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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" |
244c1cdc DS |
49 | |
50 | #define ZEBRA_PTM_SUPPORT | |
718e3744 | 51 | |
b21b19c5 | 52 | /* Zebra instance */ |
53 | struct zebra_t zebrad = | |
54 | { | |
55 | .rtm_table_default = 0, | |
56 | }; | |
718e3744 | 57 | |
58 | /* process id. */ | |
718e3744 | 59 | pid_t pid; |
60 | ||
87efd646 | 61 | /* Pacify zclient.o in libzebra, which expects this variable. */ |
62 | struct thread_master *master; | |
63 | ||
718e3744 | 64 | /* Route retain mode flag. */ |
65 | int retain_mode = 0; | |
66 | ||
6baf7bb8 DS |
67 | /* Allow non-quagga entities to delete quagga routes */ |
68 | int allow_delete = 0; | |
69 | ||
718e3744 | 70 | /* Don't delete kernel route. */ |
71 | int keep_kernel_mode = 0; | |
72 | ||
c34b6b57 | 73 | #ifdef HAVE_NETLINK |
74 | /* Receive buffer size for netlink socket */ | |
b6286c70 | 75 | u_int32_t nl_rcvbufsize = 4194304; |
c34b6b57 | 76 | #endif /* HAVE_NETLINK */ |
77 | ||
718e3744 | 78 | /* Command line options. */ |
79 | struct option longopts[] = | |
80 | { | |
6baf7bb8 DS |
81 | { "batch", no_argument, NULL, 'b'}, |
82 | { "daemon", no_argument, NULL, 'd'}, | |
83 | { "allow_delete", no_argument, NULL, 'a'}, | |
84 | { "keep_kernel", no_argument, NULL, 'k'}, | |
85 | { "config_file", required_argument, NULL, 'f'}, | |
86 | { "pid_file", required_argument, NULL, 'i'}, | |
87 | { "socket", required_argument, NULL, 'z'}, | |
88 | { "help", no_argument, NULL, 'h'}, | |
89 | { "vty_addr", required_argument, NULL, 'A'}, | |
90 | { "vty_port", required_argument, NULL, 'P'}, | |
91 | { "retain", no_argument, NULL, 'r'}, | |
92 | { "dryrun", no_argument, NULL, 'C'}, | |
c34b6b57 | 93 | #ifdef HAVE_NETLINK |
6baf7bb8 | 94 | { "nl-bufsize", required_argument, NULL, 's'}, |
c34b6b57 | 95 | #endif /* HAVE_NETLINK */ |
6baf7bb8 DS |
96 | { "user", required_argument, NULL, 'u'}, |
97 | { "group", required_argument, NULL, 'g'}, | |
98 | { "version", no_argument, NULL, 'v'}, | |
718e3744 | 99 | { 0 } |
100 | }; | |
101 | ||
edd7c245 | 102 | zebra_capabilities_t _caps_p [] = |
103 | { | |
ceacedba | 104 | ZCAP_NET_ADMIN, |
edd7c245 | 105 | ZCAP_SYS_ADMIN, |
ceacedba | 106 | ZCAP_NET_RAW, |
edd7c245 | 107 | }; |
108 | ||
109 | /* zebra privileges to run with */ | |
110 | struct zebra_privs_t zserv_privs = | |
111 | { | |
d81fadfd | 112 | #if defined(QUAGGA_USER) && defined(QUAGGA_GROUP) |
113 | .user = QUAGGA_USER, | |
114 | .group = QUAGGA_GROUP, | |
edd7c245 | 115 | #endif |
116 | #ifdef VTY_GROUP | |
117 | .vty_group = VTY_GROUP, | |
118 | #endif | |
119 | .caps_p = _caps_p, | |
837d16cc | 120 | .cap_num_p = array_size(_caps_p), |
edd7c245 | 121 | .cap_num_i = 0 |
122 | }; | |
123 | ||
718e3744 | 124 | /* Default configuration file path. */ |
718e3744 | 125 | char config_default[] = SYSCONFDIR DEFAULT_CONFIG_FILE; |
126 | ||
127 | /* Process ID saved for use by init system */ | |
fce954f8 | 128 | const char *pid_file = PATH_ZEBRA_PID; |
718e3744 | 129 | |
130 | /* Help information display. */ | |
131 | static void | |
132 | usage (char *progname, int status) | |
133 | { | |
134 | if (status != 0) | |
135 | fprintf (stderr, "Try `%s --help' for more information.\n", progname); | |
