ble-light/lib/multi_include/gatt.h

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/**
  @headerfile:       gatt.h
  $Date: 
  $Revision: 

  @mainpage BLE GATT API

  Description:    This file contains Generic Attribute Profile (GATT)
                  definitions and prototypes.<BR><BR>


*/

#ifndef GATT_H
#define GATT_H

#ifdef __cplusplus
extern "C"
{
#endif

/*********************************************************************
 * INCLUDES
 */
#include "bcomdef.h"
#include "OSAL.h"

#include "att.h"

/*********************************************************************
 * CONSTANTS
 */
 
/** @defgroup GATT_PERMIT_BITMAPS_DEFINES GATT Attribute Access Permissions Bit Fields
 * @{
 */

#define GATT_PERMIT_READ                 0x01 //!< Attribute is Readable
#define GATT_PERMIT_WRITE                0x02 //!< Attribute is Writable
#define GATT_PERMIT_AUTHEN_READ          0x04 //!< Read requires Authentication
#define GATT_PERMIT_AUTHEN_WRITE         0x08 //!< Write requires Authentication
#define GATT_PERMIT_AUTHOR_READ          0x10 //!< Read requires Authorization
#define GATT_PERMIT_AUTHOR_WRITE         0x20 //!< Write requires Authorization
#define GATT_PERMIT_ENCRYPT_READ         0x40 //!< Read requires Encryption
#define GATT_PERMIT_ENCRYPT_WRITE        0x80 //!< Write requires Encryption
  
/** @} End GATT_PERMIT_BITMAPS_DEFINES */


/** @defgroup GATT_NUM_PREPARE_WRITES_DEFINES GATT Maximum Number of Prepare Writes
 * @{
 */
#define PREPARE_QUEUE_STATIC
#if !defined( GATT_MAX_NUM_PREPARE_WRITES )
  #define GATT_MAX_NUM_PREPARE_WRITES      1 //!< GATT Maximum number of attributes that Attribute Server can prepare for writing per Attribute Client
#endif

/** @} End GATT_NUM_PREPARE_WRITES_DEFINES */


/** @defgroup GATT_ENCRYPT_KEY_SIZE_DEFINES GATT Encryption Key Size
 * @{
 */

#define GATT_ENCRYPT_KEY_SIZE            16 //!< GATT Encryption Key Size used for encrypting a link

/** @} End GATT_ENCRYPT_KEY_SIZE_DEFINES */


/** @defgroup GATT_MAX_ATTR_SIZE_DEFINES GATT Maximum Attribute Value Length
 * @{
 */

#define GATT_MAX_ATTR_SIZE               512 //!< GATT Maximum length of an attribute value

/** @} End GATT_MAX_ATTR_SIZE_DEFINES */

// GATT Maximum number of connections (including loopback)
#define GATT_MAX_NUM_CONN                ( MAX_NUM_LL_CONN + 1 )

 // GATT Base Method
#define GATT_BASE_METHOD                 0x40

// Attribute handle defintions
#define GATT_INVALID_HANDLE              0x0000 // Invalid attribute handle
#define GATT_MIN_HANDLE                  0x0001 // Minimum attribute handle
#define GATT_MAX_HANDLE                  0xFFFF // Maximum attribute handle

/*********************************************************************
 * VARIABLES
 */

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

// Attribute Access Permissions
#define gattPermitRead( a )              ( (a) & GATT_PERMIT_READ )
#define gattPermitWrite( a )             ( (a) & GATT_PERMIT_WRITE )
#define gattPermitAuthenRead( a )        ( (a) & GATT_PERMIT_AUTHEN_READ )
#define gattPermitAuthenWrite( a )       ( (a) & GATT_PERMIT_AUTHEN_WRITE )
#define gattPermitAuthorRead( a )        ( (a) & GATT_PERMIT_AUTHOR_READ )
#define gattPermitAuthorWrite( a )       ( (a) & GATT_PERMIT_AUTHOR_WRITE )
#define gattPermitEncryptRead( a )       ( (a) & GATT_PERMIT_ENCRYPT_READ )
#define gattPermitEncryptWrite( a )      ( (a) & GATT_PERMIT_ENCRYPT_WRITE )

// Check for different UUID types
#define gattPrimaryServiceType( t )      ( ATT_CompareUUID( primaryServiceUUID, ATT_BT_UUID_SIZE, \
                                                            (t).uuid, (t).len ) )
#define gattSecondaryServiceType( t )    ( ATT_CompareUUID( secondaryServiceUUID, ATT_BT_UUID_SIZE, \
                                                            (t).uuid, (t).len ) )
#define gattCharacterType( t )           ( ATT_CompareUUID( characterUUID, ATT_BT_UUID_SIZE, \
                                                            (t).uuid, (t).len ) )
#define gattIncludeType( t )             ( ATT_CompareUUID( includeUUID, ATT_BT_UUID_SIZE, \
                                                            (t).uuid, (t).len ) )
#define gattServiceType( t )             ( gattPrimaryServiceType( (t) ) || \
                                           gattSecondaryServiceType( (t) ) )

/*********************************************************************
 * TYPEDEFS
 */
  
/**
 * GATT Read By Type Request format.
 */
typedef struct
{
  uint8 discCharsByUUID;  //!< Whether this is a GATT Discover Characteristics by UUID sub-procedure
  attReadByTypeReq_t req; //!< Read By Type Request
} gattReadByTypeReq_t;

/**
 * GATT Prepare Write Request format.
 */
typedef struct
{
  uint16 handle; //!< Handle of the attribute to be written (must be first field)
  uint16 offset; //!< Offset of the first octet to be written
  uint8 len;     //!< Length of value
  uint8 *pValue; //!< Part of the value of the attribute to be written (must be allocated)
} gattPrepareWriteReq_t;

/**
 * GATT Write Long Request format. Do not change the order of the members.
 */
typedef struct
{
  uint8 reliable;            //!< Whether reliable writes requested (always FALSE for Write Long)
  gattPrepareWriteReq_t req; //!< GATT Prepare Write Request
  uint16 lastOffset;         //!< Offset of last Prepare Write Request sent
} gattWriteLongReq_t;

/**
 * GATT Reliable Writes Request format. Do not change the order of the members.
 */
typedef struct
{
  uint8 reliable;              //!< Whether reliable writes requested (always TRUE for Reliable Writes)
  attPrepareWriteReq_t *pReqs; //!< Arrary of Prepare Write Requests (must be allocated)
  uint8 numReqs;               //!< Number of Prepare Write Requests
  uint8 index;                 //!< Index of last Prepare Write Request sent
  uint8 flags;                 //!< 0x00 - cancel all prepared writes.
                               //!< 0x01 - immediately write all pending prepared values.
} gattReliableWritesReq_t;

/**
 * GATT Message format. It's a union of all attribute protocol/profile messages
 * used between the attribute protocol/profile and upper layer application.
 */
typedef union
{
  // Request messages
  attExchangeMTUReq_t exchangeMTUReq;              //!< ATT Exchange MTU Request
  attFindInfoReq_t findInfoReq;                    //!< ATT Find Information Request
  attFindByTypeValueReq_t findByTypeValueReq;      //!< ATT Find By Type Vaue Request
  attReadByTypeReq_t readByTypeReq;                //!< ATT Read By Type Request
  attReadReq_t readReq;                            //!< ATT Read Request
  attReadBlobReq_t readBlobReq;                    //!< ATT Read Blob Request
  attReadMultiReq_t readMultiReq;                  //!< ATT Read Multiple Request
  attReadByGrpTypeReq_t readByGrpTypeReq;          //!< ATT Read By Group Type Request
  attWriteReq_t writeReq;                          //!< ATT Write Request
  attPrepareWriteReq_t prepareWriteReq;            //!< ATT Prepare Write Request
  attExecuteWriteReq_t executeWriteReq;            //!< ATT Execute Write Request
  gattReadByTypeReq_t gattReadByTypeReq;           //!< GATT Read By Type Request
  gattWriteLongReq_t gattWriteLongReq;             //!< GATT Long Write Request
  gattReliableWritesReq_t gattReliableWritesReq;   //!< GATT Reliable Writes Request

