| File: | src/usr.sbin/bgpd/bgpd.c |
| Warning: | line 192, column 2 Value stored to 'argv' is never read |
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| 1 | /* $OpenBSD: bgpd.c,v 1.239 2021/07/20 12:07:46 claudio 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(*__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 <syslog.h> |
| 34 | #include <unistd.h> |
| 35 | |
| 36 | #include "bgpd.h" |
| 37 | #include "session.h" |
| 38 | #include "log.h" |
| 39 | #include "version.h" |
| 40 | |
| 41 | void sighdlr(int); |
| 42 | __dead__attribute__((__noreturn__)) void usage(void); |
| 43 | int main(int, char *[]); |
| 44 | pid_t start_child(enum bgpd_process, char *, int, int, int); |
| 45 | int send_filterset(struct imsgbuf *, struct filter_set_head *); |
| 46 | int reconfigure(char *, struct bgpd_config *); |
| 47 | int send_config(struct bgpd_config *); |
| 48 | int dispatch_imsg(struct imsgbuf *, int, struct bgpd_config *); |
| 49 | int control_setup(struct bgpd_config *); |
| 50 | static void getsockpair(int [2]); |
| 51 | int imsg_send_sockets(struct imsgbuf *, struct imsgbuf *, |
| 52 | struct imsgbuf *); |
| 53 | void bgpd_rtr_connect(struct rtr_config *); |
| 54 | void bgpd_rtr_connect_done(int, struct bgpd_config *); |
| 55 | |
| 56 | int cflags; |
| 57 | volatile sig_atomic_t mrtdump; |
| 58 | volatile sig_atomic_t quit; |
| 59 | volatile sig_atomic_t reconfig; |
| 60 | pid_t reconfpid; |
| 61 | int reconfpending; |
| 62 | struct imsgbuf *ibuf_se; |
| 63 | struct imsgbuf *ibuf_rde; |
| 64 | struct imsgbuf *ibuf_rtr; |
| 65 | struct rib_names ribnames = SIMPLEQ_HEAD_INITIALIZER(ribnames){ ((void *)0), &(ribnames).sqh_first }; |
| 66 | char *cname; |
| 67 | char *rcname; |
| 68 | |
| 69 | struct connect_elm { |
| 70 | TAILQ_ENTRY(connect_elm)struct { struct connect_elm *tqe_next; struct connect_elm **tqe_prev ; } entry; |
| 71 | u_int32_t id; |
| 72 | int fd; |
| 73 | }; |
| 74 | |
| 75 | TAILQ_HEAD( ,connect_elm)struct { struct connect_elm *tqh_first; struct connect_elm ** tqh_last; } connect_queue = \ |
| 76 | TAILQ_HEAD_INITIALIZER(connect_queue){ ((void *)0), &(connect_queue).tqh_first }; |
| 77 | u_int connect_cnt; |
| 78 | #define MAX_CONNECT_CNT32 32 |
| 79 | |
| 80 | void |
| 81 | sighdlr(int sig) |
| 82 | { |
| 83 | switch (sig) { |
| 84 | case SIGTERM15: |
| 85 | case SIGINT2: |
| 86 | quit = 1; |
| 87 | break; |
| 88 | case SIGHUP1: |
| 89 | reconfig = 1; |
| 90 | break; |
| 91 | case SIGALRM14: |
| 92 | case SIGUSR130: |
| 93 | mrtdump = 1; |
| 94 | break; |
| 95 | } |
| 96 | } |
| 97 | |
| 98 | __dead__attribute__((__noreturn__)) void |
| 99 | usage(void) |
| 100 | { |
| 101 | extern char *__progname; |
| 102 | |
| 103 | fprintf(stderr(&__sF[2]), "usage: %s [-cdnvV] [-D macro=value] [-f file]\n", |
| 104 | __progname); |
| 105 | exit(1); |
| 106 | } |
| 107 | |
| 108 | #define PFD_PIPE_SESSION0 0 |
| 109 | #define PFD_PIPE_RDE1 1 |
| 110 | #define PFD_PIPE_RTR2 2 |
| 111 | #define PFD_SOCK_ROUTE3 3 |
| 112 | #define PFD_SOCK_PFKEY4 4 |
| 113 | #define PFD_CONNECT_START5 5 |
| 114 | #define MAX_TIMEOUT3600 3600 |
| 115 | |
| 116 | int cmd_opts; |
| 117 | |
| 118 | int |
| 119 | main(int argc, char *argv[]) |
| 120 | { |
| 121 | struct bgpd_config *conf; |
| 122 | enum bgpd_process proc = PROC_MAIN; |
| 123 | struct rde_rib *rr; |
| 124 | struct peer *p; |
| 125 | struct pollfd *pfd = NULL((void *)0); |
| 126 | struct connect_elm *ce; |
| 127 | time_t timeout; |
| 128 | pid_t se_pid = 0, rde_pid = 0, rtr_pid = 0, pid; |
| 129 | char *conffile; |
| 130 | char *saved_argv0; |
| 131 | u_int pfd_elms = 0, npfd, i; |
| 132 | int debug = 0; |
| 133 | int rfd, keyfd; |
| 134 | int ch, status; |
| 135 | int pipe_m2s[2]; |
| 136 | int pipe_m2r[2]; |
| 137 | int pipe_m2roa[2]; |
| 138 | |
| 139 | conffile = CONFFILE"/etc/bgpd.conf"; |
| 140 | |
| 141 | log_init(1, LOG_DAEMON(3<<3)); /* log to stderr until daemonized */ |
| 142 | log_procinit(log_procnames[PROC_MAIN]); |
| 143 | log_setverbose(1); |
| 144 | |
| 145 | saved_argv0 = argv[0]; |
| 146 | if (saved_argv0 == NULL((void *)0)) |
| 147 | saved_argv0 = "bgpd"; |
| 148 | |
| 149 | while ((ch = getopt(argc, argv, "cdD:f:nRSTvV")) != -1) { |
| 150 | switch (ch) { |
| 151 | case 'c': |
| 152 | cmd_opts |= BGPD_OPT_FORCE_DEMOTE0x0008; |
| 153 | break; |
| 154 | case 'd': |
| 155 | debug = 1; |
| 156 | break; |
| 157 | case 'D': |
| 158 | if (cmdline_symset(optarg) < 0) |
| 159 | log_warnx("could not parse macro definition %s", |
| 160 | optarg); |
| 161 | break; |
| 162 | case 'f': |
| 163 | conffile = optarg; |
| 164 | break; |
| 165 | case 'n': |
| 166 | cmd_opts |= BGPD_OPT_NOACTION0x0004; |
| 167 | break; |
| 168 | case 'v': |
| 169 | if (cmd_opts & BGPD_OPT_VERBOSE0x0001) |
| 170 | cmd_opts |= BGPD_OPT_VERBOSE20x0002; |
| 171 | cmd_opts |= BGPD_OPT_VERBOSE0x0001; |
| 172 | break; |
| 173 | case 'R': |
| 174 | proc = PROC_RDE; |
| 175 | break; |
| 176 | case 'S': |
| 177 | proc = PROC_SE; |
| 178 | break; |
| 179 | case 'T': |
| 180 | proc = PROC_RTR; |
| 181 | break; |
| 182 | case 'V': |
| 183 | fprintf(stderr(&__sF[2]), "OpenBGPD %s\n", BGPD_VERSION"7.2"); |
| 184 | return 0; |
| 185 | default: |
| 186 | usage(); |
| 187 | /* NOTREACHED */ |
| 188 | } |
| 189 | } |
| 190 | |
| 191 | argc -= optind; |
| 192 | argv += optind; |
Value stored to 'argv' is never read | |
| 193 | if (argc > 0) |
| 194 | usage(); |
| 195 | |
| 196 | if (cmd_opts & BGPD_OPT_NOACTION0x0004) { |
| 197 | if ((conf = parse_config(conffile, NULL((void *)0), NULL((void *)0))) == NULL((void *)0)) |
| 198 | exit(1); |
| 199 | |
| 200 | if (cmd_opts & BGPD_OPT_VERBOSE0x0001) |
| 201 | print_config(conf, &ribnames); |
| 202 | else |
| 203 | fprintf(stderr(&__sF[2]), "configuration OK\n"); |
| 204 | |
| 205 | while ((rr = SIMPLEQ_FIRST(&ribnames)((&ribnames)->sqh_first)) != NULL((void *)0)) { |
| 206 | SIMPLEQ_REMOVE_HEAD(&ribnames, entry)do { if (((&ribnames)->sqh_first = (&ribnames)-> sqh_first->entry.sqe_next) == ((void *)0)) (&ribnames) ->sqh_last = &(&ribnames)->sqh_first; } while ( 0); |
| 207 | free(rr); |
| 208 | } |
| 209 | free_config(conf); |
| 210 | exit(0); |
| 211 | } |
| 212 | |
| 213 | switch (proc) { |
| 214 | case PROC_MAIN: |
