/*
tincd.c -- the main file for tincd
Copyright (C) 1998-2005 Ivo Timmermans
- 2000-2009 Guus Sliepen <guus@tinc-vpn.org>
+ 2000-2012 Guus Sliepen <guus@tinc-vpn.org>
+ 2008 Max Rijevski <maksuf@gmail.com>
+ 2009 Michael Tokarev <mjt@tls.msk.ru>
+ 2010 Julien Muchembled <jm@jmuchemb.eu>
+ 2010 Timothy Redaelli <timothy@redaelli.eu>
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
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.
-
- $Id$
+ 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 "system.h"
#include <sys/mman.h>
#endif
+#include <openssl/rand.h>
+#include <openssl/rsa.h>
+#include <openssl/pem.h>
+#include <openssl/evp.h>
+#include <openssl/engine.h>
+
+#ifdef HAVE_LZO
#include LZO1X_H
+#endif
+
+#ifndef HAVE_MINGW
+#include <pwd.h>
+#include <grp.h>
+#include <time.h>
+#endif
#include <getopt.h>
char *program_name = NULL;
/* 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;
+static 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;
+static 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 */
+char *identname = NULL; /* program name for syslog */
+char *logfilename = NULL; /* log file location */
+char *pidfilename = NULL;
+char **g_argv; /* a copy of the cmdline arguments */
-static int status;
+static int status = 1;
static struct option const long_options[] = {
{"config", required_argument, NULL, 'c'},
{"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},
+ {"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)
-{
+static void usage(bool status) {
if(status)
- fprintf(stderr, _("Try `%s --help\' for more information.\n"),
+ 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"
" -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"
+ " --pidfile=FILENAME Write PID and control socket cookie to FILENAME.\n"
" --bypass-security Disables meta protocol security, for debugging.\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"));
+ " -o, --option[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@tinc-vpn.org.\n");
}
}
-static bool parse_options(int argc, char **argv)
-{
+static bool parse_options(int argc, char **argv) {
+ config_t *cfg;
int r;
int option_index = 0;
+ int lineno = 0;
+
+ cmdline_conf = list_alloc((list_action_t)free_config);
- while((r = getopt_long(argc, argv, "c:DLd::n:", long_options, &option_index)) != EOF) {
+ while((r = getopt_long(argc, argv, "c:DLd::n:o:RU:", long_options, &option_index)) != EOF) {
switch (r) {
- case 0: /* long option */
+ case 0: /* long option */
break;
- case 'c': /* config file */
+ case 'c': /* config file */
confbase = xstrdup(optarg);
break;
- case 'D': /* no detach */
+ case 'D': /* no detach */
do_detach = false;
break;
- case 'L': /* no detach */
+ case 'L': /* no detach */
+#ifndef HAVE_MLOCKALL
+ logger(DEBUG_ALWAYS, LOG_ERR, "%s not supported on this platform", "mlockall()");
+ return false;
+#else
do_mlock = true;
break;
+#endif
- case 'd': /* inc debug level */
+ case 'd': /* inc debug level */
if(optarg)
debug_level = atoi(optarg);
else
debug_level++;
break;
- case 'n': /* net name given */
+ case 'n': /* net name given */
netname = xstrdup(optarg);
break;
- case 1: /* show help */
+ case 'o': /* option */
+ cfg = parse_config_line(optarg, NULL, ++lineno);
+ if (!cfg)
+ return false;
+ list_insert_tail(cmdline_conf, cfg);
+ 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 */
+ case 2: /* show version */
show_version = true;
break;
- case 3: /* bypass security */
+ case 3: /* bypass security */
bypass_security = true;
break;
- case 4: /* write log entries to a file */
+ 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);
+ case 5: /* open control socket here */
+ pidfilename = xstrdup(optarg);
break;
- case '?':
+ case '?': /* wrong options */
usage(true);
return false;
}
}
+ if(!netname && (netname = getenv("NETNAME")))
+ netname = xstrdup(netname);
+
+ /* netname "." is special: a "top-level name" */
+
+ if(netname && (!*netname || !strcmp(netname, "."))) {
+ free(netname);
+ netname = NULL;
+ }
+
+ if(netname && (strpbrk(netname, "\\/") || *netname == '.')) {
+ fprintf(stderr, "Invalid character in netname!\n");
+ return false;
+ }
+
return true;
}
/*
Set all files and paths according to netname
*/
-static void make_names(void)
-{
+static void make_names(void) {
#ifdef HAVE_MINGW
HKEY key;
char installdir[1024] = "";
#endif
if(netname)
- asprintf(&identname, "tinc.%s", netname);
+ xasprintf(&identname, "tinc.%s", netname);
else
identname = xstrdup("tinc");
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);
+ xasprintf(&logfilename, "%s" SLASH "log" SLASH "%s.log", identname);
if(!confbase) {
if(netname)
- asprintf(&confbase, "%s/%s", installdir, netname);
+ xasprintf(&confbase, "%s" SLASH "%s", installdir, netname);
