bgpd.c revision 1.138
1/* $OpenBSD: bgpd.c,v 1.138 2006/06/17 14:06:09 henning 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 "mrt.h" 36#include "bgpd.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 **, struct filter_head *); 46int dispatch_imsg(struct imsgbuf *, int); 47 48int rfd = -1; 49int cflags = 0; 50struct filter_set_head *connectset; 51struct filter_set_head *connectset6; 52struct filter_set_head *staticset; 53struct filter_set_head *staticset6; 54volatile sig_atomic_t mrtdump = 0; 55volatile sig_atomic_t quit = 0; 56volatile sig_atomic_t sigchld = 0; 57volatile sig_atomic_t reconfig = 0; 58pid_t reconfpid = 0; 59struct imsgbuf *ibuf_se; 60struct imsgbuf *ibuf_rde; 61 62void 63sighdlr(int sig) 64{ 65 switch (sig) { 66 case SIGTERM: 67 case SIGINT: 68 quit = 1; 69 break; 70 case SIGCHLD: 71 sigchld = 1; 72 break; 73 case SIGHUP: 74 reconfig = 1; 75 break; 76 case SIGALRM: 77 case SIGUSR1: 78 mrtdump = 1; 79 break; 80 } 81} 82 83__dead void 84usage(void) 85{ 86 extern char *__progname; 87 88 fprintf(stderr, "usage: %s [-dnv] ", __progname); 89 fprintf(stderr, "[-D macro=value] [-f file] [-r path] [-s path]\n"); 90 exit(1); 91} 92 93#define PFD_PIPE_SESSION 0 94#define PFD_PIPE_ROUTE 1 95#define PFD_SOCK_ROUTE 2 96#define POLL_MAX 3 97#define MAX_TIMEOUT 3600 98 99int 100main(int argc, char *argv[]) 101{ 102 struct bgpd_config conf; 103 struct peer *peer_l, *p; 104 struct mrt_head mrt_l; 105 struct network_head net_l; 106 struct filter_head *rules_l; 107 struct network *net; 108 struct filter_rule *r; 109 struct mrt *m; 110 struct listen_addr *la; 111 struct pollfd pfd[POLL_MAX]; 112 pid_t io_pid = 0, rde_pid = 0, pid; 113 char *conffile; 114 int debug = 0; 115 int ch, timeout, nfds; 116 int pipe_m2s[2]; 117 int pipe_m2r[2]; 118 int pipe_s2r[2]; 119 120 conffile = CONFFILE; 121 bgpd_process = PROC_MAIN; 122 123 log_init(1); /* log to stderr until daemonized */ 124 125 if ((rules_l = calloc(1, sizeof(struct filter_head))) == NULL) 126 err(1, NULL); 127 128 bzero(&conf, sizeof(conf)); 129 LIST_INIT(&mrt_l); 130 TAILQ_INIT(&net_l); 131 TAILQ_INIT(rules_l); 132 peer_l = NULL; 133 conf.csock = SOCKET_NAME; 134 135 while ((ch = getopt(argc, argv, "cdD:f:nr:s:v")) != -1) { 136 switch (ch) { 137 case 'c': 138 conf.opts |= BGPD_OPT_FORCE_DEMOTE; 139 break; 140 case 'd': 141 debug = 1; 142 break; 143 case 'D': 144 if (cmdline_symset(optarg) < 0) 145 log_warnx("could not parse macro definition %s", 146 optarg); 147 break; 148 case 'f': 149 conffile = optarg; 150 break; 151 case 'n': 152 conf.opts |= BGPD_OPT_NOACTION; 153 break; 154 case 'v': 155 if (conf.opts & BGPD_OPT_VERBOSE) 156 conf.opts |= BGPD_OPT_VERBOSE2; 157 conf.opts |= BGPD_OPT_VERBOSE; 158 break; 159 case 'r': 160 conf.rcsock = optarg; 161 break; 162 case 's': 163 conf.csock = optarg; 164 break; 165 default: 166 usage(); 167 /* NOTREACHED */ 168 } 169 } 170 171 if (parse_config(conffile, &conf, &mrt_l, &peer_l, &net_l, rules_l)) { 172 free(rules_l); 173 exit(1); 174 } 175 176 if (conf.opts & BGPD_OPT_NOACTION) { 177 if (conf.opts & BGPD_OPT_VERBOSE) 178 print_config(&conf, &net_l, peer_l, rules_l, &mrt_l); 179 else 180 fprintf(stderr, "configuration OK\n"); 181 exit(0); 182 } 183 cflags = conf.flags; 184 connectset = &conf.connectset; 185 staticset = &conf.staticset; 186 connectset6 = &conf.connectset6; 187 staticset6 = &conf.staticset6; 188 189 if (geteuid()) 190 errx(1, "need root privileges"); 191 192 if (getpwnam(BGPD_USER) == NULL) 193 errx(1, "unknown user %s", BGPD_USER); 194 195 log_init(debug); 196 197 if (!debug) 198 daemon(1, 0); 199 200 log_info("startup"); 201 202 if (socketpair(AF_UNIX, SOCK_STREAM, PF_UNSPEC, pipe_m2s) == -1) 203 fatal("socketpair"); 204 if (socketpair(AF_UNIX, SOCK_STREAM, PF_UNSPEC, pipe_m2r) == -1) 205 fatal("socketpair"); 206 if (socketpair(AF_UNIX, SOCK_STREAM, PF_UNSPEC, pipe_s2r) == -1) 207 fatal("socketpair"); 208 session_socket_blockmode(pipe_m2s[0], BM_NONBLOCK); 209 session_socket_blockmode(pipe_m2s[1], BM_NONBLOCK); 210 session_socket_blockmode(pipe_m2r[0], BM_NONBLOCK); 211 session_socket_blockmode(pipe_m2r[1], BM_NONBLOCK); 212 session_socket_blockmode(pipe_s2r[0], BM_NONBLOCK); 213 session_socket_blockmode(pipe_s2r[1], BM_NONBLOCK); 214 215 prepare_listeners(&conf); 216 217 /* fork children */ 218 rde_pid = rde_main(&conf, peer_l, &net_l, rules_l, &mrt_l, 219 pipe_m2r, pipe_s2r, pipe_m2s); 220 io_pid = session_main(&conf, peer_l, &net_l, rules_l, &mrt_l, 221 pipe_m2s, pipe_s2r, pipe_m2r); 222 223 setproctitle("parent"); 224 225 signal(SIGTERM, sighdlr); 226 signal(SIGINT, sighdlr); 227 signal(SIGCHLD, sighdlr); 228 signal(SIGHUP, sighdlr); 229 signal(SIGALRM, sighdlr); 230 signal(SIGUSR1, sighdlr); 231 232 close(pipe_m2s[1]); 233 close(pipe_m2r[1]); 234 close(pipe_s2r[0]); 235 close(pipe_s2r[1]); 236 237 if ((ibuf_se = malloc(sizeof(struct imsgbuf))) == NULL || 238 (ibuf_rde = malloc(sizeof(struct imsgbuf))) == NULL) 239 fatal(NULL); 240 imsg_init(ibuf_se, pipe_m2s[0]); 241 imsg_init(ibuf_rde, pipe_m2r[0]); 242 mrt_init(ibuf_rde, ibuf_se); 243 if ((rfd = kr_init(!