427 lines
9.6 KiB
C#
427 lines
9.6 KiB
C#
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using System;
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using System.Collections.Concurrent;
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using System.Collections.Generic;
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using System.IO;
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using System.Net;
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using System.Net.Sockets;
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using System.Runtime.InteropServices;
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namespace ET
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{
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public struct KcpWaitPacket
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{
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public long ActorId;
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public MemoryStream MemoryStream;
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}
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public class KChannel : AChannel
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{
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public KService Service;
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// 保存所有的channel
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public static readonly Dictionary<uint, KChannel> kChannels = new Dictionary<uint, KChannel>();
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public static readonly ConcurrentDictionary<long, ulong> idLocalRemoteConn = new ConcurrentDictionary<long, ulong>();
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private Socket socket;
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private IntPtr kcp;
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private readonly Queue<KcpWaitPacket> sendBuffer = new Queue<KcpWaitPacket>();
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private uint lastRecvTime;
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public readonly uint CreateTime;
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public uint LocalConn { get; set; }
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public uint RemoteConn { get; set; }
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private readonly byte[] sendCache = new byte[1024 * 1024];
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public bool IsConnected { get; private set; }
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public string RealAddress { get; set; }
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private void InitKcp()
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{
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switch (this.Service.ServiceType)
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{
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case ServiceType.Inner:
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Kcp.KcpNodelay(kcp, 1, 10, 2, 1);
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Kcp.KcpWndsize(kcp, 1024 * 100, 1024 * 100);
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Kcp.KcpSetmtu(kcp, 1400); // 默认1400
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Kcp.KcpSetminrto(kcp, 10);
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break;
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case ServiceType.Outer:
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Kcp.KcpNodelay(kcp, 1, 10, 2, 1);
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Kcp.KcpWndsize(kcp, 128, 128);
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Kcp.KcpSetmtu(kcp, 470);
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Kcp.KcpSetminrto(kcp, 10);
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break;
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}
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}
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// connect
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public KChannel(long id, uint localConn, Socket socket, IPEndPoint remoteEndPoint, KService kService)
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{
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this.LocalConn = localConn;
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if (kChannels.ContainsKey(this.LocalConn))
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{
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throw new Exception($"channel create error: {this.LocalConn} {remoteEndPoint} {this.ChannelType}");
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}
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this.Id = id;
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this.ChannelType = ChannelType.Connect;
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Log.Info($"channel create: {this.Id} {this.LocalConn} {remoteEndPoint} {this.ChannelType}");
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this.Service = kService;
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this.RemoteAddress = remoteEndPoint;
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this.socket = socket;
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this.kcp = Kcp.KcpCreate(this.RemoteConn, (IntPtr) this.LocalConn);
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kChannels.Add(this.LocalConn, this);
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this.lastRecvTime = kService.TimeNow;
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this.CreateTime = kService.TimeNow;
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this.Connect();
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}
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// accept
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public KChannel(long id, uint localConn, uint remoteConn, Socket socket, IPEndPoint remoteEndPoint, KService kService)
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{
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if (kChannels.ContainsKey(this.LocalConn))
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{
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throw new Exception($"channel create error: {localConn} {remoteEndPoint} {this.ChannelType}");
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}
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this.Id = id;
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this.ChannelType = ChannelType.Accept;
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Log.Info($"channel create: {this.Id} {localConn} {remoteConn} {remoteEndPoint} {this.ChannelType}");
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this.Service = kService;
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this.LocalConn = localConn;
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this.RemoteConn = remoteConn;
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this.RemoteAddress = remoteEndPoint;
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this.socket = socket;
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this.kcp = Kcp.KcpCreate(this.RemoteConn, (IntPtr) localConn);
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kChannels.Add(this.LocalConn, this);
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this.lastRecvTime = kService.TimeNow;
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this.CreateTime = kService.TimeNow;
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this.InitKcp();
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}
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#region 网络线程
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public override void Dispose()
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{
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if (this.IsDisposed)
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{
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return;
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}
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uint localConn = this.LocalConn;
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uint remoteConn = this.RemoteConn;
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Log.Info($"channel dispose: {this.Id} {localConn} {remoteConn}");
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kChannels.Remove(localConn);
