This class encapsulates a collection of data tuples and could be used by multiple options. More...

#include <option_opaque_data_tuples.h>

Inheritance diagram for isc::dhcp::OptionOpaqueDataTuples:

Public Types
typedef std::vector< OpaqueDataTuple >	TuplesCollection
	Collection of opaque data tuples carried by the option.

Public Types inherited from isc::dhcp::Option
typedef OptionPtr	Factory(Option::Universe u, uint16_t type, const OptionBuffer &buf)
	a factory function prototype

enum	Universe { V4 , V6 }
	defines option universe DHCPv4 or DHCPv6 More...

Public Member Functions
	OptionOpaqueDataTuples (Option::Universe u, const uint16_t type, OpaqueDataTuple::LengthFieldType length_field_type=OpaqueDataTuple::LENGTH_EMPTY)
	Constructor.

	OptionOpaqueDataTuples (Option::Universe u, const uint16_t type, OptionBufferConstIter begin, OptionBufferConstIter end, OpaqueDataTuple::LengthFieldType length_field_type=OpaqueDataTuple::LENGTH_EMPTY)
	Constructor.

void	addTuple (const OpaqueDataTuple &tuple)
	Adds a new opaque data tuple to the option.

OptionPtr	clone () const
	Copies this option and returns a pointer to the copy.

OpaqueDataTuple	getTuple (const size_t at) const
	Returns opaque data tuple at the specified position.

const TuplesCollection &	getTuples () const
	Returns collection of opaque data tuples carried in the option.

size_t	getTuplesNum () const
	Returns the number of opaque data tuples added to the option.

bool	hasTuple (const std::string &tuple_str) const
	Checks if the object holds the opaque data tuple with the specified string.

virtual uint16_t	len () const
	Returns the full length of the option, including option header.

virtual void	pack (isc::util::OutputBuffer &buf, bool check=true) const
	Renders option into the buffer in the wire format.

void	setTuple (const size_t at, const OpaqueDataTuple &tuple)
	Replaces tuple at the specified index with a new tuple.

virtual std::string	toText (int indent=0) const
	Returns text representation of the option.

virtual void	unpack (OptionBufferConstIter begin, OptionBufferConstIter end)
	Parses buffer holding an option.

Public Member Functions inherited from isc::dhcp::Option
	Option (const Option &source)
	Copy constructor.

	Option (Universe u, uint16_t type)
	ctor, used for options constructed, usually during transmission

	Option (Universe u, uint16_t type, const OptionBuffer &data)
	Constructor, used for received options.

	Option (Universe u, uint16_t type, OptionBufferConstIter first, OptionBufferConstIter last)
	Constructor, used for received options.

virtual	~Option ()
	just to force that every option has virtual dtor

void	addOption (OptionPtr opt)
	Adds a sub-option.

bool	delOption (uint16_t type)
	Attempts to delete first suboption of requested type.

virtual bool	equals (const Option &other) const
	Checks if two options are equal.

bool	equals (const OptionPtr &other) const
	Checks if options are equal.

virtual const OptionBuffer &	getData () const
	Returns pointer to actual data.

std::string	getEncapsulatedSpace () const
	Returns the name of the option space encapsulated by this option.

virtual uint16_t	getHeaderLen () const
	Returns length of header (2 for v4, 4 for v6)

OptionCollection &	getMutableOptions ()
	Returns all encapsulated options.

OptionPtr	getOption (uint16_t type) const
	Returns shared_ptr to suboption of specific type.

const OptionCollection &	getOptions () const
	Returns all encapsulated options.

void	getOptionsCopy (OptionCollection &options_copy) const
	Performs deep copy of suboptions.

uint16_t	getType () const
	Returns option type (0-255 for DHCPv4, 0-65535 for DHCPv6)

uint16_t	getUint16 () const
	Returns content of first word.

uint32_t	getUint32 () const
	Returns content of first double word.

uint8_t	getUint8 () const
	Returns content of first byte.

Universe	getUniverse () const
	returns option universe (V4 or V6)

Option &	operator= (const Option &rhs)
	Assignment operator.

template<typename InputIterator >
void	setData (InputIterator first, InputIterator last)
	Sets content of this option from buffer.

void	setEncapsulatedSpace (const std::string &encapsulated_space)
	Sets the name of the option space encapsulated by this option.

void	setUint16 (uint16_t value)
	Sets content of this option to a single uint16 value.

void	setUint32 (uint32_t value)
	Sets content of this option to a single uint32 value.

void	setUint8 (uint8_t value)
	Sets content of this option to a single uint8 value.

virtual std::vector< uint8_t >	toBinary (const bool include_header=false) const
	Returns binary representation of the option.

virtual std::string	toHexString (const bool include_header=false) const
	Returns string containing hexadecimal representation of option.

virtual std::string	toString () const
	Returns string representation of the value.

virtual bool	valid () const
	returns if option is valid (e.g.

