1 /* $OpenBSD: interface.c,v 1.6 2007/11/24 16:35:16 claudio Exp $ */ 2 3 /* 4 * Copyright (c) 2005 Claudio Jeker <claudio@openbsd.org> 5 * Copyright (c) 2004, 2005, 2007 Esben Norby <norby@openbsd.org> 6 * 7 * Permission to use, copy, modify, and distribute this software for any 8 * purpose with or without fee is hereby granted, provided that the above 9 * copyright notice and this permission notice appear in all copies. 10 * 11 * THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES 12 * WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF 13 * MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR 14 * ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES 15 * WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN 16 * ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF 17 * OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE. 18 */ 19 20 #include <sys/types.h> 21 #include <sys/ioctl.h> 22 #include <sys/time.h> 23 #include <sys/socket.h> 24 #include <netinet/in.h> 25 #include <arpa/inet.h> 26 #include <net/if.h> 27 #include <net/if_types.h> 28 #include <ctype.h> 29 #include <err.h> 30 #include <stddef.h> 31 #include <stdio.h> 32 #include <stdlib.h> 33 #include <unistd.h> 34 #include <string.h> 35 #include <event.h> 36 37 #include "ospf6d.h" 38 #include "ospf6.h" 39 #include "log.h" 40 #include "ospfe.h" 41 42 void if_hello_timer(int, short, void *); 43 void if_start_hello_timer(struct iface *); 44 void if_stop_hello_timer(struct iface *); 45 void if_stop_wait_timer(struct iface *); 46 void if_wait_timer(int, short, void *); 47 void if_start_wait_timer(struct iface *); 48 void if_stop_wait_timer(struct iface *); 49 struct nbr *if_elect(struct nbr *, struct nbr *); 50 51 struct { 52 int state; 53 enum iface_event event; 54 enum iface_action action; 55 int new_state; 56 } iface_fsm[] = { 57 /* current state event that happened action to take resulting state */ 58 {IF_STA_DOWN, IF_EVT_UP, IF_ACT_STRT, 0}, 59 {IF_STA_WAITING, IF_EVT_BACKUP_SEEN, IF_ACT_ELECT, 0}, 60 {IF_STA_WAITING, IF_EVT_WTIMER, IF_ACT_ELECT, 0}, 61 {IF_STA_ANY, IF_EVT_WTIMER, IF_ACT_NOTHING, 0}, 62 {IF_STA_WAITING, IF_EVT_NBR_CHNG, IF_ACT_NOTHING, 0}, 63 {IF_STA_MULTI, IF_EVT_NBR_CHNG, IF_ACT_ELECT, 0}, 64 {IF_STA_ANY, IF_EVT_NBR_CHNG, IF_ACT_NOTHING, 0}, 65 {IF_STA_ANY, IF_EVT_DOWN, IF_ACT_RST, IF_STA_DOWN}, 66 {IF_STA_ANY, IF_EVT_LOOP, IF_ACT_RST, IF_STA_LOOPBACK}, 67 {IF_STA_LOOPBACK, IF_EVT_UNLOOP, IF_ACT_NOTHING, IF_STA_DOWN}, 68 {-1, IF_EVT_NOTHING, IF_ACT_NOTHING, 0}, 69 }; 70 71 static int vlink_cnt = 0; 72 73 const char * const if_event_names[] = { 74 "NOTHING", 75 "UP", 76 "WAITTIMER", 77 "BACKUPSEEN", 78 "NEIGHBORCHANGE", 79 "LOOP", 80 "UNLOOP", 81 "DOWN" 82 }; 83 84 const char * const if_action_names[] = { 85 "NOTHING", 86 "START", 87 "ELECT", 88 "RESET" 89 }; 90 91 int 92 if_fsm(struct iface *iface, enum iface_event event) 93 { 94 int old_state; 95 int new_state = 0; 96 int i, ret = 0; 97 98 old_state = iface->state; 99 100 for (i = 0; iface_fsm[i].state != -1; i++) 101 if ((iface_fsm[i].state & old_state) && 102 (iface_fsm[i].event == event)) { 103 new_state = iface_fsm[i].new_state; 104 break; 105 } 106 107 if (iface_fsm[i].state == -1) { 108 /* event outside of the defined fsm, ignore it. */ 109 log_debug("if_fsm: interface %s, " 110 "event %s not expected in state %s", iface->name, 111 if_event_names[event], if_state_name(old_state)); 112 return (0); 113 } 114 115 switch (iface_fsm[i].action) { 116 case IF_ACT_STRT: 117 ret = if_act_start(iface); 118 break; 119 case IF_ACT_ELECT: 120 ret = if_act_elect(iface); 121 break; 122 case IF_ACT_RST: 123 ret = if_act_reset(iface); 124 break; 125 case IF_ACT_NOTHING: 126 /* do nothing */ 127 break; 128 } 129 130 if (ret) { 131 log_debug("if_fsm: error changing state for interface %s, " 132 "event %s, state %s", iface->name, if_event_names[event], 133 if_state_name(old_state)); 134 return (-1); 135 } 136 137 if (new_state != 0) 138 iface->state = new_state; 139 140 if (iface->state != old_state) 141 orig_rtr_lsa(iface->area); 142 143 if (old_state & (IF_STA_MULTI | IF_STA_POINTTOPOINT) && 144 (iface->state & (IF_STA_MULTI | IF_STA_POINTTOPOINT)) == 0) 145 ospfe_demote_iface(iface, 0); 146 if ((old_state & (IF_STA_MULTI | IF_STA_POINTTOPOINT)) == 0 && 147 iface->state & (IF_STA_MULTI | IF_STA_POINTTOPOINT)) 148 ospfe_demote_iface(iface, 1); 149 150 log_debug("if_fsm: event %s resulted in action %s and changing " 151 "state for interface %s from %s to %s", 152 if_event_names[event], if_action_names[iface_fsm[i].action], 153 iface->name, if_state_name(old_state), if_state_name(iface->state)); 154 155 return (ret); 156 } 157 158 struct iface * 159 if_new(struct kif *kif, struct kif_addr *ka) 160 { 161 struct iface *iface; 162 163 if ((iface = calloc(1, sizeof(*iface))) == NULL) 164 err(1, "if_new: calloc"); 165 166 iface->state = IF_STA_DOWN; 167 168 LIST_INIT(&iface->nbr_list); 169 TAILQ_INIT(&iface->ls_ack_list); 170 171 if (kif == NULL) { 172 iface->type = IF_TYPE_VIRTUALLINK; 173 snprintf(iface->name, sizeof(iface->name), "vlink%d", 174 vlink_cnt++); 175 iface->flags |= IFF_UP; 176 iface->mtu = IP_MSS; 177 return (iface); 178 } 179 180 strlcpy(iface->name, kif->ifname, sizeof(iface->name)); 181 182 /* get type */ 183 if (kif->flags & IFF_POINTOPOINT) 184 iface->type = IF_TYPE_POINTOPOINT; 185 if (kif->flags & IFF_BROADCAST && 186 kif->flags & IFF_MULTICAST) 187 iface->type = IF_TYPE_BROADCAST; 188 if (kif->flags & IFF_LOOPBACK) { 189 iface->type = IF_TYPE_POINTOPOINT; 190 iface->state = IF_STA_LOOPBACK; 191 } 192 193 /* get mtu, index and flags */ 194 iface->mtu = kif->mtu; 195 iface->ifindex = kif->ifindex; 196 iface->flags = kif->flags; 197 iface->linkstate = kif->link_state; 198 iface->media_type = kif->media_type; 199 iface->baudrate = kif->baudrate; 200 201 /* set address, mask and p2p addr */ 202 iface->addr = ka->addr; 203 if (kif->flags & IFF_POINTOPOINT) { 204 iface->dst = ka->dstbrd; 205 } 206 207 return (iface); 208 } 209 210 void 211 if_del(struct iface *iface) 212 { 213 struct nbr *nbr = NULL; 214 215 log_debug("if_del: interface %s", iface->name); 216 217 /* revert the demotion when the interface is deleted */ 218 if ((iface->state & (IF_STA_MULTI | IF_STA_POINTTOPOINT)) == 0) 219 ospfe_demote_iface(iface, 1); 220 221 /* clear lists etc */ 222 while ((nbr = LIST_FIRST(&iface->nbr_list)) != NULL) 223 nbr_del(nbr); 224 225 if (evtimer_pending(&iface->hello_timer, NULL)) 226 evtimer_del(&iface->hello_timer); 227 if (evtimer_pending(&iface->wait_timer, NULL)) 228 evtimer_del(&iface->wait_timer); 229 if (evtimer_pending(&iface->lsack_tx_timer, NULL)) 230 evtimer_del(&iface->lsack_tx_timer); 231 232 ls_ack_list_clr(iface); 233 free(iface); 234 } 235 236 void 237 if_init(struct ospfd_conf *xconf, struct iface *iface) 238 { 239 /* init the dummy local neighbor */ 240 iface->self = nbr_new(ospfe_router_id(), iface, 1); 241 242 /* set event handlers for interface */ 243 evtimer_set(&iface->lsack_tx_timer, ls_ack_tx_timer, iface); 244 evtimer_set(&iface->hello_timer, if_hello_timer, iface); 245 evtimer_set(&iface->wait_timer, if_wait_timer, iface); 246 247 iface->fd = xconf->ospf_socket; 248 249 ospfe_demote_iface(iface, 0); 250 } 251 252 /* timers */ 253 /* ARGSUSED */ 254 void 255 if_hello_timer(int fd, short event, void *arg) 256 { 257 struct iface *iface = arg; 258 struct timeval tv; 259 260 send_hello(iface); 261 262 /* reschedule hello_timer */ 263 timerclear(&tv); 264 tv.tv_sec = iface->hello_interval; 265 if (evtimer_add(&iface->hello_timer, &tv) == -1) 266 fatal("if_hello_timer"); 267 } 268 269 void 270 if_start_hello_timer(struct iface *iface) 271 { 272 struct timeval tv; 273 274 timerclear(&tv); 275 if (evtimer_add(&iface->hello_timer, &tv) == -1) 276 fatal("if_start_hello_timer"); 277 } 278 279 void 280 if_stop_hello_timer(struct iface *iface) 281 { 282 if (evtimer_del(&iface->hello_timer) == -1) 283 fatal("if_stop_hello_timer"); 284 } 285 286 /* ARGSUSED */ 287 void 288 if_wait_timer(int fd, short event, void *arg) 289 { 290 struct iface *iface = arg; 291 292 if_fsm(iface, IF_EVT_WTIMER); 293 } 294 295 void 296 if_start_wait_timer(struct iface *iface) 297 { 298 struct timeval tv; 299 300 timerclear(&tv); 301 tv.tv_sec = iface->dead_interval; 302 if (evtimer_add(&iface->wait_timer, &tv) == -1) 303 fatal("if_start_wait_timer"); 304 } 305 306 void 307 if_stop_wait_timer(struct iface *iface) 308 { 309 if (evtimer_del(&iface->wait_timer) == -1) 310 fatal("if_stop_wait_timer"); 311 } 312 313 /* actions */ 314 int 315 if_act_start(struct iface *iface) 316 { 317 struct in6_addr addr; 318 struct timeval now; 319 320 if (!((iface->flags & IFF_UP) && 321 (LINK_STATE_IS_UP(iface->linkstate) || 322 (iface->linkstate == LINK_STATE_UNKNOWN && 323 iface->media_type != IFT_CARP)))) { 324 log_debug("if_act_start: interface %s link down", 325 iface->name); 326 return (0); 327 } 328 329 if (iface->media_type == IFT_CARP && iface->passive == 0) { 330 /* force passive mode on carp interfaces */ 331 log_warnx("if_act_start: forcing interface %s to passive", 332 iface->name); 333 iface->passive = 1; 334 } 335 336 if (iface->passive) { 337 /* for an update of stub network entries */ 338 orig_rtr_lsa(iface->area); 339 return (0); 340 } 341 342 gettimeofday(&now, NULL); 343 iface->uptime = now.tv_sec; 344 345 switch (iface->type) { 346 case IF_TYPE_POINTOPOINT: 347 inet_pton(AF_INET6, AllSPFRouters, &addr); 348 349 if (if_join_group(iface, &addr)) 350 return (-1); 351 iface->state = IF_STA_POINTTOPOINT; 352 break; 353 case IF_TYPE_VIRTUALLINK: 354 iface->state = IF_STA_POINTTOPOINT; 355 break; 356 case IF_TYPE_POINTOMULTIPOINT: 357 case IF_TYPE_NBMA: 358 log_debug("if_act_start: type %s not supported, interface %s", 359 if_type_name(iface->type), iface->name); 360 return (-1); 361 case IF_TYPE_BROADCAST: 362 inet_pton(AF_INET6, AllSPFRouters, &addr); 363 364 if (if_join_group(iface, &addr)) 365 return (-1); 366 if (iface->priority == 0) { 367 iface->state = IF_STA_DROTHER; 368 } else { 369 iface->state = IF_STA_WAITING; 370 if_start_wait_timer(iface); 371 } 372 break; 373 default: 374 fatalx("if_act_start: unknown interface type"); 375 } 376 377 /* hello timer needs to be started in any case */ 378 if_start_hello_timer(iface); 379 return (0); 380 } 381 382 struct nbr * 383 if_elect(struct nbr *a, struct nbr *b) 384 { 385 if (a->priority > b->priority) 386 return (a); 387 if (a->priority < b->priority) 388 return (b); 389 if (ntohl(a->id.s_addr) > ntohl(b->id.s_addr)) 390 return (a); 391 return (b); 392 } 393 394 int 395 if_act_elect(struct iface *iface) 396 { 397 struct in6_addr addr; 398 struct nbr *nbr, *bdr = NULL, *dr = NULL; 399 int round = 0; 400 int changed = 0; 401 int old_state; 402 char b1[16], b2[16], b3[16], b4[16]; 403 404 start: 405 /* elect backup designated router */ 406 LIST_FOREACH(nbr, &iface->nbr_list, entry) { 407 if (nbr->priority == 0 || nbr == dr || /* not electable */ 408 nbr->state & NBR_STA_PRELIM || /* not available */ 409 nbr->dr.s_addr == nbr->id.s_addr) /* don't elect DR */ 410 continue; 411 if (bdr != NULL) { 412 /* 413 * routers announcing themselves as BDR have higher 414 * precedence over those routers announcing a 415 * different BDR. 416 */ 417 if (nbr->bdr.s_addr == nbr->id.s_addr) { 418 if (bdr->bdr.s_addr == bdr->id.s_addr) 419 bdr = if_elect(bdr, nbr); 420 else 421 bdr = nbr; 422 } else if (bdr->bdr.s_addr != bdr->id.s_addr) 423 bdr = if_elect(bdr, nbr); 424 } else 425 bdr = nbr; 426 } 427 428 /* elect designated router */ 429 LIST_FOREACH(nbr, &iface->nbr_list, entry) { 430 if (nbr->priority == 0 || nbr->state & NBR_STA_PRELIM || 431 (nbr != dr && nbr->dr.s_addr != nbr->id.s_addr)) 432 /* only DR may be elected check priority too */ 433 continue; 434 if (dr == NULL) 435 dr = nbr; 436 else 437 dr = if_elect(dr, nbr); 438 } 439 440 if (dr == NULL) { 441 /* no designate router found use backup DR */ 442 dr = bdr; 443 bdr = NULL; 444 } 445 446 /* 447 * if we are involved in the election (e.g. new DR or no 448 * longer BDR) redo the election 449 */ 450 if (round == 0 && 451 ((iface->self == dr && iface->self != iface->dr) || 452 (iface->self != dr && iface->self == iface->dr) || 453 (iface->self == bdr && iface->self != iface->bdr) || 454 (iface->self != bdr && iface->self == iface->bdr))) { 455 /* 456 * Reset announced DR/BDR to calculated one, so 457 * that we may get elected in the second round. 458 * This is needed to drop from a DR to a BDR. 459 */ 460 iface->self->dr.s_addr = dr->id.s_addr; 461 if (bdr) 462 iface->self->bdr.s_addr = bdr->id.s_addr; 463 round = 1; 464 goto start; 465 } 466 467 log_debug("if_act_elect: interface %s old dr %s new dr %s, " 468 "old bdr %s new bdr %s", iface->name, 469 iface->dr ? inet_ntop(AF_INET, &iface->dr->id, b1, sizeof(b1)) : 470 "none", dr ? inet_ntop(AF_INET, &dr->id, b2, sizeof(b2)) : "none", 471 iface->bdr ? inet_ntop(AF_INET, &iface->bdr->id, b3, sizeof(b3)) : 472 "none", bdr ? inet_ntop(AF_INET, &bdr->id, b4, sizeof(b4)) : 473 "none"); 474 475 /* 476 * After the second round still DR or BDR change state to DR or BDR, 477 * etc. 478 */ 479 old_state = iface->state; 480 if (dr == iface->self) 481 iface->state = IF_STA_DR; 482 else if (bdr == iface->self) 483 iface->state = IF_STA_BACKUP; 484 else 485 iface->state = IF_STA_DROTHER; 486 487 /* TODO if iface is NBMA send all non eligible neighbors event Start */ 488 489 /* 490 * if DR or BDR changed issue a AdjOK? event for all neighbors > 2-Way 491 */ 492 if (iface->dr != dr || iface->bdr != bdr) 493 changed = 1; 494 495 iface->dr = dr; 496 iface->bdr = bdr; 497 498 if (changed) { 499 inet_pton(AF_INET6, AllDRouters, &addr); 500 if (old_state & IF_STA_DRORBDR && 501 (iface->state & IF_STA_DRORBDR) == 0) { 502 if (if_leave_group(iface, &addr)) 503 return (-1); 504 } else if ((old_state & IF_STA_DRORBDR) == 0 && 505 iface->state & IF_STA_DRORBDR) { 506 if (if_join_group(iface, &addr)) 507 return (-1); 508 } 509 510 LIST_FOREACH(nbr, &iface->nbr_list, entry) { 511 if (nbr->state & NBR_STA_BIDIR) 512 nbr_fsm(nbr, NBR_EVT_ADJ_OK); 513 } 514 515 orig_rtr_lsa(iface->area); 516 if (iface->state & IF_STA_DR || old_state & IF_STA_DR) 517 orig_net_lsa(iface); 518 } 519 520 if_start_hello_timer(iface); 521 return (0); 522 } 523 524 int 525 if_act_reset(struct iface *iface) 526 { 527 struct nbr *nbr = NULL; 528 struct in6_addr addr; 529 530 if (iface->passive) { 531 /* for an update of stub network entries */ 532 orig_rtr_lsa(iface->area); 533 return (0); 534 } 535 536 switch (iface->type) { 537 case IF_TYPE_POINTOPOINT: 538 case IF_TYPE_BROADCAST: 539 inet_pton(AF_INET6, AllSPFRouters, &addr); 540 if (if_leave_group(iface, &addr)) { 541 log_warnx("if_act_reset: error leaving group %s, " 542 "interface %s", log_in6addr(&addr), iface->name); 543 } 544 if (iface->state & IF_STA_DRORBDR) { 545 inet_pton(AF_INET6, AllDRouters, &addr); 546 if (if_leave_group(iface, &addr)) { 547 log_warnx("if_act_reset: " 548 "error leaving group %s, interface %s", 549 log_in6addr(&addr), iface->name); 550 } 551 } 552 break; 553 case IF_TYPE_VIRTUALLINK: 554 /* nothing */ 555 break; 556 case IF_TYPE_NBMA: 557 case IF_TYPE_POINTOMULTIPOINT: 558 log_debug("if_act_reset: type %s not supported, interface %s", 559 if_type_name(iface->type), iface->name); 560 return (-1); 561 default: 562 fatalx("if_act_reset: unknown interface type"); 563 } 564 565 LIST_FOREACH(nbr, &iface->nbr_list, entry) { 566 if (nbr_fsm(nbr, NBR_EVT_KILL_NBR)) { 567 log_debug("if_act_reset: error killing neighbor %s", 568 inet_ntoa(nbr->id)); 569 } 570 } 571 572 iface->dr = NULL; 573 iface->bdr = NULL; 574 575 ls_ack_list_clr(iface); 576 stop_ls_ack_tx_timer(iface); 577 if_stop_hello_timer(iface); 578 if_stop_wait_timer(iface); 579 580 /* send empty hello to tell everybody that we are going down */ 581 send_hello(iface); 582 583 return (0); 584 } 585 586 struct ctl_iface * 587 if_to_ctl(struct iface *iface) 588 { 589 static struct ctl_iface ictl; 590 struct timeval tv, now, res; 591 struct nbr *nbr; 592 593 memcpy(ictl.name, iface->name, sizeof(ictl.name)); 594 memcpy(&ictl.addr, &iface->addr, sizeof(ictl.addr)); 595 ictl.rtr_id.s_addr = ospfe_router_id(); 596 memcpy(&ictl.area, &iface->area->id, sizeof(ictl.area)); 597 if (iface->dr) { 598 memcpy(&ictl.dr_id, &iface->dr->id, sizeof(ictl.dr_id)); 599 memcpy(&ictl.dr_addr, &iface->dr->addr, sizeof(ictl.dr_addr)); 600 } else { 601 bzero(&ictl.dr_id, sizeof(ictl.dr_id)); 602 bzero(&ictl.dr_addr, sizeof(ictl.dr_addr)); 603 } 604 if (iface->bdr) { 605 memcpy(&ictl.bdr_id, &iface->bdr->id, sizeof(ictl.bdr_id)); 606 memcpy(&ictl.bdr_addr, &iface->bdr->addr, 607 sizeof(ictl.bdr_addr)); 608 } else { 609 bzero(&ictl.bdr_id, sizeof(ictl.bdr_id)); 610 bzero(&ictl.bdr_addr, sizeof(ictl.bdr_addr)); 611 } 612 ictl.ifindex = iface->ifindex; 613 ictl.state = iface->state; 614 ictl.mtu = iface->mtu; 615 ictl.nbr_cnt = 0; 616 ictl.adj_cnt = 0; 617 ictl.baudrate = iface->baudrate; 618 ictl.dead_interval = iface->dead_interval; 619 ictl.transmit_delay = iface->transmit_delay; 620 ictl.hello_interval = iface->hello_interval; 621 ictl.flags = iface->flags; 622 ictl.metric = iface->metric; 623 ictl.rxmt_interval = iface->rxmt_interval; 624 ictl.type = iface->type; 625 ictl.linkstate = iface->linkstate; 626 ictl.mediatype = iface->media_type; 627 ictl.priority = iface->priority; 628 ictl.passive = iface->passive; 629 630 gettimeofday(&now, NULL); 631 if (evtimer_pending(&iface->hello_timer, &tv)) { 632 timersub(&tv, &now, &res); 633 ictl.hello_timer = res.tv_sec; 634 } else 635 ictl.hello_timer = -1; 636 637 if (iface->state != IF_STA_DOWN) { 638 ictl.uptime = now.tv_sec - iface->uptime; 639 } else 640 ictl.uptime = 0; 641 642 LIST_FOREACH(nbr, &iface->nbr_list, entry) { 643 if (nbr == iface->self) 644 continue; 645 ictl.nbr_cnt++; 646 if (nbr->state & NBR_STA_ADJFORM) 647 ictl.adj_cnt++; 648 } 649 650 return (&ictl); 651 } 652 653 /* misc */ 654 void 655 if_set_recvbuf(int fd) 656 { 657 int bsize; 658 659 bsize = 65535; 660 while (setsockopt(fd, SOL_SOCKET, SO_RCVBUF, &bsize, 661 sizeof(bsize)) == -1) 662 bsize /= 2; 663 } 664 665 int 666 if_join_group(struct iface *iface, struct in6_addr *addr) 667 { 668 struct ipv6_mreq mreq; 669 670 switch (iface->type) { 671 case IF_TYPE_POINTOPOINT: 672 case IF_TYPE_BROADCAST: 673 log_debug("if_join_group: interface %s addr %s", 674 iface->name, log_in6addr(addr)); 675 mreq.ipv6mr_multiaddr = *addr; 676 mreq.ipv6mr_interface = iface->ifindex; 677 678 if (setsockopt(iface->fd, IPPROTO_IPV6, IPV6_JOIN_GROUP, 679 &mreq, sizeof(mreq)) < 0) { 680 log_warn("if_join_group: error IPV6_JOIN_GROUP, " 681 "interface %s address %s", iface->name, 682 log_in6addr(addr)); 683 return (-1); 684 } 685 break; 686 case IF_TYPE_POINTOMULTIPOINT: 687 case IF_TYPE_VIRTUALLINK: 688 case IF_TYPE_NBMA: 689 log_debug("if_join_group: type %s not supported, interface %s", 690 if_type_name(iface->type), iface->name); 691 return (-1); 692 default: 693 fatalx("if_join_group: unknown interface type"); 694 } 695 696 return (0); 697 } 698 699 int 700 if_leave_group(struct iface *iface, struct in6_addr *addr) 701 { 702 struct ipv6_mreq mreq; 703 704 switch (iface->type) { 705 case IF_TYPE_POINTOPOINT: 706 case IF_TYPE_BROADCAST: 707 log_debug("if_leave_group: interface %s addr %s", 708 iface->name, log_in6addr(addr)); 709 mreq.ipv6mr_multiaddr = *addr; 710 mreq.ipv6mr_interface = iface->ifindex; 711 712 if (setsockopt(iface->fd, IPPROTO_IPV6, IPV6_LEAVE_GROUP, 713 (void *)&mreq, sizeof(mreq)) < 0) { 714 log_warn("if_leave_group: error IPV6_LEAVE_GROUP, " 715 "interface %s address %s", iface->name, 716 log_in6addr(addr)); 717 return (-1); 718 } 719 break; 720 case IF_TYPE_POINTOMULTIPOINT: 721 case IF_TYPE_VIRTUALLINK: 722 case IF_TYPE_NBMA: 723 log_debug("if_leave_group: type %s not supported, interface %s", 724 if_type_name(iface->type), iface->name); 725 return (-1); 726 default: 727 fatalx("if_leave_group: unknown interface type"); 728 } 729 return (0); 730 } 731 732 int 733 if_set_mcast(struct iface *iface) 734 { 735 switch (iface->type) { 736 case IF_TYPE_POINTOPOINT: 737 case IF_TYPE_BROADCAST: 738 if (setsockopt(iface->fd, IPPROTO_IPV6, IPV6_MULTICAST_IF, 739 &iface->ifindex, sizeof(iface->ifindex)) < 0) { 740 log_debug("if_set_mcast: error setting " 741 "IP_MULTICAST_IF, interface %s", iface->name); 742 return (-1); 743 } 744 break; 745 case IF_TYPE_POINTOMULTIPOINT: 746 case IF_TYPE_VIRTUALLINK: 747 case IF_TYPE_NBMA: 748 log_debug("if_set_mcast: type %s not supported, interface %s", 749 if_type_name(iface->type), iface->name); 750 return (-1); 751 default: 752 fatalx("if_set_mcast: unknown interface type"); 753 } 754 755 return (0); 756 } 757 758 int 759 if_set_mcast_loop(int fd) 760 { 761 u_int loop = 0; 762 763 if (setsockopt(fd, IPPROTO_IPV6, IPV6_MULTICAST_LOOP, 764 (u_int *)&loop, sizeof(loop)) < 0) { 765 log_warn("if_set_mcast_loop: error setting " 766 "IPV6_MULTICAST_LOOP"); 767 return (-1); 768 } 769 770 return (0); 771 } 772 773 int 774 if_set_ipv6_pktinfo(int fd, int enable) 775 { 776 if (setsockopt(fd, IPPROTO_IPV6, IPV6_RECVPKTINFO, &enable, 777 sizeof(enable)) < 0) { 778 log_warn("if_set_ipv6_pktinfo: error setting IPV6_PKTINFO"); 779 return (-1); 780 } 781 782 return (0); 783 } 784 785 int 786 if_set_ipv6_checksum(int fd) 787 { 788 int offset = offsetof(struct ospf_hdr, chksum); 789 790 log_debug("if_set_ipv6_checksum setting cksum offset to %i", offset); 791 if (setsockopt(fd, IPPROTO_IPV6, IPV6_CHECKSUM, &offset, 792 sizeof(offset)) < 0) { 793 log_warn("if_set_ipv6_checksum: error setting IPV6_CHECKSUM"); 794 return (-1); 795 } 796 return (0); 797 } 798