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edd7c245 | 1 | /* zebra daemon main routine. |
718e3744 | 2 | * Copyright (C) 1997, 98 Kunihiro Ishiguro |
3 | * | |
4 | * This file is part of GNU Zebra. | |
5 | * | |
6 | * GNU Zebra is free software; you can redistribute it and/or modify it | |
7 | * under the terms of the GNU General Public License as published by the | |
8 | * Free Software Foundation; either version 2, or (at your option) any | |
9 | * later version. | |
10 | * | |
11 | * GNU Zebra is distributed in the hope that it will be useful, but | |
12 | * WITHOUT ANY WARRANTY; without even the implied warranty of | |
13 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU | |
14 | * General Public License for more details. | |
15 | * | |
16 | * You should have received a copy of the GNU General Public License | |
17 | * along with GNU Zebra; see the file COPYING. If not, write to the Free | |
18 | * Software Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA | |
19 | * 02111-1307, USA. | |
20 | */ | |
21 | ||
22 | #include <zebra.h> | |
23 | ||
5e4fa164 | 24 | #include <lib/version.h> |
718e3744 | 25 | #include "getopt.h" |
26 | #include "command.h" | |
27 | #include "thread.h" | |
28 | #include "filter.h" | |
29 | #include "memory.h" | |
4a1ab8e4 | 30 | #include "zebra_memory.h" |
fc7948fa | 31 | #include "memory_vty.h" |
718e3744 | 32 | #include "prefix.h" |
33 | #include "log.h" | |
7514fb77 | 34 | #include "plist.h" |
edd7c245 | 35 | #include "privs.h" |
2d75d052 | 36 | #include "sigevent.h" |
b72ede27 | 37 | #include "vrf.h" |
ff1c42fb | 38 | #include "sockopt.h" |
718e3744 | 39 | |
40 | #include "zebra/rib.h" | |
41 | #include "zebra/zserv.h" | |
42 | #include "zebra/debug.h" | |
18a6dce6 | 43 | #include "zebra/router-id.h" |
ca776988 | 44 | #include "zebra/irdp.h" |
a1ac18c4 | 45 | #include "zebra/rtadv.h" |
5adc2528 | 46 | #include "zebra/zebra_fpm.h" |
244c1cdc | 47 | #include "zebra/zebra_ptm.h" |
fe18ee2d | 48 | #include "zebra/zebra_ns.h" |
e2b1be64 | 49 | #include "zebra/redistribute.h" |
7758e3f3 | 50 | #include "zebra/zebra_mpls.h" |
244c1cdc DS |
51 | |
52 | #define ZEBRA_PTM_SUPPORT | |
718e3744 | 53 | |
b21b19c5 | 54 | /* Zebra instance */ |
55 | struct zebra_t zebrad = | |
56 | { | |
57 | .rtm_table_default = 0, | |
58 | }; | |
718e3744 | 59 | |
60 | /* process id. */ | |
718e3744 | 61 | pid_t pid; |
62 | ||
48f8480d MW |
63 | /* VTY Socket prefix */ |
64 | char vty_sock_path[MAXPATHLEN] = ZEBRA_VTYSH_PATH; | |
65 | ||
55c72803 | 66 | /* Pacify zclient.o in libfrr, which expects this variable. */ |
87efd646 | 67 | struct thread_master *master; |
68 | ||
718e3744 | 69 | /* Route retain mode flag. */ |
70 | int retain_mode = 0; | |
71 | ||
6baf7bb8 DS |
72 | /* Allow non-quagga entities to delete quagga routes */ |
73 | int allow_delete = 0; | |
74 | ||
718e3744 | 75 | /* Don't delete kernel route. */ |
76 | int keep_kernel_mode = 0; | |
77 | ||
c34b6b57 | 78 | #ifdef HAVE_NETLINK |
