src/wifi/model/dca-txop.cc
author Mitch Watrous
Tue, 14 Aug 2012 13:52:17 -0700
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parent 7385 10beb0e53130
child 9176 41ab1e874804
permissions -rw-r--r--
Replace src/wifi usage of RandomVariable with RandomVariableStream
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/* -*- Mode:C++; c-file-style:"gnu"; indent-tabs-mode:nil; -*- */
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/*
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 * Copyright (c) 2005 INRIA
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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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 */
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#include "ns3/assert.h"
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#include "ns3/packet.h"
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#include "ns3/log.h"
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#include "ns3/simulator.h"
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#include "ns3/node.h"
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#include "ns3/uinteger.h"
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#include "ns3/pointer.h"
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#include "dca-txop.h"
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#include "dcf-manager.h"
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#include "mac-low.h"
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#include "wifi-mac-queue.h"
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#include "mac-tx-middle.h"
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#include "wifi-mac-trailer.h"
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#include "wifi-mac.h"
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#include "random-stream.h"
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NS_LOG_COMPONENT_DEFINE ("DcaTxop");
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#undef NS_LOG_APPEND_CONTEXT
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#define NS_LOG_APPEND_CONTEXT if (m_low != 0) { std::clog << "[mac=" << m_low->GetAddress () << "] "; }
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namespace ns3 {
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class DcaTxop::Dcf : public DcfState
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{
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public:
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  Dcf (DcaTxop * txop)
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    : m_txop (txop)
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  {
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  }
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private:
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  virtual void DoNotifyAccessGranted (void)
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  {
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    m_txop->NotifyAccessGranted ();
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  }
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  virtual void DoNotifyInternalCollision (void)
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  {
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    m_txop->NotifyInternalCollision ();
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  }
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  virtual void DoNotifyCollision (void)
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  {
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    m_txop->NotifyCollision ();
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  }
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  virtual void DoNotifyChannelSwitching (void)
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  {
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    m_txop->NotifyChannelSwitching ();
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  }
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  DcaTxop *m_txop;
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};
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class DcaTxop::TransmissionListener : public MacLowTransmissionListener
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{
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public:
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  TransmissionListener (DcaTxop * txop)
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    : MacLowTransmissionListener (),
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      m_txop (txop) {
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  }
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  virtual ~TransmissionListener () {}
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  virtual void GotCts (double snr, WifiMode txMode)
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  {
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    m_txop->GotCts (snr, txMode);
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  }
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  virtual void MissedCts (void)
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  {
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    m_txop->MissedCts ();
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  }
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  virtual void GotAck (double snr, WifiMode txMode)
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  {
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    m_txop->GotAck (snr, txMode);
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  }
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  virtual void MissedAck (void)
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  {
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    m_txop->MissedAck ();
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  }
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  virtual void StartNext (void)
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  {
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    m_txop->StartNext ();
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  }
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  virtual void Cancel (void)
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  {
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    m_txop->Cancel ();
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  }
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private:
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  DcaTxop *m_txop;
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};
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NS_OBJECT_ENSURE_REGISTERED (DcaTxop);
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TypeId
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DcaTxop::GetTypeId (void)
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{
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  static TypeId tid = TypeId ("ns3::DcaTxop")
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    .SetParent (ns3::Dcf::GetTypeId ())
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    .AddConstructor<DcaTxop> ()
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    .AddAttribute ("Queue", "The WifiMacQueue object",
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                   PointerValue (),
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                   MakePointerAccessor (&DcaTxop::GetQueue),
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                   MakePointerChecker<WifiMacQueue> ())
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  ;
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  return tid;
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}
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DcaTxop::DcaTxop ()
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  : m_manager (0),
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    m_currentPacket (0)
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{
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  NS_LOG_FUNCTION (this);
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  m_transmissionListener = new DcaTxop::TransmissionListener (this);
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  m_dcf = new DcaTxop::Dcf (this);
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  m_queue = CreateObject<WifiMacQueue> ();
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  m_rng = new RealRandomStream ();
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  m_txMiddle = new MacTxMiddle ();
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}
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DcaTxop::~DcaTxop ()
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{
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  NS_LOG_FUNCTION (this);
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}
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void
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DcaTxop::DoDispose (void)
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{
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  NS_LOG_FUNCTION (this);
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  m_queue = 0;
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  m_low = 0;
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  m_stationManager = 0;
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  delete m_transmissionListener;
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  delete m_dcf;
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  delete m_rng;
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  delete m_txMiddle;
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  m_transmissionListener = 0;
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  m_dcf = 0;
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  m_rng = 0;
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  m_txMiddle = 0;
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}
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void
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DcaTxop::SetManager (DcfManager *manager)
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{
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  NS_LOG_FUNCTION (this << manager);
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  m_manager = manager;
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  m_manager->Add (m_dcf);
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}
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void
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DcaTxop::SetLow (Ptr<MacLow> low)
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{
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  NS_LOG_FUNCTION (this << low);
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  m_low = low;
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}
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void
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DcaTxop::SetWifiRemoteStationManager (Ptr<WifiRemoteStationManager> remoteManager)
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{
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  NS_LOG_FUNCTION (this << remoteManager);
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  m_stationManager = remoteManager;
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}
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void
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DcaTxop::SetTxOkCallback (TxOk callback)
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{
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  m_txOkCallback = callback;
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}
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void
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DcaTxop::SetTxFailedCallback (TxFailed callback)
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{
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  m_txFailedCallback = callback;
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}
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Ptr<WifiMacQueue >
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DcaTxop::GetQueue () const
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{
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  NS_LOG_FUNCTION (this);
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  return m_queue;
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}
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void
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DcaTxop::SetMinCw (uint32_t minCw)
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{
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  NS_LOG_FUNCTION (this << minCw);
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  m_dcf->SetCwMin (minCw);
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}
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void
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DcaTxop::SetMaxCw (uint32_t maxCw)
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{
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  NS_LOG_FUNCTION (this << maxCw);
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  m_dcf->SetCwMax (maxCw);
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}
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void
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DcaTxop::SetAifsn (uint32_t aifsn)
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{
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  NS_LOG_FUNCTION (this << aifsn);
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  m_dcf->SetAifsn (aifsn);
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}
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uint32_t
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DcaTxop::GetMinCw (void) const
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{
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  return m_dcf->GetCwMin ();
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}
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uint32_t
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DcaTxop::GetMaxCw (void) const
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{
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  return m_dcf->GetCwMax ();
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}
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uint32_t
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DcaTxop::GetAifsn (void) const
