X-Git-Url: https://www.tinc-vpn.org/git/browse?a=blobdiff_plain;f=src%2Ftincd.c;h=4c33dc070e1bd330802704cee9f0059e1460d2f0;hb=c8402791b82947c49ba1d04f855dab04191607ca;hp=06e6713056c4c0b09027920eae32bdf0f4b2c702;hpb=3d787920d51a35e74e442c7265be3b13b69ad8e4;p=tinc

diff --git a/src/tincd.c b/src/tincd.c
index 06e67130..4c33dc07 100644
--- a/src/tincd.c
+++ b/src/tincd.c
@@ -55,6 +55,9 @@
 #include "xalloc.h"
 #include "version.h"
 #include "random.h"
+#include "sandbox.h"
+#include "watchdog.h"
+#include "fs.h"
 
 /* If nonzero, display usage information and exit. */
 static bool show_help = false;
@@ -130,7 +133,7 @@ static void usage(bool status) {
 		fprintf(stderr, "Try `%s --help\' for more information.\n",
 		        program_name);
 	else {
-		static const char *message =
+		fprintf(stdout,
 		        "Usage: %s [option]...\n"
 		        "\n"
 		        "  -c, --config=DIR              Read configuration options from DIR.\n"
@@ -152,9 +155,8 @@ static void usage(bool status) {
 		        "      --help                    Display this help and exit.\n"
 		        "      --version                 Output version information and exit.\n"
 		        "\n"
-		        "Report bugs to tinc@tinc-vpn.org.\n";
-
-		printf(message, program_name);
+		        "Report bugs to tinc@tinc-vpn.org.\n",
+		        program_name);
 	}
 }
 
@@ -185,6 +187,7 @@ static bool parse_options(int argc, char **argv) {
 			goto exit_fail;
 
 		case OPT_CONFIG_FILE:
+			assert(optarg);
 			free(confbase);
 			confbase = get_path_arg(optarg);
 			break;
@@ -216,6 +219,7 @@ static bool parse_options(int argc, char **argv) {
 			break;
 
 		case OPT_NETNAME:
+			assert(optarg);
 			free(netname);
 			netname = xstrdup(optarg);
 			break;
@@ -280,6 +284,7 @@ static bool parse_options(int argc, char **argv) {
 			break;
 
 		case OPT_PIDFILE:
+			assert(optarg);
 			free(pidfilename);
 			pidfilename = get_path_arg(optarg);
 			break;
@@ -323,6 +328,44 @@ exit_fail:
 	return false;
 }
 
+static bool read_sandbox_level(void) {
+	sandbox_level_t level;
+	char *value = NULL;
+
+	if(get_config_string(lookup_config(&config_tree, "Sandbox"), &value)) {
+		if(!strcasecmp("off", value)) {
+			level = SANDBOX_NONE;
+		} else if(!strcasecmp("normal", value)) {
+			level = SANDBOX_NORMAL;
+		} else if(!strcasecmp("high", value)) {
+			level = SANDBOX_HIGH;
+		} else {
+			logger(DEBUG_ALWAYS, LOG_ERR, "Bad sandbox value %s!", value);
+			free(value);
+			return false;
+		}
+
+		free(value);
+	} else {
+#ifdef HAVE_SANDBOX
+		level = SANDBOX_NORMAL;
+#else
+		level = SANDBOX_NONE;
+#endif
+	}
+
+#ifndef HAVE_SANDBOX
+
+	if(level > SANDBOX_NONE) {
+		logger(DEBUG_ALWAYS, LOG_ERR, "Sandbox is used but is not supported on this platform");
+		return false;
+	}
+
+#endif
+	sandbox_set_level(level);
+	return true;
+}
+
 static bool drop_privs(void) {
 #ifndef HAVE_WINDOWS
 	uid_t uid = 0;
@@ -373,8 +416,11 @@ static bool drop_privs(void) {
 			return false;
 		}
 
-#endif
-	return true;
+#endif // HAVE_WINDOWS
+
+	makedirs(DIR_CACHE | DIR_HOSTS | DIR_INVITATIONS);
+
+	return sandbox_enter();
 }
 
 #ifdef HAVE_WINDOWS
@@ -419,7 +465,7 @@ int main(int argc, char **argv) {
 	}
 
 	if(show_version) {
-		static const char *message =
+		fprintf(stdout,
 		        "%s version %s (built %s %s, protocol %d.%d)\n"
 		        "Features:"
 #ifdef HAVE_OPENSSL
@@ -449,11 +495,17 @@ int main(int argc, char **argv) {
 #ifdef HAVE_MINIUPNPC
 		        " miniupnpc"
 #endif
+#ifdef HAVE_SANDBOX
+		        " sandbox"
+#endif
 #ifdef ENABLE_UML
 		        " uml"
 #endif
 #ifdef ENABLE_VDE
 		        " vde"
+#endif
+#ifdef HAVE_WATCHDOG
+		        " watchdog"
 #endif
 		        "\n\n"
 		        "Copyright (C) 1998-2021 Ivo Timmermans, Guus Sliepen and others.\n"
@@ -461,9 +513,8 @@ int main(int argc, char **argv) {
 		        "\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";
-
-		printf(message, PACKAGE, BUILD_VERSION, BUILD_DATE, BUILD_TIME, PROT_MAJOR, PROT_MINOR);
+		        "see the file COPYING for details.\n",
+		        PACKAGE, BUILD_VERSION, BUILD_DATE, BUILD_TIME, PROT_MAJOR, PROT_MINOR);
 		return 0;
 	}
 
@@ -515,7 +566,9 @@ int main(int argc, char **argv) {
 
 	g_argv = argv;
 
-	if(getenv("LISTEN_PID") && atoi(getenv("LISTEN_PID")) == getpid()) {
+	const char *listen_pid = getenv("LISTEN_PID");
+
+	if(listen_pid && atoi(listen_pid) == getpid()) {
 		do_detach = false;
 	}
 
@@ -532,6 +585,10 @@ int main(int argc, char **argv) {
 		return 1;
 	}
 
+	if(!read_sandbox_level()) {
+		return 1;
+	}
+
 	if(debug_level == DEBUG_NOTHING) {
 		int level = 0;
 
@@ -646,8 +703,16 @@ int main2(int argc, char **argv) {
 
 	try_outgoing_connections();
 
+#ifdef HAVE_WATCHDOG
+	watchdog_start();
+#endif
+
 	status = main_loop();
 
+#ifdef HAVE_WATCHDOG
+	watchdog_stop();
+#endif
+
 	/* Shutdown properly. */
 
 end: