if_arp.h

Go to the documentation of this file.

/*
 * INET     An implementation of the TCP/IP protocol suite for the LINUX
 *      operating system.  INET is implemented using the  BSD Socket
 *      interface as the means of communication with the user level.
 *
 *      Global definitions for the ARP (RFC 826) protocol.
 *
 * Version: @(#)if_arp.h    1.0.1   04/16/93
 *
 * Authors: Original taken from Berkeley UNIX 4.3, (c) UCB 1986-1988
 *      Portions taken from the KA9Q/NOS (v2.00m PA0GRI) source.
 *      Ross Biro
 *      Fred N. van Kempen, <[email protected]>
 *      Florian La Roche,
 *      Jonathan Layes <[email protected]>
 *      Arnaldo Carvalho de Melo <[email protected]> ARPHRD_HWX25
 *
 *      This program is free software; you can redistribute it and/or
 *      modify it under the terms of the GNU General Public License
 *      as published by the Free Software Foundation; either version
 *      2 of the License, or (at your option) any later version.
 */
#ifndef _UAPI_LINUX_IF_ARP_H
#define _UAPI_LINUX_IF_ARP_H

#include <linux/netdevice.h>

/* ARP protocol HARDWARE identifiers. */
#define ARPHRD_NETROM   0       /* from KA9Q: NET/ROM pseudo    */
#define ARPHRD_ETHER    1       /* Ethernet 10Mbps      */
#define ARPHRD_EETHER   2       /* Experimental Ethernet    */
#define ARPHRD_AX25 3       /* AX.25 Level 2        */
#define ARPHRD_PRONET   4       /* PROnet token ring        */
#define ARPHRD_CHAOS    5       /* Chaosnet         */
#define ARPHRD_IEEE802  6       /* IEEE 802.2 Ethernet/TR/TB    */
#define ARPHRD_ARCNET   7       /* ARCnet           */
#define ARPHRD_APPLETLK 8       /* APPLEtalk            */
#define ARPHRD_DLCI 15      /* Frame Relay DLCI     */
#define ARPHRD_ATM  19      /* ATM              */
#define ARPHRD_METRICOM 23      /* Metricom STRIP (new IANA id) */
#define ARPHRD_IEEE1394 24      /* IEEE 1394 IPv4 - RFC 2734    */
#define ARPHRD_EUI64    27      /* EUI-64                       */
#define ARPHRD_INFINIBAND 32        /* InfiniBand           */

/* Dummy types for non ARP hardware */
#define ARPHRD_SLIP 256
#define ARPHRD_CSLIP    257
#define ARPHRD_SLIP6    258
#define ARPHRD_CSLIP6   259
#define ARPHRD_RSRVD    260     /* Notional KISS type       */
#define ARPHRD_ADAPT    264
#define ARPHRD_ROSE 270
#define ARPHRD_X25  271     /* CCITT X.25           */
#define ARPHRD_HWX25    272     /* Boards with X.25 in firmware */
#define ARPHRD_CAN  280     /* Controller Area Network      */
#define ARPHRD_PPP  512
#define ARPHRD_CISCO    513     /* Cisco HDLC           */
#define ARPHRD_HDLC ARPHRD_CISCO
#define ARPHRD_LAPB 516     /* LAPB             */
#define ARPHRD_DDCMP    517     /* Digital's DDCMP protocol     */
#define ARPHRD_RAWHDLC  518     /* Raw HDLC         */

#define ARPHRD_TUNNEL   768     /* IPIP tunnel          */
#define ARPHRD_TUNNEL6  769     /* IP6IP6 tunnel            */
#define ARPHRD_FRAD 770             /* Frame Relay Access Device    */
#define ARPHRD_SKIP 771     /* SKIP vif         */
#define ARPHRD_LOOPBACK 772     /* Loopback device      */
#define ARPHRD_LOCALTLK 773     /* Localtalk device     */
#define ARPHRD_FDDI 774     /* Fiber Distributed Data Interface */
#define ARPHRD_BIF      775             /* AP1000 BIF                   */
#define ARPHRD_SIT  776     /* sit0 device - IPv6-in-IPv4   */
#define ARPHRD_IPDDP    777     /* IP over DDP tunneller    */
#define ARPHRD_IPGRE    778     /* GRE over IP          */
#define ARPHRD_PIMREG   779     /* PIMSM register interface */
#define ARPHRD_HIPPI    780     /* High Performance Parallel Interface */
#define ARPHRD_ASH  781     /* Nexus 64Mbps Ash     */
#define ARPHRD_ECONET   782     /* Acorn Econet         */
#define ARPHRD_IRDA     783     /* Linux-IrDA           */
/* ARP works differently on different FC media .. so  */
#define ARPHRD_FCPP 784     /* Point to point fibrechannel  */
#define ARPHRD_FCAL 785     /* Fibrechannel arbitrated loop */
#define ARPHRD_FCPL 786     /* Fibrechannel public loop */
#define ARPHRD_FCFABRIC 787     /* Fibrechannel fabric      */
    /* 787->799 reserved for fibrechannel media types */
#define ARPHRD_IEEE802_TR 800       /* Magic type ident for TR  */
#define ARPHRD_IEEE80211 801        /* IEEE 802.11          */
#define ARPHRD_IEEE80211_PRISM 802  /* IEEE 802.11 + Prism2 header  */
#define ARPHRD_IEEE80211_RADIOTAP 803   /* IEEE 802.11 + radiotap header */
#define ARPHRD_IEEE802154     804
#define ARPHRD_IEEE802154_MONITOR 805   /* IEEE 802.15.4 network monitor */

#define ARPHRD_PHONET   820     /* PhoNet media type        */
#define ARPHRD_PHONET_PIPE 821      /* PhoNet pipe header       */
#define ARPHRD_CAIF 822     /* CAIF media type      */
#define ARPHRD_IP6GRE   823     /* GRE over IPv6        */

#define ARPHRD_VOID   0xFFFF    /* Void type, nothing is known */
#define ARPHRD_NONE   0xFFFE    /* zero header length */

/* ARP protocol opcodes. */
#define ARPOP_REQUEST   1       /* ARP request          */
#define ARPOP_REPLY 2       /* ARP reply            */
#define ARPOP_RREQUEST  3       /* RARP request         */
#define ARPOP_RREPLY    4       /* RARP reply           */
#define ARPOP_InREQUEST 8       /* InARP request        */
#define ARPOP_InREPLY   9       /* InARP reply          */
#define ARPOP_NAK   10      /* (ATM)ARP NAK         */


/* ARP ioctl request. */
struct arpreq {
  struct sockaddr   arp_pa;     /* protocol address     */
  struct sockaddr   arp_ha;     /* hardware address     */
  int           arp_flags;  /* flags            */
  struct sockaddr       arp_netmask;    /* netmask (only for proxy arps) */
  char          arp_dev[16];
};

struct arpreq_old {
  struct sockaddr   arp_pa;     /* protocol address     */
  struct sockaddr   arp_ha;     /* hardware address     */
  int           arp_flags;  /* flags            */
  struct sockaddr       arp_netmask;    /* netmask (only for proxy arps) */
};

/* ARP Flag values. */
#define ATF_COM     0x02        /* completed entry (ha valid)   */
#define ATF_PERM    0x04        /* permanent entry      */
#define ATF_PUBL    0x08        /* publish entry        */
#define ATF_USETRAILERS 0x10        /* has requested trailers   */
#define ATF_NETMASK     0x20            /* want to use a netmask (only
                       for proxy entries) */
#define ATF_DONTPUB 0x40        /* don't answer this addresses  */

/*
 *  This structure defines an ethernet arp header.
 */

struct arphdr {
    __be16      ar_hrd;     /* format of hardware address   */
    __be16      ar_pro;     /* format of protocol address   */
    unsigned char   ar_hln;     /* length of hardware address   */
    unsigned char   ar_pln;     /* length of protocol address   */
    __be16      ar_op;      /* ARP opcode (command)     */

#if 0
     /*
      *  Ethernet looks like this : This bit is variable sized however...
      */
    unsigned char       ar_sha[ETH_ALEN];   /* sender hardware address  */
    unsigned char       ar_sip[4];      /* sender IP address        */
    unsigned char       ar_tha[ETH_ALEN];   /* target hardware address  */
    unsigned char       ar_tip[4];      /* target IP address        */
#endif

};


#endif /* _UAPI_LINUX_IF_ARP_H */