Nix-vector routing protocol. More...

#include "ipv4-nix-vector-routing.h"

Inheritance diagram for ns3::Ipv4NixVectorRouting:

Collaboration diagram for ns3::Ipv4NixVectorRouting:

Public Member Functions
	Ipv4NixVectorRouting ()

	~Ipv4NixVectorRouting ()

void	FlushGlobalNixRoutingCache (void) const
	Called when run-time link topology change occurs which iterates through the node list and flushes any nix vector caches. More...

void	SetNode (Ptr< Node > node)
	Set the Node pointer of the node for which this routing protocol is to be placed. More...

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

virtual	~Object ()
	Destructor. More...

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

void	Dispose (void)
	Dispose of this Object. More...

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

virtual TypeId	GetInstanceTypeId (void) const
	Implement the GetInstanceTypeId method defined in ObjectBase. More...

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

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

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

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

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

	SimpleRefCount (const SimpleRefCount &o)
	Copy constructor. More...

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

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

void	Ref (void) const
	Increment the reference count. More...

void	Unref (void) const
	Decrement the reference count. More...

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

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

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

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

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

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

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

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

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

Static Public Member Functions
static TypeId	GetTypeId (void)
	The Interface ID of the Global Router interface. More...

Static Public Member Functions inherited from ns3::Ipv4RoutingProtocol
static TypeId	GetTypeId (void)
	Get the type ID. More...

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

Static Public Member Functions inherited from ns3::SimpleRefCount< Object, ObjectBase, ObjectDeleter >
static void	Cleanup (void)
	Noop. More...

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

Private Member Functions
bool	BFS (uint32_t numberOfNodes, Ptr< Node > source, Ptr< Node > dest, std::vector< Ptr< Node > > &parentVector, Ptr< NetDevice > oif)

bool	BuildNixVector (const std::vector< Ptr< Node > > &parentVector, uint32_t source, uint32_t dest, Ptr< NixVector > nixVector)

bool	BuildNixVectorLocal (Ptr< NixVector > nixVector)

void	CheckCacheStateAndFlush (void) const

void	DoDispose (void)
	Destructor implementation. More...

uint32_t	FindNetDeviceForNixIndex (uint32_t nodeIndex, Ipv4Address &gatewayIp)

uint32_t	FindTotalNeighbors (void)

void	FlushIpv4RouteCache (void) const

void	FlushNixCache (void) const

void	GetAdjacentNetDevices (Ptr< NetDevice >, Ptr< Channel >, NetDeviceContainer &)

Ptr< Ipv4Route >	GetIpv4RouteInCache (Ipv4Address)

Ptr< NixVector >	GetNixVector (Ptr< Node >, Ipv4Address, Ptr< NetDevice >)

Ptr< NixVector >	GetNixVectorInCache (Ipv4Address)

Ptr< Node >	GetNodeByIp (Ipv4Address)

Ptr< BridgeNetDevice >	NetDeviceIsBridged (Ptr< NetDevice > nd) const

virtual void	NotifyAddAddress (uint32_t interface, Ipv4InterfaceAddress address)

virtual void	NotifyInterfaceDown (uint32_t interface)

virtual void	NotifyInterfaceUp (uint32_t interface)

virtual void	NotifyRemoveAddress (uint32_t interface, Ipv4InterfaceAddress address)

virtual void	PrintRoutingTable (Ptr< OutputStreamWrapper > stream) const
	Print the Routing Table entries. More...

void	ResetTotalNeighbors (void)

virtual bool	RouteInput (Ptr< const Packet > p, const Ipv4Header &header, Ptr< const NetDevice > idev, UnicastForwardCallback ucb, MulticastForwardCallback mcb, LocalDeliverCallback lcb, ErrorCallback ecb)
	Route an input packet (to be forwarded or locally delivered) More...

virtual Ptr< Ipv4Route >	RouteOutput (Ptr< Packet > p, const Ipv4Header &header, Ptr< NetDevice > oif, Socket::SocketErrno &sockerr)
	Query routing cache for an existing route, for an outbound packet. More...

virtual void	SetIpv4 (Ptr< Ipv4 > ipv4)

