Now available: The Design and Implementation of the FreeBSD Operating System (Second Edition)
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sys/net/if_fddisubr.c
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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: releng/5.4/sys/net/if_fddisubr.c 145335 2005-04-20 19:11:07Z cvs2svn $ 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 88 extern u_char at_org_code[ 3 ]; 89 extern u_char aarp_org_code[ 3 ]; 90 #endif /* NETATALK */ 91 92 static const u_char fddibroadcastaddr[FDDI_ADDR_LEN] = 93 { 0xff, 0xff, 0xff, 0xff, 0xff, 0xff }; 94 95 static int fddi_resolvemulti(struct ifnet *, struct sockaddr **, 96 struct sockaddr *); 97 static int fddi_output(struct ifnet *, struct mbuf *, struct sockaddr *, 98 struct rtentry *); 99 static void fddi_input(struct ifnet *ifp, struct mbuf *m); 100 101 #define senderr(e) do { error = (e); goto bad; } while (0) 102 103 /* 104 * FDDI output routine. 105 * Encapsulate a packet of type family for the local net. 106 * Use trailer local net encapsulation if enough data in first 107 * packet leaves a multiple of 512 bytes of data in remainder. 108 * Assumes that ifp is actually pointer to arpcom structure. 109 */ 110 static int 111 fddi_output(ifp, m, dst, rt0) 112 struct ifnet *ifp; 113 struct mbuf *m; 114 struct sockaddr *dst; 115 struct rtentry *rt0; 116 { 117 u_int16_t type; 118 int loop_copy = 0, error = 0, hdrcmplt = 0; 119 u_char esrc[FDDI_ADDR_LEN], edst[FDDI_ADDR_LEN]; 120 struct fddi_header *fh; 121 122 #ifdef MAC 123 error = mac_check_ifnet_transmit(ifp, m); 124 if (error) 125 senderr(error); 126 #endif 127 128 if (ifp->if_flags & IFF_MONITOR) 129 senderr(ENETDOWN); 130 if ((ifp->if_flags & (IFF_UP|IFF_RUNNING)) != (IFF_UP|IFF_RUNNING)) 131 senderr(ENETDOWN); 132 getmicrotime(&ifp->if_lastchange); 133 134 switch (dst->sa_family) { 135 #ifdef INET 136 case AF_INET: { 137 error = arpresolve(ifp, rt0, m, dst, edst); 138 if (error) 139 return (error == EWOULDBLOCK ? 0 : error); 140 type = htons(ETHERTYPE_IP); 141 break; 142 } 143 case AF_ARP: 144 { 145 struct arphdr *ah; 146 ah = mtod(m, struct arphdr *); 147 ah->ar_hrd = htons(ARPHRD_ETHER); 148 149 loop_copy = -1; /* if this is for us, don't do it */ 150 151 switch (ntohs(ah->ar_op)) { 152 case ARPOP_REVREQUEST: 153 case ARPOP_REVREPLY: 154 type = htons(ETHERTYPE_REVARP); 155 break; 156 case ARPOP_REQUEST: 157 case ARPOP_REPLY: 158 default: 159 type = htons(ETHERTYPE_ARP); 160 break; 161 } 162 163 if (m->m_flags & M_BCAST) 164 bcopy(ifp->if_broadcastaddr, edst, FDDI_ADDR_LEN); 165 else 166 bcopy(ar_tha(ah), edst, FDDI_ADDR_LEN); 167 168 } 169 break; 170 #endif /* INET */ 171 #ifdef INET6 172 case AF_INET6: 173 error = nd6_storelladdr(ifp, rt0, m, dst, (u_char *)edst); 174 if (error) 175 return (error); /* Something bad happened */ 176 type = htons(ETHERTYPE_IPV6); 177 break; 178 #endif /* INET6 */ 179 #ifdef IPX 180 case AF_IPX: 181 type = htons(ETHERTYPE_IPX); 182 bcopy((caddr_t)&(((struct sockaddr_ipx *)dst)->sipx_addr.x_host), 183 (caddr_t)edst, FDDI_ADDR_LEN); 184 break; 185 #endif /* IPX */ 186 #ifdef NETATALK 187 case AF_APPLETALK: { 188 struct at_ifaddr *aa; 189 if (!aarpresolve(ifp, m, (struct sockaddr_at *)dst, edst)) 190 return (0); 191 /* 192 * ifaddr is the first thing in at_ifaddr 193 */ 194 if ((aa = at_ifawithnet( (struct sockaddr_at *)dst)) == 0) 195 goto bad; 196 197 /* 198 * In the phase 2 case, we need to prepend an mbuf for the llc header. 199 * Since we must preserve the value of m, which is passed to us by 200 * value, we m_copy() the first mbuf, and use it for our llc header. 201 */ 202 if (aa->aa_flags & AFA_PHASE2) { 203 struct llc llc; 204 205 M_PREPEND(m, LLC_SNAPFRAMELEN, M_TRYWAIT); 206 if (m == 0) 207 senderr(ENOBUFS); 208 llc.llc_dsap = llc.llc_ssap = LLC_SNAP_LSAP; 209 llc.llc_control = LLC_UI; 210 bcopy(at_org_code, llc.llc_snap.org_code, sizeof(at_org_code)); 211 llc.llc_snap.ether_type = htons(ETHERTYPE_AT); 212 bcopy(&llc, mtod(m, caddr_t), LLC_SNAPFRAMELEN); 213 type = 0; 214 } else { 215 type = htons(ETHERTYPE_AT); 216 } 217 break; 218 } 219 #endif /* NETATALK */ 220 221 case pseudo_AF_HDRCMPLT: 222 { 223 struct ether_header *eh; 224 hdrcmplt = 1; 225 eh = (struct ether_header *)dst->sa_data; 226 bcopy((caddr_t)eh->ether_shost, (caddr_t)esrc, FDDI_ADDR_LEN); 227 /* FALLTHROUGH */ 228 } 229 230 case AF_UNSPEC: 231 { 232 struct ether_header *eh; 233 loop_copy = -1; 234 eh = (struct ether_header *)dst->sa_data; 235 bcopy((caddr_t)eh->ether_dhost, (caddr_t)edst, FDDI_ADDR_LEN); 236 if (*edst & 1) 237 m->m_flags |= (M_BCAST|M_MCAST); 238 type = eh->ether_type; 239 break; 240 } 241 242 case AF_IMPLINK: 243 { 244 fh = mtod(m, struct fddi_header *); 245 error = EPROTONOSUPPORT; 246 switch (fh->fddi_fc & (FDDIFC_C|FDDIFC_L|FDDIFC_F)) { 247 case FDDIFC_LLC_ASYNC: { 248 /* legal priorities are 0 through 7 */ 249 if ((fh->fddi_fc & FDDIFC_Z) > 7) 250 goto bad; 251 break; 252 } 253 case FDDIFC_LLC_SYNC: { 254 /* FDDIFC_Z bits reserved, must be zero */ 255 if (fh->fddi_fc & FDDIFC_Z) 256 goto bad; 257 break; 258 } 259 case FDDIFC_SMT: { 260 /* FDDIFC_Z bits must be non zero */ 261 if ((fh->fddi_fc & FDDIFC_Z) == 0) 262 goto bad; 263 break; 264 } 265 default: { 266 /* anything else is too dangerous */ 267 goto bad; 268 } 269 } 270 error = 0; 271 if (fh->fddi_dhost[0] & 1) 272 m->m_flags |= (M_BCAST|M_MCAST); 273 goto queue_it; 274 } 275 default: 276 if_printf(ifp, "can't handle af%d\n", dst->sa_family); 277 senderr(EAFNOSUPPORT); 278 } 279 280 /* 281 * Add LLC header. 