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 * $FreeBSD$ 33 */ 34 35#ifndef _NETINET_IF_ETHER_H_ 36#define _NETINET_IF_ETHER_H_ 37 38#include <net/ethernet.h> 39#include <net/if_arp.h> 40 41/* 42 * Macro to map an IP multicast address to an Ethernet multicast address. 43 * The high-order 25 bits of the Ethernet address are statically assigned, 44 * and the low-order 23 bits are taken from the low end of the IP address. 45 */ 46#define ETHER_MAP_IP_MULTICAST(ipaddr, enaddr) \ 47 /* struct in_addr *ipaddr; */ \ 48 /* u_char enaddr[ETHER_ADDR_LEN]; */ \ 49{ \ 50 (enaddr)[0] = 0x01; \ 51 (enaddr)[1] = 0x00; \ 52 (enaddr)[2] = 0x5e; \ 53 (enaddr)[3] = ((const u_char *)ipaddr)[1] & 0x7f; \ 54 (enaddr)[4] = ((const u_char *)ipaddr)[2]; \ 55 (enaddr)[5] = ((const u_char *)ipaddr)[3]; \ 56} 57/* 58 * Macro to map an IP6 multicast address to an Ethernet multicast address. 59 * The high-order 16 bits of the Ethernet address are statically assigned, 60 * and the low-order 32 bits are taken from the low end of the IP6 address. 61 */ 62#define ETHER_MAP_IPV6_MULTICAST(ip6addr, enaddr) \ 63/* struct in6_addr *ip6addr; */ \ 64/* u_char enaddr[ETHER_ADDR_LEN]; */ \ 65{ \ 66 (enaddr)[0] = 0x33; \ 67 (enaddr)[1] = 0x33; \ 68 (enaddr)[2] = ((const u_char *)ip6addr)[12]; \ 69 (enaddr)[3] = ((const u_char *)ip6addr)[13]; \ 70 (enaddr)[4] = ((const u_char *)ip6addr)[14]; \ 71 (enaddr)[5] = ((const u_char *)ip6addr)[15]; \ 72} 73 74/* 75 * Ethernet Address Resolution Protocol. 76 * 77 * See RFC 826 for protocol description. Structure below is adapted 78 * to resolving internet addresses. Field names used correspond to 79 * RFC 826. 80 */ 81struct ether_arp { 82 struct arphdr ea_hdr; /* fixed-size header */ 83 u_char arp_sha[ETHER_ADDR_LEN]; /* sender hardware address */ 84 u_char arp_spa[4]; /* sender protocol address */ 85 u_char arp_tha[ETHER_ADDR_LEN]; /* target hardware address */ 86 u_char arp_tpa[4]; /* target protocol address */ 87}; 88#define arp_hrd ea_hdr.ar_hrd 89#define arp_pro ea_hdr.ar_pro 90#define arp_hln ea_hdr.ar_hln 91#define arp_pln ea_hdr.ar_pln 92#define arp_op ea_hdr.ar_op 93 94#ifndef BURN_BRIDGES /* Can be used by third party software. */ 95struct sockaddr_inarp { 96 u_char sin_len; 97 u_char sin_family; 98 u_short sin_port; 99 struct in_addr sin_addr; 100 struct in_addr sin_srcaddr; 101 u_short sin_tos; 102 u_short sin_other; 103#define SIN_PROXY 1 104}; 105#endif /* !BURN_BRIDGES */ 106 107/* 108 * IP and ethernet specific routing flags 109 */ 110#define RTF_USETRAILERS RTF_PROTO1 /* use trailers */ 111#define RTF_ANNOUNCE RTF_PROTO2 /* announce new arp entry */ 112 113#ifdef _KERNEL 114extern u_char ether_ipmulticast_min[ETHER_ADDR_LEN]; 115extern u_char ether_ipmulticast_max[ETHER_ADDR_LEN]; 116 117struct ifaddr; 118struct llentry; 119 120int arpresolve(struct ifnet *ifp, int is_gw, struct mbuf *m, 121 const struct sockaddr *dst, u_char *desten, uint32_t *pflags, 122 struct llentry **plle); 123void arprequest(struct ifnet *, const struct in_addr *, 124 const struct in_addr *, u_char *); 125void arp_ifinit(struct ifnet *, struct ifaddr *); 126void arp_announce_ifaddr(struct ifnet *, struct in_addr addr, u_char *); 127#endif 128 129#endif 130