Commit 1 in of this branch feature. This is one of many...

OpenSim/Region/ClientStack/TCPJSONStream/ClientNetworkContext.cs

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+using System;
+using System.Collections.Generic;
+using System.IO;
+using System.Net;
+using System.Net.Sockets;
+using System.Text;
+
+namespace OpenSim.Region.ClientStack.TCPJSONStream
+{
+    public class ClientNetworkContext
+    {
+        private Socket _socket;
+        private string  _remoteAddress;
+        private string _remotePort;
+        private WebSocketConnectionStage _wsConnectionStatus = WebSocketConnectionStage.Accept;
+        private int _bytesLeft;
+        private NetworkStream _stream;
+        private byte[] _buffer;
+        public event EventHandler<DisconnectedEventArgs> Disconnected = delegate { };
+
+        public ClientNetworkContext(IPEndPoint endPoint, int port, Stream stream, int buffersize, Socket sock)
+        {
+            _socket = sock;
+            _remoteAddress = endPoint.Address.ToString();
+            _remotePort = port.ToString();
+            _stream = stream as NetworkStream;
+            _buffer = new byte[buffersize];
+            
+
+        }
+
+        public void BeginRead()
+        {
+            _wsConnectionStatus = WebSocketConnectionStage.Http;
+            try
+            {
+                _stream.BeginRead(_buffer, 0, _buffer.Length, OnReceive, _wsConnectionStatus);
+            }
+            catch (IOException err)
+            {
+                //m_log.Debug(err.ToString());
+            }
+        }
+
+        private void OnReceive(IAsyncResult ar)
+        {
+            try
+            {
+                int bytesRead = _stream.EndRead(ar);
+                if (bytesRead == 0)
+                {
+
+                    Disconnected(this, new DisconnectedEventArgs(SocketError.ConnectionReset));
+                    return;
+                }
+
+            }
+        }
+        /// <summary>
+        /// send a whole buffer
+        /// </summary>
+        /// <param name="buffer">buffer to send</param>
+        /// <exception cref="ArgumentNullException"></exception>
+        public void Send(byte[] buffer)
+        {
+            if (buffer == null)
+                throw new ArgumentNullException("buffer");
+            Send(buffer, 0, buffer.Length);
+        }
+
+        /// <summary>
+        /// Send data using the stream
+        /// </summary>
+        /// <param name="buffer">Contains data to send</param>
+        /// <param name="offset">Start position in buffer</param>
+        /// <param name="size">number of bytes to send</param>
+        /// <exception cref="ArgumentNullException"></exception>
+        /// <exception cref="ArgumentOutOfRangeException"></exception>
+        public void Send(byte[] buffer, int offset, int size)
+        {
+
+            if (offset + size > buffer.Length)
+                throw new ArgumentOutOfRangeException("offset", offset, "offset + size is beyond end of buffer.");
+
+            if (_stream != null && _stream.CanWrite)
+            {
+                try
+                {
+                    _stream.Write(buffer, offset, size);
+                }
+                catch (IOException)
+                {
+
+                }
+            }
+
+        }
+        private void Reset()
+        {
+            if (_stream == null)
+                return;
+            _stream.Dispose();
+            _stream = null;
+            if (_socket == null)
+                return;
+            if (_socket.Connected)
+                _socket.Disconnect(true);
+            _socket = null;
+        }
+    }
+
+    public enum WebSocketConnectionStage
+    {
+        Reuse,
+        Accept,
+        Http,
+        WebSocket, 
+        Closed
+    }
+
+    public enum FrameOpCodesRFC6455
+    {
+        Continue = 0x0,
+        Text = 0x1,
+        Binary = 0x2,
+        Close = 0x8,
+        Ping = 0x9,
+        Pong = 0xA
+    }
+
+    public enum DataState
+    {
+        Empty = 0,
+        Waiting = 1,
+        Receiving = 2, 
+        Complete  = 3,
+        Closed = 4,
+        Ping = 5,
+        Pong = 6
+    }
+    
+
+}