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Merge branch 'stable/3.0'
[mirror_frr.git] / ldpd / ldpd.c
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
46 static void ldpd_shutdown(void);
47 static pid_t start_child(enum ldpd_process, char *, int, int);
48 static int main_dispatch_ldpe(struct thread *);
49 static int main_dispatch_lde(struct thread *);
50 static int main_imsg_send_ipc_sockets(struct imsgbuf *,
51 struct imsgbuf *);
52 static void main_imsg_send_net_sockets(int);
53 static void main_imsg_send_net_socket(int, enum socket_type);
54 static int main_imsg_send_config(struct ldpd_conf *);
55 static void ldp_config_normalize(struct ldpd_conf *);
56 static void ldp_config_reset(struct ldpd_conf *);
57 static void ldp_config_reset_main(struct ldpd_conf *);
58 static void ldp_config_reset_af(struct ldpd_conf *, int);
59 static void ldp_config_reset_l2vpns(struct ldpd_conf *);
60 static void merge_global(struct ldpd_conf *, struct ldpd_conf *);
61 static void merge_af(int, struct ldpd_af_conf *,
62 struct ldpd_af_conf *);
63 static void merge_ifaces(struct ldpd_conf *, struct ldpd_conf *);
64 static void merge_iface_af(struct iface_af *, struct iface_af *);
65 static void merge_tnbrs(struct ldpd_conf *, struct ldpd_conf *);
66 static void merge_nbrps(struct ldpd_conf *, struct ldpd_conf *);
67 static void merge_l2vpns(struct ldpd_conf *, struct ldpd_conf *);
68 static void merge_l2vpn(struct ldpd_conf *, struct l2vpn *,
69 struct l2vpn *);
70
71 DEFINE_QOBJ_TYPE(iface)
72 DEFINE_QOBJ_TYPE(tnbr)
73 DEFINE_QOBJ_TYPE(nbr_params)
74 DEFINE_QOBJ_TYPE(l2vpn_if)
75 DEFINE_QOBJ_TYPE(l2vpn_pw)
76 DEFINE_QOBJ_TYPE(l2vpn)
77 DEFINE_QOBJ_TYPE(ldpd_conf)
78
79 struct ldpd_global global;
80 struct ldpd_init init;
81 struct ldpd_conf *ldpd_conf, *vty_conf;
82
83 static struct imsgev *iev_ldpe, *iev_ldpe_sync;
84 static struct imsgev *iev_lde, *iev_lde_sync;
85 static pid_t ldpe_pid;
86 static pid_t lde_pid;
87
88 #define LDP_DEFAULT_CONFIG "ldpd.conf"
89 #define LDP_VTY_PORT 2612
90
91 /* Master of threads. */
92 struct thread_master *master;
93
94 static struct frr_daemon_info ldpd_di;
95
96 /* ldpd privileges */
97 static zebra_capabilities_t _caps_p [] =
98 {
99 ZCAP_BIND,
100 ZCAP_NET_ADMIN
101 };
102
103 struct zebra_privs_t ldpd_privs =
104 {
105 #if defined(FRR_USER) && defined(FRR_GROUP)
106 .user = FRR_USER,
107 .group = FRR_GROUP,
108 #endif
109 #if defined(VTY_GROUP)
110 .vty_group = VTY_GROUP,
111 #endif
112 .caps_p = _caps_p,
113 .cap_num_p = array_size(_caps_p),
114 .cap_num_i = 0
115 };
116
117 /* CTL Socket path */
118 char ctl_sock_path[MAXPATHLEN] = LDPD_SOCKET;
119
120 /* LDPd options. */
121 #define OPTION_CTLSOCK 1001
122 static struct option longopts[] =
123 {
124 { "ctl_socket", required_argument, NULL, OPTION_CTLSOCK},
125 { "instance", required_argument, NULL, 'n'},
126 { 0 }
127 };
128
129 /* SIGHUP handler. */
130 static void
131 sighup(void)
132 {
133 log_info("SIGHUP received");
134
135 /*
136 * Do a full configuration reload. In other words, reset vty_conf
137 * and build a new configuartion from scratch.
138 */
139 ldp_config_reset(vty_conf);
140 vty_read_config(ldpd_di.config_file, config_default);
141 ldp_config_apply(NULL, vty_conf);
142 }
143
144 /* SIGINT / SIGTERM handler. */
145 static void
146 sigint(void)
147 {
148 log_info("SIGINT received");
149 ldpd_shutdown();
150 }
151
152 /* SIGUSR1 handler. */
153 static void
154 sigusr1(void)
155 {
156 zlog_rotate();
157 }
158
159 static struct quagga_signal_t ldp_signals[] =
160 {
161 {
162 .signal = SIGHUP,
163 .handler = &sighup,
164 },
165 {
166 .signal = SIGINT,
167 .handler = &sigint,
168 },
169 {
170 .signal = SIGTERM,
171 .handler = &sigint,
172 },
173 {
174 .signal = SIGUSR1,
175 .handler = &sigusr1,
176 }
177 };
178
179 FRR_DAEMON_INFO(ldpd, LDP,
180 .vty_port = LDP_VTY_PORT,
181
182 .proghelp = "Implementation of the LDP protocol.",
183
184 .signals = ldp_signals,
185 .n_signals = array_size(ldp_signals),
186
187 .privs = &ldpd_privs,
188 )
189
190 int
191 main(int argc, char *argv[])
192 {
193 char *saved_argv0;
194 int lflag = 0, eflag = 0;
195 int pipe_parent2ldpe[2], pipe_parent2ldpe_sync[2];
196 int pipe_parent2lde[2], pipe_parent2lde_sync[2];
197 char *ctl_sock_name;
198
199 ldpd_process = PROC_MAIN;
200 log_procname = log_procnames[ldpd_process];
201
202 saved_argv0 = argv[0];
203 if (saved_argv0 == NULL)
204 saved_argv0 = (char *)"ldpd";
205
206 frr_preinit(&ldpd_di, argc, argv);
207 frr_opt_add("LEn:", longopts,
208 " --ctl_socket Override ctl socket path\n"
209 "-n, --instance Instance id\n");
210
211 while (1) {
212 int opt;
213
214 opt = frr_getopt(argc, argv, NULL);
215
216 if (opt == EOF)
217 break;
218
219 switch (opt) {
220 case 0:
221 break;
222 case OPTION_CTLSOCK:
223 ctl_sock_name = strrchr(LDPD_SOCKET, '/');
224 if (ctl_sock_name)
225 /* skip '/' */
226 ctl_sock_name++;
227 else
228 /*
229 * LDPD_SOCKET configured as relative path
230 * during config? Should really never happen for
231 * sensible config
232 */
233 ctl_sock_name = (char *)LDPD_SOCKET;
234 strlcpy(ctl_sock_path, optarg, sizeof(ctl_sock_path));
235 strlcat(ctl_sock_path, "/", sizeof(ctl_sock_path));
236 strlcat(ctl_sock_path, ctl_sock_name,
237 sizeof(ctl_sock_path));
238 break;
239 case 'n':
240 init.instance = atoi(optarg);
241 if (init.instance < 1)
242 exit(0);
243 break;
244 case 'L':
245 lflag = 1;
246 break;
247 case 'E':
248 eflag = 1;
249 break;
250 default:
251 frr_help_exit(1);
252 break;
253 }
254 }
255
256 strlcpy(init.user, ldpd_privs.user, sizeof(init.user));
257 strlcpy(init.group, ldpd_privs.group, sizeof(init.group));
258 strlcpy(init.ctl_sock_path, ctl_sock_path, sizeof(init.ctl_sock_path));
259 strlcpy(init.zclient_serv_path, zclient_serv_path_get(),
260 sizeof(init.zclient_serv_path));
261
262 argc -= optind;
263 argv += optind;
264 if (argc > 0 || (lflag && eflag))
265 frr_help_exit(1);
266
267 /* check for root privileges */
268 if (geteuid() != 0) {
269 errno = EPERM;
270 perror(ldpd_di.progname);
271 exit(1);
272 }
273
274 if (lflag || eflag)
275 openzlog(ldpd_di.progname, "LDP", 0,
276 LOG_CONS | LOG_NDELAY | LOG_PID, LOG_DAEMON);
277 if (lflag)
278 lde();
279 else if (eflag)
280 ldpe();
281
282 if (socketpair(AF_UNIX, SOCK_STREAM, PF_UNSPEC, pipe_parent2ldpe) == -1)
283 fatal("socketpair");
284 if (socketpair(AF_UNIX, SOCK_STREAM, PF_UNSPEC,
285 pipe_parent2ldpe_sync) == -1)
286 fatal("socketpair");
287 if (socketpair(AF_UNIX, SOCK_STREAM, PF_UNSPEC, pipe_parent2lde) == -1)
288 fatal("socketpair");
289 if (socketpair(AF_UNIX, SOCK_STREAM, PF_UNSPEC,
290 pipe_parent2lde_sync) == -1)
291 fatal("socketpair");
292 sock_set_nonblock(pipe_parent2ldpe[0]);
293 sock_set_cloexec(pipe_parent2ldpe[0]);
294 sock_set_nonblock(pipe_parent2ldpe[1]);
295 sock_set_cloexec(pipe_parent2ldpe[1]);
296 sock_set_nonblock(pipe_parent2ldpe_sync[0]);
297 sock_set_cloexec(pipe_parent2ldpe_sync[0]);
298 sock_set_cloexec(pipe_parent2ldpe_sync[1]);
299 sock_set_nonblock(pipe_parent2lde[0]);
300 sock_set_cloexec(pipe_parent2lde[0]);
301 sock_set_nonblock(pipe_parent2lde[1]);
302 sock_set_cloexec(pipe_parent2lde[1]);
303 sock_set_nonblock(pipe_parent2lde_sync[0]);
304 sock_set_cloexec(pipe_parent2lde_sync[0]);
305 sock_set_cloexec(pipe_parent2lde_sync[1]);
306
307 /* start children */
308 lde_pid = start_child(PROC_LDE_ENGINE, saved_argv0,
309 pipe_parent2lde[1], pipe_parent2lde_sync[1]);
310 ldpe_pid = start_child(PROC_LDP_ENGINE, saved_argv0,
311 pipe_parent2ldpe[1], pipe_parent2ldpe_sync[1]);
312
313 master = frr_init();
314
315 vty_config_lockless();
316 vrf_init(NULL, NULL, NULL, NULL);
317 access_list_init();
318 ldp_vty_init();
319 ldp_zebra_init(master);
320
321 /*
322 * Create base configuration with sane defaults. All configuration
323 * requests (e.g. CLI) act on vty_conf and then call ldp_config_apply()
324 * to merge the changes into ldpd_conf, which contains the actual
325 * running configuration.
326 */
327 ldpd_conf = config_new_empty();
328 vty_conf = config_new_empty();
329 QOBJ_REG(vty_conf, ldpd_conf);
330
331 /* read configuration file and daemonize */
332 frr_config_fork();
333
334 /* apply configuration */
335 ldp_config_apply(NULL, vty_conf);
336
337 /* setup pipes to children */
338 if ((iev_ldpe = calloc(1, sizeof(struct imsgev))) == NULL ||
339 (iev_ldpe_sync = calloc(1, sizeof(struct imsgev))) == NULL ||
340 (iev_lde = calloc(1, sizeof(struct imsgev))) == NULL ||
341 (iev_lde_sync = calloc(1, sizeof(struct imsgev))) == NULL)
342 fatal(NULL);
343 imsg_init(&iev_ldpe->ibuf, pipe_parent2ldpe[0]);
344 iev_ldpe->handler_read = main_dispatch_ldpe;
345 iev_ldpe->ev_read = NULL;
346 thread_add_read(master, iev_ldpe->handler_read, iev_ldpe, iev_ldpe->ibuf.fd,
347 &iev_ldpe->ev_read);
348 iev_ldpe->handler_write = ldp_write_handler;
349
350 imsg_init(&iev_ldpe_sync->ibuf, pipe_parent2ldpe_sync[0]);
351 iev_ldpe_sync->handler_read = main_dispatch_ldpe;
352 iev_ldpe_sync->ev_read = NULL;
353 thread_add_read(master, iev_ldpe_sync->handler_read, iev_ldpe_sync, iev_ldpe_sync->ibuf.fd,
354 &iev_ldpe_sync->ev_read);
355 iev_ldpe_sync->handler_write = ldp_write_handler;
356
357 imsg_init(&iev_lde->ibuf, pipe_parent2lde[0]);
358 iev_lde->handler_read = main_dispatch_lde;
359 iev_lde->ev_read = NULL;
360 thread_add_read(master, iev_lde->handler_read, iev_lde, iev_lde->ibuf.fd,
361 &iev_lde->ev_read);
362 iev_lde->handler_write = ldp_write_handler;
363
364 imsg_init(&iev_lde_sync->ibuf, pipe_parent2lde_sync[0]);
365 iev_lde_sync->handler_read = main_dispatch_lde;
366 iev_lde_sync->ev_read = NULL;
367 thread_add_read(master, iev_lde_sync->handler_read, iev_lde_sync, iev_lde_sync->ibuf.fd,
368 &iev_lde_sync->ev_read);
369 iev_lde_sync->handler_write = ldp_write_handler;
370
371 if (main_imsg_send_ipc_sockets(&iev_ldpe->ibuf, &iev_lde->ibuf))
372 fatal("could not establish imsg links");
373 main_imsg_compose_both(IMSG_INIT, &init, sizeof(init));
374 main_imsg_compose_both(IMSG_DEBUG_UPDATE, &ldp_debug,
375 sizeof(ldp_debug));
376 main_imsg_send_config(ldpd_conf);
377
378 if (ldpd_conf->ipv4.flags & F_LDPD_AF_ENABLED)
379 main_imsg_send_net_sockets(AF_INET);
380 if (ldpd_conf->ipv6.flags & F_LDPD_AF_ENABLED)
381 main_imsg_send_net_sockets(AF_INET6);
382
383 frr_run(master);
384
385 /* NOTREACHED */
386 return (0);
387 }
388
389 static void
390 ldpd_shutdown(void)
391 {
392 pid_t pid;
393 int status;
394
395 /* close pipes */
396 msgbuf_clear(&iev_ldpe->ibuf.w);
397 close(iev_ldpe->ibuf.fd);
398 msgbuf_clear(&iev_lde->ibuf.w);
399 close(iev_lde->ibuf.fd);
400
401 config_clear(ldpd_conf);
402
403 ldp_config_reset(vty_conf);
404 QOBJ_UNREG(vty_conf);
405 free(vty_conf);
406
407 log_debug("waiting for children to terminate");
408 do {
409 pid = wait(&status);
410 if (pid == -1) {
411 if (errno != EINTR && errno != ECHILD)
412 fatal("wait");
413 } else if (WIFSIGNALED(status))
414 log_warnx("%s terminated; signal %d",
415 (pid == lde_pid) ? "label decision engine" :
416 "ldp engine", WTERMSIG(status));
417 } while (pid != -1 || (pid == -1 && errno == EINTR));
418
419 free(iev_ldpe);
420 free(iev_lde);
421
422 log_info("terminating");
423
424 vrf_terminate();
425 access_list_reset();
426 cmd_terminate();
427 vty_terminate();
428 ldp_zebra_destroy();
429 zprivs_terminate(&ldpd_privs);
430 thread_master_free(master);
431 closezlog();
432
433 exit(0);
434 }
435
436 static pid_t
437 start_child(enum ldpd_process p, char *argv0, int fd_async, int fd_sync)
438 {
439 char *argv[3];
440 int argc = 0;
441 pid_t pid;
442
443 switch (pid = fork()) {
444 case -1:
445 fatal("cannot fork");
446 case 0:
447 break;
448 default:
449 close(fd_async);
450 close(fd_sync);
451 return (pid);
452 }
453
454 if (dup2(fd_async, LDPD_FD_ASYNC) == -1)
455 fatal("cannot setup imsg async fd");
456 if (dup2(fd_sync, LDPD_FD_SYNC) == -1)
457 fatal("cannot setup imsg sync fd");
458
459 argv[argc++] = argv0;
460 switch (p) {
461 case PROC_MAIN:
462 fatalx("Can not start main process");
463 case PROC_LDE_ENGINE:
464 argv[argc++] = (char *)"-L";
465 break;
466 case PROC_LDP_ENGINE:
467 argv[argc++] = (char *)"-E";
468 break;
469 }
470 argv[argc++] = NULL;
471
472 execvp(argv0, argv);
473 fatal("execvp");
474 }
475
476 /* imsg handling */
477 /* ARGSUSED */
478 static int
479 main_dispatch_ldpe(struct thread *thread)
480 {
481 struct imsgev *iev = THREAD_ARG(thread);
482 struct imsgbuf *ibuf = &iev->ibuf;
483 struct imsg imsg;
484 int af;
485 ssize_t n;
486 int shut = 0;
487
488 iev->ev_read = NULL;
489
490 if ((n = imsg_read(ibuf)) == -1 && errno != EAGAIN)
491 fatal("imsg_read error");
492 if (n == 0) /* connection closed */
493 shut = 1;
494
495 for (;;) {
496 if ((n = imsg_get(ibuf, &imsg)) == -1)
497 fatal("imsg_get");
498
499 if (n == 0)
500 break;
501
502 switch (imsg.hdr.type) {
503 case IMSG_LOG:
504 logit(imsg.hdr.pid, "%s", (const char *)imsg.data);
505 break;
506 case IMSG_REQUEST_SOCKETS:
507 af = imsg.hdr.pid;
508 main_imsg_send_net_sockets(af);
509 break;
510 case IMSG_ACL_CHECK:
511 if (imsg.hdr.len != IMSG_HEADER_SIZE +
512 sizeof(struct acl_check))
513 fatalx("IMSG_ACL_CHECK imsg with wrong len");
514 ldp_acl_reply(iev, (struct acl_check *)imsg.data);
515 break;
516 default:
517 log_debug("%s: error handling imsg %d", __func__,
518 imsg.hdr.type);
519 break;
520 }
521 imsg_free(&imsg);
522 }
523 if (!shut)
524 imsg_event_add(iev);
525 else {
526 /* this pipe is dead, so remove the event handlers and exit */
527 THREAD_READ_OFF(iev->ev_read);
528 THREAD_WRITE_OFF(iev->ev_write);
529 ldpe_pid = 0;
530 if (lde_pid == 0)
531 ldpd_shutdown();
532 else
533 kill(lde_pid, SIGTERM);
534 }
535
536 return (0);
537 }
538
539 /* ARGSUSED */
540 static int
541 main_dispatch_lde(struct thread *thread)
542 {
543 struct imsgev *iev = THREAD_ARG(thread);
544 struct imsgbuf *ibuf = &iev->ibuf;
545 struct imsg imsg;
546 ssize_t n;
547 int shut = 0;
548
549 iev->ev_read = NULL;
550
551 if ((n = imsg_read(ibuf)) == -1 && errno != EAGAIN)
552 fatal("imsg_read error");
553 if (n == 0) /* connection closed */
554 shut = 1;
555
556 for (;;) {
557 if ((n = imsg_get(ibuf, &imsg)) == -1)
558 fatal("imsg_get");
559
560 if (n == 0)
561 break;
562
563 switch (imsg.hdr.type) {
564 case IMSG_LOG:
565 logit(imsg.hdr.pid, "%s", (const char *)imsg.data);
566 break;
567 case IMSG_KLABEL_CHANGE:
568 if (imsg.hdr.len - IMSG_HEADER_SIZE !=
569 sizeof(struct kroute))
570 fatalx("invalid size of IMSG_KLABEL_CHANGE");
571 if (kr_change(imsg.data))
572 log_warnx("%s: error changing route", __func__);
573 break;
574 case IMSG_KLABEL_DELETE:
575 if (imsg.hdr.len - IMSG_HEADER_SIZE !=
576 sizeof(struct kroute))
577 fatalx("invalid size of IMSG_KLABEL_DELETE");
578 if (kr_delete(imsg.data))
579 log_warnx("%s: error deleting route", __func__);
580 break;
581 case IMSG_KPWLABEL_CHANGE:
582 if (imsg.hdr.len - IMSG_HEADER_SIZE !=
583 sizeof(struct kpw))
584 fatalx("invalid size of IMSG_KPWLABEL_CHANGE");
585 if (kmpw_set(imsg.data))
586 log_warnx("%s: error changing pseudowire",
587 __func__);
588 break;
589 case IMSG_KPWLABEL_DELETE:
590 if (imsg.hdr.len - IMSG_HEADER_SIZE !=
591 sizeof(struct kpw))
592 fatalx("invalid size of IMSG_KPWLABEL_DELETE");
593 if (kmpw_unset(imsg.data))
594 log_warnx("%s: error unsetting pseudowire",
595 __func__);
596 break;
597 case IMSG_ACL_CHECK:
598 if (imsg.hdr.len != IMSG_HEADER_SIZE +
599 sizeof(struct acl_check))
600 fatalx("IMSG_ACL_CHECK imsg with wrong len");
601 ldp_acl_reply(iev, (struct acl_check *)imsg.data);
602 break;
603 default:
604 log_debug("%s: error handling imsg %d", __func__,
605 imsg.hdr.type);
606 break;
607 }
608 imsg_free(&imsg);
609 }
610 if (!shut)
611 imsg_event_add(iev);
612 else {
613 /* this pipe is dead, so remove the event handlers and exit */
614 THREAD_READ_OFF(iev->ev_read);
615 THREAD_WRITE_OFF(iev->ev_write);
616 lde_pid = 0;
617 if (ldpe_pid == 0)
618 ldpd_shutdown();
619 else
620 kill(ldpe_pid, SIGTERM);
621 }
622
623 return (0);
624 }
625
626 /* ARGSUSED */
627 int
628 ldp_write_handler(struct thread *thread)
629 {
630 struct imsgev *iev = THREAD_ARG(thread);
631 struct imsgbuf *ibuf = &iev->ibuf;
632 ssize_t n;
633
634 iev->ev_write = NULL;
635
636 if ((n = msgbuf_write(&ibuf->w)) == -1 && errno != EAGAIN)
637 fatal("msgbuf_write");
638 if (n == 0) {
639 /* this pipe is dead, so remove the event handlers */
640 THREAD_READ_OFF(iev->ev_read);
641 THREAD_WRITE_OFF(iev->ev_write);
642 return (0);
643 }
644
645 imsg_event_add(iev);
646
647 return (0);
648 }
649
650 void
651 main_imsg_compose_ldpe(int type, pid_t pid, void *data, uint16_t datalen)
652 {
653 if (iev_ldpe == NULL)
654 return;
655 imsg_compose_event(iev_ldpe, type, 0, pid, -1, data, datalen);
656 }
657
658 void
659 main_imsg_compose_lde(int type, pid_t pid, void *data, uint16_t datalen)
660 {
661 imsg_compose_event(iev_lde, type, 0, pid, -1, data, datalen);
662 }
663
664 int
665 main_imsg_compose_both(enum imsg_type type, void *buf, uint16_t len)
666 {
667 if (iev_ldpe == NULL || iev_lde == NULL)
668 return (0);
669 if (imsg_compose_event(iev_ldpe, type, 0, 0, -1, buf, len) == -1)
670 return (-1);
671 if (imsg_compose_event(iev_lde, type, 0, 0, -1, buf, len) == -1)
672 return (-1);
673 return (0);
674 }
675
676 void
677 imsg_event_add(struct imsgev *iev)
678 {
679 if (iev->handler_read)
680 thread_add_read(master, iev->handler_read, iev, iev->ibuf.fd,
681 &iev->ev_read);
682
683 if (iev->handler_write && iev->ibuf.w.queued)
684 thread_add_write(master, iev->handler_write, iev,
685 iev->ibuf.fd, &iev->ev_write);
686 }
687
688 int
689 imsg_compose_event(struct imsgev *iev, uint16_t type, uint32_t peerid,
690 pid_t pid, int fd, void *data, uint16_t datalen)
691 {
692 int ret;
693
694 if ((ret = imsg_compose(&iev->ibuf, type, peerid,
695 pid, fd, data, datalen)) != -1)
696 imsg_event_add(iev);
697 return (ret);
698 }
699
700 void
701 evbuf_enqueue(struct evbuf *eb, struct ibuf *buf)
702 {
703 ibuf_close(&eb->wbuf, buf);
704 evbuf_event_add(eb);
705 }
706
707 void
708 evbuf_event_add(struct evbuf *eb)
709 {
710 if (eb->wbuf.queued)
711 thread_add_write(master, eb->handler, eb->arg, eb->wbuf.fd,
712 &eb->ev);
713 }
714
715 void
716 evbuf_init(struct evbuf *eb, int fd, int (*handler)(struct thread *),
717 void *arg)
718 {
719 msgbuf_init(&eb->wbuf);
720 eb->wbuf.fd = fd;
721 eb->handler = handler;
722 eb->arg = arg;
723 }
724
725 void
726 evbuf_clear(struct evbuf *eb)
727 {
728 THREAD_WRITE_OFF(eb->ev);
729 msgbuf_clear(&eb->wbuf);
730 eb->wbuf.fd = -1;
731 }
732
733 static int
734 main_imsg_send_ipc_sockets(struct imsgbuf *ldpe_buf, struct imsgbuf *lde_buf)
735 {
736 int pipe_ldpe2lde[2];
737
738 if (socketpair(AF_UNIX, SOCK_STREAM, PF_UNSPEC, pipe_ldpe2lde) == -1)
739 return (-1);
740 sock_set_nonblock(pipe_ldpe2lde[0]);
741 sock_set_nonblock(pipe_ldpe2lde[1]);
742
743 if (imsg_compose(ldpe_buf, IMSG_SOCKET_IPC, 0, 0, pipe_ldpe2lde[0],
744 NULL, 0) == -1)
745 return (-1);
