public UDTSession(String description, Destination destination)
{
Random ro = new Random((int)DateTime.Now.Ticks & 0x0000FFFF);
nextSocketID = ro.Next(0, 5000) + 20;
statistics = new UDTStatistics(description);
mySocketID = Interlocked.Increment(ref nextSocketID);
this.destination = destination;
//this.dgPacket=new DatagramPacket(new byte[0],0,destination.getAddress(),destination.getPort());
//this.dgPacket = new byte[0];
this.dgPacket = new IPEndPoint(destination.getAddress(), destination.getPort());
//UDTCongestionControl _CongestionControl = new UDTCongestionControl();
//String clazzP=_CongestionControl.ToString();
Object ccObject = null;
//try
//{
// Class<?>clazz=Class.forName(clazzP);
// ccObject=clazz.getDeclaredConstructor(UDTSession.class).newInstance(this);
//}
//catch(Exception e)
//{
// Log.Write(this.ToString(),"WARNING","Can't setup congestion control class <"+clazzP+">, using default.",e);
// ccObject = new UDTCongestionControl(this);
//}
ccObject = new UDTCongestionControl(this);
cc = (CongestionControl)ccObject;
Log.Write(this.ToString(), "Using " + cc.ToString());
}
internal static extern int ZnWriteExt(
IntPtr /*zn_session_t*/ rustSession,
ResKey.NativeType zResKey,
IntPtr payload,
uint len,
uint encoding,
uint kind,
CongestionControl congestion);
protected void onAcknowledge(Acknowledgement acknowledgement)
{
try
{
waitForAckLatch.Get().CountDown();
waitForSeqAckLatch.Get().CountDown();
CongestionControl cc = session.getCongestionControl();
long rtt = acknowledgement.getRoundTripTime();
if (rtt > 0)
{
long rttVar = acknowledgement.getRoundTripTimeVar();
cc.setRTT(rtt, rttVar);
statistics.setRTT(rtt, rttVar);
}
long rate = acknowledgement.getPacketReceiveRate();
if (rate > 0)
{
long linkCapacity = acknowledgement.getEstimatedLinkCapacity();
cc.updatePacketArrivalRate(rate, linkCapacity);
statistics.setPacketArrivalRate(cc.getPacketArrivalRate(), cc.getEstimatedLinkCapacity());
}
long ackNumber = acknowledgement.getAckNumber();
cc.onACK(ackNumber);
statistics.setCongestionWindowSize((long)cc.getCongestionWindowSize());
//need to remove all sequence numbers up the ack number from the sendBuffer
bool removed = false;
for (long s = lastAckSequenceNumber; s < ackNumber; s++)
{
lock (sendLock)
{
removed = sendBuffer.Remove(s);
}
if (removed)
{
unacknowledged.DecrementAndGet();
}
}
lastAckSequenceNumber = (int)Math.Max(lastAckSequenceNumber, ackNumber);
//send ACK2 packet to the receiver
sendAck2(ackNumber);
statistics.incNumberOfACKReceived();
if (storeStatistics)
{
statistics.storeParameters();
}
}
catch (Exception ex)
{
Log.Write(this.ToString(), ex);
}
}
unsafe public void Write(ResKey reskey, byte[] payload, uint encoding, uint kind, CongestionControl congestionControl)
{
fixed(byte *p = payload)
{
ZnWriteExt(this._nativePtr, reskey._key, (IntPtr)p, (uint)payload.Length, encoding, kind, congestionControl);
}
}