| 215 | break; |
| 216 | case PROC_RDE: |
| 217 | rde_main(debug, cmd_opts & BGPD_OPT_VERBOSE0x0001); |
| 218 | /* NOTREACHED */ |
| 219 | case PROC_SE: |
| 220 | session_main(debug, cmd_opts & BGPD_OPT_VERBOSE0x0001); |
| 221 | /* NOTREACHED */ |
| 222 | case PROC_RTR: |
| 223 | rtr_main(debug, cmd_opts & BGPD_OPT_VERBOSE0x0001); |
| 224 | /* NOTREACHED */ |
| 225 | } |
| 226 | |
| 227 | if (geteuid()) |
| 228 | errx(1, "need root privileges"); |
| 229 | |
| 230 | if (getpwnam(BGPD_USER"_bgpd") == NULL((void *)0)) |
| 231 | errx(1, "unknown user %s", BGPD_USER"_bgpd"); |
| 232 | |
| 233 | if ((conf = parse_config(conffile, NULL((void *)0), NULL((void *)0))) == NULL((void *)0)) { |
| 234 | log_warnx("config file %s has errors", conffile); |
| 235 | exit(1); |
| 236 | } |
| 237 | |
| 238 | if (prepare_listeners(conf) == -1) |
| 239 | exit(1); |
| 240 | |
| 241 | log_init(debug, LOG_DAEMON(3<<3)); |
| 242 | log_setverbose(cmd_opts & BGPD_OPT_VERBOSE0x0001); |
| 243 | |
| 244 | if (!debug) |
| 245 | daemon(1, 0); |
| 246 | |
| 247 | log_info("startup"); |
| 248 | |
| 249 | getsockpair(pipe_m2s); |
| 250 | getsockpair(pipe_m2r); |
| 251 | getsockpair(pipe_m2roa); |
| 252 | |
| 253 | /* fork children */ |
| 254 | rde_pid = start_child(PROC_RDE, saved_argv0, pipe_m2r[1], debug, |
| 255 | cmd_opts & BGPD_OPT_VERBOSE0x0001); |
| 256 | se_pid = start_child(PROC_SE, saved_argv0, pipe_m2s[1], debug, |
| 257 | cmd_opts & BGPD_OPT_VERBOSE0x0001); |
| 258 | rtr_pid = start_child(PROC_RTR, saved_argv0, pipe_m2roa[1], debug, |
| 259 | cmd_opts & BGPD_OPT_VERBOSE0x0001); |
| 260 | |
| 261 | signal(SIGTERM15, sighdlr); |
| 262 | signal(SIGINT2, sighdlr); |
| 263 | signal(SIGHUP1, sighdlr); |
| 264 | signal(SIGALRM14, sighdlr); |
| 265 | signal(SIGUSR130, sighdlr); |
| 266 | signal(SIGPIPE13, SIG_IGN(void (*)(int))1); |
| 267 | |
| 268 | if ((ibuf_se = malloc(sizeof(struct imsgbuf))) == NULL((void *)0) || |
| 269 | (ibuf_rde = malloc(sizeof(struct imsgbuf))) == NULL((void *)0) || |
| 270 | (ibuf_rtr = malloc(sizeof(struct imsgbuf))) == NULL((void *)0)) |
| 271 | fatal(NULL((void *)0)); |
| 272 | imsg_init(ibuf_se, pipe_m2s[0]); |
| 273 | imsg_init(ibuf_rde, pipe_m2r[0]); |
| 274 | imsg_init(ibuf_rtr, pipe_m2roa[0]); |
| 275 | mrt_init(ibuf_rde, ibuf_se); |
| 276 | if (kr_init(&rfd) == -1) |
| 277 | quit = 1; |
| 278 | keyfd = pfkey_init(); |
| 279 | |
| 280 | /* |
| 281 | * rpath, read config file |
| 282 | * cpath, unlink control socket |
| 283 | * fattr, chmod on control socket |
| 284 | * wpath, needed if we are doing mrt dumps |
| 285 | * |
| 286 | * pledge placed here because kr_init() does a setsockopt on the |
| 287 | * routing socket thats not allowed at all. |
| 288 | */ |
| 289 | #if 0 |
| 290 | /* |
| 291 | * disabled because we do ioctls on /dev/pf and SIOCSIFGATTR |
| 292 | * this needs some redesign of bgpd to be fixed. |
| 293 | */ |
| 294 | BROKEN if (pledge("stdio rpath wpath cpath fattr unix route recvfd sendfd", |
| 295 | NULL((void *)0)) == -1) |
| 296 | fatal("pledge"); |
| 297 | #endif |
| 298 | |
| 299 | if (imsg_send_sockets(ibuf_se, ibuf_rde, ibuf_rtr)) |
| 300 | fatal("could not establish imsg links"); |
| 301 | /* control setup needs to happen late since it sends imsgs */ |
| 302 | if (control_setup(conf) == -1) |
| 303 | quit = 1; |
| 304 | if (send_config(conf) != 0) |
| 305 | quit = 1; |
| 306 | if (pftable_clear_all() != 0) |
| 307 | quit = 1; |
| 308 | |
| 309 | while (quit == 0) { |
| 310 | if (pfd_elms < PFD_CONNECT_START5 + connect_cnt) { |
| 311 | struct pollfd *newp; |
| 312 | |
| 313 | if ((newp = reallocarray(pfd, |
| 314 | PFD_CONNECT_START5 + connect_cnt, |
| 315 | sizeof(struct pollfd))) == NULL((void *)0)) { |
| 316 | log_warn("could not resize pfd from %u -> %u" |
| 317 | " entries", pfd_elms, PFD_CONNECT_START5 + |
| 318 | connect_cnt); |
| 319 | fatalx("exiting"); |
| 320 | } |
| 321 | pfd = newp; |
| 322 | pfd_elms = PFD_CONNECT_START5 + connect_cnt; |
| 323 | } |
| 324 | bzero(pfd, sizeof(struct pollfd) * pfd_elms); |
| 325 | |
| 326 | timeout = mrt_timeout(conf->mrt); |
| 327 | |
| 328 | pfd[PFD_SOCK_ROUTE3].fd = rfd; |
| 329 | pfd[PFD_SOCK_ROUTE3].events = POLLIN0x0001; |
| 330 | |
| 331 | pfd[PFD_SOCK_PFKEY4].fd = keyfd; |
| 332 | pfd[PFD_SOCK_PFKEY4].events = POLLIN0x0001; |
| 333 | |
| 334 | set_pollfd(&pfd[PFD_PIPE_SESSION0], ibuf_se); |
| 335 | set_pollfd(&pfd[PFD_PIPE_RDE1], ibuf_rde); |
| 336 | set_pollfd(&pfd[PFD_PIPE_RTR2], ibuf_rtr); |
| 337 | |
| 338 | npfd = PFD_CONNECT_START5; |
| 339 | TAILQ_FOREACH(ce, &connect_queue, entry)for((ce) = ((&connect_queue)->tqh_first); (ce) != ((void *)0); (ce) = ((ce)->entry.tqe_next)) { |
| 340 | pfd[npfd].fd = ce->fd; |
| 341 | pfd[npfd++].events = POLLOUT0x0004; |
| 342 | if (npfd > pfd_elms) |
| 343 | fatalx("polli pfd overflow"); |
| 344 | } |
| 345 | |
| 346 | if (timeout < 0 || timeout > MAX_TIMEOUT3600) |
| 347 | timeout = MAX_TIMEOUT3600; |
| 348 | if (poll(pfd, npfd, timeout * 1000) == -1) |
| 349 | if (errno(*__errno()) != EINTR4) { |
| 350 | log_warn("poll error"); |
| 351 | quit = 1; |
| 352 | } |
| 353 | |
| 354 | if (handle_pollfd(&pfd[PFD_PIPE_SESSION0], ibuf_se) == -1) { |
| 355 | log_warnx("main: Lost connection to SE"); |
| 356 | msgbuf_clear(&ibuf_se->w); |
| 357 | free(ibuf_se); |
| 358 | ibuf_se = NULL((void *)0); |
| 359 | quit = 1; |
| 360 | } else { |
| 361 | if (dispatch_imsg(ibuf_se, PFD_PIPE_SESSION0, conf) == |
| 362 | -1) |
| 363 | quit = 1; |
| 364 | } |
| 365 | |
| 366 | if (handle_pollfd(&pfd[PFD_PIPE_RDE1], ibuf_rde) == -1) { |
| 367 | log_warnx("main: Lost connection to RDE"); |
| 368 | msgbuf_clear(&ibuf_rde->w); |
| 369 | free(ibuf_rde); |
| 370 | ibuf_rde = NULL((void *)0); |
| 371 | quit = 1; |
| 372 | } else { |
| 373 | if (dispatch_imsg(ibuf_rde, PFD_PIPE_RDE1, conf) == -1) |
| 374 | quit = 1; |
| 375 | } |
| 376 | |
| 377 | if (handle_pollfd(&pfd[PFD_PIPE_RTR2], ibuf_rtr) == -1) { |
| 378 | log_warnx("main: Lost connection to RTR"); |
| 379 | msgbuf_clear(&ibuf_rtr->w); |
| 380 | free(ibuf_rtr); |
| 381 | ibuf_rtr = NULL((void *)0); |
| 382 | quit = 1; |
| 383 | } else { |
| 384 | if (dispatch_imsg(ibuf_rtr, PFD_PIPE_RTR2, conf) == -1) |
| 385 | quit = 1; |
| 386 | } |
| 387 | |
| 388 | if (pfd[PFD_SOCK_ROUTE3].revents & POLLIN0x0001) { |
| 389 | if (kr_dispatch_msg(conf->default_tableid) == -1) |
| 390 | quit = 1; |
| 391 | } |
| 392 | |
| 393 | if (pfd[PFD_SOCK_PFKEY4].revents & POLLIN0x0001) { |
| 394 | if (pfkey_read(keyfd, NULL((void *)0)) == -1) { |
| 395 | log_warnx("pfkey_read failed, exiting..."); |
| 396 | quit = 1; |
| 397 | } |
| 398 | } |
| 399 | |
| 400 | for (i = PFD_CONNECT_START5; i < npfd; i++) |
| 401 | if (pfd[i].revents != 0) |
| 402 | bgpd_rtr_connect_done(pfd[i].fd, conf); |
| 403 | |
| 404 | if (reconfig) { |
| 405 | u_int error; |
| 406 | |
| 407 | reconfig = 0; |
| 408 | switch (reconfigure(conffile, conf)) { |
| 409 | case -1: /* fatal error */ |
| 410 | quit = 1; |
| 411 | break; |
| 412 | case 0: /* all OK */ |
| 413 | error = 0; |
| 414 | break; |
| 415 | case 2: |
| 416 | log_info("previous reload still running"); |
| 417 | error = CTL_RES_PENDING; |
| 418 | break; |
| 419 | default: /* parse error */ |
| 420 | log_warnx("config file %s has errors, " |
| 421 | "not reloading", conffile); |
| 422 | error = CTL_RES_PARSE_ERROR; |
| 423 | break; |
| 424 | } |
| 425 | if (reconfpid != 0) { |
| 426 | send_imsg_session(IMSG_CTL_RESULT, reconfpid, |
| 427 | &error, sizeof(error)); |
| 428 | reconfpid = 0; |
| 429 | } |
| 430 | } |
| 431 | |
| 432 | if (mrtdump) { |
| 433 | mrtdump = 0; |
| 434 | mrt_handler(conf->mrt); |
| 435 | } |
| 436 | } |
| 437 | |
| 438 | /* close pipes */ |
| 439 | if (ibuf_se) { |
| 440 | msgbuf_clear(&ibuf_se->w); |
| 441 | close(ibuf_se->fd); |
| 442 | free(ibuf_se); |
| 443 | ibuf_se = NULL((void *)0); |
| 444 | } |
| 445 | if (ibuf_rde) { |
| 446 | msgbuf_clear(&ibuf_rde->w); |
| 447 | close(ibuf_rde->fd); |
| 448 | free(ibuf_rde); |
| 449 | ibuf_rde = NULL((void *)0); |
| 450 | } |
| 451 | if (ibuf_rtr) { |
| 452 | msgbuf_clear(&ibuf_rtr->w); |
| 453 | close(ibuf_rtr->fd); |
| 454 | free(ibuf_rtr); |
| 455 | ibuf_rtr = NULL((void *)0); |
| 456 | } |
| 457 | |
| 458 | /* cleanup kernel data structures */ |
| 459 | carp_demote_shutdown(); |
| 460 | kr_shutdown(conf->fib_priority, conf->default_tableid); |
| 461 | pftable_clear_all(); |
| 462 | |
| 463 | RB_FOREACH(p, peer_head, &conf->peers)for ((p) = peer_head_RB_MINMAX(&conf->peers, -1); (p) != ((void *)0); (p) = peer_head_RB_NEXT(p)) |
| 464 | pfkey_remove(p); |
| 465 | |
| 466 | while ((rr = SIMPLEQ_FIRST(&ribnames)((&ribnames)->sqh_first)) != NULL((void *)0)) { |
| 467 | SIMPLEQ_REMOVE_HEAD(&ribnames, entry)do { if (((&ribnames)->sqh_first = (&ribnames)-> sqh_first->entry.sqe_next) == ((void *)0)) (&ribnames) ->sqh_last = &(&ribnames)->sqh_first; } while ( 0); |
| 468 | free(rr); |
| 469 | } |
| 470 | free_config(conf); |
| 471 | |
| 472 | log_debug("waiting for children to terminate"); |
| 473 | do { |
| 474 | pid = wait(&status); |
| 475 | if (pid == -1) { |
| 476 | if (errno(*__errno()) != EINTR4 && errno(*__errno()) != ECHILD10) |
| 477 | fatal("wait"); |
| 478 | } else if (WIFSIGNALED(status)(((status) & 0177) != 0177 && ((status) & 0177 ) != 0)) { |
| 479 | char *name = "unknown process"; |
| 480 | if (pid == rde_pid) |
| 481 | name = "route decision engine"; |
| 482 | else if (pid == se_pid) |
| 483 | name = "session engine"; |
| 484 | else if (pid == rtr_pid) |
| 485 | name = "rtr engine"; |
| 486 | log_warnx("%s terminated; signal %d", name, |
| 487 | WTERMSIG(status)(((status) & 0177))); |
| 488 | } |
| 489 | } while (pid != -1 || (pid == -1 && errno(*__errno()) == EINTR4)); |
| 490 | |
| 491 | free(rcname); |
| 492 | free(cname); |
| 493 | |
| 494 | log_info("terminating"); |
| 495 | return (0); |
| 496 | } |
| 497 | |
| 498 | pid_t |
| 499 | start_child(enum bgpd_process p, char *argv0, int fd, int debug, int verbose) |
| 500 | { |
| 501 | char *argv[5]; |
| 502 | int argc = 0; |
| 503 | pid_t pid; |
| 504 | |
| 505 | switch (pid = fork()) { |
| 506 | case -1: |
| 507 | fatal("cannot fork"); |
| 508 | case 0: |
| 509 | break; |
| 510 | default: |
| 511 | close(fd); |
| 512 | return (pid); |
| 513 | } |
| 514 | |
| 515 | if (fd != 3) { |
| 516 | if (dup2(fd, 3) == -1) |
| 517 | fatal("cannot setup imsg fd"); |
| 518 | } else if (fcntl(fd, F_SETFD2, 0) == -1) |
| 519 | fatal("cannot setup imsg fd"); |
| 520 | |
| 521 | argv[argc++] = argv0; |
| 522 | switch (p) { |
| 523 | case PROC_MAIN: |
| 524 | fatalx("Can not start main process"); |
| 525 | case PROC_RDE: |
| 526 | argv[argc++] = "-R"; |
| 527 | break; |
| 528 | case PROC_SE: |
| 529 | argv[argc++] = "-S"; |
| 530 | break; |
| 531 | case PROC_RTR: |
| 532 | argv[argc++] = "-T"; |
| 533 | break; |
| 534 | } |
| 535 | if (debug) |
| 536 | argv[argc++] = "-d"; |
| 537 | if (verbose) |
| 538 | argv[argc++] = "-v"; |
| 539 | argv[argc++] = NULL((void *)0); |
| 540 | |
| 541 | execvp(argv0, argv); |
| 542 | fatal("execvp"); |
| 543 | } |
| 544 | |
| 545 | int |
| 546 | send_filterset(struct imsgbuf *i, struct filter_set_head *set) |
| 547 | { |
| 548 | struct filter_set *s; |
| 549 | |
| 550 | TAILQ_FOREACH(s, set, entry)for((s) = ((set)->tqh_first); (s) != ((void *)0); (s) = (( s)->entry.tqe_next)) |
| 551 | if (imsg_compose(i, IMSG_FILTER_SET, 0, 0, -1, s, |
| 552 | sizeof(struct filter_set)) == -1) |
| 553 | return (-1); |
| 554 | return (0); |
| 555 | } |
| 556 | |
| 557 | int |
| 558 | reconfigure(char *conffile, struct bgpd_config *conf) |
| 559 | { |
| 560 | struct bgpd_config *new_conf; |
| 561 | |
| 562 | if (reconfpending) |
| 563 | return (2); |
| 564 | |
| 565 | log_info("rereading config"); |
| 566 | if ((new_conf = parse_config(conffile, &conf->peers, |
| 567 | &conf->rtrs)) == NULL((void *)0)) |
| 568 | return (1); |
| 569 | |
| 570 | merge_config(conf, new_conf); |
| 571 | |
| 572 | if (prepare_listeners(conf) == -1) { |
| 573 | return (1); |
| 574 | } |
| 575 | |
| 576 | if (control_setup(conf) == -1) { |
| 577 | return (1); |
| 578 | } |
| 579 | |
| 580 | return send_config(conf); |
| 581 | } |
| 582 | |
| 583 | int |
| 584 | send_config(struct bgpd_config *conf) |
| 585 | { |
| 586 | struct peer *p; |
| 587 | struct filter_rule *r; |
| 588 | struct listen_addr *la; |
| 589 | struct rde_rib *rr; |
| 590 | struct l3vpn *vpn; |
| 591 | struct as_set *aset; |
