ndn::Block Class Reference

Represents a TLV element of NDN packet format. More...

#include <block.hpp>

Inheritance diagram for ndn::Block:

Collaboration diagram for ndn::Block:

Classes
class	Error

Public Types
using	element_container = std::vector< Block >
using	element_iterator = element_container::iterator
using	element_const_iterator = element_container::const_iterator

Public Member Functions
	Block ()
	Create an empty Block. More...
	Block (const EncodingBuffer &buffer)
	Parse Block from an EncodingBuffer. More...
	Block (const ConstBufferPtr &buffer)
	Parse Block from a wire Buffer. More...
	Block (ConstBufferPtr buffer, Buffer::const_iterator begin, Buffer::const_iterator end, bool verifyLength=true)
	Parse Block within boundaries of a wire Buffer. More...
	Block (const Block &block, Buffer::const_iterator begin, Buffer::const_iterator end, bool verifyLength=true)
	Parse Block within boundaries of an existing Block, reusing underlying wire Buffer. More...
	Block (ConstBufferPtr buffer, uint32_t type, Buffer::const_iterator begin, Buffer::const_iterator end, Buffer::const_iterator valueBegin, Buffer::const_iterator valueEnd)
	Create a Block from a wire Buffer without parsing. More...
	Block (const uint8_t *buf, size_t bufSize)
	Parse Block from a raw buffer. More...
	Block (uint32_t type)
	Create an empty Block with specified TLV-TYPE. More...
	Block (uint32_t type, ConstBufferPtr value)
	Create a Block with specified TLV-TYPE and TLV-VALUE. More...
	Block (uint32_t type, const Block &value)
	Create a Block with specified TLV-TYPE and TLV-VALUE. More...
bool	empty () const
	Check if the Block is empty. More...
bool	hasWire () const
	Check if the Block has fully encoded wire. More...
void	reset ()
	Reset wire buffer of the element. More...
void	resetWire ()
	Reset wire buffer but keep TLV-TYPE and sub elements (if any) More...
Buffer::const_iterator	begin () const
	Get begin iterator of encoded wire. More...
Buffer::const_iterator	end () const
	Get end iterator of encoded wire. More...
const uint8_t *	wire () const
	Get pointer to encoded wire. More...
size_t	size () const
	Get size of encoded wire, including Type-Length-Value. More...
shared_ptr< const Buffer >	getBuffer () const
	Get underlying buffer. More...
uint32_t	type () const
	Get TLV-TYPE. More...
bool	hasValue () const
	Get begin iterator of TLV-VALUE. More...
Buffer::const_iterator	value_begin () const
	Get begin iterator of TLV-VALUE. More...
Buffer::const_iterator	value_end () const
	Get end iterator of TLV-VALUE. More...
const uint8_t *	value () const
	Get pointer to TLV-VALUE. More...
size_t	value_size () const
	Get size of TLV-VALUE aka TLV-LENGTH. More...
Block	blockFromValue () const
void	parse () const
	Parse TLV-VALUE into sub elements. More...
void	encode ()
	Encode sub elements into TLV-VALUE. More...
const Block &	get (uint32_t type) const
	Get the first sub element of specified TLV-TYPE. More...
element_const_iterator	find (uint32_t type) const
	Find the first sub element of specified TLV-TYPE. More...
void	remove (uint32_t type)
	Remove all sub elements of specified TLV-TYPE. More...
element_iterator	erase (element_const_iterator position)
	Erase a sub element. More...
element_iterator	erase (element_const_iterator first, element_const_iterator last)
	Erase a range of sub elements. More...
void	push_back (const Block &element)
	Append a sub element. More...
element_iterator	insert (element_const_iterator pos, const Block &element)
	Insert a sub element. More...
const element_container &	elements () const
	Get container of sub elements. More...
element_const_iterator	elements_begin () const
	Equivalent to elements().begin() More...
element_const_iterator	elements_end () const
	Equivalent to elements().end() More...
size_t	elements_size () const
	Equivalent to elements().size() More...
	operator boost::asio::const_buffer () const
	Implicit conversion to const_buffer. More...

Static Public Member Functions
static Block	fromStream (std::istream &is)
	Parse Block from an input stream. More...
static std::tuple< bool, Block >	fromBuffer (ConstBufferPtr buffer, size_t offset)
	Try to parse Block from a wire buffer. More...
static std::tuple< bool, Block >	fromBuffer (const uint8_t *buf, size_t bufSize)
	Try to parse Block from a raw buffer. More...

Protected Attributes
shared_ptr< const Buffer >	m_buffer
	underlying buffer storing TLV-VALUE and possibly TLV-TYPE and TLV-LENGTH fields More...
Buffer::const_iterator	m_begin
Buffer::const_iterator	m_end
Buffer::const_iterator	m_valueBegin
Buffer::const_iterator	m_valueEnd
uint32_t	m_type
	TLV-TYPE. More...
uint32_t	m_size
	total size including Type-Length-Value More...
element_container	m_elements
	sub elements More...

Detailed Description

Represents a TLV element of NDN packet format.

See also

https://named-data.net/doc/ndn-tlv/tlv.html

Definition at line 42 of file block.hpp.

Member Typedef Documentation

using ndn::Block::element_container = std::vector<Block>

Definition at line 45 of file block.hpp.

using ndn::Block::element_iterator = element_container::iterator

Definition at line 46 of file block.hpp.

using ndn::Block::element_const_iterator = element_container::const_iterator

Definition at line 47 of file block.hpp.

Constructor & Destructor Documentation

ndn::Block::Block

(

)

Create an empty Block.

Definition at line 49 of file block.cpp.

Referenced by blockFromValue(), fromBuffer(), ndn::name::Component::fromImplicitSha256Digest(), and fromStream().

ndn::Block::Block ( const EncodingBuffer &  buffer )

explicit

Parse Block from an EncodingBuffer.

Parameters

buffer

an EncodingBuffer containing one TLV element

Exceptions

tlv::Error

Type-Length parsing fails, or TLV-LENGTH does not match size of TLV-VALUE

Definition at line 55 of file block.cpp.

ndn::Block::Block ( const ConstBufferPtr &  buffer )

explicit

Parse Block from a wire Buffer.

Parameters

buffer

a Buffer containing one TLV element

Note

This constructor takes shared ownership of buffer.

Exceptions

tlv::Error

Type-Length parsing fails, or TLV-LENGTH does not match size of TLV-VALUE

Definition at line 60 of file block.cpp.

ndn::Block::Block	(	ConstBufferPtr	buffer,
		Buffer::const_iterator	begin,
		Buffer::const_iterator	end,
		bool	verifyLength = true
	)

Parse Block within boundaries of a wire Buffer.

Parameters

buffer	a Buffer containing an TLV element at [begin,end)
begin	begin position of the TLV element within buffer
end	end position of the TLV element within buffer
verifyLength	if true, check TLV-LENGTH equals size of TLV-VALUE

Exceptions

std::invalid_argument	buffer is empty, or [begin,end) range are not within buffer
tlv::Error	Type-Length parsing fails, or TLV-LENGTH does not match size of TLV-VALUE

Note

This overload automatically detects TLV-TYPE and position of TLV-VALUE.

Definition at line 65 of file block.cpp.

References m_buffer, m_type, m_valueBegin, m_valueEnd, ndn::tlv::readType(), and ndn::tlv::readVarNumber().

ndn::Block::Block	(	const Block &	block,
		Buffer::const_iterator	begin,
		Buffer::const_iterator	end,
		bool	verifyLength = true
	)

Parse Block within boundaries of an existing Block, reusing underlying wire Buffer.

Parameters

block	a Block whose buffer contains an TLV element at [begin,end)
begin	begin position of the TLV element within block
end	end position of the TLV element within block
verifyLength	if true, check TLV-LENGTH equals size of TLV-VALUE

Exceptions

std::invalid_argument	[begin,end) range are not within block
tlv::Error	Type-Length parsing fails, or TLV-LENGTH does not match size of TLV-VALUE

Definition at line 94 of file block.cpp.

ndn::Block::Block	(	ConstBufferPtr	buffer,
		uint32_t	type,
		Buffer::const_iterator	begin,
		Buffer::const_iterator	end,
		Buffer::const_iterator	valueBegin,
		Buffer::const_iterator	valueEnd
	)

Create a Block from a wire Buffer without parsing.

Parameters

buffer	a Buffer containing an TLV element at [begin,end)
type	TLV-TYPE
begin	begin position of the TLV element within buffer
end	end position of the TLV element within buffer
valueBegin	begin position of TLV-VALUE within buffer
valueEnd	end position of TLV-VALUE within buffer

Definition at line 100 of file block.cpp.

ndn::Block::Block	(	const uint8_t *	buf,
		size_t	bufSize
	)

Parse Block from a raw buffer.

Parameters

buf	pointer to the first octet of an TLV element
bufSize	size of the raw buffer; may be more than size of the TLV element

Exceptions

tlv::Error

Type-Length parsing fails, or size of TLV-VALUE exceeds bufSize

Note

This overload copies the TLV element into an internal wire buffer.

Definition at line 113 of file block.cpp.

References end(), m_begin, m_buffer, m_end, m_size, m_type, m_valueBegin, m_valueEnd, ndn::tlv::readType(), and ndn::tlv::readVarNumber().

ndn::Block::Block ( uint32_t  type )

explicit

Create an empty Block with specified TLV-TYPE.

Parameters

type

TLV-TYPE

Definition at line 134 of file block.cpp.

ndn::Block::Block	(	uint32_t	type,
		ConstBufferPtr	value
	)

Create a Block with specified TLV-TYPE and TLV-VALUE.

Parameters

type	TLV-TYPE
value	a Buffer containing the TLV-VALUE

Definition at line 140 of file block.cpp.

References m_size, m_type, ndn::tlv::sizeOfVarNumber(), and value_size().

ndn::Block::Block	(	uint32_t	type,
		const Block &	value
	)

Create a Block with specified TLV-TYPE and TLV-VALUE.

Parameters

type	TLV-TYPE
value	a Block to be nested as TLV-VALUE

Definition at line 151 of file block.cpp.

References m_size, m_type, ndn::tlv::sizeOfVarNumber(), and value_size().

Member Function Documentation

Block ndn::Block::fromStream ( std::istream &  is )

static

Parse Block from an input stream.

Exceptions

tlv::Error

TLV-LENGTH is zero or exceeds upper bound

Warning

If decoding fails, bytes are still consumed from the input stream.

Definition at line 163 of file block.cpp.

References begin(), Block(), end(), ndn::tlv::readType(), ndn::tlv::readVarNumber(), ndn::tlv::sizeOfVarNumber(), and type().

Referenced by ns3::ndn::BlockHeader::Deserialize().

std::tuple< bool, Block > ndn::Block::fromBuffer ( ConstBufferPtr  buffer, size_t  offset  )

static

Try to parse Block from a wire buffer.

Parameters

buffer	a Buffer containing an TLV element at offset offset
offset	begin position of the TLV element within buffer

Note

This function does not throw exceptions upon decoding failure.

Returns

true and the Block if parsing succeeds; otherwise false

Definition at line 195 of file block.cpp.

References begin(), Block(), ndn::tlv::readType(), ndn::tlv::readVarNumber(), and type().

Referenced by nfd::face::StreamTransport< Protocol >::handleReceive(), ndn::nfd::parseDatasetVector(), ndn::StreamTransportImpl< BaseTransport, Protocol >::processAllReceived(), nfd::face::DatagramTransport< Protocol, Addressing >::receiveDatagram(), nfd::face::WebSocketTransport::receiveMessage(), and nfd::face::EthernetTransport::receivePayload().

std::tuple< bool, Block > ndn::Block::fromBuffer ( const uint8_t *  buf, size_t  bufSize  )

static

Try to parse Block from a raw buffer.

Parameters

buf	pointer to the first octet of an TLV element
bufSize	size of the raw buffer; may be more than size of the TLV element

Note

This function does not throw exceptions upon decoding failure.

This overload copies the TLV element into an internal wire buffer.

Returns

true and the Block if parsing succeeds; otherwise false

Definition at line 220 of file block.cpp.

References Block(), end(), ndn::tlv::readType(), ndn::tlv::readVarNumber(), and type().

bool ndn::Block::empty ( ) const

inline

Check if the Block is empty.

A Block is "empty" only if it is default-constructed. A Block with zero-length TLV-VALUE is not considered empty.

Definition at line 173 of file block.hpp.

Referenced by size().

bool ndn::Block::hasWire

(

)

const

Check if the Block has fully encoded wire.

A Block has fully encoded wire if the underlying buffer exists and contains full Type-Length-Value instead of just TLV-VALUE field.

Definition at line 250 of file block.cpp.

References m_begin, m_buffer, and m_end.

Referenced by ndn::encoding::Encoder::appendBlock(), begin(), ndn::name::Component::compare(), encode(), end(), ndn::Data::getContent(), ndn::Data::getFullName(), ndn::encoding::Encoder::prependBlock(), ndn::encoding::Estimator::prependBlock(), wire(), ndn::security::ValidityPeriod::wireDecode(), ndn::security::v2::AdditionalDescription::wireDecode(), ndn::nfd::FaceEventNotification::wireEncode(), ndn::nfd::FaceStatus::wireEncode(), ndn::nfd::ChannelStatus::wireEncode(), ndn::nfd::StrategyChoice::wireEncode(), ndn::nfd::FaceQueryFilter::wireEncode(), ndn::nfd::ForwarderStatus::wireEncode(), ndn::mgmt::ControlResponse::wireEncode(), ndn::Selectors::wireEncode(), ndn::lp::NackHeader::wireEncode(), ndn::nfd::NextHopRecord::wireEncode(), ndn::SignatureInfo::wireEncode(), ndn::lp::CachePolicy::wireEncode(), ndn::Interest::wireEncode(), ndn::MetaInfo::wireEncode(), ndn::KeyLocator::wireEncode(), ndn::nfd::ControlParameters::wireEncode(), ndn::Data::wireEncode(), ndn::security::ValidityPeriod::wireEncode(), ndn::security::v2::AdditionalDescription::wireEncode(), ndn::nfd::Route::wireEncode(), ndn::Name::wireEncode(), ndn::nfd::FibEntry::wireEncode(), ndn::name::Component::wireEncode(), and ndn::nfd::RibEntry::wireEncode().

void ndn::Block::reset

(

)

Reset wire buffer of the element.

Postcondition

empty() == true

Definition at line 256 of file block.cpp.

References m_elements, m_type, and resetWire().

