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
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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 /// Authority + URI string to prefix well known queries
39 #define OC_WELL_KNOWN_QUERY "224.0.1.187:5683/oc/core"
40 #define OC_EXPLICIT_DEVICE_DISCOVERY_URI "224.0.1.187:5683/oc/core/d?rt=core.led"
41 /// Multicast address and port string to prefix multicast queries
42 #define OC_MULTICAST_PREFIX "224.0.1.187:5683"
43 /// IP Multicast address to use for multicast requests
44 #define OC_MULTICAST_IP "224.0.1.187"
45 /// IP Multicast port to use for multicast requests
46 #define OC_MULTICAST_PORT 5683
49 #define OC_DEFAULT_PRESENCE_TTL_SECONDS (60)
50 #define OC_MAX_PRESENCE_TTL_SECONDS (60 * 60 * 24) // 60 sec/min * 60 min/hr * 24 hr/day
51 #define OC_PRESENCE_URI "/oc/presence"
54 //-----------------------------------------------------------------------------
56 //-----------------------------------------------------------------------------
59 * Data structure to encapsulate IPv4/IPv6/Contiki/lwIP device addresses.
61 typedef struct OCDevAddr
63 uint32_t size; // length of the address stored in addr field.
64 uint8_t addr[DEV_ADDR_SIZE_MAX]; // device address.
68 * OC Virtual resources supported by every OC device.
72 OC_WELL_KNOWN_URI= 0, // "/oc/core"
73 OC_DEVICE_URI, // "/oc/core/d"
74 OC_RESOURCE_TYPES_URI, // "/oc/core/d/type"
76 OC_PRESENCE, // "/oc/presence"
78 OC_MAX_VIRTUAL_RESOURCES // Max items in the list
82 * Standard RESTful HTTP Methods.
87 OC_REST_GET = (1 << 0), // Read
88 OC_REST_PUT = (1 << 1), // Write
89 OC_REST_POST = (1 << 2), // Update
90 OC_REST_DELETE = (1 << 3), // Delete
91 // Register observe request for most up date notifications ONLY.
92 OC_REST_OBSERVE = (1 << 4),
93 // Register observe request for all notifications, including stale notifications.
94 OC_REST_OBSERVE_ALL = (1 << 5),
95 // Deregister observation, intended for internal use
96 OC_REST_CANCEL_OBSERVE = (1 << 6),
98 // Subscribe for all presence notifications of a particular resource.
99 OC_REST_PRESENCE = (1 << 7)
104 * Host Mode of Operation.
114 * Quality of Service.
121 OC_NA_QOS // No Quality is defined, let the stack decide
122 } OCQualityOfService;
125 * Resource Properties.
127 * ::OC_ACTIVE When this bit is set, the resource is initialized, otherwise the resource
128 * is 'inactive'. 'inactive' signifies that the resource has been marked for
129 * deletion or is already deleted.
130 * ::OC_DISCOVERABLE When this bit is set, the resource is allowed to be discovered by clients.
131 * ::OC_OBSERVABLE When this bit is set, the resource is allowed to be observed by clients.
132 * ::OC_SLOW When this bit is set, the resource has been marked as 'slow'. 'slow' signifies
133 * that responses from this resource can expect delays in processing its
134 * requests from clients.
135 * ::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.
151 OC_INVALID_ID = (1 << 0),
152 OC_COAP_ID = (1 << 1)
153 } OCTransportProtocolID;
164 OC_ALL // Multicast message: send over all the interfaces.
165 } OCConnectivityType;
168 * Declares Stack Results & Errors.
