gvpe/src/vped.C

/*
    vped.C -- the main file for vped
    Copyright (C) 1998-2002 Ivo Timmermans <ivo@o2w.nl>
                  2000-2002 Guus Sliepen <guus@sliepen.eu.org>
                  2003      Marc Lehmann <pcg@goof.com>
 
    This program is free software; you can redistribute it and/or modify
    it under the terms of the GNU General Public License as published by
    the Free Software Foundation; either version 2 of the License, or
    (at your option) any later version.
 
    This program is distributed in the hope that it will be useful,
    but WITHOUT ANY WARRANTY; without even the implied warranty of
    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
    GNU General Public License for more details.
 
    You should have received a copy of the GNU General Public License
    along with this program; if not, write to the Free Software
    Foundation, Inc. 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA
*/

#include "config.h"

#include <cstdio>
#include <cstring>

#include <errno.h>
#include <fcntl.h>
#include <getopt.h>
#include <signal.h>
#include <sys/types.h>
#include <unistd.h>
#include <signal.h>
#include <termios.h>

#if HAVE_SYS_MMAN_H
# include <sys/mman.h>
#endif

#include <openssl/err.h>
#include <openssl/rand.h>

#include "gettext.h"
#include "pidfile.h"

#include "conf.h"
#include "slog.h"
#include "util.h"
#include "vpn.h"
#include "iom.h"

static loglevel llevel = L_NONE;

/* If nonzero, display usage information and exit. */
static int show_help;

/* If nonzero, print the version on standard output and exit.  */
static int show_version;

/* If nonzero, disable swapping for this process. */
static int do_mlock = 0;

/* If zero, don't detach from the terminal. */
static int do_detach = 1;

static struct option const long_options[] =
    {
      {"config", required_argument, NULL, 'c'},
      {"help", no_argument, &show_help, 1},
      {"version", no_argument, &show_version, 1},
      {"no-detach", no_argument, &do_detach, 0},
      {"log-level", required_argument, NULL, 'l'},
      {"mlock", no_argument, &do_mlock, 1},
      {NULL, 0, NULL, 0}
    };

static void
usage (int status)
{
  if (status != 0)
    fprintf (stderr, _("Try `%s --help\' for more information.\n"), get_identity ());
  else
    {
      printf (_("Usage: %s [option]... NODENAME\n\n"), get_identity ());
      printf (_
              ("  -c, --config=DIR           Read configuration options from DIR.\n"
               "  -D, --no-detach            Don't fork and detach.\n"
               "  -l, --log-level=LEVEL      Set logging level (info, notice, warn are common).\n"
               "  -L, --mlock                Lock tinc into main memory.\n"
               "      --help                 Display this help and exit.\n"
               "      --version              Output version information and exit.\n\n"));
      printf (_("Report bugs to <vpe@plan9.de>.\n"));
    }

  exit (status);
}

void
parse_options (int argc, char **argv, char **envp)
{
  int r;
  int option_index = 0;

  while ((r = getopt_long (argc, argv, "-c:DLl:", long_options, &option_index)) != EOF)
    {
      switch (r)
        {
        case 0:         /* long option */
          break;

        case 1:         /* this node name */
          thisnode = strdup (optarg);
          break;

        case 'c':               /* config file */
          confbase = strdup (optarg);
          break;

        case 'D':               /* no detach */
          do_detach = 0;
          break;

        case 'L':               /* lock into memory */
          do_mlock = 1;
          break;

        case 'l':               /* inc debug level */
          {
            llevel = string_to_loglevel (optarg);

            if (llevel == L_NONE)
              slog (L_WARN, "'%s': %s", optarg, UNKNOWN_LOGLEVEL);
          }
          break;

        case '?':
          usage (1);

        default:
          break;
        }
    }
}

/*
  Close network connections, and terminate neatly
*/
void cleanup_and_exit(int c)
{
  network.shutdown_all ();

  if (pidfilename)
    remove_pid (pidfilename);

  slog (L_INFO, _("terminating with exit code %d"), c);

  exit (c);
}

/*
  Signal handlers.
*/
RETSIGTYPE
sigterm_handler (int a)
{
  network.events |= vpn::EVENT_SHUTDOWN;
  network.event.start (0);
}

RETSIGTYPE
sighup_handler (int a)
{
  network.events |= vpn::EVENT_RECONNECT;
  network.event.start (0);
}

RETSIGTYPE
sigusr1_handler (int a)
{
  network.dump_status ();
}

RETSIGTYPE
sigusr2_handler (int a)
{
}

void
setup_signals (void)
{
  struct sigaction act;

  sigfillset (&act.sa_mask);
  act.sa_flags = 0;

  act.sa_handler = sighup_handler;  sigaction (SIGHUP , &act, NULL);
  act.sa_handler = sigusr1_handler; sigaction (SIGUSR1, &act, NULL);
  act.sa_handler = sigusr2_handler; sigaction (SIGUSR2, &act, NULL);
  act.sa_handler = SIG_IGN;         sigaction (SIGCHLD, &act, NULL);
  act.sa_handler = SIG_IGN;         sigaction (SIGPIPE, &act, NULL);
  act.sa_flags = SA_RESETHAND;
  act.sa_handler = sigterm_handler; sigaction (SIGINT , &act, NULL);
  act.sa_handler = sigterm_handler; sigaction (SIGTERM, &act, NULL);
}

int
main (int argc, char **argv, char **envp)
{
  ERR_load_crypto_strings (); // we have the RAM

  set_loglevel (L_INFO);
  set_identity (argv[0]);
  log_to (LOGTO_SYSLOG | LOGTO_STDERR);

  setlocale (LC_ALL, "");
  bindtextdomain (PACKAGE, LOCALEDIR);
  textdomain (PACKAGE);

  parse_options (argc, argv, envp);

  if (show_version)
    {
      printf (_("%s version %s (built %s %s, protocol %d.%d)\n"), get_identity (),
              VERSION, __DATE__, __TIME__, PROTOCOL_MAJOR, PROTOCOL_MINOR);
      printf (_
              ("Copyright (C) 2003 Marc Lehmann <vpe@plan9.de> and others.\n"
               "See the AUTHORS file for a complete list.\n\n"
               "tinc comes with ABSOLUTELY NO WARRANTY.  This is free software,\n"
               "and you are welcome to redistribute it under certain conditions;\n"
               "see the file COPYING for details.\n"));

      return 0;
    }

  if (show_help)
    usage (0);

  log_to (LOGTO_SYSLOG | LOGTO_STDERR);

  /* Lock all pages into memory if requested */

#if HAVE_MLOCKALL && HAVE_SYS_MMAN_H && _POSIX_MEMLOCK
  if (do_mlock)
    if (mlockall (MCL_CURRENT | MCL_FUTURE))
      slog (L_ERR, _("system call `%s' failed: %s"), "mlockall", strerror (errno));
#endif

  make_names ();
  conf.read_config (true);

  set_loglevel (llevel != L_NONE ? llevel : conf.llevel);

  RAND_load_file ("/dev/urandom", 1024);

  if (!THISNODE)
    {
      slog (L_ERR, _("current node not set, or node '%s' not found in configfile, use the -n switch when starting vped."),
            thisnode ? thisnode : "<unset>");
      exit (1);
    }

  if (detach (do_detach))
    exit (0);

  setup_signals ();

  if (!network.setup ())
    {
      iom.loop ();
      cleanup_and_exit (1);
    }

  slog (L_ERR, _("unable to setup network, unrecoverable error, exiting."));
  cleanup_and_exit (1);
}

Revision:	1.12
Committed:	Thu Oct 16 14:12:00 2003 UTC (20 years, 7 months ago) by pcg
Content type:	text/plain
Branch:	MAIN
Changes since 1.11:	+0 -2 lines
Log Message:	* empty log message *
#	User	Rev	Content
1	pcg	1.1	/*
2			vped.C -- the main file for vped
3			Copyright (C) 1998-2002 Ivo Timmermans <ivo@o2w.nl>
4			2000-2002 Guus Sliepen <guus@sliepen.eu.org>
5	pcg	1.11	2003 Marc Lehmann <pcg@goof.com>
6	pcg	1.1
7			This program is free software; you can redistribute it and/or modify
8			it under the terms of the GNU General Public License as published by
9			the Free Software Foundation; either version 2 of the License, or
10			(at your option) any later version.
11
12			This program is distributed in the hope that it will be useful,
13			but WITHOUT ANY WARRANTY; without even the implied warranty of
14			MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
15			GNU General Public License for more details.
16
17			You should have received a copy of the GNU General Public License
18			along with this program; if not, write to the Free Software
19			Foundation, Inc. 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
20			*/
21
22			#include "config.h"
23
24			#include <cstdio>
25			#include <cstring>
26
27			#include <errno.h>
28			#include <fcntl.h>
29			#include <getopt.h>
30			#include <signal.h>
31			#include <sys/types.h>
32			#include <unistd.h>
33			#include <signal.h>
34			#include <termios.h>
35
36	pcg	1.9	#if HAVE_SYS_MMAN_H
37			# include <sys/mman.h>
38			#endif
39	pcg	1.1
40	pcg	1.8	#include <openssl/err.h>
41	pcg	1.1	#include <openssl/rand.h>
42
43			#include "gettext.h"
44			#include "pidfile.h"
45
46			#include "conf.h"
47			#include "slog.h"
48			#include "util.h"
49	pcg	1.5	#include "vpn.h"
50	pcg	1.3	#include "iom.h"
51	pcg	1.1
52	pcg	1.2	static loglevel llevel = L_NONE;
53
54	pcg	1.1	/* If nonzero, display usage information and exit. */
55			static int show_help;
56
57			/* If nonzero, print the version on standard output and exit. */
58			static int show_version;
59
60			/* If nonzero, disable swapping for this process. */
61			static int do_mlock = 0;
62
63			/* If zero, don't detach from the terminal. */
64			static int do_detach = 1;
65
66			static struct option const long_options[] =
67			{
68			{"config", required_argument, NULL, 'c'},
69			{"help", no_argument, &show_help, 1},
70			{"version", no_argument, &show_version, 1},
71			{"no-detach", no_argument, &do_detach, 0},
72			{"log-level", required_argument, NULL, 'l'},
73			{"mlock", no_argument, &do_mlock, 1},
74			{NULL, 0, NULL, 0}
75			};
76
77			static void
78			usage (int status)
79			{
80			if (status != 0)
81			fprintf (stderr, _("Try `%s --help\' for more information.\n"), get_identity ());
82			else
83			{
84			printf (_("Usage: %s [option]... NODENAME\n\n"), get_identity ());
85			printf (_
86			(" -c, --config=DIR Read configuration options from DIR.\n"
87			" -D, --no-detach Don't fork and detach.\n"
88			" -l, --log-level=LEVEL Set logging level (info, notice, warn are common).\n"
89			" -L, --mlock Lock tinc into main memory.\n"
90			" --help Display this help and exit.\n"
91			" --version Output version information and exit.\n\n"));
92			printf (_("Report bugs to <vpe@plan9.de>.\n"));
93			}
94
95			exit (status);
96			}
97
98			void
99			parse_options (int argc, char argv, char envp)
100			{
101			int r;
102			int option_index = 0;
103
104			while ((r = getopt_long (argc, argv, "-c:DLl:", long_options, &option_index)) != EOF)
105			{
106			switch (r)
107			{
108			case 0: /* long option */
109			break;
110
111			case 1: /* this node name */
112			thisnode = strdup (optarg);
113			break;
114
115			case 'c': /* config file */
116			confbase = strdup (optarg);
117			break;
118
119			case 'D': /* no detach */
120			do_detach = 0;
121			break;
122
123			case 'L': /* lock into memory */
124			do_mlock = 1;
125			break;
126
