1 /* $OpenBSD: ospf6d.c,v 1.44 2019/03/25 20:53:33 jca 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("ospf6d already running"); 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 (unveil(ospfd_conf->csock, "c") == -1) 278 fatal("unveil"); 279 if (unveil(NULL, NULL) == -1) 280 fatal("unveil"); 281 282 if (kr_init(!(ospfd_conf->flags & OSPFD_FLAG_NO_FIB_UPDATE), 283 ospfd_conf->rdomain, ospfd_conf->fib_priority) == -1) 284 fatalx("kr_init failed"); 285 286 event_dispatch(); 287 288 ospfd_shutdown(); 289 /* NOTREACHED */ 290 return (0); 291 } 292 293 __dead void 294 ospfd_shutdown(void) 295 { 296 pid_t pid; 297 int status; 298 299 /* close pipes */ 300 msgbuf_clear(&iev_ospfe->ibuf.w); 301 close(iev_ospfe->ibuf.fd); 302 msgbuf_clear(&iev_rde->ibuf.w); 303 close(iev_rde->ibuf.fd); 304 305 control_cleanup(ospfd_conf->csock); 306 kr_shutdown(); 307 carp_demote_shutdown(); 308 309 log_debug("waiting for children to terminate"); 310 do { 311 pid = wait(&status); 312 if (pid == -1) { 313 if (errno != EINTR && errno != ECHILD) 314 fatal("wait"); 315 } else if (WIFSIGNALED(status)) 316 log_warnx("%s terminated; signal %d", 317 (pid == rde_pid) ? "route decision engine" : 318 "ospf engine", WTERMSIG(status)); 319 } while (pid != -1 || (pid == -1 && errno == EINTR)); 320 321 free(iev_ospfe); 322 free(iev_rde); 323 free(ospfd_conf); 324 325 log_info("terminating"); 326 exit(0); 327 } 328 329 /* imsg handling */ 330 /* ARGSUSED */ 331 void 332 main_dispatch_ospfe(int fd, short event, void *bula) 333 { 334 struct imsgev *iev = bula; 335 struct imsgbuf *ibuf = &iev->ibuf; 336 struct imsg imsg; 337 struct demote_msg dmsg; 338 ssize_t n; 339 int shut = 0, verbose; 340 341 if (event & EV_READ) { 342 if ((n = imsg_read(ibuf)) == -1 && errno != EAGAIN) 343 fatal("imsg_read error"); 344 if (n == 0) /* connection closed */ 345 shut = 1; 346 } 347 if (event & EV_WRITE) { 348 if ((n = msgbuf_write(&ibuf->w)) == -1 && errno != EAGAIN) 349 fatal("msgbuf_write"); 350 if (n == 0) /* connection closed */ 351 shut = 1; 352 } 353 354 for (;;) { 355 if ((n = imsg_get(ibuf, &imsg)) == -1) 356 fatal("imsg_get"); 357 358 if (n == 0) 359 break; 360 361 switch (imsg.hdr.type) { 362 case IMSG_CTL_RELOAD: 363 if (ospf_reload() == -1) 364 log_warnx("configuration reload failed"); 365 else 366 log_debug("configuration reloaded"); 367 break; 368 case IMSG_CTL_FIB_COUPLE: 369 kr_fib_couple(); 370 break; 371 case IMSG_CTL_FIB_DECOUPLE: 372 kr_fib_decouple(); 373 break; 374 case IMSG_CTL_KROUTE: 375 case IMSG_CTL_KROUTE_ADDR: 376 kr_show_route(&imsg); 377 break; 378 case IMSG_DEMOTE: 379 if (imsg.hdr.len - IMSG_HEADER_SIZE != sizeof(dmsg)) 380 fatalx("invalid size of OE request"); 381 memcpy(&dmsg, imsg.data, sizeof(dmsg)); 382 carp_demote_set(dmsg.demote_group, dmsg.level); 383 break; 384 case IMSG_CTL_LOG_VERBOSE: 385 /* already checked by ospfe */ 386 memcpy(&verbose, imsg.data, sizeof(verbose)); 387 