Adding fix for Sonarqube major issues for IoTivity 1.2-rel
[platform/upstream/iotivity.git] / resource / csdk / connectivity / src / bt_le_adapter / caleadapter.c
index e459eb0..10fdffd 100644 (file)
 
 #include "caleinterface.h"
 #include "cacommon.h"
-#include "camutex.h"
+#include "octhread.h"
 #include "caadapterutils.h"
+#ifdef __WITH_DTLS__
+#include "ca_adapter_net_ssl.h"
+#endif
 #ifndef SINGLE_THREAD
 #include "caqueueingthread.h"
 #endif
@@ -38,7 +41,7 @@
 #include "oic_malloc.h"
 #include "oic_string.h"
 #include "caremotehandler.h"
-#include "pdu.h"
+#include <coap/pdu.h>
 
 /**
  * Logging tag for module name.
@@ -48,8 +51,7 @@
 /**
  * Stores information of all the senders.
  *
- * This structure will be used to track and defragment all incoming
- * data packet.
+ * This structure will be used to track and defragment all incoming data packet.
  */
 typedef struct
 {
@@ -57,7 +59,8 @@ typedef struct
     uint32_t totalDataLen;
     uint8_t *defragData;
     CAEndpoint_t *remoteEndpoint;
- } CABLESenderInfo_t;
+    uint8_t refCount;
+} CABLESenderInfo_t;
 
 typedef enum
 {
@@ -68,6 +71,12 @@ typedef enum
 } CABLEAdapter_t;
 
 /**
+ * mtu size to use in fragmentation logic.
+ * default value is 20 byte.
+ */
+static uint16_t g_mtuSize = CA_DEFAULT_BLE_MTU_SIZE;
+
+/**
  * Callback to provide the status of the network change to CA layer.
  */
 static CAAdapterChangeCallback g_networkCallback = NULL;
@@ -93,23 +102,21 @@ static char g_localBLEAddress[18] = { 0 };
  */
 static CABLEAdapter_t g_adapterType = ADAPTER_EMPTY;
 
+#ifdef __WITH_DTLS__
+static CADataType_t g_dataType = CA_REQUEST_DATA;
+#endif
+
 /**
  * Mutex to synchronize the task to be executed on the GattServer
  * function calls.
  */
-static ca_mutex g_bleIsServerMutex = NULL;
-
-/**
- * Mutex to synchronize the callback to be called for the network
- * changes.
- */
-static ca_mutex g_bleNetworkCbMutex = NULL;
+static oc_mutex g_bleIsServerMutex = NULL;
 
 /**
  * Mutex to synchronize the updates of the local LE address of the
  * adapter.
  */
-static ca_mutex g_bleLocalAddressMutex = NULL;
+static oc_mutex g_bleLocalAddressMutex = NULL;
 
 /**
  * Reference to thread pool.
@@ -117,30 +124,14 @@ static ca_mutex g_bleLocalAddressMutex = NULL;
 static ca_thread_pool_t g_bleAdapterThreadPool = NULL;
 
 /**
- * Mutex to synchronize the task to be pushed to thread pool.
- */
-static ca_mutex g_bleAdapterThreadPoolMutex = NULL;
-
-/**
- * Mutex to synchronize the queing of the data from SenderQueue.
- */
-static ca_mutex g_bleClientSendDataMutex = NULL;
-
-/**
  * Mutex to synchronize the queing of the data from ReceiverQueue.
  */
-static ca_mutex g_bleReceiveDataMutex = NULL;
+static oc_mutex g_bleClientReceiveDataMutex = NULL;
 
 /**
- * Mutex to synchronize the queing of the data from SenderQueue.
- */
-static ca_mutex g_bleServerSendDataMutex = NULL;
-
-/**
- * Mutex to synchronize the callback to be called for the
- * adapterReqResponse.
+ * Mutex to synchronize the queing of the data from ReceiverQueue.
  */
-static ca_mutex g_bleAdapterReqRespCbMutex = NULL;
+static oc_mutex g_bleServerReceiveDataMutex = NULL;
 
 /**
  * Callback to be called when network packet received from either
@@ -153,6 +144,14 @@ static CANetworkPacketReceivedCallback g_networkPacketReceivedCallback = NULL;
  */
 static CAErrorHandleCallback g_errorHandler = NULL;
 
+#ifdef __WITH_DTLS__
+static CAResult_t CALESecureReceiveDataCB(const CASecureEndpoint_t *endpoint,
+                                 const void *data, size_t dataLength);
+
+static ssize_t CALESecureSendDataCB(CAEndpoint_t *endpoint,
+                             const void *data, size_t dataLength);
+#endif
+
 #ifdef SINGLE_THREAD
 /**
  * Pointer to defragment received data from single threaded routine.
@@ -263,31 +262,49 @@ static void CALEErrorHandler(const char *remoteAddress,
 
 #ifndef SINGLE_THREAD
 /**
- * Stop condition of recvhandler.
+ * Stop condition of Server recvhandler.
  */
-static bool g_dataBleReceiverHandlerState = false;
+static bool g_dataBleServerReceiverHandlerState = false;
 
 /**
- * Sender information.
+ * Stop condition of Client recvhandler.
+ */
+static bool g_dataBleClientReceiverHandlerState = false;
+
+/**
+ * Sender information of Server.
  */
 static u_arraylist_t *g_bleServerSenderInfo = NULL;
 
+/**
+ * Sender information of Client.
+ */
 static u_arraylist_t *g_bleClientSenderInfo = NULL;
 
 /**
+ * Mutex to synchronize access to all senderInfos
+ */
+static oc_mutex g_senderInfoMutex = NULL;
+
+/**
+ * Queue to process the outgoing packets from GATTServer.
+ */
+static CAQueueingThread_t *g_bleServerSendQueueHandle = NULL;
+
+/**
  * Queue to process the outgoing packets from GATTClient.
  */
 static CAQueueingThread_t *g_bleClientSendQueueHandle = NULL;
 
 /**
- * Queue to process the incoming packets.
+ * Queue to process the incoming packets from GATTServer.
  */
-static CAQueueingThread_t *g_bleReceiverQueue = NULL;
+static CAQueueingThread_t *g_bleServerReceiverQueue = NULL;
 
 /**
- * Queue to process the outgoing packets from GATTServer.
+ * Queue to process the incoming packets from GATTClient.
  */
-static CAQueueingThread_t *g_bleServerSendQueueHandle = NULL;
+static CAQueueingThread_t *g_bleClientReceiverQueue = NULL;
 
 /**
  * This function will be associated with the sender queue for
@@ -316,16 +333,39 @@ static void CALEServerSendDataThread(void *threadData);
 static void CALEClientSendDataThread(void *threadData);
 
 /**
- * This function will be associated with the receiver queue.
- *
  * This function will defragment the received data from each sender
  * respectively and will send it up to CA layer.  Respective sender's
  * header will provide the length of the data sent.
  *
+ * @param[in] threadData   Data pushed to the queue which contains the
+ *                         info about RemoteEndpoint and Data.
+ * @param[in] receiverType Whether receiver is server or client.
+ */
+static void CALEDataReceiverHandler(void *threadData, CABLEAdapter_t receiverType);
+
+/**
+ * This function will be associated with the receiver queue for
+ * GattServer.
+ *
+ * This function will call the function CALEDataReceiverHandler()
+ * with server type to defragment the received data.
+ *
+ * @param[in] threadData Data pushed to the queue which contains the
+ *                       info about RemoteEndpoint and Data.
+ */
+static void CALEServerDataReceiverHandler(void *threadData);
+
+/**
+ * This function will be associated with the receiver queue for
+ * GattClient.
+ *
+ * This function will call the function CALEDataReceiverHandler()
+ * with client type to defragment the received data.
+ *
  * @param[in] threadData Data pushed to the queue which contains the
  *                       info about RemoteEndpoint and Data.
  */
-static void CALEDataReceiverHandler(void *threadData);
+static void CALEClientDataReceiverHandler(void *threadData);
 
 /**
  * This function will stop all queues created for GattServer and
@@ -396,8 +436,22 @@ static CAResult_t CAInitLEClientSenderQueue();
 
 /**
  * This function will initialize the Receiver queue for
- * LEAdapter. This will initialize the queue to process the function
- * CABLEDataReceiverHandler() when ever the task is added to this
+ * GattServer. This will initialize the queue to process the function
+ * CALEServerDataReceiverHandler() when ever the task is added to this
+ * queue.
+ *
+ * @return ::CA_STATUS_OK or Appropriate error code
+ * @retval ::CA_STATUS_OK  Successful
+ * @retval ::CA_STATUS_INVALID_PARAM  Invalid input arguments
+ * @retval ::CA_STATUS_FAILED Operation failed
+ *
+ */
+static CAResult_t CAInitLEServerReceiverQueue();
+
+/**
+ * This function will initialize the Receiver queue for
+ * GattClient. This will initialize the queue to process the function
+ * CALEClientDataReceiverHandler() when ever the task is added to this
  * queue.
  *
  * @return ::CA_STATUS_OK or Appropriate error code
@@ -406,7 +460,7 @@ static CAResult_t CAInitLEClientSenderQueue();
  * @retval ::CA_STATUS_FAILED Operation failed
  *
  */
-static CAResult_t CAInitLEReceiverQueue();
+static CAResult_t CAInitLEClientReceiverQueue();
 
 /**
  * This function will create the Data required to send it in the
@@ -449,7 +503,6 @@ static void CALEDataDestroyer(void *data, uint32_t size);
  * @param[in] address        target address to remove data in queue.
  */
 static void CALERemoveSendQueueData(CAQueueingThread_t *queueHandle,
-                                    ca_mutex mutex,
                                     const char* address);
 
 /**
@@ -464,9 +517,11 @@ static void CALERemoveReceiveQueueData(u_arraylist_t *dataInfoList,
 /**
  * get received data info and positioned index from the received data list
  * for client / server which is matched same leAddress and port.
+ * CABLESenderInfo_t is reference counted structure, you must call
+ * CALEFreeSenderInfo on senderInfo to release reference.
  *
  * @param[in]  leAddress       target address to get serderInfo.
- * @param[in]  port            target port to get serderInfo.
+ * @param[in]  port            target port to get senderInfo.
  * @param[in]  senderInfoList  received data list for client / server.
  * @param[out] senderInfo      Pointer to contain matched(leAddress and port)
  *                             received data info.
@@ -480,6 +535,36 @@ static CAResult_t CALEGetSenderInfo(const char *leAddress,
                                     uint32_t *senderIndex);
 
 /**
+ * Add sender info to list.
+ *
+ * @param[in] u_arraylist_t   Array list to add sender info to.
+ * @param[in] senderInfo      Sender info to be added to list.
+ *
+ * @return true on success, otherwise false.
+ */
+static bool CALEAddSenderInfoToList(u_arraylist_t *senderInfoList,
+                                          CABLESenderInfo_t *senderInfo);
+
+/**
+ * Remove desired sender info from list.
+ *
+ * @param[in] u_arraylist_t   Array list to remove sender info from.
+ * @param[in] senderInfo      Sender info to be removed from list.
+ *
+ */
+static void CALERemoveSenderInfoFromList(u_arraylist_t *senderInfoList,
+                                         CABLESenderInfo_t *senderInfo);
+
+/**
+ * Free sender info. CABLESenderInfo_t is reference counted structure
+ * and info will be freed only when reference count reaches 0 or negative.
+ *
+ * @param[in] senderInfo      Sender info to be freed.
+ *
+ */
+static CAResult_t CALEFreeSenderInfo(CABLESenderInfo_t *senderInfo);
+
+/**
  * get ports related to remote address. It is need because multi application
  * can have more than 2 senderInfo using same BLE address. So before remove
  * receive queue data, should get port list from sender Info.
@@ -495,15 +580,11 @@ static CAResult_t CALEGetPortsFromSenderInfo(const char *leAddress,
 
 static CAResult_t CAInitLEServerQueues()
 {
-    OIC_LOG(DEBUG, CALEADAPTER_TAG, "IN");
-
-    ca_mutex_lock(g_bleAdapterThreadPoolMutex);
-
     CAResult_t result = CAInitLEServerSenderQueue();
     if (CA_STATUS_OK != result)
     {
         OIC_LOG(ERROR, CALEADAPTER_TAG, "CAInitBleServerSenderQueue failed");
-        ca_mutex_unlock(g_bleAdapterThreadPoolMutex);
+        
         return CA_STATUS_FAILED;
     }
 
@@ -511,38 +592,27 @@ static CAResult_t CAInitLEServerQueues()
     if (!g_bleServerSenderInfo)
     {
         OIC_LOG(ERROR, CALEADAPTER_TAG, "memory allocation failed!");
-        ca_mutex_unlock(g_bleAdapterThreadPoolMutex);
         return CA_MEMORY_ALLOC_FAILED;
     }
 
-    result = CAInitLEReceiverQueue();
+    result = CAInitLEServerReceiverQueue();
     if (CA_STATUS_OK != result)
     {
-        OIC_LOG(ERROR, CALEADAPTER_TAG, "CAInitLEReceiverQueue failed");
+        OIC_LOG(ERROR, CALEADAPTER_TAG, "CAInitLEServerReceiverQueue failed");
         u_arraylist_free(&g_bleServerSenderInfo);
-        ca_mutex_unlock(g_bleAdapterThreadPoolMutex);
         return CA_STATUS_FAILED;
     }
 
-    g_dataBleReceiverHandlerState = true;
-
-    ca_mutex_unlock(g_bleAdapterThreadPoolMutex);
-
-    OIC_LOG(DEBUG, CALEADAPTER_TAG, "OUT");
+    g_dataBleServerReceiverHandlerState = true;
     return CA_STATUS_OK;
 }
 
 static CAResult_t CAInitLEClientQueues()
 {
-    OIC_LOG(DEBUG, CALEADAPTER_TAG, "IN");
-
-    ca_mutex_lock(g_bleAdapterThreadPoolMutex);
-
     CAResult_t result = CAInitLEClientSenderQueue();
     if (CA_STATUS_OK != result)
     {
         OIC_LOG(ERROR, CALEADAPTER_TAG, "CAInitBleClientSenderQueue failed");
-        ca_mutex_unlock(g_bleAdapterThreadPoolMutex);
         return CA_STATUS_FAILED;
     }
 
@@ -550,71 +620,105 @@ static CAResult_t CAInitLEClientQueues()
     if (!g_bleClientSenderInfo)
     {
         OIC_LOG(ERROR, CALEADAPTER_TAG, "memory allocation failed!");
-        ca_mutex_unlock(g_bleAdapterThreadPoolMutex);
         return CA_MEMORY_ALLOC_FAILED;
     }
 
-    result = CAInitLEReceiverQueue();
+    result = CAInitLEClientReceiverQueue();
     if (CA_STATUS_OK != result)
     {
-        OIC_LOG(ERROR, CALEADAPTER_TAG, "CAInitLEReceiverQueue failed");
+        OIC_LOG(ERROR, CALEADAPTER_TAG, "CAInitLEClientReceiverQueue failed");
         u_arraylist_free(&g_bleClientSenderInfo);
-        ca_mutex_unlock(g_bleAdapterThreadPoolMutex);
         return CA_STATUS_FAILED;
     }
 
-    g_dataBleReceiverHandlerState = true;
+    g_dataBleClientReceiverHandlerState = true;
 
-    ca_mutex_unlock(g_bleAdapterThreadPoolMutex);
+    return CA_STATUS_OK;
+}
+
+static CAResult_t CAInitLEServerReceiverQueue()
+{
+    OIC_LOG_V(DEBUG, CALEADAPTER_TAG, "%s", __func__);
+    // Check if the message queue is already initialized
+    if (g_bleServerReceiverQueue)
+    {
+        OIC_LOG(DEBUG, CALEADAPTER_TAG, "Already queue is initialized!");
+        return CA_STATUS_OK;
+    }
+
+    // Create recv message queue
+    g_bleServerReceiverQueue = (CAQueueingThread_t *) OICMalloc(sizeof(CAQueueingThread_t));
+    if (!g_bleServerReceiverQueue)
+    {
+        OIC_LOG(ERROR, CALEADAPTER_TAG, "Memory allocation failed!");
+        return CA_MEMORY_ALLOC_FAILED;
+    }
+
+    if (CA_STATUS_OK != CAQueueingThreadInitialize(g_bleServerReceiverQueue,
+                                                   g_bleAdapterThreadPool,
+                                                   CALEServerDataReceiverHandler,
+                                                   CALEDataDestroyer))
+    {
+        OIC_LOG(ERROR, CALEADAPTER_TAG, "Failed to Initialize server receiver queue thread");
+        OICFree(g_bleServerReceiverQueue);
+        g_bleServerReceiverQueue = NULL;
+        return CA_STATUS_FAILED;
+    }
+
+    if (CA_STATUS_OK != CAQueueingThreadStart(g_bleServerReceiverQueue))
+    {
+        OIC_LOG(ERROR, CALEADAPTER_TAG, "ca_thread_pool_add_task failed ");
+        OICFree(g_bleServerReceiverQueue);
+        g_bleServerReceiverQueue = NULL;
+        return CA_STATUS_FAILED;
+    }
 
-    OIC_LOG(DEBUG, CALEADAPTER_TAG, "OUT");
     return CA_STATUS_OK;
 }
 
-static CAResult_t CAInitLEReceiverQueue()
+static CAResult_t CAInitLEClientReceiverQueue()
 {
-    OIC_LOG(DEBUG, CALEADAPTER_TAG, "IN - CAInitLEReceiverQueue");
+    OIC_LOG_V(DEBUG, CALEADAPTER_TAG, "%s", __func__);
     // Check if the message queue is already initialized
-    if (g_bleReceiverQueue)
+    if (g_bleClientReceiverQueue)
     {
         OIC_LOG(DEBUG, CALEADAPTER_TAG, "Already queue is initialized!");
         return CA_STATUS_OK;
     }
 
     // Create recv message queue
-    g_bleReceiverQueue = (CAQueueingThread_t *) OICMalloc(sizeof(CAQueueingThread_t));
-    if (!g_bleReceiverQueue)
+    g_bleClientReceiverQueue = (CAQueueingThread_t *) OICMalloc(sizeof(CAQueueingThread_t));
+    if (!g_bleClientReceiverQueue)
     {
         OIC_LOG(ERROR, CALEADAPTER_TAG, "Memory allocation failed!");
         return CA_MEMORY_ALLOC_FAILED;
     }
 
-    if (CA_STATUS_OK != CAQueueingThreadInitialize(g_bleReceiverQueue,
+    if (CA_STATUS_OK != CAQueueingThreadInitialize(g_bleClientReceiverQueue,
                                                    g_bleAdapterThreadPool,
-                                                   CALEDataReceiverHandler,
+                                                   CALEClientDataReceiverHandler,
                                                    CALEDataDestroyer))
     {
-        OIC_LOG(ERROR, CALEADAPTER_TAG, "Failed to Initialize send queue thread");
-        OICFree(g_bleReceiverQueue);
-        g_bleReceiverQueue = NULL;
+        OIC_LOG(ERROR, CALEADAPTER_TAG, "Failed to Initialize client receiver queue thread");
+        OICFree(g_bleClientReceiverQueue);
+        g_bleClientReceiverQueue = NULL;
         return CA_STATUS_FAILED;
     }
 
-    if (CA_STATUS_OK != CAQueueingThreadStart(g_bleReceiverQueue))
+    if (CA_STATUS_OK != CAQueueingThreadStart(g_bleClientReceiverQueue))
     {
         OIC_LOG(ERROR, CALEADAPTER_TAG, "ca_thread_pool_add_task failed ");
-        OICFree(g_bleReceiverQueue);
-        g_bleReceiverQueue = NULL;
+        OICFree(g_bleClientReceiverQueue);
+        g_bleClientReceiverQueue = NULL;
         return CA_STATUS_FAILED;
     }
 
-    OIC_LOG(DEBUG, CALEADAPTER_TAG, "OUT");
     return CA_STATUS_OK;
 }
 
 static CAResult_t CAInitLEServerSenderQueue()
 {
-    OIC_LOG(DEBUG, CALEADAPTER_TAG, "IN - CAInitLEServerSenderQueue");
+    OIC_LOG_V(DEBUG, CALEADAPTER_TAG, "%s", __func__);
     // Check if the message queue is already initialized
     if (g_bleServerSendQueueHandle)
     {
@@ -641,12 +745,12 @@ static CAResult_t CAInitLEServerSenderQueue()
         return CA_STATUS_FAILED;
     }
 
-    OIC_LOG(DEBUG, CALEADAPTER_TAG, "OUT");
     return CA_STATUS_OK;
 }
 
-static void CALEClearSenderInfoImpl(u_arraylist_t ** list)
+static void CALEClearSenderInfoImpl(u_arraylist_t **list)
 {
+    oc_mutex_lock(g_senderInfoMutex);
     const size_t length = u_arraylist_length(*list);
     for (size_t i = 0; i < length; ++i)
     {
@@ -660,6 +764,7 @@ static void CALEClearSenderInfoImpl(u_arraylist_t ** list)
          }
     }
     u_arraylist_free(list);
+    oc_mutex_unlock(g_senderInfoMutex);
 }
 
 static void CALEClearSenderInfo()
@@ -670,7 +775,7 @@ static void CALEClearSenderInfo()
 
 static CAResult_t CAInitLEClientSenderQueue()
 {
-    OIC_LOG(DEBUG, CALEADAPTER_TAG, "IN - CAInitLEClientSenderQueue");
+    OIC_LOG_V(DEBUG, CALEADAPTER_TAG, "%s", __func__);
 
     if (g_bleClientSendQueueHandle)
     {
@@ -695,29 +800,32 @@ static CAResult_t CAInitLEClientSenderQueue()
         g_bleClientSendQueueHandle = NULL;
         return CA_STATUS_FAILED;
     }
-
-    OIC_LOG(DEBUG, CALEADAPTER_TAG, "OUT - CAInitLEClientSenderQueue");
     return CA_STATUS_OK;
 }
 
 static void CAStopLEQueues()
 {
-    OIC_LOG(DEBUG, CALEADAPTER_TAG, "IN - CAStopLEQueues");
+    OIC_LOG_V(DEBUG, CALEADAPTER_TAG, "IN %s", __func__);
 
-    ca_mutex_lock(g_bleReceiveDataMutex);
-    if (NULL != g_bleReceiverQueue)
+    oc_mutex_lock(g_bleServerReceiveDataMutex);
+    if (NULL != g_bleServerReceiverQueue)
     {
-        CAQueueingThreadStop(g_bleReceiverQueue);
+        CAQueueingThreadStop(g_bleServerReceiverQueue);
     }
-    ca_mutex_unlock(g_bleReceiveDataMutex);
+    oc_mutex_unlock(g_bleServerReceiveDataMutex);
 
-    OIC_LOG(DEBUG, CALEADAPTER_TAG, "OUT - CAStopLEQueues");
+    oc_mutex_lock(g_bleClientReceiveDataMutex);
+    if (NULL != g_bleClientReceiverQueue)
+    {
+        CAQueueingThreadStop(g_bleClientReceiverQueue);
+    }
+    oc_mutex_unlock(g_bleClientReceiveDataMutex);
+
+    OIC_LOG_V(DEBUG, CALEADAPTER_TAG, "OUT %s", __func__);
 }
 
 static void CATerminateLEQueues()
 {
-    OIC_LOG(DEBUG, CALEADAPTER_TAG, "IN");
-
     CAQueueingThreadDestroy(g_bleClientSendQueueHandle);
     OICFree(g_bleClientSendQueueHandle);
     g_bleClientSendQueueHandle = NULL;
@@ -726,13 +834,15 @@ static void CATerminateLEQueues()
     OICFree(g_bleServerSendQueueHandle);
     g_bleServerSendQueueHandle = NULL;
 
-    CAQueueingThreadDestroy(g_bleReceiverQueue);
-    OICFree(g_bleReceiverQueue);
-    g_bleReceiverQueue = NULL;
+    CAQueueingThreadDestroy(g_bleServerReceiverQueue);
+    OICFree(g_bleServerReceiverQueue);
+    g_bleServerReceiverQueue = NULL;
 
-    CALEClearSenderInfo();
+    CAQueueingThreadDestroy(g_bleClientReceiverQueue);
+    OICFree(g_bleClientReceiverQueue);
+    g_bleClientReceiverQueue = NULL;
 
-    OIC_LOG(DEBUG, CALEADAPTER_TAG, "OUT");
+    CALEClearSenderInfo();
 }
 
 static CAResult_t CALEGetSenderInfo(const char *leAddress,
@@ -750,6 +860,7 @@ static CAResult_t CALEGetSenderInfo(const char *leAddress,
                         "NULL index argument",
                         CA_STATUS_INVALID_PARAM);
 
+    oc_mutex_lock(g_senderInfoMutex);
     const uint32_t listLength = u_arraylist_length(senderInfoList);
     const uint32_t addrLength = strlen(leAddress);
     for (uint32_t index = 0; index < listLength; index++)
@@ -760,52 +871,118 @@ static CAResult_t CALEGetSenderInfo(const char *leAddress,
             continue;
         }
 
-        if (!strncmp(info->remoteEndpoint->addr, leAddress, addrLength))
+        if (!strncmp(info->remoteEndpoint->addr, leAddress, addrLength)
+            && info->remoteEndpoint->port == port)
         {
-            if (info->remoteEndpoint->port == port)
+            *senderIndex = index;
+            if (senderInfo)
             {
-                *senderIndex = index;
-                if (senderInfo)
-                {
-                    *senderInfo = info;
-                }
-                return CA_STATUS_OK;
+                *senderInfo = info;
+                (*senderInfo)->refCount++;
             }
+            oc_mutex_unlock(g_senderInfoMutex);
+            return CA_STATUS_OK;
         }
     }
 
+    oc_mutex_unlock(g_senderInfoMutex);
     return CA_STATUS_FAILED;
 }
 
-static void CALEDataReceiverHandler(void *threadData)
+static bool CALEAddSenderInfoToList(u_arraylist_t *senderInfoList, CABLESenderInfo_t *senderInfo)
+{
+    oc_mutex_lock(g_senderInfoMutex);
+    senderInfo->refCount++;
+    if (!u_arraylist_add(senderInfoList,(void *)senderInfo))
+    {
+        senderInfo->refCount--;
+        oc_mutex_unlock(g_senderInfoMutex);
+        return false;
+    }
+    oc_mutex_unlock(g_senderInfoMutex);
+    return true;
+}
+
+static void CALERemoveSenderInfoFromList(u_arraylist_t *senderInfoList, CABLESenderInfo_t *senderInfo)
 {
-    OIC_LOG(DEBUG, CALEADAPTER_TAG, "IN - CALEDataReceiverHandler");
+    oc_mutex_lock(g_senderInfoMutex);
+    uint32_t idx;
+    bool elemFound = u_arraylist_get_index(senderInfoList, (const void*)senderInfo, &idx);
+    if(elemFound)
+    {
+        void *info = u_arraylist_remove(senderInfoList, idx);
+        if (info != NULL)
+        {
+            senderInfo->refCount--;
+        }
+    }
+    oc_mutex_unlock(g_senderInfoMutex);
+}
 
-    ca_mutex_lock(g_bleReceiveDataMutex);
+static CAResult_t CALEFreeSenderInfo(CABLESenderInfo_t *senderInfo)
+{
+    VERIFY_NON_NULL_RET(senderInfo,
+                        CALEADAPTER_TAG,
+                        "NULL senderInfo to remove argument",
+                        CA_STATUS_INVALID_PARAM);
 
-    if (g_dataBleReceiverHandlerState)
+    oc_mutex_lock(g_senderInfoMutex);
+    senderInfo->refCount--;
+    if(senderInfo->refCount <= 0)
     {
-        OIC_LOG(DEBUG, CALEADAPTER_TAG, "checking for DE Fragmentation");
+        OICFree(senderInfo->defragData);
+        OICFree(senderInfo->remoteEndpoint);
+        OICFree(senderInfo);
+    }
+    oc_mutex_unlock(g_senderInfoMutex);
+    return CA_STATUS_OK;
+}
+
+static void CALEDataReceiverHandler(void *threadData, CABLEAdapter_t receiverType)
+{
+    OIC_LOG_V(DEBUG, CALEADAPTER_TAG, "%s", __func__);
+
+    oc_mutex bleReceiveDataMutex = NULL;
+    bool dataBleReceiverHandlerState = false;
 
+    switch (receiverType)
+    {
+        case ADAPTER_CLIENT:
+            bleReceiveDataMutex = g_bleClientReceiveDataMutex;
+            dataBleReceiverHandlerState = g_dataBleClientReceiverHandlerState;
+            break;
+        case ADAPTER_SERVER:
+            bleReceiveDataMutex = g_bleServerReceiveDataMutex;
+            dataBleReceiverHandlerState = g_dataBleServerReceiverHandlerState;
+            break;
+        default:
+            OIC_LOG_V(ERROR, CALEADAPTER_TAG, "Unsupported receiver type : %d", receiverType);
+            return;
+    }
+
+    oc_mutex_lock(bleReceiveDataMutex);
+
+    if (dataBleReceiverHandlerState)
+    {
         CALEData_t *bleData = (CALEData_t *) threadData;
         if (!bleData)
         {
             OIC_LOG(DEBUG, CALEADAPTER_TAG, "Invalid bleData!");
-            ca_mutex_unlock(g_bleReceiveDataMutex);
+            oc_mutex_unlock(bleReceiveDataMutex);
             return;
         }
 
         if (!(bleData->senderInfo))
         {
             OIC_LOG(ERROR, CALEADAPTER_TAG, "sender info is not available");
-            ca_mutex_unlock(g_bleReceiveDataMutex);
+            oc_mutex_unlock(bleReceiveDataMutex);
             return;
         }
 
         if (!(bleData->remoteEndpoint))
         {
-            OIC_LOG(ERROR, CALEADAPTER_TAG, "Client RemoteEndPoint NULL!!");
-            ca_mutex_unlock(g_bleReceiveDataMutex);
+            OIC_LOG(ERROR, CALEADAPTER_TAG, "RemoteEndPoint NULL!!");
+            oc_mutex_unlock(bleReceiveDataMutex);
             return;
         }
 
@@ -819,7 +996,7 @@ static void CALEDataReceiverHandler(void *threadData)
         uint16_t destPort = 0;
 
         CAParseHeader(bleData->data, &startFlag, &sourcePort, &secureFlag, &destPort);
-        OIC_LOG_V(DEBUG, CALEADAPTER_TAG,
+        OIC_LOG_V(INFO, CALEADAPTER_TAG,
                   "header info: startFlag[%X] sourcePort[%d] secureFlag[%X] destPort[%d]",
                   startFlag, sourcePort, secureFlag, destPort);
 
@@ -828,7 +1005,7 @@ static void CALEDataReceiverHandler(void *threadData)
             OIC_LOG_V(ERROR, CALEADAPTER_TAG,
                       "this packet is not valid for this app(port mismatch[mine:%d, packet:%d])",
                       g_localBLESourcePort, destPort);
-            ca_mutex_unlock(g_bleReceiveDataMutex);
+            oc_mutex_unlock(bleReceiveDataMutex);
             return;
         }
 
@@ -848,9 +1025,8 @@ static void CALEDataReceiverHandler(void *threadData)
             {
                 OIC_LOG(ERROR, CALEADAPTER_TAG,
                         "This packet is start packet but exist senderInfo. Remove senderInfo");
-                u_arraylist_remove(bleData->senderInfo, senderIndex);
-                OICFree(senderInfo->defragData);
-                OICFree(senderInfo);
+                CALERemoveSenderInfoFromList(bleData->senderInfo, senderInfo);
+                CALEFreeSenderInfo(senderInfo);
                 senderInfo = NULL;
                 senderIndex = 0;
             }
@@ -866,39 +1042,34 @@ static void CALEDataReceiverHandler(void *threadData)
             else
             {
                 OIC_LOG(ERROR, CALEADAPTER_TAG, "This packet is wrong packet! ignore.");
-                ca_mutex_unlock(g_bleReceiveDataMutex);
+                oc_mutex_unlock(bleReceiveDataMutex);
                 return;
             }
 
-            CABLESenderInfo_t *newSender = OICMalloc(sizeof(CABLESenderInfo_t));
+            CABLESenderInfo_t *newSender = OICCalloc(1, sizeof(CABLESenderInfo_t));
             if (!newSender)
             {
                 OIC_LOG(ERROR, CALEADAPTER_TAG, "Memory allocation failed for new sender");
-                ca_mutex_unlock(g_bleReceiveDataMutex);
+                oc_mutex_unlock(bleReceiveDataMutex);
                 return;
             }
-            newSender->recvDataLen = 0;
-            newSender->totalDataLen = 0;
-            newSender->defragData = NULL;
-            newSender->remoteEndpoint = NULL;
 
             OIC_LOG(DEBUG, CALEADAPTER_TAG, "Parsing the header");
 
             newSender->totalDataLen = totalLength;
-
             if (!(newSender->totalDataLen))
             {
                 OIC_LOG(ERROR, CALEADAPTER_TAG, "Total Data Length is parsed as 0!!!");
-                OICFree(newSender);
-                ca_mutex_unlock(g_bleReceiveDataMutex);
+                CALEFreeSenderInfo(newSender);
+                oc_mutex_unlock(bleReceiveDataMutex);
                 return;
             }
 
             size_t dataOnlyLen =
                 bleData->dataLen - (CA_BLE_HEADER_SIZE + CA_BLE_LENGTH_HEADER_SIZE);
-            OIC_LOG_V(DEBUG, CALEADAPTER_TAG, "Total data to be accumulated [%u] bytes",
+            OIC_LOG_V(INFO, CALEADAPTER_TAG, "Total data to be accumulated [%u] bytes",
                       newSender->totalDataLen);
-            OIC_LOG_V(DEBUG, CALEADAPTER_TAG, "data received in the first packet [%u] bytes",
+            OIC_LOG_V(INFO, CALEADAPTER_TAG, "data received in the first packet [%zu] bytes",
                       dataOnlyLen);
 
             newSender->defragData = OICCalloc(newSender->totalDataLen + 1,
@@ -907,13 +1078,20 @@ static void CALEDataReceiverHandler(void *threadData)
             if (NULL == newSender->defragData)
             {
                 OIC_LOG(ERROR, CALEADAPTER_TAG, "defragData is NULL!");
-                OICFree(newSender);
-                ca_mutex_unlock(g_bleReceiveDataMutex);
+                CALEFreeSenderInfo(newSender);
+                oc_mutex_unlock(bleReceiveDataMutex);
                 return;
             }
+            CATransportFlags_t flags = CA_DEFAULT_FLAGS;
+#ifdef __WITH_DTLS__
+            if (CA_BLE_PACKET_SECURE == secureFlag)
+            {
+                flags |= CA_SECURE;
+            }
+#endif
 
             const char *remoteAddress = bleData->remoteEndpoint->addr;
-            newSender->remoteEndpoint = CACreateEndpointObject(CA_DEFAULT_FLAGS,
+            newSender->remoteEndpoint = CACreateEndpointObject(flags,
                                                                CA_ADAPTER_GATT_BTLE,
                                                                remoteAddress,
                                                                bleData->remoteEndpoint->port);
@@ -921,19 +1099,16 @@ static void CALEDataReceiverHandler(void *threadData)
             if (NULL == newSender->remoteEndpoint)
             {
                 OIC_LOG(ERROR, CALEADAPTER_TAG, "remoteEndpoint is NULL!");
-                OICFree(newSender->defragData);
-                OICFree(newSender);
-                ca_mutex_unlock(g_bleReceiveDataMutex);
+                CALEFreeSenderInfo(newSender);
+                oc_mutex_unlock(bleReceiveDataMutex);
                 return;
             }
 
             if (newSender->recvDataLen + dataOnlyLen > newSender->totalDataLen)
             {
                 OIC_LOG(ERROR, CALEADAPTER_TAG, "buffer is smaller than received data");
-                OICFree(newSender->defragData);
-                CAFreeEndpoint(newSender->remoteEndpoint);
-                OICFree(newSender);
-                ca_mutex_unlock(g_bleReceiveDataMutex);
+                CALEFreeSenderInfo(newSender);
+                oc_mutex_unlock(bleReceiveDataMutex);
                 return;
             }
             memcpy(newSender->defragData,
@@ -941,22 +1116,16 @@ static void CALEDataReceiverHandler(void *threadData)
                    dataOnlyLen);
             newSender->recvDataLen += dataOnlyLen;
 