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{
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  return m_dcf->GetAifsn ();
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}
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void
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DcaTxop::Queue (Ptr<const Packet> packet, const WifiMacHeader &hdr)
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{
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  NS_LOG_FUNCTION (this << packet << &hdr);
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  WifiMacTrailer fcs;
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  uint32_t fullPacketSize = hdr.GetSerializedSize () + packet->GetSize () + fcs.GetSerializedSize ();
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  m_stationManager->PrepareForQueue (hdr.GetAddr1 (), &hdr,
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                                     packet, fullPacketSize);
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  m_queue->Enqueue (packet, hdr);
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  StartAccessIfNeeded ();
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}
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int64_t
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DcaTxop::AssignStreams (int64_t stream)
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{
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  NS_LOG_FUNCTION (this << stream);
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  m_rng->AssignStreams (stream);
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  return 1;
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}
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void
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DcaTxop::RestartAccessIfNeeded (void)
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{
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  NS_LOG_FUNCTION (this);
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  if ((m_currentPacket != 0
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       || !m_queue->IsEmpty ())
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      && !m_dcf->IsAccessRequested ())
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    {
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      m_manager->RequestAccess (m_dcf);
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    }
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}
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void
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DcaTxop::StartAccessIfNeeded (void)
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{
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  NS_LOG_FUNCTION (this);
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  if (m_currentPacket == 0
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      && !m_queue->IsEmpty ()
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      && !m_dcf->IsAccessRequested ())
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    {
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      m_manager->RequestAccess (m_dcf);
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    }
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}
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Ptr<MacLow>
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DcaTxop::Low (void)
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{
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  return m_low;
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}
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bool
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DcaTxop::NeedRts (Ptr<const Packet> packet, const WifiMacHeader *header)
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{
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  return m_stationManager->NeedRts (header->GetAddr1 (), header,
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                                    packet);
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}
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void
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DcaTxop::DoStart ()
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{
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  m_dcf->ResetCw ();
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  m_dcf->StartBackoffNow (m_rng->GetNext (0, m_dcf->GetCw ()));
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  ns3::Dcf::DoStart ();
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}
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bool
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DcaTxop::NeedRtsRetransmission (void)
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{
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  return m_stationManager->NeedRtsRetransmission (m_currentHdr.GetAddr1 (), &m_currentHdr,
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                                                  m_currentPacket);
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}
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bool
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   306
DcaTxop::NeedDataRetransmission (void)
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{
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  return m_stationManager->NeedDataRetransmission (m_currentHdr.GetAddr1 (), &m_currentHdr,
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                                                   m_currentPacket);
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}
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bool
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DcaTxop::NeedFragmentation (void)
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{
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   314
  return m_stationManager->NeedFragmentation (m_currentHdr.GetAddr1 (), &m_currentHdr,
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   315
                                              m_currentPacket);
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}
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   318
void
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DcaTxop::NextFragment (void)
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{
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   321
  m_fragmentNumber++;
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   322
}
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   323
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   324
uint32_t
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DcaTxop::GetFragmentSize (void)
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{
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   327
  return m_stationManager->GetFragmentSize (m_currentHdr.GetAddr1 (), &m_currentHdr,
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   328
                                            m_currentPacket, m_fragmentNumber);
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}
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   330
bool
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   331
DcaTxop::IsLastFragment (void)
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   332
{
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   333
  return m_stationManager->IsLastFragment (m_currentHdr.GetAddr1 (), &m_currentHdr,
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   334
                                           m_currentPacket, m_fragmentNumber);
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   335
}
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   336
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   337
uint32_t
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   338
DcaTxop::GetNextFragmentSize (void)
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   339
{
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   340
  return m_stationManager->GetFragmentSize (m_currentHdr.GetAddr1 (), &m_currentHdr,
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   341
                                            m_currentPacket, m_fragmentNumber + 1);
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   342
}
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   343
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   344
uint32_t
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   345
DcaTxop::GetFragmentOffset (void)
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   346
{
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   347
  return m_stationManager->GetFragmentOffset (m_currentHdr.GetAddr1 (), &m_currentHdr,
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   348
                                              m_currentPacket, m_fragmentNumber);
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diff changeset
   349
}
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   350
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   351
Ptr<Packet>
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   352
DcaTxop::GetFragmentPacket (WifiMacHeader *hdr)
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   353
{
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   354
  *hdr = m_currentHdr;
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   355
  hdr->SetFragmentNumber (m_fragmentNumber);
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diff changeset
   356
  uint32_t startOffset = GetFragmentOffset ();
2159
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   357
  Ptr<Packet> fragment;
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diff changeset
   358
  if (IsLastFragment ())
1929
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diff changeset
   359
    {
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   360
      hdr->SetNoMoreFragments ();
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diff changeset
   361
    }
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   362
  else
1929
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diff changeset
   363
    {
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parents:
diff changeset
   364
      hdr->SetMoreFragments ();
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diff changeset
   365
    }
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   366
  fragment = m_currentPacket->CreateFragment (startOffset,
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   367
                                              GetFragmentSize ());
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   368
  return fragment;
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diff changeset
   369
}
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   370
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   371
bool
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diff changeset
   372
DcaTxop::NeedsAccess (void) const
1929
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   373
{
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diff changeset
   374
  return !m_queue->IsEmpty () || m_currentPacket != 0;
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   375
}
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   376
void
2146
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   377
DcaTxop::NotifyAccessGranted (void)
1929
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diff changeset
   378
{
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diff changeset
   379
  NS_LOG_FUNCTION (this);
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diff changeset
   380
  if (m_currentPacket == 0)
1929
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diff changeset
   381
    {
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diff changeset
   382
      if (m_queue->IsEmpty ())
1929
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parents:
diff changeset
   383
        {
5976
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Mirko Banchi <mk.banchi@gmail.com>
parents: 5906
diff changeset
   384
          NS_LOG_DEBUG ("queue empty");
1929
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parents:
diff changeset
   385
          return;
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parents:
diff changeset
   386
        }
2159
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parents: 2146
diff changeset
   387
      m_currentPacket = m_queue->Dequeue (&m_currentHdr);
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diff changeset
   388
      NS_ASSERT (m_currentPacket != 0);
1929
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parents:
diff changeset
   389
      uint16_t sequence = m_txMiddle->GetNextSequenceNumberfor (&m_currentHdr);
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parents:
diff changeset
   390
      m_currentHdr.SetSequenceNumber (sequence);
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parents:
diff changeset
   391
      m_currentHdr.SetFragmentNumber (0);
437bba482899 add DcaTxop to build
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parents:
diff changeset
   392
      m_currentHdr.SetNoMoreFragments ();
2161
f5086fb78018 make sure that the retry bit is correctly initialized
Mathieu Lacage <mathieu.lacage@sophia.inria.fr>
parents: 2159
diff changeset
   393
      m_currentHdr.SetNoRetry ();
1929
437bba482899 add DcaTxop to build
Mathieu Lacage <mathieu.lacage@sophia.inria.fr>
parents:
diff changeset
   394
      m_fragmentNumber = 0;
7141
072fb225b714 run check-style.py on src/wifi
Nicola Baldo <nicola@baldo.biz>
parents: 7013
diff changeset
   395
      NS_LOG_DEBUG ("dequeued size=" << m_currentPacket->GetSize () <<
072fb225b714 run check-style.py on src/wifi
Nicola Baldo <nicola@baldo.biz>
parents: 7013
diff changeset
   396
                    ", to=" << m_currentHdr.GetAddr1 () <<
072fb225b714 run check-style.py on src/wifi
Nicola Baldo <nicola@baldo.biz>
parents: 7013
diff changeset
   397
                    ", seq=" << m_currentHdr.GetSequenceControl ());
1929
437bba482899 add DcaTxop to build
Mathieu Lacage <mathieu.lacage@sophia.inria.fr>
parents:
diff changeset
   398
    }
437bba482899 add DcaTxop to build
Mathieu Lacage <mathieu.lacage@sophia.inria.fr>
parents:
diff changeset
   399
  MacLowTransmissionParameters params;
437bba482899 add DcaTxop to build
Mathieu Lacage <mathieu.lacage@sophia.inria.fr>
parents:
diff changeset
   400
  params.DisableOverrideDurationId ();
4079
210d64d11998 add wifi multicast support. Based on patch by Mauchle Fabian.