Referenced by ndn::MetaInfo::addAppMetaInfo(), ndn::nfd::FibEntry::addNextHopRecord(), ndn::nfd::RibEntry::addRoute(), ndn::SignatureInfo::appendTypeSpecificTlv(), ndn::KeyLocator::clear(), ndn::nfd::FibEntry::clearNextHopRecords(), ndn::nfd::RibEntry::clearRoutes(), ndn::MetaInfo::removeAppMetaInfo(), ndn::Data::resetWire(), ndn::MetaInfo::setAppMetaInfo(), ndn::mgmt::ControlResponse::setBody(), ndn::Selectors::setChildSelector(), ndn::mgmt::ControlResponse::setCode(), ndn::nfd::NextHopRecord::setCost(), ndn::nfd::Route::setCost(), ndn::nfd::ForwarderStatus::setCurrentTimestamp(), ndn::Selectors::setExclude(), ndn::nfd::FaceStatus::setExpirationPeriod(), ndn::nfd::Route::setExpirationPeriod(), ndn::nfd::FaceTraits< FaceEventNotification >::setFaceId(), ndn::nfd::NextHopRecord::setFaceId(), ndn::nfd::Route::setFaceId(), ndn::nfd::FaceQueryFilter::setFaceId(), ndn::nfd::FaceTraits< FaceEventNotification >::setFacePersistency(), ndn::nfd::FaceQueryFilter::setFacePersistency(), ndn::nfd::FaceTraits< FaceEventNotification >::setFaceScope(), ndn::nfd::FaceQueryFilter::setFaceScope(), ndn::MetaInfo::setFinalBlockId(), ndn::nfd::FaceTraits< FaceEventNotification >::setFlagBit(), ndn::nfd::Route::setFlags(), ndn::nfd::FaceTraits< FaceEventNotification >::setFlags(), ndn::Interest::setForwardingHint(), ndn::MetaInfo::setFreshnessPeriod(), ndn::Interest::setInterestLifetime(), ndn::SignatureInfo::setKeyLocator(), ndn::nfd::FaceEventNotification::setKind(), ndn::nfd::FaceTraits< FaceEventNotification >::setLinkType(), ndn::nfd::FaceQueryFilter::setLinkType(), ndn::nfd::ChannelStatus::setLocalUri(), ndn::nfd::FaceTraits< FaceEventNotification >::setLocalUri(), ndn::nfd::FaceQueryFilter::setLocalUri(), ndn::Selectors::setMaxSuffixComponents(), ndn::Selectors::setMinSuffixComponents(), ndn::Selectors::setMustBeFresh(), ndn::nfd::StrategyChoice::setName(), ndn::nfd::RibEntry::setName(), ndn::nfd::ForwarderStatus::setNCsEntries(), ndn::nfd::ForwarderStatus::setNfdVersion(), ndn::nfd::ForwarderStatus::setNFibEntries(), ndn::nfd::FaceStatus::setNInBytes(), ndn::nfd::FaceStatus::setNInData(), ndn::nfd::ForwarderStatus::setNInData(), ndn::nfd::FaceStatus::setNInInterests(), ndn::nfd::ForwarderStatus::setNInInterests(), ndn::nfd::FaceStatus::setNInNacks(), ndn::nfd::ForwarderStatus::setNInNacks(), ndn::nfd::ForwarderStatus::setNMeasurementsEntries(), ndn::nfd::ForwarderStatus::setNNameTreeEntries(), ndn::Interest::setNonce(), ndn::nfd::FaceStatus::setNOutBytes(), ndn::nfd::FaceStatus::setNOutData(), ndn::nfd::ForwarderStatus::setNOutData(), ndn::nfd::FaceStatus::setNOutInterests(), ndn::nfd::ForwarderStatus::setNOutInterests(), ndn::nfd::FaceStatus::setNOutNacks(), ndn::nfd::ForwarderStatus::setNOutNacks(), ndn::nfd::ForwarderStatus::setNPitEntries(), ndn::nfd::Route::setOrigin(), ndn::security::ValidityPeriod::setPeriod(), ndn::lp::CachePolicy::setPolicy(), ndn::nfd::FibEntry::setPrefix(), ndn::Selectors::setPublisherPublicKeyLocator(), ndn::lp::NackHeader::setReason(), ndn::nfd::FaceTraits< FaceEventNotification >::setRemoteUri(), ndn::nfd::FaceQueryFilter::setRemoteUri(), ndn::SignatureInfo::setSignatureType(), ndn::nfd::ForwarderStatus::setStartTimestamp(), ndn::nfd::StrategyChoice::setStrategy(), ndn::mgmt::ControlResponse::setText(), ndn::MetaInfo::setType(), ndn::nfd::FaceQueryFilter::setUriScheme(), ndn::nfd::FaceStatus::unsetExpirationPeriod(), ndn::nfd::Route::unsetExpirationPeriod(), ndn::nfd::FaceQueryFilter::unsetFaceId(), ndn::nfd::FaceQueryFilter::unsetFacePersistency(), ndn::nfd::FaceQueryFilter::unsetFaceScope(), ndn::SignatureInfo::unsetKeyLocator(), ndn::nfd::FaceQueryFilter::unsetLinkType(), and ndn::SignatureInfo::unsetValidityPeriod().

void ndn::Block::resetWire

(

)

Reset wire buffer but keep TLV-TYPE and sub elements (if any)

Postcondition

hasWire() == false

hasValue() == false

Definition at line 265 of file block.cpp.

References m_begin, m_buffer, m_end, m_valueBegin, and m_valueEnd.

Referenced by ndn::Name::deepCopy(), erase(), insert(), push_back(), remove(), and reset().

Buffer::const_iterator ndn::Block::begin

(

)

const

Get begin iterator of encoded wire.

Precondition

hasWire() == true

Definition at line 272 of file block.cpp.

References hasWire(), and m_begin.

Referenced by fromBuffer(), fromStream(), parse(), and ndn::lp::Packet::wireDecode().

Buffer::const_iterator ndn::Block::end

(

)

const

Get end iterator of encoded wire.

Precondition

hasWire() == true

Definition at line 281 of file block.cpp.

References hasWire(), and m_end.

Referenced by Block(), ndn::RegexTopMatcher::expand(), fromBuffer(), fromStream(), parse(), and ndn::lp::Packet::wireDecode().

const uint8_t * ndn::Block::wire

(

)

const

Get pointer to encoded wire.

Precondition

hasWire() == true

Definition at line 290 of file block.cpp.

References hasWire(), and m_begin.

Referenced by nfd::DeadNonceList::add(), ndn::mgmt::StatusDatasetContext::append(), ndn::encoding::Encoder::appendBlock(), ndn::util::Sqlite3Statement::bind(), ndn::name::Component::compare(), nfd::name_tree::computeHash(), nfd::name_tree::computeHashes(), ndn::name::Component::Error::Error(), ndn::Data::getFullName(), operator boost::asio::const_buffer(), ndn::util::Sha256::operator<<(), ndn::encoding::Encoder::prependBlock(), ndn::io::saveBlock(), ndn::util::DummyClientFace::Transport::send(), nfd::face::InternalClientTransport::send(), and ndn::name::Component::wireDecode().

size_t ndn::Block::size

(

)

const

Get size of encoded wire, including Type-Length-Value.

Precondition

empty() == false

Definition at line 299 of file block.cpp.

References empty(), and m_size.

Referenced by nfd::DeadNonceList::add(), ndn::mgmt::StatusDatasetContext::append(), ndn::encoding::Encoder::appendBlock(), ndn::util::Sqlite3Statement::bind(), ndn::WireEncodable< X >::BOOST_CONCEPT_USAGE(), ndn::name::Component::compare(), nfd::name_tree::computeHash(), nfd::name_tree::computeHashes(), nfd::face::EthernetTransport::doClose(), nfd::face::LpFragmenter::fragmentPacket(), ndn::name::Component::fromEscapedString(), ndn::Data::getFullName(), ndn::name::Component::getSuccessor(), nfd::face::StreamTransport< Protocol >::handleReceive(), operator boost::asio::const_buffer(), ndn::util::Sha256::operator<<(), ndn::security::parse(), ndn::nfd::parseDatasetVector(), nfd::face::LpReliability::piggyback(), ndn::encoding::Encoder::prependBlock(), ndn::encoding::Estimator::prependBlock(), ndn::StreamTransportImpl< BaseTransport, Protocol >::processAllReceived(), nfd::face::DatagramTransport< Protocol, Addressing >::receiveDatagram(), ndn::io::saveBlock(), ndn::util::DummyClientFace::Transport::send(), nfd::face::InternalClientTransport::send(), and ndn::Data::wireEncode().

shared_ptr<const Buffer> ndn::Block::getBuffer ( ) const

inline

Get underlying buffer.

Definition at line 226 of file block.hpp.

uint32_t ndn::Block::type ( ) const

inline

Get TLV-TYPE.

Definition at line 235 of file block.hpp.

Referenced by ndn::MetaInfo::addAppMetaInfo(), ndn::Name::append(), ndn::encoding::Encoder::appendBlock(), ndn::name::Component::compare(), ndn::lp::DecodeHelper< TlvType, std::pair< Buffer::const_iterator, Buffer::const_iterator > >::decode(), ndn::lp::FieldDecl< LOCATION, VALUE, TYPE, REPEATABLE >::decode(), ndn::name::Component::equals(), find(), nfd::face::LpFragmenter::fragmentPacket(), fromBuffer(), fromStream(), ndn::name::Component::getSuccessor(), ndn::name::Component::isGeneric(), ndn::name::Component::isImplicitSha256Digest(), ndn::operator==(), parse(), nfd::face::LpReliability::piggyback(), ndn::encoding::Encoder::prependBlock(), ndn::encoding::Estimator::prependBlock(), ndn::encoding::readNonNegativeIntegerAs(), remove(), ndn::Data::setContent(), ndn::KeyLocator::setKeyDigest(), nfd::face::GenericLinkService::setOptions(), ndn::Signature::setValue(), ndn::name::Component::toUri(), ndn::nfd::FaceEventNotification::wireDecode(), ndn::nfd::FaceStatus::wireDecode(), ndn::lp::Packet::wireDecode(), ndn::nfd::ChannelStatus::wireDecode(), ndn::nfd::StrategyChoice::wireDecode(), ndn::nfd::FaceQueryFilter::wireDecode(), ndn::mgmt::ControlResponse::wireDecode(), ndn::nfd::ForwarderStatus::wireDecode(), ndn::lp::NackHeader::wireDecode(), ndn::Selectors::wireDecode(), ndn::nfd::NextHopRecord::wireDecode(), ndn::Exclude::wireDecode(), ndn::DelegationList::wireDecode(), ndn::SignatureInfo::wireDecode(), ndn::lp::CachePolicy::wireDecode(), ndn::MetaInfo::wireDecode(), ndn::Interest::wireDecode(), ndn::security::SafeBag::wireDecode(), ndn::KeyLocator::wireDecode(), ndn::nfd::ControlParameters::wireDecode(), ndn::security::ValidityPeriod::wireDecode(), ndn::security::v2::AdditionalDescription::wireDecode(), ndn::nfd::Route::wireDecode(), ndn::Name::wireDecode(), ndn::nfd::FibEntry::wireDecode(), ndn::nfd::RibEntry::wireDecode(), and ndn::name::Component::wireEncode().

bool ndn::Block::hasValue ( ) const

inline

Get begin iterator of TLV-VALUE.

