/// <summary>
/// Get the content of a TLV value part
/// </summary>
/// <param name="buffer">Buffer to extract the TLV from.
/// This buffer must contain ONLY TLV fields as it will rely on the available siez to stop searching TLVs.
/// If the buffer contains something else than TLV fields, the function won't notice it.</param>
/// <param name="start">Start position inside the buffer to retrieve the TLV</param>
/// <param name="offset">Offset after the TLV</param>
public static CTLV ExtractTLV(byte[] buffer, int start, out int offset)
{
CTLV tlv = null;
offset = start;
if (buffer.Length - offset > CTLV.TLV_SIZE_T + CTLV.TLV_SIZE_L + 1)
{
byte[] rawdata;
int mystart = start;
CEncoderAN encoderAN = new CEncoderAN();
// enough room for T+L+V (1 byte at least)
//get T
string T = (encoderAN.Decode(buffer, offset, CTLV.TLV_SIZE_T, CTLV.TLV_SIZE_T, out offset, out rawdata)).ToString();
// get L
short L = (short)CMisc.StrToLong(encoderAN.ToString(encoderAN.Decode(buffer, offset, CTLV.TLV_SIZE_L, CTLV.TLV_SIZE_L, out offset, out rawdata)));
if (0 != tlv.L)
{
if (buffer.Length - offset >= L)
{
byte[] V = new byte[L];
// get V
Buffer.BlockCopy(buffer, offset, V, 0, L);
offset += tlv.L;
tlv = new CTLV(T, L, FieldType.NONE);
tlv.SetV(V);
return(tlv);
}
else
{
throw new CInvalidDataSizeException("TAG " + T, L, buffer.Length - offset);
}
}
else
{
throw new CInvalidValueException("TAG " + T, L.ToString());
}
}
else
{
throw new CInvalidDataSizeException("TLV", CTLV.TLV_SIZE_T + CTLV.TLV_SIZE_L + 1, buffer.Length - offset);
}
}
private void SetButtons()
{
pbReadCheck.Enabled = pbWriteCheck.Enabled = Elc.Opened;
pbSendIPDU.Enabled = (0 != CMisc.StrToLong(F4.Text)) && (0 == F43_POS1.Text.Length || F43_POS1.MaskCompleted) && (0 == F43_POS6.Text.Length || F43_POS6.MaskCompleted);
}