Merge branch 'cloud-interface'
[platform/upstream/iotivity.git] / resource / csdk / connectivity / src / camessagehandler.c
index 2343a5a..17b3a9b 100644 (file)
@@ -34,6 +34,7 @@
 #include "caadapterutils.h"
 #include "cainterfacecontroller.h"
 #include "caretransmission.h"
+#include "oic_string.h"
 
 #ifdef WITH_BWT
 #include "cablockwisetransfer.h"
@@ -56,9 +57,9 @@ static CAQueueingThread_t g_receiveThread;
 
 #else
 #define CA_MAX_RT_ARRAY_SIZE    3
-#endif  /* SINGLE_THREAD */
+#endif  // SINGLE_THREAD
 
-#define TAG "CA_MSG_HNDLR"
+#define TAG "OIC_CA_MSG_HANDLE"
 
 static CARetransmission_t g_retransmissionContext;
 
@@ -66,6 +67,7 @@ static CARetransmission_t g_retransmissionContext;
 static CARequestCallback g_requestHandler = NULL;
 static CAResponseCallback g_responseHandler = NULL;
 static CAErrorCallback g_errorHandler = NULL;
+static CANetworkMonitorCallback g_nwMonitorHandler = NULL;
 
 static void CAErrorHandler(const CAEndpoint_t *endpoint,
                            const void *data, uint32_t dataLen,
@@ -89,24 +91,18 @@ static bool CADropSecondMessage(CAHistory_t *history, const CAEndpoint_t *endpoi
 #ifdef WITH_BWT
 void CAAddDataToSendThread(CAData_t *data)
 {
-    OIC_LOG(DEBUG, TAG, "IN");
     VERIFY_NON_NULL_VOID(data, TAG, "data");
 
     // add thread
     CAQueueingThreadAddData(&g_sendThread, data, sizeof(CAData_t));
-
-    OIC_LOG(DEBUG, TAG, "OUT");
 }
 
 void CAAddDataToReceiveThread(CAData_t *data)
 {
-    OIC_LOG(DEBUG, TAG, "IN - CAAddDataToReceiveThread");
     VERIFY_NON_NULL_VOID(data, TAG, "data");
 
     // add thread
     CAQueueingThreadAddData(&g_receiveThread, data, sizeof(CAData_t));
-
-    OIC_LOG(DEBUG, TAG, "OUT - CAAddDataToReceiveThread");
 }
 #endif
 
@@ -139,32 +135,26 @@ static CAData_t* CAGenerateHandlerData(const CAEndpoint_t *endpoint,
     if (!ep)
     {
         OIC_LOG(ERROR, TAG, "endpoint clone failed");
-        OICFree(cadata);
-        return NULL;
+        goto exit;
     }
 
     OIC_LOG_V(DEBUG, TAG, "address : %s", ep->addr);
-    CAResult_t result;
 
-    if(CA_RESPONSE_DATA == dataType)
+    if (CA_RESPONSE_DATA == dataType)
     {
         CAResponseInfo_t* resInfo = (CAResponseInfo_t*)OICCalloc(1, sizeof(CAResponseInfo_t));
         if (!resInfo)
         {
             OIC_LOG(ERROR, TAG, "memory allocation failed");
-            OICFree(cadata);
-            CAFreeEndpoint(ep);
-            return NULL;
+            goto exit;
         }
 
-        result = CAGetResponseInfoFromPDU(data, resInfo, endpoint);
+        CAResult_t result = CAGetResponseInfoFromPDU(data, resInfo, endpoint);
         if (CA_STATUS_OK != result)
         {
             OIC_LOG(ERROR, TAG, "CAGetResponseInfoFromPDU Failed");
-            CAFreeEndpoint(ep);
             CADestroyResponseInfoInternal(resInfo);
-            OICFree(cadata);
-            return NULL;
+            goto exit;
         }
         cadata->responseInfo = resInfo;
         info = &resInfo->info;
@@ -181,29 +171,23 @@ static CAData_t* CAGenerateHandlerData(const CAEndpoint_t *endpoint,
         if (!reqInfo)
         {
             OIC_LOG(ERROR, TAG, "memory allocation failed");
-            OICFree(cadata);
-            CAFreeEndpoint(ep);
-            return NULL;
+            goto exit;
         }
 
-        result = CAGetRequestInfoFromPDU(data, endpoint, reqInfo);
+        CAResult_t result = CAGetRequestInfoFromPDU(data, endpoint, reqInfo);
         if (CA_STATUS_OK != result)
         {
             OIC_LOG(ERROR, TAG, "CAGetRequestInfoFromPDU failed");
-            CAFreeEndpoint(ep);
             CADestroyRequestInfoInternal(reqInfo);
-            OICFree(cadata);
-            return NULL;
+            goto exit;
         }
 
         if (CADropSecondMessage(&caglobals.ca.requestHistory, endpoint, reqInfo->info.messageId,
                                 reqInfo->info.token, reqInfo->info.tokenLength))
         {
             OIC_LOG(ERROR, TAG, "Second Request with same Token, Drop it");
-            CAFreeEndpoint(ep);
             CADestroyRequestInfoInternal(reqInfo);
-            OICFree(cadata);
-            return NULL;
+            goto exit;
         }
 
         cadata->requestInfo = reqInfo;
@@ -221,19 +205,15 @@ static CAData_t* CAGenerateHandlerData(const CAEndpoint_t *endpoint,
         if (!errorInfo)
         {
             OIC_LOG(ERROR, TAG, "Memory allocation failed!");
-            OICFree(cadata);
-            CAFreeEndpoint(ep);
-            return NULL;
+            goto exit;
         }
 
