if_fddisubr.c revision 193891
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 193891 2009-06-10 09:07:05Z bz $ 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 *, 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(ifp, m, dst, ro) 114 struct ifnet *ifp; 115 struct mbuf *m; 116 struct sockaddr *dst; 117 struct route *ro; 118{ 119 u_int16_t type; 120 int loop_copy = 0, error = 0, hdrcmplt = 0; 121 u_char esrc[FDDI_ADDR_LEN], edst[FDDI_ADDR_LEN]; 122 struct fddi_header *fh; 123#if defined(INET) || defined(INET6) 124 struct llentry *lle; 125#endif 126 127#ifdef MAC 128 error = mac_ifnet_check_transmit(ifp, m); 129 if (error) 130 senderr(error); 131#endif 132 133 if (ifp->if_flags & IFF_MONITOR) 134 senderr(ENETDOWN); 135 if (!((ifp->if_flags & IFF_UP) && 136 (ifp->if_drv_flags & IFF_DRV_RUNNING))) 137 senderr(ENETDOWN); 138 getmicrotime(&ifp->if_lastchange); 139 140 switch (dst->sa_family) { 141#ifdef INET 142 case AF_INET: { 143 struct rtentry *rt0 = NULL; 144 145 if (ro != NULL) 146 rt0 = ro->ro_rt; 147 error = arpresolve(ifp, rt0, m, dst, edst, &lle); 148 if (error) 149 return (error == EWOULDBLOCK ? 0 : error); 150 type = htons(ETHERTYPE_IP); 151 break; 152 } 153 case AF_ARP: 154 { 155 struct arphdr *ah; 156 ah = mtod(m, struct arphdr *); 157 ah->ar_hrd = htons(ARPHRD_ETHER); 158 159 loop_copy = -1; /* if this is for us, don't do it */ 160 161 switch (ntohs(ah->ar_op)) { 162 case ARPOP_REVREQUEST: 163 case ARPOP_REVREPLY: 164 type = htons(ETHERTYPE_REVARP); 165 break; 166 case ARPOP_REQUEST: 167 case ARPOP_REPLY: 168 default: 169 type = htons(ETHERTYPE_ARP); 170 break; 171 } 172 173 if (m->m_flags & M_BCAST) 174 bcopy(ifp->if_broadcastaddr, edst, FDDI_ADDR_LEN); 175 else 176 bcopy(ar_tha(ah), edst, FDDI_ADDR_LEN); 177 178 } 179 break; 180#endif /* INET */ 181#ifdef INET6 182 case AF_INET6: 183 error = nd6_storelladdr(ifp, m, dst, (u_char *)edst, &lle); 184 if (error) 185 return (error); /* Something bad happened */ 186 type = htons(ETHERTYPE_IPV6); 187 break; 188#endif /* INET6 */ 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, FDDI_ADDR_LEN); 194 break; 195#endif /* IPX */ 196#ifdef NETATALK 197 case AF_APPLETALK: { 198 struct at_ifaddr *aa; 199 if (!aarpresolve(ifp, 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, LLC_SNAPFRAMELEN, M_WAIT); 216 llc.llc_dsap = llc.llc_ssap = LLC_SNAP_LSAP; 217 llc.llc_control = LLC_UI; 218 bcopy(at_org_code, llc.llc_snap.org_code, sizeof(at_org_code)); 219 llc.llc_snap.ether_type = htons(ETHERTYPE_AT); 220 bcopy(&llc, mtod(m, caddr_t), LLC_SNAPFRAMELEN); 221 type = 0; 222 } else { 223 type = htons(ETHERTYPE_AT); 224 } 225 break; 226 } 227#endif /* NETATALK */ 228 229 case pseudo_AF_HDRCMPLT: 230 { 231 struct ether_header *eh; 232 hdrcmplt = 1; 233 eh = (struct ether_header *)dst->sa_data; 234 bcopy((caddr_t)eh->ether_shost, (caddr_t)esrc, FDDI_ADDR_LEN); 235 /* FALLTHROUGH */ 236 } 237 238 case AF_UNSPEC: 239 { 240 struct ether_header *eh; 241 loop_copy = -1; 242 eh = (struct ether_header *)dst->sa_data; 243 bcopy((caddr_t)eh->ether_dhost, (caddr_t)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_DONTWAIT); 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_DONTWAIT); 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 m->m_pkthdr.header = (void *)fh; 394 395 /* 396 * Discard packet if interface is not up. 397 */ 398 if (!