if_fddisubr.c revision 127836
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 127836 2004-04-04 11:52:09Z luigi $ 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 const 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)) 145 return (0); /* if not yet resolved */ 146 type = htons(ETHERTYPE_IP); 147 break; 148 } 149 case AF_ARP: 150 { 151 struct arphdr *ah; 152 ah = mtod(m, struct arphdr *); 153 ah->ar_hrd = htons(ARPHRD_ETHER); 154 155 loop_copy = -1; /* if this is for us, don't do it */ 156 157 switch (ntohs(ah->ar_op)) { 158 case ARPOP_REVREQUEST: 159 case ARPOP_REVREPLY: 160 type = htons(ETHERTYPE_REVARP); 161 break; 162 case ARPOP_REQUEST: 163 case ARPOP_REPLY: 164 default: 165 type = htons(ETHERTYPE_ARP); 166 break; 167 } 168 169 if (m->m_flags & M_BCAST) 170 bcopy(ifp->if_broadcastaddr, edst, FDDI_ADDR_LEN); 171 else 172 bcopy(ar_tha(ah), edst, FDDI_ADDR_LEN); 173 174 } 175 break; 176#endif /* INET */ 177#ifdef INET6 178 case AF_INET6: 179 if (!nd6_storelladdr(ifp, rt, m, dst, (u_char *)edst)) { 180 /* Something bad happened */ 181 return (0); 182 } 183 type = htons(ETHERTYPE_IPV6); 184 break; 185#endif /* INET6 */ 186#ifdef IPX 187 case AF_IPX: 188 type = htons(ETHERTYPE_IPX); 189 bcopy((caddr_t)&(((struct sockaddr_ipx *)dst)->sipx_addr.x_host), 190 (caddr_t)edst, FDDI_ADDR_LEN); 191 break; 192#endif /* IPX */ 193#ifdef NETATALK 194 case AF_APPLETALK: { 195 struct at_ifaddr *aa; 196 if (!aarpresolve(ac, m, (struct sockaddr_at *)dst, edst)) 197 return (0); 198 /* 199 * ifaddr is the first thing in at_ifaddr 200 */ 201 if ((aa = at_ifawithnet( (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_TRYWAIT); 213 if (m == 0) 214 senderr(ENOBUFS); 215 llc.llc_dsap = llc.llc_ssap = LLC_SNAP_LSAP; 216 llc.llc_control = LLC_UI; 217 bcopy(at_org_code, llc.llc_snap.org_code, sizeof(at_org_code)); 218 llc.llc_snap.ether_type = htons(ETHERTYPE_AT); 219 bcopy(&llc, mtod(m, caddr_t), LLC_SNAPFRAMELEN); 220 type = 0; 221 } else { 222 type = htons(ETHERTYPE_AT); 223 } 224 break; 225 } 226#endif /* NETATALK */ 227 228 case pseudo_AF_HDRCMPLT: 229 { 230 struct ether_header *eh; 231 hdrcmplt = 1; 232 eh = (struct ether_header *)dst->sa_data; 233 bcopy((caddr_t)eh->ether_shost, (caddr_t)esrc, FDDI_ADDR_LEN); 234 /* FALLTHROUGH */ 235 } 236 237 case AF_UNSPEC: 238 { 239 struct ether_header *eh; 240 loop_copy = -1; 241 eh = (struct ether_header *)dst->sa_data; 242 bcopy((caddr_t)eh->ether_dhost, (caddr_t)edst, FDDI_ADDR_LEN); 243 if (*edst & 1) 244 m->m_flags |= (M_BCAST|M_MCAST); 245 type = eh->ether_type; 246 break; 247 } 248 249 case AF_IMPLINK: 250 { 251 fh = mtod(m, struct fddi_header *); 252 error = EPROTONOSUPPORT; 253 switch (fh->fddi_fc & (FDDIFC_C|FDDIFC_L|FDDIFC_F)) { 254 case FDDIFC_LLC_ASYNC: { 255 /* legal priorities are 0 through 7 */ 256 if ((fh->fddi_fc & FDDIFC_Z) > 7) 257 goto bad; 258 break; 259 } 260 case FDDIFC_LLC_SYNC: { 261 /* FDDIFC_Z bits reserved, must be zero */ 262 if (fh->fddi_fc & FDDIFC_Z) 263 goto bad; 264 break; 265 } 266 case FDDIFC_SMT: { 267 /* FDDIFC_Z bits must be non zero */ 268 if ((fh->fddi_fc & FDDIFC_Z) == 0) 269 goto bad; 270 break; 271 } 272 default: { 273 /* anything else is too dangerous */ 274 goto bad; 275 } 276 } 277 error = 0; 278 if (fh->fddi_dhost[0] & 1) 279 m->m_flags |= (M_BCAST|M_MCAST); 280 goto queue_it; 281 } 282 default: 283 if_printf(ifp, "can't handle af%d\n", dst->sa_family); 284 senderr(EAFNOSUPPORT); 285 } 286 287 /* 288 * Add LLC header. 289 */ 290 if (type != 0) { 291 struct llc *l; 292 M_PREPEND(m, LLC_SNAPFRAMELEN, M_DONTWAIT); 293 if (m == 0) 294 senderr(ENOBUFS); 295 l = mtod(m, struct llc *); 296 l->llc_control = LLC_UI; 297 l->llc_dsap = l->llc_ssap = LLC_SNAP_LSAP; 298 l->llc_snap.org_code[0] = 299 l->llc_snap.org_code[1] = 300 l->llc_snap.org_code[2] = 0; 301 l->llc_snap.ether_type = htons(type); 302 } 303 304 /* 305 * Add local net header. If no space in first mbuf, 306 * allocate another. 307 */ 308 M_PREPEND(m, FDDI_HDR_LEN, M_DONTWAIT); 309 if (m == 0) 310 senderr(ENOBUFS); 311 fh = mtod(m, struct fddi_header *); 312 fh->fddi_fc = FDDIFC_LLC_ASYNC|FDDIFC_LLC_PRIO4; 313 bcopy((caddr_t)edst, (caddr_t)fh->fddi_dhost, FDDI_ADDR_LEN); 314 queue_it: 315 if (hdrcmplt) 316 bcopy((caddr_t)esrc, (caddr_t)fh->fddi_shost, FDDI_ADDR_LEN); 317 else 318 bcopy((caddr_t)ac->ac_enaddr, (caddr_t)fh->fddi_shost, 319 FDDI_ADDR_LEN); 320 321 /* 322 * If a simplex interface, and the packet is being sent to our 323 * Ethernet address or a broadcast address, loopback a copy. 324 * XXX To make a simplex device behave exactly like a duplex 325 * device, we should copy in the case of sending to our own 326 * ethernet address (thus letting the original actually appear 327 * on the wire). However, we don't do that here for security 328 * reasons and compatibility with the original behavior. 329 */ 330 if ((ifp->if_flags & IFF_SIMPLEX) && (loop_copy != -1)) { 331 if ((m->m_flags & M_BCAST) || (loop_copy > 0)) { 332 struct mbuf *n; 333 n = m_copy(m, 0, (int)M_COPYALL); 334 (void) if_simloop(ifp, n, dst->sa_family, 335 FDDI_HDR_LEN); 336 } else if (bcmp(fh->fddi_dhost, fh->fddi_shost, 337 FDDI_ADDR_LEN) == 0) { 338 (void) if_simloop(ifp, m, dst->sa_family, 339 FDDI_HDR_LEN); 340 return (0); /* XXX */ 341 } 342 } 343 344 if (! IF_HANDOFF(&ifp->if_snd, m, ifp)) 345 senderr(ENOBUFS); 346 return (error); 347 348bad: 349 ifp->if_oerrors++; 350 if (m) 351 m_freem(m); 352 return (error); 353} 354 355/* 356 * Process a received FDDI packet. 357 */ 358static void 359fddi_input(ifp, m) 360 struct ifnet *ifp; 361 struct mbuf *m; 362{ 363 int isr; 364 struct llc *l; 365 struct fddi_header *fh; 366 367 /* 368 * Do consistency checks to verify assumptions 369 * made by code past this point. 