bsd/net/if_arp.h

   1 /*
   2  * Copyright (c) 2000 Apple Computer, Inc. All rights reserved.
   3  *
   4  * @APPLE_LICENSE_HEADER_START@
   5  *
   6  * Copyright (c) 1999-2003 Apple Computer, Inc.  All Rights Reserved.
   7  *
   8  * This file contains Original Code and/or Modifications of Original Code
   9  * as defined in and that are subject to the Apple Public Source License
  10  * Version 2.0 (the 'License'). You may not use this file except in
  11  * compliance with the License. Please obtain a copy of the License at
  12  * http://www.opensource.apple.com/apsl/ and read it before using this
  13  * file.
  14  *
  15  * The Original Code and all software distributed under the License are
  16  * distributed on an 'AS IS' basis, WITHOUT WARRANTY OF ANY KIND, EITHER
  17  * EXPRESS OR IMPLIED, AND APPLE HEREBY DISCLAIMS ALL SUCH WARRANTIES,
  18  * INCLUDING WITHOUT LIMITATION, ANY WARRANTIES OF MERCHANTABILITY,
  19  * FITNESS FOR A PARTICULAR PURPOSE, QUIET ENJOYMENT OR NON-INFRINGEMENT.
  20  * Please see the License for the specific language governing rights and
  21  * limitations under the License.
  22  *
  23  * @APPLE_LICENSE_HEADER_END@
  24  */
  25 /*
  26  * Copyright (c) 1986, 1993
  27  *      The Regents of the University of California.  All rights reserved.
  28  *
  29  * Redistribution and use in source and binary forms, with or without
  30  * modification, are permitted provided that the following conditions
  31  * are met:
  32  * 1. Redistributions of source code must retain the above copyright
  33  *    notice, this list of conditions and the following disclaimer.
  34  * 2. Redistributions in binary form must reproduce the above copyright
  35  *    notice, this list of conditions and the following disclaimer in the
  36  *    documentation and/or other materials provided with the distribution.
  37  * 3. All advertising materials mentioning features or use of this software
  38  *    must display the following acknowledgement:
  39  *      This product includes software developed by the University of
  40  *      California, Berkeley and its contributors.
  41  * 4. Neither the name of the University nor the names of its contributors
  42  *    may be used to endorse or promote products derived from this software
  43  *    without specific prior written permission.
  44  *
  45  * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
  46  * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
  47  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
  48  * ARE DISCLAIMED.  IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
  49  * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
  50  * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
  51  * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
  52  * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
  53  * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
  54  * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
  55  * SUCH DAMAGE.
  56  *
  57  *      @(#)if_arp.h    8.1 (Berkeley) 6/10/93
  58  * $FreeBSD: src/sys/net/if_arp.h,v 1.14.2.1 2000/07/11 20:46:55 archie Exp $
  59  */
  60
  61 #ifndef _NET_IF_ARP_H_
  62 #define _NET_IF_ARP_H_
  63 #include <sys/appleapiopts.h>
  64 #include <netinet/in.h>
  65
  66 /*
  67  * Address Resolution Protocol.
  68  *
  69  * See RFC 826 for protocol description.  ARP packets are variable
  70  * in size; the arphdr structure defines the fixed-length portion.
  71  * Protocol type values are the same as those for 10 Mb/s Ethernet.
  72  * It is followed by the variable-sized fields ar_sha, arp_spa,
  73  * arp_tha and arp_tpa in that order, according to the lengths
  74  * specified.  Field names used correspond to RFC 826.