         CAResult_t result = CAGetErrorInfoFromPDU(data, endpoint, errorInfo);
         if (CA_STATUS_OK != result)
         {
             OIC_LOG(ERROR, TAG, "CAGetErrorInfoFromPDU failed");
-            CAFreeEndpoint(ep);
             OICFree(errorInfo);
-            OICFree(cadata);
-            return NULL;
+            goto exit;
         }
 
         cadata->errorInfo = errorInfo;
@@ -249,14 +229,17 @@ static CAData_t* CAGenerateHandlerData(const CAEndpoint_t *endpoint,
     cadata->remoteEndpoint = ep;
     cadata->dataType = dataType;
 
+    OIC_LOG(DEBUG, TAG, "CAGenerateHandlerData OUT");
     return cadata;
 
-    OIC_LOG(DEBUG, TAG, "CAGenerateHandlerData OUT");
+exit:
+    OICFree(cadata);
+    CAFreeEndpoint(ep);
+    return NULL;
 }
 
 static void CATimeoutCallback(const CAEndpoint_t *endpoint, const void *pdu, uint32_t size)
 {
-    OIC_LOG(DEBUG, TAG, "IN");
     VERIFY_NON_NULL_VOID(endpoint, TAG, "endpoint");
     VERIFY_NON_NULL_VOID(pdu, TAG, "pdu");
 
@@ -304,13 +287,23 @@ static void CATimeoutCallback(const CAEndpoint_t *endpoint, const void *pdu, uin
     cadata->requestInfo = NULL;
     cadata->responseInfo = resInfo;
 
+#ifdef WITH_BWT
+    if (CAIsSupportedBlockwiseTransfer(endpoint->adapter))
+    {
+        res = CARemoveBlockDataFromListWithSeed(resInfo->info.token, resInfo->info.tokenLength,
+                                                endpoint->port);
+        if (CA_STATUS_OK != res)
+        {
+            OIC_LOG(ERROR, TAG, "CARemoveBlockDataFromListWithSeed failed");
+        }
+    }
+#endif // WITH_BWT
+
 #ifdef SINGLE_THREAD
     CAProcessReceivedData(cadata);
 #else
     CAQueueingThreadAddData(&g_receiveThread, cadata, sizeof(CAData_t));
 #endif
-
-    OIC_LOG(DEBUG, TAG, "OUT");
 }
 
 static void CADestroyData(void *data, uint32_t size)
@@ -385,32 +378,94 @@ static void CAProcessReceivedData(CAData_t *data)
         g_errorHandler(rep, data->errorInfo);
     }
 
-#ifdef SINGLE_THREAD
     CADestroyData(data, sizeof(CAData_t));
-#endif
 
     OIC_LOG(DEBUG, TAG, "CAProcessReceivedData OUT");
 }
 #endif
 
 #ifndef SINGLE_THREAD
-
 static void CAReceiveThreadProcess(void *threadData)
 {
-    OIC_LOG(DEBUG, TAG, "IN");
 #ifndef SINGLE_HANDLE
     CAData_t *data = (CAData_t *) threadData;
     CAProcessReceivedData(data);
 #else
     (void)threadData;
 #endif
-    OIC_LOG(DEBUG, TAG, "OUT");
 }
-#endif
+#endif // SINGLE_THREAD
+
+static CAResult_t CAProcessMulticastData(const CAData_t *data)
+{
+    VERIFY_NON_NULL(data, TAG, "data");
+    VERIFY_NON_NULL(data->remoteEndpoint, TAG, "remoteEndpoint");
+
+    coap_pdu_t *pdu = NULL;
+    CAInfo_t *info = NULL;
+    coap_list_t *options = NULL;
+    coap_transport_type transport = coap_udp;
+    CAResult_t res = CA_SEND_FAILED;
+    if (NULL != data->requestInfo)
+    {
+        OIC_LOG(DEBUG, TAG, "requestInfo is available..");
+
+        info = &data->requestInfo->info;
+        pdu = CAGeneratePDU(CA_GET, info, data->remoteEndpoint, &options, &transport);
+
+        if (NULL != pdu)
+        {
+#ifdef WITH_BWT
+            if (CAIsSupportedBlockwiseTransfer(data->remoteEndpoint->adapter))
+            {
+                // Blockwise transfer
+                res = CAAddBlockOption(&pdu, info, data->remoteEndpoint, &options);
+                if (CA_STATUS_OK != res)
+                {
+                    OIC_LOG(DEBUG, TAG, "CAAddBlockOption has failed");
+                    goto exit;
+                }
+            }
+#endif // WITH_BWT
+        }
+        else
+        {
+            OIC_LOG(ERROR,TAG,"Failed to generate multicast PDU");
+            CASendErrorInfo(data->remoteEndpoint, info, CA_SEND_FAILED);
+            return res;
+        }
+    }
+    else
+    {
+        OIC_LOG(ERROR, TAG, "not supported message type for multicast.");
+        return res;
+    }
+
+    CALogPDUInfo(pdu, data->remoteEndpoint);
+
+    OIC_LOG(DEBUG, TAG, "pdu to send :");
+    OIC_LOG_BUFFER(DEBUG, TAG,  (uint8_t*)pdu->hdr, pdu->length);
+
+    res = CASendMulticastData(data->remoteEndpoint, pdu->hdr, pdu->length);
+    if (CA_STATUS_OK != res)
+    {
+        OIC_LOG_V(ERROR, TAG, "send failed:%d", res);
+        goto exit;
+    }
+
+    coap_delete_list(options);
+    coap_delete_pdu(pdu);
+    return res;
+
+exit:
+    CAErrorHandler(data->remoteEndpoint, pdu->hdr, pdu->length, res);
+    coap_delete_list(options);
+    coap_delete_pdu(pdu);
+    return res;
+}
 
 static CAResult_t CAProcessSendData(const CAData_t *data)
 {
-    OIC_LOG(DEBUG, TAG, "IN");
     VERIFY_NON_NULL(data, TAG, "data");
     VERIFY_NON_NULL(data->remoteEndpoint, TAG, "remoteEndpoint");
 
