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 "CA_MSG_HNDLR"
  62
  63 static CARetransmission_t g_retransmissionContext;
  64
  65 // handler field
  66 static CARequestCallback g_requestHandler = NULL;
  67 static CAResponseCallback g_responseHandler = NULL;
  68 static CAErrorCallback g_errorHandler = NULL;
  69
  70 static void CAErrorHandler(const CAEndpoint_t *endpoint,
  71                            const void *data, uint32_t dataLen,
  72                            CAResult_t result);
  73
  74 static CAData_t* CAGenerateHandlerData(const CAEndpoint_t *endpoint,
  75                                        const CARemoteId_t *identity,
  76                                        const void *data, CADataType_t dataType);
  77
  78 static void CASendErrorInfo(const CAEndpoint_t *endpoint, const CAInfo_t *info,
  79                             CAResult_t result);
  80
  81 #ifdef SINGLE_THREAD
  82 static void CAProcessReceivedData(CAData_t *data);
  83 #endif
  84 static void CADestroyData(void *data, uint32_t size);
  85 static void CALogPayloadInfo(CAInfo_t *info);
  86 static bool CADropSecondMessage(CAHistory_t *history, const CAEndpoint_t *endpoint, uint16_t id,
  87                                 CAToken_t token, uint8_t tokenLength);
  88
  89 #ifdef WITH_BWT
  90 void CAAddDataToSendThread(CAData_t *data)
  91 {
  92     OIC_LOG(DEBUG, TAG, "IN");
  93     VERIFY_NON_NULL_VOID(data, TAG, "data");
  94
  95     // add thread
  96     CAQueueingThreadAddData(&g_sendThread, data, sizeof(CAData_t));
  97
  98     OIC_LOG(DEBUG, TAG, "OUT");
  99 }
 100
 101 void CAAddDataToReceiveThread(CAData_t *data)
 102 {
 103     OIC_LOG(DEBUG, TAG, "IN - CAAddDataToReceiveThread");
 104     VERIFY_NON_NULL_VOID(data, TAG, "data");
 105
 106     // add thread
 107     CAQueueingThreadAddData(&g_receiveThread, data, sizeof(CAData_t));
 108
 109     OIC_LOG(DEBUG, TAG, "OUT - CAAddDataToReceiveThread");
 110 }
 111 #endif
 112
 113 static bool CAIsSelectedNetworkAvailable()
 114 {
 115     u_arraylist_t *list = CAGetSelectedNetworkList();
 116     if (!list || u_arraylist_length(list) == 0)
 117     {
 118         OIC_LOG(ERROR, TAG, "No selected network");
 119         return false;
 120     }
 121
 122     return true;
 123 }
 124
 125 static CAData_t* CAGenerateHandlerData(const CAEndpoint_t *endpoint,
 126                                        const CARemoteId_t *identity,
 127                                        const void *data, CADataType_t dataType)
 128 {
 129     OIC_LOG(DEBUG, TAG, "CAGenerateHandlerData IN");
 130     CAInfo_t *info = NULL;
 131     CAData_t *cadata = (CAData_t *) OICCalloc(1, sizeof(CAData_t));
 132     if (!cadata)
 133     {
 134         OIC_LOG(ERROR, TAG, "memory allocation failed");
 135         return NULL;
 136     }
 137
 138     CAEndpoint_t* ep = CACloneEndpoint(endpoint);
 139     if (!ep)
 140     {
 141         OIC_LOG(ERROR, TAG, "endpoint clone failed");
 142         OICFree(cadata);
 143         return NULL;
 144     }
 145
 146     OIC_LOG_V(DEBUG, TAG, "address : %s", ep->addr);
 147     CAResult_t result;
 148
 149     if(CA_RESPONSE_DATA == dataType)
 150     {
 151         CAResponseInfo_t* resInfo = (CAResponseInfo_t*)OICCalloc(1, sizeof(CAResponseInfo_t));
 152         if (!resInfo)
 153         {
 154             OIC_LOG(ERROR, TAG, "memory allocation failed");
 155             OICFree(cadata);
 156             CAFreeEndpoint(ep);
 157             return NULL;
 158         }
 159
 160         result = CAGetResponseInfoFromPDU(data, resInfo, endpoint);
 161         if (CA_STATUS_OK != result)
 162         {
 163             OIC_LOG(ERROR, TAG, "CAGetResponseInfoFromPDU Failed");
 164             CAFreeEndpoint(ep);
 165             CADestroyResponseInfoInternal(resInfo);
 166             OICFree(cadata);
 167             return NULL;
 168         }
 169         cadata->responseInfo = resInfo;
 170         info = &resInfo->info;
 171         if (identity)
 172         {
 173             info->identity = *identity;
 174         }
 175         OIC_LOG(DEBUG, TAG, "Response Info :");
 176         CALogPayloadInfo(info);
 177     }
 178     else if (CA_REQUEST_DATA == dataType)
 179     {
 180         CARequestInfo_t* reqInfo = (CARequestInfo_t*)OICCalloc(1, sizeof(CARequestInfo_t));
 181         if (!reqInfo)
 182         {
 183             OIC_LOG(ERROR, TAG, "memory allocation failed");
