X-Git-Url: https://www.tinc-vpn.org/git/browse?a=blobdiff_plain;f=src%2Fcontrol.c;h=1f562134d4f7517d8e2c8a1dd71a3a1817758844;hb=b180c1af99c559809d0e7b23fce3022817ec56a9;hp=ad2a7256f0213521da9483cac05992cb7d85056d;hpb=12e68b95e6a84582a016492a467d0a16337a3c4b;p=tinc

diff --git a/src/control.c b/src/control.c
index ad2a7256..1f562134 100644
--- a/src/control.c
+++ b/src/control.c
@@ -137,17 +137,16 @@ bool init_control(void) {
 	randomize(controlcookie, sizeof controlcookie / 2);
 	bin2hex(controlcookie, controlcookie, sizeof controlcookie / 2);
 
+	mode_t mask = umask(0);
+	umask(mask | 077);
 	FILE *f = fopen(pidfilename, "w");
+	umask(mask);
+
 	if(!f) {
 		logger(DEBUG_ALWAYS, LOG_ERR, "Cannot write control socket cookie file %s: %s", pidfilename, strerror(errno));
 		return false;
 	}
 
-#ifdef HAVE_FCHMOD
-	fchmod(fileno(f), 0600);
-#else
-	chmod(pidfilename, 0600);
-#endif
 	// Get the address and port of the first listening socket
 
 	char *localhost = NULL;
@@ -176,9 +175,49 @@ bool init_control(void) {
 	free(localhost);
 	fclose(f);
 
+#ifndef HAVE_MINGW
+	int unix_fd = socket(AF_UNIX, SOCK_STREAM, 0);
+	if(unix_fd < 0) {
+		logger(DEBUG_ALWAYS, LOG_ERR, "Could not create UNIX socket: %s", sockstrerror(errno));
+		return false;
+	}
+
+	struct sockaddr_un sun;
+	sun.sun_family = AF_UNIX;
+	strncpy(sun.sun_path, unixsocketname, sizeof sun.sun_path);
+
+	if(connect(unix_fd, (struct sockaddr *)&sun, sizeof sun) >= 0) {
+		logger(DEBUG_ALWAYS, LOG_ERR, "UNIX socket %s is still in use!", unixsocketname);
+		return false;
+	}
+
+	unlink(unixsocketname);
+
+	umask(mask | 077);
+	int result = bind(unix_fd, (struct sockaddr *)&sun, sizeof sun);
+	umask(mask);
+
+	if(result < 0) {
+		logger(DEBUG_ALWAYS, LOG_ERR, "Could not bind UNIX socket to %s: %s", unixsocketname, sockstrerror(errno));
+		return false;
+	}
+
+	if(listen(unix_fd, 3) < 0) {
+		logger(DEBUG_ALWAYS, LOG_ERR, "Could not listen on UNIX socket %s: %s", unixsocketname, sockstrerror(errno));
+		return false;
+	}
+
+	io_add(&unix_socket, handle_new_unix_connection, &unix_socket, unix_fd, IO_READ);
+#endif
+
 	return true;
 }
 
 void exit_control(void) {
+#ifndef HAVE_MINGW
+	io_del(&unix_socket);
+	close(unix_socket.fd);
+#endif
+
 	unlink(pidfilename);
 }