X-Git-Url: https://tinc-vpn.org/git/browse?p=tinc;a=blobdiff_plain;f=src%2Ftincd.c;h=dbf6bc82ce083301888a531b9600c9727aa1a3d0;hp=f075168d2df5de2890b6218bffa4e9e650dfcdc8;hb=6c0584c55b99dd9814fed5c13536d831b3e5317e;hpb=5672863e59e6a114ac6b66de98254b14266c0e61 diff --git a/src/tincd.c b/src/tincd.c index f075168d..dbf6bc82 100644 --- a/src/tincd.c +++ b/src/tincd.c @@ -1,7 +1,7 @@ /* tincd.c -- the main file for tincd Copyright (C) 1998-2005 Ivo Timmermans - 2000-2011 Guus Sliepen + 2000-2018 Guus Sliepen 2008 Max Rijevski 2009 Michael Tokarev 2010 Julien Muchembled @@ -33,12 +33,6 @@ #include #endif -#include -#include -#include -#include -#include - #ifdef HAVE_LZO #include LZO1X_H #endif @@ -49,100 +43,100 @@ #include #endif -#include -#include "pidfile.h" - #include "conf.h" +#include "control.h" +#include "crypto.h" #include "device.h" +#include "event.h" #include "logger.h" +#include "names.h" #include "net.h" #include "netutl.h" #include "process.h" #include "protocol.h" #include "utils.h" #include "xalloc.h" - -/* The name this program was run with. */ -char *program_name = NULL; +#include "version.h" /* If nonzero, display usage information and exit. */ -bool show_help = false; +static bool show_help = false; /* If nonzero, print the version on standard output and exit. */ -bool show_version = false; - -/* If nonzero, it will attempt to kill a running tincd and exit. */ -int kill_tincd = 0; - -/* If nonzero, generate public/private keypair for this host/net. */ -int generate_keys = 0; +static bool show_version = false; /* If nonzero, use null ciphers and skip all key exchanges. */ bool bypass_security = false; +#ifdef HAVE_MLOCKALL /* If nonzero, disable swapping for this process. */ -bool do_mlock = false; +static bool do_mlock = false; +#endif +#ifndef HAVE_MINGW /* If nonzero, chroot to netdir after startup. */ static bool do_chroot = false; /* If !NULL, do setuid to given user after startup */ static const char *switchuser = NULL; +#endif /* If nonzero, write log entries to a separate file. */ bool use_logfile = false; -char *identname = NULL; /* program name for syslog */ -char *pidfilename = NULL; /* pid file location */ -char *logfilename = NULL; /* log file location */ -char **g_argv; /* a copy of the cmdline arguments */ +/* If nonzero, use syslog instead of stderr in no-detach mode. */ +bool use_syslog = false; -static int status; +char **g_argv; /* a copy of the cmdline arguments */ + +static int status = 1; static struct option const long_options[] = { {"config", required_argument, NULL, 'c'}, - {"kill", optional_argument, NULL, 'k'}, {"net", required_argument, NULL, 'n'}, {"help", no_argument, NULL, 1}, {"version", no_argument, NULL, 2}, {"no-detach", no_argument, NULL, 'D'}, - {"generate-keys", optional_argument, NULL, 'K'}, {"debug", optional_argument, NULL, 'd'}, {"bypass-security", no_argument, NULL, 3}, {"mlock", no_argument, NULL, 'L'}, {"chroot", no_argument, NULL, 'R'}, {"user", required_argument, NULL, 'U'}, {"logfile", optional_argument, NULL, 4}, + {"syslog", no_argument, NULL, 's'}, {"pidfile", required_argument, NULL, 5}, + {"option", required_argument, NULL, 'o'}, {NULL, 0, NULL, 0} }; #ifdef HAVE_MINGW static struct WSAData wsa_state; -CRITICAL_SECTION mutex; int main2(int argc, char **argv); #endif static void usage(bool status) { if(status) fprintf(stderr, "Try `%s --help\' for more information.\n", - program_name); + program_name); else { printf("Usage: %s [option]...\n\n", program_name); - printf(" -c, --config=DIR Read configuration options from DIR.