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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" |
718e3744 | 34 | |
35 | #include "bgpd/bgpd.h" | |
36 | #include "bgpd/bgp_attr.h" | |
37 | #include "bgpd/bgp_mplsvpn.h" | |
38 | ||
39 | /* bgpd options, we use GNU getopt library. */ | |
40 | struct option longopts[] = | |
41 | { | |
42 | { "daemon", no_argument, NULL, 'd'}, | |
43 | { "config_file", required_argument, NULL, 'f'}, | |
44 | { "pid_file", required_argument, NULL, 'i'}, | |
45 | { "bgp_port", required_argument, NULL, 'p'}, | |
46 | { "vty_addr", required_argument, NULL, 'A'}, | |
47 | { "vty_port", required_argument, NULL, 'P'}, | |
48 | { "retain", no_argument, NULL, 'r'}, | |
49 | { "no_kernel", no_argument, NULL, 'n'}, | |
edd7c245 | 50 | { "user", required_argument, NULL, 'u'}, |
c065230a | 51 | { "group", required_argument, NULL, 'g'}, |
718e3744 | 52 | { "version", no_argument, NULL, 'v'}, |
53 | { "help", no_argument, NULL, 'h'}, | |
54 | { 0 } | |
55 | }; | |
56 | ||
2d75d052 | 57 | /* signal definitions */ |
58 | void sighup (void); | |
59 | void sigint (void); | |
60 | void sigusr1 (void); | |
61 | ||
62 | struct quagga_signal_t bgp_signals[] = | |
63 | { | |
64 | { | |
65 | .signal = SIGHUP, | |
66 | .handler = &sighup, | |
67 | }, | |
68 | { | |
69 | .signal = SIGUSR1, | |
70 | .handler = &sigusr1, | |
71 | }, | |
72 | { | |
73 | .signal = SIGINT, | |
74 | .handler = &sigint, | |
f571dab0 | 75 | }, |
76 | { | |
77 | .signal = SIGTERM, | |
78 | .handler = &sigint, | |
2d75d052 | 79 | }, |
80 | }; | |
81 | ||
718e3744 | 82 | /* Configuration file and directory. */ |
718e3744 | 83 | char config_default[] = SYSCONFDIR BGP_DEFAULT_CONFIG; |
84 | ||
85 | /* Route retain mode flag. */ | |
86 | int retain_mode = 0; | |
87 | ||
88 | /* Master of threads. */ | |
89 | struct thread_master *master; | |
90 | ||
91 | /* Manually specified configuration file name. */ | |
92 | char *config_file = NULL; | |
93 | ||
94 | /* Process ID saved for use by init system */ | |
fd79ac91 | 95 | const char *pid_file = PATH_BGPD_PID; |
718e3744 | 96 | |
97 | /* VTY port number and address. */ | |
98 | int vty_port = BGP_VTY_PORT; | |
99 | char *vty_addr = NULL; | |
100 | ||
edd7c245 | 101 | /* privileges */ |
102 | zebra_capabilities_t _caps_p [] = | |
103 | { | |
98f5163c | 104 | ZCAP_BIND, |
ceacedba | 105 | ZCAP_NET_RAW, |
edd7c245 | 106 | }; |
107 | ||
108 | struct zebra_privs_t bgpd_privs = | |
109 | { | |
d81fadfd | 110 | #if defined(QUAGGA_USER) && defined(QUAGGA_GROUP) |
111 | .user = QUAGGA_USER, | |
112 | .group = QUAGGA_GROUP, | |
113 | #endif | |
114 | #ifdef VTY_GROUP | |
115 | .vty_group = VTY_GROUP, | |
edd7c245 | 116 | #endif |
117 | .caps_p = _caps_p, | |
118 | .cap_num_p = sizeof(_caps_p)/sizeof(_caps_p[0]), | |
119 | .cap_num_i = 0, | |
120 | }; | |
121 | ||
718e3744 | 122 | /* Help information display. */ |
123 | static void | |
124 | usage (char *progname, int status) | |
125 | { | |
126 | if (status != 0) | |
127 | fprintf (stderr, "Try `%s --help' for more information.\n", progname); | |
128 | else | |
129 | { | |
130 | printf ("Usage : %s [OPTION...]\n\n\ | |
131 | Daemon which manages kernel routing table management and \ | |
132 | redistribution between different routing protocols.\n\n\ | |
133 | -d, --daemon Runs in daemon mode\n\ | |
134 | -f, --config_file Set configuration file name\n\ | |
135 | -i, --pid_file Set process identifier file name\n\ | |
136 | -p, --bgp_port Set bgp protocol's port number\n\ | |
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 by bgpd.\n\ | |
140 | -n, --no_kernel Do not install route to kernel.\n\ | |
c065230a | 141 | -u, --user User to run as\n\ |
142 | -g, --group Group to run as\n\ | |
718e3744 | 143 | -v, --version Print program version\n\ |
144 | -h, --help Display this help and exit\n\ | |
145 | \n\ | |
