1 /* $OpenBSD: interface.c,v 1.24 2018/07/12 13:45:03 remi 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 #if 0 72 /* TODO virtual links */ 73 static int vlink_cnt = 0; 74 #endif 75 76 TAILQ_HEAD(, iface) iflist; 77 78 const char * const if_event_names[] = { 79 "NOTHING", 80 "UP", 81 "WAITTIMER", 82 "BACKUPSEEN", 83 "NEIGHBORCHANGE", 84 "LOOP", 85 "UNLOOP", 86 "DOWN" 87 }; 88 89 const char * const if_action_names[] = { 90 "NOTHING", 91 "START", 92 "ELECT", 93 "RESET" 94 }; 95 96 int 97 if_fsm(struct iface *iface, enum iface_event event) 98 { 99 int old_state; 100 int new_state = 0; 101 int i, ret = 0; 102 103 old_state = iface->state; 104 105 for (i = 0; iface_fsm[i].state != -1; i++) 106 if ((iface_fsm[i].state & old_state) && 107 (iface_fsm[i].event == event)) { 108 new_state = iface_fsm[i].new_state; 109 break; 110 } 111 112 if (iface_fsm[i].state == -1) { 113 /* event outside of the defined fsm, ignore it. */ 114 log_debug("if_fsm: interface %s, " 115 "event %s not expected in state %s", iface->name, 116 if_event_names[event], if_state_name(old_state)); 117 return (0); 118 } 119 120 switch (iface_fsm[i].action) { 121 case IF_ACT_STRT: 122 ret = if_act_start(iface); 123 break; 124 case IF_ACT_ELECT: 125 ret = if_act_elect(iface); 126 break; 127 case IF_ACT_RST: 128 ret = if_act_reset(iface); 129 break; 130 case IF_ACT_NOTHING: 131 /* do nothing */ 132 break; 133 } 134 135 if (ret) { 136 log_debug("if_fsm: error changing state for interface %s, " 137 "event %s, state %s", iface->name, if_event_names[event], 138 if_state_name(old_state)); 139 return (-1); 140 } 141 142 if (new_state != 0) 143 iface->state = new_state; 144 145 if (iface->state != old_state) { 146 orig_rtr_lsa(iface); 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 /* ARGSUSED */ 307 void 308 if_hello_timer(int fd, short event, void *arg) 309 { 310 struct iface *iface = arg; 311 struct timeval tv; 312 313 send_hello(iface); 314 315 /* reschedule hello_timer */ 316 timerclear(&tv); 317 tv.tv_sec = iface->hello_interval; 318 if (evtimer_add(&iface->hello_timer, &tv) == -1) 319 fatal("if_hello_timer"); 320 } 321 322 void 323 if_start_hello_timer(struct iface *iface) 324 { 325 struct timeval tv; 326 327 timerclear(&tv); 328 if (evtimer_add(&iface->hello_timer, &tv) == -1) 329 fatal("if_start_hello_timer"); 330 } 331 332 void 333 if_stop_hello_timer(struct iface *iface) 334 { 335 if (evtimer_del(&iface->hello_timer) == -1) 336 fatal("if_stop_hello_timer"); 337 } 338 339 /* ARGSUSED */ 340 void 341 if_wait_timer(int fd, short event, void *arg) 342 { 343 struct iface *iface = arg; 344 345 if_fsm(iface, IF_EVT_WTIMER); 346 } 347 348 void 349 if_start_wait_timer(struct iface *iface) 350 { 351 struct timeval tv; 352 353 timerclear(&tv); 354 tv.tv_sec = iface->dead_interval; 355 if (evtimer_add(&iface->wait_timer, &tv) == -1) 356 fatal("if_start_wait_timer"); 357 } 358 359 void 360 if_stop_wait_timer(struct iface *iface) 361 { 362 if (evtimer_del(&iface->wait_timer) == -1) 363 fatal("if_stop_wait_timer"); 364 } 365 366 /* actions */ 367 int 368 if_act_start(struct iface *iface) 369 { 370 struct in6_addr addr; 371 struct timeval now; 372 373 if (!