tcp-error-model.h

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/*
 * Copyright (c) 2015 Natale Patriciello <natale.patriciello@gmail.com>
 *
 * 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
 *
 */
#ifndef TCPERRORCHANNEL_H
#define TCPERRORCHANNEL_H
 
#include "ns3/error-model.h"
#include "ns3/ipv4-header.h"
#include "ns3/tcp-header.h"
 
namespace ns3
{
 
class TcpGeneralErrorModel : public ErrorModel
{
  public:
    static TypeId GetTypeId();
    TcpGeneralErrorModel();
 
    void SetDropCallback(Callback<void, const Ipv4Header&, const TcpHeader&, Ptr<const Packet>> cb)
    {
        m_dropCallback = cb;
    }
 
  protected:
    virtual bool ShouldDrop(const Ipv4Header& ipHeader,
                            const TcpHeader& tcpHeader,
                            uint32_t packetSize) = 0;
 
  private:
    bool DoCorrupt(Ptr<Packet> p) override;
    Callback<void, const Ipv4Header&, const TcpHeader&, Ptr<const Packet>>
        m_dropCallback; 
};
 
class TcpSeqErrorModel : public TcpGeneralErrorModel
{
  public:
    static TypeId GetTypeId();
 
    TcpSeqErrorModel()
        : TcpGeneralErrorModel()
    {
    }
 
    void AddSeqToKill(const SequenceNumber32& seq)
    {
        m_seqToKill.insert(m_seqToKill.end(), seq);
    }
 
  protected:
    bool ShouldDrop(const Ipv4Header& ipHeader,
                    const TcpHeader& tcpHeader,
                    uint32_t packetSize) override;
 
  protected:
    std::list<SequenceNumber32> m_seqToKill; 
 
  private:
    void DoReset() override;
};
 
class TcpFlagErrorModel : public TcpGeneralErrorModel
{
  public:
    static TypeId GetTypeId();
    TcpFlagErrorModel();
 
    void SetFlagToKill(TcpHeader::Flags_t flags)
    {
        m_flagsToKill = flags;
    }
 
    void SetKillRepeat(int16_t killNumber)
    {
        m_killNumber = killNumber;
    }
 
  protected:
    bool ShouldDrop(const Ipv4Header& ipHeader,
                    const TcpHeader& tcpHeader,
                    uint32_t packetSize) override;
 
  protected:
    TcpHeader::Flags_t m_flagsToKill; 
    int16_t m_killNumber;             
 
  private:
    void DoReset() override;
};
 
} // namespace ns3
 
#endif // TCPERRORCHANNEL_H