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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" | |
30 | #include "prefix.h" | |
31 | #include "log.h" | |
7514fb77 | 32 | #include "plist.h" |
edd7c245 | 33 | #include "privs.h" |
2d75d052 | 34 | #include "sigevent.h" |
b72ede27 | 35 | #include "vrf.h" |
718e3744 | 36 | |
37 | #include "zebra/rib.h" | |
38 | #include "zebra/zserv.h" | |
39 | #include "zebra/debug.h" | |
18a6dce6 | 40 | #include "zebra/router-id.h" |
ca776988 | 41 | #include "zebra/irdp.h" |
a1ac18c4 | 42 | #include "zebra/rtadv.h" |
5adc2528 | 43 | #include "zebra/zebra_fpm.h" |
244c1cdc | 44 | #include "zebra/zebra_ptm.h" |
fe18ee2d | 45 | #include "zebra/zebra_ns.h" |
e2b1be64 | 46 | #include "zebra/redistribute.h" |
244c1cdc DS |
47 | |
48 | #define ZEBRA_PTM_SUPPORT | |
718e3744 | 49 | |
b21b19c5 | 50 | /* Zebra instance */ |
51 | struct zebra_t zebrad = | |
52 | { | |
53 | .rtm_table_default = 0, | |
54 | }; | |
718e3744 | 55 | |
56 | /* process id. */ | |
718e3744 | 57 | pid_t pid; |
58 | ||
87efd646 | 59 | /* Pacify zclient.o in libzebra, which expects this variable. */ |
60 | struct thread_master *master; | |
61 | ||
718e3744 | 62 | /* Route retain mode flag. */ |
63 | int retain_mode = 0; | |
64 | ||
6baf7bb8 DS |
65 | /* Allow non-quagga entities to delete quagga routes */ |
66 | int allow_delete = 0; | |
67 | ||
718e3744 | 68 | /* Don't delete kernel route. */ |
69 | int keep_kernel_mode = 0; | |
70 | ||
c34b6b57 | 71 | #ifdef HAVE_NETLINK |
72 | /* Receive buffer size for netlink socket */ | |
b6286c70 | 73 | u_int32_t nl_rcvbufsize = 4194304; |
c34b6b57 | 74 | #endif /* HAVE_NETLINK */ |
75 | ||
718e3744 | 76 | /* Command line options. */ |
77 | struct option longopts[] = | |
78 | { | |
6baf7bb8 DS |
79 | { "batch", no_argument, NULL, 'b'}, |
80 | { "daemon", no_argument, NULL, 'd'}, | |
81 | { "allow_delete", no_argument, NULL, 'a'}, | |
82 | { "keep_kernel", no_argument, NULL, 'k'}, | |
83 | { "config_file", required_argument, NULL, 'f'}, | |
84 | { "pid_file", required_argument, NULL, 'i'}, | |
85 | { "socket", required_argument, NULL, 'z'}, | |
86 | { "help", no_argument, NULL, 'h'}, | |
87 | { "vty_addr", required_argument, NULL, 'A'}, | |
88 | { "vty_port", required_argument, NULL, 'P'}, | |
89 | { "retain", no_argument, NULL, 'r'}, | |
90 | { "dryrun", no_argument, NULL, 'C'}, | |
c34b6b57 | 91 | #ifdef HAVE_NETLINK |
6baf7bb8 | 92 | { "nl-bufsize", required_argument, NULL, 's'}, |
c34b6b57 | 93 | #endif /* HAVE_NETLINK */ |
6baf7bb8 DS |
94 | { "user", required_argument, NULL, 'u'}, |
95 | { "group", required_argument, NULL, 'g'}, | |
96 | { "version", no_argument, NULL, 'v'}, | |
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 | { | |
d81fadfd | 110 | #if defined(QUAGGA_USER) && defined(QUAGGA_GROUP) |
111 | .user = QUAGGA_USER, | |
112 | .group = QUAGGA_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 | |
128 | /* Help information display. */ | |
129 | static void | |
130 | usage (char *progname, int status) | |
131 | { | |
132 | if (status != 0) | |
133 | fprintf (stderr, "Try `%s --help' for more information.\n", progname); | |
134 | else | |
135 | { | |
c34b6b57 | 136 | printf ("Usage : %s [OPTION...]\n\n"\ |
137 | "Daemon which manages kernel routing table management and "\ | |
138 | "redistribution between different routing protocols.\n\n"\ | |
