using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;

using System.Net.Sockets;
using System.Net;
using System.Threading;



namespace SocketLibrary.WP
{
    public class SocketClient
    {
        private Socket _socket = null;
        static ManualResetEvent clientDone = new ManualResetEvent(false);

        public Socket GetSocket
        {
            get { return _socket; }
        }

        const int TIMEOUT_MILLISECONDS = 5000;

        public string Connect(string serverName, int port, bool useTcp)
        {
            string result= string.Empty;
            //DnsEndPoint hostEntry = new DnsEndPoint(serverName, port);
            IPEndPoint hostEntry = new IPEndPoint(IPAddress.Parse(serverName), port);

            ProtocolType protocol = useTcp ? ProtocolType.Tcp : ProtocolType.Udp;
            Socket sock = new Socket(AddressFamily.InterNetwork, SocketType.Stream, protocol);

            SocketAsyncEventArgs socketEventArgs = new SocketAsyncEventArgs();
            socketEventArgs.RemoteEndPoint = hostEntry;
            socketEventArgs.UserToken = sock;
            socketEventArgs.Completed +=new EventHandler<SocketAsyncEventArgs>(delegate(object s, SocketAsyncEventArgs sae)
                {
                    _socket = sae.UserToken as Socket;
                    result = sae.SocketError.ToString();
                    clientDone.Set();
                });

            clientDone.Reset();
            sock.ConnectAsync(socketEventArgs);
            clientDone.WaitOne(TIMEOUT_MILLISECONDS);

            return result;
        }

        public void Disconnect()
        {
            _socket.Close(TIMEOUT_MILLISECONDS);
        }

        public string Send(string message)
        {
            string result = "Socket is not initialized";
            if (_socket != null)
            {
                SocketAsyncEventArgs socketEventArg = new SocketAsyncEventArgs();
                socketEventArg.RemoteEndPoint = _socket.RemoteEndPoint;
                socketEventArg.UserToken = null;
                socketEventArg.Completed += new EventHandler<SocketAsyncEventArgs>(delegate(object s, SocketAsyncEventArgs sae)
                {
                    result = sae.SocketError.ToString();
                    clientDone.Set();
                });

                byte[] payload = Encoding.UTF8.GetBytes(message + "<EOF>");
                socketEventArg.SetBuffer(payload, 0, payload.Length);

                clientDone.Reset();
                _socket.SendAsync(socketEventArg);
                clientDone.WaitOne(TIMEOUT_MILLISECONDS);
            }

            return result;
        }

        public string Receive()
        {
            string response = "Nothing ";
            if (_socket != null)
            {
                SocketAsyncEventArgs socketEventArg = new SocketAsyncEventArgs();
                socketEventArg.RemoteEndPoint = _socket.RemoteEndPoint;
                socketEventArg.UserToken = null;
                socketEventArg.SetBuffer(new Byte[64], 0, 64);
                socketEventArg.Completed += new EventHandler<SocketAsyncEventArgs>(delegate(object s, SocketAsyncEventArgs sae)
                {
                    response = Encoding.UTF8.GetString(sae.Buffer, 0, sae.BytesTransferred);
                    response = response.Replace("<EOF>", "");
                    clientDone.Set();
                });

                clientDone.Reset();
                _socket.ReceiveAsync(socketEventArg);
                clientDone.WaitOne(TIMEOUT_MILLISECONDS);
            }

            return response;
        }

    }
}



using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;

using System.Net.Sockets;
using System.Net;
using System.Threading;

namespace SocketLibrary.WP
{
    // State object for reading client data asynchronously
    public class StateObject
    {
        // Client  socket.
        public Socket workSocket = null;
        // Size of receive buffer.
        public const int BufferSize = 1024;
        // Receive buffer.
        public byte[] buffer = new byte[BufferSize];
        // Received data string.
        public StringBuilder sb = new StringBuilder();
    }

    public class SocketServer
    {
        const int TIMEOUT_MILLISECONDS = 5000;

        // Thread signal.
        public static ManualResetEvent allDone = new ManualResetEvent(false);

        public SocketServer()
        {
        }

        public void StartListening()
        {
            // Data buffer for incoming data.
            byte[] bytes = new Byte[1024];

            // Establish the local endpoint for the socket.
            // The DNS name of the computer
            // running the listener is "host.contoso.com".

