wintun: Fix double-quoted strings escaping on output

Signed-off-by: Simon Rozman <simon@rozman.si>

wintun: Introduce SetupAPI enumerator and machineName consts

Signed-off-by: Simon Rozman <simon@rozman.si>

Windows: Apply strict security descriptor on pipe server

Signed-off-by: Odd Stranne <odd@mullvad.net>

uapi: windows: work out pipe semantics

Pipes can be arranged like this, so that's fine. We also apply a strict
SDDL that can't be inherited and only gives access to local system.

Developed-with: Odd Stranne <odd@mullvad.net>

wintun: Cleanup

Signed-off-by: Simon Rozman <simon@rozman.si>

wintun: Refactor network registry key name generation

Signed-off-by: Simon Rozman <simon@rozman.si>

wintun: Revise interface creation wait

DIF_INSTALLDEVICE returns almost immediately, while the device
installation continues in the background. It might take a while, before
all registry keys and values are populated.

Previously, wireguard-go waited for HKLM\SYSTEM\CurrentControlSet\
Control\Class\{4D36E972-E325-11CE-BFC1-08002BE10318}\<id> registry key
only.

Followed by a SetInterfaceName() method of Wintun struct which tried to
access HKLM\SYSTEM\CurrentControlSet\Control\Network\
{4D36E972-E325-11CE-BFC1-08002BE10318}\<id>\Connection registry key
might not be available yet.

This commit loops until both registry keys are available before
returning from CreateInterface() function.

Signed-off-by: Simon Rozman <simon@rozman.si>

receive: squelch tear down error

tun: linux: work out netpoll trick

wintun: Resolve some of golint warnings

Signed-off-by: Simon Rozman <simon@rozman.si>

Elaborate the failing step when forwarding errors on return

Signed-off-by: Simon Rozman <simon@rozman.si>

Simplify reading NetCfgInstanceId from registry

As querying non-existing registry value and reading non-existing
registry string value both return ERROR_FILE_NOT_FOUND, we can
use later only.

Signed-off-by: Simon Rozman <simon@rozman.si>

Unify interface-specific network registry key open

Signed-off-by: Simon Rozman <simon@rozman.si>

tun: import mobile particularities

boundif: introduce API for socket binding

global: begin modularization

tun: windows: expose GUID

tun: allow special methods in NativeTun

tun: linux: netpoll is broken for tun's epoll

So this mostly reverts the switch to Sysconn for Linux.

Issue: https://github.com/golang/go/issues/30426

tun: linux: netlink sock needs cleaning up but file will be gc'd

tun: use netpoll instead of rwcancel

The new sysconn function of Go 1.12 makes this possible:

package main

import "log"
import "os"
import "unsafe"
import "time"
import "syscall"
import "sync"
import "golang.org/x/sys/unix"

func main() {
fd, err := os.OpenFile("/dev/net/tun", os.O_RDWR, 0)
if err != nil {
log.Fatal(err)
}

var ifr [unix.IFNAMSIZ + 64]byte
copy(ifr[:], []byte("cheese"))
*(*uint16)(unsafe.Pointer(&ifr[unix.IFNAMSIZ])) = unix.IFF_TUN

var errno syscall.Errno
s, _ := fd.SyscallConn()
s.Control(func(fd uintptr) {
_, _, errno = unix.Syscall(
unix.SYS_IOCTL,
fd,
uintptr(unix.TUNSETIFF),
uintptr(unsafe.Pointer(&ifr[0])),
)
})
if errno != 0 {
log.Fatal(errno)
}

b := [4]byte{}
wait := sync.WaitGroup{}
wait.Add(1)
go func() {
_, err := fd.Read(b[:])
log.Print("Read errored: ", err)
wait.Done()
}()
time.Sleep(time.Second)
log.Print("Closing")
err = fd.Close()
if err != nil {
log.Print("Close errored: " , err)
}
wait.Wait()
log.Print("Exiting")
}

tun: use sysconn instead of .Fd with Go 1.12

Rearrange imports

device: send persistent keepalive when bringing up device

Reported-by: Marcelo Bello

wintun: Read/write packet size from/to exchange buffer directly

Driver <-> user-space communication is local and using native endian.

Signed-off-by: Simon Rozman <simon@rozman.si>

wintun: Make two-step slicing a one step

Stop relying to Go compiler optimizations and calculate the end offset
directly.

Signed-off-by: Simon Rozman <simon@rozman.si>

wintun: Write exchange buffer increased back to 1MiB

Signed-off-by: Simon Rozman <simon@rozman.si>

wintun: Migrate from unsafe buffer handling to encoding/binary

Signed-off-by: Simon Rozman <simon@rozman.si>

wintun: Adopt new packet data alignment

Signed-off-by: Simon Rozman <simon@rozman.si>

wintun: Cleanup

Signed-off-by: Simon Rozman <simon@rozman.si>

wintun: Add TUN device locking

In case reading from TUN device detected TUN device was closed, it
closed the file handle and set tunFile to nil. The tunFile is
automatically reopened on retry, but... If another packet comes in the
WireGuard calls Write() method. With tunFile set to nil, this will
cause access violation.

Therefore, locking was introduced.

Signed-off-by: Simon Rozman <simon@rozman.si>

wintun: Move exchange buffer in separate struct on heap

This allows buffer alignment and keeps it together with its meta-data.

Furthermore, the write buffer has been reduced - as long as we flush
after _every_ write, we don't need a 1MiB write buffer.

Signed-off-by: Simon Rozman <simon@rozman.si>

wintun: Switch to dynamic packet sizes

Signed-off-by: Simon Rozman <simon@rozman.si>

Change package path

Bump dependencies for ARM ChaCha20

wintun: Auto-calculate TUN exchange buffer size

Signed-off-by: Simon Rozman <simon@rozman.si>

wintun: Simplify Read method()

Signed-off-by: Simon Rozman <simon@rozman.si>

wintun: Make constants private and adopt Go recommended case

Signed-off-by: Simon Rozman <simon@rozman.si>

wintun: Check for user close in read loop regardless the load

Do the WaitForSingleObject() always to provide high-load responsiveness.

Reorder events so TUN_SIGNAL_CLOSE has priority over
TUN_SIGNAL_DATA_AVAIL, to provide high-load responsiveness at all.

Signed-off-by: Simon Rozman <simon@rozman.si>

wintun: Adjust tunRWQueue.left member to match Wintun driver

Signed-off-by: Simon Rozman <simon@rozman.si>

setupapi: Merge _SP_DRVINFO_DETAIL_DATA and DrvInfoDetailData

Signed-off-by: Simon Rozman <simon@rozman.si>

setupapi: Merge SP_DRVINFO_DATA and DrvInfoData

Signed-off-by: Simon Rozman <simon@rozman.si>

setupapi: Rename SP_REMOVEDEVICE_PARAMS to RemoveDeviceParams

Signed-off-by: Simon Rozman <simon@rozman.si>

setupapi: Rename SP_CLASSINSTALL_HEADER to ClassInstallHeader

Signed-off-by: Simon Rozman <simon@rozman.si>

setupapi: Merge _SP_DEVINSTALL_PARAMS and DevInstallParams

Signed-off-by: Simon Rozman <simon@rozman.si>

setupapi: Merge _SP_DEVINFO_LIST_DETAIL_DATA and DevInfoListDetailData

Signed-off-by: Simon Rozman <simon@rozman.si>

setupapi: Rename SP_DEVINFO_DATA to DevInfoData

Signed-off-by: Simon Rozman <simon@rozman.si>

wintun: Detect if a foreign interface with the same name exists

Signed-off-by: Simon Rozman <simon@rozman.si>

wintun: Clean excessive setupapi.DevInfo.GetDeviceInfoListDetail() call

Signed-off-by: Simon Rozman <simon@rozman.si>

wintun: Explain rationale behind case-insensitive interface names

Signed-off-by: Simon Rozman <simon@rozman.si>

wintun: Implement TODO in TestSetupDiGetDeviceRegistryProperty()

Signed-off-by: Simon Rozman <simon@rozman.si>

wintun: add FlushInterface stub

main_windows: Get iface name from argument

wintun: Compare values of GUID, not pointers, when removing

main_windows: Catch more exit events

wintun: Introduce new package for obscuring Windows bits

tun_windows: Style

setupapi: Lower case params

setupapi: Do not export the toGo/toWindows functions

setupapi: Pass pointers instead of values

tun_windows: Introduce preliminary TUN interface creation

Signed-off-by: Simon Rozman <simon@rozman.si>

tun_windows: Stop checking minimum size of received TUN packets

Signed-off-by: Simon Rozman <simon@rozman.si>

setupapi: Add DrvInfoDetailData.IsCompatible() to simplify HID detection

Signed-off-by: Simon Rozman <simon@rozman.si>

setupapi: Add SP_DRVINFO_DATA.IsNewer() method to simplify comparison

Signed-off-by: Simon Rozman <simon@rozman.si>

setupapi: Make toUTF16() public and add UTF16ToBuf() counterpart

Signed-off-by: Simon Rozman <simon@rozman.si>

Fix up errors and paths

conn: close ipv4 socket when ipv6 socket fails

setupapi: Add support for driver info lists

Signed-off-by: Simon Rozman <simon@rozman.si>

setupapi: Move Go<>Windows struct marshaling to types_windows.go

Signed-off-by: Simon Rozman <simon@rozman.si>

setupapi: Add support for SetupDi(Get|Set)DeviceRegistryProperty()

