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 enum ldpd_process ldpd_process;
90
91 #define LDP_DEFAULT_CONFIG "ldpd.conf"
92 #define LDP_VTY_PORT 2612
93
94 /* Master of threads. */
95 struct thread_master *master;
96
97 static struct frr_daemon_info ldpd_di;
98
99 /* ldpd privileges */
100 static zebra_capabilities_t _caps_p [] =
101 {
102 ZCAP_BIND,
103 ZCAP_NET_ADMIN
104 };
105
106 struct zebra_privs_t ldpd_privs =
107 {
108 #if defined(FRR_USER) && defined(FRR_GROUP)
109 .user = FRR_USER,
110 .group = FRR_GROUP,
111 #endif
112 #if defined(VTY_GROUP)
113 .vty_group = VTY_GROUP,
114 #endif
115 .caps_p = _caps_p,
116 .cap_num_p = array_size(_caps_p),
117 .cap_num_i = 0
118 };
119
120 /* CTL Socket path */
121 char ctl_sock_path[MAXPATHLEN];
122
123 /* LDPd options. */
124 #define OPTION_CTLSOCK 1001
125 static const struct option longopts[] =
126 {
127 { "ctl_socket", required_argument, NULL, OPTION_CTLSOCK},
128 { "instance", required_argument, NULL, 'n'},
129 { 0 }
130 };
131
132 /* SIGHUP handler. */
133 static void
sighup(void)134 sighup(void)
135 {
136 log_info("SIGHUP received");
137
138 /*
139 * Do a full configuration reload. In other words, reset vty_conf
140 * and build a new configuartion from scratch.
141 */
142 ldp_config_reset(vty_conf);
143 vty_read_config(NULL, ldpd_di.config_file, config_default);
144 ldp_config_apply(NULL, vty_conf);
145 }
146
147 /* SIGINT / SIGTERM handler. */
148 static void
sigint(void)149 sigint(void)
150 {
151 log_info("SIGINT received");
152 ldpd_shutdown();
153 }
154
155 /* SIGUSR1 handler. */
156 static void
sigusr1(void)157 sigusr1(void)
158 {
159 zlog_rotate();
160 }
161
162 static struct quagga_signal_t ldp_signals[] =
163 {
164 {
165 .signal = SIGHUP,
166 .handler = &sighup,
167 },
168 {
169 .signal = SIGINT,
170 .handler = &sigint,
171 },
172 {
173 .signal = SIGTERM,
174 .handler = &sigint,
175 },
176 {
177 .signal = SIGUSR1,
178 .handler = &sigusr1,
179 }
180 };
181
182 static const struct frr_yang_module_info *const ldpd_yang_modules[] = {
183 &frr_filter_info,
184 &frr_vrf_info,
185 };
186
187 FRR_DAEMON_INFO(ldpd, LDP,
188 .vty_port = LDP_VTY_PORT,
189
190 .proghelp = "Implementation of the LDP protocol.",
191
192 .signals = ldp_signals,
193 .n_signals = array_size(ldp_signals),
194
195 .privs = &ldpd_privs,
196
197 .yang_modules = ldpd_yang_modules,
198 .n_yang_modules = array_size(ldpd_yang_modules),
199 )
200
ldp_config_fork_apply(struct thread * t)201 static int ldp_config_fork_apply(struct thread *t)
202 {
203 /*
204 * So the frr_config_fork() function schedules
205 * the read of the vty config( if there is a
206 * non-integrated config ) to be after the
207 * end of startup and we are starting the
208 * main process loop. We need to schedule
209 * the application of this if necessary
210 * after the read in of the config.
211 */
212 ldp_config_apply(NULL, vty_conf);
213
214 return 0;
215 }
216
217 int
main(int argc,char * argv[])218 main(int argc, char *argv[])
219 {
220 char *saved_argv0;
221 int lflag = 0, eflag = 0;
222 int pipe_parent2ldpe[2], pipe_parent2ldpe_sync[2];
223 int pipe_parent2lde[2], pipe_parent2lde_sync[2];
224 char *ctl_sock_name;
225 struct thread *thread = NULL;
226 bool ctl_sock_used = false;
227
228 snprintf(ctl_sock_path, sizeof(ctl_sock_path), LDPD_SOCKET,
229 "", "");
230
231 ldpd_process = PROC_MAIN;
232 log_procname = log_procnames[ldpd_process];
233
234 saved_argv0 = argv[0];
235 if (saved_argv0 == NULL)
236 saved_argv0 = (char *)"ldpd";
237
238 frr_preinit(&ldpd_di, argc, argv);
239 frr_opt_add("LEn:", longopts,
240 " --ctl_socket Override ctl socket path\n"
241 " -n, --instance Instance id\n");
242
243 while (1) {
244 int opt;
245
246 opt = frr_getopt(argc, argv, NULL);
247
248 if (opt == EOF)
249 break;
250
251 switch (opt) {
252 case 0:
253 break;
254 case OPTION_CTLSOCK:
255 ctl_sock_used = true;
256 ctl_sock_name = strrchr(LDPD_SOCKET, '/');
257 if (ctl_sock_name)
258 /* skip '/' */
259 ctl_sock_name++;
260 else
261 /*
262 * LDPD_SOCKET configured as relative path
263 * during config? Should really never happen for
264 * sensible config
265 */
266 ctl_sock_name = (char *)LDPD_SOCKET;
267 strlcpy(ctl_sock_path, optarg, sizeof(ctl_sock_path));
268 strlcat(ctl_sock_path, "/", sizeof(ctl_sock_path));
269 strlcat(ctl_sock_path, ctl_sock_name,
270 sizeof(ctl_sock_path));
271 break;
272 case 'n':
273 init.instance = atoi(optarg);
274 if (init.instance < 1)
275 exit(0);
276 break;
277 case 'L':
278 lflag = 1;
279 break;
280 case 'E':
281 eflag = 1;
282 break;
283 default:
284 frr_help_exit(1);
285 break;
286 }
287 }
288
289 if (ldpd_di.pathspace && !ctl_sock_used)
290 snprintf(ctl_sock_path, sizeof(ctl_sock_path), LDPD_SOCKET,
291 "/", ldpd_di.pathspace);
292
293 strlcpy(init.user, ldpd_privs.user, sizeof(init.user));
294 strlcpy(init.group, ldpd_privs.group, sizeof(init.group));
295 strlcpy(init.ctl_sock_path, ctl_sock_path, sizeof(init.ctl_sock_path));
296 strlcpy(init.zclient_serv_path, frr_zclientpath,
297 sizeof(init.zclient_serv_path));
298
299 argc -= optind;
300 if (argc > 0 || (lflag && eflag))
301 frr_help_exit(1);
302
303 /* check for root privileges */
304 if (geteuid() != 0) {
305 errno = EPERM;
306 perror(ldpd_di.progname);
307 exit(1);
308 }
309
310 if (lflag || eflag) {
311 struct zprivs_ids_t ids;
312
313 zprivs_preinit(&ldpd_privs);
314 zprivs_get_ids(&ids);
315
316 zlog_init(ldpd_di.progname, "LDP", 0,
317 ids.uid_normal, ids.gid_normal);
318 }
319 if (lflag)
320 lde();
321 else if (eflag)
322 ldpe();
323
324 if (socketpair(AF_UNIX, SOCK_STREAM, PF_UNSPEC, pipe_parent2ldpe) == -1)
325 fatal("socketpair");
326 if (socketpair(AF_UNIX, SOCK_STREAM, PF_UNSPEC,
327 pipe_parent2ldpe_sync) == -1)
328 fatal("socketpair");
329 if (socketpair(AF_UNIX, SOCK_STREAM, PF_UNSPEC, pipe_parent2lde) == -1)
330 fatal("socketpair");
331 if (socketpair(AF_UNIX, SOCK_STREAM, PF_UNSPEC,
332 pipe_parent2lde_sync) == -1)
333 fatal("socketpair");
334 sock_set_nonblock(pipe_parent2ldpe[0]);
335 sock_set_cloexec(pipe_parent2ldpe[0]);
336 sock_set_nonblock(pipe_parent2ldpe[1]);
337 sock_set_cloexec(pipe_parent2ldpe[1]);
338 sock_set_nonblock(pipe_parent2ldpe_sync[0]);
339 sock_set_cloexec(pipe_parent2ldpe_sync[0]);
340 sock_set_cloexec(pipe_parent2ldpe_sync[1]);
341 sock_set_nonblock(pipe_parent2lde[0]);
342 sock_set_cloexec(pipe_parent2lde[0]);
343 sock_set_nonblock(pipe_parent2lde[1]);
344 sock_set_cloexec(pipe_parent2lde[1]);
345 sock_set_nonblock(pipe_parent2lde_sync[0]);
346 sock_set_cloexec(pipe_parent2lde_sync[0]);
347 sock_set_cloexec(pipe_parent2lde_sync[1]);
348
349 /* start children */
350 lde_pid = start_child(PROC_LDE_ENGINE, saved_argv0,
351 pipe_parent2lde[1], pipe_parent2lde_sync[1]);
352 ldpe_pid = start_child(PROC_LDP_ENGINE, saved_argv0,
353 pipe_parent2ldpe[1], pipe_parent2ldpe_sync[1]);
354
355 master = frr_init();
356
357 vrf_init(NULL, NULL, NULL, NULL, NULL);
358 access_list_init();
359 ldp_vty_init();
360 ldp_zebra_init(master);
361
362 /*
363 * Create base configuration with sane defaults. All configuration
364 * requests (e.g. CLI) act on vty_conf and then call ldp_config_apply()
365 * to merge the changes into ldpd_conf, which contains the actual
366 * running configuration.