127			case 'l': /* inc debug level */
128			{
129	pcg	1.2	llevel = string_to_loglevel (optarg);
130	pcg	1.1
131	pcg	1.2	if (llevel == L_NONE)
132	pcg	1.1	slog (L_WARN, "'%s': %s", optarg, UNKNOWN_LOGLEVEL);
133			}
134			break;
135
136			case '?':
137			usage (1);
138
139			default:
140			break;
141			}
142			}
143			}
144
145			/*
146			Close network connections, and terminate neatly
147			*/
148			void cleanup_and_exit(int c)
149			{
150			network.shutdown_all ();
151
152			if (pidfilename)
153			remove_pid (pidfilename);
154
155			slog (L_INFO, _("terminating with exit code %d"), c);
156
157			exit (c);
158			}
159
160			/*
161			Signal handlers.
162			*/
163			RETSIGTYPE
164			sigterm_handler (int a)
165			{
166			network.events \|= vpn::EVENT_SHUTDOWN;
167	pcg	1.3	network.event.start (0);
168	pcg	1.1	}
169
170			RETSIGTYPE
171			sighup_handler (int a)
172			{
173			network.events \|= vpn::EVENT_RECONNECT;
174	pcg	1.3	network.event.start (0);
175	pcg	1.1	}
176
177			RETSIGTYPE
178			sigusr1_handler (int a)
179			{
180	pcg	1.4	network.dump_status ();
181	pcg	1.1	}
182
183			RETSIGTYPE
184			sigusr2_handler (int a)
185			{
186			}
187
188			void
189			setup_signals (void)
190			{
191			struct sigaction act;
192
193			sigfillset (&act.sa_mask);
194			act.sa_flags = 0;
195
196			act.sa_handler = sighup_handler; sigaction (SIGHUP , &act, NULL);
197			act.sa_handler = sigusr1_handler; sigaction (SIGUSR1, &act, NULL);
198			act.sa_handler = sigusr2_handler; sigaction (SIGUSR2, &act, NULL);
199			act.sa_handler = SIG_IGN; sigaction (SIGCHLD, &act, NULL);
200	pcg	1.6	act.sa_handler = SIG_IGN; sigaction (SIGPIPE, &act, NULL);
201	pcg	1.1	act.sa_flags = SA_RESETHAND;
202			act.sa_handler = sigterm_handler; sigaction (SIGINT , &act, NULL);
203			act.sa_handler = sigterm_handler; sigaction (SIGTERM, &act, NULL);
204			}
205
206			int
207			main (int argc, char argv, char envp)
208			{
209	pcg	1.8	ERR_load_crypto_strings (); // we have the RAM
210
211	pcg	1.1	set_loglevel (L_INFO);
212			set_identity (argv[0]);
213			log_to (LOGTO_SYSLOG \| LOGTO_STDERR);
214
215			setlocale (LC_ALL, "");
216			bindtextdomain (PACKAGE, LOCALEDIR);
217			textdomain (PACKAGE);
218
219			parse_options (argc, argv, envp);
220
221			if (show_version)
222			{
223	pcg	1.7	printf (_("%s version %s (built %s %s, protocol %d.%d)\n"), get_identity (),
224	pcg	1.1	VERSION, __DATE__, __TIME__, PROTOCOL_MAJOR, PROTOCOL_MINOR);
225			printf (_
226			("Copyright (C) 2003 Marc Lehmann <vpe@plan9.de> and others.\n"
227			"See the AUTHORS file for a complete list.\n\n"
228			"tinc comes with ABSOLUTELY NO WARRANTY. This is free software,\n"
229			"and you are welcome to redistribute it under certain conditions;\n"
230			"see the file COPYING for details.\n"));
231
232			return 0;
233			}
234
235			if (show_help)
236			usage (0);
237
238			log_to (LOGTO_SYSLOG \| LOGTO_STDERR);
239
240			/* Lock all pages into memory if requested */
241
242	pcg	1.10	#if HAVE_MLOCKALL && HAVE_SYS_MMAN_H && _POSIX_MEMLOCK
243	pcg	1.1	if (do_mlock)
244			if (mlockall (MCL_CURRENT \| MCL_FUTURE))
245			slog (L_ERR, _("system call `%s' failed: %s"), "mlockall", strerror (errno));
246			#endif
247
248			make_names ();
249			conf.read_config (true);
250
251	pcg	1.2	set_loglevel (llevel != L_NONE ? llevel : conf.llevel);
252
253	pcg	1.1	RAND_load_file ("/dev/urandom", 1024);
254
255	pcg	1.3	if (!THISNODE)
256	pcg	1.1	{
257			slog (L_ERR, _("current node not set, or node '%s' not found in configfile, use the -n switch when starting vped."),
258			thisnode ? thisnode : "<unset>");
259			exit (1);
260			}
261
262			if (detach (do_detach))
263			exit (0);
264
265			setup_signals ();
266
267			if (!network.setup ())
268			{
269	pcg	1.3	iom.loop ();
270	pcg	1.1	cleanup_and_exit (1);
271			}
272
273			slog (L_ERR, _("unable to setup network, unrecoverable error, exiting."));
274			cleanup_and_exit (1);
275			}
276