Test the fast retransmission. More...

Inheritance diagram for TcpFastRetrTest:

Public Member Functions
	TcpFastRetrTest (TypeId congControl, uint32_t seqToKill, const std::string &msg)
	Constructor. More...

virtual Ptr< ErrorModel >	CreateReceiverErrorModel ()
	Create and return the error model to install in the receiver node. More...

virtual Ptr< ErrorModel >	CreateSenderErrorModel ()
	Create and return the error model to install in the sender node. More...

virtual Ptr< TcpSocketMsgBase >	CreateSenderSocket (Ptr< Node > node)
	Create and install the socket to install on the sender. More...

Public Member Functions inherited from ns3::TcpGeneralTest
	TcpGeneralTest (const std::string &desc)
	TcpGeneralTest constructor. More...

	~TcpGeneralTest ()

Public Member Functions inherited from ns3::TestCase
virtual	~TestCase ()
	Destructor. More...

std::string	GetName (void) const

Protected Member Functions
virtual void	AfterRTOExpired (const Ptr< const TcpSocketState > tcb, SocketWho who)
	Rto has expired. More...

virtual void	ConfigureEnvironment ()
	Change the configuration of the environment. More...

virtual void	ConfigureProperties ()
	Change the configuration of the socket properties. More...

virtual void	CongStateTrace (const TcpSocketState::TcpCongState_t oldValue, const TcpSocketState::TcpCongState_t newValue)
	State on Ack state machine changes. More...

virtual void	FinalChecks ()
	Performs the (eventual) final checks through test asserts. More...

void	PktDropped (const Ipv4Header &ipH, const TcpHeader &tcpH, Ptr< const Packet > p)
	Check if the packet being dropped is the right one. More...

virtual void	ProcessedAck (const Ptr< const TcpSocketState > tcb, const TcpHeader &h, SocketWho who)
	Processed ack. More...

virtual void	RcvAck (const Ptr< const TcpSocketState > tcb, const TcpHeader &h, SocketWho who)
	Received ack. More...

virtual void	Rx (const Ptr< const Packet > p, const TcpHeader &h, SocketWho who)
	Packet received from IP layer. More...

virtual void	Tx (const Ptr< const Packet > p, const TcpHeader &h, SocketWho who)
	Packet transmitted down to IP layer. More...

Protected Member Functions inherited from ns3::TcpGeneralTest
virtual void	BeforeRTOExpired (const Ptr< const TcpSocketState > tcb, SocketWho who)
	Rto has expired. More...

virtual void	BytesInFlightTrace (uint32_t oldValue, uint32_t newValue)
	Bytes in flight changes. More...

virtual Ptr< SimpleChannel >	CreateChannel ()
	Create and return the channel installed between the two socket. More...

virtual Ptr< TcpSocketMsgBase >	CreateReceiverSocket (Ptr< Node > node)
	Create and install the socket to install on the receiver. More...

virtual Ptr< TcpSocketMsgBase >	CreateSocket (Ptr< Node > node, TypeId socketType, TypeId congControl)
	Create a socket. More...

virtual Ptr< TcpSocketMsgBase >	CreateSocket (Ptr< Node > node, TypeId socketType, TypeId congControl, TypeId recoveryAlgorithm)
	Create a socket. More...

virtual void	CWndInflTrace (uint32_t oldValue, uint32_t newValue)
	Tracks the inflated congestion window changes. More...

virtual void	CWndTrace (uint32_t oldValue, uint32_t newValue)
	Tracks the congestion window changes. More...

virtual void	DataSent (uint32_t size, SocketWho who)
	Notifying application for sent data. More...

void	DoConnect ()
	Scheduled at 0.0, SENDER starts the connection to RECEIVER. More...

virtual void	DoRun (void)
	Execute the tcp test. More...

virtual void	DoTeardown (void)
	Teardown the TCP test. More...

virtual void	ErrorClose (SocketWho who)
	Socket closed with an error. More...

Time	GetClockGranularity (SocketWho who)
	Get the clock granularity attribute. More...

Time	GetConnTimeout (SocketWho who)
	Get the retransmission time for the SYN segments. More...

uint32_t	GetDelAckCount (SocketWho who)
	Get the number of delayed ack (if present) More...