-            u_arraylist_add(bleData->senderInfo,(void *)newSender);
+            newSender->refCount = 1;
 
-            //Getting newSender index position in bleSenderInfo array list
-            if (CA_STATUS_OK !=
-                    CALEGetSenderInfo(newSender->remoteEndpoint->addr,
-                                      newSender->remoteEndpoint->port,
-                                      bleData->senderInfo,
-                                      NULL, &senderIndex))
+            if (!CALEAddSenderInfoToList(bleData->senderInfo, newSender))
             {
-                OIC_LOG(ERROR, CALEADAPTER_TAG, "Existing sender index not found!!");
-                OICFree(newSender->defragData);
-                CAFreeEndpoint(newSender->remoteEndpoint);
-                OICFree(newSender);
-                ca_mutex_unlock(g_bleReceiveDataMutex);
+                OIC_LOG(ERROR, CALEADAPTER_TAG, "Failed to add sender info!");
+                CALEFreeSenderInfo(newSender);
+                oc_mutex_unlock(bleReceiveDataMutex);
                 return;
             }
+
             senderInfo = newSender;
         }
         else
@@ -965,71 +1134,133 @@ static void CALEDataReceiverHandler(void *threadData)
             if (senderInfo->recvDataLen + dataOnlyLen > senderInfo->totalDataLen)
             {
                 OIC_LOG_V(ERROR, CALEADAPTER_TAG,
-                          "Data Length exceeding error!! Receiving [%d] total length [%d]",
+                          "Data Length exceeding error!! Receiving [%zu] total length [%u]",
                           senderInfo->recvDataLen + dataOnlyLen, senderInfo->totalDataLen);
-                u_arraylist_remove(bleData->senderInfo, senderIndex);
-                OICFree(senderInfo->defragData);
-                OICFree(senderInfo);
-                ca_mutex_unlock(g_bleReceiveDataMutex);
+                CALERemoveSenderInfoFromList(bleData->senderInfo, senderInfo);
+                CALEFreeSenderInfo(senderInfo);
+                oc_mutex_unlock(bleReceiveDataMutex);
                 return;
             }
-            OIC_LOG_V(DEBUG, CALEADAPTER_TAG, "Copying the data of length [%d]",
+            OIC_LOG_V(DEBUG, CALEADAPTER_TAG, "Copying the data of length [%zu]",
                       dataOnlyLen);
             memcpy(senderInfo->defragData + senderInfo->recvDataLen,
                    bleData->data + CA_BLE_HEADER_SIZE,
                    dataOnlyLen);
             senderInfo->recvDataLen += dataOnlyLen;
-            OIC_LOG_V(DEBUG, CALEADAPTER_TAG, "totalDatalength  [%d] received Datalen [%d]",
-                                                senderInfo->totalDataLen, senderInfo->recvDataLen);
+            OIC_LOG_V(INFO, CALEADAPTER_TAG, "totalDatalength  [%d] received Datalen [%d]",
+                      senderInfo->totalDataLen, senderInfo->recvDataLen);
         }
 
         if (senderInfo->totalDataLen == senderInfo->recvDataLen)
         {
-            ca_mutex_lock(g_bleAdapterReqRespCbMutex);
             if (NULL == g_networkPacketReceivedCallback)
             {
                 OIC_LOG(ERROR, CALEADAPTER_TAG, "gReqRespCallback is NULL!");
-
-                u_arraylist_remove(bleData->senderInfo, senderIndex);
-                OICFree(senderInfo->defragData);
-                OICFree(senderInfo);
-                ca_mutex_unlock(g_bleAdapterReqRespCbMutex);
-                ca_mutex_unlock(g_bleReceiveDataMutex);
+                CALERemoveSenderInfoFromList(bleData->senderInfo, senderInfo);
+                CALEFreeSenderInfo(senderInfo);
+                oc_mutex_unlock(bleReceiveDataMutex);
                 return;
             }
 
-            OIC_LOG(DEBUG, CALEADAPTER_TAG, "[CALEDataReceiverHandler] Sending data up !");
+            OIC_LOG(DEBUG, CALEADAPTER_TAG, "[CALEDataReceiverHandler] Received data up !");
 
             const CASecureEndpoint_t tmp =
                 {
                     .endpoint = *senderInfo->remoteEndpoint
                 };
 
-            g_networkPacketReceivedCallback(&tmp,
-                                            senderInfo->defragData,
-                                            senderInfo->recvDataLen);
-            ca_mutex_unlock(g_bleAdapterReqRespCbMutex);
-            u_arraylist_remove(bleData->senderInfo, senderIndex);
+            OIC_LOG_V(INFO, CALEADAPTER_TAG, "endpoint flags : %d", tmp.endpoint.flags);
+#ifdef __WITH_DTLS__
+            if (CA_SECURE & tmp.endpoint.flags)
+            {
+                OIC_LOG(DEBUG, CALEADAPTER_TAG, "Secure data received");
+                switch (receiverType)
+                {
+                    case ADAPTER_CLIENT:
+                        g_dataType = CA_REQUEST_DATA;
+                        break;
+                    case ADAPTER_SERVER:
+                        g_dataType = CA_RESPONSE_DATA;
+                        break;
+                    default:
+                        OIC_LOG_V(ERROR, CALEADAPTER_TAG, "Unsupported rcvr type:%d",receiverType);
+                        CALERemoveSenderInfoFromList(bleData->senderInfo, senderInfo);
+                        senderInfo->remoteEndpoint = NULL;
+                        senderInfo->defragData = NULL;
+                        CALEFreeSenderInfo(senderInfo);
+                        oc_mutex_unlock(bleReceiveDataMutex);
+                        return;
+                }
+
+                if (CA_STATUS_FAILED == CAdecryptSsl(&tmp,
+                                                senderInfo->defragData,
+                                                senderInfo->recvDataLen))
+                {
+                    OIC_LOG(ERROR, CALEADAPTER_TAG, "CAdecryptSsl failed");
+                }
+                else
+                {
+                    OIC_LOG(DEBUG, CALEADAPTER_TAG, "CAdecryptSsl successed");
+                }
+                OICFree(senderInfo->defragData);
+            }
+            else
+            {
+#endif
+                OIC_LOG(INFO, CALEADAPTER_TAG, "Non-Secure data received");
+                g_networkPacketReceivedCallback(&tmp,
+                                                senderInfo->defragData,
+                                                senderInfo->recvDataLen);
+#ifdef __WITH_DTLS__
+            }
+#endif
+
+            CALERemoveSenderInfoFromList(bleData->senderInfo, senderInfo);
             senderInfo->remoteEndpoint = NULL;
             senderInfo->defragData = NULL;
-            OICFree(senderInfo);
+            CALEFreeSenderInfo(senderInfo);
+            oc_mutex_unlock(bleReceiveDataMutex);
+            return;
         }
+        CALEFreeSenderInfo(senderInfo);
     }
-    ca_mutex_unlock(g_bleReceiveDataMutex);
-    OIC_LOG(DEBUG, CALEADAPTER_TAG, "OUT");
+    oc_mutex_unlock(bleReceiveDataMutex);
+}
+
+
+static void CALEServerDataReceiverHandler(void *threadData)
+{
+    CALEDataReceiverHandler(threadData, ADAPTER_SERVER);
+}
+
+static void CALEClientDataReceiverHandler(void *threadData)
+{
+    CALEDataReceiverHandler(threadData, ADAPTER_CLIENT);
 }
 
 static void CALEServerSendDataThread(void *threadData)
 {
-    OIC_LOG(DEBUG, CALEADAPTER_TAG, "IN - CALEServerSendDataThread");
+    OIC_LOG_V(DEBUG, CALEADAPTER_TAG, "IN %s", __func__);
 
     CALEData_t * const bleData = (CALEData_t *) threadData;
     if (!bleData)
     {
-        OIC_LOG(DEBUG, CALEADAPTER_TAG, "Invalid bledata!");
+        OIC_LOG(ERROR, CALEADAPTER_TAG, "Invalid bledata!");
+        return;
+    }
+
+    if (!bleData->remoteEndpoint)
+    {
+        OIC_LOG(ERROR, CALEADAPTER_TAG, "Invalid endpoint of bledata!");
         return;
     }
 
+#if defined(__TIZEN__) || defined(__ANDROID__)
+    // get MTU size
+    g_mtuSize = CALEServerGetMtuSize(bleData->remoteEndpoint->addr);
+#endif
+    OIC_LOG_V(INFO, CALEADAPTER_TAG, "MTU size [%d]", g_mtuSize);
+
     uint32_t midPacketCount = 0;
     size_t remainingLen = 0;
     size_t totalLength = 0;
@@ -1038,23 +1269,27 @@ static void CALEServerSendDataThread(void *threadData)
     CAResult_t result = CAGenerateVariableForFragmentation(bleData->dataLen,
                                                            &midPacketCount,
                                                            &remainingLen,
-                                                           &totalLength);
+                                                           &totalLength,
+                                                           g_mtuSize);
 
     if (CA_STATUS_OK != result)
     {
         OIC_LOG_V(ERROR, CALEADAPTER_TAG,
                   "CAGenerateVariableForFragmentation failed, result [%d]", result);
-        g_errorHandler(bleData->remoteEndpoint, bleData->data, bleData->dataLen, result);
+        if (g_errorHandler)
+        {
+            g_errorHandler(bleData->remoteEndpoint, bleData->data, bleData->dataLen, result);
+        }
         return;
     }
 
     OIC_LOG_V(DEBUG, CALEADAPTER_TAG,
-              "Packet info: data size[%d] midPacketCount[%d] remainingLen[%d] totalLength[%d]",
+              "Packet info: data size[%d] midPacketCount[%u] remainingLen[%zu] totalLength[%zu]",
               bleData->dataLen, midPacketCount, remainingLen, totalLength);
 
     OIC_LOG_V(DEBUG,
               CALEADAPTER_TAG,
-              "Server total Data length with header is [%u]",
+              "Server total Data length with header is [%zu]",
               totalLength);
 
     uint8_t dataSegment[CA_SUPPORTED_BLE_MTU_SIZE] = {0};
@@ -1062,9 +1297,10 @@ static void CALEServerSendDataThread(void *threadData)
 
     if (NULL != bleData->remoteEndpoint) //Unicast Data
     {
-        secureFlag = bleData->remoteEndpoint->flags == CA_SECURE ?
+        secureFlag = (bleData->remoteEndpoint->flags & CA_SECURE) ?
             CA_BLE_PACKET_SECURE : CA_BLE_PACKET_NON_SECURE;
 
+        OIC_LOG_V(DEBUG, CALEADAPTER_TAG, "This Packet is secure? %d", secureFlag);
         result = CAGenerateHeader(dataHeader,
                                   CA_BLE_PACKET_START,
                                   g_localBLESourcePort,
@@ -1079,12 +1315,16 @@ static void CALEServerSendDataThread(void *threadData)
                                   secureFlag,
                                   CA_BLE_MULTICAST_PORT);
     }
+    OIC_LOG_V(INFO, CALEADAPTER_TAG, "header info: secureFlag[%X]", secureFlag);
 
     if (CA_STATUS_OK != result)
     {
         OIC_LOG_V(ERROR, CALEADAPTER_TAG,
                   "CAGenerateHeader failed, result [%d]", result);
-        g_errorHandler(bleData->remoteEndpoint, bleData->data, bleData->dataLen, result);
+        if (g_errorHandler)
+        {
+            g_errorHandler(bleData->remoteEndpoint, bleData->data, bleData->dataLen, result);
+        }
         return;
     }
 
@@ -1097,21 +1337,24 @@ static void CALEServerSendDataThread(void *threadData)
     {
         OIC_LOG_V(ERROR, CALEADAPTER_TAG,
                   "CAGenerateHeaderPayloadLength failed, result [%d]", result);
-        g_errorHandler(bleData->remoteEndpoint, bleData->data, bleData->dataLen, result);
+        if (g_errorHandler)
+        {
+            g_errorHandler(bleData->remoteEndpoint, bleData->data, bleData->dataLen, result);
+        }
         return;
     }
 
     uint32_t length = 0;
     uint32_t dataLen = 0;
-    if (CA_SUPPORTED_BLE_MTU_SIZE > totalLength)
+    if (g_mtuSize > totalLength)
     {
-        length = totalLength;
+        length = (uint32_t)totalLength;
         dataLen = bleData->dataLen;
     }
     else
     {
-        length = CA_SUPPORTED_BLE_MTU_SIZE;
-        dataLen = CA_SUPPORTED_BLE_MTU_SIZE - CA_BLE_HEADER_SIZE - CA_BLE_LENGTH_HEADER_SIZE;
+        length = g_mtuSize;
+        dataLen = g_mtuSize - CA_BLE_HEADER_SIZE - CA_BLE_LENGTH_HEADER_SIZE;
     }
 
     result = CAMakeFirstDataSegment(dataSegment,
@@ -1122,7 +1365,10 @@ static void CALEServerSendDataThread(void *threadData)
     {
         OIC_LOG_V(ERROR, CALEADAPTER_TAG,
                   "Making data segment failed, result [%d]", result);
-        g_errorHandler(bleData->remoteEndpoint, bleData->data, bleData->dataLen, result);
+        if (g_errorHandler)
+        {
+            g_errorHandler(bleData->remoteEndpoint, bleData->data, bleData->dataLen, result);
+        }
         return;
     }
 
@@ -1143,17 +1389,19 @@ static void CALEServerSendDataThread(void *threadData)
                       CALEADAPTER_TAG,
                       "Update characteristics failed, result [%d]",
                       result);
-
-            g_errorHandler(bleData->remoteEndpoint,
-                           bleData->data,
-                           bleData->dataLen,
-                           result);
+            if (g_errorHandler)
+            {
+                g_errorHandler(bleData->remoteEndpoint,
+                               bleData->data,
+                               bleData->dataLen,
+                               result);
+            }
             return;
         }
 
         OIC_LOG_V(DEBUG,
                   CALEADAPTER_TAG,
-                  "Server Sent data length [%u]",
+                  "Server Sent Unicast First Data - data length [%u]",
                   length);
 
         result = CAGenerateHeader(dataHeader,
@@ -1166,29 +1414,32 @@ static void CALEServerSendDataThread(void *threadData)
         {
             OIC_LOG_V(ERROR, CALEADAPTER_TAG,
                       "CAGenerateHeader failed, result [%d]", result);
-            g_errorHandler(bleData->remoteEndpoint, bleData->data, bleData->dataLen, result);
+            if (g_errorHandler)
+            {
+                g_errorHandler(bleData->remoteEndpoint, bleData->data, bleData->dataLen, result);
+            }
             return;
         }
 
         for (index = 0; index < iter; index++)
         {
             // Send the remaining header.
-            OIC_LOG_V(DEBUG,
-                      CALEADAPTER_TAG,
-                      "Sending the chunk number [%u]",
-                      index);
-
             result = CAMakeRemainDataSegment(dataSegment,
+                                             g_mtuSize - CA_BLE_HEADER_SIZE,
                                              bleData->data,
-                                             CA_SUPPORTED_BLE_MTU_SIZE - CA_BLE_HEADER_SIZE,
+                                             bleData->dataLen,
                                              index,
-                                             dataHeader);
+                                             dataHeader,
+                                             g_mtuSize);
 
             if (CA_STATUS_OK != result)
             {
                 OIC_LOG_V(ERROR, CALEADAPTER_TAG,
                             "Making data segment failed, result [%d]", result);
-                g_errorHandler(bleData->remoteEndpoint, bleData->data, bleData->dataLen, result);
+                if (g_errorHandler)
+                {
+                    g_errorHandler(bleData->remoteEndpoint, bleData->data, bleData->dataLen, result);
+                }
                 return;
             }
 
@@ -1196,36 +1447,42 @@ static void CALEServerSendDataThread(void *threadData)
                 CAUpdateCharacteristicsToGattClient(
                     bleData->remoteEndpoint->addr,
                     dataSegment,
-                    CA_SUPPORTED_BLE_MTU_SIZE);
+                    g_mtuSize);
 
             if (CA_STATUS_OK != result)
             {
                 OIC_LOG_V(ERROR, CALEADAPTER_TAG,
                             "Update characteristics failed, result [%d]", result);
-                g_errorHandler(bleData->remoteEndpoint, bleData->data, bleData->dataLen, result);
+                if (g_errorHandler)
+                {
+                    g_errorHandler(bleData->remoteEndpoint, bleData->data, bleData->dataLen, result);
+                }
                 return;
             }
             OIC_LOG_V(DEBUG, CALEADAPTER_TAG, "Server Sent data length [%d]",
-                                               CA_SUPPORTED_BLE_MTU_SIZE);
+                                               g_mtuSize);
         }
 
