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.
37 #define OC_WELL_KNOWN_QUERY "coap://224.0.1.187:5683/oc/core"
38 #define OC_EXPLICIT_DEVICE_DISCOVERY_URI "coap://224.0.1.187:5683/oc/core?rt=core.led"
39 #define OC_MULTICAST_PREFIX "coap://224.0.1.187:5683"
40 #define OC_MULTICAST_IP "coap://224.0.1.187"
42 #define USE_RANDOM_PORT (0)
44 #define OC_DEFAULT_PRESENCE_TTL (60)
45 #define OC_PRESENCE_URI "/oc/presence"
46 extern uint8_t PresenceTimeOutSize; // length of PresenceTimeOut - 1
47 extern uint32_t PresenceTimeOut[];
49 //-----------------------------------------------------------------------------
51 //-----------------------------------------------------------------------------
54 * OC Virtual resources supported by every OC device
57 OC_WELL_KNOWN_URI= 0, // "/oc/core"
58 OC_DEVICE_URI, // "/oc/core/d"
59 OC_RESOURCE_TYPES_URI, // "/oc/core/d/type"
61 OC_PRESENCE, // "/oc/presence"
63 OC_MAX_VIRTUAL_RESOURCES // Max items in the list
67 * Standard RESTful HTTP Methods
71 OC_REST_GET = (1 << 0), // Read
72 OC_REST_PUT = (1 << 1), // Write
73 OC_REST_POST = (1 << 2), // Update
74 OC_REST_DELETE = (1 << 3), // Delete
75 // Register observe request for most up date notifications ONLY.
76 OC_REST_OBSERVE = (1 << 4),
77 // Register observe request for all notifications, including stale notifications.
78 OC_REST_OBSERVE_ALL = (1 << 5),
79 // Deregister observation, intended for internal use
80 OC_REST_CANCEL_OBSERVE = (1 << 6),
82 // Subscribe for all presence notifications of a particular resource.
83 OC_REST_PRESENCE = (1 << 7)
88 * Host Mode of Operation
96 extern OCMode myStackMode;
104 OC_NA_QOS // No Quality is defined, let the stack decide
105 } OCQualityOfService;
108 * Resource Properties
110 * OC_ACTIVE - When this bit is set, the resource is initialized, otherwise the resource
111 * is 'inactive'. 'inactive' signifies that the resource has been marked for
112 * deletion or is already deleted.
113 * OC_DISCOVERABLE - When this bit is set, the resource is allowed to be discovered by clients.
114 * OC_OBSERVABLE - When this bit is set, the resource is allowed to be observed by clients.
115 * OC_SLOW - When this bit is set, the resource has been marked as 'slow'. 'slow' signifies
116 * that responses from this resource can expect delays in processing its
117 * requests from clients.
120 OC_ACTIVE = (1 << 0),
121 OC_DISCOVERABLE = (1 << 1),
122 OC_OBSERVABLE = (1 << 2),
124 } OCResourceProperty;
127 * Transport Protocol IDs
130 OC_INVALID_ID = (1 << 0),
131 OC_COAP_ID = (1 << 1)
132 } OCTransportProtocolID;
135 * Declares Stack Results & Errors
138 /* Success status code - START HERE */
140 OC_STACK_RESOURCE_CREATED,
141 OC_STACK_RESOURCE_DELETED,
142 /* Success status code - END HERE */
143 /* Error status code - START HERE */
144 OC_STACK_INVALID_URI,
145 OC_STACK_INVALID_QUERY,
147 OC_STACK_INVALID_PORT,
148 OC_STACK_INVALID_CALLBACK,
149 OC_STACK_INVALID_METHOD,
150 OC_STACK_INVALID_PARAM,
151 OC_STACK_INVALID_OBSERVE_PARAM,
155 OC_STACK_NO_RESOURCE, /* resource not found */
156 OC_STACK_RESOURCE_ERROR, /* ex: not supported method or interface */
157 OC_STACK_SLOW_RESOURCE,
158 OC_STACK_NO_OBSERVERS, /* resource has no registered observers */
159 OC_STACK_OBSERVER_NOT_FOUND,
160 OC_STACK_OBSERVER_NOT_ADDED,
161 OC_STACK_OBSERVER_NOT_REMOVED,
163 OC_STACK_PRESENCE_STOPPED,
164 OC_STACK_PRESENCE_DO_NOT_HANDLE,
166 OC_STACK_INVALID_OPTION,
167 OC_STACK_MALFORMED_RESPONSE, /* the remote reply contained malformed data */
169 /* Error status code - END HERE */
173 * Handle to an @ref OCDoResource invocation.
