X-Git-Url: https://www.tinc-vpn.org/git/browse?p=tinc;a=blobdiff_plain;f=src%2Ftincd.c;h=a13e2661046f58d2ca64df3a423e1e0a1e492f17;hp=eea15dbddf5d44ffd39e29e91bd2980b63c832ca;hb=73d77dd416b87b7c4e9b6aa450f64846235cd2b4;hpb=74326df7adc514798565df0a8719421adbb5fef3 diff --git a/src/tincd.c b/src/tincd.c index eea15dbd..a13e2661 100644 --- a/src/tincd.c +++ b/src/tincd.c @@ -1,7 +1,7 @@ /* tincd.c -- the main file for tincd - Copyright (C) 1998,1999,2000 Ivo Timmermans - 2000 Guus Sliepen + Copyright (C) 1998-2005 Ivo Timmermans + 2000-2009 Guus Sliepen This program is free software; you can redistribute it and/or modify it under the terms of the GNU General Public License as published by @@ -17,567 +17,629 @@ along with this program; if not, write to the Free Software Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA. - $Id: tincd.c,v 1.10.4.26 2000/11/08 00:20:06 guus Exp $ + $Id$ */ -#include "config.h" +#include "system.h" + +/* Darwin (MacOS/X) needs the following definition... */ +#ifndef _P1003_1B_VISIBLE +#define _P1003_1B_VISIBLE +#endif + +#ifdef HAVE_SYS_MMAN_H +#include +#endif -#include -#include -#include -#include -#include -#include -#include -#include -#include #include #include -#include -#include -#include +#include +#include +#include + +#include LZO1X_H -#ifdef HAVE_SYS_IOCTL_H -# include +#ifndef HAVE_MINGW +#include +#include +#include #endif -#include -#include -#include +#include +#include "pidfile.h" #include "conf.h" +#include "device.h" +#include "logger.h" #include "net.h" #include "netutl.h" +#include "process.h" #include "protocol.h" -#include "subnet.h" - -#include "system.h" +#include "utils.h" +#include "xalloc.h" /* The name this program was run with. */ -char *program_name; +char *program_name = NULL; /* If nonzero, display usage information and exit. */ -static int show_help; +bool show_help = false; /* If nonzero, print the version on standard output and exit. */ -static int show_version; +bool show_version = false; /* If nonzero, it will attempt to kill a running tincd and exit. */ -static int kill_tincd = 0; - -/* If zero, don't detach from the terminal. */ -static int do_detach = 1; +int kill_tincd = 0; /* If nonzero, generate public/private keypair for this host/net. */ -static int generate_keys = 0; - -char *identname; /* program name for syslog */ -char *pidfilename; /* pid file location */ -static pid_t ppid; /* pid of non-detached part */ -char **g_argv; /* a copy of the cmdline arguments */ -char **environment; /* A pointer to the environment on - startup */ - -void cleanup_and_exit(int); -int detach(void); -int kill_other(void); -void make_names(void); -RETSIGTYPE parent_exit(int a); -void setup_signals(void); -int write_pidfile(void); - -static struct option const long_options[] = -{ - { "config", required_argument, NULL, 'c' }, - { "kill", no_argument, NULL, 'k' }, - { "net", required_argument, NULL, 'n' }, - { "help", no_argument, &show_help, 1 }, - { "version", no_argument, &show_version, 1 }, - { "no-detach", no_argument, &do_detach, 0 }, - { "generate-keys", optional_argument, NULL, 'K'}, - { NULL, 0, NULL, 0 } +int generate_keys = 0; + +/* If nonzero, use null ciphers and skip all key exchanges. */ +bool bypass_security = false; + +/* If nonzero, disable swapping for this process. */ +bool do_mlock = false; + +/* 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; + +/* 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 */ + +static int status; + +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}, + {"pidfile", required_argument, NULL, 5}, + {NULL, 0, NULL, 0} }; -static void -usage(int status) -{ - if(status != 0) - fprintf(stderr, _("Try `%s --help\' for more information.\n"), 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 Increase debug level.\n" - " -k, --kill Attempt to kill a running tincd and exit.\n" - " -n, --net=NETNAME Connect to net NETNAME.\n")); - printf(_(" -K, --generate-keys[=BITS] Generate public/private RSA keypair.