Now available: The Design and Implementation of the FreeBSD Operating System (Second Edition)
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FreeBSD/Linux Kernel Cross Reference
sys/net/if_fddisubr.c
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1 /* 2 * Copyright (c) 1995, 1996 3 * Matt Thomas <matt@3am-software.com>. All rights reserved. 4 * Copyright (c) 1982, 1989, 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. All advertising materials mentioning features or use of this software 16 * must display the following acknowledgement: 17 * This product includes software developed by the University of 18 * California, Berkeley and its contributors. 19 * 4. Neither the name of the University nor the names of its contributors 20 * may be used to endorse or promote products derived from this software 21 * without specific prior written permission. 22 * 23 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND 24 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 25 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 26 * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE 27 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 28 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 29 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 30 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 31 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 32 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 33 * SUCH DAMAGE. 34 * 35 * from: if_ethersubr.c,v 1.5 1994/12/13 22:31:45 wollman Exp 36 * $FreeBSD$ 37 */ 38 39 #include "opt_atalk.h" 40 #include "opt_inet.h" 41 #include "opt_inet6.h" 42 #include "opt_ipx.h" 43 44 #include <sys/param.h> 45 #include <sys/systm.h> 46 #include <sys/mbuf.h> 47 #include <sys/socket.h> 48 #include <sys/malloc.h> 49 50 #include <net/if.h> 51 #include <net/netisr.h> 52 #include <net/route.h> 53 #include <net/if_llc.h> 54 #include <net/if_dl.h> 55 #include <net/if_types.h> 56 57 #if defined(INET) || defined(INET6) 58 #include <netinet/in.h> 59 #include <netinet/in_var.h> 60 #include <netinet/if_ether.h> 61 #endif 62 #ifdef INET6 63 #include <netinet6/nd6.h> 64 #endif 65 #if defined(__FreeBSD__) 66 #include <netinet/if_fddi.h> 67 #else 68 #include <net/if_fddi.h> 69 #endif 70 71 #ifdef IPX 72 #include <netipx/ipx.h> 73 #include <netipx/ipx_if.h> 74 #endif 75 76 #ifdef NS 77 #include <netns/ns.h> 78 #include <netns/ns_if.h> 79 #endif 80 81 #ifdef DECNET 82 #include <netdnet/dn.h> 83 #endif 84 85 #ifdef NETATALK 86 #include <netatalk/at.h> 87 #include <netatalk/at_var.h> 88 #include <netatalk/at_extern.h> 89 90 #define llc_snap_org_code llc_un.type_snap.org_code 91 #define llc_snap_ether_type llc_un.type_snap.ether_type 92 93 extern u_char at_org_code[ 3 ]; 94 extern u_char aarp_org_code[ 3 ]; 95 #endif /* NETATALK */ 96 97 static int fddi_resolvemulti __P((struct ifnet *, struct sockaddr **, 98 struct sockaddr *)); 99 100 #define senderr(e) { error = (e); goto bad;} 101 102 /* 103 * This really should be defined in if_llc.h but in case it isn't. 104 */ 105 #ifndef llc_snap 106 #define llc_snap llc_un.type_snap 107 #endif 108 109 #if defined(__bsdi__) || defined(__NetBSD__) 110 #define RTALLOC1(a, b) rtalloc1(a, b) 111 #define ARPRESOLVE(a, b, c, d, e, f) arpresolve(a, b, c, d, e) 112 #elif defined(__FreeBSD__) 113 #define RTALLOC1(a, b) rtalloc1(a, b, 0UL) 114 #define ARPRESOLVE(a, b, c, d, e, f) arpresolve(a, b, c, d, e, f) 115 #endif 116 /* 117 * FDDI output routine. 