/*
tincd.c -- the main file for tincd
- Copyright (C) 1998,1999,2000 Ivo Timmermans <itimmermans@bigfoot.com>
- 2000 Guus Sliepen <guus@sliepen.warande.net>
+ Copyright (C) 1998-2005 Ivo Timmermans
+ 2000-2009 Guus Sliepen <guus@tinc-vpn.org>
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
along with this program; if not, write to the Free Software
Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
- $Id: tincd.c,v 1.10.4.31 2000/11/20 18:06:17 zarq Exp $
+ $Id$
*/
-#include "config.h"
+#include "system.h"
-#include <errno.h>
-#include <fcntl.h>
-#include <getopt.h>
-#include <signal.h>
-#include <stdio.h>
-#include <sys/types.h>
-#include <syslog.h>
-#include <unistd.h>
-#include <signal.h>
-#include <string.h>
-#include <termios.h>
-
-#ifdef HAVE_SYS_IOCTL_H
-# include <sys/ioctl.h>
+/* Darwin (MacOS/X) needs the following definition... */
+#ifndef _P1003_1B_VISIBLE
+#define _P1003_1B_VISIBLE
#endif
-#ifdef HAVE_OPENSSL_RAND_H
-# include <openssl/rand.h>
-#else
-# include <rand.h>
+#ifdef HAVE_SYS_MMAN_H
+#include <sys/mman.h>
#endif
-#ifdef HAVE_OPENSSL_RSA_H
-# include <openssl/rsa.h>
-#else
-# include <rsa.h>
-#endif
+#include LZO1X_H
-#ifdef HAVE_OPENSSL_ERR_H
-# include <openssl/err.h>
-#else
-# include <err.h>
+#ifndef HAVE_MINGW
+#include <pwd.h>
+#include <grp.h>
+#include <time.h>
#endif
-
-
-#include <utils.h>
-#include <xalloc.h>
+#include <getopt.h>
#include "conf.h"
+#include "control.h"
+#include "crypto.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;
-
-/* 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. */
-extern int do_detach;
-
-/* 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 */
-char **g_argv; /* a copy of the cmdline arguments */
-char **environment; /* A pointer to the environment on
- startup */
+bool show_version = false;
+
+/* 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 *controlsocketname = NULL; /* control socket 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'},
+ {"net", required_argument, NULL, 'n'},
+ {"help", no_argument, NULL, 1},
+ {"version", no_argument, NULL, 2},
+ {"no-detach", no_argument, NULL, 'D'},
+ {"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},
+ {"controlsocket", required_argument, NULL, 5},
+ {NULL, 0, NULL, 0}
+};
-void cleanup_and_exit(int);
-int kill_other(void);
-void make_names(void);
-int write_pidfile(void);
+#ifdef HAVE_MINGW
+static struct WSAData wsa_state;
+#endif
-static struct option const long_options[] =
+static void usage(bool status)
{
- { "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 }
-};
+ 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"
+ " -n, --net=NETNAME Connect to net NETNAME.\n"
+ " -L, --mlock Lock tinc into main memory.\n"
+ " --logfile[=FILENAME] Write log entries to a logfile.\n"
+ " --controlsocket=FILENAME Open control socket at FILENAME.\n"
+ " --bypass-security Disables meta protocol security, for debugging.\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"));
+ }
+}
-static void
-usage(int status)
+static bool parse_options(int argc, char **argv)
{
- 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);
+ int r;
+ int option_index = 0;
+
+ while((r = getopt_long(argc, argv, "c:DLd::n: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
+
+ case 'd': /* inc debug level */
+ if(optarg)
+ debug_level = atoi(optarg);
+ else
+ debug_level++;
+ break;
+
+ case 'n': /* net name given */
+ netname = xstrdup(optarg);
+ 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: /* open control socket here */
+ controlsocketname = xstrdup(optarg);
+ break;
+
+ case '?':
+ usage(true);
+ return false;
+
+ default:
+ break;
+ }
+ }
+
+ return true;
}
-void
-parse_options(int argc, char **argv, char **envp)
+/*
+ Set all files and paths according to netname
+*/
+static void make_names(void)
{
- 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;
- }
- }
-}
+#ifdef HAVE_MINGW
+ HKEY key;
