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"
41 #define USE_RANDOM_PORT (0)
43 #define OC_DEFAULT_PRESENCE_TTL (60)
44 #define OC_PRESENCE_URI "/oc/presence"
45 extern uint8_t PresenceTimeOutSize; // length of PresenceTimeOut - 1
46 extern uint32_t PresenceTimeOut[];
48 //-----------------------------------------------------------------------------
50 //-----------------------------------------------------------------------------
53 * OC Virtual resources supported by every OC device
56 OC_WELL_KNOWN_URI= 0, // "/oc/core"
57 OC_DEVICE_URI, // "/oc/core/d"
58 OC_RESOURCE_TYPES_URI, // "/oc/core/d/type"
60 OC_PRESENCE, // "/oc/presence"
62 OC_MAX_VIRTUAL_RESOURCES // Max items in the list
66 * Standard RESTful HTTP Methods
70 OC_REST_GET = (1 << 0), // Read
71 OC_REST_PUT = (1 << 1), // Write
72 OC_REST_POST = (1 << 2), // Update
73 OC_REST_DELETE = (1 << 3), // Delete
74 // Register observe request for most up date notifications ONLY.
75 OC_REST_OBSERVE = (1 << 4),
76 // Register observe request for all notifications, including stale notifications.
77 OC_REST_OBSERVE_ALL = (1 << 5),
78 // Deregister observation, intended for internal use
79 OC_REST_CANCEL_OBSERVE = (1 << 6),
81 // Subscribe for all presence notifications of a particular resource.
82 OC_REST_PRESENCE = (1 << 7)
87 * Host Mode of Operation
95 extern OCMode myStackMode;
103 OC_NA_QOS // No Quality is defined, let the stack decide
104 } OCQualityOfService;
107 * Resource Properties
109 * OC_ACTIVE - When this bit is set, the resource is initialized, otherwise the resource
110 * is 'inactive'. 'inactive' signifies that the resource has been marked for
111 * deletion or is already deleted.
112 * OC_DISCOVERABLE - When this bit is set, the resource is allowed to be discovered by clients.
113 * OC_OBSERVABLE - When this bit is set, the resource is allowed to be observed by clients.
114 * OC_SLOW - When this bit is set, the resource has been marked as 'slow'. 'slow' signifies
115 * that responses from this resource can expect delays in processing its
116 * requests from clients.
117 * OC_SECURE - When this bit is set, the resource is a secure resource.
120 OC_ACTIVE = (1 << 0),
121 OC_DISCOVERABLE = (1 << 1),
122 OC_OBSERVABLE = (1 << 2),
125 } OCResourceProperty;
128 * Transport Protocol IDs
131 OC_INVALID_ID = (1 << 0),
132 OC_COAP_ID = (1 << 1)
133 } OCTransportProtocolID;
136 * Declares Stack Results & Errors
139 /* Success status code - START HERE */
141 OC_STACK_RESOURCE_CREATED,
142 OC_STACK_RESOURCE_DELETED,
143 /* Success status code - END HERE */
144 /* Error status code - START HERE */
145 OC_STACK_INVALID_URI,
146 OC_STACK_INVALID_QUERY,
148 OC_STACK_INVALID_PORT,
149 OC_STACK_INVALID_CALLBACK,
150 OC_STACK_INVALID_METHOD,
151 OC_STACK_INVALID_PARAM,
152 OC_STACK_INVALID_OBSERVE_PARAM,
156 OC_STACK_NO_RESOURCE, /* resource not found */
157 OC_STACK_RESOURCE_ERROR, /* ex: not supported method or interface */
158 OC_STACK_SLOW_RESOURCE,
159 OC_STACK_NO_OBSERVERS, /* resource has no registered observers */
160 OC_STACK_OBSERVER_NOT_FOUND,
161 OC_STACK_OBSERVER_NOT_ADDED,
162 OC_STACK_OBSERVER_NOT_REMOVED,
164 OC_STACK_PRESENCE_STOPPED,
165 OC_STACK_PRESENCE_DO_NOT_HANDLE,
167 OC_STACK_INVALID_OPTION,
168 OC_STACK_MALFORMED_RESPONSE, /* the remote reply contained malformed data */
170 /* Error status code - END HERE */
174 * Handle to an @ref OCDoResource invocation.
176 typedef void * OCDoHandle;
179 * Handle to an OCResource object owned by the OCStack.
