2 tincd.c -- the main file for tincd
3 Copyright (C) 1998-2005 Ivo Timmermans
4 2000-2007 Guus Sliepen <guus@tinc-vpn.org>
6 This program is free software; you can redistribute it and/or modify
7 it under the terms of the GNU General Public License as published by
8 the Free Software Foundation; either version 2 of the License, or
9 (at your option) any later version.
11 This program is distributed in the hope that it will be useful,
12 but WITHOUT ANY WARRANTY; without even the implied warranty of
13 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
14 GNU General Public License for more details.
16 You should have received a copy of the GNU General Public License
17 along with this program; if not, write to the Free Software
18 Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
25 /* Darwin (MacOS/X) needs the following definition... */
26 #ifndef _P1003_1B_VISIBLE
27 #define _P1003_1B_VISIBLE
30 #ifdef HAVE_SYS_MMAN_H
34 #include <openssl/rand.h>
35 #include <openssl/rsa.h>
36 #include <openssl/pem.h>
37 #include <openssl/evp.h>
38 #include <openssl/engine.h>
55 /* The name this program was run with. */
56 char *program_name = NULL;
58 /* If nonzero, display usage information and exit. */
59 bool show_help = false;
61 /* If nonzero, print the version on standard output and exit. */
62 bool show_version = false;
64 /* If nonzero, it will attempt to kill a running tincd and exit. */
67 /* If nonzero, generate public/private keypair for this host/net. */
68 int generate_keys = 0;
70 /* If nonzero, use null ciphers and skip all key exchanges. */
71 bool bypass_security = false;
73 /* If nonzero, disable swapping for this process. */
74 bool do_mlock = false;
76 /* If nonzero, write log entries to a separate file. */
77 bool use_logfile = false;
79 char *identname = NULL; /* program name for syslog */
80 char *pidfilename = NULL; /* pid file location */
81 char *controlfilename = NULL; /* pid file location */
82 char *logfilename = NULL; /* log file location */
83 char **g_argv; /* a copy of the cmdline arguments */
87 static struct option const long_options[] = {
88 {"config", required_argument, NULL, 'c'},
89 {"kill", optional_argument, NULL, 'k'},
90 {"net", required_argument, NULL, 'n'},
91 {"help", no_argument, NULL, 1},
92 {"version", no_argument, NULL, 2},
93 {"no-detach", no_argument, NULL, 'D'},
94 {"generate-keys", optional_argument, NULL, 'K'},
95 {"debug", optional_argument, NULL, 'd'},
96 {"bypass-security", no_argument, NULL, 3},
97 {"mlock", no_argument, NULL, 'L'},
98 {"logfile", optional_argument, NULL, 4},
99 {"pidfile", required_argument, NULL, 5},
104 static struct WSAData wsa_state;
107 static void usage(bool status)
110 fprintf(stderr, _("Try `%s --help\' for more information.\n"),
113 printf(_("Usage: %s [option]...\n\n"), program_name);
114 printf(_(" -c, --config=DIR Read configuration options from DIR.\n"
115 " -D, --no-detach Don't fork and detach.\n"
116 " -d, --debug[=LEVEL] Increase debug level or set it to LEVEL.\n"
117 " -k, --kill[=SIGNAL] Attempt to kill a running tincd and exit.\n"
118 " -n, --net=NETNAME Connect to net NETNAME.\n"
119 " -K, --generate-keys[=BITS] Generate public/private RSA keypair.\n"
120 " -L, --mlock Lock tinc into main memory.\n"
121 " --logfile[=FILENAME] Write log entries to a logfile.\n"
122 " --pidfile=FILENAME Write PID to FILENAME.\n"
123 " --help Display this help and exit.\n"
124 " --version Output version information and exit.\n\n"));
125 printf(_("Report bugs to tinc@tinc-vpn.org.\n"));
129 static bool parse_options(int argc, char **argv)
132 int option_index = 0;
134 while((r = getopt_long(argc, argv, "c:DLd::k::n:K::", long_options, &option_index)) != EOF) {
136 case 0: /* long option */
139 case 'c': /* config file */
140 confbase = xstrdup(optarg);
143 case 'D': /* no detach */
147 case 'L': /* no detach */
151 case 'd': /* inc debug level */
153 debug_level = atoi(optarg);
158 case 'k': /* kill old tincds */
161 if(!strcasecmp(optarg, "HUP"))
163 else if(!strcasecmp(optarg, "TERM"))
164 kill_tincd = SIGTERM;
165 else if(!strcasecmp(optarg, "KILL"))
166 kill_tincd = SIGKILL;
167 else if(!strcasecmp(optarg, "USR1"))
168 kill_tincd = SIGUSR1;
169 else if(!strcasecmp(optarg, "USR2"))
170 kill_tincd = SIGUSR2;
171 else if(!strcasecmp(optarg, "WINCH"))
172 kill_tincd = SIGWINCH;
173 else if(!strcasecmp(optarg, "INT"))
175 else if(!strcasecmp(optarg, "ALRM"))
176 kill_tincd = SIGALRM;
178 kill_tincd = atoi(optarg);
181 fprintf(stderr, _("Invalid argument `%s'; SIGNAL must be a number or one of HUP, TERM, KILL, USR1, USR2, WINCH, INT or ALRM.\n"),
188 kill_tincd = SIGTERM;
194 case 'n': /* net name given */
195 netname = xstrdup(optarg);
198 case 'K': /* generate public/private keypair */
