Test the normal behavior for slow start. More...

Inheritance diagram for TcpSlowStartNormalTest:

Public Member Functions
	TcpSlowStartNormalTest (uint32_t segmentSize, uint32_t packetSize, uint32_t initSsTh, uint32_t packets, TypeId &congControl, const std::string &desc)
	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	ConfigureEnvironment ()
	Change the configuration of the environment. More...

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

virtual void	CWndTrace (uint32_t oldValue, uint32_t newValue)
	Trace the cWnd over the slow start. More...

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

void	QueueDrop (SocketWho who)
	Drop on the queue. 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	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	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< ErrorModel >	CreateReceiverErrorModel ()
	Create and return the error model to install in the receiver node. 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 >	CreateSenderSocket (Ptr< Node > node)
	Create and install the socket to install on the sender. 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	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	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	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_ackedBytes
	ACKed bytes. More...

uint32_t	m_allowedIncrease
	Allowed increase. More...

bool	m_initial
	First cycle flag. More...

uint32_t	m_sentBytes
	Sent bytes. More...

uint32_t	m_totalAckedBytes
	Total ACKed bytes. More...

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

TypeId	m_recoveryTypeId
	Recovery. More...

Private Attributes
uint32_t	m_packets
	Packet counter. More...

uint32_t	m_packetSize
	Packet size. More...

uint32_t	m_segmentSize
	Segment size. 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 normal behavior for slow start.

As method for checking the slow start, a callback is attached to the congestion window. With the knowledge of the number of segments, we can calculate if the value of the cWnd is right. Also, with a fixed delay for each packet, we can know if the timing is correct.

Check what is done inside CWndTrace.

See also: CWndTrace

Definition at line 47 of file tcp-slow-start-test.cc.

Constructor & Destructor Documentation

◆ TcpSlowStartNormalTest()

TcpSlowStartNormalTest::TcpSlowStartNormalTest	(	uint32_t	segmentSize,
		uint32_t	packetSize,
		uint32_t	initSsTh,
		uint32_t	packets,
		TypeId &	congControl,
		const std::string &	desc
	)

Constructor.

Parameters

segmentSize	Segment size.
packetSize	Packet size.
initSsTh	Initial SlowStart threshold.
packets	Packet counter.
congControl	Congestion control.
desc	Test description.

Definition at line 87 of file tcp-slow-start-test.cc.

References ns3::TcpGeneralTest::m_congControlTypeId.

Member Function Documentation

◆ ConfigureEnvironment()

void TcpSlowStartNormalTest::ConfigureEnvironment ( void )

protectedvirtual

Change the configuration of the environment.

Reimplemented from ns3::TcpGeneralTest.

Definition at line 107 of file tcp-slow-start-test.cc.

References m_packets, m_packetSize, ns3::TcpGeneralTest::SetAppPktCount(), and ns3::TcpGeneralTest::SetAppPktSize().

◆ ConfigureProperties()

void TcpSlowStartNormalTest::ConfigureProperties ( void )

protectedvirtual

Change the configuration of the socket properties.

Reimplemented from ns3::TcpGeneralTest.

Definition at line 115 of file tcp-slow-start-test.cc.

References m_segmentSize, ns3::TcpGeneralTest::RECEIVER, ns3::TcpGeneralTest::SENDER, ns3::TcpGeneralTest::SetInitialSsThresh(), and ns3::TcpGeneralTest::SetSegmentSize().

◆ CWndTrace()

void TcpSlowStartNormalTest::CWndTrace	(	uint32_t	oldValue,
		uint32_t	newValue
	)

protectedvirtual

Trace the cWnd over the slow start.

This method is called each time the cWnd changes. It should be updated only by MSS bytes at time. Since the size doubles each RTT, a timing test is also performed: the doubling should be made in 0.5s from the first (0.5s is the delay of the SimpleChannel which connect the two socket).

Parameters

oldValue	old value of cWnd
newValue	new value of cWnd

Reimplemented from ns3::TcpGeneralTest.

Definition at line 147 of file tcp-slow-start-test.cc.

References ns3::TcpGeneralTest::GetInitialSsThresh(), ns3::TcpGeneralTest::GetSegSize(), m_allowedIncrease, m_initial, NS_LOG_INFO, NS_TEST_ASSERT_MSG_EQ, NS_TEST_ASSERT_MSG_GT_OR_EQ, NS_TEST_ASSERT_MSG_LT_OR_EQ, and ns3::TcpGeneralTest::SENDER.