118 * Encapsulate a packet of type family for the local net. 119 * Use trailer local net encapsulation if enough data in first 120 * packet leaves a multiple of 512 bytes of data in remainder. 121 * Assumes that ifp is actually pointer to arpcom structure. 122 */ 123 int 124 fddi_output(ifp, m, dst, rt0) 125 register struct ifnet *ifp; 126 struct mbuf *m; 127 struct sockaddr *dst; 128 struct rtentry *rt0; 129 { 130 u_int16_t type; 131 int s, loop_copy = 0, error = 0, hdrcmplt = 0; 132 u_char esrc[6], edst[6]; 133 register struct rtentry *rt; 134 register struct fddi_header *fh; 135 struct arpcom *ac = (struct arpcom *)ifp; 136 137 if ((ifp->if_flags & (IFF_UP|IFF_RUNNING)) != (IFF_UP|IFF_RUNNING)) 138 senderr(ENETDOWN); 139 getmicrotime(&ifp->if_lastchange); 140 #if !defined(__bsdi__) || _BSDI_VERSION >= 199401 141 if ((rt = rt0) != NULL) { 142 if ((rt->rt_flags & RTF_UP) == 0) { 143 if ((rt0 = rt = RTALLOC1(dst, 1)) != NULL) 144 rt->rt_refcnt--; 145 else 146 senderr(EHOSTUNREACH); 147 } 148 if (rt->rt_flags & RTF_GATEWAY) { 149 if (rt->rt_gwroute == 0) 150 goto lookup; 151 if (((rt = rt->rt_gwroute)->rt_flags & RTF_UP) == 0) { 152 rtfree(rt); rt = rt0; 153 lookup: rt->rt_gwroute = RTALLOC1(rt->rt_gateway, 1); 154 if ((rt = rt->rt_gwroute) == 0) 155 senderr(EHOSTUNREACH); 156 } 157 } 158 if (rt->rt_flags & RTF_REJECT) 159 if (rt->rt_rmx.rmx_expire == 0 || 160 time_second < rt->rt_rmx.rmx_expire) 161 senderr(rt == rt0 ? EHOSTDOWN : EHOSTUNREACH); 162 } 163 #endif 164 switch (dst->sa_family) { 165 166 #ifdef INET 167 case AF_INET: { 168 #if !defined(__bsdi__) || _BSDI_VERSION >= 199401 169 if (!ARPRESOLVE(ifp, rt, m, dst, edst, rt0)) 170 return (0); /* if not yet resolved */ 171 #else 172 int usetrailers; 173 if (!arpresolve(ac, m, &((struct sockaddr_in *)dst)->sin_addr, edst, &usetrailers)) 174 return (0); /* if not yet resolved */ 175 #endif 176 type = htons(ETHERTYPE_IP); 177 break; 178 } 179 #endif 180 #ifdef INET6 181 case AF_INET6: 182 if (!nd6_storelladdr(&ac->ac_if, rt, m, dst, (u_char *)edst)) { 183 /* Something bad happened */ 184 return(0); 185 } 186 type = htons(ETHERTYPE_IPV6); 187 break; 188 #endif 189 #ifdef IPX 190 case AF_IPX: 191 type = htons(ETHERTYPE_IPX); 192 bcopy((caddr_t)&(((struct sockaddr_ipx *)dst)->sipx_addr.x_host), 193 (caddr_t)edst, sizeof (edst)); 194 break; 195 #endif 196 #ifdef NETATALK 197 case AF_APPLETALK: { 198 struct at_ifaddr *aa; 199 if (!aarpresolve(ac, m, (struct sockaddr_at *)dst, edst)) 200 return (0); 201 /* 202 * ifaddr is the first thing in at_ifaddr 203 */ 204 if ((aa = at_ifawithnet( (struct sockaddr_at *)dst)) == 0) 205 goto bad; 206 207 /* 208 * In the phase 2 case, we need to prepend an mbuf for the llc header. 