Time	GetDelAckTimeout (SocketWho who)
	Get the timeout of delayed ack (if present) More...

uint32_t	GetDupAckCount (SocketWho who)
	Get the number of dupack received. More...

SequenceNumber32	GetHighestTxMark (SocketWho who)
	Get the highest tx mark of the node specified. More...

uint32_t	GetInitialCwnd (SocketWho who)
	Get the initial congestion window. More...

uint32_t	GetInitialSsThresh (SocketWho who)
	Get the initial slow start threshold. More...

Time	GetMinRto (SocketWho who)
	Get the minimum RTO attribute. More...

uint32_t	GetMtu () const
	Get the MTU of the environment. More...

EventId	GetPersistentEvent (SocketWho who)
	Get the persistent event of the selected socket. More...

Time	GetPersistentTimeout (SocketWho who)
	Get the persistent timeout of the selected socket. More...

uint32_t	GetPktCount () const
	Get the number of application packets. More...

Time	GetPktInterval () const
	Get the interval to wait for each packet sent down from application to TCP. More...

uint32_t	GetPktSize () const
	Get the application packet size. More...

Time	GetPropagationDelay () const
	Get the channel Propagation Delay. More...

Ptr< TcpSocketMsgBase >	GetReceiverSocket ()
	Get the pointer to a previously created receiver socket. More...

uint32_t	GetReTxThreshold (SocketWho who)
	Get the retransmission threshold. More...

Time	GetRto (SocketWho who)
	Get the retransmission time. More...

Ptr< RttEstimator >	GetRttEstimator (SocketWho who)
	Get the Rtt estimator of the socket. More...

uint32_t	GetRWnd (SocketWho who)
	Get the rWnd of the selected socket. More...

Ptr< TcpRxBuffer >	GetRxBuffer (SocketWho who)
	Get the Rx buffer from selected socket. More...

uint32_t	GetSegSize (SocketWho who)
	Get the segment size of the node specified. More...

Ptr< TcpSocketMsgBase >	GetSenderSocket ()
	Get the pointer to a previously created sender socket. More...

Time	GetStartTime () const
	Get the data start time. More...

Ptr< TcpSocketState >	GetTcb (SocketWho who)
	Get the TCB from selected socket. More...

TcpSocket::TcpStates_t	GetTcpState (SocketWho who)
	Get the state of the TCP state machine. More...

virtual void	HighestTxSeqTrace (SequenceNumber32 oldValue, SequenceNumber32 newValue)
	Highest tx seq changes. More...

virtual void	NextTxSeqTrace (SequenceNumber32 oldValue, SequenceNumber32 newValue)
	Next tx seq changes. More...

virtual void	NormalClose (SocketWho who)
	Socket closed normally. More...

virtual void	PhyDrop (SocketWho who)
	Link drop. More...

virtual void	QueueDrop (SocketWho who)
	Drop on the queue. More...

virtual void	ReceivePacket (Ptr< Socket > socket)
	Packet received. More...

virtual void	RtoTrace (Time oldValue, Time newValue)
	RTO changes. More...

virtual void	RttTrace (Time oldTime, Time newTime)
	Rtt changes. More...

void	SendPacket (Ptr< Socket > socket, uint32_t pktSize, uint32_t pktCount, Time pktInterval)
	Send packets to other endpoint. More...

void	SetAppPktCount (uint32_t pktCount)
	Set app packet count. More...

void	SetAppPktInterval (Time pktInterval)
	Interval between app-generated packet. More...

void	SetAppPktSize (uint32_t pktSize)
	Set app packet size. More...

void	SetCongestionControl (TypeId congControl)
	Congestion control of the sender socket. More...

void	SetEcn (SocketWho who, TcpSocketBase::EcnMode_t ecnMode)
	Forcefully set the ecn mode on. More...

void	SetInitialCwnd (SocketWho who, uint32_t initialCwnd)
	Forcefully set the initial cwnd. More...

void	SetInitialSsThresh (SocketWho who, uint32_t initialSsThresh)
	Forcefully set the initial ssth. More...

