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 "version.h"
26#include "getopt.h"
27#include "vector.h"
28#include "vty.h"
29#include "command.h"
30#include "thread.h"
31#include "log.h"
32#include "prefix.h"
33#include "if.h"
34
35#include "ripngd/ripngd.h"
36
37/* Configuration filename and directory. */
38char config_current[] = RIPNG_DEFAULT_CONFIG;
39char config_default[] = SYSCONFDIR RIPNG_DEFAULT_CONFIG;
40
41/* RIPngd options. */
42struct option longopts[] =
43{
44  { "daemon",      no_argument,       NULL, 'd'},
45  { "config_file", required_argument, NULL, 'f'},
46  { "pid_file",    required_argument, NULL, 'i'},
47  { "log_mode",    no_argument,       NULL, 'l'},
48  { "help",        no_argument,       NULL, 'h'},
49  { "vty_addr",    required_argument, NULL, 'A'},
50  { "vty_port",    required_argument, NULL, 'P'},
51  { "retain",      no_argument,       NULL, 'r'},
52  { "version",     no_argument,       NULL, 'v'},
53  { 0 }
54};
55
56/* RIPngd program name */
57
58/* Route retain mode flag. */
59int retain_mode = 0;
60
61/* Master of threads. */
62struct thread_master *master;
63
64/* Process ID saved for use by init system */
65char *pid_file = PATH_RIPNGD_PID;
66
67/* Help information display. */
68static void
69usage (char *progname, int status)
70{
71  if (status != 0)
72    fprintf (stderr, "Try `%s --help' for more information.\n", progname);
73  else
74    {
75      printf ("Usage : %s [OPTION...]\n\
76Daemon which manages RIPng.\n\n\
77-d, --daemon       Runs in daemon mode\n\
78-f, --config_file  Set configuration file name\n\
79-i, --pid_file     Set process identifier file name\n\
80-l. --log_mode     Set verbose log mode flag\n\
81-A, --vty_addr     Set vty's bind address\n\
82-P, --vty_port     Set vty's port number\n\
83-r, --retain       When program terminates, retain added route by ripngd.\n\
84-v, --version      Print program version\n\
85-h, --help         Display this help and exit\n\
86\n\
87Report bugs to %s\n", progname, ZEBRA_BUG_ADDRESS);
88    }
89  exit (status);
90}
91
92/* SIGHUP handler. */
93void
94sighup (int sig)
95{
96  zlog (NULL, LOG_INFO, "SIGHUP received");
97}
98
99/* SIGINT handler. */
100void
101sigint (int sig)
102{
103  zlog (NULL, LOG_INFO, "Terminating on signal");
104
105  if (! retain_mode)
106    ripng_terminate ();
107
108  exit (0);
109}
110
111/* SIGUSR1 handler. */
112void
113sigusr1 (int sig)
114{
115  zlog_rotate (NULL);
116}
117
118/* Signale wrapper. */
119RETSIGTYPE *
120signal_set (int signo, void (*func)(int))
121{
122  int ret;
123  struct sigaction sig;
124  struct sigaction osig;
125
126  sig.sa_handler = func;
127  sigemptyset (&sig.sa_mask);
128  sig.sa_flags = 0;
129#ifdef SA_RESTART
130  sig.sa_flags |= SA_RESTART;
131#endif /* SA_RESTART */
132
133  ret = sigaction (signo, &sig, &osig);
134
135  if (ret < 0)
136    return (SIG_ERR);
137  else
138    return (osig.sa_handler);
139}
140
141/* Initialization of signal handles. */
142void
143signal_init ()
144{
145  signal_set (SIGHUP, sighup);
146  signal_set (SIGINT, sigint);
147  signal_set (SIGTERM, sigint);
148  signal_set (SIGPIPE, SIG_IGN);
149  signal_set (SIGUSR1, sigusr1);
150}
151
152/* RIPngd main routine. */
153int
154main (int argc, char **argv)
155{
156  char *p;
157  char *vty_addr = NULL;
158  int vty_port = 0;
159  int daemon_mode = 0;
160  char *config_file = NULL;
161  char *progname;
162  struct thread thread;
163
164  /* Set umask before anything for security */
165  umask (0027);
166
167  /* get program name */
168  progname = ((p = strrchr (argv[0], '/')) ? ++p : argv[0]);
169
170  zlog_default = openzlog(progname, ZLOG_NOLOG, ZLOG_RIPNG,
171			  LOG_CONS|LOG_NDELAY|LOG_PID, LOG_DAEMON);
172
173  while (1)
174    {
175      int opt;
176
177      opt = getopt_long (argc, argv, "dlf:hA:P:v", longopts, 0);
178
179      if (opt == EOF)
180	break;
181
182      switch (opt)
183	{
184	case 0:
185	  break;
186	case 'd':
187	  daemon_mode = 1;
188	  break;
189	case 'l':
190	  /* log_mode = 1; */
191	  break;
192	case 'f':
193	  config_file = optarg;
194	  break;
195	case 'A':
196	  vty_addr = optarg;
197	  break;
198        case 'i':
199          pid_file = optarg;
200          break;
201	case 'P':
202	  vty_port = atoi (optarg);
203	  break;
204	case 'r':
205	  retain_mode = 1;
206	  break;
207	case 'v':
208	  print_version (progname);
209	  exit (0);
210	  break;
211	case 'h':
212	  usage (progname, 0);
213	  break;
214	default:
215	  usage (progname, 1);
216	  break;
217	}
218    }
219
220  master = thread_master_create ();
221
222  /* Library inits. */
223  signal_init ();
224  cmd_init (1);
225  vty_init ();
226
227  /* RIPngd inits. */
228  ripng_init ();
229  zebra_init ();
230  sort_node ();
231
232  /* Get configuration file. */
233  vty_read_config (config_file, config_current, config_default);
234
235  /* Change to the daemon program. */
236  if (daemon_mode)
237    daemon (0, 0);
238
239  /* Create VTY socket */
240  vty_serv_sock (vty_addr,
241		 vty_port ? vty_port : RIPNG_VTY_PORT, RIPNG_VTYSH_PATH);
242
243  /* Process id file create. */
244  pid_output (pid_file);
245
246  /* Fetch next active thread. */
247  while (thread_fetch (master, &thread))
248    thread_call (&thread);
249
250  /* Not reached. */
251  exit (0);
252}
253