sys/netinet/if_ether.h

   1 /*
   2  * Copyright (c) 1982, 1986, 1993
   3  *      The Regents of the University of California.  All rights reserved.
   4  *
   5  * Redistribution and use in source and binary forms, with or without
   6  * modification, are permitted provided that the following conditions
   7  * are met:
   8  * 1. Redistributions of source code must retain the above copyright
   9  *    notice, this list of conditions and the following disclaimer.
  10  * 2. Redistributions in binary form must reproduce the above copyright
  11  *    notice, this list of conditions and the following disclaimer in the
  12  *    documentation and/or other materials provided with the distribution.
  13  * 3. All advertising materials mentioning features or use of this software
  14  *    must display the following acknowledgement:
  15  *      This product includes software developed by the University of
  16  *      California, Berkeley and its contributors.
  17  * 4. Neither the name of the University nor the names of its contributors
  18  *    may be used to endorse or promote products derived from this software
  19  *    without specific prior written permission.
  20  *
  21  * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
  22  * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
  23  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
  24  * ARE DISCLAIMED.  IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
  25  * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
  26  * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
  27  * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
  28  * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
  29  * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
  30  * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
  31  * SUCH DAMAGE.
  32  *
  33  *      @(#)if_ether.h  8.3 (Berkeley) 5/2/95
  34  * $FreeBSD: src/sys/netinet/if_ether.h,v 1.24.2.1 2002/02/13 21:38:56 fjoe Exp $
  35  * $DragonFly: src/sys/netinet/if_ether.h,v 1.5 2004/12/21 02:54:15 hsu Exp $
  36  */
  37
  38 #ifndef _NETINET_IF_ETHER_H_
  39 #define _NETINET_IF_ETHER_H_
  40
  41 #include <net/ethernet.h>
  42 #include <net/if_arp.h>
  43
  44 /*
  45  * Macro to map an IP multicast address to an Ethernet multicast address.
  46  * The high-order 25 bits of the Ethernet address are statically assigned,
  47  * and the low-order 23 bits are taken from the low end of the IP address.
  48  */
  49 #define ETHER_MAP_IP_MULTICAST(ipaddr, enaddr) \
  50         /* struct in_addr *ipaddr; */ \
  51         /* u_char enaddr[ETHER_ADDR_LEN];          */ \
  52 { \
  53         (enaddr)[0] = 0x01; \
  54         (enaddr)[1] = 0x00; \
  55         (enaddr)[2] = 0x5e; \
  56         (enaddr)[3] = ((u_char *)ipaddr)[1] & 0x7f; \
  57         (enaddr)[4] = ((u_char *)ipaddr)[2]; \
  58         (enaddr)[5] = ((u_char *)ipaddr)[3]; \
  59 }
  60 /*
  61  * Macro to map an IP6 multicast address to an Ethernet multicast address.
  62  * The high-order 16 bits of the Ethernet address are statically assigned,
  63  * and the low-order 32 bits are taken from the low end of the IP6 address.
  64  */
  65 #define ETHER_MAP_IPV6_MULTICAST(ip6addr, enaddr)                       \
  66 /* struct       in6_addr *ip6addr; */                                   \
  67 /* u_char       enaddr[ETHER_ADDR_LEN]; */                              \
  68 {                                                                       \
  69         (enaddr)[0] = 0x33;                                             \
  70         (enaddr)[1] = 0x33;                                             \
  71         (enaddr)[2] = ((u_char *)ip6addr)[12];                          \
  72         (enaddr)[3] = ((u_char *)ip6addr)[13];                          \
  73         (enaddr)[4] = ((u_char *)ip6addr)[14];                          \
  74         (enaddr)[5] = ((u_char *)ip6addr)[15];                          \
  75 }
  76
  77 /*
  78  * Ethernet Address Resolution Protocol.
  79  *
  80  * See RFC 826 for protocol description.  Structure below is adapted
  81  * to resolving internet addresses.  Field names used correspond to
  82  * RFC 826.
  83  */
  84 struct  ether_arp {
  85         struct  arphdr ea_hdr;  /* fixed-size header */
  86         u_char  arp_sha[ETHER_ADDR_LEN];        /* sender hardware address */
  87         u_char  arp_spa[4];     /* sender protocol address */
  88         u_char  arp_tha[ETHER_ADDR_LEN];        /* target hardware address */
  89         u_char  arp_tpa[4];     /* target protocol address */
  90 };
  91 #define arp_hrd ea_hdr.ar_hrd
  92 #define arp_pro ea_hdr.ar_pro
  93 #define arp_hln ea_hdr.ar_hln
  94 #define arp_pln ea_hdr.ar_pln
  95 #define arp_op  ea_hdr.ar_op
  96
  97 struct sockaddr_inarp {
  98         u_char  sin_len;
  99         u_char  sin_family;
 100         u_short sin_port;
 101         struct  in_addr sin_addr;
 102         struct  in_addr sin_srcaddr;
 103         u_short sin_tos;
 104         u_short sin_other;
 105 #define SIN_PROXY 1
 106 };
 107 /*
 108  * IP and ethernet specific routing flags
 109  */
 110 #define RTF_USETRAILERS RTF_PROTO1      /* use trailers */
 111 #define RTF_ANNOUNCE    RTF_PROTO2      /* announce new arp entry */
 112
 113 #ifdef  _KERNEL
 114 extern u_char   ether_ipmulticast_min[ETHER_ADDR_LEN];
 115 extern u_char   ether_ipmulticast_max[ETHER_ADDR_LEN];
 116
 117 int     arpresolve (struct ifnet *, struct rtentry *, struct mbuf *,
 118                         struct sockaddr *, u_char *);
 119 void    arp_ifinit (struct ifnet *, struct ifaddr *);
 120 #endif
 121
 122 #endif