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718e3744 | 1 | /* Main routine of bgpd. |
2 | Copyright (C) 1996, 97, 98, 1999 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 | #include <zebra.h> | |
22 | ||
23 | #include "vector.h" | |
24 | #include "vty.h" | |
25 | #include "command.h" | |
26 | #include "getopt.h" | |
27 | #include "thread.h" | |
5e4fa164 | 28 | #include <lib/version.h> |
718e3744 | 29 | #include "memory.h" |
30 | #include "prefix.h" | |
31 | #include "log.h" | |
edd7c245 | 32 | #include "privs.h" |
2d75d052 | 33 | #include "sigevent.h" |
228da428 CC |
34 | #include "zclient.h" |
35 | #include "routemap.h" | |
36 | #include "filter.h" | |
37 | #include "plist.h" | |
8196f13d | 38 | #include "stream.h" |
718e3744 | 39 | |
40 | #include "bgpd/bgpd.h" | |
41 | #include "bgpd/bgp_attr.h" | |
42 | #include "bgpd/bgp_mplsvpn.h" | |
228da428 CC |
43 | #include "bgpd/bgp_aspath.h" |
44 | #include "bgpd/bgp_dump.h" | |
45 | #include "bgpd/bgp_route.h" | |
46 | #include "bgpd/bgp_nexthop.h" | |
47 | #include "bgpd/bgp_regex.h" | |
48 | #include "bgpd/bgp_clist.h" | |
49 | #include "bgpd/bgp_debug.h" | |
50 | #include "bgpd/bgp_filter.h" | |
8196f13d | 51 | #include "bgpd/bgp_zebra.h" |
718e3744 | 52 | |
53 | /* bgpd options, we use GNU getopt library. */ | |
372b3c70 | 54 | static const struct option longopts[] = |
718e3744 | 55 | { |
56 | { "daemon", no_argument, NULL, 'd'}, | |
57 | { "config_file", required_argument, NULL, 'f'}, | |
58 | { "pid_file", required_argument, NULL, 'i'}, | |
b5114685 | 59 | { "socket", required_argument, NULL, 'z'}, |
718e3744 | 60 | { "bgp_port", required_argument, NULL, 'p'}, |
3a02d1f7 | 61 | { "listenon", required_argument, NULL, 'l'}, |
718e3744 | 62 | { "vty_addr", required_argument, NULL, 'A'}, |
63 | { "vty_port", required_argument, NULL, 'P'}, | |
64 | { "retain", no_argument, NULL, 'r'}, | |
65 | { "no_kernel", no_argument, NULL, 'n'}, | |
edd7c245 | 66 | { "user", required_argument, NULL, 'u'}, |
c065230a | 67 | { "group", required_argument, NULL, 'g'}, |
718e3744 | 68 | { "version", no_argument, NULL, 'v'}, |
876b8be0 | 69 | { "dryrun", no_argument, NULL, 'C'}, |
718e3744 | 70 | { "help", no_argument, NULL, 'h'}, |
71 | { 0 } | |
72 | }; | |
73 | ||
2d75d052 | 74 | /* signal definitions */ |
75 | void sighup (void); | |
76 | void sigint (void); | |
77 | void sigusr1 (void); | |
78 | ||
228da428 CC |
79 | static void bgp_exit (int); |
80 | ||
372b3c70 | 81 | static struct quagga_signal_t bgp_signals[] = |
2d75d052 | 82 | { |
83 | { | |
84 | .signal = SIGHUP, | |
85 | .handler = &sighup, | |
86 | }, | |
87 | { | |
88 | .signal = SIGUSR1, | |
89 | .handler = &sigusr1, | |
90 | }, | |
91 | { | |
92 | .signal = SIGINT, | |
93 | .handler = &sigint, | |
f571dab0 | 94 | }, |
95 | { | |
96 | .signal = SIGTERM, | |
97 | .handler = &sigint, | |
2d75d052 | 98 | }, |
99 | }; | |
100 | ||
718e3744 | 101 | /* Configuration file and directory. */ |
