include/hardware/ble_scanner.h

/*
 * Copyright (C) 2016 The Android Open Source Project
 *
 * 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 ANDROID_INCLUDE_BLE_SCANNER_H
#define ANDROID_INCLUDE_BLE_SCANNER_H

#include <bluetooth/uuid.h>
#include <raw_address.h>
#include <stdint.h>

#include <memory>
#include <vector>

#include "bt_common_types.h"
#include "bt_gatt_client.h"
#include "bt_gatt_types.h"

/** Callback invoked when batchscan reports are obtained */
typedef void (*batchscan_reports_callback)(int client_if, int status,
                                           int report_format, int num_records,
                                           std::vector<uint8_t> data);

/** Callback invoked when batchscan storage threshold limit is crossed */
typedef void (*batchscan_threshold_callback)(int client_if);

/** Track ADV VSE callback invoked when tracked device is found or lost */
typedef void (*track_adv_event_callback)(
    btgatt_track_adv_info_t* p_track_adv_info);

/** Callback for scan results */
typedef void (*scan_result_callback)(uint16_t event_type, uint8_t addr_type,
                                     RawAddress* bda, uint8_t primary_phy,
                                     uint8_t secondary_phy,
                                     uint8_t advertising_sid, int8_t tx_power,
                                     int8_t rssi, uint16_t periodic_adv_int,
                                     std::vector<uint8_t> adv_data);

typedef struct {
  scan_result_callback scan_result_cb;
  batchscan_reports_callback batchscan_reports_cb;
  batchscan_threshold_callback batchscan_threshold_cb;
  track_adv_event_callback track_adv_event_cb;
} btgatt_scanner_callbacks_t;

class AdvertisingTrackInfo {
 public:
  uint8_t scanner_id;
  uint8_t filter_index;
  uint8_t advertiser_state;
  uint8_t advertiser_info_present;
  RawAddress advertiser_address;
  uint8_t advertiser_address_type;
  uint8_t tx_power;
  int8_t rssi;
  uint16_t time_stamp;
  uint8_t adv_packet_len;
  std::vector<uint8_t> adv_packet;
  uint8_t scan_response_len;
  std::vector<uint8_t> scan_response;
};

/**
 * LE Scanning related callbacks invoked from from the Bluetooth native stack
 * All callbacks are invoked on the JNI thread
 */
class ScanningCallbacks {
 public:
  virtual ~ScanningCallbacks() = default;
  virtual void OnScannerRegistered(const bluetooth::Uuid app_uuid,
                                   uint8_t scannerId, uint8_t status) = 0;
  virtual void OnSetScannerParameterComplete(uint8_t scannerId,
                                             uint8_t status) = 0;
  virtual void OnScanResult(uint16_t event_type, uint8_t addr_type,
                            RawAddress bda, uint8_t primary_phy,
                            uint8_t secondary_phy, uint8_t advertising_sid,
                            int8_t tx_power, int8_t rssi,
                            uint16_t periodic_adv_int,
                            std::vector<uint8_t> adv_data) = 0;
  virtual void OnTrackAdvFoundLost(
      AdvertisingTrackInfo advertising_track_info) = 0;
  virtual void OnBatchScanReports(int client_if, int status, int report_format,
                                  int num_records,
                                  std::vector<uint8_t> data) = 0;
  virtual void OnBatchScanThresholdCrossed(int client_if) = 0;
};

class BleScannerInterface {
 public:
  virtual ~BleScannerInterface() = default;

  using RegisterCallback =
      base::Callback<void(uint8_t /* scanner_id */, uint8_t /* btm_status */)>;

  using Callback = base::Callback<void(uint8_t /* btm_status */)>;

  using EnableCallback =
      base::Callback<void(uint8_t /* action */, uint8_t /* btm_status */)>;

  using FilterParamSetupCallback =
      base::Callback<void(uint8_t /* avbl_space */, uint8_t /* action_type */,
                          uint8_t /* btm_status */)>;

  using FilterConfigCallback =
      base::Callback<void(uint8_t /* filt_type */, uint8_t /* avbl_space */,
                          uint8_t /* action */, uint8_t /* btm_status */)>;

  /** Registers a scanner with the stack */
  virtual void RegisterScanner(const bluetooth::Uuid& app_uuid,
                               RegisterCallback) = 0;

  /** Unregister a scanner from the stack */
  virtual void Unregister(int scanner_id) = 0;

  /** Start or stop LE device scanning */
  virtual void Scan(bool start) = 0;

  /** Setup scan filter params */
  virtual void ScanFilterParamSetup(
      uint8_t client_if, uint8_t action, uint8_t filt_index,
      std::unique_ptr<btgatt_filt_param_setup_t> filt_param,
      FilterParamSetupCallback cb) = 0;

  /** Configure a scan filter condition  */
  virtual void ScanFilterAdd(int filter_index, std::vector<ApcfCommand> filters,
                             FilterConfigCallback cb) = 0;

  /** Clear all scan filter conditions for specific filter index*/
  virtual void ScanFilterClear(int filt_index, FilterConfigCallback cb) = 0;

  /** Enable / disable scan filter feature*/
  virtual void ScanFilterEnable(bool enable, EnableCallback cb) = 0;

  /** Sets the LE scan interval and window in units of N*0.625 msec */
  virtual void SetScanParameters(int scanner_id, int scan_interval,
                                 int scan_window, Callback cb) = 0;

  /* Configure the batchscan storage */
  virtual void BatchscanConfigStorage(int client_if, int batch_scan_full_max,
                                      int batch_scan_trunc_max,
                                      int batch_scan_notify_threshold,
                                      Callback cb) = 0;

  /* Enable batchscan */
  virtual void BatchscanEnable(int scan_mode, int scan_interval,
                               int scan_window, int addr_type, int discard_rule,
                               Callback cb) = 0;

  /* Disable batchscan */
  virtual void BatchscanDisable(Callback cb) = 0;

  /* Read out batchscan reports */
  virtual void BatchscanReadReports(int client_if, int scan_mode) = 0;

  using StartSyncCb =
      base::Callback<void(uint8_t status, uint16_t sync_handle,
                          uint8_t advertising_sid, uint8_t address_type,
                          RawAddress address, uint8_t phy, uint16_t interval)>;
  using SyncReportCb =
      base::Callback<void(uint16_t sync_handle, int8_t tx_power, int8_t rssi,
                          uint8_t status, std::vector<uint8_t> data)>;
  using SyncLostCb = base::Callback<void(uint16_t sync_handle)>;
  virtual void StartSync(uint8_t sid, RawAddress address, uint16_t skip,
                         uint16_t timeout, StartSyncCb start_cb,
                         SyncReportCb report_cb, SyncLostCb lost_cb) = 0;
  virtual void StopSync(uint16_t handle) = 0;

  virtual void RegisterCallbacks(ScanningCallbacks* callbacks) = 0;
};

#endif /* ANDROID_INCLUDE_BLE_SCANNER_H */