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1 /* $OpenBSD$ */
2
3 /*
4 * Copyright (c) 2013, 2016 Renato Westphal <renato@openbsd.org>
5 * Copyright (c) 2005 Claudio Jeker <claudio@openbsd.org>
6 * Copyright (c) 2004, 2008 Esben Norby <norby@openbsd.org>
7 * Copyright (c) 2003, 2004 Henning Brauer <henning@openbsd.org>
8 *
9 * Permission to use, copy, modify, and distribute this software for any
10 * purpose with or without fee is hereby granted, provided that the above
11 * copyright notice and this permission notice appear in all copies.
12 *
13 * THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
14 * WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
15 * MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR
16 * ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
17 * WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
18 * ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF
19 * OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
20 */
21
22 #include <zebra.h>
23 #include <sys/wait.h>
24
25 #include "ldpd.h"
26 #include "ldpe.h"
27 #include "lde.h"
28 #include "log.h"
29 #include "ldp_vty.h"
30 #include "ldp_debug.h"
31
32 #include <lib/version.h>
33 #include <lib/log.h>
34 #include "getopt.h"
35 #include "vty.h"
36 #include "command.h"
37 #include "memory.h"
38 #include "privs.h"
39 #include "sigevent.h"
40 #include "zclient.h"
41 #include "vrf.h"
42 #include "filter.h"
43 #include "qobj.h"
44 #include "libfrr.h"
45 #include "lib_errors.h"
46
47 static void ldpd_shutdown(void);
48 static pid_t start_child(enum ldpd_process, char *, int, int);
49 static int main_dispatch_ldpe(struct thread *);
50 static int main_dispatch_lde(struct thread *);
51 static int main_imsg_send_ipc_sockets(struct imsgbuf *,
52 struct imsgbuf *);
53 static void main_imsg_send_net_sockets(int);
54 static void main_imsg_send_net_socket(int, enum socket_type);
55 static int main_imsg_send_config(struct ldpd_conf *);
56 static void ldp_config_normalize(struct ldpd_conf *);
57 static void ldp_config_reset(struct ldpd_conf *);
58 static void ldp_config_reset_main(struct ldpd_conf *);
59 static void ldp_config_reset_af(struct ldpd_conf *, int);
60 static void ldp_config_reset_l2vpns(struct ldpd_conf *);
61 static void merge_global(struct ldpd_conf *, struct ldpd_conf *);
62 static void merge_af(int, struct ldpd_af_conf *,
63 struct ldpd_af_conf *);
64 static void merge_ifaces(struct ldpd_conf *, struct ldpd_conf *);
65 static void merge_iface_af(struct iface_af *, struct iface_af *);
66 static void merge_tnbrs(struct ldpd_conf *, struct ldpd_conf *);
67 static void merge_nbrps(struct ldpd_conf *, struct ldpd_conf *);
68 static void merge_l2vpns(struct ldpd_conf *, struct ldpd_conf *);
69 static void merge_l2vpn(struct ldpd_conf *, struct l2vpn *,
70 struct l2vpn *);
71
72 DEFINE_QOBJ_TYPE(iface)
73 DEFINE_QOBJ_TYPE(tnbr)
74 DEFINE_QOBJ_TYPE(nbr_params)
75 DEFINE_QOBJ_TYPE(l2vpn_if)
76 DEFINE_QOBJ_TYPE(l2vpn_pw)
77 DEFINE_QOBJ_TYPE(l2vpn)
78 DEFINE_QOBJ_TYPE(ldpd_conf)
79
80 struct ldpd_global global;
81 struct ldpd_init init;
82 struct ldpd_conf *ldpd_conf, *vty_conf;
83
84 static struct imsgev *iev_ldpe, *iev_ldpe_sync;
85 static struct imsgev *iev_lde, *iev_lde_sync;
86 static pid_t ldpe_pid;
87 static pid_t lde_pid;
88
89 #define LDP_DEFAULT_CONFIG "ldpd.conf"
90 #define LDP_VTY_PORT 2612
91
92 /* Master of threads. */
93 struct thread_master *master;
94
95 static struct frr_daemon_info ldpd_di;
96
97 /* ldpd privileges */
98 static zebra_capabilities_t _caps_p [] =
99 {
100 ZCAP_BIND,
101 ZCAP_NET_ADMIN
102 };
103
104 struct zebra_privs_t ldpd_privs =
105 {
106 #if defined(FRR_USER) && defined(FRR_GROUP)
107 .user = FRR_USER,
108 .group = FRR_GROUP,
109 #endif
110 #if defined(VTY_GROUP)
111 .vty_group = VTY_GROUP,
112 #endif
113 .caps_p = _caps_p,
114 .cap_num_p = array_size(_caps_p),
115 .cap_num_i = 0
116 };
117
118 /* CTL Socket path */
119 char ctl_sock_path[MAXPATHLEN] = LDPD_SOCKET;
120
121 /* LDPd options. */
122 #define OPTION_CTLSOCK 1001
123 static struct option longopts[] =
124 {
125 { "ctl_socket", required_argument, NULL, OPTION_CTLSOCK},
126 { "instance", required_argument, NULL, 'n'},
127 { 0 }
128 };
129
130 /* SIGHUP handler. */
131 static void
132 sighup(void)
133 {
134 log_info("SIGHUP received");
135
136 /*
137 * Do a full configuration reload. In other words, reset vty_conf
138 * and build a new configuartion from scratch.
139 */
140 ldp_config_reset(vty_conf);
141 vty_read_config(NULL, ldpd_di.config_file, config_default);
142 ldp_config_apply(NULL, vty_conf);
143 }
144
145 /* SIGINT / SIGTERM handler. */
146 static void
147 sigint(void)
148 {
149 log_info("SIGINT received");
150 ldpd_shutdown();
151 }
152
153 /* SIGUSR1 handler. */
154 static void
155 sigusr1(void)
156 {
157 zlog_rotate();
158 }
159
160 static struct quagga_signal_t ldp_signals[] =
161 {
162 {
163 .signal = SIGHUP,
164 .handler = &sighup,
165 },
166 {
167 .signal = SIGINT,
168 .handler = &sigint,
169 },
170 {
171 .signal = SIGTERM,
172 .handler = &sigint,
173 },
174 {
175 .signal = SIGUSR1,
176 .handler = &sigusr1,
177 }
178 };
179
180 static const struct frr_yang_module_info *ldpd_yang_modules[] = {
181 };
182
183 FRR_DAEMON_INFO(ldpd, LDP,
184 .vty_port = LDP_VTY_PORT,
185
186 .proghelp = "Implementation of the LDP protocol.",
187
188 .signals = ldp_signals,
189 .n_signals = array_size(ldp_signals),
190
191 .privs = &ldpd_privs,
192
193 .yang_modules = ldpd_yang_modules,
194 .n_yang_modules = array_size(ldpd_yang_modules),
195 )
196
197 static int ldp_config_fork_apply(struct thread *t)
198 {
199 /*
200 * So the frr_config_fork() function schedules
201 * the read of the vty config( if there is a
202 * non-integrated config ) to be after the
203 * end of startup and we are starting the
204 * main process loop. We need to schedule
205 * the application of this if necessary
206 * after the read in of the config.