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idLocalRemoteConn.TryRemove(this.Id, out ulong _);
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long id = this.Id;
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this.Id = 0;
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this.Service.Remove(id);
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try
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{
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//this.Service.Disconnect(localConn, remoteConn, this.Error, this.RemoteAddress, 3);
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}
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catch (Exception e)
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{
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Log.Error(e);
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}
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if (this.kcp != IntPtr.Zero)
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{
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Kcp.KcpRelease(this.kcp);
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this.kcp = IntPtr.Zero;
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}
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this.socket = null;
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}
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public void HandleConnnect()
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{
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// 如果连接上了就不用处理了
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if (this.IsConnected)
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{
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return;
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}
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this.kcp = Kcp.KcpCreate(this.RemoteConn, new IntPtr(this.LocalConn));
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this.InitKcp();
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ulong localRmoteConn = ((ulong) this.RemoteConn << 32) | this.LocalConn;
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idLocalRemoteConn.TryAdd(this.Id, localRmoteConn);
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Log.Info($"channel connected: {this.Id} {this.LocalConn} {this.RemoteConn} {this.RemoteAddress}");
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this.IsConnected = true;
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this.lastRecvTime = this.Service.TimeNow;
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while (true)
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{
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if (this.sendBuffer.Count <= 0)
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{
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break;
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}
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KcpWaitPacket buffer = this.sendBuffer.Dequeue();
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this.KcpSend(buffer);
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}
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}
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/// <summary>
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/// 发送请求连接消息
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/// </summary>
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private void Connect()
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{
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try
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{
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uint timeNow = this.Service.TimeNow;
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this.lastRecvTime = timeNow;
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byte[] buffer = sendCache;
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buffer.WriteTo(0, KcpProtocalType.SYN);
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buffer.WriteTo(1, this.LocalConn);
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buffer.WriteTo(5, this.RemoteConn);
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this.socket.SendTo(buffer, 0, 9, SocketFlags.None, this.RemoteAddress);
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Log.Info($"kchannel connect {this.Id} {this.LocalConn} {this.RemoteConn} {this.RealAddress} {this.socket.LocalEndPoint}");
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// 200毫秒后再次update发送connect请求
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this.Service.AddToUpdateNextTime(timeNow + 300, this.Id);
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}
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catch (Exception e)
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{
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Log.Error(e);
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this.OnError(ErrorCode.ERR_SocketCantSend);
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}
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}
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public void Update()
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{
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if (this.IsDisposed)
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{
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return;
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}
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uint timeNow = this.Service.TimeNow;
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// 如果还没连接上，发送连接请求
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if (!this.IsConnected)
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{
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// 20秒没连接上则报错
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if (timeNow - this.CreateTime > 10 * 1000)
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{
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Log.Error($"kChannel connect timeout: {this.Id} {this.RemoteConn} {timeNow} {this.CreateTime} {this.ChannelType} {this.RemoteAddress}");
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this.OnError(ErrorCode.ERR_KcpConnectTimeout);
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return;
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}
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switch (ChannelType)
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{
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case ChannelType.Connect:
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this.Connect();
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break;
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}
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return;
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}
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try
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{
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Kcp.KcpUpdate(this.kcp, timeNow);
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}
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catch (Exception e)
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{
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Log.Error(e);
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this.OnError(ErrorCode.ERR_SocketError);
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return;
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}
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if (this.kcp != IntPtr.Zero)
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{
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uint nextUpdateTime = Kcp.KcpCheck(this.kcp, timeNow);
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this.Service.AddToUpdateNextTime(nextUpdateTime, this.Id);
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}
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}
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public void HandleRecv(byte[] date, int offset, int length)
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{
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if (this.IsDisposed)
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{
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return;