+ char installdir[1024] = "";
+ long len = sizeof installdir;
+#endif
-/* This function prettyprints the key generation process */
+ if(netname)
+ asprintf(&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)
+ asprintf(&logfilename, "%s/log/%s.log", identname);
+ if(!confbase) {
+ if(netname)
+ asprintf(&confbase, "%s/%s", installdir, netname);
+ else
+ asprintf(&confbase, "%s", installdir);
+ }
+ }
+ RegCloseKey(key);
+ if(*installdir)
+ return;
+ }
+#endif
-void indicator(int a, int b, void *p)
-{
- 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, "?");
- }
+ if(!controlsocketname)
+ asprintf(&controlsocketname, "%s/run/%s.control/socket", LOCALSTATEDIR, identname);
+
+ if(!logfilename)
+ asprintf(&logfilename, LOCALSTATEDIR "/log/%s.log", identname);
+
+ if(netname) {
+ if(!confbase)
+ asprintf(&confbase, CONFDIR "/tinc/%s", netname);
+ else
+ logger(LOG_INFO, _("Both netname and configuration directory given, using the latter..."));
+ } else {
+ if(!confbase)
+ asprintf(&confbase, CONFDIR "/tinc");
+ }
}
-/* Generate a public/private RSA keypair, and possibly store it into the configuration file. */
+static void free_names() {
+ if (identname) free(identname);
+ if (netname) free(netname);
+ if (controlsocketname) free(controlsocketname);
+ if (logfilename) free(logfilename);
+ if (confbase) free(confbase);
+}
-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;
+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;
}
-/*
- Set all files and paths according to netname
-*/
-void make_names(void)
+#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)
{
- 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";
- }
+ 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;
+ }
+
+ if(show_help) {
+ usage(false);
+ return 0;
+ }
+
+ openlogger("tinc", use_logfile?LOGMODE_FILE:LOGMODE_STDERR);
+
+ if(!event_init()) {
+ logger(LOG_ERR, _("Error initializing libevent!"));
+ return 1;
+ }
+
+ if(!init_control())
+ return 1;
+
+ g_argv = argv;
+
+ init_configuration(&config_tree);
+
+ /* Slllluuuuuuurrrrp! */
+
+ srand(time(NULL));
+ crypto_init();
+
+ if(!read_server_config())
+ return 1;
+
+ if(lzo_init() != LZO_E_OK) {
+ logger(LOG_ERR, _("Error initializing LZO compressor!"));
+ return 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;
}
-int
-main(int argc, char **argv, char **envp)
+int main2(int argc, char **argv)
{
- program_name = argv[0];
+#endif
- setlocale (LC_ALL, "");
- bindtextdomain (PACKAGE, LOCALEDIR);
- textdomain (PACKAGE);
+ 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
- /* Do some intl stuff right now */
-
- unknown = _("unknown");
+ /* Setup sockets and open device. */
- environment = envp;
- parse_options(argc, argv, envp);
+ if(!setup_network())
+ goto end;
- 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"));
+ /* Initiate all outgoing connections. */
- return 0;
- }
+ try_outgoing_connections();
- if(show_help)
- usage(0);
+ /* Change process priority */
- if(geteuid())
- {
- fprintf(stderr, _("You must be root to run this program. Sorry.\n"));
- return 1;
- }
+ char *priority = 0;
- g_argv = argv;
+ 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;
+ }
+ }
- make_names();
+ /* drop privileges */
+ if (!drop_privs())
+ goto end;
- /* Slllluuuuuuurrrrp! */
+ /* Start main loop. It only exits when tinc is killed. */
- RAND_load_file("/dev/urandom", 1024);
+ status = main_loop();
- if(generate_keys)
- exit(keygen(generate_keys));
+ /* Shutdown properly. */
- if(kill_tincd)
- exit(kill_other());
+ ifdebug(CONNECTIONS)
+ dump_device_stats();
- if(read_server_config())
- return 1;
+ close_network_connections();
- if(detach())
- exit(0);
+end:
+ logger(LOG_NOTICE, _("Terminating"));
- 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);
- }
- }
-}
+#ifndef HAVE_MINGW
+ exit_control();
+#endif
+
+ crypto_exit();
+ exit_configuration(&config_tree);
+ free_names();
+
+ return status;
+}