static void worker(object param)
{
RcvQueue self = param as RcvQueue;
if (self == null)
{
return;
}
IPEndPoint addr = new IPEndPoint(IPAddress.Any, 0);
UDT u = null;
int id;
while (!self.m_bClosing)
{
self.m_pTimer.tick();
// check waiting list, if new socket, insert it to the list
while (self.ifNewEntry())
{
UDT ne = self.getNewEntry();
if (null != ne)
{
self.m_pRcvUList.insert(ne);
self.m_hash.Add(ne.m_SocketID, ne);
}
}
// find next available slot for incoming packet
Unit unit = new Unit();
unit.m_Packet.setLength(self.m_iPayloadSize);
// reading next incoming packet, recvfrom returns -1 is nothing has been received
if (self.m_pChannel.recvfrom(ref addr, unit.m_Packet) < 0)
{
goto TIMER_CHECK;
}
id = unit.m_Packet.GetId();
// ID 0 is for connection request, which should be passed to the listening socket or rendezvous sockets
if (0 == id)
{
if (null != self.m_pListener)
{
self.m_pListener.listen(addr, unit.m_Packet);
}
else if (null != (u = self.m_pRendezvousQueue.retrieve(addr, ref id)))
{
// asynchronous connect: call connect here
// otherwise wait for the UDT socket to retrieve this packet
if (!u.m_bSynRecving)
{
u.connect(unit.m_Packet);
}
else
{
Packet newPacket = new Packet();
newPacket.Clone(unit.m_Packet);
self.storePkt(id, newPacket);
}
}
}
else if (id > 0)
{
if (self.m_hash.TryGetValue(id, out u))
{
if (addr.Equals(u.m_pPeerAddr))
{
if (u.m_bConnected && !u.m_bBroken && !u.m_bClosing)
{
if (0 == unit.m_Packet.getFlag())
{
u.processData(unit);
}
else
{
u.processCtrl(unit.m_Packet);
}
u.checkTimers();
self.m_pRcvUList.update(u);
}
}
}
else if (null != (u = self.m_pRendezvousQueue.retrieve(addr, ref id)))
{
if (!u.m_bSynRecving)
{
u.connect(unit.m_Packet);
}
else
{
Packet newPacket = new Packet();
newPacket.Clone(unit.m_Packet);
self.storePkt(id, newPacket);
}
}
}
TIMER_CHECK:
// take care of the timing event for all UDT sockets
ulong currtime = Timer.rdtsc();
ulong ctime = currtime - 100000 * Timer.getCPUFrequency();
for (int i = 0; i < self.m_pRcvUList.m_nodeList.Count; ++i)
{
RNode ul = self.m_pRcvUList.m_nodeList[0];
if (ul.m_llTimeStamp >= ctime)
{
break;
}
u = ul.m_pUDT;
if (u.m_bConnected && !u.m_bBroken && !u.m_bClosing)
{
u.checkTimers();
self.m_pRcvUList.update(u);
}
else
{
// the socket must be removed from Hash table first, then RcvUList
self.m_hash.Remove(u.m_SocketID);
self.m_pRcvUList.remove(u);
u.m_pRNode.m_bOnList = false;
}
}
// Check connection requests status for all sockets in the RendezvousQueue.
self.m_pRendezvousQueue.updateConnStatus();
}
self.m_ExitCond.Set();
}