@@ -420,10 +475,13 @@ static CAResult_t CAProcessSendData(const CAData_t *data)
 
     coap_pdu_t *pdu = NULL;
     CAInfo_t *info = NULL;
+    coap_list_t *options = NULL;
+    coap_transport_type transport = coap_udp;
 
     if (SEND_TYPE_UNICAST == type)
     {
         OIC_LOG(DEBUG,TAG,"Unicast message");
+
 #ifdef ROUTING_GATEWAY
         /*
          * When forwarding a packet, do not attempt retransmission as its the responsibility of
@@ -440,7 +498,8 @@ static CAResult_t CAProcessSendData(const CAData_t *data)
 #ifdef ROUTING_GATEWAY
             skipRetransmission = data->requestInfo->info.skipRetransmission;
 #endif
-            pdu = CAGeneratePDU(data->requestInfo->method, info, data->remoteEndpoint);
+            pdu = CAGeneratePDU(data->requestInfo->method, info, data->remoteEndpoint,
+                                &options, &transport);
         }
         else if (NULL != data->responseInfo)
         {
@@ -450,7 +509,8 @@ static CAResult_t CAProcessSendData(const CAData_t *data)
 #ifdef ROUTING_GATEWAY
             skipRetransmission = data->responseInfo->info.skipRetransmission;
 #endif
-            pdu = CAGeneratePDU(data->responseInfo->result, info, data->remoteEndpoint);
+            pdu = CAGeneratePDU(data->responseInfo->result, info, data->remoteEndpoint,
+                                &options, &transport);
         }
         else
         {
@@ -462,27 +522,25 @@ static CAResult_t CAProcessSendData(const CAData_t *data)
         if (NULL != pdu)
         {
 #ifdef WITH_BWT
-            if (CA_ADAPTER_GATT_BTLE != data->remoteEndpoint->adapter
-#ifdef TCP_ADAPTER
-                    && CA_ADAPTER_TCP != data->remoteEndpoint->adapter
-#endif
-                    )
+            if (CAIsSupportedBlockwiseTransfer(data->remoteEndpoint->adapter))
             {
                 // Blockwise transfer
                 if (NULL != info)
                 {
                     CAResult_t res = CAAddBlockOption(&pdu, info,
-                                                      data->remoteEndpoint);
+                                                      data->remoteEndpoint,
+                                                      &options);
                     if (CA_STATUS_OK != res)
                     {
                         OIC_LOG(INFO, TAG, "to write block option has failed");
                         CAErrorHandler(data->remoteEndpoint, pdu->hdr, pdu->length, res);
+                        coap_delete_list(options);
                         coap_delete_pdu(pdu);
                         return res;
                     }
                 }
             }
-#endif
+#endif // WITH_BWT
             CALogPDUInfo(pdu, data->remoteEndpoint);
 
             res = CASendUnicastData(data->remoteEndpoint, pdu->hdr, pdu->length);
@@ -490,12 +548,13 @@ static CAResult_t CAProcessSendData(const CAData_t *data)
             {
                 OIC_LOG_V(ERROR, TAG, "send failed:%d", res);
                 CAErrorHandler(data->remoteEndpoint, pdu->hdr, pdu->length, res);
+                coap_delete_list(options);
                 coap_delete_pdu(pdu);
                 return res;
             }
 
-#ifdef TCP_ADAPTER
-            if (CA_ADAPTER_TCP == data->remoteEndpoint->adapter)
+#ifdef WITH_TCP
+            if (CAIsSupportedCoAPOverTCP(data->remoteEndpoint->adapter))
             {
                 OIC_LOG(INFO, TAG, "retransmission will be not worked");
             }
@@ -512,11 +571,13 @@ static CAResult_t CAProcessSendData(const CAData_t *data)
                 {
                     //when retransmission not supported this will return CA_NOT_SUPPORTED, ignore
                     OIC_LOG_V(INFO, TAG, "retransmission is not enabled due to error, res : %d", res);
+                    coap_delete_list(options);
                     coap_delete_pdu(pdu);
                     return res;
                 }
             }
 