Mathieu Lacage <mathieu.lacage@sophia.inria.fr>
parents: 3953
diff changeset
   401
  if (m_currentHdr.GetAddr1 ().IsGroup ())
1929
437bba482899 add DcaTxop to build
Mathieu Lacage <mathieu.lacage@sophia.inria.fr>
parents:
diff changeset
   402
    {
437bba482899 add DcaTxop to build
Mathieu Lacage <mathieu.lacage@sophia.inria.fr>
parents:
diff changeset
   403
      params.DisableRts ();
437bba482899 add DcaTxop to build
Mathieu Lacage <mathieu.lacage@sophia.inria.fr>
parents:
diff changeset
   404
      params.DisableAck ();
437bba482899 add DcaTxop to build
Mathieu Lacage <mathieu.lacage@sophia.inria.fr>
parents:
diff changeset
   405
      params.DisableNextData ();
437bba482899 add DcaTxop to build
Mathieu Lacage <mathieu.lacage@sophia.inria.fr>
parents:
diff changeset
   406
      Low ()->StartTransmission (m_currentPacket,
437bba482899 add DcaTxop to build
Mathieu Lacage <mathieu.lacage@sophia.inria.fr>
parents:
diff changeset
   407
                                 &m_currentHdr,
437bba482899 add DcaTxop to build
Mathieu Lacage <mathieu.lacage@sophia.inria.fr>
parents:
diff changeset
   408
                                 params,
437bba482899 add DcaTxop to build
Mathieu Lacage <mathieu.lacage@sophia.inria.fr>
parents:
diff changeset
   409
                                 m_transmissionListener);
2159
20f882e85b4a port to Ptr<Packet> branch
Mathieu Lacage <mathieu.lacage@sophia.inria.fr>
parents: 2146
diff changeset
   410
      m_currentPacket = 0;
1929
437bba482899 add DcaTxop to build
Mathieu Lacage <mathieu.lacage@sophia.inria.fr>
parents:
diff changeset
   411
      m_dcf->ResetCw ();
2146
40ad60ac9912 replace Dcf with DcfManager
Mathieu Lacage <mathieu.lacage@sophia.inria.fr>
parents: 2094
diff changeset
   412
      m_dcf->StartBackoffNow (m_rng->GetNext (0, m_dcf->GetCw ()));
2911
7d6721a53b51 fix bug reported by Gustavo Carneiro: AP does not reply to ARP request.
Mathieu Lacage <mathieu.lacage@sophia.inria.fr>
parents: 2784
diff changeset
   413
      StartAccessIfNeeded ();
5976
dba5c9b69c3b use NS_LOG_APPEND_CONTEXT instead of MY_DEBUG macro
Mirko Banchi <mk.banchi@gmail.com>
parents: 5906
diff changeset
   414
      NS_LOG_DEBUG ("tx broadcast");
7141
072fb225b714 run check-style.py on src/wifi
Nicola Baldo <nicola@baldo.biz>
parents: 7013
diff changeset
   415
    }
072fb225b714 run check-style.py on src/wifi
Nicola Baldo <nicola@baldo.biz>
parents: 7013
diff changeset
   416
  else
1929
437bba482899 add DcaTxop to build
Mathieu Lacage <mathieu.lacage@sophia.inria.fr>
parents:
diff changeset
   417
    {
437bba482899 add DcaTxop to build
Mathieu Lacage <mathieu.lacage@sophia.inria.fr>
parents:
diff changeset
   418
      params.EnableAck ();
7141
072fb225b714 run check-style.py on src/wifi
Nicola Baldo <nicola@baldo.biz>
parents: 7013
diff changeset
   419
072fb225b714 run check-style.py on src/wifi
Nicola Baldo <nicola@baldo.biz>
parents: 7013
diff changeset
   420
      if (NeedFragmentation ())
1929
437bba482899 add DcaTxop to build
Mathieu Lacage <mathieu.lacage@sophia.inria.fr>
parents:
diff changeset
   421
        {
437bba482899 add DcaTxop to build
Mathieu Lacage <mathieu.lacage@sophia.inria.fr>
parents:
diff changeset
   422
          WifiMacHeader hdr;
2159
20f882e85b4a port to Ptr<Packet> branch
Mathieu Lacage <mathieu.lacage@sophia.inria.fr>
parents: 2146
diff changeset
   423
          Ptr<Packet> fragment = GetFragmentPacket (&hdr);
6068
a2127017ecb4 merge with HEAD
Mathieu Lacage <mathieu.lacage@sophia.inria.fr>
parents: 6065 5999
diff changeset
   424
          if (NeedRts (fragment, &hdr))
5900
c4b8a337fc29 bug 725: wifi fragmentation and RTS cannot be used at the same time
Mathieu Lacage <mathieu.lacage@sophia.inria.fr>
parents: 5189
diff changeset
   425
            {
c4b8a337fc29 bug 725: wifi fragmentation and RTS cannot be used at the same time
Mathieu Lacage <mathieu.lacage@sophia.inria.fr>
parents: 5189
diff changeset
   426
              params.EnableRts ();
c4b8a337fc29 bug 725: wifi fragmentation and RTS cannot be used at the same time
Mathieu Lacage <mathieu.lacage@sophia.inria.fr>
parents: 5189
diff changeset
   427
            }
c4b8a337fc29 bug 725: wifi fragmentation and RTS cannot be used at the same time
Mathieu Lacage <mathieu.lacage@sophia.inria.fr>
parents: 5189
diff changeset
   428
          else
c4b8a337fc29 bug 725: wifi fragmentation and RTS cannot be used at the same time
Mathieu Lacage <mathieu.lacage@sophia.inria.fr>
parents: 5189
diff changeset
   429
            {
c4b8a337fc29 bug 725: wifi fragmentation and RTS cannot be used at the same time
Mathieu Lacage <mathieu.lacage@sophia.inria.fr>
parents: 5189
diff changeset
   430
              params.DisableRts ();
c4b8a337fc29 bug 725: wifi fragmentation and RTS cannot be used at the same time
Mathieu Lacage <mathieu.lacage@sophia.inria.fr>
parents: 5189
diff changeset
   431
            }
7141
072fb225b714 run check-style.py on src/wifi
Nicola Baldo <nicola@baldo.biz>
parents: 7013
diff changeset
   432
          if (IsLastFragment ())
1929
437bba482899 add DcaTxop to build
Mathieu Lacage <mathieu.lacage@sophia.inria.fr>
parents:
diff changeset
   433
            {
7141
072fb225b714 run check-style.py on src/wifi
Nicola Baldo <nicola@baldo.biz>
