bsd/netinet/if_ether.h

   1 /*
   2  * Copyright (c) 2000-2011 Apple Inc. All rights reserved.
   3  *
   4  * @APPLE_OSREFERENCE_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. The rights granted to you under the License
  10  * may not be used to create, or enable the creation or redistribution of,
  11  * unlawful or unlicensed copies of an Apple operating system, or to
  12  * circumvent, violate, or enable the circumvention or violation of, any
  13  * terms of an Apple operating system software license agreement.
  14  *
  15  * Please obtain a copy of the License at
  16  * http://www.opensource.apple.com/apsl/ and read it before using this file.
  17  *
  18  * The Original Code and all software distributed under the License are
  19  * distributed on an 'AS IS' basis, WITHOUT WARRANTY OF ANY KIND, EITHER
  20  * EXPRESS OR IMPLIED, AND APPLE HEREBY DISCLAIMS ALL SUCH WARRANTIES,
  21  * INCLUDING WITHOUT LIMITATION, ANY WARRANTIES OF MERCHANTABILITY,
  22  * FITNESS FOR A PARTICULAR PURPOSE, QUIET ENJOYMENT OR NON-INFRINGEMENT.
  23  * Please see the License for the specific language governing rights and
  24  * limitations under the License.
  25  *
  26  * @APPLE_OSREFERENCE_LICENSE_HEADER_END@
  27  */
  28 /*
  29  * Copyright (c) 1982, 1986, 1993
  30  *      The Regents of the University of California.  All rights reserved.
  31  *
  32  * Redistribution and use in source and binary forms, with or without
  33  * modification, are permitted provided that the following conditions
  34  * are met:
  35  * 1. Redistributions of source code must retain the above copyright
  36  *    notice, this list of conditions and the following disclaimer.
  37  * 2. Redistributions in binary form must reproduce the above copyright
  38  *    notice, this list of conditions and the following disclaimer in the
  39  *    documentation and/or other materials provided with the distribution.
  40  * 3. All advertising materials mentioning features or use of this software
  41  *    must display the following acknowledgement:
  42  *      This product includes software developed by the University of
  43  *      California, Berkeley and its contributors.
  44  * 4. Neither the name of the University nor the names of its contributors
  45  *    may be used to endorse or promote products derived from this software
  46  *    without specific prior written permission.
  47  *
  48  * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
  49  * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
  50  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
  51  * ARE DISCLAIMED.  IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
  52  * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
  53  * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
  54  * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
  55  * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
  56  * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
  57  * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
  58  * SUCH DAMAGE.
  59  *
  60  *      @(#)if_ether.h  8.3 (Berkeley) 5/2/95
  61  * $FreeBSD: src/sys/netinet/if_ether.h,v 1.24 1999/12/29 04:40:58 peter Exp $
  62  */
  63
  64 #ifndef _NETINET_IF_ETHER_H_
  65 #define _NETINET_IF_ETHER_H_
  66 #include <sys/appleapiopts.h>
  67
  68 #include <net/ethernet.h>
  69
  70 #include <netinet/in.h>
  71 #include <net/if_arp.h>
  72 #define ea_byte ether_addr_octet
  73
  74 /*
  75  * Macro to map an IP multicast address to an Ethernet multicast address.
  76  * The high-order 25 bits of the Ethernet address are statically assigned,
  77  * and the low-order 23 bits are taken from the low end of the IP address.
  78  */
  79 #define ETHER_MAP_IP_MULTICAST(ipaddr, enaddr) \
  80         /* struct in_addr *ipaddr; */ \
  81         /* u_char enaddr[ETHER_ADDR_LEN];          */ \
  82 { \
  83         (enaddr)[0] = 0x01; \
  84         (enaddr)[1] = 0x00; \
  85         (enaddr)[2] = 0x5e; \
  86         (enaddr)[3] = ((const u_char *)ipaddr)[1] & 0x7f; \
  87         (enaddr)[4] = ((const u_char *)ipaddr)[2]; \
  88         (enaddr)[5] = ((const u_char *)ipaddr)[3]; \
  89 }
  90 /*
  91  * Macro to map an IP6 multicast address to an Ethernet multicast address.
  92  * The high-order 16 bits of the Ethernet address are statically assigned,
  93  * and the low-order 32 bits are taken from the low end of the IP6 address.
  94  */
  95 #define ETHER_MAP_IPV6_MULTICAST(ip6addr, enaddr)                       \
  96 /* struct       in6_addr *ip6addr; */                                   \
  97 /* u_char       enaddr[ETHER_ADDR_LEN]; */                              \
  98 {                                                                       \
  99         (enaddr)[0] = 0x33;                                             \
 100         (enaddr)[1] = 0x33;                                             \
 101         (enaddr)[2] = ((const u_char *)ip6addr)[12];                            \
 102         (enaddr)[3] = ((const u_char *)ip6addr)[13];                            \
 103         (enaddr)[4] = ((const u_char *)ip6addr)[14];                            \
 104         (enaddr)[5] = ((const u_char *)ip6addr)[15];                            \
 105 }
 106
 107 /*
 108  * Ethernet Address Resolution Protocol.
 109  *
 110  * See RFC 826 for protocol description.  Structure below is adapted
 111  * to resolving internet addresses.  Field names used correspond to
 112  * RFC 826.
 113  */
 114 struct  ether_arp {
 115         struct  arphdr ea_hdr;  /* fixed-size header */
 116         u_char  arp_sha[ETHER_ADDR_LEN];        /* sender hardware address */
 117         u_char  arp_spa[4];     /* sender protocol address */
 118         u_char  arp_tha[ETHER_ADDR_LEN];        /* target hardware address */
 119         u_char  arp_tpa[4];     /* target protocol address */
 120 };
 121 #define arp_hrd ea_hdr.ar_hrd
 122 #define arp_pro ea_hdr.ar_pro
 123 #define arp_hln ea_hdr.ar_hln
 124 #define arp_pln ea_hdr.ar_pln
 125 #define arp_op  ea_hdr.ar_op
 126
 127 struct sockaddr_inarp {
 128         u_char  sin_len;
 129         u_char  sin_family;
 130         u_short sin_port;
 131         struct  in_addr sin_addr;
 132         struct  in_addr sin_srcaddr;
 133         u_short sin_tos;
 134         u_short sin_other;
 135 #define SIN_PROXY       0x1
 136 #define SIN_ROUTER      0x2
 137 };
 138 /*
 139  * IP and ethernet specific routing flags
 140  */
 141 #define RTF_USETRAILERS RTF_PROTO1      /* use trailers */
 142 #define RTF_ANNOUNCE    RTF_PROTO2      /* announce new arp entry */
 143
 144 #ifdef BSD_KERNEL_PRIVATE
 145 extern u_char   ether_ipmulticast_min[ETHER_ADDR_LEN];
 146 extern u_char   ether_ipmulticast_max[ETHER_ADDR_LEN];
 147 extern struct   ifqueue arpintrq;
 148
 149 int     arpresolve(struct ifnet *, struct rtentry *, struct mbuf *,
 150                         struct sockaddr *, u_char *, struct rtentry *);
 151 void    arp_ifinit(struct ifnet *, struct ifaddr *);
 152 #endif /* BSD_KERNEL_PRIVATE */
 153
 154 #endif /* _NETINET_IF_ETHER_H_ */