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: stable/10/sys/net/if_fddisubr.c 332160 2018-04-07 00:04:28Z brooks $ 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/kernel.h> 47#include <sys/malloc.h> 48#include <sys/mbuf.h> 49#include <sys/module.h> 50#include <sys/socket.h> 51#include <sys/sockio.h> 52 53#include <net/if.h> 54#include <net/if_dl.h> 55#include <net/if_llc.h> 56#include <net/if_types.h> 57#include <net/if_llatbl.h> 58 59#include <net/ethernet.h> 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 92#include <security/mac/mac_framework.h> 93 94static const u_char fddibroadcastaddr[FDDI_ADDR_LEN] = 95 { 0xff, 0xff, 0xff, 0xff, 0xff, 0xff }; 96 97static int fddi_resolvemulti(struct ifnet *, struct sockaddr **, 98 struct sockaddr *); 99static int fddi_output(struct ifnet *, struct mbuf *, const struct sockaddr *, 100 struct route *); 101static void fddi_input(struct ifnet *ifp, struct mbuf *m); 102 103#define senderr(e) do { error = (e); goto bad; } while (0) 104 105/* 106 * FDDI output routine. 107 * Encapsulate a packet of type family for the local net. 108 * Use trailer local net encapsulation if enough data in first 109 * packet leaves a multiple of 512 bytes of data in remainder. 110 * Assumes that ifp is actually pointer to arpcom structure. 111 */ 112static int 113fddi_output(struct ifnet *ifp, struct mbuf *m, const struct sockaddr *dst, 114 struct route *ro) 115{ 116 u_int16_t type; 117 int loop_copy = 0, error = 0, hdrcmplt = 0; 118 u_char esrc[FDDI_ADDR_LEN], edst[FDDI_ADDR_LEN]; 119 struct fddi_header *fh; 120#if defined(INET) || defined(INET6) 121 struct llentry *lle; 122#endif 123 124#ifdef MAC 125 error = mac_ifnet_check_transmit(ifp, m); 126 if (error) 127 senderr(error); 128#endif 129 130 if (ifp->if_flags & IFF_MONITOR) 131 senderr(ENETDOWN); 132 if (!((ifp->if_flags & IFF_UP) && 133 (ifp->if_drv_flags & IFF_DRV_RUNNING))) 134 senderr(ENETDOWN); 135 getmicrotime(&ifp->if_lastchange); 136 137 switch (dst->sa_family) { 138#ifdef INET 139 case AF_INET: { 140 struct rtentry *rt0 = NULL; 141 142 if (ro != NULL) 143 rt0 = ro->ro_rt; 144 error = arpresolve(ifp, rt0, m, dst, edst, &lle); 145 if (error) 146 return (error == EWOULDBLOCK ? 0 : error); 147 type = htons(ETHERTYPE_IP); 148 break; 149 } 150 case AF_ARP: 151 { 152 struct arphdr *ah; 153 ah = mtod(m, struct arphdr *); 154 ah->ar_hrd = htons(ARPHRD_ETHER); 155 156 loop_copy = -1; /* if this is for us, don't do it */ 157 158 switch (ntohs(ah->ar_op)) { 159 case ARPOP_REVREQUEST: 160 case ARPOP_REVREPLY: 161 type = htons(ETHERTYPE_REVARP); 162 break; 163 case ARPOP_REQUEST: 164 case ARPOP_REPLY: 165 default: 166 type = htons(ETHERTYPE_ARP); 167 break; 168 } 169 170 if (m->m_flags & M_BCAST) 171 bcopy(ifp->if_broadcastaddr, edst, FDDI_ADDR_LEN); 172 else 173 bcopy(ar_tha(ah), edst, FDDI_ADDR_LEN); 174 175 } 176 break; 177#endif /* INET */ 178#ifdef INET6 179 case AF_INET6: 180 error = nd6_storelladdr(ifp, m, dst, (u_char *)edst, &lle); 181 if (error) 182 return (error); /* Something bad happened */ 183 type = htons(ETHERTYPE_IPV6); 184 break; 185#endif /* INET6 */ 186#ifdef IPX 187 case AF_IPX: 188 type = htons(ETHERTYPE_IPX); 189 bcopy(&((const struct sockaddr_ipx *)dst)->sipx_addr.x_host, 190 edst, FDDI_ADDR_LEN); 191 break; 192#endif /* IPX */ 193#ifdef NETATALK 194 case AF_APPLETALK: { 195 struct at_ifaddr *aa; 196 if (!aarpresolve(ifp, m, (const struct sockaddr_at *)dst, edst)) 197 return (0); 198 /* 199 * ifaddr is the first thing in at_ifaddr 200 */ 201 if ((aa = at_ifawithnet((const struct sockaddr_at *)dst)) == 0) 202 goto bad; 203 204 /* 205 * In the phase 2 case, we need to prepend an mbuf for the llc header. 206 * Since we must preserve the value of m, which is passed to us by 207 * value, we m_copy() the first mbuf, and use it for our llc header. 208 */ 209 if (aa->aa_flags & AFA_PHASE2) { 210 struct llc llc; 211 212 M_PREPEND(m, LLC_SNAPFRAMELEN, M_WAITOK); 213 llc.llc_dsap = llc.llc_ssap = LLC_SNAP_LSAP; 214 llc.llc_control = LLC_UI; 215 bcopy(at_org_code, llc.llc_snap.org_code, sizeof(at_org_code)); 216 llc.llc_snap.ether_type = htons(ETHERTYPE_AT); 217 bcopy(&llc, mtod(m, caddr_t), LLC_SNAPFRAMELEN); 218 type = 0; 219 } else { 220 type = htons(ETHERTYPE_AT); 221 } 222 ifa_free(&aa->aa_ifa); 223 break; 224 } 225#endif /* NETATALK */ 226 227 case pseudo_AF_HDRCMPLT: 228 { 229 const struct ether_header *eh; 230 231 hdrcmplt = 1; 232 eh = (const struct ether_header *)dst->sa_data; 233 bcopy(eh->ether_shost, esrc, FDDI_ADDR_LEN); 234 /* FALLTHROUGH */ 235 } 236 237 case AF_UNSPEC: 238 { 239 const struct ether_header *eh; 240 241 loop_copy = -1; 242 eh = (const struct ether_header *)dst->sa_data; 243 bcopy(eh->ether_dhost, edst, FDDI_ADDR_LEN); 244 if (*edst & 1) 245 m->m_flags |= (M_BCAST|M_MCAST); 246 type = eh->ether_type; 247 break; 248 } 249 250 case AF_IMPLINK: 251 { 252 fh = mtod(m, struct fddi_header *); 253 error = EPROTONOSUPPORT; 254 switch (fh->fddi_fc & (FDDIFC_C|FDDIFC_L|FDDIFC_F)) { 255 case FDDIFC_LLC_ASYNC: { 256 /* legal priorities are 0 through 7 */ 257 if ((fh->fddi_fc & FDDIFC_Z) > 7) 258 goto bad; 259 break; 260 } 261 case FDDIFC_LLC_SYNC: { 262 /* FDDIFC_Z bits reserved, must be zero */ 263 if (fh->fddi_fc & FDDIFC_Z) 264 goto bad; 265 break; 266 } 267 case FDDIFC_SMT: { 268 /* FDDIFC_Z bits must be non zero */ 269 if ((fh->fddi_fc & FDDIFC_Z) == 0) 270 goto bad; 271 break; 272 } 273 default: { 274 /* anything else is too dangerous */ 275 goto bad; 276 } 277 } 278 error = 0; 279 if (fh->fddi_dhost[0] & 1) 280 m->m_flags |= (M_BCAST|M_MCAST); 281 goto queue_it; 282 } 283 default: 284 if_printf(ifp, "can't handle af%d\n", dst->sa_family); 285 senderr(EAFNOSUPPORT); 286 } 287 288 /* 289 * Add LLC header. 