2 tincd.c -- the main file for tincd
3 Copyright (C) 1998-2003 Ivo Timmermans <ivo@o2w.nl>
4 2000-2003 Guus Sliepen <guus@sliepen.eu.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.
20 $Id: tincd.c,v 1.10.4.90 2003/12/07 14:31:09 guus Exp $
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 <gnutls/gnutls.h>
51 /* The name this program was run with. */
52 char *program_name = NULL;
54 /* If nonzero, display usage information and exit. */
55 bool show_help = false;
57 /* If nonzero, print the version on standard output and exit. */
58 bool show_version = false;
60 /* If nonzero, it will attempt to kill a running tincd and exit. */
63 /* If nonzero, generate public/private keypair for this host/net. */
64 int generate_keys = 0;
66 /* If nonzero, use null ciphers and skip all key exchanges. */
67 bool bypass_security = false;
69 /* If nonzero, disable swapping for this process. */
70 bool do_mlock = false;
72 /* If nonzero, write log entries to a separate file. */
73 bool use_logfile = false;
75 char *identname = NULL; /* program name for syslog */
76 char *pidfilename = NULL; /* pid file location */
77 char *logfilename = NULL; /* log file location */
78 char **g_argv; /* a copy of the cmdline arguments */
82 static struct option const long_options[] = {
83 {"config", required_argument, NULL, 'c'},
84 {"kill", optional_argument, NULL, 'k'},
85 {"net", required_argument, NULL, 'n'},
86 {"help", no_argument, NULL, 1},
87 {"version", no_argument, NULL, 2},
88 {"no-detach", no_argument, NULL, 'D'},
89 {"generate-keys", optional_argument, NULL, 'K'},
90 {"debug", optional_argument, NULL, 'd'},
91 {"bypass-security", no_argument, NULL, 3},
92 {"mlock", no_argument, NULL, 'L'},
93 {"logfile", optional_argument, NULL, 4},
94 {"pidfile", required_argument, NULL, 5},
99 static struct WSAData wsa_state;
102 static void usage(bool status)
105 fprintf(stderr, _("Try `%s --help\' for more information.\n"),
108 printf(_("Usage: %s [option]...\n\n"), program_name);
109 printf(_(" -c, --config=DIR Read configuration options from DIR.\n"
110 " -D, --no-detach Don't fork and detach.\n"
111 " -d, --debug[=LEVEL] Increase debug level or set it to LEVEL.\n"
112 " -k, --kill[=SIGNAL] Attempt to kill a running tincd and exit.\n"
113 " -n, --net=NETNAME Connect to net NETNAME.\n"
114 " -K, --generate-keys[=BITS] Generate public/private RSA keypair.\n"
115 " -L, --mlock Lock tinc into main memory.\n"
116 " --logfile[=FILENAME] Write log entries to a logfile.\n"
117 " --pidfile=FILENAME Write PID to FILENAME.\n"
118 " --help Display this help and exit.\n"
119 " --version Output version information and exit.\n\n"));
120 printf(_("Report bugs to tinc@nl.linux.org.\n"));
124 static bool parse_options(int argc, char **argv)
127 int option_index = 0;
129 while((r = getopt_long(argc, argv, "c:DLd::k::n:K::", long_options, &option_index)) != EOF) {
131 case 0: /* long option */
134 case 'c': /* config file */
135 confbase = xstrdup(optarg);
138 case 'D': /* no detach */
142 case 'L': /* no detach */
146 case 'd': /* inc debug level */
148 debug_level = atoi(optarg);
153 case 'k': /* kill old tincds */
156 if(!strcasecmp(optarg, "HUP"))
158 else if(!strcasecmp(optarg, "TERM"))
159 kill_tincd = SIGTERM;
160 else if(!strcasecmp(optarg, "KILL"))
161 kill_tincd = SIGKILL;
162 else if(!strcasecmp(optarg, "USR1"))
163 kill_tincd = SIGUSR1;
164 else if(!strcasecmp(optarg, "USR2"))
165 kill_tincd = SIGUSR2;
166 else if(!strcasecmp(optarg, "WINCH"))
167 kill_tincd = SIGWINCH;
168 else if(!strcasecmp(optarg, "INT"))
170 else if(!strcasecmp(optarg, "ALRM"))
171 kill_tincd = SIGALRM;
173 kill_tincd = atoi(optarg);
176 fprintf(stderr, _("Invalid argument `%s'; SIGNAL must be a number or one of HUP, TERM, KILL, USR1, USR2, WINCH, INT or ALRM.\n"),
183 kill_tincd = SIGTERM;
189 case 'n': /* net name given */
190 netname = xstrdup(optarg);
193 case 'K': /* generate public/private keypair */
195 generate_keys = atoi(optarg);
197 if(generate_keys < 512) {
198 fprintf(stderr, _("Invalid argument `%s'; BITS must be a number equal to or greater than 512.\n"),
204 generate_keys &= ~7; /* Round it to bytes */
206 generate_keys = 1024;
209 case 1: /* show help */
213 case 2: /* show version */
217 case 3: /* bypass security */
218 bypass_security = true;
221 case 4: /* write log entries to a file */
224 logfilename = xstrdup(optarg);
227 case 5: /* write PID to a file */
228 pidfilename = xstrdup(optarg);
243 /* This function prettyprints the key generation process */
245 static void indicator(int a, int b, void *p)
249 fprintf(stderr, ".");
253 fprintf(stderr, "+");
257 fprintf(stderr, "-");
263 fprintf(stderr, " p\n");
267 fprintf(stderr, " q\n");
271 fprintf(stderr, "?");
276 fprintf(stderr, "?");
281 Generate a public/private RSA keypair, and ask for a file to store
284 static bool keygen(int bits)
286 fprintf(stderr, _("Use certtool!\n"));
295 fprintf(stderr, _("Generating %d bits keys:\n"), bits);
296 rsa_key = RSA_generate_key(bits, 0x10001, indicator, NULL);
299 fprintf(stderr, _("Error during key generation!\n"));
302 fprintf(stderr, _("Done.\n"));
304 asprintf(&filename, "%s/rsa_key.priv", confbase);
305 f = ask_and_open(filename, _("private RSA key"), "a");
311 /* Make it unreadable for others. */
312 fchmod(fileno(f), 0600);
316 fprintf(stderr, _("Appending key to existing contents.\nMake sure only one key is stored in the file.\n"));
318 PEM_write_RSAPrivateKey(f, rsa_key, NULL, NULL, 0, NULL, NULL);
322 get_config_string(lookup_config(config_tree, "Name"), &name);
325 asprintf(&filename, "%s/hosts/%s", confbase, name);
327 asprintf(&filename, "%s/rsa_key.pub", confbase);
329 f = ask_and_open(filename, _("public RSA key"), "a");
335 fprintf(stderr, _("Appending key to existing contents.\nMake sure only one key is stored in the file.\n"));
337 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);
383 asprintf(&logfilename, LOCALSTATEDIR "/log/%s.log", identname);
387 asprintf(&confbase, CONFDIR "/tinc/%s", netname);
389 logger(LOG_INFO, _("Both netname and configuration directory given, using the latter..."));
392 asprintf(&confbase, CONFDIR "/tinc");
396 int main(int argc, char **argv)
398 program_name = argv[0];
400 setlocale(LC_ALL, "");
401 bindtextdomain(PACKAGE, LOCALEDIR);
404 if(!parse_options(argc, argv))
410 printf(_("%s version %s (built %s %s, protocol %d)\n"), PACKAGE,
411 VERSION, __DATE__, __TIME__, PROT_CURRENT);
412 printf(_("Copyright (C) 1998-2003 Ivo Timmermans, Guus Sliepen and others.\n"
413 "See the AUTHORS file for a complete list.\n\n"
414 "tinc comes with ABSOLUTELY NO WARRANTY. This is free software,\n"
415 "and you are welcome to redistribute it under certain conditions;\n"
416 "see the file COPYING for details.\n"));
427 return !kill_other(kill_tincd);
429 openlogger("tinc", use_logfile?LOGMODE_FILE:LOGMODE_STDERR);
431 /* Lock all pages into memory if requested */
435 if(mlockall(MCL_CURRENT | MCL_FUTURE)) {
436 logger(LOG_ERR, _("System call `%s' failed: %s"), "mlockall",
440 logger(LOG_ERR, _("mlockall() not supported on this platform!"));
447 init_configuration(&config_tree);
449 /* Slllluuuuuuurrrrp! */
451 gnutls_global_init();
454 read_server_config();
455 return !keygen(generate_keys);
458 if(!read_server_config())
461 if(lzo_init() != LZO_E_OK) {
462 logger(LOG_ERR, _("Error initializing LZO compressor!"));
467 if(WSAStartup(MAKEWORD(2, 2), &wsa_state)) {
468 logger(LOG_ERR, _("System call `%s' failed: %s"), "WSAStartup", winerror(GetLastError()));
472 if(!do_detach || !init_service())
473 return main2(argc, argv);
478 int main2(int argc, char **argv)
486 /* Setup sockets and open device. */
488 if(!setup_network_connections())
491 /* Start main loop. It only exits when tinc is killed. */
493 status = main_loop();
495 /* Shutdown properly. */
497 close_network_connections();
503 logger(LOG_NOTICE, _("Terminating"));
506 remove_pid(pidfilename);