if_fddisubr.c revision 121436
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 121436 2003-10-23 17:47:55Z imp $ 37 */ 38 39#include "opt_atalk.h" 40#include "opt_inet.h" 41#include "opt_inet6.h" 42#include "opt_ipx.h" 43#include "opt_mac.h" 44 45#include <sys/param.h> 46#include <sys/systm.h> 47#include <sys/kernel.h> 48#include <sys/mac.h> 49#include <sys/malloc.h> 50#include <sys/mbuf.h> 51#include <sys/module.h> 52#include <sys/socket.h> 53#include <sys/sockio.h> 54 55#include <net/if.h> 56#include <net/if_dl.h> 57#include <net/if_llc.h> 58#include <net/if_types.h> 59 60#include <net/netisr.h> 61#include <net/route.h> 62#include <net/bpf.h> 63#include <net/fddi.h> 64 65#if defined(INET) || defined(INET6) 66#include <netinet/in.h> 67#include <netinet/in_var.h> 68#include <netinet/if_ether.h> 69#endif 70#ifdef INET6 71#include <netinet6/nd6.h> 72#endif 73 74#ifdef IPX 75#include <netipx/ipx.h> 76#include <netipx/ipx_if.h> 77#endif 78 79#ifdef DECNET 80#include <netdnet/dn.h> 81#endif 82 83#ifdef NETATALK 84#include <netatalk/at.h> 85#include <netatalk/at_var.h> 86#include <netatalk/at_extern.h> 87 88extern u_char at_org_code[ 3 ]; 89extern u_char aarp_org_code[ 3 ]; 90#endif /* NETATALK */ 91 92static u_char fddibroadcastaddr[FDDI_ADDR_LEN] = 93 { 0xff, 0xff, 0xff, 0xff, 0xff, 0xff }; 94 95static int fddi_resolvemulti(struct ifnet *, struct sockaddr **, 96 struct sockaddr *); 97static int fddi_output(struct ifnet *, struct mbuf *, struct sockaddr *, 98 struct rtentry *); 99static void fddi_input(struct ifnet *ifp, struct mbuf *m); 100 101#define IFP2AC(IFP) ((struct arpcom *)IFP) 102#define senderr(e) do { error = (e); goto bad; } while (0) 103 104/* 105 * FDDI output routine. 106 * Encapsulate a packet of type family for the local net. 107 * Use trailer local net encapsulation if enough data in first 108 * packet leaves a multiple of 512 bytes of data in remainder. 109 * Assumes that ifp is actually pointer to arpcom structure. 110 */ 111static int 112fddi_output(ifp, m, dst, rt0) 113 struct ifnet *ifp; 114 struct mbuf *m; 115 struct sockaddr *dst; 116 struct rtentry *rt0; 117{ 118 u_int16_t type; 119 int loop_copy = 0, error = 0, hdrcmplt = 0; 120 u_char esrc[FDDI_ADDR_LEN], edst[FDDI_ADDR_LEN]; 121 struct rtentry *rt; 122 struct fddi_header *fh; 123 struct arpcom *ac = IFP2AC(ifp); 124 125#ifdef MAC 126 error = mac_check_ifnet_transmit(ifp, m); 127 if (error) 128 senderr(error); 129#endif 130 131 if (ifp->if_flags & IFF_MONITOR) 132 senderr(ENETDOWN); 133 if ((ifp->if_flags & (IFF_UP|IFF_RUNNING)) != (IFF_UP|IFF_RUNNING)) 134 senderr(ENETDOWN); 135 getmicrotime(&ifp->if_lastchange); 136 137 error = rt_check(&rt, &rt0, dst); 138 if (error) 139 goto bad; 140 141 switch (dst->sa_family) { 142#ifdef INET 143 case AF_INET: { 144 if (!arpresolve(ifp, rt, m, dst, edst, rt0)) 145 return (0); /* if not yet resolved */ 146 type = htons(ETHERTYPE_IP); 147 break; 148 } 149#endif /* INET */ 150#ifdef INET6 151 case AF_INET6: 152 if (!nd6_storelladdr(ifp, rt, m, dst, (u_char *)edst)) { 153 /* Something bad happened */ 154 return (0); 155 } 156 type = htons(ETHERTYPE_IPV6); 157 break; 158#endif /* INET6 */ 159#ifdef IPX 160 case AF_IPX: 161 type = htons(ETHERTYPE_IPX); 162 bcopy((caddr_t)&(((struct sockaddr_ipx *)dst)->sipx_addr.x_host), 163 (caddr_t)edst, FDDI_ADDR_LEN); 164 break; 165#endif /* IPX */ 166#ifdef NETATALK 167 case AF_APPLETALK: { 168 struct at_ifaddr *aa; 169 if (!aarpresolve(ac, m, (struct sockaddr_at *)dst, edst)) 170 return (0); 171 /* 172 * ifaddr is the first thing in at_ifaddr 173 */ 174 if ((aa = at_ifawithnet( (struct sockaddr_at *)dst)) == 0) 175 goto bad; 176 177 /* 178 * In the phase 2 case, we need to prepend an mbuf for the llc header. 179 * Since we must preserve the value of m, which is passed to us by 180 * value, we m_copy() the first mbuf, and use it for our llc header. 181 */ 182 if (aa->aa_flags & AFA_PHASE2) { 183 struct llc llc; 184 185 M_PREPEND(m, LLC_SNAPFRAMELEN, M_TRYWAIT); 186 if (m == 0) 187 senderr(ENOBUFS); 188 llc.llc_dsap = llc.llc_ssap = LLC_SNAP_LSAP; 189 llc.llc_control = LLC_UI; 190 bcopy(at_org_code, llc.llc_snap.org_code, sizeof(at_org_code)); 191 llc.llc_snap.ether_type = htons(ETHERTYPE_AT); 192 bcopy(&llc, mtod(m, caddr_t), LLC_SNAPFRAMELEN); 193 type = 0; 194 } else { 195 type = htons(ETHERTYPE_AT); 196 } 197 break; 198 } 199#endif /* NETATALK */ 200 201 case pseudo_AF_HDRCMPLT: 202 { 203 struct ether_header *eh; 204 hdrcmplt = 1; 205 eh = (struct ether_header *)dst->sa_data; 206 bcopy((caddr_t)eh->ether_shost, (caddr_t)esrc, FDDI_ADDR_LEN); 207 /* FALLTHROUGH */ 208 } 209 210 case AF_UNSPEC: 211 { 212 struct ether_header *eh; 213 loop_copy = -1; 214 eh = (struct ether_header *)dst->sa_data; 215 bcopy((caddr_t)eh->ether_dhost, (caddr_t)edst, FDDI_ADDR_LEN); 216 if (*edst & 1) 217 m->m_flags |= (M_BCAST|M_MCAST); 218 type = eh->ether_type; 219 break; 220 } 221 222 case AF_IMPLINK: 223 { 224 fh = mtod(m, struct fddi_header *); 225 error = EPROTONOSUPPORT; 226 switch (fh->fddi_fc & (FDDIFC_C|FDDIFC_L|FDDIFC_F)) { 227 case FDDIFC_LLC_ASYNC: { 228 /* legal priorities are 0 through 7 */ 229 if ((fh->fddi_fc & FDDIFC_Z) > 7) 230 goto bad; 231 break; 232 } 233 case FDDIFC_LLC_SYNC: { 234 /* FDDIFC_Z bits reserved, must be zero */ 235 if (fh->fddi_fc & FDDIFC_Z) 236 goto bad; 237 break; 238 } 239 case FDDIFC_SMT: { 240 /* FDDIFC_Z bits must be non zero */ 241 if ((fh->fddi_fc & FDDIFC_Z) == 0) 242 goto bad; 243 break; 244 } 245 default: { 246 /* anything else is too dangerous */ 247 goto bad; 248 } 249 } 250 error = 0; 251 if (fh->fddi_dhost[0] & 1) 252 m->m_flags |= (M_BCAST|M_MCAST); 253 goto queue_it; 254 } 255 default: 256 if_printf(ifp, "can't handle af%d\n", dst->sa_family); 257 senderr(EAFNOSUPPORT); 258 } 259 260 /* 261 * Add LLC header. 