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. Neither the name of the University nor the names of its contributors
  14  *    may be used to endorse or promote products derived from this software
  15  *    without specific prior written permission.
  16  *
  17  * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
  18  * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
  19  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
  20  * ARE DISCLAIMED.  IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
  21  * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
  22  * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
  23  * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
  24  * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
  25  * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
  26  * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
  27  * SUCH DAMAGE.
  28  *
  29  *      @(#)if_ether.h  8.3 (Berkeley) 5/2/95
  30  * $FreeBSD: src/sys/netinet/if_ether.h,v 1.24.2.1 2002/02/13 21:38:56 fjoe Exp $
  31  * $DragonFly: src/sys/netinet/if_ether.h,v 1.7 2007/08/16 20:03:57 dillon Exp $
  32  */
  33
  34 #ifndef _NETINET_IF_ETHER_H_
  35 #define _NETINET_IF_ETHER_H_
  36
  37 #ifndef _NET_ETHERNET_H_
  38 #include <net/ethernet.h>
  39 #endif
  40 #ifndef _NET_IF_ARP_H_
  41 #include <net/if_arp.h>
  42 #endif
  43 #ifndef _NETINET_IN_H_
  44 #include <netinet/in.h>
  45 #endif
  46
  47 /*
  48  * Macro to map an IP multicast address to an Ethernet multicast address.
  49  * The high-order 25 bits of the Ethernet address are statically assigned,
  50  * and the low-order 23 bits are taken from the low end of the IP address.
  51  */
  52 #define ETHER_MAP_IP_MULTICAST(ipaddr, enaddr) \
  53         /* struct in_addr *ipaddr; */ \
  54         /* u_char enaddr[ETHER_ADDR_LEN];          */ \
  55 { \
  56         (enaddr)[0] = 0x01; \
  57         (enaddr)[1] = 0x00; \
  58         (enaddr)[2] = 0x5e; \
  59         (enaddr)[3] = ((u_char *)ipaddr)[1] & 0x7f; \
  60         (enaddr)[4] = ((u_char *)ipaddr)[2]; \
  61         (enaddr)[5] = ((u_char *)ipaddr)[3]; \
  62 }
  63 /*
  64  * Macro to map an IP6 multicast address to an Ethernet multicast address.
  65  * The high-order 16 bits of the Ethernet address are statically assigned,
  66  * and the low-order 32 bits are taken from the low end of the IP6 address.
  67  */
  68 #define ETHER_MAP_IPV6_MULTICAST(ip6addr, enaddr)                       \
  69 /* struct       in6_addr *ip6addr; */                                   \
  70 /* u_char       enaddr[ETHER_ADDR_LEN]; */                              \
  71 {                                                                       \
  72         (enaddr)[0] = 0x33;                                             \
  73         (enaddr)[1] = 0x33;                                             \
  74         (enaddr)[2] = ((u_char *)ip6addr)[12];                          \
  75         (enaddr)[3] = ((u_char *)ip6addr)[13];                          \
  76         (enaddr)[4] = ((u_char *)ip6addr)[14];                          \
  77         (enaddr)[5] = ((u_char *)ip6addr)[15];                          \
  78 }
  79
  80 /*
  81  * Ethernet Address Resolution Protocol.
  82  *
  83  * See RFC 826 for protocol description.  Structure below is adapted
  84  * to resolving internet addresses.  Field names used correspond to
  85  * RFC 826.
  86  */
  87 struct  ether_arp {
  88         struct  arphdr ea_hdr;  /* fixed-size header */
  89         u_char  arp_sha[ETHER_ADDR_LEN];        /* sender hardware address */
  90         u_char  arp_spa[4];     /* sender protocol address */
  91         u_char  arp_tha[ETHER_ADDR_LEN];        /* target hardware address */
  92         u_char  arp_tpa[4];     /* target protocol address */
  93 };
  94 #define arp_hrd ea_hdr.ar_hrd
  95 #define arp_pro ea_hdr.ar_pro
  96 #define arp_hln ea_hdr.ar_hln
  97 #define arp_pln ea_hdr.ar_pln
  98 #define arp_op  ea_hdr.ar_op
  99
 100 struct sockaddr_inarp {
 101         u_char  sin_len;
 102         u_char  sin_family;
 103         u_short sin_port;
 104         struct  in_addr sin_addr;
 105         struct  in_addr sin_srcaddr;
 106         u_short sin_tos;
 107         u_short sin_other;
 108 #define SIN_PROXY 1
 109 };
 110 /*
 111  * IP and ethernet specific routing flags
 112  */
 113 #define RTF_USETRAILERS RTF_PROTO1      /* use trailers */
 114 #define RTF_ANNOUNCE    RTF_PROTO2      /* announce new arp entry */
 115
 116 #ifdef  _KERNEL
 117 extern u_char   ether_ipmulticast_min[ETHER_ADDR_LEN];
 118 extern u_char   ether_ipmulticast_max[ETHER_ADDR_LEN];
 119
 120 int     arpresolve (struct ifnet *, struct rtentry *, struct mbuf *,
 121                         struct sockaddr *, u_char *);
 122 void    arp_ifinit (struct ifnet *, struct ifaddr *);
 123 void    arp_gratuitous (struct ifnet *, struct ifaddr *);
 124 #endif
 125
 126 #endif