-        if (remainingLen && (totalLength > CA_SUPPORTED_BLE_MTU_SIZE))
+        if (remainingLen && (totalLength > g_mtuSize))
         {
             // send the last segment of the data (Ex: 22 bytes of 622
             // bytes of data when MTU is 200)
-            OIC_LOG(DEBUG, CALEADAPTER_TAG, "Sending the last chunk");
-
             result = CAMakeRemainDataSegment(dataSegment,
-                                             bleData->data,
                                              remainingLen,
+                                             bleData->data,
+                                             bleData->dataLen,
                                              index,
-                                             dataHeader);
+                                             dataHeader,
+                                             g_mtuSize);
 
             if (CA_STATUS_OK != result)
             {
                 OIC_LOG_V(ERROR, CALEADAPTER_TAG,
                             "Making data segment failed, result [%d]", result);
-                g_errorHandler(bleData->remoteEndpoint, bleData->data, bleData->dataLen, result);
+                if (g_errorHandler)
+                {
+                    g_errorHandler(bleData->remoteEndpoint, bleData->data, bleData->dataLen, result);
+                }
                 return;
             }
 
@@ -1240,126 +1497,77 @@ static void CALEServerSendDataThread(void *threadData)
                           CALEADAPTER_TAG,
                           "Update characteristics failed, result [%d]",
                           result);
-                g_errorHandler(bleData->remoteEndpoint,
-                               bleData->data,
-                               bleData->dataLen,
-                               result);
+                if (g_errorHandler)
+                {
+                    g_errorHandler(bleData->remoteEndpoint,
+                                   bleData->data,
+                                   bleData->dataLen,
+                                   result);
+                }
                 return;
             }
-            OIC_LOG_V(DEBUG, CALEADAPTER_TAG,
-                      "Server Sent data length [%d]", remainingLen + CA_BLE_HEADER_SIZE);
+            OIC_LOG_V(DEBUG,
+                      CALEADAPTER_TAG,
+                      "Server Sent Unicast Last Data - data length [%zu]",
+                      remainingLen + CA_BLE_HEADER_SIZE);
         }
      }
     else
     {
         OIC_LOG(DEBUG, CALEADAPTER_TAG, "Server Sending Multicast data");
-        result = CAUpdateCharacteristicsToAllGattClients(dataSegment, length);
-        if (CA_STATUS_OK != result)
-        {
-            OIC_LOG_V(ERROR, CALEADAPTER_TAG, "Update characteristics failed, result [%d]",
-                      result);
-            CALEErrorHandler(NULL, bleData->data, bleData->dataLen, result);
-            return;
-        }
-        OIC_LOG_V(DEBUG, CALEADAPTER_TAG, "Server Sent data length [%d]", length);
-
-        result = CAGenerateHeader(dataHeader,
-                                  CA_BLE_PACKET_NOT_START,
-                                  g_localBLESourcePort,
-                                  secureFlag,
-                                  CA_BLE_MULTICAST_PORT);
-
-        if (CA_STATUS_OK != result)
-        {
-            OIC_LOG_V(ERROR, CALEADAPTER_TAG,
-                      "CAGenerateHeader failed, result [%d]", result);
-            g_errorHandler(bleData->remoteEndpoint, bleData->data, bleData->dataLen, result);
-            return;
-        }
-
-        for (index = 0; index < iter; index++)
-        {
-            // Send the remaining header.
-            OIC_LOG_V(DEBUG, CALEADAPTER_TAG, "Sending the chunk number [%d]", index);
-
-            result = CAMakeRemainDataSegment(dataSegment,
-                                             bleData->data,
-                                             CA_SUPPORTED_BLE_MTU_SIZE - CA_BLE_HEADER_SIZE,
-                                             index,
-                                             dataHeader);
-
-            if (CA_STATUS_OK != result)
-            {
-                OIC_LOG_V(ERROR, CALEADAPTER_TAG,
-                            "Making data segment failed, result [%d]", result);
-                g_errorHandler(bleData->remoteEndpoint, bleData->data, bleData->dataLen, result);
-                return;
-            }
-
-            result = CAUpdateCharacteristicsToAllGattClients(
-                         dataSegment,
-                         CA_SUPPORTED_BLE_MTU_SIZE);
-
-            if (CA_STATUS_OK != result)
-            {
-                OIC_LOG_V(ERROR, CALEADAPTER_TAG, "Update characteristics failed, result [%d]",
-                          result);
-                CALEErrorHandler(NULL, bleData->data, bleData->dataLen, result);
-                return;
-            }
-            OIC_LOG_V(DEBUG, CALEADAPTER_TAG, "Server Sent data length [%u]",
-                      CA_SUPPORTED_BLE_MTU_SIZE);
-        }
-
-        if (remainingLen && (totalLength > CA_SUPPORTED_BLE_MTU_SIZE))
-        {
-            // send the last segment of the data
-            OIC_LOG(DEBUG, CALEADAPTER_TAG, "Sending the last chunk");
-
-            result = CAMakeRemainDataSegment(dataSegment,
-                                             bleData->data,
-                                             remainingLen,
-                                             index,
-                                             dataHeader);
-
-            if (CA_STATUS_OK != result)
-            {
-                OIC_LOG_V(ERROR, CALEADAPTER_TAG,
-                            "Making data segment failed, result [%d]", result);
-                g_errorHandler(bleData->remoteEndpoint, bleData->data, bleData->dataLen, result);
-                return;
-            }
-
-            result = CAUpdateCharacteristicsToAllGattClients(
-                         dataSegment,
-                         remainingLen + CA_BLE_HEADER_SIZE);
-
-            if (CA_STATUS_OK != result)
-            {
-                OIC_LOG_V(ERROR, CALEADAPTER_TAG, "Update characteristics failed, result [%d]",
-                          result);
-                CALEErrorHandler(NULL, bleData->data, bleData->dataLen, result);
-                return;
-            }
-            OIC_LOG_V(DEBUG, CALEADAPTER_TAG,
-                      "Server Sent data length [%d]", remainingLen + CA_BLE_HEADER_SIZE);
-        }
+        OIC_LOG(DEBUG, CALEADAPTER_TAG, "BLE Multicast is not supported");
     }
 
-    OIC_LOG(DEBUG, CALEADAPTER_TAG, "OUT - CALEServerSendDataThread");
+    OIC_LOG_V(DEBUG, CALEADAPTER_TAG, "OUT %s", __func__);
 }
 
 static void CALEClientSendDataThread(void *threadData)
 {
-    OIC_LOG(DEBUG, CALEADAPTER_TAG, "IN - CALEClientSendDataThread");
+    OIC_LOG_V(DEBUG, CALEADAPTER_TAG, "IN %s", __func__);
 
     CALEData_t *bleData = (CALEData_t *) threadData;
     if (!bleData)
     {
-        OIC_LOG(DEBUG, CALEADAPTER_TAG, "Invalid bledata!");
+        OIC_LOG(ERROR, CALEADAPTER_TAG, "Invalid bledata!");
+        return;
+    }
+
+    if (!bleData->remoteEndpoint)
+    {
+        OIC_LOG(ERROR, CALEADAPTER_TAG, "Invalid endpoint of bledata!");
         return;
     }
 
+#if defined(__ANDROID__)
+    // get MTU size
+    if (false == CALEClientIsConnected(bleData->remoteEndpoint->addr))
+    {
+        // triggering to gatt connect and MTU negotiation
+        CAResult_t res = CALEClientSendNegotiationMessage(
+                bleData->remoteEndpoint->addr);
+
+        if (CA_STATUS_OK != res)
+        {
+            OIC_LOG_V(ERROR,
+                      CALEADAPTER_TAG,
+                      "CALEClientSendNegotiationMessage has failed, result [%d]",
+                      res);
+            if (g_errorHandler)
+            {
+                g_errorHandler(bleData->remoteEndpoint,
+                               bleData->data,
+                               bleData->dataLen,
+                               res);
+            }
+            return;
+        }
+    }
+#endif
+#if defined(__TIZEN__) || defined(__ANDROID__)
+    g_mtuSize = CALEClientGetMtuSize(bleData->remoteEndpoint->addr);
+#endif
+    OIC_LOG_V(INFO, CALEADAPTER_TAG, "MTU size [%d]", g_mtuSize);
+
     uint32_t midPacketCount = 0;
     size_t remainingLen = 0;
     size_t totalLength = 0;
@@ -1368,18 +1576,22 @@ static void CALEClientSendDataThread(void *threadData)
     CAResult_t result = CAGenerateVariableForFragmentation(bleData->dataLen,
                                                            &midPacketCount,
                                                            &remainingLen,
-                                                           &totalLength);
+                                                           &totalLength,
+                                                           g_mtuSize);
 
     if (CA_STATUS_OK != result)
     {
         OIC_LOG_V(ERROR, CALEADAPTER_TAG,
                   "CAGenerateVariableForFragmentation failed, result [%d]", result);
-        g_errorHandler(bleData->remoteEndpoint, bleData->data, bleData->dataLen, result);
+        if (g_errorHandler)
+        {
+            g_errorHandler(bleData->remoteEndpoint, bleData->data, bleData->dataLen, result);
+        }
         return;
     }
 
     OIC_LOG_V(DEBUG, CALEADAPTER_TAG,
-              "Packet info: data size[%d] midPacketCount[%d] remainingLen[%d] totalLength[%d]",
+              "Packet info: data size[%d] midPacketCount[%u] remainingLen[%zu] totalLength[%zu]",
               bleData->dataLen, midPacketCount, remainingLen, totalLength);
 
     uint8_t dataSegment[CA_SUPPORTED_BLE_MTU_SIZE] = {0};
@@ -1387,9 +1599,10 @@ static void CALEClientSendDataThread(void *threadData)
 
     if (NULL != bleData->remoteEndpoint) //Unicast Data
     {
-        secureFlag = bleData->remoteEndpoint->flags == CA_SECURE ?
+        secureFlag = (bleData->remoteEndpoint->flags & CA_SECURE) ?
             CA_BLE_PACKET_SECURE : CA_BLE_PACKET_NON_SECURE;
 
+        OIC_LOG_V(DEBUG, CALEADAPTER_TAG, "This Packet is secure? %d", secureFlag);
         result = CAGenerateHeader(dataHeader,
                                   CA_BLE_PACKET_START,
                                   g_localBLESourcePort,
@@ -1405,11 +1618,16 @@ static void CALEClientSendDataThread(void *threadData)
                                   CA_BLE_MULTICAST_PORT);
     }
 
+    OIC_LOG_V(INFO, CALEADAPTER_TAG, "header info: secureFlag[%X]", secureFlag);
+
     if (CA_STATUS_OK != result)
     {
         OIC_LOG_V(ERROR, CALEADAPTER_TAG,
                   "CAGenerateHeader failed, result [%d]", result);
-        g_errorHandler(bleData->remoteEndpoint, bleData->data, bleData->dataLen, result);
+        if (g_errorHandler)
+        {
+            g_errorHandler(bleData->remoteEndpoint, bleData->data, bleData->dataLen, result);
+        }
         return;
     }
 
@@ -1422,21 +1640,24 @@ static void CALEClientSendDataThread(void *threadData)
     {
         OIC_LOG_V(ERROR, CALEADAPTER_TAG,
                   "CAGenerateHeaderPayloadLength failed, result [%d]", result);
-        g_errorHandler(bleData->remoteEndpoint, bleData->data, bleData->dataLen, result);
+        if (g_errorHandler)
+        {
+            g_errorHandler(bleData->remoteEndpoint, bleData->data, bleData->dataLen, result);
+        }
         return;
     }
 
     uint32_t length = 0;
     uint32_t dataLen = 0;
-    if (CA_SUPPORTED_BLE_MTU_SIZE > totalLength)
+    if (g_mtuSize > totalLength)
     {
-        length = totalLength;
+        length = (uint32_t)totalLength;
         dataLen = bleData->dataLen;
     }
     else
     {
-        length = CA_SUPPORTED_BLE_MTU_SIZE;
-        dataLen = CA_SUPPORTED_BLE_MTU_SIZE - CA_BLE_HEADER_SIZE - CA_BLE_LENGTH_HEADER_SIZE;
+        length = g_mtuSize;
+        dataLen = g_mtuSize - CA_BLE_HEADER_SIZE - CA_BLE_LENGTH_HEADER_SIZE;
     }
 
     result = CAMakeFirstDataSegment(dataSegment,
@@ -1447,7 +1668,10 @@ static void CALEClientSendDataThread(void *threadData)
     {
         OIC_LOG_V(ERROR, CALEADAPTER_TAG,
                   "Making data segment failed, result [%d]", result);
-        g_errorHandler(bleData->remoteEndpoint, bleData->data, bleData->dataLen, result);
+        if (g_errorHandler)
+        {
+            g_errorHandler(bleData->remoteEndpoint, bleData->data, bleData->dataLen, result);
+        }
         return;
     }
 
@@ -1471,16 +1695,18 @@ static void CALEClientSendDataThread(void *threadData)
                       CALEADAPTER_TAG,
                       "Update characteristics failed, result [%d]",
                       result);
-            g_errorHandler(bleData->remoteEndpoint,
-                           bleData->data,
-                           bleData->dataLen,
-                           result);
+            if (g_errorHandler)
+            {
+                g_errorHandler(bleData->remoteEndpoint,
+                               bleData->data,
+                               bleData->dataLen,
+                               result);
+            }
             return;
         }
-
         OIC_LOG_V(DEBUG,
                   CALEADAPTER_TAG,
-                  "Client Sent Data length  is [%u]",
+                  "Client Sent Unicast First Data - data length [%u]",
                   length);
 
         result = CAGenerateHeader(dataHeader,
@@ -1493,23 +1719,31 @@ static void CALEClientSendDataThread(void *threadData)
         {
             OIC_LOG_V(ERROR, CALEADAPTER_TAG,
                       "CAGenerateHeader failed, result [%d]", result);
-            g_errorHandler(bleData->remoteEndpoint, bleData->data, bleData->dataLen, result);
+            if (g_errorHandler)
+            {
+                g_errorHandler(bleData->remoteEndpoint, bleData->data, bleData->dataLen, result);
+            }
             return;
         }
 
         for (index = 0; index < iter; index++)
         {
             result = CAMakeRemainDataSegment(dataSegment,
+                                             g_mtuSize - CA_BLE_HEADER_SIZE,
                                              bleData->data,
-                                             CA_SUPPORTED_BLE_MTU_SIZE - CA_BLE_HEADER_SIZE,
+                                             bleData->dataLen,
                                              index,
-                                             dataHeader);
+                                             dataHeader,
+                                             g_mtuSize);
 
             if (CA_STATUS_OK != result)
             {
                 OIC_LOG_V(ERROR, CALEADAPTER_TAG,
                             "Making data segment failed, result [%d]", result);
-                g_errorHandler(bleData->remoteEndpoint, bleData->data, bleData->dataLen, result);
+                if (g_errorHandler)
+                {
+                    g_errorHandler(bleData->remoteEndpoint, bleData->data, bleData->dataLen, result);
+                }
                 return;
             }
 
@@ -1517,7 +1751,7 @@ static void CALEClientSendDataThread(void *threadData)
             result = CAUpdateCharacteristicsToGattServer(
                      bleData->remoteEndpoint->addr,
                      dataSegment,
-                     CA_SUPPORTED_BLE_MTU_SIZE,
+                     g_mtuSize,
                      LE_UNICAST, 0);
 
             if (CA_STATUS_OK != result)
@@ -1526,30 +1760,39 @@ static void CALEClientSendDataThread(void *threadData)
                           CALEADAPTER_TAG,
                           "Update characteristics failed, result [%d]",
                           result);
-                g_errorHandler(bleData->remoteEndpoint, bleData->data, bleData->dataLen, result);
+                if (g_errorHandler)
+                {
+                    g_errorHandler(bleData->remoteEndpoint, bleData->data, bleData->dataLen, result);
+                }
                 return;
             }
-            OIC_LOG_V(DEBUG, CALEADAPTER_TAG, "Client Sent Data length  is [%d]",
-                                               CA_SUPPORTED_BLE_MTU_SIZE);
+            OIC_LOG_V(DEBUG,
+                      CALEADAPTER_TAG,
+                      "Client Sent Unicast %d Data - data(mtu) length [%hu]",
+                      index + 1,
+                      g_mtuSize);
         }
 
-        if (remainingLen && (totalLength > CA_SUPPORTED_BLE_MTU_SIZE))
+        if (remainingLen && (totalLength > g_mtuSize))
         {
             // send the last segment of the data (Ex: 22 bytes of 622
             // bytes of data when MTU is 200)
-            OIC_LOG(DEBUG, CALEADAPTER_TAG, "Sending the last chunk");
-
             result = CAMakeRemainDataSegment(dataSegment,
-                                             bleData->data,
                                              remainingLen,
+                                             bleData->data,
+                                             bleData->dataLen,
                                              index,
-                                             dataHeader);
+                                             dataHeader,
+                                             g_mtuSize);
 
             if (CA_STATUS_OK != result)
             {
                 OIC_LOG_V(ERROR, CALEADAPTER_TAG,
                             "Making data segment failed, result [%d]", result);
-                g_errorHandler(bleData->remoteEndpoint, bleData->data, bleData->dataLen, result);
+                if (g_errorHandler)
+                {
+                    g_errorHandler(bleData->remoteEndpoint, bleData->data, bleData->dataLen, result);
+                }
                 return;
             }
 