209 * Since we must preserve the value of m, which is passed to us by 210 * value, we m_copy() the first mbuf, and use it for our llc header. 211 */ 212 if (aa->aa_flags & AFA_PHASE2) { 213 struct llc llc; 214 215 M_PREPEND(m, sizeof(struct llc), M_WAIT); 216 if (m == 0) 217 senderr(ENOBUFS); 218 llc.llc_dsap = llc.llc_ssap = LLC_SNAP_LSAP; 219 llc.llc_control = LLC_UI; 220 bcopy(at_org_code, llc.llc_snap_org_code, sizeof(at_org_code)); 221 llc.llc_snap_ether_type = htons(ETHERTYPE_AT); 222 bcopy(&llc, mtod(m, caddr_t), sizeof(struct llc)); 223 type = 0; 224 } else { 225 type = htons(ETHERTYPE_AT); 226 } 227 break; 228 } 229 #endif /* NETATALK */ 230 #ifdef NS 231 case AF_NS: 232 type = htons(ETHERTYPE_NS); 233 bcopy((caddr_t)&(((struct sockaddr_ns *)dst)->sns_addr.x_host), 234 (caddr_t)edst, sizeof (edst)); 235 break; 236 #endif 237 238 case pseudo_AF_HDRCMPLT: 239 { 240 struct ether_header *eh; 241 hdrcmplt = 1; 242 eh = (struct ether_header *)dst->sa_data; 243 (void)memcpy((caddr_t)esrc, (caddr_t)eh->ether_shost, sizeof (esrc)); 244 /* FALLTHROUGH */ 245 } 246 247 case AF_UNSPEC: 248 { 249 struct ether_header *eh; 250 loop_copy = -1; 251 eh = (struct ether_header *)dst->sa_data; 252 (void)memcpy((caddr_t)edst, (caddr_t)eh->ether_dhost, sizeof (edst)); 253 if (*edst & 1) 254 m->m_flags |= (M_BCAST|M_MCAST); 255 type = eh->ether_type; 256 break; 257 } 258 259 case AF_IMPLINK: 260 { 261 fh = mtod(m, struct fddi_header *); 262 error = EPROTONOSUPPORT; 263 switch (fh->fddi_fc & (FDDIFC_C|FDDIFC_L|FDDIFC_F)) { 264 case FDDIFC_LLC_ASYNC: { 265 /* legal priorities are 0 through 7 */ 266 if ((fh->fddi_fc & FDDIFC_Z) > 7) 267 goto bad; 268 break; 269 } 270 case FDDIFC_LLC_SYNC: { 271 /* FDDIFC_Z bits reserved, must be zero */ 272 if (fh->fddi_fc & FDDIFC_Z) 273 goto bad; 274 break; 275 } 276 case FDDIFC_SMT: { 277 /* FDDIFC_Z bits must be non zero */ 278 if ((fh->fddi_fc & FDDIFC_Z) == 0) 279 goto bad; 280 break; 281 } 282 default: { 283 /* anything else is too dangerous */ 284 goto bad; 285 } 286 } 287 error = 0; 288 if (fh->fddi_dhost[0] & 1) 289 m->m_flags |= (M_BCAST|M_MCAST); 290 goto queue_it; 291 } 292 default: 293 printf("%s%d: can't handle af%d\n", ifp->if_name, ifp->if_unit, 294 dst->sa_family); 295 senderr(EAFNOSUPPORT); 296 } 297 298 if (type != 0) { 299 register struct llc *l; 300 M_PREPEND(m, sizeof (struct llc), M_DONTWAIT); 301 if (m == 0) 302 senderr(ENOBUFS); 303 l = mtod(m, struct llc *); 304 l->llc_control = LLC_UI; 305 l->llc_dsap = l->llc_ssap = LLC_SNAP_LSAP; 306 l->llc_snap.org_code[0] = l->llc_snap.org_code[1] = l->llc_snap.org_code[2] = 0; 307 (void)memcpy((caddr_t) &l->llc_snap.ether_type, (caddr_t) &type, 308 sizeof(u_int16_t)); 309 } 310 311 /* 312 * Add local net header. If no space in first mbuf, 313 * allocate another. 