Additional Inherited Members
Static Public Member Functions inherited from isc::dhcp::Option
static OptionPtr	create (Universe u, uint16_t type)
	Factory function creating an instance of the `Option`.

static OptionPtr	create (Universe u, uint16_t type, const OptionBuffer &data)
	Factory function creating an instance of the `Option`.

static OptionPtr	factory (Option::Universe u, uint16_t type)
	Factory function to create instance of option.

static OptionPtr	factory (Option::Universe u, uint16_t type, const OptionBuffer &buf)
	Factory function to create instance of option.

Static Public Attributes inherited from isc::dhcp::Option
static bool	lenient_parsing_
	Governs whether options should be parsed less strictly.

static const size_t	OPTION4_HDR_LEN = 2
	length of the usual DHCPv4 option header (there are exceptions)

static const size_t	OPTION6_HDR_LEN = 4
	length of any DHCPv6 option header

Protected Member Functions inherited from isc::dhcp::Option
void	check () const
	A protected method used for option correctness.

template<typename OptionType >
OptionPtr	cloneInternal () const
	Copies this option and returns a pointer to the copy.

std::string	headerToText (const int indent=0, const std::string &type_name="") const
	Returns option header in the textual format.

void	packHeader (isc::util::OutputBuffer &buf, bool check=true) const
	Store option's header in a buffer.

void	packOptions (isc::util::OutputBuffer &buf, bool check=true) const
	Store sub options in a buffer.

std::string	suboptionsToText (const int indent=0) const
	Returns collection of suboptions in the textual format.

void	unpackOptions (const OptionBuffer &buf)
	Builds a collection of sub options from the buffer.

Protected Attributes inherited from isc::dhcp::Option
OptionBuffer	data_
	contains content of this data

std::string	encapsulated_space_
	Name of the option space being encapsulated by this option.

OptionCollection	options_
	collection for storing suboptions

uint16_t	type_
	option type (0-255 for DHCPv4, 0-65535 for DHCPv6)

Universe	universe_
	option universe (V4 or V6)

Detailed Description

This class encapsulates a collection of data tuples and could be used by multiple options.

It is tailored for use with the DHCPv6 Bootfile-param option (option 60).

The format of the option is described in section 3.2 of RFC5970. This option may carry an arbitrary number of tuples carrying opaque data. Each tuple consists of a field holding the length of the opaque data followed by a string containing the data itself. For option 60 each length field is 2 bytes long and the data is a UTF-8 string that is not null terminated.

Todo: The class is similar to the class used by the DHCPv6 Vendor Class (16) and DHCPv4 V-I Vendor Class (124) options, though they include an enterprise (or vendor) ID in the option. In the future it may make sense to rewrite the OptionVendorClass to derive from this class.

Definition at line 37 of file option_opaque_data_tuples.h.

Member Typedef Documentation

◆ TuplesCollection

typedef std::vector<OpaqueDataTuple> isc::dhcp::OptionOpaqueDataTuples::TuplesCollection

Collection of opaque data tuples carried by the option.

Definition at line 41 of file option_opaque_data_tuples.h.

Constructor & Destructor Documentation

◆ OptionOpaqueDataTuples() [1/2]

isc::dhcp::OptionOpaqueDataTuples::OptionOpaqueDataTuples	(	Option::Universe	u,
		const uint16_t	type,
		OpaqueDataTuple::LengthFieldType	length_field_type = OpaqueDataTuple::LENGTH_EMPTY )

Constructor.

This constructor creates an instance of an OptionOpaqueDataTuples that can be used for an option such as DHCPv6 Bootfile Parameters (60).

Parameters

u	universe (v4 or v6).
type	option type
length_field_type	Indicates a length of the field which holds the size of the tuple. If not provided explicitly, it is evaluated basing on Option's v4/v6 universe.

Definition at line 17 of file option_opaque_data_tuples.cc.

References isc::dhcp::OptionDataTypeUtil::getTupleLenFieldType(), and isc::dhcp::OpaqueDataTuple::LENGTH_EMPTY.

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◆ OptionOpaqueDataTuples() [2/2]

isc::dhcp::OptionOpaqueDataTuples::OptionOpaqueDataTuples	(	Option::Universe	u,
		const uint16_t	type,
		OptionBufferConstIter	begin,
		OptionBufferConstIter	end,
		OpaqueDataTuple::LengthFieldType	length_field_type = OpaqueDataTuple::LENGTH_EMPTY )

Constructor.

This constructor creates an instance of the option using a buffer with on-wire data. It may throw an exception if the unpack method throws.

Parameters

u	universe (v4 or v6)
type	option type
begin	Iterator pointing to the beginning of the buffer holding an option.
end	Iterator pointing to the end of the buffer holding an option.
length_field_type	Indicates a length of the field which holds the size of the tuple. If not provided explicitly, it is evaluated basing on Option's v4/v6 universe.

Definition at line 26 of file option_opaque_data_tuples.cc.

References isc::dhcp::OptionDataTypeUtil::getTupleLenFieldType(), isc::dhcp::OpaqueDataTuple::LENGTH_EMPTY, and unpack().

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Member Function Documentation

◆ addTuple()

void isc::dhcp::OptionOpaqueDataTuples::addTuple ( const OpaqueDataTuple & tuple )

Adds a new opaque data tuple to the option.

