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Question by Nynex96 · Oct 10, 2020 at 11:10 PM · c#networkingudppythontransport

How can I read data sent using the Transport API with python server

Currently I'm just playing around trying to create my own custom server using python. Right now I haven't accomplished much but I'm having issues reading the data I send over.

I'm using just the sample code from https://docs.unity3d.com/Packages/com.unity.transport@0.4/manual/samples/clientbehaviour.cs.html with a slight modification to the NetworkEvent.Type.Connect if statement.

ORIGINAL

     if (cmd == NetworkEvent.Type.Connect)
     {
         Debug.Log("We are now connected to the server");

         uint value = 1;
         var writer = m_Driver.BeginSend(m_Connection);
         writer.WriteUInt(value);
         m_Driver.EndSend(writer);
     }

ALTERED

 if (cmd == NetworkEvent.Type.Connect)
             {
                 Debug.Log("We are now connected to the server");
 
                 uint value = 1;
                 var writer = m_Driver.BeginSend(m_Connection);
                 //
                 string message = "hello";
                 writer.WriteBytes(stringToNativeArray(message));
                 
                 m_Driver.EndSend(writer);
             }

When I send the hello message my python server receives this

b'\x00\x00\xee\xda'

I'm confused as to what this is. I have very limited knowledge of networking and the transport layer but any help would be appreciated. (from an actual answer to additional online resources to help accomplish this task)

The simple UDP Python server

 import socket
 import sys
 import ctypes
 import json
 from ast import literal_eval
 
 sock = socket.socket(socket.AF_INET, socket.SOCK_DGRAM)
 
 server_address = ('localhost', 9000)
 sock.bind(server_address)
 
 while True:
     print('\nwaiting to receive message')
     data, address = sock.recvfrom(4096)
 
     if data:
         print(data)
         sent = sock.sendto(bytes(ctypes.c_ulong(500)), address)
         print('sent to ' + str(address))


Ignore the useless imports, I've been trying various things.

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