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mbed-os/features/FEATURE_BLE/ble/pal/PalGap.h

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/* mbed Microcontroller Library
* Copyright (c) 2017-2017 ARM Limited
*
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
* You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*/
#ifndef BLE_PAL_GAP_H_
#define BLE_PAL_GAP_H_
#include "platform/Callback.h"
#include "GapTypes.h"
#include "GapEvents.h"
namespace ble {
namespace pal {
/**
* Adaptation interface for the GAP layer.
*
* Define the primitive necessary to realize GAP operations. the API and event
* follow closely the definition of the HCI commands and events used
* by that layer.
*/
struct Gap {
/**
* Initialisation of the instance. An implementation can use this function
* to initialise the subsystems needed to realize the operations of this
* interface.
*
* This function has to be called before any other operations.
*
* @return BLE_ERROR_NONE if the request has been successfully sent or the
* appropriate error otherwise.
*/
virtual ble_error_t initialize() = 0;
/**
* Termination of the instance. An implementation can use this function
* to release the subsystems initialised to realise the operations of
* this interface.
*
* After a call to this function, initialise should be called again to
* allow use of the interface.
*
* @return BLE_ERROR_NONE if the request has been successfully sent or the
* appropriate error otherwise.
*/
virtual ble_error_t terminate() = 0;
/**
* Return the public device address.
*
* @note The public device address is usually acquired at initialization and
* stored in the instance.
*
* @return the public device address.
*/
virtual address_t get_device_address() = 0;
/**
* Return the current random address.
*
* @note The random address is usually acquired at initialization and stored
* in the instance.
*
* @return the random device address.
*/
virtual address_t get_random_address() = 0;
/**
* Set the random address which will used be during scan, connection or
* advertising process if the own address type selected is random.
*
* Changing the address during scan, connection or advertising process is
* forbiden.
*
* @note: See Bluetooth 5 Vol 2 PartE: 7.8.4 LE set random address command.
*
* @return BLE_ERROR_NONE if the request has been successfully sent or the
* appropriate error otherwise.
*/
virtual ble_error_t set_random_address(const address_t& address) = 0;
/**
* Set the advertising parameters which will be used during the advertising
* process.
*
* @param advertising_interval_min: Minimum advertising interval which can
* be used during undirected and low duty cycle directed advertising. This
* parameter shall be less than or equal to advertising_interval_max. This
* parameter shall be in the range [0x20 : 0x4000] where each unit is equal
* to 0.625ms.
* This parameter is not used by directed high duty cycle advertising.
*
* @param advertising_interval_max: Maximum advertising interval which can
* be used during undirected and low duty cycle directed advertising. This
* parameter shall be more than or equal to advertising_interval_min. This
* parameter shall be in the range [0x20 : 0x4000] where each unit is equal
* to 0.625ms.
* This parameter is not used by directed high duty cycle advertising.
*
* @param advertising_type Packet type that is used during the
* advertising process. Direct advertising require valid peer addresses
* parameters and ignore the filter policy set.
* If the High duty cycle advertising is used then the advertising parameter
* intervals are ignored.
*
* @param own_address_type Own address type used during advertising.
* If own address type is equal to RESOLVABLE_PRIVATE_ADDRESS_PUBLIC_FALLBACK
* or RESOLVABLE_PRIVATE_ADDRESS_RANDOM_FALLBACK then the peer address
* parameters (type and address) will be used to find the local IRK.
*
* @param peer_address_type Address type of the peer.
* This parameter shall be valid if directed advertising is used (
* ADV_DIRECT_IND or ADV_DIRECT_IND_LOW_DUTY_CYCLE). This parameter should
* be valid if the own address type is equal to 0x02 or 0x03.
* In other cases, this parameter is ignored.
*
* @param peer_address Public device address, Random device addres, Public
* identity address or Random static identity address of the device targeted
* by the advertising.
* This parameter shall be valid if directed advertising is used (
* ADV_DIRECT_IND or ADV_DIRECT_IND_LOW_DUTY_CYCLE). This parameter should
* be valid if the own address type is equal to 0x02 or 0x03.
