| 1 | /* |
| 2 | * Copyright (c) 2000 Apple Computer, Inc. All rights reserved. |
| 3 | * |
| 4 | * @APPLE_LICENSE_HEADER_START@ |
| 5 | * |
| 6 | * The contents of this file constitute Original Code as defined in and |
| 7 | * are subject to the Apple Public Source License Version 1.1 (the |
| 8 | * "License"). You may not use this file except in compliance with the |
| 9 | * License. Please obtain a copy of the License at |
| 10 | * http://www.apple.com/publicsource and read it before using this file. |
| 11 | * |
| 12 | * This Original Code and all software distributed under the License are |
| 13 | * distributed on an "AS IS" basis, WITHOUT WARRANTY OF ANY KIND, EITHER |
| 14 | * EXPRESS OR IMPLIED, AND APPLE HEREBY DISCLAIMS ALL SUCH WARRANTIES, |
| 15 | * INCLUDING WITHOUT LIMITATION, ANY WARRANTIES OF MERCHANTABILITY, |
| 16 | * FITNESS FOR A PARTICULAR PURPOSE OR NON-INFRINGEMENT. Please see the |
| 17 | * License for the specific language governing rights and limitations |
| 18 | * under the License. |
| 19 | * |
| 20 | * @APPLE_LICENSE_HEADER_END@ |
| 21 | */ |
| 22 | /* |
| 23 | * Copyright (c) 1982, 1989, 1993 |
| 24 | * The Regents of the University of California. All rights reserved. |
| 25 | * |
| 26 | * Redistribution and use in source and binary forms, with or without |
| 27 | * modification, are permitted provided that the following conditions |
| 28 | * are met: |
| 29 | * 1. Redistributions of source code must retain the above copyright |
| 30 | * notice, this list of conditions and the following disclaimer. |
| 31 | * 2. Redistributions in binary form must reproduce the above copyright |
| 32 | * notice, this list of conditions and the following disclaimer in the |
| 33 | * documentation and/or other materials provided with the distribution. |
| 34 | * 3. All advertising materials mentioning features or use of this software |
| 35 | * must display the following acknowledgement: |
| 36 | * This product includes software developed by the University of |
| 37 | * California, Berkeley and its contributors. |
| 38 | * 4. Neither the name of the University nor the names of its contributors |
| 39 | * may be used to endorse or promote products derived from this software |
| 40 | * without specific prior written permission. |
| 41 | * |
| 42 | * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND |
| 43 | * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE |
| 44 | * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE |
| 45 | * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE |
| 46 | * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL |
| 47 | * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS |
| 48 | * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) |
| 49 | * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT |
| 50 | * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY |
| 51 | * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF |
| 52 | * SUCH DAMAGE. |
| 53 | * |
| 54 | * @(#)if_ethersubr.c 8.1 (Berkeley) 6/10/93 |
| 55 | * $FreeBSD: src/sys/net/if_ethersubr.c,v 1.70.2.17 2001/08/01 00:47:49 fenner Exp $ |
| 56 | */ |
| 57 | |
| 58 | #include <sys/param.h> |
| 59 | #include <sys/systm.h> |
| 60 | #include <sys/kernel.h> |
| 61 | #include <sys/malloc.h> |
| 62 | #include <sys/mbuf.h> |
| 63 | #include <sys/socket.h> |
| 64 | #include <sys/sockio.h> |
| 65 | #include <sys/sysctl.h> |
| 66 | |
| 67 | #include <net/if.h> |
| 68 | #include <net/netisr.h> |
| 69 | #include <net/route.h> |
| 70 | #include <net/if_llc.h> |
| 71 | #include <net/if_dl.h> |
| 72 | #include <net/if_types.h> |
| 73 | |
| 74 | #if INET || INET6 |
| 75 | #include <netinet/in.h> |
| 76 | #include <netinet/in_var.h> |
| 77 | #include <netinet/if_ether.h> |
| 78 | #include <netinet/in_systm.h> |
| 79 | #include <netinet/ip.h> |
| 80 | #endif |
| 81 | |
| 82 | #if IPX |
| 83 | #include <netipx/ipx.h> |
| 84 | #include <netipx/ipx_if.h> |
| 85 | #endif |
| 86 | |
| 87 | #include <sys/socketvar.h> |
| 88 | |
| 89 | #if LLC && CCITT |
| 90 | extern struct ifqueue pkintrq; |
| 91 | #endif |
| 92 | |
| 93 | #if BRIDGE |
| 94 | #include <net/bridge.h> |
| 95 | #endif |
| 96 | |
| 97 | /* #include "vlan.h" */ |
| 98 | #if NVLAN > 0 |
| 99 | #include <net/if_vlan_var.h> |
| 100 | #endif /* NVLAN > 0 */ |
| 101 | |
| 102 | static int ether_resolvemulti __P((struct ifnet *, struct sockaddr **, |
| 103 | struct sockaddr *)); |
| 104 | extern u_char etherbroadcastaddr[]; |
| 105 | #define senderr(e) do { error = (e); goto bad;} while (0) |
| 106 | #define IFP2AC(IFP) ((struct arpcom *)IFP) |
| 107 | |
| 108 | /* |
| 109 | * Perform common duties while attaching to interface list |
| 110 | */ |
| 111 | |
| 112 | |
| 113 | /* |
| 114 | IONetworkingFamily should call dlil_if_attach |
| 115 | ether_ifattach becomes obsolete, but remains for |
| 116 | temporary compatibility with third parties extensions |
| 117 | */ |
| 118 | void |
| 119 | ether_ifattach(ifp) |
| 120 | register struct ifnet *ifp; |
| 121 | { |
| 122 | boolean_t funnel_state; |
| 123 | |
| 124 | funnel_state = thread_funnel_set(network_flock, TRUE); |
| 125 | |
| 126 | ifp->if_name = "en"; |
| 127 | ifp->if_family = APPLE_IF_FAM_ETHERNET; |
| 128 | ifp->if_type = IFT_ETHER; |
| 129 | ifp->if_addrlen = 6; |
| 130 | ifp->if_hdrlen = 14; |
| 131 | ifp->if_mtu = ETHERMTU; |
| 132 | ifp->if_resolvemulti = ether_resolvemulti; |
| 133 | if (ifp->if_baudrate == 0) |
| 134 | ifp->if_baudrate = 10000000; |
| 135 | |
| 136 | dlil_if_attach(ifp); |
| 137 | (void) thread_funnel_set(network_flock, funnel_state); |
| 138 | } |
| 139 | |
| 140 | SYSCTL_DECL(_net_link); |
| 141 | SYSCTL_NODE(_net_link, IFT_ETHER, ether, CTLFLAG_RW, 0, "Ethernet"); |
| 142 | |
| 143 | int |
| 144 | ether_resolvemulti(ifp, llsa, sa) |
| 145 | struct ifnet *ifp; |
| 146 | struct sockaddr **llsa; |
| 147 | struct sockaddr *sa; |
| 148 | { |
