include/linux/if.h

   1 /*
   2  * INET         An implementation of the TCP/IP protocol suite for the LINUX
   3  *              operating system.  INET is implemented using the  BSD Socket
   4  *              interface as the means of communication with the user level.
   5  *
   6  *              Global definitions for the INET interface module.
   7  *
   8  * Version:     @(#)if.h        1.0.2   04/18/93
   9  *
  10  * Authors:     Original taken from Berkeley UNIX 4.3, (c) UCB 1982-1988
  11  *              Ross Biro, <bir7@leland.Stanford.Edu>
  12  *              Fred N. van Kempen, <waltje@uWalt.NL.Mugnet.ORG>
  13  *
  14  *              This program is free software; you can redistribute it and/or
  15  *              modify it under the terms of the GNU General Public License
  16  *              as published by the Free Software Foundation; either version
  17  *              2 of the License, or (at your option) any later version.
  18  */
  19 #ifndef _LINUX_IF_H
  20 #define _LINUX_IF_H
  21
  22 #include <linux/types.h>                /* for "__kernel_caddr_t" et al */
  23 #include <linux/socket.h>               /* for "struct sockaddr" et al  */
  24
  25 /* Standard interface flags. */
  26 #define IFF_UP          0x1             /* interface is up              */
  27 #define IFF_BROADCAST   0x2             /* broadcast address valid      */
  28 #define IFF_DEBUG       0x4             /* turn on debugging            */
  29 #define IFF_LOOPBACK    0x8             /* is a loopback net            */
  30 #define IFF_POINTOPOINT 0x10            /* interface is has p-p link    */
  31 #define IFF_NOTRAILERS  0x20            /* avoid use of trailers        */
  32 #define IFF_RUNNING     0x40            /* resources allocated          */
  33 #define IFF_NOARP       0x80            /* no ARP protocol              */
  34 #define IFF_PROMISC     0x100           /* receive all packets          */
  35 #define IFF_ALLMULTI    0x200           /* receive all multicast packets*/
  36
  37 #define IFF_MASTER      0x400           /* master of a load balancer    */
  38 #define IFF_SLAVE       0x800           /* slave of a load balancer     */
  39
  40 #define IFF_MULTICAST   0x1000          /* Supports multicast           */
  41
  42 #define IFF_VOLATILE    (IFF_LOOPBACK|IFF_POINTOPOINT|IFF_BROADCAST|IFF_MASTER|IFF_SLAVE|IFF_RUNNING)
  43
  44 #define IFF_PORTSEL     0x2000          /* can set media type           */
  45 #define IFF_AUTOMEDIA   0x4000          /* auto media select active     */
  46 #define IFF_DYNAMIC     0x8000          /* dialup device with changing addresses*/
  47
  48 /*
  49  *      Device mapping structure. I'd just gone off and designed a
  50  *      beautiful scheme using only loadable modules with arguments
  51  *      for driver options and along come the PCMCIA people 8)
  52  *
  53  *      Ah well. The get() side of this is good for WDSETUP, and it'll
  54  *      be handy for debugging things. The set side is fine for now and
  55  *      being very small might be worth keeping for clean configuration.
  56  */
  57
  58 struct ifmap
  59 {
  60         unsigned long mem_start;
  61         unsigned long mem_end;
  62         unsigned short base_addr;
  63         unsigned char irq;
  64         unsigned char dma;
  65         unsigned char port;
  66         /* 3 bytes spare */
  67 };
  68
  69 /*
  70  * Interface request structure used for socket
  71  * ioctl's.  All interface ioctl's must have parameter
  72  * definitions which begin with ifr_name.  The
  73  * remainder may be interface specific.
  74  */
  75
  76 struct ifreq
  77 {
  78 #define IFHWADDRLEN     6
  79 #define IFNAMSIZ        16
  80         union
  81         {
  82                 char    ifrn_name[IFNAMSIZ];            /* if name, e.g. "en0" */
  83         } ifr_ifrn;
  84
  85         union {
  86                 struct  sockaddr ifru_addr;
  87                 struct  sockaddr ifru_dstaddr;
  88                 struct  sockaddr ifru_broadaddr;
  89                 struct  sockaddr ifru_netmask;
  90                 struct  sockaddr ifru_hwaddr;
  91                 short   ifru_flags;
  92                 int     ifru_ivalue;
  93                 int     ifru_mtu;
  94                 struct  ifmap ifru_map;
  95                 char    ifru_slave[IFNAMSIZ];   /* Just fits the size */
  96                 char    ifru_newname[IFNAMSIZ];
  97                 char *  ifru_data;
  98         } ifr_ifru;
  99 };
 100
 101 #define ifr_name        ifr_ifrn.ifrn_name      /* interface name       */
 102 #define ifr_hwaddr      ifr_ifru.ifru_hwaddr    /* MAC address          */
 103 #define ifr_addr        ifr_ifru.ifru_addr      /* address              */
 104 #define ifr_dstaddr     ifr_ifru.ifru_dstaddr   /* other end of p-p lnk */
 105 #define ifr_broadaddr   ifr_ifru.ifru_broadaddr /* broadcast address    */
 106 #define ifr_netmask     ifr_ifru.ifru_netmask   /* interface net mask   */
 107 #define ifr_flags       ifr_ifru.ifru_flags     /* flags                */
 108 #define ifr_metric      ifr_ifru.ifru_ivalue    /* metric               */
 109 #define ifr_mtu         ifr_ifru.ifru_mtu       /* mtu                  */
 110 #define ifr_map         ifr_ifru.ifru_map       /* device map           */
 111 #define ifr_slave       ifr_ifru.ifru_slave     /* slave device         */
 112 #define ifr_data        ifr_ifru.ifru_data      /* for use by interface */
 113 #define ifr_ifindex     ifr_ifru.ifru_ivalue    /* interface index      */
 114 #define ifr_bandwidth   ifr_ifru.ifru_ivalue    /* link bandwidth       */
 115 #define ifr_qlen        ifr_ifru.ifru_ivalue    /* Queue length         */
 116 #define ifr_newname     ifr_ifru.ifru_newname   /* New name             */
 117
 118 /*
 119  * Structure used in SIOCGIFCONF request.
 120  * Used to retrieve interface configuration
 121  * for machine (useful for programs which
 122  * must know all networks accessible).
 123  */
 124
 125 struct ifconf
 126 {
 127         int     ifc_len;                        /* size of buffer       */
 128         union
 129         {
 130                 char *                  ifcu_buf;
 131                 struct  ifreq           *ifcu_req;
 132         } ifc_ifcu;
 133 };
 134 #define ifc_buf ifc_ifcu.ifcu_buf               /* buffer address       */
 135 #define ifc_req ifc_ifcu.ifcu_req               /* array of structures  */
 136
 137
 138 #endif /* _LINUX_IF_H */