Now available: The Design and Implementation of the FreeBSD Operating System (Second Edition)
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FreeBSD/Linux Kernel Cross Reference
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/5.0/sys/net/if_fddisubr.c 106939 2002-11-15 00:00:15Z sam $ 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_llc.h> 57 #include <net/if_dl.h> 58 #include <net/if_types.h> 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 NS 79 #include <netns/ns.h> 80 #include <netns/ns_if.h> 81 #endif 82 83 #ifdef DECNET 84 #include <netdnet/dn.h> 85 #endif 86 87 #ifdef NETATALK 88 #include <netatalk/at.h> 89 #include <netatalk/at_var.h> 90 #include <netatalk/at_extern.h> 91 92 extern u_char at_org_code[ 3 ]; 93 extern u_char aarp_org_code[ 3 ]; 94 #endif /* NETATALK */ 95 96 static u_char fddibroadcastaddr[FDDI_ADDR_LEN] = 97 { 0xff, 0xff, 0xff, 0xff, 0xff, 0xff }; 98 99 static int fddi_resolvemulti(struct ifnet *, struct sockaddr **, 100 struct sockaddr *); 101 static int fddi_output(struct ifnet *, struct mbuf *, struct sockaddr *, 102 struct rtentry *); 103 static void fddi_input(struct ifnet *ifp, struct mbuf *m); 104 105 106 #define IFP2AC(IFP) ((struct arpcom *)IFP) 107 #define senderr(e) { error = (e); goto bad; } 108 109 /* 110 * FDDI output routine. 111 * Encapsulate a packet of type family for the local net. 112 * Use trailer local net encapsulation if enough data in first 113 * packet leaves a multiple of 512 bytes of data in remainder. 114 * Assumes that ifp is actually pointer to arpcom structure. 115 */ 116 static int 117 fddi_output(ifp, m, dst, rt0) 118 struct ifnet *ifp; 119 struct mbuf *m; 120 struct sockaddr *dst; 121 struct rtentry *rt0; 122 { 123 u_int16_t type; 124 int loop_copy = 0, error = 0, hdrcmplt = 0; 125 u_char esrc[FDDI_ADDR_LEN], edst[FDDI_ADDR_LEN]; 126 struct rtentry *rt; 127 struct fddi_header *fh; 128 struct arpcom *ac = IFP2AC(ifp); 129 130 #ifdef MAC 131 error = mac_check_ifnet_transmit(ifp, m); 132 if (error) 133 senderr(error); 134 #endif 135 136 if ((ifp->if_flags & (IFF_UP|IFF_RUNNING)) != (IFF_UP|IFF_RUNNING)) 137 senderr(ENETDOWN); 138 getmicrotime(&ifp->if_lastchange); 139 if ((rt = rt0) != NULL) { 140 if ((rt->rt_flags & RTF_UP) == 0) { 141 if ((rt0 = rt = rtalloc1(dst, 1, 0UL)) != NULL) 142 rt->rt_refcnt--; 143 else 144 senderr(EHOSTUNREACH); 145 } 146 if (rt->rt_flags & RTF_GATEWAY) { 147 if (rt->rt_gwroute == 0) 148 goto lookup; 149 if (((rt = rt->rt_gwroute)->rt_flags & RTF_UP) == 0) { 150 rtfree(rt); rt = rt0; 151 lookup: rt->rt_gwroute = rtalloc1(rt->rt_gateway, 1, 0UL); 152 if ((rt = rt->rt_gwroute) == 0) 153 senderr(EHOSTUNREACH); 154 } 155 } 156 if (rt->rt_flags & RTF_REJECT) 157 if (rt->rt_rmx.rmx_expire == 0 || 158 time_second < rt->rt_rmx.rmx_expire) 159 senderr(rt == rt0 ? EHOSTDOWN : EHOSTUNREACH); 160 } 161 switch (dst->sa_family) { 162 163 #ifdef INET 164 case AF_INET: { 165 if (!arpresolve(ifp, rt, m, dst, edst, rt0)) 166 return (0); /* if not yet resolved */ 167 type = htons(ETHERTYPE_IP); 168 break; 169 } 170 #endif 171 #ifdef INET6 172 case AF_INET6: 173 if (!nd6_storelladdr(ifp, rt, m, dst, (u_char *)edst)) { 174 /* Something bad happened */ 175 return (0); 176 } 177 type = htons(ETHERTYPE_IPV6); 178 break; 179 #endif 180 #ifdef IPX 181 case AF_IPX: 182 type = htons(ETHERTYPE_IPX); 183 bcopy((caddr_t)&(((struct sockaddr_ipx *)dst)->sipx_addr.x_host), 184 (caddr_t)edst, FDDI_ADDR_LEN); 185 break; 186 #endif 187 #ifdef NETATALK 188 case AF_APPLETALK: { 189 struct at_ifaddr *aa; 190 if (!aarpresolve(ac, m, (struct sockaddr_at *)dst, edst)) 191 return (0); 192 /* 193 * ifaddr is the first thing in at_ifaddr 194 */ 195 if ((aa = at_ifawithnet( (struct sockaddr_at *)dst)) == 0) 196 goto bad; 197 198 /* 199 * In the phase 2 case, we need to prepend an mbuf for the llc header. 200 * Since we must preserve the value of m, which is passed to us by 201 * value, we m_copy() the first mbuf, and use it for our llc header. 202 */ 203 if (aa->aa_flags & AFA_PHASE2) { 204 struct llc llc; 205 206 M_PREPEND(m, LLC_SNAPFRAMELEN, M_TRYWAIT); 207 if (m == 0) 208 senderr(ENOBUFS); 209 llc.llc_dsap = llc.llc_ssap = LLC_SNAP_LSAP; 210 llc.llc_control = LLC_UI; 211 bcopy(at_org_code, llc.llc_snap.org_code, sizeof(at_org_code)); 212 llc.llc_snap.ether_type = htons(ETHERTYPE_AT); 213 bcopy(&llc, mtod(m, caddr_t), LLC_SNAPFRAMELEN); 214 type = 0; 215 } else { 216 type = htons(ETHERTYPE_AT); 217 } 218 break; 219 } 220 #endif /* NETATALK */ 221 #ifdef NS 222 case AF_NS: 223 type = htons(ETHERTYPE_NS); 224 bcopy((caddr_t)&(((struct sockaddr_ns *)dst)->sns_addr.x_host), 225 (caddr_t)edst, FDDI_ADDR_LEN); 226 break; 227 #endif 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] = l->llc_snap.org_code[1] = l->llc_snap.org_code[2] = 0; 300 bcopy((caddr_t)&type, (caddr_t)&l->llc_snap.ether_type, 301 sizeof(u_int16_t)); 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) { 332 struct mbuf *n = m_copy(m, 0, (int)M_COPYALL); 333 334 (void) if_simloop(ifp, 335 n, dst->sa_family, FDDI_HDR_LEN); 336 } else if (bcmp(fh->fddi_dhost, 337 fh->fddi_shost, FDDI_ADDR_LEN) == 0) { 338 (void) if_simloop(ifp, 339 m, dst->sa_family, 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); 347 348 bad: 349 ifp->if_oerrors++; 350 if (m) 351 m_freem(m); 352 return (error); 353 } 354 355 /* 356 * Process a received FDDI packet; 357 * the packet is in the mbuf chain m without 358 * the fddi header, which is provided separately. 359 */ 360 static void 361 fddi_input(ifp, m) 362 struct ifnet *ifp; 363 struct mbuf *m; 364 { 365 struct ifqueue *inq; 366 struct llc *l; 367 struct fddi_header *fh; 368 369 fh = mtod(m, struct fddi_header *); 370 371 /* 372 * Update interface statistics. 