--- tcp-socket-base.h	2015-03-24 11:51:26.652635000 +0300
+++ tcp-socket-base.h	2015-04-04 18:33:16.785689922 +0300
@@ -675,6 +675,12 @@ 
    */
   void AddOptionTimestamp (TcpHeader& header);
 
+  /**
+   * \brief Refresh Window Size, with checking reordering of packets
+   * \param header TcpHeader from which take new WindowSize
+   */
+  void RefreshWindowSize(TcpHeader& header);
+
 
 protected:
   // Counters and events
@@ -724,6 +730,10 @@ 
   bool                     m_connected;     //!< Connection established
   double                   m_msl;           //!< Max segment lifetime
 
+  // the highest Sequence and Ack numbers, using for updating window ard/or detect reordering
+  SequenceNumber32 m_highestSequenceNumber;
+  SequenceNumber32 m_highestAckNumber;
+
   // Window management
   uint32_t              m_segmentSize; //!< Segment size
   uint16_t              m_maxWinSize;  //!< Maximum window size to advertise