Update snapshot(2018-02-07)
[platform/upstream/iotivity.git] / resource / csdk / stack / src / ocstack.c
index 13d595b..f5575b1 100644 (file)
@@ -36,6 +36,7 @@
 #ifndef __STDC_LIMIT_MACROS
 #define __STDC_LIMIT_MACROS
 #endif
+#include "iotivity_config.h"
 #include <inttypes.h>
 #include <string.h>
 #include <ctype.h>
 #include "oic_malloc.h"
 #include "oic_string.h"
 #include "logger.h"
+#include "trace.h"
 #include "ocserverrequest.h"
 #include "secureresourcemanager.h"
 #include "psinterface.h"
+#include "psiutils.h"
 #include "doxmresource.h"
 #include "cacommon.h"
 #include "cainterface.h"
 #include "ocpayload.h"
 #include "ocpayloadcbor.h"
-#include "platform_features.h"
+#include "cautilinterface.h"
+#include "oicgroup.h"
 
 #if defined (ROUTING_GATEWAY) || defined (ROUTING_EP)
 #include "routingutility.h"
@@ -67,7 +71,7 @@
 #endif
 
 #ifdef TCP_ADAPTER
-#include "oickeepalive.h"
+#include "oickeepaliveinternal.h"
 #endif
 
 //#ifdef DIRECT_PAIRING
@@ -80,9 +84,7 @@
 #ifdef HAVE_SYS_TIME_H
 #include <sys/time.h>
 #endif
-#include "coap_time.h"
-#include "utlist.h"
-#include "pdu.h"
+#include <coap/coap.h>
 
 #ifdef HAVE_ARPA_INET_H
 #include <arpa/inet.h>
@@ -110,6 +112,14 @@ typedef enum
 } OCPresenceState;
 #endif
 
+#if defined(__WITH_DTLS__) || defined (__WITH_TLS__)
+typedef struct
+{
+    OCOtmEventHandler cb;
+    void *ctx;
+} OCOtmEventHandler_t;
+#endif
+
 //-----------------------------------------------------------------------------
 // Private variables
 //-----------------------------------------------------------------------------
@@ -137,10 +147,17 @@ static bool gRASetInfo = false;
 #endif
 OCDeviceEntityHandler defaultDeviceHandler;
 void* defaultDeviceHandlerCallbackParameter = NULL;
-static const char COAP_TCP[] = "coap+tcp:";
-static const char COAPS_TCP[] = "coaps+tcp:";
+static const char COAP_TCP_SCHEME[] = "coap+tcp:";
+static const char COAPS_TCP_SCHEME[] = "coaps+tcp:";
 static const char CORESPEC[] = "core";
 
+CAAdapterStateChangedCB g_adapterHandler = NULL;
+CAConnectionStateChangedCB g_connectionHandler = NULL;
+
+#if defined(__WITH_DTLS__) || defined (__WITH_TLS__)
+static OCOtmEventHandler_t g_otmEventHandler = {NULL, NULL};
+#endif
+
 //-----------------------------------------------------------------------------
 // Macros
 //-----------------------------------------------------------------------------
@@ -255,6 +272,13 @@ static void deleteResourceType(OCResourceType *resourceType);
 static void deleteResourceInterface(OCResourceInterface *resourceInterface);
 
 /**
+ * Unbind all child resources.
+ *
+ * @param resourceChild Specified binded resource head is deleted from parent.
+ */
+static void unbindChildResources(OCChildResource *resourceChild);
+
+/**
  * Delete all of the dynamically allocated elements that were created for the resource.
  *
  * @param resource Specified resource.
@@ -288,27 +312,10 @@ static void incrementSequenceNumber(OCResource * resPtr);
  *
  * Note: At least one interface must succeed to initialize. If all calls to @ref CASelectNetwork
  * return something other than @ref CA_STATUS_OK, then this function fails.
- *
+ * @param transportType  OCTransportAdapter value to select.
  * @return ::CA_STATUS_OK on success, some other value upon failure.
  */
-static CAResult_t OCSelectNetwork();
-
-/**
- * Get the CoAP ticks after the specified number of milli-seconds.
- *
- * @param afterMilliSeconds Milli-seconds.
- * @return
- *     CoAP ticks
- */
-static uint32_t GetTicks(uint32_t afterMilliSeconds);
-
-/**
- * Convert CAResult_t to OCStackResult.
- *
- * @param caResult CAResult_t code.
- * @return ::OC_STACK_OK on success, some other value upon failure.
- */
-static OCStackResult CAResultToOCStackResult(CAResult_t caResult);
+static CAResult_t OCSelectNetwork(OCTransportAdapter transportType);
 
 /**
  * Convert CAResponseResult_t to OCStackResult.
@@ -319,15 +326,6 @@ static OCStackResult CAResultToOCStackResult(CAResult_t caResult);
 static OCStackResult CAResponseToOCStackResult(CAResponseResult_t caCode);
 
 /**
- * Convert OCStackResult to CAResponseResult_t.
- *
- * @param caCode OCStackResult code.
- * @param method OCMethod method the return code replies to.
- * @return ::CA_CONTENT on OK, some other value upon failure.
- */
-static CAResponseResult_t OCToCAStackResult(OCStackResult ocCode, OCMethod method);
-
-/**
  * Convert OCTransportFlags_t to CATransportModifiers_t.
  *
  * @param ocConType OCTransportFlags_t input.
@@ -393,6 +391,7 @@ static OCStackResult getQueryFromUri(const char * uri, char** resourceType, char
 static OCResourceType *findResourceType(OCResourceType * resourceTypeList,
         const char * resourceTypeName);
 
+#ifdef WITH_PRESENCE
 /**
  * Reset presence TTL for a ClientCB struct. ttlLevel will be set to 0.
  * TTL will be set to maxAge.
@@ -403,6 +402,7 @@ static OCResourceType *findResourceType(OCResourceType * resourceTypeList,
  * @return ::OC_STACK_OK on success, some other value upon failure.
  */
 static OCStackResult ResetPresenceTTL(ClientCB *cbNode, uint32_t maxAgeSeconds);
+#endif
 
 /**
  * Ensure the accept header option is set appropriatly before sending the requests and routing
@@ -415,20 +415,55 @@ static OCStackResult ResetPresenceTTL(ClientCB *cbNode, uint32_t maxAgeSeconds);
  */
 static OCStackResult OCSendRequest(const CAEndpoint_t *object, CARequestInfo_t *requestInfo);
 
+/**
+ * default adapter state change callback method
+ *
+ * @param adapter   CA network adapter type.
+ * @param enabled   current adapter state.
+ */
+static void OCDefaultAdapterStateChangedHandler(CATransportAdapter_t adapter, bool enabled);
+
+/**
+ * default connection state change callback method
+ *
+ * @param info          CAEndpoint which has address, port and etc.
+ * @param isConnected   current connection state.
+ */
+static void OCDefaultConnectionStateChangedHandler(const CAEndpoint_t *info, bool isConnected);
+
 //-----------------------------------------------------------------------------
 // Internal functions
 //-----------------------------------------------------------------------------
 
-uint32_t GetTicks(uint32_t afterMilliSeconds)
+bool checkProxyUri(OCHeaderOption *options, uint8_t numOptions)
+{
+    if (!options || 0 == numOptions)
+    {
+        OIC_LOG (INFO, TAG, "No options present");
+        return false;
+    }
+
+    for (uint8_t i = 0; i < numOptions; i++)
+    {
+        if (options[i].protocolID == OC_COAP_ID && options[i].optionID == OC_RSRVD_PROXY_OPTION_ID)
+        {
+            OIC_LOG(DEBUG, TAG, "Proxy URI is present");
+            return true;
+        }
+    }
+    return false;
+}
+
+uint32_t GetTicks(uint32_t milliSeconds)
 {
     coap_tick_t now;
     coap_ticks(&now);
 
     // Guard against overflow of uint32_t
-    if (afterMilliSeconds <= ((UINT32_MAX - (uint32_t)now) * MILLISECONDS_PER_SECOND) /
+    if (milliSeconds <= ((UINT32_MAX - (uint32_t)now) * MILLISECONDS_PER_SECOND) /
                              COAP_TICKS_PER_SECOND)
     {
-        return now + (afterMilliSeconds * COAP_TICKS_PER_SECOND)/MILLISECONDS_PER_SECOND;
+        return now + (milliSeconds * COAP_TICKS_PER_SECOND)/MILLISECONDS_PER_SECOND;
     }
     else
     {
@@ -463,6 +498,7 @@ void CopyDevAddrToEndpoint(const OCDevAddr *in, CAEndpoint_t *out)
     out->adapter = (CATransportAdapter_t)in->adapter;
     out->flags = OCToCATransportFlags(in->flags);
     OICStrcpy(out->addr, sizeof(out->addr), in->addr);
+    OICStrcpy(out->remoteId, sizeof(out->remoteId), in->remoteId);
 #if defined (ROUTING_GATEWAY) || defined (ROUTING_EP)
     /* This assert is to prevent accidental mismatch between address size macros defined in
      * RI and CA and cause crash here. */
@@ -487,12 +523,14 @@ static OCStackResult OCSendRequest(const CAEndpoint_t *object, CARequestInfo_t *
 {
     VERIFY_NON_NULL(object, FATAL, OC_STACK_INVALID_PARAM);
     VERIFY_NON_NULL(requestInfo, FATAL, OC_STACK_INVALID_PARAM);
+    OIC_TRACE_BEGIN(%s:OCSendRequest, TAG);
 
 #if defined (ROUTING_GATEWAY) || defined (ROUTING_EP)
     OCStackResult rmResult = RMAddInfo(object->routeData, requestInfo, true, NULL);
     if (OC_STACK_OK != rmResult)
     {
         OIC_LOG(ERROR, TAG, "Add destination option failed");
+        OIC_TRACE_END();
         return rmResult;
     }
 #endif
@@ -503,8 +541,11 @@ static OCStackResult OCSendRequest(const CAEndpoint_t *object, CARequestInfo_t *
     if(CA_STATUS_OK != result)
     {
         OIC_LOG_V(ERROR, TAG, "CASendRequest failed with CA error %u", result);
+        OIC_TRACE_END();
         return CAResultToOCResult(result);
     }
+
+    OIC_TRACE_END();
     return OC_STACK_OK;
 }
 //-----------------------------------------------------------------------------
@@ -523,11 +564,11 @@ OCStackResult OCStackFeedBack(CAToken_t token, uint8_t tokenLength, uint8_t stat
     {
     case OC_OBSERVER_NOT_INTERESTED:
         OIC_LOG(DEBUG, TAG, "observer not interested in our notifications");
-        observer = GetObserverUsingToken (token, tokenLength);
-        if(observer)
+        observer = GetObserverUsingToken(token, tokenLength);
+        if (observer)
         {
             result = FormOCEntityHandlerRequest(&ehRequest,
-                                                (OCRequestHandle)NULL,
+                                                0,
                                                 OC_REST_NOMETHOD,
                                                 &observer->devAddr,
                                                 (OCResourceHandle)NULL,
@@ -536,16 +577,23 @@ OCStackResult OCStackFeedBack(CAToken_t token, uint8_t tokenLength, uint8_t stat
                                                 OC_OBSERVE_DEREGISTER,
                                                 observer->observeId,
                                                 0);
-            if(result != OC_STACK_OK)
+            if (result != OC_STACK_OK)
             {
+                FreeObserver(observer);
                 return result;
             }
-            observer->resource->entityHandler(OC_OBSERVE_FLAG, &ehRequest,
-                            observer->resource->entityHandlerCallbackParam);
+
+            if (observer->resource && observer->resource->entityHandler)
+            {
+                observer->resource->entityHandler(OC_OBSERVE_FLAG, &ehRequest,
+                                                  observer->resource->entityHandlerCallbackParam);
+            }
+
+            FreeObserver(observer);
         }
 
-        result = DeleteObserverUsingToken (token, tokenLength);
-        if(result == OC_STACK_OK)
+        result = DeleteObserverUsingToken(token, tokenLength);
+        if (result == OC_STACK_OK)
         {
             OIC_LOG(DEBUG, TAG, "Removed observer successfully");
         }
@@ -558,12 +606,13 @@ OCStackResult OCStackFeedBack(CAToken_t token, uint8_t tokenLength, uint8_t stat
 
     case OC_OBSERVER_STILL_INTERESTED:
         OIC_LOG(DEBUG, TAG, "observer still interested, reset the failedCount");
-        observer = GetObserverUsingToken (token, tokenLength);
-        if(observer)
+        observer = GetObserverUsingToken(token, tokenLength);
+        if (observer)
         {
             observer->forceHighQos = 0;
             observer->failedCommCount = 0;
             result = OC_STACK_OK;
+            FreeObserver(observer);
         }
         else
         {
@@ -574,12 +623,12 @@ OCStackResult OCStackFeedBack(CAToken_t token, uint8_t tokenLength, uint8_t stat
     case OC_OBSERVER_FAILED_COMM:
         OIC_LOG(DEBUG, TAG, "observer is unreachable");
         observer = GetObserverUsingToken (token, tokenLength);
-        if(observer)
+        if (observer)
         {
-            if(observer->failedCommCount >= MAX_OBSERVER_FAILED_COMM)
+            if (observer->failedCommCount >= MAX_OBSERVER_FAILED_COMM)
             {
                 result = FormOCEntityHandlerRequest(&ehRequest,
-                                                    (OCRequestHandle)NULL,
+                                                    0,
                                                     OC_REST_NOMETHOD,
                                                     &observer->devAddr,
                                                     (OCResourceHandle)NULL,
@@ -588,15 +637,20 @@ OCStackResult OCStackFeedBack(CAToken_t token, uint8_t tokenLength, uint8_t stat
                                                     OC_OBSERVE_DEREGISTER,
                                                     observer->observeId,
                                                     0);
-                if(result != OC_STACK_OK)
+                if (result != OC_STACK_OK)
                 {
+                    FreeObserver(observer);
                     return OC_STACK_ERROR;
                 }
-                observer->resource->entityHandler(OC_OBSERVE_FLAG, &ehRequest,
-                                    observer->resource->entityHandlerCallbackParam);
 
