public TransportSegment(TransportHeader transportHeader)
{
TransportHeader = transportHeader;
}
public List <byte[]> PackDown(byte[] data, bool isRequest, bool isMaster)
{
List <byte[]> segments = new List <byte[]>();
bool fir = true;
byte sequence = 0;
TransportHeader transportHeader = new TransportHeader();
TransportSegment transportSegment = new TransportSegment(transportHeader);
int dataCount = data.Count();
int dataIndex = 0;
while (dataCount > 0)
{
if (sequence == 64)
{
sequence = 0;
}
else
{
sequence++;
}
int totalLength = 1;
byte[] temp = null;
if (fir)
{
transportHeader.Header[6] = true; // FIR
fir = false;
sequence = 0;
}
else
{
transportHeader.Header[6] = false; // FIR
}
if (dataCount <= segmentMaxSize)
{
transportHeader.Header[7] = true; // FIN
temp = new byte[dataCount + 1];
for (int i = 1; i <= dataCount; i++)
{
temp[i] = data[dataIndex++];
}
totalLength += dataCount;
}
else
{
temp = new byte[segmentMaxSize + 1];
for (int i = 1; i <= dataCount; i++)
{
temp[i] = data[dataIndex++];
}
totalLength += segmentMaxSize;
}
dataCount -= segmentMaxSize;
dataIndex += segmentMaxSize;
BitArray tempSeq = new BitArray(new byte[] { sequence });
transportHeader.Header[5] = tempSeq[5]; // Sequence
transportHeader.Header[4] = tempSeq[4];
transportHeader.Header[3] = tempSeq[3];
transportHeader.Header[3] = tempSeq[2];
transportHeader.Header[2] = tempSeq[1];
transportHeader.Header[0] = tempSeq[0];
temp[0] = transportHeader.ToBytes()[0];
byte[] finalDataLinkSegment = new byte[totalLength];
for (int i = 0; i < totalLength; i++)
{
finalDataLinkSegment[i] = temp[i];
}
segments.Add(finalDataLinkSegment);
}
List <byte[]> returnValue = new List <byte[]>();
DNP3DataLinkHandler = new DataLinkHandler();
foreach (byte[] segment in segments)
{
List <byte[]> tempSegments = new List <byte[]>()
{
DNP3DataLinkHandler.PackDown(segment, isRequest, isMaster, DataLinkFunctionCodes.UNCONFIRMED_USER_DATA)
};
foreach (byte[] tempSegment in tempSegments)
{
returnValue.Add(tempSegment);
}
}
return(returnValue);
}
