recipient-block-ack-agreement.h

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/*
 * Copyright (c) 2020 Universita' degli Studi di Napoli Federico II
 *
 * 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
 *
 * Author: Stefano Avallone <stavallo@unina.it>
 */
#ifndef RECIPIENT_BLOCK_ACK_AGREEMENT_H
#define RECIPIENT_BLOCK_ACK_AGREEMENT_H
 
#include "block-ack-agreement.h"
#include "block-ack-window.h"
 
#include <map>
 
namespace ns3
{
 
class WifiMpdu;
class MacRxMiddle;
class CtrlBAckResponseHeader;
 
class RecipientBlockAckAgreement : public BlockAckAgreement
{
  public:
    RecipientBlockAckAgreement(Mac48Address originator,
                               bool amsduSupported,
                               uint8_t tid,
                               uint16_t bufferSize,
                               uint16_t timeout,
                               uint16_t startingSeq,
                               bool htSupported);
    ~RecipientBlockAckAgreement() override;
 
    void SetMacRxMiddle(const Ptr<MacRxMiddle> rxMiddle);
 
    void NotifyReceivedMpdu(Ptr<const WifiMpdu> mpdu);
    void NotifyReceivedBar(uint16_t startingSequenceNumber);
    void FillBlockAckBitmap(CtrlBAckResponseHeader* blockAckHeader, std::size_t index = 0) const;
    void Flush();
 
  private:
    void PassBufferedMpdusUntilFirstLost();
 
    void PassBufferedMpdusWithSeqNumberLessThan(uint16_t newWinStartB);
 
    typedef std::pair<uint16_t, uint16_t*> Key;
 
    struct Compare
    {
        bool operator()(const Key& a, const Key& b) const;
    };
 
    BlockAckWindow m_scoreboard; 
    uint16_t m_winStartB;        
    std::size_t m_winSizeB;      
    std::map<Key, Ptr<const WifiMpdu>, Compare>
        m_bufferedMpdus;         
    Ptr<MacRxMiddle> m_rxMiddle; 
};
 
} // namespace ns3
 
#endif /* RECIPIENT_BLOCK_ACK_AGREEMENT_H */