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555
Esiur/Net/Sockets/SSLSocket.cs
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555
Esiur/Net/Sockets/SSLSocket.cs
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/*
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Copyright (c) 2017 Ahmed Kh. Zamil
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Permission is hereby granted, free of charge, to any person obtaining a copy
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of this software and associated documentation files (the "Software"), to deal
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in the Software without restriction, including without limitation the rights
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to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
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copies of the Software, and to permit persons to whom the Software is
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furnished to do so, subject to the following conditions:
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The above copyright notice and this permission notice shall be included in all
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copies or substantial portions of the Software.
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THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
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IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
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FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
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AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
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LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
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OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
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SOFTWARE.
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*/
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using System;
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using System.Collections.Generic;
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using System.Linq;
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using System.Text;
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using System.Net.Sockets;
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using System.Net;
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using Esiur.Misc;
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using Esiur.Core;
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using System.Threading;
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using System.Net.Security;
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using System.Security.Cryptography.X509Certificates;
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using Esiur.Resource;
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using System.Threading.Tasks;
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using Esiur.Data;
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namespace Esiur.Net.Sockets
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{
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public class SSLSocket : ISocket
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{
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public INetworkReceiver<ISocket> Receiver { get; set; }
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Socket sock;
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byte[] receiveBuffer;
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bool held;
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//ArraySegment<byte> receiveBufferSegment;
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NetworkBuffer receiveNetworkBuffer = new NetworkBuffer();
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readonly object sendLock = new object();
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Queue<KeyValuePair<AsyncReply<bool>, byte[]>> sendBufferQueue = new Queue<KeyValuePair<AsyncReply<bool>, byte[]>>();// Queue<byte[]>();
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bool asyncSending;
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bool began = false;
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SocketState state = SocketState.Initial;
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//public event ISocketReceiveEvent OnReceive;
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//public event ISocketConnectEvent OnConnect;
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//public event ISocketCloseEvent OnClose;
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public event DestroyedEvent OnDestroy;
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SslStream ssl;
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X509Certificate2 cert;
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bool server;
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string hostname;
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public async AsyncReply<bool> Connect(string hostname, ushort port)
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{
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var rt = new AsyncReply<bool>();
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this.hostname = hostname;
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this.server = false;
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state = SocketState.Connecting;
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await sock.ConnectAsync(hostname, port);
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try
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{
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await BeginAsync();
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state = SocketState.Established;
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//OnConnect?.Invoke();
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Receiver?.NetworkConnect(this);
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}
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catch (Exception ex)
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{
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state = SocketState.Closed;// .Terminated;
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Close();
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Global.Log(ex);
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}
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return true;
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}
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//private void DataSent(Task task)
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//{
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// try
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// {
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// if (sendBufferQueue.Count > 0)
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// {
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// byte[] data = sendBufferQueue.Dequeue();
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// lock (sendLock)
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// ssl.WriteAsync(data, 0, data.Length).ContinueWith(DataSent);
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// }
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// else
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// {
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// asyncSending = false;
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// }
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// }
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// catch (Exception ex)
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// {
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// if (state != SocketState.Closed && !sock.Connected)
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// {
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// state = SocketState.Terminated;
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// Close();
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// }
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// asyncSending = false;
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// Global.Log("SSLSocket", LogType.Error, ex.ToString());
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// }
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//}
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private void SendCallback(IAsyncResult ar)
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{
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if (ar != null)
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{
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try
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{
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ssl.EndWrite(ar);
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if (ar.AsyncState != null)
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((AsyncReply<bool>)ar.AsyncState).Trigger(true);
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}
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catch
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{
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if (state != SocketState.Closed && !sock.Connected)
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{
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//state = SocketState.Closed;//.Terminated;
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Close();
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}
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}
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}
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lock (sendLock)
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{
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if (sendBufferQueue.Count > 0)
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{
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var kv = sendBufferQueue.Dequeue();
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try
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{
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ssl.BeginWrite(kv.Value, 0, kv.Value.Length, SendCallback, kv.Key);
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}
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catch (Exception ex)
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{
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asyncSending = false;
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try
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{
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if (kv.Key != null)
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kv.Key.Trigger(false);