\n" - " -D, --no-detach Don't fork and detach.\n" - " -d, --debug[=LEVEL] Increase debug level or set it to LEVEL.\n" - " -k, --kill[=SIGNAL] Attempt to kill a running tincd and exit.\n" - " -n, --net=NETNAME Connect to net NETNAME.\n" - " -K, --generate-keys[=BITS] Generate public/private RSA keypair.\n" - " -L, --mlock Lock tinc into main memory.\n" - " --logfile[=FILENAME] Write log entries to a logfile.\n" - " --pidfile=FILENAME Write PID to FILENAME.\n" - " -o [HOST.]KEY=VALUE Set global/host configuration value.\n" - " -R, --chroot chroot to NET dir at startup.\n" - " -U, --user=USER setuid to given USER at startup.\n" - " --help Display this help and exit.\n" - " --version Output version information and exit.\n\n"); + printf(" -c, --config=DIR Read configuration options from DIR.\n" + " -D, --no-detach Don't fork and detach.\n" + " -d, --debug[=LEVEL] Increase debug level or set it to LEVEL.\n" + " -n, --net=NETNAME Connect to net NETNAME.\n" +#ifdef HAVE_MLOCKALL + " -L, --mlock Lock tinc into main memory.\n" +#endif + " --logfile[=FILENAME] Write log entries to a logfile.\n" + " -s --syslog Use syslog instead of stderr with --no-detach.\n" + " --pidfile=FILENAME Write PID and control socket cookie to FILENAME.\n" + " --bypass-security Disables meta protocol security, for debugging.\n" + " -o, --option[HOST.]KEY=VALUE Set global/host configuration value.\n" +#ifndef HAVE_MINGW + " -R, --chroot chroot to NET dir at startup.\n" + " -U, --user=USER setuid to given USER at startup.\n" +#endif + " --help Display this help and exit.\n" + " --version Output version information and exit.\n\n"); printf("Report bugs to tinc@tinc-vpn.org.\n"); } } @@ -155,356 +149,213 @@ static bool parse_options(int argc, char **argv) { cmdline_conf = list_alloc((list_action_t)free_config); - while((r = getopt_long(argc, argv, "c:DLd::k::n:o:K::RU:", long_options, &option_index)) != EOF) { - switch (r) { - case 0: /* long option */ - break; + while((r = getopt_long(argc, argv, "c:DLd::n:so:RU:", long_options, &option_index)) != EOF) { + switch(r) { + case 0: /* long option */ + break; - case 'c': /* config file */ - confbase = xstrdup(optarg); - break; + case 'c': /* config file */ + confbase = xstrdup(optarg); + break; - case 'D': /* no detach */ - do_detach = false; - break; + case 'D': /* no detach */ + do_detach = false; + break; - case 'L': /* no detach */ + case 'L': /* no detach */ #ifndef HAVE_MLOCKALL - logger(LOG_ERR, "%s not supported on this platform", "mlockall()"); - return false; -#else - do_mlock = true; - break; -#endif - - case 'd': /* inc debug level */ - if(optarg) - debug_level = atoi(optarg); - else - debug_level++; - break; - - case 'k': /* kill old tincds */ -#ifndef HAVE_MINGW - if(optarg) { - if(!strcasecmp(optarg, "HUP")) - kill_tincd = SIGHUP; - else if(!strcasecmp(optarg, "TERM")) - kill_tincd = SIGTERM; - else if(!strcasecmp(optarg, "KILL")) - kill_tincd = SIGKILL; - else if(!strcasecmp(optarg, "USR1")) - kill_tincd = SIGUSR1; - else if(!strcasecmp(optarg, "USR2")) - kill_tincd = SIGUSR2; - else if(!strcasecmp(optarg, "WINCH")) - kill_tincd = SIGWINCH; - else if(!strcasecmp(optarg, "INT")) - kill_tincd = SIGINT; - else if(!strcasecmp(optarg, "ALRM")) - kill_tincd = SIGALRM; - else if(!strcasecmp(optarg, "ABRT")) - kill_tincd = SIGABRT; - else { - kill_tincd = atoi(optarg); - - if(!kill_tincd) { - fprintf(stderr, "Invalid argument `%s'; SIGNAL must be a number or one of HUP, TERM, KILL, USR1, USR2, WINCH, INT or ALRM.\n", - optarg); - usage(true); - return false; - } - } - } else - kill_tincd = SIGTERM; + logger(DEBUG_ALWAYS, LOG_ERR, "The %s option is not supported on this platform.", argv[optind - 1]); + return false; #else - kill_tincd = 1; + do_mlock = true; + break; #endif - break; - - case 'n': /* net name given */ - /* netname "." is special: a "top-level name" */ - netname = strcmp(optarg, ".") != 0 ? - xstrdup(optarg) : NULL; - break; - - case 'o': /* option */ - cfg = parse_config_line(optarg, NULL, ++lineno); - if (!cfg) - return false; - list_insert_tail(cmdline_conf, cfg); - break; - - case 'K': /* generate public/private keypair */ - if(optarg) { - generate_keys = atoi(optarg); - - if(generate_keys < 512) { - fprintf(stderr, "Invalid argument `%s'; BITS must be a number equal to or greater than 512.\n", - optarg); - usage(true); - return false; - } - - generate_keys &= ~7; /* Round it to bytes */ - } else - generate_keys = 2048; - break; - - case 'R': /* chroot to NETNAME dir */ - do_chroot = true; - break; - - case 'U': /* setuid to USER */ - switchuser = optarg; - break; - - case 1: /* show help */ - show_help = true; - break; - - case 2: /* show version */ - show_version = true; - break; - - case 3: /* bypass security */ - bypass_security = true; - break; - - case 4: /* write log entries to a file */ - use_logfile = true; - if(optarg) - logfilename = xstrdup(optarg); - break; - - case 5: /* write PID to a file */ - pidfilename = xstrdup(optarg); - break; - - case '?': - usage(true); - return false; - default: - break; - } - } - - return true; -} + case 'd': /* increase debug level */ + if(!optarg && optind < argc && *argv[optind] != '-') { + optarg = argv[optind++]; + } -/* This function prettyprints the key generation process */ + if(optarg) { + debug_level = atoi(optarg); + } else { + debug_level++; + } -static void indicator(int a, int b, void *p) { - switch (a) { - case 0: - fprintf(stderr, "."); break; - case 1: - fprintf(stderr, "+"); + case 'n': /* net name given */ + netname = xstrdup(optarg); break; - case 2: - fprintf(stderr, "-"); + case 's': /* syslog */ + use_logfile = false; + use_syslog = true; break; - case 3: - switch (b) { - case 0: - fprintf(stderr, " p\n"); - break; + case 'o': /* option */ + cfg = parse_config_line(optarg, NULL, ++lineno); - case 1: - fprintf(stderr, " q\n"); - break; - - default: - fprintf(stderr, "?"); + if(!cfg) { + return false; } + + list_insert_tail(cmdline_conf, cfg); break; - default: - fprintf(stderr, "?"); - } -} +#ifdef HAVE_MINGW -/* - Generate a public/private RSA keypair, and ask for a file to store - them in. -*/ -static bool keygen(int bits) { - RSA *rsa_key; - FILE *f; - char *name = NULL; - char *filename; + case 'R': + case 'U': + logger(DEBUG_ALWAYS, LOG_ERR, "The %s option is not supported on this platform.", argv[optind - 1]); + return false; +#else - get_config_string(lookup_config(config_tree, "Name"), &name); + case 'R': /* chroot to NETNAME dir */ + do_chroot = true; + break; - if(name && !check_id(name)) { - fprintf(stderr, "Invalid name for myself!\n"); - return false; - } + case 'U': /* setuid to USER */ + switchuser = optarg; + break; +#endif - fprintf(stderr, "Generating %d bits keys:\n", bits); - rsa_key = RSA_generate_key(bits, 0x10001, indicator, NULL); + case 1: /* show help */ + show_help = true; + break; - if(!rsa_key) { - fprintf(stderr, "Error during key generation!\n"); - return false; - } else - fprintf(stderr, "Done.\n"); + case 2: /* show version */ + show_version = true; + break; - xasprintf(&filename, "%s/rsa_key.priv", confbase); - f = ask_and_open(filename, "private RSA key"); + case 3: /* bypass security */ + bypass_security = true; + break; - if(!f) - return false; + case 4: /* write log entries to a file */ + use_syslog = false; + use_logfile = true; - if(disable_old_keys(f)) - fprintf(stderr, "Warning: old key(s) found and disabled.\n"); - -#ifdef HAVE_FCHMOD - /* Make it unreadable for others. */ - fchmod(fileno(f), 0600); -#endif - - fputc('\n', f); - PEM_write_RSAPrivateKey(f, rsa_key, NULL, NULL, 0, NULL, NULL); - fclose(f); - free(filename); + if(!optarg && optind < argc && *argv[optind] != '-') { + optarg = argv[optind++]; + } - if(name) - xasprintf(&filename, "%s/hosts/%s", confbase, name); - else - xasprintf(&filename, "%s/rsa_key.pub", confbase); + if(optarg) { + logfilename = xstrdup(optarg); + } - f = ask_and_open(filename, "public RSA key"); + break; - if(!f) - return false; + case 5: /* open control socket here */ + pidfilename = xstrdup(optarg); + break; - if(disable_old_keys(f)) - fprintf(stderr, "Warning: old key(s) found and disabled.\n"); + case '?': /* wrong options */ + usage(true); + return false; - fputc('\n', f); - PEM_write_RSAPublicKey(f, rsa_key); - fclose(f); - free(filename); - if(name) - free(name); + default: + break; + } + } - return true; -} + if(optind < argc) { + fprintf(stderr, "%s: unrecognized argument '%s'\n", argv[0], argv[optind]); + usage(true); + return false; + } -/* - Set all files and paths according to netname -*/ -static void make_names(void) { -#ifdef HAVE_MINGW - HKEY key; - char installdir[1024] = ""; - long len = sizeof(installdir); -#endif + if(!netname && (netname = getenv("NETNAME"))) { + netname = xstrdup(netname); + } - if(netname) - xasprintf(&identname, "tinc.%s", netname); - else - identname = xstrdup("tinc"); + /* netname "." is special: a "top-level name" */ -#ifdef HAVE_MINGW - if(!RegOpenKeyEx(HKEY_LOCAL_MACHINE, "SOFTWARE\\tinc", 0, KEY_READ, &key)) { - if(!RegQueryValueEx(key, NULL, 0, 0, installdir, &len)) { - if(!logfilename) - xasprintf(&logfilename, "%s/log/%s.log", identname); - if(!confbase) { - if(netname) - xasprintf(&confbase, "%s/%s", installdir, netname); - else - xasprintf(&confbase, "%s", installdir); - } - } - RegCloseKey(key); - if(*installdir) - return; + if(netname && (!*netname || !strcmp(netname, "."))) { + free(netname); + netname = NULL; } -#endif - - if(!pidfilename) - xasprintf(&pidfilename, LOCALSTATEDIR "/run/%s.pid", identname); - if(!logfilename) - xasprintf(&logfilename, LOCALSTATEDIR "/log/%s.log", identname); + if(netname && !check_netname(netname, false)) { + fprintf(stderr, "Invalid character in netname!\n"); + return false; + } - if(netname) { - if(!confbase) - xasprintf(&confbase, CONFDIR "/tinc/%s", netname); - else - logger(LOG_INFO, "Both netname and configuration directory given, using the latter..."); - } else { - if(!confbase) - xasprintf(&confbase, CONFDIR "/tinc"); + if(netname && !check_netname(netname, true)) { + fprintf(stderr, "Warning: unsafe character in netname!\n"); } -} -static void free_names() { - if (identname) free(identname); - if (netname) free(netname); - if (pidfilename) free(pidfilename); - if (logfilename) free(logfilename); - if (confbase) free(confbase); + return true; } -static bool drop_privs() { -#ifdef HAVE_MINGW - if (switchuser) { - logger(LOG_ERR, "%s not supported on this platform", "-U"); - return false; - } - if (do_chroot) { - logger(LOG_ERR, "%s not supported on this platform", "-R"); - return false; - } -#else +static bool drop_privs(void) { +#ifndef HAVE_MINGW uid_t uid = 0; - if (switchuser) { + + if(switchuser) { struct passwd *pw = getpwnam(switchuser); - if (!pw) { - logger(LOG_ERR, "unknown user `%s'", switchuser); + + if(!pw) { + logger(DEBUG_ALWAYS, LOG_ERR, "unknown user `%s'", switchuser); return false; } + uid = pw->pw_uid; - if (initgroups(switchuser, pw->pw_gid) != 0 || - setgid(pw->pw_gid) != 0) { - logger(LOG_ERR, "System call `%s' failed: %s", + + if(initgroups(switchuser, pw->pw_gid) != 0 || + setgid(pw->pw_gid) != 0) { + logger(DEBUG_ALWAYS, LOG_ERR, "System call `%s' failed: %s", "initgroups", strerror(errno)); return false; } + +#ifndef __ANDROID__ +// Not supported in android NDK endgrent(); endpwent(); +#endif } - if (do_chroot) { - tzset(); /* for proper timestamps in logs */ - if (chroot(confbase) != 0 || chdir("/") != 0) { - logger(LOG_ERR, "System call `%s' failed: %s", + + if(do_chroot) { + tzset(); /* for proper timestamps in logs */ + + if(chroot(confbase) != 0 || chdir("/") != 0) { + logger(DEBUG_ALWAYS, LOG_ERR, "System call `%s' failed: %s", "chroot", strerror(errno)); return false; } + free(confbase); confbase = xstrdup(""); } - if (switchuser) - if (setuid(uid) != 0) { - logger(LOG_ERR, "System call `%s' failed: %s", + + if(switchuser) + if(setuid(uid) != 0) { + logger(DEBUG_ALWAYS, LOG_ERR, "System call `%s' failed: %s", "setuid", strerror(errno)); return false; } + #endif return true; } #ifdef HAVE_MINGW # define setpriority(level) !SetPriorityClass(GetCurrentProcess(), (level)) + +static void stop_handler(void *data, int flags) { + event_exit(); +} + +static BOOL WINAPI console_ctrl_handler(DWORD type) { + logger(DEBUG_ALWAYS, LOG_NOTICE, "Got console shutdown request"); + + if(WSASetEvent(stop_io.event) == FALSE) { + abort(); + } + + return TRUE; +} #else # define NORMAL_PRIORITY_CLASS 0 # define BELOW_NORMAL_PRIORITY_CLASS 10 @@ -515,19 +366,18 @@ static bool drop_privs() { int main(int argc, char **argv) { program_name = argv[0]; - if(!parse_options(argc, argv)) + if(!parse_options(argc, argv)) { return 1; - - make_names(); + } if(show_version) { - printf("%s version %s (built %s %s, protocol %d)\n", PACKAGE, - VERSION, __DATE__, __TIME__, PROT_CURRENT); - printf("Copyright (C) 1998-2011 Ivo Timmermans, Guus Sliepen and others.\n" - "See the AUTHORS file for a complete list.\n\n" - "tinc comes with ABSOLUTELY NO WARRANTY. This is free software,\n" - "and you are welcome to redistribute it under certain conditions;\n" - "see the file COPYING for details.\n"); + printf("%s version %s (built %s %s, protocol %d.%d)\n", PACKAGE, + BUILD_VERSION, BUILD_DATE, BUILD_TIME, PROT_MAJOR, PROT_MINOR); + printf("Copyright (C) 1998-2018 Ivo Timmermans, Guus Sliepen and others.\n" + "See the AUTHORS file for a complete list.\n\n" + "tinc comes with ABSOLUTELY NO WARRANTY. This is free software,\n" + "and you are welcome to redistribute it under certain conditions;\n" + "see the file COPYING for details.\n"); return 0; } @@ -537,140 +387,182 @@ int main(int argc, char **argv) { return 0; } - if(kill_tincd) - return !kill_other(kill_tincd); + make_names(true); + chdir(confbase); - openlogger("tinc", use_logfile?LOGMODE_FILE:LOGMODE_STDERR); +#ifdef HAVE_MINGW - g_argv = argv; + if(WSAStartup(MAKEWORD(2, 2), &wsa_state)) { + logger(DEBUG_ALWAYS, LOG_ERR, "System call `%s' failed: %s", "WSAStartup", winerror(GetLastError())); + return 1; + } - init_configuration(&config_tree); +#else + // Check if we got an umbilical fd from the process that started us + char *umbstr = getenv("TINC_UMBILICAL"); - /* Slllluuuuuuurrrrp! */ + if(umbstr) { + umbilical = atoi(umbstr); + + if(fcntl(umbilical, F_GETFL) < 0) { + umbilical = 0; + } - RAND_load_file("/dev/urandom", 1024); +#ifdef FD_CLOEXEC - ENGINE_load_builtin_engines(); - ENGINE_register_all_complete(); + if(umbilical) { + fcntl(umbilical, F_SETFD, FD_CLOEXEC); + } + +#endif + } + +#endif - OpenSSL_add_all_algorithms(); + openlogger("tinc", use_logfile ? LOGMODE_FILE : LOGMODE_STDERR); - if(generate_keys) { - read_server_config(); - return !keygen(generate_keys); + g_argv = argv; + + if(getenv("LISTEN_PID") && atoi(getenv("LISTEN_PID")) == getpid()) { + do_detach = false; } - if(!read_server_config()) +#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(LOG_ERR, "Error initializing LZO compressor!"); + logger(DEBUG_ALWAYS, LOG_ERR, "Error initializing LZO compressor!"); return 1; } + #endif #ifdef HAVE_MINGW - if(WSAStartup(MAKEWORD(2, 2), &wsa_state)) { - logger(LOG_ERR, "System call `%s' failed: %s", "WSAStartup", winerror(GetLastError())); - return 1; + io_add_event(&stop_io, stop_handler, NULL, WSACreateEvent()); + + if(stop_io.event == FALSE) { + abort(); } - if(!do_detach || !init_service()) - return main2(argc, argv); - else - return 1; + 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) { - InitializeCriticalSection(&mutex); - EnterCriticalSection(&mutex); #endif + char *priority = NULL; - if(!detach()) + 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(LOG_ERR, "System call `%s' failed: %s", "mlockall", - strerror(errno)); + logger(DEBUG_ALWAYS, LOG_ERR, "System call `%s' failed: %s", "mlockall", + strerror(errno)); return 1; } + #endif /* Setup sockets and open device. */ - if(!setup_network()) + if(!setup_network()) { goto end; - - /* Initiate all outgoing connections. */ - - try_outgoing_connections(); + } /* Change process priority */ - char *priority = NULL; - - if(get_config_string(lookup_config(config_tree, "ProcessPriority"), &priority)) { - if(!strcasecmp(priority, "Normal")) { - if (setpriority(NORMAL_PRIORITY_CLASS) != 0) { - logger(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(LOG_ERR, "System call `%s' failed: %s", - "setpriority", strerror(errno)); - goto end; - } - } else if(!strcasecmp(priority, "High")) { - if (setpriority(HIGH_PRIORITY_CLASS) != 0) { - logger(LOG_ERR, "System call `%s' failed: %s", - "setpriority", strerror(errno)); - goto end; - } - } else { - logger(LOG_ERR, "Invalid priority `%s`!", priority); - goto end; - } - } + 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()) + if(!drop_privs()) { goto end; + } /* Start main loop. It only exits when tinc is killed. */ - status = main_loop(); + logger(DEBUG_ALWAYS, LOG_NOTICE, "Ready"); - /* Shutdown properly. */ + if(umbilical) { // snip! + write(umbilical, "", 1); + close(umbilical); + umbilical = 0; + } - ifdebug(CONNECTIONS) - dump_device_stats(); + try_outgoing_connections(); - close_network_connections(); + status = main_loop(); + + /* Shutdown properly. */ end: - logger(LOG_NOTICE, "Terminating"); + close_network_connections(); -#ifndef HAVE_MINGW - remove_pid(pidfilename); -#endif + logger(DEBUG_ALWAYS, LOG_NOTICE, "Terminating"); free(priority); - EVP_cleanup(); - ENGINE_cleanup(); - CRYPTO_cleanup_all_ex_data(); - ERR_remove_state(0); - ERR_free_strings(); + crypto_exit(); exit_configuration(&config_tree); - list_free(cmdline_conf); + free(cmdline_conf); free_names(); return status;