show error for unknown packets

src/common/client.rs

@@ -70,6 +70,7 @@ impl<S, R, E> Client<S, R, E> where
     fn send(&mut self, pkt: S) {
         println!("[send] {:?}", pkt);
         let buf = pkt.as_bytes();
+        println!("[send: buf] {:?}", buf);
         let mut cbuf = self.cipher_out.encrypt(&buf).unwrap();
         self.send_buffer.append(&mut cbuf);
         self.send_data();
@@ -107,6 +108,7 @@ impl<S, R, E> Client<S, R, E> where
                                 Err(err) => {
                                     match err {
                                         PacketNetworkError::ClientDisconnected => self.running = false,
+                                        PacketNetworkError::PacketParseError(err) => println!("undef pkt {:?}: {:?}", self.socket, err),
                                         _ => {} //println!("error recv-ing packet with {:?}: {:?}", self.socket, err),
                                     }
                                     break;