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Zebra: Data structures for RMAC processing in FPM
[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 #include "lib_errors.h"
46
47 static void ldpd_shutdown(void);
48 static pid_t start_child(enum ldpd_process, char *, int, int);
49 static int main_dispatch_ldpe(struct thread *);
50 static int main_dispatch_lde(struct thread *);
51 static int main_imsg_send_ipc_sockets(struct imsgbuf *,
52 struct imsgbuf *);
53 static void main_imsg_send_net_sockets(int);
54 static void main_imsg_send_net_socket(int, enum socket_type);
55 static int main_imsg_send_config(struct ldpd_conf *);
56 static void ldp_config_normalize(struct ldpd_conf *);
57 static void ldp_config_reset(struct ldpd_conf *);
58 static void ldp_config_reset_main(struct ldpd_conf *);
59 static void ldp_config_reset_af(struct ldpd_conf *, int);
60 static void ldp_config_reset_l2vpns(struct ldpd_conf *);
61 static void merge_global(struct ldpd_conf *, struct ldpd_conf *);
62 static void merge_af(int, struct ldpd_af_conf *,
63 struct ldpd_af_conf *);
64 static void merge_ifaces(struct ldpd_conf *, struct ldpd_conf *);
65 static void merge_iface_af(struct iface_af *, struct iface_af *);
66 static void merge_tnbrs(struct ldpd_conf *, struct ldpd_conf *);
67 static void merge_nbrps(struct ldpd_conf *, struct ldpd_conf *);
68 static void merge_l2vpns(struct ldpd_conf *, struct ldpd_conf *);
69 static void merge_l2vpn(struct ldpd_conf *, struct l2vpn *,
70 struct l2vpn *);
71
72 DEFINE_QOBJ_TYPE(iface)
73 DEFINE_QOBJ_TYPE(tnbr)
74 DEFINE_QOBJ_TYPE(nbr_params)
75 DEFINE_QOBJ_TYPE(l2vpn_if)
76 DEFINE_QOBJ_TYPE(l2vpn_pw)
77 DEFINE_QOBJ_TYPE(l2vpn)
78 DEFINE_QOBJ_TYPE(ldpd_conf)
79
80 struct ldpd_global global;
81 struct ldpd_init init;
82 struct ldpd_conf *ldpd_conf, *vty_conf;
83
84 static struct imsgev *iev_ldpe, *iev_ldpe_sync;
85 static struct imsgev *iev_lde, *iev_lde_sync;
86 static pid_t ldpe_pid;
87 static pid_t lde_pid;
88
89 #define LDP_DEFAULT_CONFIG "ldpd.conf"
90 #define LDP_VTY_PORT 2612
91
92 /* Master of threads. */
93 struct thread_master *master;
94
95 static struct frr_daemon_info ldpd_di;
96
97 /* ldpd privileges */
98 static zebra_capabilities_t _caps_p [] =
99 {
100 ZCAP_BIND,
101 ZCAP_NET_ADMIN
102 };
103
104 struct zebra_privs_t ldpd_privs =
105 {
106 #if defined(FRR_USER) && defined(FRR_GROUP)
107 .user = FRR_USER,
108 .group = FRR_GROUP,
109 #endif
110 #if defined(VTY_GROUP)
111 .vty_group = VTY_GROUP,
112 #endif
113 .caps_p = _caps_p,
114 .cap_num_p = array_size(_caps_p),
115 .cap_num_i = 0
116 };
117
118 /* CTL Socket path */
119 char ctl_sock_path[MAXPATHLEN];
120
121 /* LDPd options. */
122 #define OPTION_CTLSOCK 1001
123 static struct option longopts[] =
124 {
125 { "ctl_socket", required_argument, NULL, OPTION_CTLSOCK},
126 { "instance", required_argument, NULL, 'n'},
127 { 0 }
128 };
129
130 /* SIGHUP handler. */
131 static void
132 sighup(void)
133 {
134 log_info("SIGHUP received");
135
136 /*
137 * Do a full configuration reload. In other words, reset vty_conf
138 * and build a new configuartion from scratch.
139 */
140 ldp_config_reset(vty_conf);
141 vty_read_config(NULL, ldpd_di.config_file, config_default);
142 ldp_config_apply(NULL, vty_conf);
143 }
144
145 /* SIGINT / SIGTERM handler. */
146 static void
147 sigint(void)
148 {
149 log_info("SIGINT received");
150 ldpd_shutdown();
151 }
152
153 /* SIGUSR1 handler. */
154 static void
155 sigusr1(void)
156 {
157 zlog_rotate();
158 }
159
160 static struct quagga_signal_t ldp_signals[] =
161 {
162 {
163 .signal = SIGHUP,
164 .handler = &sighup,
165 },
166 {
167 .signal = SIGINT,
168 .handler = &sigint,
169 },
170 {
171 .signal = SIGTERM,
172 .handler = &sigint,
173 },
174 {
175 .signal = SIGUSR1,
176 .handler = &sigusr1,
177 }
178 };
179
180 static const struct frr_yang_module_info *ldpd_yang_modules[] = {
181 };
182
183 FRR_DAEMON_INFO(ldpd, LDP,
184 .vty_port = LDP_VTY_PORT,
185
186 .proghelp = "Implementation of the LDP protocol.",
187
188 .signals = ldp_signals,
189 .n_signals = array_size(ldp_signals),
190
191 .privs = &ldpd_privs,
192
193 .yang_modules = ldpd_yang_modules,
194 .n_yang_modules = array_size(ldpd_yang_modules),
195 )
196
197 static int ldp_config_fork_apply(struct thread *t)
198 {
199 /*
200 * So the frr_config_fork() function schedules
201 * the read of the vty config( if there is a
202 * non-integrated config ) to be after the
203 * end of startup and we are starting the
204 * main process loop. We need to schedule
205 * the application of this if necessary
206 * after the read in of the config.
207 */
208 ldp_config_apply(NULL, vty_conf);
209
210 return 0;
211 }
212
213 int
214 main(int argc, char *argv[])
215 {
216 char *saved_argv0;
217 int lflag = 0, eflag = 0;
218 int pipe_parent2ldpe[2], pipe_parent2ldpe_sync[2];
219 int pipe_parent2lde[2], pipe_parent2lde_sync[2];
220 char *ctl_sock_name;
221 struct thread *thread = NULL;
222 bool ctl_sock_used = false;
223
224 snprintf(ctl_sock_path, sizeof(ctl_sock_path), LDPD_SOCKET,
225 "", "");
226
227 ldpd_process = PROC_MAIN;
228 log_procname = log_procnames[ldpd_process];
229
230 saved_argv0 = argv[0];
231 if (saved_argv0 == NULL)
232 saved_argv0 = (char *)"ldpd";
233
234 frr_preinit(&ldpd_di, argc, argv);
235 frr_opt_add("LEn:", longopts,
236 " --ctl_socket Override ctl socket path\n"
237 " -n, --instance Instance id\n");
238
239 while (1) {
240 int opt;
241
242 opt = frr_getopt(argc, argv, NULL);
243
244 if (opt == EOF)
245 break;
246
247 switch (opt) {
248 case 0:
249 break;
250 case OPTION_CTLSOCK:
251 ctl_sock_used = true;
252 ctl_sock_name = strrchr(LDPD_SOCKET, '/');
253 if (ctl_sock_name)
254 /* skip '/' */
255 ctl_sock_name++;
256 else
257 /*
258 * LDPD_SOCKET configured as relative path
259 * during config? Should really never happen for
260 * sensible config
261 */
262 ctl_sock_name = (char *)LDPD_SOCKET;
263 strlcpy(ctl_sock_path, optarg, sizeof(ctl_sock_path));
264 strlcat(ctl_sock_path, "/", sizeof(ctl_sock_path));
265 strlcat(ctl_sock_path, ctl_sock_name,
266 sizeof(ctl_sock_path));
267 break;
268 case 'n':
269 init.instance = atoi(optarg);
270 if (init.instance < 1)
271 exit(0);
272 break;
273 case 'L':
274 lflag = 1;
275 break;
276 case 'E':
277 eflag = 1;
278 break;
279 default:
280 frr_help_exit(1);
281 break;
282 }
283 }
284
285 if (ldpd_di.pathspace && !ctl_sock_used)
286 snprintf(ctl_sock_path, sizeof(ctl_sock_path), LDPD_SOCKET,
287 "/", ldpd_di.pathspace);
288
289 strlcpy(init.user, ldpd_privs.user, sizeof(init.user));
290 strlcpy(init.group, ldpd_privs.group, sizeof(init.group));
291 strlcpy(init.ctl_sock_path, ctl_sock_path, sizeof(init.ctl_sock_path));
292 strlcpy(init.zclient_serv_path, frr_zclientpath,
293 sizeof(init.zclient_serv_path));
294
295 argc -= optind;
296 if (argc > 0 || (lflag && eflag))
297 frr_help_exit(1);
298
299 /* check for root privileges */
300 if (geteuid() != 0) {
301 errno = EPERM;
302 perror(ldpd_di.progname);
303 exit(1);
304 }
305
306 if (lflag || eflag)
307 openzlog(ldpd_di.progname, "LDP", 0,
308 LOG_CONS | LOG_NDELAY | LOG_PID, LOG_DAEMON);
309 if (lflag)
310 lde();
311 else if (eflag)
312 ldpe();
313
314 if (socketpair(AF_UNIX, SOCK_STREAM, PF_UNSPEC, pipe_parent2ldpe) == -1)
315 fatal("socketpair");
316 if (socketpair(AF_UNIX, SOCK_STREAM, PF_UNSPEC,
317 pipe_parent2ldpe_sync) == -1)
318 fatal("socketpair");
319 if (socketpair(AF_UNIX, SOCK_STREAM, PF_UNSPEC, pipe_parent2lde) == -1)
320 fatal("socketpair");
321 if (socketpair(AF_UNIX, SOCK_STREAM, PF_UNSPEC,
322 pipe_parent2lde_sync) == -1)
323 fatal("socketpair");
324 sock_set_nonblock(pipe_parent2ldpe[0]);
325 sock_set_cloexec(pipe_parent2ldpe[0]);
326 sock_set_nonblock(pipe_parent2ldpe[1]);
327 sock_set_cloexec(pipe_parent2ldpe[1]);
328 sock_set_nonblock(pipe_parent2ldpe_sync[0]);
329 sock_set_cloexec(pipe_parent2ldpe_sync[0]);
330 sock_set_cloexec(pipe_parent2ldpe_sync[1]);
331 sock_set_nonblock(pipe_parent2lde[0]);
332 sock_set_cloexec(pipe_parent2lde[0]);
333 sock_set_nonblock(pipe_parent2lde[1]);
334 sock_set_cloexec(pipe_parent2lde[1]);
335 sock_set_nonblock(pipe_parent2lde_sync[0]);
336 sock_set_cloexec(pipe_parent2lde_sync[0]);
337 sock_set_cloexec(pipe_parent2lde_sync[1]);
338
339 /* start children */
340 lde_pid = start_child(PROC_LDE_ENGINE, saved_argv0,
341 pipe_parent2lde[1], pipe_parent2lde_sync[1]);
342 ldpe_pid = start_child(PROC_LDP_ENGINE, saved_argv0,
343 pipe_parent2ldpe[1], pipe_parent2ldpe_sync[1]);
344
345 master = frr_init();
346
347 vrf_init(NULL, NULL, NULL, NULL, NULL);
348 access_list_init();
349 ldp_vty_init();
350 ldp_zebra_init(master);
351
352 /*
353 * Create base configuration with sane defaults. All configuration
354 * requests (e.g. CLI) act on vty_conf and then call ldp_config_apply()
355 * to merge the changes into ldpd_conf, which contains the actual
356 * running configuration.
