Global routing protocol for IP version 4 stacks. More...

#include <ipv4-global-routing.h>

Inheritance diagram for ns3::Ipv4GlobalRouting:

Collaboration diagram for ns3::Ipv4GlobalRouting:

Public Member Functions
	Ipv4GlobalRouting ()
	Construct an empty Ipv4GlobalRouting routing protocol,. More...

virtual	~Ipv4GlobalRouting ()

void	AddASExternalRouteTo (Ipv4Address network, Ipv4Mask networkMask, Ipv4Address nextHop, uint32_t interface)
	Add an external route to the global routing table. More...

void	AddHostRouteTo (Ipv4Address dest, Ipv4Address nextHop, uint32_t interface)
	Add a host route to the global routing table. More...

void	AddHostRouteTo (Ipv4Address dest, uint32_t interface)
	Add a host route to the global routing table. More...

void	AddNetworkRouteTo (Ipv4Address network, Ipv4Mask networkMask, Ipv4Address nextHop, uint32_t interface)
	Add a network route to the global routing table. More...

void	AddNetworkRouteTo (Ipv4Address network, Ipv4Mask networkMask, uint32_t interface)
	Add a network route to the global routing table. More...

int64_t	AssignStreams (int64_t stream)
	Assign a fixed random variable stream number to the random variables used by this model. More...

uint32_t	GetNRoutes (void) const
	Get the number of individual unicast routes that have been added to the routing table. More...

Ipv4RoutingTableEntry *	GetRoute (uint32_t i) const
	Get a route from the global unicast routing table. More...

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	RemoveRoute (uint32_t i)
	Remove a route from the global unicast routing table. More...

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)

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

virtual	~Object ()

void	AggregateObject (Ptr< Object > other)

void	Dispose (void)
	Run the DoDispose methods of this object and all the objects aggregated to it. More...

AggregateIterator	GetAggregateIterator (void) const

virtual TypeId	GetInstanceTypeId (void) const

template<typename T >
Ptr< T >	GetObject (void) const

template<typename T >
Ptr< T >	GetObject (TypeId tid) const

void	Initialize (void)
	This method calls the virtual DoInitialize method on all the objects aggregated to this object. 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

bool	GetAttributeFailSafe (std::string name, AttributeValue &attribute) const

void	SetAttribute (std::string name, const AttributeValue &value)

bool	SetAttributeFailSafe (std::string name, const AttributeValue &value)

bool	TraceConnect (std::string name, std::string context, const CallbackBase &cb)

bool	TraceConnectWithoutContext (std::string name, const CallbackBase &cb)

bool	TraceDisconnect (std::string name, std::string context, const CallbackBase &cb)

bool	TraceDisconnectWithoutContext (std::string name, const CallbackBase &cb)

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

Protected Member Functions
void	DoDispose (void)
	This method is called by Object::Dispose or by the object's destructor, whichever comes first. More...

Protected Member Functions inherited from ns3::Object
	Object (const Object &o)

virtual void	DoInitialize (void)
	This method is called only once by Object::Initialize. More...

virtual void	NotifyNewAggregate (void)
	This method is invoked whenever two sets of objects are aggregated together. More...

Protected Member Functions inherited from ns3::ObjectBase
void	ConstructSelf (const AttributeConstructionList &attributes)

virtual void	NotifyConstructionCompleted (void)
	This method is invoked once all member attributes have been initialized. More...

Private Types
typedef std::list < Ipv4RoutingTableEntry * >	ASExternalRoutes
	container of Ipv4RoutingTableEntry (routes to external AS) More...

typedef std::list < Ipv4RoutingTableEntry * > ::const_iterator	ASExternalRoutesCI
	const iterator of container of Ipv4RoutingTableEntry (routes to external AS) More...

typedef std::list < Ipv4RoutingTableEntry * > ::iterator	ASExternalRoutesI
	iterator of container of Ipv4RoutingTableEntry (routes to external AS) More...

typedef std::list < Ipv4RoutingTableEntry * >	HostRoutes
	container of Ipv4RoutingTableEntry (routes to hosts) More...

typedef std::list < Ipv4RoutingTableEntry * > ::const_iterator	HostRoutesCI
	const iterator of container of Ipv4RoutingTableEntry (routes to hosts) More...

typedef std::list < Ipv4RoutingTableEntry * > ::iterator	HostRoutesI
	iterator of container of Ipv4RoutingTableEntry (routes to hosts) More...

typedef std::list < Ipv4RoutingTableEntry * >	NetworkRoutes
	container of Ipv4RoutingTableEntry (routes to networks) More...

typedef std::list < Ipv4RoutingTableEntry * > ::const_iterator	NetworkRoutesCI
	const iterator of container of Ipv4RoutingTableEntry (routes to networks) More...

typedef std::list < Ipv4RoutingTableEntry * > ::iterator	NetworkRoutesI
	iterator of container of Ipv4RoutingTableEntry (routes to networks) More...