Private Attributes
Ptr< Ipv4 >	m_ipv4

Ipv4RouteMap_t	m_ipv4RouteCache

NixMap_t	m_nixCache

Ptr< Node >	m_node

uint32_t	m_totalNeighbors

Static Private Attributes
static bool	g_isCacheDirty = false

Additional Inherited Members
Public Types inherited from ns3::Ipv4RoutingProtocol
typedef Callback< void, Ptr< const Packet >, const Ipv4Header &, Socket::SocketErrno >	ErrorCallback
	Callback for routing errors (e.g., no route found) More...

typedef Callback< void, Ptr< const Packet >, const Ipv4Header &, uint32_t >	LocalDeliverCallback
	Callback for packets to be locally delivered. More...

typedef Callback< void, Ptr< Ipv4MulticastRoute >, Ptr< const Packet >, const Ipv4Header & >	MulticastForwardCallback
	Callback for multicast packets to be forwarded. More...

typedef Callback< void, Ptr< Ipv4Route >, Ptr< const Packet >, const Ipv4Header & >	UnicastForwardCallback
	Callback for unicast packets to be forwarded. More...

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

virtual void	DoInitialize (void)
	Initialize() implementation. More...

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

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

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

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

Detailed Description

Nix-vector routing protocol.

Config Paths

ns3::Ipv4NixVectorRouting is accessible through the following paths with Config::Set and Config::Connect:

"/NodeList/[i]/$ns3::Ipv4NixVectorRouting"

No Attributes are defined for this type.
No TraceSources are defined for this type.
Size of this type is 152 bytes (on a 64-bit architecture).

Definition at line 52 of file ipv4-nix-vector-routing.h.

Constructor & Destructor Documentation

ns3::Ipv4NixVectorRouting::Ipv4NixVectorRouting ( )

Definition at line 50 of file ipv4-nix-vector-routing.cc.

References NS_LOG_FUNCTION_NOARGS.

ns3::Ipv4NixVectorRouting::~Ipv4NixVectorRouting ( )

Definition at line 56 of file ipv4-nix-vector-routing.cc.

References NS_LOG_FUNCTION_NOARGS.

Member Function Documentation

bool ns3::Ipv4NixVectorRouting::BFS	(	uint32_t	numberOfNodes,
		Ptr< Node >	source,
		Ptr< Node >	dest,
		std::vector< Ptr< Node > > &	parentVector,
		Ptr< NetDevice >	oif
	)

private

Definition at line 774 of file ipv4-nix-vector-routing.cc.

References ns3::NetDeviceContainer::Begin(), third::channel, ns3::NetDeviceContainer::End(), GetAdjacentNetDevices(), ns3::Node::GetDevice(), ns3::Node::GetId(), ns3::Node::GetNDevices(), ns3::Object::GetObject(), NS_LOG_FUNCTION_NOARGS, and NS_LOG_LOGIC.

Referenced by GetNixVector().

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bool ns3::Ipv4NixVectorRouting::BuildNixVector	(	const std::vector< Ptr< Node > > &	parentVector,
		uint32_t	source,
		uint32_t	dest,
		Ptr< NixVector >	nixVector
	)

private

Definition at line 233 of file ipv4-nix-vector-routing.cc.

References ns3::NixVector::AddNeighborIndex(), ns3::NetDeviceContainer::Begin(), ns3::NixVector::BitCount(), third::channel, ns3::NetDeviceContainer::End(), GetAdjacentNetDevices(), ns3::Node::GetDevice(), ns3::Node::GetId(), ns3::NetDeviceContainer::GetN(), ns3::Node::GetNDevices(), NS_LOG_FUNCTION_NOARGS, and NS_LOG_LOGIC.

Referenced by GetNixVector().

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bool ns3::Ipv4NixVectorRouting::BuildNixVectorLocal ( Ptr< NixVector > nixVector )

private

Definition at line 206 of file ipv4-nix-vector-routing.cc.

References ns3::NixVector::AddNeighborIndex(), ns3::NixVector::BitCount(), ns3::Node::GetDevice(), ns3::Node::GetId(), ns3::Ipv4InterfaceAddress::GetLocal(), ns3::Node::GetNDevices(), m_ipv4, m_node, NS_LOG_FUNCTION_NOARGS, and NS_LOG_LOGIC.