200 generate_keys = atoi(optarg);
202 if(generate_keys < 512) {
203 fprintf(stderr, _("Invalid argument `%s'; BITS must be a number equal to or greater than 512.\n"),
209 generate_keys &= ~7; /* Round it to bytes */
211 generate_keys = 1024;
214 case 1: /* show help */
218 case 2: /* show version */
222 case 3: /* bypass security */
223 bypass_security = true;
226 case 4: /* write log entries to a file */
229 logfilename = xstrdup(optarg);
232 case 5: /* write PID to a file */
233 pidfilename = xstrdup(optarg);
248 /* This function prettyprints the key generation process */
250 static void indicator(int a, int b, void *p)
254 fprintf(stderr, ".");
258 fprintf(stderr, "+");
262 fprintf(stderr, "-");
268 fprintf(stderr, " p\n");
272 fprintf(stderr, " q\n");
276 fprintf(stderr, "?");
281 fprintf(stderr, "?");
286 Generate a public/private RSA keypair, and ask for a file to store
289 static bool keygen(int bits)
296 fprintf(stderr, _("Generating %d bits keys:\n"), bits);
297 rsa_key = RSA_generate_key(bits, 0x10001, indicator, NULL);
300 fprintf(stderr, _("Error during key generation!\n"));
303 fprintf(stderr, _("Done.\n"));
305 asprintf(&filename, "%s/rsa_key.priv", confbase);
306 f = ask_and_open(filename, _("private RSA key"), "a");
312 /* Make it unreadable for others. */
313 fchmod(fileno(f), 0600);
317 fprintf(stderr, _("Appending key to existing contents.\nMake sure only one key is stored in the file.\n"));
319 PEM_write_RSAPrivateKey(f, rsa_key, NULL, NULL, 0, NULL, NULL);
323 get_config_string(lookup_config(config_tree, "Name"), &name);
326 asprintf(&filename, "%s/hosts/%s", confbase, name);
328 asprintf(&filename, "%s/rsa_key.pub", confbase);
330 f = ask_and_open(filename, _("public RSA key"), "a");
336 fprintf(stderr, _("Appending key to existing contents.\nMake sure only one key is stored in the file.\n"));
338 PEM_write_RSAPublicKey(f, rsa_key);
346 Set all files and paths according to netname
348 static void make_names(void)
352 char installdir[1024] = "";
353 long len = sizeof(installdir);
357 asprintf(&identname, "tinc.%s", netname);
359 identname = xstrdup("tinc");
362 if(!RegOpenKeyEx(HKEY_LOCAL_MACHINE, "SOFTWARE\\tinc", 0, KEY_READ, &key)) {
363 if(!RegQueryValueEx(key, NULL, 0, 0, installdir, &len)) {
365 asprintf(&logfilename, "%s/log/%s.log", identname);
368 asprintf(&confbase, "%s/%s", installdir, netname);
370 asprintf(&confbase, "%s", installdir);
380 asprintf(&pidfilename, LOCALSTATEDIR "/run/%s.pid", identname);
382 asprintf(&controlfilename, LOCALSTATEDIR "/run/%s.control", identname);
385 asprintf(&logfilename, LOCALSTATEDIR "/log/%s.log", identname);
389 asprintf(&confbase, CONFDIR "/tinc/%s", netname);
391 logger(LOG_INFO, _("Both netname and configuration directory given, using the latter..."));
394 asprintf(&confbase, CONFDIR "/tinc");
398 int main(int argc, char **argv)
400 program_name = argv[0];
402 setlocale(LC_ALL, "");
403 bindtextdomain(PACKAGE, LOCALEDIR);
406 if(!parse_options(argc, argv))
412 printf(_("%s version %s (built %s %s, protocol %d)\n"), PACKAGE,
413 VERSION, __DATE__, __TIME__, PROT_CURRENT);
414 printf(_("Copyright (C) 1998-2007 Ivo Timmermans, Guus Sliepen and others.\n"
415 "See the AUTHORS file for a complete list.\n\n"
416 "tinc comes with ABSOLUTELY NO WARRANTY. This is free software,\n"
417 "and you are welcome to redistribute it under certain conditions;\n"
418 "see the file COPYING for details.\n"));
429 return !kill_other(kill_tincd);
431 openlogger("tinc", use_logfile?LOGMODE_FILE:LOGMODE_STDERR);
433 /* Lock all pages into memory if requested */
437 if(mlockall(MCL_CURRENT | MCL_FUTURE)) {
438 logger(LOG_ERR, _("System call `%s' failed: %s"), "mlockall",
442 logger(LOG_ERR, _("mlockall() not supported on this platform!"));
449 init_configuration(&config_tree);
451 /* Slllluuuuuuurrrrp! */
454 RAND_load_file("/dev/urandom", 1024);
456 ENGINE_load_builtin_engines();
457 ENGINE_register_all_complete();
459 OpenSSL_add_all_algorithms();
462 read_server_config();
463 return !keygen(generate_keys);
466 if(!read_server_config())
470 logger(LOG_ERR, _("Error initializing libevent!"));
474 if(lzo_init() != LZO_E_OK) {
475 logger(LOG_ERR, _("Error initializing LZO compressor!"));
480 if(WSAStartup(MAKEWORD(2, 2), &wsa_state)) {
481 logger(LOG_ERR, _("System call `%s' failed: %s"), "WSAStartup", winerror(GetLastError()));
485 if(!do_detach || !init_service())
486 return main2(argc, argv);
491 int main2(int argc, char **argv)
499 /* Setup sockets and open device. */
501 if(!setup_network_connections())
504 /* Start main loop. It only exits when tinc is killed. */
506 status = main_loop();
508 /* Shutdown properly. */
510 close_network_connections();
516 logger(LOG_NOTICE, _("Terminating"));
519 remove_pid(pidfilename);