Private Member Functions
Ptr< Ipv4Route >	LookupGlobal (Ipv4Address dest, Ptr< NetDevice > oif=0)

Private Attributes
ASExternalRoutes	m_ASexternalRoutes
	External routes imported. More...

HostRoutes	m_hostRoutes
	Routes to hosts. More...

Ptr< Ipv4 >	m_ipv4
	associated IPv4 instance More...

NetworkRoutes	m_networkRoutes
	Routes to networks. More...

Ptr< UniformRandomVariable >	m_rand
	A uniform random number generator for randomly routing packets among ECMP. More...

bool	m_randomEcmpRouting
	Set to true if packets are randomly routed among ECMP; set to false for using only one route consistently. More...

bool	m_respondToInterfaceEvents
	Set to true if this interface should respond to interface events by globallly recomputing routes. More...

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...

Detailed Description

Global routing protocol for IP version 4 stacks.

Doxygen introspection did not find any typical Config paths.

In ns-3 we have the concept of a pluggable routing protocol. Routing protocols are added to a list maintained by the Ipv4L3Protocol. Every stack gets one routing protocol for free – the Ipv4StaticRouting routing protocol is added in the constructor of the Ipv4L3Protocol (this is the piece of code that implements the functionality of the IP layer).

As an option to running a dynamic routing protocol, a GlobalRouteManager object has been created to allow users to build routes for all participating nodes. One can think of this object as a "routing oracle"; it has an omniscient view of the topology, and can construct shortest path routes between all pairs of nodes. These routes must be stored somewhere in the node, so therefore this class Ipv4GlobalRouting is used as one of the pluggable routing protocols. It is kept distinct from Ipv4StaticRouting because these routes may be dynamically cleared and rebuilt in the middle of the simulation, while manually entered routes into the Ipv4StaticRouting may need to be kept distinct.

This class deals with Ipv4 unicast routes only.

See also: Ipv4RoutingProtocol; GlobalRouteManager

Attributes

RandomEcmpRouting: Set to true if packets are randomly routed among ECMP; set to false for using only one route consistently
- Set with class: BooleanValue
- Underlying type: bool
- Initial value: false
- Flags: construct write read
RespondToInterfaceEvents: Set to true if you want to dynamically recompute the global routes upon Interface notification events (up/down, or add/remove address)
- Set with class: BooleanValue
- Underlying type: bool
- Initial value: false
- Flags: construct write read

No TraceSources are defined for this type.

Definition at line 69 of file ipv4-global-routing.h.

Member Typedef Documentation

typedef std::list<Ipv4RoutingTableEntry *> ns3::Ipv4GlobalRouting::ASExternalRoutes

private

container of Ipv4RoutingTableEntry (routes to external AS)

Definition at line 255 of file ipv4-global-routing.h.

typedef std::list<Ipv4RoutingTableEntry *>::const_iterator ns3::Ipv4GlobalRouting::ASExternalRoutesCI

private

const iterator of container of Ipv4RoutingTableEntry (routes to external AS)

Definition at line 257 of file ipv4-global-routing.h.

typedef std::list<Ipv4RoutingTableEntry *>::iterator ns3::Ipv4GlobalRouting::ASExternalRoutesI

private

iterator of container of Ipv4RoutingTableEntry (routes to external AS)

Definition at line 259 of file ipv4-global-routing.h.

typedef std::list<Ipv4RoutingTableEntry *> ns3::Ipv4GlobalRouting::HostRoutes

private

container of Ipv4RoutingTableEntry (routes to hosts)

Definition at line 241 of file ipv4-global-routing.h.

typedef std::list<Ipv4RoutingTableEntry *>::const_iterator ns3::Ipv4GlobalRouting::HostRoutesCI

private

const iterator of container of Ipv4RoutingTableEntry (routes to hosts)

Definition at line 243 of file ipv4-global-routing.h.

typedef std::list<Ipv4RoutingTableEntry *>::iterator ns3::Ipv4GlobalRouting::HostRoutesI

private

iterator of container of Ipv4RoutingTableEntry (routes to hosts)

