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718e3744 | 1 | /* |
2 | * zebra daemon main routine. | |
3 | * Copyright (C) 1997, 98 Kunihiro Ishiguro | |
4 | * | |
5 | * This file is part of GNU Zebra. | |
6 | * | |
7 | * GNU Zebra is free software; you can redistribute it and/or modify it | |
8 | * under the terms of the GNU General Public License as published by the | |
9 | * Free Software Foundation; either version 2, or (at your option) any | |
10 | * later version. | |
11 | * | |
12 | * GNU Zebra is distributed in the hope that it will be useful, but | |
13 | * WITHOUT ANY WARRANTY; without even the implied warranty of | |
14 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU | |
15 | * General Public License for more details. | |
16 | * | |
17 | * You should have received a copy of the GNU General Public License | |
18 | * along with GNU Zebra; see the file COPYING. If not, write to the Free | |
19 | * Software Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA | |
20 | * 02111-1307, USA. | |
21 | */ | |
22 | ||
23 | #include <zebra.h> | |
24 | ||
25 | #include "version.h" | |
26 | #include "getopt.h" | |
27 | #include "command.h" | |
28 | #include "thread.h" | |
29 | #include "filter.h" | |
30 | #include "memory.h" | |
31 | #include "prefix.h" | |
32 | #include "log.h" | |
33 | ||
34 | #include "zebra/rib.h" | |
35 | #include "zebra/zserv.h" | |
36 | #include "zebra/debug.h" | |
37 | #include "zebra/rib.h" | |
38 | ||
39 | /* Master of threads. */ | |
40 | struct thread_master *master; | |
41 | ||
42 | /* process id. */ | |
43 | pid_t old_pid; | |
44 | pid_t pid; | |
45 | ||
46 | /* Route retain mode flag. */ | |
47 | int retain_mode = 0; | |
48 | ||
49 | /* Don't delete kernel route. */ | |
50 | int keep_kernel_mode = 0; | |
51 | ||
52 | /* Command line options. */ | |
53 | struct option longopts[] = | |
54 | { | |
55 | { "batch", no_argument, NULL, 'b'}, | |
56 | { "daemon", no_argument, NULL, 'd'}, | |
57 | { "keep_kernel", no_argument, NULL, 'k'}, | |
58 | { "log_mode", no_argument, NULL, 'l'}, | |
59 | { "config_file", required_argument, NULL, 'f'}, | |
60 | { "pid_file", required_argument, NULL, 'i'}, | |
61 | { "help", no_argument, NULL, 'h'}, | |
62 | { "vty_addr", required_argument, NULL, 'A'}, | |
63 | { "vty_port", required_argument, NULL, 'P'}, | |
64 | { "retain", no_argument, NULL, 'r'}, | |
65 | { "version", no_argument, NULL, 'v'}, | |
66 | { 0 } | |
67 | }; | |
68 | ||
69 | /* Default configuration file path. */ | |
70 | char config_current[] = DEFAULT_CONFIG_FILE; | |
71 | char config_default[] = SYSCONFDIR DEFAULT_CONFIG_FILE; | |
72 | ||
73 | /* Process ID saved for use by init system */ | |
74 | char *pid_file = PATH_ZEBRA_PID; | |
75 | ||
76 | /* Help information display. */ | |
77 | static void | |
78 | usage (char *progname, int status) | |
79 | { | |
80 | if (status != 0) | |
81 | fprintf (stderr, "Try `%s --help' for more information.\n", progname); | |
82 | else | |
83 | { | |
84 | printf ("Usage : %s [OPTION...]\n\n\ | |
85 | Daemon which manages kernel routing table management and \ | |
