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/* |
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gvpe.C -- the main file for gvpe |
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Copyright (C) 1998-2002 Ivo Timmermans <ivo@o2w.nl> |
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2000-2002 Guus Sliepen <guus@sliepen.eu.org> |
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2003-2013 Marc Lehmann <gvpe@schmorp.de> |
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|
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This file is part of GVPE. |
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|
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GVPE is free software; you can redistribute it and/or modify it |
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under the terms of the GNU General Public License as published by the |
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Free Software Foundation; either version 3 of the License, or (at your |
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option) any later version. |
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|
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This program is distributed in the hope that it will be useful, but |
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WITHOUT ANY WARRANTY; without even the implied warranty of |
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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU General |
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Public License for more details. |
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|
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You should have received a copy of the GNU General Public License along |
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with this program; if not, see <http://www.gnu.org/licenses/>. |
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|
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Additional permission under GNU GPL version 3 section 7 |
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|
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If you modify this Program, or any covered work, by linking or |
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combining it with the OpenSSL project's OpenSSL library (or a modified |
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version of that library), containing parts covered by the terms of the |
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OpenSSL or SSLeay licenses, the licensors of this Program grant you |
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additional permission to convey the resulting work. Corresponding |
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Source for a non-source form of such a combination shall include the |
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source code for the parts of OpenSSL used as well as that of the |
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covered work. |
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*/ |
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|
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#include "config.h" |
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|
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#include <cstdio> |
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#include <cstring> |
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#include <cstdlib> |
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|
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#include <errno.h> |
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#include <fcntl.h> |
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#include <getopt.h> |
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#include <signal.h> |
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#include <sys/types.h> |
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#include <sys/stat.h> |
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#include <unistd.h> |
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#include <signal.h> |
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#include <termios.h> |
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|
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#if HAVE_SYS_MMAN_H |
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# include <sys/mman.h> |
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#endif |
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|
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#include <openssl/err.h> |
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#include <openssl/rand.h> |
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|
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#include "gettext.h" |
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#include "pidfile.h" |
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|
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#include "conf.h" |
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#include "slog.h" |
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#include "util.h" |
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#include "vpn.h" |
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#include "ev_cpp.h" |
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#include "hkdf.h" |
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|
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static loglevel llevel = L_NONE; |
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|
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/* If nonzero, display usage information and exit. */ |
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static int show_help; |
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|
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/* If nonzero, print the version on standard output and exit. */ |
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static int show_version; |
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|
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/* If nonzero, disable swapping for this process. */ |
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static int do_mlock = 0; |
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|
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/* If zero, don't detach from the terminal. */ |
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static int do_detach = 1; |
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|
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static struct option const long_options[] = |
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{ |
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{"config", required_argument, NULL, 'c'}, |
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{"help", no_argument, &show_help, 1}, |
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{"version", no_argument, &show_version, 1}, |
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{"no-detach", no_argument, &do_detach, 0}, |
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{"log-level", required_argument, NULL, 'l'}, |
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{"mlock", no_argument, &do_mlock, 1}, |
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{NULL, 0, NULL, 0} |
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}; |
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|
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static void |
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usage (int status) |
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{ |
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if (status != 0) |
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fprintf (stderr, _("Try `%s --help\' for more information.\n"), get_identity ()); |
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else |
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{ |
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printf (_("Usage: %s [option]... NODENAME\n\n"), get_identity ()); |
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printf (_ |
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(" -c, --config=DIR Read configuration options from DIR.\n" |
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" -D, --no-detach Don't fork and detach.\n" |
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" -l, --log-level=LEVEL Set logging level (info, notice, warn are common).\n" |
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" -L, --mlock Lock gvpe into main memory.\n" |
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" --help Display this help and exit.\n" |
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" --version Output version information and exit.\n\n")); |
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printf (_("Report bugs to <gvpe@schmorp.de>.\n")); |
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} |
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|
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exit (status); |
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} |
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|
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static void |
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parse_options (int argc, char **argv, char **envp) |
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{ |
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int r; |
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int option_index = 0; |
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|
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while ((r = getopt_long (argc, argv, "c:DLl:", long_options, &option_index)) != EOF) |
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{ |
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switch (r) |
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{ |
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case 0: /* long option */ |
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break; |
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|
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case 'c': /* config file */ |
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confbase = strdup (optarg); |
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break; |
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|
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case 'D': /* no detach */ |
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do_detach = 0; |
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break; |
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|
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case 'L': /* lock into memory */ |
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do_mlock = 1; |
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break; |
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|
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case 'l': /* inc debug level */ |
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{ |
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llevel = string_to_loglevel (optarg); |
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|
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if (llevel == L_NONE) |
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slog (L_WARN, "'%s': %s", optarg, UNKNOWN_LOGLEVEL); |
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} |
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break; |
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|
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case '?': |
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usage (1); |
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|
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default: |
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break; |
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} |
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} |
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} |
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|
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// close network connections, and terminate neatly |
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static void |
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cleanup_and_exit (int c) |
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{ |
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network.shutdown_all (); |
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|
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if (conf.pidfilename) |
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remove_pid (conf.pidfilename); |
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|
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slog (L_INFO, _("terminating with exit code %d"), c); |
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|
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exit (c); |
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} |
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|
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// signal handlers |
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static void |
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sigterm_handler (int a) |
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{ |
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network.events |= vpn::EVENT_SHUTDOWN; |
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network.event.start (); |
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} |
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|
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static void |
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sighup_handler (int a) |
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{ |
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network.events |= vpn::EVENT_RECONNECT; |
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network.event.start (); |
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} |
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|
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static void |
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sigusr1_handler (int a) |
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{ |
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network.dump_status (); |
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} |
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|
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static void |
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sigusr2_handler (int a) |
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{ |
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} |
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|
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static void |
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setup_signals (void) |
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{ |
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struct sigaction act; |
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|
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sigfillset (&act.sa_mask); |
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act.sa_flags = 0; |
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|
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act.sa_handler = sighup_handler; sigaction (SIGHUP , &act, NULL); |
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act.sa_handler = sigusr1_handler; sigaction (SIGUSR1, &act, NULL); |
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act.sa_handler = sigusr2_handler; sigaction (SIGUSR2, &act, NULL); |
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act.sa_handler = SIG_IGN; sigaction (SIGPIPE, &act, NULL); |
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act.sa_flags = SA_RESETHAND; |
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act.sa_handler = sigterm_handler; sigaction (SIGINT , &act, NULL); |
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act.sa_handler = sigterm_handler; sigaction (SIGTERM, &act, NULL); |
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} |
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|
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static int rand_fd; |
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|
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// antique C++ requires external linkage :/ |
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void |
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reseed_rng (ev::timer &w, int revents) |
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{ |
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char buf [SEED_SIZE]; |
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int n = read (rand_fd, buf, sizeof (buf)); |
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|
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if (n > 0) |
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RAND_seed (buf, n); |
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} |
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|
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static void |
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setup_rng (void) |
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{ |
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if (!*conf.seed_dev) |
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return; |
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|
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#ifndef O_BINARY |
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# define O_BINARY 0 |
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#endif |
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#ifndef O_NONBLOCK |
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# define O_NONBLOCK 0 |
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#endif |
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|
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rand_fd = open (conf.seed_dev, O_RDONLY | O_NONBLOCK | O_BINARY); |
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|
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if (rand_fd < 0) |