void	SetMTU (uint32_t mtu)
	MTU of the bottleneck link. More...

void	SetPropagationDelay (Time propDelay)
	Propagation delay of the bottleneck link. More...

void	SetRcvBufSize (SocketWho who, uint32_t size)
	Forcefully set a defined size for rx buffer. More...

void	SetRecoveryAlgorithm (TypeId reccovery)
	recovery algorithm of the sender socket More...

void	SetSegmentSize (SocketWho who, uint32_t segmentSize)
	Forcefully set the segment size. More...

void	SetTransmitStart (Time startTime)
	Set the initial time at which the application sends the first data packet. More...

virtual void	SsThreshTrace (uint32_t oldValue, uint32_t newValue)
	Slow start threshold changes. More...

virtual void	UpdatedRttHistory (const SequenceNumber32 &seq, uint32_t sz, bool isRetransmission, SocketWho who)
	Updated the Rtt history. More...

Protected Member Functions inherited from ns3::TestCase
	TestCase (std::string name)
	Constructor. More...

void	AddTestCase (TestCase *testCase, TestDuration duration=QUICK)
	Add an individual child TestCase to this test suite. More...

TestCase *	GetParent () const
	Get the parent of this TestCsse. More...

bool	IsStatusFailure (void) const
	Check if any tests failed. More...

bool	IsStatusSuccess (void) const
	Check if all tests passed. More...

void	SetDataDir (std::string directory)
	Set the data directory where reference trace files can be found. More...

void	ReportTestFailure (std::string cond, std::string actual, std::string limit, std::string message, std::string file, int32_t line)
	Log the failure of this TestCase. More...

bool	MustAssertOnFailure (void) const
	Check if this run should assert on failure. More...

bool	MustContinueOnFailure (void) const
	Check if this run should continue on failure. More...

std::string	CreateDataDirFilename (std::string filename)
	Construct the full path to a file in the data directory. More...

std::string	CreateTempDirFilename (std::string filename)
	Construct the full path to a file in a temporary directory. More...

Protected Attributes
uint32_t	m_bytesRcvButNotAcked
	Number of bytes received but not acked. More...

uint32_t	m_countRetr
	Retry counter. More...

uint32_t	m_dupAckReceived
	DipACk received. More...

Ptr< TcpSeqErrorModel >	m_errorModel
	Error model. More...

bool	m_pktDropped
	The packet has been dropped. More...

bool	m_pktWasDropped
	The packet was dropped (according to the receiver). More...

SequenceNumber32	m_previousAck
	Previous ACK received. More...

SequenceNumber32	m_rcvNextExpAck
	Receiver next expected sequence number. More...

uint32_t	m_seqToKill
	Sequence number to drop. More...

SequenceNumber32	m_sndNextExpSeq
	Sender next expected sequence number. More...

Protected Attributes inherited from ns3::TcpGeneralTest
TypeId	m_congControlTypeId
	Congestion control. More...

TypeId	m_recoveryTypeId
	Recovery. More...

Additional Inherited Members
Public Types inherited from ns3::TcpGeneralTest
enum	SocketWho { SENDER, RECEIVER }
	Used as parameter of methods, specifies on what node the caller is interested (e.g. More...

Public Types inherited from ns3::TestCase
enum	TestDuration { QUICK = 1, EXTENSIVE = 2, TAKES_FOREVER = 3 }
	How long the test takes to execute. More...

Detailed Description

Test the fast retransmission.

Checking what is happening is not so easy, so there are a lot of variables which helps to keep track on what is happening. The idea is following sequence and ack numbers which are exchanged, testing if they are the same as the implementation transmits.

Definition at line 41 of file tcp-fast-retr-test.cc.

Constructor & Destructor Documentation

◆ TcpFastRetrTest()

TcpFastRetrTest::TcpFastRetrTest	(	TypeId	congControl,
		uint32_t	seqToKill,
		const std::string &	msg
	)

Constructor.

Parameters

congControl	Type of congestion control.
seqToKill	Sequence number of the packet to drop.
msg	Test message.

Definition at line 99 of file tcp-fast-retr-test.cc.