Parameters

tuple Tuple to be added.

Exceptions

isc::BadValue if the type of the tuple doesn't match the universe this option belongs to.

Definition at line 74 of file option_opaque_data_tuples.cc.

References isc_throw.

Referenced by unpack().

◆ clone()

OptionPtr isc::dhcp::OptionOpaqueDataTuples::clone ( ) const

virtual

Copies this option and returns a pointer to the copy.

Reimplemented from isc::dhcp::Option.

Definition at line 39 of file option_opaque_data_tuples.cc.

◆ getTuple()

OpaqueDataTuple isc::dhcp::OptionOpaqueDataTuples::getTuple ( const size_t at ) const

Returns opaque data tuple at the specified position.

If the specified position is out of range an exception is thrown.

Parameters

at	Index for which tuple to get.

Exceptions

isc::OutOfRange if the tuple position is out of range.

Definition at line 102 of file option_opaque_data_tuples.cc.

References getTuplesNum(), and isc_throw.

Referenced by toText().

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◆ getTuples()

const TuplesCollection & isc::dhcp::OptionOpaqueDataTuples::getTuples ( ) const

inline

Returns collection of opaque data tuples carried in the option.

Definition at line 129 of file option_opaque_data_tuples.h.

◆ getTuplesNum()

size_t isc::dhcp::OptionOpaqueDataTuples::getTuplesNum ( ) const

inline

Returns the number of opaque data tuples added to the option.

Definition at line 124 of file option_opaque_data_tuples.h.

Referenced by getTuple(), setTuple(), and toText().

◆ hasTuple()

bool isc::dhcp::OptionOpaqueDataTuples::hasTuple ( const std::string & tuple_str ) const

Checks if the object holds the opaque data tuple with the specified string.

Parameters

tuple_str String representation of the tuple being searched.

Returns: true if the specified tuple exists for this option.

Definition at line 112 of file option_opaque_data_tuples.cc.

◆ len()

uint16_t isc::dhcp::OptionOpaqueDataTuples::len ( ) const

virtual

Returns the full length of the option, including option header.

Reimplemented from isc::dhcp::Option.

Definition at line 124 of file option_opaque_data_tuples.cc.

References isc::dhcp::Option::getHeaderLen().

Referenced by toText().

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◆ pack()

void isc::dhcp::OptionOpaqueDataTuples::pack	(	isc::util::OutputBuffer &	buf,
		bool	check = true ) const

virtual

Renders option into the buffer in the wire format.

Parameters

[out]	buf	Buffer to which the option is rendered.
	check	if set to false, allows options larger than 255 for v4

Reimplemented from isc::dhcp::Option.

Definition at line 44 of file option_opaque_data_tuples.cc.

References isc::dhcp::Option::check(), and isc::dhcp::Option::packHeader().

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◆ setTuple()

void isc::dhcp::OptionOpaqueDataTuples::setTuple	(	const size_t	at,
		const OpaqueDataTuple &	tuple )

Replaces tuple at the specified index with a new tuple.

This function replaces an opaque data tuple at the specified position with the new tuple. If the specified index is out of range an exception is thrown.

Parameters

at	Index at which the tuple should be replaced.
tuple	Tuple to be set.

Exceptions

isc::OutOfRange	if the tuple position is out of range.
isc::BadValue	if the type of the tuple doesn't match the universe this option belongs to.

Definition at line 86 of file option_opaque_data_tuples.cc.

References getTuplesNum(), and isc_throw.

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◆ toText()

std::string isc::dhcp::OptionOpaqueDataTuples::toText ( int indent = 0 ) const

virtual

Returns text representation of the option.

Parameters

indent Number of space characters before text.

Returns: Text representation of the option.

Reimplemented from isc::dhcp::Option.

Definition at line 136 of file option_opaque_data_tuples.cc.

References isc::dhcp::Option::getHeaderLen(), isc::dhcp::OpaqueDataTuple::getLength(), getTuple(), getTuplesNum(), isc::dhcp::Option::getType(), and len().

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◆ unpack()

void isc::dhcp::OptionOpaqueDataTuples::unpack	(	OptionBufferConstIter	begin,
		OptionBufferConstIter	end )

virtual

Parses buffer holding an option.

This function parses the buffer holding an option and initializes option properties: the collection of tuples.

Parameters

begin	Iterator pointing to the beginning of the buffer holding an option.
end	Iterator pointing to the end of the buffer holding an option.

Reimplemented from isc::dhcp::Option.

Definition at line 55 of file option_opaque_data_tuples.cc.

References addTuple().

Referenced by OptionOpaqueDataTuples().

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

Public Types

Public Member Functions

Additional Inherited Members

Detailed Description

Member Typedef Documentation

◆ TuplesCollection

Constructor & Destructor Documentation

◆ OptionOpaqueDataTuples() [1/2]

◆ OptionOpaqueDataTuples() [2/2]

Member Function Documentation

◆ addTuple()

◆ clone()

◆ getTuple()

◆ getTuples()

◆ getTuplesNum()

◆ hasTuple()

◆ len()

◆ pack()

◆ setTuple()

◆ toText()

◆ unpack()