Virtual network interface that loops back any data sent to it to be immediately received on the same interface. More...

#include "loopback-net-device.h"

Inheritance diagram for ns3::LoopbackNetDevice:

Collaboration diagram for ns3::LoopbackNetDevice:

Public Member Functions
	LoopbackNetDevice ()

void	AddLinkChangeCallback (Callback< void > callback) override

Address	GetAddress () const override

Address	GetBroadcast () const override

Ptr< Channel >	GetChannel () const override

uint32_t	GetIfIndex () const override

uint16_t	GetMtu () const override

Address	GetMulticast (Ipv4Address multicastGroup) const override
	Make and return a MAC multicast address using the provided multicast group.

Address	GetMulticast (Ipv6Address addr) const override
	Get the MAC multicast address corresponding to the IPv6 address provided.

Ptr< Node >	GetNode () const override

bool	IsBridge () const override
	Return true if the net device is acting as a bridge.

bool	IsBroadcast () const override

bool	IsLinkUp () const override

bool	IsMulticast () const override

bool	IsPointToPoint () const override
	Return true if the net device is on a point-to-point link.

bool	NeedsArp () const override

bool	Send (Ptr< Packet > packet, const Address &dest, uint16_t protocolNumber) override

bool	SendFrom (Ptr< Packet > packet, const Address &source, const Address &dest, uint16_t protocolNumber) override

void	SetAddress (Address address) override
	Set the address of this interface.

void	SetIfIndex (const uint32_t index) override

bool	SetMtu (const uint16_t mtu) override

void	SetNode (Ptr< Node > node) override

void	SetPromiscReceiveCallback (PromiscReceiveCallback cb) override

void	SetReceiveCallback (NetDevice::ReceiveCallback cb) override

bool	SupportsSendFrom () const override

Public Member Functions inherited from ns3::NetDevice
	~NetDevice () override

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::NetDevice
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.

Protected Member Functions
void	DoDispose () override
	Destructor implementation.

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.

Private Member Functions
void	Receive (Ptr< Packet > packet, uint16_t protocol, Mac48Address to, Mac48Address from)
	Receive a packet from tge Loopback NetDevice.

Private Attributes
Mac48Address	m_address
	NetDevice MAC address.

uint32_t	m_ifIndex
	interface index

uint16_t	m_mtu
	device MTU

Ptr< Node >	m_node
	the node this NetDevice is associated with

NetDevice::PromiscReceiveCallback	m_promiscCallback
	The callback used to notify higher layers that a packet has been received in promiscuous mode.

NetDevice::ReceiveCallback	m_rxCallback
	The callback used to notify higher layers that a packet has been received.

Additional Inherited Members
Public Types inherited from ns3::NetDevice
typedef void(*	LinkChangeTracedCallback) ()
	TracedCallback signature for link changed event.

enum	PacketType { PACKET_HOST = 1 , NS3_PACKET_HOST = PACKET_HOST , PACKET_BROADCAST , NS3_PACKET_BROADCAST = PACKET_BROADCAST , PACKET_MULTICAST , NS3_PACKET_MULTICAST = PACKET_MULTICAST , PACKET_OTHERHOST , NS3_PACKET_OTHERHOST = PACKET_OTHERHOST }
	Packet types are used as they are in Linux. More...

typedef Callback< bool, Ptr< NetDevice >, Ptr< const Packet >, uint16_t, const Address &, const Address &, PacketType >	PromiscReceiveCallback

typedef Callback< bool, Ptr< NetDevice >, Ptr< const Packet >, uint16_t, const Address & >	ReceiveCallback

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

Virtual network interface that loops back any data sent to it to be immediately received on the same interface.

This NetDevice is automatically added to any node as soon as the Internet stack is initialized.

Definition at line 32 of file loopback-net-device.h.

Constructor & Destructor Documentation

◆ LoopbackNetDevice()

ns3::LoopbackNetDevice::LoopbackNetDevice ( )

Definition at line 33 of file loopback-net-device.cc.

References NS_LOG_FUNCTION.

Member Function Documentation

◆ AddLinkChangeCallback()

void ns3::LoopbackNetDevice::AddLinkChangeCallback ( Callback< void > callback )

overridevirtual

Parameters

callback the callback to invoke

Add a callback invoked whenever the link status changes to UP. This callback is typically used by the IP/ARP layer to flush the ARP cache and by IPv6 stack to flush NDISC cache whenever the link goes up.

Implements ns3::NetDevice.

Definition at line 119 of file loopback-net-device.cc.

◆ DoDispose()

void ns3::LoopbackNetDevice::DoDispose ( )

overrideprotectedvirtual

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 overridden 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 231 of file loopback-net-device.cc.

