Testing the ssthresh behavior after the RTO expires. More...

Inheritance diagram for TcpSsThreshRtoTest:

Collaboration diagram for TcpSsThreshRtoTest:

Public Member Functions
	TcpSsThreshRtoTest (const TypeId &congControl, uint32_t seqToDrop, Time minRto, 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	BeforeRTOExpired (const Ptr< const TcpSocketState > tcb, SocketWho who) override
	Rto has expired.

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

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

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

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

void	PktDropped (const Ipv4Header &ipH, const TcpHeader &tcpH, Ptr< const Packet > p)
	Called when a packet has been dropped.

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

Protected Member Functions inherited from ns3::TcpGeneralTest
virtual void	ConfigureProperties ()
	Change the configuration of the socket properties.

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< 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.

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

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

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

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	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
uint32_t	m_bytesInFlight
	Store the number of bytes in flight.

uint32_t	m_bytesInFlightBeforeRto
	Store the number of bytes in flight before the RTO expiration.

Time	m_minRtoTime
	the minimum RTO time

uint32_t	m_seqToDrop
	the sequence number to drop

uint32_t	m_ssThreshSocket
	the ssThresh as computed by the socket

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 ssthresh behavior after the RTO expires.

The scope of this test is to be sure that, after an RTO expiration, the TCP implementation sets the correct ssthresh value

Definition at line 165 of file tcp-rto-test.cc.

Constructor & Destructor Documentation

◆ TcpSsThreshRtoTest()

TcpSsThreshRtoTest::TcpSsThreshRtoTest	(	const TypeId &	congControl,
		uint32_t	seqToDrop,
		Time	minRto,
		const std::string &	msg )

Constructor.

Parameters

congControl	congestion control type
seqToDrop	sequence number to drop
minRto	minimum RTO
msg	test description

Definition at line 207 of file tcp-rto-test.cc.

References ns3::TcpGeneralTest::m_congControlTypeId.

Member Function Documentation

◆ AfterRTOExpired()

void TcpSsThreshRtoTest::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 289 of file tcp-rto-test.cc.

References ns3::TcpGeneralTest::GetSenderSocket(), m_bytesInFlightBeforeRto, m_ssThreshSocket, NS_LOG_DEBUG, and NS_TEST_ASSERT_MSG_EQ.

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◆ BeforeRTOExpired()

void TcpSsThreshRtoTest::BeforeRTOExpired	(	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 275 of file tcp-rto-test.cc.

References m_bytesInFlight, m_bytesInFlightBeforeRto, NS_LOG_DEBUG, and ns3::TcpGeneralTest::SENDER.

◆ BytesInFlightTrace()

void TcpSsThreshRtoTest::BytesInFlightTrace	(	uint32_t	oldValue,
		uint32_t	newValue )

overrideprotectedvirtual

Bytes in flight changes.

This applies only for sender socket.

Parameters

oldValue	old value
newValue	new value

Reimplemented from ns3::TcpGeneralTest.

Definition at line 261 of file tcp-rto-test.cc.

References m_bytesInFlight, and NS_LOG_DEBUG.

◆ ConfigureEnvironment()

void TcpSsThreshRtoTest::ConfigureEnvironment ( )

overrideprotectedvirtual

Change the configuration of the environment.

Reimplemented from ns3::TcpGeneralTest.

Definition at line 219 of file tcp-rto-test.cc.

References ns3::TcpGeneralTest::ConfigureEnvironment(), ns3::MicroSeconds(), ns3::MilliSeconds(), ns3::TcpGeneralTest::SetAppPktCount(), ns3::TcpGeneralTest::SetAppPktInterval(), and ns3::TcpGeneralTest::SetPropagationDelay().

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◆ CreateReceiverErrorModel()

Ptr< ErrorModel > TcpSsThreshRtoTest::CreateReceiverErrorModel ( )

overrideprotectedvirtual

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

Returns: receiver error model

Reimplemented from ns3::TcpGeneralTest.

Definition at line 238 of file tcp-rto-test.cc.

References ns3::CreateObject(), m_seqToDrop, ns3::MakeCallback(), NS_LOG_DEBUG, and PktDropped().

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◆ CreateSenderSocket()

Ptr< TcpSocketMsgBase > TcpSsThreshRtoTest::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 228 of file tcp-rto-test.cc.

References ns3::TcpGeneralTest::CreateSenderSocket(), m_minRtoTime, and NS_LOG_DEBUG.

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◆ PktDropped()

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

protected

Called when a packet has been dropped.

Parameters

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

Definition at line 255 of file tcp-rto-test.cc.

References NS_LOG_DEBUG.

Referenced by CreateReceiverErrorModel().

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◆ SsThreshTrace()

void TcpSsThreshRtoTest::SsThreshTrace	(	uint32_t	oldValue,
		uint32_t	newValue )

overrideprotectedvirtual

Slow start threshold changes.

This applies only for sender socket.

Parameters

oldValue	old value
newValue	new value

Reimplemented from ns3::TcpGeneralTest.

Definition at line 268 of file tcp-rto-test.cc.

References m_ssThreshSocket, and NS_LOG_DEBUG.

Member Data Documentation

◆ m_bytesInFlight

uint32_t TcpSsThreshRtoTest::m_bytesInFlight

private

Store the number of bytes in flight.

Definition at line 199 of file tcp-rto-test.cc.

Referenced by BeforeRTOExpired(), and BytesInFlightTrace().

◆ m_bytesInFlightBeforeRto

uint32_t TcpSsThreshRtoTest::m_bytesInFlightBeforeRto

private

Store the number of bytes in flight before the RTO expiration.

Definition at line 201 of file tcp-rto-test.cc.

Referenced by AfterRTOExpired(), and BeforeRTOExpired().

◆ m_minRtoTime

Time TcpSsThreshRtoTest::m_minRtoTime

private

the minimum RTO time

Definition at line 204 of file tcp-rto-test.cc.

Referenced by CreateSenderSocket().

◆ m_seqToDrop

uint32_t TcpSsThreshRtoTest::m_seqToDrop

private

the sequence number to drop

Definition at line 203 of file tcp-rto-test.cc.

Referenced by CreateReceiverErrorModel().

◆ m_ssThreshSocket

uint32_t TcpSsThreshRtoTest::m_ssThreshSocket

private

the ssThresh as computed by the socket

Definition at line 202 of file tcp-rto-test.cc.

Referenced by AfterRTOExpired(), and SsThreshTrace().

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

◆ TcpSsThreshRtoTest()

Member Function Documentation

◆ AfterRTOExpired()

◆ BeforeRTOExpired()

◆ BytesInFlightTrace()

◆ ConfigureEnvironment()

◆ CreateReceiverErrorModel()

◆ CreateSenderSocket()

◆ PktDropped()

◆ SsThreshTrace()

Member Data Documentation

◆ m_bytesInFlight

◆ m_bytesInFlightBeforeRto

◆ m_minRtoTime

◆ m_seqToDrop

◆ m_ssThreshSocket