 184             OICFree(cadata);
 185             CAFreeEndpoint(ep);
 186             return NULL;
 187         }
 188
 189         result = CAGetRequestInfoFromPDU(data, endpoint, reqInfo);
 190         if (CA_STATUS_OK != result)
 191         {
 192             OIC_LOG(ERROR, TAG, "CAGetRequestInfoFromPDU failed");
 193             CAFreeEndpoint(ep);
 194             CADestroyRequestInfoInternal(reqInfo);
 195             OICFree(cadata);
 196             return NULL;
 197         }
 198
 199         if (CADropSecondMessage(&caglobals.ca.requestHistory, endpoint, reqInfo->info.messageId,
 200                                 reqInfo->info.token, reqInfo->info.tokenLength))
 201         {
 202             OIC_LOG(ERROR, TAG, "Second Request with same Token, Drop it");
 203             CAFreeEndpoint(ep);
 204             CADestroyRequestInfoInternal(reqInfo);
 205             OICFree(cadata);
 206             return NULL;
 207         }
 208
 209         cadata->requestInfo = reqInfo;
 210         info = &reqInfo->info;
 211         if (identity)
 212         {
 213             info->identity = *identity;
 214         }
 215         OIC_LOG(DEBUG, TAG, "Request Info :");
 216         CALogPayloadInfo(info);
 217    }
 218     else if (CA_ERROR_DATA == dataType)
 219     {
 220         CAErrorInfo_t *errorInfo = (CAErrorInfo_t *)OICCalloc(1, sizeof (CAErrorInfo_t));
 221         if (!errorInfo)
 222         {
 223             OIC_LOG(ERROR, TAG, "Memory allocation failed!");
 224             OICFree(cadata);
 225             CAFreeEndpoint(ep);
 226             return NULL;
 227         }
 228
 229         CAResult_t result = CAGetErrorInfoFromPDU(data, endpoint, errorInfo);
 230         if (CA_STATUS_OK != result)
 231         {
 232             OIC_LOG(ERROR, TAG, "CAGetErrorInfoFromPDU failed");
 233             CAFreeEndpoint(ep);
 234             OICFree(errorInfo);
 235             OICFree(cadata);
 236             return NULL;
 237         }
 238
 239         cadata->errorInfo = errorInfo;
 240         info = &errorInfo->info;
 241         if (identity)
 242         {
 243             info->identity = *identity;
 244         }
 245         OIC_LOG(DEBUG, TAG, "error Info :");
 246         CALogPayloadInfo(info);
 247     }
 248
 249     cadata->remoteEndpoint = ep;
 250     cadata->dataType = dataType;
 251
 252     return cadata;
 253
 254     OIC_LOG(DEBUG, TAG, "CAGenerateHandlerData OUT");
 255 }
 256
 257 static void CATimeoutCallback(const CAEndpoint_t *endpoint, const void *pdu, uint32_t size)
 258 {
 259     OIC_LOG(DEBUG, TAG, "IN");
 260     VERIFY_NON_NULL_VOID(endpoint, TAG, "endpoint");
 261     VERIFY_NON_NULL_VOID(pdu, TAG, "pdu");
 262
 263     CAEndpoint_t* ep = CACloneEndpoint(endpoint);
 264     if (!ep)
 265     {
 266         OIC_LOG(ERROR, TAG, "clone failed");
 267         return;
 268     }
 269
 270     CAResponseInfo_t* resInfo = (CAResponseInfo_t*)OICCalloc(1, sizeof(CAResponseInfo_t));
 271
 272     if (!resInfo)
 273     {
 274         OIC_LOG(ERROR, TAG, "calloc failed");
 275         CAFreeEndpoint(ep);
 276         return;
 277     }
 278
 279     resInfo->result = CA_RETRANSMIT_TIMEOUT;
 280     resInfo->info.type = CAGetMessageTypeFromPduBinaryData(pdu, size);
 281     resInfo->info.messageId = CAGetMessageIdFromPduBinaryData(pdu, size);
 282
 283     CAResult_t res = CAGetTokenFromPDU((const coap_hdr_t *) pdu, &(resInfo->info),
 284                                        endpoint);
 285     if (CA_STATUS_OK != res)
 286     {
 287         OIC_LOG(ERROR, TAG, "fail to get Token from retransmission list");
 288         CADestroyResponseInfoInternal(resInfo);
 289         CAFreeEndpoint(ep);
 290         return;
 291     }
 292
 293     CAData_t *cadata = (CAData_t *) OICCalloc(1, sizeof(CAData_t));
 294     if (NULL == cadata)
 295     {
 296         OIC_LOG(ERROR, TAG, "memory allocation failed !");
 297         CAFreeEndpoint(ep);
 298         CADestroyResponseInfoInternal(resInfo);
 299         return;
 300     }
 301
 302     cadata->type = SEND_TYPE_UNICAST;
 303     cadata->remoteEndpoint = ep;
 304     cadata->requestInfo = NULL;
 305     cadata->responseInfo = resInfo;
 306
 307 #ifdef SINGLE_THREAD
 308     CAProcessReceivedData(cadata);
 309 #else
 310     CAQueueingThreadAddData(&g_receiveThread, cadata, sizeof(CAData_t));
 311 #endif
 312
 313     OIC_LOG(DEBUG, TAG, "OUT");
 314 }
 315