79 | /* Receive buffer size for netlink socket */ | |
b6286c70 | 80 | u_int32_t nl_rcvbufsize = 4194304; |
c34b6b57 | 81 | #endif /* HAVE_NETLINK */ |
82 | ||
718e3744 | 83 | /* Command line options. */ |
48f8480d | 84 | #define OPTION_VTYSOCK 1000 |
718e3744 | 85 | struct option longopts[] = |
86 | { | |
6baf7bb8 DS |
87 | { "batch", no_argument, NULL, 'b'}, |
88 | { "daemon", no_argument, NULL, 'd'}, | |
89 | { "allow_delete", no_argument, NULL, 'a'}, | |
90 | { "keep_kernel", no_argument, NULL, 'k'}, | |
fb0aa886 | 91 | { "fpm_format", required_argument, NULL, 'F'}, |
6baf7bb8 DS |
92 | { "config_file", required_argument, NULL, 'f'}, |
93 | { "pid_file", required_argument, NULL, 'i'}, | |
94 | { "socket", required_argument, NULL, 'z'}, | |
95 | { "help", no_argument, NULL, 'h'}, | |
96 | { "vty_addr", required_argument, NULL, 'A'}, | |
97 | { "vty_port", required_argument, NULL, 'P'}, | |
48f8480d | 98 | { "vty_socket", required_argument, NULL, OPTION_VTYSOCK }, |
37fe7731 | 99 | { "ecmp", required_argument, NULL, 'e'}, |
6baf7bb8 DS |
100 | { "retain", no_argument, NULL, 'r'}, |
101 | { "dryrun", no_argument, NULL, 'C'}, | |
c34b6b57 | 102 | #ifdef HAVE_NETLINK |
6baf7bb8 | 103 | { "nl-bufsize", required_argument, NULL, 's'}, |
c34b6b57 | 104 | #endif /* HAVE_NETLINK */ |
6baf7bb8 DS |
105 | { "user", required_argument, NULL, 'u'}, |
106 | { "group", required_argument, NULL, 'g'}, | |
107 | { "version", no_argument, NULL, 'v'}, | |
718e3744 | 108 | { 0 } |
109 | }; | |
110 | ||
edd7c245 | 111 | zebra_capabilities_t _caps_p [] = |
112 | { | |
ceacedba | 113 | ZCAP_NET_ADMIN, |
edd7c245 | 114 | ZCAP_SYS_ADMIN, |
ceacedba | 115 | ZCAP_NET_RAW, |
edd7c245 | 116 | }; |
117 | ||
118 | /* zebra privileges to run with */ | |
119 | struct zebra_privs_t zserv_privs = | |
120 | { | |
b2f36157 DL |
121 | #if defined(FRR_USER) && defined(FRR_GROUP) |
122 | .user = FRR_USER, | |
123 | .group = FRR_GROUP, | |
edd7c245 | 124 | #endif |
125 | #ifdef VTY_GROUP | |
126 | .vty_group = VTY_GROUP, | |
127 | #endif | |
128 | .caps_p = _caps_p, | |
837d16cc | 129 | .cap_num_p = array_size(_caps_p), |
edd7c245 | 130 | .cap_num_i = 0 |
131 | }; | |
132 | ||
718e3744 | 133 | /* Default configuration file path. */ |
718e3744 | 134 | char config_default[] = SYSCONFDIR DEFAULT_CONFIG_FILE; |
135 | ||
136 | /* Process ID saved for use by init system */ | |
fce954f8 | 137 | const char *pid_file = PATH_ZEBRA_PID; |
718e3744 | 138 | |
37fe7731 DS |
139 | unsigned int multipath_num = MULTIPATH_NUM; |
140 | ||
718e3744 | 141 | /* Help information display. */ |
142 | static void | |
143 | usage (char *progname, int status) | |
144 | { | |
145 | if (status != 0) | |
146 | fprintf (stderr, "Try `%s --help' for more information.\n", progname); | |
147 | else | |
148 | { | |
c34b6b57 | 149 | printf ("Usage : %s [OPTION...]\n\n"\ |
150 | "Daemon which manages kernel routing table management and "\ | |
151 | "redistribution between different routing protocols.\n\n"\ | |
