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POUDP Proxy in C#? Needs a little assistance
 

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    <p>Can someone spot what I did wrong here? Seems to only create one instance of the sockets not two.</p> <pre><code>using System; using System.Collections.Generic; using System.Text; using System.Net.Sockets; using System.Net; namespace UdpProxy { class Program { public static UdpClient server = null; static void Main(string[] args) { int localPort = 7900; IPEndPoint remoteSender = new IPEndPoint(IPAddress.Any, 4001); IPAddress tempAddress; IPAddress.TryParse("OUT_GOING_IP/HOST_GOES_HERE", out tempAddress); remoteSender.Address = tempAddress; remoteSender.Port = 7900; // Display some information Console.WriteLine("Welcome! Starting Upd proxy server."); Console.WriteLine("Local port: " + localPort); Console.WriteLine("Remote ip: " + remoteSender.Address.ToString()); Console.WriteLine("Remote port: " + remoteSender.Port); Console.WriteLine("Press any key to quit."); // Create UDP client UdpClient client = new UdpClient(localPort); UdpState state = new UdpState(client, remoteSender); state.setRemote(remoteSender); // Start async receiving client.BeginReceive(new AsyncCallback(DataReceivedClient), state); // Wait for any key to terminate application Console.ReadKey(); client.Close(); } private static void DataReceivedClient(IAsyncResult ar) { UdpClient c = (UdpClient)((UdpState)ar.AsyncState).c; IPEndPoint ipEndPoint = (IPEndPoint)((UdpState)(ar.AsyncState)).e; //local ip and random port. IPEndPoint remoteIPEndPoint = (IPEndPoint)((UdpState)(ar.AsyncState)).remote; byte[] receiveBytes = c.EndReceive(ar, ref ipEndPoint); // Convert data to ASCII and print in console string receivedText = BitConverter.ToString(receiveBytes); Console.WriteLine("Client 2 Server = " + receivedText); if (server == null) { // Create UDP client server = new UdpClient(new IPEndPoint(IPAddress.Any, 0)); UdpState stateServer = new UdpState(server, remoteIPEndPoint); server.BeginReceive(new AsyncCallback(DataReceiveServer), stateServer); server.Connect(remoteIPEndPoint); } server.Send(receiveBytes, receiveBytes.Length); // Restart listening for udp data packages c.BeginReceive(new AsyncCallback(DataReceivedClient), ar.AsyncState); } private static void DataReceiveServer(IAsyncResult ar) { UdpClient c = (UdpClient)((UdpState)ar.AsyncState).c; IPEndPoint ipEndPoint = (IPEndPoint)((UdpState)(ar.AsyncState)).e; //local ip and random port. byte[] receiveBytes = c.EndReceive(ar, ref ipEndPoint); // Convert data to ASCII and print in console string receivedText = BitConverter.ToString(receiveBytes); Console.WriteLine("Server 2 Client = " + receivedText); c.Connect(ipEndPoint); c.Send(receiveBytes, receiveBytes.Length); // Restart listening for udp data packages c.BeginReceive(new AsyncCallback(DataReceiveServer), ar.AsyncState); } } } </code></pre> <p>supporting helper class</p> <pre><code>using System; using System.Collections.Generic; using System.Text; using System.Net.Sockets; using System.Net; namespace UdpProxy { /// &lt;summary&gt; /// Simple implementation of the UdpState class mentioned on /// http://msdn.microsoft.com/en-us/library/c8s04db1(v=VS.80).aspx /// &lt;/summary&gt; internal class UdpState { internal UdpState(UdpClient c, IPEndPoint e) { this.c = c; this.e = e; } internal void setRemote(IPEndPoint remote) { this.remote = remote; } internal UdpClient c; internal IPEndPoint e; internal IPEndPoint remote; } } </code></pre>
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