log_setverbose(verbose); 388 break; 389 default: 390 log_debug("main_dispatch_ospfe: error handling imsg %d", 391 imsg.hdr.type); 392 break; 393 } 394 imsg_free(&imsg); 395 } 396 if (!shut) 397 imsg_event_add(iev); 398 else { 399 /* this pipe is dead, so remove the event handler */ 400 event_del(&iev->ev); 401 event_loopexit(NULL); 402 } 403 } 404 405 /* ARGSUSED */ 406 void 407 main_dispatch_rde(int fd, short event, void *bula) 408 { 409 struct imsgev *iev = bula; 410 struct imsgbuf *ibuf = &iev->ibuf; 411 struct imsg imsg; 412 ssize_t n; 413 int count, shut = 0; 414 415 if (event & EV_READ) { 416 if ((n = imsg_read(ibuf)) == -1 && errno != EAGAIN) 417 fatal("imsg_read error"); 418 if (n == 0) /* connection closed */ 419 shut = 1; 420 } 421 if (event & EV_WRITE) { 422 if ((n = msgbuf_write(&ibuf->w)) == -1 && errno != EAGAIN) 423 fatal("msgbuf_write"); 424 if (n == 0) /* connection closed */ 425 shut = 1; 426 } 427 428 for (;;) { 429 if ((n = imsg_get(ibuf, &imsg)) == -1) 430 fatal("imsg_get"); 431 432 if (n == 0) 433 break; 434 435 switch (imsg.hdr.type) { 436 case IMSG_KROUTE_CHANGE: 437 count = (imsg.hdr.len - IMSG_HEADER_SIZE) / 438 sizeof(struct kroute); 439 if (kr_change(imsg.data, count)) 440 log_warn("main_dispatch_rde: error changing " 441 "route"); 442 break; 443 case IMSG_KROUTE_DELETE: 444 if (kr_delete(imsg.data)) 445 log_warn("main_dispatch_rde: error deleting " 446 "route"); 447 break; 448 default: 449 log_debug("main_dispatch_rde: error handling imsg %d", 450 imsg.hdr.type); 451 break; 452 } 453 imsg_free(&imsg); 454 } 455 if (!shut) 456 imsg_event_add(iev); 457 else { 458 /* this pipe is dead, so remove the event handler */ 459 event_del(&iev->ev); 460 event_loopexit(NULL); 461 } 462 } 463 464 void 465 main_imsg_compose_ospfe(int type, pid_t pid, void *data, u_int16_t datalen) 466 { 467 if (iev_ospfe == NULL) 468 return; 469 imsg_compose_event(iev_ospfe, type, 0, pid, -1, data, datalen); 470 } 471 472 void 473 main_imsg_compose_ospfe_fd(int type, pid_t pid, int fd) 474 { 475 if (iev_ospfe == NULL) 476 return; 477 imsg_compose_event(iev_ospfe, type, 0, pid, fd, NULL, 0); 478 } 479 480 void 481 main_imsg_compose_rde(int type, pid_t pid, void *data, u_int16_t datalen) 482 { 483 if (iev_rde == NULL) 484 return; 485 imsg_compose_event(iev_rde, type, 0, pid, -1, data, datalen); 486 } 487 488 void 489 imsg_event_add(struct imsgev *iev) 490 { 491 iev->events = EV_READ; 492 if (iev->ibuf.w.queued) 493 iev->events |= EV_WRITE; 494 495 event_del(&iev->ev); 496 event_set(&iev->ev, iev->ibuf.fd, iev->events, iev->handler, iev); 497 event_add(&iev->ev, NULL); 498 } 499 500 int 501 imsg_compose_event(struct imsgev *iev, u_int16_t type, u_int32_t peerid, 502 pid_t pid, int fd, void *data, u_int16_t datalen) 503 { 504 int ret; 505 506 if ((ret = imsg_compose(&iev->ibuf, type, peerid, 507 pid, fd, data, datalen)) != -1) 508 imsg_event_add(iev); 509 return (ret); 510 } 511 512 