172 /* Success status code - START HERE */
174 OC_STACK_RESOURCE_CREATED,
175 OC_STACK_RESOURCE_DELETED,
177 /* Success status code - END HERE */
178 /* Error status code - START HERE */
179 OC_STACK_INVALID_URI = 20,
180 OC_STACK_INVALID_QUERY,
182 OC_STACK_INVALID_PORT,
183 OC_STACK_INVALID_CALLBACK,
184 OC_STACK_INVALID_METHOD,
185 OC_STACK_INVALID_PARAM,
186 OC_STACK_INVALID_OBSERVE_PARAM,
190 OC_STACK_ADAPTER_NOT_ENABLED,
192 OC_STACK_NO_RESOURCE, /* resource not found */
193 OC_STACK_RESOURCE_ERROR, /* ex: not supported method or interface */
194 OC_STACK_SLOW_RESOURCE,
195 OC_STACK_DUPLICATE_REQUEST,
196 OC_STACK_NO_OBSERVERS, /* resource has no registered observers */
197 OC_STACK_OBSERVER_NOT_FOUND,
198 OC_STACK_VIRTUAL_DO_NOT_HANDLE,
199 OC_STACK_INVALID_OPTION,
200 OC_STACK_MALFORMED_RESPONSE, /* the remote reply contained malformed data */
201 OC_STACK_PERSISTENT_BUFFER_REQUIRED,
202 OC_STACK_INVALID_REQUEST_HANDLE,
203 OC_STACK_INVALID_DEVICE_INFO,
204 OC_STACK_INVALID_JSON,
205 /* NOTE: Insert all new error codes here!*/
207 OC_STACK_PRESENCE_STOPPED = 128,
208 OC_STACK_PRESENCE_TIMEOUT,
209 OC_STACK_PRESENCE_DO_NOT_HANDLE,
212 /* Error status code - END HERE */
216 * Handle to an @ref OCDoResource invocation.
218 typedef void * OCDoHandle;
221 * Handle to an OCResource object owned by the OCStack.
223 typedef void * OCResourceHandle;
225 typedef void * OCRequestHandle;
226 typedef void * OCResponseHandle;
229 * Unique identifier for each observation request. Used when observations are
230 * registered or deregistering. Used by entity handler to signal specific
231 * observers to be notified of resource changes.
232 * There can be maximum of 256 observations per server.
234 typedef uint8_t OCObservationId;
237 * Action associated with observation.
241 OC_OBSERVE_REGISTER = 0,
242 OC_OBSERVE_DEREGISTER = 1,
243 OC_OBSERVE_NO_OPTION = 2
248 // Action associated with observation request
249 OCObserveAction action;
250 // Identifier for observation being registered/deregistered
251 OCObservationId obsId;
255 * Possible returned values from entity handler.
261 OC_EH_RESOURCE_CREATED,
262 OC_EH_RESOURCE_DELETED,
265 OC_EH_RESOURCE_NOT_FOUND
266 } OCEntityHandlerResult;
269 * This structure will be used to define the vendor specific header options to be included
270 * in communication packets.
272 typedef struct OCHeaderOption
274 // The protocol ID this option applies to
275 OCTransportProtocolID protocolID;
276 // The header option ID which will be added to communication packets
279 uint16_t optionLength;
280 // pointer to its data
281 uint8_t optionData[MAX_HEADER_OPTION_DATA_LENGTH];
285 * Incoming requests handled by the server. Requests are passed in as a parameter to the
286 * @ref OCEntityHandler callback API.
287 * @brief The @ref OCEntityHandler callback API must be implemented in the application in order
288 * to receive these requests.
292 // Associated resource
293 OCResourceHandle resource;
294 OCRequestHandle requestHandle;
295 // the REST method retrieved from received request PDU
297 // resource query send by client
299 // Information associated with observation - valid only when OCEntityHandler
300 // flag includes OC_OBSERVE_FLAG
301 OCObservationInfo obsInfo;
302 // An array of the received vendor specific header options
303 uint8_t numRcvdVendorSpecificHeaderOptions;
304 OCHeaderOption * rcvdVendorSpecificHeaderOptions;
305 // reqJSON is retrieved from the payload of the received request PDU
306 char * reqJSONPayload;
307 } OCEntityHandlerRequest;
310 * Response from queries to remote servers. Queries are made by calling the @ref OCDoResource API.