207 */
208 ldp_config_apply(NULL, vty_conf);
209
210 return 0;
211 }
212
213 int
214 main(int argc, char *argv[])
215 {
216 char *saved_argv0;
217 int lflag = 0, eflag = 0;
218 int pipe_parent2ldpe[2], pipe_parent2ldpe_sync[2];
219 int pipe_parent2lde[2], pipe_parent2lde_sync[2];
220 char *ctl_sock_name;
221 struct thread *thread = NULL;
222
223 ldpd_process = PROC_MAIN;
224 log_procname = log_procnames[ldpd_process];
225
226 saved_argv0 = argv[0];
227 if (saved_argv0 == NULL)
228 saved_argv0 = (char *)"ldpd";
229
230 frr_preinit(&ldpd_di, argc, argv);
231 frr_opt_add("LEn:", longopts,
232 " --ctl_socket Override ctl socket path\n"
233 " -n, --instance Instance id\n");
234
235 while (1) {
236 int opt;
237
238 opt = frr_getopt(argc, argv, NULL);
239
240 if (opt == EOF)
241 break;
242
243 switch (opt) {
244 case 0:
245 break;
246 case OPTION_CTLSOCK:
247 ctl_sock_name = strrchr(LDPD_SOCKET, '/');
248 if (ctl_sock_name)
249 /* skip '/' */
250 ctl_sock_name++;
251 else
252 /*
253 * LDPD_SOCKET configured as relative path
254 * during config? Should really never happen for
255 * sensible config
256 */
257 ctl_sock_name = (char *)LDPD_SOCKET;
258 strlcpy(ctl_sock_path, optarg, sizeof(ctl_sock_path));
259 strlcat(ctl_sock_path, "/", sizeof(ctl_sock_path));
260 strlcat(ctl_sock_path, ctl_sock_name,
261 sizeof(ctl_sock_path));
262 break;
263 case 'n':
264 init.instance = atoi(optarg);
265 if (init.instance < 1)
266 exit(0);
267 break;
268 case 'L':
269 lflag = 1;
270 break;
271 case 'E':
272 eflag = 1;
273 break;
274 default:
275 frr_help_exit(1);
276 break;
277 }
278 }
279
280 strlcpy(init.user, ldpd_privs.user, sizeof(init.user));
281 strlcpy(init.group, ldpd_privs.group, sizeof(init.group));
282 strlcpy(init.ctl_sock_path, ctl_sock_path, sizeof(init.ctl_sock_path));
283 strlcpy(init.zclient_serv_path, frr_zclientpath,
284 sizeof(init.zclient_serv_path));
285
286 argc -= optind;
287 if (argc > 0 || (lflag && eflag))
288 frr_help_exit(1);
289
290 /* check for root privileges */
291 if (geteuid() != 0) {
292 errno = EPERM;
293 perror(ldpd_di.progname);
294 exit(1);
295 }
296
297 if (lflag || eflag)
298 openzlog(ldpd_di.progname, "LDP", 0,
299 LOG_CONS | LOG_NDELAY | LOG_PID, LOG_DAEMON);
300 if (lflag)
301 lde();
302 else if (eflag)
303 ldpe();
304
305 if (socketpair(AF_UNIX, SOCK_STREAM, PF_UNSPEC, pipe_parent2ldpe) == -1)
306 fatal("socketpair");
307 if (socketpair(AF_UNIX, SOCK_STREAM, PF_UNSPEC,
308 pipe_parent2ldpe_sync) == -1)
309 fatal("socketpair");
310 if (socketpair(AF_UNIX, SOCK_STREAM, PF_UNSPEC, pipe_parent2lde) == -1)
311 fatal("socketpair");
312 if (socketpair(AF_UNIX, SOCK_STREAM, PF_UNSPEC,
313 pipe_parent2lde_sync) == -1)
314 fatal("socketpair");
315 sock_set_nonblock(pipe_parent2ldpe[0]);
316 sock_set_cloexec(pipe_parent2ldpe[0]);
317 sock_set_nonblock(pipe_parent2ldpe[1]);
318 sock_set_cloexec(pipe_parent2ldpe[1]);
319 sock_set_nonblock(pipe_parent2ldpe_sync[0]);
320 sock_set_cloexec(pipe_parent2ldpe_sync[0]);
321 sock_set_cloexec(pipe_parent2ldpe_sync[1]);
322 sock_set_nonblock(pipe_parent2lde[0]);
323 sock_set_cloexec(pipe_parent2lde[0]);
324 sock_set_nonblock(pipe_parent2lde[1]);
325 sock_set_cloexec(pipe_parent2lde[1]);
326 sock_set_nonblock(pipe_parent2lde_sync[0]);
327 sock_set_cloexec(pipe_parent2lde_sync[0]);
328 sock_set_cloexec(pipe_parent2lde_sync[1]);
329
330 /* start children */
331 lde_pid = start_child(PROC_LDE_ENGINE, saved_argv0,
332 pipe_parent2lde[1], pipe_parent2lde_sync[1]);
333 ldpe_pid = start_child(PROC_LDP_ENGINE, saved_argv0,
334 pipe_parent2ldpe[1], pipe_parent2ldpe_sync[1]);
335
336 master = frr_init();
337
338 vrf_init(NULL, NULL, NULL, NULL, NULL);
339 access_list_init();
340 ldp_vty_init();
341 ldp_zebra_init(master);
342
343 /*
344 * Create base configuration with sane defaults. All configuration
345 * requests (e.g. CLI) act on vty_conf and then call ldp_config_apply()
346 * to merge the changes into ldpd_conf, which contains the actual
347 * running configuration.
348 */
349 ldpd_conf = config_new_empty();
350 vty_conf = config_new_empty();
351 QOBJ_REG(vty_conf, ldpd_conf);
352
353 /* read configuration file and daemonize */
354 frr_config_fork();
355
356 /* apply configuration */
357 thread_add_event(master, ldp_config_fork_apply, NULL, 0, &thread);
358
359 /* setup pipes to children */
360 if ((iev_ldpe = calloc(1, sizeof(struct imsgev))) == NULL ||
361 (iev_ldpe_sync = calloc(1, sizeof(struct imsgev))) == NULL ||
362 (iev_lde = calloc(1, sizeof(struct imsgev))) == NULL ||
363 (iev_lde_sync = calloc(1, sizeof(struct imsgev))) == NULL)
364 fatal(NULL);
365 imsg_init(&iev_ldpe->ibuf, pipe_parent2ldpe[0]);
366 iev_ldpe->handler_read = main_dispatch_ldpe;
367 iev_ldpe->ev_read = NULL;
368 thread_add_read(master, iev_ldpe->handler_read, iev_ldpe, iev_ldpe->ibuf.fd,
369 &iev_ldpe->ev_read);
370 iev_ldpe->handler_write = ldp_write_handler;
371
372 imsg_init(&iev_ldpe_sync->ibuf, pipe_parent2ldpe_sync[0]);
373 iev_ldpe_sync->handler_read = main_dispatch_ldpe;
374 iev_ldpe_sync->ev_read = NULL;
375 thread_add_read(master, iev_ldpe_sync->handler_read, iev_ldpe_sync, iev_ldpe_sync->ibuf.fd,
376 &iev_ldpe_sync->ev_read);
377 iev_ldpe_sync->handler_write = ldp_write_handler;
378
379 imsg_init(&iev_lde->ibuf, pipe_parent2lde[0]);
380 iev_lde->handler_read = main_dispatch_lde;
381 iev_lde->ev_read = NULL;
382 thread_add_read(master, iev_lde->handler_read, iev_lde, iev_lde->ibuf.fd,
383 &iev_lde->ev_read);
384 iev_lde->handler_write = ldp_write_handler;
385
386 imsg_init(&iev_lde_sync->ibuf, pipe_parent2lde_sync[0]);
387 iev_lde_sync->handler_read = main_dispatch_lde;
388 iev_lde_sync->ev_read = NULL;
389 thread_add_read(master, iev_lde_sync->handler_read, iev_lde_sync, iev_lde_sync->ibuf.fd,
390 &iev_lde_sync->ev_read);
391 iev_lde_sync->handler_write = ldp_write_handler;
392
393 if (main_imsg_send_ipc_sockets(&iev_ldpe->ibuf, &iev_lde->ibuf))
394 fatal("could not establish imsg links");
395 main_imsg_compose_both(IMSG_DEBUG_UPDATE, &ldp_debug,
396 sizeof(ldp_debug));
397 main_imsg_compose_both(IMSG_INIT, &init, sizeof(init));
398 main_imsg_send_config(ldpd_conf);
399
400 if (ldpd_conf->ipv4.flags & F_LDPD_AF_ENABLED)
401 main_imsg_send_net_sockets(AF_INET);
402 if (ldpd_conf->ipv6.flags & F_LDPD_AF_ENABLED)
403 main_imsg_send_net_sockets(AF_INET6);
404
405 frr_run(master);
406
407 /* NOTREACHED */
408 return (0);
409 }
410
411 static void
412 ldpd_shutdown(void)
413 {
414 pid_t pid;
415 int status;
416
417 frr_early_fini();
418
419 /* close pipes */
420 msgbuf_clear(&iev_ldpe->ibuf.w);
421 close(iev_ldpe->ibuf.fd);
422 msgbuf_clear(&iev_lde->ibuf.w);
423 close(iev_lde->ibuf.fd);
424
425 config_clear(ldpd_conf);
426
427 ldp_config_reset(vty_conf);
428 QOBJ_UNREG(vty_conf);
429 free(vty_conf);
430
431 log_debug("waiting for children to terminate");
432
433 while (true) {
434 /* Wait for child process. */
435 pid = wait(&status);
436 if (pid == -1) {
437 /* We got interrupted, try again. */
438 if (errno == EINTR)
439 continue;
440 /* No more processes were found. */
441 if (errno != ECHILD)
442 break;
443
