Public APIs for Bluetooth Telephone Bearer Service. More...

#include <stdint.h>
#include <stdbool.h>
#include <zephyr/bluetooth/conn.h>
#include <zephyr/sys/slist.h>
#include <zephyr/sys/util_macro.h>

Data Structures
struct	bt_tbs_cb
	Struct to hold the Telephone Bearer Service callbacks. More...

struct	bt_tbs_client_call_state
	Struct to hold a call state. More...

struct	bt_tbs_client_call
	Struct to hold a call as the Telephone Bearer Service client. More...

struct	bt_tbs_client_cb
	Struct to hold the Telephone Bearer Service client callbacks. More...

Macros
#define	BT_TBS_GTBS_INDEX 0xFF
	The GTBS index denotes whenever a callback is from a Generic Telephone Bearer Service (GTBS) instance, or whenever the client should perform on action on the GTBS instance of the server, rather than any of the specific Telephone Bearer Service instances.

Call States
#define	BT_TBS_CALL_STATE_INCOMING 0x00
	A remote party is calling (incoming call).

#define	BT_TBS_CALL_STATE_DIALING 0x01
	The process to call the remote party has started on the server, but the remote party is not being alerted (outgoing call).

#define	BT_TBS_CALL_STATE_ALERTING 0x02
	A remote party is being alerted (outgoing call).

#define	BT_TBS_CALL_STATE_ACTIVE 0x03
	The call is in an active conversation.

#define	BT_TBS_CALL_STATE_LOCALLY_HELD 0x04
	The call is connected but held locally.

#define	BT_TBS_CALL_STATE_REMOTELY_HELD 0x05
	The call is connected but held remotely.

#define	BT_TBS_CALL_STATE_LOCALLY_AND_REMOTELY_HELD 0x06
	The call is connected but held both locally and remotely.

Terminate Reason
#define	BT_TBS_REASON_BAD_REMOTE_URI 0x00
	The URI value used to originate a call was formed improperly.

#define	BT_TBS_REASON_CALL_FAILED 0x01
	The call failed.

#define	BT_TBS_REASON_REMOTE_ENDED_CALL 0x02
	The remote party ended the call.

#define	BT_TBS_REASON_SERVER_ENDED_CALL 0x03
	The call ended from the server.

#define	BT_TBS_REASON_LINE_BUSY 0x04
	The line was busy.

#define	BT_TBS_REASON_NETWORK_CONGESTED 0x05
	Network congestion.

#define	BT_TBS_REASON_CLIENT_TERMINATED 0x06
	The client terminated the call.

#define	BT_TBS_REASON_NO_SERVICE 0x07
	No service.

#define	BT_TBS_REASON_NO_ANSWER 0x08
	No answer.

#define	BT_TBS_REASON_UNSPECIFIED 0x09
	Unspecified.

Control point error codes
#define	BT_TBS_RESULT_CODE_SUCCESS 0x00
	The opcode write was successful.

#define	BT_TBS_RESULT_CODE_OPCODE_NOT_SUPPORTED 0x01
	An invalid opcode was used for the Call Control Point write.

#define	BT_TBS_RESULT_CODE_OPERATION_NOT_POSSIBLE 0x02
	The requested operation cannot be completed.

#define	BT_TBS_RESULT_CODE_INVALID_CALL_INDEX 0x03
	The Call Index used for the Call Control Point write is invalid.

#define	BT_TBS_RESULT_CODE_STATE_MISMATCH 0x04
	The opcode written to the Call Control Point was received when the current Call State for the Call Index was not in the expected state.

#define	BT_TBS_RESULT_CODE_OUT_OF_RESOURCES 0x05
	Lack of internal resources to complete the requested action.

#define	BT_TBS_RESULT_CODE_INVALID_URI 0x06
	The Outgoing URI is incorrect or invalid when an Originate opcode is sent.

Optional feature bits
Optional features that can be supported. See bt_tbs_client_read_optional_opcodes() on how to read these from a remote device
#define	BT_TBS_FEATURE_HOLD BIT(0)
	Local Hold and Local Retrieve Call Control Point Opcodes supported.

#define	BT_TBS_FEATURE_JOIN BIT(1)
	Join Call Control Point Opcode supported.

Signal strength value limits
#define	BT_TBS_SIGNAL_STRENGTH_NO_SERVICE 0
	No service.

#define	BT_TBS_SIGNAL_STRENGTH_MAX 100
	Maximum signal strength.

#define	BT_TBS_SIGNAL_STRENGTH_UNKNOWN 255
	Signal strength is unknown

Bearer Technology
#define	BT_TBS_TECHNOLOGY_3G 0x01
	3G

#define	BT_TBS_TECHNOLOGY_4G 0x02
	4G

#define	BT_TBS_TECHNOLOGY_LTE 0x03
	Long-term evolution (LTE)

#define	BT_TBS_TECHNOLOGY_WIFI 0x04
	Wifi.

