2 tincd.c -- the main file for tincd
3 Copyright (C) 1998-2002 Ivo Timmermans <ivo@o2w.nl>
4 2000-2002 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 1.10.4.69 2003/07/06 17:15:25 guus Exp $
30 #include <sys/types.h>
37 /* Darwin (MacOS/X) needs the following definition... */
38 #ifndef _P1003_1B_VISIBLE
39 #define _P1003_1B_VISIBLE
44 #ifdef HAVE_SYS_IOCTL_H
45 # include <sys/ioctl.h>
48 #include <openssl/rand.h>
49 #include <openssl/rsa.h>
50 #include <openssl/pem.h>
51 #include <openssl/evp.h>
67 /* The name this program was run with. */
68 char *program_name = NULL;
70 /* If nonzero, display usage information and exit. */
73 /* If nonzero, print the version on standard output and exit. */
76 /* If nonzero, it will attempt to kill a running tincd and exit. */
79 /* If nonzero, generate public/private keypair for this host/net. */
80 int generate_keys = 0;
82 /* If nonzero, use null ciphers and skip all key exchanges. */
83 int bypass_security = 0;
85 /* If nonzero, disable swapping for this process. */
88 char *identname = NULL; /* program name for syslog */
89 char *pidfilename = NULL; /* pid file location */
90 char **g_argv; /* a copy of the cmdline arguments */
91 char **environment; /* A pointer to the environment on
94 static struct option const long_options[] = {
95 {"config", required_argument, NULL, 'c'},
96 {"kill", optional_argument, NULL, 'k'},
97 {"net", required_argument, NULL, 'n'},
98 {"help", no_argument, &show_help, 1},
99 {"version", no_argument, &show_version, 1},
100 {"no-detach", no_argument, &do_detach, 0},
101 {"generate-keys", optional_argument, NULL, 'K'},
102 {"debug", optional_argument, NULL, 'd'},
103 {"bypass-security", no_argument, &bypass_security, 1},
104 {"mlock", no_argument, &do_mlock, 1},
108 static void usage(int status)
111 fprintf(stderr, _("Try `%s --help\' for more information.\n"),
114 printf(_("Usage: %s [option]...\n\n"), program_name);
115 printf(_(" -c, --config=DIR Read configuration options from DIR.\n"
116 " -D, --no-detach Don't fork and detach.\n"
117 " -d, --debug[=LEVEL] Increase debug level or set it to LEVEL.\n"
118 " -k, --kill[=SIGNAL] Attempt to kill a running tincd and exit.\n"
119 " -n, --net=NETNAME Connect to net NETNAME.\n"
120 " -K, --generate-keys[=BITS] Generate public/private RSA keypair.\n"
121 " -L, --mlock Lock tinc into main memory.\n"
122 " --help Display this help and exit.\n"
123 " --version Output version information and exit.\n\n"));
124 printf(_("Report bugs to tinc@nl.linux.org.\n"));
130 void parse_options(int argc, char **argv, char **envp)
133 int option_index = 0;
135 while((r = getopt_long(argc, argv, "c:DLd::k::n:K::", long_options, &option_index)) != EOF) {
137 case 0: /* long option */
140 case 'c': /* config file */
141 confbase = xmalloc(strlen(optarg) + 1);
142 strcpy(confbase, optarg);
145 case 'D': /* no detach */
149 case 'L': /* no detach */
153 case 'd': /* inc debug level */
155 debug_lvl = atoi(optarg);
160 case 'k': /* kill old tincds */
162 if(!strcasecmp(optarg, "HUP"))
164 else if(!strcasecmp(optarg, "TERM"))
165 kill_tincd = SIGTERM;
166 else if(!strcasecmp(optarg, "KILL"))
167 kill_tincd = SIGKILL;
168 else if(!strcasecmp(optarg, "USR1"))
169 kill_tincd = SIGUSR1;
170 else if(!strcasecmp(optarg, "USR2"))
171 kill_tincd = SIGUSR2;
172 else if(!strcasecmp(optarg, "WINCH"))
173 kill_tincd = SIGWINCH;
174 else if(!strcasecmp(optarg, "INT"))
176 else if(!strcasecmp(optarg, "ALRM"))
177 kill_tincd = SIGALRM;
179 kill_tincd = atoi(optarg);
182 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;
191 case 'n': /* net name given */
192 netname = xmalloc(strlen(optarg) + 1);
