Headers for Block ack response. More...

#include <ctrl-headers.h>

Inheritance diagram for ns3::CtrlBAckResponseHeader:

Collaboration diagram for ns3::CtrlBAckResponseHeader:

Public Member Functions
	CtrlBAckResponseHeader ()
	~CtrlBAckResponseHeader ()
virtual uint32_t	Deserialize (Buffer::Iterator start)
const uint16_t *	GetBitmap (void) const
uint64_t	GetCompressedBitmap (void) const
virtual TypeId	GetInstanceTypeId (void) const
virtual uint32_t	GetSerializedSize (void) const
uint16_t	GetStartingSequence (void) const
uint16_t	GetStartingSequenceControl (void) const
uint8_t	GetTidInfo (void) const
bool	IsBasic (void) const
bool	IsCompressed (void) const
bool	IsFragmentReceived (uint16_t seq, uint8_t frag) const
bool	IsMultiTid (void) const
bool	IsPacketReceived (uint16_t seq) const
bool	MustSendHtImmediateAck (void) const
virtual void	Print (std::ostream &os) const
void	ResetBitmap (void)
virtual void	Serialize (Buffer::Iterator start) const
void	SetHtImmediateAck (bool immeadiateAck)
void	SetReceivedFragment (uint16_t seq, uint8_t frag)
void	SetReceivedPacket (uint16_t seq)
void	SetStartingSequence (uint16_t seq)
void	SetStartingSequenceControl (uint16_t seqControl)
void	SetTidInfo (uint8_t tid)
void	SetType (enum BlockAckType type)
Public Member Functions inherited from ns3::Header
virtual	~Header ()

Static Public Member Functions
static TypeId	GetTypeId (void)
	This method returns the TypeId associated to ns3::CtrlBAckResponseHeader.

Private Member Functions
Buffer::Iterator	DeserializeBitmap (Buffer::Iterator start)
uint16_t	GetBaControl (void) const
uint8_t	IndexInBitmap (uint16_t seq) const
bool	IsInBitmap (uint16_t seq) const
Buffer::Iterator	SerializeBitmap (Buffer::Iterator start) const
void	SetBaControl (uint16_t bar)

Private Attributes
union {
uint16_t m_bitmap [64]
uint64_t m_compressedBitmap
}	bitmap
bool	m_baAckPolicy
bool	m_compressed
bool	m_multiTid
uint16_t	m_startingSeq
uint16_t	m_tidInfo

Additional Inherited Members
Protected Member Functions inherited from ns3::ObjectBase
void	ConstructSelf (const AttributeConstructionList &attributes)
virtual void	NotifyConstructionCompleted (void)

Detailed Description

Headers for Block ack response.

802.11n standard includes three types of block ack:

Basic block ack (unique type in 802.11e)
Compressed block ack
Multi-TID block ack For now only basic block ack and compressed block ack are supported. Basic block ack is also default variant.

Definition at line 102 of file ctrl-headers.h.

Constructor & Destructor Documentation

ns3::CtrlBAckResponseHeader::CtrlBAckResponseHeader ( )

Definition at line 258 of file ctrl-headers.cc.

References bitmap.

ns3::CtrlBAckResponseHeader::~CtrlBAckResponseHeader ( )

Definition at line 266 of file ctrl-headers.cc.

Member Function Documentation

uint32_t ns3::CtrlBAckResponseHeader::Deserialize ( Buffer::Iterator start )

virtual

Parameters

start an iterator which points to where the header should written.

Returns: the number of bytes read.

This method is used by Packet::RemoveHeader to re-create a header from the byte buffer of a packet. The data read is expected to match bit-for-bit the representation of this header in real networks.

Implements ns3::Header.

Definition at line 346 of file ctrl-headers.cc.

References DeserializeBitmap(), ns3::Buffer::Iterator::GetDistanceFrom(), m_compressed, m_multiTid, NS_FATAL_ERROR, ns3::Buffer::Iterator::ReadLsbtohU16(), SetBaControl(), SetStartingSequenceControl(), and visualizer.core::start().

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Buffer::Iterator ns3::CtrlBAckResponseHeader::DeserializeBitmap ( Buffer::Iterator start )

private

Definition at line 521 of file ctrl-headers.cc.