| 592 | struct prefixset *ps; |
| 593 | struct prefixset_item *psi, *npsi; |
| 594 | struct roa *roa, *nroa; |
| 595 | struct rtr_config *rtr; |
| 596 | |
| 597 | reconfpending = 3; /* one per child */ |
| 598 | |
| 599 | expand_networks(conf); |
| 600 | |
| 601 | cflags = conf->flags; |
| 602 | |
| 603 | /* start reconfiguration */ |
| 604 | if (imsg_compose(ibuf_se, IMSG_RECONF_CONF, 0, 0, -1, |
| 605 | conf, sizeof(*conf)) == -1) |
| 606 | return (-1); |
| 607 | if (imsg_compose(ibuf_rde, IMSG_RECONF_CONF, 0, 0, -1, |
| 608 | conf, sizeof(*conf)) == -1) |
| 609 | return (-1); |
| 610 | if (imsg_compose(ibuf_rtr, IMSG_RECONF_CONF, 0, 0, -1, |
| 611 | conf, sizeof(*conf)) == -1) |
| 612 | return (-1); |
| 613 | |
| 614 | TAILQ_FOREACH(la, conf->listen_addrs, entry)for((la) = ((conf->listen_addrs)->tqh_first); (la) != ( (void *)0); (la) = ((la)->entry.tqe_next)) { |
| 615 | if (imsg_compose(ibuf_se, IMSG_RECONF_LISTENER, 0, 0, la->fd, |
| 616 | la, sizeof(*la)) == -1) |
| 617 | return (-1); |
| 618 | la->fd = -1; |
| 619 | } |
| 620 | |
| 621 | /* adjust fib syncing on reload */ |
| 622 | ktable_preload(); |
| 623 | |
| 624 | /* RIBs for the RDE */ |
| 625 | while ((rr = SIMPLEQ_FIRST(&ribnames)((&ribnames)->sqh_first))) { |
| 626 | SIMPLEQ_REMOVE_HEAD(&ribnames, entry)do { if (((&ribnames)->sqh_first = (&ribnames)-> sqh_first->entry.sqe_next) == ((void *)0)) (&ribnames) ->sqh_last = &(&ribnames)->sqh_first; } while ( 0); |
| 627 | if (ktable_update(rr->rtableid, rr->name, rr->flags, |
| 628 | conf->fib_priority) == -1) { |
| 629 | log_warnx("failed to load rdomain %d", |
| 630 | rr->rtableid); |
| 631 | return (-1); |
| 632 | } |
| 633 | if (imsg_compose(ibuf_rde, IMSG_RECONF_RIB, 0, 0, -1, |
| 634 | rr, sizeof(*rr)) == -1) |
| 635 | return (-1); |
| 636 | free(rr); |
| 637 | } |
| 638 | |
| 639 | /* send peer list to the SE */ |
| 640 | RB_FOREACH(p, peer_head, &conf->peers)for ((p) = peer_head_RB_MINMAX(&conf->peers, -1); (p) != ((void *)0); (p) = peer_head_RB_NEXT(p)) { |
| 641 | if (imsg_compose(ibuf_se, IMSG_RECONF_PEER, p->conf.id, 0, -1, |
| 642 | &p->conf, sizeof(p->conf)) == -1) |
| 643 | return (-1); |
| 644 | |
| 645 | if (p->reconf_action == RECONF_REINIT) |
| 646 | if (pfkey_establish(p) == -1) |
| 647 | log_peer_warnx(&p->conf, "pfkey setup failed"); |
| 648 | } |
| 649 | |
| 650 | /* networks go via kroute to the RDE */ |
| 651 | kr_net_reload(conf->default_tableid, 0, &conf->networks); |
| 652 | |
| 653 | /* prefixsets for filters in the RDE */ |
| 654 | while ((ps = SIMPLEQ_FIRST(&conf->prefixsets)((&conf->prefixsets)->sqh_first)) != NULL((void *)0)) { |
| 655 | SIMPLEQ_REMOVE_HEAD(&conf->prefixsets, entry)do { if (((&conf->prefixsets)->sqh_first = (&conf ->prefixsets)->sqh_first->entry.sqe_next) == ((void * )0)) (&conf->prefixsets)->sqh_last = &(&conf ->prefixsets)->sqh_first; } while (0); |
| 656 | if (imsg_compose(ibuf_rde, IMSG_RECONF_PREFIX_SET, 0, 0, -1, |
| 657 | ps->name, sizeof(ps->name)) == -1) |
| 658 | return (-1); |
| 659 | RB_FOREACH_SAFE(psi, prefixset_tree, &ps->psitems, npsi)for ((psi) = prefixset_tree_RB_MINMAX(&ps->psitems, -1 ); ((psi) != ((void *)0)) && ((npsi) = prefixset_tree_RB_NEXT (psi), 1); (psi) = (npsi)) { |
| 660 | RB_REMOVE(prefixset_tree, &ps->psitems, psi)prefixset_tree_RB_REMOVE(&ps->psitems, psi); |
| 661 | if (imsg_compose(ibuf_rde, IMSG_RECONF_PREFIX_SET_ITEM, |
| 662 | 0, 0, -1, psi, sizeof(*psi)) == -1) |
| 663 | return (-1); |
| 664 | free(psi); |
| 665 | } |
| 666 | free(ps); |
| 667 | } |
| 668 | |
| 669 | /* originsets for filters in the RDE */ |
| 670 | while ((ps = SIMPLEQ_FIRST(&conf->originsets)((&conf->originsets)->sqh_first)) != NULL((void *)0)) { |
| 671 | SIMPLEQ_REMOVE_HEAD(&conf->originsets, entry)do { if (((&conf->originsets)->sqh_first = (&conf ->originsets)->sqh_first->entry.sqe_next) == ((void * )0)) (&conf->originsets)->sqh_last = &(&conf ->originsets)->sqh_first; } while (0); |
| 672 | if (imsg_compose(ibuf_rde, IMSG_RECONF_ORIGIN_SET, 0, 0, -1, |
| 673 | ps->name, sizeof(ps->name)) == -1) |
| 674 | return (-1); |
| 675 | RB_FOREACH_SAFE(roa, roa_tree, &ps->roaitems, nroa)for ((roa) = roa_tree_RB_MINMAX(&ps->roaitems, -1); (( roa) != ((void *)0)) && ((nroa) = roa_tree_RB_NEXT(roa ), 1); (roa) = (nroa)) { |
| 676 | RB_REMOVE(roa_tree, &ps->roaitems, roa)roa_tree_RB_REMOVE(&ps->roaitems, roa); |
| 677 | if (imsg_compose(ibuf_rde, IMSG_RECONF_ROA_ITEM, 0, 0, |
| 678 | -1, roa, sizeof(*roa)) == -1) |
| 679 | return (-1); |
| 680 | free(roa); |
| 681 | } |
| 682 | free(ps); |
| 683 | } |
| 684 | |
| 685 | /* roa table and rtr config are sent to the RTR engine */ |
| 686 | RB_FOREACH_SAFE(roa, roa_tree, &conf->roa, nroa)for ((roa) = roa_tree_RB_MINMAX(&conf->roa, -1); ((roa ) != ((void *)0)) && ((nroa) = roa_tree_RB_NEXT(roa), 1); (roa) = (nroa)) { |
| 687 | RB_REMOVE(roa_tree, &conf->roa, roa)roa_tree_RB_REMOVE(&conf->roa, roa); |
| 688 | if (imsg_compose(ibuf_rtr, IMSG_RECONF_ROA_ITEM, 0, 0, |
| 689 | -1, roa, sizeof(*roa)) == -1) |
| 690 | return (-1); |
| 691 | free(roa); |
| 692 | } |
| 693 | SIMPLEQ_FOREACH(rtr, &conf->rtrs, entry)for((rtr) = ((&conf->rtrs)->sqh_first); (rtr) != (( void *)0); (rtr) = ((rtr)->entry.sqe_next)) { |
| 694 | if (imsg_compose(ibuf_rtr, IMSG_RECONF_RTR_CONFIG, rtr->id, |
| 695 | 0, -1, rtr->descr, sizeof(rtr->descr)) == -1) |
| 696 | return (-1); |
| 697 | } |
| 698 | |
| 699 | /* as-sets for filters in the RDE */ |
| 700 | while ((aset = SIMPLEQ_FIRST(&conf->as_sets)((&conf->as_sets)->sqh_first)) != NULL((void *)0)) { |
| 701 | struct ibuf *wbuf; |
| 702 | u_int32_t *as; |
| 703 | size_t i, l, n; |
| 704 | |
| 705 | SIMPLEQ_REMOVE_HEAD(&conf->as_sets, entry)do { if (((&conf->as_sets)->sqh_first = (&conf-> as_sets)->sqh_first->entry.sqe_next) == ((void *)0)) (& conf->as_sets)->sqh_last = &(&conf->as_sets) ->sqh_first; } while (0); |
| 706 | |
| 707 | as = set_get(aset->set, &n); |
| 708 | if ((wbuf = imsg_create(ibuf_rde, IMSG_RECONF_AS_SET, 0, 0, |
| 709 | sizeof(n) + sizeof(aset->name))) == NULL((void *)0)) |
| 710 | return -1; |
| 711 | if (imsg_add(wbuf, &n, sizeof(n)) == -1 || |
| 712 | imsg_add(wbuf, aset->name, sizeof(aset->name)) == -1) |
| 713 | return -1; |
| 714 | imsg_close(ibuf_rde, wbuf); |
| 715 | |
| 716 | for (i = 0; i < n; i += l) { |
| 717 | l = (n - i > 1024 ? 1024 : n - i); |
| 718 | if (imsg_compose(ibuf_rde, IMSG_RECONF_AS_SET_ITEMS, |
| 719 | 0, 0, -1, as + i, l * sizeof(*as)) == -1) |
| 720 | return -1; |
| 721 | } |
| 722 | |
| 723 | if (imsg_compose(ibuf_rde, IMSG_RECONF_AS_SET_DONE, 0, 0, -1, |
| 724 | NULL((void *)0), 0) == -1) |
| 725 | return -1; |
| 726 | |
| 727 | set_free(aset->set); |
| 728 | free(aset); |
| 729 | } |
| 730 | |
| 731 | /* filters for the RDE */ |
| 732 | while ((r = TAILQ_FIRST(conf->filters)((conf->filters)->tqh_first)) != NULL((void *)0)) { |
| 733 | TAILQ_REMOVE(conf->filters, r, entry)do { if (((r)->entry.tqe_next) != ((void *)0)) (r)->entry .tqe_next->entry.tqe_prev = (r)->entry.tqe_prev; else ( conf->filters)->tqh_last = (r)->entry.tqe_prev; *(r) ->entry.tqe_prev = (r)->entry.tqe_next; ; ; } while (0); |
| 734 | if (send_filterset(ibuf_rde, &r->set) == -1) |
| 735 | return (-1); |
| 736 | if (imsg_compose(ibuf_rde, IMSG_RECONF_FILTER, 0, 0, -1, |
| 737 | r, sizeof(struct filter_rule)) == -1) |
| 738 | return (-1); |
| 739 | filterset_free(&r->set); |
| 740 | free(r); |
| 741 | } |
| 742 | |
| 743 | while ((vpn = SIMPLEQ_FIRST(&conf->l3vpns)((&conf->l3vpns)->sqh_first)) != NULL((void *)0)) { |
| 744 | SIMPLEQ_REMOVE_HEAD(&conf->l3vpns, entry)do { if (((&conf->l3vpns)->sqh_first = (&conf-> l3vpns)->sqh_first->entry.sqe_next) == ((void *)0)) (& conf->l3vpns)->sqh_last = &(&conf->l3vpns)-> sqh_first; } while (0); |
| 745 | if (ktable_update(vpn->rtableid, vpn->descr, vpn->flags, |
| 746 | conf->fib_priority) == -1) { |
| 747 | log_warnx("failed to load rdomain %d", |
| 748 | vpn->rtableid); |
| 749 | return (-1); |
| 750 | } |
| 751 | /* networks go via kroute to the RDE */ |
| 752 | kr_net_reload(vpn->rtableid, vpn->rd, &vpn->net_l); |
| 753 | |
| 754 | if (imsg_compose(ibuf_rde, IMSG_RECONF_VPN, 0, 0, -1, |
| 755 | vpn, sizeof(*vpn)) == -1) |
| 756 | return (-1); |
| 757 | |
| 758 | /* export targets */ |
| 759 | if (send_filterset(ibuf_rde, &vpn->export) == -1) |
| 760 | return (-1); |
| 761 | if (imsg_compose(ibuf_rde, IMSG_RECONF_VPN_EXPORT, 0, 0, |
| 762 | -1, NULL((void *)0), 0) == -1) |
| 763 | return (-1); |
| 764 | filterset_free(&vpn->export); |
| 765 | |
| 766 | /* import targets */ |
| 767 | if (send_filterset(ibuf_rde, &vpn->import) == -1) |
| 768 | return (-1); |
| 769 | if (imsg_compose(ibuf_rde, IMSG_RECONF_VPN_IMPORT, 0, 0, |
| 770 | -1, NULL((void *)0), 0) == -1) |
| 771 | return (-1); |
| 772 | filterset_free(&vpn->import); |
| 773 | |
| 774 | if (imsg_compose(ibuf_rde, IMSG_RECONF_VPN_DONE, 0, 0, |
| 775 | -1, NULL((void *)0), 0) == -1) |
| 776 | return (-1); |
| 777 | |
| 778 | free(vpn); |
| 779 | } |
| 780 | |
| 781 | /* send a drain message to know when all messages where processed */ |
| 782 | if (imsg_compose(ibuf_se, IMSG_RECONF_DRAIN, 0, 0, -1, NULL((void *)0), 0) == -1) |
| 783 | return (-1); |
| 784 | if (imsg_compose(ibuf_rde, IMSG_RECONF_DRAIN, 0, 0, -1, NULL((void *)0), 0) == -1) |
| 785 | return (-1); |
| 786 | if (imsg_compose(ibuf_rtr, IMSG_RECONF_DRAIN, 0, 0, -1, NULL((void *)0), 0) == -1) |
| 787 | return (-1); |
| 788 | |
| 789 | /* mrt changes can be sent out of bound */ |
| 790 | mrt_reconfigure(conf->mrt); |
| 791 | return (0); |
| 792 | } |
| 793 | |
| 794 | int |
| 795 | dispatch_imsg(struct imsgbuf *ibuf, int idx, struct bgpd_config *conf) |
| 796 | { |
| 797 | struct imsg imsg; |
| 798 | struct peer *p; |
| 799 | struct rtr_config *r; |
| 800 | ssize_t n; |
| 801 | int rv, verbose; |
| 802 | |
| 803 | rv = 0; |
| 804 | while (ibuf) { |
| 805 | if ((n = imsg_get(ibuf, &imsg)) == -1) |
| 806 | return (-1); |
| 807 | |
| 808 | if (n == 0) |
| 809 | break; |
| 810 | |
| 811 | switch (imsg.hdr.type) { |
| 812 | case IMSG_KROUTE_CHANGE: |
| 813 | if (idx != PFD_PIPE_RDE1) |
| 814 | log_warnx("route request not from RDE"); |
| 815 | else if (imsg.hdr.len != IMSG_HEADER_SIZEsizeof(struct imsg_hdr) + |
| 816 | sizeof(struct kroute_full)) |
| 817 | log_warnx("wrong imsg len"); |
| 818 | else if (kr_change(imsg.hdr.peerid, imsg.data, |
| 819 | conf->fib_priority)) |
| 820 | rv = -1; |
| 821 | break; |
| 822 | case IMSG_KROUTE_DELETE: |
| 823 | if (idx != PFD_PIPE_RDE1) |
| 824 | log_warnx("route request not from RDE"); |
| 825 | else if (imsg.hdr.len != IMSG_HEADER_SIZEsizeof(struct imsg_hdr) + |
| 826 | sizeof(struct kroute_full)) |
| 827 | log_warnx("wrong imsg len"); |
| 828 | else if (kr_delete(imsg.hdr.peerid, imsg.data, |
| 829 | conf->fib_priority)) |
| 830 | rv = -1; |
| 831 | break; |
| 832 | case IMSG_KROUTE_FLUSH: |
| 833 | if (idx != PFD_PIPE_RDE1) |
| 834 | log_warnx("route request not from RDE"); |
| 835 | else if (imsg.hdr.len != IMSG_HEADER_SIZEsizeof(struct imsg_hdr)) |
| 836 | log_warnx("wrong imsg len"); |
| 837 | else if (kr_flush(imsg.hdr.peerid)) |
| 838 | rv = -1; |
| 839 | break; |
| 840 | case IMSG_NEXTHOP_ADD: |
| 841 | if (idx != PFD_PIPE_RDE1) |
| 842 | log_warnx("nexthop request not from RDE"); |
| 843 | else if (imsg.hdr.len != IMSG_HEADER_SIZEsizeof(struct imsg_hdr) + |
| 844 | sizeof(struct bgpd_addr)) |
| 845 | log_warnx("wrong imsg len"); |
| 846 | else if (kr_nexthop_add(imsg.hdr.peerid, imsg.data, |
| 847 | conf) == -1) |
| 848 | rv = -1; |
| 849 | break; |
| 850 | case IMSG_NEXTHOP_REMOVE: |
| 851 | if (idx != PFD_PIPE_RDE1) |
| 852 | log_warnx("nexthop request not from RDE"); |
| 853 | else if (imsg.hdr.len != IMSG_HEADER_SIZEsizeof(struct imsg_hdr) + |
| 854 | sizeof(struct bgpd_addr)) |
| 855 | log_warnx("wrong imsg len"); |
| 856 | else |
| 857 | kr_nexthop_delete(imsg.hdr.peerid, imsg.data, |
| 858 | conf); |
| 859 | break; |
| 860 | case IMSG_PFTABLE_ADD: |
| 861 | if (idx != PFD_PIPE_RDE1) |
| 862 | log_warnx("pftable request not from RDE"); |
| 863 | else |
| 864 | if (imsg.hdr.len != IMSG_HEADER_SIZEsizeof(struct imsg_hdr) + |
| 865 | sizeof(struct pftable_msg)) |
| 866 | log_warnx("wrong imsg len"); |
| 867 | else if (pftable_addr_add(imsg.data) != 0) |
| 868 | rv = -1; |
| 869 | break; |
| 870 | case IMSG_PFTABLE_REMOVE: |
| 871 | if (idx != PFD_PIPE_RDE1) |
| 872 | log_warnx("pftable request not from RDE"); |
| 873 | else |
