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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" |
4f04a76b | 38 | #include "libfrr.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 | ||
55c72803 | 63 | /* Pacify zclient.o in libfrr, which expects this variable. */ |
87efd646 | 64 | struct thread_master *master; |
65 | ||
718e3744 | 66 | /* Route retain mode flag. */ |
67 | int retain_mode = 0; | |
68 | ||
6baf7bb8 DS |
69 | /* Allow non-quagga entities to delete quagga routes */ |
70 | int allow_delete = 0; | |
71 | ||
718e3744 | 72 | /* Don't delete kernel route. */ |
73 | int keep_kernel_mode = 0; | |
74 | ||
c34b6b57 | 75 | #ifdef HAVE_NETLINK |
76 | /* Receive buffer size for netlink socket */ | |
b6286c70 | 77 | u_int32_t nl_rcvbufsize = 4194304; |
c34b6b57 | 78 | #endif /* HAVE_NETLINK */ |
79 | ||
718e3744 | 80 | /* Command line options. */ |
81 | struct option longopts[] = | |
82 | { | |
6baf7bb8 DS |
83 | { "batch", no_argument, NULL, 'b'}, |
84 | { "daemon", no_argument, NULL, 'd'}, | |
85 | { "allow_delete", no_argument, NULL, 'a'}, | |
86 | { "keep_kernel", no_argument, NULL, 'k'}, | |
fb0aa886 | 87 | { "fpm_format", required_argument, NULL, 'F'}, |
6baf7bb8 DS |
88 | { "config_file", required_argument, NULL, 'f'}, |
89 | { "pid_file", required_argument, NULL, 'i'}, | |
90 | { "socket", required_argument, NULL, 'z'}, | |
37fe7731 | 91 | { "ecmp", required_argument, NULL, 'e'}, |
6baf7bb8 DS |
92 | { "retain", no_argument, NULL, 'r'}, |
93 | { "dryrun", no_argument, NULL, 'C'}, | |
c34b6b57 | 94 | #ifdef HAVE_NETLINK |
6baf7bb8 | 95 | { "nl-bufsize", required_argument, NULL, 's'}, |
c34b6b57 | 96 | #endif /* HAVE_NETLINK */ |
718e3744 | 97 | { 0 } |
98 | }; | |
99 | ||
edd7c245 | 100 | zebra_capabilities_t _caps_p [] = |
101 | { | |
ceacedba | 102 | ZCAP_NET_ADMIN, |
edd7c245 | 103 | ZCAP_SYS_ADMIN, |
ceacedba | 104 | ZCAP_NET_RAW, |
edd7c245 | 105 | }; |
106 | ||
107 | /* zebra privileges to run with */ | |
108 | struct zebra_privs_t zserv_privs = | |
109 | { | |
b2f36157 DL |
110 | #if defined(FRR_USER) && defined(FRR_GROUP) |
111 | .user = FRR_USER, | |
112 | .group = FRR_GROUP, | |
edd7c245 | 113 | #endif |
114 | #ifdef VTY_GROUP | |
115 | .vty_group = VTY_GROUP, | |
116 | #endif | |
117 | .caps_p = _caps_p, | |
837d16cc | 118 | .cap_num_p = array_size(_caps_p), |
edd7c245 | 119 | .cap_num_i = 0 |
120 | }; | |
121 | ||
718e3744 | 122 | /* Default configuration file path. */ |
718e3744 | 123 | char config_default[] = SYSCONFDIR DEFAULT_CONFIG_FILE; |
124 | ||
125 | /* Process ID saved for use by init system */ | |
fce954f8 | 126 | const char *pid_file = PATH_ZEBRA_PID; |
718e3744 | 127 | |
37fe7731 DS |
128 | unsigned int multipath_num = MULTIPATH_NUM; |
129 | ||
718e3744 | 130 | /* SIGHUP handler. */ |
a1ac18c4 | 131 | static void |
2d75d052 | 132 | sighup (void) |
718e3744 | 133 | { |
134 | zlog_info ("SIGHUP received"); | |
135 | ||
136 | /* Reload of config file. */ | |
137 | ; | |
138 | } | |
139 | ||
140 | /* SIGINT handler. */ | |
a1ac18c4 | 141 | static void |
2d75d052 | 142 | sigint (void) |
718e3744 | 143 | { |
5a8dfcd8 RW |
