1 /* $OpenBSD: ospfd.c,v 1.111 2020/01/21 20:38:52 remi 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 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 [-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(ospfd_conf->csock, "c") == -1) 286 fatal("unveil"); 287 if (unveil(NULL, NULL) == -1) 288 fatal("unveil"); 289 290 if (kr_init(!(ospfd_conf->flags & OSPFD_FLAG_NO_FIB_UPDATE), 291 ospfd_conf->rdomain, ospfd_conf->redist_label_or_prefix, 292 ospfd_conf->fib_priority) == -1) 293 fatalx("kr_init failed"); 294 295 /* remove unneeded stuff from config */ 296 while ((a = LIST_FIRST(&ospfd_conf->area_list)) != NULL) { 297 LIST_REMOVE(a, entry); 298 area_del(a); 299 } 300 301 event_dispatch(); 302 303 ospfd_shutdown(); 304 /* NOTREACHED */ 305 return (0); 306 } 307 308 __dead void 309 ospfd_shutdown(void) 310 { 311 pid_t pid; 312 int status; 313 struct redistribute *r; 314 315 /* close pipes */ 316 msgbuf_clear(&iev_ospfe->ibuf.w); 317 close(iev_ospfe->ibuf.fd); 318 msgbuf_clear(&iev_rde->ibuf.w); 319 close(iev_rde->ibuf.fd); 320 321 control_cleanup(ospfd_conf->csock); 322 while ((r = SIMPLEQ_FIRST(&ospfd_conf->redist_list)) != NULL) { 323 SIMPLEQ_REMOVE_HEAD(&ospfd_conf->redist_list, entry); 324 free(r); 325 } 326 kr_shutdown(); 327 carp_demote_shutdown(); 328 329 log_debug("waiting for children to terminate"); 330 do { 331 pid = wait(&status); 332 if (pid == -1) { 333 if (errno != EINTR && errno != ECHILD) 334 fatal("wait"); 335 } else if (WIFSIGNALED(status)) 336 log_warnx("%s terminated; signal %d", 337 (pid == rde_pid) ? "route decision engine" : 338 "ospf engine", WTERMSIG(status)); 339 } while (pid != -1 || (pid == -1 && errno == EINTR)); 340 341 free(iev_ospfe); 342 free(iev_rde); 343 free(ospfd_conf); 344 345 log_info("terminating"); 346 exit(0); 347 } 348 349 /* imsg handling */ 350 /* ARGSUSED */ 351 void 352 main_dispatch_ospfe(int fd, short event, void *bula) 353 { 354 struct imsgev *iev = bula; 355 struct imsgbuf *ibuf; 356 struct imsg imsg; 357 struct demote_msg dmsg; 358 ssize_t n; 359 int shut = 0, verbose; 360 361 ibuf = &iev->ibuf; 362 363 if (event & EV_READ) { 364 if ((n = imsg_read(ibuf)) == -1 && errno != EAGAIN) 365 fatal("imsg_read error"); 366 if (n == 0) /* connection closed */ 367 shut = 1; 368 } 369 if (event & EV_WRITE) { 370 if ((n = msgbuf_write(&ibuf->w)) == -1 && errno != EAGAIN) 371 fatal("msgbuf_write"); 372 if (n == 0) /* connection closed */ 373 shut = 1; 374 } 375 376 for (;;) { 377 if ((n = imsg_get(ibuf, &imsg)) == -1) 378 fatal("imsg_get"); 379 380 if (n == 0) 381 break; 382 383 switch (imsg.hdr.type) { 384 case IMSG_CTL_RELOAD: 385 if (ospf_reload() == -1) 386 log_warnx("configuration reload failed"); 387 else 388 log_debug("configuration reloaded"); 389 break; 390 case IMSG_CTL_FIB_COUPLE: 391 kr_fib_couple(); 392 break; 393 case IMSG_CTL_FIB_DECOUPLE: 394 kr_fib_decouple(); 395 break; 396 case IMSG_CTL_FIB_RELOAD: 397 kr_fib_reload(); 398 break; 399 case IMSG_CTL_KROUTE: 