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 1.7 2007/08/16 20:03:57 dillon Exp $
  36  */
  37
  38 #ifndef _NETINET_IF_ETHER_H_
  39 #define _NETINET_IF_ETHER_H_
  40
  41 #ifndef _NET_ETHERNET_H_
  42 #include <net/ethernet.h>
  43 #endif
  44 #ifndef _NET_IF_ARP_H_
  45 #include <net/if_arp.h>
  46 #endif
  47 #ifndef _NETINET_IN_H_
  48 #include <netinet/in.h>
  49 #endif
  50
  51 /*
  52  * Macro to map an IP multicast address to an Ethernet multicast address.
  53  * The high-order 25 bits of the Ethernet address are statically assigned,
  54  * and the low-order 23 bits are taken from the low end of the IP address.
  55  */
  56 #define ETHER_MAP_IP_MULTICAST(ipaddr, enaddr) \
  57         /* struct in_addr *ipaddr; */ \
  58         /* u_char enaddr[ETHER_ADDR_LEN];          */ \
  59 { \
  60         (enaddr)[0] = 0x01; \
  61         (enaddr)[1] = 0x00; \
  62         (enaddr)[2] = 0x5e; \
  63         (enaddr)[3] = ((u_char *)ipaddr)[1] & 0x7f; \
  64         (enaddr)[4] = ((u_char *)ipaddr)[2]; \
  65         (enaddr)[5] = ((u_char *)ipaddr)[3]; \
  66 }
  67 /*
  68  * Macro to map an IP6 multicast address to an Ethernet multicast address.
  69  * The high-order 16 bits of the Ethernet address are statically assigned,
  70  * and the low-order 32 bits are taken from the low end of the IP6 address.
  71  */
  72 #define ETHER_MAP_IPV6_MULTICAST(ip6addr, enaddr)                       \
  73 /* struct       in6_addr *ip6addr; */                                   \
  74 /* u_char       enaddr[ETHER_ADDR_LEN]; */                              \
  75 {                                                                       \
  76         (enaddr)[0] = 0x33;                                             \
  77         (enaddr)[1] = 0x33;                                             \
  78         (enaddr)[2] = ((u_char *)ip6addr)[12];                          \
  79         (enaddr)[3] = ((u_char *)ip6addr)[13];                          \
  80         (enaddr)[4] = ((u_char *)ip6addr)[14];                          \
  81         (enaddr)[5] = ((u_char *)ip6addr)[15];                          \
  82 }
  83
  84 /*
  85  * Ethernet Address Resolution Protocol.
  86  *
  87  * See RFC 826 for protocol description.  Structure below is adapted
  88  * to resolving internet addresses.  Field names used correspond to
  89  * RFC 826.
  90  */
  91 struct  ether_arp {
  92         struct  arphdr ea_hdr;  /* fixed-size header */
  93         u_char  arp_sha[ETHER_ADDR_LEN];        /* sender hardware address */
  94         u_char  arp_spa[4];     /* sender protocol address */
  95         u_char  arp_tha[ETHER_ADDR_LEN];        /* target hardware address */
  96         u_char  arp_tpa[4];     /* target protocol address */
  97 };
  98 #define arp_hrd ea_hdr.ar_hrd
  99 #define arp_pro ea_hdr.ar_pro
 100 #define arp_hln ea_hdr.ar_hln
 101 #define arp_pln ea_hdr.ar_pln
 102 #define arp_op  ea_hdr.ar_op
 103
 104 struct sockaddr_inarp {
 105         u_char  sin_len;
 106         u_char  sin_family;
 107         u_short sin_port;
 108         struct  in_addr sin_addr;
 109         struct  in_addr sin_srcaddr;
 110         u_short sin_tos;
 111         u_short sin_other;
 112 #define SIN_PROXY 1
 113 };
 114 /*
 115  * IP and ethernet specific routing flags
 116  */
 117 #define RTF_USETRAILERS RTF_PROTO1      /* use trailers */
 118 #define RTF_ANNOUNCE    RTF_PROTO2      /* announce new arp entry */
 119
 120 #ifdef  _KERNEL
 121 extern u_char   ether_ipmulticast_min[ETHER_ADDR_LEN];
 122 extern u_char   ether_ipmulticast_max[ETHER_ADDR_LEN];
 123
 124 int     arpresolve (struct ifnet *, struct rtentry *, struct mbuf *,
 125                         struct sockaddr *, u_char *);
 126 void    arp_ifinit (struct ifnet *, struct ifaddr *);
 127 void    arp_ifinit2 (struct ifnet *, struct ifaddr *, u_char *);
 128 #endif
 129
 130 #endif