UO Protocol Packet Help

[Gr3enP0ison]

Hello guys,

long time no see. I already posted this on original RunUO forums but this seems really dead to me and I hope that you guys can help me with my problem.
Actually I am currently analysing the RunUO Core and the UO Protocol in network related points. So I try to learn from RunUO for example to implement the network technology simultaneously for other areas. Also, I've already studied the UO Protocol.
I am right now in the test phase and playing around sending some packets (self written c# socket client) against the core etc. But there came up a little problem. For example in my understanding I will need the following steps:

• connect to the server [working]
• send the seed packet (239)
  
    serverStream.Write(new byte[] {239}, 0, new byte[] { 239 }.Length);
  
  First problem: It is working and the server accepts it as Packet 239(Seed).But it seems that the first packet is getting ignored, so I have to send this seed twice.

Same with my login packet:

• connect to the server [working]
• creating login packet
  
  struct LoginPacket
          {
              public byte id;
              [MarshalAs(UnmanagedType.ByValTStr, SizeConst = 30)]
              public string name;
              [MarshalAs(UnmanagedType.ByValTStr, SizeConst = 30)]
              public string password;
              public byte next;
  
          }
  
          byte[] StructureToByteArray(object obj)
          {
              int len = Marshal.SizeOf(obj);
              byte[] arr = new byte[len];
              IntPtr ptr = Marshal.AllocHGlobal(len);
              Marshal.StructureToPtr(obj, ptr, true);
              Marshal.Copy(ptr, arr, 0, len);
              Marshal.FreeHGlobal(ptr);
              return arr;
          }
• in function:
  
  LoginPacket loginpacket;
              loginpacket.id = 128;
              loginpacket.name = "testuser";
              loginpacket.password = "123456789";
              loginpacket.next = 0x00;
• sending it to the server:
  
  byte[] outStream = StructureToByteArray(loginpacket);
              serverStream.Write(outStream, 0, outStream.Length);
              serverStream.Flush();

This is working because I am debugging the variables by using Visual Studio and printing it out to console. "testuser" and "123456789" is the output. But this only works if I send it twice. I hope we can find a solution for this very specific problem.



Ty guys