xref: /btstack/src/gap.h (revision aacb1081b47e305a2a81c7e7330903da74309100)

/*
 * Copyright (C) 2014 BlueKitchen GmbH
 *
 * Redistribution and use in source and binary forms, with or without
 * modification, are permitted provided that the following conditions
 * are met:
 *
 * 1. Redistributions of source code must retain the above copyright
 *    notice, this list of conditions and the following disclaimer.
 * 2. Redistributions in binary form must reproduce the above copyright
 *    notice, this list of conditions and the following disclaimer in the
 *    documentation and/or other materials provided with the distribution.
 * 3. Neither the name of the copyright holders nor the names of
 *    contributors may be used to endorse or promote products derived
 *    from this software without specific prior written permission.
 * 4. Any redistribution, use, or modification is done solely for
 *    personal benefit and not for any commercial purpose or for
 *    monetary gain.
 *
 * THIS SOFTWARE IS PROVIDED BY BLUEKITCHEN GMBH AND CONTRIBUTORS
 * ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
 * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS
 * FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL BLUEKITCHEN
 * GMBH OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT,
 * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING,
 * BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS
 * OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED
 * AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY,
 * OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF
 * THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
 * SUCH DAMAGE.
 *
 * Please inquire about commercial licensing options at
 * [email protected]
 *
 */

/**
 * @title Genral Access Profile (GAP)
 *
 */

#ifndef GAP_H
#define GAP_H

#if defined __cplusplus
extern "C" {
#endif

#include "btstack_defines.h"
#include "btstack_util.h"

#ifdef ENABLE_CLASSIC
#include "classic/btstack_link_key_db.h"
#endif

// BIG has up to 2 BIS (stereo)
#ifndef MAX_NR_BIS
#define MAX_NR_BIS 2
#endif

typedef enum {

	// MITM protection not required
	// No encryption required
	// No user interaction required
	LEVEL_0 = 0,

	// MITM protection not required
	// No encryption required
	// Minimal user interaction desired
	LEVEL_1,

	// MITM protection not required
	// Encryption required
	LEVEL_2,

	// MITM protection required
	// Encryption required
	// User interaction acceptable
	LEVEL_3,

	// MITM protection required
	// Encryption required
	// 128-bit equivalent strength for link and encryption keys required (P-192 is not enough)
	// User interaction acceptable
	LEVEL_4,
} gap_security_level_t;


typedef enum {
    // non-secure
    GAP_SECURITY_MODE_1 = 1,

    // service level enforced security
    GAP_SECURITY_MODE_2,

    // link level enforced security
    GAP_SECURITY_MODE_3,

    // service level enforced security
    GAP_SECURITY_MODE_4
} gap_security_mode_t;

typedef enum {
	GAP_SECURITY_NONE,
	GAP_SECURITY_ENCRYPTED,		// SSP: JUST WORKS
	GAP_SECURITY_AUTHENTICATED, // SSP: numeric comparison, passkey, OOB
	// GAP_SECURITY_AUTHORIZED
} gap_security_state;

typedef enum {
	GAP_CONNECTION_INVALID,
	GAP_CONNECTION_ACL,
	GAP_CONNECTION_SCO,
	GAP_CONNECTION_LE
} gap_connection_type_t;

typedef struct le_connection_parameter_range{
    uint16_t le_conn_interval_min;
    uint16_t le_conn_interval_max;
    uint16_t le_conn_latency_min;
    uint16_t le_conn_latency_max;
    uint16_t le_supervision_timeout_min;
    uint16_t le_supervision_timeout_max;
} le_connection_parameter_range_t;

typedef enum {
    GAP_RANDOM_ADDRESS_TYPE_OFF = 0,
    GAP_RANDOM_ADDRESS_TYPE_STATIC,
    GAP_RANDOM_ADDRESS_NON_RESOLVABLE,
    GAP_RANDOM_ADDRESS_RESOLVABLE,
} gap_random_address_type_t;

// Authorization state
typedef enum {
    AUTHORIZATION_UNKNOWN,
    AUTHORIZATION_PENDING,
    AUTHORIZATION_DECLINED,
    AUTHORIZATION_GRANTED
} authorization_state_t;

// Extended Advertising Parameters
typedef struct {
    uint16_t        advertising_event_properties;
    uint16_t        primary_advertising_interval_min;
    uint16_t        primary_advertising_interval_max;
    uint8_t         primary_advertising_channel_map;
    bd_addr_type_t  own_address_type;
    bd_addr_type_t  peer_address_type;
    bd_addr_t       peer_address;
    uint8_t         advertising_filter_policy;
    int8_t          advertising_tx_power;
    uint8_t         primary_advertising_phy;
    uint8_t         secondary_advertising_max_skip;
    uint8_t         secondary_advertising_phy;
    uint8_t         advertising_sid;
    uint8_t         scan_request_notification_enable;
} le_extended_advertising_parameters_t;

typedef struct {
    uint16_t  periodic_advertising_interval_min;
    uint16_t  periodic_advertising_interval_max;
    uint16_t  periodic_advertising_properties;
} le_periodic_advertising_parameters_t;

// Extended Advertising Set State
typedef struct {
    btstack_linked_item_t item;
    le_extended_advertising_parameters_t extended_params;
    le_periodic_advertising_parameters_t periodic_params;
    bd_addr_t random_address;
    const uint8_t * adv_data;
    const uint8_t * scan_data;
    const uint8_t * periodic_data;
    uint16_t  adv_data_len;
    uint16_t  scan_data_len;
    uint16_t  periodic_data_len;
    uint16_t  adv_data_pos;
    uint16_t  scan_data_pos;
    uint16_t  periodic_data_pos;
    uint16_t  enable_timeout;
    uint8_t   advertising_handle;
    uint8_t   enable_max_scan_events;
    bool      periodic_include_adi;
    uint8_t   state;
    uint8_t   tasks;
} le_advertising_set_t;