400 case IMSG_CTL_KROUTE_ADDR: 401 kr_show_route(&imsg); 402 break; 403 case IMSG_CTL_IFINFO: 404 if (imsg.hdr.len == IMSG_HEADER_SIZE) 405 kr_ifinfo(NULL, imsg.hdr.pid); 406 else if (imsg.hdr.len == IMSG_HEADER_SIZE + IFNAMSIZ) 407 kr_ifinfo(imsg.data, imsg.hdr.pid); 408 else 409 log_warnx("IFINFO request with wrong len"); 410 break; 411 case IMSG_DEMOTE: 412 if (imsg.hdr.len - IMSG_HEADER_SIZE != sizeof(dmsg)) 413 fatalx("invalid size of OE request"); 414 memcpy(&dmsg, imsg.data, sizeof(dmsg)); 415 carp_demote_set(dmsg.demote_group, dmsg.level); 416 break; 417 case IMSG_CTL_LOG_VERBOSE: 418 /* already checked by ospfe */ 419 memcpy(&verbose, imsg.data, sizeof(verbose)); 420 log_setverbose(verbose); 421 break; 422 default: 423 log_debug("main_dispatch_ospfe: error handling imsg %d", 424 imsg.hdr.type); 425 break; 426 } 427 imsg_free(&imsg); 428 } 429 if (!shut) 430 imsg_event_add(iev); 431 else { 432 /* this pipe is dead, so remove the event handler */ 433 event_del(&iev->ev); 434 event_loopexit(NULL); 435 } 436 } 437 438 /* ARGSUSED */ 439 void 440 main_dispatch_rde(int fd, short event, void *bula) 441 { 442 struct imsgev *iev = bula; 443 struct imsgbuf *ibuf; 444 struct imsg imsg; 445 ssize_t n; 446 int count, shut = 0; 447 448 ibuf = &iev->ibuf; 449 450 if (event & EV_READ) { 451 if ((n = imsg_read(ibuf)) == -1 && errno != EAGAIN) 452 fatal("imsg_read error"); 453 if (n == 0) /* connection closed */ 454 shut = 1; 455 } 456 if (event & EV_WRITE) { 457 if ((n = msgbuf_write(&ibuf->w)) == -1 && errno != EAGAIN) 458 fatal("msgbuf_write"); 459 if (n == 0) /* connection closed */ 460 shut = 1; 461 } 462 463 for (;;) { 464 if ((n = imsg_get(ibuf, &imsg)) == -1) 465 fatal("imsg_get"); 466 467 if (n == 0) 468 break; 469 470 switch (imsg.hdr.type) { 471 case IMSG_KROUTE_CHANGE: 472 count = (imsg.hdr.len - IMSG_HEADER_SIZE) / 473 sizeof(struct kroute); 474 if (kr_change(imsg.data, count)) 475 log_warn("main_dispatch_rde: error changing " 476 "route"); 477 break; 478 case IMSG_KROUTE_DELETE: 479 if (kr_delete(imsg.data)) 480 log_warn("main_dispatch_rde: error deleting " 481 "route"); 482 break; 483 default: 484 log_debug("main_dispatch_rde: error handling imsg %d", 485 imsg.hdr.type); 486 break; 487 } 488 imsg_free(&imsg); 489 } 490 if (!shut) 491 imsg_event_add(iev); 492 else { 493 /* this pipe is dead, so remove the event handler */ 494 event_del(&iev->ev); 495 event_loopexit(NULL); 496 } 497 } 498 499 void 500 main_imsg_compose_ospfe(int type, pid_t pid, void *data, u_int16_t datalen) 501 { 502 if (iev_ospfe) 503 imsg_compose_event(iev_ospfe, type, 0, pid, -1, data, datalen); 504 } 505 506 void 507 main_imsg_compose_ospfe_fd(int type, pid_t pid, int fd) 508 { 509 if (iev_ospfe) 510 imsg_compose_event(iev_ospfe, type, 0, pid, fd, NULL, 0); 511 } 512 513 void 514 main_imsg_compose_rde(int type, pid_t pid, void *data, u_int16_t datalen) 515 { 516 if (iev_rde) 517 imsg_compose_event(iev_rde, type, 0, pid, -1, data, datalen); 518 } 519 520 void 521 imsg_event_add(struct imsgev *iev) 522 { 523 iev->events = EV_READ; 524 if (iev->ibuf.w.queued) 525 iev->events |= EV_WRITE; 526 527 event_del(&iev->ev); 528 event_set(&iev->ev, iev->ibuf.fd, iev->events, iev->handler, iev); 529 event_add(&iev->ev, NULL); 530 } 531 532 int 533 imsg_compose_event(struct imsgev *iev, u_int16_t type, u_int32_t peerid, 534 pid_t pid, int fd, void *data, u_int16_t datalen) 535 { 536 int ret; 537 538 if ((ret = imsg_compose(&iev->ibuf, type, peerid, 539 pid, fd, data, datalen)) != -1) 540 imsg_event_add(iev); 541 return (ret); 542 } 543 544 int 545 ospf_redistribute(struct kroute *kr, u_int32_t *metric) 546 { 547 struct in_addr addr; 548 struct kif *kif; 549 struct redistribute *r; 550 int is_default, depend_ok; 551 552 bzero(&addr, sizeof(addr)); 553 554 /* only allow 0.0.0.0/0 via REDIST_DEFAULT */ 555 is_default = (kr->prefix.s_addr == INADDR_ANY && kr->prefixlen == 0); 556 557 SIMPLEQ_FOREACH(r, &ospfd_conf->redist_list, entry) { 558 if (r->dependon[0] != '\0') { 559 if ((kif = kif_findname(r->dependon, addr, NULL))) 560 depend_ok = ifstate_is_up(kif); 561 else 562 depend_ok = 0; 563 } else 564 depend_ok = 1; 565 566 switch (r->type & ~REDIST_NO) { 567 case REDIST_LABEL: 568 if (kr->rtlabel == r->label) { 569 *metric = depend_ok ? r->metric : 570 r->metric | MAX_METRIC; 571 return (r->type & REDIST_NO ? 0 : 1); 572 } 573 break; 574 case REDIST_STATIC: 575 /* 576 * Dynamic routes are not redistributable. Placed here 577 * so that link local addresses can be redistributed 578 * via a rtlabel. 579 */ 580 if (is_default) 581 continue; 582 if (kr->flags & F_DYNAMIC) 583 continue; 584 if (kr->flags & F_STATIC) { 585 *metric = depend_ok ? r->metric : 586 r->metric | MAX_METRIC; 587 return (r->type & REDIST_NO ? 0 : 1); 588 } 589 break; 590 case REDIST_CONNECTED: 591 if (is_default) 592 continue; 593 if (kr->flags & F_DYNAMIC) 594 continue; 595 if (kr->flags & F_CONNECTED) { 596 *metric = depend_ok ? r->metric : 597 r->metric | MAX_METRIC; 598 return (r->type & REDIST_NO ? 0 : 1); 599 } 600 break; 601 case REDIST_ADDR: 602 if (kr->flags & F_DYNAMIC) 603 continue; 604 605 if (r->addr.s_addr == INADDR_ANY && 606 r->mask.s_addr == INADDR_ANY) { 607 if (is_default) { 608 *metric = depend_ok ? r->metric : 609 r->metric | MAX_METRIC; 610 return (r->type & REDIST_NO ? 0 : 1); 611 } else 612 return (0); 613 } 614 615 if ((kr->prefix.s_addr & r->mask.s_addr) == 616 (r->addr.s_addr & r->mask.s_addr) && 617 kr->prefixlen >= mask2prefixlen(r->mask.s_addr)) { 618 *metric = depend_ok ? r->metric : 619 r->metric | MAX_METRIC; 620 return (r->type & REDIST_NO ? 0 : 1); 621 } 622 break; 623 case REDIST_DEFAULT: 624 if (is_default) { 625 *metric = depend_ok ? r->metric : 626 r->metric | MAX_METRIC; 627 return (r->type & REDIST_NO ? 