/// <summary>
/// process EXP event (see spec. p 13)
/// </summary>
protected void processEXPEvent()
{
try
{
if (session.getSocket() == null)
{
return;
}
UDTSender sender = session.getSocket().getSender();
//put all the unacknowledged packets in the senders loss list
sender.putUnacknowledgedPacketsIntoLossList();
if (expCount > 16 && (long)ts.TotalMilliseconds - sessionUpSince > IDLE_TIMEOUT)
{
if (!connectionExpiryDisabled && !stopped)
{
sendShutdown();
stop();
Log.Write(this.ToString(), "Session " + session + " expired.");
return;
}
}
if (!sender.haveLostPackets())
{
sendKeepAlive();
}
expCount++;
}
catch (Exception exc)
{
Log.Write(this.ToString(), exc);
}
}
public UDTSocket Accept()
{
try
{
if (!started)
{
this.endpoint.start(true);//启动监听
this.started = true;
}
while (!shutdown)
{
UDTSession session = endpoint.accept();
if (session != null)
{
//等待握手完成
while (!session.isReady() || session.getSocket() == null)
{
Thread.Sleep(100);
}
return(session.getSocket());
}
Thread.Sleep(400);
}
return(null);
}
catch (Exception exc)
{
Log.Write(this.ToString(), "listens and blocks until a new client connects and returns a valid {@link UDTSocket} for the new connection", exc);
return(null);
}
}
/// <summary>
/// receive a packet from server from the peer
/// 从对等服务器接收数据包
/// </summary>
/// <param name="p"></param>
public void receive(UDTPacket p)
{
try
{
if (p is Acknowledgement)
{
Acknowledgement acknowledgement = (Acknowledgement)p;
onAcknowledge(acknowledgement);
}
else if (p is NegativeAcknowledgement)
{
NegativeAcknowledgement nak = (NegativeAcknowledgement)p;
onNAKPacketReceived(nak);
}
else if (p is KeepAlive)
{
session.getSocket().getReceiver().resetEXPCount();
}
else if (p is DataPacket)
{
////返回的确认数据包
////DataPacketAnswer Answer = (DataPacketAnswer)p;
//if (largestSentSequenceNumber == (int)p.getPacketSequenceNumber())
//{
// sendQueueStart.CountDown();
//}
}
}
catch (Exception ex)
{
Log.Write(this.ToString(), ex);
}
}
public void setAckInterval(long ackInterval)
{
this.ackInterval = ackInterval;
if (session.getSocket() != null && session.getSocket().getReceiver() != null)
{
session.getSocket().getReceiver().setAckInterval(ackInterval);
}
}