// Isochronous Streams

// -- Broadcast Isochronous Group BIG

typedef struct {
    uint8_t  big_handle;
    uint8_t  advertising_handle;
    uint8_t  num_bis;
    uint32_t sdu_interval_us;
    uint16_t max_sdu;
    uint16_t max_transport_latency_ms;
    uint8_t  rtn;
    uint8_t  phy;
    uint8_t  packing;
    uint8_t  framing;
    uint8_t  encryption;
    uint8_t  broadcast_code[16];
} le_audio_big_params_t;

typedef struct {
    uint8_t  big_handle;
    uint8_t  sync_handle;
    uint8_t  encryption;
    uint8_t  broadcast_code[16];
    uint8_t  mse;
    uint16_t big_sync_timeout_10ms;
    uint8_t  num_bis;
    uint8_t bis_indices[MAX_NR_BIS];
} le_audio_big_sync_params_t;

typedef enum {
    LE_AUDIO_BIG_STATE_CREATE,
    LE_AUDIO_BIG_STATE_W4_ESTABLISHED,
    LE_AUDIO_BIG_STATE_SETUP_ISO_PATH,
    LE_AUDIO_BIG_STATE_W4_SETUP_ISO_PATH,
    LE_AUDIO_BIG_STATE_W4_SETUP_ISO_PATH_THEN_TERMINATE,
    LE_AUDIO_BIG_STATE_SETUP_ISO_PATHS_FAILED,
    LE_AUDIO_BIG_STATE_ACTIVE,
    LE_AUDIO_BIG_STATE_TERMINATE,
    LE_AUDIO_BIG_STATE_W4_TERMINATED_AFTER_SETUP_FAILED,
    LE_AUDIO_BIG_STATE_W4_TERMINATED,
} le_audio_big_state_t;

typedef struct {
	btstack_linked_item_t item;
    uint8_t big_handle;
    le_audio_big_state_t state;
    union {
        uint8_t next_bis;
        uint8_t status;
    } state_vars;
    uint8_t num_bis;
    hci_con_handle_t bis_con_handles[MAX_NR_BIS];
    const le_audio_big_params_t * params;
    // request to send
    bool can_send_now_requested;
    // previous and current timestamp of number completed event to track ISO intervals
    bool     num_completed_timestamp_previous_valid;
    bool     num_completed_timestamp_current_valid;
    uint32_t num_completed_timestamp_previous_ms;
    uint32_t num_completed_timestamp_current_ms;

} le_audio_big_t;

typedef struct {
    btstack_linked_item_t  item;
    uint8_t big_handle;
    le_audio_big_state_t   state;
    union {
        uint8_t next_bis;
        uint8_t status;
    } state_vars;
    uint8_t num_bis;
    hci_con_handle_t bis_con_handles[MAX_NR_BIS];
    const le_audio_big_sync_params_t * params;
} le_audio_big_sync_t;

/* API_START */

// Classic + LE

/**
 * @brief Read RSSI
 * @param con_handle
 * @events: GAP_EVENT_RSSI_MEASUREMENT
 */
int gap_read_rssi(hci_con_handle_t con_handle);


/**
 * @brief Gets local address.
 */
void gap_local_bd_addr(bd_addr_t address_buffer);

/**
 * @brief Disconnect connection with handle
 * @param handle
 */
uint8_t gap_disconnect(hci_con_handle_t handle);

/**
 * @brief Get connection type
 * @param con_handle
 * @result connection_type
 */
gap_connection_type_t gap_get_connection_type(hci_con_handle_t connection_handle);

/**
 * @brief Get HCI connection role
 * @param con_handle
 * @result hci_role_t HCI_ROLE_MASTER / HCI_ROLE_SLAVE / HCI_ROLE_INVALID (if connection does not exist)
 */
hci_role_t gap_get_role(hci_con_handle_t connection_handle);

// Classic

/**
 * @brief Request role switch
 * @note this only requests the role switch. A HCI_EVENT_ROLE_CHANGE is emitted and its status field will indicate if the switch was succesful
 * @param addr
 * @param hci_role_t HCI_ROLE_MASTER / HCI_ROLE_SLAVE
 * @result status
 */
uint8_t gap_request_role(const bd_addr_t addr, hci_role_t role);

/**
 * @brief Sets local name.
 * @note Default name is 'BTstack 00:00:00:00:00:00'
 * @note '00:00:00:00:00:00' in local_name will be replaced with actual bd addr
 * @param name is not copied, make sure memory stays valid
 */
void gap_set_local_name(const char * local_name);

/**
 * @brief Set Extended Inquiry Response data
 * @note If not set, local name will be used for EIR data (see gap_set_local_name)
 * @note '00:00:00:00:00:00' in local_name will be replaced with actual bd addr
 * @param eir_data size HCI_EXTENDED_INQUIRY_RESPONSE_DATA_LEN (240) bytes, is not copied make sure memory stays valid
 */
void gap_set_extended_inquiry_response(const uint8_t * data);

/**
 * @brief Set class of device
 */
void gap_set_class_of_device(uint32_t class_of_device);

/**
 * @brief Set default link policy settings for all classic ACL links
 * @param default_link_policy_settings - see LM_LINK_POLICY_* in bluetooth.h
 * @note common value: LM_LINK_POLICY_ENABLE_ROLE_SWITCH | LM_LINK_POLICY_ENABLE_SNIFF_MODE to enable role switch and sniff mode
 */
void gap_set_default_link_policy_settings(uint16_t default_link_policy_settings);

/**
 * @brief Set Allow Role Switch param for outgoing classic ACL links
 * @param allow_role_switch - true: allow remote device to request role switch, false: stay master
 */
void gap_set_allow_role_switch(bool allow_role_switch);

/**
 * @brief Set  link supervision timeout for outgoing classic ACL links
 * @param default_link_supervision_timeout * 0.625 ms, default 0x7d00 = 20 seconds, 0 = no link supervision timeout
 */
void gap_set_link_supervision_timeout(uint16_t link_supervision_timeout);

/**
 * @brief Enable link watchdog. If no ACL packet is sent within timeout_ms, the link will get disconnected
 * note: current implementation uses the automatic flush timeout controller feature with a max timeout of 1.28s
 * @param timeout_ms
 */
void gap_enable_link_watchdog(uint16_t timeout_ms);

/**
 * @brief Enable/disable bonding. Default is enabled.
 * @param enabled
 */
void gap_set_bondable_mode(int enabled);

/**
 * @brief Get bondable mode.
 * @return 1 if bondable
 */
int gap_get_bondable_mode(void);

/**
 * @brief Set security mode for all outgoing and incoming connections. Default: GAP_SECURITY_MODE_4
 * @param security_mode is GAP_SECURITY_MODE_2 or GAP_SECURITY_MODE_4
 * @return status ERROR_CODE_SUCCESS or ERROR_CODE_UNSUPPORTED_FEATURE_OR_PARAMETER_VALUE
 */
uint8_t gap_set_security_mode(gap_security_mode_t security_mode);

/**
 * @brief Get security mode
 * @return security_mode
 */
gap_security_mode_t gap_get_security_mode(void);

/**
 * @brief Set security level for all outgoing and incoming connections. Default: LEVEL_2
 * @param security_level
 * @note has to be called before services or profiles are initialized
 */
void gap_set_security_level(gap_security_level_t security_level);

/**
 * @brief Get security level
 * @return security_level
 */
gap_security_level_t gap_get_security_level(void);

/**
 * @brief Set Secure Connections Only Mode for BR/EDR (Classic) Default: false
 * @param enable
 */
void gap_set_secure_connections_only_mode(bool enable);

/**
 * @breif Get Secure Connections Only Mode
 * @param enabled
 */
bool gap_get_secure_connections_only_mode(void);

/**
 * @brief Set minimal security level for registered services
 * @param security_level
 * @note Called by L2CAP based on registered services
 */
void gap_set_minimal_service_security_level(gap_security_level_t security_level);

/**
 * @brief Register filter for rejecting classic connections. Callback will return 1 accept connection, 0 on reject.
 */
void gap_register_classic_connection_filter(int (*accept_callback)(bd_addr_t addr, hci_link_type_t link_type));

/* Configure Secure Simple Pairing */

/**
 * @brief Enable will enable SSP during init. Default: true
 */
void gap_ssp_set_enable(int enable);

/**
 * @brief Set IO Capability. BTstack will return capability to SSP requests
 */
void gap_ssp_set_io_capability(int ssp_io_capability);

/**
 * @brief Set Authentication Requirements using during SSP
 */
void gap_ssp_set_authentication_requirement(int authentication_requirement);

/**
 * @brief Enable/disable Secure Connections. Default: true if supported by Controller
 */
void gap_secure_connections_enable(bool enable);

/**
 * @brief Query if Secure Connections can be used for Classic connections.
 * @note Requires gap_secure_connections_enable == true and Controller to support it
 */
bool gap_secure_connections_active(void);

/**
 * @brief If set, BTstack will confirm a numeric comparison and enter '000000' if requested.
 */
void gap_ssp_set_auto_accept(int auto_accept);

/**
 * @brief Set required encryption key size for GAP Levels 1-3 on ccassic connections. Default: 16 bytes
 * @param encryption_key_size in bytes. Valid 7..16
 */
void gap_set_required_encryption_key_size(uint8_t encryption_key_size);

/**
 * @brief Start dedicated bonding with device. Disconnect after bonding.
 * @param device
 * @param request MITM protection
 * @return error, if max num acl connections active
 * @result GAP_DEDICATED_BONDING_COMPLETE
 */
int gap_dedicated_bonding(bd_addr_t device, int mitm_protection_required);

gap_security_level_t gap_security_level_for_link_key_type(link_key_type_t link_key_type);

/**
 * @brief map link keys to secure connection yes/no
 */
bool gap_secure_connection_for_link_key_type(link_key_type_t link_key_type);

/**
 * @brief map link keys to authenticated
 */
bool gap_authenticated_for_link_key_type(link_key_type_t link_key_type);

gap_security_level_t gap_security_level(hci_con_handle_t con_handle);

void gap_request_security_level(hci_con_handle_t con_handle, gap_security_level_t level);

bool gap_mitm_protection_required_for_security_level(gap_security_level_t level);

/**
 * @brief Set Page Scan Type
 * @param page_scan_interval * 0.625 ms, range: 0x0012..0x1000, default: 0x0800
 * @param page_scan_windows  * 0.625 ms, range: 0x0011..page_scan_interval, default: 0x0012
 */
void gap_set_page_scan_activity(uint16_t page_scan_interval, uint16_t page_scan_window);

/**
 * @brief Set Page Scan Type
 * @param page_scan_mode
 */
void gap_set_page_scan_type(page_scan_type_t page_scan_type);

/**
 * @brief Set Page Timeout
 * @param page_timeout * 0.625 ms, range: 0x0001..0xffff, default: 0x6000 (ca 15 seconds)
 */
void gap_set_page_timeout(uint16_t page_timeout);

// LE

/**
 * @brief Set parameters for LE Scan
 * @param scan_type 0 = passive, 1 = active
 * @param scan_interval range 0x0004..0x4000, unit 0.625 ms
 * @param scan_window range 0x0004..0x4000, unit 0.625 ms
 * @param scanning_filter_policy 0 = all devices, 1 = all from whitelist
 */
void gap_set_scan_params(uint8_t scan_type, uint16_t scan_interval, uint16_t scan_window, uint8_t scanning_filter_policy);

/**
 * @brief Set parameters for LE Scan
 * @deprecated Use gap_set_scan_params instead
 */
void gap_set_scan_parameters(uint8_t scan_type, uint16_t scan_interval, uint16_t scan_window);

/**
 * @brief Start LE Scan
 */
void gap_start_scan(void);

/**
 * @brief Stop LE Scan
 */
void gap_stop_scan(void);

/**
 * @brief Enable privacy by using random addresses
 * @param random_address_type to use (incl. OFF)
 */
void gap_random_address_set_mode(gap_random_address_type_t random_address_type);

/**
 * @brief Get privacy mode
 */
gap_random_address_type_t gap_random_address_get_mode(void);

/**
 * @brief Sets update period for random address
 * @param period_ms in ms
 */
 void gap_random_address_set_update_period(int period_ms);

/**
 * @brief Sets a fixed random address for advertising
 * @param addr
 * @note Sets random address mode to type off
 */
void gap_random_address_set(const bd_addr_t addr);

/**
 * @brief Set Advertisement Data
 * @param advertising_data_length
 * @param advertising_data (max 31 octets)
 * @note data is not copied, pointer has to stay valid
 * @note '00:00:00:00:00:00' in advertising_data will be replaced with actual bd addr
 */
void gap_advertisements_set_data(uint8_t advertising_data_length, uint8_t * advertising_data);

/**
 * @brief Set Advertisement Parameters
 * @param adv_int_min
 * @param adv_int_max
 * @param adv_type
 * @param direct_address_type
 * @param direct_address
 * @param channel_map
 * @param filter_policy
 * @note own_address_type is used from gap_random_address_set_mode
 */
void gap_advertisements_set_params(uint16_t adv_int_min, uint16_t adv_int_max, uint8_t adv_type,
	uint8_t direct_address_typ, bd_addr_t direct_address, uint8_t channel_map, uint8_t filter_policy);

/**
 * @brief Enable/Disable Advertisements. OFF by default.
 * @param enabled
 */
void gap_advertisements_enable(int enabled);

/**
 * @brief Set Scan Response Data
 *
 * @note For scan response data, scannable undirected advertising (ADV_SCAN_IND) need to be used
 *
 * @param advertising_data_length
 * @param advertising_data (max 31 octets)
 * @note data is not copied, pointer has to stay valid
 * @note '00:00:00:00:00:00' in scan_response_data will be replaced with actual bd addr
 */
void gap_scan_response_set_data(uint8_t scan_response_data_length, uint8_t * scan_response_data);

/**
 * @brief Provide storage for new advertising set and setup on Controller
 * @param storage to use by stack, needs to stay valid until adv set is removed with gap_extended_advertising_remove
 * @param advertising_parameters
 * @param out_advertising_handle to use with other adv config commands
 * @return status
 * @events: GAP_SUBEVENT_ADVERTISING_SET_INSTALLED
 */
uint8_t gap_extended_advertising_setup(le_advertising_set_t * storage, const le_extended_advertising_parameters_t * advertising_parameters, uint8_t * out_advertising_handle);

/**
 * @param Set advertising params for advertising set
 * @param advertising_handle
 * @param advertising_parameters
 * @return status
 */
uint8_t gap_extended_advertising_set_params(uint8_t advertising_handle, const le_extended_advertising_parameters_t * advertising_parameters);

/**
 * @param Get advertising params for advertising set, e.g. to update params
 * @param advertising_handle
 * @param advertising_parameters
 * @return status
 */
uint8_t gap_extended_advertising_get_params(uint8_t advertising_handle, le_extended_advertising_parameters_t * advertising_parameters);

/**
 * @param Set periodic advertising params for advertising set
 * @param advertising_handle
 * @param advertising_parameters
 * @return status
 */
uint8_t gap_periodic_advertising_set_params(uint8_t advertising_handle, const le_periodic_advertising_parameters_t * advertising_parameters);

/**
 * @param Get params for periodic advertising set, e.g. to update params
 * @param advertising_handle
 * @param advertising_parameters
 * @return status
 */
uint8_t gap_periodic_advertising_get_params(uint8_t advertising_handle, le_periodic_advertising_parameters_t * advertising_parameters);

/**
 * @param Set random addrress for advertising set
 * @param advertising_handle
 * @param random_address
 * @return status
 */
uint8_t gap_extended_advertising_set_random_address(uint8_t advertising_handle, bd_addr_t random_address);

/**
 * @brief Set Advertising Data for a advertisement set
 * @param advertising_handle
 * @param advertising_data_length
 * @param advertising_data
 * @return status
 */
uint8_t gap_extended_advertising_set_adv_data(uint8_t advertising_handle, uint16_t advertising_data_length, const uint8_t * advertising_data);

/**
 * @brief Set Scan Response Data for a advertisement set
 * @param advertising_handle
 * @param scan_response_data_length
 * @param scan_response_data
 * @return status
 */
uint8_t gap_extended_advertising_set_scan_response_data(uint8_t advertising_handle, uint16_t scan_response_data_length, const uint8_t * scan_response_data);

