) Jonathan Naylor G4KLX (g4klx@g4klx.demon.co.uk)
- */
-#include <linux/errno.h>
-#include <linux/types.h>
-#include <linux/socket.h>
-#include <linux/in.h>
-#include <linux/kernel.h>
-#include <linux/timer.h>
-#include <linux/string.h>
-#include <linux/sockios.h>
-#include <linux/net.h>
-#include <linux/gfp.h>
-#include <net/ax25.h>
-#include <linux/inet.h>
-#include <linux/netdevice.h>
-#include <linux/skbuff.h>
-#include <net/sock.h>
-#include <linux/fcntl.h>
-#include <linux/mm.h>
-#include <linux/interrupt.h>
-#include <net/rose.h>
-
-/*
- * This procedure is passed a buffer descriptor for an iframe. It builds
- * the rest of the control part of the frame and then writes it out.
- */
-static void rose_send_iframe(struct sock *sk, struct sk_buff *skb)
-{
- struct rose_sock *rose = rose_sk(sk);
-
- if (skb == NULL)
- return;
-
- skb->data[2] |= (rose->vr << 5) & 0xE0;
- skb->data[2] |= (rose->vs << 1) & 0x0E;
-
- rose_start_idletimer(sk);
-
- rose_transmit_link(skb, rose->neighbour);
-}
-
-void rose_kick(struct sock *sk)
-{
- struct rose_sock *rose = rose_sk(sk);
- struct sk_buff *skb, *skbn;
- unsigned short start, end;
-
- if (rose->state != ROSE_STATE_3)
- return;
-
- if (rose->condition & ROSE_COND_PEER_RX_BUSY)
- return;
-
- if (!skb_peek(&sk->sk_write_queue))
- return;
-
- start = (skb_peek(&rose->ack_queue) == NULL) ? rose->va : rose->vs;
- end = (rose->va + sysctl_rose_window_size) % ROSE_MODULUS;
-
- if (start == end)
- return;
-
- rose->vs = start;
-
- /*
- * Transmit data until either we're out of data to send or
- * the window is full.
- */
-
- skb = skb_dequeue(&sk->sk_write_queue);
-
- do {
- if ((skbn = skb_clone(skb, GFP_ATOMIC)) == NULL) {
- skb_queue_head(&sk->sk_write_queue, skb);
- break;
- }
-
- skb_set_owner_w(skbn, sk);
-
- /*
- * Transmit the frame copy.
- */
- rose_send_iframe(sk, skbn);
-
- rose->vs = (rose->vs + 1) % ROSE_MODULUS;
-
- /*
- * Requeue the original data frame.
- */
- skb_queue_tail(&rose->ack_queue, skb);
-
- } while (rose->vs != end &&
- (skb = skb_dequeue(&sk->sk_write_queue)) != NULL);
-
- rose->vl = rose->vr;
- rose->condition &= ~ROSE_COND_ACK_PENDING;
-
- rose_stop_timer(sk);
-}
-
-/*
- * The following routines are taken from page 170 of the 7th ARRL Computer
- * Networking Conference paper, as is the whole state machine.
- */
-
-void rose_enquiry_response(struct sock *sk)
-{
- struct rose_sock *rose = rose_sk(sk);
-
- if (rose->condition & ROSE_COND_OWN_RX_BUSY)
- rose_write_internal(sk, ROSE_RNR);
- else
- rose_write_internal(sk, ROSE_RR);
-
- rose->vl = rose->vr;
- rose->condition &= ~ROSE_COND_ACK_PENDING;
-
- rose_stop_timer(sk);
-}
+++ /dev/null
-// SPDX-License-Identifier: GPL-2.0-or-later
-/*
- *
- * Copyright (C) Jonathan Naylor G4KLX (g4klx@g4klx.demon.co.uk)
- * Copyright (C) Terry Dawson VK2KTJ (terry@animats.net)
- */
-#include <linux/errno.h>
-#include <linux/types.h>
-#include <linux/socket.h>
-#include <linux/in.h>
-#include <linux/kernel.h>
-#include <linux/timer.h>
-#include <linux/string.h>
-#include <linux/sockios.h>
-#include <linux/net.h>
-#include <linux/slab.h>
-#include <net/ax25.h>
-#include <linux/inet.h>
-#include <linux/netdevice.h>
-#include <net/arp.h>
-#include <linux/if_arp.h>
-#include <linux/skbuff.h>
-#include <net/sock.h>
-#include <net/tcp_states.h>
-#include <linux/uaccess.h>
-#include <linux/fcntl.h>
-#include <linux/termios.h> /* For TIOCINQ/OUTQ */
-#include <linux/mm.h>
-#include <linux/interrupt.h>
-#include <linux/notifier.h>
-#include <linux/init.h>
-#include <net/rose.h>
-#include <linux/seq_file.h>
-#include <linux/export.h>
-
-static unsigned int rose_neigh_no = 1;
-
-static struct rose_node *rose_node_list;
-static DEFINE_SPINLOCK(rose_node_list_lock);
-static struct rose_neigh *rose_neigh_list;
-static DEFINE_SPINLOCK(rose_neigh_list_lock);
-static struct rose_route *rose_route_list;
-static DEFINE_SPINLOCK(rose_route_list_lock);
-
-struct rose_neigh *rose_loopback_neigh;
-
-/*
- * Add a new route to a node, and in the process add the node and the
- * neighbour if it is new.
- */
-static int __must_check rose_add_node(struct rose_route_struct *rose_route,
- struct net_device *dev)
-{
- struct rose_node *rose_node, *rose_tmpn, *rose_tmpp;
- struct rose_neigh *rose_neigh;
- int i, res = 0;
-
- spin_lock_bh(&rose_node_list_lock);
- spin_lock_bh(&rose_neigh_list_lock);
-
- rose_node = rose_node_list;
- while (rose_node != NULL) {
- if ((rose_node->mask == rose_route->mask) &&
- (rosecmpm(&rose_route->address, &rose_node->address,
- rose_route->mask) == 0))
- break;
- rose_node = rose_node->next;
- }
-
- if (rose_node != NULL && rose_node->loopback) {
- res = -EINVAL;
- goto out;
- }
-
- rose_neigh = rose_neigh_list;
- while (rose_neigh != NULL) {
- if (ax25cmp(&rose_route->neighbour,
- &rose_neigh->callsign) == 0 &&
- rose_neigh->dev == dev)
- break;
- rose_neigh = rose_neigh->next;
- }
-
- if (rose_neigh == NULL) {
- rose_neigh = kmalloc_obj(*rose_neigh, GFP_ATOMIC);
- if (rose_neigh == NULL) {
- res = -ENOMEM;
- goto out;
- }
-
- rose_neigh->callsign = rose_route->neighbour;
- rose_neigh->digipeat = NULL;
- rose_neigh->ax25 = NULL;
- rose_neigh->dev = dev;
- rose_neigh->count = 0;
- rose_neigh->dce_mode = 0;
- rose_neigh->loopback = 0;
- rose_neigh->number = rose_neigh_no++;
- rose_neigh->restarted = 0;
- refcount_set(&rose_neigh->use, 1);
-
- skb_queue_head_init(&rose_neigh->queue);
-
- timer_setup(&rose_neigh->ftimer, NULL, 0);
- timer_setup(&rose_neigh->t0timer, NULL, 0);
-
- if (rose_route->ndigis != 0) {
- rose_neigh->digipeat =
- kmalloc_obj(ax25_digi, GFP_ATOMIC);
- if (rose_neigh->digipeat == NULL) {
- kfree(rose_neigh);
- res = -ENOMEM;
- goto out;
- }
-
- rose_neigh->digipeat->ndigi = rose_route->ndigis;
- rose_neigh->digipeat->lastrepeat = -1;
-
- for (i = 0; i < rose_route->ndigis; i++) {
- rose_neigh->digipeat->calls[i] =
- rose_route->digipeaters[i];
- rose_neigh->digipeat->repeated[i] = 0;
- }
- }
-
- rose_neigh->next = rose_neigh_list;
- rose_neigh_list = rose_neigh;
- }
-
- /*
- * This is a new node to be inserted into the list. Find where it needs
- * to be inserted into the list, and insert it. We want to be sure
- * to order the list in descending order of mask size to ensure that
- * later when we are searching this list the first match will be the
- * best match.
- */
- if (rose_node == NULL) {
- rose_tmpn = rose_node_list;
- rose_tmpp = NULL;
-
- while (rose_tmpn != NULL) {
- if (rose_tmpn->mask > rose_route->mask) {
- rose_tmpp = rose_tmpn;
- rose_tmpn = rose_tmpn->next;
- } else {
- break;
- }
- }
-
- /* create new node */
- rose_node = kmalloc_obj(*rose_node, GFP_ATOMIC);
- if (rose_node == NULL) {
- res = -ENOMEM;
- goto out;
- }
-
- rose_node->address = rose_route->address;
- rose_node->mask = rose_route->mask;
- rose_node->count = 1;
- rose_node->loopback = 0;
- rose_node->neighbour[0] = rose_neigh;
-
- if (rose_tmpn == NULL) {
- if (rose_tmpp == NULL) { /* Empty list */
- rose_node_list = rose_node;
- rose_node->next = NULL;
- } else {
- rose_tmpp->next = rose_node;
- rose_node->next = NULL;
- }
- } else {
- if (rose_tmpp == NULL) { /* 1st node */
- rose_node->next = rose_node_list;
- rose_node_list = rose_node;
- } else {
- rose_tmpp->next = rose_node;
- rose_node->next = rose_tmpn;
- }
- }
- rose_neigh->count++;
- rose_neigh_hold(rose_neigh);
-
- goto out;
- }
-
- /* We have space, slot it in */
- if (rose_node->count < 3) {
- rose_node->neighbour[rose_node->count] = rose_neigh;
- rose_node->count++;
- rose_neigh->count++;
- rose_neigh_hold(rose_neigh);
- }
-
-out:
- spin_unlock_bh(&rose_neigh_list_lock);
- spin_unlock_bh(&rose_node_list_lock);
-
- return res;
-}
-
-/*
- * Caller is holding rose_node_list_lock.
- */
-static void rose_remove_node(struct rose_node *rose_node)
-{
- struct rose_node *s;
-
- if ((s = rose_node_list) == rose_node) {
- rose_node_list = rose_node->next;
- kfree(rose_node);
- return;
- }
-
- while (s != NULL && s->next != NULL) {
- if (s->next == rose_node) {
- s->next = rose_node->next;
- kfree(rose_node);
- return;
- }
-
- s = s->next;
- }
-}
-
-/*
- * Caller is holding rose_neigh_list_lock.
- */
-static void rose_remove_neigh(struct rose_neigh *rose_neigh)
-{
- struct rose_neigh *s;
-
- timer_delete_sync(&rose_neigh->ftimer);
- timer_delete_sync(&rose_neigh->t0timer);
-
- skb_queue_purge(&rose_neigh->queue);
-
- if ((s = rose_neigh_list) == rose_neigh) {
- rose_neigh_list = rose_neigh->next;
- return;
- }
-
- while (s != NULL && s->next != NULL) {
- if (s->next == rose_neigh) {
- s->next = rose_neigh->next;
- return;
- }
-
- s = s->next;
- }
-}
-
-/*
- * Caller is holding rose_route_list_lock.
- */
-static void rose_remove_route(struct rose_route *rose_route)
-{
- struct rose_route *s;
-
- if (rose_route->neigh1 != NULL)
- rose_neigh_put(rose_route->neigh1);
-
- if (rose_route->neigh2 != NULL)
- rose_neigh_put(rose_route->neigh2);
-
- if ((s = rose_route_list) == rose_route) {
- rose_route_list = rose_route->next;
- kfree(rose_route);
- return;
- }
-
- while (s != NULL && s->next != NULL) {
- if (s->next == rose_route) {
- s->next = rose_route->next;
- kfree(rose_route);
- return;
- }
-
- s = s->next;
- }
-}
-
-/*
- * "Delete" a node. Strictly speaking remove a route to a node. The node
- * is only deleted if no routes are left to it.
- */
-static int rose_del_node(struct rose_route_struct *rose_route,
- struct net_device *dev)
-{
- struct rose_node *rose_node;
- struct rose_neigh *rose_neigh;
- int i, err = 0;
-
- spin_lock_bh(&rose_node_list_lock);
- spin_lock_bh(&rose_neigh_list_lock);
-
- rose_node = rose_node_list;
- while (rose_node != NULL) {
- if ((rose_node->mask == rose_route->mask) &&
- (rosecmpm(&rose_route->address, &rose_node->address,
- rose_route->mask) == 0))
- break;
- rose_node = rose_node->next;
- }
-
- if (rose_node == NULL || rose_node->loopback) {
- err = -EINVAL;
- goto out;
- }
-
- rose_neigh = rose_neigh_list;
- while (rose_neigh != NULL) {
- if (ax25cmp(&rose_route->neighbour,
- &rose_neigh->callsign) == 0 &&
- rose_neigh->dev == dev)
- break;
- rose_neigh = rose_neigh->next;
- }
-
- if (rose_neigh == NULL) {
- err = -EINVAL;
- goto out;
- }
-
- for (i = 0; i < rose_node->count; i++) {
- if (rose_node->neighbour[i] == rose_neigh) {
- rose_neigh->count--;
- rose_neigh_put(rose_neigh);
-
- if (rose_neigh->count == 0) {
- rose_remove_neigh(rose_neigh);
- rose_neigh_put(rose_neigh);
- }
-
- rose_node->count--;
-
- if (rose_node->count == 0) {
- rose_remove_node(rose_node);
- } else {
- switch (i) {
- case 0:
- rose_node->neighbour[0] =
- rose_node->neighbour[1];
- fallthrough;
- case 1:
- rose_node->neighbour[1] =
- rose_node->neighbour[2];
- break;
- case 2:
- break;
- }
- }
- goto out;
- }
- }
- err = -EINVAL;
-
-out:
- spin_unlock_bh(&rose_neigh_list_lock);
- spin_unlock_bh(&rose_node_list_lock);
-
- return err;
-}
-
-/*
- * Add the loopback neighbour.
- */
-void rose_add_loopback_neigh(void)
-{
- struct rose_neigh *sn;
-
- rose_loopback_neigh = kmalloc_obj(struct rose_neigh);
- if (!rose_loopback_neigh)
- return;
- sn = rose_loopback_neigh;
-
- sn->callsign = null_ax25_address;
- sn->digipeat = NULL;
- sn->ax25 = NULL;
- sn->dev = NULL;
- sn->count = 0;
- sn->dce_mode = 1;
- sn->loopback = 1;
- sn->number = rose_neigh_no++;
- sn->restarted = 1;
- refcount_set(&sn->use, 1);
-
- skb_queue_head_init(&sn->queue);
-
- timer_setup(&sn->ftimer, NULL, 0);
- timer_setup(&sn->t0timer, NULL, 0);
-
- spin_lock_bh(&rose_neigh_list_lock);
- sn->next = rose_neigh_list;
- rose_neigh_list = sn;
- spin_unlock_bh(&rose_neigh_list_lock);
-}
-
-/*
- * Add a loopback node.
- */
-int rose_add_loopback_node(const rose_address *address)
-{
- struct rose_node *rose_node;
- int err = 0;
-
- spin_lock_bh(&rose_node_list_lock);
-
- rose_node = rose_node_list;
- while (rose_node != NULL) {
- if ((rose_node->mask == 10) &&
- (rosecmpm(address, &rose_node->address, 10) == 0) &&
- rose_node->loopback)
- break;
- rose_node = rose_node->next;
- }
-
- if (rose_node != NULL)
- goto out;
-
- if ((rose_node = kmalloc_obj(*rose_node, GFP_ATOMIC)) == NULL) {
- err = -ENOMEM;
- goto out;
- }
-
- rose_node->address = *address;
- rose_node->mask = 10;
- rose_node->count = 1;
- rose_node->loopback = 1;
- rose_node->neighbour[0] = rose_loopback_neigh;
-
- /* Insert at the head of list. Address is always mask=10 */
- rose_node->next = rose_node_list;
- rose_node_list = rose_node;
-
- rose_loopback_neigh->count++;
- rose_neigh_hold(rose_loopback_neigh);
-
-out:
- spin_unlock_bh(&rose_node_list_lock);
-
- return err;
-}
-
-/*
- * Delete a loopback node.
- */
-void rose_del_loopback_node(const rose_address *address)
-{
- struct rose_node *rose_node;
-
- spin_lock_bh(&rose_node_list_lock);
-
- rose_node = rose_node_list;
- while (rose_node != NULL) {
- if ((rose_node->mask == 10) &&
- (rosecmpm(address, &rose_node->address, 10) == 0) &&
- rose_node->loopback)
- break;
- rose_node = rose_node->next;
- }
-
- if (rose_node == NULL)
- goto out;
-
- rose_remove_node(rose_node);
-
- rose_loopback_neigh->count--;
- rose_neigh_put(rose_loopback_neigh);
-
-out:
- spin_unlock_bh(&rose_node_list_lock);
-}
-
-/*
- * A device has been removed. Remove its routes and neighbours.
- */
-void rose_rt_device_down(struct net_device *dev)
-{
- struct rose_neigh *s, *rose_neigh;
- struct rose_node *t, *rose_node;
- int i;
-
- spin_lock_bh(&rose_node_list_lock);
- spin_lock_bh(&rose_neigh_list_lock);
- rose_neigh = rose_neigh_list;
- while (rose_neigh != NULL) {
- s = rose_neigh;
- rose_neigh = rose_neigh->next;
-
- if (s->dev != dev)
- continue;
-
- rose_node = rose_node_list;
-
- while (rose_node != NULL) {
- t = rose_node;
- rose_node = rose_node->next;
-
- for (i = t->count - 1; i >= 0; i--) {
- if (t->neighbour[i] != s)
- continue;
-
- t->count--;
-
- memmove(&t->neighbour[i], &t->neighbour[i + 1],
- sizeof(t->neighbour[0]) *
- (t->count - i));
- rose_neigh_put(s);
- }
-
- if (t->count <= 0)
- rose_remove_node(t);
- }
-
- rose_remove_neigh(s);
- rose_neigh_put(s);
- }
- spin_unlock_bh(&rose_neigh_list_lock);
- spin_unlock_bh(&rose_node_list_lock);
-}
-
-#if 0 /* Currently unused */
-/*
- * A device has been removed. Remove its links.
