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