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
  38 #ifdef WITH_BWT
  39 #include "cablockwisetransfer.h"
  40 #endif
  41
  42 #ifndef  SINGLE_THREAD
  43 #include "uqueue.h"
  44 #include "cathreadpool.h" /* for thread pool */
  45 #include "caqueueingthread.h"
  46
  47 #define SINGLE_HANDLE
  48 #define MAX_THREAD_POOL_SIZE    20
  49
  50 // thread pool handle
  51 static ca_thread_pool_t g_threadPoolHandle = NULL;
  52
  53 // message handler main thread
  54 static CAQueueingThread_t g_sendThread;
  55 static CAQueueingThread_t g_receiveThread;
  56
  57 #else
  58 #define CA_MAX_RT_ARRAY_SIZE    3
  59 #endif  // SINGLE_THREAD
  60
  61 #define TAG "OIC_CA_MSG_HANDLE"
  62
  63 static CARetransmission_t g_retransmissionContext;
  64
  65 // handler field
  66 static CARequestCallback g_requestHandler = NULL;
  67 static CAResponseCallback g_responseHandler = NULL;
  68 static CAErrorCallback g_errorHandler = NULL;
  69 static CANetworkMonitorCallback g_nwMonitorHandler = NULL;
  70
  71 static void CAErrorHandler(const CAEndpoint_t *endpoint,
  72                            const void *data, uint32_t dataLen,
  73                            CAResult_t result);
  74
  75 static CAData_t* CAGenerateHandlerData(const CAEndpoint_t *endpoint,
  76                                        const CARemoteId_t *identity,
  77                                        const void *data, CADataType_t dataType);
  78
  79 static void CASendErrorInfo(const CAEndpoint_t *endpoint, const CAInfo_t *info,
  80                             CAResult_t result);
  81
  82 #ifdef SINGLE_THREAD
  83 static void CAProcessReceivedData(CAData_t *data);
  84 #endif
  85 static void CADestroyData(void *data, uint32_t size);
  86 static void CALogPayloadInfo(CAInfo_t *info);
  87 static bool CADropSecondMessage(CAHistory_t *history, const CAEndpoint_t *endpoint, uint16_t id,
  88                                 CAToken_t token, uint8_t tokenLength);
  89
  90 #ifdef WITH_BWT
  91 void CAAddDataToSendThread(CAData_t *data)
  92 {
  93     VERIFY_NON_NULL_VOID(data, TAG, "data");
  94
  95     // add thread
  96     CAQueueingThreadAddData(&g_sendThread, data, sizeof(CAData_t));
  97 }
  98
  99 void CAAddDataToReceiveThread(CAData_t *data)
 100 {
 101     VERIFY_NON_NULL_VOID(data, TAG, "data");
 102
 103     // add thread
 104     CAQueueingThreadAddData(&g_receiveThread, data, sizeof(CAData_t));
 105 }
 106 #endif
 107
 108 static bool CAIsSelectedNetworkAvailable()
 109 {
 110     u_arraylist_t *list = CAGetSelectedNetworkList();
 111     if (!list || u_arraylist_length(list) == 0)
 112     {
 113         OIC_LOG(ERROR, TAG, "No selected network");
 114         return false;
 115     }
 116
 117     return true;
 118 }
 119
 120 static CAData_t* CAGenerateHandlerData(const CAEndpoint_t *endpoint,
 121                                        const CARemoteId_t *identity,
 122                                        const void *data, CADataType_t dataType)
 123 {
 124     OIC_LOG(DEBUG, TAG, "CAGenerateHandlerData IN");
 125     CAInfo_t *info = NULL;
 126     CAData_t *cadata = (CAData_t *) OICCalloc(1, sizeof(CAData_t));
 127     if (!cadata)
 128     {
 129         OIC_LOG(ERROR, TAG, "memory allocation failed");
 130         return NULL;
 131     }
 132
 133     CAEndpoint_t* ep = CACloneEndpoint(endpoint);
 134     if (!ep)
 135     {
 136         OIC_LOG(ERROR, TAG, "endpoint clone failed");
 137         OICFree(cadata);
 138         return NULL;
 139     }
 140
 141     OIC_LOG_V(DEBUG, TAG, "address : %s", ep->addr);
 142     CAResult_t result;
 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         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         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;
 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;
 523
 524     if (SEND_TYPE_UNICAST == type)
 525     {
 526         OIC_LOG(DEBUG,TAG,"Unicast message");
 527 #ifdef ROUTING_GATEWAY
 528         /*
 529          * When forwarding a packet, do not attempt retransmission as its the responsibility of
 530          * packet originator node
 531          */
 532         bool skipRetransmission = false;
 533 #endif
 534
 535         if (NULL != data->requestInfo)
 536         {
 537             OIC_LOG(DEBUG, TAG, "requestInfo is available..");
 538
 539             info = &data->requestInfo->info;
 540 #ifdef ROUTING_GATEWAY
 541             skipRetransmission = data->requestInfo->info.skipRetransmission;
 542 #endif
 543             pdu = CAGeneratePDU(data->requestInfo->method, info, data->remoteEndpoint,
 544                                 &options, &transport);
 545         }
 546         else if (NULL != data->responseInfo)
 547         {
 548             OIC_LOG(DEBUG, TAG, "responseInfo is available..");
 549
 550             info = &data->responseInfo->info;
 551 #ifdef ROUTING_GATEWAY
 552             skipRetransmission = data->responseInfo->info.skipRetransmission;
 553 #endif
 554             pdu = CAGeneratePDU(data->responseInfo->result, info, data->remoteEndpoint,
 555                                 &options, &transport);
 556         }
 557         else
 558         {
 559             OIC_LOG(DEBUG, TAG, "request info, response info is empty");
 560             return CA_STATUS_INVALID_PARAM;
 561         }
 562
 563         // interface controller function call.
 564         if (NULL != pdu)
 565         {
 566 #ifdef WITH_BWT
 567             if (CAIsSupportedBlockwiseTransfer(data->remoteEndpoint->adapter))
 568             {
 569                 // Blockwise transfer
 570                 if (NULL != info)
 571                 {
 572                     CAResult_t res = CAAddBlockOption(&pdu, info,
 573                                                       data->remoteEndpoint,
 574                                                       &options);
 575                     if (CA_STATUS_OK != res)
 576                     {
 577                         OIC_LOG(INFO, TAG, "to write block option has failed");
 578                         CAErrorHandler(data->remoteEndpoint, pdu->hdr, pdu->length, res);
 579                         coap_delete_list(options);
 580                         coap_delete_pdu(pdu);
 581                         return res;
 582                     }
 583                 }
 584             }
 585 #endif // WITH_BWT
 586             CALogPDUInfo(pdu, data->remoteEndpoint);
 587
 588             res = CASendUnicastData(data->remoteEndpoint, pdu->hdr, pdu->length);
 589             if (CA_STATUS_OK != res)
 590             {
 591                 OIC_LOG_V(ERROR, TAG, "send failed:%d", res);
 592                 CAErrorHandler(data->remoteEndpoint, pdu->hdr, pdu->length, res);
 593                 coap_delete_list(options);
 594                 coap_delete_pdu(pdu);
 595                 return res;
 596             }
 597
 598 #ifdef WITH_TCP
 599             if (CAIsSupportedCoAPOverTCP(data->remoteEndpoint->adapter))
 600             {
 601                 OIC_LOG(INFO, TAG, "retransmission will be not worked");
 602             }
 603             else
 604 #endif
 605 #ifdef ROUTING_GATEWAY
 606             if(!skipRetransmission)
 607 #endif
 608             {
 609                 // for retransmission
 610                 res = CARetransmissionSentData(&g_retransmissionContext, data->remoteEndpoint,
 611                                                pdu->hdr, pdu->length);
 612                 if ((CA_STATUS_OK != res) && (CA_NOT_SUPPORTED != res))
 613                 {
 614                     //when retransmission not supported this will return CA_NOT_SUPPORTED, ignore
 615                     OIC_LOG_V(INFO, TAG, "retransmission is not enabled due to error, res : %d", res);
 616                     coap_delete_list(options);
 617                     coap_delete_pdu(pdu);
 618                     return res;
 619                 }
 620             }
 621
 622             coap_delete_list(options);
 623             coap_delete_pdu(pdu);
 624         }
 625         else
 626         {
 627             OIC_LOG(ERROR,TAG,"Failed to generate unicast PDU");
 628             CASendErrorInfo(data->remoteEndpoint, info, CA_SEND_FAILED);
 629             return CA_SEND_FAILED;
 630         }
 631     }
 632     else if (SEND_TYPE_MULTICAST == type)
 633     {
 634         OIC_LOG(DEBUG,TAG,"Multicast message");
 635 #ifdef WITH_TCP
 636         /*
 637          * If CoAP over TCP is enabled, the CoAP pdu wont be same for IP and other adapters.
 638          * That's why we need to generate two pdu's, one for IP and second for other transports.
 639          * Two possible cases we might have to split: a) when adapter is CA_DEFAULT_ADAPTER
 640          * b) when one of the adapter is IP adapter(ex: CA_ADAPTER_IP | CA_ADAPTER_GATT_BTLE)
 641          */
 642         if (data->remoteEndpoint->adapter == CA_DEFAULT_ADAPTER ||
 643                 (CA_ADAPTER_IP & data->remoteEndpoint->adapter &&
 644                     CA_ADAPTER_IP != data->remoteEndpoint->adapter))
 645         {
 646             if (data->remoteEndpoint->adapter == CA_DEFAULT_ADAPTER)
 647             {
 648                 data->remoteEndpoint->adapter = CA_ALL_ADAPTERS ^ CA_ADAPTER_IP;
 649             }
 650             else
 651             {
 652                 data->remoteEndpoint->adapter = data->remoteEndpoint->adapter ^ CA_ADAPTER_IP;
 653             }
 654             CAProcessMulticastData(data);
 655             data->remoteEndpoint->adapter = CA_ADAPTER_IP;
 656             CAProcessMulticastData(data);
 657         }
 658         else
 659         {
 660             CAProcessMulticastData(data);
 661         }
 662 #else
 663         CAProcessMulticastData(data);
 664 #endif
 665     }
 666
 667     return CA_STATUS_OK;
 668 }
 669
 670 #ifndef SINGLE_THREAD
 671 static void CASendThreadProcess(void *threadData)
 672 {
 673     CAData_t *data = (CAData_t *) threadData;
 674     CAProcessSendData(data);
 675 }
 676 #endif
 677
 678 /*
 679  * If a second message arrives with the same message ID, token and the other address
 680  * family, drop it.  Typically, IPv6 beats IPv4, so the IPv4 message is dropped.
 681  */
 682 static bool CADropSecondMessage(CAHistory_t *history, const CAEndpoint_t *ep, uint16_t id,
 683                                 CAToken_t token, uint8_t tokenLength)
 684 {
 685     if (!ep)
 686     {
 687         return true;
 688     }
 689     if (ep->adapter != CA_ADAPTER_IP)
 690     {
 691         return false;
 692     }
 693     if (!caglobals.ip.dualstack)
 694     {
 695         return false;
 696     }
 697
 698     if (tokenLength > CA_MAX_TOKEN_LEN)
 699     {
 700         /*
 701          * If token length is more than CA_MAX_TOKEN_LEN,
 702          * we compare the first CA_MAX_TOKEN_LEN bytes only.
 703          */
 704         tokenLength = CA_MAX_TOKEN_LEN;
 705     }
 706
 707     bool ret = false;
 708     CATransportFlags_t familyFlags = ep->flags & CA_IPFAMILY_MASK;
 709
 710     for (size_t i = 0; i < sizeof(history->items) / sizeof(history->items[0]); i++)
 711     {
 712         CAHistoryItem_t *item = &(history->items[i]);
 713         if (id == item->messageId && tokenLength == item->tokenLength
 714             && memcmp(item->token, token, tokenLength) == 0)
 715         {
 716             if ((familyFlags ^ item->flags) == CA_IPFAMILY_MASK)
 717             {
 718                 OIC_LOG_V(INFO, TAG, "IPv%c duplicate message ignored",
 719                           familyFlags & CA_IPV6 ? '6' : '4');
 720                 ret = true;
 721                 break;
 722             }
 723         }
 724     }
 725
 726     history->items[history->nextIndex].flags = familyFlags;
 727     history->items[history->nextIndex].messageId = id;
 728     if (token && tokenLength)
 729     {
 730         memcpy(history->items[history->nextIndex].token, token, tokenLength);
 731         history->items[history->nextIndex].tokenLength = tokenLength;
 732     }
 733
 734     if (++history->nextIndex >= HISTORYSIZE)
 735     {
 736         history->nextIndex = 0;
 737     }
 738
 739     return ret;
 740 }
 741
 742 static void CAReceivedPacketCallback(const CASecureEndpoint_t *sep,
 743                                      const void *data, uint32_t dataLen)
 744 {
 745     VERIFY_NON_NULL_VOID(sep, TAG, "remoteEndpoint");
 746     VERIFY_NON_NULL_VOID(data, TAG, "data");
 747
 748     OIC_LOG(DEBUG, TAG, "received pdu data :");
 749     OIC_LOG_BUFFER(DEBUG, TAG,  data, dataLen);
 750
 751     uint32_t code = CA_NOT_FOUND;
 752     CAData_t *cadata = NULL;
 753
 754     coap_pdu_t *pdu = (coap_pdu_t *) CAParsePDU((const char *) data, dataLen, &code,
 755                                                 &(sep->endpoint));
 756     if (NULL == pdu)
 757     {
 758         OIC_LOG(ERROR, TAG, "Parse PDU failed");
 759         return;
 760     }
 761
 762     OIC_LOG_V(DEBUG, TAG, "code = %d", code);
 763     if (CA_GET == code || CA_POST == code || CA_PUT == code || CA_DELETE == code)
 764     {
 765         cadata = CAGenerateHandlerData(&(sep->endpoint), &(sep->identity), pdu, CA_REQUEST_DATA);
 766         if (!cadata)
 767         {
 768             OIC_LOG(ERROR, TAG, "CAReceivedPacketCallback, CAGenerateHandlerData failed!");
 769             coap_delete_pdu(pdu);
 770             return;
 771         }
 772     }
 773     else
 774     {
 775         cadata = CAGenerateHandlerData(&(sep->endpoint), &(sep->identity), pdu, CA_RESPONSE_DATA);
 776         if (!cadata)
 777         {
 778             OIC_LOG(ERROR, TAG, "CAReceivedPacketCallback, CAGenerateHandlerData failed!");
 779             coap_delete_pdu(pdu);
 780             return;
 781         }
 782
 783 #ifdef WITH_TCP
 784         if (CAIsSupportedCoAPOverTCP(sep->endpoint.adapter))
 785         {
 786             OIC_LOG(INFO, TAG, "retransmission is not supported");
 787         }
 788         else
 789 #endif
 790         {
 791             // for retransmission
 792             void *retransmissionPdu = NULL;
 793             CARetransmissionReceivedData(&g_retransmissionContext, cadata->remoteEndpoint, pdu->hdr,
 794                                          pdu->length, &retransmissionPdu);
 795
 796             // get token from saved data in retransmission list
 797             if (retransmissionPdu && CA_EMPTY == code)
 798             {
 799                 if (cadata->responseInfo)
 800                 {
 801                     CAInfo_t *info = &cadata->responseInfo->info;
 802                     CAResult_t res = CAGetTokenFromPDU((const coap_hdr_t *)retransmissionPdu,
 803                                                        info, &(sep->endpoint));
 804                     if (CA_STATUS_OK != res)
 805                     {
 806                         OIC_LOG(ERROR, TAG, "fail to get Token from retransmission list");
 807                         OICFree(info->token);
 808                         info->tokenLength = 0;
 809                     }
 810                 }
 811             }
 812             OICFree(retransmissionPdu);
 813         }
 814     }
 815
 816     cadata->type = SEND_TYPE_UNICAST;
 817
 818 #ifdef SINGLE_THREAD
 819     CAProcessReceivedData(cadata);
 820 #else
 821 #ifdef WITH_BWT
 822     if (CAIsSupportedBlockwiseTransfer(sep->endpoint.adapter))
 823     {
 824         CAResult_t res = CAReceiveBlockWiseData(pdu, &(sep->endpoint), cadata, dataLen);
 825         if (CA_NOT_SUPPORTED == res || CA_REQUEST_TIMEOUT == res)
 826         {
 827             OIC_LOG(ERROR, TAG, "this message does not have block option");
 828             CAQueueingThreadAddData(&g_receiveThread, cadata, sizeof(CAData_t));
 829         }
 830         else
 831         {
 832             CADestroyData(cadata, sizeof(CAData_t));
 833         }
 834     }
 835     else
 836 #endif
 837     {
 838         CAQueueingThreadAddData(&g_receiveThread, cadata, sizeof(CAData_t));
 839     }
 840 #endif // SINGLE_THREAD
 841
 842     coap_delete_pdu(pdu);
 843 }
 844
 845 void CAHandleRequestResponseCallbacks()
 846 {
 847 #ifdef SINGLE_THREAD
 848     CAReadData();
 849     CARetransmissionBaseRoutine((void *)&g_retransmissionContext);
 850 #else
 851 #ifdef SINGLE_HANDLE
 852     // parse the data and call the callbacks.
 853     // #1 parse the data
 854     // #2 get endpoint
 855
 856     ca_mutex_lock(g_receiveThread.threadMutex);
 857
 858     u_queue_message_t *item = u_queue_get_element(g_receiveThread.dataQueue);
 859
 860     ca_mutex_unlock(g_receiveThread.threadMutex);
 861
 862     if (NULL == item || NULL == item->msg)
 863     {
 864         return;
 865     }
 866
 867     // get endpoint
 868     CAData_t *td = (CAData_t *) item->msg;
 869
 870     if (td->requestInfo && g_requestHandler)
 871     {
 872         OIC_LOG_V(DEBUG, TAG, "request callback : %d", td->requestInfo->info.numOptions);
 873         g_requestHandler(td->remoteEndpoint, td->requestInfo);