This property reflects whether the underlying buffer contains TLV-VALUE. If this is false, TLV-VALUE has zero-length. If this is true, TLV-VALUE may be zero-length.

Definition at line 246 of file block.hpp.

Referenced by blockFromValue(), encode(), value(), and value_size().

Buffer::const_iterator ndn::Block::value_begin ( ) const

inline

Get begin iterator of TLV-VALUE.

Precondition

hasValue() == true

Definition at line 255 of file block.hpp.

Referenced by ndn::security::v2::KeyChain::addCertificate(), ndn::lp::DecodeHelper< TlvType, std::pair< Buffer::const_iterator, Buffer::const_iterator > >::decode(), ndn::name::Component::equals(), parse(), ndn::encoding::readNonNegativeInteger(), and ndn::name::Component::toNumberWithMarker().

Buffer::const_iterator ndn::Block::value_end ( ) const

inline

Get end iterator of TLV-VALUE.

Precondition

hasValue() == true

Definition at line 264 of file block.hpp.

References ndn::security::parse().

Referenced by ndn::security::v2::KeyChain::addCertificate(), ndn::lp::DecodeHelper< TlvType, std::pair< Buffer::const_iterator, Buffer::const_iterator > >::decode(), ndn::name::Component::equals(), parse(), ndn::encoding::readNonNegativeInteger(), and ndn::name::Component::toNumberWithMarker().

const uint8_t * ndn::Block::value

(

)

const

Get pointer to TLV-VALUE.

Definition at line 311 of file block.cpp.

References hasValue(), and m_valueBegin.

Referenced by ndn::security::pib::PibMemory::addCertificate(), ndn::security::pib::PibSqlite3::addCertificate(), ndn::encoding::Encoder::appendBlock(), ndn::name::Component::compare(), ndn::util::SegmentFetcher::fetch(), ndn::name::Component::fromEscapedString(), ndn::name::Component::fromTimestamp(), ndn::name::Component::getSuccessor(), ndn::name::Component::isNumberWithMarker(), ndn::operator<<(), ndn::operator==(), ndn::security::parse(), ndn::encoding::Encoder::prependBlock(), ndn::encoding::Estimator::prependBlock(), ndn::encoding::readString(), ndn::name::Component::toTimestamp(), ndn::name::Component::toUri(), ndn::security::verifySignature(), and ndn::name::Component::wireEncode().

size_t ndn::Block::value_size

(

)

const

Get size of TLV-VALUE aka TLV-LENGTH.

Definition at line 317 of file block.cpp.

References hasValue(), m_valueBegin, and m_valueEnd.

Referenced by ndn::security::pib::PibMemory::addCertificate(), ndn::security::pib::PibSqlite3::addCertificate(), ndn::encoding::Encoder::appendBlock(), Block(), ndn::name::Component::compare(), ndn::lp::DecodeHelper< TlvType, std::pair< Buffer::const_iterator, Buffer::const_iterator > >::decode(), ndn::name::Component::empty(), ndn::name::Component::equals(), ndn::util::SegmentFetcher::fetch(), ndn::name::Component::getSuccessor(), ndn::name::Component::isImplicitSha256Digest(), ndn::name::Component::isNumber(), ndn::name::Component::isNumberWithMarker(), ndn::operator<<(), ndn::operator==(), ndn::security::parse(), parse(), ndn::encoding::Encoder::prependBlock(), ndn::encoding::Estimator::prependBlock(), ndn::encoding::readNonNegativeInteger(), ndn::encoding::readString(), ndn::name::Component::toNumberWithMarker(), ndn::name::Component::toUri(), ndn::security::verifySignature(), and ndn::name::Component::wireEncode().

Block ndn::Block::blockFromValue

(

)

const

Definition at line 323 of file block.cpp.

References Block(), hasValue(), m_valueBegin, and m_valueEnd.

Referenced by ndn::nfd::Controller::Controller(), ndn::util::DummyClientFace::DummyClientFace(), nfd::ManagerBase::extractRequester(), ndn::security::v2::getKeyLocatorName(), and ndn::MetaInfo::wireDecode().

void ndn::Block::parse

(

)

const

Parse TLV-VALUE into sub elements.

Postcondition

elements() reflects sub elements found in TLV-VALUE

Exceptions

tlv::Error

TLV-VALUE is not a sequence of TLV elements

Note

This method does not perform recursive parsing.

This method has no effect if elements() is already populated.

This method is not really const, but it does not modify any data.

Definition at line 334 of file block.cpp.

