Bluetooth Management API
*************************

Copyright (C) 2008-2009  Marcel Holtmann <marcel@holtmann.org>


Overview
========

This document describes the format of data used for communicating with
the kernel using a so-called Bluetooth Management sockets. These sockets
are available starting with Linux kernel version 3.4

The following kernel versions introduced new commands, new events or
important fixes to the Bluetooth Management API:

Linux kernel v3.4	Version 1.0
Linux kernel v3.5	Version 1.1
Linux kernel v3.7	Version 1.2
Linux kernel v3.9	Version 1.3
Linux kernel v3.13	Version 1.4
Linux kernel v3.15	Version 1.5	(not yet released)

Version 1.1 introduces Set Device ID command.

Version 1.2 introduces Passkey Notify event.

Version 1.3 does not introduce any new command or event.

Version 1.4 introduces Set Advertising, Set BR/EDR, Set Static Address
and Set Scan Parameters commands.

Version 1.5 introduces Set Secure Connections, Set Debug Keys, Set Privacy
and Load Identity Resolving Keys commands. It also introduces New Identity
Resolving Key and New Signature Resolving Key events.


Example
=======

The Bluetooth management sockets can be created by setting the hci_channel
member of struct sockaddr_hci to HCI_CHANNEL_CONTROL (3) when creating a
raw HCI socket. In C the needed code would look something like the following:

int mgmt_create(void)
{
	struct sockaddr_hci addr;
	int fd;

	fd = socket(PF_BLUETOOTH, SOCK_RAW | SOCK_CLOEXEC | SOCK_NONBLOCK,
                                                                BTPROTO_HCI);
	if (fd < 0)
		return -errno;

	memset(&addr, 0, sizeof(addr));
	addr.hci_family = AF_BLUETOOTH;
	addr.hci_dev = HCI_DEV_NONE;
	addr.hci_channel = HCI_CHANNEL_CONTROL;

	if (bind(fd, (struct sockaddr *) &addr, sizeof(addr)) < 0) {
		int err = -errno;
		close(fd);
		return err;
	}

	return fd;
}

The process creating the mgmt socket is required to have the
CAP_NET_ADMIN capability (e.g. root would have this).


Packet Structures
=================

	Commands:

	0    4    8   12   16   22   24   28   31   35   39   43   47
	+-------------------+-------------------+-------------------+
	|  Command Code     |  Controller Index |  Parameter Length |
	+-------------------+-------------------+-------------------+
	|                                                           |

	Events:

	0    4    8   12   16   22   24   28   31   35   39   43   47
	+-------------------+-------------------+-------------------+
	|  Event Code       |  Controller Index |  Parameter Length |
	+-------------------+-------------------+-------------------+
	|                                                           |

All fields are in little-endian byte order (least significant byte first).

Controller Index can have a special value <non-controller> to indicate that
command or event is not related to any controller. Possible values:

	<controller id>		0x0000 to 0xFFFE
	<non-controller>	0xFFFF


Error Codes
===========

The following values have been defined for use with the Command Status
and Command Complete events:

0x00	Success
0x01	Unknown Command
0x02	Not Connected
0x03	Failed
0x04	Connect Failed
0x05	Authentication Failed
0x06	Not Paired
0x07	No Resources
0x08	Timeout
0x09	Already Connected
0x0A	Busy
0x0B	Rejected
0x0C	Not Supported
0x0D	Invalid Parameters
0x0E	Disconnected
0x0F	Not Powered
0x10	Cancelled
0x11	Invalid Index


Read Management Version Information Command
===========================================

	Command Code:		0x0001
	Controller Index:	<non-controller>
	Command Parameters:
	Return Parameters:	Version (1 Octets)
				Revision (2 Octets)

	This command returns the Management version and revision.
	Besides, being informational the information can be used to
	determine whether certain behavior has changed or bugs fixed
	when interacting with the kernel.

	This command generates a Command Complete event on success or
	a Command Status event on failure.


Read Management Supported Commands Command
==========================================

	Command Code:		0x0002
	Controller Index:	<non-controller>
	Command Parameters:
	Return Parameters:	Num_Of_Commands (2 Octets)
				Num_Of_Events (2 Octets)
				Command1 (2 Octets)
				Command2 (2 Octets)
				...
				Event1 (2 Octets)
				Event2 (2 Octets)
				...

	This command returns the list of supported Management commands
	and events.

	The commands Read Management Version Information and Read
	management Supported Commands are not included in this list.
	Both commands are always supported and mandatory.

	The events Command Status and Command Complete are not included
	in this list. Both are implicit and mandatory.

	This command generates a Command Complete event on success or
	a Command Status event on failure.


Read Controller Index List Command
==================================

	Command Code:		0x0003
	Controller Index:	<non-controller>
	Command Parameters:
	Return Parameters:	Num_Controllers (2 Octets)
				Controller_Index[i] (2 Octets)

	This command returns the list of currently known controllers.
	Controllers added or removed after calling this command can be
	monitored using the Index Added and Index Removed events.

	This command generates a Command Complete event on success or
	a Command Status event on failure.


Read Controller Information Command
===================================

	Command Code:		0x0004
	Controller Index:	<controller id>
	Command Parameters:
	Return Parameters:	Address (6 Octets)
				Bluetooth_Version (1 Octet)
				Manufacturer (2 Octets)
				Supported_Settings (4 Octets)
				Current_Settings (4 Octets)
				Class_Of_Device (3 Octets)
				Name (249 Octets)
				Short_Name (11 Octets)

	This command is used to retreive the current state and basic
	information of a controller. It is typically used right after
	getting the response to the Read Controller Index List command
	or an Index Added event.

	If not short name is set the Short_Name parameter will be empty
	(begin with a nul byte).

	Current_Settings & Supported_Settings is a bitmask with
	currently the following available bits:

		1	Powered
		2	Connectable
		3	Fast Connectable
		4	Discoverable
		5	Pairable
		6	Link Level Security (Sec. mode 3)
		7	Secure Simple Pairing
		8	Basic Rate/Enhanced Data Rate
		9	High Speed
		10	Low Energy
		11	Advertising
		12	Secure Connections
		13	Debug Keys
		14	Privacy

	This command generates a Command Complete event on success or
	a Command Status event on failure.

	Possible errors:	Invalid Parameters
				Invalid Index


Set Powered Command
===================

	Command Code:		0x0005
	Controller Index:	<controller id>
	Command Parameters:	Powered (1 Octet)
	Return Parameters:	Current_Settings (4 Octets)

	This command is used to power on or off a controller. The
	allowed Powered command parameter values are 0x00 and 0x01. All
	other values will return Invalid Parameters.

	If discoverable setting is activated with a timeout, then
	switching the controller off will expire this timeout and
	disable discoverable.

	This command generates a Command Complete event on success or
	a Command Status event on failure.

	Possible errors:	Busy
				Invalid Parameters
				Invalid Index


Set Discoverable Command
========================

	Command Code:		0x0006
	Controller Index:	<controller id>
	Command Parameters:	Discoverable (1 Octet)
				Timeout (2 Octets)
	Return Parameters:	Current_Settings (4 Octets)

	This command is used to set the discoverable property of a
	controller. The allowed Discoverable command parameter values
	are 0x00, 0x01 and 0x02. All other values will return Invalid
	Parameters.

