Test to validate cWnd increment/decrement in LEDBAT Congestion Avoidance Phase. More...

Inheritance diagram for TcpLedbatCongestionAvoidanceTest:

Collaboration diagram for TcpLedbatCongestionAvoidanceTest:

Public Types
enum	TestType { INCREMENT_TEST , MAX_CWND_TEST , DECREMENT_TEST , MIN_CWND_TEST }
	Type of expected CWND behavior in LEDBAT congestion avoidance. 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...

Public Member Functions
	TcpLedbatCongestionAvoidanceTest (uint32_t cWnd, uint32_t segmentSize, uint32_t ssThresh, uint32_t segmentsAcked, uint32_t bytesInFlight, Time rtt, uint32_t rcvTimestampValue, uint32_t currentRcvTimestampEchoReply, TestType testType, const std::string &name)
	Constructor.
Public Member Functions inherited from ns3::TestCase
	TestCase (const TestCase &)=delete
	Caller graph was not generated because of its size.
virtual	~TestCase ()
	Destructor.
std::string	GetName () const
TestCase &	operator= (const TestCase &)=delete

Private Member Functions
void	DoRun () override
	Implementation to actually run this TestCase.

Private Attributes
uint32_t	m_bytesInFlight
	bytes in flight (after ACK)
uint32_t	m_currentRcvTimestampEchoReply
	current echoed timestamp value
uint32_t	m_cWnd
	cWnd
uint32_t	m_rcvTimestampValue
	received timestamp value
Time	m_rtt
	rtt
uint32_t	m_segmentsAcked
	segments acked
uint32_t	m_segmentSize
	segment size
uint32_t	m_ssThresh
	ss thresh
Ptr< TcpSocketState >	m_state
	state
TestType	m_testType
	test type

Additional Inherited Members
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.

Detailed Description

Test to validate cWnd increment/decrement in LEDBAT Congestion Avoidance Phase.

Definition at line 109 of file tcp-ledbat-test.cc.

Member Enumeration Documentation

◆ TestType

enum TcpLedbatCongestionAvoidanceTest::TestType

Type of expected CWND behavior in LEDBAT congestion avoidance.

Enumerator
INCREMENT_TEST	To enable check for CWND increases because the measured queue delay is below the target delay (positive offset).
MAX_CWND_TEST	To enable check that CWND increase is limited by the maximum allowed CWND, computed from flight size before ack (bytesInFlight + segmentsAcked * segmentSize).
DECREMENT_TEST	To enable check for CWND decreases because the measured queue delay is above the target delay (negative offset).
MIN_CWND_TEST	To enable check that CWND decrease is limited by the minimum CWND constraint (MinCwnd × segmentSize).

Definition at line 115 of file tcp-ledbat-test.cc.

Constructor & Destructor Documentation

◆ TcpLedbatCongestionAvoidanceTest()

TcpLedbatCongestionAvoidanceTest::TcpLedbatCongestionAvoidanceTest	(	uint32_t	cWnd,
		uint32_t	segmentSize,
		uint32_t	ssThresh,
		uint32_t	segmentsAcked,
		uint32_t	bytesInFlight,
		Time	rtt,
		uint32_t	rcvTimestampValue,
		uint32_t	currentRcvTimestampEchoReply,
		TestType	testType,
		const std::string &	name )

Constructor.

Parameters

cWnd	congestion window
segmentSize	segment size
ssThresh	slow start threshold
segmentsAcked	segments acked
bytesInFlight	bytes in flight
rtt	RTT
rcvTimestampValue	Receive timestamp for delay estimation
currentRcvTimestampEchoReply	Echo reply timestamp for current delay
testType	Expected test behavior
name	Name of the test

Definition at line 183 of file tcp-ledbat-test.cc.

References ns3::TestCase::TestCase(), m_bytesInFlight, m_currentRcvTimestampEchoReply, m_cWnd, m_rcvTimestampValue, m_rtt, m_segmentsAcked, m_segmentSize, m_ssThresh, m_testType, and segmentSize.

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Member Function Documentation

◆ DoRun()

void TcpLedbatCongestionAvoidanceTest::DoRun ( )

overrideprivatevirtual

Implementation to actually run this TestCase.

