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 1.27 2002/03/24 10:19:10 bde Exp $ 35 */ 36 37 #ifndef _NETINET_IF_ETHER_H_ 38 #define _NETINET_IF_ETHER_H_ 39 40 #include <net/ethernet.h> 41 #include <net/if_arp.h> 42 43 /* 44 * Macro to map an IP multicast address to an Ethernet multicast address. 45 * The high-order 25 bits of the Ethernet address are statically assigned, 46 * and the low-order 23 bits are taken from the low end of the IP address. 47 */ 48 #define ETHER_MAP_IP_MULTICAST(ipaddr, enaddr) \ 49 /* struct in_addr *ipaddr; */ \ 50 /* u_char enaddr[ETHER_ADDR_LEN]; */ \ 51 { \ 52 (enaddr)[0] = 0x01; \ 53 (enaddr)[1] = 0x00; \ 54 (enaddr)[2] = 0x5e; \ 55 (enaddr)[3] = ((u_char *)ipaddr)[1] & 0x7f; \ 56 (enaddr)[4] = ((u_char *)ipaddr)[2]; \ 57 (enaddr)[5] = ((u_char *)ipaddr)[3]; \ 58 } 59 /* 60 * Macro to map an IP6 multicast address to an Ethernet multicast address. 61 * The high-order 16 bits of the Ethernet address are statically assigned, 62 * and the low-order 32 bits are taken from the low end of the IP6 address. 63 */ 64 #define ETHER_MAP_IPV6_MULTICAST(ip6addr, enaddr) \ 65 /* struct in6_addr *ip6addr; */ \ 66 /* u_char enaddr[ETHER_ADDR_LEN]; */ \ 67 { \ 68 (enaddr)[0] = 0x33; \ 69 (enaddr)[1] = 0x33; \ 70 (enaddr)[2] = ((u_char *)ip6addr)[12]; \ 71 (enaddr)[3] = ((u_char *)ip6addr)[13]; \ 72 (enaddr)[4] = ((u_char *)ip6addr)[14]; \ 73 (enaddr)[5] = ((u_char *)ip6addr)[15]; \ 74 } 75 76 /* 77 * Ethernet Address Resolution Protocol. 78 * 79 * See RFC 826 for protocol description. Structure below is adapted 80 * to resolving internet addresses. Field names used correspond to 81 * RFC 826. 82 */ 83 struct ether_arp { 84 struct arphdr ea_hdr; /* fixed-size header */ 85 u_char arp_sha[ETHER_ADDR_LEN]; /* sender hardware address */ 86 u_char arp_spa[4]; /* sender protocol address */ 87 u_char arp_tha[ETHER_ADDR_LEN]; /* target hardware address */ 88 u_char arp_tpa[4]; /* target protocol address */ 89 }; 90 #define arp_hrd ea_hdr.ar_hrd 91 #define arp_pro ea_hdr.ar_pro 92 #define arp_hln ea_hdr.ar_hln 93 #define arp_pln ea_hdr.ar_pln 94 #define arp_op ea_hdr.ar_op 95 96 struct sockaddr_inarp { 97 u_char sin_len; 98 u_char sin_family; 99 u_short sin_port; 100 struct in_addr sin_addr; 101 struct in_addr sin_srcaddr; 102 u_short sin_tos; 103 u_short sin_other; 104 #define SIN_PROXY 1 105 }; 106 /* 107 * IP and ethernet specific routing flags 108 */ 109 #define RTF_USETRAILERS RTF_PROTO1 /* use trailers */ 110 #define RTF_ANNOUNCE RTF_PROTO2 /* announce new arp entry */ 111 112 #ifdef _KERNEL 113 extern u_char ether_ipmulticast_min[ETHER_ADDR_LEN]; 114 extern u_char ether_ipmulticast_max[ETHER_ADDR_LEN]; 115 extern struct ifqueue arpintrq; 116 117 int arpresolve(struct ifnet *, struct rtentry *, struct mbuf *, 118 struct sockaddr *, u_char *, struct rtentry *); 119 void arp_ifinit(struct ifnet *, struct ifaddr *); 120 #endif 121 122 #endif 123