1 /* $OpenBSD: ospfd.c,v 1.117 2023/03/08 04:43:14 guenther Exp $ */ 2 3 /* 4 * Copyright (c) 2005 Claudio Jeker <claudio@openbsd.org> 5 * Copyright (c) 2004 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 "ospfd.h" 45 #include "ospf.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 [-cdnv] [-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 struct area *a; 113 int ch, opts = 0; 114 int debug = 0; 115 int ipforwarding; 116 int mib[4]; 117 size_t len; 118 char *sockname = NULL; 119 int control_fd; 120 121 conffile = CONF_FILE; 122 ospfd_process = PROC_MAIN; 123 124 log_init(1, LOG_DAEMON); /* log to stderr until daemonized */ 125 log_procinit(log_procnames[ospfd_process]); 126 127 while ((ch = getopt(argc, argv, "cdD:f:ns:v")) != -1) { 128 switch (ch) { 129 case 'c': 130 opts |= OSPFD_OPT_FORCE_DEMOTE; 131 break; 132 case 'd': 133 debug = 1; 134 break; 135 case 'D': 136 if (cmdline_symset(optarg) < 0) 137 log_warnx("could not parse macro definition %s", 138 optarg); 139 break; 140 case 'f': 141 conffile = optarg; 142 break; 143 case 'n': 144 opts |= OSPFD_OPT_NOACTION; 145 break; 146 case 's': 147 sockname = optarg; 148 break; 149 case 'v': 150 if (opts & OSPFD_OPT_VERBOSE) 151 opts |= OSPFD_OPT_VERBOSE2; 152 opts |= OSPFD_OPT_VERBOSE; 153 log_setverbose(1); 154 break; 155 default: 156 usage(); 157 /* NOTREACHED */ 158 } 159 } 160 161 argc -= optind; 162 argv += optind; 163 if (argc > 0) 164 usage(); 165 166 mib[0] = CTL_NET; 167 mib[1] = PF_INET; 168 mib[2] = IPPROTO_IP; 169 mib[3] = IPCTL_FORWARDING; 170 len = sizeof(ipforwarding); 171 if (sysctl(mib, 4, &ipforwarding, &len, NULL, 0) == -1) 172 err(1, "sysctl"); 173 174 if (ipforwarding != 1) { 175 log_warnx("WARNING: IP forwarding NOT enabled, " 176 "running as stub router"); 177 opts |= OSPFD_OPT_STUB_ROUTER; 178 } 179 180 /* fetch interfaces early */ 181 kif_init(); 182 183 /* parse config file */ 184 if ((ospfd_conf = parse_config(conffile, opts)) == NULL) { 185 kif_clear(); 186 exit(1); 187 } 188 if (ospfd_conf->rtr_id.s_addr == 0) 189 ospfd_conf->rtr_id.s_addr = get_rtr_id(); 190 191 if (sockname == NULL) { 192 if (asprintf(&sockname, "%s.%d", OSPFD_SOCKET, 193 ospfd_conf->rdomain) == -1) 194 err(1, "asprintf"); 195 } 196 197 ospfd_conf->csock = sockname; 198 199 if (ospfd_conf->opts & OSPFD_OPT_NOACTION) { 200 if (ospfd_conf->opts & OSPFD_OPT_VERBOSE) 201 print_config(ospfd_conf); 202 else 203 fprintf(stderr, "configuration OK\n"); 204 kif_clear(); 205 exit(0); 206 } 207 208 /* check for root privileges */ 209 if (geteuid()) 210 errx(1, "need root privileges"); 211 212 /* check for ospfd user */ 213 if (getpwnam(OSPFD_USER) == NULL) 214 errx(1, "unknown user %s", OSPFD_USER); 215 216 log_init(debug, LOG_DAEMON); 217 log_setverbose(ospfd_conf->opts & OSPFD_OPT_VERBOSE); 218 219 if ((control_check(ospfd_conf->csock)) == -1) 220 fatalx("ospfd already running"); 221 222 if (!debug) 223 daemon(1, 0); 224 225 log_info("startup"); 226 227 if (socketpair(AF_UNIX, SOCK_STREAM | SOCK_CLOEXEC | SOCK_NONBLOCK, 228 PF_UNSPEC, pipe_parent2ospfe) == -1) 229 fatal("socketpair"); 230 if (socketpair(AF_UNIX, SOCK_STREAM | SOCK_CLOEXEC | SOCK_NONBLOCK, 231 PF_UNSPEC, pipe_parent2rde) == -1) 232 fatal("socketpair"); 233 if (socketpair(AF_UNIX, SOCK_STREAM | SOCK_CLOEXEC | SOCK_NONBLOCK, 234 PF_UNSPEC, pipe_ospfe2rde) == -1) 235 fatal("socketpair"); 236 237 /* start children */ 238 rde_pid = rde(ospfd_conf, pipe_parent2rde, pipe_ospfe2rde, 239 pipe_parent2ospfe); 240 ospfe_pid = ospfe(ospfd_conf, pipe_parent2ospfe, pipe_ospfe2rde, 241 pipe_parent2rde); 242 243 event_init(); 244 245 /* setup signal handler */ 246 signal_set(&ev_sigint, SIGINT, main_sig_handler, NULL); 247 signal_set(&ev_sigterm, SIGTERM, main_sig_handler, NULL); 248 signal_set(&ev_sighup, SIGHUP, main_sig_handler, NULL); 249 signal_add(&ev_sigint, NULL); 250 signal_add(&ev_sigterm, NULL); 251 signal_add(&ev_sighup, NULL); 252 signal(SIGPIPE, SIG_IGN); 253 254 /* setup pipes to children */ 255 close(pipe_parent2ospfe[1]); 256 close(pipe_parent2rde[1]); 257 close(pipe_ospfe2rde[0]); 258 close(pipe_ospfe2rde[1]); 259 260 if ((iev_ospfe = malloc(sizeof(struct imsgev))) == NULL || 261 (iev_rde = malloc(sizeof(struct imsgev))) == NULL) 262 fatal(NULL); 263 imsg_init(&iev_ospfe->ibuf, pipe_parent2ospfe[0]); 264 iev_ospfe->handler = main_dispatch_ospfe; 265 imsg_init(&iev_rde->ibuf, pipe_parent2rde[0]); 266 iev_rde->handler = main_dispatch_rde; 267 268 /* setup event handler */ 269 iev_ospfe->events = EV_READ; 270 event_set(&iev_ospfe->ev, iev_ospfe->ibuf.fd, iev_ospfe->events, 271 iev_ospfe->handler, iev_ospfe); 272 event_add(&iev_ospfe->ev, NULL); 273 274 iev_rde->events = EV_READ; 275 event_set(&iev_rde->ev, iev_rde->ibuf.fd, iev_rde->events, 276 iev_rde->handler, iev_rde); 277 event_add(&iev_rde->ev, NULL); 278 279 if ((control_fd = control_init(ospfd_conf->csock)) == -1) 280 fatalx("control socket setup failed"); 281 main_imsg_compose_ospfe_fd(IMSG_CONTROLFD, 0, control_fd); 282 283 if (unveil("/", "r") == -1) 284 fatal("unveil /"); 285 if (unveil(NULL, NULL) == -1) 286 fatal("unveil"); 287 288 if (kr_init(!(ospfd_conf->flags & OSPFD_FLAG_NO_FIB_UPDATE), 289 ospfd_conf->rdomain, ospfd_conf->redist_label_or_prefix, 290 ospfd_conf->fib_priority) == -1) 291 fatalx("kr_init failed"); 292 293 /* remove unneeded stuff from config */ 294 while ((a = LIST_FIRST(&ospfd_conf->area_list)) != NULL) { 295 LIST_REMOVE(a, entry); 296 area_del(a); 297 } 298 299 event_dispatch(); 300 301 ospfd_shutdown(); 302 /* NOTREACHED */ 303 return (0); 304 } 305 306 __dead void 307 ospfd_shutdown(void) 