(conf.flags & BGPD_FLAG_NO_FIB_UPDATE))) == -1) 244 quit = 1; 245 if (pftable_clear_all() != 0) 246 quit = 1; 247 248 while ((net = TAILQ_FIRST(&net_l)) != NULL) { 249 TAILQ_REMOVE(&net_l, net, entry); 250 filterset_free(&net->net.attrset); 251 free(net); 252 } 253 254 while ((r = TAILQ_FIRST(rules_l)) != NULL) { 255 TAILQ_REMOVE(rules_l, r, entry); 256 free(r); 257 } 258 TAILQ_FOREACH(la, conf.listen_addrs, entry) { 259 close(la->fd); 260 la->fd = -1; 261 } 262 263 mrt_reconfigure(&mrt_l); 264 265 while (quit == 0) { 266 bzero(pfd, sizeof(pfd)); 267 pfd[PFD_PIPE_SESSION].fd = ibuf_se->fd; 268 pfd[PFD_PIPE_SESSION].events = POLLIN; 269 if (ibuf_se->w.queued) 270 pfd[PFD_PIPE_SESSION].events |= POLLOUT; 271 pfd[PFD_PIPE_ROUTE].fd = ibuf_rde->fd; 272 pfd[PFD_PIPE_ROUTE].events = POLLIN; 273 if (ibuf_rde->w.queued) 274 pfd[PFD_PIPE_ROUTE].events |= POLLOUT; 275 pfd[PFD_SOCK_ROUTE].fd = rfd; 276 pfd[PFD_SOCK_ROUTE].events = POLLIN; 277 278 timeout = mrt_timeout(&mrt_l); 279 if (timeout > MAX_TIMEOUT) 280 timeout = MAX_TIMEOUT; 281 282 if ((nfds = poll(pfd, POLL_MAX, timeout * 1000)) == -1) 283 if (errno != EINTR) { 284 log_warn("poll error"); 285 quit = 1; 286 } 287 288 if (nfds > 0 && pfd[PFD_PIPE_SESSION].revents & POLLOUT) 289 if (msgbuf_write(&ibuf_se->w) < 0) { 290 log_warn("pipe write error (to SE)"); 291 quit = 1; 292 } 293 294 if (nfds > 0 && pfd[PFD_PIPE_ROUTE].revents & POLLOUT) 295 if (msgbuf_write(&ibuf_rde->w) < 0) { 296 log_warn("pipe write error (to RDE)"); 297 quit = 1; 298 } 299 300 if (nfds > 0 && pfd[PFD_PIPE_SESSION].revents & POLLIN) { 301 if (dispatch_imsg(ibuf_se, PFD_PIPE_SESSION) == -1) 302 quit = 1; 303 } 304 305 if (nfds > 0 && pfd[PFD_PIPE_ROUTE].revents & POLLIN) { 306 if (dispatch_imsg(ibuf_rde, PFD_PIPE_ROUTE) == -1) 307 quit = 1; 308 } 309 310 if (nfds > 0 && pfd[PFD_SOCK_ROUTE].revents & POLLIN) { 311 if (kr_dispatch_msg() == -1) 312 quit = 1; 313 } 314 315 if (reconfig) { 316 u_int error; 317 318 reconfig = 0; 319 log_info("rereading config"); 320 switch (reconfigure(conffile, &conf, &mrt_l, &peer_l, 321 rules_l)) { 322 case -1: /* fatal error */ 323 quit = 1; 324 break; 325 case 0: /* all OK */ 326 error = 0; 327 break; 328 default: /* parse error */ 329 error = CTL_RES_PARSE_ERROR; 330 break; 331 } 332 if (reconfpid != 0) { 333 send_imsg_session(IMSG_CTL_RESULT, reconfpid, 334 &error, sizeof(error)); 335 reconfpid = 0; 336 } 337 } 338 339 if (sigchld) { 340 sigchld = 0; 341 if (check_child(io_pid, "session engine")) { 342 quit = 1; 343 io_pid = 0; 344 } 345 if (check_child(rde_pid, "route decision engine")) { 346 quit = 1; 347 rde_pid = 0; 348 } 349 } 350 351 if (mrtdump) { 352 mrtdump = 0; 353 mrt_handler(&mrt_l); 354 } 355 } 356 357 signal(SIGCHLD, SIG_IGN); 358 359 if (io_pid) 360 kill(io_pid, SIGTERM); 361 362 if (rde_pid) 363 kill(rde_pid, SIGTERM); 364 365 while ((p = peer_l) != NULL) { 366 peer_l = p->next; 367 free(p); 368 } 369 while ((m = LIST_FIRST(&mrt_l)) != NULL) { 370 LIST_REMOVE(m, entry); 371 free(m); 