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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" |
718e3744 | 35 | |
36 | #include "zebra/rib.h" | |
37 | #include "zebra/zserv.h" | |
38 | #include "zebra/debug.h" | |
18a6dce6 | 39 | #include "zebra/router-id.h" |
ca776988 | 40 | #include "zebra/irdp.h" |
a1ac18c4 | 41 | #include "zebra/rtadv.h" |
5adc2528 | 42 | #include "zebra/zebra_fpm.h" |
718e3744 | 43 | |
b21b19c5 | 44 | /* Zebra instance */ |
45 | struct zebra_t zebrad = | |
46 | { | |
47 | .rtm_table_default = 0, | |
48 | }; | |
718e3744 | 49 | |
50 | /* process id. */ | |
718e3744 | 51 | pid_t pid; |
52 | ||
87efd646 | 53 | /* Pacify zclient.o in libzebra, which expects this variable. */ |
54 | struct thread_master *master; | |
55 | ||
718e3744 | 56 | /* Route retain mode flag. */ |
57 | int retain_mode = 0; | |
58 | ||
59 | /* Don't delete kernel route. */ | |
60 | int keep_kernel_mode = 0; | |
61 | ||
c34b6b57 | 62 | #ifdef HAVE_NETLINK |
63 | /* Receive buffer size for netlink socket */ | |
64 | u_int32_t nl_rcvbufsize = 0; | |
65 | #endif /* HAVE_NETLINK */ | |
66 | ||
718e3744 | 67 | /* Command line options. */ |
68 | struct option longopts[] = | |
69 | { | |
70 | { "batch", no_argument, NULL, 'b'}, | |
71 | { "daemon", no_argument, NULL, 'd'}, | |
72 | { "keep_kernel", no_argument, NULL, 'k'}, | |
718e3744 | 73 | { "config_file", required_argument, NULL, 'f'}, |
74 | { "pid_file", required_argument, NULL, 'i'}, | |
b5114685 | 75 | { "socket", required_argument, NULL, 'z'}, |
718e3744 | 76 | { "help", no_argument, NULL, 'h'}, |
77 | { "vty_addr", required_argument, NULL, 'A'}, | |
78 | { "vty_port", required_argument, NULL, 'P'}, | |
79 | { "retain", no_argument, NULL, 'r'}, | |
876b8be0 | 80 | { "dryrun", no_argument, NULL, 'C'}, |
c34b6b57 | 81 | #ifdef HAVE_NETLINK |
583d800c | 82 | { "nl-bufsize", required_argument, NULL, 's'}, |
c34b6b57 | 83 | #endif /* HAVE_NETLINK */ |
edd7c245 | 84 | { "user", required_argument, NULL, 'u'}, |
c065230a | 85 | { "group", required_argument, NULL, 'g'}, |
718e3744 | 86 | { "version", no_argument, NULL, 'v'}, |
87 | { 0 } | |
88 | }; | |
89 | ||
edd7c245 | 90 | zebra_capabilities_t _caps_p [] = |
91 | { | |
ceacedba | 92 | ZCAP_NET_ADMIN, |
edd7c245 | 93 | ZCAP_SYS_ADMIN, |
ceacedba | 94 | ZCAP_NET_RAW, |
edd7c245 | 95 | }; |
96 | ||
97 | /* zebra privileges to run with */ | |
98 | struct zebra_privs_t zserv_privs = | |
99 | { | |
d81fadfd | 100 | #if defined(QUAGGA_USER) && defined(QUAGGA_GROUP) |
101 | .user = QUAGGA_USER, | |
102 | .group = QUAGGA_GROUP, | |
edd7c245 | 103 | #endif |
104 | #ifdef VTY_GROUP | |
105 | .vty_group = VTY_GROUP, | |
106 | #endif | |
107 | .caps_p = _caps_p, | |
837d16cc | 108 | .cap_num_p = array_size(_caps_p), |
edd7c245 | 109 | .cap_num_i = 0 |
110 | }; | |
111 | ||
718e3744 | 112 | /* Default configuration file path. */ |
718e3744 | 113 | char config_default[] = SYSCONFDIR DEFAULT_CONFIG_FILE; |
114 | ||
115 | /* Process ID saved for use by init system */ | |
fce954f8 | 116 | const char *pid_file = PATH_ZEBRA_PID; |
718e3744 | 117 | |
118 | /* Help information display. */ | |
119 | static void | |
120 | usage (char *progname, int status) | |
121 | { | |
