void TcpSocketBase::RefreshWindowSize(TcpHeader &header)

{

    //if connection is not established, just receive window size from packets

    //because if in stage of 3-way handshakes reordering can not occure, because

    // only 1 packet in specail time in way.

    if (m_state  < ESTABLISHED)

    {

        m_rWnd = header.GetWindowSize ();

        m_rWnd <<= m_rcvScaleFactor;

        return;

    }

    //if connection establish or lead to finish

    //if new sequence or ack number were received less than which was before

    //it's mean that re-ordering occure

    bool reorder = false;

    if (header.GetAckNumber ().GetValue () < m_biggestAckNumber.GetValue ())

    {

        reorder = true;

    }

    if (header.GetSequenceNumber ().GetValue () < m_biggestSequenceNumber.GetValue ())

    {

        reorder = true;

    }

    if (reorder == false)

    {

        m_rWnd = header.GetWindowSize ();

        m_rWnd <<= m_rcvScaleFactor;

        m_biggestAckNumber = header.GetAckNumber();

        m_biggestSequenceNumber = header.GetSequenceNumber ();

    }

}