 316 static void CADestroyData(void *data, uint32_t size)
 317 {
 318     OIC_LOG(DEBUG, TAG, "CADestroyData IN");
 319     if ((size_t)size < sizeof(CAData_t))
 320     {
 321         OIC_LOG_V(ERROR, TAG, "Destroy data too small %p %d", data, size);
 322     }
 323     CAData_t *cadata = (CAData_t *) data;
 324
 325     if (NULL == cadata)
 326     {
 327         OIC_LOG(ERROR, TAG, "cadata is NULL");
 328         return;
 329     }
 330
 331     if (NULL != cadata->remoteEndpoint)
 332     {
 333         CAFreeEndpoint(cadata->remoteEndpoint);
 334     }
 335
 336     if (NULL != cadata->requestInfo)
 337     {
 338         CADestroyRequestInfoInternal((CARequestInfo_t *) cadata->requestInfo);
 339     }
 340
 341     if (NULL != cadata->responseInfo)
 342     {
 343         CADestroyResponseInfoInternal((CAResponseInfo_t *) cadata->responseInfo);
 344     }
 345
 346     if (NULL != cadata->errorInfo)
 347     {
 348         CADestroyErrorInfoInternal(cadata->errorInfo);
 349     }
 350
 351     OICFree(cadata);
 352     OIC_LOG(DEBUG, TAG, "CADestroyData OUT");
 353 }
 354
 355 #ifdef SINGLE_THREAD
 356 static void CAProcessReceivedData(CAData_t *data)
 357 {
 358     OIC_LOG(DEBUG, TAG, "CAProcessReceivedData IN");
 359     if (!data)
 360     {
 361         OIC_LOG(ERROR, TAG, "thread data error!!");
 362         return;
 363     }
 364
 365     // parse the data and call the callbacks.
 366     // #1 parse the data
 367     // #2 get endpoint
 368     CAEndpoint_t *rep = (CAEndpoint_t *)(data->remoteEndpoint);
 369     if (!rep)
 370     {
 371         OIC_LOG(ERROR, TAG, "remoteEndpoint error!!");
 372         return;
 373     }
 374
 375     if (data->requestInfo && g_requestHandler)
 376     {
 377         g_requestHandler(rep, data->requestInfo);
 378     }
 379     else if (data->responseInfo && g_responseHandler)
 380     {
 381         g_responseHandler(rep, data->responseInfo);
 382     }
 383     else if (data->errorInfo && g_errorHandler)
 384     {
 385         g_errorHandler(rep, data->errorInfo);
 386     }
 387
 388 #ifdef SINGLE_THREAD
 389     CADestroyData(data, sizeof(CAData_t));
 390 #endif
 391
 392     OIC_LOG(DEBUG, TAG, "CAProcessReceivedData OUT");
 393 }
 394 #endif
 395
 396 #ifndef SINGLE_THREAD
 397
 398 static void CAReceiveThreadProcess(void *threadData)
 399 {
 400     OIC_LOG(DEBUG, TAG, "IN");
 401 #ifndef SINGLE_HANDLE
 402     CAData_t *data = (CAData_t *) threadData;
 403     CAProcessReceivedData(data);
 404 #else
 405     (void)threadData;
 406 #endif
 407     OIC_LOG(DEBUG, TAG, "OUT");
 408 }
 409 #endif
 410
 411 static CAResult_t CAProcessSendData(const CAData_t *data)
 412 {
 413     OIC_LOG(DEBUG, TAG, "IN");
 414     VERIFY_NON_NULL(data, TAG, "data");
 415     VERIFY_NON_NULL(data->remoteEndpoint, TAG, "remoteEndpoint");
 416
 417     CAResult_t res = CA_STATUS_FAILED;
 418
 419     CASendDataType_t type = data->type;
 420
 421     coap_pdu_t *pdu = NULL;
 422     CAInfo_t *info = NULL;
 423
 424     if (SEND_TYPE_UNICAST == type)
 425     {
 426         OIC_LOG(DEBUG,TAG,"Unicast message");
 427 #ifdef ROUTING_GATEWAY
 428         /*
 429          * When forwarding a packet, do not attempt retransmission as its the responsibility of
 430          * packet originator node
 431          */
 432         bool skipRetransmission = false;
 433 #endif
 434
 435         if (NULL != data->requestInfo)
 436         {
 437             OIC_LOG(DEBUG, TAG, "requestInfo is available..");
 438
 439             info = &data->requestInfo->info;
 440 #ifdef ROUTING_GATEWAY
 441             skipRetransmission = data->requestInfo->info.skipRetransmission;
 442 #endif
 443             pdu = CAGeneratePDU(data->requestInfo->method, info, data->remoteEndpoint);
 444         }
 445         else if (NULL != data->responseInfo)
 446         {
 447             OIC_LOG(DEBUG, TAG, "responseInfo is available..");
 448
 449             info = &data->responseInfo->info;
 450 #ifdef ROUTING_GATEWAY
 451             skipRetransmission = data->responseInfo->info.skipRetransmission;
 452 #endif
 453             pdu = CAGeneratePDU(data->responseInfo->result, info, data->remoteEndpoint);
 454         }
 455         else
 456         {
 457             OIC_LOG(DEBUG, TAG, "request info, response info is empty");
 458             return CA_STATUS_INVALID_PARAM;
 459         }
 460
 461         // interface controller function call.