357 */
358 ldpd_conf = config_new_empty();
359 vty_conf = config_new_empty();
360 QOBJ_REG(vty_conf, ldpd_conf);
361
362 /* read configuration file and daemonize */
363 frr_config_fork();
364
365 /* apply configuration */
366 thread_add_event(master, ldp_config_fork_apply, NULL, 0, &thread);
367
368 /* setup pipes to children */
369 if ((iev_ldpe = calloc(1, sizeof(struct imsgev))) == NULL ||
370 (iev_ldpe_sync = calloc(1, sizeof(struct imsgev))) == NULL ||
371 (iev_lde = calloc(1, sizeof(struct imsgev))) == NULL ||
372 (iev_lde_sync = calloc(1, sizeof(struct imsgev))) == NULL)
373 fatal(NULL);
374 imsg_init(&iev_ldpe->ibuf, pipe_parent2ldpe[0]);
375 iev_ldpe->handler_read = main_dispatch_ldpe;
376 iev_ldpe->ev_read = NULL;
377 thread_add_read(master, iev_ldpe->handler_read, iev_ldpe, iev_ldpe->ibuf.fd,
378 &iev_ldpe->ev_read);
379 iev_ldpe->handler_write = ldp_write_handler;
380
381 imsg_init(&iev_ldpe_sync->ibuf, pipe_parent2ldpe_sync[0]);
382 iev_ldpe_sync->handler_read = main_dispatch_ldpe;
383 iev_ldpe_sync->ev_read = NULL;
384 thread_add_read(master, iev_ldpe_sync->handler_read, iev_ldpe_sync, iev_ldpe_sync->ibuf.fd,
385 &iev_ldpe_sync->ev_read);
386 iev_ldpe_sync->handler_write = ldp_write_handler;
387
388 imsg_init(&iev_lde->ibuf, pipe_parent2lde[0]);
389 iev_lde->handler_read = main_dispatch_lde;
390 iev_lde->ev_read = NULL;
391 thread_add_read(master, iev_lde->handler_read, iev_lde, iev_lde->ibuf.fd,
392 &iev_lde->ev_read);
393 iev_lde->handler_write = ldp_write_handler;
394
395 imsg_init(&iev_lde_sync->ibuf, pipe_parent2lde_sync[0]);
396 iev_lde_sync->handler_read = main_dispatch_lde;
397 iev_lde_sync->ev_read = NULL;
398 thread_add_read(master, iev_lde_sync->handler_read, iev_lde_sync, iev_lde_sync->ibuf.fd,
399 &iev_lde_sync->ev_read);
400 iev_lde_sync->handler_write = ldp_write_handler;
401
402 if (main_imsg_send_ipc_sockets(&iev_ldpe->ibuf, &iev_lde->ibuf))
403 fatal("could not establish imsg links");
404 main_imsg_compose_both(IMSG_DEBUG_UPDATE, &ldp_debug,
405 sizeof(ldp_debug));
406 main_imsg_compose_both(IMSG_INIT, &init, sizeof(init));
407 main_imsg_send_config(ldpd_conf);
408
409 if (ldpd_conf->ipv4.flags & F_LDPD_AF_ENABLED)
410 main_imsg_send_net_sockets(AF_INET);
411 if (ldpd_conf->ipv6.flags & F_LDPD_AF_ENABLED)
412 main_imsg_send_net_sockets(AF_INET6);
413
414 frr_run(master);
415
416 /* NOTREACHED */
417 return (0);
418 }
419
420 static void
421 ldpd_shutdown(void)
422 {
423 pid_t pid;
424 int status;
425
426 frr_early_fini();
427
428 /* close pipes */
429 msgbuf_clear(&iev_ldpe->ibuf.w);
430 close(iev_ldpe->ibuf.fd);
431 msgbuf_clear(&iev_lde->ibuf.w);
432 close(iev_lde->ibuf.fd);
433
434 config_clear(ldpd_conf);
435
436 ldp_config_reset(vty_conf);
437 QOBJ_UNREG(vty_conf);
438 free(vty_conf);
439
440 log_debug("waiting for children to terminate");
441
442 while (true) {
443 /* Wait for child process. */
444 pid = wait(&status);
445 if (pid == -1) {
446 /* We got interrupted, try again. */
447 if (errno == EINTR)
448 continue;
449 /* No more processes were found. */
450 if (errno == ECHILD)
451 break;
452
453 /* Unhandled errno condition. */
454 fatal("wait");
455 /* UNREACHABLE */
456 }
457
458 /* We found something, lets announce it. */
459 if (WIFSIGNALED(status))
460 log_warnx("%s terminated; signal %d",
461 (pid == lde_pid ? "label decision engine"
462 : "ldp engine"),
463 WTERMSIG(status));
464
465 /* Repeat until there are no more child processes. */
466 }
467
468 free(iev_ldpe);
469 free(iev_lde);
470
471 log_info("terminating");
472
473 vrf_terminate();
474 access_list_reset();
475 ldp_zebra_destroy();
476
477 frr_fini();
478 exit(0);
479 }
480
481 static pid_t
482 start_child(enum ldpd_process p, char *argv0, int fd_async, int fd_sync)
483 {
484 char *argv[3];
485 int argc = 0, nullfd;
486 pid_t pid;
487
488 switch (pid = fork()) {
489 case -1:
490 fatal("cannot fork");
491 case 0:
492 break;
493 default:
494 close(fd_async);
495 close(fd_sync);
496 return (pid);
497 }
498
499 nullfd = open("/dev/null", O_RDONLY | O_NOCTTY);
500 if (nullfd == -1) {
501 flog_err_sys(EC_LIB_SYSTEM_CALL,
502 "%s: failed to open /dev/null: %s", __func__,
503 safe_strerror(errno));
504 } else {
505 dup2(nullfd, 0);
506 dup2(nullfd, 1);
507 dup2(nullfd, 2);
508 close(nullfd);
509 }
510
511 if (dup2(fd_async, LDPD_FD_ASYNC) == -1)
512 fatal("cannot setup imsg async fd");
513 if (dup2(fd_sync, LDPD_FD_SYNC) == -1)
514 fatal("cannot setup imsg sync fd");
515
516 argv[argc++] = argv0;
517 switch (p) {
518 case PROC_MAIN:
519 fatalx("Can not start main process");
520 case PROC_LDE_ENGINE:
521 argv[argc++] = (char *)"-L";
522 break;
523 case PROC_LDP_ENGINE:
524 argv[argc++] = (char *)"-E";
525 break;
526 }
527 argv[argc++] = NULL;
528
529 execvp(argv0, argv);
530 fatal("execvp");
531 }
532
533 /* imsg handling */
534 /* ARGSUSED */
535 static int
536 main_dispatch_ldpe(struct thread *thread)
537 {
538 struct imsgev *iev = THREAD_ARG(thread);
539 struct imsgbuf *ibuf = &iev->ibuf;
540 struct imsg imsg;
541 int af;
542 ssize_t n;
543 int shut = 0;
544
545 iev->ev_read = NULL;
546
547 if ((n = imsg_read(ibuf)) == -1 && errno != EAGAIN)
548 fatal("imsg_read error");
549 if (n == 0) /* connection closed */
550 shut = 1;
551
552 for (;;) {
553 if ((n = imsg_get(ibuf, &imsg)) == -1)
554 fatal("imsg_get");
555
556 if (n == 0)
557 break;
558
559 switch (imsg.hdr.type) {
560 case IMSG_LOG:
561 logit(imsg.hdr.pid, "%s", (const char *)imsg.data);
562 break;
563 case IMSG_REQUEST_SOCKETS:
564 af = imsg.hdr.pid;
565 main_imsg_send_net_sockets(af);
566 break;
567 case IMSG_ACL_CHECK:
568 if (imsg.hdr.len != IMSG_HEADER_SIZE +
569 sizeof(struct acl_check))
570 fatalx("IMSG_ACL_CHECK imsg with wrong len");
571 ldp_acl_reply(iev, (struct acl_check *)imsg.data);
