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  * 4. 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  * $FreeBSD$
  31  */
  32
  33 #ifndef _NETINET_IF_ETHER_H_
  34 #define _NETINET_IF_ETHER_H_
  35
  36 #include <net/ethernet.h>
  37 #include <net/if_arp.h>
  38
  39 /*
  40  * Macro to map an IP multicast address to an Ethernet multicast address.
  41  * The high-order 25 bits of the Ethernet address are statically assigned,
  42  * and the low-order 23 bits are taken from the low end of the IP address.
  43  */
  44 #define ETHER_MAP_IP_MULTICAST(ipaddr, enaddr) \
  45         /* struct in_addr *ipaddr; */ \
  46         /* u_char enaddr[ETHER_ADDR_LEN];          */ \
  47 { \
  48         (enaddr)[0] = 0x01; \
  49         (enaddr)[1] = 0x00; \
  50         (enaddr)[2] = 0x5e; \
  51         (enaddr)[3] = ((u_char *)ipaddr)[1] & 0x7f; \
  52         (enaddr)[4] = ((u_char *)ipaddr)[2]; \
  53         (enaddr)[5] = ((u_char *)ipaddr)[3]; \
  54 }
  55 /*
  56  * Macro to map an IP6 multicast address to an Ethernet multicast address.
  57  * The high-order 16 bits of the Ethernet address are statically assigned,
  58  * and the low-order 32 bits are taken from the low end of the IP6 address.
  59  */
  60 #define ETHER_MAP_IPV6_MULTICAST(ip6addr, enaddr)                       \
  61 /* struct       in6_addr *ip6addr; */                                   \
  62 /* u_char       enaddr[ETHER_ADDR_LEN]; */                              \
  63 {                                                                       \
  64         (enaddr)[0] = 0x33;                                             \
  65         (enaddr)[1] = 0x33;                                             \
  66         (enaddr)[2] = ((u_char *)ip6addr)[12];                          \
  67         (enaddr)[3] = ((u_char *)ip6addr)[13];                          \
  68         (enaddr)[4] = ((u_char *)ip6addr)[14];                          \
  69         (enaddr)[5] = ((u_char *)ip6addr)[15];                          \
  70 }
  71
  72 /*
  73  * Ethernet Address Resolution Protocol.
  74  *
  75  * See RFC 826 for protocol description.  Structure below is adapted
  76  * to resolving internet addresses.  Field names used correspond to
  77  * RFC 826.
  78  */
  79 struct  ether_arp {
  80         struct  arphdr ea_hdr;  /* fixed-size header */
  81         u_char  arp_sha[ETHER_ADDR_LEN];        /* sender hardware address */
  82         u_char  arp_spa[4];     /* sender protocol address */
  83         u_char  arp_tha[ETHER_ADDR_LEN];        /* target hardware address */
  84         u_char  arp_tpa[4];     /* target protocol address */
  85 };
  86 #define arp_hrd ea_hdr.ar_hrd
  87 #define arp_pro ea_hdr.ar_pro
  88 #define arp_hln ea_hdr.ar_hln
  89 #define arp_pln ea_hdr.ar_pln
  90 #define arp_op  ea_hdr.ar_op
  91
  92 struct sockaddr_inarp {
  93         u_char  sin_len;
  94         u_char  sin_family;
  95         u_short sin_port;
  96         struct  in_addr sin_addr;
  97         struct  in_addr sin_srcaddr;
  98         u_short sin_tos;
  99         u_short sin_other;
 100 #define SIN_PROXY 1
 101 };
 102 /*
 103  * IP and ethernet specific routing flags
 104  */
 105 #define RTF_USETRAILERS RTF_PROTO1      /* use trailers */
 106 #define RTF_ANNOUNCE    RTF_PROTO2      /* announce new arp entry */
 107
 108 #ifdef  _KERNEL
 109 extern u_char   ether_ipmulticast_min[ETHER_ADDR_LEN];
 110 extern u_char   ether_ipmulticast_max[ETHER_ADDR_LEN];
 111
 112 int     arpresolve(struct ifnet *ifp, struct rtentry *rt,
 113                 struct mbuf *m, struct sockaddr *dst, u_char *desten);
 114 void    arp_ifinit(struct ifnet *, struct ifaddr *);
 115 void    arp_ifinit2(struct ifnet *, struct ifaddr *, u_char *);
 116 #endif
 117
 118 #endif