290 */ 291 if (type != 0) { 292 struct llc *l; 293 M_PREPEND(m, LLC_SNAPFRAMELEN, M_NOWAIT); 294 if (m == 0) 295 senderr(ENOBUFS); 296 l = mtod(m, struct llc *); 297 l->llc_control = LLC_UI; 298 l->llc_dsap = l->llc_ssap = LLC_SNAP_LSAP; 299 l->llc_snap.org_code[0] = 300 l->llc_snap.org_code[1] = 301 l->llc_snap.org_code[2] = 0; 302 l->llc_snap.ether_type = htons(type); 303 } 304 305 /* 306 * Add local net header. If no space in first mbuf, 307 * allocate another. 308 */ 309 M_PREPEND(m, FDDI_HDR_LEN, M_NOWAIT); 310 if (m == 0) 311 senderr(ENOBUFS); 312 fh = mtod(m, struct fddi_header *); 313 fh->fddi_fc = FDDIFC_LLC_ASYNC|FDDIFC_LLC_PRIO4; 314 bcopy((caddr_t)edst, (caddr_t)fh->fddi_dhost, FDDI_ADDR_LEN); 315 queue_it: 316 if (hdrcmplt) 317 bcopy((caddr_t)esrc, (caddr_t)fh->fddi_shost, FDDI_ADDR_LEN); 318 else 319 bcopy(IF_LLADDR(ifp), (caddr_t)fh->fddi_shost, 320 FDDI_ADDR_LEN); 321 322 /* 323 * If a simplex interface, and the packet is being sent to our 324 * Ethernet address or a broadcast address, loopback a copy. 325 * XXX To make a simplex device behave exactly like a duplex 326 * device, we should copy in the case of sending to our own 327 * ethernet address (thus letting the original actually appear 328 * on the wire). However, we don't do that here for security 329 * reasons and compatibility with the original behavior. 330 */ 331 if ((ifp->if_flags & IFF_SIMPLEX) && (loop_copy != -1)) { 332 if ((m->m_flags & M_BCAST) || (loop_copy > 0)) { 333 struct mbuf *n; 334 n = m_copy(m, 0, (int)M_COPYALL); 335 (void) if_simloop(ifp, n, dst->sa_family, 336 FDDI_HDR_LEN); 337 } else if (bcmp(fh->fddi_dhost, fh->fddi_shost, 338 FDDI_ADDR_LEN) == 0) { 339 (void) if_simloop(ifp, m, dst->sa_family, 340 FDDI_HDR_LEN); 341 return (0); /* XXX */ 342 } 343 } 344 345 error = (ifp->if_transmit)(ifp, m); 346 if (error) 347 ifp->if_oerrors++; 348 349 return (error); 350 351bad: 352 ifp->if_oerrors++; 353 if (m) 354 m_freem(m); 355 return (error); 356} 357 358/* 359 * Process a received FDDI packet. 360 */ 361static void 362fddi_input(ifp, m) 363 struct ifnet *ifp; 364 struct mbuf *m; 365{ 366 int isr; 367 struct llc *l; 368 struct fddi_header *fh; 369 370 /* 371 * Do consistency checks to verify assumptions 372 * made by code past this point. 373 */ 374 if ((m->m_flags & M_PKTHDR) == 0) { 375 if_printf(ifp, "discard frame w/o packet header\n"); 376 ifp->if_ierrors++; 377 m_freem(m); 378 return; 379 } 380 if (m->m_pkthdr.rcvif == NULL) { 381 if_printf(ifp, "discard frame w/o interface pointer\n"); 382 ifp->if_ierrors++; 383 m_freem(m); 384 return; 385 } 386 387 m = m_pullup(m, FDDI_HDR_LEN); 388 if (m == NULL) { 389 ifp->if_ierrors++; 390 goto dropanyway; 391 } 392 fh = mtod(m, struct fddi_header *); 393 394 /* 395 * Discard packet if interface is not up. 396 */ 397 if (!