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 1.10.4.79 2003/07/30 11:50:45 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 <openssl/rand.h>
35 #include <openssl/rsa.h>
36 #include <openssl/pem.h>
37 #include <openssl/evp.h>
52 /* The name this program was run with. */
53 char *program_name = NULL;
55 /* If nonzero, display usage information and exit. */
56 bool show_help = false;
58 /* If nonzero, print the version on standard output and exit. */
59 bool show_version = false;
61 /* If nonzero, it will attempt to kill a running tincd and exit. */
64 /* If nonzero, generate public/private keypair for this host/net. */
65 int generate_keys = 0;
67 /* If nonzero, use null ciphers and skip all key exchanges. */
68 bool bypass_security = false;
70 /* If nonzero, disable swapping for this process. */
71 bool do_mlock = false;
73 /* If nonzero, write log entries to a separate file. */
74 bool use_logfile = false;
76 char *identname = NULL; /* program name for syslog */
77 char *pidfilename = NULL; /* pid file location */
78 char *logfilename = NULL; /* log file location */
79 char **g_argv; /* a copy of the cmdline arguments */
80 char **environment; /* A pointer to the environment on startup */
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"));
126 static void parse_options(int argc, char **argv, char **envp)
129 int option_index = 0;
131 while((r = getopt_long(argc, argv, "c:DLd::k::n:K::", long_options, &option_index)) != EOF) {
133 case 0: /* long option */
136 case 'c': /* config file */
137 confbase = xstrdup(optarg);
140 case 'D': /* no detach */
144 case 'L': /* no detach */
148 case 'd': /* inc debug level */
150 debug_level = atoi(optarg);
155 case 'k': /* kill old tincds */
158 if(!strcasecmp(optarg, "HUP"))
160 else if(!strcasecmp(optarg, "TERM"))
161 kill_tincd = SIGTERM;
162 else if(!strcasecmp(optarg, "KILL"))
163 kill_tincd = SIGKILL;
164 else if(!strcasecmp(optarg, "USR1"))
165 kill_tincd = SIGUSR1;
166 else if(!strcasecmp(optarg, "USR2"))
167 kill_tincd = SIGUSR2;
168 else if(!strcasecmp(optarg, "WINCH"))
169 kill_tincd = SIGWINCH;
170 else if(!strcasecmp(optarg, "INT"))
172 else if(!strcasecmp(optarg, "ALRM"))
173 kill_tincd = SIGALRM;
175 kill_tincd = atoi(optarg);
178 fprintf(stderr, _("Invalid argument `%s'; SIGNAL must be a number or one of HUP, TERM, KILL, USR1, USR2, WINCH, INT or ALRM.\n"),
184 kill_tincd = SIGTERM;
188 case 'n': /* net name given */
189 netname = xstrdup(optarg);
192 case 'K': /* generate public/private keypair */
194 generate_keys = atoi(optarg);
196 if(generate_keys < 512) {
197 fprintf(stderr, _("Invalid argument `%s'; BITS must be a number equal to or greater than 512.\n"),
202 generate_keys &= ~7; /* Round it to bytes */
204 generate_keys = 1024;
207 case 1: /* show help */
211 case 2: /* show version */
215 case 3: /* bypass security */
216 bypass_security = true;
219 case 4: /* write log entries to a file */
222 logfilename = xstrdup(optarg);
225 case 5: /* write PID to a file */
226 pidfilename = xstrdup(optarg);
238 /* This function prettyprints the key generation process */
240 static void indicator(int a, int b, void *p)
244 fprintf(stderr, ".");
248 fprintf(stderr, "+");
252 fprintf(stderr, "-");
258 fprintf(stderr, " p\n");
262 fprintf(stderr, " q\n");
266 fprintf(stderr, "?");
271 fprintf(stderr, "?");
276 Generate a public/private RSA keypair, and ask for a file to store
279 static bool keygen(int bits)
286 fprintf(stderr, _("Generating %d bits keys:\n"), bits);
287 rsa_key = RSA_generate_key(bits, 0xFFFF, indicator, NULL);
290 fprintf(stderr, _("Error during key generation!\n"));
293 fprintf(stderr, _("Done.\n"));
295 asprintf(&filename, "%s/rsa_key.priv", confbase);
296 f = ask_and_safe_open(filename, _("private RSA key"), true, "a");
302 fprintf(stderr, _("Appending key to existing contents.\nMake sure only one key is stored in the file.\n"));
304 PEM_write_RSAPrivateKey(f, rsa_key, NULL, NULL, 0, NULL, NULL);
308 get_config_string(lookup_config(config_tree, "Name"), &name);
311 asprintf(&filename, "%s/hosts/%s", confbase, name);
313 asprintf(&filename, "%s/rsa_key.pub", confbase);
315 f = ask_and_safe_open(filename, _("public RSA key"), false, "a");
321 fprintf(stderr, _("Appending key to existing contents.\nMake sure only one key is stored in the file.\n"));
323 PEM_write_RSAPublicKey(f, rsa_key);
331 Set all files and paths according to netname
333 static void make_names(void)
336 asprintf(&identname, "tinc.%s", netname);
338 identname = xstrdup("tinc");
341 asprintf(&pidfilename, LOCALSTATEDIR "/run/%s.pid", identname);
344 asprintf(&logfilename, LOCALSTATEDIR "/log/%s.log", identname);
348 asprintf(&confbase, "%s/tinc/%s", CONFDIR, netname);
350 logger(LOG_INFO, _("Both netname and configuration directory given, using the latter..."));
353 asprintf(&confbase, "%s/tinc", CONFDIR);
357 int main(int argc, char **argv, char **envp)
359 program_name = argv[0];
361 setlocale(LC_ALL, "");
362 bindtextdomain(PACKAGE, LOCALEDIR);
366 parse_options(argc, argv, envp);
370 printf(_("%s version %s (built %s %s, protocol %d)\n"), PACKAGE,
371 VERSION, __DATE__, __TIME__, PROT_CURRENT);
372 printf(_("Copyright (C) 1998-2003 Ivo Timmermans, Guus Sliepen and others.\n"
373 "See the AUTHORS file for a complete list.\n\n"
374 "tinc comes with ABSOLUTELY NO WARRANTY. This is free software,\n"
375 "and you are welcome to redistribute it under certain conditions;\n"
376 "see the file COPYING for details.\n"));
385 exit(!kill_other(kill_tincd));
387 openlogger("tinc", LOGMODE_STDERR);
389 /* Lock all pages into memory if requested */
393 if(mlockall(MCL_CURRENT | MCL_FUTURE)) {
394 logger(LOG_ERR, _("System call `%s' failed: %s"), "mlockall",
398 logger(LOG_ERR, _("mlockall() not supported on this platform!"));
405 init_configuration(&config_tree);
407 /* Slllluuuuuuurrrrp! */
409 RAND_load_file("/dev/urandom", 1024);
411 OpenSSL_add_all_algorithms();
414 read_server_config();
415 exit(!keygen(generate_keys));
418 if(!read_server_config())
421 if(lzo_init() != LZO_E_OK) {
422 logger(LOG_ERR, _("Error initializing LZO compressor!"));
427 if(WSAStartup(MAKEWORD(2, 2), &wsa_state)) {
428 logger(LOG_ERR, _("System call `%s' failed: %s"), "WSAStartup", strerror(errno));
437 if(setup_network_connections()) {
442 logger(LOG_ERR, _("Unrecoverable error"));
446 logger(LOG_NOTICE, _("Restarting in %d seconds!"), maxtimeout);
449 logger(LOG_ERR, _("Not restarting."));