A Discrete-Event Network Simulator
API
ns3::WifiMacQueue Class Reference

This queue implements the timeout procedure described in (Section 9.19.2.6 "Retransmit procedures" paragraph 6; IEEE 802.11-2012). More...

#include "wifi-mac-queue.h"

+ Inheritance diagram for ns3::WifiMacQueue:
+ Collaboration diagram for ns3::WifiMacQueue:

Public Types

enum  DropPolicy { DROP_NEWEST, DROP_OLDEST }
 drop policy More...
 

Public Member Functions

 WifiMacQueue ()
 
 ~WifiMacQueue ()
 
Ptr< WifiMacQueueItemDequeue (void) override
 Dequeue the packet in the front of the queue. More...
 
Ptr< WifiMacQueueItemDequeue (WifiMacQueue::ConstIterator pos)
 Dequeue the item at position pos in the queue. More...
 
Ptr< WifiMacQueueItemDequeueByAddress (Mac48Address dest)
 Search and return, if present in the queue, the first packet (either Data frame or QoS Data frame) having the receiver address equal to addr. More...
 
Ptr< WifiMacQueueItemDequeueByTid (uint8_t tid)
 Search and return, if present in the queue, the first packet having the TID equal to tid. More...
 
Ptr< WifiMacQueueItemDequeueByTidAndAddress (uint8_t tid, Mac48Address dest)
 Search and return, if present in the queue, the first packet having the address indicated by type equal to addr, and TID equal to tid. More...
 
Ptr< WifiMacQueueItemDequeueFirstAvailable (const Ptr< QosBlockedDestinations > blockedPackets=nullptr)
 Return first available packet for transmission. More...
 
bool Enqueue (Ptr< WifiMacQueueItem > item) override
 Enqueue the given Wifi MAC queue item at the end of the queue. More...
 
Time GetMaxDelay (void) const
 Return the maximum delay before the packet is discarded. More...
 
uint32_t GetNBytes (uint8_t tid, Mac48Address dest) const
 Return the number of bytes in the queue having tid equal to tid and destination address equal to dest. More...
 
uint32_t GetNBytes (void)
 
uint32_t GetNPackets (uint8_t tid, Mac48Address dest) const
 Return the number of QoS packets in the queue having tid equal to tid and destination address equal to dest. More...
 
uint32_t GetNPackets (void)
 
uint32_t GetNPacketsByAddress (Mac48Address dest)
 Return the number of packets having destination address specified by dest. More...
 
uint32_t GetNPacketsByTidAndAddress (uint8_t tid, Mac48Address dest)
 Return the number of QoS packets having TID equal to tid and destination address equal to dest. More...
 
bool Insert (ConstIterator pos, Ptr< WifiMacQueueItem > item)
 Enqueue the given Wifi MAC queue item before the given position. More...
 
bool IsEmpty (void)
 
Ptr< const WifiMacQueueItemPeek (void) const override
 Peek the packet in the front of the queue. More...
 
ConstIterator PeekByAddress (Mac48Address dest, ConstIterator pos=EMPTY) const
 Search and return, if present in the queue, the first packet (either Data frame or QoS Data frame) having the receiver address equal to addr. More...
 
ConstIterator PeekByTid (uint8_t tid, ConstIterator pos=EMPTY) const
 Search and return, if present in the queue, the first packet having the TID equal to tid. More...
 
ConstIterator PeekByTidAndAddress (uint8_t tid, Mac48Address dest, ConstIterator pos=EMPTY) const
 Search and return, if present in the queue, the first packet having the receiver address equal to dest, and TID equal to tid. More...
 
ConstIterator PeekFirstAvailable (const Ptr< QosBlockedDestinations > blockedPackets=nullptr, ConstIterator pos=EMPTY) const
 Return first available packet for transmission. More...
 
bool PushFront (Ptr< WifiMacQueueItem > item)
 Enqueue the given Wifi MAC queue item at the front of the queue. More...
 
Ptr< WifiMacQueueItemRemove (void) override
 Remove the packet in the front of the queue. More...
 
bool Remove (Ptr< const Packet > packet)
 If exists, removes packet from queue and returns true. More...
 
ConstIterator Remove (ConstIterator pos, bool removeExpired=false)
 Remove the item at position pos in the queue and return an iterator pointing to the item following the removed one. More...
 
void SetMaxDelay (Time delay)
 Set the maximum delay before the packet is discarded. More...
 

Static Public Member Functions

static TypeId GetTypeId (void)
 Get the type ID. More...
 

Static Public Attributes

static const ConstIterator EMPTY = g_emptyWifiMacQueue.end ()
 Invalid iterator to signal an empty queue. More...
 

Private Member Functions

Ptr< WifiMacQueueItemDoDequeue (ConstIterator pos)
 Wrapper for the DoDequeue method provided by the base class that additionally resets the iterator field of the item and updates internal statistics, if an item was dequeued. More...
 
bool DoEnqueue (ConstIterator pos, Ptr< WifiMacQueueItem > item)
 Wrapper for the DoEnqueue method provided by the base class that additionally sets the iterator field of the item and updates internal statistics, if insertion succeeded. More...
 
Ptr< WifiMacQueueItemDoRemove (ConstIterator pos)
 Wrapper for the DoRemove method provided by the base class that additionally resets the iterator field of the item and updates internal statistics, if an item was dropped. More...
 
bool TtlExceeded (ConstIterator &it)
 Remove the item pointed to by the iterator it if it has been in the queue for too long. More...
 

Private Attributes

DropPolicy m_dropPolicy
 Drop behavior of queue. More...
 
bool m_expiredPacketsPresent
 True if expired packets are in the queue. More...
 
Time m_maxDelay
 Time to live for packets in the queue. More...
 
std::unordered_map< WifiAddressTidPair, uint32_t, WifiAddressTidHashm_nQueuedBytes
 Per (MAC address, TID) pair queued bytes. More...
 
std::unordered_map< WifiAddressTidPair, uint32_t, WifiAddressTidHashm_nQueuedPackets
 Per (MAC address, TID) pair queued packets. More...
 
TracedCallback< Ptr< const WifiMacQueueItem > > m_traceExpired
 Traced callback: fired when a packet is dropped due to lifetime expiration. More...
 
 NS_LOG_TEMPLATE_DECLARE
 redefinition of the log component More...
 

Detailed Description

This queue implements the timeout procedure described in (Section 9.19.2.6 "Retransmit procedures" paragraph 6; IEEE 802.11-2012).


When a packet is received by the MAC, to be sent to the PHY, it is queued in the internal queue after being tagged by the current time.

When a packet is dequeued, the queue checks its timestamp to verify whether or not it should be dropped. If dot11EDCATableMSDULifetime has elapsed, it is dropped. Otherwise, it is returned to the caller.

Config Paths

ns3::WifiMacQueue is accessible through the following paths with Config::Set and Config::Connect:

  • "/NodeList/[i]/DeviceList/[i]/$ns3::WifiNetDevice/Mac/$ns3::RegularWifiMac/Txop/Queue"

Attributes

  • MaxSize: The max queue size
  • MaxDelay: If a packet stays longer than this delay in the queue, it is dropped.
    • Set with class: ns3::TimeValue
    • Underlying type: Time -9.22337e+18ns:+9.22337e+18ns
    • Initial value: +5e+08ns
    • Flags: construct write
  • DropPolicy: Upon enqueue with full queue, drop oldest (DropOldest) or newest (DropNewest) packet
    • Set with class: ns3::EnumValue
    • Underlying type:
    • Initial value: DropNewest
    • Flags: construct write read

TraceSources

  • Expired: MPDU dropped because its lifetime expired.
    Callback signature: ns3::WifiMacQueueItem::TracedCallback

TraceSources defined in parent class ns3::Queue<WifiMacQueueItem>

  • Enqueue: Enqueue a packet in the queue.
    Callback signature: ns3::WifiMacQueueItem::TracedCallback
  • Dequeue: Dequeue a packet from the queue.
    Callback signature: ns3::WifiMacQueueItem::TracedCallback
  • Drop: Drop a packet (for whatever reason).
    Callback signature: ns3::WifiMacQueueItem::TracedCallback
  • DropBeforeEnqueue: Drop a packet before enqueue.
    Callback signature: ns3::WifiMacQueueItem::TracedCallback
  • DropAfterDequeue: Drop a packet after dequeue.
    Callback signature: ns3::WifiMacQueueItem::TracedCallback

TraceSources defined in parent class ns3::QueueBase

Size of this type is 384 bytes (on a 64-bit architecture).

Definition at line 59 of file wifi-mac-queue.h.