Signed-off-by: Simon Rozman <simon@rozman.si>

setupapi: Introduce DevInfo methods for cleaner code

Signed-off-by: Simon Rozman <simon@rozman.si>

Add support for setupapi.SetupDi(Get|Set)SelectedDevice()

Signed-off-by: Simon Rozman <simon@rozman.si>

Reorder data-types and functions to match SetupAPI.h

Adding functions with non-consistent order made setupapi package a mess.
While we could reorder data-types and functions by alphabet - it would
make searching easier - it would put ...Get... and ...Set... functions
quite apart.

Therefore, the SetupAPI.h order was adopted.

Signed-off-by: Simon Rozman <simon@rozman.si>

Add support for setupapi.SetupDiCreateDeviceInfo()

Signed-off-by: Simon Rozman <simon@rozman.si>

Add support for setupapi.setupDiCreateDeviceInfoListEx()

Signed-off-by: Simon Rozman <simon@rozman.si>

Stop accessing SetupDiGetDeviceInfoListDetail() output on error

The data returned by SetupDiGetDeviceInfoListDetail() is nil on error
which will cause the test to crash should the function fail.

Signed-off-by: Simon Rozman <simon@rozman.si>

Unify certain variable names

Signed-off-by: Simon Rozman <simon@rozman.si>

Simplify SetupDiEnumDeviceInfo() synopsis

The SetupDiEnumDeviceInfo() now returns a SP_DEVINFO_DATA rather than
taking it on input to fill it on return.

Signed-off-by: Simon Rozman <simon@rozman.si>

Change generic local variable names with meaningful replacements

Signed-off-by: Simon Rozman <simon@rozman.si>

Add support for setupapi.SetupDiClassGuidsFromNameEx()

Signed-off-by: Simon Rozman <simon@rozman.si>

Clean an unused constant

Signed-off-by: Simon Rozman <simon@rozman.si>

Replace SetupDiClassNameFromGuid() with SetupDiClassNameFromGuidEx()

The former is only a subset of the later. To minimize future
maintenance, we'll provide support for extended version only.

Signed-off-by: Simon Rozman <simon@rozman.si>

Add support for setupapi.SetupDiClassNameFromGuid()

Signed-off-by: Simon Rozman <simon@rozman.si>

Stop checking for valid handle in DevInfo.Close()

User should not have called or deferred the Close() method should
SetupDiGetClassDevsEx() return an error (and invalid handle). And even
if user does that, a SetupDiDestroyDeviceInfoList(INVALID_HANDLE_VALUE)
is harmless. It just returns ERROR_INVALID_HANDLE - we have a unit test
for this in TestSetupDiDestroyDeviceInfoList().

Signed-off-by: Simon Rozman <simon@rozman.si>

Add support for setupapi.SetupDiCallClassInstaller()

Signed-off-by: Simon Rozman <simon@rozman.si>

Add support for setupapi.SetupDi(Get|Set)ClassInstallParams()

Signed-off-by: Simon Rozman <simon@rozman.si>

Add support for setupapi.SetupDi(Get|Set)DeviceInstallParams()

Signed-off-by: Simon Rozman <simon@rozman.si>

Add support for setupapi.SetupDiOpenDevRegKey()

Furthermore setupapi.DevInfoData has been obsoleted.
SetupDiEnumDeviceInfo() fills existing SP_DEVINFO_DATA structure now.
As other functions of SetupAPI use SP_DEVINFO_DATA, converting it to
DevInfoData and back would hurt performance.

Signed-off-by: Simon Rozman <simon@rozman.si>

Add support for setupapi.SetupDiEnumDeviceInfo()

Signed-off-by: Simon Rozman <simon@rozman.si>

Update exported types and functions annotations

Signed-off-by: Simon Rozman <simon@rozman.si>

Add support for setupapi.SetupDiGetDeviceInfoListDetail()

Signed-off-by: Simon Rozman <simon@rozman.si>

Finish support for setupapi.SetupDiGetClassDevsEx()

Signed-off-by: Simon Rozman <simon@rozman.si>

Introduce SetupAPI - Windows device and driver management API

Signed-off-by: Simon Rozman <simon@rozman.si>

Import windows scafolding

noise: store clamped key instead of raw key

tai64n: whiten nano seconds

Avoid being too precise of a time oracle.

uapi: Simpler function signature

Extend structs rather than embed, when possible

Update copyright

Properly bubble up setsockopt error from closure