1 /* $OpenBSD: interface.c,v 1.30 2023/03/08 04:43:14 guenther 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 <stdio.h> 31 #include <stdlib.h> 32 #include <unistd.h> 33 #include <string.h> 34 #include <event.h> 35 36 #include "ospf6d.h" 37 #include "ospf6.h" 38 #include "log.h" 39 #include "ospfe.h" 40 41 void if_hello_timer(int, short, void *); 42 void if_start_hello_timer(struct iface *); 43 void if_stop_hello_timer(struct iface *); 44 void if_stop_wait_timer(struct iface *); 45 void if_wait_timer(int, short, void *); 46 void if_start_wait_timer(struct iface *); 47 void if_stop_wait_timer(struct iface *); 48 struct nbr *if_elect(struct nbr *, struct nbr *); 49 50 struct { 51 int state; 52 enum iface_event event; 53 enum iface_action action; 54 int new_state; 55 } iface_fsm[] = { 56 /* current state event that happened action to take resulting state */ 57 {IF_STA_DOWN, IF_EVT_UP, IF_ACT_STRT, 0}, 58 {IF_STA_WAITING, IF_EVT_BACKUP_SEEN, IF_ACT_ELECT, 0}, 59 {IF_STA_WAITING, IF_EVT_WTIMER, IF_ACT_ELECT, 0}, 60 {IF_STA_ANY, IF_EVT_WTIMER, IF_ACT_NOTHING, 0}, 61 {IF_STA_WAITING, IF_EVT_NBR_CHNG, IF_ACT_NOTHING, 0}, 62 {IF_STA_MULTI, IF_EVT_NBR_CHNG, IF_ACT_ELECT, 0}, 63 {IF_STA_ANY, IF_EVT_NBR_CHNG, IF_ACT_NOTHING, 0}, 64 {IF_STA_ANY, IF_EVT_DOWN, IF_ACT_RST, IF_STA_DOWN}, 65 {IF_STA_ANY, IF_EVT_LOOP, IF_ACT_RST, IF_STA_LOOPBACK}, 66 {IF_STA_LOOPBACK, IF_EVT_UNLOOP, IF_ACT_NOTHING, IF_STA_DOWN}, 67 {-1, IF_EVT_NOTHING, IF_ACT_NOTHING, 0}, 68 }; 69 70 #if 0 71 /* TODO virtual links */ 72 static int vlink_cnt = 0; 73 #endif 74 75 TAILQ_HEAD(, iface) iflist; 76 77 const char * const if_event_names[] = { 78 "NOTHING", 79 "UP", 80 "WAITTIMER", 81 "BACKUPSEEN", 82 "NEIGHBORCHANGE", 83 "LOOP", 84 "UNLOOP", 85 "DOWN" 86 }; 87 88 const char * const if_action_names[] = { 89 "NOTHING", 90 "START", 91 "ELECT", 92 "RESET" 93 }; 94 95 int 96 if_fsm(struct iface *iface, enum iface_event event) 97 { 98 int old_state; 99 int new_state = 0; 100 int i, ret = 0; 101 102 old_state = iface->state; 103 104 for (i = 0; iface_fsm[i].state != -1; i++) 105 if ((iface_fsm[i].state & old_state) && 106 (iface_fsm[i].event == event)) { 107 new_state = iface_fsm[i].new_state; 108 break; 109 } 110 111 if (iface_fsm[i].state == -1) { 112 /* event outside of the defined fsm, ignore it. */ 113 log_debug("if_fsm: interface %s, " 114 "event %s not expected in state %s", iface->name, 115 if_event_names[event], if_state_name(old_state)); 116 return (0); 117 } 118 119 switch (iface_fsm[i].action) { 120 case IF_ACT_STRT: 121 ret = if_act_start(iface); 122 break; 123 case IF_ACT_ELECT: 124 ret = if_act_elect(iface); 125 break; 126 case IF_ACT_RST: 127 ret = if_act_reset(iface); 128 break; 129 case IF_ACT_NOTHING: 130 /* do nothing */ 131 break; 132 } 133 134 if (ret) { 135 log_debug("if_fsm: error changing state for interface %s, " 136 "event %s, state %s", iface->name, if_event_names[event], 137 if_state_name(old_state)); 138 return (-1); 139 } 140 141 if (new_state != 0) 142 iface->state = new_state; 143 144 if (iface->state != old_state) { 145 area_track(iface->area); 146 orig_rtr_lsa(iface->area); 147 orig_link_lsa(iface); 148 149 /* state change inform RDE */ 150 ospfe_imsg_compose_rde(IMSG_IFINFO, iface->self->peerid, 0, 151 &iface->state, sizeof(iface->state)); 152 } 153 154 if (old_state & (IF_STA_MULTI | IF_STA_POINTTOPOINT) && 155 (iface->state & (IF_STA_MULTI | IF_STA_POINTTOPOINT)) == 0) 156 ospfe_demote_iface(iface, 0); 157 if ((old_state & (IF_STA_MULTI | IF_STA_POINTTOPOINT)) == 0 && 158 iface->state & (IF_STA_MULTI | IF_STA_POINTTOPOINT)) 159 ospfe_demote_iface(iface, 1); 160 161 log_debug("if_fsm: event %s resulted in action %s and changing " 162 "state for interface %s from %s to %s", 163 if_event_names[event], if_action_names[iface_fsm[i].action], 164 iface->name, if_state_name(old_state), if_state_name(iface->state)); 165 166 return (ret); 167 } 168 169 int 170 if_init(void) 171 { 172 TAILQ_INIT(&iflist); 173 174 return (fetchifs(0)); 175 } 176 177 /* XXX using a linked list should be OK for now */ 178 struct iface * 179 if_find(unsigned int ifindex) 180 { 181 struct iface *iface; 182 183 TAILQ_FOREACH(iface, &iflist, list) { 184 if (ifindex == iface->ifindex) 185 return (iface); 186 } 187 return (NULL); 188 } 189 190 struct iface * 191 if_findname(char *name) 192 { 193 struct iface *iface; 194 195 TAILQ_FOREACH(iface, &iflist, list) { 196 if (!strcmp(name, iface->name)) 197 return (iface); 198 } 199 return (NULL); 200 } 201 202 struct iface * 203 if_new(u_short ifindex, char *ifname) 204 { 205 struct iface *iface; 206 207 if ((iface = calloc(1, sizeof(*iface))) == NULL) 208 err(1, "if_new: calloc"); 209 210 iface->state = IF_STA_DOWN; 211 212 LIST_INIT(&iface->nbr_list); 213 TAILQ_INIT(&iface->ifa_list); 214 TAILQ_INIT(&iface->ls_ack_list); 215 RB_INIT(&iface->lsa_tree); 216 217 #if 0 218 /* TODO */ 219 if (virtual) { 220 iface->type = IF_TYPE_VIRTUALLINK; 221 snprintf(iface->name, sizeof(iface->name), "vlink%d", 222 vlink_cnt++); 223 iface->flags |= IFF_UP; 224 iface->mtu = IP_MSS; 225 return (iface); 226 } 227 #endif 228 strlcpy(iface->name, ifname, sizeof(iface->name)); 229 iface->ifindex = ifindex; 230 231 TAILQ_INSERT_TAIL(&iflist, iface, list); 232 233 return (iface); 234 } 235 236 void 237 if_update(struct iface *iface, int mtu, int flags, u_int8_t type, 238 u_int8_t state, u_int64_t rate, u_int32_t rdomain) 239 { 240 iface->mtu = mtu; 241 iface->flags = flags; 242 iface->if_type = type; 243 iface->linkstate = state; 244 iface->baudrate = rate; 245 iface->rdomain = rdomain; 246 247 /* set type */ 248 if (flags & IFF_POINTOPOINT) 249 iface->type = IF_TYPE_POINTOPOINT; 250 if (flags & IFF_BROADCAST && flags & IFF_MULTICAST) 251 iface->type = IF_TYPE_BROADCAST; 252 if (flags & IFF_LOOPBACK) { 253 iface->type = IF_TYPE_POINTOPOINT; 254 iface->cflags |= F_IFACE_PASSIVE; 255 } 256 } 257 258 void 259 if_del(struct iface *iface) 260 { 261 struct nbr *nbr = NULL; 262 263 log_debug("if_del: interface %s", iface->name); 264 265 /* revert the demotion when the interface is deleted */ 266 if ((iface->state & (IF_STA_MULTI | IF_STA_POINTTOPOINT)) == 0) 267 ospfe_demote_iface(iface, 1); 268 269 /* clear lists etc */ 270 while ((nbr = LIST_FIRST(&iface->nbr_list)) != NULL) 271 nbr_del(nbr); 272 273 if (evtimer_pending(&iface->hello_timer, NULL)) 