Diff: shields/TARGET_ST_BLUENRG/source/BlueNRGGattServer.cpp

Revision:

0:29983394c6b6

diff -r 000000000000 -r 29983394c6b6 shields/TARGET_ST_BLUENRG/source/BlueNRGGattServer.cpp
--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/shields/TARGET_ST_BLUENRG/source/BlueNRGGattServer.cpp	Thu Apr 13 04:48:11 2017 +0000
@@ -0,0 +1,753 @@
+/* mbed Microcontroller Library
+* Copyright (c) 2006-2013 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.
+*/
+/**
+  ******************************************************************************
+  * @file    BlueNRGGattServer.cpp
+  * @author  STMicroelectronics
+  * @brief   Implementation of BlueNRG BLE_API GattServer Class
+  ******************************************************************************
+  * @copy
+  *
+  * THE PRESENT FIRMWARE WHICH IS FOR GUIDANCE ONLY AIMS AT PROVIDING CUSTOMERS
+  * WITH CODING INFORMATION REGARDING THEIR PRODUCTS IN ORDER FOR THEM TO SAVE
+  * TIME. AS A RESULT, STMICROELECTRONICS SHALL NOT BE HELD LIABLE FOR ANY
+  * DIRECT, INDIRECT OR CONSEQUENTIAL DAMAGES WITH RESPECT TO ANY CLAIMS ARISING
+  * FROM THE CONTENT OF SUCH FIRMWARE AND/OR THE USE MADE BY CUSTOMERS OF THE
+  * CODING INFORMATION CONTAINED HEREIN IN CONNECTION WITH THEIR PRODUCTS.
+  *
+  * <h2><center>&copy; COPYRIGHT 2013 STMicroelectronics</center></h2>
+  */
+
+/** @defgroup BlueNRGGATTSERVER
+ *  @brief BlueNRG BLE_API GattServer Adaptation
+ *  @{
+ */
+
+#include "BlueNRGGattServer.h"
+#ifdef YOTTA_CFG_MBED_OS
+    #include "mbed-drivers/mbed.h"
+#else
+    #include "mbed.h"
+#endif 
+#include "BlueNRGGap.h"
+#include "ble_utils.h"
+#include "ble_debug.h"
+
+/**************************************************************************/
+/*!
+    @brief  Adds a new service to the GATT table on the peripheral
+
+    @params[in] service
+                Pointer to instance of the Gatt Server to add
+
+    @returns    ble_error_t
+
+    @retval     BLE_ERROR_NONE
+                Everything executed properly
+
+    @section EXAMPLE
+
+    @code
+
+    @endcode
+*/
+/**************************************************************************/
+ble_error_t BlueNRGGattServer::addService(GattService &service)
+{
+    /* ToDo: Make sure we don't overflow the array, etc. */
+    /* ToDo: Make sure this service UUID doesn't already exist (?) */
+    /* ToDo: Basic validation */
+
+    tBleStatus ret;
+    uint8_t type;
+    uint16_t short_uuid;
+    uint8_t primary_short_uuid[2];
+    uint8_t primary_base_uuid[16];
+    uint8_t char_base_uuid[16];
+    const uint8_t *base_uuid;
+    const uint8_t *base_char_uuid;
+
+    uint8_t charsCount = service.getCharacteristicCount();
+    const uint8_t available_characteristics = BLE_TOTAL_CHARACTERISTICS - characteristicCount;
+
+    // check that there is enough characteristics left in the
+    // characteristic array.