181 typedef void * OCResourceHandle;
184 * Unique identifier for each observation request. Used when observations are
185 * registered or deregistering. Used by entity handler to signal specific
186 * observers to be notified of resource changes.
187 * There can be maximum of 256 observations per server.
189 typedef uint8_t OCObservationId;
192 * Action associated with observation
195 OC_OBSERVE_REGISTER = 0,
196 OC_OBSERVE_DEREGISTER = 1,
197 OC_OBSERVE_NO_OPTION = 2
201 // Action associated with observation request
202 OCObserveAction action;
203 // Identifier for observation being registered/deregistered
204 OCObservationId obsId;
207 // following structure will be used to define the vendor specific header options to be included
208 // in communication packets
210 typedef struct OCHeaderOption {
211 // The protocol ID this option applies to
212 OCTransportProtocolID protocolID;
213 // The header option ID which will be added to communication packets
216 uint16_t optionLength;
217 // pointer to its data
218 uint8_t optionData[MAX_HEADER_OPTION_DATA_LENGTH];
222 * Incoming requests handled by the server. Requests are passed in as a parameter to the @ref OCEntityHandler callback API.
223 * @brief The @ref OCEntityHandler callback API must be implemented in the application in order to receive these requests.
226 // Associated resource
227 OCResourceHandle resource;
228 // resource query send by client
229 unsigned char * query;
230 // the REST method retrieved from received request PDU
232 // reqJSON is retrieved from the payload of the received request PDU
233 unsigned const char * reqJSONPayload;
234 // resJSON is allocated in the stack and will be used by entity handler to fill in its response
235 unsigned char * resJSONPayload;
236 // Length of maximum allowed response
237 uint16_t resJSONPayloadLen;
238 // Information associated with observation - valid only when OCEntityHandler
239 // flag includes OC_OBSERVE_FLAG
240 OCObservationInfo *obsInfo;
241 // An array of the received vendor specific header options
242 uint8_t numRcvdVendorSpecificHeaderOptions;
243 OCHeaderOption rcvdVendorSpecificHeaderOptions[MAX_HEADER_OPTIONS];
244 // An array of the vendor specific header options the entity handler wishes to use in response
245 uint8_t numSendVendorSpecificHeaderOptions;
246 OCHeaderOption sendVendorSpecificHeaderOptions[MAX_HEADER_OPTIONS];
247 // URI of new resource that entity handler might create
248 unsigned char *newResourceUri;
250 }OCEntityHandlerRequest;
253 * Response from queries to remote servers. Queries are made by calling the @ref OCDoResource API.
256 // the is the result of our stack, OCStackResult should contain coap/other error codes;
257 OCStackResult result;
258 // Address of remote server
260 // If associated with observe, this will represent the sequence of notifications from server.
261 uint32_t sequenceNumber;
262 // resJSONPayload is retrieved from the payload of the received request PDU
263 unsigned const char * resJSONPayload;
264 // An array of the received vendor specific header options
265 uint8_t numRcvdVendorSpecificHeaderOptions;
266 OCHeaderOption rcvdVendorSpecificHeaderOptions[MAX_HEADER_OPTIONS];
270 OC_INIT_FLAG = (1 << 0),
271 OC_REQUEST_FLAG = (1 << 1),
272 OC_OBSERVE_FLAG = (1 << 2)
273 } OCEntityHandlerFlag; //entity_handler_flag_t ;
275 // possible returned values from client application
277 OC_STACK_DELETE_TRANSACTION = 0,
278 OC_STACK_KEEP_TRANSACTION
279 } OCStackApplicationResult;
281 //-----------------------------------------------------------------------------
282 // Callback function definitions
283 //-----------------------------------------------------------------------------
286 * Client applications implement this callback to consume responses received from Servers.
288 typedef OCStackApplicationResult (* OCClientResponseHandler)(void *context, OCDoHandle handle,
289 OCClientResponse * clientResponse);
292 * Client applications using a context pointer implement this callback to delete the
293 * context upon removal of the callback/context pointer from the internal callback-list
295 typedef void (* OCClientContextDeleter)(void *context);
298 * This info is passed from application to OC Stack when initiating a request to Server
302 OCClientResponseHandler cb;
303 OCClientContextDeleter cd;
307 * Possible returned values from entity handler
312 OC_EH_RESOURCE_CREATED,
313 OC_EH_RESOURCE_DELETED,
315 } OCEntityHandlerResult;
318 * Application server implementations must implement this callback to consume requests OTA.
