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 1.10.4.77 2003/07/28 22:06:09 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 <openssl/rand.h>
35 #include <openssl/rsa.h>
36 #include <openssl/pem.h>
37 #include <openssl/evp.h>
50 /* The name this program was run with. */
51 char *program_name = NULL;
53 /* If nonzero, display usage information and exit. */
54 bool show_help = false;
56 /* If nonzero, print the version on standard output and exit. */
57 bool show_version = false;
59 /* If nonzero, it will attempt to kill a running tincd and exit. */
62 /* If nonzero, generate public/private keypair for this host/net. */
63 int generate_keys = 0;
65 /* If nonzero, use null ciphers and skip all key exchanges. */
66 bool bypass_security = false;
68 /* If nonzero, disable swapping for this process. */
69 bool do_mlock = false;
71 /* If nonzero, write log entries to a separate file. */
72 bool use_logfile = false;
74 char *identname = NULL; /* program name for syslog */
75 char *pidfilename = NULL; /* pid file location */
76 char *logfilename = NULL; /* log file location */
77 char **g_argv; /* a copy of the cmdline arguments */
78 char **environment; /* A pointer to the environment on startup */
80 static struct option const long_options[] = {
81 {"config", required_argument, NULL, 'c'},
82 {"kill", optional_argument, NULL, 'k'},
83 {"net", required_argument, NULL, 'n'},
84 {"help", no_argument, NULL, 1},
85 {"version", no_argument, NULL, 2},
86 {"no-detach", no_argument, NULL, 'D'},
87 {"generate-keys", optional_argument, NULL, 'K'},
88 {"debug", optional_argument, NULL, 'd'},
89 {"bypass-security", no_argument, NULL, 3},
90 {"mlock", no_argument, NULL, 'L'},
91 {"logfile", optional_argument, NULL, 4},
92 {"pidfile", required_argument, NULL, 5},
96 static void usage(bool status)
99 fprintf(stderr, _("Try `%s --help\' for more information.\n"),
102 printf(_("Usage: %s [option]...\n\n"), program_name);
103 printf(_(" -c, --config=DIR Read configuration options from DIR.\n"
104 " -D, --no-detach Don't fork and detach.\n"
105 " -d, --debug[=LEVEL] Increase debug level or set it to LEVEL.\n"
106 " -k, --kill[=SIGNAL] Attempt to kill a running tincd and exit.\n"
107 " -n, --net=NETNAME Connect to net NETNAME.\n"
108 " -K, --generate-keys[=BITS] Generate public/private RSA keypair.\n"
109 " -L, --mlock Lock tinc into main memory.\n"
110 " --logfile[=FILENAME] Write log entries to a logfile.\n"
111 " --pidfile=FILENAME Write PID to FILENAME.\n"
112 " --help Display this help and exit.\n"
113 " --version Output version information and exit.\n\n"));
114 printf(_("Report bugs to tinc@nl.linux.org.\n"));
120 static void parse_options(int argc, char **argv, char **envp)
123 int option_index = 0;
125 while((r = getopt_long(argc, argv, "c:DLd::k::n:K::", long_options, &option_index)) != EOF) {
127 case 0: /* long option */
130 case 'c': /* config file */
131 confbase = xstrdup(optarg);
134 case 'D': /* no detach */
138 case 'L': /* no detach */
142 case 'd': /* inc debug level */
144 debug_level = atoi(optarg);
149 case 'k': /* kill old tincds */
152 if(!strcasecmp(optarg, "HUP"))
154 else if(!strcasecmp(optarg, "TERM"))
155 kill_tincd = SIGTERM;
156 else if(!strcasecmp(optarg, "KILL"))
157 kill_tincd = SIGKILL;
158 else if(!strcasecmp(optarg, "USR1"))
159 kill_tincd = SIGUSR1;
160 else if(!strcasecmp(optarg, "USR2"))
161 kill_tincd = SIGUSR2;
162 else if(!strcasecmp(optarg, "WINCH"))
163 kill_tincd = SIGWINCH;
164 else if(!strcasecmp(optarg, "INT"))
166 else if(!strcasecmp(optarg, "ALRM"))
167 kill_tincd = SIGALRM;
169 kill_tincd = atoi(optarg);
172 fprintf(stderr, _("Invalid argument `%s'; SIGNAL must be a number or one of HUP, TERM, KILL, USR1, USR2, WINCH, INT or ALRM.\n"),
178 kill_tincd = SIGTERM;
182 case 'n': /* net name given */
183 netname = xstrdup(optarg);