parents: 7013
diff changeset
   434
              NS_LOG_DEBUG ("fragmenting last fragment size=" << fragment->GetSize ());
1929
437bba482899 add DcaTxop to build
Mathieu Lacage <mathieu.lacage@sophia.inria.fr>
parents:
diff changeset
   435
              params.DisableNextData ();
7141
072fb225b714 run check-style.py on src/wifi
Nicola Baldo <nicola@baldo.biz>
parents: 7013
diff changeset
   436
            }
072fb225b714 run check-style.py on src/wifi
Nicola Baldo <nicola@baldo.biz>
parents: 7013
diff changeset
   437
          else
1929
437bba482899 add DcaTxop to build
Mathieu Lacage <mathieu.lacage@sophia.inria.fr>
parents:
diff changeset
   438
            {
7141
072fb225b714 run check-style.py on src/wifi
Nicola Baldo <nicola@baldo.biz>
parents: 7013
diff changeset
   439
              NS_LOG_DEBUG ("fragmenting size=" << fragment->GetSize ());
1929
437bba482899 add DcaTxop to build
Mathieu Lacage <mathieu.lacage@sophia.inria.fr>
parents:
diff changeset
   440
              params.EnableNextData (GetNextFragmentSize ());
437bba482899 add DcaTxop to build
Mathieu Lacage <mathieu.lacage@sophia.inria.fr>
parents:
diff changeset
   441
            }
7141
072fb225b714 run check-style.py on src/wifi
Nicola Baldo <nicola@baldo.biz>
parents: 7013
diff changeset
   442
          Low ()->StartTransmission (fragment, &hdr, params,
1929
437bba482899 add DcaTxop to build
Mathieu Lacage <mathieu.lacage@sophia.inria.fr>
parents:
diff changeset
   443
                                     m_transmissionListener);
7141
072fb225b714 run check-style.py on src/wifi
Nicola Baldo <nicola@baldo.biz>
parents: 7013
diff changeset
   444
        }
072fb225b714 run check-style.py on src/wifi
Nicola Baldo <nicola@baldo.biz>
parents: 7013
diff changeset
   445
      else
1929
437bba482899 add DcaTxop to build
Mathieu Lacage <mathieu.lacage@sophia.inria.fr>
parents:
diff changeset
   446
        {
7141
072fb225b714 run check-style.py on src/wifi
Nicola Baldo <nicola@baldo.biz>
parents: 7013
diff changeset
   447
          if (NeedRts (m_currentPacket, &m_currentHdr))
1929
437bba482899 add DcaTxop to build
Mathieu Lacage <mathieu.lacage@sophia.inria.fr>
parents:
diff changeset
   448
            {
437bba482899 add DcaTxop to build
Mathieu Lacage <mathieu.lacage@sophia.inria.fr>
parents:
diff changeset
   449
              params.EnableRts ();
5976
dba5c9b69c3b use NS_LOG_APPEND_CONTEXT instead of MY_DEBUG macro
Mirko Banchi <mk.banchi@gmail.com>
parents: 5906
diff changeset
   450
              NS_LOG_DEBUG ("tx unicast rts");
7141
072fb225b714 run check-style.py on src/wifi
Nicola Baldo <nicola@baldo.biz>
parents: 7013
diff changeset
   451
            }
072fb225b714 run check-style.py on src/wifi
Nicola Baldo <nicola@baldo.biz>
parents: 7013
diff changeset
   452
          else
1929
437bba482899 add DcaTxop to build
Mathieu Lacage <mathieu.lacage@sophia.inria.fr>
parents:
diff changeset
   453
            {
437bba482899 add DcaTxop to build
Mathieu Lacage <mathieu.lacage@sophia.inria.fr>
parents:
diff changeset
   454
              params.DisableRts ();
5976
dba5c9b69c3b use NS_LOG_APPEND_CONTEXT instead of MY_DEBUG macro
Mirko Banchi <mk.banchi@gmail.com>
parents: 5906
diff changeset
   455
              NS_LOG_DEBUG ("tx unicast");
1929
437bba482899 add DcaTxop to build
Mathieu Lacage <mathieu.lacage@sophia.inria.fr>
parents:
diff changeset
   456
            }
437bba482899 add DcaTxop to build
Mathieu Lacage <mathieu.lacage@sophia.inria.fr>
parents:
diff changeset
   457
          params.DisableNextData ();
2159
20f882e85b4a port to Ptr<Packet> branch
Mathieu Lacage <mathieu.lacage@sophia.inria.fr>
parents: 2146
diff changeset
   458
          Low ()->StartTransmission (m_currentPacket, &m_currentHdr,
1929
437bba482899 add DcaTxop to build
Mathieu Lacage <mathieu.lacage@sophia.inria.fr>
parents:
diff changeset
   459
                                     params, m_transmissionListener);
437bba482899 add DcaTxop to build
Mathieu Lacage <mathieu.lacage@sophia.inria.fr>
parents:
diff changeset
   460
        }
437bba482899 add DcaTxop to build
Mathieu Lacage <mathieu.lacage@sophia.inria.fr>
parents:
diff changeset
   461
    }
437bba482899 add DcaTxop to build
Mathieu Lacage <mathieu.lacage@sophia.inria.fr>
parents:
diff changeset
   462
}
437bba482899 add DcaTxop to build
Mathieu Lacage <mathieu.lacage@sophia.inria.fr>
parents:
diff changeset
   463
7141
072fb225b714 run check-style.py on src/wifi
Nicola Baldo <nicola@baldo.biz>
parents: 7013
diff changeset
   464
void
2146
40ad60ac9912 replace Dcf with DcfManager
Mathieu Lacage <mathieu.lacage@sophia.inria.fr>
parents: 2094
diff changeset
   465
DcaTxop::NotifyInternalCollision (void)
40ad60ac9912 replace Dcf with DcfManager
Mathieu Lacage <mathieu.lacage@sophia.inria.fr>
parents: 2094
diff changeset
   466
{
2985
fa0747c4ad5e use function logging macros
Mathieu Lacage <mathieu.lacage@sophia.inria.fr>
parents: 2784
diff changeset
   467
  NS_LOG_FUNCTION (this);
2146
40ad60ac9912 replace Dcf with DcfManager
Mathieu Lacage <mathieu.lacage@sophia.inria.fr>
parents: 2094
diff changeset
   468
  NotifyCollision ();
40ad60ac9912 replace Dcf with DcfManager
Mathieu Lacage <mathieu.lacage@sophia.inria.fr>
parents: 2094
diff changeset
