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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" |
718e3744 | 42 | |
b21b19c5 | 43 | /* Zebra instance */ |
44 | struct zebra_t zebrad = | |
45 | { | |
46 | .rtm_table_default = 0, | |
47 | }; | |
718e3744 | 48 | |
49 | /* process id. */ | |
718e3744 | 50 | pid_t pid; |
51 | ||
87efd646 | 52 | /* Pacify zclient.o in libzebra, which expects this variable. */ |
53 | struct thread_master *master; | |
54 | ||
718e3744 | 55 | /* Route retain mode flag. */ |
56 | int retain_mode = 0; | |
57 | ||
58 | /* Don't delete kernel route. */ | |
59 | int keep_kernel_mode = 0; | |
60 | ||
c34b6b57 | 61 | #ifdef HAVE_NETLINK |
62 | /* Receive buffer size for netlink socket */ | |
63 | u_int32_t nl_rcvbufsize = 0; | |
64 | #endif /* HAVE_NETLINK */ | |
65 | ||
718e3744 | 66 | /* Command line options. */ |
67 | struct option longopts[] = | |
68 | { | |
69 | { "batch", no_argument, NULL, 'b'}, | |
70 | { "daemon", no_argument, NULL, 'd'}, | |
71 | { "keep_kernel", no_argument, NULL, 'k'}, | |
718e3744 | 72 | { "config_file", required_argument, NULL, 'f'}, |
73 | { "pid_file", required_argument, NULL, 'i'}, | |
74 | { "help", no_argument, NULL, 'h'}, | |
75 | { "vty_addr", required_argument, NULL, 'A'}, | |
76 | { "vty_port", required_argument, NULL, 'P'}, | |
77 | { "retain", no_argument, NULL, 'r'}, | |
876b8be0 | 78 | { "dryrun", no_argument, NULL, 'C'}, |
c34b6b57 | 79 | #ifdef HAVE_NETLINK |
583d800c | 80 | { "nl-bufsize", required_argument, NULL, 's'}, |
c34b6b57 | 81 | #endif /* HAVE_NETLINK */ |
edd7c245 | 82 | { "user", required_argument, NULL, 'u'}, |
c065230a | 83 | { "group", required_argument, NULL, 'g'}, |
718e3744 | 84 | { "version", no_argument, NULL, 'v'}, |
85 | { 0 } | |
86 | }; | |
87 | ||
edd7c245 | 88 | zebra_capabilities_t _caps_p [] = |
89 | { | |
ceacedba | 90 | ZCAP_NET_ADMIN, |
edd7c245 | 91 | ZCAP_SYS_ADMIN, |
ceacedba | 92 | ZCAP_NET_RAW, |
edd7c245 | 93 | }; |
94 | ||
95 | /* zebra privileges to run with */ | |
96 | struct zebra_privs_t zserv_privs = | |
97 | { | |
d81fadfd | 98 | #if defined(QUAGGA_USER) && defined(QUAGGA_GROUP) |
99 | .user = QUAGGA_USER, | |
100 | .group = QUAGGA_GROUP, | |
edd7c245 | 101 | #endif |
102 | #ifdef VTY_GROUP | |
103 | .vty_group = VTY_GROUP, | |
104 | #endif | |
105 | .caps_p = _caps_p, | |
106 | .cap_num_p = sizeof(_caps_p)/sizeof(_caps_p[0]), | |
107 | .cap_num_i = 0 | |
108 | }; | |
109 | ||
718e3744 | 110 | /* Default configuration file path. */ |
718e3744 | 111 | char config_default[] = SYSCONFDIR DEFAULT_CONFIG_FILE; |
112 | ||
113 | /* Process ID saved for use by init system */ | |
fce954f8 | 114 | const char *pid_file = PATH_ZEBRA_PID; |
718e3744 | 115 | |
116 | /* Help information display. */ | |
117 | static void | |
118 | usage (char *progname, int status) | |
119 | { | |
120 | if (status != 0) | |
121 | fprintf (stderr, "Try `%s --help' for more information.\n", progname); | |
122 | else | |
123 | { | |
c34b6b57 | 124 | printf ("Usage : %s [OPTION...]\n\n"\ |
125 | "Daemon which manages kernel routing table management and "\ | |
126 | "redistribution between different routing protocols.\n\n"\ | |
127 | "-b, --batch Runs in batch mode\n"\ | |
128 | "-d, --daemon Runs in daemon mode\n"\ | |
129 | "-f, --config_file Set configuration file name\n"\ | |
130 | "-i, --pid_file Set process identifier file name\n"\ | |
131 | "-k, --keep_kernel Don't delete old routes which installed by "\ | |
132 | "zebra.\n"\ | |
876b8be0 | 133 | "-C, --dryrun Check configuration for validity and exit\n"\ |
c34b6b57 | 134 | "-A, --vty_addr Set vty's bind address\n"\ |
135 | "-P, --vty_port Set vty's port number\n"\ | |
136 | "-r, --retain When program terminates, retain added route "\ | |
137 | "by zebra.\n"\ | |
c065230a | 138 | "-u, --user User to run as\n"\ |
139 | "-g, --group Group to run as\n", progname); | |
c34b6b57 | 140 | #ifdef HAVE_NETLINK |
141 | printf ("-s, --nl-bufsize Set netlink receive buffer size\n"); | |
142 | #endif /* HAVE_NETLINK */ | |
143 | printf ("-v, --version Print program version\n"\ | |
144 | "-h, --help Display this help and exit\n"\ | |
145 | "\n"\ | |
146 | "Report bugs to %s\n", ZEBRA_BUG_ADDRESS); | |
718e3744 | 147 | } |
148 | ||
149 | exit (status); | |
150 | } | |
151 | \f | |
152 | /* SIGHUP handler. */ | |
a1ac18c4 | 153 | static void |
2d75d052 | 154 | sighup (void) |
718e3744 | 155 | { |
156 | zlog_info ("SIGHUP received"); | |
157 | ||
158 | /* Reload of config file. */ | |
159 | ; | |
160 | } | |
161 | ||
162 | /* SIGINT handler. */ | |
a1ac18c4 | 163 | static void |
2d75d052 | 164 | sigint (void) |
718e3744 | 165 | { |
887c44a4 | 166 | zlog_notice ("Terminating on signal"); |
718e3744 | 167 | |
168 | if (!retain_mode) | |
169 | rib_close (); | |
ca776988 | 170 | #ifdef HAVE_IRDP |
171 | irdp_finish(); | |
172 | #endif | |
718e3744 | 173 | |
174 | exit (0); | |
175 | } | |
176 | ||
177 | /* SIGUSR1 handler. */ | |
a1ac18c4 | 178 | static void |
2d75d052 | 179 | sigusr1 (void) |
718e3744 | 180 | { |
181 | zlog_rotate (NULL); | |
182 | } | |
183 | ||
2d75d052 | 184 | struct quagga_signal_t zebra_signals[] = |
718e3744 | 185 | { |
2d75d052 | 186 | { |
187 | .signal = SIGHUP, | |
188 | .handler = &sighup, | |
189 | }, | |
190 | { | |
191 | .signal = SIGUSR1, | |
192 | .handler = &sigusr1, | |
193 | }, | |
194 | { | |
195 | .signal = SIGINT, | |
8c903fbb | 196 | .handler = &sigint, |
2d75d052 | 197 | }, |
f571dab0 | 198 | { |
199 | .signal = SIGTERM, | |
200 | .handler = &sigint, | |
201 | }, | |
2d75d052 | 202 | }; |
718e3744 | 203 | \f |
204 | /* Main startup routine. */ | |
205 | int | |
206 | main (int argc, char **argv) | |
207 | { | |
208 | char *p; | |
209 | char *vty_addr = NULL; | |
4fc4e7ab | 210 | int vty_port = ZEBRA_VTY_PORT; |
876b8be0 | 211 | int dryrun = 0; |
718e3744 | 212 | int batch_mode = 0; |
213 | int daemon_mode = 0; | |