References begin(), end(), m_buffer, m_elements, ndn::tlv::readType(), ndn::tlv::readVarNumber(), ndn::to_string(), type(), value_begin(), value_end(), and value_size().

Referenced by ndn::security::v2::CertificateBundleFetcher::doFetch(), nfd::ForwarderStatusManager::ForwarderStatusManager(), ndn::Name::Name(), ndn::nfd::FaceEventNotification::wireDecode(), ndn::nfd::FaceStatus::wireDecode(), ndn::lp::Packet::wireDecode(), ndn::nfd::ChannelStatus::wireDecode(), ndn::nfd::StrategyChoice::wireDecode(), ndn::nfd::FaceQueryFilter::wireDecode(), ndn::nfd::ForwarderStatus::wireDecode(), ndn::mgmt::ControlResponse::wireDecode(), ndn::lp::NackHeader::wireDecode(), ndn::Selectors::wireDecode(), ndn::Exclude::wireDecode(), ndn::nfd::NextHopRecord::wireDecode(), ndn::SignatureInfo::wireDecode(), ndn::DelegationList::wireDecode(), ndn::lp::CachePolicy::wireDecode(), ndn::Interest::wireDecode(), ndn::MetaInfo::wireDecode(), ndn::security::SafeBag::wireDecode(), ndn::KeyLocator::wireDecode(), ndn::nfd::ControlParameters::wireDecode(), ndn::Data::wireDecode(), ndn::security::ValidityPeriod::wireDecode(), ndn::security::v2::AdditionalDescription::wireDecode(), ndn::nfd::Route::wireDecode(), ndn::Name::wireDecode(), ndn::nfd::FibEntry::wireDecode(), ndn::nfd::RibEntry::wireDecode(), ndn::security::ValidityPeriod::wireEncode(), ndn::security::v2::AdditionalDescription::wireEncode(), and ndn::Name::wireEncode().

void ndn::Block::encode

(

)

Encode sub elements into TLV-VALUE.

Postcondition

TLV-VALUE contains sub elements from elements()

Definition at line 362 of file block.cpp.

References hasValue(), hasWire(), m_begin, m_buffer, m_elements, m_end, m_size, m_type, m_valueBegin, and m_valueEnd.

Referenced by ndn::util::DummyClientFace::Transport::receive(), ndn::mgmt::ControlResponse::setBody(), ndn::security::v2::KeyChain::sign(), ndn::lp::Packet::wireEncode(), and ndn::mgmt::ControlResponse::wireEncode().

const Block & ndn::Block::get

(

uint32_t

type

)

const

Get the first sub element of specified TLV-TYPE.

Precondition

parse() has been executed

Exceptions

Error

sub element of type does not exist

Definition at line 416 of file block.cpp.

References find(), m_elements, m_type, and ndn::to_string().

Referenced by ndn::security::v2::CertificateBundleFetcher::doFetch(), ndn::Interest::wireDecode(), and ndn::Data::wireDecode().

Block::element_const_iterator ndn::Block::find

(

uint32_t

type

)

const

Find the first sub element of specified TLV-TYPE.

Precondition

parse() has been executed

Returns

iterator in elements() to the found sub element, otherwise elements_end()

Definition at line 428 of file block.cpp.

References m_elements, and type().

Referenced by get(), ndn::Interest::matchesData(), ndn::Selectors::wireDecode(), ndn::Interest::wireDecode(), ndn::nfd::ControlParameters::wireDecode(), and ndn::Data::wireDecode().

void ndn::Block::remove

(

uint32_t

type

)

Remove all sub elements of specified TLV-TYPE.

Precondition

parse() has been executed

Postcondition

find(type) == elements_end()

Definition at line 435 of file block.cpp.

References m_elements, resetWire(), and type().

Block::element_iterator ndn::Block::erase

(

Block::element_const_iterator

position

)

Erase a sub element.

Definition at line 445 of file block.cpp.

References m_elements, and resetWire().

Block::element_iterator ndn::Block::erase	(	Block::element_const_iterator	first,
		Block::element_const_iterator	last
	)

Erase a range of sub elements.

Definition at line 459 of file block.cpp.

References m_elements, and resetWire().

void ndn::Block::push_back

(

const Block &

element

)

Append a sub element.

Definition at line 475 of file block.cpp.

References m_elements, and resetWire().

Referenced by ndn::mgmt::ControlResponse::wireEncode().

Block::element_iterator ndn::Block::insert	(	Block::element_const_iterator	pos,
		const Block &	element
	)

Insert a sub element.

Parameters

pos	position of new sub element
element	new sub element

Returns

iterator in elements() to the new sub element

Definition at line 482 of file block.cpp.

References m_elements, and resetWire().

Referenced by ndn::lp::Packet::add().

const element_container& ndn::Block::elements ( ) const

inline

Get container of sub elements.

Precondition

parse() has been executed

Definition at line 347 of file block.hpp.

Referenced by ndn::Name::at(), ndn::security::v2::CertificateBundleFetcher::doFetch(), nfd::ForwarderStatusManager::ForwarderStatusManager(), nfd::face::LpFragmenter::fragmentPacket(), ndn::lp::Packet::get(), ndn::lp::Packet::list(), ndn::lp::Packet::wireDecode(), ndn::DelegationList::wireDecode(), ndn::MetaInfo::wireDecode(), ndn::KeyLocator::wireDecode(), ndn::security::ValidityPeriod::wireDecode(), ndn::security::v2::AdditionalDescription::wireDecode(), and ndn::lp::Packet::wireEncode().

element_const_iterator ndn::Block::elements_begin ( ) const

inline

Equivalent to elements().begin()

Definition at line 355 of file block.hpp.

Referenced by ndn::nfd::FaceEventNotification::wireDecode(), ndn::nfd::FaceStatus::wireDecode(), ndn::nfd::ChannelStatus::wireDecode(), ndn::nfd::StrategyChoice::wireDecode(), ndn::nfd::FaceQueryFilter::wireDecode(), ndn::mgmt::ControlResponse::wireDecode(), ndn::nfd::ForwarderStatus::wireDecode(), ndn::lp::NackHeader::wireDecode(), ndn::SignatureInfo::wireDecode(), ndn::lp::CachePolicy::wireDecode(), ndn::MetaInfo::wireDecode(), ndn::security::SafeBag::wireDecode(), ndn::KeyLocator::wireDecode(), and ndn::security::v2::AdditionalDescription::wireDecode().

element_const_iterator ndn::Block::elements_end ( ) const

inline

Equivalent to elements().end()

Definition at line 363 of file block.hpp.

Referenced by ndn::Interest::matchesData(), ndn::nfd::FaceEventNotification::wireDecode(), ndn::nfd::FaceStatus::wireDecode(), ndn::nfd::ChannelStatus::wireDecode(), ndn::nfd::StrategyChoice::wireDecode(), ndn::nfd::FaceQueryFilter::wireDecode(), ndn::nfd::ForwarderStatus::wireDecode(), ndn::mgmt::ControlResponse::wireDecode(), ndn::Selectors::wireDecode(), ndn::SignatureInfo::wireDecode(), ndn::lp::CachePolicy::wireDecode(), ndn::Interest::wireDecode(), ndn::MetaInfo::wireDecode(), ndn::security::SafeBag::wireDecode(), ndn::nfd::ControlParameters::wireDecode(), ndn::Data::wireDecode(), and ndn::security::v2::AdditionalDescription::wireDecode().

size_t ndn::Block::elements_size ( ) const

inline

Equivalent to elements().size()

Definition at line 371 of file block.hpp.

Referenced by ndn::lp::NackHeader::wireDecode(), ndn::security::ValidityPeriod::wireDecode(), and ndn::security::v2::AdditionalDescription::wireDecode().

ndn::Block::operator boost::asio::const_buffer

(

)

const

Implicit conversion to const_buffer.

Definition at line 497 of file block.cpp.

References size(), and wire().

Member Data Documentation

shared_ptr<const Buffer> ndn::Block::m_buffer

protected

underlying buffer storing TLV-VALUE and possibly TLV-TYPE and TLV-LENGTH fields

If m_buffer is nullptr, this is an empty Block with TLV-TYPE given in m_type. Otherwise,

• [m_valueBegin, m_valueEnd) point to TLV-VALUE within m_buffer.
• If m_begin != m_end, [m_begin,m_end) point to Type-Length-Value of this Block within m_buffer. Otherwise, m_buffer does not contain TLV-TYPE and TLV-LENGTH fields.

Definition at line 403 of file block.hpp.

Referenced by Block(), encode(), hasWire(), parse(), and resetWire().

Buffer::const_iterator ndn::Block::m_begin

protected

See also

m_buffer

Definition at line 404 of file block.hpp.

Referenced by begin(), Block(), encode(), hasWire(), resetWire(), and wire().

Buffer::const_iterator ndn::Block::m_end

protected

See also

m_buffer

Definition at line 405 of file block.hpp.

Referenced by Block(), encode(), end(), hasWire(), and resetWire().

Buffer::const_iterator ndn::Block::m_valueBegin

protected

See also

m_buffer

Definition at line 407 of file block.hpp.

Referenced by Block(), blockFromValue(), encode(), resetWire(), value(), and value_size().

Buffer::const_iterator ndn::Block::m_valueEnd

protected

See also

m_buffer

Definition at line 408 of file block.hpp.

Referenced by Block(), blockFromValue(), encode(), resetWire(), and value_size().

uint32_t ndn::Block::m_type

protected

TLV-TYPE.

Definition at line 410 of file block.hpp.

Referenced by Block(), encode(), get(), and reset().

uint32_t ndn::Block::m_size

protected

total size including Type-Length-Value

This field is valid only if empty() is false.

Definition at line 416 of file block.hpp.

Referenced by Block(), encode(), and size().

element_container ndn::Block::m_elements

mutableprotected

sub elements

This field is valid only if parse() has been executed.

Definition at line 422 of file block.hpp.

Referenced by encode(), erase(), find(), get(), insert(), parse(), push_back(), remove(), and reset().

---

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

• ndnSIM/ndn-cxx/src/encoding/block.hpp
• ndnSIM/ndn-cxx/src/encoding/block.cpp