internal static void WriteHeader(byte[] buffer, int offset,
ushort sourcePort, ushort destinationPort,
uint sequenceNumber, uint acknowledgmentNumber,
TcpControlBits controlBits, ushort window, ushort urgentPointer,
TcpOptions options)
{
int headerLength = HeaderMinimumLength + options.BytesLength;
WriteHeader(buffer, offset, sourcePort, destinationPort);
buffer.Write(offset + Offset.SequenceNumber, sequenceNumber, Endianity.Big);
buffer.Write(offset + Offset.AcknowledgmentNumber, acknowledgmentNumber, Endianity.Big);
buffer.Write(offset + Offset.HeaderLengthAndFlags, (ushort)(((ushort)((headerLength / 4) << 12)) | (ushort)controlBits), Endianity.Big);
buffer.Write(offset + Offset.Window, window, Endianity.Big);
buffer.Write(offset + Offset.UrgentPointer, urgentPointer, Endianity.Big);
options.Write(buffer, offset + Offset.Options);
}
internal static void WriteHeader(byte[] buffer, int offset, ushort sourcePort, ushort destinationPort, uint sequenceNumber, uint acknowledgmentNumber, TcpControlBits controlBits, ushort window, ushort urgentPointer, TcpOptions options)
{
int num = 20 + options.BytesLength;
TransportDatagram.WriteHeader(buffer, offset, sourcePort, destinationPort);
ByteArrayExtensions.Write(buffer, offset + 4, sequenceNumber, Endianity.Big);
ByteArrayExtensions.Write(buffer, offset + 8, acknowledgmentNumber, Endianity.Big);
ByteArrayExtensions.Write(buffer, offset + 12, (ushort)((TcpControlBits)(num / 4 << 12) | controlBits), Endianity.Big);
ByteArrayExtensions.Write(buffer, offset + 14, window, Endianity.Big);
ByteArrayExtensions.Write(buffer, offset + 18, urgentPointer, Endianity.Big);
options.Write(buffer, offset + 20);
}