References ns3::TcpGeneralTest::m_congControlTypeId.

Member Function Documentation

◆ AfterRTOExpired()

void TcpFastRetrTest::AfterRTOExpired	(	const Ptr< const TcpSocketState >	tcb,
		SocketWho	who
	)

protectedvirtual

Rto has expired.

Parameters

tcb	Transmission control block
who	where the RTO has expired (SENDER or RECEIVER)

Reimplemented from ns3::TcpGeneralTest.

Definition at line 376 of file tcp-fast-retr-test.cc.

References NS_ASSERT_MSG().

◆ ConfigureEnvironment()

void TcpFastRetrTest::ConfigureEnvironment ( void )

protectedvirtual

Change the configuration of the environment.

Reimplemented from ns3::TcpGeneralTest.

Definition at line 122 of file tcp-fast-retr-test.cc.

References ns3::TcpGeneralTest::SetAppPktCount().

◆ ConfigureProperties()

void TcpFastRetrTest::ConfigureProperties ( void )

protectedvirtual

Change the configuration of the socket properties.

Reimplemented from ns3::TcpGeneralTest.

Definition at line 115 of file tcp-fast-retr-test.cc.

References ns3::TcpGeneralTest::SENDER, and ns3::TcpGeneralTest::SetInitialSsThresh().

◆ CongStateTrace()

void TcpFastRetrTest::CongStateTrace	(	const TcpSocketState::TcpCongState_t	oldValue,
		const TcpSocketState::TcpCongState_t	newValue
	)

protectedvirtual

State on Ack state machine changes.

Parameters

oldValue	old value
newValue	new value

Reimplemented from ns3::TcpGeneralTest.

Definition at line 382 of file tcp-fast-retr-test.cc.

References ns3::TcpGeneralTest::GetDupAckCount(), ns3::TcpGeneralTest::GetReTxThreshold(), NS_LOG_FUNCTION, NS_TEST_ASSERT_MSG_EQ, and ns3::TcpGeneralTest::SENDER.

◆ CreateReceiverErrorModel()

Ptr< ErrorModel > TcpFastRetrTest::CreateReceiverErrorModel ( )

virtual

Create and return the error model to install in the receiver node.

Returns: receiver error model

Reimplemented from ns3::TcpGeneralTest.

Definition at line 135 of file tcp-fast-retr-test.cc.

References ns3::TcpSeqErrorModel::AddSeqToKill(), m_errorModel, m_seqToKill, ns3::MakeCallback(), PktDropped(), and ns3::TcpGeneralErrorModel::SetDropCallback().

◆ CreateSenderErrorModel()

Ptr< ErrorModel > TcpFastRetrTest::CreateSenderErrorModel ( )

virtual

Create and return the error model to install in the sender node.

Returns: sender error model

Reimplemented from ns3::TcpGeneralTest.

Definition at line 129 of file tcp-fast-retr-test.cc.

◆ CreateSenderSocket()

Ptr< TcpSocketMsgBase > TcpFastRetrTest::CreateSenderSocket ( Ptr< Node > node )

virtual

Create and install the socket to install on the sender.

Parameters

node	sender node pointer

Returns: the socket to be installed in the sender

Reimplemented from ns3::TcpGeneralTest.

Definition at line 146 of file tcp-fast-retr-test.cc.

References ns3::Seconds(), and ns3::ObjectBase::SetAttribute().

◆ FinalChecks()

void TcpFastRetrTest::FinalChecks ( )

protectedvirtual

Performs the (eventual) final checks through test asserts.

Reimplemented from ns3::TcpGeneralTest.

Definition at line 420 of file tcp-fast-retr-test.cc.

References ns3::SequenceNumber< NUMERIC_TYPE, SIGNED_TYPE >::GetValue(), m_countRetr, m_pktWasDropped, m_rcvNextExpAck, and NS_TEST_ASSERT_MSG_EQ.

◆ PktDropped()

void TcpFastRetrTest::PktDropped	(	const Ipv4Header &	ipH,
		const TcpHeader &	tcpH,
		Ptr< const Packet >	p
	)

protected

Check if the packet being dropped is the right one.

