resource/csdk/connectivity/src/camessagehandler.c

   1 /* *****************************************************************
   2  *
   3  * Copyright 2014 Samsung Electronics All Rights Reserved.
   4  *
   5  *
   6  *
   7  * Licensed under the Apache License, Version 2.0 (the "License");
   8  * you may not use this file except in compliance with the License.
   9  * You may obtain a copy of the License at
  10  *
  11  *      http://www.apache.org/licenses/LICENSE-2.0
  12  *
  13  * Unless required by applicable law or agreed to in writing, software
  14  * distributed under the License is distributed on an "AS IS" BASIS,
  15  * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
  16  * See the License for the specific language governing permissions and
  17  * limitations under the License.
  18  *
  19  ******************************************************************/
  20
  21 #include <stdio.h>
  22 #include <stdlib.h>
  23 #include <string.h>
  24 #include <stdint.h>
  25
  26 #include "cainterface.h"
  27 #include "camessagehandler.h"
  28 #include "caremotehandler.h"
  29 #include "caprotocolmessage.h"
  30 #include "logger.h"
  31 #include "config.h" /* for coap protocol */
  32 #include "oic_malloc.h"
  33 #include "canetworkconfigurator.h"
  34 #include "caadapterutils.h"
  35 #include "cainterfacecontroller.h"
  36 #include "caretransmission.h"
  37
  38 #ifdef WITH_BWT
  39 #include "cablockwisetransfer.h"
  40 #endif
  41
  42 #ifndef  SINGLE_THREAD
  43 #include "uqueue.h"
  44 #include "cathreadpool.h" /* for thread pool */
  45 #include "caqueueingthread.h"
  46
  47 #define SINGLE_HANDLE
  48 #define MAX_THREAD_POOL_SIZE    20
  49
  50 // thread pool handle
  51 static ca_thread_pool_t g_threadPoolHandle = NULL;
  52
  53 // message handler main thread
  54 static CAQueueingThread_t g_sendThread;
  55 static CAQueueingThread_t g_receiveThread;
  56
  57 #else
  58 #define CA_MAX_RT_ARRAY_SIZE    3
  59 #endif  // SINGLE_THREAD
  60
  61 #define TAG "OIC_CA_MSG_HANDLE"
  62
  63 static CARetransmission_t g_retransmissionContext;
  64
  65 // handler field
  66 static CARequestCallback g_requestHandler = NULL;
  67 static CAResponseCallback g_responseHandler = NULL;
  68 static CAErrorCallback g_errorHandler = NULL;
  69 static CANetworkMonitorCallback g_nwMonitorHandler = NULL;
  70
  71 static void CAErrorHandler(const CAEndpoint_t *endpoint,
  72                            const void *data, uint32_t dataLen,
  73                            CAResult_t result);
  74
  75 static CAData_t* CAGenerateHandlerData(const CAEndpoint_t *endpoint,
  76                                        const CARemoteId_t *identity,
  77                                        const void *data, CADataType_t dataType);
  78
  79 static void CASendErrorInfo(const CAEndpoint_t *endpoint, const CAInfo_t *info,
  80                             CAResult_t result);
  81
  82 #ifdef SINGLE_THREAD
  83 static void CAProcessReceivedData(CAData_t *data);
  84 #endif
  85 static void CADestroyData(void *data, uint32_t size);
  86 static void CALogPayloadInfo(CAInfo_t *info);
  87 static bool CADropSecondMessage(CAHistory_t *history, const CAEndpoint_t *endpoint, uint16_t id,
  88                                 CAToken_t token, uint8_t tokenLength);
  89
  90 #ifdef WITH_BWT
  91 void CAAddDataToSendThread(CAData_t *data)
  92 {
  93     VERIFY_NON_NULL_VOID(data, TAG, "data");
  94
  95     // add thread
  96     CAQueueingThreadAddData(&g_sendThread, data, sizeof(CAData_t));
  97 }
  98
  99 void CAAddDataToReceiveThread(CAData_t *data)
 100 {
 101     VERIFY_NON_NULL_VOID(data, TAG, "data");
 102
 103     // add thread
 104     CAQueueingThreadAddData(&g_receiveThread, data, sizeof(CAData_t));
 105 }
 106 #endif
 107
 108 static bool CAIsSelectedNetworkAvailable()
 109 {
 110     u_arraylist_t *list = CAGetSelectedNetworkList();
 111     if (!list || u_arraylist_length(list) == 0)
 112     {
 113         OIC_LOG(ERROR, TAG, "No selected network");
