Diff: nordic/nrf-sdk/s110/ble_gatts.h

Revision:

0:eff01767de02

Child:

37:c29c330d942c

--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/nordic/nrf-sdk/s110/ble_gatts.h	Wed Mar 26 14:38:17 2014 +0000
@@ -0,0 +1,548 @@
+/* Copyright (c) 2011 Nordic Semiconductor. All Rights Reserved.
+ *
+ * The information contained herein is confidential property of Nordic Semiconductor. The use,
+ * copying, transfer or disclosure of such information is prohibited except by express written
+ * agreement with Nordic Semiconductor.
+ *
+ */
+/**
+  @addtogroup BLE_GATTS Generic Attribute Profile (GATT) Server
+  @{
+  @brief  Definitions and prototypes for the GATTS interface.
+ */
+
+#ifndef BLE_GATTS_H__
+#define BLE_GATTS_H__
+
+#include "nordic_global.h"
+#include "ble_types.h"
+#include "ble_ranges.h"
+#include "ble_l2cap.h"
+#include "ble_gap.h"
+#include "ble_gatt.h"
+#include "nrf_svc.h"
+
+
+/**
+ * @brief GATTS API SVC numbers.
+ */
+enum BLE_GATTS_SVCS
+{
+  SD_BLE_GATTS_SERVICE_ADD = BLE_GATTS_SVC_BASE, /**< Add a service. */
+  SD_BLE_GATTS_INCLUDE_ADD,                      /**< Add an included service. */
+  SD_BLE_GATTS_CHARACTERISTIC_ADD,               /**< Add a characteristic. */
+  SD_BLE_GATTS_DESCRIPTOR_ADD,                   /**< Add a generic attribute. */
+  SD_BLE_GATTS_VALUE_SET,                        /**< Set an attribute value. */
+  SD_BLE_GATTS_VALUE_GET,                        /**< Get an attribute value. */
+  SD_BLE_GATTS_HVX,                              /**< Handle Value Notification or Indication. */
+  SD_BLE_GATTS_SERVICE_CHANGED,                  /**< Perform a Service Changed Indication to one or more peers. */
+  SD_BLE_GATTS_RW_AUTHORIZE_REPLY,               /**< Reply to an authorization request for a read or write operation on one or more attributes. */ 
+  SD_BLE_GATTS_SYS_ATTR_SET,                     /**< Set the persistent system attributes for a connection. */  
+  SD_BLE_GATTS_SYS_ATTR_GET,                     /**< Get updated persistent system attributes after terminating a connection. */
+};
+
+
+/** @addtogroup BLE_GATTS_DEFINES Defines
+ * @{ */
+
+/** @brief Only the default MTU size of 23 is currently supported. */
+#define GATT_RX_MTU 23
+
+/** @defgroup BLE_ERRORS_GATTS SVC return values specific to GATTS
+ * @{ */
+#define BLE_ERROR_GATTS_INVALID_ATTR_TYPE   (NRF_GATTS_ERR_BASE + 0x000) /**< Invalid attribute type. */
+#define BLE_ERROR_GATTS_SYS_ATTR_MISSING    (NRF_GATTS_ERR_BASE + 0x001) /**< System Attributes missing. */
+/** @} */
+
+/** @defgroup BLE_GATTS_ATTR_LENS_MAX Maximum attribute lengths
+ * @{ */
+#define BLE_GATTS_FIX_ATTR_LEN_MAX (510)  /**< Maximum length for fixed length Attribute Values. */
+#define BLE_GATTS_VAR_ATTR_LEN_MAX (512)  /**< Maximum length for variable length Attribute Values. */ 
+/** @} */
+
+/** @defgroup BLE_GATTS_SRVC_TYPES GATT Server Service Types
+ * @{ */
+#define BLE_GATTS_SRVC_TYPE_INVALID          0x00  /**< Invalid Service Type. */
+#define BLE_GATTS_SRVC_TYPE_PRIMARY          0x01  /**< Primary Service. */
+#define BLE_GATTS_SRVC_TYPE_SECONDARY        0x02  /**< Secondary Type. */
+/** @} */
+
+
+/** @defgroup BLE_GATTS_ATTR_TYPES GATT Server Attribute Types
+ * @{ */
+#define BLE_GATTS_ATTR_TYPE_INVALID         0x00  /**< Invalid Attribute Type. */
+#define BLE_GATTS_ATTR_TYPE_PRIM_SRVC_DECL  0x01  /**< Primary Service Declaration. */
+#define BLE_GATTS_ATTR_TYPE_SEC_SRVC_DECL   0x02  /**< Secondary Service Declaration. */
+#define BLE_GATTS_ATTR_TYPE_INC_DECL        0x03  /**< Include Declaration. */
+#define BLE_GATTS_ATTR_TYPE_CHAR_DECL       0x04  /**< Characteristic Declaration. */
+#define BLE_GATTS_ATTR_TYPE_CHAR_VAL        0x05  /**< Characteristic Value. */