* In other cases, this parameter is ignored.
*
* @param advertising_channel_map Map of the channel used to send
* advertising data.
*
* @param advertising_filter_policy Filter policy applied during the
* advertising process. The subsystem should use the whitelist to apply the
* policy. This parameter is ignored if the advertising type is directed (
* ADV_DIRECT_IND or ADV_DIRECT_IND_LOW_DUTY_CYCLE).
*
* @return BLE_ERROR_NONE if the request has been successfully sent or the
* appropriate error otherwise.
*
* @note: See Bluetooth 5 Vol 2 PartE: 7.8.5 LE set advertising parameters
* command.
*/
virtual ble_error_t set_advertising_parameters(
uint16_t advertising_interval_min,
uint16_t advertising_interval_max,
advertising_type_t advertising_type,
own_address_type_t own_address_type,
advertising_peer_address_type_t peer_address_type,
const address_t& peer_address,
advertising_channel_map_t advertising_channel_map,
advertising_filter_policy_t advertising_filter_policy
) = 0;
/**
* Set the data sends in advertising packet. If the advertising is
* currently enabled, the data shall be used when a new advertising packet
* is issued.
*
* @param advertising_data_length Number of significant bytes in the
* advertising data.
*
* @param advertising_data The data sends in advertising packets. Non
* significant bytes shall be equal to 0.
*
* @return BLE_ERROR_NONE if the request has been successfully sent or the
* appropriate error otherwise.
*
* @note: See Bluetooth 5 Vol 2 PartE: 7.8.5 LE set advertising data
* command.
*/
virtual ble_error_t set_advertising_data(
uint8_t advertising_data_length,
const advertising_data_t& advertising_data
) = 0;
/**
* Set the data sends in scan response packets. If the advertising is
* currently enabled, the data shall be used when a new scan response is
* issued.
*
* @param scan_response_data_length Number of significant bytes in the
* scan response data.
*
* @param scan_response_data The data sends in scan response packets. Non
* significant bytes shall be equal to 0.
*
* @return BLE_ERROR_NONE if the request has been successfully sent or the
* appropriate error otherwise.
*
* @note: See Bluetooth 5 Vol 2 PartE: 7.8.8 LE set scan response data
* command.
*/
virtual ble_error_t set_scan_response_data(
uint8_t scan_response_data_length,
const advertising_data_t& scan_response_data
) = 0;
/**
* Start or stop advertising.
*
* The process use advertising and scan response data set with
* set_advertising_data and set_scan_response_data while the parameters used
* are the one set by set_advertising_parameters.
*
* The advertising shall continue until:
* - The advertising is manually disabled (advertising_enable(false)).
* - A connection is created.
* - Time out in case of high duty cycle directed advertising.
*
* If the random address has not been set and the advertising parameter
* own_address_type is set to 0x01 then the procedure shall fail.
*
* If the random address has not been set and the advertising parameter
* own_address_type is set to RESOLVABLE_PRIVATE_ADDRESS_RANDOM_FALLBACK and
* the peer address is not in the resolving list then the procedure shall
* fail.
*
* @param enable If true start the advertising process, if the process was
* already runing and own_address_type is equal to 0x02 or 0x03, the
* subsystem can change the random address.
* If false and the advertising is running then the process should be
* stoped.
*
* @return BLE_ERROR_NONE if the request has been successfully sent or the
* appropriate error otherwise.
*
* @note: See Bluetooth 5 Vol 2 PartE: 7.8.9 LE set advertising enable
* command.
*
* @note If the advertising type is ADV_DIRECT_IND and the connection is not
* created during the time allowed to the procedure then a
* ConnectionComplete event shall be emmited with its error code set to
* ADVERTISING_TIMEOUT.
*
* @note Successfull connection shall emit a ConnectionComplete event. It
* also means advertising is disabled.
