1 //******************************************************************
3 // Copyright 2014 Intel Mobile Communications GmbH All Rights Reserved.
5 //-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=
7 // Licensed under the Apache License, Version 2.0 (the "License");
8 // you may not use this file except in compliance with the License.
9 // You may obtain a copy of the License at
11 // http://www.apache.org/licenses/LICENSE-2.0
13 // Unless required by applicable law or agreed to in writing, software
14 // distributed under the License is distributed on an "AS IS" BASIS,
15 // WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
16 // See the License for the specific language governing permissions and
17 // limitations under the License.
19 //-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=
25 #include "ocstackconfig.h"
31 //-----------------------------------------------------------------------------
33 //-----------------------------------------------------------------------------
35 //TODO: May want to refactor this in upcoming sprints.
36 //Don't want to expose to application layer that lower level stack is using CoAP.
38 #define OC_WELL_KNOWN_QUERY "224.0.1.187:5683/oc/core"
39 #define OC_EXPLICIT_DEVICE_DISCOVERY_URI "224.0.1.187:5683/oc/core/d?rt=core.led"
40 #define OC_MULTICAST_PREFIX "224.0.1.187:5683"
41 #define OC_MULTICAST_IP "224.0.1.187"
43 #define USE_RANDOM_PORT (0)
45 #define OC_DEFAULT_PRESENCE_TTL (60)
46 #define OC_PRESENCE_URI "/oc/presence"
47 extern uint8_t PresenceTimeOutSize; // length of PresenceTimeOut - 1
48 extern uint32_t PresenceTimeOut[];
51 //-----------------------------------------------------------------------------
53 //-----------------------------------------------------------------------------
55 /** This would need to be modified for specific platforms and specific
58 #define DEV_ADDR_SIZE_MAX (16)
61 * Data structure to encapsulate IPv4/IPv6/Contiki/lwIP device addresses
64 typedef struct OCDevAddr
66 uint32_t size; /**< length of the address stored in addr field. */
67 uint8_t addr[DEV_ADDR_SIZE_MAX]; /**< device address. */
71 * OC Virtual resources supported by every OC device
75 OC_WELL_KNOWN_URI= 0, // "/oc/core"
76 OC_DEVICE_URI, // "/oc/core/d"
77 OC_RESOURCE_TYPES_URI, // "/oc/core/d/type"
79 OC_PRESENCE, // "/oc/presence"
81 OC_MAX_VIRTUAL_RESOURCES // Max items in the list
85 * Standard RESTful HTTP Methods
89 OC_REST_GET = (1 << 0), // Read
90 OC_REST_PUT = (1 << 1), // Write
91 OC_REST_POST = (1 << 2), // Update
92 OC_REST_DELETE = (1 << 3), // Delete
93 // Register observe request for most up date notifications ONLY.
94 OC_REST_OBSERVE = (1 << 4),
95 // Register observe request for all notifications, including stale notifications.
96 OC_REST_OBSERVE_ALL = (1 << 5),
97 // Deregister observation, intended for internal use
98 OC_REST_CANCEL_OBSERVE = (1 << 6),
100 // Subscribe for all presence notifications of a particular resource.
101 OC_REST_PRESENCE = (1 << 7)
106 * Host Mode of Operation
114 extern OCMode myStackMode;
122 OC_NA_QOS // No Quality is defined, let the stack decide
123 } OCQualityOfService;
126 * Resource Properties
128 * OC_ACTIVE - When this bit is set, the resource is initialized, otherwise the resource
129 * is 'inactive'. 'inactive' signifies that the resource has been marked for
130 * deletion or is already deleted.
131 * OC_DISCOVERABLE - When this bit is set, the resource is allowed to be discovered by clients.
132 * OC_OBSERVABLE - When this bit is set, the resource is allowed to be observed by clients.
133 * OC_SLOW - When this bit is set, the resource has been marked as 'slow'. 'slow' signifies
134 * that responses from this resource can expect delays in processing its
135 * requests from clients.
136 * OC_SECURE - When this bit is set, the resource is a secure resource.
