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

Inheritance diagram for TcpSsThreshRtoTest:

Public Member Functions
	TcpSsThreshRtoTest (TypeId &congControl, uint32_t seqToDrop, Time minRto, const std::string &msg)
	Constructor. 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	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 void	ConfigureEnvironment ()
	Change the configuration of the environment. More...

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

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

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

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

Protected Member Functions inherited from ns3::TcpGeneralTest
virtual void	ConfigureProperties (void)
	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 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< ErrorModel >	CreateSenderErrorModel ()
	Create and return the error model to install in the sender node. 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...

virtual void	FinalChecks ()
	Performs the (eventual) final checks through test asserts. 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	ProcessedAck (const Ptr< const TcpSocketState > tcb, const TcpHeader &h, SocketWho who)
	Processed ack. More...

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

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

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

Private Attributes
uint32_t	m_bytesInFlight
	Store the number of bytes in flight. More...

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

Time	m_minRtoTime
	the minimum RTO time More...

uint32_t	m_seqToDrop
	the sequence number to drop More...

uint32_t	m_ssThreshSocket
	the ssThresh as computed by the socket 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...

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

TypeId	m_recoveryTypeId
	Recovery. More...

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 181 of file tcp-rto-test.cc.

Constructor & Destructor Documentation

◆ TcpSsThreshRtoTest()

TcpSsThreshRtoTest::TcpSsThreshRtoTest	(	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 220 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
	)

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 300 of file tcp-rto-test.cc.

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

◆ BeforeRTOExpired()

void TcpSsThreshRtoTest::BeforeRTOExpired	(	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 286 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
	)

protectedvirtual

Bytes in flight changes.

This applies only for sender socket.

Parameters

oldValue	old value
newValue	new value

Reimplemented from ns3::TcpGeneralTest.

Definition at line 272 of file tcp-rto-test.cc.

References m_bytesInFlight, and NS_LOG_DEBUG.

◆ ConfigureEnvironment()

void TcpSsThreshRtoTest::ConfigureEnvironment ( void )

protectedvirtual

Change the configuration of the environment.

Reimplemented from ns3::TcpGeneralTest.

Definition at line 229 of file tcp-rto-test.cc.

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

◆ CreateReceiverErrorModel()

Ptr< ErrorModel > TcpSsThreshRtoTest::CreateReceiverErrorModel ( )

protectedvirtual

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

Returns: receiver error model

Reimplemented from ns3::TcpGeneralTest.

Definition at line 248 of file tcp-rto-test.cc.

References ns3::TcpSeqErrorModel::AddSeqToKill(), m_seqToDrop, ns3::MakeCallback(), NS_LOG_DEBUG, PktDropped(), and ns3::TcpGeneralErrorModel::SetDropCallback().

◆ CreateSenderSocket()

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

protectedvirtual

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 238 of file tcp-rto-test.cc.

References m_minRtoTime, NS_LOG_DEBUG, and ns3::ObjectBase::SetAttribute().

◆ 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 265 of file tcp-rto-test.cc.

References NS_LOG_DEBUG.

Referenced by CreateReceiverErrorModel().

◆ SsThreshTrace()

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

protectedvirtual

Slow start threshold changes.

This applies only for sender socket.

Parameters

oldValue	old value
newValue	new value

Reimplemented from ns3::TcpGeneralTest.

Definition at line 279 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 213 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 214 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 217 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 216 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 215 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