bgpd.c revision 1.170
1/* $OpenBSD: bgpd.c,v 1.170 2012/11/02 18:02:45 florian Exp $ */ 2 3/* 4 * Copyright (c) 2003, 2004 Henning Brauer <henning@openbsd.org> 5 * 6 * Permission to use, copy, modify, and distribute this software for any 7 * purpose with or without fee is hereby granted, provided that the above 8 * copyright notice and this permission notice appear in all copies. 9 * 10 * THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES 11 * WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF 12 * MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR 13 * ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES 14 * WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN 15 * ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF 16 * OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE. 17 */ 18 19#include <sys/types.h> 20#include <sys/socket.h> 21#include <sys/wait.h> 22#include <netinet/in.h> 23#include <arpa/inet.h> 24#include <err.h> 25#include <errno.h> 26#include <fcntl.h> 27#include <poll.h> 28#include <pwd.h> 29#include <signal.h> 30#include <stdio.h> 31#include <stdlib.h> 32#include <string.h> 33#include <unistd.h> 34 35#include "bgpd.h" 36#include "mrt.h" 37#include "session.h" 38 39void sighdlr(int); 40__dead void usage(void); 41int main(int, char *[]); 42int check_child(pid_t, const char *); 43int send_filterset(struct imsgbuf *, struct filter_set_head *); 44int reconfigure(char *, struct bgpd_config *, struct mrt_head *, 45 struct peer **); 46int dispatch_imsg(struct imsgbuf *, int); 47int control_setup(struct bgpd_config *); 48 49int rfd = -1; 50int cflags; 51volatile sig_atomic_t mrtdump; 52volatile sig_atomic_t quit; 53volatile sig_atomic_t sigchld; 54volatile sig_atomic_t reconfig; 55pid_t reconfpid; 56int reconfpending; 57struct imsgbuf *ibuf_se; 58struct imsgbuf *ibuf_rde; 59struct rib_names ribnames = SIMPLEQ_HEAD_INITIALIZER(ribnames); 60char *cname; 61char *rcname; 62 63void 64sighdlr(int sig) 65{ 66 switch (sig) { 67 case SIGTERM: 68 case SIGINT: 69 quit = 1; 70 break; 71 case SIGCHLD: 72 sigchld = 1; 73 break; 74 case SIGHUP: 75 reconfig = 1; 76 break; 77 case SIGALRM: 78 case SIGUSR1: 79 mrtdump = 1; 80 break; 81 } 82} 83 84__dead void 85usage(void) 86{ 87 extern char *__progname; 88 89 fprintf(stderr, "usage: %s [-cdnv] [-D macro=value] [-f file]\n", 90 __progname); 91 exit(1); 92} 93 94#define PFD_PIPE_SESSION 0 95#define PFD_PIPE_ROUTE 1 96#define PFD_SOCK_ROUTE 2 97#define POLL_MAX 3 98#define MAX_TIMEOUT 3600 99 100int 101main(int argc, char *argv[]) 102{ 103 struct bgpd_config conf; 104 struct mrt_head mrt_l; 105 struct peer *peer_l, *p; 106 struct mrt *m; 107 struct listen_addr *la; 108 struct pollfd pfd[POLL_MAX]; 109 pid_t io_pid = 0, rde_pid = 0, pid; 110 char *conffile; 111 int debug = 0; 112 int ch, timeout, nfds; 113 int pipe_m2s[2]; 114 int pipe_m2r[2]; 115 int pipe_s2r[2]; 116 int pipe_s2r_c[2]; 117 118 conffile = CONFFILE; 119 bgpd_process = PROC_MAIN; 120 121 log_init(1); /* log to stderr until daemonized */ 122 log_verbose(1); 123 124 bzero(&conf, sizeof(conf)); 125 LIST_INIT(&mrt_l); 126 peer_l = NULL; 127 128 while ((ch = getopt(argc, argv, "cdD:f:nv")) != -1) { 129 switch (ch) { 130 case 'c': 131 conf.opts |= BGPD_OPT_FORCE_DEMOTE; 132 break; 133 case 'd': 134 debug = 1; 135 break; 136 case 'D': 137 if (cmdline_symset(optarg) < 0) 138 log_warnx("could not parse macro definition %s", 139 optarg); 140 break; 141 case 'f': 142 conffile = optarg; 143 break; 144 case 'n': 145 conf.opts |= BGPD_OPT_NOACTION; 146 break; 147 case 'v': 148 if (conf.opts & BGPD_OPT_VERBOSE) 149 conf.opts |= BGPD_OPT_VERBOSE2; 150 conf.opts |= BGPD_OPT_VERBOSE; 151 log_verbose(1); 152 break; 153 default: 154 usage(); 155 /* NOTREACHED */ 156 } 157 } 158 159 argc -= optind; 160 argv += optind; 161 if (argc > 0) 162 usage(); 163 164 if (conf.opts & BGPD_OPT_NOACTION) { 165 struct network_head net_l; 166 struct rdomain_head rdom_l; 167 struct filter_head rules_l; 168 169 if (parse_config(conffile, &conf, &mrt_l, &peer_l, &net_l, 170 &rules_l, &rdom_l)) 171 exit(1); 172 173 if (conf.opts & BGPD_OPT_VERBOSE) 174 print_config(&conf, &ribnames, &net_l, peer_l, &rules_l, 175 &mrt_l, &rdom_l); 176 else 177 fprintf(stderr, "configuration OK\n"); 178 exit(0); 179 } 180 181 if (geteuid()) 182 errx(1, "need root privileges"); 183 184 if (getpwnam(BGPD_USER) == NULL) 185 errx(1, "unknown user %s", BGPD_USER); 186 187 log_init(debug); 188 log_verbose(conf.opts & BGPD_OPT_VERBOSE); 189 190 if (!debug) 191 daemon(1, 0); 192 193 log_info("startup"); 194 195 if (socketpair(AF_UNIX, SOCK_STREAM, PF_UNSPEC, pipe_m2s) == -1) 196 fatal("socketpair"); 197 if (socketpair(AF_UNIX, SOCK_STREAM, PF_UNSPEC, pipe_m2r) == -1) 198 fatal("socketpair"); 199 if (socketpair(AF_UNIX, SOCK_STREAM, PF_UNSPEC, pipe_s2r) == -1) 200 fatal("socketpair"); 201 if (socketpair(AF_UNIX, SOCK_STREAM, PF_UNSPEC, pipe_s2r_c) == -1) 202 fatal("socketpair"); 203 session_socket_blockmode(pipe_m2s[0], BM_NONBLOCK); 204 session_socket_blockmode(pipe_m2s[1], BM_NONBLOCK); 205 session_socket_blockmode(pipe_m2r[0], BM_NONBLOCK); 206 session_socket_blockmode(pipe_m2r[1], BM_NONBLOCK); 207 session_socket_blockmode(pipe_s2r[0], BM_NONBLOCK); 208 session_socket_blockmode(pipe_s2r[1], BM_NONBLOCK); 209 session_socket_blockmode(pipe_s2r_c[0], BM_NONBLOCK); 210 session_socket_blockmode(pipe_s2r_c[1], BM_NONBLOCK); 211 212 /* fork children */ 213 rde_pid = rde_main(pipe_m2r, pipe_s2r, pipe_m2s, pipe_s2r_c, debug); 214 io_pid = session_main(pipe_m2s, pipe_s2r, pipe_m2r, pipe_s2r_c); 215 216 setproctitle("parent"); 217 218 signal(SIGTERM, sighdlr); 219 signal(SIGINT, sighdlr); 220 signal(SIGCHLD, sighdlr); 221 signal(SIGHUP, sighdlr); 222 signal(SIGALRM, sighdlr); 223 signal(SIGUSR1, sighdlr); 224 signal(SIGPIPE, SIG_IGN); 225 226 close(pipe_m2s[1]); 227 close(pipe_m2r[1]); 228 close(pipe_s2r[0]); 229 close(pipe_s2r[1]); 230 231 if ((ibuf_se = malloc(sizeof(struct imsgbuf))) == NULL || 232 (ibuf_rde = malloc(sizeof(struct imsgbuf))) == NULL) 233 fatal(NULL); 234 imsg_init(ibuf_se, pipe_m2s[0]); 235 imsg_init(ibuf_rde, pipe_m2r[0]); 236 mrt_init(ibuf_rde, ibuf_se); 237 if ((rfd = kr_init()) == -1) 238 quit = 1; 239 quit = reconfigure(conffile, &conf, &mrt_l, &peer_l); 240 if (pftable_clear_all() != 0) 241 quit = 1; 242 243 while (quit == 0) { 244 bzero(pfd, sizeof(pfd)); 245 pfd[PFD_PIPE_SESSION].fd = ibuf_se->fd; 246 pfd[PFD_PIPE_SESSION].events = POLLIN; 247 if (ibuf_se->w.queued) 248 pfd[PFD_PIPE_SESSION].events |= POLLOUT; 249 pfd[PFD_PIPE_ROUTE].fd = ibuf_rde->fd; 250 pfd[PFD_PIPE_ROUTE].events = POLLIN; 251 if (ibuf_rde->w.queued) 252 pfd[PFD_PIPE_ROUTE].events |= POLLOUT; 253 pfd[PFD_SOCK_ROUTE].fd = rfd; 254 pfd[PFD_SOCK_ROUTE].events = POLLIN; 255 256 timeout = mrt_timeout(&mrt_l); 257 if (timeout > MAX_TIMEOUT) 258 timeout = MAX_TIMEOUT; 259 260 if ((nfds = poll(pfd, POLL_MAX, timeout * 1000)) == -1) 261 if (errno != EINTR) { 262 log_warn("poll error"); 263 quit = 1; 264 } 265 266 if (nfds > 0 && pfd[PFD_PIPE_SESSION].revents & POLLOUT) 267 if (msgbuf_write(&ibuf_se->w) < 0) { 268 log_warn("pipe write error (to SE)"); 269 quit = 1; 270 } 271 272 if (nfds > 0 && pfd[PFD_PIPE_ROUTE].revents & POLLOUT) 273 if (msgbuf_write(&ibuf_rde->w) < 0) { 274 log_warn("pipe write error (to RDE)"); 275 quit = 1; 276 } 277 278 if (nfds > 0 && pfd[PFD_PIPE_SESSION].revents & POLLIN) { 279 if (dispatch_imsg(ibuf_se, PFD_PIPE_SESSION) == -1) 280 quit = 1; 281 } 282 283 if (nfds > 0 && pfd[PFD_PIPE_ROUTE].revents & POLLIN) { 284 if (dispatch_imsg(ibuf_rde, PFD_PIPE_ROUTE) == -1) 285 quit = 1; 286 } 287 288 if (nfds > 0 && pfd[PFD_SOCK_ROUTE].revents & POLLIN) { 289 if (kr_dispatch_msg() == -1) 290 quit = 1; 291 } 292 293 if (reconfig) { 294 u_int error; 295 296 reconfig = 0; 297 switch (reconfigure(conffile, &conf, &mrt_l, &peer_l)) { 298 case -1: /* fatal error */ 299 quit = 1; 300 break; 301 case 0: /* all OK */ 302 error = 0; 303 break; 304 case 2: 305 error = CTL_RES_PENDING; 306 break; 307 default: /* parse error */ 308 error = CTL_RES_PARSE_ERROR; 309 break; 310 } 311 if (reconfpid != 0) { 312 send_imsg_session(IMSG_CTL_RESULT, reconfpid, 