 462         if (NULL != pdu)
 463         {
 464 #ifdef WITH_BWT
 465             if (CA_ADAPTER_GATT_BTLE != data->remoteEndpoint->adapter
 466 #ifdef TCP_ADAPTER
 467                     && CA_ADAPTER_TCP != data->remoteEndpoint->adapter
 468 #endif
 469                     )
 470             {
 471                 // Blockwise transfer
 472                 if (NULL != info)
 473                 {
 474                     CAResult_t res = CAAddBlockOption(&pdu, info,
 475                                                       data->remoteEndpoint);
 476                     if (CA_STATUS_OK != res)
 477                     {
 478                         OIC_LOG(INFO, TAG, "to write block option has failed");
 479                         CAErrorHandler(data->remoteEndpoint, pdu->hdr, pdu->length, res);
 480                         coap_delete_pdu(pdu);
 481                         return res;
 482                     }
 483                 }
 484             }
 485 #endif
 486             CALogPDUInfo(pdu, data->remoteEndpoint);
 487
 488             res = CASendUnicastData(data->remoteEndpoint, pdu->hdr, pdu->length);
 489             if (CA_STATUS_OK != res)
 490             {
 491                 OIC_LOG_V(ERROR, TAG, "send failed:%d", res);
 492                 CAErrorHandler(data->remoteEndpoint, pdu->hdr, pdu->length, res);
 493                 coap_delete_pdu(pdu);
 494                 return res;
 495             }
 496
 497 #ifdef TCP_ADAPTER
 498             if (CA_ADAPTER_TCP == data->remoteEndpoint->adapter)
 499             {
 500                 OIC_LOG(INFO, TAG, "retransmission will be not worked");
 501             }
 502             else
 503 #endif
 504 #ifdef ROUTING_GATEWAY
 505             if(!skipRetransmission)
 506 #endif
 507             {
 508                 // for retransmission
 509                 res = CARetransmissionSentData(&g_retransmissionContext, data->remoteEndpoint,
 510                                                pdu->hdr, pdu->length);
 511                 if ((CA_STATUS_OK != res) && (CA_NOT_SUPPORTED != res))
 512                 {
 513                     //when retransmission not supported this will return CA_NOT_SUPPORTED, ignore
 514                     OIC_LOG_V(INFO, TAG, "retransmission is not enabled due to error, res : %d", res);
 515                     coap_delete_pdu(pdu);
 516                     return res;
 517                 }
 518             }
 519
 520             coap_delete_pdu(pdu);
 521         }
 522         else
 523         {
 524             OIC_LOG(ERROR,TAG,"Failed to generate unicast PDU");
 525             CASendErrorInfo(data->remoteEndpoint, info, CA_SEND_FAILED);
 526             return CA_SEND_FAILED;
 527         }
 528     }
 529     else if (SEND_TYPE_MULTICAST == type)
 530     {
 531         OIC_LOG(DEBUG,TAG,"Multicast message");
 532         if (NULL != data->requestInfo)
 533         {
 534             OIC_LOG(DEBUG, TAG, "requestInfo is available..");
 535
 536             info = &data->requestInfo->info;
 537             pdu = CAGeneratePDU(CA_GET, info, data->remoteEndpoint);
 538             if (NULL != pdu)
 539             {
 540 #ifdef WITH_BWT
 541                 if (CA_ADAPTER_GATT_BTLE != data->remoteEndpoint->adapter
 542 #ifdef TCP_ADAPTER
 543                         && CA_ADAPTER_TCP != data->remoteEndpoint->adapter
 544 #endif
 545                         )
 546                 {
 547                     // Blockwise transfer
 548                     CAResult_t res = CAAddBlockOption(&pdu, &data->requestInfo->info,
 549                                                       data->remoteEndpoint);
 550                     if (CA_STATUS_OK != res)
 551                     {
 552                         OIC_LOG(DEBUG, TAG, "CAAddBlockOption has failed");
 553                         CAErrorHandler(data->remoteEndpoint, pdu->hdr, pdu->length, res);