572 break;
573 default:
574 log_debug("%s: error handling imsg %d", __func__,
575 imsg.hdr.type);
576 break;
577 }
578 imsg_free(&imsg);
579 }
580 if (!shut)
581 imsg_event_add(iev);
582 else {
583 /* this pipe is dead, so remove the event handlers and exit */
584 THREAD_READ_OFF(iev->ev_read);
585 THREAD_WRITE_OFF(iev->ev_write);
586 ldpe_pid = 0;
587 if (lde_pid == 0)
588 ldpd_shutdown();
589 else
590 kill(lde_pid, SIGTERM);
591 }
592
593 return (0);
594 }
595
596 /* ARGSUSED */
597 static int
598 main_dispatch_lde(struct thread *thread)
599 {
600 struct imsgev *iev = THREAD_ARG(thread);
601 struct imsgbuf *ibuf = &iev->ibuf;
602 struct imsg imsg;
603 ssize_t n;
604 int shut = 0;
605
606 iev->ev_read = NULL;
607
608 if ((n = imsg_read(ibuf)) == -1 && errno != EAGAIN)
609 fatal("imsg_read error");
610 if (n == 0) /* connection closed */
611 shut = 1;
612
613 for (;;) {
614 if ((n = imsg_get(ibuf, &imsg)) == -1)
615 fatal("imsg_get");
616
617 if (n == 0)
618 break;
619
620 switch (imsg.hdr.type) {
621 case IMSG_LOG:
622 logit(imsg.hdr.pid, "%s", (const char *)imsg.data);
623 break;
624 case IMSG_KLABEL_CHANGE:
625 if (imsg.hdr.len - IMSG_HEADER_SIZE !=
626 sizeof(struct kroute))
627 fatalx("invalid size of IMSG_KLABEL_CHANGE");
628 if (kr_change(imsg.data))
629 log_warnx("%s: error changing route", __func__);
630 break;
631 case IMSG_KLABEL_DELETE:
632 if (imsg.hdr.len - IMSG_HEADER_SIZE !=
633 sizeof(struct kroute))
634 fatalx("invalid size of IMSG_KLABEL_DELETE");
635 if (kr_delete(imsg.data))
636 log_warnx("%s: error deleting route", __func__);
637 break;
638 case IMSG_KPW_ADD:
639 case IMSG_KPW_DELETE:
640 case IMSG_KPW_SET:
641 case IMSG_KPW_UNSET:
642 if (imsg.hdr.len - IMSG_HEADER_SIZE !=
643 sizeof(struct zapi_pw))
644 fatalx("invalid size of IMSG_KPWLABEL_CHANGE");
645
646 switch (imsg.hdr.type) {
647 case IMSG_KPW_ADD:
648 if (kmpw_add(imsg.data))
649 log_warnx("%s: error adding "
650 "pseudowire", __func__);
651 break;
652 case IMSG_KPW_DELETE:
653 if (kmpw_del(imsg.data))
654 log_warnx("%s: error deleting "
655 "pseudowire", __func__);
656 break;
657 case IMSG_KPW_SET:
658 if (kmpw_set(imsg.data))
659 log_warnx("%s: error setting "
660 "pseudowire", __func__);
661 break;
662 case IMSG_KPW_UNSET:
663 if (kmpw_unset(imsg.data))
664 log_warnx("%s: error unsetting "
665 "pseudowire", __func__);
666 break;
667 }
668 break;
669 case IMSG_ACL_CHECK:
670 if (imsg.hdr.len != IMSG_HEADER_SIZE +
671 sizeof(struct acl_check))
672 fatalx("IMSG_ACL_CHECK imsg with wrong len");
673 ldp_acl_reply(iev, (struct acl_check *)imsg.data);
674 break;
675 default:
676 log_debug("%s: error handling imsg %d", __func__,
677 imsg.hdr.type);
678 break;
679 }
680 imsg_free(&imsg);
681 }
682 if (!shut)
683 imsg_event_add(iev);
684 else {
685 /* this pipe is dead, so remove the event handlers and exit */
686 THREAD_READ_OFF(iev->ev_read);
687 THREAD_WRITE_OFF(iev->ev_write);
688 lde_pid = 0;
689 if (ldpe_pid == 0)
690 ldpd_shutdown();
691 else
692 kill(ldpe_pid, SIGTERM);
693 }
694
695 return (0);
696 }
697
698 /* ARGSUSED */
699 int
700 ldp_write_handler(struct thread *thread)
701 {
702 struct imsgev *iev = THREAD_ARG(thread);
703 struct imsgbuf *ibuf = &iev->ibuf;
704 ssize_t n;
705
706 iev->ev_write = NULL;
707
708 if ((n = msgbuf_write(&ibuf->w)) == -1 && errno != EAGAIN)
709 fatal("msgbuf_write");
710 if (n == 0) {
711 /* this pipe is dead, so remove the event handlers */
712 THREAD_READ_OFF(iev->ev_read);
713 THREAD_WRITE_OFF(iev->ev_write);
714 return (0);
715 }
716
717 imsg_event_add(iev);
718
719 return (0);
720 }
721
722 void
723 main_imsg_compose_ldpe(int type, pid_t pid, void *data, uint16_t datalen)
724 {
725 if (iev_ldpe == NULL)
726 return;
727 imsg_compose_event(iev_ldpe, type, 0, pid, -1, data, datalen);
728 }
729
730 void
731 main_imsg_compose_lde(int type, pid_t pid, void *data, uint16_t datalen)
732 {
733 imsg_compose_event(iev_lde, type, 0, pid, -1, data, datalen);
734 }
735
736 int
737 main_imsg_compose_both(enum imsg_type type, void *buf, uint16_t len)
738 {
739 if (iev_ldpe == NULL || iev_lde == NULL)
740 return (0);
741 if (imsg_compose_event(iev_ldpe, type, 0, 0, -1, buf, len) == -1)
742 return (-1);
743 if (imsg_compose_event(iev_lde, type, 0, 0, -1, buf, len) == -1)
744 return (-1);
745 return (0);
746 }
747
748 void
749 imsg_event_add(struct imsgev *iev)
750 {
751 if (iev->handler_read)
752 thread_add_read(master, iev->handler_read, iev, iev->ibuf.fd,
753 &iev->ev_read);
754
755 if (iev->handler_write && iev->ibuf.w.queued)
756 thread_add_write(master, iev->handler_write, iev,
757 iev->ibuf.fd, &iev->ev_write);
758 }
759
760 int
761 imsg_compose_event(struct imsgev *iev, uint16_t type, uint32_t peerid,
762 pid_t pid, int fd, void *data, uint16_t datalen)
763 {
764 int ret;
765
766 if ((ret = imsg_compose(&iev->ibuf, type, peerid,
767 pid, fd, data, datalen)) != -1)
768 imsg_event_add(iev);
769 return (ret);
770 }
771
772 void
773 evbuf_enqueue(struct evbuf *eb, struct ibuf *buf)
774 {
775 ibuf_close(&eb->wbuf, buf);
776 evbuf_event_add(eb);
777 }
778
779 void
780 evbuf_event_add(struct evbuf *eb)
781 {
782 if (eb->wbuf.queued)
783 thread_add_write(master, eb->handler, eb->arg, eb->wbuf.fd,
784 &eb->ev);
785 }
786
787 void
788 evbuf_init(struct evbuf *eb, int fd, int (*handler)(struct thread *),
789 void *arg)
790 {
791 msgbuf_init(&eb->wbuf);
792 eb->wbuf.fd = fd;
793 eb->handler = handler;
794 eb->arg = arg;
795 }
796
797 void
798 evbuf_clear(struct evbuf *eb)
799 {
800 THREAD_WRITE_OFF(eb->ev);
801 msgbuf_clear(&eb->wbuf);
802 eb->wbuf.fd = -1;
803 }
804
805 static int
806 main_imsg_send_ipc_sockets(struct imsgbuf *ldpe_buf, struct imsgbuf *lde_buf)
807 {
808 int pipe_ldpe2lde[2];
809
810 if (socketpair(AF_UNIX, SOCK_STREAM, PF_UNSPEC, pipe_ldpe2lde) == -1)