+            coap_delete_list(options);
             coap_delete_pdu(pdu);
         }
         else
@@ -529,101 +590,36 @@ static CAResult_t CAProcessSendData(const CAData_t *data)
     else if (SEND_TYPE_MULTICAST == type)
     {
         OIC_LOG(DEBUG,TAG,"Multicast message");
-        if (NULL != data->requestInfo)
-        {
-            OIC_LOG(DEBUG, TAG, "requestInfo is available..");
-
-            info = &data->requestInfo->info;
-            pdu = CAGeneratePDU(CA_GET, info, data->remoteEndpoint);
-            if (NULL != pdu)
-            {
-#ifdef WITH_BWT
-                if (CA_ADAPTER_GATT_BTLE != data->remoteEndpoint->adapter
-#ifdef TCP_ADAPTER
-                        && CA_ADAPTER_TCP != data->remoteEndpoint->adapter
-#endif
-                        )
-                {
-                    // Blockwise transfer
-                    CAResult_t res = CAAddBlockOption(&pdu, &data->requestInfo->info,
-                                                      data->remoteEndpoint);
-                    if (CA_STATUS_OK != res)
-                    {
-                        OIC_LOG(DEBUG, TAG, "CAAddBlockOption has failed");
-                        CAErrorHandler(data->remoteEndpoint, pdu->hdr, pdu->length, res);
-                        coap_delete_pdu(pdu);
-                        return res;
-                    }
-                }
-#endif
-            }
-            else
-            {
-                OIC_LOG(ERROR,TAG,"Failed to generate multicast PDU");
-                CASendErrorInfo(data->remoteEndpoint, info, CA_SEND_FAILED);
-                return CA_SEND_FAILED;
-            }
-        }
-        else if (NULL != data->responseInfo)
+#ifdef WITH_TCP
+        /*
+         * If CoAP over TCP is enabled, the CoAP pdu wont be same for IP and other adapters.
+         * That's why we need to generate two pdu's, one for IP and second for other transports.
+         * Two possible cases we might have to split: a) when adapter is CA_DEFAULT_ADAPTER
+         * b) when one of the adapter is IP adapter(ex: CA_ADAPTER_IP | CA_ADAPTER_GATT_BTLE)
+         */
+        if (data->remoteEndpoint->adapter == CA_DEFAULT_ADAPTER ||
+                (CA_ADAPTER_IP & data->remoteEndpoint->adapter &&
+                    CA_ADAPTER_IP != data->remoteEndpoint->adapter))
         {
-            OIC_LOG(DEBUG, TAG, "responseInfo is available..");
-
-            info = &data->responseInfo->info;
-            pdu = CAGeneratePDU(data->responseInfo->result, info, data->remoteEndpoint);
-
-            if (NULL != pdu)
+            if (data->remoteEndpoint->adapter == CA_DEFAULT_ADAPTER)
             {
-#ifdef WITH_BWT
-                if (CA_ADAPTER_GATT_BTLE != data->remoteEndpoint->adapter
-#ifdef TCP_ADAPTER
-                        && CA_ADAPTER_TCP != data->remoteEndpoint->adapter
-#endif
-                        )
-                {
-                    // Blockwise transfer
-                    if (NULL != info)
-                    {
-                        CAResult_t res = CAAddBlockOption(&pdu, info,
-                                                          data->remoteEndpoint);
-                        if (CA_STATUS_OK != res)
-                        {
-                            OIC_LOG(INFO, TAG, "to write block option has failed");
-                            CAErrorHandler(data->remoteEndpoint, pdu->hdr, pdu->length, res);
-                            coap_delete_pdu(pdu);
-                            return res;
-                        }
-                    }
-                }
-#endif
+                data->remoteEndpoint->adapter = CA_ALL_ADAPTERS ^ CA_ADAPTER_IP;
             }
             else
             {
-                OIC_LOG(ERROR,TAG,"Failed to generate multicast PDU");
-                CASendErrorInfo(data->remoteEndpoint, info, CA_SEND_FAILED);
-                return CA_SEND_FAILED;
+                data->remoteEndpoint->adapter = data->remoteEndpoint->adapter ^ CA_ADAPTER_IP;
             }
+            CAProcessMulticastData(data);
+            data->remoteEndpoint->adapter = CA_ADAPTER_IP;
+            CAProcessMulticastData(data);
         }
         else
         {
-            OIC_LOG(ERROR, TAG, "request or response info is empty");
-            return CA_SEND_FAILED;
+            CAProcessMulticastData(data);
         }
-
-        CALogPDUInfo(pdu, data->remoteEndpoint);
-
-        OIC_LOG(DEBUG, TAG, "pdu to send :");
-        OIC_LOG_BUFFER(DEBUG, TAG,  pdu->hdr, pdu->length);
-
-        res = CASendMulticastData(data->remoteEndpoint, pdu->hdr, pdu->length);
-        if (CA_STATUS_OK != res)
-        {
-            OIC_LOG_V(ERROR, TAG, "send failed:%d", res);
-            CAErrorHandler(data->remoteEndpoint, pdu->hdr, pdu->length, res);
-            coap_delete_pdu(pdu);
-            return res;
-        }
-
-        coap_delete_pdu(pdu);
+#else
+        CAProcessMulticastData(data);
+#endif
     }
 
     return CA_STATUS_OK;
@@ -635,7 +631,6 @@ static void CASendThreadProcess(void *threadData)
     CAData_t *data = (CAData_t *) threadData;
     CAProcessSendData(data);
 }
-
 #endif
 
 /*
@@ -679,7 +674,7 @@ static bool CADropSecondMessage(CAHistory_t *history, const CAEndpoint_t *ep, ui
             if ((familyFlags ^ item->flags) == CA_IPFAMILY_MASK)
             {
                 OIC_LOG_V(INFO, TAG, "IPv%c duplicate message ignored",
-                                            familyFlags & CA_IPV6 ? '6' : '4');
+                          familyFlags & CA_IPV6 ? '6' : '4');
                 ret = true;
                 break;
             }
@@ -705,7 +700,6 @@ static bool CADropSecondMessage(CAHistory_t *history, const CAEndpoint_t *ep, ui
 static void CAReceivedPacketCallback(const CASecureEndpoint_t *sep,
                                      const void *data, uint32_t dataLen)
 {
-    OIC_LOG(DEBUG, TAG, "IN");
     VERIFY_NON_NULL_VOID(sep, TAG, "remoteEndpoint");
     VERIFY_NON_NULL_VOID(data, TAG, "data");
 
@@ -744,8 +738,8 @@ static void CAReceivedPacketCallback(const CASecureEndpoint_t *sep,
             return;
         }
 