370 */ 371 if ((m->m_flags & M_PKTHDR) == 0) { 372 if_printf(ifp, "discard frame w/o packet header\n"); 373 ifp->if_ierrors++; 374 m_freem(m); 375 return; 376 } 377 if (m->m_pkthdr.rcvif == NULL) { 378 if_printf(ifp, "discard frame w/o interface pointer\n"); 379 ifp->if_ierrors++; 380 m_freem(m); 381 return; 382 } 383 384 m = m_pullup(m, FDDI_HDR_LEN); 385 if (m == NULL) { 386 ifp->if_ierrors++; 387 goto dropanyway; 388 } 389 fh = mtod(m, struct fddi_header *); 390 m->m_pkthdr.header = (void *)fh; 391 392 /* 393 * Discard packet if interface is not up. 394 */ 395 if ((ifp->if_flags & (IFF_UP|IFF_RUNNING)) != (IFF_UP|IFF_RUNNING)) 396 goto dropanyway; 397 398 /* 399 * Give bpf a chance at the packet. 400 */ 401 BPF_MTAP(ifp, m); 402 403 /* 404 * Interface marked for monitoring; discard packet. 405 */ 406 if (ifp->if_flags & IFF_MONITOR) { 407 m_freem(m); 408 return; 409 } 410 411#ifdef MAC 412 mac_create_mbuf_from_ifnet(ifp, m); 413#endif 414 415 /* 416 * Update interface statistics. 417 */ 418 ifp->if_ibytes += m->m_pkthdr.len; 419 getmicrotime(&ifp->if_lastchange); 420 421 /* 422 * Discard non local unicast packets when interface 423 * is in promiscuous mode. 424 */ 425 if ((ifp->if_flags & IFF_PROMISC) && ((fh->fddi_dhost[0] & 1) == 0) && 426 (bcmp(IFP2AC(ifp)->ac_enaddr, (caddr_t)fh->fddi_dhost, 427 FDDI_ADDR_LEN) != 0)) 428 goto dropanyway; 429 430 /* 431 * Set mbuf flags for bcast/mcast. 432 */ 433 if (fh->fddi_dhost[0] & 1) { 434 if (bcmp(ifp->if_broadcastaddr, fh->fddi_dhost, 435 FDDI_ADDR_LEN) == 0) 436 m->m_flags |= M_BCAST; 437 else 438 m->m_flags |= M_MCAST; 439 ifp->if_imcasts++; 440 } 441 442#ifdef M_LINK0 443 /* 444 * If this has a LLC priority of 0, then mark it so upper 445 * layers have a hint that it really came via a FDDI/Ethernet 446 * bridge. 447 */ 448 if ((fh->fddi_fc & FDDIFC_LLC_PRIO7) == FDDIFC_LLC_PRIO0) 449 m->m_flags |= M_LINK0; 450#endif 451 452 /* Strip off FDDI header. */ 453 m_adj(m, FDDI_HDR_LEN); 454 455 m = m_pullup(m, LLC_SNAPFRAMELEN); 456 if (m == 0) { 457 ifp->if_ierrors++; 458 goto dropanyway; 459 } 460 l = mtod(m, struct llc *); 461 462 switch (l->llc_dsap) { 463 case LLC_SNAP_LSAP: 464 { 465 u_int16_t type; 466 if ((l->llc_control != LLC_UI) || 467 (l->llc_ssap != LLC_SNAP_LSAP)) { 468 ifp->if_noproto++; 469 goto dropanyway; 470 } 471#ifdef NETATALK 472 if (Bcmp(&(l->llc_snap.org_code)[0], at_org_code, 473 sizeof(at_org_code)) == 0 && 474 ntohs(l->llc_snap.ether_type) == ETHERTYPE_AT) { 475 isr = NETISR_ATALK2; 476 m_adj(m, LLC_SNAPFRAMELEN); 477 break; 478 } 479 480 if (Bcmp(&(l->llc_snap.org_code)[0], aarp_org_code, 481 sizeof(aarp_org_code)) == 0 && 482 ntohs(l->llc_snap.ether_type) == ETHERTYPE_AARP) { 483 m_adj(m, LLC_SNAPFRAMELEN); 484 isr = NETISR_AARP; 485 break; 486 } 487#endif /* NETATALK */ 488 if (l->llc_snap.org_code[0] != 0 || 489 l->llc_snap.org_code[1] != 0 || 490 l->llc_snap.org_code[2] != 0) { 491 ifp->if_noproto++; 492 goto dropanyway; 493 } 494 495 type = ntohs(l->llc_snap.ether_type); 496 m_adj(m, LLC_SNAPFRAMELEN); 497 498 switch (type) { 499#ifdef INET 500 case ETHERTYPE_IP: 501 if (ip_fastforward(m)) 502 return; 503 isr = NETISR_IP; 504 break; 505 506 case ETHERTYPE_ARP: 507 if (ifp->if_flags & IFF_NOARP) 508 goto dropanyway; 509 isr = NETISR_ARP; 510 break; 511#endif 512#ifdef INET6 513 case ETHERTYPE_IPV6: 514 isr = NETISR_IPV6; 515 break; 516#endif 517#ifdef IPX 518 case ETHERTYPE_IPX: 519 isr = NETISR_IPX; 520 break; 521#endif 522#ifdef DECNET 523 case ETHERTYPE_DECNET: 524 isr = NETISR_DECNET; 525 break; 526#endif 527#ifdef NETATALK 528 case ETHERTYPE_AT: 529 isr = NETISR_ATALK1; 530 break; 531 case ETHERTYPE_AARP: 532 isr = NETISR_AARP; 533 break; 534#endif /* NETATALK */ 535 default: 536 /* printf("fddi_input: unknown protocol 0x%x\n", type); */ 537 ifp->if_noproto++; 538 goto dropanyway; 539 } 540 break; 541 } 542 543 default: 544 /* printf("fddi_input: unknown dsap 0x%x\n", l->llc_dsap); */ 545 ifp->if_noproto++; 546 goto dropanyway; 547 } 548 netisr_dispatch(isr, m); 549 return; 550 551dropanyway: 552 ifp->if_iqdrops++; 553 if (m) 554 m_freem(m); 555 return; 556} 557 558/* 559 * Perform common duties while attaching to interface list 560 */ 561void 562fddi_ifattach(ifp, bpf) 563 struct ifnet *ifp; 564 int bpf; 565{ 566 struct ifaddr *ifa; 567 struct sockaddr_dl *sdl; 568 569 ifp->if_type = IFT_FDDI; 570 ifp->if_addrlen = FDDI_ADDR_LEN; 571 ifp->if_hdrlen = 21; 572 573 if_attach(ifp); /* Must be called before additional assignments */ 574 575 ifp->if_mtu = FDDIMTU; 576 ifp->if_output = fddi_output; 577 ifp->if_input = fddi_input; 578 ifp->if_resolvemulti = fddi_resolvemulti; 579 ifp->if_broadcastaddr = fddibroadcastaddr; 580 ifp->if_baudrate = 100000000; 581#ifdef IFF_NOTRAILERS 582 ifp->if_flags |= IFF_NOTRAILERS; 583#endif 584 ifa = ifaddr_byindex(ifp->if_index); 585 if (ifa == NULL) { 586 if_printf(ifp, "%s() no lladdr!\n", __func__); 587 return; 588 } 589 590 sdl = (struct sockaddr_dl *)ifa->ifa_addr; 591 sdl->sdl_type = IFT_FDDI; 592 sdl->sdl_alen = ifp->if_addrlen; 593 bcopy(IFP2AC(ifp)->ac_enaddr, LLADDR(sdl), ifp->if_addrlen); 594 595 if (bpf) 596 bpfattach(ifp, DLT_FDDI, FDDI_HDR_LEN); 597 598 return; 599} 600 601void 602fddi_ifdetach(ifp, bpf) 603 struct ifnet *ifp; 604 int bpf; 605{ 606 607 if (bpf) 608 bpfdetach(ifp); 609 610 if_detach(ifp); 611 612 return; 613} 614 615int 616fddi_ioctl (ifp, command, data) 617 struct ifnet *ifp; 618 int command; 619 caddr_t data; 620{ 621 struct ifaddr *ifa; 622 struct ifreq *ifr; 623 int error; 624 625 ifa = (struct ifaddr *) data; 626 ifr = (struct ifreq *) data; 627 error = 0; 628 