commit:

UdPunching.ExampleW/ExampleForm.cs

@@ -168,8 +168,14 @@ namespace UdPunching.ExampleW
                         case ExchangeMessageId.KeepAliveAckNoChg:
                             break;
 
+                        case ExchangeMessageId.PeerKnockReqAckRelay:
+                            break;
+
+                        case ExchangeMessageId.PeerKnockReqDeniedRelay:
+                            break;
+
                         default:
-                            throw new ArgumentOutOfRangeException();
+                            throw new ArgumentOutOfRangeException("msg.Id", "no excepted message from server:" + msg.Id);
                     }
                 }
             }
@@ -182,7 +188,8 @@ namespace UdPunching.ExampleW
 
                 Invoke(new Action(() =>
                 {
-                    Log($"RECV FROM {_saeRecv.RemoteEndPoint},{Encoding.UTF8.GetString(_saeRecv.Buffer, 0, _saeRecv.BytesTransferred)}");
+                    //TODO: decode message by peer public key
+                    //Log($"RECV FROM {_saeRecv.RemoteEndPoint},{Encoding.UTF8.GetString(_saeRecv.Buffer, 0, _saeRecv.BytesTransferred)}");
                 }));
             }
         }
@@ -198,7 +205,6 @@ namespace UdPunching.ExampleW
                 catch (Exception exception)
                 {
                     Log($"ERROR ProcessPacket:{exception}");
-                    Invoke(new Action(() => { StopButton_Click(null, null); }));
                 }
             }
             else