((iface->flags & IFF_UP) && 374 LINK_STATE_IS_UP(iface->linkstate))) { 375 log_debug("if_act_start: interface %s link down", 376 iface->name); 377 return (0); 378 } 379 380 if (iface->if_type == IFT_CARP && 381 !(iface->cflags & F_IFACE_PASSIVE)) { 382 /* force passive mode on carp interfaces */ 383 log_warnx("if_act_start: forcing interface %s to passive", 384 iface->name); 385 iface->cflags |= F_IFACE_PASSIVE; 386 } 387 388 gettimeofday(&now, NULL); 389 iface->uptime = now.tv_sec; 390 391 /* loopback interfaces have a special state */ 392 if (iface->flags & IFF_LOOPBACK) 393 iface->state = IF_STA_LOOPBACK; 394 395 if (iface->cflags & F_IFACE_PASSIVE) { 396 /* for an update of stub network entries */ 397 orig_rtr_lsa(iface); 398 return (0); 399 } 400 401 switch (iface->type) { 402 case IF_TYPE_POINTOPOINT: 403 inet_pton(AF_INET6, AllSPFRouters, &addr); 404 405 if (if_join_group(iface, &addr)) 406 return (-1); 407 iface->state = IF_STA_POINTTOPOINT; 408 break; 409 case IF_TYPE_VIRTUALLINK: 410 iface->state = IF_STA_POINTTOPOINT; 411 break; 412 case IF_TYPE_POINTOMULTIPOINT: 413 case IF_TYPE_NBMA: 414 log_debug("if_act_start: type %s not supported, interface %s", 415 if_type_name(iface->type), iface->name); 416 return (-1); 417 case IF_TYPE_BROADCAST: 418 inet_pton(AF_INET6, AllSPFRouters, &addr); 419 420 if (if_join_group(iface, &addr)) 421 return (-1); 422 if (iface->priority == 0) { 423 iface->state = IF_STA_DROTHER; 424 } else { 425 iface->state = IF_STA_WAITING; 426 if_start_wait_timer(iface); 427 } 428 break; 429 default: 430 fatalx("if_act_start: unknown interface type"); 431 } 432 433 /* hello timer needs to be started in any case */ 434 if_start_hello_timer(iface); 435 return (0); 436 } 437 438 struct nbr * 439 if_elect(struct nbr *a, struct nbr *b) 440 { 441 if (a->priority > b->priority) 442 return (a); 443 if (a->priority < b->priority) 444 return (b); 445 if (ntohl(a->id.s_addr) > ntohl(b->id.s_addr)) 446 return (a); 447 return (b); 448 } 449 450 int 451 if_act_elect(struct iface *iface) 452 { 453 struct in6_addr addr; 454 struct nbr *nbr, *bdr = NULL, *dr = NULL; 455 int round = 0; 456 int changed = 0; 457 int old_state; 458 char b1[16], b2[16], b3[16], b4[16]; 459 460 start: 461 /* elect backup designated router */ 462 LIST_FOREACH(nbr, &iface->nbr_list, entry) { 463 if (nbr->priority == 0 || nbr == dr || /* not electable */ 464 nbr->state & NBR_STA_PRELIM || /* not available */ 465 nbr->dr.s_addr == nbr->id.s_addr) /* don't elect DR */ 466 continue; 467 if (bdr != NULL) { 468 /* 469 * routers announcing themselves as BDR have higher 470 * precedence over those routers announcing a 471 * different BDR. 472 */ 473 if (nbr->bdr.s_addr == nbr->id.s_addr) { 474 if (bdr->bdr.s_addr == bdr->id.s_addr) 475 bdr = if_elect(bdr, nbr); 476 else 477 bdr = nbr; 478 } else if (bdr->bdr.s_addr != bdr->id.s_addr) 479 bdr = if_elect(bdr, nbr); 480 } else 481 bdr = nbr; 482 } 483 484 /* elect designated router */ 485 LIST_FOREACH(nbr, &iface->nbr_list, entry) { 486 if (nbr->priority == 0 || nbr->state & NBR_STA_PRELIM || 487 (nbr != dr && nbr->dr.s_addr != nbr->id.s_addr)) 488 /* only DR may be elected check priority too */ 489 continue; 490 if (dr == NULL) 491 dr = nbr; 492 else 493 dr = if_elect(dr, nbr); 494 } 495 496 if (dr == NULL) { 497 /* no designate router found use backup DR */ 