resource/csdk/connectivity/src/camessagehandler.c

   1 /* *****************************************************************
   2  *
   3  * Copyright 2014 Samsung Electronics All Rights Reserved.
   4  *
   5  *
   6  *
   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
  10  *
  11  *      http://www.apache.org/licenses/LICENSE-2.0
  12  *
  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.
  18  *
  19  ******************************************************************/
  20
  21 #include <stdio.h>
  22 #include <stdlib.h>
  23 #include <string.h>
  24 #include <stdint.h>
  25
  26 #include "cainterface.h"
  27 #include "camessagehandler.h"
  28 #include "caremotehandler.h"
  29 #include "caprotocolmessage.h"
  30 #include "logger.h"
  31 #include "config.h" /* for coap protocol */
  32 #include "oic_malloc.h"
  33 #include "canetworkconfigurator.h"
  34 #include "caadapterutils.h"
  35 #include "cainterfacecontroller.h"
  36 #include "caretransmission.h"
  37 #include "oic_string.h"
  38
  39 #ifdef WITH_BWT
  40 #include "cablockwisetransfer.h"
  41 #endif
  42
  43 #ifndef  SINGLE_THREAD
  44 #include "uqueue.h"
  45 #include "cathreadpool.h" /* for thread pool */
  46 #include "caqueueingthread.h"
  47
  48 #define SINGLE_HANDLE
  49 #define MAX_THREAD_POOL_SIZE    20
  50
  51 // thread pool handle
  52 static ca_thread_pool_t g_threadPoolHandle = NULL;
  53
  54 // message handler main thread
  55 static CAQueueingThread_t g_sendThread;
  56 static CAQueueingThread_t g_receiveThread;
  57
  58 #else
  59 #define CA_MAX_RT_ARRAY_SIZE    3
  60 #endif  // SINGLE_THREAD
  61
  62 #define TAG "OIC_CA_MSG_HANDLE"
  63
  64 static CARetransmission_t g_retransmissionContext;
  65
  66 // handler field
  67 static CARequestCallback g_requestHandler = NULL;
  68 static CAResponseCallback g_responseHandler = NULL;
  69 static CAErrorCallback g_errorHandler = NULL;
  70 static CANetworkMonitorCallback g_nwMonitorHandler = NULL;
  71
  72 static void CAErrorHandler(const CAEndpoint_t *endpoint,
  73                            const void *data, uint32_t dataLen,
  74                            CAResult_t result);
  75
  76 static CAData_t* CAGenerateHandlerData(const CAEndpoint_t *endpoint,
  77                                        const CARemoteId_t *identity,
  78                                        const void *data, CADataType_t dataType);
  79
  80 static void CASendErrorInfo(const CAEndpoint_t *endpoint, const CAInfo_t *info,
  81                             CAResult_t result);
  82
  83 #ifdef SINGLE_THREAD
  84 static void CAProcessReceivedData(CAData_t *data);
  85 #endif
  86 static void CADestroyData(void *data, uint32_t size);
  87 static void CALogPayloadInfo(CAInfo_t *info);
  88 static bool CADropSecondMessage(CAHistory_t *history, const CAEndpoint_t *endpoint, uint16_t id,
  89                                 CAToken_t token, uint8_t tokenLength);
  90
  91 #ifdef WITH_BWT
  92 void CAAddDataToSendThread(CAData_t *data)
  93 {
  94     VERIFY_NON_NULL_VOID(data, TAG, "data");
  95
  96     // add thread
  97     CAQueueingThreadAddData(&g_sendThread, data, sizeof(CAData_t));
  98 }
  99
 100 void CAAddDataToReceiveThread(CAData_t *data)
 101 {
 102     VERIFY_NON_NULL_VOID(data, TAG, "data");
 103
 104     // add thread
 105     CAQueueingThreadAddData(&g_receiveThread, data, sizeof(CAData_t));
 106 }
 107 #endif
 108
 109 static bool CAIsSelectedNetworkAvailable()
 110 {
 111     u_arraylist_t *list = CAGetSelectedNetworkList();
 112     if (!list || u_arraylist_length(list) == 0)
 113     {
 114         OIC_LOG(ERROR, TAG, "No selected network");
 115         return false;
 116     }
 117
 118     return true;
 119 }
 120
 121 static CAData_t* CAGenerateHandlerData(const CAEndpoint_t *endpoint,
 122                                        const CARemoteId_t *identity,
 123                                        const void *data, CADataType_t dataType)
 124 {
 125     OIC_LOG(DEBUG, TAG, "CAGenerateHandlerData IN");
 126     CAInfo_t *info = NULL;
 127     CAData_t *cadata = (CAData_t *) OICCalloc(1, sizeof(CAData_t));
 128     if (!cadata)
 129     {
 130         OIC_LOG(ERROR, TAG, "memory allocation failed");
 131         return NULL;
 132     }
 133
 134     CAEndpoint_t* ep = CACloneEndpoint(endpoint);
 135     if (!ep)
 136     {
 137         OIC_LOG(ERROR, TAG, "endpoint clone failed");
 138         OICFree(cadata);
 139         return NULL;
 140     }
 141
 142     OIC_LOG_V(DEBUG, TAG, "address : %s", ep->addr);
 143
 144     if (CA_RESPONSE_DATA == dataType)
 145     {
 146         CAResponseInfo_t* resInfo = (CAResponseInfo_t*)OICCalloc(1, sizeof(CAResponseInfo_t));
 147         if (!resInfo)
 148         {
 149             OIC_LOG(ERROR, TAG, "memory allocation failed");
 150             OICFree(cadata);
 151             CAFreeEndpoint(ep);
 152             return NULL;
 153         }
 154
 155         CAResult_t result = CAGetResponseInfoFromPDU(data, resInfo, endpoint);
 156         if (CA_STATUS_OK != result)
 157         {
 158             OIC_LOG(ERROR, TAG, "CAGetResponseInfoFromPDU Failed");
 159             CAFreeEndpoint(ep);
 160             CADestroyResponseInfoInternal(resInfo);
 161             OICFree(cadata);
 162             return NULL;
 163         }
 164         cadata->responseInfo = resInfo;
 165         info = &resInfo->info;
 166         if (identity)
 167         {
 168             info->identity = *identity;
 169         }
 170         OIC_LOG(DEBUG, TAG, "Response Info :");
 171         CALogPayloadInfo(info);
 172     }
 173     else if (CA_REQUEST_DATA == dataType)
 174     {
 175         CARequestInfo_t* reqInfo = (CARequestInfo_t*)OICCalloc(1, sizeof(CARequestInfo_t));
 176         if (!reqInfo)
 177         {
 178             OIC_LOG(ERROR, TAG, "memory allocation failed");
 179             OICFree(cadata);
 180             CAFreeEndpoint(ep);
 181             return NULL;
 182         }
 183
 184         CAResult_t result = CAGetRequestInfoFromPDU(data, endpoint, reqInfo);