313 &error, sizeof(error)); 314 reconfpid = 0; 315 } 316 } 317 318 if (sigchld) { 319 sigchld = 0; 320 if (check_child(io_pid, "session engine")) { 321 quit = 1; 322 io_pid = 0; 323 } 324 if (check_child(rde_pid, "route decision engine")) { 325 quit = 1; 326 rde_pid = 0; 327 } 328 } 329 330 if (mrtdump) { 331 mrtdump = 0; 332 mrt_handler(&mrt_l); 333 } 334 } 335 336 signal(SIGCHLD, SIG_IGN); 337 338 if (io_pid) 339 kill(io_pid, SIGTERM); 340 341 if (rde_pid) 342 kill(rde_pid, SIGTERM); 343 344 while ((p = peer_l) != NULL) { 345 peer_l = p->next; 346 free(p); 347 } 348 while ((m = LIST_FIRST(&mrt_l)) != NULL) { 349 LIST_REMOVE(m, entry); 350 free(m); 351 } 352 if (conf.listen_addrs) 353 while ((la = TAILQ_FIRST(conf.listen_addrs)) != NULL) { 354 TAILQ_REMOVE(conf.listen_addrs, la, entry); 355 close(la->fd); 356 free(la); 357 } 358 359 control_cleanup(conf.csock); 360 control_cleanup(conf.rcsock); 361 carp_demote_shutdown(); 362 kr_shutdown(); 363 pftable_clear_all(); 364 free(conf.listen_addrs); 365 366 do { 367 if ((pid = wait(NULL)) == -1 && 368 errno != EINTR && errno != ECHILD) 369 fatal("wait"); 370 } while (pid != -1 || (pid == -1 && errno == EINTR)); 371 372 msgbuf_clear(&ibuf_se->w); 373 free(ibuf_se); 374 msgbuf_clear(&ibuf_rde->w); 375 free(ibuf_rde); 376 free(rcname); 377 free(cname); 378 379 log_info("Terminating"); 380 return (0); 381} 382 383int 384check_child(pid_t pid, const char *pname) 385{ 386 int status; 387 388 if (waitpid(pid, &status, WNOHANG) > 0) { 389 if (WIFEXITED(status)) { 390 log_warnx("Lost child: %s exited", pname); 391 return (1); 392 } 393 if (WIFSIGNALED(status)) { 394 log_warnx("Lost child: %s terminated; signal %d", 395 pname, WTERMSIG(status)); 396 return (1); 397 } 398 } 399 400 return (0); 401} 402 403int 404send_filterset(struct imsgbuf *i, struct filter_set_head *set) 405{ 406 struct filter_set *s; 407 408 TAILQ_FOREACH(s, set, entry) 409 if (imsg_compose(i, IMSG_FILTER_SET, 0, 0, -1, s, 410 sizeof(struct filter_set)) == -1) 411 return (-1); 412 return (0); 413} 414 415int 416reconfigure(char *conffile, struct bgpd_config *conf, struct mrt_head *mrt_l, 417 struct peer **peer_l) 418{ 419 struct network_head net_l; 420 struct rdomain_head rdom_l; 421 struct filter_head rules_l; 422 struct peer *p; 423 struct filter_rule *r; 424 struct listen_addr *la; 425 struct rde_rib *rr; 426 struct rdomain *rd; 427 428 if (reconfpending) { 429 log_info("previous reload still running"); 430 return (2); 431 } 432 reconfpending = 2; /* one per child */ 433 434 log_info("rereading config"); 435 if (parse_config(conffile, conf, mrt_l, peer_l, &net_l, &rules_l, 436 &rdom_l)) { 437 log_warnx("config file %s has errors, not reloading", 