BLE: Generic Access Service Adaptation layer

Add an abstraction which manage the state of the GAP service exposed by the GATT server.

Author: pan-

features/FEATURE_BLE/ble/pal/GenericAccessService.h

@@ -0,0 +1,162 @@
+/* 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_GENERIC_ACCESS_SERVICE_H_
+#define BLE_PAL_GENERIC_ACCESS_SERVICE_H_
+
+#include "GapTypes.h"
+#include "ble/ArrayView.h"
+#include "ble/blecommon.h"
+#include "ble/GapAdvertisingData.h"
+#include "ble/Gap.h"
+
+namespace ble {
+namespace pal {
+
+/**
+ * Manage state of the GAP service exposed by the GATT server.
+ *
+ * @see Bluetooth 4.2 Vol 3 PartC: 12 - GAP service and characteristics for GATT
+ * server.
+ */
+struct GenericAccessService {
+
+    /**
+     * Empty, default, constructor
+     */
+    GenericAccessService() { }
+
+    /**
+     * Virtual destructor
+     */
+    virtual ~GenericAccessService() { }
+
+    /**
+     * Acquire the length of the device name.
+     * The length can range from 0 (no device name) to 248 octets
+     *
+     * @param length The length of the device name currently stored in the GAP
+     * service.
+     *
+     * @return BLE_ERROR_NONE in case of success or the appropriate error code
+     * otherwise.
+     *
+     * @see Bluetooth 4.2 Vol 3 PartC: 12.1 - Device Name Characteristic
+     */
+    virtual ble_error_t get_device_name_length(uint8_t& length) = 0;
+
+    /**
+     * Get the current device name.
+     * The result is stored in the array pass in input if the operation
+     * succeed. Prior to this call the length of the device name can be acquired
+     * with a call to get_device_name_length.
+     *
+     * @param The array which will host the device name
+     *
+     * @return BLE_ERROR_NONE in case of success or the appropriate error code
+     * otherwise.
+     *
+     * @see Bluetooth 4.2 Vol 3 PartC: 12.1 - Device Name Characteristic
+     */
+    virtual ble_error_t get_device_name(ArrayView<uint8_t>& array) = 0;
+
+    /**
+     * Set the value of the device name characteristic exposed by the GAP GATT
+     * service.
+     *
+     * @param device_name The name of the device. If NULL the device name
+     * value has a length of 0.
+     *
+     * @return BLE_ERROR_NONE in case of success or the appropriate error code
+     * otherwise.
+     *
+     * @see Bluetooth 4.2 Vol 3 PartC: 12.1 - Device Name Characteristic
+     */
+    virtual ble_error_t set_device_name(const uint8_t* device_name) = 0;
+
+    /**
+     * Acquire the appearance stored in the appearance characteristic of the GAP
+     * GATT service.
+     *
+     * @param appearance: If the call succeed will contain the value of the
+     * appearance characteristic.
+     *
+     * @return BLE_ERROR_NONE in case of success or the appropriate error code
+     * otherwise.
+     *
+     * @see Bluetooth 4.2 Vol 3 PartC: 12.2 - Appearance Characteristic
+     */
+    virtual ble_error_t get_appearance(
+        GapAdvertisingData::Appearance& appearance
+    ) = 0;
+
+    /**
+     * Set the value of the appearance characteristic of the GAP GATT service.
+     *
+     * @param appearance: The appearance to set.
+     *
+     * @return BLE_ERROR_NONE in case of success or the appropriate error code
+     * otherwise.
+     *
+     * @see Bluetooth 4.2 Vol 3 PartC: 12.2 - Appearance Characteristic
+     */
+     virtual ble_error_t set_appearance(
+         GapAdvertisingData::Appearance appearance
+    ) = 0;
+
+    /**
+     * Acquire the peripheral prefered connection parameters stored in the GAP
+     * GATT service.
+     *
+     * @param parameters: If the call succeed will contain the value of
+     * the peripheral prefered connection parameters characteristic.
+     *
+     * @return BLE_ERROR_NONE in case of success or the appropriate error code
+     * otherwise.
+     *
+     * @see Bluetooth 4.2 Vol 3 PartC: 12.3 - Peripheral Preferred Connection
+     * Parameters Characteristic
+     */
+     virtual ble_error_t get_peripheral_prefered_connection_parameters(
+         ::Gap::ConnectionParams_t& parameters
+    ) = 0;
+
+    /**
+     * set the value of the peripheral prefered connection parameters stored in
+     * the GAP GATT service.
+     *
+     * @param parameters: If the peripheral prefered connection parameters
+     * to set.
+     *
+     * @return BLE_ERROR_NONE in case of success or the appropriate error code
+     * otherwise.
+     *
+     * @see Bluetooth 4.2 Vol 3 PartC: 12.3 - Peripheral Preferred Connection
+     * Parameters Characteristic
+     */
+    virtual ble_error_t set_peripheral_prefered_connection_parameters(
+        const ::Gap::ConnectionParams_t& parameters
+   ) = 0;
+
+private:
+    GenericAccessService(const GenericAccessService&);
+    GenericAccessService& operator=(const GenericAccessService&);
+};
+
+} // namespace pal
+} // namespace ble
+
+#endif /* BLE_PAL_GENERIC_ACCESS_SERVICE_H_ */