include/linux/if_arp.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 ARP (RFC 826) protocol.
   7  *
   8  * Version:     @(#)if_arp.h    1.0.1   04/16/93
   9  *
  10  * Authors:     Original taken from Berkeley UNIX 4.3, (c) UCB 1986-1988
  11  *              Portions taken from the KA9Q/NOS (v2.00m PA0GRI) source.
  12  *              Ross Biro, <bir7@leland.Stanford.Edu>
  13  *              Fred N. van Kempen, <waltje@uWalt.NL.Mugnet.ORG>
  14  *              Florian La Roche,
  15  *              Jonathan Layes <layes@loran.com>
  16  *
  17  *              This program is free software; you can redistribute it and/or
  18  *              modify it under the terms of the GNU General Public License
  19  *              as published by the Free Software Foundation; either version
  20  *              2 of the License, or (at your option) any later version.
  21  */
  22 #ifndef _LINUX_IF_ARP_H
  23 #define _LINUX_IF_ARP_H
  24
  25 #include <linux/netdevice.h>
  26
  27 /* ARP protocol HARDWARE identifiers. */
  28 #define ARPHRD_NETROM   0               /* from KA9Q: NET/ROM pseudo    */
  29 #define ARPHRD_ETHER    1               /* Ethernet 10Mbps              */
  30 #define ARPHRD_EETHER   2               /* Experimental Ethernet        */
  31 #define ARPHRD_AX25     3               /* AX.25 Level 2                */
  32 #define ARPHRD_PRONET   4               /* PROnet token ring            */
  33 #define ARPHRD_CHAOS    5               /* Chaosnet                     */
  34 #define ARPHRD_IEEE802  6               /* IEEE 802.2 Ethernet/TR/TB    */
  35 #define ARPHRD_ARCNET   7               /* ARCnet                       */
  36 #define ARPHRD_APPLETLK 8               /* APPLEtalk                    */
  37 #define ARPHRD_DLCI     15              /* Frame Relay DLCI             */
  38 #define ARPHRD_METRICOM 23              /* Metricom STRIP (new IANA id) */
  39
  40 /* Dummy types for non ARP hardware */
  41 #define ARPHRD_SLIP     256
  42 #define ARPHRD_CSLIP    257
  43 #define ARPHRD_SLIP6    258
  44 #define ARPHRD_CSLIP6   259
  45 #define ARPHRD_RSRVD    260             /* Notional KISS type           */
  46 #define ARPHRD_ADAPT    264
  47 #define ARPHRD_ROSE     270
  48 #define ARPHRD_X25      271             /* CCITT X.25                   */
  49 #define ARPHRD_PPP      512
  50 #define ARPHRD_HDLC     513             /* (Cisco) HDLC                 */
  51 #define ARPHRD_LAPB     516             /* LAPB                         */
  52
  53 #define ARPHRD_TUNNEL   768             /* IPIP tunnel                  */
  54 #define ARPHRD_TUNNEL6  769             /* IPIP6 tunnel                 */
  55 #define ARPHRD_FRAD     770             /* Frame Relay Access Device    */
  56 #define ARPHRD_SKIP     771             /* SKIP vif                     */
  57 #define ARPHRD_LOOPBACK 772             /* Loopback device              */
  58 #define ARPHRD_LOCALTLK 773             /* Localtalk device             */
  59 #define ARPHRD_FDDI     774             /* Fiber Distributed Data Interface */
  60 #define ARPHRD_BIF      775             /* AP1000 BIF                   */
  61 #define ARPHRD_SIT      776             /* sit0 device - IPv6-in-IPv4   */
  62 #define ARPHRD_IPDDP    777             /* IP over DDP tunneller        */
  63 #define ARPHRD_IPGRE    778             /* GRE over IP                  */
  64 #define ARPHRD_PIMREG   779             /* PIMSM register interface     */
  65 #define ARPHRD_HIPPI    780             /* High Performance Parallel Interface */
  66 #define ARPHRD_ASH      781             /* Nexus 64Mbps Ash             */
  67 #define ARPHRD_ECONET   782             /* Acorn Econet                 */
  68 #define ARPHRD_IRDA     783             /* Linux/IR                     */
  69 /* ARP works differently on different FC media .. so  */
  70 #define ARPHRD_FCPP     784             /* Point to point fibrechanel   */
  71 #define ARPHRD_FCAL     785             /* Fibrechannel arbitrated loop */
  72 #define ARPHRD_FCPL     786             /* Fibrechannel public loop     */
  73 #define ARPHRD_FCFABRIC 787             /* Fibrechannel fabric          */
  74         /* 787->799 reserved for fibrechannel media types */
  75
  76
  77 /* ARP protocol opcodes. */
  78 #define ARPOP_REQUEST   1               /* ARP request                  */
  79 #define ARPOP_REPLY     2               /* ARP reply                    */
  80 #define ARPOP_RREQUEST  3               /* RARP request                 */
  81 #define ARPOP_RREPLY    4               /* RARP reply                   */
  82
  83
  84 /* ARP ioctl request. */
  85 struct arpreq {
  86   struct sockaddr       arp_pa;         /* protocol address             */
  87   struct sockaddr       arp_ha;         /* hardware address             */
  88   int                   arp_flags;      /* flags                        */
  89   struct sockaddr       arp_netmask;    /* netmask (only for proxy arps) */
  90   char                  arp_dev[16];
  91 };
  92
  93 struct arpreq_old {
  94   struct sockaddr       arp_pa;         /* protocol address             */
  95   struct sockaddr       arp_ha;         /* hardware address             */
  96   int                   arp_flags;      /* flags                        */
  97   struct sockaddr       arp_netmask;    /* netmask (only for proxy arps) */
  98 };
  99
 100 /* ARP Flag values. */
 101 #define ATF_COM         0x02            /* completed entry (ha valid)   */
 102 #define ATF_PERM        0x04            /* permanent entry              */
 103 #define ATF_PUBL        0x08            /* publish entry                */
 104 #define ATF_USETRAILERS 0x10            /* has requested trailers       */
 105 #define ATF_NETMASK     0x20            /* want to use a netmask (only
 106                                            for proxy entries) */
 107 #define ATF_DONTPUB     0x40            /* don't answer this addresses  */
 108
 109 /*
 110  *      This structure defines an ethernet arp header.
 111  */
 112
 113 struct arphdr
 114 {
 115         unsigned short  ar_hrd;         /* format of hardware address   */
 116         unsigned short  ar_pro;         /* format of protocol address   */
 117         unsigned char   ar_hln;         /* length of hardware address   */
 118         unsigned char   ar_pln;         /* length of protocol address   */
 119         unsigned short  ar_op;          /* ARP opcode (command)         */
 120
 121 #if 0
 122          /*
 123           *      Ethernet looks like this : This bit is variable sized however...
 124           */
 125         unsigned char           ar_sha[ETH_ALEN];       /* sender hardware address      */
 126         unsigned char           ar_sip[4];              /* sender IP address            */
 127         unsigned char           ar_tha[ETH_ALEN];       /* target hardware address      */
 128         unsigned char           ar_tip[4];              /* target IP address            */
 129 #endif
 130
 131 };
 132
 133 #endif  /* _LINUX_IF_ARP_H */