367 */
368 ldpd_conf = config_new_empty();
369 vty_conf = config_new_empty();
370 QOBJ_REG(vty_conf, ldpd_conf);
371
372 /* read configuration file and daemonize */
373 frr_config_fork();
374
375 /* apply configuration */
376 thread_add_event(master, ldp_config_fork_apply, NULL, 0, &thread);
377
378 /* setup pipes to children */
379 if ((iev_ldpe = calloc(1, sizeof(struct imsgev))) == NULL ||
380 (iev_ldpe_sync = calloc(1, sizeof(struct imsgev))) == NULL ||
381 (iev_lde = calloc(1, sizeof(struct imsgev))) == NULL ||
382 (iev_lde_sync = calloc(1, sizeof(struct imsgev))) == NULL)
383 fatal(NULL);
384 imsg_init(&iev_ldpe->ibuf, pipe_parent2ldpe[0]);
385 iev_ldpe->handler_read = main_dispatch_ldpe;
386 iev_ldpe->ev_read = NULL;
387 thread_add_read(master, iev_ldpe->handler_read, iev_ldpe, iev_ldpe->ibuf.fd,
388 &iev_ldpe->ev_read);
389 iev_ldpe->handler_write = ldp_write_handler;
390
391 imsg_init(&iev_ldpe_sync->ibuf, pipe_parent2ldpe_sync[0]);
392 iev_ldpe_sync->handler_read = main_dispatch_ldpe;
393 iev_ldpe_sync->ev_read = NULL;
394 thread_add_read(master, iev_ldpe_sync->handler_read, iev_ldpe_sync, iev_ldpe_sync->ibuf.fd,
395 &iev_ldpe_sync->ev_read);
396 iev_ldpe_sync->handler_write = ldp_write_handler;
397
398 imsg_init(&iev_lde->ibuf, pipe_parent2lde[0]);
399 iev_lde->handler_read = main_dispatch_lde;
400 iev_lde->ev_read = NULL;
401 thread_add_read(master, iev_lde->handler_read, iev_lde, iev_lde->ibuf.fd,
402 &iev_lde->ev_read);
403 iev_lde->handler_write = ldp_write_handler;
404
405 imsg_init(&iev_lde_sync->ibuf, pipe_parent2lde_sync[0]);
406 iev_lde_sync->handler_read = main_dispatch_lde;
407 iev_lde_sync->ev_read = NULL;
408 thread_add_read(master, iev_lde_sync->handler_read, iev_lde_sync, iev_lde_sync->ibuf.fd,
409 &iev_lde_sync->ev_read);
410 iev_lde_sync->handler_write = ldp_write_handler;
411
412 if (main_imsg_send_ipc_sockets(&iev_ldpe->ibuf, &iev_lde->ibuf))
413 fatal("could not establish imsg links");
414 main_imsg_compose_both(IMSG_DEBUG_UPDATE, &ldp_debug,
415 sizeof(ldp_debug));
416 main_imsg_compose_both(IMSG_INIT, &init, sizeof(init));
417 main_imsg_send_config(ldpd_conf);
418
419 if (ldpd_conf->ipv4.flags & F_LDPD_AF_ENABLED)
420 main_imsg_send_net_sockets(AF_INET);
421 if (ldpd_conf->ipv6.flags & F_LDPD_AF_ENABLED)
422 main_imsg_send_net_sockets(AF_INET6);
423
424 frr_run(master);
425
426 /* NOTREACHED */
427 return (0);
428 }
429
430 static void
ldpd_shutdown(void)431 ldpd_shutdown(void)
432 {
433 pid_t pid;
434 int status;
435
436 frr_early_fini();
437
438 /* close pipes */
439 msgbuf_clear(&iev_ldpe->ibuf.w);
440 close(iev_ldpe->ibuf.fd);
441 msgbuf_clear(&iev_lde->ibuf.w);
442 close(iev_lde->ibuf.fd);
443
444 config_clear(ldpd_conf);
445
446 ldp_config_reset(vty_conf);
447 QOBJ_UNREG(vty_conf);
448 free(vty_conf);
449
450 log_debug("waiting for children to terminate");
451
452 while (true) {
453 /* Wait for child process. */
454 pid = wait(&status);
455 if (pid == -1) {
456 /* We got interrupted, try again. */
457 if (errno == EINTR)
458 continue;
459 /* No more processes were found. */
460 if (errno == ECHILD)
461 break;
462
463 /* Unhandled errno condition. */
464 fatal("wait");
465 /* UNREACHABLE */
466 }
467
468 /* We found something, lets announce it. */
469 if (WIFSIGNALED(status))
470 log_warnx("%s terminated; signal %d",
471 (pid == lde_pid ? "label decision engine"
472 : "ldp engine"),
473 WTERMSIG(status));
474
475 /* Repeat until there are no more child processes. */
476 }
477
478 free(iev_ldpe);
479 free(iev_lde);
480
481 log_info("terminating");
482
483 vrf_terminate();
484 access_list_reset();
485 ldp_zebra_destroy();
486
487 frr_fini();
488 exit(0);
489 }
490
491 static pid_t
start_child(enum ldpd_process p,char * argv0,int fd_async,int fd_sync)492 start_child(enum ldpd_process p, char *argv0, int fd_async, int fd_sync)
493 {
494 char *argv[7];
495 int argc = 0, nullfd;
496 pid_t pid;
497
498 pid = fork();
499 switch (pid) {
500 case -1:
501 fatal("cannot fork");
502 case 0:
503 break;
504 default:
505 close(fd_async);
506 close(fd_sync);
507 return (pid);
508 }
509
510 nullfd = open("/dev/null", O_RDONLY | O_NOCTTY);
511 if (nullfd == -1) {
512 flog_err_sys(EC_LIB_SYSTEM_CALL,
513 "%s: failed to open /dev/null: %s", __func__,
514 safe_strerror(errno));
515 } else {
516 dup2(nullfd, 0);
517 dup2(nullfd, 1);
518 dup2(nullfd, 2);
519 close(nullfd);
520 }
521
522 if (dup2(fd_async, LDPD_FD_ASYNC) == -1)
523 fatal("cannot setup imsg async fd");
524 if (dup2(fd_sync, LDPD_FD_SYNC) == -1)
525 fatal("cannot setup imsg sync fd");
526
527 argv[argc++] = argv0;
528 switch (p) {
529 case PROC_MAIN:
530 fatalx("Can not start main process");
531 case PROC_LDE_ENGINE:
532 argv[argc++] = (char *)"-L";
533 break;
534 case PROC_LDP_ENGINE:
535 argv[argc++] = (char *)"-E";
536 break;
537 }
538
539 argv[argc++] = (char *)"-u";
540 argv[argc++] = (char *)ldpd_privs.user;
541 argv[argc++] = (char *)"-g";
542 argv[argc++] = (char *)ldpd_privs.group;
543 argv[argc++] = NULL;
544
545 execvp(argv0, argv);
546 fatal("execvp");
547 }
548
549 /* imsg handling */
550 /* ARGSUSED */
551 static int
main_dispatch_ldpe(struct thread * thread)552 main_dispatch_ldpe(struct thread *thread)
553 {
554 struct imsgev *iev = THREAD_ARG(thread);
555 struct imsgbuf *ibuf = &iev->ibuf;
556 struct imsg imsg;
557 int af;
558 ssize_t n;
559 int shut = 0;
560
561 iev->ev_read = NULL;
562
563 if ((n = imsg_read(ibuf)) == -1 && errno != EAGAIN)
564 fatal("imsg_read error");
565 if (n == 0) /* connection closed */
566 shut = 1;
567
568 for (;;) {
569 if ((n = imsg_get(ibuf, &imsg)) == -1)
570 fatal("imsg_get");
571
572 if (n == 0)
573 break;
574
575 switch (imsg.hdr.type) {
576 case IMSG_LOG:
577 logit(imsg.hdr.pid, "%s", (const char *)imsg.data);
578 break;
579 case IMSG_REQUEST_SOCKETS:
580 af = imsg.hdr.pid;
581 main_imsg_send_net_sockets(af);
582 break;
583 case IMSG_ACL_CHECK:
584 if (imsg.hdr.len != IMSG_HEADER_SIZE +
585 sizeof(struct acl_check))
586 fatalx("IMSG_ACL_CHECK imsg with wrong len");
587 ldp_acl_reply(iev, (struct acl_check *)imsg.data);
588 break;
589 default:
590 log_debug("%s: error handling imsg %d", __func__,
591 imsg.hdr.type);
592 break;
593 }
594 imsg_free(&imsg);
595 }
596 if (!shut)
597 imsg_event_add(iev);
598 else {
599 /* this pipe is dead, so remove the event handlers and exit */
600 THREAD_READ_OFF(iev->ev_read);
601 THREAD_WRITE_OFF(iev->ev_write);
602 ldpe_pid = 0;
603 if (lde_pid == 0)
604 ldpd_shutdown();
605 else
606 kill(lde_pid, SIGTERM);
607 }
608
609 return (0);
610 }
611
612 /* ARGSUSED */
613 static int
main_dispatch_lde(struct thread * thread)614 main_dispatch_lde(struct thread *thread)