int 513 ospf_redistribute(struct kroute *kr, u_int32_t *metric) 514 { 515 struct redistribute *r; 516 struct in6_addr ina, inb; 517 struct iface *iface; 518 u_int8_t is_default = 0; 519 int depend_ok; 520 521 /* only allow ::/0 via REDIST_DEFAULT */ 522 if (IN6_IS_ADDR_UNSPECIFIED(&kr->prefix) && kr->prefixlen == 0) 523 is_default = 1; 524 525 SIMPLEQ_FOREACH(r, &ospfd_conf->redist_list, entry) { 526 if (r->dependon[0] != '\0') { 527 if ((iface = if_findname(r->dependon))) 528 depend_ok = ifstate_is_up(iface); 529 else 530 depend_ok = 0; 531 } else 532 depend_ok = 1; 533 534 switch (r->type & ~REDIST_NO) { 535 case REDIST_LABEL: 536 if (kr->rtlabel == r->label) { 537 *metric = depend_ok ? r->metric : 538 r->metric | MAX_METRIC; 539 return (r->type & REDIST_NO ? 0 : 1); 540 } 541 break; 542 case REDIST_STATIC: 543 /* 544 * Dynamic routes are not redistributable. Placed here 545 * so that link local addresses can be redistributed 546 * via a rtlabel. 547 */ 548 if (is_default) 549 continue; 550 if (kr->flags & F_DYNAMIC) 551 continue; 552 if (kr->flags & F_STATIC) { 553 *metric = depend_ok ? r->metric : 554 r->metric | MAX_METRIC; 555 return (r->type & REDIST_NO ? 0 : 1); 556 } 557 break; 558 case REDIST_CONNECTED: 559 if (is_default) 560 continue; 561 if (kr->flags & F_DYNAMIC) 562 continue; 563 if (kr->flags & F_CONNECTED) { 564 *metric = depend_ok ? r->metric : 565 r->metric | MAX_METRIC; 566 return (r->type & REDIST_NO ? 0 : 1); 567 } 568 break; 569 case REDIST_ADDR: 570 if (kr->flags & F_DYNAMIC) 571 continue; 572 573 if (IN6_IS_ADDR_UNSPECIFIED(&r->addr) && 574 r->prefixlen == 0) { 575 if (is_default) { 576 *metric = depend_ok ? r->metric : 577 r->metric | MAX_METRIC; 578 return (r->type & REDIST_NO ? 0 : 1); 579 } else 580 return (0); 581 } 582 583 inet6applymask(&ina, &kr->prefix, r->prefixlen); 584 inet6applymask(&inb, &r->addr, r->prefixlen); 585 if (IN6_ARE_ADDR_EQUAL(&ina, &inb) && 586 kr->prefixlen >= r->prefixlen) { 587 *metric = depend_ok ? r->metric : 588 r->metric | MAX_METRIC; 589 return (r->type & REDIST_NO ? 0 : 1); 590 } 591 break; 592 case REDIST_DEFAULT: 593 if (is_default) { 594 *metric = depend_ok ? r->metric : 595 r->metric | MAX_METRIC; 596 return (r->type & REDIST_NO ? 0 : 1); 597 } 598 break; 599 } 600 } 601 602 return (0); 603 } 604 605 int 606 ospf_reload(void) 607 { 608 #ifdef notyet 609 struct area *area; 610 struct ospfd_conf *xconf; 611 612 if ((xconf = parse_config(conffile, ospfd_conf->opts)) == NULL) 613 return (-1); 614 615 /* XXX bail out if router-id changed */ 616 617 /* send config to childs */ 618 if (ospf_sendboth(IMSG_RECONF_CONF, xconf, sizeof(*xconf)) == -1) 619 return (-1); 620 621 /* send areas, interfaces happen out of band */ 622 LIST_FOREACH(area, &xconf->area_list, entry) { 623 if (ospf_sendboth(IMSG_RECONF_AREA, area, sizeof(*area)) == -1) 624 return (-1); 625 } 626 627 if (ospf_sendboth(IMSG_RECONF_END, NULL, 0) == -1) 