X-Git-Url: https://www.tinc-vpn.org/git/browse?p=tinc;a=blobdiff_plain;f=src%2Ftincd.c;h=6606b5b5963bae0498efc5ecd31174437249d58f;hp=0ae2b7c33c31e1b5913b6ca6d3e05d0a5341c20d;hb=a65011b3c54cd4ddc66f20909ca0e495de0d6eb0;hpb=ea40d3f1a05e9edf4ccfb77f4e9e0f8355e94a83 diff --git a/src/tincd.c b/src/tincd.c index 0ae2b7c3..6606b5b5 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) 1998-2003 Ivo Timmermans + 2000-2003 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 @@ -17,478 +17,466 @@ along with this program; if not, write to the Free Software Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA. - $Id: tincd.c,v 1.10.4.2 2000/06/28 11:38:01 guus Exp $ + $Id: tincd.c,v 1.10.4.82 2003/08/03 09:08:52 guus Exp $ */ -#include "config.h" +#include "system.h" -#include -#include -#include -#include -#include -#include -#include -#include - -#ifdef HAVE_SYS_IOCTL_H -# include +/* Darwin (MacOS/X) needs the following definition... */ +#ifndef _P1003_1B_VISIBLE +#define _P1003_1B_VISIBLE #endif -#include -#include -#include +#ifdef HAVE_SYS_MMAN_H +#include +#endif + +#include +#include +#include +#include + +#include + +#include #include "conf.h" -#include "encr.h" +#include "device.h" +#include "logger.h" #include "net.h" #include "netutl.h" - -#include "system.h" +#include "process.h" +#include "protocol.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; - -char *confbase = NULL; /* directory in which all config files are */ -char *configfilename = NULL; /* configuration file name */ -char *identname; /* program name for syslog */ -char *netname = NULL; /* name of the vpn network */ -char *pidfilename; /* pid file location */ -static pid_t ppid; /* pid of non-detached part */ -char **g_argv; /* a copy of the cmdline arguments */ - -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[] = -{ - { "kill", no_argument, NULL, 'k' }, - { "net", required_argument, NULL, 'n' }, - { "timeout", required_argument, NULL, 'p' }, - { "help", no_argument, &show_help, 1 }, - { "version", no_argument, &show_version, 1 }, - { "no-detach", no_argument, &do_detach, 0 }, - { NULL, 0, NULL, 0 } +int kill_tincd = 0; + +/* If nonzero, generate public/private keypair for this host/net. */ +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, 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 */ + +int exitstatus = 0; + +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'}, + {"logfile", optional_argument, NULL, 4}, + {"pidfile", required_argument, NULL, 5}, + {NULL, 0, NULL, 0} }; -static void -usage(int status) +#ifdef HAVE_MINGW +static struct WSAData wsa_state; +#endif + +static void usage(bool 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=FILE Read configuration options from FILE.\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" - " -t, --timeout=TIMEOUT Seconds to wait before giving a timeout.\n")); - printf(_(" --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); + 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" + " --help Display this help and exit.\n" + " --version Output version information and exit.\n\n")); + printf(_("Report bugs to tinc@nl.linux.org.\n")); + } } -void -parse_options(int argc, char **argv, char **envp) +static bool parse_options(int argc, char **argv) { - int r; - int option_index = 0; - config_t *p; - - while((r = getopt_long(argc, argv, "c:Ddkn:t:", long_options, &option_index)) != EOF) - { - switch(r) - { - case 0: /* long option */ - break; - case 'c': /* config file */ - configfilename = xmalloc(strlen(optarg)+1); - strcpy(configfilename, 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 't': /* timeout */ - if(!(p = add_config_val(&config, TYPE_INT, optarg))) - { - printf(_("Invalid timeout value `%s'.