+#define BLE_GATTS_ATTR_TYPE_DESC            0x06  /**< Descriptor. */
+#define BLE_GATTS_ATTR_TYPE_OTHER           0x07  /**< Other, non-GATT specific type. */
+/** @} */
+
+
+/** @defgroup BLE_GATTS_OPS GATT Server Operations
+ * @{ */
+#define BLE_GATTS_OP_INVALID                0x00  /**< Invalid Operation. */
+#define BLE_GATTS_OP_WRITE_REQ              0x01  /**< Write Request. */
+#define BLE_GATTS_OP_WRITE_CMD              0x02  /**< Write Command. */
+#define BLE_GATTS_OP_SIGN_WRITE_CMD         0x03  /**< Signed Write Command. */
+#define BLE_GATTS_OP_PREP_WRITE_REQ         0x04  /**< Prepare Write Request. */
+#define BLE_GATTS_OP_EXEC_WRITE_REQ_CANCEL  0x05  /**< Execute Write Request: Cancel all prepared writes. */
+#define BLE_GATTS_OP_EXEC_WRITE_REQ_NOW     0x06  /**< Execute Write Request: Immediately execute all prepared writes. */
+/** @} */
+
+/** @defgroup BLE_GATTS_VLOCS GATT Value Locations
+ * @{ */
+#define BLE_GATTS_VLOC_INVALID       0x00  /**< Invalid Location. */
+#define BLE_GATTS_VLOC_STACK         0x01  /**< Attribute Value is located in stack memory, no user memory is required. */
+#define BLE_GATTS_VLOC_USER          0x02  /**< Attribute Value is located in user memory. This requires the user to maintain a valid buffer through the lifetime of the attribute, since the stack
+                                                will read and write directly to the memory using the pointer provided in the APIs. There are no alignment requirements for the buffer. */
+/** @} */
+
+/** @defgroup BLE_GATTS_AUTHORIZE_TYPES GATT Server Authorization Types
+ * @{ */
+#define BLE_GATTS_AUTHORIZE_TYPE_INVALID    0x00  /**< Invalid Type. */
+#define BLE_GATTS_AUTHORIZE_TYPE_READ       0x01  /**< Authorize a Read Operation. */
+#define BLE_GATTS_AUTHORIZE_TYPE_WRITE      0x02  /**< Authorize a Write Request Operation. */
+/** @} */
+
+
+/** @} */
+
+/**@brief Attribute metadata. */
+typedef struct
+{
+  ble_gap_conn_sec_mode_t read_perm;       /**< Read permissions. */
+  ble_gap_conn_sec_mode_t write_perm;      /**< Write permissions. */
+  uint8_t                 vlen       :1;   /**< Variable length attribute. */
+  uint8_t                 vloc       :2;   /**< Value location, see @ref BLE_GATTS_VLOCS.*/
+  uint8_t                 rd_auth    :1;   /**< Read Authorization and value will be requested from the application on every read operation. */ 
+  uint8_t                 wr_auth    :1;   /**< Write Authorization will be requested from the application on every Write Request operation (but not Write Command). */
+} ble_gatts_attr_md_t;
+
+
+/**@brief GATT Attribute. */
+typedef struct
+{
+  ble_uuid_t*          p_uuid;          /**< Pointer to the attribute UUID. */
+  ble_gatts_attr_md_t* p_attr_md;       /**< Pointer to the attribute metadata structure. */
+  uint16_t             init_len;        /**< Initial attribute value length in bytes. */
+  uint16_t             init_offs;       /**< Initial attribute value offset in bytes. If different from zero, the first init_offs bytes of the attribute value will be left uninitialized. */
+  uint16_t             max_len;         /**< Maximum attribute value length in bytes, see @ref BLE_GATTS_ATTR_LENS_MAX for maximum values. */
+  uint8_t*             p_value;         /**< Pointer to the attribute data. Please note that if the @ref BLE_GATTS_VLOC_USER value location is selected in the attribute metadata, this will have to point to a buffer
+                                             that remains valid through the lifetime of the attribute. This excludes usage of automatic variables that may go out of scope or any other temporary location. 
+                                             The stack may access that memory directly without the application's knowledge. */
+} ble_gatts_attr_t;
+
+
+/**@brief GATT Attribute Context. */
+typedef struct
+{
+  ble_uuid_t           srvc_uuid;       /**< Service UUID. */
+  ble_uuid_t           char_uuid;       /**< Characteristic UUID if applicable (BLE_UUID_TYPE_UNKNOWN if N/A). */
+  ble_uuid_t           desc_uuid;       /**< Descriptor UUID if applicable (BLE_UUID_TYPE_UNKNOWN if N/A). */
+  uint16_t             srvc_handle;     /**< Service Handle. */
+  uint16_t             value_handle;    /**< Characteristic Handle if applicable (BLE_GATT_HANDLE_INVALID if N/A). */
+  uint8_t              type;            /**< Attribute Type, see @ref BLE_GATTS_ATTR_TYPES. */
+} ble_gatts_attr_context_t;
+
+
+/**@brief GATT Characteristic Presentation Format. */
+typedef struct
+{
+  uint8_t          format;      /**< Format of the value, see @ref BLE_GATT_CPF_FORMATS. */
+  int8_t           exponent;    /**< Exponent for integer data types. */
+  uint16_t         unit;        /**< UUID from Bluetooth Assigned Numbers. */
+  uint8_t          name_space;  /**< Namespace from Bluetooth Assigned Numbers, see @ref BLE_GATT_CPF_NAMESPACES. */
+  uint16_t         desc;        /**< Namespace description from Bluetooth Assigned Numbers, see @ref BLE_GATT_CPF_NAMESPACES. */
+} ble_gatts_char_pf_t;
+
+
+/**@brief GATT Characteristic metadata. */
+typedef struct
+{
+  ble_gatt_char_props_t       char_props;               /**< Characteristic Properties. */
+  ble_gatt_char_ext_props_t   char_ext_props;           /**< Characteristic Extended Properties. */
+  uint8_t*                    p_char_user_desc;         /**< Pointer to a UTF-8, NULL if the descriptor is not required. */
+  uint16_t                    char_user_desc_max_size;  /**< The maximum size in bytes of the user description descriptor. */
+  uint16_t                    char_user_desc_size;      /**< The size of the user description, must be smaller or equal to char_user_desc_max_size. */ 
+  ble_gatts_char_pf_t*        p_char_pf;                /**< Pointer to a presentation format structure or NULL if the descriptor is not required. */
+  ble_gatts_attr_md_t*        p_user_desc_md;           /**< Attribute metadata for the User Description descriptor, or NULL for default values. */
+  ble_gatts_attr_md_t*        p_cccd_md;                /**< Attribute metadata for the Client Characteristic Configuration Descriptor, or NULL for default values. */
+  ble_gatts_attr_md_t*        p_sccd_md;                /**< Attribute metadata for the Server Characteristic Configuration Descriptor, or NULL for default values. */
+} ble_gatts_char_md_t;
+
+
+/**@brief GATT Characteristic Definition Handles. */
+typedef struct
+{
+  uint16_t          value_handle;       /**< Handle to the characteristic value. */
+  uint16_t          user_desc_handle;   /**< Handle to the User Description descriptor, or BLE_GATT_HANDLE_INVALID if not present. */
+  uint16_t          cccd_handle;        /**< Handle to the Client Characteristic Configuration Descriptor, or BLE_GATT_HANDLE_INVALID if not present. */
+  uint16_t          sccd_handle;        /**< Handle to the Server Characteristic Configuration Descriptor, or BLE_GATT_HANDLE_INVALID if not present. */
+} ble_gatts_char_handles_t;
+
+
+/**@brief GATT HVx parameters. */
+typedef struct
+{
+  uint16_t          handle;             /**< Characteristic Value Handle. */
+  uint8_t           type;               /**< Indication or Notification, see @ref BLE_GATT_HVX_TYPES. */
+  uint16_t          offset;             /**< Offset within the attribute value. */
+  uint16_t*         p_len;              /**< Length in bytes to be written, length in bytes written after successful return. */
+  uint8_t*          p_data;             /**< Actual data content, use NULL to use the current attribute value. */
+} ble_gatts_hvx_params_t;
+
+/**@brief GATT Read Authorization parameters. */
+typedef struct
+{
+  uint16_t          gatt_status;        /**< GATT status code for the operation, see @ref BLE_GATT_STATUS_CODES. */
+  uint8_t           update : 1;         /**< If set, data supplied in p_data will be used in the ATT response. */
+  uint16_t          offset;             /**< Offset of the attribute value being updated. */
+  uint16_t          len;                /**< Length in bytes of the value in p_data pointer, see @ref BLE_GATTS_ATTR_LENS_MAX. */
+  uint8_t*          p_data;             /**< Pointer to new value used to update the attribute value. */
+} ble_gatts_read_authorize_params_t;
+
+/**@brief GATT Write Authorisation parameters. */
+typedef struct
+{
+  uint16_t          gatt_status;        /**< GATT status code for the operation, see @ref BLE_GATT_STATUS_CODES. */
+} ble_gatts_write_authorize_params_t;
+
+/**@brief GATT Read or Write Authorize Reply parameters. */
+typedef struct
+{
+  uint8_t                               type;   /**< Type of authorize operation, see @ref BLE_GATTS_AUTHORIZE_TYPES. */
+  union {
+    ble_gatts_read_authorize_params_t   read;   /**< Read authorization parameters. */
+    ble_gatts_write_authorize_params_t  write;  /**< Write authorization parameters. */
+  } params;
+} ble_gatts_rw_authorize_reply_params_t;
+
+
+/**
+ * @brief GATT Server Event IDs.