139 OC_ACTIVE = (1 << 0),
140 OC_DISCOVERABLE = (1 << 1),
141 OC_OBSERVABLE = (1 << 2),
144 } OCResourceProperty;
147 * Transport Protocol IDs
150 OC_INVALID_ID = (1 << 0),
151 OC_COAP_ID = (1 << 1)
152 } OCTransportProtocolID;
162 OC_ALL //Multicast message: send over all the interfaces.
163 } OCConnectivityType;
166 * Declares Stack Results & Errors
169 /* Success status code - START HERE */
171 OC_STACK_RESOURCE_CREATED,
172 OC_STACK_RESOURCE_DELETED,
174 /* Success status code - END HERE */
175 /* Error status code - START HERE */
176 OC_STACK_INVALID_URI = 20,
177 OC_STACK_INVALID_QUERY,
179 OC_STACK_INVALID_PORT,
180 OC_STACK_INVALID_CALLBACK,
181 OC_STACK_INVALID_METHOD,
182 OC_STACK_INVALID_PARAM,
183 OC_STACK_INVALID_OBSERVE_PARAM,
187 OC_STACK_ADAPTER_NOT_ENABLED,
189 OC_STACK_NO_RESOURCE, /* resource not found */
190 OC_STACK_RESOURCE_ERROR, /* ex: not supported method or interface */
191 OC_STACK_SLOW_RESOURCE,
192 OC_STACK_NO_OBSERVERS, /* resource has no registered observers */
193 OC_STACK_OBSERVER_NOT_FOUND,
194 OC_STACK_VIRTUAL_DO_NOT_HANDLE,
195 OC_STACK_INVALID_OPTION,
196 OC_STACK_MALFORMED_RESPONSE, /* the remote reply contained malformed data */
197 OC_STACK_PERSISTENT_BUFFER_REQUIRED,
198 OC_STACK_INVALID_REQUEST_HANDLE,
199 OC_STACK_INVALID_DEVICE_INFO,
200 OC_STACK_INVALID_JSON,
201 /* NOTE: Insert all new error codes here!*/
203 OC_STACK_PRESENCE_STOPPED = 128,
204 OC_STACK_PRESENCE_TIMEOUT,
205 OC_STACK_PRESENCE_DO_NOT_HANDLE,
208 /* Error status code - END HERE */
212 * Handle to an @ref OCDoResource invocation.
214 typedef void * OCDoHandle;
217 * Handle to an OCResource object owned by the OCStack.
219 typedef void * OCResourceHandle;
221 typedef void * OCRequestHandle;
222 typedef void * OCResponseHandle;
225 * Unique identifier for each observation request. Used when observations are
226 * registered or deregistering. Used by entity handler to signal specific
227 * observers to be notified of resource changes.
228 * There can be maximum of 256 observations per server.
230 typedef uint8_t OCObservationId;
233 * Action associated with observation
236 OC_OBSERVE_REGISTER = 0,
237 OC_OBSERVE_DEREGISTER = 1,
238 OC_OBSERVE_NO_OPTION = 2
242 // Action associated with observation request
243 OCObserveAction action;
244 // Identifier for observation being registered/deregistered
245 OCObservationId obsId;
249 * Possible returned values from entity handler
254 OC_EH_RESOURCE_CREATED,
255 OC_EH_RESOURCE_DELETED,
258 } OCEntityHandlerResult;
260 // following structure will be used to define the vendor specific header options to be included
261 // in communication packets
263 typedef struct OCHeaderOption {
264 // The protocol ID this option applies to
265 OCTransportProtocolID protocolID;
266 // The header option ID which will be added to communication packets
269 uint16_t optionLength;
270 // pointer to its data
271 uint8_t optionData[MAX_HEADER_OPTION_DATA_LENGTH];
275 * Incoming requests handled by the server. Requests are passed in as a parameter to the @ref OCEntityHandler callback API.
276 * @brief The @ref OCEntityHandler callback API must be implemented in the application in order to receive these requests.
