X-Git-Url: https://tinc-vpn.org/git/browse?p=tinc;a=blobdiff_plain;f=src%2Ftincd.c;h=dc9bf4696eddbb4fe0f1e2f3ca7e5c55955b5899;hp=7e28bcb2b81c1a442129450d6f5596be5558dedb;hb=8c3105283ac53f8cc9cc4dde25957ec1cf6b53a0;hpb=9e02a3d5631b687833e4cdcde18cda66e38138fc diff --git a/src/tincd.c b/src/tincd.c index 7e28bcb2..dc9bf469 100644 --- a/src/tincd.c +++ b/src/tincd.c @@ -1,7 +1,9 @@ /* tincd.c -- the main file for tincd - Copyright (C) 1998-2002 Ivo Timmermans - 2000-2002 Guus Sliepen + Copyright (C) 1998-2005 Ivo Timmermans + 2000-2010 Guus Sliepen + 2008 Max Rijevski + 2009 Michael Tokarev 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 @@ -13,65 +15,59 @@ MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for more details. - You should have received a copy of the GNU General Public License - along with this program; if not, write to the Free Software - Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA. - - $Id: tincd.c,v 1.10.4.68 2003/06/11 19:07:56 guus Exp $ + You should have received a copy of the GNU General Public License along + with this program; if not, write to the Free Software Foundation, Inc., + 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA. */ -#include "config.h" - -#include -#include -#include -#include -#include -#include -#include -#include -#include -#include -#include +#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 - -#ifdef HAVE_SYS_IOCTL_H -# include #endif #include #include #include #include +#include -#include +#ifdef HAVE_LZO +#include LZO1X_H +#endif + +#ifndef HAVE_MINGW +#include +#include +#include +#endif -#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 = NULL; /* If nonzero, display usage information and exit. */ -int show_help = 0; +bool show_help = false; /* If nonzero, print the version on standard output and exit. */ -int show_version = 0; +bool show_version = false; /* If nonzero, it will attempt to kill a running tincd and exit. */ int kill_tincd = 0; @@ -80,84 +76,114 @@ int kill_tincd = 0; int generate_keys = 0; /* If nonzero, use null ciphers and skip all key exchanges. */ -int bypass_security = 0; +bool bypass_security = false; /* If nonzero, disable swapping for this process. */ -int do_mlock = 0; +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 */ -char **environment; /* A pointer to the environment on - startup */ + +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, &show_help, 1}, - {"version", no_argument, &show_version, 1}, - {"no-detach", no_argument, &do_detach, 0}, + {"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, &bypass_security, 1}, - {"mlock", no_argument, &do_mlock, 1}, + {"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"), +#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); else { - printf(_("Usage: %s [option]...\n\n"), program_name); - printf(_(" -c, --config=DIR Read configuration options from DIR.\n" + 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(_("Report bugs to tinc@nl.linux.org.\n")); + " --version Output version information and exit.\n\n"); + printf("Report bugs to tinc@tinc-vpn.org.\n"); } - - exit(status); } -void parse_options(int argc, char **argv, char **envp) -{ +static bool parse_options(int argc, char **argv) { + config_t *cfg; int r; int option_index = 0; + int lineno = 0; - while((r = getopt_long(argc, argv, "c:DLd::k::n:K::", long_options, &option_index)) != EOF) { + 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; case 'c': /* config file */ - confbase = xmalloc(strlen(optarg) + 1); - strcpy(confbase, optarg); + confbase = xstrdup(optarg); break; case 'D': /* no detach */ - do_detach = 0; + do_detach = false; break; case 'L': /* no detach */ - do_mlock = 1; +#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_lvl = atoi(optarg); + debug_level = atoi(optarg); else - debug_lvl++; + debug_level++; break; case 'k': /* kill old tincds */ +#ifndef HAVE_MINGW if(optarg) { if(!strcasecmp(optarg, "HUP")) kill_tincd = SIGHUP; @@ -179,18 +205,28 @@ void parse_options(int argc, char **argv, char **envp) 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"), + 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(1); + usage(true); + return false; } } } else kill_tincd = SIGTERM; +#else + kill_tincd = 1; +#endif break; case 'n': /* net name given */ - netname = xmalloc(strlen(optarg) + 1); - strcpy(netname, optarg); + netname = xstrdup(optarg); + 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 */ @@ -198,29 +234,62 @@ void parse_options(int argc, char **argv, char **envp) 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"), + fprintf(stderr, "Invalid argument `%s'; BITS must be a number equal to or greater than 512.