 874     }
 875     else if (td->responseInfo && g_responseHandler)
 876     {
 877         OIC_LOG_V(DEBUG, TAG, "response callback : %d", td->responseInfo->info.numOptions);
 878         g_responseHandler(td->remoteEndpoint, td->responseInfo);
 879     }
 880     else if (td->errorInfo && g_errorHandler)
 881     {
 882         OIC_LOG_V(DEBUG, TAG, "error callback error: %d", td->errorInfo->result);
 883         g_errorHandler(td->remoteEndpoint, td->errorInfo);
 884     }
 885
 886     CADestroyData(item->msg, sizeof(CAData_t));
 887     OICFree(item);
 888
 889 #endif // SINGLE_HANDLE
 890 #endif // SINGLE_THREAD
 891 }
 892
 893 static CAData_t* CAPrepareSendData(const CAEndpoint_t *endpoint, const void *sendData,
 894                                    CADataType_t dataType)
 895 {
 896     OIC_LOG(DEBUG, TAG, "CAPrepareSendData IN");
 897
 898     CAData_t *cadata = (CAData_t *) OICCalloc(1, sizeof(CAData_t));
 899     if (!cadata)
 900     {
 901         OIC_LOG(ERROR, TAG, "memory allocation failed");
 902         return NULL;
 903     }
 904
 905     if(CA_REQUEST_DATA == dataType)
 906     {
 907         // clone request info
 908         CARequestInfo_t *request = CACloneRequestInfo((CARequestInfo_t *)sendData);
 909
 910         if(!request)
 911         {
 912             OIC_LOG(ERROR, TAG, "CACloneRequestInfo failed");
 913             goto exit;
 914         }
 915
 916         cadata->type = request->isMulticast ? SEND_TYPE_MULTICAST : SEND_TYPE_UNICAST;
 917         cadata->requestInfo =  request;
 918     }
 919     else if(CA_RESPONSE_DATA == dataType)
 920     {
 921         // clone response info
 922         CAResponseInfo_t *response = CACloneResponseInfo((CAResponseInfo_t *)sendData);
 923
 924         if(!response)
 925         {
 926             OIC_LOG(ERROR, TAG, "CACloneResponseInfo failed");
 927             goto exit;
 928         }
 929
 930         cadata->type = response->isMulticast ? SEND_TYPE_MULTICAST : SEND_TYPE_UNICAST;
 931         cadata->responseInfo = response;
 932     }
 933     else
 934     {
 935         OIC_LOG(ERROR, TAG, "CAPrepareSendData unknown data type");
 936         goto exit;
 937     }
 938
 939     CAEndpoint_t* ep = CACloneEndpoint(endpoint);
 940     if (!ep)
 941     {
 942         OIC_LOG(ERROR, TAG, "endpoint clone failed");
 943         CADestroyData(cadata, sizeof(CAData_t));
 944         return NULL;
 945     }
 946
 947     cadata->remoteEndpoint = ep;
 948     cadata->dataType = dataType;
 949     return cadata;
 950
 951 exit:
 952     OICFree(cadata);
 953     return NULL;
 954 }
 955
 956 CAResult_t CADetachSendMessage(const CAEndpoint_t *endpoint, const void *sendMsg,
 957                                CADataType_t dataType)
 958 {
 959     VERIFY_NON_NULL(endpoint, TAG, "endpoint");
 960     VERIFY_NON_NULL(sendMsg, TAG, "sendMsg");
 961
 962     if (false == CAIsSelectedNetworkAvailable())
 963     {
 964         return CA_STATUS_FAILED;
 965     }
 966
 967 #ifdef ARDUINO
 968     // If max retransmission queue is reached, then don't handle new request
 969     if (CA_MAX_RT_ARRAY_SIZE == u_arraylist_length(g_retransmissionContext.dataList))
 970     {
 971         OIC_LOG(ERROR, TAG, "max RT queue size reached!");
 972         return CA_SEND_FAILED;
 973     }
 974 #endif // ARDUINO
 975
 976     CAData_t *data = CAPrepareSendData(endpoint, sendMsg, dataType);
 977     if(!data)
 978     {
 979         OIC_LOG(ERROR, TAG, "CAPrepareSendData failed");
 980         return CA_MEMORY_ALLOC_FAILED;
 981     }
 982
 983 #ifdef SINGLE_THREAD
 984     CAResult_t result = CAProcessSendData(data);
 985     if(CA_STATUS_OK != result)
 986     {
 987         OIC_LOG(ERROR, TAG, "CAProcessSendData failed");
 988         CADestroyData(data, sizeof(CAData_t));
 989         return result;
 990     }
 991
 992     CADestroyData(data, sizeof(CAData_t));
 993 #else
 994 #ifdef WITH_BWT
 995     if (CAIsSupportedBlockwiseTransfer(endpoint->adapter))
 996     {
 997         // send block data
 998         CAResult_t res = CASendBlockWiseData(data);
 999         if(CA_NOT_SUPPORTED == res)
1000         {
1001             OIC_LOG(DEBUG, TAG, "normal msg will be sent");
1002             CAQueueingThreadAddData(&g_sendThread, data, sizeof(CAData_t));
1003             return CA_STATUS_OK;
1004         }
1005         else
1006         {
1007             CADestroyData(data, sizeof(CAData_t));
1008         }
1009         return res;
1010     }
1011     else
1012 #endif // WITH_BWT
1013     {
1014         CAQueueingThreadAddData(&g_sendThread, data, sizeof(CAData_t));
1015     }
1016 #endif // SINGLE_THREAD
1017
1018     return CA_STATUS_OK;
1019 }
1020
1021 void CASetInterfaceCallbacks(CARequestCallback ReqHandler, CAResponseCallback RespHandler,
1022                              CAErrorCallback errorHandler)
1023 {
1024     g_requestHandler = ReqHandler;
1025     g_responseHandler = RespHandler;
1026     g_errorHandler = errorHandler;
1027 }
1028
1029 void CASetNetworkMonitorCallback(CANetworkMonitorCallback nwMonitorHandler)
1030 {
1031     g_nwMonitorHandler = nwMonitorHandler;
1032 }
1033
1034 CAResult_t CAInitializeMessageHandler()
1035 {
1036     CASetPacketReceivedCallback(CAReceivedPacketCallback);
1037     CASetErrorHandleCallback(CAErrorHandler);
1038
1039 #ifndef SINGLE_THREAD
1040     // create thread pool
1041     CAResult_t res = ca_thread_pool_init(MAX_THREAD_POOL_SIZE, &g_threadPoolHandle);
1042     if (CA_STATUS_OK != res)
1043     {
1044         OIC_LOG(ERROR, TAG, "thread pool initialize error.");
1045         return res;
1046     }
1047
1048     // send thread initialize
1049     res = CAQueueingThreadInitialize(&g_sendThread, g_threadPoolHandle,
1050                                      CASendThreadProcess, CADestroyData);
1051     if (CA_STATUS_OK != res)
1052     {
1053         OIC_LOG(ERROR, TAG, "Failed to Initialize send queue thread");
1054         ca_thread_pool_free(g_threadPoolHandle);
1055         g_threadPoolHandle = NULL;
1056         return res;
1057     }
1058
1059     // start send thread
1060     res = CAQueueingThreadStart(&g_sendThread);
1061     if (CA_STATUS_OK != res)
1062     {
1063         OIC_LOG(ERROR, TAG, "thread start error(send thread).");
1064         ca_thread_pool_free(g_threadPoolHandle);
1065         g_threadPoolHandle = NULL;
1066         CAQueueingThreadDestroy(&g_sendThread);
1067         return res;
1068     }
1069
1070     // receive thread initialize
1071     res = CAQueueingThreadInitialize(&g_receiveThread, g_threadPoolHandle,
1072                                      CAReceiveThreadProcess, CADestroyData);
1073     if (CA_STATUS_OK != res)
1074     {
1075         OIC_LOG(ERROR, TAG, "Failed to Initialize receive queue thread");
1076         ca_thread_pool_free(g_threadPoolHandle);
1077         g_threadPoolHandle = NULL;
1078         CAQueueingThreadDestroy(&g_sendThread);
1079         return res;
1080     }
1081
1082 #ifndef SINGLE_HANDLE // This will be enabled when RI supports multi threading
1083     // start receive thread
1084     res = CAQueueingThreadStart(&g_receiveThread);
1085     if (CA_STATUS_OK != res)
1086     {
1087         OIC_LOG(ERROR, TAG, "thread start error(receive thread).");
1088         ca_thread_pool_free(g_threadPoolHandle);
1089         g_threadPoolHandle = NULL;
1090         CAQueueingThreadDestroy(&g_sendThread);
1091         CAQueueingThreadDestroy(&g_receiveThread);
1092         return res;
1093     }
1094 #endif // SINGLE_HANDLE
1095
1096     // retransmission initialize
1097     res = CARetransmissionInitialize(&g_retransmissionContext, g_threadPoolHandle,
1098                                      CASendUnicastData, CATimeoutCallback, NULL);
1099     if (CA_STATUS_OK != res)
1100     {
1101         OIC_LOG(ERROR, TAG, "Failed to Initialize Retransmission.");
1102         ca_thread_pool_free(g_threadPoolHandle);
1103         g_threadPoolHandle = NULL;
1104         CAQueueingThreadDestroy(&g_sendThread);
1105         CAQueueingThreadDestroy(&g_receiveThread);
1106         return res;
1107     }
1108
1109 #ifdef WITH_BWT
1110     // block-wise transfer initialize
1111     res = CAInitializeBlockWiseTransfer(CAAddDataToSendThread, CAAddDataToReceiveThread);
1112     if (CA_STATUS_OK != res)
1113     {
