TCP connections: Only listen to localhost, not all interfaces

scenes/main.gd

@@ -20,7 +20,8 @@ var _hint_client_connection
 
 func _ready():
 	_hint_server = TCP_Server.new()
-	_hint_server.listen(1235)
+	_hint_server.listen(1235, "127.0.0.1")
+	OS.set_environment("HINT_TCP_PORT", "1235")
 
 	var args = helpers.parse_args()
 

scenes/shell.gd

@@ -109,7 +109,7 @@ func _shell_binary():
 #func run_async_thread(command):
 #	var port = 1000 + (randi() % 1000)
 #	var s = TCP_Server.new()
-#	s.listen(port)
+#	s.listen(port, "127.0.0.1")
 #	var _pid = OS.execute("ncat", ["127.0.0.1", str(port), "-c", command], false, [], true)
 #	while not s.is_connection_available():
 #		pass

scenes/tcp_server.gd

@@ -13,7 +13,7 @@ func _ready():
 	start()
 
 func start():
-	_s.listen(port)
+	_s.listen(port, "127.0.0.1")
 
 func _process(_delta):
 	if _s.is_connection_available():

scenes/tcp_server_shell.gd

@@ -13,7 +13,7 @@ func _ready():
 	start()
 
 func start():
-	_s.listen(port)
+	_s.listen(port, "127.0.0.1")
 
 func _process(_delta):
 	if _s.is_connection_available():

scenes/text_editor.gd

@@ -10,7 +10,7 @@ var _client_connection
 func _ready():
 	# Initialize TCP server for fake editor.
 	_server = TCP_Server.new()
-	_server.listen(1234)
+	_server.listen(1234, "127.0.0.1")
 
 func _process(_delta):
 	if _server.is_connection_available():

scripts/hint

@@ -3,7 +3,7 @@
 use IO::Socket;
 
 $socket = IO::Socket::INET->new(PeerAddr => "127.0.0.1",
-                                PeerPort => 1235,
+                                PeerPort => $ENV{HINT_TCP_PORT},
                                 Proto    => "tcp",
                                 Type     => SOCK_STREAM);