746 if (imsg_compose(lde_buf, IMSG_SOCKET_IPC, 0, 0, pipe_ldpe2lde[1],
747 NULL, 0) == -1)
748 return (-1);
749
750 return (0);
751 }
752
753 static void
754 main_imsg_send_net_sockets(int af)
755 {
756 if (!ldp_addrisset(af, &(ldp_af_conf_get(ldpd_conf, af))->trans_addr))
757 return;
758
759 main_imsg_send_net_socket(af, LDP_SOCKET_DISC);
760 main_imsg_send_net_socket(af, LDP_SOCKET_EDISC);
761 main_imsg_send_net_socket(af, LDP_SOCKET_SESSION);
762 imsg_compose_event(iev_ldpe, IMSG_SETUP_SOCKETS, af, 0, -1, NULL, 0);
763 }
764
765 static void
766 main_imsg_send_net_socket(int af, enum socket_type type)
767 {
768 int fd;
769
770 fd = ldp_create_socket(af, type);
771 if (fd == -1) {
772 log_warnx("%s: failed to create %s socket for address-family "
773 "%s", __func__, socket_name(type), af_name(af));
774 return;
775 }
776
777 imsg_compose_event(iev_ldpe, IMSG_SOCKET_NET, af, 0, fd, &type,
778 sizeof(type));
779 }
780
781 int
782 ldp_acl_request(struct imsgev *iev, char *acl_name, int af,
783 union ldpd_addr *addr, uint8_t prefixlen)
784 {
785 struct imsg imsg;
786 ssize_t n;
787 struct acl_check acl_check;
788
789 if (acl_name[0] == '\0')
790 return FILTER_PERMIT;
791
792 /* build request */
793 strlcpy(acl_check.acl, acl_name, sizeof(acl_check.acl));
794 acl_check.af = af;
795 acl_check.addr = *addr;
796 acl_check.prefixlen = prefixlen;
797
798 /* send (blocking) */
799 imsg_compose_event(iev, IMSG_ACL_CHECK, 0, 0, -1, &acl_check,
800 sizeof(acl_check));
801 imsg_flush(&iev->ibuf);
802
803 /* receive (blocking) and parse result */
804 if ((n = imsg_read(&iev->ibuf)) == -1)
805 fatal("imsg_read error");
806 if ((n = imsg_get(&iev->ibuf, &imsg)) == -1)
807 fatal("imsg_get");
808 if (imsg.hdr.type != IMSG_ACL_CHECK ||
809 imsg.hdr.len != IMSG_HEADER_SIZE + sizeof(int))
810 fatalx("ldp_acl_request: invalid response");
811
812 return (*((int *)imsg.data));
813 }
814
815 void
816 ldp_acl_reply(struct imsgev *iev, struct acl_check *acl_check)
817 {
818 struct access_list *alist;
819 struct prefix prefix;
820 int result;
821
822 alist = access_list_lookup(family2afi(acl_check->af), acl_check->acl);
823 if (alist == NULL)
824 result = FILTER_DENY;
825 else {
826 prefix.family = acl_check->af;
827 switch (prefix.family) {
828 case AF_INET:
829 prefix.u.prefix4 = acl_check->addr.v4;
830 break;
831 case AF_INET6:
832 prefix.u.prefix6 = acl_check->addr.v6;
833 break;
834 default:
835 fatalx("ldp_acl_reply: unknown af");
836 }
837 prefix.prefixlen = acl_check->prefixlen;
838 result = access_list_apply(alist, &prefix);
839 }
840
841 imsg_compose_event(iev, IMSG_ACL_CHECK, 0, 0, -1, &result,
842 sizeof(result));
843 }
844
845 struct ldpd_af_conf *
846 ldp_af_conf_get(struct ldpd_conf *xconf, int af)
847 {
848 switch (af) {
849 case AF_INET:
850 return (&xconf->ipv4);
851 case AF_INET6:
852 return (&xconf->ipv6);
853 default:
854 fatalx("ldp_af_conf_get: unknown af");
855 }
856 }
857
858 struct ldpd_af_global *
859 ldp_af_global_get(struct ldpd_global *xglobal, int af)
860 {
861 switch (af) {
862 case AF_INET:
863 return (&xglobal->ipv4);
864 case AF_INET6:
865 return (&xglobal->ipv6);
866 default:
867 fatalx("ldp_af_global_get: unknown af");
868 }
869 }
870
871 int
872 ldp_is_dual_stack(struct ldpd_conf *xconf)
873 {
874 return ((xconf->ipv4.flags & F_LDPD_AF_ENABLED) &&
875 (xconf->ipv6.flags & F_LDPD_AF_ENABLED));
876 }
877
878 in_addr_t
879 ldp_rtr_id_get(struct ldpd_conf *xconf)
880 {
881 if (xconf->rtr_id.s_addr != INADDR_ANY)
882 return (xconf->rtr_id.s_addr);
883 else
884 return (global.rtr_id.s_addr);
885 }
886
887 static int
888 main_imsg_send_config(struct ldpd_conf *xconf)
889 {
890 struct iface *iface;
891 struct tnbr *tnbr;
892 struct nbr_params *nbrp;
893 struct l2vpn *l2vpn;
894 struct l2vpn_if *lif;
895 struct l2vpn_pw *pw;
896
897 if (main_imsg_compose_both(IMSG_RECONF_CONF, xconf,
898 sizeof(*xconf)) == -1)
899 return (-1);
900
901 RB_FOREACH(iface, iface_head, &xconf->iface_tree) {
902 if (main_imsg_compose_both(IMSG_RECONF_IFACE, iface,
903 sizeof(*iface)) == -1)
904 return (-1);
905 }
906
907 RB_FOREACH(tnbr, tnbr_head, &xconf->tnbr_tree) {
908 if (main_imsg_compose_both(IMSG_RECONF_TNBR, tnbr,
909 sizeof(*tnbr)) == -1)
910 return (-1);
911 }
912
913 RB_FOREACH(nbrp, nbrp_head, &xconf->nbrp_tree) {
914 if (main_imsg_compose_both(IMSG_RECONF_NBRP, nbrp,
915 sizeof(*nbrp)) == -1)
916 return (-1);
917 }
918
919 RB_FOREACH(l2vpn, l2vpn_head, &xconf->l2vpn_tree) {
920 if (main_imsg_compose_both(IMSG_RECONF_L2VPN, l2vpn,
921 sizeof(*l2vpn)) == -1)
922 return (-1);
923
924 RB_FOREACH(lif, l2vpn_if_head, &l2vpn->if_tree) {
925 if (main_imsg_compose_both(IMSG_RECONF_L2VPN_IF, lif,
926 sizeof(*lif)) == -1)
927 return (-1);
928 }
929 RB_FOREACH(pw, l2vpn_pw_head, &l2vpn->pw_tree) {
930 if (main_imsg_compose_both(IMSG_RECONF_L2VPN_PW, pw,
931 sizeof(*pw)) == -1)
932 return (-1);
933 }
934 RB_FOREACH(pw, l2vpn_pw_head, &l2vpn->pw_inactive_tree) {
935 if (main_imsg_compose_both(IMSG_RECONF_L2VPN_IPW, pw,
936 sizeof(*pw)) == -1)
937 return (-1);
938 }
939 }
940
941 if (main_imsg_compose_both(IMSG_RECONF_END, NULL, 0) == -1)
942 return (-1);
943
944 return (0);
945 }
946
947 int
948 ldp_config_apply(struct vty *vty, struct ldpd_conf *xconf)
949 {
950 /*
951 * When reading from a configuration file (startup and sighup), we
952 * call merge_config() only once after the whole config has been read.
953 * This is the optimal and least disruptive way to update the running
954 * configuration.