| 874 | if (imsg.hdr.len != IMSG_HEADER_SIZEsizeof(struct imsg_hdr) + |
| 875 | sizeof(struct pftable_msg)) |
| 876 | log_warnx("wrong imsg len"); |
| 877 | else if (pftable_addr_remove(imsg.data) != 0) |
| 878 | rv = -1; |
| 879 | break; |
| 880 | case IMSG_PFTABLE_COMMIT: |
| 881 | if (idx != PFD_PIPE_RDE1) |
| 882 | log_warnx("pftable request not from RDE"); |
| 883 | else if (imsg.hdr.len != IMSG_HEADER_SIZEsizeof(struct imsg_hdr)) |
| 884 | log_warnx("wrong imsg len"); |
| 885 | else if (pftable_commit() != 0) |
| 886 | rv = -1; |
| 887 | break; |
| 888 | case IMSG_PFKEY_RELOAD: |
| 889 | if (idx != PFD_PIPE_SESSION0) { |
| 890 | log_warnx("pfkey reload request not from SE"); |
| 891 | break; |
| 892 | } |
| 893 | p = getpeerbyid(conf, imsg.hdr.peerid); |
| 894 | if (p != NULL((void *)0)) { |
| 895 | if (pfkey_establish(p) == -1) |
| 896 | log_peer_warnx(&p->conf, |
| 897 | "pfkey setup failed"); |
| 898 | } |
| 899 | break; |
| 900 | case IMSG_CTL_RELOAD: |
| 901 | if (idx != PFD_PIPE_SESSION0) |
| 902 | log_warnx("reload request not from SE"); |
| 903 | else { |
| 904 | reconfig = 1; |
| 905 | reconfpid = imsg.hdr.pid; |
| 906 | if (imsg.hdr.len == IMSG_HEADER_SIZEsizeof(struct imsg_hdr) + |
| 907 | REASON_LEN256 && ((char *)imsg.data)[0]) |
| 908 | log_info("reload due to: %s", |
| 909 | log_reason(imsg.data)); |
| 910 | } |
| 911 | break; |
| 912 | case IMSG_CTL_FIB_COUPLE: |
| 913 | if (idx != PFD_PIPE_SESSION0) |
| 914 | log_warnx("couple request not from SE"); |
| 915 | else |
| 916 | kr_fib_couple(imsg.hdr.peerid, |
| 917 | conf->fib_priority); |
| 918 | break; |
| 919 | case IMSG_CTL_FIB_DECOUPLE: |
| 920 | if (idx != PFD_PIPE_SESSION0) |
| 921 | log_warnx("decouple request not from SE"); |
| 922 | else |
| 923 | kr_fib_decouple(imsg.hdr.peerid, |
| 924 | conf->fib_priority); |
| 925 | break; |
| 926 | case IMSG_CTL_KROUTE: |
| 927 | case IMSG_CTL_KROUTE_ADDR: |
| 928 | case IMSG_CTL_SHOW_NEXTHOP: |
| 929 | case IMSG_CTL_SHOW_INTERFACE: |
| 930 | case IMSG_CTL_SHOW_FIB_TABLES: |
| 931 | if (idx != PFD_PIPE_SESSION0) |
| 932 | log_warnx("kroute request not from SE"); |
| 933 | else |
| 934 | kr_show_route(&imsg); |
| 935 | break; |
| 936 | case IMSG_IFINFO: |
| 937 | if (idx != PFD_PIPE_SESSION0) |
| 938 | log_warnx("IFINFO request not from SE"); |
| 939 | else if (imsg.hdr.len != IMSG_HEADER_SIZEsizeof(struct imsg_hdr) + IFNAMSIZ16) |
| 940 | log_warnx("IFINFO request with wrong len"); |
| 941 | else |
| 942 | kr_ifinfo(imsg.data); |
| 943 | break; |
| 944 | case IMSG_DEMOTE: |
| 945 | if (idx != PFD_PIPE_SESSION0) |
| 946 | log_warnx("demote request not from SE"); |
| 947 | else if (imsg.hdr.len != IMSG_HEADER_SIZEsizeof(struct imsg_hdr) + |
| 948 | sizeof(struct demote_msg)) |
| 949 | log_warnx("DEMOTE request with wrong len"); |
| 950 | else { |
| 951 | struct demote_msg *msg; |
| 952 | |
| 953 | msg = imsg.data; |
| 954 | carp_demote_set(msg->demote_group, msg->level); |
| 955 | } |
| 956 | break; |
| 957 | case IMSG_CTL_LOG_VERBOSE: |
| 958 | /* already checked by SE */ |
| 959 | memcpy(&verbose, imsg.data, sizeof(verbose)); |
| 960 | log_setverbose(verbose); |
| 961 | break; |
| 962 | case IMSG_RECONF_DONE: |
| 963 | if (reconfpending == 0) { |
| 964 | log_warnx("unexpected RECONF_DONE received"); |
| 965 | break; |
| 966 | } |
| 967 | if (idx == PFD_PIPE_SESSION0) { |
| 968 | imsg_compose(ibuf_rtr, IMSG_RECONF_DONE, 0, |
| 969 | 0, -1, NULL((void *)0), 0); |
| 970 | } else if (idx == PFD_PIPE_RTR2) { |
| 971 | imsg_compose(ibuf_rde, IMSG_RECONF_DONE, 0, |
| 972 | 0, -1, NULL((void *)0), 0); |
| 973 | |
| 974 | /* finally fix kroute information */ |
| 975 | ktable_postload(conf->fib_priority); |
| 976 | |
| 977 | /* redistribute list needs to be reloaded too */ |
| 978 | kr_reload(); |
| 979 | } |
| 980 | reconfpending--; |
| 981 | break; |
| 982 | case IMSG_RECONF_DRAIN: |
| 983 | if (reconfpending == 0) { |
| 984 | log_warnx("unexpected RECONF_DRAIN received"); |
| 985 | break; |
| 986 | } |
| 987 | reconfpending--; |
| 988 | if (reconfpending == 0) { |
| 989 | /* |
| 990 | * SE goes first to bring templated neighbors |
| 991 | * in sync. |
| 992 | */ |
| 993 | imsg_compose(ibuf_se, IMSG_RECONF_DONE, 0, |
| 994 | 0, -1, NULL((void *)0), 0); |
| 995 | reconfpending = 3; /* expecting 2 DONE msg */ |
| 996 | } |
| 997 | break; |
| 998 | case IMSG_SOCKET_CONN: |
| 999 | if (idx != PFD_PIPE_RTR2) { |
| 1000 | log_warnx("connect request not from RTR"); |
| 1001 | } else { |
| 1002 | SIMPLEQ_FOREACH(r, &conf->rtrs, entry)for((r) = ((&conf->rtrs)->sqh_first); (r) != ((void *)0); (r) = ((r)->entry.sqe_next)) { |
| 1003 | if (imsg.hdr.peerid == r->id) |
| 1004 | break; |
| 1005 | } |
| 1006 | if (r == NULL((void *)0)) |
| 1007 | log_warnx("unknown rtr id %d", |
| 1008 | imsg.hdr.peerid); |
| 1009 | else |
| 1010 | bgpd_rtr_connect(r); |
| 1011 | } |
| 1012 | break; |
| 1013 | case IMSG_CTL_SHOW_RTR: |
| 1014 | if (idx == PFD_PIPE_SESSION0) { |
| 1015 | SIMPLEQ_FOREACH(r, &conf->rtrs, entry)for((r) = ((&conf->rtrs)->sqh_first); (r) != ((void *)0); (r) = ((r)->entry.sqe_next)) { |
| 1016 | imsg_compose(ibuf_rtr, imsg.hdr.type, |
| 1017 | r->id, imsg.hdr.pid, -1, NULL((void *)0), 0); |
| 1018 | } |
| 1019 | imsg_compose(ibuf_rtr, IMSG_CTL_END, |
| 1020 | 0, imsg.hdr.pid, -1, NULL((void *)0), 0); |
| 1021 | } else if (imsg.hdr.len != IMSG_HEADER_SIZEsizeof(struct imsg_hdr) + |
| 1022 | sizeof(struct ctl_show_rtr)) { |
| 1023 | log_warnx("IMSG_CTL_SHOW_RTR with wrong len"); |
| 1024 | } else if (idx == PFD_PIPE_RTR2) { |
| 1025 | SIMPLEQ_FOREACH(r, &conf->rtrs, entry)for((r) = ((&conf->rtrs)->sqh_first); (r) != ((void *)0); (r) = ((r)->entry.sqe_next)) { |
| 1026 | if (imsg.hdr.peerid == r->id) |
| 1027 | break; |
| 1028 | } |
| 1029 | if (r != NULL((void *)0)) { |
| 1030 | struct ctl_show_rtr *msg; |
| 1031 | msg = imsg.data; |
| 1032 | strlcpy(msg->descr, r->descr, |
| 1033 | sizeof(msg->descr)); |
| 1034 | msg->local_addr = r->local_addr; |
| 1035 | msg->remote_addr = r->remote_addr; |
| 1036 | msg->remote_port = r->remote_port; |
| 1037 | |
| 1038 | imsg_compose(ibuf_se, imsg.hdr.type, |
| 1039 | imsg.hdr.peerid, imsg.hdr.pid, |
| 1040 | -1, imsg.data, |
| 1041 | imsg.hdr.len - IMSG_HEADER_SIZEsizeof(struct imsg_hdr)); |