144 | struct vrf *vrf; |
145 | struct zebra_vrf *zvrf; | |
fe18ee2d DS |
146 | struct zebra_ns *zns; |
147 | ||
887c44a4 | 148 | zlog_notice ("Terminating on signal"); |
718e3744 | 149 | |
ca776988 | 150 | #ifdef HAVE_IRDP |
151 | irdp_finish(); | |
152 | #endif | |
718e3744 | 153 | |
c8ed14dd | 154 | zebra_ptm_finish(); |
5a8dfcd8 RW |
155 | list_delete_all_node (zebrad.client_list); |
156 | ||
157 | if (retain_mode) | |
158 | RB_FOREACH (vrf, vrf_name_head, &vrfs_by_name) | |
159 | { | |
160 | zvrf = vrf->info; | |
161 | if (zvrf) | |
162 | SET_FLAG (zvrf->flags, ZEBRA_VRF_RETAIN); | |
163 | } | |
164 | vrf_terminate (); | |
fe18ee2d DS |
165 | |
166 | zns = zebra_ns_lookup (NS_DEFAULT); | |
167 | zebra_ns_disable (0, (void **)&zns); | |
58ac32e2 RW |
168 | |
169 | access_list_reset (); | |
170 | prefix_list_reset (); | |
171 | route_map_finish (); | |
172 | cmd_terminate (); | |
173 | vty_terminate (); | |
174 | zprivs_terminate (&zserv_privs); | |
175 | list_delete (zebrad.client_list); | |
5a8dfcd8 RW |
176 | work_queue_free (zebrad.ribq); |
177 | if (zebrad.lsp_process_q) | |
178 | work_queue_free (zebrad.lsp_process_q); | |
179 | meta_queue_free (zebrad.mq); | |
58ac32e2 RW |
180 | thread_master_free (zebrad.master); |
181 | if (zlog_default) | |
182 | closezlog (zlog_default); | |
183 | ||
718e3744 | 184 | exit (0); |
185 | } | |
186 | ||
187 | /* SIGUSR1 handler. */ | |
a1ac18c4 | 188 | static void |
2d75d052 | 189 | sigusr1 (void) |
718e3744 | 190 | { |
191 | zlog_rotate (NULL); | |
192 | } | |
193 | ||
2d75d052 | 194 | struct quagga_signal_t zebra_signals[] = |
718e3744 | 195 | { |
2d75d052 | 196 | { |
197 | .signal = SIGHUP, | |
198 | .handler = &sighup, | |
199 | }, | |
200 | { | |
201 | .signal = SIGUSR1, | |
202 | .handler = &sigusr1, | |
203 | }, | |
204 | { | |
205 | .signal = SIGINT, | |
8c903fbb | 206 | .handler = &sigint, |
2d75d052 | 207 | }, |
f571dab0 | 208 | { |
209 | .signal = SIGTERM, | |
210 | .handler = &sigint, | |
211 | }, | |
2d75d052 | 212 | }; |
b72ede27 | 213 | |
4f04a76b DL |
214 | FRR_DAEMON_INFO(zebra, ZEBRA, |
215 | .vty_port = ZEBRA_VTY_PORT, | |
216 | ||
217 | .proghelp = "Daemon which manages kernel routing table management " | |
218 | "and\nredistribution between different routing protocols.", | |
219 | ||
220 | .signals = zebra_signals, | |
221 | .n_signals = array_size(zebra_signals), | |
222 | ||
223 | .privs = &zserv_privs, | |
224 | ) | |
225 | ||
718e3744 | 226 | /* Main startup routine. */ |
227 | int | |
228 | main (int argc, char **argv) | |
229 | { | |
876b8be0 | 230 | int dryrun = 0; |
718e3744 | 231 | int batch_mode = 0; |
232 | int daemon_mode = 0; | |
233 | char *config_file = NULL; | |
718e3744 | 234 | struct thread thread; |
b5114685 | 235 | char *zserv_path = NULL; |
fb0aa886 | 236 | char *fpm_format = NULL; |
718e3744 | 237 | |
4f04a76b | 238 | frr_preinit(&zebra_di, argc, argv); |
718e3744 | 239 | |
4f04a76b DL |
240 | frr_opt_add("bdakf:F:i:z:rC" |
241 | #ifdef HAVE_NETLINK | |
242 | "s:" | |
c05795b1 | 243 | #endif |
4f04a76b DL |
244 | , longopts, |
245 | "-b, --batch Runs in batch mode\n" | |
246 | "-d, --daemon Runs in daemon mode\n" | |