\n" - " --help Display this help and exit.\n" - " --version Output version information and exit.\n\n")); - printf(_("Report bugs to tinc@nl.linux.org.\n")); - } - exit(status); -} +#ifdef HAVE_MINGW +static struct WSAData wsa_state; +#endif -void -parse_options(int argc, char **argv, char **envp) +static void usage(bool status) { - int r; - int option_index = 0; - - while((r = getopt_long(argc, argv, "c:Ddkn:K::", long_options, &option_index)) != EOF) - { - switch(r) - { - case 0: /* long option */ - break; - case 'c': /* config file */ - confbase = xmalloc(strlen(optarg)+1); - strcpy(confbase, optarg); - break; - case 'D': /* no detach */ - do_detach = 0; - break; - case 'd': /* inc debug level */ - debug_lvl++; - break; - case 'k': /* kill old tincds */ - kill_tincd = 1; - break; - case 'n': /* net name given */ - netname = xmalloc(strlen(optarg)+1); - strcpy(netname, optarg); - break; - case 'K': /* generate public/private keypair */ - if(optarg) - { - generate_keys = atoi(optarg); - if(generate_keys < 512) - { - fprintf(stderr, _("Invalid argument! BITS must be a number equal to or greater than 512.\n")); - usage(1); - } - generate_keys &= ~7; /* Round it to bytes */ - } - else - generate_keys = 1024; - break; - case '?': - usage(1); - default: - break; - } - } + if(status) + fprintf(stderr, _("Try `%s --help\' for more information.\n"), + 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" + " -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(_("Report bugs to tinc@tinc-vpn.org.\n")); + } } -/* This function prettyprints the key generation process */ - -void indicator(int a, int b, void *p) +static bool parse_options(int argc, char **argv) { - switch(a) - { - case 0: - fprintf(stderr, "."); - break; - case 1: - fprintf(stderr, "+"); - break; - case 2: - fprintf(stderr, "-"); - break; - case 3: - switch(b) - { - case 0: - fprintf(stderr, " p\n"); - break; - case 1: - fprintf(stderr, " q\n"); - break; - default: - fprintf(stderr, "?"); - } - break; - default: - fprintf(stderr, "?"); - } -} + int r; + int option_index = 0; + + while((r = getopt_long(argc, argv, "c:DLd::k::n:K::RU:", long_options, &option_index)) != EOF) { + switch (r) { + case 0: /* long option */ + break; + + case 'c': /* config file */ + confbase = xstrdup(optarg); + break; + + case 'D': /* no detach */ + do_detach = false; + break; + + 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 -/* Generate a public/private RSA keypair, and possibly store it into the configuration file. */ + 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 { + 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; +#else + kill_tincd = 1; +#endif + break; + + case 'n': /* net name given */ + netname = xstrdup(optarg); + 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 = 1024; + 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; + } + } -int keygen(int bits) -{ - RSA *rsa_key; - - fprintf(stderr, _("Generating %d bits keys:\n"), bits); - rsa_key = RSA_generate_key(bits, 0xFFFF, indicator, NULL); - if(!rsa_key) - { - fprintf(stderr, _("Error during key generation!")); - return -1; - } - else - fprintf(stderr, _("Done.\n")); - - fprintf(stderr, _("Please copy the private key to tinc.conf and the\npublic key to your host configuration file:\n\n")); - printf("PublicKey = %s\n", BN_bn2hex(rsa_key->n)); - printf("PrivateKey = %s\n", BN_bn2hex(rsa_key->d)); - - fflush(stdin); - return 0; + return true; } -void memory_full(int size) +/* This function prettyprints the key generation process */ + +static void indicator(int a, int b, void *p) { - syslog(LOG_ERR, _("Memory exhausted (last is %s:%d) (couldn't allocate %d bytes), exiting."), cp_file, cp_line, size); - exit(1); + switch (a) { + case 0: + fprintf(stderr, "."); + break; + + case 1: + fprintf(stderr, "+"); + break; + + case 2: + fprintf(stderr, "-"); + break; + + case 3: + switch (b) { + case 0: + fprintf(stderr, " p\n"); + break; + + case 