444 /* Unhandled errno condition. */
445 fatal("wait");
446 /* UNREACHABLE */
447 }
448
449 /* We found something, lets announce it. */
450 if (WIFSIGNALED(status))
451 log_warnx("%s terminated; signal %d",
452 (pid == lde_pid ? "label decision engine"
453 : "ldp engine"),
454 WTERMSIG(status));
455
456 /* Repeat until there are no more child processes. */
457 }
458
459 free(iev_ldpe);
460 free(iev_lde);
461
462 log_info("terminating");
463
464 vrf_terminate();
465 access_list_reset();
466 ldp_zebra_destroy();
467
468 frr_fini();
469 exit(0);
470 }
471
472 static pid_t
473 start_child(enum ldpd_process p, char *argv0, int fd_async, int fd_sync)
474 {
475 char *argv[3];
476 int argc = 0, nullfd;
477 pid_t pid;
478
479 switch (pid = fork()) {
480 case -1:
481 fatal("cannot fork");
482 case 0:
483 break;
484 default:
485 close(fd_async);
486 close(fd_sync);
487 return (pid);
488 }
489
490 nullfd = open("/dev/null", O_RDONLY | O_NOCTTY);
491 if (nullfd == -1) {
492 flog_err_sys(EC_LIB_SYSTEM_CALL,
493 "%s: failed to open /dev/null: %s", __func__,
494 safe_strerror(errno));
495 } else {
496 dup2(nullfd, 0);
497 dup2(nullfd, 1);
498 dup2(nullfd, 2);
499 close(nullfd);
500 }
501
502 if (dup2(fd_async, LDPD_FD_ASYNC) == -1)
503 fatal("cannot setup imsg async fd");
504 if (dup2(fd_sync, LDPD_FD_SYNC) == -1)
505 fatal("cannot setup imsg sync fd");
506
507 argv[argc++] = argv0;
508 switch (p) {
509 case PROC_MAIN:
510 fatalx("Can not start main process");
511 case PROC_LDE_ENGINE:
512 argv[argc++] = (char *)"-L";
513 break;
514 case PROC_LDP_ENGINE:
515 argv[argc++] = (char *)"-E";
516 break;
517 }
518 argv[argc++] = NULL;
519
520 execvp(argv0, argv);
521 fatal("execvp");
522 }
523
524 /* imsg handling */
525 /* ARGSUSED */
526 static int
527 main_dispatch_ldpe(struct thread *thread)
528 {
529 struct imsgev *iev = THREAD_ARG(thread);
530 struct imsgbuf *ibuf = &iev->ibuf;
531 struct imsg imsg;
532 int af;
533 ssize_t n;
534 int shut = 0;
535
536 iev->ev_read = NULL;
537
538 if ((n = imsg_read(ibuf)) == -1 && errno != EAGAIN)
539 fatal("imsg_read error");
540 if (n == 0) /* connection closed */
541 shut = 1;
542
543 for (;;) {
544 if ((n = imsg_get(ibuf, &imsg)) == -1)
545 fatal("imsg_get");
546
547 if (n == 0)
548 break;
549
550 switch (imsg.hdr.type) {
551 case IMSG_LOG:
552 logit(imsg.hdr.pid, "%s", (const char *)imsg.data);
553 break;
554 case IMSG_REQUEST_SOCKETS:
555 af = imsg.hdr.pid;
556 main_imsg_send_net_sockets(af);
557 break;
558 case IMSG_ACL_CHECK:
559 if (imsg.hdr.len != IMSG_HEADER_SIZE +
560 sizeof(struct acl_check))
561 fatalx("IMSG_ACL_CHECK imsg with wrong len");
562 ldp_acl_reply(iev, (struct acl_check *)imsg.data);
563 break;
564 default:
565 log_debug("%s: error handling imsg %d", __func__,
566 imsg.hdr.type);
567 break;
568 }
569 imsg_free(&imsg);
570 }
571 if (!shut)
572 imsg_event_add(iev);
573 else {
574 /* this pipe is dead, so remove the event handlers and exit */
575 THREAD_READ_OFF(iev->ev_read);
576 THREAD_WRITE_OFF(iev->ev_write);
577 ldpe_pid = 0;
578 if (lde_pid == 0)
579 ldpd_shutdown();
580 else
581 kill(lde_pid, SIGTERM);
582 }
583
584 return (0);
585 }
586
587 /* ARGSUSED */
588 static int
589 main_dispatch_lde(struct thread *thread)
590 {
591 struct imsgev *iev = THREAD_ARG(thread);
592 struct imsgbuf *ibuf = &iev->ibuf;
593 struct imsg imsg;
594 ssize_t n;
595 int shut = 0;
596
597 iev->ev_read = NULL;
598
599 if ((n = imsg_read(ibuf)) == -1 && errno != EAGAIN)
600 fatal("imsg_read error");
601 if (n == 0) /* connection closed */
602 shut = 1;
603
604 for (;;) {
605 if ((n = imsg_get(ibuf, &imsg)) == -1)
606 fatal("imsg_get");
607
608 if (n == 0)
609 break;
610
611 switch (imsg.hdr.type) {
612 case IMSG_LOG:
613 logit(imsg.hdr.pid, "%s", (const char *)imsg.data);
614 break;
615 case IMSG_KLABEL_CHANGE:
616 if (imsg.hdr.len - IMSG_HEADER_SIZE !=
617 sizeof(struct kroute))
618 fatalx("invalid size of IMSG_KLABEL_CHANGE");
619 if (kr_change(imsg.data))
620 log_warnx("%s: error changing route", __func__);
621 break;
622 case IMSG_KLABEL_DELETE:
623 if (imsg.hdr.len - IMSG_HEADER_SIZE !=
624 sizeof(struct kroute))
625 fatalx("invalid size of IMSG_KLABEL_DELETE");
626 if (kr_delete(imsg.data))
627 log_warnx("%s: error deleting route", __func__);
628 break;
629 case IMSG_KPW_ADD:
630 case IMSG_KPW_DELETE:
631 case IMSG_KPW_SET:
632 case IMSG_KPW_UNSET:
633 if (imsg.hdr.len - IMSG_HEADER_SIZE !=
634 sizeof(struct zapi_pw))
635 fatalx("invalid size of IMSG_KPWLABEL_CHANGE");
636
637 switch (imsg.hdr.type) {
638 case IMSG_KPW_ADD:
639 if (kmpw_add(imsg.data))
640 log_warnx("%s: error adding "
641 "pseudowire", __func__);
642 break;
643 case IMSG_KPW_DELETE:
644 if (kmpw_del(imsg.data))
645 log_warnx("%s: error deleting "
646 "pseudowire", __func__);
647 break;
648 case IMSG_KPW_SET:
649 if (kmpw_set(imsg.data))
650 log_warnx("%s: error setting "
651 "pseudowire", __func__);
652 break;
653 case IMSG_KPW_UNSET:
654 if (kmpw_unset(imsg.data))
655 log_warnx("%s: error unsetting "
656 "pseudowire", __func__);
657 break;
658 }
659 break;
660 case IMSG_ACL_CHECK:
661 if (imsg.hdr.len != IMSG_HEADER_SIZE +
662 sizeof(struct acl_check))
663 fatalx("IMSG_ACL_CHECK imsg with wrong len");
664 ldp_acl_reply(iev, (struct acl_check *)imsg.data);
665 break;
666 default:
667 log_debug("%s: error handling imsg %d", __func__,
668 imsg.hdr.type);
669 break;
670 }
671 imsg_free(&imsg);
672 }
673 if (!shut)
674 imsg_event_add(iev);
675 else {
676 /* this pipe is dead, so remove the event handlers and exit */
677 THREAD_READ_OFF(iev->ev_read);
678 THREAD_WRITE_OFF(iev->ev_write);
679 lde_pid = 0;
680 if (ldpe_pid == 0)
681 ldpd_shutdown();
682 else
683 kill(ldpe_pid, SIGTERM);
684 }
685
686 return (0);
687 }
688
689 /* ARGSUSED */
690 int
691 ldp_write_handler(struct thread *thread)
692 {
693 struct imsgev *iev = THREAD_ARG(thread);
694 struct imsgbuf *ibuf = &iev->ibuf;
695 ssize_t n;
696
697 iev->ev_write = NULL;
698
699 if ((n = msgbuf_write(&ibuf->w)) == -1 && errno != EAGAIN)
700 fatal("msgbuf_write");
701 if (n == 0) {
702 /* this pipe is dead, so remove the event handlers */
703 THREAD_READ_OFF(iev->ev_read);
704 THREAD_WRITE_OFF(iev->ev_write);
705 return (0);
706 }
707
708 imsg_event_add(iev);
709
710 return (0);
711 }
712
713 void
714 main_imsg_compose_ldpe(int type, pid_t pid, void *data, uint16_t datalen)
715 {
716 if (iev_ldpe == NULL)
717 return;
718 imsg_compose_event(iev_ldpe, type, 0, pid, -1, data, datalen);
719 }
720
721 void
722 main_imsg_compose_lde(int type, pid_t pid, void *data, uint16_t datalen)
723 {
724 imsg_compose_event(iev_lde, type, 0, pid, -1, data, datalen);
725 }
726
727 int
728 main_imsg_compose_both(enum imsg_type type, void *buf, uint16_t len)
729 {
730 if (iev_ldpe == NULL || iev_lde == NULL)
731 return (0);
732 if (imsg_compose_event(iev_ldpe, type, 0, 0, -1, buf, len) == -1)
733 return (-1);
734 if (imsg_compose_event(iev_lde, type, 0, 0, -1, buf, len) == -1)
735 return (-1);
736 return (0);
737 }
738
739 void
740 imsg_event_add(struct imsgev *iev)
741 {
742 if (iev->handler_read)