274 evtimer_del(&iface->hello_timer); 275 if (evtimer_pending(&iface->wait_timer, NULL)) 276 evtimer_del(&iface->wait_timer); 277 if (evtimer_pending(&iface->lsack_tx_timer, NULL)) 278 evtimer_del(&iface->lsack_tx_timer); 279 280 ls_ack_list_clr(iface); 281 TAILQ_REMOVE(&iflist, iface, list); 282 free(iface); 283 } 284 285 void 286 if_start(struct ospfd_conf *xconf, struct iface *iface) 287 { 288 /* init the dummy local neighbor */ 289 iface->self = nbr_new(ospfe_router_id(), iface, iface->ifindex, 1, 290 NULL); 291 292 /* set event handlers for interface */ 293 evtimer_set(&iface->lsack_tx_timer, ls_ack_tx_timer, iface); 294 evtimer_set(&iface->hello_timer, if_hello_timer, iface); 295 evtimer_set(&iface->wait_timer, if_wait_timer, iface); 296 297 iface->fd = xconf->ospf_socket; 298 299 ospfe_demote_iface(iface, 0); 300 301 if (if_fsm(iface, IF_EVT_UP)) 302 log_debug("error starting interface %s", iface->name); 303 } 304 305 /* timers */ 306 void 307 if_hello_timer(int fd, short event, void *arg) 308 { 309 struct iface *iface = arg; 310 struct timeval tv; 311 312 send_hello(iface); 313 314 /* reschedule hello_timer */ 315 timerclear(&tv); 316 tv.tv_sec = iface->hello_interval; 317 if (evtimer_add(&iface->hello_timer, &tv) == -1) 318 fatal("if_hello_timer"); 319 } 320 321 void 322 if_start_hello_timer(struct iface *iface) 323 { 324 struct timeval tv; 325 326 timerclear(&tv); 327 if (evtimer_add(&iface->hello_timer, &tv) == -1) 328 fatal("if_start_hello_timer"); 329 } 330 331 void 332 if_stop_hello_timer(struct iface *iface) 333 { 334 if (evtimer_del(&iface->hello_timer) == -1) 335 fatal("if_stop_hello_timer"); 336 } 337 338 void 339 if_wait_timer(int fd, short event, void *arg) 340 { 341 struct iface *iface = arg; 342 343 if_fsm(iface, IF_EVT_WTIMER); 344 } 345 346 void 347 if_start_wait_timer(struct iface *iface) 348 { 349 struct timeval tv; 350 351 timerclear(&tv); 352 tv.tv_sec = iface->dead_interval; 353 if (evtimer_add(&iface->wait_timer, &tv) == -1) 354 fatal("if_start_wait_timer"); 355 } 356 357 void 358 if_stop_wait_timer(struct iface *iface) 359 { 360 if (evtimer_del(&iface->wait_timer) == -1) 361 fatal("if_stop_wait_timer"); 362 } 363 364 /* actions */ 365 int 366 if_act_start(struct iface *iface) 367 { 368 struct in6_addr addr; 369 struct timeval now; 370 371 if (!((iface->flags & IFF_UP) && 372 LINK_STATE_IS_UP(iface->linkstate))) { 373 log_debug("if_act_start: interface %s link down", 374 iface->name); 375 return (0); 376 } 377 378 if (iface->if_type == IFT_CARP && 379 !(iface->cflags & F_IFACE_PASSIVE)) { 380 /* force passive mode on carp interfaces */ 381 log_warnx("if_act_start: forcing interface %s to passive", 382 iface->name); 383 iface->cflags |= F_IFACE_PASSIVE; 384 } 385 386 gettimeofday(&now, NULL); 387 iface->uptime = now.tv_sec; 388 389 /* loopback interfaces have a special state */ 390 if (iface->flags & IFF_LOOPBACK) 391 iface->state = IF_STA_LOOPBACK; 392 393 if (iface->cflags & F_IFACE_PASSIVE) { 394 /* for an update of stub network entries */ 395 orig_rtr_lsa(iface->area); 396 return (0); 397 } 398 399 switch (iface->type) { 400 case IF_TYPE_POINTOPOINT: 