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718e3744 | 1 | /* RIPd main routine. |
2 | * Copyright (C) 1997, 98 Kunihiro Ishiguro <kunihiro@zebra.org> | |
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 | ||
24 | #include "version.h" | |
25 | #include "getopt.h" | |
26 | #include "thread.h" | |
27 | #include "command.h" | |
28 | #include "memory.h" | |
29 | #include "prefix.h" | |
30 | #include "filter.h" | |
31 | #include "keychain.h" | |
32 | #include "log.h" | |
33 | ||
34 | #include "ripd/ripd.h" | |
35 | ||
36 | /* ripd options. */ | |
37 | static struct option longopts[] = | |
38 | { | |
39 | { "daemon", no_argument, NULL, 'd'}, | |
40 | { "config_file", required_argument, NULL, 'f'}, | |
41 | { "pid_file", required_argument, NULL, 'i'}, | |
42 | { "help", no_argument, NULL, 'h'}, | |
43 | { "vty_addr", required_argument, NULL, 'A'}, | |
44 | { "vty_port", required_argument, NULL, 'P'}, | |
45 | { "retain", no_argument, NULL, 'r'}, | |
46 | { "version", no_argument, NULL, 'v'}, | |
47 | { 0 } | |
48 | }; | |
49 | ||
50 | /* Configuration file and directory. */ | |
51 | char config_current[] = RIPD_DEFAULT_CONFIG; | |
52 | char config_default[] = SYSCONFDIR RIPD_DEFAULT_CONFIG; | |
53 | char *config_file = NULL; | |
54 | ||
55 | /* ripd program name */ | |
56 | ||
57 | /* Route retain mode flag. */ | |
58 | int retain_mode = 0; | |
59 | ||
60 | /* RIP VTY bind address. */ | |
61 | char *vty_addr = NULL; | |
62 | ||
63 | /* RIP VTY connection port. */ | |
64 | int vty_port = RIP_VTY_PORT; | |
65 | ||
66 | /* Master of threads. */ | |
67 | struct thread_master *master; | |
68 | ||
69 | /* Process ID saved for use by init system */ | |
70 | char *pid_file = PATH_RIPD_PID; | |
71 | ||
72 | /* Help information display. */ | |
73 | static void | |
74 | usage (char *progname, int status) | |
75 | { | |
76 | if (status != 0) | |
77 | fprintf (stderr, "Try `%s --help' for more information.\n", progname); | |
78 | else | |
79 | { | |
80 | printf ("Usage : %s [OPTION...]\n\ | |
81 | Daemon which manages RIP version 1 and 2.\n\n\ | |
82 | -d, --daemon Runs in daemon mode\n\ | |
83 | -f, --config_file Set configuration file name\n\ | |
84 | -i, --pid_file Set process identifier file name\n\ | |
85 | -A, --vty_addr Set vty's bind address\n\ | |
86 | -P, --vty_port Set vty's port number\n\ | |
87 | -r, --retain When program terminates, retain added route by ripd.\n\ | |
88 | -v, --version Print program version\n\ | |
89 | -h, --help Display this help and exit\n\ | |
90 | \n\ | |
91 | Report bugs to %s\n", progname, ZEBRA_BUG_ADDRESS); | |
92 | } | |
93 | ||
94 | exit (status); | |
95 | } | |
96 | \f | |
97 | /* Signale wrapper. */ | |
98 | RETSIGTYPE * | |
99 | signal_set (int signo, void (*func)(int)) | |
100 | { | |
101 | int ret; | |
102 | struct sigaction sig; | |
103 | struct sigaction osig; | |
104 | ||
105 | sig.sa_handler = func; | |
106 | sigemptyset (&sig.sa_mask); | |
107 | sig.sa_flags = 0; | |
108 | #ifdef SA_RESTART | |
109 | sig.sa_flags |= SA_RESTART; | |
110 | #endif /* SA_RESTART */ | |
111 | ||
112 | ret = sigaction (signo, &sig, &osig); | |
113 | ||
114 | if (ret < 0) | |
115 | return (SIG_ERR); | |
116 | else | |
117 | return (osig.sa_handler); | |
118 | } | |
119 | ||
120 | /* SIGHUP handler. */ | |
121 | void | |
122 | sighup (int sig) | |
123 | { | |
124 | zlog_info ("SIGHUP received"); | |
125 | rip_clean (); | |
126 | rip_reset (); | |
127 | zlog_info ("ripd restarting!"); | |
128 | ||
129 | /* Reload config file. */ | |
130 | vty_read_config (config_file, config_current, config_default); | |
