1: /*
2: * RIPngd main routine.
3: * Copyright (C) 1998, 1999 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 <lib/version.h>
26: #include "getopt.h"
27: #include "vector.h"
28: #include "vty.h"
29: #include "command.h"
30: #include "memory.h"
31: #include "thread.h"
32: #include "log.h"
33: #include "prefix.h"
34: #include "if.h"
35: #include "privs.h"
36: #include "sigevent.h"
37:
38: #include "ripngd/ripngd.h"
39:
40: /* Configuration filename and directory. */
41: char config_default[] = SYSCONFDIR RIPNG_DEFAULT_CONFIG;
42: char *config_file = NULL;
43:
44: /* RIPngd options. */
45: struct option longopts[] =
46: {
47: { "daemon", no_argument, NULL, 'd'},
48: { "config_file", required_argument, NULL, 'f'},
49: { "pid_file", required_argument, NULL, 'i'},
50: { "dryrun", no_argument, NULL, 'C'},
51: { "help", no_argument, NULL, 'h'},
52: { "vty_addr", required_argument, NULL, 'A'},
53: { "vty_port", required_argument, NULL, 'P'},
54: { "retain", no_argument, NULL, 'r'},
55: { "user", required_argument, NULL, 'u'},
56: { "group", required_argument, NULL, 'g'},
57: { "version", no_argument, NULL, 'v'},
58: { 0 }
59: };
60:
61: /* ripngd privileges */
62: zebra_capabilities_t _caps_p [] =
63: {
64: ZCAP_NET_RAW,
65: ZCAP_BIND
66: };
67:
68: struct zebra_privs_t ripngd_privs =
69: {
70: #if defined(QUAGGA_USER)
71: .user = QUAGGA_USER,
72: #endif
73: #if defined QUAGGA_GROUP
74: .group = QUAGGA_GROUP,
75: #endif
76: #ifdef VTY_GROUP
77: .vty_group = VTY_GROUP,
78: #endif
79: .caps_p = _caps_p,
80: .cap_num_p = 2,
81: .cap_num_i = 0
82: };
83:
84:
85: /* RIPngd program name */
86:
87: /* Route retain mode flag. */
88: int retain_mode = 0;
89:
90: /* RIPng VTY bind address. */
91: char *vty_addr = NULL;
92:
93: /* RIPng VTY connection port. */
94: int vty_port = RIPNG_VTY_PORT;
95:
96: /* Master of threads. */
97: struct thread_master *master;
98:
99: /* Process ID saved for use by init system */
100: const char *pid_file = PATH_RIPNGD_PID;
101:
102: /* Help information display. */
103: static void
104: usage (char *progname, int status)
105: {
106: if (status != 0)
107: fprintf (stderr, "Try `%s --help' for more information.\n", progname);
108: else
109: {
110: printf ("Usage : %s [OPTION...]\n\
111: Daemon which manages RIPng.\n\n\
112: -d, --daemon Runs in daemon mode\n\
113: -f, --config_file Set configuration file name\n\
114: -i, --pid_file Set process identifier file name\n\
115: -A, --vty_addr Set vty's bind address\n\
116: -P, --vty_port Set vty's port number\n\
117: -r, --retain When program terminates, retain added route by ripngd.\n\
118: -u, --user User to run as\n\
119: -g, --group Group to run as\n\
120: -v, --version Print program version\n\
121: -C, --dryrun Check configuration for validity and exit\n\
122: -h, --help Display this help and exit\n\
123: \n\
124: Report bugs to %s\n", progname, ZEBRA_BUG_ADDRESS);
125: }
126: exit (status);
127: }
128:
129: /* SIGHUP handler. */
130: static void
131: sighup (void)
132: {
133: zlog_info ("SIGHUP received");
134: ripng_clean ();
135: ripng_reset ();
136:
137: /* Reload config file. */
138: vty_read_config (config_file, config_default);
139: /* Create VTY's socket */