   469
}
7141
072fb225b714 run check-style.py on src/wifi
Nicola Baldo <nicola@baldo.biz>
parents: 7013
diff changeset
   470
void
2146
40ad60ac9912 replace Dcf with DcfManager
Mathieu Lacage <mathieu.lacage@sophia.inria.fr>
parents: 2094
diff changeset
   471
DcaTxop::NotifyCollision (void)
40ad60ac9912 replace Dcf with DcfManager
Mathieu Lacage <mathieu.lacage@sophia.inria.fr>
parents: 2094
diff changeset
   472
{
2985
fa0747c4ad5e use function logging macros
Mathieu Lacage <mathieu.lacage@sophia.inria.fr>
parents: 2784
diff changeset
   473
  NS_LOG_FUNCTION (this);
5976
dba5c9b69c3b use NS_LOG_APPEND_CONTEXT instead of MY_DEBUG macro
Mirko Banchi <mk.banchi@gmail.com>
parents: 5906
diff changeset
   474
  NS_LOG_DEBUG ("collision");
2146
40ad60ac9912 replace Dcf with DcfManager
Mathieu Lacage <mathieu.lacage@sophia.inria.fr>
parents: 2094
diff changeset
   475
  m_dcf->StartBackoffNow (m_rng->GetNext (0, m_dcf->GetCw ()));
40ad60ac9912 replace Dcf with DcfManager
Mathieu Lacage <mathieu.lacage@sophia.inria.fr>
parents: 2094
diff changeset
   476
  RestartAccessIfNeeded ();
40ad60ac9912 replace Dcf with DcfManager
Mathieu Lacage <mathieu.lacage@sophia.inria.fr>
parents: 2094
diff changeset
   477
}
1929
437bba482899 add DcaTxop to build
Mathieu Lacage <mathieu.lacage@sophia.inria.fr>
parents:
diff changeset
   478
7141
072fb225b714 run check-style.py on src/wifi
Nicola Baldo <nicola@baldo.biz>
parents: 7013
diff changeset
   479
void
5189
8fcdf87a790a Channel switching support for Wifi
Ramon Bauza
parents: 4720
diff changeset
   480
DcaTxop::NotifyChannelSwitching (void)
8fcdf87a790a Channel switching support for Wifi
Ramon Bauza
parents: 4720
diff changeset
   481
{
7141
072fb225b714 run check-style.py on src/wifi
Nicola Baldo <nicola@baldo.biz>
parents: 7013
diff changeset
   482
  m_queue->Flush ();
5189
8fcdf87a790a Channel switching support for Wifi
Ramon Bauza
parents: 4720
diff changeset
   483
  m_currentPacket = 0;
8fcdf87a790a Channel switching support for Wifi
Ramon Bauza
parents: 4720
diff changeset
   484
}
8fcdf87a790a Channel switching support for Wifi
Ramon Bauza
parents: 4720
diff changeset
   485
7141
072fb225b714 run check-style.py on src/wifi
Nicola Baldo <nicola@baldo.biz>
parents: 7013
diff changeset
   486
void
1929
437bba482899 add DcaTxop to build
Mathieu Lacage <mathieu.lacage@sophia.inria.fr>
parents:
diff changeset
   487
DcaTxop::GotCts (double snr, WifiMode txMode)
437bba482899 add DcaTxop to build
Mathieu Lacage <mathieu.lacage@sophia.inria.fr>
parents:
diff changeset
   488
{
2985
fa0747c4ad5e use function logging macros
Mathieu Lacage <mathieu.lacage@sophia.inria.fr>
parents: 2784
diff changeset
   489
  NS_LOG_FUNCTION (this << snr << txMode);
5976
dba5c9b69c3b use NS_LOG_APPEND_CONTEXT instead of MY_DEBUG macro
Mirko Banchi <mk.banchi@gmail.com>
parents: 5906
diff changeset
   490
  NS_LOG_DEBUG ("got cts");
1929
437bba482899 add DcaTxop to build
Mathieu Lacage <mathieu.lacage@sophia.inria.fr>
parents:
diff changeset
   491
}
7141
072fb225b714 run check-style.py on src/wifi
Nicola Baldo <nicola@baldo.biz>
parents: 7013
diff changeset
   492
void
1929
437bba482899 add DcaTxop to build
Mathieu Lacage <mathieu.lacage@sophia.inria.fr>
parents:
diff changeset
   493
DcaTxop::MissedCts (void)
437bba482899 add DcaTxop to build
Mathieu Lacage <mathieu.lacage@sophia.inria.fr>
parents:
diff changeset
   494
{
2985
fa0747c4ad5e use function logging macros
Mathieu Lacage <mathieu.lacage@sophia.inria.fr>
parents: 2784
diff changeset
   495
  NS_LOG_FUNCTION (this);
5976
dba5c9b69c3b use NS_LOG_APPEND_CONTEXT instead of MY_DEBUG macro
Mirko Banchi <mk.banchi@gmail.com>
parents: 5906
diff changeset
   496
  NS_LOG_DEBUG ("missed cts");
2784
49006cbbfac7 GetMaxSsrc -> NeedRtsTransmission and GetMaxSlrc -> NeedDataRetransmission
Federico Maguolo <maguolof@dei.unipd.it>
parents: 2592
diff changeset
   497
  if (!NeedRtsRetransmission ())
1929
437bba482899 add DcaTxop to build
Mathieu Lacage <mathieu.lacage@sophia.inria.fr>
parents:
diff changeset
   498
    {
5976
dba5c9b69c3b use NS_LOG_APPEND_CONTEXT instead of MY_DEBUG macro
Mirko Banchi <mk.banchi@gmail.com>
parents: 5906
diff changeset
   499
      NS_LOG_DEBUG ("Cts Fail");
6065
0f012e7d9128 bug 602
Mathieu Lacage <mathieu.lacage@sophia.inria.fr>
parents: 5189
diff changeset
   500
      m_stationManager->ReportFinalRtsFailed (m_currentHdr.GetAddr1 (), &m_currentHdr);
7141
072fb225b714 run check-style.py on src/wifi
Nicola Baldo <nicola@baldo.biz>
parents: 7013
diff changeset
   501
      if (!m_txFailedCallback.IsNull ())
3953
4ac29a986eef bug 396: try harder to send ASSOCIATION_RESPONSE frames.
Mathieu Lacage <mathieu.lacage@sophia.inria.fr>
parents: 3745
diff changeset
   502
        {
4ac29a986eef bug 396: try harder to send ASSOCIATION_RESPONSE frames.
Mathieu Lacage <mathieu.lacage@sophia.inria.fr>
parents: 3745
diff changeset
   503
          m_txFailedCallback (m_currentHdr);
4ac29a986eef bug 396: try harder to send ASSOCIATION_RESPONSE frames.
Mathieu Lacage <mathieu.lacage@sophia.inria.fr>
parents: 3745
diff changeset
   504
        }
1929
437bba482899 add DcaTxop to build
Mathieu Lacage <mathieu.lacage@sophia.inria.fr>
parents:
diff changeset
   505
      // to reset the dcf.