498 dr = bdr; 499 bdr = NULL; 500 } 501 502 /* 503 * if we are involved in the election (e.g. new DR or no 504 * longer BDR) redo the election 505 */ 506 if (round == 0 && 507 ((iface->self == dr && iface->self != iface->dr) || 508 (iface->self != dr && iface->self == iface->dr) || 509 (iface->self == bdr && iface->self != iface->bdr) || 510 (iface->self != bdr && iface->self == iface->bdr))) { 511 /* 512 * Reset announced DR/BDR to calculated one, so 513 * that we may get elected in the second round. 514 * This is needed to drop from a DR to a BDR. 515 */ 516 iface->self->dr.s_addr = dr->id.s_addr; 517 if (bdr) 518 iface->self->bdr.s_addr = bdr->id.s_addr; 519 round = 1; 520 goto start; 521 } 522 523 log_debug("if_act_elect: interface %s old dr %s new dr %s, " 524 "old bdr %s new bdr %s", iface->name, 525 iface->dr ? inet_ntop(AF_INET, &iface->dr->id, b1, sizeof(b1)) : 526 "none", dr ? inet_ntop(AF_INET, &dr->id, b2, sizeof(b2)) : "none", 527 iface->bdr ? inet_ntop(AF_INET, &iface->bdr->id, b3, sizeof(b3)) : 528 "none", bdr ? inet_ntop(AF_INET, &bdr->id, b4, sizeof(b4)) : 529 "none"); 530 531 /* 532 * After the second round still DR or BDR change state to DR or BDR, 533 * etc. 534 */ 535 old_state = iface->state; 536 if (dr == iface->self) 537 iface->state = IF_STA_DR; 538 else if (bdr == iface->self) 539 iface->state = IF_STA_BACKUP; 540 else 541 iface->state = IF_STA_DROTHER; 542 543 /* TODO if iface is NBMA send all non eligible neighbors event Start */ 544 545 /* 546 * if DR or BDR changed issue a AdjOK? event for all neighbors > 2-Way 547 */ 548 if (iface->dr != dr || iface->bdr != bdr) 549 changed = 1; 550 551 iface->dr = dr; 552 iface->bdr = bdr; 553 554 if (changed) { 555 inet_pton(AF_INET6, AllDRouters, &addr); 556 if (old_state & IF_STA_DRORBDR && 557 (iface->state & IF_STA_DRORBDR) == 0) { 558 if (if_leave_group(iface, &addr)) 559 return (-1); 560 } else if ((old_state & IF_STA_DRORBDR) == 0 && 561 iface->state & IF_STA_DRORBDR) { 562 if (if_join_group(iface, &addr)) 563 return (-1); 564 } 565 566 LIST_FOREACH(nbr, &iface->nbr_list, entry) { 567 if (nbr->state & NBR_STA_BIDIR) 568 nbr_fsm(nbr, NBR_EVT_ADJ_OK); 569 } 570 571 orig_rtr_lsa(iface); 572 if (iface->state & IF_STA_DR || old_state & IF_STA_DR) 573 orig_net_lsa(iface); 574 } 575 576 if_start_hello_timer(iface); 577 return (0); 578 } 579 580 int 581 if_act_reset(struct iface *iface) 582 { 583 struct nbr *nbr = NULL; 584 struct in6_addr addr; 585 586 if (iface->cflags & F_IFACE_PASSIVE) { 587 /* for an update of stub network entries */ 588 orig_rtr_lsa(iface); 589 return (0); 590 } 591 592 switch (iface->type) { 593 case IF_TYPE_POINTOPOINT: 594 case IF_TYPE_BROADCAST: 595 inet_pton(AF_INET6, AllSPFRouters, &addr); 596 if (if_leave_group(iface, &addr)) { 597 log_warnx("if_act_reset: error leaving group %s, " 598 "interface %s", log_in6addr(&addr), iface->name); 599 } 600 if (iface->state & IF_STA_DRORBDR) { 601 inet_pton(AF_INET6, AllDRouters, &addr); 602 if (if_leave_group(iface, &addr)) { 603 log_warnx("if_act_reset: " 604 "error leaving group %s, interface %s", 605 log_in6addr(&addr), iface->name); 606 } 607 } 608 break; 609 case IF_TYPE_VIRTUALLINK: 610 /* nothing */ 611 break; 612 case IF_TYPE_NBMA: 613 case IF_TYPE_POINTOMULTIPOINT: 