718e3744 | 102 | char config_default[] = SYSCONFDIR BGP_DEFAULT_CONFIG; |
103 | ||
104 | /* Route retain mode flag. */ | |
372b3c70 | 105 | static int retain_mode = 0; |
718e3744 | 106 | |
107 | /* Master of threads. */ | |
108 | struct thread_master *master; | |
109 | ||
110 | /* Manually specified configuration file name. */ | |
111 | char *config_file = NULL; | |
112 | ||
113 | /* Process ID saved for use by init system */ | |
372b3c70 | 114 | static const char *pid_file = PATH_BGPD_PID; |
718e3744 | 115 | |
116 | /* VTY port number and address. */ | |
117 | int vty_port = BGP_VTY_PORT; | |
118 | char *vty_addr = NULL; | |
119 | ||
edd7c245 | 120 | /* privileges */ |
372b3c70 | 121 | static zebra_capabilities_t _caps_p [] = |
edd7c245 | 122 | { |
98f5163c | 123 | ZCAP_BIND, |
ceacedba | 124 | ZCAP_NET_RAW, |
5c88f19d | 125 | ZCAP_NET_ADMIN, |
edd7c245 | 126 | }; |
127 | ||
128 | struct zebra_privs_t bgpd_privs = | |
129 | { | |
d81fadfd | 130 | #if defined(QUAGGA_USER) && defined(QUAGGA_GROUP) |
131 | .user = QUAGGA_USER, | |
132 | .group = QUAGGA_GROUP, | |
133 | #endif | |
134 | #ifdef VTY_GROUP | |
135 | .vty_group = VTY_GROUP, | |
edd7c245 | 136 | #endif |
137 | .caps_p = _caps_p, | |
837d16cc | 138 | .cap_num_p = array_size(_caps_p), |
edd7c245 | 139 | .cap_num_i = 0, |
140 | }; | |
141 | ||
718e3744 | 142 | /* Help information display. */ |
143 | static void | |
144 | usage (char *progname, int status) | |
145 | { | |
146 | if (status != 0) | |
147 | fprintf (stderr, "Try `%s --help' for more information.\n", progname); | |
148 | else | |
149 | { | |
150 | printf ("Usage : %s [OPTION...]\n\n\ | |
151 | Daemon which manages kernel routing table management and \ | |
152 | redistribution between different routing protocols.\n\n\ | |
153 | -d, --daemon Runs in daemon mode\n\ | |
154 | -f, --config_file Set configuration file name\n\ | |
155 | -i, --pid_file Set process identifier file name\n\ | |
b5114685 | 156 | -z, --socket Set path of zebra socket\n\ |
718e3744 | 157 | -p, --bgp_port Set bgp protocol's port number\n\ |
3a02d1f7 | 158 | -l, --listenon Listen on specified address (implies -n)\n\ |
718e3744 | 159 | -A, --vty_addr Set vty's bind address\n\ |
160 | -P, --vty_port Set vty's port number\n\ | |
161 | -r, --retain When program terminates, retain added route by bgpd.\n\ | |
162 | -n, --no_kernel Do not install route to kernel.\n\ | |
c065230a | 163 | -u, --user User to run as\n\ |
164 | -g, --group Group to run as\n\ | |
718e3744 | 165 | -v, --version Print program version\n\ |
876b8be0 | 166 | -C, --dryrun Check configuration for validity and exit\n\ |
718e3744 | 167 | -h, --help Display this help and exit\n\ |
168 | \n\ | |
169 | Report bugs to %s\n", progname, ZEBRA_BUG_ADDRESS); | |
170 | } | |
171 | ||
172 | exit (status); | |
173 | } | |
174 | \f | |
175 | /* SIGHUP handler. */ | |
176 | void | |
2d75d052 | 177 | sighup (void) |
718e3744 | 178 | { |