            IPEndPoint localEndPoint = new IPEndPoint(IPAddress.Any, 222);

            // Create a TCP/IP socket.
            Socket listener = new Socket(AddressFamily.InterNetwork,
                SocketType.Stream, ProtocolType.Tcp);

            // Bind the socket to the local endpoint and listen for incoming connections.
            try
            {
                listener.Bind(localEndPoint);
                listener.Listen(10);

                while (true)
                {
                    // Set the event to nonsignaled state.
                    allDone.Reset();

                    // Start an asynchronous socket to listen for connections.
                    Console.WriteLine("Waiting for a connection...");
                    listener.BeginAccept(
                        new AsyncCallback(AcceptCallback),
                        listener);

                    // Wait until a connection is made before continuing.
                    allDone.WaitOne();
                }

            }
            catch (Exception e)
            {
                Console.WriteLine(e.ToString());
            }

            Console.WriteLine("\nPress ENTER to continue...");
            Console.Read();

        }

        public void AcceptCallback(IAsyncResult ar)
        {
            // Signal the main thread to continue.
            allDone.Set();

            // Get the socket that handles the client request.
            Socket listener = (Socket)ar.AsyncState;
            Socket handler = listener.EndAccept(ar);

            // Create the state object.
            StateObject state = new StateObject();
            state.workSocket = handler;
            handler.BeginReceive(state.buffer, 0, StateObject.BufferSize, 0,
                new AsyncCallback(ReadCallback), state);
        }

        public void ReadCallback(IAsyncResult ar)
        {
            String content = String.Empty;

            // Retrieve the state object and the handler socket
            // from the asynchronous state object.
            StateObject state = (StateObject)ar.AsyncState;
            Socket handler = state.workSocket;

            // Read data from the client socket.
            int bytesRead = handler.EndReceive(ar);

            if (bytesRead > 0)
            {
                // There  might be more data, so store the data received so far.
                state.sb.Append(Encoding.UTF8.GetString(
                    state.buffer, 0, bytesRead));

                // Check for end-of-file tag. If it is not there, read
                // more data.
                content = state.sb.ToString();
                if (content.IndexOf("<EOF>") > -1)
                {
                    // All the data has been read from the
                    // client. Display it on the console.
                    Console.WriteLine("Read {0} bytes from socket. \n Data : {1}",
                        content.Length, content);
                    // Echo the data back to the client.
                    Send(handler, content);
                }
                else
                {
                    // Not all data received. Get more.
                    handler.BeginReceive(state.buffer, 0, StateObject.BufferSize, 0,
                    new AsyncCallback(ReadCallback), state);
                }
            }
        }

        private void Send(Socket handler, String data)
        {
            data = String.Format("You Sent: '{0}'", data);
            //data = data.Replace("<EOF>", "");
            // data = GameLogic.Play(data);
            // Convert the string data to byte data using ASCII encoding.
            byte[] byteData = Encoding.UTF8.GetBytes(data);

            // Begin sending the data to the remote device.
            handler.BeginSend(byteData, 0, byteData.Length, 0,
                new AsyncCallback(SendCallback), handler);
        }

        private void SendCallback(IAsyncResult ar)
        {
            try
            {
                // Retrieve the socket from the state object.
                Socket handler = (Socket)ar.AsyncState;

                // Complete sending the data to the remote device.
                int bytesSent = handler.EndSend(ar);
                Console.WriteLine("Sent {0} bytes to client.", bytesSent);

                handler.Shutdown(SocketShutdown.Both);
                handler.Close();

            }
            catch (Exception e)
            {
                Console.WriteLine(e.ToString());
            }
        }

    }
}