/**
 * @brief Set data for periodic advertisement set
 * @param advertising_handle
 * @param periodic_data_length
 * @param periodic_data
 * @return status
 */
uint8_t gap_periodic_advertising_set_data(uint8_t advertising_handle, uint16_t periodic_data_length, const uint8_t * periodic_data);

/**
 * @brief Start advertising advertising set
 * @param advertising_handle
 * @param timeout in 10ms, or 0 == no timeout
 * @param num_extended_advertising_events Controller shall send, or 0 == no max number
 * @return status
 */
uint8_t gap_extended_advertising_start(uint8_t advertising_handle, uint16_t timeout, uint8_t num_extended_advertising_events);

/**
 * @brief Stop advertising
 * @param advertising_handle
 * @return status
 */
uint8_t gap_extended_advertising_stop(uint8_t advertising_handle);

/**
 * @brief Start periodic advertising for given advertising set
 * @param advertising_handle
 * @param include_adi
 * @return status
 */
uint8_t gap_periodic_advertising_start(uint8_t advertising_handle, bool include_adi);

/**
 * @brief Stop periodic advertising for given advertising set
 * @param advertising_handle
 * @return status
 */
uint8_t gap_periodic_advertising_stop(uint8_t advertising_handle);

/**
 * @brief Remove advertising set from Controller
 * @param advertising_handle
 * @return status
 * @events GAP_SUBEVENT_ADVERTISING_SET_REMOVED
 */
uint8_t gap_extended_advertising_remove(uint8_t advertising_handle);

/**
 * @brief Create Broadcast Isochronous Group (BIG)
 * @param storage to use by stack, needs to stay valid until adv set is removed with gap_big_terminate
 * @param big_params
 * @return status
 * @events GAP_SUBEVENT_BIG_CREATED unless interrupted by call to gap_big_terminate
 */
uint8_t gap_big_create(le_audio_big_t * storage, le_audio_big_params_t * big_params);

/**
 * @brief Terminate Broadcast Isochronous Group (BIG)
 * @param big_handle
 * @return status
 * @events: GAP_SUBEVENT_BIG_TERMINATED
 */
uint8_t gap_big_terminate(uint8_t big_handle);

/**
 * @brief Synchronize to Broadcast Isochronous Group (BIG)
 * @param storage to use by stack, needs to stay valid until adv set is removed with gap_big_terminate
 * @param big_sync_params
 * @return status
 * @events GAP_SUBEVENT_BIG_SYNC_CREATED unless interrupted by call to gap_big_sync_terminate
 */
uint8_t gap_big_sync_create(le_audio_big_sync_t * storage, le_audio_big_sync_params_t * big_sync_params);

/**
 * @brief Stop synchronizing to Broadcast Isochronous Group (BIG). Triggers GAP_SUBEVENT_BIG_SYNC_STOPPED
 * @note Also used to stop synchronizing before BIG Sync was established
 * @param big_handle
 * @return status
 * @events GAP_SUBEVENT_BIG_SYNC_STOPPED
 */
uint8_t gap_big_sync_terminate(uint8_t big_handle);

/**
 * @brief Set connection parameters for outgoing connections
 * @param conn_scan_interval (unit: 0.625 msec), default: 60 ms
 * @param conn_scan_window (unit: 0.625 msec), default: 30 ms
 * @param conn_interval_min (unit: 1.25ms), default: 10 ms
 * @param conn_interval_max (unit: 1.25ms), default: 30 ms
 * @param conn_latency, default: 4
 * @param supervision_timeout (unit: 10ms), default: 720 ms
 * @param min_ce_length (unit: 0.625ms), default: 10 ms
 * @param max_ce_length (unit: 0.625ms), default: 30 ms
 */
void gap_set_connection_parameters(uint16_t conn_scan_interval, uint16_t conn_scan_window,
    uint16_t conn_interval_min, uint16_t conn_interval_max, uint16_t conn_latency,
    uint16_t supervision_timeout, uint16_t min_ce_length, uint16_t max_ce_length);

/**
 * @brief Request an update of the connection parameter for a given LE connection
 * @param handle
 * @param conn_interval_min (unit: 1.25ms)
 * @param conn_interval_max (unit: 1.25ms)
 * @param conn_latency
 * @param supervision_timeout (unit: 10ms)
 * @return 0 if ok
 */
int gap_request_connection_parameter_update(hci_con_handle_t con_handle, uint16_t conn_interval_min,
	uint16_t conn_interval_max, uint16_t conn_latency, uint16_t supervision_timeout);

/**
 * @brief Updates the connection parameters for a given LE connection
 * @param handle
 * @param conn_interval_min (unit: 1.25ms)
 * @param conn_interval_max (unit: 1.25ms)
 * @param conn_latency
 * @param supervision_timeout (unit: 10ms)
 * @return 0 if ok
 */
int gap_update_connection_parameters(hci_con_handle_t con_handle, uint16_t conn_interval_min,
	uint16_t conn_interval_max, uint16_t conn_latency, uint16_t supervision_timeout);

/**
 * @brief Set accepted connection parameter range
 * @param range
 */
void gap_get_connection_parameter_range(le_connection_parameter_range_t * range);

/**
 * @brief Get accepted connection parameter range
 * @param range
 */
void gap_set_connection_parameter_range(le_connection_parameter_range_t * range);

/**
 * @brief Test if connection parameters are inside in existing rage
 * @param conn_interval_min (unit: 1.25ms)
 * @param conn_interval_max (unit: 1.25ms)
 * @param conn_latency
 * @param supervision_timeout (unit: 10ms)
 * @return 1 if included
 */
int gap_connection_parameter_range_included(le_connection_parameter_range_t * existing_range, uint16_t le_conn_interval_min, uint16_t le_conn_interval_max, uint16_t le_conn_latency, uint16_t le_supervision_timeout);