| 149 | struct sockaddr_dl *sdl; |
| 150 | struct sockaddr_in *sin; |
| 151 | u_char *e_addr; |
| 152 | #if INET6 |
| 153 | struct sockaddr_in6 *sin6; |
| 154 | #endif |
| 155 | |
| 156 | |
| 157 | switch(sa->sa_family) { |
| 158 | case AF_UNSPEC: |
| 159 | /* AppleTalk uses AF_UNSPEC for multicast registration. |
| 160 | * No mapping needed. Just check that it's a valid MC address. |
| 161 | */ |
| 162 | e_addr = &sa->sa_data[0]; |
| 163 | if ((e_addr[0] & 1) != 1) |
| 164 | return EADDRNOTAVAIL; |
| 165 | *llsa = 0; |
| 166 | return 0; |
| 167 | |
| 168 | case AF_LINK: |
| 169 | /* |
| 170 | * No mapping needed. Just check that it's a valid MC address. |
| 171 | */ |
| 172 | sdl = (struct sockaddr_dl *)sa; |
| 173 | e_addr = LLADDR(sdl); |
| 174 | if ((e_addr[0] & 1) != 1) |
| 175 | return EADDRNOTAVAIL; |
| 176 | *llsa = 0; |
| 177 | return 0; |
| 178 | |
| 179 | #if INET |
| 180 | case AF_INET: |
| 181 | sin = (struct sockaddr_in *)sa; |
| 182 | if (!IN_MULTICAST(ntohl(sin->sin_addr.s_addr))) |
| 183 | return EADDRNOTAVAIL; |
| 184 | MALLOC(sdl, struct sockaddr_dl *, sizeof *sdl, M_IFMADDR, |
| 185 | M_WAITOK); |
| 186 | sdl->sdl_len = sizeof *sdl; |
| 187 | sdl->sdl_family = AF_LINK; |
| 188 | sdl->sdl_index = ifp->if_index; |
| 189 | sdl->sdl_type = IFT_ETHER; |
| 190 | sdl->sdl_nlen = 0; |
| 191 | sdl->sdl_alen = ETHER_ADDR_LEN; |
| 192 | sdl->sdl_slen = 0; |
| 193 | e_addr = LLADDR(sdl); |
| 194 | ETHER_MAP_IP_MULTICAST(&sin->sin_addr, e_addr); |
| 195 | *llsa = (struct sockaddr *)sdl; |
| 196 | return 0; |
| 197 | #endif |
| 198 | #if INET6 |
| 199 | case AF_INET6: |
| 200 | sin6 = (struct sockaddr_in6 *)sa; |
| 201 | if (IN6_IS_ADDR_UNSPECIFIED(&sin6->sin6_addr)) { |
| 202 | /* |
| 203 | * An IP6 address of 0 means listen to all |
| 204 | * of the Ethernet multicast address used for IP6. |
| 205 | * (This is used for multicast routers.) |
| 206 | */ |
| 207 | ifp->if_flags |= IFF_ALLMULTI; |
| 208 | *llsa = 0; |
| 209 | return 0; |
| 210 | } |
| 211 | MALLOC(sdl, struct sockaddr_dl *, sizeof *sdl, M_IFMADDR, |
| 212 | M_WAITOK); |
| 213 | sdl->sdl_len = sizeof *sdl; |
| 214 | sdl->sdl_family = AF_LINK; |
| 215 | sdl->sdl_index = ifp->if_index; |
| 216 | sdl->sdl_type = IFT_ETHER; |
| 217 | sdl->sdl_nlen = 0; |
| 218 | sdl->sdl_alen = ETHER_ADDR_LEN; |
| 219 | sdl->sdl_slen = 0; |
| 220 | e_addr = LLADDR(sdl); |
| 221 | ETHER_MAP_IPV6_MULTICAST(&sin6->sin6_addr, e_addr); |
| 222 | kprintf("ether_resolvemulti Adding %x:%x:%x:%x:%x:%x\n", |
| 223 | e_addr[0], e_addr[1], e_addr[2], e_addr[3], e_addr[4], e_addr[5]); |
| 224 | *llsa = (struct sockaddr *)sdl; |
| 225 | return 0; |
| 226 | #endif |
| 227 | |
| 228 | default: |
| 229 | /* |
| 230 | * Well, the text isn't quite right, but it's the name |
| 231 | * that counts... |
| 232 | */ |
| 233 | return EAFNOSUPPORT; |
| 234 | } |
| 235 | } |
| 236 | |
| 237 | |
| 238 | |
| 239 | |
| 240 | |