262 */ 263 if (type != 0) { 264 struct llc *l; 265 M_PREPEND(m, LLC_SNAPFRAMELEN, M_DONTWAIT); 266 if (m == 0) 267 senderr(ENOBUFS); 268 l = mtod(m, struct llc *); 269 l->llc_control = LLC_UI; 270 l->llc_dsap = l->llc_ssap = LLC_SNAP_LSAP; 271 l->llc_snap.org_code[0] = 272 l->llc_snap.org_code[1] = 273 l->llc_snap.org_code[2] = 0; 274 l->llc_snap.ether_type = htons(type); 275 } 276 277 /* 278 * Add local net header. If no space in first mbuf, 279 * allocate another. 280 */ 281 M_PREPEND(m, FDDI_HDR_LEN, M_DONTWAIT); 282 if (m == 0) 283 senderr(ENOBUFS); 284 fh = mtod(m, struct fddi_header *); 285 fh->fddi_fc = FDDIFC_LLC_ASYNC|FDDIFC_LLC_PRIO4; 286 bcopy((caddr_t)edst, (caddr_t)fh->fddi_dhost, FDDI_ADDR_LEN); 287 queue_it: 288 if (hdrcmplt) 289 bcopy((caddr_t)esrc, (caddr_t)fh->fddi_shost, FDDI_ADDR_LEN); 290 else 291 bcopy((caddr_t)ac->ac_enaddr, (caddr_t)fh->fddi_shost, 292 FDDI_ADDR_LEN); 293 294 /* 295 * If a simplex interface, and the packet is being sent to our 296 * Ethernet address or a broadcast address, loopback a copy. 297 * XXX To make a simplex device behave exactly like a duplex 298 * device, we should copy in the case of sending to our own 299 * ethernet address (thus letting the original actually appear 300 * on the wire). However, we don't do that here for security 301 * reasons and compatibility with the original behavior. 302 */ 303 if ((ifp->if_flags & IFF_SIMPLEX) && (loop_copy != -1)) { 304 if ((m->m_flags & M_BCAST) || (loop_copy > 0)) { 305 struct mbuf *n; 306 n = m_copy(m, 0, (int)M_COPYALL); 307 (void) if_simloop(ifp, n, dst->sa_family, 308 FDDI_HDR_LEN); 309 } else if (bcmp(fh->fddi_dhost, fh->fddi_shost, 310 FDDI_ADDR_LEN) == 0) { 311 (void) if_simloop(ifp, m, dst->sa_family, 312 FDDI_HDR_LEN); 313 return (0); /* XXX */ 314 } 315 } 316 317 if (! IF_HANDOFF(&ifp->if_snd, m, ifp)) 318 senderr(ENOBUFS); 319 return (error); 320 321bad: 322 ifp->if_oerrors++; 323 if (m) 324 m_freem(m); 325 return (error); 326} 327 328/* 329 * Process a received FDDI packet. 330 */ 331static void 332fddi_input(ifp, m) 333 struct ifnet *ifp; 334 struct mbuf *m; 335{ 336 int isr; 337 struct llc *l; 338 struct fddi_header *fh; 339 340 /* 341 * Do consistency checks to verify assumptions 342 * made by code past this point. 343 */ 344 if ((m->m_flags & M_PKTHDR) == 0) { 345 if_printf(ifp, "discard frame w/o packet header\n"); 346 ifp->if_ierrors++; 347 m_freem(m); 348 return; 349 } 350 if (m->m_pkthdr.rcvif == NULL) { 351 if_printf(ifp, "discard frame w/o interface pointer\n"); 352 ifp->if_ierrors++; 353 m_freem(m); 354 return; 355 } 356 357 m = m_pullup(m, FDDI_HDR_LEN); 358 if (m == NULL) { 359 ifp->if_ierrors++; 360 goto dropanyway; 361 } 362 fh = mtod(m, struct fddi_header *); 363 m->m_pkthdr.header = (void *)fh; 364 365 /* 366 * Discard packet if interface is not up. 367 */ 368 if ((ifp->if_flags & (IFF_UP|IFF_RUNNING)) != (IFF_UP|IFF_RUNNING)) 369 goto dropanyway; 370 371 /* 372 * Give bpf a chance at the packet. 