1: + fprintf(stderr, " q\n"); + break; + + default: + fprintf(stderr, "?"); + } + break; + + default: + fprintf(stderr, "?"); + } } /* - Detach from current terminal, write pidfile, kill parent + Generate a public/private RSA keypair, and ask for a file to store + them in. */ -int detach(void) +static bool keygen(int bits) { - int fd; - pid_t pid; + RSA *rsa_key; + FILE *f; + char *name = NULL; + char *filename; - if(do_detach) - { - ppid = getpid(); + get_config_string(lookup_config(config_tree, "Name"), &name); - if((pid = fork()) < 0) - { - perror("fork"); - return -1; - } - if(pid) /* parent process */ - { - signal(SIGTERM, parent_exit); - sleep(600); /* wait 10 minutes */ - exit(1); - } - } - - if(write_pidfile()) - return -1; - - if(do_detach) - { - if((fd = open("/dev/tty", O_RDWR)) >= 0) - { - if(ioctl(fd, TIOCNOTTY, NULL)) - { - perror("ioctl"); - return -1; - } - close(fd); + if(name && !check_id(name)) { + fprintf(stderr, _("Invalid name for myself!\n")); + return false; } - if(setsid() < 0) - return -1; + fprintf(stderr, _("Generating %d bits keys:\n"), bits); + rsa_key = RSA_generate_key(bits, 0x10001, indicator, NULL); + + if(!rsa_key) { + fprintf(stderr, _("Error during key generation!\n")); + return false; + } else + fprintf(stderr, _("Done.\n")); - kill(ppid, SIGTERM); - } + xasprintf(&filename, "%s/rsa_key.priv", confbase); + f = ask_and_open(filename, _("private RSA key")); + + if(!f) + return false; + + if(disable_old_keys(f)) + fprintf(stderr, _("Warning: old key(s) found and disabled.\n")); - chdir("/"); /* avoid keeping a mointpoint busy */ +#ifdef HAVE_FCHMOD + /* Make it unreadable for others. */ + fchmod(fileno(f), 0600); +#endif + + PEM_write_RSAPrivateKey(f, rsa_key, NULL, NULL, 0, NULL, NULL); + fclose(f); + free(filename); + + if(name) + xasprintf(&filename, "%s/hosts/%s", confbase, name); + else + xasprintf(&filename, "%s/rsa_key.pub", confbase); - openlog(identname, LOG_CONS | LOG_PID, LOG_DAEMON); + f = ask_and_open(filename, _("public RSA key")); - if(debug_lvl > DEBUG_NOTHING) - syslog(LOG_NOTICE, _("tincd %s (%s %s) starting, debug level %d"), - VERSION, __DATE__, __TIME__, debug_lvl); - else - syslog(LOG_NOTICE, _("tincd %s starting"), VERSION); + if(!f) + return false; - xalloc_fail_func = memory_full; + if(disable_old_keys(f)) + fprintf(stderr, _("Warning: old key(s) found and disabled.\n")); - return 0; + PEM_write_RSAPublicKey(f, rsa_key); + fclose(f); + free(filename); + if(name) + free(name); + + return true; } /* - Close network connections, and terminate neatly + Set all files and paths according to netname */ -void cleanup_and_exit(int c) +static void make_names(void) { - close_network_connections(); +#ifdef HAVE_MINGW + HKEY key; + char installdir[1024] = ""; + long len = sizeof(installdir); +#endif - if(debug_lvl > DEBUG_NOTHING) - syslog(LOG_INFO, _("Total bytes written: tap %d, socket %d; bytes read: tap %d, socket %d"), - total_tap_out, total_socket_out, total_tap_in, total_socket_in); + if(netname) + xasprintf(&identname, "tinc.%s", netname); + else + identname = xstrdup("tinc"); + +#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; + } +#endif - closelog(); - kill(ppid, SIGTERM); - exit(c); -} + if(!pidfilename) + xasprintf(&pidfilename, LOCALSTATEDIR "/run/%s.pid", identname); -/* - check for an existing tinc for this net, and write pid to pidfile -*/ -int write_pidfile(void) -{ - int pid; - - if((pid = check_pid(pidfilename))) - { - if(netname) - fprintf(stderr, _("A tincd is already running for net `%s' with pid %d.\n"), - netname, pid); - else - fprintf(stderr, _("A tincd is already running with pid %d.\n"), pid); - return 1; - } - - /* if it's locked, write-protected, or whatever */ - if(!write_pid(pidfilename)) - return 1; - - return 0; + if(!logfilename) + xasprintf(&logfilename, LOCALSTATEDIR "/log/%s.log", identname); + + 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"); + } } -/* - kill older tincd for this net -*/ -int kill_other(void) -{ - int pid; - - if(!