include/linux/if.h

   1 /* SPDX-License-Identifier: GPL-2.0+ WITH Linux-syscall-note */
   2 /*
   3  * INET         An implementation of the TCP/IP protocol suite for the LINUX
   4  *              operating system.  INET is implemented using the  BSD Socket
   5  *              interface as the means of communication with the user level.
   6  *
   7  *              Global definitions for the INET interface module.
   8  *
   9  * Version:     @(#)if.h        1.0.2   04/18/93
  10  *
  11  * Authors:     Original taken from Berkeley UNIX 4.3, (c) UCB 1982-1988
  12  *              Ross Biro
  13  *              Fred N. van Kempen, <waltje@uWalt.NL.Mugnet.ORG>
  14  *
  15  *              This program is free software; you can redistribute it and/or
  16  *              modify it under the terms of the GNU General Public License
  17  *              as published by the Free Software Foundation; either version
  18  *              2 of the License, or (at your option) any later version.
  19  */
  20 #ifndef _LINUX_IF_H
  21 #define _LINUX_IF_H
  22
  23 #include <linux/libc-compat.h>          /* for compatibility with glibc */
  24 #include <linux/types.h>                /* for "__kernel_caddr_t" et al */
  25 #include <linux/socket.h>               /* for "struct sockaddr" et al  */
  26                 /* for "__user" et al           */
  27
  28 #include <sys/socket.h>                 /* for struct sockaddr.         */
  29
  30 #if __UAPI_DEF_IF_IFNAMSIZ
  31 #define IFNAMSIZ        16
  32 #endif /* __UAPI_DEF_IF_IFNAMSIZ */
  33 #define IFALIASZ        256
  34 #include <linux/hdlc/ioctl.h>
  35
  36 /* For glibc compatibility. An empty enum does not compile. */
  37 #if __UAPI_DEF_IF_NET_DEVICE_FLAGS_LOWER_UP_DORMANT_ECHO != 0 || \
  38     __UAPI_DEF_IF_NET_DEVICE_FLAGS != 0
  39 /**
  40  * enum net_device_flags - &struct net_device flags
  41  *
  42  * These are the &struct net_device flags, they can be set by drivers, the
  43  * kernel and some can be triggered by userspace. Userspace can query and
  44  * set these flags using userspace utilities but there is also a sysfs
  45  * entry available for all dev flags which can be queried and set. These flags
  46  * are shared for all types of net_devices. The sysfs entries are available
  47  * via /sys/class/net/<dev>/flags. Flags which can be toggled through sysfs
  48  * are annotated below, note that only a few flags can be toggled and some
  49  * other flags are always preserved from the original net_device flags
  50  * even if you try to set them via sysfs. Flags which are always preserved
  51  * are kept under the flag grouping @IFF_VOLATILE. Flags which are __volatile__
  52  * are annotated below as such.
  53  *
  54  * You should have a pretty good reason to be extending these flags.
  55  *
  56  * @IFF_UP: interface is up. Can be toggled through sysfs.
  57  * @IFF_BROADCAST: broadcast address valid. Volatile.
  58  * @IFF_DEBUG: turn on debugging. Can be toggled through sysfs.
  59  * @IFF_LOOPBACK: is a loopback net. Volatile.
  60  * @IFF_POINTOPOINT: interface is has p-p link. Volatile.
  61  * @IFF_NOTRAILERS: avoid use of trailers. Can be toggled through sysfs.
  62  *      Volatile.
  63  * @IFF_RUNNING: interface RFC2863 OPER_UP. Volatile.
  64  * @IFF_NOARP: no ARP protocol. Can be toggled through sysfs. Volatile.
  65  * @IFF_PROMISC: receive all packets. Can be toggled through sysfs.
  66  * @IFF_ALLMULTI: receive all multicast packets. Can be toggled through
  67  *      sysfs.
  68  * @IFF_MASTER: master of a load balancer. Volatile.
  69  * @IFF_SLAVE: slave of a load balancer. Volatile.
  70  * @IFF_MULTICAST: Supports multicast. Can be toggled through sysfs.
  71  * @IFF_PORTSEL: can set media type. Can be toggled through sysfs.
  72  * @IFF_AUTOMEDIA: auto media select active. Can be toggled through sysfs.
  73  * @IFF_DYNAMIC: dialup device with changing addresses. Can be toggled
  74  *      through sysfs.
  75  * @IFF_LOWER_UP: driver signals L1 up. Volatile.
  76  * @IFF_DORMANT: driver signals dormant. Volatile.
  77  * @IFF_ECHO: echo sent packets. Volatile.
  78  */
  79 enum net_device_flags {
  80 /* for compatibility with glibc net/if.h */
  81 #if __UAPI_DEF_IF_NET_DEVICE_FLAGS
  82         IFF_UP                          = 1<<0,  /* sysfs */
  83         IFF_BROADCAST                   = 1<<1,  /* __volatile__ */
  84         IFF_DEBUG                       = 1<<2,  /* sysfs */
  85         IFF_LOOPBACK                    = 1<<3,  /* __volatile__ */
  86         IFF_POINTOPOINT                 = 1<<4,  /* __volatile__ */
  87         IFF_NOTRAILERS                  = 1<<5,  /* sysfs */
  88         IFF_RUNNING                     = 1<<6,  /* __volatile__ */
  89         IFF_NOARP                       = 1<<7,  /* sysfs */
  90         IFF_PROMISC                     = 1<<8,  /* sysfs */
  91         IFF_ALLMULTI                    = 1<<9,  /* sysfs */
  92         IFF_MASTER                      = 1<<10, /* __volatile__ */
  93         IFF_SLAVE                       = 1<<11, /* __volatile__ */
  94         IFF_MULTICAST                   = 1<<12, /* sysfs */
  95         IFF_PORTSEL                     = 1<<13, /* sysfs */
  96         IFF_AUTOMEDIA                   = 1<<14, /* sysfs */
  97         IFF_DYNAMIC                     = 1<<15, /* sysfs */
  98 #endif /* __UAPI_DEF_IF_NET_DEVICE_FLAGS */
  99 #if __UAPI_DEF_IF_NET_DEVICE_FLAGS_LOWER_UP_DORMANT_ECHO
 100         IFF_LOWER_UP                    = 1<<16, /* __volatile__ */
 101         IFF_DORMANT                     = 1<<17, /* __volatile__ */
 102         IFF_ECHO                        = 1<<18, /* __volatile__ */
 103 #endif /* __UAPI_DEF_IF_NET_DEVICE_FLAGS_LOWER_UP_DORMANT_ECHO */
 104 };
 105 #endif /* __UAPI_DEF_IF_NET_DEVICE_FLAGS_LOWER_UP_DORMANT_ECHO != 0 || __UAPI_DEF_IF_NET_DEVICE_FLAGS != 0 */
 106
 107 /* for compatibility with glibc net/if.h */
 108 #if __UAPI_DEF_IF_NET_DEVICE_FLAGS
 109 #define IFF_UP                          IFF_UP
 110 #define IFF_BROADCAST                   IFF_BROADCAST
 111 #define IFF_DEBUG                       IFF_DEBUG
 112 #define IFF_LOOPBACK                    IFF_LOOPBACK
 113 #define IFF_POINTOPOINT                 IFF_POINTOPOINT
 114 #define IFF_NOTRAILERS                  IFF_NOTRAILERS
 115 #define IFF_RUNNING                     IFF_RUNNING
 116 #define IFF_NOARP                       IFF_NOARP
 117 #define IFF_PROMISC                     IFF_PROMISC
 118 #define IFF_ALLMULTI                    IFF_ALLMULTI
 119 #define IFF_MASTER                      IFF_MASTER
 120 #define IFF_SLAVE                       IFF_SLAVE
 121 #define IFF_MULTICAST                   IFF_MULTICAST
 122 #define IFF_PORTSEL                     IFF_PORTSEL
 123 #define IFF_AUTOMEDIA                   IFF_AUTOMEDIA
 124 #define IFF_DYNAMIC                     IFF_DYNAMIC
 125 #endif /* __UAPI_DEF_IF_NET_DEVICE_FLAGS */
 126
 127 #if __UAPI_DEF_IF_NET_DEVICE_FLAGS_LOWER_UP_DORMANT_ECHO
 128 #define IFF_LOWER_UP                    IFF_LOWER_UP
 129 #define IFF_DORMANT                     IFF_DORMANT
 130 #define IFF_ECHO                        IFF_ECHO
 131 #endif /* __UAPI_DEF_IF_NET_DEVICE_FLAGS_LOWER_UP_DORMANT_ECHO */
 132
 133 #define IFF_VOLATILE    (IFF_LOOPBACK|IFF_POINTOPOINT|IFF_BROADCAST|IFF_ECHO|\
 134                 IFF_MASTER|IFF_SLAVE|IFF_RUNNING|IFF_LOWER_UP|IFF_DORMANT)
 135
 136 #define IF_GET_IFACE    0x0001          /* for querying only */
 137 #define IF_GET_PROTO    0x0002
 138
 139 /* For definitions see hdlc.h */
 140 #define IF_IFACE_V35    0x1000          /* V.35 serial interface        */
 141 #define IF_IFACE_V24    0x1001          /* V.24 serial interface        */
