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. 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: src/sys/netinet/if_ether.h,v 1.24.2.1 2002/02/13 21:38:56 fjoe Exp $ 31 * $DragonFly: src/sys/netinet/if_ether.h,v 1.7 2007/08/16 20:03:57 dillon Exp $ 32 */ 33 34 #ifndef _NETINET_IF_ETHER_H_ 35 #define _NETINET_IF_ETHER_H_ 36 37 #ifndef _NET_ETHERNET_H_ 38 #include <net/ethernet.h> 39 #endif 40 #ifndef _NET_IF_ARP_H_ 41 #include <net/if_arp.h> 42 #endif 43 #ifndef _NETINET_IN_H_ 44 #include <netinet/in.h> 45 #endif 46 47 /* 48 * Macro to map an IP multicast address to an Ethernet multicast address. 49 * The high-order 25 bits of the Ethernet address are statically assigned, 50 * and the low-order 23 bits are taken from the low end of the IP address. 51 */ 52 #define ETHER_MAP_IP_MULTICAST(ipaddr, enaddr) \ 53 /* struct in_addr *ipaddr; */ \ 54 /* u_char enaddr[ETHER_ADDR_LEN]; */ \ 55 { \ 56 (enaddr)[0] = 0x01; \ 57 (enaddr)[1] = 0x00; \ 58 (enaddr)[2] = 0x5e; \ 59 (enaddr)[3] = ((u_char *)ipaddr)[1] & 0x7f; \ 60 (enaddr)[4] = ((u_char *)ipaddr)[2]; \ 61 (enaddr)[5] = ((u_char *)ipaddr)[3]; \ 62 } 63 /* 64 * Macro to map an IP6 multicast address to an Ethernet multicast address. 65 * The high-order 16 bits of the Ethernet address are statically assigned, 66 * and the low-order 32 bits are taken from the low end of the IP6 address. 67 */ 68 #define ETHER_MAP_IPV6_MULTICAST(ip6addr, enaddr) \ 69 /* struct in6_addr *ip6addr; */ \ 70 /* u_char enaddr[ETHER_ADDR_LEN]; */ \ 71 { \ 72 (enaddr)[0] = 0x33; \ 73 (enaddr)[1] = 0x33; \ 74 (enaddr)[2] = ((u_char *)ip6addr)[12]; \ 75 (enaddr)[3] = ((u_char *)ip6addr)[13]; \ 76 (enaddr)[4] = ((u_char *)ip6addr)[14]; \ 77 (enaddr)[5] = ((u_char *)ip6addr)[15]; \ 78 } 79 80 /* 81 * Ethernet Address Resolution Protocol. 82 * 83 * See RFC 826 for protocol description. Structure below is adapted 84 * to resolving internet addresses. Field names used correspond to 85 * RFC 826. 86 */ 87 struct ether_arp { 88 struct arphdr ea_hdr; /* fixed-size header */ 89 u_char arp_sha[ETHER_ADDR_LEN]; /* sender hardware address */ 90 u_char arp_spa[4]; /* sender protocol address */ 91 u_char arp_tha[ETHER_ADDR_LEN]; /* target hardware address */ 92 u_char arp_tpa[4]; /* target protocol address */ 93 }; 94 #define arp_hrd ea_hdr.ar_hrd 95 #define arp_pro ea_hdr.ar_pro 96 #define arp_hln ea_hdr.ar_hln 97 #define arp_pln ea_hdr.ar_pln 98 #define arp_op ea_hdr.ar_op 99 100 struct sockaddr_inarp { 101 u_char sin_len; 102 u_char sin_family; 103 u_short sin_port; 104 struct in_addr sin_addr; 105 struct in_addr sin_srcaddr; 106 u_short sin_tos; 107 u_short sin_other; 108 #define SIN_PROXY 1 109 }; 110 /* 111 * IP and ethernet specific routing flags 112 */ 113 #define RTF_USETRAILERS RTF_PROTO1 /* use trailers */ 114 #define RTF_ANNOUNCE RTF_PROTO2 /* announce new arp entry */ 115 116 #ifdef _KERNEL 117 extern u_char ether_ipmulticast_min[ETHER_ADDR_LEN]; 118 extern u_char ether_ipmulticast_max[ETHER_ADDR_LEN]; 119 120 int arpresolve (struct ifnet *, struct rtentry *, struct mbuf *, 121 struct sockaddr *, u_char *); 122 void arp_ifinit (struct ifnet *, struct ifaddr *); 123 void arp_gratuitous (struct ifnet *, struct ifaddr *); 124 #endif 125 126 #endif 127