193 strcpy(netname, optarg);
196 case 'K': /* generate public/private keypair */
198 generate_keys = atoi(optarg);
200 if(generate_keys < 512) {
201 fprintf(stderr, _("Invalid argument `%s'; BITS must be a number equal to or greater than 512.\n"),
206 generate_keys &= ~7; /* Round it to bytes */
208 generate_keys = 1024;
220 /* This function prettyprints the key generation process */
222 void indicator(int a, int b, void *p)
226 fprintf(stderr, ".");
230 fprintf(stderr, "+");
234 fprintf(stderr, "-");
240 fprintf(stderr, " p\n");
244 fprintf(stderr, " q\n");
248 fprintf(stderr, "?");
253 fprintf(stderr, "?");
258 Generate a public/private RSA keypair, and ask for a file to store
268 fprintf(stderr, _("Generating %d bits keys:\n"), bits);
269 rsa_key = RSA_generate_key(bits, 0xFFFF, indicator, NULL);
272 fprintf(stderr, _("Error during key generation!\n"));
275 fprintf(stderr, _("Done.\n"));
277 get_config_string(lookup_config(config_tree, "Name"), &name);
280 asprintf(&filename, "%s/hosts/%s", confbase, name);
282 asprintf(&filename, "%s/rsa_key.pub", confbase);
284 f = ask_and_safe_open(filename, _("public RSA key"), "a");
290 fprintf(stderr, _("Appending key to existing contents.\nMake sure only one key is stored in the file.\n"));
292 PEM_write_RSAPublicKey(f, rsa_key);
296 asprintf(&filename, "%s/rsa_key.priv", confbase);
297 f = ask_and_safe_open(filename, _("private RSA key"), "a");
303 fprintf(stderr, _("Appending key to existing contents.\nMake sure only one key is stored in the file.\n"));
305 PEM_write_RSAPrivateKey(f, rsa_key, NULL, NULL, 0, NULL, NULL);
313 Set all files and paths according to netname
315 void make_names(void)
319 asprintf(&pidfilename, LOCALSTATEDIR "/run/tinc.%s.pid", netname);
322 asprintf(&confbase, "%s/tinc/%s", CONFDIR, netname);
324 syslog(LOG_INFO, _("Both netname and configuration directory given, using the latter..."));
327 asprintf(&identname, "tinc.%s", netname);
330 pidfilename = LOCALSTATEDIR "/run/tinc.pid";
333 asprintf(&confbase, "%s/tinc", CONFDIR);
340 int main(int argc, char **argv, char **envp)
342 program_name = argv[0];
344 setlocale(LC_ALL, "");
345 bindtextdomain(PACKAGE, LOCALEDIR);
349 parse_options(argc, argv, envp);
353 printf(_("%s version %s (built %s %s, protocol %d)\n"), PACKAGE,
354 VERSION, __DATE__, __TIME__, PROT_CURRENT);
355 printf(_("Copyright (C) 1998-2002 Ivo Timmermans, Guus Sliepen and others.\n"
356 "See the AUTHORS file for a complete list.\n\n"
357 "tinc comes with ABSOLUTELY NO WARRANTY. This is free software,\n"
358 "and you are welcome to redistribute it under certain conditions;\n"
359 "see the file COPYING for details.\n"));
368 exit(kill_other(kill_tincd));
371 openlog("tinc", LOG_CONS, LOG_DAEMON); /* Catch all syslog() calls issued before detaching */
373 openlog("tinc", LOG_PERROR, LOG_DAEMON); /* Catch all syslog() calls issued before detaching */
376 /* Lock all pages into memory if requested */
380 if(mlockall(MCL_CURRENT | MCL_FUTURE)) {
381 syslog(LOG_ERR, _("System call `%s' failed: %s"), "mlockall",
385 syslog(LOG_ERR, _("mlockall() not supported on this platform!"));
392 init_configuration(&config_tree);
394 /* Slllluuuuuuurrrrp! */
396 RAND_load_file("/dev/urandom", 1024);
398 OpenSSL_add_all_algorithms();
401 read_server_config();
402 exit(keygen(generate_keys));
405 if(read_server_config())
408 if(lzo_init() != LZO_E_OK) {
409 syslog(LOG_ERR, _("Error initializing LZO compressor!"));
417 if(!setup_network_connections()) {
422 syslog(LOG_ERR, _("Unrecoverable error"));
426 syslog(LOG_NOTICE, _("Restarting in %d seconds!"), maxtimeout);
429 syslog(LOG_ERR, _("Not restarting."));