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{ |
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slog (L_ERR, _("unable to open seed device '%s': %s, exiting."), conf.seed_dev, strerror (errno)); |
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exit (EXIT_FAILURE); |
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} |
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|
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static ev::timer reseed_timer; |
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|
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if (conf.reseed) |
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{ |
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reseed_timer.set<reseed_rng> (); |
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reseed_timer.set (conf.reseed, conf.reseed); |
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reseed_timer.start (EV_DEFAULT); |
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} |
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|
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reseed_rng (reseed_timer, 0); |
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} |
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|
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int |
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main (int argc, char **argv, char **envp) |
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{ |
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ERR_load_crypto_strings (); // we have the RAM |
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|
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// m,ake sure openssl agrees with us on the important bits |
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require (EVP_MD_size (MAC_DIGEST ()) == HASH_SIZE (MAC_DIGEST )); |
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require (EVP_MD_size (AUTH_DIGEST ()) == HASH_SIZE (AUTH_DIGEST)); |
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require (EVP_CIPHER_key_length (CIPHER ()) == KEY_SIZE (CIPHER )); |
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require (EVP_CIPHER_block_size (CIPHER ()) == BLOCK_SIZE (CIPHER )); |
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require (EVP_CIPHER_iv_length (CIPHER ()) == IV_SIZE (CIPHER )); |
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require (EVP_CIPHER_mode (CIPHER ()) == EVP_CIPH_CTR_MODE); |
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|
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curve25519_verify (); |
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hkdf::verify (); |
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|
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set_loglevel (L_INFO); |
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set_identity (argv[0]); |
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log_to (LOGTO_SYSLOG | LOGTO_STDERR); |
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|
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setlocale (LC_ALL, ""); |
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bindtextdomain (PACKAGE, LOCALEDIR); |
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textdomain (PACKAGE); |
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|
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parse_options (argc, argv, envp); |
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|
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argc -= optind; |
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argv += optind; |
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|
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if (show_version) |
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{ |
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printf (_("%s version %s (built %s %s, protocol version %d.%d)\n"), get_identity (), |
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VERSION, __DATE__, __TIME__, PROTOCOL_MAJOR, PROTOCOL_MINOR); |
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printf (_("Built with kernel interface %s/%s.\n"), IFTYPE, IFSUBTYPE); |
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printf (_ |
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("Copyright (C) 2003-2011 Marc Lehmann <gvpe@schmorp.de> and others.\n" |
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"See the AUTHORS file for a complete list.\n\n" |
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"GVPE comes with ABSOLUTELY NO WARRANTY. This is free software,\n" |
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"and you are welcome to redistribute it under certain conditions;\n" |
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"see the file COPYING for details.\n")); |
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|
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return 0; |
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} |
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|
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if (show_help) |
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usage (0); |
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|
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log_to (LOGTO_SYSLOG | LOGTO_STDERR); |
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|
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/* Lock all pages into memory if requested */ |
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|
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#if HAVE_MLOCKALL && HAVE_SYS_MMAN_H && _POSIX_MEMLOCK |
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if (do_mlock) |
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if (mlockall (MCL_CURRENT | MCL_FUTURE)) |
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slog (L_ERR, _("system call `%s' failed: %s"), "mlockall", strerror (errno)); |
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#endif |
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|
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if (argc >= 1) |
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{ |
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thisnode = *argv++; |
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argc--; |
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} |
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|
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if (!ev_default_loop (0)) |
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{ |
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slog (L_ERR, _("unable to initialise the event loop (bad $LIBEV_METHODS?)")); |
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exit (EXIT_FAILURE); |
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} |
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|
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{ |
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configuration_parser (conf, true, argc, argv); |
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} |
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|
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set_loglevel (llevel != L_NONE ? llevel : conf.llevel); |
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|
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setup_rng (); |
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|
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if (!THISNODE) |
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{ |
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slog (L_ERR, _("current node not set, or node '%s' not found in configfile, specify the nodename when starting gvpe."), |
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thisnode ? thisnode : "<unset>"); |
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exit (EXIT_FAILURE); |
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} |
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|
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if (detach (do_detach)) |
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exit (EXIT_SUCCESS); |
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|
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setup_signals (); |
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|
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if (!network.setup ()) |
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if (network.drop_privileges ()) |
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{ |
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ev_run (EV_DEFAULT_ 0); |
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cleanup_and_exit (EXIT_FAILURE); |
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} |
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|
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slog (L_CRIT, _("unrecoverable error while setting up network, exiting.")); |
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cleanup_and_exit (EXIT_FAILURE); |
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} |
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|
