Testing the moments after an RTO expiration. More...

Inheritance diagram for TcpRtoTest:

Collaboration diagram for TcpRtoTest:

Public Member Functions
	TcpRtoTest (const TypeId &congControl, const std::string &msg)
	Constructor.

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

	~TcpGeneralTest () override

Public Member Functions inherited from ns3::TestCase
	TestCase (const TestCase &)=delete

virtual	~TestCase ()
	Destructor.

std::string	GetName () const

TestCase &	operator= (const TestCase &)=delete

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

void	ConfigureEnvironment () override
	Change the configuration of the environment.

void	ConfigureProperties () override
	Change the configuration of the socket properties.

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

void	DoRun () override
	Execute the tcp test.

void	DoTeardown () override
	Teardown the TCP test.

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

uint32_t	GetPktSize () const
	Get the application packet size.

Time	GetPropagationDelay () const
	Get the channel Propagation Delay.

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

uint32_t	GetReTxThreshold (SocketWho who)
	Get the retransmission threshold.

Time	GetRto (SocketWho who)
	Get the retransmission time.

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

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

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

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

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

Time	GetStartTime () const
	Get the data start time.

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

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

Ptr< TcpTxBuffer >	GetTxBuffer (SocketWho who)
	Get the Tx buffer from selected socket.

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

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

virtual void	NormalClose (SocketWho who)
	Socket closed normally.

virtual void	PhyDrop (SocketWho who)
	Link drop.

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

virtual void	RateSampleUpdatedTrace (const TcpRateLinux::TcpRateSample &sample)
	Track the rate sample value of TcpRateLinux.

virtual void	RateUpdatedTrace (const TcpRateLinux::TcpRateConnection &rate)
	Track the rate value of TcpRateLinux.

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

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

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

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

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

void	SetAppPktCount (uint32_t pktCount)
	Set app packet count.

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

void	SetAppPktSize (uint32_t pktSize)
	Set app packet size.

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

void	SetDelAckMaxCount (SocketWho who, uint32_t count)
	Forcefully set the delayed acknowledgement count.

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

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

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

void	SetPaceInitialWindow (SocketWho who, bool paceWindow)
	Enable or disable pacing of the initial window.

void	SetPacingStatus (SocketWho who, bool pacing)
	Enable or disable pacing in the TCP socket.

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

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

void	SetRecoveryAlgorithm (TypeId recovery)
	recovery algorithm of the sender socket

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

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

void	SetUseEcn (SocketWho who, TcpSocketState::UseEcn_t useEcn)
	Forcefully set the ECN mode of use.

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

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

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

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

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

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

bool	IsStatusFailure () const
	Check if any tests failed.

bool	IsStatusSuccess () const
	Check if all tests passed.

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

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.

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

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

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

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

Private Attributes
bool	m_afterRTOExpired
	True if RTO is expired.

bool	m_segmentReceived
	True if segments have been received.

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 class	Duration { QUICK = 1 , EXTENSIVE = 2 , TAKES_FOREVER = 3 }
	How long the test takes to execute. More...

Static Public Attributes inherited from ns3::TestCase
static constexpr auto	QUICK = Duration::QUICK
	Deprecated test duration simple enums.

static constexpr auto	EXTENSIVE = Duration::EXTENSIVE

static constexpr auto	TAKES_FOREVER = Duration::TAKES_FOREVER

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

TypeId	m_recoveryTypeId
	Recovery.

Detailed Description

Testing the moments after an RTO expiration.

The scope of this test is to be sure that, after an RTO expiration, the TCP implementation set the correct state in the ACK state machine, and marks the lost segment as lost; then, after the retransmission, the state is fully recovered. This is the base check, where only one segment (the first) is lost and retransmitted.

Definition at line 32 of file tcp-rto-test.cc.

Constructor & Destructor Documentation

◆ TcpRtoTest()

TcpRtoTest::TcpRtoTest	(	const TypeId &	congControl,
		const std::string &	msg )

Constructor.

Parameters

congControl	Congestion control type.
msg	Test description.

Definition at line 58 of file tcp-rto-test.cc.

References ns3::TcpGeneralTest::m_congControlTypeId.

Member Function Documentation

◆ AfterRTOExpired()

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

overrideprotectedvirtual

Rto has expired.

Parameters

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

Reimplemented from ns3::TcpGeneralTest.

Definition at line 92 of file tcp-rto-test.cc.

References ns3::TcpSocketState::CA_LOSS, m_afterRTOExpired, and NS_TEST_ASSERT_MSG_EQ.

◆ ConfigureEnvironment()

void TcpRtoTest::ConfigureEnvironment ( )

overrideprotectedvirtual

Change the configuration of the environment.

Reimplemented from ns3::TcpGeneralTest.

Definition at line 67 of file tcp-rto-test.cc.

References ns3::TcpGeneralTest::ConfigureEnvironment(), and ns3::TcpGeneralTest::SetAppPktCount().

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◆ ConfigureProperties()

void TcpRtoTest::ConfigureProperties ( )

overrideprotectedvirtual

Change the configuration of the socket properties.

Reimplemented from ns3::TcpGeneralTest.

Definition at line 74 of file tcp-rto-test.cc.

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

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◆ CreateSenderSocket()

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

overrideprotectedvirtual

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 81 of file tcp-rto-test.cc.

References ns3::TcpGeneralTest::CreateSenderSocket(), and ns3::Seconds().

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◆ FinalChecks()

void TcpRtoTest::FinalChecks ( )

overrideprotectedvirtual

Performs the (eventual) final checks through test asserts.

Reimplemented from ns3::TcpGeneralTest.

Definition at line 148 of file tcp-rto-test.cc.

References m_segmentReceived, and NS_TEST_ASSERT_MSG_EQ.

◆ ProcessedAck()

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

overrideprotectedvirtual

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 130 of file tcp-rto-test.cc.

References ns3::TcpSocketState::CA_OPEN, m_afterRTOExpired, m_segmentReceived, NS_TEST_ASSERT_MSG_EQ, and ns3::TcpGeneralTest::SENDER.

◆ RcvAck()

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

overrideprotectedvirtual

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 106 of file tcp-rto-test.cc.

References ns3::TcpSocketState::CA_LOSS, ns3::TcpSocketState::CA_OPEN, m_afterRTOExpired, NS_TEST_ASSERT_MSG_EQ, and ns3::TcpGeneralTest::SENDER.

Member Data Documentation

◆ m_afterRTOExpired

bool TcpRtoTest::m_afterRTOExpired

private

True if RTO is expired.

Definition at line 54 of file tcp-rto-test.cc.

Referenced by AfterRTOExpired(), ProcessedAck(), and RcvAck().

◆ m_segmentReceived

bool TcpRtoTest::m_segmentReceived

private

True if segments have been received.

Definition at line 55 of file tcp-rto-test.cc.

Referenced by FinalChecks(), and ProcessedAck().

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

src/internet/test/tcp-rto-test.cc

Public Member Functions

Protected Member Functions

Private Attributes

Additional Inherited Members

Detailed Description

Constructor & Destructor Documentation

◆ TcpRtoTest()

Member Function Documentation

◆ AfterRTOExpired()

◆ ConfigureEnvironment()

◆ ConfigureProperties()

◆ CreateSenderSocket()

◆ FinalChecks()

◆ ProcessedAck()

◆ RcvAck()

Member Data Documentation

◆ m_afterRTOExpired

◆ m_segmentReceived