179 | zlog (NULL, LOG_INFO, "SIGHUP received"); | |
180 | ||
181 | /* Terminate all thread. */ | |
182 | bgp_terminate (); | |
183 | bgp_reset (); | |
184 | zlog_info ("bgpd restarting!"); | |
185 | ||
186 | /* Reload config file. */ | |
320ec10a | 187 | vty_read_config (config_file, config_default); |
718e3744 | 188 | |
189 | /* Create VTY's socket */ | |
4fc4e7ab | 190 | vty_serv_sock (vty_addr, vty_port, BGP_VTYSH_PATH); |
718e3744 | 191 | |
192 | /* Try to return to normal operation. */ | |
193 | } | |
194 | ||
195 | /* SIGINT handler. */ | |
196 | void | |
2d75d052 | 197 | sigint (void) |
718e3744 | 198 | { |
887c44a4 | 199 | zlog_notice ("Terminating on signal"); |
718e3744 | 200 | |
201 | if (! retain_mode) | |
202 | bgp_terminate (); | |
203 | ||
04d5e24d | 204 | zprivs_terminate (&bgpd_privs); |
228da428 | 205 | bgp_exit (0); |
718e3744 | 206 | } |
207 | ||
208 | /* SIGUSR1 handler. */ | |
209 | void | |
2d75d052 | 210 | sigusr1 (void) |
718e3744 | 211 | { |
212 | zlog_rotate (NULL); | |
213 | } | |
228da428 CC |
214 | |
215 | /* | |
216 | Try to free up allocations we know about so that diagnostic tools such as | |
217 | valgrind are able to better illuminate leaks. | |
218 | ||
219 | Zebra route removal and protocol teardown are not meant to be done here. | |
220 | For example, "retain_mode" may be set. | |
221 | */ | |
222 | static void | |
223 | bgp_exit (int status) | |
224 | { | |
225 | struct bgp *bgp; | |
226 | struct listnode *node, *nnode; | |
227 | int *socket; | |
228 | struct interface *ifp; | |
229 | extern struct zclient *zclient; | |
230 | extern struct zclient *zlookup; | |
231 | ||
232 | /* it only makes sense for this to be called on a clean exit */ | |
233 | assert (status == 0); | |
234 | ||
235 | /* reverse bgp_master_init */ | |
236 | for (ALL_LIST_ELEMENTS (bm->bgp, node, nnode, bgp)) | |
237 | bgp_delete (bgp); | |
238 | list_free (bm->bgp); | |
239 | ||
240 | /* reverse bgp_master_init */ | |
241 | for (ALL_LIST_ELEMENTS_RO(bm->listen_sockets, node, socket)) | |
242 | { | |
243 | if (close ((int)(long)socket) == -1) | |
244 | zlog_err ("close (%d): %s", (int)(long)socket, safe_strerror (errno)); | |
245 | } | |
246 | list_delete (bm->listen_sockets); | |
247 | ||
248 | /* reverse bgp_zebra_init/if_init */ | |
249 | if (retain_mode) | |
250 | if_add_hook (IF_DELETE_HOOK, NULL); | |
251 | for (ALL_LIST_ELEMENTS (iflist, node, nnode, ifp)) | |
6c88b44d CC |
252 | { |
253 | struct listnode *c_node, *c_nnode; | |
254 | struct connected *c; | |
255 | ||
256 | for (ALL_LIST_ELEMENTS (ifp->connected, c_node, c_nnode, c)) | |
257 | bgp_connected_delete (c); | |
258 | ||
259 | if_delete (ifp); | |
260 | } | |
228da428 CC |
261 | list_free (iflist); |
262 | ||
263 | /* reverse bgp_attr_init */ | |
264 | bgp_attr_finish (); | |
265 | ||
266 | /* reverse bgp_dump_init */ | |
267 | bgp_dump_finish (); | |
268 | ||
269 | /* reverse bgp_route_init */ | |
270 | bgp_route_finish (); | |
271 | ||