+ */
+enum BLE_GATTS_EVTS
+{
+  BLE_GATTS_EVT_WRITE = BLE_GATTS_EVT_BASE,       /**< Write operation performed. */
+  BLE_GATTS_EVT_RW_AUTHORIZE_REQUEST,             /**< Read/Write Authorization request. */
+  BLE_GATTS_EVT_SYS_ATTR_MISSING,                 /**< A persistent system attribute access is pending, awaiting a sd_ble_gatts_sys_attr_set(). */
+  BLE_GATTS_EVT_HVC,                              /**< Handle Value Confirmation. */
+  BLE_GATTS_EVT_SC_CONFIRM,                       /**< Service Changed Confirmation. */
+  BLE_GATTS_EVT_TIMEOUT                           /**< Timeout. */
+};
+
+
+/**@brief Event structure for BLE_GATTS_EVT_WRITE. */
+typedef struct
+{
+  uint16_t                    handle;             /**< Attribute Handle. */
+  uint8_t                     op;                 /**< Type of write operation, see @ref BLE_GATTS_OPS. */
+  ble_gatts_attr_context_t    context;            /**< Attribute Context. */
+  uint16_t                    offset;             /**< Offset for the write operation. */
+  uint16_t                    len;                /**< Length of the incoming data. */
+  uint8_t                     data[1];            /**< Incoming data, variable length. */
+} ble_gatts_evt_write_t;
+
+/**@brief Event structure for authorize read request. */
+typedef struct
+{
+  uint16_t                    handle;             /**< Attribute Handle. */
+  ble_gatts_attr_context_t    context;            /**< Attribute Context. */
+  uint16_t                    offset;             /**< Offset for the read operation. */
+} ble_gatts_evt_read_t;
+
+/**@brief Event structure for BLE_GATTS_EVT_RW_AUTHORIZE_REQUEST. */
+typedef struct
+{
+  uint8_t                     type;             /**< Type of authorize operation, see @ref BLE_GATTS_AUTHORIZE_TYPES. */
+  union {
+    ble_gatts_evt_read_t      read;             /**< Attribute Read Parameters. */
+    ble_gatts_evt_write_t     write;            /**< Attribute Write Parameters. */
+  } request;
+} ble_gatts_evt_rw_authorize_request_t;
+
+/**@brief Event structure for BLE_GATTS_EVT_SYS_ATTR_MISSING. */
+typedef struct
+{
+  uint8_t hint;
+} ble_gatts_evt_sys_attr_missing_t;
+
+
+/**@brief Event structure for BLE_GATTS_EVT_HVC. */
+typedef struct
+{
+  uint16_t          handle;                       /**< Attribute Handle. */
+} ble_gatts_evt_hvc_t;
+
+/**@brief Event structure for BLE_GATTS_EVT_TIMEOUT. */
+typedef struct
+{
+  uint8_t          src;                       /**< Timeout source, see @ref BLE_GATT_TIMEOUT_SOURCES. */
+} ble_gatts_evt_timeout_t;
+
+
+/**@brief GATT Server event callback event structure. */
+typedef struct
+{
+  uint16_t conn_handle;                                       /**< Connection Handle on which event occurred. */
+  union
+  {
+    ble_gatts_evt_write_t                 write;              /**< Write Event Parameters. */
+    ble_gatts_evt_rw_authorize_request_t  authorize_request;  /**< Read or Write Authorize Request Parameters. */
+    ble_gatts_evt_sys_attr_missing_t      sys_attr_missing;   /**< System attributes missing. */
+    ble_gatts_evt_hvc_t                   hvc;                /**< Handle Value Confirmation Event Parameters. */
+    ble_gatts_evt_timeout_t               timeout;            /**< Timeout Event. */
+  } params;
+} ble_gatts_evt_t;
+
+
+/**@brief Add a service declaration to the local server ATT table.
+ *
+ * @param[in] type      Toggles between primary and secondary services, see @ref BLE_GATTS_SRVC_TYPES.
+ * @param[in] p_uuid    Pointer to service UUID.
+ * @param[out] p_handle Pointer to a 16-bit word where the assigned handle will be stored.
+ *
+ * @note Secondary Services are only relevant in the context of the entity that references them, it is therefore forbidden to
+ *       add a secondary service declaration that is not referenced by another service later in the ATT table.
+ *
+ * @return @ref NRF_SUCCESS Successfully added a service declaration.
+ * @return @ref NRF_ERROR_INVALID_ADDR Invalid pointer supplied.
+ * @return @ref NRF_ERROR_INVALID_PARAM Invalid parameter(s) supplied, Vendor Specific UUIDs need to be present in the table.
+ * @return @ref NRF_ERROR_FORBIDDEN Forbidden value supplied, certain UUIDs are reserved for the stack.
+ * @return @ref NRF_ERROR_NO_MEM Not enough memory to complete operation.
+ */
+SVCALL(SD_BLE_GATTS_SERVICE_ADD, uint32_t, sd_ble_gatts_service_add(uint8_t type, ble_uuid_t const*const p_uuid, uint16_t *const p_handle));
+
+
+/**@brief Add an include declaration to the local server ATT table.
+ *
+ * @note It is currently only possible to add an include declaration to the last added service (i.e. only sequential addition is supported at this time). 
+ *
+ * @note The included service must already be present in the ATT table prior to this call.
+ *
+ * @param[in] service_handle    Handle of the service where the included service is to be placed, if BLE_GATT_HANDLE_INVALID is used, it will be placed sequentially.
+ * @param[in] inc_srvc_handle   Handle of the included service.
+ * @param[out] p_include_handle Pointer to a 16-bit word where the assigned handle will be stored.
+ *
+ * @return @ref NRF_SUCCESS Successfully added an include declaration.
+ * @return @ref NRF_ERROR_INVALID_ADDR Invalid pointer supplied.
+ * @return @ref NRF_ERROR_INVALID_PARAM Invalid parameter(s) supplied, handle values need to match previously added services.
+ * @return @ref NRF_ERROR_INVALID_STATE Invalid state to perform operation.
+ * @return @ref NRF_ERROR_FORBIDDEN Forbidden value supplied, self inclusions are not allowed.
+ * @return @ref NRF_ERROR_NO_MEM Not enough memory to complete operation.
+ * @return @ref NRF_ERROR_NOT_FOUND Attribute not found.
+ */
+SVCALL(SD_BLE_GATTS_INCLUDE_ADD, uint32_t, sd_ble_gatts_include_add(uint16_t service_handle, uint16_t inc_srvc_handle, uint16_t *const p_include_handle));
+
+
+/**@brief Add a characteristic declaration, a characteristic value declaration and optional characteristic descriptor declarations to the local server ATT table.
+ *
+ * @note It is currently only possible to add a characteristic to the last added service (i.e. only sequential addition is supported at this time). 
+ *
+ * @note Several restrictions apply to the parameters, such as matching permissions between the user description descriptor and the writeable auxiliaries bits,
+ *       readable (no security) and writeable (selectable) CCCDs and SCCDs and valid presentation format values.
+ *
+ * @note If no metadata is provided for the optional descriptors, their permissions will be derived from the characteristic permissions.
+ *
+ * @param[in] service_handle    Handle of the service where the characteristic is to be placed, if BLE_GATT_HANDLE_INVALID is used, it will be placed sequentially.
+ * @param[in] p_char_md         Characteristic metadata.
+ * @param[in] p_attr_char_value Pointer to the attribute structure corresponding to the characteristic value.
+ * @param[out] p_handles        Pointer to the structure where the assigned handles will be stored.
+ *
+ * @return @ref NRF_SUCCESS Successfully added a characteristic.
+ * @return @ref NRF_ERROR_INVALID_ADDR Invalid pointer supplied.
+ * @return @ref NRF_ERROR_INVALID_PARAM Invalid parameter(s) supplied, service handle, Vendor Specific UUIDs, lengths, and permissions need to adhere to the constraints.
+ * @return @ref NRF_ERROR_INVALID_STATE Invalid state to perform operation, a service context is required.
+ * @return @ref NRF_ERROR_FORBIDDEN Forbidden value supplied, certain UUIDs are reserved for the stack.
+ * @return @ref NRF_ERROR_NO_MEM Not enough memory to complete operation.
+ * @return @ref NRF_ERROR_DATA_SIZE Invalid data size(s) supplied, attribute lengths are restricted by @ref BLE_GATTS_ATTR_LENS_MAX.
+ */
+SVCALL(SD_BLE_GATTS_CHARACTERISTIC_ADD, uint32_t, sd_ble_gatts_characteristic_add(uint16_t service_handle, ble_gatts_char_md_t const*const p_char_md, ble_gatts_attr_t const*const p_attr_char_value, ble_gatts_char_handles_t *const p_handles));
+
+
+/**@brief Add a descriptor to the local server ATT table.
