ble.cpp

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#include "ble.h"
 
#ifdef USE_ESP32
 
#include "esphome/core/application.h"
#include "esphome/core/helpers.h"
#include "esphome/core/log.h"
 
#ifndef CONFIG_BT_CONTROLLER_DISABLED
#include <esp_bt.h>
#else
#include "esphome/components/watchdog/watchdog.h"
#include <cinttypes>
extern "C" {
#include <esp_hosted.h>
#ifndef CONFIG_ESP_HOSTED_HOST_FEAT_BT
#include <esp_hosted_misc.h>
#include <esp_hosted_bluedroid.h>
#endif
}
#ifdef CONFIG_ESP_HOSTED_HOST_FEAT_BT
#include <esp_hosted_bt_host_stack.h>
#endif
#endif
#include <esp_bt_device.h>
#include <esp_bt_main.h>
#include <esp_gap_ble_api.h>
#include <freertos/FreeRTOS.h>
#include <freertos/FreeRTOSConfig.h>
#include <freertos/task.h>
#include <nvs_flash.h>
 
#ifdef USE_ARDUINO
// Prevent Arduino from releasing BT memory at startup (esp32-hal-misc.c).
// Without this, esp_bt_controller_init() fails with ESP_ERR_INVALID_STATE.
extern "C" bool btInUse() { return true; }  // NOLINT(readability-identifier-naming)
#endif
 
namespace esphome::esp32_ble {
 
static const char *const TAG = "esp32_ble";
 
#ifdef CONFIG_BT_CONTROLLER_DISABLED
// Bringing up the remote BT controller issues synchronous RPCs to the
// co-processor with 5 second response timeouts, and the default task watchdog
// is also 5 seconds. If the co-processor firmware does not answer (for example
// factory firmware without Bluetooth support), the watchdog would reboot the
// device before the RPC could return an error, causing a boot loop. Raise the
// watchdog for the duration of the bring-up so failures surface as error
// returns instead. 60 seconds covers the worst case: transport reconnect
// (up to ~20s), version preflight (1s), the controller init retry window
// (5s of 5s RPCs), controller enable (5s) and the bluedroid host bring-up
// over the hosted HCI transport.
static constexpr uint32_t HOSTED_BT_WDT_TIMEOUT_MS = 60000;
#endif
 
// GAP event groups for deduplication across gap_event_handler and dispatch_gap_event_
#define GAP_SCAN_COMPLETE_EVENTS \
  case ESP_GAP_BLE_SCAN_PARAM_SET_COMPLETE_EVT: \
  case ESP_GAP_BLE_SCAN_START_COMPLETE_EVT: \
  case ESP_GAP_BLE_SCAN_STOP_COMPLETE_EVT
 
#define GAP_ADV_COMPLETE_EVENTS \
  case ESP_GAP_BLE_ADV_DATA_SET_COMPLETE_EVT: \
  case ESP_GAP_BLE_SCAN_RSP_DATA_SET_COMPLETE_EVT: \
  case ESP_GAP_BLE_ADV_DATA_RAW_SET_COMPLETE_EVT: \
  case ESP_GAP_BLE_SCAN_RSP_DATA_RAW_SET_COMPLETE_EVT: \
  case ESP_GAP_BLE_ADV_START_COMPLETE_EVT: \
  case ESP_GAP_BLE_ADV_STOP_COMPLETE_EVT
 
#define GAP_SECURITY_EVENTS \
  case ESP_GAP_BLE_AUTH_CMPL_EVT: \
  case ESP_GAP_BLE_SEC_REQ_EVT: \
  case ESP_GAP_BLE_PASSKEY_NOTIF_EVT: \
  case ESP_GAP_BLE_PASSKEY_REQ_EVT: \
  case ESP_GAP_BLE_NC_REQ_EVT
 
void ESP32BLE::setup() {
  global_ble = this;
  if (!ble_pre_setup_()) {
    ESP_LOGE(TAG, "BLE could not be prepared for configuration");
    this->mark_failed();
    return;
  }
 
  this->state_ = BLE_COMPONENT_STATE_DISABLED;
  if (this->enable_on_boot_) {
    this->enable();
  }
}
 
// Queue the transition for loop(). A pending transition the other way is
// cancelled instead, since nothing was torn down or brought up yet; any other
// state is already there or on its way.
void ESP32BLE::request_state_(bool enable) {
  if (enable) {
    if (this->state_ == BLE_COMPONENT_STATE_DISABLED) {
      this->state_ = BLE_COMPONENT_STATE_ENABLE;
    } else if (this->state_ == BLE_COMPONENT_STATE_DISABLE) {
      this->state_ = BLE_COMPONENT_STATE_ACTIVE;
    }
  } else {
    if (this->state_ == BLE_COMPONENT_STATE_ACTIVE) {
      this->state_ = BLE_COMPONENT_STATE_DISABLE;
    } else if (this->state_ == BLE_COMPONENT_STATE_ENABLE) {
      this->state_ = BLE_COMPONENT_STATE_DISABLED;
    }
  }
}
 