Subclasses should override this method to conduct their tests.

Implements ns3::TestCase.

Definition at line 208 of file tcp-ledbat-test.cc.

References ns3::CreateObject(), DECREMENT_TEST, INCREMENT_TEST, m_bytesInFlight, m_currentRcvTimestampEchoReply, m_cWnd, m_rcvTimestampValue, m_rtt, m_segmentsAcked, m_segmentSize, m_ssThresh, m_state, m_testType, MAX_CWND_TEST, MIN_CWND_TEST, NS_FATAL_ERROR, and NS_TEST_ASSERT_MSG_EQ.

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Member Data Documentation

◆ m_bytesInFlight

uint32_t TcpLedbatCongestionAvoidanceTest::m_bytesInFlight

private

bytes in flight (after ACK)

Definition at line 176 of file tcp-ledbat-test.cc.

Referenced by TcpLedbatCongestionAvoidanceTest(), and DoRun().

◆ m_currentRcvTimestampEchoReply

uint32_t TcpLedbatCongestionAvoidanceTest::m_currentRcvTimestampEchoReply

private

current echoed timestamp value

Definition at line 178 of file tcp-ledbat-test.cc.

Referenced by TcpLedbatCongestionAvoidanceTest(), and DoRun().

◆ m_cWnd

uint32_t TcpLedbatCongestionAvoidanceTest::m_cWnd

private

cWnd

Definition at line 171 of file tcp-ledbat-test.cc.

Referenced by TcpLedbatCongestionAvoidanceTest(), and DoRun().

◆ m_rcvTimestampValue

uint32_t TcpLedbatCongestionAvoidanceTest::m_rcvTimestampValue

private

received timestamp value

Definition at line 177 of file tcp-ledbat-test.cc.

Referenced by TcpLedbatCongestionAvoidanceTest(), and DoRun().

◆ m_rtt

Time TcpLedbatCongestionAvoidanceTest::m_rtt

private

rtt

Definition at line 175 of file tcp-ledbat-test.cc.

Referenced by TcpLedbatCongestionAvoidanceTest(), and DoRun().

◆ m_segmentsAcked

uint32_t TcpLedbatCongestionAvoidanceTest::m_segmentsAcked

private

segments acked

Definition at line 173 of file tcp-ledbat-test.cc.

Referenced by TcpLedbatCongestionAvoidanceTest(), and DoRun().

◆ m_segmentSize

uint32_t TcpLedbatCongestionAvoidanceTest::m_segmentSize

private

segment size

Definition at line 172 of file tcp-ledbat-test.cc.

Referenced by TcpLedbatCongestionAvoidanceTest(), and DoRun().

◆ m_ssThresh

uint32_t TcpLedbatCongestionAvoidanceTest::m_ssThresh

private

ss thresh

Definition at line 174 of file tcp-ledbat-test.cc.

Referenced by TcpLedbatCongestionAvoidanceTest(), and DoRun().

◆ m_state

Ptr<TcpSocketState> TcpLedbatCongestionAvoidanceTest::m_state

private

state

Definition at line 180 of file tcp-ledbat-test.cc.

Referenced by DoRun().

◆ m_testType

TestType TcpLedbatCongestionAvoidanceTest::m_testType

private

test type

Definition at line 179 of file tcp-ledbat-test.cc.

Referenced by TcpLedbatCongestionAvoidanceTest(), and DoRun().

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

src/internet/test/tcp-ledbat-test.cc

Public Types

Public Member Functions

Private Member Functions

Private Attributes

Additional Inherited Members

Detailed Description

Member Enumeration Documentation

◆ TestType

Constructor & Destructor Documentation

◆ TcpLedbatCongestionAvoidanceTest()

Member Function Documentation

◆ DoRun()

Member Data Documentation

◆ m_bytesInFlight

◆ m_currentRcvTimestampEchoReply

◆ m_cWnd

◆ m_rcvTimestampValue

◆ m_rtt

◆ m_segmentsAcked

◆ m_segmentSize

◆ m_ssThresh

◆ m_state

◆ m_testType