esp-idf/components/bt/bluedroid/btc/profile/std/gatt/btc_gattc.c

// Copyright 2015-2016 Espressif Systems (Shanghai) PTE LTD
//
// 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.

#include <string.h>

#include "btm_ble_api.h"
#include "btc_gattc.h"
#include "btc_gatt_util.h"
#include "btc_manage.h"
#include "bta_gatt_api.h"
#include "bt_trace.h"
#include "esp_gattc_api.h"

#if (GATTC_INCLUDED == TRUE)
static inline void btc_gattc_cb_to_app(esp_gattc_cb_event_t event, esp_gatt_if_t gattc_if, esp_ble_gattc_cb_param_t *param)
{
    esp_gattc_cb_t btc_gattc_cb = (esp_gattc_cb_t )btc_profile_cb_get(BTC_PID_GATTC);
    if (btc_gattc_cb) {
	btc_gattc_cb(event, gattc_if, param);
    }									
}

void btc_gattc_arg_deep_copy(btc_msg_t *msg, void *p_dest, void *p_src)
{
    btc_ble_gattc_args_t *dst = (btc_ble_gattc_args_t *) p_dest;
    btc_ble_gattc_args_t *src = (btc_ble_gattc_args_t *)p_src;

    switch (msg->act) {
    case BTC_GATTC_ACT_WRITE_CHAR: {
        dst->write_char.value = (uint8_t *)GKI_getbuf(src->write_char.value_len);
        if (dst->write_char.value) {
            memcpy(dst->write_char.value, src->write_char.value, src->write_char.value_len);
        } else {
            LOG_ERROR("%s %d no mem\n", __func__, msg->act);
        }
        break;
    }
    case BTC_GATTC_ACT_WRITE_CHAR_DESCR: {
        dst->write_descr.value = (uint8_t *)GKI_getbuf(src->write_descr.value_len);
        if (dst->write_descr.value) {
            memcpy(dst->write_descr.value, src->write_descr.value, src->write_descr.value_len);
        } else {
            LOG_ERROR("%s %d no mem\n", __func__, msg->act);
        }
        break;
    }
    case BTC_GATTC_ACT_PREPARE_WRITE: {
        dst->prep_write.value = (uint8_t *)GKI_getbuf(src->prep_write.value_len);
        if (dst->prep_write.value) {
            memcpy(dst->prep_write.value, src->prep_write.value, src->prep_write.value_len);
        } else {
            LOG_ERROR("%s %d no mem\n", __func__, msg->act);
        }
        break;
    }
    case BTC_GATTC_ACT_PREPARE_WRITE_CHAR_DESCR: {
        dst->prep_write_descr.value = (uint8_t *)GKI_getbuf(src->prep_write_descr.value_len);
        if (dst->prep_write_descr.value) {
            memcpy(dst->prep_write_descr.value, src->prep_write_descr.value, src->prep_write_descr.value_len);
        } else {
            LOG_ERROR("%s %d no mem\n", __func__, msg->act);
        }
        break;
    }
    default:
        LOG_DEBUG("%s Unhandled deep copy %d\n", __func__, msg->act);
        break;
    }
}

void btc_gattc_arg_deep_free(btc_msg_t *msg)
{
    btc_ble_gattc_args_t *arg = (btc_ble_gattc_args_t *)msg->arg;

    switch (msg->act) {
    case BTC_GATTC_ACT_WRITE_CHAR: {
        if (arg->write_char.value) {
            GKI_freebuf(arg->write_char.value);
        }
        break;
    }
    case BTC_GATTC_ACT_WRITE_CHAR_DESCR: {
        if (arg->write_descr.value) {
            GKI_freebuf(arg->write_descr.value);
        }
        break;
    }
    case BTC_GATTC_ACT_PREPARE_WRITE: {
        if (arg->prep_write.value) {
            GKI_freebuf(arg->prep_write.value);
        }
        break;
    }
    case BTC_GATTC_ACT_PREPARE_WRITE_CHAR_DESCR: {
        if (arg->prep_write_descr.value) {
            GKI_freebuf(arg->prep_write_descr.value);
        }
        break;
    }
    default:
        LOG_DEBUG("%s Unhandled deep free %d\n", __func__, msg->act);
        break;
    }

}

// TODO: to be finished, used in deep-copying data from lower layer
static void btc_gattc_copy_req_data(btc_msg_t *msg, void *p_dest, void *p_src)
{
    tBTA_GATTC *p_dest_data = (tBTA_GATTC *) p_dest;
    tBTA_GATTC *p_src_data = (tBTA_GATTC *) p_src;

    if (!p_src_data || !p_dest_data) {
        return;
    }

    // Allocate buffer for request data if necessary
    switch (msg->act) {
    default:
        break;
    }
}