Parameters

ipH	IPv4 header.
tcpH	TCP header.
p	The packet.

Definition at line 408 of file tcp-fast-retr-test.cc.

References ns3::TcpHeader::GetSequenceNumber(), m_pktDropped, m_rcvNextExpAck, m_seqToKill, NS_LOG_FUNCTION, and NS_TEST_ASSERT_MSG_EQ.

Referenced by CreateReceiverErrorModel().

◆ ProcessedAck()

void TcpFastRetrTest::ProcessedAck	(	const Ptr< const TcpSocketState >	tcb,
		const TcpHeader &	h,
		SocketWho	who
	)

protectedvirtual

Processed ack.

Invoked after the processing of the ACK

Parameters

tcb	Transmission Control Block
h	the header of segment
who	the socket which has processed the ACK (SENDER or RECEIVER)

Reimplemented from ns3::TcpGeneralTest.

Definition at line 333 of file tcp-fast-retr-test.cc.

References ns3::TcpHeader::GetAckNumber(), ns3::GetCongStateFrom(), ns3::TcpGeneralTest::GetDupAckCount(), ns3::TcpGeneralTest::GetReTxThreshold(), ns3::SequenceNumber< NUMERIC_TYPE, SIGNED_TYPE >::GetValue(), m_dupAckReceived, m_pktWasDropped, m_previousAck, NS_LOG_FUNCTION, NS_TEST_ASSERT_MSG_EQ, NS_TEST_ASSERT_MSG_GT_OR_EQ, ns3::TcpGeneralTest::RECEIVER, and ns3::TcpGeneralTest::SENDER.

◆ RcvAck()

void TcpFastRetrTest::RcvAck	(	const Ptr< const TcpSocketState >	tcb,
		const TcpHeader &	h,
		SocketWho	who
	)

protectedvirtual

Received ack.

Invoked when an ACK is received (no processing is done yet)

Parameters

tcb	Transmission Control Block
h	the header of segment
who	the socket which has received the ACK (SENDER or RECEIVER)

Reimplemented from ns3::TcpGeneralTest.

Definition at line 287 of file tcp-fast-retr-test.cc.

References ns3::TcpHeader::GetAckNumber(), ns3::GetCongStateFrom(), ns3::TcpGeneralTest::GetDupAckCount(), ns3::TcpGeneralTest::GetReTxThreshold(), ns3::SequenceNumber< NUMERIC_TYPE, SIGNED_TYPE >::GetValue(), m_dupAckReceived, m_seqToKill, NS_LOG_FUNCTION, NS_TEST_ASSERT_MSG_EQ, ns3::TcpGeneralTest::RECEIVER, and ns3::TcpGeneralTest::SENDER.

◆ Rx()

void TcpFastRetrTest::Rx	(	const Ptr< const Packet >	p,
		const TcpHeader &	h,
		SocketWho	who
	)

protectedvirtual

Packet received from IP layer.

Parameters

p	packet
h	header
who	the socket which has received the packet (SENDER or RECEIVER)

Reimplemented from ns3::TcpGeneralTest.

Definition at line 155 of file tcp-fast-retr-test.cc.

References ns3::TcpGeneralTest::GetSegSize(), ns3::TcpHeader::GetSequenceNumber(), ns3::SequenceNumber< NUMERIC_TYPE, SIGNED_TYPE >::GetValue(), m_bytesRcvButNotAcked, m_pktDropped, m_rcvNextExpAck, m_seqToKill, NS_LOG_INFO, ns3::TcpGeneralTest::RECEIVER, and ns3::TcpGeneralTest::SENDER.

◆ Tx()

void TcpFastRetrTest::Tx	(	const Ptr< const Packet >	p,
		const TcpHeader &	h,
		SocketWho	who
	)

protectedvirtual

Packet transmitted down to IP layer.

Parameters

p	packet
h	header
who	the socket which has received the packet (SENDER or RECEIVER)

Reimplemented from ns3::TcpGeneralTest.

Definition at line 186 of file tcp-fast-retr-test.cc.

