esp-idf/examples/bluetooth/blufi/main/blufi_init.c

/*
 * SPDX-FileCopyrightText: 2021-2025 Espressif Systems (Shanghai) CO LTD
 *
 * SPDX-License-Identifier: Unlicense OR CC0-1.0
 */

#include <stdio.h>
#include "esp_err.h"
#include "esp_blufi_api.h"
#include "esp_log.h"
#include "esp_blufi.h"
#include "blufi_example.h"
#if CONFIG_BT_CONTROLLER_ENABLED || !CONFIG_BT_NIMBLE_ENABLED
#include "esp_bt.h"
#endif
#ifdef CONFIG_BT_BLUEDROID_ENABLED
#include "esp_bt_main.h"
#include "esp_bt_device.h"
#include "esp_gap_ble_api.h"
#endif

#ifdef CONFIG_BT_NIMBLE_ENABLED
#include "nimble/nimble_port.h"
#include "nimble/nimble_port_freertos.h"
#include "host/ble_hs.h"
#include "host/util/util.h"
#include "services/gap/ble_svc_gap.h"
#include "services/gatt/ble_svc_gatt.h"
#include "console/console.h"
#endif

#ifdef CONFIG_BT_BLUEDROID_ENABLED
esp_err_t esp_blufi_host_init(void)
{
    int ret;
    esp_bluedroid_config_t cfg = BT_BLUEDROID_INIT_CONFIG_DEFAULT();
    ret = esp_bluedroid_init_with_cfg(&cfg);
    if (ret) {
        BLUFI_ERROR("%s init bluedroid failed: %s\n", __func__, esp_err_to_name(ret));
        return ESP_FAIL;
    }

    ret = esp_bluedroid_enable();
    if (ret) {
        BLUFI_ERROR("%s init bluedroid failed: %s\n", __func__, esp_err_to_name(ret));
        return ESP_FAIL;
    }
    BLUFI_INFO("BD ADDR: "ESP_BD_ADDR_STR"\n", ESP_BD_ADDR_HEX(esp_bt_dev_get_address()));

    /* Set the default device name */
    ret = esp_ble_gap_set_device_name(BLUFI_DEVICE_NAME);
    if (ret) {
        BLUFI_ERROR("%s set device name failed: %s\n", __func__, esp_err_to_name(ret));
        return ESP_FAIL;
    }

    return ESP_OK;

}

#ifdef CONFIG_EXAMPLE_BLUFI_BLE_SMP_ENABLE

void esp_blufi_set_ble_security_params(void)
{
    /* set the security iocap & auth_req & key size & init key response key parameters to the stack*/
    esp_ble_auth_req_t auth_req = ESP_LE_AUTH_REQ_SC_MITM; // Secure Connections with MITM protection (no bonding)
    esp_ble_io_cap_t iocap = ESP_IO_CAP_OUT;               // IO capability: DisplayOnly
    uint8_t key_size = 16;      //the key size should be 7~16 bytes
    uint8_t init_key = ESP_BLE_ENC_KEY_MASK | ESP_BLE_ID_KEY_MASK;
    uint8_t rsp_key = ESP_BLE_ENC_KEY_MASK | ESP_BLE_ID_KEY_MASK;
    //set static passkey
    uint32_t passkey = 123456;
    uint8_t auth_option = ESP_BLE_ONLY_ACCEPT_SPECIFIED_AUTH_ENABLE;
    uint8_t oob_support = ESP_BLE_OOB_DISABLE;
    BLUFI_INFO("BLE SMP passkey: %06" PRIu32 " (WARNING: Change this default value for production or don't use static passkey!)\n", passkey);
    esp_ble_gap_set_security_param(ESP_BLE_SM_SET_STATIC_PASSKEY, &passkey, sizeof(uint32_t));
    esp_ble_gap_set_security_param(ESP_BLE_SM_AUTHEN_REQ_MODE, &auth_req, sizeof(uint8_t));
    esp_ble_gap_set_security_param(ESP_BLE_SM_IOCAP_MODE, &iocap, sizeof(uint8_t));
    esp_ble_gap_set_security_param(ESP_BLE_SM_MAX_KEY_SIZE, &key_size, sizeof(uint8_t));
    esp_ble_gap_set_security_param(ESP_BLE_SM_ONLY_ACCEPT_SPECIFIED_SEC_AUTH, &auth_option, sizeof(uint8_t));
    esp_ble_gap_set_security_param(ESP_BLE_SM_OOB_SUPPORT, &oob_support, sizeof(uint8_t));
    /* If your BLE device acts as a Slave, the init_key means you hope which types of key of the master should distribute to you,
    and the response key means which key you can distribute to the master;
    If your BLE device acts as a master, the response key means you hope which types of key of the slave should distribute to you,
    and the init key means which key you can distribute to the slave. */
    esp_ble_gap_set_security_param(ESP_BLE_SM_SET_INIT_KEY, &init_key, sizeof(uint8_t));
    esp_ble_gap_set_security_param(ESP_BLE_SM_SET_RSP_KEY, &rsp_key, sizeof(uint8_t));
}

#endif // #if CONFIG_EXAMPLE_BLUFI_BLE_SMP_ENABLE

esp_err_t esp_blufi_host_deinit(void)
{
    int ret;
    ret = esp_blufi_profile_deinit();
    if(ret != ESP_OK) {
        return ret;
    }

    ret = esp_bluedroid_disable();
    if (ret) {
        BLUFI_ERROR("%s deinit bluedroid failed: %s\n", __func__, esp_err_to_name(ret));
        return ESP_FAIL;
    }

    ret = esp_bluedroid_deinit();
    if (ret) {
        BLUFI_ERROR("%s deinit bluedroid failed: %s\n", __func__, esp_err_to_name(ret));
        return ESP_FAIL;
    }

    return ESP_OK;

}

esp_err_t esp_blufi_gap_register_callback(void)
{
   int rc;
   rc = esp_ble_gap_register_callback(esp_blufi_gap_event_handler);
    if(rc){
        return rc;
    }
    return esp_blufi_profile_init();
}

esp_err_t esp_blufi_host_and_cb_init(esp_blufi_callbacks_t *example_callbacks)
{
    esp_err_t ret = ESP_OK;

    ret = esp_blufi_host_init();
    if (ret) {
        BLUFI_ERROR("%s initialise host failed: %s\n", __func__, esp_err_to_name(ret));
        return ret;
    }

    ret = esp_blufi_register_callbacks(example_callbacks);
    if(ret){
        BLUFI_ERROR("%s blufi register failed, error code = %x\n", __func__, ret);
        return ret;
    }

    ret = esp_blufi_gap_register_callback();
    if(ret){
        BLUFI_ERROR("%s gap register failed, error code = %x\n", __func__, ret);
        return ret;
    }

    #ifdef CONFIG_EXAMPLE_BLUFI_BLE_SMP_ENABLE
    esp_blufi_set_ble_security_params();
    #endif // CONFIG_EXAMPLE_BLUFI_BLE_SMP_ENABLE

    return ESP_OK;
}

#endif /* CONFIG_BT_BLUEDROID_ENABLED */

#if CONFIG_BT_CONTROLLER_ENABLED || !CONFIG_BT_NIMBLE_ENABLED
esp_err_t esp_blufi_controller_init() {
    esp_err_t ret = ESP_OK;
#if CONFIG_IDF_TARGET_ESP32
    ESP_ERROR_CHECK(esp_bt_controller_mem_release(ESP_BT_MODE_CLASSIC_BT));
#endif

    esp_bt_controller_config_t bt_cfg = BT_CONTROLLER_INIT_CONFIG_DEFAULT();
    ret = esp_bt_controller_init(&bt_cfg);
    if (ret) {
        BLUFI_ERROR("%s initialize bt controller failed: %s\n", __func__, esp_err_to_name(ret));
        return ret;
    }

    ret = esp_bt_controller_enable(ESP_BT_MODE_BLE);
    if (ret) {
        BLUFI_ERROR("%s enable bt controller failed: %s\n", __func__, esp_err_to_name(ret));
        return ret;
    }
    return ret;
}
#endif

#if CONFIG_BT_CONTROLLER_ENABLED || !CONFIG_BT_NIMBLE_ENABLED
esp_err_t esp_blufi_controller_deinit() {
    esp_err_t ret = ESP_OK;
    ret = esp_bt_controller_disable();
    if (ret) {
        BLUFI_ERROR("%s disable bt controller failed: %s\n", __func__, esp_err_to_name(ret));
        return ret;
    }

    ret = esp_bt_controller_deinit();
    if (ret) {
        BLUFI_ERROR("%s deinit bt controller failed: %s\n", __func__, esp_err_to_name(ret));
        return ret;
    }

    return ret;
}
#endif

#ifdef CONFIG_BT_NIMBLE_ENABLED
void ble_store_config_init(void);
static void blufi_on_reset(int reason)
{
    MODLOG_DFLT(ERROR, "Resetting state; reason=%d\n", reason);
}

static void
blufi_on_sync(void)
{
  esp_blufi_profile_init();
}

void bleprph_host_task(void *param)
{
    ESP_LOGI("BLUFI_EXAMPLE", "BLE Host Task Started");
    /* This function will return only when nimble_port_stop() is executed */
    nimble_port_run();

    nimble_port_freertos_deinit();
}

esp_err_t esp_blufi_host_init(void)
{
    esp_err_t err;
    err = esp_nimble_init();
    if (err) {
        BLUFI_ERROR("%s failed: %s\n", __func__, esp_err_to_name(err));
        return ESP_FAIL;
    }

/* Initialize the NimBLE host configuration. */
    ble_hs_cfg.reset_cb = blufi_on_reset;
    ble_hs_cfg.sync_cb = blufi_on_sync;
    ble_hs_cfg.gatts_register_cb = esp_blufi_gatt_svr_register_cb;
    ble_hs_cfg.store_status_cb = ble_store_util_status_rr;

    /* BLUFI uses its own application-layer security (DH + AES), not BLE Security
     * Manager.  sm_mitm/sm_sc/sm_bonding are opt-in via Kconfig; Just Works
     * pairing is acceptable because the DH key exchange provides the security. */
    ble_hs_cfg.sm_io_cap = 4;
#ifdef CONFIG_EXAMPLE_BONDING
    ble_hs_cfg.sm_bonding = 1;
#endif
#ifdef CONFIG_EXAMPLE_MITM
    ble_hs_cfg.sm_mitm = 1;
#endif
#ifdef CONFIG_EXAMPLE_USE_SC
    ble_hs_cfg.sm_sc = 1;
#else
    ble_hs_cfg.sm_sc = 0;
#ifdef CONFIG_EXAMPLE_BONDING
    ble_hs_cfg.sm_our_key_dist = 1;
    ble_hs_cfg.sm_their_key_dist = 1;
#endif
#endif

    int rc;
    rc = esp_blufi_gatt_svr_init();
    assert(rc == 0);

#if CONFIG_BT_NIMBLE_GAP_SERVICE
    /* Set the default device name. */
    rc = ble_svc_gap_device_name_set(BLUFI_DEVICE_NAME);
    assert(rc == 0);
#endif

    /* XXX Need to have template for store */
    ble_store_config_init();

    esp_blufi_btc_init();

    err = esp_nimble_enable(bleprph_host_task);
    if (err) {
        BLUFI_ERROR("%s failed: %s\n", __func__, esp_err_to_name(err));
        return ESP_FAIL;
    }

    return ESP_OK;
}

esp_err_t esp_blufi_host_deinit(void)
{
    esp_err_t ret = ESP_OK;

    ret = nimble_port_stop();
    if (ret != ESP_OK) {
        return ret;
    }

    esp_blufi_gatt_svr_deinit();

    if (ret == 0) {
        esp_nimble_deinit();
    }

    ret = esp_blufi_profile_deinit();
    if (ret != ESP_OK) {
        return ret;
    }

    esp_blufi_btc_deinit();

    return ret;
}

esp_err_t esp_blufi_gap_register_callback(void)
{
    return ESP_OK;
}

esp_err_t esp_blufi_host_and_cb_init(esp_blufi_callbacks_t *example_callbacks)
{
    esp_err_t ret = ESP_OK;

    ret = esp_blufi_register_callbacks(example_callbacks);
    if(ret){
        BLUFI_ERROR("%s blufi register failed, error code = %x\n", __func__, ret);
        return ret;
    }

    ret = esp_blufi_gap_register_callback();
    if(ret){
        BLUFI_ERROR("%s gap register failed, error code = %x\n", __func__, ret);
        return ret;
    }

    ret = esp_blufi_host_init();
    if (ret) {
        BLUFI_ERROR("%s initialise host failed: %s\n", __func__, esp_err_to_name(ret));
        return ret;
    }

    return ret;
}


#endif /* CONFIG_BT_NIMBLE_ENABLED */