Hardware type that represents information from DHCPv4 packet. More...

#include <hwaddr.h>

Public Member Functions
	HWAddr ()
	default constructor

	HWAddr (const std::vector< uint8_t > &hwaddr, uint16_t htype)
	constructor, based on C++ vector<uint8_t>

	HWAddr (const uint8_t *hwaddr, size_t len, uint16_t htype)
	constructor, based on C-style pointer and length

bool	operator!= (const HWAddr &other) const
	Compares two hardware addresses for inequality.

bool	operator== (const HWAddr &other) const
	Compares two hardware addresses for equality.

std::string	toText (bool include_htype=true) const
	Returns textual representation of a hardware address (e.g.

Static Public Member Functions
static HWAddr	fromText (const std::string &text, const uint16_t htype=HTYPE_ETHER)
	Creates instance of the hardware address from textual format.

Public Attributes
uint16_t	htype_
	Hardware type.

std::vector< uint8_t >	hwaddr_

uint32_t	source_
	Hardware address source.

Static Public Attributes
static const size_t	ETHERNET_HWADDR_LEN = 6
	Size of an ethernet hardware address.

static const uint32_t	HWADDR_SOURCE_ANY = 0xffffffff
	Not really a type, only used in getMAC() calls.

static const uint32_t	HWADDR_SOURCE_CLIENT_ADDR_RELAY_OPTION = 0x00000008
	Get it from RFC6939 option.

static const uint32_t	HWADDR_SOURCE_DOCSIS_CMTS = 0x00000040
	A CMTS (acting as DHCP relay agent) that supports DOCSIS standard can insert DOCSIS options that contain client's MAC address.

static const uint32_t	HWADDR_SOURCE_DOCSIS_MODEM = 0x00000080
	A cable modem (acting as DHCP client) that supports DOCSIS standard can insert DOCSIS options that contain client's MAC address.

static const uint32_t	HWADDR_SOURCE_DUID = 0x00000002
	Extracted from DUID-LL or DUID-LLT (not 100% reliable as the client can send fake DUID).

static const uint32_t	HWADDR_SOURCE_IPV6_LINK_LOCAL = 0x00000004
	Extracted from IPv6 link-local address.

static const uint32_t	HWADDR_SOURCE_RAW = 0x00000001
	Obtained first hand from raw socket (100% reliable).

static const uint32_t	HWADDR_SOURCE_REMOTE_ID = 0x00000010
	A relay can insert remote-id.

static const uint32_t	HWADDR_SOURCE_SUBSCRIBER_ID = 0x00000020
	A relay can insert a subscriber-id option.

static const uint32_t	HWADDR_SOURCE_UNKNOWN = 0x00000000
	Used when actual origin is not known, e.g.

static const size_t	MAX_HWADDR_LEN = 20
	Maximum size of a hardware address.

Detailed Description

Hardware type that represents information from DHCPv4 packet.

Definition at line 20 of file hwaddr.h.

Constructor & Destructor Documentation

◆ HWAddr() [1/3]

isc::dhcp::HWAddr::HWAddr ( )

default constructor

Definition at line 32 of file hwaddr.cc.

Referenced by fromText().

◆ HWAddr() [2/3]

isc::dhcp::HWAddr::HWAddr	(	const uint8_t *	hwaddr,
		size_t	len,
		uint16_t	htype )

constructor, based on C-style pointer and length

Parameters

hwaddr	pointer to hardware address
len	length of the address pointed by hwaddr
htype	hardware type

Definition at line 36 of file hwaddr.cc.

References isc_throw, and MAX_HWADDR_LEN.

◆ HWAddr() [3/3]

isc::dhcp::HWAddr::HWAddr	(	const std::vector< uint8_t > &	hwaddr,
		uint16_t	htype )

constructor, based on C++ vector<uint8_t>

Parameters

hwaddr	const reference to hardware address
htype	hardware type

Definition at line 43 of file hwaddr.cc.

References MAX_HWADDR_LEN.

Member Function Documentation

◆ fromText()

HWAddr isc::dhcp::HWAddr::fromText	(	const std::string &	text,
		const uint16_t	htype = HTYPE_ETHER )

static

Creates instance of the hardware address from textual format.

This function parses HW address specified as text and creates the corresponding HWAddr instance. The hexadecimal digits representing individual bytes of the hardware address should be separated with colons. Typically, two digits per byte are used. However, this function allows for 1 digit per HW address byte. In this case, the digit is prepended with '0' during conversion to binary value.

This function can be used to perform a reverse operation to the HWAddr::toText(false).

The instance created by this function sets HTYPE_ETHER as a hardware type.

Parameters

text	HW address in the textual format.
htype	Hardware type.

Returns: Instance of the HW address created from text.

Definition at line 69 of file hwaddr.cc.

References HWAddr(), and isc::util::str::decodeColonSeparatedHexString().

Referenced by isc::dhcp::Lease::fromElementCommon(), isc::lease_cmds::LeaseCmdsImpl::getParameters(), isc::lease_cmds::LeaseCmdsImpl::leaseGetByHwAddressHandler(), isc::lease_cmds::Lease4Parser::parse(), and isc::lease_cmds::Lease6Parser::parse().

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◆ operator!=()

bool isc::dhcp::HWAddr::operator!= ( const HWAddr & other ) const

Compares two hardware addresses for inequality.

Definition at line 80 of file hwaddr.cc.

◆ operator==()

bool isc::dhcp::HWAddr::operator== ( const HWAddr & other ) const

Compares two hardware addresses for equality.

Definition at line 75 of file hwaddr.cc.

References htype_, and hwaddr_.

◆ toText()

std::string isc::dhcp::HWAddr::toText ( bool include_htype = true ) const

Returns textual representation of a hardware address (e.g.

00:01:02:03:04:05)

Parameters

include_htype Boolean value which controls whether the hardware type is included in the returned string (true), or not (false).

Returns: Hardware address in the textual format.

Definition at line 51 of file hwaddr.cc.

References htype_, and hwaddr_.

Referenced by isc::dhcp::Memfile_LeaseMgr::getLease4(), and isc::dhcp::Memfile_LeaseMgr::getLease4().

Member Data Documentation

◆ ETHERNET_HWADDR_LEN

const size_t isc::dhcp::HWAddr::ETHERNET_HWADDR_LEN = 6

static

Size of an ethernet hardware address.

Definition at line 24 of file hwaddr.h.

Referenced by isc::dhcp::decodeEthernetHeader(), and isc::dhcp::writeEthernetHeader().

◆ htype_

uint16_t isc::dhcp::HWAddr::htype_

Hardware type.

Note: It used to be uint8_t as used in DHCPv4. However, since we're expanding MAC addresses support to DHCPv6 that uses hw_type as 16 bits, we need to be able to store that wider format.

Definition at line 105 of file hwaddr.h.

Referenced by operator==(), and toText().

◆ hwaddr_

std::vector<uint8_t> isc::dhcp::HWAddr::hwaddr_

Definition at line 98 of file hwaddr.h.

Referenced by user_chk::UserRegistry::findUser(), isc::dhcp::Lease::fromElementCommon(), isc::dhcp::CSVLeaseFile4::next(), operator==(), and toText().

◆ MAX_HWADDR_LEN

const size_t isc::dhcp::HWAddr::MAX_HWADDR_LEN = 20

static

Maximum size of a hardware address.

Definition at line 27 of file hwaddr.h.

Referenced by HWAddr(), HWAddr(), isc::dhcp::Host::getIdentifierMaxLength(), and isc::dhcp::Pkt6::getMACFromRemoteIdRelayOption().

◆ source_

uint32_t isc::dhcp::HWAddr::source_

Hardware address source.

This variable specifies how the hardware address was obtained.

Todo: This is a stub implementation. Proper implementation will move constants from Pkt::HWADDR_SOURCE_* here. Currently always initialized to zero.

Definition at line 113 of file hwaddr.h.

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

Public Member Functions

Static Public Member Functions

Public Attributes

Static Public Attributes

Detailed Description

Constructor & Destructor Documentation

◆ HWAddr() [1/3]

◆ HWAddr() [2/3]

◆ HWAddr() [3/3]

Member Function Documentation

◆ fromText()

◆ operator!=()

◆ operator==()

◆ toText()

Member Data Documentation

◆ ETHERNET_HWADDR_LEN

◆ htype_

◆ hwaddr_

◆ MAX_HWADDR_LEN

◆ source_