955 */
956 if (vty && vty->type == VTY_FILE)
957 return (0);
958
959 ldp_config_normalize(xconf);
960
961 if (main_imsg_send_config(xconf) == -1)
962 return (-1);
963
964 merge_config(ldpd_conf, xconf);
965
966 return (0);
967 }
968
969 static void
970 ldp_config_normalize(struct ldpd_conf *xconf)
971 {
972 struct iface *iface, *itmp;
973 struct nbr_params *nbrp, *ntmp;
974 struct l2vpn *l2vpn;
975 struct l2vpn_pw *pw, *ptmp;
976
977 if (!(xconf->flags & F_LDPD_ENABLED))
978 ldp_config_reset_main(xconf);
979 else {
980 if (!(xconf->ipv4.flags & F_LDPD_AF_ENABLED))
981 ldp_config_reset_af(xconf, AF_INET);
982 if (!(xconf->ipv6.flags & F_LDPD_AF_ENABLED))
983 ldp_config_reset_af(xconf, AF_INET6);
984
985 RB_FOREACH_SAFE(iface, iface_head, &xconf->iface_tree, itmp) {
986 if (iface->ipv4.enabled || iface->ipv6.enabled)
987 continue;
988
989 QOBJ_UNREG(iface);
990 RB_REMOVE(iface_head, &vty_conf->iface_tree, iface);
991 free(iface);
992 }
993
994 RB_FOREACH_SAFE(nbrp, nbrp_head, &xconf->nbrp_tree, ntmp) {
995 if (nbrp->flags & (F_NBRP_KEEPALIVE|F_NBRP_GTSM))
996 continue;
997 if (nbrp->auth.method != AUTH_NONE)
998 continue;
999
1000 QOBJ_UNREG(nbrp);
1001 RB_REMOVE(nbrp_head, &vty_conf->nbrp_tree, nbrp);
1002 free(nbrp);
1003 }
1004 }
1005
1006 RB_FOREACH(l2vpn, l2vpn_head, &xconf->l2vpn_tree) {
1007 RB_FOREACH_SAFE(pw, l2vpn_pw_head, &l2vpn->pw_tree, ptmp) {
1008 if (!(pw->flags & F_PW_STATIC_NBR_ADDR)) {
1009 pw->af = AF_INET;
1010 pw->addr.v4 = pw->lsr_id;
1011 }
1012
1013 if (pw->lsr_id.s_addr != INADDR_ANY && pw->pwid != 0)
1014 continue;
1015 RB_REMOVE(l2vpn_pw_head, &l2vpn->pw_tree, pw);
1016 RB_INSERT(l2vpn_pw_head, &l2vpn->pw_inactive_tree, pw);
1017 }
1018 RB_FOREACH_SAFE(pw, l2vpn_pw_head, &l2vpn->pw_inactive_tree,
1019 ptmp) {
1020 if (!(pw->flags & F_PW_STATIC_NBR_ADDR)) {
1021 pw->af = AF_INET;
1022 pw->addr.v4 = pw->lsr_id;
1023 }
1024
1025 if (pw->lsr_id.s_addr == INADDR_ANY || pw->pwid == 0)
1026 continue;
1027 RB_REMOVE(l2vpn_pw_head, &l2vpn->pw_inactive_tree, pw);
1028 RB_INSERT(l2vpn_pw_head, &l2vpn->pw_tree, pw);
1029 }
1030 }
1031 }
1032
1033 static void
1034 ldp_config_reset(struct ldpd_conf *conf)
1035 {
1036 ldp_config_reset_main(conf);
1037 ldp_config_reset_l2vpns(conf);
1038 }
1039
1040 static void
1041 ldp_config_reset_main(struct ldpd_conf *conf)
1042 {
1043 struct iface *iface;
1044 struct nbr_params *nbrp;
1045
1046 while ((iface = RB_ROOT(&conf->iface_tree)) != NULL) {
1047 QOBJ_UNREG(iface);
1048 RB_REMOVE(iface_head, &conf->iface_tree, iface);
1049 free(iface);
1050 }
1051
1052 while ((nbrp = RB_ROOT(&conf->nbrp_tree)) != NULL) {
1053 QOBJ_UNREG(nbrp);
1054 RB_REMOVE(nbrp_head, &conf->nbrp_tree, nbrp);
1055 free(nbrp);
1056 }
1057
1058 conf->rtr_id.s_addr = INADDR_ANY;
1059 ldp_config_reset_af(conf, AF_INET);
1060 ldp_config_reset_af(conf, AF_INET6);
1061 conf->lhello_holdtime = LINK_DFLT_HOLDTIME;
1062 conf->lhello_interval = DEFAULT_HELLO_INTERVAL;
1063 conf->thello_holdtime = TARGETED_DFLT_HOLDTIME;
1064 conf->thello_interval = DEFAULT_HELLO_INTERVAL;
1065 conf->trans_pref = DUAL_STACK_LDPOV6;
1066 conf->flags = 0;
1067 }
1068
1069 static void
1070 ldp_config_reset_af(struct ldpd_conf *conf, int af)
1071 {
1072 struct ldpd_af_conf *af_conf;
1073 struct iface *iface;
1074 struct iface_af *ia;
1075 struct tnbr *tnbr, *ttmp;
1076
1077 RB_FOREACH(iface, iface_head, &conf->iface_tree) {
1078 ia = iface_af_get(iface, af);
1079 ia->enabled = 0;
1080 }
1081
1082 RB_FOREACH_SAFE(tnbr, tnbr_head, &conf->tnbr_tree, ttmp) {
1083 if (tnbr->af != af)
1084 continue;
1085
1086 QOBJ_UNREG(tnbr);
1087 RB_REMOVE(tnbr_head, &conf->tnbr_tree, tnbr);
1088 free(tnbr);
1089 }
1090
1091 af_conf = ldp_af_conf_get(conf, af);
1092 af_conf->keepalive = 180;
1093 af_conf->lhello_holdtime = 0;
1094 af_conf->lhello_interval = 0;
1095 af_conf->thello_holdtime = 0;
1096 af_conf->thello_interval = 0;
1097 memset(&af_conf->trans_addr, 0, sizeof(af_conf->trans_addr));
1098 af_conf->flags = 0;
1099 }
1100
1101 static void
1102 ldp_config_reset_l2vpns(struct ldpd_conf *conf)
1103 {
1104 struct l2vpn *l2vpn;
1105 struct l2vpn_if *lif;
1106 struct l2vpn_pw *pw;
1107
1108 while ((l2vpn = RB_ROOT(&conf->l2vpn_tree)) != NULL) {
1109 while ((lif = RB_ROOT(&l2vpn->if_tree)) != NULL) {
1110 QOBJ_UNREG(lif);
1111 RB_REMOVE(l2vpn_if_head, &l2vpn->if_tree, lif);
1112 free(lif);
1113 }
1114 while ((pw = RB_ROOT(&l2vpn->pw_tree)) != NULL) {
1115 QOBJ_UNREG(pw);
1116 RB_REMOVE(l2vpn_pw_head, &l2vpn->pw_tree, pw);
1117 free(pw);
1118 }
1119 while ((pw = RB_ROOT(&l2vpn->pw_inactive_tree)) != NULL) {
1120 QOBJ_UNREG(pw);
1121 RB_REMOVE(l2vpn_pw_head, &l2vpn->pw_inactive_tree, pw);
1122 free(pw);
1123 }
1124 QOBJ_UNREG(l2vpn);
1125 RB_REMOVE(l2vpn_head, &conf->l2vpn_tree, l2vpn);
1126 free(l2vpn);
1127 }
1128 }
1129
1130 void
1131 ldp_clear_config(struct ldpd_conf *xconf)
1132 {
1133 struct iface *iface;
1134 struct tnbr *tnbr;
1135 struct nbr_params *nbrp;
1136 struct l2vpn *l2vpn;
1137
1138 while ((iface = RB_ROOT(&xconf->iface_tree)) != NULL) {
1139 RB_REMOVE(iface_head, &xconf->iface_tree, iface);
1140 free(iface);
1141 }
1142 while ((tnbr = RB_ROOT(&xconf->tnbr_tree)) != NULL) {
1143 RB_REMOVE(tnbr_head, &xconf->tnbr_tree, tnbr);
1144 free(tnbr);
1145 }
1146 while ((nbrp = RB_ROOT(&xconf->nbrp_tree)) != NULL) {
1147 RB_REMOVE(nbrp_head, &xconf->nbrp_tree, nbrp);
1148 free(nbrp);
1149 }
1150 while ((l2vpn = RB_ROOT(&xconf->l2vpn_tree)) != NULL) {
1151 RB_REMOVE(l2vpn_head, &xconf->l2vpn_tree, l2vpn);
1152 l2vpn_del(l2vpn);
1153 }
1154
1155 free(xconf);
1156 }
1157
1158 #define COPY(a, b) do { \
1159 a = malloc(sizeof(*a)); \
1160 if (a == NULL) \
1161 fatal(__func__); \
1162 *a = *b; \
1163 } while (0)
1164
1165 void
1166 merge_config(struct ldpd_conf *conf, struct ldpd_conf *xconf)
1167 {
1168 merge_global(conf, xconf);
1169 merge_af(AF_INET, &conf->ipv4, &xconf->ipv4);
1170 merge_af(AF_INET6, &conf->ipv6, &xconf->ipv6);
1171 merge_ifaces(conf, xconf);
1172 merge_tnbrs(conf, xconf);
1173 merge_nbrps(conf, xconf);
1174 merge_l2vpns(conf, xconf);
1175 }
1176
1177 static void