Member Enumeration Documentation

◆ DropPolicy

drop policy

Enumerator
DROP_NEWEST 
DROP_OLDEST 

Definition at line 71 of file wifi-mac-queue.h.

Constructor & Destructor Documentation

◆ WifiMacQueue()

ns3::WifiMacQueue::WifiMacQueue ( )

Definition at line 65 of file wifi-mac-queue.cc.

◆ ~WifiMacQueue()

ns3::WifiMacQueue::~WifiMacQueue ( )

Definition at line 71 of file wifi-mac-queue.cc.

References m_nQueuedBytes, m_nQueuedPackets, and NS_LOG_FUNCTION_NOARGS.

Member Function Documentation

◆ Dequeue() [1/2]

Ptr< WifiMacQueueItem > ns3::WifiMacQueue::Dequeue ( void  )
override

Dequeue the packet in the front of the queue.

Returns
the packet

Definition at line 176 of file wifi-mac-queue.cc.

References DoDequeue(), NS_LOG_DEBUG, NS_LOG_FUNCTION, and TtlExceeded().

Referenced by DequeueByAddress(), DequeueByTid(), DequeueByTidAndAddress(), DequeueFirstAvailable(), ns3::FrameExchangeManager::DequeueMpdu(), ns3::HtFrameExchangeManager::DequeuePsdu(), and ns3::FrameExchangeManager::GetFirstFragmentIfNeeded().

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◆ Dequeue() [2/2]

Ptr<WifiMacQueueItem> ns3::WifiMacQueue::Dequeue ( WifiMacQueue::ConstIterator  pos)

Dequeue the item at position pos in the queue.

Return a null pointer if the given iterator is invalid, the queue is empty or the lifetime of the item pointed to by the given iterator is expired.

Parameters
posthe position of the item to be dequeued
Returns
the dequeued item, if any

◆ DequeueByAddress()

Ptr< WifiMacQueueItem > ns3::WifiMacQueue::DequeueByAddress ( Mac48Address  dest)

Search and return, if present in the queue, the first packet (either Data frame or QoS Data frame) having the receiver address equal to addr.

This method removes the packet from the queue. It is typically used by ns3::Txop during the CF period.

Parameters
destthe given destination
Returns
the packet

Definition at line 191 of file wifi-mac-queue.cc.

References Dequeue(), NS_LOG_FUNCTION, and PeekByAddress().

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◆ DequeueByTid()

Ptr< WifiMacQueueItem > ns3::WifiMacQueue::DequeueByTid ( uint8_t  tid)

Search and return, if present in the queue, the first packet having the TID equal to tid.

This method removes the packet from the queue.

Parameters
tidthe given TID
Returns
the packet

Definition at line 204 of file wifi-mac-queue.cc.

References Dequeue(), NS_LOG_FUNCTION, and PeekByTid().

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◆ DequeueByTidAndAddress()

Ptr< WifiMacQueueItem > ns3::WifiMacQueue::DequeueByTidAndAddress ( uint8_t  tid,
Mac48Address  dest 
)

Search and return, if present in the queue, the first packet having the address indicated by type equal to addr, and TID equal to tid.

This method removes the packet from the queue. It is typically used by ns3::QosTxop in order to perform correct MSDU aggregation (A-MSDU).

Parameters
tidthe given TID
destthe given destination
Returns
the packet

Definition at line 217 of file wifi-mac-queue.cc.

References Dequeue(), NS_LOG_FUNCTION, and PeekByTidAndAddress().

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◆ DequeueFirstAvailable()

Ptr< WifiMacQueueItem > ns3::WifiMacQueue::DequeueFirstAvailable ( const Ptr< QosBlockedDestinations blockedPackets = nullptr)

Return first available packet for transmission.

A packet could be no available if it is a QoS packet with a TID and an address1 fields equal to tid and addr respectively that index a pending agreement in the BlockAckManager object. So that packet must not be transmitted until reception of an ADDBA response frame from station addressed by addr. This method removes the packet from queue.

Parameters
blockedPacketsthe destination address & TID pairs that are waiting for a BlockAck response
Returns
the packet

Definition at line 230 of file wifi-mac-queue.cc.

References Dequeue(), NS_LOG_FUNCTION, and PeekFirstAvailable().

