Coordinated Set Identification Service (CSIS)

Coordinated Set Identification Service (CSIS) More...

Data Structures
struct	bt_csis_cb
struct	bt_csis_register_param
struct	bt_csis_client_set_info
struct	bt_csis_client_csis_inst
	Struct representing a coordinated set instance on a remote device. More...
struct	bt_csis_client_set_member
struct	bt_csis_client_cb

Macros
#define	CSIS_CLIENT_DISCOVER_TIMER_VALUE   K_SECONDS(10)
#define	BT_CSIS_CLIENT_MAX_CSIS_INSTANCES   0
#define	BT_CSIS_READ_SIRK_REQ_RSP_ACCEPT   0x00
#define	BT_CSIS_READ_SIRK_REQ_RSP_ACCEPT_ENC   0x01
#define	BT_CSIS_READ_SIRK_REQ_RSP_REJECT   0x02
#define	BT_CSIS_READ_SIRK_REQ_RSP_OOB_ONLY   0x03
#define	BT_CSIS_SET_SIRK_SIZE   16
#define	BT_CSIS_RSI_SIZE   6
#define	BT_CSIS_ERROR_LOCK_DENIED   0x80
#define	BT_CSIS_ERROR_LOCK_RELEASE_DENIED   0x81
#define	BT_CSIS_ERROR_LOCK_INVAL_VALUE   0x82
#define	BT_CSIS_ERROR_SIRK_OOB_ONLY   0x83
#define	BT_CSIS_ERROR_LOCK_ALREADY_GRANTED   0x84
#define	BT_CSIS_DATA_RSI(_rsi)   BT_DATA(BT_DATA_CSIS_RSI, _rsi, BT_CSIS_RSI_SIZE)
	Helper to declare bt_data array including RSI. More...

Typedefs
typedef void(*	bt_csis_client_discover_cb) (struct bt_csis_client_set_member *member, int err, uint8_t set_count)
	Callback for discovering Coordinated Set Identification Services. More...
typedef void(*	bt_csis_client_lock_set_cb) (int err)
	Callback for locking a set across one or more devices. More...
typedef void(*	bt_csis_client_lock_changed_cb) (struct bt_csis_client_csis_inst *inst, bool locked)
	Callback when the lock value on a set of a connected device changes. More...
typedef void(*	bt_csis_client_ordered_access_cb_t) (const struct bt_csis_client_set_info *set_info, int err, bool locked, struct bt_csis_client_set_member *member)
	Callback for bt_csis_client_ordered_access() More...
typedef bool(*	bt_csis_client_ordered_access_t) (const struct bt_csis_client_set_info *set_info, struct bt_csis_client_set_member *members[], size_t count)
	Callback function definition for bt_csis_client_ordered_access() More...

Functions
void *	bt_csis_svc_decl_get (const struct bt_csis *csis)
	Get the service declaration attribute. More...
int	bt_csis_register (const struct bt_csis_register_param *param, struct bt_csis **csis)
	Register a Coordinated Set Identification Service instance. More...
void	bt_csis_print_sirk (const struct bt_csis *csis)
	Print the SIRK to the debug output. More...
int	bt_csis_generate_rsi (const struct bt_csis *csis, uint8_t rsi[6])
	Generate the Resolvable Set Identifier (RSI) value. More...
int	bt_csis_lock (struct bt_csis *csis, bool lock, bool force)
	Locks a specific Coordinated Set Identification Service instance on the server. More...
int	bt_csis_client_discover (struct bt_csis_client_set_member *member)
	Initialise the csis_client instance for a connection. This will do a discovery on the device and prepare the instance for following commands. More...
bool	bt_csis_client_is_set_member (uint8_t set_sirk[16], struct bt_data *data)
	Check if advertising data indicates a set member. More...
void	bt_csis_client_register_cb (struct bt_csis_client_cb *cb)
	Registers callbacks for csis_client. More...
int	bt_csis_client_ordered_access (struct bt_csis_client_set_member *members[], uint8_t count, const struct bt_csis_client_set_info *set_info, bt_csis_client_ordered_access_t cb)
	Access Coordinated Set devices in an ordered manner as a client. More...
int	bt_csis_client_lock (struct bt_csis_client_set_member **members, uint8_t count, const struct bt_csis_client_set_info *set_info)
	Lock an array of set members. More...
int	bt_csis_client_release (struct bt_csis_client_set_member **members, uint8_t count, const struct bt_csis_client_set_info *set_info)
	Release an array of set members. More...

Detailed Description

Coordinated Set Identification Service (CSIS)

Copyright (c) 2021 Nordic Semiconductor ASA

SPDX-License-Identifier: Apache-2.0

• [Experimental] Users should note that the APIs can change as a part of ongoing development.

Macro Definition Documentation

BT_CSIS_CLIENT_MAX_CSIS_INSTANCES

#define BT_CSIS_CLIENT_MAX_CSIS_INSTANCES   0

#include <include/zephyr/bluetooth/audio/csis.h>

BT_CSIS_DATA_RSI

#define BT_CSIS_DATA_RSI

(

_rsi

)

BT_DATA(BT_DATA_CSIS_RSI, _rsi, BT_CSIS_RSI_SIZE)

#include <include/zephyr/bluetooth/audio/csis.h>

Helper to declare bt_data array including RSI.

This macro is mainly for creating an array of struct bt_data elements which is then passed to e.g. bt_le_ext_adv_start().

Parameters

_rsi	Pointer to the RSI value

BT_CSIS_ERROR_LOCK_ALREADY_GRANTED

#define BT_CSIS_ERROR_LOCK_ALREADY_GRANTED   0x84

#include <include/zephyr/bluetooth/audio/csis.h>

Client is already owner of the lock

BT_CSIS_ERROR_LOCK_DENIED

#define BT_CSIS_ERROR_LOCK_DENIED   0x80

#include <include/zephyr/bluetooth/audio/csis.h>

Service is already locked

BT_CSIS_ERROR_LOCK_INVAL_VALUE

#define BT_CSIS_ERROR_LOCK_INVAL_VALUE   0x82

#include <include/zephyr/bluetooth/audio/csis.h>

Invalid lock value

BT_CSIS_ERROR_LOCK_RELEASE_DENIED

#define BT_CSIS_ERROR_LOCK_RELEASE_DENIED   0x81

#include <include/zephyr/bluetooth/audio/csis.h>

Service is not locked

BT_CSIS_ERROR_SIRK_OOB_ONLY

#define BT_CSIS_ERROR_SIRK_OOB_ONLY   0x83

#include <include/zephyr/bluetooth/audio/csis.h>

SIRK only available out-of-band

BT_CSIS_READ_SIRK_REQ_RSP_ACCEPT

#define BT_CSIS_READ_SIRK_REQ_RSP_ACCEPT   0x00

#include <include/zephyr/bluetooth/audio/csis.h>

Accept the request to read the SIRK as plaintext

BT_CSIS_READ_SIRK_REQ_RSP_ACCEPT_ENC

#define BT_CSIS_READ_SIRK_REQ_RSP_ACCEPT_ENC   0x01

#include <include/zephyr/bluetooth/audio/csis.h>

Accept the request to read the SIRK, but return encrypted SIRK

BT_CSIS_READ_SIRK_REQ_RSP_OOB_ONLY

#define BT_CSIS_READ_SIRK_REQ_RSP_OOB_ONLY   0x03

#include <include/zephyr/bluetooth/audio/csis.h>

SIRK is available only via an OOB procedure

BT_CSIS_READ_SIRK_REQ_RSP_REJECT

#define BT_CSIS_READ_SIRK_REQ_RSP_REJECT   0x02

#include <include/zephyr/bluetooth/audio/csis.h>

Reject the request to read the SIRK

BT_CSIS_RSI_SIZE

#define BT_CSIS_RSI_SIZE   6

#include <include/zephyr/bluetooth/audio/csis.h>

Size of the Resolvable Set Identifier (RSI)

BT_CSIS_SET_SIRK_SIZE

#define BT_CSIS_SET_SIRK_SIZE   16

#include <include/zephyr/bluetooth/audio/csis.h>

Size of the Set Identification Resolving Key (SIRK)

CSIS_CLIENT_DISCOVER_TIMER_VALUE

#define CSIS_CLIENT_DISCOVER_TIMER_VALUE   K_SECONDS(10)

#include <include/zephyr/bluetooth/audio/csis.h>

Recommended timer for member discovery

Typedef Documentation

bt_csis_client_discover_cb

bt_csis_client_discover_cb

#include <include/zephyr/bluetooth/audio/csis.h>

Callback for discovering Coordinated Set Identification Services.

Parameters

member	Pointer to the set member.
err	0 on success, or an errno value on error.
set_count	Number of sets on the member.

bt_csis_client_lock_changed_cb

bt_csis_client_lock_changed_cb

#include <include/zephyr/bluetooth/audio/csis.h>

Callback when the lock value on a set of a connected device changes.

Parameters

inst	The Coordinated Set Identification Service instance that was changed.
locked	Whether the lock is locked or release.

Returns

int Return 0 on success, or an errno value on error.

bt_csis_client_lock_set_cb

bt_csis_client_lock_set_cb

#include <include/zephyr/bluetooth/audio/csis.h>

Callback for locking a set across one or more devices.

Parameters

err	0 on success, or an errno value on error.

bt_csis_client_ordered_access_cb_t

bt_csis_client_ordered_access_cb_t

#include <include/zephyr/bluetooth/audio/csis.h>

Callback for bt_csis_client_ordered_access()

If any of the set members supplied to bt_csis_client_ordered_access() is in the locked state, this will be called with locked true and member will be the locked member, and the ordered access procedure is cancelled. Likewise, if any error occurs, the procedure will also be aborted.

Parameters

set_info	Pointer to the a specific set_info struct.
err	Error value. 0 on success, GATT error or errno on fail.
locked	Whether the lock is locked or release.
member	The locked member if locked is true, otherwise NULL.

bt_csis_client_ordered_access_t

typedef bool(* bt_csis_client_ordered_access_t) (const struct bt_csis_client_set_info *set_info, struct bt_csis_client_set_member *members[], size_t count)

#include <include/zephyr/bluetooth/audio/csis.h>

Callback function definition for bt_csis_client_ordered_access()

Parameters

set_info	Pointer to the a specific set_info struct.
members	Array of members ordered by rank. The procedure shall be done on the members in ascending order.
count	Number of members in members.

Returns

true if the procedures can be successfully done, or false to stop the procedure.

Function Documentation

bt_csis_client_discover()

int bt_csis_client_discover

(

struct bt_csis_client_set_member *

member

)

#include <include/zephyr/bluetooth/audio/csis.h>

Initialise the csis_client instance for a connection. This will do a discovery on the device and prepare the instance for following commands.

Parameters

member

Pointer to a set member struct to store discovery results in.

Returns

int Return 0 on success, or an errno value on error.

bt_csis_client_is_set_member()

bool bt_csis_client_is_set_member	(	uint8_t	set_sirk[16],
		struct bt_data *	data
	)

#include <include/zephyr/bluetooth/audio/csis.h>

Check if advertising data indicates a set member.

Parameters

set_sirk	The SIRK of the set to check against
data	The advertising data

Returns

true if the advertising data indicates a set member, false otherwise

bt_csis_client_lock()

int bt_csis_client_lock	(	struct bt_csis_client_set_member **	members,
		uint8_t	count,
		const struct bt_csis_client_set_info *	set_info
	)

#include <include/zephyr/bluetooth/audio/csis.h>

Lock an array of set members.

The members will be locked starting from lowest rank going up.

TODO: If locking fails, the already locked members will not be unlocked.

Parameters

members	Array of set members to lock.
count	Number of set members in members.
set_info	Pointer to the a specific set_info struct, as a member may be part of multiple sets.

Returns

Return 0 on success, or an errno value on error.

bt_csis_client_ordered_access()

int bt_csis_client_ordered_access	(	struct bt_csis_client_set_member *	members[],
		uint8_t	count,
		const struct bt_csis_client_set_info *	set_info,
		bt_csis_client_ordered_access_t	cb
	)

#include <include/zephyr/bluetooth/audio/csis.h>

Access Coordinated Set devices in an ordered manner as a client.

This function will read the lock state of all devices and if all devices are in the unlocked state, then cb will be called with the same members as provided by members, but where the members are ordered by rank (if present). Once this procedure is finished or an error occurs, bt_csis_client_cb::ordered_access will be called.

This procedure only works if all the members have the lock characterstic, and all either has rank = 0 or unique ranks.

If any of the members are in the locked state, the procedure will be cancelled.

This can only be done on members that are bonded.

Parameters

members	Array of set members to access.
count	Number of set members in members.
set_info	Pointer to the a specific set_info struct, as a member may be part of multiple sets.
cb	The callback function to be called for each member.

bt_csis_client_register_cb()

void bt_csis_client_register_cb

(

struct bt_csis_client_cb *

cb

)

#include <include/zephyr/bluetooth/audio/csis.h>

Registers callbacks for csis_client.

Parameters

cb	Pointer to the callback structure.

bt_csis_client_release()

int bt_csis_client_release	(	struct bt_csis_client_set_member **	members,
		uint8_t	count,
		const struct bt_csis_client_set_info *	set_info
	)

#include <include/zephyr/bluetooth/audio/csis.h>

Release an array of set members.

The members will be released starting from highest rank going down.

Parameters

members	Array of set members to lock.
count	Number of set members in members.
set_info	Pointer to the a specific set_info struct, as a member may be part of multiple sets.

Returns

Return 0 on success, or an errno value on error.

bt_csis_generate_rsi()

int bt_csis_generate_rsi	(	const struct bt_csis *	csis,
		uint8_t	rsi[6]
	)

#include <include/zephyr/bluetooth/audio/csis.h>

Generate the Resolvable Set Identifier (RSI) value.

This will generate RSI for given csis instance.

Parameters

csis	Pointer to the Coordinated Set Identification Service.
rsi	Pointer to the 6-octet newly generated RSI data.

Returns

int 0 if on success, errno on error.

bt_csis_lock()

int bt_csis_lock	(	struct bt_csis *	csis,
		bool	lock,
		bool	force
	)

#include <include/zephyr/bluetooth/audio/csis.h>

Locks a specific Coordinated Set Identification Service instance on the server.

Parameters

csis	Pointer to the Coordinated Set Identification Service.
lock	If true lock the set, if false release the set.
force	This argument only have meaning when lock is false (release) and will force release the lock, regardless of who took the lock.

Returns

0 on success, GATT error on error.

bt_csis_print_sirk()

void bt_csis_print_sirk

(

const struct bt_csis *

csis

)

#include <include/zephyr/bluetooth/audio/csis.h>

Print the SIRK to the debug output.

Parameters

csis	Pointer to the Coordinated Set Identification Service.

bt_csis_register()

int bt_csis_register	(	const struct bt_csis_register_param *	param,
		struct bt_csis **	csis
	)

#include <include/zephyr/bluetooth/audio/csis.h>

Register a Coordinated Set Identification Service instance.

This will register and enable the service and make it discoverable by clients.

This shall only be done as a server.

Parameters

	param	Coordinated Set Identification Service register parameters.
[out]	csis	Pointer to the registered Coordinated Set Identification Service.

Returns

0 if success, errno on failure.

bt_csis_svc_decl_get()

void * bt_csis_svc_decl_get

(

const struct bt_csis *

csis

)

#include <include/zephyr/bluetooth/audio/csis.h>

Get the service declaration attribute.

The first service attribute can be included in any other GATT service.

Parameters

csis	Pointer to the Coordinated Set Identification Service.

Returns

The first CSIS attribute instance.