2 tincd.c -- the main file for tincd
3 Copyright (C) 1998-2001 Ivo Timmermans <itimmermans@bigfoot.com>
4 2000,2001 Guus Sliepen <guus@sliepen.warande.net>
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 1.10.4.56 2001/11/16 22:40:26 zarq Exp $
30 #include <sys/types.h>
37 #ifdef HAVE_SYS_IOCTL_H
38 # include <sys/ioctl.h>
41 #include <openssl/rand.h>
42 #include <openssl/rsa.h>
43 #include <openssl/pem.h>
56 /* The name this program was run with. */
59 /* If nonzero, display usage information and exit. */
62 /* If nonzero, print the version on standard output and exit. */
65 /* If nonzero, it will attempt to kill a running tincd and exit. */
68 /* If nonzero, generate public/private keypair for this host/net. */
69 int generate_keys = 0;
71 /* If nonzero, use null ciphers and skip all key exchanges. */
72 int bypass_security = 0;
74 char *identname; /* program name for syslog */
75 char *pidfilename; /* pid file location */
76 char **g_argv; /* a copy of the cmdline arguments */
77 char **environment; /* A pointer to the environment on
80 static struct option const long_options[] =
82 { "config", required_argument, NULL, 'c' },
83 { "kill", optional_argument, NULL, 'k' },
84 { "net", required_argument, NULL, 'n' },
85 { "help", no_argument, &show_help, 1 },
86 { "version", no_argument, &show_version, 1 },
87 { "no-detach", no_argument, &do_detach, 0 },
88 { "generate-keys", optional_argument, NULL, 'K'},
89 { "debug", optional_argument, NULL, 'd'},
90 { "bypass-security", no_argument, &bypass_security, 1 },
98 fprintf(stderr, _("Try `%s --help\' for more information.\n"), program_name);
101 printf(_("Usage: %s [option]...\n\n"), program_name);
102 printf(_(" -c, --config=DIR Read configuration options from DIR.\n"
103 " -D, --no-detach Don't fork and detach.\n"
104 " -d, --debug[=LEVEL] Increase debug level or set it to LEVEL.\n"
105 " -k, --kill[=SIGNAL] Attempt to kill a running tincd and exit.\n"
106 " -n, --net=NETNAME Connect to net NETNAME.\n"));
107 printf(_(" -K, --generate-keys[=BITS] Generate public/private RSA keypair.\n"
108 " --help Display this help and exit.\n"
109 " --version Output version information and exit.\n\n"));
110 printf(_("Report bugs to tinc@nl.linux.org.\n"));
116 parse_options(int argc, char **argv, char **envp)
119 int option_index = 0;
121 while((r = getopt_long(argc, argv, "c:Dd::k::n:K::", long_options, &option_index)) != EOF)
125 case 0: /* long option */
127 case 'c': /* config file */
128 confbase = xmalloc(strlen(optarg)+1);
129 strcpy(confbase, optarg);
131 case 'D': /* no detach */
134 case 'd': /* inc debug level */
136 debug_lvl = atoi(optarg);
140 case 'k': /* kill old tincds */
141 kill_tincd = optarg?atoi(optarg):SIGTERM;
143 case 'n': /* net name given */
144 netname = xmalloc(strlen(optarg)+1);
145 strcpy(netname, optarg);
147 case 'K': /* generate public/private keypair */
150 generate_keys = atoi(optarg);
151 if(generate_keys < 512)
153 fprintf(stderr, _("Invalid argument `%s'; BITS must be a number equal to or greater than 512.\n"),
157 generate_keys &= ~7; /* Round it to bytes */
160 generate_keys = 1024;
170 /* This function prettyprints the key generation process */
172 void indicator(int a, int b, void *p)
177 fprintf(stderr, ".");
180 fprintf(stderr, "+");
183 fprintf(stderr, "-");
189 fprintf(stderr, " p\n");
192 fprintf(stderr, " q\n");
195 fprintf(stderr, "?");
199 fprintf(stderr, "?");
204 Generate a public/private RSA keypair, and ask for a file to store
214 fprintf(stderr, _("Generating %d bits keys:\n"), bits);
215 rsa_key = RSA_generate_key(bits, 0xFFFF, indicator, NULL);
219 fprintf(stderr, _("Error during key generation!\n"));
223 fprintf(stderr, _("Done.\n"));
225 get_config_string(lookup_config(config_tree, "Name"), &name);
228 asprintf(&filename, "%s/hosts/%s", confbase, name);
230 asprintf(&filename, "%s/rsa_key.pub", confbase);
232 if((f = ask_and_safe_open(filename, _("public RSA key"), "a")) == NULL)
236 fprintf(stderr, _("Appending key to existing contents.\nMake sure only one key is stored in the file.\n"));
238 PEM_write_RSAPublicKey(f, rsa_key);
242 asprintf(&filename, "%s/rsa_key.priv", confbase);
243 if((f = ask_and_safe_open(filename, _("private RSA key"), "a")) == NULL)
247 fprintf(stderr, _("Appending key to existing contents.\nMake sure only one key is stored in the file.\n"));
249 PEM_write_RSAPrivateKey(f, rsa_key, NULL, NULL, 0, NULL, NULL);
257 Set all files and paths according to netname
259 void make_names(void)
264 asprintf(&pidfilename, LOCALSTATEDIR "/run/tinc.%s.pid", netname);
266 asprintf(&confbase, "%s/tinc/%s", CONFDIR, netname);
268 syslog(LOG_INFO, _("Both netname and configuration directory given, using the latter..."));
270 asprintf(&identname, "tinc.%s", netname);
275 pidfilename = LOCALSTATEDIR "/run/tinc.pid";
277 asprintf(&confbase, "%s/tinc", CONFDIR);
284 main(int argc, char **argv, char **envp)
286 program_name = argv[0];
288 setlocale (LC_ALL, "");
289 bindtextdomain (PACKAGE, LOCALEDIR);
290 textdomain (PACKAGE);
293 parse_options(argc, argv, envp);
297 printf(_("%s version %s (built %s %s, protocol %d)\n"), PACKAGE, VERSION, __DATE__, __TIME__, PROT_CURRENT);
298 printf(_("Copyright (C) 1998-2001 Ivo Timmermans, Guus Sliepen and others.\n"
299 "See the AUTHORS file for a complete list.\n\n"
300 "tinc comes with ABSOLUTELY NO WARRANTY. This is free software,\n"
301 "and you are welcome to redistribute it under certain conditions;\n"
302 "see the file COPYING for details.\n"));
312 fprintf(stderr, _("You must be root to run this program.\n"));
317 openlog("tinc", LOG_CONS, LOG_DAEMON); /* Catch all syslog() calls issued before detaching */
319 openlog("tinc", LOG_PERROR, LOG_DAEMON); /* Catch all syslog() calls issued before detaching */
325 init_configuration(&config_tree);
327 /* Slllluuuuuuurrrrp! */
329 RAND_load_file("/dev/urandom", 1024);
333 read_server_config();
334 exit(keygen(generate_keys));
338 exit(kill_other(kill_tincd));
340 if(read_server_config())
348 if(!setup_network_connections())
354 syslog(LOG_ERR, _("Unrecoverable error"));
359 syslog(LOG_NOTICE, _("Restarting in %d seconds!"), maxtimeout);
364 syslog(LOG_ERR, _("Not restarting."));