615 {
616 struct imsgev *iev = THREAD_ARG(thread);
617 struct imsgbuf *ibuf = &iev->ibuf;
618 struct imsg imsg;
619 ssize_t n;
620 int shut = 0;
621
622 iev->ev_read = NULL;
623
624 if ((n = imsg_read(ibuf)) == -1 && errno != EAGAIN)
625 fatal("imsg_read error");
626 if (n == 0) /* connection closed */
627 shut = 1;
628
629 for (;;) {
630 if ((n = imsg_get(ibuf, &imsg)) == -1)
631 fatal("imsg_get");
632
633 if (n == 0)
634 break;
635
636 switch (imsg.hdr.type) {
637 case IMSG_LOG:
638 logit(imsg.hdr.pid, "%s", (const char *)imsg.data);
639 break;
640 case IMSG_KLABEL_CHANGE:
641 if (imsg.hdr.len - IMSG_HEADER_SIZE !=
642 sizeof(struct kroute))
643 fatalx("invalid size of IMSG_KLABEL_CHANGE");
644 if (kr_change(imsg.data))
645 log_warnx("%s: error changing route", __func__);
646 break;
647 case IMSG_KLABEL_DELETE:
648 if (imsg.hdr.len - IMSG_HEADER_SIZE !=
649 sizeof(struct kroute))
650 fatalx("invalid size of IMSG_KLABEL_DELETE");
651 if (kr_delete(imsg.data))
652 log_warnx("%s: error deleting route", __func__);
653 break;
654 case IMSG_KPW_ADD:
655 case IMSG_KPW_DELETE:
656 case IMSG_KPW_SET:
657 case IMSG_KPW_UNSET:
658 if (imsg.hdr.len - IMSG_HEADER_SIZE !=
659 sizeof(struct zapi_pw))
660 fatalx("invalid size of IMSG_KPWLABEL_CHANGE");
661
662 switch (imsg.hdr.type) {
663 case IMSG_KPW_ADD:
664 if (kmpw_add(imsg.data))
665 log_warnx("%s: error adding pseudowire", __func__);
666 break;
667 case IMSG_KPW_DELETE:
668 if (kmpw_del(imsg.data))
669 log_warnx("%s: error deleting pseudowire", __func__);
670 break;
671 case IMSG_KPW_SET:
672 if (kmpw_set(imsg.data))
673 log_warnx("%s: error setting pseudowire", __func__);
674 break;
675 case IMSG_KPW_UNSET:
676 if (kmpw_unset(imsg.data))
677 log_warnx("%s: error unsetting pseudowire", __func__);
678 break;
679 }
680 break;
681 case IMSG_ACL_CHECK:
682 if (imsg.hdr.len != IMSG_HEADER_SIZE +
683 sizeof(struct acl_check))
684 fatalx("IMSG_ACL_CHECK imsg with wrong len");
685 ldp_acl_reply(iev, (struct acl_check *)imsg.data);
686 break;
687 default:
688 log_debug("%s: error handling imsg %d", __func__,
689 imsg.hdr.type);
690 break;
691 }
692 imsg_free(&imsg);
693 }
694 if (!shut)
695 imsg_event_add(iev);
696 else {
697 /* this pipe is dead, so remove the event handlers and exit */
698 THREAD_READ_OFF(iev->ev_read);
699 THREAD_WRITE_OFF(iev->ev_write);
700 lde_pid = 0;
701 if (ldpe_pid == 0)
702 ldpd_shutdown();
703 else
704 kill(ldpe_pid, SIGTERM);
705 }
706
707 return (0);
708 }
709
710 /* ARGSUSED */
711 int
ldp_write_handler(struct thread * thread)712 ldp_write_handler(struct thread *thread)
713 {
714 struct imsgev *iev = THREAD_ARG(thread);
715 struct imsgbuf *ibuf = &iev->ibuf;
716 ssize_t n;
717
718 iev->ev_write = NULL;
719
720 if ((n = msgbuf_write(&ibuf->w)) == -1 && errno != EAGAIN)
721 fatal("msgbuf_write");
722 if (n == 0) {
723 /* this pipe is dead, so remove the event handlers */
724 THREAD_READ_OFF(iev->ev_read);
725 THREAD_WRITE_OFF(iev->ev_write);
726 return (0);
727 }
728
729 imsg_event_add(iev);
730
731 return (0);
732 }
733
734 void
main_imsg_compose_ldpe(int type,pid_t pid,void * data,uint16_t datalen)735 main_imsg_compose_ldpe(int type, pid_t pid, void *data, uint16_t datalen)
736 {
737 if (iev_ldpe == NULL)
738 return;
739 imsg_compose_event(iev_ldpe, type, 0, pid, -1, data, datalen);
740 }
741
742 void
main_imsg_compose_lde(int type,pid_t pid,void * data,uint16_t datalen)743 main_imsg_compose_lde(int type, pid_t pid, void *data, uint16_t datalen)
744 {
745 imsg_compose_event(iev_lde, type, 0, pid, -1, data, datalen);
746 }
747
748 int
main_imsg_compose_both(enum imsg_type type,void * buf,uint16_t len)749 main_imsg_compose_both(enum imsg_type type, void *buf, uint16_t len)
750 {
751 if (iev_ldpe == NULL || iev_lde == NULL)
752 return (0);
753 if (imsg_compose_event(iev_ldpe, type, 0, 0, -1, buf, len) == -1)
754 return (-1);
755 if (imsg_compose_event(iev_lde, type, 0, 0, -1, buf, len) == -1)
756 return (-1);
757 return (0);
758 }
759
760 void
imsg_event_add(struct imsgev * iev)761 imsg_event_add(struct imsgev *iev)
762 {
763 if (iev->handler_read)
764 thread_add_read(master, iev->handler_read, iev, iev->ibuf.fd,
765 &iev->ev_read);
766
767 if (iev->handler_write && iev->ibuf.w.queued)
768 thread_add_write(master, iev->handler_write, iev,
769 iev->ibuf.fd, &iev->ev_write);
770 }
771
772 int
imsg_compose_event(struct imsgev * iev,uint16_t type,uint32_t peerid,pid_t pid,int fd,void * data,uint16_t datalen)773 imsg_compose_event(struct imsgev *iev, uint16_t type, uint32_t peerid,
774 pid_t pid, int fd, void *data, uint16_t datalen)
775 {
776 int ret;
777
778 if ((ret = imsg_compose(&iev->ibuf, type, peerid,
779 pid, fd, data, datalen)) != -1)
780 imsg_event_add(iev);
781 return (ret);
782 }
783
784 void
evbuf_enqueue(struct evbuf * eb,struct ibuf * buf)785 evbuf_enqueue(struct evbuf *eb, struct ibuf *buf)
786 {
787 ibuf_close(&eb->wbuf, buf);
788 evbuf_event_add(eb);
789 }
790
791 void
evbuf_event_add(struct evbuf * eb)792 evbuf_event_add(struct evbuf *eb)
793 {
794 if (eb->wbuf.queued)
795 thread_add_write(master, eb->handler, eb->arg, eb->wbuf.fd,
796 &eb->ev);
797 }
798
799 void
evbuf_init(struct evbuf * eb,int fd,int (* handler)(struct thread *),void * arg)800 evbuf_init(struct evbuf *eb, int fd, int (*handler)(struct thread *),
801 void *arg)
802 {
803 msgbuf_init(&eb->wbuf);
804 eb->wbuf.fd = fd;
805 eb->handler = handler;
806 eb->arg = arg;
807 }
808
809 void
evbuf_clear(struct evbuf * eb)810 evbuf_clear(struct evbuf *eb)
811 {
812 THREAD_WRITE_OFF(eb->ev);
813 msgbuf_clear(&eb->wbuf);
814 eb->wbuf.fd = -1;
815 }
816
817 static int
main_imsg_send_ipc_sockets(struct imsgbuf * ldpe_buf,struct imsgbuf * lde_buf)818 main_imsg_send_ipc_sockets(struct imsgbuf *ldpe_buf, struct imsgbuf *lde_buf)
819 {
820 int pipe_ldpe2lde[2];
821
822 if (socketpair(AF_UNIX, SOCK_STREAM, PF_UNSPEC, pipe_ldpe2lde) == -1)
823 return (-1);
824 sock_set_nonblock(pipe_ldpe2lde[0]);
825 sock_set_nonblock(pipe_ldpe2lde[1]);
826
827 if (imsg_compose(ldpe_buf, IMSG_SOCKET_IPC, 0, 0, pipe_ldpe2lde[0],
828 NULL, 0) == -1)
829 return (-1);
830 if (imsg_compose(lde_buf, IMSG_SOCKET_IPC, 0, 0, pipe_ldpe2lde[1],
831 NULL, 0) == -1)
832 return (-1);
833
834 return (0);
835 }
836
837 static void
main_imsg_send_net_sockets(int af)838 main_imsg_send_net_sockets(int af)
839 {
840 if (!ldp_addrisset(af, &(ldp_af_conf_get(ldpd_conf, af))->trans_addr))
841 return;
842
843 main_imsg_send_net_socket(af, LDP_SOCKET_DISC);
844 main_imsg_send_net_socket(af, LDP_SOCKET_EDISC);
845 main_imsg_send_net_socket(af, LDP_SOCKET_SESSION);