743 thread_add_read(master, iev->handler_read, iev, iev->ibuf.fd,
744 &iev->ev_read);
745
746 if (iev->handler_write && iev->ibuf.w.queued)
747 thread_add_write(master, iev->handler_write, iev,
748 iev->ibuf.fd, &iev->ev_write);
749 }
750
751 int
752 imsg_compose_event(struct imsgev *iev, uint16_t type, uint32_t peerid,
753 pid_t pid, int fd, void *data, uint16_t datalen)
754 {
755 int ret;
756
757 if ((ret = imsg_compose(&iev->ibuf, type, peerid,
758 pid, fd, data, datalen)) != -1)
759 imsg_event_add(iev);
760 return (ret);
761 }
762
763 void
764 evbuf_enqueue(struct evbuf *eb, struct ibuf *buf)
765 {
766 ibuf_close(&eb->wbuf, buf);
767 evbuf_event_add(eb);
768 }
769
770 void
771 evbuf_event_add(struct evbuf *eb)
772 {
773 if (eb->wbuf.queued)
774 thread_add_write(master, eb->handler, eb->arg, eb->wbuf.fd,
775 &eb->ev);
776 }
777
778 void
779 evbuf_init(struct evbuf *eb, int fd, int (*handler)(struct thread *),
780 void *arg)
781 {
782 msgbuf_init(&eb->wbuf);
783 eb->wbuf.fd = fd;
784 eb->handler = handler;
785 eb->arg = arg;
786 }
787
788 void
789 evbuf_clear(struct evbuf *eb)
790 {
791 THREAD_WRITE_OFF(eb->ev);
792 msgbuf_clear(&eb->wbuf);
793 eb->wbuf.fd = -1;
794 }
795
796 static int
797 main_imsg_send_ipc_sockets(struct imsgbuf *ldpe_buf, struct imsgbuf *lde_buf)
798 {
799 int pipe_ldpe2lde[2];
800
801 if (socketpair(AF_UNIX, SOCK_STREAM, PF_UNSPEC, pipe_ldpe2lde) == -1)
802 return (-1);
803 sock_set_nonblock(pipe_ldpe2lde[0]);
804 sock_set_nonblock(pipe_ldpe2lde[1]);
805
806 if (imsg_compose(ldpe_buf, IMSG_SOCKET_IPC, 0, 0, pipe_ldpe2lde[0],
807 NULL, 0) == -1)
808 return (-1);
809 if (imsg_compose(lde_buf, IMSG_SOCKET_IPC, 0, 0, pipe_ldpe2lde[1],
810 NULL, 0) == -1)
811 return (-1);
812
813 return (0);
814 }
815
816 static void
817 main_imsg_send_net_sockets(int af)
818 {
819 if (!ldp_addrisset(af, &(ldp_af_conf_get(ldpd_conf, af))->trans_addr))
820 return;
821
822 main_imsg_send_net_socket(af, LDP_SOCKET_DISC);
823 main_imsg_send_net_socket(af, LDP_SOCKET_EDISC);
824 main_imsg_send_net_socket(af, LDP_SOCKET_SESSION);
825 imsg_compose_event(iev_ldpe, IMSG_SETUP_SOCKETS, af, 0, -1, NULL, 0);
826 }
827
828 static void
829 main_imsg_send_net_socket(int af, enum socket_type type)
830 {
831 int fd;
832
833 fd = ldp_create_socket(af, type);
834 if (fd == -1) {
835 log_warnx("%s: failed to create %s socket for address-family "
836 "%s", __func__, socket_name(type), af_name(af));
837 return;
838 }
839
840 imsg_compose_event(iev_ldpe, IMSG_SOCKET_NET, af, 0, fd, &type,
841 sizeof(type));
842 }
843
844 int
845 ldp_acl_request(struct imsgev *iev, char *acl_name, int af,
846 union ldpd_addr *addr, uint8_t prefixlen)
847 {
848 struct imsg imsg;
849 ssize_t n;
850 struct acl_check acl_check;
851
852 if (acl_name[0] == '\0')
853 return FILTER_PERMIT;
854
855 /* build request */
856 strlcpy(acl_check.acl, acl_name, sizeof(acl_check.acl));
857 acl_check.af = af;
858 acl_check.addr = *addr;
859 acl_check.prefixlen = prefixlen;
860
861 /* send (blocking) */
862 imsg_compose_event(iev, IMSG_ACL_CHECK, 0, 0, -1, &acl_check,
863 sizeof(acl_check));
864 imsg_flush(&iev->ibuf);
865
866 /* receive (blocking) and parse result */
867 if ((n = imsg_read(&iev->ibuf)) == -1)
868 fatal("imsg_read error");
869 if ((n = imsg_get(&iev->ibuf, &imsg)) == -1)
870 fatal("imsg_get");
871 if (imsg.hdr.type != IMSG_ACL_CHECK ||
872 imsg.hdr.len != IMSG_HEADER_SIZE + sizeof(int))
873 fatalx("ldp_acl_request: invalid response");
874
875 return (*((int *)imsg.data));
876 }
877
878 void
879 ldp_acl_reply(struct imsgev *iev, struct acl_check *acl_check)
880 {
881 struct access_list *alist;
882 struct prefix prefix;
883 int result;
884
885 alist = access_list_lookup(family2afi(acl_check->af), acl_check->acl);
886 if (alist == NULL)
887 result = FILTER_DENY;
888 else {
889 prefix.family = acl_check->af;
890 switch (prefix.family) {
891 case AF_INET:
892 prefix.u.prefix4 = acl_check->addr.v4;
893 break;
894 case AF_INET6:
895 prefix.u.prefix6 = acl_check->addr.v6;
896 break;
897 default:
898 fatalx("ldp_acl_reply: unknown af");
899 }
900 prefix.prefixlen = acl_check->prefixlen;
901 result = access_list_apply(alist, &prefix);
902 }
903
904 imsg_compose_event(iev, IMSG_ACL_CHECK, 0, 0, -1, &result,
905 sizeof(result));
906 }
907
908 struct ldpd_af_conf *
909 ldp_af_conf_get(struct ldpd_conf *xconf, int af)
910 {
911 switch (af) {
912 case AF_INET:
913 return (&xconf->ipv4);
914 case AF_INET6:
915 return (&xconf->ipv6);
916 default:
917 fatalx("ldp_af_conf_get: unknown af");
918 }
919 }
920
921 struct ldpd_af_global *
922 ldp_af_global_get(struct ldpd_global *xglobal, int af)
923 {
924 switch (af) {
925 case AF_INET:
926 return (&xglobal->ipv4);
927 case AF_INET6:
928 return (&xglobal->ipv6);
929 default:
930 fatalx("ldp_af_global_get: unknown af");
931 }
932 }
933
934 int
935 ldp_is_dual_stack(struct ldpd_conf *xconf)
936 {
937 return ((xconf->ipv4.flags & F_LDPD_AF_ENABLED) &&
938 (xconf->ipv6.flags & F_LDPD_AF_ENABLED));
939 }
940
941 in_addr_t
942 ldp_rtr_id_get(struct ldpd_conf *xconf)
943 {
944 if (xconf->rtr_id.s_addr != INADDR_ANY)
945 return (xconf->rtr_id.s_addr);
946 else
947 return (global.rtr_id.s_addr);
948 }
949
950 static int
951 main_imsg_send_config(struct ldpd_conf *xconf)
952 {
953 struct iface *iface;
954 struct tnbr *tnbr;
955 struct nbr_params *nbrp;
956 struct l2vpn *l2vpn;
957 struct l2vpn_if *lif;
958 struct l2vpn_pw *pw;
959
960 if (main_imsg_compose_both(IMSG_RECONF_CONF, xconf,
961 sizeof(*xconf)) == -1)
962 return (-1);
963
964 RB_FOREACH(iface, iface_head, &xconf->iface_tree) {
965 if (main_imsg_compose_both(IMSG_RECONF_IFACE, iface,
966 sizeof(*iface)) == -1)
967 return (-1);
968 }
969
970 RB_FOREACH(tnbr, tnbr_head, &xconf->tnbr_tree) {
971 if (main_imsg_compose_both(IMSG_RECONF_TNBR, tnbr,
972 sizeof(*tnbr)) == -1)
973 return (-1);
974 }
975
976 RB_FOREACH(nbrp, nbrp_head, &xconf->nbrp_tree) {
977 if (main_imsg_compose_both(IMSG_RECONF_NBRP, nbrp,
978 sizeof(*nbrp)) == -1)
979 return (-1);
980 }
981
982 RB_FOREACH(l2vpn, l2vpn_head, &xconf->l2vpn_tree) {
983 if (main_imsg_compose_both(IMSG_RECONF_L2VPN, l2vpn,
984 sizeof(*l2vpn)) == -1)
985 return (-1);
986
987 RB_FOREACH(lif, l2vpn_if_head, &l2vpn->if_tree) {
988 if (main_imsg_compose_both(IMSG_RECONF_L2VPN_IF, lif,
989 sizeof(*lif)) == -1)
990 return (-1);
991 }
992 RB_FOREACH(pw, l2vpn_pw_head, &l2vpn->pw_tree) {
993 if (main_imsg_compose_both(IMSG_RECONF_L2VPN_PW, pw,
994 sizeof(*pw)) == -1)
995 return (-1);
996 }
997 RB_FOREACH(pw, l2vpn_pw_head, &l2vpn->pw_inactive_tree) {
998 if (main_imsg_compose_both(IMSG_RECONF_L2VPN_IPW, pw,
999 sizeof(*pw)) == -1)
1000 return (-1);
1001 }
1002 }
1003
1004 if (main_imsg_compose_both(IMSG_RECONF_END, NULL, 0) == -1)
1005 return (-1);
1006
1007 return (0);
1008 }
1009
1010 int
1011 ldp_config_apply(struct vty *vty, struct ldpd_conf *xconf)
1012 {
1013 /*
1014 * When reading from a configuration file (startup and sighup), we
1015 * call merge_config() only once after the whole config has been read.
1016 * This is the optimal and least disruptive way to update the running
1017 * configuration.
