if_fddisubr.c revision 163606
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 163606 2006-10-22 11:52:19Z rwatson $ 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/malloc.h> 49#include <sys/mbuf.h> 50#include <sys/module.h> 51#include <sys/socket.h> 52#include <sys/sockio.h> 53 54#include <net/if.h> 55#include <net/if_dl.h> 56#include <net/if_llc.h> 57#include <net/if_types.h> 58 59#include <net/netisr.h> 60#include <net/route.h> 61#include <net/bpf.h> 62#include <net/fddi.h> 63 64#if defined(INET) || defined(INET6) 65#include <netinet/in.h> 66#include <netinet/in_var.h> 67#include <netinet/if_ether.h> 68#endif 69#ifdef INET6 70#include <netinet6/nd6.h> 71#endif 72 73#ifdef IPX 74#include <netipx/ipx.h> 75#include <netipx/ipx_if.h> 76#endif 77 78#ifdef DECNET 79#include <netdnet/dn.h> 80#endif 81 82#ifdef NETATALK 83#include <netatalk/at.h> 84#include <netatalk/at_var.h> 85#include <netatalk/at_extern.h> 86 87extern u_char at_org_code[ 3 ]; 88extern u_char aarp_org_code[ 3 ]; 89#endif /* NETATALK */ 90 91#include <security/mac/mac_framework.h> 92 93static const u_char fddibroadcastaddr[FDDI_ADDR_LEN] = 94 { 0xff, 0xff, 0xff, 0xff, 0xff, 0xff }; 95 96static int fddi_resolvemulti(struct ifnet *, struct sockaddr **, 97 struct sockaddr *); 98static int fddi_output(struct ifnet *, struct mbuf *, struct sockaddr *, 99 struct rtentry *); 100static void fddi_input(struct ifnet *ifp, struct mbuf *m); 101 102#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 fddi_header *fh; 122 123#ifdef MAC 124 error = mac_check_ifnet_transmit(ifp, m); 125 if (error) 126 senderr(error); 127#endif 128 129 if (ifp->if_flags & IFF_MONITOR) 130 senderr(ENETDOWN); 131 if (!((ifp->if_flags & IFF_UP) && 132 (ifp->if_drv_flags & IFF_DRV_RUNNING))) 133 senderr(ENETDOWN); 134 getmicrotime(&ifp->if_lastchange); 135 136 switch (dst->sa_family) { 137#ifdef INET 138 case AF_INET: { 139 error = arpresolve(ifp, rt0, m, dst, edst); 140 if (error) 141 return (error == EWOULDBLOCK ? 0 : error); 142 type = htons(ETHERTYPE_IP); 143 break; 144 } 145 case AF_ARP: 146 { 147 struct arphdr *ah; 148 ah = mtod(m, struct arphdr *); 149 ah->ar_hrd = htons(ARPHRD_ETHER); 150 151 loop_copy = -1; /* if this is for us, don't do it */ 152 153 switch (ntohs(ah->ar_op)) { 154 case ARPOP_REVREQUEST: 155 case ARPOP_REVREPLY: 156 type = htons(ETHERTYPE_REVARP); 157 break; 158 case ARPOP_REQUEST: 159 case ARPOP_REPLY: 160 default: 161 type = htons(ETHERTYPE_ARP); 162 break; 163 } 164 165 if (m->m_flags & M_BCAST) 166 bcopy(ifp->if_broadcastaddr, edst, FDDI_ADDR_LEN); 167 else 168 bcopy(ar_tha(ah), edst, FDDI_ADDR_LEN); 169 170 } 171 break; 172#endif /* INET */ 173#ifdef INET6 174 case AF_INET6: 175 error = nd6_storelladdr(ifp, rt0, m, dst, (u_char *)edst); 176 if (error) 177 return (error); /* Something bad happened */ 178 type = htons(ETHERTYPE_IPV6); 