 554                         coap_delete_pdu(pdu);
 555                         return res;
 556                     }
 557                 }
 558 #endif
 559             }
 560             else
 561             {
 562                 OIC_LOG(ERROR,TAG,"Failed to generate multicast PDU");
 563                 CASendErrorInfo(data->remoteEndpoint, info, CA_SEND_FAILED);
 564                 return CA_SEND_FAILED;
 565             }
 566         }
 567         else if (NULL != data->responseInfo)
 568         {
 569             OIC_LOG(DEBUG, TAG, "responseInfo is available..");
 570
 571             info = &data->responseInfo->info;
 572             pdu = CAGeneratePDU(data->responseInfo->result, info, data->remoteEndpoint);
 573
 574             if (NULL != pdu)
 575             {
 576 #ifdef WITH_BWT
 577                 if (CA_ADAPTER_GATT_BTLE != data->remoteEndpoint->adapter
 578 #ifdef TCP_ADAPTER
 579                         && CA_ADAPTER_TCP != data->remoteEndpoint->adapter
 580 #endif
 581                         )
 582                 {
 583                     // Blockwise transfer
 584                     if (NULL != info)
 585                     {
 586                         CAResult_t res = CAAddBlockOption(&pdu, info,
 587                                                           data->remoteEndpoint);
 588                         if (CA_STATUS_OK != res)
 589                         {
 590                             OIC_LOG(INFO, TAG, "to write block option has failed");
 591                             CAErrorHandler(data->remoteEndpoint, pdu->hdr, pdu->length, res);
 592                             coap_delete_pdu(pdu);
 593                             return res;
 594                         }
 595                     }
 596                 }
 597 #endif
 598             }
 599             else
 600             {
 601                 OIC_LOG(ERROR,TAG,"Failed to generate multicast PDU");
 602                 CASendErrorInfo(data->remoteEndpoint, info, CA_SEND_FAILED);
 603                 return CA_SEND_FAILED;
 604             }
 605         }
 606         else
 607         {
 608             OIC_LOG(ERROR, TAG, "request or response info is empty");
 609             return CA_SEND_FAILED;
 610         }
 611
 612         CALogPDUInfo(pdu, data->remoteEndpoint);
 613
 614         OIC_LOG(DEBUG, TAG, "pdu to send :");
 615         OIC_LOG_BUFFER(DEBUG, TAG,  pdu->hdr, pdu->length);
 616
 617         res = CASendMulticastData(data->remoteEndpoint, pdu->hdr, pdu->length);
 618         if (CA_STATUS_OK != res)
 619         {
 620             OIC_LOG_V(ERROR, TAG, "send failed:%d", res);
 621             CAErrorHandler(data->remoteEndpoint, pdu->hdr, pdu->length, res);
 622             coap_delete_pdu(pdu);
 623             return res;
 624         }
 625
 626         coap_delete_pdu(pdu);
 627     }
 628
 629     return CA_STATUS_OK;
 630 }
 631
 632 #ifndef SINGLE_THREAD
 633 static void CASendThreadProcess(void *threadData)
 634 {
 635     CAData_t *data = (CAData_t *) threadData;
 636     CAProcessSendData(data);
 637 }
 638
 639 #endif
 640
 641 /*
 642  * If a second message arrives with the same message ID, token and the other address
 643  * family, drop it.  Typically, IPv6 beats IPv4, so the IPv4 message is dropped.
 644  */
 645 static bool CADropSecondMessage(CAHistory_t *history, const CAEndpoint_t *ep, uint16_t id,
 646                                 CAToken_t token, uint8_t tokenLength)
 647 {
 648     if (!ep)
 649     {
 650         return true;
 651     }
 652     if (ep->adapter != CA_ADAPTER_IP)
 653     {
 654         return false;
 655     }
 656     if (!caglobals.ip.dualstack)
 657     {
 658         return false;
 659     }
 660
 661     if (tokenLength > CA_MAX_TOKEN_LEN)
 662     {
 663         /*
 664          * If token length is more than CA_MAX_TOKEN_LEN,
 665          * we compare the first CA_MAX_TOKEN_LEN bytes only.
