Represents DHCPv4 Client FQDN Option (code 81). More...

#include <option4_client_fqdn.h>

Inheritance diagram for isc::dhcp::Option4ClientFqdn:

Classes
class	Rcode
	Represents the value of one of the RCODE1 or RCODE2 fields. More...

A set of constants used to identify and set bits in the flags field
enum	DomainNameType : int { PARTIAL , FULL }
	Type of the domain-name: partial or full. More...

static const uint8_t	FLAG_S = 0x01
	Bit S.

static const uint8_t	FLAG_O = 0x02
	Bit O.

static const uint8_t	FLAG_E = 0x04
	Bit E.

static const uint8_t	FLAG_N = 0x08
	Bit N.

static const uint8_t	FLAG_MASK = 0xF
	Mask which zeroes MBZ flag bits.

static const uint16_t	FIXED_FIELDS_LEN = 3
	The size in bytes of the fixed fields within DHCPv4 Client Fqdn Option.

	Option4ClientFqdn (const uint8_t flags, const Rcode &rcode, const std::string &domain_name, const DomainNameType domain_name_type=FULL)
	Constructor, creates option instance using flags and domain name.

	Option4ClientFqdn (const uint8_t flags, const Rcode &rcode)
	Constructor, creates option instance with empty domain name.

	Option4ClientFqdn (OptionBufferConstIter first, OptionBufferConstIter last)
	Constructor, creates an option instance from part of the buffer.

	Option4ClientFqdn (const Option4ClientFqdn &source)
	Copy constructor.

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

virtual	~Option4ClientFqdn ()
	Destructor.

Option4ClientFqdn &	operator= (const Option4ClientFqdn &source)
	Assignment operator.

bool	getFlag (const uint8_t flag) const
	Checks if the specified flag of the DHCPv4 Client FQDN Option is set.

void	setFlag (const uint8_t flag, const bool set)
	Modifies the value of the specified DHCPv4 Client Fqdn Option flag.

void	resetFlags ()
	Sets the flag field value to 0.

std::pair< Rcode, Rcode >	getRcode () const
	Returns `Rcode` objects representing value of RCODE1 and RCODE2.

void	setRcode (const Rcode &rcode)
	Set Rcode value.

std::string	getDomainName () const
	Returns the domain-name in the text format.

void	packDomainName (isc::util::OutputBuffer &buf) const
	Writes domain-name in the wire format into a buffer.

void	setDomainName (const std::string &domain_name, const DomainNameType domain_name_type)
	Set new domain-name.

void	resetDomainName ()
	Set empty domain-name.

DomainNameType	getDomainNameType () const
	Returns enumerator value which indicates whether domain-name is partial or full.

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

virtual void	unpack (OptionBufferConstIter first, OptionBufferConstIter last)
	Parses option from the received buffer.

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

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

Well known Rcode declarations for DHCPv4 Client FQDN Option
static const Rcode &	RCODE_SERVER ()
	Rcode being set by the server.

static const Rcode &	RCODE_CLIENT ()
	Rcode being set by the client.

Additional Inherited Members
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 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.

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

Represents DHCPv4 Client FQDN Option (code 81).

This option has been defined in the RFC 4702 and it has a following structure:

Code (1 octet) - option code (always equal to 81).
Len (1 octet) - a length of the option.
Flags (1 octet) - a field carrying "NEOS" flags described below.
RCODE1 (1 octet) - deprecated field which should be set to 0 by the client and set to 255 by the server.
RCODE2 (1 octet) - deprecated, should be used in the same way as RCODE1.
Domain Name - variable length field comprising partial or fully qualified domain name.

The flags field has the following structure:

 0 1 2 3 4 5 6 7
+-+-+-+-+-+-+-+-+
|  MBZ  |N|E|O|S|
+-+-+-+-+-+-+-+-+

where:

N flag specifies whether server should (0) or should not (1) perform DNS Update,
E flag specifies encoding of the Domain Name field. If this flag is set to 1 it indicates canonical wire format without compression. 0 indicates the deprecated ASCII format.
O flag is set by the server to indicate that it has overridden client's preference set with the S bit.
S flag specifies whether server should (1) or should not (0) perform forward (FQDN-to-address) updates.

This class exposes a set of functions to modify flags and check their correctness.

Domain names being carried by DHCPv4 Client Fqdn Option can be fully qualified or partial. Partial domain names are encoded similar to the fully qualified domain names, except that they lack terminating zero at the end of their wire representation (or lack of dot at the end, in case of ASCII encoding). It is also accepted to create an instance of this option which has empty domain-name. Clients use empty domain-names to indicate that server should generate complete fully qualified domain-name.

Since domain names are case insensitive (see RFC 4343), this class converts them to lower case format regardless if they are received over the wire or created from strings.

Warning

: The RFC4702 section 2.3.1 states that the clients and servers should use character sets specified in RFC952, section 2.1 for ASCII-encoded domain-names. This class doesn't detect the character set violation for ASCII-encoded domain-name. It could be implemented in the future but it is not important now for two reasons:

ASCII encoding is deprecated
clients SHOULD obey restrictions but if they don't, server may still process the option

RFC 4702 mandates that the DHCP client sets RCODE1 and RCODE2 to 0 and that server sets them to 255. This class allows to set the value for these fields and both fields are always set to the same value. There is no way to set them separately (e.g. set different value for RCODE1 and RCODE2). However, there are no use cases which would require it.

Design choice: This class uses pimpl idiom to separate the interface from implementation specifics. Implementations may use different approaches to handle domain names (mostly validation of the domain-names). The existing isc::dns::Name class is a natural (and the simplest) choice to handle domain-names. Use of this class however, implies that libdhcp must be linked with libdns. At some point these libraries may need to be separated, i.e. to support compilation and use of standalone DHCP server. This will require that the part of implementation which deals with domain-names is modified to not use classes from libdns. These changes will be transparent for this interface.

Definition at line 110 of file option4_client_fqdn.h.

Member Enumeration Documentation

◆ DomainNameType

enum isc::dhcp::Option4ClientFqdn::DomainNameType : int

Type of the domain-name: partial or full.

Enumerator
PARTIAL
FULL

Definition at line 148 of file option4_client_fqdn.h.

Constructor & Destructor Documentation

◆ Option4ClientFqdn() [1/4]

isc::dhcp::Option4ClientFqdn::Option4ClientFqdn	(	const uint8_t	flags,
		const Rcode &	rcode,
		const std::string &	domain_name,
		const DomainNameType	domain_name_type = FULL )

explicit

Constructor, creates option instance using flags and domain name.

This constructor is used to create an instance of the option which will be included in outgoing messages.

Note that the RCODE values are encapsulated by the Rcode object (not a simple uint8_t value). This helps to prevent a caller from confusing the flags value with rcode value (both are uint8_t values). For example: if caller swaps the two, it will be detected in the compilation time. Also, this API encourages the caller to use two predefined functions: RCODE_SERVER and RCODE_CLIENT to set the value of RCODE. These functions generate objects which represent the only valid values to be be passed to the constructor (255 and 0 respectively). Other values should not be used. However, it is still possible that the other entity (client or server) sends the option with invalid value. Although, the RCODE values are ignored, there should be a way to represent such invalid RCODE value. The Rcode class is capable of representing it.

Parameters

flags	a combination of flags to be stored in flags field.
rcode	`Rcode` object representing a value for RCODE1 and RCODE2 fields of the option. Both fields are assigned the same value encapsulated by the parameter.
domain_name	a name to be stored in the domain-name field.
domain_name_type	indicates if the domain name is partial or full.

Exceptions

InvalidOption4FqdnFlags	if value of the flags field is wrong.
InvalidOption4FqdnDomainName	if the domain-name is invalid.

Definition at line 339 of file option4_client_fqdn.cc.

◆ Option4ClientFqdn() [2/4]

isc::dhcp::Option4ClientFqdn::Option4ClientFqdn	(	const uint8_t	flags,
		const Rcode &	rcode )

Constructor, creates option instance with empty domain name.

This constructor creates an instance of the option with empty domain-name. This domain-name is marked partial.

Parameters

flags	a combination of flags to be stored in flags field.
rcode	`Rcode` object representing a value for RCODE1 and RCODE2 fields. Both fields are assigned the same value encapsulated by this parameter.

Exceptions

InvalidOption4FqdnFlags if value of the flags field is invalid.

Definition at line 334 of file option4_client_fqdn.cc.

◆ Option4ClientFqdn() [3/4]

isc::dhcp::Option4ClientFqdn::Option4ClientFqdn	(	OptionBufferConstIter	first,
		OptionBufferConstIter	last )

explicit

Constructor, creates an option instance from part of the buffer.

This constructor is mainly used to parse options in the received messages. Function parameters specify buffer bounds from which the option should be created. The size of the buffer chunk, specified by the constructor's parameters should be equal or larger than the size of the option. Otherwise, constructor will throw an exception.

Parameters

first	the lower bound of the buffer to create option from.
last	the upper bound of the buffer to create option from.

Exceptions

InvalidOption4FqdnFlags	if value of the flags field is invalid.
InvalidOption4FqdnDomainName	if the domain-name carried by the option is invalid.
OutOfRange	if the option is truncated.

Definition at line 348 of file option4_client_fqdn.cc.

◆ Option4ClientFqdn() [4/4]

isc::dhcp::Option4ClientFqdn::Option4ClientFqdn ( const Option4ClientFqdn & source )

Copy constructor.

Definition at line 358 of file option4_client_fqdn.cc.

◆ ~Option4ClientFqdn()

isc::dhcp::Option4ClientFqdn::~Option4ClientFqdn ( )

virtual

Destructor.

Definition at line 354 of file option4_client_fqdn.cc.

Member Function Documentation

◆ clone()

OptionPtr isc::dhcp::Option4ClientFqdn::clone ( ) const

virtual

Copies this option and returns a pointer to the copy.

Reimplemented from isc::dhcp::Option.

Definition at line 364 of file option4_client_fqdn.cc.

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

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◆ getDomainName()

std::string isc::dhcp::Option4ClientFqdn::getDomainName ( ) const

Returns the domain-name in the text format.

If domain-name is partial, it lacks the dot at the end (e.g. myhost). If domain-name is fully qualified, it has the dot at the end (e.g. myhost.example.com.).

Returns: domain-name in the text format.

Definition at line 436 of file option4_client_fqdn.cc.

References isc::dhcp::Option4ClientFqdnImpl::domain_name_, isc::dhcp::Option4ClientFqdnImpl::domain_name_type_, and PARTIAL.

Referenced by len(), packDomainName(), and toText().

◆ getDomainNameType()

Option4ClientFqdn::DomainNameType isc::dhcp::Option4ClientFqdn::getDomainNameType ( ) const

Returns enumerator value which indicates whether domain-name is partial or full.

Returns: An enumerator value indicating whether domain-name is partial or full.

Definition at line 486 of file option4_client_fqdn.cc.

References isc::dhcp::Option4ClientFqdnImpl::domain_name_type_.

Referenced by toText().

◆ getFlag()

bool isc::dhcp::Option4ClientFqdn::getFlag ( const uint8_t flag ) const

Checks if the specified flag of the DHCPv4 Client FQDN Option is set.

Parameters

flag	A value specifying a bit within flags field to be checked. It must be one of the following `FLAG_S`, `FLAG_E`, `FLAG_O`, `FLAG_N`.

Returns: true if the bit of the specified flags bit is set, false otherwise.

Exceptions

InvalidOption4ClientFlags if specified flag which value is to be returned is invalid (is not one of the FLAG_S, FLAG_N, FLAG_O).

is invalid and results in the exception.

Definition at line 381 of file option4_client_fqdn.cc.

References FLAG_E, FLAG_N, FLAG_O, FLAG_S, isc::dhcp::Option4ClientFqdnImpl::flags_, and isc_throw.

Referenced by len(), packDomainName(), and toText().

◆ getRcode()

std::pair< Option4ClientFqdn::Rcode, Option4ClientFqdn::Rcode > isc::dhcp::Option4ClientFqdn::getRcode ( ) const

Returns Rcode objects representing value of RCODE1 and RCODE2.

Returns: Pair of Rcode objects of which first is the RCODE1 and the second is RCODE2.

Definition at line 420 of file option4_client_fqdn.cc.

References isc::dhcp::Option4ClientFqdnImpl::rcode1_, and isc::dhcp::Option4ClientFqdnImpl::rcode2_.

◆ len()

uint16_t isc::dhcp::Option4ClientFqdn::len ( ) const

virtual

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

Returns: length of the option.

Reimplemented from isc::dhcp::Option.

Definition at line 532 of file option4_client_fqdn.cc.

References isc::dhcp::Option4ClientFqdnImpl::domain_name_, isc::dhcp::Option4ClientFqdnImpl::domain_name_type_, FIXED_FIELDS_LEN, FLAG_E, FULL, getDomainName(), getFlag(), and isc::dhcp::Option::getHeaderLen().

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◆ operator=()

Option4ClientFqdn & isc::dhcp::Option4ClientFqdn::operator= ( const Option4ClientFqdn & source )

Assignment operator.

Definition at line 372 of file option4_client_fqdn.cc.

References isc::dhcp::Option::operator=().

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◆ pack()

void isc::dhcp::Option4ClientFqdn::pack	(	isc::util::OutputBuffer &	buf,
		bool	check = true ) const

virtual

Writes option in the wire format into a buffer.