811 return (-1);
812 sock_set_nonblock(pipe_ldpe2lde[0]);
813 sock_set_nonblock(pipe_ldpe2lde[1]);
814
815 if (imsg_compose(ldpe_buf, IMSG_SOCKET_IPC, 0, 0, pipe_ldpe2lde[0],
816 NULL, 0) == -1)
817 return (-1);
818 if (imsg_compose(lde_buf, IMSG_SOCKET_IPC, 0, 0, pipe_ldpe2lde[1],
819 NULL, 0) == -1)
820 return (-1);
821
822 return (0);
823 }
824
825 static void
826 main_imsg_send_net_sockets(int af)
827 {
828 if (!ldp_addrisset(af, &(ldp_af_conf_get(ldpd_conf, af))->trans_addr))
829 return;
830
831 main_imsg_send_net_socket(af, LDP_SOCKET_DISC);
832 main_imsg_send_net_socket(af, LDP_SOCKET_EDISC);
833 main_imsg_send_net_socket(af, LDP_SOCKET_SESSION);
834 imsg_compose_event(iev_ldpe, IMSG_SETUP_SOCKETS, af, 0, -1, NULL, 0);
835 }
836
837 static void
838 main_imsg_send_net_socket(int af, enum socket_type type)
839 {
840 int fd;
841
842 fd = ldp_create_socket(af, type);
843 if (fd == -1) {
844 log_warnx("%s: failed to create %s socket for address-family "
845 "%s", __func__, socket_name(type), af_name(af));
846 return;
847 }
848
849 imsg_compose_event(iev_ldpe, IMSG_SOCKET_NET, af, 0, fd, &type,
850 sizeof(type));
851 }
852
853 int
854 ldp_acl_request(struct imsgev *iev, char *acl_name, int af,
855 union ldpd_addr *addr, uint8_t prefixlen)
856 {
857 struct imsg imsg;
858 ssize_t n;
859 struct acl_check acl_check;
860
861 if (acl_name[0] == '\0')
862 return FILTER_PERMIT;
863
864 /* build request */
865 strlcpy(acl_check.acl, acl_name, sizeof(acl_check.acl));
866 acl_check.af = af;
867 acl_check.addr = *addr;
868 acl_check.prefixlen = prefixlen;
869
870 /* send (blocking) */
871 imsg_compose_event(iev, IMSG_ACL_CHECK, 0, 0, -1, &acl_check,
872 sizeof(acl_check));
873 imsg_flush(&iev->ibuf);
874
875 /* receive (blocking) and parse result */
876 if ((n = imsg_read(&iev->ibuf)) == -1)
877 fatal("imsg_read error");
878 if ((n = imsg_get(&iev->ibuf, &imsg)) == -1)
879 fatal("imsg_get");
880 if (imsg.hdr.type != IMSG_ACL_CHECK ||
881 imsg.hdr.len != IMSG_HEADER_SIZE + sizeof(int))
882 fatalx("ldp_acl_request: invalid response");
883
884 return (*((int *)imsg.data));
885 }
886
887 void
888 ldp_acl_reply(struct imsgev *iev, struct acl_check *acl_check)
889 {
890 struct access_list *alist;
891 struct prefix prefix;
892 int result;
893
894 alist = access_list_lookup(family2afi(acl_check->af), acl_check->acl);
895 if (alist == NULL)
896 result = FILTER_DENY;
897 else {
898 prefix.family = acl_check->af;
899 switch (prefix.family) {
900 case AF_INET:
901 prefix.u.prefix4 = acl_check->addr.v4;
902 break;
903 case AF_INET6:
904 prefix.u.prefix6 = acl_check->addr.v6;
905 break;
906 default:
907 fatalx("ldp_acl_reply: unknown af");
908 }
909 prefix.prefixlen = acl_check->prefixlen;
910 result = access_list_apply(alist, &prefix);
911 }
912
913 imsg_compose_event(iev, IMSG_ACL_CHECK, 0, 0, -1, &result,
914 sizeof(result));
915 }
916
917 struct ldpd_af_conf *
918 ldp_af_conf_get(struct ldpd_conf *xconf, int af)
919 {
920 switch (af) {
921 case AF_INET:
922 return (&xconf->ipv4);
923 case AF_INET6:
924 return (&xconf->ipv6);
925 default:
926 fatalx("ldp_af_conf_get: unknown af");
927 }
928 }
929
930 struct ldpd_af_global *
931 ldp_af_global_get(struct ldpd_global *xglobal, int af)
932 {
933 switch (af) {
934 case AF_INET:
935 return (&xglobal->ipv4);
936 case AF_INET6:
937 return (&xglobal->ipv6);
938 default:
939 fatalx("ldp_af_global_get: unknown af");
940 }
941 }
942
943 int
944 ldp_is_dual_stack(struct ldpd_conf *xconf)
945 {
946 return ((xconf->ipv4.flags & F_LDPD_AF_ENABLED) &&
947 (xconf->ipv6.flags & F_LDPD_AF_ENABLED));
948 }
949
950 in_addr_t
951 ldp_rtr_id_get(struct ldpd_conf *xconf)
952 {
953 if (xconf->rtr_id.s_addr != INADDR_ANY)
954 return (xconf->rtr_id.s_addr);
955 else
956 return (global.rtr_id.s_addr);
957 }
958
959 static int
960 main_imsg_send_config(struct ldpd_conf *xconf)
961 {
962 struct iface *iface;
963 struct tnbr *tnbr;
964 struct nbr_params *nbrp;
965 struct l2vpn *l2vpn;
966 struct l2vpn_if *lif;
967 struct l2vpn_pw *pw;
968
969 if (main_imsg_compose_both(IMSG_RECONF_CONF, xconf,
970 sizeof(*xconf)) == -1)
971 return (-1);
972
973 RB_FOREACH(iface, iface_head, &xconf->iface_tree) {
974 if (main_imsg_compose_both(IMSG_RECONF_IFACE, iface,
975 sizeof(*iface)) == -1)
976 return (-1);
977 }
978
979 RB_FOREACH(tnbr, tnbr_head, &xconf->tnbr_tree) {
980 if (main_imsg_compose_both(IMSG_RECONF_TNBR, tnbr,
981 sizeof(*tnbr)) == -1)
982 return (-1);
983 }
984
985 RB_FOREACH(nbrp, nbrp_head, &xconf->nbrp_tree) {
986 if (main_imsg_compose_both(IMSG_RECONF_NBRP, nbrp,
987 sizeof(*nbrp)) == -1)
988 return (-1);
989 }
990
991 RB_FOREACH(l2vpn, l2vpn_head, &xconf->l2vpn_tree) {
992 if (main_imsg_compose_both(IMSG_RECONF_L2VPN, l2vpn,
993 sizeof(*l2vpn)) == -1)
994 return (-1);
995
996 RB_FOREACH(lif, l2vpn_if_head, &l2vpn->if_tree) {
997 if (main_imsg_compose_both(IMSG_RECONF_L2VPN_IF, lif,
998 sizeof(*lif)) == -1)
999 return (-1);
1000 }
1001 RB_FOREACH(pw, l2vpn_pw_head, &l2vpn->pw_tree) {
1002 if (main_imsg_compose_both(IMSG_RECONF_L2VPN_PW, pw,
1003 sizeof(*pw)) == -1)
1004 return (-1);
1005 }
1006 RB_FOREACH(pw, l2vpn_pw_head, &l2vpn->pw_inactive_tree) {
1007 if (main_imsg_compose_both(IMSG_RECONF_L2VPN_IPW, pw,
1008 sizeof(*pw)) == -1)
1009 return (-1);
1010 }
1011 }
1012
1013 if (main_imsg_compose_both(IMSG_RECONF_END, NULL, 0) == -1)
1014 return (-1);
1015
1016 return (0);
1017 }
1018
1019 int
1020 ldp_config_apply(struct vty *vty, struct ldpd_conf *xconf)
1021 {
1022 /*
1023 * When reading from a configuration file (startup and sighup), we
1024 * call merge_config() only once after the whole config has been read.
1025 * This is the optimal and least disruptive way to update the running
1026 * configuration.