+ *
+ * @note It is currently only possible to add a descriptor to the last added characteristic (i.e. only sequential addition is supported at this time). 
+ *
+ * @param[in] char_handle   Handle of the characteristic where the descriptor is to be placed, if BLE_GATT_HANDLE_INVALID is used, it will be placed sequentially.
+ * @param[in] p_attr        Pointer to the attribute structure.
+ * @param[out] p_handle     Pointer to a 16-bit word where the assigned handle will be stored.
+ *
+ * @return @ref NRF_SUCCESS Successfully added a descriptor.
+ * @return @ref NRF_ERROR_INVALID_ADDR Invalid pointer supplied.
+ * @return @ref NRF_ERROR_INVALID_PARAM Invalid parameter(s) supplied, characteristic handle, Vendor Specific UUIDs, lengths, and permissions need to adhere to the constraints.
+ * @return @ref NRF_ERROR_INVALID_STATE Invalid state to perform operation, a characteristic context is required.
+ * @return @ref NRF_ERROR_FORBIDDEN Forbidden value supplied, certain UUIDs are reserved for the stack.
+ * @return @ref NRF_ERROR_NO_MEM Not enough memory to complete operation.
+ * @return @ref NRF_ERROR_DATA_SIZE Invalid data size(s) supplied, attribute lengths are restricted by @ref BLE_GATTS_ATTR_LENS_MAX.
+ */
+SVCALL(SD_BLE_GATTS_DESCRIPTOR_ADD, uint32_t, sd_ble_gatts_descriptor_add(uint16_t char_handle, ble_gatts_attr_t const * const p_attr, uint16_t* const p_handle));
+
+/**@brief Set the value of a given attribute.
+ *
+ * @param[in] handle    Attribute handle.
+ * @param[in] offset    Offset in bytes to write from.
+ * @param[in,out] p_len Length in bytes to be written, length in bytes written after successful return.
+ * @param[in] p_value   Pointer to a buffer (at least len bytes long) containing the desired attribute value.
+ *
+ * @return @ref NRF_SUCCESS Successfully set the value of the attribute.
+ * @return @ref NRF_ERROR_INVALID_ADDR Invalid pointer supplied.
+ * @return @ref NRF_ERROR_INVALID_PARAM Invalid parameter(s) supplied.
+ * @return @ref NRF_ERROR_NOT_FOUND Attribute not found.
+ * @return @ref NRF_ERROR_FORBIDDEN Forbidden handle supplied, certain attributes are not modifiable by the application.
+ * @return @ref NRF_ERROR_DATA_SIZE Invalid data size(s) supplied, attribute lengths are restricted by @ref BLE_GATTS_ATTR_LENS_MAX.
+ */
+SVCALL(SD_BLE_GATTS_VALUE_SET, uint32_t, sd_ble_gatts_value_set(uint16_t handle, uint16_t offset, uint16_t* const p_len, uint8_t const * const p_value));
+
+/**@brief Get the value of a given attribute.
+ *
+ * @param[in] handle     Attribute handle.
+ * @param[in] offset     Offset in bytes to read from.
+ * @param[in,out] p_len  Length in bytes to be read, total length of attribute value (in bytes, starting from offset) after successful return.
+ * @param[in,out] p_data Pointer to a buffer (at least len bytes long) where to store the attribute value. Set to NULL to obtain the complete length of attribute value.
+ *
+ * @note                 If the attribute value is longer than the size of the supplied buffer,
+ *                       p_len will return the total attribute value length (excluding offset),
+ *                       and not the number of bytes actually returned in p_data.
+ *                       The application may use this information to allocate a suitable buffer size.
+ * 
+ * @return @ref NRF_SUCCESS Successfully retrieved the value of the attribute.
+ * @return @ref NRF_ERROR_INVALID_ADDR Invalid pointer supplied.
+ * @return @ref NRF_ERROR_NOT_FOUND Attribute not found.
+ */
+SVCALL(SD_BLE_GATTS_VALUE_GET, uint32_t, sd_ble_gatts_value_get(uint16_t handle, uint16_t offset, uint16_t *const p_len, uint8_t* const p_data));
+
+/**@brief Notify or Indicate an attribute value.
+ *
+ * @details This function checks for the relevant Client Characteristic Configuration descriptor value to verify that the relevant operation
+ *          (notification or indication) has been enabled by the client. It is also able to update the attribute value before issuing the PDU, so that
+ *          the application can atomically perform a value update and a server initiated transaction with a single API call.
+ *          If the application chooses to indicate an attribute value, a @ref BLE_GATTS_EVT_HVC will be sent up as soon as the confirmation arrives from
+ *          the peer.
