2 tincd.c -- the main file for tincd
3 Copyright (C) 1998-2005 Ivo Timmermans
4 2000-2009 Guus Sliepen <guus@tinc-vpn.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.
25 /* Darwin (MacOS/X) needs the following definition... */
26 #ifndef _P1003_1B_VISIBLE
27 #define _P1003_1B_VISIBLE
30 #ifdef HAVE_SYS_MMAN_H
56 /* The name this program was run with. */
57 char *program_name = NULL;
59 /* If nonzero, display usage information and exit. */
60 bool show_help = false;
62 /* If nonzero, print the version on standard output and exit. */
63 bool show_version = false;
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, chroot to netdir after startup. */
72 static bool do_chroot = false;
74 /* If !NULL, do setuid to given user after startup */
75 static const char *switchuser = NULL;
77 /* If nonzero, write log entries to a separate file. */
78 bool use_logfile = false;
80 char *identname = NULL; /* program name for syslog */
81 char *controlsocketname = NULL; /* control socket location */
82 char *logfilename = NULL; /* log file location */
83 char **g_argv; /* a copy of the cmdline arguments */
87 static struct option const long_options[] = {
88 {"config", required_argument, NULL, 'c'},
89 {"net", required_argument, NULL, 'n'},
90 {"help", no_argument, NULL, 1},
91 {"version", no_argument, NULL, 2},
92 {"no-detach", no_argument, NULL, 'D'},
93 {"debug", optional_argument, NULL, 'd'},
94 {"bypass-security", no_argument, NULL, 3},
95 {"mlock", no_argument, NULL, 'L'},
96 {"chroot", no_argument, NULL, 'R'},
97 {"user", required_argument, NULL, 'U'},
98 {"logfile", optional_argument, NULL, 4},
99 {"controlsocket", required_argument, NULL, 5},
104 static struct WSAData wsa_state;
105 CRITICAL_SECTION mutex;
108 static void usage(bool status)
111 fprintf(stderr, _("Try `%s --help\' for more information.\n"),
114 printf(_("Usage: %s [option]...\n\n"), program_name);
115 printf(_( " -c, --config=DIR Read configuration options from DIR.\n"
116 " -D, --no-detach Don't fork and detach.\n"
117 " -d, --debug[=LEVEL] Increase debug level or set it to LEVEL.\n"
118 " -n, --net=NETNAME Connect to net NETNAME.\n"
119 " -L, --mlock Lock tinc into main memory.\n"
120 " --logfile[=FILENAME] Write log entries to a logfile.\n"
121 " --controlsocket=FILENAME Open control socket at FILENAME.\n"
122 " --bypass-security Disables meta protocol security, for debugging.\n"
123 " -R, --chroot chroot to NET dir at startup.\n"
124 " -U, --user=USER setuid to given USER at startup.\n" " --help Display this help and exit.\n"
125 " --version Output version information and exit.\n\n"));
126 printf(_("Report bugs to tinc@tinc-vpn.org.\n"));
130 static bool parse_options(int argc, char **argv)
133 int option_index = 0;
135 while((r = getopt_long(argc, argv, "c:DLd::n:RU:", long_options, &option_index)) != EOF) {
137 case 0: /* long option */
140 case 'c': /* config file */
141 confbase = xstrdup(optarg);
144 case 'D': /* no detach */
148 case 'L': /* no detach */
149 #ifndef HAVE_MLOCKALL
150 logger(LOG_ERR, _("%s not supported on this platform"), "mlockall()");
157 case 'd': /* inc debug level */
159 debug_level = atoi(optarg);
164 case 'n': /* net name given */
165 netname = xstrdup(optarg);
168 case 'R': /* chroot to NETNAME dir */
172 case 'U': /* setuid to USER */
176 case 1: /* show help */
180 case 2: /* show version */
184 case 3: /* bypass security */
185 bypass_security = true;
188 case 4: /* write log entries to a file */
191 logfilename = xstrdup(optarg);
194 case 5: /* open control socket here */
195 controlsocketname = xstrdup(optarg);
211 Set all files and paths according to netname
213 static void make_names(void)
217 char installdir[1024] = "";
218 long len = sizeof installdir;
222 xasprintf(&identname, "tinc.%s", netname);
224 identname = xstrdup("tinc");
227 if(!RegOpenKeyEx(HKEY_LOCAL_MACHINE, "SOFTWARE\\tinc", 0, KEY_READ, &key)) {
228 if(!RegQueryValueEx(key, NULL, 0, 0, installdir, &len)) {
230 xasprintf(&logfilename, "%s/log/%s.log", identname);
233 xasprintf(&confbase, "%s/%s", installdir, netname);
