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

/*

 * Copyright (c) 2005,2006 INRIA

 *

 * 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>

 */

#ifndef MAC_HIGH_NQSTA_H

#define MAC_HIGH_NQSTA_H

#include <stdint.h>

#include "ns3/mac48-address.h"

#include "ns3/callback.h"

#include "ns3/event-id.h"

#include "ns3/packet.h"

#include "ns3/nstime.h"

#include "supported-rates.h"

namespace ns3 {

class WifiMacHeader;

class WifiNetDevice;

class DcaTxop;

class WifiPhy;

class MacStations;

class MacHighNqsta {

public:

  typedef Callback<void, Ptr<Packet>, const Mac48Address &> ForwardCallback;

  typedef Callback<void> AssociatedCallback;

  typedef Callback<void> DisAssociatedCallback;

  MacHighNqsta ();

  ~MacHighNqsta ();

  void SetDcaTxop (DcaTxop *dca);

  void SetDevice (WifiNetDevice *device);

  void SetForwardCallback (ForwardCallback callback);

  void SetAssociatedCallback (AssociatedCallback callback);

  void SetDisAssociatedCallback (DisAssociatedCallback callback);

  void SetPhy (Ptr<WifiPhy> phy);

  void SetStations (MacStations *stations);

  void SetMaxMissedBeacons (uint32_t missed);

  void SetProbeRequestTimeout (Time timeout);

  void SetAssocRequestTimeout (Time timeout);

  Mac48Address GetBssid (void) const;

  void StartActiveAssociation (void);

  void Queue (Ptr<const Packet> packet, Mac48Address to);

  void Receive (Ptr<Packet> packet, WifiMacHeader const *hdr);

private:

  void SetBssid (Mac48Address bssid);

  Mac48Address GetBroadcastBssid (void);

  void SendProbeRequest (void);

  void SendAssociationRequest (void);

  void TryToEnsureAssociated (void);

  void AssocRequestTimeout (void);

  void ProbeRequestTimeout (void);

  bool IsAssociated (void);

  void MissedBeacons (void);

  void RestartBeaconWatchdog (Time delay);

  SupportedRates GetSupportedRates (void) const;

  enum {

    ASSOCIATED,

    WAIT_PROBE_RESP,

    WAIT_ASSOC_RESP,

    BEACON_MISSED,

    REFUSED

  } m_state;

  Time m_probeRequestTimeout;

  Time m_assocRequestTimeout;

  EventId m_probeRequestEvent;

  EventId m_assocRequestEvent;

  WifiNetDevice *m_device;

  ForwardCallback m_forward;

  AssociatedCallback m_associatedCallback;

  DisAssociatedCallback m_disAssociatedCallback;

  DcaTxop *m_dca;

  EventId m_beaconWatchdog;

  Time m_beaconWatchdogEnd;

  Mac48Address m_bssid;

  uint32_t m_maxMissedBeacons;

  Ptr<WifiPhy> m_phy;

  MacStations *m_stations;

};

} // namespace ns3

#endif /* MAC_HIGH_NQSTA_H */