  // Response messages
  attErrorRsp_t errorRsp;                          //!< ATT Error Response
  attExchangeMTURsp_t exchangeMTURsp;              //!< ATT Exchange MTU Response
  attFindInfoRsp_t findInfoRsp;                    //!< ATT Find Information Response
  attFindByTypeValueRsp_t findByTypeValueRsp;      //!< ATT Find By Type Vaue Response
  attReadByTypeRsp_t readByTypeRsp;                //!< ATT Read By Type Response
  attReadRsp_t readRsp;                            //!< ATT Read Response
  attReadBlobRsp_t readBlobRsp;                    //!< ATT Read Blob Response
  attReadMultiRsp_t readMultiRsp;                  //!< ATT Read Multiple Response
  attReadByGrpTypeRsp_t readByGrpTypeRsp;          //!< ATT Read By Group Type Response
  attPrepareWriteRsp_t prepareWriteRsp;            //!< ATT Prepare Write Response

  // Indication and Notification messages
  attHandleValueNoti_t handleValueNoti;            //!< ATT Handle Value Notification
  attHandleValueInd_t handleValueInd;              //!< ATT Handle Value Indication
} gattMsg_t;

/**
 * GATT OSAL GATT_MSG_EVENT message format. This message is used to forward an
 * incoming attribute protocol/profile message up to upper layer application.
 */
typedef struct
{
  osal_event_hdr_t hdr; //!< GATT_MSG_EVENT and status
  uint16 connHandle;    //!< Connection message was received on
  uint8 method;         //!< Type of message
  gattMsg_t msg;        //!< Attribute protocol/profile message
} gattMsgEvent_t;

/**
 * GATT Attribute Type format.
 */
typedef struct
{
  uint8 len;         //!< Length of UUID
  const uint8 *uuid; //!< Pointer to UUID
} gattAttrType_t;

/**
 * GATT Attribute format.
 */
typedef struct attAttribute_t
{
  gattAttrType_t type; //!< Attribute type (2 or 16 octet UUIDs)
  uint8 permissions;   //!< Attribute permissions
  uint16 handle;       //!< Attribute handle - assigned internally by attribute server
  uint8* const pValue; //!< Attribute value - encoding of the octet array is defined in 
                       //!< the applicable profile. The maximum length of an attribute 
                       //!< value shall be 512 octets.
} gattAttribute_t;

/**
 * GATT Service format.
 */
typedef struct
{
  uint16 numAttrs; //!< Number of attributes in attrs

  /** Array of attribute records. 
   *  NOTE: The list must start with a Service attribute followed by
   *        all attributes associated with this Service attribute. 
   */
  gattAttribute_t *attrs;
} gattService_t;

/*********************************************************************
 * VARIABLES
 */

/*********************************************************************
 * API FUNCTIONS
 */

/*-------------------------------------------------------------------
 * GATT Client Public APIs
 */

/**
 * @defgroup GATT_CLIENT_API GATT Client API Functions
 * 
 * @{
 */

/**
 * @brief   Initialize the Generic Attribute Profile Client.
 *
 * @return  SUCCESS
 */
extern bStatus_t GATT_InitClient( void );

/**
 * @brief   Register to receive incoming ATT Indications or Notifications
 *          of attribute values.
 *
 * @param   taskId – task to forward indications or notifications to
 *
 * @return  void
 */
extern void GATT_RegisterForInd( uint8 taskId );

/**
 * @brief   The Prepare Write Request is used to request the server to
 *          prepare to write the value of an attribute.
 *
 *          Note: This function is needed only for GATT testing.
 *
 * @param   connHandle - connection to use
 * @param   pReq - pointer to request to be sent
 * @param   taskId - task to be notified of response
 *
 * @return  SUCCESS: Request was sent successfully.<BR>
 *          INVALIDPARAMETER: Invalid connection handle or request field.<BR>
 *          MSG_BUFFER_NOT_AVAIL: No HCI buffer is available.<BR>
 *          bleNotConnected: Connection is down.<BR>
 *          blePending: A response is pending with this server.<BR>
 *          bleMemAllocError: Memory allocation error occurred.<BR>
 *          bleTimeout: Previous transaction timed out.<BR>
 */
extern bStatus_t GATT_PrepareWriteReq( uint16 connHandle, attPrepareWriteReq_t *pReq, uint8 taskId );

/**
 * @brief   The Execute Write Request is used to request the server to
 *          write or cancel the write of all the prepared values currently
 *          held in the prepare queue from this client.
 *
 *          Note: This function is needed only for GATT testing.
 *
 * @param   connHandle - connection to use
 * @param   pReq - pointer to request to be sent
 * @param   taskId - task to be notified of response
 *
 * @return  SUCCESS: Request was sent successfully.<BR>
 *          INVALIDPARAMETER: Invalid connection handle or request field.<BR>
 *          MSG_BUFFER_NOT_AVAIL: No HCI buffer is available.<BR>
 *          bleNotConnected: Connection is down.<BR>
 *          blePending: A response is pending with this server.<BR>
 *          bleMemAllocError: Memory allocation error occurred.<BR>
 *          bleTimeout: Previous transaction timed out.<BR>
 */
extern bStatus_t GATT_ExecuteWriteReq( uint16 connHandle, attExecuteWriteReq_t *pReq, uint8 taskId );

/**
 * @}
 */

/*-------------------------------------------------------------------
 * GATT Server Public APIs
 */

/**
 * @defgroup GATT_SERVER_API GATT Server API Functions
 * 
 * @{
 */

/**
 * @brief   Initialize the Generic Attribute Profile Server.
 *
 * @return  SUCCESS
 */
extern bStatus_t GATT_InitServer( void );

/**
 * @brief   Register a service attribute list with the GATT Server. A service
 *          is composed of characteristics or references to other services.
 *          Each characteristic contains a value and may contain optional 
 *          information about the value. There are two types of services:
 *          primary service and secondary service.
 *
 *          A service definition begins with a service declaration and ends 
 *          before the next service declaration or the maximum Attribute Handle.
 *
 *          A characteristic definition begins with a characteristic declaration
 *          and ends before the next characteristic or service declaration or 
 *          maximum Attribute Handle.
 *
 *          The attribute server will only keep a pointer to the attribute
 *          list, so the calling application will have to maintain the code
 *          and RAM associated with this list.
 *
 * @param   pService - pointer to service attribute list to be registered
 *
 * @return  SUCCESS: Service registered successfully.<BR>
 *          INVALIDPARAMETER: Invalid service field.<BR>
 *          FAILURE: Not enough attribute handles available.<BR>
 *          bleMemAllocError: Memory allocation error occurred.<BR>
 */
extern bStatus_t GATT_RegisterService( gattService_t *pService );

/**
 * @brief   Deregister a service attribute list with the GATT Server.
 *
 *          NOTE: It's the caller's responsibility to free the service attribute
 *          list returned from this API.
 *
 * @param   handle - handle of service to be deregistered
 * @param   pService - pointer to deregistered service (to be returned)
 *
 * @return  SUCCESS: Service deregistered successfully.<BR>
 *          FAILURE: Service not found.<BR>
 */
extern bStatus_t GATT_DeregisterService( uint16 handle, gattService_t *pService );

