X-Git-Url: https://www.tinc-vpn.org/git/browse?a=blobdiff_plain;f=src%2Ftincd.c;h=1c9b6ed6d04535ad7d440b0e3aa6169f8d9f92d1;hb=9235256116574927657a93944ef1b21e255e771b;hp=5bfeeabb364cbe68b32b919d86520a0ff18c2088;hpb=e62fd508158749a0d55eae06c2e361df5d6da6e0;p=tinc

diff --git a/src/tincd.c b/src/tincd.c
index 5bfeeabb..1c9b6ed6 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"
@@ -152,10 +155,20 @@ 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";
+		        "Report bugs to tinc@tinc-vpn.org.\n",
+		        program_name);
+	}
+}
 
-		printf(message, program_name);
+// Try to resolve path to absolute, return a copy of the argument if this fails.
+static char *get_path_arg(char *arg) {
+	char *result = absolute_path(arg);
+
+	if(!result) {
+		result = xstrdup(arg);
 	}
+
+	return result;
 }
 
 static bool parse_options(int argc, char **argv) {
@@ -174,8 +187,9 @@ static bool parse_options(int argc, char **argv) {
 			goto exit_fail;
 
 		case OPT_CONFIG_FILE:
+			assert(optarg);
 			free(confbase);
-			confbase = xstrdup(optarg);
+			confbase = get_path_arg(optarg);
 			break;
 
 		case OPT_NO_DETACH:
@@ -205,6 +219,7 @@ static bool parse_options(int argc, char **argv) {
 			break;
 
 		case OPT_NETNAME:
+			assert(optarg);
 			free(netname);
 			netname = xstrdup(optarg);
 			break;
@@ -263,14 +278,15 @@ static bool parse_options(int argc, char **argv) {
 
 			if(optarg) {
 				free(logfilename);
-				logfilename = xstrdup(optarg);
+				logfilename = get_path_arg(optarg);
 			}
 
 			break;
 
 		case OPT_PIDFILE:
+			assert(optarg);
 			free(pidfilename);
-			pidfilename = xstrdup(optarg);
+			pidfilename = get_path_arg(optarg);
 			break;
 
 		default:
@@ -312,6 +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;
@@ -362,8 +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
@@ -408,7 +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
@@ -438,6 +495,9 @@ int main(int argc, char **argv) {
 #ifdef HAVE_MINIUPNPC
 		        " miniupnpc"
 #endif
+#ifdef HAVE_SANDBOX
+		        " sandbox"
+#endif
 #ifdef ENABLE_UML
 		        " uml"
 #endif
@@ -450,9 +510,8 @@ 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;
 	}
 
@@ -521,6 +580,10 @@ int main(int argc, char **argv) {
 		return 1;
 	}
 
+	if(!read_sandbox_level()) {
+		return 1;
+	}
+
 	if(debug_level == DEBUG_NOTHING) {
 		int level = 0;
 
@@ -635,8 +698,16 @@ 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: