1/*
2 * Copyright (C) 1999 Yasuhiro Ohara
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
18 * Free Software Foundation, Inc., 59 Temple Place - Suite 330,
19 * Boston, MA 02111-1307, USA.
20 */
21
22#include <zebra.h>
23#include "getopt.h"
24#include "thread.h"
25#include "log.h"
26#include "version.h"
27#include "command.h"
28#include "vty.h"
29#include "memory.h"
30
31#include "ospf6d.h"
32#include "ospf6_network.h"
33
34void ospf6_init ();
35void ospf6_terminate ();
36void nexthop_init ();
37int ospf6_receive (struct thread *);
38
39extern int ospf6_sock;
40
41/* Default configuration file name for ospf6d. */
42#define OSPF6_DEFAULT_CONFIG       "ospf6d.conf"
43/* Default port values. */
44#define OSPF6_VTY_PORT             2606
45
46/* ospf6d options, we use GNU getopt library. */
47struct option longopts[] =
48{
49  { "daemon",      no_argument,       NULL, 'd'},
50  { "config_file", required_argument, NULL, 'f'},
51  { "pid_file",    required_argument, NULL, 'i'},
52  { "vty_addr",    required_argument, NULL, 'A'},
53  { "vty_port",    required_argument, NULL, 'P'},
54  { "version",     no_argument,       NULL, 'v'},
55  { "help",        no_argument,       NULL, 'h'},
56  { 0 }
57};
58
59/* Configuration file and directory. */
60char config_current[] = OSPF6_DEFAULT_CONFIG;
61char config_default[] = SYSCONFDIR OSPF6_DEFAULT_CONFIG;
62
63/* ospf6d program name. */
64
65/* is daemon? */
66int daemon_mode = 0;
67
68/* Master of threads. */
69struct thread_master *master;
70
71/* Process ID saved for use by init system */
72char *pid_file = PATH_OSPF6D_PID;
73
74/* for reload */
75char _cwd[64];
76char _progpath[64];
77int _argc;
78char **_argv;
79char **_envp;
80
81/* Help information display. */
82static void
83usage (char *progname, int status)
84{
85  if (status != 0)
86    fprintf (stderr, "Try `%s --help' for more information.\n", progname);
87  else
88    {
89      printf ("Usage : %s [OPTION...]\n\n\
90Daemon which manages OSPF version 3.\n\n\
91-d, --daemon       Runs in daemon mode\n\
92-f, --config_file  Set configuration file name\n\
93-i, --pid_file     Set process identifier file name\n\
94-A, --vty_addr     Set vty's bind address\n\
95-P, --vty_port     Set vty's port number\n\
96-v, --version      Print program version\n\
97-h, --help         Display this help and exit\n\
98\n\
99Report bugs to yasu@sfc.wide.ad.jp\n", progname);
100    }
101
102  exit (status);
103}
104
105
106void
107_reload ()
108{
109  zlog_notice ("OSPF6d (Zebra-%s ospf6d-%s) reloaded",
110               ZEBRA_VERSION, OSPF6_DAEMON_VERSION);
111  ospf6_zebra_finish ();
112  vty_finish ();
113  execve (_progpath, _argv, _envp);
114}
115
116void
117terminate (int i)
118{
119  ospf6_delete (ospf6);
120  unlink (PATH_OSPF6D_PID);
121  zlog_notice ("OSPF6d (Zebra-%s ospf6d-%s) terminated",
122               ZEBRA_VERSION, OSPF6_DAEMON_VERSION);
123  exit (i);
124}
125
126/* SIGHUP handler. */
127void
128sighup (int sig)
129{
130  zlog_info ("SIGHUP received");
131  _reload ();
132}
133
134/* SIGINT handler. */
135void
136sigint (int sig)
137{
138  zlog_info ("SIGINT received");
139  terminate (0);
140}
141
142/* SIGTERM handler. */
143void
144sigterm (int sig)
145{
146  zlog_info ("SIGTERM received");
147  terminate (0);
148}
149
150/* SIGUSR1 handler. */
151void
152sigusr1 (int sig)
153{
154  zlog_info ("SIGUSR1 received");
155  zlog_rotate (NULL);
156}
157
158/* Signale wrapper. */
159RETSIGTYPE *
160signal_set (int signo, void (*func)(int))
161{
162  int ret;
163  struct sigaction sig;
164  struct sigaction osig;
165
166  sig.sa_handler = func;
167  sigemptyset (&sig.sa_mask);
168  sig.sa_flags = 0;
169#ifdef SA_RESTART
170  sig.sa_flags |= SA_RESTART;
171#endif /* SA_RESTART */
172
173  ret = sigaction (signo, &sig, &osig);
174
175  if (ret < 0)
176    return (SIG_ERR);
177  else
178    return (osig.sa_handler);
179}
180
181/* Initialization of signal handles. */
182void
183signal_init ()
184{
185  signal_set (SIGHUP, sighup);
186  signal_set (SIGINT, sigint);
187  signal_set (SIGTERM, sigterm);
188  signal_set (SIGPIPE, SIG_IGN);
189#ifdef SIGTSTP
190  signal_set (SIGTSTP, SIG_IGN);
191#endif
192#ifdef SIGTTIN
193  signal_set (SIGTTIN, SIG_IGN);
194#endif
195#ifdef SIGTTOU
196  signal_set (SIGTTOU, SIG_IGN);
197#endif
198  signal_set (SIGUSR1, sigusr1);
199}
200
201/* Main routine of ospf6d. Treatment of argument and start ospf finite
202   state machine is handled here. */
203int
204main (int argc, char *argv[], char *envp[])
205{
206  char *p;
207  int opt;
208  char *vty_addr = NULL;
209  int vty_port = 0;
210  char *config_file = NULL;
211  char *progname;
212  struct thread thread;
213  int flag;
214
215  /* Set umask before anything for security */
216  umask (0027);
217
218  /* Preserve name of myself. */
219  progname = ((p = strrchr (argv[0], '/')) ? ++p : argv[0]);
220
221  /* for reload */
222  _argc = argc;
223  _argv = argv;
224  _envp = envp;
225  getcwd (_cwd, sizeof (_cwd));
226  if (*argv[0] == '.')
227    snprintf (_progpath, sizeof (_progpath), "%s/%s", _cwd, _argv[0]);
228  else
229    snprintf (_progpath, sizeof (_progpath), "%s", argv[0]);
230
231  /* Command line argument treatment. */
232  while (1)
233    {
234      opt = getopt_long (argc, argv, "df:hp:A:P:v", longopts, 0);
235
236      if (opt == EOF)
237        break;
238
239      switch (opt)
240        {
241        case 0:
242          break;
243        case 'd':
244          daemon_mode = 1;
245          break;
246        case 'f':
247          config_file = optarg;
248          break;
249        case 'A':
250          vty_addr = optarg;
251          break;
252        case 'i':
253          pid_file = optarg;
254          break;
255        case 'P':
256          vty_port = atoi (optarg);
257          break;
258        case 'v':
259          print_version (progname);
260          exit (0);
261          break;
262        case 'h':
263          usage (progname, 0);
264          break;
265        default:
266          usage (progname, 1);
267          break;
268        }
269    }
270
271  /* thread master */
272  master = thread_master_create ();
273
274  /* Initializations. */
275  if (! daemon_mode)
276    flag = ZLOG_STDOUT;
277  else
278    flag = 0;
279
280  zlog_default = openzlog (progname, flag, ZLOG_OSPF6,
281			   LOG_CONS|LOG_NDELAY|LOG_PERROR|LOG_PID,
282			   LOG_DAEMON);
283  signal_init ();
284  cmd_init (1);
285  vty_init ();
286  ospf6_init ();
287  memory_init ();
288  sort_node ();
289
290  /* parse config file */
291  vty_read_config (config_file, config_current, config_default);
292
293  if (daemon_mode)
294    daemon (0, 0);
295
296  /* pid file create */
297#if 0
298  pid_output_lock (pid_file);
299#else
300  pid_output (pid_file);
301#endif
302
303  /* Make ospf protocol socket. */
304  ospf6_serv_sock ();
305  thread_add_read (master, ospf6_receive, NULL, ospf6_sock);
306
307  /* Make ospf vty socket. */
308  vty_serv_sock (vty_addr,
309		 vty_port ? vty_port : OSPF6_VTY_PORT, OSPF6_VTYSH_PATH);
310
311  /* Print start message */
312  zlog_notice ("OSPF6d (Zebra-%s ospf6d-%s) starts",
313               ZEBRA_VERSION, OSPF6_DAEMON_VERSION);
314
315  /* Start finite state machine, here we go! */
316  while (thread_fetch (master, &thread))
317    thread_call (&thread);
318
319  /* Log in case thread failed */
320  zlog_warn ("Thread failed");
321  terminate (0);
322
323  /* Not reached. */
324  exit (0);
325}
326
327