846 imsg_compose_event(iev_ldpe, IMSG_SETUP_SOCKETS, af, 0, -1, NULL, 0);
847 }
848
849 static void
main_imsg_send_net_socket(int af,enum socket_type type)850 main_imsg_send_net_socket(int af, enum socket_type type)
851 {
852 int fd;
853
854 fd = ldp_create_socket(af, type);
855 if (fd == -1) {
856 log_warnx("%s: failed to create %s socket for address-family %s", __func__, socket_name(type), af_name(af));
857 return;
858 }
859
860 imsg_compose_event(iev_ldpe, IMSG_SOCKET_NET, af, 0, fd, &type,
861 sizeof(type));
862 }
863
864 int
ldp_acl_request(struct imsgev * iev,char * acl_name,int af,union ldpd_addr * addr,uint8_t prefixlen)865 ldp_acl_request(struct imsgev *iev, char *acl_name, int af,
866 union ldpd_addr *addr, uint8_t prefixlen)
867 {
868 struct imsg imsg;
869 struct acl_check acl_check;
870
871 if (acl_name[0] == '\0')
872 return FILTER_PERMIT;
873
874 /* build request */
875 strlcpy(acl_check.acl, acl_name, sizeof(acl_check.acl));
876 acl_check.af = af;
877 acl_check.addr = *addr;
878 acl_check.prefixlen = prefixlen;
879
880 /* send (blocking) */
881 imsg_compose_event(iev, IMSG_ACL_CHECK, 0, 0, -1, &acl_check,
882 sizeof(acl_check));
883 imsg_flush(&iev->ibuf);
884
885 /* receive (blocking) and parse result */
886 if (imsg_read(&iev->ibuf) == -1)
887 fatal("imsg_read error");
888 if (imsg_get(&iev->ibuf, &imsg) == -1)
889 fatal("imsg_get");
890 if (imsg.hdr.type != IMSG_ACL_CHECK ||
891 imsg.hdr.len != IMSG_HEADER_SIZE + sizeof(int))
892 fatalx("ldp_acl_request: invalid response");
893
894 return (*((int *)imsg.data));
895 }
896
897 void
ldp_acl_reply(struct imsgev * iev,struct acl_check * acl_check)898 ldp_acl_reply(struct imsgev *iev, struct acl_check *acl_check)
899 {
900 struct access_list *alist;
901 struct prefix prefix;
902 int result;
903
904 alist = access_list_lookup(family2afi(acl_check->af), acl_check->acl);
905 if (alist == NULL)
906 result = FILTER_DENY;
907 else {
908 prefix.family = acl_check->af;
909 switch (prefix.family) {
910 case AF_INET:
911 prefix.u.prefix4 = acl_check->addr.v4;
912 break;
913 case AF_INET6:
914 prefix.u.prefix6 = acl_check->addr.v6;
915 break;
916 default:
917 fatalx("ldp_acl_reply: unknown af");
918 }
919 prefix.prefixlen = acl_check->prefixlen;
920 result = access_list_apply(alist, &prefix);
921 }
922
923 imsg_compose_event(iev, IMSG_ACL_CHECK, 0, 0, -1, &result,
924 sizeof(result));
925 }
926
927 struct ldpd_af_conf *
ldp_af_conf_get(struct ldpd_conf * xconf,int af)928 ldp_af_conf_get(struct ldpd_conf *xconf, int af)
929 {
930 switch (af) {
931 case AF_INET:
932 return (&xconf->ipv4);
933 case AF_INET6:
934 return (&xconf->ipv6);
935 default:
936 fatalx("ldp_af_conf_get: unknown af");
937 }
938 }
939
940 struct ldpd_af_global *
ldp_af_global_get(struct ldpd_global * xglobal,int af)941 ldp_af_global_get(struct ldpd_global *xglobal, int af)
942 {
943 switch (af) {
944 case AF_INET:
945 return (&xglobal->ipv4);
946 case AF_INET6:
947 return (&xglobal->ipv6);
948 default:
949 fatalx("ldp_af_global_get: unknown af");
950 }
951 }
952
953 int
ldp_is_dual_stack(struct ldpd_conf * xconf)954 ldp_is_dual_stack(struct ldpd_conf *xconf)
955 {
956 return ((xconf->ipv4.flags & F_LDPD_AF_ENABLED) &&
957 (xconf->ipv6.flags & F_LDPD_AF_ENABLED));
958 }
959
960 in_addr_t
ldp_rtr_id_get(struct ldpd_conf * xconf)961 ldp_rtr_id_get(struct ldpd_conf *xconf)
962 {
963 if (xconf->rtr_id.s_addr != INADDR_ANY)
964 return (xconf->rtr_id.s_addr);
965 else
966 return (global.rtr_id.s_addr);
967 }
968
969 static int
main_imsg_send_config(struct ldpd_conf * xconf)970 main_imsg_send_config(struct ldpd_conf *xconf)
971 {
972 struct iface *iface;
973 struct tnbr *tnbr;
974 struct nbr_params *nbrp;
975 struct l2vpn *l2vpn;
976 struct l2vpn_if *lif;
977 struct l2vpn_pw *pw;
978
979 if (main_imsg_compose_both(IMSG_RECONF_CONF, xconf,
980 sizeof(*xconf)) == -1)
981 return (-1);
982
983 RB_FOREACH(iface, iface_head, &xconf->iface_tree) {
984 if (main_imsg_compose_both(IMSG_RECONF_IFACE, iface,
985 sizeof(*iface)) == -1)
986 return (-1);
987 }
988
989 RB_FOREACH(tnbr, tnbr_head, &xconf->tnbr_tree) {
990 if (main_imsg_compose_both(IMSG_RECONF_TNBR, tnbr,
991 sizeof(*tnbr)) == -1)
992 return (-1);
993 }
994
995 RB_FOREACH(nbrp, nbrp_head, &xconf->nbrp_tree) {
996 if (main_imsg_compose_both(IMSG_RECONF_NBRP, nbrp,
997 sizeof(*nbrp)) == -1)
998 return (-1);
999 }
1000
1001 RB_FOREACH(l2vpn, l2vpn_head, &xconf->l2vpn_tree) {
1002 if (main_imsg_compose_both(IMSG_RECONF_L2VPN, l2vpn,
1003 sizeof(*l2vpn)) == -1)
1004 return (-1);
1005
1006 RB_FOREACH(lif, l2vpn_if_head, &l2vpn->if_tree) {
1007 if (main_imsg_compose_both(IMSG_RECONF_L2VPN_IF, lif,
1008 sizeof(*lif)) == -1)
1009 return (-1);
1010 }
1011 RB_FOREACH(pw, l2vpn_pw_head, &l2vpn->pw_tree) {
1012 if (main_imsg_compose_both(IMSG_RECONF_L2VPN_PW, pw,
1013 sizeof(*pw)) == -1)
1014 return (-1);
1015 }
1016 RB_FOREACH(pw, l2vpn_pw_head, &l2vpn->pw_inactive_tree) {
1017 if (main_imsg_compose_both(IMSG_RECONF_L2VPN_IPW, pw,
1018 sizeof(*pw)) == -1)
1019 return (-1);
1020 }
1021 }
1022
1023 if (main_imsg_compose_both(IMSG_RECONF_END, NULL, 0) == -1)
1024 return (-1);
1025
1026 return (0);
1027 }
1028
1029 int
ldp_config_apply(struct vty * vty,struct ldpd_conf * xconf)1030 ldp_config_apply(struct vty *vty, struct ldpd_conf *xconf)
1031 {
1032 /*
1033 * When reading from a configuration file (startup and sighup), we
1034 * call merge_config() only once after the whole config has been read.
1035 * This is the optimal and least disruptive way to update the running
1036 * configuration.
1037 */
1038 if (vty && vty->type == VTY_FILE)
1039 return (0);
1040
1041 ldp_config_normalize(xconf);
1042
1043 if (main_imsg_send_config(xconf) == -1)
1044 return (-1);
1045
1046 merge_config(ldpd_conf, xconf);
1047
1048 return (0);
1049 }
1050
1051 static void
ldp_config_normalize(struct ldpd_conf * xconf)1052 ldp_config_normalize(struct ldpd_conf *xconf)
1053 {
1054 struct iface *iface, *itmp;
1055 struct nbr_params *nbrp, *ntmp;
1056 struct l2vpn *l2vpn;
1057 struct l2vpn_pw *pw, *ptmp;
1058
1059 if (!(xconf->flags & F_LDPD_ENABLED))
1060 ldp_config_reset_main(xconf);
1061 else {
1062 if (!(xconf->ipv4.flags & F_LDPD_AF_ENABLED))
1063 ldp_config_reset_af(xconf, AF_INET);
1064 if (!(xconf->ipv6.flags & F_LDPD_AF_ENABLED))
1065 ldp_config_reset_af(xconf, AF_INET6);
1066
1067 RB_FOREACH_SAFE(iface, iface_head, &xconf->iface_tree, itmp) {
1068 if (iface->ipv4.enabled || iface->ipv6.enabled)
1069 continue;
1070
1071 QOBJ_UNREG(iface);
1072 RB_REMOVE(iface_head, &vty_conf->iface_tree, iface);
1073 free(iface);
1074 }
1075