1027 */
1028 if (vty && vty->type == VTY_FILE)
1029 return (0);
1030
1031 ldp_config_normalize(xconf);
1032
1033 if (main_imsg_send_config(xconf) == -1)
1034 return (-1);
1035
1036 merge_config(ldpd_conf, xconf);
1037
1038 return (0);
1039 }
1040
1041 static void
1042 ldp_config_normalize(struct ldpd_conf *xconf)
1043 {
1044 struct iface *iface, *itmp;
1045 struct nbr_params *nbrp, *ntmp;
1046 struct l2vpn *l2vpn;
1047 struct l2vpn_pw *pw, *ptmp;
1048
1049 if (!(xconf->flags & F_LDPD_ENABLED))
1050 ldp_config_reset_main(xconf);
1051 else {
1052 if (!(xconf->ipv4.flags & F_LDPD_AF_ENABLED))
1053 ldp_config_reset_af(xconf, AF_INET);
1054 if (!(xconf->ipv6.flags & F_LDPD_AF_ENABLED))
1055 ldp_config_reset_af(xconf, AF_INET6);
1056
1057 RB_FOREACH_SAFE(iface, iface_head, &xconf->iface_tree, itmp) {
1058 if (iface->ipv4.enabled || iface->ipv6.enabled)
1059 continue;
1060
1061 QOBJ_UNREG(iface);
1062 RB_REMOVE(iface_head, &vty_conf->iface_tree, iface);
1063 free(iface);
1064 }
1065
1066 RB_FOREACH_SAFE(nbrp, nbrp_head, &xconf->nbrp_tree, ntmp) {
1067 if (nbrp->flags & (F_NBRP_KEEPALIVE|F_NBRP_GTSM))
1068 continue;
1069 if (nbrp->auth.method != AUTH_NONE)
1070 continue;
1071
1072 QOBJ_UNREG(nbrp);
1073 RB_REMOVE(nbrp_head, &vty_conf->nbrp_tree, nbrp);
1074 free(nbrp);
1075 }
1076 }
1077
1078 RB_FOREACH(l2vpn, l2vpn_head, &xconf->l2vpn_tree) {
1079 RB_FOREACH_SAFE(pw, l2vpn_pw_head, &l2vpn->pw_tree, ptmp) {
1080 if (!(pw->flags & F_PW_STATIC_NBR_ADDR)) {
1081 pw->af = AF_INET;
1082 pw->addr.v4 = pw->lsr_id;
1083 }
1084
1085 if (pw->lsr_id.s_addr != INADDR_ANY && pw->pwid != 0)
1086 continue;
1087 RB_REMOVE(l2vpn_pw_head, &l2vpn->pw_tree, pw);
1088 RB_INSERT(l2vpn_pw_head, &l2vpn->pw_inactive_tree, pw);
1089 }
1090 RB_FOREACH_SAFE(pw, l2vpn_pw_head, &l2vpn->pw_inactive_tree,
1091 ptmp) {
1092 if (!(pw->flags & F_PW_STATIC_NBR_ADDR)) {
1093 pw->af = AF_INET;
1094 pw->addr.v4 = pw->lsr_id;
1095 }
1096
1097 if (pw->lsr_id.s_addr == INADDR_ANY || pw->pwid == 0)
1098 continue;
1099 RB_REMOVE(l2vpn_pw_head, &l2vpn->pw_inactive_tree, pw);
1100 RB_INSERT(l2vpn_pw_head, &l2vpn->pw_tree, pw);
1101 }
1102 }
1103 }
1104
1105 static void
1106 ldp_config_reset(struct ldpd_conf *conf)
1107 {
1108 ldp_config_reset_main(conf);
1109 ldp_config_reset_l2vpns(conf);
1110 }
1111
1112 static void
1113 ldp_config_reset_main(struct ldpd_conf *conf)
1114 {
1115 struct iface *iface;
1116 struct nbr_params *nbrp;
1117
1118 while (!RB_EMPTY(iface_head, &conf->iface_tree)) {
1119 iface = RB_ROOT(iface_head, &conf->iface_tree);
1120
1121 QOBJ_UNREG(iface);
1122 RB_REMOVE(iface_head, &conf->iface_tree, iface);
1123 free(iface);
1124 }
1125
1126 while (!RB_EMPTY(nbrp_head, &conf->nbrp_tree)) {
1127 nbrp = RB_ROOT(nbrp_head, &conf->nbrp_tree);
1128
1129 QOBJ_UNREG(nbrp);
1130 RB_REMOVE(nbrp_head, &conf->nbrp_tree, nbrp);
1131 free(nbrp);
1132 }
1133
1134 conf->rtr_id.s_addr = INADDR_ANY;
1135 ldp_config_reset_af(conf, AF_INET);
1136 ldp_config_reset_af(conf, AF_INET6);
1137 conf->lhello_holdtime = LINK_DFLT_HOLDTIME;
1138 conf->lhello_interval = DEFAULT_HELLO_INTERVAL;
1139 conf->thello_holdtime = TARGETED_DFLT_HOLDTIME;
1140 conf->thello_interval = DEFAULT_HELLO_INTERVAL;
1141 conf->trans_pref = DUAL_STACK_LDPOV6;
1142 conf->flags = 0;
1143 }
1144
1145 static void
1146 ldp_config_reset_af(struct ldpd_conf *conf, int af)
1147 {
1148 struct ldpd_af_conf *af_conf;
1149 struct iface *iface;
1150 struct iface_af *ia;
1151 struct tnbr *tnbr, *ttmp;
1152
1153 RB_FOREACH(iface, iface_head, &conf->iface_tree) {
1154 ia = iface_af_get(iface, af);
1155 ia->enabled = 0;
1156 }
1157
1158 RB_FOREACH_SAFE(tnbr, tnbr_head, &conf->tnbr_tree, ttmp) {
1159 if (tnbr->af != af)
1160 continue;
1161
1162 QOBJ_UNREG(tnbr);
1163 RB_REMOVE(tnbr_head, &conf->tnbr_tree, tnbr);
1164 free(tnbr);
1165 }
1166
1167 af_conf = ldp_af_conf_get(conf, af);
1168 af_conf->keepalive = 180;
1169 af_conf->lhello_holdtime = 0;
1170 af_conf->lhello_interval = 0;
1171 af_conf->thello_holdtime = 0;
1172 af_conf->thello_interval = 0;
1173 memset(&af_conf->trans_addr, 0, sizeof(af_conf->trans_addr));
1174 af_conf->flags = 0;
1175 }
1176
1177 static void
1178 ldp_config_reset_l2vpns(struct ldpd_conf *conf)
1179 {
1180 struct l2vpn *l2vpn;
1181 struct l2vpn_if *lif;
1182 struct l2vpn_pw *pw;
1183
1184 while (!RB_EMPTY(l2vpn_head, &conf->l2vpn_tree)) {
1185 l2vpn = RB_ROOT(l2vpn_head, &conf->l2vpn_tree);
1186 while (!RB_EMPTY(l2vpn_if_head, &l2vpn->if_tree)) {
1187 lif = RB_ROOT(l2vpn_if_head, &l2vpn->if_tree);
1188
1189 QOBJ_UNREG(lif);
1190 RB_REMOVE(l2vpn_if_head, &l2vpn->if_tree, lif);
1191 free(lif);
1192 }
1193 while (!RB_EMPTY(l2vpn_pw_head, &l2vpn->pw_tree)) {
1194 pw = RB_ROOT(l2vpn_pw_head, &l2vpn->pw_tree);
1195
1196 QOBJ_UNREG(pw);
1197 RB_REMOVE(l2vpn_pw_head, &l2vpn->pw_tree, pw);
1198 free(pw);
1199 }
1200 while (!RB_EMPTY(l2vpn_pw_head, &l2vpn->pw_inactive_tree)) {
1201 pw = RB_ROOT(l2vpn_pw_head, &l2vpn->pw_inactive_tree);
1202
1203 QOBJ_UNREG(pw);
1204 RB_REMOVE(l2vpn_pw_head, &l2vpn->pw_inactive_tree, pw);
1205 free(pw);
1206 }
1207 QOBJ_UNREG(l2vpn);
1208 RB_REMOVE(l2vpn_head, &conf->l2vpn_tree, l2vpn);
1209 free(l2vpn);
1210 }
1211 }
1212
1213 void
1214 ldp_clear_config(struct ldpd_conf *xconf)
1215 {
1216 struct iface *iface;
1217 struct tnbr *tnbr;
1218 struct nbr_params *nbrp;
1219 struct l2vpn *l2vpn;
1220
1221 while (!RB_EMPTY(iface_head, &xconf->iface_tree)) {
1222 iface = RB_ROOT(iface_head, &xconf->iface_tree);
1223
1224 RB_REMOVE(iface_head, &xconf->iface_tree, iface);
1225 free(iface);
1226 }
1227 while (!RB_EMPTY(tnbr_head, &xconf->tnbr_tree)) {
1228 tnbr = RB_ROOT(tnbr_head, &xconf->tnbr_tree);
1229
1230 RB_REMOVE(tnbr_head, &xconf->tnbr_tree, tnbr);
1231 free(tnbr);
1232 }
1233 while (!RB_EMPTY(nbrp_head, &xconf->nbrp_tree)) {
1234 nbrp = RB_ROOT(nbrp_head, &xconf->nbrp_tree);
1235
1236 RB_REMOVE(nbrp_head, &xconf->nbrp_tree, nbrp);
1237 free(nbrp);
1238 }
1239 while (!RB_EMPTY(l2vpn_head, &xconf->l2vpn_tree)) {
1240 l2vpn = RB_ROOT(l2vpn_head, &xconf->l2vpn_tree);
1241
1242 RB_REMOVE(l2vpn_head, &xconf->l2vpn_tree, l2vpn);
1243 l2vpn_del(l2vpn);
1244 }
1245
1246 free(xconf);
1247 }
1248
1249 #define COPY(a, b) do { \
1250 a = malloc(sizeof(*a)); \
1251 if (a == NULL) \
1252 fatal(__func__); \