401 inet_pton(AF_INET6, AllSPFRouters, &addr); 402 403 if (if_join_group(iface, &addr)) 404 return (-1); 405 iface->state = IF_STA_POINTTOPOINT; 406 break; 407 case IF_TYPE_VIRTUALLINK: 408 iface->state = IF_STA_POINTTOPOINT; 409 break; 410 case IF_TYPE_POINTOMULTIPOINT: 411 case IF_TYPE_NBMA: 412 log_debug("if_act_start: type %s not supported, interface %s", 413 if_type_name(iface->type), iface->name); 414 return (-1); 415 case IF_TYPE_BROADCAST: 416 inet_pton(AF_INET6, AllSPFRouters, &addr); 417 418 if (if_join_group(iface, &addr)) 419 return (-1); 420 if (iface->priority == 0) { 421 iface->state = IF_STA_DROTHER; 422 } else { 423 iface->state = IF_STA_WAITING; 424 if_start_wait_timer(iface); 425 } 426 break; 427 default: 428 fatalx("if_act_start: unknown interface type"); 429 } 430 431 /* hello timer needs to be started in any case */ 432 if_start_hello_timer(iface); 433 return (0); 434 } 435 436 struct nbr * 437 if_elect(struct nbr *a, struct nbr *b) 438 { 439 if (a->priority > b->priority) 440 return (a); 441 if (a->priority < b->priority) 442 return (b); 443 if (ntohl(a->id.s_addr) > ntohl(b->id.s_addr)) 444 return (a); 445 return (b); 446 } 447 448 int 449 if_act_elect(struct iface *iface) 450 { 451 struct in6_addr addr; 452 struct nbr *nbr, *bdr = NULL, *dr = NULL; 453 int round = 0; 454 int changed = 0; 455 int old_state; 456 char b1[16], b2[16], b3[16], b4[16]; 457 458 start: 459 /* elect backup designated router */ 460 LIST_FOREACH(nbr, &iface->nbr_list, entry) { 461 if (nbr->priority == 0 || nbr == dr || /* not electable */ 462 nbr->state & NBR_STA_PRELIM || /* not available */ 463 nbr->dr.s_addr == nbr->id.s_addr) /* don't elect DR */ 464 continue; 465 if (bdr != NULL) { 466 /* 467 * routers announcing themselves as BDR have higher 468 * precedence over those routers announcing a 469 * different BDR. 470 */ 471 if (nbr->bdr.s_addr == nbr->id.s_addr) { 472 if (bdr->bdr.s_addr == bdr->id.s_addr) 473 bdr = if_elect(bdr, nbr); 474 else 475 bdr = nbr; 476 } else if (bdr->bdr.s_addr != bdr->id.s_addr) 477 bdr = if_elect(bdr, nbr); 478 } else 479 bdr = nbr; 480 } 481 482 /* elect designated router */ 483 LIST_FOREACH(nbr, &iface->nbr_list, entry) { 484 if (nbr->priority == 0 || nbr->state & NBR_STA_PRELIM || 485 (nbr != dr && nbr->dr.s_addr != nbr->id.s_addr)) 486 /* only DR may be elected check priority too */ 487 continue; 488 if (dr == NULL) 489 dr = nbr; 490 else 491 dr = if_elect(dr, nbr); 492 } 493 494 if (dr == NULL) { 495 /* no designate router found use backup DR */ 496 dr = bdr; 497 bdr = NULL; 498 } 499 500 /* 501 * if we are involved in the election (e.g. new DR or no 502 * longer BDR) redo the election 503 */ 504 if (round == 0 && 505 ((iface->self == dr && iface->self != iface->dr) || 506 (iface->self != dr && iface->self == iface->dr) || 507 (iface->self == bdr && iface->self != iface->bdr) || 508 (iface->self != bdr && iface->self == iface->bdr))) { 509 /* 510 * Reset announced DR/BDR to calculated one, so 511 * that we may get elected in the second round. 