References ns3::TcpHeader::GetAckNumber(), ns3::TcpGeneralTest::GetDelAckCount(), ns3::TcpHeader::GetFlags(), ns3::TcpGeneralTest::GetSegSize(), ns3::TcpHeader::GetSequenceNumber(), ns3::Packet::GetSize(), ns3::SequenceNumber< NUMERIC_TYPE, SIGNED_TYPE >::GetValue(), m_countRetr, m_pktDropped, m_rcvNextExpAck, m_seqToKill, m_sndNextExpSeq, NS_LOG_INFO, NS_TEST_ASSERT_MSG_EQ, ns3::TcpGeneralTest::RECEIVER, and ns3::TcpGeneralTest::SENDER.

Member Data Documentation

◆ m_bytesRcvButNotAcked

uint32_t TcpFastRetrTest::m_bytesRcvButNotAcked

protected

Number of bytes received but not acked.

Definition at line 94 of file tcp-fast-retr-test.cc.

Referenced by Rx().

◆ m_countRetr

uint32_t TcpFastRetrTest::m_countRetr

protected

Retry counter.

Definition at line 92 of file tcp-fast-retr-test.cc.

Referenced by FinalChecks(), and Tx().

◆ m_dupAckReceived

uint32_t TcpFastRetrTest::m_dupAckReceived

protected

DipACk received.

Definition at line 86 of file tcp-fast-retr-test.cc.

Referenced by ProcessedAck(), and RcvAck().

◆ m_errorModel

Ptr<TcpSeqErrorModel> TcpFastRetrTest::m_errorModel

protected

Error model.

Definition at line 96 of file tcp-fast-retr-test.cc.

Referenced by CreateReceiverErrorModel().

◆ m_pktDropped

bool TcpFastRetrTest::m_pktDropped

protected

The packet has been dropped.

Definition at line 83 of file tcp-fast-retr-test.cc.

Referenced by PktDropped(), Rx(), and Tx().

◆ m_pktWasDropped

bool TcpFastRetrTest::m_pktWasDropped

protected

The packet was dropped (according to the receiver).

Definition at line 84 of file tcp-fast-retr-test.cc.

Referenced by FinalChecks(), and ProcessedAck().

◆ m_previousAck

SequenceNumber32 TcpFastRetrTest::m_previousAck

protected

Previous ACK received.

Definition at line 88 of file tcp-fast-retr-test.cc.

Referenced by ProcessedAck().

◆ m_rcvNextExpAck

SequenceNumber32 TcpFastRetrTest::m_rcvNextExpAck

protected

Receiver next expected sequence number.

Definition at line 90 of file tcp-fast-retr-test.cc.

Referenced by FinalChecks(), PktDropped(), Rx(), and Tx().

◆ m_seqToKill

uint32_t TcpFastRetrTest::m_seqToKill

protected

Sequence number to drop.

Definition at line 85 of file tcp-fast-retr-test.cc.

Referenced by CreateReceiverErrorModel(), PktDropped(), RcvAck(), Rx(), and Tx().

◆ m_sndNextExpSeq

SequenceNumber32 TcpFastRetrTest::m_sndNextExpSeq

protected

Sender next expected sequence number.

Definition at line 89 of file tcp-fast-retr-test.cc.

Referenced by Tx().

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

src/internet/test/tcp-fast-retr-test.cc

Public Member Functions

Protected Member Functions

Protected Attributes

Additional Inherited Members

Detailed Description

Constructor & Destructor Documentation

◆ TcpFastRetrTest()

Member Function Documentation

◆ AfterRTOExpired()

◆ ConfigureEnvironment()

◆ ConfigureProperties()

◆ CongStateTrace()

◆ CreateReceiverErrorModel()

◆ CreateSenderErrorModel()

◆ CreateSenderSocket()

◆ FinalChecks()

◆ PktDropped()

◆ ProcessedAck()

◆ RcvAck()

◆ Rx()

◆ Tx()

Member Data Documentation

◆ m_bytesRcvButNotAcked

◆ m_countRetr

◆ m_dupAckReceived

◆ m_errorModel

◆ m_pktDropped

◆ m_pktWasDropped

◆ m_previousAck

◆ m_rcvNextExpAck

◆ m_seqToKill

◆ m_sndNextExpSeq