438 conffile); 439 reconfpending = 0; 440 return (1); 441 } 442 443 cflags = conf->flags; 444 prepare_listeners(conf); 445 446 /* start reconfiguration */ 447 if (imsg_compose(ibuf_se, IMSG_RECONF_CONF, 0, 0, -1, 448 conf, sizeof(struct bgpd_config)) == -1) 449 return (-1); 450 if (imsg_compose(ibuf_rde, IMSG_RECONF_CONF, 0, 0, -1, 451 conf, sizeof(struct bgpd_config)) == -1) 452 return (-1); 453 454 TAILQ_FOREACH(la, conf->listen_addrs, entry) { 455 if (imsg_compose(ibuf_se, IMSG_RECONF_LISTENER, 0, 0, la->fd, 456 la, sizeof(struct listen_addr)) == -1) 457 return (-1); 458 la->fd = -1; 459 } 460 461 if (control_setup(conf) == -1) 462 return (-1); 463 464 /* adjust fib syncing on reload */ 465 ktable_preload(); 466 467 /* RIBs for the RDE */ 468 while ((rr = SIMPLEQ_FIRST(&ribnames))) { 469 SIMPLEQ_REMOVE_HEAD(&ribnames, entry); 470 if (ktable_update(rr->rtableid, rr->name, NULL, 471 rr->flags) == -1) { 472 log_warnx("failed to load rdomain %d", 473 rr->rtableid); 474 return (-1); 475 } 476 if (imsg_compose(ibuf_rde, IMSG_RECONF_RIB, 0, 0, -1, 477 rr, sizeof(struct rde_rib)) == -1) 478 return (-1); 479 free(rr); 480 } 481 482 /* send peer list and listeners to the SE and RDE */ 483 for (p = *peer_l; p != NULL; p = p->next) { 484 if (imsg_compose(ibuf_se, IMSG_RECONF_PEER, p->conf.id, 0, -1, 485 &p->conf, sizeof(struct peer_config)) == -1) 486 return (-1); 487 if (imsg_compose(ibuf_rde, IMSG_RECONF_PEER, p->conf.id, 0, -1, 488 &p->conf, sizeof(struct peer_config)) == -1) 489 return (-1); 490 } 491 492 /* networks go via kroute to the RDE */ 493 if (kr_net_reload(0, &net_l)) 494 return (-1); 495 496 /* filters for the RDE */ 497 while ((r = TAILQ_FIRST(&rules_l)) != NULL) { 498 TAILQ_REMOVE(&rules_l, r, entry); 499 if (imsg_compose(ibuf_rde, IMSG_RECONF_FILTER, 0, 0, -1, 500 r, sizeof(struct filter_rule)) == -1) 501 return (-1); 502 if (send_filterset(ibuf_rde, &r->set) == -1) 503 return (-1); 504 filterset_free(&r->set); 505 free(r); 506 } 507 508 while ((rd = SIMPLEQ_FIRST(&rdom_l)) != NULL) { 509 SIMPLEQ_REMOVE_HEAD(&rdom_l, entry); 510 if (ktable_update(rd->rtableid, rd->descr, rd->ifmpe, 511 rd->flags) == -1) { 512 log_warnx("failed to load rdomain %d", 513 rd->rtableid); 514 return (-1); 515 } 516 /* networks go via kroute to the RDE */ 517 if (kr_net_reload(rd->rtableid, &rd->net_l)) 518 return (-1); 519 520 if (imsg_compose(ibuf_rde, IMSG_RECONF_RDOMAIN, 0, 0, -1, 521 rd, sizeof(*rd)) == -1) 522 return (-1); 523 524 /* export targets */ 525 if (imsg_compose(ibuf_rde, IMSG_RECONF_RDOMAIN_EXPORT, 0, 0, 526 -1, NULL, 0) == -1) 527 return (-1); 528 if (send_filterset(ibuf_rde, &rd->export) == -1) 529 return (-1); 530 filterset_free(&rd->export); 531 532 /* import targets */ 533 if (imsg_compose(ibuf_rde, IMSG_RECONF_RDOMAIN_IMPORT, 0, 0, 534 -1, NULL, 0) == -1) 535 return (-1); 536 if (send_filterset(ibuf_rde, &rd->import) == -1) 537 return (-1); 538 filterset_free(&rd->import); 539 540 if (imsg_compose(ibuf_rde, IMSG_RECONF_RDOMAIN_DONE, 0, 0, 541 -1, NULL, 0) == -1) 542 return (-1); 543 544 free(rd); 545 } 546 547 /* signal both childs to replace their config */ 548 if (imsg_compose(ibuf_se, IMSG_RECONF_DONE, 0, 0, -1, NULL, 0) == -1 || 549 imsg_compose(ibuf_rde, IMSG_RECONF_DONE, 0, 0, -1, NULL, 0) == -1) 550 return (-1); 551 552 /* fix kroute information */ 553 ktable_postload(); 554 555 /* redistribute list needs to be reloaded too */ 556 if (kr_reload() == -1) 557 return (-1); 558 559 /* mrt changes can be sent out of bound */ 560 mrt_reconfigure(mrt_l); 561 return (0); 562} 563 564int 565dispatch_imsg(struct imsgbuf *ibuf, int idx) 566{ 567 struct imsg imsg; 568 ssize_t n; 569 int rv, verbose; 570 571 if ((n = imsg_read(ibuf)) == -1) 572 return (-1); 573 574 if (n == 0) { /* connection closed */ 575 log_warnx("dispatch_imsg in main: pipe closed"); 576 return (-1); 577 } 578 579 rv = 0; 580 for (;;) { 581 if ((n = imsg_get(ibuf, &imsg)) == -1) 582 return (-1); 583 584 if (n == 0) 585 break; 586 587 switch (imsg.hdr.type) { 588 case IMSG_KROUTE_CHANGE: 589 if (idx != PFD_PIPE_ROUTE) 590 log_warnx("route request not from RDE"); 591 else if (imsg.hdr.len != IMSG_HEADER_SIZE + 592 sizeof(struct kroute_full)) 593 log_warnx("wrong imsg len"); 594 else if (kr_change(imsg.hdr.peerid, imsg.data)) 595 rv = -1; 596 break; 597 case IMSG_KROUTE_DELETE: 598 if (idx != PFD_PIPE_ROUTE) 599 log_warnx("route request not from RDE"); 600 else if (imsg.hdr.len != IMSG_HEADER_SIZE + 601 sizeof(struct kroute_full)) 602 log_warnx("wrong imsg len"); 603 else if (kr_delete(imsg.hdr.peerid, imsg.data)) 604 rv = -1; 605 break; 606 case IMSG_NEXTHOP_ADD: 607 if (idx != PFD_PIPE_ROUTE) 608 log_warnx("nexthop request not from RDE"); 609 else if (imsg.hdr.len != IMSG_HEADER_SIZE + 610 sizeof(struct bgpd_addr)) 611 log_warnx("wrong imsg len"); 612 else if (kr_nexthop_add(imsg.hdr.peerid, imsg.data) == 613 -1) 614 rv = -1; 615 break; 616 case IMSG_NEXTHOP_REMOVE: 617 if (idx != PFD_PIPE_ROUTE) 618 log_warnx("nexthop request not from RDE"); 619 else if (imsg.hdr.len != IMSG_HEADER_SIZE + 620 sizeof(struct bgpd_addr)) 621 log_warnx("wrong imsg len"); 622 else 623 kr_nexthop_delete(imsg.hdr.peerid, imsg.data); 624 break; 625 case IMSG_PFTABLE_ADD: 626 if (idx != PFD_PIPE_ROUTE) 627 log_warnx("pftable request not from RDE"); 628 else 629 if (imsg.hdr.len != IMSG_HEADER_SIZE + 630 sizeof(struct pftable_msg)) 631 log_warnx("wrong imsg len"); 632 else