 185         if (CA_STATUS_OK != result)
 186         {
 187             OIC_LOG(ERROR, TAG, "CAGetRequestInfoFromPDU failed");
 188             CAFreeEndpoint(ep);
 189             CADestroyRequestInfoInternal(reqInfo);
 190             OICFree(cadata);
 191             return NULL;
 192         }
 193
 194         if (CADropSecondMessage(&caglobals.ca.requestHistory, endpoint, reqInfo->info.messageId,
 195                                 reqInfo->info.token, reqInfo->info.tokenLength))
 196         {
 197             OIC_LOG(ERROR, TAG, "Second Request with same Token, Drop it");
 198             CAFreeEndpoint(ep);
 199             CADestroyRequestInfoInternal(reqInfo);
 200             OICFree(cadata);
 201             return NULL;
 202         }
 203
 204         cadata->requestInfo = reqInfo;
 205         info = &reqInfo->info;
 206         if (identity)
 207         {
 208             info->identity = *identity;
 209         }
 210         OIC_LOG(DEBUG, TAG, "Request Info :");
 211         CALogPayloadInfo(info);
 212    }
 213     else if (CA_ERROR_DATA == dataType)
 214     {
 215         CAErrorInfo_t *errorInfo = (CAErrorInfo_t *)OICCalloc(1, sizeof (CAErrorInfo_t));
 216         if (!errorInfo)
 217         {
 218             OIC_LOG(ERROR, TAG, "Memory allocation failed!");
 219             OICFree(cadata);
 220             CAFreeEndpoint(ep);
 221             return NULL;
 222         }
 223
 224         CAResult_t result = CAGetErrorInfoFromPDU(data, endpoint, errorInfo);
 225         if (CA_STATUS_OK != result)
 226         {
 227             OIC_LOG(ERROR, TAG, "CAGetErrorInfoFromPDU failed");
 228             CAFreeEndpoint(ep);
 229             OICFree(errorInfo);
 230             OICFree(cadata);
 231             return NULL;
 232         }
 233
 234         cadata->errorInfo = errorInfo;
 235         info = &errorInfo->info;
 236         if (identity)
 237         {
 238             info->identity = *identity;
 239         }
 240         OIC_LOG(DEBUG, TAG, "error Info :");
 241         CALogPayloadInfo(info);
 242     }
 243
 244     cadata->remoteEndpoint = ep;
 245     cadata->dataType = dataType;
 246
 247     OIC_LOG(DEBUG, TAG, "CAGenerateHandlerData OUT");
 248     return cadata;
 249 }
 250
 251 static void CATimeoutCallback(const CAEndpoint_t *endpoint, const void *pdu, uint32_t size)
 252 {
 253     VERIFY_NON_NULL_VOID(endpoint, TAG, "endpoint");
 254     VERIFY_NON_NULL_VOID(pdu, TAG, "pdu");
 255
 256     CAEndpoint_t* ep = CACloneEndpoint(endpoint);
 257     if (!ep)
 258     {
 259         OIC_LOG(ERROR, TAG, "clone failed");
 260         return;
 261     }
 262
 263     CAResponseInfo_t* resInfo = (CAResponseInfo_t*)OICCalloc(1, sizeof(CAResponseInfo_t));
 264
 265     if (!resInfo)
 266     {
 267         OIC_LOG(ERROR, TAG, "calloc failed");
 268         CAFreeEndpoint(ep);
 269         return;
 270     }
 271
 272     resInfo->result = CA_RETRANSMIT_TIMEOUT;
 273     resInfo->info.type = CAGetMessageTypeFromPduBinaryData(pdu, size);
 274     resInfo->info.messageId = CAGetMessageIdFromPduBinaryData(pdu, size);
 275
 276     CAResult_t res = CAGetTokenFromPDU((const coap_hdr_t *) pdu, &(resInfo->info),
 277                                        endpoint);
 278     if (CA_STATUS_OK != res)
 279     {
 280         OIC_LOG(ERROR, TAG, "fail to get Token from retransmission list");
 281         CADestroyResponseInfoInternal(resInfo);
 282         CAFreeEndpoint(ep);
 283         return;
 284     }
 285
 286     CAData_t *cadata = (CAData_t *) OICCalloc(1, sizeof(CAData_t));
 287     if (NULL == cadata)
 288     {
 289         OIC_LOG(ERROR, TAG, "memory allocation failed !");
 290         CAFreeEndpoint(ep);
 291         CADestroyResponseInfoInternal(resInfo);
 292         return;
 293     }
 294
 295     cadata->type = SEND_TYPE_UNICAST;
 296     cadata->remoteEndpoint = ep;
 297     cadata->requestInfo = NULL;
 298     cadata->responseInfo = resInfo;
 299
 300 #ifdef WITH_BWT
 301     if (CAIsSupportedBlockwiseTransfer(endpoint->adapter))
 302     {
 303         res = CARemoveBlockDataFromListWithSeed(resInfo->info.token, resInfo->info.tokenLength,
 304                                                 endpoint->port);
 305         if (CA_STATUS_OK != res)
 306         {
 307             OIC_LOG(ERROR, TAG, "CARemoveBlockDataFromListWithSeed failed");
 308         }
 309     }
 310 #endif // WITH_BWT
 311
 312 #ifdef SINGLE_THREAD
 313     CAProcessReceivedData(cadata);
 314 #else
 315     CAQueueingThreadAddData(&g_receiveThread, cadata, sizeof(CAData_t));
 316 #endif
 317 }
 318
 319 static void CADestroyData(void *data, uint32_t size)
 320 {
 321     OIC_LOG(DEBUG, TAG, "CADestroyData IN");
 322     if ((size_t)size < sizeof(CAData_t))
 323     {
 324         OIC_LOG_V(ERROR, TAG, "Destroy data too small %p %d", data, size);
 325     }
 326     CAData_t *cadata = (CAData_t *) data;
 327
 328     if (NULL == cadata)
 329     {
 330         OIC_LOG(ERROR, TAG, "cadata is NULL");
 331         return;
 332     }
 333
 334     if (NULL != cadata->remoteEndpoint)
 335     {
 336         CAFreeEndpoint(cadata->remoteEndpoint);
 337     }
 338
 339     if (NULL != cadata->requestInfo)
 340     {
 341         CADestroyRequestInfoInternal((CARequestInfo_t *) cadata->requestInfo);
 342     }
 343
 344     if (NULL != cadata->responseInfo)
 345     {
 346         CADestroyResponseInfoInternal((CAResponseInfo_t *) cadata->responseInfo);
 347     }
 348
 349     if (NULL != cadata->errorInfo)
 350     {
 351         CADestroyErrorInfoInternal(cadata->errorInfo);
 352     }
 353
 354     OICFree(cadata);
 355     OIC_LOG(DEBUG, TAG, "CADestroyData OUT");
 356 }
 357
 358 #ifdef SINGLE_THREAD
 359 static void CAProcessReceivedData(CAData_t *data)
 360 {
 361     OIC_LOG(DEBUG, TAG, "CAProcessReceivedData IN");
 362     if (!data)
 363     {
 364         OIC_LOG(ERROR, TAG, "thread data error!!");
 365         return;
 366     }
 367
 368     // parse the data and call the callbacks.
 369     // #1 parse the data
 370     // #2 get endpoint
 371     CAEndpoint_t *rep = (CAEndpoint_t *)(data->remoteEndpoint);
 372     if (!rep)
 373     {
 374         OIC_LOG(ERROR, TAG, "remoteEndpoint error!!");
 375         return;
 376     }
 377
 378     if (data->requestInfo && g_requestHandler)
 379     {
 380         g_requestHandler(rep, data->requestInfo);
 381     }
 382     else if (data->responseInfo && g_responseHandler)
 383     {
 384         g_responseHandler(rep, data->responseInfo);
 385     }
 386     else if (data->errorInfo && g_errorHandler)
 387     {
 388         g_errorHandler(rep, data->errorInfo);
 389     }
 390
 391     CADestroyData(data, sizeof(CAData_t));
 392
 393     OIC_LOG(DEBUG, TAG, "CAProcessReceivedData OUT");
 394 }
 395 #endif
 396
 397 #ifndef SINGLE_THREAD
 398 static void CAReceiveThreadProcess(void *threadData)
 399 {
 400 #ifndef SINGLE_HANDLE
 401     CAData_t *data = (CAData_t *) threadData;
 402     CAProcessReceivedData(data);
 403 #else
 404     (void)threadData;
 405 #endif
 406 }
 407 #endif // SINGLE_THREAD
 408
 409 static CAResult_t CAProcessMulticastData(const CAData_t *data)
 410 {
 411     VERIFY_NON_NULL(data, TAG, "data");
 412     VERIFY_NON_NULL(data->remoteEndpoint, TAG, "remoteEndpoint");
 413
 414     coap_pdu_t *pdu = NULL;
 415     CAInfo_t *info = NULL;
 416     coap_list_t *options = NULL;
 417     coap_transport_type transport = coap_udp;
 418     CAResult_t res = CA_SEND_FAILED;
 419     if (NULL != data->requestInfo)
 420     {
 421         OIC_LOG(DEBUG, TAG, "requestInfo is available..");
 422
 423         info = &data->requestInfo->info;
 424         pdu = CAGeneratePDU(CA_GET, info, data->remoteEndpoint, &options, &transport);
 425
 426         if (NULL != pdu)
 427         {
 428 #ifdef WITH_BWT
 429             if (CAIsSupportedBlockwiseTransfer(data->remoteEndpoint->adapter))
 430             {
 431                 // Blockwise transfer
 432                 res = CAAddBlockOption(&pdu, info, data->remoteEndpoint, &options);
 433                 if (CA_STATUS_OK != res)
 434                 {
 435                     OIC_LOG(DEBUG, TAG, "CAAddBlockOption has failed");
 436                     goto exit;
 437                 }
 438             }
 439 #endif // WITH_BWT
 440         }
 441         else
 442         {
 443             OIC_LOG(ERROR,TAG,"Failed to generate multicast PDU");
 444             CASendErrorInfo(data->remoteEndpoint, info, CA_SEND_FAILED);
 445             return res;
 446         }
 447     }
 448     else if (NULL != data->responseInfo)
 449     {
 450         OIC_LOG(DEBUG, TAG, "responseInfo is available..");
 451
 452         info = &data->responseInfo->info;
 453         pdu = CAGeneratePDU(data->responseInfo->result, info, data->remoteEndpoint,
 454                             &options, &transport);
 455
 456         if (NULL != pdu)
 457         {
 458 #ifdef WITH_BWT
 459             if (CAIsSupportedBlockwiseTransfer(data->remoteEndpoint->adapter))
 460             {
 461                 // Blockwise transfer
 462                 if (NULL != info)
 463                 {
 464                     res = CAAddBlockOption(&pdu, info, data->remoteEndpoint, &options);
 465                     if (CA_STATUS_OK != res)
 466                     {
 467                         OIC_LOG(INFO, TAG, "to write block option has failed");
 468                         goto exit;
 469                     }
 470                 }
 471             }
 472 #endif // WITH_BWT
 473         }
 474         else
 475         {
 476             OIC_LOG(ERROR,TAG,"Failed to generate multicast PDU");
 477             CASendErrorInfo(data->remoteEndpoint, info, CA_SEND_FAILED);
 478             return res;
 479         }
 480     }
 481     else
 482     {
 483         OIC_LOG(ERROR, TAG, "request or response info is empty");
 484         return res;
 485     }
 486
 487     CALogPDUInfo(pdu, data->remoteEndpoint);
 488
 489     OIC_LOG(DEBUG, TAG, "pdu to send :");
 490     OIC_LOG_BUFFER(DEBUG, TAG,  (uint8_t*)pdu->hdr, pdu->length);
 491
 492     res = CASendMulticastData(data->remoteEndpoint, pdu->hdr, pdu->length);
 493     if (CA_STATUS_OK != res)
 494     {
 495         OIC_LOG_V(ERROR, TAG, "send failed:%d", res);
 496         goto exit;
 497     }
 498
 499     coap_delete_list(options);
 500     coap_delete_pdu(pdu);
 501     return res;
 502
 503 exit:
 504     CAErrorHandler(data->remoteEndpoint, pdu->hdr, pdu->length, res);
 505     coap_delete_list(options);
 506     coap_delete_pdu(pdu);
 507     return res;
 508 }
 509
 510 static CAResult_t CAProcessSendData(const CAData_t *data)
 511 {
 512     VERIFY_NON_NULL(data, TAG, "data");
 513     VERIFY_NON_NULL(data->remoteEndpoint, TAG, "remoteEndpoint");
 514
 515     CAResult_t res = CA_STATUS_FAILED;
 516
 517     CASendDataType_t type = data->type;
 518
 519     coap_pdu_t *pdu = NULL;
 520     CAInfo_t *info = NULL;
 521     coap_list_t *options = NULL;
 522     coap_transport_type transport = coap_udp;
 523
 524     if (SEND_TYPE_UNICAST == type)
 525     {
 526         OIC_LOG(DEBUG,TAG,"Unicast message");
 527
 528 #ifdef ROUTING_GATEWAY
 529         /*
 530          * When forwarding a packet, do not attempt retransmission as its the responsibility of
 531          * packet originator node
 532          */
 533         bool skipRetransmission = false;
 534 #endif
 535
 536         if (NULL != data->requestInfo)
 537         {
 538             OIC_LOG(DEBUG, TAG, "requestInfo is available..");
 539
 540             info = &data->requestInfo->info;
 541 #ifdef ROUTING_GATEWAY
 542             skipRetransmission = data->requestInfo->info.skipRetransmission;
 543 #endif
 544             pdu = CAGeneratePDU(data->requestInfo->method, info, data->remoteEndpoint,
 545                                 &options, &transport);
 546         }
 547         else if (NULL != data->responseInfo)
 548         {
 549             OIC_LOG(DEBUG, TAG, "responseInfo is available..");
 550
 551             info = &data->responseInfo->info;
 552 #ifdef ROUTING_GATEWAY
 553             skipRetransmission = data->responseInfo->info.skipRetransmission;
 554 #endif
 555             pdu = CAGeneratePDU(data->responseInfo->result, info, data->remoteEndpoint,
 556                                 &options, &transport);
 557         }
 558         else
 559         {
 560             OIC_LOG(DEBUG, TAG, "request info, response info is empty");
 561             return CA_STATUS_INVALID_PARAM;
 562         }
 563
 564         // interface controller function call.