372 } 373 while ((la = TAILQ_FIRST(conf.listen_addrs)) != NULL) { 374 TAILQ_REMOVE(conf.listen_addrs, la, entry); 375 close(la->fd); 376 free(la); 377 } 378 379 free(rules_l); 380 control_cleanup(conf.csock); 381 control_cleanup(conf.rcsock); 382 carp_demote_shutdown(); 383 kr_shutdown(); 384 pftable_clear_all(); 385 free(conf.listen_addrs); 386 387 do { 388 if ((pid = wait(NULL)) == -1 && 389 errno != EINTR && errno != ECHILD) 390 fatal("wait"); 391 } while (pid != -1 || (pid == -1 && errno == EINTR)); 392 393 msgbuf_clear(&ibuf_se->w); 394 free(ibuf_se); 395 msgbuf_clear(&ibuf_rde->w); 396 free(ibuf_rde); 397 398 log_info("Terminating"); 399 return (0); 400} 401 402int 403check_child(pid_t pid, const char *pname) 404{ 405 int status; 406 407 if (waitpid(pid, &status, WNOHANG) > 0) { 408 if (WIFEXITED(status)) { 409 log_warnx("Lost child: %s exited", pname); 410 return (1); 411 } 412 if (WIFSIGNALED(status)) { 413 log_warnx("Lost child: %s terminated; signal %d", 414 pname, WTERMSIG(status)); 415 return (1); 416 } 417 } 418 419 return (0); 420} 421 422int 423send_filterset(struct imsgbuf *i, struct filter_set_head *set) 424{ 425 struct filter_set *s; 426 427 TAILQ_FOREACH(s, set, entry) 428 if (imsg_compose(i, IMSG_FILTER_SET, 0, 0, -1, s, 429 sizeof(struct filter_set)) == -1) 430 return (-1); 431 return (0); 432} 433 434int 435reconfigure(char *conffile, struct bgpd_config *conf, struct mrt_head *mrt_l, 436 struct peer **peer_l, struct filter_head *rules_l) 437{ 438 struct network_head net_l; 439 struct network *n; 440 struct peer *p; 441 struct filter_rule *r; 442 struct listen_addr *la; 443 444 if (parse_config(conffile, conf, mrt_l, peer_l, &net_l, rules_l)) { 445 log_warnx("config file %s has errors, not reloading", 446 conffile); 447 return (1); 448 } 449 450 cflags = conf->flags; 451 connectset = &conf->connectset; 452 staticset = &conf->staticset; 453 connectset6 = &conf->connectset6; 454 staticset6 = &conf->staticset6; 455 456 prepare_listeners(conf); 457 458 /* start reconfiguration */ 459 if (imsg_compose(ibuf_se, IMSG_RECONF_CONF, 0, 0, -1, 460 conf, sizeof(struct bgpd_config)) == -1) 461 return (-1); 462 if (imsg_compose(ibuf_rde, IMSG_RECONF_CONF, 0, 0, -1, 463 conf, sizeof(struct bgpd_config)) == -1) 464 return (-1); 465 466 /* send peer list and listeners to the SE */ 467 for (p = *peer_l; p != NULL; p = p->next) 468 if (imsg_compose(ibuf_se, IMSG_RECONF_PEER, p->conf.id, 0, -1, 469 &p->conf, sizeof(struct peer_config)) == -1) 470 return (-1); 471 472 TAILQ_FOREACH(la, conf->listen_addrs, entry) { 473 if (imsg_compose(ibuf_se, IMSG_RECONF_LISTENER, 0, 0, la->fd, 474 la, sizeof(struct listen_addr)) == -1) 475 return (-1); 476 