/// <summary>
/// Initializes a new <see cref="TlvBlock"/> from received data
/// </summary>
/// <param name="data">A received data buffer</param>
/// <param name="startIndex">The start of the TLV block in the data buffer</param>
/// <param name="readLength">The length of the TLV block in the data buffer</param>
public TlvBlock(byte[] data, int startIndex, int readLength)
{
wasReceived = true;
int endIndex = startIndex + readLength;
while (startIndex < endIndex)
{
Tlv tlv = new Tlv();
tlv.TypeNumber = (ushort)((data[startIndex] << 8) | data[startIndex + 1]);
startIndex += 2;
tlv.DataSize = (ushort)((data[startIndex] << 8) | data[startIndex + 1]);
startIndex += 2;
tlv.Data = new byte[tlv.DataSize];
Array.Copy(data, startIndex, tlv.Data, 0, tlv.DataSize);
startIndex += tlv.DataSize;
tlvList.Add(tlv);
}
}
/// <summary>
/// Initializes a new <see cref="TlvBlock"/> from received data
/// </summary>
/// <param name="data">A received data buffer</param>
/// <param name="startIndex">The start of the TLV block in the data buffer</param>
/// <param name="readLength">The length of the TLV block in the data buffer</param>
public TlvBlock(byte[] data, int startIndex, int readLength)
{
wasReceived = true;
int endIndex = startIndex + readLength;
while (startIndex < endIndex)
{
Tlv tlv = new Tlv();
tlv.TypeNumber = (ushort)((data[startIndex] << 8) | data[startIndex + 1]);
startIndex += 2;
tlv.DataSize = (ushort)((data[startIndex] << 8) | data[startIndex + 1]);
startIndex += 2;
tlv.Data = new byte[tlv.DataSize];
Array.Copy(data, startIndex, tlv.Data, 0, tlv.DataSize);
startIndex += tlv.DataSize;
tlvList.Add(tlv);
}
}
/// <summary>
/// Reads one tlv in a tlv block
/// </summary>
/// <param name="typeCode">the typecode of the tlv</param>
/// <returns>the tlv object</returns>
public Tlv ReadTlv(int typeCode)
{
int counter = 0;
Tlv retVal = null;
foreach (Tlv tlv in tlvList)
{
if (tlv.TypeNumber == typeCode)
{
retVal = tlv;
counter++;
}
}
if (counter != 1)
{
throw new ApplicationException(
"Invalid method call 'TlvBlock.ReadTlv(int)'. There are '" + counter +
"' tlvs with the typecode '" + typeCode +
". But only one tlv with this code was expected");
}
return(retVal);
}