/**
 * @brief   Register to receive incoming ATT Requests.
 *
 * @param   taskId – task to forward requests to
 *
 * @return  void
 */
extern void GATT_RegisterForReq( uint8 taskId );

/**
 * @brief   Verify the permissions of an attribute for reading.
 *
 * @param   connHandle - connection to use
 * @param   permissions - attribute permissions
 *
 * @return  SUCCESS: Attribute can be read.<BR>
 *          ATT_ERR_READ_NOT_PERMITTED: Attribute cannot be read.<BR>
 *          ATT_ERR_INSUFFICIENT_AUTHEN: Attribute requires authentication.<BR>
 *          ATT_ERR_INSUFFICIENT_KEY_SIZE: Key Size used for encrypting is insufficient.<BR>
 *          ATT_ERR_INSUFFICIENT_ENCRYPT: Attribute requires encryption.<BR>
 */
extern bStatus_t GATT_VerifyReadPermissions( uint16 connHandle, uint8 permissions );

/**
 * @brief   Verify the permissions of an attribute for writing.
 *
 * @param   connHandle - connection to use
 * @param   permissions - attribute permissions
 * @param   pReq - pointer to write request
 *
 * @return  SUCCESS: Attribute can be written.<BR>
 *          ATT_ERR_READ_NOT_PERMITTED: Attribute cannot be written.<BR>
 *          ATT_ERR_INSUFFICIENT_AUTHEN: Attribute requires authentication.<BR>
 *          ATT_ERR_INSUFFICIENT_KEY_SIZE: Key Size used for encrypting is insufficient.<BR>
 *          ATT_ERR_INSUFFICIENT_ENCRYPT: Attribute requires encryption.<BR>
 */
extern bStatus_t GATT_VerifyWritePermissions( uint16 connHandle, uint8 permissions, attWriteReq_t *pReq );

/**
 * @brief   Send out a Service Changed Indication.
 *
 * @param   connHandle - connection to use
 * @param   taskId - task to be notified of confirmation
 *
 * @return  SUCCESS: Indication was sent successfully.<BR>
 *          FAILURE: Service Changed attribute not found.<BR>
 *          INVALIDPARAMETER: Invalid connection handle or request field.<BR>
 *          MSG_BUFFER_NOT_AVAIL: No HCI buffer is available.<BR>
 *          bleNotConnected: Connection is down.<BR>
 *          blePending: A confirmation is pending with this client.<BR>
 */
extern uint8 GATT_ServiceChangedInd( uint16 connHandle, uint8 taskId );

/**
 * @brief   Find the attribute record for a given handle and UUID.
 *
 * @param   startHandle - first handle to look for
 * @param   endHandle - last handle to look for
 * @param   pUUID - pointer to UUID to look for
 * @param   len - length of UUID
 * @param   pHandle - handle of owner of attribute (to be returned)
 * 
 * @return  Pointer to attribute record. NULL, otherwise.
 */
extern gattAttribute_t *GATT_FindHandleUUID( uint16 startHandle, uint16 endHandle, const uint8 *pUUID,
                                             uint16 len, uint16 *pHandle );
/**
 * @brief   Find the attribute record for a given handle
 *
 * @param   handle - handle to look for
 * @param   pHandle - handle of owner of attribute (to be returned)
 * 
 * @return  Pointer to attribute record. NULL, otherwise.
 */
extern gattAttribute_t *GATT_FindHandle( uint16 handle, uint16 *pHandle );

/**
 * @brief   Find the next attribute of the same type for a given attribute.
 *
 * @param   pAttr - pointer to attribute to find a next for
 * @param   endHandle - last handle to look for
 * @param   service - handle of owner service
 * @param   pLastHandle - handle of last attribute (to be returned)
 * 
 * @return  Pointer to next attribute record. NULL, otherwise.
 */
extern gattAttribute_t *GATT_FindNextAttr( gattAttribute_t *pAttr, uint16 endHandle,
                                           uint16 service, uint16 *pLastHandle );
/**
 * @brief   Get the number of attributes for a given service
 *
 * @param   handle - service handle to look for
 * 
 * @return  Number of attributes. 0, otherwise.
 */
extern uint16 GATT_ServiceNumAttrs( uint16 handle );

/**
 * @}
 */

/*-------------------------------------------------------------------
 * GATT Server Sub-Procedure APIs
 */

/**
 * @defgroup GATT_SERVER_SUB_PROCEDURE_API GATT Server Sub-Procedure API Functions
 * 
 * @{
 */

/**
 * @brief   This sub-procedure is used when a server is configured to 
 *          indicate a characteristic value to a client and expects an
 *          attribute protocol layer acknowledgement that the indication
 *          was successfully received.
 *
 *          The ATT Handle Value Indication is used in this sub-procedure.
 *
 *          If the return status from this function is SUCCESS, the calling
 *          application task will receive an OSAL GATT_MSG_EVENT message.
 *          The type of the message will be ATT_HANDLE_VALUE_CFM.
 *
 *          Note: This sub-procedure is complete when ATT_HANDLE_VALUE_CFM
 *                (with SUCCESS or bleTimeout status) is received by the 
 *                calling application task.
 *
 * @param   connHandle - connection to use
 * @param   pInd - pointer to indication to be sent
 * @param   authenticated - whether an authenticated link is required
 * @param   taskId - task to be notified of response
 *
 * @return  SUCCESS: Indication was sent successfully.<BR>
 *          INVALIDPARAMETER: Invalid connection handle or request field.<BR>
 *          MSG_BUFFER_NOT_AVAIL: No HCI buffer is available.<BR>
 *          bleNotConnected: Connection is down.<BR>
 *          blePending: A confirmation is pending with this client.<BR>
 *          bleMemAllocError: Memory allocation error occurred.<BR>
 *          bleTimeout: Previous transaction timed out.<BR>
 */
extern bStatus_t GATT_Indication( uint16 connHandle, attHandleValueInd_t *pInd, 
                                  uint8 authenticated, uint8 taskId );
/**
 * @brief   This sub-procedure is used when a server is configured to 
 *          notify a characteristic value to a client without expecting
 *          any attribute protocol layer acknowledgement that the 
 *          notification was successfully received.
 *
 *          The ATT Handle Value Notification is used in this sub-procedure.
 *
 *          Note: A notification may be sent at any time and does not
 *          invoke a confirmation.
 *
 *          No confirmation will be sent to the calling application task for
 *          this sub-procedure.
 *
 * @param   connHandle - connection to use
 * @param   pNoti - pointer to notification to be sent
 * @param   authenticated - whether an authenticated link is required
 *
 * @return  SUCCESS: Notification was sent successfully.<BR>
 *          INVALIDPARAMETER: Invalid connection handle or request field.<BR>
 *          MSG_BUFFER_NOT_AVAIL: No HCI buffer is available.<BR>
 *          bleNotConnected: Connection is down.<BR>
 *          bleMemAllocError: Memory allocation error occurred.<BR>
 *          bleTimeout: Previous transaction timed out.<BR>
 */
extern bStatus_t GATT_Notification( uint16 connHandle, attHandleValueNoti_t *pNoti,
                                    uint8 authenticated );
/**
 * @}
 */

/*-------------------------------------------------------------------
 * GATT Client Sub-Procedure APIs
 */

/**
 * @defgroup GATT_CLIENT_SUB_PROCEDURE_API GATT Client Sub-Procedure API Functions
 * 
 * @{
 */

