Packet header for Ethernet. More...

#include <ethernet-header.h>

Inheritance diagram for ns3::EthernetHeader:

Collaboration diagram for ns3::EthernetHeader:

Public Member Functions
	EthernetHeader (bool hasPreamble)
	Construct a null ethernet header.
	EthernetHeader ()
	Construct a null ethernet header By default, does not add or remove an ethernet preamble.
virtual uint32_t	Deserialize (Buffer::Iterator start)
Mac48Address	GetDestination (void) const
uint32_t	GetHeaderSize () const
virtual TypeId	GetInstanceTypeId (void) const
uint16_t	GetLengthType (void) const
ethernet_header_t	GetPacketType (void) const
uint64_t	GetPreambleSfd () const
virtual uint32_t	GetSerializedSize (void) const
Mac48Address	GetSource (void) const
virtual void	Print (std::ostream &os) const
virtual void	Serialize (Buffer::Iterator start) const
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
virtual	~Header ()

Static Public Member Functions
static TypeId	GetTypeId (void)
	This method returns the TypeId associated to ns3::EthernetHeader.

Private Attributes
Mac48Address	m_destination
	Source address.
bool	m_enPreambleSfd
	size of src/dest addr header fields
uint16_t	m_lengthType
	Value of the Preamble/SFD fields.
uint64_t	m_preambleSfd
Mac48Address	m_source
	Length or type of the packet.

Static Private Attributes
static const int	LENGTH_SIZE = 2
	size of the preamble_sfd header field
static const int	MAC_ADDR_SIZE = 6
	size of the length_type header field
static const int	PREAMBLE_SIZE = 8

Additional Inherited Members
Protected Member Functions inherited from ns3::ObjectBase
void	ConstructSelf (const AttributeConstructionList &attributes)
virtual void	NotifyConstructionCompleted (void)

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 50 of file ethernet-header.h.

Constructor & Destructor Documentation

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 35 of file ethernet-header.cc.

ns3::EthernetHeader::EthernetHeader ( )

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

Definition at line 41 of file ethernet-header.cc.

Member Function Documentation

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

virtual

Parameters

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

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.

Implements ns3::Header.

Definition at line 158 of file ethernet-header.cc.

References GetSerializedSize(), m_destination, m_enPreambleSfd, m_lengthType, m_source, ns3::ReadFrom(), ns3::Buffer::Iterator::ReadNtohU16(), ns3::Buffer::Iterator::ReadU64(), and visualizer.core::start().

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Mac48Address ns3::EthernetHeader::GetDestination ( void ) const

Returns: The destination address of this packet

Definition at line 86 of file ethernet-header.cc.

References m_destination.

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

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uint32_t ns3::EthernetHeader::GetHeaderSize ( void ) const

Returns: The size of the header

Definition at line 98 of file ethernet-header.cc.

References GetSerializedSize().

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TypeId ns3::EthernetHeader::GetInstanceTypeId ( void ) const

virtual

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

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

Implements ns3::ObjectBase.

Definition at line 114 of file ethernet-header.cc.

References GetTypeId().

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uint16_t ns3::EthernetHeader::GetLengthType ( void ) const

Returns: The size of the payload in bytes

Definition at line 53 of file ethernet-header.cc.

References m_lengthType.

Referenced by ns3::TapBridge::Filter(), ns3::EmuNetDevice::ForwardUp(), ns3::CsmaNetDevice::Receive(), and ns3::TapBridge::ReceiveFromBridgedDevice().

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ethernet_header_t ns3::EthernetHeader::GetPacketType ( void ) const

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

Definition at line 92 of file ethernet-header.cc.

References ns3::LENGTH.

uint64_t ns3::EthernetHeader::GetPreambleSfd ( void ) const

Returns: The value of the PreambleSfd field

Definition at line 64 of file ethernet-header.cc.

References m_preambleSfd.

uint32_t ns3::EthernetHeader::GetSerializedSize ( void ) const

virtual

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 132 of file ethernet-header.cc.

References LENGTH_SIZE, m_enPreambleSfd, MAC_ADDR_SIZE, and PREAMBLE_SIZE.

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

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Mac48Address ns3::EthernetHeader::GetSource ( void ) const

Returns: The source address of this packet

Definition at line 75 of file ethernet-header.cc.

References m_source.

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

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TypeId ns3::EthernetHeader::GetTypeId ( void )

static

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

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

Reimplemented from ns3::Header.

Definition at line 105 of file ethernet-header.cc.

References ns3::TypeId::SetParent().

Referenced by GetInstanceTypeId().

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

virtual

Parameters

os output stream This method is used by Packet::Print to print the content of a trailer as ascii data to a c++ output stream. Although the trailer 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 119 of file ethernet-header.cc.

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

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

virtual

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 145 of file ethernet-header.cc.

References m_destination, m_enPreambleSfd, m_lengthType, m_preambleSfd, m_source, visualizer.core::start(), ns3::Buffer::Iterator::WriteHtonU16(), ns3::WriteTo(), and ns3::Buffer::Iterator::WriteU64().

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