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

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◆ GetAddress()

Address ns3::LoopbackNetDevice::GetAddress ( ) const

overridevirtual

Returns: the current Address of this interface.

Implements ns3::NetDevice.

Definition at line 94 of file loopback-net-device.cc.

References m_address.

◆ GetBroadcast()

Address ns3::LoopbackNetDevice::GetBroadcast ( ) const

overridevirtual

Returns: the broadcast address supported by this netdevice.

Calling this method is invalid if IsBroadcast returns not true.

Implements ns3::NetDevice.

Definition at line 130 of file loopback-net-device.cc.

Referenced by Send().

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◆ GetChannel()

Ptr< Channel > ns3::LoopbackNetDevice::GetChannel ( ) const

overridevirtual

Returns: the channel this NetDevice is connected to. The value returned can be zero if the NetDevice is not yet connected to any channel or if the underlying NetDevice has no concept of a channel. i.e., callers must check for zero and be ready to handle it.

Implements ns3::NetDevice.

Definition at line 82 of file loopback-net-device.cc.

◆ GetIfIndex()

uint32_t ns3::LoopbackNetDevice::GetIfIndex ( ) const

overridevirtual

Returns: index ifIndex of the device

Implements ns3::NetDevice.

Definition at line 76 of file loopback-net-device.cc.

References m_ifIndex.

◆ GetMtu()

uint16_t ns3::LoopbackNetDevice::GetMtu ( ) const

overridevirtual

Returns: the link-level MTU in bytes for this interface.

This value is typically used by the IP layer to perform IP fragmentation when needed.

Implements ns3::NetDevice.

Definition at line 107 of file loopback-net-device.cc.

References m_mtu.

◆ GetMulticast() [1/2]

Address ns3::LoopbackNetDevice::GetMulticast ( Ipv4Address multicastGroup ) const

overridevirtual

Make and return a MAC multicast address using the provided multicast group.

RFC 1112 says that an Ipv4 host group address is mapped to an Ethernet multicast address by placing the low-order 23-bits of the IP address into the low-order 23 bits of the Ethernet multicast address 01-00-5E-00-00-00 (hex). Similar RFCs exist for Ipv6 and Eui64 mappings. This method performs the multicast address creation function appropriate to the underlying MAC address of the device. This MAC address is encapsulated in an abstract Address to avoid dependencies on the exact MAC address format.

In the case of net devices that do not support multicast, clients are expected to test NetDevice::IsMulticast and avoid attempting to map multicast packets. Subclasses of NetDevice that do support multicasting are expected to override this method and provide an implementation appropriate to the particular device.

Parameters

multicastGroup The IP address for the multicast group destination of the packet.

Returns: The MAC multicast Address used to send packets to the provided multicast group.

Warning: Calling this method is invalid if IsMulticast returns not true.

See also: IsMulticast()

Implements ns3::NetDevice.

Definition at line 145 of file loopback-net-device.cc.

References ns3::Mac48Address::GetMulticast().

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◆ GetMulticast() [2/2]

Address ns3::LoopbackNetDevice::GetMulticast ( Ipv6Address addr ) const

overridevirtual

Get the MAC multicast address corresponding to the IPv6 address provided.

Parameters

addr	IPv6 address

Returns: the MAC multicast address

Warning: Calling this method is invalid if IsMulticast returns not true.

Implements ns3::NetDevice.

Definition at line 151 of file loopback-net-device.cc.

References ns3::Mac48Address::GetMulticast().

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◆ GetNode()

Ptr< Node > ns3::LoopbackNetDevice::GetNode ( ) const

overridevirtual

Returns: the node base class which contains this network interface.

When a subclass needs to get access to the underlying node base class to print the nodeid for example, it can invoke this method.

Implements ns3::NetDevice.

Definition at line 207 of file loopback-net-device.cc.

References m_node.

◆ GetTypeId()

TypeId ns3::LoopbackNetDevice::GetTypeId ( )

static

Get the type ID.

Returns: the object TypeId

Definition at line 24 of file loopback-net-device.cc.

References ns3::TypeId::SetParent().

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◆ IsBridge()

bool ns3::LoopbackNetDevice::IsBridge ( ) const

overridevirtual

Return true if the net device is acting as a bridge.

Returns: value of m_isBridge flag

Implements ns3::NetDevice.

Definition at line 163 of file loopback-net-device.cc.

◆ IsBroadcast()

bool ns3::LoopbackNetDevice::IsBroadcast ( ) const

overridevirtual

Returns: true if this interface supports a broadcast address, false otherwise.

Implements ns3::NetDevice.

Definition at line 124 of file loopback-net-device.cc.