272 | /* reverse bgp_route_map_init/route_map_init */ | |
273 | route_map_finish (); | |
274 | ||
275 | /* reverse bgp_scan_init */ | |
276 | bgp_scan_finish (); | |
277 | ||
278 | /* reverse access_list_init */ | |
279 | access_list_add_hook (NULL); | |
280 | access_list_delete_hook (NULL); | |
281 | access_list_reset (); | |
282 | ||
283 | /* reverse bgp_filter_init */ | |
284 | as_list_add_hook (NULL); | |
285 | as_list_delete_hook (NULL); | |
286 | bgp_filter_reset (); | |
287 | ||
288 | /* reverse prefix_list_init */ | |
289 | prefix_list_add_hook (NULL); | |
290 | prefix_list_delete_hook (NULL); | |
291 | prefix_list_reset (); | |
292 | ||
293 | /* reverse community_list_init */ | |
294 | community_list_terminate (bgp_clist); | |
295 | ||
296 | cmd_terminate (); | |
297 | vty_terminate (); | |
298 | if (zclient) | |
299 | zclient_free (zclient); | |
300 | if (zlookup) | |
301 | zclient_free (zlookup); | |
8196f13d JB |
302 | if (bgp_nexthop_buf) |
303 | stream_free (bgp_nexthop_buf); | |
228da428 CC |
304 | |
305 | /* reverse bgp_master_init */ | |
306 | if (master) | |
307 | thread_master_free (master); | |
308 | ||
309 | if (zlog_default) | |
310 | closezlog (zlog_default); | |
311 | ||
312 | if (CONF_BGP_DEBUG (normal, NORMAL)) | |
313 | log_memstats_stderr ("bgpd"); | |
314 | ||
315 | exit (status); | |
316 | } | |
718e3744 | 317 | \f |
318 | /* Main routine of bgpd. Treatment of argument and start bgp finite | |
319 | state machine is handled at here. */ | |
320 | int | |
321 | main (int argc, char **argv) | |
322 | { | |
323 | char *p; | |
324 | int opt; | |
325 | int daemon_mode = 0; | |
876b8be0 | 326 | int dryrun = 0; |
718e3744 | 327 | char *progname; |
328 | struct thread thread; | |
0d6b2ee2 | 329 | int tmp_port; |
718e3744 | 330 | |
331 | /* Set umask before anything for security */ | |
332 | umask (0027); | |
333 | ||
334 | /* Preserve name of myself. */ | |
335 | progname = ((p = strrchr (argv[0], '/')) ? ++p : argv[0]); | |
336 | ||
274a4a44 | 337 | zlog_default = openzlog (progname, ZLOG_BGP, |
718e3744 | 338 | LOG_CONS|LOG_NDELAY|LOG_PID, LOG_DAEMON); |
339 | ||
340 | /* BGP master init. */ | |
341 | bgp_master_init (); | |
342 | ||
343 | /* Command line argument treatment. */ | |
344 | while (1) | |
345 | { | |
b5114685 | 346 | opt = getopt_long (argc, argv, "df:i:z:hp:l:A:P:rnu:g:vC", longopts, 0); |
718e3744 | 347 | |
348 | if (opt == EOF) | |
349 | break; | |
350 | ||
351 | switch (opt) | |
352 | { | |
353 | case 0: | |
354 | break; | |
355 | case 'd': | |
356 | daemon_mode = 1; | |
357 | break; | |
358 | case 'f': | |
359 | config_file = optarg; | |
360 | break; | |
361 | case 'i': | |
362 | pid_file = optarg; | |
363 | break; | |
b5114685 VT |
364 | case 'z': |
365 | zclient_serv_path_set (optarg); | |
366 | break; | |
718e3744 | 367 | case 'p': |
0d6b2ee2 PJ |
368 | tmp_port = atoi (optarg); |
369 | if (tmp_port <= 0 || tmp_port > 0xffff) | |
370 | bm->port = BGP_PORT_DEFAULT; | |
