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 <lib/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: #include "privs.h"
34: #include "sigevent.h"
35:
36: #include "ripd/ripd.h"
37:
38: /* ripd options. */
39: static 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: { "help", no_argument, NULL, 'h'},
45: { "dryrun", no_argument, NULL, 'C'},
46: { "vty_addr", required_argument, NULL, 'A'},
47: { "vty_port", required_argument, NULL, 'P'},
48: { "retain", no_argument, NULL, 'r'},
49: { "user", required_argument, NULL, 'u'},
50: { "group", required_argument, NULL, 'g'},
51: { "version", no_argument, NULL, 'v'},
52: { 0 }
53: };
54:
55: /* ripd privileges */
56: zebra_capabilities_t _caps_p [] =
57: {
58: ZCAP_NET_RAW,
59: ZCAP_BIND
60: };
61:
62: struct zebra_privs_t ripd_privs =
63: {
64: #if defined(QUAGGA_USER)
65: .user = QUAGGA_USER,
66: #endif
67: #if defined QUAGGA_GROUP
68: .group = QUAGGA_GROUP,
69: #endif
70: #ifdef VTY_GROUP
71: .vty_group = VTY_GROUP,
72: #endif
73: .caps_p = _caps_p,
74: .cap_num_p = 2,
75: .cap_num_i = 0
76: };
77:
78: /* Configuration file and directory. */
79: char config_default[] = SYSCONFDIR RIPD_DEFAULT_CONFIG;
80: char *config_file = NULL;
81:
82: /* ripd program name */
83:
84: /* Route retain mode flag. */
85: int retain_mode = 0;
86:
87: /* RIP VTY bind address. */
88: char *vty_addr = NULL;
89:
90: /* RIP VTY connection port. */
91: int vty_port = RIP_VTY_PORT;
92:
93: /* Master of threads. */
94: struct thread_master *master;
95:
96: /* Process ID saved for use by init system */
97: const char *pid_file = PATH_RIPD_PID;
98:
99: /* Help information display. */
100: static void
101: usage (char *progname, int status)
102: {
103: if (status != 0)
104: fprintf (stderr, "Try `%s --help' for more information.\n", progname);
105: else
106: {
107: printf ("Usage : %s [OPTION...]\n\
108: Daemon which manages RIP version 1 and 2.\n\n\
109: -d, --daemon Runs in daemon mode\n\
110: -f, --config_file Set configuration file name\n\
111: -i, --pid_file Set process identifier file name\n\
112: -A, --vty_addr Set vty's bind address\n\
113: -P, --vty_port Set vty's port number\n\
114: -C, --dryrun Check configuration for validity and exit\n\
115: -r, --retain When program terminates, retain added route by ripd.\n\
116: -u, --user User to run as\n\
117: -g, --group Group to run as\n\
118: -v, --version Print program version\n\
119: -h, --help Display this help and exit\n\
120: \n\
121: Report bugs to %s\n", progname, ZEBRA_BUG_ADDRESS);
122: }
123:
124: exit (status);
125: }
126:
127: /* SIGHUP handler. */
128: static void
129: sighup (void)
130: {
131: zlog_info ("SIGHUP received");
132: rip_clean ();
133: rip_reset ();
134: zlog_info ("ripd restarting!");
135:
136: /* Reload config file. */
137: vty_read_config (config_file, config_default);
138:
139: /* Create VTY's socket */
140: vty_serv_sock (vty_addr, vty_port, RIP_VTYSH_PATH);
141:
142: /* Try to return to normal operation. */
143: }
144:
145: /* SIGINT handler. */
146: static void
147: sigint (void)
148: {
149: zlog_notice ("Terminating on signal");
150:
151: if (! retain_mode)
152: rip_clean ();
153:
154: exit (0);
155: }
156:
157: /* SIGUSR1 handler. */
158: static void
159: sigusr1 (void)
160: {
161: zlog_rotate (NULL);
162: }
163:
164: static struct quagga_signal_t ripd_signals[] =
165: {
166: {
167: .signal = SIGHUP,
168: .handler = &sighup,
169: },
170: {
171: .signal = SIGUSR1,
172: .handler = &sigusr1,
173: },
174: {
175: .signal = SIGINT,
176: .handler = &sigint,
177: },
178: {
179: .signal = SIGTERM,
180: .handler = &sigint,
181: },
182: };
183:
184: /* Main routine of ripd. */
185: int
186: main (int argc, char **argv)
187: {
188: char *p;
189: int daemon_mode = 0;
190: int dryrun = 0;
191: char *progname;
192: struct thread thread;
193:
194: /* Set umask before anything for security */
195: umask (0027);
196:
197: /* Get program name. */
198: progname = ((p = strrchr (argv[0], '/')) ? ++p : argv[0]);
199:
200: /* First of all we need logging init. */
201: zlog_default = openzlog (progname, ZLOG_RIP,
202: LOG_CONS|LOG_NDELAY|LOG_PID, LOG_DAEMON);
203:
204: /* Command line option parse. */
205: while (1)
206: {
207: int opt;
208:
209: opt = getopt_long (argc, argv, "df:i:hA:P:u:g:rvC", longopts, 0);
210:
211: if (opt == EOF)
212: break;
213:
214: switch (opt)
215: {
216: case 0:
217: break;
218: case 'd':
219: daemon_mode = 1;
220: break;
221: case 'f':
222: config_file = optarg;
223: break;
224: case 'A':
225: vty_addr = optarg;
226: break;
227: case 'i':
228: pid_file = optarg;
229: break;
230: case 'P':
231: /* Deal with atoi() returning 0 on failure, and ripd not
232: listening on rip port... */
233: if (strcmp(optarg, "0") == 0)
234: {
235: vty_port = 0;
236: break;
237: }
238: vty_port = atoi (optarg);
239: if (vty_port <= 0 || vty_port > 0xffff)
240: vty_port = RIP_VTY_PORT;
241: break;
242: case 'r':
243: retain_mode = 1;
244: break;
245: case 'C':
246: dryrun = 1;
247: break;
248: case 'u':
249: ripd_privs.user = optarg;
250: break;
251: case 'g':
252: ripd_privs.group = optarg;
253: break;
254: case 'v':
255: print_version (progname);
256: exit (0);
257: break;
258: case 'h':
259: usage (progname, 0);
260: break;
261: default:
262: usage (progname, 1);
263: break;
264: }
265: }
266:
267: /* Prepare master thread. */
268: master = thread_master_create ();
269:
270: /* Library initialization. */
271: zprivs_init (&ripd_privs);
272: signal_init (master, Q_SIGC(ripd_signals), ripd_signals);
273: cmd_init (1);
274: vty_init (master);
275: memory_init ();
276: keychain_init ();
277:
278: /* RIP related initialization. */
279: rip_init ();
280: rip_if_init ();
281: rip_zclient_init ();
282: rip_peer_init ();
283:
284: /* Sort all installed commands. */
285: sort_node ();
286:
287: /* Get configuration file. */
288: vty_read_config (config_file, config_default);
289:
290: /* Start execution only if not in dry-run mode */
291: if(dryrun)
292: return (0);
293:
294: /* Change to the daemon program. */
295: if (daemon_mode && daemon (0, 0) < 0)
296: {
297: zlog_err("RIPd daemon failed: %s", strerror(errno));
298: exit (1);
299: }
300:
301: /* Pid file create. */
302: pid_output (pid_file);
303:
304: /* Create VTY's socket */
305: vty_serv_sock (vty_addr, vty_port, RIP_VTYSH_PATH);
306:
307: /* Print banner. */
308: zlog_notice ("RIPd %s starting: vty@%d", QUAGGA_VERSION, vty_port);
309:
310: /* Execute each thread. */
311: while (thread_fetch (master, &thread))
312: thread_call (&thread);
313:
314: /* Not reached. */
315: return (0);
316: }
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