peer-management-protocol.h

Go to the documentation of this file.

/* -*- Mode:C++; c-file-style:"gnu"; indent-tabs-mode:nil; -*- */
/*
 * Copyright (c) 2008,2009 IITP RAS
 *
 * 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
 *
 * Authors: Kirill Andreev <andreev@iitp.ru>
 *          Aleksey Kovalenko <kovalenko@iitp.ru>
 */

#ifndef DOT11S_PEER_MAN_H
#define DOT11S_PEER_MAN_H

#include "ns3/mac48-address.h"
#include "ns3/net-device.h"
#include "ns3/event-id.h"
#include "ns3/nstime.h"
#include "ns3/traced-value.h"
#include "ie-dot11s-beacon-timing.h"
#include "ie-dot11s-peer-management.h"
#include "peer-link.h"

#include <map>
namespace ns3 {
class MeshPointDevice;
class UniformRandomVariable;
namespace dot11s {
class PeerManagementProtocolMac;
class PeerLink;
class IeMeshId;
class IePeerManagement;
class IeConfiguration;
class PeerManagementProtocol : public Object
{
public:
  PeerManagementProtocol ();
  ~PeerManagementProtocol ();
  static TypeId GetTypeId ();
  void DoDispose ();
  bool Install (Ptr<MeshPointDevice>);
  Ptr<IeBeaconTiming> GetBeaconTimingElement (uint32_t interface);
  void ReceiveBeacon (uint32_t interface, Mac48Address peerAddress, Time beaconInterval, Ptr<IeBeaconTiming> beaconTiming);
  // \}
  void ReceivePeerLinkFrame (
    uint32_t interface,
    Mac48Address peerAddress,
    Mac48Address peerMeshPointAddress,
    uint16_t aid,
    IePeerManagement peerManagementElement,
    IeConfiguration meshConfig
    );
  void ConfigurationMismatch (uint32_t interface, Mac48Address peerAddress);
  void TransmissionFailure (uint32_t interface, const Mac48Address peerAddress);
  void TransmissionSuccess (uint32_t interface, const Mac48Address peerAddress);
  bool IsActiveLink (uint32_t interface, Mac48Address peerAddress);
  // \}
  // \{
  void SetPeerLinkStatusCallback (Callback<void, Mac48Address, Mac48Address, uint32_t, bool> cb);
  Ptr<PeerLink> FindPeerLink (uint32_t interface, Mac48Address peerAddress);
  std::vector < Ptr<PeerLink> > GetPeerLinks () const;
  std::vector<Mac48Address> GetPeers (uint32_t interface) const;
  Mac48Address GetAddress ();
  uint8_t GetNumberOfLinks ();
  void SetMeshId (std::string s);
  Ptr<IeMeshId> GetMeshId () const;
  void SetBeaconCollisionAvoidance (bool enable);
  bool GetBeaconCollisionAvoidance () const;
  void NotifyBeaconSent (uint32_t interface, Time beaconInterval);
  void Report (std::ostream &) const;
  void ResetStats ();
  int64_t AssignStreams (int64_t stream);

private:
  virtual void DoInitialize ();
  struct BeaconInfo
  {
    uint16_t aid; //Assoc ID
    Time referenceTbtt; //When one of my station's beacons was put into a beacon queue;
    Time beaconInterval; //Beacon interval of my station;
  };
  typedef std::vector<Ptr<PeerLink> > PeerLinksOnInterface;
  typedef std::map<uint32_t, PeerLinksOnInterface>  PeerLinksMap;
  typedef std::map<Mac48Address, BeaconInfo>  BeaconsOnInterface;
  typedef std::map<uint32_t, BeaconsOnInterface> BeaconInfoMap;
  typedef std::map<uint32_t, Ptr<PeerManagementProtocolMac> > PeerManagementProtocolMacMap;
  // \}
private:
  PeerManagementProtocol& operator= (const PeerManagementProtocol &);
  PeerManagementProtocol (const PeerManagementProtocol &);

  Ptr<PeerLink> InitiateLink (
    uint32_t interface,
    Mac48Address peerAddress,
    Mac48Address peerMeshPointAddress
    );
  bool ShouldSendOpen (uint32_t interface, Mac48Address peerAddress);
  bool ShouldAcceptOpen (uint32_t interface, Mac48Address peerAddress, PmpReasonCode & reasonCode);
  void PeerLinkStatus (uint32_t interface, Mac48Address peerAddress, Mac48Address peerMeshPointAddres, PeerLink::PeerState ostate, PeerLink::PeerState nstate);
  void CheckBeaconCollisions (uint32_t interface);
  void ShiftOwnBeacon (uint32_t interface);
  Time TuToTime (int x);
  int TimeToTu (Time x);
  // \}

  void NotifyLinkOpen (Mac48Address peerMp, Mac48Address peerIface, Mac48Address myIface, uint32_t interface);
  void NotifyLinkClose (Mac48Address peerMp, Mac48Address peerIface, Mac48Address myIface, uint32_t interface);
private:
  PeerManagementProtocolMacMap m_plugins;
  Mac48Address m_address;
  Ptr<IeMeshId> m_meshId;

  uint16_t m_lastAssocId;
  uint16_t m_lastLocalLinkId;
  uint8_t m_maxNumberOfPeerLinks;
  bool m_enableBca;
  uint16_t m_maxBeaconShift;
  std::map<uint32_t, Time> m_lastBeacon;
  std::map<uint32_t, Time> m_beaconInterval;

  PeerLinksMap m_peerLinks;
  Callback <void, Mac48Address, Mac48Address, uint32_t, bool> m_peerStatusCallback;

  typedef TracedCallback <Mac48Address, Mac48Address> LinkEventCallback;
  LinkEventCallback m_linkOpenTraceSrc;
  LinkEventCallback m_linkCloseTraceSrc;

  // \{
  struct Statistics {
    uint16_t linksTotal;
    uint16_t linksOpened;
    uint16_t linksClosed;

    Statistics (uint16_t t = 0);
    void Print (std::ostream & os) const;
  };
  struct Statistics m_stats;
  // \}
  Ptr<UniformRandomVariable> m_beaconShift;
};

} // namespace dot11s
} // namespace ns3
#endif