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] = ((const u_char *)ipaddr)[1] & 0x7f; \ 52 (enaddr)[4] = ((const u_char *)ipaddr)[2]; \ 53 (enaddr)[5] = ((const 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] = ((const u_char *)ip6addr)[12]; \ 67 (enaddr)[3] = ((const u_char *)ip6addr)[13]; \ 68 (enaddr)[4] = ((const u_char *)ip6addr)[14]; \ 69 (enaddr)[5] = ((const 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 #ifndef BURN_BRIDGES /* Can be used by third party software. */ 93 struct sockaddr_inarp { 94 u_char sin_len; 95 u_char sin_family; 96 u_short sin_port; 97 struct in_addr sin_addr; 98 struct in_addr sin_srcaddr; 99 u_short sin_tos; 100 u_short sin_other; 101 #define SIN_PROXY 1 102 }; 103 #endif /* !BURN_BRIDGES */ 104 105 /* 106 * IP and ethernet specific routing flags 107 */ 108 #define RTF_USETRAILERS RTF_PROTO1 /* use trailers */ 109 #define RTF_ANNOUNCE RTF_PROTO2 /* announce new arp entry */ 110 111 #ifdef _KERNEL 112 extern u_char ether_ipmulticast_min[ETHER_ADDR_LEN]; 113 extern u_char ether_ipmulticast_max[ETHER_ADDR_LEN]; 114 115 struct ifaddr; 116 struct llentry; 117 118 int arpresolve_addr(struct ifnet *ifp, int flags, 119 const struct sockaddr *dst, char *desten, uint32_t *pflags, 120 struct llentry **plle); 121 int arpresolve(struct ifnet *ifp, int is_gw, struct mbuf *m, 122 const struct sockaddr *dst, u_char *desten, uint32_t *pflags, 123 struct llentry **plle); 124 void arprequest(struct ifnet *, const struct in_addr *, 125 const struct in_addr *, u_char *); 126 void arp_ifinit(struct ifnet *, struct ifaddr *); 127 void arp_announce_ifaddr(struct ifnet *, struct in_addr addr, u_char *); 128 #endif 129 130 #endif 131