186 case 'K': /* generate public/private keypair */
188 generate_keys = atoi(optarg);
190 if(generate_keys < 512) {
191 fprintf(stderr, _("Invalid argument `%s'; BITS must be a number equal to or greater than 512.\n"),
196 generate_keys &= ~7; /* Round it to bytes */
198 generate_keys = 1024;
201 case 1: /* show help */
205 case 2: /* show version */
209 case 3: /* bypass security */
210 bypass_security = true;
213 case 4: /* write log entries to a file */
216 logfilename = xstrdup(optarg);
219 case 5: /* write PID to a file */
220 pidfilename = xstrdup(optarg);
232 /* This function prettyprints the key generation process */
234 static void indicator(int a, int b, void *p)
238 fprintf(stderr, ".");
242 fprintf(stderr, "+");
246 fprintf(stderr, "-");
252 fprintf(stderr, " p\n");
256 fprintf(stderr, " q\n");
260 fprintf(stderr, "?");
265 fprintf(stderr, "?");
270 Generate a public/private RSA keypair, and ask for a file to store
273 static bool keygen(int bits)
280 fprintf(stderr, _("Generating %d bits keys:\n"), bits);
281 rsa_key = RSA_generate_key(bits, 0xFFFF, indicator, NULL);
284 fprintf(stderr, _("Error during key generation!\n"));
287 fprintf(stderr, _("Done.\n"));
289 asprintf(&filename, "%s/rsa_key.priv", confbase);
290 f = ask_and_safe_open(filename, _("private RSA key"), true, "a");
296 fprintf(stderr, _("Appending key to existing contents.\nMake sure only one key is stored in the file.\n"));
298 PEM_write_RSAPrivateKey(f, rsa_key, NULL, NULL, 0, NULL, NULL);
302 get_config_string(lookup_config(config_tree, "Name"), &name);
305 asprintf(&filename, "%s/hosts/%s", confbase, name);
307 asprintf(&filename, "%s/rsa_key.pub", confbase);
309 f = ask_and_safe_open(filename, _("public RSA key"), false, "a");
315 fprintf(stderr, _("Appending key to existing contents.\nMake sure only one key is stored in the file.\n"));
317 PEM_write_RSAPublicKey(f, rsa_key);
325 Set all files and paths according to netname
327 static void make_names(void)
330 asprintf(&identname, "tinc.%s", netname);
332 identname = xstrdup("tinc");
335 asprintf(&pidfilename, LOCALSTATEDIR "/run/%s.pid", identname);
338 asprintf(&logfilename, LOCALSTATEDIR "/log/%s.log", identname);
342 asprintf(&confbase, "%s/tinc/%s", CONFDIR, netname);
344 logger(LOG_INFO, _("Both netname and configuration directory given, using the latter..."));
347 asprintf(&confbase, "%s/tinc", CONFDIR);
351 int main(int argc, char **argv, char **envp)
353 program_name = argv[0];
355 setlocale(LC_ALL, "");
356 bindtextdomain(PACKAGE, LOCALEDIR);
360 parse_options(argc, argv, envp);
364 printf(_("%s version %s (built %s %s, protocol %d)\n"), PACKAGE,
365 VERSION, __DATE__, __TIME__, PROT_CURRENT);
366 printf(_("Copyright (C) 1998-2003 Ivo Timmermans, Guus Sliepen and others.\n"
367 "See the AUTHORS file for a complete list.\n\n"
368 "tinc comes with ABSOLUTELY NO WARRANTY. This is free software,\n"
369 "and you are welcome to redistribute it under certain conditions;\n"
370 "see the file COPYING for details.\n"));
379 exit(!kill_other(kill_tincd));
381 openlogger("tinc", LOGMODE_STDERR);
383 /* Lock all pages into memory if requested */
387 if(mlockall(MCL_CURRENT | MCL_FUTURE)) {
388 logger(LOG_ERR, _("System call `%s' failed: %s"), "mlockall",
392 logger(LOG_ERR, _("mlockall() not supported on this platform!"));
399 init_configuration(&config_tree);
401 /* Slllluuuuuuurrrrp! */
403 RAND_load_file("/dev/urandom", 1024);
405 OpenSSL_add_all_algorithms();
408 read_server_config();
409 exit(!keygen(generate_keys));
412 if(!read_server_config())
415 if(lzo_init() != LZO_E_OK) {
416 logger(LOG_ERR, _("Error initializing LZO compressor!"));
424 if(setup_network_connections()) {
429 logger(LOG_ERR, _("Unrecoverable error"));
433 logger(LOG_NOTICE, _("Restarting in %d seconds!"), maxtimeout);
436 logger(LOG_ERR, _("Not restarting."));