214 | char *config_file = NULL; | |
215 | char *progname; | |
216 | struct thread thread; | |
718e3744 | 217 | |
218 | /* Set umask before anything for security */ | |
219 | umask (0027); | |
220 | ||
221 | /* preserve my name */ | |
222 | progname = ((p = strrchr (argv[0], '/')) ? ++p : argv[0]); | |
223 | ||
274a4a44 | 224 | zlog_default = openzlog (progname, ZLOG_ZEBRA, |
718e3744 | 225 | LOG_CONS|LOG_NDELAY|LOG_PID, LOG_DAEMON); |
226 | ||
227 | while (1) | |
228 | { | |
229 | int opt; | |
230 | ||
c34b6b57 | 231 | #ifdef HAVE_NETLINK |
c77cffdd | 232 | opt = getopt_long (argc, argv, "bdkf:i:hA:P:ru:g:vs:C", longopts, 0); |
c34b6b57 | 233 | #else |
c77cffdd | 234 | opt = getopt_long (argc, argv, "bdkf:i:hA:P:ru:g:vC", longopts, 0); |
c34b6b57 | 235 | #endif /* HAVE_NETLINK */ |
718e3744 | 236 | |
237 | if (opt == EOF) | |
238 | break; | |
239 | ||
240 | switch (opt) | |
241 | { | |
242 | case 0: | |
243 | break; | |
244 | case 'b': | |
245 | batch_mode = 1; | |
246 | case 'd': | |
247 | daemon_mode = 1; | |
248 | break; | |
249 | case 'k': | |
250 | keep_kernel_mode = 1; | |
251 | break; | |
876b8be0 PJ |
252 | case 'C': |
253 | dryrun = 1; | |
254 | break; | |
718e3744 | 255 | case 'f': |
256 | config_file = optarg; | |
257 | break; | |
258 | case 'A': | |
259 | vty_addr = optarg; | |
260 | break; | |
261 | case 'i': | |
262 | pid_file = optarg; | |
263 | break; | |
264 | case 'P': | |
4fc4e7ab | 265 | /* Deal with atoi() returning 0 on failure, and zebra not |
266 | listening on zebra port... */ | |
267 | if (strcmp(optarg, "0") == 0) | |
268 | { | |
269 | vty_port = 0; | |
270 | break; | |
271 | } | |
718e3744 | 272 | vty_port = atoi (optarg); |
0d6b2ee2 PJ |
273 | if (vty_port <= 0 || vty_port > 0xffff) |
274 | vty_port = ZEBRA_VTY_PORT; | |
718e3744 | 275 | break; |
276 | case 'r': | |
277 | retain_mode = 1; | |
278 | break; | |
c34b6b57 | 279 | #ifdef HAVE_NETLINK |
280 | case 's': | |
281 | nl_rcvbufsize = atoi (optarg); | |
282 | break; | |
283 | #endif /* HAVE_NETLINK */ | |
c065230a | 284 | case 'u': |
285 | zserv_privs.user = optarg; | |
286 | break; | |
287 | case 'g': | |
288 | zserv_privs.group = optarg; | |
289 | break; | |
718e3744 | 290 | case 'v': |
291 | print_version (progname); | |
292 | exit (0); | |
293 | break; | |
294 | case 'h': | |
295 | usage (progname, 0); | |
296 | break; | |
297 | default: | |
298 | usage (progname, 1); | |
299 | break; | |
300 | } | |
301 | } | |
302 | ||
303 | /* Make master thread emulator. */ | |
b21b19c5 | 304 | zebrad.master = thread_master_create (); |
718e3744 | 305 | |
edd7c245 | 306 | /* privs initialise */ |
307 | zprivs_init (&zserv_privs); | |
308 | ||
718e3744 | 309 | /* Vty related initialize. */ |
2d75d052 | 310 | signal_init (zebrad.master, Q_SIGC(zebra_signals), zebra_signals); |
718e3744 | 311 | cmd_init (1); |
b21b19c5 | 312 | vty_init (zebrad.master); |
718e3744 | 313 | memory_init (); |
314 | ||
315 | /* Zebra related initialize. */ | |