139 | "-b, --batch Runs in batch mode\n"\ | |
140 | "-d, --daemon Runs in daemon mode\n"\ | |
6baf7bb8 | 141 | "-a, --allow_delete Allow other processes to delete Quagga Routes\n" \ |
c34b6b57 | 142 | "-f, --config_file Set configuration file name\n"\ |
143 | "-i, --pid_file Set process identifier file name\n"\ | |
b5114685 | 144 | "-z, --socket Set path of zebra socket\n"\ |
c34b6b57 | 145 | "-k, --keep_kernel Don't delete old routes which installed by "\ |
146 | "zebra.\n"\ | |
876b8be0 | 147 | "-C, --dryrun Check configuration for validity and exit\n"\ |
c34b6b57 | 148 | "-A, --vty_addr Set vty's bind address\n"\ |
149 | "-P, --vty_port Set vty's port number\n"\ | |
150 | "-r, --retain When program terminates, retain added route "\ | |
151 | "by zebra.\n"\ | |
c065230a | 152 | "-u, --user User to run as\n"\ |
153 | "-g, --group Group to run as\n", progname); | |
c34b6b57 | 154 | #ifdef HAVE_NETLINK |
155 | printf ("-s, --nl-bufsize Set netlink receive buffer size\n"); | |
156 | #endif /* HAVE_NETLINK */ | |
157 | printf ("-v, --version Print program version\n"\ | |
158 | "-h, --help Display this help and exit\n"\ | |
159 | "\n"\ | |
160 | "Report bugs to %s\n", ZEBRA_BUG_ADDRESS); | |
718e3744 | 161 | } |
162 | ||
163 | exit (status); | |
164 | } | |
6b0655a2 | 165 | |
718e3744 | 166 | /* SIGHUP handler. */ |
a1ac18c4 | 167 | static void |
2d75d052 | 168 | sighup (void) |
718e3744 | 169 | { |
170 | zlog_info ("SIGHUP received"); | |
171 | ||
172 | /* Reload of config file. */ | |
173 | ; | |
174 | } | |
175 | ||
176 | /* SIGINT handler. */ | |
a1ac18c4 | 177 | static void |
2d75d052 | 178 | sigint (void) |
718e3744 | 179 | { |
fe18ee2d DS |
180 | struct zebra_ns *zns; |
181 | ||
887c44a4 | 182 | zlog_notice ("Terminating on signal"); |
718e3744 | 183 | |
184 | if (!retain_mode) | |
185 | rib_close (); | |
ca776988 | 186 | #ifdef HAVE_IRDP |
187 | irdp_finish(); | |
188 | #endif | |
718e3744 | 189 | |
c8ed14dd | 190 | zebra_ptm_finish(); |
fe18ee2d DS |
191 | |
192 | zns = zebra_ns_lookup (NS_DEFAULT); | |
193 | zebra_ns_disable (0, (void **)&zns); | |
718e3744 | 194 | exit (0); |
195 | } | |
196 | ||
197 | /* SIGUSR1 handler. */ | |
a1ac18c4 | 198 | static void |
2d75d052 | 199 | sigusr1 (void) |
718e3744 | 200 | { |
201 | zlog_rotate (NULL); | |
202 | } | |
203 | ||
2d75d052 | 204 | struct quagga_signal_t zebra_signals[] = |
718e3744 | 205 | { |
2d75d052 | 206 | { |
207 | .signal = SIGHUP, | |
208 | .handler = &sighup, | |
209 | }, | |
210 | { | |
211 | .signal = SIGUSR1, | |
212 | .handler = &sigusr1, | |
213 | }, | |
214 | { | |
215 | .signal = SIGINT, | |
8c903fbb | 216 | .handler = &sigint, |
2d75d052 | 217 | }, |
f571dab0 | 218 | { |
219 | .signal = SIGTERM, | |
220 | .handler = &sigint, | |
221 | }, | |
2d75d052 | 222 | }; |
b72ede27 | 223 | |
718e3744 | 224 | /* Main startup routine. */ |
225 | int | |
226 | main (int argc, char **argv) | |
227 | { | |
228 | char *p; | |
229 | char *vty_addr = NULL; | |
4fc4e7ab | 230 | int vty_port = ZEBRA_VTY_PORT; |
876b8be0 | 231 | int dryrun = 0; |
718e3744 | 232 | int batch_mode = 0; |
233 | int daemon_mode = 0; | |
234 | char *config_file = NULL; | |
235 | char *progname; | |
236 | struct thread thread; | |
b5114685 | 237 | char *zserv_path = NULL; |
718e3744 | 238 | |
239 | /* Set umask before anything for security */ | |