371 | else | |
372 | bm->port = tmp_port; | |
718e3744 | 373 | break; |
374 | case 'A': | |
375 | vty_addr = optarg; | |
376 | break; | |
377 | case 'P': | |
4fc4e7ab | 378 | /* Deal with atoi() returning 0 on failure, and bgpd not |
379 | listening on bgp port... */ | |
380 | if (strcmp(optarg, "0") == 0) | |
381 | { | |
382 | vty_port = 0; | |
383 | break; | |
384 | } | |
385 | vty_port = atoi (optarg); | |
0d6b2ee2 PJ |
386 | if (vty_port <= 0 || vty_port > 0xffff) |
387 | vty_port = BGP_VTY_PORT; | |
718e3744 | 388 | break; |
389 | case 'r': | |
390 | retain_mode = 1; | |
391 | break; | |
3a02d1f7 PJ |
392 | case 'l': |
393 | bm->address = optarg; | |
394 | /* listenon implies -n */ | |
718e3744 | 395 | case 'n': |
396 | bgp_option_set (BGP_OPT_NO_FIB); | |
397 | break; | |
c065230a | 398 | case 'u': |
399 | bgpd_privs.user = optarg; | |
400 | break; | |
401 | case 'g': | |
402 | bgpd_privs.group = optarg; | |
403 | break; | |
718e3744 | 404 | case 'v': |
405 | print_version (progname); | |
406 | exit (0); | |
407 | break; | |
876b8be0 PJ |
408 | case 'C': |
409 | dryrun = 1; | |
410 | break; | |
718e3744 | 411 | case 'h': |
412 | usage (progname, 0); | |
413 | break; | |
414 | default: | |
415 | usage (progname, 1); | |
416 | break; | |
417 | } | |
418 | } | |
419 | ||
420 | /* Make thread master. */ | |
421 | master = bm->master; | |
422 | ||
423 | /* Initializations. */ | |
424 | srand (time (NULL)); | |
837d16cc | 425 | signal_init (master, array_size(bgp_signals), bgp_signals); |
edd7c245 | 426 | zprivs_init (&bgpd_privs); |
718e3744 | 427 | cmd_init (1); |
b21b19c5 | 428 | vty_init (master); |
718e3744 | 429 | memory_init (); |
430 | ||
431 | /* BGP related initialization. */ | |
432 | bgp_init (); | |
433 | ||
718e3744 | 434 | /* Parse config file. */ |
320ec10a | 435 | vty_read_config (config_file, config_default); |
718e3744 | 436 | |
876b8be0 PJ |
437 | /* Start execution only if not in dry-run mode */ |
438 | if(dryrun) | |
439 | return(0); | |
440 | ||
718e3744 | 441 | /* Turn into daemon if daemon_mode is set. */ |
372b3c70 SH |
442 | if (daemon_mode && daemon (0, 0) < 0) |
443 | { | |
444 | zlog_err("BGPd daemon failed: %s", strerror(errno)); | |
445 | return (1); | |
446 | } | |
447 | ||
718e3744 | 448 | |
449 | /* Process ID file creation. */ | |
450 | pid_output (pid_file); | |
451 | ||
452 | /* Make bgp vty socket. */ | |
453 | vty_serv_sock (vty_addr, vty_port, BGP_VTYSH_PATH); | |
454 | ||
455 | /* Print banner. */ | |
3a02d1f7 | 456 | zlog_notice ("BGPd %s starting: vty@%d, bgp@%s:%d", QUAGGA_VERSION, |
7e992e95 | 457 | vty_port, |
b63e6089 | 458 | (bm->address ? bm->address : "<all>"), |
7e992e95 | 459 | bm->port); |
718e3744 | 460 | |
461 | /* Start finite state machine, here we go! */ | |
462 | while (thread_fetch (master, &thread)) | |
463 | thread_call (&thread); | |
464 | ||
465 | /* Not reached. */ | |
e8e1946e | 466 | return (0); |
718e3744 | 467 | } |