--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/src/devices/wifi/edca-txop-n.h	Fri Apr 24 10:21:37 2009 +0200
@@ -0,0 +1,170 @@
+/* -*-  Mode: C++; c-file-style: "gnu"; indent-tabs-mode:nil; -*- */
+/*
+ * Copyright (c) 2006, 2009 INRIA
+ * 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: Mathieu Lacage <mathieu.lacage@sophia.inria.fr>
+ * Author: Mirko Banchi <mk.banchi@gmail.com>
+ */
+#ifndef EDCA_TXOP_N_H
+#define EDCA_TXOP_N_H
+
+#include "ns3/object.h"
+#include "ns3/mac48-address.h"
+#include "ns3/packet.h"
+
+#include "wifi-mode.h"
+#include "wifi-mac.h"
+#include "wifi-mac-header.h"
+#include "qos-utils.h"
+
+#include <map>
+#include <list>
+
+namespace ns3 {
+
+class DcfState;
+class DcfManager;
+class MacLow;
+class MacTxMiddle;
+class WifiMacParameters;
+class WifiMacQueue;
+class RandomStream;
+class MsduAggregator;
+
+/* This queue contains packets for a particular access class.
+ * possibles access classes are:
+ *   
+ *   -AC_VO : voice, tid = 6,7         ^
+ *   -AC_VI : video, tid = 4,5         |
+ *   -AC_BE : best-effort, tid = 0,3   |  priority  
+ *   -AC_BK : background, tid = 1,2    |
+ * 
+ * For more details see section 9.1.3.1 in 802.11 standard.
+ */
+enum TypeOfStation
+{
+  STA,
+  AP,
+  ADHOC_STA
+};
+
+class EdcaTxopN : public Object
+{
+public:
+
+  typedef Callback <void, WifiMacHeader const&> TxOk;
+  typedef Callback <void, WifiMacHeader const&> TxFailed;
+  
+  static TypeId GetTypeId (void);
+  EdcaTxopN ();
+  virtual ~EdcaTxopN ();
+  void DoDispose ();
+  
+  void SetLow (Ptr<MacLow> low);
+  void SetTxMiddle (MacTxMiddle *txMiddle);
+  void SetManager (DcfManager *manager);
+  void SetTxOkCallback (TxOk callback);
+  void SetTxFailedCallback (TxFailed callback);
+  void SetWifiRemoteStationManager (Ptr<WifiRemoteStationManager> remoteManager);
+  void SetTypeOfStation (enum TypeOfStation type);
+  enum TypeOfStation GetTypeOfStation (void) const;
+
+  void SetMaxQueueSize (uint32_t size);
+  void SetMaxQueueDelay (Time delay);
+  void SetMinCw (uint32_t minCw);
+  void SetMaxCw (uint32_t maxCw);
+  void SetAifsn (uint32_t aifsn);
+  uint32_t GetMinCw (void) const;
+  uint32_t GetMaxCw (void) const;
+  uint32_t GetAifsn (void) const;
+
+  Ptr<MacLow> Low (void);
+  Ptr<MsduAggregator> GetMsduAggregator (void) const;
+
+  /* dcf notifications forwarded here */
+  bool NeedsAccess (void) const;
+  void NotifyAccessGranted (void);
+  void NotifyInternalCollision (void);
+  void NotifyCollision (void);
+
+  /*event handlers*/
+  void GotCts (double snr, WifiMode txMode);
+  void MissedCts (void);
+  void GotAck (double snr, WifiMode txMode);
+  void MissedAck (void);
+  void StartNext (void);
+  void Cancel (void);
+
+  void RestartAccessIfNeeded (void);
+  void StartAccessIfNeeded (void);
+  bool NeedRts (void);
+  bool NeedRtsRetransmission (void);
+  bool NeedDataRetransmission (void);
+  bool NeedFragmentation (void) const;
+  uint32_t GetNextFragmentSize (void);
+  uint32_t GetFragmentSize (void);
+  uint32_t GetFragmentOffset (void);
+  WifiRemoteStation *GetStation (Mac48Address to) const;
+  bool IsLastFragment (void) const;
+  void NextFragment (void);
+  Ptr<Packet> GetFragmentPacket (WifiMacHeader *hdr);
+  
+  void Queue (Ptr<const Packet> packet, WifiMacHeader const &hdr);
+  void SetMsduAggregator (Ptr<MsduAggregator> aggr);
+
+private:
+  /**
+   * This functions are used only to correctly set addresses in a-msdu subframe.
+   * If aggregating sta is a STA (in an infrastructured network):
+   *   SA = Address2
+   *   DA = Address3
+   * If aggregating sta is an AP
+   *   SA = Address3
+   *   DA = Address1
+   */
+  Mac48Address MapSrcAddressForAggregation (WifiMacHeader const &hdr);
+  Mac48Address MapDestAddressForAggregation (WifiMacHeader const &hdr);
+  
+  class Dcf;
+  class TransmissionListener;
+  friend class Dcf;
+  friend class TransmissionListener;
+  Dcf *m_dcf;
+  DcfManager *m_manager;
+  Ptr<WifiMacQueue> m_queue;
+  TxOk m_txOkCallback;
+  TxFailed m_txFailedCallback;
+  Ptr<MacLow> m_low;
+  MacTxMiddle *m_txMiddle;
+  TransmissionListener *m_transmissionListener;
+  RandomStream *m_rng;
+  Ptr<WifiRemoteStationManager> m_stationManager;
+  uint8_t m_fragmentNumber;
+  
+  /* current packet could be a simple MSDU or, if an aggregator for this queue is
+     present, could be an A-MSDU.
+   */
+  Ptr<const Packet> m_currentPacket;
+  
+  WifiMacHeader m_currentHdr;
+  Ptr<MsduAggregator> m_aggregator;
+  TypeOfStation m_typeOfStation;
+};
+
+}  //namespace ns3
+
+#endif /* EDCA_TXOP_N_H */