Definition at line 245 of file ipv4-global-routing.h.

typedef std::list<Ipv4RoutingTableEntry *> ns3::Ipv4GlobalRouting::NetworkRoutes

private

container of Ipv4RoutingTableEntry (routes to networks)

Definition at line 248 of file ipv4-global-routing.h.

typedef std::list<Ipv4RoutingTableEntry *>::const_iterator ns3::Ipv4GlobalRouting::NetworkRoutesCI

private

const iterator of container of Ipv4RoutingTableEntry (routes to networks)

Definition at line 250 of file ipv4-global-routing.h.

typedef std::list<Ipv4RoutingTableEntry *>::iterator ns3::Ipv4GlobalRouting::NetworkRoutesI

private

iterator of container of Ipv4RoutingTableEntry (routes to networks)

Definition at line 252 of file ipv4-global-routing.h.

Constructor & Destructor Documentation

ns3::Ipv4GlobalRouting::Ipv4GlobalRouting ( )

Construct an empty Ipv4GlobalRouting routing protocol,.

The Ipv4GlobalRouting class supports host and network unicast routes. This method initializes the lists containing these routes to empty.

See also: Ipv4GlobalRouting

Definition at line 59 of file ipv4-global-routing.cc.

References m_rand, and NS_LOG_FUNCTION.

ns3::Ipv4GlobalRouting::~Ipv4GlobalRouting ( )

virtual

Definition at line 68 of file ipv4-global-routing.cc.

References NS_LOG_FUNCTION.

Member Function Documentation

void ns3::Ipv4GlobalRouting::AddASExternalRouteTo	(	Ipv4Address	network,
		Ipv4Mask	networkMask,
		Ipv4Address	nextHop,
		uint32_t	interface
	)

Add an external route to the global routing table.

Parameters

network	The Ipv4Address network for this route.
networkMask	The Ipv4Mask to extract the network.
nextHop	The next hop Ipv4Address
interface	The network interface index used to send packets to the destination.

Definition at line 123 of file ipv4-global-routing.cc.

References ns3::Ipv4RoutingTableEntry::CreateNetworkRouteTo(), m_ASexternalRoutes, and NS_LOG_FUNCTION.

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void ns3::Ipv4GlobalRouting::AddHostRouteTo	(	Ipv4Address	dest,
		Ipv4Address	nextHop,
		uint32_t	interface
	)

Add a host route to the global routing table.

Parameters

dest	The Ipv4Address destination for this route.
nextHop	The Ipv4Address of the next hop in the route.
interface	The network interface index used to send packets to the destination.

See also: Ipv4Address

Definition at line 74 of file ipv4-global-routing.cc.

References ns3::Ipv4RoutingTableEntry::CreateHostRouteTo(), m_hostRoutes, and NS_LOG_FUNCTION.

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void ns3::Ipv4GlobalRouting::AddHostRouteTo	(	Ipv4Address	dest,
		uint32_t	interface
	)

Add a host route to the global routing table.

Parameters

dest	The Ipv4Address destination for this route.
interface	The network interface index used to send packets to the destination.

See also: Ipv4Address

Definition at line 85 of file ipv4-global-routing.cc.

References ns3::Ipv4RoutingTableEntry::CreateHostRouteTo(), m_hostRoutes, and NS_LOG_FUNCTION.

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void ns3::Ipv4GlobalRouting::AddNetworkRouteTo	(	Ipv4Address	network,
		Ipv4Mask	networkMask,
		Ipv4Address	nextHop,
		uint32_t	interface
	)

Add a network route to the global routing table.

Parameters

network	The Ipv4Address network for this route.
networkMask	The Ipv4Mask to extract the network.
nextHop	The next hop in the route to the destination network.
interface	The network interface index used to send packets to the destination.

See also: Ipv4Address

Definition at line 95 of file ipv4-global-routing.cc.

References ns3::Ipv4RoutingTableEntry::CreateNetworkRouteTo(), m_networkRoutes, and NS_LOG_FUNCTION.

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void ns3::Ipv4GlobalRouting::AddNetworkRouteTo	(	Ipv4Address	network,
		Ipv4Mask	networkMask,
		uint32_t	interface
	)

Add a network route to the global routing table.

Parameters

network	The Ipv4Address network for this route.
networkMask	The Ipv4Mask to extract the network.
interface	The network interface index used to send packets to the destination.

See also: Ipv4Address

Definition at line 110 of file ipv4-global-routing.cc.