240 | umask (0027); | |
241 | ||
242 | /* preserve my name */ | |
243 | progname = ((p = strrchr (argv[0], '/')) ? ++p : argv[0]); | |
244 | ||
7c8ff89e | 245 | zlog_default = openzlog (progname, ZLOG_ZEBRA, 0, |
718e3744 | 246 | LOG_CONS|LOG_NDELAY|LOG_PID, LOG_DAEMON); |
2caa9b39 | 247 | zprivs_init (&zserv_privs); |
c05795b1 SK |
248 | #if defined(HAVE_CUMULUS) |
249 | zlog_set_level (NULL, ZLOG_DEST_SYSLOG, zlog_default->default_lvl); | |
250 | #endif | |
718e3744 | 251 | |
252 | while (1) | |
253 | { | |
254 | int opt; | |
255 | ||
c34b6b57 | 256 | #ifdef HAVE_NETLINK |
6baf7bb8 | 257 | opt = getopt_long (argc, argv, "bdakf:i:z:hA:P:ru:g:vs:C", longopts, 0); |
c34b6b57 | 258 | #else |
6baf7bb8 | 259 | opt = getopt_long (argc, argv, "bdakf:i:z:hA:P:ru:g:vC", longopts, 0); |
c34b6b57 | 260 | #endif /* HAVE_NETLINK */ |
718e3744 | 261 | |
262 | if (opt == EOF) | |
263 | break; | |
264 | ||
265 | switch (opt) | |
266 | { | |
267 | case 0: | |
268 | break; | |
269 | case 'b': | |
270 | batch_mode = 1; | |
271 | case 'd': | |
272 | daemon_mode = 1; | |
273 | break; | |
6baf7bb8 DS |
274 | case 'a': |
275 | allow_delete = 1; | |
276 | break; | |
718e3744 | 277 | case 'k': |
278 | keep_kernel_mode = 1; | |
279 | break; | |
876b8be0 PJ |
280 | case 'C': |
281 | dryrun = 1; | |
282 | break; | |
718e3744 | 283 | case 'f': |
284 | config_file = optarg; | |
285 | break; | |
286 | case 'A': | |
287 | vty_addr = optarg; | |
288 | break; | |
289 | case 'i': | |
290 | pid_file = optarg; | |
291 | break; | |
b5114685 VT |
292 | case 'z': |
293 | zserv_path = optarg; | |
294 | break; | |
718e3744 | 295 | case 'P': |
4fc4e7ab | 296 | /* Deal with atoi() returning 0 on failure, and zebra not |
297 | listening on zebra port... */ | |
298 | if (strcmp(optarg, "0") == 0) | |
299 | { | |
300 | vty_port = 0; | |
301 | break; | |
302 | } | |
718e3744 | 303 | vty_port = atoi (optarg); |
0d6b2ee2 PJ |
304 | if (vty_port <= 0 || vty_port > 0xffff) |
305 | vty_port = ZEBRA_VTY_PORT; | |
718e3744 | 306 | break; |
307 | case 'r': | |
308 | retain_mode = 1; | |
309 | break; | |
c34b6b57 | 310 | #ifdef HAVE_NETLINK |
311 | case 's': | |
312 | nl_rcvbufsize = atoi (optarg); | |
313 | break; | |
314 | #endif /* HAVE_NETLINK */ | |
c065230a | 315 | case 'u': |
316 | zserv_privs.user = optarg; | |
317 | break; | |
318 | case 'g': | |
319 | zserv_privs.group = optarg; | |
320 | break; | |
718e3744 | 321 | case 'v': |
322 | print_version (progname); | |
323 | exit (0); | |
324 | break; | |
325 | case 'h': | |
326 | usage (progname, 0); | |
327 | break; | |
328 | default: | |
329 | usage (progname, 1); | |
330 | break; | |
331 | } | |
332 | } | |
333 | ||
334 | /* Make master thread emulator. */ | |
b21b19c5 | 335 | zebrad.master = thread_master_create (); |
718e3744 | 336 | |
337 | /* Vty related initialize. */ | |
837d16cc | 338 | signal_init (zebrad.master, array_size(zebra_signals), zebra_signals); |
718e3744 | 339 | cmd_init (1); |
b21b19c5 | 340 | vty_init (zebrad.master); |
718e3744 | 341 | memory_init (); |
342 | ||
343 | /* Zebra related initialize. */ | |
344 | zebra_init (); | |
345 | rib_init (); | |
346 | zebra_if_init (); | |
347 | zebra_debug_init (); | |
c6ffe645 | 348 | router_id_cmd_init (); |
718e3744 | 349 | zebra_vty_init (); |
350 | access_list_init (); | |
