public TCPCopycatPacket(TCPCopycatHeader h, Byte[] d)
{
header = h;
data = d;
}
public static TCPCopycatPacket parse(Byte[] byteData)
{
if (byteData.Length >= MAXIMUM_PACKET_SIZE)
{
throw new Exception("Data lenght must be lower than 1500 byte");
}
#region HeaderParsing
TCPCopycatHeader header = new TCPCopycatHeader();
int offset = 0;
/* header.dataLenght ************/
header.dataLenght = 0;
for (int i = 0; i < sizeof(int); ++i)
{
header.dataLenght = header.dataLenght << 8;
header.dataLenght += byteData[i + offset];
}
offset += sizeof(int);
/* header.sequenceNumber ********/
header.sequenceNumber = 0;
for (int i = 0; i < sizeof(int); ++i)
{
header.sequenceNumber = header.sequenceNumber << 8;
header.sequenceNumber += byteData[i + offset];
}
offset += sizeof(int);
/* header.acknowledgeNumber ********/
header.acknowledgeNumber = 0;
for (int i = 0; i < sizeof(int); ++i)
{
header.acknowledgeNumber = header.acknowledgeNumber << 8;
header.acknowledgeNumber += byteData[i + offset];
}
offset += sizeof(int);
/* header.windowSize ********/
header.windowSize = 0;
for (int i = 0; i < sizeof(Int16); ++i)
{
header.windowSize = (Int16)(header.windowSize << 8);
header.windowSize += byteData[i + offset];
}
offset += sizeof(Int16);
/* header.options ********/
header.options = 0;
for (int i = 0; i < sizeof(Int16); ++i)
{
header.options = (Int16)(header.options << 8);
header.options += byteData[i + offset];
}
offset += sizeof(Int16);
/* header.OPT ********/
header.OPT = 0;
for (int i = 0; i < sizeof(byte); ++i)
{
header.OPT = (byte)(header.OPT << 8);
header.OPT += byteData[i + offset];
}
offset += sizeof(byte);
/* header.ACK ********/
header.ACK = 0;
for (int i = 0; i < sizeof(byte); ++i)
{
header.ACK = (byte)(header.ACK << 8);
header.ACK += byteData[i + offset];
}
offset += sizeof(byte);
/* header.SYN ********/
header.SYN = 0;
for (int i = 0; i < sizeof(byte); ++i)
{
header.SYN = (byte)(header.SYN << 8);
header.SYN += byteData[i + offset];
}
offset += sizeof(byte);
/* header.FIN ********/
header.FIN = 0;
for (int i = 0; i < sizeof(byte); ++i)
{
header.FIN = (byte)(header.FIN << 8);
header.FIN += byteData[i + offset];
}
offset += sizeof(byte);
#endregion
#region DataParsing
Byte[] data = new byte[header.dataLenght];
for (int i = 0; i < data.Length; ++i) //parsing data
{
data[i] = byteData[i + offset];
}
#endregion
return(new TCPCopycatPacket(header, data));
}
