Clean up encodeAddressForRFC6874 routine
[platform/upstream/iotivity.git] / resource / csdk / stack / src / ocstack.c
index eb3ed08..b62199f 100644 (file)
 #include "logger.h"
 #include "ocserverrequest.h"
 #include "secureresourcemanager.h"
+#include "psinterface.h"
 #include "doxmresource.h"
 #include "cacommon.h"
 #include "cainterface.h"
 #include "ocpayload.h"
 #include "ocpayloadcbor.h"
+#include "platform_features.h"
 
 #if defined (ROUTING_GATEWAY) || defined (ROUTING_EP)
 #include "routingutility.h"
@@ -117,9 +119,13 @@ OCResource *headResource = NULL;
 static OCResource *tailResource = NULL;
 static OCResourceHandle platformResource = {0};
 static OCResourceHandle deviceResource = {0};
+#ifdef MQ_BROKER
+static OCResourceHandle brokerResource = {0};
+#endif
+
 #ifdef WITH_PRESENCE
 static OCPresenceState presenceState = OC_PRESENCE_UNINITIALIZED;
-static PresenceResource presenceResource;
+static PresenceResource presenceResource = {0};
 static uint8_t PresenceTimeOutSize = 0;
 static uint32_t PresenceTimeOut[] = {50, 75, 85, 95, 100};
 #endif
@@ -134,10 +140,6 @@ void* defaultDeviceHandlerCallbackParameter = NULL;
 static const char COAP_TCP[] = "coap+tcp:";
 static const char CORESPEC[] = "core";
 
-//#ifdef DIRECT_PAIRING
-OCDirectPairingCB gDirectpairingCallback = NULL;
-//#endif
-
 //-----------------------------------------------------------------------------
 // Macros
 //-----------------------------------------------------------------------------
@@ -444,7 +446,11 @@ void CopyEndpointToDevAddr(const CAEndpoint_t *in, OCDevAddr *out)
     out->port = in->port;
     out->ifindex = in->ifindex;
 #if defined (ROUTING_GATEWAY) || defined (ROUTING_EP)
-    memcpy(out->routeData, in->routeData, sizeof(out->routeData));
+    /* This assert is to prevent accidental mismatch between address size macros defined in
+     * RI and CA and cause crash here. */
+    OC_STATIC_ASSERT(MAX_ADDR_STR_SIZE_CA == MAX_ADDR_STR_SIZE,
+                                        "Address size mismatch between RI and CA");
+    memcpy(out->routeData, in->routeData, sizeof(in->routeData));
 #endif
 }
 