/**
 * @brief Set max number of connections in LE Peripheral role (if Bluetooth Controller supports it)
 * @note: default: 1
 * @param max_peripheral_connections
 */
void gap_set_max_number_peripheral_connections(int max_peripheral_connections);

/**
 * @brief Add Device to Whitelist
 * @param address_typ
 * @param address
 * @return 0 if ok
 */
uint8_t gap_whitelist_add(bd_addr_type_t address_type, const bd_addr_t address);

/**
 * @brief Remove Device from Whitelist
 * @param address_typ
 * @param address
 * @return 0 if ok
 */
uint8_t gap_whitelist_remove(bd_addr_type_t address_type, const bd_addr_t address);

/**
 * @brief Clear Whitelist
 * @return 0 if ok
 */
uint8_t gap_whitelist_clear(void);

/**
 * @brief Connect to remote LE device
 */
uint8_t gap_connect(const bd_addr_t addr, bd_addr_type_t addr_type);

/**
 *  @brief Connect with Whitelist
 *  @note Explicit whitelist management and this connect with whitelist replace deprecated gap_auto_connection_* functions
 *  @return - if ok
 */
uint8_t gap_connect_with_whitelist(void);

/**
 * @brief Cancel connection process initiated by gap_connect
 */
uint8_t gap_connect_cancel(void);

/**
 * @brief Auto Connection Establishment - Start Connecting to device
 * @deprecated Please setup Whitelist with gap_whitelist_* and start connecting with gap_connect_with_whitelist
 * @param address_type
 * @param address
 * @return 0 if ok
 */
uint8_t gap_auto_connection_start(bd_addr_type_t address_type, const bd_addr_t address);

/**
 * @brief Auto Connection Establishment - Stop Connecting to device
 * @deprecated Please setup Whitelist with gap_whitelist_* and start connecting with gap_connect_with_whitelist
 * @param address_type
 * @param address
 * @return 0 if ok
 */
uint8_t gap_auto_connection_stop(bd_addr_type_t address_type, const bd_addr_t address);

/**
 * @brief Auto Connection Establishment - Stop everything
 * @deprecated Please setup Whitelist with gap_whitelist_* and start connecting with gap_connect_with_whitelist
 * @note  Convenience function to stop all active auto connection attempts
 */
uint8_t gap_auto_connection_stop_all(void);

/**
 * @brief Set LE PHY
 * @param con_handle
 * @param all_phys 0 = set rx/tx, 1 = set only rx, 2 = set only tx
 * @param tx_phys 1 = 1M, 2 = 2M, 4 = Coded
 * @param rx_phys 1 = 1M, 2 = 2M, 4 = Coded
 * @param phy_options 0 = no preferred coding for Coded, 1 = S=2 coding (500 kbit), 2 = S=8 coding (125 kbit)
 * @return 0 if ok
 */
uint8_t gap_le_set_phy(hci_con_handle_t con_handle, uint8_t all_phys, uint8_t tx_phys, uint8_t rx_phys, uint8_t phy_options);

/**
 * @brief Get connection interval
 * @param con_handle
 * @return connection interval, otherwise 0 if error
 */
uint16_t gap_le_connection_interval(hci_con_handle_t con_handle);

/**
 *
 * @brief Get encryption key size.
 * @param con_handle
 * @return 0 if not encrypted, 7-16 otherwise
 */
uint8_t gap_encryption_key_size(hci_con_handle_t con_handle);

/**
 * @brief Get authentication property.
 * @param con_handle
 * @return 1 if bonded with OOB/Passkey (AND MITM protection)
 */
bool gap_authenticated(hci_con_handle_t con_handle);

/**
 * @brief Get secure connection property
 * @param con_handle
 * @return 1 if bonded usiung LE Secure Connections
 */
bool gap_secure_connection(hci_con_handle_t con_handle);

/**
 * @brief Queries authorization state.
 * @param con_handle
 * @return authorization_state for the current session
 */
authorization_state_t gap_authorization_state(hci_con_handle_t con_handle);

/**
 * @brief Get bonded property (BR/EDR/LE)
 * @note LE: has to be called after identity resolving is complete
 * @param con_handle
 * @return true if bonded
 */
bool gap_bonded(hci_con_handle_t con_handle);

// Classic
#ifdef ENABLE_CLASSIC

/**
 * @brief Override page scan mode. Page scan mode enabled by l2cap when services are registered
 * @note Might be used to reduce power consumption while Bluetooth module stays powered but no (new)
 *       connections are expected
 */
void gap_connectable_control(uint8_t enable);

/**
 * @brief Allows to control if device is discoverable. OFF by default.
 */
void gap_discoverable_control(uint8_t enable);

/**
 * @brief Deletes link key for remote device with baseband address.
 * @param addr
 * @note On most desktop ports, the Link Key DB uses a TLV and there is one TLV storage per
 *       Controller resp. its Bluetooth Address. As the Bluetooth Address is retrieved during
 *       power up, this function only works, when the stack is in working state for these ports.
 */
void gap_drop_link_key_for_bd_addr(bd_addr_t addr);

/**
 * @brief Delete all stored link keys
 * @note On most desktop ports, the Link Key DB uses a TLV and there is one TLV storage per
 *       Controller resp. its Bluetooth Address. As the Bluetooth Address is retrieved during
 *       power up, this function only works, when the stack is in working state for these ports.
 */
void gap_delete_all_link_keys(void);