((ifp->if_flags & IFF_UP) && 398 (ifp->if_drv_flags & IFF_DRV_RUNNING))) 399 goto dropanyway; 400 401 /* 402 * Give bpf a chance at the packet. 403 */ 404 BPF_MTAP(ifp, m); 405 406 /* 407 * Interface marked for monitoring; discard packet. 408 */ 409 if (ifp->if_flags & IFF_MONITOR) { 410 m_freem(m); 411 return; 412 } 413 414#ifdef MAC 415 mac_ifnet_create_mbuf(ifp, m); 416#endif 417 418 /* 419 * Update interface statistics. 420 */ 421 ifp->if_ibytes += m->m_pkthdr.len; 422 getmicrotime(&ifp->if_lastchange); 423 424 /* 425 * Discard non local unicast packets when interface 426 * is in promiscuous mode. 427 */ 428 if ((ifp->if_flags & IFF_PROMISC) && ((fh->fddi_dhost[0] & 1) == 0) && 429 (bcmp(IF_LLADDR(ifp), (caddr_t)fh->fddi_dhost, 430 FDDI_ADDR_LEN) != 0)) 431 goto dropanyway; 432 433 /* 434 * Set mbuf flags for bcast/mcast. 435 */ 436 if (fh->fddi_dhost[0] & 1) { 437 if (bcmp(ifp->if_broadcastaddr, fh->fddi_dhost, 438 FDDI_ADDR_LEN) == 0) 439 m->m_flags |= M_BCAST; 440 else 441 m->m_flags |= M_MCAST; 442 ifp->if_imcasts++; 443 } 444 445#ifdef M_LINK0 446 /* 447 * If this has a LLC priority of 0, then mark it so upper 448 * layers have a hint that it really came via a FDDI/Ethernet 449 * bridge. 450 */ 451 if ((fh->fddi_fc & FDDIFC_LLC_PRIO7) == FDDIFC_LLC_PRIO0) 452 m->m_flags |= M_LINK0; 453#endif 454 455 /* Strip off FDDI header. */ 456 m_adj(m, FDDI_HDR_LEN); 457 458 m = m_pullup(m, LLC_SNAPFRAMELEN); 459 if (m == 0) { 460 ifp->if_ierrors++; 461 goto dropanyway; 462 } 463 l = mtod(m, struct llc *); 464 465 switch (l->llc_dsap) { 466 case LLC_SNAP_LSAP: 467 { 468 u_int16_t type; 469 if ((l->llc_control != LLC_UI) || 470 (l->llc_ssap != LLC_SNAP_LSAP)) { 471 ifp->if_noproto++; 472 goto dropanyway; 473 } 474#ifdef NETATALK 475 if (bcmp(&(l->llc_snap.org_code)[0], at_org_code, 476 sizeof(at_org_code)) == 0 && 477 ntohs(l->llc_snap.ether_type) == ETHERTYPE_AT) { 478 isr = NETISR_ATALK2; 479 m_adj(m, LLC_SNAPFRAMELEN); 480 break; 481 } 482 483 if (bcmp(&(l->llc_snap.org_code)[0], aarp_org_code, 484 sizeof(aarp_org_code)) == 0 && 485 ntohs(l->llc_snap.ether_type) == ETHERTYPE_AARP) { 486 m_adj(m, LLC_SNAPFRAMELEN); 487 isr = NETISR_AARP; 488 break; 489 } 490#endif /* NETATALK */ 491 if (l->llc_snap.org_code[0] != 0 || 492 l->llc_snap.org_code[1] != 0 || 493 l->llc_snap.org_code[2] != 0) { 494 ifp->if_noproto++; 495 goto dropanyway; 496 } 497 498 type = ntohs(l->llc_snap.ether_type); 499 m_adj(m, LLC_SNAPFRAMELEN); 500 501 switch (type) { 502#ifdef INET 503 case ETHERTYPE_IP: 504 if ((m = ip_fastforward(m)) == NULL) 505 return; 506 isr = NETISR_IP; 507 break; 508 509 case ETHERTYPE_ARP: 510 if (ifp->if_flags & IFF_NOARP) 511 goto dropanyway; 512 isr = NETISR_ARP; 513 break; 514#endif 515#ifdef INET6 516 case ETHERTYPE_IPV6: 517 isr = NETISR_IPV6; 518 break; 519#endif 520#ifdef IPX 521 case ETHERTYPE_IPX: 522 isr = NETISR_IPX; 523 break; 524#endif 525#ifdef DECNET 526 case