 114         return false;
 115     }
 116
 117     return true;
 118 }
 119
 120 static CAData_t* CAGenerateHandlerData(const CAEndpoint_t *endpoint,
 121                                        const CARemoteId_t *identity,
 122                                        const void *data, CADataType_t dataType)
 123 {
 124     OIC_LOG(DEBUG, TAG, "CAGenerateHandlerData IN");
 125     CAInfo_t *info = NULL;
 126     CAData_t *cadata = (CAData_t *) OICCalloc(1, sizeof(CAData_t));
 127     if (!cadata)
 128     {
 129         OIC_LOG(ERROR, TAG, "memory allocation failed");
 130         return NULL;
 131     }
 132
 133     CAEndpoint_t* ep = CACloneEndpoint(endpoint);
 134     if (!ep)
 135     {
 136         OIC_LOG(ERROR, TAG, "endpoint clone failed");
 137         OICFree(cadata);
 138         return NULL;
 139     }
 140
 141     OIC_LOG_V(DEBUG, TAG, "address : %s", ep->addr);
 142     CAResult_t result;
 143
 144     if(CA_RESPONSE_DATA == dataType)
 145     {
 146         CAResponseInfo_t* resInfo = (CAResponseInfo_t*)OICCalloc(1, sizeof(CAResponseInfo_t));
 147         if (!resInfo)
 148         {
 149             OIC_LOG(ERROR, TAG, "memory allocation failed");
 150             OICFree(cadata);
 151             CAFreeEndpoint(ep);
 152             return NULL;
 153         }
 154
 155         result = CAGetResponseInfoFromPDU(data, resInfo, endpoint);
 156         if (CA_STATUS_OK != result)
 157         {
 158             OIC_LOG(ERROR, TAG, "CAGetResponseInfoFromPDU Failed");
 159             CAFreeEndpoint(ep);
 160             CADestroyResponseInfoInternal(resInfo);
 161             OICFree(cadata);
 162             return NULL;
 163         }
 164         cadata->responseInfo = resInfo;
 165         info = &resInfo->info;
 166         if (identity)
 167         {
 168             info->identity = *identity;
 169         }
 170         OIC_LOG(DEBUG, TAG, "Response Info :");
 171         CALogPayloadInfo(info);
 172     }
 173     else if (CA_REQUEST_DATA == dataType)
 174     {
 175         CARequestInfo_t* reqInfo = (CARequestInfo_t*)OICCalloc(1, sizeof(CARequestInfo_t));
 176         if (!reqInfo)
 177         {
 178             OIC_LOG(ERROR, TAG, "memory allocation failed");
 179             OICFree(cadata);
 180             CAFreeEndpoint(ep);
 181             return NULL;
 182         }
 183
 184         result = CAGetRequestInfoFromPDU(data, endpoint, reqInfo);
 185         if (CA_STATUS_OK != result)
 186         {
 187             OIC_LOG(ERROR, TAG, "CAGetRequestInfoFromPDU failed");
 188             CAFreeEndpoint(ep);
 189             CADestroyRequestInfoInternal(reqInfo);
 190             OICFree(cadata);
 191             return NULL;
 192         }
 193
 194         if (CADropSecondMessage(&caglobals.ca.requestHistory, endpoint, reqInfo->info.messageId,
 195                                 reqInfo->info.token, reqInfo->info.tokenLength))
 196         {
 197             OIC_LOG(ERROR, TAG, "Second Request with same Token, Drop it");
 198             CAFreeEndpoint(ep);
 199             CADestroyRequestInfoInternal(reqInfo);
 200             OICFree(cadata);
 201             return NULL;
 202         }
 203
 204         cadata->requestInfo = reqInfo;
 205         info = &reqInfo->info;
 206         if (identity)
 207         {
 208             info->identity = *identity;
 209         }
 210         OIC_LOG(DEBUG, TAG, "Request Info :");
 211         CALogPayloadInfo(info);
 212    }
 213     else if (CA_ERROR_DATA == dataType)
 214     {
 215         CAErrorInfo_t *errorInfo = (CAErrorInfo_t *)OICCalloc(1, sizeof (CAErrorInfo_t));
 216         if (!errorInfo)
 217         {
 218             OIC_LOG(ERROR, TAG, "Memory allocation failed!");
 219             OICFree(cadata);
 220             CAFreeEndpoint(ep);
 221             return NULL;
 222         }
 223
 224         CAResult_t result = CAGetErrorInfoFromPDU(data, endpoint, errorInfo);
 225         if (CA_STATUS_OK != result)
 226         {