308 { 309 pid_t pid; 310 int status; 311 struct redistribute *r; 312 313 /* close pipes */ 314 msgbuf_clear(&iev_ospfe->ibuf.w); 315 close(iev_ospfe->ibuf.fd); 316 msgbuf_clear(&iev_rde->ibuf.w); 317 close(iev_rde->ibuf.fd); 318 319 control_cleanup(); 320 while ((r = SIMPLEQ_FIRST(&ospfd_conf->redist_list)) != NULL) { 321 SIMPLEQ_REMOVE_HEAD(&ospfd_conf->redist_list, entry); 322 free(r); 323 } 324 kr_shutdown(); 325 carp_demote_shutdown(); 326 327 log_debug("waiting for children to terminate"); 328 do { 329 pid = wait(&status); 330 if (pid == -1) { 331 if (errno != EINTR && errno != ECHILD) 332 fatal("wait"); 333 } else if (WIFSIGNALED(status)) 334 log_warnx("%s terminated; signal %d", 335 (pid == rde_pid) ? "route decision engine" : 336 "ospf engine", WTERMSIG(status)); 337 } while (pid != -1 || (pid == -1 && errno == EINTR)); 338 339 free(iev_ospfe); 340 free(iev_rde); 341 free(ospfd_conf); 342 343 log_info("terminating"); 344 exit(0); 345 } 346 347 /* imsg handling */ 348 void 349 main_dispatch_ospfe(int fd, short event, void *bula) 350 { 351 struct imsgev *iev = bula; 352 struct imsgbuf *ibuf; 353 struct imsg imsg; 354 struct demote_msg dmsg; 355 ssize_t n; 356 int shut = 0, verbose; 357 358 ibuf = &iev->ibuf; 359 360 if (event & EV_READ) { 361 if ((n = imsg_read(ibuf)) == -1 && errno != EAGAIN) 362 fatal("imsg_read error"); 363 if (n == 0) /* connection closed */ 364 shut = 1; 365 } 366 if (event & EV_WRITE) { 367 if ((n = msgbuf_write(&ibuf->w)) == -1 && errno != EAGAIN) 368 fatal("msgbuf_write"); 369 if (n == 0) /* connection closed */ 370 shut = 1; 371 } 372 373 for (;;) { 374 if ((n = imsg_get(ibuf, &imsg)) == -1) 375 fatal("imsg_get"); 376 377 if (n == 0) 378 break; 379 380 switch (imsg.hdr.type) { 381 case IMSG_CTL_RELOAD: 382 if (ospf_reload() == -1) 383 log_warnx("configuration reload failed"); 384 else 385 log_debug("configuration reloaded"); 386 break; 387 case IMSG_CTL_FIB_COUPLE: 388 kr_fib_couple(); 389 break; 390 case IMSG_CTL_FIB_DECOUPLE: 391 kr_fib_decouple(); 392 break; 393 case IMSG_CTL_FIB_RELOAD: 394 kr_fib_reload(); 395 break; 396 case IMSG_CTL_KROUTE: 397 case IMSG_CTL_KROUTE_ADDR: 398 kr_show_route(&imsg); 399 break; 400 case IMSG_CTL_IFINFO: 401 if (imsg.hdr.len == IMSG_HEADER_SIZE) 402 kr_ifinfo(NULL, imsg.hdr.pid); 403 else if (imsg.hdr.len == IMSG_HEADER_SIZE + IFNAMSIZ) 404 kr_ifinfo(imsg.data, imsg.hdr.pid); 405 else 406 log_warnx("IFINFO request with wrong len"); 407 break; 408 case IMSG_DEMOTE: 409 if (imsg.hdr.len - IMSG_HEADER_SIZE != sizeof(dmsg)) 410 fatalx("invalid size of OE request"); 411 memcpy(&dmsg, imsg.data, sizeof(dmsg)); 412 carp_demote_set(dmsg.demote_group, dmsg.level); 413 break; 414 case IMSG_CTL_LOG_VERBOSE: 415 /* already checked by ospfe */ 416 memcpy(&verbose, imsg.data, sizeof(verbose)); 