-                result = DeleteObserverUsingToken (token, tokenLength);
-                if(result == OC_STACK_OK)
+                if (observer->resource && observer->resource->entityHandler)
+                {
+                    observer->resource->entityHandler(OC_OBSERVE_FLAG, &ehRequest,
+                                        observer->resource->entityHandlerCallbackParam);
+                }
+
+                result = DeleteObserverUsingToken(token, tokenLength);
+                if (result == OC_STACK_OK)
                 {
                     OIC_LOG(DEBUG, TAG, "Removed observer successfully");
                 }
@@ -609,10 +663,13 @@ OCStackResult OCStackFeedBack(CAToken_t token, uint8_t tokenLength, uint8_t stat
             else
             {
                 observer->failedCommCount++;
+                observer->forceHighQos = 1;
+                OIC_LOG_V(DEBUG, TAG, "Failed count for this observer is %d",
+                          observer->failedCommCount);
                 result = OC_STACK_CONTINUE;
             }
-            observer->forceHighQos = 1;
-            OIC_LOG_V(DEBUG, TAG, "Failed count for this observer is %d",observer->failedCommCount);
+
+            FreeObserver(observer);
         }
         break;
     default:
@@ -623,28 +680,6 @@ OCStackResult OCStackFeedBack(CAToken_t token, uint8_t tokenLength, uint8_t stat
     return result;
 }
 
-static OCStackResult CAResultToOCStackResult(CAResult_t caResult)
-{
-    OCStackResult ret = OC_STACK_ERROR;
-
-    switch(caResult)
-    {
-        case CA_ADAPTER_NOT_ENABLED:
-        case CA_SERVER_NOT_STARTED:
-            ret = OC_STACK_ADAPTER_NOT_ENABLED;
-            break;
-        case CA_MEMORY_ALLOC_FAILED:
-            ret = OC_STACK_NO_MEMORY;
-            break;
-        case CA_STATUS_INVALID_PARAM:
-            ret = OC_STACK_INVALID_PARAM;
-            break;
-        default:
-            break;
-    }
-    return ret;
-}
-
 OCStackResult CAResponseToOCStackResult(CAResponseResult_t caCode)
 {
     OCStackResult ret = OC_STACK_ERROR;
@@ -675,12 +710,36 @@ OCStackResult CAResponseToOCStackResult(CAResponseResult_t caCode)
         case CA_NOT_FOUND:
             ret = OC_STACK_NO_RESOURCE;
             break;
-        case CA_RETRANSMIT_TIMEOUT:
-            ret = OC_STACK_COMM_ERROR;
-            break;
         case CA_REQUEST_ENTITY_TOO_LARGE:
             ret = OC_STACK_TOO_LARGE_REQ;
             break;
+        case CA_METHOD_NOT_ALLOWED:
+            ret = OC_STACK_METHOD_NOT_ALLOWED;
+            break;
+        case CA_NOT_ACCEPTABLE:
+            ret = OC_STACK_NOT_ACCEPTABLE;
+            break;
+        case CA_FORBIDDEN_REQ:
+            ret = OC_STACK_FORBIDDEN_REQ;
+            break;
+        case CA_INTERNAL_SERVER_ERROR:
+            ret = OC_STACK_INTERNAL_SERVER_ERROR;
+            break;
+        case CA_NOT_IMPLEMENTED:
+            ret = OC_STACK_NOT_IMPLEMENTED;
+            break;
+        case CA_BAD_GATEWAY:
+            ret = OC_STACK_BAD_GATEWAY;
+            break;
+        case CA_SERVICE_UNAVAILABLE:
+            ret = OC_STACK_SERVICE_UNAVAILABLE;
+            break;
+        case CA_RETRANSMIT_TIMEOUT:
+            ret = OC_STACK_GATEWAY_TIMEOUT;
+            break;
+        case CA_PROXY_NOT_SUPPORTED:
+            ret = OC_STACK_PROXY_NOT_SUPPORTED;
+            break;
         default:
             break;
     }
@@ -736,9 +795,36 @@ CAResponseResult_t OCToCAStackResult(OCStackResult ocCode, OCMethod method)
         case OC_STACK_COMM_ERROR:
             ret = CA_RETRANSMIT_TIMEOUT;
             break;
+        case OC_STACK_METHOD_NOT_ALLOWED:
+            ret = CA_METHOD_NOT_ALLOWED;
+            break;
+        case OC_STACK_NOT_ACCEPTABLE:
+            ret = CA_NOT_ACCEPTABLE;
+            break;
         case OC_STACK_UNAUTHORIZED_REQ:
             ret = CA_UNAUTHORIZED_REQ;
             break;
+        case OC_STACK_FORBIDDEN_REQ:
+            ret = CA_FORBIDDEN_REQ;
+            break;
+        case OC_STACK_INTERNAL_SERVER_ERROR:
+            ret = CA_INTERNAL_SERVER_ERROR;
+            break;
+        case OC_STACK_NOT_IMPLEMENTED:
+            ret = CA_NOT_IMPLEMENTED;
+            break;
+        case OC_STACK_BAD_GATEWAY:
+            ret = CA_BAD_GATEWAY;
+            break;
+        case OC_STACK_SERVICE_UNAVAILABLE:
+            ret = CA_SERVICE_UNAVAILABLE;
+            break;
+        case OC_STACK_GATEWAY_TIMEOUT:
+            ret = CA_RETRANSMIT_TIMEOUT;
+            break;
+        case OC_STACK_PROXY_NOT_SUPPORTED:
+            ret = CA_PROXY_NOT_SUPPORTED;
+            break;
         default:
             break;
     }
@@ -766,6 +852,7 @@ OCTransportFlags CAToOCTransportFlags(CATransportFlags_t caFlags)
     return (OCTransportFlags)caFlags;
 }
 
+#ifdef WITH_PRESENCE
 static OCStackResult ResetPresenceTTL(ClientCB *cbNode, uint32_t maxAgeSeconds)
 {
     uint32_t lowerBound  = 0;
@@ -855,23 +942,11 @@ OCPresenceTrigger convertTriggerStringToEnum(const char * triggerStr)
         return OC_PRESENCE_TRIGGER_DELETE;
     }
 }
+#endif // WITH_PRESENCE
 
-/**
- * Encode an address string to match RFC 6874.
- *
- * @param outputAddress    a char array to be written with the encoded string.
- *
- * @param outputSize       size of outputAddress buffer.
- *
- * @param inputAddress     a char array of size <= CA_MAX_URI_LENGTH
- *                         containing a valid IPv6 address string.
- *
- * @return                 OC_STACK_OK if encoding succeeded.
- *                         Else an error occured.
- */
- OCStackResult encodeAddressForRFC6874(char *outputAddress,
-                                       size_t outputSize,
-                                       const char *inputAddress)
+OCStackResult OCEncodeAddressForRFC6874(char *outputAddress,
+                                        size_t outputSize,
+                                        const char *inputAddress)
 {
     VERIFY_NON_NULL(inputAddress,  FATAL, OC_STACK_INVALID_PARAM);
     VERIFY_NON_NULL(outputAddress, FATAL, OC_STACK_INVALID_PARAM);
@@ -884,7 +959,7 @@ OCPresenceTrigger convertTriggerStringToEnum(const char * triggerStr)
     if (inputSize > outputSize)
     {
         OIC_LOG_V(ERROR, TAG,
-                  "encodeAddressForRFC6874 failed: "
+                  "OCEncodeAddressForRFC6874 failed: "
                   "outputSize (%zu) < inputSize (%zu)",
                   outputSize, inputSize);
 
@@ -912,42 +987,77 @@ OCPresenceTrigger convertTriggerStringToEnum(const char * triggerStr)
     // If no string follows the first '%', then the input was invalid.
     if (scopeIdPart[0] == '\0')
     {
-        OIC_LOG(ERROR, TAG, "encodeAddressForRFC6874 failed: Invalid input string: no scope ID!");
+        OIC_LOG(ERROR, TAG, "OCEncodeAddressForRFC6874 failed: Invalid input string: no scope ID!");
         return OC_STACK_ERROR;
     }
 
     // Check to see if the string is already encoded
     if ((scopeIdPart[0] == '2') && (scopeIdPart[1] == '5'))
     {
-        OIC_LOG(ERROR, TAG, "encodeAddressForRFC6874 failed: Input string is already encoded");
+        OIC_LOG(ERROR, TAG, "OCEncodeAddressForRFC6874 failed: Input string is already encoded");
         return OC_STACK_ERROR;
     }
 
     // Fail if we don't have room for encoded string's two additional chars
     if (outputSize < (inputSize + 2))
     {
-        OIC_LOG(ERROR, TAG, "encodeAddressForRFC6874 failed: encoded output will not fit!");
+        OIC_LOG(ERROR, TAG, "OCEncodeAddressForRFC6874 failed: encoded output will not fit!");
         return OC_STACK_ERROR;
     }
 
     // Restore the null terminator with an escaped '%' character, per RFC 6874
     OICStrcpy(outputAddress, scopeIdPart - addressPart, addressPart);
-    strcat(outputAddress, "%25");
-    strcat(outputAddress, scopeIdPart);
+    OICStrcat(outputAddress, outputSize, "%25");
+    OICStrcat(outputAddress, outputSize, scopeIdPart);
+
+    return OC_STACK_OK;
+}
+
+OCStackResult OCDecodeAddressForRFC6874(char *outputAddress,
+                                        size_t outputSize,
+                                        const char *inputAddress,
+                                        const char *end)
+{
+    VERIFY_NON_NULL(inputAddress,  FATAL, OC_STACK_INVALID_PARAM);
+    VERIFY_NON_NULL(outputAddress, FATAL, OC_STACK_INVALID_PARAM);
+
+    if (NULL == end)
+    {
+        end = inputAddress + strlen(inputAddress);
+    }
+    size_t inputLength = end - inputAddress;
+
+    const char *percent = strchr(inputAddress, '%');
+    if (!percent || (percent > end))
+    {
+        OICStrcpyPartial(outputAddress, outputSize, inputAddress, inputLength);
+    }
+    else
+    {
+        if (percent[1] != '2' || percent[2] != '5')
+        {
+            return OC_STACK_INVALID_URI;
+        }
+
+        int addrlen = percent - inputAddress + 1;
+        OICStrcpyPartial(outputAddress, outputSize, inputAddress, addrlen);
+        OICStrcpyPartial(outputAddress + addrlen, outputSize - addrlen,
+                         percent + 3, end - percent - 3);
+    }
 
     return OC_STACK_OK;
 }
 
+#ifdef WITH_PRESENCE
 /**
  * The cononical presence allows constructed URIs to be string compared.
  *
  * requestUri must be a char array of size CA_MAX_URI_LENGTH
  */
-static int FormCanonicalPresenceUri(const CAEndpoint_t *endpoint, char *resourceUri,
+static int FormCanonicalPresenceUri(const CAEndpoint_t *endpoint,
                                     char *presenceUri, bool isMulticast)
 {
     VERIFY_NON_NULL(endpoint   , FATAL, OC_STACK_INVALID_PARAM);
-    VERIFY_NON_NULL(resourceUri, FATAL, OC_STACK_INVALID_PARAM);
     VERIFY_NON_NULL(presenceUri, FATAL, OC_STACK_INVALID_PARAM);
 
     if (isMulticast)
@@ -969,9 +1079,9 @@ static int FormCanonicalPresenceUri(const CAEndpoint_t *endpoint, char *resource
             {
                 char addressEncoded[CA_MAX_URI_LENGTH] = {0};
 
-                OCStackResult result = encodeAddressForRFC6874(addressEncoded,
-                                                               sizeof(addressEncoded),
-                                                               ep->addr);
+                OCStackResult result = OCEncodeAddressForRFC6874(addressEncoded,
+                                                                 sizeof(addressEncoded),
+                                                                 ep->addr);
 
                 if (OC_STACK_OK != result)
                 {
@@ -1054,13 +1164,13 @@ OCStackResult HandlePresenceResponse(const CAEndpoint_t *endpoint,
     }
 
     // check for unicast presence
-    uriLen = FormCanonicalPresenceUri(endpoint, OC_RSRVD_PRESENCE_URI, presenceUri,
+    uriLen = FormCanonicalPresenceUri(endpoint, presenceUri,
                                       responseInfo->isMulticast);
     if (uriLen < 0 || (size_t)uriLen >= sizeof (presenceUri))
     {
         return OC_STACK_INVALID_URI;
     }
-    OIC_LOG(ERROR, TAG, "check for unicast presence");
+    OIC_LOG(INFO, TAG, "check for unicast presence");
     cbNode = GetClientCB(NULL, 0, NULL, presenceUri);
     if (cbNode)
     {
@@ -1069,7 +1179,7 @@ OCStackResult HandlePresenceResponse(const CAEndpoint_t *endpoint,
     else
     {
         // check for multicast presence
-        OIC_LOG(ERROR, TAG, "check for multicast presence");
+        OIC_LOG(INFO, TAG, "check for multicast presence");
         cbNode = GetClientCB(NULL, 0, NULL, OC_RSRVD_PRESENCE_URI);
         if (cbNode)
         {
@@ -1079,7 +1189,8 @@ OCStackResult HandlePresenceResponse(const CAEndpoint_t *endpoint,
 
     if (!presenceSubscribe && !multicastPresenceSubscribe)
     {
-        OIC_LOG(ERROR, TAG, "Received a presence notification, but no callback, ignoring");
+        OIC_LOG(INFO, TAG, "Received a presence notification, "
+                "but need to register presence callback, ignoring");
         goto exit;
     }
 
@@ -1133,75 +1244,32 @@ OCStackResult HandlePresenceResponse(const CAEndpoint_t *endpoint,
             ResetPresenceTTL(cbNode, maxAge);
 
             cbNode->sequenceNumber = response.sequenceNumber;
-
-            // Ensure that a filter is actually applied.
-            if( resourceTypeName && cbNode->filterResourceType)
-            {
-                if(!findResourceType(cbNode->filterResourceType, resourceTypeName))
-                {
-                    goto exit;
-                }
-            }
         }
     }
     else
     {
         // This is the multicast case
-        OCMulticastNode* mcNode = NULL;
-        mcNode = GetMCPresenceNode(presenceUri);
-
-        if(mcNode != NULL)
+        OIC_LOG(INFO, TAG, "this is the multicast presence");
+        if (0 == maxAge)
         {
-            if(mcNode->nonce == response.sequenceNumber)
-            {
-                OIC_LOG(INFO, TAG, "No presence change (Multicast)");
-                goto exit;
-            }
-            mcNode->nonce = response.sequenceNumber;
-
-            if(maxAge == 0)
-            {
-                OIC_LOG(INFO, TAG, "Stopping presence");
-                response.result = OC_STACK_PRESENCE_STOPPED;
-            }
-        }
-        else
-        {
-            char* uri = OICStrdup(presenceUri);
-            if (!uri)
-            {
-                OIC_LOG(INFO, TAG,
-                    "No Memory for URI to store in the presence node");
-                result = OC_STACK_NO_MEMORY;
-                goto exit;
-            }
-
-            result = AddMCPresenceNode(&mcNode, uri, response.sequenceNumber);
-            if(result == OC_STACK_NO_MEMORY)
-            {
-                OIC_LOG(INFO, TAG,
-                    "No Memory for Multicast Presence Node");
-                OICFree(uri);
-                goto exit;
-            }
-            // presence node now owns uri
+            OIC_LOG(INFO, TAG, "Stopping presence");
+            response.result = OC_STACK_PRESENCE_STOPPED;
         }
+    }
 
-
-
-        // Ensure that a filter is actually applied.
-        if(resourceTypeName && cbNode->filterResourceType)
+    // Ensure that a filter is actually applied.
+    if (resourceTypeName && cbNode->filterResourceType)
+    {
+        OIC_LOG_V(INFO, TAG, "find resource type : %s", resourceTypeName);
+        if(!findResourceType(cbNode->filterResourceType, resourceTypeName))
         {
-            OIC_LOG_V(INFO, TAG, "find resource type : %s", resourceTypeName);
-            if(!findResourceType(cbNode->filterResourceType, resourceTypeName))
-            {
-                goto exit;
-            }
+            goto exit;
         }
     }
-    OIC_LOG(INFO, TAG, "Callback for presence");
 
+    OIC_LOG(INFO, TAG, "Before calling into application address space for presence");
     cbResult = cbNode->callBack(cbNode->context, cbNode->handle, &response);
+    OIC_LOG(INFO, TAG, "After calling into application address space for presence");
 
     if (cbResult == OC_STACK_DELETE_TRANSACTION)
     {
@@ -1212,27 +1280,80 @@ exit:
     OCPayloadDestroy(response.payload);
     return result;
 }
+#endif // WITH_PRESENCE
+
+OCStackResult HandleBatchResponse(char *requestUri, OCRepPayload **payload)
+{
+    if (requestUri && *payload)
+    {
+        char *interfaceName = NULL;
+        char *rtTypeName = NULL;
+        char *uriQuery = NULL;
+        char *uriWithoutQuery = NULL;
+        if (OC_STACK_OK == getQueryFromUri(requestUri, &uriQuery, &uriWithoutQuery))
+        {
+            if (OC_STACK_OK == ExtractFiltersFromQuery(uriQuery, &interfaceName, &rtTypeName))
+            {
+                if (interfaceName && (0 == strcmp(OC_RSRVD_INTERFACE_BATCH, interfaceName)))
+                {
+                    char *uri = (*payload)->uri;
+                    if (uri && 0 != strcmp(uriWithoutQuery, uri))
+                    {
+                        OCRepPayload *newPayload = OCRepPayloadCreate();
+                        if (newPayload)
+                        {
+                            OCRepPayloadSetUri(newPayload, uri);
+                            newPayload->next = *payload;
+                            *payload = newPayload;
+                        }
+                    }
+                }
+            }
+        }
+
+        OICFree(interfaceName);
+        OICFree(rtTypeName);
+        OICFree(uriQuery);
+        OICFree(uriWithoutQuery);
+        return OC_STACK_OK;
+    }
+    return OC_STACK_INVALID_PARAM;
+}
 
 void OCHandleResponse(const CAEndpoint_t* endPoint, const CAResponseInfo_t* responseInfo)
 {
+    OIC_TRACE_MARK(%s:OCHandleResponse:%s, TAG, responseInfo->info.resourceUri);
     OIC_LOG(DEBUG, TAG, "Enter OCHandleResponse");
 
+#ifdef WITH_PRESENCE
     if(responseInfo->info.resourceUri &&
         strcmp(responseInfo->info.resourceUri, OC_RSRVD_PRESENCE_URI) == 0)
     {
         HandlePresenceResponse(endPoint, responseInfo);
         return;
     }
+#endif
 
     ClientCB *cbNode = GetClientCB(responseInfo->info.token,
             responseInfo->info.tokenLength, NULL, NULL);
 
-    ResourceObserver * observer = GetObserverUsingToken (responseInfo->info.token,
-            responseInfo->info.tokenLength);
-
     if(cbNode)
     {
         OIC_LOG(INFO, TAG, "There is a cbNode associated with the response token");
+#ifdef __TIZENRT__
+        // check obs header option
+        bool obsHeaderOpt = false;
+        CAHeaderOption_t *options = responseInfo->info.options;
+        for (uint8_t i = 0; i< responseInfo->info.numOptions; i++)
+        {
+            if (options && options[i].protocolID == CA_COAP_ID &&
+                           options[i].optionID == COAP_OPTION_OBSERVE)
+            {
+                obsHeaderOpt = true;
+                break;
+            }
+        }
+#endif
         if(responseInfo->result == CA_EMPTY)
         {
             OIC_LOG(INFO, TAG, "Receiving A ACK/RESET for this token");
@@ -1248,33 +1369,60 @@ void OCHandleResponse(const CAEndpoint_t* endPoint, const CAResponseInfo_t* resp
         else if(responseInfo->result == CA_RETRANSMIT_TIMEOUT)
         {
             OIC_LOG(INFO, TAG, "Receiving A Timeout for this token");
-            OIC_LOG(INFO, TAG, "Calling into application address space");
 
             OCClientResponse response =
                 {.devAddr = {.adapter = OC_DEFAULT_ADAPTER}};
             CopyEndpointToDevAddr(endPoint, &response.devAddr);
             FixUpClientResponse(&response);
-            response.resourceUri = responseInfo->info.resourceUri;
+            response.resourceUri = OICStrdup(responseInfo->info.resourceUri);
             memcpy(response.identity.id, responseInfo->info.identity.id,
                                                 sizeof (response.identity.id));
             response.identity.id_length = responseInfo->info.identity.id_length;
 
             response.result = CAResponseToOCStackResult(responseInfo->result);
+            OIC_LOG(INFO, TAG, "Before calling into application address space for reTrans timeout");
             cbNode->callBack(cbNode->context,
                     cbNode->handle, &response);
+            OIC_LOG(INFO, TAG, "After calling into application address space for reTrans timeout");
+            FindAndDeleteClientCB(cbNode);
+            OICFree((void *)response.resourceUri);
+        }
+#ifdef __TIZENRT__
+        else if ((cbNode->method == OC_REST_OBSERVE || cbNode->method == OC_REST_OBSERVE_ALL)
+                && (responseInfo->result == CA_CONTENT) && !obsHeaderOpt)
+        {
+            OCClientResponse response =
+                {.devAddr = {.adapter = OC_DEFAULT_ADAPTER}};
+            CopyEndpointToDevAddr(endPoint, &response.devAddr);
+            FixUpClientResponse(&response);
+            response.resourceUri =  OICStrdup(responseInfo->info.resourceUri);
+            memcpy(response.identity.id, responseInfo->info.identity.id,
+                                    sizeof (response.identity.id));
+            response.identity.id_length = responseInfo->info.identity.id_length;
+            response.result = OC_STACK_UNAUTHORIZED_REQ;
+
+            OIC_LOG(INFO, TAG, "Before calling into application address space for observe resp");
+            cbNode->callBack(cbNode->context,
+                             cbNode->handle,
+                             &response);
+            OIC_LOG(INFO, TAG, "After calling into application address space for observe resp");
+
             FindAndDeleteClientCB(cbNode);
+            OICFree(response.resourceUri);
         }
+#endif
         else
         {
             OIC_LOG(INFO, TAG, "This is a regular response, A client call back is found");
-            OIC_LOG(INFO, TAG, "Calling into application address space");
 
-            OCClientResponse response =
-                {.devAddr = {.adapter = OC_DEFAULT_ADAPTER}};
+            OCClientResponse response;
+            memset(&response, 0, sizeof(OCClientResponse));
+            response.devAddr.adapter = OC_DEFAULT_ADAPTER;
+
             response.sequenceNumber = MAX_SEQUENCE_NUMBER + 1;
             CopyEndpointToDevAddr(endPoint, &response.devAddr);
             FixUpClientResponse(&response);
-            response.resourceUri = responseInfo->info.resourceUri;
+            response.resourceUri = OICStrdup(responseInfo->info.resourceUri);
             memcpy(response.identity.id, responseInfo->info.identity.id,
                                                 sizeof (response.identity.id));
             response.identity.id_length = responseInfo->info.identity.id_length;
@@ -1305,12 +1453,13 @@ void OCHandleResponse(const CAEndpoint_t* endPoint, const CAResponseInfo_t* resp
 #endif
                     else if (strcmp(cbNode->requestUri, OC_RSRVD_DEVICE_URI) == 0)
                     {
-                        type = PAYLOAD_TYPE_DEVICE;
+                        type = PAYLOAD_TYPE_REPRESENTATION;
                     }
                     else if (strcmp(cbNode->requestUri, OC_RSRVD_PLATFORM_URI) == 0)
                     {
-                        type = PAYLOAD_TYPE_PLATFORM;
+                        type = PAYLOAD_TYPE_REPRESENTATION;
                     }
+
 #ifdef ROUTING_GATEWAY
                     else if (strcmp(cbNode->requestUri, OC_RSRVD_GATEWAY_URI) == 0)
                     {
@@ -1319,10 +1468,10 @@ void OCHandleResponse(const CAEndpoint_t* endPoint, const CAResponseInfo_t* resp
 #endif
                     else if (strcmp(cbNode->requestUri, OC_RSRVD_RD_URI) == 0)
                     {
-                        type = PAYLOAD_TYPE_RD;
+                        type = PAYLOAD_TYPE_REPRESENTATION;
                     }
 #ifdef TCP_ADAPTER
-                    else if (strcmp(cbNode->requestUri, KEEPALIVE_RESOURCE_URI) == 0)
+                    else if (strcmp(cbNode->requestUri, OC_RSRVD_KEEPALIVE_URI) == 0)
                     {
                         type = PAYLOAD_TYPE_REPRESENTATION;
                     }
@@ -1331,6 +1480,7 @@ void OCHandleResponse(const CAEndpoint_t* endPoint, const CAResponseInfo_t* resp
                     {
                         OIC_LOG_V(ERROR, TAG, "Unknown Payload type in Discovery: %d %s",
                                 cbNode->method, cbNode->requestUri);
+                        OICFree((void *)response.resourceUri);
                         return;
                     }
                 }
@@ -1341,25 +1491,26 @@ void OCHandleResponse(const CAEndpoint_t* endPoint, const CAResponseInfo_t* resp
                          cbNode->method == OC_REST_OBSERVE_ALL ||
                          cbNode->method == OC_REST_DELETE)
                 {
-                    char targetUri[MAX_URI_LENGTH];
-                    snprintf(targetUri, MAX_URI_LENGTH, "%s?rt=%s", OC_RSRVD_RD_URI,
-                            OC_RSRVD_RESOURCE_TYPE_RDPUBLISH);
-                    if (strcmp(targetUri, cbNode->requestUri) == 0)
-                    {
-                        type = PAYLOAD_TYPE_RD;
-                    }
-                    else if (strcmp(OC_RSRVD_PLATFORM_URI, cbNode->requestUri) == 0)
-                    {
-                        type = PAYLOAD_TYPE_PLATFORM;
-                    }
-                    else if (strcmp(OC_RSRVD_DEVICE_URI, cbNode->requestUri) == 0)
+                    if (cbNode->requestUri)
                     {
-                        type = PAYLOAD_TYPE_DEVICE;
+                        if (0 == strcmp(OC_RSRVD_PLATFORM_URI, cbNode->requestUri))
+                        {
+                            type = PAYLOAD_TYPE_REPRESENTATION;
+                        }
+                        else if (0 == strcmp(OC_RSRVD_DEVICE_URI, cbNode->requestUri))
+                        {
+                            type = PAYLOAD_TYPE_REPRESENTATION;
+                        }
+                        if (type == PAYLOAD_TYPE_INVALID)
+                        {
+                            OIC_LOG_V(INFO, TAG, "Assuming PAYLOAD_TYPE_REPRESENTATION: %d %s",
+                                    cbNode->method, cbNode->requestUri);
+                            type = PAYLOAD_TYPE_REPRESENTATION;
+                        }
                     }
-                    if (type == PAYLOAD_TYPE_INVALID)
+                    else
                     {
-                        OIC_LOG_V(INFO, TAG, "Assuming PAYLOAD_TYPE_REPRESENTATION: %d %s",
-                                cbNode->method, cbNode->requestUri);
+                        OIC_LOG(INFO, TAG, "No Request URI, PROXY URI");
                         type = PAYLOAD_TYPE_REPRESENTATION;
                     }
                 }
@@ -1367,17 +1518,28 @@ void OCHandleResponse(const CAEndpoint_t* endPoint, const CAResponseInfo_t* resp
                 {
                     OIC_LOG_V(ERROR, TAG, "Unknown Payload type: %d %s",
                             cbNode->method, cbNode->requestUri);
+                    OICFree((void *)response.resourceUri);
                     return;
                 }
 
-                if(OC_STACK_OK != OCParsePayload(&response.payload,
+                // In case of error, still want application to receive the error message.
+                if (OCResultToSuccess(response.result) || PAYLOAD_TYPE_REPRESENTATION == type)
+                {
+                    if(OC_STACK_OK != OCParsePayload(&response.payload,
                             type,
                             responseInfo->info.payload,
                             responseInfo->info.payloadSize))
+                    {
+                        OIC_LOG(ERROR, TAG, "Error converting payload");
+                        OCPayloadDestroy(response.payload);
+                        OICFree((void *)response.resourceUri);
+                        return;
+                    }
+                }
+                else
                 {
-                    OIC_LOG(ERROR, TAG, "Error converting payload");
-                    OCPayloadDestroy(response.payload);
-                    return;
+                    OICFree((void *)response.resourceUri);
+                    response.resourceUri = OICStrdup(cbNode->requestUri);
                 }
             }
 
@@ -1386,7 +1548,8 @@ void OCHandleResponse(const CAEndpoint_t* endPoint, const CAResponseInfo_t* resp
             {
                 int start = 0;
                 //First option always with option ID is COAP_OPTION_OBSERVE if it is available.
-                if(responseInfo->info.options[0].optionID == COAP_OPTION_OBSERVE)
+                if(responseInfo->info.options
+                   && responseInfo->info.options[0].optionID == COAP_OPTION_OBSERVE)
                 {
                     size_t i;
                     uint32_t observationOption;
@@ -1411,13 +1574,24 @@ void OCHandleResponse(const CAEndpoint_t* endPoint, const CAResponseInfo_t* resp
                 {
                     OIC_LOG(ERROR, TAG, "#header options are more than MAX_HEADER_OPTIONS");
                     OCPayloadDestroy(response.payload);
+                    OICFree((void *)response.resourceUri);
                     return;
                 }
 
-                for (uint8_t i = start; i < responseInfo->info.numOptions; i++)
+                if (response.numRcvdVendorSpecificHeaderOptions > 0)
                 {
-                    memcpy (&(response.rcvdVendorSpecificHeaderOptions[i-start]),
-                            &(responseInfo->info.options[i]), sizeof(OCHeaderOption));
+                    response.rcvdVendorSpecificHeaderOptions =
+                        (OCHeaderOption *) OICCalloc(response.numRcvdVendorSpecificHeaderOptions, sizeof(OCHeaderOption));
+                    if (NULL == response.rcvdVendorSpecificHeaderOptions)
+                    {
+                        OIC_LOG(ERROR, TAG, "Failed to allocate memory for vendor header options");
+                        OCPayloadDestroy(response.payload);
+                        OICFree((void *)response.resourceUri);
+                        return;
+                    }
+
+                    memcpy(response.rcvdVendorSpecificHeaderOptions, responseInfo->info.options + start,
+                        response.numRcvdVendorSpecificHeaderOptions*sizeof(OCHeaderOption));
                 }
             }
 
@@ -1431,9 +1605,59 @@ void OCHandleResponse(const CAEndpoint_t* endPoint, const CAResponseInfo_t* resp
             }
             else
             {
+#ifdef RD_CLIENT
+                if (cbNode->requestUri)
+                {
+                    // if request uri is '/oic/rd', update ins value of resource.
+                    char *targetUri = strstr(cbNode->requestUri, OC_RSRVD_RD_URI);
+                    if (targetUri)
+                    {
+                        OCUpdateResourceInsWithResponse(cbNode->requestUri, &response);
+                    }
+                }
+#endif
+                // set remoteID(device ID) into OCClientResponse callback parameter
+                if (OC_REST_DISCOVER == cbNode->method)
+                {
+                    OIC_LOG(INFO, TAG, "cbNode method is OC_REST_DISCOVER");
+                    OCDiscoveryPayload *payload = (OCDiscoveryPayload*) response.payload;
+                    // Payload can be empty in case of error message.
+                    if (payload && payload->sid)
+                    {
+                        OICStrcpy(response.devAddr.remoteId, sizeof(response.devAddr.remoteId),
+                                  payload->sid);
+                        OIC_LOG_V(INFO_PRIVATE, TAG, "Device ID of response : %s",
+                                  response.devAddr.remoteId);
+                    }
+
+                    if(NULL == response.resourceUri)
+                    {
+                        response.resourceUri = OICStrdup(cbNode->requestUri);
+                    }
+                }
+#ifdef TCP_ADAPTER
+                if (cbNode->requestUri)
+                {
+                    OIC_LOG_V(INFO, TAG, "cbNode requestUri is %s", cbNode->requestUri);
+                    if (cbNode->method == OC_REST_POST &&
+                            strcmp(cbNode->requestUri, OC_RSRVD_KEEPALIVE_URI) == 0)
+                    {
+                        OCHandleKeepAliveResponse(endPoint, response.payload);
+                    }
+                }
+#endif
+                if (response.payload && response.payload->type == PAYLOAD_TYPE_REPRESENTATION)
+                {
+                    OIC_LOG(INFO, TAG, "Handle batch response");
+                    HandleBatchResponse(cbNode->requestUri, (OCRepPayload **)&response.payload);
+                }
+
+                OIC_LOG(INFO, TAG, "Before calling into application address space for handleResponse");
                 OCStackApplicationResult appFeedback = cbNode->callBack(cbNode->context,
                                                                         cbNode->handle,
                                                                         &response);
+                OIC_LOG(INFO, TAG, "After calling into application address space for handleResponse");
+
                 cbNode->sequenceNumber = response.sequenceNumber;
 
                 if (appFeedback == OC_STACK_DELETE_TRANSACTION)
@@ -1451,15 +1675,24 @@ void OCHandleResponse(const CAEndpoint_t* endPoint, const CAResponseInfo_t* resp
             //Need to send ACK when the response is CON
             if(responseInfo->info.type == CA_MSG_CONFIRM)
             {
-                SendDirectStackResponse(endPoint, responseInfo->info.messageId, CA_EMPTY,
+                if (!(endPoint->adapter & CA_ADAPTER_TCP))
+                {
+                    OIC_LOG(INFO, TAG, "Received a confirmable message. Sending EMPTY");
+                    SendDirectStackResponse(endPoint, responseInfo->info.messageId, CA_EMPTY,
                         CA_MSG_ACKNOWLEDGE, 0, NULL, NULL, 0, NULL, CA_RESPONSE_FOR_RES);
+                }
             }
 
+            OICFree((void *)response.resourceUri);
             OCPayloadDestroy(response.payload);
+            OICFree(response.rcvdVendorSpecificHeaderOptions);
         }
         return;
     }
 
+    ResourceObserver * observer = GetObserverUsingToken (responseInfo->info.token,
+            responseInfo->info.tokenLength);
+
     if(observer)
     {
         OIC_LOG(INFO, TAG, "There is an observer associated with the response token");
@@ -1485,6 +1718,8 @@ void OCHandleResponse(const CAEndpoint_t* endPoint, const CAResponseInfo_t* resp
             OCStackFeedBack(responseInfo->info.token, responseInfo->info.tokenLength,
                     OC_OBSERVER_FAILED_COMM);
         }
+
+        FreeObserver(observer);
         return;
     }
 
@@ -1500,9 +1735,13 @@ void OCHandleResponse(const CAEndpoint_t* endPoint, const CAResponseInfo_t* resp
             }
             else
             {
-                OIC_LOG(INFO, TAG, "Received a message without callbacks. Sending RESET");
-                SendDirectStackResponse(endPoint, responseInfo->info.messageId, CA_EMPTY,
-                                        CA_MSG_RESET, 0, NULL, NULL, 0, NULL, CA_RESPONSE_FOR_RES);
+                if (!(endPoint->adapter & CA_ADAPTER_TCP))
+                {
+                    OIC_LOG(INFO, TAG, "Received a message without callbacks. Sending RESET");
+                    SendDirectStackResponse(endPoint, responseInfo->info.messageId, CA_EMPTY,
+                                            CA_MSG_RESET, 0, NULL, NULL, 0, NULL,
+                                            CA_RESPONSE_FOR_RES);
+                }
             }
         }
 
@@ -1532,6 +1771,7 @@ void HandleCAResponses(const CAEndpoint_t* endPoint, const CAResponseInfo_t* res
     VERIFY_NON_NULL_NR(responseInfo, FATAL);
 
     OIC_LOG(INFO, TAG, "Enter HandleCAResponses");
+    OIC_TRACE_BEGIN(%s:HandleCAResponses, TAG);
 
 #if defined (ROUTING_GATEWAY) || defined (ROUTING_EP)
 #ifdef ROUTING_GATEWAY
@@ -1547,6 +1787,7 @@ void HandleCAResponses(const CAEndpoint_t* endPoint, const CAResponseInfo_t* res
     if(ret != OC_STACK_OK || !needRIHandling)
     {
         OIC_LOG_V(INFO, TAG, "Routing status![%d]. Not forwarding to RI", ret);
+        OIC_TRACE_END();
         return;
     }
 #endif
@@ -1562,7 +1803,7 @@ void HandleCAResponses(const CAEndpoint_t* endPoint, const CAResponseInfo_t* res
 #endif
 
     OCHandleResponse(endPoint, responseInfo);
-
+    OIC_TRACE_END();
     OIC_LOG(INFO, TAG, "Exit HandleCAResponses");
 }
 
@@ -1572,19 +1813,11 @@ void HandleCAResponses(const CAEndpoint_t* endPoint, const CAResponseInfo_t* res
  */
 void HandleCAErrorResponse(const CAEndpoint_t *endPoint, const CAErrorInfo_t *errorInfo)
 {
-    OIC_LOG(INFO, TAG, "Enter HandleCAErrorResponse");
-
-    if (NULL == endPoint)
-    {
-        OIC_LOG(ERROR, TAG, "endPoint is NULL");
-        return;
-    }
+    VERIFY_NON_NULL_NR(endPoint, FATAL);
+    VERIFY_NON_NULL_NR(errorInfo, FATAL);
 
-    if (NULL == errorInfo)
-    {
-        OIC_LOG(ERROR, TAG, "errorInfo is NULL");
-        return;
-    }
+    OIC_LOG(INFO, TAG, "Enter HandleCAErrorResponse");
+    OIC_TRACE_BEGIN(%s:HandleCAErrorResponse, TAG);
 
     ClientCB *cbNode = GetClientCB(errorInfo->info.token,
                                    errorInfo->info.tokenLength, NULL, NULL);
@@ -1597,12 +1830,28 @@ void HandleCAErrorResponse(const CAEndpoint_t *endPoint, const CAErrorInfo_t *er
         memcpy(response.identity.id, errorInfo->info.identity.id,
                sizeof (response.identity.id));
         response.identity.id_length = errorInfo->info.identity.id_length;
-        response.result = CAResultToOCStackResult(errorInfo->result);
+        response.result = CAResultToOCResult(errorInfo->result);
 
+        OIC_LOG(INFO, TAG, "Before calling into application address space for error response");
         cbNode->callBack(cbNode->context, cbNode->handle, &response);
+        OIC_LOG(INFO, TAG, "After calling into application address space for error response");
+    }
+
+    ResourceObserver *observer = GetObserverUsingToken(errorInfo->info.token,
+                                                       errorInfo->info.tokenLength);
+    if (observer)
+    {
+        OIC_LOG(INFO, TAG, "Receiving communication error for an observer");
+        OCStackResult result = CAResultToOCResult(errorInfo->result);
+        if (OC_STACK_COMM_ERROR == result)
+        {
+            OCStackFeedBack(errorInfo->info.token, errorInfo->info.tokenLength,
+                            OC_OBSERVER_FAILED_COMM);
+        }
     }
 
     OIC_LOG(INFO, TAG, "Exit HandleCAErrorResponse");
+    OIC_TRACE_END();
 }
 
 /*
@@ -1617,9 +1866,14 @@ OCStackResult SendDirectStackResponse(const CAEndpoint_t* endPoint, const uint16
         CADataType_t dataType)
 {
     OIC_LOG(DEBUG, TAG, "Entering SendDirectStackResponse");
-    CAResponseInfo_t respInfo = {
-        .result = responseResult
-    };
+
+    if (endPoint->flags & CA_MULTICAST)
+    {
+        OIC_LOG(ERROR, TAG, "It is unnecessary to respond to a multicast request");
+        return OC_STACK_OK;
+    }
+
+    CAResponseInfo_t respInfo = { .result = responseResult };
     respInfo.info.messageId = coapID;
     respInfo.info.numOptions = numOptions;
 