| 1042 | } |
| 1043 | } |
| 1044 | break; |
| 1045 | case IMSG_CTL_END: |
| 1046 | case IMSG_CTL_SHOW_TIMER: |
| 1047 | if (idx != PFD_PIPE_RTR2) { |
| 1048 | log_warnx("connect request not from RTR"); |
| 1049 | break; |
| 1050 | } |
| 1051 | imsg_compose(ibuf_se, imsg.hdr.type, imsg.hdr.peerid, |
| 1052 | imsg.hdr.pid, -1, imsg.data, |
| 1053 | imsg.hdr.len - IMSG_HEADER_SIZEsizeof(struct imsg_hdr)); |
| 1054 | break; |
| 1055 | default: |
| 1056 | break; |
| 1057 | } |
| 1058 | imsg_free(&imsg); |
| 1059 | if (rv != 0) |
| 1060 | return (rv); |
| 1061 | } |
| 1062 | return (0); |
| 1063 | } |
| 1064 | |
| 1065 | void |
| 1066 | send_nexthop_update(struct kroute_nexthop *msg) |
| 1067 | { |
| 1068 | char *gw = NULL((void *)0); |
| 1069 | |
| 1070 | if (msg->gateway.aid) |
| 1071 | if (asprintf(&gw, ": via %s", |
| 1072 | log_addr(&msg->gateway)) == -1) { |
| 1073 | log_warn("send_nexthop_update"); |
| 1074 | quit = 1; |
| 1075 | } |
| 1076 | |
| 1077 | log_debug("nexthop %s now %s%s%s", log_addr(&msg->nexthop), |
| 1078 | msg->valid ? "valid" : "invalid", |
| 1079 | msg->connected ? ": directly connected" : "", |
| 1080 | msg->gateway.aid ? gw : ""); |
| 1081 | |
| 1082 | free(gw); |
| 1083 | |
| 1084 | if (imsg_compose(ibuf_rde, IMSG_NEXTHOP_UPDATE, 0, 0, -1, |
| 1085 | msg, sizeof(struct kroute_nexthop)) == -1) |
| 1086 | quit = 1; |
| 1087 | } |
| 1088 | |
| 1089 | void |
| 1090 | send_imsg_session(int type, pid_t pid, void *data, u_int16_t datalen) |
| 1091 | { |
| 1092 | imsg_compose(ibuf_se, type, 0, pid, -1, data, datalen); |
| 1093 | } |
| 1094 | |
| 1095 | int |
| 1096 | send_network(int type, struct network_config *net, struct filter_set_head *h) |
| 1097 | { |
| 1098 | if (quit) |
| 1099 | return (0); |
| 1100 | if (imsg_compose(ibuf_rde, type, 0, 0, -1, net, |
| 1101 | sizeof(struct network_config)) == -1) |
| 1102 | return (-1); |
| 1103 | /* networks that get deleted don't need to send the filter set */ |
| 1104 | if (type == IMSG_NETWORK_REMOVE) |
| 1105 | return (0); |
| 1106 | if (send_filterset(ibuf_rde, h) == -1) |
| 1107 | return (-1); |
| 1108 | if (imsg_compose(ibuf_rde, IMSG_NETWORK_DONE, 0, 0, -1, NULL((void *)0), 0) == -1) |
| 1109 | return (-1); |
| 1110 | |
| 1111 | return (0); |
| 1112 | } |
| 1113 | |
| 1114 | int |
| 1115 | bgpd_filternexthop(struct kroute *kr, struct kroute6 *kr6) |
| 1116 | { |
| 1117 | /* kernel routes are never filtered */ |
| 1118 | if (kr && kr->flags & F_KERNEL0x0002 && kr->prefixlen != 0) |
| 1119 | return (0); |
| 1120 | if (kr6 && kr6->flags & F_KERNEL0x0002 && kr6->prefixlen != 0) |
| 1121 | return (0); |
| 1122 | |
| 1123 | if (cflags & BGPD_FLAG_NEXTHOP_BGP0x0010) { |
| 1124 | if (kr && kr->flags & F_BGPD_INSERTED0x0001) |
| 1125 | return (0); |
| 1126 | if (kr6 && kr6->flags & F_BGPD_INSERTED0x0001) |
| 1127 | return (0); |
| 1128 | } |
| 1129 | |
| 1130 | if (cflags & BGPD_FLAG_NEXTHOP_DEFAULT0x0020) { |
| 1131 | if (kr && kr->prefixlen == 0) |
| 1132 | return (0); |
| 1133 | if (kr6 && kr6->prefixlen == 0) |
| 1134 | return (0); |
| 1135 | } |
| 1136 | |
| 1137 | return (1); |
| 1138 | } |
| 1139 | |
| 1140 | int |
| 1141 | control_setup(struct bgpd_config *conf) |
| 1142 | { |
| 1143 | int fd, restricted; |
| 1144 | |
| 1145 | /* control socket is outside chroot */ |
| 1146 | if (!cname || strcmp(cname, conf->csock)) { |
| 1147 | if (cname) { |
| 1148 | free(cname); |
| 1149 | } |
| 1150 | if ((cname = strdup(conf->csock)) == NULL((void *)0)) |
| 1151 | fatal("strdup"); |
| 1152 | if (control_check(cname) == -1) |
| 1153 | return (-1); |
| 1154 | if ((fd = control_init(0, cname)) == -1) |
| 1155 | fatalx("control socket setup failed"); |
| 1156 | if (control_listen(fd) == -1) |
| 1157 | fatalx("control socket setup failed"); |
| 1158 | restricted = 0; |
| 1159 | if (imsg_compose(ibuf_se, IMSG_RECONF_CTRL, 0, 0, fd, |
| 1160 | &restricted, sizeof(restricted)) == -1) |
| 1161 | return (-1); |
| 1162 | } |
| 1163 | if (!conf->rcsock) { |
| 1164 | /* remove restricted socket */ |
| 1165 | free(rcname); |
| 1166 | rcname = NULL((void *)0); |
| 1167 | } else if (!rcname || strcmp(rcname, conf->rcsock)) { |
| 1168 | if (rcname) { |
| 1169 | free(rcname); |
| 1170 | } |
| 1171 | if ((rcname = strdup(conf->rcsock)) == NULL((void *)0)) |
| 1172 | fatal("strdup"); |
| 1173 | if (control_check(rcname) == -1) |
| 1174 | return (-1); |
| 1175 | if ((fd = control_init(1, rcname)) == -1) |
| 1176 | fatalx("control socket setup failed"); |
| 1177 | if (control_listen(fd) == -1) |
| 1178 | fatalx("control socket setup failed"); |
| 1179 | restricted = 1; |
| 1180 | if (imsg_compose(ibuf_se, IMSG_RECONF_CTRL, 0, 0, fd, |
| 1181 | &restricted, sizeof(restricted)) == -1) |
| 1182 | return (-1); |
| 1183 | } |
| 1184 | return (0); |
| 1185 | } |
| 1186 | |
| 1187 | void |
| 1188 | set_pollfd(struct pollfd *pfd, struct imsgbuf *i) |
| 1189 | { |
| 1190 | if (i == NULL((void *)0) || i->fd == -1) { |
| 1191 | pfd->fd = -1; |
| 1192 | return; |
| 1193 | } |
| 1194 | pfd->fd = i->fd; |
| 1195 | pfd->events = POLLIN0x0001; |
| 1196 | if (i->w.queued > 0) |
| 1197 | pfd->events |= POLLOUT0x0004; |
| 1198 | } |
| 1199 | |
| 1200 | int |
| 1201 | handle_pollfd(struct pollfd *pfd, struct imsgbuf *i) |
| 1202 | { |
| 1203 | ssize_t n; |
| 1204 | |
| 1205 | if (i == NULL((void *)0)) |
| 1206 | return (0); |
| 1207 | |
| 1208 | if (pfd->revents & POLLOUT0x0004) |
| 1209 | if (msgbuf_write(&i->w) <= 0 && errno(*__errno()) != EAGAIN35) { |
| 1210 | log_warn("imsg write error"); |
| 1211 | close(i->fd); |
| 1212 | i->fd = -1; |
| 1213 | return (-1); |
| 1214 | } |
| 1215 | |
| 1216 | if (pfd->revents & POLLIN0x0001) { |
| 1217 | if ((n = imsg_read(i)) == -1 && errno(*__errno()) != EAGAIN35) { |
| 1218 | log_warn("imsg read error"); |
| 1219 | close(i->fd); |
| 1220 | i->fd = -1; |
| 1221 | return (-1); |
| 1222 | } |
| 1223 | if (n == 0) { |
| 1224 | log_warnx("peer closed imsg connection"); |
| 1225 | close(i->fd); |
| 1226 | i->fd = -1; |
| 1227 | return (-1); |
| 1228 | } |
| 1229 | } |
| 1230 | return (0); |
| 1231 | } |
| 1232 | |
| 1233 | static void |
| 1234 | getsockpair(int pipe[2]) |
| 1235 | { |
| 1236 | int bsize, i; |
| 1237 | |