 666          */
 667         tokenLength = CA_MAX_TOKEN_LEN;
 668     }
 669
 670     bool ret = false;
 671     CATransportFlags_t familyFlags = ep->flags & CA_IPFAMILY_MASK;
 672
 673     for (size_t i = 0; i < sizeof(history->items) / sizeof(history->items[0]); i++)
 674     {
 675         CAHistoryItem_t *item = &(history->items[i]);
 676         if (id == item->messageId && tokenLength == item->tokenLength
 677             && memcmp(item->token, token, tokenLength) == 0)
 678         {
 679             if ((familyFlags ^ item->flags) == CA_IPFAMILY_MASK)
 680             {
 681                 OIC_LOG_V(INFO, TAG, "IPv%c duplicate message ignored",
 682                                             familyFlags & CA_IPV6 ? '6' : '4');
 683                 ret = true;
 684                 break;
 685             }
 686         }
 687     }
 688
 689     history->items[history->nextIndex].flags = familyFlags;
 690     history->items[history->nextIndex].messageId = id;
 691     if (token && tokenLength)
 692     {
 693         memcpy(history->items[history->nextIndex].token, token, tokenLength);
 694         history->items[history->nextIndex].tokenLength = tokenLength;
 695     }
 696
 697     if (++history->nextIndex >= HISTORYSIZE)
 698     {
 699         history->nextIndex = 0;
 700     }
 701
 702     return ret;
 703 }
 704
 705 static void CAReceivedPacketCallback(const CASecureEndpoint_t *sep,
 706                                      const void *data, uint32_t dataLen)
 707 {
 708     OIC_LOG(DEBUG, TAG, "IN");
 709     VERIFY_NON_NULL_VOID(sep, TAG, "remoteEndpoint");
 710     VERIFY_NON_NULL_VOID(data, TAG, "data");
 711
 712     OIC_LOG(DEBUG, TAG, "received pdu data :");
 713     OIC_LOG_BUFFER(DEBUG, TAG,  data, dataLen);
 714
 715     uint32_t code = CA_NOT_FOUND;
 716     CAData_t *cadata = NULL;
 717
 718     coap_pdu_t *pdu = (coap_pdu_t *) CAParsePDU((const char *) data, dataLen, &code,
 719                                                 &(sep->endpoint));
 720     if (NULL == pdu)
 721     {
 722         OIC_LOG(ERROR, TAG, "Parse PDU failed");
 723         return;
 724     }
 725
 726     OIC_LOG_V(DEBUG, TAG, "code = %d", code);
 727     if (CA_GET == code || CA_POST == code || CA_PUT == code || CA_DELETE == code)
 728     {
 729         cadata = CAGenerateHandlerData(&(sep->endpoint), &(sep->identity), pdu, CA_REQUEST_DATA);
 730         if (!cadata)
 731         {
 732             OIC_LOG(ERROR, TAG, "CAReceivedPacketCallback, CAGenerateHandlerData failed!");
 733             coap_delete_pdu(pdu);
 734             return;
 735         }
 736     }
 737     else
 738     {
 739         cadata = CAGenerateHandlerData(&(sep->endpoint), &(sep->identity), pdu, CA_RESPONSE_DATA);
 740         if (!cadata)
 741         {
 742             OIC_LOG(ERROR, TAG, "CAReceivedPacketCallback, CAGenerateHandlerData failed!");
 743             coap_delete_pdu(pdu);
 744             return;
 745         }
 746
 747 #ifdef TCP_ADAPTER
 748         if (CA_ADAPTER_TCP == sep->endpoint.adapter)
 749         {
 750             OIC_LOG(INFO, TAG, "retransmission is not supported");
 751         }
 752         else
 753 #endif
 754         {
 755             // for retransmission
 756             void *retransmissionPdu = NULL;
 757             CARetransmissionReceivedData(&g_retransmissionContext, cadata->remoteEndpoint, pdu->hdr,
 758                                          pdu->length, &retransmissionPdu);
 759
 760             // get token from saved data in retransmission list
 761             if (retransmissionPdu && CA_EMPTY == code)
 762             {
 763                 if (cadata->responseInfo)
 764                 {
 765                     CAInfo_t *info = &cadata->responseInfo->info;
 766                     CAResult_t res = CAGetTokenFromPDU((const coap_hdr_t *)retransmissionPdu,
 767                                                        info, &(sep->endpoint));
 768                     if (CA_STATUS_OK != res)
 769                     {
 770                         OIC_LOG(ERROR, TAG, "fail to get Token from retransmission list");
 771                         OICFree(info->token);
 772                         info->tokenLength = 0;
 773                     }
 774                 }
 775             }
 776             OICFree(retransmissionPdu);
 777         }
 778     }
 779
 780     cadata->type = SEND_TYPE_UNICAST;
 781
 782 #ifdef SINGLE_THREAD
 783     CAProcessReceivedData(cadata);
 784 #else
 785 #ifdef WITH_BWT
 786     if (CA_ADAPTER_GATT_BTLE != sep->endpoint.adapter
 787 #ifdef TCP_ADAPTER
 788             && CA_ADAPTER_TCP != sep->endpoint.adapter
 789 #endif
 790             )
 791     {
 792         CAResult_t res = CAReceiveBlockWiseData(pdu, &(sep->endpoint), cadata, dataLen);
 793         if (CA_NOT_SUPPORTED == res)
 794         {
 795             OIC_LOG(ERROR, TAG, "this message does not have block option");
 796             CAQueueingThreadAddData(&g_receiveThread, cadata, sizeof(CAData_t));
 797         }
 798         else
 799         {
 800             CADestroyData(cadata, sizeof(CAData_t));
 801         }
 802     }
 803     else
 804 #endif
 805     {
 806         CAQueueingThreadAddData(&g_receiveThread, cadata, sizeof(CAData_t));
 807     }
 808 #endif
 809
 810     coap_delete_pdu(pdu);
 811
 812     OIC_LOG(DEBUG, TAG, "OUT");
 813 }
 814
 815 static void CANetworkChangedCallback(const CAEndpoint_t *info, CANetworkStatus_t status)
 816 {
 817     (void)info;
 818     (void)status;
 819     OIC_LOG(DEBUG, TAG, "IN");
 820
 821     OIC_LOG(DEBUG, TAG, "OUT");
 822 }
 823
 824 void CAHandleRequestResponseCallbacks()
 825 {
 826 #ifdef SINGLE_THREAD
 827     CAReadData();
 828     CARetransmissionBaseRoutine((void *)&g_retransmissionContext);
 829 #else
 830 #ifdef SINGLE_HANDLE
 831     // parse the data and call the callbacks.