/**
 * @brief   This sub-procedure is used by the client to set the ATT_MTU
 *          to the maximum possible value that can be supported by both
 *          devices when the client supports a value greater than the
 *          default ATT_MTU for the Attribute Protocol. This sub-procedure
 *          shall only be initiated once during a connection.
 *
 *          The ATT Exchange MTU Request is used by this sub-procedure.
 *
 *          If the return status from this function is SUCCESS, the calling
 *          application task will receive an OSAL GATT_MSG_EVENT message.
 *          The type of the message will be either ATT_EXCHANGE_MTU_RSP or
 *          ATT_ERROR_RSP (if an error occurred on the server).
 *
 *          Note: This sub-procedure is complete when either ATT_EXCHANGE_MTU_RSP
 *                (with SUCCESS or bleTimeout status) or ATT_ERROR_RSP (with
 *                SUCCESS status) is received by the calling application task.
 *
 * @param   connHandle - connection to use
 * @param   pReq - pointer to request to be sent
 * @param   taskId - task to be notified of response
 *
 * @return  SUCCESS: Request was sent successfully.<BR>
 *          INVALIDPARAMETER: Invalid connection handle or request field.<BR>
 *          MSG_BUFFER_NOT_AVAIL: No HCI buffer is available.<BR>
 *          bleNotConnected: Connection is down.<BR>
 *          blePending: A response is pending with this server.<BR>
 *          bleMemAllocError: Memory allocation error occurred.<BR>
 *          bleTimeout: Previous transaction timed out.<BR>
 */
extern bStatus_t GATT_ExchangeMTU( uint16 connHandle, attExchangeMTUReq_t *pReq, uint8 taskId );

/**
 * @brief   This sub-procedure is used by a client to discover all 
 *          the primary services on a server.
 *
 *          The ATT Read By Group Type Request is used with the Attribute
 *          Type parameter set to the UUID for "Primary Service". The
 *          Starting Handle is set to 0x0001 and the Ending Handle is
 *          set to 0xFFFF.
 *
 *          If the return status from this function is SUCCESS, the calling
 *          application task will receive multiple OSAL GATT_MSG_EVENT messages.
 *          The type of the messages will be either ATT_READ_BY_GRP_TYPE_RSP
 *          or ATT_ERROR_RSP (if an error occurred on the server).
 *
 *          Note: This sub-procedure is complete when either ATT_READ_BY_GRP_TYPE_RSP
 *                (with bleProcedureComplete or bleTimeout status) or ATT_ERROR_RSP
 *                (with SUCCESS status) is received by the calling application
 *                task.
 *
 * @param   connHandle - connection to use
 * @param   taskId - task to be notified of response
 *
 * @return  SUCCESS: Request was sent successfully.<BR>
 *          INVALIDPARAMETER: Invalid connection handle or request field.<BR>
 *          MSG_BUFFER_NOT_AVAIL: No HCI buffer is available.<BR>
 *          bleNotConnected: Connection is down.<BR>
 *          blePending: A response is pending with this server.<BR>
 *          bleMemAllocError: Memory allocation error occurred.<BR>
 *          bleTimeout: Previous transaction timed out.<BR>
 */
extern bStatus_t GATT_DiscAllPrimaryServices( uint16 connHandle, uint8 taskId );

/**
 * @brief   This sub-procedure is used by a client to discover a specific
 *          primary service on a server when only the Service UUID is
 *          known. The primary specific service may exist multiple times 
 *          on a server. The primary service being discovered is identified
 *          by the service UUID.
 *
 *          The ATT Find By Type Value Request is used with the Attribute
 *          Type parameter set to the UUID for "Primary Service" and the
 *          Attribute Value set to the 16-bit Bluetooth UUID or 128-bit
 *          UUID for the specific primary service. The Starting Handle shall
 *          be set to 0x0001 and the Ending Handle shall be set to 0xFFFF.
 *
 *          If the return status from this function is SUCCESS, the calling
 *          application task will receive multiple OSAL GATT_MSG_EVENT messages.
 *          The type of the messages will be either ATT_FIND_BY_TYPE_VALUE_RSP
 *          or ATT_ERROR_RSP (if an error occurred on the server).
 *
 *          Note: This sub-procedure is complete when either ATT_FIND_BY_TYPE_VALUE_RSP
 *                (with bleProcedureComplete or bleTimeout status) or ATT_ERROR_RSP
 *                (with SUCCESS status) is received by the calling application task.
 *
 * @param   connHandle - connection to use
 * @param   pValue - pointer to value to look for
 * @param   len - length of value
 * @param   taskId - task to be notified of response
 *
 * @return  SUCCESS: Request was sent successfully.<BR>
 *          INVALIDPARAMETER: Invalid connection handle or request field.<BR>
 *          MSG_BUFFER_NOT_AVAIL: No HCI buffer is available.<BR>
 *          bleNotConnected: Connection is down.<BR>
 *          blePending: A response is pending with this server.<BR>
 *          bleMemAllocError: Memory allocation error occurred.<BR>
 *          bleTimeout: Previous transaction timed out.<BR>
 */
extern bStatus_t GATT_DiscPrimaryServiceByUUID( uint16 connHandle, uint8 *pValue,
                                                uint8 len, uint8 taskId );
/**
 * @brief   This sub-procedure is used by a client to find include
 *          service declarations within a service definition on a 
 *          server. The service specified is identified by the service
 *          handle range.
 *
 *          The ATT Read By Type Request is used with the Attribute
 *          Type parameter set to the UUID for "Included Service". The
 *          Starting Handle is set to starting handle of the specified
 *          service and the Ending Handle is set to the ending handle
 *          of the specified service.
 *
 *          If the return status from this function is SUCCESS, the calling
 *          application task will receive multiple OSAL GATT_MSG_EVENT messages.
 *          The type of the messages will be either ATT_READ_BY_TYPE_RSP
 *          or ATT_ERROR_RSP (if an error occurred on the server).
 *
 *          Note: This sub-procedure is complete when either ATT_READ_BY_TYPE_RSP
 *                (with bleProcedureComplete or bleTimeout status) or ATT_ERROR_RSP
 *                (with SUCCESS status) is received by the calling application task.
 *
 * @param   connHandle - connection to use
 * @param   startHandle - starting handle
 * @param   endHandle - end handle
 * @param   taskId - task to be notified of response
 *
 * @return  SUCCESS: Request was sent successfully.<BR>
 *          INVALIDPARAMETER: Invalid connection handle or request field.<BR>
 *          MSG_BUFFER_NOT_AVAIL: No HCI buffer is available.<BR>
 *          bleNotConnected: Connection is down.<BR>
 *          blePending: A response is pending with this server.<BR>
 *          bleMemAllocError: Memory allocation error occurred.<BR>
 *          bleTimeout: Previous transaction timed out.<BR>
 */
extern bStatus_t GATT_FindIncludedServices( uint16 connHandle, uint16 startHandle,
                                            uint16 endHandle, uint8 taskId );
/**
 * @brief   This sub-procedure is used by a client to find all the 
 *          characteristic declarations within a service definition on
 *          a server when only the service handle range is known. The
 *          service specified is identified by the service handle range.
 *
 *          The ATT Read By Type Request is used with the Attribute Type
 *          parameter set to the UUID for "Characteristic". The Starting
 *          Handle is set to starting handle of the specified service and
 *          the Ending Handle is set to the ending handle of the specified
 *          service.
 *
 *          If the return status from this function is SUCCESS, the calling
 *          application task will receive multiple OSAL GATT_MSG_EVENT messages.
 *          The type of the messages will be either ATT_READ_BY_TYPE_RSP
 *          or ATT_ERROR_RSP (if an error occurred on the server).
 *
 *          Note: This sub-procedure is complete when either ATT_READ_BY_TYPE_RSP
 *                (with bleProcedureComplete or bleTimeout status) or ATT_ERROR_RSP
 *                (with SUCCESS status) is received by the calling application task.
 *
 * @param   connHandle - connection to use
 * @param   startHandle - starting handle
 * @param   endHandle - end handle
 * @param   taskId - task to be notified of response
 *
 * @return  SUCCESS: Request was sent successfully.<BR>
 *          INVALIDPARAMETER: Invalid connection handle or request field.<BR>
 *          MSG_BUFFER_NOT_AVAIL: No HCI buffer is available.<BR>
 *          bleNotConnected: Connection is down.<BR>
 *          blePending: A response is pending with this server.<BR>
 *          bleMemAllocError: Memory allocation error occurred.<BR>
 *          bleTimeout: Previous transaction timed out.<BR>
 */
extern bStatus_t GATT_DiscAllChars( uint16 connHandle, uint16 startHandle,
                                    uint16 endHandle, uint8 taskId );
/**
 * @brief   This sub-procedure is used by a client to discover service 
 *          characteristics on a server when only the service handle 
 *          ranges are known and the characteristic UUID is known. 
 *          The specific service may exist multiple times on a server.
 *          The characteristic being discovered is identified by the 
 *          characteristic UUID.
 *
 *          The ATT Read By Type Request is used with the Attribute Type
 *          is set to the UUID for "Characteristic" and the Starting
 *          Handle and Ending Handle parameters is set to the service
 *          handle range.
 *
 *          If the return status from this function is SUCCESS, the calling
 *          application task will receive multiple OSAL GATT_MSG_EVENT messages.
 *          The type of the messages will be either ATT_READ_BY_TYPE_RSP
 *          or ATT_ERROR_RSP (if an error occurred on the server).
 *
 *          Note: This sub-procedure is complete when either ATT_READ_BY_TYPE_RSP
 *                (with bleProcedureComplete or bleTimeout status) or ATT_ERROR_RSP
 *                (with SUCCESS status) is received by the calling application task.
 *
 * @param   connHandle - connection to use
 * @param   pReq - pointer to request to be sent
 * @param   taskId - task to be notified of response
 *
 * @return  SUCCESS: Request was sent successfully.<BR>
 *          INVALIDPARAMETER: Invalid connection handle or request field.<BR>
 *          MSG_BUFFER_NOT_AVAIL: No HCI buffer is available.<BR>
 *          bleNotConnected: Connection is down.<BR>
 *          blePending: A response is pending with this server.<BR>
 *          bleMemAllocError: Memory allocation error occurred.<BR>
 *          bleTimeout: Previous transaction timed out.<BR>
 */
extern bStatus_t GATT_DiscCharsByUUID( uint16 connHandle, attReadByTypeReq_t *pReq, uint8 taskId );