373 */ 374 ifp->if_ibytes += m->m_pkthdr.len; 375 getmicrotime(&ifp->if_lastchange); 376 377 /* 378 * Discard packet if interface is not up. 379 */ 380 if ((ifp->if_flags & (IFF_UP|IFF_RUNNING)) != (IFF_UP|IFF_RUNNING)) 381 goto dropanyway; 382 383 #ifdef MAC 384 mac_create_mbuf_from_ifnet(ifp, m); 385 #endif 386 387 /* 388 * Discard non local unicast packets when interface 389 * is in promiscuous mode. 390 */ 391 if ((ifp->if_flags & IFF_PROMISC) && ((fh->fddi_dhost[0] & 1) == 0) && 392 (bcmp(IFP2AC(ifp)->ac_enaddr, (caddr_t)fh->fddi_dhost, 393 FDDI_ADDR_LEN) != 0)) 394 goto dropanyway; 395 396 /* 397 * Set mbuf flags for bcast/mcast. 398 */ 399 if (fh->fddi_dhost[0] & 1) { 400 if (bcmp((caddr_t)ifp->if_broadcastaddr, 401 (caddr_t)fh->fddi_dhost, FDDI_ADDR_LEN) == 0) 402 m->m_flags |= M_BCAST; 403 else 404 m->m_flags |= M_MCAST; 405 ifp->if_imcasts++; 406 } 407 408 #ifdef M_LINK0 409 /* 410 * If this has a LLC priority of 0, then mark it so upper 411 * layers have a hint that it really came via a FDDI/Ethernet 412 * bridge. 413 */ 414 if ((fh->fddi_fc & FDDIFC_LLC_PRIO7) == FDDIFC_LLC_PRIO0) 415 m->m_flags |= M_LINK0; 416 #endif 417 418 /* Strip off FDDI header. */ 419 m_adj(m, sizeof(struct fddi_header)); 420 421 m = m_pullup(m, sizeof(struct llc)); 422 if (m == 0) { 423 ifp->if_ierrors++; 424 goto dropanyway; 425 } 426 l = mtod(m, struct llc *); 427 428 switch (l->llc_dsap) { 429 case LLC_SNAP_LSAP: 430 { 431 u_int16_t type; 432 if (l->llc_control != LLC_UI || l->llc_ssap != LLC_SNAP_LSAP) { 433 ifp->if_noproto++; 434 goto dropanyway; 435 } 436 #ifdef NETATALK 437 if (Bcmp(&(l->llc_snap.org_code)[0], at_org_code, 438 sizeof(at_org_code)) == 0 && 439 ntohs(l->llc_snap.ether_type) == ETHERTYPE_AT) { 440 inq = &atintrq2; 441 m_adj(m, LLC_SNAPFRAMELEN); 442 schednetisr(NETISR_ATALK); 443 break; 444 } 445 446 if (Bcmp(&(l->llc_snap.org_code)[0], aarp_org_code, 447 sizeof(aarp_org_code)) == 0 && 448 ntohs(l->llc_snap.ether_type) == ETHERTYPE_AARP) { 449 m_adj(m, LLC_SNAPFRAMELEN); 450 aarpinput(IFP2AC(ifp), m); /* XXX */ 451 return; 452 } 453 #endif /* NETATALK */ 454 if (l->llc_snap.org_code[0] != 0 || 455 l->llc_snap.org_code[1] != 0 || 456 l->llc_snap.org_code[2] != 0) { 457 ifp->if_noproto++; 458 goto dropanyway; 459 } 460 461 type = ntohs(l->llc_snap.ether_type); 462 m_adj(m, LLC_SNAPFRAMELEN); 463 464 switch (type) { 465 #ifdef INET 466 case ETHERTYPE_IP: 467 if (ipflow_fastforward(m)) 468 return; 469 schednetisr(NETISR_IP); 470 inq = &ipintrq; 471 break; 472 473 case ETHERTYPE_ARP: 474 if (ifp->if_flags & IFF_NOARP) 475 goto dropanyway; 476 schednetisr(NETISR_ARP); 477 inq = &arpintrq; 478 break; 479 #endif 480 #ifdef INET6 481 case ETHERTYPE_IPV6: 482 schednetisr(NETISR_IPV6); 483 inq = &ip6intrq; 484 break; 485 #endif 486 #ifdef IPX 487 case ETHERTYPE_IPX: 488 schednetisr(NETISR_IPX); 489 inq = &ipxintrq; 490 break; 491 #endif 492 #ifdef NS 493 case ETHERTYPE_NS: 494 schednetisr(NETISR_NS); 495 inq = &nsintrq; 496 break; 497 #endif 498 #ifdef DECNET 499 case ETHERTYPE_DECNET: 500 schednetisr(NETISR_DECNET); 501 inq = &decnetintrq; 502 break; 503 #endif 504 #ifdef NETATALK 505 case ETHERTYPE_AT: 506 schednetisr(NETISR_ATALK); 