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if (state != SocketState.Closed && !sock.Connected)
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{
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//state = SocketState.Terminated;
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Close();
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}
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}
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catch (Exception ex2)
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{
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//state = SocketState.Closed;// .Terminated;
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Close();
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}
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//Global.Log("TCPSocket", LogType.Error, ex.ToString());
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}
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}
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else
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{
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asyncSending = false;
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}
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}
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}
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public IPEndPoint LocalEndPoint
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{
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get { return (IPEndPoint)sock.LocalEndPoint; }
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}
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public SSLSocket()
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{
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sock = new Socket(AddressFamily.InterNetwork,
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SocketType.Stream,
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ProtocolType.Tcp);
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receiveBuffer = new byte[sock.ReceiveBufferSize];
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}
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public SSLSocket(IPEndPoint localEndPoint, X509Certificate2 certificate)
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{
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// create the socket
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sock = new Socket(AddressFamily.InterNetwork,
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SocketType.Stream,
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ProtocolType.Tcp);
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state = SocketState.Listening;
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// bind
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sock.Bind(localEndPoint);
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// start listening
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sock.Listen(UInt16.MaxValue);
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cert = certificate;
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}
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public IPEndPoint RemoteEndPoint
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{
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get { return (IPEndPoint)sock.RemoteEndPoint; }
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}
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public SocketState State
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{
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get
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{
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return state;
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}
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}
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public SSLSocket(Socket socket, X509Certificate2 certificate, bool authenticateAsServer)
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{
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cert = certificate;
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sock = socket;
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receiveBuffer = new byte[sock.ReceiveBufferSize];
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ssl = new SslStream(new NetworkStream(sock));
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server = authenticateAsServer;
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if (socket.Connected)
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state = SocketState.Established;
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}
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public void Close()
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{
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if (state != SocketState.Closed)// && state != SocketState.Terminated)
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{
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state = SocketState.Closed;
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if (sock.Connected)
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{
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try
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{
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sock.Shutdown(SocketShutdown.Both);
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}
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catch
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{
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//state = SocketState.Terminated;
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}
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}
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Receiver?.NetworkClose(this);
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//OnClose?.Invoke();
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}
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}
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public void Send(byte[] message)
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{
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Send(message, 0, message.Length);
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}
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public void Send(byte[] message, int offset, int size)
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{
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var msg = message.Clip((uint)offset, (uint)size);
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lock (sendLock)
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{
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if (!sock.Connected)
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return;
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if (asyncSending || held)
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{
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sendBufferQueue.Enqueue(new KeyValuePair<AsyncReply<bool>, byte[]>(null, msg));// message.Clip((uint)offset, (uint)size));
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}
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else
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{
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asyncSending = true;
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try
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{
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ssl.BeginWrite(msg, 0, msg.Length, SendCallback, null);
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}
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catch
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{
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asyncSending = false;
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//state = SocketState.Terminated;
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Close();
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}
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}
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}
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}
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//public void Send(byte[] message)
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//{
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// Send(message, 0, message.Length);
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//}
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//public void Send(byte[] message, int offset, int size)
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//{
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// lock (sendLock)
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// {
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// if (asyncSending)
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// {
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// sendBufferQueue.Enqueue(message.Clip((uint)offset, (uint)size));
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// }
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// else
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// {
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// asyncSending = true;
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// ssl.WriteAsync(message, offset, size).ContinueWith(DataSent);
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// }
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// }
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//}
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//private void DataReceived(Task<int> task)
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//{
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// try
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// {
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// if (state == SocketState.Closed || state == SocketState.Terminated)
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// return;
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// if (task.Result <= 0)
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// {
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// Close();
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// return;
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// }
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// receiveNetworkBuffer.Write(receiveBuffer, 0, (uint)task.Result);
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// OnReceive?.Invoke(receiveNetworkBuffer);
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// if (state == SocketState.Established)
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// ssl.ReadAsync(receiveBuffer, 0, receiveBuffer.Length).ContinueWith(DataReceived);
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// }
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// catch (Exception ex)