279 // Associated resource
280 OCResourceHandle resource;
281 OCRequestHandle requestHandle;
282 // the REST method retrieved from received request PDU
284 // resource query send by client
285 unsigned char * query;
286 // Information associated with observation - valid only when OCEntityHandler
287 // flag includes OC_OBSERVE_FLAG
288 OCObservationInfo obsInfo;
289 // An array of the received vendor specific header options
290 uint8_t numRcvdVendorSpecificHeaderOptions;
291 OCHeaderOption * rcvdVendorSpecificHeaderOptions;
292 // reqJSON is retrieved from the payload of the received request PDU
293 unsigned char * reqJSONPayload;
294 }OCEntityHandlerRequest;
297 * Response from queries to remote servers. Queries are made by calling the @ref OCDoResource API.
300 // Address of remote server
302 // Indicates adaptor type on which the response was received
303 OCConnectivityType connType;
304 // the is the result of our stack, OCStackResult should contain coap/other error codes;
305 OCStackResult result;
306 // If associated with observe, this will represent the sequence of notifications from server.
307 uint32_t sequenceNumber;
308 // resJSONPayload is retrieved from the payload of the received request PDU
309 unsigned const char * resJSONPayload;
310 // An array of the received vendor specific header options
311 uint8_t numRcvdVendorSpecificHeaderOptions;
312 OCHeaderOption rcvdVendorSpecificHeaderOptions[MAX_HEADER_OPTIONS];
316 * Following structure describes the device properties. All non-Null properties will be included
317 * in a device discovery request.
326 char *manufacturerName;
327 char *manufacturerUrl;
329 char *dateOfManufacture;
330 char *platformVersion;
331 char *firmwareVersion;
337 // Request handle is passed to server via the entity handler for each incoming request.
338 // Stack assigns when request is received, server sets to indicate what request response is for
339 OCRequestHandle requestHandle;
340 // New handle for tracking block (or slow) response. Stack assigns, server uses for subsequent calls
341 OCResponseHandle *responseHandle;
343 OCResourceHandle resourceHandle;
344 // Allow the entity handler to pass a result with the response
345 OCEntityHandlerResult ehResult;
346 // this is the pointer to server payload data to be transferred
347 unsigned char *payload;
348 // size of server payload data. I don't think we should rely on null terminated data for size
349 uint16_t payloadSize;
350 // An array of the vendor specific header options the entity handler wishes to use in response
351 uint8_t numSendVendorSpecificHeaderOptions;
352 OCHeaderOption sendVendorSpecificHeaderOptions[MAX_HEADER_OPTIONS];
353 // URI of new resource that entity handler might create
354 unsigned char resourceUri[MAX_URI_LENGTH];
355 // Server sets to true for persistent response buffer, false for non-persistent response buffer
356 uint8_t persistentBufferFlag;
357 } OCEntityHandlerResponse;
360 OC_INIT_FLAG = (1 << 0),
361 OC_REQUEST_FLAG = (1 << 1),
362 OC_OBSERVE_FLAG = (1 << 2)
363 } OCEntityHandlerFlag; //entity_handler_flag_t ;
365 // possible returned values from client application
367 OC_STACK_DELETE_TRANSACTION = 0,
368 OC_STACK_KEEP_TRANSACTION
369 } OCStackApplicationResult;
371 //-----------------------------------------------------------------------------
372 // Callback function definitions
373 //-----------------------------------------------------------------------------
376 * Client applications implement this callback to consume responses received from Servers.
378 typedef OCStackApplicationResult (* OCClientResponseHandler)(void *context, OCDoHandle handle,
379 OCClientResponse * clientResponse);
382 * Client applications using a context pointer implement this callback to delete the
383 * context upon removal of the callback/context pointer from the internal callback-list
385 typedef void (* OCClientContextDeleter)(void *context);
388 * This info is passed from application to OC Stack when initiating a request to Server
392 OCClientResponseHandler cb;
393 OCClientContextDeleter cd;
397 * Application server implementations must implement this callback to consume requests OTA.
398 * Entity handler callback needs to fill the resPayload of the entityHandlerRequest.
400 typedef OCEntityHandlerResult (*OCEntityHandler)
401 (OCEntityHandlerFlag flag, OCEntityHandlerRequest * entityHandlerRequest);
404 * Device Entity handler need to use this call back instead of OCEntityHandler
406 typedef OCEntityHandlerResult (*OCDeviceEntityHandler)
407 (OCEntityHandlerFlag flag, OCEntityHandlerRequest * entityHandlerRequest, char* uri);
409 //-----------------------------------------------------------------------------
410 // Function prototypes
411 //-----------------------------------------------------------------------------
414 * Initialize the OC Stack. Must be called prior to starting the stack.
417 * IP Address of host device
419 * Port of host device
421 * Host device is client, server, or client-server
424 * OC_STACK_OK - no errors
425 * OC_STACK_ERROR - stack init error
427 OCStackResult OCInit(const char *ipAddr, uint16_t port, OCMode mode);
430 * Stop the OC stack. Use for a controlled shutdown.
432 * Note: OCStop() performs operations similar to OCStopPresence(), as well as OCDeleteResource() on
433 * all resources this server is hosting. OCDeleteResource() performs operations similar to
434 * OCNotifyAllObservers() to notify all client observers that the respective resource is being
438 * OC_STACK_OK - no errors
439 * OC_STACK_ERROR - stack not initialized
441 OCStackResult OCStop();
444 * Called in main loop of OC client or server. Allows low-level processing of
448 * OC_STACK_OK - no errors
449 * OC_STACK_ERROR - stack process error
451 OCStackResult OCProcess();
454 * Discover or Perform requests on a specified resource (specified by that Resource's respective
457 * @param handle - @ref OCDoHandle to refer to the request sent out on behalf of
459 * @param method - @ref OCMethod to perform on the resource
460 * @param requiredUri - URI of the resource to interact with
461 * @param referenceUri - URI of the reference resource
462 * @param request - JSON encoded request
463 * @param conType - @ref OCConnectivityType type of connectivity indicating the
464 * interface. Example: OC_WIFI, OC_ETHERNET, OC_ALL
465 * @param qos - quality of service. Note that if this API is called on a uri with
466 * the well-known multicast IP address, the qos will be forced to
468 * since it is impractical to send other QOS levels on such addresses.
469 * @param clientApplicationCB- asynchronous callback function that is invoked
470 * by the stack when discovery or resource interaction is complete
471 * @param options - The address of an array containing the vendor specific
472 * header options to be sent with the request
473 * @param numOptions - Number of header options to be included
475 * Note: Presence subscription amendments (ie. adding additional resource type filters by calling
476 * this API again) require the use of the same base URI as the original request to successfully
477 * amend the presence filters.
480 * OC_STACK_OK - no errors
481 * OC_STACK_INVALID_CALLBACK - invalid callback function pointer
482 * OC_STACK_INVALID_METHOD - invalid resource method
483 * OC_STACK_INVALID_URI - invalid required or reference URI
484 * OC_STACK_INVALID_QUERY - number of resource types specified for filtering presence
485 * notifications exceeds @ref MAX_PRESENCE_FILTERS.
487 OCStackResult OCDoResource(OCDoHandle *handle, OCMethod method, const char *requiredUri,
488 const char *referenceUri, const char *request, OCConnectivityType conType,
489 OCQualityOfService qos, OCCallbackData *cbData,
490 OCHeaderOption * options, uint8_t numOptions);
493 * Cancel a request associated with a specific @ref OCDoResource invocation.
495 * @param handle - Used to identify a specific OCDoResource invocation.
496 * @param qos - used to specify Quality of Service (read below for more info)
497 * @param options- used to specify vendor specific header options when sending
498 * explicit observe cancellation
499 * @param numOptions- Number of header options to be included
502 * OC_STACK_OK - No errors; Success
503 * OC_STACK_INVALID_PARAM - The handle provided is invalid.
505 OCStackResult OCCancel(OCDoHandle handle, OCQualityOfService qos, OCHeaderOption * options,
510 * When operating in @ref OCServer or @ref OCClientServer mode, this API will start sending out
511 * presence notifications to clients via multicast. Once this API has been called with a success,
512 * clients may query for this server's presence and this server's stack will respond via multicast.