314 // Address of remote server
316 // Indicates adaptor type on which the response was received
317 OCConnectivityType connType;
318 // the is the result of our stack, OCStackResult should contain coap/other error codes;
319 OCStackResult result;
320 // If associated with observe, this will represent the sequence of notifications from server.
321 uint32_t sequenceNumber;
322 // resJSONPayload is retrieved from the payload of the received request PDU
323 const char * resJSONPayload;
324 // An array of the received vendor specific header options
325 uint8_t numRcvdVendorSpecificHeaderOptions;
326 OCHeaderOption rcvdVendorSpecificHeaderOptions[MAX_HEADER_OPTIONS];
330 * This structure describes the device properties. All non-Null properties will be included
331 * in a device discovery request.
340 char *manufacturerName;
341 char *manufacturerUrl;
343 char *dateOfManufacture;
344 char *platformVersion;
345 char *firmwareVersion;
351 // Request handle is passed to server via the entity handler for each incoming request.
352 // Stack assigns when request is received, server sets to indicate what request response is for
353 OCRequestHandle requestHandle;
354 // New handle for tracking block (or slow) response. Stack assigns, server uses for subsequent calls
355 OCResponseHandle *responseHandle;
357 OCResourceHandle resourceHandle;
358 // Allow the entity handler to pass a result with the response
359 OCEntityHandlerResult ehResult;
360 // this is the pointer to server payload data to be transferred
362 // size of server payload data. I don't think we should rely on null terminated data for size
363 uint16_t payloadSize;
364 // An array of the vendor specific header options the entity handler wishes to use in response
365 uint8_t numSendVendorSpecificHeaderOptions;
366 OCHeaderOption sendVendorSpecificHeaderOptions[MAX_HEADER_OPTIONS];
367 // URI of new resource that entity handler might create
368 char resourceUri[MAX_URI_LENGTH];
369 // Server sets to true for persistent response buffer, false for non-persistent response buffer
370 uint8_t persistentBufferFlag;
371 } OCEntityHandlerResponse;
375 OC_INIT_FLAG = (1 << 0),
376 OC_REQUEST_FLAG = (1 << 1),
377 OC_OBSERVE_FLAG = (1 << 2)
378 } OCEntityHandlerFlag; //entity_handler_flag_t ;
381 * Possible returned values from client application.
385 OC_STACK_DELETE_TRANSACTION = 0,//!< OC_STACK_DELETE_TRANSACTION
386 OC_STACK_KEEP_TRANSACTION //!< OC_STACK_KEEP_TRANSACTION
387 } OCStackApplicationResult;
389 //-----------------------------------------------------------------------------
390 // Callback function definitions
391 //-----------------------------------------------------------------------------
394 * Client applications implement this callback to consume responses received from Servers.
396 typedef OCStackApplicationResult (* OCClientResponseHandler)(void *context, OCDoHandle handle,
397 OCClientResponse * clientResponse);
400 * Client applications using a context pointer implement this callback to delete the
401 * context upon removal of the callback/context pointer from the internal callback-list.
403 typedef void (* OCClientContextDeleter)(void *context);
406 * This info is passed from application to OC Stack when initiating a request to Server.
411 OCClientResponseHandler cb;
412 OCClientContextDeleter cd;
416 * Application server implementations must implement this callback to consume requests OTA.
417 * Entity handler callback needs to fill the resPayload of the entityHandlerRequest.
419 typedef OCEntityHandlerResult (*OCEntityHandler)
420 (OCEntityHandlerFlag flag, OCEntityHandlerRequest * entityHandlerRequest);
423 * Device Entity handler need to use this call back instead of OCEntityHandler.
425 typedef OCEntityHandlerResult (*OCDeviceEntityHandler)
426 (OCEntityHandlerFlag flag, OCEntityHandlerRequest * entityHandlerRequest, char* uri);
428 //-----------------------------------------------------------------------------
429 // Function prototypes
430 //-----------------------------------------------------------------------------
433 * Initialize the OC Stack. Must be called prior to starting the stack.
436 * IP Address of host device. Deprecated parameter.
438 * Port of host device. Deprecated parameter.
440 * Host device is client, server, or client-server.
442 * @return ::OC_STACK_OK on success, some other value upon failure.
444 OCStackResult OCInit(const char *ipAddr, uint16_t port, OCMode mode);
447 * Stop the OC stack. Use for a controlled shutdown.
449 * Note: OCStop() performs operations similar to OCStopPresence(), as well as OCDeleteResource() on
450 * all resources this server is hosting. OCDeleteResource() performs operations similar to
451 * OCNotifyAllObservers() to notify all client observers that the respective resource is being
454 * @return ::OC_STACK_OK on success, some other value upon failure.
456 OCStackResult OCStop();
459 * Called in main loop of OC client or server. Allows low-level processing of
462 * @return ::OC_STACK_OK on success, some other value upon failure.
464 OCStackResult OCProcess();
467 * Discover or Perform requests on a specified resource (specified by that Resource's respective
470 * @param handle @ref OCDoHandle to refer to the request sent out on behalf of
471 * calling this API. This handle can be used to cancel this operation
472 * via the OCCancel API.
473 * Note: This reference is handled internally, and
474 * should not be free'd by the consumer. A NULL handle is permitted
475 * in the event where the caller has no use for the return value.
476 * @param method @ref OCMethod to perform on the resource.
477 * @param requiredUri URI of the resource to interact with.
478 * @param referenceUri URI of the reference resource.
479 * @param request JSON encoded request.
480 * @param conType @ref OCConnectivityType type of connectivity indicating the
481 * interface. Example: ::OC_WIFI, ::OC_ETHERNET, ::OC_ALL.
482 * @param qos Quality of service. Note that if this API is called on a uri with
483 * the well-known multicast IP address, the qos will be forced to
485 * since it is impractical to send other QOS levels on such addresses.
486 * @param cbData Asynchronous callback function that is invoked
487 * by the stack when discovery or resource interaction is complete.
488 * @param options The address of an array containing the vendor specific
489 * header options to be sent with the request.
490 * @param numOptions Number of header options to be included.
492 * Note: Presence subscription amendments (ie. adding additional resource type filters by calling
493 * this API again) require the use of the same base URI as the original request to successfully
494 * amend the presence filters.
496 * @return ::OC_STACK_OK on success, some other value upon failure.
498 OCStackResult OCDoResource(OCDoHandle *handle, OCMethod method, const char *requiredUri,
499 const char *referenceUri, const char *request, OCConnectivityType conType,
500 OCQualityOfService qos, OCCallbackData *cbData,
501 OCHeaderOption * options, uint8_t numOptions);
504 * Cancel a request associated with a specific @ref OCDoResource invocation.
506 * @param handle - Used to identify a specific OCDoResource invocation.
507 * @param qos - used to specify Quality of Service (read below for more info)
508 * @param options- used to specify vendor specific header options when sending
509 * explicit observe cancellation
510 * @param numOptions- Number of header options to be included
512 * @return ::OC_STACK_OK on success, some other value upon failure.
514 OCStackResult OCCancel(OCDoHandle handle, OCQualityOfService qos, OCHeaderOption * options,
519 * When operating in @ref OCServer or @ref OCClientServer mode, this API will start sending out
520 * presence notifications to clients via multicast. Once this API has been called with a success,
521 * clients may query for this server's presence and this server's stack will respond via multicast.
523 * Server can call this function when it comes online for the first time, or when it comes back
524 * online from offline mode, or when it re enters network.
526 * @param ttl Time To Live in seconds.
527 * Note: If ttl is '0', then the default stack value will be used (60 Seconds).
529 * If ttl is greater than OC_MAX_PRESENCE_TTL_SECONDS, then the ttl will be set to
530 * OC_MAX_PRESENCE_TTL_SECONDS.
532 * @return ::OC_STACK_OK on success, some other value upon failure.
534 OCStackResult OCStartPresence(const uint32_t ttl);
537 * When operating in @ref OCServer or @ref OCClientServer mode, this API will stop sending out
538 * presence notifications to clients via multicast. Once this API has been called with a success,
539 * this server's stack will not respond to clients querying for this server's presence.
541 * Server can call this function when it is terminating, going offline, or when going
544 * @return ::OC_STACK_OK on success, some other value upon failure.
547 OCStackResult OCStopPresence();
552 * Set default device entity handler.
554 * @param entityHandler Entity handler function that is called by ocstack to handle requests for
555 * any undefined resources or default actions.
556 * If NULL is passed it removes the device default entity handler.
558 * @return ::OC_STACK_OK on success, some other value upon failure.
560 OCStackResult OCSetDefaultDeviceEntityHandler(OCDeviceEntityHandler entityHandler);
563 * Set device information.
565 * @param deviceInfo - Structure passed by the server application containing
566 * the device information.
570 * OC_STACK_OK - no errors
571 * OC_STACK_INVALID_PARAM - invalid paramerter
572 * OC_STACK_ERROR - stack process error
574 OCStackResult OCSetDeviceInfo(OCDeviceInfo deviceInfo);
579 * @param handle Pointer to handle to newly created resource. Set by ocstack and
580 * used to refer to resource.
581 * @param resourceTypeName Name of resource type. Example: "core.led".
582 * @param resourceInterfaceName Name of resource interface. Example: "core.rw".
583 * @param uri URI of the resource. Example: "/a/led".
584 * @param entityHandler Entity handler function that is called by ocstack to handle requests, etc.
585 * NULL for default entity handler.
586 * @param resourceProperties Properties supported by resource.
587 * Example: ::OC_DISCOVERABLE|::OC_OBSERVABLE.
589 * @return ::OC_STACK_OK on success, some other value upon failure.
591 OCStackResult OCCreateResource(OCResourceHandle *handle,
592 const char *resourceTypeName,
593 const char *resourceInterfaceName,
595 OCEntityHandler entityHandler,
596 uint8_t resourceProperties);
599 * Create a resource. with host ip address for remote resource.
601 * @param handle Pointer to handle to newly created resource. Set by ocstack.
602 * Used to refer to resource.
603 * @param resourceTypeName Name of resource type. Example: "core.led".
604 * @param resourceInterfaceName Name of resource interface. Example: "core.rw".
605 * @param host HOST address of the remote resource. Example: "coap://xxx.xxx.xxx.xxx:xxxxx".
606 * @param uri URI of the resource. Example: "/a/led".
607 * @param entityHandler Entity handler function that is called by ocstack to handle requests, etc.
608 * NULL for default entity handler.
609 * @param resourceProperties Properties supported by resource.
610 * Example: ::OC_DISCOVERABLE|::OC_OBSERVABLE
612 * @return ::OC_STACK_OK on success, some other value upon failure.
614 OCStackResult OCCreateResourceWithHost(OCResourceHandle *handle,
615 const char *resourceTypeName,
616 const char *resourceInterfaceName,
619 OCEntityHandler entityHandler,
620 uint8_t resourceProperties);
623 * Add a resource to a collection resource.
625 * @param collectionHandle Handle to the collection resource.
626 * @param resourceHandle Handle to resource to be added to the collection resource.
628 * @return ::OC_STACK_OK on success, some other value upon failure.
630 OCStackResult OCBindResource(OCResourceHandle collectionHandle, OCResourceHandle resourceHandle);
633 * Remove a resource from a collection resource.