*/
virtual ble_error_t advertising_enable(bool enable) = 0;
/**
* Set the parameter of the scan process.
*
* This command shall not be effective when the scanning process is running.
*
* @param active_scanning If true the subsystem does active scanning and
* the bluetooth subsystem shall send scanning PDUs. It shall also listen
* to scan responses. If false no scanning PDUs are sent during the scan
* process.
*
* @param scan_interval The time interval between two subsequent LE scans in
* unit of 0.625ms. This parameter shall be in the range [0x0004 : 0x4000].
*
* @param scan_window Duration of the LE scan. It shall be less than or
* equal to scan_interval value. This parameter shall be in the range
* [0x0004 : 0x4000] and is in unit of 0.625ms.
*
* @param own_address_type Own address type used in scan request packets.
*
* @param filter_policy Filter policy applied when scanning.
*
* @return BLE_ERROR_NONE if the request has been successfully sent or the
* appropriate error otherwise.
*
* @note: See Bluetooth 5 Vol 2 PartE: 7.8.10 LE set scan parameters
* command.
*/
virtual ble_error_t set_scan_parameters(
bool active_scanning,
uint16_t scan_interval,
uint16_t scan_window,
own_address_type_t own_address_type,
scanning_filter_policy_t filter_policy
) = 0;
/**
* Start/stop scanning process.
*
* Parameters of the scanning process shall be set before the scan launch
* by using the function set_scan_parameters.
*
* @parameter enable Start the scanning process if true and stop it if
* false. If the scan process is already started, enabling it again will
* only update the duplicate filtering; based on the new parameter.
*
* @parameter filter_duplicates Enable duplicate filtering if true,
* otherwise disable it.
*
* @attention advertising data or scan response data is not considered
* significant when determining duplicate advertising reports.
*
* @return BLE_ERROR_NONE if the request has been successfully sent or the
* appropriate error otherwise.
*
* @note: See Bluetooth 5 Vol 2 PartE: 7.8.11 LE set scan enable command.
*/
virtual ble_error_t scan_enable(
bool enable,
bool filter_duplicates
) = 0;
/**
* Create a new le connection to a connectable advertiser.
*
* @param scan_interval Hint to the le subsystem indicating how
* frequently it should scan for the peer address. It represent the time
* interval between two subsequent scan for the peer. It shall be in the
* range [0x0004 : 0x4000] and the time is in unit of 0.625ms.
*
* @param scan_window Hint to the le subsystem indicating for how long it
* should scan during a scan interval. The value shall be smaller or equal
* to scan_interval. If it is equal to scan_interval then scanning should
* run continuously. It shall be in the range [0x0004 : 0x4000] and the time
* is in unit of 0.625ms.
*
* @param initiator_policy Used to determine if the whitelist is used to
* determine the address to connect to. If the whitelist is not used, the
* connection shall be made against an advertiser matching the peer_address
* and the peer_address_type parameters. Otherwise those parameters are
* ignored.
*
* @param peer_address_type Type of address used by the advertiser. Not used
* if initiator_policy use the whitelist.
*
* @param Address used by the advertiser in its advertising packets. Not
* used if initiator_policy use the whitelist.
*
* @param own_address_type Type of address used in the connection request
* packet.
*
* @param connection_interval_min Minimum interval between two connection
* events allowed for the connection. It shall be less than or equal to
* connection_interval_max. This value shall be in range [0x0006 : 0x0C80]
* and is in unit of 1.25ms.
*
* @param connection_interval_max Maximum interval between two connection
* events allowed for the connection. It shall be greater than or equal to
* connection_interval_min. This value shall be in range [0x0006 : 0x0C80]
* and is in unit of 1.25ms.
*
* @param connection_latency Number of connection events the slave can drop
* if it has nothing to communicate to the master. This value shall be in
* the range [0x0000 : 0x01F3].
*
* @param supervision_timeout Link supervision timeout for the connection.
* It shall be larger than:
* (1 + connection_latency) * connection_interval_max * 2
* Note: connection_interval_max is in ms in this formulae.
* Everytime the master or the slave receive a valid packet from the peer,
* the supervision timer is reset. If the supervision timer reaches
* supervision_timeout then the connection is considered lost and a
* disconnect event shall be emmited.
* This value shall be in the range [0x000A : 0x0C80] and is in unit of 10
* ms.
*
* @param minimum_connection_event_length Informative parameter of the
* minimum length a connection event. It shall be less than or equal to
* maximum_connection_event_length. It shall be in the range
* [0x0000 : 0xFFFF]. It should also be less than the expected connection
* interval. The unit is 0.625ms.
*
* @param maximum_connection_event_length Informative parameter of the
* maximum length a connection event. It shall be more than or equal to
* minimum_connection_event_length. It shall be in the range
* [0x0000 : 0xFFFF]. It should also be less than the expected connection
* interval. The unit is 0.625ms.
*
* @return BLE_ERROR_NONE if the request has been successfully sent or the
* appropriate error otherwise.
*
* @note: See Bluetooth 5 Vol 2 PartE: 7.8.12 LE create connection command.
*/
virtual ble_error_t create_connection(
uint16_t scan_interval,
uint16_t scan_window,
initiator_policy_t initiator_policy,
connection_peer_address_type_t peer_address_type,
const address_t& peer_address,
own_address_type_t own_address_type,
uint16_t connection_interval_min,
uint16_t connection_interval_max,
uint16_t connection_latency,
uint16_t supervision_timeout,
uint16_t minimum_connection_event_length,
uint16_t maximum_connection_event_length
) = 0;
/**
* Cancel the ongoing connection creation process.
*
* @return BLE_ERROR_NONE if the request has been successfully sent or the
* appropriate error otherwise.
*
* @note: See Bluetooth 5 Vol 2 PartE: 7.8.13 LE create connection cancel
* command.
*/
virtual ble_error_t cancel_connection_creation() = 0;
/**
* Return the number of total whitelist entries that can be stored in the
* le subsystem.
*
* @note The value returned can change over time.
*
* @return The number of entries that can be stored in the LE subsystem. It
* range from 0x01 to 0xFF.
*
* @note: See Bluetooth 5 Vol 2 PartE: 7.8.14 LE read white list size
* command.
*/
virtual uint8_t read_white_list_capacity() = 0;
/**
* Clear the whitelist stored in the LE subsystem.
*
* @attention This command shall not be issued if the whitelist is being
* used by the advertising, scanning or connection creation procedure.
*
* @return BLE_ERROR_NONE if the request has been successfully sent or the
* appropriate error otherwise.
*
* @note: See Bluetooth 5 Vol 2 PartE: 7.8.15 LE clear white list command.
*/
virtual ble_error_t clear_whitelist() = 0;
/**
* Add a device to the LE subsystem Whitelist.
*
* @param address_type address_type Type of the address to add in the
* whitelist.
*
* @param address Address of the device.
*
* @return BLE_ERROR_NONE if the request has been successfully sent or the
* appropriate error otherwise.
*
* @attention This command shall not be issued if the whitelist is being
* used by the advertising, scanning or connection creation procedure.
*
* @note: See Bluetooth 5 Vol 2 PartE: 7.8.16 LE add device to white list
* command.
*/
virtual ble_error_t add_device_to_whitelist(
whitelist_address_type_t address_type,
address_t address
) = 0;
/**
* Remove a device from the LE subsystem Whitelist.
*
* @param address_type address_type Type of the address of the device to
* remove from the whitelist.
*
* @param address Address of the device to remove from the whitelist
*
* @return BLE_ERROR_NONE if the request has been successfully sent or the
* appropriate error otherwise.
*
* @attention This command shall not be issued if the whitelist is being
* used by the advertising, scanning or connection creation procedure.
*
* @note: See Bluetooth 5 Vol 2 PartE: 7.8.17 LE remove device from white
* list command.
*/
virtual ble_error_t remove_device_from_whitelist(
whitelist_address_type_t address_type,
address_t address
) = 0;
/**
* Start a connection update procedure.