@@ -457,7 +463,11 @@ void CopyDevAddrToEndpoint(const OCDevAddr *in, CAEndpoint_t *out)
     out->flags = OCToCATransportFlags(in->flags);
     OICStrcpy(out->addr, sizeof(out->addr), in->addr);
 #if defined (ROUTING_GATEWAY) || defined (ROUTING_EP)
-    memcpy(out->routeData, in->routeData, sizeof(out->routeData));
+    /* This assert is to prevent accidental mismatch between address size macros defined in
+     * RI and CA and cause crash here. */
+    OC_STATIC_ASSERT(MAX_ADDR_STR_SIZE_CA == MAX_ADDR_STR_SIZE,
+                                        "Address size mismatch between RI and CA");
+    memcpy(out->routeData, in->routeData, sizeof(in->routeData));
 #endif
     out->port = in->port;
     out->ifindex = in->ifindex;
@@ -523,7 +533,8 @@ OCStackResult OCStackFeedBack(CAToken_t token, uint8_t tokenLength, uint8_t stat
                                                 NULL, PAYLOAD_TYPE_REPRESENTATION,
                                                 NULL, 0, 0, NULL,
                                                 OC_OBSERVE_DEREGISTER,
-                                                observer->observeId);
+                                                observer->observeId,
+                                                0);
             if(result != OC_STACK_OK)
             {
                 return result;
@@ -574,7 +585,8 @@ OCStackResult OCStackFeedBack(CAToken_t token, uint8_t tokenLength, uint8_t stat
                                                     NULL, PAYLOAD_TYPE_REPRESENTATION,
                                                     NULL, 0, 0, NULL,
                                                     OC_OBSERVE_DEREGISTER,
-                                                    observer->observeId);
+                                                    observer->observeId,
+                                                    0);
                 if(result != OC_STACK_OK)
                 {
                     return OC_STACK_ERROR;
@@ -635,7 +647,6 @@ static OCStackResult CAResultToOCStackResult(CAResult_t caResult)
 OCStackResult CAResponseToOCStackResult(CAResponseResult_t caCode)
 {
     OCStackResult ret = OC_STACK_ERROR;
-
     switch(caCode)
     {
         case CA_CREATED:
@@ -645,6 +656,8 @@ OCStackResult CAResponseToOCStackResult(CAResponseResult_t caCode)
             ret = OC_STACK_RESOURCE_DELETED;
             break;
         case CA_CHANGED:
+            ret = OC_STACK_RESOURCE_CHANGED;
+            break;
         case CA_CONTENT:
         case CA_VALID:
             ret = OC_STACK_OK;
@@ -697,7 +710,8 @@ CAResponseResult_t OCToCAStackResult(OCStackResult ocCode, OCMethod method)
                    // This should not happen but,
                    // give it a value just in case but output an error
                    ret = CA_CONTENT;
-                   OIC_LOG_V(ERROR, TAG, "Unexpected OC_STACK_OK return code for method [%d].", method);
+                   OIC_LOG_V(ERROR, TAG, "Unexpected OC_STACK_OK return code for method [%d].",
+                            method);
             }
             break;
         case OC_STACK_RESOURCE_CREATED:
@@ -706,6 +720,9 @@ CAResponseResult_t OCToCAStackResult(OCStackResult ocCode, OCMethod method)
         case OC_STACK_RESOURCE_DELETED:
             ret = CA_DELETED;
             break;
+        case OC_STACK_RESOURCE_CHANGED:
+            ret = CA_CHANGED;
+            break;
         case OC_STACK_INVALID_QUERY:
             ret = CA_BAD_REQ;
             break;
@@ -839,6 +856,88 @@ OCPresenceTrigger convertTriggerStringToEnum(const char * triggerStr)
 }
 
 /**
+ * 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)
+{
+    VERIFY_NON_NULL(inputAddress,  FATAL, OC_STACK_INVALID_PARAM);
+    VERIFY_NON_NULL(outputAddress, FATAL, OC_STACK_INVALID_PARAM);
+
+    size_t inputLength = strnlen(inputAddress, outputSize);
+
+    // inputSize includes the null terminator
+    size_t inputSize = inputLength + 1;
+
+    if (inputSize > outputSize)
+    {
+        OIC_LOG_V(ERROR, TAG,
+                  "encodeAddressForRFC6874 failed: "
+                  "outputSize (%d) < inputSize (%d)",
+                  outputSize, inputSize);
+
+        return OC_STACK_ERROR;
+    }
+
+    char* percentChar = strchr(inputAddress, '%');
+
+    // If there is no '%' character, then no change is required to the string.
+    if (NULL == percentChar)
+    {
+        OICStrcpy(outputAddress, outputSize, inputAddress);
+        return OC_STACK_OK;
+    }
+
+    const char* addressPart = &inputAddress[0];
+    const char* scopeIdPart = percentChar + 1;
+
+    // Sanity check to make sure this string doesn't have more '%' characters
+    if (NULL != strchr(scopeIdPart, '%'))
+    {
+        return OC_STACK_ERROR;
+    }
+
+    // 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!");
+        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");
+        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!");
+        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);
+
+    return OC_STACK_OK;
+}
+
+/**
  * The cononical presence allows constructed URIs to be string compared.
  *
  * requestUri must be a char array of size CA_MAX_URI_LENGTH
@@ -862,8 +961,19 @@ static int FormCanonicalPresenceUri(const CAEndpoint_t *endpoint, char *resource
             }
             else
             {
+                char addressEncoded[CA_MAX_URI_LENGTH] = {0};
+
+                OCStackResult result = encodeAddressForRFC6874(addressEncoded,
+                                                               sizeof(addressEncoded),
+                                                               ep->addr);
+
+                if (OC_STACK_OK != result)
+                {
+                    return -1;
+                }
+
                 return snprintf(presenceUri, CA_MAX_URI_LENGTH, "coap://[%s]:%u%s",
-                        ep->addr, ep->port, OC_RSRVD_PRESENCE_URI);
+                        addressEncoded, ep->port, OC_RSRVD_PRESENCE_URI);
             }
         }
         else
@@ -1154,7 +1264,7 @@ void OCHandleResponse(const CAEndpoint_t* endPoint, const CAResponseInfo_t* resp
 
             OCClientResponse response =
                 {.devAddr = {.adapter = OC_DEFAULT_ADAPTER}};
-            response.sequenceNumber = OC_OBSERVE_NO_OPTION;
+            response.sequenceNumber = MAX_SEQUENCE_NUMBER + 1;
             CopyEndpointToDevAddr(endPoint, &response.devAddr);
             FixUpClientResponse(&response);
             response.resourceUri = responseInfo->info.resourceUri;
@@ -1180,6 +1290,12 @@ void OCHandleResponse(const CAEndpoint_t* endPoint, const CAResponseInfo_t* resp
                     {
                         type = PAYLOAD_TYPE_DISCOVERY;
                     }
+#ifdef WITH_MQ
+                    else if (strcmp(cbNode->requestUri, OC_RSRVD_WELL_KNOWN_MQ_URI) == 0)
+                    {
+                        type = PAYLOAD_TYPE_DISCOVERY;
+                    }
+#endif
                     else if (strcmp(cbNode->requestUri, OC_RSRVD_DEVICE_URI) == 0)
                     {
                         type = PAYLOAD_TYPE_DEVICE;
@@ -1276,7 +1392,6 @@ void OCHandleResponse(const CAEndpoint_t* endPoint, const CAResponseInfo_t* resp
                             (observationOption << 8) | optionData[i];
                     }
                     response.sequenceNumber = observationOption;
-
                     response.numRcvdVendorSpecificHeaderOptions = responseInfo->info.numOptions - 1;
                     start = 1;
                 }
@@ -1301,6 +1416,7 @@ void OCHandleResponse(const CAEndpoint_t* endPoint, const CAResponseInfo_t* resp
 
             if (cbNode->method == OC_REST_OBSERVE &&
                 response.sequenceNumber > OC_OFFSET_SEQUENCE_NUMBER &&
+                cbNode->sequenceNumber <=  MAX_SEQUENCE_NUMBER &&
                 response.sequenceNumber <= cbNode->sequenceNumber)
             {
                 OIC_LOG_V(INFO, TAG, "Received stale notification. Number :%d",
@@ -1329,7 +1445,7 @@ void OCHandleResponse(const CAEndpoint_t* endPoint, const CAResponseInfo_t* resp
             if(responseInfo->info.type == CA_MSG_CONFIRM)
             {
                 SendDirectStackResponse(endPoint, responseInfo->info.messageId, CA_EMPTY,
-                        CA_MSG_ACKNOWLEDGE, 0, NULL, NULL, 0, NULL);
+                        CA_MSG_ACKNOWLEDGE, 0, NULL, NULL, 0, NULL, CA_RESPONSE_FOR_RES);
             }
 
             OCPayloadDestroy(response.payload);
@@ -1379,7 +1495,7 @@ void OCHandleResponse(const CAEndpoint_t* endPoint, const CAResponseInfo_t* resp
             {
                 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_MSG_RESET, 0, NULL, NULL, 0, NULL, CA_RESPONSE_FOR_RES);
             }
         }
 
@@ -1493,7 +1609,8 @@ void HandleCAErrorResponse(const CAEndpoint_t *endPoint, const CAErrorInfo_t *er
 OCStackResult SendDirectStackResponse(const CAEndpoint_t* endPoint, const uint16_t coapID,
         const CAResponseResult_t responseResult, const CAMessageType_t type,
         const uint8_t numOptions, const CAHeaderOption_t *options,
-        CAToken_t token, uint8_t tokenLength, const char *resourceUri)
+        CAToken_t token, uint8_t tokenLength, const char *resourceUri,
+        CADataType_t dataType)
 {
     OIC_LOG(DEBUG, TAG, "Entering SendDirectStackResponse");
     CAResponseInfo_t respInfo = {
@@ -1517,6 +1634,7 @@ OCStackResult SendDirectStackResponse(const CAEndpoint_t* endPoint, const uint16
     respInfo.info.type = type;
     respInfo.info.resourceUri = OICStrdup (resourceUri);
     respInfo.info.acceptFormat = CA_FORMAT_UNDEFINED;
+    respInfo.info.dataType = dataType;
 
 #if defined (ROUTING_GATEWAY) || defined (ROUTING_EP)
     // Add the destination to route option from the endpoint->routeData.
@@ -1752,7 +1870,8 @@ void OCHandleRequests(const CAEndpoint_t* endPoint, const CARequestInfo_t* reque
             SendDirectStackResponse(endPoint, requestInfo->info.messageId, CA_BAD_REQ,
                         requestInfo->info.type, requestInfo->info.numOptions,
                         requestInfo->info.options, requestInfo->info.token,
-                        requestInfo->info.tokenLength, requestInfo->info.resourceUri);
+                        requestInfo->info.tokenLength, requestInfo->info.resourceUri,
+                        CA_RESPONSE_DATA);
             OICFree(serverRequest.payload);
             return;
     }
@@ -1771,7 +1890,8 @@ void OCHandleRequests(const CAEndpoint_t* endPoint, const CARequestInfo_t* reque
             SendDirectStackResponse(endPoint, requestInfo->info.messageId, CA_INTERNAL_SERVER_ERROR,
                     requestInfo->info.type, requestInfo->info.numOptions,
                     requestInfo->info.options, requestInfo->info.token,
-                    requestInfo->info.tokenLength, requestInfo->info.resourceUri);
+                    requestInfo->info.tokenLength, requestInfo->info.resourceUri,
+                    CA_RESPONSE_DATA);
             OICFree(serverRequest.payload);
             return;
         }
@@ -1822,7 +1942,8 @@ void OCHandleRequests(const CAEndpoint_t* endPoint, const CARequestInfo_t* reque
         SendDirectStackResponse(endPoint, requestInfo->info.messageId, CA_BAD_OPT,
                 requestInfo->info.type, requestInfo->info.numOptions,
                 requestInfo->info.options, requestInfo->info.token,
-                requestInfo->info.tokenLength, requestInfo->info.resourceUri);
+                requestInfo->info.tokenLength, requestInfo->info.resourceUri,
+                CA_RESPONSE_DATA);
         OICFree(serverRequest.payload);
         OICFree(serverRequest.requestToken);
         return;
@@ -1842,10 +1963,11 @@ void OCHandleRequests(const CAEndpoint_t* endPoint, const CARequestInfo_t* reque
         if (requestInfo->info.type == CA_MSG_CONFIRM)
         {
             SendDirectStackResponse(endPoint, requestInfo->info.messageId, CA_EMPTY,
-                                    CA_MSG_ACKNOWLEDGE,0, NULL, NULL, 0, NULL);
+                                    CA_MSG_ACKNOWLEDGE,0, NULL, NULL, 0, NULL,
+                                    CA_RESPONSE_DATA);
         }
     }
-    else if(requestResult != OC_STACK_OK)
+    else if(!OCResultToSuccess(requestResult))
     {
         OIC_LOG_V(ERROR, TAG, "HandleStackRequests failed. error: %d", requestResult);
 
@@ -1855,7 +1977,8 @@ void OCHandleRequests(const CAEndpoint_t* endPoint, const CARequestInfo_t* reque
         SendDirectStackResponse(endPoint, requestInfo->info.messageId, stackResponse,
                 requestInfo->info.type, requestInfo->info.numOptions,
                 requestInfo->info.options, requestInfo->info.token,
-                requestInfo->info.tokenLength, requestInfo->info.resourceUri);
+                requestInfo->info.tokenLength, requestInfo->info.resourceUri,
+                CA_RESPONSE_DATA);
     }
     // requestToken is fed to HandleStackRequests, which then goes to AddServerRequest.
     // The token is copied in there, and is thus still owned by this function.
@@ -2645,12 +2768,6 @@ OCStackResult OCDoResource(OCDoHandle *handle,
         requestInfo.info.payloadFormat = CA_FORMAT_UNDEFINED;
     }
 
-    if (result != OC_STACK_OK)
-    {
-        OIC_LOG(ERROR, TAG, "CACreateEndpoint error");
-        goto exit;
-    }
-
     // prepare for response
 #ifdef WITH_PRESENCE
     if (method == OC_REST_PRESENCE)
@@ -3084,8 +3201,6 @@ OCStackResult OCSetDeviceInfo(OCDeviceInfo deviceInfo)
         {
             return OC_STACK_INVALID_PARAM;
         }
-        deleteResourceType(resource->rsrcType);
-        resource->rsrcType = NULL;
 
         while (type)
         {
@@ -3126,15 +3241,25 @@ OCStackResult OCCreateResource(OCResourceHandle *handle,
         return OC_STACK_INVALID_PARAM;
     }
 
-    if(!resourceInterfaceName || strlen(resourceInterfaceName) == 0)
+    if (!resourceInterfaceName || strlen(resourceInterfaceName) == 0)
     {
         resourceInterfaceName = OC_RSRVD_INTERFACE_DEFAULT;
     }
 
+#ifdef MQ_PUBLISHER
+    resourceProperties = resourceProperties | OC_MQ_PUBLISHER;
+#endif
     // Make sure resourceProperties bitmask has allowed properties specified
     if (resourceProperties
             > (OC_ACTIVE | OC_DISCOVERABLE | OC_OBSERVABLE | OC_SLOW | OC_SECURE |
-               OC_EXPLICIT_DISCOVERABLE))
+               OC_EXPLICIT_DISCOVERABLE
+#ifdef MQ_PUBLISHER
+               | OC_MQ_PUBLISHER
+#endif
+#ifdef MQ_BROKER
+               | OC_MQ_BROKER
+#endif
+               ))
     {
         OIC_LOG(ERROR, TAG, "Invalid property");
         return OC_STACK_INVALID_PARAM;
@@ -3962,16 +4087,7 @@ const OCDPDev_t* OCGetDirectPairedDevices()
     return (const OCDPDev_t*)DPGetPairedDevices();
 }
 
-void DirectPairingCB (OCDirectPairingDev_t * peer, OCStackResult result)
-{
-    if (gDirectpairingCallback)
-    {
-        gDirectpairingCallback((OCDPDev_t*)peer, result);
-        gDirectpairingCallback = NULL;
-    }
-}
-
-OCStackResult OCDoDirectPairing(OCDPDev_t* peer, OCPrm_t pmSel, char *pinNumber,
+OCStackResult OCDoDirectPairing(void *ctx, OCDPDev_t* peer, OCPrm_t pmSel, char *pinNumber,
                                                      OCDirectPairingCB resultCallback)
 {
     OIC_LOG(INFO, TAG, "Start OCDoDirectPairing");
@@ -3986,9 +4102,8 @@ OCStackResult OCDoDirectPairing(OCDPDev_t* peer, OCPrm_t pmSel, char *pinNumber,
         return OC_STACK_INVALID_CALLBACK;
     }
 
-    gDirectpairingCallback = resultCallback;
-    return DPDirectPairing((OCDirectPairingDev_t*)peer, (OicSecPrm_t)pmSel,
-                                           pinNumber, DirectPairingCB);
+    return DPDirectPairing(ctx, (OCDirectPairingDev_t*)peer, (OicSecPrm_t)pmSel,
+                                           pinNumber, (OCDirectPairingResultCB)resultCallback);
 }
 //#endif // DIRECT_PAIRING
 
@@ -4065,6 +4180,7 @@ OCStackResult initResources()
 
     if(result == OC_STACK_OK)
     {
+        CreateResetProfile();
         result = OCCreateResource(&deviceResource,
                                   OC_RSRVD_RESOURCE_TYPE_DEVICE,
                                   OC_RSRVD_INTERFACE_DEFAULT,
@@ -4146,6 +4262,11 @@ void deleteAllResources()
 #endif // WITH_PRESENCE
         pointer = temp;
     }
+    memset(&platformResource, 0, sizeof(platformResource));
+    memset(&deviceResource, 0, sizeof(deviceResource));
+#ifdef MQ_BROKER
+    memset(&brokerResource, 0, sizeof(brokerResource));
+#endif
 
     SRMDeInitSecureResources();
 
@@ -4153,6 +4274,7 @@ void deleteAllResources()
     // Ensure that the last resource to be deleted is the presence resource. This allows for all
     // presence notification attributed to their deletion to be processed.
     deleteResource((OCResource *) presenceResource.handle);
+    memset(&presenceResource, 0, sizeof(presenceResource));
 #endif // WITH_PRESENCE
 }
 
@@ -4375,7 +4497,8 @@ void insertResourceInterface(OCResource *resource, OCResourceInterface *newInter
         }
         else
         {
-            OCStackResult result = BindResourceInterfaceToResource(resource, OC_RSRVD_INTERFACE_DEFAULT);
+            OCStackResult result = BindResourceInterfaceToResource(resource,
+                                                                    OC_RSRVD_INTERFACE_DEFAULT);
             if (result != OC_STACK_OK)
             {
                 OICFree(newInterface->name);
@@ -4418,7 +4541,11 @@ void insertResourceInterface(OCResource *resource, OCResourceInterface *newInter
             previous = pointer;
             pointer = pointer->next;
         }
-        previous->next = newInterface;
+
+        if (previous)
+        {
+            previous->next = newInterface;
+        }
     }
 }
 
@@ -4630,3 +4757,76 @@ OCStackResult CAResultToOCResult(CAResult_t caResult)
             return OC_STACK_ERROR;
     }
 }
+
+bool OCResultToSuccess(OCStackResult ocResult)
+{
+    switch (ocResult)
+    {
+        case OC_STACK_OK:
+        case OC_STACK_RESOURCE_CREATED:
+        case OC_STACK_RESOURCE_DELETED:
+        case OC_STACK_CONTINUE:
+        case OC_STACK_RESOURCE_CHANGED:
+            return true;
+        default:
+            return false;
+    }
+}
+
+#if defined(RD_CLIENT) || defined(RD_SERVER)
+OCStackResult OCBindResourceInsToResource(OCResourceHandle handle, uint8_t ins)
+{
+    VERIFY_NON_NULL(handle, ERROR, OC_STACK_INVALID_PARAM);
+
+    OCResource *resource = NULL;
+
+    resource = findResource((OCResource *) handle);
+    if (!resource)
+    {
+        OIC_LOG(ERROR, TAG, "Resource not found");
+        return OC_STACK_ERROR;
+    }
+
+    resource->ins = ins;
+
+    return OC_STACK_OK;
+}
+
+OCResourceHandle OCGetResourceHandleAtUri(const char *uri)
+{
+    if (!uri)
+    {
+        OIC_LOG(ERROR, TAG, "Resource uri is NULL");
+        return NULL;
+    }
+
+    OCResource *pointer = headResource;
+
+    while (pointer)
+    {
+        if (strncmp(uri, pointer->uri, MAX_URI_LENGTH) == 0)
+        {
+            OIC_LOG_V(DEBUG, TAG, "Found Resource %s", uri);
+            return pointer;
+        }
+        pointer = pointer->next;
+    }
+    return NULL;
+}
+
+OCStackResult OCGetResourceIns(OCResourceHandle handle, uint8_t *ins)
+{
+    OCResource *resource = NULL;
+
+    VERIFY_NON_NULL(handle, ERROR, OC_STACK_INVALID_PARAM);
+    VERIFY_NON_NULL(ins, ERROR, OC_STACK_INVALID_PARAM);
+
+    resource = findResource((OCResource *) handle);
+    if (resource)
+    {
+        *ins = resource->ins;
+        return OC_STACK_OK;
+    }
+    return OC_STACK_ERROR;
+}
+#endif