1178 merge_global(struct ldpd_conf *conf, struct ldpd_conf *xconf)
1179 {
1180 /* change of router-id requires resetting all neighborships */
1181 if (conf->rtr_id.s_addr != xconf->rtr_id.s_addr) {
1182 if (ldpd_process == PROC_LDP_ENGINE) {
1183 ldpe_reset_nbrs(AF_UNSPEC);
1184 if (conf->rtr_id.s_addr == INADDR_ANY ||
1185 xconf->rtr_id.s_addr == INADDR_ANY) {
1186 if_update_all(AF_UNSPEC);
1187 tnbr_update_all(AF_UNSPEC);
1188 }
1189 }
1190 conf->rtr_id = xconf->rtr_id;
1191 }
1192
1193 conf->lhello_holdtime = xconf->lhello_holdtime;
1194 conf->lhello_interval = xconf->lhello_interval;
1195 conf->thello_holdtime = xconf->thello_holdtime;
1196 conf->thello_interval = xconf->thello_interval;
1197
1198 if (conf->trans_pref != xconf->trans_pref) {
1199 if (ldpd_process == PROC_LDP_ENGINE)
1200 ldpe_reset_ds_nbrs();
1201 conf->trans_pref = xconf->trans_pref;
1202 }
1203
1204 if ((conf->flags & F_LDPD_DS_CISCO_INTEROP) !=
1205 (xconf->flags & F_LDPD_DS_CISCO_INTEROP)) {
1206 if (ldpd_process == PROC_LDP_ENGINE)
1207 ldpe_reset_ds_nbrs();
1208 }
1209
1210 conf->flags = xconf->flags;
1211 }
1212
1213 static void
1214 merge_af(int af, struct ldpd_af_conf *af_conf, struct ldpd_af_conf *xa)
1215 {
1216 int stop_init_backoff = 0;
1217 int remove_dynamic_tnbrs = 0;
1218 int change_egress_label = 0;
1219 int reset_nbrs_ipv4 = 0;
1220 int reset_nbrs = 0;
1221 int update_sockets = 0;
1222
1223 /* update timers */
1224 if (af_conf->keepalive != xa->keepalive) {
1225 af_conf->keepalive = xa->keepalive;
1226 stop_init_backoff = 1;
1227 }
1228 af_conf->lhello_holdtime = xa->lhello_holdtime;
1229 af_conf->lhello_interval = xa->lhello_interval;
1230 af_conf->thello_holdtime = xa->thello_holdtime;
1231 af_conf->thello_interval = xa->thello_interval;
1232
1233 /* update flags */
1234 if ((af_conf->flags & F_LDPD_AF_THELLO_ACCEPT) &&
1235 !(xa->flags & F_LDPD_AF_THELLO_ACCEPT))
1236 remove_dynamic_tnbrs = 1;
1237 if ((af_conf->flags & F_LDPD_AF_NO_GTSM) !=
1238 (xa->flags & F_LDPD_AF_NO_GTSM)) {
1239 if (af == AF_INET6)
1240 /* need to set/unset IPV6_MINHOPCOUNT */
1241 update_sockets = 1;
1242 else
1243 /* for LDPv4 just resetting the neighbors is enough */
1244 reset_nbrs_ipv4 = 1;
1245 }
1246 if ((af_conf->flags & F_LDPD_AF_EXPNULL) !=
1247 (xa->flags & F_LDPD_AF_EXPNULL))
1248 change_egress_label = 1;
1249 af_conf->flags = xa->flags;
1250
1251 /* update the transport address */
1252 if (ldp_addrcmp(af, &af_conf->trans_addr, &xa->trans_addr)) {
1253 af_conf->trans_addr = xa->trans_addr;
1254 update_sockets = 1;
1255 }
1256
1257 /* update ACLs */
1258 if (strcmp(af_conf->acl_label_advertise_to,
1259 xa->acl_label_advertise_to) ||
1260 strcmp(af_conf->acl_label_advertise_for,
1261 xa->acl_label_advertise_for) ||
1262 strcmp(af_conf->acl_label_accept_from,
1263 xa->acl_label_accept_from) ||
1264 strcmp(af_conf->acl_label_accept_for,
1265 xa->acl_label_accept_for))
1266 reset_nbrs = 1;
1267 if (strcmp(af_conf->acl_thello_accept_from, xa->acl_thello_accept_from))
1268 remove_dynamic_tnbrs = 1;
1269 if (strcmp(af_conf->acl_label_expnull_for, xa->acl_label_expnull_for))
1270 change_egress_label = 1;
1271 strlcpy(af_conf->acl_thello_accept_from, xa->acl_thello_accept_from,
1272 sizeof(af_conf->acl_thello_accept_from));
1273 strlcpy(af_conf->acl_label_allocate_for, xa->acl_label_allocate_for,
1274 sizeof(af_conf->acl_label_allocate_for));
1275 strlcpy(af_conf->acl_label_advertise_to, xa->acl_label_advertise_to,
1276 sizeof(af_conf->acl_label_advertise_to));
1277 strlcpy(af_conf->acl_label_advertise_for, xa->acl_label_advertise_for,
1278 sizeof(af_conf->acl_label_advertise_for));
1279 strlcpy(af_conf->acl_label_accept_from, xa->acl_label_accept_from,
1280 sizeof(af_conf->acl_label_accept_from));
1281 strlcpy(af_conf->acl_label_accept_for, xa->acl_label_accept_for,
1282 sizeof(af_conf->acl_label_accept_for));
1283 strlcpy(af_conf->acl_label_expnull_for, xa->acl_label_expnull_for,
1284 sizeof(af_conf->acl_label_expnull_for));
1285
1286 /* apply the new configuration */
1287 switch (ldpd_process) {
1288 case PROC_LDE_ENGINE:
1289 if (change_egress_label)
1290 lde_change_egress_label(af);
1291 break;
1292 case PROC_LDP_ENGINE:
1293 if (stop_init_backoff)
1294 ldpe_stop_init_backoff(af);
1295 if (remove_dynamic_tnbrs)
1296 ldpe_remove_dynamic_tnbrs(af);
1297 if (reset_nbrs)
1298 ldpe_reset_nbrs(AF_UNSPEC);
1299 else if (reset_nbrs_ipv4)
1300 ldpe_reset_nbrs(AF_INET);
1301 break;
1302 case PROC_MAIN:
1303 if (update_sockets && iev_ldpe)
1304 imsg_compose_event(iev_ldpe, IMSG_CLOSE_SOCKETS, af,
1305 0, -1, NULL, 0);
1306 break;
1307 }
1308 }
1309
1310 static void
1311 merge_ifaces(struct ldpd_conf *conf, struct ldpd_conf *xconf)
1312 {
1313 struct iface *iface, *itmp, *xi;
1314
1315 RB_FOREACH_SAFE(iface, iface_head, &conf->iface_tree, itmp) {
1316 /* find deleted interfaces */
1317 if ((xi = if_lookup_name(xconf, iface->name)) == NULL) {
1318 switch (ldpd_process) {
1319 case PROC_LDP_ENGINE:
1320 ldpe_if_exit(iface);
1321 break;
1322 case PROC_LDE_ENGINE:
1323 case PROC_MAIN:
1324 break;
1325 }
1326 RB_REMOVE(iface_head, &conf->iface_tree, iface);
1327 free(iface);
1328 }
1329 }
1330 RB_FOREACH_SAFE(xi, iface_head, &xconf->iface_tree, itmp) {
1331 /* find new interfaces */
1332 if ((iface = if_lookup_name(conf, xi->name)) == NULL) {
1333 COPY(iface, xi);
1334 RB_INSERT(iface_head, &conf->iface_tree, iface);
1335
1336 switch (ldpd_process) {
1337 case PROC_LDP_ENGINE:
1338 ldpe_if_init(iface);
1339 break;
1340 case PROC_LDE_ENGINE:
1341 break;
1342 case PROC_MAIN:
1343 /* resend addresses to activate new interfaces */
1344 kif_redistribute(iface->name);
1345 break;
1346 }
1347 continue;
1348 }
1349
1350 /* update existing interfaces */
1351 merge_iface_af(&iface->ipv4, &xi->ipv4);
1352 merge_iface_af(&iface->ipv6, &xi->ipv6);
1353 }
1354 }
1355
1356 static void
1357 merge_iface_af(struct iface_af *ia, struct iface_af *xi)
1358 {
1359 if (ia->enabled != xi->enabled) {
1360 ia->enabled = xi->enabled;
1361 if (ldpd_process == PROC_LDP_ENGINE)
1362 ldp_if_update(ia->iface, ia->af);
1363 }
1364 ia->hello_holdtime = xi->hello_holdtime;