7514fb77 | 351 | prefix_list_init (); |
8da4e946 | 352 | #if defined (HAVE_RTADV) |
cd80d74f | 353 | rtadv_cmd_init (); |
36735ed9 | 354 | #endif |
ca776988 | 355 | #ifdef HAVE_IRDP |
356 | irdp_init(); | |
357 | #endif | |
244c1cdc DS |
358 | /* PTM socket */ |
359 | #ifdef ZEBRA_PTM_SUPPORT | |
360 | zebra_ptm_init(); | |
361 | #endif | |
718e3744 | 362 | |
363 | /* For debug purpose. */ | |
364 | /* SET_FLAG (zebra_debug_event, ZEBRA_DEBUG_EVENT); */ | |
365 | ||
fe18ee2d DS |
366 | /* Initialize NS( and implicitly the VRF module), and make kernel routing socket. */ |
367 | zebra_ns_init (); | |
718e3744 | 368 | |
718e3744 | 369 | #ifdef HAVE_SNMP |
370 | zebra_snmp_init (); | |
371 | #endif /* HAVE_SNMP */ | |
372 | ||
5adc2528 AS |
373 | #ifdef HAVE_FPM |
374 | zfpm_init (zebrad.master, 1, 0); | |
375 | #else | |
376 | zfpm_init (zebrad.master, 0, 0); | |
377 | #endif | |
378 | ||
91b7351d DO |
379 | /* Process the configuration file. Among other configuration |
380 | * directives we can meet those installing static routes. Such | |
381 | * requests will not be executed immediately, but queued in | |
382 | * zebra->ribq structure until we enter the main execution loop. | |
383 | * The notifications from kernel will show originating PID equal | |
384 | * to that after daemon() completes (if ever called). | |
385 | */ | |
320ec10a | 386 | vty_read_config (config_file, config_default); |
718e3744 | 387 | |
876b8be0 PJ |
388 | /* Don't start execution if we are in dry-run mode */ |
389 | if (dryrun) | |
390 | return(0); | |
391 | ||
718e3744 | 392 | /* Clean up rib. */ |
7a4bb9c5 | 393 | /* rib_weed_tables (); */ |
718e3744 | 394 | |
395 | /* Exit when zebra is working in batch mode. */ | |
396 | if (batch_mode) | |
397 | exit (0); | |
398 | ||
718e3744 | 399 | /* Daemonize. */ |
065de903 SH |
400 | if (daemon_mode && daemon (0, 0) < 0) |
401 | { | |
402 | zlog_err("Zebra daemon failed: %s", strerror(errno)); | |
403 | exit (1); | |
404 | } | |
718e3744 | 405 | |
406 | /* Output pid of zebra. */ | |
407 | pid_output (pid_file); | |
408 | ||
91b7351d DO |
409 | /* After we have successfully acquired the pidfile, we can be sure |
410 | * about being the only copy of zebra process, which is submitting | |
411 | * changes to the FIB. | |
412 | * Clean up zebra-originated routes. The requests will be sent to OS | |
413 | * immediately, so originating PID in notifications from kernel | |
414 | * will be equal to the current getpid(). To know about such routes, | |
415 | * we have to have route_read() called before. | |
416 | */ | |
417 | if (! keep_kernel_mode) | |
418 | rib_sweep_route (); | |
419 | ||
718e3744 | 420 | /* Needed for BSD routing socket. */ |
421 | pid = getpid (); | |
422 | ||
97be79f9 | 423 | /* This must be done only after locking pidfile (bug #403). */ |
b5114685 | 424 | zebra_zserv_socket_init (zserv_path); |
97be79f9 | 425 | |
718e3744 | 426 | /* Make vty server socket. */ |
4fc4e7ab | 427 | vty_serv_sock (vty_addr, vty_port, ZEBRA_VTYSH_PATH); |
718e3744 | 428 | |
887c44a4 | 429 | /* Print banner. */ |
430 | zlog_notice ("Zebra %s starting: vty@%d", QUAGGA_VERSION, vty_port); | |
431 | ||
b21b19c5 | 432 | while (thread_fetch (zebrad.master, &thread)) |
718e3744 | 433 | thread_call (&thread); |
434 | ||
435 | /* Not reached... */ | |
e8e1946e | 436 | return 0; |
718e3744 | 437 | } |