514 * Server can call this function when it comes online for the first time, or when it comes back
515 * online from offline mode, or when it re enters network.
517 * @param ttl - Time To Live in seconds
518 * Note: If ttl is '0', then the default stack value will be used (60 Seconds).
521 * OC_STACK_OK - No errors; Success
523 OCStackResult OCStartPresence(const uint32_t ttl);
526 * When operating in @ref OCServer or @ref OCClientServer mode, this API will stop sending out
527 * presence notifications to clients via multicast. Once this API has been called with a success,
528 * this server's stack will not respond to clients querying for this server's presence.
530 * Server can call this function when it is terminating, going offline, or when going
534 * OC_STACK_OK - No errors; Success
537 OCStackResult OCStopPresence();
542 * Set default device entity handler
544 * @param entityHandler - entity handler function that is called by ocstack to handle requests for
545 * any undefined resources or default actions.
546 * if NULL is passed it removes the device default entity handler.
549 * OC_STACK_OK - no errors
550 * OC_STACK_ERROR - stack process error
552 OCStackResult OCSetDefaultDeviceEntityHandler(OCDeviceEntityHandler entityHandler);
555 * Set device information.
557 * @param deviceInfo - Structure passed by the server application containing
558 * the device information.
562 * OC_STACK_OK - no errors
563 * OC_STACK_INVALID_PARAM - invalid paramerter
564 * OC_STACK_ERROR - stack process error
566 OCStackResult OCSetDeviceInfo(OCDeviceInfo deviceInfo);
571 * @param handle - pointer to handle to newly created resource. Set by ocstack. Used to refer to resource
572 * @param resourceTypeName - name of resource type. Example: "core.led"
573 * @param resourceInterfaceName - name of resource interface. Example: "core.rw"
574 * @param uri - URI of the resource. Example: "/a/led"
575 * @param entityHandler - entity handler function that is called by ocstack to handle requests, etc
576 * NULL for default entity handler
577 * @param resourceProperties - properties supported by resource. Example: OC_DISCOVERABLE|OC_OBSERVABLE
580 * OC_STACK_OK - no errors
581 * OC_STACK_ERROR - stack process error
583 OCStackResult OCCreateResource(OCResourceHandle *handle,
584 const char *resourceTypeName,
585 const char *resourceInterfaceName,
587 OCEntityHandler entityHandler,
588 uint8_t resourceProperties);
591 * Create a resource. with host ip address for remote resource
593 * @param handle - pointer to handle to newly created resource. Set by ocstack.
594 * Used to refer to resource
595 * @param resourceTypeName - name of resource type. Example: "core.led"
596 * @param resourceInterfaceName - name of resource interface. Example: "core.rw"
597 * @param host - HOST address of the remote resource. Example: "coap://xxx.xxx.xxx.xxx:xxxxx"
598 * @param uri - URI of the resource. Example: "/a/led"
599 * @param entityHandler - entity handler function that is called by ocstack to handle requests, etc
600 * NULL for default entity handler
601 * @param resourceProperties - properties supported by resource.
602 * Example: OC_DISCOVERABLE|OC_OBSERVABLE
605 * OC_STACK_OK - no errors
606 * OC_STACK_ERROR - stack process error
608 OCStackResult OCCreateResourceWithHost(OCResourceHandle *handle,
609 const char *resourceTypeName,
610 const char *resourceInterfaceName,
613 OCEntityHandler entityHandler,
614 uint8_t resourceProperties);
617 * Add a resource to a collection resource.
619 * @param collectionHandle - handle to the collection resource
620 * @param resourceHandle - handle to resource to be added to the collection resource
623 * OC_STACK_OK - no errors
624 * OC_STACK_ERROR - stack process error
625 * OC_STACK_INVALID_PARAM - invalid collectionhandle
627 OCStackResult OCBindResource(OCResourceHandle collectionHandle, OCResourceHandle resourceHandle);
630 * Remove a resource from a collection resource.