152 | "-b, --batch Runs in batch mode\n"\ | |
153 | "-d, --daemon Runs in daemon mode\n"\ | |
6baf7bb8 | 154 | "-a, --allow_delete Allow other processes to delete Quagga Routes\n" \ |
c34b6b57 | 155 | "-f, --config_file Set configuration file name\n"\ |
fb0aa886 | 156 | "-F, --fpm_format Set fpm format to 'netlink' or 'protobuf'\n"\ |
c34b6b57 | 157 | "-i, --pid_file Set process identifier file name\n"\ |
b5114685 | 158 | "-z, --socket Set path of zebra socket\n"\ |
c34b6b57 | 159 | "-k, --keep_kernel Don't delete old routes which installed by "\ |
160 | "zebra.\n"\ | |
876b8be0 | 161 | "-C, --dryrun Check configuration for validity and exit\n"\ |
c34b6b57 | 162 | "-A, --vty_addr Set vty's bind address\n"\ |
163 | "-P, --vty_port Set vty's port number\n"\ | |
48f8480d | 164 | " --vty_socket Override vty socket path\n"\ |
c34b6b57 | 165 | "-r, --retain When program terminates, retain added route "\ |
166 | "by zebra.\n"\ | |
c065230a | 167 | "-u, --user User to run as\n"\ |
19380819 | 168 | "-g, --group Group to run as\n", progname); |
c34b6b57 | 169 | #ifdef HAVE_NETLINK |
170 | printf ("-s, --nl-bufsize Set netlink receive buffer size\n"); | |
171 | #endif /* HAVE_NETLINK */ | |
172 | printf ("-v, --version Print program version\n"\ | |
173 | "-h, --help Display this help and exit\n"\ | |
174 | "\n"\ | |
b2f36157 | 175 | "Report bugs to %s\n", FRR_BUG_ADDRESS); |
718e3744 | 176 | } |
177 | ||
178 | exit (status); | |
179 | } | |
6b0655a2 | 180 | |
718e3744 | 181 | /* SIGHUP handler. */ |
a1ac18c4 | 182 | static void |
2d75d052 | 183 | sighup (void) |
718e3744 | 184 | { |
185 | zlog_info ("SIGHUP received"); | |
186 | ||
187 | /* Reload of config file. */ | |
188 | ; | |
189 | } | |
190 | ||
191 | /* SIGINT handler. */ | |
a1ac18c4 | 192 | static void |
2d75d052 | 193 | sigint (void) |
718e3744 | 194 | { |
5a8dfcd8 RW |
195 | struct vrf *vrf; |
196 | struct zebra_vrf *zvrf; | |
fe18ee2d DS |
197 | struct zebra_ns *zns; |
198 | ||
887c44a4 | 199 | zlog_notice ("Terminating on signal"); |
718e3744 | 200 | |
ca776988 | 201 | #ifdef HAVE_IRDP |
202 | irdp_finish(); | |
203 | #endif | |
718e3744 | 204 | |
c8ed14dd | 205 | zebra_ptm_finish(); |
5a8dfcd8 RW |
206 | list_delete_all_node (zebrad.client_list); |
207 | ||
208 | if (retain_mode) | |
209 | RB_FOREACH (vrf, vrf_name_head, &vrfs_by_name) | |
210 | { | |
211 | zvrf = vrf->info; | |
212 | if (zvrf) | |
213 | SET_FLAG (zvrf->flags, ZEBRA_VRF_RETAIN); | |
214 | } | |
215 | vrf_terminate (); | |
fe18ee2d DS |
216 | |
217 | zns = zebra_ns_lookup (NS_DEFAULT); | |
218 | zebra_ns_disable (0, (void **)&zns); | |
58ac32e2 RW |
219 | |
220 | access_list_reset (); | |
221 | prefix_list_reset (); | |
222 | route_map_finish (); | |
223 | cmd_terminate (); | |
224 | vty_terminate (); | |
225 | zprivs_terminate (&zserv_privs); | |
226 | list_delete (zebrad.client_list); | |
5a8dfcd8 RW |
227 | work_queue_free (zebrad.ribq); |
228 | if (zebrad.lsp_process_q) | |
229 | work_queue_free (zebrad.lsp_process_q); | |