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}
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this.IsConnected = true;
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Kcp.KcpInput(this.kcp, date, offset, length);
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this.Service.AddToUpdateNextTime(0, this.Id);
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while (true)
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{
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if (this.IsDisposed)
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{
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break;
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}
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int n = Kcp.KcpPeeksize(this.kcp);
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if (n < 0)
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{
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break;
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}
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if (n == 0)
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{
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this.OnError((int)SocketError.NetworkReset);
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break;
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}
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MemoryStream ms = MessageSerializeHelper.GetStream(n);
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ms.SetLength(n);
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ms.Seek(0, SeekOrigin.Begin);
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byte[] buffer = ms.GetBuffer();
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int count = Kcp.KcpRecv(this.kcp, buffer, n);
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if (n != count)
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{
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break;
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}
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switch (this.Service.ServiceType)
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{
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case ServiceType.Inner:
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ms.Seek(Packet.ActorIdLength + Packet.OpcodeLength, SeekOrigin.Begin);
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break;
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case ServiceType.Outer:
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ms.Seek(Packet.OpcodeLength, SeekOrigin.Begin);
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break;
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}
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this.lastRecvTime = this.Service.TimeNow;
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this.OnRead(ms);
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}
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}
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public void Output(IntPtr bytes, int count)
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{
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if (this.IsDisposed)
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{
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return;
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}
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try
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{
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// 没连接上 kcp不往外发消息, 其实本来没连接上不会调用update，这里只是做一层保护
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if (!this.IsConnected)
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{
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return;
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}
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if (count == 0)
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{
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Log.Error($"output 0");
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return;
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}
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byte[] buffer = this.sendCache;
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buffer.WriteTo(0, KcpProtocalType.MSG);
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// 每个消息头部写下该channel的id;
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buffer.WriteTo(1, this.LocalConn);
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Marshal.Copy(bytes, buffer, 5, count);
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this.socket.SendTo(buffer, 0, count + 5, SocketFlags.None, this.RemoteAddress);
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}
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catch (Exception e)
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{
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Log.Error(e);
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this.OnError(ErrorCode.ERR_SocketCantSend);
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}
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}
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private void KcpSend(KcpWaitPacket kcpWaitPacket)
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{
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if (this.IsDisposed)
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{
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return;
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}
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MemoryStream memoryStream = kcpWaitPacket.MemoryStream;
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if (this.Service.ServiceType == ServiceType.Inner)
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{
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memoryStream.GetBuffer().WriteTo(0, kcpWaitPacket.ActorId);
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}
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int count = (int) (memoryStream.Length - memoryStream.Position);
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Kcp.KcpSend(this.kcp, memoryStream.GetBuffer(), (int)memoryStream.Position, count);
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this.Service.AddToUpdateNextTime(0, this.Id);
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}
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public void Send(long actorId, MemoryStream stream)
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{
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if (this.kcp != IntPtr.Zero)
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{
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// 检查等待发送的消息，如果超出最大等待大小，应该断开连接
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int n = Kcp.KcpWaitsnd(this.kcp);
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int maxWaitSize = 0;
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switch (this.Service.ServiceType)
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{
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|
case ServiceType.Inner:
|
|||
|
|
maxWaitSize = Kcp.InnerMaxWaitSize;
|
|||
|
|
break;
|
|||
|
|
case ServiceType.Outer:
|
|||
|
|
maxWaitSize = Kcp.OuterMaxWaitSize;
|
|||
|
|
break;
|
|||
|
|
default:
|
|||
|
|
throw new ArgumentOutOfRangeException();
|
|||
|
|
}
|
|||
|
|
|
|||
|
|
if (n > maxWaitSize)
|
|||
|
|
{
|
|||
|
|
Log.Error($"kcp wait snd too large: {n}: {this.Id} {this.RemoteConn}");
|
|||
|
|
this.OnError(ErrorCode.ERR_KcpWaitSendSizeTooLarge);
|
|||
|
|
return;
|
|||
|
|
}
|
|||
|
|
}
|
|||
|
|
|
|||
|
|
KcpWaitPacket kcpWaitPacket = new KcpWaitPacket() { ActorId = actorId, MemoryStream = stream };
|
|||
|
|
if (!this.IsConnected)
|
|||
|
|
{
|
|||
|
|
this.sendBuffer.Enqueue(kcpWaitPacket);
|
|||
|
|
return;
|
|||
|
|
}
|
|||
|
|
this.KcpSend(kcpWaitPacket);
|
|||
|
|
}
|
|||
|
|
|
|||
|
|
private void OnRead(MemoryStream memoryStream)
|
|||
|
|
{
|
|||
|
|
this.Service.OnRead(this.Id, memoryStream);
|
|||
|
|
}
|
|||
|
|
|
|||
|
|
public void OnError(int error)
|
|||
|
|
{
|
|||
|
|
long channelId = this.Id;
|
|||
|
|
this.Service.Remove(channelId);
|
|||
|
|
this.Service.OnError(channelId, error);
|
|||
|
|
}
|
|||
|
|
|
|||
|
|
#endregion
|
|||
|
|
}
|
|||
|
|
}
|