| 241 | u_char ether_ipmulticast_min[6] = { 0x01, 0x00, 0x5e, 0x00, 0x00, 0x00 }; |
| 242 | u_char ether_ipmulticast_max[6] = { 0x01, 0x00, 0x5e, 0x7f, 0xff, 0xff }; |
| 243 | /* |
| 244 | * Add an Ethernet multicast address or range of addresses to the list for a |
| 245 | * given interface. |
| 246 | */ |
| 247 | int |
| 248 | ether_addmulti(ifr, ac) |
| 249 | struct ifreq *ifr; |
| 250 | register struct arpcom *ac; |
| 251 | { |
| 252 | register struct ether_multi *enm; |
| 253 | struct sockaddr_in *sin; |
| 254 | u_char addrlo[6]; |
| 255 | u_char addrhi[6]; |
| 256 | int s = splimp(); |
| 257 | |
| 258 | switch (ifr->ifr_addr.sa_family) { |
| 259 | |
| 260 | case AF_UNSPEC: |
| 261 | bcopy(ifr->ifr_addr.sa_data, addrlo, 6); |
| 262 | bcopy(addrlo, addrhi, 6); |
| 263 | break; |
| 264 | |
| 265 | #if INET |
| 266 | case AF_INET: |
| 267 | sin = (struct sockaddr_in *)&(ifr->ifr_addr); |
| 268 | if (sin->sin_addr.s_addr == INADDR_ANY) { |
| 269 | /* |
| 270 | * An IP address of INADDR_ANY means listen to all |
| 271 | * of the Ethernet multicast addresses used for IP. |
| 272 | * (This is for the sake of IP multicast routers.) |
| 273 | */ |
| 274 | bcopy(ether_ipmulticast_min, addrlo, 6); |
| 275 | bcopy(ether_ipmulticast_max, addrhi, 6); |
| 276 | } |
| 277 | else { |
| 278 | ETHER_MAP_IP_MULTICAST(&sin->sin_addr, addrlo); |
| 279 | bcopy(addrlo, addrhi, 6); |
| 280 | } |
| 281 | break; |
| 282 | #endif |
| 283 | |
| 284 | default: |
| 285 | splx(s); |
| 286 | return (EAFNOSUPPORT); |
| 287 | } |
| 288 | |
| 289 | /* |
| 290 | * Verify that we have valid Ethernet multicast addresses. |
| 291 | */ |
| 292 | if ((addrlo[0] & 0x01) != 1 || (addrhi[0] & 0x01) != 1) { |
| 293 | splx(s); |
| 294 | return (EINVAL); |
| 295 | } |
| 296 | /* |
| 297 | * See if the address range is already in the list. |
| 298 | */ |
| 299 | ETHER_LOOKUP_MULTI(addrlo, addrhi, ac, enm); |
| 300 | if (enm != NULL) { |
| 301 | /* |
| 302 | * Found it; just increment the reference count. |
| 303 | */ |
| 304 | ++enm->enm_refcount; |
| 305 | splx(s); |
| 306 | return (0); |
| 307 | } |
| 308 | /* |
| 309 | * New address or range; malloc a new multicast record |
| 310 | * and link it into the interface's multicast list. |
| 311 | */ |
| 312 | enm = (struct ether_multi *)_MALLOC(sizeof(*enm), M_IFMADDR, M_WAITOK); |
| 313 | if (enm == NULL) { |
| 314 | splx(s); |
| 315 | return (ENOBUFS); |
| 316 | } |
| 317 | bcopy(addrlo, enm->enm_addrlo, 6); |
| 318 | bcopy(addrhi, enm->enm_addrhi, 6); |
| 319 | enm->enm_ac = ac; |
| 320 | enm->enm_refcount = 1; |
| 321 | enm->enm_next = ac->ac_multiaddrs; |
| 322 | ac->ac_multiaddrs = enm; |
| 323 | splx(s); |
| 324 | /* |
| 325 | * Return ENETRESET to inform the driver that the list has changed |
| 326 | * and its reception filter should be adjusted accordingly. |
| 327 | */ |
| 328 | return (ENETRESET); |
| 329 | } |
| 330 | |
| 331 | /* |
| 332 | * Delete a multicast address record. |
| 333 | */ |
| 334 | int |