ETHERTYPE_DECNET: 527 isr = NETISR_DECNET; 528 break; 529#endif 530#ifdef NETATALK 531 case ETHERTYPE_AT: 532 isr = NETISR_ATALK1; 533 break; 534 case ETHERTYPE_AARP: 535 isr = NETISR_AARP; 536 break; 537#endif /* NETATALK */ 538 default: 539 /* printf("fddi_input: unknown protocol 0x%x\n", type); */ 540 ifp->if_noproto++; 541 goto dropanyway; 542 } 543 break; 544 } 545 546 default: 547 /* printf("fddi_input: unknown dsap 0x%x\n", l->llc_dsap); */ 548 ifp->if_noproto++; 549 goto dropanyway; 550 } 551 M_SETFIB(m, ifp->if_fib); 552 netisr_dispatch(isr, m); 553 return; 554 555dropanyway: 556 ifp->if_iqdrops++; 557 if (m) 558 m_freem(m); 559 return; 560} 561 562/* 563 * Perform common duties while attaching to interface list 564 */ 565void 566fddi_ifattach(ifp, lla, bpf) 567 struct ifnet *ifp; 568 const u_int8_t *lla; 569 int bpf; 570{ 571 struct ifaddr *ifa; 572 struct sockaddr_dl *sdl; 573 574 ifp->if_type = IFT_FDDI; 575 ifp->if_addrlen = FDDI_ADDR_LEN; 576 ifp->if_hdrlen = 21; 577 578 if_attach(ifp); /* Must be called before additional assignments */ 579 580 ifp->if_mtu = FDDIMTU; 581 ifp->if_output = fddi_output; 582 ifp->if_input = fddi_input; 583 ifp->if_resolvemulti = fddi_resolvemulti; 584 ifp->if_broadcastaddr = fddibroadcastaddr; 585 ifp->if_baudrate = 100000000; 586#ifdef IFF_NOTRAILERS 587 ifp->if_flags |= IFF_NOTRAILERS; 588#endif 589 ifa = ifp->if_addr; 590 KASSERT(ifa != NULL, ("%s: no lladdr!\n", __func__)); 591 592 sdl = (struct sockaddr_dl *)ifa->ifa_addr; 593 sdl->sdl_type = IFT_FDDI; 594 sdl->sdl_alen = ifp->if_addrlen; 595 bcopy(lla, LLADDR(sdl), ifp->if_addrlen); 596 597 if (bpf) 598 bpfattach(ifp, DLT_FDDI, FDDI_HDR_LEN); 599 600 return; 601} 602 603void 604fddi_ifdetach(ifp, bpf) 605 struct ifnet *ifp; 606 int bpf; 607{ 608 609 if (bpf) 610 bpfdetach(ifp); 611 612 if_detach(ifp); 613 614 return; 615} 616 617int 618fddi_ioctl (ifp, command, data) 619 struct ifnet *ifp; 620 u_long command; 621 caddr_t data; 622{ 623 struct ifaddr *ifa; 624 struct ifreq *ifr; 625 int error; 626 627 ifa = (struct ifaddr *) data; 628 ifr = (struct ifreq *) data; 629 error = 0; 630 631 switch (command) { 632 case SIOCSIFADDR: 633 ifp->if_flags |= IFF_UP; 634 635 switch (ifa->ifa_addr->sa_family) { 636#ifdef INET 637 case AF_INET: /* before arpwhohas */ 638 ifp->if_init(ifp->if_softc); 639 arp_ifinit(ifp, ifa); 640 break; 641#endif 642#ifdef IPX 643 /* 644 * XXX - This code is probably wrong 645 */ 646 case AF_IPX: { 647 struct ipx_addr *ina; 648 649 ina = &(IA_SIPX(ifa)->sipx_addr); 650 651 if (ipx_nullhost(*ina)) { 652 ina->x_host = *(union ipx_host *) 653 IF_LLADDR(ifp); 654 } else { 655 bcopy((caddr_t) ina->x_host.c_host, 656 (caddr_t) IF_LLADDR(ifp), 657 ETHER_ADDR_LEN); 658 } 659 660 /* 661 * Set new address 662 */ 663 ifp->if_init(ifp->if_softc); 664 } 665 break; 666#endif 667 default: 668 ifp->if_init(ifp->if_softc); 669 