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 1.10.4.73 2003/07/17 15:06:27 guus Exp $
25 /* Darwin (MacOS/X) needs the following definition... */
26 #ifndef _P1003_1B_VISIBLE
27 #define _P1003_1B_VISIBLE
32 #include <openssl/rand.h>
33 #include <openssl/rsa.h>
34 #include <openssl/pem.h>
35 #include <openssl/evp.h>
48 /* The name this program was run with. */
49 char *program_name = NULL;
51 /* If nonzero, display usage information and exit. */
54 /* If nonzero, print the version on standard output and exit. */
57 /* If nonzero, it will attempt to kill a running tincd and exit. */
60 /* If nonzero, generate public/private keypair for this host/net. */
61 int generate_keys = 0;
63 /* If nonzero, use null ciphers and skip all key exchanges. */
64 int bypass_security = 0;
66 /* If nonzero, disable swapping for this process. */
69 /* If nonzero, write log entries to a separate file. */
72 char *identname = NULL; /* program name for syslog */
73 char *pidfilename = NULL; /* pid file location */
74 char *logfilename = NULL; /* log file location */
75 char **g_argv; /* a copy of the cmdline arguments */
76 char **environment; /* A pointer to the environment on
79 static struct option const long_options[] = {
80 {"config", required_argument, NULL, 'c'},
81 {"kill", optional_argument, NULL, 'k'},
82 {"net", required_argument, NULL, 'n'},
83 {"help", no_argument, &show_help, 1},
84 {"version", no_argument, &show_version, 1},
85 {"no-detach", no_argument, &do_detach, 0},
86 {"generate-keys", optional_argument, NULL, 'K'},
87 {"debug", optional_argument, NULL, 'd'},
88 {"bypass-security", no_argument, &bypass_security, 1},
89 {"mlock", no_argument, &do_mlock, 1},
90 {"logfile", optional_argument, NULL, 'F'},
94 static void usage(int status)
97 fprintf(stderr, _("Try `%s --help\' for more information.\n"),
100 printf(_("Usage: %s [option]...\n\n"), program_name);
101 printf(_(" -c, --config=DIR Read configuration options from DIR.\n"
102 " -D, --no-detach Don't fork and detach.\n"
103 " -d, --debug[=LEVEL] Increase debug level or set it to LEVEL.\n"
104 " -k, --kill[=SIGNAL] Attempt to kill a running tincd and exit.\n"
105 " -n, --net=NETNAME Connect to net NETNAME.\n"
106 " -K, --generate-keys[=BITS] Generate public/private RSA keypair.\n"
107 " -L, --mlock Lock tinc into main memory.\n"
108 " -F, --logfile[=FILENAME] Write log entries to a logfile.\n"
109 " --help Display this help and exit.\n"
110 " --version Output version information and exit.\n\n"));
111 printf(_("Report bugs to tinc@nl.linux.org.\n"));
117 static void parse_options(int argc, char **argv, char **envp)
120 int option_index = 0;
122 while((r = getopt_long(argc, argv, "c:DLd::k::n:K::F::", long_options, &option_index)) != EOF) {
124 case 0: /* long option */
127 case 'c': /* config file */
128 confbase = xmalloc(strlen(optarg) + 1);
129 strcpy(confbase, optarg);
132 case 'D': /* no detach */
136 case 'L': /* no detach */
140 case 'd': /* inc debug level */
142 debug_level = atoi(optarg);
147 case 'k': /* kill old tincds */
149 if(!strcasecmp(optarg, "HUP"))
151 else if(!strcasecmp(optarg, "TERM"))
152 kill_tincd = SIGTERM;
153 else if(!strcasecmp(optarg, "KILL"))
154 kill_tincd = SIGKILL;
155 else if(!strcasecmp(optarg, "USR1"))
156 kill_tincd = SIGUSR1;
157 else if(!strcasecmp(optarg, "USR2"))
158 kill_tincd = SIGUSR2;
159 else if(!strcasecmp(optarg, "WINCH"))
160 kill_tincd = SIGWINCH;
161 else if(!strcasecmp(optarg, "INT"))
163 else if(!strcasecmp(optarg, "ALRM"))
164 kill_tincd = SIGALRM;
166 kill_tincd = atoi(optarg);
169 fprintf(stderr, _("Invalid argument `%s'; SIGNAL must be a number or one of HUP, TERM, KILL, USR1, USR2, WINCH, INT or ALRM.\n"),
175 kill_tincd = SIGTERM;
178 case 'n': /* net name given */
