]>
Commit | Line | Data |
---|---|---|
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" | |
28 | #include "version.h" | |
29 | #include "memory.h" | |
30 | #include "prefix.h" | |
31 | #include "log.h" | |
edd7c245 | 32 | #include "privs.h" |
718e3744 | 33 | |
34 | #include "bgpd/bgpd.h" | |
35 | #include "bgpd/bgp_attr.h" | |
36 | #include "bgpd/bgp_mplsvpn.h" | |
37 | ||
38 | /* bgpd options, we use GNU getopt library. */ | |
39 | struct option longopts[] = | |
40 | { | |
41 | { "daemon", no_argument, NULL, 'd'}, | |
42 | { "config_file", required_argument, NULL, 'f'}, | |
43 | { "pid_file", required_argument, NULL, 'i'}, | |
44 | { "bgp_port", required_argument, NULL, 'p'}, | |
45 | { "vty_addr", required_argument, NULL, 'A'}, | |
46 | { "vty_port", required_argument, NULL, 'P'}, | |
47 | { "retain", no_argument, NULL, 'r'}, | |
48 | { "no_kernel", no_argument, NULL, 'n'}, | |
edd7c245 | 49 | { "user", required_argument, NULL, 'u'}, |
718e3744 | 50 | { "version", no_argument, NULL, 'v'}, |
51 | { "help", no_argument, NULL, 'h'}, | |
52 | { 0 } | |
53 | }; | |
54 | ||
55 | /* Configuration file and directory. */ | |
56 | char config_current[] = BGP_DEFAULT_CONFIG; | |
57 | char config_default[] = SYSCONFDIR BGP_DEFAULT_CONFIG; | |
58 | ||
59 | /* Route retain mode flag. */ | |
60 | int retain_mode = 0; | |
61 | ||
62 | /* Master of threads. */ | |
63 | struct thread_master *master; | |
64 | ||
65 | /* Manually specified configuration file name. */ | |
66 | char *config_file = NULL; | |
67 | ||
68 | /* Process ID saved for use by init system */ | |
69 | char *pid_file = PATH_BGPD_PID; | |
70 | ||
71 | /* VTY port number and address. */ | |
72 | int vty_port = BGP_VTY_PORT; | |
73 | char *vty_addr = NULL; | |
74 | ||
edd7c245 | 75 | /* privileges */ |
76 | zebra_capabilities_t _caps_p [] = | |
77 | { | |
78 | ZCAP_BIND, | |
79 | }; | |
80 | ||
81 | struct zebra_privs_t bgpd_privs = | |
82 | { | |
83 | #if defined(ZEBRA_USER) && defined(ZEBRA_GROUP) | |
84 | .user = ZEBRA_USER, | |
85 | .group = ZEBRA_GROUP, | |
86 | #endif | |
87 | .caps_p = _caps_p, | |
88 | .cap_num_p = sizeof(_caps_p)/sizeof(_caps_p[0]), | |
89 | .cap_num_i = 0, | |
90 | }; | |
91 | ||
718e3744 | 92 | /* Help information display. */ |
93 | static void | |
94 | usage (char *progname, int status) | |
95 | { | |
96 | if (status != 0) | |
97 | fprintf (stderr, "Try `%s --help' for more information.\n", progname); | |
98 | else | |
99 | { | |
100 | printf ("Usage : %s [OPTION...]\n\n\ | |
101 | Daemon which manages kernel routing table management and \ | |
102 | redistribution between different routing protocols.\n\n\ | |
103 | -d, --daemon Runs in daemon mode\n\ | |
104 | -f, --config_file Set configuration file name\n\ | |
105 | -i, --pid_file Set process identifier file name\n\ | |
106 | -p, --bgp_port Set bgp protocol's port number\n\ | |
107 | -A, --vty_addr Set vty's bind address\n\ | |
108 | -P, --vty_port Set vty's port number\n\ | |
109 | -r, --retain When program terminates, retain added route by bgpd.\n\ | |
110 | -n, --no_kernel Do not install route to kernel.\n\ | |
edd7c245 | 111 | -u, --user User and group to run as\n\ |
718e3744 | 112 | -v, --version Print program version\n\ |
113 | -h, --help Display this help and exit\n\ | |
114 | \n\ | |
115 | Report bugs to %s\n", progname, ZEBRA_BUG_ADDRESS); | |
116 | } | |
117 | ||
118 | exit (status); | |
119 | } | |
120 | \f | |
121 | /* SIGHUP handler. */ | |
122 | void | |
123 | sighup (int sig) | |
124 | { | |
125 | zlog (NULL, LOG_INFO, "SIGHUP received"); | |
126 | ||
127 | /* Terminate all thread. */ | |
128 | bgp_terminate (); | |
129 | bgp_reset (); | |
130 | zlog_info ("bgpd restarting!"); | |
131 | ||
132 | /* Reload config file. */ | |
133 | vty_read_config (config_file, config_current, config_default); | |
134 | ||
135 | /* Create VTY's socket */ | |
4fc4e7ab | 136 | vty_serv_sock (vty_addr, vty_port, BGP_VTYSH_PATH); |
718e3744 | 137 | |
138 | /* Try to return to normal operation. */ | |
139 | } | |
140 | ||
141 | /* SIGINT handler. */ | |
142 | void | |
143 | sigint (int sig) | |
144 | { | |
145 | zlog (NULL, LOG_INFO, "Terminating on signal"); | |
146 | ||
147 | if (! retain_mode) | |
148 | bgp_terminate (); | |
149 | ||
150 | exit (0); | |
151 | } | |
152 | ||
153 | /* SIGUSR1 handler. */ | |
154 | void | |
155 | sigusr1 (int sig) | |
156 | { | |
157 | zlog_rotate (NULL); | |
158 | } | |
159 | ||
160 | /* Signale wrapper. */ | |
161 | RETSIGTYPE * | |
162 | signal_set (int signo, void (*func)(int)) | |
163 | { | |
164 | int ret; | |
165 | struct sigaction sig; | |
166 | struct sigaction osig; | |
167 | ||
168 | sig.sa_handler = func; | |
169 | sigemptyset (&sig.sa_mask); | |
170 | sig.sa_flags = 0; | |
171 | #ifdef SA_RESTART | |
172 | sig.sa_flags |= SA_RESTART; | |
173 | #endif /* SA_RESTART */ | |
174 | ||
175 | ret = sigaction (signo, &sig, &osig); | |
176 | ||
177 | if (ret < 0) | |
178 | return (SIG_ERR); | |
179 | else | |
180 | return (osig.sa_handler); | |
181 | } | |
182 | ||
183 | /* Initialization of signal handles. */ | |
184 | void | |
185 | signal_init () | |
186 | { | |
187 | signal_set (SIGHUP, sighup); | |
188 | signal_set (SIGINT, sigint); | |
189 | signal_set (SIGTERM, sigint); | |
190 | signal_set (SIGPIPE, SIG_IGN); | |
191 | signal_set (SIGUSR1, sigusr1); | |
192 | } | |
193 | \f | |
194 | /* Main routine of bgpd. Treatment of argument and start bgp finite | |
195 | state machine is handled at here. */ | |
196 | int | |
197 | main (int argc, char **argv) | |
198 | { | |
199 | char *p; | |
200 | int opt; | |
201 | int daemon_mode = 0; | |
202 | char *progname; | |
203 | struct thread thread; | |
204 | ||
205 | /* Set umask before anything for security */ | |
206 | umask (0027); | |
207 | ||
208 | /* Preserve name of myself. */ | |
209 | progname = ((p = strrchr (argv[0], '/')) ? ++p : argv[0]); | |
210 | ||
211 | zlog_default = openzlog (progname, ZLOG_NOLOG, ZLOG_BGP, | |
212 | LOG_CONS|LOG_NDELAY|LOG_PID, LOG_DAEMON); | |
213 | ||
214 | /* BGP master init. */ | |
215 | bgp_master_init (); | |
216 | ||
217 | /* Command line argument treatment. */ | |
218 | while (1) | |
219 | { | |
96735eea | 220 | opt = getopt_long (argc, argv, "df:i:hp:A:P:rnu:v", longopts, 0); |
718e3744 | 221 | |
222 | if (opt == EOF) | |
223 | break; | |
224 | ||
225 | switch (opt) | |
226 | { | |
227 | case 0: | |
228 | break; | |
229 | case 'd': | |
230 | daemon_mode = 1; | |
231 | break; | |
232 | case 'f': | |
233 | config_file = optarg; | |
234 | break; | |
235 | case 'i': | |
236 | pid_file = optarg; | |
237 | break; | |
238 | case 'p': | |
239 | bm->port = atoi (optarg); | |
240 | break; | |
241 | case 'A': | |
242 | vty_addr = optarg; | |
243 | break; | |
244 | case 'P': | |
4fc4e7ab | 245 | /* Deal with atoi() returning 0 on failure, and bgpd not |
246 | listening on bgp port... */ | |
247 | if (strcmp(optarg, "0") == 0) | |
248 | { | |
249 | vty_port = 0; | |
250 | break; | |
251 | } | |
252 | vty_port = atoi (optarg); | |
253 | vty_port = (vty_port ? vty_port : BGP_VTY_PORT); | |
718e3744 | 254 | break; |
255 | case 'r': | |
256 | retain_mode = 1; | |
257 | break; | |
258 | case 'n': | |
259 | bgp_option_set (BGP_OPT_NO_FIB); | |
260 | break; | |
edd7c245 | 261 | case 'u': |
262 | bgpd_privs.user = bgpd_privs.group = optarg; | |
263 | break; | |
718e3744 | 264 | case 'v': |
265 | print_version (progname); | |
266 | exit (0); | |
267 | break; | |
268 | case 'h': | |
269 | usage (progname, 0); | |
270 | break; | |
271 | default: | |
272 | usage (progname, 1); | |
273 | break; | |
274 | } | |
275 | } | |
276 | ||
277 | /* Make thread master. */ | |
278 | master = bm->master; | |
279 | ||
280 | /* Initializations. */ | |
281 | srand (time (NULL)); | |
282 | signal_init (); | |
edd7c245 | 283 | zprivs_init (&bgpd_privs); |
718e3744 | 284 | cmd_init (1); |
b21b19c5 | 285 | vty_init (master); |
718e3744 | 286 | memory_init (); |
287 | ||
288 | /* BGP related initialization. */ | |
289 | bgp_init (); | |
290 | ||
291 | /* Sort CLI commands. */ | |
292 | sort_node (); | |
293 | ||
294 | /* Parse config file. */ | |
295 | vty_read_config (config_file, config_current, config_default); | |
296 | ||
297 | /* Turn into daemon if daemon_mode is set. */ | |
298 | if (daemon_mode) | |
299 | daemon (0, 0); | |
300 | ||
301 | /* Process ID file creation. */ | |
302 | pid_output (pid_file); | |
303 | ||
304 | /* Make bgp vty socket. */ | |
305 | vty_serv_sock (vty_addr, vty_port, BGP_VTYSH_PATH); | |
306 | ||
307 | /* Print banner. */ | |
e8f2984c | 308 | zlog_info ("BGPd %s starting: vty@%d, bgp@%d", QUAGGA_VERSION, |
718e3744 | 309 | vty_port, bm->port); |
310 | ||
311 | /* Start finite state machine, here we go! */ | |
312 | while (thread_fetch (master, &thread)) | |
313 | thread_call (&thread); | |
314 | ||
315 | /* Not reached. */ | |
316 | exit (0); | |
317 | } |