314 */ 315 M_PREPEND(m, sizeof (struct fddi_header), M_DONTWAIT); 316 if (m == 0) 317 senderr(ENOBUFS); 318 fh = mtod(m, struct fddi_header *); 319 fh->fddi_fc = FDDIFC_LLC_ASYNC|FDDIFC_LLC_PRIO4; 320 (void)memcpy((caddr_t)fh->fddi_dhost, (caddr_t)edst, sizeof (edst)); 321 queue_it: 322 if (hdrcmplt) 323 (void)memcpy((caddr_t)fh->fddi_shost, (caddr_t)esrc, 324 sizeof(fh->fddi_shost)); 325 else 326 (void)memcpy((caddr_t)fh->fddi_shost, (caddr_t)ac->ac_enaddr, 327 sizeof(fh->fddi_shost)); 328 /* 329 * If a simplex interface, and the packet is being sent to our 330 * Ethernet address or a broadcast address, loopback a copy. 331 * XXX To make a simplex device behave exactly like a duplex 332 * device, we should copy in the case of sending to our own 333 * ethernet address (thus letting the original actually appear 334 * on the wire). However, we don't do that here for security 335 * reasons and compatibility with the original behavior. 336 */ 337 if ((ifp->if_flags & IFF_SIMPLEX) && 338 (loop_copy != -1)) { 339 if ((m->m_flags & M_BCAST) || loop_copy) { 340 struct mbuf *n = m_copy(m, 0, (int)M_COPYALL); 341 342 (void) if_simloop(ifp, 343 n, dst->sa_family, sizeof(struct fddi_header)); 344 } else if (bcmp(fh->fddi_dhost, 345 fh->fddi_shost, sizeof(fh->fddi_shost)) == 0) { 346 (void) if_simloop(ifp, 347 m, dst->sa_family, sizeof(struct fddi_header)); 348 return(0); /* XXX */ 349 } 350 } 351 352 s = splimp(); 353 /* 354 * Queue message on interface, and start output if interface 355 * not yet active. 356 */ 357 if (IF_QFULL(&ifp->if_snd)) { 358 IF_DROP(&ifp->if_snd); 359 splx(s); 360 senderr(ENOBUFS); 361 } 362 ifp->if_obytes += m->m_pkthdr.len; 363 if (m->m_flags & M_MCAST) 364 ifp->if_omcasts++; 365 IF_ENQUEUE(&ifp->if_snd, m); 366 if ((ifp->if_flags & IFF_OACTIVE) == 0) 367 (*ifp->if_start)(ifp); 368 splx(s); 369 return (error); 370 371 bad: 372 if (m) 373 m_freem(m); 374 return (error); 375 } 376 377 /* 378 * Process a received FDDI packet; 379 * the packet is in the mbuf chain m without 380 * the fddi header, which is provided separately. 381 */ 382 void 383 fddi_input(ifp, fh, m) 384 struct ifnet *ifp; 385 register struct fddi_header *fh; 386 struct mbuf *m; 387 { 388 register struct ifqueue *inq; 389 register struct llc *l; 390 int s; 391 392 if ((ifp->if_flags & IFF_UP) == 0) { 393 m_freem(m); 394 return; 395 } 396 getmicrotime(&ifp->if_lastchange); 397 ifp->if_ibytes += m->m_pkthdr.len + sizeof (*fh); 398 if (fh->fddi_dhost[0] & 1) { 399 if (bcmp((caddr_t)fddibroadcastaddr, (caddr_t)fh->fddi_dhost, 400 sizeof(fddibroadcastaddr)) == 0) 401 m->m_flags |= M_BCAST; 402 else 403 m->m_flags |= M_MCAST; 404 ifp->if_imcasts++; 405 } else if ((ifp->if_flags & IFF_PROMISC) 406 && bcmp(((struct arpcom *)ifp)->ac_enaddr, (caddr_t)fh->fddi_dhost, 407 sizeof(fh->fddi_dhost)) != 0) { 408 m_freem(m); 409 return; 410 } 411 412 #ifdef M_LINK0 413 /* 414 * If this has a LLC priority of 0, then mark it so upper 415 * layers have a hint that it really came via a FDDI/Ethernet 416 * bridge. 