◆ IsLinkUp()

bool ns3::LoopbackNetDevice::IsLinkUp ( ) const

overridevirtual

Returns: true if link is up; false otherwise

Implements ns3::NetDevice.

Definition at line 113 of file loopback-net-device.cc.

◆ IsMulticast()

bool ns3::LoopbackNetDevice::IsMulticast ( ) const

overridevirtual

Returns: value of m_isMulticast flag

Implements ns3::NetDevice.

Definition at line 137 of file loopback-net-device.cc.

◆ IsPointToPoint()

bool ns3::LoopbackNetDevice::IsPointToPoint ( ) const

overridevirtual

Return true if the net device is on a point-to-point link.

Returns: value of m_isPointToPoint flag

Implements ns3::NetDevice.

Definition at line 157 of file loopback-net-device.cc.

◆ NeedsArp()

bool ns3::LoopbackNetDevice::NeedsArp ( ) const

overridevirtual

Returns: true if ARP is needed, false otherwise.

Called by higher-layers to check if this NetDevice requires ARP to be used.

Implements ns3::NetDevice.

Definition at line 219 of file loopback-net-device.cc.

◆ Receive()

void ns3::LoopbackNetDevice::Receive	(	Ptr< Packet >	packet,
		uint16_t	protocol,
		Mac48Address	to,
		Mac48Address	from )

private

Receive a packet from tge Loopback NetDevice.

Parameters

packet	a reference to the received packet
protocol	the protocol
to	destination address
from	source address

Definition at line 43 of file loopback-net-device.cc.

References ns3::Mac48Address::IsBroadcast(), ns3::Mac48Address::IsGroup(), ns3::Callback< R, UArgs >::IsNull(), m_address, m_promiscCallback, m_rxCallback, NS_LOG_FUNCTION, ns3::NetDevice::PACKET_HOST, ns3::NetDevice::PACKET_MULTICAST, and ns3::NetDevice::PACKET_OTHERHOST.

Referenced by Send(), and SendFrom().

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◆ Send()

bool ns3::LoopbackNetDevice::Send	(	Ptr< Packet >	packet,
		const Address &	dest,
		uint16_t	protocolNumber )

overridevirtual

Parameters

packet	packet sent from above down to Network Device
dest	mac address of the destination (already resolved)
protocolNumber	identifies the type of payload contained in this packet. Used to call the right L3Protocol when the packet is received.

Called from higher layer to send packet into Network Device to the specified destination Address

Returns: whether the Send operation succeeded

Implements ns3::NetDevice.

Definition at line 169 of file loopback-net-device.cc.

References ns3::Mac48Address::ConvertFrom(), GetBroadcast(), ns3::Node::GetId(), m_address, m_node, NS_ASSERT_MSG, NS_LOG_FUNCTION, Receive(), ns3::Simulator::ScheduleWithContext(), and ns3::Seconds().

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◆ SendFrom()

bool ns3::LoopbackNetDevice::SendFrom	(	Ptr< Packet >	packet,
		const Address &	source,
		const Address &	dest,
		uint16_t	protocolNumber )

overridevirtual

Parameters

packet	packet sent from above down to Network Device
source	source mac address (so called "MAC spoofing")
dest	mac address of the destination (already resolved)
protocolNumber	identifies the type of payload contained in this packet. Used to call the right L3Protocol when the packet is received.

Called from higher layer to send packet into Network Device with the specified source and destination Addresses.

Returns: whether the Send operation succeeded

Implements ns3::NetDevice.

Definition at line 186 of file loopback-net-device.cc.

References ns3::Mac48Address::ConvertFrom(), ns3::Node::GetId(), ns3::Mac48Address::IsBroadcast(), m_address, m_node, NS_ASSERT_MSG, NS_LOG_FUNCTION, Receive(), ns3::Simulator::ScheduleWithContext(), and ns3::Seconds().

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◆ SetAddress()

void ns3::LoopbackNetDevice::SetAddress ( Address address )

overridevirtual

Set the address of this interface.

Parameters

address address to set

Implements ns3::NetDevice.

Definition at line 88 of file loopback-net-device.cc.

References ns3::Mac48Address::ConvertFrom(), and m_address.

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◆ SetIfIndex()

void ns3::LoopbackNetDevice::SetIfIndex ( const uint32_t index )

overridevirtual

Parameters

index ifIndex of the device

Implements ns3::NetDevice.

Definition at line 70 of file loopback-net-device.cc.

References m_ifIndex.

◆ SetMtu()

bool ns3::LoopbackNetDevice::SetMtu ( const uint16_t mtu )

overridevirtual

Parameters

mtu	MTU value, in bytes, to set for the device

Returns: whether the MTU value was within legal bounds

Override for default MTU defined on a per-type basis.

