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361
Esiur/Net/Sockets/WSocket.cs
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361
Esiur/Net/Sockets/WSocket.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.Net.Packets;
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using Esiur.Misc;
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using System.IO;
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using Esiur.Core;
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using Esiur.Resource;
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using Esiur.Data;
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using System.Globalization;
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namespace Esiur.Net.Sockets
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{
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public class WSocket : ISocket, INetworkReceiver<ISocket>
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{
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WebsocketPacket pkt_receive = new WebsocketPacket();
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WebsocketPacket pkt_send = new WebsocketPacket();
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ISocket sock;
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NetworkBuffer receiveNetworkBuffer = new NetworkBuffer();
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NetworkBuffer sendNetworkBuffer = new NetworkBuffer();
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object sendLock = new object();
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bool held;
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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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long totalSent, totalReceived;
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bool processing = false;
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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 IPEndPoint RemoteEndPoint
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{
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get { return 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 sock.State;
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}
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}
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public INetworkReceiver<ISocket> Receiver { get; set; }
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public WSocket(ISocket socket)
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{
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pkt_send.FIN = true;
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pkt_send.Mask = false;
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pkt_send.Opcode = WebsocketPacket.WSOpcode.BinaryFrame;
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sock = socket;
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sock.Receiver = this;
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//sock.OnClose += Sock_OnClose;
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//sock.OnConnect += Sock_OnConnect;
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//sock.OnReceive += Sock_OnReceive;
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}
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//private void Sock_OnReceive(NetworkBuffer buffer)
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//{
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//}
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//private void Sock_OnConnect()
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//{
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// OnConnect?.Invoke();
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//}
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//private void Sock_OnClose()
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//{
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// OnClose?.Invoke();
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//}
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public void Send(WebsocketPacket packet)
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{
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lock (sendLock)
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if (packet.Compose())
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sock.Send(packet.Data);
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}
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public void Send(byte[] message)
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{
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lock (sendLock)
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{
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if (held)
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{
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sendNetworkBuffer.Write(message);
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}
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else
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{
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totalSent += message.Length;
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//Console.WriteLine("TX " + message.Length +"/"+totalSent);// + " " + DC.ToHex(message, 0, (uint)size));
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pkt_send.Message = message;
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if (pkt_send.Compose())
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sock?.Send(pkt_send.Data);
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}
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}
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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 (held)
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{
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sendNetworkBuffer.Write(message, (uint)offset, (uint)size);
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}
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else
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{
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totalSent += size;
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//Console.WriteLine("TX " + size + "/"+totalSent);// + " " + DC.ToHex(message, 0, (uint)size));
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pkt_send.Message = new byte[size];
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Buffer.BlockCopy(message, offset, pkt_send.Message, 0, size);
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if (pkt_send.Compose())
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sock.Send(pkt_send.Data);
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}
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}
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}
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public void Close()
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{
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sock?.Close();
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}
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public AsyncReply<bool> Connect(string hostname, ushort port)
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{
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throw new NotImplementedException();
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}
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public bool Begin()
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{
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return sock.Begin();
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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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//OnClose = null;
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//OnConnect = null;
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//OnReceive = null;
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receiveNetworkBuffer = null;
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//sock.OnReceive -= Sock_OnReceive;
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//sock.OnClose -= Sock_OnClose;
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//sock.OnConnect -= Sock_OnConnect;
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sock.Receiver = null;
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sock = null;
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OnDestroy?.Invoke(this);
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OnDestroy = null;
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}
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public AsyncReply<ISocket> AcceptAsync()
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{
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throw new NotImplementedException();
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}
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public void Hold()
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{