282 */ 283 if (type != 0) { 284 struct llc *l; 285 M_PREPEND(m, LLC_SNAPFRAMELEN, M_DONTWAIT); 286 if (m == 0) 287 senderr(ENOBUFS); 288 l = mtod(m, struct llc *); 289 l->llc_control = LLC_UI; 290 l->llc_dsap = l->llc_ssap = LLC_SNAP_LSAP; 291 l->llc_snap.org_code[0] = 292 l->llc_snap.org_code[1] = 293 l->llc_snap.org_code[2] = 0; 294 l->llc_snap.ether_type = htons(type); 295 } 296 297 /* 298 * Add local net header. If no space in first mbuf, 299 * allocate another. 300 */ 301 M_PREPEND(m, FDDI_HDR_LEN, M_DONTWAIT); 302 if (m == 0) 303 senderr(ENOBUFS); 304 fh = mtod(m, struct fddi_header *); 305 fh->fddi_fc = FDDIFC_LLC_ASYNC|FDDIFC_LLC_PRIO4; 306 bcopy((caddr_t)edst, (caddr_t)fh->fddi_dhost, FDDI_ADDR_LEN); 307 queue_it: 308 if (hdrcmplt) 309 bcopy((caddr_t)esrc, (caddr_t)fh->fddi_shost, FDDI_ADDR_LEN); 310 else 311 bcopy(IFP2AC(ifp)->ac_enaddr, (caddr_t)fh->fddi_shost, 312 FDDI_ADDR_LEN); 313 314 /* 315 * If a simplex interface, and the packet is being sent to our 316 * Ethernet address or a broadcast address, loopback a copy. 317 * XXX To make a simplex device behave exactly like a duplex 318 * device, we should copy in the case of sending to our own 319 * ethernet address (thus letting the original actually appear 320 * on the wire). However, we don't do that here for security 321 * reasons and compatibility with the original behavior. 322 */ 323 if ((ifp->if_flags & IFF_SIMPLEX) && (loop_copy != -1)) { 324 if ((m->m_flags & M_BCAST) || (loop_copy > 0)) { 325 struct mbuf *n; 326 n = m_copy(m, 0, (int)M_COPYALL); 327 (void) if_simloop(ifp, n, dst->sa_family, 328 FDDI_HDR_LEN); 329 } else if (bcmp(fh->fddi_dhost, fh->fddi_shost, 330 FDDI_ADDR_LEN) == 0) { 331 (void) if_simloop(ifp, m, dst->sa_family, 332 FDDI_HDR_LEN); 333 return (0); /* XXX */ 334 } 335 } 336 337 IFQ_HANDOFF(ifp, m, error); 338 if (error) 339 ifp->if_oerrors++; 340 341 return (error); 342 343 bad: 344 ifp->if_oerrors++; 345 if (m) 346 m_freem(m); 347 return (error); 348 } 349 350 /* 351 * Process a received FDDI packet. 352 */ 353 static void 354 fddi_input(ifp, m) 355 struct ifnet *ifp; 356 struct mbuf *m; 357 { 358 int isr; 359 struct llc *l; 360 struct fddi_header *fh; 361 362 /* 363 * Do consistency checks to verify assumptions 364 * made by code past this point. 365 */ 366 if ((m->m_flags & M_PKTHDR) == 0) { 367 if_printf(ifp, "discard frame w/o packet header\n"); 368 ifp->if_ierrors++; 369 m_freem(m); 370 return; 371 } 372 if (m->m_pkthdr.rcvif == NULL) { 373 if_printf(ifp, "discard frame w/o interface pointer\n"); 374 ifp->if_ierrors++; 375 m_freem(m); 376 return; 377 } 378 379 m = m_pullup(m, FDDI_HDR_LEN); 380 if (m == NULL) { 381 ifp->if_ierrors++; 382 goto dropanyway; 383 } 384 fh = mtod(m, struct fddi_header *); 385 m->m_pkthdr.header = (void *)fh; 386 387 /* 388 * Discard packet if interface is not up. 389 */ 390 if ((ifp->if_flags & (IFF_UP|IFF_RUNNING)) != (IFF_UP|IFF_RUNNING)) 391 goto dropanyway; 392 393 /* 394 * Give bpf a chance at the packet. 395 */ 396 BPF_MTAP(ifp, m); 397 398 /* 399 * Interface marked for monitoring; discard packet. 400 */ 401 if (ifp->if_flags & IFF_MONITOR) { 402 m_freem(m); 403 return; 404 } 405 406 #ifdef MAC 407 mac_create_mbuf_from_ifnet(ifp, m); 408 #endif 409 410 /* 411 * Update interface statistics. 412 */ 413 ifp->if_ibytes += m->m_pkthdr.len; 414 getmicrotime(&ifp->if_lastchange); 415 416 /* 417 * Discard non local unicast packets when interface 418 * is in promiscuous mode. 419 */ 420 if ((ifp->if_flags & IFF_PROMISC) && ((fh->fddi_dhost[0] & 1) == 0) && 421 (bcmp(IFP2AC(ifp)->ac_enaddr, (caddr_t)fh->fddi_dhost, 422 FDDI_ADDR_LEN) != 0)) 423 goto dropanyway; 424 425 /* 426 * Set mbuf flags for bcast/mcast. 427 */ 428 if (fh->fddi_dhost[0] & 1) { 429 if (bcmp(ifp->if_broadcastaddr, fh->fddi_dhost, 430 FDDI_ADDR_LEN) == 0) 431 m->m_flags |= M_BCAST; 432 else 433 m->m_flags |= M_MCAST; 434 ifp->if_imcasts++; 435 } 436 437 #ifdef M_LINK0 438 /* 439 * If this has a LLC priority of 0, then mark it so upper 440 * layers have a hint that it really came via a FDDI/Ethernet 441 * bridge. 442 */ 443 if ((fh->fddi_fc & FDDIFC_LLC_PRIO7) == FDDIFC_LLC_PRIO0) 444 m->m_flags |= M_LINK0; 445 #endif 446 447 /* Strip off FDDI header. */ 448 m_adj(m, FDDI_HDR_LEN); 449 450 m = m_pullup(m, LLC_SNAPFRAMELEN); 451 if (m == 0) { 452 ifp->if_ierrors++; 453 goto dropanyway; 454 } 455 l = mtod(m, struct llc *); 456 457 switch (l->llc_dsap) { 458 case LLC_SNAP_LSAP: 459 { 460 u_int16_t type; 461 if ((l->llc_control != LLC_UI) || 462 (l->llc_ssap != LLC_SNAP_LSAP)) { 463 ifp->if_noproto++; 464 goto dropanyway; 465 } 466 #ifdef NETATALK 467 if (bcmp(&(l->llc_snap.org_code)[0], at_org_code, 468 sizeof(at_org_code)) == 0 && 469 ntohs(l->llc_snap.ether_type) == ETHERTYPE_AT) { 470 isr = NETISR_ATALK2; 471 m_adj(m, LLC_SNAPFRAMELEN); 472 break; 473 } 474 475 if (bcmp(&(l->llc_snap.org_code)[0], aarp_org_code, 476 sizeof(aarp_org_code)) == 0 && 477 ntohs(l->llc_snap.ether_type) == ETHERTYPE_AARP) { 478 m_adj(m, LLC_SNAPFRAMELEN); 479 isr = NETISR_AARP; 480 break; 481 } 482 #endif /* NETATALK */ 483 if (l->llc_snap.org_code[0] != 0 || 484 l->llc_snap.org_code[1] != 0 || 485 l->llc_snap.org_code[2] != 0) { 486 ifp->if_noproto++; 487 goto dropanyway; 488 } 489 490 type = ntohs(l->llc_snap.ether_type); 491 m_adj(m, LLC_SNAPFRAMELEN); 492 493 switch (type) { 494 #ifdef INET 495 case ETHERTYPE_IP: 496 if (ip_fastforward(m)) 497 return; 498 isr = NETISR_IP; 499 break; 500 501 case ETHERTYPE_ARP: 502 if (ifp->if_flags & IFF_NOARP) 503 goto dropanyway; 504 isr = NETISR_ARP; 505 break; 506 #endif 507 #ifdef INET6 508 case ETHERTYPE_IPV6: 509 isr = NETISR_IPV6; 510 break; 511 #endif 512 #ifdef IPX 513 case ETHERTYPE_IPX: 514 isr = NETISR_IPX; 515 break; 516 #endif 517 #ifdef DECNET 518 