 565         if (NULL != pdu)
 566         {
 567 #ifdef WITH_BWT
 568             if (CAIsSupportedBlockwiseTransfer(data->remoteEndpoint->adapter))
 569             {
 570                 // Blockwise transfer
 571                 if (NULL != info)
 572                 {
 573                     CAResult_t res = CAAddBlockOption(&pdu, info,
 574                                                       data->remoteEndpoint,
 575                                                       &options);
 576                     if (CA_STATUS_OK != res)
 577                     {
 578                         OIC_LOG(INFO, TAG, "to write block option has failed");
 579                         CAErrorHandler(data->remoteEndpoint, pdu->hdr, pdu->length, res);
 580                         coap_delete_list(options);
 581                         coap_delete_pdu(pdu);
 582                         return res;
 583                     }
 584                 }
 585             }
 586 #endif // WITH_BWT
 587             CALogPDUInfo(pdu, data->remoteEndpoint);
 588
 589             res = CASendUnicastData(data->remoteEndpoint, pdu->hdr, pdu->length);
 590             if (CA_STATUS_OK != res)
 591             {
 592                 OIC_LOG_V(ERROR, TAG, "send failed:%d", res);
 593                 CAErrorHandler(data->remoteEndpoint, pdu->hdr, pdu->length, res);
 594                 coap_delete_list(options);
 595                 coap_delete_pdu(pdu);
 596                 return res;
 597             }
 598
 599 #ifdef WITH_TCP
 600             if (CAIsSupportedCoAPOverTCP(data->remoteEndpoint->adapter))
 601             {
 602                 OIC_LOG(INFO, TAG, "retransmission will be not worked");
 603             }
 604             else
 605 #endif
 606 #ifdef ROUTING_GATEWAY
 607             if(!skipRetransmission)
 608 #endif
 609             {
 610                 // for retransmission
 611                 res = CARetransmissionSentData(&g_retransmissionContext, data->remoteEndpoint,
 612                                                pdu->hdr, pdu->length);
 613                 if ((CA_STATUS_OK != res) && (CA_NOT_SUPPORTED != res))
 614                 {
 615                     //when retransmission not supported this will return CA_NOT_SUPPORTED, ignore
 616                     OIC_LOG_V(INFO, TAG, "retransmission is not enabled due to error, res : %d", res);
 617                     coap_delete_list(options);
 618                     coap_delete_pdu(pdu);
 619                     return res;
 620                 }
 621             }
 622
 623             coap_delete_list(options);
 624             coap_delete_pdu(pdu);
 625         }
 626         else
 627         {
 628             OIC_LOG(ERROR,TAG,"Failed to generate unicast PDU");
 629             CASendErrorInfo(data->remoteEndpoint, info, CA_SEND_FAILED);
 630             return CA_SEND_FAILED;
 631         }
 632     }
 633     else if (SEND_TYPE_MULTICAST == type)
 634     {
 635         OIC_LOG(DEBUG,TAG,"Multicast message");
 636 #ifdef WITH_TCP
 637         /*
 638          * If CoAP over TCP is enabled, the CoAP pdu wont be same for IP and other adapters.
 639          * That's why we need to generate two pdu's, one for IP and second for other transports.
 640          * Two possible cases we might have to split: a) when adapter is CA_DEFAULT_ADAPTER
 641          * b) when one of the adapter is IP adapter(ex: CA_ADAPTER_IP | CA_ADAPTER_GATT_BTLE)
 642          */
 643         if (data->remoteEndpoint->adapter == CA_DEFAULT_ADAPTER ||
 644                 (CA_ADAPTER_IP & data->remoteEndpoint->adapter &&
 645                     CA_ADAPTER_IP != data->remoteEndpoint->adapter))
 646         {
 647             if (data->remoteEndpoint->adapter == CA_DEFAULT_ADAPTER)
 648             {
 649                 data->remoteEndpoint->adapter = CA_ALL_ADAPTERS ^ CA_ADAPTER_IP;
 650             }
 651             else
 652             {
 653                 data->remoteEndpoint->adapter = data->remoteEndpoint->adapter ^ CA_ADAPTER_IP;
 654             }
 655             CAProcessMulticastData(data);
 656             data->remoteEndpoint->adapter = CA_ADAPTER_IP;
 657             CAProcessMulticastData(data);
 658         }
 659         else
 660         {
 661             CAProcessMulticastData(data);
 662         }
 663 #else
 664         CAProcessMulticastData(data);
 665 #endif
 666     }
 667
 668     return CA_STATUS_OK;
 669 }
 670
 671 #ifndef SINGLE_THREAD
 672 static void CASendThreadProcess(void *threadData)
 673 {
 674     CAData_t *data = (CAData_t *) threadData;
 675     CAProcessSendData(data);
 676 }
 677 #endif
 678
 679 /*
 680  * If a second message arrives with the same message ID, token and the other address
 681  * family, drop it.  Typically, IPv6 beats IPv4, so the IPv4 message is dropped.
 682  */
 683 static bool CADropSecondMessage(CAHistory_t *history, const CAEndpoint_t *ep, uint16_t id,
 684                                 CAToken_t token, uint8_t tokenLength)
 685 {
 686     if (!ep)
 687     {
 688         return true;
 689     }
 690     if (ep->adapter != CA_ADAPTER_IP)
 691     {
 692         return false;
 693     }
 694     if (!caglobals.ip.dualstack)
 695     {
 696         return false;
 697     }
 698
 699     if (tokenLength > CA_MAX_TOKEN_LEN)
 700     {
 701         /*
 702          * If token length is more than CA_MAX_TOKEN_LEN,
 703          * we compare the first CA_MAX_TOKEN_LEN bytes only.
 704          */
 705         tokenLength = CA_MAX_TOKEN_LEN;
 706     }
 707
 708     bool ret = false;
 709     CATransportFlags_t familyFlags = ep->flags & CA_IPFAMILY_MASK;
 710
 711     for (size_t i = 0; i < sizeof(history->items) / sizeof(history->items[0]); i++)
 712     {
 713         CAHistoryItem_t *item = &(history->items[i]);
 714         if (id == item->messageId && tokenLength == item->tokenLength
 715             && memcmp(item->token, token, tokenLength) == 0)
 716         {
 717             if ((familyFlags ^ item->flags) == CA_IPFAMILY_MASK)
 718             {
 719                 OIC_LOG_V(INFO, TAG, "IPv%c duplicate message ignored",
 720                           familyFlags & CA_IPV6 ? '6' : '4');
 721                 ret = true;
 722                 break;
 723             }
 724         }
 725     }
 726
 727     history->items[history->nextIndex].flags = familyFlags;
 728     history->items[history->nextIndex].messageId = id;
 729     if (token && tokenLength)
 730     {
 731         memcpy(history->items[history->nextIndex].token, token, tokenLength);
 732         history->items[history->nextIndex].tokenLength = tokenLength;
 733     }
 734
 735     if (++history->nextIndex >= HISTORYSIZE)
 736     {
 737         history->nextIndex = 0;
 738     }
 739
 740     return ret;
 741 }
 742
 743 static void CAReceivedPacketCallback(const CASecureEndpoint_t *sep,
 744                                      const void *data, uint32_t dataLen)
 745 {
 746     VERIFY_NON_NULL_VOID(sep, TAG, "remoteEndpoint");
 747     VERIFY_NON_NULL_VOID(data, TAG, "data");
 748
 749     OIC_LOG(DEBUG, TAG, "received pdu data :");
 750     OIC_LOG_BUFFER(DEBUG, TAG,  data, dataLen);
 751
 752     uint32_t code = CA_NOT_FOUND;
 753     CAData_t *cadata = NULL;
 754
 755     coap_pdu_t *pdu = (coap_pdu_t *) CAParsePDU((const char *) data, dataLen, &code,
 756                                                 &(sep->endpoint));
 757     if (NULL == pdu)
 758     {
 759         OIC_LOG(ERROR, TAG, "Parse PDU failed");
 760         return;
 761     }
 762
 763     OIC_LOG_V(DEBUG, TAG, "code = %d", code);
 764     if (CA_GET == code || CA_POST == code || CA_PUT == code || CA_DELETE == code)
 765     {
 766         cadata = CAGenerateHandlerData(&(sep->endpoint), &(sep->identity), pdu, CA_REQUEST_DATA);
 767         if (!cadata)
 768         {
 769             OIC_LOG(ERROR, TAG, "CAReceivedPacketCallback, CAGenerateHandlerData failed!");
 770             coap_delete_pdu(pdu);
 771             return;
 772         }
 773     }
 774     else
 775     {
 776         cadata = CAGenerateHandlerData(&(sep->endpoint), &(sep->identity), pdu, CA_RESPONSE_DATA);
 777         if (!cadata)
 778         {
 779             OIC_LOG(ERROR, TAG, "CAReceivedPacketCallback, CAGenerateHandlerData failed!");
 780             coap_delete_pdu(pdu);
 781             return;
 782         }
 783
 784 #ifdef WITH_TCP
 785         if (CAIsSupportedCoAPOverTCP(sep->endpoint.adapter))
 786         {
 787             OIC_LOG(INFO, TAG, "retransmission is not supported");
 788         }
 789         else
 790 #endif
 791         {
 792             // for retransmission
 793             void *retransmissionPdu = NULL;
 794             CARetransmissionReceivedData(&g_retransmissionContext, cadata->remoteEndpoint, pdu->hdr,
 795                                          pdu->length, &retransmissionPdu);
 796
 797             // get token from saved data in retransmission list
 798             if (retransmissionPdu && CA_EMPTY == code)
 799             {
 800                 if (cadata->responseInfo)
 801                 {
 802                     CAInfo_t *info = &cadata->responseInfo->info;
 803                     CAResult_t res = CAGetTokenFromPDU((const coap_hdr_t *)retransmissionPdu,
 804                                                        info, &(sep->endpoint));
 805                     if (CA_STATUS_OK != res)
 806                     {
 807                         OIC_LOG(ERROR, TAG, "fail to get Token from retransmission list");
 808                         OICFree(info->token);
 809                         info->tokenLength = 0;
 810                     }
 811                 }
 812             }
 813             OICFree(retransmissionPdu);
 814         }
 815     }
 816
 817     cadata->type = SEND_TYPE_UNICAST;
 818
 819 #ifdef SINGLE_THREAD
 820     CAProcessReceivedData(cadata);
 821 #else
 822 #ifdef WITH_BWT
 823     if (CAIsSupportedBlockwiseTransfer(sep->endpoint.adapter))
 824     {
 825         CAResult_t res = CAReceiveBlockWiseData(pdu, &(sep->endpoint), cadata, dataLen);
 826         if (CA_NOT_SUPPORTED == res || CA_REQUEST_TIMEOUT == res)
 827         {
 828             OIC_LOG(DEBUG, TAG, "this message does not have block option");
 829             CAQueueingThreadAddData(&g_receiveThread, cadata, sizeof(CAData_t));
 830         }
 831         else
 832         {
 833             CADestroyData(cadata, sizeof(CAData_t));
 834         }
 835     }
 836     else
 837 #endif
 838     {
 839         CAQueueingThreadAddData(&g_receiveThread, cadata, sizeof(CAData_t));
 840     }
 841 #endif // SINGLE_THREAD
 842
 843     coap_delete_pdu(pdu);
 844 }
 845
 846 void CAHandleRequestResponseCallbacks()
 847 {
 848 #ifdef SINGLE_THREAD
 849     CAReadData();
 850     CARetransmissionBaseRoutine((void *)&g_retransmissionContext);
 851 #else
 852 #ifdef SINGLE_HANDLE
 853     // parse the data and call the callbacks.
 854     // #1 parse the data
 855     // #2 get endpoint
 856
 857     ca_mutex_lock(g_receiveThread.threadMutex);
 858
 859     u_queue_message_t *item = u_queue_get_element(g_receiveThread.dataQueue);
 860
 861     ca_mutex_unlock(g_receiveThread.threadMutex);
 862
 863     if (NULL == item || NULL == item->msg)
 864     {
 865         return;
 866     }
 867
 868     // get endpoint
 869     CAData_t *td = (CAData_t *) item->msg;
 870
 871     if (td->requestInfo && g_requestHandler)
 872     {
 873         OIC_LOG_V(DEBUG, TAG, "request callback : %d", td->requestInfo->info.numOptions);
 874         g_requestHandler(td->remoteEndpoint, td->requestInfo);
 875     }
 876     else if (td->responseInfo && g_responseHandler)
 877     {
 878         OIC_LOG_V(DEBUG, TAG, "response callback : %d", td->responseInfo->info.numOptions);
 879         g_responseHandler(td->remoteEndpoint, td->responseInfo);
 880     }
 881     else if (td->errorInfo && g_errorHandler)
 882     {
 883         OIC_LOG_V(DEBUG, TAG, "error callback error: %d", td->errorInfo->result);
 884         g_errorHandler(td->remoteEndpoint, td->errorInfo);
 885     }
 886
 887     CADestroyData(item->msg, sizeof(CAData_t));
 888     OICFree(item);
 889
 890 #endif // SINGLE_HANDLE
 891 #endif // SINGLE_THREAD
 892 }
 893
 894 static CAData_t* CAPrepareSendData(const CAEndpoint_t *endpoint, const void *sendData,
 895                                    CADataType_t dataType)
 896 {
 897     OIC_LOG(DEBUG, TAG, "CAPrepareSendData IN");
 898
 899     CAData_t *cadata = (CAData_t *) OICCalloc(1, sizeof(CAData_t));
 900     if (!cadata)
 901     {
 902         OIC_LOG(ERROR, TAG, "memory allocation failed");
 903         return NULL;
 904     }
 905
 906     if (CA_REQUEST_DATA == dataType)
 907     {
 908         // clone request info
 909         CARequestInfo_t *request = CACloneRequestInfo((CARequestInfo_t *)sendData);
 910
 911         if (!request)
 912         {
 913             OIC_LOG(ERROR, TAG, "CACloneRequestInfo failed");
 914             goto exit;
 915         }
 916
 917         cadata->type = request->isMulticast ? SEND_TYPE_MULTICAST : SEND_TYPE_UNICAST;
 918         cadata->requestInfo =  request;
 919     }
 920     else if (CA_RESPONSE_DATA == dataType)
 921     {
 922         // clone response info
 923         CAResponseInfo_t *response = CACloneResponseInfo((CAResponseInfo_t *)sendData);
 924
 925         if(!response)
 926         {
 927             OIC_LOG(ERROR, TAG, "CACloneResponseInfo failed");
 928             goto exit;
 929         }
 930
 931         cadata->type = response->isMulticast ? SEND_TYPE_MULTICAST : SEND_TYPE_UNICAST;
 932         cadata->responseInfo = response;
 933     }
 934     else
 935     {
 936         OIC_LOG(ERROR, TAG, "CAPrepareSendData unknown data type");
 937         goto exit;
 938     }
 939
 940     CAEndpoint_t* ep = CACloneEndpoint(endpoint);
 941     if (!ep)
 942     {
 943         OIC_LOG(ERROR, TAG, "endpoint clone failed");
 944         CADestroyData(cadata, sizeof(CAData_t));
 945         return NULL;
 946     }
 947
 948     cadata->remoteEndpoint = ep;
 949     cadata->dataType = dataType;
 950     return cadata;
 951
 952 exit:
 953     OICFree(cadata);
 954     return NULL;
 955 }
 956
 957 CAResult_t CADetachSendMessage(const CAEndpoint_t *endpoint, const void *sendMsg,
 958                                CADataType_t dataType)
 959 {
 960     VERIFY_NON_NULL(endpoint, TAG, "endpoint");
 961     VERIFY_NON_NULL(sendMsg, TAG, "sendMsg");
 962
 963     if (false == CAIsSelectedNetworkAvailable())
 964     {
 965         return CA_STATUS_FAILED;
 966     }
 967
 968 #ifdef ARDUINO
 969     // If max retransmission queue is reached, then don't handle new request
 970     if (CA_MAX_RT_ARRAY_SIZE == u_arraylist_length(g_retransmissionContext.dataList))
 971     {
 972         OIC_LOG(ERROR, TAG, "max RT queue size reached!");
 973         return CA_SEND_FAILED;
 974     }
 975 #endif // ARDUINO
 976
 977     CAData_t *data = CAPrepareSendData(endpoint, sendMsg, dataType);
 978     if(!data)
 979     {
 980         OIC_LOG(ERROR, TAG, "CAPrepareSendData failed");
 981         return CA_MEMORY_ALLOC_FAILED;
 982     }
 983
 984 #ifdef SINGLE_THREAD
 985     CAResult_t result = CAProcessSendData(data);
 986     if (CA_STATUS_OK != result)
 987     {
 988         OIC_LOG(ERROR, TAG, "CAProcessSendData failed");
 989         CADestroyData(data, sizeof(CAData_t));
 990         return result;
 991     }
 992
 993     CADestroyData(data, sizeof(CAData_t));
 994 #else
 995 #ifdef WITH_BWT
 996     if (CAIsSupportedBlockwiseTransfer(endpoint->adapter))
 997     {
 998         // send block data
 999         CAResult_t res = CASendBlockWiseData(data);
1000         if (CA_NOT_SUPPORTED == res)
1001         {
1002             OIC_LOG(DEBUG, TAG, "normal msg will be sent");
1003             CAQueueingThreadAddData(&g_sendThread, data, sizeof(CAData_t));
1004             return CA_STATUS_OK;
1005         }
1006         else
1007         {
1008             CADestroyData(data, sizeof(CAData_t));
1009         }
1010         return res;
1011     }
1012     else
1013 #endif // WITH_BWT
1014     {
1015         CAQueueingThreadAddData(&g_sendThread, data, sizeof(CAData_t));
1016     }
1017 #endif // SINGLE_THREAD
1018
1019     return CA_STATUS_OK;
1020 }
1021
1022 void CASetInterfaceCallbacks(CARequestCallback ReqHandler, CAResponseCallback RespHandler,
1023                              CAErrorCallback errorHandler)
1024 {
1025     g_requestHandler = ReqHandler;
1026     g_responseHandler = RespHandler;
1027     g_errorHandler = errorHandler;
1028 }
1029
1030 void CASetNetworkMonitorCallback(CANetworkMonitorCallback nwMonitorHandler)
1031 {
1032     g_nwMonitorHandler = nwMonitorHandler;
1033 }
1034
1035 CAResult_t CAInitializeMessageHandler()
1036 {
1037     CASetPacketReceivedCallback(CAReceivedPacketCallback);
1038     CASetErrorHandleCallback(CAErrorHandler);
1039
1040 #ifndef SINGLE_THREAD
1041     // create thread pool
1042     CAResult_t res = ca_thread_pool_init(MAX_THREAD_POOL_SIZE, &g_threadPoolHandle);
1043     if (CA_STATUS_OK != res)
1044     {
1045         OIC_LOG(ERROR, TAG, "thread pool initialize error.");
1046         return res;
1047     }
1048
1049     // send thread initialize
1050     res = CAQueueingThreadInitialize(&g_sendThread, g_threadPoolHandle,
1051                                      CASendThreadProcess, CADestroyData);
1052     if (CA_STATUS_OK != res)
1053     {
1054         OIC_LOG(ERROR, TAG, "Failed to Initialize send queue thread");
1055         ca_thread_pool_free(g_threadPoolHandle);
1056         g_threadPoolHandle = NULL;
1057         return res;
1058     }
1059
1060     // start send thread
1061     res = CAQueueingThreadStart(&g_sendThread);
1062     if (CA_STATUS_OK != res)
1063     {
1064         OIC_LOG(ERROR, TAG, "thread start error(send thread).");
1065         ca_thread_pool_free(g_threadPoolHandle);
1066         g_threadPoolHandle = NULL;
1067         CAQueueingThreadDestroy(&g_sendThread);
1068         return res;
1069     }
1070
1071     // receive thread initialize
1072     res = CAQueueingThreadInitialize(&g_receiveThread, g_threadPoolHandle,
1073                                      CAReceiveThreadProcess, CADestroyData);
1074     if (CA_STATUS_OK != res)
1075     {
1076         OIC_LOG(ERROR, TAG, "Failed to Initialize receive queue thread");
1077         ca_thread_pool_free(g_threadPoolHandle);
1078         g_threadPoolHandle = NULL;
1079         CAQueueingThreadDestroy(&g_sendThread);
1080         return res;
1081     }
1082
1083 #ifndef SINGLE_HANDLE // This will be enabled when RI supports multi threading
1084     // start receive thread
1085     res = CAQueueingThreadStart(&g_receiveThread);
1086     if (CA_STATUS_OK != res)
1087     {
1088         OIC_LOG(ERROR, TAG, "thread start error(receive thread).");
1089         ca_thread_pool_free(g_threadPoolHandle);
1090         g_threadPoolHandle = NULL;
1091         CAQueueingThreadDestroy(&g_sendThread);
1092         CAQueueingThreadDestroy(&g_receiveThread);
1093         return res;
1094     }
1095 #endif // SINGLE_HANDLE
1096
1097     // retransmission initialize
1098     res = CARetransmissionInitialize(&g_retransmissionContext, g_threadPoolHandle,
1099                                      CASendUnicastData, CATimeoutCallback, NULL);
1100     if (CA_STATUS_OK != res)
1101     {
1102         OIC_LOG(ERROR, TAG, "Failed to Initialize Retransmission.");
1103         ca_thread_pool_free(g_threadPoolHandle);
1104         g_threadPoolHandle = NULL;
1105         CAQueueingThreadDestroy(&g_sendThread);
1106         CAQueueingThreadDestroy(&g_receiveThread);
1107         return res;
1108     }
1109
1110 #ifdef WITH_BWT
1111     // block-wise transfer initialize
1112     res = CAInitializeBlockWiseTransfer(CAAddDataToSendThread, CAAddDataToReceiveThread);
1113     if (CA_STATUS_OK != res)
1114     {
1115         OIC_LOG(ERROR, TAG, "Failed to Initialize BlockWiseTransfer.");
1116         ca_thread_pool_free(g_threadPoolHandle);
1117         g_threadPoolHandle = NULL;
1118         CAQueueingThreadDestroy(&g_sendThread);
1119         CAQueueingThreadDestroy(&g_receiveThread);
1120         CARetransmissionDestroy(&g_retransmissionContext);
1121         return res;
1122     }
1123 #endif
1124
1125     // start retransmission
1126     res = CARetransmissionStart(&g_retransmissionContext);
1127     if (CA_STATUS_OK != res)
1128     {
1129         OIC_LOG(ERROR, TAG, "thread start error(retransmission thread).");
1130         ca_thread_pool_free(g_threadPoolHandle);
1131         g_threadPoolHandle = NULL;
1132         CAQueueingThreadDestroy(&g_sendThread);
1133         CAQueueingThreadDestroy(&g_receiveThread);
1134         CARetransmissionDestroy(&g_retransmissionContext);
1135         return res;
1136     }
1137
1138     // initialize interface adapters by controller
1139     CAInitializeAdapters(g_threadPoolHandle);
1140 #else
1141     // retransmission initialize
1142     CAResult_t res = CARetransmissionInitialize(&g_retransmissionContext, NULL, CASendUnicastData,
1143                                                 CATimeoutCallback, NULL);
1144     if (CA_STATUS_OK != res)
1145     {
1146         OIC_LOG(ERROR, TAG, "Failed to Initialize Retransmission.");
1147         return res;
1148     }
1149
1150     CAInitializeAdapters();
1151 #endif // SINGLE_THREAD
1152
1153     return CA_STATUS_OK;
1154 }
1155
1156 void CATerminateMessageHandler()
1157 {
1158 #ifndef SINGLE_THREAD
1159     CATransportAdapter_t connType;
1160     u_arraylist_t *list = CAGetSelectedNetworkList();
1161     uint32_t length = u_arraylist_length(list);
1162
1163     uint32_t i = 0;
1164     for (i = 0; i < length; i++)
1165     {
1166         void* ptrType = u_arraylist_get(list, i);
1167
1168         if (NULL == ptrType)
1169         {
1170             continue;
1171         }
1172
1173         connType = *(CATransportAdapter_t *)ptrType;
1174         CAStopAdapter(connType);
1175     }
1176
1177     // stop retransmission
1178     if (NULL != g_retransmissionContext.threadMutex)
1179     {
1180         CARetransmissionStop(&g_retransmissionContext);
1181     }
1182
1183     // stop thread
1184     // delete thread data
1185     if (NULL != g_sendThread.threadMutex)
1186     {
1187         CAQueueingThreadStop(&g_sendThread);
1188     }
1189
1190     // stop thread
1191     // delete thread data
1192     if (NULL != g_receiveThread.threadMutex)
1193     {
1194 #ifndef SINGLE_HANDLE // This will be enabled when RI supports multi threading
1195         CAQueueingThreadStop(&g_receiveThread);
1196 #endif
1197     }
1198
1199     // destroy thread pool
1200     if (NULL != g_threadPoolHandle)
1201     {
1202         ca_thread_pool_free(g_threadPoolHandle);
1203         g_threadPoolHandle = NULL;
1204     }
1205
1206 #ifdef WITH_BWT
1207     CATerminateBlockWiseTransfer();
1208 #endif
1209     CARetransmissionDestroy(&g_retransmissionContext);
1210     CAQueueingThreadDestroy(&g_sendThread);
1211     CAQueueingThreadDestroy(&g_receiveThread);
1212
1213     // terminate interface adapters by controller
1214     CATerminateAdapters();
1215 #else
1216     // terminate interface adapters by controller
1217     CATerminateAdapters();
1218
1219     // stop retransmission
1220     CARetransmissionStop(&g_retransmissionContext);
1221     CARetransmissionDestroy(&g_retransmissionContext);
1222 #endif // SINGLE_THREAD
1223 }
1224
1225 void CALogPDUInfo(coap_pdu_t *pdu, const CAEndpoint_t *endpoint)
1226 {
1227     VERIFY_NON_NULL_VOID(pdu, TAG, "pdu");
1228     VERIFY_NON_NULL_VOID(endpoint, TAG, "endpoint");
1229
1230     OIC_LOG_V(DEBUG, TAG, "PDU Maker - payload : %s", pdu->data);
1231
1232 #ifdef WITH_TCP
1233     if (CAIsSupportedCoAPOverTCP(endpoint->adapter))
1234     {
1235         OIC_LOG(DEBUG, TAG, "pdu header data :");
1236         OIC_LOG_BUFFER(DEBUG, TAG,  (const uint8_t *) pdu->hdr, pdu->length);
1237     }
1238     else
1239 #endif
1240     {
1241         OIC_LOG_V(DEBUG, TAG, "PDU Maker - type : %d", pdu->hdr->coap_hdr_udp_t.type);
1242
1243         OIC_LOG_V(DEBUG, TAG, "PDU Maker - code : %d", pdu->hdr->coap_hdr_udp_t.code);
1244
1245         OIC_LOG(DEBUG, TAG, "PDU Maker - token :");
1246
1247         OIC_LOG_BUFFER(DEBUG, TAG, pdu->hdr->coap_hdr_udp_t.token,
1248                        pdu->hdr->coap_hdr_udp_t.token_length);
1249     }
1250 }
1251
1252 static void CALogPayloadInfo(CAInfo_t *info)
1253 {
1254     if (info)
1255     {
1256         if (info->options)
1257         {
1258             for (uint32_t i = 0; i < info->numOptions; i++)
1259             {
1260                 OIC_LOG_V(DEBUG, TAG, "optionID: %u", info->options[i].optionID);
1261
1262                 OIC_LOG_V(DEBUG, TAG, "list: %s", info->options[i].optionData);
1263             }
1264         }
1265
1266         if (info->payload)
1267         {
1268             OIC_LOG_V(DEBUG, TAG, "payload: %p(%zu)", info->payload,
1269                       info->payloadSize);
1270         }
1271
1272         if (info->token)
1273         {
1274             OIC_LOG(DEBUG, TAG, "token:");
1275             OIC_LOG_BUFFER(DEBUG, TAG, (const uint8_t *) info->token,
1276                            info->tokenLength);
1277         }
1278         OIC_LOG_V(DEBUG, TAG, "msgID: %u", info->messageId);
1279     }
1280     else
1281     {
1282         OIC_LOG(DEBUG, TAG, "info is NULL, cannot output log data");
1283     }
1284 }
1285
1286 void CAErrorHandler(const CAEndpoint_t *endpoint,
1287                     const void *data, uint32_t dataLen,
1288                     CAResult_t result)
1289 {
1290     OIC_LOG(DEBUG, TAG, "CAErrorHandler IN");
1291
1292 #ifndef SINGLE_THREAD
1293     VERIFY_NON_NULL_VOID(endpoint, TAG, "remoteEndpoint");
1294     VERIFY_NON_NULL_VOID(data, TAG, "data");
1295
1296     uint32_t code = CA_NOT_FOUND;
1297     //Do not free remoteEndpoint and data. Currently they will be freed in data thread
1298     //Get PDU data
1299     coap_pdu_t *pdu = (coap_pdu_t *)CAParsePDU((const char *)data, dataLen, &code, endpoint);
1300     if (NULL == pdu)
1301     {
1302         OIC_LOG(ERROR, TAG, "Parse PDU failed");
1303         return;
1304     }
1305
1306     CAData_t *cadata = CAGenerateHandlerData(endpoint, NULL, pdu, CA_ERROR_DATA);
1307     if(!cadata)
1308     {
1309         OIC_LOG(ERROR, TAG, "CAErrorHandler, CAGenerateHandlerData failed!");
1310         coap_delete_pdu(pdu);
1311         return;
1312     }
1313
1314     cadata->errorInfo->result = result;
1315
1316     CAQueueingThreadAddData(&g_receiveThread, cadata, sizeof(CAData_t));
1317     coap_delete_pdu(pdu);
1318 #endif
1319
1320     OIC_LOG(DEBUG, TAG, "CAErrorHandler OUT");
1321     return;
1322 }
1323
1324 static void CASendErrorInfo(const CAEndpoint_t *endpoint, const CAInfo_t *info, CAResult_t result)
1325 {
1326     OIC_LOG(DEBUG, TAG, "CASendErrorInfo IN");
1327 #ifndef SINGLE_THREAD
1328     CAData_t *cadata = (CAData_t *) OICCalloc(1, sizeof(CAData_t));
1329     if (!cadata)
1330     {
1331         OIC_LOG(ERROR, TAG, "cadata memory allocation failed");
1332         return;
1333     }
1334
1335     CAEndpoint_t* ep = CACloneEndpoint(endpoint);
1336     if (!ep)
1337     {
1338         OIC_LOG(ERROR, TAG, "endpoint clone failed");
1339         OICFree(cadata);
1340         return;
1341     }
1342
1343     CAErrorInfo_t *errorInfo = (CAErrorInfo_t *)OICCalloc(1, sizeof (CAErrorInfo_t));
1344     if (!errorInfo)
1345     {
1346         OIC_LOG(ERROR, TAG, "errorInfo memory allocation failed");
1347         OICFree(cadata);
1348         CAFreeEndpoint(ep);
1349         return;
1350     }
1351
1352     CAResult_t res = CACloneInfo(info, &errorInfo->info);
1353     if (CA_STATUS_OK != res)
1354     {
1355         OIC_LOG(ERROR, TAG, "info clone failed");
1356         OICFree(cadata);
1357         OICFree(errorInfo);
1358         CAFreeEndpoint(ep);
1359         return;
1360     }
1361
1362     errorInfo->result = result;
1363     cadata->remoteEndpoint = ep;
1364     cadata->errorInfo = errorInfo;
1365     cadata->dataType = CA_ERROR_DATA;
1366
1367     CAQueueingThreadAddData(&g_receiveThread, cadata, sizeof(CAData_t));
1368 #endif
1369     OIC_LOG(DEBUG, TAG, "CASendErrorInfo OUT");
1370 }