136 | else | |
137 | { | |
c34b6b57 | 138 | printf ("Usage : %s [OPTION...]\n\n"\ |
139 | "Daemon which manages kernel routing table management and "\ | |
140 | "redistribution between different routing protocols.\n\n"\ | |
141 | "-b, --batch Runs in batch mode\n"\ | |
142 | "-d, --daemon Runs in daemon mode\n"\ | |
6baf7bb8 | 143 | "-a, --allow_delete Allow other processes to delete Quagga Routes\n" \ |
c34b6b57 | 144 | "-f, --config_file Set configuration file name\n"\ |
145 | "-i, --pid_file Set process identifier file name\n"\ | |
b5114685 | 146 | "-z, --socket Set path of zebra socket\n"\ |
c34b6b57 | 147 | "-k, --keep_kernel Don't delete old routes which installed by "\ |
148 | "zebra.\n"\ | |
876b8be0 | 149 | "-C, --dryrun Check configuration for validity and exit\n"\ |
c34b6b57 | 150 | "-A, --vty_addr Set vty's bind address\n"\ |
151 | "-P, --vty_port Set vty's port number\n"\ | |
152 | "-r, --retain When program terminates, retain added route "\ | |
153 | "by zebra.\n"\ | |
c065230a | 154 | "-u, --user User to run as\n"\ |
19380819 | 155 | "-g, --group Group to run as\n", progname); |
c34b6b57 | 156 | #ifdef HAVE_NETLINK |
157 | printf ("-s, --nl-bufsize Set netlink receive buffer size\n"); | |
158 | #endif /* HAVE_NETLINK */ | |
159 | printf ("-v, --version Print program version\n"\ | |
160 | "-h, --help Display this help and exit\n"\ | |
161 | "\n"\ | |
162 | "Report bugs to %s\n", ZEBRA_BUG_ADDRESS); | |
718e3744 | 163 | } |
164 | ||
165 | exit (status); | |
166 | } | |
6b0655a2 | 167 | |
718e3744 | 168 | /* SIGHUP handler. */ |
a1ac18c4 | 169 | static void |
2d75d052 | 170 | sighup (void) |
718e3744 | 171 | { |
172 | zlog_info ("SIGHUP received"); | |
173 | ||
174 | /* Reload of config file. */ | |
175 | ; | |
176 | } | |
177 | ||
178 | /* SIGINT handler. */ | |
a1ac18c4 | 179 | static void |
2d75d052 | 180 | sigint (void) |
718e3744 | 181 | { |
fe18ee2d DS |
182 | struct zebra_ns *zns; |
183 | ||
887c44a4 | 184 | zlog_notice ("Terminating on signal"); |
718e3744 | 185 | |
186 | if (!retain_mode) | |
187 | rib_close (); | |
ca776988 | 188 | #ifdef HAVE_IRDP |
189 | irdp_finish(); | |
190 | #endif | |
718e3744 | 191 | |
c8ed14dd | 192 | zebra_ptm_finish(); |
fe18ee2d DS |
193 | |
194 | zns = zebra_ns_lookup (NS_DEFAULT); | |
195 | zebra_ns_disable (0, (void **)&zns); | |
718e3744 | 196 | exit (0); |
197 | } | |
198 | ||
199 | /* SIGUSR1 handler. */ | |
a1ac18c4 | 200 | static void |
2d75d052 | 201 | sigusr1 (void) |
718e3744 | 202 | { |
203 | zlog_rotate (NULL); | |
204 | } | |
205 | ||
2d75d052 | 206 | struct quagga_signal_t zebra_signals[] = |
718e3744 | 207 | { |
2d75d052 | 208 | { |
209 | .signal = SIGHUP, | |
210 | .handler = &sighup, | |
211 | }, | |
212 | { | |
213 | .signal = SIGUSR1, | |
214 | .handler = &sigusr1, | |
215 | }, | |
216 | { | |
217 | .signal = SIGINT, | |
8c903fbb | 218 | .handler = &sigint, |
2d75d052 | 219 | }, |
f571dab0 | 220 | { |
221 | .signal = SIGTERM, | |
222 | .handler = &sigint, | |
223 | }, | |
2d75d052 | 224 | }; |
b72ede27 | 225 | |
718e3744 | 226 | /* Main startup routine. */ |
227 | int | |
228 | main (int argc, char **argv) | |
229 | { | |
230 | char *p; | |
231 | char *vty_addr = NULL; | |
4fc4e7ab | 232 | int vty_port = ZEBRA_VTY_PORT; |