 832     // #1 parse the data
 833     // #2 get endpoint
 834
 835     ca_mutex_lock(g_receiveThread.threadMutex);
 836
 837     u_queue_message_t *item = u_queue_get_element(g_receiveThread.dataQueue);
 838
 839     ca_mutex_unlock(g_receiveThread.threadMutex);
 840
 841     if (NULL == item)
 842     {
 843         return;
 844     }
 845
 846     // get values
 847     void *msg = item->msg;
 848
 849     if (NULL == msg)
 850     {
 851         return;
 852     }
 853
 854     // get endpoint
 855     CAData_t *td = (CAData_t *) msg;
 856
 857     if (td->requestInfo && g_requestHandler)
 858     {
 859         OIC_LOG_V(DEBUG, TAG, "request callback : %d", td->requestInfo->info.numOptions);
 860         g_requestHandler(td->remoteEndpoint, td->requestInfo);
 861     }
 862     else if (td->responseInfo && g_responseHandler)
 863     {
 864         OIC_LOG_V(DEBUG, TAG, "response callback : %d", td->responseInfo->info.numOptions);
 865         g_responseHandler(td->remoteEndpoint, td->responseInfo);
 866     }
 867     else if (td->errorInfo && g_errorHandler)
 868     {
 869         OIC_LOG_V(DEBUG, TAG, "error callback error: %d", td->errorInfo->result);
 870         g_errorHandler(td->remoteEndpoint, td->errorInfo);
 871     }
 872
 873     CADestroyData(msg, sizeof(CAData_t));
 874     OICFree(item);
 875
 876 #endif /* SINGLE_HANDLE */
 877 #endif
 878 }
 879
 880 static CAData_t* CAPrepareSendData(const CAEndpoint_t *endpoint, const void *sendData,
 881                                    CADataType_t dataType)
 882 {
 883     OIC_LOG(DEBUG, TAG, "CAPrepareSendData IN");
 884
 885     CAData_t *cadata = (CAData_t *) OICCalloc(1, sizeof(CAData_t));
 886     if (!cadata)
 887     {
 888         OIC_LOG(ERROR, TAG, "memory allocation failed");
 889         return NULL;
 890     }
 891
 892     if(CA_REQUEST_DATA == dataType)
 893     {
 894         // clone request info
 895         CARequestInfo_t *request = CACloneRequestInfo((CARequestInfo_t *)sendData);
 896
 897         if(!request)
 898         {
 899             OIC_LOG(ERROR, TAG, "CACloneRequestInfo failed");
 900             OICFree(cadata);
 901             return NULL;
 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             OICFree(cadata);
 916             return NULL;
 917         }
 918
 919         cadata->type = response->isMulticast ? SEND_TYPE_MULTICAST : SEND_TYPE_UNICAST;
 920         cadata->responseInfo = response;
 921     }
 922     else
 923     {
 924         OIC_LOG(ERROR, TAG, "CAPrepareSendData unknown data type");
 925         OICFree(cadata);
 926         return NULL;
 927     }
 928
 929     CAEndpoint_t* ep = CACloneEndpoint(endpoint);
 930     if (!ep)
 931     {
 932         OIC_LOG(ERROR, TAG, "endpoint clone failed");
 933         CADestroyData(cadata, sizeof(CAData_t));
 934         return NULL;
 935     }
 936
 937     cadata->remoteEndpoint = ep;
 938     cadata->dataType = dataType;
 939     return cadata;
 940 }
 941
 942 CAResult_t CADetachRequestMessage(const CAEndpoint_t *object, const CARequestInfo_t *request)
 943 {
 944     OIC_LOG(DEBUG, TAG, "IN");
 945
 946     VERIFY_NON_NULL(object, TAG, "object");
 947     VERIFY_NON_NULL(request, TAG, "request");
 948
 949     if (false == CAIsSelectedNetworkAvailable())
 950     {
 951         return CA_STATUS_FAILED;
 952     }
 953
 954 #ifdef ARDUINO
 955     // If max retransmission queue is reached, then don't handle new request
 956     if (CA_MAX_RT_ARRAY_SIZE == u_arraylist_length(g_retransmissionContext.dataList))
 957     {
 958         OIC_LOG(ERROR, TAG, "max RT queue size reached!");
 959         return CA_SEND_FAILED;
 960     }
 961 #endif /* ARDUINO */
 962
