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/* -*- Mode: C++; c-file-style: "gnu"; indent-tabs-mode:nil; -*- */
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/*
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* Copyright (c) 2006, 2009 INRIA
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* Copyright (c) 2009 MIRKO BANCHI
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*
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* This program is free software; you can redistribute it and/or modify
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* it under the terms of the GNU General Public License version 2 as
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* published by the Free Software Foundation;
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*
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License
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* along with this program; if not, write to the Free Software
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* Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
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*
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* Author: Mathieu Lacage <mathieu.lacage@sophia.inria.fr>
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* Author: Mirko Banchi <mk.banchi@gmail.com>
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*/
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#ifndef EDCA_TXOP_N_H
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#define EDCA_TXOP_N_H
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#include "ns3/object.h"
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#include "ns3/mac48-address.h"
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#include "ns3/packet.h"
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#include "wifi-mode.h"
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#include "wifi-mac.h"
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#include "wifi-mac-header.h"
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#include "qos-utils.h"
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#include <map>
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#include <list>
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namespace ns3 {
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class DcfState;
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class DcfManager;
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class MacLow;
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class MacTxMiddle;
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class WifiMacParameters;
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class WifiMacQueue;
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class RandomStream;
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class MsduAggregator;
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/* This queue contains packets for a particular access class.
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* possibles access classes are:
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*
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* -AC_VO : voice, tid = 6,7 ^
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* -AC_VI : video, tid = 4,5 |
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* -AC_BE : best-effort, tid = 0,3 | priority
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* -AC_BK : background, tid = 1,2 |
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*
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* For more details see section 9.1.3.1 in 802.11 standard.
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*/
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enum TypeOfStation
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{
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STA,
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AP,
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ADHOC_STA
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};
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class EdcaTxopN : public Object
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{
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public:
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typedef Callback <void, WifiMacHeader const&> TxOk;
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typedef Callback <void, WifiMacHeader const&> TxFailed;
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static TypeId GetTypeId (void);
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EdcaTxopN ();
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virtual ~EdcaTxopN ();
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void DoDispose ();
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void SetLow (Ptr<MacLow> low);
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void SetTxMiddle (MacTxMiddle *txMiddle);
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void SetManager (DcfManager *manager);
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void SetTxOkCallback (TxOk callback);
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void SetTxFailedCallback (TxFailed callback);
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void SetWifiRemoteStationManager (Ptr<WifiRemoteStationManager> remoteManager);
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void SetTypeOfStation (enum TypeOfStation type);
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enum TypeOfStation GetTypeOfStation (void) const;
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void SetMaxQueueSize (uint32_t size);
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void SetMaxQueueDelay (Time delay);
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void SetMinCw (uint32_t minCw);
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void SetMaxCw (uint32_t maxCw);
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void SetAifsn (uint32_t aifsn);
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uint32_t GetMinCw (void) const;
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uint32_t GetMaxCw (void) const;
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uint32_t GetAifsn (void) const;
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Ptr<MacLow> Low (void);
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Ptr<MsduAggregator> GetMsduAggregator (void) const;
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/* dcf notifications forwarded here */
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bool NeedsAccess (void) const;
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void NotifyAccessGranted (void);
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void NotifyInternalCollision (void);
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void NotifyCollision (void);
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/*event handlers*/
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void GotCts (double snr, WifiMode txMode);
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void MissedCts (void);
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void GotAck (double snr, WifiMode txMode);
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void MissedAck (void);
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void StartNext (void);
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void Cancel (void);
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void RestartAccessIfNeeded (void);
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void StartAccessIfNeeded (void);
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bool NeedRts (void);
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bool NeedRtsRetransmission (void);
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bool NeedDataRetransmission (void);
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bool NeedFragmentation (void) const;
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uint32_t GetNextFragmentSize (void);
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uint32_t GetFragmentSize (void);
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uint32_t GetFragmentOffset (void);
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WifiRemoteStation *GetStation (Mac48Address to) const;
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bool IsLastFragment (void) const;
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void NextFragment (void);
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Ptr<Packet> GetFragmentPacket (WifiMacHeader *hdr);
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void Queue (Ptr<const Packet> packet, WifiMacHeader const &hdr);
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void SetMsduAggregator (Ptr<MsduAggregator> aggr);
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private:
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/**
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* This functions are used only to correctly set addresses in a-msdu subframe.
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* If aggregating sta is a STA (in an infrastructured network):
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* SA = Address2
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* DA = Address3
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* If aggregating sta is an AP
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* SA = Address3
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* DA = Address1
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*/
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Mac48Address MapSrcAddressForAggregation (WifiMacHeader const &hdr);
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Mac48Address MapDestAddressForAggregation (WifiMacHeader const &hdr);
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class Dcf;
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class TransmissionListener;
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friend class Dcf;
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friend class TransmissionListener;
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Dcf *m_dcf;
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DcfManager *m_manager;
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Ptr<WifiMacQueue> m_queue;
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TxOk m_txOkCallback;
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TxFailed m_txFailedCallback;
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Ptr<MacLow> m_low;
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MacTxMiddle *m_txMiddle;
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TransmissionListener *m_transmissionListener;
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RandomStream *m_rng;
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Ptr<WifiRemoteStationManager> m_stationManager;
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uint8_t m_fragmentNumber;
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/* current packet could be a simple MSDU or, if an aggregator for this queue is
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present, could be an A-MSDU.
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*/
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Ptr<const Packet> m_currentPacket;
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WifiMacHeader m_currentHdr;
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Ptr<MsduAggregator> m_aggregator;
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TypeOfStation m_typeOfStation;
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};
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} //namespace ns3
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#endif /* EDCA_TXOP_N_H */
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