179 break; 180#endif /* INET6 */ 181#ifdef IPX 182 case AF_IPX: 183 type = htons(ETHERTYPE_IPX); 184 bcopy((caddr_t)&(((struct sockaddr_ipx *)dst)->sipx_addr.x_host), 185 (caddr_t)edst, FDDI_ADDR_LEN); 186 break; 187#endif /* IPX */ 188#ifdef NETATALK 189 case AF_APPLETALK: { 190 struct at_ifaddr *aa; 191 if (!aarpresolve(ifp, m, (struct sockaddr_at *)dst, edst)) 192 return (0); 193 /* 194 * ifaddr is the first thing in at_ifaddr 195 */ 196 if ((aa = at_ifawithnet( (struct sockaddr_at *)dst)) == 0) 197 goto bad; 198 199 /* 200 * In the phase 2 case, we need to prepend an mbuf for the llc header. 201 * Since we must preserve the value of m, which is passed to us by 202 * value, we m_copy() the first mbuf, and use it for our llc header. 203 */ 204 if (aa->aa_flags & AFA_PHASE2) { 205 struct llc llc; 206 207 M_PREPEND(m, LLC_SNAPFRAMELEN, M_TRYWAIT); 208 if (m == 0) 209 senderr(ENOBUFS); 210 llc.llc_dsap = llc.llc_ssap = LLC_SNAP_LSAP; 211 llc.llc_control = LLC_UI; 212 bcopy(at_org_code, llc.llc_snap.org_code, sizeof(at_org_code)); 213 llc.llc_snap.ether_type = htons(ETHERTYPE_AT); 214 bcopy(&llc, mtod(m, caddr_t), LLC_SNAPFRAMELEN); 215 type = 0; 216 } else { 217 type = htons(ETHERTYPE_AT); 218 } 219 break; 220 } 221#endif /* NETATALK */ 222 223 case pseudo_AF_HDRCMPLT: 224 { 225 struct ether_header *eh; 226 hdrcmplt = 1; 227 eh = (struct ether_header *)dst->sa_data; 228 bcopy((caddr_t)eh->ether_shost, (caddr_t)esrc, FDDI_ADDR_LEN); 229 /* FALLTHROUGH */ 230 } 231 232 case AF_UNSPEC: 233 { 234 struct ether_header *eh; 235 loop_copy = -1; 236 eh = (struct ether_header *)dst->sa_data; 237 bcopy((caddr_t)eh->ether_dhost, (caddr_t)edst, FDDI_ADDR_LEN); 238 if (*edst & 1) 239 m->m_flags |= (M_BCAST|M_MCAST); 240 type = eh->ether_type; 241 break; 242 } 243 244 case AF_IMPLINK: 245 { 246 fh = mtod(m, struct fddi_header *); 247 error = EPROTONOSUPPORT; 248 switch (fh->fddi_fc & (FDDIFC_C|FDDIFC_L|FDDIFC_F)) { 249 case FDDIFC_LLC_ASYNC: { 250 /* legal priorities are 0 through 7 */ 251 if ((fh->fddi_fc & FDDIFC_Z) > 7) 252 goto bad; 253 break; 254 } 255 case FDDIFC_LLC_SYNC: { 256 /* FDDIFC_Z bits reserved, must be zero */ 257 if (fh->fddi_fc & FDDIFC_Z) 258 goto bad; 259 break; 260 } 261 case FDDIFC_SMT: { 262 /* FDDIFC_Z bits must be non zero */ 263 if ((fh->fddi_fc & FDDIFC_Z) == 0) 264 goto bad; 265 break; 266 } 267 default: { 268 /* anything else is too dangerous */ 269 goto bad; 270 } 271 } 272 error = 0; 273 if (fh->fddi_dhost[0] & 1) 274 m->m_flags |= (M_BCAST|M_MCAST); 275 goto queue_it; 276 } 277 default: 278 if_printf(ifp, "can't handle af%d\n", dst->sa_family); 279 senderr(EAFNOSUPPORT); 280 } 281 282 /* 283 * Add LLC header. 