1 /* $OpenBSD: ospf6d.c,v 1.39 2018/09/01 19:21:10 remi Exp $ */ 2 3 /* 4 * Copyright (c) 2005 Claudio Jeker <claudio@openbsd.org> 5 * Copyright (c) 2004, 2007 Esben Norby <norby@openbsd.org> 6 * Copyright (c) 2003, 2004 Henning Brauer <henning@openbsd.org> 7 * 8 * Permission to use, copy, modify, and distribute this software for any 9 * purpose with or without fee is hereby granted, provided that the above 10 * copyright notice and this permission notice appear in all copies. 11 * 12 * THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES 13 * WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF 14 * MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR 15 * ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES 16 * WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN 17 * ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF 18 * OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE. 19 */ 20 21 #include <sys/types.h> 22 #include <sys/socket.h> 23 #include <sys/queue.h> 24 #include <sys/time.h> 25 #include <sys/stat.h> 26 #include <sys/wait.h> 27 #include <sys/sysctl.h> 28 #include <syslog.h> 29 30 #include <netinet/in.h> 31 #include <arpa/inet.h> 32 #include <net/if_types.h> 33 34 #include <event.h> 35 #include <err.h> 36 #include <errno.h> 37 #include <pwd.h> 38 #include <stdio.h> 39 #include <stdlib.h> 40 #include <string.h> 41 #include <signal.h> 42 #include <unistd.h> 43 44 #include "ospf6d.h" 45 #include "ospf6.h" 46 #include "ospfe.h" 47 #include "control.h" 48 #include "log.h" 49 #include "rde.h" 50 51 void main_sig_handler(int, short, void *); 52 __dead void usage(void); 53 __dead void ospfd_shutdown(void); 54 55 void main_dispatch_ospfe(int, short, void *); 56 void main_dispatch_rde(int, short, void *); 57 58 int ospf_reload(void); 59 int ospf_sendboth(enum imsg_type, void *, u_int16_t); 60 int merge_interfaces(struct area *, struct area *); 61 struct iface *iface_lookup(struct area *, struct iface *); 62 63 int pipe_parent2ospfe[2]; 64 int pipe_parent2rde[2]; 65 int pipe_ospfe2rde[2]; 66 67 struct ospfd_conf *ospfd_conf = NULL; 68 struct imsgev *iev_ospfe; 69 struct imsgev *iev_rde; 70 char *conffile; 71 72 pid_t ospfe_pid = 0; 73 pid_t rde_pid = 0; 74 75 /* ARGSUSED */ 76 void 77 main_sig_handler(int sig, short event, void *arg) 78 { 79 /* signal handler rules don't apply, libevent decouples for us */ 80 switch (sig) { 81 case SIGTERM: 82 case SIGINT: 83 ospfd_shutdown(); 84 /* NOTREACHED */ 85 case SIGHUP: 86 if (ospf_reload() == -1) 87 log_warnx("configuration reload failed"); 88 else 89 log_debug("configuration reloaded"); 90 break; 91 default: 92 fatalx("unexpected signal"); 93 /* NOTREACHED */ 94 } 95 } 96 97 __dead void 98 usage(void) 99 { 100 extern char *__progname; 101 102 fprintf(stderr, "usage: %s [-dnv] [-D macro=value]" 103 " [-f file] [-s socket]\n", 104 __progname); 105 exit(1); 106 } 107 108 int 109 main(int argc, char *argv[]) 110 { 111 struct event ev_sigint, ev_sigterm, ev_sighup; 112 int ch, opts = 0; 113 int debug = 0; 114 int ipforwarding; 115 int mib[4]; 116 size_t len; 117 char *sockname = NULL; 118 int control_fd; 119 120 conffile = CONF_FILE; 121 ospfd_process = PROC_MAIN; 122 123 log_init(1, LOG_DAEMON); /* log to stderr until daemonized */ 124 log_procinit(log_procnames[ospfd_process]); 125 126 while ((ch = getopt(argc, argv, "cdD:f:s:nv")) != -1) { 127 switch (ch) { 128 case 'c': 129 opts |= OSPFD_OPT_FORCE_DEMOTE; 130 break; 131 case 'd': 132 debug = 1; 133 break; 134 case 'D': 135 if (cmdline_symset(optarg) < 0) 136 log_warnx("could not parse macro definition %s", 137 optarg); 138 break; 139 case 'f': 140 conffile = optarg; 141 break; 142 case 'n': 143 opts |= OSPFD_OPT_NOACTION; 144 break; 145 case 's': 146 sockname = optarg; 147 break; 148 case 'v': 149 if (opts & OSPFD_OPT_VERBOSE) 150 opts |= OSPFD_OPT_VERBOSE2; 151 opts |= OSPFD_OPT_VERBOSE; 152 log_setverbose(1); 153 break; 154 default: 155 usage(); 156 /* NOTREACHED */ 157 } 158 } 159 160 argc -= optind; 161 argv += optind; 162 if (argc > 0) 163 usage(); 164 165 mib[0] = CTL_NET; 166 mib[1] = PF_INET6; 167 mib[2] = IPPROTO_IPV6; 168 mib[3] = IPCTL_FORWARDING; 169 len = sizeof(ipforwarding); 170 if (sysctl(mib, 4, &ipforwarding, &len, NULL, 0) == -1) 171 err(1, "sysctl"); 172 173 if (ipforwarding != 1) { 174 log_warnx("WARNING: IPv6 forwarding NOT enabled, " 175 "running as stub router"); 176 opts |= OSPFD_OPT_STUB_ROUTER; 177 } 178 179 /* prepare and fetch interfaces early */ 180 if_init(); 181 182 /* parse config file */ 183 if ((ospfd_conf = parse_config(conffile, opts)) == NULL ) 184 exit(1); 185 186 if (sockname == NULL) { 187 if (asprintf(&sockname, "%s.%d", OSPF6D_SOCKET, 188 ospfd_conf->rdomain) == -1) 189 err(1, "asprintf"); 190 } 191 192 ospfd_conf->csock = sockname; 193 194 if (ospfd_conf->opts & OSPFD_OPT_NOACTION) { 195 if (ospfd_conf->opts & OSPFD_OPT_VERBOSE) 196 print_config(ospfd_conf); 197 else 198 fprintf(stderr, "configuration OK\n"); 199 exit(0); 200 } 201 202 /* check for root privileges */ 203 if (geteuid()) 204 errx(1, "need root privileges"); 205 206 /* check for ospfd user */ 207 if (getpwnam(OSPF6D_USER) == NULL) 208 errx(1, "unknown user %s", OSPF6D_USER); 209 210 log_init(debug, LOG_DAEMON); 211 log_setverbose(ospfd_conf->opts & OSPFD_OPT_VERBOSE); 212 213 if ((control_check(ospfd_conf->csock)) == -1) 214 fatalx("control socket check failed"); 215 216 if (!debug) 217 daemon(1, 0); 218 219 log_info("startup"); 220 221 if (socketpair(AF_UNIX, SOCK_STREAM | SOCK_CLOEXEC | SOCK_NONBLOCK, 222 PF_UNSPEC, pipe_parent2ospfe) == -1) 223 fatal("socketpair"); 224 if (socketpair(AF_UNIX, SOCK_STREAM | SOCK_CLOEXEC | SOCK_NONBLOCK, 225 PF_UNSPEC, pipe_parent2rde) == -1) 226 fatal("socketpair"); 227 if (socketpair(AF_UNIX, SOCK_STREAM | SOCK_CLOEXEC | SOCK_NONBLOCK, 228 PF_UNSPEC, pipe_ospfe2rde) == -1) 229 fatal("socketpair"); 230 231 /* start children */ 232 rde_pid = rde(ospfd_conf, pipe_parent2rde, pipe_ospfe2rde, 233 pipe_parent2ospfe); 234 ospfe_pid = ospfe(ospfd_conf, pipe_parent2ospfe, pipe_ospfe2rde, 235 pipe_parent2rde); 236 237 event_init(); 238 239 /* setup signal handler */ 240 signal_set(&ev_sigint, SIGINT, main_sig_handler, NULL); 241 signal_set(&ev_sigterm, SIGTERM, main_sig_handler, NULL); 242 signal_set(&ev_sighup, SIGHUP, main_sig_handler, NULL); 243 signal_add(&ev_sigint, NULL); 244 signal_add(&ev_sigterm, NULL); 245 signal_add(&ev_sighup, NULL); 246 signal(SIGPIPE, SIG_IGN); 247 248 /* setup pipes to children */ 249 close(pipe_parent2ospfe[1]); 250 close(pipe_parent2rde[1]); 251 close(pipe_ospfe2rde[0]); 252 close(pipe_ospfe2rde[1]); 253 254 if ((iev_ospfe = malloc(sizeof(struct imsgev))) == NULL || 255 (iev_rde = malloc(sizeof(struct imsgev))) == NULL) 256 fatal(NULL); 257 imsg_init(&iev_ospfe->ibuf, pipe_parent2ospfe[0]); 258 iev_ospfe->handler = main_dispatch_ospfe; 259 imsg_init(&iev_rde->ibuf, pipe_parent2rde[0]); 260 iev_rde->handler = main_dispatch_rde; 261 262 /* setup event handler */ 263 iev_ospfe->events = EV_READ; 264 event_set(&iev_ospfe->ev, iev_ospfe->ibuf.fd, iev_ospfe->events, 265 iev_ospfe->handler, iev_ospfe); 266 event_add(&iev_ospfe->ev, NULL); 267 268 iev_rde->events = EV_READ; 269 event_set(&iev_rde->ev, iev_rde->ibuf.fd, iev_rde->events, 270 iev_rde->handler, iev_rde); 271 event_add(&iev_rde->ev, NULL); 272 273 if ((control_fd = control_init(ospfd_conf->csock)) == -1) 274 fatalx("control socket setup failed"); 275 main_imsg_compose_ospfe_fd(IMSG_CONTROLFD, 0, control_fd); 276 277 if (kr_init(!(ospfd_conf->flags & OSPFD_FLAG_NO_FIB_UPDATE), 278 ospfd_conf->rdomain) == -1) 279 fatalx("kr_init failed"); 280 281 event_dispatch(); 282 283 ospfd_shutdown(); 284 /* NOTREACHED */ 285 return (0); 286 } 287 288 __dead void 289 ospfd_shutdown(void) 290 { 291 pid_t pid; 292 int status; 293 294 /* close pipes */ 295 msgbuf_clear(&iev_ospfe->ibuf.w); 296 close(iev_ospfe->ibuf.fd); 297 msgbuf_clear(&iev_rde->ibuf.w); 298 close(iev_rde->ibuf.fd); 299 300 control_cleanup(ospfd_conf->csock); 301 kr_shutdown(); 302 carp_demote_shutdown(); 303 304 log_debug("waiting for children to terminate"); 305 do { 306 pid = wait(&status); 307 if (pid == -1) { 308 if (errno != EINTR && errno != ECHILD) 309 fatal("wait"); 310 } else if (WIFSIGNALED(status)) 311 log_warnx("%s terminated; signal %d", 312 (pid == rde_pid) ? "route decision engine" : 313 "ospf engine", WTERMSIG(status)); 314 } while (pid != -1 || (pid == -1 && errno == EINTR)); 315 316 free(iev_ospfe); 317 free(iev_rde); 318 free(ospfd_conf); 319 320 log_info("terminating"); 321 exit(0); 322 } 323 324 /* imsg handling */ 325 /* ARGSUSED */ 326 void 327 main_dispatch_ospfe(int fd, short event, void *bula) 328 { 329 struct imsgev *iev = bula; 330 struct imsgbuf *ibuf = &iev->ibuf; 331 struct imsg imsg; 332 struct demote_msg dmsg; 333 ssize_t n; 334 int shut = 0, verbose; 335 336 if (event & EV_READ) { 337 if ((n = imsg_read(ibuf)) == -1 && errno != EAGAIN) 338 fatal("imsg_read error"); 339 if (n == 0) /* connection closed */ 340 shut = 1; 341 } 342 if (event & EV_WRITE) { 343 if ((n = msgbuf_write(&ibuf->w)) == -1 && errno != EAGAIN) 344 fatal("msgbuf_write"); 345 if (n == 0) /* connection closed */ 346 shut = 1; 347 } 348 349 for (;;) { 350 if ((n = imsg_get(ibuf, &imsg)) == -1) 351 fatal("imsg_get"); 352 353 if (n == 0) 354 break; 355 356 switch (imsg.hdr.type) { 357 case IMSG_CTL_RELOAD: 358 if (ospf_reload() == -1) 359 log_warnx("configuration reload failed"); 360 else 361 log_debug("configuration reloaded"); 362 break; 363 case IMSG_CTL_FIB_COUPLE: 364 kr_fib_couple(); 365 break; 366 case IMSG_CTL_FIB_DECOUPLE: 367 kr_fib_decouple(); 368 break; 369 case IMSG_CTL_KROUTE: 370 case IMSG_CTL_KROUTE_ADDR: 371 kr_show_route(&imsg); 372 break; 373 case IMSG_DEMOTE: 374 if (imsg.hdr.len - IMSG_HEADER_SIZE != sizeof(dmsg)) 375 fatalx("invalid size of OE request"); 376 memcpy(&dmsg, imsg.data, sizeof(dmsg)); 377 carp_demote_set(dmsg.demote_group, dmsg.level); 378 break; 379 case IMSG_CTL_LOG_VERBOSE: 380 /* already checked by ospfe */ 381 memcpy(&verbose, imsg.data, sizeof(verbose)); 382 log_setverbose(verbose); 383 break; 384 default: 385 log_debug("main_dispatch_ospfe: error handling imsg %d", 386 imsg.hdr.type); 387 break; 388 } 389 imsg_free(&imsg); 390 } 391 if (!shut) 392 imsg_event_add(iev); 393 else { 394 /* this pipe is dead, so remove the event handler */ 395 event_del(&iev->ev); 396 event_loopexit(NULL); 397 } 398 } 399 400 /* ARGSUSED */ 401 void 402 main_dispatch_rde(int fd, short event, void *bula) 403 { 404 struct imsgev *iev = bula; 405 struct imsgbuf *ibuf = &iev->ibuf; 406 struct imsg imsg; 407 ssize_t n; 408 int count, shut = 0; 409 410 if (event & EV_READ) { 411 if ((n = imsg_read(ibuf)) == -1 && errno != EAGAIN) 412 fatal("imsg_read error"); 413 if (n == 0) /* connection closed */ 414 shut = 1; 415 } 416 if (event & EV_WRITE) { 417 if ((n = msgbuf_write(&ibuf->w)) == -1 && errno != EAGAIN) 418 fatal("msgbuf_write"); 419 if (n == 0) /* connection closed */ 420 shut = 1; 421 } 422 423 for (;;) { 424 if ((n = imsg_get(ibuf, &imsg)) == -1) 425 fatal("imsg_get"); 426 427 if (n == 0) 428 break; 429 430 switch (imsg.hdr.type) { 431 case IMSG_KROUTE_CHANGE: 432 count = (imsg.hdr.len - IMSG_HEADER_SIZE) / 433 sizeof(struct kroute); 434 if (kr_change(imsg.data, count)) 435 log_warn("main_dispatch_rde: error changing " 436 "route"); 437 break; 438 case IMSG_KROUTE_DELETE: 439 if (kr_delete(imsg.data)) 440 log_warn("main_dispatch_rde: error deleting " 441 "route"); 442 break; 443 default: 444 log_debug("main_dispatch_rde: error handling imsg %d", 445 imsg.hdr.type); 446 break; 447 } 448 imsg_free(&imsg); 449 } 450 if (!shut) 451 imsg_event_add(iev); 452 else { 453 /* this pipe is dead, so remove the event handler */ 454 event_del(&iev->ev); 455 event_loopexit(NULL); 456 } 457 } 458 459 void 460 main_imsg_compose_ospfe(int type, pid_t pid, void *data, u_int16_t datalen) 461 { 462 if (iev_ospfe == NULL) 463 return; 464 imsg_compose_event(iev_ospfe, type, 0, pid, -1, data, datalen); 465 } 466 467 void 468 main_imsg_compose_ospfe_fd(int type, pid_t pid, int fd) 469 { 470 if (iev_ospfe == NULL) 471 return; 472 imsg_compose_event(iev_ospfe, type, 0, pid, fd, NULL, 0); 473 } 474 475 void 476 main_imsg_compose_rde(int type, pid_t pid, void *data, u_int16_t datalen) 477 { 478 if (iev_rde == NULL) 479 return; 480 imsg_compose_event(iev_rde, type, 0, pid, -1, data, datalen); 481 } 482 483 void 484 imsg_event_add(struct imsgev *iev) 485 { 486 iev->events = EV_READ; 487 if (iev->ibuf.w.queued) 488 iev->events |= EV_WRITE; 489 490 event_del(&iev->ev); 491 event_set(&iev->ev, iev->ibuf.fd, iev->events, iev->handler, iev); 492 event_add(&iev->ev, NULL); 493 } 494 495 int 496 imsg_compose_event(struct imsgev *iev, u_int16_t type, u_int32_t peerid, 497 pid_t pid, int fd, void *data, u_int16_t datalen) 498 { 499 int ret; 500 501 if ((ret = imsg_compose(&iev->ibuf, type, peerid, 502 pid, fd, data, datalen)) != -1) 503 imsg_event_add(iev); 504 return (ret); 505 } 506 507 int 508 ospf_redistribute(struct kroute *kr, u_int32_t *metric) 509 { 510 struct redistribute *r; 511 struct in6_addr ina, inb; 512 struct iface *iface; 513 u_int8_t is_default = 0; 514 int depend_ok; 515 516 /* only allow ::/0 via REDIST_DEFAULT */ 517 if (IN6_IS_ADDR_UNSPECIFIED(&kr->prefix) && kr->prefixlen == 0) 518 is_default = 1; 519 520 SIMPLEQ_FOREACH(r, &ospfd_conf->redist_list, entry) { 521 if (r->dependon[0] != '\0') { 522 if ((iface = if_findname(r->dependon))) 523 depend_ok = ifstate_is_up(iface); 524 else 525 depend_ok = 0; 526 } else 527 depend_ok = 1; 528 529 switch (r->type & ~REDIST_NO) { 530 case REDIST_LABEL: 531 if (kr->rtlabel == r->label) { 532 *metric = depend_ok ? r->metric : MAX_METRIC; 533 return (r->type & REDIST_NO ? 0 : 1); 534 } 535 break; 536 case REDIST_STATIC: 537 /* 538 * Dynamic routes are not redistributable. Placed here 539 * so that link local addresses can be redistributed 540 * via a rtlabel. 541 */ 542 if (is_default) 543 continue; 544 if (kr->flags & F_DYNAMIC) 545 continue; 546 if (kr->flags & F_STATIC) { 547 *metric = depend_ok ? r->metric : MAX_METRIC; 548 return (r->type & REDIST_NO ? 0 : 1); 549 } 550 break; 551 case REDIST_CONNECTED: 552 if (is_default) 553 continue; 554 if (kr->flags & F_DYNAMIC) 555 continue; 556 if (kr->flags & F_CONNECTED) { 557 *metric = depend_ok ? r->metric : MAX_METRIC; 558 return (r->type & REDIST_NO ? 0 : 1); 559 } 560 break; 561 case REDIST_ADDR: 562 if (kr->flags & F_DYNAMIC) 563 continue; 564 565 if (IN6_IS_ADDR_UNSPECIFIED(&r->addr) && 566 r->prefixlen == 0) { 567 if (is_default) { 568 *metric = depend_ok ? r->metric : 569 MAX_METRIC; 570 return (r->type & REDIST_NO ? 0 : 1); 571 } else 572 return (0); 573 } 574 575 inet6applymask(&ina, &kr->prefix, r->prefixlen); 576 inet6applymask(&inb, &r->addr, r->prefixlen); 577 if (IN6_ARE_ADDR_EQUAL(&ina, &inb) && 578 kr->prefixlen >= r->prefixlen) { 579 *metric = depend_ok ? r->metric : MAX_METRIC; 580 return (r->type & REDIST_NO ? 0 : 1); 581 } 582 break; 583 case REDIST_DEFAULT: 584 if (is_default) { 585 *metric = depend_ok ? r->metric : MAX_METRIC; 586 return (r->type & REDIST_NO ? 