+ // Check if we got an umbilical fd from the process that started us
+ char *umbstr = getenv("TINC_UMBILICAL");
+
+ if(umbstr) {
+ umbilical = atoi(umbstr);
+
+ if(fcntl(umbilical, F_GETFL) < 0) {
+ umbilical = 0;
+ }
+
+#ifdef FD_CLOEXEC
+
+ if(umbilical) {
+ fcntl(umbilical, F_SETFD, FD_CLOEXEC);
+ }
+
+#endif
+ }
+
+#endif
+
+ openlogger("tinc", use_logfile ? LOGMODE_FILE : LOGMODE_STDERR);
+
+ g_argv = argv;
+
+ if(getenv("LISTEN_PID") && atoi(getenv("LISTEN_PID")) == getpid()) {
+ do_detach = false;
+ }
+
+#ifdef HAVE_UNSETENV
+ unsetenv("LISTEN_PID");
+#endif
+
+ init_configuration(&config_tree);
+
+ /* Slllluuuuuuurrrrp! */
+
+ gettimeofday(&now, NULL);
+ srand(now.tv_sec + now.tv_usec);
+ crypto_init();
+
+ if(!read_server_config()) {
+ return 1;
+ }
+
+ if(!debug_level) {
+ get_config_int(lookup_config(config_tree, "LogLevel"), &debug_level);
+ }
+
+#ifdef HAVE_LZO
+
+ if(lzo_init() != LZO_E_OK) {
+ logger(DEBUG_ALWAYS, LOG_ERR, "Error initializing LZO compressor!");
+ return 1;
+ }
+
+#endif
+
+#ifdef HAVE_MINGW
+ io_add_event(&stop_io, stop_handler, NULL, WSACreateEvent());
+
+ if(stop_io.event == FALSE) {
+ abort();
+ }
+
+ int result;
+
+ if(!do_detach || !init_service()) {
+ SetConsoleCtrlHandler(console_ctrl_handler, TRUE);
+ result = main2(argc, argv);
+ } else {
+ result = 1;
+ }
+
+ if(WSACloseEvent(stop_io.event) == FALSE) {
+ abort();
+ }
+
+ io_del(&stop_io);
+ return result;
+}
+
+int main2(int argc, char **argv) {
+ (void)argc;
+ (void)argv;
+#endif
+ char *priority = NULL;
+
+ if(!detach()) {
+ return 1;
+ }
+
+#ifdef HAVE_MLOCKALL
+
+ /* Lock all pages into memory if requested.
+ * This has to be done after daemon()/fork() so it works for child.
+ * No need to do that in parent as it's very short-lived. */
+ if(do_mlock && mlockall(MCL_CURRENT | MCL_FUTURE) != 0) {
+ logger(DEBUG_ALWAYS, LOG_ERR, "System call `%s' failed: %s", "mlockall",
+ strerror(errno));
+ return 1;
+ }
+
+#endif
+
+ /* Setup sockets and open device. */
+
+ if(!setup_network()) {
+ goto end;
+ }
+
+ /* Change process priority */
+
+ if(get_config_string(lookup_config(config_tree, "ProcessPriority"), &priority)) {
+ if(!strcasecmp(priority, "Normal")) {
+ if(setpriority(NORMAL_PRIORITY_CLASS) != 0) {
+ logger(DEBUG_ALWAYS, LOG_ERR, "System call `%s' failed: %s", "setpriority", strerror(errno));
+ goto end;
+ }
+ } else if(!strcasecmp(priority, "Low")) {
+ if(setpriority(BELOW_NORMAL_PRIORITY_CLASS) != 0) {
+ logger(DEBUG_ALWAYS, LOG_ERR, "System call `%s' failed: %s", "setpriority", strerror(errno));
+ goto end;
+ }
+ } else if(!strcasecmp(priority, "High")) {
+ if(setpriority(HIGH_PRIORITY_CLASS) != 0) {
+ logger(DEBUG_ALWAYS, LOG_ERR, "System call `%s' failed: %s", "setpriority", strerror(errno));
+ goto end;
+ }
+ } else {
+ logger(DEBUG_ALWAYS, LOG_ERR, "Invalid priority `%s`!", priority);
+ goto end;
+ }
+ }
+
+ /* drop privileges */
+ if(!drop_privs()) {
+ goto end;
+ }
+
+ /* Start main loop. It only exits when tinc is killed. */
+
+ logger(DEBUG_ALWAYS, LOG_NOTICE, "Ready");
+
+ if(umbilical) { // snip!
+ write(umbilical, "", 1);
+ close(umbilical);
+ umbilical = 0;
+ }
+
+ try_outgoing_connections();
+
+ status = main_loop();
+
+ /* Shutdown properly. */
+
+end:
+ close_network_connections();
+
+ logger(DEBUG_ALWAYS, LOG_NOTICE, "Terminating");
+
+ free(priority);
+
+ crypto_exit();
+
+ return status;