146 | Report bugs to %s\n", progname, ZEBRA_BUG_ADDRESS); | |
147 | } | |
148 | ||
149 | exit (status); | |
150 | } | |
151 | \f | |
152 | /* SIGHUP handler. */ | |
153 | void | |
2d75d052 | 154 | sighup (void) |
718e3744 | 155 | { |
156 | zlog (NULL, LOG_INFO, "SIGHUP received"); | |
157 | ||
158 | /* Terminate all thread. */ | |
159 | bgp_terminate (); | |
160 | bgp_reset (); | |
161 | zlog_info ("bgpd restarting!"); | |
162 | ||
163 | /* Reload config file. */ | |
320ec10a | 164 | vty_read_config (config_file, config_default); |
718e3744 | 165 | |
166 | /* Create VTY's socket */ | |
4fc4e7ab | 167 | vty_serv_sock (vty_addr, vty_port, BGP_VTYSH_PATH); |
718e3744 | 168 | |
169 | /* Try to return to normal operation. */ | |
170 | } | |
171 | ||
172 | /* SIGINT handler. */ | |
173 | void | |
2d75d052 | 174 | sigint (void) |
718e3744 | 175 | { |
887c44a4 | 176 | zlog_notice ("Terminating on signal"); |
718e3744 | 177 | |
178 | if (! retain_mode) | |
179 | bgp_terminate (); | |
180 | ||
181 | exit (0); | |
182 | } | |
183 | ||
184 | /* SIGUSR1 handler. */ | |
185 | void | |
2d75d052 | 186 | sigusr1 (void) |
718e3744 | 187 | { |
188 | zlog_rotate (NULL); | |
189 | } | |
718e3744 | 190 | \f |
191 | /* Main routine of bgpd. Treatment of argument and start bgp finite | |
192 | state machine is handled at here. */ | |
193 | int | |
194 | main (int argc, char **argv) | |
195 | { | |
196 | char *p; | |
197 | int opt; | |
198 | int daemon_mode = 0; | |
199 | char *progname; | |
200 | struct thread thread; | |
201 | ||
202 | /* Set umask before anything for security */ | |
203 | umask (0027); | |
204 | ||
205 | /* Preserve name of myself. */ | |
206 | progname = ((p = strrchr (argv[0], '/')) ? ++p : argv[0]); | |
207 | ||
274a4a44 | 208 | zlog_default = openzlog (progname, ZLOG_BGP, |
718e3744 | 209 | LOG_CONS|LOG_NDELAY|LOG_PID, LOG_DAEMON); |
210 | ||
211 | /* BGP master init. */ | |
212 | bgp_master_init (); | |
213 | ||
214 | /* Command line argument treatment. */ | |
215 | while (1) | |
216 | { | |
c065230a | 217 | opt = getopt_long (argc, argv, "df:i:hp:A:P:rnu:g:v", longopts, 0); |
718e3744 | 218 | |
219 | if (opt == EOF) | |
220 | break; | |
221 | ||
222 | switch (opt) | |
223 | { | |
224 | case 0: | |
225 | break; | |
226 | case 'd': | |
227 | daemon_mode = 1; | |
228 | break; | |
229 | case 'f': | |
230 | config_file = optarg; | |
231 | break; | |
232 | case 'i': | |
233 | pid_file = optarg; | |
234 | break; | |
235 | case 'p': | |
236 | bm->port = atoi (optarg); | |
237 | break; | |
238 | case 'A': | |
239 | vty_addr = optarg; | |
240 | break; | |
241 | case 'P': | |
4fc4e7ab | 242 | /* Deal with atoi() returning 0 on failure, and bgpd not |
243 | listening on bgp port... */ | |
244 | if (strcmp(optarg, "0") == 0) | |
245 | { | |
246 | vty_port = 0; | |
247 | break; | |
248 | } | |
249 | vty_port = atoi (optarg); | |
250 | vty_port = (vty_port ? vty_port : BGP_VTY_PORT); | |
718e3744 | 251 | break; |
252 | case 'r': | |
253 | retain_mode = 1; | |
254 | break; | |
255 | case 'n': | |
256 | bgp_option_set (BGP_OPT_NO_FIB); | |
257 | break; | |
c065230a | 258 | case 'u': |
259 | bgpd_privs.user = optarg; | |
260 | break; | |
261 | case 'g': | |
262 | 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)); | |
2d75d052 | 282 | signal_init (master, Q_SIGC(bgp_signals), bgp_signals); |
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. */ | |
320ec10a | 295 | vty_read_config (config_file, config_default); |
718e3744 | 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. */ | |
887c44a4 | 308 | zlog_notice ("BGPd %s starting: vty@%d, bgp@%d", QUAGGA_VERSION, |
309 | vty_port, bm->port); | |
718e3744 | 310 | |
311 | /* Start finite state machine, here we go! */ | |
312 | while (thread_fetch (master, &thread)) | |
313 | thread_call (&thread); | |
314 | ||
315 | /* Not reached. */ | |
e8e1946e | 316 | return (0); |
718e3744 | 317 | } |