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//Console.WriteLine("WS Hold ");
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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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lock (sendLock)
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{
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held = false;
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var message = sendNetworkBuffer.Read();
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//Console.WriteLine("WS Unhold {0}", message == null ? 0 : message.Length);
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if (message == null)
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return;
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totalSent += message.Length;
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pkt_send.Message = message;
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if (pkt_send.Compose())
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sock.Send(pkt_send.Data);
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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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throw new NotImplementedException();
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}
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public ISocket Accept()
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{
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throw new NotImplementedException();
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}
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public AsyncReply<bool> BeginAsync()
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{
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return sock.BeginAsync();
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}
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public void NetworkClose(ISocket sender)
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{
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Receiver?.NetworkClose(sender);
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}
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public void NetworkReceive(ISocket sender, NetworkBuffer buffer)
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{
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if (sock.State == SocketState.Closed)// || sock.State == SocketState.Terminated)
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return;
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if (buffer.Protected)
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return;
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if (processing)
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return;
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var msg = buffer.Read();
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if (msg == null)
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return;
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var wsPacketLength = pkt_receive.Parse(msg, 0, (uint)msg.Length);
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//Console.WriteLine("WSP: " + wsPacketLength);
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if (wsPacketLength < 0)
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{
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buffer.Protect(msg, 0, (uint)msg.Length + (uint)-wsPacketLength);
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return;
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}
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uint offset = 0;
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while (wsPacketLength > 0)
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{
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if (pkt_receive.Opcode == WebsocketPacket.WSOpcode.ConnectionClose)
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{
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Close();
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return;
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}
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else if (pkt_receive.Opcode == WebsocketPacket.WSOpcode.Ping)
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{
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var pkt_pong = new WebsocketPacket();
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pkt_pong.FIN = true;
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pkt_pong.Mask = false;
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pkt_pong.Opcode = WebsocketPacket.WSOpcode.Pong;
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pkt_pong.Message = pkt_receive.Message;
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offset += (uint)wsPacketLength;
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Send(pkt_pong);
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}
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else if (pkt_receive.Opcode == WebsocketPacket.WSOpcode.Pong)
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{
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offset += (uint)wsPacketLength;
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}
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else if (pkt_receive.Opcode == WebsocketPacket.WSOpcode.BinaryFrame
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|| pkt_receive.Opcode == WebsocketPacket.WSOpcode.TextFrame
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|| pkt_receive.Opcode == WebsocketPacket.WSOpcode.ContinuationFrame)
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{
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totalReceived += pkt_receive.Message.Length;
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//Console.WriteLine("RX " + pkt_receive.Message.Length + "/" + totalReceived);// + " " + DC.ToHex(message, 0, (uint)size));
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receiveNetworkBuffer.Write(pkt_receive.Message);
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offset += (uint)wsPacketLength;
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//Console.WriteLine("WS IN: " + pkt_receive.Opcode.ToString() + " " + pkt_receive.Message.Length + " | " + offset + " " + string.Join(" ", pkt_receive.Message));// DC.ToHex(pkt_receive.Message));
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}
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else
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Console.WriteLine("Unknown WS opcode:" + pkt_receive.Opcode);
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if (offset == msg.Length)
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{
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//OnReceive?.Invoke(receiveNetworkBuffer);
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Receiver?.NetworkReceive(this, receiveNetworkBuffer);
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return;
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}
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wsPacketLength = pkt_receive.Parse(msg, offset, (uint)msg.Length);
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}
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if (wsPacketLength < 0)//(offset < msg.Length) && (offset > 0))
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{
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//receiveNetworkBuffer.HoldFor(msg, offset, (uint)(msg.Length - offset), (uint)msg.Length + (uint)-wsPacketLength);
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// save the incomplete packet to the heldBuffer queue
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buffer.HoldFor(msg, offset, (uint)(msg.Length - offset), (uint)(msg.Length - offset) + (uint)-wsPacketLength);
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}
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//Console.WriteLine("WS IN: " + receiveNetworkBuffer.Available);
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//OnReceive?.Invoke(receiveNetworkBuffer);
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Receiver?.NetworkReceive(this, receiveNetworkBuffer);
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processing = false;
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if (buffer.Available > 0 && !buffer.Protected)
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Receiver?.NetworkReceive(this, buffer);
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//Sock_OnReceive(buffer);
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}
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public void NetworkConnect(ISocket sender)
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{
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Receiver?.NetworkConnect(this);
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}
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}
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}
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