/**
 * @brief Store link key for remote device with baseband address
 * @param addr
 * @param link_key
 * @param link_key_type
 * @note On most desktop ports, the Link Key DB uses a TLV and there is one TLV storage per
 *       Controller resp. its Bluetooth Address. As the Bluetooth Address is retrieved during
 *       power up, this function only works, when the stack is in working state for these ports.
 */
void gap_store_link_key_for_bd_addr(bd_addr_t addr, link_key_t link_key, link_key_type_t type);

/**
 * @brief Get link for remote device with basband address
 * @param addr
 * @param link_key (out) is stored here
 * @param link_key_type (out) is stored here
 * @note On most desktop ports, the Link Key DB uses a TLV and there is one TLV storage per
 *       Controller resp. its Bluetooth Address. As the Bluetooth Address is retrieved during
 *       power up, this function only works, when the stack is in working state for these ports.
 */
bool gap_get_link_key_for_bd_addr(bd_addr_t addr, link_key_t link_key, link_key_type_t * type);

/**
 * @brief Setup Link Key iterator
 * @param it
 * @return 1 on success
 * @note On most desktop ports, the Link Key DB uses a TLV and there is one TLV storage per
 *       Controller resp. its Bluetooth Address. As the Bluetooth Address is retrieved during
 *       power up, this function only works, when the stack is in working state for these ports.
 */
int gap_link_key_iterator_init(btstack_link_key_iterator_t * it);

/**
 * @brief Get next Link Key
 * @param it
 * @brief addr
 * @brief link_key
 * @brief type of link key
 * @return 1, if valid link key found
 * @see note on gap_link_key_iterator_init
 */
int gap_link_key_iterator_get_next(btstack_link_key_iterator_t * it, bd_addr_t bd_addr, link_key_t link_key, link_key_type_t * type);

/**
 * @brief Frees resources allocated by iterator_init
 * @note Must be called after iteration to free resources
 * @param it
 * @see note on gap_link_key_iterator_init
 */
void gap_link_key_iterator_done(btstack_link_key_iterator_t * it);

/**
 * @brief Start GAP Classic Inquiry
 * @param duration in 1.28s units
 * @return 0 if ok
 * @events: GAP_EVENT_INQUIRY_RESULT, GAP_EVENT_INQUIRY_COMPLETE
 */
int gap_inquiry_start(uint8_t duration_in_1280ms_units);

/**
 * @brief Start GAP Classic Periodic Inquiry
 * @param duration in 1.28s units
 * @param max_period_length between consecutive inquiries in 1.28s units
 * @param min_period_length between consecutive inquiries in 1.28s units
 * @return 0 if ok
 * @events: GAP_EVENT_INQUIRY_RESULT, GAP_EVENT_INQUIRY_COMPLETE
 */
uint8_t gap_inquiry_periodic_start(uint8_t duration, uint16_t max_period_length, uint16_t min_period_length);

/**
 * @brief Stop GAP Classic Inquiry (regular or periodic)
 * @return 0 if ok
 * @events: GAP_EVENT_INQUIRY_COMPLETE
 */
int gap_inquiry_stop(void);

/**
 * @brief Set LAP for GAP Classic Inquiry
 * @param lap GAP_IAC_GENERAL_INQUIRY (default), GAP_IAC_LIMITED_INQUIRY
 */
void gap_inquiry_set_lap(uint32_t lap);

/**
 * @brief Set Inquiry Scan Activity
 * @param inquiry_scan_interval range: 0x0012 to 0x1000; only even values are valid, Time = N * 0.625 ms
 * @param inquiry_scan_window range: 0x0011 to 0x1000; Time = N * 0.625 ms
 */
void gap_inquiry_set_scan_activity(uint16_t inquiry_scan_interval, uint16_t inquiry_scan_window);

/**
 * @brief Remote Name Request
 * @param addr
 * @param page_scan_repetition_mode
 * @param clock_offset only used when bit 15 is set - pass 0 if not known
 * @events: HCI_EVENT_REMOTE_NAME_REQUEST_COMPLETE
 */
int gap_remote_name_request(const bd_addr_t addr, uint8_t page_scan_repetition_mode, uint16_t clock_offset);

/**
 * @brief Legacy Pairing Pin Code Response
 * @note data is not copied, pointer has to stay valid
 * @param addr
 * @param pin
 * @return 0 if ok
 */
int gap_pin_code_response(const bd_addr_t addr, const char * pin);

/**
 * @brief Legacy Pairing Pin Code Response for binary data / non-strings
 * @note data is not copied, pointer has to stay valid
 * @param addr
 * @param pin_data
 * @param pin_len
 * @return 0 if ok
 */
int gap_pin_code_response_binary(const bd_addr_t addr, const uint8_t * pin_data, uint8_t pin_len);

/**
 * @brief Abort Legacy Pairing
 * @param addr
 * @param pin
 * @return 0 if ok
 */
int gap_pin_code_negative(bd_addr_t addr);

/**
 * @brief SSP Passkey Response
 * @param addr
 * @param passkey [0..999999]
 * @return 0 if ok
 */
int gap_ssp_passkey_response(const bd_addr_t addr, uint32_t passkey);

/**
 * @brief Abort SSP Passkey Entry/Pairing
 * @param addr
 * @param pin
 * @return 0 if ok
 */
int gap_ssp_passkey_negative(const bd_addr_t addr);

/**
 * @brief Accept SSP Numeric Comparison
 * @param addr
 * @param passkey
 * @return 0 if ok
 */
int gap_ssp_confirmation_response(const bd_addr_t addr);

/**
 * @brief Abort SSP Numeric Comparison/Pairing
 * @param addr
 * @param pin
 * @return 0 if ok
 */
int gap_ssp_confirmation_negative(const bd_addr_t addr);

