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 32#ifndef _NETINET_IF_ETHER_H_ 33#define _NETINET_IF_ETHER_H_ 34 35#include <net/ethernet.h> 36#include <net/if_arp.h> 37 38/* 39 * Macro to map an IP multicast address to an Ethernet multicast address. 40 * The high-order 25 bits of the Ethernet address are statically assigned, 41 * and the low-order 23 bits are taken from the low end of the IP address. 42 */ 43#define ETHER_MAP_IP_MULTICAST(ipaddr, enaddr) \ 44 /* struct in_addr *ipaddr; */ \ 45 /* u_char enaddr[ETHER_ADDR_LEN]; */ \ 46{ \ 47 (enaddr)[0] = 0x01; \ 48 (enaddr)[1] = 0x00; \ 49 (enaddr)[2] = 0x5e; \ 50 (enaddr)[3] = ((const u_char *)ipaddr)[1] & 0x7f; \ 51 (enaddr)[4] = ((const u_char *)ipaddr)[2]; \ 52 (enaddr)[5] = ((const u_char *)ipaddr)[3]; \ 53} 54/* 55 * Macro to map an IP6 multicast address to an Ethernet multicast address. 56 * The high-order 16 bits of the Ethernet address are statically assigned, 57 * and the low-order 32 bits are taken from the low end of the IP6 address. 58 */ 59#define ETHER_MAP_IPV6_MULTICAST(ip6addr, enaddr) \ 60/* struct in6_addr *ip6addr; */ \ 61/* u_char enaddr[ETHER_ADDR_LEN]; */ \ 62{ \ 63 (enaddr)[0] = 0x33; \ 64 (enaddr)[1] = 0x33; \ 65 (enaddr)[2] = ((const u_char *)ip6addr)[12]; \ 66 (enaddr)[3] = ((const u_char *)ip6addr)[13]; \ 67 (enaddr)[4] = ((const u_char *)ip6addr)[14]; \ 68 (enaddr)[5] = ((const u_char *)ip6addr)[15]; \ 69} 70 71/* 72 * Ethernet Address Resolution Protocol. 73 * 74 * See RFC 826 for protocol description. Structure below is adapted 75 * to resolving internet addresses. Field names used correspond to 76 * RFC 826. 77 */ 78struct ether_arp { 79 struct arphdr ea_hdr; /* fixed-size header */ 80 u_char arp_sha[ETHER_ADDR_LEN]; /* sender hardware address */ 81 u_char arp_spa[4]; /* sender protocol address */ 82 u_char arp_tha[ETHER_ADDR_LEN]; /* target hardware address */ 83 u_char arp_tpa[4]; /* target protocol address */ 84}; 85#define arp_hrd ea_hdr.ar_hrd 86#define arp_pro ea_hdr.ar_pro 87#define arp_hln ea_hdr.ar_hln 88#define arp_pln ea_hdr.ar_pln 89#define arp_op ea_hdr.ar_op 90 91#ifndef BURN_BRIDGES /* Can be used by third party software. */ 92struct sockaddr_inarp { 93 u_char sin_len; 94 u_char sin_family; 95 u_short sin_port; 96 struct in_addr sin_addr; 97 struct in_addr sin_srcaddr; 98 u_short sin_tos; 99 u_short sin_other; 100#define SIN_PROXY 1 101}; 102#endif /* !BURN_BRIDGES */ 103 104/* 105 * IP and ethernet specific routing flags 106 */ 107#define RTF_USETRAILERS RTF_PROTO1 /* use trailers */ 108#define RTF_ANNOUNCE RTF_PROTO2 /* announce new arp entry */ 109 110#ifdef _KERNEL 111extern u_char ether_ipmulticast_min[ETHER_ADDR_LEN]; 112extern u_char ether_ipmulticast_max[ETHER_ADDR_LEN]; 113 114struct ifaddr; 115struct llentry; 116 117int arpresolve(struct ifnet *ifp, int is_gw, struct mbuf *m, 118 const struct sockaddr *dst, u_char *desten, uint32_t *pflags, 119 struct llentry **plle); 120void arprequest(struct ifnet *, const struct in_addr *, 121 const struct in_addr *, u_char *); 122void arp_ifinit(struct ifnet *, struct ifaddr *); 123void arp_announce_ifaddr(struct ifnet *, struct in_addr addr, u_char *); 124#endif 125 126#endif 127