417 log_setverbose(verbose); 418 break; 419 default: 420 log_debug("main_dispatch_ospfe: error handling imsg %d", 421 imsg.hdr.type); 422 break; 423 } 424 imsg_free(&imsg); 425 } 426 if (!shut) 427 imsg_event_add(iev); 428 else { 429 /* this pipe is dead, so remove the event handler */ 430 event_del(&iev->ev); 431 event_loopexit(NULL); 432 } 433 } 434 435 void 436 main_dispatch_rde(int fd, short event, void *bula) 437 { 438 struct imsgev *iev = bula; 439 struct imsgbuf *ibuf; 440 struct imsg imsg; 441 ssize_t n; 442 int count, shut = 0; 443 444 ibuf = &iev->ibuf; 445 446 if (event & EV_READ) { 447 if ((n = imsg_read(ibuf)) == -1 && errno != EAGAIN) 448 fatal("imsg_read error"); 449 if (n == 0) /* connection closed */ 450 shut = 1; 451 } 452 if (event & EV_WRITE) { 453 if ((n = msgbuf_write(&ibuf->w)) == -1 && errno != EAGAIN) 454 fatal("msgbuf_write"); 455 if (n == 0) /* connection closed */ 456 shut = 1; 457 } 458 459 for (;;) { 460 if ((n = imsg_get(ibuf, &imsg)) == -1) 461 fatal("imsg_get"); 462 463 if (n == 0) 464 break; 465 466 switch (imsg.hdr.type) { 467 case IMSG_KROUTE_CHANGE: 468 count = (imsg.hdr.len - IMSG_HEADER_SIZE) / 469 sizeof(struct kroute); 470 if (kr_change(imsg.data, count)) 471 log_warn("main_dispatch_rde: error changing " 472 "route"); 473 break; 474 case IMSG_KROUTE_DELETE: 475 if (kr_delete(imsg.data)) 476 log_warn("main_dispatch_rde: error deleting " 477 "route"); 478 break; 479 default: 480 log_debug("main_dispatch_rde: error handling imsg %d", 481 imsg.hdr.type); 482 break; 483 } 484 imsg_free(&imsg); 485 } 486 if (!shut) 487 imsg_event_add(iev); 488 else { 489 /* this pipe is dead, so remove the event handler */ 490 event_del(&iev->ev); 491 event_loopexit(NULL); 492 } 493 } 494 495 void 496 main_imsg_compose_ospfe(int type, pid_t pid, void *data, u_int16_t datalen) 497 { 498 if (iev_ospfe) 499 imsg_compose_event(iev_ospfe, type, 0, pid, -1, data, datalen); 500 } 501 502 void 503 main_imsg_compose_ospfe_fd(int type, pid_t pid, int fd) 504 { 505 if (iev_ospfe) 506 imsg_compose_event(iev_ospfe, type, 0, pid, fd, NULL, 0); 507 } 508 509 void 510 main_imsg_compose_rde(int type, pid_t pid, void *data, u_int16_t datalen) 511 { 512 if (iev_rde) 513 imsg_compose_event(iev_rde, type, 0, pid, -1, data, datalen); 514 } 515 516 void 517 imsg_event_add(struct imsgev *iev) 518 { 519 iev->events = EV_READ; 520 if (iev->ibuf.w.queued) 521 iev->events |= EV_WRITE; 522 523 event_del(&iev->ev); 524 event_set(&iev->ev, iev->ibuf.fd, iev->events, iev->handler, iev); 525 event_add(&iev->ev, NULL); 526 } 527 528 int 529 imsg_compose_event(struct imsgev *iev, u_int16_t type, u_int32_t peerid, 530 pid_t pid, int fd, void *data, u_int16_t datalen) 531 { 532 int ret; 533 534 if ((ret = imsg_compose(&iev->ibuf, type, peerid, 535 