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

#include "tcp-slow-start-test.h"

Inheritance diagram for ns3::TcpSlowStartNormalTest:

Collaboration diagram for ns3::TcpSlowStartNormalTest:

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

Public Member Functions inherited from ns3::TcpGeneralTest
	TcpGeneralTest (const std::string &desc, uint32_t pktSize=500, uint32_t pktCount=10, const Time &pktInterval=Seconds(0.01), const Time &propagationDelay=Seconds(0.5), const Time &startTime=Seconds(10), uint32_t initialSlowStartThresh=0xffff, uint32_t initialCwnd=1, uint32_t segmentSize=500, TypeId congestionControl=TcpNewReno::GetTypeId(), uint32_t mtu=1500)
	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	CWndTrace (uint32_t oldValue, uint32_t newValue)
	Trace the cWnd over the slow start. 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	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...

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...

uint32_t	GetInitialCwnd () const
	Get the initial congestion window. More...

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

Time	GetMinRto (SocketWho who)
	Get the minimun 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...

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	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	RTOExpired (const Ptr< const TcpSocketState > tcb, SocketWho who)
	Rto has expired. More...

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

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

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

void	AddTestCase (TestCase *testCase, enum TestDuration duration)
	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

uint32_t	m_allowedIncrease

bool	m_initial

uint32_t	m_sentBytes

uint32_t	m_totalAckedBytes

Protected Attributes inherited from ns3::TcpGeneralTest
TypeId	m_congControlTypeId
	Congestion control. 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 39 of file tcp-slow-start-test.h.

Constructor & Destructor Documentation

ns3::TcpSlowStartNormalTest::TcpSlowStartNormalTest	(	uint32_t	segmentSize,
		uint32_t	packetSize,
		uint32_t	initSsTh,
		uint32_t	packets,
		TypeId &	congControl,
		const std::string &	desc
	)

Definition at line 31 of file tcp-slow-start-test.cc.

Member Function Documentation

void ns3::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 59 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.

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void ns3::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 95 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::Simulator::Now(), NS_LOG_FUNCTION, NS_LOG_INFO, and ns3::TcpGeneralTest::SENDER.

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void ns3::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 84 of file tcp-slow-start-test.cc.

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

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Member Data Documentation

uint32_t ns3::TcpSlowStartNormalTest::m_ackedBytes

protected

Definition at line 52 of file tcp-slow-start-test.h.

Referenced by Rx().

uint32_t ns3::TcpSlowStartNormalTest::m_allowedIncrease

protected

Definition at line 55 of file tcp-slow-start-test.h.

Referenced by CWndTrace(), and Rx().

bool ns3::TcpSlowStartNormalTest::m_initial

protected

Definition at line 57 of file tcp-slow-start-test.h.

Referenced by CWndTrace().

uint32_t ns3::TcpSlowStartNormalTest::m_sentBytes

protected

Definition at line 53 of file tcp-slow-start-test.h.

Referenced by Tx().

uint32_t ns3::TcpSlowStartNormalTest::m_totalAckedBytes

protected

Definition at line 54 of file tcp-slow-start-test.h.

Referenced by Rx().

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

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

Public Member Functions

Protected Member Functions

Protected Attributes

Additional Inherited Members

Detailed Description

Constructor & Destructor Documentation

Member Function Documentation

Member Data Documentation