1/* 2 * Copyright (c) 2000 Apple Computer, Inc. All rights reserved. 3 * 4 * @APPLE_OSREFERENCE_LICENSE_HEADER_START@ 5 * 6 * This file contains Original Code and/or Modifications of Original Code 7 * as defined in and that are subject to the Apple Public Source License 8 * Version 2.0 (the 'License'). You may not use this file except in 9 * compliance with the License. The rights granted to you under the License 10 * may not be used to create, or enable the creation or redistribution of, 11 * unlawful or unlicensed copies of an Apple operating system, or to 12 * circumvent, violate, or enable the circumvention or violation of, any 13 * terms of an Apple operating system software license agreement. 14 * 15 * Please obtain a copy of the License at 16 * http://www.opensource.apple.com/apsl/ and read it before using this file. 17 * 18 * The Original Code and all software distributed under the License are 19 * distributed on an 'AS IS' basis, WITHOUT WARRANTY OF ANY KIND, EITHER 20 * EXPRESS OR IMPLIED, AND APPLE HEREBY DISCLAIMS ALL SUCH WARRANTIES, 21 * INCLUDING WITHOUT LIMITATION, ANY WARRANTIES OF MERCHANTABILITY, 22 * FITNESS FOR A PARTICULAR PURPOSE, QUIET ENJOYMENT OR NON-INFRINGEMENT. 23 * Please see the License for the specific language governing rights and 24 * limitations under the License. 25 * 26 * @APPLE_OSREFERENCE_LICENSE_HEADER_END@ 27 */ 28/* 29 * Copyright (c) 1982, 1989, 1993 30 * The Regents of the University of California. All rights reserved. 31 * 32 * Redistribution and use in source and binary forms, with or without 33 * modification, are permitted provided that the following conditions 34 * are met: 35 * 1. Redistributions of source code must retain the above copyright 36 * notice, this list of conditions and the following disclaimer. 37 * 2. Redistributions in binary form must reproduce the above copyright 38 * notice, this list of conditions and the following disclaimer in the 39 * documentation and/or other materials provided with the distribution. 40 * 3. All advertising materials mentioning features or use of this software 41 * must display the following acknowledgement: 42 * This product includes software developed by the University of 43 * California, Berkeley and its contributors. 44 * 4. Neither the name of the University nor the names of its contributors 45 * may be used to endorse or promote products derived from this software 46 * without specific prior written permission. 47 * 48 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND 49 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 50 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 51 * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE 52 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 53 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 54 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 55 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 56 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 57 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 58 * SUCH DAMAGE. 