@@ -1563,112 +1806,26 @@ static void CALEClientSendDataThread(void *threadData)
             {
                 OIC_LOG_V(ERROR, CALEADAPTER_TAG, "Update characteristics failed, result [%d]",
                                                    result);
-                g_errorHandler(bleData->remoteEndpoint, bleData->data, bleData->dataLen, result);
+                if (g_errorHandler)
+                {
+                    g_errorHandler(bleData->remoteEndpoint, bleData->data, bleData->dataLen, result);
+                }
                 return;
             }
-            OIC_LOG_V(DEBUG, CALEADAPTER_TAG,
-                      "Client Sent Data length  is [%d]", remainingLen + CA_BLE_HEADER_SIZE);
+            OIC_LOG_V(DEBUG,
+                      CALEADAPTER_TAG,
+                      "Client Sent Unicast Last Data - data length [%zu]",
+                      remainingLen + CA_BLE_HEADER_SIZE);
         }
     }
     else
     {
         //Sending Mulitcast Data
-        // Send the first segment with the header.
-        OIC_LOG(DEBUG, CALEADAPTER_TAG, "Sending Multicast Data");
-        result = CAUpdateCharacteristicsToAllGattServers(dataSegment, length);
-        if (CA_STATUS_OK != result)
-        {
-            OIC_LOG_V(ERROR, CALEADAPTER_TAG,
-                      "Update characteristics (all) failed, result [%d]", result);
-            CALEErrorHandler(NULL, bleData->data, bleData->dataLen, result);
-            return ;
-        }
-        OIC_LOG_V(DEBUG, CALEADAPTER_TAG, "Client Sent Data length  is [%d]", length);
-
-        result = CAGenerateHeader(dataHeader,
-                                  CA_BLE_PACKET_NOT_START,
-                                  g_localBLESourcePort,
-                                  secureFlag,
-                                  0);
-
-        if (CA_STATUS_OK != result)
-        {
-            OIC_LOG_V(ERROR, CALEADAPTER_TAG,
-                      "CAGenerateHeader failed, result [%d]", result);
-            g_errorHandler(bleData->remoteEndpoint, bleData->data, bleData->dataLen, result);
-            return;
-        }
-
-        // Send the remaining header.
-        for (index = 0; index < iter; index++)
-        {
-            result = CAMakeRemainDataSegment(dataSegment,
-                                             bleData->data,
-                                             CA_SUPPORTED_BLE_MTU_SIZE - CA_BLE_HEADER_SIZE,
-                                             index,
-                                             dataHeader);
-
-            if (CA_STATUS_OK != result)
-            {
-                OIC_LOG_V(ERROR, CALEADAPTER_TAG,
-                            "Making data segment failed, result [%d]", result);
-                g_errorHandler(bleData->remoteEndpoint, bleData->data, bleData->dataLen, result);
-                return;
-            }
-
-            result = CAUpdateCharacteristicsToAllGattServers(
-                         dataSegment,
-                         CA_SUPPORTED_BLE_MTU_SIZE);
-
-            if (CA_STATUS_OK != result)
-            {
-                OIC_LOG_V(ERROR, CALEADAPTER_TAG, "Update characteristics failed, result [%d]",
-                          result);
-                CALEErrorHandler(NULL, bleData->data, bleData->dataLen, result);
-                return;
-            }
-            OIC_LOG_V(DEBUG, CALEADAPTER_TAG, "Client Sent Data length  is [%d]",
-                      CA_SUPPORTED_BLE_MTU_SIZE);
-        }
-
-        if (remainingLen && (totalLength > CA_SUPPORTED_BLE_MTU_SIZE))
-        {
-            // send the last segment of the data (Ex: 22 bytes of 622
-            // bytes of data when MTU is 200)
-            OIC_LOG(DEBUG, CALEADAPTER_TAG, "Sending the last chunk");
-
-            result = CAMakeRemainDataSegment(dataSegment,
-                                             bleData->data,
-                                             remainingLen,
-                                             index,
-                                             dataHeader);
-
-            if (CA_STATUS_OK != result)
-            {
-                OIC_LOG_V(ERROR, CALEADAPTER_TAG,
-                            "Making data segment failed, result [%d]", result);
-                g_errorHandler(bleData->remoteEndpoint, bleData->data, bleData->dataLen, result);
-                return;
-            }
-
-            result =
-                CAUpdateCharacteristicsToAllGattServers(
-                    dataSegment,
-                    remainingLen + CA_BLE_HEADER_SIZE);
-
-            if (CA_STATUS_OK != result)
-            {
-                OIC_LOG_V(ERROR, CALEADAPTER_TAG,
-                          "Update characteristics (all) failed, result [%d]", result);
-                CALEErrorHandler(NULL, bleData->data, bleData->dataLen, result);
-                return;
-            }
-            OIC_LOG_V(DEBUG, CALEADAPTER_TAG,
-                      "Client Sent Data length  is [%d]", remainingLen + CA_BLE_HEADER_SIZE);
-        }
+        OIC_LOG(DEBUG, CALEADAPTER_TAG, "Client Sending Multicast Data");
+        OIC_LOG(DEBUG, CALEADAPTER_TAG, "BLE Multicast is not supported");
     }
 
-    OIC_LOG(DEBUG, CALEADAPTER_TAG, "OUT - CABLEClientSendDataThread");
+    OIC_LOG_V(DEBUG, CALEADAPTER_TAG, "OUT %s", __func__);
 }
 
 static CALEData_t *CACreateLEData(const CAEndpoint_t *remoteEndpoint,
@@ -1717,7 +1874,7 @@ static void CALEDataDestroyer(void *data, uint32_t size)
 {
     if ((size_t)size < sizeof(CALEData_t *))
     {
-        OIC_LOG_V(ERROR, CALEADAPTER_TAG,
+        OIC_LOG_V(DEBUG, CALEADAPTER_TAG,
                   "Destroy data too small %p %d", data, size);
     }
     CALEData_t *ledata = (CALEData_t *) data;
@@ -1730,7 +1887,7 @@ static void CALEDataDestroyer(void *data, uint32_t size)
 static void CALEDataReceiverHandlerSingleThread(const uint8_t *data,
                                                 uint32_t dataLen)
 {
-    OIC_LOG(DEBUG, CALEADAPTER_TAG, "IN");
+    OIC_LOG_V(DEBUG, CALEADAPTER_TAG, "IN %s", __func__);
 
     VERIFY_NON_NULL(data, CALEADAPTER_TAG, "Param data is NULL");
 
@@ -1840,15 +1997,16 @@ static void CALEDataReceiverHandlerSingleThread(const uint8_t *data,
                data + CA_BLE_HEADER_SIZE,
                dataOnlyLen);
         g_singleThreadReceiveData->recvDataLen += dataOnlyLen;
-        OIC_LOG_V(DEBUG, CALEADAPTER_TAG, "totalDatalength  [%d] received Datalen [%d]",
+        OIC_LOG_V(INFO, CALEADAPTER_TAG, "totalDatalength  [%d] received Datalen [%d]",
                 g_singleThreadReceiveData->totalDataLen, g_singleThreadReceiveData->recvDataLen);
     }
+    OIC_LOG_V(DEBUG, CALEADAPTER_TAG, "OUT %s", __func__);
 }
 
 static CAResult_t CALEServerSendDataSingleThread(const uint8_t *data,
                                                  uint32_t dataLen)
 {
-    OIC_LOG(DEBUG, CALEADAPTER_TAG, "IN");
+    OIC_LOG_V(DEBUG, CALEADAPTER_TAG, "%s", __func__);
 
     VERIFY_NON_NULL(data, CALEADAPTER_TAG, "Param data is NULL");
 
@@ -1860,7 +2018,8 @@ static CAResult_t CALEServerSendDataSingleThread(const uint8_t *data,
     CAResult_t result = CAGenerateVariableForFragmentation(dataLen,
                                                            &midPacketCount,
                                                            &remainingLen,
-                                                           &totalLength);
+                                                           &totalLength,
+                                                           g_mtuSize);
 
     if (CA_STATUS_OK != result)
     {
@@ -1908,15 +2067,15 @@ static CAResult_t CALEServerSendDataSingleThread(const uint8_t *data,
 
     uint32_t length = 0;
     uint32_t dataOnlyLen = 0;
-    if (CA_SUPPORTED_BLE_MTU_SIZE > totalLength)
+    if (g_mtuSize > totalLength)
     {
         length = totalLength;
         dataOnlyLen = dataLen;
     }
     else
     {
-        length = CA_SUPPORTED_BLE_MTU_SIZE;
-        dataOnlyLen = CA_SUPPORTED_BLE_MTU_SIZE - CA_BLE_HEADER_SIZE - CA_BLE_LENGTH_HEADER_SIZE;
+        length = g_mtuSize;
+        dataOnlyLen = g_mtuSize - CA_BLE_HEADER_SIZE - CA_BLE_LENGTH_HEADER_SIZE;
     }
 
     result = CAMakeFirstDataSegment(dataSegment,
@@ -1960,10 +2119,12 @@ static CAResult_t CALEServerSendDataSingleThread(const uint8_t *data,
     for (uint32_t iter = 0; iter < dataLimit; iter++)
     {
         result = CAMakeRemainDataSegment(dataSegment,
+                                         g_mtuSize - CA_BLE_HEADER_SIZE,
                                          data,
-                                         CA_SUPPORTED_BLE_MTU_SIZE - CA_BLE_HEADER_SIZE,
+                                         dataLen,
                                          iter,
-                                         dataHeader);
+                                         dataHeader,
+                                         g_mtuSize);
 
         if (CA_STATUS_OK != result)
         {
@@ -1974,7 +2135,7 @@ static CAResult_t CALEServerSendDataSingleThread(const uint8_t *data,
 
         result = CAUpdateCharacteristicsToAllGattClients(
                      dataSegment,
-                     CA_SUPPORTED_BLE_MTU_SIZE);
+                     g_mtuSize);
 
         if (CA_STATUS_OK != result)
         {
@@ -1985,16 +2146,18 @@ static CAResult_t CALEServerSendDataSingleThread(const uint8_t *data,
         CALEDoEvents();
     }
 
-    if (remainingLen && (totalLength > CA_SUPPORTED_BLE_MTU_SIZE))
+    if (remainingLen && (totalLength > g_mtuSize))
     {
         // send the last segment of the data
         OIC_LOG(DEBUG, CALEADAPTER_TAG, "Sending the last chunk");
 
         result = CAMakeRemainDataSegment(dataSegment,
-                                         data,
                                          remainingLen,
+                                         data,
+                                         dataLen,
                                          dataLimit,
-                                         dataHeader);
+                                         dataHeader,
+                                         g_mtuSize);
 
         if (CA_STATUS_OK != result)
         {
@@ -2021,127 +2184,83 @@ static CAResult_t CALEServerSendDataSingleThread(const uint8_t *data,
 
 static CAResult_t CAInitLEAdapterMutex()
 {
-    OIC_LOG(DEBUG, CALEADAPTER_TAG, "IN - CAInitLEAdapterMutex");
+    OIC_LOG_V(DEBUG, CALEADAPTER_TAG, "%s", __func__);
 
     if (NULL == g_bleIsServerMutex)
     {
-        g_bleIsServerMutex = ca_mutex_new();
+        g_bleIsServerMutex = oc_mutex_new();
         if (NULL == g_bleIsServerMutex)
         {
-            OIC_LOG(ERROR, CALEADAPTER_TAG, "ca_mutex_new failed");
-            return CA_STATUS_FAILED;
-        }
-    }
-
-    if (NULL == g_bleNetworkCbMutex)
-    {
-        g_bleNetworkCbMutex = ca_mutex_new();
-        if (NULL == g_bleNetworkCbMutex)
-        {
-            OIC_LOG(ERROR, CALEADAPTER_TAG, "ca_mutex_new failed");
-            CATerminateLEAdapterMutex();
+            OIC_LOG(ERROR, CALEADAPTER_TAG, "oc_mutex_new failed");
             return CA_STATUS_FAILED;
         }
     }
 
     if (NULL == g_bleLocalAddressMutex)
     {
-        g_bleLocalAddressMutex = ca_mutex_new();
+        g_bleLocalAddressMutex = oc_mutex_new();
         if (NULL == g_bleLocalAddressMutex)
         {
-            OIC_LOG(ERROR, CALEADAPTER_TAG, "ca_mutex_new failed");
-            CATerminateLEAdapterMutex();
-            return CA_STATUS_FAILED;
-        }
-    }
-
-    if (NULL == g_bleAdapterThreadPoolMutex)
-    {
-        g_bleAdapterThreadPoolMutex = ca_mutex_new();
-        if (NULL == g_bleAdapterThreadPoolMutex)
-        {
-            OIC_LOG(ERROR, CALEADAPTER_TAG, "ca_mutex_new failed");
+            OIC_LOG(ERROR, CALEADAPTER_TAG, "oc_mutex_new failed");
             CATerminateLEAdapterMutex();
             return CA_STATUS_FAILED;
         }
     }
 
-    if (NULL == g_bleClientSendDataMutex)
-    {
-        g_bleClientSendDataMutex = ca_mutex_new();
-        if (NULL == g_bleClientSendDataMutex)
-        {
-            OIC_LOG(ERROR, CALEADAPTER_TAG, "ca_mutex_new failed");
-            CATerminateLEAdapterMutex();
-            return CA_STATUS_FAILED;
-        }
-    }
+    
 
-    if (NULL == g_bleServerSendDataMutex)
+    if (NULL == g_bleServerReceiveDataMutex)
     {
-        g_bleServerSendDataMutex = ca_mutex_new();
-        if (NULL == g_bleServerSendDataMutex)
+        g_bleServerReceiveDataMutex = oc_mutex_new();
+        if (NULL == g_bleServerReceiveDataMutex)
         {
-            OIC_LOG(ERROR, CALEADAPTER_TAG, "ca_mutex_new failed");
-            CATerminateLEAdapterMutex();
+            OIC_LOG(ERROR, CALEADAPTER_TAG, "oc_mutex_new failed");
             return CA_STATUS_FAILED;
         }
     }
 
-    if (NULL == g_bleAdapterReqRespCbMutex)
+    if (NULL == g_bleClientReceiveDataMutex)
     {
-        g_bleAdapterReqRespCbMutex = ca_mutex_new();
-        if (NULL == g_bleAdapterReqRespCbMutex)
+        g_bleClientReceiveDataMutex = oc_mutex_new();
+        if (NULL == g_bleClientReceiveDataMutex)
         {
-            OIC_LOG(ERROR, CALEADAPTER_TAG, "ca_mutex_new failed");
-            CATerminateLEAdapterMutex();
+            OIC_LOG(ERROR, CALEADAPTER_TAG, "oc_mutex_new failed");
             return CA_STATUS_FAILED;
         }
     }
 
-    if (NULL == g_bleReceiveDataMutex)
+    if (NULL == g_senderInfoMutex)
     {
-        g_bleReceiveDataMutex = ca_mutex_new();
-        if (NULL == g_bleReceiveDataMutex)
+        g_senderInfoMutex = oc_mutex_new();
+        if (NULL == g_senderInfoMutex)
         {
-            OIC_LOG(ERROR, CALEADAPTER_TAG, "ca_mutex_new failed");
+            OIC_LOG(ERROR, CALEADAPTER_TAG, "oc_mutex_new failed");
             return CA_STATUS_FAILED;
         }
     }
 
-    OIC_LOG(DEBUG, CALEADAPTER_TAG, "OUT");
     return CA_STATUS_OK;
 }
 
 static void CATerminateLEAdapterMutex()
 {
-    OIC_LOG(DEBUG, CALEADAPTER_TAG, "IN - CATerminateLEAdapterMutex");
+    OIC_LOG_V(DEBUG, CALEADAPTER_TAG, "%s", __func__);
 
-    ca_mutex_free(g_bleIsServerMutex);
+    oc_mutex_free(g_bleIsServerMutex);
     g_bleIsServerMutex = NULL;
 
-    ca_mutex_free(g_bleNetworkCbMutex);
-    g_bleNetworkCbMutex = NULL;
-
-    ca_mutex_free(g_bleLocalAddressMutex);
+    
+    oc_mutex_free(g_bleLocalAddressMutex);
     g_bleLocalAddressMutex = NULL;
 
-    ca_mutex_free(g_bleAdapterThreadPoolMutex);
-    g_bleAdapterThreadPoolMutex = NULL;
-
-    ca_mutex_free(g_bleClientSendDataMutex);
-    g_bleClientSendDataMutex = NULL;
-
-    ca_mutex_free(g_bleServerSendDataMutex);
-    g_bleServerSendDataMutex = NULL;
-
-    ca_mutex_free(g_bleAdapterReqRespCbMutex);
-    g_bleAdapterReqRespCbMutex = NULL;
+    oc_mutex_free(g_bleServerReceiveDataMutex);
+    g_bleServerReceiveDataMutex = NULL;
 
-    ca_mutex_free(g_bleReceiveDataMutex);
-    g_bleReceiveDataMutex = NULL;
+    oc_mutex_free(g_bleClientReceiveDataMutex);
+    g_bleClientReceiveDataMutex = NULL;
 
-    OIC_LOG(DEBUG, CALEADAPTER_TAG, "OUT");
+    oc_mutex_free(g_senderInfoMutex);
+    g_senderInfoMutex = NULL;
 }
 
 /**
@@ -2345,9 +2464,20 @@ static CAResult_t CALEAdapterClientSendData(const CAEndpoint_t *remoteEndpoint,
 
 static CAResult_t CALEAdapterGattServerStart()
 {
-    OIC_LOG(DEBUG, CALEADAPTER_TAG, "Before CAStartLEGattServer");
+    OIC_LOG_V(DEBUG, CALEADAPTER_TAG, "%s", __func__);
+    CAResult_t result = CA_STATUS_FAILED;
+
+    if (caglobals.bleFlags & CA_LE_SERVER_DISABLE)
+    {
+        OIC_LOG_V(INFO, CALEADAPTER_TAG, "server flag of configure is disable [%d]",
+                  caglobals.bleFlags);
+        return CA_STATUS_OK;
+    }
 