+ *
+ * @note    The local attribute value may be updated even if an outgoing packet is not sent to the peer due to an error during execution. 
+ *          When receiveing the error codes @ref NRF_ERROR_INVALID_STATE, @ref NRF_ERROR_BUSY, @ref BLE_ERROR_GATTS_SYS_ATTR_MISSING and 
+ *          @ref BLE_ERROR_NO_TX_BUFFERS the ATT table has been updated.
+ *          The caller can check whether the value has been updated by looking at the contents of *(p_hvx_params->p_len).
+ *
+ * @note    It is important to note that a notification will <b>consume an application buffer</b>, and will therefore 
+ *          generate a @ref BLE_EVT_TX_COMPLETE event when the packet has been transmitted. An indication on the other hand will use the 
+ *          standard server internal buffer and thus will only generate a @ref BLE_GATTS_EVT_HVC event as soon as the confirmation 
+ *          has been received from the peer. Please see the documentation of @ref sd_ble_tx_buffer_count_get for more details.
+ *
+ * @param[in] conn_handle  Connection handle.
+ * @param[in] p_hvx_params Pointer to an HVx parameters structure. If the p_data member contains a non-NULL pointer the attribute value will be updated with
+ *                         the contents pointed by it before sending the notification or indication.
+ *
+ * @return @ref NRF_SUCCESS Successfully queued a notification or indication for transmission, and optionally updated the attribute value.
+ * @return @ref BLE_ERROR_INVALID_CONN_HANDLE Invalid Connection Handle.
+ * @return @ref NRF_ERROR_INVALID_ADDR Invalid pointer supplied.
+ * @return @ref NRF_ERROR_INVALID_PARAM Invalid parameter(s) supplied.
+ * @return @ref BLE_ERROR_INVALID_ATTR_HANDLE Invalid attribute handle(s) supplied. Only attributes added directly by the application are available to notify and indicate.
+ * @return @ref BLE_ERROR_GATTS_INVALID_ATTR_TYPE Invalid attribute type(s) supplied, only characteristic values may be notified and indicated.
+ * @return @ref NRF_ERROR_NOT_FOUND Attribute not found.
+ * @return @ref NRF_ERROR_DATA_SIZE Invalid data size(s) supplied.
+ * @return @ref NRF_ERROR_INVALID_STATE Invalid state to perform operation, notifications or indications must be enabled in the CCCD.
+ * @return @ref NRF_ERROR_BUSY Procedure already in progress.
+ * @return @ref BLE_ERROR_GATTS_SYS_ATTR_MISSING System attributes missing, use @ref sd_ble_gatts_sys_attr_set to set them to a known value.
+ * @return @ref BLE_ERROR_NO_TX_BUFFERS There are no available buffers to send the data, applies only to notifications.
+ */
+SVCALL(SD_BLE_GATTS_HVX, uint32_t, sd_ble_gatts_hvx(uint16_t conn_handle, ble_gatts_hvx_params_t const*const p_hvx_params));
+
+/**@brief Indicate the Service Changed attribute value.
+ *
+ * @details This call will send a Handle Value Indication to one or more peers connected to inform them that the attribute
+ *          table layout has changed. As soon as the peer has confirmed the indication, a @ref BLE_GATTS_EVT_SC_CONFIRM event will
+ *          be issued.
+ *
+ * @note    Some of the restrictions and limitations that apply to @ref sd_ble_gatts_hvx also apply here.
+ *
+ * @param[in] conn_handle  Connection handle.
+ * @param[in] start_handle Start of affected attribute handle range.
+ * @param[in] end_handle   End of affected attribute handle range.
+ *
+ * @return @ref NRF_SUCCESS Successfully queued the Service Changed indication for transmission.
+ * @return @ref BLE_ERROR_INVALID_CONN_HANDLE Invalid Connection Handle.
+ * @return @ref NRF_ERROR_INVALID_PARAM Invalid parameter(s) supplied.
+ * @return @ref BLE_ERROR_INVALID_ATTR_HANDLE Invalid attribute handle(s) supplied, handles must be in the range populated by the application.
+ * @return @ref NRF_ERROR_INVALID_STATE Invalid state to perform operation, notifications or indications must be enabled in the CCCD.
+ * @return @ref NRF_ERROR_BUSY Procedure already in progress.
+ * @return @ref BLE_ERROR_GATTS_SYS_ATTR_MISSING System attributes missing, use @ref sd_ble_gatts_sys_attr_set to set them to a known value.
+ */
+SVCALL(SD_BLE_GATTS_SERVICE_CHANGED, uint32_t, sd_ble_gatts_service_changed(uint16_t conn_handle, uint16_t start_handle, uint16_t end_handle));
+
+/**@brief Respond to a Read/Write authorization request.