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void ns3::Ipv4NixVectorRouting::CheckCacheStateAndFlush ( void ) const

private

Definition at line 922 of file ipv4-nix-vector-routing.cc.

References FlushGlobalNixRoutingCache(), and g_isCacheDirty.

Referenced by GetIpv4RouteInCache(), GetNixVectorInCache(), PrintRoutingTable(), RouteInput(), and RouteOutput().

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void ns3::Ipv4NixVectorRouting::DoDispose ( void )

privatevirtual

Destructor implementation.

This method is called by Dispose() or by the Object's destructor, whichever comes first.

Subclasses are expected to implement their real destruction code in an overriden version of this method and chain up to their parent's implementation once they are done. i.e, for simplicity, the destructor of every subclass should be empty and its content should be moved to the associated DoDispose() method.

It is safe to call GetObject() from within this method.

Reimplemented from ns3::Object.

Definition at line 72 of file ipv4-nix-vector-routing.cc.

References ns3::Object::DoDispose(), m_ipv4, m_node, and NS_LOG_FUNCTION_NOARGS.

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uint32_t ns3::Ipv4NixVectorRouting::FindNetDeviceForNixIndex	(	uint32_t	nodeIndex,
		Ipv4Address &	gatewayIp
	)

private

Definition at line 445 of file ipv4-nix-vector-routing.cc.

References third::channel, ns3::NetDeviceContainer::Get(), GetAdjacentNetDevices(), ns3::Node::GetDevice(), ns3::Ipv4InterfaceAddress::GetLocal(), ns3::NetDeviceContainer::GetN(), ns3::Node::GetNDevices(), ns3::Object::GetObject(), and m_node.

Referenced by RouteInput(), and RouteOutput().

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uint32_t ns3::Ipv4NixVectorRouting::FindTotalNeighbors ( void )

private

Definition at line 374 of file ipv4-nix-vector-routing.cc.

References third::channel, GetAdjacentNetDevices(), ns3::Node::GetDevice(), ns3::NetDeviceContainer::GetN(), ns3::Node::GetNDevices(), and m_node.

Referenced by RouteInput(), and RouteOutput().

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void ns3::Ipv4NixVectorRouting::FlushGlobalNixRoutingCache ( void ) const

Called when run-time link topology change occurs which iterates through the node list and flushes any nix vector caches.

Internal:: const is used here due to need to potentially flush the cache in const methods such as PrintRoutingTable. Caches are stored in mutable variables and flushed in const methods.

Definition at line 92 of file ipv4-nix-vector-routing.cc.

References ns3::NodeList::Begin(), ns3::NodeList::End(), ns3::Object::GetObject(), NS_LOG_FUNCTION_NOARGS, and NS_LOG_LOGIC.

Referenced by CheckCacheStateAndFlush().

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void ns3::Ipv4NixVectorRouting::FlushIpv4RouteCache ( void ) const

private

Definition at line 118 of file ipv4-nix-vector-routing.cc.

References m_ipv4RouteCache, and NS_LOG_FUNCTION_NOARGS.

void ns3::Ipv4NixVectorRouting::FlushNixCache ( void ) const

private

Definition at line 111 of file ipv4-nix-vector-routing.cc.

References m_nixCache, and NS_LOG_FUNCTION_NOARGS.

void ns3::Ipv4NixVectorRouting::GetAdjacentNetDevices	(	Ptr< NetDevice >	netDevice,
		Ptr< Channel >	channel,
		NetDeviceContainer &	netDeviceContainer
	)

private

Definition at line 306 of file ipv4-nix-vector-routing.cc.

References ns3::NetDeviceContainer::Add(), NetDeviceIsBridged(), NS_LOG_FUNCTION_NOARGS, and NS_LOG_LOGIC.

Referenced by BFS(), BuildNixVector(), FindNetDeviceForNixIndex(), and FindTotalNeighbors().

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Ptr< Ipv4Route > ns3::Ipv4NixVectorRouting::GetIpv4RouteInCache ( Ipv4Address address )

private

Definition at line 188 of file ipv4-nix-vector-routing.cc.

References CheckCacheStateAndFlush(), m_ipv4RouteCache, NS_LOG_FUNCTION_NOARGS, and NS_LOG_LOGIC.

Referenced by RouteInput(), and RouteOutput().

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Ptr< NixVector > ns3::Ipv4NixVectorRouting::GetNixVector	(	Ptr< Node >	source,
		Ipv4Address	dest,
		Ptr< NetDevice >	oif
	)

private

Internal:: Do not process packets to self (see Bug 1308)

Definition at line 125 of file ipv4-nix-vector-routing.cc.

References BFS(), BuildNixVector(), ns3::Node::GetId(), ns3::NodeList::GetNNodes(), GetNodeByIp(), NS_LOG_DEBUG, NS_LOG_ERROR, and NS_LOG_FUNCTION_NOARGS.

Referenced by RouteOutput().

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Ptr< NixVector > ns3::Ipv4NixVectorRouting::GetNixVectorInCache ( Ipv4Address address )

private

Definition at line 170 of file ipv4-nix-vector-routing.cc.

References CheckCacheStateAndFlush(), m_nixCache, NS_LOG_FUNCTION_NOARGS, and NS_LOG_LOGIC.

Referenced by RouteOutput().

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Ptr< Node > ns3::Ipv4NixVectorRouting::GetNodeByIp ( Ipv4Address dest )

private

Definition at line 346 of file ipv4-nix-vector-routing.cc.

References ns3::NodeContainer::Begin(), ns3::NodeContainer::End(), ns3::NodeContainer::GetGlobal(), ns3::Object::GetObject(), NS_LOG_ERROR, and NS_LOG_FUNCTION_NOARGS.

Referenced by GetNixVector().

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TypeId ns3::Ipv4NixVectorRouting::GetTypeId ( void )

static

The Interface ID of the Global Router interface.

See also: Object::GetObject ()

Definition at line 40 of file ipv4-nix-vector-routing.cc.

References ns3::TypeId::SetParent().

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Ptr< BridgeNetDevice > ns3::Ipv4NixVectorRouting::NetDeviceIsBridged ( Ptr< NetDevice > nd ) const

private

Definition at line 405 of file ipv4-nix-vector-routing.cc.

References ns3::Node::GetDevice(), ns3::Node::GetNDevices(), NS_ABORT_MSG_UNLESS, NS_LOG_FUNCTION, and NS_LOG_LOGIC.

Referenced by GetAdjacentNetDevices().

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void ns3::Ipv4NixVectorRouting::NotifyAddAddress	(	uint32_t	interface,
		Ipv4InterfaceAddress	address
	)

privatevirtual

Parameters

interface	the index of the interface we are being notified about
address	a new address being added to an interface

Protocols are expected to implement this method to be notified whenever a new address is added to an interface. Typically used to add a 'network route' on an interface. Can be invoked on an up or down interface.

Implements ns3::Ipv4RoutingProtocol.

Definition at line 763 of file ipv4-nix-vector-routing.cc.

References g_isCacheDirty.

void ns3::Ipv4NixVectorRouting::NotifyInterfaceDown ( uint32_t interface )

privatevirtual

Parameters

interface the index of the interface we are being notified about

Protocols are expected to implement this method to be notified of the state change of an interface in a node.

Implements ns3::Ipv4RoutingProtocol.

Definition at line 758 of file ipv4-nix-vector-routing.cc.

References g_isCacheDirty.

void ns3::Ipv4NixVectorRouting::NotifyInterfaceUp ( uint32_t interface )

privatevirtual

Parameters

interface the index of the interface we are being notified about

Protocols are expected to implement this method to be notified of the state change of an interface in a node.

Implements ns3::Ipv4RoutingProtocol.

Definition at line 753 of file ipv4-nix-vector-routing.cc.

References g_isCacheDirty.

void ns3::Ipv4NixVectorRouting::NotifyRemoveAddress	(	uint32_t	interface,
		Ipv4InterfaceAddress	address
	)

privatevirtual

Parameters

interface	the index of the interface we are being notified about
address	a new address being added to an interface

Protocols are expected to implement this method to be notified whenever a new address is removed from an interface. Typically used to remove the 'network route' of an interface. Can be invoked on an up or down interface.