614 log_debug("if_act_reset: type %s not supported, interface %s", 615 if_type_name(iface->type), iface->name); 616 return (-1); 617 default: 618 fatalx("if_act_reset: unknown interface type"); 619 } 620 621 LIST_FOREACH(nbr, &iface->nbr_list, entry) { 622 if (nbr_fsm(nbr, NBR_EVT_KILL_NBR)) { 623 log_debug("if_act_reset: error killing neighbor %s", 624 inet_ntoa(nbr->id)); 625 } 626 } 627 628 iface->dr = NULL; 629 iface->bdr = NULL; 630 631 ls_ack_list_clr(iface); 632 stop_ls_ack_tx_timer(iface); 633 if_stop_hello_timer(iface); 634 if_stop_wait_timer(iface); 635 636 /* send empty hello to tell everybody that we are going down */ 637 send_hello(iface); 638 639 return (0); 640 } 641 642 struct ctl_iface * 643 if_to_ctl(struct iface *iface) 644 { 645 static struct ctl_iface ictl; 646 struct timeval tv, now, res; 647 struct nbr *nbr; 648 649 memcpy(ictl.name, iface->name, sizeof(ictl.name)); 650 memcpy(&ictl.addr, &iface->addr, sizeof(ictl.addr)); 651 ictl.rtr_id.s_addr = ospfe_router_id(); 652 memcpy(&ictl.area, &iface->area_id, sizeof(ictl.area)); 653 if (iface->dr) { 654 memcpy(&ictl.dr_id, &iface->dr->id, sizeof(ictl.dr_id)); 655 memcpy(&ictl.dr_addr, &iface->dr->addr, sizeof(ictl.dr_addr)); 656 } else { 657 bzero(&ictl.dr_id, sizeof(ictl.dr_id)); 658 bzero(&ictl.dr_addr, sizeof(ictl.dr_addr)); 659 } 660 if (iface->bdr) { 661 memcpy(&ictl.bdr_id, &iface->bdr->id, sizeof(ictl.bdr_id)); 662 memcpy(&ictl.bdr_addr, &iface->bdr->addr, 663 sizeof(ictl.bdr_addr)); 664 } else { 665 bzero(&ictl.bdr_id, sizeof(ictl.bdr_id)); 666 bzero(&ictl.bdr_addr, sizeof(ictl.bdr_addr)); 667 } 668 ictl.ifindex = iface->ifindex; 669 ictl.state = iface->state; 670 ictl.mtu = iface->mtu; 671 ictl.nbr_cnt = 0; 672 ictl.adj_cnt = 0; 673 ictl.baudrate = iface->baudrate; 674 ictl.dead_interval = iface->dead_interval; 675 ictl.transmit_delay = iface->transmit_delay; 676 ictl.hello_interval = iface->hello_interval; 677 ictl.flags = iface->flags; 678 ictl.metric = iface->metric; 679 ictl.rxmt_interval = iface->rxmt_interval; 680 ictl.type = iface->type; 681 ictl.linkstate = iface->linkstate; 682 ictl.if_type = iface->if_type; 683 ictl.priority = iface->priority; 684 ictl.passive = (iface->cflags & F_IFACE_PASSIVE) == F_IFACE_PASSIVE; 685 686 gettimeofday(&now, NULL); 687 if (evtimer_pending(&iface->hello_timer, &tv)) { 688 timersub(&tv, &now, &res); 689 ictl.hello_timer = res.tv_sec; 690 } else 691 ictl.hello_timer = -1; 692 693 if (iface->state != IF_STA_DOWN) { 694 ictl.uptime = now.tv_sec - iface->uptime; 695 } else 696 ictl.uptime = 0; 697 698 LIST_FOREACH(nbr, &iface->nbr_list, entry) { 699 if (nbr == iface->self) 700 continue; 701 ictl.nbr_cnt++; 702 if (nbr->state & NBR_STA_ADJFORM) 703 ictl.adj_cnt++; 704 } 705 706 return (&ictl); 707 } 708 709 /* misc */ 710 void 711 if_set_recvbuf(int fd) 712 { 713 int bsize; 714 715 bsize = 256 * 1024; 716 while (setsockopt(fd, SOL_SOCKET, SO_RCVBUF, &bsize, 717 sizeof(bsize)) == -1) 718 bsize /= 2; 719 720 if (bsize != 256 * 1024) 721 log_warnx("if_set_recvbuf: recvbuf size only %d", bsize); 722 } 723 724 int 725 if_join_group(struct iface *iface, struct in6_addr *addr) 726 { 727 struct ipv6_mreq mreq; 728 729 switch (iface->type) { 730 case IF_TYPE_POINTOPOINT: 731 case