+ *
+ * @note This call should only be used as a response to a @ref BLE_GATTS_EVT_RW_AUTHORIZE_REQUEST event issued to the application.
+ *
+ * @param[in] conn_handle                 Connection handle.
+ * @param[in] p_rw_authorize_reply_params Pointer to a structure with the attribute provided by the application.
+ *
+ * @return @ref NRF_SUCCESS               Successfully queued a response to the peer, and in the case of a write operation, ATT table updated.
+ * @return @ref BLE_ERROR_INVALID_CONN_HANDLE Invalid Connection Handle.
+ * @return @ref NRF_ERROR_INVALID_STATE   No authorization request pending.
+ * @return @ref NRF_ERROR_INVALID_PARAM   Authorization op invalid,
+ *                                         or for Read Authorization reply: requested handles not replied with,
+ *                                         or for Write Authorization reply: handle supplied does not match requested handle.
+ */
+SVCALL(SD_BLE_GATTS_RW_AUTHORIZE_REPLY, uint32_t, sd_ble_gatts_rw_authorize_reply(uint16_t conn_handle, ble_gatts_rw_authorize_reply_params_t const*const p_rw_authorize_reply_params));
+
+
+/**@brief Update persistent system attribute information.
+ *
+ * @details Supply to the stack information about persistent system attributes.
+ *          This call is legal in the connected state only, and is usually 
+ *          made immediately after a connection is established and the bond identified.
+ *          usually as a response to a BLE_GATTS_EVT_SYS_ATTR_MISSING.
+ *
+ *          p_sysattrs may point directly to the application's stored copy of the struct.
+ *          If the pointer is NULL, the system attribute info is initialized, assuming that
+ *          the application does not have any previously saved data for this bond.
+ *
+ * @note The state of persistent system attributes is reset upon connection and then remembered for its duration. 
+ *
+ * @note If this call returns with an error code different from @ref NRF_SUCCESS, the storage of persistent system attributes may have been completed only partially.
+ *       This means that the state of the attribute table is undefined, and the application should either provide a new set of attributes using this same call or
+ *       reset the SoftDevice to return to a known state.
+ *
+ * @param[in]  conn_handle        Connection handle.
+ * @param[in]  p_sys_attr_data    Pointer to a saved copy of system attributes supplied to the stack, or NULL.
+ * @param[in]  len                Size of data pointed by p_sys_attr_data, in octets. 
+ *
+ * @return @ref NRF_SUCCESS Successfully set the system attribute information.
+ * @return @ref BLE_ERROR_INVALID_CONN_HANDLE Invalid Connection Handle.
+ * @return @ref NRF_ERROR_INVALID_DATA Invalid data supplied, the data should be exactly the same as retrieved with @ref sd_ble_gatts_sys_attr_get.
+ * @return @ref NRF_ERROR_NO_MEM Not enough memory to complete operation.
+ */ 
+SVCALL(SD_BLE_GATTS_SYS_ATTR_SET, uint32_t, sd_ble_gatts_sys_attr_set(uint16_t conn_handle, uint8_t const*const p_sys_attr_data, uint16_t len)); 
+
+ 
+/**@brief Retrieve persistent system attribute information from the stack.
+ *
+ * @details This call is used to retrieve information about values to be stored perisistently by the application
+ *          after a connection has been terminated. When a new connection is made to the same bond, the values
+ *          should be restored using @ref sd_ble_gatts_sys_attr_set.
+ *          The data should be read before any new advertising is started, or any new connection established. The connection handle for
+ *          the previous now defunct connection will remain valid until a new one is created to allow this API call to refer to it.
+ *
+ * @param[in]     conn_handle       Connection handle of the recently terminated connection.
+ * @param[in]     p_sys_attr_data   Pointer to a buffer where updated information about system attributes will be filled in. NULL can be provided to 
+ *                                  obtain the length of the data
+ * @param[in,out] p_len             Size of application buffer if p_sys_attr_data is not NULL. Unconditially updated to actual length of system attribute data.
+ *
+ * @return @ref NRF_SUCCESS Successfully retrieved the system attribute information.
+ * @return @ref BLE_ERROR_INVALID_CONN_HANDLE Invalid Connection Handle.
+ * @return @ref NRF_ERROR_INVALID_ADDR Invalid pointer supplied.
+ * @return @ref NRF_ERROR_DATA_SIZE The system attribute information did not fit into the provided buffer.
+ */ 
+SVCALL(SD_BLE_GATTS_SYS_ATTR_GET, uint32_t, sd_ble_gatts_sys_attr_get(uint16_t conn_handle, uint8_t * const p_sys_attr_data, uint16_t* const p_len)); 
+
+
+#endif // BLE_GATTS_H__
+
+/**
+  @}
+*/