86 | redistribution between different routing protocols.\n\n\ | |
87 | -b, --batch Runs in batch mode\n\ | |
88 | -d, --daemon Runs in daemon mode\n\ | |
89 | -f, --config_file Set configuration file name\n\ | |
90 | -i, --pid_file Set process identifier file name\n\ | |
91 | -k, --keep_kernel Don't delete old routes which installed by zebra.\n\ | |
92 | -l, --log_mode Set verbose log mode flag\n\ | |
93 | -A, --vty_addr Set vty's bind address\n\ | |
94 | -P, --vty_port Set vty's port number\n\ | |
95 | -r, --retain When program terminates, retain added route by zebra.\n\ | |
96 | -v, --version Print program version\n\ | |
97 | -h, --help Display this help and exit\n\ | |
98 | \n\ | |
99 | Report bugs to %s\n", progname, ZEBRA_BUG_ADDRESS); | |
100 | } | |
101 | ||
102 | exit (status); | |
103 | } | |
104 | \f | |
105 | /* SIGHUP handler. */ | |
106 | void | |
107 | sighup (int sig) | |
108 | { | |
109 | zlog_info ("SIGHUP received"); | |
110 | ||
111 | /* Reload of config file. */ | |
112 | ; | |
113 | } | |
114 | ||
115 | /* SIGINT handler. */ | |
116 | void | |
117 | sigint (int sig) | |
118 | { | |
119 | /* Decrared in rib.c */ | |
120 | void rib_close (); | |
121 | ||
122 | zlog_info ("Terminating on signal"); | |
123 | ||
124 | if (!retain_mode) | |
125 | rib_close (); | |
126 | ||
127 | exit (0); | |
128 | } | |
129 | ||
130 | /* SIGUSR1 handler. */ | |
131 | void | |
132 | sigusr1 (int sig) | |
133 | { | |
134 | zlog_rotate (NULL); | |
135 | } | |
136 | ||
137 | /* Signale wrapper. */ | |
138 | RETSIGTYPE * | |
139 | signal_set (int signo, void (*func)(int)) | |
140 | { | |
141 | int ret; | |
142 | struct sigaction sig; | |
143 | struct sigaction osig; | |
144 | ||
145 | sig.sa_handler = func; | |
146 | sigemptyset (&sig.sa_mask); | |
147 | sig.sa_flags = 0; | |
148 | #ifdef SA_RESTART | |
149 | sig.sa_flags |= SA_RESTART; | |
150 | #endif /* SA_RESTART */ | |
151 | ||
152 | ret = sigaction (signo, &sig, &osig); | |
153 | ||
154 | if (ret < 0) | |
155 | return (SIG_ERR); | |
156 | else | |
157 | return (osig.sa_handler); | |
158 | } | |
159 | ||
160 | /* Initialization of signal handles. */ | |
161 | void | |
162 | signal_init () | |
163 | { | |
164 | signal_set (SIGHUP, sighup); | |
165 | signal_set (SIGINT, sigint); | |
166 | signal_set (SIGTERM, sigint); | |
167 | signal_set (SIGPIPE, SIG_IGN); | |
168 | signal_set (SIGUSR1, sigusr1); | |
169 | } | |
170 | \f | |
171 | /* Main startup routine. */ | |
172 | int | |
173 | main (int argc, char **argv) | |
174 | { | |
175 | char *p; | |
176 | char *vty_addr = NULL; | |
177 | int vty_port = 0; | |
178 | int batch_mode = 0; | |
179 | int daemon_mode = 0; | |
180 | char *config_file = NULL; | |
181 | char *progname; | |
182 | struct thread thread; | |
183 | void rib_weed_tables (); | |
184 | void zebra_vty_init (); | |
185 | ||
186 | /* Set umask before anything for security */ | |
187 | umask (0027); | |
188 | ||
189 | /* preserve my name */ | |
190 | progname = ((p = strrchr (argv[0], '/')) ? ++p : argv[0]); | |
191 | ||
192 | zlog_default = openzlog (progname, ZLOG_STDOUT, ZLOG_ZEBRA, | |