References bitmap, m_compressed, m_multiTid, NS_FATAL_ERROR, ns3::Buffer::Iterator::ReadLsbtohU16(), ns3::Buffer::Iterator::ReadLsbtohU64(), and visualizer.core::start().

Referenced by Deserialize().

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uint16_t ns3::CtrlBAckResponseHeader::GetBaControl ( void ) const

private

Definition at line 448 of file ctrl-headers.cc.

References m_baAckPolicy, m_compressed, m_multiTid, and m_tidInfo.

Referenced by Serialize().

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const uint16_t * ns3::CtrlBAckResponseHeader::GetBitmap ( void ) const

Definition at line 712 of file ctrl-headers.cc.

References bitmap.

uint64_t ns3::CtrlBAckResponseHeader::GetCompressedBitmap ( void ) const

Definition at line 718 of file ctrl-headers.cc.

References bitmap.

Referenced by CtrlBAckResponseHeaderTest::DoRun().

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TypeId ns3::CtrlBAckResponseHeader::GetInstanceTypeId ( void ) const

virtual

Returns: the TypeId associated to the most-derived type of this instance.

This method is typically implemented by ns3::Object::GetInstanceTypeId but some classes which derive from ns3::ObjectBase directly have to implement it themselves.

Implements ns3::ObjectBase.

Definition at line 281 of file ctrl-headers.cc.

References GetTypeId().

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uint32_t ns3::CtrlBAckResponseHeader::GetSerializedSize ( void ) const

virtual

Returns: the expected size of the header.

This method is used by Packet::AddHeader to store a header into the byte buffer of a packet. This method should return the number of bytes which are needed to store the full header data by Serialize.

Implements ns3::Header.

Definition at line 293 of file ctrl-headers.cc.

References m_compressed, m_multiTid, m_tidInfo, and NS_FATAL_ERROR.

Referenced by ns3::MacLow::GetBlockAckSize().

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uint16_t ns3::CtrlBAckResponseHeader::GetStartingSequence ( void ) const

Definition at line 424 of file ctrl-headers.cc.

References m_startingSeq.

Referenced by ns3::BlockAckCache::FillBlockAckBitmap().

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uint16_t ns3::CtrlBAckResponseHeader::GetStartingSequenceControl ( void ) const

Definition at line 477 of file ctrl-headers.cc.

References m_startingSeq.

Referenced by Serialize().

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uint8_t ns3::CtrlBAckResponseHeader::GetTidInfo ( void ) const

Definition at line 417 of file ctrl-headers.cc.

References m_tidInfo.

Referenced by ns3::BlockAckManager::NotifyGotBlockAck().

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TypeId ns3::CtrlBAckResponseHeader::GetTypeId ( void )

static

This method returns the TypeId associated to ns3::CtrlBAckResponseHeader.

No Attributes defined for this type.
No TraceSources defined for this type.

Reimplemented from ns3::Header.

Definition at line 271 of file ctrl-headers.cc.

References ns3::TypeId::SetParent().

Referenced by GetInstanceTypeId().

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uint8_t ns3::CtrlBAckResponseHeader::IndexInBitmap ( uint16_t seq ) const

private

This function is used to correctly index in both bitmap and compressed bitmap, one bit or one block of 16 bits respectively.

for more details see 7.2.1.8 in IEEE 802.11n/D4.00

Parameters

seq	the sequence number

Returns: If we are using basic block ack, return value represents index of block of 16 bits for packet having sequence number equals to seq. If we are using compressed block ack, return value represents bit to set to 1 in the compressed bitmap to indicate that packet having sequence number equals to seq was correctly received.

Definition at line 690 of file ctrl-headers.cc.

References m_startingSeq, and NS_ASSERT.

Referenced by IsFragmentReceived(), IsPacketReceived(), SetReceivedFragment(), and SetReceivedPacket().

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bool ns3::CtrlBAckResponseHeader::IsBasic ( void ) const

Definition at line 430 of file ctrl-headers.cc.

References m_compressed, and m_multiTid.