+    if (charsCount > available_characteristics) {
+        PRINTF("charCount = %u and characteristicCount = %u\r\n", charsCount, available_characteristics);
+        return BLE_ERROR_NO_MEM;
+    }
+
+    const uint16_t maxAttrRecords = computeAttributesRecord(service);
+
+    type = (service.getUUID()).shortOrLong();
+    PRINTF("AddService(): Type:%d\n\r", type);
+
+    /* Add the service to the BlueNRG */
+    short_uuid = (service.getUUID()).getShortUUID();
+    STORE_LE_16(primary_short_uuid, short_uuid);
+
+    if(type==UUID::UUID_TYPE_LONG) {
+        base_uuid = (service.getUUID()).getBaseUUID();
+
+        COPY_UUID_128(primary_base_uuid, base_uuid[15],base_uuid[14],primary_short_uuid[1],primary_short_uuid[0],base_uuid[11],base_uuid[10],base_uuid[9],base_uuid[8],base_uuid[7],base_uuid[6],base_uuid[5],base_uuid[4],base_uuid[3],base_uuid[2],base_uuid[1],base_uuid[0]);
+    }
+
+    ret = BLE_STATUS_SUCCESS;
+
+    if(type==UUID::UUID_TYPE_SHORT) {
+        ret = aci_gatt_add_serv(UUID_TYPE_16,
+                                primary_short_uuid,
+                                PRIMARY_SERVICE,
+                                maxAttrRecords/*7*/,
+                                &servHandle);
+        PRINTF("aci_gatt_add_serv UUID_TYPE_SHORT ret=%d\n\r", ret);
+
+    } else if(type==UUID::UUID_TYPE_LONG) {
+        ret = aci_gatt_add_serv(UUID_TYPE_128,
+                                primary_base_uuid,
+                                PRIMARY_SERVICE,
+                                maxAttrRecords/*7*/,
+                                &servHandle);
+        PRINTF("aci_gatt_add_serv UUID_TYPE_LONG ret=%d\n\r", ret);
+    }
+
+    switch (ret) {
+        case BLE_STATUS_SUCCESS:
+            break;
+
+        case BLE_STATUS_INVALID_PARAMETER:
+            return BLE_ERROR_INVALID_PARAM;
+
+        case BLE_STATUS_OUT_OF_HANDLE:
+        case BLE_STATUS_INSUFFICIENT_RESOURCES:
+        case ERR_UNSPECIFIED_ERROR:
+            return BLE_ERROR_NO_MEM;
+
+        case BLE_STATUS_ERROR:
+        default:
+            return BLE_ERROR_INTERNAL_STACK_FAILURE;
+    }
+
+
+
+    service.setHandle(servHandle);
+    //serviceHandleVector.push_back(servHandle);
+    PRINTF("added servHandle handle =%u\n\r", servHandle);
+    uint16_t bleCharacteristic;
+
+    //iterate to include all characteristics
+    for (uint8_t i = 0; i < charsCount; i++) {
+        GattCharacteristic *p_char = service.getCharacteristic(i);
+        uint16_t char_uuid = (p_char->getValueAttribute().getUUID()).getShortUUID();
+
+        uint8_t int_8_uuid[2];
+        STORE_LE_16(int_8_uuid, char_uuid);
+
+        type = (p_char->getValueAttribute().getUUID()).shortOrLong();
+
+        if(type==UUID::UUID_TYPE_LONG) {
+            base_char_uuid = (p_char->getValueAttribute().getUUID()).getBaseUUID();
+#ifdef DEBUG
+            for(uint8_t j=0; j<16; j++) {
+                PRINTF("base_char_uuid[%d] 0x%02x ", j, base_char_uuid[j]);
+            }
+            PRINTF("\n\r");
+#endif
+            COPY_UUID_128(char_base_uuid,base_char_uuid[15],base_char_uuid[14],int_8_uuid[1],int_8_uuid[0],base_char_uuid[11],base_char_uuid[10],base_char_uuid[9],base_char_uuid[8],base_char_uuid[7],base_char_uuid[6],base_char_uuid[5],base_char_uuid[4],base_char_uuid[3],base_char_uuid[2],base_char_uuid[1],base_char_uuid[0]);
+        }
+
+        PRINTF("Char Properties 0x%x\n\r", p_char->getProperties());
+        /*
+        * Gatt_Evt_Mask -> HardCoded (0)
+        * Encryption_Key_Size -> Hardcoded (16)
+        * isVariable (variable length value field) -> Hardcoded (1)
+        */
