5 files changed, 449 insertions, 0 deletions

diff --git a/OpenSim/Region/ClientStack/TCPJSONStream/ClientAcceptedEventArgs.cs b/OpenSim/Region/ClientStack/TCPJSONStream/ClientAcceptedEventArgs.cs
new file mode 100644
index 0000000..a58eab1
--- /dev/null
+++ b/OpenSim/Region/ClientStack/TCPJSONStream/ClientAcceptedEventArgs.cs
@@ -0,0 +1,50 @@
+using System;
+using System.Net.Sockets;
+
+namespace OpenSim.Region.ClientStack.TCPJSONStream
+{
+    /// <summary>
+    /// Invoked when a client have been accepted by the <see cref="HttpListener"/>
+    /// </summary>
+    /// <remarks>
+    /// Can be used to revoke incoming connections
+    /// </remarks>
+    public class ClientAcceptedEventArgs : EventArgs
+    {
+        private readonly Socket _socket;
+        private bool _revoke;
+
+        /// <summary>
+        /// Initializes a new instance of the <see cref="ClientAcceptedEventArgs"/> class.
+        /// </summary>
+        /// <param name="socket">The socket.</param>
+        public ClientAcceptedEventArgs(Socket socket)
+        {
+            _socket = socket;
+        }
+
+        /// <summary>
+        /// Accepted socket.
+        /// </summary>
+        public Socket Socket
+        {
+            get { return _socket; }
+        }
+
+        /// <summary>
+        /// Client should be revoked.
+        /// </summary>
+        public bool Revoked
+        {
+            get { return _revoke; }
+        }
+
+        /// <summary>
+        /// Client may not be handled.
+        /// </summary>
+        public void Revoke()
+        {
+            _revoke = true;
+        }
+    }
+}
\ No newline at end of file
diff --git a/OpenSim/Region/ClientStack/TCPJSONStream/ClientNetworkContext.cs b/OpenSim/Region/ClientStack/TCPJSONStream/ClientNetworkContext.cs
new file mode 100644
index 0000000..b077b6a
--- /dev/null
+++ b/OpenSim/Region/ClientStack/TCPJSONStream/ClientNetworkContext.cs
@@ -0,0 +1,146 @@
+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;
+                }
+
+            }
+            catch (Exception)
+            {
+            }
+        }
+        /// <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
+    }
+    
+
+}
diff --git a/OpenSim/Region/ClientStack/TCPJSONStream/DisconnectedEventArgs.cs b/OpenSim/Region/ClientStack/TCPJSONStream/DisconnectedEventArgs.cs
new file mode 100644
index 0000000..32880cc
--- /dev/null
+++ b/OpenSim/Region/ClientStack/TCPJSONStream/DisconnectedEventArgs.cs
@@ -0,0 +1,17 @@
+using System;
+using System.Collections.Generic;
+using System.Linq;
+using System.Net.Sockets;
+using System.Text;
+
+namespace OpenSim.Region.ClientStack.TCPJSONStream
+{
+    public class DisconnectedEventArgs:EventArgs
+    {
+        public SocketError Error { get; private set; }
+        public DisconnectedEventArgs(SocketError err)
+        {
+            Error = err;
+        }
+    }
+}
diff --git a/OpenSim/Region/ClientStack/TCPJSONStream/OpenSimWebSocketBase.cs b/OpenSim/Region/ClientStack/TCPJSONStream/OpenSimWebSocketBase.cs
new file mode 100644
index 0000000..379438d
--- /dev/null
+++ b/OpenSim/Region/ClientStack/TCPJSONStream/OpenSimWebSocketBase.cs
@@ -0,0 +1,73 @@
+/*
+ * Copyright (c) Contributors, http://opensimulator.org/
+ * See CONTRIBUTORS.TXT for a full list of copyright holders.
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions are met:
+ *     * Redistributions of source code must retain the above copyright
+ *       notice, this list of conditions and the following disclaimer.
+ *     * Redistributions in binary form must reproduce the above copyright
+ *       notice, this list of conditions and the following disclaimer in the
+ *       documentation and/or other materials provided with the distribution.
