1 /* $OpenBSD: ospf6d.c,v 1.53 2023/03/08 04:43:14 guenther 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 enum ospfd_process ospfd_process; 68 struct ospfd_conf *ospfd_conf = NULL; 69 static struct imsgev *iev_ospfe; 70 static struct imsgev *iev_rde; 71 char *conffile; 72 73 pid_t ospfe_pid = 0; 74 pid_t rde_pid = 0; 75 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 /* no filesystem visibility */ 278 if (unveil("/", "") == -1) 279 fatal("unveil /"); 280 if (unveil(NULL, NULL) == -1) 281 fatal("unveil"); 282 283 if (kr_init(!(ospfd_conf->flags & OSPFD_FLAG_NO_FIB_UPDATE), 284 ospfd_conf->rdomain, ospfd_conf->redist_label_or_prefix, 285 ospfd_conf->fib_priority) == -1) 286 fatalx("kr_init failed"); 287 288 event_dispatch(); 289 290 ospfd_shutdown(); 291 /* NOTREACHED */ 292 return (0); 293 } 294 295 __dead void 296 ospfd_shutdown(void) 297 { 298 pid_t pid; 299 int status; 300 301 /* close pipes */ 302 msgbuf_clear(&iev_ospfe->ibuf.w); 303 close(iev_ospfe->ibuf.fd); 304 msgbuf_clear(&iev_rde->ibuf.w); 305 close(iev_rde->ibuf.fd); 306 307 control_cleanup(); 308 kr_shutdown(); 309 carp_demote_shutdown(); 310 311 log_debug("waiting for children to terminate"); 312 do { 313 pid = wait(&status); 314 if (pid == -1) { 315 if (errno != EINTR && errno != ECHILD) 316 fatal("wait"); 317 } else if (WIFSIGNALED(status)) 318 log_warnx("%s terminated; signal %d", 319 (pid == rde_pid) ? "route decision engine" : 320 "ospf engine", WTERMSIG(status)); 321 } while (pid != -1 || (pid == -1 && errno == EINTR)); 322 323 free(iev_ospfe); 324 free(iev_rde); 325 free(ospfd_conf); 326 327 log_info("terminating"); 328 exit(0); 329 } 330 331 /* imsg handling */ 332 void 333 main_dispatch_ospfe(int fd, short event, void *bula) 334 { 335 struct imsgev *iev = bula; 336 struct imsgbuf *ibuf = &iev->ibuf; 337 struct imsg imsg; 338 struct demote_msg dmsg; 339 ssize_t n; 340 int shut = 0, verbose; 341 342 if (event & EV_READ) { 343 if ((n = imsg_read(ibuf)) == -1 && errno != EAGAIN) 344 fatal("imsg_read error"); 345 if (n == 0) /* connection closed */ 346 shut = 1; 347 } 348 if (event & EV_WRITE) { 349 if ((n = msgbuf_write(&ibuf->w)) == -1 && errno != EAGAIN) 350 fatal("msgbuf_write"); 351 if (n == 0) /* connection closed */ 352 shut = 1; 353 } 354 355 for (;;) { 356 if ((n = imsg_get(ibuf, &imsg)) == -1) 357 fatal("imsg_get"); 358 359 if (n == 0) 360 break; 361 362 switch (imsg.hdr.type) { 363 case IMSG_CTL_RELOAD: 364 if (ospf_reload() == -1) 365 log_warnx("configuration reload failed"); 366 else 367 log_debug("configuration reloaded"); 368 break; 369 case IMSG_CTL_FIB_COUPLE: 370 kr_fib_couple(); 371 break; 372 case IMSG_CTL_FIB_DECOUPLE: 373 kr_fib_decouple(); 374 break; 375 case IMSG_CTL_KROUTE: 376 case IMSG_CTL_KROUTE_ADDR: 377 kr_show_route(&imsg); 378 break; 379 case IMSG_DEMOTE: 380 if (imsg.hdr.len - IMSG_HEADER_SIZE != sizeof(dmsg)) 381 fatalx("invalid size of OE request"); 382 memcpy(&dmsg, imsg.data, sizeof(dmsg)); 383 carp_demote_set(dmsg.demote_group, dmsg.level); 384 break; 385 case IMSG_CTL_LOG_VERBOSE: 386 /* already checked by ospfe */ 387 memcpy(&verbose, imsg.data, sizeof(verbose)); 388 log_setverbose(verbose); 389 break; 390 default: 391 log_debug("main_dispatch_ospfe: error handling imsg %d", 392 imsg.hdr.type); 393 break; 394 } 395 imsg_free(&imsg); 396 } 397 if (!shut) 398 imsg_event_add(iev); 399 else { 400 /* this pipe is dead, so remove the event handler */ 401 event_del(&iev->ev); 402 event_loopexit(NULL); 403 } 404 } 405 406 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(ospfd_conf->redist_label_or_prefix); 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 int rchange = 0; 658 659 /* change of rtr_id needs a restart */ 660 conf->flags = xconf->flags; 661 conf->spf_delay = xconf->spf_delay; 662 conf->spf_hold_time = xconf->spf_hold_time; 663 if (SIMPLEQ_EMPTY(&conf->redist_list) != 664 SIMPLEQ_EMPTY(&xconf->redist_list)) 665 rchange = 1; 666 conf->redist_label_or_prefix = xconf->redist_label_or_prefix; 667 668 if (ospfd_process == PROC_MAIN) { 669 /* main process does neither use areas nor interfaces */ 670 while ((r = SIMPLEQ_FIRST(&conf->redist_list)) != NULL) { 671 SIMPLEQ_REMOVE_HEAD(&conf->redist_list, entry); 672 free(r); 673 } 674 SIMPLEQ_CONCAT(&conf->redist_list, &xconf->redist_list); 675 676 /* adjust FIB priority if changed */ 677 if (conf->fib_priority != xconf->fib_priority) { 678 kr_fib_decouple(); 679 kr_fib_update_prio(xconf->fib_priority); 680 conf->fib_priority = xconf->fib_priority; 681 kr_fib_couple(); 682 } 683 684 goto done; 685 } 686 687 /* merge areas and interfaces */ 688 for (a = LIST_FIRST(&conf->area_list); a != NULL; a = na) { 689 na = LIST_NEXT(a, entry); 690 /* find deleted areas */ 691 if ((xa = area_find(xconf, a->id)) == NULL) { 692 if (ospfd_process == PROC_OSPF_ENGINE) { 693 LIST_FOREACH(iface, &a->iface_list, entry) 694 if_fsm(iface, IF_EVT_DOWN); 695 } 696 LIST_REMOVE(a, entry); 697 area_del(a); 698 } 699 } 700 701 for (xa = LIST_FIRST(&xconf->area_list); xa != NULL; xa = na) { 702 na = LIST_NEXT(xa, entry); 703 if ((a = area_find(conf, xa->id)) == NULL) { 704 LIST_REMOVE(xa, entry); 705 LIST_INSERT_HEAD(&conf->area_list, xa, entry); 706 if (ospfd_process == PROC_OSPF_ENGINE) { 707 /* start interfaces */ 708 ospfe_demote_area(xa, 0); 709 LIST_FOREACH(iface, &xa->iface_list, entry) 710 if_start(conf, iface); 711 } 712 /* no need to merge interfaces */ 713 continue; 714 } 715 /* 716 * stub is not yet used but switching between stub and normal 717 * will be another painful job. 718 */ 719 a->stub = xa->stub; 720 a->stub_default_cost = xa->stub_default_cost; 721 if (ospfd_process == PROC_RDE_ENGINE) 722 a->dirty = 1; /* force SPF tree recalculation */ 723 724 /* merge interfaces */ 725 if (merge_interfaces(a, xa) && 726 ospfd_process == PROC_OSPF_ENGINE) 727 a->dirty = 1; /* force rtr LSA update */ 728 } 729 730 if (ospfd_process == PROC_OSPF_ENGINE) { 731 LIST_FOREACH(a, &conf->area_list, entry) { 732 LIST_FOREACH(iface, &a->iface_list, entry) { 733 if (iface->state == IF_STA_NEW) { 734 iface->state = IF_STA_DOWN; 735 