+        uint8_t Gatt_Evt_Mask = 0x0;
+
+        if((p_char->getProperties() &
+                    (GattCharacteristic::BLE_GATT_CHAR_PROPERTIES_WRITE_WITHOUT_RESPONSE|
+                        GattCharacteristic::BLE_GATT_CHAR_PROPERTIES_WRITE))) {
+            PRINTF("Setting up Gatt GATT_NOTIFY_ATTRIBUTE_WRITE Mask\n\r");
+            Gatt_Evt_Mask = Gatt_Evt_Mask | GATT_NOTIFY_ATTRIBUTE_WRITE  | GATT_NOTIFY_WRITE_REQ_AND_WAIT_FOR_APPL_RESP;
+        }
+        if((p_char->getProperties() &
+                    (GattCharacteristic::BLE_GATT_CHAR_PROPERTIES_READ|
+                        GattCharacteristic::BLE_GATT_CHAR_PROPERTIES_NOTIFY| GattCharacteristic::BLE_GATT_CHAR_PROPERTIES_INDICATE))) {
+            PRINTF("Setting up Gatt GATT_NOTIFY_READ_REQ_AND_WAIT_FOR_APPL_RESP Mask\n\r");
+            Gatt_Evt_Mask = Gatt_Evt_Mask | GATT_NOTIFY_READ_REQ_AND_WAIT_FOR_APPL_RESP;
+        }    //This will support also GATT_SERVER_ATTR_READ_WRITE since it will be covered by previous if() check.
+
+        if(type==UUID::UUID_TYPE_SHORT) {
+            ret =  aci_gatt_add_char(service.getHandle(),
+                                     UUID_TYPE_16,
+                                     int_8_uuid,
+                                     p_char->getValueAttribute().getMaxLength() /*2*/ /*Value Length*/,
+                                     p_char->getProperties(),
+                                     ATTR_PERMISSION_NONE,
+                                     Gatt_Evt_Mask /*Gatt_Evt_Mask*/,
+                                     16 /*Encryption_Key_Size*/,
+                                     1 /*isVariable*/,
+                                     &bleCharacteristic);
+
+            PRINTF("aci_gatt_add_char UUID_TYPE_16 props=%d MaxLength=%d ret=%d\n\r",
+                    p_char->getProperties(), p_char->getValueAttribute().getMaxLength(), ret);
+
+        } else if(type==UUID::UUID_TYPE_LONG) {
+            ret =  aci_gatt_add_char(service.getHandle(),
+                                     UUID_TYPE_128,
+                                     char_base_uuid,
+                                     p_char->getValueAttribute().getMaxLength() /*2*/ /*Value Length*/,
+                                     p_char->getProperties(),
+                                     ATTR_PERMISSION_NONE,
+                                     Gatt_Evt_Mask /*Gatt_Evt_Mask*/,
+                                     16 /*Encryption_Key_Size*/,
+                                     1 /*isVariable*/,
+                                     &bleCharacteristic);
+
+            PRINTF("aci_gatt_add_char UUID_TYPE_128 props=%d MaxLength=%d ret=%d\n\r",
+                    p_char->getProperties(), p_char->getValueAttribute().getMaxLength(), ret);
+        }
+
+        switch (ret) {
+            case BLE_STATUS_SUCCESS:
+                break;
+
+            case ERR_UNSPECIFIED_ERROR:
+            case BLE_STATUS_INSUFFICIENT_RESOURCES:
+            case BLE_STATUS_OUT_OF_HANDLE:
+                // TODO remove characteristics and the service previously added.
+                // remove service in the stack by using: Aci_Gatt_Del_Service
+                // remove characteristics in the stack by using: Aci_Gatt_Del_Char
+                // update service counter
+                // destroy registered characteristic and updat echaracteristic counter
+                return BLE_ERROR_NO_MEM;
+
+            case BLE_STATUS_INVALID_HANDLE:
+            case BLE_STATUS_INVALID_PARAMETER:
+            case BLE_STATUS_CHARAC_ALREADY_EXISTS:
+            // TODO remove characteristics and the service previously added.