-    CAResult_t result = CAStartLEGattServer();
+#ifndef DISABLE_BLE_SERVER
+    OIC_LOG_V(INFO, CALEADAPTER_TAG, "Starting LE GATT Server");
+    result = CAStartLEGattServer();
+#endif
 
 #ifndef SINGLE_THREAD
     /*
@@ -2356,10 +2486,7 @@ static CAResult_t CALEAdapterGattServerStart()
     */
     if (CA_STATUS_OK == result)
     {
-        ca_mutex_lock(g_bleServerSendDataMutex);
         result = CAQueueingThreadStart(g_bleServerSendQueueHandle);
-        ca_mutex_unlock(g_bleServerSendDataMutex);
-
         if (CA_STATUS_OK != result)
         {
             OIC_LOG_V(ERROR,
@@ -2375,18 +2502,29 @@ static CAResult_t CALEAdapterGattServerStart()
 
 static CAResult_t CALEAdapterGattServerStop()
 {
+    OIC_LOG_V(DEBUG, CALEADAPTER_TAG, "%s", __func__);
+
+    if (caglobals.bleFlags & CA_LE_SERVER_DISABLE)
+    {
+        OIC_LOG_V(INFO, CALEADAPTER_TAG, "server flag of configure is disable [%d]",
+                  caglobals.bleFlags);
+        return CA_STATUS_OK;
+    }
+
 #ifndef SINGLE_THREAD
-    OIC_LOG(DEBUG, CALEADAPTER_TAG, "CALEAdapterGattServerStop");
 
-    CAResult_t result = CAStopLEGattServer();
-    ca_mutex_lock(g_bleServerSendDataMutex);
-    if (CA_STATUS_OK == result)
+    CAResult_t res = CAQueueingThreadStop(g_bleServerSendQueueHandle);
+    if (CA_STATUS_OK != res)
+    {
+        OIC_LOG(ERROR, CALEADAPTER_TAG, "CAQueueingThreadStop has failed");
+    }
+    res = CAStopLEGattServer();
+    if (CA_STATUS_OK != res)
     {
-        result = CAQueueingThreadStop(g_bleServerSendQueueHandle);
+        OIC_LOG(ERROR, CALEADAPTER_TAG, "CAStopLEGattServer has failed");
     }
-    ca_mutex_unlock(g_bleServerSendDataMutex);
 
-    return result;
+    return res;
 #else
     return CAStopLEGattServer();
 #endif
@@ -2394,7 +2532,7 @@ static CAResult_t CALEAdapterGattServerStop()
 
 static CAResult_t CALEAdapterGattClientStart()
 {
-    OIC_LOG(DEBUG, CALEADAPTER_TAG, "Before CAStartLEGattClient");
+    OIC_LOG_V(DEBUG, CALEADAPTER_TAG, "%s", __func__);
 
     CAResult_t result = CAStartLEGattClient();
 
@@ -2405,10 +2543,7 @@ static CAResult_t CALEAdapterGattClientStart()
     */
     if (CA_STATUS_OK == result)
     {
-        ca_mutex_lock(g_bleClientSendDataMutex);
         result = CAQueueingThreadStart(g_bleClientSendQueueHandle);
-        ca_mutex_unlock(g_bleClientSendDataMutex);
-
         if (CA_STATUS_OK != result)
         {
             OIC_LOG(ERROR,
@@ -2424,13 +2559,11 @@ static CAResult_t CALEAdapterGattClientStart()
 static CAResult_t CALEAdapterGattClientStop()
 {
 #ifndef SINGLE_THREAD
-    OIC_LOG(DEBUG, CALEADAPTER_TAG, "CALEAdapterGattClientStop");
+    OIC_LOG_V(DEBUG, CALEADAPTER_TAG, "%s", __func__);
     CAStopLEGattClient();
 
-    ca_mutex_lock(g_bleClientSendDataMutex);
     CAResult_t result = CAQueueingThreadStop(g_bleClientSendQueueHandle);
-    ca_mutex_unlock(g_bleClientSendDataMutex);
-
+    
     return result;
 #else
     CAStopLEGattClient();
@@ -2439,6 +2572,98 @@ static CAResult_t CALEAdapterGattClientStop()
 #endif
 }
 
+#ifdef __WITH_DTLS__
+static ssize_t CALESecureSendDataCB(CAEndpoint_t *endpoint, const void *data, size_t dataLen)
+{
+    VERIFY_NON_NULL(endpoint, CALEADAPTER_TAG, "endpoint is NULL");
+    VERIFY_NON_NULL(data, CALEADAPTER_TAG, "data is NULL");
+    OIC_LOG_V(DEBUG, CALEADAPTER_TAG, "IN %s", __func__);
+    OIC_LOG_V(DEBUG, CALEADAPTER_TAG, "encrypted datalen = %zd", dataLen);
+
+    CAResult_t result;
+    CADataType_t dataType = g_dataType;
+    ssize_t ret = 0;
+
+    if (ADAPTER_SERVER == g_adapterType ||
+            (ADAPTER_BOTH_CLIENT_SERVER == g_adapterType && CA_RESPONSE_DATA == dataType))
+    {
+        result = CALEAdapterServerSendData(endpoint, data, dataLen);
+        if (CA_STATUS_OK != result)
+        {
+            OIC_LOG(ERROR, CALEADAPTER_TAG, "Send unicast data for server failed" );
+
+             if (g_errorHandler)
+             {
+                 g_errorHandler(endpoint, data, dataLen, result);
+             }
+             return ret;
+        }
+        ret = (ssize_t)dataLen;
+    }
+    else if (ADAPTER_CLIENT == g_adapterType ||
+            (ADAPTER_BOTH_CLIENT_SERVER == g_adapterType && CA_REQUEST_DATA == dataType) ||
+            (ADAPTER_BOTH_CLIENT_SERVER == g_adapterType && CA_RESPONSE_FOR_RES == dataType))
+    {
+        result = CALEAdapterClientSendData(endpoint, data, dataLen);
+        if (CA_STATUS_OK != result)
+        {
+            OIC_LOG(ERROR, CALEADAPTER_TAG, "Send unicast data for client failed" );
+
+             if (g_errorHandler)
+             {
+                 g_errorHandler(endpoint, data, dataLen, result);
+             }
+             return ret;
+        }
+        ret = (ssize_t)dataLen;
+    }
+    else
+    {
+        OIC_LOG_V(ERROR, CALEADAPTER_TAG,
+                  "Can't Send Message adapterType = %d, dataType = %d", g_adapterType, dataType);
+        return ret;
+    }
+    OIC_LOG_V(DEBUG, CALEADAPTER_TAG, "OUT %s", __func__);
+    return ret;
+}
+
+CAResult_t CALESecureReceiveDataCB(const CASecureEndpoint_t *sep, const void *data,
+                          size_t dataLen)
+{
+    OIC_LOG_V(DEBUG, CALEADAPTER_TAG, "%s", __func__);
+
+    VERIFY_NON_NULL(sep, CALEADAPTER_TAG, "sep is NULL");
+    VERIFY_NON_NULL(data, CALEADAPTER_TAG, "data is NULL");
+
+    OIC_LOG_V(DEBUG, CALEADAPTER_TAG,
+              "Secure Data Receive - decrypted datalen = %zd", dataLen);
+
+    if (dataLen <= 0)
+    {
+        OIC_LOG(ERROR, CALEADAPTER_TAG, "incorrect dataLen, derecypt fail !");
+        return CA_STATUS_INVALID_PARAM;
+    }
+
+    OIC_LOG_BUFFER(DEBUG, CALEADAPTER_TAG, data, dataLen);
+
+    CAResult_t res = CA_STATUS_OK;
+    if (g_networkPacketReceivedCallback)
+    {
+        OIC_LOG_V(DEBUG, CALEADAPTER_TAG,
+                  "[CALESecureReceiveDataCB] Secure flags = %d, %x",
+                  sep->endpoint.flags, sep->endpoint.flags);
+        OIC_LOG(DEBUG, CALEADAPTER_TAG,
+                  "[CALESecureReceiveDataCB] Received data up !");
+        res = g_networkPacketReceivedCallback(sep, data, dataLen);
+        if (CA_STATUS_OK != res)
+        {
+            OIC_LOG_V(ERROR, CALEADAPTER_TAG, "Error parsing CoAP data, res = %d", res);
+        }
+    }
+    return res;
+}
+#endif
+
 CAResult_t CAInitializeLE(CARegisterConnectivityCallback registerCallback,
                           CANetworkPacketReceivedCallback reqRespCallback,
                           CAAdapterChangeCallback netCallback,
@@ -2446,7 +2671,7 @@ CAResult_t CAInitializeLE(CARegisterConnectivityCallback registerCallback,
                           CAErrorHandleCallback errorCallback,
                           ca_thread_pool_t handle)
 {
-    OIC_LOG(DEBUG, CALEADAPTER_TAG, "IN");
+    OIC_LOG_V(DEBUG, CALEADAPTER_TAG, "%s", __func__);
 
     //Input validation
     VERIFY_NON_NULL(registerCallback, CALEADAPTER_TAG, "RegisterConnectivity callback is null");
@@ -2470,8 +2695,6 @@ CAResult_t CAInitializeLE(CARegisterConnectivityCallback registerCallback,
     }
     CAInitializeLEAdapter();
 
-    CASetLEClientThreadPoolHandle(handle);
-
     result = CAInitializeLEGattClient();
     if (CA_STATUS_OK != result)
     {
@@ -2479,6 +2702,8 @@ CAResult_t CAInitializeLE(CARegisterConnectivityCallback registerCallback,
         return CA_STATUS_FAILED;
     }
 
+    CASetLEClientThreadPoolHandle(handle);
+
     CASetLEReqRespClientCallback(CALEAdapterClientReceivedData);
     CASetLEServerThreadPoolHandle(handle);
     result = CAInitializeLEGattServer();
@@ -2498,6 +2723,18 @@ CAResult_t CAInitializeLE(CARegisterConnectivityCallback registerCallback,
 
     g_errorHandler = errorCallback;
 
+#ifdef __WITH_DTLS__
+     if (CA_STATUS_OK != CAinitSslAdapter())
+    {
+        OIC_LOG(ERROR, CALEADAPTER_TAG, "Failed to init SSL adapter");
+    }
+    else
+    {
+        CAsetSslAdapterCallbacks(CALESecureReceiveDataCB, CALESecureSendDataCB,
+                                 CA_ADAPTER_GATT_BTLE);
+    }
+#endif
+
     static const CAConnectivityHandler_t connHandler =
         {
             .startAdapter = CAStartLE,
@@ -2514,27 +2751,22 @@ CAResult_t CAInitializeLE(CARegisterConnectivityCallback registerCallback,
         };
 
     registerCallback(connHandler);
-
-    OIC_LOG(DEBUG, CALEADAPTER_TAG, "OUT");
-
     return CA_STATUS_OK;
 }
 
 static CAResult_t CAStartLE()
 {
-    OIC_LOG(DEBUG, CALEADAPTER_TAG, "CAStartLE");
-
     return CAStartLEAdapter();
 }
 
 static CAResult_t CAStopLE()
 {
-    OIC_LOG(DEBUG, CALEADAPTER_TAG, "IN");
+
 #ifndef SINGLE_THREAD
     CAStopLEQueues();
 #endif
 
-    ca_mutex_lock(g_bleIsServerMutex);
+    oc_mutex_lock(g_bleIsServerMutex);
     switch (g_adapterType)
     {
         case ADAPTER_SERVER:
@@ -2550,16 +2782,13 @@ static CAResult_t CAStopLE()
         default:
             break;
     }
-    ca_mutex_unlock(g_bleIsServerMutex);
-
-    OIC_LOG(DEBUG, CALEADAPTER_TAG, "OUT");
-
+    oc_mutex_unlock(g_bleIsServerMutex);
     return CAStopLEAdapter();
 }
 
 static void CATerminateLE()
 {
-    OIC_LOG(DEBUG, CALEADAPTER_TAG, "IN");
+    OIC_LOG_V(DEBUG, CALEADAPTER_TAG, "%s", __func__);
 
     CASetLEReqRespServerCallback(NULL);
     CASetLEReqRespClientCallback(NULL);
@@ -2567,7 +2796,7 @@ static void CATerminateLE()
     CASetLEReqRespAdapterCallback(NULL);
     CATerminateLENetworkMonitor();
 
-    ca_mutex_lock(g_bleIsServerMutex);
+    oc_mutex_lock(g_bleIsServerMutex);
     switch (g_adapterType)
     {
         case ADAPTER_SERVER:
@@ -2584,19 +2813,30 @@ static void CATerminateLE()
             break;
     }
     g_adapterType = ADAPTER_EMPTY;
-    ca_mutex_unlock(g_bleIsServerMutex);
+    oc_mutex_unlock(g_bleIsServerMutex);
 
 #ifndef SINGLE_THREAD
     CATerminateLEQueues();
 #endif
-    CATerminateLEAdapterMutex();
 
-    OIC_LOG(DEBUG, CALEADAPTER_TAG, "OUT");
+#ifdef __WITH_DTLS__
+    CAsetSslAdapterCallbacks(NULL, NULL, CA_ADAPTER_GATT_BTLE);
+#endif
+
+    CATerminateLEAdapterMutex();
 }
 
 static CAResult_t CAStartLEListeningServer()
 {
-    OIC_LOG(DEBUG, CALEADAPTER_TAG, "IN - CAStartLEListeningServer");
+    OIC_LOG_V(DEBUG, CALEADAPTER_TAG, "IN %s", __func__);
+
+    if (caglobals.bleFlags & CA_LE_SERVER_DISABLE)
+    {
+        OIC_LOG_V(INFO, CALEADAPTER_TAG, "server flag of configure is disable [%d]",
+                  caglobals.bleFlags);
+        return CA_STATUS_OK;
+    }
+
 #ifndef ROUTING_GATEWAY
     CAResult_t result = CA_STATUS_OK;
 #ifndef SINGLE_THREAD
@@ -2608,7 +2848,7 @@ static CAResult_t CAStartLEListeningServer()
     }
 #endif
 
-    ca_mutex_lock(g_bleIsServerMutex);
+    oc_mutex_lock(g_bleIsServerMutex);
     switch (g_adapterType)
     {
         case ADAPTER_CLIENT:
@@ -2619,7 +2859,7 @@ static CAResult_t CAStartLEListeningServer()
         default:
             g_adapterType = ADAPTER_SERVER;
     }
-    ca_mutex_unlock(g_bleIsServerMutex);
+    oc_mutex_unlock(g_bleIsServerMutex);
 
     result = CAGetLEAdapterState();
     if (CA_STATUS_OK != result)
@@ -2637,7 +2877,7 @@ static CAResult_t CAStartLEListeningServer()
         result = CALEAdapterGattServerStart();
     }
 
-    OIC_LOG(DEBUG, CALEADAPTER_TAG, "OUT");
+    OIC_LOG_V(DEBUG, CALEADAPTER_TAG, "OUT %s", __func__);
     return result;
 #else
     // Routing Gateway only supports BLE client mode.
@@ -2654,7 +2894,7 @@ static CAResult_t CAStopLEListeningServer()
 
 static CAResult_t CAStartLEDiscoveryServer()
 {
-    OIC_LOG(DEBUG, CALEADAPTER_TAG, "IN - CAStartLEDiscoveryServer");
+    OIC_LOG_V(DEBUG, CALEADAPTER_TAG, "IN %s", __func__);
     CAResult_t result = CA_STATUS_OK;
 #ifndef SINGLE_THREAD
     result = CAInitLEClientQueues();
@@ -2665,7 +2905,7 @@ static CAResult_t CAStartLEDiscoveryServer()
     }
 #endif
 
-    ca_mutex_lock(g_bleIsServerMutex);
+    oc_mutex_lock(g_bleIsServerMutex);
     switch (g_adapterType)
     {
         case ADAPTER_SERVER:
@@ -2676,7 +2916,7 @@ static CAResult_t CAStartLEDiscoveryServer()
         default:
             g_adapterType = ADAPTER_CLIENT;
     }
-    ca_mutex_unlock(g_bleIsServerMutex);
+    oc_mutex_unlock(g_bleIsServerMutex);
 
     result = CAGetLEAdapterState();
     if (CA_STATUS_OK != result)
@@ -2694,17 +2934,15 @@ static CAResult_t CAStartLEDiscoveryServer()
         result = CALEAdapterGattClientStart();
     }
 
-    OIC_LOG(DEBUG, CALEADAPTER_TAG, "OUT");
+    OIC_LOG_V(DEBUG, CALEADAPTER_TAG, "OUT %s", __func__);
     return result;
 }
 
 static CAResult_t CAReadLEData()
 {
-    OIC_LOG(DEBUG, CALEADAPTER_TAG, "IN");
 #ifdef SINGLE_THREAD
     CACheckLEData();
 #endif
-    OIC_LOG(DEBUG, CALEADAPTER_TAG, "OUT");
     return CA_STATUS_OK;
 }
 
@@ -2713,7 +2951,8 @@ static int32_t CASendLEUnicastData(const CAEndpoint_t *endpoint,
                                    uint32_t dataLen,
                                    CADataType_t dataType)
 {
-    OIC_LOG_V(DEBUG, CALEADAPTER_TAG, "IN - CASendLEUnicastData : type(%d)", dataType);
+    OIC_LOG_V(DEBUG, CALEADAPTER_TAG, "IN %s", __func__);
+    OIC_LOG_V(DEBUG, CALEADAPTER_TAG, "type(%d)", dataType);
 