	Timeout is the time in seconds and is only meaningful when
	Discoverable is set to 0x01 or 0x02. Providing a timeout
	with 0x00 return Invalid Parameters. For 0x02, the timeout
	value is required.

	The value 0x00 disables discoverable, the value 0x01 enables
	general discoverable and the value 0x02 enables limited
	discoverable.

	This command is only available for BR/EDR capable controllers
	(e.g. not for single-mode LE ones). It will return Not Supported
	otherwise.

	This command can be used when the controller is not powered and
	all settings will be programmed once powered.

	However using a timeout when the controller is not powered will
	return Not Powered error.

	When switching discoverable on and the connectable setting is
	off it will return Rejected error.

	This command generates a Command Complete event on success or
	a Command Status event on failure.

	Possible errors:	Busy
				Rejected
				Not Supported
				Invalid Parameters
				Not Powered
				Invalid Index


Set Connectable Command
=======================

	Command Code:		0x0007
	Controller Index:	<controller id>
	Command Parameters:	Connectable (1 Octet)
	Return Parameters:	Current_Settings (4 Octets)

	This command is used to set the connectable property of a
	controller. The allowed Connectable command parameter values are
	0x00 and 0x01. All other values will return Invalid Parameters.

	This command is available for BR/EDR, LE-only and also dual
	mode controllers. For BR/EDR is changes the page scan setting
	and for LE controllers it changes the advertising type. For
	dual mode controllers it affects both settings.

	For LE capable controllers the connectable setting only takes
	affect when advertising is enabled.

	This command can be used when the controller is not powered and
	all settings will be programmed once powered.

	When switching connectable off, it will also switch off the
	discoverable setting. Switching connectable back on will not
	restore a previous discoverable. It will stay off and needs
	to be manually switched back on.

	When switching connectable off, it will expire a discoverable
	setting with a timeout.

	This command generates a Command Complete event on success or
	a Command Status event on failure.

	Possible errors:	Busy
				Not Supported
				Invalid Parameters
				Invalid Index


Set Fast Connectable Command
============================

	Command Code:		0x0008
	Controller Index:	<controller id>
	Command Parameters:	Enable (1 Octet)
	Return Parameters:	Current_Settings (4 Octets)

	This command is used to set the controller into a connectable
	state where the page scan parameters have been set in a way to
	favor faster connect times with the expense of higher power
	consumption.

	The allowed values of the Enable command parameter are 0x00 and
	0x01. All other values will return Invalid Parameters.

	This command is only available for BR/EDR capable controllers
	(e.g. not for single-mode LE ones). It will return Not Supported
	otherwise.

	This command can only be used when the controller is powered on
	and will return Not Powerd otherwise.

	If connectable is not set, then this command will fail with
	Rejected error.

	This command generates a Command Complete event on success or
	a Command Status event on failure.

	Possible errors:	Failed
				Busy
				Rejected
				Not Supported
				Invalid Parameters
				Not Powered
				Invalid Index


Set Pairable Command
====================

	Command Code:		0x0009
	Controller Index:	<controller id>
	Command Parameters:	Pairable (1 Octet)
	Return Parameters:	Current_Settings (4 Octets)

	This command is used to set the pairable property of an
	controller. The allowed values for the Pairable command
	parameter are 0x00 and 0x01. All other values will return
	Invalid Parameters.

	This command can be used when the controller is not powered and
	all settings will be programmed once powered.

	Turning pairable on will not automatically switch the controller
	into connectable mode. That needs to be done separately.

	The setting will be remembered during power down/up toggles.

	This command generates a Command Complete event on success or
	a Command Status event on failure.

	Possible errors:	Invalid Parameters
				Invalid Index


Set Link Security Command
=========================

	Command Code:		0x000A
	Controller Index:	<controller id>
	Command Parameters:	Link_Security (1 Octet)
	Return Parameters:	Current_Settings (4 Octets)

	This command is used to either enable or disable link level
	security for an controller (also known as Security Mode 3). The
	allowed values for the Link_Security command parameter are 0x00
	and 0x01. All other values will return Invalid Parameters.

	This command is only available for BR/EDR capable controllers
	(e.g. not for single-mode LE ones). It will return Not Supported
	otherwise.

	This command can be used when the controller is not powered and
	all settings will be programmed once powered.

	This command generates a Command Complete event on success or
	a Command Status event on failure.

	Possible errors:	Busy
				Not Supported
				Invalid Parameters
				Invalid Index


Set Secure Simple Pairing Command
=================================

	Command Code:		0x000B
	Controller Index:	<controller id>
	Command Parameters:	Secure_Simple_Pairing (1 Octet)
	Return Parameters:	Current_Settings (4 Octets)

	This command is used to enable/disable Secure Simple Pairing
	support for a controller. The allowed values for the
	Secure_Simple_Pairing command parameter are 0x00 and 0x01. All
	other values will return Invalid Parameters.

	This command is only available for BR/EDR capable controllers
	supporting the core specification version 2.1 or greater
	(e.g. not for single-mode LE controllers or pre-2.1 ones).

	This command can be used when the controller is not powered and
	all settings will be programmed once powered.

	In case the controller does not support Secure Simple Pairing,
	the command will fail regardless with Not Supported error.

	This command generates a Command Complete event on success or
	a Command Status event on failure.

	Possible errors:	Busy
				Not Supported
				Invalid Parameters
				Invalid Index

Set High Speed Command
======================

	Command Code:		0x000C
	Controller Index:	<controller id>
	Command Parameters:	High_Speed (1 Octet)
	Return Parameters:	Current_Settings (4 Octets)

	This command is used to enable/disable Bluetooth High Speed
	support for a controller. The allowed values for the High_Speed
	command parameter are 0x00 and 0x01. All other values will
	return Invalid Parameters.

	This command is only available for BR/EDR capable controllers
	(e.g. not for single-mode LE ones).

	This command can be used when the controller is not powered and
	all settings will be programmed once powered.

	To enable High Speed support, it is required that Secure Simple
	Pairing support is enabled first. High Speed support is not
	possible for connections without Secure Simple Pairing.

	When switching Secure Simple Pairing off, the support for High
	Speed will be switched off as well. Switching Secure Simple
	Pairing back on, will not re-enable High Speed support. That
	needs to be done manually.

	This command generates a Command Complete event on success or
	a Command Status event on failure.

	Possible errors:	Not Supported
				Invalid Parameters
				Invalid Index


Set Low Energy Command
======================

	Command Code:		0x000D
	Controller Index:	<controller id>
	Command Parameters:	Low_Energy (1 Octet)
	Return Parameters:	Current_Settings (4 Octets)

	This command is used to enable/disable Low Energy support for a
	controller. The allowed values of the Low_Energy command
	parameter are 0x00 and 0x01. All other values will return
	Invalid Parameters.

	This command is only available for LE capable controllers and
	will yield in a Not Supported error otherwise.

	This command can be used when the controller is not powered and
	all settings will be programmed once powered.

	In case the kernel subsystem does not support Low Energy or the
	controller does not either, the command will fail regardless.

	This command generates a Command Complete event on success or
	a Command Status event on failure.

