This class implements the Path MTU cache, as defined by RFC 1981 . More...

#include "ipv6-pmtu-cache.h"

Inheritance diagram for ns3::Ipv6PmtuCache:

Collaboration diagram for ns3::Ipv6PmtuCache:

Public Member Functions
	Ipv6PmtuCache ()
	Constructor.

	~Ipv6PmtuCache () override
	Destructor.

void	DoDispose () override
	Dispose object.

uint32_t	GetPmtu (Ipv6Address dst)
	Gets the known Path MTU for the specific destination.

Time	GetPmtuValidityTime () const
	Gets the Path MTU validity time.

void	SetPmtu (Ipv6Address dst, uint32_t pmtu)
	Sets the Path MTU for the specific destination.

bool	SetPmtuValidityTime (Time validity)
	Sets the Path MTU validity time (minimum is 5 minutes)

Public Member Functions inherited from ns3::Object
	Object ()
	Constructor.

	~Object () override
	Destructor.

void	AggregateObject (Ptr< Object > other)
	Aggregate two Objects together.

void	Dispose ()
	Dispose of this Object.

AggregateIterator	GetAggregateIterator () const
	Get an iterator to the Objects aggregated to this one.

TypeId	GetInstanceTypeId () const override
	Get the most derived TypeId for this Object.

template<typename T >
Ptr< T >	GetObject () const
	Get a pointer to the requested aggregated Object.

template<>
Ptr< Object >	GetObject () const
	Specialization of () for objects of type ns3::Object.

template<typename T >
Ptr< T >	GetObject (TypeId tid) const
	Get a pointer to the requested aggregated Object by TypeId.

template<>
Ptr< Object >	GetObject (TypeId tid) const
	Specialization of (TypeId tid) for objects of type ns3::Object.

void	Initialize ()
	Invoke DoInitialize on all Objects aggregated to this one.

bool	IsInitialized () const
	Check if the object has been initialized.

void	UnidirectionalAggregateObject (Ptr< Object > other)
	Aggregate an Object to another Object.

Public Member Functions inherited from ns3::SimpleRefCount< Object, ObjectBase, ObjectDeleter >
	SimpleRefCount ()
	Default constructor.

	SimpleRefCount (const SimpleRefCount &o)
	Copy constructor.

uint32_t	GetReferenceCount () const
	Get the reference count of the object.

SimpleRefCount &	operator= (const SimpleRefCount &o)
	Assignment operator.

void	Ref () const
	Increment the reference count.

void	Unref () const
	Decrement the reference count.

Public Member Functions inherited from ns3::ObjectBase
virtual	~ObjectBase ()
	Virtual destructor.

void	GetAttribute (std::string name, AttributeValue &value, bool permissive=false) const
	Get the value of an attribute, raising fatal errors if unsuccessful.

bool	GetAttributeFailSafe (std::string name, AttributeValue &value) const
	Get the value of an attribute without raising errors.

void	SetAttribute (std::string name, const AttributeValue &value)
	Set a single attribute, raising fatal errors if unsuccessful.

bool	SetAttributeFailSafe (std::string name, const AttributeValue &value)
	Set a single attribute without raising errors.

bool	TraceConnect (std::string name, std::string context, const CallbackBase &cb)
	Connect a TraceSource to a Callback with a context.

bool	TraceConnectWithoutContext (std::string name, const CallbackBase &cb)
	Connect a TraceSource to a Callback without a context.

bool	TraceDisconnect (std::string name, std::string context, const CallbackBase &cb)
	Disconnect from a TraceSource a Callback previously connected with a context.

bool	TraceDisconnectWithoutContext (std::string name, const CallbackBase &cb)
	Disconnect from a TraceSource a Callback previously connected without a context.

Static Public Member Functions
static TypeId	GetTypeId ()
	Get the type ID.

Static Public Member Functions inherited from ns3::Object
static TypeId	GetTypeId ()
	Register this type.

Static Public Member Functions inherited from ns3::ObjectBase
static TypeId	GetTypeId ()
	Get the type ID.

Private Types
typedef std::map< Ipv6Address, EventId >::iterator	pathMtuTimerIter
	Container of the IPv6 PMTU data (Ipv6 destination address and expiration event).

Private Member Functions
void	ClearPmtu (Ipv6Address dst)
	Clears the Path MTU for the specific destination.

Private Attributes
std::map< Ipv6Address, uint32_t >	m_pathMtu
	Path MTU table.

std::map< Ipv6Address, EventId >	m_pathMtuTimer
	Path MTU Expiration table.

Time	m_validityTime
	Path MTU entry validity time.

Additional Inherited Members
Protected Member Functions inherited from ns3::Object
	Object (const Object &o)
	Copy an Object.

virtual void	DoInitialize ()
	Initialize() implementation.

virtual void	NotifyNewAggregate ()
	Notify all Objects aggregated to this one of a new Object being aggregated.

Protected Member Functions inherited from ns3::ObjectBase
void	ConstructSelf (const AttributeConstructionList &attributes)
	Complete construction of ObjectBase; invoked by derived classes.

virtual void	NotifyConstructionCompleted ()
	Notifier called once the ObjectBase is fully constructed.

Related Symbols inherited from ns3::ObjectBase
static TypeId	GetObjectIid ()
	Ensure the TypeId for ObjectBase gets fully configured to anchor the inheritance tree properly.

Detailed Description

This class implements the Path MTU cache, as defined by RFC 1981 .

The Path MTU is stored according to the destination address, and it is cleared upon expiration (default validity time is 10 minutes).

The "infinite lifetime" PMTU entry type is not implemented, since it is useful only in an very limited number of cases. See the RFC for further details.

Definition at line 36 of file ipv6-pmtu-cache.h.

Member Typedef Documentation

◆ pathMtuTimerIter

typedef std::map<Ipv6Address,EventId>::iterator ns3::Ipv6PmtuCache::pathMtuTimerIter

private

Container of the IPv6 PMTU data (Ipv6 destination address and expiration event).

Definition at line 104 of file ipv6-pmtu-cache.h.

Constructor & Destructor Documentation

◆ Ipv6PmtuCache()

ns3::Ipv6PmtuCache::Ipv6PmtuCache ( )

Constructor.

Definition at line 37 of file ipv6-pmtu-cache.cc.

◆ ~Ipv6PmtuCache()

ns3::Ipv6PmtuCache::~Ipv6PmtuCache ( )

override

Destructor.

Definition at line 41 of file ipv6-pmtu-cache.cc.

Member Function Documentation

◆ ClearPmtu()

void ns3::Ipv6PmtuCache::ClearPmtu ( Ipv6Address dst )

private

Clears the Path MTU for the specific destination.

Parameters

dst	the destination

Definition at line 106 of file ipv6-pmtu-cache.cc.

References m_pathMtu, m_pathMtuTimer, and NS_LOG_FUNCTION.

Referenced by SetPmtu().

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◆ DoDispose()

void ns3::Ipv6PmtuCache::DoDispose ( )

overridevirtual

Dispose object.

Reimplemented from ns3::Object.

Definition at line 46 of file ipv6-pmtu-cache.cc.

References m_pathMtu, and m_pathMtuTimer.

◆ GetPmtu()

uint32_t ns3::Ipv6PmtuCache::GetPmtu ( Ipv6Address dst )

Gets the known Path MTU for the specific destination.

Parameters

dst	the destination

Returns: the Path MTU (zero if unknown)

Definition at line 57 of file ipv6-pmtu-cache.cc.

References m_pathMtu, and NS_LOG_FUNCTION.

◆ GetPmtuValidityTime()

Time ns3::Ipv6PmtuCache::GetPmtuValidityTime ( ) const

Gets the Path MTU validity time.

Returns: the Path MTU validity time

Definition at line 84 of file ipv6-pmtu-cache.cc.

References m_validityTime, and NS_LOG_FUNCTION.

◆ GetTypeId()

TypeId ns3::Ipv6PmtuCache::GetTypeId ( )

static

Get the type ID.

Returns: type ID

Definition at line 22 of file ipv6-pmtu-cache.cc.

References m_validityTime, ns3::MakeTimeAccessor(), ns3::MakeTimeChecker(), ns3::Seconds(), and ns3::TypeId::SetParent().

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◆ SetPmtu()

void ns3::Ipv6PmtuCache::SetPmtu	(	Ipv6Address	dst,
		uint32_t	pmtu )

Sets the Path MTU for the specific destination.

Parameters

dst	the destination
pmtu	the Path MTU

Definition at line 69 of file ipv6-pmtu-cache.cc.

References ClearPmtu(), m_pathMtu, m_pathMtuTimer, m_validityTime, NS_LOG_FUNCTION, and ns3::Simulator::Schedule().

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◆ SetPmtuValidityTime()

bool ns3::Ipv6PmtuCache::SetPmtuValidityTime ( Time validity )

Sets the Path MTU validity time (minimum is 5 minutes)

Parameters

validity the Path MTU validity time

Returns: true if the change was successful

Definition at line 91 of file ipv6-pmtu-cache.cc.

References m_validityTime, NS_LOG_FUNCTION, NS_LOG_LOGIC, and ns3::Seconds().

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Member Data Documentation

◆ m_pathMtu

std::map<Ipv6Address, uint32_t> ns3::Ipv6PmtuCache::m_pathMtu

private

Path MTU table.

Definition at line 99 of file ipv6-pmtu-cache.h.

Referenced by ClearPmtu(), DoDispose(), GetPmtu(), and SetPmtu().

◆ m_pathMtuTimer

std::map<Ipv6Address, EventId> ns3::Ipv6PmtuCache::m_pathMtuTimer

private

Path MTU Expiration table.

Definition at line 109 of file ipv6-pmtu-cache.h.

Referenced by ClearPmtu(), DoDispose(), and SetPmtu().

◆ m_validityTime

Time ns3::Ipv6PmtuCache::m_validityTime

private

Path MTU entry validity time.

Definition at line 114 of file ipv6-pmtu-cache.h.

Referenced by GetPmtuValidityTime(), GetTypeId(), SetPmtu(), and SetPmtuValidityTime().

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

src/internet/model/ipv6-pmtu-cache.h
src/internet/model/ipv6-pmtu-cache.cc

Public Member Functions

Static Public Member Functions

Private Types

Private Member Functions

Private Attributes

Additional Inherited Members

Detailed Description

Member Typedef Documentation

◆ pathMtuTimerIter

Constructor & Destructor Documentation

◆ Ipv6PmtuCache()

◆ ~Ipv6PmtuCache()

Member Function Documentation

◆ ClearPmtu()

◆ DoDispose()

◆ GetPmtu()

◆ GetPmtuValidityTime()

◆ GetTypeId()

◆ SetPmtu()

◆ SetPmtuValidityTime()

Member Data Documentation

◆ m_pathMtu

◆ m_pathMtuTimer

◆ m_validityTime