resource/csdk/connectivity/src/camessagehandler.c

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