1253 *a = *b; \
1254 } while (0)
1255
1256 void
1257 merge_config(struct ldpd_conf *conf, struct ldpd_conf *xconf)
1258 {
1259 merge_global(conf, xconf);
1260 merge_af(AF_INET, &conf->ipv4, &xconf->ipv4);
1261 merge_af(AF_INET6, &conf->ipv6, &xconf->ipv6);
1262 merge_ifaces(conf, xconf);
1263 merge_tnbrs(conf, xconf);
1264 merge_nbrps(conf, xconf);
1265 merge_l2vpns(conf, xconf);
1266 }
1267
1268 static void
1269 merge_global(struct ldpd_conf *conf, struct ldpd_conf *xconf)
1270 {
1271 /* change of router-id requires resetting all neighborships */
1272 if (conf->rtr_id.s_addr != xconf->rtr_id.s_addr) {
1273 if (ldpd_process == PROC_LDP_ENGINE) {
1274 ldpe_reset_nbrs(AF_UNSPEC);
1275 if (conf->rtr_id.s_addr == INADDR_ANY ||
1276 xconf->rtr_id.s_addr == INADDR_ANY) {
1277 if_update_all(AF_UNSPEC);
1278 tnbr_update_all(AF_UNSPEC);
1279 }
1280 }
1281 conf->rtr_id = xconf->rtr_id;
1282 }
1283
1284 conf->lhello_holdtime = xconf->lhello_holdtime;
1285 conf->lhello_interval = xconf->lhello_interval;
1286 conf->thello_holdtime = xconf->thello_holdtime;
1287 conf->thello_interval = xconf->thello_interval;
1288
1289 if (conf->trans_pref != xconf->trans_pref) {
1290 if (ldpd_process == PROC_LDP_ENGINE)
1291 ldpe_reset_ds_nbrs();
1292 conf->trans_pref = xconf->trans_pref;
1293 }
1294
1295 if ((conf->flags & F_LDPD_DS_CISCO_INTEROP) !=
1296 (xconf->flags & F_LDPD_DS_CISCO_INTEROP)) {
1297 if (ldpd_process == PROC_LDP_ENGINE)
1298 ldpe_reset_ds_nbrs();
1299 }
1300
1301 conf->flags = xconf->flags;
1302 }
1303
1304 static void
1305 merge_af(int af, struct ldpd_af_conf *af_conf, struct ldpd_af_conf *xa)
1306 {
1307 int stop_init_backoff = 0;
1308 int remove_dynamic_tnbrs = 0;
1309 int change_egress_label = 0;
1310 int reset_nbrs_ipv4 = 0;
1311 int reset_nbrs = 0;
1312 int update_sockets = 0;
1313
1314 /* update timers */
1315 if (af_conf->keepalive != xa->keepalive) {
1316 af_conf->keepalive = xa->keepalive;
1317 stop_init_backoff = 1;
1318 }
1319 af_conf->lhello_holdtime = xa->lhello_holdtime;
1320 af_conf->lhello_interval = xa->lhello_interval;
1321 af_conf->thello_holdtime = xa->thello_holdtime;
1322 af_conf->thello_interval = xa->thello_interval;
1323
1324 /* update flags */
1325 if ((af_conf->flags & F_LDPD_AF_THELLO_ACCEPT) &&
1326 !(xa->flags & F_LDPD_AF_THELLO_ACCEPT))
1327 remove_dynamic_tnbrs = 1;
1328 if ((af_conf->flags & F_LDPD_AF_NO_GTSM) !=
1329 (xa->flags & F_LDPD_AF_NO_GTSM)) {
1330 if (af == AF_INET6)
1331 /* need to set/unset IPV6_MINHOPCOUNT */
1332 update_sockets = 1;
1333 else
1334 /* for LDPv4 just resetting the neighbors is enough */
1335 reset_nbrs_ipv4 = 1;
1336 }
1337 if ((af_conf->flags & F_LDPD_AF_EXPNULL) !=
1338 (xa->flags & F_LDPD_AF_EXPNULL))
1339 change_egress_label = 1;
1340 af_conf->flags = xa->flags;
1341
1342 /* update the transport address */
1343 if (ldp_addrcmp(af, &af_conf->trans_addr, &xa->trans_addr)) {
1344 af_conf->trans_addr = xa->trans_addr;
1345 update_sockets = 1;
1346 }
1347
1348 /* update ACLs */
1349 if (strcmp(af_conf->acl_label_advertise_to,
1350 xa->acl_label_advertise_to) ||
1351 strcmp(af_conf->acl_label_advertise_for,
1352 xa->acl_label_advertise_for) ||
1353 strcmp(af_conf->acl_label_accept_from,
1354 xa->acl_label_accept_from) ||
1355 strcmp(af_conf->acl_label_accept_for,
1356 xa->acl_label_accept_for))
1357 reset_nbrs = 1;
1358 if (strcmp(af_conf->acl_thello_accept_from, xa->acl_thello_accept_from))
1359 remove_dynamic_tnbrs = 1;
1360 if (strcmp(af_conf->acl_label_expnull_for, xa->acl_label_expnull_for))
1361 change_egress_label = 1;
1362 strlcpy(af_conf->acl_thello_accept_from, xa->acl_thello_accept_from,
1363 sizeof(af_conf->acl_thello_accept_from));
1364 strlcpy(af_conf->acl_label_allocate_for, xa->acl_label_allocate_for,
1365 sizeof(af_conf->acl_label_allocate_for));
1366 strlcpy(af_conf->acl_label_advertise_to, xa->acl_label_advertise_to,
1367 sizeof(af_conf->acl_label_advertise_to));
1368 strlcpy(af_conf->acl_label_advertise_for, xa->acl_label_advertise_for,
1369 sizeof(af_conf->acl_label_advertise_for));
1370 strlcpy(af_conf->acl_label_accept_from, xa->acl_label_accept_from,
1371 sizeof(af_conf->acl_label_accept_from));
1372 strlcpy(af_conf->acl_label_accept_for, xa->acl_label_accept_for,
1373 sizeof(af_conf->acl_label_accept_for));
1374 strlcpy(af_conf->acl_label_expnull_for, xa->acl_label_expnull_for,
1375 sizeof(af_conf->acl_label_expnull_for));
1376
1377 /* apply the new configuration */
1378 switch (ldpd_process) {
1379 case PROC_LDE_ENGINE:
1380 if (change_egress_label)
1381 lde_change_egress_label(af);
1382 break;
1383 case PROC_LDP_ENGINE:
1384 if (stop_init_backoff)
1385 ldpe_stop_init_backoff(af);
1386 if (remove_dynamic_tnbrs)
1387 ldpe_remove_dynamic_tnbrs(af);
1388 if (reset_nbrs)
1389 ldpe_reset_nbrs(AF_UNSPEC);
1390 else if (reset_nbrs_ipv4)
1391 ldpe_reset_nbrs(AF_INET);
1392 break;
1393 case PROC_MAIN:
1394 if (update_sockets && iev_ldpe)
1395 imsg_compose_event(iev_ldpe, IMSG_CLOSE_SOCKETS, af,
1396 0, -1, NULL, 0);
1397 break;
1398 }
1399 }
1400
1401 static void
1402 merge_ifaces(struct ldpd_conf *conf, struct ldpd_conf *xconf)
1403 {
1404 struct iface *iface, *itmp, *xi;
1405
1406 RB_FOREACH_SAFE(iface, iface_head, &conf->iface_tree, itmp) {
1407 /* find deleted interfaces */
1408 if ((xi = if_lookup_name(xconf, iface->name)) == NULL) {
1409 switch (ldpd_process) {
1410 case PROC_LDP_ENGINE:
1411 ldpe_if_exit(iface);
1412 break;
1413 case PROC_LDE_ENGINE:
1414 case PROC_MAIN:
1415 break;
1416 }
1417 RB_REMOVE(iface_head, &conf->iface_tree, iface);
1418 free(iface);
1419 }
1420 }
1421 RB_FOREACH_SAFE(xi, iface_head, &xconf->iface_tree, itmp) {
1422 /* find new interfaces */
1423 if ((iface = if_lookup_name(conf, xi->name)) == NULL) {
1424 COPY(iface, xi);
1425 RB_INSERT(iface_head, &conf->iface_tree, iface);
1426
1427 switch (ldpd_process) {
1428 case PROC_LDP_ENGINE:
1429 ldpe_if_init(iface);
1430 break;
1431 case PROC_LDE_ENGINE:
1432 break;
1433 case PROC_MAIN:
1434 /* resend addresses to activate new interfaces */
1435 kif_redistribute(iface->name);
1436 break;
1437 }
1438 continue;
1439 }
1440
1441 /* update existing interfaces */
1442 merge_iface_af(&iface->ipv4, &xi->ipv4);
1443 merge_iface_af(&iface->ipv6, &xi->ipv6);
1444 }
1445 }
1446
1447 static void