pid, fd, data, datalen)) != -1) 536 imsg_event_add(iev); 537 return (ret); 538 } 539 540 int 541 ospf_redistribute(struct kroute *kr, u_int32_t *metric) 542 { 543 struct in_addr addr; 544 struct kif *kif; 545 struct redistribute *r; 546 int is_default, depend_ok; 547 548 bzero(&addr, sizeof(addr)); 549 550 /* only allow 0.0.0.0/0 via REDIST_DEFAULT */ 551 is_default = (kr->prefix.s_addr == INADDR_ANY && kr->prefixlen == 0); 552 553 SIMPLEQ_FOREACH(r, &ospfd_conf->redist_list, entry) { 554 if (r->dependon[0] != '\0') { 555 if ((kif = kif_findname(r->dependon, addr, NULL))) 556 depend_ok = ifstate_is_up(kif); 557 else 558 depend_ok = 0; 559 } else 560 depend_ok = 1; 561 562 switch (r->type & ~REDIST_NO) { 563 case REDIST_LABEL: 564 if (kr->rtlabel == r->label) { 565 *metric = depend_ok ? r->metric : 566 r->metric | MAX_METRIC; 567 return (r->type & REDIST_NO ? 0 : 1); 568 } 569 break; 570 case REDIST_STATIC: 571 /* 572 * Dynamic routes are not redistributable. Placed here 573 * so that link local addresses can be redistributed 574 * via a rtlabel. 575 */ 576 if (is_default) 577 continue; 578 if (kr->flags & F_DYNAMIC) 579 continue; 580 if (kr->flags & F_STATIC) { 581 *metric = depend_ok ? r->metric : 582 r->metric | MAX_METRIC; 583 return (r->type & REDIST_NO ? 0 : 1); 584 } 585 break; 586 case REDIST_CONNECTED: 587 if (is_default) 588 continue; 589 if (kr->flags & F_DYNAMIC) 590 continue; 591 if (kr->flags & F_CONNECTED) { 592 *metric = depend_ok ? r->metric : 593 r->metric | MAX_METRIC; 594 return (r->type & REDIST_NO ? 0 : 1); 595 } 596 break; 597 case REDIST_ADDR: 598 if (kr->flags & F_DYNAMIC) 599 continue; 600 601 if (r->addr.s_addr == INADDR_ANY && 602 r->mask.s_addr == INADDR_ANY) { 603 if (is_default) { 604 *metric = depend_ok ? r->metric : 605 r->metric | MAX_METRIC; 606 return (r->type & REDIST_NO ? 0 : 1); 607 } else 608 return (0); 609 } 610 611 if ((kr->prefix.s_addr & r->mask.s_addr) == 612 (r->addr.s_addr & r->mask.s_addr) && 613 kr->prefixlen >= mask2prefixlen(r->mask.s_addr)) { 614 *metric = depend_ok ? r->metric : 615 r->metric | MAX_METRIC; 616 return (r->type & REDIST_NO ? 0 : 1); 617 } 618 break; 619 case REDIST_DEFAULT: 620 if (is_default) { 621 *metric = depend_ok ? r->metric : 622 r->metric | MAX_METRIC; 623 return (r->type & REDIST_NO ? 0 : 1); 624 } 625 break; 626 } 627 } 628 629 return (0); 630 } 631 632 int 633 ospf_reload(void) 634 { 635 struct area *area; 636 struct iface *iface; 637 struct ospfd_conf *xconf; 638 struct redistribute *r; 639 640 if ((xconf = parse_config(conffile, ospfd_conf->opts)) == NULL) 641 return (-1); 642 643 /* No router-id was specified, keep existing value */ 644 if (xconf->rtr_id.s_addr == 0) 645 xconf->rtr_id.s_addr = ospfd_conf->rtr_id.s_addr; 646 647 /* Abort the reload if rtr_id