59 * 60 * @(#)if_ethersubr.c 8.1 (Berkeley) 6/10/93 61 * $FreeBSD: src/sys/net/if_ethersubr.c,v 1.70.2.17 2001/08/01 00:47:49 fenner Exp $ 62 */ 63 64#include <sys/param.h> 65#include <sys/systm.h> 66#include <sys/kernel.h> 67#include <sys/malloc.h> 68#include <sys/mbuf.h> 69#include <sys/socket.h> 70#include <sys/sockio.h> 71#include <sys/sysctl.h> 72 73#include <net/if.h> 74#include <net/route.h> 75#include <net/if_llc.h> 76#include <net/if_dl.h> 77#include <net/if_types.h> 78 79#if INET || INET6 80#include <netinet/in.h> 81#include <netinet/in_var.h> 82#include <netinet/if_ether.h> 83#include <netinet/in_systm.h> 84#include <netinet/ip.h> 85#endif 86 87#if IPX 88#include <netipx/ipx.h> 89#include <netipx/ipx_if.h> 90#endif 91 92#include <sys/socketvar.h> 93 94#if LLC && CCITT 95extern struct ifqueue pkintrq; 96#endif 97 98#if BRIDGE 99#include <net/bridge.h> 100#endif 101 102/* #include "vlan.h" */ 103#if NVLAN > 0 104#include <net/if_vlan_var.h> 105#endif /* NVLAN > 0 */ 106 107extern u_char etherbroadcastaddr[]; 108#define senderr(e) do { error = (e); goto bad;} while (0) 109 110/* 111 * Perform common duties while attaching to interface list 112 */ 113 114int 115ether_resolvemulti( 116 struct ifnet *ifp, 117 struct sockaddr **llsa, 118 struct sockaddr *sa) 119{ 120 struct sockaddr_dl *sdl; 121 struct sockaddr_in *sin; 122 u_char *e_addr; 123#if INET6 124 struct sockaddr_in6 *sin6; 125#endif 126 127 128 switch(sa->sa_family) { 129 case AF_UNSPEC: 130 /* AppleTalk uses AF_UNSPEC for multicast registration. 131 * No mapping needed. Just check that it's a valid MC address. 132 */ 133 e_addr = &sa->sa_data[0]; 134 if ((e_addr[0] & 1) != 1) 135 return EADDRNOTAVAIL; 136 *llsa = 0; 137 return 0; 138 139 case AF_LINK: 140 /* 141 * No mapping needed. Just check that it's a valid MC address. 142 */ 143 sdl = (struct sockaddr_dl *)sa; 144 e_addr = LLADDR(sdl); 145 if ((e_addr[0] & 1) != 1) 146 return EADDRNOTAVAIL; 147 *llsa = 0; 148 return 0; 149 150#if INET 151 case AF_INET: 152 sin = (struct sockaddr_in *)sa; 153 if (!IN_MULTICAST(ntohl(sin->sin_addr.s_addr))) 154 return EADDRNOTAVAIL; 155 MALLOC(sdl, struct sockaddr_dl *, sizeof *sdl, M_IFMADDR, 156 M_WAITOK); 157 sdl->sdl_len = sizeof *sdl; 158 sdl->sdl_family = AF_LINK; 159 sdl->sdl_index = ifp->if_index; 160 sdl->sdl_type = IFT_ETHER; 161 sdl->sdl_nlen = 0; 162 sdl->sdl_alen = ETHER_ADDR_LEN; 163 sdl->sdl_slen = 0; 164 e_addr = LLADDR(sdl); 165 ETHER_MAP_IP_MULTICAST(&sin->sin_addr, e_addr); 166 *llsa = (struct sockaddr *)sdl; 167 return 0; 168#endif 169#if INET6 170 case AF_INET6: 171 sin6 = (struct sockaddr_in6 *)sa; 172 if (IN6_IS_ADDR_UNSPECIFIED(&sin6->sin6_addr)) { 173 /* 174 * An IP6 address of 0 means listen to all 175 * of the Ethernet multicast address used for IP6. 176 * (This is used for multicast routers.) 177 */ 178 ifp->if_flags |= IFF_ALLMULTI; 179 *llsa = 0; 180 return 0; 181 } 182 MALLOC(sdl, struct sockaddr_dl *, sizeof *sdl, M_IFMADDR, 183 M_WAITOK); 184 sdl->sdl_len = sizeof *sdl; 185 sdl->sdl_family = AF_LINK; 186 sdl->sdl_index = ifp->if_index; 187 sdl->sdl_type = IFT_ETHER; 188 sdl->sdl_nlen = 0; 189 sdl->sdl_alen = ETHER_ADDR_LEN; 190 sdl->sdl_slen = 0; 191 e_addr = LLADDR(sdl); 192 ETHER_MAP_IPV6_MULTICAST(&sin6->sin6_addr, e_addr); 193#if 0 194 printf("ether_resolvemulti Adding %x:%x:%x:%x:%x:%x\n", 195 e_addr[0], e_addr[1], e_addr[2], e_addr[3], e_addr[4], e_addr[5]); 196#endif 197 *llsa = (struct sockaddr *)sdl; 198 return 0; 199#endif 200 201 default: 202 /* 203 * Well, the text isn't quite right, but it's the name 204 * that counts... 205 */ 206 return EAFNOSUPPORT; 207 } 208} 209 210 211/* 212 * Convert Ethernet address to printable (loggable) representation. 213 */ 214static u_char digits[] = "0123456789abcdef"; 215char * 216ether_sprintf(p, ap) 217 register u_char *p; 218 register u_char *ap; 219{ register char *cp; 220 register i; 221 222 for (cp = p, i = 0; i < 6; i++) { 223 *cp++ = digits[*ap >> 4]; 224 *cp++ = digits[*ap++ & 0xf]; 225 *cp++ = ':'; 226 } 227 *--cp = 0; 228 return (p); 229} 230