122 | if (status != 0) | |
123 | fprintf (stderr, "Try `%s --help' for more information.\n", progname); | |
124 | else | |
125 | { | |
c34b6b57 | 126 | printf ("Usage : %s [OPTION...]\n\n"\ |
127 | "Daemon which manages kernel routing table management and "\ | |
128 | "redistribution between different routing protocols.\n\n"\ | |
129 | "-b, --batch Runs in batch mode\n"\ | |
130 | "-d, --daemon Runs in daemon mode\n"\ | |
131 | "-f, --config_file Set configuration file name\n"\ | |
132 | "-i, --pid_file Set process identifier file name\n"\ | |
b5114685 | 133 | "-z, --socket Set path of zebra socket\n"\ |
c34b6b57 | 134 | "-k, --keep_kernel Don't delete old routes which installed by "\ |
135 | "zebra.\n"\ | |
876b8be0 | 136 | "-C, --dryrun Check configuration for validity and exit\n"\ |
c34b6b57 | 137 | "-A, --vty_addr Set vty's bind address\n"\ |
138 | "-P, --vty_port Set vty's port number\n"\ | |
139 | "-r, --retain When program terminates, retain added route "\ | |
140 | "by zebra.\n"\ | |
c065230a | 141 | "-u, --user User to run as\n"\ |
142 | "-g, --group Group to run as\n", progname); | |
c34b6b57 | 143 | #ifdef HAVE_NETLINK |
144 | printf ("-s, --nl-bufsize Set netlink receive buffer size\n"); | |
145 | #endif /* HAVE_NETLINK */ | |
146 | printf ("-v, --version Print program version\n"\ | |
147 | "-h, --help Display this help and exit\n"\ | |
148 | "\n"\ | |
149 | "Report bugs to %s\n", ZEBRA_BUG_ADDRESS); | |
718e3744 | 150 | } |
151 | ||
152 | exit (status); | |
153 | } | |
154 | \f | |
155 | /* SIGHUP handler. */ | |
a1ac18c4 | 156 | static void |
2d75d052 | 157 | sighup (void) |
718e3744 | 158 | { |
159 | zlog_info ("SIGHUP received"); | |
160 | ||
161 | /* Reload of config file. */ | |
162 | ; | |
163 | } | |
164 | ||
165 | /* SIGINT handler. */ | |
a1ac18c4 | 166 | static void |
2d75d052 | 167 | sigint (void) |
718e3744 | 168 | { |
887c44a4 | 169 | zlog_notice ("Terminating on signal"); |
718e3744 | 170 | |
171 | if (!retain_mode) | |
172 | rib_close (); | |
ca776988 | 173 | #ifdef HAVE_IRDP |
174 | irdp_finish(); | |
175 | #endif | |
718e3744 | 176 | |
177 | exit (0); | |
178 | } | |
179 | ||
180 | /* SIGUSR1 handler. */ | |
a1ac18c4 | 181 | static void |
2d75d052 | 182 | sigusr1 (void) |
718e3744 | 183 | { |
184 | zlog_rotate (NULL); | |
185 | } | |
186 | ||
2d75d052 | 187 | struct quagga_signal_t zebra_signals[] = |
718e3744 | 188 | { |
2d75d052 | 189 | { |
190 | .signal = SIGHUP, | |
191 | .handler = &sighup, | |
192 | }, | |
193 | { | |
194 | .signal = SIGUSR1, | |
195 | .handler = &sigusr1, | |
196 | }, | |
197 | { | |
198 | .signal = SIGINT, | |
8c903fbb | 199 | .handler = &sigint, |
2d75d052 | 200 | }, |
f571dab0 | 201 | { |
202 | .signal = SIGTERM, | |
203 | .handler = &sigint, | |
204 | }, | |
2d75d052 | 205 | }; |
718e3744 | 206 | \f |
207 | /* Main startup routine. */ | |
208 | int | |
209 | main (int argc, char **argv) | |
210 | { | |
211 | char *p; | |
212 | char *vty_addr = NULL; | |
4fc4e7ab | 213 | int vty_port = ZEBRA_VTY_PORT; |
876b8be0 | 214 | int dryrun = 0; |
718e3744 | 215 | int batch_mode = 0; |
216 | int daemon_mode = 0; | |
217 | char *config_file = NULL; | |
218 | char *progname; | |
219 | struct thread thread; | |