  75  */
  76 struct  arphdr {
  77         u_short ar_hrd;         /* format of hardware address */
  78 #define ARPHRD_ETHER    1       /* ethernet hardware format */
  79 #define ARPHRD_IEEE802  6       /* token-ring hardware format */
  80 #define ARPHRD_FRELAY   15      /* frame relay hardware format */
  81         u_short ar_pro;         /* format of protocol address */
  82         u_char  ar_hln;         /* length of hardware address */
  83         u_char  ar_pln;         /* length of protocol address */
  84         u_short ar_op;          /* one of: */
  85 #define ARPOP_REQUEST   1       /* request to resolve address */
  86 #define ARPOP_REPLY     2       /* response to previous request */
  87 #define ARPOP_REVREQUEST 3      /* request protocol address given hardware */
  88 #define ARPOP_REVREPLY  4       /* response giving protocol address */
  89 #define ARPOP_INVREQUEST 8      /* request to identify peer */
  90 #define ARPOP_INVREPLY  9       /* response identifying peer */
  91 /*
  92  * The remaining fields are variable in size,
  93  * according to the sizes above.
  94  */
  95 #ifdef COMMENT_ONLY
  96         u_char  ar_sha[];       /* sender hardware address */
  97         u_char  ar_spa[];       /* sender protocol address */
  98         u_char  ar_tha[];       /* target hardware address */
  99         u_char  ar_tpa[];       /* target protocol address */
 100 #endif
 101 };
 102
 103 /*
 104  * ARP ioctl request
 105  */
 106 struct arpreq {
 107         struct  sockaddr arp_pa;                /* protocol address */
 108         struct  sockaddr arp_ha;                /* hardware address */
 109         int     arp_flags;                      /* flags */
 110 };
 111 /*  arp_flags and at_flags field values */
 112 #define ATF_INUSE       0x01    /* entry in use */
 113 #define ATF_COM         0x02    /* completed entry (enaddr valid) */
 114 #define ATF_PERM        0x04    /* permanent entry */
 115 #define ATF_PUBL        0x08    /* publish entry (respond for other host) */
 116 #define ATF_USETRAILERS 0x10    /* has requested trailers */
 117
 118 #ifdef __APPLE_API_UNSTABLE
 119
 120 #ifdef __APPLE__
 121 /*
 122  * Ethernet multicast address structure.  There is one of these for each
 123  * multicast address or range of multicast addresses that we are supposed
 124  * to listen to on a particular interface.  They are kept in a linked list,
 125  * rooted in the interface's arpcom structure.  (This really has nothing to
 126  * do with ARP, or with the Internet address family, but this appears to be
 127  * the minimally-disrupting place to put it.)
 128  */
 129 struct ether_multi {
 130         u_char  enm_addrlo[6];          /* low  or only address of range */
 131         u_char  enm_addrhi[6];          /* high or only address of range */
 132         struct  arpcom *enm_ac;         /* back pointer to arpcom */
 133         u_int   enm_refcount;           /* no. claims to this addr/range */
 134         struct  ether_multi *enm_next;  /* ptr to next ether_multi */
 135 };
 136
 137 /*
 138  * Structure used by macros below to remember position when stepping through
 139  * all of the ether_multi records.
 140  */
 141 struct ether_multistep {
 142         struct ether_multi  *e_enm;
 143 };
 144 #endif /* __APPLE__ */
 145
 146 #ifdef KERNEL
 147 /*
 148  * Structure shared between the ethernet driver modules and
 149  * the address resolution code.  For example, each ec_softc or il_softc
 150  * begins with this structure.
 151  */
 152 struct  arpcom {
 153         /*
 154          * The ifnet struct _must_ be at the head of this structure.
 155          */
 156         struct  ifnet ac_if;            /* network-visible interface */
 157         u_char  ac_enaddr[6];           /* ethernet hardware address */
 158 #ifdef __APPLE__
 159         struct  in_addr ac_ipaddr;      /* copy of ip address- XXX */
 160         struct  ether_multi *ac_multiaddrs; /* list of ether multicast addrs */
 161 #endif
 162         int     ac_multicnt;            /* length of ac_multiaddrs list */
 163 #ifndef __APPLE__
 164         void    *ac_netgraph;           /* ng_ether(4) netgraph node info */
 165 #endif
 166 };
 167
 168
 169 #endif
 170 #endif /* __APPLE_API_UNSTABLE */
 171
 172 #endif /* !_NET_IF_ARP_H_ */