1076 RB_FOREACH_SAFE(nbrp, nbrp_head, &xconf->nbrp_tree, ntmp) {
1077 if (nbrp->flags & (F_NBRP_KEEPALIVE|F_NBRP_GTSM))
1078 continue;
1079 if (nbrp->auth.method != AUTH_NONE)
1080 continue;
1081
1082 QOBJ_UNREG(nbrp);
1083 RB_REMOVE(nbrp_head, &vty_conf->nbrp_tree, nbrp);
1084 free(nbrp);
1085 }
1086 }
1087
1088 RB_FOREACH(l2vpn, l2vpn_head, &xconf->l2vpn_tree) {
1089 RB_FOREACH_SAFE(pw, l2vpn_pw_head, &l2vpn->pw_tree, ptmp) {
1090 if (!(pw->flags & F_PW_STATIC_NBR_ADDR)) {
1091 pw->af = AF_INET;
1092 pw->addr.v4 = pw->lsr_id;
1093 }
1094
1095 if (pw->lsr_id.s_addr != INADDR_ANY && pw->pwid != 0)
1096 continue;
1097 RB_REMOVE(l2vpn_pw_head, &l2vpn->pw_tree, pw);
1098 RB_INSERT(l2vpn_pw_head, &l2vpn->pw_inactive_tree, pw);
1099 }
1100 RB_FOREACH_SAFE(pw, l2vpn_pw_head, &l2vpn->pw_inactive_tree,
1101 ptmp) {
1102 if (!(pw->flags & F_PW_STATIC_NBR_ADDR)) {
1103 pw->af = AF_INET;
1104 pw->addr.v4 = pw->lsr_id;
1105 }
1106
1107 if (pw->lsr_id.s_addr == INADDR_ANY || pw->pwid == 0)
1108 continue;
1109 RB_REMOVE(l2vpn_pw_head, &l2vpn->pw_inactive_tree, pw);
1110 RB_INSERT(l2vpn_pw_head, &l2vpn->pw_tree, pw);
1111 }
1112 }
1113 }
1114
1115 static void
ldp_config_reset(struct ldpd_conf * conf)1116 ldp_config_reset(struct ldpd_conf *conf)
1117 {
1118 ldp_config_reset_main(conf);
1119 ldp_config_reset_l2vpns(conf);
1120 }
1121
1122 static void
ldp_config_reset_main(struct ldpd_conf * conf)1123 ldp_config_reset_main(struct ldpd_conf *conf)
1124 {
1125 struct iface *iface;
1126 struct nbr_params *nbrp;
1127
1128 while (!RB_EMPTY(iface_head, &conf->iface_tree)) {
1129 iface = RB_ROOT(iface_head, &conf->iface_tree);
1130
1131 QOBJ_UNREG(iface);
1132 RB_REMOVE(iface_head, &conf->iface_tree, iface);
1133 free(iface);
1134 }
1135
1136 while (!RB_EMPTY(nbrp_head, &conf->nbrp_tree)) {
1137 nbrp = RB_ROOT(nbrp_head, &conf->nbrp_tree);
1138
1139 QOBJ_UNREG(nbrp);
1140 RB_REMOVE(nbrp_head, &conf->nbrp_tree, nbrp);
1141 free(nbrp);
1142 }
1143
1144 conf->rtr_id.s_addr = INADDR_ANY;
1145 ldp_config_reset_af(conf, AF_INET);
1146 ldp_config_reset_af(conf, AF_INET6);
1147 conf->lhello_holdtime = LINK_DFLT_HOLDTIME;
1148 conf->lhello_interval = DEFAULT_HELLO_INTERVAL;
1149 conf->thello_holdtime = TARGETED_DFLT_HOLDTIME;
1150 conf->thello_interval = DEFAULT_HELLO_INTERVAL;
1151 conf->trans_pref = DUAL_STACK_LDPOV6;
1152 conf->flags = 0;
1153 }
1154
1155 static void
ldp_config_reset_af(struct ldpd_conf * conf,int af)1156 ldp_config_reset_af(struct ldpd_conf *conf, int af)
1157 {
1158 struct ldpd_af_conf *af_conf;
1159 struct iface *iface;
1160 struct iface_af *ia;
1161 struct tnbr *tnbr, *ttmp;
1162
1163 RB_FOREACH(iface, iface_head, &conf->iface_tree) {
1164 ia = iface_af_get(iface, af);
1165 ia->enabled = 0;
1166 }
1167
1168 RB_FOREACH_SAFE(tnbr, tnbr_head, &conf->tnbr_tree, ttmp) {
1169 if (tnbr->af != af)
1170 continue;
1171
1172 QOBJ_UNREG(tnbr);
1173 RB_REMOVE(tnbr_head, &conf->tnbr_tree, tnbr);
1174 free(tnbr);
1175 }
1176
1177 af_conf = ldp_af_conf_get(conf, af);
1178 af_conf->keepalive = 180;
1179 af_conf->lhello_holdtime = 0;
1180 af_conf->lhello_interval = 0;
1181 af_conf->thello_holdtime = 0;
1182 af_conf->thello_interval = 0;
1183 memset(&af_conf->trans_addr, 0, sizeof(af_conf->trans_addr));
1184 af_conf->flags = 0;
1185 }
1186
1187 static void
ldp_config_reset_l2vpns(struct ldpd_conf * conf)1188 ldp_config_reset_l2vpns(struct ldpd_conf *conf)
1189 {
1190 struct l2vpn *l2vpn;
1191 struct l2vpn_if *lif;
1192 struct l2vpn_pw *pw;
1193
1194 while (!RB_EMPTY(l2vpn_head, &conf->l2vpn_tree)) {
1195 l2vpn = RB_ROOT(l2vpn_head, &conf->l2vpn_tree);
1196 while (!RB_EMPTY(l2vpn_if_head, &l2vpn->if_tree)) {
1197 lif = RB_ROOT(l2vpn_if_head, &l2vpn->if_tree);
1198
1199 QOBJ_UNREG(lif);
1200 RB_REMOVE(l2vpn_if_head, &l2vpn->if_tree, lif);
1201 free(lif);
1202 }
1203 while (!RB_EMPTY(l2vpn_pw_head, &l2vpn->pw_tree)) {
1204 pw = RB_ROOT(l2vpn_pw_head, &l2vpn->pw_tree);
1205
1206 QOBJ_UNREG(pw);
1207 RB_REMOVE(l2vpn_pw_head, &l2vpn->pw_tree, pw);
1208 free(pw);
1209 }
1210 while (!RB_EMPTY(l2vpn_pw_head, &l2vpn->pw_inactive_tree)) {
1211 pw = RB_ROOT(l2vpn_pw_head, &l2vpn->pw_inactive_tree);
1212
1213 QOBJ_UNREG(pw);
1214 RB_REMOVE(l2vpn_pw_head, &l2vpn->pw_inactive_tree, pw);
1215 free(pw);
1216 }
1217 QOBJ_UNREG(l2vpn);
1218 RB_REMOVE(l2vpn_head, &conf->l2vpn_tree, l2vpn);
1219 free(l2vpn);
1220 }
1221 }
1222
1223 void
ldp_clear_config(struct ldpd_conf * xconf)1224 ldp_clear_config(struct ldpd_conf *xconf)
1225 {
1226 struct iface *iface;
1227 struct tnbr *tnbr;
1228 struct nbr_params *nbrp;
1229 struct l2vpn *l2vpn;
1230
1231 while (!RB_EMPTY(iface_head, &xconf->iface_tree)) {
1232 iface = RB_ROOT(iface_head, &xconf->iface_tree);
1233
1234 RB_REMOVE(iface_head, &xconf->iface_tree, iface);
1235 free(iface);
1236 }
1237 while (!RB_EMPTY(tnbr_head, &xconf->tnbr_tree)) {
1238 tnbr = RB_ROOT(tnbr_head, &xconf->tnbr_tree);
1239
1240 RB_REMOVE(tnbr_head, &xconf->tnbr_tree, tnbr);
1241 free(tnbr);
1242 }
1243 while (!RB_EMPTY(nbrp_head, &xconf->nbrp_tree)) {
1244 nbrp = RB_ROOT(nbrp_head, &xconf->nbrp_tree);
1245
1246 RB_REMOVE(nbrp_head, &xconf->nbrp_tree, nbrp);
1247 free(nbrp);
1248 }
1249 while (!RB_EMPTY(l2vpn_head, &xconf->l2vpn_tree)) {
1250 l2vpn = RB_ROOT(l2vpn_head, &xconf->l2vpn_tree);
1251
1252 RB_REMOVE(l2vpn_head, &xconf->l2vpn_tree, l2vpn);
1253 l2vpn_del(l2vpn);
1254 }
1255
1256 free(xconf);
1257 }
1258
1259 #define COPY(a, b) do { \
1260 a = malloc(sizeof(*a)); \
1261 if (a == NULL) \
1262 fatal(__func__); \
1263 *a = *b; \
1264 } while (0)
1265
1266 void
merge_config(struct ldpd_conf * conf,struct ldpd_conf * xconf)1267 merge_config(struct ldpd_conf *conf, struct ldpd_conf *xconf)
1268 {
1269 merge_global(conf, xconf);
1270 merge_af(AF_INET, &conf->ipv4, &xconf->ipv4);
1271 merge_af(AF_INET6, &conf->ipv6, &xconf->ipv6);
1272 merge_ifaces(conf, xconf);
1273 merge_tnbrs(conf, xconf);
1274 merge_nbrps(conf, xconf);
1275 merge_l2vpns(conf, xconf);
1276 }
1277
1278 static void
merge_global(struct ldpd_conf * conf,struct ldpd_conf * xconf)1279 merge_global(struct ldpd_conf *conf, struct ldpd_conf *xconf)
1280 {
1281 /* change of router-id requires resetting all neighborships */
1282 if (conf->rtr_id.s_addr != xconf->rtr_id.s_addr) {
1283 if (ldpd_process == PROC_LDP_ENGINE) {
1284 ldpe_reset_nbrs(AF_UNSPEC);
1285 if (conf->rtr_id.s_addr == INADDR_ANY ||
1286 xconf->rtr_id.s_addr == INADDR_ANY) {
1287 if_update_all(AF_UNSPEC);
1288 tnbr_update_all(AF_UNSPEC);
1289 }
1290 }
1291 conf->rtr_id = xconf->rtr_id;
1292 }
1293
1294 /*
1295 * Configuration of ordered-control or independent-control
1296 * requires resetting all neighborships.