247 | "-a, --allow_delete Allow other processes to delete Quagga Routes\n" | |
248 | "-f, --config_file Set configuration file name\n" | |
249 | "-F, --fpm_format Set fpm format to 'netlink' or 'protobuf'\n" | |
250 | "-i, --pid_file Set process identifier file name\n" | |
251 | "-z, --socket Set path of zebra socket\n" | |
252 | "-k, --keep_kernel Don't delete old routes which installed by zebra.\n" | |
253 | "-C, --dryrun Check configuration for validity and exit\n" | |
254 | "-r, --retain When program terminates, retain added route by zebra.\n" | |
255 | #ifdef HAVE_NETLINK | |
256 | "-s, --nl-bufsize Set netlink receive buffer size\n" | |
257 | #endif /* HAVE_NETLINK */ | |
258 | ); | |
718e3744 | 259 | |
4f04a76b | 260 | while (1) |
718e3744 | 261 | { |
4f04a76b | 262 | int opt = frr_getopt(argc, argv, NULL); |
718e3744 | 263 | |
264 | if (opt == EOF) | |
265 | break; | |
266 | ||
267 | switch (opt) | |
268 | { | |
269 | case 0: | |
270 | break; | |
271 | case 'b': | |
272 | batch_mode = 1; | |
273 | case 'd': | |
274 | daemon_mode = 1; | |
275 | break; | |
6baf7bb8 DS |
276 | case 'a': |
277 | allow_delete = 1; | |
278 | break; | |
718e3744 | 279 | case 'k': |
280 | keep_kernel_mode = 1; | |
281 | break; | |
876b8be0 PJ |
282 | case 'C': |
283 | dryrun = 1; | |
284 | break; | |
718e3744 | 285 | case 'f': |
286 | config_file = optarg; | |
287 | break; | |
fb0aa886 AS |
288 | case 'F': |
289 | fpm_format = optarg; | |
290 | break; | |
37fe7731 DS |
291 | case 'e': |
292 | multipath_num = atoi (optarg); | |
293 | if (multipath_num > MULTIPATH_NUM || multipath_num <= 0) | |
294 | { | |
295 | zlog_err ("Multipath Number specified must be less than %d and greater than 0", MULTIPATH_NUM); | |
296 | return 1; | |
297 | } | |
298 | break; | |
718e3744 | 299 | case 'i': |
300 | pid_file = optarg; | |
301 | break; | |
b5114685 VT |
302 | case 'z': |
303 | zserv_path = optarg; | |
304 | break; | |
718e3744 | 305 | case 'r': |
306 | retain_mode = 1; | |
307 | break; | |
c34b6b57 | 308 | #ifdef HAVE_NETLINK |
309 | case 's': | |
310 | nl_rcvbufsize = atoi (optarg); | |
311 | break; | |
312 | #endif /* HAVE_NETLINK */ | |
718e3744 | 313 | default: |
4f04a76b | 314 | frr_help_exit (1); |
718e3744 | 315 | break; |
316 | } | |
317 | } | |
318 | ||
4f04a76b | 319 | zebrad.master = frr_init(); |
718e3744 | 320 | |
718e3744 | 321 | cmd_init (1); |
3ddccf18 | 322 | vty_config_lockless (); |
b21b19c5 | 323 | vty_init (zebrad.master); |
718e3744 | 324 | memory_init (); |
325 | ||
326 | /* Zebra related initialize. */ | |
327 | zebra_init (); | |
328 | rib_init (); | |
329 | zebra_if_init (); | |
330 | zebra_debug_init (); | |
c6ffe645 | 331 | router_id_cmd_init (); |
718e3744 | 332 | zebra_vty_init (); |
333 | access_list_init (); | |
7514fb77 | 334 | prefix_list_init (); |
8da4e946 | 335 | #if defined (HAVE_RTADV) |
cd80d74f | 336 | rtadv_cmd_init (); |
36735ed9 | 337 | #endif |
ca776988 | 338 | #ifdef HAVE_IRDP |
339 | irdp_init(); | |
340 | #endif | |
244c1cdc DS |
341 | /* PTM socket */ |
342 | #ifdef ZEBRA_PTM_SUPPORT | |
343 | zebra_ptm_init(); | |
344 | #endif | |
718e3744 | 345 | |
7758e3f3 | 346 | zebra_mpls_init (); |
fe6c7157 | 347 | zebra_mpls_vty_init (); |
7758e3f3 | 348 | |
718e3744 | 349 | /* For debug purpose. */ |
350 | /* SET_FLAG (zebra_debug_event, ZEBRA_DEBUG_EVENT); */ | |
351 | ||
fe18ee2d DS |
352 | /* Initialize NS( and implicitly the VRF module), and make kernel routing socket. */ |
353 | zebra_ns_init (); | |
718e3744 | 354 | |
718e3744 | 355 | #ifdef HAVE_SNMP |
356 | zebra_snmp_init (); | |
357 | #endif /* HAVE_SNMP */ | |
358 | ||
5adc2528 | 359 | #ifdef HAVE_FPM |
fb0aa886 | 360 | zfpm_init (zebrad.master, 1, 0, fpm_format); |
5adc2528 | 361 | #else |
fb0aa886 | 362 | zfpm_init (zebrad.master, 0, 0, fpm_format); |
5adc2528 AS |
363 | #endif |
364 | ||
91b7351d DO |
365 | /* Process the configuration file. Among other configuration |
366 | * directives we can meet those installing static routes. Such | |
367 | * requests will not be executed immediately, but queued in | |
368 | * zebra->ribq structure until we enter the main execution loop. | |
369 | * The notifications from kernel will show originating PID equal | |
370 | * to that after daemon() completes (if ever called). | |
371 | */ | |
320ec10a | 372 | vty_read_config (config_file, config_default); |
718e3744 | 373 | |
876b8be0 PJ |
374 | /* Don't start execution if we are in dry-run mode */ |
375 | if (dryrun) | |
376 | return(0); | |
377 | ||
718e3744 | 378 | /* Clean up rib. */ |
7a4bb9c5 | 379 | /* rib_weed_tables (); */ |
718e3744 | 380 | |
381 | /* Exit when zebra is working in batch mode. */ | |
382 | if (batch_mode) | |
383 | exit (0); | |
384 | ||
718e3744 | 385 | /* Daemonize. */ |
065de903 SH |
386 | if (daemon_mode && daemon (0, 0) < 0) |
387 | { | |
388 | zlog_err("Zebra daemon failed: %s", strerror(errno)); | |
389 | exit (1); | |
390 | } | |
718e3744 | 391 | |
392 | /* Output pid of zebra. */ | |
393 | pid_output (pid_file); | |
394 | ||
91b7351d DO |
395 | /* After we have successfully acquired the pidfile, we can be sure |
396 | * about being the only copy of zebra process, which is submitting | |
397 | * changes to the FIB. | |
398 | * Clean up zebra-originated routes. The requests will be sent to OS | |
399 | * immediately, so originating PID in notifications from kernel | |
400 | * will be equal to the current getpid(). To know about such routes, | |
401 | * we have to have route_read() called before. | |
402 | */ | |
403 | if (! keep_kernel_mode) | |
404 | rib_sweep_route (); | |
405 | ||
718e3744 | 406 | /* Needed for BSD routing socket. */ |
407 | pid = getpid (); | |
408 | ||
97be79f9 | 409 | /* This must be done only after locking pidfile (bug #403). */ |
b5114685 | 410 | zebra_zserv_socket_init (zserv_path); |
97be79f9 | 411 | |
4f04a76b | 412 | frr_vty_serv (ZEBRA_VTYSH_PATH); |
718e3744 | 413 | |
887c44a4 | 414 | /* Print banner. */ |
4f04a76b | 415 | zlog_notice ("Zebra %s starting: vty@%d", FRR_VERSION, zebra_di.vty_port); |
887c44a4 | 416 | |
b21b19c5 | 417 | while (thread_fetch (zebrad.master, &thread)) |
718e3744 | 418 | thread_call (&thread); |
419 | ||
420 | /* Not reached... */ | |
e8e1946e | 421 | return 0; |
718e3744 | 422 | } |