1 /*- 2 * SPDX-License-Identifier: BSD-3-Clause 3 * 4 * Copyright (c) 1982, 1986, 1993 5 * The Regents of the University of California. All rights reserved. 6 * 7 * Redistribution and use in source and binary forms, with or without 8 * modification, are permitted provided that the following conditions 9 * are met: 10 * 1. Redistributions of source code must retain the above copyright 11 * notice, this list of conditions and the following disclaimer. 12 * 2. Redistributions in binary form must reproduce the above copyright 13 * notice, this list of conditions and the following disclaimer in the 14 * documentation and/or other materials provided with the distribution. 15 * 3. Neither the name of the University nor the names of its contributors 16 * may be used to endorse or promote products derived from this software 17 * without specific prior written permission. 18 * 19 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND 20 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 21 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 22 * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE 23 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 24 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 25 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 26 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 27 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 28 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 29 * SUCH DAMAGE. 30 * 31 * @(#)if_ether.h 8.3 (Berkeley) 5/2/95 32 */ 33 34 #ifndef _NETINET_IF_ETHER_H_ 35 #define _NETINET_IF_ETHER_H_ 36 37 #include <net/ethernet.h> 38 #include <net/if_arp.h> 39 40 /* 41 * Macro to map an IP multicast address to an Ethernet multicast address. 42 * The high-order 25 bits of the Ethernet address are statically assigned, 43 * and the low-order 23 bits are taken from the low end of the IP address. 44 */ 45 #define ETHER_MAP_IP_MULTICAST(ipaddr, enaddr) \ 46 /* struct in_addr *ipaddr; */ \ 47 /* u_char enaddr[ETHER_ADDR_LEN]; */ \ 48 { \ 49 (enaddr)[0] = 0x01; \ 50 (enaddr)[1] = 0x00; \ 51 (enaddr)[2] = 0x5e; \ 52 (enaddr)[3] = ((const u_char *)ipaddr)[1] & 0x7f; \ 53 (enaddr)[4] = ((const u_char *)ipaddr)[2]; \ 54 (enaddr)[5] = ((const u_char *)ipaddr)[3]; \ 55 } 56 /* 57 * Macro to map an IP6 multicast address to an Ethernet multicast address. 58 * The high-order 16 bits of the Ethernet address are statically assigned, 59 * and the low-order 32 bits are taken from the low end of the IP6 address. 60 */ 61 #define ETHER_MAP_IPV6_MULTICAST(ip6addr, enaddr) \ 62 /* struct in6_addr *ip6addr; */ \ 63 /* u_char enaddr[ETHER_ADDR_LEN]; */ \ 64 { \ 65 (enaddr)[0] = 0x33; \ 66 (enaddr)[1] = 0x33; \ 67 (enaddr)[2] = ((const u_char *)ip6addr)[12]; \ 68 (enaddr)[3] = ((const u_char *)ip6addr)[13]; \ 69 (enaddr)[4] = ((const u_char *)ip6addr)[14]; \ 70 (enaddr)[5] = ((const u_char *)ip6addr)[15]; \ 71 } 72 73 /* 74 * Ethernet Address Resolution Protocol. 75 * 76 * See RFC 826 for protocol description. Structure below is adapted 77 * to resolving internet addresses. Field names used correspond to 78 * RFC 826. 79 */ 80 struct ether_arp { 81 struct arphdr ea_hdr; /* fixed-size header */ 82 u_char arp_sha[ETHER_ADDR_LEN]; /* sender hardware address */ 83 u_char arp_spa[4]; /* sender protocol address */ 84 u_char arp_tha[ETHER_ADDR_LEN]; /* target hardware address */ 85 u_char arp_tpa[4]; /* target protocol address */ 86 }; 87 #define arp_hrd ea_hdr.ar_hrd 88 #define arp_pro ea_hdr.ar_pro 89 #define arp_hln ea_hdr.ar_hln 90 #define arp_pln ea_hdr.ar_pln 91 #define arp_op ea_hdr.ar_op 92 93 #ifndef BURN_BRIDGES /* Can be used by third party software. */ 94 struct sockaddr_inarp { 95 u_char sin_len; 96 u_char sin_family; 97 u_short sin_port; 98 struct in_addr sin_addr; 99 struct in_addr sin_srcaddr; 100 u_short sin_tos; 101 u_short sin_other; 102 #define SIN_PROXY 1 103 }; 104 #endif /* !BURN_BRIDGES */ 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]; 115 116 struct ifaddr; 117 struct llentry; 118 119 int arpresolve(struct ifnet *ifp, int is_gw, struct mbuf *m, 120 const struct sockaddr *dst, u_char *desten, uint32_t *pflags, 121 struct llentry **plle); 122 void arprequest(struct ifnet *, const struct in_addr *, 123 const struct in_addr *, u_char *); 124 void arp_ifinit(struct ifnet *, struct ifaddr *); 125 void arp_announce_ifaddr(struct ifnet *, struct in_addr addr, u_char *); 126 #endif 127 128 #endif 129