Don't process unless connected, and only fire loopback messages back up the loopback

tunnel/listener.go

@@ -41,6 +41,8 @@ func (t *tunListener) process() {
 					id: m.id,
 					// the session id
 					session: m.session,
+					// is loopback conn
+					loopback: m.loopback,
 					// close chan
 					closed: make(chan bool),
 					// recv called by the acceptor