635 * @param collectionHandle Handle to the collection resource.
636 * @param resourceHandle Handle to resource to be removed from the collection resource.
638 * @return ::OC_STACK_OK on success, some other value upon failure.
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".
648 * @return ::OC_STACK_OK on success, some other value upon failure.
650 OCStackResult OCBindResourceTypeToResource(OCResourceHandle handle,
651 const char *resourceTypeName);
653 * Bind a resource interface to a resource.
655 * @param handle Handle to the resource.
656 * @param resourceInterfaceName Name of resource interface. Example: "core.rw".
658 * @return ::OC_STACK_OK on success, some other value upon failure.
660 OCStackResult OCBindResourceInterfaceToResource(OCResourceHandle handle,
661 const char *resourceInterfaceName);
664 * Bind an entity handler to the resource.
666 * @param handle Handle to the resource that the contained resource is to be bound.
667 * @param entityHandler Entity handler function that is called by ocstack to handle requests, etc.
668 * @return ::OC_STACK_OK on success, some other value upon failure.
670 OCStackResult OCBindResourceHandler(OCResourceHandle handle, OCEntityHandler entityHandler);
673 * Get the number of resources that have been created in the stack.
675 * @param numResources Pointer to count variable.
677 * @return ::OC_STACK_OK on success, some other value upon failure.
679 OCStackResult OCGetNumberOfResources(uint8_t *numResources);
682 * Get a resource handle by index.
684 * @param index Index of resource, 0 to Count - 1.
686 * @return Found resource handle or NULL if not found.
688 OCResourceHandle OCGetResourceHandle(uint8_t index);
691 * Delete resource specified by handle. Deletes resource and all resourcetype and resourceinterface
694 * Note: OCDeleteResource() performs operations similar to OCNotifyAllObservers() to notify all
695 * client observers that "this" resource is being deleted.
697 * @param handle Handle of resource to be deleted.
699 * @return ::OC_STACK_OK on success, some other value upon failure.
701 OCStackResult OCDeleteResource(OCResourceHandle handle);
704 * Get the URI of the resource specified by handle.
706 * @param handle Handle of resource.
707 * @return URI string if resource found or NULL if not found.
709 const char *OCGetResourceUri(OCResourceHandle handle);
712 * Get the properties of the resource specified by handle.
713 * NOTE: that after a resource is created, the OC_ACTIVE property is set
714 * for the resource by the stack.
716 * @param handle Handle of resource.
717 * @return OCResourceProperty Bitmask or -1 if resource is not found.
719 OCResourceProperty OCGetResourceProperties(OCResourceHandle handle);
722 * Get the number of resource types of the resource.
724 * @param handle Handle of resource.
725 * @param numResourceTypes Pointer to count variable.
727 * @return ::OC_STACK_OK on success, some other value upon failure.
729 OCStackResult OCGetNumberOfResourceTypes(OCResourceHandle handle, uint8_t *numResourceTypes);
732 * Get name of resource type of the resource.
734 * @param handle Handle of resource.
735 * @param index Index of resource, 0 to Count - 1.
737 * @return Resource type name if resource found or NULL if resource not found.
739 const char *OCGetResourceTypeName(OCResourceHandle handle, uint8_t index);
742 * Get the number of resource interfaces of the resource.
744 * @param handle Handle of resource.
745 * @param numResourceInterfaces Pointer to count variable.
747 * @return ::OC_STACK_OK on success, some other value upon failure.
749 OCStackResult OCGetNumberOfResourceInterfaces(OCResourceHandle handle,
750 uint8_t *numResourceInterfaces);
753 * Get name of resource interface of the resource.
755 * @param handle Handle of resource.
756 * @param index Index of resource, 0 to Count - 1.
758 * @return Resource interface name if resource found or NULL if resource not found.
