A Discrete-Event Network Simulator
API
block-ack-manager.h
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1 /* -*- Mode:C++; c-file-style:"gnu"; indent-tabs-mode:nil; -*- */
2 /*
3  * Copyright (c) 2009, 2010 MIRKO BANCHI
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,
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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: Mirko Banchi <mk.banchi@gmail.com>
19  */
20 
21 #ifndef BLOCK_ACK_MANAGER_H
22 #define BLOCK_ACK_MANAGER_H
23 
24 #include <map>
25 #include "ns3/nstime.h"
26 #include "ns3/traced-callback.h"
27 #include "wifi-mac-header.h"
29 #include "block-ack-type.h"
30 #include "wifi-mac-queue-item.h"
31 
32 namespace ns3 {
33 
34 class WifiRemoteStationManager;
35 class MgtAddBaResponseHeader;
36 class MgtAddBaRequestHeader;
37 class CtrlBAckResponseHeader;
38 class CtrlBAckRequestHeader;
39 class MacTxMiddle;
40 class WifiMacQueue;
41 class WifiMode;
42 class Packet;
43 
49 struct Bar
50 {
51  Bar ();
59  Bar (Ptr<const WifiMacQueueItem> bar, uint8_t tid, bool skipIfNoDataQueued = false);
61  uint8_t tid;
63 };
64 
65 
70 class BlockAckManager : public Object
71 {
72 private:
81 
82 
83 public:
88  static TypeId GetTypeId (void);
89 
90  BlockAckManager ();
92 
108  bool ExistsAgreement (Mac48Address recipient, uint8_t tid) const;
119  bool ExistsAgreementInState (Mac48Address recipient, uint8_t tid,
128  void CreateAgreement (const MgtAddBaRequestHeader *reqHdr, Mac48Address recipient);
136  void DestroyAgreement (Mac48Address recipient, uint8_t tid);
143  void UpdateAgreement (const MgtAddBaResponseHeader *respHdr, Mac48Address recipient);
158  Ptr<const WifiMacQueueItem> GetBar (bool remove = true);
166  bool HasPackets (void);
197  void NotifyGotBlockAck (const CtrlBAckResponseHeader *blockAck, Mac48Address recipient, double rxSnr, WifiMode txMode, double dataSnr);
206  void NotifyMissedBlockAck (Mac48Address recipient, uint8_t tid);
215  void DiscardOutstandingMpdus (Mac48Address recipient, uint8_t tid);
225  uint32_t GetNBufferedPackets (Mac48Address recipient, uint8_t tid) const;
234  void NotifyAgreementEstablished (Mac48Address recipient, uint8_t tid, uint16_t startingSeq);
243  void NotifyAgreementRejected (Mac48Address recipient, uint8_t tid);
252  void NotifyAgreementNoReply (Mac48Address recipient, uint8_t tid);
259  void NotifyAgreementReset (Mac48Address recipient, uint8_t tid);
266  void SetBlockAckThreshold (uint8_t nPackets);
273 
277  void SetQueue (const Ptr<WifiMacQueue> queue);
282  void SetTxMiddle (const Ptr<MacTxMiddle> txMiddle);
283 
289  void SetBlockAckType (BlockAckType bAckType);
290 
306 
320  bool SwitchToBlockAckIfNeeded (Mac48Address recipient, uint8_t tid, uint16_t startingSeq);
331  bool NeedBarRetransmission (uint8_t tid, Mac48Address recipient);
340  uint16_t GetRecipientBufferSize (Mac48Address recipient, uint8_t tid) const;
349  uint16_t GetOriginatorStartingSequence (Mac48Address recipient, uint8_t tid) const;
350 
365  void SetTxOkCallback (TxOk callback);
370  void SetTxFailedCallback (TxFailed callback);
371 
380  typedef void (* AgreementStateTracedCallback)(Time now, Mac48Address recipient, uint8_t tid, OriginatorBlockAckAgreement::State state);
381 
393 
401  CtrlBAckRequestHeader GetBlockAckReqHeader (Mac48Address recipient, uint8_t tid) const;
402 
412  void ScheduleBar (Ptr<const WifiMacQueueItem> bar, bool skipIfNoDataQueued = false);
413 
414 private:
420  void InactivityTimeout (Mac48Address recipient, uint8_t tid);
421 
432  void RemoveOldPackets (Mac48Address recipient, uint8_t tid, uint16_t startingSeq);
433 
437  typedef std::list<Ptr<WifiMacQueueItem>> PacketQueue;
441  typedef std::list<Ptr<WifiMacQueueItem>>::iterator PacketQueueI;
445  typedef std::list<Ptr<WifiMacQueueItem>>::const_iterator PacketQueueCI;
449  typedef std::map<std::pair<Mac48Address, uint8_t>,
450  std::pair<OriginatorBlockAckAgreement, PacketQueue> > Agreements;
454  typedef std::map<std::pair<Mac48Address, uint8_t>,
455  std::pair<OriginatorBlockAckAgreement, PacketQueue> >::iterator AgreementsI;
459  typedef std::map<std::pair<Mac48Address, uint8_t>,
460  std::pair<OriginatorBlockAckAgreement, PacketQueue> >::const_iterator AgreementsCI;
461 
469 
478  void RemoveFromRetryQueue (Mac48Address address, uint8_t tid, uint16_t seq);
479 
489  void RemoveFromRetryQueue (Mac48Address address, uint8_t tid, uint16_t startSeq, uint16_t endSeq);
490 
498 
505  std::list<Bar> m_bars;
506 
518 
523 };
524 
525 } //namespace ns3
526 
527 #endif /* BLOCK_ACK_MANAGER_H */
std::map< std::pair< Mac48Address, uint8_t >, std::pair< OriginatorBlockAckAgreement, PacketQueue > > Agreements
typedef for a map between MAC address and block ack agreement.
void SetUnblockDestinationCallback(Callback< void, Mac48Address, uint8_t > callback)
Set unblock destination callback.
Simulation virtual time values and global simulation resolution.
Definition: nstime.h:102
void NotifyGotBlockAck(const CtrlBAckResponseHeader *blockAck, Mac48Address recipient, double rxSnr, WifiMode txMode, double dataSnr)
Smart pointer class similar to boost::intrusive_ptr.
Definition: ptr.h:73
Callback template class.
Definition: callback.h:1273
void NotifyMissedBlockAck(Mac48Address recipient, uint8_t tid)
void RemoveOldPackets(Mac48Address recipient, uint8_t tid, uint16_t startingSeq)
Remove packets from the retransmit queue and from the queue of outstanding packets that become old af...
std::list< Ptr< WifiMacQueueItem > >::iterator PacketQueueI
typedef for an iterator for PacketQueue.
std::map< std::pair< Mac48Address, uint8_t >, std::pair< OriginatorBlockAckAgreement, PacketQueue > >::const_iterator AgreementsCI
typedef for a const iterator for Agreements.
void CreateAgreement(const MgtAddBaRequestHeader *reqHdr, Mac48Address recipient)
uint32_t GetNBufferedPackets(Mac48Address recipient, uint8_t tid) const
void ScheduleBar(Ptr< const WifiMacQueueItem > bar, bool skipIfNoDataQueued=false)
TracedCallback< Time, Mac48Address, uint8_t, OriginatorBlockAckAgreement::State > m_agreementState
The trace source fired when a state transition occurred.
uint8_t m_blockAckThreshold
block ack threshold
Agreements m_agreements
This data structure contains, for each block ack agreement (recipient, TID), a set of packets for whi...
Forward calls to a chain of Callback.
void NotifyMissedAck(Ptr< WifiMacQueueItem > mpdu)
Invoked upon missed reception of an Ack frame after the transmission of a QoS data frame sent under a...
Implement the header for management frames of type Add Block Ack request.
Definition: mgt-headers.h:1003
std::map< std::pair< Mac48Address, uint8_t >, std::pair< OriginatorBlockAckAgreement, PacketQueue > >::iterator AgreementsI
typedef for an iterator for Agreements.
CtrlBAckRequestHeader GetBlockAckReqHeader(Mac48Address recipient, uint8_t tid) const
BlockAckRequest frame information.
represent a single transmission modeA WifiMode is implemented by a single integer which is used to lo...
Definition: wifi-mode.h:97
TxOk m_txOkCallback
transmit OK callback
bool ExistsAgreementInState(Mac48Address recipient, uint8_t tid, OriginatorBlockAckAgreement::State state) const
void RemoveFromRetryQueue(Mac48Address address, uint8_t tid, uint16_t seq)
Remove an item from retransmission queue.
void SetTxFailedCallback(TxFailed callback)
void NotifyDiscardedMpdu(Ptr< const WifiMacQueueItem > mpdu)
Ptr< WifiMacQueue > GetRetransmitQueue(void)
void NotifyAgreementEstablished(Mac48Address recipient, uint8_t tid, uint16_t startingSeq)
void UpdateAgreement(const MgtAddBaResponseHeader *respHdr, Mac48Address recipient)
void SetQueue(const Ptr< WifiMacQueue > queue)
void SetBlockAckType(BlockAckType bAckType)
void SetWifiRemoteStationManager(const Ptr< WifiRemoteStationManager > manager)
Set up WifiRemoteStationManager associated with this BlockAckManager.
static TypeId GetTypeId(void)
Get the type ID.
Headers for BlockAck response.
Definition: ctrl-headers.h:193
void NotifyAgreementRejected(Mac48Address recipient, uint8_t tid)
bool ExistsAgreement(Mac48Address recipient, uint8_t tid) const
std::list< Ptr< WifiMacQueueItem > >::const_iterator PacketQueueCI
typedef for a const iterator for PacketQueue.
Ptr< MacTxMiddle > m_txMiddle
the MacTxMiddle
void SetBlockDestinationCallback(Callback< void, Mac48Address, uint8_t > callback)
Set block destination callback.
bool NeedBarRetransmission(uint8_t tid, Mac48Address recipient)
This function returns true if a block ack agreement is established with the given recipient for the g...
void DestroyAgreement(Mac48Address recipient, uint8_t tid)
void SetTxOkCallback(TxOk callback)
Ptr< const WifiMacQueueItem > GetBar(bool remove=true)
Returns the next BlockAckRequest to send, if any.
bool HasPackets(void)
Returns true if there are packets that need of retransmission or at least a BAR is scheduled...
uint16_t GetRecipientBufferSize(Mac48Address recipient, uint8_t tid) const
This function returns the buffer size negotiated with the recipient.
void InsertInRetryQueue(Ptr< WifiMacQueueItem > mpdu)
Every class exported by the ns3 library is enclosed in the ns3 namespace.
address
Definition: first.py:44
void InactivityTimeout(Mac48Address recipient, uint8_t tid)
Inactivity timeout function.
Callback< void, Mac48Address, uint8_t, bool > m_blockAckInactivityTimeout
BlockAck inactivity timeout callback.
void NotifyGotAck(Ptr< const WifiMacQueueItem > mpdu)
Invoked upon receipt of an Ack frame after the transmission of a QoS data frame sent under an establi...
void DiscardOutstandingMpdus(Mac48Address recipient, uint8_t tid)
Callback< void, Mac48Address, uint8_t > m_blockPackets
block packets callback
void StorePacket(Ptr< WifiMacQueueItem > mpdu)
Callback< void, const WifiMacHeader & > TxOk
typedef for a callback to invoke when a packet transmission was completed successfully.
an EUI-48 address
Definition: mac48-address.h:43
std::list< Ptr< WifiMacQueueItem > > PacketQueue
typedef for a list of WifiMacQueueItem.
Callback< void, const WifiMacHeader & > TxFailed
typedef for a callback to invoke when a packet transmission was failed.
Ptr< WifiMacQueue > m_retryPackets
This list contains all iterators to stored packets that need to be retransmitted. ...
State
Represents the state for this agreement.
void NotifyAgreementReset(Mac48Address recipient, uint8_t tid)
void SetBlockAckInactivityCallback(Callback< void, Mac48Address, uint8_t, bool > callback)
Set BlockAck inactivity callback.
uint16_t GetOriginatorStartingSequence(Mac48Address recipient, uint8_t tid) const
This function returns the starting sequence number of the transmit window.
bool SwitchToBlockAckIfNeeded(Mac48Address recipient, uint8_t tid, uint16_t startingSeq)
Callback< void, Mac48Address, uint8_t > m_unblockPackets
unblock packets callback
std::list< Bar > m_bars
list of BARs
Ptr< const WifiMacQueueItem > bar
BlockAckRequest.
void SetTxMiddle(const Ptr< MacTxMiddle > txMiddle)
Set the MacTxMiddle.
uint8_t tid
TID.
void SetBlockAckThreshold(uint8_t nPackets)
Implement the header for management frames of type Add Block Ack response.
Definition: mgt-headers.h:1135
BlockAckType m_blockAckType
BlockAck type.
void NotifyAgreementNoReply(Mac48Address recipient, uint8_t tid)
void(* AgreementStateTracedCallback)(Time now, Mac48Address recipient, uint8_t tid, OriginatorBlockAckAgreement::State state)
TracedCallback signature for state changes.
BlockAckManager & operator=(const BlockAckManager &block)
assignment operator
A base class which provides memory management and object aggregation.
Definition: object.h:87
Mac48Address m_address
address
Manages all block ack agreements for an originator station.
Headers for BlockAckRequest.
Definition: ctrl-headers.h:41
TxFailed m_txFailedCallback
transmit failed callback
Ptr< WifiRemoteStationManager > m_stationManager
the station manager
a unique identifier for an interface.
Definition: type-id.h:58
bool skipIfNoDataQueued
do not send if there is no data queued
Ptr< WifiMacQueue > m_queue
queue
BlockAckType
The different block ack policies.