2159
20f882e85b4a port to Ptr<Packet> branch
Mathieu Lacage <mathieu.lacage@sophia.inria.fr>
parents: 2146
diff changeset
   506
      m_currentPacket = 0;
1929
437bba482899 add DcaTxop to build
Mathieu Lacage <mathieu.lacage@sophia.inria.fr>
parents:
diff changeset
   507
      m_dcf->ResetCw ();
7141
072fb225b714 run check-style.py on src/wifi
Nicola Baldo <nicola@baldo.biz>
parents: 7013
diff changeset
   508
    }
072fb225b714 run check-style.py on src/wifi
Nicola Baldo <nicola@baldo.biz>
parents: 7013
diff changeset
   509
  else
1929
437bba482899 add DcaTxop to build
Mathieu Lacage <mathieu.lacage@sophia.inria.fr>
parents:
diff changeset
   510
    {
437bba482899 add DcaTxop to build
Mathieu Lacage <mathieu.lacage@sophia.inria.fr>
parents:
diff changeset
   511
      m_dcf->UpdateFailedCw ();
437bba482899 add DcaTxop to build
Mathieu Lacage <mathieu.lacage@sophia.inria.fr>
parents:
diff changeset
   512
    }
2146
40ad60ac9912 replace Dcf with DcfManager
Mathieu Lacage <mathieu.lacage@sophia.inria.fr>
parents: 2094
diff changeset
   513
  m_dcf->StartBackoffNow (m_rng->GetNext (0, m_dcf->GetCw ()));
40ad60ac9912 replace Dcf with DcfManager
Mathieu Lacage <mathieu.lacage@sophia.inria.fr>
parents: 2094
diff changeset
   514
  RestartAccessIfNeeded ();
1929
437bba482899 add DcaTxop to build
Mathieu Lacage <mathieu.lacage@sophia.inria.fr>
parents:
diff changeset
   515
}
7141
072fb225b714 run check-style.py on src/wifi
Nicola Baldo <nicola@baldo.biz>
parents: 7013
diff changeset
   516
void
1929
437bba482899 add DcaTxop to build
Mathieu Lacage <mathieu.lacage@sophia.inria.fr>
parents:
diff changeset
   517
DcaTxop::GotAck (double snr, WifiMode txMode)
437bba482899 add DcaTxop to build
Mathieu Lacage <mathieu.lacage@sophia.inria.fr>
parents:
diff changeset
   518
{
2985
fa0747c4ad5e use function logging macros
Mathieu Lacage <mathieu.lacage@sophia.inria.fr>
parents: 2784
diff changeset
   519
  NS_LOG_FUNCTION (this << snr << txMode);
7141
072fb225b714 run check-style.py on src/wifi
Nicola Baldo <nicola@baldo.biz>
parents: 7013
diff changeset
   520
  if (!NeedFragmentation ()
072fb225b714 run check-style.py on src/wifi
Nicola Baldo <nicola@baldo.biz>
parents: 7013
diff changeset
   521
      || IsLastFragment ())
1929
437bba482899 add DcaTxop to build
Mathieu Lacage <mathieu.lacage@sophia.inria.fr>
parents:
diff changeset
   522
    {
5976
dba5c9b69c3b use NS_LOG_APPEND_CONTEXT instead of MY_DEBUG macro
Mirko Banchi <mk.banchi@gmail.com>
parents: 5906
diff changeset
   523
      NS_LOG_DEBUG ("got ack. tx done.");
7141
072fb225b714 run check-style.py on src/wifi
Nicola Baldo <nicola@baldo.biz>
parents: 7013
diff changeset
   524
      if (!m_txOkCallback.IsNull ())
1929
437bba482899 add DcaTxop to build
Mathieu Lacage <mathieu.lacage@sophia.inria.fr>
parents:
diff changeset
   525
        {
437bba482899 add DcaTxop to build
Mathieu Lacage <mathieu.lacage@sophia.inria.fr>
parents:
diff changeset
   526
          m_txOkCallback (m_currentHdr);
437bba482899 add DcaTxop to build
Mathieu Lacage <mathieu.lacage@sophia.inria.fr>
parents:
diff changeset
   527
        }
437bba482899 add DcaTxop to build
Mathieu Lacage <mathieu.lacage@sophia.inria.fr>
parents:
diff changeset
   528
437bba482899 add DcaTxop to build
Mathieu Lacage <mathieu.lacage@sophia.inria.fr>
parents:
diff changeset
   529
      /* we are not fragmenting or we are done fragmenting
437bba482899 add DcaTxop to build
Mathieu Lacage <mathieu.lacage@sophia.inria.fr>
parents:
diff changeset
   530
       * so we can get rid of that packet now.
437bba482899 add DcaTxop to build
Mathieu Lacage <mathieu.lacage@sophia.inria.fr>
parents:
diff changeset
   531
       */
2159
20f882e85b4a port to Ptr<Packet> branch
Mathieu Lacage <mathieu.lacage@sophia.inria.fr>
parents: 2146
diff changeset
   532
      m_currentPacket = 0;
1929
437bba482899 add DcaTxop to build
Mathieu Lacage <mathieu.lacage@sophia.inria.fr>
parents:
diff changeset
   533
      m_dcf->ResetCw ();
2146
40ad60ac9912 replace Dcf with DcfManager
Mathieu Lacage <mathieu.lacage@sophia.inria.fr>
parents: 2094
diff changeset
   534
      m_dcf->StartBackoffNow (m_rng->GetNext (0, m_dcf->GetCw ()));
40ad60ac9912 replace Dcf with DcfManager
Mathieu Lacage <mathieu.lacage@sophia.inria.fr>
parents: 2094
diff changeset
   535
      RestartAccessIfNeeded ();
7141
072fb225b714 run check-style.py on src/wifi
Nicola Baldo <nicola@baldo.biz>
parents: 7013
diff changeset
   536
    }
072fb225b714 run check-style.py on src/wifi
Nicola Baldo <nicola@baldo.biz>
parents: 7013
diff changeset
   537
  else
1929
437bba482899 add DcaTxop to build
Mathieu Lacage <mathieu.lacage@sophia.inria.fr>
parents:
diff changeset
   538
    {
7141
072fb225b714 run check-style.py on src/wifi
Nicola Baldo <nicola@baldo.biz>
parents: 7013
diff changeset
   539
      NS_LOG_DEBUG ("got ack. tx not done, size=" << m_currentPacket->GetSize ());
1929
437bba482899 add DcaTxop to build
Mathieu Lacage <mathieu.lacage@sophia.inria.fr>
parents:
diff changeset
   540
    }
437bba482899 add DcaTxop to build
Mathieu Lacage <mathieu.lacage@sophia.inria.fr>
parents:
diff changeset
   541
}
7141
072fb225b714 run check-style.py on src/wifi
Nicola Baldo <nicola@baldo.biz>
parents: 7013
diff changeset
   542
void
1929
437bba482899 add DcaTxop to build
Mathieu Lacage <mathieu.lacage@sophia.inria.fr>
parents:
diff changeset
   543
DcaTxop::MissedAck (void)
437bba482899 add DcaTxop to build
Mathieu Lacage <mathieu.lacage@sophia.inria.fr>
parents:
diff changeset
   544
{
2985
fa0747c4ad5e use function logging macros
Mathieu Lacage <mathieu.lacage@sophia.inria.fr>
parents: 2784
diff changeset
   545
  NS_LOG_FUNCTION (this);
5976
dba5c9b69c3b use NS_LOG_APPEND_CONTEXT instead of MY_DEBUG macro
Mirko Banchi <mk.banchi@gmail.com>
parents: 5906
diff changeset
   546
  NS_LOG_DEBUG ("missed ack");
7141
072fb225b714 run check-style.py on src/wifi
Nicola Baldo <nicola@baldo.biz>
parents: 7013
diff changeset
   547
  if (!NeedDataRetransmission ())
1929
437bba482899 add DcaTxop to build
Mathieu Lacage <mathieu.lacage@sophia.inria.fr>
parents:
diff changeset
   548
    {
5976
dba5c9b69c3b use NS_LOG_APPEND_CONTEXT instead of MY_DEBUG macro
Mirko Banchi <mk.banchi@gmail.com>
parents: 5906
diff changeset
   549
      NS_LOG_DEBUG ("Ack Fail");
6065
0f012e7d9128 bug 602
Mathieu Lacage <mathieu.lacage@sophia.inria.fr>
parents: 5189
diff changeset
   550
      m_stationManager->ReportFinalDataFailed (m_currentHdr.GetAddr1 (), &m_currentHdr);
7141
072fb225b714 run check-style.py on src/wifi
Nicola Baldo <nicola@baldo.biz>
parents: 7013
diff changeset
   551
      if (!m_txFailedCallback.IsNull ())
3953
4ac29a986eef bug 396: try harder to send ASSOCIATION_RESPONSE frames.