     //Input validation
     VERIFY_NON_NULL_RET(endpoint, CALEADAPTER_TAG, "Remote endpoint is null", -1);
@@ -2727,14 +2966,39 @@ static int32_t CASendLEUnicastData(const CAEndpoint_t *endpoint,
         OIC_LOG(ERROR, CALEADAPTER_TAG, "g_adapterType is Empty");
     }
 
-    ca_mutex_lock(g_bleIsServerMutex);
+    oc_mutex_lock(g_bleIsServerMutex);
     if (ADAPTER_SERVER == g_adapterType ||
             (ADAPTER_BOTH_CLIENT_SERVER == g_adapterType && CA_RESPONSE_DATA == dataType))
     {
+#ifdef __WITH_DTLS__
+        if (endpoint && endpoint->flags & CA_SECURE)
+        {
+            OIC_LOG(DEBUG, CALEADAPTER_TAG,
+                    "Response Data or server - secured data send(caadapternetdtlsencrypt) call");
+            OIC_LOG_BUFFER(DEBUG, CALEADAPTER_TAG, data, dataLen);
+            g_dataType = dataType;
+            oc_mutex_unlock(g_bleIsServerMutex);
+
+            result = CAencryptSsl(endpoint, (void *)data, dataLen);
+            if (CA_STATUS_OK != result)
+            {
+                OIC_LOG(ERROR, CALEADAPTER_TAG, "caadapternetdtlsencrypt failed!");
+                return -1;
+            }
+            return dataLen;
+        }
+        else
+        {
+            OIC_LOG(DEBUG, CALEADAPTER_TAG,
+                    "server or both - none secured data send(CALEAdapterServerSendData) call");
+            result = CALEAdapterServerSendData(endpoint, data, dataLen);
+        }
+#else
         result = CALEAdapterServerSendData(endpoint, data, dataLen);
+#endif
         if (CA_STATUS_OK != result)
         {
-            ca_mutex_unlock(g_bleIsServerMutex);
+            oc_mutex_unlock(g_bleIsServerMutex);
             OIC_LOG(ERROR, CALEADAPTER_TAG, "Send unicast data for server failed");
             if (g_errorHandler)
             {
@@ -2744,27 +3008,51 @@ static int32_t CASendLEUnicastData(const CAEndpoint_t *endpoint,
             return -1;
         }
     }
-
-    if (ADAPTER_CLIENT == g_adapterType ||
+    else if (ADAPTER_CLIENT == g_adapterType ||
             (ADAPTER_BOTH_CLIENT_SERVER == g_adapterType && CA_REQUEST_DATA == dataType) ||
             (ADAPTER_BOTH_CLIENT_SERVER == g_adapterType && CA_RESPONSE_FOR_RES == dataType))
     {
+#ifdef __WITH_DTLS__
+        if (endpoint && endpoint->flags & CA_SECURE)
+        {
+            OIC_LOG(DEBUG, CALEADAPTER_TAG,
+                    "Request Data or client - secured data send(caadapternetdtlsencrypt) call");
+            OIC_LOG_BUFFER(DEBUG, CALEADAPTER_TAG, data, dataLen);
+            g_dataType = dataType;
+            oc_mutex_unlock(g_bleIsServerMutex);
+
+            result = CAencryptSsl(endpoint, (void *)data, dataLen);
+            if (CA_STATUS_OK != result)
+            {
+                OIC_LOG(ERROR, CALEADAPTER_TAG, "caadapternetdtlsencrypt failed!");
+                return -1;
+            }
+            return dataLen;
+        }
+        else
+        {
+            OIC_LOG(DEBUG, CALEADAPTER_TAG,
+                    "client or both - none secured data send(CALEAdapterClientSendData) call");
+            result = CALEAdapterClientSendData(endpoint, data, dataLen);
+        }
+#else
         result = CALEAdapterClientSendData(endpoint, data, dataLen);
+#endif
         if (CA_STATUS_OK != result)
         {
-            ca_mutex_unlock(g_bleIsServerMutex);
+            oc_mutex_unlock(g_bleIsServerMutex);
             OIC_LOG(ERROR, CALEADAPTER_TAG, "Send unicast data for client failed" );
 
-             if (g_errorHandler)
-             {
-                 g_errorHandler(endpoint, data, dataLen, result);
-             }
+            if (g_errorHandler)
+            {
+                g_errorHandler(endpoint, data, dataLen, result);
+            }
             return -1;
         }
     }
-    ca_mutex_unlock(g_bleIsServerMutex);
+    oc_mutex_unlock(g_bleIsServerMutex);
 
-    OIC_LOG(DEBUG, CALEADAPTER_TAG, "OUT");
+    OIC_LOG_V(DEBUG, CALEADAPTER_TAG, "OUT %s", __func__);
     return dataLen;
 }
 
@@ -2773,7 +3061,7 @@ static int32_t CASendLEMulticastData(const CAEndpoint_t *endpoint,
                                      uint32_t dataLen,
                                      CADataType_t dataType)
 {
-    OIC_LOG(DEBUG, CALEADAPTER_TAG, "IN - CASendLEMulticastData");
+    OIC_LOG_V(DEBUG, CALEADAPTER_TAG, "IN %s", __func__);
 
     //Input validation
     VERIFY_NON_NULL_RET(data, CALEADAPTER_TAG, "Data is null", -1);
@@ -2792,14 +3080,14 @@ static int32_t CASendLEMulticastData(const CAEndpoint_t *endpoint,
         OIC_LOG(ERROR, CALEADAPTER_TAG, "g_adapterType is Empty");
     }
 
-    ca_mutex_lock(g_bleIsServerMutex);
+    oc_mutex_lock(g_bleIsServerMutex);
     if (ADAPTER_SERVER == g_adapterType ||
             (ADAPTER_BOTH_CLIENT_SERVER == g_adapterType && CA_RESPONSE_DATA == dataType))
     {
         result = CALEAdapterServerSendData(NULL, data, dataLen);
         if (CA_STATUS_OK != result)
         {
-            ca_mutex_unlock(g_bleIsServerMutex);
+            oc_mutex_unlock(g_bleIsServerMutex);
 
             OIC_LOG(ERROR, CALEADAPTER_TAG, "Send multicast data for server failed" );
 
@@ -2818,7 +3106,7 @@ static int32_t CASendLEMulticastData(const CAEndpoint_t *endpoint,
         result = CALEAdapterClientSendData(NULL, data, dataLen);
         if (CA_STATUS_OK != result)
         {
-            ca_mutex_unlock(g_bleIsServerMutex);
+            oc_mutex_unlock(g_bleIsServerMutex);
 
             OIC_LOG(ERROR, CALEADAPTER_TAG, "Send Multicast data for client failed" );
 
@@ -2829,15 +3117,15 @@ static int32_t CASendLEMulticastData(const CAEndpoint_t *endpoint,
             return -1;
         }
     }
-    ca_mutex_unlock(g_bleIsServerMutex);
+    oc_mutex_unlock(g_bleIsServerMutex);
 
-    OIC_LOG(DEBUG, CALEADAPTER_TAG, "OUT - CASendLEMulticastData");
+    OIC_LOG_V(DEBUG, CALEADAPTER_TAG, "OUT %s", __func__);
     return dataLen;
 }
 
 static CAResult_t CAGetLEInterfaceInformation(CAEndpoint_t **info, uint32_t *size)
 {
-    OIC_LOG(DEBUG, CALEADAPTER_TAG, "IN");
+    OIC_LOG_V(DEBUG, CALEADAPTER_TAG, "IN %s", __func__);
 
     VERIFY_NON_NULL(info, CALEADAPTER_TAG, "CALocalConnectivity info is null");
 
@@ -2877,27 +3165,25 @@ static CAResult_t CAGetLEInterfaceInformation(CAEndpoint_t **info, uint32_t *siz
     }
 
     OICStrcpy((*info)->addr, sizeof((*info)->addr), local_address);
-    ca_mutex_lock(g_bleLocalAddressMutex);
+    oc_mutex_lock(g_bleLocalAddressMutex);
     OICStrcpy(g_localBLEAddress, sizeof(g_localBLEAddress), local_address);
-    ca_mutex_unlock(g_bleLocalAddressMutex);
+    oc_mutex_unlock(g_bleLocalAddressMutex);
 
     (*info)->adapter = CA_ADAPTER_GATT_BTLE;
     *size = 1;
     OICFree(local_address);
 
-    OIC_LOG(DEBUG, CALEADAPTER_TAG, "OUT");
+    OIC_LOG_V(DEBUG, CALEADAPTER_TAG, "OUT %s", __func__);
     return CA_STATUS_OK;
 }
 
 static CAResult_t CALERegisterNetworkNotifications(CAAdapterChangeCallback netCallback,
                                                    CAConnectionChangeCallback connCallback)
 {
-    OIC_LOG(DEBUG, CALEADAPTER_TAG, "IN");
+    OIC_LOG_V(DEBUG, CALEADAPTER_TAG, "IN %s", __func__);
 
-    ca_mutex_lock(g_bleNetworkCbMutex);
     g_networkCallback = netCallback;
     g_connectionCallback = connCallback;
-    ca_mutex_unlock(g_bleNetworkCbMutex);
     CAResult_t res = CA_STATUS_OK;
     if (netCallback)
     {
@@ -2924,21 +3210,32 @@ static CAResult_t CALERegisterNetworkNotifications(CAAdapterChangeCallback netCa
             OIC_LOG(ERROR, CALEADAPTER_TAG, "CASetLENWConnectionStateChangedCb failed!");
         }
     }
+    else
+    {
+        res = CAUnSetLENWConnectionStateChangedCb();
+        if (CA_STATUS_OK != res)
+        {
+            OIC_LOG(ERROR, CALEADAPTER_TAG, "CAUnSetLENWConnectionStateChangedCb failed!");
+        }
+    }
 
-    OIC_LOG(DEBUG, CALEADAPTER_TAG, "OUT");
+    OIC_LOG_V(DEBUG, CALEADAPTER_TAG, "OUT %s", __func__);
     return res;
 }
 
 static void CALEConnectionStateChangedCb(CATransportAdapter_t adapter, const char* address,
                                          bool isConnected)
 {
-    OIC_LOG(DEBUG, CALEADAPTER_TAG, "IN - CALEConnectionStateChangedCb");
+    OIC_LOG_V(DEBUG, CALEADAPTER_TAG, "IN %s", __func__);
 
     VERIFY_NON_NULL_VOID(address, CALEADAPTER_TAG, "address");
     (void)adapter;
 
+    CAEndpoint_t localEndpoint = { .adapter = CA_ADAPTER_GATT_BTLE };
+    OICStrcpy(localEndpoint.addr, sizeof(localEndpoint.addr), address);
+
 #ifdef __TIZEN__
-    ca_mutex_lock(g_bleIsServerMutex);
+    oc_mutex_lock(g_bleIsServerMutex);
     switch (g_adapterType)
     {
         case ADAPTER_SERVER:
@@ -2954,7 +3251,7 @@ static void CALEConnectionStateChangedCb(CATransportAdapter_t adapter, const cha
         default:
             break;
     }
-    ca_mutex_unlock(g_bleIsServerMutex);
+    oc_mutex_unlock(g_bleIsServerMutex);
 #endif
 
     if(!isConnected)
@@ -2973,40 +3270,81 @@ static void CALEConnectionStateChangedCb(CATransportAdapter_t adapter, const cha
         // remove data of send queue.
         if (g_bleClientSendQueueHandle)
         {
-            CALERemoveSendQueueData(g_bleClientSendQueueHandle,
-                                    g_bleClientSendDataMutex,
-                                    address);
+            CALERemoveSendQueueData(g_bleClientSendQueueHandle, address);
         }
 
         if (g_bleServerSendQueueHandle)
         {
-            CALERemoveSendQueueData(g_bleServerSendQueueHandle,
-                                    g_bleServerSendDataMutex,
-                                    address);
+            CALERemoveSendQueueData(g_bleServerSendQueueHandle, address);
         }
 #endif
-    }
 
-    CAEndpoint_t localEndpoint = { .adapter = CA_ADAPTER_GATT_BTLE };
-    OICStrcpy(localEndpoint.addr, sizeof(localEndpoint.addr), address);
+#ifdef __WITH_DTLS__
+#if defined(__TIZEN__) && !defined(SINGLE_THREAD)
+        // CAcloseSslConnection returns CAResult_t instead of void*, but the size is the same and crash shouldn't occur
+        pthread_t ccThread;
+        pthread_attr_t attr;
+        int initAttrRes = -1;
+        int pthreadCreateRes = -1;
+        int detachStatusRes = -1;
+        int memoryAllocationRes = -1;
+
+        do
+        {
+            initAttrRes = pthread_attr_init(&attr);
+            if (initAttrRes != 0)
+            {
+                break;
+            }
+            CAEndpoint_t *localEndpointCpyPtr = OICMalloc(sizeof(CAEndpoint_t));
+
+            if(NULL == localEndpointCpyPtr)
+            {
+                memoryAllocationRes = -1;
+                break;
+            }
+            else
+            {
+                memoryAllocationRes = 0;
+            }
+
+            (*localEndpointCpyPtr) = localEndpoint;
+            // this piece of code is reached on the main thread
+            // CAcloseSslConnection might wait for too long (network + mutexes) and watchdog might kill it
+            // Asynchronous call protects this function from watchdog
+            pthreadCreateRes = pthread_create(&ccThread, &attr, (void *(*)(void*))&CAcloseSslConnectionFreeEndpoint, (void*)localEndpointCpyPtr);
+
+            if (pthreadCreateRes != 0)
+            {
+                break;
+            }
+            detachStatusRes = pthread_detach(ccThread);
+        }while (0);
+
+        // regardless of CAcloseSslConnection result, the function will continue and g_connectionCallback will be called
+        OIC_LOG_V(DEBUG, CALEADAPTER_TAG, "CAcloseSslConnection pthread_init [%d], mem_alloc [%d] pthread_create [%d], pthread_detach [%d]",
+                initAttrRes, memoryAllocationRes, pthreadCreateRes, detachStatusRes);
+#else
+        CAcloseSslConnection(&localEndpoint);
+#endif
+#endif
+    }
 
-    ca_mutex_lock(g_bleNetworkCbMutex);
     if (g_connectionCallback)
     {
         g_connectionCallback(&localEndpoint, isConnected);
     }
-    ca_mutex_unlock(g_bleNetworkCbMutex);
 
-    OIC_LOG(DEBUG, CALEADAPTER_TAG, "OUT");
+    OIC_LOG_V(DEBUG, CALEADAPTER_TAG, "OUT %s", __func__);
 }
 
 static void CALEDeviceStateChangedCb(CAAdapterState_t adapter_state)
 {
-    OIC_LOG(DEBUG, CALEADAPTER_TAG, "IN - CALEDeviceStateChangedCb");
+    OIC_LOG_V(DEBUG, CALEADAPTER_TAG, "IN %s", __func__);
 
     if (CA_ADAPTER_ENABLED == adapter_state)
     {
-        ca_mutex_lock(g_bleIsServerMutex);
+        oc_mutex_lock(g_bleIsServerMutex);
         switch (g_adapterType)
         {
             case ADAPTER_SERVER:
@@ -3022,11 +3360,11 @@ static void CALEDeviceStateChangedCb(CAAdapterState_t adapter_state)
             default:
                 break;
         }
-        ca_mutex_unlock(g_bleIsServerMutex);
+        oc_mutex_unlock(g_bleIsServerMutex);
     }
     else
     {
-        ca_mutex_lock(g_bleIsServerMutex);
+        oc_mutex_lock(g_bleIsServerMutex);
         switch (g_adapterType)
         {
             case ADAPTER_SERVER:
@@ -3042,10 +3380,9 @@ static void CALEDeviceStateChangedCb(CAAdapterState_t adapter_state)
             default:
                 break;
         }
-        ca_mutex_unlock(g_bleIsServerMutex);
+        oc_mutex_unlock(g_bleIsServerMutex);
     }
 
-    ca_mutex_lock(g_bleNetworkCbMutex);
     if (NULL != g_networkCallback)
     {
         g_networkCallback(CA_ADAPTER_GATT_BTLE, adapter_state);
@@ -3054,30 +3391,20 @@ static void CALEDeviceStateChangedCb(CAAdapterState_t adapter_state)
     {
         OIC_LOG(ERROR, CALEADAPTER_TAG, "g_networkCallback is NULL");
     }
-    ca_mutex_unlock(g_bleNetworkCbMutex);
 
-    OIC_LOG(DEBUG, CALEADAPTER_TAG, "OUT");
+    OIC_LOG_V(DEBUG, CALEADAPTER_TAG, "OUT %s", __func__);
 }
 
 static CAResult_t CALEAdapterClientSendData(const CAEndpoint_t *remoteEndpoint,
                                             const uint8_t *data,
                                             uint32_t dataLen)
 {
-    OIC_LOG(DEBUG, CALEADAPTER_TAG, "IN");
-
     VERIFY_NON_NULL(data, CALEADAPTER_TAG, "Param data is NULL");
 #ifndef SINGLE_THREAD
     VERIFY_NON_NULL_RET(g_bleClientSendQueueHandle, CALEADAPTER_TAG,
                         "g_bleClientSendQueueHandle is  NULL",
                         CA_STATUS_FAILED);
-    VERIFY_NON_NULL_RET(g_bleClientSendDataMutex, CALEADAPTER_TAG,
-                        "g_bleClientSendDataMutex is NULL",
-                        CA_STATUS_FAILED);
-
-    VERIFY_NON_NULL_RET(g_bleClientSendQueueHandle, CALEADAPTER_TAG,
-                        "g_bleClientSendQueueHandle",
-                        CA_STATUS_FAILED);
-
+    
     OIC_LOG_V(DEBUG, CALEADAPTER_TAG, "Data Sending to LE layer [%u]", dataLen);
 