319 * Entity handler callback needs to fill the resPayload of the entityHandlerRequest.
321 typedef OCEntityHandlerResult (*OCEntityHandler)
322 (OCEntityHandlerFlag flag, OCEntityHandlerRequest * entityHandlerRequest);
325 * Device Entity handler need to use this call back instead of OCEntityHandler
327 typedef OCEntityHandlerResult (*OCDeviceEntityHandler)
328 (OCEntityHandlerFlag flag, OCEntityHandlerRequest * entityHandlerRequest, char* uri);
330 //-----------------------------------------------------------------------------
331 // Function prototypes
332 //-----------------------------------------------------------------------------
335 * Initialize the OC Stack. Must be called prior to starting the stack.
338 * IP Address of host device
340 * Port of host device
342 * Host device is client, server, or client-server
345 * OC_STACK_OK - no errors
346 * OC_STACK_ERROR - stack init error
348 OCStackResult OCInit(const char *ipAddr, uint16_t port, OCMode mode);
351 * Stop the OC stack. Use for a controlled shutdown.
353 * Note: OCStop() performs operations similar to OCStopPresence(), as well as OCDeleteResource() on
354 * all resources this server is hosting. OCDeleteResource() performs operations similar to
355 * OCNotifyAllObservers() to notify all client observers that the respective resource is being
359 * OC_STACK_OK - no errors
360 * OC_STACK_ERROR - stack not initialized
362 OCStackResult OCStop();
365 * Called in main loop of OC client or server. Allows low-level processing of
369 * OC_STACK_OK - no errors
370 * OC_STACK_ERROR - stack process error
372 OCStackResult OCProcess();
375 * Discover or Perform requests on a specified resource (specified by that Resource's respective URI).
377 * @param handle - @ref OCDoHandle to refer to the request sent out on behalf of calling this API.
378 * @param method - @ref OCMethod to perform on the resource
379 * @param requiredUri - URI of the resource to interact with
380 * @param referenceUri - URI of the reference resource
381 * @param request - JSON encoded request
382 * @param qos - quality of service
383 * @param clientApplicationCB- asynchronous callback function that is invoked
384 * by the stack when discovery or resource interaction is complete
385 * @param options - The address of an array containing the vendor specific
386 * header options to be sent with the request
387 * @param numOptions - Number of header options to be included
390 * OC_STACK_OK - no errors
391 * OC_STACK_INVALID_CALLBACK - invalid callback function pointer
392 * OC_STACK_INVALID_METHOD - invalid resource method
393 * OC_STACK_INVALID_URI - invalid required or reference URI
395 OCStackResult OCDoResource(OCDoHandle *handle, OCMethod method, const char *requiredUri, const char *referenceUri,
396 const char *request, OCQualityOfService qos, OCCallbackData *cbData, OCHeaderOption * options,
400 * Cancel a request associated with a specific @ref OCDoResource invocation.
402 * @param handle - Used to identify a specific OCDoResource invocation.
403 * @param qos - used to specify Quality of Service (read below for more info)
404 * @param options- used to specify vendor specific header options when sending
405 * explicit observe cancellation
406 * @param numOptions- Number of header options to be included
409 * OC_STACK_OK - No errors; Success
410 * OC_STACK_INVALID_PARAM - The handle provided is invalid.
412 OCStackResult OCCancel(OCDoHandle handle, OCQualityOfService qos, OCHeaderOption * options,
417 * When operating in @ref OCServer or @ref OCClientServer mode, this API will start sending out
418 * presence notifications to clients via multicast. Once this API has been called with a success,
419 * clients may query for this server's presence and this server's stack will respond via multicast.
421 * Server can call this function when it comes online for the first time, or when it comes back
422 * online from offline mode, or when it re enters network.
424 * @param ttl - Time To Live in seconds
425 * Note: If ttl is '0', then the default stack value will be used (60 Seconds).
428 * OC_STACK_OK - No errors; Success
430 OCStackResult OCStartPresence(const uint32_t ttl);
433 * When operating in @ref OCServer or @ref OCClientServer mode, this API will stop sending out
434 * presence notifications to clients via multicast. Once this API has been called with a success,
435 * this server's stack will not respond to clients querying for this server's presence.