Mathieu Lacage <mathieu.lacage@sophia.inria.fr>
parents: 3745
diff changeset
   552
        {
4ac29a986eef bug 396: try harder to send ASSOCIATION_RESPONSE frames.
Mathieu Lacage <mathieu.lacage@sophia.inria.fr>
parents: 3745
diff changeset
   553
          m_txFailedCallback (m_currentHdr);
4ac29a986eef bug 396: try harder to send ASSOCIATION_RESPONSE frames.
Mathieu Lacage <mathieu.lacage@sophia.inria.fr>
parents: 3745
diff changeset
   554
        }
4ac29a986eef bug 396: try harder to send ASSOCIATION_RESPONSE frames.
Mathieu Lacage <mathieu.lacage@sophia.inria.fr>
parents: 3745
diff changeset
   555
      // to reset the dcf.
2159
20f882e85b4a port to Ptr<Packet> branch
Mathieu Lacage <mathieu.lacage@sophia.inria.fr>
parents: 2146
diff changeset
   556
      m_currentPacket = 0;
1929
437bba482899 add DcaTxop to build
Mathieu Lacage <mathieu.lacage@sophia.inria.fr>
parents:
diff changeset
   557
      m_dcf->ResetCw ();
7141
072fb225b714 run check-style.py on src/wifi
Nicola Baldo <nicola@baldo.biz>
parents: 7013
diff changeset
   558
    }
072fb225b714 run check-style.py on src/wifi
Nicola Baldo <nicola@baldo.biz>
parents: 7013
diff changeset
   559
  else
1929
437bba482899 add DcaTxop to build
Mathieu Lacage <mathieu.lacage@sophia.inria.fr>
parents:
diff changeset
   560
    {
5976
dba5c9b69c3b use NS_LOG_APPEND_CONTEXT instead of MY_DEBUG macro
Mirko Banchi <mk.banchi@gmail.com>
parents: 5906
diff changeset
   561
      NS_LOG_DEBUG ("Retransmit");
2092
885ebd975e88 set the retry bit and use it to filter duplicates
Mathieu Lacage <mathieu.lacage@sophia.inria.fr>
parents: 2091
diff changeset
   562
      m_currentHdr.SetRetry ();
1929
437bba482899 add DcaTxop to build
Mathieu Lacage <mathieu.lacage@sophia.inria.fr>
parents:
diff changeset
   563
      m_dcf->UpdateFailedCw ();
437bba482899 add DcaTxop to build
Mathieu Lacage <mathieu.lacage@sophia.inria.fr>
parents:
diff changeset
   564
    }
2146
40ad60ac9912 replace Dcf with DcfManager
Mathieu Lacage <mathieu.lacage@sophia.inria.fr>
parents: 2094
diff changeset
   565
  m_dcf->StartBackoffNow (m_rng->GetNext (0, m_dcf->GetCw ()));
40ad60ac9912 replace Dcf with DcfManager
Mathieu Lacage <mathieu.lacage@sophia.inria.fr>
parents: 2094
diff changeset
   566
  RestartAccessIfNeeded ();
1929
437bba482899 add DcaTxop to build
Mathieu Lacage <mathieu.lacage@sophia.inria.fr>
parents:
diff changeset
   567
}
7141
072fb225b714 run check-style.py on src/wifi
Nicola Baldo <nicola@baldo.biz>
parents: 7013
diff changeset
   568
void
1929
437bba482899 add DcaTxop to build
Mathieu Lacage <mathieu.lacage@sophia.inria.fr>
parents:
diff changeset
   569
DcaTxop::StartNext (void)
437bba482899 add DcaTxop to build
Mathieu Lacage <mathieu.lacage@sophia.inria.fr>
parents:
diff changeset
   570
{
2985
fa0747c4ad5e use function logging macros
Mathieu Lacage <mathieu.lacage@sophia.inria.fr>
parents: 2784
diff changeset
   571
  NS_LOG_FUNCTION (this);
5976
dba5c9b69c3b use NS_LOG_APPEND_CONTEXT instead of MY_DEBUG macro
Mirko Banchi <mk.banchi@gmail.com>
parents: 5906
diff changeset
   572
  NS_LOG_DEBUG ("start next packet fragment");
1929
437bba482899 add DcaTxop to build
Mathieu Lacage <mathieu.lacage@sophia.inria.fr>
parents:
diff changeset
   573
  /* this callback is used only for fragments. */
437bba482899 add DcaTxop to build
Mathieu Lacage <mathieu.lacage@sophia.inria.fr>
parents:
diff changeset
   574
  NextFragment ();
437bba482899 add DcaTxop to build
Mathieu Lacage <mathieu.lacage@sophia.inria.fr>
parents:
diff changeset
   575
  WifiMacHeader hdr;
2159
20f882e85b4a port to Ptr<Packet> branch
Mathieu Lacage <mathieu.lacage@sophia.inria.fr>
parents: 2146
diff changeset
   576
  Ptr<Packet> fragment = GetFragmentPacket (&hdr);
1929
437bba482899 add DcaTxop to build
Mathieu Lacage <mathieu.lacage@sophia.inria.fr>
parents:
diff changeset
   577
  MacLowTransmissionParameters params;
437bba482899 add DcaTxop to build
Mathieu Lacage <mathieu.lacage@sophia.inria.fr>
parents:
diff changeset
   578
  params.EnableAck ();
437bba482899 add DcaTxop to build
Mathieu Lacage <mathieu.lacage@sophia.inria.fr>
parents:
diff changeset
   579
  params.DisableRts ();
437bba482899 add DcaTxop to build
Mathieu Lacage <mathieu.lacage@sophia.inria.fr>
parents:
diff changeset
   580
  params.DisableOverrideDurationId ();
7141
072fb225b714 run check-style.py on src/wifi
Nicola Baldo <nicola@baldo.biz>
parents: 7013
diff changeset
   581
  if (IsLastFragment ())
1929
437bba482899 add DcaTxop to build
Mathieu Lacage <mathieu.lacage@sophia.inria.fr>
parents:
diff changeset
   582
    {
437bba482899 add DcaTxop to build
Mathieu Lacage <mathieu.lacage@sophia.inria.fr>
parents:
diff changeset
   583
      params.DisableNextData ();
7141
072fb225b714 run check-style.py on src/wifi
Nicola Baldo <nicola@baldo.biz>
parents: 7013
diff changeset
   584
    }
072fb225b714 run check-style.py on src/wifi
Nicola Baldo <nicola@baldo.biz>
parents: 7013
diff changeset
   585
  else
1929
437bba482899 add DcaTxop to build
Mathieu Lacage <mathieu.lacage@sophia.inria.fr>
parents:
diff changeset
   586
    {
437bba482899 add DcaTxop to build
Mathieu Lacage <mathieu.lacage@sophia.inria.fr>
parents:
diff changeset
   587
      params.EnableNextData (GetNextFragmentSize ());
437bba482899 add DcaTxop to build
Mathieu Lacage <mathieu.lacage@sophia.inria.fr>
parents:
diff changeset
   588
    }
437bba482899 add DcaTxop to build
Mathieu Lacage <mathieu.lacage@sophia.inria.fr>
parents:
diff changeset
   589
  Low ()->StartTransmission (fragment, &hdr, params, m_transmissionListener);
437bba482899 add DcaTxop to build
Mathieu Lacage <mathieu.lacage@sophia.inria.fr>
parents:
diff changeset
   590
}
437bba482899 add DcaTxop to build
Mathieu Lacage <mathieu.lacage@sophia.inria.fr>
parents:
diff changeset
   591
2091
9ef23a8f0980 handle cancel events
Mathieu Lacage <mathieu.lacage@sophia.inria.fr>
parents: 2087
diff changeset
   592
void
9ef23a8f0980 handle cancel events
Mathieu Lacage <mathieu.lacage@sophia.inria.fr>
parents: 2087
diff changeset
   593
DcaTxop::Cancel (void)
9ef23a8f0980 handle cancel events
Mathieu Lacage <mathieu.lacage@sophia.inria.fr>
parents: 2087
diff changeset
   594
{
2985
fa0747c4ad5e use function logging macros
Mathieu Lacage <mathieu.lacage@sophia.inria.fr>
parents: 2784
diff changeset
   595
  NS_LOG_FUNCTION (this);
5976
dba5c9b69c3b use NS_LOG_APPEND_CONTEXT instead of MY_DEBUG macro
Mirko Banchi <mk.banchi@gmail.com>
parents: 5906
diff changeset
   596
  NS_LOG_DEBUG ("transmission cancelled");
2091
9ef23a8f0980 handle cancel events
Mathieu Lacage <mathieu.lacage@sophia.inria.fr>
parents: 2087
diff changeset
   597
  /**
2094
ba3caa8ee26d do nothing on cancel and explain why.