Referenced by ns3::BlockAckCache::FillBlockAckBitmap(), ns3::BlockAckManager::NotifyGotBlockAck(), and ns3::MacLow::SendBlockAckResponse().

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bool ns3::CtrlBAckResponseHeader::IsCompressed ( void ) const

Definition at line 436 of file ctrl-headers.cc.

References m_compressed, and m_multiTid.

Referenced by ns3::BlockAckCache::FillBlockAckBitmap(), ns3::BlockAckManager::NotifyGotBlockAck(), and ns3::MacLow::SendBlockAckResponse().

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bool ns3::CtrlBAckResponseHeader::IsFragmentReceived	(	uint16_t	seq,
		uint8_t	frag
	)		const

Definition at line 653 of file ctrl-headers.cc.

References bitmap, IndexInBitmap(), IsInBitmap(), m_compressed, m_multiTid, NS_ASSERT, and NS_FATAL_ERROR.

Referenced by ns3::BlockAckManager::NotifyGotBlockAck().

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bool ns3::CtrlBAckResponseHeader::IsInBitmap ( uint16_t seq ) const

private

Checks if sequence number seq can be acknowledged in the bitmap.

Parameters

seq	the sequence number

Returns

Definition at line 706 of file ctrl-headers.cc.

References m_startingSeq.

Referenced by IsFragmentReceived(), IsPacketReceived(), SetReceivedFragment(), and SetReceivedPacket().

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bool ns3::CtrlBAckResponseHeader::IsMultiTid ( void ) const

Definition at line 442 of file ctrl-headers.cc.

References m_compressed, and m_multiTid.

Referenced by ns3::BlockAckCache::FillBlockAckBitmap(), ns3::BlockAckManager::NotifyGotBlockAck(), and ns3::MacLow::SendBlockAckResponse().

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bool ns3::CtrlBAckResponseHeader::IsPacketReceived ( uint16_t seq ) const

Definition at line 619 of file ctrl-headers.cc.

References bitmap, IndexInBitmap(), IsInBitmap(), m_compressed, m_multiTid, and NS_FATAL_ERROR.

Referenced by CtrlBAckResponseHeaderTest::DoRun(), and ns3::BlockAckManager::NotifyGotBlockAck().

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bool ns3::CtrlBAckResponseHeader::MustSendHtImmediateAck ( void ) const

Definition at line 411 of file ctrl-headers.cc.

References m_baAckPolicy.

void ns3::CtrlBAckResponseHeader::Print ( std::ostream & os ) const

virtual

Parameters

os output stream This method is used by Packet::Print to print the content of a trailer as ascii data to a c++ output stream. Although the trailer is free to format its output as it wishes, it is recommended to follow a few rules to integrate with the packet pretty printer: start with flags, small field values located between a pair of parens. Values should be separated by whitespace. Follow the parens with the important fields, separated by whitespace. i.e.: (field1 val1 field2 val2 field3 val3) field4 val4 field5 val5

Implements ns3::Header.

Definition at line 287 of file ctrl-headers.cc.

References m_startingSeq, and m_tidInfo.

void ns3::CtrlBAckResponseHeader::ResetBitmap ( void )

Definition at line 724 of file ctrl-headers.cc.

References bitmap.

Referenced by CtrlBAckResponseHeaderTest::DoRun().

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void ns3::CtrlBAckResponseHeader::Serialize ( Buffer::Iterator start ) const

virtual

Parameters

start an iterator which points to where the header should be written.

This method is used by Packet::AddHeader to store a header into the byte buffer of a packet. The data written is expected to match bit-for-bit the representation of this header in a real network.

Implements ns3::Header.

Definition at line 323 of file ctrl-headers.cc.

References GetBaControl(), GetStartingSequenceControl(), m_compressed, m_multiTid, NS_FATAL_ERROR, SerializeBitmap(), visualizer.core::start(), and ns3::Buffer::Iterator::WriteHtolsbU16().

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Buffer::Iterator ns3::CtrlBAckResponseHeader::SerializeBitmap ( Buffer::Iterator start ) const

private

Definition at line 489 of file ctrl-headers.cc.

References bitmap, m_compressed, m_multiTid, NS_FATAL_ERROR, visualizer.core::start(), ns3::Buffer::Iterator::WriteHtolsbU16(), and ns3::Buffer::Iterator::WriteHtolsbU64().

Referenced by Serialize().

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void ns3::CtrlBAckResponseHeader::SetBaControl ( uint16_t bar )

private

Definition at line 468 of file ctrl-headers.cc.

References m_baAckPolicy, m_compressed, m_multiTid, and m_tidInfo.

Referenced by Deserialize().

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void ns3::CtrlBAckResponseHeader::SetHtImmediateAck ( bool immeadiateAck )

Definition at line 370 of file ctrl-headers.cc.

References m_baAckPolicy.

void ns3::CtrlBAckResponseHeader::SetReceivedFragment	(	uint16_t	seq,
		uint8_t	frag
	)

Definition at line 586 of file ctrl-headers.cc.

References bitmap, IndexInBitmap(), IsInBitmap(), m_compressed, m_multiTid, NS_ASSERT, and NS_FATAL_ERROR.

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void ns3::CtrlBAckResponseHeader::SetReceivedPacket ( uint16_t seq )

Definition at line 553 of file ctrl-headers.cc.

References bitmap, IndexInBitmap(), IsInBitmap(), m_compressed, m_multiTid, and NS_FATAL_ERROR.

Referenced by CtrlBAckResponseHeaderTest::DoRun(), and ns3::BlockAckCache::FillBlockAckBitmap().

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void ns3::CtrlBAckResponseHeader::SetStartingSequence ( uint16_t seq )

Definition at line 405 of file ctrl-headers.cc.

References m_startingSeq.

Referenced by CtrlBAckResponseHeaderTest::DoRun(), and ns3::MacLow::SendBlockAckAfterBlockAckRequest().

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void ns3::CtrlBAckResponseHeader::SetStartingSequenceControl ( uint16_t seqControl )

Definition at line 483 of file ctrl-headers.cc.

References m_startingSeq.

Referenced by Deserialize().

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void ns3::CtrlBAckResponseHeader::SetTidInfo ( uint8_t tid )

Definition at line 399 of file ctrl-headers.cc.

References m_tidInfo.

Referenced by ns3::MacLow::SendBlockAckAfterBlockAckRequest().

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void ns3::CtrlBAckResponseHeader::SetType ( enum BlockAckType type )

Definition at line 376 of file ctrl-headers.cc.

References ns3::BASIC_BLOCK_ACK, ns3::COMPRESSED_BLOCK_ACK, m_compressed, m_multiTid, ns3::MULTI_TID_BLOCK_ACK, and NS_FATAL_ERROR.

Referenced by CtrlBAckResponseHeaderTest::DoRun(), ns3::MacLow::GetBlockAckSize(), and ns3::MacLow::SendBlockAckAfterBlockAckRequest().

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Member Data Documentation

union { ... } ns3::CtrlBAckResponseHeader::bitmap

Referenced by CtrlBAckResponseHeader(), DeserializeBitmap(), GetBitmap(), GetCompressedBitmap(), IsFragmentReceived(), IsPacketReceived(), ResetBitmap(), SerializeBitmap(), SetReceivedFragment(), and SetReceivedPacket().

bool ns3::CtrlBAckResponseHeader::m_baAckPolicy

private

The lsb bit of the BA control field is used only for the HT (High Throughput) delayed block ack configuration. For now only non HT immediate block ack is implemented so this field is here only for a future implementation of HT delayed variant.

Definition at line 176 of file ctrl-headers.h.

Referenced by GetBaControl(), MustSendHtImmediateAck(), SetBaControl(), and SetHtImmediateAck().

uint16_t ns3::CtrlBAckResponseHeader::m_bitmap[64]

Definition at line 184 of file ctrl-headers.h.

bool ns3::CtrlBAckResponseHeader::m_compressed

private

Definition at line 178 of file ctrl-headers.h.

Referenced by Deserialize(), DeserializeBitmap(), GetBaControl(), GetSerializedSize(), IsBasic(), IsCompressed(), IsFragmentReceived(), IsMultiTid(), IsPacketReceived(), Serialize(), SerializeBitmap(), SetBaControl(), SetReceivedFragment(), SetReceivedPacket(), and SetType().