512 * This is needed to drop from a DR to a BDR. 513 */ 514 iface->self->dr.s_addr = dr->id.s_addr; 515 if (bdr) 516 iface->self->bdr.s_addr = bdr->id.s_addr; 517 round = 1; 518 goto start; 519 } 520 521 log_debug("if_act_elect: interface %s old dr %s new dr %s, " 522 "old bdr %s new bdr %s", iface->name, 523 iface->dr ? inet_ntop(AF_INET, &iface->dr->id, b1, sizeof(b1)) : 524 "none", dr ? inet_ntop(AF_INET, &dr->id, b2, sizeof(b2)) : "none", 525 iface->bdr ? inet_ntop(AF_INET, &iface->bdr->id, b3, sizeof(b3)) : 526 "none", bdr ? inet_ntop(AF_INET, &bdr->id, b4, sizeof(b4)) : 527 "none"); 528 529 /* 530 * After the second round still DR or BDR change state to DR or BDR, 531 * etc. 532 */ 533 old_state = iface->state; 534 if (dr == iface->self) 535 iface->state = IF_STA_DR; 536 else if (bdr == iface->self) 537 iface->state = IF_STA_BACKUP; 538 else 539 iface->state = IF_STA_DROTHER; 540 541 /* TODO if iface is NBMA send all non eligible neighbors event Start */ 542 543 /* 544 * if DR or BDR changed issue a AdjOK? event for all neighbors > 2-Way 545 */ 546 if (iface->dr != dr || iface->bdr != bdr) 547 changed = 1; 548 549 iface->dr = dr; 550 iface->bdr = bdr; 551 552 if (changed) { 553 inet_pton(AF_INET6, AllDRouters, &addr); 554 if (old_state & IF_STA_DRORBDR && 555 (iface->state & IF_STA_DRORBDR) == 0) { 556 if (if_leave_group(iface, &addr)) 557 return (-1); 558 } else if ((old_state & IF_STA_DRORBDR) == 0 && 559 iface->state & IF_STA_DRORBDR) { 560 if (if_join_group(iface, &addr)) 561 return (-1); 562 } 563 564 LIST_FOREACH(nbr, &iface->nbr_list, entry) { 565 if (nbr->state & NBR_STA_BIDIR) 566 nbr_fsm(nbr, NBR_EVT_ADJ_OK); 567 } 568 569 orig_rtr_lsa(iface->area); 570 if (iface->state & IF_STA_DR || old_state & IF_STA_DR) 571 orig_net_lsa(iface); 572 } 573 574 if_start_hello_timer(iface); 575 return (0); 576 } 577 578 int 579 if_act_reset(struct iface *iface) 580 { 581 struct nbr *nbr = NULL; 582 struct in6_addr addr; 583 584 if (iface->cflags & F_IFACE_PASSIVE) { 585 /* for an update of stub network entries */ 586 orig_rtr_lsa(iface->area); 587 return (0); 588 } 589 590 switch (iface->type) { 591 case IF_TYPE_POINTOPOINT: 592 case IF_TYPE_BROADCAST: 593 inet_pton(AF_INET6, AllSPFRouters, &addr); 594 if (if_leave_group(iface, &addr)) { 595 log_warnx("if_act_reset: error leaving group %s, " 596 "interface %s", log_in6addr(&addr), iface->name); 597 } 598 if (iface->state & IF_STA_DRORBDR) { 599 inet_pton(AF_INET6, AllDRouters, &addr); 600 if (if_leave_group(iface, &addr)) { 601 log_warnx("if_act_reset: " 602 "error leaving group %s, interface %s", 603 log_in6addr(&addr), iface->name); 604 } 605 } 606 break; 607 case IF_TYPE_VIRTUALLINK: 608 /* nothing */ 609 break; 610 case IF_TYPE_NBMA: 611 case IF_TYPE_POINTOMULTIPOINT: 612 log_debug("if_act_reset: type %s not supported, interface %s", 613 if_type_name(iface->type), iface->name); 614 return (-1); 615 default: 616 fatalx("if_act_reset: unknown interface type"); 617 } 618 619 LIST_FOREACH(nbr, &iface->nbr_list, entry) { 620 if (nbr_fsm(nbr, NBR_EVT_KILL_NBR)) { 621 log_debug("if_act_reset: error killing neighbor %s", 622 inet_ntoa(nbr->id)); 623 } 624 } 625 626 iface->dr = NULL; 627 iface->bdr = NULL; 628 629 ls_ack_list_clr(iface); 630 stop_ls_ack_tx_timer(iface); 631 