recipient-block-ack-agreement.h

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/* -*- Mode:C++; c-file-style:"gnu"; indent-tabs-mode:nil; -*- */
/*
 * 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 WifiMacQueueItem;
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 ();

  void SetMacRxMiddle (const Ptr<MacRxMiddle> rxMiddle);

  void NotifyReceivedMpdu (Ptr<WifiMacQueueItem> mpdu);
  void NotifyReceivedBar (uint16_t startingSequenceNumber);
  void FillBlockAckBitmap (CtrlBAckResponseHeader *blockAckHeader, std::size_t index = 0) const;
  void Flush (void);

private:
  void PassBufferedMpdusUntilFirstLost (void);

  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<WifiMacQueueItem>, Compare> m_bufferedMpdus; 
  Ptr<MacRxMiddle> m_rxMiddle;                                   
};

} //namespace ns3

#endif /* RECIPIENT_BLOCK_ACK_AGREEMENT_H */