break; 670 } 671 break; 672 case SIOCGIFADDR: 673 bcopy(IF_LLADDR(ifp), &ifr->ifr_addr.sa_data[0], 674 FDDI_ADDR_LEN); 675 break; 676 case SIOCSIFMTU: 677 /* 678 * Set the interface MTU. 679 */ 680 if (ifr->ifr_mtu > FDDIMTU) { 681 error = EINVAL; 682 } else { 683 ifp->if_mtu = ifr->ifr_mtu; 684 } 685 break; 686 default: 687 error = EINVAL; 688 break; 689 } 690 691 return (error); 692} 693 694static int 695fddi_resolvemulti(ifp, llsa, sa) 696 struct ifnet *ifp; 697 struct sockaddr **llsa; 698 struct sockaddr *sa; 699{ 700 struct sockaddr_dl *sdl; 701#ifdef INET 702 struct sockaddr_in *sin; 703#endif 704#ifdef INET6 705 struct sockaddr_in6 *sin6; 706#endif 707 u_char *e_addr; 708 709 switch(sa->sa_family) { 710 case AF_LINK: 711 /* 712 * No mapping needed. Just check that it's a valid MC address. 713 */ 714 sdl = (struct sockaddr_dl *)sa; 715 e_addr = LLADDR(sdl); 716 if ((e_addr[0] & 1) != 1) 717 return (EADDRNOTAVAIL); 718 *llsa = 0; 719 return (0); 720 721#ifdef INET 722 case AF_INET: 723 sin = (struct sockaddr_in *)sa; 724 if (!IN_MULTICAST(ntohl(sin->sin_addr.s_addr))) 725 return (EADDRNOTAVAIL); 726 sdl = malloc(sizeof *sdl, M_IFMADDR, 727 M_NOWAIT | M_ZERO); 728 if (sdl == NULL) 729 return (ENOMEM); 730 sdl->sdl_len = sizeof *sdl; 731 sdl->sdl_family = AF_LINK; 732 sdl->sdl_index = ifp->if_index; 733 sdl->sdl_type = IFT_FDDI; 734 sdl->sdl_nlen = 0; 735 sdl->sdl_alen = FDDI_ADDR_LEN; 736 sdl->sdl_slen = 0; 737 e_addr = LLADDR(sdl); 738 ETHER_MAP_IP_MULTICAST(&sin->sin_addr, e_addr); 739 *llsa = (struct sockaddr *)sdl; 740 return (0); 741#endif 742#ifdef INET6 743 case AF_INET6: 744 sin6 = (struct sockaddr_in6 *)sa; 745 if (IN6_IS_ADDR_UNSPECIFIED(&sin6->sin6_addr)) { 746 /* 747 * An IP6 address of 0 means listen to all 748 * of the Ethernet multicast address used for IP6. 749 * (This is used for multicast routers.) 750 */ 751 ifp->if_flags |= IFF_ALLMULTI; 752 *llsa = 0; 753 return (0); 754 } 755 if (!IN6_IS_ADDR_MULTICAST(&sin6->sin6_addr)) 756 return (EADDRNOTAVAIL); 757 sdl = malloc(sizeof *sdl, M_IFMADDR, 758 M_NOWAIT | M_ZERO); 759 if (sdl == NULL) 760 return (ENOMEM); 761 sdl->sdl_len = sizeof *sdl; 762 sdl->sdl_family = AF_LINK; 763 sdl->sdl_index = ifp->if_index; 764 sdl->sdl_type = IFT_FDDI; 765 sdl->sdl_nlen = 0; 766 sdl->sdl_alen = FDDI_ADDR_LEN; 767 sdl->sdl_slen = 0; 768 e_addr = LLADDR(sdl); 769 ETHER_MAP_IPV6_MULTICAST(&sin6->sin6_addr, e_addr); 770 *llsa = (struct sockaddr *)sdl; 771 return (0); 772#endif 773 774 default: 775 /* 776 * Well, the text isn't quite right, but it's the name 777 * that counts... 778 */ 779 return (EAFNOSUPPORT); 780 } 781 782 return (0); 783} 784 785static moduledata_t fddi_mod = { 786 "fddi", /* module name */ 787 NULL, /* event handler */ 788 0 /* extra data */ 789}; 790 791DECLARE_MODULE(fddi, fddi_mod, SI_SUB_PSEUDO, SI_ORDER_ANY); 792MODULE_VERSION(fddi, 1); 793