1018 */
1019 if (vty && vty->type == VTY_FILE)
1020 return (0);
1021
1022 ldp_config_normalize(xconf);
1023
1024 if (main_imsg_send_config(xconf) == -1)
1025 return (-1);
1026
1027 merge_config(ldpd_conf, xconf);
1028
1029 return (0);
1030 }
1031
1032 static void
1033 ldp_config_normalize(struct ldpd_conf *xconf)
1034 {
1035 struct iface *iface, *itmp;
1036 struct nbr_params *nbrp, *ntmp;
1037 struct l2vpn *l2vpn;
1038 struct l2vpn_pw *pw, *ptmp;
1039
1040 if (!(xconf->flags & F_LDPD_ENABLED))
1041 ldp_config_reset_main(xconf);
1042 else {
1043 if (!(xconf->ipv4.flags & F_LDPD_AF_ENABLED))
1044 ldp_config_reset_af(xconf, AF_INET);
1045 if (!(xconf->ipv6.flags & F_LDPD_AF_ENABLED))
1046 ldp_config_reset_af(xconf, AF_INET6);
1047
1048 RB_FOREACH_SAFE(iface, iface_head, &xconf->iface_tree, itmp) {
1049 if (iface->ipv4.enabled || iface->ipv6.enabled)
1050 continue;
1051
1052 QOBJ_UNREG(iface);
1053 RB_REMOVE(iface_head, &vty_conf->iface_tree, iface);
1054 free(iface);
1055 }
1056
1057 RB_FOREACH_SAFE(nbrp, nbrp_head, &xconf->nbrp_tree, ntmp) {
1058 if (nbrp->flags & (F_NBRP_KEEPALIVE|F_NBRP_GTSM))
1059 continue;
1060 if (nbrp->auth.method != AUTH_NONE)
1061 continue;
1062
1063 QOBJ_UNREG(nbrp);
1064 RB_REMOVE(nbrp_head, &vty_conf->nbrp_tree, nbrp);
1065 free(nbrp);
1066 }
1067 }
1068
1069 RB_FOREACH(l2vpn, l2vpn_head, &xconf->l2vpn_tree) {
1070 RB_FOREACH_SAFE(pw, l2vpn_pw_head, &l2vpn->pw_tree, ptmp) {
1071 if (!(pw->flags & F_PW_STATIC_NBR_ADDR)) {
1072 pw->af = AF_INET;
1073 pw->addr.v4 = pw->lsr_id;
1074 }
1075
1076 if (pw->lsr_id.s_addr != INADDR_ANY && pw->pwid != 0)
1077 continue;
1078 RB_REMOVE(l2vpn_pw_head, &l2vpn->pw_tree, pw);
1079 RB_INSERT(l2vpn_pw_head, &l2vpn->pw_inactive_tree, pw);
1080 }
1081 RB_FOREACH_SAFE(pw, l2vpn_pw_head, &l2vpn->pw_inactive_tree,
1082 ptmp) {
1083 if (!(pw->flags & F_PW_STATIC_NBR_ADDR)) {
1084 pw->af = AF_INET;
1085 pw->addr.v4 = pw->lsr_id;
1086 }
1087
1088 if (pw->lsr_id.s_addr == INADDR_ANY || pw->pwid == 0)
1089 continue;
1090 RB_REMOVE(l2vpn_pw_head, &l2vpn->pw_inactive_tree, pw);
1091 RB_INSERT(l2vpn_pw_head, &l2vpn->pw_tree, pw);
1092 }
1093 }
1094 }
1095
1096 static void
1097 ldp_config_reset(struct ldpd_conf *conf)
1098 {
1099 ldp_config_reset_main(conf);
1100 ldp_config_reset_l2vpns(conf);
1101 }
1102
1103 static void
1104 ldp_config_reset_main(struct ldpd_conf *conf)
1105 {
1106 struct iface *iface;
1107 struct nbr_params *nbrp;
1108
1109 while (!RB_EMPTY(iface_head, &conf->iface_tree)) {
1110 iface = RB_ROOT(iface_head, &conf->iface_tree);
1111
1112 QOBJ_UNREG(iface);
1113 RB_REMOVE(iface_head, &conf->iface_tree, iface);
1114 free(iface);
1115 }
1116
1117 while (!RB_EMPTY(nbrp_head, &conf->nbrp_tree)) {
1118 nbrp = RB_ROOT(nbrp_head, &conf->nbrp_tree);
1119
1120 QOBJ_UNREG(nbrp);
1121 RB_REMOVE(nbrp_head, &conf->nbrp_tree, nbrp);
1122 free(nbrp);
1123 }
1124
1125 conf->rtr_id.s_addr = INADDR_ANY;
1126 ldp_config_reset_af(conf, AF_INET);
1127 ldp_config_reset_af(conf, AF_INET6);
1128 conf->lhello_holdtime = LINK_DFLT_HOLDTIME;
1129 conf->lhello_interval = DEFAULT_HELLO_INTERVAL;
1130 conf->thello_holdtime = TARGETED_DFLT_HOLDTIME;
1131 conf->thello_interval = DEFAULT_HELLO_INTERVAL;
1132 conf->trans_pref = DUAL_STACK_LDPOV6;
1133 conf->flags = 0;
1134 }
1135
1136 static void
1137 ldp_config_reset_af(struct ldpd_conf *conf, int af)
1138 {
1139 struct ldpd_af_conf *af_conf;
1140 struct iface *iface;
1141 struct iface_af *ia;
1142 struct tnbr *tnbr, *ttmp;
1143
1144 RB_FOREACH(iface, iface_head, &conf->iface_tree) {
1145 ia = iface_af_get(iface, af);
1146 ia->enabled = 0;
1147 }
1148
1149 RB_FOREACH_SAFE(tnbr, tnbr_head, &conf->tnbr_tree, ttmp) {
1150 if (tnbr->af != af)
1151 continue;
1152
1153 QOBJ_UNREG(tnbr);
1154 RB_REMOVE(tnbr_head, &conf->tnbr_tree, tnbr);
1155 free(tnbr);
1156 }
1157
1158 af_conf = ldp_af_conf_get(conf, af);
1159 af_conf->keepalive = 180;
1160 af_conf->lhello_holdtime = 0;
1161 af_conf->lhello_interval = 0;
1162 af_conf->thello_holdtime = 0;
1163 af_conf->thello_interval = 0;
1164 memset(&af_conf->trans_addr, 0, sizeof(af_conf->trans_addr));
1165 af_conf->flags = 0;
1166 }
1167
1168 static void
1169 ldp_config_reset_l2vpns(struct ldpd_conf *conf)
1170 {
1171 struct l2vpn *l2vpn;
1172 struct l2vpn_if *lif;
1173 struct l2vpn_pw *pw;
1174
1175 while (!RB_EMPTY(l2vpn_head, &conf->l2vpn_tree)) {
1176 l2vpn = RB_ROOT(l2vpn_head, &conf->l2vpn_tree);
1177 while (!RB_EMPTY(l2vpn_if_head, &l2vpn->if_tree)) {
1178 lif = RB_ROOT(l2vpn_if_head, &l2vpn->if_tree);
1179
1180 QOBJ_UNREG(lif);
1181 RB_REMOVE(l2vpn_if_head, &l2vpn->if_tree, lif);
1182 free(lif);
1183 }
1184 while (!RB_EMPTY(l2vpn_pw_head, &l2vpn->pw_tree)) {
1185 pw = RB_ROOT(l2vpn_pw_head, &l2vpn->pw_tree);
1186
1187 QOBJ_UNREG(pw);
1188 RB_REMOVE(l2vpn_pw_head, &l2vpn->pw_tree, pw);
1189 free(pw);
1190 }
1191 while (!RB_EMPTY(l2vpn_pw_head, &l2vpn->pw_inactive_tree)) {
1192 pw = RB_ROOT(l2vpn_pw_head, &l2vpn->pw_inactive_tree);
1193
1194 QOBJ_UNREG(pw);
1195 RB_REMOVE(l2vpn_pw_head, &l2vpn->pw_inactive_tree, pw);
1196 free(pw);
1197 }
1198 QOBJ_UNREG(l2vpn);
1199 RB_REMOVE(l2vpn_head, &conf->l2vpn_tree, l2vpn);
1200 free(l2vpn);
1201 }
1202 }
1203
1204 void
1205 ldp_clear_config(struct ldpd_conf *xconf)
1206 {
1207 struct iface *iface;
1208 struct tnbr *tnbr;
1209 struct nbr_params *nbrp;
1210 struct l2vpn *l2vpn;
1211
1212 while (!RB_EMPTY(iface_head, &xconf->iface_tree)) {
1213 iface = RB_ROOT(iface_head, &xconf->iface_tree);
1214
1215 RB_REMOVE(iface_head, &xconf->iface_tree, iface);
1216 free(iface);
1217 }
1218 while (!RB_EMPTY(tnbr_head, &xconf->tnbr_tree)) {
1219 tnbr = RB_ROOT(tnbr_head, &xconf->tnbr_tree);
1220
1221 RB_REMOVE(tnbr_head, &xconf->tnbr_tree, tnbr);
1222 free(tnbr);
1223 }
1224 while (!RB_EMPTY(nbrp_head, &xconf->nbrp_tree)) {
1225 nbrp = RB_ROOT(nbrp_head, &xconf->nbrp_tree);
1226
1227 RB_REMOVE(nbrp_head, &xconf->nbrp_tree, nbrp);
1228 free(nbrp);
1229 }
1230 while (!RB_EMPTY(l2vpn_head, &xconf->l2vpn_tree)) {
1231 l2vpn = RB_ROOT(l2vpn_head, &xconf->l2vpn_tree);
1232
1233 RB_REMOVE(l2vpn_head, &xconf->l2vpn_tree, l2vpn);
1234 l2vpn_del(l2vpn);
1235 }
1236
1237 free(xconf);
1238 }
1239
1240 #define COPY(a, b) do { \
1241 a = malloc(sizeof(*a)); \
1242 if (a == NULL) \
1243 fatal(__func__); \