b5114685 | 220 | char *zserv_path = NULL; |
718e3744 | 221 | |
222 | /* Set umask before anything for security */ | |
223 | umask (0027); | |
224 | ||
225 | /* preserve my name */ | |
226 | progname = ((p = strrchr (argv[0], '/')) ? ++p : argv[0]); | |
227 | ||
274a4a44 | 228 | zlog_default = openzlog (progname, ZLOG_ZEBRA, |
718e3744 | 229 | LOG_CONS|LOG_NDELAY|LOG_PID, LOG_DAEMON); |
230 | ||
231 | while (1) | |
232 | { | |
233 | int opt; | |
234 | ||
c34b6b57 | 235 | #ifdef HAVE_NETLINK |
b5114685 | 236 | opt = getopt_long (argc, argv, "bdkf:i:z:hA:P:ru:g:vs:C", longopts, 0); |
c34b6b57 | 237 | #else |
b5114685 | 238 | opt = getopt_long (argc, argv, "bdkf:i:z:hA:P:ru:g:vC", longopts, 0); |
c34b6b57 | 239 | #endif /* HAVE_NETLINK */ |
718e3744 | 240 | |
241 | if (opt == EOF) | |
242 | break; | |
243 | ||
244 | switch (opt) | |
245 | { | |
246 | case 0: | |
247 | break; | |
248 | case 'b': | |
249 | batch_mode = 1; | |
250 | case 'd': | |
251 | daemon_mode = 1; | |
252 | break; | |
253 | case 'k': | |
254 | keep_kernel_mode = 1; | |
255 | break; | |
876b8be0 PJ |
256 | case 'C': |
257 | dryrun = 1; | |
258 | break; | |
718e3744 | 259 | case 'f': |
260 | config_file = optarg; | |
261 | break; | |
262 | case 'A': | |
263 | vty_addr = optarg; | |
264 | break; | |
265 | case 'i': | |
266 | pid_file = optarg; | |
267 | break; | |
b5114685 VT |
268 | case 'z': |
269 | zserv_path = optarg; | |
270 | break; | |
718e3744 | 271 | case 'P': |
4fc4e7ab | 272 | /* Deal with atoi() returning 0 on failure, and zebra not |
273 | listening on zebra port... */ | |
274 | if (strcmp(optarg, "0") == 0) | |
275 | { | |
276 | vty_port = 0; | |
277 | break; | |
278 | } | |
718e3744 | 279 | vty_port = atoi (optarg); |
0d6b2ee2 PJ |
280 | if (vty_port <= 0 || vty_port > 0xffff) |
281 | vty_port = ZEBRA_VTY_PORT; | |
718e3744 | 282 | break; |
283 | case 'r': | |
284 | retain_mode = 1; | |
285 | break; | |
c34b6b57 | 286 | #ifdef HAVE_NETLINK |
287 | case 's': | |
288 | nl_rcvbufsize = atoi (optarg); | |
289 | break; | |
290 | #endif /* HAVE_NETLINK */ | |
c065230a | 291 | case 'u': |
292 | zserv_privs.user = optarg; | |
293 | break; | |
294 | case 'g': | |
295 | zserv_privs.group = optarg; | |
296 | break; | |
718e3744 | 297 | case 'v': |
298 | print_version (progname); | |
299 | exit (0); | |
300 | break; | |
301 | case 'h': | |
302 | usage (progname, 0); | |
303 | break; | |
304 | default: | |
305 | usage (progname, 1); | |
306 | break; | |
307 | } | |
308 | } | |
309 | ||
310 | /* Make master thread emulator. */ | |
b21b19c5 | 311 | zebrad.master = thread_master_create (); |
718e3744 | 312 | |
edd7c245 | 313 | /* privs initialise */ |
314 | zprivs_init (&zserv_privs); | |
315 | ||
718e3744 | 316 | /* Vty related initialize. */ |
837d16cc | 317 | signal_init (zebrad.master, array_size(zebra_signals), zebra_signals); |
718e3744 | 318 | cmd_init (1); |
b21b19c5 | 319 | vty_init (zebrad.master); |
718e3744 | 320 | memory_init (); |
321 | ||
322 | /* Zebra related initialize. */ | |
323 | zebra_init (); | |
324 | rib_init (); | |
325 | zebra_if_init (); | |
326 | zebra_debug_init (); | |
18a6dce6 | 327 | router_id_init(); |
718e3744 | 328 | zebra_vty_init (); |
