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