1448 merge_iface_af(struct iface_af *ia, struct iface_af *xi)
1449 {
1450 if (ia->enabled != xi->enabled) {
1451 ia->enabled = xi->enabled;
1452 if (ldpd_process == PROC_LDP_ENGINE)
1453 ldp_if_update(ia->iface, ia->af);
1454 }
1455 ia->hello_holdtime = xi->hello_holdtime;
1456 ia->hello_interval = xi->hello_interval;
1457 }
1458
1459 static void
1460 merge_tnbrs(struct ldpd_conf *conf, struct ldpd_conf *xconf)
1461 {
1462 struct tnbr *tnbr, *ttmp, *xt;
1463
1464 RB_FOREACH_SAFE(tnbr, tnbr_head, &conf->tnbr_tree, ttmp) {
1465 if (!(tnbr->flags & F_TNBR_CONFIGURED))
1466 continue;
1467
1468 /* find deleted tnbrs */
1469 if ((xt = tnbr_find(xconf, tnbr->af, &tnbr->addr)) == NULL) {
1470 switch (ldpd_process) {
1471 case PROC_LDP_ENGINE:
1472 tnbr->flags &= ~F_TNBR_CONFIGURED;
1473 tnbr_check(conf, tnbr);
1474 break;
1475 case PROC_LDE_ENGINE:
1476 case PROC_MAIN:
1477 RB_REMOVE(tnbr_head, &conf->tnbr_tree, tnbr);
1478 free(tnbr);
1479 break;
1480 }
1481 }
1482 }
1483 RB_FOREACH_SAFE(xt, tnbr_head, &xconf->tnbr_tree, ttmp) {
1484 /* find new tnbrs */
1485 if ((tnbr = tnbr_find(conf, xt->af, &xt->addr)) == NULL) {
1486 COPY(tnbr, xt);
1487 RB_INSERT(tnbr_head, &conf->tnbr_tree, tnbr);
1488
1489 switch (ldpd_process) {
1490 case PROC_LDP_ENGINE:
1491 tnbr_update(tnbr);
1492 break;
1493 case PROC_LDE_ENGINE:
1494 case PROC_MAIN:
1495 break;
1496 }
1497 continue;
1498 }
1499
1500 /* update existing tnbrs */
1501 if (!(tnbr->flags & F_TNBR_CONFIGURED))
1502 tnbr->flags |= F_TNBR_CONFIGURED;
1503 }
1504 }
1505
1506 static void
1507 merge_nbrps(struct ldpd_conf *conf, struct ldpd_conf *xconf)
1508 {
1509 struct nbr_params *nbrp, *ntmp, *xn;
1510 struct nbr *nbr;
1511 int nbrp_changed;
1512
1513 RB_FOREACH_SAFE(nbrp, nbrp_head, &conf->nbrp_tree, ntmp) {
1514 /* find deleted nbrps */
1515 if ((xn = nbr_params_find(xconf, nbrp->lsr_id)) == NULL) {
1516 switch (ldpd_process) {
1517 case PROC_LDP_ENGINE:
1518 nbr = nbr_find_ldpid(nbrp->lsr_id.s_addr);
1519 if (nbr) {
1520 session_shutdown(nbr, S_SHUTDOWN, 0, 0);
1521 #ifdef __OpenBSD__
1522 pfkey_remove(nbr);
1523 #else
1524 sock_set_md5sig(
1525 (ldp_af_global_get(&global,
1526 nbr->af))->ldp_session_socket,
1527 nbr->af, &nbr->raddr, NULL);
1528 #endif
1529 nbr->auth.method = AUTH_NONE;
1530 if (nbr_session_active_role(nbr))
1531 nbr_establish_connection(nbr);
1532 }
1533 break;
1534 case PROC_LDE_ENGINE:
1535 case PROC_MAIN:
1536 break;
1537 }
1538 RB_REMOVE(nbrp_head, &conf->nbrp_tree, nbrp);
1539 free(nbrp);
1540 }
1541 }
1542 RB_FOREACH_SAFE(xn, nbrp_head, &xconf->nbrp_tree, ntmp) {
1543 /* find new nbrps */
1544 if ((nbrp = nbr_params_find(conf, xn->lsr_id)) == NULL) {
1545 COPY(nbrp, xn);
1546 RB_INSERT(nbrp_head, &conf->nbrp_tree, nbrp);
1547
1548 switch (ldpd_process) {
1549 case PROC_LDP_ENGINE:
1550 nbr = nbr_find_ldpid(nbrp->lsr_id.s_addr);
1551 if (nbr) {
1552 session_shutdown(nbr, S_SHUTDOWN, 0, 0);
1553 nbr->auth.method = nbrp->auth.method;
1554 #ifdef __OpenBSD__
1555 if (pfkey_establish(nbr, nbrp) == -1)
1556 fatalx("pfkey setup failed");
1557 #else
1558 sock_set_md5sig(
1559 (ldp_af_global_get(&global,
1560 nbr->af))->ldp_session_socket,
1561 nbr->af, &nbr->raddr,
1562 nbrp->auth.md5key);
1563 #endif
1564 if (nbr_session_active_role(nbr))
1565 nbr_establish_connection(nbr);
1566 }
1567 break;
1568 case PROC_LDE_ENGINE:
1569 case PROC_MAIN:
1570 break;
1571 }
1572 continue;
1573 }
1574
1575 /* update existing nbrps */
1576 if (nbrp->flags != xn->flags ||
1577 nbrp->keepalive != xn->keepalive ||
1578 nbrp->gtsm_enabled != xn->gtsm_enabled ||
1579 nbrp->gtsm_hops != xn->gtsm_hops ||
1580 nbrp->auth.method != xn->auth.method ||
1581 strcmp(nbrp->auth.md5key, xn->auth.md5key) != 0)
1582 nbrp_changed = 1;
1583 else
1584 nbrp_changed = 0;
1585
1586 nbrp->keepalive = xn->keepalive;
1587 nbrp->gtsm_enabled = xn->gtsm_enabled;
1588 nbrp->gtsm_hops = xn->gtsm_hops;
1589 nbrp->auth.method = xn->auth.method;
1590 strlcpy(nbrp->auth.md5key, xn->auth.md5key,
1591 sizeof(nbrp->auth.md5key));
1592 nbrp->auth.md5key_len = xn->auth.md5key_len;
1593 nbrp->flags = xn->flags;
1594
1595 if (ldpd_process == PROC_LDP_ENGINE) {
1596 nbr = nbr_find_ldpid(nbrp->lsr_id.s_addr);
1597 if (nbr && nbrp_changed) {
1598 session_shutdown(nbr, S_SHUTDOWN, 0, 0);
1599 #ifdef __OpenBSD__
1600 pfkey_remove(nbr);
1601 nbr->auth.method = nbrp->auth.method;
1602 if (pfkey_establish(nbr, nbrp) == -1)
1603 fatalx("pfkey setup failed");
1604 #else
1605 nbr->auth.method = nbrp->auth.method;
1606 sock_set_md5sig((ldp_af_global_get(&global,
1607 nbr->af))->ldp_session_socket, nbr->af,
1608 &nbr->raddr, nbrp->auth.md5key);
1609 #endif
1610 if (nbr_session_active_role(nbr))
1611 nbr_establish_connection(nbr);
1612 }
1613 }
1614 }
1615 }
1616
1617 static void
1618 merge_l2vpns(struct ldpd_conf *conf, struct ldpd_conf *xconf)
1619 {
1620 struct l2vpn *l2vpn, *ltmp, *xl;
1621
1622 RB_FOREACH_SAFE(l2vpn, l2vpn_head, &conf->l2vpn_tree, ltmp) {
1623 /* find deleted l2vpns */
1624 if ((xl = l2vpn_find(xconf, l2vpn->name)) == NULL) {
1625 switch (ldpd_process) {
1626 case PROC_LDE_ENGINE:
1627 l2vpn_exit(l2vpn);
1628 break;
1629 case PROC_LDP_ENGINE:
1630 ldpe_l2vpn_exit(l2vpn);
1631 break;
1632 case PROC_MAIN:
1633 break;
1634 }
1635 RB_REMOVE(l2vpn_head, &conf->l2vpn_tree, l2vpn);
1636 l2vpn_del(l2vpn);
1637 }
1638 }
1639 RB_FOREACH_SAFE(xl, l2vpn_head, &xconf->l2vpn_tree, ltmp) {
1640 /* find new l2vpns */
1641 if ((l2vpn = l2vpn_find(conf, xl->name)) == NULL) {
1642 COPY(l2vpn, xl);
1643 RB_INSERT(l2vpn_head, &conf->l2vpn_tree, l2vpn);
1644 RB_INIT(l2vpn_if_head, &l2vpn->if_tree);
1645 RB_INIT(l2vpn_pw_head, &l2vpn->pw_tree);
1646 RB_INIT(l2vpn_pw_head, &l2vpn->pw_inactive_tree);
1647
1648 switch (ldpd_process) {
1649 case PROC_LDE_ENGINE:
1650 l2vpn_init(l2vpn);
1651 break;
1652 case PROC_LDP_ENGINE:
1653 ldpe_l2vpn_init(l2vpn);
1654 break;
1655 case PROC_MAIN:
1656 break;
1657 }
1658 }
1659
1660 /* update existing l2vpns */
1661 merge_l2vpn(conf, l2vpn, xl);
1662 }
1663 }
1664
1665 static void
1666 merge_l2vpn(struct ldpd_conf *xconf, struct l2vpn *l2vpn, struct l2vpn *xl)
1667 {
1668 struct l2vpn_if *lif, *ftmp, *xf;
1669 struct l2vpn_pw *pw, *ptmp, *xp;
1670 struct nbr *nbr;
1671 int reset_nbr, reinstall_pwfec, reinstall_tnbr;
1672 int previous_pw_type, previous_mtu;
1673
1674 previous_pw_type = l2vpn->pw_type;
1675 previous_mtu = l2vpn->mtu;
1676
1677 /* merge intefaces */
1678 RB_FOREACH_SAFE(lif, l2vpn_if_head, &l2vpn->if_tree, ftmp) {
1679 /* find deleted interfaces */
1680 if ((xf = l2vpn_if_find(xl, lif->ifname)) == NULL) {
1681 RB_REMOVE(l2vpn_if_head, &l2vpn->if_tree, lif);
1682 free(lif);
1683 }
1684 }
1685 RB_FOREACH_SAFE(xf, l2vpn_if_head, &xl->if_tree, ftmp) {
1686 /* find new interfaces */
1687 if ((lif = l2vpn_if_find(l2vpn, xf->ifname)) == NULL) {
1688 COPY(lif, xf);
1689 RB_INSERT(l2vpn_if_head, &l2vpn->if_tree, lif);
1690 lif->l2vpn = l2vpn;
1691
1692 switch (ldpd_process) {
1693 case PROC_LDP_ENGINE:
1694 case PROC_LDE_ENGINE:
1695 break;
1696 case PROC_MAIN:
1697 kif_redistribute(lif->ifname);
1698 break;
1699 }
1700 }
1701 }
1702
1703 /* merge active pseudowires */
1704 RB_FOREACH_SAFE(pw, l2vpn_pw_head, &l2vpn->pw_tree, ptmp) {
1705 /* find deleted active pseudowires */
1706 if ((xp = l2vpn_pw_find_active(xl, pw->ifname)) == NULL) {
1707 switch (ldpd_process) {
1708 case PROC_LDE_ENGINE:
1709 l2vpn_pw_exit(pw);
1710 break;
1711 case PROC_LDP_ENGINE:
1712 ldpe_l2vpn_pw_exit(pw);
1713 break;
1714 case PROC_MAIN:
1715 break;
1716 }
1717
1718 RB_REMOVE(l2vpn_pw_head, &l2vpn->pw_tree, pw);
1719 free(pw);
1720 }
1721 }
1722 RB_FOREACH_SAFE(xp, l2vpn_pw_head, &xl->pw_tree, ptmp) {
1723 /* find new active pseudowires */
1724 if ((pw = l2vpn_pw_find_active(l2vpn, xp->ifname)) == NULL) {
1725 COPY(pw, xp);
1726 RB_INSERT(l2vpn_pw_head, &l2vpn->pw_tree, pw);
1727 pw->l2vpn = l2vpn;
1728
1729 switch (ldpd_process) {
1730 case PROC_LDE_ENGINE:
1731 l2vpn_pw_init(pw);
1732 break;
1733 case PROC_LDP_ENGINE:
1734 ldpe_l2vpn_pw_init(pw);
1735 break;
1736 case PROC_MAIN:
1737 kif_redistribute(pw->ifname);
1738 break;
1739 }
1740 continue;
1741 }
1742
1743 /* update existing active pseudowire */
1744 if (pw->af != xp->af ||
1745 ldp_addrcmp(pw->af, &pw->addr, &xp->addr))
1746 reinstall_tnbr = 1;
1747 else
1748 reinstall_tnbr = 0;
1749
1750 /* changes that require a session restart */
1751 if ((pw->flags & (F_PW_STATUSTLV_CONF|F_PW_CWORD_CONF)) !=
1752 (xp->flags & (F_PW_STATUSTLV_CONF|F_PW_CWORD_CONF)))
1753 reset_nbr = 1;
1754 else
1755 reset_nbr = 0;
1756
1757 if (l2vpn->pw_type != xl->pw_type || l2vpn->mtu != xl->mtu ||
1758 pw->pwid != xp->pwid || reinstall_tnbr || reset_nbr ||
1759 pw->lsr_id.s_addr != xp->lsr_id.s_addr)
1760 reinstall_pwfec = 1;
1761 else
1762 reinstall_pwfec = 0;
1763
1764 if (ldpd_process == PROC_LDP_ENGINE) {
1765 if (reinstall_tnbr)
1766 ldpe_l2vpn_pw_exit(pw);
1767 if (reset_nbr) {
1768 nbr = nbr_find_ldpid(pw->lsr_id.s_addr);
1769 if (nbr && nbr->state == NBR_STA_OPER)
1770 session_shutdown(nbr, S_SHUTDOWN, 0, 0);
1771 }
1772 }
1773 if (ldpd_process == PROC_LDE_ENGINE && reinstall_pwfec)
1774 l2vpn_pw_exit(pw);
1775 pw->lsr_id = xp->lsr_id;
1776 pw->af = xp->af;
1777 pw->addr = xp->addr;
1778 pw->pwid = xp->pwid;
1779 strlcpy(pw->ifname, xp->ifname, sizeof(pw->ifname));
1780 pw->ifindex = xp->ifindex;
1781 if (xp->flags & F_PW_CWORD_CONF)
1782 pw->flags |= F_PW_CWORD_CONF;
1783 else
1784 pw->flags &= ~F_PW_CWORD_CONF;
1785 if (xp->flags & F_PW_STATUSTLV_CONF)
1786 pw->flags |= F_PW_STATUSTLV_CONF;
1787 else
1788 pw->flags &= ~F_PW_STATUSTLV_CONF;
1789 if (xp->flags & F_PW_STATIC_NBR_ADDR)
1790 pw->flags |= F_PW_STATIC_NBR_ADDR;
1791 else
1792 pw->flags &= ~F_PW_STATIC_NBR_ADDR;
1793 if (ldpd_process == PROC_LDP_ENGINE && reinstall_tnbr)
1794 ldpe_l2vpn_pw_init(pw);
1795 if (ldpd_process == PROC_LDE_ENGINE && reinstall_pwfec) {
1796 l2vpn->pw_type = xl->pw_type;
1797 l2vpn->mtu = xl->mtu;
1798 l2vpn_pw_init(pw);
1799 l2vpn->pw_type = previous_pw_type;
1800 l2vpn->mtu = previous_mtu;
1801 }
1802 }
1803
1804 /* merge inactive pseudowires */
1805 RB_FOREACH_SAFE(pw, l2vpn_pw_head, &l2vpn->pw_inactive_tree, ptmp) {
1806 /* find deleted inactive pseudowires */
1807 if ((xp = l2vpn_pw_find_inactive(xl, pw->ifname)) == NULL) {
1808 RB_REMOVE(l2vpn_pw_head, &l2vpn->pw_inactive_tree, pw);
1809 free(pw);
1810 }
1811 }
1812 RB_FOREACH_SAFE(xp, l2vpn_pw_head, &xl->pw_inactive_tree, ptmp) {
1813 /* find new inactive pseudowires */
1814 if ((pw = l2vpn_pw_find_inactive(l2vpn, xp->ifname)) == NULL) {
1815 COPY(pw, xp);
1816 RB_INSERT(l2vpn_pw_head, &l2vpn->pw_inactive_tree, pw);
1817 pw->l2vpn = l2vpn;
1818
1819 switch (ldpd_process) {
1820 case PROC_LDE_ENGINE:
1821 case PROC_LDP_ENGINE:
1822 break;
1823 case PROC_MAIN:
1824 kif_redistribute(pw->ifname);
1825 break;
1826 }
1827 continue;
1828 }
1829
1830 /* update existing inactive pseudowire */
1831 pw->lsr_id.s_addr = xp->lsr_id.s_addr;
1832 pw->af = xp->af;
1833 pw->addr = xp->addr;
1834 pw->pwid = xp->pwid;
1835 strlcpy(pw->ifname, xp->ifname, sizeof(pw->ifname));
1836 pw->ifindex = xp->ifindex;
1837 pw->flags = xp->flags;
1838 }
1839
1840 l2vpn->pw_type = xl->pw_type;
1841 l2vpn->mtu = xl->mtu;
1842 strlcpy(l2vpn->br_ifname, xl->br_ifname, sizeof(l2vpn->br_ifname));
1843 l2vpn->br_ifindex = xl->br_ifindex;
1844 }
1845
1846 struct ldpd_conf *
1847 config_new_empty(void)
1848 {
1849 struct ldpd_conf *xconf;
1850
1851 xconf = calloc(1, sizeof(*xconf));
1852 if (xconf == NULL)
1853 fatal(NULL);
1854
1855 RB_INIT(iface_head, &xconf->iface_tree);
1856 RB_INIT(tnbr_head, &xconf->tnbr_tree);
1857 RB_INIT(nbrp_head, &xconf->nbrp_tree);
1858 RB_INIT(l2vpn_head, &xconf->l2vpn_tree);
1859
1860 /* set default values */
1861 ldp_config_reset(xconf);
1862
1863 return (xconf);
1864 }
1865
1866 void
1867 config_clear(struct ldpd_conf *conf)
1868 {
1869 struct ldpd_conf *xconf;
1870
1871 /*
1872 * Merge current config with an empty config, this will deactivate
1873 * and deallocate all the interfaces, pseudowires and so on. Before
1874 * merging, copy the router-id and other variables to avoid some
1875 * unnecessary operations, like trying to reset the neighborships.
1876 */
1877 xconf = config_new_empty();
1878 xconf->ipv4 = conf->ipv4;
1879 xconf->ipv6 = conf->ipv6;
1880 xconf->rtr_id = conf->rtr_id;
1881 xconf->trans_pref = conf->trans_pref;
1882 xconf->flags = conf->flags;
1883 merge_config(conf, xconf);
1884 free(xconf);
1885 free(conf);
1886 }
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