179 netname = xstrdup(optarg);
182 case 'K': /* generate public/private keypair */
184 generate_keys = atoi(optarg);
186 if(generate_keys < 512) {
187 fprintf(stderr, _("Invalid argument `%s'; BITS must be a number equal to or greater than 512.\n"),
192 generate_keys &= ~7; /* Round it to bytes */
194 generate_keys = 1024;
197 case 'F': /* write log entries to a file */
200 logfilename = xstrdup(optarg);
212 /* This function prettyprints the key generation process */
214 static void indicator(int a, int b, void *p)
218 fprintf(stderr, ".");
222 fprintf(stderr, "+");
226 fprintf(stderr, "-");
232 fprintf(stderr, " p\n");
236 fprintf(stderr, " q\n");
240 fprintf(stderr, "?");
245 fprintf(stderr, "?");
250 Generate a public/private RSA keypair, and ask for a file to store
253 static int keygen(int bits)
260 fprintf(stderr, _("Generating %d bits keys:\n"), bits);
261 rsa_key = RSA_generate_key(bits, 0xFFFF, indicator, NULL);
264 fprintf(stderr, _("Error during key generation!\n"));
267 fprintf(stderr, _("Done.\n"));
269 get_config_string(lookup_config(config_tree, "Name"), &name);
272 asprintf(&filename, "%s/hosts/%s", confbase, name);
274 asprintf(&filename, "%s/rsa_key.pub", confbase);
276 f = ask_and_safe_open(filename, _("public RSA key"), "a");
282 fprintf(stderr, _("Appending key to existing contents.\nMake sure only one key is stored in the file.\n"));
284 PEM_write_RSAPublicKey(f, rsa_key);
288 asprintf(&filename, "%s/rsa_key.priv", confbase);
289 f = ask_and_safe_open(filename, _("private RSA key"), "a");
295 fprintf(stderr, _("Appending key to existing contents.\nMake sure only one key is stored in the file.\n"));
297 PEM_write_RSAPrivateKey(f, rsa_key, NULL, NULL, 0, NULL, NULL);
305 Set all files and paths according to netname
307 static void make_names(void)
311 asprintf(&pidfilename, LOCALSTATEDIR "/run/tinc.%s.pid", netname);
313 asprintf(&logfilename, LOCALSTATEDIR "/log/tinc.%s.log", netname);
316 asprintf(&confbase, "%s/tinc/%s", CONFDIR, netname);
318 logger(LOG_INFO, _("Both netname and configuration directory given, using the latter..."));
321 asprintf(&identname, "tinc.%s", netname);
324 pidfilename = LOCALSTATEDIR "/run/tinc.pid";
326 logfilename = LOCALSTATEDIR "/log/tinc.log";
329 asprintf(&confbase, "%s/tinc", CONFDIR);
336 int main(int argc, char **argv, char **envp)
338 program_name = argv[0];
340 setlocale(LC_ALL, "");
341 bindtextdomain(PACKAGE, LOCALEDIR);
345 parse_options(argc, argv, envp);
349 printf(_("%s version %s (built %s %s, protocol %d)\n"), PACKAGE,
350 VERSION, __DATE__, __TIME__, PROT_CURRENT);
351 printf(_("Copyright (C) 1998-2003 Ivo Timmermans, Guus Sliepen and others.\n"
352 "See the AUTHORS file for a complete list.\n\n"
353 "tinc comes with ABSOLUTELY NO WARRANTY. This is free software,\n"
354 "and you are welcome to redistribute it under certain conditions;\n"
355 "see the file COPYING for details.\n"));
364 exit(kill_other(kill_tincd));
366 openlogger("tinc", LOGMODE_STDERR);
368 /* Lock all pages into memory if requested */
372 if(mlockall(MCL_CURRENT | MCL_FUTURE)) {
373 logger(LOG_ERR, _("System call `%s' failed: %s"), "mlockall",
377 logger(LOG_ERR, _("mlockall() not supported on this platform!"));
384 init_configuration(&config_tree);
386 /* Slllluuuuuuurrrrp! */
388 RAND_load_file("/dev/urandom", 1024);
390 OpenSSL_add_all_algorithms();
393 read_server_config();
394 exit(keygen(generate_keys));
397 if(read_server_config())
400 if(lzo_init() != LZO_E_OK) {
401 logger(LOG_ERR, _("Error initializing LZO compressor!"));
409 if(!setup_network_connections()) {
414 logger(LOG_ERR, _("Unrecoverable error"));
418 logger(LOG_NOTICE, _("Restarting in %d seconds!"), maxtimeout);
421 logger(LOG_ERR, _("Not restarting."));