if (pftable_addr_add(imsg.data) != 0) 633 rv = -1; 634 break; 635 case IMSG_PFTABLE_REMOVE: 636 if (idx != PFD_PIPE_ROUTE) 637 log_warnx("pftable request not from RDE"); 638 else 639 if (imsg.hdr.len != IMSG_HEADER_SIZE + 640 sizeof(struct pftable_msg)) 641 log_warnx("wrong imsg len"); 642 else if (pftable_addr_remove(imsg.data) != 0) 643 rv = -1; 644 break; 645 case IMSG_PFTABLE_COMMIT: 646 if (idx != PFD_PIPE_ROUTE) 647 log_warnx("pftable request not from RDE"); 648 else 649 if (imsg.hdr.len != IMSG_HEADER_SIZE) 650 log_warnx("wrong imsg len"); 651 else if (pftable_commit() != 0) 652 rv = -1; 653 break; 654 case IMSG_CTL_RELOAD: 655 if (idx != PFD_PIPE_SESSION) 656 log_warnx("reload request not from SE"); 657 else { 658 reconfig = 1; 659 reconfpid = imsg.hdr.pid; 660 } 661 break; 662 case IMSG_CTL_FIB_COUPLE: 663 if (idx != PFD_PIPE_SESSION) 664 log_warnx("couple request not from SE"); 665 else 666 kr_fib_couple(imsg.hdr.peerid); 667 break; 668 case IMSG_CTL_FIB_DECOUPLE: 669 if (idx != PFD_PIPE_SESSION) 670 log_warnx("decouple request not from SE"); 671 else 672 kr_fib_decouple(imsg.hdr.peerid); 673 break; 674 case IMSG_CTL_KROUTE: 675 case IMSG_CTL_KROUTE_ADDR: 676 case IMSG_CTL_SHOW_NEXTHOP: 677 case IMSG_CTL_SHOW_INTERFACE: 678 case IMSG_CTL_SHOW_FIB_TABLES: 679 if (idx != PFD_PIPE_SESSION) 680 log_warnx("kroute request not from SE"); 681 else 682 kr_show_route(&imsg); 683 break; 684 case IMSG_IFINFO: 685 if (idx != PFD_PIPE_SESSION) 686 log_warnx("IFINFO request not from SE"); 687 else if (imsg.hdr.len != IMSG_HEADER_SIZE + IFNAMSIZ) 688 log_warnx("IFINFO request with wrong len"); 689 else 690 kr_ifinfo(imsg.data); 691 break; 692 case IMSG_DEMOTE: 693 if (idx != PFD_PIPE_SESSION) 694 log_warnx("demote request not from SE"); 695 else if (imsg.hdr.len != IMSG_HEADER_SIZE + 696 sizeof(struct demote_msg)) 697 log_warnx("DEMOTE request with wrong len"); 698 else { 699 struct demote_msg *msg; 700 701 msg = imsg.data; 702 carp_demote_set(msg->demote_group, msg->level); 703 } 704 break; 705 case IMSG_CTL_LOG_VERBOSE: 706 /* already checked by SE */ 707 memcpy(&verbose, imsg.data, sizeof(verbose)); 708 log_verbose(verbose); 709 break; 710 case IMSG_RECONF_DONE: 711 if (reconfpending == 0) 712 log_warnx("unexpected RECONF_DONE received"); 713 reconfpending--; 714 break; 715 default: 716 break; 717 } 718 imsg_free(&imsg); 719 if (rv != 0) 720 return (rv); 721 } 722 return (0); 723} 724 725void 726send_nexthop_update(struct kroute_nexthop *msg) 727{ 728 char *gw = NULL; 729 730 if (msg->gateway.aid) 731 if (asprintf(&gw, ": via %s", 732 log_addr(&msg->gateway)) == -1) { 733 log_warn("send_nexthop_update"); 734 quit = 1; 735 } 736 737 log_info("nexthop %s now %s%s%s", log_addr(&msg->nexthop), 738 msg->valid ? "valid" : "invalid", 739 msg->connected ? ": directly connected" : "", 740 msg->gateway.aid ? gw : ""); 741 742 free(gw); 743 744 if (imsg_compose(ibuf_rde, IMSG_NEXTHOP_UPDATE, 0, 0, -1, 745 msg, sizeof(struct kroute_nexthop)) == -1) 746 quit = 1; 747} 748 749void 750send_imsg_session(int type, pid_t pid, void *data, u_int16_t datalen) 751{ 752 imsg_compose(ibuf_se, type, 0, pid, -1, data, datalen); 753} 754 755int 756send_network(int type, struct network_config *net, struct filter_set_head *h) 757{ 758 if (imsg_compose(ibuf_rde, type, 0, 0, -1, net, 759 sizeof(struct network_config)) == -1) 760 return (-1); 761 /* networks that get deleted don't need to send the filter set */ 762 if (type == IMSG_NETWORK_REMOVE) 763 return (0); 764 if (send_filterset(ibuf_rde, h) == -1) 765 return (-1); 766 if (imsg_compose(ibuf_rde, IMSG_NETWORK_DONE, 0, 0, -1, NULL, 0) == -1) 767 return (-1); 768 769 return (0); 770} 771 772int 773bgpd_filternexthop(struct kroute *kr, struct kroute6 *kr6) 774{ 775 /* kernel routes are never filtered */ 776 if (kr && kr->flags & F_KERNEL && kr->prefixlen != 0) 777 return (0); 778 if (kr6 && kr6->flags & F_KERNEL && kr6->prefixlen != 0) 779 return (0); 780 781 if (cflags & BGPD_FLAG_NEXTHOP_BGP) { 782 if (kr && kr->flags & F_BGPD_INSERTED) 783 return (0); 784 if (kr6 && kr6->flags & F_BGPD_INSERTED) 785 return (0); 786 } 787 788 if (cflags & BGPD_FLAG_NEXTHOP_DEFAULT) { 789 if (kr && kr->prefixlen == 0) 790 return (0); 791 if (kr6 && kr6->prefixlen == 0) 792 return (0); 793 } 794 795 return (1); 796} 797 798int 799control_setup(struct bgpd_config *conf) 800{ 801 int fd, restricted; 802 803 /* control socket is outside chroot */ 804 if (!cname || strcmp(cname, conf->csock)) { 805 if (cname) { 806 control_cleanup(cname); 807 free(cname); 808 } 809 if ((cname = strdup(conf->csock)) == NULL) 810 fatal("strdup"); 811 if ((fd = control_init(0, cname)) == -1) 812 fatalx("control socket setup failed"); 813 restricted = 0; 814 if (imsg_compose(ibuf_se, IMSG_RECONF_CTRL, 0, 0, fd, 815 &restricted, sizeof(restricted)) == -1) 816 return (-1); 817 } 818 if (!conf->rcsock) { 819 /* remove restricted socket */ 820 control_cleanup(rcname); 821 free(rcname); 822 rcname = NULL; 823 } else if (!rcname || strcmp(rcname, conf->rcsock)) { 824 if (rcname) { 825 control_cleanup(rcname); 826 free(rcname); 827 } 828 if ((rcname = strdup(conf->rcsock)) == NULL) 829 fatal("strdup"); 830 if ((fd = control_init(1, rcname)) == -1) 831 fatalx("control socket setup failed"); 832 restricted = 1; 833 if (imsg_compose(ibuf_se, IMSG_RECONF_CTRL, 0, 0, fd, 834 &restricted, sizeof(restricted)) == -1) 835 return (-1); 836 } 837 return (0); 838} 839