Implements ns3::Ipv4RoutingProtocol.

Definition at line 768 of file ipv4-nix-vector-routing.cc.

References g_isCacheDirty.

void ns3::Ipv4NixVectorRouting::PrintRoutingTable ( Ptr< OutputStreamWrapper > stream ) const

privatevirtual

Print the Routing Table entries.

Parameters

stream the ostream the Routing table is printed to

Implements ns3::Ipv4RoutingProtocol.

Definition at line 699 of file ipv4-nix-vector-routing.cc.

References ns3::Time::As(), CheckCacheStateAndFlush(), ns3::Names::FindName(), ns3::OutputStreamWrapper::GetStream(), m_ipv4, m_ipv4RouteCache, m_nixCache, ns3::Now(), and ns3::Time::S.

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void ns3::Ipv4NixVectorRouting::ResetTotalNeighbors ( void )

private

bool ns3::Ipv4NixVectorRouting::RouteInput	(	Ptr< const Packet >	p,
		const Ipv4Header &	header,
		Ptr< const NetDevice >	idev,
		UnicastForwardCallback	ucb,
		MulticastForwardCallback	mcb,
		LocalDeliverCallback	lcb,
		ErrorCallback	ecb
	)

privatevirtual

Route an input packet (to be forwarded or locally delivered)

This lookup is used in the forwarding process. The packet is handed over to the Ipv4RoutingProtocol, and will get forwarded onward by one of the callbacks. The Linux equivalent is ip_route_input(). There are four valid outcomes, and a matching callbacks to handle each.

Parameters

p	received packet
header	input parameter used to form a search key for a route
idev	Pointer to ingress network device
ucb	Callback for the case in which the packet is to be forwarded as unicast
mcb	Callback for the case in which the packet is to be forwarded as multicast
lcb	Callback for the case in which the packet is to be locally delivered
ecb	Callback to call if there is an error in forwarding

Returns: true if the Ipv4RoutingProtocol takes responsibility for forwarding or delivering the packet, false otherwise

Implements ns3::Ipv4RoutingProtocol.

Definition at line 614 of file ipv4-nix-vector-routing.cc.

References ns3::NixVector::BitCount(), CheckCacheStateAndFlush(), ns3::NixVector::ExtractNeighborIndex(), FindNetDeviceForNixIndex(), FindTotalNeighbors(), ns3::Ipv4Header::GetDestination(), ns3::Node::GetDevice(), ns3::Node::GetId(), GetIpv4RouteInCache(), ns3::Ipv4InterfaceAddress::GetLocal(), ns3::Packet::GetNixVector(), ns3::Callback< R, T1, T2, T3, T4, T5, T6, T7, T8, T9 >::IsNull(), m_ipv4, m_ipv4RouteCache, m_node, m_totalNeighbors, NS_ASSERT, NS_LOG_FUNCTION_NOARGS, NS_LOG_LOGIC, ns3::Ipv4Route::SetDestination(), ns3::Ipv4Route::SetGateway(), ns3::Ipv4Route::SetOutputDevice(), and ns3::Ipv4Route::SetSource().

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Ptr< Ipv4Route > ns3::Ipv4NixVectorRouting::RouteOutput	(	Ptr< Packet >	p,
		const Ipv4Header &	header,
		Ptr< NetDevice >	oif,
		Socket::SocketErrno &	sockerr
	)

privatevirtual

Query routing cache for an existing route, for an outbound packet.

This lookup is used by transport protocols. It does not cause any packet to be forwarded, and is synchronous. Can be used for multicast or unicast. The Linux equivalent is ip_route_output()

The header input parameter may have an uninitialized value for the source address, but the destination address should always be properly set by the caller.

Parameters

p	packet to be routed. Note that this method may modify the packet. Callers may also pass in a null pointer.
header	input parameter (used to form key to search for the route)
oif	Output interface Netdevice. May be zero, or may be bound via socket options to a particular output interface.
sockerr	Output parameter; socket errno