c# udp client-server echo program
c#, sockets
Solution
I was able to get this working by making the client talk directly to the server instead of broadcasting:
var serverAddress = "127.0.0.1"; // Server is on the local machine
IPAddress address = IPAddress.Parse(serverAddress);
...unless I'm missing an important reason why you were using broadcast in your original code?
Problem
I just started socket programming in c#. I wanted to develop a simple client-server echo application. The problem I encountered is when i try to echo the message back to the client, it does not receive it. I spent a lot of time searching for solution on variety of forums but i couldn't find any 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(" S E R V E R IS S T A R T E D "); 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 } } ``` Client: ``` 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 } ```