- */
-void rose_route_device_down(struct net_device *dev)
-{
- struct rose_route *s, *rose_route;
-
- spin_lock_bh(&rose_route_list_lock);
- rose_route = rose_route_list;
- while (rose_route != NULL) {
- s = rose_route;
- rose_route = rose_route->next;
-
- if (s->neigh1->dev == dev || s->neigh2->dev == dev)
- rose_remove_route(s);
- }
- spin_unlock_bh(&rose_route_list_lock);
-}
-#endif
-
-/*
- * Clear all nodes and neighbours out, except for neighbours with
- * active connections going through them.
- * Do not clear loopback neighbour and nodes.
- */
-static int rose_clear_routes(void)
-{
- struct rose_neigh *s, *rose_neigh;
- struct rose_node *t, *rose_node;
- int i;
-
- spin_lock_bh(&rose_node_list_lock);
- spin_lock_bh(&rose_neigh_list_lock);
-
- rose_neigh = rose_neigh_list;
- rose_node = rose_node_list;
-
- while (rose_node != NULL) {
- t = rose_node;
- rose_node = rose_node->next;
-
- if (!t->loopback) {
- for (i = 0; i < t->count; i++)
- rose_neigh_put(t->neighbour[i]);
- rose_remove_node(t);
- }
- }
-
- while (rose_neigh != NULL) {
- s = rose_neigh;
- rose_neigh = rose_neigh->next;
-
- if (!s->loopback) {
- rose_remove_neigh(s);
- rose_neigh_put(s);
- }
- }
-
- spin_unlock_bh(&rose_neigh_list_lock);
- spin_unlock_bh(&rose_node_list_lock);
-
- return 0;
-}
-
-/*
- * Check that the device given is a valid AX.25 interface that is "up".
- * called with RTNL
- */
-static struct net_device *rose_ax25_dev_find(char *devname)
-{
- struct net_device *dev;
-
- if ((dev = __dev_get_by_name(&init_net, devname)) == NULL)
- return NULL;
-
- if ((dev->flags & IFF_UP) && dev->type == ARPHRD_AX25)
- return dev;
-
- return NULL;
-}
-
-/*
- * Find the first active ROSE device, usually "rose0".
- */
-struct net_device *rose_dev_first(void)
-{
- struct net_device *dev, *first = NULL;
-
- rcu_read_lock();
- for_each_netdev_rcu(&init_net, dev) {
- if ((dev->flags & IFF_UP) && dev->type == ARPHRD_ROSE)
- if (first == NULL || strncmp(dev->name, first->name, 3) < 0)
- first = dev;
- }
- if (first)
- dev_hold(first);
- rcu_read_unlock();
-
- return first;
-}
-
-/*
- * Find the ROSE device for the given address.
- */
-struct net_device *rose_dev_get(rose_address *addr)
-{
- struct net_device *dev;
-
- rcu_read_lock();
- for_each_netdev_rcu(&init_net, dev) {
- if ((dev->flags & IFF_UP) && dev->type == ARPHRD_ROSE &&
- rosecmp(addr, (const rose_address *)dev->dev_addr) == 0) {
- dev_hold(dev);
- goto out;
- }
- }
- dev = NULL;
-out:
- rcu_read_unlock();
- return dev;
-}
-
-static int rose_dev_exists(rose_address *addr)
-{
- struct net_device *dev;
-
- rcu_read_lock();
- for_each_netdev_rcu(&init_net, dev) {
- if ((dev->flags & IFF_UP) && dev->type == ARPHRD_ROSE &&
- rosecmp(addr, (const rose_address *)dev->dev_addr) == 0)
- goto out;
- }
- dev = NULL;
-out:
- rcu_read_unlock();
- return dev != NULL;
-}
-
-
-
-
-struct rose_route *rose_route_free_lci(unsigned int lci, struct rose_neigh *neigh)
-{
- struct rose_route *rose_route;
-
- for (rose_route = rose_route_list; rose_route != NULL; rose_route = rose_route->next)
- if ((rose_route->neigh1 == neigh && rose_route->lci1 == lci) ||
- (rose_route->neigh2 == neigh && rose_route->lci2 == lci))
- return rose_route;
-
- return NULL;
-}
-
-/*
- * Find a neighbour or a route given a ROSE address.
- */
-struct rose_neigh *rose_get_neigh(rose_address *addr, unsigned char *cause,
- unsigned char *diagnostic, int route_frame)
-{
- struct rose_neigh *res = NULL;
- struct rose_node *node;
- int failed = 0;
- int i;
-
- if (!route_frame) spin_lock_bh(&rose_node_list_lock);
- for (node = rose_node_list; node != NULL; node = node->next) {
- if (rosecmpm(addr, &node->address, node->mask) == 0) {
- for (i = 0; i < node->count; i++) {
- if (node->neighbour[i]->restarted) {
- res = node->neighbour[i];
- rose_neigh_hold(node->neighbour[i]);
- goto out;
- }
- }
- }
- }
- if (!route_frame) { /* connect request */
- for (node = rose_node_list; node != NULL; node = node->next) {
- if (rosecmpm(addr, &node->address, node->mask) == 0) {
- for (i = 0; i < node->count; i++) {
- if (!rose_ftimer_running(node->neighbour[i])) {
- res = node->neighbour[i];
- rose_neigh_hold(node->neighbour[i]);
- goto out;
- }
- failed = 1;
- }
- }
- }
- }
-
- if (failed) {
- *cause = ROSE_OUT_OF_ORDER;
- *diagnostic = 0;
- } else {
- *cause = ROSE_NOT_OBTAINABLE;
- *diagnostic = 0;
- }
-
-out:
- if (!route_frame) spin_unlock_bh(&rose_node_list_lock);
- return res;
-}
-
-/*
- * Handle the ioctls that control the routing functions.
- */
-int rose_rt_ioctl(unsigned int cmd, void __user *arg)
-{
- struct rose_route_struct rose_route;
- struct net_device *dev;
- int err;
-
- switch (cmd) {
- case SIOCADDRT:
- if (copy_from_user(&rose_route, arg, sizeof(struct rose_route_struct)))
- return -EFAULT;
- if ((dev = rose_ax25_dev_find(rose_route.device)) == NULL)
- return -EINVAL;
- if (rose_dev_exists(&rose_route.address)) /* Can't add routes to ourself */
- return -EINVAL;
- if (rose_route.mask > 10) /* Mask can't be more than 10 digits */
- return -EINVAL;
- if (rose_route.ndigis > AX25_MAX_DIGIS)
- return -EINVAL;
- err = rose_add_node(&rose_route, dev);
- return err;
-
- case SIOCDELRT:
- if (copy_from_user(&rose_route, arg, sizeof(struct rose_route_struct)))
- return -EFAULT;
- if ((dev = rose_ax25_dev_find(rose_route.device)) == NULL)
- return -EINVAL;
- err = rose_del_node(&rose_route, dev);
- return err;
-
- case SIOCRSCLRRT:
- return rose_clear_routes();
-
- default:
- return -EINVAL;
- }
-
- return 0;
-}
-
-static void rose_del_route_by_neigh(struct rose_neigh *rose_neigh)
-{
- struct rose_route *rose_route, *s;
-
- rose_neigh->restarted = 0;
-
- rose_stop_t0timer(rose_neigh);
- rose_start_ftimer(rose_neigh);
-
- skb_queue_purge(&rose_neigh->queue);
-
- spin_lock_bh(&rose_route_list_lock);
-
- rose_route = rose_route_list;
-
- while (rose_route != NULL) {
- if ((rose_route->neigh1 == rose_neigh && rose_route->neigh2 == rose_neigh) ||
- (rose_route->neigh1 == rose_neigh && rose_route->neigh2 == NULL) ||
- (rose_route->neigh2 == rose_neigh && rose_route->neigh1 == NULL)) {
- s = rose_route->next;
- rose_remove_route(rose_route);
- rose_route = s;
- continue;
- }
-
- if (rose_route->neigh1 == rose_neigh) {
- rose_neigh_put(rose_route->neigh1);
- rose_route->neigh1 = NULL;
- rose_transmit_clear_request(rose_route->neigh2, rose_route->lci2, ROSE_OUT_OF_ORDER, 0);
- }
-
- if (rose_route->neigh2 == rose_neigh) {
- rose_neigh_put(rose_route->neigh2);
- rose_route->neigh2 = NULL;
- rose_transmit_clear_request(rose_route->neigh1, rose_route->lci1, ROSE_OUT_OF_ORDER, 0);
- }
-
- rose_route = rose_route->next;
- }
- spin_unlock_bh(&rose_route_list_lock);
-}
-
-/*
- * A level 2 link has timed out, therefore it appears to be a poor link,
- * then don't use that neighbour until it is reset. Blow away all through
- * routes and connections using this route.
- */
-void rose_link_failed(ax25_cb *ax25, int reason)
-{
- struct rose_neigh *rose_neigh;
-
- spin_lock_bh(&rose_neigh_list_lock);
- rose_neigh = rose_neigh_list;
- while (rose_neigh != NULL) {
- if (rose_neigh->ax25 == ax25)
- break;
- rose_neigh = rose_neigh->next;
- }
-
- if (rose_neigh != NULL) {
- rose_neigh->ax25 = NULL;
- ax25_cb_put(ax25);
-
- rose_del_route_by_neigh(rose_neigh);
- rose_kill_by_neigh(rose_neigh);
- }
- spin_unlock_bh(&rose_neigh_list_lock);
-}
-
-/*
- * A device has been "downed" remove its link status. Blow away all
- * through routes and connections that use this device.
- */
-void rose_link_device_down(struct net_device *dev)
-{
- struct rose_neigh *rose_neigh;
-
- for (rose_neigh = rose_neigh_list; rose_neigh != NULL; rose_neigh = rose_neigh->next) {
- if (rose_neigh->dev == dev) {
- rose_del_route_by_neigh(rose_neigh);
- rose_kill_by_neigh(rose_neigh);
- }
- }
-}
-
-/*
- * Route a frame to an appropriate AX.25 connection.
- * A NULL ax25_cb indicates an internally generated frame.
- */
-int rose_route_frame(struct sk_buff *skb, ax25_cb *ax25)
-{
- struct rose_neigh *rose_neigh, *new_neigh;
- struct rose_route *rose_route;
- struct rose_facilities_struct facilities;
- rose_address *src_addr, *dest_addr;
- struct sock *sk;
- unsigned short frametype;
- unsigned int lci, new_lci;
- unsigned char cause, diagnostic;
- struct net_device *dev;
- int res = 0;
- char buf[11];
-
- if (skb->len < ROSE_MIN_LEN)
- return res;
-
- if (!ax25)
- return rose_loopback_queue(skb, NULL);
-
- frametype = skb->data[2];
- lci = ((skb->data[0] << 8) & 0xF00) + ((skb->data[1] << 0) & 0x0FF);
- if (frametype == ROSE_CALL_REQUEST &&
- (skb->len <= ROSE_CALL_REQ_FACILITIES_OFF ||
- skb->data[ROSE_CALL_REQ_ADDR_LEN_OFF] !=
- ROSE_CALL_REQ_ADDR_LEN_VAL))
- return res;
- src_addr = (rose_address *)(skb->data + ROSE_CALL_REQ_SRC_ADDR_OFF);
- dest_addr = (rose_address *)(skb->data + ROSE_CALL_REQ_DEST_ADDR_OFF);
-
- spin_lock_bh(&rose_neigh_list_lock);
- spin_lock_bh(&rose_route_list_lock);
-
- rose_neigh = rose_neigh_list;
- while (rose_neigh != NULL) {
- if (ax25cmp(&ax25->dest_addr, &rose_neigh->callsign) == 0 &&
- ax25->ax25_dev->dev == rose_neigh->dev)
- break;
- rose_neigh = rose_neigh->next;
- }
-
- if (rose_neigh == NULL) {
- printk("rose_route : unknown neighbour or device %s\n",
- ax2asc(buf, &ax25->dest_addr));
- goto out;
- }
-
- /*
- * Obviously the link is working, halt the ftimer.
- */
- rose_stop_ftimer(rose_neigh);
-
- /*
- * LCI of zero is always for us, and its always a restart
- * frame.
- */
- if (lci == 0) {
- rose_link_rx_restart(skb, rose_neigh, frametype);
- goto out;
- }
-
- /*
- * Find an existing socket.
- */
- if ((sk = rose_find_socket(lci, rose_neigh)) != NULL) {
- if (frametype == ROSE_CALL_REQUEST) {
- struct rose_sock *rose = rose_sk(sk);
-
- /* Remove an existing unused socket */
- rose_clear_queues(sk);
- rose->cause = ROSE_NETWORK_CONGESTION;
- rose->diagnostic = 0;
- rose_neigh_put(rose->neighbour);
- rose->neighbour = NULL;
- rose->lci = 0;
- rose->state = ROSE_STATE_0;
- sk->sk_state = TCP_CLOSE;
- sk->sk_err = 0;
- sk->sk_shutdown |= SEND_SHUTDOWN;
- if (!sock_flag(sk, SOCK_DEAD)) {
- sk->sk_state_change(sk);
- sock_set_flag(sk, SOCK_DEAD);
- }
- }
- else {
- skb_reset_transport_header(skb);
- res = rose_process_rx_frame(sk, skb);
- goto out;
- }
- }
-
- /*
- * Is is a Call Request and is it for us ?
- */
- if (frametype == ROSE_CALL_REQUEST)
- if ((dev = rose_dev_get(dest_addr)) != NULL) {
- res = rose_rx_call_request(skb, dev, rose_neigh, lci);
- dev_put(dev);
- goto out;
- }
-
- if (!sysctl_rose_routing_control) {
- rose_transmit_clear_request(rose_neigh, lci, ROSE_NOT_OBTAINABLE, 0);
- goto out;
- }
-
- /*
- * Route it to the next in line if we have an entry for it.
- */
- rose_route = rose_route_list;
- while (rose_route != NULL) {
- if (rose_route->lci1 == lci &&
- rose_route->neigh1 == rose_neigh) {
- if (frametype == ROSE_CALL_REQUEST) {
- /* F6FBB - Remove an existing unused route */
- rose_remove_route(rose_route);
- break;
- } else if (rose_route->neigh2 != NULL) {
- skb->data[0] &= 0xF0;
- skb->data[0] |= (rose_route->lci2 >> 8) & 0x0F;
- skb->data[1] = (rose_route->lci2 >> 0) & 0xFF;
- rose_transmit_link(skb, rose_route->neigh2);
- if (frametype == ROSE_CLEAR_CONFIRMATION)
- rose_remove_route(rose_route);
- res = 1;
- goto out;
- } else {
- if (frametype == ROSE_CLEAR_CONFIRMATION)
- rose_remove_route(rose_route);
- goto out;
- }
- }
- if (rose_route->lci2 == lci &&
- rose_route->neigh2 == rose_neigh) {
- if (frametype == ROSE_CALL_REQUEST) {
- /* F6FBB - Remove an existing unused route */
- rose_remove_route(rose_route);
- break;
- } else if (rose_route->neigh1 != NULL) {
- skb->data[0] &= 0xF0;
- skb->data[0] |= (rose_route->lci1 >> 8) & 0x0F;
- skb->data[1] = (rose_route->lci1 >> 0) & 0xFF;
- rose_transmit_link(skb, rose_route->neigh1);
- if (frametype == ROSE_CLEAR_CONFIRMATION)
- rose_remove_route(rose_route);
- res = 1;
- goto out;
- } else {
- if (frametype == ROSE_CLEAR_CONFIRMATION)
- rose_remove_route(rose_route);
- goto out;
- }
- }
- rose_route = rose_route->next;
- }
-
- /*
- * We know that:
- * 1. The frame isn't for us,
- * 2. It isn't "owned" by any existing route.
- */
- if (frametype != ROSE_CALL_REQUEST) { /* XXX */
- res = 0;
- goto out;
- }
-
- memset(&facilities, 0x00, sizeof(struct rose_facilities_struct));
-
- if (!rose_parse_facilities(skb->data + ROSE_CALL_REQ_FACILITIES_OFF,
- skb->len - ROSE_CALL_REQ_FACILITIES_OFF,
- &facilities)) {
- rose_transmit_clear_request(rose_neigh, lci, ROSE_INVALID_FACILITY, 76);
- goto out;
- }
-
- /*
- * Check for routing loops.
- */
- rose_route = rose_route_list;
- while (rose_route != NULL) {
- if (rose_route->rand == facilities.rand &&
- rosecmp(src_addr, &rose_route->src_addr) == 0 &&
- ax25cmp(&facilities.dest_call, &rose_route->src_call) == 0 &&
- ax25cmp(&facilities.source_call, &rose_route->dest_call) == 0) {
- rose_transmit_clear_request(rose_neigh, lci, ROSE_NOT_OBTAINABLE, 120);
- goto out;
- }
- rose_route = rose_route->next;
- }
-
- if ((new_neigh = rose_get_neigh(dest_addr, &cause, &diagnostic, 1)) == NULL) {
- rose_transmit_clear_request(rose_neigh, lci, cause, diagnostic);
- goto out;
- }
-
- if ((new_lci = rose_new_lci(new_neigh)) == 0) {
- rose_transmit_clear_request(rose_neigh, lci, ROSE_NETWORK_CONGESTION, 71);
- goto put_neigh;
- }
-
- if ((rose_route = kmalloc_obj(*rose_route, GFP_ATOMIC)) == NULL) {
- rose_transmit_clear_request(rose_neigh, lci, ROSE_NETWORK_CONGESTION, 120);
- goto put_neigh;
- }
-
- rose_route->lci1 = lci;
- rose_route->src_addr = *src_addr;
- rose_route->dest_addr = *dest_addr;
- rose_route->src_call = facilities.dest_call;
- rose_route->dest_call = facilities.source_call;
- rose_route->rand = facilities.rand;
- rose_route->neigh1 = rose_neigh;
- rose_route->lci2 = new_lci;
- rose_route->neigh2 = new_neigh;
-
- rose_neigh_hold(rose_route->neigh1);
- rose_neigh_hold(rose_route->neigh2);
-
- rose_route->next = rose_route_list;
- rose_route_list = rose_route;
-
- skb->data[0] &= 0xF0;
- skb->data[0] |= (rose_route->lci2 >> 8) & 0x0F;
- skb->data[1] = (rose_route->lci2 >> 0) & 0xFF;
-
- rose_transmit_link(skb, rose_route->neigh2);
- res = 1;
-
-put_neigh:
- rose_neigh_put(new_neigh);
-out:
- spin_unlock_bh(&rose_route_list_lock);
- spin_unlock_bh(&rose_neigh_list_lock);
-
- return res;
-}
-
-#ifdef CONFIG_PROC_FS
-
-static void *rose_node_start(struct seq_file *seq, loff_t *pos)
- __acquires(rose_node_list_lock)
-{
- struct rose_node *rose_node;
- int i = 1;
-
- spin_lock_bh(&rose_node_list_lock);
- if (*pos == 0)
- return SEQ_START_TOKEN;
-
- for (rose_node = rose_node_list; rose_node && i < *pos;
- rose_node = rose_node->next, ++i);
-
- return (i == *pos) ? rose_node : NULL;
-}
-
-static void *rose_node_next(struct seq_file *seq, void *v, loff_t *pos)
-{
- ++*pos;
-
- return (v == SEQ_START_TOKEN) ? rose_node_list
- : ((struct rose_node *)v)->next;
-}
-
-static void rose_node_stop(struct seq_file *seq, void *v)
- __releases(rose_node_list_lock)
-{
- spin_unlock_bh(&rose_node_list_lock);
-}
-
-static int rose_node_show(struct seq_file *seq, void *v)
-{
- char rsbuf[11];
- int i;
-
- if (v == SEQ_START_TOKEN)
- seq_puts(seq, "address mask n neigh neigh neigh\n");
- else {
- const struct rose_node *rose_node = v;
- seq_printf(seq, "%-10s %04d %d",
- rose2asc(rsbuf, &rose_node->address),
- rose_node->mask,
- rose_node->count);
-
- for (i = 0; i < rose_node->count; i++)
- seq_printf(seq, " %05d", rose_node->neighbour[i]->number);
-
- seq_puts(seq, "\n");
- }
- return 0;
-}
-
-const struct seq_operations rose_node_seqops = {
- .start = rose_node_start,
- .next = rose_node_next,
- .stop = rose_node_stop,
- .show = rose_node_show,
-};
-
-static void *rose_neigh_start(struct seq_file *seq, loff_t *pos)
- __acquires(rose_neigh_list_lock)
-{
- struct rose_neigh *rose_neigh;
- int i = 1;
-
- spin_lock_bh(&rose_neigh_list_lock);
- if (*pos == 0)
- return SEQ_START_TOKEN;
-
- for (rose_neigh = rose_neigh_list; rose_neigh && i < *pos;
- rose_neigh = rose_neigh->next, ++i);
-
- return (i == *pos) ? rose_neigh : NULL;
-}
-
-static void *rose_neigh_next(struct seq_file *seq, void *v, loff_t *pos)
-{
- ++*pos;
-
- return (v == SEQ_START_TOKEN) ? rose_neigh_list
- : ((struct rose_neigh *)v)->next;
-}
-
-static void rose_neigh_stop(struct seq_file *seq, void *v)
- __releases(rose_neigh_list_lock)
-{
- spin_unlock_bh(&rose_neigh_list_lock);
-}
-
-static int rose_neigh_show(struct seq_file *seq, void *v)
-{
- char buf[11];
- int i;
-
- if (v == SEQ_START_TOKEN)
- seq_puts(seq,
- "addr callsign dev count use mode restart t0 tf digipeaters\n");
- else {
- struct rose_neigh *rose_neigh = v;
-
- /* if (!rose_neigh->loopback) { */
- seq_printf(seq, "%05d %-9s %-4s %3d %3d %3s %3s %3lu %3lu",
- rose_neigh->number,
- (rose_neigh->loopback) ? "RSLOOP-0" : ax2asc(buf, &rose_neigh->callsign),
- rose_neigh->dev ? rose_neigh->dev->name : "???",
- rose_neigh->count,
- refcount_read(&rose_neigh->use) - rose_neigh->count - 1,
- (rose_neigh->dce_mode) ? "DCE" : "DTE",
- (rose_neigh->restarted) ? "yes" : "no",
- ax25_display_timer(&rose_neigh->t0timer) / HZ,
- ax25_display_timer(&rose_neigh->ftimer) / HZ);
-
- if (rose_neigh->digipeat != NULL) {
- for (i = 0; i < rose_neigh->digipeat->ndigi; i++)
- seq_printf(seq, " %s", ax2asc(buf, &rose_neigh->digipeat->calls[i]));
- }
-
- seq_puts(seq, "\n");
- }
- return 0;
-}
-
-
-const struct seq_operations rose_neigh_seqops = {
- .start = rose_neigh_start,
- .next = rose_neigh_next,
- .stop = rose_neigh_stop,
- .show = rose_neigh_show,
-};
-
-static void *rose_route_start(struct seq_file *seq, loff_t *pos)
- __acquires(rose_route_list_lock)
-{
- struct rose_route *rose_route;
- int i = 1;
-
- spin_lock_bh(&rose_route_list_lock);
- if (*pos == 0)
- return SEQ_START_TOKEN;
-
- for (rose_route = rose_route_list; rose_route && i < *pos;
- rose_route = rose_route->next, ++i);
-
- return (i == *pos) ? rose_route : NULL;
-}
-
-static void *rose_route_next(struct seq_file *seq, void *v, loff_t *pos)
-{
- ++*pos;
-
- return (v == SEQ_START_TOKEN) ? rose_route_list
- : ((struct rose_route *)v)->next;
-}
-
-static void rose_route_stop(struct seq_file *seq, void *v)
- __releases(rose_route_list_lock)
-{
- spin_unlock_bh(&rose_route_list_lock);
-}
-
-static int rose_route_show(struct seq_file *seq, void *v)
-{
- char buf[11], rsbuf[11];
-
- if (v == SEQ_START_TOKEN)
- seq_puts(seq,
- "lci address callsign neigh <-> lci address callsign neigh\n");
- else {
- struct rose_route *rose_route = v;
-
- if (rose_route->neigh1)
- seq_printf(seq,
- "%3.3X %-10s %-9s %05d ",
- rose_route->lci1,
- rose2asc(rsbuf, &rose_route->src_addr),
- ax2asc(buf, &rose_route->src_call),
- rose_route->neigh1->number);
- else
- seq_puts(seq,
- "000 * * 00000 ");
-
- if (rose_route->neigh2)
- seq_printf(seq,
- "%3.3X %-10s %-9s %05d\n",
- rose_route->lci2,
- rose2asc(rsbuf, &rose_route->dest_addr),
- ax2asc(buf, &rose_route->dest_call),
- rose_route->neigh2->number);
- else
- seq_puts(seq,
- "000 * * 00000\n");
- }
- return 0;
-}
-
-struct seq_operations rose_route_seqops = {
- .start = rose_route_start,
- .next = rose_route_next,
- .stop = rose_route_stop,
- .show = rose_route_show,
-};
-#endif /* CONFIG_PROC_FS */
-
-/*
- * Release all memory associated with ROSE routing structures.
- */
-void __exit rose_rt_free(void)
-{
- struct rose_neigh *s, *rose_neigh = rose_neigh_list;
- struct rose_node *t, *rose_node = rose_node_list;
- struct rose_route *u, *rose_route = rose_route_list;
- int i;
-
- while (rose_neigh != NULL) {
- s = rose_neigh;
- rose_neigh = rose_neigh->next;
-
- rose_remove_neigh(s);
- rose_neigh_put(s);
- }
-
- while (rose_node != NULL) {
- t = rose_node;
- rose_node = rose_node->next;
-
- for (i = 0; i < t->count; i++)
- rose_neigh_put(t->neighbour[i]);
- rose_remove_node(t);
- }
-
- while (rose_route != NULL) {
- u = rose_route;
- rose_route = rose_route->next;
-
- rose_remove_route(u);
- }
-}
+++ /dev/null
-// SPDX-License-Identifier: GPL-2.0-or-later
-/*
- *
- * Copyright (C) Jonathan Naylor G4KLX (g4klx@g4klx.demon.co.uk)
- */
-#include <linux/errno.h>
-#include <linux/types.h>
-#include <linux/socket.h>
-#include <linux/in.h>
-#include <linux/kernel.h>
-#include <linux/timer.h>
-#include <linux/string.h>
-#include <linux/sockios.h>
-#include <linux/net.h>
-#include <linux/slab.h>
-#include <net/ax25.h>
-#include <linux/inet.h>
-#include <linux/netdevice.h>
-#include <linux/skbuff.h>
-#include <net/sock.h>
-#include <net/tcp_states.h>
-#include <linux/fcntl.h>
-#include <linux/mm.h>
-#include <linux/interrupt.h>
-#include <net/rose.h>
-
-static int rose_create_facilities(unsigned char *buffer, struct rose_sock *rose);
-
-/*
- * This routine purges all of the queues of frames.
- */
-void rose_clear_queues(struct sock *sk)
-{
- skb_queue_purge(&sk->sk_write_queue);
- skb_queue_purge(&rose_sk(sk)->ack_queue);
-}
-
-/*
- * This routine purges the input queue of those frames that have been
- * acknowledged. This replaces the boxes labelled "V(a) <- N(r)" on the
- * SDL diagram.
- */
-void rose_frames_acked(struct sock *sk, unsigned short nr)
-{
- struct sk_buff *skb;
- struct rose_sock *rose = rose_sk(sk);
-
- /*
- * Remove all the ack-ed frames from the ack queue.