628 return (-1); 629 630 /* XXX send newly available interfaces to the childs */ 631 632 merge_config(ospfd_conf, xconf); 633 /* update redistribute lists */ 634 kr_reload(); 635 return (0); 636 #else 637 return (-1); 638 #endif 639 } 640 641 int 642 ospf_sendboth(enum imsg_type type, void *buf, u_int16_t len) 643 { 644 if (imsg_compose_event(iev_ospfe, type, 0, 0, -1, buf, len) == -1) 645 return (-1); 646 if (imsg_compose_event(iev_rde, type, 0, 0, -1, buf, len) == -1) 647 return (-1); 648 return (0); 649 } 650 651 void 652 merge_config(struct ospfd_conf *conf, struct ospfd_conf *xconf) 653 { 654 struct area *a, *xa, *na; 655 struct iface *iface; 656 struct redistribute *r; 657 658 /* change of rtr_id needs a restart */ 659 conf->flags = xconf->flags; 660 conf->spf_delay = xconf->spf_delay; 661 conf->spf_hold_time = xconf->spf_hold_time; 662 conf->redistribute = xconf->redistribute; 663 664 if (ospfd_process == PROC_MAIN) { 665 /* main process does neither use areas nor interfaces */ 666 while ((r = SIMPLEQ_FIRST(&conf->redist_list)) != NULL) { 667 SIMPLEQ_REMOVE_HEAD(&conf->redist_list, entry); 668 free(r); 669 } 670 while ((r = SIMPLEQ_FIRST(&xconf->redist_list)) != NULL) { 671 SIMPLEQ_REMOVE_HEAD(&xconf->redist_list, entry); 672 SIMPLEQ_INSERT_TAIL(&conf->redist_list, r, entry); 673 } 674 goto done; 675 } 676 677 /* merge areas and interfaces */ 678 for (a = LIST_FIRST(&conf->area_list); a != NULL; a = na) { 679 na = LIST_NEXT(a, entry); 680 /* find deleted areas */ 681 if ((xa = area_find(xconf, a->id)) == NULL) { 682 if (ospfd_process == PROC_OSPF_ENGINE) { 683 LIST_FOREACH(iface, &a->iface_list, entry) 684 if_fsm(iface, IF_EVT_DOWN); 685 } 686 LIST_REMOVE(a, entry); 687 area_del(a); 688 } 689 } 690 691 for (xa = LIST_FIRST(&xconf->area_list); xa != NULL; xa = na) { 692 na = LIST_NEXT(xa, entry); 693 if ((a = area_find(conf, xa->id)) == NULL) { 694 LIST_REMOVE(xa, entry); 695 LIST_INSERT_HEAD(&conf->area_list, xa, entry); 696 if (ospfd_process == PROC_OSPF_ENGINE) { 697 /* start interfaces */ 698 ospfe_demote_area(xa, 0); 699 LIST_FOREACH(iface, &xa->iface_list, entry) 700 if_start(conf, iface); 701 } 702 /* no need to merge interfaces */ 703 continue; 704 } 705 /* 706 * stub is not yet used but switching between stub and normal 707 * will be another painful job. 708 */ 709 a->stub = xa->stub; 710 a->stub_default_cost = xa->stub_default_cost; 711 if (ospfd_process == PROC_RDE_ENGINE) 712 a->dirty = 1; /* force SPF tree recalculation */ 713 714 /* merge interfaces */ 715 if (merge_interfaces(a, xa) && 716 ospfd_process == PROC_OSPF_ENGINE) 717 a->dirty = 1; /* force rtr LSA update */ 718 } 719 720 if (ospfd_process == PROC_OSPF_ENGINE) { 721 LIST_FOREACH(a, &conf->area_list, entry) { 722 LIST_FOREACH(iface, &a->iface_list, entry) { 723 if (iface->state == IF_STA_NEW) { 724 iface->state = IF_STA_DOWN; 725 if_start(conf, iface); 726 } 727 } 728 if (a->dirty) { 729 