 227             OIC_LOG(ERROR, TAG, "CAGetErrorInfoFromPDU failed");
 228             CAFreeEndpoint(ep);
 229             OICFree(errorInfo);
 230             OICFree(cadata);
 231             return NULL;
 232         }
 233
 234         cadata->errorInfo = errorInfo;
 235         info = &errorInfo->info;
 236         if (identity)
 237         {
 238             info->identity = *identity;
 239         }
 240         OIC_LOG(DEBUG, TAG, "error Info :");
 241         CALogPayloadInfo(info);
 242     }
 243
 244     cadata->remoteEndpoint = ep;
 245     cadata->dataType = dataType;
 246
 247     OIC_LOG(DEBUG, TAG, "CAGenerateHandlerData OUT");
 248     return cadata;
 249 }
 250
 251 static void CATimeoutCallback(const CAEndpoint_t *endpoint, const void *pdu, uint32_t size)
 252 {
 253     VERIFY_NON_NULL_VOID(endpoint, TAG, "endpoint");
 254     VERIFY_NON_NULL_VOID(pdu, TAG, "pdu");
 255
 256     CAEndpoint_t* ep = CACloneEndpoint(endpoint);
 257     if (!ep)
 258     {
 259         OIC_LOG(ERROR, TAG, "clone failed");
 260         return;
 261     }
 262
 263     CAResponseInfo_t* resInfo = (CAResponseInfo_t*)OICCalloc(1, sizeof(CAResponseInfo_t));
 264
 265     if (!resInfo)
 266     {
 267         OIC_LOG(ERROR, TAG, "calloc failed");
 268         CAFreeEndpoint(ep);
 269         return;
 270     }
 271
 272     resInfo->result = CA_RETRANSMIT_TIMEOUT;
 273     resInfo->info.type = CAGetMessageTypeFromPduBinaryData(pdu, size);
 274     resInfo->info.messageId = CAGetMessageIdFromPduBinaryData(pdu, size);
 275
 276     CAResult_t res = CAGetTokenFromPDU((const coap_hdr_t *) pdu, &(resInfo->info),
 277                                        endpoint);
 278     if (CA_STATUS_OK != res)
 279     {
 280         OIC_LOG(ERROR, TAG, "fail to get Token from retransmission list");
 281         CADestroyResponseInfoInternal(resInfo);
 282         CAFreeEndpoint(ep);
 283         return;
 284     }
 285
 286     CAData_t *cadata = (CAData_t *) OICCalloc(1, sizeof(CAData_t));
 287     if (NULL == cadata)
 288     {
 289         OIC_LOG(ERROR, TAG, "memory allocation failed !");
 290         CAFreeEndpoint(ep);
 291         CADestroyResponseInfoInternal(resInfo);
 292         return;
 293     }
 294
 295     cadata->type = SEND_TYPE_UNICAST;
 296     cadata->remoteEndpoint = ep;
 297     cadata->requestInfo = NULL;
 298     cadata->responseInfo = resInfo;
 299
 300 #ifdef SINGLE_THREAD
 301     CAProcessReceivedData(cadata);
 302 #else
 303     CAQueueingThreadAddData(&g_receiveThread, cadata, sizeof(CAData_t));
 304 #endif
 305 }
 306
 307 static void CADestroyData(void *data, uint32_t size)
 308 {
 309     OIC_LOG(DEBUG, TAG, "CADestroyData IN");
 310     if ((size_t)size < sizeof(CAData_t))
 311     {
 312         OIC_LOG_V(ERROR, TAG, "Destroy data too small %p %d", data, size);
 313     }
 314     CAData_t *cadata = (CAData_t *) data;
 315
 316     if (NULL == cadata)
 317     {
 318         OIC_LOG(ERROR, TAG, "cadata is NULL");
 319         return;
 320     }
 321
 322     if (NULL != cadata->remoteEndpoint)
 323     {
 324         CAFreeEndpoint(cadata->remoteEndpoint);
 325     }
 326
 327     if (NULL != cadata->requestInfo)
 328     {
 329         CADestroyRequestInfoInternal((CARequestInfo_t *) cadata->requestInfo);
 330     }
 331
 332     if (NULL != cadata->responseInfo)
 333     {
 334         CADestroyResponseInfoInternal((CAResponseInfo_t *) cadata->responseInfo);
 335     }
 336
 337     if (NULL != cadata->errorInfo)
 338     {
 339         CADestroyErrorInfoInternal(cadata->errorInfo);
 340     }
 341
 342     OICFree(cadata);
 343     OIC_LOG(DEBUG, TAG, "CADestroyData OUT");
 344 }
 345
 346 #ifdef SINGLE_THREAD
 347 static void CAProcessReceivedData(CAData_t *data)
 348 {
 349     OIC_LOG(DEBUG, TAG, "CAProcessReceivedData IN");
 350     if (!data)
 351     {
 352         OIC_LOG(ERROR, TAG, "thread data error!!");
 353         return;
 354     }
 355
 356     // parse the data and call the callbacks.
 357     // #1 parse the data
 358     // #2 get endpoint
 359     CAEndpoint_t *rep = (CAEndpoint_t *)(data->remoteEndpoint);
 360     if (!rep)
 361     {
 362         OIC_LOG(ERROR, TAG, "remoteEndpoint error!!");
 363         return;
 364     }
 365
 366     if (data->requestInfo && g_requestHandler)
 367     {
 368         g_requestHandler(rep, data->requestInfo);
 369     }
 370     else if (data->responseInfo && g_responseHandler)
 371     {
 372         g_responseHandler(rep, data->responseInfo);
 373     }
 374     else if (data->errorInfo && g_errorHandler)
 375     {
 376         g_errorHandler(rep, data->errorInfo);
 377     }
 378
 379     CADestroyData(data, sizeof(CAData_t));
 380
 381     OIC_LOG(DEBUG, TAG, "CAProcessReceivedData OUT");
 382 }
 383 #endif
 384
 385 #ifndef SINGLE_THREAD
 386 static void CAReceiveThreadProcess(void *threadData)
 387 {
 388 #ifndef SINGLE_HANDLE
 389     CAData_t *data = (CAData_t *) threadData;
 390     CAProcessReceivedData(data);
 391 #else
 392     (void)threadData;
 393 #endif
 394 }
 395 #endif // SINGLE_THREAD
 396
 397 static CAResult_t CAProcessMulticastData(const CAData_t *data)
 398 {
 399     VERIFY_NON_NULL(data, TAG, "data");
 400     VERIFY_NON_NULL(data->remoteEndpoint, TAG, "remoteEndpoint");
 401
 402     coap_pdu_t *pdu = NULL;
 403     CAInfo_t *info = NULL;
 404     coap_list_t *options = NULL;
 405     coap_transport_type transport;
 406     CAResult_t res = CA_SEND_FAILED;
 407     if (NULL != data->requestInfo)
 408     {
 409         OIC_LOG(DEBUG, TAG, "requestInfo is available..");
 410
 411         info = &data->requestInfo->info;
 412         pdu = CAGeneratePDU(CA_GET, info, data->remoteEndpoint, &options, &transport);
 413
 414         if (NULL != pdu)
 415         {
 416 #ifdef WITH_BWT
 417             if (CAIsSupportedBlockwiseTransfer(data->remoteEndpoint->adapter))
 418             {
 419                 // Blockwise transfer
 420                 res = CAAddBlockOption(&pdu, info, data->remoteEndpoint, &options);
 421                 if (CA_STATUS_OK != res)
 422                 {
 423                     OIC_LOG(DEBUG, TAG, "CAAddBlockOption has failed");
 424                     goto exit;
 425                 }
 426             }
 427 #endif // WITH_BWT
 428         }
 429         else
 430         {
 431             OIC_LOG(ERROR,TAG,"Failed to generate multicast PDU");
 432             CASendErrorInfo(data->remoteEndpoint, info, CA_SEND_FAILED);
 433             return res;
 434         }
 435     }
 436     else if (NULL != data->responseInfo)
 437     {
 438         OIC_LOG(DEBUG, TAG, "responseInfo is available..");
 439
 440         info = &data->responseInfo->info;
 441         pdu = CAGeneratePDU(data->responseInfo->result, info, data->remoteEndpoint,
 442                             &options, &transport);
 443
 444         if (NULL != pdu)
 445         {
 446 #ifdef WITH_BWT
 447             if (CAIsSupportedBlockwiseTransfer(data->remoteEndpoint->adapter))
 448             {
 449                 // Blockwise transfer
 450                 if (NULL != info)
 451                 {
 452                     res = CAAddBlockOption(&pdu, info, data->remoteEndpoint, &options);
 453                     if (CA_STATUS_OK != res)
 454                     {
 455                         OIC_LOG(INFO, TAG, "to write block option has failed");
 456                         goto exit;
 457                     }
 458                 }
 459             }
 460 #endif // WITH_BWT
 461         }
 462         else
 463         {
 464             OIC_LOG(ERROR,TAG,"Failed to generate multicast PDU");
 465             CASendErrorInfo(data->remoteEndpoint, info, CA_SEND_FAILED);
 466             return res;
 467         }
 468     }
 469     else
 470     {
 471         OIC_LOG(ERROR, TAG, "request or response info is empty");
 472         return res;
 473     }
 474
 475     CALogPDUInfo(pdu, data->remoteEndpoint);
 476
 477     OIC_LOG(DEBUG, TAG, "pdu to send :");
 478     OIC_LOG_BUFFER(DEBUG, TAG,  (uint8_t*)pdu->hdr, pdu->length);
 479
 480     res = CASendMulticastData(data->remoteEndpoint, pdu->hdr, pdu->length);
 481     if (CA_STATUS_OK != res)
 482     {
 483         OIC_LOG_V(ERROR, TAG, "send failed:%d", res);
 484         goto exit;
 485     }
 486
 487     coap_delete_list(options);
 488     coap_delete_pdu(pdu);
 489     return res;
 490
 491 exit:
 492     CAErrorHandler(data->remoteEndpoint, pdu->hdr, pdu->length, res);
 493     coap_delete_list(options);
 494     coap_delete_pdu(pdu);
 495     return res;
 496 }
 497
 498 static CAResult_t CAProcessSendData(const CAData_t *data)
 499 {
 500     VERIFY_NON_NULL(data, TAG, "data");
 501     VERIFY_NON_NULL(data->remoteEndpoint, TAG, "remoteEndpoint");
 502
 503     CAResult_t res = CA_STATUS_FAILED;
 504
 505     CASendDataType_t type = data->type;
 506
 507     coap_pdu_t *pdu = NULL;
 508     CAInfo_t *info = NULL;
 509     coap_list_t *options = NULL;
 510     coap_transport_type transport;
 511
 512     if (SEND_TYPE_UNICAST == type)
 513     {
 514         OIC_LOG(DEBUG,TAG,"Unicast message");
 515 #ifdef ROUTING_GATEWAY
 516         /*
 517          * When forwarding a packet, do not attempt retransmission as its the responsibility of
 518          * packet originator node
 519          */
 520         bool skipRetransmission = false;
 521 #endif
 522
 523         if (NULL != data->requestInfo)
 524         {
 525             OIC_LOG(DEBUG, TAG, "requestInfo is available..");
 526
 527             info = &data->requestInfo->info;
 528 #ifdef ROUTING_GATEWAY
 529             skipRetransmission = data->requestInfo->info.skipRetransmission;
 530 #endif
 531             pdu = CAGeneratePDU(data->requestInfo->method, info, data->remoteEndpoint,
 532                                 &options, &transport);
 533         }
 534         else if (NULL != data->responseInfo)
 535         {
 536             OIC_LOG(DEBUG, TAG, "responseInfo is available..");
 537
 538             info = &data->responseInfo->info;
 539 #ifdef ROUTING_GATEWAY
 540             skipRetransmission = data->responseInfo->info.skipRetransmission;
 541 #endif
 542             pdu = CAGeneratePDU(data->responseInfo->result, info, data->remoteEndpoint,
 543                                 &options, &transport);
 544         }
 545         else
 546         {
 547             OIC_LOG(DEBUG, TAG, "request info, response info is empty");
 548             return CA_STATUS_INVALID_PARAM;
 549         }
 550
 551         // interface controller function call.
