/*
tincd.c -- the main file for tincd
- Copyright (C) 1998-2003 Ivo Timmermans <ivo@o2w.nl>
- 2000-2003 Guus Sliepen <guus@sliepen.eu.org>
+ Copyright (C) 1998-2005 Ivo Timmermans
+ 2000-2016 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: tincd.c,v 1.10.4.87 2003/09/08 21:52:47 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 "system.h"
#include <openssl/rsa.h>
#include <openssl/pem.h>
#include <openssl/evp.h>
+#include <openssl/engine.h>
+
+#ifdef HAVE_LZO
+#include LZO1X_H
+#endif
-#include <lzo1x.h>
+#ifndef HAVE_MINGW
+#include <pwd.h>
+#include <grp.h>
+#include <time.h>
+#endif
+#ifdef HAVE_GETOPT_LONG
#include <getopt.h>
+#else
+#include "getopt.h"
+#endif
+
+#include "pidfile.h"
#include "conf.h"
#include "device.h"
/* 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 *logfilename = NULL; /* log file location */
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},
{"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"
- " -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"));
+ 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, --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::k::n:K::", long_options, &option_index)) != EOF) {
+ 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 */
+ if(confbase) {
+ fprintf(stderr, "Only one configuration directory can be given.\n");
+ usage(true);
+ return false;
+ }
confbase = xstrdup(optarg);
break;
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 */
+ case 'd': /* increase debug level */
+ if(!optarg && optind < argc && *argv[optind] != '-')
+ optarg = argv[optind++];
if(optarg)
debug_level = atoi(optarg);
else
case 'k': /* kill old tincds */
#ifndef HAVE_MINGW
+ if(!optarg && optind < argc && *argv[optind] != '-')
+ optarg = argv[optind++];
if(optarg) {
if(!strcasecmp(optarg, "HUP"))
kill_tincd = SIGHUP;
kill_tincd = SIGINT;
else if(!strcasecmp(optarg, "ALRM"))
kill_tincd = SIGALRM;
+ else if(!strcasecmp(optarg, "ABRT"))
+ kill_tincd = SIGABRT;
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"),
+ 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;
break;
case 'n': /* net name given */
- netname = xstrdup(optarg);
+ /* netname "." is special: a "top-level name" */
+ if(netname) {
+ fprintf(stderr, "Only one netname can be given.\n");
+ usage(true);
+ return false;
+ }
+ if(optarg && strcmp(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 */
+ if(!optarg && optind < argc && *argv[optind] != '-')
+ optarg = argv[optind++];
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"),
+ 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;
+ 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 */
case 4: /* write log entries to a file */
use_logfile = true;
- if(optarg)
+ if(!optarg && optind < argc && *argv[optind] != '-')
+ optarg = argv[optind++];
+ if(optarg) {
+ if(logfilename) {
+ fprintf(stderr, "Only one logfile can be given.\n");
+ usage(true);
+ return false;
+ }
logfilename = xstrdup(optarg);
+ }
break;
case 5: /* write PID to a file */
+ if(pidfilename) {
+ fprintf(stderr, "Only one pidfile can be given.\n");
+ usage(true);
+ return false;
+ }
pidfilename = xstrdup(optarg);
break;
}
}
+ if(optind < argc) {
+ fprintf(stderr, "%s: unrecognized argument '%s'\n", argv[0], argv[optind]);
+ usage(true);
+ return false;
+ }
+
return true;
}
/* This function prettyprints the key generation process */
-static void indicator(int a, int b, void *p)
-{
+static void indicator(int a, int b, void *p) {
switch (a) {
case 0:
fprintf(stderr, ".");
Generate a public/private RSA keypair, and ask for a file to store
them in.
*/
-static bool keygen(int bits)
-{
+static bool keygen(int bits) {
RSA *rsa_key;
FILE *f;
- char *name = NULL;
- char *filename;
+ char *pubname, *privname;
- fprintf(stderr, _("Generating %d bits keys:\n"), bits);
- rsa_key = RSA_generate_key(bits, 0xFFFF, indicator, NULL);
+ 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"));
+ fprintf(stderr, "Error during key generation!\n");
return false;
} else
- fprintf(stderr, _("Done.\n"));
+ fprintf(stderr, "Done.\n");
- asprintf(&filename, "%s/rsa_key.priv", confbase);
- f = ask_and_open(filename, _("private RSA key"), "a");
+ xasprintf(&privname, "%s/rsa_key.priv", confbase);
+ f = ask_and_open(privname, "private RSA key");
+ free(privname);
if(!f)
return false;
-
+
#ifdef HAVE_FCHMOD
/* Make it unreadable for others. */
fchmod(fileno(f), 0600);
#endif
- if(ftell(f))
- fprintf(stderr, _("Appending key to existing contents.\nMake sure only one key is stored in the file.\n"));
-
+ fputc('\n', f);
PEM_write_RSAPrivateKey(f, rsa_key, NULL, NULL, 0, NULL, NULL);
fclose(f);
- free(filename);
- get_config_string(lookup_config(config_tree, "Name"), &name);
+ char *name = get_name();
- if(name)
- asprintf(&filename, "%s/hosts/%s", confbase, name);
- else
- asprintf(&filename, "%s/rsa_key.pub", confbase);
+ if(name) {
+ xasprintf(&pubname, "%s/hosts/%s", confbase, name);
+ free(name);
+ } else {
+ xasprintf(&pubname, "%s/rsa_key.pub", confbase);
+ }
- f = ask_and_open(filename, _("public RSA key"), "a");
+ f = ask_and_open(pubname, "public RSA key");
+ free(pubname);
if(!f)
return false;
- if(ftell(f))
- fprintf(stderr, _("Appending key to existing contents.\nMake sure only one key is stored in the file.\n"));
-
+ fputc('\n', f);
PEM_write_RSAPublicKey(f, rsa_key);
fclose(f);
- free(filename);
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] = "";
- long len = sizeof(installdir);
+ DWORD len = sizeof(installdir);
#endif
if(netname)
- asprintf(&identname, "tinc.%s", 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)
- asprintf(&logfilename, "%s/log/%s.log", identname);
+ if(!RegQueryValueEx(key, NULL, 0, 0, (LPBYTE)installdir, &len)) {
if(!confbase) {
if(netname)
- asprintf(&confbase, "%s/%s", installdir, netname);
+ xasprintf(&confbase, "%s/%s", installdir, netname);
else
- asprintf(&confbase, "%s", installdir);
+ xasprintf(&confbase, "%s", installdir);
}
+ if(!logfilename)
+ xasprintf(&logfilename, "%s/tinc.log", confbase);
}
RegCloseKey(key);
if(*installdir)
#endif
if(!pidfilename)
- asprintf(&pidfilename, LOCALSTATEDIR "/run/%s.pid", identname);
+ xasprintf(&pidfilename, LOCALSTATEDIR "/run/%s.pid", identname);
if(!logfilename)
- asprintf(&logfilename, LOCALSTATEDIR "/log/%s.log", identname);
+ xasprintf(&logfilename, LOCALSTATEDIR "/log/%s.log", identname);
if(netname) {
if(!confbase)
- asprintf(&confbase, CONFDIR "/tinc/%s", netname);
+ xasprintf(&confbase, CONFDIR "/tinc/%s", netname);
else
- logger(LOG_INFO, _("Both netname and configuration directory given, using the latter..."));
+ logger(LOG_INFO, "Both netname and configuration directory given, using the latter...");
} else {
if(!confbase)
- asprintf(&confbase, CONFDIR "/tinc");
+ xasprintf(&confbase, CONFDIR "/tinc");
}
}
-int main(int argc, char **argv)
-{
- program_name = argv[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);
+}
+
+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;
+ }
+#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(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;
+}
+
+#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
- setlocale(LC_ALL, "");
- bindtextdomain(PACKAGE, LOCALEDIR);
- textdomain(PACKAGE);
+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) 1998-2003 Ivo Timmermans, Guus Sliepen and others.\n"
+ printf("%s version %s\n", PACKAGE, VERSION);
+ printf("Copyright (C) 1998-2016 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;
}
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);
RAND_load_file("/dev/urandom", 1024);
+ ENGINE_load_builtin_engines();
+ ENGINE_register_all_complete();
+
OpenSSL_add_all_algorithms();
if(generate_keys) {
if(!read_server_config())
return 1;
+#ifdef HAVE_LZO
if(lzo_init() != LZO_E_OK) {
- logger(LOG_ERR, _("Error initializing LZO compressor!"));
+ logger(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()));
+ logger(LOG_ERR, "System call `%s' failed: %s", "WSAStartup", winerror(GetLastError()));
return 1;
}
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;
-
- /* Setup sockets and open device. If it doesn't work, don't give up but try again. */
-
- 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;
- }
+#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 */
+
+ 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. */
/* Shutdown properly. */
- close_network_connections();
-
ifdebug(CONNECTIONS)
- dump_device_stats();
+ devops.dump_stats();
+
+ close_network_connections();
- logger(LOG_NOTICE, _("Terminating"));
+end:
+ logger(LOG_NOTICE, "Terminating");
#ifndef HAVE_MINGW
remove_pid(pidfilename);
#endif
-
+
+ free(priority);
+
+ EVP_cleanup();
+ ENGINE_cleanup();
+ CRYPTO_cleanup_all_ex_data();
+ ERR_remove_state(0);
+ ERR_free_strings();
+
+ exit_configuration(&config_tree);
+ list_free(cmdline_conf);
+ free_names();
+
return status;
}
projects / tinc / blobdiff