msdu-aggregator.h

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/* -*- Mode:C++; c-file-style:"gnu"; indent-tabs-mode:nil; -*- */
/*
 * Copyright (c) 2009 MIRKO BANCHI
 *
 * 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: Mirko Banchi <mk.banchi@gmail.com>
 */

#ifndef MSDU_AGGREGATOR_H
#define MSDU_AGGREGATOR_H

#include "ns3/object.h"
#include "ns3/nstime.h"
#include "wifi-mode.h"
#include "qos-utils.h"

namespace ns3 {

class AmsduSubframeHeader;
class Packet;
class QosTxop;
class WifiMacQueueItem;
class WifiTxVector;

class MsduAggregator : public Object
{
public:
  typedef std::list<std::pair<Ptr<Packet>, AmsduSubframeHeader> > DeaggregatedMsdus;
  typedef std::list<std::pair<Ptr<Packet>, AmsduSubframeHeader> >::const_iterator DeaggregatedMsdusCI;
  typedef std::map<AcIndex, Ptr<QosTxop> > EdcaQueues;

  static TypeId GetTypeId (void);

  MsduAggregator ();
  virtual ~MsduAggregator ();

  void Aggregate (Ptr<const Packet> msdu, Ptr<Packet> amsdu,
                  Mac48Address src, Mac48Address dest) const;

  static uint16_t GetSizeIfAggregated (uint16_t msduSize, uint16_t amsduSize);

  Ptr<WifiMacQueueItem> GetNextAmsdu (Mac48Address recipient, uint8_t tid,
                                      WifiTxVector txVector, uint32_t ampduSize = 0,
                                      Time ppduDurationLimit = Seconds (0)) const;

  uint16_t GetMaxAmsduSize (Mac48Address recipient, uint8_t tid,
                            WifiModulationClass modulation) const;

  static DeaggregatedMsdus Deaggregate (Ptr<Packet> aggregatedPacket);

  void SetEdcaQueues (EdcaQueues map);

private:
  static uint8_t CalculatePadding (uint16_t amsduSize);

  EdcaQueues m_edca;   
};

} //namespace ns3

#endif /* MSDU_AGGREGATOR_H */