la->fd = -1; 477 } 478 479 /* networks for the RDE */ 480 while ((n = TAILQ_FIRST(&net_l)) != NULL) { 481 if (imsg_compose(ibuf_rde, IMSG_NETWORK_ADD, 0, 0, -1, 482 &n->net, sizeof(struct network_config)) == -1) 483 return (-1); 484 if (send_filterset(ibuf_rde, &n->net.attrset) == -1) 485 return (-1); 486 if (imsg_compose(ibuf_rde, IMSG_NETWORK_DONE, 0, 0, -1, 487 NULL, 0) == -1) 488 return (-1); 489 TAILQ_REMOVE(&net_l, n, entry); 490 filterset_free(&n->net.attrset); 491 free(n); 492 } 493 494 /* redistribute list needs to be reloaded too */ 495 if (kr_reload() == -1) 496 return (-1); 497 498 /* filters for the RDE */ 499 while ((r = TAILQ_FIRST(rules_l)) != NULL) { 500 if (imsg_compose(ibuf_rde, IMSG_RECONF_FILTER, 0, 0, -1, 501 r, sizeof(struct filter_rule)) == -1) 502 return (-1); 503 if (send_filterset(ibuf_rde, &r->set) == -1) 504 return (-1); 505 TAILQ_REMOVE(rules_l, r, entry); 506 filterset_free(&r->set); 507 free(r); 508 } 509 510 /* singal both childs to replace their config */ 511 if (imsg_compose(ibuf_se, IMSG_RECONF_DONE, 0, 0, -1, NULL, 0) == -1 || 512 imsg_compose(ibuf_rde, IMSG_RECONF_DONE, 0, 0, -1, NULL, 0) == -1) 513 return (-1); 514 515 /* mrt changes can be sent out of bound */ 516 mrt_reconfigure(mrt_l); 517 return (0); 518} 519 520int 521dispatch_imsg(struct imsgbuf *ibuf, int idx) 522{ 523 struct imsg imsg; 524 int n; 525 int rv; 526 527 if ((n = imsg_read(ibuf)) == -1) 528 return (-1); 529 530 if (n == 0) { /* connection closed */ 531 log_warnx("dispatch_imsg in main: pipe closed"); 532 return (-1); 533 } 534 535 rv = 0; 536 for (;;) { 537 if ((n = imsg_get(ibuf, &imsg)) == -1) 538 return (-1); 539 540 if (n == 0) 541 break; 542 543 switch (imsg.hdr.type) { 544 case IMSG_KROUTE_CHANGE: 545 if (idx != PFD_PIPE_ROUTE) 546 log_warnx("route request not from RDE"); 547 else if (kr_change(imsg.data)) 548 rv = -1; 549 break; 550 case IMSG_KROUTE_DELETE: 551 if (idx != PFD_PIPE_ROUTE) 552 log_warnx("route request not from RDE"); 553 else if (kr_delete(imsg.data)) 554 rv = -1; 555 break; 556 case IMSG_KROUTE6_CHANGE: 557 if (idx != PFD_PIPE_ROUTE) 558 log_warnx("route request not from RDE"); 559 else if (kr6_change(imsg.data)) 560 rv = -1; 561 break; 562 case IMSG_KROUTE6_DELETE: 563 if (idx != PFD_PIPE_ROUTE) 564 log_warnx("route request not from RDE"); 565 else if (kr6_delete(imsg.data)) 566 rv = -1; 567 break; 568 case IMSG_NEXTHOP_ADD: 569 if (idx != PFD_PIPE_ROUTE) 570 log_warnx("nexthop request not from RDE"); 571 else 572 if (imsg.hdr.len != IMSG_HEADER_SIZE + 573 sizeof(struct bgpd_addr)) 574 log_warnx("wrong imsg len"); 575 else if (kr_nexthop_add(imsg.data) == -1) 576 rv = -1; 577 break; 578 case IMSG_NEXTHOP_REMOVE: 