876b8be0 | 233 | int dryrun = 0; |
718e3744 | 234 | int batch_mode = 0; |
235 | int daemon_mode = 0; | |
236 | char *config_file = NULL; | |
237 | char *progname; | |
238 | struct thread thread; | |
b5114685 | 239 | char *zserv_path = NULL; |
718e3744 | 240 | |
241 | /* Set umask before anything for security */ | |
242 | umask (0027); | |
243 | ||
244 | /* preserve my name */ | |
245 | progname = ((p = strrchr (argv[0], '/')) ? ++p : argv[0]); | |
246 | ||
7c8ff89e | 247 | zlog_default = openzlog (progname, ZLOG_ZEBRA, 0, |
718e3744 | 248 | LOG_CONS|LOG_NDELAY|LOG_PID, LOG_DAEMON); |
2caa9b39 | 249 | zprivs_init (&zserv_privs); |
c05795b1 SK |
250 | #if defined(HAVE_CUMULUS) |
251 | zlog_set_level (NULL, ZLOG_DEST_SYSLOG, zlog_default->default_lvl); | |
252 | #endif | |
718e3744 | 253 | |
254 | while (1) | |
255 | { | |
256 | int opt; | |
257 | ||
c34b6b57 | 258 | #ifdef HAVE_NETLINK |
6baf7bb8 | 259 | opt = getopt_long (argc, argv, "bdakf:i:z:hA:P:ru:g:vs:C", longopts, 0); |
c34b6b57 | 260 | #else |
6baf7bb8 | 261 | opt = getopt_long (argc, argv, "bdakf:i:z:hA:P:ru:g:vC", longopts, 0); |
c34b6b57 | 262 | #endif /* HAVE_NETLINK */ |
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; | |
288 | case 'A': | |
289 | vty_addr = optarg; | |
290 | break; | |
291 | case 'i': | |
292 | pid_file = optarg; | |
293 | break; | |
b5114685 VT |
294 | case 'z': |
295 | zserv_path = optarg; | |
296 | break; | |
718e3744 | 297 | case 'P': |
4fc4e7ab | 298 | /* Deal with atoi() returning 0 on failure, and zebra not |
299 | listening on zebra port... */ | |
300 | if (strcmp(optarg, "0") == 0) | |
301 | { | |
302 | vty_port = 0; | |
303 | break; | |
304 | } | |
718e3744 | 305 | vty_port = atoi (optarg); |
0d6b2ee2 PJ |
306 | if (vty_port <= 0 || vty_port > 0xffff) |
307 | vty_port = ZEBRA_VTY_PORT; | |
718e3744 | 308 | break; |
309 | case 'r': | |
310 | retain_mode = 1; | |
311 | break; | |
c34b6b57 | 312 | #ifdef HAVE_NETLINK |
313 | case 's': | |
314 | nl_rcvbufsize = atoi (optarg); | |
315 | break; | |
316 | #endif /* HAVE_NETLINK */ | |
c065230a | 317 | case 'u': |
318 | zserv_privs.user = optarg; | |
319 | break; | |
320 | case 'g': | |
321 | zserv_privs.group = optarg; | |
322 | break; | |
718e3744 | 323 | case 'v': |
324 | print_version (progname); | |
325 | exit (0); | |
326 | break; | |
327 | case 'h': | |
328 | usage (progname, 0); | |
329 | break; | |
330 | default: | |
331 | usage (progname, 1); | |
332 | break; | |
333 | } | |
334 | } | |
335 | ||
336 | /* Make master thread emulator. */ | |
b21b19c5 | 337 | zebrad.master = thread_master_create (); |
718e3744 | 338 | |
339 | /* Vty related initialize. */ | |
837d16cc | 340 | signal_init (zebrad.master, array_size(zebra_signals), zebra_signals); |
718e3744 | 341 | cmd_init (1); |
b21b19c5 | 342 | vty_init (zebrad.master); |
718e3744 | 343 | memory_init (); |
344 | ||
345 | /* Zebra related initialize. */ | |
346 | zebra_init (); | |
347 | rib_init (); | |
348 | zebra_if_init (); | |
349 | zebra_debug_init (); | |
c6ffe645 | 350 | router_id_cmd_init (); |
718e3744 | 351 | zebra_vty_init (); |
352 | access_list_init (); | |
7514fb77 | 353 | prefix_list_init (); |
8da4e946 | 354 | #if defined (HAVE_RTADV) |
cd80d74f | 355 | rtadv_cmd_init (); |
