1/*
2 * OSPFd main routine.
3 *   Copyright (C) 1998, 99 Kunihiro Ishiguro, Toshiaki Takada
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 "thread.h"
28#include "prefix.h"
29#include "linklist.h"
30#include "if.h"
31#include "vector.h"
32#include "vty.h"
33#include "command.h"
34#include "filter.h"
35#include "plist.h"
36#include "stream.h"
37#include "log.h"
38#include "memory.h"
39
40#include "ospfd/ospfd.h"
41#include "ospfd/ospf_interface.h"
42#include "ospfd/ospf_asbr.h"
43#include "ospfd/ospf_lsa.h"
44#include "ospfd/ospf_lsdb.h"
45#include "ospfd/ospf_neighbor.h"
46#include "ospfd/ospf_dump.h"
47#include "ospfd/ospf_zebra.h"
48#include "ospfd/ospf_vty.h"
49
50/* Configuration filename and directory. */
51char config_current[] = OSPF_DEFAULT_CONFIG;
52char config_default[] = SYSCONFDIR OSPF_DEFAULT_CONFIG;
53
54/* OSPFd options. */
55struct option longopts[] =
56{
57  { "daemon",      no_argument,       NULL, 'd'},
58  { "config_file", required_argument, NULL, 'f'},
59  { "pid_file",    required_argument, NULL, 'i'},
60  { "log_mode",    no_argument,       NULL, 'l'},
61  { "help",        no_argument,       NULL, 'h'},
62  { "vty_addr",    required_argument, NULL, 'A'},
63  { "vty_port",    required_argument, NULL, 'P'},
64  { "version",     no_argument,       NULL, 'v'},
65  { 0 }
66};
67
68/* OSPFd program name */
69
70/* Master of threads. */
71struct thread_master *master;
72
73/* Process ID saved for use by init system */
74char *pid_file = PATH_OSPFD_PID;
75
76/* Help information display. */
77static void
78usage (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\
85Daemon which manages OSPF.\n\n\
86-d, --daemon       Runs in daemon mode\n\
87-f, --config_file  Set configuration file name\n\
88-i, --pid_file     Set process identifier file name\n\
89-A, --vty_addr     Set vty's bind address\n\
90-P, --vty_port     Set vty's port number\n\
91-v, --version      Print program version\n\
92-h, --help         Display this help and exit\n\
93\n\
94Report bugs to %s\n", progname, ZEBRA_BUG_ADDRESS);
95    }
96  exit (status);
97}
98
99/* SIGHUP handler. */
100void
101sighup (int sig)
102{
103  zlog (NULL, LOG_INFO, "SIGHUP received");
104}
105
106/* SIGINT handler. */
107void
108sigint (int sig)
109{
110  zlog (NULL, LOG_INFO, "Terminating on signal");
111
112  ospf_terminate ();
113
114  exit (0);
115}
116
117/* SIGUSR1 handler. */
118void
119sigusr1 (int sig)
120{
121  zlog_rotate (NULL);
122}
123
124/* Signal wrapper. */
125RETSIGTYPE *
126signal_set (int signo, void (*func)(int))
127{
128  int ret;
129  struct sigaction sig;
130  struct sigaction osig;
131
132  sig.sa_handler = func;
133  sigemptyset (&sig.sa_mask);
134  sig.sa_flags = 0;
135#ifdef SA_RESTART
136  sig.sa_flags |= SA_RESTART;
137#endif /* SA_RESTART */
138
139  ret = sigaction (signo, &sig, &osig);
140
141  if (ret < 0)
142    return (SIG_ERR);
143  else
144    return (osig.sa_handler);
145}
146
147/* Initialization of signal handles. */
148void
149signal_init ()
150{
151  signal_set (SIGHUP, sighup);
152  signal_set (SIGINT, sigint);
153  signal_set (SIGTERM, sigint);
154  signal_set (SIGPIPE, SIG_IGN);
155#ifdef SIGTSTP
156  signal_set (SIGTSTP, SIG_IGN);
157#endif
158#ifdef SIGTTIN
159  signal_set (SIGTTIN, SIG_IGN);
160#endif
161#ifdef SIGTTOU
162  signal_set (SIGTTOU, SIG_IGN);
163#endif
164  signal_set (SIGUSR1, sigusr1);
165}
166
167/* OSPFd main routine. */
168int
169main (int argc, char **argv)
170{
171  char *p;
172  char *vty_addr = NULL;
173  int vty_port = 0;
174  int daemon_mode = 0;
175  char *config_file = NULL;
176  char *progname;
177  struct thread thread;
178
179  /* Set umask before anything for security */
180  umask (0027);
181
182  /* get program name */
183  progname = ((p = strrchr (argv[0], '/')) ? ++p : argv[0]);
184
185  /* Invoked by a priviledged user? -- endo. */
186  if (getuid () != 0)
187    {
188      errno = EPERM;
189      perror (progname);
190      exit (1);
191    }
192
193  zlog_default = openzlog (progname, ZLOG_NOLOG, ZLOG_OSPF,
194			   LOG_CONS|LOG_NDELAY|LOG_PID, LOG_DAEMON);
195
196  while (1)
197    {
198      int opt;
199
200      opt = getopt_long (argc, argv, "dlf:hA:P:v", longopts, 0);
201
202      if (opt == EOF)
203	break;
204
205      switch (opt)
206	{
207	case 0:
208	  break;
209	case 'd':
210	  daemon_mode = 1;
211	  break;
212	case 'f':
213	  config_file = optarg;
214	  break;
215	case 'A':
216	  vty_addr = optarg;
217	  break;
218        case 'i':
219          pid_file = optarg;
220          break;
221	case 'P':
222	  vty_port = atoi (optarg);
223	  break;
224	case 'v':
225	  print_version (progname);
226	  exit (0);
227	  break;
228	case 'h':
229	  usage (progname, 0);
230	  break;
231	default:
232	  usage (progname, 1);
233	  break;
234	}
235    }
236
237  /* Initializations. */
238  master = thread_master_create ();
239
240  /* Library inits. */
241  signal_init ();
242  cmd_init (1);
243  debug_init ();
244  vty_init ();
245  memory_init ();
246
247  access_list_init ();
248  prefix_list_init ();
249
250  /* OSPFd inits. */
251  ospf_init ();
252  ospf_if_init ();
253  ospf_zebra_init ();
254
255  /* OSPF vty inits. */
256  ospf_vty_init ();
257  ospf_vty_show_init ();
258
259  ospf_route_map_init ();
260#ifdef HAVE_SNMP
261  ospf_snmp_init ();
262#endif /* HAVE_SNMP */
263#ifdef HAVE_OPAQUE_LSA
264  ospf_opaque_init ();
265#endif /* HAVE_OPAQUE_LSA */
266
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  /* Process id file create. */
277  pid_output (pid_file);
278
279  /* Create VTY socket */
280  vty_serv_sock (vty_addr,
281		 vty_port ? vty_port : OSPF_VTY_PORT, OSPF_VTYSH_PATH);
282
283  /* Print banner. */
284  zlog (NULL, LOG_INFO, "OSPFd (%s) starts", ZEBRA_VERSION);
285
286  /* Fetch next active thread. */
287  while (thread_fetch (master, &thread))
288    thread_call (&thread);
289
290  /* Not reached. */
291  exit (0);
292}
293
294