#ifdef USE_ESP32_BLE_ADVERTISING
void ESP32BLE::advertising_start() {
  this->advertising_init_();
  this->advertising_ref_count_++;
  this->advertising_refresh();
}
 
void ESP32BLE::advertising_stop() {
  if (this->advertising_ref_count_ == 0)
    return;
  this->advertising_ref_count_--;
  this->advertising_refresh();
}
 
void ESP32BLE::advertising_refresh() {
  if (this->advertising_ == nullptr || !this->is_active())
    return;
  // Advertise while any component still needs it, otherwise stop
  if (this->advertising_ref_count_ == 0) {
    this->advertising_->stop();
  } else {
    this->advertising_->start();
  }
}
 
void ESP32BLE::advertising_set_service_data(const std::vector<uint8_t> &data) {
  this->advertising_init_();
  this->advertising_->set_service_data(data);
  this->advertising_refresh();
}
 
void ESP32BLE::advertising_set_manufacturer_data(const std::vector<uint8_t> &data) {
  this->advertising_init_();
  this->advertising_->set_manufacturer_data(data);
  this->advertising_refresh();
}
 
void ESP32BLE::advertising_set_service_data_and_name(std::span<const uint8_t> data, bool include_name) {
  // This method atomically updates both service data and device name inclusion in BLE advertising.
  // When include_name is true, the device name is included in the advertising packet making it
  // visible to passive BLE scanners. When false, the name is only visible in scan response
  // (requires active scanning). This atomic operation ensures we only restart advertising once
  // when changing both properties, avoiding the brief gap that would occur with separate calls.
 
  this->advertising_init_();
 
  if (include_name) {
    // When including name, clear service data first to avoid packet overflow
    this->advertising_->set_service_data(std::span<const uint8_t>{});
    this->advertising_->set_include_name(true);
  } else {
    // When including service data, clear name first to avoid packet overflow
    this->advertising_->set_include_name(false);
    this->advertising_->set_service_data(data);
  }
 
  this->advertising_refresh();
}
 
void ESP32BLE::advertising_register_raw_advertisement_callback(std::function<void(bool)> &&callback) {
  this->advertising_init_();
  this->advertising_->register_raw_advertisement_callback(std::move(callback));
}
 
void ESP32BLE::advertising_add_service_uuid(ESPBTUUID uuid) {
  this->advertising_init_();
  this->advertising_->add_service_uuid(uuid);
  this->advertising_refresh();
}
 
void ESP32BLE::advertising_remove_service_uuid(ESPBTUUID uuid) {
  this->advertising_init_();
  this->advertising_->remove_service_uuid(uuid);
  this->advertising_refresh();
}
#endif
 
bool ESP32BLE::ble_pre_setup_() {
  esp_err_t err = nvs_flash_init();
  if (err != ESP_OK) {
    ESP_LOGE(TAG, "nvs_flash_init failed: %d", err);
    return false;
  }
  return true;
}
 
#ifdef USE_ESP32_BLE_ADVERTISING
void ESP32BLE::advertising_init_() {
  if (this->advertising_ != nullptr)
    return;
  this->advertising_ = new BLEAdvertising(this->advertising_cycle_time_);  // NOLINT(cppcoreguidelines-owning-memory)
 
  this->advertising_->set_scan_response(true);
  this->advertising_->set_min_preferred_interval(0x06);
  this->advertising_->set_appearance(this->appearance_);
}
#endif
 
bool ESP32BLE::ble_setup_() {
  esp_err_t err;
#ifdef CONFIG_BT_CONTROLLER_DISABLED
  watchdog::WatchdogManager wdt(HOSTED_BT_WDT_TIMEOUT_MS);
#endif
#ifndef CONFIG_BT_CONTROLLER_DISABLED
  if (esp_bt_controller_get_status() != ESP_BT_CONTROLLER_STATUS_ENABLED) {
    // start bt controller
    if (esp_bt_controller_get_status() == ESP_BT_CONTROLLER_STATUS_IDLE) {
      esp_bt_controller_config_t cfg = BT_CONTROLLER_INIT_CONFIG_DEFAULT();
      err = esp_bt_controller_init(&cfg);
      if (err != ESP_OK) {
        ESP_LOGE(TAG, "esp_bt_controller_init failed: %s", esp_err_to_name(err));
        return false;
      }
      while (esp_bt_controller_get_status() == ESP_BT_CONTROLLER_STATUS_IDLE)
        ;
    }
    if (esp_bt_controller_get_status() == ESP_BT_CONTROLLER_STATUS_INITED) {
      err = esp_bt_controller_enable(ESP_BT_MODE_BLE);
      if (err != ESP_OK) {
        ESP_LOGE(TAG, "esp_bt_controller_enable failed: %s", esp_err_to_name(err));
        return false;
      }
    }
    if (esp_bt_controller_get_status() != ESP_BT_CONTROLLER_STATUS_ENABLED) {
      ESP_LOGE(TAG, "esp bt controller enable failed");
      return false;
    }
  }
 
  esp_bt_controller_mem_release(ESP_BT_MODE_CLASSIC_BT);
#else
  if (esp_hosted_connect_to_slave() != ESP_OK) {  // NOLINT
    ESP_LOGE(TAG, "Co-processor transport failed; BLE disabled");
    return false;
  }
 
  // Fast preflight (1 second RPC timeout): verifies the co-processor answers
  // RPCs at all before the 5 second timeout BT controller RPCs below.
  esp_hosted_coprocessor_fwver_t fw_ver{};
  if (esp_hosted_get_coprocessor_fwversion(&fw_ver) != ESP_OK) {
    ESP_LOGE(TAG, "Co-processor not responding; BLE disabled. Update its firmware with the esp32_hosted "
                  "update component");
    return false;
  }
  ESP_LOGD(TAG, "Co-processor firmware %" PRIu32 ".%" PRIu32 ".%" PRIu32, fw_ver.major1, fw_ver.minor1, fw_ver.patch1);
 
#ifdef CONFIG_ESP_HOSTED_HOST_FEAT_BT
  esp_hosted_bt_host_stack_cfg_t bt_cfg{};
  bt_cfg.stack = ESP_HOSTED_BT_HOST_STACK_BLUEDROID;
  bt_cfg.bring_up_controller = true;
  bt_cfg.controller_ready_timeout_ms = EH_BT_CTRL_DEFAULT_READY_TIMEOUT_MS;
  if (esp_hosted_bt_host_stack_setup(&bt_cfg) != ESP_OK) {
    ESP_LOGE(TAG,
             "BT controller bring-up failed; co-processor firmware %" PRIu32 ".%" PRIu32 ".%" PRIu32
             " may lack BT support. Update it with the esp32_hosted update component; BLE disabled",
             fw_ver.major1, fw_ver.minor1, fw_ver.patch1);
    return false;
  }
#else
  if (esp_hosted_bt_controller_init() != ESP_OK) {
    ESP_LOGE(TAG,
             "BT controller init failed; co-processor firmware %" PRIu32 ".%" PRIu32 ".%" PRIu32
             " may lack BT support. Update it with the esp32_hosted update component; BLE disabled",
             fw_ver.major1, fw_ver.minor1, fw_ver.patch1);
    return false;
  }
 
  if (esp_hosted_bt_controller_enable() != ESP_OK) {
    ESP_LOGE(TAG,
             "BT controller enable failed; co-processor firmware %" PRIu32 ".%" PRIu32 ".%" PRIu32
             " may lack BT support. Update it with the esp32_hosted update component; BLE disabled",
             fw_ver.major1, fw_ver.minor1, fw_ver.patch1);
    return false;
  }
 
  hosted_hci_bluedroid_open();
 
  esp_bluedroid_hci_driver_operations_t operations = {
      .send = hosted_hci_bluedroid_send,
      .check_send_available = hosted_hci_bluedroid_check_send_available,
      .register_host_callback = hosted_hci_bluedroid_register_host_callback,
  };
  esp_bluedroid_attach_hci_driver(&operations);
#endif
#endif
 
  err = esp_bluedroid_init();
  if (err != ESP_OK) {
    ESP_LOGE(TAG, "esp_bluedroid_init failed: %d", err);
    return false;
  }
  err = esp_bluedroid_enable();
  if (err != ESP_OK) {
    ESP_LOGE(TAG, "esp_bluedroid_enable failed: %d", err);
    return false;
  }
 
#ifdef ESPHOME_ESP32_BLE_GAP_EVENT_HANDLER_COUNT
  err = esp_ble_gap_register_callback(ESP32BLE::gap_event_handler);
  if (err != ESP_OK) {
    ESP_LOGE(TAG, "esp_ble_gap_register_callback failed: %d", err);
    return false;
  }
#endif
 
#if defined(USE_ESP32_BLE_SERVER) && defined(ESPHOME_ESP32_BLE_GATTS_EVENT_HANDLER_COUNT)
  err = esp_ble_gatts_register_callback(ESP32BLE::gatts_event_handler);
  if (err != ESP_OK) {
    ESP_LOGE(TAG, "esp_ble_gatts_register_callback failed: %d", err);
    return false;
  }
#endif
 
#if defined(USE_ESP32_BLE_CLIENT) && defined(ESPHOME_ESP32_BLE_GATTC_EVENT_HANDLER_COUNT)
  err = esp_ble_gattc_register_callback(ESP32BLE::gattc_event_handler);
  if (err != ESP_OK) {
    ESP_LOGE(TAG, "esp_ble_gattc_register_callback failed: %d", err);
    return false;
  }
#endif
 
  // BLE device names are limited to 20 characters
  // Buffer: 20 chars + null terminator
  constexpr size_t ble_name_max_len = 21;
  char name_buffer[ble_name_max_len];
  const char *device_name;
 
  if (this->name_ != nullptr) {
    if (App.is_name_add_mac_suffix_enabled()) {
      // MAC address suffix length (last 6 characters of 12-char MAC address string)
      constexpr size_t mac_address_suffix_len = 6;
      char mac_addr[MAC_ADDRESS_BUFFER_SIZE];
      get_mac_address_into_buffer(mac_addr);
      const char *mac_suffix_ptr = mac_addr + mac_address_suffix_len;
      make_name_with_suffix_to(name_buffer, sizeof(name_buffer), this->name_, strlen(this->name_), '-', mac_suffix_ptr,
                               mac_address_suffix_len);
      device_name = name_buffer;
    } else {
      device_name = this->name_;
    }
  } else {
    const auto &app_name = App.get_name();
    size_t name_len = app_name.length();
    if (name_len > 20) {
      if (App.is_name_add_mac_suffix_enabled()) {
        // Keep first 13 chars and last 7 chars (MAC suffix), remove middle
        memcpy(name_buffer, app_name.c_str(), 13);
        memcpy(name_buffer + 13, app_name.c_str() + name_len - 7, 7);
      } else {
        memcpy(name_buffer, app_name.c_str(), 20);
      }
      name_buffer[20] = '\0';
    } else {
      memcpy(name_buffer, app_name.c_str(), name_len + 1);  // Include null terminator
    }
    device_name = name_buffer;
  }
 
  err = esp_ble_gap_set_device_name(device_name);
  if (err != ESP_OK) {
    ESP_LOGE(TAG, "esp_ble_gap_set_device_name failed: %d", err);
    return false;
  }
 
  err = esp_ble_gap_set_security_param(ESP_BLE_SM_IOCAP_MODE, &(this->io_cap_), sizeof(esp_ble_io_cap_t));
  if (err != ESP_OK) {
    ESP_LOGE(TAG, "esp_ble_gap_set_security_param iocap_mode failed: %d", err);
    return false;
  }
 
#ifdef ESPHOME_ESP32_BLE_EXTENDED_AUTH_PARAMS
  if (this->max_key_size_) {
    err = esp_ble_gap_set_security_param(ESP_BLE_SM_MAX_KEY_SIZE, &(this->max_key_size_), sizeof(uint8_t));
    if (err != ESP_OK) {
      ESP_LOGE(TAG, "esp_ble_gap_set_security_param max_key_size failed: %d", err);
      return false;
    }
  }
 
  if (this->min_key_size_) {
    err = esp_ble_gap_set_security_param(ESP_BLE_SM_MIN_KEY_SIZE, &(this->min_key_size_), sizeof(uint8_t));
    if (err != ESP_OK) {
      ESP_LOGE(TAG, "esp_ble_gap_set_security_param min_key_size failed: %d", err);
      return false;
    }
  }
 
  if (this->auth_req_mode_) {
    err = esp_ble_gap_set_security_param(ESP_BLE_SM_AUTHEN_REQ_MODE, &(this->auth_req_mode_.value()),
                                         sizeof(esp_ble_auth_req_t));
    if (err != ESP_OK) {
      ESP_LOGE(TAG, "esp_ble_gap_set_security_param authen_req_mode failed: %d", err);
      return false;
    }
  }
#endif  // ESPHOME_ESP32_BLE_EXTENDED_AUTH_PARAMS
 
  // BLE takes some time to be fully set up, 200ms should be more than enough
  delay(200);  // NOLINT
 
  return true;
}
 
bool ESP32BLE::ble_dismantle_() {
#ifdef CONFIG_BT_CONTROLLER_DISABLED
  // Same 5 second RPCs as the bring-up path; see HOSTED_BT_WDT_TIMEOUT_MS
  watchdog::WatchdogManager wdt(HOSTED_BT_WDT_TIMEOUT_MS);
#endif
  esp_err_t err = esp_bluedroid_disable();
  if (err != ESP_OK) {
    // ESP_ERR_INVALID_STATE means Bluedroid is already disabled, which is fine
    if (err != ESP_ERR_INVALID_STATE) {
      ESP_LOGE(TAG, "esp_bluedroid_disable failed: %d", err);
      return false;
    }
    ESP_LOGD(TAG, "Already disabled");
  }
  err = esp_bluedroid_deinit();
  if (err != ESP_OK) {
    // ESP_ERR_INVALID_STATE means Bluedroid is already deinitialized, which is fine
    if (err != ESP_ERR_INVALID_STATE) {
      ESP_LOGE(TAG, "esp_bluedroid_deinit failed: %d", err);
      return false;
    }
    ESP_LOGD(TAG, "Already deinitialized");
  }
 
#ifndef CONFIG_BT_CONTROLLER_DISABLED
  if (esp_bt_controller_get_status() != ESP_BT_CONTROLLER_STATUS_IDLE) {
    // stop bt controller
    if (esp_bt_controller_get_status() == ESP_BT_CONTROLLER_STATUS_ENABLED) {
      err = esp_bt_controller_disable();
      if (err != ESP_OK) {
        ESP_LOGE(TAG, "esp_bt_controller_disable failed: %s", esp_err_to_name(err));
        return false;
      }
      while (esp_bt_controller_get_status() == ESP_BT_CONTROLLER_STATUS_ENABLED)
        ;
    }
    if (esp_bt_controller_get_status() == ESP_BT_CONTROLLER_STATUS_INITED) {
      err = esp_bt_controller_deinit();
      if (err != ESP_OK) {
        ESP_LOGE(TAG, "esp_bt_controller_deinit failed: %s", esp_err_to_name(err));
        return false;
      }
    }
    if (esp_bt_controller_get_status() != ESP_BT_CONTROLLER_STATUS_IDLE) {
      ESP_LOGE(TAG, "esp bt controller disable failed");
      return false;
    }
  }
#elif defined(CONFIG_ESP_HOSTED_HOST_FEAT_BT)
  if (esp_hosted_bt_host_stack_teardown() != ESP_OK) {
    ESP_LOGE(TAG, "esp_hosted_bt_host_stack_teardown failed");
    return false;
  }
#else
  if (esp_hosted_bt_controller_disable() != ESP_OK) {
    ESP_LOGE(TAG, "esp_hosted_bt_controller_disable failed");
    return false;
  }
 
  if (esp_hosted_bt_controller_deinit(false) != ESP_OK) {
    ESP_LOGE(TAG, "esp_hosted_bt_controller_deinit failed");
    return false;
  }
 
  hosted_hci_bluedroid_close();
#endif
  return true;
}
 
void ESP32BLE::loop() {
  if (this->state_ != BLE_COMPONENT_STATE_ACTIVE) {
    this->loop_handle_state_transition_not_active_();
    return;
  }
 
#ifdef USE_ESP32_BLE_ADVERTISING
  if (this->advertising_ != nullptr) {
    this->advertising_->loop();
  }
#endif
 
  BLEEvent *ble_event = this->ble_events_.pop();
  if (ble_event == nullptr)
    return;
 
  do {
    switch (ble_event->type_) {
#if defined(USE_ESP32_BLE_SERVER) && defined(ESPHOME_ESP32_BLE_GATTS_EVENT_HANDLER_COUNT)
      case BLEEvent::GATTS: {
        esp_gatts_cb_event_t event = ble_event->event_.gatts.gatts_event;
        esp_gatt_if_t gatts_if = ble_event->event_.gatts.gatts_if;
        esp_ble_gatts_cb_param_t *param = &ble_event->event_.gatts.gatts_param;
        ESP_LOGV(TAG, "gatts_event [esp_gatt_if: %d] - %d", gatts_if, event);
        this->gatts_event_callbacks_.call(event, gatts_if, param);
        break;
      }
#endif
#if defined(USE_ESP32_BLE_CLIENT) && defined(ESPHOME_ESP32_BLE_GATTC_EVENT_HANDLER_COUNT)
      case BLEEvent::GATTC: {
        esp_gattc_cb_event_t event = ble_event->event_.gattc.gattc_event;
        esp_gatt_if_t gattc_if = ble_event->event_.gattc.gattc_if;
        esp_ble_gattc_cb_param_t *param = &ble_event->event_.gattc.gattc_param;
        ESP_LOGV(TAG, "gattc_event [esp_gatt_if: %d] - %d", gattc_if, event);
        this->gattc_event_callbacks_.call(event, gattc_if, param);
        break;
      }
#endif
      case BLEEvent::GAP: {
        esp_gap_ble_cb_event_t gap_event = ble_event->event_.gap.gap_event;
        switch (gap_event) {
          case ESP_GAP_BLE_SCAN_RESULT_EVT:
#ifdef ESPHOME_ESP32_BLE_GAP_SCAN_EVENT_HANDLER_COUNT
            this->gap_scan_event_callbacks_.call(ble_event->scan_result());
#endif
            break;
 
          // Scan complete events
          GAP_SCAN_COMPLETE_EVENTS:
          // Advertising complete events
          GAP_ADV_COMPLETE_EVENTS:
          // RSSI complete event
          case ESP_GAP_BLE_READ_RSSI_COMPLETE_EVT:
          // Security events
          GAP_SECURITY_EVENTS:
            ESP_LOGV(TAG, "gap_event_handler - %d", gap_event);
#ifdef ESPHOME_ESP32_BLE_GAP_EVENT_HANDLER_COUNT
            {
              esp_ble_gap_cb_param_t *param = NULL;
              // clang-format off
              switch (gap_event) {
                // All three scan complete events have the same structure with just status
                // The scan_complete struct matches ESP-IDF's layout exactly, so this reinterpret_cast is safe
                // This is verified at compile-time by static_assert checks in ble_event.h
                // The struct already contains our copy of the status (copied in BLEEvent constructor)
                GAP_SCAN_COMPLETE_EVENTS:
                  param = reinterpret_cast<esp_ble_gap_cb_param_t *>(&ble_event->event_.gap.scan_complete);
                  break;
 
                // All advertising complete events have the same structure with just status
                GAP_ADV_COMPLETE_EVENTS:
                  param = reinterpret_cast<esp_ble_gap_cb_param_t *>(&ble_event->event_.gap.adv_complete);
                  break;
 
                case ESP_GAP_BLE_READ_RSSI_COMPLETE_EVT:
                  param = reinterpret_cast<esp_ble_gap_cb_param_t *>(&ble_event->event_.gap.read_rssi_complete);
                  break;
 
                GAP_SECURITY_EVENTS:
                  param = reinterpret_cast<esp_ble_gap_cb_param_t *>(&ble_event->event_.gap.security);
                  break;
 
                default:
                  break;
              }
              // clang-format on
              // Dispatch to all registered handlers
              this->gap_event_callbacks_.call(gap_event, param);
            }
#endif
            break;
 
          default:
            // Unknown/unhandled event
            ESP_LOGW(TAG, "Unhandled GAP event type in loop: %d", gap_event);
            break;
        }
        break;
      }
      default:
        break;
    }
    // Return the event to the pool
    this->ble_event_pool_.release(ble_event);
  } while ((ble_event = this->ble_events_.pop()) != nullptr);
 
  // Log dropped events - only reachable when events were processed.
  // Drops only occur when the queue is full, and only this loop drains it,
  // so if pop() returned nullptr above we can skip this check (saves a memw).
  uint16_t dropped = this->ble_events_.get_and_reset_dropped_count();
  if (dropped > 0) {
    ESP_LOGW(TAG, "Dropped %u BLE events due to buffer overflow", dropped);
  }
}
 
void ESP32BLE::loop_handle_state_transition_not_active_() {
  // Caller ensures state_ != ACTIVE
  if (this->state_ == BLE_COMPONENT_STATE_DISABLE) {
    ESP_LOGD(TAG, "Disabling");
 
#ifdef ESPHOME_ESP32_BLE_BLE_STATUS_EVENT_HANDLER_COUNT
    this->ble_status_event_callbacks_.call();
#endif
 
    if (!ble_dismantle_()) {
      ESP_LOGE(TAG, "Could not be dismantled");
      this->mark_failed();
      return;
    }
    this->drain_ble_events_();
    // A status callback may have asked for BLE back; the stack is down now, so
    // that request becomes a bring-up.
    this->state_ =
        this->state_ == BLE_COMPONENT_STATE_ACTIVE ? BLE_COMPONENT_STATE_ENABLE : BLE_COMPONENT_STATE_DISABLED;
  } else if (this->state_ == BLE_COMPONENT_STATE_ENABLE) {
    ESP_LOGD(TAG, "Enabling");
    this->state_ = BLE_COMPONENT_STATE_OFF;
 
    if (!ble_setup_()) {
      ESP_LOGE(TAG, "Could not be set up");
      this->mark_failed();
      return;
    }
 
    this->state_ = BLE_COMPONENT_STATE_ACTIVE;
#ifdef USE_ESP32_BLE_ADVERTISING
    // Requests made before the stack was up (or before it was re-enabled) take effect now
    this->advertising_refresh();
#endif
  }
}
 
// Helper function to load new event data based on type
void load_ble_event(BLEEvent *event, esp_gap_ble_cb_event_t e, esp_ble_gap_cb_param_t *p) {
  event->load_gap_event(e, p);
}
 
#ifdef USE_ESP32_BLE_CLIENT
void load_ble_event(BLEEvent *event, esp_gattc_cb_event_t e, esp_gatt_if_t i, esp_ble_gattc_cb_param_t *p) {
  event->load_gattc_event(e, i, p);
}
#endif
 
#ifdef USE_ESP32_BLE_SERVER
void load_ble_event(BLEEvent *event, esp_gatts_cb_event_t e, esp_gatt_if_t i, esp_ble_gatts_cb_param_t *p) {
  event->load_gatts_event(e, i, p);
}
#endif
 
template<typename... Args> void enqueue_ble_event(Args... args) {
  // Allocate an event from the pool
  BLEEvent *event = global_ble->ble_event_pool_.allocate();
  if (event == nullptr) {
    // No events available - queue is full or we're out of memory
    global_ble->ble_events_.increment_dropped_count();
    return;
  }
 
  // Load new event data (replaces previous event)
  load_ble_event(event, args...);
 
  // Push the event to the queue
  // Push always succeeds: pool is sized to queue capacity (N-1), so if
  // allocate() returned non-null, the queue is guaranteed to have room.
  global_ble->ble_events_.push(event);
}
 
// Explicit template instantiations for the friend function
template void enqueue_ble_event(esp_gap_ble_cb_event_t, esp_ble_gap_cb_param_t *);
#ifdef USE_ESP32_BLE_SERVER
template void enqueue_ble_event(esp_gatts_cb_event_t, esp_gatt_if_t, esp_ble_gatts_cb_param_t *);
#endif
#ifdef USE_ESP32_BLE_CLIENT
template void enqueue_ble_event(esp_gattc_cb_event_t, esp_gatt_if_t, esp_ble_gattc_cb_param_t *);
#endif
 
void ESP32BLE::gap_event_handler(esp_gap_ble_cb_event_t event, esp_ble_gap_cb_param_t *param) {
  switch (event) {
    // Queue GAP events that components need to handle
    // Scanning events - used by esp32_ble_tracker
    case ESP_GAP_BLE_SCAN_RESULT_EVT:
    GAP_SCAN_COMPLETE_EVENTS:
    // Advertising events - used by esp32_ble_beacon and esp32_ble server
    GAP_ADV_COMPLETE_EVENTS:
    // Connection events - used by ble_client
    case ESP_GAP_BLE_READ_RSSI_COMPLETE_EVT:
      enqueue_ble_event(event, param);
      return;
 
    // Security events - used by ble_client and bluetooth_proxy
    // These are rare but interactive (pairing/bonding), so notify immediately
    GAP_SECURITY_EVENTS:
      enqueue_ble_event(event, param);
      // Wake up main loop to process security event immediately
      App.wake_loop_threadsafe();
      return;
 
    // Log the result of connection parameter updates: a peer can reject or
    // never answer an update, and without this the link silently stays on the
    // old parameters (visible only as unexplained supervision timeouts).
    case ESP_GAP_BLE_UPDATE_CONN_PARAMS_EVT: {
      if (param->update_conn_params.status != ESP_BT_STATUS_SUCCESS) {
        char mac_s[MAC_ADDRESS_PRETTY_BUFFER_SIZE];
        format_mac_addr_upper(param->update_conn_params.bda, mac_s);
        ESP_LOGW(TAG, "[%s] Conn param update failed, status=%d", mac_s, param->update_conn_params.status);
      }
#if ESPHOME_LOG_LEVEL >= ESPHOME_LOG_LEVEL_VERBOSE
      else {
        char mac_s[MAC_ADDRESS_PRETTY_BUFFER_SIZE];
        format_mac_addr_upper(param->update_conn_params.bda, mac_s);
        ESP_LOGV(TAG, "[%s] Conn params updated: interval=%u (x1.25ms) latency=%u timeout=%u (x10ms)", mac_s,
                 param->update_conn_params.conn_int, param->update_conn_params.latency,
                 param->update_conn_params.timeout);
      }
#endif
      return;
    }
 
    // Ignore these GAP events as they are not relevant for our use case
    case ESP_GAP_BLE_SET_PKT_LENGTH_COMPLETE_EVT:
    case ESP_GAP_BLE_PHY_UPDATE_COMPLETE_EVT:       // BLE 5.0 PHY update complete
    case ESP_GAP_BLE_CHANNEL_SELECT_ALGORITHM_EVT:  // BLE 5.0 channel selection algorithm
    case ESP_GAP_BLE_LOCAL_IR_EVT:                  // Local identity root key generated at security init
    case ESP_GAP_BLE_LOCAL_ER_EVT:                  // Local encryption root key generated at security init
      return;
 
    default:
      break;
  }
  ESP_LOGW(TAG, "Ignoring unexpected GAP event type: %d", event);
}
 
#ifdef USE_ESP32_BLE_SERVER
void ESP32BLE::gatts_event_handler(esp_gatts_cb_event_t event, esp_gatt_if_t gatts_if,
                                   esp_ble_gatts_cb_param_t *param) {
  enqueue_ble_event(event, gatts_if, param);
  // Wake up main loop to process GATT event immediately
  App.wake_loop_threadsafe();
}
#endif
 
#ifdef USE_ESP32_BLE_CLIENT
void ESP32BLE::gattc_event_handler(esp_gattc_cb_event_t event, esp_gatt_if_t gattc_if,
                                   esp_ble_gattc_cb_param_t *param) {
  enqueue_ble_event(event, gattc_if, param);
  // Wake up main loop to process GATT event immediately
  App.wake_loop_threadsafe();
}
#endif
 
void ESP32BLE::get_mac_msb_first(uint8_t out[MAC_ADDRESS_SIZE]) const {
  // The running stack owns the address (on hosted controllers it lives in
  // the remote chip's efuse); null before init becomes all-zero.
  const uint8_t *mac = esp_bt_dev_get_address();
  if (mac != nullptr) {
    memcpy(out, mac, MAC_ADDRESS_SIZE);
  } else {
    memset(out, 0, MAC_ADDRESS_SIZE);
  }
}
 
float ESP32BLE::get_setup_priority() const { return setup_priority::BLUETOOTH; }
 
void ESP32BLE::dump_config() {
  uint8_t mac_address[MAC_ADDRESS_SIZE];
  this->get_mac_msb_first(mac_address);
  if (mac_address_is_valid(mac_address)) {
    const char *io_capability_s;
    switch (this->io_cap_) {
      case ESP_IO_CAP_OUT:
        io_capability_s = "display_only";
        break;
      case ESP_IO_CAP_IO:
        io_capability_s = "display_yes_no";
        break;
      case ESP_IO_CAP_IN:
        io_capability_s = "keyboard_only";
        break;
      case ESP_IO_CAP_NONE:
        io_capability_s = "none";
        break;
      case ESP_IO_CAP_KBDISP:
        io_capability_s = "keyboard_display";
        break;
      default:
        io_capability_s = "invalid";
        break;
    }
 
    char mac_s[MAC_ADDRESS_PRETTY_BUFFER_SIZE];
    format_mac_addr_upper(mac_address, mac_s);
    ESP_LOGCONFIG(TAG,
                  "BLE:\n"
                  "  MAC address: %s\n"
                  "  IO Capability: %s",
                  mac_s, io_capability_s);
#ifdef USE_ESP32_BLE_PSRAM
    ESP_LOGCONFIG(TAG, "  PSRAM BLE allocation: enabled");
#endif
 
#ifdef ESPHOME_ESP32_BLE_EXTENDED_AUTH_PARAMS
    const char *auth_req_mode_s = "<default>";
    if (this->auth_req_mode_) {
      switch (this->auth_req_mode_.value()) {
        case AUTH_REQ_NO_BOND:
          auth_req_mode_s = "no_bond";
          break;
        case AUTH_REQ_BOND:
          auth_req_mode_s = "bond";
          break;
        case AUTH_REQ_MITM:
          auth_req_mode_s = "mitm";
          break;
        case AUTH_REQ_BOND_MITM:
          auth_req_mode_s = "bond_mitm";
          break;
        case AUTH_REQ_SC_ONLY:
          auth_req_mode_s = "sc_only";
          break;
        case AUTH_REQ_SC_BOND:
          auth_req_mode_s = "sc_bond";
          break;
        case AUTH_REQ_SC_MITM:
          auth_req_mode_s = "sc_mitm";
          break;
        case AUTH_REQ_SC_MITM_BOND:
          auth_req_mode_s = "sc_mitm_bond";
          break;
      }
    }
 
    ESP_LOGCONFIG(TAG, "  Auth Req Mode: %s", auth_req_mode_s);
    if (this->max_key_size_ && this->min_key_size_) {
      ESP_LOGCONFIG(TAG, "  Key Size: %u - %u", this->min_key_size_, this->max_key_size_);
    } else if (this->max_key_size_) {
      ESP_LOGCONFIG(TAG, "  Key Size: <default> - %u", this->max_key_size_);
    } else if (this->min_key_size_) {
      ESP_LOGCONFIG(TAG, "  Key Size: %u - <default>", this->min_key_size_);
    }
#endif  // ESPHOME_ESP32_BLE_EXTENDED_AUTH_PARAMS
 
  } else {
    ESP_LOGCONFIG(TAG, "Bluetooth stack is not enabled");
  }
}
 
ESP32BLE *global_ble = nullptr;  // NOLINT(cppcoreguidelines-avoid-non-const-global-variables)
 
}  // namespace esphome::esp32_ble
 
#endif