gvpe/src/vped.C

/*
    vped.C -- the main file for gvpe
    Copyright (C) 1998-2002 Ivo Timmermans <ivo@o2w.nl>
                  2000-2002 Guus Sliepen <guus@sliepen.eu.org>
                  2003-2005 Marc Lehmann <gvpe@schmorp.de>
 
    This file is part of GVPE.

    GVPE 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 gvpe; 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 <cstdlib>
#include <locale.h>

#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 (conf.pidfilename)
    remove_pid (conf.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 (_("Built with kernel interface %s/%s.\n"), IFTYPE, IFSUBTYPE);
      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

  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, specify the nodename when starting vped."),
            thisnode ? thisnode : "<unset>");
      exit (EXIT_FAILURE);
    }

  if (detach (do_detach))
    exit (EXIT_SUCCESS);

  setup_signals ();

  if (!network.setup ())
    {
      io_manager::loop ();
      cleanup_and_exit (EXIT_FAILURE);
    }

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

Revision:	1.22
Committed:	Thu Mar 3 16:54:34 2005 UTC (19 years, 2 months ago) by pcg
Content type:	text/plain
Branch:	MAIN
Changes since 1.21:	+5 -3 lines
Log Message:	* empty log message *
#	User	Rev	Content
1	pcg	1.1	/*
2	pcg	1.19	vped.C -- the main file for gvpe
3	pcg	1.1	Copyright (C) 1998-2002 Ivo Timmermans <ivo@o2w.nl>
4			2000-2002 Guus Sliepen <guus@sliepen.eu.org>
5	pcg	1.22	2003-2005 Marc Lehmann <gvpe@schmorp.de>
6	pcg	1.1
7	pcg	1.22	This file is part of GVPE.
8
9			GVPE is free software; you can redistribute it and/or modify
10	pcg	1.1	it under the terms of the GNU General Public License as published by
11			the Free Software Foundation; either version 2 of the License, or
12			(at your option) any later version.
13
14			This program is distributed in the hope that it will be useful,
15			but WITHOUT ANY WARRANTY; without even the implied warranty of
16			MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
17			GNU General Public License for more details.
18
19			You should have received a copy of the GNU General Public License
20	pcg	1.22	along with gvpe; if not, write to the Free Software
21	pcg	1.1	Foundation, Inc. 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
22			*/
23
24			#include "config.h"
25
26			#include <cstdio>
27			#include <cstring>
28	pcg	1.15	#include <cstdlib>
29	pcg	1.21	#include <locale.h>
30	pcg	1.1
31			#include <errno.h>
32			#include <fcntl.h>
33			#include <getopt.h>
34			#include <signal.h>
35			#include <sys/types.h>
36			#include <unistd.h>
37			#include <signal.h>
38			#include <termios.h>
39
40	pcg	1.9	#if HAVE_SYS_MMAN_H
41			# include <sys/mman.h>
42			#endif
43	pcg	1.1
44	pcg	1.8	#include <openssl/err.h>
45	pcg	1.1	#include <openssl/rand.h>
46
47			#include "gettext.h"
48			#include "pidfile.h"
49
50			#include "conf.h"
51			#include "slog.h"
52			#include "util.h"
53	pcg	1.5	#include "vpn.h"
54	pcg	1.3	#include "iom.h"
55	pcg	1.1
56	pcg	1.2	static loglevel llevel = L_NONE;
57
58	pcg	1.1	/* If nonzero, display usage information and exit. */
59			static int show_help;
60
61			/* If nonzero, print the version on standard output and exit. */
62			static int show_version;
63
64			/* If nonzero, disable swapping for this process. */
65			static int do_mlock = 0;
66
67			/* If zero, don't detach from the terminal. */
68			static int do_detach = 1;
69
70			static struct option const long_options[] =
71			{
72			{"config", required_argument, NULL, 'c'},
73			{"help", no_argument, &show_help, 1},
74			{"version", no_argument, &show_version, 1},
75			{"no-detach", no_argument, &do_detach, 0},
76			{"log-level", required_argument, NULL, 'l'},
77			{"mlock", no_argument, &do_mlock, 1},
78			{NULL, 0, NULL, 0}
79			};
80
81			static void
82			usage (int status)
83			{
84			if (status != 0)
85			fprintf (stderr, _("Try `%s --help\' for more information.\n"), get_identity ());
86			else
87			{
88			printf (_("Usage: %s [option]... NODENAME\n\n"), get_identity ());
89			printf (_
90			(" -c, --config=DIR Read configuration options from DIR.\n"
91			" -D, --no-detach Don't fork and detach.\n"
92			" -l, --log-level=LEVEL Set logging level (info, notice, warn are common).\n"
93			" -L, --mlock Lock tinc into main memory.\n"
94			" --help Display this help and exit.\n"
95			" --version Output version information and exit.\n\n"));
96			printf (_("Report bugs to <vpe@plan9.de>.\n"));
97			}
98
99			exit (status);
100			}
101
102			void
103			parse_options (int argc, char argv, char envp)
104			{
105			int r;
106			int option_index = 0;
