/// <summary>
/// KCP信道
/// </summary>
/// <param name="conv">会话id</param>
/// <param name="udpClient">下层协议</param>
/// <param name="remoteEndPoint">远程端点</param>
public KChannel(uint conv, UdpClient udpClient, IPEndPoint remoteEndPoint)
{
this.conv = conv;
this.udpClient = udpClient;
this.remoteEndPoint = remoteEndPoint;
this.createTime = (uint)SystemTime.ClientNow();
kcp = new KCP(conv, KcpOutput);
kcp.NoDelay(1, 10, 1, 1);
kcp.WndSize(256, 256);
kcp.SetMtu(470);
}
/// <summary>
/// 处理接收到的数据
/// </summary>
/// <param name="cache"> 接收到的数据</param>
public void HandleRecv(byte[] cache)
{
if (this.disposed)
{
return;
}
kcp.Input(cache);
while (true)
{
try
{
if (this.disposed)
{
return;
}
int size = kcp.PeekSize();
if (size < 0)
{
return;
}
if (size == 0)
{
//发生错误，应该断开
this.OnError((ErrorCode)SocketError.NetworkReset);
this.Dispose();
return;
}
if (!isConnected)
{
this.isConnected = true;
}
var buffer = new byte[size];
kcp.Recv(buffer);
this.lastRecvTime = (uint)SystemTime.ClientNow();
this.OnRead(buffer);
}
catch (Exception e)
{
Debug.LogError(e);
}
}
}
public void Update()
{
if (disposed)
{
return;
}
uint timeNow = (uint)SystemTime.ClientNow();
try
{
kcp.Update(timeNow);
}
catch (Exception)
{
//网络无法访问
this.OnError(ErrorCode.ERR_SocketError);
return;
}
if (!isConnected)
{
// 没连接上则报错
if (timeNow - this.createTime > 3 * 1000)
{
this.OnError(ErrorCode.ERR_KcpCantConnect);
this.Dispose();
return;
}
}
else
{
//因是异步接收，lastRecvTime有可能比timeNow刷新慢。
if (timeNow < this.lastRecvTime)
{
return;
}
// 超时断开连接
if ((timeNow - this.lastRecvTime) > 10 * 1000)
{
Debug.LogError($"{Name} timeNow:{timeNow} lastRecvTime:{lastRecvTime} ts:{(timeNow - this.lastRecvTime)}");
this.OnError(ErrorCode.ERR_KcpChannelTimeout);
this.Dispose();
return;
}
}
}