| 1238 | if (socketpair(AF_UNIX1, SOCK_STREAM1 | SOCK_CLOEXEC0x8000 | SOCK_NONBLOCK0x4000, |
| 1239 | PF_UNSPEC0, pipe) == -1) |
| 1240 | fatal("socketpair"); |
| 1241 | |
| 1242 | for (i = 0; i < 2; i++) { |
| 1243 | for (bsize = MAX_SOCK_BUF(4 * 65535); bsize >= 16 * 1024; bsize /= 2) { |
| 1244 | if (setsockopt(pipe[i], SOL_SOCKET0xffff, SO_RCVBUF0x1002, |
| 1245 | &bsize, sizeof(bsize)) == -1) { |
| 1246 | if (errno(*__errno()) != ENOBUFS55) |
| 1247 | fatal("setsockopt(SO_RCVBUF, %d)", |
| 1248 | bsize); |
| 1249 | log_warn("setsockopt(SO_RCVBUF, %d)", bsize); |
| 1250 | continue; |
| 1251 | } |
| 1252 | break; |
| 1253 | } |
| 1254 | } |
| 1255 | for (i = 0; i < 2; i++) { |
| 1256 | for (bsize = MAX_SOCK_BUF(4 * 65535); bsize >= 16 * 1024; bsize /= 2) { |
| 1257 | if (setsockopt(pipe[i], SOL_SOCKET0xffff, SO_SNDBUF0x1001, |
| 1258 | &bsize, sizeof(bsize)) == -1) { |
| 1259 | if (errno(*__errno()) != ENOBUFS55) |
| 1260 | fatal("setsockopt(SO_SNDBUF, %d)", |
| 1261 | bsize); |
| 1262 | log_warn("setsockopt(SO_SNDBUF, %d)", bsize); |
| 1263 | continue; |
| 1264 | } |
| 1265 | break; |
| 1266 | } |
| 1267 | } |
| 1268 | } |
| 1269 | |
| 1270 | int |
| 1271 | imsg_send_sockets(struct imsgbuf *se, struct imsgbuf *rde, struct imsgbuf *roa) |
| 1272 | { |
| 1273 | int pipe_s2r[2]; |
| 1274 | int pipe_s2r_ctl[2]; |
| 1275 | int pipe_r2r[2]; |
| 1276 | |
| 1277 | getsockpair(pipe_s2r); |
| 1278 | getsockpair(pipe_s2r_ctl); |
| 1279 | getsockpair(pipe_r2r); |
| 1280 | |
| 1281 | if (imsg_compose(se, IMSG_SOCKET_CONN, 0, 0, pipe_s2r[0], |
| 1282 | NULL((void *)0), 0) == -1) |
| 1283 | return (-1); |
| 1284 | if (imsg_compose(rde, IMSG_SOCKET_CONN, 0, 0, pipe_s2r[1], |
| 1285 | NULL((void *)0), 0) == -1) |
| 1286 | return (-1); |
| 1287 | |
| 1288 | if (imsg_compose(se, IMSG_SOCKET_CONN_CTL, 0, 0, pipe_s2r_ctl[0], |
| 1289 | NULL((void *)0), 0) == -1) |
| 1290 | return (-1); |
| 1291 | if (imsg_compose(rde, IMSG_SOCKET_CONN_CTL, 0, 0, pipe_s2r_ctl[1], |
| 1292 | NULL((void *)0), 0) == -1) |
| 1293 | return (-1); |
| 1294 | |
| 1295 | if (imsg_compose(roa, IMSG_SOCKET_CONN_RTR, 0, 0, pipe_r2r[0], |
| 1296 | NULL((void *)0), 0) == -1) |
| 1297 | return (-1); |
| 1298 | if (imsg_compose(rde, IMSG_SOCKET_CONN_RTR, 0, 0, pipe_r2r[1], |
| 1299 | NULL((void *)0), 0) == -1) |
| 1300 | return (-1); |
| 1301 | |
| 1302 | return (0); |
| 1303 | } |
| 1304 | |
| 1305 | void |
| 1306 | bgpd_rtr_connect(struct rtr_config *r) |
| 1307 | { |
| 1308 | struct connect_elm *ce; |
| 1309 | struct sockaddr *sa; |
| 1310 | socklen_t len; |
| 1311 | |
| 1312 | if (connect_cnt >= MAX_CONNECT_CNT32) { |
| 1313 | log_warnx("rtr %s: too many concurrent connection requests", |
| 1314 | r->descr); |
| 1315 | return; |
| 1316 | } |
| 1317 | |
| 1318 | if ((ce = calloc(1, sizeof(*ce))) == NULL((void *)0)) { |
| 1319 | log_warn("rtr %s", r->descr); |
| 1320 | return; |
| 1321 | } |
| 1322 | |
| 1323 | ce->id = r->id; |
| 1324 | ce->fd = socket(aid2af(r->remote_addr.aid), |
| 1325 | SOCK_STREAM1 | SOCK_CLOEXEC0x8000 | SOCK_NONBLOCK0x4000, IPPROTO_TCP6); |
| 1326 | if (ce->fd == -1) { |
| 1327 | log_warn("rtr %s", r->descr); |
| 1328 | free(ce); |
| 1329 | return; |
| 1330 | } |
| 1331 | |
| 1332 | if ((sa = addr2sa(&r->local_addr, 0, &len)) != NULL((void *)0)) { |
| 1333 | if (bind(ce->fd, sa, len) == -1) { |
| 1334 | log_warn("rtr %s: bind to %s", r->descr, |
| 1335 | log_addr(&r->local_addr)); |
| 1336 | close(ce->fd); |
| 1337 | free(ce); |
| 1338 | return; |
| 1339 | } |
| 1340 | } |
| 1341 | |
| 1342 | sa = addr2sa(&r->remote_addr, r->remote_port, &len); |
| 1343 | if (connect(ce->fd, sa, len) == -1) { |
| 1344 | if (errno(*__errno()) != EINPROGRESS36) { |
| 1345 | log_warn("rtr %s: connect to %s:%u", r->descr, |
| 1346 | log_addr(&r->remote_addr), r->remote_port); |
| 1347 | close(ce->fd); |
| 1348 | free(ce); |
| 1349 | return; |
| 1350 | } |
| 1351 | TAILQ_INSERT_TAIL(&connect_queue, ce, entry)do { (ce)->entry.tqe_next = ((void *)0); (ce)->entry.tqe_prev = (&connect_queue)->tqh_last; *(&connect_queue)-> tqh_last = (ce); (&connect_queue)->tqh_last = &(ce )->entry.tqe_next; } while (0); |
| 1352 | connect_cnt++; |
| 1353 | return; |
| 1354 | } |
| 1355 | |
| 1356 | imsg_compose(ibuf_rtr, IMSG_SOCKET_CONN, ce->id, 0, ce->fd, NULL((void *)0), 0); |
| 1357 | free(ce); |
| 1358 | } |
| 1359 | |
| 1360 | void |
| 1361 | bgpd_rtr_connect_done(int fd, struct bgpd_config *conf) |
| 1362 | { |
| 1363 | struct rtr_config *r; |
| 1364 | struct connect_elm *ce; |
| 1365 | int error = 0; |
| 1366 | socklen_t len; |
| 1367 | |
| 1368 | TAILQ_FOREACH(ce, &connect_queue, entry)for((ce) = ((&connect_queue)->tqh_first); (ce) != ((void *)0); (ce) = ((ce)->entry.tqe_next)) { |
| 1369 | if (ce->fd == fd) |
| 1370 | break; |
| 1371 | } |
| 1372 | if (ce == NULL((void *)0)) |
| 1373 | fatalx("connect entry not found"); |
| 1374 | |
| 1375 | TAILQ_REMOVE(&connect_queue, ce, entry)do { if (((ce)->entry.tqe_next) != ((void *)0)) (ce)->entry .tqe_next->entry.tqe_prev = (ce)->entry.tqe_prev; else ( &connect_queue)->tqh_last = (ce)->entry.tqe_prev; * (ce)->entry.tqe_prev = (ce)->entry.tqe_next; ; ; } while (0); |
| 1376 | connect_cnt--; |
| 1377 | |
| 1378 | SIMPLEQ_FOREACH(r, &conf->rtrs, entry)for((r) = ((&conf->rtrs)->sqh_first); (r) != ((void *)0); (r) = ((r)->entry.sqe_next)) { |
| 1379 | if (ce->id == r->id) |
| 1380 | break; |
| 1381 | } |
| 1382 | if (r == NULL((void *)0)) { |
| 1383 | log_warnx("rtr id %d no longer exists", ce->id); |
| 1384 | goto fail; |
| 1385 | } |
| 1386 | |
| 1387 | len = sizeof(error); |
| 1388 | if (getsockopt(fd, SOL_SOCKET0xffff, SO_ERROR0x1007, &error, &len) == -1) { |
| 1389 | log_warn("rtr %s: getsockopt SO_ERROR", r->descr); |
| 1390 | goto fail; |
| 1391 | } |
| 1392 | |
| 1393 | if (error != 0) { |
| 1394 | errno(*__errno()) = error; |
| 1395 | log_warn("rtr %s: connect to %s:%u", r->descr, |
| 1396 | log_addr(&r->remote_addr), r->remote_port); |
| 1397 | goto fail; |
| 1398 | } |
| 1399 | |
| 1400 | imsg_compose(ibuf_rtr, IMSG_SOCKET_CONN, ce->id, 0, ce->fd, NULL((void *)0), 0); |
| 1401 | free(ce); |
| 1402 | return; |
| 1403 | |
| 1404 | fail: |
| 1405 | close(fd); |
| 1406 | free(ce); |
| 1407 | } |