changed */ 648 if (ospfd_conf->rtr_id.s_addr != xconf->rtr_id.s_addr) { 649 log_warnx("router-id changed: restart required"); 650 return (-1); 651 } 652 653 /* send config to childs */ 654 if (ospf_sendboth(IMSG_RECONF_CONF, xconf, sizeof(*xconf)) == -1) 655 return (-1); 656 657 /* send interfaces */ 658 LIST_FOREACH(area, &xconf->area_list, entry) { 659 if (ospf_sendboth(IMSG_RECONF_AREA, area, sizeof(*area)) == -1) 660 return (-1); 661 662 SIMPLEQ_FOREACH(r, &area->redist_list, entry) { 663 main_imsg_compose_rde(IMSG_RECONF_REDIST, 0, r, 664 sizeof(*r)); 665 } 666 LIST_FOREACH(iface, &area->iface_list, entry) { 667 if (ospf_sendboth(IMSG_RECONF_IFACE, iface, 668 sizeof(*iface)) == -1) 669 return (-1); 670 if (iface->auth_type == AUTH_CRYPT) 671 if (md_list_send(&iface->auth_md_list, 672 iev_ospfe) == -1) 673 return (-1); 674 } 675 } 676 677 if (ospf_sendboth(IMSG_RECONF_END, NULL, 0) == -1) 678 return (-1); 679 680 merge_config(ospfd_conf, xconf); 681 /* update redistribute lists */ 682 kr_reload(ospfd_conf->redist_label_or_prefix); 683 return (0); 684 } 685 686 int 687 ospf_sendboth(enum imsg_type type, void *buf, u_int16_t len) 688 { 689 if (imsg_compose_event(iev_ospfe, type, 0, 0, -1, buf, len) == -1) 690 return (-1); 691 if (imsg_compose_event(iev_rde, type, 0, 0, -1, buf, len) == -1) 692 return (-1); 693 return (0); 694 } 695 696 void 697 merge_config(struct ospfd_conf *conf, struct ospfd_conf *xconf) 698 { 699 struct area *a, *xa, *na; 700 struct iface *iface; 701 struct redistribute *r; 702 int rchange = 0; 703 704 conf->flags = xconf->flags; 705 conf->spf_delay = xconf->spf_delay; 706 conf->spf_hold_time = xconf->spf_hold_time; 707 if (SIMPLEQ_EMPTY(&conf->redist_list) != 708 SIMPLEQ_EMPTY(&xconf->redist_list)) 709 rchange = 1; 710 conf->rfc1583compat = xconf->rfc1583compat; 711 conf->redist_label_or_prefix = xconf->redist_label_or_prefix; 712 713 if (ospfd_process == PROC_MAIN) { 714 /* main process does neither use areas nor interfaces */ 715 while ((r = SIMPLEQ_FIRST(&conf->redist_list)) != NULL) { 716 SIMPLEQ_REMOVE_HEAD(&conf->redist_list, entry); 717 free(r); 718 } 719 SIMPLEQ_CONCAT(&conf->redist_list, &xconf->redist_list); 720 721 /* adjust FIB priority if changed */ 722 if (conf->fib_priority != xconf->fib_priority) { 723 kr_fib_decouple(); 724 kr_fib_update_prio(xconf->fib_priority); 725 conf->fib_priority = xconf->fib_priority; 726 kr_fib_couple(); 727 } 728 729 goto done; 730 } 731 732 /* merge areas and interfaces */ 733 for (a = LIST_FIRST(&conf->area_list); a != NULL; a = na) { 734 na = LIST_NEXT(a, entry); 735 /* find deleted areas */ 736 if ((xa = area_find(xconf, a->id)) == NULL) { 737 if (ospfd_process == PROC_OSPF_ENGINE) { 738 LIST_FOREACH(iface, &a->iface_list, entry) 739 if_fsm(iface, IF_EVT_DOWN); 740 } 741 