175 typedef void * OCDoHandle;
178 * Handle to an OCResource object owned by the OCStack.
180 typedef void * OCResourceHandle;
183 * Unique identifier for each observation request. Used when observations are
184 * registered or deregistering. Used by entity handler to signal specific
185 * observers to be notified of resource changes.
186 * There can be maximum of 256 observations per server.
188 typedef uint8_t OCObservationId;
191 * Action associated with observation
194 OC_OBSERVE_REGISTER = 0,
195 OC_OBSERVE_DEREGISTER = 1,
196 OC_OBSERVE_NO_OPTION = 2
200 // Action associated with observation request
201 OCObserveAction action;
202 // Identifier for observation being registered/deregistered
203 OCObservationId obsId;
206 // following structure will be used to define the vendor specific header options to be included
207 // in communication packets
209 typedef struct OCHeaderOption {
210 // The protocol ID this option applies to
211 OCTransportProtocolID protocolID;
212 // The header option ID which will be added to communication packets
215 uint16_t optionLength;
216 // pointer to its data
217 uint8_t optionData[MAX_HEADER_OPTION_DATA_LENGTH];
221 * Incoming requests handled by the server. Requests are passed in as a parameter to the @ref OCEntityHandler callback API.
222 * @brief The @ref OCEntityHandler callback API must be implemented in the application in order to receive these requests.
225 // Associated resource
226 OCResourceHandle resource;
227 // resource query send by client
228 unsigned char * query;
229 // the REST method retrieved from received request PDU
231 // reqJSON is retrieved from the payload of the received request PDU
232 unsigned const char * reqJSONPayload;
233 // resJSON is allocated in the stack and will be used by entity handler to fill in its response
234 unsigned char * resJSONPayload;
235 // Length of maximum allowed response
236 uint16_t resJSONPayloadLen;
237 // Information associated with observation - valid only when OCEntityHandler
238 // flag includes OC_OBSERVE_FLAG
239 OCObservationInfo *obsInfo;
240 // An array of the received vendor specific header options
241 uint8_t numRcvdVendorSpecificHeaderOptions;
242 OCHeaderOption rcvdVendorSpecificHeaderOptions[MAX_HEADER_OPTIONS];
243 // An array of the vendor specific header options the entity handler wishes to use in response
244 uint8_t numSendVendorSpecificHeaderOptions;
245 OCHeaderOption sendVendorSpecificHeaderOptions[MAX_HEADER_OPTIONS];
246 // URI of new resource that entity handler might create
247 unsigned char *newResourceUri;
249 }OCEntityHandlerRequest;
252 * Response from queries to remote servers. Queries are made by calling the @ref OCDoResource API.
255 // the is the result of our stack, OCStackResult should contain coap/other error codes;
256 OCStackResult result;
257 // Address of remote server
259 // If associated with observe, this will represent the sequence of notifications from server.
260 uint32_t sequenceNumber;
261 // resJSONPayload is retrieved from the payload of the received request PDU
262 unsigned const char * resJSONPayload;
263 // An array of the received vendor specific header options
264 uint8_t numRcvdVendorSpecificHeaderOptions;
265 OCHeaderOption rcvdVendorSpecificHeaderOptions[MAX_HEADER_OPTIONS];
269 OC_INIT_FLAG = (1 << 0),
270 OC_REQUEST_FLAG = (1 << 1),
271 OC_OBSERVE_FLAG = (1 << 2)
272 } OCEntityHandlerFlag; //entity_handler_flag_t ;
274 // possible returned values from client application
276 OC_STACK_DELETE_TRANSACTION = 0,
277 OC_STACK_KEEP_TRANSACTION
278 } OCStackApplicationResult;
280 //-----------------------------------------------------------------------------
281 // Callback function definitions
282 //-----------------------------------------------------------------------------
285 * Client applications implement this callback to consume responses received from Servers.
287 typedef OCStackApplicationResult (* OCClientResponseHandler)(void *context, OCDoHandle handle,
288 OCClientResponse * clientResponse);
291 * Client applications using a context pointer implement this callback to delete the
292 * context upon removal of the callback/context pointer from the internal callback-list
294 typedef void (* OCClientContextDeleter)(void *context);
297 * This info is passed from application to OC Stack when initiating a request to Server
301 OCClientResponseHandler cb;
302 OCClientContextDeleter cd;
306 * Possible returned values from entity handler
311 OC_EH_RESOURCE_CREATED,
312 OC_EH_RESOURCE_DELETED,
314 } OCEntityHandlerResult;
317 * Application server implementations must implement this callback to consume requests OTA.