329 | access_list_init (); | |
7514fb77 | 330 | prefix_list_init (); |
36735ed9 | 331 | #ifdef RTADV |
718e3744 | 332 | rtadv_init (); |
36735ed9 | 333 | #endif |
ca776988 | 334 | #ifdef HAVE_IRDP |
335 | irdp_init(); | |
336 | #endif | |
718e3744 | 337 | |
338 | /* For debug purpose. */ | |
339 | /* SET_FLAG (zebra_debug_event, ZEBRA_DEBUG_EVENT); */ | |
340 | ||
341 | /* Make kernel routing socket. */ | |
342 | kernel_init (); | |
343 | interface_list (); | |
344 | route_read (); | |
345 | ||
718e3744 | 346 | #ifdef HAVE_SNMP |
347 | zebra_snmp_init (); | |
348 | #endif /* HAVE_SNMP */ | |
349 | ||
5adc2528 AS |
350 | #ifdef HAVE_FPM |
351 | zfpm_init (zebrad.master, 1, 0); | |
352 | #else | |
353 | zfpm_init (zebrad.master, 0, 0); | |
354 | #endif | |
355 | ||
91b7351d DO |
356 | /* Process the configuration file. Among other configuration |
357 | * directives we can meet those installing static routes. Such | |
358 | * requests will not be executed immediately, but queued in | |
359 | * zebra->ribq structure until we enter the main execution loop. | |
360 | * The notifications from kernel will show originating PID equal | |
361 | * to that after daemon() completes (if ever called). | |
362 | */ | |
320ec10a | 363 | vty_read_config (config_file, config_default); |
718e3744 | 364 | |
876b8be0 PJ |
365 | /* Don't start execution if we are in dry-run mode */ |
366 | if (dryrun) | |
367 | return(0); | |
368 | ||
718e3744 | 369 | /* Clean up rib. */ |
370 | rib_weed_tables (); | |
371 | ||
372 | /* Exit when zebra is working in batch mode. */ | |
373 | if (batch_mode) | |
374 | exit (0); | |
375 | ||
718e3744 | 376 | /* Daemonize. */ |
065de903 SH |
377 | if (daemon_mode && daemon (0, 0) < 0) |
378 | { | |
379 | zlog_err("Zebra daemon failed: %s", strerror(errno)); | |
380 | exit (1); | |
381 | } | |
718e3744 | 382 | |
383 | /* Output pid of zebra. */ | |
384 | pid_output (pid_file); | |
385 | ||
91b7351d DO |
386 | /* After we have successfully acquired the pidfile, we can be sure |
387 | * about being the only copy of zebra process, which is submitting | |
388 | * changes to the FIB. | |
389 | * Clean up zebra-originated routes. The requests will be sent to OS | |
390 | * immediately, so originating PID in notifications from kernel | |
391 | * will be equal to the current getpid(). To know about such routes, | |
392 | * we have to have route_read() called before. | |
393 | */ | |
394 | if (! keep_kernel_mode) | |
395 | rib_sweep_route (); | |
396 | ||
718e3744 | 397 | /* Needed for BSD routing socket. */ |
398 | pid = getpid (); | |
399 | ||
97be79f9 | 400 | /* This must be done only after locking pidfile (bug #403). */ |
b5114685 | 401 | zebra_zserv_socket_init (zserv_path); |
97be79f9 | 402 | |
718e3744 | 403 | /* Make vty server socket. */ |
4fc4e7ab | 404 | vty_serv_sock (vty_addr, vty_port, ZEBRA_VTYSH_PATH); |
718e3744 | 405 | |
887c44a4 | 406 | /* Print banner. */ |
407 | zlog_notice ("Zebra %s starting: vty@%d", QUAGGA_VERSION, vty_port); | |
408 | ||
b21b19c5 | 409 | while (thread_fetch (zebrad.master, &thread)) |
718e3744 | 410 | thread_call (&thread); |
411 | ||
412 | /* Not reached... */ | |
e8e1946e | 413 | return 0; |
718e3744 | 414 | } |