/*
tincd.c -- the main file for tincd
Copyright (C) 1998-2005 Ivo Timmermans
- 2000-2011 Guus Sliepen <guus@tinc-vpn.org>
+ 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>
#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
#include <time.h>
#endif
-#include <getopt.h>
-
#include "conf.h"
#include "control.h"
#include "crypto.h"
#include "device.h"
+#include "event.h"
#include "logger.h"
+#include "names.h"
#include "net.h"
#include "netutl.h"
#include "process.h"
#include "protocol.h"
#include "utils.h"
#include "xalloc.h"
-
-/* The name this program was run with. */
-char *program_name = NULL;
+#include "version.h"
/* If nonzero, display usage information and exit. */
static bool show_help = false;
/* If nonzero, use null ciphers and skip all key exchanges. */
bool bypass_security = false;
+#ifdef HAVE_MLOCKALL
/* If nonzero, disable swapping for this process. */
static bool do_mlock = false;
+#endif
+#ifndef HAVE_MINGW
/* 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;
+#endif
/* If nonzero, write log entries to a separate file. */
bool use_logfile = false;
-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 */
+/* If nonzero, use syslog instead of stderr in no-detach mode. */
+bool use_syslog = false;
+
+char **g_argv; /* a copy of the cmdline arguments */
static int status = 1;
{"chroot", no_argument, NULL, 'R'},
{"user", required_argument, NULL, 'U'},
{"logfile", optional_argument, NULL, 4},
+ {"syslog", no_argument, NULL, 's'},
{"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
program_name);
else {
printf("Usage: %s [option]...\n\n", program_name);
- printf( " -c, --config=DIR Read configuration options from DIR.\n"
+ 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"
+#ifdef HAVE_MLOCKALL
" -L, --mlock Lock tinc into main memory.\n"
+#endif
" --logfile[=FILENAME] Write log entries to a logfile.\n"
+ " -s --syslog Use syslog instead of stderr with --no-detach.\n"
" --pidfile=FILENAME Write PID and control socket cookie to FILENAME.\n"
" --bypass-security Disables meta protocol security, for debugging.\n"
" -o, --option[HOST.]KEY=VALUE Set global/host configuration value.\n"
+#ifndef HAVE_MINGW
" -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"
+ " -U, --user=USER setuid to given USER at startup.\n"
+#endif
+ " --help Display this help and exit.\n"
" --version Output version information and exit.\n\n");
printf("Report bugs to tinc@tinc-vpn.org.\n");
}
cmdline_conf = list_alloc((list_action_t)free_config);
- while((r = getopt_long(argc, argv, "c:DLd::n:o:RU:", long_options, &option_index)) != EOF) {
+ while((r = getopt_long(argc, argv, "c:DLd::n:so: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()");
+ logger(DEBUG_ALWAYS, LOG_ERR, "The %s option is not supported on this platform.", argv[optind - 1]);
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
debug_level++;
break;
- case 'n': /* net name given */
- /* netname "." is special: a "top-level name" */
- netname = strcmp(optarg, ".") != 0 ?
