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ie-dot11s-beacon-timing.h
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1 /* -*- Mode:C++; c-file-style:"gnu"; indent-tabs-mode:nil; -*- */
2 /*
3  * Copyright (c) 2008,2009 IITP RAS
4  *
5  * This program is free software; you can redistribute it and/or modify
6  * it under the terms of the GNU General Public License version 2 as
7  * published by the Free Software Foundation;
8  *
9  * This program is distributed in the hope that it will be useful,
10  * but WITHOUT ANY WARRANTY; without even the implied warranty of
11  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
12  * GNU General Public License for more details.
13  *
14  * You should have received a copy of the GNU General Public License
15  * along with this program; if not, write to the Free Software
16  * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
17  *
18  * Author: Kirill Andreev <andreev@iitp.ru>
19  */
20 
21 #ifndef WIFI_TIMING_ELEMENT_H
22 #define WIFI_TIMING_ELEMENT_H
23 
24 #include <vector>
25 #include "ns3/nstime.h"
26 #include "ns3/mesh-information-element-vector.h"
27 
28 namespace ns3 {
29 namespace dot11s {
34 class IeBeaconTimingUnit : public SimpleRefCount<IeBeaconTimingUnit>
35 {
36 public:
38  void SetAid (uint8_t aid);
39  void SetLastBeacon (uint16_t lastBeacon);
40  void SetBeaconInterval (uint16_t beaconInterval);
41 
42  uint8_t GetAid () const;
43  uint16_t GetLastBeacon () const;
44  uint16_t GetBeaconInterval () const;
45 
46 private:
48  uint8_t m_aid;
50  uint16_t m_lastBeacon;
52  uint16_t m_beaconInterval;
53  friend bool operator== (const IeBeaconTimingUnit & a, const IeBeaconTimingUnit & b);
54 };
55 
61 {
62 public:
67  typedef std::vector< Ptr<IeBeaconTimingUnit> > NeighboursTimingUnitsList;
68 
69  IeBeaconTiming ();
76  uint16_t aid,
77  Time last_beacon,
78  Time beacon_interval
79  );
81  uint16_t aid,
82  Time last_beacon,
83  Time beacon_interval
84  );
85  void ClearTimingElement ();
90  virtual WifiInformationElementId ElementId () const;
91  virtual uint8_t GetInformationFieldSize () const;
92  virtual void SerializeInformationField (Buffer::Iterator i) const;
93  virtual uint8_t DeserializeInformationField (Buffer::Iterator i, uint8_t length);
94  virtual void Print (std::ostream& os) const;
96  bool operator== (WifiInformationElement const & a) const;
97 private:
101  static uint16_t TimestampToU16 (Time x);
102  static uint16_t BeaconIntervalToU16 (Time x);
103  static uint8_t AidToU8 (uint16_t x);
104 
109  uint16_t m_numOfUnits;
110 };
111 bool operator== (const IeBeaconTimingUnit & a, const IeBeaconTimingUnit & b);
112 std::ostream &operator << (std::ostream &os, const IeBeaconTiming &beaconTiming);
113 } // namespace dot11s
114 } // namespace ns3
115 #endif
uint8_t m_aid
Least significant octet of AID:
keep track of time values and allow control of global simulation resolution
Definition: nstime.h:81
NeighboursTimingUnitsList m_neighbours
virtual uint8_t DeserializeInformationField(Buffer::Iterator i, uint8_t length)
Deserialize information (i.e., the body of the IE, not including the Element ID and length octets) ...
uint16_t m_lastBeacon
Last time we received a beacon in accordance with a local TSF measured in 256 microseconds unit...
NeighboursTimingUnitsList GetNeighboursTimingElementsList()
This methods are needed for beacon collision avoidance module:
bool operator==(const MeshHeader &a, const MeshHeader &b)
std::vector< Ptr< IeBeaconTimingUnit > > NeighboursTimingUnitsList
This type is a list of timing elements obtained from neighbours with their beacons: ...
iterator in a Buffer instance
Definition: buffer.h:98
void SetBeaconInterval(uint16_t beaconInterval)
Information element, as defined in 802.11-2007 standardThe IEEE 802.11 standard includes the notion o...
static uint16_t BeaconIntervalToU16(Time x)
See 7.3.2.89 of 802.11s draft 2.07.
uint16_t m_numOfUnits
Timing element parameters:
virtual void Print(std::ostream &os) const
In addition, a subclass may optionally override the following...
virtual uint8_t GetInformationFieldSize() const
Length of serialized information (i.e., the length of the body of the IE, not including the Element I...
friend bool operator==(const IeBeaconTimingUnit &a, const IeBeaconTimingUnit &b)
static uint16_t TimestampToU16(Time x)
Converters:
uint16_t m_beaconInterval
Beacon interval of remote mesh point.
virtual WifiInformationElementId ElementId() const
Own unique Element ID.
void DelNeighboursTimingElementUnit(uint16_t aid, Time last_beacon, Time beacon_interval)
uint8_t WifiInformationElementId
This type is used to represent an Information Element ID.
void AddNeighboursTimingElementUnit(uint16_t aid, Time last_beacon, Time beacon_interval)
void SetLastBeacon(uint16_t lastBeacon)
A template-based reference counting class.
std::ostream & operator<<(std::ostream &os, const IeBeaconTiming &a)
virtual void SerializeInformationField(Buffer::Iterator i) const
Serialize information (i.e., the body of the IE, not including the Element ID and length octets) ...
Describes one unit of beacon timing element.
static uint8_t AidToU8(uint16_t x)
bool operator==(WifiInformationElement const &a) const
Compare two IEs for equality by ID & Length, and then through memcmp of serialised version...