a->dirty = 0; 730 orig_rtr_lsa(LIST_FIRST(&a->iface_list)); 731 } 732 } 733 } 734 735 done: 736 while ((a = LIST_FIRST(&xconf->area_list)) != NULL) { 737 LIST_REMOVE(a, entry); 738 area_del(a); 739 } 740 free(xconf); 741 } 742 743 int 744 merge_interfaces(struct area *a, struct area *xa) 745 { 746 struct iface *i, *xi, *ni; 747 int dirty = 0; 748 749 /* problems: 750 * - new interfaces (easy) 751 * - deleted interfaces (needs to be done via fsm?) 752 * - changing passive (painful?) 753 */ 754 for (i = LIST_FIRST(&a->iface_list); i != NULL; i = ni) { 755 ni = LIST_NEXT(i, entry); 756 if (iface_lookup(xa, i) == NULL) { 757 log_debug("merge_interfaces: proc %d area %s removing " 758 "interface %s", ospfd_process, inet_ntoa(a->id), 759 i->name); 760 if (ospfd_process == PROC_OSPF_ENGINE) 761 if_fsm(i, IF_EVT_DOWN); 762 LIST_REMOVE(i, entry); 763 if_del(i); 764 } 765 } 766 767 for (xi = LIST_FIRST(&xa->iface_list); xi != NULL; xi = ni) { 768 ni = LIST_NEXT(xi, entry); 769 if ((i = iface_lookup(a, xi)) == NULL) { 770 /* new interface but delay initialisation */ 771 log_debug("merge_interfaces: proc %d area %s adding " 772 "interface %s", ospfd_process, inet_ntoa(a->id), 773 xi->name); 774 LIST_REMOVE(xi, entry); 775 LIST_INSERT_HEAD(&a->iface_list, xi, entry); 776 if (ospfd_process == PROC_OSPF_ENGINE) 777 xi->state = IF_STA_NEW; 778 continue; 779 } 780 log_debug("merge_interfaces: proc %d area %s merging " 781 "interface %s", ospfd_process, inet_ntoa(a->id), i->name); 782 i->addr = xi->addr; 783 i->dst = xi->dst; 784 i->abr_id = xi->abr_id; 785 i->baudrate = xi->baudrate; 786 i->dead_interval = xi->dead_interval; 787 i->mtu = xi->mtu; 788 i->transmit_delay = xi->transmit_delay; 789 i->hello_interval = xi->hello_interval; 790 i->rxmt_interval = xi->rxmt_interval; 791 if (i->metric != xi->metric) 792 dirty = 1; 793 i->metric = xi->metric; 794 i->priority = xi->priority; 795 i->flags = xi->flags; /* needed? */ 796 i->type = xi->type; /* needed? */ 797 i->if_type = xi->if_type; /* needed? */ 798 i->linkstate = xi->linkstate; /* needed? */ 799 800 #if 0 /* XXX needs some kind of love */ 801 if (i->passive != xi->passive) { 802 /* need to restart interface to cope with this change */ 803 if (ospfd_process == PROC_OSPF_ENGINE) 804 if_fsm(i, IF_EVT_DOWN); 805 i->passive = xi->passive; 806 if (ospfd_process == PROC_OSPF_ENGINE) 807 if_fsm(i, IF_EVT_UP); 808 } 809 #endif 810 } 811 return (dirty); 812 } 813 814 struct iface * 815 iface_lookup(struct area *area, struct iface *iface) 816 { 817 struct iface *i; 818 819 LIST_FOREACH(i, &area->iface_list, entry) 820 if (i->ifindex == iface->ifindex) 821 return (i); 822 return (NULL); 823 } 824 825 int 826 ifstate_is_up(struct iface *iface) 827 { 828 if (!(iface->flags & IFF_UP)) 829 return (0); 830 if (iface->if_type == IFT_CARP && 831 iface->linkstate == LINK_STATE_UNKNOWN) 832 return (0); 833 return LINK_STATE_IS_UP(iface->linkstate); 834 } 835