 552         if (NULL != pdu)
 553         {
 554 #ifdef WITH_BWT
 555             if (CAIsSupportedBlockwiseTransfer(data->remoteEndpoint->adapter))
 556             {
 557                 // Blockwise transfer
 558                 if (NULL != info)
 559                 {
 560                     CAResult_t res = CAAddBlockOption(&pdu, info,
 561                                                       data->remoteEndpoint,
 562                                                       &options);
 563                     if (CA_STATUS_OK != res)
 564                     {
 565                         OIC_LOG(INFO, TAG, "to write block option has failed");
 566                         CAErrorHandler(data->remoteEndpoint, pdu->hdr, pdu->length, res);
 567                         coap_delete_list(options);
 568                         coap_delete_pdu(pdu);
 569                         return res;
 570                     }
 571                 }
 572             }
 573 #endif // WITH_BWT
 574             CALogPDUInfo(pdu, data->remoteEndpoint);
 575
 576             res = CASendUnicastData(data->remoteEndpoint, pdu->hdr, pdu->length);
 577             if (CA_STATUS_OK != res)
 578             {
 579                 OIC_LOG_V(ERROR, TAG, "send failed:%d", res);
 580                 CAErrorHandler(data->remoteEndpoint, pdu->hdr, pdu->length, res);
 581                 coap_delete_list(options);
 582                 coap_delete_pdu(pdu);
 583                 return res;
 584             }
 585
 586 #ifdef WITH_TCP
 587             if (CAIsSupportedCoAPOverTCP(data->remoteEndpoint->adapter))
 588             {
 589                 OIC_LOG(INFO, TAG, "retransmission will be not worked");
 590             }
 591             else
 592 #endif
 593 #ifdef ROUTING_GATEWAY
 594             if(!skipRetransmission)
 595 #endif
 596             {
 597                 // for retransmission
 598                 res = CARetransmissionSentData(&g_retransmissionContext, data->remoteEndpoint,
 599                                                pdu->hdr, pdu->length);
 600                 if ((CA_STATUS_OK != res) && (CA_NOT_SUPPORTED != res))
 601                 {
 602                     //when retransmission not supported this will return CA_NOT_SUPPORTED, ignore
 603                     OIC_LOG_V(INFO, TAG, "retransmission is not enabled due to error, res : %d", res);
 604                     coap_delete_list(options);
 605                     coap_delete_pdu(pdu);
 606                     return res;
 607                 }
 608             }
 609
 610             coap_delete_list(options);
 611             coap_delete_pdu(pdu);
 612         }
 613         else
 614         {
 615             OIC_LOG(ERROR,TAG,"Failed to generate unicast PDU");
 616             CASendErrorInfo(data->remoteEndpoint, info, CA_SEND_FAILED);
 617             return CA_SEND_FAILED;
 618         }
 619     }
 620     else if (SEND_TYPE_MULTICAST == type)
 621     {
 622         OIC_LOG(DEBUG,TAG,"Multicast message");
 623 #ifdef WITH_TCP
 624         /*
 625          * If CoAP over TCP is enabled, the CoAP pdu wont be same for IP and other adapters.
 626          * That's why we need to generate two pdu's, one for IP and second for other transports.