629 switch (command) { 630 case SIOCSIFADDR: 631 ifp->if_flags |= IFF_UP; 632 633 switch (ifa->ifa_addr->sa_family) { 634#ifdef INET 635 case AF_INET: /* before arpwhohas */ 636 ifp->if_init(ifp->if_softc); 637 arp_ifinit(ifp, ifa); 638 break; 639#endif 640#ifdef IPX 641 /* 642 * XXX - This code is probably wrong 643 */ 644 case AF_IPX: { 645 struct ipx_addr *ina; 646 struct arpcom *ac; 647 648 ina = &(IA_SIPX(ifa)->sipx_addr); 649 ac = IFP2AC(ifp); 650 651 if (ipx_nullhost(*ina)) { 652 ina->x_host = *(union ipx_host *) 653 ac->ac_enaddr; 654 } else { 655 bcopy((caddr_t) ina->x_host.c_host, 656 (caddr_t) ac->ac_enaddr, 657 sizeof(ac->ac_enaddr)); 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 case SIOCGIFADDR: { 672 struct sockaddr *sa; 673 674 sa = (struct sockaddr *) & ifr->ifr_data; 675 bcopy(IFP2AC(ifp)->ac_enaddr, 676 (caddr_t) sa->sa_data, FDDI_ADDR_LEN); 677 678 } 679 break; 680 case SIOCSIFMTU: 681 /* 682 * Set the interface MTU. 683 */ 684 if (ifr->ifr_mtu > FDDIMTU) { 685 error = EINVAL; 686 } else { 687 ifp->if_mtu = ifr->ifr_mtu; 688 } 689 break; 690 default: 691 break; 692 } 693 694 return (error); 695} 696 697static int 698fddi_resolvemulti(ifp, llsa, sa) 699 struct ifnet *ifp; 700 struct sockaddr **llsa; 701 struct sockaddr *sa; 702{ 703 struct sockaddr_dl *sdl; 704 struct sockaddr_in *sin; 705#ifdef INET6 706 struct sockaddr_in6 *sin6; 707#endif 708 u_char *e_addr; 709 710 switch(sa->sa_family) { 711 case AF_LINK: 712 /* 713 * No mapping needed. Just check that it's a valid MC address. 714 */ 715 sdl = (struct sockaddr_dl *)sa; 716 e_addr = LLADDR(sdl); 717 if ((e_addr[0] & 1) != 1) 718 return (EADDRNOTAVAIL); 719 *llsa = 0; 720 return (0); 721 722#ifdef INET 723 case AF_INET: 724 sin = (struct sockaddr_in *)sa; 725 if (!IN_MULTICAST(ntohl(sin->sin_addr.s_addr))) 726 return (EADDRNOTAVAIL); 727 MALLOC(sdl, struct sockaddr_dl *, sizeof *sdl, M_IFMADDR, 728 M_WAITOK); 729 sdl->sdl_len = sizeof *sdl; 730 sdl->sdl_family = AF_LINK; 731 sdl->sdl_index = ifp->if_index; 732 sdl->sdl_type = IFT_FDDI; 733 sdl->sdl_nlen = 0; 734 sdl->sdl_alen = FDDI_ADDR_LEN; 735 sdl->sdl_slen = 0; 736 e_addr = LLADDR(sdl); 737 ETHER_MAP_IP_MULTICAST(&sin->sin_addr, e_addr); 738 *llsa = (struct sockaddr *)sdl; 739 return (0); 740#endif 741#ifdef INET6 742 case AF_INET6: 743 sin6 = (struct sockaddr_in6 *)sa; 744 if (IN6_IS_ADDR_UNSPECIFIED(&sin6->sin6_addr)) { 745 /* 746 * An IP6 address of 0 means listen to all 747 * of the Ethernet multicast address used for IP6. 748 * (This is used for multicast routers.) 749 */ 750 ifp->if_flags |= IFF_ALLMULTI; 751 *llsa = 0; 752 return (0); 753 } 754 if (!IN6_IS_ADDR_MULTICAST(&sin6->sin6_addr)) 755 return (EADDRNOTAVAIL); 756 MALLOC(sdl, struct sockaddr_dl *, sizeof *sdl, M_IFMADDR, 757 M_WAITOK); 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