WorkCodes/CST92F25_SDK_V1.4/Software/BLE/components/profiles/Roles/gapgattserver.c

/**
 * @file	
 * @author	chipsea
 * @brief	
 * @version	0.1
 * @date	2020-11-30
 * @copyright Copyright (c) 2020, CHIPSEA Co., Ltd.
 * @note
 */

/**************************************************************************************************
  Filename:       gapgattserver.c
  Revised:         
  Revision:        

  Description:    GAP Attribute Server


**************************************************************************************************/

/*********************************************************************
 * INCLUDES
 */
#include "sdk_config.h"
#include "bcomdef.h"
#include "OSAL.h"
#include "gap.h"
#include "gapgattserver.h"
#include "att.h"
#include "gatt.h"
#include "gatt_uuid.h"
#include "gattservapp.h"

/*********************************************************************
 * MACROS
 */

/*********************************************************************
 * CONSTANTS
 */
// Position of device name in attribute table
#define GAP_DEVICE_NAME_POS         2
#define GAP_APPEARANCE_POS          4
#define GAP_PRIVACY_FLAG_POS        6

/*********************************************************************
 * TYPEDEFS
 */

/*********************************************************************
 * GLOBAL VARIABLES
 */

/*********************************************************************
 * EXTERNAL VARIABLES
 */

/*********************************************************************
 * EXTERNAL FUNCTIONS
 */

/*********************************************************************
 * LOCAL VARIABLES
 */
static const ggsAppCBs_t *ggs_AppCBs = NULL;

#if defined ( TESTMODES )
  static uint16 paramValue = 0;
#endif

/*********************************************************************
 * Profile Attributes - variables
 */

// GAP Service
static CONST gattAttrType_t gapService = { ATT_BT_UUID_SIZE, gapServiceUUID };

// Device Name Characteristic Properties
static uint8 deviceNameCharProps = GATT_PROP_READ;

// Device Name attribute (0 - 248 octets) - extra octet for null-terminate char
static uint8 deviceName[GAP_DEVICE_NAME_LEN+1] = { 0 };

// Appearance Characteristic Properties
static uint8 appearanceCharProps = GATT_PROP_READ;

// Appearance attribute (2-octet enumerated value as defined by Bluetooth Assigned Numbers document)
static uint16 appearance = GAP_APPEARE_UNKNOWN;

#if ( HOST_CONFIG & PERIPHERAL_CFG )

#if defined (GAP_PRIVACY) || defined (GAP_PRIVACY_RECONNECT)

// Peripheral Privacy Flag Characteristic Properties
static uint8 periPrivacyFlagCharProps = GATT_PROP_READ;

// Peripheral Privacy Flag attribute (1 octet)
static uint8 periPrivacyFlag = GAP_PRIVACY_DISABLED;

#endif // GAP_PRIVACY || GAP_PRIVACY_RECONNECT

#if defined (GAP_PRIVACY_RECONNECT)

// Reconnection Address Characteristic Properties
static uint8 reconnectAddrCharProps = GATT_PROP_WRITE;

// Reconnection Address attribute (6 octets)
static uint8 reconnectAddr[B_ADDR_LEN] = { 0x00, 0x00, 0x00, 0x00, 0x00, 0x00 };

#endif // GAP_PRIVACY_RECONNECT

// Peripheral Preferred Connection Parameters Characteristic Properties
static uint8 periConnParamCharProps = GATT_PROP_READ;

// Peripheral Preferred Connection Parameters attribute (8 octets)
static gapPeriConnectParams_t periConnParameters = { 80, 160, 0, 1000 };

#endif // PERIPHERAL_CFG

/*********************************************************************
 * Profile Attributes - Table
 */

// GAP Attribute Table
static gattAttribute_t gapAttrTbl[] =
{
  // Generic Access Profile
  {
    { ATT_BT_UUID_SIZE, primaryServiceUUID }, /* type */
    GATT_PERMIT_READ,                         /* permissions */
    0,                                        /* handle */
    (uint8 *)&gapService                      /* pValue */
  },