+ *     * Neither the name of the OpenSimulator Project nor the
+ *       names of its contributors may be used to endorse or promote products
+ *       derived from this software without specific prior written permission.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE DEVELOPERS ``AS IS'' AND ANY
+ * EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED
+ * WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
+ * DISCLAIMED. IN NO EVENT SHALL THE CONTRIBUTORS BE LIABLE FOR ANY
+ * DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES
+ * (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
+ * LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND
+ * ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
+ * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS
+ * SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+ */
+
+using System;
+using System.Net;
+using Nini.Config;
+using OpenSim.Framework;
+
+namespace OpenSim.Region.ClientStack.TCPJSONStream
+{
+    public sealed class TCPJsonWebSocketBase : IClientNetworkServer
+    {
+        private TCPJsonWebSocketServer m_tcpServer;
+
+        public TCPJsonWebSocketBase()
+        {
+        }
+
+        public void Initialise(IPAddress _listenIP, ref uint port, int proxyPortOffsetParm, bool allow_alternate_port, IConfigSource configSource, AgentCircuitManager authenticateClass)
+        {
+            m_tcpServer = new TCPJsonWebSocketServer(_listenIP,ref port, proxyPortOffsetParm, allow_alternate_port,configSource,authenticateClass);
+        }
+
+        public void NetworkStop()
+        {
+            m_tcpServer.Stop();
+        }
+
+        public bool HandlesRegion(Location x)
+        {
+            return m_tcpServer.HandlesRegion(x);
+        }
+
+        public void AddScene(IScene x)
+        {
+            m_tcpServer.AddScene(x);
+        }
+
+        public void Start()
+        {
+            m_tcpServer.Start();
+        }
+
+        public void Stop()
+        {
+            m_tcpServer.Stop();
+        }
+    }
+}
\ No newline at end of file
diff --git a/OpenSim/Region/ClientStack/TCPJSONStream/TCPJsonWebSocketServer.cs b/OpenSim/Region/ClientStack/TCPJSONStream/TCPJsonWebSocketServer.cs
new file mode 100644
index 0000000..c0f6792
--- /dev/null
+++ b/OpenSim/Region/ClientStack/TCPJSONStream/TCPJsonWebSocketServer.cs
@@ -0,0 +1,163 @@
+using System;
+using System.Collections.Generic;
+using System.Net;
+using System.Net.Sockets;
+using System.Reflection;
+using System.Text;
+using System.Threading;
+using Nini.Config;
+using OpenSim.Framework;
+using OpenSim.Region.Framework.Scenes;
+using log4net;
+
+namespace OpenSim.Region.ClientStack.TCPJSONStream
+{
+    public delegate void ExceptionHandler(object source, Exception exception);
+
+    public class TCPJsonWebSocketServer
+    {
+        private readonly IPAddress _address;
+        private readonly int _port;
+        private readonly ManualResetEvent _shutdownEvent = new ManualResetEvent(false);
+        private TcpListener _listener;
+        private int _pendingAccepts;
+        private bool _shutdown;
+        private int _backlogAcceptQueueLength = 5;
+        private Scene m_scene;
+        private Location m_location;
+        private static readonly ILog m_log = LogManager.GetLogger(MethodBase.GetCurrentMethod().DeclaringType);
+
+        public event EventHandler<ClientAcceptedEventArgs> Accepted = delegate { };
+
+
+        public TCPJsonWebSocketServer(IPAddress _listenIP, ref uint port, int proxyPortOffsetParm,
+                                      bool allow_alternate_port, IConfigSource configSource,
+                                      AgentCircuitManager authenticateClass)
+        {
+            _address = _listenIP;
+            _port = (int)port;  //Why is a uint passed in?
+        }
+        public void Stop()
+        {
+            _shutdown = true;
+            _listener.Stop();
+            if (!_shutdownEvent.WaitOne())
+                m_log.Error("[WEBSOCKETSERVER]: Failed to shutdown listener properly.");
+            _listener = null;
+        }
+
+        public bool HandlesRegion(Location x)
+        {
+            return x == m_location;
+        }
+
+        public void AddScene(IScene scene)
+        {
+            if (m_scene != null)
+            {
+                m_log.Debug("[WEBSOCKETSERVER]: AddScene() called but I already have a scene.");
+                return;
+            }
+            if (!(scene is Scene))
+            {
+                m_log.Error("[WEBSOCKETSERVER]: AddScene() called with an unrecognized scene type " + scene.GetType());
+                return;
+            }
+
+            m_scene = (Scene)scene;
+            m_location = new Location(m_scene.RegionInfo.RegionHandle);
+        }
+
+        public void Start()
+        {
+            _listener = new TcpListener(_address, _port);
+            _listener.Start(_backlogAcceptQueueLength);
+            Interlocked.Increment(ref _pendingAccepts);
+            _listener.BeginAcceptSocket(OnAccept, null);
+        }
+
+        private void OnAccept(IAsyncResult ar)
+        {
+            bool beginAcceptCalled = false;
+            try
+            {
+                int count = Interlocked.Decrement(ref _pendingAccepts);
+                if (_shutdown)
+                {
+                    if (count == 0)
+                        _shutdownEvent.Set();
+                    return;
+                }
+                Interlocked.Increment(ref _pendingAccepts);
+                _listener.BeginAcceptSocket(OnAccept, null);
+                beginAcceptCalled = true;
+                Socket socket = _listener.EndAcceptSocket(ar);
+                if (!OnAcceptingSocket(socket))
+                {
+                    socket.Disconnect(true);
+                    return;
+                }
+                ClientNetworkContext context = new ClientNetworkContext((IPEndPoint) socket.RemoteEndPoint, _port,
+                                                                        new NetworkStream(socket), 16384, socket);
+                //HttpRequestParser parser;
+                context.BeginRead();
+
+            }
+            catch (Exception err)
+            {
+                if (ExceptionThrown == null)
+#if DEBUG
+                    throw;
+#else
+                   _logWriter.Write(this, LogPrio.Fatal, err.Message);
+                // we can't really do anything but close the connection
+#endif
+                if (ExceptionThrown != null)
+                    ExceptionThrown(this, err);
+
+                if (!beginAcceptCalled)
+                    RetryBeginAccept();
+
+            }
+        }
+
+        private void RetryBeginAccept()
+        {
+            try
+            {
+                
+                _listener.BeginAcceptSocket(OnAccept, null);
+            }
+            catch (Exception err)
+            {
+                
+                if (ExceptionThrown == null)
+#if DEBUG
+                    throw;
+#else
+                // we can't really do anything but close the connection
+#endif
+                if (ExceptionThrown != null)
+                    ExceptionThrown(this, err);
+            }
+        }
+
+        private bool OnAcceptingSocket(Socket sock)
+        {
+            ClientAcceptedEventArgs args = new ClientAcceptedEventArgs(sock);
+            Accepted(this, args);
+            return !args.Revoked;
+        }
+        /// <summary>
+        /// Catch exceptions not handled by the listener.
+        /// </summary>
+        /// <remarks>
+        /// Exceptions will be thrown during debug mode if this event is not used,
+        /// exceptions will be printed to console and suppressed during release mode.
+        /// </remarks>
+        public event ExceptionHandler ExceptionThrown = delegate { };
+
+        
+
+    }
+}