LIST_REMOVE(a, entry); 742 area_del(a); 743 } 744 } 745 746 for (xa = LIST_FIRST(&xconf->area_list); xa != NULL; xa = na) { 747 na = LIST_NEXT(xa, entry); 748 if ((a = area_find(conf, xa->id)) == NULL) { 749 LIST_REMOVE(xa, entry); 750 LIST_INSERT_HEAD(&conf->area_list, xa, entry); 751 if (ospfd_process == PROC_OSPF_ENGINE) { 752 /* start interfaces */ 753 ospfe_demote_area(xa, 0); 754 LIST_FOREACH(iface, &xa->iface_list, entry) { 755 if_init(conf, iface); 756 if (if_fsm(iface, IF_EVT_UP)) { 757 log_debug("error starting " 758 "interface %s", 759 iface->name); 760 } 761 } 762 } 763 /* no need to merge interfaces */ 764 continue; 765 } 766 /* 767 * stub is not yet used but switching between stub and normal 768 * will be another painful job. 769 */ 770 if (a->stub != xa->stub && ospfd_process == PROC_OSPF_ENGINE) 771 a->dirty = 1; /* force rtr LSA update */ 772 if (xa->stub && ospfd_process == PROC_RDE_ENGINE) { 773 while ((r = SIMPLEQ_FIRST(&a->redist_list)) != NULL) { 774 SIMPLEQ_REMOVE_HEAD(&a->redist_list, entry); 775 free(r); 776 } 777 778 SIMPLEQ_CONCAT(&a->redist_list, &xa->redist_list); 779 } 780 781 a->stub = xa->stub; 782 a->stub_default_cost = xa->stub_default_cost; 783 if (ospfd_process == PROC_RDE_ENGINE) 784 a->dirty = 1; /* force SPF tree recalculation */ 785 786 /* merge interfaces */ 787 if (merge_interfaces(a, xa) && 788 ospfd_process == PROC_OSPF_ENGINE) 789 a->dirty = 1; /* force rtr LSA update */ 790 } 791 792 if (ospfd_process == PROC_OSPF_ENGINE) { 793 LIST_FOREACH(a, &conf->area_list, entry) { 794 LIST_FOREACH(iface, &a->iface_list, entry) { 795 if (iface->state == IF_STA_NEW) { 796 iface->state = IF_STA_DOWN; 797 if_init(conf, iface); 798 if (if_fsm(iface, IF_EVT_UP)) { 799 log_debug("error starting " 800 "interface %s", 801 iface->name); 802 } 803 } 804 } 805 if (a->dirty || rchange) { 806 a->dirty = 0; 807 orig_rtr_lsa(a); 808 } 809 } 810 } 811 if (ospfd_process == PROC_RDE_ENGINE) { 812 LIST_FOREACH(a, &conf->area_list, entry) { 813 if (a->dirty) { 814 start_spf_timer(); 815 break; 816 } 817 } 818 } 819 820 done: 821 while ((a = LIST_FIRST(&xconf->area_list)) != NULL) { 822 LIST_REMOVE(a, entry); 823 area_del(a); 824 } 825 free(xconf); 826 } 827 828 int 829 merge_interfaces(struct area *a, struct area *xa) 830 { 831 struct iface *i, *xi, *ni; 832 int dirty = 0; 833 834 /* problems: 835 * - new interfaces (easy) 836 * - deleted interfaces 837 * - changing passive (painful?) 