/*
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
+ 2000-2009 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 1.10.4.75 2003/07/22 12:58:34 guus Exp $
+ $Id$
*/
#include "system.h"
#include <openssl/rsa.h>
#include <openssl/pem.h>
#include <openssl/evp.h>
+#include <openssl/engine.h>
-#include <lzo1x.h>
+#include LZO1X_H
+
+#ifndef HAVE_MINGW
+#include <pwd.h>
+#include <grp.h>
+#include <time.h>
+#endif
+
+#include <getopt.h>
+#include "pidfile.h"
#include "conf.h"
+#include "device.h"
#include "logger.h"
#include "net.h"
#include "netutl.h"
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;
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. */
-int use_logfile = 0;
+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},
- {"logfile", optional_argument, NULL, 'F'},
- {"pidfile", required_argument, NULL, 'P'},
+ {"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)
+#ifdef HAVE_MINGW
+static struct WSAData wsa_state;
+#endif
+
+static void usage(bool status)
{
- if(status != 0)
+ if(status)
fprintf(stderr, _("Try `%s --help\' for more information.\n"),
program_name);
else {
" -L, --mlock Lock tinc into main memory.\n"
" --logfile[=FILENAME] Write log entries to a logfile.\n"
" --pidfile=FILENAME Write PID to FILENAME.\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"));
+ printf(_("Report bugs to tinc@tinc-vpn.org.\n"));
}
-
- exit(status);
}
-static void parse_options(int argc, char **argv, char **envp)
+static bool parse_options(int argc, char **argv)
{
int r;
int option_index = 0;
- 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:K::RU:", long_options, &option_index)) != EOF) {
switch (r) {
case 0: /* long option */
break;
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)
break;
case 'k': /* kill old tincds */
+#ifndef HAVE_MINGW
if(optarg) {
if(!strcasecmp(optarg, "HUP"))
kill_tincd = SIGHUP;
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(1);
+ usage(true);
+ return false;
}
}
} else
kill_tincd = SIGTERM;
+#else
+ kill_tincd = 1;
+#endif
break;
case 'n': /* net name given */
if(generate_keys < 512) {
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 */
generate_keys = 1024;
break;
- case 'F': /* write log entries to a file */
- use_logfile = 1;
+ 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 'P': /* write PID to a file */
+ 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 */
Generate a public/private RSA keypair, and ask for a file to store
them in.
*/
-static int keygen(int bits)
+static bool keygen(int bits)
{
RSA *rsa_key;
FILE *f;
char *name = NULL;
char *filename;
+ get_config_string(lookup_config(config_tree, "Name"), &name);
+
+ if(name && !check_id(name)) {
+ fprintf(stderr, _("Invalid name for myself!\n"));
+ return false;
+ }
+
fprintf(stderr, _("Generating %d bits keys:\n"), bits);
- rsa_key = RSA_generate_key(bits, 0xFFFF, indicator, NULL);
+ rsa_key = RSA_generate_key(bits, 0x10001, indicator, NULL);
if(!rsa_key) {
fprintf(stderr, _("Error during key generation!\n"));
- return -1;
+ return false;
} else
fprintf(stderr, _("Done.\n"));
- get_config_string(lookup_config(config_tree, "Name"), &name);
+ asprintf(&filename, "%s/rsa_key.priv", confbase);
+ f = ask_and_open(filename, _("private 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);
if(name)
asprintf(&filename, "%s/hosts/%s", confbase, name);
else
asprintf(&filename, "%s/rsa_key.pub", confbase);
- f = ask_and_safe_open(filename, _("public RSA key"), "a");
+ 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_RSAPublicKey(f, rsa_key);
fclose(f);
free(filename);
+ if(name)
+ free(name);
- asprintf(&filename, "%s/rsa_key.priv", confbase);
- f = ask_and_safe_open(filename, _("private RSA key"), "a");
-
- if(!f)
- return -1;
-
- if(ftell(f))
- fprintf(stderr, _("Appending key to existing contents.\nMake sure only one key is stored in the file.\n"));
-
- PEM_write_RSAPrivateKey(f, rsa_key, NULL, NULL, 0, NULL, NULL);
- fclose(f);
- free(filename);
-
- return 0;
+ return true;
}
/*
*/
static void make_names(void)
{
+#ifdef HAVE_MINGW
+ HKEY key;
+ char installdir[1024] = "";
+ long len = sizeof(installdir);
+#endif
+
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
+
if(!pidfilename)
asprintf(&pidfilename, LOCALSTATEDIR "/run/%s.pid", identname);
if(netname) {
if(!confbase)
- asprintf(&confbase, "%s/tinc/%s", CONFDIR, netname);
+ asprintf(&confbase, CONFDIR "/tinc/%s", netname);
else
logger(LOG_INFO, _("Both netname and configuration directory given, using the latter..."));
} else {
if(!confbase)
- asprintf(&confbase, "%s/tinc", CONFDIR);
+ asprintf(&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);
+}
+
+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)
+#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)
{
program_name = argv[0];
bindtextdomain(PACKAGE, LOCALEDIR);
textdomain(PACKAGE);
- 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,
VERSION, __DATE__, __TIME__, PROT_CURRENT);
- printf(_("Copyright (C) 1998-2003 Ivo Timmermans, Guus Sliepen and others.\n"
+ 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"
return 0;
}
- if(show_help)
- usage(0);
+ if(show_help) {
+ usage(false);
+ return 0;
+ }
if(kill_tincd)
- exit(kill_other(kill_tincd));
+ return !kill_other(kill_tincd);
- openlogger("tinc", LOGMODE_STDERR);
-
- /* Lock all pages into memory if requested */
-
- 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;
- }
+ openlogger("tinc", use_logfile?LOGMODE_FILE:LOGMODE_STDERR);
g_argv = argv;
RAND_load_file("/dev/urandom", 1024);
+ ENGINE_load_builtin_engines();
+ ENGINE_register_all_complete();
+
OpenSSL_add_all_algorithms();
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;
if(lzo_init() != LZO_E_OK) {
logger(LOG_ERR, _("Error initializing LZO compressor!"));
- exit(1);
+ return 1;
}
- 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;
+ }
- logger(LOG_ERR, _("Unrecoverable error"));
- cp_trace();
+ if(!do_detach || !init_service())
+ return main2(argc, argv);
+ else
+ return 1;
+}
- if(do_detach) {
- logger(LOG_NOTICE, _("Restarting in %d seconds!"), maxtimeout);
- sleep(maxtimeout);
- } else {
- logger(LOG_ERR, _("Not restarting."));
- exit(1);
- }
+int main2(int argc, char **argv)
+{
+#endif
+
+ 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"))
+ 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;
+ }
+ }
+
+ /* 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;
}
projects / tinc / blobdiff