373 */ 374 BPF_MTAP(ifp, m); 375 376 /* 377 * Interface marked for monitoring; discard packet. 378 */ 379 if (ifp->if_flags & IFF_MONITOR) { 380 m_freem(m); 381 return; 382 } 383 384#ifdef MAC 385 mac_create_mbuf_from_ifnet(ifp, m); 386#endif 387 388 /* 389 * Update interface statistics. 390 */ 391 ifp->if_ibytes += m->m_pkthdr.len; 392 getmicrotime(&ifp->if_lastchange); 393 394 /* 395 * Discard non local unicast packets when interface 396 * is in promiscuous mode. 397 */ 398 if ((ifp->if_flags & IFF_PROMISC) && ((fh->fddi_dhost[0] & 1) == 0) && 399 (bcmp(IFP2AC(ifp)->ac_enaddr, (caddr_t)fh->fddi_dhost, 400 FDDI_ADDR_LEN) != 0)) 401 goto dropanyway; 402 403 /* 404 * Set mbuf flags for bcast/mcast. 405 */ 406 if (fh->fddi_dhost[0] & 1) { 407 if (bcmp(ifp->if_broadcastaddr, fh->fddi_dhost, 408 FDDI_ADDR_LEN) == 0) 409 m->m_flags |= M_BCAST; 410 else 411 m->m_flags |= M_MCAST; 412 ifp->if_imcasts++; 413 } 414 415#ifdef M_LINK0 416 /* 417 * If this has a LLC priority of 0, then mark it so upper 418 * layers have a hint that it really came via a FDDI/Ethernet 419 * bridge. 420 */ 421 if ((fh->fddi_fc & FDDIFC_LLC_PRIO7) == FDDIFC_LLC_PRIO0) 422 m->m_flags |= M_LINK0; 423#endif 424 425 /* Strip off FDDI header. */ 426 m_adj(m, FDDI_HDR_LEN); 427 428 m = m_pullup(m, LLC_SNAPFRAMELEN); 429 if (m == 0) { 430 ifp->if_ierrors++; 431 goto dropanyway; 432 } 433 l = mtod(m, struct llc *); 434 435 switch (l->llc_dsap) { 436 case LLC_SNAP_LSAP: 437 { 438 u_int16_t type; 439 if ((l->llc_control != LLC_UI) || 440 (l->llc_ssap != LLC_SNAP_LSAP)) { 441 ifp->if_noproto++; 442 goto dropanyway; 443 } 444#ifdef NETATALK 445 if (Bcmp(&(l->llc_snap.org_code)[0], at_org_code, 446 sizeof(at_org_code)) == 0 && 447 ntohs(l->llc_snap.ether_type) == ETHERTYPE_AT) { 448 isr = NETISR_ATALK2; 449 m_adj(m, LLC_SNAPFRAMELEN); 450 break; 451 } 452 453 if (Bcmp(&(l->llc_snap.org_code)[0], aarp_org_code, 454 sizeof(aarp_org_code)) == 0 && 455 ntohs(l->llc_snap.ether_type) == ETHERTYPE_AARP) { 456 m_adj(m, LLC_SNAPFRAMELEN); 457 isr = NETISR_AARP; 458 break; 459 } 460#endif /* NETATALK */ 461 if (l->llc_snap.org_code[0] != 0 || 462 l->llc_snap.org_code[1] != 0 || 463 l->llc_snap.org_code[2] != 0) { 464 ifp->if_noproto++; 465 goto dropanyway; 466 } 467 468 type = ntohs(l->llc_snap.ether_type); 469 m_adj(m, LLC_SNAPFRAMELEN); 470 471 switch (type) { 472#ifdef INET 473 case ETHERTYPE_IP: 474 if (ipflow_fastforward(m)) 475 return; 476 isr = NETISR_IP; 477 break; 478 479 case ETHERTYPE_ARP: 480 if (ifp->if_flags & IFF_NOARP) 481 goto dropanyway; 482 isr = NETISR_ARP; 483 break; 484#endif 485#ifdef INET6 486 case ETHERTYPE_IPV6: 487 isr = NETISR_IPV6; 488 break; 489#endif 490#ifdef IPX 491 case ETHERTYPE_IPX: 492 isr = NETISR_IPX; 493 break; 494#endif 495#ifdef DECNET 496 case ETHERTYPE_DECNET: 497 isr = NETISR_DECNET; 498 break; 499#endif 500#ifdef NETATALK 501 case ETHERTYPE_AT: 502 isr = NETISR_ATALK1; 503 break; 504 case ETHERTYPE_AARP: 505 isr = NETISR_AARP; 506 break; 507#endif /* NETATALK */ 508 default: 509 /* printf("fddi_input: unknown protocol 0x%x\n", type); */ 510 ifp->if_noproto++; 511 goto dropanyway; 512 } 513 break; 514 } 515 516 default: 517 /* printf("fddi_input: unknown dsap 0x%x\n", l->llc_dsap); */ 518 ifp->if_noproto++; 519 goto dropanyway; 520 } 521 netisr_dispatch(isr, m); 522 return; 523 524dropanyway: 525 ifp->if_iqdrops++; 526 if (m) 527 m_freem(m); 528 return; 529} 530 531/* 532 * Perform common duties while attaching to interface list 533 */ 534void 535fddi_ifattach(ifp, bpf) 536 struct ifnet *ifp; 537 int bpf; 538{ 539 struct ifaddr *ifa; 540 struct sockaddr_dl *sdl; 541 542 ifp->if_type = IFT_FDDI; 543 ifp->if_addrlen = FDDI_ADDR_LEN; 544 ifp->if_hdrlen = 21; 545 546 if_attach(ifp); /* Must be called before additional assignments */ 547 548 ifp->if_mtu = FDDIMTU; 549 ifp->if_output = fddi_output; 550 ifp->if_input = fddi_input; 551 ifp->if_resolvemulti = fddi_resolvemulti; 552 ifp->if_broadcastaddr = fddibroadcastaddr; 553 ifp->if_baudrate = 100000000; 554#ifdef IFF_NOTRAILERS 555 ifp->if_flags |= IFF_NOTRAILERS; 556#endif 557 ifa = ifaddr_byindex(ifp->if_index); 558 if (ifa == NULL) { 559 if_printf(ifp, "%s() no lladdr!\n", __func__); 560 return; 561 } 562 563 sdl = (struct sockaddr_dl *)ifa->ifa_addr; 564 sdl->sdl_type = IFT_FDDI; 565 sdl->sdl_alen = ifp->if_addrlen; 566 bcopy(IFP2AC(ifp)->ac_enaddr, LLADDR(sdl), ifp->if_addrlen); 567 568 if (bpf) 569 bpfattach(ifp, DLT_FDDI, FDDI_HDR_LEN); 570 571 return; 572} 573 574void 575fddi_ifdetach(ifp, bpf) 576 struct ifnet *ifp; 577 int bpf; 578{ 579 580 if (bpf) 581 bpfdetach(ifp); 582 583 if_detach(ifp); 584 585 return; 586} 587 588int 589fddi_ioctl (ifp, command, data) 590 struct ifnet *ifp; 591 int command; 592 caddr_t data; 593{ 594 struct ifaddr *ifa; 595 struct ifreq *ifr; 596 int error; 597 598 ifa = (struct ifaddr *) data; 599 ifr = (struct ifreq *) data; 600 error = 0; 601 602 switch (command) { 603 case SIOCSIFADDR: 604 ifp->if_flags |= IFF_UP; 605 606 switch (ifa->ifa_addr->sa_family) { 607#ifdef INET 608 case AF_INET: /* before arpwhohas */ 609 ifp->if_init(ifp->if_softc); 610 arp_ifinit(ifp, ifa); 611 break; 612#endif 613#ifdef IPX 614 /* 615 * XXX - This code is probably wrong 616 */ 617 case AF_IPX: { 618 struct ipx_addr *ina; 619 struct arpcom *ac; 620 621 ina = &(IA_SIPX(ifa)->sipx_addr); 622 ac = IFP2AC(ifp); 623 624 if (ipx_nullhost(*ina)) { 625 ina->x_host = *(union ipx_host *) 626 ac->ac_enaddr; 627 } else { 628 bcopy((caddr_t) ina->x_host.c_host, 629 (caddr_t) ac->ac_enaddr, 630 sizeof(ac->ac_enaddr)); 631 } 632 633 /* 634 * Set new address 635 */ 636 ifp->if_init(ifp->if_softc); 637 } 638 break; 639#endif 640 default: 641 ifp->if_init(ifp->if_softc); 642 break; 643 } 644 case SIOCGIFADDR: { 645 struct sockaddr *sa; 646 647 sa = (struct sockaddr *) & ifr->ifr_data; 648 bcopy(IFP2AC(ifp)->ac_enaddr, 649 (caddr_t) sa->sa_data, FDDI_ADDR_LEN); 650 651 } 652 break; 653 case SIOCSIFMTU: 654 /* 655 * Set the interface MTU. 656 */ 657 if (ifr->ifr_mtu > FDDIMTU) { 658 error = EINVAL; 659 } else { 660 ifp->if_mtu = ifr->ifr_mtu; 661 } 662 break; 663 default: 664 break; 665 } 666 667 return (error); 668} 669 670static int 671fddi_resolvemulti(ifp, llsa, sa) 672 struct ifnet *ifp; 673 struct sockaddr **llsa; 674 struct sockaddr *sa; 675{ 676 struct sockaddr_dl *sdl; 677 struct sockaddr_in *sin; 678#ifdef INET6 679 struct sockaddr_in6 *sin6; 680#endif 681 u_char *e_addr; 682 683 switch(sa->sa_family) { 684 case AF_LINK: 685 /* 686 * No mapping needed. Just check that it's a valid MC address. 687 */ 688 sdl = (struct sockaddr_dl *)sa; 689 e_addr = LLADDR(sdl); 690 if ((e_addr[0] & 1) != 1) 691 return (EADDRNOTAVAIL); 692 *llsa = 0; 693 return (0); 694 695#ifdef INET 696 case AF_INET: 697 sin = (struct sockaddr_in *)sa; 698 if (!IN_MULTICAST(ntohl(sin->sin_addr.s_addr))) 699 return (EADDRNOTAVAIL); 700 MALLOC(sdl, struct sockaddr_dl *, sizeof *sdl, M_IFMADDR, 701 M_WAITOK); 702 sdl->sdl_len = sizeof *sdl; 703 sdl->sdl_family = AF_LINK; 704 sdl->sdl_index = ifp->if_index; 705 sdl->sdl_type = IFT_FDDI; 706 sdl->sdl_nlen = 0; 707 sdl->sdl_alen = FDDI_ADDR_LEN; 708 sdl->sdl_slen = 0; 709 e_addr = LLADDR(sdl); 710 ETHER_MAP_IP_MULTICAST(&sin->sin_addr, e_addr); 711 *llsa = (struct sockaddr *)sdl; 712 return (0); 713#endif 714#ifdef INET6 715 case AF_INET6: 716 sin6 = (struct sockaddr_in6 *)sa; 717 if (IN6_IS_ADDR_UNSPECIFIED(&sin6->sin6_addr)) { 718 /* 719 * An IP6 address of 0 means listen to all 720 * of the Ethernet multicast address used for IP6. 721 * (This is used for multicast routers.) 722 */ 723 ifp->if_flags |= IFF_ALLMULTI; 724 *llsa = 0; 725 return (0); 726 } 727 if (!IN6_IS_ADDR_MULTICAST(&sin6->sin6_addr)) 728 return (EADDRNOTAVAIL); 729 MALLOC(sdl, struct sockaddr_dl *, sizeof *sdl, M_IFMADDR, 730 M_WAITOK); 731 sdl->sdl_len = sizeof *sdl; 732 sdl->sdl_family = AF_LINK; 733 sdl->sdl_index = ifp->if_index; 734 sdl->sdl_type = IFT_FDDI; 735 sdl->sdl_nlen = 0; 736 sdl->sdl_alen = FDDI_ADDR_LEN; 737 sdl->sdl_slen = 0; 738 e_addr = LLADDR(sdl); 739 ETHER_MAP_IPV6_MULTICAST(&sin6->sin6_addr, e_addr); 740 *llsa = (struct sockaddr *)sdl; 741 return (0); 742#endif 743 744 default: 745 /* 746 * Well, the text isn't quite right, but it's the name 747 * that counts... 748 */ 749 return (EAFNOSUPPORT); 750 } 751 752 return (0); 753} 754 755static moduledata_t fddi_mod = { 756 "fddi", /* module name */ 757 NULL, /* event handler */ 758 0 /* extra data */ 759}; 760 761DECLARE_MODULE(fddi, fddi_mod, SI_SUB_PSEUDO, SI_ORDER_ANY); 762MODULE_VERSION(fddi, 1); 763