((ifp->if_flags & IFF_UP) && 399 (ifp->if_drv_flags & IFF_DRV_RUNNING))) 400 goto dropanyway; 401 402 /* 403 * Give bpf a chance at the packet. 404 */ 405 BPF_MTAP(ifp, m); 406 407 /* 408 * Interface marked for monitoring; discard packet. 409 */ 410 if (ifp->if_flags & IFF_MONITOR) { 411 m_freem(m); 412 return; 413 } 414 415#ifdef MAC 416 mac_ifnet_create_mbuf(ifp, m); 417#endif 418 419 /* 420 * Update interface statistics. 421 */ 422 ifp->if_ibytes += m->m_pkthdr.len; 423 getmicrotime(&ifp->if_lastchange); 424 425 /* 426 * Discard non local unicast packets when interface 427 * is in promiscuous mode. 428 */ 429 if ((ifp->if_flags & IFF_PROMISC) && ((fh->fddi_dhost[0] & 1) == 0) && 430 (bcmp(IF_LLADDR(ifp), (caddr_t)fh->fddi_dhost, 431 FDDI_ADDR_LEN) != 0)) 432 goto dropanyway; 433 434 /* 435 * Set mbuf flags for bcast/mcast. 436 */ 437 if (fh->fddi_dhost[0] & 1) { 438 if (bcmp(ifp->if_broadcastaddr, fh->fddi_dhost, 439 FDDI_ADDR_LEN) == 0) 440 m->m_flags |= M_BCAST; 441 else 442 m->m_flags |= M_MCAST; 443 ifp->if_imcasts++; 444 } 445 446#ifdef M_LINK0 447 /* 448 * If this has a LLC priority of 0, then mark it so upper 449 * layers have a hint that it really came via a FDDI/Ethernet 450 * bridge. 451 */ 452 if ((fh->fddi_fc & FDDIFC_LLC_PRIO7) == FDDIFC_LLC_PRIO0) 453 m->m_flags |= M_LINK0; 454#endif 455 456 /* Strip off FDDI header. */ 457 m_adj(m, FDDI_HDR_LEN); 458 459 m = m_pullup(m, LLC_SNAPFRAMELEN); 460 if (m == 0) { 461 ifp->if_ierrors++; 462 goto dropanyway; 463 } 464 l = mtod(m, struct llc *); 465 466 switch (l->llc_dsap) { 467 case LLC_SNAP_LSAP: 468 { 469 u_int16_t type; 470 if ((l->llc_control != LLC_UI) || 471 (l->llc_ssap != LLC_SNAP_LSAP)) { 472 ifp->if_noproto++; 473 goto dropanyway; 474 } 475#ifdef NETATALK 476 if (bcmp(&(l->llc_snap.org_code)[0], at_org_code, 477 sizeof(at_org_code)) == 0 && 478 ntohs(l->llc_snap.ether_type) == ETHERTYPE_AT) { 479 isr = NETISR_ATALK2; 480 m_adj(m, LLC_SNAPFRAMELEN); 481 break; 482 } 483 484 if (bcmp(&(l->llc_snap.org_code)[0], aarp_org_code, 485 sizeof(aarp_org_code)) == 0 && 486 ntohs(l->llc_snap.ether_type) == ETHERTYPE_AARP) { 487 m_adj(m, LLC_SNAPFRAMELEN); 488 isr = NETISR_AARP; 489 break; 490 } 491#endif /* NETATALK */ 492 if (l->llc_snap.org_code[0] != 0 || 493 l->llc_snap.org_code[1] != 0 || 494 l->llc_snap.org_code[2] != 0) { 495 ifp->if_noproto++; 496 goto dropanyway; 497 } 498 499 type = ntohs(l->llc_snap.ether_type); 500 m_adj(m, LLC_SNAPFRAMELEN); 501 502 switch (type) { 503#ifdef INET 504 case ETHERTYPE_IP: 505 if ((m = ip_fastforward(m)) == NULL) 506 return; 507 isr = NETISR_IP; 508 break; 509 510 case ETHERTYPE_ARP: 511 if (ifp->if_flags & IFF_NOARP) 512 goto dropanyway; 513 isr = NETISR_ARP; 514 break; 515#endif 516#ifdef INET6 517 case ETHERTYPE_IPV6: 518 isr = NETISR_IPV6; 519 break; 520#endif 521#ifdef IPX 522 case ETHERTYPE_IPX: 523 isr = NETISR_IPX; 524 break; 525#endif 526#ifdef DECNET 527 case ETHERTYPE_DECNET: 528 isr = NETISR_DECNET; 529 break; 530#endif 531#ifdef NETATALK 532 case ETHERTYPE_AT: 533 isr = NETISR_ATALK1; 534 break; 535 case ETHERTYPE_AARP: 536 isr = NETISR_AARP; 537 break; 538#endif /* NETATALK */ 539 default: 540 /* printf("fddi_input: unknown protocol 0x%x\n", type); */ 541 ifp->if_noproto++; 542 goto dropanyway; 543 } 544 break; 545 } 546 547 default: 548 /* printf("fddi_input: unknown dsap 0x%x\n", l->llc_dsap); */ 549 ifp->if_noproto++; 550 goto dropanyway; 551 } 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 int 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 struct sockaddr *sa; 674 675 sa = (struct sockaddr *) & ifr->ifr_data; 676 bcopy(IF_LLADDR(ifp), 677 (caddr_t) sa->sa_data, FDDI_ADDR_LEN); 678 679 } 680 break; 681 case SIOCSIFMTU: 682 /* 683 * Set the interface MTU. 684 */ 685 if (ifr->ifr_mtu > FDDIMTU) { 686 error = EINVAL; 687 } else { 688 ifp->if_mtu = ifr->ifr_mtu; 689 } 690 break; 691 default: 692 error = EINVAL; 693 break; 694 } 695 696 return (error); 697} 698 699static int 700fddi_resolvemulti(ifp, llsa, sa) 701 struct ifnet *ifp; 702 struct sockaddr **llsa; 703 struct sockaddr *sa; 704{ 705 struct sockaddr_dl *sdl; 706#ifdef INET 707 struct sockaddr_in *sin; 708#endif 709#ifdef INET6 710 struct sockaddr_in6 *sin6; 711#endif 712 u_char *e_addr; 713 714 switch(sa->sa_family) { 715 case AF_LINK: 716 /* 717 * No mapping needed. Just check that it's a valid MC address. 718 */ 719 sdl = (struct sockaddr_dl *)sa; 720 e_addr = LLADDR(sdl); 721 if ((e_addr[0] & 1) != 1) 722 return (EADDRNOTAVAIL); 723 *llsa = 0; 724 return (0); 725 726#ifdef INET 727 case AF_INET: 728 sin = (struct sockaddr_in *)sa; 729 if (!IN_MULTICAST(ntohl(sin->sin_addr.s_addr))) 730 return (EADDRNOTAVAIL); 731 sdl = malloc(sizeof *sdl, M_IFMADDR, 732 M_NOWAIT | M_ZERO); 733 if (sdl == NULL) 734 return (ENOMEM); 735 sdl->sdl_len = sizeof *sdl; 736 sdl->sdl_family = AF_LINK; 737 sdl->sdl_index = ifp->if_index; 738 sdl->sdl_type = IFT_FDDI; 739 sdl->sdl_nlen = 0; 740 sdl->sdl_alen = FDDI_ADDR_LEN; 741 sdl->sdl_slen = 0; 742 e_addr = LLADDR(sdl); 743 ETHER_MAP_IP_MULTICAST(&sin->sin_addr, e_addr); 744 *llsa = (struct sockaddr *)sdl; 745 return (0); 746#endif 747#ifdef INET6 748 case AF_INET6: 749 sin6 = (struct sockaddr_in6 *)sa; 750 if (IN6_IS_ADDR_UNSPECIFIED(&sin6->sin6_addr)) { 751 /* 752 * An IP6 address of 0 means listen to all 753 * of the Ethernet multicast address used for IP6. 754 * (This is used for multicast routers.) 755 */ 756 ifp->if_flags |= IFF_ALLMULTI; 757 *llsa = 0; 758 return (0); 759 } 760 if (!IN6_IS_ADDR_MULTICAST(&sin6->sin6_addr)) 761 return (EADDRNOTAVAIL); 762 sdl = malloc(sizeof *sdl, M_IFMADDR, 763 M_NOWAIT | M_ZERO); 764 if (sdl == NULL) 765 return (ENOMEM); 766 sdl->sdl_len = sizeof *sdl; 767 sdl->sdl_family = AF_LINK; 768 sdl->sdl_index = ifp->if_index; 769 sdl->sdl_type = IFT_FDDI; 770 sdl->sdl_nlen = 0; 771 sdl->sdl_alen = FDDI_ADDR_LEN; 772 sdl->sdl_slen = 0; 773 e_addr = LLADDR(sdl); 774 ETHER_MAP_IPV6_MULTICAST(&sin6->sin6_addr, e_addr); 775 *llsa = (struct sockaddr *)sdl; 776 return (0); 777#endif 778 779 default: 780 /* 781 * Well, the text isn't quite right, but it's the name 782 * that counts... 783 */ 784 return (EAFNOSUPPORT); 785 } 786 787 return (0); 788} 789 790static moduledata_t fddi_mod = { 791 "fddi", /* module name */ 792 NULL, /* event handler */ 793 0 /* extra data */ 794}; 795 796DECLARE_MODULE(fddi, fddi_mod, SI_SUB_PSEUDO, SI_ORDER_ANY); 797MODULE_VERSION(fddi, 1); 798