//
// 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 a receive buffer.
// - 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()
{
String parsedFrameString = "";
Byte[] buf;
Support.DbgPrint(Thread.CurrentThread.Name + "Starting.");
while (runFlag && comSerialPort.Enabled)
{
try
{
buf = Recv();
}
catch
{
continue;
}
if (buf == null)
{
continue;
}
// check for ACKMODE Response (Need to be at channel level to find DLC) (JNW Jan15)
if (buf.Length == 2) // Only ACK frames are this short
{
Int16 AckID = (Int16)(buf[0] << 8 | buf[1]);
Connection con;
lock (dataLinkProviderList)
foreach (DataLinkProvider dlp in dataLinkProviderList)
{
con = GetConnectionByACKModeID(dlp, AckID);
if (con != null)
{
// Set Timer back to normal
con.timerAck.SetTime(con.smoothedRoundTrip, true);
break;
}
}
continue; // Donf pass Ack frame up to next level
}
//
// Parse raw buffer
//
Frame.ReceivedFrame pFrame = new Frame.ReceivedFrame(buf, out parsedFrameString);
//
// Output to monitor queue is enabled
//
if (!_packetMonitorEnable.Equals(PacketMonitorType.None))
{
StringBuilder frameString = new StringBuilder("|chan:" + chanNum.ToString() + "|<--", 4096);
frameString.Append(parsedFrameString);
if (_packetMonitorEnable.Equals(PacketMonitorType.LogFile) || _packetMonitorEnable.Equals(PacketMonitorType.Both))
{
Support.PktPrint(frameString.ToString() + CRLF, ref packetLogSyncObject);
}
if (_packetMonitorEnable.Equals(PacketMonitorType.Queue) || _packetMonitorEnable.Equals(PacketMonitorType.Both))
{
packetMonitorQueue.Enqueue(frameString.ToString());
}
}
Frame.Packet packet = new Frame.Packet(pFrame);
DigipeatCheckAndProcess(packet);
//continue;
//
// Send up to the data link provider handling the specified StationID
//
//dlp.Send(packet);
}
Support.DbgPrint(Thread.CurrentThread.Name + "Exiting.");
}
public Packet(Frame.ReceivedFrame receivedType)
{
receivedFrame = receivedType;
}