\n", optarg); - usage(1); + usage(true); + return false; } generate_keys &= ~7; /* Round it to bytes */ } else - generate_keys = 1024; + 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(1); + usage(true); + return false; default: break; } } + + return true; } /* This function prettyprints the key generation process */ -void indicator(int a, int b, void *p) -{ +static void indicator(int a, int b, void *p) { switch (a) { case 0: fprintf(stderr, "."); @@ -258,134 +327,212 @@ void indicator(int a, int b, void *p) Generate a public/private RSA keypair, and ask for a file to store them in. */ -int keygen(int bits) -{ +static bool keygen(int bits) { RSA *rsa_key; FILE *f; char *name = NULL; char *filename; - 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!\n")); - return -1; - } else - fprintf(stderr, _("Done.\n")); - get_config_string(lookup_config(config_tree, "Name"), &name); - if(name) - asprintf(&filename, "%s/hosts/%s", confbase, name); - else - asprintf(&filename, "%s/rsa_key.pub", confbase); + if(name && !check_id(name)) { + fprintf(stderr, "Invalid name for myself!\n"); + return false; + } - f = ask_and_safe_open(filename, _("public RSA key"), "a"); + fprintf(stderr, "Generating %d bits keys:\n", bits); + rsa_key = RSA_generate_key(bits, 0x10001, indicator, NULL); - if(!f) - return -1; + if(!rsa_key) { + fprintf(stderr, "Error during key generation!\n"); + return false; + } else + fprintf(stderr, "Done.\n"); - if(ftell(f)) - fprintf(stderr, _("Appending key to existing contents.\nMake sure only one key is stored in the file.\n")); + xasprintf(&filename, "%s/rsa_key.priv", confbase); + f = ask_and_open(filename, "private RSA key"); - PEM_write_RSAPublicKey(f, rsa_key); + if(!f) + return false; + + 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 + + PEM_write_RSAPrivateKey(f, rsa_key, NULL, NULL, 0, NULL, NULL); fclose(f); free(filename); - asprintf(&filename, "%s/rsa_key.priv", confbase); - f = ask_and_safe_open(filename, _("private RSA key"), "a"); + if(name) + xasprintf(&filename, "%s/hosts/%s", confbase, name); + else + xasprintf(&filename, "%s/rsa_key.pub", confbase); + + f = ask_and_open(filename, "public RSA key"); if(!f) - return -1; + return false; - if(ftell(f)) - fprintf(stderr, _("Appending key to existing contents.\nMake sure only one key is stored in the file.\n")); + if(disable_old_keys(f)) + fprintf(stderr, "Warning: old key(s) found and disabled.\n"); - PEM_write_RSAPrivateKey(f, rsa_key, NULL, NULL, 0, NULL, NULL); + PEM_write_RSAPublicKey(f, rsa_key); fclose(f); free(filename); + if(name) + free(name); - return 0; + return true; } /* Set all files and paths according to netname */ -void make_names(void) -{ - if(netname) { - if(!pidfilename) - asprintf(&pidfilename, LOCALSTATEDIR "/run/tinc.%s.pid", netname); +static void make_names(void) { +#ifdef HAVE_MINGW + HKEY key; + char installdir[1024] = ""; + long len = sizeof(installdir); +#endif + + 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 + if(!pidfilename) + xasprintf(&pidfilename, LOCALSTATEDIR "/run/%s.pid", identname); + + if(!logfilename) + xasprintf(&logfilename, LOCALSTATEDIR "/log/%s.log", identname); + + if(netname) { if(!confbase) - asprintf(&confbase, "%s/tinc/%s", CONFDIR, netname); + xasprintf(&confbase, CONFDIR "/tinc/%s", netname); else - syslog(LOG_INFO, _("Both netname and configuration directory given, using the latter...")); - - if(!identname) - asprintf(&identname, "tinc.%s", netname); + logger(LOG_INFO, "Both netname and configuration directory given, using the latter..."); } else { - if(!pidfilename) - pidfilename = LOCALSTATEDIR "/run/tinc.pid"; - if(!confbase) - asprintf(&confbase, "%s/tinc", CONFDIR); + xasprintf(&confbase, CONFDIR "/tinc"); + } +} + +static void free_names() { + if (identname) free(identname); + if (netname) free(netname); + if (pidfilename) free(pidfilename); + if (logfilename) free(logfilename); + if (confbase) free(confbase); +} - 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) -{ - program_name = argv[0]; +#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 - setlocale(LC_ALL, ""); - bindtextdomain(PACKAGE, LOCALEDIR); - textdomain(PACKAGE); +int main(int argc, char **argv) { + program_name = argv[0]; - environment = envp; - parse_options(argc, argv, envp); + if(!parse_options(argc, argv)) + return 1; + make_names(); if(show_version) { - printf(_("%s version %s (built %s %s, protocol %d)\n"), PACKAGE, + printf("%s version %s (built %s %s, protocol %d)\n", PACKAGE, VERSION, __DATE__, __TIME__, PROT_CURRENT); - printf(_("Copyright (C) 1998-2002 Ivo Timmermans, Guus Sliepen and others.\n" + printf("Copyright (C) 1998-2010 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")); + "see the file COPYING for details.\n"); return 0; } - if(show_help) - usage(0); + if(show_help) { + usage(false); + return 0; + } if(kill_tincd) - exit(kill_other(kill_tincd)); - -#ifndef LOG_PERROR - openlog("tinc", LOG_CONS, LOG_DAEMON); /* Catch all syslog() calls issued before detaching */ -#else - openlog("tinc", LOG_PERROR, LOG_DAEMON); /* Catch all syslog() calls issued before detaching */ -#endif + return !kill_other(kill_tincd); - /* Lock all pages into memory if requested */ - - if(do_mlock) -#ifdef HAVE_MLOCKALL - if(mlockall(MCL_CURRENT | MCL_FUTURE)) { - syslog(LOG_ERR, _("System call `%s' failed: %s"), "mlockall", - strerror(errno)); -#else - { - syslog(LOG_ERR, _("mlockall() not supported on this platform!")); -#endif - return -1; - } + openlogger("tinc", use_logfile?LOGMODE_FILE:LOGMODE_STDERR); g_argv = argv; @@ -395,51 +542,125 @@ int main(int argc, char **argv, char **envp) RAND_load_file("/dev/urandom", 1024); -#ifdef HAVE_OPENSSL_ADD_ALL_ALGORITHMS_NOCONF - OPENSSL_add_all_algorithms_noconf(); -#else -#ifdef HAVE_OPENSSL_ADD_ALL_ALGORITHMS + ENGINE_load_builtin_engines(); + ENGINE_register_all_complete(); + OpenSSL_add_all_algorithms(); -#else -#ifdef HAVE_SSLEAY_ADD_ALL_ALGORITHMS - SSLeay_add_all_algorithms(); -#else -#error No add_all_algorithms function available! -#endif -#endif -#endif if(generate_keys) { read_server_config(); - exit(keygen(generate_keys)); + return !keygen(generate_keys); } - if(read_server_config()) - exit(1); + if(!read_server_config()) + return 1; +#ifdef HAVE_LZO if(lzo_init() != LZO_E_OK) { - syslog(LOG_ERR, _("Error initializing LZO compressor!")); - exit(1); + logger(LOG_ERR, "Error initializing LZO compressor!"); + return 1; } +#endif - if(detach()) - exit(0); - - for(;;) { - if(!setup_network_connections()) { - main_loop(); - cleanup_and_exit(1); - } +#ifdef HAVE_MINGW + if(WSAStartup(MAKEWORD(2, 2), &wsa_state)) { + logger(LOG_ERR, "System call `%s' failed: %s", "WSAStartup", winerror(GetLastError())); + return 1; + } + + if(!do_detach || !init_service()) + return main2(argc, argv); + else + return 1; +} - syslog(LOG_ERR, _("Unrecoverable error")); - cp_trace(); +int main2(int argc, char **argv) { + InitializeCriticalSection(&mutex); + EnterCriticalSection(&mutex); +#endif - if(do_detach) { - syslog(LOG_NOTICE, _("Restarting in %d seconds!"), maxtimeout); - sleep(maxtimeout); - } else { - syslog(LOG_ERR, _("Not restarting.")); - exit(1); - } + 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 + + /* Setup sockets and open device. */ + + if(!setup_network()) + goto end; + + /* Initiate all outgoing connections. */ + + try_outgoing_connections(); + + /* Change process priority */ + + char *priority = 0; + + 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; + } + } + + /* drop privileges */ + if (!drop_privs()) + goto end; + + /* Start main loop. It only exits when tinc is killed. */ + + status = main_loop(); + + /* Shutdown properly. */ + + ifdebug(CONNECTIONS) + dump_device_stats(); + + 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; }