case ETHERTYPE_DECNET: 519 isr = NETISR_DECNET; 520 break; 521 #endif 522 #ifdef NETATALK 523 case ETHERTYPE_AT: 524 isr = NETISR_ATALK1; 525 break; 526 case ETHERTYPE_AARP: 527 isr = NETISR_AARP; 528 break; 529 #endif /* NETATALK */ 530 default: 531 /* printf("fddi_input: unknown protocol 0x%x\n", type); */ 532 ifp->if_noproto++; 533 goto dropanyway; 534 } 535 break; 536 } 537 538 default: 539 /* printf("fddi_input: unknown dsap 0x%x\n", l->llc_dsap); */ 540 ifp->if_noproto++; 541 goto dropanyway; 542 } 543 netisr_dispatch(isr, m); 544 return; 545 546 dropanyway: 547 ifp->if_iqdrops++; 548 if (m) 549 m_freem(m); 550 return; 551 } 552 553 /* 554 * Perform common duties while attaching to interface list 555 */ 556 void 557 fddi_ifattach(ifp, bpf) 558 struct ifnet *ifp; 559 int bpf; 560 { 561 struct ifaddr *ifa; 562 struct sockaddr_dl *sdl; 563 564 ifp->if_type = IFT_FDDI; 565 ifp->if_addrlen = FDDI_ADDR_LEN; 566 ifp->if_hdrlen = 21; 567 568 if_attach(ifp); /* Must be called before additional assignments */ 569 570 ifp->if_mtu = FDDIMTU; 571 ifp->if_output = fddi_output; 572 ifp->if_input = fddi_input; 573 ifp->if_resolvemulti = fddi_resolvemulti; 574 ifp->if_broadcastaddr = fddibroadcastaddr; 575 ifp->if_baudrate = 100000000; 576 #ifdef IFF_NOTRAILERS 577 ifp->if_flags |= IFF_NOTRAILERS; 578 #endif 579 ifa = ifaddr_byindex(ifp->if_index); 580 if (ifa == NULL) { 581 if_printf(ifp, "%s() no lladdr!\n", __func__); 582 return; 583 } 584 585 sdl = (struct sockaddr_dl *)ifa->ifa_addr; 586 sdl->sdl_type = IFT_FDDI; 587 sdl->sdl_alen = ifp->if_addrlen; 588 bcopy(IFP2AC(ifp)->ac_enaddr, LLADDR(sdl), ifp->if_addrlen); 589 590 if (bpf) 591 bpfattach(ifp, DLT_FDDI, FDDI_HDR_LEN); 592 593 return; 594 } 595 596 void 597 fddi_ifdetach(ifp, bpf) 598 struct ifnet *ifp; 599 int bpf; 600 { 601 602 if (bpf) 603 bpfdetach(ifp); 604 605 if_detach(ifp); 606 607 return; 608 } 609 610 int 611 fddi_ioctl (ifp, command, data) 612 struct ifnet *ifp; 613 int command; 614 caddr_t data; 615 { 616 struct ifaddr *ifa; 617 struct ifreq *ifr; 618 int error; 619 620 ifa = (struct ifaddr *) data; 621 ifr = (struct ifreq *) data; 622 error = 0; 623 624 switch (command) { 625 case SIOCSIFADDR: 626 ifp->if_flags |= IFF_UP; 627 628 switch (ifa->ifa_addr->sa_family) { 629 #ifdef INET 630 case AF_INET: /* before arpwhohas */ 631 ifp->if_init(ifp->if_softc); 632 arp_ifinit(ifp, ifa); 633 break; 634 #endif 635 #ifdef IPX 636 /* 637 * XXX - This code is probably wrong 638 */ 639 case AF_IPX: { 640 struct ipx_addr *ina; 641 struct arpcom *ac; 642 643 ina = &(IA_SIPX(ifa)->sipx_addr); 644 ac = IFP2AC(ifp); 645 646 if (ipx_nullhost(*ina)) { 647 ina->x_host = *(union ipx_host *) 648 ac->ac_enaddr; 649 } else { 650 bcopy((caddr_t) ina->x_host.c_host, 651 (caddr_t) ac->ac_enaddr, 652 sizeof(ac->ac_enaddr)); 653 } 654 655 /* 656 * Set