/**
 * @brief   This sub-procedure is used by a client to find all the 
 *          characteristic descriptor’s Attribute Handles and Attribute
 *          Types within a characteristic definition when only the 
 *          characteristic handle range is known. The characteristic 
 *          specified is identified by the characteristic handle range.
 *
 *          The ATT Find Information Request is used with the Starting
 *          Handle set to starting handle of the specified characteristic
 *          and the Ending Handle set to the ending handle of the specified
 *          characteristic. The UUID Filter parameter is NULL (zero length).
 *
 *          If the return status from this function is SUCCESS, the calling
 *          application task will receive multiple OSAL GATT_MSG_EVENT messages.
 *          The type of the messages will be either ATT_FIND_INFO_RSP or
 *          ATT_ERROR_RSP (if an error occurred on the server).
 *
 *          Note: This sub-procedure is complete when either ATT_FIND_INFO_RSP
 *                (with bleProcedureComplete or bleTimeout status) or ATT_ERROR_RSP
 *                (with SUCCESS status) is received by the calling application task.
 *
 * @param   connHandle - connection to use
 * @param   startHandle - starting handle
 * @param   endHandle - end handle
 * @param   taskId - task to be notified of response
 *
 * @return  SUCCESS: Request was sent successfully.<BR>
 *          INVALIDPARAMETER: Invalid connection handle or request field.<BR>
 *          MSG_BUFFER_NOT_AVAIL: No HCI buffer is available.<BR>
 *          bleNotConnected: Connection is down.<BR>
 *          blePending: A response is pending with this server.<BR>
 *          bleMemAllocError: Memory allocation error occurred.<BR>
 *          bleTimeout: Previous transaction timed out.<BR>
 */
extern bStatus_t GATT_DiscAllCharDescs( uint16 connHandle, uint16 startHandle,
                                        uint16 endHandle, uint8 taskId );
/**
 * @brief   This sub-procedure is used to read a Characteristic Value
 *          from a server when the client knows the Characteristic Value
 *          Handle. The ATT Read Request is used with the Attribute Handle
 *          parameter set to the Characteristic Value Handle. The Read 
 *          Response returns the Characteristic Value in the Attribute
 *          Value parameter.
 *
 *          The Read Response only contains a Characteristic Value that
 *          is less than or equal to (ATT_MTU – 1) octets in length. If 
 *          the Characteristic Value is greater than (ATT_MTU – 1) octets
 *          in length, the Read Long Characteristic Value procedure may
 *          be used if the rest of the Characteristic Value is required.
 *
 *          If the return status from this function is SUCCESS, the calling
 *          application task will receive an OSAL GATT_MSG_EVENT message.
 *          The type of the message will be either ATT_READ_RSP or
 *          ATT_ERROR_RSP (if an error occurred on the server).
 *
 *          Note: This sub-procedure is complete when either ATT_READ_RSP
 *                (with SUCCESS or bleTimeout status) or ATT_ERROR_RSP (with
 *                SUCCESS status) is received by the calling application task.
 *
 * @param   connHandle - connection to use
 * @param   pReq - pointer to request to be sent
 * @param   taskId - task to be notified of response
 *
 * @return  SUCCESS: Request was sent successfully.<BR>
 *          INVALIDPARAMETER: Invalid connection handle or request field.<BR>
 *          MSG_BUFFER_NOT_AVAIL: No HCI buffer is available.<BR>
 *          bleNotConnected: Connection is down.<BR>
 *          blePending: A response is pending with this server.<BR>
 *          bleMemAllocError: Memory allocation error occurred.<BR>
 *          bleTimeout: Previous transaction timed out.<BR>
 */
extern bStatus_t GATT_ReadCharValue( uint16 connHandle, attReadReq_t *pReq, uint8 taskId );