    // Characteristic Declaration
    {
      { ATT_BT_UUID_SIZE, characterUUID },
      GATT_PERMIT_READ,
      0,
      &deviceNameCharProps
    },

      // Device Name attribute
      {
        { ATT_BT_UUID_SIZE, deviceNameUUID },
        GATT_PERMIT_READ,
        0,
        deviceName
      },

    // Characteristic Declaration
    {
      { ATT_BT_UUID_SIZE, characterUUID },
      GATT_PERMIT_READ,
      0,
      &appearanceCharProps
    },

      // Icon attribute
      {
        { ATT_BT_UUID_SIZE, appearanceUUID },
        GATT_PERMIT_READ,
        0,
        (uint8 *)&appearance
      },

#if ( HOST_CONFIG & PERIPHERAL_CFG )

#if defined (GAP_PRIVACY) || defined (GAP_PRIVACY_RECONNECT)

    // Characteristic Declaration
    {
      { ATT_BT_UUID_SIZE, characterUUID },
      GATT_PERMIT_READ,
      0,
      &periPrivacyFlagCharProps
    },

      // Peripheral Privacy Flag attribute
      {
        { ATT_BT_UUID_SIZE, periPrivacyFlagUUID },
        GATT_PERMIT_READ,
        0,
        (uint8 *)&periPrivacyFlag
      },

#endif // GAP_PRIVACY || GAP_PRIVACY_RECONNECT

#if defined (GAP_PRIVACY_RECONNECT)

    // Characteristic Declaration
    {
      { ATT_BT_UUID_SIZE, characterUUID },
      GATT_PERMIT_READ,
      0,
      &reconnectAddrCharProps
    },

      // Reconnection Address attribute
      {
        { ATT_BT_UUID_SIZE, reconnectAddrUUID },
        GATT_PERMIT_AUTHEN_WRITE,
        0,
        reconnectAddr
      },

#endif // GAP_PRIVACY_RECONNECT

    // Characteristic Declaration
    {
      { ATT_BT_UUID_SIZE, characterUUID },
      GATT_PERMIT_READ,
      0,
      &periConnParamCharProps
    },

      // Peripheral Preferred Connection Parameters attribute
      {
        { ATT_BT_UUID_SIZE, periConnParamUUID },
        GATT_PERMIT_READ,
        0,
        (uint8 *)&periConnParameters
      },

#endif // PERIPHERAL_CFG
};

/*********************************************************************
 * LOCAL FUNCTIONS
 */
static void ggs_SetAttrWPermit( uint8 wPermit, uint8 *pPermissions, uint8 *pCharProps );

/*********************************************************************
 * PUBLIC FUNCTIONS
 */
// GGS Callback functions
static uint8 ggs_ReadAttrCB( uint16 connHandle, gattAttribute_t *pAttr,
                             uint8 *pValue, uint16 *pLen, uint16 offset, uint8 maxLen );
static bStatus_t ggs_WriteAttrCB( uint16 connHandle, gattAttribute_t *pAttr,
                                  uint8 *pValue, uint16 len, uint16 offset );

/*********************************************************************
 * PROFILE CALLBACKS
 */
// GAP Service Callbacks
CONST gattServiceCBs_t gapServiceCBs =
{
  ggs_ReadAttrCB,  // Read callback function pointer
  ggs_WriteAttrCB, // Write callback function pointer
  NULL             // Authorization callback function pointer
};

/*********************************************************************
 * @fn      GGS_SetParameter
 *
 * @brief   Set a GAP GATT Server parameter.
 *
 * @param   param - Profile parameter ID
 * @param   len - length of data to right
 * @param   value - pointer to data to write.  This is dependent on
 *          the parameter ID and WILL be cast to the appropriate
 *          data type (example: data type of uint16 will be cast to
 *          uint16 pointer).
 *
 * @return  bStatus_t
 */
bStatus_t GGS_SetParameter( uint8 param, uint8 len, void *value )
{
  bStatus_t ret = SUCCESS;

  switch ( param )
  {
    case GGS_DEVICE_NAME_ATT:
      // Always leave room for null-terminate char
      if ( len <= GAP_DEVICE_NAME_LEN )
      {
        VOID osal_memset( deviceName, 0, GAP_DEVICE_NAME_LEN+1 );
        VOID osal_memcpy( deviceName, value, len );
      }
      else
      {
        ret = bleInvalidRange;
      }
      break;

    case GGS_APPEARANCE_ATT:
      if ( len == sizeof ( uint16 ) )
      {
        appearance = *((uint16*)value);
      }
      else
      {
        ret = bleInvalidRange;
      }
      break;

#if ( HOST_CONFIG & PERIPHERAL_CFG )

#if defined (GAP_PRIVACY) || defined (GAP_PRIVACY_RECONNECT)
    case GGS_PERI_PRIVACY_FLAG_ATT:
      if ( len == sizeof ( uint8 ) )
      {
        periPrivacyFlag = *((uint8*)value);
      }
      else
      {
        ret = bleInvalidRange;
      }
      break;

    case GGS_PERI_PRIVACY_FLAG_PROPS:
      if ( len == sizeof ( uint8 ) )
      {
        periPrivacyFlagCharProps = *((uint8*)value);
      }
      else
      {
        ret = bleInvalidRange;
      }
      break;

    case GGS_W_PERMIT_PRIVACY_FLAG_ATT:
      if ( len == sizeof ( uint8 ) )
      {
        uint8 wPermit = *(uint8 *)value;
        
        // Optionally Writeable with Authentication 
        if ( !gattPermitWrite( wPermit ) )
        {
          ggs_SetAttrWPermit( wPermit,
                              &(gapAttrTbl[GAP_PRIVACY_FLAG_POS].permissions),
                              gapAttrTbl[GAP_PRIVACY_FLAG_POS-1].pValue );
        }
        else
        {
          ret = bleInvalidRange;
        }
      }
      else
      {
        ret = bleInvalidRange;
      }
      break;
#endif // GAP_PRIVACY || GAP_PRIVACY_RECONNECT

#if defined (GAP_PRIVACY_RECONNECT)
    case GGS_RECONNCT_ADDR_ATT:
      if ( len == B_ADDR_LEN )
      {
        VOID osal_memcpy( reconnectAddr, value, len );
      }
      else
      {
        ret = bleInvalidRange;
      }
      break;
#endif // GAP_PRIVACY_RECONNECT

    case GGS_PERI_CONN_PARAM_ATT:
      if ( len == sizeof(gapPeriConnectParams_t) )
      {
        periConnParameters = *((gapPeriConnectParams_t *)(value));
      }
      else
      {
        ret = bleInvalidRange;
      }
      break;
#endif // PERIPHERAL_CFG

    case GGS_W_PERMIT_DEVICE_NAME_ATT:
      if ( len == sizeof ( uint8 ) )
      {
        // Optionally Writeable
        ggs_SetAttrWPermit( *(uint8 *)value,
                            &(gapAttrTbl[GAP_DEVICE_NAME_POS].permissions),
                            gapAttrTbl[GAP_DEVICE_NAME_POS-1].pValue );
      }
      else
      {
        ret = bleInvalidRange;
      }
      break;

    case GGS_W_PERMIT_APPEARANCE_ATT:
      if ( len == sizeof ( uint8 ) )
      {
        // Optionally Writeable
        ggs_SetAttrWPermit( *(uint8 *)value,
                            &(gapAttrTbl[GAP_APPEARANCE_POS].permissions),
                            gapAttrTbl[GAP_APPEARANCE_POS-1].pValue );
      }
      else
      {
        ret = bleInvalidRange;
      }
      break;

    default:
      ret = INVALIDPARAMETER;
      break;
  }

  return ( ret );
}

/*********************************************************************
 * @fn      GGS_GetParameter
 *
 * @brief   Get a GAP GATT Server parameter.
 *
 * @param   param - Profile parameter ID
 * @param   value - pointer to data to put.  This is dependent on
 *          the parameter ID and WILL be cast to the appropriate
 *          data type (example: data type of uint16 will be cast to
 *          uint16 pointer).
 *
 * @return  bStatus_t
 */
bStatus_t GGS_GetParameter( uint8 param, void *value )
{
  bStatus_t ret = SUCCESS;

  switch ( param )
  {
    case GGS_DEVICE_NAME_ATT:
      VOID osal_memcpy( value, deviceName, GAP_DEVICE_NAME_LEN );
      break;

    case GGS_APPEARANCE_ATT:
      *((uint16*)value) = appearance;
      break;

#if ( HOST_CONFIG & PERIPHERAL_CFG )

#if defined (GAP_PRIVACY) || defined (GAP_PRIVACY_RECONNECT)
    case GGS_PERI_PRIVACY_FLAG_ATT:
      *((uint8*)value) = periPrivacyFlag;
      break;

    case GGS_PERI_PRIVACY_FLAG_PROPS:
      *((uint8*)value) = periPrivacyFlagCharProps;
      break;
#endif // GAP_PRIVACY || GAP_PRIVACY_RECONNECT

#if defined (GAP_PRIVACY_RECONNECT)
    case GGS_RECONNCT_ADDR_ATT:
      VOID osal_memcpy( value, reconnectAddr, B_ADDR_LEN );
      break;
#endif // GAP_PRIVACY_RECONNECT

    case GGS_PERI_CONN_PARAM_ATT:
      *((gapPeriConnectParams_t *)(value)) = periConnParameters;
      break;
#endif // PERIPHERAL_CFG

    default:
      ret = INVALIDPARAMETER;
      break;
  }

  return ( ret );
}

/*********************************************************************
 * @fn      GGS_SetParamValue
 *
 * @brief   Set a GGS Parameter value. Use this function to change
 *          the default GGS parameter values.
 *
 * @param   value - new GGS param value
 *
 * @return  void
 */
void GGS_SetParamValue( uint16 value )
{
#if defined ( TESTMODES )
  uint8 wpermit;

  paramValue = value;
  switch ( value )
  {
    case GGS_TESTMODE_OFF:
      wpermit = 0;
      VOID GGS_SetParameter( GGS_W_PERMIT_DEVICE_NAME_ATT, sizeof( uint8 ), (void*)&wpermit );
      VOID GGS_SetParameter( GGS_W_PERMIT_APPEARANCE_ATT, sizeof( uint8 ), (void*)&wpermit );
      VOID GGS_SetParameter( GGS_W_PERMIT_PRIVACY_FLAG_ATT, sizeof( uint8 ), (void*)&wpermit );
      break;

    case GGS_TESTMODE_W_PERMIT_DEVICE_NAME:
      wpermit = GATT_PERMIT_WRITE;
      VOID GGS_SetParameter( GGS_W_PERMIT_DEVICE_NAME_ATT, sizeof( uint8 ), (void*)&wpermit );
      break;

    case GGS_TESTMODE_W_PERMIT_APPEARANCE:
      wpermit = GATT_PERMIT_WRITE;
      VOID GGS_SetParameter( GGS_W_PERMIT_APPEARANCE_ATT, sizeof( uint8 ), (void*)&wpermit );
      break;

    case GGS_TESTMODE_W_PERMIT_PRIVACY_FLAG:
      wpermit = GATT_PERMIT_AUTHEN_WRITE;
      VOID GGS_SetParameter( GGS_W_PERMIT_PRIVACY_FLAG_ATT, sizeof( uint8 ), (void*)&wpermit );
      break;
      
    default:
      break;
  }
#else
  VOID value;
#endif
}

/*********************************************************************
 * @fn      GGS_GetParamValue
 *
 * @brief   Get a GGS Parameter value.
 *
 * @param   none
 *
 * @return  GGS Parameter value
 */
uint16 GGS_GetParamValue( void )
{
#if defined ( TESTMODES )
  return ( paramValue );
#else
  return ( 0 );
#endif
}

/*********************************************************************
 * LOCAL FUNCTION PROTOTYPES
 */

/*********************************************************************
 * @fn      GGS_AddService
 *
 * @brief   Add function for the GAP GATT Service.
 *
 * @param   services - services to add. This is a bit map and can
 *                     contain more than one service.
 *
 * @return  SUCCESS: Service added successfully.
 *          INVALIDPARAMETER: Invalid service field.
 *          FAILURE: Not enough attribute handles available.
 *          bleMemAllocError: Memory allocation error occurred.
 */
bStatus_t GGS_AddService( uint32 services )
{
  uint8 status = SUCCESS;

  if ( services & GAP_SERVICE )
  {
    // Register GAP attribute list and CBs with GATT Server Server App
    status = GATTServApp_RegisterService( gapAttrTbl, GATT_NUM_ATTRS( gapAttrTbl ),
                                          &gapServiceCBs );
  }

  return ( status );
}

/******************************************************************************
 * @fn      GATTServApp_DelService
 *
 * @brief   Delete function for the GAP GATT Service.
 *
 * @param   services - services to delete. This is a bit map and can
 *                     contain more than one service.
 *
 * @return  SUCCESS: Service deleted successfully.
 *          FAILURE: Service not found.
 */
bStatus_t GGS_DelService( uint32 services )
{
  uint8 status = SUCCESS;

  if ( services & GAP_SERVICE )
  {
    // Deregister GAP attribute list and CBs from GATT Server Application
    status = GATTServApp_DeregisterService( GATT_SERVICE_HANDLE( gapAttrTbl ), NULL );
  }

  return ( status );
}

/*********************************************************************
 * @fn      GGS_RegisterAppCBs
 *
 * @brief   Registers the application callback function.
 *
 *          Note: Callback registration is needed only when the
 *                Device Name is made writable. The application
 *                will be notified when the Device Name is changed
 *                over the air.
 *
 * @param   appCallbacks - pointer to application callbacks.
 *
 * @return  none
 */
void GGS_RegisterAppCBs( ggsAppCBs_t *appCallbacks )
{
  ggs_AppCBs = appCallbacks;
}

/*********************************************************************
 * @fn          ggs_SetAttrWPermit
 *
 * @brief       Update attribute Write access permissions and characteristic
 *              properties for over-the-air write operations.
 *
 * @param       wPermit - write acces permissions
 * @param       pPermissions - pointer to attribute permissions
 * @param       pCharProps - pointer to characteristic properties
*
 * @return      none
 */
static void ggs_SetAttrWPermit( uint8 wPermit, uint8 *pPermissions, uint8 *pCharProps )
{
  // Update attribute Write access permissions
  if ( gattPermitWrite( wPermit ) )
  {
    *pPermissions |= GATT_PERMIT_WRITE;
  }
  else
  {
    *pPermissions &= ~GATT_PERMIT_WRITE;
  }

  if ( gattPermitAuthenWrite( wPermit ) )
  {
    *pPermissions |= GATT_PERMIT_AUTHEN_WRITE;
  }
  else
  {
    *pPermissions &= ~GATT_PERMIT_AUTHEN_WRITE;
  }

  if ( gattPermitAuthorWrite( wPermit ) )
  {
    *pPermissions |= GATT_PERMIT_AUTHOR_WRITE;
  }
  else
  {
    *pPermissions &= ~GATT_PERMIT_AUTHOR_WRITE;
  }

  // Update attribute Write characteristic properties
  if ( gattPermitWrite( wPermit )       ||
       gattPermitAuthenWrite( wPermit ) ||
       gattPermitAuthorWrite( wPermit ) )
  {
    *pCharProps |= (GATT_PROP_WRITE_NO_RSP | GATT_PROP_WRITE);
  }
  else if ( wPermit == 0 )
  {
    // Attribute not Writable
    *pCharProps &= ~(GATT_PROP_WRITE_NO_RSP | GATT_PROP_WRITE);
  }
}

/*********************************************************************
 * @fn          ggs_ReadAttrCB
 *
 * @brief       Read an attribute.
 *
 * @param       connHandle - connection message was received on
 * @param       pAttr - pointer to attribute
 * @param       pValue - pointer to data to be read
 * @param       pLen - length of data to be read
 * @param       offset - offset of the first octet to be read
 * @param       maxLen - maximum length of data to be read
 *
 * @return      Success or Failure
 */
static uint8 ggs_ReadAttrCB( uint16 connHandle, gattAttribute_t *pAttr,
                             uint8 *pValue, uint16 *pLen, uint16 offset, uint8 maxLen )
{
  uint16 uuid;
  bStatus_t status = SUCCESS;

  VOID connHandle; // Not needed for now!

  // Make sure it's not a blob operation
  if ( offset > 0 )
  {
    return ( ATT_ERR_ATTR_NOT_LONG );
  }

  if ( pAttr->type.len == ATT_BT_UUID_SIZE )
  {
    // 16-bit UUID
    uuid = BUILD_UINT16( pAttr->type.uuid[0], pAttr->type.uuid[1]);
    switch ( uuid )
    {
      case DEVICE_NAME_UUID:
        {
          uint8 len = osal_strlen( (char *)(pAttr->pValue) );

          // If the attribute value is longer than maxLen then maxLen
          // octets shall be included in this response.
          if ( len > maxLen )
          {
            len = maxLen;
          }

          *pLen = len;
          VOID osal_memcpy( pValue, pAttr->pValue, len );
        }
        break;

      case APPEARANCE_UUID:
        {
          uint16 value = *((uint16 *)(pAttr->pValue));

          *pLen = 2;
          pValue[0] = LO_UINT16( value );
          pValue[1] = HI_UINT16( value );
        }
        break;

      case RECONNECT_ADDR_UUID:
        *pLen = B_ADDR_LEN;
        VOID osal_memcpy( pValue, pAttr->pValue, B_ADDR_LEN );
        break;

      case PERI_PRIVACY_FLAG_UUID:
        *pLen = 1;
        *pValue = *pAttr->pValue;
        break;

      case PERI_CONN_PARAM_UUID:
        if ( pAttr->pValue != NULL )
        {
          gapPeriConnectParams_t *pConnectParam = (gapPeriConnectParams_t *)(pAttr->pValue);

          *pLen = 8;
          pValue[0] = LO_UINT16( pConnectParam->intervalMin );
          pValue[1] = HI_UINT16( pConnectParam->intervalMin );

          pValue[2] = LO_UINT16( pConnectParam->intervalMax );
          pValue[3] = HI_UINT16( pConnectParam->intervalMax );

          pValue[4] = LO_UINT16( pConnectParam->latency );
          pValue[5] = HI_UINT16( pConnectParam->latency );

          pValue[6] = LO_UINT16( pConnectParam->timeout );
          pValue[7] = HI_UINT16( pConnectParam->timeout );
        }
        else
        {
          *pLen = 0;
        }
        break;

      default:
        // Should never get here!
        *pLen = 0;
        status = ATT_ERR_INVALID_HANDLE;
        break;
    }
  }
  else
  {
    // 128-bit UUID
    *pLen = 0;
    status = ATT_ERR_INVALID_HANDLE;
  }

  return ( status );
}

/*********************************************************************
 * @fn      ggs_ValidateWriteAttrCB
 *
 * @brief   Validate and Write attribute data
 *
 * @param   connHandle - connection message was received on
 * @param   pAttr - pointer to attribute
 * @param   pValue - pointer to data to be written
 * @param   len - length of data
 * @param   offset - offset of the first octet to be written
 *
 * @return  Success or Failure
 */
static bStatus_t ggs_WriteAttrCB( uint16 connHandle, gattAttribute_t *pAttr,
                                  uint8 *pValue, uint16 len, uint16 offset )
{
  bStatus_t status = SUCCESS;

  VOID connHandle; // Not needed for now!

  if ( pAttr->type.len == ATT_BT_UUID_SIZE )
  {
    // 16-bit UUID
    uint16 uuid = BUILD_UINT16( pAttr->type.uuid[0], pAttr->type.uuid[1]);
    switch ( uuid )
    {
      case DEVICE_NAME_UUID:
        // Validate the long value
        {
          uint8 curLen = osal_strlen( (char *)(pAttr->pValue) );

          // If the value offset is greater than the current length of the
          // attribute value then an Error Response shall be sent with the
          // error code Invalid Offset.
          if ( offset <= curLen )
          {
            // Always leave room for null-terminate char
            if ( ( offset + len ) > GAP_DEVICE_NAME_LEN )
            {
              // Appliction error
              status = ATT_ERR_INVALID_VALUE_SIZE;
            }
          }
          else
          {
            status = ATT_ERR_INVALID_OFFSET;
          }
        }

        // Write the long value
        if ( status == SUCCESS )
        {
          VOID osal_memcpy( &(pAttr->pValue[offset]), pValue, len );
          offset += len;
          pAttr->pValue[offset] = '\0';

          // Notify application
          if ( ggs_AppCBs && ggs_AppCBs->pfnAttrValueChange )
          {
            ggs_AppCBs->pfnAttrValueChange( GGS_DEVICE_NAME_ID );
          }
        }
        break;

      case APPEARANCE_UUID:
        // Validate the value
        if ( offset == 0 )
        {
          if ( len != 2 )
          {
            status = ATT_ERR_INVALID_VALUE_SIZE;
          }
        }
        else
        {
          status = ATT_ERR_ATTR_NOT_LONG;
        }

        // Write the value
        if ( status == SUCCESS )
        {
          uint16 *pCurValue = (uint16 *)pAttr->pValue;

          *pCurValue = BUILD_UINT16( pValue[0], pValue[1] );

          // Notify application
          if ( ggs_AppCBs && ggs_AppCBs->pfnAttrValueChange )
          {
            ggs_AppCBs->pfnAttrValueChange( GGS_APPEARANCE_ID );
          }
        }
        break;

      case RECONNECT_ADDR_UUID:
        // Validate the value - writable by a bonded device
#if ( HOST_CONFIG & PERIPHERAL_CFG )

#if defined (GAP_PRIVACY) || defined (GAP_PRIVACY_RECONNECT)
        if ( periPrivacyFlag == GAP_PRIVACY_DISABLED )
        {
          status = ATT_ERR_WRITE_NOT_PERMITTED;
        }
        else
#endif // GAP_PRIVACY || GAP_PRIVACY_RECONNECT

#endif // PERIPHERAL_CFG
        if ( offset == 0 )
        {
          if ( len != B_ADDR_LEN )
          {
            status = ATT_ERR_INVALID_VALUE_SIZE;
          }
        }
        else
        {
          status = ATT_ERR_ATTR_NOT_LONG;
        }

        // Write the value
        if ( status == SUCCESS )
        {
          VOID osal_memcpy( pAttr->pValue, pValue, B_ADDR_LEN );
        }
        break;

      case PERI_PRIVACY_FLAG_UUID:
        // Validate the value - writable by a bonded device
#if ( HOST_CONFIG & PERIPHERAL_CFG )

#if defined (GAP_PRIVACY) || defined (GAP_PRIVACY_RECONNECT)
        if ( (periPrivacyFlagCharProps & GATT_PROP_WRITE) == 0 )
        {
          status = ATT_ERR_WRITE_NOT_PERMITTED;
        }
        else
#endif // GAP_PRIVACY || GAP_PRIVACY_RECONNECT

#endif // PERIPHERAL_CFG
        if ( offset == 0 )
        {
          if ( len == 1 )
          {
            // Validate characteristic configuration bit field
            if ( ( *pValue != GAP_PRIVACY_DISABLED ) &&
                 ( *pValue != GAP_PRIVACY_ENABLED ) )
            {
              status = ATT_ERR_INVALID_VALUE;
            }
          }
          else
          {
            status = ATT_ERR_INVALID_VALUE_SIZE;
          }
        }
        else
        {
          status = ATT_ERR_ATTR_NOT_LONG;
        }

        // Write the value
        if ( status == SUCCESS )
        {
          *pAttr->pValue = *pValue;
        }
        break;

      default:
        // Should never get here!
        status = ATT_ERR_INVALID_HANDLE;
    }
  }
  else
  {
    // 128-bit UUID
    status = ATT_ERR_INVALID_HANDLE;
  }

  return ( status );
}

/*********************************************************************
*********************************************************************/