-#ifdef TCP_ADAPTER
-        if (CA_ADAPTER_TCP == sep->endpoint.adapter)
+#ifdef WITH_TCP
+        if (CAIsSupportedCoAPOverTCP(sep->endpoint.adapter))
         {
             OIC_LOG(INFO, TAG, "retransmission is not supported");
         }
@@ -783,16 +777,12 @@ static void CAReceivedPacketCallback(const CASecureEndpoint_t *sep,
     CAProcessReceivedData(cadata);
 #else
 #ifdef WITH_BWT
-    if (CA_ADAPTER_GATT_BTLE != sep->endpoint.adapter
-#ifdef TCP_ADAPTER
-            && CA_ADAPTER_TCP != sep->endpoint.adapter
-#endif
-            )
+    if (CAIsSupportedBlockwiseTransfer(sep->endpoint.adapter))
     {
         CAResult_t res = CAReceiveBlockWiseData(pdu, &(sep->endpoint), cadata, dataLen);
-        if (CA_NOT_SUPPORTED == res)
+        if (CA_NOT_SUPPORTED == res || CA_REQUEST_TIMEOUT == res)
         {
-            OIC_LOG(ERROR, TAG, "this message does not have block option");
+            OIC_LOG(DEBUG, TAG, "this message does not have block option");
             CAQueueingThreadAddData(&g_receiveThread, cadata, sizeof(CAData_t));
         }
         else
@@ -805,20 +795,9 @@ static void CAReceivedPacketCallback(const CASecureEndpoint_t *sep,
     {
         CAQueueingThreadAddData(&g_receiveThread, cadata, sizeof(CAData_t));
     }
-#endif
+#endif // SINGLE_THREAD
 
     coap_delete_pdu(pdu);
-
-    OIC_LOG(DEBUG, TAG, "OUT");
-}
-
-static void CANetworkChangedCallback(const CAEndpoint_t *info, CANetworkStatus_t status)
-{
-    (void)info;
-    (void)status;
-    OIC_LOG(DEBUG, TAG, "IN");
-
-    OIC_LOG(DEBUG, TAG, "OUT");
 }
 
 void CAHandleRequestResponseCallbacks()
@@ -838,21 +817,13 @@ void CAHandleRequestResponseCallbacks()
 
     ca_mutex_unlock(g_receiveThread.threadMutex);
 
-    if (NULL == item)
-    {
-        return;
-    }
-
-    // get values
-    void *msg = item->msg;
-
-    if (NULL == msg)
+    if (NULL == item || NULL == item->msg)
     {
         return;
     }
 
     // get endpoint
-    CAData_t *td = (CAData_t *) msg;
+    CAData_t *td = (CAData_t *) item->msg;
 
     if (td->requestInfo && g_requestHandler)
     {
@@ -870,11 +841,11 @@ void CAHandleRequestResponseCallbacks()
         g_errorHandler(td->remoteEndpoint, td->errorInfo);
     }
 
-    CADestroyData(msg, sizeof(CAData_t));
+    CADestroyData(item->msg, sizeof(CAData_t));
     OICFree(item);
 
-#endif /* SINGLE_HANDLE */
-#endif
+#endif // SINGLE_HANDLE
+#endif // SINGLE_THREAD
 }
 
 static CAData_t* CAPrepareSendData(const CAEndpoint_t *endpoint, const void *sendData,
@@ -889,22 +860,21 @@ static CAData_t* CAPrepareSendData(const CAEndpoint_t *endpoint, const void *sen
         return NULL;
     }
 
-    if(CA_REQUEST_DATA == dataType)
+    if (CA_REQUEST_DATA == dataType)
     {
         // clone request info
         CARequestInfo_t *request = CACloneRequestInfo((CARequestInfo_t *)sendData);
 
-        if(!request)
+        if (!request)
         {
             OIC_LOG(ERROR, TAG, "CACloneRequestInfo failed");
-            OICFree(cadata);
-            return NULL;
+            goto exit;
         }
 
         cadata->type = request->isMulticast ? SEND_TYPE_MULTICAST : SEND_TYPE_UNICAST;
         cadata->requestInfo =  request;
     }
-    else if(CA_RESPONSE_DATA == dataType)
+    else if (CA_RESPONSE_DATA == dataType)
     {
         // clone response info
         CAResponseInfo_t *response = CACloneResponseInfo((CAResponseInfo_t *)sendData);
@@ -912,8 +882,7 @@ static CAData_t* CAPrepareSendData(const CAEndpoint_t *endpoint, const void *sen
         if(!response)
         {
             OIC_LOG(ERROR, TAG, "CACloneResponseInfo failed");
-            OICFree(cadata);
-            return NULL;
+            goto exit;
         }
 
         cadata->type = response->isMulticast ? SEND_TYPE_MULTICAST : SEND_TYPE_UNICAST;
@@ -922,29 +891,30 @@ static CAData_t* CAPrepareSendData(const CAEndpoint_t *endpoint, const void *sen
     else
     {
         OIC_LOG(ERROR, TAG, "CAPrepareSendData unknown data type");
-        OICFree(cadata);
-        return NULL;
+        goto exit;
     }
 
     CAEndpoint_t* ep = CACloneEndpoint(endpoint);
     if (!ep)
     {
         OIC_LOG(ERROR, TAG, "endpoint clone failed");
-        CADestroyData(cadata, sizeof(CAData_t));
-        return NULL;
+        goto exit;
     }
 
     cadata->remoteEndpoint = ep;
     cadata->dataType = dataType;
     return cadata;
+
+exit:
+    CADestroyData(cadata, sizeof(CAData_t));
+    return NULL;
 }
 
-CAResult_t CADetachRequestMessage(const CAEndpoint_t *object, const CARequestInfo_t *request)
+CAResult_t CADetachSendMessage(const CAEndpoint_t *endpoint, const void *sendMsg,
+                               CADataType_t dataType)
 {
-    OIC_LOG(DEBUG, TAG, "IN");
-
-    VERIFY_NON_NULL(object, TAG, "object");
-    VERIFY_NON_NULL(request, TAG, "request");
+    VERIFY_NON_NULL(endpoint, TAG, "endpoint");
+    VERIFY_NON_NULL(sendMsg, TAG, "sendMsg");
 
     if (false == CAIsSelectedNetworkAvailable())
     {
@@ -958,9 +928,9 @@ CAResult_t CADetachRequestMessage(const CAEndpoint_t *object, const CARequestInf
         OIC_LOG(ERROR, TAG, "max RT queue size reached!");
         return CA_SEND_FAILED;
     }
-#endif /* ARDUINO */
+#endif // ARDUINO
 