/**
 * @brief   This sub-procedure is used to read a Characteristic Value
 *          from a server when the client only knows the characteristic
 *          UUID and does not know the handle of the characteristic.
 *
 *          The ATT Read By Type Request is used to perform the sub-procedure.
 *          The Attribute Type is set to the known characteristic UUID and
 *          the Starting Handle and Ending Handle parameters shall be set
 *          to the range over which this read is to be performed. This is
 *          typically the handle range for the service in which the 
 *          characteristic belongs.
 *
 *          If the return status from this function is SUCCESS, the calling
 *          application task will receive an OSAL GATT_MSG_EVENT messages.
 *          The type of the message will be either ATT_READ_BY_TYPE_RSP
 *          or ATT_ERROR_RSP (if an error occurred on the server).
 *
 *          Note: This sub-procedure is complete when either ATT_READ_BY_TYPE_RSP
 *                (with SUCCESS or bleTimeout status) or ATT_ERROR_RSP (with
 *                SUCCESS status) is received by the calling application task.
 *
 * @param   connHandle - connection to use
 * @param   pReq - pointer to request to be sent
 * @param   taskId - task to be notified of response
 *
 * @return  SUCCESS: Request was sent successfully.<BR>
 *          INVALIDPARAMETER: Invalid connection handle or request field.<BR>
 *          MSG_BUFFER_NOT_AVAIL: No HCI buffer is available.<BR>
 *          bleNotConnected: Connection is down.<BR>
 *          blePending: A response is pending with this server.<BR>
 *          bleMemAllocError: Memory allocation error occurred.<BR>
 *          bleTimeout: Previous transaction timed out.<BR>
 */
extern bStatus_t GATT_ReadUsingCharUUID( uint16 connHandle, attReadByTypeReq_t *pReq, uint8 taskId );
/**
 * @brief   This sub-procedure is used to read a Characteristic Value from
 *          a server when the client knows the Characteristic Value Handle
 *          and the length of the Characteristic Value is longer than can 
 *          be sent in a single Read Response Attribute Protocol message.
 *
 *          The ATT Read Blob Request is used in this sub-procedure.
 *
 *          If the return status from this function is SUCCESS, the calling
 *          application task will receive multiple OSAL GATT_MSG_EVENT messages.
 *          The type of the messages will be either ATT_READ_BLOB_RSP or
 *          ATT_ERROR_RSP (if an error occurred on the server).
 *
 *          Note: This sub-procedure is complete when either ATT_READ_BLOB_RSP
 *                (with bleProcedureComplete or bleTimeout status) or ATT_ERROR_RSP
 *                (with SUCCESS status) is received by the calling application task.
 *
 * @param   connHandle - connection to use
 * @param   pReq - pointer to request to be sent
 * @param   taskId - task to be notified of response
 *
 * @return  SUCCESS: Request was sent successfully.<BR>
 *          INVALIDPARAMETER: Invalid connection handle or request field.<BR>
 *          MSG_BUFFER_NOT_AVAIL: No HCI buffer is available.<BR>
 *          bleNotConnected: Connection is down.<BR>
 *          blePending: A response is pending with this server.<BR>
 *          bleMemAllocError: Memory allocation error occurred.<BR>
 *          bleTimeout: Previous transaction timed out.<BR>
 */
extern bStatus_t GATT_ReadLongCharValue( uint16 connHandle, attReadBlobReq_t *pReq, uint8 taskId );

/**
 * @brief   This sub-procedure is used to read multiple Characteristic Values
 *          from a server when the client knows the Characteristic Value 
 *          Handles. The Attribute Protocol Read Multiple Requests is used 
 *          with the Set Of Handles parameter set to the Characteristic Value
 *          Handles. The Read Multiple Response returns the Characteristic
 *          Values in the Set Of Values parameter.
 *
 *          The ATT Read Multiple Request is used in this sub-procedure.
 *
 *          If the return status from this function is SUCCESS, the calling
 *          application task will receive an OSAL GATT_MSG_EVENT message.
 *          The type of the message will be either ATT_READ_MULTI_RSP
 *          or ATT_ERROR_RSP (if an error occurred on the server).
 *
 *          Note: This sub-procedure is complete when either ATT_READ_MULTI_RSP
 *                (with SUCCESS or bleTimeout status) or ATT_ERROR_RSP (with
 *                SUCCESS status) is received by the calling application task.
 *
 * @param   connHandle - connection to use
 * @param   pReq - pointer to request to be sent
 * @param   taskId - task to be notified of response
 *
 * @return  SUCCESS: Request was sent successfully.<BR>
 *          INVALIDPARAMETER: Invalid connection handle or request field.<BR>
 *          MSG_BUFFER_NOT_AVAIL: No HCI buffer is available.<BR>
 *          bleNotConnected: Connection is down.<BR>
 *          blePending: A response is pending with this server.<BR>
 *          bleMemAllocError: Memory allocation error occurred.<BR>
 *          bleTimeout: Previous transaction timed out.<BR>
 */
extern bStatus_t GATT_ReadMultiCharValues( uint16 connHandle, attReadMultiReq_t *pReq, uint8 taskId );

/**
 * @brief   This sub-procedure is used to write a Characteristic Value
 *          to a server when the client knows the Characteristic Value
 *          Handle and the client does not need an acknowledgement that
 *          the write was successfully performed. This sub-procedure
 *          only writes the first (ATT_MTU – 3) octets of a Characteristic
 *          Value. This sub-procedure can not be used to write a long
 *          characteristic; instead the Write Long Characteristic Values
 *          sub-procedure should be used.
 * 
 *          The ATT Write Command is used for this sub-procedure. The
 *          Attribute Handle parameter shall be set to the Characteristic
 *          Value Handle. The Attribute Value parameter shall be set to
 *          the new Characteristic Value.
 *
 *          No response will be sent to the calling application task for this
 *          sub-procedure. If the Characteristic Value write request is the 
 *          wrong size, or has an invalid value as defined by the profile, 
 *          then the write will not succeed and no error will be generated 
 *          by the server.
 *
 * @param   connHandle - connection to use
 * @param   pReq - pointer to command to be sent
 *
 * @return  SUCCESS: Request was sent successfully.<BR>
 *          INVALIDPARAMETER: Invalid connection handle or request field.<BR>
 *          MSG_BUFFER_NOT_AVAIL: No HCI buffer is available.<BR>
 *          bleNotConnected: Connection is down.<BR>
 *          bleMemAllocError: Memory allocation error occurred.<BR>
 *          bleTimeout: Previous transaction timed out.<BR>
 */
extern bStatus_t GATT_WriteNoRsp( uint16 connHandle, attWriteReq_t *pReq );

/**
 * @brief   This sub-procedure is used to write a Characteristic Value
 *          to a server when the client knows the Characteristic Value 
 *          Handle and the ATT Bearer is not encrypted. This sub-procedure
 *          shall only be used if the Characteristic Properties authenticated
 *          bit is enabled and the client and server device share a bond as
 *          defined in the GAP.
 *
 *          This sub-procedure only writes the first (ATT_MTU – 15) octets
 *          of an Attribute Value. This sub-procedure cannot be used to 
 *          write a long Attribute.
 *
 *          The ATT Write Command is used for this sub-procedure. The
 *          Attribute Handle parameter shall be set to the Characteristic
 *          Value Handle. The Attribute Value parameter shall be set to 
 *          the new Characteristic Value authenticated by signing the
 *          value, as defined in the Security Manager.
 *
 *          No response will be sent to the calling application task for this
 *          sub-procedure. If the authenticated Characteristic Value that is 
 *          written is the wrong size, or has an invalid value as defined by 
 *          the profile, or the signed value does not authenticate the client,
 *          then the write will not succeed and no error will be generated by
 *          the server.
 *
 * @param   connHandle - connection to use
 * @param   pReq - pointer to command to be sent
 *
 * @return  SUCCESS: Request was sent successfully.<BR>
 *          INVALIDPARAMETER: Invalid connection handle or request field.<BR>
 *          MSG_BUFFER_NOT_AVAIL: No HCI buffer is available.<BR>
 *          bleNotConnected: Connection is down.<BR>
 *          bleMemAllocError: Memory allocation error occurred.<BR>
 *          bleLinkEncrypted: Connection is already encrypted.<BR>
 *          bleTimeout: Previous transaction timed out.<BR>
 */
extern bStatus_t GATT_SignedWriteNoRsp( uint16 connHandle, attWriteReq_t *pReq );