107
108			while ((r = getopt_long (argc, argv, "-c:DLl:", long_options, &option_index)) != EOF)
109			{
110			switch (r)
111			{
112			case 0: /* long option */
113			break;
114
115			case 1: /* this node name */
116			thisnode = strdup (optarg);
117			break;
118
119			case 'c': /* config file */
120			confbase = strdup (optarg);
121			break;
122
123			case 'D': /* no detach */
124			do_detach = 0;
125			break;
126
127			case 'L': /* lock into memory */
128			do_mlock = 1;
129			break;
130
131			case 'l': /* inc debug level */
132			{
133	pcg	1.2	llevel = string_to_loglevel (optarg);
134	pcg	1.1
135	pcg	1.2	if (llevel == L_NONE)
136	pcg	1.1	slog (L_WARN, "'%s': %s", optarg, UNKNOWN_LOGLEVEL);
137			}
138			break;
139
140			case '?':
141			usage (1);
142
143			default:
144			break;
145			}
146			}
147			}
148
149			/*
150			Close network connections, and terminate neatly
151			*/
152			void cleanup_and_exit(int c)
153			{
154			network.shutdown_all ();
155
156	pcg	1.16	if (conf.pidfilename)
157			remove_pid (conf.pidfilename);
158	pcg	1.1
159			slog (L_INFO, _("terminating with exit code %d"), c);
160
161			exit (c);
162			}
163
164			/*
165			Signal handlers.
166			*/
167			RETSIGTYPE
168			sigterm_handler (int a)
169			{
170			network.events \|= vpn::EVENT_SHUTDOWN;
171	pcg	1.3	network.event.start (0);
172	pcg	1.1	}
173
174			RETSIGTYPE
175			sighup_handler (int a)
176			{
177			network.events \|= vpn::EVENT_RECONNECT;
178	pcg	1.3	network.event.start (0);
179	pcg	1.1	}
180
181			RETSIGTYPE
182			sigusr1_handler (int a)
183			{
184	pcg	1.4	network.dump_status ();
185	pcg	1.1	}
186
187			RETSIGTYPE
188			sigusr2_handler (int a)
189			{
190			}
191
192			void
193			setup_signals (void)
194			{
195			struct sigaction act;
196
197			sigfillset (&act.sa_mask);
198			act.sa_flags = 0;
199
200			act.sa_handler = sighup_handler; sigaction (SIGHUP , &act, NULL);
201			act.sa_handler = sigusr1_handler; sigaction (SIGUSR1, &act, NULL);
202			act.sa_handler = sigusr2_handler; sigaction (SIGUSR2, &act, NULL);
203			act.sa_handler = SIG_IGN; sigaction (SIGCHLD, &act, NULL);
204	pcg	1.6	act.sa_handler = SIG_IGN; sigaction (SIGPIPE, &act, NULL);
205	pcg	1.1	act.sa_flags = SA_RESETHAND;
206			act.sa_handler = sigterm_handler; sigaction (SIGINT , &act, NULL);
207			act.sa_handler = sigterm_handler; sigaction (SIGTERM, &act, NULL);
208			}
209
210			int
211			main (int argc, char argv, char envp)
212			{
213	pcg	1.8	ERR_load_crypto_strings (); // we have the RAM
214
215	pcg	1.1	set_loglevel (L_INFO);
216			set_identity (argv[0]);
217			log_to (LOGTO_SYSLOG \| LOGTO_STDERR);
218
219			setlocale (LC_ALL, "");
220			bindtextdomain (PACKAGE, LOCALEDIR);
221			textdomain (PACKAGE);
222
223			parse_options (argc, argv, envp);
224
225			if (show_version)
226			{
227	pcg	1.7	printf (_("%s version %s (built %s %s, protocol %d.%d)\n"), get_identity (),
228	pcg	1.1	VERSION, __DATE__, __TIME__, PROTOCOL_MAJOR, PROTOCOL_MINOR);
229	pcg	1.13	printf (_("Built with kernel interface %s/%s.\n"), IFTYPE, IFSUBTYPE);
230	pcg	1.1	printf (_
231			("Copyright (C) 2003 Marc Lehmann <vpe@plan9.de> and others.\n"
232			"See the AUTHORS file for a complete list.\n\n"
233			"tinc comes with ABSOLUTELY NO WARRANTY. This is free software,\n"
234			"and you are welcome to redistribute it under certain conditions;\n"
235			"see the file COPYING for details.\n"));
236
237			return 0;
238			}
239
240			if (show_help)
241			usage (0);
242
243			log_to (LOGTO_SYSLOG \| LOGTO_STDERR);
244
245			/* Lock all pages into memory if requested */
246
247	pcg	1.10	#if HAVE_MLOCKALL && HAVE_SYS_MMAN_H && _POSIX_MEMLOCK
248	pcg	1.1	if (do_mlock)
249			if (mlockall (MCL_CURRENT \| MCL_FUTURE))
250			slog (L_ERR, _("system call `%s' failed: %s"), "mlockall", strerror (errno));
251			#endif
252
253	pcg	1.17	conf.read_config (true);
254	pcg	1.1
255	pcg	1.2	set_loglevel (llevel != L_NONE ? llevel : conf.llevel);
256
257	pcg	1.1	RAND_load_file ("/dev/urandom", 1024);
258
259	pcg	1.3	if (!THISNODE)
260	pcg	1.1	{
261	pcg	1.15	slog (L_ERR, _("current node not set, or node '%s' not found in configfile, specify the nodename when starting vped."),
262	pcg	1.1	thisnode ? thisnode : "<unset>");
263	pcg	1.15	exit (EXIT_FAILURE);
264	pcg	1.1	}
265
266			if (detach (do_detach))
267	pcg	1.15	exit (EXIT_SUCCESS);
268	pcg	1.1
269			setup_signals ();
270
271			if (!network.setup ())
272			{
273	pcg	1.20	io_manager::loop ();
274	pcg	1.15	cleanup_and_exit (EXIT_FAILURE);
275	pcg	1.1	}
276
277			slog (L_ERR, _("unable to setup network, unrecoverable error, exiting."));
278	pcg	1.15	cleanup_and_exit (EXIT_FAILURE);
279	pcg	1.1	}
280