1244 *a = *b; \
1245 } while (0)
1246
1247 void
1248 merge_config(struct ldpd_conf *conf, struct ldpd_conf *xconf)
1249 {
1250 merge_global(conf, xconf);
1251 merge_af(AF_INET, &conf->ipv4, &xconf->ipv4);
1252 merge_af(AF_INET6, &conf->ipv6, &xconf->ipv6);
1253 merge_ifaces(conf, xconf);
1254 merge_tnbrs(conf, xconf);
1255 merge_nbrps(conf, xconf);
1256 merge_l2vpns(conf, xconf);
1257 }
1258
1259 static void
1260 merge_global(struct ldpd_conf *conf, struct ldpd_conf *xconf)
1261 {
1262 /* change of router-id requires resetting all neighborships */
1263 if (conf->rtr_id.s_addr != xconf->rtr_id.s_addr) {
1264 if (ldpd_process == PROC_LDP_ENGINE) {
1265 ldpe_reset_nbrs(AF_UNSPEC);
1266 if (conf->rtr_id.s_addr == INADDR_ANY ||
1267 xconf->rtr_id.s_addr == INADDR_ANY) {
1268 if_update_all(AF_UNSPEC);
1269 tnbr_update_all(AF_UNSPEC);
1270 }
1271 }
1272 conf->rtr_id = xconf->rtr_id;
1273 }
1274
1275 conf->lhello_holdtime = xconf->lhello_holdtime;
1276 conf->lhello_interval = xconf->lhello_interval;
1277 conf->thello_holdtime = xconf->thello_holdtime;
1278 conf->thello_interval = xconf->thello_interval;
1279
1280 if (conf->trans_pref != xconf->trans_pref) {
1281 if (ldpd_process == PROC_LDP_ENGINE)
1282 ldpe_reset_ds_nbrs();
1283 conf->trans_pref = xconf->trans_pref;
1284 }
1285
1286 if ((conf->flags & F_LDPD_DS_CISCO_INTEROP) !=
1287 (xconf->flags & F_LDPD_DS_CISCO_INTEROP)) {
1288 if (ldpd_process == PROC_LDP_ENGINE)
1289 ldpe_reset_ds_nbrs();
1290 }
1291
1292 conf->flags = xconf->flags;
1293 }
1294
1295 static void
1296 merge_af(int af, struct ldpd_af_conf *af_conf, struct ldpd_af_conf *xa)
1297 {
1298 int stop_init_backoff = 0;
1299 int remove_dynamic_tnbrs = 0;
1300 int change_egress_label = 0;
1301 int reset_nbrs_ipv4 = 0;
1302 int reset_nbrs = 0;
1303 int update_sockets = 0;
1304
1305 /* update timers */
1306 if (af_conf->keepalive != xa->keepalive) {
1307 af_conf->keepalive = xa->keepalive;
1308 stop_init_backoff = 1;
1309 }
1310 af_conf->lhello_holdtime = xa->lhello_holdtime;
1311 af_conf->lhello_interval = xa->lhello_interval;
1312 af_conf->thello_holdtime = xa->thello_holdtime;
1313 af_conf->thello_interval = xa->thello_interval;
1314
1315 /* update flags */
1316 if ((af_conf->flags & F_LDPD_AF_THELLO_ACCEPT) &&
1317 !(xa->flags & F_LDPD_AF_THELLO_ACCEPT))
1318 remove_dynamic_tnbrs = 1;
1319 if ((af_conf->flags & F_LDPD_AF_NO_GTSM) !=
1320 (xa->flags & F_LDPD_AF_NO_GTSM)) {
1321 if (af == AF_INET6)
1322 /* need to set/unset IPV6_MINHOPCOUNT */
1323 update_sockets = 1;
1324 else
1325 /* for LDPv4 just resetting the neighbors is enough */
1326 reset_nbrs_ipv4 = 1;
1327 }
1328 if ((af_conf->flags & F_LDPD_AF_EXPNULL) !=
1329 (xa->flags & F_LDPD_AF_EXPNULL))
1330 change_egress_label = 1;
1331 af_conf->flags = xa->flags;
1332
1333 /* update the transport address */
1334 if (ldp_addrcmp(af, &af_conf->trans_addr, &xa->trans_addr)) {
1335 af_conf->trans_addr = xa->trans_addr;
1336 update_sockets = 1;
1337 }
1338
1339 /* update ACLs */
1340 if (strcmp(af_conf->acl_label_advertise_to,
1341 xa->acl_label_advertise_to) ||
1342 strcmp(af_conf->acl_label_advertise_for,
1343 xa->acl_label_advertise_for) ||
1344 strcmp(af_conf->acl_label_accept_from,
1345 xa->acl_label_accept_from) ||
1346 strcmp(af_conf->acl_label_accept_for,
1347 xa->acl_label_accept_for))
1348 reset_nbrs = 1;
1349 if (strcmp(af_conf->acl_thello_accept_from, xa->acl_thello_accept_from))
1350 remove_dynamic_tnbrs = 1;
1351 if (strcmp(af_conf->acl_label_expnull_for, xa->acl_label_expnull_for))
1352 change_egress_label = 1;
1353 strlcpy(af_conf->acl_thello_accept_from, xa->acl_thello_accept_from,
1354 sizeof(af_conf->acl_thello_accept_from));
1355 strlcpy(af_conf->acl_label_allocate_for, xa->acl_label_allocate_for,
1356 sizeof(af_conf->acl_label_allocate_for));
1357 strlcpy(af_conf->acl_label_advertise_to, xa->acl_label_advertise_to,
1358 sizeof(af_conf->acl_label_advertise_to));
1359 strlcpy(af_conf->acl_label_advertise_for, xa->acl_label_advertise_for,
1360 sizeof(af_conf->acl_label_advertise_for));
1361 strlcpy(af_conf->acl_label_accept_from, xa->acl_label_accept_from,
1362 sizeof(af_conf->acl_label_accept_from));
1363 strlcpy(af_conf->acl_label_accept_for, xa->acl_label_accept_for,
1364 sizeof(af_conf->acl_label_accept_for));
1365 strlcpy(af_conf->acl_label_expnull_for, xa->acl_label_expnull_for,
1366 sizeof(af_conf->acl_label_expnull_for));
1367
1368 /* apply the new configuration */
1369 switch (ldpd_process) {
1370 case PROC_LDE_ENGINE:
1371 if (change_egress_label)
1372 lde_change_egress_label(af);
1373 break;
1374 case PROC_LDP_ENGINE:
1375 if (stop_init_backoff)
1376 ldpe_stop_init_backoff(af);
1377 if (remove_dynamic_tnbrs)
1378 ldpe_remove_dynamic_tnbrs(af);
1379 if (reset_nbrs)
1380 ldpe_reset_nbrs(AF_UNSPEC);
1381 else if (reset_nbrs_ipv4)
1382 ldpe_reset_nbrs(AF_INET);
1383 break;
1384 case PROC_MAIN:
1385 if (update_sockets && iev_ldpe)
1386 imsg_compose_event(iev_ldpe, IMSG_CLOSE_SOCKETS, af,
1387 0, -1, NULL, 0);
1388 break;
1389 }
1390 }
1391
1392 static void
1393 merge_ifaces(struct ldpd_conf *conf, struct ldpd_conf *xconf)
1394 {
1395 struct iface *iface, *itmp, *xi;
1396
1397 RB_FOREACH_SAFE(iface, iface_head, &conf->iface_tree, itmp) {
1398 /* find deleted interfaces */
1399 if ((xi = if_lookup_name(xconf, iface->name)) == NULL) {
1400 switch (ldpd_process) {
1401 case PROC_LDP_ENGINE:
1402 ldpe_if_exit(iface);
1403 break;
1404 case PROC_LDE_ENGINE:
1405 case PROC_MAIN:
1406 break;
1407 }
1408 RB_REMOVE(iface_head, &conf->iface_tree, iface);
1409 free(iface);
1410 }
1411 }
1412 RB_FOREACH_SAFE(xi, iface_head, &xconf->iface_tree, itmp) {
1413 /* find new interfaces */
1414 if ((iface = if_lookup_name(conf, xi->name)) == NULL) {
1415 COPY(iface, xi);
1416 RB_INSERT(iface_head, &conf->iface_tree, iface);
1417
1418 switch (ldpd_process) {
1419 case PROC_LDP_ENGINE:
1420 ldpe_if_init(iface);
1421 break;
1422 case PROC_LDE_ENGINE:
1423 break;
1424 case PROC_MAIN:
1425 /* resend addresses to activate new interfaces */
1426 kif_redistribute(iface->name);
1427 break;
1428 }
1429 continue;
1430 }
1431
1432 /* update existing interfaces */
1433 merge_iface_af(&iface->ipv4, &xi->ipv4);
1434 merge_iface_af(&iface->ipv6, &xi->ipv6);
1435 }
1436 }
1437
1438 static void
