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