632 * @param collectionHandle - handle to the collection resource
633 * @param resourceHandle - handle to resource to be removed from the collection resource
636 * OC_STACK_OK - no errors
637 * OC_STACK_ERROR - stack process error
638 * OC_STACK_INVALID_PARAM - invalid collectionhandle
640 OCStackResult OCUnBindResource(OCResourceHandle collectionHandle, OCResourceHandle resourceHandle);
643 * Bind a resourcetype to a resource.
645 * @param handle - handle to the resource
646 * @param resourceTypeName - name of resource type. Example: "core.led"
649 * OC_STACK_OK - no errors
650 * OC_STACK_ERROR - stack process error
652 OCStackResult OCBindResourceTypeToResource(OCResourceHandle handle,
653 const char *resourceTypeName);
655 * Bind a resource interface to a resource.
657 * @param handle - handle to the resource
658 * @param resourceInterfaceName - name of resource interface. Example: "core.rw"
661 * OC_STACK_OK - no errors
662 * OC_STACK_ERROR - stack process error
664 OCStackResult OCBindResourceInterfaceToResource(OCResourceHandle handle,
665 const char *resourceInterfaceName);
668 * Bind an entity handler to the resource.
670 * @param handle - handle to the resource that the contained resource is to be bound
671 * @param entityHandler - entity handler function that is called by ocstack to handle requests, etc
673 * OC_STACK_OK - no errors
674 * OC_STACK_ERROR - stack process error
676 OCStackResult OCBindResourceHandler(OCResourceHandle handle, OCEntityHandler entityHandler);
679 * Get the number of resources that have been created in the stack.
681 * @param numResources - pointer to count variable
684 * OC_STACK_OK - no errors
685 * OC_STACK_ERROR - stack process error
688 OCStackResult OCGetNumberOfResources(uint8_t *numResources);
691 * Get a resource handle by index.
693 * @param index - index of resource, 0 to Count - 1
696 * Resource handle - if found
697 * NULL - if not found
699 OCResourceHandle OCGetResourceHandle(uint8_t index);
702 * Delete resource specified by handle. Deletes resource and all resourcetype and resourceinterface
705 * Note: OCDeleteResource() performs operations similar to OCNotifyAllObservers() to notify all
706 * client observers that "this" resource is being deleted.
708 * @param handle - handle of resource to be deleted
711 * OC_STACK_OK - no errors
712 * OC_STACK_ERROR - stack process error
714 OCStackResult OCDeleteResource(OCResourceHandle handle);
717 * Get the URI of the resource specified by handle.
719 * @param handle - handle of resource
721 * URI string - if resource found
722 * NULL - resource not found
724 const char *OCGetResourceUri(OCResourceHandle handle);
727 * Get the properties of the resource specified by handle.
728 * NOTE: that after a resource is created, the OC_ACTIVE property is set
729 * for the resource by the stack.
731 * @param handle - handle of resource
733 * property bitmap - if resource found
734 * NULL - resource not found
736 uint8_t OCGetResourceProperties(OCResourceHandle handle);
739 * Get the number of resource types of the resource.
741 * @param handle - handle of resource
742 * @param numResourceTypes - pointer to count variable
745 * OC_STACK_OK - no errors
746 * OC_STACK_ERROR - stack process error
748 OCStackResult OCGetNumberOfResourceTypes(OCResourceHandle handle, uint8_t *numResourceTypes);
751 * Get name of resource type of the resource.
753 * @param handle - handle of resource
754 * @param index - index of resource, 0 to Count - 1
757 * resource type name - if resource found
758 * NULL - resource not found
760 const char *OCGetResourceTypeName(OCResourceHandle handle, uint8_t index);
763 * Get the number of resource interfaces of the resource.
765 * @param handle - handle of resource
766 * @param numResources - pointer to count variable
769 * OC_STACK_OK - no errors
770 * OC_STACK_ERROR - stack process error
773 OCStackResult OCGetNumberOfResourceInterfaces(OCResourceHandle handle, uint8_t *numResourceInterfaces);
776 * Get name of resource interface of the resource.
778 * @param handle - handle of resource
779 * @param index - index of resource, 0 to Count - 1
782 * resource interface name - if resource found
783 * NULL - resource not found
785 const char *OCGetResourceInterfaceName(OCResourceHandle handle, uint8_t index);
788 * Get methods of resource interface of the resource.
