ns3::OptionField Class Reference

Option field for an IPv6ExtensionHeader Enables adding options to an IPv6ExtensionHeader. More...

#include <ipv6-extension-header.h>

Inheritance diagram for ns3::OptionField:

Collaboration diagram for ns3::OptionField:

Public Member Functions
	OptionField (uint32_t optionsOffset)
	Constructor. More...
	~OptionField ()
	Destructor. More...
void	AddOption (Ipv6OptionHeader const &option)
	Serialize the option, prepending pad1 or padn option as necessary. More...
uint32_t	Deserialize (Buffer::Iterator start, uint32_t length)
	Deserialize the packet. More...
Buffer	GetOptionBuffer ()
	Get the buffer. More...
uint32_t	GetOptionsOffset ()
	Get the offset where the options begin, measured from the start of the extension header. More...
uint32_t	GetSerializedSize () const
	Get the serialized size of the packet. More...
void	Serialize (Buffer::Iterator start) const
	Serialize all added options. More...

Private Member Functions
uint32_t	CalculatePad (Ipv6OptionHeader::Alignment alignment) const
	Calculate padding. More...

Private Attributes
Buffer	m_optionData
	Data payload. More...
uint32_t	m_optionsOffset
	Offset. More...

Detailed Description

Option field for an IPv6ExtensionHeader Enables adding options to an IPv6ExtensionHeader.

Implementor's note: Make sure to add the result of OptionField::GetSerializedSize () to your IPv6ExtensionHeader::GetSerializedSize () return value. Call OptionField::Serialize and OptionField::Deserialize at the end of your corresponding IPv6ExtensionHeader methods.

Definition at line 141 of file ipv6-extension-header.h.

Constructor & Destructor Documentation

OptionField::OptionField

(

uint32_t

optionsOffset

)

Constructor.

Parameters

optionsOffset

option offset

Definition at line 124 of file ipv6-extension-header.cc.

OptionField::~OptionField

(

)

Destructor.

Definition at line 130 of file ipv6-extension-header.cc.

Member Function Documentation

void OptionField::AddOption

(

Ipv6OptionHeader const &

option

)

Serialize the option, prepending pad1 or padn option as necessary.

Parameters

option

the option header to serialize

Definition at line 165 of file ipv6-extension-header.cc.

References ns3::Buffer::AddAtEnd(), CalculatePad(), ns3::Buffer::End(), ns3::Ipv6OptionHeader::GetAlignment(), ns3::Ipv6OptionHeader::GetSerializedSize(), m_optionData, NS_LOG_FUNCTION_NOARGS, NS_LOG_LOGIC, ns3::Buffer::Iterator::Prev(), and ns3::Ipv6OptionHeader::Serialize().

Referenced by TestOptionWithoutAlignment::DoRun(), TestOptionWithAlignment::DoRun(), and TestFulfilledAlignment::DoRun().

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uint32_t OptionField::CalculatePad ( Ipv6OptionHeader::Alignment  alignment ) const

private

Calculate padding.

Parameters

alignment

alignment

Returns

the number of pad bytes

Definition at line 186 of file ipv6-extension-header.cc.

References ns3::Ipv6OptionHeader::Alignment::factor, ns3::Buffer::GetSize(), m_optionData, m_optionsOffset, and ns3::Ipv6OptionHeader::Alignment::offset.

Referenced by AddOption(), GetSerializedSize(), and Serialize().

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uint32_t OptionField::Deserialize	(	Buffer::Iterator	start,
		uint32_t	length
	)

Deserialize the packet.

Parameters

start	Buffer iterator
length	length

Returns

size of the packet

Definition at line 154 of file ipv6-extension-header.cc.

References ns3::Buffer::AddAtEnd(), ns3::Buffer::Begin(), m_optionData, ns3::Buffer::Iterator::Read(), and ns3::Buffer::Iterator::Write().

Referenced by ns3::Ipv6ExtensionHopByHopHeader::Deserialize(), and ns3::Ipv6ExtensionDestinationHeader::Deserialize().

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Buffer OptionField::GetOptionBuffer

(

)

Get the buffer.

Returns

buffer

Definition at line 196 of file ipv6-extension-header.cc.

References m_optionData.

uint32_t OptionField::GetOptionsOffset

(

)

Get the offset where the options begin, measured from the start of the extension header.

Returns

the offset from the start of the extension header

Definition at line 191 of file ipv6-extension-header.cc.

References m_optionsOffset.

Referenced by ns3::Ipv6ExtensionHopByHop::Process(), and ns3::Ipv6ExtensionDestination::Process().

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uint32_t OptionField::GetSerializedSize

(

void

)

const

Get the serialized size of the packet.

Returns

size

Definition at line 134 of file ipv6-extension-header.cc.

References CalculatePad(), ns3::Buffer::GetSize(), and m_optionData.

Referenced by ns3::Ipv6ExtensionHopByHopHeader::GetSerializedSize(), and ns3::Ipv6ExtensionDestinationHeader::GetSerializedSize().

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void OptionField::Serialize

(

Buffer::Iterator

start

)

const

Serialize all added options.

Parameters

start

Buffer iterator

Definition at line 139 of file ipv6-extension-header.cc.

References ns3::Buffer::Begin(), CalculatePad(), ns3::Buffer::End(), m_optionData, NS_LOG_LOGIC, ns3::Ipv6OptionPad1Header::Serialize(), ns3::Ipv6OptionPadnHeader::Serialize(), and ns3::Buffer::Iterator::Write().

Referenced by ns3::Ipv6ExtensionHopByHopHeader::Serialize(), and ns3::Ipv6ExtensionDestinationHeader::Serialize().

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Member Data Documentation

Buffer ns3::OptionField::m_optionData

private

Data payload.

Definition at line 206 of file ipv6-extension-header.h.

Referenced by AddOption(), CalculatePad(), Deserialize(), GetOptionBuffer(), GetSerializedSize(), and Serialize().

uint32_t ns3::OptionField::m_optionsOffset

private

Offset.

Definition at line 211 of file ipv6-extension-header.h.

Referenced by CalculatePad(), and GetOptionsOffset().

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

• src/internet/model/ipv6-extension-header.h
• src/internet/model/ipv6-extension-header.cc