+            // remove service in the stack by using: Aci_Gatt_Del_Service
+            // remove characteristics in the stack by using: Aci_Gatt_Del_Char
+            // update service counter
+            // destroy registered characteristic and updat echaracteristic counter
+                return BLE_ERROR_INVALID_PARAM;
+
+            case BLE_STATUS_ERROR:
+            default:
+            // TODO remove characteristics and the service previously added.
+            // remove service in the stack by using: Aci_Gatt_Del_Service
+            // remove characteristics in the stack by using: Aci_Gatt_Del_Char
+            // update service counter
+            // destroy registered characteristic and updat echaracteristic counter
+                return BLE_ERROR_INTERNAL_STACK_FAILURE;
+        }
+
+        bleCharHandleMap.insert(std::pair<uint16_t, uint16_t>(bleCharacteristic, servHandle));
+
+        p_characteristics[characteristicCount++] = p_char;
+        /* Set the characteristic value handle */
+        p_char->getValueAttribute().setHandle(bleCharacteristic+BlueNRGGattServer::CHAR_VALUE_HANDLE);
+        PRINTF("added bleCharacteristic (value handle =%u)\n\r", p_char->getValueAttribute().getHandle());
+
+        if ((p_char->getValueAttribute().getValuePtr() != NULL) && (p_char->getValueAttribute().getLength() > 0)) {
+            ble_error_t err = write(p_char->getValueAttribute().getHandle(),
+                  p_char->getValueAttribute().getValuePtr(),
+                  p_char->getValueAttribute().getLength(), false /* localOnly */);
+            if (err) {
+                PRINTF("ERROR HERE !!!!\r\n");
+                return err;
+            }
+        }
+
+        // add descriptors now
+        uint16_t descHandle = 0;
+        PRINTF("p_char->getDescriptorCount()=%d\n\r", p_char->getDescriptorCount());
+
+        for(uint8_t descIndex=0; descIndex<p_char->getDescriptorCount(); descIndex++) {
+            GattAttribute *descriptor = p_char->getDescriptor(descIndex);
+            uint8_t desc_uuid[16] = { 0 };
+
+
+            uint8_t desc_uuid_type = CHAR_DESC_TYPE_16_BIT;
+            STORE_LE_16(desc_uuid, descriptor->getUUID().getShortUUID());
+
+            if((descriptor->getUUID()).shortOrLong() == UUID::UUID_TYPE_LONG) {
+                desc_uuid_type = CHAR_DESC_TYPE_128_BIT;
+                const uint8_t* base_desc_uuid  = descriptor->getUUID().getBaseUUID();
+
+                COPY_UUID_128(desc_uuid, base_desc_uuid[15], base_desc_uuid[14],base_desc_uuid[13],base_desc_uuid[12], base_desc_uuid[11], base_desc_uuid[10], base_desc_uuid[9], base_desc_uuid[8], base_desc_uuid[7], base_desc_uuid[6], base_desc_uuid[5], base_desc_uuid[4], base_desc_uuid[3], base_desc_uuid[2], base_desc_uuid[1], base_desc_uuid[0]);
+            }
+
+            ret = aci_gatt_add_char_desc(service.getHandle(),
+                                         bleCharacteristic,
+                                         desc_uuid_type,
+                                         desc_uuid,
+                                         descriptor->getMaxLength(),
+                                         descriptor->getLength(),
+                                         descriptor->getValuePtr(),
+                                         CHAR_DESC_SECURITY_PERMISSION,
+                                         CHAR_DESC_ACCESS_PERMISSION,
+                                         GATT_NOTIFY_ATTRIBUTE_WRITE,
+                                         MIN_ENCRY_KEY_SIZE,
+                                         CHAR_ATTRIBUTE_LEN_IS_FIXED,
+                                         &descHandle);
+            PRINTF("Adding Descriptor descriptor handle=%d ret=%d\n\r", descHandle, ret);
+
+            switch (ret) {
+                case BLE_STATUS_SUCCESS:
+                    PRINTF("Descriptor added successfully, descriptor handle=%d\n\r", descHandle);
+                    descriptor->setHandle(descHandle);
+                    break;
+
+                case ERR_UNSPECIFIED_ERROR:
+                case BLE_STATUS_INSUFFICIENT_RESOURCES:
+                case BLE_STATUS_OUT_OF_HANDLE:
+                    // TODO remove characteristics and the service previously added.
+                    // remove service in the stack by using: Aci_Gatt_Del_Service
+                    // remove characteristics in the stack by using: Aci_Gatt_Del_Char
+                    // update service counter
+                    // destroy registered characteristic and updat echaracteristic counter
+                    return BLE_ERROR_NO_MEM;
+
+                case BLE_STATUS_INVALID_HANDLE:
+                case BLE_STATUS_INVALID_PARAMETER:
+                // TODO remove characteristics and the service previously added.
+                // remove service in the stack by using: Aci_Gatt_Del_Service
+                // remove characteristics in the stack by using: Aci_Gatt_Del_Char
+                // update service counter
+                // destroy registered characteristic and updat echaracteristic counter
+                    return BLE_ERROR_INVALID_PARAM;
+
+                case BLE_STATUS_INVALID_OPERATION:
+                    return BLE_ERROR_OPERATION_NOT_PERMITTED;
+
+                case BLE_STATUS_ERROR:
+                default:
+                // TODO remove characteristics and the service previously added.
+                // remove service in the stack by using: Aci_Gatt_Del_Service
+                // remove characteristics in the stack by using: Aci_Gatt_Del_Char
+                // update service counter
+                // destroy registered characteristic and updat echaracteristic counter
+                    return BLE_ERROR_INTERNAL_STACK_FAILURE;
+            }
+        }
+    }
+
+    serviceCount++;
+
+    //FIXME: There is no GattService pointer array in GattServer.
+    //        There should be one? (Only the user is aware of GattServices!) Report to forum.
+
+    return BLE_ERROR_NONE;
+}
+
+/**************************************************************************/
+/*!
+    @brief  Reads the value of a characteristic, based on char handle
+
+    @param[in]  attributeHandle
+                The handle of the GattCharacteristic to read from
+    @param[in]  buffer
+                Buffer to hold the the characteristic's value
+                (raw byte array in LSB format)
+    @param[in]  lengthP
+                The number of bytes read into the buffer
+
+    @returns    ble_error_t
+
+    @retval     BLE_ERROR_NONE
+                Everything executed properly
+
+    @section EXAMPLE
+
+    @code
+
+    @endcode
+*/
+/**************************************************************************/
+ble_error_t BlueNRGGattServer::read(GattAttribute::Handle_t attributeHandle, uint8_t buffer[], uint16_t *lengthP)
+{
+  tBleStatus ret;
+  uint16_t charHandle = attributeHandle;
+
+  ret = aci_gatt_read_handle_value(charHandle, *lengthP, lengthP, buffer);
+
+  if(ret == BLE_STATUS_SUCCESS) {
+    return BLE_ERROR_NONE;
+  }
+  switch (ret) {
+  case ERR_INVALID_HCI_CMD_PARAMS:
+    return BLE_ERROR_INVALID_PARAM;
+  default:
+    return BLE_ERROR_UNSPECIFIED;
+  }
+}
+
+/**************************************************************************/
+/*!
+    @brief  Reads the value of a characteristic, based on the connection
+            and char handle
+
+    @param[in]  connectionHandle
+                The handle of the connection
+    @param[in]  attributeHandle
+                The handle of the GattCharacteristic to write to
+    @param[in]  buffer
+                Data to use when updating the characteristic's value
+                (raw byte array in LSB format)
+    @param[in]  lengthP
+                The number of bytes in buffer
+
+    @returns    ble_error_t
+
+    @retval     BLE_ERROR_NONE
+                Everything executed properly
+
+    @section EXAMPLE
+
+    @code
+
+    @endcode
+*/
+/**************************************************************************/
+ble_error_t BlueNRGGattServer::read(Gap::Handle_t connectionHandle,
+                                    GattAttribute::Handle_t attributeHandle,
+                                    uint8_t buffer[],
+                                    uint16_t *lengthP) {
+
+  /* avoid compiler warnings about unused variables */
+  (void)connectionHandle;
+  (void)attributeHandle;
+  (void)buffer;
+  (void)lengthP;
+
+  return BLE_ERROR_NONE;
+}
+
+ble_error_t BlueNRGGattServer::write(Gap::Handle_t connectionHandle,
+                                     GattAttribute::Handle_t,
+                                     const uint8_t[],
+                                     uint16_t, bool localOnly) {
+  /* avoid compiler warnings about unused variables */
+  (void)connectionHandle;
+  (void)localOnly;
+
+  return BLE_ERROR_NONE;
+}
+
+ble_error_t BlueNRGGattServer::write(GattAttribute::Handle_t attributeHandle, const uint8_t buffer[], uint16_t len, bool localOnly)
+{
+    /* avoid compiler warnings about unused variables */
+    (void)localOnly;
+
+    // check that the len of the data to write are compatible with the characteristic
+    GattCharacteristic* characteristic = getCharacteristicFromHandle(attributeHandle);
+    if (!characteristic) {
+        PRINTF("characteristic not found\r\n");
+        return BLE_ERROR_INVALID_PARAM;
+    }
+
+    // if the attribute handle is the attribute handle of the characteristic value then
+    // write the value
+    if (attributeHandle == characteristic->getValueHandle()) {
+        // assert the len in input is correct for this characteristic
+        const GattAttribute& value_attribute = characteristic->getValueAttribute();
+
+        // reject write if the lenght exceed the maximum lenght of this attribute
+        if (value_attribute.getMaxLength() < len) {
+            PRINTF("invalid variable length: %u, max length is: %u\r\n", len, value_attribute.getMaxLength());
+            return BLE_ERROR_INVALID_PARAM;
+        }
+
+        // reject write if the attribute size is fixed and the lenght in input is different than the
+        // length of the attribute.
+        if (value_attribute.hasVariableLength() == false && value_attribute.getMaxLength() != len) {
+            PRINTF("invalid fixed length: %u, len should be %u\r\n", len, value_attribute.getMaxLength());
+            return BLE_ERROR_INVALID_PARAM;
+        }
+
+        tBleStatus ret;
+
+        uint16_t charHandle = characteristic->getValueHandle() - BlueNRGGattServer::CHAR_VALUE_HANDLE;
+
+        PRINTF("updating bleCharacteristic valueHandle=%u,\
+                corresponding serviceHandle=%u len=%d\n\r",
+                attributeHandle, bleCharHandleMap.find(charHandle)->second, len);
+
+        /*
+         * If notifications (or indications) are enabled on that characteristic, a notification (or indication)
+         * will be sent to the client after sending this command to the BlueNRG.
+         */
+        ret = aci_gatt_update_char_value(bleCharHandleMap.find(charHandle)->second, charHandle, 0, len, buffer);
+
+        if (ret != BLE_STATUS_SUCCESS){
+          PRINTF("Error while updating characteristic (ret=0x%x).\n\r", ret);
+          switch (ret) {
+            case BLE_STATUS_INVALID_HANDLE:
+            case BLE_STATUS_INVALID_PARAMETER:
+              return BLE_ERROR_INVALID_PARAM;
+            default:
+              return BLE_STACK_BUSY;
+          }
+        }
+
+        return BLE_ERROR_NONE;
+    } else {
+        // write this handle has a descriptor handle
+        uint16_t charHandle = characteristic->getValueHandle() - BlueNRGGattServer::CHAR_VALUE_HANDLE;
+        uint16_t service_handle = bleCharHandleMap.find(charHandle)->second;
+
+        tBleStatus ret = aci_gatt_set_desc_value(
+            service_handle,
+            charHandle,
+            attributeHandle,
+            0,
+        	len,
+        	buffer
+        );
+
+        if (ret != BLE_STATUS_SUCCESS){
+          PRINTF("Error while updating characteristic descriptor (ret=0x%x).\n\r", ret);
+          switch (ret) {
+            case BLE_STATUS_INVALID_HANDLE:
+            case BLE_STATUS_INVALID_PARAMETER:
+              return BLE_ERROR_INVALID_PARAM;
+            default:
+              return BLE_STACK_BUSY;
+          }
+        }
+
+        return BLE_ERROR_NONE;
+    }
+}
+
+/**************************************************************************/
+/*!
+    @brief  Reads a value according to the handle provided
+
+    @param[in]  attributeHandle
+                The handle of the attribute to read from
+
+    @returns    ble_error_t
+
+    @retval     BLE_ERROR_NONE
+                Everything executed properly
+
+    @section EXAMPLE
+
+    @code
+
+    @endcode
+*/
+/**************************************************************************/
+ble_error_t BlueNRGGattServer::Read_Request_CB(uint16_t attributeHandle)
+{
+    uint16_t gapConnectionHandle = BlueNRGGap::getInstance().getConnectionHandle();
+
+    GattReadCallbackParams readParams;
+    readParams.handle = attributeHandle;
+
+    //PRINTF("readParams.handle = %d\n\r", readParams.handle);
+    HCIDataReadEvent(&readParams);
+
+    //EXIT:
+    if(gapConnectionHandle != 0){
+        //PRINTF("Calling aci_gatt_allow_read\n\r");
+        aci_gatt_allow_read(gapConnectionHandle);
+    }
+
+    return BLE_ERROR_NONE;
+}
+
+// ask if the write request should be accepted of rejected
+// return 0 in case of success or an ATT error response in
+// case of faillure
+uint8_t BlueNRGGattServer::Write_Request_CB(
+    uint16_t connection_handle, uint16_t attr_handle, uint8_t data_length,
+    const uint8_t* data) {
+
+    GattCharacteristic* characteristic = getCharacteristicFromHandle(attr_handle);
+    if(!characteristic) {
+        return AUTH_CALLBACK_REPLY_ATTERR_INVALID_HANDLE & 0xFF;
+    }
+
+    // check if the data length is in range
+    if (characteristic->getValueAttribute().getMaxLength() < data_length) {
+        return AUTH_CALLBACK_REPLY_ATTERR_INVALID_ATT_VAL_LENGTH & 0xFF;
+    }
+
+    // if the length of the characteristic value is fixed
+    // then the data in input should be of that length
+    if (characteristic->getValueAttribute().hasVariableLength() == false &&
+        characteristic->getValueAttribute().getMaxLength() != data_length) {
+        return AUTH_CALLBACK_REPLY_ATTERR_INVALID_ATT_VAL_LENGTH & 0xFF;
+    }
+
+    GattWriteAuthCallbackParams params = {
+        connection_handle,
+        attr_handle,
+        /* offset */ 0,
+        data_length,
+        data,
+        /* authorizationReply */ AUTH_CALLBACK_REPLY_ATTERR_WRITE_NOT_PERMITTED
+    };
+
+    return characteristic->authorizeWrite(&params) & 0xFF;
+}
+
+/**************************************************************************/
+/*!
