usr/src/lib/libbc/inc/include/net/if_arp.h

   1 /*
   2  * Copyright 1997-2003 Sun Microsystems, Inc.  All rights reserved.
   3  * Use is subject to license terms.
   4  */
   5
   6 /*
   7  * Copyright (c) 1986 Regents of the University of California.
   8  * All rights reserved.  The Berkeley software License Agreement
   9  * specifies the terms and conditions for redistribution.
  10  */
  11 /*
  12  * This libbc private version of if_arp.h is being created as an
  13  * exact copy of <net/if_arp.h> prior to the addition of the
  14  * "struct xarpreq" in the standard <net/if_arp.h>. The libbc code
  15  * does not understand the structure elements in "struct xarpreq".
  16  */
  17
  18
  19 #ifndef _net_if_arp_h
  20 #define _net_if_arp_h
  21
  22 #pragma ident   "%Z%%M% %I%     %E% SMI"
  23
  24 #ifdef  __cplusplus
  25 extern "C" {
  26 #endif
  27
  28 /*
  29  * Address Resolution Protocol.
  30  *
  31  * See RFC 826 for protocol description.  ARP packets are variable
  32  * in size; the arphdr structure defines the fixed-length portion.
  33  * Protocol type values are the same as those for 10 Mb/s Ethernet.
  34  * It is followed by the variable-sized fields ar_sha, arp_spa,
  35  * arp_tha and arp_tpa in that order, according to the lengths
  36  * specified.  Field names used correspond to RFC 826.
  37  */
  38 struct  arphdr {
  39         ushort_t ar_hrd;        /* format of hardware address */
  40 #define ARPHRD_ETHER    1       /* ethernet hardware address */
  41         ushort_t ar_pro;        /* format of protocol address */
  42         uchar_t ar_hln;         /* length of hardware address */
  43         uchar_t ar_pln;         /* length of protocol address */
  44         ushort_t ar_op;         /* one of: */
  45 #define ARPOP_REQUEST   1       /* request to resolve address */
  46 #define ARPOP_REPLY     2       /* response to previous request */
  47 #define REVARP_REQUEST  3       /* Reverse ARP request */
  48 #define REVARP_REPLY    4       /* Reverse ARP reply */
  49         /*
  50          * The remaining fields are variable in size,
  51          * according to the sizes above, and are defined
  52          * as appropriate for specific hardware/protocol
  53          * combinations.  (E.g., see <netinet/if_ether.h>.)
  54          */
  55 #ifdef  notdef
  56         uchar_t ar_sha[];       /* sender hardware address */
  57         uchar_t ar_spa[];       /* sender protocol address */
  58         uchar_t ar_tha[];       /* target hardware address */
  59         uchar_t ar_tpa[];       /* target protocol address */
  60 #endif  /* notdef */
  61 };
  62
  63 /*
  64  * ARP ioctl request
  65  */
  66 struct arpreq {
  67         struct  sockaddr arp_pa;                /* protocol address */
  68         struct  sockaddr arp_ha;                /* hardware address */
  69         int     arp_flags;                      /* flags */
  70 };
  71 /*  arp_flags and at_flags field values */
  72 #define ATF_INUSE       0x01    /* entry in use */
  73 #define ATF_COM         0x02    /* completed entry (enaddr valid) */
  74 #define ATF_PERM        0x04    /* permanent entry */
  75 #define ATF_PUBL        0x08    /* publish entry (respond for other host) */
  76 #define ATF_USETRAILERS 0x10    /* has requested trailers */
  77
  78 /*
  79  * This data structure is used by kernel protocol modules to register
  80  * their interest in a particular packet type with the Ethernet drivers.
  81  * For example, other kinds of ARP would use this, XNS, ApleTalk, etc.
  82  */
  83 struct ether_family {
  84         int             ef_family;      /* address family */
  85         ushort_t        ef_ethertype;   /* ethernet type field */
  86         struct ifqueue *(*ef_infunc)(); /* input function */
  87         int             (*ef_outfunc)();        /* output function */
  88         int             (*ef_netisr)(); /* soft interrupt function */
  89         struct ether_family *ef_next;   /* link to next on list */
  90 };
  91
  92 #ifdef  __cplusplus
  93 }
  94 #endif
  95
  96 #endif  /* _net_if_arp_h */