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 1.10.4.55 2001/10/28 08:41:19 guus 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>
57 /* The name this program was run with. */
60 /* If nonzero, display usage information and exit. */
63 /* If nonzero, print the version on standard output and exit. */
66 /* If nonzero, it will attempt to kill a running tincd and exit. */
69 /* If nonzero, generate public/private keypair for this host/net. */
70 int generate_keys = 0;
72 /* If nonzero, use null ciphers and skip all key exchanges. */
73 int bypass_security = 0;
75 char *identname; /* program name for syslog */
76 char *pidfilename; /* pid file location */
77 char **g_argv; /* a copy of the cmdline arguments */
78 char **environment; /* A pointer to the environment on
81 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, &show_help, 1 },
87 { "version", no_argument, &show_version, 1 },
88 { "no-detach", no_argument, &do_detach, 0 },
89 { "generate-keys", optional_argument, NULL, 'K'},
90 { "debug", optional_argument, NULL, 'd'},
91 { "bypass-security", no_argument, &bypass_security, 1 },
99 fprintf(stderr, _("Try `%s --help\' for more information.\n"), program_name);
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 printf(_(" -K, --generate-keys[=BITS] Generate public/private RSA keypair.\n"
109 " --help Display this help and exit.\n"
110 " --version Output version information and exit.\n\n"));
111 printf(_("Report bugs to tinc@nl.linux.org.\n"));
117 parse_options(int argc, char **argv, char **envp)
120 int option_index = 0;
122 while((r = getopt_long(argc, argv, "c:Dd::k::n:K::", long_options, &option_index)) != EOF)
126 case 0: /* long option */
128 case 'c': /* config file */
129 confbase = xmalloc(strlen(optarg)+1);
130 strcpy(confbase, optarg);
132 case 'D': /* no detach */
135 case 'd': /* inc debug level */
137 debug_lvl = atoi(optarg);
141 case 'k': /* kill old tincds */
142 kill_tincd = optarg?atoi(optarg):SIGTERM;
144 case 'n': /* net name given */
145 netname = xmalloc(strlen(optarg)+1);
146 strcpy(netname, optarg);
148 case 'K': /* generate public/private keypair */
151 generate_keys = atoi(optarg);
152 if(generate_keys < 512)
154 fprintf(stderr, _("Invalid argument `%s'; BITS must be a number equal to or greater than 512.\n"),
158 generate_keys &= ~7; /* Round it to bytes */
161 generate_keys = 1024;
171 /* This function prettyprints the key generation process */
173 void indicator(int a, int b, void *p)
178 fprintf(stderr, ".");
181 fprintf(stderr, "+");
184 fprintf(stderr, "-");
190 fprintf(stderr, " p\n");
193 fprintf(stderr, " q\n");
196 fprintf(stderr, "?");
200 fprintf(stderr, "?");
205 Generate a public/private RSA keypair, and ask for a file to store
215 fprintf(stderr, _("Generating %d bits keys:\n"), bits);
216 rsa_key = RSA_generate_key(bits, 0xFFFF, indicator, NULL);
220 fprintf(stderr, _("Error during key generation!\n"));
224 fprintf(stderr, _("Done.\n"));
226 get_config_string(lookup_config(config_tree, "Name"), &name);
229 asprintf(&filename, "%s/hosts/%s", confbase, name);
231 asprintf(&filename, "%s/rsa_key.pub", confbase);
233 if((f = ask_and_safe_open(filename, _("public RSA key"), "a")) == NULL)
237 fprintf(stderr, _("Appending key to existing contents.\nMake sure only one key is stored in the file.\n"));
239 PEM_write_RSAPublicKey(f, rsa_key);
243 asprintf(&filename, "%s/rsa_key.priv", confbase);
244 if((f = ask_and_safe_open(filename, _("private RSA key"), "a")) == NULL)
248 fprintf(stderr, _("Appending key to existing contents.\nMake sure only one key is stored in the file.\n"));
250 PEM_write_RSAPrivateKey(f, rsa_key, NULL, NULL, 0, NULL, NULL);
258 Set all files and paths according to netname
260 void make_names(void)
265 asprintf(&pidfilename, LOCALSTATEDIR "/run/tinc.%s.pid", netname);
267 asprintf(&confbase, "%s/tinc/%s", CONFDIR, netname);
269 syslog(LOG_INFO, _("Both netname and configuration directory given, using the latter..."));
271 asprintf(&identname, "tinc.%s", netname);
276 pidfilename = LOCALSTATEDIR "/run/tinc.pid";
278 asprintf(&confbase, "%s/tinc", CONFDIR);
285 main(int argc, char **argv, char **envp)
287 program_name = argv[0];
289 setlocale (LC_ALL, "");
290 bindtextdomain (PACKAGE, LOCALEDIR);
291 textdomain (PACKAGE);
294 parse_options(argc, argv, envp);
298 printf(_("%s version %s (built %s %s, protocol %d)\n"), PACKAGE, VERSION, __DATE__, __TIME__, PROT_CURRENT);
299 printf(_("Copyright (C) 1998-2001 Ivo Timmermans, Guus Sliepen and others.\n"
300 "See the AUTHORS file for a complete list.\n\n"
301 "tinc comes with ABSOLUTELY NO WARRANTY. This is free software,\n"
302 "and you are welcome to redistribute it under certain conditions;\n"
303 "see the file COPYING for details.\n"));
313 fprintf(stderr, _("You must be root to run this program.\n"));
318 openlog("tinc", LOG_CONS, LOG_DAEMON); /* Catch all syslog() calls issued before detaching */
320 openlog("tinc", LOG_PERROR, LOG_DAEMON); /* Catch all syslog() calls issued before detaching */
326 init_configuration(&config_tree);
328 /* Slllluuuuuuurrrrp! */
330 RAND_load_file("/dev/urandom", 1024);
334 read_server_config();
335 exit(keygen(generate_keys));
339 exit(kill_other(kill_tincd));
341 if(read_server_config())
349 if(!setup_network_connections())
355 syslog(LOG_ERR, _("Unrecoverable error"));
360 syslog(LOG_NOTICE, _("Restarting in %d seconds!"), maxtimeout);
365 syslog(LOG_ERR, _("Not restarting."));