bsd/netinet/if_ether.h

   1 /*
   2  * Copyright (c) 2000 Apple Computer, Inc. All rights reserved.
   3  *
   4  * @APPLE_LICENSE_HEADER_START@
   5  *
   6  * This file contains Original Code and/or Modifications of Original Code
   7  * as defined in and that are subject to the Apple Public Source License
   8  * Version 2.0 (the 'License'). You may not use this file except in
   9  * compliance with the License. Please obtain a copy of the License at
  10  * http://www.opensource.apple.com/apsl/ and read it before using this
  11  * file.
  12  *
  13  * The Original Code and all software distributed under the License are
  14  * distributed on an 'AS IS' basis, WITHOUT WARRANTY OF ANY KIND, EITHER
  15  * EXPRESS OR IMPLIED, AND APPLE HEREBY DISCLAIMS ALL SUCH WARRANTIES,
  16  * INCLUDING WITHOUT LIMITATION, ANY WARRANTIES OF MERCHANTABILITY,
  17  * FITNESS FOR A PARTICULAR PURPOSE, QUIET ENJOYMENT OR NON-INFRINGEMENT.
  18  * Please see the License for the specific language governing rights and
  19  * limitations under the License.
  20  *
  21  * @APPLE_LICENSE_HEADER_END@
  22  */
  23 /*
  24  * Copyright (c) 1982, 1986, 1993
  25  *      The Regents of the University of California.  All rights reserved.
  26  *
  27  * Redistribution and use in source and binary forms, with or without
  28  * modification, are permitted provided that the following conditions
  29  * are met:
  30  * 1. Redistributions of source code must retain the above copyright
  31  *    notice, this list of conditions and the following disclaimer.
  32  * 2. Redistributions in binary form must reproduce the above copyright
  33  *    notice, this list of conditions and the following disclaimer in the
  34  *    documentation and/or other materials provided with the distribution.
  35  * 3. All advertising materials mentioning features or use of this software
  36  *    must display the following acknowledgement:
  37  *      This product includes software developed by the University of
  38  *      California, Berkeley and its contributors.
  39  * 4. Neither the name of the University nor the names of its contributors
  40  *    may be used to endorse or promote products derived from this software
  41  *    without specific prior written permission.
  42  *
  43  * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
  44  * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
  45  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
  46  * ARE DISCLAIMED.  IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
  47  * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
  48  * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
  49  * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
  50  * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
  51  * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
  52  * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
  53  * SUCH DAMAGE.
  54  *
  55  *      @(#)if_ether.h  8.3 (Berkeley) 5/2/95
  56  * $FreeBSD: src/sys/netinet/if_ether.h,v 1.24 1999/12/29 04:40:58 peter Exp $
  57  */
  58
  59 #ifndef _NETINET_IF_ETHER_H_
  60 #define _NETINET_IF_ETHER_H_
  61 #include <sys/appleapiopts.h>
  62
  63 #include <net/ethernet.h>
  64
  65 #include <netinet/in.h>
  66 #include <net/if_arp.h>
  67 #define ea_byte ether_addr_octet
  68
  69 /*
  70  * Macro to map an IP multicast address to an Ethernet multicast address.
  71  * The high-order 25 bits of the Ethernet address are statically assigned,
  72  * and the low-order 23 bits are taken from the low end of the IP address.
  73  */
  74 #define ETHER_MAP_IP_MULTICAST(ipaddr, enaddr) \
  75         /* struct in_addr *ipaddr; */ \
  76         /* u_char enaddr[ETHER_ADDR_LEN];          */ \
  77 { \
  78         (enaddr)[0] = 0x01; \
  79         (enaddr)[1] = 0x00; \
  80         (enaddr)[2] = 0x5e; \
  81         (enaddr)[3] = ((const u_char *)ipaddr)[1] & 0x7f; \
  82         (enaddr)[4] = ((const u_char *)ipaddr)[2]; \
  83         (enaddr)[5] = ((const u_char *)ipaddr)[3]; \
  84 }
  85 /*
  86  * Macro to map an IP6 multicast address to an Ethernet multicast address.
  87  * The high-order 16 bits of the Ethernet address are statically assigned,
  88  * and the low-order 32 bits are taken from the low end of the IP6 address.
  89  */
  90 #define ETHER_MAP_IPV6_MULTICAST(ip6addr, enaddr)                       \
  91 /* struct       in6_addr *ip6addr; */                                   \
  92 /* u_char       enaddr[ETHER_ADDR_LEN]; */                              \
  93 {                                                                       \
  94         (enaddr)[0] = 0x33;                                             \
  95         (enaddr)[1] = 0x33;                                             \
  96         (enaddr)[2] = ((const u_char *)ip6addr)[12];                            \
  97         (enaddr)[3] = ((const u_char *)ip6addr)[13];                            \
  98         (enaddr)[4] = ((const u_char *)ip6addr)[14];                            \
  99         (enaddr)[5] = ((const u_char *)ip6addr)[15];                            \
 100 }
 101
 102 /*
 103  * Ethernet Address Resolution Protocol.
 104  *
 105  * See RFC 826 for protocol description.  Structure below is adapted
 106  * to resolving internet addresses.  Field names used correspond to
 107  * RFC 826.
 108  */
 109 struct  ether_arp {
 110         struct  arphdr ea_hdr;  /* fixed-size header */
 111         u_char  arp_sha[ETHER_ADDR_LEN];        /* sender hardware address */
 112         u_char  arp_spa[4];     /* sender protocol address */
 113         u_char  arp_tha[ETHER_ADDR_LEN];        /* target hardware address */
 114         u_char  arp_tpa[4];     /* target protocol address */
 115 };
 116 #define arp_hrd ea_hdr.ar_hrd
 117 #define arp_pro ea_hdr.ar_pro
 118 #define arp_hln ea_hdr.ar_hln
 119 #define arp_pln ea_hdr.ar_pln
 120 #define arp_op  ea_hdr.ar_op
 121
 122 struct sockaddr_inarp {
 123         u_char  sin_len;
 124         u_char  sin_family;
 125         u_short sin_port;
 126         struct  in_addr sin_addr;
 127         struct  in_addr sin_srcaddr;
 128         u_short sin_tos;
 129         u_short sin_other;
 130 #define SIN_PROXY 1
 131 };
 132 /*
 133  * IP and ethernet specific routing flags
 134  */
 135 #define RTF_USETRAILERS RTF_PROTO1      /* use trailers */
 136 #define RTF_ANNOUNCE    RTF_PROTO2      /* announce new arp entry */
 137
 138 #ifdef KERNEL_PRIVATE
 139 extern u_char   ether_ipmulticast_min[ETHER_ADDR_LEN];
 140 extern u_char   ether_ipmulticast_max[ETHER_ADDR_LEN];
 141 extern struct   ifqueue arpintrq;
 142
 143 int     arpresolve(struct ifnet *, struct rtentry *, struct mbuf *,
 144                         struct sockaddr *, u_char *, struct rtentry *);
 145 void    arp_ifinit(struct ifnet *, struct ifaddr *);
 146 #endif KERNEL_PRIVATE
 147
 148 #endif _NETINET_IF_ETHER_H_