IF_TYPE_BROADCAST: 732 log_debug("if_join_group: interface %s addr %s", 733 iface->name, log_in6addr(addr)); 734 mreq.ipv6mr_multiaddr = *addr; 735 mreq.ipv6mr_interface = iface->ifindex; 736 737 if (setsockopt(iface->fd, IPPROTO_IPV6, IPV6_JOIN_GROUP, 738 &mreq, sizeof(mreq)) < 0) { 739 log_warn("if_join_group: error IPV6_JOIN_GROUP, " 740 "interface %s address %s", iface->name, 741 log_in6addr(addr)); 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_join_group: type %s not supported, interface %s", 749 if_type_name(iface->type), iface->name); 750 return (-1); 751 default: 752 fatalx("if_join_group: unknown interface type"); 753 } 754 755 return (0); 756 } 757 758 int 759 if_leave_group(struct iface *iface, struct in6_addr *addr) 760 { 761 struct ipv6_mreq mreq; 762 763 switch (iface->type) { 764 case IF_TYPE_POINTOPOINT: 765 case IF_TYPE_BROADCAST: 766 log_debug("if_leave_group: interface %s addr %s", 767 iface->name, log_in6addr(addr)); 768 mreq.ipv6mr_multiaddr = *addr; 769 mreq.ipv6mr_interface = iface->ifindex; 770 771 if (setsockopt(iface->fd, IPPROTO_IPV6, IPV6_LEAVE_GROUP, 772 (void *)&mreq, sizeof(mreq)) < 0) { 773 log_warn("if_leave_group: error IPV6_LEAVE_GROUP, " 774 "interface %s address %s", iface->name, 775 log_in6addr(addr)); 776 return (-1); 777 } 778 break; 779 case IF_TYPE_POINTOMULTIPOINT: 780 case IF_TYPE_VIRTUALLINK: 781 case IF_TYPE_NBMA: 782 log_debug("if_leave_group: type %s not supported, interface %s", 783 if_type_name(iface->type), iface->name); 784 return (-1); 785 default: 786 fatalx("if_leave_group: unknown interface type"); 787 } 788 return (0); 789 } 790 791 int 792 if_set_mcast(struct iface *iface) 793 { 794 switch (iface->type) { 795 case IF_TYPE_POINTOPOINT: 796 case IF_TYPE_BROADCAST: 797 if (setsockopt(iface->fd, IPPROTO_IPV6, IPV6_MULTICAST_IF, 798 &iface->ifindex, sizeof(iface->ifindex)) < 0) { 799 log_debug("if_set_mcast: error setting " 800 "IP_MULTICAST_IF, interface %s", iface->name); 801 return (-1); 802 } 803 break; 804 case IF_TYPE_POINTOMULTIPOINT: 805 case IF_TYPE_VIRTUALLINK: 806 case IF_TYPE_NBMA: 807 log_debug("if_set_mcast: type %s not supported, interface %s", 808 if_type_name(iface->type), iface->name); 809 return (-1); 810 default: 811 fatalx("if_set_mcast: unknown interface type"); 812 } 813 814 return (0); 815 } 816 817 int 818 if_set_mcast_loop(int fd) 819 { 820 u_int loop = 0; 821 822 if (setsockopt(fd, IPPROTO_IPV6, IPV6_MULTICAST_LOOP, 823 (u_int *)&loop, sizeof(loop)) < 0) { 824 log_warn("if_set_mcast_loop: error setting " 825 "IPV6_MULTICAST_LOOP"); 826 return (-1); 827 } 828 829 return (0); 830 } 831 832 int 833 if_set_ipv6_pktinfo(int fd, int enable) 834 { 835 if (setsockopt(fd, IPPROTO_IPV6, IPV6_RECVPKTINFO, &enable, 836 sizeof(enable)) < 0) { 837 log_warn("if_set_ipv6_pktinfo: error setting IPV6_PKTINFO"); 838 return (-1); 839 } 840 841 return (0); 842 } 843 844 int 845 if_set_ipv6_checksum(int fd) 846 { 847 int offset = offsetof(struct ospf_hdr, chksum); 848 849 log_debug("if_set_ipv6_checksum setting cksum offset to %d", offset); 850 if (setsockopt(fd, IPPROTO_IPV6, IPV6_CHECKSUM, &offset, 851 sizeof(offset)) < 0) { 852 log_warn("if_set_ipv6_checksum: error setting IPV6_CHECKSUM"); 853 return (-1); 854 } 855 return (0); 856 } 857