File content as of revision 55:0e4db6804c8d:

/* 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.
 */

#include "BlueNRGGattServer.h"
#include "mbed.h"
#include "BlueNRGGap.h"
#include "Utils.h"
                          
/**************************************************************************/
/*!
    @brief  Adds a new service to the GATT table on the peripheral

    @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;
        
    type = (service.getUUID()).shortOrLong();
    DEBUG("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();   
        
        //TODO:128 bit support for UUID
        COPY_UUID_128(primary_base_uuid, base_uuid[15],base_uuid[14],base_uuid[13],base_uuid[12],base_uuid[11],base_uuid[10],base_uuid[9],
                      base_uuid[8],base_uuid[7],base_uuid[6],base_uuid[5],base_uuid[4],primary_short_uuid[1],primary_short_uuid[0],base_uuid[1],base_uuid[0]);
    }
    
    //TODO: Check UUID existence??
    if(type==UUID::UUID_TYPE_SHORT) {
        ret = aci_gatt_add_serv(UUID_TYPE_16, primary_short_uuid, PRIMARY_SERVICE, 7, 
                            &servHandle);
    }
    else if(type==UUID::UUID_TYPE_LONG) {
        ret = aci_gatt_add_serv(UUID_TYPE_128, primary_base_uuid, PRIMARY_SERVICE, 7, 
                            &servHandle);
    }
    
    service.setHandle(servHandle);
    //serviceHandleVector.push_back(servHandle);
    DEBUG("added servHandle handle =%u\n\r", servHandle);
    tHalUint16 bleCharacteristic;
    
    //TODO: iterate to include all characteristics
    for (uint8_t i = 0; i < service.getCharacteristicCount(); 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);
        
        if(type==UUID::UUID_TYPE_LONG) {
            base_char_uuid = (p_char->getValueAttribute().getUUID()).getBaseUUID();
            
            COPY_UUID_128(char_base_uuid, base_char_uuid[15],base_char_uuid[14],base_char_uuid[13],base_char_uuid[12],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],int_8_uuid[1],int_8_uuid[0],base_char_uuid[1],base_char_uuid[0]);
        }
        //TODO: Check UUID existence??
        DEBUG("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)
        */
        tGattServerEvent Gatt_Evt_Mask = 0x0;
    
        if((p_char->getProperties() &
             (GattCharacteristic::BLE_GATT_CHAR_PROPERTIES_WRITE_WITHOUT_RESPONSE|
              GattCharacteristic::BLE_GATT_CHAR_PROPERTIES_WRITE))) {
                DEBUG("Setting up Gatt GATT_SERVER_ATTR_WRITE Mask\n\r");
                Gatt_Evt_Mask = Gatt_Evt_Mask | GATT_SERVER_ATTR_WRITE;
            }
        if((p_char->getProperties() &
             (GattCharacteristic::BLE_GATT_CHAR_PROPERTIES_READ|
              GattCharacteristic::BLE_GATT_CHAR_PROPERTIES_NOTIFY| GattCharacteristic::BLE_GATT_CHAR_PROPERTIES_INDICATE))) {
                DEBUG("Setting up Gatt GATT_INTIMATE_APPL_WHEN_READ_N_WAIT Mask\n\r");
                Gatt_Evt_Mask = Gatt_Evt_Mask | GATT_INTIMATE_APPL_WHEN_READ_N_WAIT; 
            }    //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);
        }
        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);
        }
        /* Update the characteristic handle */
        uint16_t charHandle = characteristicCount;   
        
        bleCharHanldeMap.insert(std::pair<tHalUint16, tHalUint16>(bleCharacteristic, servHandle)); 
        
        p_characteristics[characteristicCount++] = p_char;
        p_char->getValueAttribute().setHandle(bleCharacteristic);    //Set the characteristic count as the corresponding char handle
        DEBUG("added bleCharacteristic handle =%u\n\r", bleCharacteristic);
        
        if ((p_char->getValueAttribute().getValuePtr() != NULL) && (p_char->getValueAttribute().getInitialLength() > 0)) {
                //updateValue(charHandle, p_char->getValuePtr(), p_char->getInitialLength(), false /* localOnly */);
                updateValue(p_char->getValueAttribute().getHandle(), p_char->getValueAttribute().getValuePtr(), p_char->getValueAttribute().getInitialLength(), false /* localOnly */);
        }
        
        // add descriptors now
        uint16_t descHandle = 0;
        for(uint8_t descIndex=0; descIndex<p_char->getDescriptorCount(); descIndex++) {
                GattAttribute *descriptor = p_char->getDescriptor(descIndex);
                uint16_t shortUUID = descriptor->getUUID().getShortUUID();
                const tHalUint8 uuidArray[] = {(shortUUID>>8)&0xFF, (shortUUID&0xFF)};
                ret = aci_gatt_add_char_desc(service.getHandle(), p_char->getValueAttribute().getHandle(), 
                                        CHAR_DESC_TYPE_16_BIT, uuidArray, descriptor->getMaxLength(), descriptor->getInitialLength(), 
                                        descriptor->getValuePtr(), CHAR_DESC_SECURITY_PERMISSION, CHAR_DESC_ACCESS_PERMISSION, GATT_SERVER_ATTR_READ_WRITE,
                                        MIN_ENCRY_KEY_SIZE, CHAR_ATTRIBUTE_LEN_IS_FIXED, &descHandle);
                if(ret==(tBleStatus)0) {
                    DEBUG("Descriptor added successfully, descriptor handle=%d\n\r", descHandle);
                    descriptor->setHandle(descHandle);
                }
        }
    }    
                       
