sysdeps/unix/sysv/linux/netinet/if_ether.h

   1 /* Copyright (C) 1996, 1997, 1999 Free Software Foundation, Inc.
   2    This file is part of the GNU C Library.
   3
   4    The GNU C Library is free software; you can redistribute it and/or
   5    modify it under the terms of the GNU Lesser General Public
   6    License as published by the Free Software Foundation; either
   7    version 2.1 of the License, or (at your option) any later version.
   8
   9    The GNU C Library is distributed in the hope that it will be useful,
  10    but WITHOUT ANY WARRANTY; without even the implied warranty of
  11    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
  12    Lesser General Public License for more details.
  13
  14    You should have received a copy of the GNU Lesser General Public
  15    License along with the GNU C Library; if not, write to the Free
  16    Software Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA
  17    02111-1307 USA.  */
  18
  19 #ifndef __NETINET_IF_ETHER_H
  20
  21 #define __NETINET_IF_ETHER_H    1
  22 #include <features.h>
  23 #include <sys/types.h>
  24
  25 /* Get definitions from kernel header file.  */
  26 #include <linux/if_ether.h>
  27
  28 #ifdef __USE_BSD
  29 /*
  30  * Copyright (c) 1982, 1986, 1993
  31  *      The Regents of the University of California.  All rights reserved.
  32  *
  33  * Redistribution and use in source and binary forms, with or without
  34  * modification, are permitted provided that the following conditions
  35  * are met:
  36  * 1. Redistributions of source code must retain the above copyright
  37  *    notice, this list of conditions and the following disclaimer.
  38  * 2. Redistributions in binary form must reproduce the above copyright
  39  *    notice, this list of conditions and the following disclaimer in the
  40  *    documentation and/or other materials provided with the distribution.
  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_ether.h  8.3 (Berkeley) 5/2/95
  58  *      $FreeBSD$
  59  */
  60
  61 #include <net/ethernet.h>
  62 #include <net/if_arp.h>
  63
  64 __BEGIN_DECLS
  65 /*
  66  * Ethernet Address Resolution Protocol.
  67  *
  68  * See RFC 826 for protocol description.  Structure below is adapted
  69  * to resolving internet addresses.  Field names used correspond to
  70  * RFC 826.
  71  */
  72 struct  ether_arp {
  73         struct  arphdr ea_hdr;          /* fixed-size header */
  74         u_int8_t arp_sha[ETH_ALEN];     /* sender hardware address */
  75         u_int8_t arp_spa[4];            /* sender protocol address */
  76         u_int8_t arp_tha[ETH_ALEN];     /* target hardware address */
  77         u_int8_t arp_tpa[4];            /* target protocol address */
  78 };
  79 #define arp_hrd ea_hdr.ar_hrd
  80 #define arp_pro ea_hdr.ar_pro
  81 #define arp_hln ea_hdr.ar_hln
  82 #define arp_pln ea_hdr.ar_pln
  83 #define arp_op  ea_hdr.ar_op
  84
  85 /*
  86  * Macro to map an IP multicast address to an Ethernet multicast address.
  87  * The high-order 25 bits of the Ethernet address are statically assigned,
  88  * and the low-order 23 bits are taken from the low end of the IP address.
  89  */
  90 #define ETHER_MAP_IP_MULTICAST(ipaddr, enaddr) \
  91         /* struct in_addr *ipaddr; */ \
  92         /* u_char enaddr[ETH_ALEN];        */ \
  93 { \
  94         (enaddr)[0] = 0x01; \
  95         (enaddr)[1] = 0x00; \
  96         (enaddr)[2] = 0x5e; \
  97         (enaddr)[3] = ((u_int8_t *)ipaddr)[1] & 0x7f; \
  98         (enaddr)[4] = ((u_int8_t *)ipaddr)[2]; \
  99         (enaddr)[5] = ((u_int8_t *)ipaddr)[3]; \
 100 }
 101
 102 __END_DECLS
 103 #endif /* __USE_BSD */
 104
 105 #endif /* netinet/if_ether.h */