- */
- if (rose->va != nr) {
- while (skb_peek(&rose->ack_queue) != NULL && rose->va != nr) {
- skb = skb_dequeue(&rose->ack_queue);
- kfree_skb(skb);
- rose->va = (rose->va + 1) % ROSE_MODULUS;
- }
- }
-}
-
-void rose_requeue_frames(struct sock *sk)
-{
- struct sk_buff *skb, *skb_prev = NULL;
-
- /*
- * Requeue all the un-ack-ed frames on the output queue to be picked
- * up by rose_kick. This arrangement handles the possibility of an
- * empty output queue.
- */
- while ((skb = skb_dequeue(&rose_sk(sk)->ack_queue)) != NULL) {
- if (skb_prev == NULL)
- skb_queue_head(&sk->sk_write_queue, skb);
- else
- skb_append(skb_prev, skb, &sk->sk_write_queue);
- skb_prev = skb;
- }
-}
-
-/*
- * Validate that the value of nr is between va and vs. Return true or
- * false for testing.
- */
-int rose_validate_nr(struct sock *sk, unsigned short nr)
-{
- struct rose_sock *rose = rose_sk(sk);
- unsigned short vc = rose->va;
-
- while (vc != rose->vs) {
- if (nr == vc) return 1;
- vc = (vc + 1) % ROSE_MODULUS;
- }
-
- return nr == rose->vs;
-}
-
-/*
- * This routine is called when the packet layer internally generates a
- * control frame.
- */
-void rose_write_internal(struct sock *sk, int frametype)
-{
- struct rose_sock *rose = rose_sk(sk);
- struct sk_buff *skb;
- unsigned char *dptr;
- unsigned char lci1, lci2;
- int maxfaclen = 0;
- int len, faclen;
- int reserve;
-
- reserve = AX25_BPQ_HEADER_LEN + AX25_MAX_HEADER_LEN + 1;
- len = ROSE_MIN_LEN;
-
- switch (frametype) {
- case ROSE_CALL_REQUEST:
- len += 1 + ROSE_ADDR_LEN + ROSE_ADDR_LEN;
- maxfaclen = 256;
- break;
- case ROSE_CALL_ACCEPTED:
- case ROSE_CLEAR_REQUEST:
- case ROSE_RESET_REQUEST:
- len += 2;
- break;
- }
-
- skb = alloc_skb(reserve + len + maxfaclen, GFP_ATOMIC);
- if (!skb)
- return;
-
- /*
- * Space for AX.25 header and PID.
- */
- skb_reserve(skb, reserve);
-
- dptr = skb_put(skb, len);
-
- lci1 = (rose->lci >> 8) & 0x0F;
- lci2 = (rose->lci >> 0) & 0xFF;
-
- switch (frametype) {
- case ROSE_CALL_REQUEST:
- *dptr++ = ROSE_GFI | lci1;
- *dptr++ = lci2;
- *dptr++ = frametype;
- *dptr++ = ROSE_CALL_REQ_ADDR_LEN_VAL;
- memcpy(dptr, &rose->dest_addr, ROSE_ADDR_LEN);
- dptr += ROSE_ADDR_LEN;
- memcpy(dptr, &rose->source_addr, ROSE_ADDR_LEN);
- dptr += ROSE_ADDR_LEN;
- faclen = rose_create_facilities(dptr, rose);
- skb_put(skb, faclen);
- dptr += faclen;
- break;
-
- case ROSE_CALL_ACCEPTED:
- *dptr++ = ROSE_GFI | lci1;
- *dptr++ = lci2;
- *dptr++ = frametype;
- *dptr++ = 0x00; /* Address length */
- *dptr++ = 0; /* Facilities length */
- break;
-
- case ROSE_CLEAR_REQUEST:
- *dptr++ = ROSE_GFI | lci1;
- *dptr++ = lci2;
- *dptr++ = frametype;
- *dptr++ = rose->cause;
- *dptr++ = rose->diagnostic;
- break;
-
- case ROSE_RESET_REQUEST:
- *dptr++ = ROSE_GFI | lci1;
- *dptr++ = lci2;
- *dptr++ = frametype;
- *dptr++ = ROSE_DTE_ORIGINATED;
- *dptr++ = 0;
- break;
-
- case ROSE_RR:
- case ROSE_RNR:
- *dptr++ = ROSE_GFI | lci1;
- *dptr++ = lci2;
- *dptr = frametype;
- *dptr++ |= (rose->vr << 5) & 0xE0;
- break;
-
- case ROSE_CLEAR_CONFIRMATION:
- case ROSE_RESET_CONFIRMATION:
- *dptr++ = ROSE_GFI | lci1;
- *dptr++ = lci2;
- *dptr++ = frametype;
- break;
-
- default:
- printk(KERN_ERR "ROSE: rose_write_internal - invalid frametype %02X\n", frametype);
- kfree_skb(skb);
- return;
- }
-
- rose_transmit_link(skb, rose->neighbour);
-}
-
-int rose_decode(struct sk_buff *skb, int *ns, int *nr, int *q, int *d, int *m)
-{
- unsigned char *frame;
-
- frame = skb->data;
-
- *ns = *nr = *q = *d = *m = 0;
-
- switch (frame[2]) {
- case ROSE_CALL_REQUEST:
- case ROSE_CALL_ACCEPTED:
- case ROSE_CLEAR_REQUEST:
- case ROSE_CLEAR_CONFIRMATION:
- case ROSE_RESET_REQUEST:
- case ROSE_RESET_CONFIRMATION:
- return frame[2];
- default:
- break;
- }
-
- if ((frame[2] & 0x1F) == ROSE_RR ||
- (frame[2] & 0x1F) == ROSE_RNR) {
- *nr = (frame[2] >> 5) & 0x07;
- return frame[2] & 0x1F;
- }
-
- if ((frame[2] & 0x01) == ROSE_DATA) {
- *q = (frame[0] & ROSE_Q_BIT) == ROSE_Q_BIT;
- *d = (frame[0] & ROSE_D_BIT) == ROSE_D_BIT;
- *m = (frame[2] & ROSE_M_BIT) == ROSE_M_BIT;
- *nr = (frame[2] >> 5) & 0x07;
- *ns = (frame[2] >> 1) & 0x07;
- return ROSE_DATA;
- }
-
- return ROSE_ILLEGAL;
-}
-
-static int rose_parse_national(unsigned char *p, struct rose_facilities_struct *facilities, int len)
-{
- unsigned char *pt;
- unsigned char l, lg, n = 0;
- int fac_national_digis_received = 0;
-
- do {
- switch (*p & 0xC0) {
- case 0x00:
- if (len < 2)
- return -1;
- p += 2;
- n += 2;
- len -= 2;
- break;
-
- case 0x40:
- if (len < 3)
- return -1;
- if (*p == FAC_NATIONAL_RAND)
- facilities->rand = ((p[1] << 8) & 0xFF00) + ((p[2] << 0) & 0x00FF);
- p += 3;
- n += 3;
- len -= 3;
- break;
-
- case 0x80:
- if (len < 4)
- return -1;
- p += 4;
- n += 4;
- len -= 4;
- break;
-
- case 0xC0:
- if (len < 2)
- return -1;
- l = p[1];
- if (len < 2 + l)
- return -1;
- if (*p == FAC_NATIONAL_DEST_DIGI) {
- if (!fac_national_digis_received) {
- if (l < AX25_ADDR_LEN)
- return -1;
- memcpy(&facilities->source_digis[0], p + 2, AX25_ADDR_LEN);
- facilities->source_ndigis = 1;
- }
- }
- else if (*p == FAC_NATIONAL_SRC_DIGI) {
- if (!fac_national_digis_received) {
- if (l < AX25_ADDR_LEN)
- return -1;
- memcpy(&facilities->dest_digis[0], p + 2, AX25_ADDR_LEN);
- facilities->dest_ndigis = 1;
- }
- }
- else if (*p == FAC_NATIONAL_FAIL_CALL) {
- if (l < AX25_ADDR_LEN)
- return -1;
- memcpy(&facilities->fail_call, p + 2, AX25_ADDR_LEN);
- }
- else if (*p == FAC_NATIONAL_FAIL_ADD) {
- if (l < 1 + ROSE_ADDR_LEN)
- return -1;
- memcpy(&facilities->fail_addr, p + 3, ROSE_ADDR_LEN);
- }
- else if (*p == FAC_NATIONAL_DIGIS) {
- if (l % AX25_ADDR_LEN)
- return -1;
- fac_national_digis_received = 1;
- facilities->source_ndigis = 0;
- facilities->dest_ndigis = 0;
- for (pt = p + 2, lg = 0 ; lg < l ; pt += AX25_ADDR_LEN, lg += AX25_ADDR_LEN) {
- if (pt[6] & AX25_HBIT) {
- if (facilities->dest_ndigis >= ROSE_MAX_DIGIS)
- return -1;
- memcpy(&facilities->dest_digis[facilities->dest_ndigis++], pt, AX25_ADDR_LEN);
- } else {
- if (facilities->source_ndigis >= ROSE_MAX_DIGIS)
- return -1;
- memcpy(&facilities->source_digis[facilities->source_ndigis++], pt, AX25_ADDR_LEN);
- }
- }
- }
- p += l + 2;
- n += l + 2;
- len -= l + 2;
- break;
- }
- } while (*p != 0x00 && len > 0);
-
- return n;
-}
-
-static int rose_parse_ccitt(unsigned char *p, struct rose_facilities_struct *facilities, int len)
-{
- unsigned char l, n = 0;
- char callsign[11];
-
- do {
- switch (*p & 0xC0) {
- case 0x00:
- if (len < 2)
- return -1;
- p += 2;
- n += 2;
- len -= 2;
- break;
-
- case 0x40:
- if (len < 3)
- return -1;
- p += 3;
- n += 3;
- len -= 3;
- break;
-
- case 0x80:
- if (len < 4)
- return -1;
- p += 4;
- n += 4;
- len -= 4;
- break;
-
- case 0xC0:
- if (len < 2)
- return -1;
- l = p[1];
-
- /* Prevent overflows*/
- if (l < 10 || l > 20)
- return -1;
-
- if (*p == FAC_CCITT_DEST_NSAP) {
- memcpy(&facilities->source_addr, p + 7, ROSE_ADDR_LEN);
- memcpy(callsign, p + 12, l - 10);
- callsign[l - 10] = '\0';
- asc2ax(&facilities->source_call, callsign);
- }
- if (*p == FAC_CCITT_SRC_NSAP) {
- memcpy(&facilities->dest_addr, p + 7, ROSE_ADDR_LEN);
- memcpy(callsign, p + 12, l - 10);
- callsign[l - 10] = '\0';
- asc2ax(&facilities->dest_call, callsign);
- }
- p += l + 2;
- n += l + 2;
- len -= l + 2;
- break;
- }