1297 */
1298 if ((conf->flags & F_LDPD_ORDERED_CONTROL) !=
1299 (xconf->flags & F_LDPD_ORDERED_CONTROL))
1300 ldpe_reset_nbrs(AF_UNSPEC);
1301
1302 conf->lhello_holdtime = xconf->lhello_holdtime;
1303 conf->lhello_interval = xconf->lhello_interval;
1304 conf->thello_holdtime = xconf->thello_holdtime;
1305 conf->thello_interval = xconf->thello_interval;
1306
1307 if (conf->trans_pref != xconf->trans_pref) {
1308 if (ldpd_process == PROC_LDP_ENGINE)
1309 ldpe_reset_ds_nbrs();
1310 conf->trans_pref = xconf->trans_pref;
1311 }
1312
1313 if ((conf->flags & F_LDPD_DS_CISCO_INTEROP) !=
1314 (xconf->flags & F_LDPD_DS_CISCO_INTEROP)) {
1315 if (ldpd_process == PROC_LDP_ENGINE)
1316 ldpe_reset_ds_nbrs();
1317 }
1318
1319 conf->flags = xconf->flags;
1320 }
1321
1322 static void
merge_af(int af,struct ldpd_af_conf * af_conf,struct ldpd_af_conf * xa)1323 merge_af(int af, struct ldpd_af_conf *af_conf, struct ldpd_af_conf *xa)
1324 {
1325 int stop_init_backoff = 0;
1326 int remove_dynamic_tnbrs = 0;
1327 int change_egress_label = 0;
1328 int change_host_label = 0;
1329 int reset_nbrs_ipv4 = 0;
1330 int reset_nbrs = 0;
1331 int update_sockets = 0;
1332 int change_ldp_disabled = 0;
1333
1334 /* update timers */
1335 if (af_conf->keepalive != xa->keepalive) {
1336 af_conf->keepalive = xa->keepalive;
1337 stop_init_backoff = 1;
1338 }
1339 af_conf->lhello_holdtime = xa->lhello_holdtime;
1340 af_conf->lhello_interval = xa->lhello_interval;
1341 af_conf->thello_holdtime = xa->thello_holdtime;
1342 af_conf->thello_interval = xa->thello_interval;
1343
1344 /* update flags */
1345 if ((af_conf->flags & F_LDPD_AF_THELLO_ACCEPT) &&
1346 !(xa->flags & F_LDPD_AF_THELLO_ACCEPT))
1347 remove_dynamic_tnbrs = 1;
1348 if ((af_conf->flags & F_LDPD_AF_NO_GTSM) !=
1349 (xa->flags & F_LDPD_AF_NO_GTSM)) {
1350 if (af == AF_INET6)
1351 /* need to set/unset IPV6_MINHOPCOUNT */
1352 update_sockets = 1;
1353 else
1354 /* for LDPv4 just resetting the neighbors is enough */
1355 reset_nbrs_ipv4 = 1;
1356 }
1357 if ((af_conf->flags & F_LDPD_AF_EXPNULL) !=
1358 (xa->flags & F_LDPD_AF_EXPNULL))
1359 change_egress_label = 1;
1360
1361 /* changing config of host only fec filtering */
1362 if ((af_conf->flags & F_LDPD_AF_ALLOCHOSTONLY)
1363 != (xa->flags & F_LDPD_AF_ALLOCHOSTONLY))
1364 change_host_label = 1;
1365
1366 /* disabling LDP for address family */
1367 if ((af_conf->flags & F_LDPD_AF_ENABLED) &&
1368 !(xa->flags & F_LDPD_AF_ENABLED))
1369 change_ldp_disabled = 1;
1370
1371 af_conf->flags = xa->flags;
1372
1373 /* update the transport address */
1374 if (ldp_addrcmp(af, &af_conf->trans_addr, &xa->trans_addr)) {
1375 af_conf->trans_addr = xa->trans_addr;
1376 update_sockets = 1;
1377 }
1378
1379 /* update ACLs */
1380 if (strcmp(af_conf->acl_label_allocate_for, xa->acl_label_allocate_for))
1381 change_host_label = 1;
1382
1383 if (strcmp(af_conf->acl_label_advertise_to,
1384 xa->acl_label_advertise_to) ||
1385 strcmp(af_conf->acl_label_advertise_for,
1386 xa->acl_label_advertise_for) ||
1387 strcmp(af_conf->acl_label_accept_from,
1388 xa->acl_label_accept_from) ||
1389 strcmp(af_conf->acl_label_accept_for,
1390 xa->acl_label_accept_for))
1391 reset_nbrs = 1;
1392 if (strcmp(af_conf->acl_thello_accept_from, xa->acl_thello_accept_from))
1393 remove_dynamic_tnbrs = 1;
1394 if (strcmp(af_conf->acl_label_expnull_for, xa->acl_label_expnull_for))
1395 change_egress_label = 1;
1396 strlcpy(af_conf->acl_thello_accept_from, xa->acl_thello_accept_from,
1397 sizeof(af_conf->acl_thello_accept_from));
1398 strlcpy(af_conf->acl_label_allocate_for, xa->acl_label_allocate_for,
1399 sizeof(af_conf->acl_label_allocate_for));
1400 strlcpy(af_conf->acl_label_advertise_to, xa->acl_label_advertise_to,
1401 sizeof(af_conf->acl_label_advertise_to));
1402 strlcpy(af_conf->acl_label_advertise_for, xa->acl_label_advertise_for,
1403 sizeof(af_conf->acl_label_advertise_for));
1404 strlcpy(af_conf->acl_label_accept_from, xa->acl_label_accept_from,
1405 sizeof(af_conf->acl_label_accept_from));
1406 strlcpy(af_conf->acl_label_accept_for, xa->acl_label_accept_for,
1407 sizeof(af_conf->acl_label_accept_for));
1408 strlcpy(af_conf->acl_label_expnull_for, xa->acl_label_expnull_for,
1409 sizeof(af_conf->acl_label_expnull_for));
1410
1411 /* apply the new configuration */
1412 switch (ldpd_process) {
1413 case PROC_LDE_ENGINE:
1414 if (change_egress_label)
1415 lde_change_egress_label(af);
1416 if (change_host_label)
1417 lde_change_allocate_filter(af);
1418 if (change_ldp_disabled)
1419 lde_route_update_release_all(af);
1420
1421 break;
1422 case PROC_LDP_ENGINE:
1423 if (stop_init_backoff)
1424 ldpe_stop_init_backoff(af);
1425 if (remove_dynamic_tnbrs)
1426 ldpe_remove_dynamic_tnbrs(af);
1427 if (reset_nbrs)
1428 ldpe_reset_nbrs(AF_UNSPEC);
1429 else if (reset_nbrs_ipv4)
1430 ldpe_reset_nbrs(AF_INET);
1431 break;
1432 case PROC_MAIN:
1433 if (update_sockets && iev_ldpe)
1434 imsg_compose_event(iev_ldpe, IMSG_CLOSE_SOCKETS, af,
1435 0, -1, NULL, 0);
1436 break;
1437 }
1438 }
1439
1440 static void
merge_ifaces(struct ldpd_conf * conf,struct ldpd_conf * xconf)1441 merge_ifaces(struct ldpd_conf *conf, struct ldpd_conf *xconf)
1442 {
1443 struct iface *iface, *itmp, *xi;
1444
1445 RB_FOREACH_SAFE(iface, iface_head, &conf->iface_tree, itmp) {
1446 /* find deleted interfaces, which occurs when LDP is removed
1447 * for all address families
1448 */
1449 if (if_lookup_name(xconf, iface->name) == NULL) {
1450 switch (ldpd_process) {
1451 case PROC_LDP_ENGINE:
1452 ldpe_if_exit(iface);
1453 break;
1454 case PROC_LDE_ENGINE:
1455 if (iface->ipv4.enabled)
1456 lde_route_update_release(iface,
1457 AF_INET);
1458 if (iface->ipv6.enabled)
1459 lde_route_update_release(iface,
1460 AF_INET6);
1461 break;
1462 case PROC_MAIN:
1463 break;
1464 }
1465 RB_REMOVE(iface_head, &conf->iface_tree, iface);
1466 free(iface);
1467 }
1468 }
1469 RB_FOREACH_SAFE(xi, iface_head, &xconf->iface_tree, itmp) {
1470 /* find new interfaces */
1471 if ((iface = if_lookup_name(conf, xi->name)) == NULL) {
1472 COPY(iface, xi);
1473 RB_INSERT(iface_head, &conf->iface_tree, iface);
1474
1475 switch (ldpd_process) {
1476 case PROC_LDP_ENGINE:
1477 ldpe_if_init(iface);
1478 break;
1479 case PROC_LDE_ENGINE:
1480 break;
1481 case PROC_MAIN:
1482 /* resend addresses to activate new interfaces */
1483 kif_redistribute(iface->name);
1484 break;
1485 }
1486 continue;
1487 }
1488
1489 /* update labels when adding or removing ldp on an
1490 * interface
1491 */
1492 if (ldpd_process == PROC_LDE_ENGINE) {
1493 /* if we are removing lpd config for an address
1494 * family on an interface then advertise routes
1495 * learned over this interface as if they were
1496 * connected routes
1497 */
1498 if (iface->ipv4.enabled && !xi->ipv4.enabled)
