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. */
37static 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. */
51char config_current[] = RIPD_DEFAULT_CONFIG;
52char config_default[] = SYSCONFDIR RIPD_DEFAULT_CONFIG;
53char *config_file = NULL;
54
55/* ripd program name */
56
57/* Route retain mode flag. */
58int retain_mode = 0;
59
60/* RIP VTY bind address. */
61char *vty_addr = NULL;
62
63/* RIP VTY connection port. */
64int vty_port = RIP_VTY_PORT;
65
66/* Master of threads. */
67struct thread_master *master;
68
69/* Process ID saved for use by init system */
70char *pid_file = PATH_RIPD_PID;
71
72/* Help information display. */
73static void
74usage (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\
81Daemon 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\
91Report bugs to %s\n", progname, ZEBRA_BUG_ADDRESS);
92    }
93
94  exit (status);
95}
96
97/* Signale wrapper. */
98RETSIGTYPE *
99signal_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. */
121void
122sighup (int sig)
123{
124#ifdef FOX_RIP_DEBUG
125  zlog_info ("SIGHUP received");
126#endif /* FOX_RIP_DEBUG */
127  rip_clean ();
128  rip_reset ();
129#ifdef FOX_RIP_DEBUG
130  zlog_info ("ripd restarting!");
131#endif /* FOX_RIP_DEBUG */
132  /* Reload config file. */
133  vty_read_config (config_file, config_current, config_default);
134
135#ifdef FOX_CMD_SUPPORT
136  /* Create VTY's socket */
137  vty_serv_sock (vty_addr, vty_port, RIP_VTYSH_PATH);
138#endif /* FOX_CMD_SUPPORT */
139
140  /* Try to return to normal operation. */
141}
142
143/* SIGINT handler. */
144void
145sigint (int sig)
146{
147#ifdef FOX_RIP_DEBUG
148  zlog (NULL, LOG_INFO, "Terminating on signal");
149#endif /* FOX_RIP_DEBUG */
150  if (! retain_mode)
151    rip_clean ();
152
153  exit (0);
154}
155
156/* SIGUSR1 handler. */
157void
158sigusr1 (int sig)
159{
160#ifdef FOX_RIP_DEBUG
161  zlog_rotate (NULL);
162#endif /* FOX_RIP_DEBUG */
163}
164
165/* Initialization of signal handles. */
166void
167signal_init ()
168{
169  signal_set (SIGHUP, sighup);
170  signal_set (SIGINT, sigint);
171  signal_set (SIGTERM, sigint);
172  signal_set (SIGPIPE, SIG_IGN);
173  signal_set (SIGUSR1, sigusr1);
174}
175
176/* Main routine of ripd. */
177int
178main (int argc, char **argv)
179{
180  char *p;
181  int daemon_mode = 0;
182  char *progname;
183  struct thread thread;
184
185  /* Set umask before anything for security */
186  umask (0027);
187
188  /* Get program name. */
189  progname = ((p = strrchr (argv[0], '/')) ? ++p : argv[0]);
190
191#ifdef FOX_RIP_DEBUG
192  /* First of all we need logging init. */
193  zlog_default = openzlog (progname, ZLOG_NOLOG, ZLOG_RIP,
194			   LOG_CONS|LOG_NDELAY|LOG_PID, LOG_DAEMON);
195#endif /* FOX_RIP_DEBUG */
196
197  /* Command line option parse. */
198  while (1)
199    {
200      int opt;
201
202      opt = getopt_long (argc, argv, "df:hA:P:rv", longopts, 0);
203
204      if (opt == EOF)
205	break;
206
207      switch (opt)
208	{
209	case 0:
210	  break;
211	case 'd':
212	  daemon_mode = 1;
213	  break;
214	case 'f':
215	  config_file = optarg;
216	  break;
217	case 'A':
218	  vty_addr = optarg;
219	  break;
220        case 'i':
221          pid_file = optarg;
222          break;
223	case 'P':
224	  vty_port = atoi (optarg);
225	  break;
226	case 'r':
227	  retain_mode = 1;
228	  break;
229	case 'v':
230#ifdef FOX_CMD_SUPPORT
231	  print_version (progname);
232#endif /* FOX_CMD_SUPPORT */
233	  exit (0);
234	  break;
235	case 'h':
236	  usage (progname, 0);
237	  break;
238	default:
239	  usage (progname, 1);
240	  break;
241	}
242    }
243
244  /* Prepare master thread. */
245  master = thread_master_create ();
246
247  /* Library initialization. */
248  signal_init ();
249  cmd_init (1);
250  vty_init ();
251#ifdef FOX_CMD_SUPPORT
252  memory_init ();
253#endif /* FOX_CMD_SUPPORT */
254#ifdef FOX_AUTH_SUPPORT
255  keychain_init ();
256#endif /* FOX_AUTH_SUPPORT */
257
258  /* RIP related initialization. */
259  rip_init ();
260  rip_if_init ();
261  rip_zclient_init ();
262#ifdef FOX_RIP_DEBUG
263  rip_peer_init ();
264#endif /* FOX_RIP_DEBUG */
265
266  /* Sort all installed commands. */
267  sort_node ();
268
269  /* Get configuration file. */
270  vty_read_config (config_file, config_current, config_default);
271
272  /* Change to the daemon program. */
273  if (daemon_mode)
274    daemon (0, 0);
275
276  /* Pid file create. */
277  pid_output (pid_file);
278#ifdef FOX_CMD_SUPPORT
279  /* Create VTY's socket */
280  vty_serv_sock (vty_addr, vty_port, RIP_VTYSH_PATH);
281#endif /* BRCM_CMD_SUPPORT */
282
283  /* Execute each thread. */
284  while (thread_fetch (master, &thread))
285    thread_call (&thread);
286
287  /* Not reached. */
288  exit (0);
289}
290