if_fddisubr.c revision 68180
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: head/sys/net/if_fddisubr.c 68180 2000-11-01 16:57:01Z ume $ 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 49#include <net/if.h> 50#include <net/netisr.h> 51#include <net/route.h> 52#include <net/if_llc.h> 53#include <net/if_dl.h> 54#include <net/if_types.h> 55 56#if defined(INET) || defined(INET6) 57#include <netinet/in.h> 58#include <netinet/in_var.h> 59#include <netinet/if_ether.h> 60#endif 61#ifdef INET6 62#include <netinet6/nd6.h> 63#endif 64#if defined(__FreeBSD__) 65#include <netinet/if_fddi.h> 66#else 67#include <net/if_fddi.h> 68#endif 69 70#ifdef IPX 71#include <netipx/ipx.h> 72#include <netipx/ipx_if.h> 73#endif 74 75#ifdef NS 76#include <netns/ns.h> 77#include <netns/ns_if.h> 78#endif 79 80#ifdef DECNET 81#include <netdnet/dn.h> 82#endif 83 84#ifdef NETATALK 85#include <netatalk/at.h> 86#include <netatalk/at_var.h> 87#include <netatalk/at_extern.h> 88 89#define llc_snap_org_code llc_un.type_snap.org_code 90#define llc_snap_ether_type llc_un.type_snap.ether_type 91 92extern u_char at_org_code[ 3 ]; 93extern u_char aarp_org_code[ 3 ]; 94#endif /* NETATALK */ 95 96static int fddi_resolvemulti __P((struct ifnet *, struct sockaddr **, 97 struct sockaddr *)); 98 99#define senderr(e) { error = (e); goto bad;} 100 101/* 102 * This really should be defined in if_llc.h but in case it isn't. 103 */ 104#ifndef llc_snap 105#define llc_snap llc_un.type_snap 106#endif 107 108#if defined(__bsdi__) || defined(__NetBSD__) 109#define RTALLOC1(a, b) rtalloc1(a, b) 110#define ARPRESOLVE(a, b, c, d, e, f) arpresolve(a, b, c, d, e) 111#elif defined(__FreeBSD__) 112#define RTALLOC1(a, b) rtalloc1(a, b, 0UL) 113#define ARPRESOLVE(a, b, c, d, e, f) arpresolve(a, b, c, d, e, f) 114#endif 115/* 116 * FDDI output routine. 117 * Encapsulate a packet of type family for the local net. 118 * Use trailer local net encapsulation if enough data in first 119 * packet leaves a multiple of 512 bytes of data in remainder. 120 * Assumes that ifp is actually pointer to arpcom structure. 121 */ 122int 123fddi_output(ifp, m, dst, rt0) 124 register struct ifnet *ifp; 125 struct mbuf *m; 126 struct sockaddr *dst; 127 struct rtentry *rt0; 128{ 129 u_int16_t type; 130 int s, loop_copy = 0, error = 0, hdrcmplt = 0; 131 u_char esrc[6], edst[6]; 132 register struct rtentry *rt; 133 register struct fddi_header *fh; 134 struct arpcom *ac = (struct arpcom *)ifp; 135 136 if ((ifp->if_flags & (IFF_UP|IFF_RUNNING)) != (IFF_UP|IFF_RUNNING)) 137 senderr(ENETDOWN); 138 getmicrotime(&ifp->if_lastchange); 139#if !defined(__bsdi__) || _BSDI_VERSION >= 199401 140 if ((rt = rt0) != NULL) { 141 if ((rt->rt_flags & RTF_UP) == 0) { 142 if ((rt0 = rt = RTALLOC1(dst, 1)) != NULL) 143 rt->rt_refcnt--; 144 else 145 senderr(EHOSTUNREACH); 146 } 147 if (rt->rt_flags & RTF_GATEWAY) { 148 if (rt->rt_gwroute == 0) 149 goto lookup; 150 if (((rt = rt->rt_gwroute)->rt_flags & RTF_UP) == 0) { 151 rtfree(rt); rt = rt0; 152 lookup: rt->rt_gwroute = RTALLOC1(rt->rt_gateway, 1); 153 if ((rt = rt->rt_gwroute) == 0) 154 senderr(EHOSTUNREACH); 155 } 156 } 157 if (rt->rt_flags & RTF_REJECT) 158 if (rt->rt_rmx.rmx_expire == 0 || 159 time_second < rt->rt_rmx.rmx_expire) 160 senderr(rt == rt0 ? EHOSTDOWN : EHOSTUNREACH); 161 } 162#endif 163 switch (dst->sa_family) { 164 165#ifdef INET 166 case AF_INET: { 167#if !defined(__bsdi__) || _BSDI_VERSION >= 199401 168 if (!ARPRESOLVE(ac, rt, m, dst, edst, rt0)) 169 return (0); /* if not yet resolved */ 170#else 171 int usetrailers; 172 if (!arpresolve(ac, m, &((struct sockaddr_in *)dst)->sin_addr, edst, &usetrailers)) 173 return (0); /* if not yet resolved */ 174#endif 175 type = htons(ETHERTYPE_IP); 176 break; 177 } 178#endif 179#ifdef INET6 180 case AF_INET6: 181 if (!nd6_storelladdr(&ac->ac_if, rt, m, dst, (u_char *)edst)) { 182 /* this must be impossible, so we bark */ 183 printf("nd6_storelladdr failed\n"); 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 371bad: 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 */ 382void 383fddi_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 !defined(__bsdi__) || _BSDI_VERSION >= 199401 463 schednetisr(NETISR_ARP); 464 inq = &arpintrq; 465 break; 466#else 467 arpinput((struct arpcom *)ifp, m); 468 return; 469#endif 470#endif 471#ifdef INET6 472 case ETHERTYPE_IPV6: 473 schednetisr(NETISR_IPV6); 474 inq = &ip6intrq; 475 break; 476#endif 477#ifdef IPX 478 case ETHERTYPE_IPX: 479 schednetisr(NETISR_IPX); 480 inq = &ipxintrq; 481 break; 482#endif 483#ifdef NS 484 case ETHERTYPE_NS: 485 schednetisr(NETISR_NS); 486 inq = &nsintrq; 487 break; 488#endif 489#ifdef DECNET 490 case ETHERTYPE_DECNET: 491 schednetisr(NETISR_DECNET); 492 inq = &decnetintrq; 493 break; 494#endif 495#ifdef NETATALK 496 case ETHERTYPE_AT: 497 schednetisr(NETISR_ATALK); 498 inq = &atintrq1; 499 break; 500 case ETHERTYPE_AARP: 501 /* probably this should be done with a NETISR as well */ 502 aarpinput((struct arpcom *)ifp, m); /* XXX */ 503 return; 504#endif /* NETATALK */ 505 default: 506 /* printf("fddi_input: unknown protocol 0x%x\n", type); */ 507 ifp->if_noproto++; 508 goto dropanyway; 509 } 510 break; 511 } 512#endif /* INET || NS */ 513 514 default: 515 /* printf("fddi_input: unknown dsap 0x%x\n", l->llc_dsap); */ 516 ifp->if_noproto++; 517 dropanyway: 518 m_freem(m); 519 return; 520 } 521 522 s = splimp(); 523 if (IF_QFULL(inq)) { 524 IF_DROP(inq); 525 m_freem(m); 526 } else 527 IF_ENQUEUE(inq, m); 528 splx(s); 529} 530/* 531 * Perform common duties while attaching to interface list 532 */ 533#ifdef __NetBSD__ 534#define ifa_next ifa_list.tqe_next 535#endif 536 537void 538fddi_ifattach(ifp) 539 register struct ifnet *ifp; 540{ 541 register struct ifaddr *ifa; 542 register struct sockaddr_dl *sdl; 543 544 ifp->if_type = IFT_FDDI; 545 ifp->if_addrlen = 6; 546 ifp->if_hdrlen = 21; 547 ifp->if_mtu = FDDIMTU; 548 ifp->if_resolvemulti = fddi_resolvemulti; 549 ifp->if_baudrate = 100000000; 550#ifdef IFF_NOTRAILERS 551 ifp->if_flags |= IFF_NOTRAILERS; 552#endif 553#if defined(__FreeBSD__) 554 ifa = ifnet_addrs[ifp->if_index - 1]; 555 sdl = (struct sockaddr_dl *)ifa->ifa_addr; 556 sdl->sdl_type = IFT_FDDI; 557 sdl->sdl_alen = ifp->if_addrlen; 558 bcopy(((struct arpcom *)ifp)->ac_enaddr, LLADDR(sdl), ifp->if_addrlen); 559#elif defined(__NetBSD__) 560 LIST_INIT(&((struct arpcom *)ifp)->ac_multiaddrs); 561 for (ifa = ifp->if_addrlist.tqh_first; ifa != NULL; ifa = ifa->ifa_list.tqe_next) 562#else 563 for (ifa = ifp->if_addrlist; ifa != NULL; ifa = ifa->ifa_next) 564#endif 565#if !defined(__FreeBSD__) 566 if ((sdl = (struct sockaddr_dl *)ifa->ifa_addr) && 567 sdl->sdl_family == AF_LINK) { 568 sdl->sdl_type = IFT_FDDI; 569 sdl->sdl_alen = ifp->if_addrlen; 570 bcopy((caddr_t)((struct arpcom *)ifp)->ac_enaddr, 571 LLADDR(sdl), ifp->if_addrlen); 572 break; 573 } 574#endif 575} 576 577static int 578fddi_resolvemulti(ifp, llsa, sa) 579 struct ifnet *ifp; 580 struct sockaddr **llsa; 581 struct sockaddr *sa; 582{ 583 struct sockaddr_dl *sdl; 584 struct sockaddr_in *sin; 585#ifdef INET6 586 struct sockaddr_in6 *sin6; 587#endif 588 u_char *e_addr; 589 590 switch(sa->sa_family) { 591 case AF_LINK: 592 /* 593 * No mapping needed. Just check that it's a valid MC address. 594 */ 595 sdl = (struct sockaddr_dl *)sa; 596 e_addr = LLADDR(sdl); 597 if ((e_addr[0] & 1) != 1) 598 return EADDRNOTAVAIL; 599 *llsa = 0; 600 return 0; 601 602#ifdef INET 603 case AF_INET: 604 sin = (struct sockaddr_in *)sa; 605 if (!IN_MULTICAST(ntohl(sin->sin_addr.s_addr))) 606 return EADDRNOTAVAIL; 607 MALLOC(sdl, struct sockaddr_dl *, sizeof *sdl, M_IFMADDR, 608 M_WAITOK); 609 sdl->sdl_len = sizeof *sdl; 610 sdl->sdl_family = AF_LINK; 611 sdl->sdl_index = ifp->if_index; 612 sdl->sdl_type = IFT_FDDI; 613 sdl->sdl_nlen = 0; 614 sdl->sdl_alen = ETHER_ADDR_LEN; /* XXX */ 615 sdl->sdl_slen = 0; 616 e_addr = LLADDR(sdl); 617 ETHER_MAP_IP_MULTICAST(&sin->sin_addr, e_addr); 618 *llsa = (struct sockaddr *)sdl; 619 return 0; 620#endif 621#ifdef INET6 622 case AF_INET6: 623 sin6 = (struct sockaddr_in6 *)sa; 624 if (IN6_IS_ADDR_UNSPECIFIED(&sin6->sin6_addr)) { 625 /* 626 * An IP6 address of 0 means listen to all 627 * of the Ethernet multicast address used for IP6. 628 * (This is used for multicast routers.) 629 */ 630 ifp->if_flags |= IFF_ALLMULTI; 631 *llsa = 0; 632 return 0; 633 } 634 if (!IN6_IS_ADDR_MULTICAST(&sin6->sin6_addr)) 635 return EADDRNOTAVAIL; 636 MALLOC(sdl, struct sockaddr_dl *, sizeof *sdl, M_IFMADDR, 637 M_WAITOK); 638 sdl->sdl_len = sizeof *sdl; 639 sdl->sdl_family = AF_LINK; 640 sdl->sdl_index = ifp->if_index; 641 sdl->sdl_type = IFT_FDDI; 642 sdl->sdl_nlen = 0; 643 sdl->sdl_alen = ETHER_ADDR_LEN; /* XXX */ 644 sdl->sdl_slen = 0; 645 e_addr = LLADDR(sdl); 646 ETHER_MAP_IPV6_MULTICAST(&sin6->sin6_addr, e_addr); 647 *llsa = (struct sockaddr *)sdl; 648 return 0; 649#endif 650 651 default: 652 /* 653 * Well, the text isn't quite right, but it's the name 654 * that counts... 655 */ 656 return EAFNOSUPPORT; 657 } 658} 659