1499 lde_route_update_release(iface, AF_INET);
1500 if (iface->ipv6.enabled && !xi->ipv6.enabled)
1501 lde_route_update_release(iface, AF_INET6);
1502
1503 /* if we are adding lpd config for an address
1504 * family on an interface then add proper labels
1505 */
1506 if (!iface->ipv4.enabled && xi->ipv4.enabled)
1507 lde_route_update(iface, AF_INET);
1508 if (!iface->ipv6.enabled && xi->ipv6.enabled)
1509 lde_route_update(iface, AF_INET6);
1510 }
1511
1512 /* update existing interfaces */
1513 merge_iface_af(&iface->ipv4, &xi->ipv4);
1514 merge_iface_af(&iface->ipv6, &xi->ipv6);
1515 }
1516 }
1517
1518 static void
merge_iface_af(struct iface_af * ia,struct iface_af * xi)1519 merge_iface_af(struct iface_af *ia, struct iface_af *xi)
1520 {
1521 if (ia->enabled != xi->enabled) {
1522 ia->enabled = xi->enabled;
1523 if (ldpd_process == PROC_LDP_ENGINE)
1524 ldp_if_update(ia->iface, ia->af);
1525 }
1526 ia->hello_holdtime = xi->hello_holdtime;
1527 ia->hello_interval = xi->hello_interval;
1528 }
1529
1530 static void
merge_tnbrs(struct ldpd_conf * conf,struct ldpd_conf * xconf)1531 merge_tnbrs(struct ldpd_conf *conf, struct ldpd_conf *xconf)
1532 {
1533 struct tnbr *tnbr, *ttmp, *xt;
1534
1535 RB_FOREACH_SAFE(tnbr, tnbr_head, &conf->tnbr_tree, ttmp) {
1536 if (!(tnbr->flags & F_TNBR_CONFIGURED))
1537 continue;
1538
1539 /* find deleted tnbrs */
1540 if (tnbr_find(xconf, tnbr->af, &tnbr->addr) == NULL) {
1541 switch (ldpd_process) {
1542 case PROC_LDP_ENGINE:
1543 tnbr->flags &= ~F_TNBR_CONFIGURED;
1544 tnbr_check(conf, tnbr);
1545 break;
1546 case PROC_LDE_ENGINE:
1547 case PROC_MAIN:
1548 RB_REMOVE(tnbr_head, &conf->tnbr_tree, tnbr);
1549 free(tnbr);
1550 break;
1551 }
1552 }
1553 }
1554 RB_FOREACH_SAFE(xt, tnbr_head, &xconf->tnbr_tree, ttmp) {
1555 /* find new tnbrs */
1556 if ((tnbr = tnbr_find(conf, xt->af, &xt->addr)) == NULL) {
1557 COPY(tnbr, xt);
1558 RB_INSERT(tnbr_head, &conf->tnbr_tree, tnbr);
1559
1560 switch (ldpd_process) {
1561 case PROC_LDP_ENGINE:
1562 tnbr_update(tnbr);
1563 break;
1564 case PROC_LDE_ENGINE:
1565 case PROC_MAIN:
1566 break;
1567 }
1568 continue;
1569 }
1570
1571 /* update existing tnbrs */
1572 if (!(tnbr->flags & F_TNBR_CONFIGURED))
1573 tnbr->flags |= F_TNBR_CONFIGURED;
1574 }
1575 }
1576
1577 static void
merge_nbrps(struct ldpd_conf * conf,struct ldpd_conf * xconf)1578 merge_nbrps(struct ldpd_conf *conf, struct ldpd_conf *xconf)
1579 {
1580 struct nbr_params *nbrp, *ntmp, *xn;
1581 struct nbr *nbr;
1582 int nbrp_changed;
1583
1584 RB_FOREACH_SAFE(nbrp, nbrp_head, &conf->nbrp_tree, ntmp) {
1585 /* find deleted nbrps */
1586 if (nbr_params_find(xconf, nbrp->lsr_id) != NULL)
1587 continue;
1588
1589 switch (ldpd_process) {
1590 case PROC_LDP_ENGINE:
1591 nbr = nbr_find_ldpid(nbrp->lsr_id.s_addr);
1592 if (nbr) {
1593 session_shutdown(nbr, S_SHUTDOWN, 0, 0);
1594 #ifdef __OpenBSD__
1595 pfkey_remove(nbr);
1596 #else
1597 sock_set_md5sig(
1598 (ldp_af_global_get(&global, nbr->af))
1599 ->ldp_session_socket,
1600 nbr->af, &nbr->raddr, NULL);
1601 #endif
1602 nbr->auth.method = AUTH_NONE;
1603 if (nbr_session_active_role(nbr))
1604 nbr_establish_connection(nbr);
1605 }
1606 break;
1607 case PROC_LDE_ENGINE:
1608 case PROC_MAIN:
1609 break;
1610 }
1611 RB_REMOVE(nbrp_head, &conf->nbrp_tree, nbrp);
1612 free(nbrp);
1613 }
1614
1615 RB_FOREACH_SAFE(xn, nbrp_head, &xconf->nbrp_tree, ntmp) {
1616 /* find new nbrps */
1617 if ((nbrp = nbr_params_find(conf, xn->lsr_id)) == NULL) {
1618 COPY(nbrp, xn);
1619 RB_INSERT(nbrp_head, &conf->nbrp_tree, nbrp);
1620
1621 switch (ldpd_process) {
1622 case PROC_LDP_ENGINE:
1623 nbr = nbr_find_ldpid(nbrp->lsr_id.s_addr);
1624 if (nbr) {
1625 session_shutdown(nbr, S_SHUTDOWN, 0, 0);
1626 nbr->auth.method = nbrp->auth.method;
1627 #ifdef __OpenBSD__
1628 if (pfkey_establish(nbr, nbrp) == -1)
1629 fatalx("pfkey setup failed");
1630 #else
1631 sock_set_md5sig(
1632 (ldp_af_global_get(&global,
1633 nbr->af))->ldp_session_socket,
1634 nbr->af, &nbr->raddr,
1635 nbrp->auth.md5key);
1636 #endif
1637 if (nbr_session_active_role(nbr))
1638 nbr_establish_connection(nbr);
1639 }
1640 break;
1641 case PROC_LDE_ENGINE:
1642 case PROC_MAIN:
1643 break;
1644 }
1645 continue;
1646 }
1647
1648 /* update existing nbrps */
1649 if (nbrp->flags != xn->flags ||
1650 nbrp->keepalive != xn->keepalive ||
1651 nbrp->gtsm_enabled != xn->gtsm_enabled ||
1652 nbrp->gtsm_hops != xn->gtsm_hops ||
1653 nbrp->auth.method != xn->auth.method ||
1654 strcmp(nbrp->auth.md5key, xn->auth.md5key) != 0)
1655 nbrp_changed = 1;
1656 else
1657 nbrp_changed = 0;
1658
1659 nbrp->keepalive = xn->keepalive;
1660 nbrp->gtsm_enabled = xn->gtsm_enabled;
1661 nbrp->gtsm_hops = xn->gtsm_hops;
1662 nbrp->auth.method = xn->auth.method;
1663 strlcpy(nbrp->auth.md5key, xn->auth.md5key,
1664 sizeof(nbrp->auth.md5key));
1665 nbrp->auth.md5key_len = xn->auth.md5key_len;
1666 nbrp->flags = xn->flags;
1667
1668 if (ldpd_process == PROC_LDP_ENGINE) {
1669 nbr = nbr_find_ldpid(nbrp->lsr_id.s_addr);
1670 if (nbr && nbrp_changed) {
1671 session_shutdown(nbr, S_SHUTDOWN, 0, 0);
1672 #ifdef __OpenBSD__
1673 pfkey_remove(nbr);
1674 nbr->auth.method = nbrp->auth.method;
1675 if (pfkey_establish(nbr, nbrp) == -1)
1676 fatalx("pfkey setup failed");
1677 #else
1678 nbr->auth.method = nbrp->auth.method;
1679 sock_set_md5sig((ldp_af_global_get(&global,
1680 nbr->af))->ldp_session_socket, nbr->af,
1681 &nbr->raddr, nbrp->auth.md5key);
1682 #endif
1683 if (nbr_session_active_role(nbr))
1684 nbr_establish_connection(nbr);
1685 }
1686 }
1687 }
1688 }
1689
1690 static void
merge_l2vpns(struct ldpd_conf * conf,struct ldpd_conf * xconf)1691 merge_l2vpns(struct ldpd_conf *conf, struct ldpd_conf *xconf)
1692 {
1693 struct l2vpn *l2vpn, *ltmp, *xl;
1694
1695 RB_FOREACH_SAFE(l2vpn, l2vpn_head, &conf->l2vpn_tree, ltmp) {
1696 /* find deleted l2vpns */
1697 if (l2vpn_find(xconf, l2vpn->name) == NULL) {
1698 switch (ldpd_process) {
1699 case PROC_LDE_ENGINE:
1700 l2vpn_exit(l2vpn);
1701 break;
1702 case PROC_LDP_ENGINE:
1703 ldpe_l2vpn_exit(l2vpn);
1704 break;
1705 case PROC_MAIN:
1706 break;
1707 }
1708 RB_REMOVE(l2vpn_head, &conf->l2vpn_tree, l2vpn);
1709 l2vpn_del(l2vpn);
1710 }
1711 }
1712 RB_FOREACH_SAFE(xl, l2vpn_head, &xconf->l2vpn_tree, ltmp) {
1713 /* find new l2vpns */
1714 if ((l2vpn = l2vpn_find(conf, xl->name)) == NULL) {
1715 COPY(l2vpn, xl);
1716 RB_INSERT(l2vpn_head, &conf->l2vpn_tree, l2vpn);
1717 RB_INIT(l2vpn_if_head, &l2vpn->if_tree);
1718 RB_INIT(l2vpn_pw_head, &l2vpn->pw_tree);
1719 RB_INIT(l2vpn_pw_head, &l2vpn->pw_inactive_tree);
1720
1721 switch (ldpd_process) {
1722 case PROC_LDE_ENGINE:
1723 l2vpn_init(l2vpn);
1724 break;
1725 case PROC_LDP_ENGINE:
1726 ldpe_l2vpn_init(l2vpn);
