bsd/netinet/if_ether.h

   1 /*
   2  * Copyright (c) 2006 Apple Computer, Inc. All Rights Reserved.
   3  *
   4  * @APPLE_LICENSE_OSREFERENCE_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.  The rights granted to you under the
  10  * License may not be used to create, or enable the creation or
  11  * redistribution of, unlawful or unlicensed copies of an Apple operating
  12  * system, or to circumvent, violate, or enable the circumvention or
  13  * violation of, any terms of an Apple operating system software license
  14  * agreement.
  15  *
  16  * Please obtain a copy of the License at
  17  * http://www.opensource.apple.com/apsl/ and read it before using this
  18  * file.
  19  *
  20  * The Original Code and all software distributed under the License are
  21  * distributed on an 'AS IS' basis, WITHOUT WARRANTY OF ANY KIND, EITHER
  22  * EXPRESS OR IMPLIED, AND APPLE HEREBY DISCLAIMS ALL SUCH WARRANTIES,
  23  * INCLUDING WITHOUT LIMITATION, ANY WARRANTIES OF MERCHANTABILITY,
  24  * FITNESS FOR A PARTICULAR PURPOSE, QUIET ENJOYMENT OR NON-INFRINGEMENT.
  25  * Please see the License for the specific language governing rights and
  26  * limitations under the License.
  27  *
  28  * @APPLE_LICENSE_OSREFERENCE_HEADER_END@
  29  */
  30 /*
  31  * Copyright (c) 1982, 1986, 1993
  32  *      The Regents of the University of California.  All rights reserved.
  33  *
  34  * Redistribution and use in source and binary forms, with or without
  35  * modification, are permitted provided that the following conditions
  36  * are met:
  37  * 1. Redistributions of source code must retain the above copyright
  38  *    notice, this list of conditions and the following disclaimer.
  39  * 2. Redistributions in binary form must reproduce the above copyright
  40  *    notice, this list of conditions and the following disclaimer in the
  41  *    documentation and/or other materials provided with the distribution.
  42  * 3. All advertising materials mentioning features or use of this software
  43  *    must display the following acknowledgement:
  44  *      This product includes software developed by the University of
  45  *      California, Berkeley and its contributors.
  46  * 4. Neither the name of the University nor the names of its contributors
  47  *    may be used to endorse or promote products derived from this software
  48  *    without specific prior written permission.
  49  *
  50  * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
  51  * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
  52  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
  53  * ARE DISCLAIMED.  IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
  54  * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
  55  * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
  56  * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
  57  * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
  58  * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
  59  * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
  60  * SUCH DAMAGE.
  61  *
  62  *      @(#)if_ether.h  8.3 (Berkeley) 5/2/95
  63  * $FreeBSD: src/sys/netinet/if_ether.h,v 1.24 1999/12/29 04:40:58 peter Exp $
  64  */
  65
  66 #ifndef _NETINET_IF_ETHER_H_
  67 #define _NETINET_IF_ETHER_H_
  68 #include <sys/appleapiopts.h>
  69
  70 #include <net/ethernet.h>
  71
  72 #include <netinet/in.h>
  73 #include <net/if_arp.h>
  74 #define ea_byte ether_addr_octet
  75
  76 /*
  77  * Macro to map an IP multicast address to an Ethernet multicast address.
  78  * The high-order 25 bits of the Ethernet address are statically assigned,
  79  * and the low-order 23 bits are taken from the low end of the IP address.
  80  */
  81 #define ETHER_MAP_IP_MULTICAST(ipaddr, enaddr) \
  82         /* struct in_addr *ipaddr; */ \
  83         /* u_char enaddr[ETHER_ADDR_LEN];          */ \
  84 { \
  85         (enaddr)[0] = 0x01; \
  86         (enaddr)[1] = 0x00; \
  87         (enaddr)[2] = 0x5e; \
  88         (enaddr)[3] = ((const u_char *)ipaddr)[1] & 0x7f; \
  89         (enaddr)[4] = ((const u_char *)ipaddr)[2]; \
  90         (enaddr)[5] = ((const u_char *)ipaddr)[3]; \
  91 }
  92 /*
  93  * Macro to map an IP6 multicast address to an Ethernet multicast address.
  94  * The high-order 16 bits of the Ethernet address are statically assigned,
  95  * and the low-order 32 bits are taken from the low end of the IP6 address.
  96  */
  97 #define ETHER_MAP_IPV6_MULTICAST(ip6addr, enaddr)                       \
  98 /* struct       in6_addr *ip6addr; */                                   \
  99 /* u_char       enaddr[ETHER_ADDR_LEN]; */                              \
 100 {                                                                       \
 101         (enaddr)[0] = 0x33;                                             \
 102         (enaddr)[1] = 0x33;                                             \
 103         (enaddr)[2] = ((const u_char *)ip6addr)[12];                            \
 104         (enaddr)[3] = ((const u_char *)ip6addr)[13];                            \
 105         (enaddr)[4] = ((const u_char *)ip6addr)[14];                            \
 106         (enaddr)[5] = ((const u_char *)ip6addr)[15];                            \
 107 }
 108
 109 /*
 110  * Ethernet Address Resolution Protocol.
 111  *
 112  * See RFC 826 for protocol description.  Structure below is adapted
 113  * to resolving internet addresses.  Field names used correspond to
 114  * RFC 826.
 115  */
 116 struct  ether_arp {
 117         struct  arphdr ea_hdr;  /* fixed-size header */
 118         u_char  arp_sha[ETHER_ADDR_LEN];        /* sender hardware address */
 119         u_char  arp_spa[4];     /* sender protocol address */
 120         u_char  arp_tha[ETHER_ADDR_LEN];        /* target hardware address */
 121         u_char  arp_tpa[4];     /* target protocol address */
 122 };
 123 #define arp_hrd ea_hdr.ar_hrd
 124 #define arp_pro ea_hdr.ar_pro
 125 #define arp_hln ea_hdr.ar_hln
 126 #define arp_pln ea_hdr.ar_pln
 127 #define arp_op  ea_hdr.ar_op
 128
 129 struct sockaddr_inarp {
 130         u_char  sin_len;
 131         u_char  sin_family;
 132         u_short sin_port;
 133         struct  in_addr sin_addr;
 134         struct  in_addr sin_srcaddr;
 135         u_short sin_tos;
 136         u_short sin_other;
 137 #define SIN_PROXY 1
 138 };
 139 /*
 140  * IP and ethernet specific routing flags
 141  */
 142 #define RTF_USETRAILERS RTF_PROTO1      /* use trailers */
 143 #define RTF_ANNOUNCE    RTF_PROTO2      /* announce new arp entry */
 144
 145 #ifdef KERNEL_PRIVATE
 146 extern u_char   ether_ipmulticast_min[ETHER_ADDR_LEN];
 147 extern u_char   ether_ipmulticast_max[ETHER_ADDR_LEN];
 148 extern struct   ifqueue arpintrq;
 149
 150 int     arpresolve(struct ifnet *, struct rtentry *, struct mbuf *,
 151                         struct sockaddr *, u_char *, struct rtentry *);
 152 void    arp_ifinit(struct ifnet *, struct ifaddr *);
 153 #endif KERNEL_PRIVATE
 154
 155 #endif _NETINET_IF_ETHER_H_