void SegmentUIFrames(Int32 frameSize, Byte[] buffer, Frame.ProtocolVersion version)
{
Int32 tmpMaxSegments = MaxUISegments;
fSize = frameSize;
if (version.Equals(Frame.ProtocolVersion.V20))
{
tmpMaxSegments = 1; // No segmenter if using the old protocol
}
if (buf.Length <= fSize)
{
_segmentTotal = 1;
}
else
{
fSize--; // Reduce frame size by one byte if we will be using segmented frames
_segmentTotal = (buffer.Length + (fSize - 1)) / fSize;
}
if (_segmentTotal > tmpMaxSegments)
{
throw new Exception("Data buffer too large. " + fSize * tmpMaxSegments + " byte maximum");
}
}
public Segmenter(Int32 frameSize, Byte[] buffer, Frame.FrameTypes frameType, Frame.ProtocolVersion version)
{
fType = frameType;
buf = buffer;
fSize = frameSize;
if (frameType.Equals(Frame.FrameTypes.IType))
{
//
// Call the IFRame segmenter. This segmenter does not use fragmented packets
//
SegmentIFrames(frameSize, buffer);
}
else
{
//
// Call the UIFRame segmenter. This segmenter does use fragmented packets if we're running V22 protocol
//
SegmentUIFrames(frameSize, buffer, version);
}
}
public void SendDatagram(String destinationStation, String relayStation1, String relayStation2, Byte[] buf, Frame.ProtocolVersion version)
{
//
// Split the datagram into segment as needed and send them off
// Note the buffer returned from GetNextSegment has the appropriate PID byte(s)
// prepended to the data.
//
Int32 tmpFSize = defMaxUFrameSize;
Station stationLink = new Station();
stationLink.sourceStation = _localStationAddress;
stationLink.destinationStation.SetCallSign(destinationStation);
if (relayStation1.Length > 0)
{
stationLink.relayStation1.SetCallSign(relayStation1);
if (relayStation2.Length > 0)
{
stationLink.relayStation2.SetCallSign(relayStation2);
}
}
//
// Use user selected value for new protocol version
//
if (version.Equals(Frame.ProtocolVersion.V22))
{
tmpFSize = _maxUFrameSize;
}
Segmenter segment = new Segmenter(tmpFSize, buf, Frame.FrameTypes.UIType, version);
do
{
Frame.Packet packet = new Frame.Packet(
Frame.TransmitFrameBuild(stationLink, Station.CommandResponse.DoCommand, 0,
Frame.FrameTypes.UIType, segment.GetNextSegment()));
dataLinkProviderQ.Enqueue(packet);
} while (segment.segmentsRemaining > 0);
}
public void SendDatagram(String destinationStation, String relayStation1, Byte[] buf, Frame.ProtocolVersion version)
{
SendDatagram(destinationStation, relayStation1, "", buf, version);
}