- } while (*p != 0x00 && len > 0);
-
- return n;
-}
-
-int rose_parse_facilities(unsigned char *p, unsigned packet_len,
- struct rose_facilities_struct *facilities)
-{
- int facilities_len, len;
-
- facilities_len = *p++;
-
- if (facilities_len == 0 || (unsigned int)facilities_len > packet_len)
- return 0;
-
- while (facilities_len >= 3 && *p == 0x00) {
- facilities_len--;
- p++;
-
- switch (*p) {
- case FAC_NATIONAL: /* National */
- len = rose_parse_national(p + 1, facilities, facilities_len - 1);
- break;
-
- case FAC_CCITT: /* CCITT */
- len = rose_parse_ccitt(p + 1, facilities, facilities_len - 1);
- break;
-
- default:
- printk(KERN_DEBUG "ROSE: rose_parse_facilities - unknown facilities family %02X\n", *p);
- len = 1;
- break;
- }
-
- if (len < 0)
- return 0;
- if (WARN_ON(len >= facilities_len))
- return 0;
- facilities_len -= len + 1;
- p += len + 1;
- }
-
- return facilities_len == 0;
-}
-
-static int rose_create_facilities(unsigned char *buffer, struct rose_sock *rose)
-{
- unsigned char *p = buffer + 1;
- char *callsign;
- char buf[11];
- int len, nb;
-
- /* National Facilities */
- if (rose->rand != 0 || rose->source_ndigis == 1 || rose->dest_ndigis == 1) {
- *p++ = 0x00;
- *p++ = FAC_NATIONAL;
-
- if (rose->rand != 0) {
- *p++ = FAC_NATIONAL_RAND;
- *p++ = (rose->rand >> 8) & 0xFF;
- *p++ = (rose->rand >> 0) & 0xFF;
- }
-
- /* Sent before older facilities */
- if ((rose->source_ndigis > 0) || (rose->dest_ndigis > 0)) {
- int maxdigi = 0;
- *p++ = FAC_NATIONAL_DIGIS;
- *p++ = AX25_ADDR_LEN * (rose->source_ndigis + rose->dest_ndigis);
- for (nb = 0 ; nb < rose->source_ndigis ; nb++) {
- if (++maxdigi >= ROSE_MAX_DIGIS)
- break;
- memcpy(p, &rose->source_digis[nb], AX25_ADDR_LEN);
- p[6] |= AX25_HBIT;
- p += AX25_ADDR_LEN;
- }
- for (nb = 0 ; nb < rose->dest_ndigis ; nb++) {
- if (++maxdigi >= ROSE_MAX_DIGIS)
- break;
- memcpy(p, &rose->dest_digis[nb], AX25_ADDR_LEN);
- p[6] &= ~AX25_HBIT;
- p += AX25_ADDR_LEN;
- }
- }
-
- /* For compatibility */
- if (rose->source_ndigis > 0) {
- *p++ = FAC_NATIONAL_SRC_DIGI;
- *p++ = AX25_ADDR_LEN;
- memcpy(p, &rose->source_digis[0], AX25_ADDR_LEN);
- p += AX25_ADDR_LEN;
- }
-
- /* For compatibility */
- if (rose->dest_ndigis > 0) {
- *p++ = FAC_NATIONAL_DEST_DIGI;
- *p++ = AX25_ADDR_LEN;
- memcpy(p, &rose->dest_digis[0], AX25_ADDR_LEN);
- p += AX25_ADDR_LEN;
- }
- }
-
- *p++ = 0x00;
- *p++ = FAC_CCITT;
-
- *p++ = FAC_CCITT_DEST_NSAP;
-
- callsign = ax2asc(buf, &rose->dest_call);
-
- *p++ = strlen(callsign) + 10;
- *p++ = (strlen(callsign) + 9) * 2; /* ??? */
-
- *p++ = 0x47; *p++ = 0x00; *p++ = 0x11;
- *p++ = ROSE_ADDR_LEN * 2;
- memcpy(p, &rose->dest_addr, ROSE_ADDR_LEN);
- p += ROSE_ADDR_LEN;
-
- memcpy(p, callsign, strlen(callsign));
- p += strlen(callsign);
-
- *p++ = FAC_CCITT_SRC_NSAP;
-
- callsign = ax2asc(buf, &rose->source_call);
-
- *p++ = strlen(callsign) + 10;
- *p++ = (strlen(callsign) + 9) * 2; /* ??? */
-
- *p++ = 0x47; *p++ = 0x00; *p++ = 0x11;
- *p++ = ROSE_ADDR_LEN * 2;
- memcpy(p, &rose->source_addr, ROSE_ADDR_LEN);
- p += ROSE_ADDR_LEN;
-
- memcpy(p, callsign, strlen(callsign));
- p += strlen(callsign);
-
- len = p - buffer;
- buffer[0] = len - 1;
-
- return len;
-}
-
-void rose_disconnect(struct sock *sk, int reason, int cause, int diagnostic)
-{
- struct rose_sock *rose = rose_sk(sk);
-
- rose_stop_timer(sk);
- rose_stop_idletimer(sk);
-
- rose_clear_queues(sk);
-
- rose->lci = 0;
- rose->state = ROSE_STATE_0;
-
- if (cause != -1)
- rose->cause = cause;
-
- if (diagnostic != -1)
- rose->diagnostic = diagnostic;
-
- sk->sk_state = TCP_CLOSE;
- sk->sk_err = reason;
- sk->sk_shutdown |= SEND_SHUTDOWN;
-
- if (!sock_flag(sk, SOCK_DEAD)) {
- sk->sk_state_change(sk);
- sock_set_flag(sk, SOCK_DEAD);
- }
-}
+++ /dev/null
-// SPDX-License-Identifier: GPL-2.0-or-later
-/*
- *
- * Copyright (C) Jonathan Naylor G4KLX (g4klx@g4klx.demon.co.uk)
- * Copyright (C) 2002 Ralf Baechle DO1GRB (ralf@gnu.org)
- */
-#include <linux/errno.h>
-#include <linux/types.h>
-#include <linux/socket.h>
-#include <linux/in.h>
-#include <linux/kernel.h>
-#include <linux/jiffies.h>
-#include <linux/timer.h>
-#include <linux/string.h>
-#include <linux/sockios.h>
-#include <linux/net.h>
-#include <net/ax25.h>
-#include <linux/inet.h>
-#include <linux/netdevice.h>
-#include <linux/skbuff.h>
-#include <net/sock.h>
-#include <net/tcp_states.h>
-#include <linux/fcntl.h>
-#include <linux/mm.h>
-#include <linux/interrupt.h>
-#include <net/rose.h>
-
-static void rose_heartbeat_expiry(struct timer_list *t);
-static void rose_timer_expiry(struct timer_list *);
-static void rose_idletimer_expiry(struct timer_list *);
-
-void rose_start_heartbeat(struct sock *sk)
-{
- sk_stop_timer(sk, &sk->sk_timer);
-
- sk->sk_timer.function = rose_heartbeat_expiry;
- sk->sk_timer.expires = jiffies + 5 * HZ;
-
- sk_reset_timer(sk, &sk->sk_timer, sk->sk_timer.expires);
-}
-
-void rose_start_t1timer(struct sock *sk)
-{
- struct rose_sock *rose = rose_sk(sk);
-
- sk_stop_timer(sk, &rose->timer);
-
- rose->timer.function = rose_timer_expiry;
- rose->timer.expires = jiffies + rose->t1;
-
- sk_reset_timer(sk, &rose->timer, rose->timer.expires);
-}
-
-void rose_start_t2timer(struct sock *sk)
-{
- struct rose_sock *rose = rose_sk(sk);
-
- sk_stop_timer(sk, &rose->timer);
-
- rose->timer.function = rose_timer_expiry;
- rose->timer.expires = jiffies + rose->t2;
-
- sk_reset_timer(sk, &rose->timer, rose->timer.expires);
-}
-
-void rose_start_t3timer(struct sock *sk)
-{
- struct rose_sock *rose = rose_sk(sk);
-
- sk_stop_timer(sk, &rose->timer);
-
- rose->timer.function = rose_timer_expiry;
- rose->timer.expires = jiffies + rose->t3;
-
- sk_reset_timer(sk, &rose->timer, rose->timer.expires);
-}
-
-void rose_start_hbtimer(struct sock *sk)
-{
- struct rose_sock *rose = rose_sk(sk);
-
- sk_stop_timer(sk, &rose->timer);
-
- rose->timer.function = rose_timer_expiry;
- rose->timer.expires = jiffies + rose->hb;
-
- sk_reset_timer(sk, &rose->timer, rose->timer.expires);
-}
-
-void rose_start_idletimer(struct sock *sk)
-{
- struct rose_sock *rose = rose_sk(sk);
-
- sk_stop_timer(sk, &rose->idletimer);
-
- if (rose->idle > 0) {
- rose->idletimer.function = rose_idletimer_expiry;
- rose->idletimer.expires = jiffies + rose->idle;
-
- sk_reset_timer(sk, &rose->idletimer, rose->idletimer.expires);
- }
-}
-
-void rose_stop_heartbeat(struct sock *sk)
-{
- sk_stop_timer(sk, &sk->sk_timer);
-}
-
-void rose_stop_timer(struct sock *sk)
-{
- sk_stop_timer(sk, &rose_sk(sk)->timer);
-}
-
-void rose_stop_idletimer(struct sock *sk)
-{
- sk_stop_timer(sk, &rose_sk(sk)->idletimer);
-}
-
-static void rose_heartbeat_expiry(struct timer_list *t)
-{
- struct sock *sk = timer_container_of(sk, t, sk_timer);
- struct rose_sock *rose = rose_sk(sk);
-
- bh_lock_sock(sk);
- if (sock_owned_by_user(sk)) {
- sk_reset_timer(sk, &sk->sk_timer, jiffies + HZ/20);
- goto out;
- }
- switch (rose->state) {
- case ROSE_STATE_0:
- /* Magic here: If we listen() and a new link dies before it
- is accepted() it isn't 'dead' so doesn't get removed. */
- if (sock_flag(sk, SOCK_DESTROY) ||
- (sk->sk_state == TCP_LISTEN && sock_flag(sk, SOCK_DEAD))) {
- bh_unlock_sock(sk);
- rose_destroy_socket(sk);
- sock_put(sk);
- return;
- }
- break;
-
- case ROSE_STATE_3:
- /*
- * Check for the state of the receive buffer.