 627          * Two possible cases we might have to split: a) when adapter is CA_DEFAULT_ADAPTER
 628          * b) when one of the adapter is IP adapter(ex: CA_ADAPTER_IP | CA_ADAPTER_GATT_BTLE)
 629          */
 630         if (data->remoteEndpoint->adapter == CA_DEFAULT_ADAPTER ||
 631                 (CA_ADAPTER_IP & data->remoteEndpoint->adapter &&
 632                     CA_ADAPTER_IP != data->remoteEndpoint->adapter))
 633         {
 634             if (data->remoteEndpoint->adapter == CA_DEFAULT_ADAPTER)
 635             {
 636                 data->remoteEndpoint->adapter = CA_ALL_ADAPTERS ^ CA_ADAPTER_IP;
 637             }
 638             else
 639             {
 640                 data->remoteEndpoint->adapter = data->remoteEndpoint->adapter ^ CA_ADAPTER_IP;
 641             }
 642             CAProcessMulticastData(data);
 643             data->remoteEndpoint->adapter = CA_ADAPTER_IP;
 644             CAProcessMulticastData(data);
 645         }
 646         else
 647         {
 648             CAProcessMulticastData(data);
 649         }
 650 #else
 651         CAProcessMulticastData(data);
 652 #endif
 653     }
 654
 655     return CA_STATUS_OK;
 656 }
 657
 658 #ifndef SINGLE_THREAD
 659 static void CASendThreadProcess(void *threadData)
 660 {
 661     CAData_t *data = (CAData_t *) threadData;
 662     CAProcessSendData(data);
 663 }
 664 #endif
 665
 666 /*
 667  * If a second message arrives with the same message ID, token and the other address
 668  * family, drop it.  Typically, IPv6 beats IPv4, so the IPv4 message is dropped.
 669  */
 670 static bool CADropSecondMessage(CAHistory_t *history, const CAEndpoint_t *ep, uint16_t id,
 671                                 CAToken_t token, uint8_t tokenLength)
 672 {
 673     if (!ep)
 674     {
 675         return true;
 676     }
 677     if (ep->adapter != CA_ADAPTER_IP)
 678     {
 679         return false;
 680     }
 681     if (!caglobals.ip.dualstack)
 682     {
 683         return false;
 684     }
 685
 686     if (tokenLength > CA_MAX_TOKEN_LEN)
 687     {
 688         /*
 689          * If token length is more than CA_MAX_TOKEN_LEN,
 690          * we compare the first CA_MAX_TOKEN_LEN bytes only.
 691          */
 692         tokenLength = CA_MAX_TOKEN_LEN;
 693     }
 694
 695     bool ret = false;
 696     CATransportFlags_t familyFlags = ep->flags & CA_IPFAMILY_MASK;
 697
 698     for (size_t i = 0; i < sizeof(history->items) / sizeof(history->items[0]); i++)
 699     {
 700         CAHistoryItem_t *item = &(history->items[i]);
 701         if (id == item->messageId && tokenLength == item->tokenLength
 702             && memcmp(item->token, token, tokenLength) == 0)
 703         {
 704             if ((familyFlags ^ item->flags) == CA_IPFAMILY_MASK)
 705             {
 706                 OIC_LOG_V(INFO, TAG, "IPv%c duplicate message ignored",
 707                           familyFlags & CA_IPV6 ? '6' : '4');
 708                 ret = true;
 709                 break;
 710             }
 711         }
 712     }
 713
 714     history->items[history->nextIndex].flags = familyFlags;
 715     history->items[history->nextIndex].messageId = id;
 716     if (token && tokenLength)
 717     {
 718         memcpy(history->items[history->nextIndex].token, token, tokenLength);
 719         history->items[history->nextIndex].tokenLength = tokenLength;
 720     }
 721
 722     if (++history->nextIndex >= HISTORYSIZE)
 723     {
 724         history->nextIndex = 0;
 725     }
 726
 727     return ret;
 728 }
 729
 730 static void CAReceivedPacketCallback(const CASecureEndpoint_t *sep,
 731                                      const void *data, uint32_t dataLen)
 732 {
 733     VERIFY_NON_NULL_VOID(sep, TAG, "remoteEndpoint");
 734     VERIFY_NON_NULL_VOID(data, TAG, "data");
 735
 736     OIC_LOG(DEBUG, TAG, "received pdu data :");
 737     OIC_LOG_BUFFER(DEBUG, TAG,  data, dataLen);
 738
 739     uint32_t code = CA_NOT_FOUND;
 740     CAData_t *cadata = NULL;
 741
 742     coap_pdu_t *pdu = (coap_pdu_t *) CAParsePDU((const char *) data, dataLen, &code,
 743                                                 &(sep->endpoint));
 744     if (NULL == pdu)
 745     {
 746         OIC_LOG(ERROR, TAG, "Parse PDU failed");
 747         return;
 748     }
 749
 750     OIC_LOG_V(DEBUG, TAG, "code = %d", code);
 751     if (CA_GET == code || CA_POST == code || CA_PUT == code || CA_DELETE == code)
 752     {
 753         cadata = CAGenerateHandlerData(&(sep->endpoint), &(sep->identity), pdu, CA_REQUEST_DATA);