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◆ DoDequeue()

Ptr< WifiMacQueueItem > ns3::WifiMacQueue::DoDequeue ( ConstIterator  pos)
private

Wrapper for the DoDequeue method provided by the base class that additionally resets the iterator field of the item and updates internal statistics, if an item was dequeued.

Parameters
posthe position of the item to dequeue
Returns
the item.

Definition at line 624 of file wifi-mac-queue.cc.

References ns3::Queue< Item >::DoDequeue(), ns3::WifiMacHeader::GetAddr1(), ns3::WifiMacQueueItem::GetHeader(), ns3::WifiMacHeader::GetQosTid(), ns3::WifiMacQueueItem::GetSize(), ns3::WifiMacHeader::IsQosData(), m_nQueuedBytes, m_nQueuedPackets, ns3::WifiMacQueueItem::m_queueIts, and NS_ASSERT.

Referenced by Dequeue().

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◆ DoEnqueue()

bool ns3::WifiMacQueue::DoEnqueue ( ConstIterator  pos,
Ptr< WifiMacQueueItem item 
)
private

Wrapper for the DoEnqueue method provided by the base class that additionally sets the iterator field of the item and updates internal statistics, if insertion succeeded.

Parameters
posthe position before where the item will be inserted
itemthe item to enqueue
Returns
true if success, false if the packet has been dropped.

Definition at line 598 of file wifi-mac-queue.cc.

References ns3::WifiMacHeader::GetAddr1(), ns3::WifiMacQueueItem::GetHeader(), ns3::WifiMacHeader::GetQosTid(), ns3::WifiMacQueueItem::GetSize(), ns3::WifiMacHeader::IsQosData(), m_nQueuedBytes, m_nQueuedPackets, and ns3::WifiMacQueueItem::m_queueIts.

Referenced by Insert().

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◆ DoRemove()

Ptr< WifiMacQueueItem > ns3::WifiMacQueue::DoRemove ( ConstIterator  pos)
private

Wrapper for the DoRemove method provided by the base class that additionally resets the iterator field of the item and updates internal statistics, if an item was dropped.

Parameters
posthe position of the item to drop
Returns
the item.

Definition at line 649 of file wifi-mac-queue.cc.

References ns3::Queue< Item >::DoRemove(), ns3::WifiMacHeader::GetAddr1(), ns3::WifiMacQueueItem::GetHeader(), ns3::WifiMacHeader::GetQosTid(), ns3::WifiMacQueueItem::GetSize(), ns3::WifiMacHeader::IsQosData(), m_nQueuedBytes, m_nQueuedPackets, ns3::WifiMacQueueItem::m_queueIts, and NS_ASSERT.

Referenced by Insert(), Remove(), and TtlExceeded().

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◆ Enqueue()

bool ns3::WifiMacQueue::Enqueue ( Ptr< WifiMacQueueItem item)
override

Enqueue the given Wifi MAC queue item at the end of the queue.

Parameters
itemthe Wifi MAC queue item to be enqueued at the end
Returns
true if success, false if the packet has been dropped

Definition at line 113 of file wifi-mac-queue.cc.

References Insert(), and NS_LOG_FUNCTION.

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◆ GetMaxDelay()

Time ns3::WifiMacQueue::GetMaxDelay ( void  ) const

Return the maximum delay before the packet is discarded.

Returns
the maximum delay

Definition at line 90 of file wifi-mac-queue.cc.

References m_maxDelay.

◆ GetNBytes() [1/2]

uint32_t ns3::WifiMacQueue::GetNBytes ( uint8_t  tid,
Mac48Address  dest 
) const

Return the number of bytes in the queue having tid equal to tid and destination address equal to dest.

The complexity in the average case is constant. However, packets expired since the last non-const operation on the queue are included in the returned count.

Parameters
tidthe given TID
destthe given destination
Returns
the number of bytes in the queue

Definition at line 586 of file wifi-mac-queue.cc.

References m_nQueuedBytes.

◆ GetNBytes() [2/2]

uint32_t ns3::WifiMacQueue::GetNBytes ( void  )
Returns
The number of bytes currently occupied by the packets in the Queue

Overrides the GetNBytes method provided by QueueBase

Definition at line 559 of file wifi-mac-queue.cc.

References ns3::QueueBase::GetNBytes(), NS_LOG_FUNCTION, and TtlExceeded().

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◆ GetNPackets() [1/2]

uint32_t ns3::WifiMacQueue::GetNPackets ( uint8_t  tid,
Mac48Address  dest 
) const

Return the number of QoS packets in the queue having tid equal to tid and destination address equal to dest.

The complexity in the average case is constant. However, packets expired since the last non-const operation on the queue are included in the returned count.

Parameters
tidthe given TID
destthe given destination
Returns
the number of QoS packets in the queue

Definition at line 574 of file wifi-mac-queue.cc.

References m_nQueuedPackets.

◆ GetNPackets() [2/2]

uint32_t ns3::WifiMacQueue::GetNPackets ( void  )
Returns
The number of packets currently stored in the Queue

Overrides the GetNPackets method provided by QueueBase

Definition at line 544 of file wifi-mac-queue.cc.

References ns3::QueueBase::GetNPackets(), NS_LOG_FUNCTION, and TtlExceeded().

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◆ GetNPacketsByAddress()

uint32_t ns3::WifiMacQueue::GetNPacketsByAddress ( Mac48Address  dest)

Return the number of packets having destination address specified by dest.

The complexity is linear in the size of the queue.

Parameters
destthe given destination
Returns
the number of packets

Definition at line 483 of file wifi-mac-queue.cc.

References NS_LOG_DEBUG, NS_LOG_FUNCTION, and TtlExceeded().

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◆ GetNPacketsByTidAndAddress()

uint32_t ns3::WifiMacQueue::GetNPacketsByTidAndAddress ( uint8_t  tid,
Mac48Address  dest 
)

Return the number of QoS packets having TID equal to tid and destination address equal to dest.

The complexity is linear in the size of the queue.

Parameters
tidthe given TID
destthe given destination
Returns
the number of QoS packets

Definition at line 506 of file wifi-mac-queue.cc.

References NS_LOG_DEBUG, NS_LOG_FUNCTION, and TtlExceeded().

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◆ GetTypeId()

◆ Insert()

bool ns3::WifiMacQueue::Insert ( ConstIterator  pos,
Ptr< WifiMacQueueItem item 
)

Enqueue the given Wifi MAC queue item before the given position.

Parameters
posthe position before which the item is to be inserted
itemthe Wifi MAC queue item to be enqueued
Returns
true if success, false if the packet has been dropped

Definition at line 129 of file wifi-mac-queue.cc.

References DoEnqueue(), DoRemove(), DROP_OLDEST, ns3::QueueBase::GetNPackets(), m_dropPolicy, NS_ASSERT_MSG, NS_LOG_DEBUG, NS_LOG_FUNCTION, ns3::PACKETS, and TtlExceeded().

Referenced by Enqueue(), and PushFront().

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◆ IsEmpty()

bool ns3::WifiMacQueue::IsEmpty ( void  )
Returns
true if the queue is empty; false otherwise

Overrides the IsEmpty method provided by QueueBase

Definition at line 528 of file wifi-mac-queue.cc.

References NS_LOG_DEBUG, NS_LOG_FUNCTION, and TtlExceeded().

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◆ Peek()

Ptr< const WifiMacQueueItem > ns3::WifiMacQueue::Peek ( void  ) const
override

Peek the packet in the front of the queue.

The packet is not removed.

Returns
the packet

Definition at line 282 of file wifi-mac-queue.cc.

References m_expiredPacketsPresent, m_maxDelay, ns3::Simulator::Now(), NS_LOG_DEBUG, and NS_LOG_FUNCTION.

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◆ PeekByAddress()

WifiMacQueue::ConstIterator ns3::WifiMacQueue::PeekByAddress ( Mac48Address  dest,
ConstIterator  pos = EMPTY 
) const

Search and return, if present in the queue, the first packet (either Data frame or QoS Data frame) having the receiver address equal to addr.

If pos is a valid iterator, the search starts from the packet pointed to by the given iterator. This method does not remove the packet from the queue.

Parameters
destthe given destination
posthe iterator pointing to the packet the search starts from
Returns
an iterator pointing to the peeked packet

Definition at line 301 of file wifi-mac-queue.cc.

References EMPTY, m_expiredPacketsPresent, m_maxDelay, ns3::Simulator::Now(), NS_LOG_DEBUG, and NS_LOG_FUNCTION.

Referenced by DequeueByAddress().

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◆ PeekByTid()

WifiMacQueue::ConstIterator ns3::WifiMacQueue::PeekByTid ( uint8_t  tid,
ConstIterator  pos = EMPTY 
) const

Search and return, if present in the queue, the first packet having the TID equal to tid.

If pos is a valid iterator, the search starts from the packet pointed to by the given iterator. This method does not remove the packet from the queue.

Parameters
tidthe given TID
posthe iterator pointing to the packet the search starts from
Returns
an iterator pointing to the peeked packet

Definition at line 329 of file wifi-mac-queue.cc.

References EMPTY, m_expiredPacketsPresent, m_maxDelay, ns3::Simulator::Now(), NS_LOG_DEBUG, and NS_LOG_FUNCTION.

Referenced by DequeueByTid().

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◆ PeekByTidAndAddress()

WifiMacQueue::ConstIterator ns3::WifiMacQueue::PeekByTidAndAddress ( uint8_t  tid,
Mac48Address  dest,
ConstIterator  pos = EMPTY 
) const

Search and return, if present in the queue, the first packet having the receiver address equal to dest, and TID equal to tid.

If pos is a valid iterator, the search starts from the packet pointed to by the given iterator. This method does not remove the packet from the queue. It is typically used by ns3::QosTxop in order to perform correct MSDU aggregation (A-MSDU).

Parameters
tidthe given TID
destthe given destination
posthe iterator pointing to the packet the search starts from
Returns
an iterator pointing to the peeked packet

Definition at line 356 of file wifi-mac-queue.cc.

References EMPTY, m_expiredPacketsPresent, m_maxDelay, ns3::Simulator::Now(), NS_LOG_DEBUG, and NS_LOG_FUNCTION.

Referenced by DequeueByTidAndAddress(), and ns3::QosTxop::PeekNextMpdu().

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◆ PeekFirstAvailable()

WifiMacQueue::ConstIterator ns3::WifiMacQueue::PeekFirstAvailable ( const Ptr< QosBlockedDestinations blockedPackets = nullptr,
ConstIterator  pos = EMPTY 
) const

Return first available packet for transmission.

The packet is not removed from queue.

Parameters
blockedPacketsthe destination address & TID pairs that are waiting for a BlockAck response
posthe iterator pointing to the packet the search starts from
Returns
an iterator pointing to the peeked packet

Definition at line 384 of file wifi-mac-queue.cc.

References EMPTY, m_expiredPacketsPresent, m_maxDelay, ns3::Simulator::Now(), NS_LOG_DEBUG, and NS_LOG_FUNCTION.

Referenced by DequeueFirstAvailable(), and ns3::QosTxop::PeekNextMpdu().

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◆ PushFront()

bool ns3::WifiMacQueue::PushFront ( Ptr< WifiMacQueueItem item)

Enqueue the given Wifi MAC queue item at the front of the queue.

Parameters
itemthe Wifi MAC queue item to be enqueued at the front
Returns
true if success, false if the packet has been dropped

Definition at line 121 of file wifi-mac-queue.cc.

References Insert(), and NS_LOG_FUNCTION.

Referenced by ns3::FrameExchangeManager::GetFirstFragmentIfNeeded().

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◆ Remove() [1/3]

Ptr< WifiMacQueueItem > ns3::WifiMacQueue::Remove ( void  )
override

Remove the packet in the front of the queue.

Returns
the packet

Definition at line 412 of file wifi-mac-queue.cc.

References DoRemove(), NS_LOG_DEBUG, NS_LOG_FUNCTION, and TtlExceeded().

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◆ Remove() [2/3]

bool ns3::WifiMacQueue::Remove ( Ptr< const Packet packet)

If exists, removes packet from queue and returns true.

Otherwise it takes no effects and return false. Deletion of the packet is performed in linear time (O(n)).

Parameters
packetthe packet to be removed
Returns
true if the packet was removed, false otherwise

Definition at line 428 of file wifi-mac-queue.cc.

References DoRemove(), NS_LOG_DEBUG, NS_LOG_FUNCTION, and TtlExceeded().

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◆ Remove() [3/3]

WifiMacQueue::ConstIterator ns3::WifiMacQueue::Remove ( ConstIterator  pos,
bool  removeExpired = false 
)

Remove the item at position pos in the queue and return an iterator pointing to the item following the removed one.

If removeExpired is true, all the items in the queue from the head to the given position are removed if their lifetime expired.