0 : 1); 587 } 588 break; 589 } 590 } 591 592 return (0); 593 } 594 595 int 596 ospf_reload(void) 597 { 598 #ifdef notyet 599 struct area *area; 600 struct ospfd_conf *xconf; 601 602 if ((xconf = parse_config(conffile, ospfd_conf->opts)) == NULL) 603 return (-1); 604 605 /* send config to childs */ 606 if (ospf_sendboth(IMSG_RECONF_CONF, xconf, sizeof(*xconf)) == -1) 607 return (-1); 608 609 /* send areas, interfaces happen out of band */ 610 LIST_FOREACH(area, &xconf->area_list, entry) { 611 if (ospf_sendboth(IMSG_RECONF_AREA, area, sizeof(*area)) == -1) 612 return (-1); 613 } 614 615 if (ospf_sendboth(IMSG_RECONF_END, NULL, 0) == -1) 616 return (-1); 617 618 /* XXX send newly available interfaces to the childs */ 619 620 merge_config(ospfd_conf, xconf); 621 /* update redistribute lists */ 622 kr_reload(); 623 return (0); 624 #else 625 return (-1); 626 #endif 627 } 628 629 int 630 ospf_sendboth(enum imsg_type type, void *buf, u_int16_t len) 631 { 632 if (imsg_compose_event(iev_ospfe, type, 0, 0, -1, buf, len) == -1) 633 return (-1); 634 if (imsg_compose_event(iev_rde, type, 0, 0, -1, buf, len) == -1) 635 return (-1); 636 return (0); 637 } 638 639 void 640 merge_config(struct ospfd_conf *conf, struct ospfd_conf *xconf) 641 { 642 struct area *a, *xa, *na; 643 struct iface *iface; 644 struct redistribute *r; 645 646 /* change of rtr_id needs a restart */ 647 conf->flags = xconf->flags; 648 conf->spf_delay = xconf->spf_delay; 649 conf->spf_hold_time = xconf->spf_hold_time; 650 conf->redistribute = xconf->redistribute; 651 652 if (ospfd_process == PROC_MAIN) { 653 /* main process does neither use areas nor interfaces */ 654 while ((r = SIMPLEQ_FIRST(&conf->redist_list)) != NULL) { 655 SIMPLEQ_REMOVE_HEAD(&conf->redist_list, entry); 656 free(r); 657 } 658 while ((r = SIMPLEQ_FIRST(&xconf->redist_list)) != NULL) { 659 SIMPLEQ_REMOVE_HEAD(&xconf->redist_list, entry); 660 SIMPLEQ_INSERT_TAIL(&conf->redist_list, r, entry); 661 } 662 goto done; 663 } 664 665 /* merge areas and interfaces */ 666 for (a = LIST_FIRST(&conf->area_list); a != NULL; a = na) { 667 na = LIST_NEXT(a, entry); 668 /* find deleted areas */ 669 if ((xa = area_find(xconf, a->id)) == NULL) { 670 if (ospfd_process == PROC_OSPF_ENGINE) { 671 LIST_FOREACH(iface, &a->iface_list, entry) 672 if_fsm(iface, IF_EVT_DOWN); 673 } 674 LIST_REMOVE(a, entry); 675 area_del(a); 676 } 677 } 678 679 for (xa = LIST_FIRST(&xconf->area_list); xa != NULL; xa = na) { 680 na = LIST_NEXT(xa, entry); 681 if ((a = area_find(conf, xa->id)) == NULL) { 682 LIST_REMOVE(xa, entry); 683 LIST_INSERT_HEAD(&conf->area_list, xa, entry); 684 if (ospfd_process == PROC_OSPF_ENGINE) { 685 /* start interfaces */ 686 ospfe_demote_area(xa, 0); 687 LIST_FOREACH(iface, &xa->iface_list, entry) 688 if_start(conf, iface); 689 } 690 /* no need to merge interfaces */ 691 continue; 692 } 693 /* 694 * stub is not yet used but switching between stub and normal 695 * will be another painful job. 696 */ 697 a->stub = xa->stub; 698 a->stub_default_cost = xa->stub_default_cost; 699 if (ospfd_process == PROC_RDE_ENGINE) 700 a->dirty = 1; /* force SPF tree recalculation */ 701 702 /* merge interfaces */ 703 if (merge_interfaces(a, xa) && 704 ospfd_process == PROC_OSPF_ENGINE) 705 a->dirty = 1; /* force rtr LSA update */ 706 } 707 708 if (ospfd_process == PROC_OSPF_ENGINE) { 709 LIST_FOREACH(a, &conf->area_list, entry) { 710 LIST_FOREACH(iface, &a->iface_list, entry) { 711 if (iface->state == IF_STA_NEW) { 712 iface->state = IF_STA_DOWN; 713 if_start(conf, iface); 714 } 715 } 716 if (a->dirty) { 717 a->dirty = 0; 718 orig_rtr_lsa(LIST_FIRST(&a->iface_list)); 719 } 720 } 721 } 722 723 done: 724 while ((a = LIST_FIRST(&xconf->area_list)) != NULL) { 725 LIST_REMOVE(a, entry); 726 area_del(a); 727 } 728 free(xconf); 729 } 730 731 int 732 merge_interfaces(struct area *a, struct area *xa) 733 { 734 struct iface *i, *xi, *ni; 735 int dirty = 0; 736 737 /* problems: 738 * - new interfaces (easy) 739 * - deleted interfaces (needs to be done via fsm?) 740 * - changing passive (painful?) 741 */ 742 for (i = LIST_FIRST(&a->iface_list); i != NULL; i = ni) { 743 ni = LIST_NEXT(i, entry); 744 if (iface_lookup(xa, i) == NULL) { 745 log_debug("merge_interfaces: proc %d area %s removing " 746 "interface %s", ospfd_process, inet_ntoa(a->id), 747 i->name); 748 if (ospfd_process == PROC_OSPF_ENGINE) 749 if_fsm(i, IF_EVT_DOWN); 750 LIST_REMOVE(i, entry); 751 if_del(i); 752 } 753 } 754 755 for (xi = LIST_FIRST(&xa->iface_list); xi != NULL; xi = ni) { 756 ni = LIST_NEXT(xi, entry); 757 if ((i = iface_lookup(a, xi)) == NULL) { 758 /* new interface but delay initialisation */ 759 log_debug("merge_interfaces: proc %d area %s adding " 760 "interface %s", ospfd_process, inet_ntoa(a->id), 761 xi->name); 762 LIST_REMOVE(xi, entry); 763 LIST_INSERT_HEAD(&a->iface_list, xi, entry); 764 if (ospfd_process == PROC_OSPF_ENGINE) 765 xi->state = IF_STA_NEW; 766 continue; 767 } 768 log_debug("merge_interfaces: proc %d area %s merging " 769 "interface %s", ospfd_process, inet_ntoa(a->id), i->name); 770 i->addr = xi->addr; 771 i->dst = xi->dst; 772 i->abr_id = xi->abr_id; 773 i->baudrate = xi->baudrate; 774 i->dead_interval = xi->dead_interval; 775 i->mtu = xi->mtu; 776 i->transmit_delay = xi->transmit_delay; 777 i->hello_interval = xi->hello_interval; 778 i->rxmt_interval = xi->rxmt_interval; 779 if (i->metric != xi->metric) 780 dirty = 1; 781 i->metric = xi->metric; 782 i->priority = xi->priority; 783 i->flags = xi->flags; /* needed? */ 784 i->type = xi->type; /* needed? */ 785 i->if_type = xi->if_type; /* needed? */ 786 i->linkstate = xi->linkstate; /* needed? */ 787 788 #if 0 /* XXX needs some kind of love */ 789 if (i->passive != xi->passive) { 790 /* need to restart interface to cope with this change */ 791 if (ospfd_process == PROC_OSPF_ENGINE) 792 if_fsm(i, IF_EVT_DOWN); 793 i->passive = xi->passive; 794 if (ospfd_process == PROC_OSPF_ENGINE) 795 if_fsm(i, IF_EVT_UP); 796 } 797 #endif 798 } 799 return (dirty); 800 } 801 802 struct iface * 803 iface_lookup(struct area *area, struct iface *iface) 804 { 805 struct iface *i; 806 807 LIST_FOREACH(i, &area->iface_list, entry) 808 if (i->ifindex == iface->ifindex) 809 return (i); 810 return (NULL); 811 } 812 813 int 814 ifstate_is_up(struct iface *iface) 815 { 816 if (!(iface->flags & IFF_UP)) 817 return (0); 818 if (iface->if_type == IFT_CARP && 819 iface->linkstate == LINK_STATE_UNKNOWN) 820 return (0); 821 return LINK_STATE_IS_UP(iface->linkstate); 822 } 823