#define	BT_TBS_TECHNOLOGY_5G 0x05
	5G

#define	BT_TBS_TECHNOLOGY_GSM 0x06
	Global System for Mobile Communications (GSM)

#define	BT_TBS_TECHNOLOGY_CDMA 0x07
	Code-Division Multiple Access (CDMA)

#define	BT_TBS_TECHNOLOGY_2G 0x08
	2G

#define	BT_TBS_TECHNOLOGY_WCDMA 0x09
	Wideband Code-Division Multiple Access (WCDMA)

Call status flags bitfield
#define	BT_TBS_STATUS_FLAG_INBAND_RINGTONE BIT(0)
	Inband ringtone enabled.

#define	BT_TBS_STATUS_FLAG_SILENT_MOD BIT(1)
	Server is in silent mod.

Call flags bitfield
#define	BT_TBS_CALL_FLAG_OUTGOING BIT(0)
	If set, call is outgoing else incoming.

#define	BT_TBS_CALL_FLAG_WITHHELD BIT(1)
	If set call is withheld, else not withheld.

#define	BT_TBS_CALL_FLAG_WITHHELD_BY_NETWORK BIT(2)
	If set call is withheld by network, else provided by network.

Typedefs
typedef bool(*	bt_tbs_originate_call_cb) (struct bt_conn conn, uint8_t call_index, const char uri)
	Callback function for client originating a call.

typedef void(*	bt_tbs_terminate_call_cb) (struct bt_conn *conn, uint8_t call_index, uint8_t reason)
	Callback function for client terminating a call.

typedef void(*	bt_tbs_join_calls_cb) (struct bt_conn conn, uint8_t call_index_count, const uint8_t call_indexes)
	Callback function for client joining calls.

typedef void(*	bt_tbs_call_change_cb) (struct bt_conn *conn, uint8_t call_index)
	Callback function for client request call state change.

typedef bool(*	bt_tbs_authorize_cb) (struct bt_conn *conn)
	Callback function for authorizing a client.

typedef void(*	bt_tbs_client_discover_cb) (struct bt_conn *conn, int err, uint8_t tbs_count, bool gtbs_found)
	Callback function for ccp_discover.

typedef void(*	bt_tbs_client_write_value_cb) (struct bt_conn *conn, int err, uint8_t inst_index)
	Callback function for writing values to peer device.

typedef void(*	bt_tbs_client_cp_cb) (struct bt_conn *conn, int err, uint8_t inst_index, uint8_t call_index)
	Callback function for the CCP call control functions.

typedef void(*	bt_tbs_client_read_string_cb) (struct bt_conn conn, int err, uint8_t inst_index, const char value)
	Callback function for functions that read a string value.

typedef void(*	bt_tbs_client_read_value_cb) (struct bt_conn *conn, int err, uint8_t inst_index, uint32_t value)
	Callback function for functions that read an integer value.

typedef void(*	bt_tbs_client_termination_reason_cb) (struct bt_conn *conn, int err, uint8_t inst_index, uint8_t call_index, uint8_t reason)
	Callback function for ccp_read_termination_reason.

typedef void(*	bt_tbs_client_current_calls_cb) (struct bt_conn conn, int err, uint8_t inst_index, uint8_t call_count, const struct bt_tbs_client_call calls)
	Callback function for ccp_read_current_calls.

typedef void(*	bt_tbs_client_call_states_cb) (struct bt_conn conn, int err, uint8_t inst_index, uint8_t call_count, const struct bt_tbs_client_call_state call_states)
	Callback function for ccp_read_call_state.

Functions
int	bt_tbs_accept (uint8_t call_index)
	Accept an alerting call.

int	bt_tbs_hold (uint8_t call_index)
	Hold a call.

int	bt_tbs_retrieve (uint8_t call_index)
	Retrieve a call.

int	bt_tbs_terminate (uint8_t call_index)
	Terminate a call.

int	bt_tbs_originate (uint8_t bearer_index, char uri, uint8_t call_index)
	Originate a call.

int	bt_tbs_join (uint8_t call_index_cnt, uint8_t *call_indexes)
	Join calls.

int	bt_tbs_remote_answer (uint8_t call_index)
	Notify the server that the remote party answered the call.

int	bt_tbs_remote_hold (uint8_t call_index)
	Notify the server that the remote party held the call.

int	bt_tbs_remote_retrieve (uint8_t call_index)
	Notify the server that the remote party retrieved the call.

int	bt_tbs_remote_terminate (uint8_t call_index)
	Notify the server that the remote party terminated the call.

int	bt_tbs_remote_incoming (uint8_t bearer_index, const char to, const char from, const char *friendly_name)
	Notify the server of an incoming call.

int	bt_tbs_set_bearer_provider_name (uint8_t bearer_index, const char *name)
	Set a new bearer provider.

int	bt_tbs_set_bearer_technology (uint8_t bearer_index, uint8_t new_technology)
	Set a new bearer technology.

int	bt_tbs_set_signal_strength (uint8_t bearer_index, uint8_t new_signal_strength)
	Update the signal strength reported by the server.

int	bt_tbs_set_status_flags (uint8_t bearer_index, uint16_t status_flags)
	Sets the feature and status value.

int	bt_tbs_set_uri_scheme_list (uint8_t bearer_index, const char **uri_list, uint8_t uri_count)
	Sets the URI scheme list of a bearer.

void	bt_tbs_register_cb (struct bt_tbs_cb *cbs)
	Register the callbacks for TBS.

void	bt_tbs_dbg_print_calls (void)
	Prints all calls of all services to the debug log.

int	bt_tbs_client_discover (struct bt_conn *conn)
	Discover TBS for a connection.

int	bt_tbs_client_set_outgoing_uri (struct bt_conn conn, uint8_t inst_index, const char uri)
	Set the outgoing URI for a TBS instance on the peer device.

int	bt_tbs_client_set_signal_strength_interval (struct bt_conn *conn, uint8_t inst_index, uint8_t interval)
	Set the signal strength reporting interval for a TBS instance.

int	bt_tbs_client_originate_call (struct bt_conn conn, uint8_t inst_index, const char uri)
	Request to originate a call.

int	bt_tbs_client_terminate_call (struct bt_conn *conn, uint8_t inst_index, uint8_t call_index)
	Request to terminate a call.

int	bt_tbs_client_hold_call (struct bt_conn *conn, uint8_t inst_index, uint8_t call_index)
	Request to hold a call.

int	bt_tbs_client_accept_call (struct bt_conn *conn, uint8_t inst_index, uint8_t call_index)
	Accept an incoming call.

int	bt_tbs_client_retrieve_call (struct bt_conn *conn, uint8_t inst_index, uint8_t call_index)
	Retrieve call from (local) hold.

int	bt_tbs_client_join_calls (struct bt_conn conn, uint8_t inst_index, const uint8_t call_indexes, uint8_t count)
	Join multiple calls.

int	bt_tbs_client_read_bearer_provider_name (struct bt_conn *conn, uint8_t inst_index)
	Read the bearer provider name of a TBS instance.

int	bt_tbs_client_read_bearer_uci (struct bt_conn *conn, uint8_t inst_index)
	Read the UCI of a TBS instance.

int	bt_tbs_client_read_technology (struct bt_conn *conn, uint8_t inst_index)
	Read the technology of a TBS instance.

int	bt_tbs_client_read_uri_list (struct bt_conn *conn, uint8_t inst_index)
	Read the URI schemes list of a TBS instance.

int	bt_tbs_client_read_signal_strength (struct bt_conn *conn, uint8_t inst_index)
	Read the current signal strength of a TBS instance.

int	bt_tbs_client_read_signal_interval (struct bt_conn *conn, uint8_t inst_index)
	Read the signal strength reporting interval of a TBS instance.

int	bt_tbs_client_read_current_calls (struct bt_conn *conn, uint8_t inst_index)
	Read the list of current calls of a TBS instance.

int	bt_tbs_client_read_ccid (struct bt_conn *conn, uint8_t inst_index)
	Read the content ID of a TBS instance.

int	bt_tbs_client_read_call_uri (struct bt_conn *conn, uint8_t inst_index)
	Read the call target URI of a TBS instance.

int	bt_tbs_client_read_status_flags (struct bt_conn *conn, uint8_t inst_index)
	Read the feature and status value of a TBS instance.

int	bt_tbs_client_read_call_state (struct bt_conn *conn, uint8_t inst_index)
	Read the states of the current calls of a TBS instance.

int	bt_tbs_client_read_remote_uri (struct bt_conn *conn, uint8_t inst_index)
	Read the remote URI of a TBS instance.

int	bt_tbs_client_read_friendly_name (struct bt_conn *conn, uint8_t inst_index)
	Read the friendly name of a call for a TBS instance.

int	bt_tbs_client_read_optional_opcodes (struct bt_conn *conn, uint8_t inst_index)
	Read the supported opcode of a TBS instance.

int	bt_tbs_client_register_cb (struct bt_tbs_client_cb *cbs)
	Register the callbacks for CCP.

struct bt_tbs_instance *	bt_tbs_client_get_by_ccid (const struct bt_conn *conn, uint8_t ccid)
	Look up Telephone Bearer Service instance by CCID.

Detailed Description

Public APIs for Bluetooth Telephone Bearer Service.

SPDX-License-Identifier: Apache-2.0

Data Structures

Macros

Typedefs

Functions

Detailed Description