	Possible errors:	Busy
				Not Supported
				Invalid Parameters
				Invalid Index


Set Device Class
================

	Command Code:		0x000E
	Controller Index:	<controller id>
	Command Parameters:	Major_Class (1 Octet)
				Minor_Class (1 Octet)
	Return Parameters:	Class_Of_Device (3 Octets)

	This command is used to set the major and minor device class for
	BR/EDR capable controllers.

	This command will also implicitly disable caching of pending CoD
	and EIR updates.

	This command is only available for BR/EDR capable controllers
	(e.g. not for single-mode LE ones).

	This command can be used when the controller is not powered and
	all settings will be programmed once powered.

	In case the controller is powered off, 0x000000 will be returned
	for the class of device parameter. And after power on the new
	value will be announced via class of device changed event.

	This command generates a Command Complete event on success or
	a Command Status event on failure.

	Possible errors:	Busy
				Not Supported
				Invalid Parameters
				Invalid Index


Set Local Name Command
======================

	Command Code:		0x000F
	Controller Index:	<controller id>
	Command Parameters:	Name (249 Octets)
				Short_Name (11 Octets)
	Return Parameters:	Name (249 Octets)
				Short_Name (11 Octets)

	This command is used to set the local name of a controller. The
	command parameters also include a short name which will be used
	in case the full name doesn't fit within EIR/AD data.

	The name parameters need to always end with a null byte (failure
	to do so will cause the command to fail).

	This command can be used when the controller is not powered and
	all settings will be programmed once powered.

	The values of name and short name will be remembered when
	switching the controller off and back on again. So the name
	and short name only have to be set once when a new controller
	is found and will stay until removed.

	This command generates a Command Complete event on success or
	a Command Status event on failure.

	Possible errors:	Invalid Parameters
				Invalid Index


Add UUID Command
================

	Command Code:		0x0010
	Controller Index:	<controller id>
	Command Parameters:	UUID (16 Octets)
				SVC_Hint (1 Octet)
	Return Parameters:	Class_Of_Device (3 Octets)

	This command is used to add a UUID to be published in EIR
	and/or AD data. The accompanied SVC_Hint parameter is used to
	tell the kernel whether the service class bits of the Class of
	Device value need modifying due to this UUID.

	This command can be used when the controller is not powered and
	all settings will be programmed once powered.

	In case the controller is powered off, 0x000000 will be returned
	for the class of device parameter. And after power on the new
	value will be announced via class of device changed event.

	This command generates a Command Complete event on success or
	a Command Status event on failure.

	Possible errors:	Busy
				Invalid Parameters
				Invalid Index


Remove UUID Command
===================

	Command Code:		0x0011
	Controller Index:	<controller id>
	Command Parameters:	UUID (16 Octets)
	Return Parameters:	Class_Of_Device (3 Octets)

	This command is used to remove a UUID previously added using the
	Add UUID command.

	When the UUID parameter is an empty UUID (16 x 0x00), then all
	previously loaded UUIDs will be removed.

	This command can be used when the controller is not powered and
	all settings will be programmed once powered.

	In case the controller is powered off, 0x000000 will be returned
	for the class of device parameter. And after power on the new
	value will be announced via class of device changed event.

	This command generates a Command Complete event on success or
	a Command Status event on failure.

	Possible errors:	Busy
				Invalid Parameters
				Invalid Index


Load Link Keys Command
======================

	Command Code:		0x0012
	Controller Index:	<controller id>
	Command Parameters:	Debug_Keys (1 Octet)
				Key_Count (2 Octets)
				Key1 {
					Address (6 Octets)
					Address_Type (1 Octet)
					Key_Type (1 Octet)
					Value (16 Octets)
					PIN_Length (1 Octet)
				}
				Key2 { }
				...
	Return Parameters:

	This command is used to feed the kernel with currently known
	link keys. The command does not need to be called again upon the
	receiption of New Link Key events since the kernel updates its
	list automatically.

	The Debug_Keys parameter is used to tell the kernel whether to
	accept the usage of debug keys or not. The allowed values for
	this parameter are 0x00 and 0x01. All other values will return
	an Invalid Parameters response.

	Usage of the Debug_Keys parameter is deprecated and has been
	replaced with the Set Debug Keys command. When setting the
	Debug_Keys option via Load Link Keys command it has the same
	affect as setting it via Set Debug Keys and applies to all
	keys in the system.

	Possible values for the Address_Type parameter:
		0	BR/EDR
		1	Reserved (not in use)
		2	Reserved (not in use)

	Public and random LE addresses are not valid and will be rejected.

	Currently defined Key_Type values are:

		0x00	Combination key
		0x01	Local Unit key
		0x02	Remote Unit key
		0x03	Debug Combination key
		0x04	Unauthenticated Combination key from P-192
		0x05	Authenticated Combination key from P-192
		0x06	Changed Combination key
		0x07	Unauthenticated Combination key from P-256
		0x08	Authenticated Combination key from P-256

	This command can be used when the controller is not powered.

	This command generates a Command Complete event on success or
	a Command Status event on failure.

	Possible errors:	Invalid Parameters
				Invalid Index


Load Long Term Keys Command
===========================

	Command Code:		0x0013
	Controller Index:	<controller id>
	Command Parameters:	Key_Count (2 Octets)
				Key1 {
					Address (6 Octets)
					Address_Type (1 Octet)
					Key_Type (1 Octet)
					Master (1 Octet)
					Encryption_Size (1 Octet)
					Encryption_Diversifier (2 Octets)
					Random_Number (8 Octets)
					Value (16 Octets)
				}
				Key2 {  }
				...
	Return Parameters:

	This command is used to feed the kernel with currently known
	(SMP) Long Term Keys. The command does not need to be called
	again upon the receiption of New Long Term Key events since the
	kernel updates its list automatically.

	Possible values for the Address_Type parameter:
		0	Reserved (not in use)
		1	LE Public
		2	LE Random

	The provided Address and Address_Type are the identity of
	a device. So either its public address or static random address.

	Unresolvable random addresses and resolvable random addresses are
	not valid and will be rejected.

	Currently defined Key_Type values are:

		0x00	Unauthenticated key
		0x01	Authenticated key

	This command can be used when the controller is not powered.

	This command generates a Command Complete event on success or
	a Command Status event on failure.

	Possible errors:	Invalid Parameters
				Invalid Index


Disconnect Command
==================

	Command Code:		0x0014
	Controller Index:	<controller id>
	Command Parameters:	Address (6 Octets)
				Address_Type (1 Octet)
	Return Parameters:	Address (6 Octets)
				Address_Type (1 Octet)

	This command is used to force the disconnection of a currently
	connected device.

	Possible values for the Address_Type parameter:
		0	BR/EDR
		1	LE Public
		2	LE Random

	This command can only be used when the controller is powered.

	This command generates a Command Complete event on success
	or failure.

	Possible errors:	Not Connected
				Busy
				Invalid Parameters
				Not Powered
				Invalid Index


Get Connections Command
=======================

	Command Code:		0x0015
	Controller Index:	<controller id>
	Command Parameters:
	Return Parameters:	Connection_Count (2 Octets)
				Address1 {
					Address (6 Octets)
					Address_Type (1 Octet)
				}
				Address2 { }
				...