// TODO: to be finished, used to free deep-copied data allocated using btc_gattc_copy_req_data()
static void btc_gattc_free_req_data(btc_msg_t *msg)
{
    return;
}

static void btc_gattc_cback(tBTA_GATTC_EVT event, tBTA_GATTC *p_data)
{
    bt_status_t ret;
    btc_msg_t msg;

    msg.sig = BTC_SIG_API_CB;
    msg.pid = BTC_PID_GATTC;
    msg.act = (uint8_t) event;
    ret = btc_transfer_context(&msg, p_data, sizeof(tBTA_GATTC), btc_gattc_copy_req_data);

    if (ret) {
        LOG_ERROR("%s transfer failed\n", __func__);
    }
}

static void btc_gattc_app_register(btc_ble_gattc_args_t *arg)
{
    tBT_UUID app_uuid;
    app_uuid.len = 2;
    app_uuid.uu.uuid16 = arg->app_reg.app_id;
    BTA_GATTC_AppRegister(&app_uuid, btc_gattc_cback);
}

static void btc_gattc_app_unregister(btc_ble_gattc_args_t *arg)
{
    BTA_GATTC_AppDeregister(arg->app_unreg.gattc_if);
}

static void btc_gattc_open(btc_ble_gattc_args_t *arg)
{
    tBTA_GATT_TRANSPORT transport = BTA_GATT_TRANSPORT_LE;
    BTA_GATTC_Open(arg->open.gattc_if, arg->open.remote_bda, arg->open.is_direct, transport);
}

static void btc_gattc_close(btc_ble_gattc_args_t *arg)
{
    // TODO; Review this call of BTA_API, check the usage of BTA_GATTC_CancelOpen
    BTA_GATTC_Close(arg->close.conn_id);
}

static void btc_gattc_cfg_mtu(btc_ble_gattc_args_t *arg)
{
    BTA_GATTC_ConfigureMTU (arg->cfg_mtu.conn_id, arg->cfg_mtu.mtu);
}

static void btc_gattc_search_service(btc_ble_gattc_args_t *arg)
{
    tBT_UUID srvc_uuid;

    if (arg->search_srvc.filter_uuid_enable) {
        btc_to_bta_uuid(&srvc_uuid, &arg->search_srvc.filter_uuid);
        BTA_GATTC_ServiceSearchRequest(arg->search_srvc.conn_id, &srvc_uuid);
    } else {
        BTA_GATTC_ServiceSearchRequest(arg->search_srvc.conn_id, NULL);
    }
}

static void btc_gattc_get_first_char(btc_ble_gattc_args_t *arg)
{
    esp_gatt_id_t char_id;
    tBTA_GATT_STATUS status;
    tBTA_GATTC_CHAR_ID out_char_id;
    tBTA_GATT_CHAR_PROP out_char_prop;
    tBTA_GATT_SRVC_ID srvc_id;
    esp_ble_gattc_cb_param_t param;
    esp_gatt_if_t gattc_if;

    btc_to_bta_srvc_id(&srvc_id, &arg->get_first_char.service_id);
    status = BTA_GATTC_GetFirstChar(arg->get_first_char.conn_id, &srvc_id, NULL,
                                    &out_char_id, &out_char_prop);
    if (status == 0) {
        bta_to_btc_gatt_id(&char_id, &out_char_id.char_id);
    }

    gattc_if = BTC_GATT_GET_GATT_IF(arg->get_first_char.conn_id);
    memset(&param, 0, sizeof(esp_ble_gattc_cb_param_t));
    param.get_char.conn_id = BTC_GATT_GET_CONN_ID(arg->get_first_char.conn_id);
    param.get_char.status = status;
    memcpy(&param.get_char.srvc_id, &arg->get_first_char.service_id, sizeof(esp_gatt_srvc_id_t));
    memcpy(&param.get_char.char_id, &char_id, sizeof(esp_gatt_id_t));
    param.get_char.char_prop = out_char_prop;
    btc_gattc_cb_to_app(ESP_GATTC_GET_CHAR_EVT, gattc_if, &param);
}

static void btc_gattc_get_next_char(btc_ble_gattc_args_t *arg)
{
    esp_gatt_id_t char_id;
    tBTA_GATT_STATUS status;
    tBTA_GATTC_CHAR_ID in_char_id;
    tBTA_GATTC_CHAR_ID out_char_id;
    tBTA_GATT_CHAR_PROP out_char_prop;
    esp_ble_gattc_cb_param_t param;
    esp_gatt_if_t gattc_if;

    btc_to_bta_srvc_id(&in_char_id.srvc_id, &arg->get_next_char.service_id);
    btc_to_bta_gatt_id(&in_char_id.char_id, &arg->get_next_char.char_id);

    status = BTA_GATTC_GetNextChar(arg->get_next_char.conn_id, &in_char_id, NULL,
                                   &out_char_id, &out_char_prop);

    if (status == 0) {
        bta_to_btc_gatt_id(&char_id, &out_char_id.char_id);
    }

    gattc_if = BTC_GATT_GET_GATT_IF(arg->get_next_char.conn_id);
    memset(&param, 0, sizeof(esp_ble_gattc_cb_param_t));
    param.get_char.conn_id = BTC_GATT_GET_CONN_ID(arg->get_next_char.conn_id);
    param.get_char.status = status;
    memcpy(&param.get_char.srvc_id, &arg->get_next_char.service_id, sizeof(esp_gatt_srvc_id_t));
    memcpy(&param.get_char.char_id, &char_id, sizeof(esp_gatt_id_t));
    param.get_char.char_prop = out_char_prop;
    btc_gattc_cb_to_app(ESP_GATTC_GET_CHAR_EVT, gattc_if, &param);
}

static void btc_gattc_get_first_descr(btc_ble_gattc_args_t *arg)
{
    esp_gatt_id_t descr_id;
    tBTA_GATT_STATUS status;
    tBTA_GATTC_CHAR_ID in_char_id;
    tBTA_GATTC_CHAR_DESCR_ID out_char_descr_id;
    esp_ble_gattc_cb_param_t param;
    esp_gatt_if_t gattc_if;

    btc_to_bta_srvc_id(&in_char_id.srvc_id, &arg->get_first_descr.service_id);
    btc_to_bta_gatt_id(&in_char_id.char_id, &arg->get_first_descr.char_id);

    status = BTA_GATTC_GetFirstCharDescr(arg->get_first_descr.conn_id, &in_char_id, NULL,
                                         &out_char_descr_id);

    if (status == 0) {
        bta_to_btc_gatt_id(&descr_id, &out_char_descr_id.descr_id);
    }

    gattc_if = BTC_GATT_GET_GATT_IF(arg->get_first_descr.conn_id);
    memset(&param, 0, sizeof(esp_ble_gattc_cb_param_t));
    param.get_descr.conn_id = BTC_GATT_GET_CONN_ID(arg->get_first_descr.conn_id);
    param.get_descr.status = status;
    memcpy(&param.get_descr.srvc_id, &arg->get_first_descr.service_id, sizeof(esp_gatt_srvc_id_t));
    memcpy(&param.get_descr.char_id, &arg->get_first_descr.char_id, sizeof(esp_gatt_id_t));
    memcpy(&param.get_descr.descr_id, &descr_id, sizeof(esp_gatt_id_t));
    btc_gattc_cb_to_app(ESP_GATTC_GET_DESCR_EVT, gattc_if, &param);
}

static void btc_gattc_get_next_descr(btc_ble_gattc_args_t *arg)
{
    esp_gatt_id_t descr_id;
    tBTA_GATT_STATUS status;
    tBTA_GATTC_CHAR_DESCR_ID in_char_descr_id;
    tBTA_GATTC_CHAR_DESCR_ID out_char_descr_id;
    esp_ble_gattc_cb_param_t param;
    esp_gatt_if_t gattc_if;

    btc_to_bta_srvc_id(&in_char_descr_id.char_id.srvc_id, &arg->get_next_descr.service_id);
    btc_to_bta_gatt_id(&in_char_descr_id.char_id.char_id, &arg->get_next_descr.char_id);
    btc_to_bta_gatt_id(&in_char_descr_id.descr_id, &arg->get_next_descr.descr_id);

    status = BTA_GATTC_GetNextCharDescr(arg->get_next_descr.conn_id, &in_char_descr_id
                                        , NULL, &out_char_descr_id);
    if (status == 0) {
        bta_to_btc_gatt_id(&descr_id, &out_char_descr_id.descr_id);
    }

    gattc_if = BTC_GATT_GET_GATT_IF(arg->get_next_descr.conn_id);
    memset(&param, 0, sizeof(esp_ble_gattc_cb_param_t));
    param.get_descr.conn_id = BTC_GATT_GET_CONN_ID(arg->get_next_descr.conn_id);
    param.get_descr.status = status;
    memcpy(&param.get_descr.srvc_id, &arg->get_next_descr.service_id, sizeof(esp_gatt_srvc_id_t));
    memcpy(&param.get_descr.char_id, &arg->get_next_descr.char_id, sizeof(esp_gatt_id_t));
    memcpy(&param.get_descr.descr_id, &descr_id, sizeof(esp_gatt_id_t));
    btc_gattc_cb_to_app(ESP_GATTC_GET_DESCR_EVT, gattc_if, &param);
}

static void btc_gattc_get_first_incl_service(btc_ble_gattc_args_t *arg)
{
    esp_gatt_srvc_id_t incl_srvc_id;
    tBTA_GATT_STATUS status;
    tBTA_GATT_SRVC_ID srvc_id;
    tBTA_GATTC_INCL_SVC_ID out_incl_svc_id;
    esp_ble_gattc_cb_param_t param;
    esp_gatt_if_t gattc_if;

    btc_to_bta_srvc_id(&srvc_id, &arg->get_first_incl_srvc.service_id);

    status = BTA_GATTC_GetFirstIncludedService(arg->get_first_incl_srvc.conn_id, &srvc_id,
             NULL, &out_incl_svc_id);

    bta_to_btc_srvc_id(&incl_srvc_id, &out_incl_svc_id.incl_svc_id);

    gattc_if = BTC_GATT_GET_GATT_IF(arg->get_first_incl_srvc.conn_id);
    memset(&param, 0, sizeof(esp_ble_gattc_cb_param_t));
    param.get_incl_srvc.conn_id = BTC_GATT_GET_CONN_ID(arg->get_first_incl_srvc.conn_id);
    param.get_incl_srvc.status = status;
    memcpy(&param.get_incl_srvc.srvc_id, &arg->get_first_incl_srvc.service_id, sizeof(esp_gatt_srvc_id_t));
    memcpy(&param.get_incl_srvc.incl_srvc_id, &incl_srvc_id, sizeof(esp_gatt_srvc_id_t));
    btc_gattc_cb_to_app(ESP_GATTC_GET_INCL_SRVC_EVT, gattc_if, &param);
}

static void btc_gattc_get_next_incl_service(btc_ble_gattc_args_t *arg)
{
    esp_gatt_srvc_id_t incl_srvc_id;
    tBTA_GATT_STATUS status;
    tBTA_GATTC_INCL_SVC_ID in_incl_svc_id;
    tBTA_GATTC_INCL_SVC_ID out_incl_svc_id;
    esp_ble_gattc_cb_param_t param;
    esp_gatt_if_t gattc_if;

    btc_to_bta_srvc_id(&in_incl_svc_id.srvc_id, &arg->get_next_incl_srvc.service_id);
    btc_to_bta_srvc_id(&in_incl_svc_id.incl_svc_id, &arg->get_next_incl_srvc.start_service_id);

    status = BTA_GATTC_GetNextIncludedService(arg->get_next_incl_srvc.conn_id, &in_incl_svc_id,
             NULL, &out_incl_svc_id);

    bta_to_btc_srvc_id(&incl_srvc_id, &out_incl_svc_id.incl_svc_id);

    gattc_if = BTC_GATT_GET_GATT_IF(arg->get_next_incl_srvc.conn_id);
    memset(&param, 0, sizeof(esp_ble_gattc_cb_param_t));
    param.get_incl_srvc.conn_id = BTC_GATT_GET_CONN_ID(arg->get_next_incl_srvc.conn_id);
    param.get_incl_srvc.status = status;
    memcpy(&param.get_incl_srvc.srvc_id, &arg->get_next_incl_srvc.service_id, sizeof(esp_gatt_srvc_id_t));
    memcpy(&param.get_incl_srvc.incl_srvc_id, &incl_srvc_id, sizeof(esp_gatt_srvc_id_t));
    btc_gattc_cb_to_app(ESP_GATTC_GET_INCL_SRVC_EVT, gattc_if, &param);
}

static void btc_gattc_read_char(btc_ble_gattc_args_t *arg)
{
    tBTA_GATTC_CHAR_ID in_char_id;
    btc_to_bta_srvc_id(&in_char_id.srvc_id, &arg->read_char.service_id);
    btc_to_bta_gatt_id(&in_char_id.char_id, &arg->read_char.char_id);
    BTA_GATTC_ReadCharacteristic(arg->read_char.conn_id, &in_char_id, arg->read_char.auth_req);
}

static void btc_gattc_read_char_descr(btc_ble_gattc_args_t *arg)
{
    tBTA_GATTC_CHAR_DESCR_ID in_char_descr_id;
    btc_to_bta_srvc_id(&in_char_descr_id.char_id.srvc_id, &arg->read_descr.service_id);
    btc_to_bta_gatt_id(&in_char_descr_id.char_id.char_id, &arg->read_descr.char_id);
    btc_to_bta_gatt_id(&in_char_descr_id.descr_id, &arg->read_descr.descr_id);

    BTA_GATTC_ReadCharDescr(arg->read_descr.conn_id, &in_char_descr_id, arg->read_descr.auth_req);
}

static void btc_gattc_write_char(btc_ble_gattc_args_t *arg)
{
    tBTA_GATTC_CHAR_ID in_char_id;

    btc_to_bta_srvc_id(&in_char_id.srvc_id, &arg->write_char.service_id);
    btc_to_bta_gatt_id(&in_char_id.char_id, &arg->write_char.char_id);

    BTA_GATTC_WriteCharValue(arg->write_char.conn_id, &in_char_id,
                             arg->write_char.write_type,
                             arg->write_char.value_len,
                             arg->write_char.value,
                             arg->write_char.auth_req);
}

static void btc_gattc_write_char_descr(btc_ble_gattc_args_t *arg)
{
    tBTA_GATTC_CHAR_DESCR_ID in_char_descr_id;
    tBTA_GATT_UNFMT descr_val;
    btc_to_bta_srvc_id(&in_char_descr_id.char_id.srvc_id, &arg->write_descr.service_id);
    btc_to_bta_gatt_id(&in_char_descr_id.char_id.char_id, &arg->write_descr.char_id);
    btc_to_bta_gatt_id(&in_char_descr_id.descr_id, &arg->write_descr.descr_id);

    descr_val.len = arg->write_descr.value_len;
    descr_val.p_value = arg->write_descr.value;

    BTA_GATTC_WriteCharDescr(arg->write_descr.conn_id, &in_char_descr_id,
                             arg->write_descr.write_type, &descr_val,
                             arg->write_descr.auth_req);
}

static void btc_gattc_prepare_write(btc_ble_gattc_args_t *arg)
{
    tBTA_GATTC_CHAR_ID in_char_id;
    btc_to_bta_srvc_id(&in_char_id.srvc_id, &arg->prep_write.service_id);
    btc_to_bta_gatt_id(&in_char_id.char_id, &arg->prep_write.char_id);

    BTA_GATTC_PrepareWrite(arg->prep_write.conn_id,
                           &in_char_id,
                           arg->prep_write.offset,
                           arg->prep_write.value_len,
                           arg->prep_write.value,
                           arg->prep_write.auth_req);
}
static void btc_gattc_prepare_write_char_descr(btc_ble_gattc_args_t *arg)
{
    tBTA_GATTC_CHAR_DESCR_ID in_char_descr_id;
    tBTA_GATT_UNFMT descr_val;
    btc_to_bta_srvc_id(&in_char_descr_id.char_id.srvc_id, &arg->prep_write_descr.service_id);
    btc_to_bta_gatt_id(&in_char_descr_id.char_id.char_id, &arg->prep_write_descr.char_id);
    btc_to_bta_gatt_id(&in_char_descr_id.descr_id, &arg->prep_write_descr.descr_id);

    descr_val.len = arg->prep_write_descr.value_len;
    descr_val.p_value = arg->prep_write_descr.value;
    BTA_GATTC_PrepareWriteCharDescr(arg->prep_write_descr.conn_id,
                                    &in_char_descr_id,
                                    arg->prep_write_descr.offset,
                                    &descr_val,
                                    arg->prep_write_descr.auth_req);
}

static void btc_gattc_execute_wrtie(btc_ble_gattc_args_t *arg)
{
    BTA_GATTC_ExecuteWrite(arg->exec_write.conn_id, arg->exec_write.is_execute);
}

static void btc_gattc_reg_for_notify(btc_ble_gattc_args_t *arg)
{
    tBTA_GATT_STATUS status;
    tBTA_GATTC_CHAR_ID in_char_id;
    esp_ble_gattc_cb_param_t param;

    btc_to_bta_srvc_id(&in_char_id.srvc_id, &arg->reg_for_notify.service_id);
    btc_to_bta_gatt_id(&in_char_id.char_id, &arg->reg_for_notify.char_id);

    status = BTA_GATTC_RegisterForNotifications(arg->reg_for_notify.gattc_if,
             arg->reg_for_notify.remote_bda,
             &in_char_id);

    memset(&param, 0, sizeof(esp_ble_gattc_cb_param_t));
    param.reg_for_notify.status = status;
    memcpy(&param.reg_for_notify.srvc_id, &arg->reg_for_notify.service_id, sizeof(esp_gatt_srvc_id_t));
    memcpy(&param.reg_for_notify.char_id, &arg->reg_for_notify.char_id, sizeof(esp_gatt_id_t));
    btc_gattc_cb_to_app(ESP_GATTC_REG_FOR_NOTIFY_EVT, arg->reg_for_notify.gattc_if, &param);
}

static void btc_gattc_unreg_for_notify(btc_ble_gattc_args_t *arg)
{
    tBTA_GATT_STATUS status;
    tBTA_GATTC_CHAR_ID in_char_id;
    esp_ble_gattc_cb_param_t param;

    btc_to_bta_srvc_id(&in_char_id.srvc_id, &arg->unreg_for_notify.service_id);
    btc_to_bta_gatt_id(&in_char_id.char_id, &arg->unreg_for_notify.char_id);

    status = BTA_GATTC_DeregisterForNotifications(arg->unreg_for_notify.gattc_if,
             arg->unreg_for_notify.remote_bda,
             &in_char_id);

    memset(&param, 0, sizeof(esp_ble_gattc_cb_param_t));
    param.unreg_for_notify.status = status;
    memcpy(&param.unreg_for_notify.srvc_id, &arg->unreg_for_notify.service_id, sizeof(esp_gatt_srvc_id_t));
    memcpy(&param.unreg_for_notify.char_id, &arg->unreg_for_notify.char_id, sizeof(esp_gatt_id_t));
    btc_gattc_cb_to_app(ESP_GATTC_UNREG_FOR_NOTIFY_EVT, arg->unreg_for_notify.gattc_if, &param);
}

void btc_gattc_call_handler(btc_msg_t *msg)
{
    btc_ble_gattc_args_t *arg = (btc_ble_gattc_args_t *)(msg->arg);
    switch (msg->act) {
    case BTC_GATTC_ACT_APP_REGISTER:
        btc_gattc_app_register(arg);
        break;
    case BTC_GATTC_ACT_APP_UNREGISTER:
        btc_gattc_app_unregister(arg);
        break;
    case BTC_GATTC_ACT_OPEN:
        btc_gattc_open(arg);
        break;
    case BTC_GATTC_ACT_CLOSE:
        btc_gattc_close(arg);
        break;
    case BTC_GATTC_ACT_CFG_MTU:
        btc_gattc_cfg_mtu(arg);
        break;
    case BTC_GATTC_ACT_SEARCH_SERVICE:
        btc_gattc_search_service(arg);
        break;
    case BTC_GATTC_ACT_GET_FIRST_CHAR:
        btc_gattc_get_first_char(arg);
        break;
    case BTC_GATTC_ACT_GET_NEXT_CHAR:
        btc_gattc_get_next_char(arg);
        break;
    case BTC_GATTC_ACT_GET_FIRST_DESCR:
        btc_gattc_get_first_descr(arg);
        break;
    case BTC_GATTC_ACT_GET_NEXT_DESCR:
        btc_gattc_get_next_descr(arg);
        break;
    case BTC_GATTC_ACT_GET_FIRST_INCL_SERVICE:
        btc_gattc_get_first_incl_service(arg);
        break;
    case BTC_GATTC_ACT_GET_NEXT_INCL_SERVICE:
        btc_gattc_get_next_incl_service(arg);
        break;
    case BTC_GATTC_ACT_READ_CHAR:
        btc_gattc_read_char(arg);
        break;
    case BTC_GATTC_ACT_READ_CHAR_DESCR:
        btc_gattc_read_char_descr(arg);
        break;
    case BTC_GATTC_ACT_WRITE_CHAR:
        btc_gattc_write_char(arg);
        break;
    case BTC_GATTC_ACT_WRITE_CHAR_DESCR:
        btc_gattc_write_char_descr(arg);
        break;
    case BTC_GATTC_ACT_PREPARE_WRITE:
        btc_gattc_prepare_write(arg);
        break;
    case BTC_GATTC_ACT_PREPARE_WRITE_CHAR_DESCR:
        btc_gattc_prepare_write_char_descr(arg);
        break;
    case BTC_GATTC_ACT_EXECUTE_WRITE:
        btc_gattc_execute_wrtie(arg);
        break;
    case BTC_GATTC_ACT_REG_FOR_NOTIFY:
        btc_gattc_reg_for_notify(arg);
        break;
    case BTC_GATTC_ACT_UNREG_FOR_NOTIFY:
        btc_gattc_unreg_for_notify(arg);
        break;
    default:
        LOG_ERROR("%s: Unhandled event (%d)!\n", __FUNCTION__, msg->act);
        break;
    }

    btc_gattc_arg_deep_free(msg);
}

void btc_gattc_cb_handler(btc_msg_t *msg)
{
    tBTA_GATTC *arg = (tBTA_GATTC *)(msg->arg);
    esp_gatt_if_t gattc_if;
    esp_ble_gattc_cb_param_t param;

    memset(&param, 0, sizeof(esp_ble_gattc_cb_param_t));

    switch (msg->act) {
    case BTA_GATTC_REG_EVT: {
        tBTA_GATTC_REG *reg_oper = &arg->reg_oper;

        gattc_if = reg_oper->client_if;
        param.reg.status = reg_oper->status;
        param.reg.app_id = reg_oper->app_uuid.uu.uuid16;
        btc_gattc_cb_to_app(ESP_GATTC_REG_EVT, gattc_if, &param);
        break;
    }
    case BTA_GATTC_DEREG_EVT: {
        tBTA_GATTC_REG *reg_oper = &arg->reg_oper;

        gattc_if = reg_oper->client_if;
        btc_gattc_cb_to_app(ESP_GATTC_UNREG_EVT, gattc_if, NULL);
        break;
    }
    case BTA_GATTC_READ_CHAR_EVT: {
        set_read_value(&gattc_if, &param, &arg->read);
        btc_gattc_cb_to_app(ESP_GATTC_READ_CHAR_EVT, gattc_if, &param);
        break;
    }
    case BTA_GATTC_WRITE_CHAR_EVT:
    case BTA_GATTC_PREP_WRITE_EVT: {
        tBTA_GATTC_WRITE *write = &arg->write;
        uint32_t ret_evt = (msg->act == BTA_GATTC_WRITE_CHAR_EVT) ?
                           ESP_GATTC_WRITE_CHAR_EVT : ESP_GATTC_PREP_WRITE_EVT;

        gattc_if = BTC_GATT_GET_GATT_IF(write->conn_id);
        param.write.conn_id = BTC_GATT_GET_CONN_ID(write->conn_id);
        param.write.status = write->status;
        bta_to_btc_srvc_id(&param.write.srvc_id, &write->srvc_id);
        bta_to_btc_gatt_id(&param.write.char_id, &write->char_id);
        btc_gattc_cb_to_app(ret_evt, gattc_if, &param);
        break;
    }

    case BTA_GATTC_EXEC_EVT: {
        tBTA_GATTC_EXEC_CMPL *exec_cmpl = &arg->exec_cmpl;

        gattc_if = BTC_GATT_GET_GATT_IF(exec_cmpl->conn_id);
        param.exec_cmpl.conn_id = BTC_GATT_GET_CONN_ID(exec_cmpl->conn_id);
        param.exec_cmpl.status = exec_cmpl->status;
        btc_gattc_cb_to_app(ESP_GATTC_EXEC_EVT, gattc_if, &param);
        break;
    }

    case BTA_GATTC_SEARCH_CMPL_EVT: {
        tBTA_GATTC_SEARCH_CMPL *search_cmpl = &arg->search_cmpl;

        gattc_if = BTC_GATT_GET_GATT_IF(search_cmpl->conn_id);
        param.search_cmpl.conn_id = BTC_GATT_GET_CONN_ID(search_cmpl->conn_id);
        param.search_cmpl.status = search_cmpl->status;
        btc_gattc_cb_to_app(ESP_GATTC_SEARCH_CMPL_EVT, gattc_if, &param);
        break;
    }
    case BTA_GATTC_SEARCH_RES_EVT: {
        tBTA_GATTC_SRVC_RES *srvc_res = &arg->srvc_res;

        gattc_if = BTC_GATT_GET_GATT_IF(srvc_res->conn_id);
        param.search_res.conn_id = BTC_GATT_GET_CONN_ID(srvc_res->conn_id);
        bta_to_btc_srvc_id(&param.search_res.srvc_id, &srvc_res->service_uuid);
        btc_gattc_cb_to_app(ESP_GATTC_SEARCH_RES_EVT, gattc_if, &param);
        break;
    }
    case BTA_GATTC_READ_DESCR_EVT: {
        set_read_value(&gattc_if, &param, &arg->read);
        btc_gattc_cb_to_app(ESP_GATTC_READ_DESCR_EVT, gattc_if, &param);
        break;
    }
    case BTA_GATTC_WRITE_DESCR_EVT: {
        tBTA_GATTC_WRITE *write = &arg->write;

        gattc_if = BTC_GATT_GET_GATT_IF(write->conn_id);
        param.write.conn_id = BTC_GATT_GET_CONN_ID(write->conn_id);
        param.write.status = write->status;
        bta_to_btc_srvc_id(&param.write.srvc_id, &write->srvc_id);
        bta_to_btc_gatt_id(&param.write.char_id, &write->char_id);
        bta_to_btc_gatt_id(&param.write.descr_id, &write->descr_type);
        btc_gattc_cb_to_app(ESP_GATTC_WRITE_DESCR_EVT, gattc_if, &param);
        break;
    }
    case BTA_GATTC_NOTIF_EVT: {
        tBTA_GATTC_NOTIFY *notify = &arg->notify;

        gattc_if = BTC_GATT_GET_GATT_IF(notify->conn_id);
        param.notify.conn_id = BTC_GATT_GET_CONN_ID(notify->conn_id);
        memcpy(param.notify.remote_bda, notify->bda, sizeof(esp_bd_addr_t));
        bta_to_btc_srvc_id(&param.notify.srvc_id, &notify->char_id.srvc_id);
        bta_to_btc_gatt_id(&param.notify.char_id, &notify->char_id.char_id);
        bta_to_btc_gatt_id(&param.notify.descr_id, &notify->descr_type);
        param.notify.is_notify = (notify->is_notify == TRUE) ? true : false;
        param.notify.value_len = (notify->len > ESP_GATT_MAX_ATTR_LEN) ? \
                                 ESP_GATT_MAX_ATTR_LEN : notify->len;
        param.notify.value = notify->value;

        if (notify->is_notify == FALSE) {
            BTA_GATTC_SendIndConfirm(notify->conn_id, &notify->char_id);
        }

        btc_gattc_cb_to_app(ESP_GATTC_NOTIFY_EVT, gattc_if, &param);
        break;
    }
    case BTA_GATTC_OPEN_EVT: {
        tBTA_GATTC_OPEN *open = &arg->open;

        gattc_if = open->client_if;
        param.open.status = open->status;
        param.open.conn_id = BTC_GATT_GET_CONN_ID(open->conn_id);
        memcpy(param.open.remote_bda, open->remote_bda, sizeof(esp_bd_addr_t));
        param.open.mtu = open->mtu;
        btc_gattc_cb_to_app(ESP_GATTC_OPEN_EVT, gattc_if, &param);
        break;
    }
    case BTA_GATTC_CLOSE_EVT: {
        tBTA_GATTC_CLOSE *close = &arg->close;

        gattc_if = close->client_if;
        param.close.status = close->status;
        param.close.conn_id = BTC_GATT_GET_CONN_ID(close->conn_id);
        memcpy(param.close.remote_bda, close->remote_bda, sizeof(esp_bd_addr_t));
        param.close.reason = close->reason;
        btc_gattc_cb_to_app(ESP_GATTC_CLOSE_EVT, gattc_if, &param);
        break;
    }

    case BTA_GATTC_CFG_MTU_EVT: {
        tBTA_GATTC_CFG_MTU *cfg_mtu = &arg->cfg_mtu;

        gattc_if = BTC_GATT_GET_GATT_IF(cfg_mtu->conn_id);
        param.cfg_mtu.conn_id = BTC_GATT_GET_CONN_ID(cfg_mtu->conn_id);
        param.cfg_mtu.status = cfg_mtu->status;
        param.cfg_mtu.mtu = cfg_mtu->mtu;
        btc_gattc_cb_to_app(ESP_GATTC_CFG_MTU_EVT, gattc_if, &param);
        break;
    }

    case BTA_GATTC_ACL_EVT: {
        /* Currently, this event will never happen */
        break;
    }
    case BTA_GATTC_CANCEL_OPEN_EVT: {
        /* Currently, this event will never happen */
        break;
    }
    case BTA_GATTC_CONGEST_EVT: {
        tBTA_GATTC_CONGEST *congest = &arg->congest;

        gattc_if = BTC_GATT_GET_GATT_IF(congest->conn_id);
        param.congest.conn_id = BTC_GATT_GET_CONN_ID(congest->conn_id);
        param.congest.congested = (congest->congested == TRUE) ? true : false;
        btc_gattc_cb_to_app(ESP_GATTC_CONGEST_EVT, gattc_if, &param);
        break;
    }
    case BTA_GATTC_SRVC_CHG_EVT: {
        memcpy(param.srvc_chg.remote_bda, arg->remote_bda, sizeof(esp_bd_addr_t));
        btc_gattc_cb_to_app(ESP_GATTC_SRVC_CHG_EVT, ESP_GATT_IF_NONE, &param);
        break;
    }
    default:
        LOG_ERROR("%s: Unhandled event (%d)!", __FUNCTION__, msg->act);
        break;
    }

    // free the deep-copied data
    btc_gattc_free_req_data(msg);
}

#endif  ///GATTC_INCLUDED == TRUE