 142 #define IF_IFACE_X21    0x1002          /* X.21 serial interface        */
 143 #define IF_IFACE_T1     0x1003          /* T1 telco serial interface    */
 144 #define IF_IFACE_E1     0x1004          /* E1 telco serial interface    */
 145 #define IF_IFACE_SYNC_SERIAL 0x1005     /* can't be set by software     */
 146 #define IF_IFACE_X21D   0x1006          /* X.21 Dual Clocking (FarSite) */
 147
 148 /* For definitions see hdlc.h */
 149 #define IF_PROTO_HDLC   0x2000          /* raw HDLC protocol            */
 150 #define IF_PROTO_PPP    0x2001          /* PPP protocol                 */
 151 #define IF_PROTO_CISCO  0x2002          /* Cisco HDLC protocol          */
 152 #define IF_PROTO_FR     0x2003          /* Frame Relay protocol         */
 153 #define IF_PROTO_FR_ADD_PVC 0x2004      /*    Create FR PVC             */
 154 #define IF_PROTO_FR_DEL_PVC 0x2005      /*    Delete FR PVC             */
 155 #define IF_PROTO_X25    0x2006          /* X.25                         */
 156 #define IF_PROTO_HDLC_ETH 0x2007        /* raw HDLC, Ethernet emulation */
 157 #define IF_PROTO_FR_ADD_ETH_PVC 0x2008  /*  Create FR Ethernet-bridged PVC */
 158 #define IF_PROTO_FR_DEL_ETH_PVC 0x2009  /*  Delete FR Ethernet-bridged PVC */
 159 #define IF_PROTO_FR_PVC 0x200A          /* for reading PVC status       */
 160 #define IF_PROTO_FR_ETH_PVC 0x200B
 161 #define IF_PROTO_RAW    0x200C          /* RAW Socket                   */
 162
 163 /* RFC 2863 operational status */
 164 enum {
 165         IF_OPER_UNKNOWN,
 166         IF_OPER_NOTPRESENT,
 167         IF_OPER_DOWN,
 168         IF_OPER_LOWERLAYERDOWN,
 169         IF_OPER_TESTING,
 170         IF_OPER_DORMANT,
 171         IF_OPER_UP,
 172 };
 173
 174 /* link modes */
 175 enum {
 176         IF_LINK_MODE_DEFAULT,
 177         IF_LINK_MODE_DORMANT,   /* limit upward transition to dormant */
 178 };
 179
 180 /*
 181  *      Device mapping structure. I'd just gone off and designed a
 182  *      beautiful scheme using only loadable modules with arguments
 183  *      for driver options and along come the PCMCIA people 8)
 184  *
 185  *      Ah well. The get() side of this is good for WDSETUP, and it'll
 186  *      be handy for debugging things. The set side is fine for now and
 187  *      being very small might be worth keeping for clean configuration.
 188  */
 189
 190 /* for compatibility with glibc net/if.h */
 191 #if __UAPI_DEF_IF_IFMAP
 192 struct ifmap {
 193         unsigned long mem_start;
 194         unsigned long mem_end;
 195         unsigned short base_addr;
 196         unsigned char irq;
 197         unsigned char dma;
 198         unsigned char port;
 199         /* 3 bytes spare */
 200 };
 201 #endif /* __UAPI_DEF_IF_IFMAP */
 202
 203 struct if_settings {
 204         unsigned int type;      /* Type of physical device or protocol */
 205         unsigned int size;      /* Size of the data allocated by the caller */
 206         union {
 207                 /* {atm/eth/dsl}_settings anyone ? */
 208                 raw_hdlc_proto          *raw_hdlc;
 209                 cisco_proto             *cisco;
 210                 fr_proto                *fr;
 211                 fr_proto_pvc            *fr_pvc;
 212                 fr_proto_pvc_info       *fr_pvc_info;
 213
 214                 /* interface settings */
 215                 sync_serial_settings    *sync;
 216                 te1_settings            *te1;
 217         } ifs_ifsu;
 218 };
 219
 220 /*
 221  * Interface request structure used for socket
 222  * ioctl's.  All interface ioctl's must have parameter
 223  * definitions which begin with ifr_name.  The
 224  * remainder may be interface specific.
 225  */
 226
 227 /* for compatibility with glibc net/if.h */
 228 #if __UAPI_DEF_IF_IFREQ
 229 struct ifreq {
 230 #define IFHWADDRLEN     6
 231         union
 232         {
 233                 char    ifrn_name[IFNAMSIZ];            /* if name, e.g. "en0" */
 234         } ifr_ifrn;
 235
 236         union {
 237                 struct  sockaddr ifru_addr;
 238                 struct  sockaddr ifru_dstaddr;
 239                 struct  sockaddr ifru_broadaddr;
 240                 struct  sockaddr ifru_netmask;
 241                 struct  sockaddr ifru_hwaddr;
 242                 short   ifru_flags;
 243                 int     ifru_ivalue;
 244                 int     ifru_mtu;
 245                 struct  ifmap ifru_map;
 246                 char    ifru_slave[IFNAMSIZ];   /* Just fits the size */
 247                 char    ifru_newname[IFNAMSIZ];
 248                 void *  ifru_data;
 249                 struct  if_settings ifru_settings;
 250         } ifr_ifru;
 251 };
 252 #endif /* __UAPI_DEF_IF_IFREQ */
 253
 254 #define ifr_name        ifr_ifrn.ifrn_name      /* interface name       */
 255 #define ifr_hwaddr      ifr_ifru.ifru_hwaddr    /* MAC address          */
 256 #define ifr_addr        ifr_ifru.ifru_addr      /* address              */
 257 #define ifr_dstaddr     ifr_ifru.ifru_dstaddr   /* other end of p-p lnk */
 258 #define ifr_broadaddr   ifr_ifru.ifru_broadaddr /* broadcast address    */
 259 #define ifr_netmask     ifr_ifru.ifru_netmask   /* interface net mask   */
 260 #define ifr_flags       ifr_ifru.ifru_flags     /* flags                */
 261 #define ifr_metric      ifr_ifru.ifru_ivalue    /* metric               */
 262 #define ifr_mtu         ifr_ifru.ifru_mtu       /* mtu                  */
 263 #define ifr_map         ifr_ifru.ifru_map       /* device map           */
 264 #define ifr_slave       ifr_ifru.ifru_slave     /* slave device         */
 265 #define ifr_data        ifr_ifru.ifru_data      /* for use by interface */
 266 #define ifr_ifindex     ifr_ifru.ifru_ivalue    /* interface index      */
 267 #define ifr_bandwidth   ifr_ifru.ifru_ivalue    /* link bandwidth       */
 268 #define ifr_qlen        ifr_ifru.ifru_ivalue    /* Queue length         */
 269 #define ifr_newname     ifr_ifru.ifru_newname   /* New name             */
 270 #define ifr_settings    ifr_ifru.ifru_settings  /* Device/proto settings*/
 271
 272 /*
 273  * Structure used in SIOCGIFCONF request.
 274  * Used to retrieve interface configuration
 275  * for machine (useful for programs which
 276  * must know all networks accessible).
 277  */
 278
 279 /* for compatibility with glibc net/if.h */
 280 #if __UAPI_DEF_IF_IFCONF
 281 struct ifconf  {
 282         int     ifc_len;                        /* size of buffer       */
 283         union {
 284                 char *ifcu_buf;
 285                 struct ifreq *ifcu_req;
 286         } ifc_ifcu;
 287 };
 288 #endif /* __UAPI_DEF_IF_IFCONF */
 289
 290 #define ifc_buf ifc_ifcu.ifcu_buf               /* buffer address       */
 291 #define ifc_req ifc_ifcu.ifcu_req               /* array of structures  */
 292
 293 #endif /* _LINUX_IF_H */