Protocol header serialization and deserialization. More...

#include "sll-header.h"

Inheritance diagram for ns3::SllHeader:

Collaboration diagram for ns3::SllHeader:

Public Types
enum	PacketType { UNICAST_FROM_PEER_TO_ME = 0, BROADCAST_BY_PEER = 1, MULTICAST_BY_PEER = 2, INTERCEPTED_PACKET = 3, SENT_BY_US }
	Type of the packet. More...

Public Member Functions
	SllHeader ()

virtual	~SllHeader ()

virtual uint32_t	Deserialize (Buffer::Iterator start)

uint16_t	GetArpType () const

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

enum PacketType	GetPacketType () const

virtual uint32_t	GetSerializedSize (void) const

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

virtual void	Serialize (Buffer::Iterator start) const

void	SetArpType (uint16_t arphdType)

void	SetPacketType (PacketType type)

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
	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 erros. 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 (void)
	Get the type ID. More...

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

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

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

Protected Attributes
uint64_t	m_address
	Address. More...

uint16_t	m_addressLength
	Address length. More...

uint16_t	m_arphdType
	ARP protocol hardware identifier. More...

PacketType	m_packetType
	Packet type. More...

uint16_t	m_protocolType
	protocol type 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 (void)
	Notifier called once the ObjectBase is fully constructed. More...

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

Detailed Description

Protocol header serialization and deserialization.

Introspection did not find any typical Config paths.

Libpcap sometimes add an additional header to provide information that would be lost otherwise due to the link-layer/capture mechanism, for instance when capturing from "nlmon" device on linux

See also: http://www.tcpdump.org/linktypes/LINKTYPE_LINUX_SLL.html; https://wiki.wireshark.org/SLL

  +---------------------------+
  |         Packet type       |
  |         (2 Octets)        |
  +---------------------------+
  |        ARPHRD_ type       |
  |         (2 Octets)        |
  +---------------------------+
  | Link-layer address length |
  |         (2 Octets)        |
  +---------------------------+
  |    Link-layer address     |
  |         (8 Octets)        |
  +---------------------------+
  |        Protocol type      |
  |         (2 Octets)        |
  +---------------------------+
  |           Payload         |
  .                           .
  .                           .
  .                           .

No Attributes are defined for this type.
No TraceSources are defined for this type.
Size of this type is 32 bytes (on a 64-bit architecture).

Definition at line 64 of file sll-header.h.

Constructor & Destructor Documentation

ns3::SllHeader::SllHeader ( )

Definition at line 30 of file sll-header.cc.

References NS_LOG_FUNCTION.

ns3::SllHeader::~SllHeader ( )

virtual

Definition at line 40 of file sll-header.cc.

References NS_LOG_FUNCTION.

Member Function Documentation

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

virtual

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 113 of file sll-header.cc.

References GetSerializedSize(), m_address, m_addressLength, m_arphdType, m_packetType, m_protocolType, ns3::Buffer::Iterator::ReadNtohU16(), ns3::Buffer::Iterator::ReadNtohU64(), and visualizer.core::start().

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uint16_t ns3::SllHeader::GetArpType ( ) const

Returns: ARP header type field in network byte order The ARPHRD_ type field is in network byte order; it contains a Linux ARPHRD_ value for the link-layer device type.

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

References m_arphdType.

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

virtual

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 58 of file sll-header.cc.

References GetTypeId().

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SllHeader::PacketType ns3::SllHeader::GetPacketType ( void ) const

Returns: Packet type

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

References m_packetType.

uint32_t ns3::SllHeader::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 96 of file sll-header.cc.

Referenced by Deserialize().

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TypeId ns3::SllHeader::GetTypeId ( void )

static

Get the type ID.

Returns: the object TypeId

Definition at line 47 of file sll-header.cc.

References ns3::TypeId::SetParent().

Referenced by GetInstanceTypeId().

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

virtual

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 90 of file sll-header.cc.

References m_packetType, and m_protocolType.

void ns3::SllHeader::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 102 of file sll-header.cc.

References m_address, m_addressLength, m_arphdType, m_packetType, m_protocolType, visualizer.core::start(), ns3::Buffer::Iterator::WriteHtonU16(), and ns3::Buffer::Iterator::WriteHtonU64().

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