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ns3::EthernetHeader Class Reference

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. More...
 
 EthernetHeader ()
 Construct a null ethernet header By default, does not add or remove an ethernet preamble. More...
 
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 ()
 
- 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)
 
- Static Public Member Functions inherited from ns3::Header
static TypeId GetTypeId (void)
 
- Static Public Member Functions inherited from ns3::Chunk
static TypeId GetTypeId (void)
 
- Static Public Member Functions inherited from ns3::ObjectBase
static TypeId GetTypeId (void)
 Get the type ID. More...
 

Private Attributes

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

Static Private Attributes

static const int LENGTH_SIZE = 2
 size of the preamble_sfd header field More...
 
static const int MAC_ADDR_SIZE = 6
 size of the length_type header field More...
 
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)
 This method is invoked once all member attributes have been initialized. More...
 

Detailed Description

Packet header for Ethernet.

Doxygen introspection did not find any typical Config paths.

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.


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

Definition at line 50 of file ethernet-header.h.

Constructor & Destructor Documentation

ns3::EthernetHeader::EthernetHeader ( bool  hasPreamble)

Construct a null ethernet header.

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

Definition at line 36 of file ethernet-header.cc.

References NS_LOG_FUNCTION.

ns3::EthernetHeader::EthernetHeader ( )

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

Definition at line 43 of file ethernet-header.cc.

References NS_LOG_FUNCTION.

Member Function Documentation

uint32_t ns3::EthernetHeader::Deserialize ( Buffer::Iterator  start)
virtual
Parameters
startan 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 174 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 visualizer.core::start().

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Mac48Address ns3::EthernetHeader::GetDestination ( void  ) const
uint32_t ns3::EthernetHeader::GetHeaderSize ( void  ) const
Returns
The size of the header

Definition at line 110 of file ethernet-header.cc.

References GetSerializedSize(), and NS_LOG_FUNCTION.

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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 127 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 57 of file ethernet-header.cc.

References m_lengthType, and NS_LOG_FUNCTION.

Referenced by ns3::TapBridge::Filter(), ns3::FdNetDevice::ForwardUp(), 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 103 of file ethernet-header.cc.

References ns3::LENGTH, and NS_LOG_FUNCTION.

uint64_t ns3::EthernetHeader::GetPreambleSfd ( void  ) const
Returns
The value of the PreambleSfd field

Definition at line 70 of file ethernet-header.cc.

References m_preambleSfd, and NS_LOG_FUNCTION.

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 146 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(), 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 83 of file ethernet-header.cc.

References m_source, and NS_LOG_FUNCTION.

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

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TypeId ns3::EthernetHeader::GetTypeId ( void  )
static

Definition at line 118 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
osoutput 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 132 of file ethernet-header.cc.

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

void ns3::EthernetHeader::Serialize ( Buffer::Iterator  start) const
virtual
Parameters
startan 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 160 of file ethernet-header.cc.

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

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void ns3::EthernetHeader::SetDestination ( Mac48Address  destination)
Parameters
destinationThe destination address of this packet.

Definition at line 90 of file ethernet-header.cc.

References m_destination, and NS_LOG_FUNCTION.

Referenced by ns3::CsmaNetDevice::AddHeader(), ns3::TapBridge::ReceiveFromBridgedDevice(), ns3::FdNetDevice::SendFrom(), and ns3::EmuNetDevice::SendFrom().

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void ns3::EthernetHeader::SetLengthType ( uint16_t  size)
Parameters
sizeThe size of the payload in bytes

Definition at line 51 of file ethernet-header.cc.

References m_lengthType, and NS_LOG_FUNCTION.

Referenced by ns3::CsmaNetDevice::AddHeader(), ns3::TapBridge::ReceiveFromBridgedDevice(), ns3::FdNetDevice::SendFrom(), and ns3::EmuNetDevice::SendFrom().

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void ns3::EthernetHeader::SetPreambleSfd ( uint64_t  preambleSfd)
Parameters
preambleSfdThe value that the preambleSfd field should take

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

References m_preambleSfd, and NS_LOG_FUNCTION.

void ns3::EthernetHeader::SetSource ( Mac48Address  source)
Parameters
sourceThe source address of this packet

Definition at line 77 of file ethernet-header.cc.

References m_source, and NS_LOG_FUNCTION.

Referenced by ns3::CsmaNetDevice::AddHeader(), ns3::TapBridge::ReceiveFromBridgedDevice(), ns3::FdNetDevice::SendFrom(), and ns3::EmuNetDevice::SendFrom().

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Member Data Documentation

const int ns3::EthernetHeader::LENGTH_SIZE = 2
staticprivate

size of the preamble_sfd header field

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

Referenced by GetSerializedSize().

Mac48Address ns3::EthernetHeader::m_destination
private

Source address.

Definition at line 124 of file ethernet-header.h.

Referenced by Deserialize(), GetDestination(), Print(), Serialize(), and SetDestination().

bool ns3::EthernetHeader::m_enPreambleSfd
private

size of src/dest addr header fields

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

Definition at line 120 of file ethernet-header.h.

Referenced by Deserialize(), GetSerializedSize(), Print(), and Serialize().

uint16_t ns3::EthernetHeader::m_lengthType
private

Value of the Preamble/SFD fields.

Definition at line 122 of file ethernet-header.h.

Referenced by Deserialize(), GetLengthType(), Print(), Serialize(), and SetLengthType().

uint64_t ns3::EthernetHeader::m_preambleSfd
private

Definition at line 121 of file ethernet-header.h.

Referenced by GetPreambleSfd(), Print(), Serialize(), and SetPreambleSfd().

Mac48Address ns3::EthernetHeader::m_source
private

Length or type of the packet.

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

Referenced by Deserialize(), GetSource(), Print(), Serialize(), and SetSource().

const int ns3::EthernetHeader::MAC_ADDR_SIZE = 6
staticprivate

size of the length_type header field

Definition at line 115 of file ethernet-header.h.

Referenced by GetSerializedSize().

const int ns3::EthernetHeader::PREAMBLE_SIZE = 8
staticprivate

Definition at line 113 of file ethernet-header.h.

Referenced by GetSerializedSize().


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