Test the fast retransmission. More...

#include "tcp-fast-retr-test.h"

Inheritance diagram for ns3::TcpFastRetrTest:

Collaboration diagram for ns3::TcpFastRetrTest:

Public Member Functions
	TcpFastRetrTest (TypeId congControl, uint32_t seqToKill, const std::string &msg)

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

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

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

void	PktDropped (const Ipv4Header &ipH, const TcpHeader &tcpH)

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	RTOExpired (const Ptr< const TcpSocketState > tcb, SocketWho who)
	Rto has expired. 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 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< TcpSocketMsgBase >	CreateSocket (Ptr< Node > node, TypeId socketType, TypeId congControl)
	Create a socket. More...

virtual void	CWndTrace (uint32_t oldValue, uint32_t newValue)
	Congestion window changes. 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...

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

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

uint32_t	m_countRetr

uint32_t	m_dupAckReceived

Ptr< TcpSeqErrorModel >	m_errorModel

bool	m_pktDropped

bool	m_pktWasDropped

SequenceNumber32	m_previousAck

SequenceNumber32	m_rcvNextExpAck

uint32_t	m_seqToKill

SequenceNumber32	m_sndNextExpSeq

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 fast retransmission.

Checking what is happening is not so easy, so there are a lot of variables which helps to keep track on what is happening. The idea is following sequence and ack numbers which are exchanged, testing if they are the same as the implementation transmits.

Definition at line 36 of file tcp-fast-retr-test.h.

Constructor & Destructor Documentation

ns3::TcpFastRetrTest::TcpFastRetrTest	(	TypeId	congControl,
		uint32_t	seqToKill,
		const std::string &	msg
	)

Definition at line 28 of file tcp-fast-retr-test.cc.

Member Function Documentation

void ns3::TcpFastRetrTest::CongStateTrace	(	const TcpSocketState::TcpCongState_t	oldValue,
		const TcpSocketState::TcpCongState_t	newValue
	)

protectedvirtual

State on Ack state machine changes.

Parameters

oldValue	old value
newValue	new value

Reimplemented from ns3::TcpGeneralTest.

Definition at line 305 of file tcp-fast-retr-test.cc.

References ns3::TcpSocketState::CA_DISORDER, ns3::TcpSocketState::CA_OPEN, ns3::TcpSocketState::CA_RECOVERY, ns3::TcpGeneralTest::GetDupAckCount(), ns3::TcpGeneralTest::GetReTxThreshold(), NS_LOG_FUNCTION, NS_TEST_ASSERT_MSG_EQ, and ns3::TcpGeneralTest::SENDER.

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Ptr< ErrorModel > ns3::TcpFastRetrTest::CreateReceiverErrorModel ( )

virtual

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

Returns: receiver error model

Reimplemented from ns3::TcpGeneralTest.

Definition at line 50 of file tcp-fast-retr-test.cc.

References m_errorModel, m_seqToKill, ns3::MakeCallback(), and PktDropped().

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Ptr< ErrorModel > ns3::TcpFastRetrTest::CreateSenderErrorModel ( )

virtual

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

Returns: sender error model

Reimplemented from ns3::TcpGeneralTest.

Definition at line 44 of file tcp-fast-retr-test.cc.

Ptr< TcpSocketMsgBase > ns3::TcpFastRetrTest::CreateSenderSocket ( Ptr< Node > node )

virtual

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 61 of file tcp-fast-retr-test.cc.

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

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void ns3::TcpFastRetrTest::FinalChecks ( )

protectedvirtual

Performs the (eventual) final checks through test asserts.

Reimplemented from ns3::TcpGeneralTest.

Definition at line 343 of file tcp-fast-retr-test.cc.

References ns3::SequenceNumber< NUMERIC_TYPE, SIGNED_TYPE >::GetValue(), m_countRetr, m_pktWasDropped, m_rcvNextExpAck, and NS_TEST_ASSERT_MSG_EQ.

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void ns3::TcpFastRetrTest::PktDropped	(	const Ipv4Header &	ipH,
		const TcpHeader &	tcpH
	)

protected

Definition at line 331 of file tcp-fast-retr-test.cc.

References ns3::TcpHeader::GetSequenceNumber(), m_pktDropped, m_rcvNextExpAck, m_seqToKill, NS_LOG_FUNCTION, and NS_TEST_ASSERT_MSG_EQ.

Referenced by CreateReceiverErrorModel().

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void ns3::TcpFastRetrTest::ProcessedAck	(	const Ptr< const TcpSocketState >	tcb,
		const TcpHeader &	h,
		SocketWho	who
	)

protectedvirtual

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 256 of file tcp-fast-retr-test.cc.

References ns3::TcpSocketState::CA_DISORDER, ns3::TcpSocketState::CA_OPEN, ns3::TcpSocketState::CA_RECOVERY, ns3::TcpHeader::GetAckNumber(), ns3::GetCongStateFrom(), ns3::TcpGeneralTest::GetDupAckCount(), ns3::TcpGeneralTest::GetReTxThreshold(), ns3::SequenceNumber< NUMERIC_TYPE, SIGNED_TYPE >::GetValue(), m_dupAckReceived, m_pktWasDropped, m_previousAck, NS_LOG_FUNCTION, NS_TEST_ASSERT_MSG_EQ, NS_TEST_ASSERT_MSG_GT_OR_EQ, ns3::TcpGeneralTest::RECEIVER, and ns3::TcpGeneralTest::SENDER.