235 xasprintf(&confbase, "%s", installdir);
244 if(!controlsocketname)
245 xasprintf(&controlsocketname, "%s/run/%s.control/socket", LOCALSTATEDIR, identname);
248 xasprintf(&logfilename, LOCALSTATEDIR "/log/%s.log", identname);
252 xasprintf(&confbase, CONFDIR "/tinc/%s", netname);
254 logger(LOG_INFO, _("Both netname and configuration directory given, using the latter..."));
257 xasprintf(&confbase, CONFDIR "/tinc");
261 static void free_names() {
262 if (identname) free(identname);
263 if (netname) free(netname);
264 if (controlsocketname) free(controlsocketname);
265 if (logfilename) free(logfilename);
266 if (confbase) free(confbase);
269 static bool drop_privs() {
272 logger(LOG_ERR, _("%s not supported on this platform"), "-U");
276 logger(LOG_ERR, _("%s not supported on this platform"), "-R");
282 struct passwd *pw = getpwnam(switchuser);
284 logger(LOG_ERR, _("unknown user `%s'"), switchuser);
288 if (initgroups(switchuser, pw->pw_gid) != 0 ||
289 setgid(pw->pw_gid) != 0) {
290 logger(LOG_ERR, _("System call `%s' failed: %s"),
291 "initgroups", strerror(errno));
298 tzset(); /* for proper timestamps in logs */
299 if (chroot(confbase) != 0 || chdir("/") != 0) {
300 logger(LOG_ERR, _("System call `%s' failed: %s"),
301 "chroot", strerror(errno));
305 confbase = xstrdup("");
308 if (setuid(uid) != 0) {
309 logger(LOG_ERR, _("System call `%s' failed: %s"),
310 "setuid", strerror(errno));
318 # define setpriority(level) SetPriorityClass(GetCurrentProcess(), level)
320 # define NORMAL_PRIORITY_CLASS 0
321 # define BELOW_NORMAL_PRIORITY_CLASS 10
322 # define HIGH_PRIORITY_CLASS -10
323 # define setpriority(level) nice(level)
326 int main(int argc, char **argv)
328 program_name = argv[0];
330 setlocale(LC_ALL, "");
331 bindtextdomain(PACKAGE, LOCALEDIR);
334 if(!parse_options(argc, argv))
340 printf(_("%s version %s (built %s %s, protocol %d)\n"), PACKAGE,
341 VERSION, __DATE__, __TIME__, PROT_CURRENT);
342 printf(_("Copyright (C) 1998-2009 Ivo Timmermans, Guus Sliepen and others.\n"
343 "See the AUTHORS file for a complete list.\n\n"
344 "tinc comes with ABSOLUTELY NO WARRANTY. This is free software,\n"
345 "and you are welcome to redistribute it under certain conditions;\n"
346 "see the file COPYING for details.\n"));
356 openlogger("tinc", use_logfile?LOGMODE_FILE:LOGMODE_STDERR);
359 logger(LOG_ERR, _("Error initializing libevent!"));
368 init_configuration(&config_tree);
370 /* Slllluuuuuuurrrrp! */
375 if(!read_server_config())
378 if(lzo_init() != LZO_E_OK) {
379 logger(LOG_ERR, _("Error initializing LZO compressor!"));
384 if(WSAStartup(MAKEWORD(2, 2), &wsa_state)) {
385 logger(LOG_ERR, _("System call `%s' failed: %s"), "WSAStartup", winerror(GetLastError()));
389 if(!do_detach || !init_service())
390 return main2(argc, argv);
395 int main2(int argc, char **argv)
397 InitializeCriticalSection(&mutex);
398 EnterCriticalSection(&mutex);
405 /* Lock all pages into memory if requested.
406 * This has to be done after daemon()/fork() so it works for child.
407 * No need to do that in parent as it's very short-lived. */
408 if(do_mlock && mlockall(MCL_CURRENT | MCL_FUTURE) != 0) {
409 logger(LOG_ERR, _("System call `%s' failed: %s"), "mlockall",
415 /* Setup sockets and open device. */
420 /* Initiate all outgoing connections. */
422 try_outgoing_connections();
424 /* Change process priority */
428 if(get_config_string(lookup_config(config_tree, "ProcessPriority"), &priority)) {
429 if(!strcasecmp(priority, "Normal"))
430 setpriority(NORMAL_PRIORITY_CLASS);
431 else if(!strcasecmp(priority, "Low"))
432 setpriority(BELOW_NORMAL_PRIORITY_CLASS);
433 else if(!strcasecmp(priority, "High"))
434 setpriority(HIGH_PRIORITY_CLASS);
436 logger(LOG_ERR, _("Invalid priority `%s`!"), priority);
441 /* drop privileges */
445 /* Start main loop. It only exits when tinc is killed. */
447 status = main_loop();
449 /* Shutdown properly. */
454 close_network_connections();
457 logger(LOG_NOTICE, _("Terminating"));
465 exit_configuration(&config_tree);