new address 657 */ 658 ifp->if_init(ifp->if_softc); 659 } 660 break; 661 #endif 662 default: 663 ifp->if_init(ifp->if_softc); 664 break; 665 } 666 case SIOCGIFADDR: { 667 struct sockaddr *sa; 668 669 sa = (struct sockaddr *) & ifr->ifr_data; 670 bcopy(IFP2AC(ifp)->ac_enaddr, 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 break; 687 } 688 689 return (error); 690 } 691 692 static int 693 fddi_resolvemulti(ifp, llsa, sa) 694 struct ifnet *ifp; 695 struct sockaddr **llsa; 696 struct sockaddr *sa; 697 { 698 struct sockaddr_dl *sdl; 699 struct sockaddr_in *sin; 700 #ifdef INET6 701 struct sockaddr_in6 *sin6; 702 #endif 703 u_char *e_addr; 704 705 switch(sa->sa_family) { 706 case AF_LINK: 707 /* 708 * No mapping needed. Just check that it's a valid MC address. 709 */ 710 sdl = (struct sockaddr_dl *)sa; 711 e_addr = LLADDR(sdl); 712 if ((e_addr[0] & 1) != 1) 713 return (EADDRNOTAVAIL); 714 *llsa = 0; 715 return (0); 716 717 #ifdef INET 718 case AF_INET: 719 sin = (struct sockaddr_in *)sa; 720 if (!IN_MULTICAST(ntohl(sin->sin_addr.s_addr))) 721 return (EADDRNOTAVAIL); 722 MALLOC(sdl, struct sockaddr_dl *, sizeof *sdl, M_IFMADDR, 723 M_WAITOK); 724 sdl->sdl_len = sizeof *sdl; 725 sdl->sdl_family = AF_LINK; 726 sdl->sdl_index = ifp->if_index; 727 sdl->sdl_type = IFT_FDDI; 728 sdl->sdl_nlen = 0; 729 sdl->sdl_alen = FDDI_ADDR_LEN; 730 sdl->sdl_slen = 0; 731 e_addr = LLADDR(sdl); 732 ETHER_MAP_IP_MULTICAST(&sin->sin_addr, e_addr); 733 *llsa = (struct sockaddr *)sdl; 734 return (0); 735 #endif 736 #ifdef INET6 737 case AF_INET6: 738 sin6 = (struct sockaddr_in6 *)sa; 739 if (IN6_IS_ADDR_UNSPECIFIED(&sin6->sin6_addr)) { 740 /* 741 * An IP6 address of 0 means listen to all 742 * of the Ethernet multicast address used for IP6. 743 * (This is used for multicast routers.) 744 */ 745 ifp->if_flags |= IFF_ALLMULTI; 746 *llsa = 0; 747 return (0); 748 } 749 if (!IN6_IS_ADDR_MULTICAST(&sin6->sin6_addr)) 750 return (EADDRNOTAVAIL); 751 MALLOC(sdl, struct sockaddr_dl *, sizeof *sdl, M_IFMADDR, 752 M_WAITOK); 753 sdl->sdl_len = sizeof *sdl; 754 sdl->sdl_family = AF_LINK; 755 sdl->sdl_index = ifp->if_index; 756 sdl->sdl_type = IFT_FDDI; 757 sdl->sdl_nlen = 0; 758 sdl->sdl_alen = FDDI_ADDR_LEN; 759 sdl->sdl_slen = 0; 760 e_addr = LLADDR(sdl); 761 ETHER_MAP_IPV6_MULTICAST(&sin6->sin6_addr, e_addr); 762 *llsa = (struct sockaddr *)sdl; 763 return (0); 764 #endif 765 766 default: 767 /* 768 * Well, the text isn't quite right, but it's the name 769 * that counts... 770 */ 771 return (EAFNOSUPPORT); 772 } 773 774 return (0); 775 } 776 777 static moduledata_t fddi_mod = { 778 "fddi", /* module name */ 779 NULL, /* event handler */ 780 0 /* extra data */ 781 }; 782 783 DECLARE_MODULE(fddi, fddi_mod, SI_SUB_PSEUDO, SI_ORDER_ANY); 784 MODULE_VERSION(fddi, 1);
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