760 const char *OCGetResourceInterfaceName(OCResourceHandle handle, uint8_t index);
763 * Get methods of resource interface of the resource.
765 * @param handle Handle of resource.
766 * @param index Index of resource, 0 to Count - 1.
768 * @return Allowed methods if resource found or NULL if resource not found.
770 uint8_t OCGetResourceInterfaceAllowedMethods(OCResourceHandle handle, uint8_t index);
773 * Get resource handle from the collection resource by index.
775 * @param collectionHandle Handle of collection resource.
776 * @param index Index of contained resource, 0 to Count - 1.
778 * @return Handle to contained resource if resource found or NULL if resource not found.
780 OCResourceHandle OCGetResourceHandleFromCollection(OCResourceHandle collectionHandle,
784 * Get the entity handler for a resource.
786 * @param handle Handle of resource.
788 * @return Entity handler if resource found or NULL resource not found.
790 OCEntityHandler OCGetResourceHandler(OCResourceHandle handle);
793 * Notify all registered observers that the resource representation has
794 * changed. If observation includes a query the client is notified only
795 * if the query is valid after the resource representation has changed.
797 * @param handle Handle of resource.
798 * @param qos Desired quality of service for the observation notifications.
800 * @return ::OC_STACK_OK on success, some other value upon failure.
802 OCStackResult OCNotifyAllObservers(OCResourceHandle handle, OCQualityOfService qos);
805 * Notify specific observers with updated value of representation.
806 * Before this API is invoked by entity handler it has finished processing
807 * queries for the associated observers.
809 * @param handle Handle of resource.
810 * @param obsIdList List of observation ids that need to be notified.
811 * @param numberOfIds Number of observation ids included in obsIdList.
812 * @param notificationJSONPayload JSON encoded payload to send in notification.
813 * @param qos Desired quality of service of the observation notifications.
814 * NOTE: The memory for obsIdList and notificationJSONPayload is managed by the
815 * entity invoking the API. The maximum size of the notification is 1015 bytes
816 * for non-Arduino platforms. For Arduino the maximum size is 247 bytes.
818 * @return ::OC_STACK_OK on success, some other value upon failure.
821 OCNotifyListOfObservers (OCResourceHandle handle,
822 OCObservationId *obsIdList,
824 const char *notificationJSONPayload,
825 OCQualityOfService qos);
829 * Send a response to a request.
830 * The response can be a normal, slow, or block (i.e. a response that
831 * is too large to be sent in a single PDU and must span multiple transmissions).
833 * @param response Pointer to structure that contains response parameters.
835 * @return ::OC_STACK_OK on success, some other value upon failure.
837 OCStackResult OCDoResponse(OCEntityHandlerResponse *response);
840 * Cancel a response. Applies to a block response.
842 * @param responseHandle Response handle set by stack in OCServerResponse after
843 * OCDoResponse is called.
845 * @return ::OC_STACK_OK on success, some other value upon failure.
847 OCStackResult OCCancelResponse(OCResponseHandle responseHandle);
852 * This method is used to retrieved the IPv4 address from OCDev address
855 * @param ipAddr OCDevAddr address.
856 * @param a first byte of IPv4 address.
857 * @param b second byte of IPv4 address.
858 * @param c third byte of IPv4 address.
859 * @param d fourth byte of IPv4 address.
860 * @return ::OC_STACK_OK on success, some other value upon failure.
862 int32_t OCDevAddrToIPv4Addr(OCDevAddr *ipAddr, uint8_t *a, uint8_t *b,
863 uint8_t *c, uint8_t *d );
866 * This method is used to retrieve the port number from OCDev address
869 * @param ipAddr OCDevAddr address.
870 * @param port Port number.
871 * @return ::OC_STACK_OK on success, some other value upon failure.
873 int32_t OCDevAddrToPort(OCDevAddr *ipAddr, uint16_t *port);
877 #endif // __cplusplus
879 #endif /* OCSTACK_H_ */