140: vty_serv_sock (vty_addr, vty_port, RIPNG_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: ripng_clean ();
153:
154: exit (0);
155: }
156:
157: /* SIGUSR1 handler. */
158: static void
159: sigusr1 (void)
160: {
161: zlog_rotate (NULL);
162: }
163:
164: struct quagga_signal_t ripng_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: /* RIPngd main routine. */
185: int
186: main (int argc, char **argv)
187: {
188: char *p;
189: int vty_port = RIPNG_VTY_PORT;
190: int daemon_mode = 0;
191: char *progname;
192: struct thread thread;
193: int dryrun = 0;
194:
195: /* Set umask before anything for security */
196: umask (0027);
197:
198: /* get program name */
199: progname = ((p = strrchr (argv[0], '/')) ? ++p : argv[0]);
200:
201: zlog_default = openzlog(progname, ZLOG_RIPNG,
202: LOG_CONS|LOG_NDELAY|LOG_PID, LOG_DAEMON);
203:
204: while (1)
205: {
206: int opt;
207:
208: opt = getopt_long (argc, argv, "df:i:hA:P:u:g:vC", longopts, 0);
209:
210: if (opt == EOF)
211: break;
212:
213: switch (opt)
214: {
215: case 0:
216: break;
217: case 'd':
218: daemon_mode = 1;
219: break;
220: case 'f':
221: config_file = optarg;
222: break;
223: case 'A':
224: vty_addr = optarg;
225: break;
226: case 'i':
227: pid_file = optarg;
228: break;
229: case 'P':
230: /* Deal with atoi() returning 0 on failure, and ripngd not
231: listening on ripngd port... */
232: if (strcmp(optarg, "0") == 0)
233: {
234: vty_port = 0;
235: break;
236: }
237: vty_port = atoi (optarg);
238: if (vty_port <= 0 || vty_port > 0xffff)
239: vty_port = RIPNG_VTY_PORT;
240: break;
241: case 'r':
242: retain_mode = 1;
243: break;
244: case 'u':
245: ripngd_privs.user = optarg;
246: break;
247: case 'g':
248: ripngd_privs.group = optarg;
249: break;
250: case 'v':
251: print_version (progname);
252: exit (0);
253: break;
254: case 'C':
255: dryrun = 1;
256: break;
257: case 'h':
258: usage (progname, 0);
259: break;
260: default:
261: usage (progname, 1);
262: break;
263: }
264: }
265:
266: master = thread_master_create ();
267:
268: /* Library inits. */
269: zprivs_init (&ripngd_privs);
270: signal_init (master, Q_SIGC(ripng_signals), ripng_signals);
271: cmd_init (1);
272: vty_init (master);
273: memory_init ();
274:
275: /* RIPngd inits. */
276: ripng_init ();
277: zebra_init ();
278: ripng_peer_init ();
279:
280: /* Sort all installed commands. */
281: sort_node ();
282:
283: /* Get configuration file. */
284: vty_read_config (config_file, config_default);
285:
286: /* Start execution only if not in dry-run mode */
287: if(dryrun)
288: return(0);
289:
290: /* Change to the daemon program. */
291: if (daemon_mode && daemon (0, 0) < 0)
292: {
293: zlog_err("RIPNGd daemon failed: %s", strerror(errno));
294: exit (1);
295: }
296:
297: /* Create VTY socket */
298: vty_serv_sock (vty_addr, vty_port, RIPNG_VTYSH_PATH);
299:
300: /* Process id file create. */
301: pid_output (pid_file);
302:
303: /* Print banner. */
304: zlog_notice ("RIPNGd %s starting: vty@%d", QUAGGA_VERSION, vty_port);
305:
306: /* Fetch next active thread. */
307: while (thread_fetch (master, &thread))
308: thread_call (&thread);
309:
310: /* Not reached. */
311: return 0;
312: }
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