(pid = read_pid(pidfilename))) - { - if(netname) - fprintf(stderr, _("No other tincd is running for net `%s'.\n"), netname); - else - fprintf(stderr, _("No other tincd is running.\n")); - return 1; - } - - errno = 0; /* No error, sometimes errno is only changed on error */ - /* ESRCH is returned when no process with that pid is found */ - if(kill(pid, SIGTERM) && errno == ESRCH) - fprintf(stderr, _("Removing stale lock file.\n")); - remove_pid(pidfilename); - - return 0; +static void free_names() { + if (identname) free(identname); + if (netname) free(netname); + if (pidfilename) free(pidfilename); + if (logfilename) free(logfilename); + if (confbase) free(confbase); } -/* - Set all files and paths according to netname -*/ -void make_names(void) -{ - if(netname) - { - if(!pidfilename) - asprintf(&pidfilename, "/var/run/tinc.%s.pid", netname); - if(!confbase) - asprintf(&confbase, "%s/tinc/%s", CONFDIR, netname); - else - fprintf(stderr, "Both netname and configuration directory given, using the latter...\n"); - if(!identname) - asprintf(&identname, "tinc.%s", netname); - } - else - { - if(!pidfilename) - pidfilename = "/var/run/tinc.pid"; - if(!confbase) - asprintf(&confbase, "%s/tinc", CONFDIR); - if(!identname) - identname = "tinc"; - } +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 + uid_t uid = 0; + if (switchuser) { + struct passwd *pw = getpwnam(switchuser); + if (!pw) { + logger(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"), + "initgroups", strerror(errno)); + return false; + } + endgrent(); + endpwent(); + } + if (do_chroot) { + tzset(); /* for proper timestamps in logs */ + if (chroot(confbase) != 0 || chdir("/") != 0) { + logger(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"), + "setuid", strerror(errno)); + return false; + } +#endif + return true; } -int -main(int argc, char **argv, char **envp) +#ifdef HAVE_MINGW +# define setpriority(level) SetPriorityClass(GetCurrentProcess(), level) +#else +# define NORMAL_PRIORITY_CLASS 0 +# define BELOW_NORMAL_PRIORITY_CLASS 10 +# define HIGH_PRIORITY_CLASS -10 +# define setpriority(level) nice(level) +#endif + +int main(int argc, char **argv) { - program_name = argv[0]; + program_name = argv[0]; + + setlocale(LC_ALL, ""); + bindtextdomain(PACKAGE, LOCALEDIR); + textdomain(PACKAGE); + + 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) 1998-2009 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; + } - setlocale (LC_ALL, ""); - bindtextdomain (PACKAGE, LOCALEDIR); - textdomain (PACKAGE); + if(show_help) { + usage(false); + return 0; + } - /* Do some intl stuff right now */ - - unknown = _("unknown"); + if(kill_tincd) + return !kill_other(kill_tincd); - environment = envp; - parse_options(argc, argv, envp); + openlogger("tinc", use_logfile?LOGMODE_FILE:LOGMODE_STDERR); - if(show_version) - { - printf(_("%s version %s (built %s %s, protocol %d)\n"), PACKAGE, VERSION, __DATE__, __TIME__, PROT_CURRENT); - printf(_("Copyright (C) 1998,1999,2000 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")); + g_argv = argv; - return 0; - } + init_configuration(&config_tree); - if(show_help) - usage(0); + /* Slllluuuuuuurrrrp! */ - if(geteuid()) - { - fprintf(stderr, _("You must be root to run this program. Sorry.\n")); - return 1; - } + RAND_load_file("/dev/urandom", 1024); - g_argv = argv; + ENGINE_load_builtin_engines(); + ENGINE_register_all_complete(); - make_names(); + OpenSSL_add_all_algorithms(); - /* Slllluuuuuuurrrrp! */ + if(generate_keys) { + read_server_config(); + return !keygen(generate_keys); + } - RAND_load_file("/dev/urandom", 1024); + if(!read_server_config()) + return 1; - if(generate_keys) - exit(keygen(generate_keys)); + if(lzo_init() != LZO_E_OK) { + logger(LOG_ERR, _("Error initializing LZO compressor!")); + return 1; + } - if(kill_tincd) - exit(kill_other()); +#ifdef HAVE_MINGW + if(WSAStartup(MAKEWORD(2, 2), &wsa_state)) { + logger(LOG_ERR, _("System call `%s' failed: %s"), "WSAStartup", winerror(GetLastError())); + return 1; + } - if(read_server_config()) - return 1; + if(!do_detach || !init_service()) + return main2(argc, argv); + else + return 1; +} - setup_signals(); +int main2(int argc, char **argv) +{ +#endif - if(detach()) - exit(0); + 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)); + return 1; + } +#endif - if(debug_lvl >= DEBUG_ERROR) - ERR_load_crypto_strings(); - - for(;;) - { - if(!setup_network_connections()) - { - main_loop(); - cleanup_and_exit(1); - } - - syslog(LOG_ERR, _("Unrecoverable error")); - cp_trace(); - - if(do_detach) - { - syslog(LOG_NOTICE, _("Restarting in %d seconds!"), MAXTIMEOUT); - sleep(MAXTIMEOUT); - } - else - { - syslog(LOG_ERR, _("Not restarting.")); - exit(0); - } - } -} + /* Setup sockets and open device. */ -RETSIGTYPE -sigterm_handler(int a) -{ - if(debug_lvl > DEBUG_NOTHING) - syslog(LOG_NOTICE, _("Got TERM signal")); + if(!setup_network()) + goto end; - cleanup_and_exit(0); -} + /* Initiate all outgoing connections. */ -RETSIGTYPE -sigquit_handler(int a) -{ - if(debug_lvl > DEBUG_NOTHING) - syslog(LOG_NOTICE, _("Got QUIT signal")); - cleanup_and_exit(0); -} + try_outgoing_connections(); -RETSIGTYPE -sigsegv_square(int a) -{ - syslog(LOG_ERR, _("Got another SEGV signal: not restarting")); - exit(0); -} + /* Change process priority */ -RETSIGTYPE -sigsegv_handler(int a) -{ - syslog(LOG_ERR, _("Got SEGV signal")); - cp_trace(); - - if(do_detach) - { - syslog(LOG_NOTICE, _("Trying to re-execute in 5 seconds...")); - signal(SIGSEGV, sigsegv_square); - close_network_connections(); - sleep(5); - remove_pid(pidfilename); - execvp(g_argv[0], g_argv); - } - else - { - syslog(LOG_NOTICE, _("Not restarting.")); - exit(0); - } -} + char *priority = 0; -RETSIGTYPE -sighup_handler(int a) -{ - if(debug_lvl > DEBUG_NOTHING) - syslog(LOG_NOTICE, _("Got HUP signal")); - sighup = 1; -} + if(get_config_string(lookup_config(config_tree, "ProcessPriority"), &priority)) { + if(!strcasecmp(priority, "Normal")) + setpriority(NORMAL_PRIORITY_CLASS); + else if(!strcasecmp(priority, "Low")) + setpriority(BELOW_NORMAL_PRIORITY_CLASS); + else if(!strcasecmp(priority, "High")) + setpriority(HIGH_PRIORITY_CLASS); + else { + logger(LOG_ERR, _("Invalid priority `%s`!"), priority); + goto end; + } + } -RETSIGTYPE -sigint_handler(int a) -{ - if(debug_lvl > DEBUG_NOTHING) - syslog(LOG_NOTICE, _("Got INT signal, exiting")); - cleanup_and_exit(0); -} + /* drop privileges */ + if (!drop_privs()) + goto end; -RETSIGTYPE -sigusr1_handler(int a) -{ - dump_conn_list(); -} + /* Start main loop. It only exits when tinc is killed. */ -RETSIGTYPE -sigusr2_handler(int a) -{ - dump_subnet_list(); -} + status = main_loop(); -RETSIGTYPE -sighuh(int a) -{ - syslog(LOG_WARNING, _("Got unexpected signal %d (%s)"), a, strsignal(a)); - cp_trace(); -} + /* Shutdown properly. */ -void -setup_signals(void) -{ - int i; - - for(i=0;i<32;i++) - signal(i,sighuh); - - if(signal(SIGTERM, SIG_IGN) != SIG_ERR) - signal(SIGTERM, sigterm_handler); - if(signal(SIGQUIT, SIG_IGN) != SIG_ERR) - signal(SIGQUIT, sigquit_handler); - if(signal(SIGSEGV, SIG_IGN) != SIG_ERR) - signal(SIGSEGV, sigsegv_handler); - if(signal(SIGHUP, SIG_IGN) != SIG_ERR) - signal(SIGHUP, sighup_handler); - signal(SIGPIPE, SIG_IGN); - if(signal(SIGINT, SIG_IGN) != SIG_ERR) - signal(SIGINT, sigint_handler); - signal(SIGUSR1, sigusr1_handler); - signal(SIGUSR2, sigusr2_handler); - signal(SIGCHLD, SIG_IGN); -} + ifdebug(CONNECTIONS) + dump_device_stats(); -RETSIGTYPE parent_exit(int a) -{ - exit(0); + close_network_connections(); + +end: + logger(LOG_NOTICE, _("Terminating")); + +#ifndef HAVE_MINGW + remove_pid(pidfilename); +#endif + + EVP_cleanup(); + ENGINE_cleanup(); + CRYPTO_cleanup_all_ex_data(); + ERR_remove_state(0); + ERR_free_strings(); + + exit_configuration(&config_tree); + free_names(); + + return status; }