if_stop_hello_timer(iface); 632 if_stop_wait_timer(iface); 633 634 /* send empty hello to tell everybody that we are going down */ 635 send_hello(iface); 636 637 return (0); 638 } 639 640 struct ctl_iface * 641 if_to_ctl(struct iface *iface) 642 { 643 static struct ctl_iface ictl; 644 struct timeval tv, now, res; 645 struct nbr *nbr; 646 647 memcpy(ictl.name, iface->name, sizeof(ictl.name)); 648 memcpy(&ictl.addr, &iface->addr, sizeof(ictl.addr)); 649 ictl.rtr_id.s_addr = ospfe_router_id(); 650 memcpy(&ictl.area, &iface->area->id, sizeof(ictl.area)); 651 if (iface->dr) { 652 memcpy(&ictl.dr_id, &iface->dr->id, sizeof(ictl.dr_id)); 653 memcpy(&ictl.dr_addr, &iface->dr->addr, sizeof(ictl.dr_addr)); 654 } else { 655 bzero(&ictl.dr_id, sizeof(ictl.dr_id)); 656 bzero(&ictl.dr_addr, sizeof(ictl.dr_addr)); 657 } 658 if (iface->bdr) { 659 memcpy(&ictl.bdr_id, &iface->bdr->id, sizeof(ictl.bdr_id)); 660 memcpy(&ictl.bdr_addr, &iface->bdr->addr, 661 sizeof(ictl.bdr_addr)); 662 } else { 663 bzero(&ictl.bdr_id, sizeof(ictl.bdr_id)); 664 bzero(&ictl.bdr_addr, sizeof(ictl.bdr_addr)); 665 } 666 ictl.ifindex = iface->ifindex; 667 ictl.state = iface->state; 668 ictl.mtu = iface->mtu; 669 ictl.nbr_cnt = 0; 670 ictl.adj_cnt = 0; 671 ictl.baudrate = iface->baudrate; 672 ictl.dead_interval = iface->dead_interval; 673 ictl.transmit_delay = iface->transmit_delay; 674 ictl.hello_interval = iface->hello_interval; 675 ictl.flags = iface->flags; 676 ictl.metric = iface->metric; 677 ictl.rxmt_interval = iface->rxmt_interval; 678 ictl.type = iface->type; 679 ictl.linkstate = iface->linkstate; 680 ictl.if_type = iface->if_type; 681 ictl.priority = iface->priority; 682 ictl.passive = (iface->cflags & F_IFACE_PASSIVE) == F_IFACE_PASSIVE; 683 684 gettimeofday(&now, NULL); 685 if (evtimer_pending(&iface->hello_timer, &tv)) { 686 timersub(&tv, &now, &res); 687 ictl.hello_timer = res.tv_sec; 688 } else 689 ictl.hello_timer = -1; 690 691 if (iface->state != IF_STA_DOWN) { 692 ictl.uptime = now.tv_sec - iface->uptime; 693 } else 694 ictl.uptime = 0; 695 696 LIST_FOREACH(nbr, &iface->nbr_list, entry) { 697 if (nbr == iface->self) 698 continue; 699 ictl.nbr_cnt++; 700 if (nbr->state & NBR_STA_ADJFORM) 701 ictl.adj_cnt++; 702 } 703 704 return (&ictl); 705 } 706 707 /* misc */ 708 void 709 if_set_sockbuf(int fd) 710 { 711 int bsize; 712 713 bsize = 256 * 1024; 714 while (setsockopt(fd, SOL_SOCKET, SO_RCVBUF, &bsize, 715 sizeof(bsize)) == -1) 716 bsize /= 2; 717 718 if (bsize != 256 * 1024) 719 log_warnx("if_set_sockbuf: recvbuf size only %d", bsize); 720 721 bsize = 64 * 1024; 722 while (setsockopt(fd, SOL_SOCKET, SO_SNDBUF, &bsize, 723 sizeof(bsize)) == -1) 724 bsize /= 2; 725 726 if (bsize != 64 * 1024) 727 log_warnx("if_set_sockbuf: sendbuf size only %d", bsize); 728 } 729 730 int 731 if_join_group(struct iface *iface, struct in6_addr *addr) 732 { 733 struct ipv6_mreq mreq; 734 735 switch (iface->type) { 736 case IF_TYPE_POINTOPOINT: 737 case IF_TYPE_BROADCAST: 738 log_debug("if_join_group: interface %s addr %s", 739 iface->name, log_in6addr(addr)); 740 mreq.ipv6mr_multiaddr = *addr; 741 mreq.ipv6mr_interface = iface->ifindex; 742 743 if (setsockopt(iface->fd, IPPROTO_IPV6, IPV6_JOIN_GROUP, 744 &mreq, sizeof(mreq)) == -1) { 745 log_warn("if_join_group: error IPV6_JOIN_GROUP, " 746 "interface %s address %s", iface->name, 747 log_in6addr(addr)); 748 return (-1); 749 } 750 break; 751 case IF_TYPE_POINTOMULTIPOINT: 752 case IF_TYPE_VIRTUALLINK: 753 case IF_TYPE_NBMA: 754 log_debug("if_join_group: type %s not supported, interface %s", 755 if_type_name(iface->type), iface->name); 756 return (-1); 757 default: 758 fatalx("if_join_group: unknown interface type"); 759 } 760 761 return (0); 762 } 763 764 int 765 if_leave_group(struct iface *iface, struct in6_addr *addr) 766 { 767 struct ipv6_mreq mreq; 768 769 switch (iface->type) { 770 case IF_TYPE_POINTOPOINT: 771 case IF_TYPE_BROADCAST: 772 log_debug("if_leave_group: interface %s addr %s", 773 iface->name, log_in6addr(addr)); 774 mreq.ipv6mr_multiaddr = *addr; 775 mreq.ipv6mr_interface = iface->ifindex; 776 777 if (setsockopt(iface->fd, IPPROTO_IPV6, IPV6_LEAVE_GROUP, 778 (void *)&mreq, sizeof(mreq)) == -1) { 779 log_warn("if_leave_group: error IPV6_LEAVE_GROUP, " 780 "interface %s address %s", iface->name, 781 log_in6addr(addr)); 782 return (-1); 783 } 784 break; 785 case IF_TYPE_POINTOMULTIPOINT: 786 case IF_TYPE_VIRTUALLINK: 787 case IF_TYPE_NBMA: 788 log_debug("if_leave_group: type %s not supported, interface %s", 789 if_type_name(iface->type), iface->name); 790 return (-1); 791 default: 792 fatalx("if_leave_group: unknown interface type"); 793 } 794 return (0); 795 } 796 797 int 798 if_set_mcast(struct iface *iface) 799 { 800 switch (iface->type) { 801 case IF_TYPE_POINTOPOINT: 802 case IF_TYPE_BROADCAST: 803 if (setsockopt(iface->fd, IPPROTO_IPV6, IPV6_MULTICAST_IF, 804 &iface->ifindex, sizeof(iface->ifindex)) == -1) { 805 log_debug("if_set_mcast: error setting " 806 "IP_MULTICAST_IF, interface %s", iface->name); 807 return (-1); 808 } 809 break; 810 case IF_TYPE_POINTOMULTIPOINT: 811 case IF_TYPE_VIRTUALLINK: 812 case IF_TYPE_NBMA: 813 log_debug("if_set_mcast: type %s not supported, interface %s", 814 if_type_name(iface->type), iface->name); 815 return (-1); 816 default: 817 fatalx("if_set_mcast: unknown interface type"); 818 } 819 820 return (0); 821 } 822 823 int 824 if_set_mcast_loop(int fd) 825 { 826 u_int loop = 0; 827 828 if (setsockopt(fd, IPPROTO_IPV6, IPV6_MULTICAST_LOOP, 829 (u_int *)&loop, sizeof(loop)) == -1) { 830 log_warn("if_set_mcast_loop: error setting " 831 "IPV6_MULTICAST_LOOP"); 832 return (-1); 833 } 834 835 return (0); 836 } 837 838 int 839 if_set_ipv6_pktinfo(int fd, int enable) 840 { 841 if (setsockopt(fd, IPPROTO_IPV6, IPV6_RECVPKTINFO, &enable, 842 sizeof(enable)) == -1) { 843 log_warn("if_set_ipv6_pktinfo: error setting IPV6_PKTINFO"); 844 return (-1); 845 } 846 847 return (0); 848 } 849 850 int 851 if_set_ipv6_checksum(int fd) 852 { 853 int offset = offsetof(struct ospf_hdr, chksum); 854 855 log_debug("if_set_ipv6_checksum setting cksum offset to %d", offset); 856 if (setsockopt(fd, IPPROTO_IPV6, IPV6_CHECKSUM, &offset, 857 sizeof(offset)) == -1) { 858 log_warn("if_set_ipv6_checksum: error setting IPV6_CHECKSUM"); 859 return (-1); 860 } 861 return (0); 862 } 863