1365 ia->hello_interval = xi->hello_interval;
1366 }
1367
1368 static void
1369 merge_tnbrs(struct ldpd_conf *conf, struct ldpd_conf *xconf)
1370 {
1371 struct tnbr *tnbr, *ttmp, *xt;
1372
1373 RB_FOREACH_SAFE(tnbr, tnbr_head, &conf->tnbr_tree, ttmp) {
1374 if (!(tnbr->flags & F_TNBR_CONFIGURED))
1375 continue;
1376
1377 /* find deleted tnbrs */
1378 if ((xt = tnbr_find(xconf, tnbr->af, &tnbr->addr)) == NULL) {
1379 switch (ldpd_process) {
1380 case PROC_LDP_ENGINE:
1381 tnbr->flags &= ~F_TNBR_CONFIGURED;
1382 tnbr_check(conf, tnbr);
1383 break;
1384 case PROC_LDE_ENGINE:
1385 case PROC_MAIN:
1386 RB_REMOVE(tnbr_head, &conf->tnbr_tree, tnbr);
1387 free(tnbr);
1388 break;
1389 }
1390 }
1391 }
1392 RB_FOREACH_SAFE(xt, tnbr_head, &xconf->tnbr_tree, ttmp) {
1393 /* find new tnbrs */
1394 if ((tnbr = tnbr_find(conf, xt->af, &xt->addr)) == NULL) {
1395 COPY(tnbr, xt);
1396 RB_INSERT(tnbr_head, &conf->tnbr_tree, tnbr);
1397
1398 switch (ldpd_process) {
1399 case PROC_LDP_ENGINE:
1400 tnbr_update(tnbr);
1401 break;
1402 case PROC_LDE_ENGINE:
1403 case PROC_MAIN:
1404 break;
1405 }
1406 continue;
1407 }
1408
1409 /* update existing tnbrs */
1410 if (!(tnbr->flags & F_TNBR_CONFIGURED))
1411 tnbr->flags |= F_TNBR_CONFIGURED;
1412 }
1413 }
1414
1415 static void
1416 merge_nbrps(struct ldpd_conf *conf, struct ldpd_conf *xconf)
1417 {
1418 struct nbr_params *nbrp, *ntmp, *xn;
1419 struct nbr *nbr;
1420 int nbrp_changed;
1421
1422 RB_FOREACH_SAFE(nbrp, nbrp_head, &conf->nbrp_tree, ntmp) {
1423 /* find deleted nbrps */
1424 if ((xn = nbr_params_find(xconf, nbrp->lsr_id)) == NULL) {
1425 switch (ldpd_process) {
1426 case PROC_LDP_ENGINE:
1427 nbr = nbr_find_ldpid(nbrp->lsr_id.s_addr);
1428 if (nbr) {
1429 session_shutdown(nbr, S_SHUTDOWN, 0, 0);
1430 #ifdef __OpenBSD__
1431 pfkey_remove(nbr);
1432 #else
1433 sock_set_md5sig(
1434 (ldp_af_global_get(&global,
1435 nbr->af))->ldp_session_socket,
1436 nbr->af, &nbr->raddr, NULL);
1437 #endif
1438 nbr->auth.method = AUTH_NONE;
1439 if (nbr_session_active_role(nbr))
1440 nbr_establish_connection(nbr);
1441 }
1442 break;
1443 case PROC_LDE_ENGINE:
1444 case PROC_MAIN:
1445 break;
1446 }
1447 RB_REMOVE(nbrp_head, &conf->nbrp_tree, nbrp);
1448 free(nbrp);
1449 }
1450 }
1451 RB_FOREACH_SAFE(xn, nbrp_head, &xconf->nbrp_tree, ntmp) {
1452 /* find new nbrps */
1453 if ((nbrp = nbr_params_find(conf, xn->lsr_id)) == NULL) {
1454 COPY(nbrp, xn);
1455 RB_INSERT(nbrp_head, &conf->nbrp_tree, nbrp);
1456
1457 switch (ldpd_process) {
1458 case PROC_LDP_ENGINE:
1459 nbr = nbr_find_ldpid(nbrp->lsr_id.s_addr);
1460 if (nbr) {
1461 session_shutdown(nbr, S_SHUTDOWN, 0, 0);
1462 nbr->auth.method = nbrp->auth.method;
1463 #ifdef __OpenBSD__
1464 if (pfkey_establish(nbr, nbrp) == -1)
1465 fatalx("pfkey setup failed");
1466 #else
1467 sock_set_md5sig(
1468 (ldp_af_global_get(&global,
1469 nbr->af))->ldp_session_socket,
1470 nbr->af, &nbr->raddr,
1471 nbrp->auth.md5key);
1472 #endif
1473 if (nbr_session_active_role(nbr))
1474 nbr_establish_connection(nbr);
1475 }
1476 break;
1477 case PROC_LDE_ENGINE:
1478 case PROC_MAIN:
1479 break;
1480 }
1481 continue;
1482 }
1483
1484 /* update existing nbrps */
1485 if (nbrp->flags != xn->flags ||
1486 nbrp->keepalive != xn->keepalive ||
1487 nbrp->gtsm_enabled != xn->gtsm_enabled ||
1488 nbrp->gtsm_hops != xn->gtsm_hops ||
1489 nbrp->auth.method != xn->auth.method ||
1490 strcmp(nbrp->auth.md5key, xn->auth.md5key) != 0)
1491 nbrp_changed = 1;
1492 else
1493 nbrp_changed = 0;
1494
1495 nbrp->keepalive = xn->keepalive;
1496 nbrp->gtsm_enabled = xn->gtsm_enabled;
1497 nbrp->gtsm_hops = xn->gtsm_hops;
1498 nbrp->auth.method = xn->auth.method;
1499 strlcpy(nbrp->auth.md5key, xn->auth.md5key,
1500 sizeof(nbrp->auth.md5key));
1501 nbrp->auth.md5key_len = xn->auth.md5key_len;
1502 nbrp->flags = xn->flags;
1503
1504 if (ldpd_process == PROC_LDP_ENGINE) {
1505 nbr = nbr_find_ldpid(nbrp->lsr_id.s_addr);
1506 if (nbr && nbrp_changed) {
1507 session_shutdown(nbr, S_SHUTDOWN, 0, 0);
1508 #ifdef __OpenBSD__
1509 pfkey_remove(nbr);
1510 nbr->auth.method = nbrp->auth.method;
1511 if (pfkey_establish(nbr, nbrp) == -1)
1512 fatalx("pfkey setup failed");
1513 #else
1514 nbr->auth.method = nbrp->auth.method;
1515 sock_set_md5sig((ldp_af_global_get(&global,
1516 nbr->af))->ldp_session_socket, nbr->af,
1517 &nbr->raddr, nbrp->auth.md5key);
1518 #endif
1519 if (nbr_session_active_role(nbr))
1520 nbr_establish_connection(nbr);
1521 }
1522 }
1523 }
1524 }
1525
1526 static void
1527 merge_l2vpns(struct ldpd_conf *conf, struct ldpd_conf *xconf)
1528 {
1529 struct l2vpn *l2vpn, *ltmp, *xl;
1530
1531 RB_FOREACH_SAFE(l2vpn, l2vpn_head, &conf->l2vpn_tree, ltmp) {
1532 /* find deleted l2vpns */
1533 if ((xl = l2vpn_find(xconf, l2vpn->name)) == NULL) {
1534 switch (ldpd_process) {
1535 case PROC_LDE_ENGINE:
1536 l2vpn_exit(l2vpn);
1537 break;
1538 case PROC_LDP_ENGINE:
1539 ldpe_l2vpn_exit(l2vpn);
1540 break;
1541 case PROC_MAIN:
1542 break;
1543 }
1544 RB_REMOVE(l2vpn_head, &conf->l2vpn_tree, l2vpn);
1545 l2vpn_del(l2vpn);
1546 }
1547 }
1548 RB_FOREACH_SAFE(xl, l2vpn_head, &xconf->l2vpn_tree, ltmp) {
1549 /* find new l2vpns */
1550 if ((l2vpn = l2vpn_find(conf, xl->name)) == NULL) {
1551 COPY(l2vpn, xl);
1552 RB_INSERT(l2vpn_head, &conf->l2vpn_tree, l2vpn);
1553 RB_INIT(&l2vpn->if_tree);
1554 RB_INIT(&l2vpn->pw_tree);
1555 RB_INIT(&l2vpn->pw_inactive_tree);
1556
1557 switch (ldpd_process) {
1558 case PROC_LDE_ENGINE:
1559 l2vpn_init(l2vpn);
1560 break;
1561 case PROC_LDP_ENGINE:
1562 ldpe_l2vpn_init(l2vpn);
1563 break;
1564 case PROC_MAIN:
1565 break;
1566 }
1567 }
1568
1569 /* update existing l2vpns */
1570 merge_l2vpn(conf, l2vpn, xl);
1571 }
1572 }
1573
1574 static void
1575 merge_l2vpn(struct ldpd_conf *xconf, struct l2vpn *l2vpn, struct l2vpn *xl)
1576 {
1577 struct l2vpn_if *lif, *ftmp, *xf;
1578 struct l2vpn_pw *pw, *ptmp, *xp;
1579 struct nbr *nbr;
1580 int reset_nbr, reinstall_pwfec, reinstall_tnbr;
1581 int previous_pw_type, previous_mtu;
1582
1583 previous_pw_type = l2vpn->pw_type;
1584 previous_mtu = l2vpn->mtu;
1585