	This command is used to retreive a list of currently connected
	devices.

	Possible values for the Address_Type parameter:
		0	BR/EDR
		1	LE Public
		2	LE Random

	For devices using resolvable random addresses with a known
	identity resolving key, the Address and Address_Type will
	contain the identity information.

	This command can only be used when the controller is powered.

	This command generates a Command Complete event on success or
	a Command Status event on failure.

	Possible errors:	Invalid Parameters
				Not Powered
				Invalid Index


PIN Code Reply Command
=======================

	Command Code:		0x0016
	Controller Index:	<controller id>
	Command Parameters:	Address (6 Octets)
				Address_Type (1 Octet)
				PIN_Length (1 Octet)
				PIN_Code (16 Octets)
	Return Parameters:	Address (6 Octets)
				Address_Type (1 Octet)

	This command is used to respond to a PIN Code request event.

	Possible values for the Address_Type parameter:
		0	BR/EDR
		1	LE Public
		2	LE Random

	This command can only be used when the controller is powered.

	This command generates a Command Complete event on success
	or failure.

	Possible errors:	Not Connected
				Invalid Parameters
				Not Powered
				Invalid Index


PIN Code Negative Reply Command
===============================

	Command Code:		0x0017
	Controller Index:	<controller id>
	Command Parameters:	Address (6 Octets)
				Address_Type (1 Octet)
	Return Parameters:	Address (6 Octets)
				Address_Type (1 Octet)

	This command is used to return a negative response to a PIN Code
	Request event.

	Possible values for the Address_Type parameter:
		0	BR/EDR
		1	LE Public
		2	LE Random

	This command can only be used when the controller is powered.

	This command generates a Command Complete event on success
	or failure.

	Possible errors:	Not Connected
				Invalid Parameters
				Not Powered
				Invalid Index


Set IO Capability Command
=========================

	Command Code:		0x0018
	Controller Index:	<controller id>
	Command Parameters:	IO_Capability (1 Octet)
	Return Parameters:

	This command is used to set the IO Capability used for pairing.
	The command accepts both SSP and SMP values. The KeyboardDisplay
	SMP value (which doesn't exist for SSP will) automatically be
	downgraded to DisplayYesNo by the kernel for SSP pairing events.

	This command can be used when the controller is not powered.

	This command generates a Command Complete event on success or
	a Command Status event on failure.

	Possible errors:	Invalid Parameters
				Invalid Index


Pair Device Command
===================

	Command Code:		0x0019
	Controller Index:	<controller id>
	Command Parameters:	Address (6 Octets)
				Address_Type (1 Octet)
				IO_Capability (1 Octet)
	Return Parameters:	Address (6 Octets)
				Address_Type (1 Octet)

	This command is used to trigger pairing with a remote device.
	The IO_Capability command parameter is used to temporarily (for
	this pairing event only) override the global IO Capaility (set
	using the Set IO Capability command).

	Possible values for the Address_Type parameter:
		0	BR/EDR
		1	LE Public
		2	LE Random

	The Address and Address_Type of the return parameters will
	return the identity address if know. In case of resolvable
	random address given as command parameters and the remote
	provides an identity resolving key, the return parameters
	will provide the resolved address.

	To allow tracking of which resolvable random address changed
	into which identity address, the New Identity Resolving Key
	event will be send before receiving Command Complete event
	for this command.

	This command can only be used when the controller is powered.

	This command generates a Command Complete event on success
	or failure.

	Possible errors:	Connect Failed
				Busy
				Invalid Parameters
				Not Powered
				Invalid Index


Cancel Pair Device
==================

	Command Code:		0x001A
	Controller Index:	<controller id>
	Command Parameters:	Address (6 Octets)
				Address_Type (1 Octet)
	Return Parameters:	Address (6 Octets)
				Address_Type (1 Octet)

	The Address and Address_Type parameters should match what was
	given to a preceding Pair Device command.

	Possible values for the Address_Type parameter:
		0	BR/EDR
		1	LE Public
		2	LE Random

	This command can only be used when the controller is powered.

	This command generates a Command Complete event on success
	or failure.

	Possible errors:	Invalid Parameters
				Not Powered
				Invalid Index


Unpair Device Command
=====================

	Command Code:		0x001B
	Controller Index:	<controller id>
	Command Parameters:	Address (6 Octets)
				Address_Type (1 Octet)
				Disconnect (1 Octet)
	Return Parameters:	Address (6 Octets)
				Address_Type (1 Octet)

	Removes all keys associated with the remote device.

	Possible values for the Address_Type parameter:
		0	BR/EDR
		1	LE Public
		2	LE Random

	The Disconnect parameter tells the kernel whether to forcefully
	disconnect any existing connections to the device. It should in
	practice always be 1 except for some special GAP qualification
	test-cases where a key removal without disconnecting is needed.

	When unpairing a device its link key, long term key and if
	provided identity resolving key will be purged.

	For devices using resolvable random addresses where the identity
	resolving key was available, after this command they will now no
	longer be resolved. The device will essentially become private
	again.

	This command can only be used when the controller is powered.

	This command generates a Command Complete event on success
	or failure.

	Possible errors:	Not Paired
				Invalid Parameters
				Not Powered
				Invalid Index


User Confirmation Reply Command
===============================

	Command Code:		0x001C
	Controller Index:	<controller id>
	Command Parameters:	Address (6 Octets)
				Address_Type (1 Octet)
	Return Parameters:	Address (6 Octets)
				Address_Type (1 Octet)

	This command is used to respond to a User Confirmation Request
	event.

	Possible values for the Address_Type parameter:
		0	BR/EDR
		1	LE Public
		2	LE Random

	This command can only be used when the controller is powered.

	This command generates a Command Complete event on success
	or failure.

	Possible errors:	Not Connected
				Invalid Parameters
				Not Powered
				Invalid Index


User Confirmation Negative Reply Command
========================================

	Command Code:		0x001D
	Controller Index:	<controller id>
	Command Parameters:	Address (6 Octets)
				Address_Type (1 Octet)
	Return Parameters:	Address (6 Octets)
				Address_Type (1 Octet)

	This command is used to return a negative response to a User
	Confirmation Request event.

	Possible values for the Address_Type parameter:
		0	BR/EDR
		1	LE Public
		2	LE Random

	This command can only be used when the controller is powered.

	This command generates a Command Complete event on success
	or failure.

	Possible errors:	Not Connected
				Invalid Parameters
				Not Powered
				Invalid Index


User Passkey Reply Command
==========================

	Command Code:		0x001E
	Controller Index:	<controller id>
	Command Parameters:	Address (6 Octets)
				Address_Type (1 Octet)
				Passkey (4 Octets)
	Return Parameters:	Address (6 Octets)
				Address_Type (1 Octet)

	This command is used to respond to a User Confirmation Passkey
	Request event.

	Possible values for the Address_Type parameter:
		0	BR/EDR
		1	LE Public
		2	LE Random

	This command can only be used when the controller is powered.

	This command generates a Command Complete event on success
	or failure.

	Possible errors:	Not Connected
				Invalid Parameters
				Not Powered
				Invalid Index


User Passkey Negative Reply Command
===================================

	Command Code:		0x001F
	Controller Index:	<controller id>
	Command Parameters:	Address (6 Octets)
				Address_Type (1 Octet)
	Return Parameters:	Address (6 Octets)
				Address_Type (1 Octet)

	This command is used to return a negative response to a User
	Passkey Request event.

	Possible values for the Address_Type parameter:
		0	BR/EDR
		1	LE Public
		2	LE Random

	This command can only be used when the controller is powered.

	This command generates a Command Complete event on success
	or failure.

	Possible errors:	Not Connected
				Invalid Parameters
				Not Powered
				Invalid Index


Read Local Out Of Band Data Command
===================================

	Command Code:		0x0020
	Controller Index:	<controller id>
	Command Parameters:
	Return Parameters:	Hash_192 (16 Octets)
				Randomizer_192 (16 Octets)
				Hash_256 (16 Octets, Optional)
				Randomizer_256 (16 Octets, Optional)

	This command is used to read the local Out of Band data.

	This command can only be used when the controller is powered.

	If Secure Connections support is enabled, then this command
	will return P-192 versions of hash and randomizer as well as
	P-256 versions of both.

	This command generates a Command Complete event on success or
	a Command Status event on failure.

	Possible errors:	Not Supported
				Busy
				Invalid Parameters
				Not Powered
				Invalid Index


Add Remote Out Of Band Data Command
===================================

	Command Code:		0x0021
	Controller Index:	<controller id>
	Command Parameters:	Address (6 Octets)
				Address_Type (1 Octet)
				Hash_192 (16 Octets)
				Randomizer_192 (16 Octets)
				Hash_256 (16 Octets, Optional)
				Randomizer_256 (16 Octets, Optional)
	Return Parameters:	Address (6 Octets)
				Address_Type (1 Octet)

	This command is used to provide Out of Band data for a remote
	device.

	Possible values for the Address_Type parameter:
		0	BR/EDR
		1	LE Public
		2	LE Random

	Provided Out Of Band data is persistent over power down/up toggles.

	This command also accept optional P-256 versions of hash and
	randomizer. If they are not provided, then they are set to
	zero value.

	The P-256 versions of both can also be provided when the
	support for Secure Connections is not enabled. However in
	that case they will never be used.

	To only provide the P-256 versions of hash and randomizer,
	it is valid to leave both P-192 fields as zero values. If
	Secure Connections is disabled, then of course this is the
	same as not providing any data at all.

	This command generates a Command Complete event on success
	or failure.

	Possible errors:	Failed
				Invalid Parameters
				Not Powered
				Invalid Index


Remove Remote Out Of Band Data Command
======================================

	Command Code:		0x0022
	Controller Index:	<controller id>
	Command Parameters:	Address (6 Octets)
				Address_Type (1 Octet)
	Return Parameters:	Address (6 Octets)
				Address_Type (1 Octet)

	This command is used to remove data added using the Add Remote
	Out Of Band Data command.

	Possible values for the Address_Type parameter:
		0	BR/EDR
		1	LE Public
		2	LE Random

	This command generates a Command Complete event on success
	or failure.

	Possible errors:	Invalid Parameters
				Not Powered
				Invalid Index


Start Discovery Command
=======================

	Command Code:		0x0023
	Controller Index:	<controller id>
	Command Parameters:	Address_Type (1 Octet)
	Return Parameters:	Address_Type (1 Octet)

	This command is used to start the process of discovering remote
	devices. A Device Found event will be sent for each discovered
	device.

	Possible values for the Address_Type parameter are a bit-wise or
	of the following bits:

		1	BR/EDR
		2	LE Public
		3	LE Random

	By combining these e.g. the following values are possible:

		1	BR/EDR
		6	LE (public & random)
		7	BR/EDR/LE (interleaved discovery)

	This command can only be used when the controller is powered.

	This command generates a Command Complete event on success
	or failure.

	Possible errors:	Busy
				Not Supported
				Invalid Parameters
				Not Powered
				Invalid Index


Stop Discovery Command
======================

	Command Code:		0x0024
	Controller Index:	<controller id>
	Command Parameters:	Address_Type (1 Octet)
	Return Parameters:	Address_Type (1 Octet)

	This command is used to stop the discovery process started using
	the Start Discovery command.

	This command can only be used when the controller is powered.

	This command generates a Command Complete event on success
	or failure.

	Possible errors:	Rejected
				Invalid Parameters
				Invalid Index


Confirm Name Command
====================

	Command Code:		0x0025
	Controller Index:	<controller id>
	Command Parameters:	Address (6 Octets)
				Address_Type (1 Octet)
				Name_Known (1 Octet)
	Return Parameters:	Address (6 Octets)
				Address_Type (1 Octet)

	This command is only valid during device discovery and is
	expected for each Device Found event with the Confirm Name
	flag set.

	Possible values for the Address_Type parameter:
		0	BR/EDR
		1	LE Public
		2	LE Random

	The Name_Known parameter should be set to 0x01 if user space
	knows the name for the device and 0x00 if it doesn't. If set to
	0x00 the kernel will perform a name resolving procedure for the
	device in question.

	This command can only be used when the controller is powered.

	This command generates a Command Complete event on success
	or failure.

	Possible errors:	Failed
				Invalid Parameters
				Invalid Index


Block Device Command
====================

	Command Code:		0x0026
	Controller Index:	<controller id>
	Command Parameters:	Address (6 Octets)
				Address_Type (1 Octet)
	Return Parameters:	Address (6 Octets)
				Address_Type (1 Octet)

	This command is used to add a device to the list of devices
	which should be blocked from being connect to the local
	controller.

	Possible values for the Address_Type parameter:
		0	BR/EDR
		1	LE Public
		2	LE Random

	This command can be used when the controller is not powered.

	This command generates a Command Complete event on success
	or failure.

	Possible errors:	Failed
				Invalid Parameters
				Invalid Index


Unblock Device Command
======================

	Command Code:		0x0027
	Controller Index:	<controller id>
	Command Parameters:	Address (6 Octets)
				Address_Type (1 Octet)
	Return Parameters:	Address (6 Octets)
				Address_Type (1 Octet)

	This command is used to remove a device from the list of blocked
	devices (where it was added to using the Block Device command).

	Possible values for the Address_Type parameter:
		0	BR/EDR
		1	LE Public
		2	LE Random

	This command can be used when the controller is not powered.

	This command generates a Command Complete event on success
	or failure.

	Possible errors:	Invalid Parameters
				Invalid Index


Set Device ID Command
=====================

	Command Code:		0x0028
	Controller Index:	<controller id>
	Command Parameters:	Source (2 Octets)
				Vendor (2 Octets)
				Product (2 Octets)
				Version (2 Octets)
	Return Parameters:

	This command can be used when the controller is not powered and
	all settings will be programmed once powered.

	The Source parameter selects the organization that assigned the
	Vendor parameter:

		0x0000	Disable Device ID
		0x0001	Bluetooth SIG
		0x0002	USB Implementer’s Forum

	The information are put into the EIR data. If the controller does
	not support EIR or if SSP is disabled, this command will still
	succeed. The information are stored for later use and will survive
	toggling SSP on and off.

	This command generates a Command Complete event on success or
	a Command Status event on failure.