\n"), optarg); - usage(1); - } - break; - case '?': - usage(1); - default: - break; - } - } + int r; + int option_index = 0; + + while((r = getopt_long(argc, argv, "c:DLd::k::n:K::", 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 */ + do_mlock = true; + break; + + 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 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; } -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(); + fprintf(stderr, _("Generating %d bits keys:\n"), bits); + rsa_key = RSA_generate_key(bits, 0xFFFF, indicator, NULL); - 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(!rsa_key) { + fprintf(stderr, _("Error during key generation!\n")); + return false; + } else + fprintf(stderr, _("Done.\n")); - if(setsid() < 0) - return -1; + asprintf(&filename, "%s/rsa_key.priv", confbase); + f = ask_and_safe_open(filename, _("private RSA key"), true, "a"); - kill(ppid, SIGTERM); - } - - chdir("/"); /* avoid keeping a mointpoint busy */ + if(!f) + return false; - openlog(identname, LOG_CONS | LOG_PID, LOG_DAEMON); + if(ftell(f)) + fprintf(stderr, _("Appending key to existing contents.\nMake sure only one key is stored in the file.\n")); - if(debug_lvl > 0) - syslog(LOG_NOTICE, _("tincd %s (%s %s) starting, debug level %d"), - VERSION, __DATE__, __TIME__, debug_lvl); - else - syslog(LOG_NOTICE, _("tincd %s starting"), VERSION, debug_lvl); + PEM_write_RSAPrivateKey(f, rsa_key, NULL, NULL, 0, NULL, NULL); + fclose(f); + free(filename); - xalloc_fail_func = memory_full; + get_config_string(lookup_config(config_tree, "Name"), &name); - return 0; -} + if(name) + asprintf(&filename, "%s/hosts/%s", confbase, name); + else + asprintf(&filename, "%s/rsa_key.pub", confbase); -/* - Close network connections, and terminate neatly -*/ -void cleanup_and_exit(int c) -{ - close_network_connections(); + f = ask_and_safe_open(filename, _("public RSA key"), false, "a"); - if(debug_lvl > 0) - 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(!f) + return false; - closelog(); - kill(ppid, SIGTERM); - exit(c); -} + if(ftell(f)) + fprintf(stderr, _("Appending key to existing contents.\nMake sure only one key is stored in the file.\n")); -/* - 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; -} + PEM_write_RSAPublicKey(f, rsa_key); + fclose(f); + free(filename); -/* - 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; + return true; } /* Set all files and paths according to netname */ -void make_names(void) +static void make_names(void) { - if(!configfilename) - { - if(netname) - { - configfilename = xmalloc(strlen(netname)+18+strlen(CONFDIR)); - sprintf(configfilename, "%s/tinc/%s/tinc.conf", CONFDIR, netname); + if(netname) + asprintf(&identname, "tinc.%s", netname); + else + identname = xstrdup("tinc"); + + if(!pidfilename) + asprintf(&pidfilename, LOCALSTATEDIR "/run/%s.pid", identname); + + if(!logfilename) + asprintf(&logfilename, LOCALSTATEDIR "/log/%s.log", identname); + + if(netname) { + if(!confbase) + asprintf(&confbase, "%s/tinc/%s", CONFDIR, netname); + else + logger(LOG_INFO, _("Both netname and configuration directory given, using the latter...")); + } else { + if(!confbase) + asprintf(&confbase, "%s/tinc", CONFDIR); } - else - { - configfilename = xmalloc(17+strlen(CONFDIR)); - sprintf(configfilename, "%s/tinc/tinc.conf", CONFDIR); - } - } - - if(netname) - { - pidfilename = xmalloc(strlen(netname)+20); - sprintf(pidfilename, "/var/run/tinc.%s.pid", netname); - confbase = xmalloc(strlen(netname)+8+strlen(CONFDIR)); - sprintf(confbase, "%s/tinc/%s/", CONFDIR, netname); - identname = xmalloc(strlen(netname)+7); - sprintf(identname, "tinc.%s", netname); - } - else - { - pidfilename = "/var/run/tinc.pid"; - confbase = xmalloc(7+strlen(CONFDIR)); - sprintf(confbase, "%s/tinc/", CONFDIR); - identname = "tinc"; - } } -int -main(int argc, char **argv, char **envp) +int main(int argc, char **argv) { - program_name = argv[0]; - - setlocale (LC_ALL, ""); - bindtextdomain (PACKAGE, LOCALEDIR); - textdomain (PACKAGE); - - parse_options(argc, argv, envp); - - if(show_version) - { - printf(_("%s version %s\n"), PACKAGE, VERSION); - printf(_("Copyright (C) 1998,1999,2000 Ivo Timmermans 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\n")); - printf(_("This product includes software developed by Eric Young (eay@mincom.oz.au)\n")); - - return 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) 1998-2003 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; + } - if(show_help) - usage(0); + if(show_help) { + usage(false); + return 0; + } - if(geteuid()) - { - fprintf(stderr, _("You must be root to run this program. Sorry.\n")); - return 1; - } + if(kill_tincd) + return !kill_other(kill_tincd); - g_argv = argv; + openlogger("tinc", LOGMODE_STDERR); - make_names(); + /* Lock all pages into memory if requested */ - if(kill_tincd) - exit(kill_other()); + if(do_mlock) +#ifdef HAVE_MLOCKALL + if(mlockall(MCL_CURRENT | MCL_FUTURE)) { + logger(LOG_ERR, _("System call `%s' failed: %s"), "mlockall", + strerror(errno)); +#else + { + logger(LOG_ERR, _("mlockall() not supported on this platform!")); +#endif + return -1; + } - if(read_config_file(configfilename)) - return 1; + g_argv = argv; - setup_signals(); + init_configuration(&config_tree); - if(detach()) - exit(0); + /* Slllluuuuuuurrrrp! */ - if(security_init()) - return 1; + RAND_load_file("/dev/urandom", 1024); - if(setup_network_connections()) - cleanup_and_exit(1); + OpenSSL_add_all_algorithms(); - main_loop(); + if(generate_keys) { + read_server_config(); + return !keygen(generate_keys); + } - cleanup_and_exit(1); - return 1; -} + if(!read_server_config()) + return 1; -RETSIGTYPE -sigterm_handler(int a) -{ - if(debug_lvl > 0) - syslog(LOG_NOTICE, _("Got TERM signal")); - cleanup_and_exit(0); -} + if(lzo_init() != LZO_E_OK) { + logger(LOG_ERR, _("Error initializing LZO compressor!")); + return 1; + } -RETSIGTYPE -sigquit_handler(int a) -{ - if(debug_lvl > 0) - syslog(LOG_NOTICE, _("Got QUIT signal")); - cleanup_and_exit(0); -} +#ifdef HAVE_MINGW + if(WSAStartup(MAKEWORD(2, 2), &wsa_state)) { + logger(LOG_ERR, _("System call `%s' failed: %s"), "WSAStartup", winerror(GetLastError())); + return 1; + } -RETSIGTYPE -sigsegv_square(int a) -{ - syslog(LOG_NOTICE, _("Got another SEGV signal: not restarting")); - exit(0); + if(!do_detach || !init_service()) + return main2(argc, argv); + else + return 1; } -RETSIGTYPE -sigsegv_handler(int a) +int main2(int argc, char **argv) { - if(cp_file) - syslog(LOG_NOTICE, _("Got SEGV signal after %s line %d, trying to re-execute"), - cp_file, cp_line); - else - syslog(LOG_NOTICE, _("Got SEGV signal, trying to re-execute")); +#endif - signal(SIGSEGV, sigsegv_square); + if(!detach()) + return 1; + - close_network_connections(); - remove_pid(pidfilename); - execvp(g_argv[0], g_argv); -} + /* Setup sockets and open device. If it doesn't work, don't give up but try again. */ -RETSIGTYPE -sighup_handler(int a) -{ - if(debug_lvl > 0) - syslog(LOG_NOTICE, _("Got HUP signal")); - close_network_connections(); - setup_network_connections(); - /* FIXME: read config-file and re-establish network connections */ -} + while(!setup_network_connections()) { + if(do_detach) { + logger(LOG_NOTICE, _("Restarting in %d seconds!"), maxtimeout); + sleep(maxtimeout); + } else { + logger(LOG_ERR, _("Not restarting.")); + return 1; + } + } -RETSIGTYPE -sigint_handler(int a) -{ - if(debug_lvl > 0) - syslog(LOG_NOTICE, _("Got INT signal")); - cleanup_and_exit(0); -} + /* Start main loop. It only exits when tinc is killed. */ -RETSIGTYPE -sigusr1_handler(int a) -{ - dump_conn_list(); -} + int status; + status = main_loop(); -RETSIGTYPE -sigusr2_handler(int a) -{ - if(debug_lvl > 1) - syslog(LOG_NOTICE, _("Forcing new key generation")); - regenerate_keys(); -} + /* Shutdown properly. */ -RETSIGTYPE -sighuh(int a) -{ - if(cp_file) - syslog(LOG_NOTICE, _("Got unexpected signal %d after %s line %d"), - a, cp_file, cp_line); - else - syslog(LOG_NOTICE, _("Got unexpected signal %d"), a); -} + close_network_connections(); -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, parent_exit); -} + ifdebug(CONNECTIONS) + dump_device_stats(); -RETSIGTYPE parent_exit(int a) -{ - exit(0); + logger(LOG_NOTICE, _("Terminating")); + return status; }