790 * @param handle - handle of resource
791 * @param index - index of resource, 0 to Count - 1
794 * allowed methods - if resource found
795 * NULL - resource not found
797 uint8_t OCGetResourceInterfaceAllowedMethods(OCResourceHandle handle, uint8_t index);
800 * Get resource handle from the collection resource by index.
802 * @param collectionHandle - handle of collection resource
803 * @param index - index of contained resource, 0 to Count - 1
806 * handle to contained resource - if resource found
807 * NULL - resource not found
809 OCResourceHandle OCGetResourceHandleFromCollection(OCResourceHandle collectionHandle, uint8_t index);
812 * Get the entity handler for a resource.
814 * @param handle - handle of resource
817 * entity handler - if resource found
818 * NULL - resource not found
820 OCEntityHandler OCGetResourceHandler(OCResourceHandle handle);
823 * Notify all registered observers that the resource representation has
824 * changed. If observation includes a query the client is notified only
825 * if the query is valid after the resource representation has changed.
827 * @param handle - handle of resource
830 * OC_STACK_OK - no errors
831 * OC_STACK_NO_RESOURCE - invalid resource handle
832 * OC_STACK_NO_OBSERVERS - no more observers intrested in resource
834 OCStackResult OCNotifyAllObservers(OCResourceHandle handle, OCQualityOfService qos);
837 * Notify specific observers with updated value of representation.
838 * Before this API is invoked by entity handler it has finished processing
839 * queries for the associated observers.
841 * @param handle - handle of resource
842 * @param obsIdList - list of observation ids that need to be notified
843 * @param numberOfIds - number of observation ids included in obsIdList
844 * @param notificationJSONPayload - JSON encoded payload to send in notification
845 * @param qos - desired quality of service of the observation notifications
846 * NOTE: The memory for obsIdList and notificationJSONPayload is managed by the
847 * entity invoking the API. The maximum size of the notification is 1015 bytes
848 * for non-Arduino platforms. For Arduino the maximum size is 247 bytes.
851 * OC_STACK_OK - no errors
852 * OC_STACK_NO_RESOURCE - invalid resource handle
855 OCNotifyListOfObservers (OCResourceHandle handle,
856 OCObservationId *obsIdList,
858 unsigned char *notificationJSONPayload,
859 OCQualityOfService qos);
863 * Send a response to a request.
864 * The response can be a normal, slow, or block (i.e. a response that
865 * is too large to be sent in a single PDU and must span multiple transmissions)
867 * @param response - pointer to structure that contains response parameters
870 * OC_STACK_OK - no errors
872 OCStackResult OCDoResponse(OCEntityHandlerResponse *response);
875 * Cancel a response. Applies to a block response
877 * @param responseHandle - response handle set by stack in OCServerResponse after
878 * OCDoResponse is called
881 * OC_STACK_OK - No errors; Success
882 * OC_STACK_INVALID_PARAM - The handle provided is invalid.
884 OCStackResult OCCancelResponse(OCResponseHandle responseHandle);
888 //-- OCDevAddrToIPv4Addr -------------------------------------------------
890 * This method is used to retrieved the IPv4 address from OCDev address
895 * @param[out] a first byte of IPv4 address.
896 * @param[out] b second byte of IPv4 address.
897 * @param[out] c third byte of IPv4 address.
898 * @param[out] d fourth byte of IPv4 address.
900 * @retval 0 for Success, otherwise some error value
902 //------------------------------------------------------------------------
903 int32_t OCDevAddrToIPv4Addr(OCDevAddr *ipAddr, uint8_t *a, uint8_t *b,
904 uint8_t *c, uint8_t *d );
907 //-- OCDevAddrToPort -------------------------------------------------
909 * This method is used to retrieve the port number from OCDev address
917 * @retval 0 for Success, otherwise some error value
919 //------------------------------------------------------------------------
920 int32_t OCDevAddrToPort(OCDevAddr *ipAddr, uint16_t *port);
924 #endif // __cplusplus
926 #endif /* OCSTACK_H_ */