◆ PhyDrop()

void TcpSlowStartNormalTest::PhyDrop ( SocketWho who )

protectedvirtual

Link drop.

Parameters

who	where the drop occurred (SENDER or RECEIVER)

Reimplemented from ns3::TcpGeneralTest.

Definition at line 130 of file tcp-slow-start-test.cc.

References NS_FATAL_ERROR.

◆ QueueDrop()

void TcpSlowStartNormalTest::QueueDrop ( SocketWho who )

protectedvirtual

Drop on the queue.

Parameters

who	where the drop occurred (SENDER or RECEIVER)

Reimplemented from ns3::TcpGeneralTest.

Definition at line 124 of file tcp-slow-start-test.cc.

References NS_FATAL_ERROR.

◆ Rx()

void TcpSlowStartNormalTest::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 183 of file tcp-slow-start-test.cc.

References ns3::TcpHeader::GetAckNumber(), ns3::TcpGeneralTest::GetSegSize(), ns3::SequenceNumber< NUMERIC_TYPE, SIGNED_TYPE >::GetValue(), m_ackedBytes, m_allowedIncrease, m_totalAckedBytes, ns3::Now(), NS_LOG_FUNCTION, NS_LOG_INFO, and ns3::TcpGeneralTest::SENDER.

◆ Tx()

void TcpSlowStartNormalTest::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 172 of file tcp-slow-start-test.cc.

References ns3::TcpGeneralTest::GetSegSize(), m_sentBytes, ns3::Now(), NS_LOG_FUNCTION, and ns3::TcpGeneralTest::SENDER.

Member Data Documentation

◆ m_ackedBytes

uint32_t TcpSlowStartNormalTest::m_ackedBytes

protected

ACKed bytes.

Definition at line 74 of file tcp-slow-start-test.cc.

Referenced by Rx().

◆ m_allowedIncrease

uint32_t TcpSlowStartNormalTest::m_allowedIncrease

protected

Allowed increase.

Definition at line 77 of file tcp-slow-start-test.cc.

Referenced by CWndTrace(), and Rx().

◆ m_initial

bool TcpSlowStartNormalTest::m_initial

protected

First cycle flag.

Definition at line 79 of file tcp-slow-start-test.cc.

Referenced by CWndTrace().

◆ m_packets

uint32_t TcpSlowStartNormalTest::m_packets

private

Packet counter.

Definition at line 84 of file tcp-slow-start-test.cc.

Referenced by ConfigureEnvironment().

◆ m_packetSize

uint32_t TcpSlowStartNormalTest::m_packetSize

private

Packet size.

Definition at line 83 of file tcp-slow-start-test.cc.

Referenced by ConfigureEnvironment().

◆ m_segmentSize

uint32_t TcpSlowStartNormalTest::m_segmentSize

private

Segment size.

Definition at line 82 of file tcp-slow-start-test.cc.

Referenced by ConfigureProperties().

◆ m_sentBytes

uint32_t TcpSlowStartNormalTest::m_sentBytes

protected

Sent bytes.

Definition at line 75 of file tcp-slow-start-test.cc.

Referenced by Tx().

◆ m_totalAckedBytes

uint32_t TcpSlowStartNormalTest::m_totalAckedBytes

protected

Total ACKed bytes.

Definition at line 76 of file tcp-slow-start-test.cc.

Referenced by Rx().

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

src/internet/test/tcp-slow-start-test.cc

Public Member Functions

Protected Member Functions

Protected Attributes

Private Attributes

Additional Inherited Members

Detailed Description

Constructor & Destructor Documentation

◆ TcpSlowStartNormalTest()

Member Function Documentation

◆ ConfigureEnvironment()

◆ ConfigureProperties()

◆ CWndTrace()

◆ PhyDrop()

◆ QueueDrop()

◆ Rx()

◆ Tx()

Member Data Documentation

◆ m_ackedBytes

◆ m_allowedIncrease

◆ m_initial

◆ m_packets

◆ m_packetSize

◆ m_segmentSize

◆ m_sentBytes

◆ m_totalAckedBytes