/**
 * @brief   This sub-procedure is used to write a characteristic value
 *          to a server when the client knows the characteristic value
 *          handle. This sub-procedure only writes the first (ATT_MTU-3)
 *          octets of a characteristic value. This sub-procedure can not
 *          be used to write a long attribute; instead the Write Long 
 *          Characteristic Values sub-procedure should be used.
 *
 *          The ATT Write Request is used in this sub-procedure. The 
 *          Attribute Handle parameter shall be set to the Characteristic
 *          Value Handle. The Attribute Value parameter shall be set to
 *          the new characteristic.
 *
 *          If the return status from this function is SUCCESS, the calling
 *          application task will receive an OSAL GATT_MSG_EVENT message.
 *          The type of the message will be either ATT_WRITE_RSP
 *          or ATT_ERROR_RSP (if an error occurred on the server).
 *
 *          Note: This sub-procedure is complete when either ATT_WRITE_RSP
 *                (with SUCCESS or bleTimeout status) or ATT_ERROR_RSP (with
 *                SUCCESS status) is received by the calling application task.
 *
 * @param   connHandle - connection to use
 * @param   pReq - pointer to request to be sent
 * @param   taskId - task to be notified of response
 *
 * @return  SUCCESS: Request was sent successfully.<BR>
 *          INVALIDPARAMETER: Invalid connection handle or request field.<BR>
 *          MSG_BUFFER_NOT_AVAIL: No HCI buffer is available.<BR>
 *          bleNotConnected: Connection is down.<BR>
 *          blePending: A response is pending with this server.<BR>
 *          bleMemAllocError: Memory allocation error occurred.<BR>
 *          bleTimeout: Previous transaction timed out.<BR>
 */
extern bStatus_t GATT_WriteCharValue( uint16 connHandle, attWriteReq_t *pReq, uint8 taskId );

/**
 * @brief   This sub-procedure is used to write a Characteristic Value to
 *          a server when the client knows the Characteristic Value Handle
 *          but the length of the Characteristic Value is longer than can 
 *          be sent in a single Write Request Attribute Protocol message.
 *
 *          The ATT Prepare Write Request and Execute Write Request are
 *          used to perform this sub-procedure.
 *
 *          If the return status from this function is SUCCESS, the calling
 *          application task will receive multiple OSAL GATT_MSG_EVENT messages.
 *          The type of the messages will be either ATT_PREPARE_WRITE_RSP,
 *          ATT_EXECUTE_WRITE_RSP or ATT_ERROR_RSP (if an error occurred on
 *          the server).
 *
 *          Note: This sub-procedure is complete when either ATT_PREPARE_WRITE_RSP
 *                (with bleTimeout status), ATT_EXECUTE_WRITE_RSP (with SUCCESS
 *                or bleTimeout status), or ATT_ERROR_RSP (with SUCCESS status)
 *                is received by the calling application task.
 *
 *          Note: The 'pReq->pValue' pointer will be freed when the sub-procedure
 *                is complete. 
 *
 * @param   connHandle - connection to use
 * @param   pReq - pointer to request to be sent
 * @param   taskId - task to be notified of response
 *
 * @return  SUCCESS: Request was sent successfully.<BR>
 *          INVALIDPARAMETER: Invalid connection handle or request field.<BR>
 *          MSG_BUFFER_NOT_AVAIL: No HCI buffer is available.<BR>
 *          bleNotConnected: Connection is down.<BR>
 *          blePending: A response is pending with this server.<BR>
 *          bleMemAllocError: Memory allocation error occurred.<BR>
 *          bleTimeout: Previous transaction timed out.<BR>
 */
extern bStatus_t GATT_WriteLongCharValue( uint16 connHandle, gattPrepareWriteReq_t *pReq, uint8 taskId );

/**
 * @brief   This sub-procedure is used to write a Characteristic Value to
 *          a server when the client knows the Characteristic Value Handle,
 *          and assurance is required that the correct Characteristic Value
 *          is going to be written by transferring the Characteristic Value
 *          to be written in both directions before the write is performed.
 *          This sub-procedure can also be used when multiple values must 
 *          be written, in order, in a single operation.
 *
 *          The sub-procedure has two phases, the first phase prepares the
 *          characteristic values to be written.  Once this is complete, 
 *          the second phase performs the execution of all of the prepared
 *          characteristic value writes on the server from this client.
 *
 *          In the first phase, the ATT Prepare Write Request is used.
 *          In the second phase, the attribute protocol Execute Write
 *          Request is used.
 *
 *          If the return status from this function is SUCCESS, the calling
 *          application task will receive multiple OSAL GATT_MSG_EVENT messages.
 *          The type of the messages will be either ATT_PREPARE_WRITE_RSP,
 *          ATT_EXECUTE_WRITE_RSP or ATT_ERROR_RSP (if an error occurred on
 *          the server).
 *
 *          Note: This sub-procedure is complete when either ATT_PREPARE_WRITE_RSP
 *                (with bleTimeout status), ATT_EXECUTE_WRITE_RSP (with SUCCESS
 *                or bleTimeout status), or ATT_ERROR_RSP (with SUCCESS status)
 *                is received by the calling application task. 
 *
 *          Note: The 'pReqs' pointer will be freed when the sub-procedure is
 *                complete. 
 *
 * @param   connHandle - connection to use
 * @param   pReqs - pointer to requests to be sent (must be allocated)
 * @param   numReqs - number of requests in pReq
 * @param   flags - execute write request flags
 * @param   taskId - task to be notified of response
 *
 * @return  SUCCESS: Request was sent successfully.<BR>
 *          INVALIDPARAMETER: Invalid connection handle or request field.<BR>
 *          MSG_BUFFER_NOT_AVAIL: No HCI buffer is available.<BR>
 *          bleNotConnected: Connection is down.<BR>
 *          blePending: A response is pending with this server.<BR>
 *          bleMemAllocError: Memory allocation error occurred.<BR>
 *          bleTimeout: Previous transaction timed out.<BR>
 */
extern bStatus_t GATT_ReliableWrites( uint16 connHandle, attPrepareWriteReq_t *pReqs, 
                                      uint8 numReqs, uint8 flags, uint8 taskId );
/**
 * @brief   This sub-procedure is used to read a characteristic descriptor
 *          from a server when the client knows the characteristic descriptor
 *          declaration’s Attribute handle.
 *
 *          The ATT Read Request is used for this sub-procedure. The Read
 *          Request is used with the Attribute Handle parameter set to the 
 *          characteristic descriptor handle. The Read Response returns the
 *          characteristic descriptor value in the Attribute Value parameter.
 *
 *          If the return status from this function is SUCCESS, the calling
 *          application task will receive an OSAL GATT_MSG_EVENT message.
 *          The type of the message will be either ATT_READ_RSP or
 *          ATT_ERROR_RSP (if an error occurred on the server).
 *
 *          Note: This sub-procedure is complete when either ATT_READ_RSP
 *                (with SUCCESS or bleTimeout status) or ATT_ERROR_RSP (with
 *                SUCCESS status) is received by the calling application task.
 *
 * @param   connHandle - connection to use
 * @param   pReq - pointer to request to be sent
 * @param   taskId - task to be notified of response
 *
 * @return  SUCCESS: Request was sent successfully.<BR>
 *          INVALIDPARAMETER: Invalid connection handle or request field.<BR>
 *          MSG_BUFFER_NOT_AVAIL: No HCI buffer is available.<BR>
 *          bleNotConnected: Connection is down.<BR>
 *          blePending: A response is pending with this server.<BR>
 *          bleMemAllocError: Memory allocation error occurred.<BR>
 *          bleTimeout: Previous transaction timed out.<BR>
 */
extern bStatus_t GATT_ReadCharDesc( uint16 connHandle, attReadReq_t *pReq, uint8 taskId );

