tcp-lp.h

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/*
 * Copyright (c) 2016 NITK Surathkal
 *
 * This program is free software; you can redistribute it and/or modify
 * it under the terms of the GNU General Public License version 2 as
 * published by the Free Software Foundation;
 *
 * This program is distributed in the hope that it will be useful,
 * but WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
 * GNU General Public License for more details.
 *
 * You should have received a copy of the GNU General Public License
 * along with this program; if not, write to the Free Software
 * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA
 *
 * Authors: Charitha Sangaraju <charitha29193@gmail.com>
 *          Nandita G <gm.nandita@gmail.com>
 *          Mohit P. Tahiliani <tahiliani@nitk.edu.in>
 *
 */
 
#ifndef TCPLP_H
#define TCPLP_H
 
#include "tcp-congestion-ops.h"
 
#include "ns3/traced-value.h"
 
namespace ns3
{
 
class TcpSocketState;
 
class TcpLp : public TcpNewReno
{
  public:
    static TypeId GetTypeId();
 
    TcpLp();
 
    TcpLp(const TcpLp& sock);
 
    ~TcpLp() override;
 
    void PktsAcked(Ptr<TcpSocketState> tcb, uint32_t segmentsAcked, const Time& rtt) override;
 
    std::string GetName() const override;
 
    Ptr<TcpCongestionOps> Fork() override;
 
  protected:
    void CongestionAvoidance(Ptr<TcpSocketState> tcb, uint32_t segmentsAcked) override;
 
  private:
    enum State
    {
        LP_VALID_OWD = (1 << 1),  
        LP_WITHIN_THR = (1 << 3), 
        LP_WITHIN_INF = (1 << 4), 
    };
 
    uint32_t m_flag;      
    uint32_t m_sOwd;      
    uint32_t m_owdMin;    
    uint32_t m_owdMax;    
    uint32_t m_owdMaxRsv; 
    Time m_lastDrop;      
    Time m_inference;     
 
  private:
    uint32_t OwdCalculator(Ptr<TcpSocketState> tcb);
 
    void RttSample(Ptr<TcpSocketState> tcb);
};
 
} // namespace ns3
 
#endif // TCPLP_H