0 : 1); 628 } 629 break; 630 } 631 } 632 633 return (0); 634 } 635 636 int 637 ospf_reload(void) 638 { 639 struct area *area; 640 struct iface *iface; 641 struct ospfd_conf *xconf; 642 struct redistribute *r; 643 644 if ((xconf = parse_config(conffile, ospfd_conf->opts)) == NULL) 645 return (-1); 646 647 /* No router-id was specified, keep existing value */ 648 if (xconf->rtr_id.s_addr == 0) 649 xconf->rtr_id.s_addr = ospfd_conf->rtr_id.s_addr; 650 651 /* Abort the reload if rtr_id changed */ 652 if (ospfd_conf->rtr_id.s_addr != xconf->rtr_id.s_addr) { 653 log_warnx("router-id changed: restart required"); 654 return (-1); 655 } 656 657 /* send config to childs */ 658 if (ospf_sendboth(IMSG_RECONF_CONF, xconf, sizeof(*xconf)) == -1) 659 return (-1); 660 661 /* send interfaces */ 662 LIST_FOREACH(area, &xconf->area_list, entry) { 663 if (ospf_sendboth(IMSG_RECONF_AREA, area, sizeof(*area)) == -1) 664 return (-1); 665 666 SIMPLEQ_FOREACH(r, &area->redist_list, entry) { 667 main_imsg_compose_rde(IMSG_RECONF_REDIST, 0, r, 668 sizeof(*r)); 669 } 670 LIST_FOREACH(iface, &area->iface_list, entry) { 671 if (ospf_sendboth(IMSG_RECONF_IFACE, iface, 672 sizeof(*iface)) == -1) 673 return (-1); 674 if (iface->auth_type == AUTH_CRYPT) 675 if (md_list_send(&iface->auth_md_list, 676 iev_ospfe) == -1) 677 return (-1); 678 } 679 } 680 681 if (ospf_sendboth(IMSG_RECONF_END, NULL, 0) == -1) 682 return (-1); 683 684 merge_config(ospfd_conf, xconf); 685 /* update redistribute lists */ 686 kr_reload(ospfd_conf->redist_label_or_prefix); 687 return (0); 688 } 689 690 int 691 ospf_sendboth(enum imsg_type type, void *buf, u_int16_t len) 692 { 693 if (imsg_compose_event(iev_ospfe, type, 0, 0, -1, buf, len) == -1) 694 return (-1); 695 if (imsg_compose_event(iev_rde, type, 0, 0, -1, buf, len) == -1) 696 return (-1); 697 return (0); 698 } 699 700 void 701 merge_config(struct ospfd_conf *conf, struct ospfd_conf *xconf) 702 { 703 struct area *a, *xa, *na; 704 struct iface *iface; 705 struct redistribute *r; 706 int rchange = 0; 707 708 conf->flags = xconf->flags; 709 conf->spf_delay = xconf->spf_delay; 710 conf->spf_hold_time = xconf->spf_hold_time; 711 if (SIMPLEQ_EMPTY(&conf->redist_list) != 712 SIMPLEQ_EMPTY(&xconf->redist_list)) 713 rchange = 1; 714 conf->rfc1583compat = xconf->rfc1583compat; 715 conf->redist_label_or_prefix = xconf->redist_label_or_prefix; 716 717 if (ospfd_process == PROC_MAIN) { 718 /* main process does neither use areas nor interfaces */ 719 while ((r = SIMPLEQ_FIRST(&conf->redist_list)) != NULL) { 720 SIMPLEQ_REMOVE_HEAD(&conf->redist_list, entry); 721 free(r); 722 } 723 while ((r = SIMPLEQ_FIRST(&xconf->redist_list)) != NULL) { 724 SIMPLEQ_REMOVE_HEAD(&xconf->redist_list, entry); 725 SIMPLEQ_INSERT_TAIL(&conf->redist_list, r, entry); 726 } 727 728 /* adjust FIB priority if changed */ 729 if (conf->fib_priority != xconf->fib_priority) { 730 kr_fib_decouple(); 731 kr_fib_update_prio(xconf->fib_priority); 732 conf->fib_priority = xconf->fib_priority; 733 kr_fib_couple(); 734 } 735 736 goto done; 737 } 738 739 /* merge areas and interfaces */ 740 for (a = LIST_FIRST(&conf->area_list); a != NULL; a = na) { 741 na = LIST_NEXT(a, entry); 742 /* find deleted areas */ 743 if ((xa = area_find(xconf, a->id)) == NULL) { 744 if (ospfd_process == PROC_OSPF_ENGINE) { 745 LIST_FOREACH(iface, &a->iface_list, entry) 746 if_fsm(iface, IF_EVT_DOWN); 747 } 748 LIST_REMOVE(a, entry); 749 area_del(a); 750 } 751 } 752 753 for (xa = LIST_FIRST(&xconf->area_list); xa != NULL; xa = na) { 754 na = LIST_NEXT(xa, entry); 755 if ((a = area_find(conf, xa->id)) == NULL) { 756 LIST_REMOVE(xa, entry); 757 LIST_INSERT_HEAD(&conf->area_list, xa, entry); 758 if (ospfd_process == PROC_OSPF_ENGINE) { 759 /* start interfaces */ 760 ospfe_demote_area(xa, 0); 761 LIST_FOREACH(iface, &xa->iface_list, entry) { 762 if_init(conf, iface); 763 if (if_fsm(iface, IF_EVT_UP)) { 764 log_debug("error starting " 765 "interface %s", 766 iface->name); 767 } 768 } 769 } 770 /* no need to merge interfaces */ 771 continue; 772 } 773 /* 774 * stub is not yet used but switching between stub and normal 775 * will be another painful job. 776 */ 777 if (a->stub != xa->stub && ospfd_process == PROC_OSPF_ENGINE) 778 a->dirty = 1; /* force rtr LSA update */ 779 if (xa->stub && ospfd_process == PROC_RDE_ENGINE) { 780 while ((r = SIMPLEQ_FIRST(&a->redist_list)) != NULL) { 781 SIMPLEQ_REMOVE_HEAD(&a->redist_list, entry); 782 free(r); 783 } 784 785 while ((r = SIMPLEQ_FIRST(&xa->redist_list)) != NULL) { 786 SIMPLEQ_REMOVE_HEAD(&xa->redist_list, entry); 787 SIMPLEQ_INSERT_TAIL(&a->redist_list, r, entry); 788 } 789 } 790 791 a->stub = xa->stub; 792 a->stub_default_cost = xa->stub_default_cost; 793 if (ospfd_process == PROC_RDE_ENGINE) 794 a->dirty = 1; /* force SPF tree recalculation */ 795 796 /* merge interfaces */ 797 if (merge_interfaces(a, xa) && 798 ospfd_process == PROC_OSPF_ENGINE) 799 a->dirty = 1; /* force rtr LSA update */ 800 } 801 802 if (ospfd_process == PROC_OSPF_ENGINE) { 803 LIST_FOREACH(a, &conf->area_list, entry) { 804 LIST_FOREACH(iface, &a->iface_list, entry) { 805 if (iface->state == IF_STA_NEW) { 806 iface->state = IF_STA_DOWN; 807 if_init(conf, iface); 808 if (if_fsm(iface, IF_EVT_UP)) { 809 log_debug("error starting " 810 "interface %s", 811 iface->name); 812 } 813 } 814 } 815 if (a->dirty || rchange) { 816 a->dirty = 0; 817 orig_rtr_lsa(a); 818 } 819 } 820 } 821 if (ospfd_process == PROC_RDE_ENGINE) { 822 LIST_FOREACH(a, &conf->area_list, entry) { 823 if (a->dirty) { 824 start_spf_timer(); 825 break; 826 } 827 } 828 } 829 830 done: 831 while ((a = LIST_FIRST(&xconf->area_list)) != NULL) { 832 LIST_REMOVE(a, entry); 833 area_del(a); 834 } 835 free(xconf); 836 } 837 838 int 839 merge_interfaces(struct area *a, struct area *xa) 840 { 841 struct iface *i, *xi, *ni; 842 int dirty = 0; 843 844 /* problems: 845 * - new interfaces (easy) 846 * - deleted interfaces 847 * - changing passive (painful?) 848 */ 849 for (i = LIST_FIRST(&a->iface_list); i != NULL; i = ni) { 850 ni = LIST_NEXT(i, entry); 851 if (iface_lookup(xa, i) == NULL) { 852 log_debug("merge_interfaces: proc %d area %s removing " 853 "interface %s", ospfd_process, inet_ntoa(a->id), 854 i->name); 855 if (ospfd_process == PROC_OSPF_ENGINE) 856 if_fsm(i, IF_EVT_DOWN); 857 else if (ospfd_process == PROC_RDE_ENGINE) 858 rde_nbr_iface_del(i); 859 LIST_REMOVE(i, entry); 860 if_del(i); 861 dirty = 1; /* force rtr LSA update */ 862 } 863 } 864 865 for (xi = LIST_FIRST(&xa->iface_list); xi != NULL; xi = ni) { 866 ni = LIST_NEXT(xi, entry); 867 if ((i = iface_lookup(a, xi)) == NULL) { 868 /* new interface but delay initialisation */ 869 log_debug("merge_interfaces: proc %d area %s adding " 870 "interface %s", ospfd_process, inet_ntoa(a->id), 871 xi->name); 872 LIST_REMOVE(xi, entry); 873 LIST_INSERT_HEAD(&a->iface_list, xi, entry); 874 xi->area = a; 875 if (ospfd_process == PROC_OSPF_ENGINE) 876 xi->state = IF_STA_NEW; 877 continue; 878 } 879 log_debug("merge_interfaces: proc %d area %s merging " 880 "interface %s", ospfd_process, inet_ntoa(a->id), i->name); 881 i->dst = xi->dst; 882 i->abr_id = xi->abr_id; 883 i->baudrate = xi->baudrate; 884 i->dead_interval = xi->dead_interval; 885 i->mtu = xi->mtu; 886 i->transmit_delay = xi->transmit_delay; 887 i->hello_interval = xi->hello_interval; 888 i->rxmt_interval = xi->rxmt_interval; 889 if (i->metric != xi->metric) 890 dirty = 1; 891 i->metric = xi->metric; 892 i->priority = xi->priority; 893 if (i->self) 894 i->self->priority = i->priority; 895 i->flags = xi->flags; /* needed? */ 896 i->if_type = xi->if_type; /* needed? */ 897 i->linkstate = xi->linkstate; /* needed? */ 898 899 i->auth_type = xi->auth_type; 900 strncpy(i->auth_key, xi->auth_key, MAX_SIMPLE_AUTH_LEN); 901 md_list_clr(&i->auth_md_list); 902 md_list_copy(&i->auth_md_list, &xi->auth_md_list); 903 904 strlcpy(i->dependon, xi->dependon, 905 sizeof(i->dependon)); 906 i->depend_ok = xi->depend_ok; 907 908 if (i->passive != xi->passive) { 909 /* need to restart interface to cope with this change */ 910 if (ospfd_process == PROC_OSPF_ENGINE) 911 if_fsm(i, IF_EVT_DOWN); 912 i->passive = xi->passive; 913 if (ospfd_process == PROC_OSPF_ENGINE) 914 if_fsm(i, IF_EVT_UP); 915 } 916 917 if (i->type != xi->type) { 918 /* restart interface to enable or disable DR election */ 919 if (ospfd_process == PROC_OSPF_ENGINE) 920 if_fsm(i, IF_EVT_DOWN); 921 i->type = xi->type; 922 if (ospfd_process == PROC_OSPF_ENGINE) 923 if_fsm(i, IF_EVT_UP); 924 } 925 } 926 return (dirty); 927 } 928 929 struct iface * 930 iface_lookup(struct area *area, struct iface *iface) 931 { 932 struct iface *i; 933 934 LIST_FOREACH(i, &area->iface_list, entry) 935 if (i->ifindex == iface->ifindex && 936 i->addr.s_addr == iface->addr.s_addr && 937 i->mask.s_addr == iface->mask.s_addr) 938 return (i); 939 return (NULL); 940 } 941 942 int 943 ifstate_is_up(struct kif *kif) 944 { 945 if (!(kif->flags & IFF_UP)) 946 return (0); 947 if (kif->if_type == IFT_CARP && 948 kif->link_state == LINK_STATE_UNKNOWN) 949 return (0); 950 return LINK_STATE_IS_UP(kif->link_state); 951 } 952