Packet header for Ethernet. More...

#include "ethernet-header.h"

Inheritance diagram for ns3::EthernetHeader:

Collaboration diagram for ns3::EthernetHeader:

Public Member Functions
	EthernetHeader ()
	Construct a null ethernet header By default, does not add or remove an ethernet preamble. More...

	EthernetHeader (bool hasPreamble)
	Construct a null ethernet header. More...

uint32_t	Deserialize (Buffer::Iterator start) override

Mac48Address	GetDestination () const

uint32_t	GetHeaderSize () const

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

uint16_t	GetLengthType () const

ethernet_header_t	GetPacketType () const

uint64_t	GetPreambleSfd () const

uint32_t	GetSerializedSize () const override

Mac48Address	GetSource () const

void	Print (std::ostream &os) const override

void	Serialize (Buffer::Iterator start) const override

void	SetDestination (Mac48Address destination)

void	SetLengthType (uint16_t size)

void	SetPreambleSfd (uint64_t preambleSfd)

void	SetSource (Mac48Address source)

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

virtual uint32_t	Deserialize (Buffer::Iterator start)=0
	Deserialize the object from a buffer iterator. More...

virtual uint32_t	Deserialize (Buffer::Iterator start, Buffer::Iterator end)
	Deserialize the object from a buffer iterator. More...

Public Member Functions inherited from ns3::Chunk
virtual uint32_t	Deserialize (Buffer::Iterator start, Buffer::Iterator end)
	Deserialize the object from a buffer iterator. 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 errors. 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 ()
	Get the type ID. More...

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

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

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

Private Attributes
Mac48Address	m_destination
	Destination address. More...

bool	m_enPreambleSfd
	If false, the preamble/sfd are not serialised/deserialised. More...

uint16_t	m_lengthType
	Length or type of the packet. More...

uint64_t	m_preambleSfd
	Value of the Preamble/SFD fields. More...

Mac48Address	m_source
	Source address. More...

Static Private Attributes
static const int	LENGTH_SIZE = 2
	size of the length_type header field More...

static const int	MAC_ADDR_SIZE = 6
	size of src/dest addr header fields More...

static const int	PREAMBLE_SIZE = 8
	size of the preamble_sfd header field More...

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

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

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

Detailed Description

Packet header for Ethernet.

This class can be used to add a header to an ethernet packet that will specify the source and destination addresses and the length of the packet. Eventually the class will be improved to also support VLAN tags in packet headers.

Definition at line 56 of file ethernet-header.h.

Constructor & Destructor Documentation

◆ EthernetHeader() [1/2]

ns3::EthernetHeader::EthernetHeader ( bool hasPreamble )

Construct a null ethernet header.

Parameters

hasPreamble if true, insert and remove an ethernet preamble from the packet, if false, does not insert and remove it.

Definition at line 38 of file ethernet-header.cc.

References NS_LOG_FUNCTION.

◆ EthernetHeader() [2/2]

ns3::EthernetHeader::EthernetHeader ( )

Construct a null ethernet header By default, does not add or remove an ethernet preamble.

Definition at line 45 of file ethernet-header.cc.

References NS_LOG_FUNCTION.

Member Function Documentation

◆ Deserialize()

uint32_t ns3::EthernetHeader::Deserialize ( Buffer::Iterator start )

overridevirtual

Parameters

start an iterator which points to where the header should read from.

Returns: the number of bytes read.

This method is used by Packet::RemoveHeader to re-create a header from the byte buffer of a packet. The data read is expected to match bit-for-bit the representation of this header in real networks.

Note that data is not actually removed from the buffer to which the iterator points. Both Packet::RemoveHeader() and Packet::PeekHeader() call Deserialize(), but only the RemoveHeader() has additional statements to remove the header bytes from the underlying buffer and associated metadata.

Implements ns3::Header.

Definition at line 182 of file ethernet-header.cc.

References GetSerializedSize(), m_destination, m_enPreambleSfd, m_lengthType, m_source, NS_LOG_FUNCTION, ns3::ReadFrom(), ns3::Buffer::Iterator::ReadNtohU16(), ns3::Buffer::Iterator::ReadU64(), and two-ray-to-three-gpp-ch-calibration::start.

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◆ GetDestination()

Mac48Address ns3::EthernetHeader::GetDestination ( ) const

Returns: The destination address of this packet

Definition at line 102 of file ethernet-header.cc.

References m_destination, and NS_LOG_FUNCTION.

Referenced by ns3::TapBridge::Filter(), ns3::FdNetDevice::ForwardUp(), ns3::CsmaNetDevice::Receive(), ns3::TapBridge::ReceiveFromBridgedDevice(), ns3::Ipv4L3ClickProtocol::SendDown(), ns3::PyViz::TraceNetDevPromiscRxCsma(), and ns3::PyViz::TraceNetDevTxCsma().