else
- asprintf(&confbase, "%s", installdir);
+ xasprintf(&confbase, "%s", installdir);
}
+ if(!pidfilename)
+ xasprintf(&pidfilename, "%s" SLASH "pid", confbase);
}
RegCloseKey(key);
if(*installdir)
}
#endif
- if(!controlsocketname)
- asprintf(&controlsocketname, "%s/run/%s.control/socket", LOCALSTATEDIR, identname);
-
if(!logfilename)
- asprintf(&logfilename, LOCALSTATEDIR "/log/%s.log", identname);
+ xasprintf(&logfilename, LOCALSTATEDIR SLASH "log" SLASH "%s.log", identname);
+
+ if(!pidfilename)
+ xasprintf(&pidfilename, LOCALSTATEDIR SLASH "run" SLASH "%s.pid", identname);
if(netname) {
if(!confbase)
- asprintf(&confbase, CONFDIR "/tinc/%s", netname);
+ xasprintf(&confbase, CONFDIR SLASH "tinc" SLASH "%s", netname);
else
- logger(LOG_INFO, _("Both netname and configuration directory given, using the latter..."));
+ logger(DEBUG_ALWAYS, LOG_INFO, "Both netname and configuration directory given, using the latter...");
} else {
if(!confbase)
- asprintf(&confbase, CONFDIR "/tinc");
+ xasprintf(&confbase, CONFDIR SLASH "tinc");
}
}
-static void free_names() {
+static void free_names(void) {
if (identname) free(identname);
if (netname) free(netname);
- if (controlsocketname) free(controlsocketname);
+ if (pidfilename) free(pidfilename);
if (logfilename) free(logfilename);
if (confbase) free(confbase);
}
-int main(int argc, char **argv)
-{
- program_name = argv[0];
+static bool drop_privs(void) {
+#ifdef HAVE_MINGW
+ if (switchuser) {
+ logger(DEBUG_ALWAYS, LOG_ERR, "%s not supported on this platform", "-U");
+ return false;
+ }
+ if (do_chroot) {
+ logger(DEBUG_ALWAYS, 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(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(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(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(DEBUG_ALWAYS, LOG_ERR, "System call `%s' failed: %s",
+ "setuid", strerror(errno));
+ return false;
+ }
+#endif
+ return true;
+}
- setlocale(LC_ALL, "");
- bindtextdomain(PACKAGE, LOCALEDIR);
- textdomain(PACKAGE);
+#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) (setpriority(PRIO_PROCESS, 0, (level)))
+#endif
+
+int main(int argc, char **argv) {
+ program_name = argv[0];
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"
+ printf("%s version %s (built %s %s, protocol %d.%d)\n", PACKAGE,
+ VERSION, __DATE__, __TIME__, PROT_MAJOR, PROT_MINOR);
+ printf("Copyright (C) 1998-2012 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;
}
return 0;
}
- openlogger("tinc", use_logfile?LOGMODE_FILE:LOGMODE_STDERR);
-
- if(!event_init()) {
- logger(LOG_ERR, _("Error initializing libevent!"));
+#ifdef HAVE_MINGW
+ if(WSAStartup(MAKEWORD(2, 2), &wsa_state)) {
+ logger(DEBUG_ALWAYS, LOG_ERR, "System call `%s' failed: %s", "WSAStartup", winerror(GetLastError()));
return 1;
}
+#endif
- if(!init_control())
- return 1;
+ openlogger("tinc", use_logfile?LOGMODE_FILE:LOGMODE_STDERR);
- /* Lock all pages into memory if requested */
+ g_argv = argv;
- 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!"));
+ if(getenv("LISTEN_PID") && atoi(getenv("LISTEN_PID")) == getpid())
+ do_detach = false;
+#ifdef HAVE_UNSETENV
+ unsetenv("LISTEN_PID");
#endif
- return -1;
- }
-
- g_argv = argv;
init_configuration(&config_tree);
if(!read_server_config())
return 1;
+#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;
- }
-
if(!do_detach || !init_service())
return main2(argc, argv);
else
return 1;
}
-int main2(int argc, char **argv)
-{
+int main2(int argc, char **argv) {
+ InitializeCriticalSection(&mutex);
+ EnterCriticalSection(&mutex);
#endif
+ char *priority = NULL;
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(DEBUG_ALWAYS, LOG_ERR, "System call `%s' failed: %s", "mlockall",
+ strerror(errno));
+ return 1;
+ }
+#endif
+
+ if(!event_init()) {
+ logger(DEBUG_ALWAYS, LOG_ERR, "Error initializing libevent!");
+ return 1;
+ }
/* Setup sockets and open device. */
- if(!setup_network_connections())
+ if(!setup_network())
+ goto end_nonet;
+
+ if(!init_control())
+ goto end_nonet;
+
+ /* Initiate all outgoing connections. */
+
+ try_outgoing_connections();
+
+ /* Change process priority */
+
+ 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())
goto end;
/* Start main loop. It only exits when tinc is killed. */
/* Shutdown properly. */
- ifdebug(CONNECTIONS)
- dump_device_stats();
+ if(debug_level >= DEBUG_CONNECTIONS)
+ devops.dump_stats();
close_network_connections();
end:
- logger(LOG_NOTICE, _("Terminating"));
-
-#ifndef HAVE_MINGW
exit_control();
-#endif
+
+end_nonet:
+ logger(DEBUG_ALWAYS, LOG_NOTICE, "Terminating");
+
+ free(priority);
crypto_exit();
+ exit_configuration(&config_tree);
+ free(cmdline_conf);
+ free_names();
+
return status;
}
projects / tinc / blobdiff