/**
 * @brief Generate new OOB data
 * @note OOB data will be provided in GAP_EVENT_LOCAL_OOB_DATA and be used in future pairing procedures
 */
void gap_ssp_generate_oob_data(void);

/**
 * @brief Report Remote OOB Data
 * @note Pairing Hash and Randomizer are expected in big-endian byte format
 * @param bd_addr
 * @param c_192 Simple Pairing Hash C derived from P-192 public key
 * @param r_192 Simple Pairing Randomizer derived from P-192 public key
 * @param c_256 Simple Pairing Hash C derived from P-256 public key
 * @param r_256 Simple Pairing Randomizer derived from P-256 public key
 */
uint8_t gap_ssp_remote_oob_data(const bd_addr_t addr, const uint8_t * c_192, const uint8_t * r_192, const uint8_t * c_256, const uint8_t * r_256);

/**
 * Send SSP IO Capabilities Reply
 * @note IO Capabilities (Negative) Reply is sent automatically unless ENABLE_EXPLICIT_IO_CAPABILITIES_REPLY
 * @param addr
 * @return 0 if ok
 */
uint8_t gap_ssp_io_capabilities_response(const bd_addr_t addr);

/**
 * Send SSP IO Capabilities Negative Reply
 * @note IO Capabilities (Negative) Reply is sent automatically unless ENABLE_EXPLICIT_IO_CAPABILITIES_REPLY
 * @param addr
 * @return 0 if ok
 */
uint8_t gap_ssp_io_capabilities_negative(const bd_addr_t addr);

/**
 * Send Link Key Reponse
 * @note Link Key (Negative) Reply is sent automatically unless ENABLE_EXPLICIT_LINK_KEY_RESPONSE
 * @param addr
 * @param link_key
 * @param type or INVALID_LINK_KEY if link key not available
 * @return 0 if ok
 */
 uint8_t gap_send_link_key_response(const bd_addr_t addr, link_key_t link_key, link_key_type_t type);

/**
 * @brief Enter Sniff mode
 * @param con_handle
 * @param sniff_min_interval range: 0x0002 to 0xFFFE; only even values are valid, Time = N * 0.625 ms
 * @param sniff_max_interval range: 0x0002 to 0xFFFE; only even values are valid, Time = N * 0.625 ms
 * @param sniff_attempt Number of Baseband receive slots for sniff attempt.
 * @param sniff_timeout Number of Baseband receive slots for sniff timeout.
 @ @return 0 if ok
 */
uint8_t gap_sniff_mode_enter(hci_con_handle_t con_handle, uint16_t sniff_min_interval, uint16_t sniff_max_interval, uint16_t sniff_attempt, uint16_t sniff_timeout);

/**
 * @brief Exit Sniff mode
 * @param con_handle
 @ @return 0 if ok
 */
uint8_t gap_sniff_mode_exit(hci_con_handle_t con_handle);

/**
 * @brief Configure Sniff Subrating
 * @param con_handle
 * @param max_latency range: 0x0002 to 0xFFFE; Time = N * 0.625 ms
 * @param min_remote_timeout range:  0x0002 to 0xFFFE; Time = N * 0.625 ms
 * @param min_local_timeout range:  0x0002 to 0xFFFE; Time = N * 0.625 ms
 @ @return 0 if ok
 */
uint8_t gap_sniff_subrating_configure(hci_con_handle_t con_handle, uint16_t max_latency, uint16_t min_remote_timeout, uint16_t min_local_timeout);

/**
 * @Brief Set QoS
 * @param con_handle
 * @param service_type
 * @param token_rate
 * @param peak_bandwidth
 * @param latency
 * @param delay_variation
 @ @return 0 if ok
 */
uint8_t gap_qos_set(hci_con_handle_t con_handle, hci_service_type_t service_type, uint32_t token_rate, uint32_t peak_bandwidth, uint32_t latency, uint32_t delay_variation);

#endif

// LE

/**
 * @brief Get own addr type and address used for LE for next scan/advertisement/connect operation
 */
void gap_le_get_own_address(uint8_t * addr_type, bd_addr_t addr);

/**
 * @brief Get own addr type and address used for LE advertisements (Peripheral)
 */
void gap_le_get_own_advertisements_address(uint8_t * addr_type, bd_addr_t addr);

/**
 * @brief Get own addr type and address used for LE connections (Central)
 */
void gap_le_get_own_connection_address(uint8_t * addr_type, bd_addr_t addr);

/**
 * @brief Get state of connection re-encryption for bonded devices when in central role
 * @note used by gatt_client and att_server to wait for re-encryption
 * @param con_handle
 * @return 1 if security setup is active
 */
int gap_reconnect_security_setup_active(hci_con_handle_t con_handle);

/**
 * @brief Delete bonding information for remote device
 * @note On most desktop ports, the LE Device DB uses a TLV and there is one TLV storage per
 *       Controller resp. its Bluetooth Address. As the Bluetooth Address is retrieved during
 *       power up, this function only works, when the stack is in working state for these ports.
 * @param address_type
 * @param address
 */
void gap_delete_bonding(bd_addr_type_t address_type, bd_addr_t address);

/**
 * LE Privacy 1.2 - requires support by Controller and ENABLE_LE_RESOLVING_LIST to be defined
 */

/**
 * @brief Load LE Device DB entries into Controller Resolving List to allow filtering on
 *        bonded devies with resolvable private addresses
 * @return EROOR_CODE_SUCCESS if supported by Controller
 */
uint8_t gap_load_resolving_list_from_le_device_db(void);

/**
 * @brief Get local persistent IRK
 */
const uint8_t * gap_get_persistent_irk(void);

/* API_END*/

#if defined __cplusplus
}
#endif

#endif // GAP_H