437 * Server can call this function when it is terminating, going offline, or when going
441 * OC_STACK_OK - No errors; Success
444 OCStackResult OCStopPresence();
449 * Set default device entity handler
451 * @param entityHandler - entity handler function that is called by ocstack to handle requests for
452 * any undefined resources or default actions.
453 * if NULL is passed it removes the device default entity handler.
456 * OC_STACK_OK - no errors
457 * OC_STACK_ERROR - stack process error
459 OCStackResult OCSetDefaultDeviceEntityHandler(OCDeviceEntityHandler entityHandler);
464 * @param handle - pointer to handle to newly created resource. Set by ocstack. Used to refer to resource
465 * @param resourceTypeName - name of resource type. Example: "core.led"
466 * @param resourceInterfaceName - name of resource interface. Example: "core.rw"
467 * @param uri - URI of the resource. Example: "/a/led"
468 * @param entityHandler - entity handler function that is called by ocstack to handle requests, etc
469 * NULL for default entity handler
470 * @param resourceProperties - properties supported by resource. Example: OC_DISCOVERABLE|OC_OBSERVABLE
473 * OC_STACK_OK - no errors
474 * OC_STACK_ERROR - stack process error
476 OCStackResult OCCreateResource(OCResourceHandle *handle,
477 const char *resourceTypeName,
478 const char *resourceInterfaceName,
480 OCEntityHandler entityHandler,
481 uint8_t resourceProperties);
484 * Add a resource to a collection resource.
486 * @param collectionHandle - handle to the collection resource
487 * @param resourceHandle - handle to resource to be added to the collection resource
490 * OC_STACK_OK - no errors
491 * OC_STACK_ERROR - stack process error
492 * OC_STACK_INVALID_PARAM - invalid collectionhandle
494 OCStackResult OCBindResource(OCResourceHandle collectionHandle, OCResourceHandle resourceHandle);
497 * Remove a resource from a collection resource.
499 * @param collectionHandle - handle to the collection resource
500 * @param resourceHandle - handle to resource to be removed from the collection resource
503 * OC_STACK_OK - no errors
504 * OC_STACK_ERROR - stack process error
505 * OC_STACK_INVALID_PARAM - invalid collectionhandle
507 OCStackResult OCUnBindResource(OCResourceHandle collectionHandle, OCResourceHandle resourceHandle);
510 * Bind a resourcetype to a resource.
512 * @param handle - handle to the resource
513 * @param resourceTypeName - name of resource type. Example: "core.led"
516 * OC_STACK_OK - no errors
517 * OC_STACK_ERROR - stack process error
519 OCStackResult OCBindResourceTypeToResource(OCResourceHandle handle,
520 const char *resourceTypeName);
522 * Bind a resource interface to a resource.
524 * @param handle - handle to the resource
525 * @param resourceInterfaceName - name of resource interface. Example: "core.rw"
528 * OC_STACK_OK - no errors
529 * OC_STACK_ERROR - stack process error
531 OCStackResult OCBindResourceInterfaceToResource(OCResourceHandle handle,
532 const char *resourceInterfaceName);
535 * Bind an entity handler to the resource.
537 * @param handle - handle to the resource that the contained resource is to be bound
538 * @param entityHandler - entity handler function that is called by ocstack to handle requests, etc
540 * OC_STACK_OK - no errors
541 * OC_STACK_ERROR - stack process error
543 OCStackResult OCBindResourceHandler(OCResourceHandle handle, OCEntityHandler entityHandler);
546 * Get the number of resources that have been created in the stack.
548 * @param numResources - pointer to count variable
551 * OC_STACK_OK - no errors
552 * OC_STACK_ERROR - stack process error
555 OCStackResult OCGetNumberOfResources(uint8_t *numResources);
558 * Get a resource handle by index.
560 * @param index - index of resource, 0 to Count - 1
563 * Resource handle - if found
564 * NULL - if not found
566 OCResourceHandle OCGetResourceHandle(uint8_t index);
569 * Delete resource specified by handle. Deletes resource and all resourcetype and resourceinterface
572 * Note: OCDeleteResource() performs operations similar to OCNotifyAllObservers() to notify all
573 * client observers that "this" resource is being deleted.
