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+/*************************************************************************************************/
+/*!
+ *  \file
+ *
+ *  \brief  GAP profile.
+ *
+ *  Copyright (c) 2015-2018 Arm Ltd.
+ *
+ *  Copyright (c) 2019 Packetcraft, Inc.
+ *
+ *  Licensed under the Apache License, Version 2.0 (the "License");
+ *  you may not use this file except in compliance with the License.
+ *  You may obtain a copy of the License at
+ *
+ *      http://www.apache.org/licenses/LICENSE-2.0
+ *
+ *  Unless required by applicable law or agreed to in writing, software
+ *  distributed under the License is distributed on an "AS IS" BASIS,
+ *  WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ *  See the License for the specific language governing permissions and
+ *  limitations under the License.
+ */
+/*************************************************************************************************/
+#ifndef GAP_API_H
+#define GAP_API_H
+
+#include "att_api.h"
+
+#ifdef __cplusplus
+extern "C" {
+#endif
+
+/*! \addtogroup GAP_PROFILE
+ *  \{ */
+
+/**************************************************************************************************
+  Macros
+**************************************************************************************************/
+
+/*! \brief Enumeration of handle indexes of characteristics to be discovered */
+enum
+{
+  GAP_CAR_HDL_IDX,          /*!< \brief Central Address Resolution */
+  GAP_RPAO_HDL_IDX,         /*!< \brief Resolvable Private Address Only */
+  GAP_HDL_LIST_LEN          /*!< \brief Handle list length */
+};
+
+/**************************************************************************************************
+  Function Declarations
+**************************************************************************************************/
+
+/*************************************************************************************************/
+/*!
+ *  \brief  Perform service and characteristic discovery for GAP service.  Note that pHdlList
+ *          must point to an array of handles of length \ref GAP_HDL_LIST_LEN.  If discovery is
+ *          successful the handles of discovered characteristics and descriptors will be set
+ *          in pHdlList.
+ *
+ *  \param  connId    Connection identifier.
+ *  \param  pHdlList  Characteristic handle list.
+ *
+ *  \return None.
+ */
+/*************************************************************************************************/
+void GapDiscover(dmConnId_t connId, uint16_t *pHdlList);
+
+/*************************************************************************************************/
+/*!
+ *  \brief  Process a value received in an ATT read response, notification, or indication
+ *          message.  Parameter pHdlList must point to an array of length \ref GAP_HDL_LIST_LEN.
+ *          If the attribute handle of the message matches a handle in the handle list the value
+ *          is processed, otherwise it is ignored.
+ *
+ *  \param  pHdlList  Characteristic handle list.
+ *  \param  pMsg      ATT callback message.
+ *
+ *  \return \ref ATT_SUCCESS if handle is found, \ref ATT_ERR_NOT_FOUND otherwise.
+ */
+/*************************************************************************************************/
+uint8_t GapValueUpdate(uint16_t *pHdlList, attEvt_t *pMsg);
+
+/*! \} */    /* GAP_PROFILE */
+
+#ifdef __cplusplus
+};
+#endif
+
+#endif /* GAP_API_H */
@@ -0,0 +1,127 @@
+/*************************************************************************************************/
+/*!
+ *  \file
+ *
+ *  \brief  GAP profile.
+ *
+ *  Copyright (c) 2015-2018 Arm Ltd.
+ *
+ *  Copyright (c) 2019 Packetcraft, Inc.
+ *
+ *  Licensed under the Apache License, Version 2.0 (the "License");
+ *  you may not use this file except in compliance with the License.
+ *  You may obtain a copy of the License at
+ *
+ *      http://www.apache.org/licenses/LICENSE-2.0
+ *
+ *  Unless required by applicable law or agreed to in writing, software
+ *  distributed under the License is distributed on an "AS IS" BASIS,
+ *  WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ *  See the License for the specific language governing permissions and
+ *  limitations under the License.
+ */
+/*************************************************************************************************/
+
+#include "wsf_types.h"
+#include "wsf_assert.h"
+#include "wsf_trace.h"
+#include "app_db.h"
+#include "app_api.h"
+#include "gap_api.h"
+
+/**************************************************************************************************
+  Local Variables
+**************************************************************************************************/
+
+/*! GAP service characteristics for discovery */
+
+/*! Central Address Resolution */
+static const attcDiscChar_t gapCar =
+{
+  attCarChUuid,
+  0
+};
+
+/*! Resolvable Private Address Only */
+static const attcDiscChar_t gapRpao =
+{
+  attRpaoChUuid,
+  0
+};
+
+/*! List of characteristics to be discovered; order matches handle index enumeration  */
+static const attcDiscChar_t *gapDiscCharList[] =
+{
+  &gapCar,                   /* Central Address Resolution */
+  &gapRpao                   /* Resolvable Private Address Only */
+};
+
+/* sanity check:  make sure handle list length matches characteristic list length */
+WSF_CT_ASSERT(GAP_HDL_LIST_LEN == ((sizeof(gapDiscCharList) / sizeof(attcDiscChar_t *))));
+
+/*************************************************************************************************/
+/*!
+ *  \brief  Perform service and characteristic discovery for GAP service.  Note that pHdlList
+ *          must point to an array of handles of length GAP_HDL_LIST_LEN.  If discovery is
+ *          successful the handles of discovered characteristics and descriptors will be set
+ *          in pHdlList.
+ *
+ *  \param  connId    Connection identifier.
+ *  \param  pHdlList  Characteristic handle list.
+ *
+ *  \return None.
+ */
+/*************************************************************************************************/
+void GapDiscover(dmConnId_t connId, uint16_t *pHdlList)
+{
+  AppDiscFindService(connId, ATT_16_UUID_LEN, (uint8_t *) attGapSvcUuid,
+                     GAP_HDL_LIST_LEN, (attcDiscChar_t **) gapDiscCharList, pHdlList);
+}
+
+/*************************************************************************************************/
+/*!
+ *  \brief  Process a value received in an ATT read response, notification, or indication
+ *          message.  Parameter pHdlList must point to an array of length GAP_HDL_LIST_LEN.
+ *          If the attribute handle of the message matches a handle in the handle list the value
+ *          is processed, otherwise it is ignored.
+ *
+ *  \param  pHdlList  Characteristic handle list.
+ *  \param  pMsg      ATT callback message.
+ *
+ *  \return ATT_SUCCESS if handle is found, ATT_ERR_NOT_FOUND otherwise.
+ */
+/*************************************************************************************************/
+uint8_t GapValueUpdate(uint16_t *pHdlList, attEvt_t *pMsg)
+{
+  uint8_t status = ATT_SUCCESS;
+
+  /* Central Address Resolution */
+  if (pMsg->handle == pHdlList[GAP_CAR_HDL_IDX])
+  {
+    appDbHdl_t dbHdl;
+
+    /* if there's a device record */
+    if ((dbHdl = AppDbGetHdl((dmConnId_t)pMsg->hdr.param)) != APP_DB_HDL_NONE)
+    {
+      if ((pMsg->pValue[0] == FALSE) || (pMsg->pValue[0] == TRUE))
+      {
+        /* store value in device database */
+        AppDbSetPeerAddrRes(dbHdl, pMsg->pValue[0]);
+      }
+      else
+      {
+        /* invalid value */
+        status = ATT_ERR_RANGE;
+      }
+
+      APP_TRACE_INFO1("Central address resolution: %d", pMsg->pValue[0]);
+    }
+  }
+  /* handle not found in list */
+  else
+  {
+    status = ATT_ERR_NOT_FOUND;
+  }
+
+  return status;
+}