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void ns3::TcpFastRetrTest::RcvAck	(	const Ptr< const TcpSocketState >	tcb,
		const TcpHeader &	h,
		SocketWho	who
	)

protectedvirtual

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 210 of file tcp-fast-retr-test.cc.

References ns3::TcpSocketState::CA_DISORDER, ns3::TcpSocketState::CA_OPEN, ns3::TcpSocketState::CA_RECOVERY, ns3::TcpHeader::GetAckNumber(), ns3::GetCongStateFrom(), ns3::TcpGeneralTest::GetDupAckCount(), ns3::TcpGeneralTest::GetReTxThreshold(), ns3::SequenceNumber< NUMERIC_TYPE, SIGNED_TYPE >::GetValue(), m_dupAckReceived, m_seqToKill, NS_LOG_FUNCTION, NS_TEST_ASSERT_MSG_EQ, ns3::TcpGeneralTest::RECEIVER, and ns3::TcpGeneralTest::SENDER.

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void ns3::TcpFastRetrTest::RTOExpired	(	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 299 of file tcp-fast-retr-test.cc.

References NS_ASSERT_MSG.

void ns3::TcpFastRetrTest::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 70 of file tcp-fast-retr-test.cc.

References ns3::TcpGeneralTest::GetSegSize(), ns3::TcpHeader::GetSequenceNumber(), ns3::SequenceNumber< NUMERIC_TYPE, SIGNED_TYPE >::GetValue(), m_bytesRcvButNotAcked, m_pktDropped, m_rcvNextExpAck, m_seqToKill, NS_LOG_INFO, ns3::TcpGeneralTest::RECEIVER, and ns3::TcpGeneralTest::SENDER.

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void ns3::TcpFastRetrTest::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 101 of file tcp-fast-retr-test.cc.

References ns3::TcpHeader::ACK, ns3::TcpHeader::GetAckNumber(), ns3::TcpGeneralTest::GetDelAckCount(), ns3::TcpHeader::GetFlags(), ns3::TcpGeneralTest::GetSegSize(), ns3::TcpHeader::GetSequenceNumber(), ns3::Packet::GetSize(), ns3::SequenceNumber< NUMERIC_TYPE, SIGNED_TYPE >::GetValue(), m_countRetr, m_pktDropped, m_rcvNextExpAck, m_seqToKill, m_sndNextExpSeq, NS_LOG_INFO, NS_TEST_ASSERT_MSG_EQ, ns3::TcpGeneralTest::RECEIVER, ns3::TcpGeneralTest::SENDER, and ns3::TcpHeader::SYN.

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Member Data Documentation

uint32_t ns3::TcpFastRetrTest::m_bytesRcvButNotAcked

protected

Definition at line 74 of file tcp-fast-retr-test.h.

Referenced by Rx().

uint32_t ns3::TcpFastRetrTest::m_countRetr

protected

Definition at line 72 of file tcp-fast-retr-test.h.

Referenced by FinalChecks(), and Tx().

uint32_t ns3::TcpFastRetrTest::m_dupAckReceived

protected

Definition at line 66 of file tcp-fast-retr-test.h.

Referenced by ProcessedAck(), and RcvAck().

Ptr<TcpSeqErrorModel> ns3::TcpFastRetrTest::m_errorModel

protected

Definition at line 76 of file tcp-fast-retr-test.h.

Referenced by CreateReceiverErrorModel().

bool ns3::TcpFastRetrTest::m_pktDropped

protected

Definition at line 63 of file tcp-fast-retr-test.h.

Referenced by PktDropped(), Rx(), and Tx().

bool ns3::TcpFastRetrTest::m_pktWasDropped

protected

Definition at line 64 of file tcp-fast-retr-test.h.

Referenced by FinalChecks(), and ProcessedAck().

SequenceNumber32 ns3::TcpFastRetrTest::m_previousAck

protected

Definition at line 68 of file tcp-fast-retr-test.h.

Referenced by ProcessedAck().

SequenceNumber32 ns3::TcpFastRetrTest::m_rcvNextExpAck

protected

Definition at line 70 of file tcp-fast-retr-test.h.

Referenced by FinalChecks(), PktDropped(), Rx(), and Tx().

uint32_t ns3::TcpFastRetrTest::m_seqToKill

protected

Definition at line 65 of file tcp-fast-retr-test.h.

Referenced by CreateReceiverErrorModel(), PktDropped(), RcvAck(), Rx(), and Tx().

SequenceNumber32 ns3::TcpFastRetrTest::m_sndNextExpSeq

protected

Definition at line 69 of file tcp-fast-retr-test.h.

Referenced by Tx().

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

src/internet/test/tcp-fast-retr-test.h
src/internet/test/tcp-fast-retr-test.cc

Public Member Functions

Protected Member Functions

Protected Attributes

Additional Inherited Members

Detailed Description

Constructor & Destructor Documentation

Member Function Documentation

Member Data Documentation