@@ -1647,6 +1901,8 @@ OCStackResult SendDirectStackResponse(const CAEndpoint_t* endPoint, const uint16
     if(OC_STACK_OK != result)
     {
         OIC_LOG_V(ERROR, TAG, "Add routing option failed [%d]", result);
+        OICFree (respInfo.info.resourceUri);
+        OICFree (respInfo.info.options);
         return result;
     }
     if (doPost)
@@ -1671,6 +1927,9 @@ OCStackResult SendDirectStackResponse(const CAEndpoint_t* endPoint, const uint16
             if (NULL == reqInfo.info.options)
             {
                 OIC_LOG(ERROR, TAG, "Calloc failed");
+                OICFree (reqInfo.info.resourceUri);
+                OICFree (respInfo.info.resourceUri);
+                OICFree (respInfo.info.options);
                 return OC_STACK_NO_MEMORY;
             }
             memcpy (reqInfo.info.options, respInfo.info.options,
@@ -1774,17 +2033,9 @@ OCStackResult HandleStackRequests(OCServerProtocolRequest * protocolRequest)
 
 void OCHandleRequests(const CAEndpoint_t* endPoint, const CARequestInfo_t* requestInfo)
 {
+    OIC_TRACE_MARK(%s:OCHandleRequests:%s, TAG, requestInfo->info.resourceUri);
     OIC_LOG(DEBUG, TAG, "Enter OCHandleRequests");
 
-#ifdef TCP_ADAPTER
-    if (requestInfo->info.resourceUri &&
-            strcmp(requestInfo->info.resourceUri, KEEPALIVE_RESOURCE_URI) == 0)
-    {
-        HandleKeepAliveRequest(endPoint, requestInfo);
-        return;
-    }
-#endif
-
     OCStackResult requestResult = OC_STACK_ERROR;
 
     if(myStackMode == OC_CLIENT)
@@ -1952,10 +2203,20 @@ void OCHandleRequests(const CAEndpoint_t* endPoint, const CARequestInfo_t* reque
         OICFree(serverRequest.requestToken);
         return;
     }
+
     serverRequest.numRcvdVendorSpecificHeaderOptions = tempNum;
-    if (serverRequest.numRcvdVendorSpecificHeaderOptions)
+    if (serverRequest.numRcvdVendorSpecificHeaderOptions && requestInfo->info.options)
     {
-        memcpy (&(serverRequest.rcvdVendorSpecificHeaderOptions), requestInfo->info.options,
+        serverRequest.rcvdVendorSpecificHeaderOptions = (OCHeaderOption*) OICCalloc(tempNum, sizeof(OCHeaderOption));
+        if (NULL == serverRequest.rcvdVendorSpecificHeaderOptions)
+        {
+            OIC_LOG(ERROR, TAG, "Failed to allocated memory to vnd header options!");
+            OICFree(serverRequest.payload);
+            OICFree(serverRequest.requestToken);
+            return;
+        }
+
+        memcpy (serverRequest.rcvdVendorSpecificHeaderOptions, requestInfo->info.options,
             sizeof(CAHeaderOption_t)*tempNum);
     }
 
@@ -1971,10 +2232,35 @@ void OCHandleRequests(const CAEndpoint_t* endPoint, const CARequestInfo_t* reque
                                     CA_RESPONSE_DATA);
         }
     }
+#ifndef __TIZENRT__
+    if (requestResult == OC_STACK_RESOURCE_ERROR
+            && serverRequest.observationOption == OC_OBSERVE_REGISTER)
+    {
+        OIC_LOG_V(ERROR, TAG, "Observe Registration failed due to resource error");
+    }
+#else
+    if (serverRequest.observationOption == OC_OBSERVE_REGISTER)
+    {
+        if (requestResult == OC_STACK_RESOURCE_ERROR)
+        {
+            OIC_LOG_V(ERROR, TAG, "Observe Registration failed due to resource error");
+        }
+        else if (!OCResultToSuccess(requestResult))
+        {
+            DeleteObserverUsingToken(requestInfo->info.token, requestInfo->info.tokenLength);
+        }
+    }
+#endif
     else if(!OCResultToSuccess(requestResult))
     {
         OIC_LOG_V(ERROR, TAG, "HandleStackRequests failed. error: %d", requestResult);
 
+        // Delete observer node if it is OBSERVE failure from app
+        if (serverRequest.observationOption == OC_OBSERVE_REGISTER)
+        {
+            DeleteObserverUsingToken(requestInfo->info.token, requestInfo->info.tokenLength);
+        }
+
         CAResponseResult_t stackResponse =
             OCToCAStackResult(requestResult, serverRequest.method);
 
@@ -1988,6 +2274,7 @@ void OCHandleRequests(const CAEndpoint_t* endPoint, const CARequestInfo_t* reque
     // The token is copied in there, and is thus still owned by this function.
     OICFree(serverRequest.payload);
     OICFree(serverRequest.requestToken);
+    OICFree(serverRequest.rcvdVendorSpecificHeaderOptions);
     OIC_LOG(INFO, TAG, "Exit OCHandleRequests");
 }
 
@@ -1995,15 +2282,18 @@ void OCHandleRequests(const CAEndpoint_t* endPoint, const CARequestInfo_t* reque
 void HandleCARequests(const CAEndpoint_t* endPoint, const CARequestInfo_t* requestInfo)
 {
     OIC_LOG(INFO, TAG, "Enter HandleCARequests");
+    OIC_TRACE_BEGIN(%s:HandleCARequests, TAG);
     if(!endPoint)
     {
         OIC_LOG(ERROR, TAG, "endPoint is NULL");
+        OIC_TRACE_END();
         return;
     }
 
     if(!requestInfo)
     {
         OIC_LOG(ERROR, TAG, "requestInfo is NULL");
+        OIC_TRACE_END();
         return;
     }
 
@@ -2023,6 +2313,7 @@ void HandleCARequests(const CAEndpoint_t* endPoint, const CARequestInfo_t* reque
     if(OC_STACK_OK != ret || !needRIHandling)
     {
         OIC_LOG_V(INFO, TAG, "Routing status![%d]. Not forwarding to RI", ret);
+        OIC_TRACE_END();
         return;
     }
 #endif
@@ -2058,42 +2349,7 @@ void HandleCARequests(const CAEndpoint_t* endPoint, const CARequestInfo_t* reque
         OCHandleRequests(endPoint, requestInfo);
     }
     OIC_LOG(INFO, TAG, "Exit HandleCARequests");
-}
-
-bool validatePlatformInfo(OCPlatformInfo info)
-{
-
-    if (!info.platformID)
-    {
-        OIC_LOG(ERROR, TAG, "No platform ID found.");
-        return false;
-    }
-
-    if (info.manufacturerName)
-    {
-        size_t lenManufacturerName = strlen(info.manufacturerName);
-
-        if(lenManufacturerName == 0 || lenManufacturerName > MAX_MANUFACTURER_NAME_LENGTH)
-        {
-            OIC_LOG(ERROR, TAG, "Manufacturer name fails length requirements.");
-            return false;
-        }
-    }
-    else
-    {
-        OIC_LOG(ERROR, TAG, "No manufacturer name present");
-        return false;
-    }
-
-    if (info.manufacturerUrl)
-    {
-        if(strlen(info.manufacturerUrl) > MAX_MANUFACTURER_URL_LENGTH)
-        {
-            OIC_LOG(ERROR, TAG, "Manufacturer url fails length requirements.");
-            return false;
-        }
-    }
-    return true;
+    OIC_TRACE_END();
 }
 
 //-----------------------------------------------------------------------------
@@ -2126,6 +2382,16 @@ OCStackResult OCInit(const char *ipAddr, uint16_t port, OCMode mode)
 
 OCStackResult OCInit1(OCMode mode, OCTransportFlags serverFlags, OCTransportFlags clientFlags)
 {
+    OC_UNUSED(serverFlags);
+    OC_UNUSED(clientFlags);
+
+    OIC_LOG(DEBUG, TAG, "call OCInit1");
+    return OCInit2(mode, OC_DEFAULT_FLAGS, OC_DEFAULT_FLAGS, OC_DEFAULT_ADAPTER);
+}
+
+OCStackResult OCInit2(OCMode mode, OCTransportFlags serverFlags, OCTransportFlags clientFlags,
+                      OCTransportAdapter transportType)
+{
     if(stackState == OC_STACK_INITIALIZED)
     {
         OIC_LOG(INFO, TAG, "Subsequent calls to OCInit() without calling \
@@ -2184,10 +2450,17 @@ OCStackResult OCInit1(OCMode mode, OCTransportFlags serverFlags, OCTransportFlag
     defaultDeviceHandler = NULL;
     defaultDeviceHandlerCallbackParameter = NULL;
 
-    result = CAResultToOCResult(CAInitialize());
+    result = InitializeScheduleResourceList();
+    VERIFY_SUCCESS(result, OC_STACK_OK);
+
+    result = CAResultToOCResult(CAInitialize((CATransportAdapter_t)transportType));
+    VERIFY_SUCCESS(result, OC_STACK_OK);
+
+    result = CAResultToOCResult(OCSelectNetwork(transportType));
     VERIFY_SUCCESS(result, OC_STACK_OK);
 
-    result = CAResultToOCResult(OCSelectNetwork());
+    result = CAResultToOCResult(CARegisterNetworkMonitorHandler(
+      OCDefaultAdapterStateChangedHandler, OCDefaultConnectionStateChangedHandler));
     VERIFY_SUCCESS(result, OC_STACK_OK);
 
     switch (myStackMode)
@@ -2215,7 +2488,7 @@ OCStackResult OCInit1(OCMode mode, OCTransportFlags serverFlags, OCTransportFlag
     VERIFY_SUCCESS(result, OC_STACK_OK);
 
 #ifdef TCP_ADAPTER
-    CARegisterKeepAliveHandler(HandleKeepAliveConnCB);
+    CARegisterKeepAliveHandler(OCHandleKeepAliveConnCB);
 #endif
 
 #ifdef WITH_PRESENCE
@@ -2250,14 +2523,17 @@ OCStackResult OCInit1(OCMode mode, OCTransportFlags serverFlags, OCTransportFlag
 #ifdef TCP_ADAPTER
     if (result == OC_STACK_OK)
     {
-        result = InitializeKeepAlive(myStackMode);
+        result = OCInitializeKeepAlive(myStackMode);
     }
 #endif
 
+    InitializeObserverList();
+
 exit:
     if(result != OC_STACK_OK)
     {
         OIC_LOG(ERROR, TAG, "Stack initialization error");
+        TerminateScheduleResourceList();
         deleteAllResources();
         CATerminate();
         stackState = OC_STACK_UNINITIALIZED;
@@ -2276,16 +2552,24 @@ OCStackResult OCStop()
     }
     else if (stackState != OC_STACK_INITIALIZED)
     {
-        OIC_LOG(ERROR, TAG, "Stack not initialized");
+        OIC_LOG(INFO, TAG, "Stack not initialized");
         return OC_STACK_ERROR;
     }
 
+    // unset cautil config
+    CAUtilConfig_t configs = {(CATransportBTFlags_t)CA_DEFAULT_BT_FLAGS};
+    CAUtilSetBTConfigure(configs);
+
     stackState = OC_STACK_UNINIT_IN_PROGRESS;
 
+    CAUnregisterNetworkMonitorHandler(OCDefaultAdapterStateChangedHandler,
+                                      OCDefaultConnectionStateChangedHandler);
+
 #ifdef WITH_PRESENCE
     // Ensure that the TTL associated with ANY and ALL presence notifications originating from
     // here send with the code "OC_STACK_PRESENCE_STOPPED" result.
     presenceResource.presenceTTL = 0;
+    presenceState = OC_PRESENCE_UNINITIALIZED;
 #endif // WITH_PRESENCE
 
 #ifdef ROUTING_GATEWAY
@@ -2296,23 +2580,25 @@ OCStackResult OCStop()
 #endif
 
 #ifdef TCP_ADAPTER
-    TerminateKeepAlive(myStackMode);
+    OCTerminateKeepAlive(myStackMode);
 #endif
 
-    // Free memory dynamically allocated for resources
-    deleteAllResources();
-    DeleteDeviceInfo();
-    DeletePlatformInfo();
-    CATerminate();
+    TerminateScheduleResourceList();
     // Remove all observers
     DeleteObserverList();
+    // Free memory dynamically allocated for resources
+    deleteAllResources();
     // Remove all the client callbacks
     DeleteClientCBList();
+    // Terminate connectivity-abstraction layer.
+    CATerminate();
 
     // De-init the SRM Policy Engine
     // TODO after BeachHead delivery: consolidate into single SRMDeInit()
     SRMDeInitPolicyEngine();
 
+    // Destroy Observer List Mutex
+    TerminateObserverList();
 
     stackState = OC_STACK_UNINITIALIZED;
     return OC_STACK_OK;
@@ -2359,28 +2645,12 @@ CAMessageType_t qualityOfServiceToMessageType(OCQualityOfService qos)
     }
 }
 
-/**
- *  A request uri consists of the following components in order:
- *                              example
- *  optionally one of
- *      CoAP over UDP prefix    "coap://"
- *      CoAP over TCP prefix    "coap+tcp://"
- *      CoAP over DTLS prefix   "coaps://"
- *      CoAP over TLS prefix    "coaps+tcp://"
- *  optionally one of
- *      IPv6 address            "[1234::5678]"
- *      IPv4 address            "192.168.1.1"
- *  optional port               ":5683"
- *  resource uri                "/oc/core..."
- *
- *  for PRESENCE requests, extract resource type.
- */
-static OCStackResult ParseRequestUri(const char *fullUri,
-                                        OCTransportAdapter adapter,
-                                        OCTransportFlags flags,
-                                        OCDevAddr **devAddr,
-                                        char **resourceUri,
-                                        char **resourceType)
+OCStackResult ParseRequestUri(const char *fullUri,
+                              OCTransportAdapter adapter,
+                              OCTransportFlags flags,
+                              OCDevAddr **devAddr,
+                              char **resourceUri,
+                              char **resourceType)
 {
     VERIFY_NON_NULL(fullUri, FATAL, OC_STACK_INVALID_CALLBACK);
 
@@ -2421,8 +2691,8 @@ static OCStackResult ParseRequestUri(const char *fullUri,
     bool istcp = false;
     if (prefixLen)
     {
-        if (((prefixLen == sizeof(COAP_TCP) - 1) && (!strncmp(fullUri, COAP_TCP, prefixLen)))
-        || ((prefixLen == sizeof(COAPS_TCP) - 1) && (!strncmp(fullUri, COAPS_TCP, prefixLen))))
+        if (((prefixLen == sizeof(COAP_TCP_SCHEME) - 1) && (!strncmp(fullUri, COAP_TCP_SCHEME, prefixLen)))
+        || ((prefixLen == sizeof(COAPS_TCP_SCHEME) - 1) && (!strncmp(fullUri, COAPS_TCP_SCHEME, prefixLen))))
         {
             istcp = true;
         }
@@ -2513,7 +2783,15 @@ static OCStackResult ParseRequestUri(const char *fullUri,
         {
             return OC_STACK_NO_MEMORY;
         }
-        OICStrcpyPartial(da->addr, sizeof(da->addr), start, len);
+
+        // Decode address per RFC 6874.
+        result = OCDecodeAddressForRFC6874(da->addr, sizeof(da->addr), start, end);
+        if (result != OC_STACK_OK)
+        {
+             OICFree(*devAddr);
+             return result;
+        }
+
         da->port = port;
         da->adapter = adapter;
         da->flags = flags;
@@ -2547,7 +2825,7 @@ static OCStackResult ParseRequestUri(const char *fullUri,
                 result = OC_STACK_NO_MEMORY;
                 goto error;
             }
-            strcpy(*resourceUri, slash);
+            OICStrcpy(*resourceUri, (ulen + 1), slash);
         }
         // resource type
         if (type && resourceType)
@@ -2582,14 +2860,14 @@ error:
     return result;
 }
 
+#ifdef WITH_PRESENCE
 static OCStackResult OCPreparePresence(CAEndpoint_t *endpoint,
-                                       char *resourceUri,
                                        char **requestUri,
                                        bool isMulticast)
 {
     char uri[CA_MAX_URI_LENGTH];
 
-    FormCanonicalPresenceUri(endpoint, resourceUri, uri, isMulticast);
+    FormCanonicalPresenceUri(endpoint, uri, isMulticast);
 
     *requestUri = OICStrdup(uri);
     if (!*requestUri)
@@ -2599,6 +2877,7 @@ static OCStackResult OCPreparePresence(CAEndpoint_t *endpoint,
 
     return OC_STACK_OK;
 }
+#endif // WITH_PRESENCE
 
 /**
  * Discover or Perform requests on a specified resource
@@ -2614,12 +2893,34 @@ OCStackResult OCDoResource(OCDoHandle *handle,
                             OCHeaderOption *options,
                             uint8_t numOptions)
 {
+    OCStackResult ret = OCDoRequest(handle, method, requestUri,destination, payload,
+                connectivityType, qos, cbData, options, numOptions);
+
+    // This is the owner of the payload object, so we free it
+    OCPayloadDestroy(payload);
+    return ret;
+}
+
+/**
+ * Discover or Perform requests on a specified resource
+ */
+OCStackResult OCDoRequest(OCDoHandle *handle,
+                            OCMethod method,
+                            const char *requestUri,
+                            const OCDevAddr *destination,
+                            OCPayload* payload,
+                            OCConnectivityType connectivityType,
+                            OCQualityOfService qos,
+                            OCCallbackData *cbData,
+                            OCHeaderOption *options,
+                            uint8_t numOptions)
+{
     OIC_LOG(INFO, TAG, "Entering OCDoResource");
+    OIC_TRACE_BEGIN(%s:OCDoRequest, TAG);
 
     // Validate input parameters
     VERIFY_NON_NULL(cbData, FATAL, OC_STACK_INVALID_CALLBACK);
     VERIFY_NON_NULL(cbData->cb, FATAL, OC_STACK_INVALID_CALLBACK);
-    VERIFY_NON_NULL(requestUri , FATAL, OC_STACK_INVALID_URI);
 
     OCStackResult result = OC_STACK_ERROR;
     CAResult_t caResult;
@@ -2645,10 +2946,18 @@ OCStackResult OCDoResource(OCDoHandle *handle,
     adapter = (OCTransportAdapter)(connectivityType >> CT_ADAPTER_SHIFT);
     flags = (OCTransportFlags)(connectivityType & CT_MASK_FLAGS);
 
-    result = ParseRequestUri(requestUri, adapter, flags, &devAddr, &resourceUri, &resourceType);
-    if (result != OC_STACK_OK)
+    if (requestUri)
+    {
+        result = ParseRequestUri(requestUri, adapter, flags, &devAddr, &resourceUri, &resourceType);
+        if (result != OC_STACK_OK)
+        {
+            OIC_LOG_V(DEBUG, TAG, "Unable to parse uri: %s", requestUri);
+            goto exit;
+        }
+    }
+    else if (!checkProxyUri(options, numOptions))
     {
-        OIC_LOG_V(DEBUG, TAG, "Unable to parse uri: %s", requestUri);
+        OIC_LOG(ERROR, TAG, "Request doesn't contain RequestURI/Proxy URI");
         goto exit;
     }
 
@@ -2657,7 +2966,6 @@ OCStackResult OCDoResource(OCDoHandle *handle,
     case OC_REST_GET:
     case OC_REST_OBSERVE:
     case OC_REST_OBSERVE_ALL:
-    case OC_REST_CANCEL_OBSERVE:
         requestInfo.method = CA_GET;
         break;
     case OC_REST_PUT:
@@ -2670,7 +2978,6 @@ OCStackResult OCDoResource(OCDoHandle *handle,
         requestInfo.method = CA_DELETE;
         break;
     case OC_REST_DISCOVER:
-        qos = OC_LOW_QOS;
 #ifdef WITH_PRESENCE
     case OC_REST_PRESENCE:
 #endif
@@ -2684,6 +2991,7 @@ OCStackResult OCDoResource(OCDoHandle *handle,
             tmpDevAddr.flags = flags;
             destination = &tmpDevAddr;
             requestInfo.isMulticast = true;
+            qos = OC_LOW_QOS;
         }
         // OC_REST_DISCOVER: CA_DISCOVER will become GET and isMulticast.
         // OC_REST_PRESENCE: Since "presence" is a stack layer only implementation.
@@ -2711,9 +3019,20 @@ OCStackResult OCDoResource(OCDoHandle *handle,
             result = OC_STACK_NO_MEMORY;
             goto exit;
         }
+        OIC_LOG(DEBUG, TAG, "devAddr is set as destination");
         *devAddr = *destination;
     }
 
+    if (devAddr)
+    {
+        OIC_LOG_V(INFO_PRIVATE, TAG, "remoteId of devAddr : %s", devAddr->remoteId);
+        if (!requestInfo.isMulticast)
+        {
+            OIC_LOG_V(DEBUG, TAG, "remoteAddr of devAddr : [%s]:[%d]",
+                      devAddr->addr, devAddr->port);
+        }
+    }
+
     resHandle = GenerateInvocationHandle();
     if (!resHandle)
     {
@@ -2733,7 +3052,6 @@ OCStackResult OCDoResource(OCDoHandle *handle,
     requestInfo.info.type = qualityOfServiceToMessageType(qos);
     requestInfo.info.token = token;
     requestInfo.info.tokenLength = tokenLength;
-    requestInfo.info.resourceUri = resourceUri;
 
     if ((method == OC_REST_OBSERVE) || (method == OC_REST_OBSERVE_ALL))
     {
@@ -2779,7 +3097,7 @@ OCStackResult OCDoResource(OCDoHandle *handle,
     if (method == OC_REST_PRESENCE)
     {
         char *presenceUri = NULL;
-        result = OCPreparePresence(&endpoint, resourceUri, &presenceUri,
+        result = OCPreparePresence(&endpoint, &presenceUri,
                                    requestInfo.isMulticast);
         if (OC_STACK_OK != result)
         {
@@ -2789,10 +3107,17 @@ OCStackResult OCDoResource(OCDoHandle *handle,
         // Assign full presence uri as coap://ip:port/oic/ad to add to callback list.
         // Presence notification will form a canonical uri to
         // look for callbacks into the application.
+        if (resourceUri)
+        {
+            OICFree(resourceUri);
+        }
         resourceUri = presenceUri;
     }
 #endif
 
+    // update resourceUri onto requestInfo after check presence uri
+    requestInfo.info.resourceUri = resourceUri;
+
     ttl = GetTicks(MAX_CB_TIMEOUT_SECONDS * MILLISECONDS_PER_SECOND);
     result = AddClientCB(&clientCB, cbData, token, tokenLength, &resHandle,
                             method, devAddr, resourceUri, resourceType, ttl);
@@ -2801,10 +3126,25 @@ OCStackResult OCDoResource(OCDoHandle *handle,
         goto exit;
     }
 
+    token = NULL;         // Client CB list entry now owns it
     devAddr = NULL;       // Client CB list entry now owns it
     resourceUri = NULL;   // Client CB list entry now owns it
     resourceType = NULL;  // Client CB list entry now owns it
 
+#ifdef WITH_PRESENCE
+    if (method == OC_REST_PRESENCE)
+    {
+        OIC_LOG(ERROR, TAG, "AddClientCB for presence done.");
+
+        if (handle)
+        {
+            *handle = resHandle;
+        }
+
+        goto exit;
+    }
+#endif
+
     // send request
     result = OCSendRequest(&endpoint, &requestInfo);
     if (OC_STACK_OK != result)
@@ -2830,13 +3170,12 @@ exit:
         OICFree(resHandle);
     }
 
-    // This is the owner of the payload object, so we free it
-    OCPayloadDestroy(payload);
     OICFree(requestInfo.info.payload);
     OICFree(devAddr);
     OICFree(resourceUri);
     OICFree(resourceType);
     OICFree(requestInfo.info.options);
+    OIC_TRACE_END();
     return result;
 }
 
@@ -2930,6 +3269,14 @@ OCStackResult OCCancel(OCDoHandle handle, OCQualityOfService qos, OCHeaderOption
             FindAndDeleteClientCB(clientCB);
             break;
 #endif
+        case OC_REST_GET:
+        case OC_REST_PUT:
+        case OC_REST_POST:
+        case OC_REST_DELETE:
+            OIC_LOG_V(INFO, TAG, "Cancelling request callback for resource %s",
+                                           clientCB->requestUri);
+            FindAndDeleteClientCB(clientCB);
+            break;
 
         default:
             ret = OC_STACK_INVALID_METHOD;
@@ -3020,7 +3367,10 @@ OCStackResult OCProcessPresence()
             OIC_LOG_V(DEBUG, TAG, "moving to TTL level %d",
                                         cbNode->presence->TTLlevel);
 
+            OIC_LOG(INFO, TAG, "Before calling into application address space for presence timeout");
             cbResult = cbNode->callBack(cbNode->context, cbNode->handle, &clientResponse);
+            OIC_LOG(INFO, TAG, "After calling into application address space for presence timeout");
+
             if (cbResult == OC_STACK_DELETE_TRANSACTION)
             {
                 FindAndDeleteClientCB(cbNode);
@@ -3068,6 +3418,11 @@ exit:
 
 OCStackResult OCProcess()
 {
+    if (stackState == OC_STACK_UNINITIALIZED)
+    {
+        OIC_LOG(ERROR, TAG, "OCProcess has failed. ocstack is not initialized");
+        return OC_STACK_ERROR;
+    }
 #ifdef WITH_PRESENCE
     OCProcessPresence();
 #endif
@@ -3078,7 +3433,7 @@ OCStackResult OCProcess()
 #endif
 
 #ifdef TCP_ADAPTER
-    ProcessKeepAlive();
+    OCProcessKeepAlive();
 #endif
     return OC_STACK_OK;
 }
@@ -3086,6 +3441,7 @@ OCStackResult OCProcess()
 #ifdef WITH_PRESENCE
 OCStackResult OCStartPresence(const uint32_t ttl)
 {
+    OIC_LOG(INFO, TAG, "Entering OCStartPresence");
     uint8_t tokenLength = CA_MAX_TOKEN_LEN;
     OCChangeResourceProperty(
             &(((OCResource *)presenceResource.handle)->resourceProperties),
@@ -3105,7 +3461,9 @@ OCStackResult OCStartPresence(const uint32_t ttl)
     {
         presenceResource.presenceTTL = ttl;
     }
+#ifndef __TIZENRT__
     OIC_LOG_V(DEBUG, TAG, "Presence TTL is %" PRIu32 " seconds", presenceResource.presenceTTL);
+#endif
 
     if (OC_PRESENCE_UNINITIALIZED == presenceState)
     {
@@ -3137,6 +3495,7 @@ OCStackResult OCStartPresence(const uint32_t ttl)
 
 OCStackResult OCStopPresence()
 {
+    OIC_LOG(INFO, TAG, "Entering OCStopPresence");
     OCStackResult result = OC_STACK_ERROR;
 
     if(presenceResource.handle)
@@ -3162,60 +3521,11 @@ OCStackResult OCStopPresence()
 
 OCStackResult OCSetDefaultDeviceEntityHandler(OCDeviceEntityHandler entityHandler,
                                             void* callbackParameter)
-{
-    defaultDeviceHandler = entityHandler;
-    defaultDeviceHandlerCallbackParameter = callbackParameter;
-
-    return OC_STACK_OK;
-}
-
-OCStackResult OCSetPlatformInfo(OCPlatformInfo platformInfo)
-{
-    OIC_LOG(INFO, TAG, "Entering OCSetPlatformInfo");
-
-    if(myStackMode ==  OC_SERVER || myStackMode == OC_CLIENT_SERVER || myStackMode == OC_GATEWAY)
-    {
-        if (validatePlatformInfo(platformInfo))
-        {
-            return SavePlatformInfo(platformInfo);
-        }
-        else
-        {
-            return OC_STACK_INVALID_PARAM;
-        }
-    }
-    else
-    {
-        return OC_STACK_ERROR;
-    }
-}
-
-OCStackResult OCSetDeviceInfo(OCDeviceInfo deviceInfo)
-{
-    OIC_LOG(INFO, TAG, "Entering OCSetDeviceInfo");
-
-    if (!deviceInfo.deviceName || deviceInfo.deviceName[0] == '\0')
-    {
-        OIC_LOG(ERROR, TAG, "Null or empty device name.");
-        return OC_STACK_INVALID_PARAM;
-    }
-
-    if (deviceInfo.types)
-    {
-        OCStringLL *type =  deviceInfo.types;
-        OCResource *resource = findResource((OCResource *) deviceResource);
-        if (!resource)
-        {
-            return OC_STACK_INVALID_PARAM;
-        }
+{
+    defaultDeviceHandler = entityHandler;
+    defaultDeviceHandlerCallbackParameter = callbackParameter;
 
-        while (type)
-        {
-            OCBindResourceTypeToResource(deviceResource, type->value);
-            type = type->next;
-        }
-    }
-    return SaveDeviceInfo(deviceInfo);
+    return OC_STACK_OK;
 }
 
 OCStackResult OCCreateResource(OCResourceHandle *handle,
@@ -3489,8 +3799,11 @@ OCStackResult OCUnBindResource(
             {
                 OCChildResource *temp = tempChildResource->next;
                 OICFree(tempChildResource);
-                tempLastChildResource->next = temp;
-                temp = NULL;
+                if (tempLastChildResource)
+                {
+                    tempLastChildResource->next = temp;
+                    temp = NULL;
+                }
             }
 
             OIC_LOG(INFO, TAG, "resource unbound");
@@ -3945,6 +4258,7 @@ void incrementSequenceNumber(OCResource * resPtr)
 OCStackResult SendPresenceNotification(OCResourceType *resourceType,
         OCPresenceTrigger trigger)
 {
+    OIC_LOG(INFO, TAG, "SendPresenceNotification");
     OCResource *resPtr = NULL;
     OCStackResult result = OC_STACK_ERROR;
     OCMethod method = OC_REST_PRESENCE;
@@ -3968,6 +4282,7 @@ OCStackResult SendPresenceNotification(OCResourceType *resourceType,
 
 OCStackResult SendStopNotification()
 {
+    OIC_LOG(INFO, TAG, "SendStopNotification");
     OCResource *resPtr = NULL;
     OCStackResult result = OC_STACK_ERROR;
     OCMethod method = OC_REST_PRESENCE;
@@ -4055,6 +4370,7 @@ OCNotifyListOfObservers (OCResourceHandle handle,
 
 OCStackResult OCDoResponse(OCEntityHandlerResponse *ehResponse)
 {
+    OIC_TRACE_BEGIN(%s:OCDoResponse, TAG);
     OCStackResult result = OC_STACK_ERROR;
     OCServerRequest *serverRequest = NULL;
 
@@ -4066,13 +4382,14 @@ OCStackResult OCDoResponse(OCEntityHandlerResponse *ehResponse)
 
     // Normal response
     // Get pointer to request info
-    serverRequest = GetServerRequestUsingHandle((OCServerRequest *)ehResponse->requestHandle);
+    serverRequest = GetServerRequestUsingHandle(ehResponse->requestHandle);
     if(serverRequest)
     {
         // response handler in ocserverrequest.c. Usually HandleSingleResponse.
         result = serverRequest->ehResponseHandler(ehResponse);
     }
 
+    OIC_TRACE_END();
     return result;
 }
 
@@ -4330,12 +4647,12 @@ OCStackResult deleteResource(OCResource *resource)
                 headResource = temp->next;
             }
             // Deleting tail.
-            else if (temp == tailResource)
+            else if (temp == tailResource && prev)
             {
                 tailResource = prev;
                 tailResource->next = NULL;
             }
-            else
+            else if (prev)
             {
                 prev->next = temp->next;
             }
@@ -4361,36 +4678,97 @@ void deleteResourceElements(OCResource *resource)
         return;
     }
 
-    OICFree(resource->uri);
-    deleteResourceType(resource->rsrcType);
-    deleteResourceInterface(resource->rsrcInterface);
+    if (resource->uri)
+    {
+        OICFree(resource->uri);
+        resource->uri = NULL;
+    }
+    if (resource->rsrcType)
+    {
+        deleteResourceType(resource->rsrcType);
+        resource->rsrcType = NULL;
+    }
+    if (resource->rsrcInterface)
+    {
+        deleteResourceInterface(resource->rsrcInterface);
+        resource->rsrcInterface = NULL;
+    }
+    if (resource->rsrcChildResourcesHead)
+    {
+        unbindChildResources(resource->rsrcChildResourcesHead);
+        resource->rsrcChildResourcesHead = NULL;
+    }
+    if (resource->rsrcAttributes)
+    {
+        OCDeleteResourceAttributes(resource->rsrcAttributes);
+        resource->rsrcAttributes = NULL;
+    }
+    resource = NULL;
 }
 
 void deleteResourceType(OCResourceType *resourceType)
 {
-    OCResourceType *pointer = resourceType;
     OCResourceType *next = NULL;
 
-    while (pointer)
+    for (OCResourceType *pointer = resourceType; pointer; pointer = next)
     {
-        next = pointer->next;
-        OICFree(pointer->resourcetypename);
+        next = pointer->next ? pointer->next : NULL;
+        if (pointer->resourcetypename)
+        {
+            OICFree(pointer->resourcetypename);
+            pointer->resourcetypename = NULL;
+        }
         OICFree(pointer);
-        pointer = next;
     }
 }
 
 void deleteResourceInterface(OCResourceInterface *resourceInterface)
 {
-    OCResourceInterface *pointer = resourceInterface;
     OCResourceInterface *next = NULL;
+    for (OCResourceInterface *pointer = resourceInterface; pointer; pointer = next)
+    {
+        next = pointer->next ? pointer->next : NULL;
+        if (pointer->name)
+        {
+            OICFree(pointer->name);
+            pointer->name = NULL;
+        }
+        OICFree(pointer);
+    }
+}
 
-    while (pointer)
+void unbindChildResources(OCChildResource *head)
+{
+    OCChildResource *next = NULL;
+    for (OCChildResource *current = head; current; current = next)
     {
-        next = pointer->next;
-        OICFree(pointer->name);
+        next = current->next;
+        OICFree(current);
+    }
+}
+
+void OCDeleteResourceAttributes(OCAttribute *rsrcAttributes)
+{
+    OCAttribute *next = NULL;
+    for (OCAttribute *pointer = rsrcAttributes; pointer; pointer = next)
+    {
+        next = pointer->next ? pointer->next : NULL;
+        if (pointer->attrName && 0 == strcmp(OC_RSRVD_DATA_MODEL_VERSION, pointer->attrName))
+        {
+            OCFreeOCStringLL((OCStringLL *)pointer->attrValue);
+            pointer->attrValue = NULL;
+        }
+        else if (pointer->attrValue)
+        {
+            OICFree(pointer->attrValue);
+            pointer->attrValue = NULL;
+        }
+        if (pointer->attrName)
+        {
+            OICFree(pointer->attrName);
+            pointer->attrName = NULL;
+        }
         OICFree(pointer);
-        pointer = next;
     }
 }
 
@@ -4649,47 +5027,28 @@ OCStackResult getQueryFromUri(const char * uri, char** query, char ** uriWithout
         return OC_STACK_NO_MEMORY;
 }
 
-static const OicUuid_t* OCGetServerInstanceID(void)
-{
-    static bool generated = false;
-    static OicUuid_t sid;
-    if (generated)
-    {
-        return &sid;
-    }
-
-    if (OC_STACK_OK != GetDoxmDeviceID(&sid))
-    {
-        OIC_LOG(FATAL, TAG, "Generate UUID for Server Instance failed!");
-        return NULL;
-    }
-    generated = true;
-    return &sid;
-}
-
 const char* OCGetServerInstanceIDString(void)
 {
-    static bool generated = false;
     static char sidStr[UUID_STRING_SIZE];
-
-    if(generated)
+    OicUuid_t sid;
+    if (OC_STACK_OK != GetDoxmDeviceID(&sid))
     {
-        return sidStr;
+        OIC_LOG(FATAL, TAG, "GetDoxmDeviceID failed!");
+        return NULL;
     }
 
-    const OicUuid_t *sid = OCGetServerInstanceID();
-    if(OCConvertUuidToString(sid->id, sidStr) != RAND_UUID_OK)
+    if (OCConvertUuidToString(sid.id, sidStr) != RAND_UUID_OK)
     {
         OIC_LOG(FATAL, TAG, "Generate UUID String for Server Instance failed!");
         return NULL;
     }
 
-    generated = true;
     return sidStr;
 }
 
-CAResult_t OCSelectNetwork()
+CAResult_t OCSelectNetwork(OCTransportAdapter transportType)
 {
+    OIC_LOG_V(DEBUG, TAG, "OCSelectNetwork [%d]", transportType);
     CAResult_t retResult = CA_STATUS_FAILED;
     CAResult_t caResult = CA_STATUS_OK;
 
@@ -4713,11 +5072,19 @@ CAResult_t OCSelectNetwork()
         // If CA status is not initialized, CASelectNetwork() will not be called.
         if (caResult != CA_STATUS_NOT_INITIALIZED)
         {
-           caResult = CASelectNetwork(connTypes[i]);
-           if (caResult == CA_STATUS_OK)
-           {
-               retResult = CA_STATUS_OK;
-           }
+            if ((connTypes[i] & transportType) || (OC_DEFAULT_ADAPTER == transportType))
+            {
+                OIC_LOG_V(DEBUG, TAG, "call CASelectNetwork [%d]", connTypes[i]);
+                caResult = CASelectNetwork(connTypes[i]);
+                if (caResult == CA_STATUS_OK)
+                {
+                    retResult = CA_STATUS_OK;
+                }
+            }
+            else
+            {
+                OIC_LOG_V(DEBUG, TAG, "there is no transport type [%d]", connTypes[i]);
+            }
         }
     }
 
@@ -4782,8 +5149,15 @@ bool OCResultToSuccess(OCStackResult ocResult)
     }
 }
 
+#ifdef WITH_CHPROXY
+OCStackResult OCSetProxyURI(const char *uri)
+{
+    return CAResultToOCResult(CASetProxyUri(uri));
+}
+#endif
+
 #if defined(RD_CLIENT) || defined(RD_SERVER)
-OCStackResult OCBindResourceInsToResource(OCResourceHandle handle, uint8_t ins)
+OCStackResult OCBindResourceInsToResource(OCResourceHandle handle, int64_t ins)
 {
     VERIFY_NON_NULL(handle, ERROR, OC_STACK_INVALID_PARAM);
 
@@ -4801,6 +5175,128 @@ OCStackResult OCBindResourceInsToResource(OCResourceHandle handle, uint8_t ins)
     return OC_STACK_OK;
 }
 
+
+OCStackResult OCUpdateResourceInsWithResponse(const char *requestUri,
+                                              const OCClientResponse *response)
+{
+    // Validate input parameters
+    VERIFY_NON_NULL(requestUri, ERROR, OC_STACK_INVALID_PARAM);
+    VERIFY_NON_NULL(response, ERROR, OC_STACK_INVALID_PARAM);
+
+    char *targetUri = (char *) OICMalloc(strlen(requestUri) + 1);
+    if (!targetUri)
+    {
+        return OC_STACK_NO_MEMORY;
+    }
+    strncpy(targetUri, requestUri, strlen(requestUri) + 1);
+
+    if (response->result == OC_STACK_RESOURCE_CHANGED) // publish message
+    {
+        OIC_LOG(DEBUG, TAG, "update the ins of published resource");
+
+        char rdPubUri[MAX_URI_LENGTH] = { 0 };
+        snprintf(rdPubUri, MAX_URI_LENGTH, "%s?rt=%s", OC_RSRVD_RD_URI,
+                 OC_RSRVD_RESOURCE_TYPE_RDPUBLISH);
+
+        if (strcmp(rdPubUri, targetUri) == 0)
+        {
+            // Update resource unique id in stack.
+            if (response)
+            {
+                if (response->payload)
+                {
+                    OCRepPayload *rdPayload = (OCRepPayload *) response->payload;
+                    OCRepPayload **links = NULL;
+                    size_t dimensions[MAX_REP_ARRAY_DEPTH] = { 0 };
+                    if (OCRepPayloadGetPropObjectArray(rdPayload, OC_RSRVD_LINKS,
+                                                       &links, dimensions))
+                    {
+                        size_t i = 0;
+                        for (; i < dimensions[0]; i++)
+                        {
+                            char *uri = NULL;
+                            if (OCRepPayloadGetPropString(links[i], OC_RSRVD_HREF, &uri))
+                            {
+                                OCResourceHandle handle = OCGetResourceHandleAtUri(uri);
+                                int64_t ins = 0;
+                                if (OCRepPayloadGetPropInt(links[i], OC_RSRVD_INS, &ins))
+                                {
+                                    OCBindResourceInsToResource(handle, ins);
+                                }
+
+                                OICFree(uri);
+                                uri = NULL;
+                            }
+                        }
+
+                        // Free links
+                        size_t count = calcDimTotal(dimensions);
+                        for (size_t k = 0; k < count; k++)
+                        {
+                            OCRepPayloadDestroy(links[k]);
+                        }
+                        OICFree(links);
+                    }
+                }
+            }
+        }
+    }
+    else if (response->result == OC_STACK_RESOURCE_DELETED) // delete message
+    {
+        OIC_LOG(DEBUG, TAG, "update the ins of deleted resource with 0");
+
+        uint8_t numResources = 0;
+        OCGetNumberOfResources(&numResources);
+
+        char *ins = strstr(targetUri, OC_RSRVD_INS);
+        if (!ins)
+        {
+            for (uint8_t i = 0; i < numResources; i++)
+            {
+                OCResourceHandle resHandle = OCGetResourceHandle(i);
+                if (resHandle)
+                {
+                    OCBindResourceInsToResource(resHandle, 0);
+                }
+            }
+        }
+        else
+        {
+            const char *token = "&";
+            char *iterTokenPtr = NULL;
+            char *start = strtok_r(targetUri, token, &iterTokenPtr);
+
+             while (start != NULL)
+             {
+                 char *query = start;
+                 query = strstr(query, OC_RSRVD_INS);
+                 if (query)
+                 {
+                     int64_t queryIns = atoi(query + 4);
+                     for (uint8_t i = 0; i < numResources; i++)
+                     {
+                         OCResourceHandle resHandle = OCGetResourceHandle(i);
+                         if (resHandle)
+                         {
+                             int64_t resIns = 0;
+                             OCGetResourceIns(resHandle, &resIns);
+                             if (queryIns && queryIns == resIns)
+                             {
+                                 OCBindResourceInsToResource(resHandle, 0);
+                                 break;
+                             }
+                         }
+                     }
+                 }
+                 start = strtok_r(NULL, token, &iterTokenPtr);
+             }
+        }
+    }
+
+    OICFree(targetUri);
+    return OC_STACK_OK;
+}
+
 OCResourceHandle OCGetResourceHandleAtUri(const char *uri)
 {
     if (!uri)
@@ -4823,7 +5319,7 @@ OCResourceHandle OCGetResourceHandleAtUri(const char *uri)
     return NULL;
 }
 
-OCStackResult OCGetResourceIns(OCResourceHandle handle, uint8_t *ins)
+OCStackResult OCGetResourceIns(OCResourceHandle handle, int64_t *ins)
 {
     OCResource *resource = NULL;
 
@@ -4839,3 +5335,281 @@ OCStackResult OCGetResourceIns(OCResourceHandle handle, uint8_t *ins)
     return OC_STACK_ERROR;
 }
 #endif
+
+OCStackResult OCSetHeaderOption(OCHeaderOption* ocHdrOpt, size_t* numOptions, uint16_t optionID,
+                                const void* optionData, size_t optionDataLength)
+{
+    if (!ocHdrOpt)
+    {
+        OIC_LOG (INFO, TAG, "Header options are NULL");
+        return OC_STACK_INVALID_PARAM;
+    }
+
+    if (!optionData)
+    {
+        OIC_LOG (INFO, TAG, "optionData are NULL");
+        return OC_STACK_INVALID_PARAM;
+    }
+
+    if (!numOptions)
+    {
+        OIC_LOG (INFO, TAG, "numOptions is NULL");
+        return OC_STACK_INVALID_PARAM;
+    }
+
+    if (*numOptions >= MAX_HEADER_OPTIONS)
+    {
+        OIC_LOG (INFO, TAG, "Exceeding MAX_HEADER_OPTIONS");
+        return OC_STACK_NO_MEMORY;
+    }
+
+    ocHdrOpt += *numOptions;
+    ocHdrOpt->protocolID = OC_COAP_ID;
+    ocHdrOpt->optionID = optionID;
+    ocHdrOpt->optionLength =
+            optionDataLength < MAX_HEADER_OPTION_DATA_LENGTH ?
+                    optionDataLength : MAX_HEADER_OPTION_DATA_LENGTH;
+    memcpy(ocHdrOpt->optionData, (const void*) optionData, ocHdrOpt->optionLength);
+    *numOptions += 1;
+
+    return OC_STACK_OK;
+}
+
+OCStackResult OCGetHeaderOption(OCHeaderOption* ocHdrOpt, size_t numOptions, uint16_t optionID,
+                                void* optionData, size_t optionDataLength, uint16_t* receivedDataLength)
+{
+    if (!ocHdrOpt || !numOptions)
+    {
+        OIC_LOG (INFO, TAG, "No options present");
+        return OC_STACK_OK;
+    }
+
+    if (!optionData)
+    {
+        OIC_LOG (INFO, TAG, "optionData are NULL");
+        return OC_STACK_INVALID_PARAM;
+    }
+
+    if (!receivedDataLength)
+    {
+        OIC_LOG (INFO, TAG, "receivedDataLength is NULL");
+        return OC_STACK_INVALID_PARAM;
+    }
+
+    for (uint8_t i = 0; i < numOptions; i++)
+    {
+        if (ocHdrOpt[i].optionID == optionID)
+        {
+            if (optionDataLength >= ocHdrOpt->optionLength)
+            {
+                memcpy(optionData, ocHdrOpt->optionData, ocHdrOpt->optionLength);
+                *receivedDataLength = ocHdrOpt->optionLength;
+                return OC_STACK_OK;
+            }
+            else
+            {
+                OIC_LOG (ERROR, TAG, "optionDataLength is less than the length of received data");
+                return OC_STACK_ERROR;
+            }
+        }
+    }
+    return OC_STACK_OK;
+}
+
+void OCDefaultAdapterStateChangedHandler(CATransportAdapter_t adapter, bool enabled)
+{
+    OIC_LOG(DEBUG, TAG, "OCDefaultAdapterStateChangedHandler");
+    if (g_adapterHandler)
+    {
+        g_adapterHandler(adapter, enabled);
+    }
+}
+
+void OCDefaultConnectionStateChangedHandler(const CAEndpoint_t *info, bool isConnected)
+{
+    OIC_LOG(DEBUG, TAG, "OCDefaultConnectionStateChangedHandler");
+    if (g_connectionHandler)
+    {
+       g_connectionHandler(info, isConnected);
+    }
+
+    /*
+     * If the client observes one or more resources over a reliable connection,
+     * then the CoAP server (or intermediary in the role of the CoAP server)
+     * MUST remove all entries associated with the client endpoint from the lists
+     * of observers when the connection is either closed or times out.
+     */
+    if (!isConnected)
+    {
+        OCDevAddr devAddr = { OC_DEFAULT_ADAPTER };
+        CopyEndpointToDevAddr(info, &devAddr);
+
+        // remove observer list with remote device address.
+        DeleteObserverUsingDevAddr(&devAddr);
+    }
+}
+
+OCStackResult OCGetDeviceId(OCUUIdentity *deviceId)
+{
+    OicUuid_t oicUuid;
+    OCStackResult ret = OC_STACK_ERROR;
+
+    ret = GetDoxmDeviceID(&oicUuid);
+    if (OC_STACK_OK == ret)
+    {
+        memcpy(deviceId, &oicUuid, UUID_IDENTITY_SIZE);
+    }
+    else
+    {
+        OIC_LOG(ERROR, TAG, "Device ID Get error");
+    }
+    return ret;
+}
+
+OCStackResult OCSetDeviceId(const OCUUIdentity *deviceId)
+{
+    OicUuid_t oicUuid;
+    OCStackResult ret = OC_STACK_ERROR;
+
+    memcpy(&oicUuid, deviceId, UUID_LENGTH);
+    for (int i = 0; i < UUID_LENGTH; i++)
+    {
+        OIC_LOG_V(INFO, TAG, "Set Device Id %x", oicUuid.id[i]);
+    }
+    ret = SetDoxmDeviceID(&oicUuid);
+    return ret;
+}
+
+OCStackResult OCGetDeviceOwnedState(bool *isOwned)
+{
+    bool isDeviceOwned = true;
+    OCStackResult ret = OC_STACK_ERROR;
+
+    ret = GetDoxmIsOwned(&isDeviceOwned);
+    if (OC_STACK_OK == ret)
+    {
+        *isOwned = isDeviceOwned;
+    }
+    else
+    {
+        OIC_LOG(ERROR, TAG, "Device Owned State Get error");
+    }
+    return ret;
+}
+
+void OCClearCallBackList()
+{
+    DeleteClientCBList();
+}
+
+void OCClearObserverlist()
+{
+    DeleteObserverList();
+}
+
+int OCEncrypt(const unsigned char *pt, size_t pt_len,
+        unsigned char **ct, size_t *ct_len)
+{
+#ifndef __SECURE_PSI__
+    OIC_LOG_V(DEBUG, TAG, "Not Supported : %s", __func__);
+    return 0;
+#else
+    OIC_LOG_V(DEBUG, TAG, "%s", __func__);
+
+    return psiEncrypt(pt, pt_len, ct, ct_len);
+#endif // __SECURE_PSI__
+}
+
+int OCDecrypt(const unsigned char *ct, size_t ct_len,
+        unsigned char **pt, size_t *pt_len)
+{
+#ifndef __SECURE_PSI__
+    OIC_LOG_V(DEBUG, TAG, "Not Supported : %s", __func__);
+    return 0;
+#else
+    OIC_LOG_V(DEBUG, TAG, "%s", __func__);
+
+    return psiDecrypt(ct, ct_len, pt, pt_len);
+#endif // __SECURE_PSI__
+}
+
+OCStackResult OCSetKey(const unsigned char* key)
+{
+#ifndef __SECURE_PSI__
+    OIC_LOG_V(DEBUG, TAG, "Not Supported : %s", __func__);
+    return OC_STACK_OK;
+#else
+    OIC_LOG_V(DEBUG, TAG, "%s", __func__);
+
+    return psiSetKey(key);
+#endif // __SECURE_PSI__
+}
+
+OCStackResult OCGetKey(unsigned char* key)
+{
+#ifndef __SECURE_PSI__
+    OIC_LOG_V(DEBUG, TAG, "Not Supported : %s", __func__);
+    return OC_STACK_OK;
+#else
+    OIC_LOG_V(DEBUG, TAG, "%s", __func__);
+
+    return psiGetKey(key);
+#endif // __SECURE_PSI__
+}
+
+OCStackResult OCSetSecurePSI(const unsigned char *key, const OCPersistentStorage *psPlain,
+        const OCPersistentStorage *psEnc, const OCPersistentStorage *psRescue)
+{
+#ifndef __SECURE_PSI__
+    OIC_LOG_V(DEBUG, TAG, "Not Supported : %s", __func__);
+    return OC_STACK_OK;
+#else
+    OIC_LOG_V(DEBUG, TAG, "%s", __func__);
+
+    return setSecurePSI(key, psPlain, psEnc, psRescue);
+#endif // __SECURE_PSI__
+}
+
+#if defined(__WITH_DTLS__) || defined (__WITH_TLS__)
+static void OtmEventHandler(const char *addr, uint16_t port, const char *uuid, int event)
+{
+    if (g_otmEventHandler.cb)
+    {
+        g_otmEventHandler.cb(g_otmEventHandler.ctx, addr, port, uuid, event);
+    }
+}
+
+/* TODO Work-around
+ * It is already declared in srmutility.h.
+ * We can't include the header file, because of "redefined VERIFY_NON_NULL"
+ */
+typedef void (*OicSecOtmEventHandler_t)(const char* addr, uint16_t port,
+        const char* uuid, int event);
+void SetOtmEventHandler(OicSecOtmEventHandler_t otmEventHandler);
+#endif
+
+OCStackResult OCSetOtmEventHandler(void *ctx, OCOtmEventHandler cb)
+{
+#if defined(__WITH_DTLS__) || defined (__WITH_TLS__)
+    OIC_LOG_V(DEBUG, TAG, "%s", __func__);
+
+    g_otmEventHandler.cb = cb;
+    g_otmEventHandler.ctx = ctx;
+
+    if (g_otmEventHandler.cb)
+    {
+        OIC_LOG(DEBUG, TAG, "SET OCOtmEventHandler");
+        SetOtmEventHandler(OtmEventHandler);
+    }
+    else
+    {
+        OIC_LOG(DEBUG, TAG, "UNSET OCOtmEventHandler");
+        SetOtmEventHandler(NULL);
+    }
+#else
+    OIC_LOG_V(DEBUG, TAG, "Not Supported : %s", __func__);
+    OC_UNUSED(ctx);
+    OC_UNUSED(cb);
+#endif
+    return OC_STACK_OK;
+}