318 * Entity handler callback needs to fill the resPayload of the entityHandlerRequest.
320 typedef OCEntityHandlerResult (*OCEntityHandler)
321 (OCEntityHandlerFlag flag, OCEntityHandlerRequest * entityHandlerRequest);
324 * Device Entity handler need to use this call back instead of OCEntityHandler
326 typedef OCEntityHandlerResult (*OCDeviceEntityHandler)
327 (OCEntityHandlerFlag flag, OCEntityHandlerRequest * entityHandlerRequest, char* uri);
329 //-----------------------------------------------------------------------------
330 // Function prototypes
331 //-----------------------------------------------------------------------------
334 * Initialize the OC Stack. Must be called prior to starting the stack.
337 * IP Address of host device
339 * Port of host device
341 * Host device is client, server, or client-server
344 * OC_STACK_OK - no errors
345 * OC_STACK_ERROR - stack init error
347 OCStackResult OCInit(const char *ipAddr, uint16_t port, OCMode mode);
350 * Stop the OC stack. Use for a controlled shutdown.
352 * Note: OCStop() performs operations similar to OCStopPresence(), as well as OCDeleteResource() on
353 * all resources this server is hosting. OCDeleteResource() performs operations similar to
354 * OCNotifyAllObservers() to notify all client observers that the respective resource is being
358 * OC_STACK_OK - no errors
359 * OC_STACK_ERROR - stack not initialized
361 OCStackResult OCStop();
364 * Called in main loop of OC client or server. Allows low-level processing of
368 * OC_STACK_OK - no errors
369 * OC_STACK_ERROR - stack process error
371 OCStackResult OCProcess();
374 * Discover or Perform requests on a specified resource (specified by that Resource's respective URI).
376 * @param handle - @ref OCDoHandle to refer to the request sent out on behalf of calling this API.
377 * @param method - @ref OCMethod to perform on the resource
378 * @param requiredUri - URI of the resource to interact with
379 * @param referenceUri - URI of the reference resource
380 * @param request - JSON encoded request
381 * @param qos - quality of service
382 * @param clientApplicationCB- asynchronous callback function that is invoked
383 * by the stack when discovery or resource interaction is complete
384 * @param options - The address of an array containing the vendor specific
385 * header options to be sent with the request
386 * @param numOptions - Number of header options to be included
389 * OC_STACK_OK - no errors
390 * OC_STACK_INVALID_CALLBACK - invalid callback function pointer
391 * OC_STACK_INVALID_METHOD - invalid resource method
392 * OC_STACK_INVALID_URI - invalid required or reference URI
394 OCStackResult OCDoResource(OCDoHandle *handle, OCMethod method, const char *requiredUri, const char *referenceUri,
395 const char *request, OCQualityOfService qos, OCCallbackData *cbData, OCHeaderOption * options,
399 * Cancel a request associated with a specific @ref OCDoResource invocation.
401 * @param handle - Used to identify a specific OCDoResource invocation.
402 * @param qos - used to specify Quality of Service (read below for more info)
403 * @param options- used to specify vendor specific header options when sending
404 * explicit observe cancellation
405 * @param numOptions- Number of header options to be included
408 * OC_STACK_OK - No errors; Success
409 * OC_STACK_INVALID_PARAM - The handle provided is invalid.
411 OCStackResult OCCancel(OCDoHandle handle, OCQualityOfService qos, OCHeaderOption * options,
416 * When operating in @ref OCServer or @ref OCClientServer mode, this API will start sending out
417 * presence notifications to clients via multicast. Once this API has been called with a success,
418 * clients may query for this server's presence and this server's stack will respond via multicast.
420 * Server can call this function when it comes online for the first time, or when it comes back
421 * online from offline mode, or when it re enters network.
423 * @param ttl - Time To Live in seconds
424 * Note: If ttl is '0', then the default stack value will be used (60 Seconds).
427 * OC_STACK_OK - No errors; Success
429 OCStackResult OCStartPresence(const uint32_t ttl);
432 * When operating in @ref OCServer or @ref OCClientServer mode, this API will stop sending out
433 * presence notifications to clients via multicast. Once this API has been called with a success,
434 * this server's stack will not respond to clients querying for this server's presence.
436 * Server can call this function when it is terminating, going offline, or when going
440 * OC_STACK_OK - No errors; Success
443 OCStackResult OCStopPresence();
448 * Set default device entity handler
450 * @param entityHandler - entity handler function that is called by ocstack to handle requests for
451 * any undefined resources or default actions.
452 * if NULL is passed it removes the device default entity handler.
455 * OC_STACK_OK - no errors
456 * OC_STACK_ERROR - stack process error
458 OCStackResult OCSetDefaultDeviceEntityHandler(OCDeviceEntityHandler entityHandler);
463 * @param handle - pointer to handle to newly created resource. Set by ocstack. Used to refer to resource
464 * @param resourceTypeName - name of resource type. Example: "core.led"
465 * @param resourceInterfaceName - name of resource interface. Example: "core.rw"
466 * @param uri - URI of the resource. Example: "/a/led"
467 * @param entityHandler - entity handler function that is called by ocstack to handle requests, etc
468 * NULL for default entity handler
469 * @param resourceProperties - properties supported by resource. Example: OC_DISCOVERABLE|OC_OBSERVABLE
472 * OC_STACK_OK - no errors
473 * OC_STACK_ERROR - stack process error
475 OCStackResult OCCreateResource(OCResourceHandle *handle,
476 const char *resourceTypeName,
477 const char *resourceInterfaceName,
479 OCEntityHandler entityHandler,
480 uint8_t resourceProperties);
483 * Create a resource. with host ip address for remote resource
485 * @param handle - pointer to handle to newly created resource. Set by ocstack.
486 * Used to refer to resource
487 * @param resourceTypeName - name of resource type. Example: "core.led"
488 * @param resourceInterfaceName - name of resource interface. Example: "core.rw"
489 * @param host - HOST address of the remote resource. Example: "coap://xxx.xxx.xxx.xxx:xxxxx"
490 * @param uri - URI of the resource. Example: "/a/led"
491 * @param entityHandler - entity handler function that is called by ocstack to handle requests, etc
492 * NULL for default entity handler
493 * @param resourceProperties - properties supported by resource.
494 * Example: OC_DISCOVERABLE|OC_OBSERVABLE
497 * OC_STACK_OK - no errors
498 * OC_STACK_ERROR - stack process error
500 OCStackResult OCCreateResourceWithHost(OCResourceHandle *handle,
501 const char *resourceTypeName,
502 const char *resourceInterfaceName,
505 OCEntityHandler entityHandler,
506 uint8_t resourceProperties);
509 * Add a resource to a collection resource.
511 * @param collectionHandle - handle to the collection resource
512 * @param resourceHandle - handle to resource to be added to the collection resource
515 * OC_STACK_OK - no errors
516 * OC_STACK_ERROR - stack process error
517 * OC_STACK_INVALID_PARAM - invalid collectionhandle
519 OCStackResult OCBindResource(OCResourceHandle collectionHandle, OCResourceHandle resourceHandle);
522 * Remove a resource from a collection resource.
524 * @param collectionHandle - handle to the collection resource
525 * @param resourceHandle - handle to resource to be removed from the collection resource
528 * OC_STACK_OK - no errors
529 * OC_STACK_ERROR - stack process error
530 * OC_STACK_INVALID_PARAM - invalid collectionhandle
532 OCStackResult OCUnBindResource(OCResourceHandle collectionHandle, OCResourceHandle resourceHandle);
535 * Bind a resourcetype to a resource.
537 * @param handle - handle to the resource
538 * @param resourceTypeName - name of resource type. Example: "core.led"
541 * OC_STACK_OK - no errors
542 * OC_STACK_ERROR - stack process error
544 OCStackResult OCBindResourceTypeToResource(OCResourceHandle handle,
545 const char *resourceTypeName);
547 * Bind a resource interface to a resource.
549 * @param handle - handle to the resource
550 * @param resourceInterfaceName - name of resource interface. Example: "core.rw"
553 * OC_STACK_OK - no errors
554 * OC_STACK_ERROR - stack process error
556 OCStackResult OCBindResourceInterfaceToResource(OCResourceHandle handle,
557 const char *resourceInterfaceName);
560 * Bind an entity handler to the resource.
562 * @param handle - handle to the resource that the contained resource is to be bound
563 * @param entityHandler - entity handler function that is called by ocstack to handle requests, etc
565 * OC_STACK_OK - no errors
566 * OC_STACK_ERROR - stack process error
568 OCStackResult OCBindResourceHandler(OCResourceHandle handle, OCEntityHandler entityHandler);
571 * Get the number of resources that have been created in the stack.
573 * @param numResources - pointer to count variable
576 * OC_STACK_OK - no errors
577 * OC_STACK_ERROR - stack process error
580 OCStackResult OCGetNumberOfResources(uint8_t *numResources);
583 * Get a resource handle by index.
585 * @param index - index of resource, 0 to Count - 1
588 * Resource handle - if found
589 * NULL - if not found
591 OCResourceHandle OCGetResourceHandle(uint8_t index);
594 * Delete resource specified by handle. Deletes resource and all resourcetype and resourceinterface
597 * Note: OCDeleteResource() performs operations similar to OCNotifyAllObservers() to notify all
598 * client observers that "this" resource is being deleted.