     CALEData_t *bleData = CACreateLEData(remoteEndpoint, data, dataLen, NULL);
@@ -3087,11 +3414,14 @@ static CAResult_t CALEAdapterClientSendData(const CAEndpoint_t *remoteEndpoint,
         return CA_MEMORY_ALLOC_FAILED;
     }
     // Add message to send queue
-    ca_mutex_lock(g_bleClientSendDataMutex);
-    CAQueueingThreadAddData(g_bleClientSendQueueHandle, bleData, sizeof(CALEData_t));
-    ca_mutex_unlock(g_bleClientSendDataMutex);
+    
+    CAResult_t res = CAQueueingThreadAddData(g_bleClientSendQueueHandle, bleData,
+                                             sizeof(CALEData_t));
+    if (CA_STATUS_OK != res)
+    {
+        CALEDataDestroyer(bleData, sizeof(CALEData_t));
+    }
 #endif
-    OIC_LOG(DEBUG, CALEADAPTER_TAG, "OUT");
     return CA_STATUS_OK;
 }
 
@@ -3099,7 +3429,7 @@ static CAResult_t CALEAdapterServerSendData(const CAEndpoint_t *remoteEndpoint,
                                             const uint8_t *data,
                                             uint32_t dataLen)
 {
-    OIC_LOG(DEBUG, CALEADAPTER_TAG, "IN");
+    OIC_LOG_V(DEBUG, CALEADAPTER_TAG, "IN %s", __func__);
 
     VERIFY_NON_NULL(data, CALEADAPTER_TAG, "Param data is NULL");
 
@@ -3118,13 +3448,7 @@ static CAResult_t CALEAdapterServerSendData(const CAEndpoint_t *remoteEndpoint,
     }
 #else
     VERIFY_NON_NULL_RET(g_bleServerSendQueueHandle, CALEADAPTER_TAG,
-                        "BleClientReceiverQueue is NULL",
-                        CA_STATUS_FAILED);
-    VERIFY_NON_NULL_RET(g_bleServerSendDataMutex, CALEADAPTER_TAG,
-                        "BleClientSendDataMutex is NULL",
-                        CA_STATUS_FAILED);
-
-    VERIFY_NON_NULL_RET(g_bleServerSendQueueHandle, CALEADAPTER_TAG, "sendQueueHandle",
+                        "g_bleServerSendQueueHandle is NULL",
                         CA_STATUS_FAILED);
 
     OIC_LOG_V(DEBUG, CALEADAPTER_TAG, "Data Sending to LE layer [%d]", dataLen);
@@ -3139,13 +3463,16 @@ static CAResult_t CALEAdapterServerSendData(const CAEndpoint_t *remoteEndpoint,
     }
 
     // Add message to send queue
-    ca_mutex_lock(g_bleServerSendDataMutex);
-    CAQueueingThreadAddData(g_bleServerSendQueueHandle,
-                            bleData,
-                            sizeof(CALEData_t));
-    ca_mutex_unlock(g_bleServerSendDataMutex);
+    
+    CAResult_t res = CAQueueingThreadAddData(g_bleServerSendQueueHandle,
+                                           bleData,
+                                           sizeof(CALEData_t));
+    if (CA_STATUS_OK != res)
+    {
+        CALEDataDestroyer(bleData, sizeof(CALEData_t));
+    }
 #endif
-    OIC_LOG(DEBUG, CALEADAPTER_TAG, "OUT");
+    OIC_LOG_V(DEBUG, CALEADAPTER_TAG, "OUT %s", __func__);
     return CA_STATUS_OK;
 }
 
@@ -3154,7 +3481,7 @@ static CAResult_t CALEAdapterServerReceivedData(const char *remoteAddress,
                                                 uint32_t dataLength,
                                                 uint32_t *sentLength)
 {
-    OIC_LOG(DEBUG, CALEADAPTER_TAG, "IN");
+    OIC_LOG_V(DEBUG, CALEADAPTER_TAG, "IN %s", __func__);
 
     //Input validation
     VERIFY_NON_NULL(data, CALEADAPTER_TAG, "Data is null");
@@ -3176,14 +3503,15 @@ static CAResult_t CALEAdapterServerReceivedData(const char *remoteAddress,
                                             g_singleThreadReceiveData->recvDataLen);
         }
         g_singleThreadReceiveData->remoteEndpoint = NULL;
+        OICFree(g_singleThreadReceiveData->defragData);
         g_singleThreadReceiveData->defragData = NULL;
         OICFree(g_singleThreadReceiveData);
         g_singleThreadReceiveData = NULL;
     }
 #else
-    VERIFY_NON_NULL_RET(g_bleReceiverQueue,
+    VERIFY_NON_NULL_RET(g_bleServerReceiverQueue,
                         CALEADAPTER_TAG,
-                        "g_bleReceiverQueue",
+                        "g_bleServerReceiverQueue",
                         CA_STATUS_FAILED);
 
     //Add message to data queue
@@ -3202,7 +3530,7 @@ static CAResult_t CALEAdapterServerReceivedData(const char *remoteAddress,
     // Create bleData to add to queue
     OIC_LOG_V(DEBUG,
               CALEADAPTER_TAG,
-              "Data received from LE layer [%d]",
+              "Data received from LE Server layer [%d]",
               dataLength);
 
     CALEData_t * const bleData =
@@ -3217,11 +3545,11 @@ static CAResult_t CALEAdapterServerReceivedData(const char *remoteAddress,
 
     CAFreeEndpoint(remoteEndpoint);
     // Add message to receiver queue
-    CAQueueingThreadAddData(g_bleReceiverQueue, bleData, sizeof(CALEData_t));
+    CAQueueingThreadAddData(g_bleServerReceiverQueue, bleData, sizeof(CALEData_t));
 
     *sentLength = dataLength;
 #endif
-    OIC_LOG(DEBUG, CALEADAPTER_TAG, "OUT");
+    OIC_LOG_V(DEBUG, CALEADAPTER_TAG, "OUT %s", __func__);
     return CA_STATUS_OK;
 }
 
@@ -3230,14 +3558,12 @@ static CAResult_t CALEAdapterClientReceivedData(const char *remoteAddress,
                                                 uint32_t dataLength,
                                                 uint32_t *sentLength)
 {
-    OIC_LOG(DEBUG, CALEADAPTER_TAG, "IN");
-
     //Input validation
     VERIFY_NON_NULL(data, CALEADAPTER_TAG, "Data is null");
     VERIFY_NON_NULL(sentLength, CALEADAPTER_TAG, "Sent data length holder is null");
 #ifndef SINGLE_THREAD
-    VERIFY_NON_NULL_RET(g_bleReceiverQueue, CALEADAPTER_TAG,
-                        "g_bleReceiverQueue",
+    VERIFY_NON_NULL_RET(g_bleClientReceiverQueue, CALEADAPTER_TAG,
+                        "g_bleClientReceiverQueue",
                         CA_STATUS_FAILED);
 
     //Add message to data queue
@@ -3250,11 +3576,15 @@ static CAResult_t CALEAdapterClientReceivedData(const char *remoteAddress,
         return CA_STATUS_FAILED;
     }
 
-    OIC_LOG_V(DEBUG, CALEADAPTER_TAG, "Data received from LE layer [%u]", dataLength);
-
     // Create bleData to add to queue
-    CALEData_t *bleData = CACreateLEData(remoteEndpoint, data,
-                                         dataLength, g_bleClientSenderInfo);
+    OIC_LOG_V(DEBUG,
+              CALEADAPTER_TAG,
+              "Data received from LE Client layer [%u]",
+              dataLength);
+
+    CALEData_t * const bleData =
+        CACreateLEData(remoteEndpoint, data, dataLength, g_bleClientSenderInfo);
+
     if (!bleData)
     {
         OIC_LOG(ERROR, CALEADAPTER_TAG, "Failed to create bledata!");
@@ -3264,36 +3594,23 @@ static CAResult_t CALEAdapterClientReceivedData(const char *remoteAddress,
 
     CAFreeEndpoint(remoteEndpoint);
     // Add message to receiver queue
-    CAQueueingThreadAddData(g_bleReceiverQueue, bleData, sizeof(CALEData_t));
+    CAQueueingThreadAddData(g_bleClientReceiverQueue, bleData, sizeof(CALEData_t));
 
     *sentLength = dataLength;
 #endif
-    OIC_LOG(DEBUG, CALEADAPTER_TAG, "OUT");
     return CA_STATUS_OK;
 }
 
 static void CASetLEAdapterThreadPoolHandle(ca_thread_pool_t handle)
 {
-    OIC_LOG(DEBUG, CALEADAPTER_TAG, "IN");
-
-    ca_mutex_lock(g_bleAdapterThreadPoolMutex);
     g_bleAdapterThreadPool = handle;
-    ca_mutex_unlock(g_bleAdapterThreadPoolMutex);
-
-    OIC_LOG(DEBUG, CALEADAPTER_TAG, "OUT");
+    
 }
 
 static void CASetLEReqRespAdapterCallback(CANetworkPacketReceivedCallback callback)
 {
-    OIC_LOG(DEBUG, CALEADAPTER_TAG, "IN");
-
-    ca_mutex_lock(g_bleAdapterReqRespCbMutex);
-
     g_networkPacketReceivedCallback = callback;
 
-    ca_mutex_unlock(g_bleAdapterReqRespCbMutex);
-
-    OIC_LOG(DEBUG, CALEADAPTER_TAG, "OUT");
 }
 
 static void CALEErrorHandler(const char *remoteAddress,
@@ -3301,7 +3618,7 @@ static void CALEErrorHandler(const char *remoteAddress,
                              uint32_t dataLen,
                              CAResult_t result)
 {
-    OIC_LOG(DEBUG, CALEADAPTER_TAG, "CALEErrorHandler IN");
+    OIC_LOG_V(DEBUG, CALEADAPTER_TAG, "IN %s", __func__);
 
     VERIFY_NON_NULL_VOID(data, CALEADAPTER_TAG, "Data is null");
 
@@ -3315,51 +3632,51 @@ static void CALEErrorHandler(const char *remoteAddress,
 
     CAFreeEndpoint(rep);
 
-    OIC_LOG(DEBUG, CALEADAPTER_TAG, "CALEErrorHandler OUT");
+    OIC_LOG_V(DEBUG, CALEADAPTER_TAG, "OUT %s", __func__);
 }
 
 #ifndef SINGLE_THREAD
-static void CALERemoveSendQueueData(CAQueueingThread_t *queueHandle, ca_mutex mutex,
-                                    const char* address)
+static bool CALEClearQueueAddressDataContext(void *data, uint32_t size, void *ctx)
 {
-    OIC_LOG(DEBUG, CALEADAPTER_TAG, "CALERemoveSendQueueData");
+    if (NULL == data || NULL == ctx)
+    {
+        return false;
+    }
 
-    VERIFY_NON_NULL_VOID(queueHandle, CALEADAPTER_TAG, "queueHandle");
-    VERIFY_NON_NULL_VOID(address, CALEADAPTER_TAG, "address");
+    CALEData_t *caLeData = (CALEData_t *)data;
+    const char *address = (const char *)ctx;
 
-    ca_mutex_lock(mutex);
-    while (u_queue_get_size(queueHandle->dataQueue) > 0)
+    if (NULL != caLeData && NULL != caLeData->remoteEndpoint)
     {
-        OIC_LOG(DEBUG, CALEADAPTER_TAG, "get data from queue");
-        u_queue_message_t *message = u_queue_get_element(queueHandle->dataQueue);
-        if (NULL != message)
+        if (!strcasecmp(caLeData->remoteEndpoint->addr, address))
         {
-            CALEData_t *bleData = (CALEData_t *) message->msg;
-            if (bleData && bleData->remoteEndpoint)
-            {
-                if (!strcmp(bleData->remoteEndpoint->addr, address))
-                {
-                    OIC_LOG(DEBUG, CALEADAPTER_TAG, "found the message of disconnected device");
-                    if (NULL != queueHandle->destroy)
-                    {
-                        queueHandle->destroy(message->msg, message->size);
-                    }
-                    else
-                    {
-                        OICFree(message->msg);
-                    }
-
-                    OICFree(message);
-                }
-            }
+            return true;
         }
     }
-    ca_mutex_unlock(mutex);
+    return false;
+}
+
+static void CALERemoveSendQueueData(CAQueueingThread_t *queueHandle, const char* address)
+{
+    OIC_LOG_V(DEBUG, CALEADAPTER_TAG, "%s", __func__);
+
+    VERIFY_NON_NULL_VOID(queueHandle, CALEADAPTER_TAG, "queueHandle");
+    VERIFY_NON_NULL_VOID(address, CALEADAPTER_TAG, "address");
+
+    CAResult_t res = CAQueueingThreadClearContextData(queueHandle,
+                                                      CALEClearQueueAddressDataContext,
+                                                      address);
+    if (CA_STATUS_OK != res)
+    {
+        
+        OIC_LOG(ERROR, CALEADAPTER_TAG, "Could not clear the send queue");
+    }
+    
 }
 
 static void CALERemoveReceiveQueueData(u_arraylist_t *dataInfoList, const char* address)
 {
-    OIC_LOG(DEBUG, CALEADAPTER_TAG, "CALERemoveReceiveQueueData");
+    OIC_LOG_V(DEBUG, CALEADAPTER_TAG, "%s", __func__);
 
     VERIFY_NON_NULL_VOID(dataInfoList, CALEADAPTER_TAG, "dataInfoList");
     VERIFY_NON_NULL_VOID(address, CALEADAPTER_TAG, "address");
@@ -3371,22 +3688,26 @@ static void CALERemoveReceiveQueueData(u_arraylist_t *dataInfoList, const char*
     if (CA_STATUS_OK == CALEGetPortsFromSenderInfo(address, dataInfoList, portList))
     {
         uint32_t arrayLength = u_arraylist_length(portList);
-        for (int i = 0; i < arrayLength; i++)
+        for (uint32_t i = 0; i < arrayLength; i++)
         {
-            uint16_t port = u_arraylist_get(portList, i);
-            OIC_LOG_V(DEBUG, CALEADAPTER_TAG, "port : %X", port);
+            uint16_t *port = (uint16_t *)u_arraylist_get(portList, i);
+            if (!port)
+            {
+                OIC_LOG(ERROR, CALEADAPTER_TAG, "Failed to get port from sender info !");
+                u_arraylist_destroy(portList);
+                return;
+            }
 
-            if (CA_STATUS_OK == CALEGetSenderInfo(address, port,
+            OIC_LOG_V(DEBUG, CALEADAPTER_TAG, "port : %X", *port);
+
+            if (CA_STATUS_OK == CALEGetSenderInfo(address, *port,
                                                   dataInfoList, &senderInfo,
                                                   &senderIndex))
             {
-                u_arraylist_remove(dataInfoList, senderIndex);
-                OICFree(senderInfo->defragData);
-                OICFree(senderInfo->remoteEndpoint);
-                OICFree(senderInfo);
-
                 OIC_LOG(DEBUG, CALEADAPTER_TAG,
                         "SenderInfo is removed for disconnection");
+                CALERemoveSenderInfoFromList(dataInfoList, senderInfo);
+                CALEFreeSenderInfo(senderInfo);
             }
             else
             {
@@ -3418,7 +3739,14 @@ static CAResult_t CALEGetPortsFromSenderInfo(const char *leAddress,
 
         if (!strncmp(info->remoteEndpoint->addr, leAddress, addrLength))
         {
-            u_arraylist_add(portList, (void *) info->remoteEndpoint->port);
+            uint16_t *port = (uint16_t *)OICMalloc(sizeof(uint16_t));
+            if (!port)
+            {
+                OIC_LOG(ERROR, CALEADAPTER_TAG, "memory allocation failed!");
+                return CA_MEMORY_ALLOC_FAILED;
+            }
+            *port = info->remoteEndpoint->port;
+            u_arraylist_add(portList, (void *)port);
         }
     }
 
@@ -3432,3 +3760,51 @@ static CAResult_t CALEGetPortsFromSenderInfo(const char *leAddress,
     }
 }
 #endif
+
+void CALEStartGattServer()
+{
+    OIC_LOG_V(DEBUG, CALEADAPTER_TAG, "IN %s", __func__);
+
+    oc_mutex_lock(g_bleIsServerMutex);
+    switch (g_adapterType)
+    {
+        case ADAPTER_SERVER:
+            CALEAdapterGattServerStart();
+             break;
+        case ADAPTER_CLIENT:
+            CALEAdapterGattClientStart();
+            break;
+        case ADAPTER_BOTH_CLIENT_SERVER:
+            CALEAdapterGattServerStart();
+            CALEAdapterGattClientStart();
+            break;
+        default:
+            break;
+    }
+    oc_mutex_unlock(g_bleIsServerMutex);
+    OIC_LOG_V(DEBUG, CALEADAPTER_TAG, "OUT %s", __func__);
+}
+
+void CALEStopGattServer()
+{
+    OIC_LOG_V(DEBUG, CALEADAPTER_TAG, "IN %s", __func__);
+
+    oc_mutex_lock(g_bleIsServerMutex);
+    switch (g_adapterType)
+    {
+        case ADAPTER_SERVER:
+            CALEAdapterGattServerStop();
+            break;
+        case ADAPTER_CLIENT:
+            CALEAdapterGattClientStop();
+            break;
+        case ADAPTER_BOTH_CLIENT_SERVER:
+            CALEAdapterGattServerStop();
+            CALEAdapterGattClientStop();
+            break;
+        default:
+            break;
+    }
+    oc_mutex_unlock(g_bleIsServerMutex);
+    OIC_LOG_V(DEBUG, CALEADAPTER_TAG, "OUT %s", __func__);
+}