Vol 3, Part H: 3.5.4 Pairing Random message. More...

#include <SMPTypes.hpp>

Inheritance diagram for direct_bt::SMPPairRandMsg:

Collaboration diagram for direct_bt::SMPPairRandMsg:

Public Member Functions
	SMPPairRandMsg (const jau::uint128dp_t &random_value)

	SMPPairRandMsg (const uint8_t *source, const jau::nsize_t length)

constexpr_cxx20 jau::nsize_t	getDataSize () const noexcept override
	Returns the required data size according to the specified packet, which should be within 0-22 or 64 octets. More...

std::string	getName () const noexcept override

constexpr jau::uint128dp_t	getRand () const noexcept
	Returns the 128-bit Random value (16 octets) More...

Public Member Functions inherited from direct_bt::SMPEncKeyByteStream
	SMPEncKeyByteStream (const Opcode opc, const jau::nsize_t size)
	Persistent memory, w/ ownership . More...

	SMPEncKeyByteStream (const uint8_t *source, const jau::nsize_t size)
	Persistent memory, w/ ownership . More...

	~SMPEncKeyByteStream () noexcept override=default

Public Member Functions inherited from direct_bt::SMPPDUMsg
	SMPPDUMsg (const Opcode opc, const jau::nsize_t size)
	Persistent memory, w/ ownership . More...

	SMPPDUMsg (const uint8_t *source, const jau::nsize_t size)
	Persistent memory, w/ ownership . More...

	SMPPDUMsg (const uint8_t *source, const jau::nsize_t size, const jau::nsize_t min_size)
	Persistent memory, w/ ownership . More...

virtual	~SMPPDUMsg () noexcept=default

constexpr jau::nsize_t	getDataOffset () const noexcept
	Returns the octet offset to the data segment in this PDU including the mandatory opcode, i.e. More...

virtual constexpr_cxx20 jau::nsize_t	getDataSize () const noexcept
	Returns the required data size according to the specified packet, which should be within 0-22 or 64 octets. More...

virtual std::string	getName () const noexcept

constexpr Opcode	getOpcode () const noexcept
	SMP Command Codes Vol 3, Part H (SM): 3.3. More...

constexpr jau::nsize_t	getPDUParamSize () const noexcept
	Returns the actual PDU size less one octet for the opcode, which should result in 0-22 octets or 64 octets. More...

constexpr uint64_t	getTimestamp () const noexcept

virtual std::string	toString () const noexcept

Protected Member Functions
std::string	valueString () const noexcept override

Protected Member Functions inherited from direct_bt::SMPPDUMsg
virtual std::string	baseString () const noexcept

void	check_range ()

void	checkOpcode (const Opcode exp1, const Opcode exp2) const

void	checkOpcode (const Opcode expected) const

virtual std::string	valueString () const noexcept

Additional Inherited Members
Public Types inherited from direct_bt::SMPPDUMsg
enum class	Opcode : uint8_t { UNDEFINED = 0x00 , PAIRING_REQUEST = 0x01 , PAIRING_RESPONSE = 0x02 , PAIRING_CONFIRM = 0x03 , PAIRING_RANDOM = 0x04 , PAIRING_FAILED = 0x05 , ENCRYPTION_INFORMATION = 0x06 , MASTER_IDENTIFICATION = 0x07 , IDENTITY_INFORMATION = 0x08 , IDENTITY_ADDRESS_INFORMATION = 0x09 , SIGNING_INFORMATION = 0x0A , SECURITY_REQUEST = 0x0B , PAIRING_PUBLIC_KEY = 0x0C , PAIRING_DHKEY_CHECK = 0x0D , PAIRING_KEYPRESS_NOTIFICATION = 0x0E }
	SMP Command Codes Vol 3, Part H (SM): 3.3. More...

Static Public Member Functions inherited from direct_bt::SMPPDUMsg
template<class T >
static T *	clone (const T &source) noexcept
	Clone template for convenience, based on derived class's copy-constructor. More...

static std::string	getOpcodeString (const Opcode opc) noexcept

static std::unique_ptr< const SMPPDUMsg >	getSpecialized (const uint8_t *buffer, jau::nsize_t const buffer_size) noexcept
	Return a newly created specialized instance pointer to base class. More...

static constexpr uint8_t	number (const Opcode rhs) noexcept

Protected Attributes inherited from direct_bt::SMPPDUMsg
jau::POctets	pdu
	actual received PDU More...

uint64_t	ts_creation
	creation timestamp in milliseconds More...

Detailed Description

Vol 3, Part H: 3.5.4 Pairing Random message.

Vol 3 (Host), Part H (SM): 3 (SMP), 3.5 Pairing Methods

Opcode::PAIRING_RANDOM

[uint8_t opcode]
jau::uint128_t random_value

Used by the initiating and responding device to send the random number used to calculate the Confirm value sent in the Pairing Confirm command.

The initiating device sends a Pairing Random command after it has received a Pairing Confirm command from the responding device.

LE legacy pairing: Responding device sends a Pairing Random command after receiving a Pairing Random command from the initiating device if the Confirm value calculated on the responding device matches the Confirm value received from the initiating device.
If the calculated Confirm value does not match then the responding device shall respond with the Pairing Failed command.

LE Secure Connections: Responding device sends a Pairing Random command after it has received a Pairing Random command from the initiating device if the Confirm value calculated on the responding device matches the Confirm value received from the initiating device(?).
If the calculated Confirm value does not match then the responding device shall respond with the Pairing Failed command.

The initiating device shall encrypt the link using the generated key (STK in LE legacy pairing or LTK in LE Secure Connections) if the Confirm value calculated on the initiating device matches the Confirm value received from the responding device.
The successful encryption or re-encryption of the link is the signal to the responding device that key generation has completed successfully.
If the calculated Confirm value does not match then the initiating device shall respond with the Pairing Failed command.

Notable: No endian wise conversion shall occur on this data, since the encryption values are interpreted as little-endian or as a byte stream.

Definition at line 1343 of file SMPTypes.hpp.

Constructor & Destructor Documentation

◆ SMPPairRandMsg() [1/2]

direct_bt::SMPPairRandMsg::SMPPairRandMsg	(	const uint8_t *	source,
		const jau::nsize_t	length
	)

inline

Definition at line 1346 of file SMPTypes.hpp.

◆ SMPPairRandMsg() [2/2]

direct_bt::SMPPairRandMsg::SMPPairRandMsg ( const jau::uint128dp_t & random_value )

inline

Definition at line 1353 of file SMPTypes.hpp.

Member Function Documentation

◆ getDataSize()

constexpr_cxx20 jau::nsize_t direct_bt::SMPPairRandMsg::getDataSize ( ) const

inlineoverridevirtualnoexcept

Returns the required data size according to the specified packet, which should be within 0-22 or 64 octets.

See also: SMPPDUMsg::getPDUParamSize()

Reimplemented from direct_bt::SMPPDUMsg.

Definition at line 1360 of file SMPTypes.hpp.

◆ getRand()

constexpr jau::uint128dp_t direct_bt::SMPPairRandMsg::getRand ( ) const

inlineconstexprnoexcept

Returns the 128-bit Random value (16 octets)

In LE legacy pairing, the initiating device sends Mrand and the responding device sends Srand as defined in Vol 3, Part H, 2.3.5.5 SM - Pairing algo - LE legacy pairing phase 2

In LE Secure Connections, the initiating device sends Na and the responding device sends Nb.

Definition at line 1376 of file SMPTypes.hpp.

◆ getName()

std::string direct_bt::SMPPairRandMsg::getName ( ) const

inlineoverridevirtualnoexcept

Reimplemented from direct_bt::SMPPDUMsg.

Definition at line 1378 of file SMPTypes.hpp.

◆ valueString()

std::string direct_bt::SMPPairRandMsg::valueString ( ) const

inlineoverrideprotectedvirtualnoexcept

Reimplemented from direct_bt::SMPPDUMsg.

Definition at line 1383 of file SMPTypes.hpp.

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

api/direct_bt/SMPTypes.hpp

Public Member Functions

Protected Member Functions

Additional Inherited Members

Detailed Description

Constructor & Destructor Documentation

◆ SMPPairRandMsg() [1/2]

◆ SMPPairRandMsg() [2/2]

Member Function Documentation

◆ getDataSize()

◆ getRand()

◆ getName()

◆ valueString()