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// {
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// if (state != SocketState.Closed && !sock.Connected)
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// {
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// state = SocketState.Terminated;
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// Close();
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// }
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// Global.Log("SSLSocket", LogType.Error, ex.ToString());
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// }
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//}
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public bool Begin()
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{
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if (began)
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return false;
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began = true;
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if (server)
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ssl.AuthenticateAsServer(cert);
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else
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ssl.AuthenticateAsClient(hostname);
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if (state == SocketState.Established)
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{
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ssl.BeginRead(receiveBuffer, 0, receiveBuffer.Length, ReceiveCallback, this);
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return true;
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}
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else
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return false;
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}
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public async AsyncReply<bool> BeginAsync()
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{
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if (began)
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return false;
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began = true;
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if (server)
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await ssl.AuthenticateAsServerAsync(cert);
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else
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await ssl.AuthenticateAsClientAsync(hostname);
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if (state == SocketState.Established)
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{
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ssl.BeginRead(receiveBuffer, 0, receiveBuffer.Length, ReceiveCallback, this);
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return true;
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}
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else
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return false;
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}
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private void ReceiveCallback(IAsyncResult results)
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{
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try
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{
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if (state != SocketState.Established)
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return;
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var bytesReceived = ssl.EndRead(results);
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if (bytesReceived <= 0)
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{
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Close();
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return;
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}
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receiveNetworkBuffer.Write(receiveBuffer, 0, (uint)bytesReceived);
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//OnReceive?.Invoke(receiveNetworkBuffer);
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Receiver?.NetworkReceive(this, receiveNetworkBuffer);
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ssl.BeginRead(receiveBuffer, 0, receiveBuffer.Length, ReceiveCallback, this);
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}
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catch (Exception ex)
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{
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if (state != SocketState.Closed && !sock.Connected)
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{
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//state = SocketState.Terminated;
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Close();
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}
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//Global.Log("SSLSocket", LogType.Error, ex.ToString());
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}
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}
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public bool Trigger(ResourceTrigger trigger)
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{
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return true;
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}
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public void Destroy()
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{
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Close();
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Receiver = null;
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receiveNetworkBuffer = null;
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OnDestroy?.Invoke(this);
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OnDestroy = null;
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}
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public async AsyncReply<ISocket> AcceptAsync()
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{
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try
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{
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var s = await sock.AcceptAsync();
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return new SSLSocket(s, cert, true);
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}
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catch
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{
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state = SocketState.Closed;// Terminated;
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return null;
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}
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}
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public void Hold()
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{
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held = true;
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}
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public void Unhold()
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{
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try
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{
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SendCallback(null);
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}
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catch (Exception ex)
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{
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Global.Log(ex);
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}
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finally
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{
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held = false;
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}
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}
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public AsyncReply<bool> SendAsync(byte[] message, int offset, int length)
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{
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var msg = message.Clip((uint)offset, (uint)length);
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lock (sendLock)
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{
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if (!sock.Connected)
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return new AsyncReply<bool>(false);
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var rt = new AsyncReply<bool>();
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if (asyncSending || held)
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{
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sendBufferQueue.Enqueue(new KeyValuePair<AsyncReply<bool>, byte[]>(rt, msg));
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}
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else
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{
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asyncSending = true;
|
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try
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{
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ssl.BeginWrite(msg, 0, msg.Length, SendCallback, rt);// null);
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}
|
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catch (Exception ex)
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{
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rt.TriggerError(ex);
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asyncSending = false;
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//state = SocketState.Terminated;
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Close();
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}
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}
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return rt;
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}
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}
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|
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|
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public ISocket Accept()
|
||||
{
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try
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{
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return new SSLSocket(sock.Accept(), cert, true);
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}
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catch
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{
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state = SocketState.Closed;// .Terminated;
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return null;
|
||||
}
|
||||
}
|
||||
}
|
||||
}
|
||||
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