36735ed9 | 356 | #endif |
ca776988 | 357 | #ifdef HAVE_IRDP |
358 | irdp_init(); | |
359 | #endif | |
244c1cdc DS |
360 | /* PTM socket */ |
361 | #ifdef ZEBRA_PTM_SUPPORT | |
362 | zebra_ptm_init(); | |
363 | #endif | |
718e3744 | 364 | |
365 | /* For debug purpose. */ | |
366 | /* SET_FLAG (zebra_debug_event, ZEBRA_DEBUG_EVENT); */ | |
367 | ||
fe18ee2d DS |
368 | /* Initialize NS( and implicitly the VRF module), and make kernel routing socket. */ |
369 | zebra_ns_init (); | |
718e3744 | 370 | |
718e3744 | 371 | #ifdef HAVE_SNMP |
372 | zebra_snmp_init (); | |
373 | #endif /* HAVE_SNMP */ | |
374 | ||
5adc2528 AS |
375 | #ifdef HAVE_FPM |
376 | zfpm_init (zebrad.master, 1, 0); | |
377 | #else | |
378 | zfpm_init (zebrad.master, 0, 0); | |
379 | #endif | |
380 | ||
91b7351d DO |
381 | /* Process the configuration file. Among other configuration |
382 | * directives we can meet those installing static routes. Such | |
383 | * requests will not be executed immediately, but queued in | |
384 | * zebra->ribq structure until we enter the main execution loop. | |
385 | * The notifications from kernel will show originating PID equal | |
386 | * to that after daemon() completes (if ever called). | |
387 | */ | |
320ec10a | 388 | vty_read_config (config_file, config_default); |
718e3744 | 389 | |
876b8be0 PJ |
390 | /* Don't start execution if we are in dry-run mode */ |
391 | if (dryrun) | |
392 | return(0); | |
393 | ||
718e3744 | 394 | /* Clean up rib. */ |
7a4bb9c5 | 395 | /* rib_weed_tables (); */ |
718e3744 | 396 | |
397 | /* Exit when zebra is working in batch mode. */ | |
398 | if (batch_mode) | |
399 | exit (0); | |
400 | ||
718e3744 | 401 | /* Daemonize. */ |
065de903 SH |
402 | if (daemon_mode && daemon (0, 0) < 0) |
403 | { | |
404 | zlog_err("Zebra daemon failed: %s", strerror(errno)); | |
405 | exit (1); | |
406 | } | |
718e3744 | 407 | |
408 | /* Output pid of zebra. */ | |
409 | pid_output (pid_file); | |
410 | ||
91b7351d DO |
411 | /* After we have successfully acquired the pidfile, we can be sure |
412 | * about being the only copy of zebra process, which is submitting | |
413 | * changes to the FIB. | |
414 | * Clean up zebra-originated routes. The requests will be sent to OS | |
415 | * immediately, so originating PID in notifications from kernel | |
416 | * will be equal to the current getpid(). To know about such routes, | |
417 | * we have to have route_read() called before. | |
418 | */ | |
419 | if (! keep_kernel_mode) | |
420 | rib_sweep_route (); | |
421 | ||
718e3744 | 422 | /* Needed for BSD routing socket. */ |
423 | pid = getpid (); | |
424 | ||
97be79f9 | 425 | /* This must be done only after locking pidfile (bug #403). */ |
b5114685 | 426 | zebra_zserv_socket_init (zserv_path); |
97be79f9 | 427 | |
718e3744 | 428 | /* Make vty server socket. */ |
4fc4e7ab | 429 | vty_serv_sock (vty_addr, vty_port, ZEBRA_VTYSH_PATH); |
718e3744 | 430 | |
887c44a4 | 431 | /* Print banner. */ |
432 | zlog_notice ("Zebra %s starting: vty@%d", QUAGGA_VERSION, vty_port); | |
433 | ||
b21b19c5 | 434 | while (thread_fetch (zebrad.master, &thread)) |
718e3744 | 435 | thread_call (&thread); |
436 | ||
437 | /* Not reached... */ | |
e8e1946e | 438 | return 0; |
718e3744 | 439 | } |