131 | ||
132 | /* Create VTY's socket */ | |
133 | vty_serv_sock (vty_addr, vty_port, RIP_VTYSH_PATH); | |
134 | ||
135 | /* Try to return to normal operation. */ | |
136 | } | |
137 | ||
138 | /* SIGINT handler. */ | |
139 | void | |
140 | sigint (int sig) | |
141 | { | |
142 | zlog (NULL, LOG_INFO, "Terminating on signal"); | |
143 | ||
144 | if (! retain_mode) | |
145 | rip_clean (); | |
146 | ||
147 | exit (0); | |
148 | } | |
149 | ||
150 | /* SIGUSR1 handler. */ | |
151 | void | |
152 | sigusr1 (int sig) | |
153 | { | |
154 | zlog_rotate (NULL); | |
155 | } | |
156 | ||
157 | /* Initialization of signal handles. */ | |
158 | void | |
159 | signal_init () | |
160 | { | |
161 | signal_set (SIGHUP, sighup); | |
162 | signal_set (SIGINT, sigint); | |
163 | signal_set (SIGTERM, sigint); | |
164 | signal_set (SIGPIPE, SIG_IGN); | |
165 | signal_set (SIGUSR1, sigusr1); | |
166 | } | |
167 | \f | |
168 | /* Main routine of ripd. */ | |
169 | int | |
170 | main (int argc, char **argv) | |
171 | { | |
172 | char *p; | |
173 | int daemon_mode = 0; | |
174 | char *progname; | |
175 | struct thread thread; | |
176 | ||
177 | /* Set umask before anything for security */ | |
178 | umask (0027); | |
179 | ||
180 | /* Get program name. */ | |
181 | progname = ((p = strrchr (argv[0], '/')) ? ++p : argv[0]); | |
182 | ||
183 | /* First of all we need logging init. */ | |
184 | zlog_default = openzlog (progname, ZLOG_NOLOG, ZLOG_RIP, | |
185 | LOG_CONS|LOG_NDELAY|LOG_PID, LOG_DAEMON); | |
186 | ||
187 | /* Command line option parse. */ | |
188 | while (1) | |
189 | { | |
190 | int opt; | |
191 | ||
192 | opt = getopt_long (argc, argv, "df:hA:P:rv", longopts, 0); | |
193 | ||
194 | if (opt == EOF) | |
195 | break; | |
196 | ||
197 | switch (opt) | |
198 | { | |
199 | case 0: | |
200 | break; | |
201 | case 'd': | |
202 | daemon_mode = 1; | |
203 | break; | |
204 | case 'f': | |
205 | config_file = optarg; | |
206 | break; | |
207 | case 'A': | |
208 | vty_addr = optarg; | |
209 | break; | |
210 | case 'i': | |
211 | pid_file = optarg; | |
212 | break; | |
213 | case 'P': | |
214 | vty_port = atoi (optarg); | |
215 | break; | |
216 | case 'r': | |
217 | retain_mode = 1; | |
218 | break; | |
219 | case 'v': | |
220 | print_version (progname); | |
221 | exit (0); | |
222 | break; | |
223 | case 'h': | |
224 | usage (progname, 0); | |
225 | break; | |
226 | default: | |
227 | usage (progname, 1); | |
228 | break; | |
229 | } | |
230 | } | |
231 | ||
232 | /* Prepare master thread. */ | |
233 | master = thread_master_create (); | |
234 | ||
235 | /* Library initialization. */ | |
236 | signal_init (); | |
237 | cmd_init (1); | |
238 | vty_init (); | |
239 | memory_init (); | |
240 | keychain_init (); | |
241 | ||
242 | /* RIP related initialization. */ | |
243 | rip_init (); | |
244 | rip_if_init (); | |
245 | rip_zclient_init (); | |
246 | rip_peer_init (); | |
247 | ||
248 | /* Sort all installed commands. */ | |
249 | sort_node (); | |
250 | ||
251 | /* Get configuration file. */ | |
252 | vty_read_config (config_file, config_current, config_default); | |
253 | ||
254 | /* Change to the daemon program. */ | |
255 | if (daemon_mode) | |
256 | daemon (0, 0); | |
257 | ||
258 | /* Pid file create. */ | |
259 | pid_output (pid_file); | |
260 | ||
261 | /* Create VTY's socket */ | |
262 | vty_serv_sock (vty_addr, vty_port, RIP_VTYSH_PATH); | |
263 | ||
264 | /* Execute each thread. */ | |
265 | while (thread_fetch (master, &thread)) | |
266 | thread_call (&thread); | |
267 | ||
268 | /* Not reached. */ | |
269 | exit (0); | |
270 | } |