230 | meta_queue_free (zebrad.mq); | |
58ac32e2 RW |
231 | thread_master_free (zebrad.master); |
232 | if (zlog_default) | |
233 | closezlog (zlog_default); | |
234 | ||
718e3744 | 235 | exit (0); |
236 | } | |
237 | ||
238 | /* SIGUSR1 handler. */ | |
a1ac18c4 | 239 | static void |
2d75d052 | 240 | sigusr1 (void) |
718e3744 | 241 | { |
242 | zlog_rotate (NULL); | |
243 | } | |
244 | ||
2d75d052 | 245 | struct quagga_signal_t zebra_signals[] = |
718e3744 | 246 | { |
2d75d052 | 247 | { |
248 | .signal = SIGHUP, | |
249 | .handler = &sighup, | |
250 | }, | |
251 | { | |
252 | .signal = SIGUSR1, | |
253 | .handler = &sigusr1, | |
254 | }, | |
255 | { | |
256 | .signal = SIGINT, | |
8c903fbb | 257 | .handler = &sigint, |
2d75d052 | 258 | }, |
f571dab0 | 259 | { |
260 | .signal = SIGTERM, | |
261 | .handler = &sigint, | |
262 | }, | |
2d75d052 | 263 | }; |
b72ede27 | 264 | |
718e3744 | 265 | /* Main startup routine. */ |
266 | int | |
267 | main (int argc, char **argv) | |
268 | { | |
269 | char *p; | |
270 | char *vty_addr = NULL; | |
4fc4e7ab | 271 | int vty_port = ZEBRA_VTY_PORT; |
876b8be0 | 272 | int dryrun = 0; |
718e3744 | 273 | int batch_mode = 0; |
274 | int daemon_mode = 0; | |
275 | char *config_file = NULL; | |
276 | char *progname; | |
277 | struct thread thread; | |
b5114685 | 278 | char *zserv_path = NULL; |
fb0aa886 | 279 | char *fpm_format = NULL; |
718e3744 | 280 | |
281 | /* Set umask before anything for security */ | |
282 | umask (0027); | |
283 | ||
284 | /* preserve my name */ | |
285 | progname = ((p = strrchr (argv[0], '/')) ? ++p : argv[0]); | |
286 | ||
7c8ff89e | 287 | zlog_default = openzlog (progname, ZLOG_ZEBRA, 0, |
718e3744 | 288 | LOG_CONS|LOG_NDELAY|LOG_PID, LOG_DAEMON); |
2caa9b39 | 289 | zprivs_init (&zserv_privs); |
c05795b1 SK |
290 | #if defined(HAVE_CUMULUS) |
291 | zlog_set_level (NULL, ZLOG_DEST_SYSLOG, zlog_default->default_lvl); | |
292 | #endif | |
718e3744 | 293 | |
294 | while (1) | |
295 | { | |
296 | int opt; | |
297 | ||
c34b6b57 | 298 | #ifdef HAVE_NETLINK |
fb0aa886 | 299 | opt = getopt_long (argc, argv, "bdakf:F:i:z:hA:P:ru:g:vs:C", longopts, 0); |
c34b6b57 | 300 | #else |
fb0aa886 | 301 | opt = getopt_long (argc, argv, "bdakf:F:i:z:hA:P:ru:g:vC", longopts, 0); |
c34b6b57 | 302 | #endif /* HAVE_NETLINK */ |
718e3744 | 303 | |
304 | if (opt == EOF) | |
305 | break; | |
306 | ||
307 | switch (opt) | |
308 | { | |
309 | case 0: | |
310 | break; | |
311 | case 'b': | |
312 | batch_mode = 1; | |
313 | case 'd': | |
314 | daemon_mode = 1; | |
315 | break; | |
6baf7bb8 DS |
316 | case 'a': |
317 | allow_delete = 1; | |
318 | break; | |
718e3744 | 319 | case 'k': |
320 | keep_kernel_mode = 1; | |
321 | break; | |
876b8be0 PJ |
322 | case 'C': |
323 | dryrun = 1; | |
324 | break; | |
718e3744 | 325 | case 'f': |
326 | config_file = optarg; | |
327 | break; | |
fb0aa886 AS |
328 | case 'F': |
329 | fpm_format = optarg; | |
330 | break; | |
718e3744 | 331 | case 'A': |