- */
- if (atomic_read(&sk->sk_rmem_alloc) < (sk->sk_rcvbuf / 2) &&
- (rose->condition & ROSE_COND_OWN_RX_BUSY)) {
- rose->condition &= ~ROSE_COND_OWN_RX_BUSY;
- rose->condition &= ~ROSE_COND_ACK_PENDING;
- rose->vl = rose->vr;
- rose_write_internal(sk, ROSE_RR);
- rose_stop_timer(sk); /* HB */
- break;
- }
- break;
- }
-
- rose_start_heartbeat(sk);
-out:
- bh_unlock_sock(sk);
- sock_put(sk);
-}
-
-static void rose_timer_expiry(struct timer_list *t)
-{
- struct rose_sock *rose = timer_container_of(rose, t, timer);
- struct sock *sk = &rose->sock;
-
- bh_lock_sock(sk);
- if (sock_owned_by_user(sk)) {
- sk_reset_timer(sk, &rose->timer, jiffies + HZ/20);
- goto out;
- }
- switch (rose->state) {
- case ROSE_STATE_1: /* T1 */
- case ROSE_STATE_4: /* T2 */
- rose_write_internal(sk, ROSE_CLEAR_REQUEST);
- rose->state = ROSE_STATE_2;
- rose_start_t3timer(sk);
- break;
-
- case ROSE_STATE_2: /* T3 */
- rose_neigh_put(rose->neighbour);
- rose_disconnect(sk, ETIMEDOUT, -1, -1);
- break;
-
- case ROSE_STATE_3: /* HB */
- if (rose->condition & ROSE_COND_ACK_PENDING) {
- rose->condition &= ~ROSE_COND_ACK_PENDING;
- rose_enquiry_response(sk);
- }
- break;
- }
-out:
- bh_unlock_sock(sk);
- sock_put(sk);
-}
-
-static void rose_idletimer_expiry(struct timer_list *t)
-{
- struct rose_sock *rose = timer_container_of(rose, t, idletimer);
- struct sock *sk = &rose->sock;
-
- bh_lock_sock(sk);
- if (sock_owned_by_user(sk)) {
- sk_reset_timer(sk, &rose->idletimer, jiffies + HZ/20);
- goto out;
- }
- rose_clear_queues(sk);
-
- rose_write_internal(sk, ROSE_CLEAR_REQUEST);
- rose_sk(sk)->state = ROSE_STATE_2;
-
- rose_start_t3timer(sk);
-
- sk->sk_state = TCP_CLOSE;
- sk->sk_err = 0;
- sk->sk_shutdown |= SEND_SHUTDOWN;
-
- if (!sock_flag(sk, SOCK_DEAD)) {
- sk->sk_state_change(sk);
- sock_set_flag(sk, SOCK_DEAD);
- }
-out:
- bh_unlock_sock(sk);
- sock_put(sk);
-}
+++ /dev/null
-// SPDX-License-Identifier: GPL-2.0-or-later
-/*
- *
- * Copyright (C) 1996 Mike Shaver (shaver@zeroknowledge.com)
- */
-#include <linux/mm.h>
-#include <linux/sysctl.h>
-#include <linux/init.h>
-#include <net/ax25.h>
-#include <net/rose.h>
-
-static int min_timer[] = {1 * HZ};
-static int max_timer[] = {300 * HZ};
-static int min_idle[] = {0 * HZ};
-static int max_idle[] = {65535 * HZ};
-static int min_route[1], max_route[] = {1};
-static int min_ftimer[] = {60 * HZ};
-static int max_ftimer[] = {600 * HZ};
-static int min_maxvcs[] = {1}, max_maxvcs[] = {254};
-static int min_window[] = {1}, max_window[] = {7};
-
-static struct ctl_table_header *rose_table_header;
-
-static struct ctl_table rose_table[] = {
- {
- .procname = "restart_request_timeout",
- .data = &sysctl_rose_restart_request_timeout,
- .maxlen = sizeof(int),
- .mode = 0644,
- .proc_handler = proc_dointvec_minmax,
- .extra1 = &min_timer,
- .extra2 = &max_timer
- },
- {
- .procname = "call_request_timeout",
- .data = &sysctl_rose_call_request_timeout,
- .maxlen = sizeof(int),
- .mode = 0644,
- .proc_handler = proc_dointvec_minmax,
- .extra1 = &min_timer,
- .extra2 = &max_timer
- },
- {
- .procname = "reset_request_timeout",
- .data = &sysctl_rose_reset_request_timeout,
- .maxlen = sizeof(int),
- .mode = 0644,
- .proc_handler = proc_dointvec_minmax,
- .extra1 = &min_timer,
- .extra2 = &max_timer
- },
- {
- .procname = "clear_request_timeout",
- .data = &sysctl_rose_clear_request_timeout,
- .maxlen = sizeof(int),
- .mode = 0644,
- .proc_handler = proc_dointvec_minmax,
- .extra1 = &min_timer,
- .extra2 = &max_timer
- },
- {
- .procname = "no_activity_timeout",
- .data = &sysctl_rose_no_activity_timeout,
- .maxlen = sizeof(int),
- .mode = 0644,
- .proc_handler = proc_dointvec_minmax,
- .extra1 = &min_idle,
- .extra2 = &max_idle
- },
- {
- .procname = "acknowledge_hold_back_timeout",
- .data = &sysctl_rose_ack_hold_back_timeout,
- .maxlen = sizeof(int),
- .mode = 0644,
- .proc_handler = proc_dointvec_minmax,
- .extra1 = &min_timer,
- .extra2 = &max_timer
- },
- {
- .procname = "routing_control",
- .data = &sysctl_rose_routing_control,
- .maxlen = sizeof(int),
- .mode = 0644,
- .proc_handler = proc_dointvec_minmax,
- .extra1 = &min_route,
- .extra2 = &max_route
- },
- {
- .procname = "link_fail_timeout",
- .data = &sysctl_rose_link_fail_timeout,
- .maxlen = sizeof(int),
- .mode = 0644,
- .proc_handler = proc_dointvec_minmax,
- .extra1 = &min_ftimer,
- .extra2 = &max_ftimer
- },
- {
- .procname = "maximum_virtual_circuits",
- .data = &sysctl_rose_maximum_vcs,
- .maxlen = sizeof(int),
- .mode = 0644,
- .proc_handler = proc_dointvec_minmax,
- .extra1 = &min_maxvcs,
- .extra2 = &max_maxvcs
- },
- {
- .procname = "window_size",
- .data = &sysctl_rose_window_size,
- .maxlen = sizeof(int),
- .mode = 0644,
- .proc_handler = proc_dointvec_minmax,
- .extra1 = &min_window,
- .extra2 = &max_window
- },
-};
-
-void __init rose_register_sysctl(void)
-{
- rose_table_header = register_net_sysctl(&init_net, "net/rose", rose_table);
-}
-
-void rose_unregister_sysctl(void)
-{
- unregister_net_sysctl_table(rose_table_header);
-}
projects / thirdparty / kernel / linux.git / commitdiff