/**
 * @brief   This sub-procedure is used to read a characteristic descriptor
 *          from a server when the client knows the characteristic descriptor
 *          declaration’s Attribute handle and the length of the characteristic
 *          descriptor declaration is longer than can be sent in a single Read
 *          Response attribute protocol message.
 *
 *          The ATT Read Blob Request is used to perform this sub-procedure.
 *          The Attribute Handle parameter shall be set to the characteristic
 *          descriptor handle. The Value Offset parameter shall be the offset
 *          within the characteristic descriptor to be read.
 *
 *          If the return status from this function is SUCCESS, the calling
 *          application task will receive multiple OSAL GATT_MSG_EVENT messages.
 *          The type of the messages will be either ATT_READ_BLOB_RSP or
 *          ATT_ERROR_RSP (if an error occurred on the server).
 *
 *          Note: This sub-procedure is complete when either ATT_READ_BLOB_RSP
 *                (with bleProcedureComplete or bleTimeout status) or ATT_ERROR_RSP
 *                (with SUCCESS status) is received by the calling application task.
 *
 * @param   connHandle - connection to use
 * @param   pReq - pointer to request to be sent
 * @param   taskId - task to be notified of response
 *
 * @return  SUCCESS: Request was sent successfully.<BR>
 *          INVALIDPARAMETER: Invalid connection handle or request field.<BR>
 *          MSG_BUFFER_NOT_AVAIL: No HCI buffer is available.<BR>
 *          bleNotConnected: Connection is down.<BR>
 *          blePending: A response is pending with this server.<BR>
 *          bleMemAllocError: Memory allocation error occurred.<BR>
 *          bleTimeout: Previous transaction timed out.<BR>
 */
extern bStatus_t GATT_ReadLongCharDesc( uint16 connHandle, attReadBlobReq_t *pReq, uint8 taskId );

/**
 * @brief   This sub-procedure is used to write a characteristic
 *          descriptor value to a server when the client knows the
 *          characteristic descriptor handle.
 *
 *          The ATT Write Request is used for this sub-procedure. The
 *          Attribute Handle parameter shall be set to the characteristic
 *          descriptor handle. The Attribute Value parameter shall be
 *          set to the new characteristic descriptor value.
 *
 *          If the return status from this function is SUCCESS, the calling
 *          application task will receive an OSAL GATT_MSG_EVENT message.
 *          The type of the message will be either ATT_WRITE_RSP
 *          or ATT_ERROR_RSP (if an error occurred on the server).
 *
 *          Note: This sub-procedure is complete when either ATT_WRITE_RSP
 *                (with SUCCESS or bleTimeout status) or ATT_ERROR_RSP (with
 *                SUCCESS status) is received by the calling application task.
 *
 * @param   connHandle - connection to use
 * @param   pReq - pointer to request to be sent
 * @param   taskId - task to be notified of response
 *
 * @return  SUCCESS: Request was sent successfully.<BR>
 *          INVALIDPARAMETER: Invalid connection handle or request field.<BR>
 *          MSG_BUFFER_NOT_AVAIL: No HCI buffer is available.<BR>
 *          bleNotConnected: Connection is down.<BR>
 *          blePending: A response is pending with this server.<BR>
 *          bleMemAllocError: Memory allocation error occurred.<BR>
 *          bleTimeout: Previous transaction timed out.<BR>
 */
extern bStatus_t GATT_WriteCharDesc( uint16 connHandle, attWriteReq_t *pReq, uint8 taskId );

/**
 * @brief   This sub-procedure is used to write a Characteristic Value to
 *          a server when the client knows the Characteristic Value Handle
 *          but the length of the Characteristic Value is longer than can 
 *          be sent in a single Write Request Attribute Protocol message.
 *
 *          The ATT Prepare Write Request and Execute Write Request are
 *          used to perform this sub-procedure.
 *
 *          If the return status from this function is SUCCESS, the calling
 *          application task will receive multiple OSAL GATT_MSG_EVENT messages.
 *          The type of the messages will be either ATT_PREPARE_WRITE_RSP,
 *          ATT_EXECUTE_WRITE_RSP or ATT_ERROR_RSP (if an error occurred on
 *          the server).
 *
 *          Note: This sub-procedure is complete when either ATT_PREPARE_WRITE_RSP
 *                (with bleTimeout status), ATT_EXECUTE_WRITE_RSP (with SUCCESS
 *                or bleTimeout status), or ATT_ERROR_RSP (with SUCCESS status)
 *                is received by the calling application task.
 *
 *          Note: The 'pReq->pValue' pointer will be freed when the sub-procedure
 *                is complete.
 *
 * @param   connHandle - connection to use
 * @param   pReq - pointer to request to be sent
 * @param   taskId - task to be notified of response
 *
 * @return  SUCCESS: Request was sent successfully.<BR>
 *          INVALIDPARAMETER: Invalid connection handle or request field.v
 *          MSG_BUFFER_NOT_AVAIL: No HCI buffer is available.<BR>
 *          bleNotConnected: Connection is down.<BR>
 *          blePending: A response is pending with this server.<BR>
 *          bleMemAllocError: Memory allocation error occurred.<BR>
 *          bleTimeout: Previous transaction timed out.<BR>
 */
extern bStatus_t GATT_WriteLongCharDesc( uint16 connHandle, gattPrepareWriteReq_t *pReq, uint8 taskId );

/**
 * @}
 */

/*-------------------------------------------------------------------
 * GATT Flow Control APIs
 */

/**
 * @defgroup GATT_FLOW_CTRL_API GATT Flow Control API Functions
 * 
 * @{
 */

/**
 * @brief   This API is used by the Application to turn flow control on
 *          or off for GATT messages sent from the Host to the Application.
 *
 *          Note: If the flow control is enabled then the Application must
 *                call the GATT_AppCompletedMsg() API when it completes 
 *                processing an incoming GATT message.
 *
 * @param   flowCtrlMode – flow control mode: TRUE or FALSE
 *
 * @return  void
 */
extern void GATT_SetHostToAppFlowCtrl( uint8 flowCtrlMode );

/**
 * @brief   This API is used by the Application to notify GATT that
 *          the processing of a message has been completed.
 *
 * @param   pMsg – pointer to the processed GATT message
 *
 * @return  void
 */
extern void GATT_AppCompletedMsg( gattMsgEvent_t *pMsg );

/**
 * @}
 */

/*-------------------------------------------------------------------
 * Internal API - This function is only called from GATT Qualification modules.
 */

  /**
   * @internal
   *
   * @brief       Set the next available attribute handle.
   *
   * @param       handle - next attribute handle.
   *
   * @return      none
   */
extern void GATT_SetNextHandle( uint16 handle );

/*-------------------------------------------------------------------
 * TASK API - These functions must only be called by OSAL.
 */

/**
 * @internal
 *
 * @brief   GATT Task initialization function.
 *
 * @param   taskId - GATT task ID.
 *
 * @return  void
 */
extern void GATT_Init( uint8 taskId );

/**
 * @internal
 *
 * @brief   GATT Task event processing function.
 *
 * @param   taskId - GATT task ID
 * @param   events - GATT events.
 *
 * @return  events not processed
 */
extern uint16 GATT_ProcessEvent( uint8 taskId, uint16 events );

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

#ifdef __cplusplus
}
#endif

#endif /* GATT_H */