284 */ 285 if (type != 0) { 286 struct llc *l; 287 M_PREPEND(m, LLC_SNAPFRAMELEN, M_DONTWAIT); 288 if (m == 0) 289 senderr(ENOBUFS); 290 l = mtod(m, struct llc *); 291 l->llc_control = LLC_UI; 292 l->llc_dsap = l->llc_ssap = LLC_SNAP_LSAP; 293 l->llc_snap.org_code[0] = 294 l->llc_snap.org_code[1] = 295 l->llc_snap.org_code[2] = 0; 296 l->llc_snap.ether_type = htons(type); 297 } 298 299 /* 300 * Add local net header. If no space in first mbuf, 301 * allocate another. 302 */ 303 M_PREPEND(m, FDDI_HDR_LEN, M_DONTWAIT); 304 if (m == 0) 305 senderr(ENOBUFS); 306 fh = mtod(m, struct fddi_header *); 307 fh->fddi_fc = FDDIFC_LLC_ASYNC|FDDIFC_LLC_PRIO4; 308 bcopy((caddr_t)edst, (caddr_t)fh->fddi_dhost, FDDI_ADDR_LEN); 309 queue_it: 310 if (hdrcmplt) 311 bcopy((caddr_t)esrc, (caddr_t)fh->fddi_shost, FDDI_ADDR_LEN); 312 else 313 bcopy(IF_LLADDR(ifp), (caddr_t)fh->fddi_shost, 314 FDDI_ADDR_LEN); 315 316 /* 317 * If a simplex interface, and the packet is being sent to our 318 * Ethernet address or a broadcast address, loopback a copy. 319 * XXX To make a simplex device behave exactly like a duplex 320 * device, we should copy in the case of sending to our own 321 * ethernet address (thus letting the original actually appear 322 * on the wire). However, we don't do that here for security 323 * reasons and compatibility with the original behavior. 324 */ 325 if ((ifp->if_flags & IFF_SIMPLEX) && (loop_copy != -1)) { 326 if ((m->m_flags & M_BCAST) || (loop_copy > 0)) { 327 struct mbuf *n; 328 n = m_copy(m, 0, (int)M_COPYALL); 329 (void) if_simloop(ifp, n, dst->sa_family, 330 FDDI_HDR_LEN); 331 } else if (bcmp(fh->fddi_dhost, fh->fddi_shost, 332 FDDI_ADDR_LEN) == 0) { 333 (void) if_simloop(ifp, m, dst->sa_family, 334 FDDI_HDR_LEN); 335 return (0); /* XXX */ 336 } 337 } 338 339 IFQ_HANDOFF(ifp, m, error); 340 if (error) 341 ifp->if_oerrors++; 342 343 return (error); 344 345bad: 346 ifp->if_oerrors++; 347 if (m) 348 m_freem(m); 349 return (error); 350} 351 352/* 353 * Process a received FDDI packet. 354 */ 355static void 356fddi_input(ifp, m) 357 struct ifnet *ifp; 358 struct mbuf *m; 359{ 360 int isr; 361 struct llc *l; 362 struct fddi_header *fh; 363 364 /* 365 * Do consistency checks to verify assumptions 366 * made by code past this point. 367 */ 368 if ((m->m_flags & M_PKTHDR) == 0) { 369 if_printf(ifp, "discard frame w/o packet header\n"); 370 ifp->if_ierrors++; 371 m_freem(m); 372 return; 373 } 374 if (m->m_pkthdr.rcvif == NULL) { 375 if_printf(ifp, "discard frame w/o interface pointer\n"); 376 ifp->if_ierrors++; 377 m_freem(m); 378 return; 379 } 380 381 m = m_pullup(m, FDDI_HDR_LEN); 382 if (m == NULL) { 383 ifp->if_ierrors++; 384 goto dropanyway; 385 } 386 fh = mtod(m, struct fddi_header *); 387 m->m_pkthdr.header = (void *)fh; 388 389 /* 390 * Discard packet if interface is not up. 391 */ 392 if (!((ifp->if_flags & IFF_UP) && 393 (ifp->if_drv_flags & IFF_DRV_RUNNING))) 394 goto dropanyway; 395 396 /* 397 * Give bpf a chance at the packet. 