 754         if (!cadata)
 755         {
 756             OIC_LOG(ERROR, TAG, "CAReceivedPacketCallback, CAGenerateHandlerData failed!");
 757             coap_delete_pdu(pdu);
 758             return;
 759         }
 760     }
 761     else
 762     {
 763         cadata = CAGenerateHandlerData(&(sep->endpoint), &(sep->identity), pdu, CA_RESPONSE_DATA);
 764         if (!cadata)
 765         {
 766             OIC_LOG(ERROR, TAG, "CAReceivedPacketCallback, CAGenerateHandlerData failed!");
 767             coap_delete_pdu(pdu);
 768             return;
 769         }
 770
 771 #ifdef WITH_TCP
 772         if (CAIsSupportedCoAPOverTCP(sep->endpoint.adapter))
 773         {
 774             OIC_LOG(INFO, TAG, "retransmission is not supported");
 775         }
 776         else
 777 #endif
 778         {
 779             // for retransmission
 780             void *retransmissionPdu = NULL;
 781             CARetransmissionReceivedData(&g_retransmissionContext, cadata->remoteEndpoint, pdu->hdr,
 782                                          pdu->length, &retransmissionPdu);
 783
 784             // get token from saved data in retransmission list
 785             if (retransmissionPdu && CA_EMPTY == code)
 786             {
 787                 if (cadata->responseInfo)
 788                 {
 789                     CAInfo_t *info = &cadata->responseInfo->info;
 790                     CAResult_t res = CAGetTokenFromPDU((const coap_hdr_t *)retransmissionPdu,
 791                                                        info, &(sep->endpoint));
 792                     if (CA_STATUS_OK != res)
 793                     {
 794                         OIC_LOG(ERROR, TAG, "fail to get Token from retransmission list");
 795                         OICFree(info->token);
 796                         info->tokenLength = 0;
 797                     }
 798                 }
 799             }
 800             OICFree(retransmissionPdu);
 801         }
 802     }
 803
 804     cadata->type = SEND_TYPE_UNICAST;
 805
 806 #ifdef SINGLE_THREAD
 807     CAProcessReceivedData(cadata);
 808 #else
 809 #ifdef WITH_BWT
 810     if (CAIsSupportedBlockwiseTransfer(sep->endpoint.adapter))
 811     {
 812         CAResult_t res = CAReceiveBlockWiseData(pdu, &(sep->endpoint), cadata, dataLen);
 813         if (CA_NOT_SUPPORTED == res || CA_REQUEST_TIMEOUT == res)
 814         {
 815             OIC_LOG(ERROR, TAG, "this message does not have block option");
 816             CAQueueingThreadAddData(&g_receiveThread, cadata, sizeof(CAData_t));
 817         }
 818         else
 819         {
 820             CADestroyData(cadata, sizeof(CAData_t));
 821         }
 822     }
 823     else
 824 #endif
 825     {
 826         CAQueueingThreadAddData(&g_receiveThread, cadata, sizeof(CAData_t));
 827     }
 828 #endif // SINGLE_THREAD
 829
 830     coap_delete_pdu(pdu);
 831 }
 832
 833 void CAHandleRequestResponseCallbacks()
 834 {
 835 #ifdef SINGLE_THREAD
 836     CAReadData();
 837     CARetransmissionBaseRoutine((void *)&g_retransmissionContext);
 838 #else
 839 #ifdef SINGLE_HANDLE
 840     // parse the data and call the callbacks.
 841     // #1 parse the data
 842     // #2 get endpoint
 843
 844     ca_mutex_lock(g_receiveThread.threadMutex);
 845
 846     u_queue_message_t *item = u_queue_get_element(g_receiveThread.dataQueue);
 847
 848     ca_mutex_unlock(g_receiveThread.threadMutex);
 849
 850     if (NULL == item || NULL == item->msg)
 851     {
 852         return;
 853     }
 854
 855     // get endpoint
 856     CAData_t *td = (CAData_t *) item->msg;
 857
 858     if (td->requestInfo && g_requestHandler)
 859     {
 860         OIC_LOG_V(DEBUG, TAG, "request callback : %d", td->requestInfo->info.numOptions);
 861         g_requestHandler(td->remoteEndpoint, td->requestInfo);
 862     }
 863     else if (td->responseInfo && g_responseHandler)
 864     {
 865         OIC_LOG_V(DEBUG, TAG, "response callback : %d", td->responseInfo->info.numOptions);
 866         g_responseHandler(td->remoteEndpoint, td->responseInfo);
 867     }
 868     else if (td->errorInfo && g_errorHandler)
 869     {
 870         OIC_LOG_V(DEBUG, TAG, "error callback error: %d", td->errorInfo->result);
 871         g_errorHandler(td->remoteEndpoint, td->errorInfo);
 872     }
 873
 874     CADestroyData(item->msg, sizeof(CAData_t));
 875     OICFree(item);
 876
 877 #endif // SINGLE_HANDLE
 878 #endif // SINGLE_THREAD
 879 }
 880
 881 static CAData_t* CAPrepareSendData(const CAEndpoint_t *endpoint, const void *sendData,
 882                                    CADataType_t dataType)
 883 {
 884     OIC_LOG(DEBUG, TAG, "CAPrepareSendData IN");
 885
 886     CAData_t *cadata = (CAData_t *) OICCalloc(1, sizeof(CAData_t));
 887     if (!cadata)
 888     {
 889         OIC_LOG(ERROR, TAG, "memory allocation failed");
 890         return NULL;
 891     }
 892
 893     if(CA_REQUEST_DATA == dataType)
 894     {
 895         // clone request info
 896         CARequestInfo_t *request = CACloneRequestInfo((CARequestInfo_t *)sendData);
 897
 898         if(!request)
 899         {
 900             OIC_LOG(ERROR, TAG, "CACloneRequestInfo failed");
 901             goto exit;
 902         }
 903
 904         cadata->type = request->isMulticast ? SEND_TYPE_MULTICAST : SEND_TYPE_UNICAST;
 905         cadata->requestInfo =  request;
 906     }
 907     else if(CA_RESPONSE_DATA == dataType)
 908     {
 909         // clone response info
 910         CAResponseInfo_t *response = CACloneResponseInfo((CAResponseInfo_t *)sendData);
 911
 912         if(!response)
 913         {
 914             OIC_LOG(ERROR, TAG, "CACloneResponseInfo failed");
 915             goto exit;
 916         }
 917
 918         cadata->type = response->isMulticast ? SEND_TYPE_MULTICAST : SEND_TYPE_UNICAST;
 919         cadata->responseInfo = response;
 920     }
 921     else
 922     {
 923         OIC_LOG(ERROR, TAG, "CAPrepareSendData unknown data type");
 924         goto exit;
 925     }
 926
 927     CAEndpoint_t* ep = CACloneEndpoint(endpoint);
 928     if (!ep)
 929     {
 930         OIC_LOG(ERROR, TAG, "endpoint clone failed");
 931         CADestroyData(cadata, sizeof(CAData_t));
 932         return NULL;
 933     }
 934
 935     cadata->remoteEndpoint = ep;
 936     cadata->dataType = dataType;
 937     return cadata;
 938
 939 exit:
 940     OICFree(cadata);
 941     return NULL;
 942 }
 943
 944 CAResult_t CADetachSendMessage(const CAEndpoint_t *endpoint, const void *sendMsg,
 945                                CADataType_t dataType)
 946 {
 947     VERIFY_NON_NULL(endpoint, TAG, "endpoint");
 948     VERIFY_NON_NULL(sendMsg, TAG, "sendMsg");
 949
 950     if (false == CAIsSelectedNetworkAvailable())
 951     {
 952         return CA_STATUS_FAILED;
 953     }
 954
 955 #ifdef ARDUINO
 956     // If max retransmission queue is reached, then don't handle new request
 957     if (CA_MAX_RT_ARRAY_SIZE == u_arraylist_length(g_retransmissionContext.dataList))
 958     {
 959         OIC_LOG(ERROR, TAG, "max RT queue size reached!");
 960         return CA_SEND_FAILED;
 961     }
 962 #endif // ARDUINO
 963
 964     CAData_t *data = CAPrepareSendData(endpoint, sendMsg, dataType);
 965     if(!data)
 966     {
 967         OIC_LOG(ERROR, TAG, "CAPrepareSendData failed");
 968         return CA_MEMORY_ALLOC_FAILED;
 969     }
 970
 971 #ifdef SINGLE_THREAD
 972     CAResult_t result = CAProcessSendData(data);
 973     if(CA_STATUS_OK != result)
 974     {
 975         OIC_LOG(ERROR, TAG, "CAProcessSendData failed");
 976         CADestroyData(data, sizeof(CAData_t));
 977         return result;
 978     }
 979
 980     CADestroyData(data, sizeof(CAData_t));
 981 #else
 982 #ifdef WITH_BWT
 983     if (CAIsSupportedBlockwiseTransfer(endpoint->adapter))
 984     {
 985         // send block data
 986         CAResult_t res = CASendBlockWiseData(data);
 987         if(CA_NOT_SUPPORTED == res)
 988         {
 989             OIC_LOG(DEBUG, TAG, "normal msg will be sent");
 990             CAQueueingThreadAddData(&g_sendThread, data, sizeof(CAData_t));
 991             return CA_STATUS_OK;
 992         }
 993         else
 994         {
 995             CADestroyData(data, sizeof(CAData_t));
 996         }
 997         return res;
 998     }
 999     else
1000 #endif // WITH_BWT
1001     {
1002         CAQueueingThreadAddData(&g_sendThread, data, sizeof(CAData_t));
1003     }
1004 #endif // SINGLE_THREAD
1005
1006     return CA_STATUS_OK;
1007 }
1008
1009 void CASetInterfaceCallbacks(CARequestCallback ReqHandler, CAResponseCallback RespHandler,
1010                              CAErrorCallback errorHandler)
1011 {
1012     g_requestHandler = ReqHandler;
1013     g_responseHandler = RespHandler;
1014     g_errorHandler = errorHandler;
1015 }
1016
1017 void CASetNetworkMonitorCallback(CANetworkMonitorCallback nwMonitorHandler)
1018 {
1019     g_nwMonitorHandler = nwMonitorHandler;
1020 }
1021
1022 CAResult_t CAInitializeMessageHandler()
1023 {
1024     CASetPacketReceivedCallback(CAReceivedPacketCallback);
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 }