838 */ 839 for (i = LIST_FIRST(&a->iface_list); i != NULL; i = ni) { 840 ni = LIST_NEXT(i, entry); 841 if (iface_lookup(xa, i) == NULL) { 842 log_debug("merge_interfaces: proc %d area %s removing " 843 "interface %s", ospfd_process, inet_ntoa(a->id), 844 i->name); 845 if (ospfd_process == PROC_OSPF_ENGINE) 846 if_fsm(i, IF_EVT_DOWN); 847 else if (ospfd_process == PROC_RDE_ENGINE) 848 rde_nbr_iface_del(i); 849 LIST_REMOVE(i, entry); 850 if_del(i); 851 dirty = 1; /* force rtr LSA update */ 852 } 853 } 854 855 for (xi = LIST_FIRST(&xa->iface_list); xi != NULL; xi = ni) { 856 ni = LIST_NEXT(xi, entry); 857 if ((i = iface_lookup(a, xi)) == NULL) { 858 /* new interface but delay initialisation */ 859 log_debug("merge_interfaces: proc %d area %s adding " 860 "interface %s", ospfd_process, inet_ntoa(a->id), 861 xi->name); 862 LIST_REMOVE(xi, entry); 863 LIST_INSERT_HEAD(&a->iface_list, xi, entry); 864 xi->area = a; 865 if (ospfd_process == PROC_OSPF_ENGINE) 866 xi->state = IF_STA_NEW; 867 continue; 868 } 869 log_debug("merge_interfaces: proc %d area %s merging " 870 "interface %s", ospfd_process, inet_ntoa(a->id), i->name); 871 i->dst = xi->dst; 872 i->abr_id = xi->abr_id; 873 i->baudrate = xi->baudrate; 874 i->dead_interval = xi->dead_interval; 875 i->mtu = xi->mtu; 876 i->transmit_delay = xi->transmit_delay; 877 i->hello_interval = xi->hello_interval; 878 i->rxmt_interval = xi->rxmt_interval; 879 if (i->metric != xi->metric) 880 dirty = 1; 881 i->metric = xi->metric; 882 i->priority = xi->priority; 883 if (i->self) 884 i->self->priority = i->priority; 885 i->flags = xi->flags; /* needed? */ 886 i->if_type = xi->if_type; /* needed? */ 887 i->linkstate = xi->linkstate; /* needed? */ 888 889 i->auth_type = xi->auth_type; 890 strncpy(i->auth_key, xi->auth_key, MAX_SIMPLE_AUTH_LEN); 891 md_list_clr(&i->auth_md_list); 892 md_list_copy(&i->auth_md_list, &xi->auth_md_list); 893 894 strlcpy(i->dependon, xi->dependon, 895 sizeof(i->dependon)); 896 i->depend_ok = xi->depend_ok; 897 898 if (i->passive != xi->passive) { 899 /* need to restart interface to cope with this change */ 900 if (ospfd_process == PROC_OSPF_ENGINE) 901 if_fsm(i, IF_EVT_DOWN); 902 i->passive = xi->passive; 903 if (ospfd_process == PROC_OSPF_ENGINE) 904 if_fsm(i, IF_EVT_UP); 905 } 906 907 if (i->type != xi->type) { 908 /* restart interface to enable or disable DR election */ 909 if (ospfd_process == PROC_OSPF_ENGINE) 910 if_fsm(i, IF_EVT_DOWN); 911 i->type = xi->type; 912 if (ospfd_process == PROC_OSPF_ENGINE) 913 if_fsm(i, IF_EVT_UP); 914 } 915 } 916 return (dirty); 917 } 918 919 struct iface * 920 iface_lookup(struct area *area, struct iface *iface) 921 { 922 struct iface *i; 923 924 LIST_FOREACH(i, &area->iface_list, entry) 925 if (i->ifindex == iface->ifindex && 926 i->addr.s_addr == iface->addr.s_addr && 927 i->mask.s_addr == iface->mask.s_addr) 928 return (i); 929 return (NULL); 930 } 931 932 int 933 ifstate_is_up(struct kif *kif) 934 { 935 if (!(kif->flags & IFF_UP)) 936 return (0); 937 if (kif->if_type == IFT_CARP && 938 kif->link_state == LINK_STATE_UNKNOWN) 939 return (0); 940 return LINK_STATE_IS_UP(kif->link_state); 941 } 942