1439 merge_iface_af(struct iface_af *ia, struct iface_af *xi)
1440 {
1441 if (ia->enabled != xi->enabled) {
1442 ia->enabled = xi->enabled;
1443 if (ldpd_process == PROC_LDP_ENGINE)
1444 ldp_if_update(ia->iface, ia->af);
1445 }
1446 ia->hello_holdtime = xi->hello_holdtime;
1447 ia->hello_interval = xi->hello_interval;
1448 }
1449
1450 static void
1451 merge_tnbrs(struct ldpd_conf *conf, struct ldpd_conf *xconf)
1452 {
1453 struct tnbr *tnbr, *ttmp, *xt;
1454
1455 RB_FOREACH_SAFE(tnbr, tnbr_head, &conf->tnbr_tree, ttmp) {
1456 if (!(tnbr->flags & F_TNBR_CONFIGURED))
1457 continue;
1458
1459 /* find deleted tnbrs */
1460 if ((xt = tnbr_find(xconf, tnbr->af, &tnbr->addr)) == NULL) {
1461 switch (ldpd_process) {
1462 case PROC_LDP_ENGINE:
1463 tnbr->flags &= ~F_TNBR_CONFIGURED;
1464 tnbr_check(conf, tnbr);
1465 break;
1466 case PROC_LDE_ENGINE:
1467 case PROC_MAIN:
1468 RB_REMOVE(tnbr_head, &conf->tnbr_tree, tnbr);
1469 free(tnbr);
1470 break;
1471 }
1472 }
1473 }
1474 RB_FOREACH_SAFE(xt, tnbr_head, &xconf->tnbr_tree, ttmp) {
1475 /* find new tnbrs */
1476 if ((tnbr = tnbr_find(conf, xt->af, &xt->addr)) == NULL) {
1477 COPY(tnbr, xt);
1478 RB_INSERT(tnbr_head, &conf->tnbr_tree, tnbr);
1479
1480 switch (ldpd_process) {
1481 case PROC_LDP_ENGINE:
1482 tnbr_update(tnbr);
1483 break;
1484 case PROC_LDE_ENGINE:
1485 case PROC_MAIN:
1486 break;
1487 }
1488 continue;
1489 }
1490
1491 /* update existing tnbrs */
1492 if (!(tnbr->flags & F_TNBR_CONFIGURED))
1493 tnbr->flags |= F_TNBR_CONFIGURED;
1494 }
1495 }
1496
1497 static void
1498 merge_nbrps(struct ldpd_conf *conf, struct ldpd_conf *xconf)
1499 {
1500 struct nbr_params *nbrp, *ntmp, *xn;
1501 struct nbr *nbr;
1502 int nbrp_changed;
1503
1504 RB_FOREACH_SAFE(nbrp, nbrp_head, &conf->nbrp_tree, ntmp) {
1505 /* find deleted nbrps */
1506 if ((xn = nbr_params_find(xconf, nbrp->lsr_id)) == NULL) {
1507 switch (ldpd_process) {
1508 case PROC_LDP_ENGINE:
1509 nbr = nbr_find_ldpid(nbrp->lsr_id.s_addr);
1510 if (nbr) {
1511 session_shutdown(nbr, S_SHUTDOWN, 0, 0);
1512 #ifdef __OpenBSD__
1513 pfkey_remove(nbr);
1514 #else
1515 sock_set_md5sig(
1516 (ldp_af_global_get(&global,
1517 nbr->af))->ldp_session_socket,
1518 nbr->af, &nbr->raddr, NULL);
1519 #endif
1520 nbr->auth.method = AUTH_NONE;
1521 if (nbr_session_active_role(nbr))
1522 nbr_establish_connection(nbr);
1523 }
1524 break;
1525 case PROC_LDE_ENGINE:
1526 case PROC_MAIN:
1527 break;
1528 }
1529 RB_REMOVE(nbrp_head, &conf->nbrp_tree, nbrp);
1530 free(nbrp);
1531 }
1532 }
1533 RB_FOREACH_SAFE(xn, nbrp_head, &xconf->nbrp_tree, ntmp) {
1534 /* find new nbrps */
1535 if ((nbrp = nbr_params_find(conf, xn->lsr_id)) == NULL) {
1536 COPY(nbrp, xn);
1537 RB_INSERT(nbrp_head, &conf->nbrp_tree, nbrp);
1538
1539 switch (ldpd_process) {
1540 case PROC_LDP_ENGINE:
1541 nbr = nbr_find_ldpid(nbrp->lsr_id.s_addr);
1542 if (nbr) {
1543 session_shutdown(nbr, S_SHUTDOWN, 0, 0);
1544 nbr->auth.method = nbrp->auth.method;
1545 #ifdef __OpenBSD__
1546 if (pfkey_establish(nbr, nbrp) == -1)
1547 fatalx("pfkey setup failed");
1548 #else
1549 sock_set_md5sig(
1550 (ldp_af_global_get(&global,
1551 nbr->af))->ldp_session_socket,
1552 nbr->af, &nbr->raddr,
1553 nbrp->auth.md5key);
1554 #endif
1555 if (nbr_session_active_role(nbr))
1556 nbr_establish_connection(nbr);
1557 }
1558 break;
1559 case PROC_LDE_ENGINE:
1560 case PROC_MAIN:
1561 break;
1562 }
1563 continue;
1564 }
1565
1566 /* update existing nbrps */
1567 if (nbrp->flags != xn->flags ||
1568 nbrp->keepalive != xn->keepalive ||
1569 nbrp->gtsm_enabled != xn->gtsm_enabled ||
1570 nbrp->gtsm_hops != xn->gtsm_hops ||
1571 nbrp->auth.method != xn->auth.method ||
1572 strcmp(nbrp->auth.md5key, xn->auth.md5key) != 0)
1573 nbrp_changed = 1;
1574 else
1575 nbrp_changed = 0;
1576
1577 nbrp->keepalive = xn->keepalive;
1578 nbrp->gtsm_enabled = xn->gtsm_enabled;
1579 nbrp->gtsm_hops = xn->gtsm_hops;
1580 nbrp->auth.method = xn->auth.method;
1581 strlcpy(nbrp->auth.md5key, xn->auth.md5key,
1582 sizeof(nbrp->auth.md5key));
1583 nbrp->auth.md5key_len = xn->auth.md5key_len;
1584 nbrp->flags = xn->flags;
1585
1586 if (ldpd_process == PROC_LDP_ENGINE) {
1587 nbr = nbr_find_ldpid(nbrp->lsr_id.s_addr);
1588 if (nbr && nbrp_changed) {
1589 session_shutdown(nbr, S_SHUTDOWN, 0, 0);
1590 #ifdef __OpenBSD__
1591 pfkey_remove(nbr);
1592 nbr->auth.method = nbrp->auth.method;
1593 if (pfkey_establish(nbr, nbrp) == -1)
1594 fatalx("pfkey setup failed");
1595 #else
1596 nbr->auth.method = nbrp->auth.method;
1597 sock_set_md5sig((ldp_af_global_get(&global,
1598 nbr->af))->ldp_session_socket, nbr->af,
1599 &nbr->raddr, nbrp->auth.md5key);
1600 #endif
1601 if (nbr_session_active_role(nbr))
1602 nbr_establish_connection(nbr);
1603 }
1604 }
1605 }
1606 }
1607
1608 static void
1609 merge_l2vpns(struct ldpd_conf *conf, struct ldpd_conf *xconf)
1610 {
1611 struct l2vpn *l2vpn, *ltmp, *xl;
1612
1613 RB_FOREACH_SAFE(l2vpn, l2vpn_head, &conf->l2vpn_tree, ltmp) {
1614 /* find deleted l2vpns */
1615 if ((xl = l2vpn_find(xconf, l2vpn->name)) == NULL) {
1616 switch (ldpd_process) {
1617 case PROC_LDE_ENGINE:
1618 l2vpn_exit(l2vpn);
1619 break;
1620 case PROC_LDP_ENGINE:
1621 ldpe_l2vpn_exit(l2vpn);
1622 break;
1623 case PROC_MAIN:
1624 break;
1625 }
1626 RB_REMOVE(l2vpn_head, &conf->l2vpn_tree, l2vpn);
1627 l2vpn_del(l2vpn);
1628 }
1629 }
1630 RB_FOREACH_SAFE(xl, l2vpn_head, &xconf->l2vpn_tree, ltmp) {
1631 /* find new l2vpns */
1632 if ((l2vpn = l2vpn_find(conf, xl->name)) == NULL) {
1633 COPY(l2vpn, xl);
1634 RB_INSERT(l2vpn_head, &conf->l2vpn_tree, l2vpn);
1635 RB_INIT(l2vpn_if_head, &l2vpn->if_tree);
1636 RB_INIT(l2vpn_pw_head, &l2vpn->pw_tree);
1637 RB_INIT(l2vpn_pw_head, &l2vpn->pw_inactive_tree);
1638
1639 switch (ldpd_process) {
1640 case PROC_LDE_ENGINE:
1641 l2vpn_init(l2vpn);
1642 break;
1643 case PROC_LDP_ENGINE:
1644 ldpe_l2vpn_init(l2vpn);
1645 break;
1646 case PROC_MAIN:
1647 break;
1648 }
1649 }
1650
1651 /* update existing l2vpns */
1652 merge_l2vpn(conf, l2vpn, xl);
1653 }
1654 }
1655
1656 static void
1657 merge_l2vpn(struct ldpd_conf *xconf, struct l2vpn *l2vpn, struct l2vpn *xl)
1658 {
1659 struct l2vpn_if *lif, *ftmp, *xf;
1660 struct l2vpn_pw *pw, *ptmp, *xp;
1661 struct nbr *nbr;
1662 int reset_nbr, reinstall_pwfec, reinstall_tnbr;