1114         OIC_LOG(ERROR, TAG, "Failed to Initialize BlockWiseTransfer.");
1115         ca_thread_pool_free(g_threadPoolHandle);
1116         g_threadPoolHandle = NULL;
1117         CAQueueingThreadDestroy(&g_sendThread);
1118         CAQueueingThreadDestroy(&g_receiveThread);
1119         CARetransmissionDestroy(&g_retransmissionContext);
1120         return res;
1121     }
1122 #endif
1123
1124     // start retransmission
1125     res = CARetransmissionStart(&g_retransmissionContext);
1126     if (CA_STATUS_OK != res)
1127     {
1128         OIC_LOG(ERROR, TAG, "thread start error(retransmission thread).");
1129         ca_thread_pool_free(g_threadPoolHandle);
1130         g_threadPoolHandle = NULL;
1131         CAQueueingThreadDestroy(&g_sendThread);
1132         CAQueueingThreadDestroy(&g_receiveThread);
1133         CARetransmissionDestroy(&g_retransmissionContext);
1134         return res;
1135     }
1136
1137     // initialize interface adapters by controller
1138     CAInitializeAdapters(g_threadPoolHandle);
1139 #else
1140     // retransmission initialize
1141     CAResult_t res = CARetransmissionInitialize(&g_retransmissionContext, NULL, CASendUnicastData,
1142                                                 CATimeoutCallback, NULL);
1143     if (CA_STATUS_OK != res)
1144     {
1145         OIC_LOG(ERROR, TAG, "Failed to Initialize Retransmission.");
1146         return res;
1147     }
1148
1149     CAInitializeAdapters();
1150 #endif // SINGLE_THREAD
1151
1152     return CA_STATUS_OK;
1153 }
1154
1155 void CATerminateMessageHandler()
1156 {
1157 #ifndef SINGLE_THREAD
1158     CATransportAdapter_t connType;
1159     u_arraylist_t *list = CAGetSelectedNetworkList();
1160     uint32_t length = u_arraylist_length(list);
1161
1162     uint32_t i = 0;
1163     for (i = 0; i < length; i++)
1164     {
1165         void* ptrType = u_arraylist_get(list, i);
1166
1167         if (NULL == ptrType)
1168         {
1169             continue;
1170         }
1171
1172         connType = *(CATransportAdapter_t *)ptrType;
1173         CAStopAdapter(connType);
1174     }
1175
1176     // stop retransmission
1177     if (NULL != g_retransmissionContext.threadMutex)
1178     {
1179         CARetransmissionStop(&g_retransmissionContext);
1180     }
1181
1182     // stop thread
1183     // delete thread data
1184     if (NULL != g_sendThread.threadMutex)
1185     {
1186         CAQueueingThreadStop(&g_sendThread);
1187     }
1188
1189     // stop thread
1190     // delete thread data
1191     if (NULL != g_receiveThread.threadMutex)
1192     {
1193 #ifndef SINGLE_HANDLE // This will be enabled when RI supports multi threading
1194         CAQueueingThreadStop(&g_receiveThread);
1195 #endif
1196     }
1197
1198     // destroy thread pool
1199     if (NULL != g_threadPoolHandle)
1200     {
1201         ca_thread_pool_free(g_threadPoolHandle);
1202         g_threadPoolHandle = NULL;
1203     }
1204
1205 #ifdef WITH_BWT
1206     CATerminateBlockWiseTransfer();
1207 #endif
1208     CARetransmissionDestroy(&g_retransmissionContext);
1209     CAQueueingThreadDestroy(&g_sendThread);
1210     CAQueueingThreadDestroy(&g_receiveThread);
1211
1212     // terminate interface adapters by controller
1213     CATerminateAdapters();
1214 #else
1215     // terminate interface adapters by controller
1216     CATerminateAdapters();
1217
1218     // stop retransmission
1219     CARetransmissionStop(&g_retransmissionContext);
1220     CARetransmissionDestroy(&g_retransmissionContext);
1221 #endif // SINGLE_THREAD
1222 }
1223
1224 void CALogPDUInfo(coap_pdu_t *pdu, const CAEndpoint_t *endpoint)
1225 {
1226     VERIFY_NON_NULL_VOID(pdu, TAG, "pdu");
1227     VERIFY_NON_NULL_VOID(endpoint, TAG, "endpoint");
1228
1229     OIC_LOG_V(DEBUG, TAG, "PDU Maker - payload : %s", pdu->data);
1230
1231 #ifdef WITH_TCP
1232     if (CAIsSupportedCoAPOverTCP(endpoint->adapter))
1233     {
1234         OIC_LOG(DEBUG, TAG, "pdu header data :");
1235         OIC_LOG_BUFFER(DEBUG, TAG,  (const uint8_t *) pdu->hdr, pdu->length);
1236     }
1237     else
1238 #endif
1239     {
1240         OIC_LOG_V(DEBUG, TAG, "PDU Maker - type : %d", pdu->hdr->coap_hdr_udp_t.type);
1241
1242         OIC_LOG_V(DEBUG, TAG, "PDU Maker - code : %d", pdu->hdr->coap_hdr_udp_t.code);
1243
1244         OIC_LOG(DEBUG, TAG, "PDU Maker - token :");
1245
1246         OIC_LOG_BUFFER(DEBUG, TAG, pdu->hdr->coap_hdr_udp_t.token,
1247                        pdu->hdr->coap_hdr_udp_t.token_length);
1248     }
1249 }
1250
1251 static void CALogPayloadInfo(CAInfo_t *info)
1252 {
1253     if(info)
1254     {
1255         if (info->options)
1256         {
1257             for (uint32_t i = 0; i < info->numOptions; i++)
1258             {
1259                 OIC_LOG_V(DEBUG, TAG, "optionID: %u", info->options[i].optionID);
1260
1261                 OIC_LOG_V(DEBUG, TAG, "list: %s", info->options[i].optionData);
1262             }
1263         }
1264
1265         if (info->payload)
1266         {
1267             OIC_LOG_V(DEBUG, TAG, "payload: %p(%zu)", info->payload,
1268                       info->payloadSize);
1269         }
1270
1271         if (info->token)
1272         {
1273             OIC_LOG(DEBUG, TAG, "token:");
1274             OIC_LOG_BUFFER(DEBUG, TAG, (const uint8_t *) info->token,
1275                            info->tokenLength);
1276         }
1277         OIC_LOG_V(DEBUG, TAG, "msgID: %u", info->messageId);
1278     }
1279     else
1280     {
1281         OIC_LOG(DEBUG, TAG, "info is NULL, cannot output log data");
1282     }
1283 }
1284
1285 void CAErrorHandler(const CAEndpoint_t *endpoint,
1286                     const void *data, uint32_t dataLen,
1287                     CAResult_t result)
1288 {
1289     OIC_LOG(DEBUG, TAG, "CAErrorHandler IN");
1290
1291 #ifndef SINGLE_THREAD
1292     VERIFY_NON_NULL_VOID(endpoint, TAG, "remoteEndpoint");
1293     VERIFY_NON_NULL_VOID(data, TAG, "data");
1294
1295     uint32_t code = CA_NOT_FOUND;
1296     //Do not free remoteEndpoint and data. Currently they will be freed in data thread
1297     //Get PDU data
1298     coap_pdu_t *pdu = (coap_pdu_t *)CAParsePDU((const char *)data, dataLen, &code, endpoint);
1299     if (NULL == pdu)
1300     {
1301         OIC_LOG(ERROR, TAG, "Parse PDU failed");
1302         return;
1303     }
1304
1305     CAData_t *cadata = CAGenerateHandlerData(endpoint, NULL, pdu, CA_ERROR_DATA);
1306     if(!cadata)
1307     {
1308         OIC_LOG(ERROR, TAG, "CAErrorHandler, CAGenerateHandlerData failed!");
1309         coap_delete_pdu(pdu);
1310         return;
1311     }
1312
1313     cadata->errorInfo->result = result;
1314
1315     CAQueueingThreadAddData(&g_receiveThread, cadata, sizeof(CAData_t));
1316     coap_delete_pdu(pdu);
1317 #endif
1318
1319     OIC_LOG(DEBUG, TAG, "CAErrorHandler OUT");
1320     return;
1321 }
1322
1323 static void CASendErrorInfo(const CAEndpoint_t *endpoint, const CAInfo_t *info, CAResult_t result)
1324 {
1325     OIC_LOG(DEBUG, TAG, "CASendErrorInfo IN");
1326 #ifndef SINGLE_THREAD
1327     CAData_t *cadata = (CAData_t *) OICCalloc(1, sizeof(CAData_t));
1328     if (!cadata)
1329     {
1330         OIC_LOG(ERROR, TAG, "cadata memory allocation failed");
1331         return;
1332     }
1333
1334     CAEndpoint_t* ep = CACloneEndpoint(endpoint);
1335     if (!ep)
1336     {
1337         OIC_LOG(ERROR, TAG, "endpoint clone failed");
1338         OICFree(cadata);
1339         return;
1340     }
1341
1342     CAErrorInfo_t *errorInfo = (CAErrorInfo_t *)OICCalloc(1, sizeof (CAErrorInfo_t));
1343     if (!errorInfo)
1344     {
1345         OIC_LOG(ERROR, TAG, "errorInfo memory allocation failed");
1346         OICFree(cadata);
1347         CAFreeEndpoint(ep);
1348         return;
1349     }
1350
1351     CAResult_t res = CACloneInfo(info, &errorInfo->info);
1352     if (CA_STATUS_OK != res)
1353     {
1354         OIC_LOG(ERROR, TAG, "info clone failed");
1355         OICFree(cadata);
1356         OICFree(errorInfo);
1357         CAFreeEndpoint(ep);
1358         return;
1359     }
1360
1361     errorInfo->result = result;
1362     cadata->remoteEndpoint = ep;
1363     cadata->errorInfo = errorInfo;
1364     cadata->dataType = CA_ERROR_DATA;
1365
1366     CAQueueingThreadAddData(&g_receiveThread, cadata, sizeof(CAData_t));
1367 #endif
1368     OIC_LOG(DEBUG, TAG, "CASendErrorInfo OUT");
1369 }