1727 break;
1728 case PROC_MAIN:
1729 break;
1730 }
1731 }
1732
1733 /* update existing l2vpns */
1734 merge_l2vpn(conf, l2vpn, xl);
1735 }
1736 }
1737
1738 static void
merge_l2vpn(struct ldpd_conf * xconf,struct l2vpn * l2vpn,struct l2vpn * xl)1739 merge_l2vpn(struct ldpd_conf *xconf, struct l2vpn *l2vpn, struct l2vpn *xl)
1740 {
1741 struct l2vpn_if *lif, *ftmp, *xf;
1742 struct l2vpn_pw *pw, *ptmp, *xp;
1743 struct nbr *nbr;
1744 int reset_nbr, reinstall_pwfec, reinstall_tnbr;
1745 int previous_pw_type, previous_mtu;
1746
1747 previous_pw_type = l2vpn->pw_type;
1748 previous_mtu = l2vpn->mtu;
1749
1750 /* merge intefaces */
1751 RB_FOREACH_SAFE(lif, l2vpn_if_head, &l2vpn->if_tree, ftmp) {
1752 /* find deleted interfaces */
1753 if (l2vpn_if_find(xl, lif->ifname) == NULL) {
1754 RB_REMOVE(l2vpn_if_head, &l2vpn->if_tree, lif);
1755 free(lif);
1756 }
1757 }
1758 RB_FOREACH_SAFE(xf, l2vpn_if_head, &xl->if_tree, ftmp) {
1759 /* find new interfaces */
1760 if (l2vpn_if_find(l2vpn, xf->ifname) == NULL) {
1761 COPY(lif, xf);
1762 RB_INSERT(l2vpn_if_head, &l2vpn->if_tree, lif);
1763 lif->l2vpn = l2vpn;
1764
1765 switch (ldpd_process) {
1766 case PROC_LDP_ENGINE:
1767 case PROC_LDE_ENGINE:
1768 break;
1769 case PROC_MAIN:
1770 kif_redistribute(lif->ifname);
1771 break;
1772 }
1773 }
1774 }
1775
1776 /* merge active pseudowires */
1777 RB_FOREACH_SAFE(pw, l2vpn_pw_head, &l2vpn->pw_tree, ptmp) {
1778 /* find deleted active pseudowires */
1779 if (l2vpn_pw_find_active(xl, pw->ifname) == NULL) {
1780 switch (ldpd_process) {
1781 case PROC_LDE_ENGINE:
1782 l2vpn_pw_exit(pw);
1783 break;
1784 case PROC_LDP_ENGINE:
1785 ldpe_l2vpn_pw_exit(pw);
1786 break;
1787 case PROC_MAIN:
1788 break;
1789 }
1790
1791 RB_REMOVE(l2vpn_pw_head, &l2vpn->pw_tree, pw);
1792 free(pw);
1793 }
1794 }
1795 RB_FOREACH_SAFE(xp, l2vpn_pw_head, &xl->pw_tree, ptmp) {
1796 /* find new active pseudowires */
1797 if ((pw = l2vpn_pw_find_active(l2vpn, xp->ifname)) == NULL) {
1798 COPY(pw, xp);
1799 RB_INSERT(l2vpn_pw_head, &l2vpn->pw_tree, pw);
1800 pw->l2vpn = l2vpn;
1801
1802 switch (ldpd_process) {
1803 case PROC_LDE_ENGINE:
1804 l2vpn_pw_init(pw);
1805 break;
1806 case PROC_LDP_ENGINE:
1807 ldpe_l2vpn_pw_init(pw);
1808 break;
1809 case PROC_MAIN:
1810 kif_redistribute(pw->ifname);
1811 break;
1812 }
1813 continue;
1814 }
1815
1816 /* update existing active pseudowire */
1817 if (pw->af != xp->af ||
1818 ldp_addrcmp(pw->af, &pw->addr, &xp->addr))
1819 reinstall_tnbr = 1;
1820 else
1821 reinstall_tnbr = 0;
1822
1823 /* changes that require a session restart */
1824 if ((pw->flags & (F_PW_STATUSTLV_CONF|F_PW_CWORD_CONF)) !=
1825 (xp->flags & (F_PW_STATUSTLV_CONF|F_PW_CWORD_CONF)))
1826 reset_nbr = 1;
1827 else
1828 reset_nbr = 0;
1829
1830 if (l2vpn->pw_type != xl->pw_type || l2vpn->mtu != xl->mtu ||
1831 pw->pwid != xp->pwid || reinstall_tnbr || reset_nbr ||
1832 pw->lsr_id.s_addr != xp->lsr_id.s_addr)
1833 reinstall_pwfec = 1;
1834 else
1835 reinstall_pwfec = 0;
1836
1837 if (ldpd_process == PROC_LDP_ENGINE) {
1838 if (reinstall_tnbr)
1839 ldpe_l2vpn_pw_exit(pw);
1840 if (reset_nbr) {
1841 nbr = nbr_find_ldpid(pw->lsr_id.s_addr);
1842 if (nbr && nbr->state == NBR_STA_OPER)
1843 session_shutdown(nbr, S_SHUTDOWN, 0, 0);
1844 }
1845 }
1846 if (ldpd_process == PROC_LDE_ENGINE && reinstall_pwfec)
1847 l2vpn_pw_exit(pw);
1848 pw->lsr_id = xp->lsr_id;
1849 pw->af = xp->af;
1850 pw->addr = xp->addr;
1851 pw->pwid = xp->pwid;
1852 strlcpy(pw->ifname, xp->ifname, sizeof(pw->ifname));
1853 pw->ifindex = xp->ifindex;
1854 if (xp->flags & F_PW_CWORD_CONF)
1855 pw->flags |= F_PW_CWORD_CONF;
1856 else
1857 pw->flags &= ~F_PW_CWORD_CONF;
1858 if (xp->flags & F_PW_STATUSTLV_CONF)
1859 pw->flags |= F_PW_STATUSTLV_CONF;
1860 else
1861 pw->flags &= ~F_PW_STATUSTLV_CONF;
1862 if (xp->flags & F_PW_STATIC_NBR_ADDR)
1863 pw->flags |= F_PW_STATIC_NBR_ADDR;
1864 else
1865 pw->flags &= ~F_PW_STATIC_NBR_ADDR;
1866 if (ldpd_process == PROC_LDP_ENGINE && reinstall_tnbr)
1867 ldpe_l2vpn_pw_init(pw);
1868 if (ldpd_process == PROC_LDE_ENGINE && reinstall_pwfec) {
1869 l2vpn->pw_type = xl->pw_type;
1870 l2vpn->mtu = xl->mtu;
1871 l2vpn_pw_init(pw);
1872 l2vpn->pw_type = previous_pw_type;
1873 l2vpn->mtu = previous_mtu;
1874 }
1875 }
1876
1877 /* merge inactive pseudowires */
1878 RB_FOREACH_SAFE(pw, l2vpn_pw_head, &l2vpn->pw_inactive_tree, ptmp) {
1879 /* find deleted inactive pseudowires */
1880 if (l2vpn_pw_find_inactive(xl, pw->ifname) == NULL) {
1881 RB_REMOVE(l2vpn_pw_head, &l2vpn->pw_inactive_tree, pw);
1882 free(pw);
1883 }
1884 }
1885 RB_FOREACH_SAFE(xp, l2vpn_pw_head, &xl->pw_inactive_tree, ptmp) {
1886 /* find new inactive pseudowires */
1887 if ((pw = l2vpn_pw_find_inactive(l2vpn, xp->ifname)) == NULL) {
1888 COPY(pw, xp);
1889 RB_INSERT(l2vpn_pw_head, &l2vpn->pw_inactive_tree, pw);
1890 pw->l2vpn = l2vpn;
1891
1892 switch (ldpd_process) {
1893 case PROC_LDE_ENGINE:
1894 case PROC_LDP_ENGINE:
1895 break;
1896 case PROC_MAIN:
1897 kif_redistribute(pw->ifname);
1898 break;
1899 }
1900 continue;
1901 }
1902
1903 /* update existing inactive pseudowire */
1904 pw->lsr_id.s_addr = xp->lsr_id.s_addr;
1905 pw->af = xp->af;
1906 pw->addr = xp->addr;
1907 pw->pwid = xp->pwid;
1908 strlcpy(pw->ifname, xp->ifname, sizeof(pw->ifname));
1909 pw->ifindex = xp->ifindex;
1910 pw->flags = xp->flags;
1911 }
1912
1913 l2vpn->pw_type = xl->pw_type;
1914 l2vpn->mtu = xl->mtu;
1915 strlcpy(l2vpn->br_ifname, xl->br_ifname, sizeof(l2vpn->br_ifname));
1916 l2vpn->br_ifindex = xl->br_ifindex;
1917 }
1918
1919 struct ldpd_conf *
config_new_empty(void)1920 config_new_empty(void)
1921 {
1922 struct ldpd_conf *xconf;
1923
1924 xconf = calloc(1, sizeof(*xconf));
1925 if (xconf == NULL)
1926 fatal(NULL);
1927
1928 RB_INIT(iface_head, &xconf->iface_tree);
1929 RB_INIT(tnbr_head, &xconf->tnbr_tree);
1930 RB_INIT(nbrp_head, &xconf->nbrp_tree);
1931 RB_INIT(l2vpn_head, &xconf->l2vpn_tree);
1932
1933 /* set default values */
1934 ldp_config_reset(xconf);
1935
1936 return (xconf);
1937 }
1938
1939 void
config_clear(struct ldpd_conf * conf)1940 config_clear(struct ldpd_conf *conf)
1941 {
1942 struct ldpd_conf *xconf;
1943
1944 /*
1945 * Merge current config with an empty config, this will deactivate
1946 * and deallocate all the interfaces, pseudowires and so on. Before
1947 * merging, copy the router-id and other variables to avoid some
1948 * unnecessary operations, like trying to reset the neighborships.
1949 */
1950 xconf = config_new_empty();
1951 xconf->ipv4 = conf->ipv4;
1952 xconf->ipv6 = conf->ipv6;
1953 xconf->rtr_id = conf->rtr_id;
1954 xconf->trans_pref = conf->trans_pref;
1955 xconf->flags = conf->flags;
1956 merge_config(conf, xconf);
1957 free(xconf);
1958 free(conf);
1959 }
1960