507 inq = &atintrq1; 508 break; 509 case ETHERTYPE_AARP: 510 /* probably this should be done with a NETISR as well */ 511 aarpinput(IFP2AC(ifp), m); /* XXX */ 512 return; 513 #endif /* NETATALK */ 514 default: 515 /* printf("fddi_input: unknown protocol 0x%x\n", type); */ 516 ifp->if_noproto++; 517 goto dropanyway; 518 } 519 break; 520 } 521 522 default: 523 /* printf("fddi_input: unknown dsap 0x%x\n", l->llc_dsap); */ 524 ifp->if_noproto++; 525 goto dropanyway; 526 } 527 528 (void) IF_HANDOFF(inq, m, NULL); 529 return; 530 531 dropanyway: 532 ifp->if_iqdrops++; 533 if (m) 534 m_freem(m); 535 return; 536 } 537 538 /* 539 * Perform common duties while attaching to interface list 540 */ 541 void 542 fddi_ifattach(ifp, bpf) 543 struct ifnet *ifp; 544 int bpf; 545 { 546 struct ifaddr *ifa; 547 struct sockaddr_dl *sdl; 548 549 ifp->if_type = IFT_FDDI; 550 ifp->if_addrlen = FDDI_ADDR_LEN; 551 ifp->if_hdrlen = 21; 552 553 if_attach(ifp); /* Must be called before additional assignments */ 554 555 ifp->if_mtu = FDDIMTU; 556 ifp->if_output = fddi_output; 557 ifp->if_input = fddi_input; 558 ifp->if_resolvemulti = fddi_resolvemulti; 559 ifp->if_broadcastaddr = fddibroadcastaddr; 560 ifp->if_baudrate = 100000000; 561 #ifdef IFF_NOTRAILERS 562 ifp->if_flags |= IFF_NOTRAILERS; 563 #endif 564 ifa = ifaddr_byindex(ifp->if_index); 565 if (ifa == NULL) { 566 printf("%s(): no lladdr for %s%d!\n", __FUNCTION__, 567 ifp->if_name, ifp->if_unit); 568 return; 569 } 570 571 sdl = (struct sockaddr_dl *)ifa->ifa_addr; 572 sdl->sdl_type = IFT_FDDI; 573 sdl->sdl_alen = ifp->if_addrlen; 574 bcopy(IFP2AC(ifp)->ac_enaddr, LLADDR(sdl), ifp->if_addrlen); 575 576 if (bpf) 577 bpfattach(ifp, DLT_FDDI, FDDI_HDR_LEN); 578 579 return; 580 } 581 582 void 583 fddi_ifdetach(ifp, bpf) 584 struct ifnet *ifp; 585 int bpf; 586 { 587 588 if (bpf) 589 bpfdetach(ifp); 590 591 if_detach(ifp); 592 593 return; 594 } 595 596 int 597 fddi_ioctl (ifp, command, data) 598 struct ifnet *ifp; 599 int command; 600 caddr_t data; 601 { 602 struct ifaddr *ifa; 603 struct ifreq *ifr; 604 int error; 605 606 ifa = (struct ifaddr *) data; 607 ifr = (struct ifreq *) data; 608 error = 0; 609 610 switch (command) { 611 case SIOCSIFADDR: 612 ifp->if_flags |= IFF_UP; 613 614 switch (ifa->ifa_addr->sa_family) { 615 #ifdef INET 616 case AF_INET: /* before arpwhohas */ 617 ifp->if_init(ifp->if_softc); 618 arp_ifinit(ifp, ifa); 619 break; 620 #endif 621 #ifdef IPX 622 /* 623 * XXX - This code is probably wrong 624 */ 625 case AF_IPX: { 626 struct ipx_addr *ina; 627 struct arpcom *ac; 628 629 ina = &(IA_SIPX(ifa)->sipx_addr); 630 ac = IFP2AC(ifp); 631 632 if (ipx_nullhost(*ina)) { 633 ina->x_host = *(union ipx_host *) 634 ac->ac_enaddr; 635 } else { 636 bcopy((caddr_t) ina->x_host.c_host, 637 (caddr_t) ac->ac_enaddr, 638 sizeof(ac->ac_enaddr)); 639 } 640 641 /* 642 * Set new address 643 */ 644 ifp->if_init(ifp->if_softc); 645 } 646 break; 647 #endif 648 default: 649 ifp->if_init(ifp->if_softc); 650 break; 651 } 652 case SIOCGIFADDR: { 653 struct sockaddr *sa; 654 655 sa = (struct sockaddr *) & ifr->ifr_data; 656 bcopy(IFP2AC(ifp)->ac_enaddr, 657 (caddr_t) sa->sa_data, FDDI_ADDR_LEN); 658 659 } 660 break; 661 case SIOCSIFMTU: 662 /* 663 * Set the interface MTU. 664 */ 665 if (ifr->ifr_mtu > FDDIMTU) { 666 error = EINVAL; 667 } else { 668 ifp->if_mtu = ifr->ifr_mtu; 669 } 670 break; 671 default: 672 break; 673 } 674 675 return (error); 676 } 677 678 static int 679 fddi_resolvemulti(ifp, llsa, sa) 680 struct ifnet *ifp; 681 struct sockaddr **llsa; 682 struct sockaddr *sa; 683 { 684 struct sockaddr_dl *sdl; 685 struct sockaddr_in *sin; 686 #ifdef INET6 687 struct sockaddr_in6 *sin6; 688 #endif 689 u_char *e_addr; 690 691 switch(sa->sa_family) { 692 case AF_LINK: 693 /* 694 * No mapping needed. Just check that it's a valid MC address. 695 */ 696 sdl = (struct sockaddr_dl *)sa; 697 e_addr = LLADDR(sdl); 698 if ((e_addr[0] & 1) != 1) 699 return (EADDRNOTAVAIL); 700 *llsa = 0; 701 return (0); 702 703 #ifdef INET 704 case AF_INET: 705 sin = (struct sockaddr_in *)sa; 706 if (!IN_MULTICAST(ntohl(sin->sin_addr.s_addr))) 707 return (EADDRNOTAVAIL); 708 MALLOC(sdl, struct sockaddr_dl *, sizeof *sdl, M_IFMADDR, 709 M_WAITOK); 710 sdl->sdl_len = sizeof *sdl; 711 sdl->sdl_family = AF_LINK; 712 sdl->sdl_index = ifp->if_index; 713 sdl->sdl_type = IFT_FDDI; 714 sdl->sdl_nlen = 0; 715 sdl->sdl_alen = FDDI_ADDR_LEN; 716 sdl->sdl_slen = 0; 717 e_addr = LLADDR(sdl); 718 ETHER_MAP_IP_MULTICAST(&sin->sin_addr, e_addr); 719 *llsa = (struct sockaddr *)sdl; 720 return (0); 721 #endif 722 #ifdef INET6 723 case AF_INET6: 724 sin6 = (struct sockaddr_in6 *)sa; 725 if (IN6_IS_ADDR_UNSPECIFIED(&sin6->sin6_addr)) { 726 /* 727 * An IP6 address of 0 means listen to all 728 * of the Ethernet multicast address used for IP6. 729 * (This is used for multicast routers.) 730 */ 731 ifp->if_flags |= IFF_ALLMULTI; 732 *llsa = 0; 733 return (0); 734 } 735 if (!IN6_IS_ADDR_MULTICAST(&sin6->sin6_addr)) 736 return (EADDRNOTAVAIL); 737 MALLOC(sdl, struct sockaddr_dl *, sizeof *sdl, M_IFMADDR, 738 M_WAITOK); 739 sdl->sdl_len = sizeof *sdl; 740 sdl->sdl_family = AF_LINK; 741 sdl->sdl_index = ifp->if_index; 742 sdl->sdl_type = IFT_FDDI; 743 sdl->sdl_nlen = 0; 744 sdl->sdl_alen = FDDI_ADDR_LEN; 745 sdl->sdl_slen = 0; 746 e_addr = LLADDR(sdl); 747 ETHER_MAP_IPV6_MULTICAST(&sin6->sin6_addr, e_addr); 748 *llsa = (struct sockaddr *)sdl; 749 return (0); 750 #endif 751 752 default: 753 /* 754 * Well, the text isn't quite right, but it's the name 755 * that counts... 756 */ 757 return (EAFNOSUPPORT); 758 } 759 760 return (0); 761 } 762 763 static moduledata_t fddi_mod = { 764 "fddi", /* module name */ 765 NULL, /* event handler */ 766 0 /* extra data */ 767 }; 768 769 DECLARE_MODULE(fddi, fddi_mod, SI_SUB_PSEUDO, SI_ORDER_ANY); 770 MODULE_VERSION(fddi, 1);
Cache object: f2ddabf4a396564857541dc0b0e021da
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