332 | vty_addr = optarg; | |
333 | break; | |
37fe7731 DS |
334 | case 'e': |
335 | multipath_num = atoi (optarg); | |
336 | if (multipath_num > MULTIPATH_NUM || multipath_num <= 0) | |
337 | { | |
338 | zlog_err ("Multipath Number specified must be less than %d and greater than 0", MULTIPATH_NUM); | |
339 | return 1; | |
340 | } | |
341 | break; | |
718e3744 | 342 | case 'i': |
343 | pid_file = optarg; | |
344 | break; | |
b5114685 VT |
345 | case 'z': |
346 | zserv_path = optarg; | |
347 | break; | |
718e3744 | 348 | case 'P': |
4fc4e7ab | 349 | /* Deal with atoi() returning 0 on failure, and zebra not |
350 | listening on zebra port... */ | |
351 | if (strcmp(optarg, "0") == 0) | |
352 | { | |
353 | vty_port = 0; | |
354 | break; | |
355 | } | |
718e3744 | 356 | vty_port = atoi (optarg); |
0d6b2ee2 PJ |
357 | if (vty_port <= 0 || vty_port > 0xffff) |
358 | vty_port = ZEBRA_VTY_PORT; | |
718e3744 | 359 | break; |
48f8480d MW |
360 | case OPTION_VTYSOCK: |
361 | set_socket_path(vty_sock_path, ZEBRA_VTYSH_PATH, optarg, sizeof (vty_sock_path)); | |
362 | break; | |
718e3744 | 363 | case 'r': |
364 | retain_mode = 1; | |
365 | break; | |
c34b6b57 | 366 | #ifdef HAVE_NETLINK |
367 | case 's': | |
368 | nl_rcvbufsize = atoi (optarg); | |
369 | break; | |
370 | #endif /* HAVE_NETLINK */ | |
c065230a | 371 | case 'u': |
372 | zserv_privs.user = optarg; | |
373 | break; | |
374 | case 'g': | |
375 | zserv_privs.group = optarg; | |
376 | break; | |
718e3744 | 377 | case 'v': |
378 | print_version (progname); | |
379 | exit (0); | |
380 | break; | |
381 | case 'h': | |
382 | usage (progname, 0); | |
383 | break; | |
384 | default: | |
385 | usage (progname, 1); | |
386 | break; | |
387 | } | |
388 | } | |
389 | ||
390 | /* Make master thread emulator. */ | |
b21b19c5 | 391 | zebrad.master = thread_master_create (); |
718e3744 | 392 | |
393 | /* Vty related initialize. */ | |
837d16cc | 394 | signal_init (zebrad.master, array_size(zebra_signals), zebra_signals); |
718e3744 | 395 | cmd_init (1); |
3ddccf18 | 396 | vty_config_lockless (); |
b21b19c5 | 397 | vty_init (zebrad.master); |
718e3744 | 398 | memory_init (); |
399 | ||
400 | /* Zebra related initialize. */ | |
401 | zebra_init (); | |
402 | rib_init (); | |
403 | zebra_if_init (); | |
404 | zebra_debug_init (); | |
c6ffe645 | 405 | router_id_cmd_init (); |
718e3744 | 406 | zebra_vty_init (); |
407 | access_list_init (); | |
7514fb77 | 408 | prefix_list_init (); |
8da4e946 | 409 | #if defined (HAVE_RTADV) |
cd80d74f | 410 | rtadv_cmd_init (); |
36735ed9 | 411 | #endif |
ca776988 | 412 | #ifdef HAVE_IRDP |
413 | irdp_init(); | |
414 | #endif | |
244c1cdc DS |
415 | /* PTM socket */ |
416 | #ifdef ZEBRA_PTM_SUPPORT | |
417 | zebra_ptm_init(); | |
418 | #endif | |
718e3744 | 419 | |
7758e3f3 | 420 | zebra_mpls_init (); |
fe6c7157 | 421 | zebra_mpls_vty_init (); |
7758e3f3 | 422 | |
718e3744 | 423 | /* For debug purpose. */ |
424 | /* SET_FLAG (zebra_debug_event, ZEBRA_DEBUG_EVENT); */ | |
425 | ||
fe18ee2d DS |
426 | /* Initialize NS( and implicitly the VRF module), and make kernel routing socket. */ |
427 | zebra_ns_init (); | |
718e3744 | 428 | |
718e3744 | 429 | #ifdef HAVE_SNMP |
430 | zebra_snmp_init (); | |
431 | #endif /* HAVE_SNMP */ | |
432 | ||
5adc2528 | 433 | #ifdef HAVE_FPM |
fb0aa886 | 434 | zfpm_init (zebrad.master, 1, 0, fpm_format); |
5adc2528 | 435 | #else |
fb0aa886 | 436 | zfpm_init (zebrad.master, 0, 0, fpm_format); |
5adc2528 AS |
437 | #endif |
438 | ||
91b7351d DO |
439 | /* Process the configuration file. Among other configuration |
440 | * directives we can meet those installing static routes. Such | |
441 | * requests will not be executed immediately, but queued in | |
442 | * zebra->ribq structure until we enter the main execution loop. | |
443 | * The notifications from kernel will show originating PID equal | |
444 | * to that after daemon() completes (if ever called). | |
445 | */ | |
320ec10a | 446 | vty_read_config (config_file, config_default); |
718e3744 | 447 | |
876b8be0 PJ |
448 | /* Don't start execution if we are in dry-run mode */ |
449 | if (dryrun) | |
450 | return(0); | |
451 | ||
718e3744 | 452 | /* Clean up rib. */ |
7a4bb9c5 | 453 | /* rib_weed_tables (); */ |
718e3744 | 454 | |
455 | /* Exit when zebra is working in batch mode. */ | |
456 | if (batch_mode) | |
457 | exit (0); | |
458 | ||
718e3744 | 459 | /* Daemonize. */ |
065de903 SH |
460 | if (daemon_mode && daemon (0, 0) < 0) |
461 | { | |
462 | zlog_err("Zebra daemon failed: %s", strerror(errno)); | |
463 | exit (1); | |
464 | } | |
718e3744 | 465 | |
466 | /* Output pid of zebra. */ | |
467 | pid_output (pid_file); | |
468 | ||
91b7351d DO |
469 | /* After we have successfully acquired the pidfile, we can be sure |
470 | * about being the only copy of zebra process, which is submitting | |
471 | * changes to the FIB. | |
472 | * Clean up zebra-originated routes. The requests will be sent to OS | |
473 | * immediately, so originating PID in notifications from kernel | |
474 | * will be equal to the current getpid(). To know about such routes, | |
475 | * we have to have route_read() called before. | |
476 | */ | |
477 | if (! keep_kernel_mode) | |
478 | rib_sweep_route (); | |
479 | ||
718e3744 | 480 | /* Needed for BSD routing socket. */ |
481 | pid = getpid (); | |
482 | ||
97be79f9 | 483 | /* This must be done only after locking pidfile (bug #403). */ |
b5114685 | 484 | zebra_zserv_socket_init (zserv_path); |
97be79f9 | 485 | |
718e3744 | 486 | /* Make vty server socket. */ |
48f8480d | 487 | vty_serv_sock (vty_addr, vty_port, vty_sock_path); |
718e3744 | 488 | |
887c44a4 | 489 | /* Print banner. */ |
b2f36157 | 490 | zlog_notice ("Zebra %s starting: vty@%d", FRR_VERSION, vty_port); |
887c44a4 | 491 | |
b21b19c5 | 492 | while (thread_fetch (zebrad.master, &thread)) |
718e3744 | 493 | thread_call (&thread); |
494 | ||
495 | /* Not reached... */ | |
e8e1946e | 496 | return 0; |
718e3744 | 497 | } |