398 */ 399 BPF_MTAP(ifp, m); 400 401 /* 402 * Interface marked for monitoring; discard packet. 403 */ 404 if (ifp->if_flags & IFF_MONITOR) { 405 m_freem(m); 406 return; 407 } 408 409#ifdef MAC 410 mac_create_mbuf_from_ifnet(ifp, m); 411#endif 412 413 /* 414 * Update interface statistics. 415 */ 416 ifp->if_ibytes += m->m_pkthdr.len; 417 getmicrotime(&ifp->if_lastchange); 418 419 /* 420 * Discard non local unicast packets when interface 421 * is in promiscuous mode. 422 */ 423 if ((ifp->if_flags & IFF_PROMISC) && ((fh->fddi_dhost[0] & 1) == 0) && 424 (bcmp(IF_LLADDR(ifp), (caddr_t)fh->fddi_dhost, 425 FDDI_ADDR_LEN) != 0)) 426 goto dropanyway; 427 428 /* 429 * Set mbuf flags for bcast/mcast. 430 */ 431 if (fh->fddi_dhost[0] & 1) { 432 if (bcmp(ifp->if_broadcastaddr, fh->fddi_dhost, 433 FDDI_ADDR_LEN) == 0) 434 m->m_flags |= M_BCAST; 435 else 436 m->m_flags |= M_MCAST; 437 ifp->if_imcasts++; 438 } 439 440#ifdef M_LINK0 441 /* 442 * If this has a LLC priority of 0, then mark it so upper 443 * layers have a hint that it really came via a FDDI/Ethernet 444 * bridge. 445 */ 446 if ((fh->fddi_fc & FDDIFC_LLC_PRIO7) == FDDIFC_LLC_PRIO0) 447 m->m_flags |= M_LINK0; 448#endif 449 450 /* Strip off FDDI header. */ 451 m_adj(m, FDDI_HDR_LEN); 452 453 m = m_pullup(m, LLC_SNAPFRAMELEN); 454 if (m == 0) { 455 ifp->if_ierrors++; 456 goto dropanyway; 457 } 458 l = mtod(m, struct llc *); 459 460 switch (l->llc_dsap) { 461 case LLC_SNAP_LSAP: 462 { 463 u_int16_t type; 464 if ((l->llc_control != LLC_UI) || 465 (l->llc_ssap != LLC_SNAP_LSAP)) { 466 ifp->if_noproto++; 467 goto dropanyway; 468 } 469#ifdef NETATALK 470 if (bcmp(&(l->llc_snap.org_code)[0], at_org_code, 471 sizeof(at_org_code)) == 0 && 472 ntohs(l->llc_snap.ether_type) == ETHERTYPE_AT) { 473 isr = NETISR_ATALK2; 474 m_adj(m, LLC_SNAPFRAMELEN); 475 break; 476 } 477 478 if (bcmp(&(l->llc_snap.org_code)[0], aarp_org_code, 479 sizeof(aarp_org_code)) == 0 && 480 ntohs(l->llc_snap.ether_type) == ETHERTYPE_AARP) { 481 m_adj(m, LLC_SNAPFRAMELEN); 482 isr = NETISR_AARP; 483 break; 484 } 485#endif /* NETATALK */ 486 if (l->llc_snap.org_code[0] != 0 || 487 l->llc_snap.org_code[1] != 0 || 488 l->llc_snap.org_code[2] != 0) { 489 ifp->if_noproto++; 490 goto dropanyway; 491 } 492 493 type = ntohs(l->llc_snap.ether_type); 494 m_adj(m, LLC_SNAPFRAMELEN); 495 496 switch (type) { 497#ifdef INET 498 case ETHERTYPE_IP: 499 if ((m = ip_fastforward(m)) == NULL) 500 return; 501 isr = NETISR_IP; 502 break; 503 504 case ETHERTYPE_ARP: 505 if (ifp->if_flags & IFF_NOARP) 506 goto dropanyway; 507 isr = NETISR_ARP; 508 break; 509#endif 510#ifdef INET6 511 case ETHERTYPE_IPV6: 512 isr = NETISR_IPV6; 513 break; 514#endif 515#ifdef IPX 516 case ETHERTYPE_IPX: 517 isr = NETISR_IPX; 518 break; 519#endif 520#ifdef DECNET 521 case ETHERTYPE_DECNET: 522 isr = NETISR_DECNET; 523 break; 524#endif 525#ifdef NETATALK 526 case ETHERTYPE_AT: 527 isr = NETISR_ATALK1; 528 break; 529 case ETHERTYPE_AARP: 530 isr = NETISR_AARP; 531 break; 532#endif /* NETATALK */ 533 default: 534 /* printf("fddi_input: unknown protocol 0x%x\n", type); */ 535 ifp->if_noproto++; 536 goto dropanyway; 537 } 538 break; 539 } 540 541 default: 542 /* printf("fddi_input: unknown dsap 0x%x\n", l->llc_dsap); */ 543 ifp->if_noproto++; 544 goto dropanyway; 545 } 546 netisr_dispatch(isr, m); 547 return; 548 549dropanyway: 550 ifp->if_iqdrops++; 551 if (m) 552 m_freem(m); 553 return; 554} 555 556/* 557 * Perform common duties while attaching to interface list 558 */ 559void 560fddi_ifattach(ifp, lla, bpf) 561 struct ifnet *ifp; 562 const u_int8_t *lla; 563 int bpf; 564{ 565 struct ifaddr *ifa; 566 struct sockaddr_dl *sdl; 567 568 ifp->if_type = IFT_FDDI; 569 ifp->if_addrlen = FDDI_ADDR_LEN; 570 ifp->if_hdrlen = 21; 571 572 if_attach(ifp); /* Must be called before additional assignments */ 573 574 ifp->if_mtu = FDDIMTU; 575 ifp->if_output = fddi_output; 576 ifp->if_input = fddi_input; 577 ifp->if_resolvemulti = fddi_resolvemulti; 578 ifp->if_broadcastaddr = fddibroadcastaddr; 579 ifp->if_baudrate = 100000000; 580#ifdef IFF_NOTRAILERS 581 ifp->if_flags |= IFF_NOTRAILERS; 582#endif 583 ifa = ifp->if_addr; 584 KASSERT(ifa != NULL, ("%s: no lladdr!\n", __func__)); 585 586 sdl = (struct sockaddr_dl *)ifa->ifa_addr; 587 sdl->sdl_type = IFT_FDDI; 588 sdl->sdl_alen = ifp->if_addrlen; 589 bcopy(lla, LLADDR(sdl), ifp->if_addrlen); 590 591 if (bpf) 592 bpfattach(ifp, DLT_FDDI, FDDI_HDR_LEN); 593 594 return; 595} 596 597void 598fddi_ifdetach(ifp, bpf) 599 struct ifnet *ifp; 600 int bpf; 601{ 602 603 if (bpf) 604 bpfdetach(ifp); 605 606 if_detach(ifp); 607 608 return; 609} 610 611int 612fddi_ioctl (ifp, command, data) 613 struct ifnet *ifp; 614 int command; 615 caddr_t data; 616{ 617 struct ifaddr *ifa; 618 struct ifreq *ifr; 619 int error; 620 621 ifa = (struct ifaddr *) data; 622 ifr = (struct ifreq *) data; 623 error = 0; 624 625 switch (command) { 626 case SIOCSIFADDR: 627 ifp->if_flags |= IFF_UP; 628 629 switch (ifa->ifa_addr->sa_family) { 630#ifdef INET 631 case AF_INET: /* before arpwhohas */ 632 ifp->if_init(ifp->if_softc); 633 arp_ifinit(ifp, ifa); 634 break; 635#endif 636#ifdef IPX 637 /* 638 * XXX - This code is probably wrong 639 */ 640 case AF_IPX: { 641 struct ipx_addr *ina; 642 643 ina = &(IA_SIPX(ifa)->sipx_addr); 644 645 if (ipx_nullhost(*ina)) { 646 ina->x_host = *(union ipx_host *) 647 IF_LLADDR(ifp); 648 } else { 649 bcopy((caddr_t) ina->x_host.c_host, 650 (caddr_t) IF_LLADDR(ifp), 651 ETHER_ADDR_LEN); 652 } 653 654 /* 655 * Set new address 656 */ 657 ifp->if_init(ifp->if_softc); 658 } 659 break; 660#endif 661 default: 662 ifp->if_init(ifp->if_softc); 663 break; 664 } 665 break; 666 case SIOCGIFADDR: { 667 struct sockaddr *sa; 668 669 sa = (struct sockaddr *) & ifr->ifr_data; 670 bcopy(IF_LLADDR(ifp), 671 (caddr_t) sa->sa_data, FDDI_ADDR_LEN); 672 673 } 674 break; 675 case SIOCSIFMTU: 676 /* 677 * Set the interface MTU. 678 */ 679 if (ifr->ifr_mtu > FDDIMTU) { 680 error = EINVAL; 681 } else { 682 ifp->if_mtu = ifr->ifr_mtu; 683 } 684 break; 685 default: 686 error = EINVAL; 687 break; 688 } 689 690 return (error); 691} 692 693static int 694fddi_resolvemulti(ifp, llsa, sa) 695 struct ifnet *ifp; 696 struct sockaddr **llsa; 697 struct sockaddr *sa; 698{ 699 struct sockaddr_dl *sdl; 700 struct sockaddr_in *sin; 701#ifdef INET6 702 struct sockaddr_in6 *sin6; 703#endif 704 u_char *e_addr; 705 706 switch(sa->sa_family) { 707 case AF_LINK: 708 /* 709 * No mapping needed. Just check that it's a valid MC address. 710 */ 711 sdl = (struct sockaddr_dl *)sa; 712 e_addr = LLADDR(sdl); 713 if ((e_addr[0] & 1) != 1) 714 return (EADDRNOTAVAIL); 715 *llsa = 0; 716 return (0); 717 718#ifdef INET 719 case AF_INET: 720 sin = (struct sockaddr_in *)sa; 721 if (!IN_MULTICAST(ntohl(sin->sin_addr.s_addr))) 722 return (EADDRNOTAVAIL); 723 MALLOC(sdl, struct sockaddr_dl *, sizeof *sdl, M_IFMADDR, 724 M_NOWAIT | M_ZERO); 725 if (sdl == NULL) 726 return (ENOMEM); 727 sdl->sdl_len = sizeof *sdl; 728 sdl->sdl_family = AF_LINK; 729 sdl->sdl_index = ifp->if_index; 730 sdl->sdl_type = IFT_FDDI; 731 sdl->sdl_nlen = 0; 732 sdl->sdl_alen = FDDI_ADDR_LEN; 733 sdl->sdl_slen = 0; 734 e_addr = LLADDR(sdl); 735 ETHER_MAP_IP_MULTICAST(&sin->sin_addr, e_addr); 736 *llsa = (struct sockaddr *)sdl; 737 return (0); 738#endif 739#ifdef INET6 740 case AF_INET6: 741 sin6 = (struct sockaddr_in6 *)sa; 742 if (IN6_IS_ADDR_UNSPECIFIED(&sin6->sin6_addr)) { 743 /* 744 * An IP6 address of 0 means listen to all 745 * of the Ethernet multicast address used for IP6. 746 * (This is used for multicast routers.) 747 */ 748 ifp->if_flags |= IFF_ALLMULTI; 749 *llsa = 0; 750 return (0); 751 } 752 if (!IN6_IS_ADDR_MULTICAST(&sin6->sin6_addr)) 753 return (EADDRNOTAVAIL); 754 MALLOC(sdl, struct sockaddr_dl *, sizeof *sdl, M_IFMADDR, 755 M_NOWAIT | M_ZERO); 756 if (sdl == NULL) 757 return (ENOMEM); 758 sdl->sdl_len = sizeof *sdl; 759 sdl->sdl_family = AF_LINK; 760 sdl->sdl_index = ifp->if_index; 761 sdl->sdl_type = IFT_FDDI; 762 sdl->sdl_nlen = 0; 763 sdl->sdl_alen = FDDI_ADDR_LEN; 764 sdl->sdl_slen = 0; 765 e_addr = LLADDR(sdl); 766 ETHER_MAP_IPV6_MULTICAST(&sin6->sin6_addr, e_addr); 767 *llsa = (struct sockaddr *)sdl; 768 return (0); 769#endif 770 771 default: 772 /* 773 * Well, the text isn't quite right, but it's the name 774 * that counts... 775 */ 776 return (EAFNOSUPPORT); 777 } 778 779 return (0); 780} 781 782static moduledata_t fddi_mod = { 783 "fddi", /* module name */ 784 NULL, /* event handler */ 785 0 /* extra data */ 786}; 787 788DECLARE_MODULE(fddi, fddi_mod, SI_SUB_PSEUDO, SI_ORDER_ANY); 789MODULE_VERSION(fddi, 1); 790