/// <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);
}
private void OnRecv(IAsyncResult ar)
{
try
{
IPEndPoint remoteEndPoint = null;
byte[] cache = udpClient.EndReceive(ar, ref remoteEndPoint);
//Debug.LogError("udp recv:" + cache.Length);
// 长度小于KCP.IKCP_OVERHEAD，不是kcp消息
if (cache.Length < KCP.IKCP_OVERHEAD)
{
udpClient.BeginReceive(OnRecv, null);
return;
}
uint conv = 0;
KCP.ikcp_decode32u(cache, 0, ref conv);
lock (syncRoot)
{
if (!channels.TryGetValue(conv, out KChannel channel))
{
//Debug.LogError("recv:" + remoteEndPoint);
channel = new KChannel(conv, udpClient, remoteEndPoint)
{
Name = "Server",
OnReadCallback = this.OnReadCallback,
OnErrorCallback = this.OnErrorCallback
};
channels.Add(conv, channel);
}
channel.HandleRecv(cache);
}
udpClient.BeginReceive(OnRecv, null);
}
catch (Exception e)
{
Debug.LogWarning(e);
if (udpClient != null)
{
//异常引发可能是远端强制关闭,服务端需继续拉起接收
udpClient.BeginReceive(OnRecv, null);
}
}
}