References ns3::Ipv4RoutingTableEntry::CreateNetworkRouteTo(), m_networkRoutes, and NS_LOG_FUNCTION.

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int64_t ns3::Ipv4GlobalRouting::AssignStreams ( int64_t stream )

Assign a fixed random variable stream number to the random variables used by this model.

Return the number of streams (possibly zero) that have been assigned.

Parameters

stream first stream index to use

Returns: the number of stream indices assigned by this model

Definition at line 365 of file ipv4-global-routing.cc.

References m_rand, NS_LOG_FUNCTION, and ns3::RandomVariableStream::SetStream().

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void ns3::Ipv4GlobalRouting::DoDispose ( void )

protectedvirtual

This method is called by Object::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 373 of file ipv4-global-routing.cc.

References ns3::Object::DoDispose(), m_ASexternalRoutes, m_hostRoutes, m_networkRoutes, and NS_LOG_FUNCTION.

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uint32_t ns3::Ipv4GlobalRouting::GetNRoutes ( void ) const

Get the number of individual unicast routes that have been added to the routing table.

Warning: The default route counts as one of the routes.

Returns: the number of routes

Definition at line 248 of file ipv4-global-routing.cc.

References m_ASexternalRoutes, m_hostRoutes, m_networkRoutes, and NS_LOG_FUNCTION.

Referenced by PrintRoutingTable().

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Ipv4RoutingTableEntry * ns3::Ipv4GlobalRouting::GetRoute ( uint32_t i ) const

Get a route from the global unicast routing table.

Externally, the unicast global routing table appears simply as a table with n entries. The one subtlety of note is that if a default route has been set it will appear as the zeroth entry in the table. This means that if you add only a default route, the table will have one entry that can be accessed either by explicitly calling GetDefaultRoute () or by calling GetRoute (0).

Similarly, if the default route has been set, calling RemoveRoute (0) will remove the default route.

Parameters

i	The index (into the routing table) of the route to retrieve. If the default route has been set, it will occupy index zero.

Returns: If route is set, a pointer to that Ipv4RoutingTableEntry is returned, otherwise a zero pointer is returned.

See also: Ipv4RoutingTableEntry; Ipv4GlobalRouting::RemoveRoute

Definition at line 259 of file ipv4-global-routing.cc.

References m_ASexternalRoutes, m_hostRoutes, m_networkRoutes, NS_ASSERT, and NS_LOG_FUNCTION.

Referenced by PrintRoutingTable().

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TypeId ns3::Ipv4GlobalRouting::GetTypeId ( void )

static

Get the type ID.

Returns: the object TypeId

Definition at line 41 of file ipv4-global-routing.cc.

References m_randomEcmpRouting, m_respondToInterfaceEvents, and ns3::TypeId::SetParent().

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Ptr< Ipv4Route > ns3::Ipv4GlobalRouting::LookupGlobal	(	Ipv4Address	dest,
		Ptr< NetDevice >	oif = `0`
	)

private

Todo:: handle multi-address case

Definition at line 139 of file ipv4-global-routing.cc.

References ns3::Ipv4RoutingTableEntry::GetDest(), ns3::Ipv4RoutingTableEntry::GetGateway(), ns3::UniformRandomVariable::GetInteger(), ns3::Ipv4RoutingTableEntry::GetInterface(), ns3::Ipv4Mask::IsMatch(), m_ASexternalRoutes, m_hostRoutes, m_ipv4, m_networkRoutes, m_rand, m_randomEcmpRouting, NS_ASSERT, NS_LOG_FUNCTION, NS_LOG_LOGIC, ns3::Ipv4Route::SetDestination(), ns3::Ipv4Route::SetGateway(), ns3::Ipv4Route::SetOutputDevice(), and ns3::Ipv4Route::SetSource().

Referenced by RouteInput(), and RouteOutput().

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void ns3::Ipv4GlobalRouting::NotifyAddAddress	(	uint32_t	interface,
		Ipv4InterfaceAddress	address
	)

virtual

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 579 of file ipv4-global-routing.cc.

References ns3::GlobalRouteManager::BuildGlobalRoutingDatabase(), ns3::GlobalRouteManager::DeleteGlobalRoutes(), ns3::GlobalRouteManager::InitializeRoutes(), m_respondToInterfaceEvents, ns3::Simulator::Now(), and NS_LOG_FUNCTION.

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void ns3::Ipv4GlobalRouting::NotifyInterfaceDown ( uint32_t interface )

virtual

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 567 of file ipv4-global-routing.cc.

