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 //-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=
23 #include "ocserverrequest.h"
24 #include "ocresourcehandler.h"
25 #include "oic_malloc.h"
26 #include "oic_string.h"
29 #include "cainterface.h"
35 #define VERIFY_NON_NULL(arg) { if (!arg) {OC_LOG(FATAL, TAG, #arg " is NULL"); goto exit;} }
37 #define TAG PCF("ocserverrequest")
39 static struct OCServerRequest * serverRequestList = NULL;
40 static struct OCServerResponse * serverResponseList = NULL;
42 //-------------------------------------------------------------------------------------------------
44 //-------------------------------------------------------------------------------------------------
47 * Add a server response to the server response list
49 * @param response initialized server response that is created by this function
50 * @param requestHandle - handle of the response
55 static OCStackResult AddServerResponse (OCServerResponse ** response, OCRequestHandle requestHandle)
57 OCServerResponse * serverResponse = NULL;
59 serverResponse = (OCServerResponse *) OICCalloc(1, sizeof(OCServerResponse));
60 VERIFY_NON_NULL(serverResponse);
62 serverResponse->payload = (char *) OICCalloc(1, MAX_RESPONSE_LENGTH);
63 VERIFY_NON_NULL(serverResponse->payload);
65 serverResponse->remainingPayloadSize = MAX_RESPONSE_LENGTH;
66 serverResponse->requestHandle = requestHandle;
68 *response = serverResponse;
69 OC_LOG(INFO, TAG, PCF("Server Response Added!!"));
70 LL_APPEND (serverResponseList, serverResponse);
76 OICFree(serverResponse);
77 serverResponse = NULL;
80 return OC_STACK_NO_MEMORY;
84 * Delete a server request from the server request list
86 * @param serverRequest - server request to delete
88 static void DeleteServerRequest(OCServerRequest * serverRequest)
92 LL_DELETE(serverRequestList, serverRequest);
93 OICFree(serverRequest->requestToken);
94 OICFree(serverRequest);
96 OC_LOG(INFO, TAG, PCF("Server Request Removed!!"));
101 * Delete a server response from the server response list
103 * @param serverResponse - server response to delete
105 static void DeleteServerResponse(OCServerResponse * serverResponse)
109 LL_DELETE(serverResponseList, serverResponse);
110 OICFree(serverResponse->payload);
111 OICFree(serverResponse);
112 OC_LOG(INFO, TAG, PCF("Server Response Removed!!"));
117 * Find a server response and delete it from the server response list
119 * @param serverResponse - server response to find and delete
121 static void FindAndDeleteServerResponse(OCServerResponse * serverResponse)
123 OCServerResponse* tmp;
126 LL_FOREACH(serverResponseList, tmp)
128 if (serverResponse == tmp)
130 DeleteServerResponse(tmp);
137 //-------------------------------------------------------------------------------------------------
139 //-------------------------------------------------------------------------------------------------
142 * Get a server request from the server request list using the specified token.
144 * @param token - token of server request
145 * @param tokenLength - length of token
150 OCServerRequest * GetServerRequestUsingToken (const CAToken_t token, uint8_t tokenLength)
154 OC_LOG(ERROR, TAG, PCF("Invalid Parameter Token"));
158 OCServerRequest * out = NULL;
159 LL_FOREACH (serverRequestList, out)
161 OC_LOG(INFO, TAG,PCF("comparing tokens"));
162 OC_LOG_BUFFER(INFO, TAG, (const uint8_t *)token, tokenLength);
163 OC_LOG_BUFFER(INFO, TAG, (const uint8_t *)out->requestToken, tokenLength);
164 if(memcmp(out->requestToken, token, tokenLength) == 0)
169 OC_LOG(ERROR, TAG, PCF("Server Request not found!!"));
174 * Get a server request from the server request list using the specified handle
176 * @param handle - handle of server request
180 OCServerRequest * GetServerRequestUsingHandle (const OCServerRequest * handle)
182 OCServerRequest * out = NULL;
183 LL_FOREACH (serverRequestList, out)
190 OC_LOG(ERROR, TAG, PCF("Server Request not found!!"));
195 * Get a server response from the server response list using the specified handle
197 * @param handle - handle of server response
202 OCServerResponse * GetServerResponseUsingHandle (const OCServerRequest * handle)
204 OCServerResponse * out = NULL;
205 LL_FOREACH (serverResponseList, out)
207 if(out->requestHandle == handle)
212 OC_LOG(ERROR, TAG, PCF("Server Response not found!!"));
217 * Add a server request to the server request list
219 * @param request - initialized server request that is created by this function
220 * @param coapID - ID of CoAP pdu
221 * @param delayedResNeeded - delayed response required 0=no 1=yes
222 * @param secured - secure endpoint 0=no 1=yes
223 * @param notificationFlag - //TODO: remove - does not appear to be used any longer
224 * @param method - RESTful method
225 * @param numRcvdVendorSpecificHeaderOptions - number of received vendor specific header options
226 * @param observationOption - value of observation option
227 * @param qos - request QOS
228 * @param query - request query
229 * @param rcvdVendorSpecificHeaderOptions - received vendor specific header options
230 * @param reqJSONPayload - request JSON payload
231 * @param requestToken - request token
232 * @param tokenLength - request token length
233 * @param resourceUrl - URL of resource
234 * @param reqTotalSize - total size of the request
235 * @param addressInfo - CA Address
236 * @param connectivityType - connection type
241 OCStackResult AddServerRequest (OCServerRequest ** request, uint16_t coapID,
242 uint8_t delayedResNeeded, uint8_t secured, uint8_t notificationFlag, OCMethod method,
243 uint8_t numRcvdVendorSpecificHeaderOptions, uint32_t observationOption,
244 OCQualityOfService qos, char * query,
245 OCHeaderOption * rcvdVendorSpecificHeaderOptions,
246 char * reqJSONPayload, CAToken_t requestToken,
248 char * resourceUrl, size_t reqTotalSize,
249 CAAddress_t *addressInfo, CATransportType_t connectivityType)
251 OCServerRequest * serverRequest = NULL;
253 //Note: OCServerRequest includes 1 byte for the JSON Payload. payloadSize is calculated
254 //as the required length of the string, so this will result in enough room for the
255 //null terminator as well.
256 serverRequest = (OCServerRequest *) OICCalloc(1, sizeof(OCServerRequest) +
257 (reqTotalSize ? reqTotalSize : 1) - 1);
258 VERIFY_NON_NULL(serverRequest);
260 serverRequest->coapID = coapID;
261 serverRequest->delayedResNeeded = delayedResNeeded;
262 serverRequest->secured = secured;
263 serverRequest->notificationFlag = notificationFlag;
265 serverRequest->method = method;
266 serverRequest->numRcvdVendorSpecificHeaderOptions = numRcvdVendorSpecificHeaderOptions;
267 serverRequest->observationOption = observationOption;
268 serverRequest->observeResult = OC_STACK_ERROR;
269 serverRequest->qos = qos;
270 serverRequest->ehResponseHandler = HandleSingleResponse;
271 serverRequest->numResponses = 1;
275 OICStrcpy(serverRequest->query, sizeof(serverRequest->query), query);
278 if(rcvdVendorSpecificHeaderOptions)
280 memcpy(serverRequest->rcvdVendorSpecificHeaderOptions, rcvdVendorSpecificHeaderOptions,
281 MAX_HEADER_OPTIONS * sizeof(OCHeaderOption));
283 if(reqJSONPayload && reqTotalSize)
285 OICStrcpy(serverRequest->reqJSONPayload, reqTotalSize, reqJSONPayload);
287 serverRequest->requestComplete = 0;
290 // If tokenLength is zero, the return value depends on the
291 // particular library implementation (it may or may not be a null pointer).
294 serverRequest->requestToken = (CAToken_t) OICMalloc(tokenLength);
295 VERIFY_NON_NULL(serverRequest->requestToken);
296 memcpy(serverRequest->requestToken, requestToken, tokenLength);
300 serverRequest->tokenLength = tokenLength;
304 OICStrcpy(serverRequest->resourceUrl, sizeof(serverRequest->resourceUrl),
310 serverRequest->addressInfo = *addressInfo;
312 serverRequest->connectivityType = connectivityType;
314 *request = serverRequest;
315 OC_LOG(INFO, TAG, PCF("Server Request Added!!"));
316 LL_APPEND (serverRequestList, serverRequest);
322 OICFree(serverRequest);
323 serverRequest = NULL;
326 return OC_STACK_NO_MEMORY;
330 * Form the OCEntityHandlerRequest struct that is passed to a resource's entity handler
332 * @param entityHandlerRequest - pointer to the OCEntityHandlerRequest struct that is created.
333 * Required to be zero-initialized before calling this function.
334 * @param request - request handle
335 * @param method - RESTful method
336 * @param resource - resource handle
337 * @param queryBuf - resource query of request
338 * @param bufReqPayload - JSON payload of request
339 * @param numVendorOptions - number of vendor options
340 * @param vendorOptions - vendor options
341 * @param observeAction - observe action flag
342 * @param observeID - observe ID
347 OCStackResult FormOCEntityHandlerRequest(
348 OCEntityHandlerRequest * entityHandlerRequest,
349 OCRequestHandle request,
351 OCResourceHandle resource,
353 char * bufReqPayload,
354 uint8_t numVendorOptions,
355 OCHeaderOption * vendorOptions,
356 OCObserveAction observeAction,
357 OCObservationId observeID)
359 if (entityHandlerRequest)
361 entityHandlerRequest->resource = (OCResourceHandle) resource;
362 entityHandlerRequest->requestHandle = request;
363 entityHandlerRequest->method = method;
364 entityHandlerRequest->query = queryBuf;
365 entityHandlerRequest->obsInfo.action = observeAction;
366 entityHandlerRequest->obsInfo.obsId = observeID;
367 entityHandlerRequest->numRcvdVendorSpecificHeaderOptions = numVendorOptions;
368 entityHandlerRequest->rcvdVendorSpecificHeaderOptions = vendorOptions;
369 entityHandlerRequest->reqJSONPayload = bufReqPayload;
374 return OC_STACK_INVALID_PARAM;
378 * Find a server request in the server request list and delete
380 * @param serverRequest - server request to find and delete
382 void FindAndDeleteServerRequest(OCServerRequest * serverRequest)
384 OCServerRequest* tmp;
387 LL_FOREACH(serverRequestList, tmp)
389 if (serverRequest == tmp)
391 DeleteServerRequest(tmp);
398 CAResponseResult_t ConvertEHResultToCAResult (OCEntityHandlerResult result)
400 CAResponseResult_t caResult = CA_BAD_REQ;
405 caResult = CA_SUCCESS;
408 caResult = CA_BAD_REQ;
410 case OC_EH_RESOURCE_CREATED:
411 caResult = CA_CREATED;
413 case OC_EH_RESOURCE_DELETED:
414 caResult = CA_DELETED;
417 caResult = CA_SUCCESS;
419 case OC_EH_FORBIDDEN:
420 caResult = CA_UNAUTHORIZED_REQ;
422 case OC_EH_RESOURCE_NOT_FOUND:
423 caResult = CA_NOT_FOUND;
426 caResult = CA_BAD_REQ;
434 * Handler function for sending a response from a single resource
436 * @param ehResponse - pointer to the response from the resource
442 OCStackResult HandleSingleResponse(OCEntityHandlerResponse * ehResponse)
444 OCStackResult result = OC_STACK_ERROR;
445 CARemoteEndpoint_t responseEndpoint = {};
446 CAResponseInfo_t responseInfo = {};
447 CAHeaderOption_t* optionsPointer = NULL;
449 OC_LOG_V(INFO, TAG, "Inside HandleSingleResponse: %s", ehResponse->payload);
451 if(!ehResponse || !ehResponse->requestHandle)
453 return OC_STACK_ERROR;
456 if(ehResponse->payloadSize >= (MAX_RESPONSE_LENGTH))// - OC_JSON_PREFIX_LEN - OC_JSON_SUFFIX_LEN))
458 OC_LOG_V(ERROR, TAG, "Response payload size was too large. Max is %hu, payload size was %hu",
459 (MAX_RESPONSE_LENGTH - OC_JSON_PREFIX_LEN - OC_JSON_SUFFIX_LEN), ehResponse->payloadSize);
460 return OC_STACK_INVALID_PARAM;
463 OCServerRequest *serverRequest = (OCServerRequest *)ehResponse->requestHandle;
466 responseEndpoint.resourceUri = (CAURI_t) serverRequest->resourceUrl;
467 responseEndpoint.addressInfo = serverRequest->addressInfo;
468 responseEndpoint.transportType = serverRequest->connectivityType;
469 responseEndpoint.isSecured = serverRequest->secured;
471 responseInfo.result = ConvertEHResultToCAResult(ehResponse->ehResult);
473 if(serverRequest->notificationFlag && serverRequest->qos == OC_HIGH_QOS)
475 responseInfo.info.type = CA_MSG_CONFIRM;
477 else if(serverRequest->notificationFlag && serverRequest->qos != OC_HIGH_QOS)
479 responseInfo.info.type = CA_MSG_NONCONFIRM;
481 else if(!serverRequest->notificationFlag && !serverRequest->slowFlag &&
482 serverRequest->qos == OC_HIGH_QOS)
484 responseInfo.info.type = CA_MSG_ACKNOWLEDGE;
486 else if(!serverRequest->notificationFlag && serverRequest->slowFlag &&
487 serverRequest->qos == OC_HIGH_QOS)
489 responseInfo.info.type = CA_MSG_CONFIRM;
491 else if(!serverRequest->notificationFlag)
493 responseInfo.info.type = CA_MSG_NONCONFIRM;
496 responseInfo.info.messageId = serverRequest->coapID;
497 responseInfo.info.token = (CAToken_t)OICMalloc(CA_MAX_TOKEN_LEN+1);
498 if (!responseInfo.info.token)
500 OC_LOG(FATAL, TAG, "Response Info Token is NULL");
504 memcpy(responseInfo.info.token, serverRequest->requestToken, serverRequest->tokenLength);
505 responseInfo.info.tokenLength = serverRequest->tokenLength;
507 if(serverRequest->observeResult == OC_STACK_OK)
509 responseInfo.info.numOptions = ehResponse->numSendVendorSpecificHeaderOptions + 1;
513 responseInfo.info.numOptions = ehResponse->numSendVendorSpecificHeaderOptions;
516 if(responseInfo.info.numOptions > 0)
518 responseInfo.info.options = (CAHeaderOption_t *)
519 OICCalloc(responseInfo.info.numOptions,
520 sizeof(CAHeaderOption_t));
522 if(!responseInfo.info.options)
524 OC_LOG(FATAL, TAG, PCF("options is NULL"));
525 OICFree(responseInfo.info.token);
526 return OC_STACK_NO_MEMORY;
529 optionsPointer = responseInfo.info.options;
531 // TODO: This exposes CoAP specific details. At some point, this should be
532 // re-factored and handled in the CA layer.
533 if(serverRequest->observeResult == OC_STACK_OK)
535 responseInfo.info.options[0].protocolID = CA_COAP_ID;
536 responseInfo.info.options[0].optionID = COAP_OPTION_OBSERVE;
537 responseInfo.info.options[0].optionLength = sizeof(uint32_t);
538 memcpy(responseInfo.info.options[0].optionData,
539 &(serverRequest->observationOption), sizeof(uint32_t));
541 // Point to the next header option before copying vender specific header options
545 if (ehResponse->numSendVendorSpecificHeaderOptions)
547 memcpy(optionsPointer, ehResponse->sendVendorSpecificHeaderOptions,
548 sizeof(OCHeaderOption) *
549 ehResponse->numSendVendorSpecificHeaderOptions);
554 responseInfo.info.options = NULL;
557 char payload[MAX_RESPONSE_LENGTH + OC_JSON_PREFIX_LEN + OC_JSON_SUFFIX_LEN + 1] = {};
559 // Put the JSON prefix and suffix around the payload
560 OICStrcpy(payload, sizeof(payload), OC_JSON_PREFIX);
561 if(ehResponse->payloadSize)
563 OICStrcatPartial(payload, sizeof(payload),
565 ehResponse->payloadSize < MAX_RESPONSE_LENGTH ?
566 ehResponse->payloadSize : MAX_RESPONSE_LENGTH);
568 OICStrcat(payload, sizeof(payload), OC_JSON_SUFFIX);
569 responseInfo.info.payload = (CAPayload_t)payload;
572 //TODO: Add other connectivity types to CAConnTypes[] when enabled
573 CATransportType_t CAConnTypes[] = {CA_IPV4};
574 const char * connTypes[] = {"ip transport"};
575 int size = sizeof(CAConnTypes)/ sizeof(CATransportType_t);
576 CATransportType_t connType = responseEndpoint.transportType;
577 CAResult_t caResult = CA_STATUS_FAILED;
578 result = OC_STACK_OK;
580 //Sending response on all n/w interfaces
581 for(int i = 0; i < size; i++ )
583 responseEndpoint.transportType = (CATransportType_t)(connType & CAConnTypes[i]);
584 if(responseEndpoint.transportType)
586 //The result is set to OC_STACK_OK only if CASendResponse succeeds in sending the
587 //response on all the n/w interfaces else it is set to OC_STACK_ERROR
588 caResult = CASendResponse(&responseEndpoint, &responseInfo);
589 if(caResult != CA_STATUS_OK)
591 OC_LOG_V(ERROR, TAG, "CASendResponse failed on %s", connTypes[i]);
592 result = CAResultToOCResult(caResult);
596 OC_LOG_V(INFO, TAG, "CASendResponse succeeded on %s", connTypes[i]);
601 CAResult_t caResult = CASendResponse(&responseEndpoint, &responseInfo);
602 if(caResult != CA_STATUS_OK)
604 OC_LOG(ERROR, TAG, PCF("CASendResponse failed"));
605 result = CAResultToOCResult(caResult);
609 result = OC_STACK_OK;
613 OICFree(responseInfo.info.token);
614 OICFree(responseInfo.info.options);
616 FindAndDeleteServerRequest(serverRequest);
621 * Handler function for sending a response from multiple resources, such as a collection.
622 * Aggregates responses from multiple resource until all responses are received then sends the
623 * concatenated response
625 * TODO: Need to add a timeout in case a (remote?) resource does not respond
627 * @param ehResponse - pointer to the response from the resource
632 OCStackResult HandleAggregateResponse(OCEntityHandlerResponse * ehResponse)
634 OCStackResult stackRet = OC_STACK_ERROR;
635 OCServerRequest * serverRequest = NULL;
636 OCServerResponse * serverResponse = NULL;
637 uint16_t bufferNeeded = 0;
639 if(!ehResponse || !ehResponse->payload)
641 OC_LOG(ERROR, TAG, PCF("HandleAggregateResponse invalid parameters"));
642 return OC_STACK_INVALID_PARAM;
645 OC_LOG_V(INFO, TAG, "Inside HandleAggregateResponse: %s", ehResponse->payload);
647 serverRequest = GetServerRequestUsingHandle((OCServerRequest *)ehResponse->requestHandle);
648 serverResponse = GetServerResponseUsingHandle((OCServerRequest *)ehResponse->requestHandle);
654 OC_LOG(INFO, TAG, PCF("This is the first response fragment"));
655 stackRet = AddServerResponse(&serverResponse, ehResponse->requestHandle);
656 if (OC_STACK_OK != stackRet)
658 OC_LOG(ERROR, TAG, PCF("Error adding server response"));
661 VERIFY_NON_NULL(serverResponse);
662 VERIFY_NON_NULL(serverResponse->payload);
665 // If there is more than 1 response, then we need to allow for a null-termination
666 // in the server response payload buffer AND the JSON response separator
667 bufferNeeded = ehResponse->payloadSize + 1;
668 if (serverRequest->numResponses > 1)
670 bufferNeeded += strlen(OC_JSON_SEPARATOR_STR);
672 if(serverResponse->remainingPayloadSize >= bufferNeeded)
674 OC_LOG(ERROR, TAG, PCF("There is room in response buffer"));
676 // allocated size of the payload is assumed, since a search of the code
677 // shows that it is OICCalloc'ed to this size in AddServerResponse above
678 OICStrcatPartial(serverResponse->payload,
681 serverResponse->remainingPayloadSize);
682 OC_LOG_V(INFO, TAG, "Current aggregated response ...%s", serverResponse->payload);
683 serverResponse->remainingPayloadSize -= strlen((char *)ehResponse->payload);
684 (serverRequest->numResponses)--;
685 if(serverRequest->numResponses == 0)
687 OC_LOG(INFO, TAG, PCF("This is the last response fragment"));
688 ehResponse->payload = serverResponse->payload;
689 ehResponse->payloadSize = strlen((char *) serverResponse->payload) + 1;
690 stackRet = HandleSingleResponse(ehResponse);
691 //Delete the request and response
692 FindAndDeleteServerRequest(serverRequest);
693 FindAndDeleteServerResponse(serverResponse);
697 OC_LOG(INFO, TAG, PCF("More response fragments to come"));
698 OICStrcatPartial(serverResponse->payload,
700 OC_JSON_SEPARATOR_STR,
701 serverResponse->remainingPayloadSize);
702 OC_LOG_V(INFO, TAG, "Current aggregated response ...%s", serverResponse->payload);
703 serverResponse->remainingPayloadSize -= strlen(OC_JSON_SEPARATOR_STR);
704 stackRet = OC_STACK_OK;
709 OC_LOG(ERROR, TAG, PCF("No room in response buffer"));
710 //Delete the request and response
711 FindAndDeleteServerRequest(serverRequest);
712 FindAndDeleteServerResponse(serverResponse);
713 stackRet = OC_STACK_NO_MEMORY;