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

   1 /* Copyright (C) 1996-2015 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, see
  16    <http://www.gnu.org/licenses/>.  */
  17
  18 #ifndef __NETINET_IF_ETHER_H
  19
  20 #define __NETINET_IF_ETHER_H    1
  21 #include <features.h>
  22 #include <sys/types.h>
  23
  24 /* Get definitions from kernel header file.  */
  25 #include <linux/if_ether.h>
  26
  27 #ifdef __USE_MISC
  28 /*
  29  * Copyright (c) 1982, 1986, 1993
  30  *      The Regents of the University of California.  All rights reserved.
  31  *
  32  * Redistribution and use in source and binary forms, with or without
  33  * modification, are permitted provided that the following conditions
  34  * are met:
  35  * 1. Redistributions of source code must retain the above copyright
  36  *    notice, this list of conditions and the following disclaimer.
  37  * 2. Redistributions in binary form must reproduce the above copyright
  38  *    notice, this list of conditions and the following disclaimer in the
  39  *    documentation and/or other materials provided with the distribution.
  40  * 4. Neither the name of the University nor the names of its contributors
  41  *    may be used to endorse or promote products derived from this software
  42  *    without specific prior written permission.
  43  *
  44  * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
  45  * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
  46  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
  47  * ARE DISCLAIMED.  IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
  48  * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
  49  * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
  50  * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
  51  * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
  52  * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
  53  * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
  54  * SUCH DAMAGE.
  55  *
  56  *      @(#)if_ether.h  8.3 (Berkeley) 5/2/95
  57  *      $FreeBSD$
  58  */
  59
  60 #include <net/ethernet.h>
  61 #include <net/if_arp.h>
  62
  63 __BEGIN_DECLS
  64 /*
  65  * Ethernet Address Resolution Protocol.
  66  *
  67  * See RFC 826 for protocol description.  Structure below is adapted
  68  * to resolving internet addresses.  Field names used correspond to
  69  * RFC 826.
  70  */
  71 struct  ether_arp {
  72         struct  arphdr ea_hdr;          /* fixed-size header */
  73         u_int8_t arp_sha[ETH_ALEN];     /* sender hardware address */
  74         u_int8_t arp_spa[4];            /* sender protocol address */
  75         u_int8_t arp_tha[ETH_ALEN];     /* target hardware address */
  76         u_int8_t arp_tpa[4];            /* target protocol address */
  77 };
  78 #define arp_hrd ea_hdr.ar_hrd
  79 #define arp_pro ea_hdr.ar_pro
  80 #define arp_hln ea_hdr.ar_hln
  81 #define arp_pln ea_hdr.ar_pln
  82 #define arp_op  ea_hdr.ar_op
  83
  84 /*
  85  * Macro to map an IP multicast address to an Ethernet multicast address.
  86  * The high-order 25 bits of the Ethernet address are statically assigned,
  87  * and the low-order 23 bits are taken from the low end of the IP address.
  88  */
  89 #define ETHER_MAP_IP_MULTICAST(ipaddr, enaddr) \
  90         /* struct in_addr *ipaddr; */ \
  91         /* u_char enaddr[ETH_ALEN];        */ \
  92 { \
  93         (enaddr)[0] = 0x01; \
  94         (enaddr)[1] = 0x00; \
  95         (enaddr)[2] = 0x5e; \
  96         (enaddr)[3] = ((u_int8_t *)ipaddr)[1] & 0x7f; \
  97         (enaddr)[4] = ((u_int8_t *)ipaddr)[2]; \
  98         (enaddr)[5] = ((u_int8_t *)ipaddr)[3]; \
  99 }
 100
 101 __END_DECLS
 102 #endif /* __USE_MISC */
 103
 104 #endif /* netinet/if_ether.h */