*
* This procedure change the parameter used for a connection it can be
* master or slave initiated.
*
* The peer will received a connection parameters request and will either
* accept or reject the new parameters for the connection.
*
* Once the peer response has been received, the procedure ends and a
* Connection update complete event is emmited.
*
* @param connection Handle of the connection.
*
* @param connection_interval_min Minimum interval between two connection
* events allowed for the connection. It shall be less than or equal to
* connection_interval_max. This value shall be in range [0x0006 : 0x0C80]
* and is in unit of 1.25ms.
*
* @param connection_interval_max Maximum interval between two connection
* events allowed for the connection. It shall be greater than or equal to
* connection_interval_min. This value shall be in range [0x0006 : 0x0C80]
* and is in unit of 1.25ms.
*
* @param connection_latency Number of connection events the slave can drop
* if it has nothing to communicate to the master. This value shall be in
* the range [0x0000 : 0x01F3].
*
* @param supervision_timeout Link supervision timeout for the connection.
* It shall be larger than:
* (1 + connection_latency) * connection_interval_max * 2
* Note: connection_interval_max is in ms in this formulae.
* Everytime the master or the slave receive a valid packet from the peer,
* the supervision timer is reset. If the supervision timer reaches
* supervision_timeout then the connection is considered lost and a
* disconnect event shall be emmited.
* This value shall be in the range [0x000A : 0x0C80] and is in unit of 10
* ms.
*
* @param minimum_connection_event_length Informative parameter of the
* minimum length a connection event. It shall be less than or equal to
* maximum_connection_event_length. It shall be in the range
* [0x0000 : 0xFFFF]. It should also be less than the expected connection
* interval. The unit is 0.625ms.
*
* @param maximum_connection_event_length Informative parameter of the
* maximum length a connection event. It shall be more than or equal to
* minimum_connection_event_length. It shall be in the range
* [0x0000 : 0xFFFF]. It should also be less than the expected connection
* interval. The unit is 0.625ms.
*
* @return BLE_ERROR_NONE if the request has been successfully sent or the
* appropriate error otherwise.
*
* @note: See Bluetooth 5 Vol 2 PartE: 7.8.18 LE Connection update command.
*
*/
virtual ble_error_t connection_parameters_update(
connection_handle_t connection,
uint16_t connection_interval_min,
uint16_t connection_interval_max,
uint16_t connection_latency,
uint16_t supervision_timeout,
uint16_t minimum_connection_event_length,
uint16_t maximum_connection_event_length
) = 0;
/**
* Accept connection parameter request.
*
* This command sends a positive response to a connection parameter request
* from a peer.
*
* @param connection Handle of the connection.
*
* @param connection_interval_min Minimum interval between two connection
* events allowed for the connection. It shall be less than or equal to
* connection_interval_max. This value shall be in range [0x0006 : 0x0C80]
* and is in unit of 1.25ms.
*
* @param connection_interval_max Maximum interval between two connection
* events allowed for the connection. It shall be greater than or equal to
* connection_interval_min. This value shall be in range [0x0006 : 0x0C80]
* and is in unit of 1.25ms.
*
* @param connection_latency Number of connection events the slave can drop
* if it has nothing to communicate to the master. This value shall be in
* the range [0x0000 : 0x01F3].
*
* @param supervision_timeout Link supervision timeout for the connection.
* It shall be larger than:
* (1 + connection_latency) * connection_interval_max * 2
* Note: connection_interval_max is in ms in this formulae.
* Everytime the master or the slave receive a valid packet from the peer,
* the supervision timer is reset. If the supervision timer reaches
* supervision_timeout then the connection is considered lost and a
* disconnect event shall be emmited.
* This value shall be in the range [0x000A : 0x0C80] and is in unit of 10
* ms.
*
* @param minimum_connection_event_length Informative parameter of the
* minimum length a connection event. It shall be less than or equal to
* maximum_connection_event_length. It shall be in the range
* [0x0000 : 0xFFFF]. It should also be less than the expected connection
* interval. The unit is 0.625ms.
*
* @param maximum_connection_event_length Informative parameter of the
* maximum length a connection event. It shall be more than or equal to
* minimum_connection_event_length. It shall be in the range
* [0x0000 : 0xFFFF]. It should also be less than the expected connection
* interval. The unit is 0.625ms.
*
* @note Usually parameters of this function match the connection parameters
* received in the connection parameter request event.
*
* @attention: Once the new connection parameters are in used a Connection
* Update Complete event shall be emmited.
*
* @return BLE_ERROR_NONE if the request has been successfully sent or the
* appropriate error otherwise.
*
* @note: See Bluetooth 5 Vol 2 PartE: 7.8.31 LE remote connection parameter
* request reply command.
*/
virtual ble_error_t accept_connection_parameter_request(
connection_handle_t connection_handle,
uint16_t interval_min,
uint16_t interval_max,
uint16_t latency,
uint16_t supervision_timeout,
uint16_t minimum_connection_event_length,
uint16_t maximum_connection_event_length
) = 0;
/**
* Reject a connection parameter update request.
*
* @param connection_handle handle to the peer which has issued the
* connection parameter request.
*
* @param rejection_reason Indicate to the peer why the proposed connection
* parameters were rejected.
*
* @return BLE_ERROR_NONE if the request has been successfully sent or the
* appropriate error otherwise.
*
* @note: See Bluetooth 5 Vol 2 PartE: 7.8.32 LE Remote Connection Parameter
* Request Negative Reply Command.
*/
virtual ble_error_t reject_connection_parameter_request(
connection_handle_t connection_handle,
hci_error_code_t rejection_reason
) = 0;
/**
* Start a disconnection procedure.
*
* Once the procedure is complete it should emit a disconnection complete
* event.
*
* @param connection Handle of the connection to terminate.
*
* @param disconnection_reason Indicates the reason for ending the
* connection.
*
* @return BLE_ERROR_NONE if the request has been successfully sent or the
* appropriate error otherwise.
*
* @note: See Bluetooth 5 Vol 2 PartE: 7.1.6 disconenct command.
*/
virtual ble_error_t disconnect(
connection_handle_t connection,
disconnection_reason_t disconnection_reason
) = 0;
/** Check if privacy feature is supported by implementation
*
* @return true if privacy is supported, false otherwise.
*
* @note: See Bluetooth 5 Vol 3 Part C: 10.7 Privacy feature.
*/
virtual bool is_privacy_supported() = 0;
/** Enable or disable private addresses resolution
*
* @param enable whether to enable private addresses resolution
*
* @return BLE_ERROR_NONE if the request has been successfully sent or the
* appropriate error otherwise.
*
* @note: See Bluetooth 5 Vol 2 PartE: 7.8.44 LE Set Address Resolution Enable command.
*/
virtual ble_error_t set_address_resolution(
bool enable
) = 0;
/**
* Register a callback which will handle Gap events.
*
* @param cb The callback object which will handle Gap events from the
* LE subsystem.
* It accept a single parameter in input: The event received.
*/
void when_gap_event_received(mbed::Callback<void(const GapEvent&)> cb)
{
_gap_event_cb = cb;
}
protected:
Gap() { }
virtual ~Gap() { }
/**
* Implementation shall call this function whenever the LE subsystem
* generate a Gap event.
*
* @param gap_event The event to emit to higher layer.
*/
void emit_gap_event(const GapEvent& gap_event)
{
if (_gap_event_cb) {
_gap_event_cb(gap_event);
}
}
private:
/**
* Callback called when an event is emitted by the LE subsystem.
*/
mbed::Callback<void(const GapEvent&)> _gap_event_cb;
// Disallow copy construction and copy assignment.
Gap(const Gap&);
Gap& operator=(const Gap&);
};
} // namespace pal
} // namespace ble
#endif /* BLE_PAL_GAP_H_ */
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