1663 int previous_pw_type, previous_mtu;
1664
1665 previous_pw_type = l2vpn->pw_type;
1666 previous_mtu = l2vpn->mtu;
1667
1668 /* merge intefaces */
1669 RB_FOREACH_SAFE(lif, l2vpn_if_head, &l2vpn->if_tree, ftmp) {
1670 /* find deleted interfaces */
1671 if ((xf = l2vpn_if_find(xl, lif->ifname)) == NULL) {
1672 RB_REMOVE(l2vpn_if_head, &l2vpn->if_tree, lif);
1673 free(lif);
1674 }
1675 }
1676 RB_FOREACH_SAFE(xf, l2vpn_if_head, &xl->if_tree, ftmp) {
1677 /* find new interfaces */
1678 if ((lif = l2vpn_if_find(l2vpn, xf->ifname)) == NULL) {
1679 COPY(lif, xf);
1680 RB_INSERT(l2vpn_if_head, &l2vpn->if_tree, lif);
1681 lif->l2vpn = l2vpn;
1682
1683 switch (ldpd_process) {
1684 case PROC_LDP_ENGINE:
1685 case PROC_LDE_ENGINE:
1686 break;
1687 case PROC_MAIN:
1688 kif_redistribute(lif->ifname);
1689 break;
1690 }
1691 }
1692 }
1693
1694 /* merge active pseudowires */
1695 RB_FOREACH_SAFE(pw, l2vpn_pw_head, &l2vpn->pw_tree, ptmp) {
1696 /* find deleted active pseudowires */
1697 if ((xp = l2vpn_pw_find_active(xl, pw->ifname)) == NULL) {
1698 switch (ldpd_process) {
1699 case PROC_LDE_ENGINE:
1700 l2vpn_pw_exit(pw);
1701 break;
1702 case PROC_LDP_ENGINE:
1703 ldpe_l2vpn_pw_exit(pw);
1704 break;
1705 case PROC_MAIN:
1706 break;
1707 }
1708
1709 RB_REMOVE(l2vpn_pw_head, &l2vpn->pw_tree, pw);
1710 free(pw);
1711 }
1712 }
1713 RB_FOREACH_SAFE(xp, l2vpn_pw_head, &xl->pw_tree, ptmp) {
1714 /* find new active pseudowires */
1715 if ((pw = l2vpn_pw_find_active(l2vpn, xp->ifname)) == NULL) {
1716 COPY(pw, xp);
1717 RB_INSERT(l2vpn_pw_head, &l2vpn->pw_tree, pw);
1718 pw->l2vpn = l2vpn;
1719
1720 switch (ldpd_process) {
1721 case PROC_LDE_ENGINE:
1722 l2vpn_pw_init(pw);
1723 break;
1724 case PROC_LDP_ENGINE:
1725 ldpe_l2vpn_pw_init(pw);
1726 break;
1727 case PROC_MAIN:
1728 kif_redistribute(pw->ifname);
1729 break;
1730 }
1731 continue;
1732 }
1733
1734 /* update existing active pseudowire */
1735 if (pw->af != xp->af ||
1736 ldp_addrcmp(pw->af, &pw->addr, &xp->addr))
1737 reinstall_tnbr = 1;
1738 else
1739 reinstall_tnbr = 0;
1740
1741 /* changes that require a session restart */
1742 if ((pw->flags & (F_PW_STATUSTLV_CONF|F_PW_CWORD_CONF)) !=
1743 (xp->flags & (F_PW_STATUSTLV_CONF|F_PW_CWORD_CONF)))
1744 reset_nbr = 1;
1745 else
1746 reset_nbr = 0;
1747
1748 if (l2vpn->pw_type != xl->pw_type || l2vpn->mtu != xl->mtu ||
1749 pw->pwid != xp->pwid || reinstall_tnbr || reset_nbr ||
1750 pw->lsr_id.s_addr != xp->lsr_id.s_addr)
1751 reinstall_pwfec = 1;
1752 else
1753 reinstall_pwfec = 0;
1754
1755 if (ldpd_process == PROC_LDP_ENGINE) {
1756 if (reinstall_tnbr)
1757 ldpe_l2vpn_pw_exit(pw);
1758 if (reset_nbr) {
1759 nbr = nbr_find_ldpid(pw->lsr_id.s_addr);
1760 if (nbr && nbr->state == NBR_STA_OPER)
1761 session_shutdown(nbr, S_SHUTDOWN, 0, 0);
1762 }
1763 }
1764 if (ldpd_process == PROC_LDE_ENGINE && reinstall_pwfec)
1765 l2vpn_pw_exit(pw);
1766 pw->lsr_id = xp->lsr_id;
1767 pw->af = xp->af;
1768 pw->addr = xp->addr;
1769 pw->pwid = xp->pwid;
1770 strlcpy(pw->ifname, xp->ifname, sizeof(pw->ifname));
1771 pw->ifindex = xp->ifindex;
1772 if (xp->flags & F_PW_CWORD_CONF)
1773 pw->flags |= F_PW_CWORD_CONF;
1774 else
1775 pw->flags &= ~F_PW_CWORD_CONF;
1776 if (xp->flags & F_PW_STATUSTLV_CONF)
1777 pw->flags |= F_PW_STATUSTLV_CONF;
1778 else
1779 pw->flags &= ~F_PW_STATUSTLV_CONF;
1780 if (xp->flags & F_PW_STATIC_NBR_ADDR)
1781 pw->flags |= F_PW_STATIC_NBR_ADDR;
1782 else
1783 pw->flags &= ~F_PW_STATIC_NBR_ADDR;
1784 if (ldpd_process == PROC_LDP_ENGINE && reinstall_tnbr)
1785 ldpe_l2vpn_pw_init(pw);
1786 if (ldpd_process == PROC_LDE_ENGINE && reinstall_pwfec) {
1787 l2vpn->pw_type = xl->pw_type;
1788 l2vpn->mtu = xl->mtu;
1789 l2vpn_pw_init(pw);
1790 l2vpn->pw_type = previous_pw_type;
1791 l2vpn->mtu = previous_mtu;
1792 }
1793 }
1794
1795 /* merge inactive pseudowires */
1796 RB_FOREACH_SAFE(pw, l2vpn_pw_head, &l2vpn->pw_inactive_tree, ptmp) {
1797 /* find deleted inactive pseudowires */
1798 if ((xp = l2vpn_pw_find_inactive(xl, pw->ifname)) == NULL) {
1799 RB_REMOVE(l2vpn_pw_head, &l2vpn->pw_inactive_tree, pw);
1800 free(pw);
1801 }
1802 }
1803 RB_FOREACH_SAFE(xp, l2vpn_pw_head, &xl->pw_inactive_tree, ptmp) {
1804 /* find new inactive pseudowires */
1805 if ((pw = l2vpn_pw_find_inactive(l2vpn, xp->ifname)) == NULL) {
1806 COPY(pw, xp);
1807 RB_INSERT(l2vpn_pw_head, &l2vpn->pw_inactive_tree, pw);
1808 pw->l2vpn = l2vpn;
1809
1810 switch (ldpd_process) {
1811 case PROC_LDE_ENGINE:
1812 case PROC_LDP_ENGINE:
1813 break;
1814 case PROC_MAIN:
1815 kif_redistribute(pw->ifname);
1816 break;
1817 }
1818 continue;
1819 }
1820
1821 /* update existing inactive pseudowire */
1822 pw->lsr_id.s_addr = xp->lsr_id.s_addr;
1823 pw->af = xp->af;
1824 pw->addr = xp->addr;
1825 pw->pwid = xp->pwid;
1826 strlcpy(pw->ifname, xp->ifname, sizeof(pw->ifname));
1827 pw->ifindex = xp->ifindex;
1828 pw->flags = xp->flags;
1829 }
1830
1831 l2vpn->pw_type = xl->pw_type;
1832 l2vpn->mtu = xl->mtu;
1833 strlcpy(l2vpn->br_ifname, xl->br_ifname, sizeof(l2vpn->br_ifname));
1834 l2vpn->br_ifindex = xl->br_ifindex;
1835 }
1836
1837 struct ldpd_conf *
1838 config_new_empty(void)
1839 {
1840 struct ldpd_conf *xconf;
1841
1842 xconf = calloc(1, sizeof(*xconf));
1843 if (xconf == NULL)
1844 fatal(NULL);
1845
1846 RB_INIT(iface_head, &xconf->iface_tree);
1847 RB_INIT(tnbr_head, &xconf->tnbr_tree);
1848 RB_INIT(nbrp_head, &xconf->nbrp_tree);
1849 RB_INIT(l2vpn_head, &xconf->l2vpn_tree);
1850
1851 /* set default values */
1852 ldp_config_reset(xconf);
1853
1854 return (xconf);
1855 }
1856
1857 void
1858 config_clear(struct ldpd_conf *conf)
1859 {
1860 struct ldpd_conf *xconf;
1861
1862 /*
1863 * Merge current config with an empty config, this will deactivate
1864 * and deallocate all the interfaces, pseudowires and so on. Before
1865 * merging, copy the router-id and other variables to avoid some
1866 * unnecessary operations, like trying to reset the neighborships.
1867 */
1868 xconf = config_new_empty();
1869 xconf->ipv4 = conf->ipv4;
1870 xconf->ipv6 = conf->ipv6;
1871 xconf->rtr_id = conf->rtr_id;
1872 xconf->trans_pref = conf->trans_pref;
1873 xconf->flags = conf->flags;
1874 merge_config(conf, xconf);
1875 free(xconf);
1876 free(conf);
1877 }
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