A thread safe singleton handler of the HCI control channel to one controller (BT adapter) More...

#include <HCIHandler.hpp>

Collaboration diagram for direct_bt::HCIHandler:

Public Types
enum	DefaultsSizeT : jau::nsize_t { HCI_MAX_MTU = static_cast<jau::nsize_t>(HCIConstSizeT::PACKET_MAX_SIZE) }

Public Member Functions
	HCIHandler (const uint16_t dev_id, const BTMode btMode=BTMode::NONE) noexcept

	HCIHandler (const HCIHandler &)=delete

void	operator= (const HCIHandler &)=delete

	~HCIHandler () noexcept
	Releases this instance after issuing close(). More...

void	close () noexcept

BTMode	getBTMode () const noexcept

void	setBTMode (const BTMode mode) noexcept

bool	isOpen () const noexcept
	Returns true if this mgmt instance is open, connected and hence valid, otherwise false. More...

bool	use_ext_scan () const noexcept
	Use extended scanning if HCI_LE_Set_Extended_Scan_Parameters and HCI_LE_Set_Extended_Scan_Enable is supported (Bluetooth 5.0). More...

bool	use_ext_conn () const noexcept
	Use extended connection if HCI_LE_Extended_Create_Connection is supported (Bluetooth 5.0). More...

ScanType	getCurrentScanType () const noexcept

void	setCurrentScanType (const ScanType v) noexcept

std::string	toString () const noexcept

HCIStatusCode	startAdapter ()
	Bring up this adapter into a POWERED functional state. More...

HCIStatusCode	stopAdapter ()
	Bring down this adapter into a non-POWERED non-functional state. More...

HCIStatusCode	resetAdapter ()
	Reset the adapter. More...

HCIStatusCode	reset () noexcept
	HCI Reset Command. More...

HCIStatusCode	getLocalVersion (HCILocalVersion &version) noexcept

HCIStatusCode	le_read_local_features (LE_Features &res) noexcept
	Request and return LE_Features for the controller. More...

HCIStatusCode	le_set_scan_param (const bool le_scan_active=false, const HCILEOwnAddressType own_mac_type=HCILEOwnAddressType::PUBLIC, const uint16_t le_scan_interval=24, const uint16_t le_scan_window=24, const uint8_t filter_policy=0x00) noexcept
	Sets LE scanning parameters. More...

HCIStatusCode	le_enable_scan (const bool enable, const bool filter_dup=true) noexcept
	Starts or stops LE scanning. More...

HCIStatusCode	le_start_scan (const bool filter_dup=true, const bool le_scan_active=false, const HCILEOwnAddressType own_mac_type=HCILEOwnAddressType::PUBLIC, const uint16_t le_scan_interval=24, const uint16_t le_scan_window=24, const uint8_t filter_policy=0x00) noexcept
	Start LE scanning, i.e. More...

HCIStatusCode	le_create_conn (const EUI48 &peer_bdaddr, const HCILEPeerAddressType peer_mac_type=HCILEPeerAddressType::PUBLIC, const HCILEOwnAddressType own_mac_type=HCILEOwnAddressType::PUBLIC, const uint16_t le_scan_interval=24, const uint16_t le_scan_window=24, const uint16_t conn_interval_min=12, const uint16_t conn_interval_max=12, const uint16_t conn_latency=0, const uint16_t supervision_timeout=getHCIConnSupervisorTimeout(0, 15)) noexcept
	Establish a connection to the given LE peer. More...

HCIStatusCode	create_conn (const EUI48 &bdaddr, const uint16_t pkt_type=HCI_DM1\|HCI_DM3\|HCI_DM5\|HCI_DH1\|HCI_DH3\|HCI_DH5, const uint16_t clock_offset=0x0000, const uint8_t role_switch=0x01) noexcept
	Establish a connection to the given BREDR (non LE). More...

HCIStatusCode	disconnect (const uint16_t conn_handle, const BDAddressAndType &addressAndType, const HCIStatusCode reason=HCIStatusCode::REMOTE_USER_TERMINATED_CONNECTION) noexcept
	Disconnect an established connection. More...

HCIStatusCode	le_read_phy (const uint16_t conn_handle, const BDAddressAndType &addressAndType, LE_PHYs &resRx, LE_PHYs &resTx) noexcept
	Request and return LE_PHYs bit for the given connection. More...

void	resetAllStates (const bool powered_on) noexcept
	Reset all internal states, i.e. More...

bool	addMgmtEventCallback (const MgmtEvent::Opcode opc, const MgmtEventCallback &cb) noexcept
	MgmtEventCallback handling More...

int	removeMgmtEventCallback (const MgmtEvent::Opcode opc, const MgmtEventCallback &cb) noexcept
	Returns count of removed given MgmtEventCallback from the named MgmtEvent::Opcode list. More...

void	clearMgmtEventCallbacks (const MgmtEvent::Opcode opc) noexcept
	Removes all MgmtEventCallbacks from the to the named MgmtEvent::Opcode list. More...

void	addSMPMsgCallback (const HCISMPMsgCallback &l)

int	removeSMPMsgCallback (const HCISMPMsgCallback &l)

void	clearAllCallbacks () noexcept
	Removes all MgmtEventCallbacks from all MgmtEvent::Opcode lists and all SMPSecurityReqCallbacks. More...

void	sendMgmtEvent (const MgmtEvent &event) noexcept
	Manually send a MgmtEvent to all of its listeners. More...

Public Attributes
const HCIEnv &	env

Static Public Attributes
static const pid_t	pidSelf = getpid()

Detailed Description

A thread safe singleton handler of the HCI control channel to one controller (BT adapter)

Implementation utilizes a lock free ringbuffer receiving data within its separate thread.

Controlling Environment variables, see HCIEnv.

Definition at line 171 of file HCIHandler.hpp.

Member Enumeration Documentation

◆ DefaultsSizeT

enum direct_bt::HCIHandler::DefaultsSizeT : jau::nsize_t

Enumerator
HCI_MAX_MTU

Definition at line 173 of file HCIHandler.hpp.

Constructor & Destructor Documentation

◆ HCIHandler() [1/2]

HCIHandler::HCIHandler	(	const uint16_t	dev_id,
		const BTMode	btMode = `BTMode::NONE`
	)

noexcept

Definition at line 592 of file HCIHandler.cpp.

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◆ HCIHandler() [2/2]

direct_bt::HCIHandler::HCIHandler ( const HCIHandler & )

delete

◆ ~HCIHandler()

direct_bt::HCIHandler::~HCIHandler ( )

inlinenoexcept

Releases this instance after issuing close().

Definition at line 365 of file HCIHandler.hpp.

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Member Function Documentation

◆ addMgmtEventCallback()

bool HCIHandler::addMgmtEventCallback	(	const MgmtEvent::Opcode	opc,
		const MgmtEventCallback &	cb
	)

noexcept

MgmtEventCallback handling

Appends the given MgmtEventCallback to the named MgmtEvent::Opcode list, if it is not present already (opcode + callback).

Parameters

opc	opcode index for callback list, the callback shall be added to
cb	the to be added callback

Returns: true if newly added or already existing, false if given MgmtEvent::Opcode is out of supported range.

Definition at line 1558 of file HCIHandler.cpp.

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◆ addSMPMsgCallback()

void HCIHandler::addSMPMsgCallback ( const HCISMPMsgCallback & l )

Definition at line 1597 of file HCIHandler.cpp.

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◆ clearAllCallbacks()

void HCIHandler::clearAllCallbacks ( )

noexcept

Removes all MgmtEventCallbacks from all MgmtEvent::Opcode lists and all SMPSecurityReqCallbacks.

Definition at line 1582 of file HCIHandler.cpp.

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◆ clearMgmtEventCallbacks()

void HCIHandler::clearMgmtEventCallbacks ( const MgmtEvent::Opcode opc )

noexcept

Removes all MgmtEventCallbacks from the to the named MgmtEvent::Opcode list.

Definition at line 1575 of file HCIHandler.cpp.

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◆ close()

void HCIHandler::close ( )

noexcept

Definition at line 766 of file HCIHandler.cpp.

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◆ create_conn()

HCIStatusCode HCIHandler::create_conn	(	const EUI48 &	bdaddr,
		const uint16_t	pkt_type = `HCI_DM1 \| HCI_DM3 \| HCI_DM5 \| HCI_DH1 \| HCI_DH3 \| HCI_DH5`,
		const uint16_t	clock_offset = `0x0000`,
		const uint8_t	role_switch = `0x01`
	)

noexcept

Establish a connection to the given BREDR (non LE).

BT Core Spec v5.2: Vol 4, Part E HCI: 7.1.5 Create Connection command

<p<blockquote>

Implementation tries to mitigate HCIStatusCode::COMMAND_DISALLOWED failure due to any pending connection commands, waiting actively up to HCIEnv::HCI_COMMAND_COMPLETE_REPLY_TIMEOUT, testing every HCIEnv::HCI_COMMAND_POLL_PERIOD if resolved.

In case of no resolution, i.e. another HCI_Create_Connection command is pending, HCIStatusCode::COMMAND_DISALLOWED will be returned by the underlying HCI host implementation.

Implementation tries to mitigate HCIStatusCode::CONNECTION_ALREADY_EXISTS failure due to a specific pending disconnect command, waiting actively up to HCIEnv::HCI_COMMAND_COMPLETE_REPLY_TIMEOUT, testing every HCIEnv::HCI_COMMAND_POLL_PERIOD if resolved.

In case of no resolution, i.e. the connection persists, HCIStatusCode::CONNECTION_ALREADY_EXISTS will be returned by the underlying HCI host implementation.

Definition at line 1203 of file HCIHandler.cpp.

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◆ disconnect()

HCIStatusCode HCIHandler::disconnect	(	const uint16_t	conn_handle,
		const BDAddressAndType &	addressAndType,
		const HCIStatusCode	reason = `HCIStatusCode::REMOTE_USER_TERMINATED_CONNECTION`
	)

noexcept

Disconnect an established connection.

BT Core Spec v5.2: Vol 4, Part E HCI: 7.1.6 Disconnect command

Definition at line 1275 of file HCIHandler.cpp.

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◆ getBTMode()

BTMode direct_bt::HCIHandler::getBTMode ( ) const

inlinenoexcept

Definition at line 369 of file HCIHandler.hpp.

◆ getCurrentScanType()

ScanType direct_bt::HCIHandler::getCurrentScanType ( ) const

inlinenoexcept

Definition at line 389 of file HCIHandler.hpp.

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◆ getLocalVersion()

HCIStatusCode HCIHandler::getLocalVersion ( HCILocalVersion & version )

noexcept

Definition at line 904 of file HCIHandler.cpp.

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◆ isOpen()

bool direct_bt::HCIHandler::isOpen ( ) const

inlinenoexcept

Returns true if this mgmt instance is open, connected and hence valid, otherwise false.

Definition at line 374 of file HCIHandler.hpp.

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◆ le_create_conn()

HCIStatusCode HCIHandler::le_create_conn	(	const EUI48 &	peer_bdaddr,
		const HCILEPeerAddressType	peer_mac_type = `HCILEPeerAddressType::PUBLIC`,
		const HCILEOwnAddressType	own_mac_type = `HCILEOwnAddressType::PUBLIC`,
		const uint16_t	le_scan_interval = `24`,
		const uint16_t	le_scan_window = `24`,
		const uint16_t	conn_interval_min = `12`,
		const uint16_t	conn_interval_max = `12`,
		const uint16_t	conn_latency = `0`,
		const uint16_t	supervision_timeout = `getHCIConnSupervisorTimeout(0, 15)`
	)

noexcept

Establish a connection to the given LE peer.

BT Core Spec v5.2: Vol 4, Part E HCI: 7.8.66 LE Extended Create Connection command (Bluetooth 5.0)

if available, otherwise using

BT Core Spec v5.2: Vol 4, Part E HCI: 7.8.12 LE Create Connection command

<p<blockquote>

Set window to the same value as the interval, enables continuous scanning.

The supervising timeout period is the time it takes before a devices gives up on the link if no packets are received. Hence this parameter influences the responsiveness on a link loss. A too small number may render the link too unstable, it should be at least 6 times of the connection interval.
To detect a link loss one can also send a regular ping to check whether the peripheral is still responding, see BTGattHandler::ping().

Implementation tries to mitigate HCIStatusCode::COMMAND_DISALLOWED failure due to any pending connection commands, waiting actively up to HCIEnv::HCI_COMMAND_COMPLETE_REPLY_TIMEOUT, testing every HCIEnv::HCI_COMMAND_POLL_PERIOD if resolved.

In case of no resolution, i.e. another HCI_LE_Create_Connection command is pending, HCIStatusCode::COMMAND_DISALLOWED will be returned by the underlying HCI host implementation.

Implementation tries to mitigate HCIStatusCode::CONNECTION_ALREADY_EXISTS failure due to a specific pending disconnect command, waiting actively up to HCIEnv::HCI_COMMAND_COMPLETE_REPLY_TIMEOUT, testing every HCIEnv::HCI_COMMAND_POLL_PERIOD if resolved.

In case of no resolution, i.e. the connection persists, HCIStatusCode::CONNECTION_ALREADY_EXISTS will be returned by the underlying HCI host implementation.

Parameters

peer_bdaddr
peer_mac_type
own_mac_type
le_scan_interval	in units of 0.625ms, default value 24 for 15ms; Value range [4 .. 0x4000] for [2.5ms .. 10.24s]
le_scan_window	in units of 0.625ms, default value 24 for 15ms; Value range [4 .. 0x4000] for [2.5ms .. 10.24s]. Shall be <= le_scan_interval
conn_interval_min	in units of 1.25ms, default value 12 for 15ms; Value range [6 .. 3200] for [7.5ms .. 4000ms]
conn_interval_max	in units of 1.25ms, default value 12 for 15ms; Value range [6 .. 3200] for [7.5ms .. 4000ms]
conn_latency	slave latency in units of connection events, default value 0; Value range [0 .. 0x01F3].
supervision_timeout	in units of 10ms, default value >= 10 x conn_interval_max, we use HCIConstInt::LE_CONN_MIN_TIMEOUT_MS minimum; Value range [0xA-0x0C80] for [100ms - 32s].

Returns

Definition at line 1074 of file HCIHandler.cpp.

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◆ le_enable_scan()

HCIStatusCode HCIHandler::le_enable_scan	(	const bool	enable,
		const bool	filter_dup = `true`
	)

noexcept

Starts or stops LE scanning.

BT Core Spec v5.2: Vol 4 HCI, Part E HCI Functional: 7.8.65 LE Set Extended Scan Enable command (Bluetooth 5.0)

if available, otherwise using

BT Core Spec v5.2: Vol 4, Part E HCI: 7.8.11 LE Set Scan Enable command

Parameters

enable	true to enable discovery, otherwise false
filter_dup	true to filter out duplicate AD PDUs (default), otherwise all will be reported.

Definition at line 1001 of file HCIHandler.cpp.

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◆ le_read_local_features()

HCIStatusCode HCIHandler::le_read_local_features ( LE_Features & res )

noexcept

Request and return LE_Features for the controller.

BT Core Spec v5.2: Vol 6, Part B, 4.6 (LE LL) Feature Support

BT Core Spec v5.2: Vol 4, Part E, 7.8.3 LE Read Local Supported Features command

Parameters

res	reference for the resulting LE_Features

Returns: HCIStatusCode

Definition at line 927 of file HCIHandler.cpp.

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◆ le_read_phy()

HCIStatusCode HCIHandler::le_read_phy	(	const uint16_t	conn_handle,
		const BDAddressAndType &	addressAndType,
		LE_PHYs &	resRx,
		LE_PHYs &	resTx
	)

noexcept

Request and return LE_PHYs bit for the given connection.

BT Core Spec v5.2: Vol 4, Part E, 7.8.47 LE Read PHY command (we transfer the sequential value to this bitmask for unification)

Parameters

conn_handle
addressAndType
resRx	reference for the resulting receiver LE_PHYs bit
resTx	reference for the resulting transmitter LE_PHYs bit

Returns: HCIStatusCode

Definition at line 1327 of file HCIHandler.cpp.

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◆ le_set_scan_param()

HCIStatusCode HCIHandler::le_set_scan_param	(	const bool	le_scan_active = `false`,
		const HCILEOwnAddressType	own_mac_type = `HCILEOwnAddressType::PUBLIC`,
		const uint16_t	le_scan_interval = `24`,
		const uint16_t	le_scan_window = `24`,
		const uint8_t	filter_policy = `0x00`
	)

noexcept

Sets LE scanning parameters.

BT Core Spec v5.2: Vol 4 HCI, Part E HCI Functional: 7.8.64 LE Set Extended Scan Parameters command (Bluetooth 5.0)

if available, otherwise using

BT Core Spec v5.2: Vol 4 HCI, Part E HCI Functional: 7.8.10 LE Set Scan Parameters command

BT Core Spec v5.2: Vol 6 LE, Part B Link Layer: 4.4.3 Scanning State

<p<blockquote>

Scan parameters control advertising (AD) Protocol Data Unit (PDU) delivery behavior.

Should not be called while LE scanning is active, otherwise HCIStatusCode::COMMAND_DISALLOWED will be returned.

Parameters

le_scan_active	true enables delivery of active scanning PDUs, otherwise no scanning PDUs shall be sent (default)
own_mac_type	HCILEOwnAddressType::PUBLIC (default) or random/private.
le_scan_interval	in units of 0.625ms, default value 24 for 15ms; Value range [4 .. 0x4000] for [2.5ms .. 10.24s]
le_scan_window	in units of 0.625ms, default value 24 for 15ms; Value range [4 .. 0x4000] for [2.5ms .. 10.24s]. Shall be <= le_scan_interval
filter_policy	0x00 accepts all PDUs (default), 0x01 only of whitelisted, ...

Definition at line 946 of file HCIHandler.cpp.

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◆ le_start_scan()

HCIStatusCode HCIHandler::le_start_scan	(	const bool	filter_dup = `true`,
		const bool	le_scan_active = `false`,
		const HCILEOwnAddressType	own_mac_type = `HCILEOwnAddressType::PUBLIC`,
		const uint16_t	le_scan_interval = `24`,
		const uint16_t	le_scan_window = `24`,
		const uint8_t	filter_policy = `0x00`
	)

noexcept

Start LE scanning, i.e.

performs le_set_scan_param() and le_enable_scan() in one atomic operation.

BT Core Spec v5.2: Vol 4 HCI, Part E HCI Functional: 7.8.64 LE Set Extended Scan Parameters command (Bluetooth 5.0)
BT Core Spec v5.2: Vol 4 HCI, Part E HCI Functional: 7.8.10 LE Set Scan Parameters command
BT Core Spec v5.2: Vol 4 HCI, Part E HCI Functional: 7.8.65 LE Set Extended Scan Enable command (Bluetooth 5.0)
BT Core Spec v5.2: Vol 4, Part E HCI: 7.8.11 LE Set Scan Enable command

<p<blockquote>

Scan parameters control advertising (AD) Protocol Data Unit (PDU) delivery behavior.

Should not be called while LE scanning is active, otherwise HCIStatusCode::COMMAND_DISALLOWED will be returned.

Method will report errors.

Parameters

filter_dup	true to filter out duplicate AD PDUs (default), otherwise all will be reported.
le_scan_active	true enables delivery of active scanning PDUs, otherwise no scanning PDUs shall be sent (default)
own_mac_type	HCILEOwnAddressType::PUBLIC (default) or random/private.
le_scan_interval	in units of 0.625ms, default value 24 for 15ms; Value range [4 .. 0x4000] for [2.5ms .. 10.24s]
le_scan_window	in units of 0.625ms, default value 24 for 15ms; Value range [4 .. 0x4000] for [2.5ms .. 10.24s]. Shall be <= le_scan_interval
filter_policy	0x00 accepts all PDUs (default), 0x01 only of whitelisted, ...

See also: le_read_local_features()

Definition at line 1045 of file HCIHandler.cpp.

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◆ operator=()

void direct_bt::HCIHandler::operator= ( const HCIHandler & )

delete

◆ removeMgmtEventCallback()

int HCIHandler::removeMgmtEventCallback	(	const MgmtEvent::Opcode	opc,
		const MgmtEventCallback &	cb
	)

noexcept

Returns count of removed given MgmtEventCallback from the named MgmtEvent::Opcode list.

Definition at line 1567 of file HCIHandler.cpp.

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◆ removeSMPMsgCallback()

int HCIHandler::removeSMPMsgCallback ( const HCISMPMsgCallback & l )

Definition at line 1600 of file HCIHandler.cpp.

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◆ reset()

HCIStatusCode HCIHandler::reset ( )

noexcept

HCI Reset Command.

BT Core Spec v5.2: Vol 4, Part E HCI: 7.3.2 Reset command

Definition at line 884 of file HCIHandler.cpp.

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◆ resetAdapter()

HCIStatusCode HCIHandler::resetAdapter ( )

Reset the adapter.

The semantics are specific to the HCI host implementation, however, it shall comply at least with the HCI Reset command and bring up the device from standby into a POWERED functional state afterwards.

BT Core Spec v5.2: Vol 4, Part E HCI: 7.3.2 Reset command

Definition at line 868 of file HCIHandler.cpp.

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◆ resetAllStates()

void HCIHandler::resetAllStates ( const bool powered_on )

noexcept

Reset all internal states, i.e.

connection and disconnect lists.

Parameters

powered_on indicates whether the adapter is powered on or not

Definition at line 168 of file HCIHandler.cpp.

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◆ sendMgmtEvent()

void HCIHandler::sendMgmtEvent ( const MgmtEvent & event )

noexcept

Manually send a MgmtEvent to all of its listeners.

Definition at line 496 of file HCIHandler.cpp.

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◆ setBTMode()

void direct_bt::HCIHandler::setBTMode ( const BTMode mode )

inlinenoexcept

Definition at line 371 of file HCIHandler.hpp.

◆ setCurrentScanType()

void direct_bt::HCIHandler::setCurrentScanType ( const ScanType v )

inlinenoexcept

Definition at line 390 of file HCIHandler.hpp.

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◆ startAdapter()

HCIStatusCode HCIHandler::startAdapter ( )

Bring up this adapter into a POWERED functional state.

Definition at line 821 of file HCIHandler.cpp.

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◆ stopAdapter()

HCIStatusCode HCIHandler::stopAdapter ( )

Bring down this adapter into a non-POWERED non-functional state.

All allocated resources should be freed and the internal state being reset in compliance to

BT Core Spec v5.2: Vol 4, Part E HCI: 7.3.2 Reset command

Definition at line 843 of file HCIHandler.cpp.

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◆ toString()

std::string HCIHandler::toString ( ) const

noexcept

Definition at line 814 of file HCIHandler.cpp.

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◆ use_ext_conn()

bool direct_bt::HCIHandler::use_ext_conn ( ) const

inlinenoexcept

Use extended connection if HCI_LE_Extended_Create_Connection is supported (Bluetooth 5.0).

Definition at line 385 of file HCIHandler.hpp.

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◆ use_ext_scan()

bool direct_bt::HCIHandler::use_ext_scan ( ) const

inlinenoexcept

Use extended scanning if HCI_LE_Set_Extended_Scan_Parameters and HCI_LE_Set_Extended_Scan_Enable is supported (Bluetooth 5.0).

Definition at line 379 of file HCIHandler.hpp.

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Member Data Documentation

◆ env

const HCIEnv& direct_bt::HCIHandler::env

Definition at line 179 of file HCIHandler.hpp.

◆ pidSelf

const pid_t HCIHandler::pidSelf = getpid()

static

Definition at line 177 of file HCIHandler.hpp.

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

/usr/local/projects/direct_bt/api/direct_bt/HCIHandler.hpp
/usr/local/projects/direct_bt/src/direct_bt/HCIHandler.cpp

Public Types

Public Member Functions

Public Attributes

Static Public Attributes

Detailed Description

Member Enumeration Documentation

◆ DefaultsSizeT

Constructor & Destructor Documentation

◆ HCIHandler() [1/2]

◆ HCIHandler() [2/2]

◆ ~HCIHandler()

Member Function Documentation

◆ addMgmtEventCallback()

◆ addSMPMsgCallback()

◆ clearAllCallbacks()

◆ clearMgmtEventCallbacks()

◆ close()

◆ create_conn()

◆ disconnect()

◆ getBTMode()

◆ getCurrentScanType()

◆ getLocalVersion()

◆ isOpen()

◆ le_create_conn()

◆ le_enable_scan()

◆ le_read_local_features()

◆ le_read_phy()

◆ le_set_scan_param()

◆ le_start_scan()

◆ operator=()

◆ removeMgmtEventCallback()

◆ removeSMPMsgCallback()

◆ reset()

◆ resetAdapter()

◆ resetAllStates()

◆ sendMgmtEvent()

◆ setBTMode()

◆ setCurrentScanType()

◆ startAdapter()

◆ stopAdapter()

◆ toString()

◆ use_ext_conn()

◆ use_ext_scan()

Member Data Documentation

◆ env

◆ pidSelf