Mathieu Lacage <mathieu.lacage@sophia.inria.fr>
parents: 2092
diff changeset
   598
   * This happens in only one case: in an AP, you have two DcaTxop:
ba3caa8ee26d do nothing on cancel and explain why.
Mathieu Lacage <mathieu.lacage@sophia.inria.fr>
parents: 2092
diff changeset
   599
   *   - one is used exclusively for beacons and has a high priority.
ba3caa8ee26d do nothing on cancel and explain why.
Mathieu Lacage <mathieu.lacage@sophia.inria.fr>
parents: 2092
diff changeset
   600
   *   - the other is used for everything else and has a normal
ba3caa8ee26d do nothing on cancel and explain why.
Mathieu Lacage <mathieu.lacage@sophia.inria.fr>
parents: 2092
diff changeset
   601
   *     priority.
ba3caa8ee26d do nothing on cancel and explain why.
Mathieu Lacage <mathieu.lacage@sophia.inria.fr>
parents: 2092
diff changeset
   602
   *
7141
072fb225b714 run check-style.py on src/wifi
Nicola Baldo <nicola@baldo.biz>
parents: 7013
diff changeset
   603
   * If the normal queue tries to send a unicast data frame, but
2094
ba3caa8ee26d do nothing on cancel and explain why.
Mathieu Lacage <mathieu.lacage@sophia.inria.fr>
parents: 2092
diff changeset
   604
   * if the tx fails (ack timeout), it starts a backoff. If the beacon
ba3caa8ee26d do nothing on cancel and explain why.
Mathieu Lacage <mathieu.lacage@sophia.inria.fr>
parents: 2092
diff changeset
   605
   * queue gets a tx oportunity during this backoff, it will trigger
ba3caa8ee26d do nothing on cancel and explain why.
Mathieu Lacage <mathieu.lacage@sophia.inria.fr>
parents: 2092
diff changeset
   606
   * a call to this Cancel function.
ba3caa8ee26d do nothing on cancel and explain why.
Mathieu Lacage <mathieu.lacage@sophia.inria.fr>
parents: 2092
diff changeset
   607
   *
2146
40ad60ac9912 replace Dcf with DcfManager
Mathieu Lacage <mathieu.lacage@sophia.inria.fr>
parents: 2094
diff changeset
   608
   * Since we are already doing a backoff, we will get access to
7141
072fb225b714 run check-style.py on src/wifi
Nicola Baldo <nicola@baldo.biz>
parents: 7013
diff changeset
   609
   * the medium when we can, we have nothing to do here. We just
072fb225b714 run check-style.py on src/wifi
Nicola Baldo <nicola@baldo.biz>
parents: 7013
diff changeset
   610
   * ignore the cancel event and wait until we are given again a
2094
ba3caa8ee26d do nothing on cancel and explain why.
Mathieu Lacage <mathieu.lacage@sophia.inria.fr>
parents: 2092
diff changeset
   611
   * tx oportunity.
ba3caa8ee26d do nothing on cancel and explain why.
Mathieu Lacage <mathieu.lacage@sophia.inria.fr>
parents: 2092
diff changeset
   612
   *
ba3caa8ee26d do nothing on cancel and explain why.
Mathieu Lacage <mathieu.lacage@sophia.inria.fr>
parents: 2092
diff changeset
   613
   * Note that this is really non-trivial because each of these
7141
072fb225b714 run check-style.py on src/wifi
Nicola Baldo <nicola@baldo.biz>
parents: 7013
diff changeset
   614
   * frames is assigned a sequence number from the same sequence
2094
ba3caa8ee26d do nothing on cancel and explain why.
Mathieu Lacage <mathieu.lacage@sophia.inria.fr>
parents: 2092
diff changeset
   615
   * counter (because this is a non-802.11e device) so, the scheme
ba3caa8ee26d do nothing on cancel and explain why.
Mathieu Lacage <mathieu.lacage@sophia.inria.fr>
parents: 2092
diff changeset
   616
   * described here fails to ensure in-order delivery of frames
ba3caa8ee26d do nothing on cancel and explain why.
Mathieu Lacage <mathieu.lacage@sophia.inria.fr>
parents: 2092
diff changeset
   617
   * at the receiving side. This, however, does not matter in
ba3caa8ee26d do nothing on cancel and explain why.
Mathieu Lacage <mathieu.lacage@sophia.inria.fr>
parents: 2092
diff changeset
   618
   * this case because we assume that the receiving side does not
ba3caa8ee26d do nothing on cancel and explain why.
Mathieu Lacage <mathieu.lacage@sophia.inria.fr>
parents: 2092
diff changeset
   619
   * update its <seq,ad> tupple for packets whose destination
ba3caa8ee26d do nothing on cancel and explain why.
Mathieu Lacage <mathieu.lacage@sophia.inria.fr>
parents: 2092
diff changeset
   620
   * address is a broadcast address.
2091
9ef23a8f0980 handle cancel events
Mathieu Lacage <mathieu.lacage@sophia.inria.fr>
parents: 2087
diff changeset
   621
   */
9ef23a8f0980 handle cancel events
Mathieu Lacage <mathieu.lacage@sophia.inria.fr>
parents: 2087
diff changeset
   622
}
9ef23a8f0980 handle cancel events
Mathieu Lacage <mathieu.lacage@sophia.inria.fr>
parents: 2087
diff changeset
   623
1929
437bba482899 add DcaTxop to build
Mathieu Lacage <mathieu.lacage@sophia.inria.fr>
parents:
diff changeset
   624
} // namespace ns3