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 ()
virtual void	AddLinkChangeCallback (Callback< void > callback)
virtual Address	GetAddress (void) const
virtual Address	GetBroadcast (void) const
virtual Ptr< Channel >	GetChannel (void) const
virtual uint32_t	GetIfIndex (void) const
virtual uint16_t	GetMtu (void) const
virtual Address	GetMulticast (Ipv4Address multicastGroup) const
	Make and return a MAC multicast address using the provided multicast group.
virtual Address	GetMulticast (Ipv6Address addr) const
	Get the MAC multicast address corresponding to the IPv6 address provided.
virtual Ptr< Node >	GetNode (void) const
virtual bool	IsBridge (void) const
	Return true if the net device is acting as a bridge.
virtual bool	IsBroadcast (void) const
virtual bool	IsLinkUp (void) const
virtual bool	IsMulticast (void) const
virtual bool	IsPointToPoint (void) const
	Return true if the net device is on a point-to-point link.
virtual bool	NeedsArp (void) const
virtual bool	Send (Ptr< Packet > packet, const Address &dest, uint16_t protocolNumber)
virtual bool	SendFrom (Ptr< Packet > packet, const Address &source, const Address &dest, uint16_t protocolNumber)
virtual void	SetAddress (Address address)
virtual void	SetIfIndex (const uint32_t index)
virtual bool	SetMtu (const uint16_t mtu)
virtual void	SetNode (Ptr< Node > node)
virtual void	SetPromiscReceiveCallback (PromiscReceiveCallback cb)
virtual void	SetReceiveCallback (NetDevice::ReceiveCallback cb)
virtual bool	SupportsSendFrom (void) const
Public Member Functions inherited from ns3::NetDevice
virtual	~NetDevice ()
Public Member Functions inherited from ns3::Object
	Object ()
virtual	~Object ()
void	AggregateObject (Ptr< Object > other)
void	Dispose (void)
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	Start (void)
Public Member Functions inherited from ns3::SimpleRefCount< Object, ObjectBase, ObjectDeleter >
	SimpleRefCount ()
	SimpleRefCount (const SimpleRefCount &o)
uint32_t	GetReferenceCount (void) const
SimpleRefCount &	operator= (const SimpleRefCount &o)
void	Ref (void) const
void	Unref (void) const
Public Member Functions inherited from ns3::ObjectBase
virtual	~ObjectBase ()
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)
	This method returns the TypeId associated to ns3::LoopbackNetDevice.

Protected Member Functions
virtual void	DoDispose (void)

Private Member Functions
void	Receive (Ptr< Packet > packet, uint16_t protocol, Mac48Address to, Mac48Address from)

Private Attributes
Mac48Address	m_address
uint32_t	m_ifIndex
uint16_t	m_mtu
Ptr< Node >	m_node
NetDevice::PromiscReceiveCallback	m_promiscCallback
NetDevice::ReceiveCallback	m_rxCallback

Additional Inherited Members
Public Types inherited from ns3::NetDevice
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 }
typedef Callback< bool, Ptr < NetDevice >, Ptr< const Packet >, uint16_t, const Address &, const Address &, enum PacketType >	PromiscReceiveCallback
typedef Callback< bool, Ptr < NetDevice >, Ptr< const Packet >, uint16_t, const Address & >	ReceiveCallback

Detailed Description

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

Definition at line 38 of file loopback-net-device.h.

Constructor & Destructor Documentation

ns3::LoopbackNetDevice::LoopbackNetDevice ( )

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

References NS_LOG_FUNCTION_NOARGS.

Member Function Documentation

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

virtual

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 131 of file loopback-net-device.cc.

void ns3::LoopbackNetDevice::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 224 of file loopback-net-device.cc.

References m_node.

Address ns3::LoopbackNetDevice::GetAddress ( void ) const

virtual

Returns: the current Address of this interface.

Implements ns3::NetDevice.

Definition at line 106 of file loopback-net-device.cc.

References m_address.

Address ns3::LoopbackNetDevice::GetBroadcast ( void ) const

virtual

Returns: the broadcast address supported by this netdevice.

Calling this method is invalid if IsBroadcast returns not true.

Implements ns3::NetDevice.

Definition at line 141 of file loopback-net-device.cc.

Referenced by Send().

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

virtual

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 94 of file loopback-net-device.cc.

uint32_t ns3::LoopbackNetDevice::GetIfIndex ( void ) const

virtual

Returns: index ifIndex of the device

Implements ns3::NetDevice.

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

References m_ifIndex.

uint16_t ns3::LoopbackNetDevice::GetMtu ( void ) const

virtual

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 119 of file loopback-net-device.cc.

References m_mtu.

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

virtual

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: Ipv4Address; Address; NetDevice::IsMulticast

Implements ns3::NetDevice.

Definition at line 156 of file loopback-net-device.cc.

Referenced by GetMulticast().

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

virtual

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 161 of file loopback-net-device.cc.

References GetMulticast().

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

virtual

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 200 of file loopback-net-device.cc.

References m_node.

TypeId ns3::LoopbackNetDevice::GetTypeId ( void )

static

This method returns the TypeId associated to ns3::LoopbackNetDevice.

This object is accessible through the following paths with Config::Set and Config::Connect:

/NodeList/[i]/DeviceList/[i]/$ns3::LoopbackNetDevice

No Attributes defined for this type.
No TraceSources defined for this type.

Reimplemented from ns3::NetDevice.

Definition at line 34 of file loopback-net-device.cc.

References ns3::TypeId::SetParent().

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bool ns3::LoopbackNetDevice::IsBridge ( void ) const

virtual

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

Returns: value of m_isBridge flag

Implements ns3::NetDevice.

Definition at line 173 of file loopback-net-device.cc.

bool ns3::LoopbackNetDevice::IsBroadcast ( void ) const

virtual

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

Implements ns3::NetDevice.

Definition at line 135 of file loopback-net-device.cc.

bool ns3::LoopbackNetDevice::IsLinkUp ( void ) const

virtual

Returns: true if link is up; false otherwise

Implements ns3::NetDevice.

Definition at line 125 of file loopback-net-device.cc.

bool ns3::LoopbackNetDevice::IsMulticast ( void ) const

virtual

Returns: value of m_isMulticast flag

Implements ns3::NetDevice.

Definition at line 148 of file loopback-net-device.cc.

bool ns3::LoopbackNetDevice::IsPointToPoint ( void ) const

virtual

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 167 of file loopback-net-device.cc.

bool ns3::LoopbackNetDevice::NeedsArp ( void ) const

virtual

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 212 of file loopback-net-device.cc.

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

private

Definition at line 53 of file loopback-net-device.cc.

References ns3::Mac48Address::IsBroadcast(), ns3::Mac48Address::IsGroup(), ns3::Callback< R, T1, T2, T3, T4, T5, T6, T7, T8, T9 >::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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bool ns3::LoopbackNetDevice::Send	(	Ptr< Packet >	packet,
		const Address &	dest,
		uint16_t	protocolNumber
	)

virtual

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

virtual

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

virtual

Set the address of this interface

Parameters

address address to set

Implements ns3::NetDevice.

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

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

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

virtual

Parameters

index ifIndex of the device

Implements ns3::NetDevice.

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

References m_ifIndex.

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

virtual

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 112 of file loopback-net-device.cc.

References m_mtu.

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

virtual

Parameters

node	the node associated to this netdevice.

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

Implements ns3::NetDevice.

Definition at line 206 of file loopback-net-device.cc.

References m_node.

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

virtual

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 232 of file loopback-net-device.cc.

References m_promiscCallback.

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

virtual

Parameters