- xstrdup(optarg) : NULL;
+ case 'n': /* net name given */
+ netname = xstrdup(optarg);
break;
- case 'o': /* option */
+ case 's': /* syslog */
+ use_logfile = false;
+ use_syslog = true;
+ break;
+
+ 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 */
+#ifdef HAVE_MINGW
+ case 'R':
+ case 'U':
+ logger(DEBUG_ALWAYS, LOG_ERR, "The %s option is not supported on this platform.", argv[optind - 1]);
+ return false;
+#else
+ case 'R': /* chroot to NETNAME dir */
do_chroot = true;
break;
- case 'U': /* setuid to USER */
+ case 'U': /* setuid to USER */
switchuser = optarg;
break;
+#endif
- case 1: /* show help */
+ 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_syslog = false;
use_logfile = true;
+ if(!optarg && optind < argc && *argv[optind] != '-')
+ optarg = argv[optind++];
if(optarg)
logfilename = xstrdup(optarg);
break;
- case 5: /* open control socket here */
+ case 5: /* open control socket here */
pidfilename = xstrdup(optarg);
break;
- case '?':
+ case '?': /* wrong options */
usage(true);
return false;
}
}
- return true;
-}
+ if(optind < argc) {
+ fprintf(stderr, "%s: unrecognized argument '%s'\n", argv[0], argv[optind]);
+ usage(true);
+ return false;
+ }
-/*
- Set all files and paths according to netname
-*/
-static void make_names(void) {
-#ifdef HAVE_MINGW
- HKEY key;
- char installdir[1024] = "";
- long len = sizeof installdir;
-#endif
+ if(!netname && (netname = getenv("NETNAME")))
+ netname = xstrdup(netname);
- if(netname)
- xasprintf(&identname, "tinc.%s", netname);
- else
- identname = xstrdup("tinc");
+ /* netname "." is special: a "top-level name" */
-#ifdef HAVE_MINGW
- if(!RegOpenKeyEx(HKEY_LOCAL_MACHINE, "SOFTWARE\\tinc", 0, KEY_READ, &key)) {
- if(!RegQueryValueEx(key, NULL, 0, 0, installdir, &len)) {
- if(!logfilename)
- xasprintf(&logfilename, "%s/log/%s.log", identname);
- if(!confbase) {
- if(netname)
- xasprintf(&confbase, "%s/%s", installdir, netname);
- else
- xasprintf(&confbase, "%s", installdir);
- }
- if(!pidfilename)
- xasprintf(&pidfilename, "%s/pid", confbase);
- }
- RegCloseKey(key);
- if(*installdir)
- return;
+ if(netname && (!*netname || !strcmp(netname, "."))) {
+ free(netname);
+ netname = NULL;
}
-#endif
-
- if(!logfilename)
- xasprintf(&logfilename, LOCALSTATEDIR "/log/%s.log", identname);
-
- if(!pidfilename)
- xasprintf(&pidfilename, LOCALSTATEDIR "/run/%s.pid", identname);
- if(netname) {
- if(!confbase)
- xasprintf(&confbase, CONFDIR "/tinc/%s", netname);
- else
- logger(DEBUG_ALWAYS, LOG_INFO, "Both netname and configuration directory given, using the latter...");
- } else {
- if(!confbase)
- xasprintf(&confbase, CONFDIR "/tinc");
+ if(netname && !check_netname(netname, false)) {
+ fprintf(stderr, "Invalid character in netname!\n");
+ return false;
}
-}
-static void free_names(void) {
- if (identname) free(identname);
- if (netname) free(netname);
- if (pidfilename) free(pidfilename);
- if (logfilename) free(logfilename);
- if (confbase) free(confbase);
+ if(netname && !check_netname(netname, true))
+ fprintf(stderr, "Warning: unsafe character in netname!\n");
+
+ return true;
}
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
+#ifndef HAVE_MINGW
uid_t uid = 0;
if (switchuser) {
struct passwd *pw = getpwnam(switchuser);
"initgroups", strerror(errno));
return false;
}
+#ifndef __ANDROID__
+// Not supported in android NDK
endgrent();
endpwent();
+#endif
}
if (do_chroot) {
- tzset(); /* for proper timestamps in logs */