316 | zebra_init (); | |
317 | rib_init (); | |
318 | zebra_if_init (); | |
319 | zebra_debug_init (); | |
18a6dce6 | 320 | router_id_init(); |
718e3744 | 321 | zebra_vty_init (); |
322 | access_list_init (); | |
7514fb77 | 323 | prefix_list_init (); |
718e3744 | 324 | rtadv_init (); |
ca776988 | 325 | #ifdef HAVE_IRDP |
326 | irdp_init(); | |
327 | #endif | |
718e3744 | 328 | |
329 | /* For debug purpose. */ | |
330 | /* SET_FLAG (zebra_debug_event, ZEBRA_DEBUG_EVENT); */ | |
331 | ||
332 | /* Make kernel routing socket. */ | |
333 | kernel_init (); | |
334 | interface_list (); | |
335 | route_read (); | |
336 | ||
337 | /* Sort VTY commands. */ | |
338 | sort_node (); | |
339 | ||
340 | #ifdef HAVE_SNMP | |
341 | zebra_snmp_init (); | |
342 | #endif /* HAVE_SNMP */ | |
343 | ||
91b7351d DO |
344 | /* Process the configuration file. Among other configuration |
345 | * directives we can meet those installing static routes. Such | |
346 | * requests will not be executed immediately, but queued in | |
347 | * zebra->ribq structure until we enter the main execution loop. | |
348 | * The notifications from kernel will show originating PID equal | |
349 | * to that after daemon() completes (if ever called). | |
350 | */ | |
320ec10a | 351 | vty_read_config (config_file, config_default); |
718e3744 | 352 | |
876b8be0 PJ |
353 | /* Don't start execution if we are in dry-run mode */ |
354 | if (dryrun) | |
355 | return(0); | |
356 | ||
718e3744 | 357 | /* Clean up rib. */ |
358 | rib_weed_tables (); | |
359 | ||
360 | /* Exit when zebra is working in batch mode. */ | |
361 | if (batch_mode) | |
362 | exit (0); | |
363 | ||
718e3744 | 364 | /* Daemonize. */ |
365 | if (daemon_mode) | |
366 | daemon (0, 0); | |
367 | ||
368 | /* Output pid of zebra. */ | |
369 | pid_output (pid_file); | |
370 | ||
91b7351d DO |
371 | /* After we have successfully acquired the pidfile, we can be sure |
372 | * about being the only copy of zebra process, which is submitting | |
373 | * changes to the FIB. | |
374 | * Clean up zebra-originated routes. The requests will be sent to OS | |
375 | * immediately, so originating PID in notifications from kernel | |
376 | * will be equal to the current getpid(). To know about such routes, | |
377 | * we have to have route_read() called before. | |
378 | */ | |
379 | if (! keep_kernel_mode) | |
380 | rib_sweep_route (); | |
381 | ||
718e3744 | 382 | /* Needed for BSD routing socket. */ |
383 | pid = getpid (); | |
384 | ||
385 | /* Make vty server socket. */ | |
4fc4e7ab | 386 | vty_serv_sock (vty_addr, vty_port, ZEBRA_VTYSH_PATH); |
718e3744 | 387 | |
887c44a4 | 388 | /* Print banner. */ |
389 | zlog_notice ("Zebra %s starting: vty@%d", QUAGGA_VERSION, vty_port); | |
390 | ||
b21b19c5 | 391 | while (thread_fetch (zebrad.master, &thread)) |
718e3744 | 392 | thread_call (&thread); |
393 | ||
394 | /* Not reached... */ | |
e8e1946e | 395 | return 0; |
718e3744 | 396 | } |