+    @brief  Returns the GattCharacteristic according to the handle provided
+
+    @param[in]  attrHandle
+                The handle of the attribute
+
+    @returns    ble_error_t
+
+    @retval     BLE_ERROR_NONE
+                Everything executed properly
+
+    @section EXAMPLE
+
+    @code
+
+    @endcode
+*/
+/**************************************************************************/
+GattCharacteristic* BlueNRGGattServer::getCharacteristicFromHandle(uint16_t attrHandle)
+{
+    GattCharacteristic *p_char = NULL;
+    int i;
+    uint16_t handle, handle_1;
+
+    PRINTF("BlueNRGGattServer::getCharacteristicFromHandle()>>Attr Handle received %d\n\r",attrHandle);
+    for(i=0; i<characteristicCount; i++)
+    {
+        handle = p_characteristics[i]->getValueAttribute().getHandle()-BlueNRGGattServer::CHAR_VALUE_HANDLE;
+        PRINTF("handle(%d)=%d\n\r", i, handle);
+        if(i==characteristicCount-1)//Last Characteristic check
+        {
+            if(attrHandle>=handle)
+            {
+                p_char = p_characteristics[i];
+                PRINTF("Found Characteristic Properties 0x%x (handle=%d)\n\r",p_char->getProperties(), handle);
+                break;
+            }
+        }
+        else {
+            handle_1 = p_characteristics[i+1]->getValueAttribute().getHandle()-BlueNRGGattServer::CHAR_VALUE_HANDLE;
+            //Testing if attribute handle is between two Characteristic Handles
+            if(attrHandle>=handle && attrHandle<handle_1)
+            {
+                p_char = p_characteristics[i];
+                PRINTF("Found Characteristic Properties 0x%x (handle=%d handle_1=%d)\n\r",p_char->getProperties(), handle, handle_1);
+                break;
+            } else continue;
+        }
+    }
+
+    return p_char;
+}
+
+void BlueNRGGattServer::HCIDataWrittenEvent(const GattWriteCallbackParams *params) {
+    this->handleDataWrittenEvent(params);
+}
+
+void BlueNRGGattServer::HCIDataReadEvent(const GattReadCallbackParams *params) {
+    PRINTF("Called HCIDataReadEvent\n\r");
+    this->handleDataReadEvent(params);
+}
+
+void BlueNRGGattServer::HCIEvent(GattServerEvents::gattEvent_e type, uint16_t charHandle) {
+    this->handleEvent(type, charHandle);
+}
+
+void BlueNRGGattServer::HCIDataSentEvent(unsigned count) {
+    this->handleDataSentEvent(count);
+}
+
+
+ble_error_t BlueNRGGattServer::initializeGATTDatabase(void)   {
+    // <TODO>
+    return (ble_error_t)0;
+}
+
+/**************************************************************************/
+/*!
+    @brief  Clear BlueNRGGattServer's state.
+
+    @returns    ble_error_t
+
+    @retval     BLE_ERROR_NONE
+                Everything executed properly
+*/
+/**************************************************************************/
+ble_error_t BlueNRGGattServer::reset(void)
+{
+    /* Clear all state that is from the parent, including private members */
+    if (GattServer::reset() != BLE_ERROR_NONE) {
+        return BLE_ERROR_INVALID_STATE;
+    }
+
+    /* Clear class members */
+    memset(p_characteristics,        0, sizeof(p_characteristics));
+    memset(bleCharacteristicHandles, 0, sizeof(bleCharacteristicHandles));
+    serviceCount = 0;
+    characteristicCount = 0;
+
+    return BLE_ERROR_NONE;
+}
+
+
+/// compute the number of attributes needed by this service.
+uint16_t BlueNRGGattServer::computeAttributesRecord(GattService& service) {
+    uint16_t attribute_records = 1;
+
+    for (uint8_t characteristic_index = 0; characteristic_index < service.getCharacteristicCount(); ++characteristic_index) {
+        // add two attributes, one for the characteristic declaration
+        // and the other for the characteristic value.
+        attribute_records += 2;
+
+        const GattCharacteristic* characteristic = service.getCharacteristic(characteristic_index);
+        const uint8_t properties = characteristic->getProperties();
+        // if notify or indicate are present, two attributes are
+        // needed
+        if ((properties & GattCharacteristic::BLE_GATT_CHAR_PROPERTIES_NOTIFY) ||
+            (properties & GattCharacteristic::BLE_GATT_CHAR_PROPERTIES_INDICATE)) {
+            attribute_records += 2;
+        }
+
+        // if broadcast is set, two attributes are needed
+        if (properties & GattCharacteristic::BLE_GATT_CHAR_PROPERTIES_BROADCAST) {
+            attribute_records += 2;
+        }
+
+        // if extended properties flag is set, two attributes are needed
+        if (properties & GattCharacteristic::BLE_GATT_CHAR_PROPERTIES_EXTENDED_PROPERTIES) {
+            attribute_records += 2;
+        }
+
+        attribute_records += characteristic->getDescriptorCount();
+    }
+
+    // for some reason, if there is just a service, this value should
+    // be equal to 5
+    if (attribute_records == 1) {
+        attribute_records = 5;
+    }
+
+    return attribute_records;
+}