    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 the service
            and characteristic index fields

    @param[in]  charHandle
                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]  len
                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::readValue(uint16_t charHandle, uint8_t buffer[], uint16_t *const lengthP)
{
    DEBUG("ReadValue() Not Supported\n\r");
    return BLE_ERROR_NONE;
}

/**************************************************************************/
/*!
    @brief  Updates the value of a characteristic, based on the service
            and characteristic index fields

    @param[in]  charHandle
                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]  len
                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::updateValue(uint16_t charHandle, uint8_t buffer[], uint16_t len, bool localOnly)
{
  tBleStatus ret;    
  tHalUint8 buff[2];
  
  DEBUG("updating bleCharacteristic charHandle =%u, corresponding serviceHanle= %u\n\r", charHandle, bleCharHanldeMap.find(charHandle)->second);  
  // <hdd>ret = aci_gatt_update_char_value(servHandle, bleCharacteristicHandles[charHandle], 0, len, buffer);
  ret = aci_gatt_update_char_value(bleCharHanldeMap.find(charHandle)->second, charHandle, 0, len, buffer);

  if (ret != BLE_STATUS_SUCCESS){
      DEBUG("Error while updating characteristic.\n\r") ;
      return BLE_ERROR_PARAM_OUT_OF_RANGE ; //Not correct Error Value 
      //FIXME: Define Error values equivalent to BlueNRG Error Codes.
    }

  //Generate Data Sent Event Here? (GattServerEvents::GATT_EVENT_DATA_SENT)  //FIXME: Is this correct?
  //Check if characteristic property is NOTIFY|INDICATE, if yes generate event
  GattCharacteristic *p_char = BlueNRGGattServer::getInstance().getCharacteristicFromHandle(charHandle);
  if(p_char->getProperties() &  (GattCharacteristic::BLE_GATT_CHAR_PROPERTIES_NOTIFY
                                  | GattCharacteristic::BLE_GATT_CHAR_PROPERTIES_INDICATE)) {
          BlueNRGGattServer::getInstance().handleEvent(GattServerEvents::GATT_EVENT_DATA_SENT, charHandle);
      }
  
  return BLE_ERROR_NONE;
}

/**************************************************************************/
/*!
    @brief  Reads a value according to the handle provided

    @param[in]  charHandle
                The handle of the GattCharacteristic 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(tHalUint16 handle)
{
    //signed short refvalue;
    uint16_t gapConnectionHandle = BlueNRGGap::getInstance().getConnectionHandle();
    
    tBleStatus ret;
    uint16_t data;
    tHalUint8 buff[2];
        
    data = 450 + ((uint64_t)rand()*100)/RAND_MAX;
    STORE_LE_16(buff,data);
    
    //ret = aci_gatt_update_char_value(servHandle, handle, 0, sizeof(buff), buff);
    //ret = aci_gatt_read_charac_val(gapConnectionHandle, handle);
    
    //EXIT:
    if(gapConnectionHandle != 0)
    aci_gatt_allow_read(gapConnectionHandle);
}

/**************************************************************************/
/*!
    @brief  Returns the GattCharacteristic according to the handle provided

    @param[in]  charHandle
                The handle of the GattCharacteristic

    @returns    ble_error_t

    @retval     BLE_ERROR_NONE
                Everything executed properly

    @section EXAMPLE

    @code

    @endcode
*/
/**************************************************************************/
GattCharacteristic* BlueNRGGattServer::getCharacteristicFromHandle(tHalUint16 attrHandle)
{
    GattCharacteristic *p_char = NULL;
    int i;
    uint16_t handle;
#if 1
    //DEBUG("BlueNRGGattServer::getCharacteristicFromHandle()>>Attribute Handle received 0x%x\n\r",attrHandle);
    for(i=0; i<characteristicCount; i++)
    {
        handle = p_characteristics[i]->getValueAttribute().getHandle();
        
        if(i==characteristicCount-1)//Last Characteristic check
        {
            if(attrHandle>=bleCharacteristicHandles[handle])
            {
                p_char = p_characteristics[i];
                DEBUG("Found Characteristic Properties 0x%x\n\r",p_char->getProperties());
                break;
                }            
        }
        else {
            //Testing if attribute handle is between two Characteristic Handles
            if(attrHandle>=bleCharacteristicHandles[handle] && attrHandle<bleCharacteristicHandles[handle+1])
            {
                p_char = p_characteristics[i];
                //DEBUG("Found Characteristic Properties 0x%x\n\r",p_char->getProperties());
                break;
            } else continue;
        }
    }
#endif    
    return p_char;
}