Implements ns3::NetDevice.

Definition at line 100 of file loopback-net-device.cc.

References m_mtu.

◆ SetNode()

void ns3::LoopbackNetDevice::SetNode ( Ptr< Node > node )

overridevirtual

Parameters

node	the node associated to this netdevice.

This method is called from ns3::Node::AddDevice.

Implements ns3::NetDevice.

Definition at line 213 of file loopback-net-device.cc.

References m_node.

◆ SetPromiscReceiveCallback()

void ns3::LoopbackNetDevice::SetPromiscReceiveCallback ( PromiscReceiveCallback cb )

overridevirtual

Parameters

cb	callback to invoke whenever a packet has been received in promiscuous mode and must be forwarded to the higher layers.

Enables netdevice promiscuous mode and sets the callback that will handle promiscuous mode packets. Note, promiscuous mode packets means all packets, including those packets that can be sensed by the netdevice but which are intended to be received by other hosts.

Implements ns3::NetDevice.

Definition at line 238 of file loopback-net-device.cc.

References m_promiscCallback.

◆ SetReceiveCallback()

void ns3::LoopbackNetDevice::SetReceiveCallback ( NetDevice::ReceiveCallback cb )

overridevirtual

Parameters

cb	callback to invoke whenever a packet has been received and must be forwarded to the higher layers.

Set the callback to be used to notify higher layers when a packet has been received.

Implements ns3::NetDevice.

Definition at line 225 of file loopback-net-device.cc.

References m_rxCallback.

◆ SupportsSendFrom()

bool ns3::LoopbackNetDevice::SupportsSendFrom ( ) const

overridevirtual

Returns: true if this interface supports a bridging mode, false otherwise.

Implements ns3::NetDevice.

Definition at line 244 of file loopback-net-device.cc.

Member Data Documentation

◆ m_address

Mac48Address ns3::LoopbackNetDevice::m_address

private

NetDevice MAC address.

Definition at line 101 of file loopback-net-device.h.

Referenced by GetAddress(), Receive(), Send(), SendFrom(), and SetAddress().

◆ m_ifIndex

uint32_t ns3::LoopbackNetDevice::m_ifIndex

private

interface index

Definition at line 100 of file loopback-net-device.h.

Referenced by GetIfIndex(), and SetIfIndex().

◆ m_mtu

uint16_t ns3::LoopbackNetDevice::m_mtu

private

device MTU

Definition at line 99 of file loopback-net-device.h.

Referenced by GetMtu(), and SetMtu().

◆ m_node

Ptr<Node> ns3::LoopbackNetDevice::m_node

private

the node this NetDevice is associated with

Definition at line 98 of file loopback-net-device.h.

Referenced by DoDispose(), GetNode(), Send(), SendFrom(), and SetNode().

◆ m_promiscCallback

NetDevice::PromiscReceiveCallback ns3::LoopbackNetDevice::m_promiscCallback

private

The callback used to notify higher layers that a packet has been received in promiscuous mode.

Definition at line 96 of file loopback-net-device.h.

Referenced by Receive(), and SetPromiscReceiveCallback().

◆ m_rxCallback

NetDevice::ReceiveCallback ns3::LoopbackNetDevice::m_rxCallback

private

The callback used to notify higher layers that a packet has been received.

Definition at line 90 of file loopback-net-device.h.

Referenced by Receive(), and SetReceiveCallback().

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

src/internet/model/loopback-net-device.h
src/internet/model/loopback-net-device.cc

Public Member Functions

Static Public Member Functions

Protected Member Functions

Private Member Functions

Private Attributes

Additional Inherited Members

Detailed Description

Constructor & Destructor Documentation

◆ LoopbackNetDevice()

Member Function Documentation

◆ AddLinkChangeCallback()

◆ DoDispose()

◆ GetAddress()

◆ GetBroadcast()

◆ GetChannel()

◆ GetIfIndex()

◆ GetMtu()

◆ GetMulticast() [1/2]

◆ GetMulticast() [2/2]

◆ GetNode()

◆ GetTypeId()

◆ IsBridge()

◆ IsBroadcast()

◆ IsLinkUp()

◆ IsMulticast()

◆ IsPointToPoint()

◆ NeedsArp()

◆ Receive()

◆ Send()

◆ SendFrom()

◆ SetAddress()

◆ SetIfIndex()

◆ SetMtu()

◆ SetNode()

◆ SetPromiscReceiveCallback()

◆ SetReceiveCallback()

◆ SupportsSendFrom()

Member Data Documentation

◆ m_address

◆ m_ifIndex

◆ m_mtu

◆ m_node

◆ m_promiscCallback

◆ m_rxCallback