Parameters
posthe position of the item to be removed
removeExpiredtrue to remove expired items
Returns
an iterator pointing to the item following the removed one

Definition at line 449 of file wifi-mac-queue.cc.

References DoRemove(), m_expiredPacketsPresent, NS_LOG_DEBUG, NS_LOG_FUNCTION, and TtlExceeded().

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◆ SetMaxDelay()

void ns3::WifiMacQueue::SetMaxDelay ( Time  delay)

Set the maximum delay before the packet is discarded.

Parameters
delaythe maximum delay

Definition at line 83 of file wifi-mac-queue.cc.

References m_maxDelay, and NS_LOG_FUNCTION.

Referenced by GetTypeId().

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◆ TtlExceeded()

bool ns3::WifiMacQueue::TtlExceeded ( ConstIterator &  it)
private

Remove the item pointed to by the iterator it if it has been in the queue for too long.

If the item is removed, the iterator is updated to point to the item that followed the erased one.

Parameters
itan iterator pointing to the item
Returns
true if the item is removed, false otherwise

Definition at line 96 of file wifi-mac-queue.cc.

References DoRemove(), m_maxDelay, m_traceExpired, ns3::Simulator::Now(), NS_LOG_DEBUG, and NS_LOG_FUNCTION.

Referenced by Dequeue(), GetNBytes(), GetNPackets(), GetNPacketsByAddress(), GetNPacketsByTidAndAddress(), Insert(), IsEmpty(), and Remove().

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Member Data Documentation

◆ EMPTY

const WifiMacQueue::ConstIterator ns3::WifiMacQueue::EMPTY = g_emptyWifiMacQueue.end ()
static

Invalid iterator to signal an empty queue.

Definition at line 330 of file wifi-mac-queue.h.

Referenced by ns3::BlockAckManager::GetBar(), PeekByAddress(), PeekByTid(), PeekByTidAndAddress(), PeekFirstAvailable(), and ns3::QosTxop::PeekNextMpdu().

◆ m_dropPolicy

DropPolicy ns3::WifiMacQueue::m_dropPolicy
private

Drop behavior of queue.

Definition at line 373 of file wifi-mac-queue.h.

Referenced by GetTypeId(), and Insert().

◆ m_expiredPacketsPresent

bool ns3::WifiMacQueue::m_expiredPacketsPresent
mutableprivate

True if expired packets are in the queue.

Definition at line 374 of file wifi-mac-queue.h.

Referenced by Peek(), PeekByAddress(), PeekByTid(), PeekByTidAndAddress(), PeekFirstAvailable(), and Remove().

◆ m_maxDelay

Time ns3::WifiMacQueue::m_maxDelay
private

Time to live for packets in the queue.

Definition at line 372 of file wifi-mac-queue.h.

Referenced by GetMaxDelay(), Peek(), PeekByAddress(), PeekByTid(), PeekByTidAndAddress(), PeekFirstAvailable(), SetMaxDelay(), and TtlExceeded().

◆ m_nQueuedBytes

std::unordered_map<WifiAddressTidPair, uint32_t, WifiAddressTidHash> ns3::WifiMacQueue::m_nQueuedBytes
private

Per (MAC address, TID) pair queued bytes.

Definition at line 379 of file wifi-mac-queue.h.

Referenced by DoDequeue(), DoEnqueue(), DoRemove(), GetNBytes(), and ~WifiMacQueue().

◆ m_nQueuedPackets

std::unordered_map<WifiAddressTidPair, uint32_t, WifiAddressTidHash> ns3::WifiMacQueue::m_nQueuedPackets
private

Per (MAC address, TID) pair queued packets.

Definition at line 377 of file wifi-mac-queue.h.

Referenced by DoDequeue(), DoEnqueue(), DoRemove(), GetNPackets(), and ~WifiMacQueue().

◆ m_traceExpired

TracedCallback<Ptr<const WifiMacQueueItem> > ns3::WifiMacQueue::m_traceExpired
private

Traced callback: fired when a packet is dropped due to lifetime expiration.

Definition at line 382 of file wifi-mac-queue.h.

Referenced by GetTypeId(), and TtlExceeded().

◆ NS_LOG_TEMPLATE_DECLARE

ns3::WifiMacQueue::NS_LOG_TEMPLATE_DECLARE
private

redefinition of the log component

Definition at line 384 of file wifi-mac-queue.h.


The documentation for this class was generated from the following files: