//
// Procesing thread for incoming packets from the TNC. The TNC places a buffer
// containing the incoming data into the channel's receive queue. This routine pulls
// these frames from the queue for processing.
//
// Processing steps:
// - Parse the raw incoming frame into an HDLC buffer. This process
// removes the byte stuffing and verifies the packet CRC.
// - Find the Data Link Provider handling incoming data for the Station ID
// specified in the incoming address field of the packet. If no matching
// dlp is registered, then we simply drop the packet. (Future: we add in support
// for multi-cast packets, which will forward to all registered DLPs)
// - Place the frame, source, and buffer type into a packet object and place it into the
// receive queue of the target DLP.
//
void RecvFromPort()
{
Byte[] buf;
while (runState.Equals(RunState.Running))
{
try
{
buf = channel.Recv();
}
catch
{
continue;
}
if (buf == null)
{
continue;
}
//
// Parse raw buffer
//
AX25Frame.ParsedFrame pFrame = new AX25Frame.ParsedFrame(HDLCFramer.ParseHDLCFrame(buf));
AX25Frame.Packet pkt = new AX25Frame.Packet(
AX25Frame.Packet.PacketType.ParsedFrame,
AX25Frame.Packet.Source.Remote,
pFrame);
//
// Look for the DLP handling this packet destination
//
DataLinkProvider dlp = GetProvider(pFrame.frameInfo.staLink.destinationAddr.stationIDString);
if (dlp == null)
{
//
// Ignore the packet and Loop if we cannot find a provider for the incoming frame
// TODO - Add support for multi-cast
//
continue;
}
//
// Send up to the data link provider handling the specified StationID
//
dlp.dataLinkProviderQ.Enqueue(pkt);
}
}
public static void Run()
{
try
{
if (ObjectManager.Instance.IsIngame && CurrentState.Equals(RunState.Running))
{
stateMachine.DoWork();
}
}
catch (ThreadAbortException)
{
}
catch (Exception e)
{
Logger.Log("Doh exception in the botting function: " + e);
}
}