600 * @param handle - handle of resource to be deleted
603 * OC_STACK_OK - no errors
604 * OC_STACK_ERROR - stack process error
606 OCStackResult OCDeleteResource(OCResourceHandle handle);
609 * Get the URI of the resource specified by handle.
611 * @param handle - handle of resource
613 * URI string - if resource found
614 * NULL - resource not found
616 const char *OCGetResourceUri(OCResourceHandle handle);
619 * Get the properties of the resource specified by handle.
620 * NOTE: that after a resource is created, the OC_ACTIVE property is set
621 * for the resource by the stack.
623 * @param handle - handle of resource
625 * property bitmap - if resource found
626 * NULL - resource not found
628 uint8_t OCGetResourceProperties(OCResourceHandle handle);
631 * Get the number of resource types of the resource.
633 * @param handle - handle of resource
634 * @param numResourceTypes - pointer to count variable
637 * OC_STACK_OK - no errors
638 * OC_STACK_ERROR - stack process error
640 OCStackResult OCGetNumberOfResourceTypes(OCResourceHandle handle, uint8_t *numResourceTypes);
643 * Get name of resource type of the resource.
645 * @param handle - handle of resource
646 * @param index - index of resource, 0 to Count - 1
649 * resource type name - if resource found
650 * NULL - resource not found
652 const char *OCGetResourceTypeName(OCResourceHandle handle, uint8_t index);
655 * Get the number of resource interfaces of the resource.
657 * @param handle - handle of resource
658 * @param numResources - pointer to count variable
661 * OC_STACK_OK - no errors
662 * OC_STACK_ERROR - stack process error
665 OCStackResult OCGetNumberOfResourceInterfaces(OCResourceHandle handle, uint8_t *numResourceInterfaces);
668 * Get name of resource interface of the resource.
670 * @param handle - handle of resource
671 * @param index - index of resource, 0 to Count - 1
674 * resource interface name - if resource found
675 * NULL - resource not found
677 const char *OCGetResourceInterfaceName(OCResourceHandle handle, uint8_t index);
680 * Get methods of resource interface of the resource.
682 * @param handle - handle of resource
683 * @param index - index of resource, 0 to Count - 1
686 * allowed methods - if resource found
687 * NULL - resource not found
689 uint8_t OCGetResourceInterfaceAllowedMethods(OCResourceHandle handle, uint8_t index);
692 * Get resource handle from the collection resource by index.
694 * @param collectionHandle - handle of collection resource
695 * @param index - index of contained resource, 0 to Count - 1
698 * handle to contained resource - if resource found
699 * NULL - resource not found
701 OCResourceHandle OCGetResourceHandleFromCollection(OCResourceHandle collectionHandle, uint8_t index);
704 * Get the entity handler for a resource.
706 * @param handle - handle of resource
709 * entity handler - if resource found
710 * NULL - resource not found
712 OCEntityHandler OCGetResourceHandler(OCResourceHandle handle);
715 * Notify all registered observers that the resource representation has
716 * changed. If observation includes a query the client is notified only
717 * if the query is valid after the resource representation has changed.
719 * @param handle - handle of resource
722 * OC_STACK_OK - no errors
723 * OC_STACK_NO_RESOURCE - invalid resource handle
724 * OC_STACK_NO_OBSERVERS - no more observers intrested in resource
726 OCStackResult OCNotifyAllObservers(OCResourceHandle handle, OCQualityOfService qos);
729 * Notify specific observers with updated value of representation.
730 * Before this API is invoked by entity handler it has finished processing
731 * queries for the associated observers.
733 * @param handle - handle of resource
734 * @param obsIdList - list of observation ids that need to be notified
735 * @param numberOfIds - number of observation ids included in obsIdList
736 * @param notificationJSONPayload - JSON encoded payload to send in notification
737 * NOTE: The memory for obsIdList and notificationJSONPayload is managed by the
738 * entity invoking the API. The maximum size of the notification is 1015 bytes
739 * for non-Arduino platforms. For Arduino the maximum size is 247 bytes.
742 * OC_STACK_OK - no errors
743 * OC_STACK_NO_RESOURCE - invalid resource handle
746 OCNotifyListOfObservers (OCResourceHandle handle,
747 OCObservationId *obsIdList,
749 unsigned char *notificationJSONPayload,
750 OCQualityOfService qos);
754 #endif // __cplusplus
756 #endif /* OCSTACK_H_ */