C # udp client-server echo program

Question

I just started programming sockets in C #. I wanted to develop a simple client-server echo application. The problem I encountered is when I try to return a message to the client back, it does not receive it. I spent a lot of time finding solutions in various forums, but I could not find anyone that would help me with my problem.

Thanks in advance. Andrew

Here is the code:

Server:

static void Main(string[] args) { string data = ""; UdpClient server = new UdpClient(8008); IPEndPoint remoteIPEndPoint = new IPEndPoint(IPAddress.Any, 0); Console.WriteLine(" SERVER IS STARTED "); Console.WriteLine("* Waiting for Client..."); while (data != "q") { byte[] receivedBytes = server.Receive(ref remoteIPEndPoint); data = Encoding.ASCII.GetString(receivedBytes); Console.WriteLine("Handling client at " + remoteIPEndPoint + " - "); Console.WriteLine("Message Received " + data.TrimEnd()); server.Send(receivedBytes, receivedBytes.Length,remoteIPEndPoint); Console.WriteLine("Message Echoed to" + remoteIPEndPoint + data); } Console.WriteLine("Press Enter Program Finished"); Console.ReadLine(); //delay end of program server.Close(); //close the connection } } 

Customer:

  static void Main(string[] args) { string data = ""; byte[] sendBytes = new Byte[1024]; byte[] rcvPacket = new Byte[1024]; UdpClient client = new UdpClient(); IPAddress address = IPAddress.Parse(IPAddress.Broadcast.ToString()); client.Connect(address, 8008); IPEndPoint remoteIPEndPoint = new IPEndPoint(IPAddress.Any, 0); Console.WriteLine("Client is Started"); Console.WriteLine("Type your message"); while (data != "q") { data = Console.ReadLine(); sendBytes = Encoding.ASCII.GetBytes(DateTime.Now.ToString() + " " + data); client.Send(sendBytes, sendBytes.GetLength(0)); rcvPacket = client.Receive(ref remoteIPEndPoint); string rcvData = Encoding.ASCII.GetString(rcvPacket); Console.WriteLine("Handling client at " + remoteIPEndPoint + " - "); Console.WriteLine("Message Received: " + rcvPacket.ToString()); } Console.WriteLine("Close Port Command Sent"); //user feedback Console.ReadLine(); client.Close(); //close connection } 

Answer 1

I managed to get this working, forcing the client to talk directly to the server, and not to notify:

 var serverAddress = "127.0.0.1"; // Server is on the local machine IPAddress address = IPAddress.Parse(serverAddress); 

... if I miss the important reason why you used translation in your source code?