Parameters

[out]	buf	output buffer where option data will be stored.
	check	if set to false, allows options larger than 255 for v4

Reimplemented from isc::dhcp::Option.

Definition at line 491 of file option4_client_fqdn.cc.

References isc::dhcp::Option::check(), isc::dhcp::Option4ClientFqdnImpl::flags_, isc::dhcp::Option4ClientFqdn::Rcode::getCode(), packDomainName(), isc::dhcp::Option::packHeader(), isc::dhcp::Option4ClientFqdnImpl::rcode1_, isc::dhcp::Option4ClientFqdnImpl::rcode2_, and isc::util::OutputBuffer::writeUint8().

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◆ packDomainName()

void isc::dhcp::Option4ClientFqdn::packDomainName ( isc::util::OutputBuffer & buf ) const

Writes domain-name in the wire format into a buffer.

The data being written are appended at the end of the buffer.

Parameters

[out] buf buffer where domain-name will be written.

Definition at line 447 of file option4_client_fqdn.cc.

References isc::dhcp::Option4ClientFqdnImpl::domain_name_, isc::dhcp::Option4ClientFqdnImpl::domain_name_type_, FLAG_E, isc::dns::LabelSequence::getData(), isc::dns::LabelSequence::getDataLength(), getDomainName(), getFlag(), PARTIAL, and isc::util::OutputBuffer::writeData().

Referenced by pack().

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◆ RCODE_CLIENT()

static const Rcode & isc::dhcp::Option4ClientFqdn::RCODE_CLIENT ( )

inlinestatic

Rcode being set by the client.

Definition at line 359 of file option4_client_fqdn.h.

◆ RCODE_SERVER()

static const Rcode & isc::dhcp::Option4ClientFqdn::RCODE_SERVER ( )

inlinestatic

Rcode being set by the server.

Definition at line 353 of file option4_client_fqdn.h.

◆ resetDomainName()

void isc::dhcp::Option4ClientFqdn::resetDomainName ( )

Set empty domain-name.

This function is equivalent to Option6ClientFqdn::setDomainName with empty partial domain-name. It is exception safe.

Definition at line 481 of file option4_client_fqdn.cc.

References PARTIAL, and setDomainName().

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◆ resetFlags()

void isc::dhcp::Option4ClientFqdn::resetFlags ( )

Sets the flag field value to 0.

Definition at line 431 of file option4_client_fqdn.cc.

References isc::dhcp::Option4ClientFqdnImpl::flags_.

◆ setDomainName()

void isc::dhcp::Option4ClientFqdn::setDomainName	(	const std::string &	domain_name,
		const DomainNameType	domain_name_type )

Set new domain-name.

Parameters

domain_name	domain name field value in the text format.
domain_name_type	type of the domain name: partial or fully qualified.

Exceptions

InvalidOption4FqdnDomainName if the specified domain-name is invalid.

Definition at line 475 of file option4_client_fqdn.cc.

References isc::dhcp::Option4ClientFqdnImpl::setDomainName().

Referenced by resetDomainName().

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◆ setFlag()

void isc::dhcp::Option4ClientFqdn::setFlag	(	const uint8_t	flag,
		const bool	set )

Modifies the value of the specified DHCPv4 Client Fqdn Option flag.

Parameters

flag	A value specifying a bit within flags field to be set. It must be one of the following `FLAG_S`, `FLAG_E`, `FLAG_O`, `FLAG_N`.
set	a boolean value which indicates whether flag should be set (true), or cleared (false).

Exceptions

InvalidOption4ClientFlags if specified flag which value is to be set is invalid (is not one of the FLAG_S, FLAG_N, FLAG_O).

Definition at line 393 of file option4_client_fqdn.cc.

References isc::dhcp::Option4ClientFqdnImpl::checkFlags(), FLAG_MASK, isc::dhcp::Option4ClientFqdnImpl::flags_, and isc_throw.

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◆ setRcode()

void isc::dhcp::Option4ClientFqdn::setRcode ( const Rcode & rcode )

Set Rcode value.

Parameters

rcode An Rcode object representing value of RCODE1 and RCODE2. Both fields are assigned the same value.

Definition at line 425 of file option4_client_fqdn.cc.

References isc::dhcp::Option4ClientFqdnImpl::rcode1_, and isc::dhcp::Option4ClientFqdnImpl::rcode2_.

◆ toText()

std::string isc::dhcp::Option4ClientFqdn::toText ( int indent = 0 ) const

virtual

Returns string representation of the option.

The string returned by the method comprises the bit value of each option flag and the domain-name.

Parameters

indent number of spaces before printed text.

Returns: string with text representation.

Reimplemented from isc::dhcp::Option.

Definition at line 515 of file option4_client_fqdn.cc.

References FLAG_E, FLAG_N, FLAG_O, FLAG_S, getDomainName(), getDomainNameType(), getFlag(), PARTIAL, and isc::dhcp::Option::type_.

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◆ unpack()

void isc::dhcp::Option4ClientFqdn::unpack	(	OptionBufferConstIter	first,
		OptionBufferConstIter	last )

virtual

Parses option from the received buffer.

Method creates an instance of the DHCPv4 Client FQDN Option from the wire format. Parameters specify the bounds of the buffer to read option data from. The size of the buffer limited by the specified parameters should be equal or larger than size of the option (including its header). Otherwise exception will be thrown.

Parameters

first	lower bound of the buffer to parse option from.
last	upper bound of the buffer to parse option from.

Reimplemented from isc::dhcp::Option.

Definition at line 504 of file option4_client_fqdn.cc.

References isc::dhcp::Option4ClientFqdnImpl::checkFlags(), isc::dhcp::Option4ClientFqdnImpl::flags_, isc::dhcp::Option4ClientFqdnImpl::parseWireData(), and isc::dhcp::Option::setData().

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Member Data Documentation

◆ FIXED_FIELDS_LEN

const uint16_t isc::dhcp::Option4ClientFqdn::FIXED_FIELDS_LEN = 3

static

The size in bytes of the fixed fields within DHCPv4 Client Fqdn Option.

The fixed fields are:

Flags
RCODE1
RCODE2

Definition at line 160 of file option4_client_fqdn.h.

Referenced by len(), and isc::dhcp::Option4ClientFqdnImpl::parseWireData().

◆ FLAG_E

const uint8_t isc::dhcp::Option4ClientFqdn::FLAG_E = 0x04

static

Bit E.

Definition at line 118 of file option4_client_fqdn.h.

Referenced by getFlag(), len(), packDomainName(), isc::dhcp::Option4ClientFqdnImpl::parseWireData(), and toText().

◆ FLAG_MASK

const uint8_t isc::dhcp::Option4ClientFqdn::FLAG_MASK = 0xF

static

Mask which zeroes MBZ flag bits.

Definition at line 123 of file option4_client_fqdn.h.

Referenced by isc::dhcp::Option4ClientFqdnImpl::checkFlags(), and setFlag().

◆ FLAG_N

const uint8_t isc::dhcp::Option4ClientFqdn::FLAG_N = 0x08

static

Bit N.

Definition at line 119 of file option4_client_fqdn.h.

Referenced by isc::dhcp::Option4ClientFqdnImpl::checkFlags(), getFlag(), isc::dhcp::Dhcpv4Srv::processClientName(), and toText().

◆ FLAG_O

const uint8_t isc::dhcp::Option4ClientFqdn::FLAG_O = 0x02

static

Bit O.

Definition at line 117 of file option4_client_fqdn.h.

Referenced by getFlag(), and toText().

◆ FLAG_S

const uint8_t isc::dhcp::Option4ClientFqdn::FLAG_S = 0x01

static

Bit S.

Definition at line 116 of file option4_client_fqdn.h.

Referenced by isc::dhcp::Option4ClientFqdnImpl::checkFlags(), getFlag(), isc::dhcp::Dhcpv4Srv::processClientName(), and toText().

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

Classes

A set of constants used to identify and set bits in the flags field

Well known Rcode declarations for DHCPv4 Client FQDN Option

Additional Inherited Members

Detailed Description

Member Enumeration Documentation

◆ DomainNameType

Constructor & Destructor Documentation

◆ Option4ClientFqdn() [1/4]

◆ Option4ClientFqdn() [2/4]

◆ Option4ClientFqdn() [3/4]

◆ Option4ClientFqdn() [4/4]

◆ ~Option4ClientFqdn()

Member Function Documentation

◆ clone()

◆ getDomainName()

◆ getDomainNameType()

◆ getFlag()

◆ getRcode()

◆ len()

◆ operator=()

◆ pack()

◆ packDomainName()

◆ RCODE_CLIENT()

◆ RCODE_SERVER()

◆ resetDomainName()

◆ resetFlags()

◆ setDomainName()

◆ setFlag()

◆ setRcode()

◆ toText()

◆ unpack()

Member Data Documentation

◆ FIXED_FIELDS_LEN

◆ FLAG_E

◆ FLAG_MASK

◆ FLAG_N

◆ FLAG_O

◆ FLAG_S