if_start(conf, iface); 736 } 737 } 738 if (a->dirty || rchange) { 739 a->dirty = 0; 740 orig_rtr_lsa(LIST_FIRST(&a->iface_list)->area); 741 } 742 } 743 } 744 745 done: 746 while ((a = LIST_FIRST(&xconf->area_list)) != NULL) { 747 LIST_REMOVE(a, entry); 748 area_del(a); 749 } 750 free(xconf); 751 } 752 753 int 754 merge_interfaces(struct area *a, struct area *xa) 755 { 756 struct iface *i, *xi, *ni; 757 int dirty = 0; 758 759 /* problems: 760 * - new interfaces (easy) 761 * - deleted interfaces (needs to be done via fsm?) 762 * - changing passive (painful?) 763 */ 764 for (i = LIST_FIRST(&a->iface_list); i != NULL; i = ni) { 765 ni = LIST_NEXT(i, entry); 766 if (iface_lookup(xa, i) == NULL) { 767 log_debug("merge_interfaces: proc %d area %s removing " 768 "interface %s", ospfd_process, inet_ntoa(a->id), 769 i->name); 770 if (ospfd_process == PROC_OSPF_ENGINE) 771 if_fsm(i, IF_EVT_DOWN); 772 LIST_REMOVE(i, entry); 773 if_del(i); 774 } 775 } 776 777 for (xi = LIST_FIRST(&xa->iface_list); xi != NULL; xi = ni) { 778 ni = LIST_NEXT(xi, entry); 779 if ((i = iface_lookup(a, xi)) == NULL) { 780 /* new interface but delay initialisation */ 781 log_debug("merge_interfaces: proc %d area %s adding " 782 "interface %s", ospfd_process, inet_ntoa(a->id), 783 xi->name); 784 LIST_REMOVE(xi, entry); 785 LIST_INSERT_HEAD(&a->iface_list, xi, entry); 786 if (ospfd_process == PROC_OSPF_ENGINE) 787 xi->state = IF_STA_NEW; 788 continue; 789 } 790 log_debug("merge_interfaces: proc %d area %s merging " 791 "interface %s", ospfd_process, inet_ntoa(a->id), i->name); 792 i->addr = xi->addr; 793 i->dst = xi->dst; 794 i->abr_id = xi->abr_id; 795 i->baudrate = xi->baudrate; 796 i->dead_interval = xi->dead_interval; 797 i->mtu = xi->mtu; 798 i->transmit_delay = xi->transmit_delay; 799 i->hello_interval = xi->hello_interval; 800 i->rxmt_interval = xi->rxmt_interval; 801 if (i->metric != xi->metric) 802 dirty = 1; 803 i->metric = xi->metric; 804 i->priority = xi->priority; 805 if (i->self) 806 i->self->priority = i->priority; 807 i->flags = xi->flags; /* needed? */ 808 i->type = xi->type; /* needed? */ 809 i->if_type = xi->if_type; /* needed? */ 810 i->linkstate = xi->linkstate; /* needed? */ 811 812 #if 0 /* XXX needs some kind of love */ 813 if (i->passive != xi->passive) { 814 /* need to restart interface to cope with this change */ 815 if (ospfd_process == PROC_OSPF_ENGINE) 816 if_fsm(i, IF_EVT_DOWN); 817 i->passive = xi->passive; 818 if (ospfd_process == PROC_OSPF_ENGINE) 819 if_fsm(i, IF_EVT_UP); 820 } 821 #endif 822 } 823 return (dirty); 824 } 825 826 struct iface * 827 iface_lookup(struct area *area, struct iface *iface) 828 { 829 struct iface *i; 830 831 LIST_FOREACH(i, &area->iface_list, entry) 832 if (i->ifindex == iface->ifindex) 833 return (i); 834 return (NULL); 835 } 836 837 int 838 ifstate_is_up(struct iface *iface) 839 { 840 if (!(iface->flags & IFF_UP)) 841 return (0); 842 if (iface->if_type == IFT_CARP && 843 iface->linkstate == LINK_STATE_UNKNOWN) 844 return (0); 845 return LINK_STATE_IS_UP(iface->linkstate); 846 } 847