	Possible errors:	Invalid Parameters
				Invalid Index


Set Advertising Command
=======================

	Command Code:		0x0029
	Controller Index:	<controller id>
	Command Parameters:	Advertising (1 Octet)
	Return Parameters:	Current_Settings (4 Octets)

	This command is used to enable LE advertising on a controller
	that supports it. The allowed values for the Advertising
	command parameter are 0x00 and 0x01. All other values will
	return Invalid Parameters.

	A pre-requisite is that LE is already enabled, otherwise
	this command will return a "rejected" response.

	This command generates a Command Complete event on success or a
	Command Status event on failure.

	Possible errors:	Busy
				Rejected
				Not Supported
				Invalid Parameters
				Invalid Index


Set BR/EDR Command
==================

	Command Code:		0x002A
	Controller Index:	<controller id>
	Command Parameters:	BR/EDR (1 Octet)
	Return Parameters:	Current_Settings (4 Octets)

	This command is used to enable or disable BR/EDR support
	on a dual-mode controller. The allowed values for the Advertising
	command parameter are 0x00 and 0x01. All other values will
	return Invalid Parameters.

	A pre-requisite is that LE is already enabled, otherwise
	this command will return a "rejected" response. Enabling BR/EDR
	can be done both when powered on and powered off, however
	disabling it can only be done when powered off (otherwise the
	command will again return "rejected"). Disabling BR/EDR will
	automatically disable all other BR/EDR related settings.

	This command generates a Command Complete event on success or a
	Command Status event on failure.

	Possible errors:	Busy
				Rejected
				Not Supported
				Invalid Parameters
				Invalid Index


Set Static Address Command
==========================

	Command Code:		0x002B
	Controller Index:	<controller id>
	Command Parameters:	Address (6 Octets)
	Return Parameters:

	This command allows for setting the static random address. It is
	only supported on controllers with LE support. The static random
	address is suppose to be valid for the lifetime of the
	controller or at least until the next power cycle. To ensure
	such behavior, setting of the address is limited to when the
	controller is powered off.

	The special BDADDR_ANY address (00:00:00:00:00:00) can be used
	to disable the static address.

	When a controller has a public address (which is required for
	all dual-mode controllers), this address is not used. Only when
	the controller information reports BDADDR_ANY (00:00:00:00:00:00),
	it is required to configure a static address first.

	If privacy mode is enabled and the controller is single mode
	LE only without a public address, the static random address is
	used as identity address.

	This command generates a Command Complete event on success or a
	Command Status event on failure.

	Possible errors:	Rejected
				Not Supported
				Invalid Parameters
				Invalid Index


Set Scan Parameters Command
===========================

	Command Code:		0x002C
	Controller Index:	<controller id>
	Command Parameters:	Interval (2 Octets)
				Window (2 Octets)
	Return Parameters:

	This command allows for setting the Low Energy scan parameters
	used for connection establishment and passive scanning. It is
	only supported on controllers with LE support.

	This command generates a Command Complete event on success or a
	Command Status event on failure.

	Possible errors:	Rejected
				Not Supported
				Invalid Parameters
				Invalid Index


Set Secure Connections Command
==============================

	Command Code:		0x002D
	Controller Index:	<controller id>
	Command Parameters:	Secure_Connections (1 Octet)
	Return Parameters:	Current_Settings (4 Octets)

	This command is used to enable/disable Secure Connections
	support for a controller. The allowed values for the
	Secure_Connections command parameter are 0x00, 0x01 and 0x02.
	All other values will return Invalid Parameters.

	The value 0x00 disables Secure Connections, the value 0x01
	enables Secure Connections and the value 0x02 enables Secure
	Connections Only mode.

	This command is only available for BR/EDR capable controllers
	supporting the core specification version 4.1 or greater
	(e.g. not for single-mode LE controllers or pre-4.1 ones).

	This command can be used when the controller is not powered and
	all settings will be programmed once powered.

	In case the controller does not support Secure Connections
	the command will fail regardless with Not Supported error.

	This command generates a Command Complete event on success or
	a Command Status event on failure.

	Possible errors:	Busy
				Not Supported
				Invalid Parameters
				Invalid Index


Set Debug Keys Command
======================

	Command Code:		0x002E
	Controller Index:	<controller id>
	Command Parameters:	Debug_Keys (1 Octet)
	Return Parameters:	Current_Settings (4 Octets)

	This command is used to tell the kernel whether to accept the
	usage of debug keys or not. The allowed values for this parameter
	are 0x00 and 0x01. All other values will return an Invalid Parameters
	response.

	This command generates a Command Complete event on success or
	a Command Status event on failure.

	Possible errors:	Busy
				Not Supported
				Invalid Parameters
				Invalid Index


Set Privacy Command
===================

	Command Code:		0x002F
	Controller Index:	<controller id>
	Command Parameters:	Privacy (1 Octet)
				Identity_Resolving_Key (16 Octets)
	Return Parameters:	Current_Settings (4 Octets)

	This command is used to enable Low Energy Privacy feature using
	resolvable private addresses.

	The value 0x00 disables privacy mode, the value 0x01 enables
	privacy mode.

	When the controller has a public address (mandatory for dual-mode
	controllers) it is used as identity address. In case the controller
	is single mode LE only without a public address, it is required
	to configure a static random andress first. The privacy mode can
	only be enabled when an identity address is available.

	The Identity_Resolving_Key is the local key assigned for the local
	resolvable private address.

	Possible errors:	Busy
				Not Supported
				Invalid Parameters
				Invalid Index


Load Identity Resolving Keys Command
====================================

	Command Code:		0x0030
	Controller Index:	<controller id>
	Command Parameters:	Key_Count (2 Octets)
				Key1 {
					Address (6 Octets)
					Address_Type (1 Octet)
					Value (16 Octets)
				}
				Key2 {  }
				...
	Return Parameters:

	This command is used to feed the kernel with currently known
	identity resolving keys. The command does not need to be called
	again upon the receiption of New Identity Resolving Key events
	since the kernel updates its list automatically.

	Possible values for the Address_Type parameter:
		0	Reserved (not in use)
		1	LE Public
		2	LE Random

	The provided Address and Address_Type are the identity of
	a device. So either its public address or static random address.

	Unresolvable random addresses and resolvable random addresses are
	not valid and will be rejected.

	This command can be used when the controller is not powered.

	This command generates a Command Complete event on success or
	a Command Status event on failure.

	Possible errors:	Invalid Parameters
				Invalid Index


Get Connection Information Command
==================================

	Command Code:		0x0031
	Controller Index:	<controller id>
	Command Parameters:	Address (6 Octets)
				Address_Type (1 Octet)
	Return Parameters:	Address (6 Octets)
				Address_Type (1 Octet)
				RSSI (1 Octet)
				TX_Power (1 Octet)
				Max_TX_Power (1 Octet)

	This command is used to get connection information.

	TX_Power and Max_TX_Power can be set to 127 if values are invalid or
	unknown.

	This command generates a Command Complete event on success and
	on failure. In case of failure only Address and Address_Type fields
	are valid and values of remaining parameters are considered invalid
	and shall be ignored.

	Possible errors:	Not Connected
				Not Powered
				Invalid Parameters
				Invalid Index


Command Complete Event
======================

	Event Code:		0x0001
	Controller Index:	<controller id> or <non-controller>
	Event Parameters:	Command_Opcode (2 Octets)
				Status (1 Octet)
				Return_Parameters

	This event is an indication that a command has completed. The
	fixed set of parameters includes the opcode to identify the
	command that completed as well as a status value to indicate
	success or failure. The rest of the parameters are command
	specific and documented in the section for each command
	separately.


Command Status Event
====================

	Event Code:		0x0002
	Controller Index:	<controller id> or <non-controller>
	Event Parameters:	Command_Opcode (2 Octets)
				Status (1 Octet)

	The command status event is used to indicate an early status for
	a pending command. In the case that the status indicates failure
	(anything else except success status) this also means that the
	command has finished executing.


Controller Error Event
======================

	Event Code:		0x0003
	Controller Index:	<controller id>
	Event Parameters:	Error_Code (1 Octet)

	This event maps straight to the HCI Hardware Error event and is
	used to indicate something wrong with the controller hardware.


Index Added Event
=================

	Event Code:		0x0004
	Controller Index:	<controller id>
	Event Parameters:

	This event indicates that a new controller has been added to the
	system. It is usually followed by a Read Controller Information
	command.


Index Removed Event
===================

	Event Code:		0x0005
	Controller Index:	<controller id>
	Event Parameters:

	This event indicates that a controller has been removed from the
	system.


New Settings Event
==================

	Event Code:		0x0006
	Controller Index:	<controller id>
	Event Parameters:	Current_Settings (4 Octets)

	This event indicates that one or more of the settings for a
	controller has changed.


Class Of Device Changed Event
=============================

	Event Code:		0x0007
	Controller Index:	<controller id>
	Event Parameters:	Class_Of_Device (3 Octets)

	This event indicates that the Class of Device value for the
	controller has changed. When the controller is powered off the
	Class of Device value will always be reported as zero.


Local Name Changed Event
========================

	Event Code:		0x0008
	Controller Index:	<controller id>
	Event Parameters:	Name (249 Octets)
				Short_Name (11 Octets)

	This event indicates that the local name of the controller has
	changed.


New Link Key Event
==================

	Event Code:		0x0009
	Controller Index:	<controller id>
	Event Parameters:	Store_Hint (1 Octet)
				Key {
					Address (6 Octets)
					Address_Type (1 Octet)
					Key_Type (1 Octet)
					Value (16 Octets)
					PIN_Length (1 Octet)
				}

	This event indicates that a new link key has bee generated for a
	remote device.

	The Store_Hint parameter indicates whether the host is expected
	to store the key persistently or not (e.g. this would not be set
	if the authentication requirement was "No Bonding").

	Possible values for the Address_Type parameter:
		0	BR/EDR
		1	Reserved (not in use)
		2	Reserved (not in use)

	Public and random LE addresses are not valid and will be rejected.

	Currently defined Key_Type values are:

		0x00	Combination key
		0x01	Local Unit key
		0x02	Remote Unit key
		0x03	Debug Combination key
		0x04	Unauthenticated Combination key from P-192
		0x05	Authenticated Combination key from P-192
		0x06	Changed Combination key
		0x07	Unauthenticated Combination key from P-256
		0x08	Authenticated Combination key from P-256

	Receiving this event indicates that a pairing procecure has
	been completed.


New Long Term Key Event
=======================

	Event Code:		0x000A
	Controller Index:	<controller id>
	Event Parameters:	Store_Hint (1 Octet)
				Key {
					Address (6 Octets)
					Address_Type (1 Octet)
					Key_Type (1 Octet)
					Master (1 Octet)
					Encryption Size (1 Octet)
					Enc. Diversifier (2 Octets)
					Random Number (8 Octets)
					Value (16 Octets)
				}

	This event indicates that a new long term key has been generated
	for a remote device.

	The Store_Hint parameter indicates whether the host is expected
	to store the key persistently or not (e.g. this would not be set
	if the authentication requirement was "No Bonding").

	Possible values for the Address_Type parameter:
		0	Reserved (not in use)
		1	LE Public
		2	LE Random

	The provided Address and Address_Type are the identity of
	a device. So either its public address or static random address.

	For unresolvable random addresses and resolvable random addresses
	without identity information and identity resolving key, the
	Store_Hint will be set to not store the long term key.

	Currently defined Key_Type values are:

		0x00	Unauthenticated key
		0x01	Authenticated key

	Receiving this event indicates that a pairing procecure has
	been completed.


Device Connected Event
======================

	Event Code:		0x000B
	Controller Index:	<controller id>
	Event Parameters:	Address (6 Octets)
				Address_Type (1 Octet)
				Flags (4 Octets)
				EIR_Data_Length (2 Octets)
				EIR_Data (0-65535 Octets)

	This event indicates that a successful baseband connection has
	been created to the remote device.

	Possible values for the Address_Type parameter:
		0	BR/EDR
		1	LE Public
		2	LE Random

	For devices using resolvable random addresses with a known
	identity resolving key, the Address and Address_Type will
	contain the identity information.

	It is possible that devices get connected via its resolvable
	random address and after New Identity Resolving Key event
	start using its identity.

	The following bits are defined for the Flags parameter:
		0	Reserved (not in use)
		1	Legacy Pairing


Device Disconnected Event
=========================

	Event Code:		0x000C
	Controller Index:	<controller id>
	Event Parameters:	Address (6 Octets)
				Address_Type (1 Octet)
				Reason (1 Octet)

	This event indicates that the baseband connection was lost to a
	remote device.

	Possible values for the Address_Type parameter:
		0	BR/EDR
		1	LE Public
		2	LE Random

	For devices using resolvable random addresses with a known
	identity resolving key, the Address and Address_Type will
	contain the identity information.

	Possible values for the Reason parameter:
		0	Unspecified
		1	Connection timeout
		2	Connection terminated by local host
		3	Connection terminated by remote host

	Note that the local/remote distinction just determines which side
	terminated the low-level connection, regardless of the
	disconnection of the higher-level profiles.

	This can sometimes be misleading and thus must be used with care.
	For example, some hardware combinations would report a locally
	initiated disconnection even if the user turned Bluetooth off in
	the remote side.


Connect Failed Event
====================

	Event Code:		0x000D
	Controller Index:	<controller id>
	Event Parameters:	Address (6 Octets)
				Address_Type (1 Octet)
				Status (1 Octet)

	This event indicates that a connection attempt failed to a
	remote device.

	Possible values for the Address_Type parameter:
		0	BR/EDR
		1	LE Public
		2	LE Random

	For devices using resolvable random addresses with a known
	identity resolving key, the Address and Address_Type will
	contain the identity information.


PIN Code Request Event
======================

	Event Code:		0x000E
	Controller Index:	<controller id>
	Event Parameters:	Address (6 Octets)
				Address_Type (1 Octet)
				Secure (1 Octet)

	This event is used to request a PIN Code reply from user space.
	The reply should either be returned using the PIN Code Reply or
	the PIN Code Negative Reply command.

	Possible values for the Address_Type parameter:
		0	BR/EDR
		1	LE Public
		2	LE Random

	Secure: 0x01  secure PIN code required
		0x00  secure PIN code not required


User Confirmation Request Event
===============================

	Event Code:		0x000F
	Controller Index:	<controller id>
	Event Parameters:	Address (6 Octets)
				Address_Type (1 Octet)
				Confirm_Hint (1 Octet)
				Value (4 Octets)

	This event is used to request a user confirmation request from
	user space.

	Possible values for the Address_Type parameter:
		0	BR/EDR
		1	LE Public
		2	LE Random

	If the Confirm_Hint parameter value is 0x01 this means that
	a simple "Yes/No" confirmation should be presented to the user
	instead of a full numerical confirmation (in which case the
	parameter value will be 0x00).

	User space should respond to this command either using the User
	Confirmation Reply or the User Confirmation Negative Reply
	command.


User Passkey Request Event
==========================

	Event Code:		0x0010
	Controller Index:	<controller id>
	Event Parameters:	Address (6 Octets)
				Address_Type (1 Octet)

	This event is used to request a passkey from user space. The
	response to this event should either be the User Passkey Reply
	command or the User Passkey Negative Reply command.

	Possible values for the Address_Type parameter:
		0	BR/EDR
		1	LE Public
		2	LE Random


Authentication Failed Event
===========================

	Event Code:		0x0011
	Controller Index:	<controller id>
	Event Parameters:	Address (6 Octets)
				Address_Type (1 Octet)
				Status (1 Octet)

	This event indicates that there was an authentication failure
	with a remote device.

	Possible values for the Address_Type parameter:
		0	BR/EDR
		1	LE Public
		2	LE Random


Device Found Event
==================

	Event Code:		0x0012
	Controller Index:	<controller id>
	Event Parameters:	Address (6 Octets)
				Address_Type (1 Octet)
				RSSI (1 Octet)
				Flags (4 Octets)
				EIR_Data_Length (2 Octets)
				EIR_Data (0-65535 Octets)

	This event indicates that a device was found during device
	discovery.

	Possible values for the Address_Type parameter:
		0	BR/EDR
		1	LE Public
		2	LE Random

	The following bits are defined for the Flags parameter:
		0	Confirm name
		1	Legacy Pairing

	The Confirm name flag indicates that the kernel wants to know
	whether user space knows the name for this device or not. If
	this flag is set user space should respond to it using the
	Confirm Name command.

	The Legacy Pairing flag indicates that Legacy Pairing is likely
	to occur when pairing with this device. An application could use
	this information to optimize the pairing process by locally
	pre-generating a PIN code and thereby eliminate the risk of
	local input timeout when pairing. Note that there is a risk of
	false-positives for this flag so user space should be able to
	handle getting something else as a PIN Request when pairing.


Discovering Event
=================

	Event Code:		0x0013
	Controller Index:	<controller id>
	Event Parameters:	Address_Type (1 Octet)
				Discovering (1 Octet)

	This event indicates that the controller has started discovering
	devices. This discovering state can come and go multiple times
	between a StartDiscover and a StopDiscovery command.

	The valid values for the Discovering parameter are 0x01
	(enabled) and 0x00 (disabled).


Device Blocked Event
====================

	Event Code:		0x0014
	Controller Index:	<controller id>
	Event Parameters:	Address (6 Octets)
				Address_Type (1 Octet)

	This event indicates that a device has been blocked using the
	Block Device command.

	Possible values for the Address_Type parameter:
		0	BR/EDR
		1	LE Public
		2	LE Random

	The event will only be sent to Management sockets other than the
	one through which the command was sent.


Device Unblocked Event
======================

	Event Code:		0x0015
	Controller Index:	<controller id>
	Event Parameters:	Address (6 Octets)
				Address_Type (1 Octet)

	This event indicates that a device has been unblocked using the
	Unblock Device command.

	Possible values for the Address_Type parameter:
		0	BR/EDR
		1	LE Public
		2	LE Random

	The event will only be sent to Management sockets other than the
	one through which the command was sent.


Device Unpaired Event
=====================

	Event Code:		0x0016
	Controller Index:	<controller id>
	Event Parameters:	Address (6 Octets)
				Address_Type (1 Octet)

	This event indicates that a device has been unpaired (i.e. all
	its keys have been removed from the kernel) using the Unpair
	Device command.

	Possible values for the Address_Type parameter:
		0	BR/EDR
		1	LE Public
		2	LE Random

	For devices using resolvable random addresses with a known
	identity resolving key, the event paramters will contain
	the identity. After receiving this event, the device will
	become essentially private again.

	The event will only be sent to Management sockets other than the
	one through which the Unpair Device command was sent.


Passkey Notify Event
====================

	Event Code:		0x0017
	Controller Index:	<controller id>
	Event Parameters:	Address (6 Octets)
				Address_Type (1 Octet)
				Passkey (4 Octets)
				Entered (1 Octet)

	This event is used to request passkey notification to the user.
	Unlike the other authentication events it does not need
	responding to using any Management command.

	Possible values for the Address_Type parameter:
		0	BR/EDR
		1	LE Public
		2	LE Random

	The Passkey parameter indicates the passkey to be shown to the
	user whereas the Entered parameter indicates how many characters
	the user has entered on the remote side.


New Identity Resolving Key Event
================================

	Event Code:		0x0018
	Controller Index:	<controller id>
	Event Parameters:	Store_Hint (1 Octet)
				Random_Address (6 Octets)
				Key {
					Address (6 Octets)
					Address_Type (1 Octet)
					Value (16 Octets)
				}

	This event indicates that a new identity resolving key has been
	generated for a remote device.

	The Store_Hint parameter indicates whether the host is expected
	to store the key persistently or not.

	The Random_Address provides the resolvable random address that
	was resolved into an identity. A value of 00:00:00:00:00:00
	indicates that the identity resolving key was provided for
	a public address or static random address.

	Once this event has been send for a resolvable random address,
	all further events mapping this device will send out using the
	identity address information.

	This event also indicates that now the identity address should
	be used for commands instead of the resolvable random address.

	Possible values for the Address_Type parameter:
		0	Reserved (not in use)
		1	LE Public
		2	LE Random

	The provided Address and Address_Type are the identity of
	a device. So either its public address or static random address.


New Signature Resolving Key Event
=================================

	Event Code:		0x0019
	Controller Index:	<controller id>
	Event Parameters:	Store_Hint (1 Octet)
				Key {
					Address (6 Octets)
					Address_Type (1 Octet)
					Master (1 Octet)
					Value (16 Octets)
				}

	This event indicates that a new signature resolving key has been
	generated for either the master or slave device.

	The Store_Hint parameter indicates whether the host is expected
	to store the key persistently or not.

	When the Master parameter is set to 0x01, then the signature
	resolving key from the remote peer device is provided. It is
	the key that is used for signature verification.

	When the Master parameter is set to 0x00, then it is the local
	signature resolving key that is used to sign data. The remote
	peer device will be using it for signature verification.

	The local signature resolving key will be generated with each
	pairing request. Only after receiving this event with Master
	parameter set to 0x00 it is possible to use ATT Signed Write
	procedures.

	Possible values for the Address_Type parameter:
		0	Reserved (not in use)
		1	LE Public
		2	LE Random

	The provided Address and Address_Type are the identity of
	a device. So either its public address or static random address.