417 */ 418 if ((fh->fddi_fc & FDDIFC_LLC_PRIO7) == FDDIFC_LLC_PRIO0) 419 m->m_flags |= M_LINK0; 420 #endif 421 422 l = mtod(m, struct llc *); 423 switch (l->llc_dsap) { 424 #if defined(INET) || defined(INET6) || defined(NS) || defined(DECNET) || defined(IPX) || defined(NETATALK) 425 case LLC_SNAP_LSAP: 426 { 427 u_int16_t type; 428 if (l->llc_control != LLC_UI || l->llc_ssap != LLC_SNAP_LSAP) 429 goto dropanyway; 430 #ifdef NETATALK 431 if (Bcmp(&(l->llc_snap_org_code)[0], at_org_code, 432 sizeof(at_org_code)) == 0 && 433 ntohs(l->llc_snap_ether_type) == ETHERTYPE_AT) { 434 inq = &atintrq2; 435 m_adj( m, sizeof( struct llc )); 436 schednetisr(NETISR_ATALK); 437 break; 438 } 439 440 if (Bcmp(&(l->llc_snap_org_code)[0], aarp_org_code, 441 sizeof(aarp_org_code)) == 0 && 442 ntohs(l->llc_snap_ether_type) == ETHERTYPE_AARP) { 443 m_adj( m, sizeof( struct llc )); 444 aarpinput((struct arpcom *)ifp, m); /* XXX */ 445 return; 446 } 447 #endif /* NETATALK */ 448 if (l->llc_snap.org_code[0] != 0 || l->llc_snap.org_code[1] != 0|| l->llc_snap.org_code[2] != 0) 449 goto dropanyway; 450 type = ntohs(l->llc_snap.ether_type); 451 m_adj(m, 8); 452 switch (type) { 453 #ifdef INET 454 case ETHERTYPE_IP: 455 if (ipflow_fastforward(m)) 456 return; 457 schednetisr(NETISR_IP); 458 inq = &ipintrq; 459 break; 460 461 case ETHERTYPE_ARP: 462 if (ifp->if_flags & IFF_NOARP) 463 goto dropanyway; 464 schednetisr(NETISR_ARP); 465 inq = &arpintrq; 466 break; 467 #endif 468 #ifdef INET6 469 case ETHERTYPE_IPV6: 470 schednetisr(NETISR_IPV6); 471 inq = &ip6intrq; 472 break; 473 #endif 474 #ifdef IPX 475 case ETHERTYPE_IPX: 476 schednetisr(NETISR_IPX); 477 inq = &ipxintrq; 478 break; 479 #endif 480 #ifdef NS 481 case ETHERTYPE_NS: 482 schednetisr(NETISR_NS); 483 inq = &nsintrq; 484 break; 485 #endif 486 #ifdef DECNET 487 case ETHERTYPE_DECNET: 488 schednetisr(NETISR_DECNET); 489 inq = &decnetintrq; 490 break; 491 #endif 492 #ifdef NETATALK 493 case ETHERTYPE_AT: 494 schednetisr(NETISR_ATALK); 495 inq = &atintrq1; 496 break; 497 case ETHERTYPE_AARP: 498 /* probably this should be done with a NETISR as well */ 499 aarpinput((struct arpcom *)ifp, m); /* XXX */ 500 return; 501 #endif /* NETATALK */ 502 default: 503 /* printf("fddi_input: unknown protocol 0x%x\n", type); */ 504 ifp->if_noproto++; 505 goto dropanyway; 506 } 507 break; 508 } 509 #endif /* INET || NS */ 510 511 default: 512 /* printf("fddi_input: unknown dsap 0x%x\n", l->llc_dsap); */ 513 ifp->if_noproto++; 514 dropanyway: 515 m_freem(m); 516 return; 517 } 518 519 s = splimp(); 520 if (IF_QFULL(inq)) { 521 IF_DROP(inq); 522 m_freem(m); 523 } else 524 IF_ENQUEUE(inq, m); 525 splx(s); 526 } 527 /* 528 * Perform common duties while attaching to interface list 529 */ 530 #ifdef __NetBSD__ 531 #define ifa_next ifa_list.tqe_next 532 #endif 533 534 void 535 fddi_ifattach(ifp) 536 register struct ifnet *ifp; 537 { 538 register struct ifaddr *ifa; 539 register struct sockaddr_dl *sdl; 540 541 ifp->if_type = IFT_FDDI; 542 ifp->if_addrlen = 6; 543 ifp->if_hdrlen = 21; 544 ifp->if_mtu = FDDIMTU; 545 ifp->if_resolvemulti = fddi_resolvemulti; 546 ifp->if_baudrate = 100000000; 547 #ifdef IFF_NOTRAILERS 548 ifp->if_flags |= IFF_NOTRAILERS; 549 #endif 550 #if defined(__FreeBSD__) 551 ifa = ifnet_addrs[ifp->if_index - 1]; 552 sdl = (struct sockaddr_dl *)ifa->ifa_addr; 553 sdl->sdl_type = IFT_FDDI; 554 sdl->sdl_alen = ifp->if_addrlen; 555 bcopy(((struct arpcom *)ifp)->ac_enaddr, LLADDR(sdl), ifp->if_addrlen); 556 #elif defined(__NetBSD__) 557 LIST_INIT(&((struct arpcom *)ifp)->ac_multiaddrs); 558 for (ifa = ifp->if_addrlist.tqh_first; ifa != NULL; ifa = ifa->ifa_list.tqe_next) 559 #else 560 for (ifa = ifp->if_addrlist; ifa != NULL; ifa = ifa->ifa_next) 561 #endif 562 #if !defined(__FreeBSD__) 563 if ((sdl = (struct sockaddr_dl *)ifa->ifa_addr) && 564 sdl->sdl_family == AF_LINK) { 565 sdl->sdl_type = IFT_FDDI; 566 sdl->sdl_alen = ifp->if_addrlen; 567 bcopy((caddr_t)((struct arpcom *)ifp)->ac_enaddr, 568 LLADDR(sdl), ifp->if_addrlen); 569 break; 570 } 571 #endif 572 } 573 574 static int 575 fddi_resolvemulti(ifp, llsa, sa) 576 struct ifnet *ifp; 577 struct sockaddr **llsa; 578 struct sockaddr *sa; 579 { 580 struct sockaddr_dl *sdl; 581 struct sockaddr_in *sin; 582 #ifdef INET6 583 struct sockaddr_in6 *sin6; 584 #endif 585 u_char *e_addr; 586 587 switch(sa->sa_family) { 588 case AF_LINK: 589 /* 590 * No mapping needed. Just check that it's a valid MC address. 591 */ 592 sdl = (struct sockaddr_dl *)sa; 593 e_addr = LLADDR(sdl); 594 if ((e_addr[0] & 1) != 1) 595 return EADDRNOTAVAIL; 596 *llsa = 0; 597 return 0; 598 599 #ifdef INET 600 case AF_INET: 601 sin = (struct sockaddr_in *)sa; 602 if (!IN_MULTICAST(ntohl(sin->sin_addr.s_addr))) 603 return EADDRNOTAVAIL; 604 MALLOC(sdl, struct sockaddr_dl *, sizeof *sdl, M_IFMADDR, 605 M_WAITOK); 606 sdl->sdl_len = sizeof *sdl; 607 sdl->sdl_family = AF_LINK; 608 sdl->sdl_index = ifp->if_index; 609 sdl->sdl_type = IFT_FDDI; 610 sdl->sdl_nlen = 0; 611 sdl->sdl_alen = ETHER_ADDR_LEN; /* XXX */ 612 sdl->sdl_slen = 0; 613 e_addr = LLADDR(sdl); 614 ETHER_MAP_IP_MULTICAST(&sin->sin_addr, e_addr); 615 *llsa = (struct sockaddr *)sdl; 616 return 0; 617 #endif 618 #ifdef INET6 619 case AF_INET6: 620 sin6 = (struct sockaddr_in6 *)sa; 621 if (IN6_IS_ADDR_UNSPECIFIED(&sin6->sin6_addr)) { 622 /* 623 * An IP6 address of 0 means listen to all 624 * of the Ethernet multicast address used for IP6. 625 * (This is used for multicast routers.) 626 */ 627 ifp->if_flags |= IFF_ALLMULTI; 628 *llsa = 0; 629 return 0; 630 } 631 if (!IN6_IS_ADDR_MULTICAST(&sin6->sin6_addr)) 632 return EADDRNOTAVAIL; 633 MALLOC(sdl, struct sockaddr_dl *, sizeof *sdl, M_IFMADDR, 634 M_WAITOK); 635 sdl->sdl_len = sizeof *sdl; 636 sdl->sdl_family = AF_LINK; 637 sdl->sdl_index = ifp->if_index; 638 sdl->sdl_type = IFT_FDDI; 639 sdl->sdl_nlen = 0; 640 sdl->sdl_alen = ETHER_ADDR_LEN; /* XXX */ 641 sdl->sdl_slen = 0; 642 e_addr = LLADDR(sdl); 643 ETHER_MAP_IPV6_MULTICAST(&sin6->sin6_addr, e_addr); 644 *llsa = (struct sockaddr *)sdl; 645 return 0; 646 #endif 647 648 default: 649 /* 650 * Well, the text isn't quite right, but it's the name 651 * that counts... 652 */ 653 return EAFNOSUPPORT; 654 } 655 }
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