/// <summary>
/// Creates a new instance of this class by parsing the given data
/// </summary>
/// <param name="bData">The byte array to parse</param>
public TCPFrame(byte[] bData)
{
int iDataOffset; //In bits.
iSourcePort = bData[0] * 256 + bData[1];
iDestinationPort = bData[2] * 256 + bData[3];
iSequenceNumber = (uint)(bData[4] * (uint)(256 * 256 * 256) + bData[5] * (uint)(256 * 256) + bData[6] * (uint)256 + bData[7]);
iAcknowledgmentNumber = (uint)(bData[8] * (uint)(256 * 256 * 256) + bData[9] * (uint)(256 * 256) + bData[10] * (uint)256 + bData[11]);
iDataOffset = (int)((bData[12] & 0xF0) >> 4) * 4;
if (iDataOffset < 20)
{
throw new ArgumentException("Invalid packet header");
}
bUrgent = (bData[13] & 0x20) > 0;
bAcknowledgement = (bData[13] & 0x10) > 0;
bPush = (bData[13] & 0x8) > 0;
bReset = (bData[13] & 0x4) > 0;
bSynchronize = (bData[13] & 0x2) > 0;
bFinish = (bData[13] & 0x1) > 0;
iWindow = bData[14] * (uint)256 + bData[15];
bChecksum = new byte[2];
bChecksum[0] = bData[16];
bChecksum[1] = bData[17];
iUrgentPointer = bData[18] * (uint)256 + bData[19];
byte[] bOptions = new byte[iDataOffset - 20];
for (int iC1 = 20; iC1 < iDataOffset; iC1++)
{
bOptions[iC1 - 20] = bData[iC1];
}
this.oOptions = new TCPOptions(bOptions);
byte[] bEncapsulatedData = new byte[bData.Length - iDataOffset];
for (int iC1 = iDataOffset; iC1 < bData.Length; iC1++)
{
bEncapsulatedData[iC1 - iDataOffset] = bData[iC1];
}
this.fEncapsulatedFrame = new RawDataFrame(bEncapsulatedData);
}
/// <summary>
/// Creates a new empty instance of this class
/// </summary>
public TCPFrame()
{
iSourcePort = 0;
iDestinationPort = 0;
iSequenceNumber = 0;
iAcknowledgmentNumber = 0;
bUrgent = false;
bAcknowledgement = false;
bPush = false;
bReset = false;
bSynchronize = false;
bFinish = false;
iWindow = 0;
bChecksum = new byte[2];
iUrgentPointer = 0;
oOptions = new TCPOptions();
fEncapsulatedFrame = null;
}
