public void AddConnection(AleTunnel item)
{
lock (_tunnels.SyncRoot)
{
if (!_tunnels.Contains(item))
{
_tunnels.Add(item);
}
}
}
void IAleTunnelObserver.OnAleFrameArrival(AleTunnel theConnection, AleFrame theFrame)
{
try
{
lock (_stateInputEventSyncLock)
{
if (CheckFrame(theFrame))
{
// D类服务时，序列号有效；A类服务时，序列号无效。
if (_rsspEndPoint.ServiceType == ServiceType.D &&
theFrame.FrameType == AleFrameType.DataTransmission)
{
_seqNoManager.UpdateAckSeq(theFrame.SequenceNo);
}
//
if (theFrame.FrameType == AleFrameType.ConnectionRequest)
{
LogUtility.Info(string.Format("{0}: Received a CR frame on tcp connection(LEP={1}, REP={2}).",
this.RsspEP.ID, theConnection.LocalEndPoint, theConnection.RemoteEndPoint));
theConnection.Observer = this;
_currentState.HandleConnectionRequestFrame(theConnection, theFrame);
}
else if (theFrame.FrameType == AleFrameType.ConnectionConfirm)
{
LogUtility.Info(string.Format("{0}: Received a CC frame on tcp connection(LEP={1}, REP={2})).",
this.RsspEP.ID, theConnection.LocalEndPoint, theConnection.RemoteEndPoint));
_currentState.HandleConnectionConfirmFrame(theConnection, theFrame);
}
else if (theFrame.FrameType == AleFrameType.Disconnect)
{
_currentState.HandleDiFrame(theConnection, theFrame);
}
else if (theFrame.FrameType == AleFrameType.DataTransmission)
{
_currentState.HandleDataTransmissionFrame(theConnection, theFrame);
}
}
else if (_seqNoManager.IsBeyondRange(theFrame.SequenceNo))
{
throw new Exception(string.Format("检测到丢包，当前确认序号={0}，收到的发送序号={1}，TCP ID = {2}",
_seqNoManager.AckSeq, theFrame.SequenceNo, theConnection.ID));
}
}
}
catch (System.Exception ex)
{
LogUtility.Error(string.Format("ALE: {0} : {1}", _rsspEndPoint.ID, ex));
theConnection.Disconnect();
}
}
public void RemoveCloseConnection(AleTunnel theConnection)
{
if (theConnection.IsHandShaken)
{
this.DescreaseValidConnection();
theConnection.IsHandShaken = false;
}
_tunnels.Remove(theConnection);
theConnection.Close();
}
protected override void HandleTunnelDisconnected(AleTunnel theConnection, string reason)
{
try
{
// 服务器端，移除并关闭此连接。
this.RemoveCloseConnection(theConnection);
}
catch (System.Exception ex)
{
LogUtility.Error(ex.ToString());
}
}
protected override void HandleTunnelDisconnected(AleTunnel theConnection, string reason)
{
try
{
// 客户端：减少有效的连接个数。
if (theConnection.IsHandShaken)
{
this.DescreaseValidConnection();
theConnection.IsHandShaken = false;
}
}
catch (System.Exception ex)
{
LogUtility.Error(ex.ToString());
}
}
void IAleTunnelObserver.OnTcpDisconnected(AleTunnel theConnection, string reason)
{
try
{
LogUtility.Info(string.Format("{0}: A TCP Connection disconnected. LEP = {1}, REP = {2}",
this.RsspEP.ID, theConnection.LocalEndPoint, theConnection.RemoteEndPoint));
this.HandleTunnelDisconnected(theConnection, reason);
// 通知观察器连接关闭。
var args = new TcpDisconnectedEventArgs(theConnection.ID,
_rsspEndPoint.LocalID, theConnection.LocalEndPoint,
_rsspEndPoint.RemoteID, theConnection.RemoteEndPoint);
_tunnelEventNotifier.NotifyTcpDisconnected(args);
}
catch (System.Exception ex)
{
LogUtility.Error(ex.ToString());
}
}
protected abstract void HandleTunnelDisconnected(AleTunnel theConnection, string reason);
public bool ContainsTunnel(AleTunnel tunnel)
{
return(_tunnels.Contains(tunnel));
}