| 335 | ether_delmulti(ifr, ac, ret_mca) |
| 336 | struct ifreq *ifr; |
| 337 | register struct arpcom *ac; |
| 338 | struct ether_addr * ret_mca; |
| 339 | { |
| 340 | register struct ether_multi *enm; |
| 341 | register struct ether_multi **p; |
| 342 | struct sockaddr_in *sin; |
| 343 | u_char addrlo[6]; |
| 344 | u_char addrhi[6]; |
| 345 | int s = splimp(); |
| 346 | |
| 347 | switch (ifr->ifr_addr.sa_family) { |
| 348 | |
| 349 | case AF_UNSPEC: |
| 350 | bcopy(ifr->ifr_addr.sa_data, addrlo, 6); |
| 351 | bcopy(addrlo, addrhi, 6); |
| 352 | break; |
| 353 | |
| 354 | #if INET |
| 355 | case AF_INET: |
| 356 | sin = (struct sockaddr_in *)&(ifr->ifr_addr); |
| 357 | if (sin->sin_addr.s_addr == INADDR_ANY) { |
| 358 | /* |
| 359 | * An IP address of INADDR_ANY means stop listening |
| 360 | * to the range of Ethernet multicast addresses used |
| 361 | * for IP. |
| 362 | */ |
| 363 | bcopy(ether_ipmulticast_min, addrlo, 6); |
| 364 | bcopy(ether_ipmulticast_max, addrhi, 6); |
| 365 | } |
| 366 | else { |
| 367 | ETHER_MAP_IP_MULTICAST(&sin->sin_addr, addrlo); |
| 368 | bcopy(addrlo, addrhi, 6); |
| 369 | } |
| 370 | break; |
| 371 | #endif |
| 372 | |
| 373 | default: |
| 374 | splx(s); |
| 375 | return (EAFNOSUPPORT); |
| 376 | } |
| 377 | |
| 378 | /* |
| 379 | * Look up the address in our list. |
| 380 | */ |
| 381 | ETHER_LOOKUP_MULTI(addrlo, addrhi, ac, enm); |
| 382 | if (enm == NULL) { |
| 383 | splx(s); |
| 384 | return (ENXIO); |
| 385 | } |
| 386 | if (--enm->enm_refcount != 0) { |
| 387 | /* |
| 388 | * Still some claims to this record. |
| 389 | */ |
| 390 | splx(s); |
| 391 | return (0); |
| 392 | } |
| 393 | |
| 394 | /* save the low and high address of the range before deletion */ |
| 395 | if (ret_mca) { |
| 396 | *ret_mca = *((struct ether_addr *)addrlo); |
| 397 | *(ret_mca + 1) = *((struct ether_addr *)addrhi); |
| 398 | } |
| 399 | |
| 400 | /* |
| 401 | * No remaining claims to this record; unlink and free it. |
| 402 | */ |
| 403 | for (p = &enm->enm_ac->ac_multiaddrs; |
| 404 | *p != enm; |
| 405 | p = &(*p)->enm_next) |
| 406 | continue; |
| 407 | *p = (*p)->enm_next; |
| 408 | FREE(enm, M_IFMADDR); |
| 409 | splx(s); |
| 410 | /* |
| 411 | * Return ENETRESET to inform the driver that the list has changed |
| 412 | * and its reception filter should be adjusted accordingly. |
| 413 | */ |
| 414 | return (ENETRESET); |
| 415 | } |
| 416 | |
| 417 | /* |
| 418 | * Convert Ethernet address to printable (loggable) representation. |
| 419 | */ |
| 420 | static u_char digits[] = "0123456789abcdef"; |
| 421 | char * |
| 422 | ether_sprintf(p, ap) |
| 423 | register u_char *p; |
| 424 | register u_char *ap; |
| 425 | { register char *cp; |
| 426 | register i; |
| 427 | |
| 428 | for (cp = p, i = 0; i < 6; i++) { |
| 429 | *cp++ = digits[*ap >> 4]; |
| 430 | *cp++ = digits[*ap++ & 0xf]; |
| 431 | *cp++ = ':'; |
| 432 | } |
| 433 | *--cp = 0; |
| 434 | return (p); |
| 435 | } |