-    CAData_t *data = CAPrepareSendData(object, request, CA_REQUEST_DATA);
+    CAData_t *data = CAPrepareSendData(endpoint, sendMsg, dataType);
     if(!data)
     {
         OIC_LOG(ERROR, TAG, "CAPrepareSendData failed");
@@ -969,85 +939,21 @@ CAResult_t CADetachRequestMessage(const CAEndpoint_t *object, const CARequestInf
 
 #ifdef SINGLE_THREAD
     CAResult_t result = CAProcessSendData(data);
-    if(CA_STATUS_OK != result)
+    if (CA_STATUS_OK != result)
     {
         OIC_LOG(ERROR, TAG, "CAProcessSendData failed");
+        CADestroyData(data, sizeof(CAData_t));
         return result;
     }
 
     CADestroyData(data, sizeof(CAData_t));
 #else
 #ifdef WITH_BWT
-    if (CA_ADAPTER_GATT_BTLE != object->adapter
-#ifdef TCP_ADAPTER
-            && CA_ADAPTER_TCP != object->adapter
-#endif
-            )
+    if (CAIsSupportedBlockwiseTransfer(endpoint->adapter))
     {
         // send block data
         CAResult_t res = CASendBlockWiseData(data);
-        if(CA_NOT_SUPPORTED == res)
-        {
-            OIC_LOG(DEBUG, TAG, "normal msg will be sent");
-            CAQueueingThreadAddData(&g_sendThread, data, sizeof(CAData_t));
-            return CA_STATUS_OK;
-        }
-        else
-        {
-            CADestroyData(data, sizeof(CAData_t));
-        }
-        return res;
-    }
-    else
-#endif
-    {
-        CAQueueingThreadAddData(&g_sendThread, data, sizeof(CAData_t));
-    }
-#endif
-
-    OIC_LOG(DEBUG, TAG, "OUT");
-    return CA_STATUS_OK;
-}
-
-CAResult_t CADetachResponseMessage(const CAEndpoint_t *object,
-                                   const CAResponseInfo_t *response)
-{
-    OIC_LOG(DEBUG, TAG, "IN");
-    VERIFY_NON_NULL(object, TAG, "object");
-    VERIFY_NON_NULL(response, TAG, "response");
-
-    if (false == CAIsSelectedNetworkAvailable())
-    {
-        return CA_STATUS_FAILED;
-    }
-
-    CAData_t *data = CAPrepareSendData(object, response, CA_RESPONSE_DATA);
-    if(!data)
-    {
-        OIC_LOG(ERROR, TAG, "CAPrepareSendData failed");
-        return CA_MEMORY_ALLOC_FAILED;
-    }
-
-#ifdef SINGLE_THREAD
-    CAResult_t result = CAProcessSendData(data);
-    if(result != CA_STATUS_OK)
-    {
-        OIC_LOG(ERROR, TAG, "CAProcessSendData failed");
-        return result;
-    }
-
-    CADestroyData(data, sizeof(CAData_t));
-#else
-#ifdef WITH_BWT
-    if (CA_ADAPTER_GATT_BTLE != object->adapter
-#ifdef TCP_ADAPTER
-            && CA_ADAPTER_TCP != object->adapter
-#endif
-            )
-    {
-        // send block data
-        CAResult_t res = CASendBlockWiseData(data);
-        if(CA_NOT_SUPPORTED == res)
+        if (CA_NOT_SUPPORTED == res)
         {
             OIC_LOG(DEBUG, TAG, "normal msg will be sent");
             CAQueueingThreadAddData(&g_sendThread, data, sizeof(CAData_t));
@@ -1060,50 +966,36 @@ CAResult_t CADetachResponseMessage(const CAEndpoint_t *object,
         return res;
     }
     else
-#endif
+#endif // WITH_BWT
     {
         CAQueueingThreadAddData(&g_sendThread, data, sizeof(CAData_t));
     }
-#endif
+#endif // SINGLE_THREAD
 
-    OIC_LOG(DEBUG, TAG, "OUT");
     return CA_STATUS_OK;
 }
 
-CAResult_t CADetachMessageResourceUri(const CAURI_t resourceUri, const CAToken_t token,
-                                      uint8_t tokenLength, const CAHeaderOption_t *options,
-                                      uint8_t numOptions)
-{
-    (void)resourceUri;
-    (void)token;
-    (void)tokenLength;
-    (void)options;
-    (void)numOptions;
-    return CA_NOT_SUPPORTED;
-}
-
 void CASetInterfaceCallbacks(CARequestCallback ReqHandler, CAResponseCallback RespHandler,
                              CAErrorCallback errorHandler)
 {
-    OIC_LOG(DEBUG, TAG, "IN");
     g_requestHandler = ReqHandler;
     g_responseHandler = RespHandler;
     g_errorHandler = errorHandler;
-    OIC_LOG(DEBUG, TAG, "OUT");
+}
+
+void CASetNetworkMonitorCallback(CANetworkMonitorCallback nwMonitorHandler)
+{
+    g_nwMonitorHandler = nwMonitorHandler;
 }
 
 CAResult_t CAInitializeMessageHandler()
 {
-    OIC_LOG(DEBUG, TAG, "IN");
     CASetPacketReceivedCallback(CAReceivedPacketCallback);
-
-    CASetNetworkChangeCallback(CANetworkChangedCallback);
     CASetErrorHandleCallback(CAErrorHandler);
 
 #ifndef SINGLE_THREAD
     // create thread pool
     CAResult_t res = ca_thread_pool_init(MAX_THREAD_POOL_SIZE, &g_threadPoolHandle);
-
     if (CA_STATUS_OK != res)
     {
         OIC_LOG(ERROR, TAG, "thread pool initialize error.");
@@ -1111,58 +1003,91 @@ CAResult_t CAInitializeMessageHandler()
     }
 
     // send thread initialize
-    if (CA_STATUS_OK != CAQueueingThreadInitialize(&g_sendThread, g_threadPoolHandle,
-                                                   CASendThreadProcess, CADestroyData))
+    res = CAQueueingThreadInitialize(&g_sendThread, g_threadPoolHandle,
+                                     CASendThreadProcess, CADestroyData);
+    if (CA_STATUS_OK != res)
     {
         OIC_LOG(ERROR, TAG, "Failed to Initialize send queue thread");
-        return CA_STATUS_FAILED;
+        ca_thread_pool_free(g_threadPoolHandle);
+        g_threadPoolHandle = NULL;
+        return res;
     }
 
     // start send thread
     res = CAQueueingThreadStart(&g_sendThread);
-
     if (CA_STATUS_OK != res)
     {
         OIC_LOG(ERROR, TAG, "thread start error(send thread).");
         ca_thread_pool_free(g_threadPoolHandle);
         g_threadPoolHandle = NULL;
+        CAQueueingThreadDestroy(&g_sendThread);
         return res;
     }
 
     // receive thread initialize
-    if (CA_STATUS_OK != CAQueueingThreadInitialize(&g_receiveThread, g_threadPoolHandle,
-                                                   CAReceiveThreadProcess, CADestroyData))
+    res = CAQueueingThreadInitialize(&g_receiveThread, g_threadPoolHandle,
+                                     CAReceiveThreadProcess, CADestroyData);
+    if (CA_STATUS_OK != res)
     {
         OIC_LOG(ERROR, TAG, "Failed to Initialize receive queue thread");
-        return CA_STATUS_FAILED;
+        ca_thread_pool_free(g_threadPoolHandle);
+        g_threadPoolHandle = NULL;
+        CAQueueingThreadDestroy(&g_sendThread);
+        return res;
     }
 
 #ifndef SINGLE_HANDLE // This will be enabled when RI supports multi threading
     // start receive thread
-    res = CAQueueingThreadStart(&gReceiveThread);
-
-    if (res != CA_STATUS_OK)
+    res = CAQueueingThreadStart(&g_receiveThread);
+    if (CA_STATUS_OK != res)
     {
         OIC_LOG(ERROR, TAG, "thread start error(receive thread).");
+        ca_thread_pool_free(g_threadPoolHandle);
+        g_threadPoolHandle = NULL;
+        CAQueueingThreadDestroy(&g_sendThread);
+        CAQueueingThreadDestroy(&g_receiveThread);
         return res;
     }
-#endif /* SINGLE_HANDLE */
+#endif // SINGLE_HANDLE
 
     // retransmission initialize
-    CARetransmissionInitialize(&g_retransmissionContext, g_threadPoolHandle, CASendUnicastData,
-                               CATimeoutCallback, NULL);
+    res = CARetransmissionInitialize(&g_retransmissionContext, g_threadPoolHandle,
+                                     CASendUnicastData, CATimeoutCallback, NULL);
+    if (CA_STATUS_OK != res)
+    {
+        OIC_LOG(ERROR, TAG, "Failed to Initialize Retransmission.");
+        ca_thread_pool_free(g_threadPoolHandle);
+        g_threadPoolHandle = NULL;
+        CAQueueingThreadDestroy(&g_sendThread);
+        CAQueueingThreadDestroy(&g_receiveThread);
+        return res;
+    }
 
 #ifdef WITH_BWT
     // block-wise transfer initialize
-    CAInitializeBlockWiseTransfer(CAAddDataToSendThread, CAAddDataToReceiveThread);
+    res = CAInitializeBlockWiseTransfer(CAAddDataToSendThread, CAAddDataToReceiveThread);
+    if (CA_STATUS_OK != res)
+    {
+        OIC_LOG(ERROR, TAG, "Failed to Initialize BlockWiseTransfer.");
+        ca_thread_pool_free(g_threadPoolHandle);
+        g_threadPoolHandle = NULL;
+        CAQueueingThreadDestroy(&g_sendThread);
+        CAQueueingThreadDestroy(&g_receiveThread);
+        CARetransmissionDestroy(&g_retransmissionContext);
+        return res;
+    }
 #endif
 
     // start retransmission
     res = CARetransmissionStart(&g_retransmissionContext);
-
     if (CA_STATUS_OK != res)
     {
         OIC_LOG(ERROR, TAG, "thread start error(retransmission thread).");
+        ca_thread_pool_free(g_threadPoolHandle);
+        g_threadPoolHandle = NULL;
+        CAQueueingThreadDestroy(&g_sendThread);
+        CAQueueingThreadDestroy(&g_receiveThread);
+        CARetransmissionDestroy(&g_retransmissionContext);
         return res;
     }
 
@@ -1170,18 +1095,22 @@ CAResult_t CAInitializeMessageHandler()
     CAInitializeAdapters(g_threadPoolHandle);
 #else
     // retransmission initialize
-    CARetransmissionInitialize(&g_retransmissionContext, NULL, CASendUnicastData,
-                               CATimeoutCallback, NULL);
+    CAResult_t res = CARetransmissionInitialize(&g_retransmissionContext, NULL, CASendUnicastData,
+                                                CATimeoutCallback, NULL);
+    if (CA_STATUS_OK != res)
+    {
+        OIC_LOG(ERROR, TAG, "Failed to Initialize Retransmission.");
+        return res;
+    }
+
     CAInitializeAdapters();
-#endif
+#endif // SINGLE_THREAD
 
-    OIC_LOG(DEBUG, TAG, "OUT");
     return CA_STATUS_OK;
 }
 
 void CATerminateMessageHandler()
 {
-    OIC_LOG(DEBUG, TAG, "IN");
 #ifndef SINGLE_THREAD
     CATransportAdapter_t connType;
     u_arraylist_t *list = CAGetSelectedNetworkList();
@@ -1219,8 +1148,8 @@ void CATerminateMessageHandler()
     if (NULL != g_receiveThread.threadMutex)
     {
 #ifndef SINGLE_HANDLE // This will be enabled when RI supports multi threading
-        CAQueueingThreadStop(&gReceiveThread);
-#endif /* SINGLE_HANDLE */
+        CAQueueingThreadStop(&g_receiveThread);
+#endif
     }
 
     // destroy thread pool
@@ -1246,22 +1175,21 @@ void CATerminateMessageHandler()
     // stop retransmission
     CARetransmissionStop(&g_retransmissionContext);
     CARetransmissionDestroy(&g_retransmissionContext);
-#endif
-
-    OIC_LOG(DEBUG, TAG, "OUT");
+#endif // SINGLE_THREAD
 }
 
 void CALogPDUInfo(coap_pdu_t *pdu, const CAEndpoint_t *endpoint)
 {
     VERIFY_NON_NULL_VOID(pdu, TAG, "pdu");
+    VERIFY_NON_NULL_VOID(endpoint, TAG, "endpoint");
 
     OIC_LOG_V(DEBUG, TAG, "PDU Maker - payload : %s", pdu->data);
 
-#ifdef TCP_ADAPTER
-    if (CA_ADAPTER_TCP == endpoint->adapter)
+#ifdef WITH_TCP
+    if (CAIsSupportedCoAPOverTCP(endpoint->adapter))
     {
         OIC_LOG(DEBUG, TAG, "pdu header data :");
-        OIC_LOG_BUFFER(DEBUG, TAG,  pdu->hdr, pdu->length);
+        OIC_LOG_BUFFER(DEBUG, TAG,  (const uint8_t *) pdu->hdr, pdu->length);
     }
     else
 #endif
@@ -1279,13 +1207,13 @@ void CALogPDUInfo(coap_pdu_t *pdu, const CAEndpoint_t *endpoint)
 
 static void CALogPayloadInfo(CAInfo_t *info)
 {
-    if(info)
+    if (info)
     {
         if (info->options)
         {
             for (uint32_t i = 0; i < info->numOptions; i++)
             {
-                OIC_LOG_V(DEBUG, TAG, "optionID: %d", info->options[i].optionID);
+                OIC_LOG_V(DEBUG, TAG, "optionID: %u", info->options[i].optionID);
 
                 OIC_LOG_V(DEBUG, TAG, "list: %s", info->options[i].optionData);
             }
@@ -1293,7 +1221,7 @@ static void CALogPayloadInfo(CAInfo_t *info)
 
         if (info->payload)
         {
-            OIC_LOG_V(DEBUG, TAG, "payload: %p(%u)", info->payload,
+            OIC_LOG_V(DEBUG, TAG, "payload: %p(%zu)", info->payload,
                       info->payloadSize);
         }
 
@@ -1303,7 +1231,7 @@ static void CALogPayloadInfo(CAInfo_t *info)
             OIC_LOG_BUFFER(DEBUG, TAG, (const uint8_t *) info->token,
                            info->tokenLength);
         }
-        OIC_LOG_V(DEBUG, TAG, "msgID: %d", info->messageId);
+        OIC_LOG_V(DEBUG, TAG, "msgID: %u", info->messageId);
     }
     else
     {
@@ -1318,7 +1246,6 @@ void CAErrorHandler(const CAEndpoint_t *endpoint,
     OIC_LOG(DEBUG, TAG, "CAErrorHandler IN");
 
 #ifndef SINGLE_THREAD
-
     VERIFY_NON_NULL_VOID(endpoint, TAG, "remoteEndpoint");
     VERIFY_NON_NULL_VOID(data, TAG, "data");
 
@@ -1333,7 +1260,7 @@ void CAErrorHandler(const CAEndpoint_t *endpoint,
     }
 
     CAData_t *cadata = CAGenerateHandlerData(endpoint, NULL, pdu, CA_ERROR_DATA);
-    if(!cadata)
+    if (!cadata)
     {
         OIC_LOG(ERROR, TAG, "CAErrorHandler, CAGenerateHandlerData failed!");
         coap_delete_pdu(pdu);
@@ -1357,7 +1284,7 @@ static void CASendErrorInfo(const CAEndpoint_t *endpoint, const CAInfo_t *info,
     CAData_t *cadata = (CAData_t *) OICCalloc(1, sizeof(CAData_t));
     if (!cadata)
     {
-        OIC_LOG(ERROR, TAG, "memory allocation failed");
+        OIC_LOG(ERROR, TAG, "cadata memory allocation failed");
         return;
     }
 
@@ -1372,6 +1299,7 @@ static void CASendErrorInfo(const CAEndpoint_t *endpoint, const CAInfo_t *info,
     CAErrorInfo_t *errorInfo = (CAErrorInfo_t *)OICCalloc(1, sizeof (CAErrorInfo_t));
     if (!errorInfo)
     {
+        OIC_LOG(ERROR, TAG, "errorInfo memory allocation failed");
         OICFree(cadata);
         CAFreeEndpoint(ep);
         return;
@@ -1380,7 +1308,9 @@ static void CASendErrorInfo(const CAEndpoint_t *endpoint, const CAInfo_t *info,
     CAResult_t res = CACloneInfo(info, &errorInfo->info);
     if (CA_STATUS_OK != res)
     {
+        OIC_LOG(ERROR, TAG, "info clone failed");
         OICFree(cadata);
+        OICFree(errorInfo);
         CAFreeEndpoint(ep);
         return;
     }