579 if (idx != PFD_PIPE_ROUTE) 580 log_warnx("nexthop request not from RDE"); 581 else 582 if (imsg.hdr.len != IMSG_HEADER_SIZE + 583 sizeof(struct bgpd_addr)) 584 log_warnx("wrong imsg len"); 585 else 586 kr_nexthop_delete(imsg.data); 587 break; 588 case IMSG_PFTABLE_ADD: 589 if (idx != PFD_PIPE_ROUTE) 590 log_warnx("pftable request not from RDE"); 591 else 592 if (imsg.hdr.len != IMSG_HEADER_SIZE + 593 sizeof(struct pftable_msg)) 594 log_warnx("wrong imsg len"); 595 else if (pftable_addr_add(imsg.data) != 0) 596 rv = -1; 597 break; 598 case IMSG_PFTABLE_REMOVE: 599 if (idx != PFD_PIPE_ROUTE) 600 log_warnx("pftable request not from RDE"); 601 else 602 if (imsg.hdr.len != IMSG_HEADER_SIZE + 603 sizeof(struct pftable_msg)) 604 log_warnx("wrong imsg len"); 605 else if (pftable_addr_remove(imsg.data) != 0) 606 rv = -1; 607 break; 608 case IMSG_PFTABLE_COMMIT: 609 if (idx != PFD_PIPE_ROUTE) 610 log_warnx("pftable request not from RDE"); 611 else 612 if (imsg.hdr.len != IMSG_HEADER_SIZE) 613 log_warnx("wrong imsg len"); 614 else if (pftable_commit() != 0) 615 rv = -1; 616 break; 617 case IMSG_CTL_RELOAD: 618 if (idx != PFD_PIPE_SESSION) 619 log_warnx("reload request not from SE"); 620 else 621 reconfig = 1; 622 reconfpid = imsg.hdr.pid; 623 break; 624 case IMSG_CTL_FIB_COUPLE: 625 if (idx != PFD_PIPE_SESSION) 626 log_warnx("couple request not from SE"); 627 else 628 kr_fib_couple(); 629 break; 630 case IMSG_CTL_FIB_DECOUPLE: 631 if (idx != PFD_PIPE_SESSION) 632 log_warnx("decouple request not from SE"); 633 else 634 kr_fib_decouple(); 635 break; 636 case IMSG_CTL_KROUTE: 637 case IMSG_CTL_KROUTE_ADDR: 638 case IMSG_CTL_SHOW_NEXTHOP: 639 case IMSG_CTL_SHOW_INTERFACE: 640 if (idx != PFD_PIPE_SESSION) 641 log_warnx("kroute request not from SE"); 642 else 643 kr_show_route(&imsg); 644 break; 645 case IMSG_IFINFO: 646 if (idx != PFD_PIPE_SESSION) 647 log_warnx("IFINFO request not from SE"); 648 else if (imsg.hdr.len != IMSG_HEADER_SIZE + IFNAMSIZ) 649 log_warnx("IFINFO request with wrong len"); 650 else 651 kr_ifinfo(imsg.data); 652 break; 653 case IMSG_DEMOTE: 654 if (idx != PFD_PIPE_SESSION) 655 log_warnx("demote request not from SE"); 656 else if (imsg.hdr.len != IMSG_HEADER_SIZE + 657 sizeof(struct demote_msg)) 658 log_warnx("DEMOTE request with wrong len"); 659 else { 660 struct demote_msg *msg; 661 662 msg = imsg.data; 663 carp_demote_set(msg->demote_group, msg->level); 664 } 665 break; 666 default: 667 break; 668 } 669 imsg_free(&imsg); 670 if (rv != 0) 671 return (rv); 672 } 673 return (0); 674} 675 676void 677send_nexthop_update(struct kroute_nexthop *msg) 678{ 679 char *gw = NULL; 680 681 if (msg->gateway.af) 682 if (asprintf(&gw, ": via %s", 683 log_addr(&msg->gateway)) == -1) { 684 log_warn("send_nexthop_update"); 685 quit = 1; 686 } 687 688 log_info("nexthop %s now %s%s%s", log_addr(&msg->nexthop), 689 msg->valid ? "valid" : "invalid", 690 msg->connected ? ": directly connected" : "", 691 msg->gateway.af ? gw : ""); 692 693 free(gw); 694 695 if (imsg_compose(ibuf_rde, IMSG_NEXTHOP_UPDATE, 0, 0, -1, 696 msg, sizeof(struct kroute_nexthop)) == -1) 697 quit = 1; 698} 699 700void 701send_imsg_session(int type, pid_t pid, void *data, u_int16_t datalen) 702{ 703 imsg_compose(ibuf_se, type, 0, pid, -1, data, datalen); 704} 705 706int 707bgpd_redistribute(int type, struct kroute *kr, struct kroute6 *kr6) 708{ 709 struct network_config net; 710 struct filter_set_head *h; 711 712 if ((cflags & BGPD_FLAG_REDIST_CONNECTED) && kr && 713 (kr->flags & F_CONNECTED)) 714 h = connectset; 715 else if ((cflags & BGPD_FLAG_REDIST_STATIC) && kr && 716 (kr->flags & F_STATIC)) 717 h = staticset; 718 else if ((cflags & BGPD_FLAG_REDIST6_CONNECTED) && kr6 && 719 (kr6->flags & F_CONNECTED)) 720 h = connectset6; 721 else if ((cflags & BGPD_FLAG_REDIST6_STATIC) && kr6 && 722 (kr6->flags & F_STATIC)) 723 h = staticset6; 724 else 725 return (0); 726 727 bzero(&net, sizeof(net)); 728 if (kr && kr6) 729 fatalx("bgpd_redistribute: unable to redistribute v4 and v6" 730 "together"); 731 if (kr != NULL) { 732 net.prefix.af = AF_INET; 733 net.prefix.v4.s_addr = kr->prefix.s_addr; 734 net.prefixlen = kr->prefixlen; 735 } 736 if (kr6 != NULL) { 737 net.prefix.af = AF_INET6; 738 memcpy(&net.prefix.v6, &kr6->prefix, sizeof(struct in6_addr)); 739 net.prefixlen = kr6->prefixlen; 740 } 741 742 743 if (imsg_compose(ibuf_rde, type, 0, 0, -1, &net, 744 sizeof(struct network_config)) == -1) 745 return (-1); 746 747 /* networks that get deleted don't need to send the filter set */ 748 if (type == IMSG_NETWORK_REMOVE) 749 return (1); 750 751 if (send_filterset(ibuf_rde, h) == -1) 752 return (-1); 753 if (imsg_compose(ibuf_rde, IMSG_NETWORK_DONE, 0, 0, -1, NULL, 0) == -1) 754 return (-1); 755 756 return (1); 757} 758 759int 760bgpd_filternexthop(struct kroute *kr, struct kroute6 *kr6) 761{ 762 /* kernel routes are never filtered */ 763 if (kr && kr->flags & F_KERNEL && kr->prefixlen != 0) 764 return (0); 765 if (kr6 && kr6->flags & F_KERNEL && kr6->prefixlen != 0) 766 return (0); 767 768 if (cflags & BGPD_FLAG_NEXTHOP_BGP) { 769 if (kr && kr->flags & F_BGPD_INSERTED) 770 return (0); 771 if (kr6 && kr6->flags & F_BGPD_INSERTED) 772 return (0); 773 } 774 775 if (cflags & BGPD_FLAG_NEXTHOP_DEFAULT) { 776 if (kr && kr->prefixlen == 0) 777 return (0); 778 if (kr6 && kr6->prefixlen == 0) 779 return (0); 780 } 781 782 return (1); 783} 784