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◆ GetHeaderSize()

uint32_t ns3::EthernetHeader::GetHeaderSize ( ) const

Returns: The size of the header

Definition at line 116 of file ethernet-header.cc.

References GetSerializedSize(), and NS_LOG_FUNCTION.

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◆ GetInstanceTypeId()

TypeId ns3::EthernetHeader::GetInstanceTypeId ( ) const

overridevirtual

Get the most derived TypeId for this Object.

This method is typically implemented by ns3::Object::GetInstanceTypeId but some classes which derive from ns3::ObjectBase directly have to implement it themselves.

Returns: The TypeId associated to the most-derived type of this instance.

Implements ns3::ObjectBase.

Definition at line 133 of file ethernet-header.cc.

References GetTypeId().

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◆ GetLengthType()

uint16_t ns3::EthernetHeader::GetLengthType ( ) const

Returns: The size of the payload in bytes

Definition at line 60 of file ethernet-header.cc.

References m_lengthType, and NS_LOG_FUNCTION.

Referenced by ns3::TapBridge::Filter(), ns3::FdNetDevice::ForwardUp(), ns3::CsmaNetDevice::Receive(), ns3::TapBridge::ReceiveFromBridgedDevice(), and ns3::Ipv4L3ClickProtocol::SendDown().

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◆ GetPacketType()

ethernet_header_t ns3::EthernetHeader::GetPacketType ( ) const

Returns: The type of packet (only basic Ethernet is currently supported)

Definition at line 109 of file ethernet-header.cc.

References ns3::LENGTH, and NS_LOG_FUNCTION.

◆ GetPreambleSfd()

uint64_t ns3::EthernetHeader::GetPreambleSfd ( ) const

Returns: The value of the PreambleSfd field

Definition at line 74 of file ethernet-header.cc.

References m_preambleSfd, and NS_LOG_FUNCTION.

◆ GetSerializedSize()

uint32_t ns3::EthernetHeader::GetSerializedSize ( ) const

overridevirtual

Returns: the expected size of the header.

This method is used by Packet::AddHeader to store a header into the byte buffer of a packet. This method should return the number of bytes which are needed to store the full header data by Serialize.

Implements ns3::Header.

Definition at line 153 of file ethernet-header.cc.

References LENGTH_SIZE, m_enPreambleSfd, MAC_ADDR_SIZE, NS_LOG_FUNCTION, and PREAMBLE_SIZE.

Referenced by Deserialize(), ns3::TapBridge::Filter(), ns3::FdNetDevice::ForwardUp(), and GetHeaderSize().

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◆ GetSource()

Mac48Address ns3::EthernetHeader::GetSource ( ) const

Returns: The source address of this packet

Definition at line 88 of file ethernet-header.cc.

References m_source, and NS_LOG_FUNCTION.

Referenced by ns3::TapBridge::Filter(), ns3::FdNetDevice::ForwardUp(), ns3::CsmaNetDevice::Receive(), ns3::TapBridge::ReceiveFromBridgedDevice(), and ns3::PyViz::TraceNetDevRxCsma().

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◆ GetTypeId()

TypeId ns3::EthernetHeader::GetTypeId ( void )

static

Get the type ID.

Returns: the object TypeId

Definition at line 123 of file ethernet-header.cc.

References ns3::TypeId::SetParent().

Referenced by GetInstanceTypeId().

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◆ Print()

void ns3::EthernetHeader::Print ( std::ostream & os ) const

overridevirtual

Parameters

os output stream This method is used by Packet::Print to print the content of a header as ascii data to a c++ output stream. Although the header is free to format its output as it wishes, it is recommended to follow a few rules to integrate with the packet pretty printer: start with flags, small field values located between a pair of parens. Values should be separated by whitespace. Follow the parens with the important fields, separated by whitespace. i.e.: (field1 val1 field2 val2 field3 val3) field4 val4 field5 val5

Implements ns3::Header.

Definition at line 139 of file ethernet-header.cc.

References m_destination, m_enPreambleSfd, m_lengthType, m_preambleSfd, m_source, and NS_LOG_FUNCTION.

◆ Serialize()

void ns3::EthernetHeader::Serialize ( Buffer::Iterator start ) const

overridevirtual

Parameters

start an iterator which points to where the header should be written.

This method is used by Packet::AddHeader to store a header into the byte buffer of a packet. The data written is expected to match bit-for-bit the representation of this header in a real network.

Implements ns3::Header.

Definition at line 167 of file ethernet-header.cc.

References m_destination, m_enPreambleSfd, m_lengthType, m_preambleSfd, m_source, NS_LOG_FUNCTION, two-ray-to-three-gpp-ch-calibration::start, ns3::Buffer::Iterator::WriteHtonU16(), ns3::WriteTo(), and ns3::Buffer::Iterator::WriteU64().

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