/// <summary>
/// packets are written by the endpoint
/// </summary>
/// <param name="p"></param>
public void receive(UDTPacket p)
{
if (storeStatistics)
{
dgReceiveInterval.end();
}
handoffQueue.Enqueue(p);
if (storeStatistics)
{
dgReceiveInterval.begin();
}
}
/// <summary>
/// sends the given data packet, storing the relevant information
/// 发送存储相关信息的数据包
/// </summary>
/// <param name="p"></param>
private void send(DataPacket p)
{
lock (sendLock)
{
if (storeStatistics)
{
dgSendInterval.end();
dgSendTime.begin();
}
endpoint.doSend(p);
if (storeStatistics)
{
dgSendTime.end();
dgSendInterval.begin();
throughput.end();
throughput.begin();
}
sendBuffer[p.getPacketSequenceNumber()] = p;
unacknowledged.IncrementAndGet();
}
statistics.incNumberOfSentDataPackets();
}
protected void processUDTPacket(UDTPacket p)
{
//(3).Check the packet type and process it according to this.
try
{
if (!p.isControlPacket())
{
DataPacket dp = (DataPacket)p;
if (storeStatistics)
{
dataPacketInterval.end();
dataProcessTime.begin();
}
onDataPacketReceived(dp);//解析数据包将数据存在AppData类中
if (storeStatistics)
{
dataProcessTime.end();
dataPacketInterval.begin();
}
}
else if (p.getControlPacketType() == (int)ControlPacketType.ACK2)
{
Acknowledgment2 ack2 = (Acknowledgment2)p;
onAck2PacketReceived(ack2);
}
else if (p is Shutdown)
{
onShutdown();
}
}
catch (Exception exc)
{
Log.Write(this.ToString(), exc);
}
}
/// <summary>
/// receiver algorithm
/// see specification P11.
/// </summary>
public void receiverAlgorithm()
{
try
{
if (handoffQueue.Count <= 0)
{
Thread.Yield();
}
else
{
//check ACK timer
long currentTime = Util.getCurrentTime();
#region 暂时,屏蔽不然会一直发包(不知道这段是启什么作用)
//if (nextACK < currentTime)
//{
// nextACK = currentTime + ackTimerInterval;
// processACKEvent(true);
//}
////check NAK timer
//if (nextNAK < currentTime)
//{
// nextNAK = currentTime + nakTimerInterval;
// processNAKEvent();
//}
////check EXP timer
//if (nextEXP < currentTime)
//{
// nextEXP = currentTime + expTimerInterval;
// processEXPEvent();
//}
#endregion
//perform time-bounded UDP receive
UDTPacket packet = handoffQueue.Dequeue();
if (packet != null)
{
////reset exp count to 1
//expCount = 1;
////If there is no unacknowledged data packet, or if this is an
////ACK or NAK control packet, reset the EXP timer.
//bool needEXPReset = false;
//if (packet.isControlPacket())
//{
// ControlPacket cp = (ControlPacket)packet;
// int cpType = cp.getControlPacketType();
// if (cpType == (int)ControlPacketType.ACK || cpType == (int)ControlPacketType.NAK)
// {
// needEXPReset = true;
// }
//}
//if (needEXPReset)
//{
// nextEXP = Util.getCurrentTime() + expTimerInterval;
//}
if (storeStatistics)
{
processTime.begin();
}
//解析数据包将数据存在AppData类中
processUDTPacket(packet);
if (storeStatistics)
{
processTime.end();
}
}
Thread.Yield();
}
}
catch (Exception exc)
{
Log.Write(this.ToString(), exc);
}
}
