/source/library/Interlace/ReactorCore/StreamSocketServerConnector.cs

#region Using Directives and Copyright Notice



// Copyright (c) 2007-2010, Computer Consultancy Pty Ltd

// All rights reserved.

// 

// 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 Computer Consultancy Pty Ltd 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 COPYRIGHT HOLDERS AND CONTRIBUTORS "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 COMPUTER CONSULTANCY PTY LTD 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.Collections.Generic;

using System.Net;

using System.Net.Sockets;

using System.Text;



using Interlace.Utilities;



#endregion



namespace Interlace.ReactorCore

{

    class StreamSocketServerConnector

    {

        Socket _socket = null;

        Reactor _reactor;

        IProtocolFactory _factory = null;

        bool _closing = false;



        public StreamSocketServerConnector(Reactor reactor)

        {

            _reactor = reactor;

        }



        public void Listen(IProtocolFactory factory)

        {

            Listen(factory, 0, IPAddress.Any);

        }



        public void Listen(IProtocolFactory factory, int port)

        {

            Listen(factory, port, IPAddress.Any);

        }



        public void Listen(IProtocolFactory factory, int port, IPAddress address)

        {

            if (_socket != null) throw new InvalidOperationException("The connector is already listening.");

            _socket = new Socket(AddressFamily.InterNetwork, SocketType.Stream, ProtocolType.Tcp);

            _factory = factory;



            _socket.Bind(new IPEndPoint(address, port));

            _socket.Listen(5);



            StartAccepting();

        }



        public IPAddress ListeningOnAddress

        {

            get

            {

                IPEndPoint ipEndpoint = _socket.LocalEndPoint as IPEndPoint;



                if (ipEndpoint != null)

                {

                    return ipEndpoint.Address;

                }

                else

                {

                    return null;

                }

            }

        }



        public int ListeningOnPort

        {

            get

            {

                IPEndPoint ipEndpoint = _socket.LocalEndPoint as IPEndPoint;



                if (ipEndpoint != null)

                {

                    return ipEndpoint.Port;

                }

                else

                {

                    return 0;

                }

            }

        }



        void StartAccepting()

        {

            if (!_closing)

            {

                IAsyncResult result = _socket.BeginAccept(null, null);



                _reactor.AddResult(result, AcceptCompleted);

            }

        }



        void AcceptCompleted(IAsyncResult result, object state)

        {

            Socket newSocket;

            

            try

            {

                newSocket = _socket.EndAccept(result);

            }

            catch (SocketException)

            {

                if (_closing) return;



                throw;

            }

            catch (ObjectDisposedException)

            {

                if (_closing) return;



                throw;

            }



            Protocol protocol = _factory.BuildProtocol();



            SocketConnection connection = new StreamSocketConnection(_reactor, protocol);

            connection.StartConnection(newSocket, protocol.ReceiveBufferSize);

            protocol.MakeConnection(connection);



            StartAccepting();

        }



        public void Close()

        {

            _closing = true;



            _socket.Close();

        }

    }

}