+ 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));
#ifdef HAVE_MINGW
# define setpriority(level) !SetPriorityClass(GetCurrentProcess(), (level))
+
+static void stop_handler(void *data, int flags) {
+ event_exit();
+}
+
+static BOOL WINAPI console_ctrl_handler(DWORD type) {
+ logger(DEBUG_ALWAYS, LOG_NOTICE, "Got console shutdown request");
+ if (WSASetEvent(stop_io.event) == FALSE)
+ abort();
+ return TRUE;
+}
#else
# define NORMAL_PRIORITY_CLASS 0
# define BELOW_NORMAL_PRIORITY_CLASS 10
if(!parse_options(argc, argv))
return 1;
-
- make_names();
+
+ make_names(true);
+ chdir(confbase);
if(show_version) {
printf("%s version %s (built %s %s, protocol %d.%d)\n", PACKAGE,
- VERSION, __DATE__, __TIME__, PROT_MAJOR, PROT_MINOR);
- printf("Copyright (C) 1998-2011 Ivo Timmermans, Guus Sliepen and others.\n"
+ BUILD_VERSION, BUILD_DATE, BUILD_TIME, PROT_MAJOR, PROT_MINOR);
+ 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"
logger(DEBUG_ALWAYS, LOG_ERR, "System call `%s' failed: %s", "WSAStartup", winerror(GetLastError()));
return 1;
}
+#else
+ // Check if we got an umbilical fd from the process that started us
+ char *umbstr = getenv("TINC_UMBILICAL");
+ if(umbstr) {
+ umbilical = atoi(umbstr);
+ if(fcntl(umbilical, F_GETFL) < 0)
+ umbilical = 0;
+#ifdef FD_CLOEXEC
+ if(umbilical)
+ fcntl(umbilical, F_SETFD, FD_CLOEXEC);
+#endif
+ }
#endif
openlogger("tinc", use_logfile?LOGMODE_FILE:LOGMODE_STDERR);
- if(!event_init()) {
- logger(DEBUG_ALWAYS, LOG_ERR, "Error initializing libevent!");
- return 1;
- }
-
g_argv = argv;
+ if(getenv("LISTEN_PID") && atoi(getenv("LISTEN_PID")) == getpid())
+ do_detach = false;
+#ifdef HAVE_UNSETENV
+ unsetenv("LISTEN_PID");
+#endif
+
init_configuration(&config_tree);
/* Slllluuuuuuurrrrp! */
- srand(time(NULL));
+ gettimeofday(&now, NULL);
+ srand(now.tv_sec + now.tv_usec);
crypto_init();
if(!read_server_config())
#endif
#ifdef HAVE_MINGW
- if(!do_detach || !init_service())
- return main2(argc, argv);
- else
- return 1;
+ io_add_event(&stop_io, stop_handler, NULL, WSACreateEvent());
+ if (stop_io.event == FALSE)
+ abort();
+
+ int result;
+ if(!do_detach || !init_service()) {
+ SetConsoleCtrlHandler(console_ctrl_handler, TRUE);
+ result = main2(argc, argv);
+ } else
+ result = 1;
+
+ if (WSACloseEvent(stop_io.event) == FALSE)
+ abort();
+ io_del(&stop_io);
+ return result;
}
int main2(int argc, char **argv) {
- InitializeCriticalSection(&mutex);
- EnterCriticalSection(&mutex);
#endif
- char *priority = NULL;
+ char *priority = NULL;
if(!detach())
return 1;
/* Setup sockets and open device. */
if(!setup_network())
- goto end_nonet;
-
- if(!init_control())
- goto end_nonet;
-
- /* Initiate all outgoing connections. */
-
- try_outgoing_connections();
+ goto end;
/* 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;
- }
- }
+ 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())
/* Start main loop. It only exits when tinc is killed. */
- status = main_loop();
+ logger(DEBUG_ALWAYS, LOG_NOTICE, "Ready");
- /* Shutdown properly. */
+ if(umbilical) { // snip!
+ write(umbilical, "", 1);
+ close(umbilical);
+ umbilical = 0;
+ }
+
+ try_outgoing_connections();
- if(debug_level >= DEBUG_CONNECTIONS)
- devops.dump_stats();
+ status = main_loop();
- close_network_connections();
+ /* Shutdown properly. */
end:
- exit_control();
+ close_network_connections();
-end_nonet:
logger(DEBUG_ALWAYS, LOG_NOTICE, "Terminating");
free(priority);
projects / tinc / blobdiff