575 * @param handle - handle of resource to be deleted
578 * OC_STACK_OK - no errors
579 * OC_STACK_ERROR - stack process error
581 OCStackResult OCDeleteResource(OCResourceHandle handle);
584 * Get the URI of the resource specified by handle.
586 * @param handle - handle of resource
588 * URI string - if resource found
589 * NULL - resource not found
591 const char *OCGetResourceUri(OCResourceHandle handle);
594 * Get the properties of the resource specified by handle.
595 * NOTE: that after a resource is created, the OC_ACTIVE property is set
596 * for the resource by the stack.
598 * @param handle - handle of resource
600 * property bitmap - if resource found
601 * NULL - resource not found
603 uint8_t OCGetResourceProperties(OCResourceHandle handle);
606 * Get the number of resource types of the resource.
608 * @param handle - handle of resource
609 * @param numResourceTypes - pointer to count variable
612 * OC_STACK_OK - no errors
613 * OC_STACK_ERROR - stack process error
615 OCStackResult OCGetNumberOfResourceTypes(OCResourceHandle handle, uint8_t *numResourceTypes);
618 * Get name of resource type of the resource.
620 * @param handle - handle of resource
621 * @param index - index of resource, 0 to Count - 1
624 * resource type name - if resource found
625 * NULL - resource not found
627 const char *OCGetResourceTypeName(OCResourceHandle handle, uint8_t index);
630 * Get the number of resource interfaces of the resource.
632 * @param handle - handle of resource
633 * @param numResources - pointer to count variable
636 * OC_STACK_OK - no errors
637 * OC_STACK_ERROR - stack process error
640 OCStackResult OCGetNumberOfResourceInterfaces(OCResourceHandle handle, uint8_t *numResourceInterfaces);
643 * Get name of resource interface of the resource.
645 * @param handle - handle of resource
646 * @param index - index of resource, 0 to Count - 1
649 * resource interface name - if resource found
650 * NULL - resource not found
652 const char *OCGetResourceInterfaceName(OCResourceHandle handle, uint8_t index);
655 * Get methods of resource interface of the resource.
657 * @param handle - handle of resource
658 * @param index - index of resource, 0 to Count - 1
661 * allowed methods - if resource found
662 * NULL - resource not found
664 uint8_t OCGetResourceInterfaceAllowedMethods(OCResourceHandle handle, uint8_t index);
667 * Get resource handle from the collection resource by index.
669 * @param collectionHandle - handle of collection resource
670 * @param index - index of contained resource, 0 to Count - 1
673 * handle to contained resource - if resource found
674 * NULL - resource not found
676 OCResourceHandle OCGetResourceHandleFromCollection(OCResourceHandle collectionHandle, uint8_t index);
679 * Get the entity handler for a resource.
681 * @param handle - handle of resource
684 * entity handler - if resource found
685 * NULL - resource not found
687 OCEntityHandler OCGetResourceHandler(OCResourceHandle handle);
690 * Notify all registered observers that the resource representation has
691 * changed. If observation includes a query the client is notified only
692 * if the query is valid after the resource representation has changed.
694 * @param handle - handle of resource
697 * OC_STACK_OK - no errors
698 * OC_STACK_NO_RESOURCE - invalid resource handle
699 * OC_STACK_NO_OBSERVERS - no more observers intrested in resource
701 OCStackResult OCNotifyAllObservers(OCResourceHandle handle, OCQualityOfService qos);
704 * Notify specific observers with updated value of representation.
705 * Before this API is invoked by entity handler it has finished processing
706 * queries for the associated observers.
708 * @param handle - handle of resource
709 * @param obsIdList - list of observation ids that need to be notified
710 * @param numberOfIds - number of observation ids included in obsIdList
711 * @param notificationJSONPayload - JSON encoded payload to send in notification
712 * NOTE: The memory for obsIdList and notificationJSONPayload is managed by the
713 * entity invoking the API. The maximum size of the notification is 1015 bytes
714 * for non-Arduino platforms. For Arduino the maximum size is 247 bytes.
717 * OC_STACK_OK - no errors
718 * OC_STACK_NO_RESOURCE - invalid resource handle
721 OCNotifyListOfObservers (OCResourceHandle handle,
722 OCObservationId *obsIdList,
724 unsigned char *notificationJSONPayload,
725 OCQualityOfService qos);
729 #endif // __cplusplus
731 #endif /* OCSTACK_H_ */