References ns3::GlobalRouteManager::BuildGlobalRoutingDatabase(), ns3::GlobalRouteManager::DeleteGlobalRoutes(), ns3::GlobalRouteManager::InitializeRoutes(), m_respondToInterfaceEvents, ns3::Simulator::Now(), and NS_LOG_FUNCTION.

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void ns3::Ipv4GlobalRouting::NotifyInterfaceUp ( uint32_t interface )

virtual

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 555 of file ipv4-global-routing.cc.

References ns3::GlobalRouteManager::BuildGlobalRoutingDatabase(), ns3::GlobalRouteManager::DeleteGlobalRoutes(), ns3::GlobalRouteManager::InitializeRoutes(), m_respondToInterfaceEvents, ns3::Simulator::Now(), and NS_LOG_FUNCTION.

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void ns3::Ipv4GlobalRouting::NotifyRemoveAddress	(	uint32_t	interface,
		Ipv4InterfaceAddress	address
	)

virtual

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 591 of file ipv4-global-routing.cc.

References ns3::GlobalRouteManager::BuildGlobalRoutingDatabase(), ns3::GlobalRouteManager::DeleteGlobalRoutes(), ns3::GlobalRouteManager::InitializeRoutes(), m_respondToInterfaceEvents, ns3::Simulator::Now(), and NS_LOG_FUNCTION.

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void ns3::Ipv4GlobalRouting::PrintRoutingTable ( Ptr< OutputStreamWrapper > stream ) const

virtual

Print the Routing Table entries.

Parameters

stream the ostream the Routing table is printed to

Implements ns3::Ipv4RoutingProtocol.

Definition at line 400 of file ipv4-global-routing.cc.

References ns3::Names::FindName(), ns3::Ipv4RoutingTableEntry::GetDest(), ns3::Ipv4RoutingTableEntry::GetDestNetworkMask(), ns3::Ipv4RoutingTableEntry::GetGateway(), ns3::Ipv4RoutingTableEntry::GetInterface(), GetNRoutes(), GetRoute(), ns3::OutputStreamWrapper::GetStream(), ns3::Ipv4RoutingTableEntry::IsGateway(), ns3::Ipv4RoutingTableEntry::IsHost(), m_ipv4, and NS_LOG_FUNCTION.

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void ns3::Ipv4GlobalRouting::RemoveRoute ( uint32_t i )

Remove a route from the global unicast routing table.

Externally, the unicast global routing table appears simply as a table with n entries. The one subtlety of note is that if a default route has been set it will appear as the zeroth entry in the table. This means that if the default route has been set, calling RemoveRoute (0) will remove the default route.

Parameters

i	The index (into the routing table) of the route to remove. If the default route has been set, it will occupy index zero.

See also: Ipv4RoutingTableEntry; Ipv4GlobalRouting::GetRoute; Ipv4GlobalRouting::AddRoute

Definition at line 308 of file ipv4-global-routing.cc.

References m_ASexternalRoutes, m_hostRoutes, m_networkRoutes, NS_ASSERT, NS_LOG_FUNCTION, and NS_LOG_LOGIC.

bool ns3::Ipv4GlobalRouting::RouteInput	(	Ptr< const Packet >	p,
		const Ipv4Header &	header,
		Ptr< const NetDevice >	idev,
		UnicastForwardCallback	ucb,
		MulticastForwardCallback	mcb,
		LocalDeliverCallback	lcb,
		ErrorCallback	ecb
	)

virtual

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

Todo:: Local Deliver for broadcast

Todo:: Forward broadcast

Todo:: Configurable option to enable RFC 1222 Strong End System Model

Implements ns3::Ipv4RoutingProtocol.

Definition at line 476 of file ipv4-global-routing.cc.

References ns3::Socket::ERROR_NOROUTETOHOST, ns3::Ipv4InterfaceAddress::GetBroadcast(), ns3::Ipv4Header::GetDestination(), ns3::Ipv4InterfaceAddress::GetLocal(), ns3::Ipv4Header::GetSource(), ns3::Ipv4Address::IsBroadcast(), ns3::Ipv4Address::IsEqual(), ns3::Ipv4Address::IsMulticast(), LookupGlobal(), m_ipv4, NS_ASSERT, NS_LOG_FUNCTION, and NS_LOG_LOGIC.

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Ptr< Ipv4Route > ns3::Ipv4GlobalRouting::RouteOutput	(	Ptr< Packet >	p,
		const Ipv4Header &	header,
		Ptr< NetDevice >	oif,
		Socket::SocketErrno &	sockerr
	)

virtual

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