add CtosMessage_ExternalAddress

Assets/SibylSystem/MonoHelpers/TcpHelper.cs

@@ -44,6 +44,7 @@ public static class TcpHelper
                     networkStream = tcpClient.GetStream();
                     var t = new Thread(receiver);
                     t.Start();
+                    CtosMessage_ExternalAddress(ipString);
                     CtosMessage_PlayerInfo(name);
                     CtosMessage_JoinGame(pswString, version);
                 }
@@ -310,6 +311,15 @@ public static class TcpHelper
         Send(message);
     }
 
+    public static void CtosMessage_ExternalAddress(string hostname)
+    {
+        var message = new Package();
+        message.Fuction = (int) CtosMessage.ExternalAddress;
+        message.Data.writer.Write((UInt32)0);
+        message.Data.writer.WriteUnicode(hostname, hostname.Length + 1);
+        Send(message);
+    }
+
     public static void CtosMessage_PlayerInfo(string name)
     {
         var message = new Package();

Assets/YGOSharp/Enums/CtosMessage.cs

@@ -13,6 +13,7 @@
         Surrender = 0x14,
         TimeConfirm = 0x15,
         Chat = 0x16,
+        ExternalAddress = 0x17,
         HsToDuelist = 0x20,
         HsToObserver = 0x21,
         HsReady = 0x22,