193 | LOG_CONS|LOG_NDELAY|LOG_PID, LOG_DAEMON); | |
194 | ||
195 | while (1) | |
196 | { | |
197 | int opt; | |
198 | ||
199 | opt = getopt_long (argc, argv, "bdklf:hA:P:rv", longopts, 0); | |
200 | ||
201 | if (opt == EOF) | |
202 | break; | |
203 | ||
204 | switch (opt) | |
205 | { | |
206 | case 0: | |
207 | break; | |
208 | case 'b': | |
209 | batch_mode = 1; | |
210 | case 'd': | |
211 | daemon_mode = 1; | |
212 | break; | |
213 | case 'k': | |
214 | keep_kernel_mode = 1; | |
215 | break; | |
216 | case 'l': | |
217 | /* log_mode = 1; */ | |
218 | break; | |
219 | case 'f': | |
220 | config_file = optarg; | |
221 | break; | |
222 | case 'A': | |
223 | vty_addr = optarg; | |
224 | break; | |
225 | case 'i': | |
226 | pid_file = optarg; | |
227 | break; | |
228 | case 'P': | |
229 | vty_port = atoi (optarg); | |
230 | break; | |
231 | case 'r': | |
232 | retain_mode = 1; | |
233 | break; | |
234 | case 'v': | |
235 | print_version (progname); | |
236 | exit (0); | |
237 | break; | |
238 | case 'h': | |
239 | usage (progname, 0); | |
240 | break; | |
241 | default: | |
242 | usage (progname, 1); | |
243 | break; | |
244 | } | |
245 | } | |
246 | ||
247 | /* Make master thread emulator. */ | |
248 | master = thread_master_create (); | |
249 | ||
250 | /* Vty related initialize. */ | |
251 | signal_init (); | |
252 | cmd_init (1); | |
253 | vty_init (); | |
254 | memory_init (); | |
255 | ||
256 | /* Zebra related initialize. */ | |
257 | zebra_init (); | |
258 | rib_init (); | |
259 | zebra_if_init (); | |
260 | zebra_debug_init (); | |
261 | zebra_vty_init (); | |
262 | access_list_init (); | |
263 | rtadv_init (); | |
264 | ||
265 | /* For debug purpose. */ | |
266 | /* SET_FLAG (zebra_debug_event, ZEBRA_DEBUG_EVENT); */ | |
267 | ||
268 | /* Make kernel routing socket. */ | |
269 | kernel_init (); | |
270 | interface_list (); | |
271 | route_read (); | |
272 | ||
273 | /* Sort VTY commands. */ | |
274 | sort_node (); | |
275 | ||
276 | #ifdef HAVE_SNMP | |
277 | zebra_snmp_init (); | |
278 | #endif /* HAVE_SNMP */ | |
279 | ||
280 | /* Clean up self inserted route. */ | |
281 | if (! keep_kernel_mode) | |
282 | rib_sweep_route (); | |
283 | ||
284 | /* Configuration file read*/ | |
285 | vty_read_config (config_file, config_current, config_default); | |
286 | ||
287 | /* Clean up rib. */ | |
288 | rib_weed_tables (); | |
289 | ||
290 | /* Exit when zebra is working in batch mode. */ | |
291 | if (batch_mode) | |
292 | exit (0); | |
293 | ||
294 | /* Needed for BSD routing socket. */ | |
295 | old_pid = getpid (); | |
296 | ||
297 | /* Daemonize. */ | |
298 | if (daemon_mode) | |
299 | daemon (0, 0); | |
300 | ||
301 | /* Output pid of zebra. */ | |
302 | pid_output (pid_file); | |
303 | ||
304 | /* Needed for BSD routing socket. */ | |
305 | pid = getpid (); | |
306 | ||
307 | /* Make vty server socket. */ | |
308 | vty_serv_sock (vty_addr, | |
309 | vty_port ? vty_port : ZEBRA_VTY_PORT, ZEBRA_VTYSH_PATH); | |
310 | ||
311 | while (thread_fetch (master, &thread)) | |
312 | thread_call (&thread); | |
313 | ||
314 | /* Not reached... */ | |
315 | exit (0); | |
316 | } |