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 1.10.4.65 2002/09/15 14:55:54 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>
65 /* The name this program was run with. */
68 /* If nonzero, display usage information and exit. */
71 /* If nonzero, print the version on standard output and exit. */
74 /* If nonzero, it will attempt to kill a running tincd and exit. */
77 /* If nonzero, generate public/private keypair for this host/net. */
78 int generate_keys = 0;
80 /* If nonzero, use null ciphers and skip all key exchanges. */
81 int bypass_security = 0;
83 /* If nonzero, disable swapping for this process. */
86 char *identname; /* program name for syslog */
87 char *pidfilename; /* pid file location */
88 char **g_argv; /* a copy of the cmdline arguments */
89 char **environment; /* A pointer to the environment on
92 static struct option const long_options[] = {
93 {"config", required_argument, NULL, 'c'},
94 {"kill", optional_argument, NULL, 'k'},
95 {"net", required_argument, NULL, 'n'},
96 {"help", no_argument, &show_help, 1},
97 {"version", no_argument, &show_version, 1},
98 {"no-detach", no_argument, &do_detach, 0},
99 {"generate-keys", optional_argument, NULL, 'K'},
100 {"debug", optional_argument, NULL, 'd'},
101 {"bypass-security", no_argument, &bypass_security, 1},
102 {"mlock", no_argument, &do_mlock, 1},
106 static void usage(int status)
109 fprintf(stderr, _("Try `%s --help\' for more information.\n"),
112 printf(_("Usage: %s [option]...\n\n"), program_name);
113 printf(_(" -c, --config=DIR Read configuration options from DIR.\n"
114 " -D, --no-detach Don't fork and detach.\n"
115 " -d, --debug[=LEVEL] Increase debug level or set it to LEVEL.\n"
116 " -k, --kill[=SIGNAL] Attempt to kill a running tincd and exit.\n"
117 " -n, --net=NETNAME Connect to net NETNAME.\n"
118 " -K, --generate-keys[=BITS] Generate public/private RSA keypair.\n"
119 " -L, --mlock Lock tinc into main memory.\n"
120 " --help Display this help and exit.\n"
121 " --version Output version information and exit.\n\n"));
122 printf(_("Report bugs to tinc@nl.linux.org.\n"));
128 void parse_options(int argc, char **argv, char **envp)
131 int option_index = 0;
133 while((r = getopt_long(argc, argv, "c:DLd::k::n:K::", long_options, &option_index)) != EOF) {
135 case 0: /* long option */
138 case 'c': /* config file */
139 confbase = xmalloc(strlen(optarg) + 1);
140 strcpy(confbase, optarg);
143 case 'D': /* no detach */
147 case 'L': /* no detach */
151 case 'd': /* inc debug level */
153 debug_lvl = atoi(optarg);
158 case 'k': /* kill old tincds */
160 if(!strcasecmp(optarg, "HUP"))
162 else if(!strcasecmp(optarg, "TERM"))
163 kill_tincd = SIGTERM;
164 else if(!strcasecmp(optarg, "KILL"))
165 kill_tincd = SIGKILL;
166 else if(!strcasecmp(optarg, "USR1"))
167 kill_tincd = SIGUSR1;
168 else if(!strcasecmp(optarg, "USR2"))
169 kill_tincd = SIGUSR2;
170 else if(!strcasecmp(optarg, "WINCH"))
171 kill_tincd = SIGWINCH;
172 else if(!strcasecmp(optarg, "INT"))
174 else if(!strcasecmp(optarg, "ALRM"))
175 kill_tincd = SIGALRM;
177 kill_tincd = atoi(optarg);
180 fprintf(stderr, _("Invalid argument `%s'; SIGNAL must be a number or one of HUP, TERM, KILL, USR1, USR2, WINCH, INT or ALRM.\n"),
186 kill_tincd = SIGTERM;
189 case 'n': /* net name given */
190 netname = xmalloc(strlen(optarg) + 1);
191 strcpy(netname, optarg);
194 case 'K': /* generate public/private keypair */
196 generate_keys = atoi(optarg);
198 if(generate_keys < 512) {
199 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;
218 /* This function prettyprints the key generation process */
220 void indicator(int a, int b, void *p)
224 fprintf(stderr, ".");
228 fprintf(stderr, "+");
232 fprintf(stderr, "-");
238 fprintf(stderr, " p\n");
242 fprintf(stderr, " q\n");
246 fprintf(stderr, "?");
251 fprintf(stderr, "?");
256 Generate a public/private RSA keypair, and ask for a file to store
266 fprintf(stderr, _("Generating %d bits keys:\n"), bits);
267 rsa_key = RSA_generate_key(bits, 0xFFFF, indicator, NULL);
270 fprintf(stderr, _("Error during key generation!\n"));
273 fprintf(stderr, _("Done.\n"));
275 get_config_string(lookup_config(config_tree, "Name"), &name);
278 asprintf(&filename, "%s/hosts/%s", confbase, name);
280 asprintf(&filename, "%s/rsa_key.pub", confbase);
282 f = ask_and_safe_open(filename, _("public RSA key"), "a");
288 fprintf(stderr, _("Appending key to existing contents.\nMake sure only one key is stored in the file.\n"));
290 PEM_write_RSAPublicKey(f, rsa_key);
294 asprintf(&filename, "%s/rsa_key.priv", confbase);
295 f = ask_and_safe_open(filename, _("private RSA key"), "a");
301 fprintf(stderr, _("Appending key to existing contents.\nMake sure only one key is stored in the file.\n"));
303 PEM_write_RSAPrivateKey(f, rsa_key, NULL, NULL, 0, NULL, NULL);
311 Set all files and paths according to netname
313 void make_names(void)
317 asprintf(&pidfilename, LOCALSTATEDIR "/run/tinc.%s.pid", netname);
320 asprintf(&confbase, "%s/tinc/%s", CONFDIR, netname);
322 syslog(LOG_INFO, _("Both netname and configuration directory given, using the latter..."));
325 asprintf(&identname, "tinc.%s", netname);
328 pidfilename = LOCALSTATEDIR "/run/tinc.pid";
331 asprintf(&confbase, "%s/tinc", CONFDIR);
338 int main(int argc, char **argv, char **envp)
340 program_name = argv[0];
342 setlocale(LC_ALL, "");
343 bindtextdomain(PACKAGE, LOCALEDIR);
347 parse_options(argc, argv, envp);
350 printf(_("%s version %s (built %s %s, protocol %d)\n"), PACKAGE,
351 VERSION, __DATE__, __TIME__, PROT_CURRENT);
352 printf(_("Copyright (C) 1998-2002 Ivo Timmermans, Guus Sliepen and others.\n"
353 "See the AUTHORS file for a complete list.\n\n"
354 "tinc comes with ABSOLUTELY NO WARRANTY. This is free software,\n"
355 "and you are welcome to redistribute it under certain conditions;\n"
356 "see the file COPYING for details.\n"));
365 openlog("tinc", LOG_CONS, LOG_DAEMON); /* Catch all syslog() calls issued before detaching */
367 openlog("tinc", LOG_PERROR, LOG_DAEMON); /* Catch all syslog() calls issued before detaching */
370 /* Lock all pages into memory if requested */
374 if(mlockall(MCL_CURRENT | MCL_FUTURE)) {
375 syslog(LOG_ERR, _("System call `%s' failed: %s"), "mlockall",
379 syslog(LOG_ERR, _("mlockall() not supported on this platform!"));
387 init_configuration(&config_tree);
389 /* Slllluuuuuuurrrrp! */
391 RAND_load_file("/dev/urandom", 1024);
393 #ifdef HAVE_SSLEAY_ADD_ALL_ALGORITHMS
394 SSLeay_add_all_algorithms();
396 OpenSSL_add_all_algorithms();
400 read_server_config();
401 exit(keygen(generate_keys));
405 exit(kill_other(kill_tincd));
407 if(read_server_config())
414 if(!setup_network_connections()) {
419 syslog(LOG_ERR, _("Unrecoverable error"));
423 syslog(LOG_NOTICE, _("Restarting in %d seconds!"), maxtimeout);
426 syslog(LOG_ERR, _("Not restarting."));