1586 /* merge intefaces */
1587 RB_FOREACH_SAFE(lif, l2vpn_if_head, &l2vpn->if_tree, ftmp) {
1588 /* find deleted interfaces */
1589 if ((xf = l2vpn_if_find(xl, lif->ifname)) == NULL) {
1590 RB_REMOVE(l2vpn_if_head, &l2vpn->if_tree, lif);
1591 free(lif);
1592 }
1593 }
1594 RB_FOREACH_SAFE(xf, l2vpn_if_head, &xl->if_tree, ftmp) {
1595 /* find new interfaces */
1596 if ((lif = l2vpn_if_find(l2vpn, xf->ifname)) == NULL) {
1597 COPY(lif, xf);
1598 RB_INSERT(l2vpn_if_head, &l2vpn->if_tree, lif);
1599 lif->l2vpn = l2vpn;
1600
1601 switch (ldpd_process) {
1602 case PROC_LDP_ENGINE:
1603 case PROC_LDE_ENGINE:
1604 break;
1605 case PROC_MAIN:
1606 kif_redistribute(lif->ifname);
1607 break;
1608 }
1609 }
1610 }
1611
1612 /* merge active pseudowires */
1613 RB_FOREACH_SAFE(pw, l2vpn_pw_head, &l2vpn->pw_tree, ptmp) {
1614 /* find deleted active pseudowires */
1615 if ((xp = l2vpn_pw_find_active(xl, pw->ifname)) == NULL) {
1616 switch (ldpd_process) {
1617 case PROC_LDE_ENGINE:
1618 l2vpn_pw_exit(pw);
1619 break;
1620 case PROC_LDP_ENGINE:
1621 ldpe_l2vpn_pw_exit(pw);
1622 break;
1623 case PROC_MAIN:
1624 break;
1625 }
1626
1627 RB_REMOVE(l2vpn_pw_head, &l2vpn->pw_tree, pw);
1628 free(pw);
1629 }
1630 }
1631 RB_FOREACH_SAFE(xp, l2vpn_pw_head, &xl->pw_tree, ptmp) {
1632 /* find new active pseudowires */
1633 if ((pw = l2vpn_pw_find_active(l2vpn, xp->ifname)) == NULL) {
1634 COPY(pw, xp);
1635 RB_INSERT(l2vpn_pw_head, &l2vpn->pw_tree, pw);
1636 pw->l2vpn = l2vpn;
1637
1638 switch (ldpd_process) {
1639 case PROC_LDE_ENGINE:
1640 l2vpn_pw_init(pw);
1641 break;
1642 case PROC_LDP_ENGINE:
1643 ldpe_l2vpn_pw_init(pw);
1644 break;
1645 case PROC_MAIN:
1646 kif_redistribute(pw->ifname);
1647 break;
1648 }
1649 continue;
1650 }
1651
1652 /* update existing active pseudowire */
1653 if (pw->af != xp->af ||
1654 ldp_addrcmp(pw->af, &pw->addr, &xp->addr))
1655 reinstall_tnbr = 1;
1656 else
1657 reinstall_tnbr = 0;
1658
1659 /* changes that require a session restart */
1660 if ((pw->flags & (F_PW_STATUSTLV_CONF|F_PW_CWORD_CONF)) !=
1661 (xp->flags & (F_PW_STATUSTLV_CONF|F_PW_CWORD_CONF)))
1662 reset_nbr = 1;
1663 else
1664 reset_nbr = 0;
1665
1666 if (l2vpn->pw_type != xl->pw_type || l2vpn->mtu != xl->mtu ||
1667 pw->pwid != xp->pwid || reinstall_tnbr || reset_nbr ||
1668 pw->lsr_id.s_addr != xp->lsr_id.s_addr)
1669 reinstall_pwfec = 1;
1670 else
1671 reinstall_pwfec = 0;
1672
1673 if (ldpd_process == PROC_LDP_ENGINE) {
1674 if (reinstall_tnbr)
1675 ldpe_l2vpn_pw_exit(pw);
1676 if (reset_nbr) {
1677 nbr = nbr_find_ldpid(pw->lsr_id.s_addr);
1678 if (nbr && nbr->state == NBR_STA_OPER)
1679 session_shutdown(nbr, S_SHUTDOWN, 0, 0);
1680 }
1681 }
1682 if (ldpd_process == PROC_LDE_ENGINE && reinstall_pwfec)
1683 l2vpn_pw_exit(pw);
1684 pw->lsr_id = xp->lsr_id;
1685 pw->af = xp->af;
1686 pw->addr = xp->addr;
1687 pw->pwid = xp->pwid;
1688 strlcpy(pw->ifname, xp->ifname, sizeof(pw->ifname));
1689 pw->ifindex = xp->ifindex;
1690 if (xp->flags & F_PW_CWORD_CONF)
1691 pw->flags |= F_PW_CWORD_CONF;
1692 else
1693 pw->flags &= ~F_PW_CWORD_CONF;
1694 if (xp->flags & F_PW_STATUSTLV_CONF)
1695 pw->flags |= F_PW_STATUSTLV_CONF;
1696 else
1697 pw->flags &= ~F_PW_STATUSTLV_CONF;
1698 if (xp->flags & F_PW_STATIC_NBR_ADDR)
1699 pw->flags |= F_PW_STATIC_NBR_ADDR;
1700 else
1701 pw->flags &= ~F_PW_STATIC_NBR_ADDR;
1702 if (ldpd_process == PROC_LDP_ENGINE && reinstall_tnbr)
1703 ldpe_l2vpn_pw_init(pw);
1704 if (ldpd_process == PROC_LDE_ENGINE && reinstall_pwfec) {
1705 l2vpn->pw_type = xl->pw_type;
1706 l2vpn->mtu = xl->mtu;
1707 l2vpn_pw_init(pw);
1708 l2vpn->pw_type = previous_pw_type;
1709 l2vpn->mtu = previous_mtu;
1710 }
1711 }
1712
1713 /* merge inactive pseudowires */
1714 RB_FOREACH_SAFE(pw, l2vpn_pw_head, &l2vpn->pw_inactive_tree, ptmp) {
1715 /* find deleted inactive pseudowires */
1716 if ((xp = l2vpn_pw_find_inactive(xl, pw->ifname)) == NULL) {
1717 RB_REMOVE(l2vpn_pw_head, &l2vpn->pw_inactive_tree, pw);
1718 free(pw);
1719 }
1720 }
1721 RB_FOREACH_SAFE(xp, l2vpn_pw_head, &xl->pw_inactive_tree, ptmp) {
1722 /* find new inactive pseudowires */
1723 if ((pw = l2vpn_pw_find_inactive(l2vpn, xp->ifname)) == NULL) {
1724 COPY(pw, xp);
1725 RB_INSERT(l2vpn_pw_head, &l2vpn->pw_inactive_tree, pw);
1726 pw->l2vpn = l2vpn;
1727
1728 switch (ldpd_process) {
1729 case PROC_LDE_ENGINE:
1730 case PROC_LDP_ENGINE:
1731 break;
1732 case PROC_MAIN:
1733 kif_redistribute(pw->ifname);
1734 break;
1735 }
1736 continue;
1737 }
1738
1739 /* update existing inactive pseudowire */
1740 pw->lsr_id.s_addr = xp->lsr_id.s_addr;
1741 pw->af = xp->af;
1742 pw->addr = xp->addr;
1743 pw->pwid = xp->pwid;
1744 strlcpy(pw->ifname, xp->ifname, sizeof(pw->ifname));
1745 pw->ifindex = xp->ifindex;
1746 pw->flags = xp->flags;
1747 }
1748
1749 l2vpn->pw_type = xl->pw_type;
1750 l2vpn->mtu = xl->mtu;
1751 strlcpy(l2vpn->br_ifname, xl->br_ifname, sizeof(l2vpn->br_ifname));
1752 l2vpn->br_ifindex = xl->br_ifindex;
1753 }
1754
1755 struct ldpd_conf *
1756 config_new_empty(void)
1757 {
1758 struct ldpd_conf *xconf;
1759
1760 xconf = calloc(1, sizeof(*xconf));
1761 if (xconf == NULL)
1762 fatal(NULL);
1763
1764 RB_INIT(&xconf->iface_tree);
1765 RB_INIT(&xconf->tnbr_tree);
1766 RB_INIT(&xconf->nbrp_tree);
1767 RB_INIT(&xconf->l2vpn_tree);
1768
1769 /* set default values */
1770 ldp_config_reset(xconf);
1771
1772 return (xconf);
1773 }
1774
1775 void
1776 config_clear(struct ldpd_conf *conf)
1777 {
1778 struct ldpd_conf *xconf;
1779
1780 /*
1781 * Merge current config with an empty config, this will deactivate
1782 * and deallocate all the interfaces, pseudowires and so on. Before
1783 * merging, copy the router-id and other variables to avoid some
1784 * unnecessary operations, like trying to reset the neighborships.
1785 */
1786 xconf = config_new_empty();
1787 xconf->ipv4 = conf->ipv4;
1788 xconf->ipv6 = conf->ipv6;
1789 xconf->rtr_id = conf->rtr_id;
1790 xconf->trans_pref = conf->trans_pref;
1791 xconf->flags = conf->flags;
1792 merge_config(conf, xconf);
1793 free(xconf);
1794 free(conf);
1795 }
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