DHCPv4 Option class for handling list of IPv4 addresses. More...

#include <option4_addrlst.h>

Inheritance diagram for isc::dhcp::Option4AddrLst:

Public Types
typedef std::vector< isc::asiolink::IOAddress >	AddressContainer
	Defines a collection of IPv4 addresses.

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
	Option4AddrLst (uint8_t type)
	Constructor, creates an option with empty list of addresses.

	Option4AddrLst (uint8_t type, const AddressContainer &addrs)
	Constructor, creates an option with a list of addresses.

	Option4AddrLst (uint8_t type, const isc::asiolink::IOAddress &addr)
	Constructor, creates an option with a single address.

	Option4AddrLst (uint8_t type, OptionBufferConstIter first, OptionBufferConstIter last)
	Constructor, used for received options.

void	addAddress (const isc::asiolink::IOAddress &addr)
	Adds address to existing list of addresses.

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

AddressContainer	getAddresses () const
	Returns vector with addresses.

virtual uint16_t	len () const
	Returns length of the complete option (data length + DHCPv4/DHCPv6 option header)

virtual void	pack (isc::util::OutputBuffer &buf, bool check=true) const
	Writes option in a wire-format to a buffer.

void	setAddress (const isc::asiolink::IOAddress &addr)
	Clears address list and sets a single address.

void	setAddresses (const AddressContainer &addrs)
	Sets addresses list.

virtual std::string	toText (int indent=0) const
	Returns string representation of the 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 void	unpack (OptionBufferConstIter begin, OptionBufferConstIter end)
	Parses received buffer.

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

Protected Attributes
AddressContainer	addrs_
	contains list of addresses

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)

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.

Detailed Description

DHCPv4 Option class for handling list of IPv4 addresses.

This class handles a list of IPv4 addresses. An example of such option is dns-servers option. It can also be used to handle a single address.

Definition at line 34 of file option4_addrlst.h.

Member Typedef Documentation

◆ AddressContainer

std::vector<isc::asiolink::IOAddress> isc::dhcp::Option4AddrLst::AddressContainer

Defines a collection of IPv4 addresses.

Definition at line 38 of file option4_addrlst.h.

Constructor & Destructor Documentation

◆ Option4AddrLst() [1/4]

isc::dhcp::Option4AddrLst::Option4AddrLst ( uint8_t type )

Constructor, creates an option with empty list of addresses.

Creates empty option that can hold addresses. Addresses can be added with addAddress(), setAddress() or setAddresses().

Parameters

type	option type

Definition at line 28 of file option4_addrlst.cc.

◆ Option4AddrLst() [2/4]

isc::dhcp::Option4AddrLst::Option4AddrLst	(	uint8_t	type,
		const AddressContainer &	addrs )

Constructor, creates an option with a list of addresses.

Creates an option that contains specified list of IPv4 addresses.

Parameters

type	option type
addrs	container with a list of addresses

Definition at line 32 of file option4_addrlst.cc.

References setAddresses().

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◆ Option4AddrLst() [3/4]

isc::dhcp::Option4AddrLst::Option4AddrLst	(	uint8_t	type,
		const isc::asiolink::IOAddress &	addr )

Constructor, creates an option with a single address.

Creates an option that contains a single address.

Parameters

type	option type
addr	a single address that will be stored as 1-elem. address list

Definition at line 55 of file option4_addrlst.cc.

References setAddress().

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◆ Option4AddrLst() [4/4]

isc::dhcp::Option4AddrLst::Option4AddrLst	(	uint8_t	type,
		OptionBufferConstIter	first,
		OptionBufferConstIter	last )

Constructor, used for received options.

TODO: This can be templated to use different containers, not just vector. Prototype should look like this: template<typename InputIterator> Option(Universe u, uint16_t type, InputIterator first, InputIterator last);

vector<int8_t> myData; Example usage: new Option(V4, 123, myData.begin()+1, myData.end()-1) This will create DHCPv4 option of type 123 that contains data from trimmed (first and last byte removed) myData vector.

Parameters

type	option type (0-255 for V4 and 0-65535 for V6)
first	iterator to the first element that should be copied
last	iterator to the next element after the last one to be copied.

Definition at line 39 of file option4_addrlst.cc.

References addAddress(), isc_throw, isc::util::readUint32(), and isc::dhcp::Option::type_.

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Member Function Documentation

◆ addAddress()

void isc::dhcp::Option4AddrLst::addAddress ( const isc::asiolink::IOAddress & addr )

Adds address to existing list of addresses.

Adds a single address to that list. See setAddress() if you want to define only a single address or setAddresses() if you want to set the whole list at once.

Passed address must be IPv4 address. Otherwise BadValue exception will be thrown.

Parameters

addr	an address that is going to be added to existing list

Definition at line 101 of file option4_addrlst.cc.

References addrs_, isc_throw, and isc::asiolink::IOAddress::isV4().

Referenced by Option4AddrLst(), setAddress(), and setAddresses().

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◆ clone()

OptionPtr isc::dhcp::Option4AddrLst::clone ( ) const

virtual

Copies this option and returns a pointer to the copy.

Reimplemented from isc::dhcp::Option.

Definition at line 61 of file option4_addrlst.cc.

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

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◆ getAddresses()

AddressContainer isc::dhcp::Option4AddrLst::getAddresses ( ) const

inline

Returns vector with addresses.

We return a copy of our list. Although this includes overhead, it also makes this list safe to use after this option object is no longer available. As options are expected to hold only a few (1-3) addresses, the overhead is not that big.

Returns: address container with addresses

Definition at line 115 of file option4_addrlst.h.

References addrs_.

◆ len()

uint16_t isc::dhcp::Option4AddrLst::len ( ) const

virtual

Returns length of the complete option (data length + DHCPv4/DHCPv6 option header)

Returns: length of the option

Reimplemented from isc::dhcp::Option.

Definition at line 109 of file option4_addrlst.cc.

References addrs_, and isc::dhcp::Option::getHeaderLen().

Referenced by pack().

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◆ pack()

void isc::dhcp::Option4AddrLst::pack	(	isc::util::OutputBuffer &	buf,
		bool	check = true ) const

virtual

Writes option in a wire-format to a buffer.

Method will throw if option storing fails for some reason.

Parameters

buf	output buffer (option will be stored there)
check	if set to false, allows options larger than 255 for v4

Reimplemented from isc::dhcp::Option.

Definition at line 66 of file option4_addrlst.cc.

References addrs_, isc::dhcp::Option::check(), isc::dhcp::Option::getHeaderLen(), isc_throw, len(), isc::dhcp::Option::type_, isc::util::OutputBuffer::writeUint32(), and isc::util::OutputBuffer::writeUint8().

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◆ setAddress()

void isc::dhcp::Option4AddrLst::setAddress ( const isc::asiolink::IOAddress & addr )

Clears address list and sets a single address.

Clears existing list of addresses and adds a single address to that list. This is very convenient method for options that are supposed to only a single option. See addAddress() if you want to add address to existing list or setAddresses() if you want to set the whole list at once.

Passed address must be IPv4 address. Otherwise BadValue exception will be thrown.

Parameters

addr	an address that is going to be set as 1-element address list

Definition at line 83 of file option4_addrlst.cc.

References addAddress(), addrs_, isc_throw, and isc::asiolink::IOAddress::isV4().

Referenced by Option4AddrLst().

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◆ setAddresses()

void isc::dhcp::Option4AddrLst::setAddresses ( const AddressContainer & addrs )

Sets addresses list.

Clears existing list of addresses and adds a single address to that list. This is very convenient method for options that are supposed to only a single option. See addAddress() if you want to add address to existing list or setAddresses() if you want to set the whole list at once.

Passed address must be IPv4 address. Otherwise BadValue exception will be thrown.

Parameters

addrs address collection to be set

Definition at line 92 of file option4_addrlst.cc.

References addAddress(), and addrs_.

Referenced by Option4AddrLst().

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◆ toText()

std::string isc::dhcp::Option4AddrLst::toText ( int indent = 0 ) const

virtual

Returns string representation of the option.

Parameters

indent number of spaces before printing text

Returns: string with text representation.

Reimplemented from isc::dhcp::Option.

Definition at line 114 of file option4_addrlst.cc.

References addrs_, and isc::dhcp::Option::headerToText().

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Member Data Documentation

◆ addrs_

AddressContainer isc::dhcp::Option4AddrLst::addrs_

protected

contains list of addresses

Definition at line 159 of file option4_addrlst.h.

Referenced by addAddress(), getAddresses(), len(), pack(), setAddress(), setAddresses(), and toText().

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

Public Types

Public Member Functions

Protected Attributes

Additional Inherited Members

Detailed Description

Member Typedef Documentation

◆ AddressContainer

Constructor & Destructor Documentation

◆ Option4AddrLst() [1/4]

◆ Option4AddrLst() [2/4]

◆ Option4AddrLst() [3/4]

◆ Option4AddrLst() [4/4]

Member Function Documentation

◆ addAddress()

◆ clone()

◆ getAddresses()

◆ len()

◆ pack()

◆ setAddress()

◆ setAddresses()

◆ toText()

Member Data Documentation

◆ addrs_