 963     CAData_t *data = CAPrepareSendData(object, request, CA_REQUEST_DATA);
 964     if(!data)
 965     {
 966         OIC_LOG(ERROR, TAG, "CAPrepareSendData failed");
 967         return CA_MEMORY_ALLOC_FAILED;
 968     }
 969
 970 #ifdef SINGLE_THREAD
 971     CAResult_t result = CAProcessSendData(data);
 972     if(CA_STATUS_OK != result)
 973     {
 974         OIC_LOG(ERROR, TAG, "CAProcessSendData failed");
 975         return result;
 976     }
 977
 978     CADestroyData(data, sizeof(CAData_t));
 979 #else
 980 #ifdef WITH_BWT
 981     if (CA_ADAPTER_GATT_BTLE != object->adapter
 982 #ifdef TCP_ADAPTER
 983             && CA_ADAPTER_TCP != object->adapter
 984 #endif
 985             )
 986     {
 987         // send block data
 988         CAResult_t res = CASendBlockWiseData(data);
 989         if(CA_NOT_SUPPORTED == res)
 990         {
 991             OIC_LOG(DEBUG, TAG, "normal msg will be sent");
 992             CAQueueingThreadAddData(&g_sendThread, data, sizeof(CAData_t));
 993             return CA_STATUS_OK;
 994         }
 995         else
 996         {
 997             CADestroyData(data, sizeof(CAData_t));
 998         }
 999         return res;
1000     }
1001     else
1002 #endif
1003     {
1004         CAQueueingThreadAddData(&g_sendThread, data, sizeof(CAData_t));
1005     }
1006 #endif
1007
1008     OIC_LOG(DEBUG, TAG, "OUT");
1009     return CA_STATUS_OK;
1010 }
1011
1012 CAResult_t CADetachResponseMessage(const CAEndpoint_t *object,
1013                                    const CAResponseInfo_t *response)
1014 {
1015     OIC_LOG(DEBUG, TAG, "IN");
1016     VERIFY_NON_NULL(object, TAG, "object");
1017     VERIFY_NON_NULL(response, TAG, "response");
1018
1019     if (false == CAIsSelectedNetworkAvailable())
1020     {
1021         return CA_STATUS_FAILED;
1022     }
1023
1024     CAData_t *data = CAPrepareSendData(object, response, CA_RESPONSE_DATA);
1025     if(!data)
1026     {
1027         OIC_LOG(ERROR, TAG, "CAPrepareSendData failed");
1028         return CA_MEMORY_ALLOC_FAILED;
1029     }
1030
1031 #ifdef SINGLE_THREAD
1032     CAResult_t result = CAProcessSendData(data);
1033     if(result != CA_STATUS_OK)
1034     {
1035         OIC_LOG(ERROR, TAG, "CAProcessSendData failed");
1036         return result;
1037     }
1038
1039     CADestroyData(data, sizeof(CAData_t));
1040 #else
1041 #ifdef WITH_BWT
1042     if (CA_ADAPTER_GATT_BTLE != object->adapter
1043 #ifdef TCP_ADAPTER
1044             && CA_ADAPTER_TCP != object->adapter
1045 #endif
1046             )
1047     {
1048         // send block data
1049         CAResult_t res = CASendBlockWiseData(data);
1050         if(CA_NOT_SUPPORTED == res)
1051         {
1052             OIC_LOG(DEBUG, TAG, "normal msg will be sent");
1053             CAQueueingThreadAddData(&g_sendThread, data, sizeof(CAData_t));
1054             return CA_STATUS_OK;
1055         }
1056         else
1057         {
1058             CADestroyData(data, sizeof(CAData_t));
1059         }
1060         return res;
1061     }
1062     else
1063 #endif
1064     {
1065         CAQueueingThreadAddData(&g_sendThread, data, sizeof(CAData_t));
1066     }
1067 #endif
1068
1069     OIC_LOG(DEBUG, TAG, "OUT");
1070     return CA_STATUS_OK;
1071 }
1072
1073 CAResult_t CADetachMessageResourceUri(const CAURI_t resourceUri, const CAToken_t token,
1074                                       uint8_t tokenLength, const CAHeaderOption_t *options,
1075                                       uint8_t numOptions)
1076 {
1077     (void)resourceUri;
1078     (void)token;
1079     (void)tokenLength;
1080     (void)options;
1081     (void)numOptions;
1082     return CA_NOT_SUPPORTED;
1083 }
1084
1085 void CASetInterfaceCallbacks(CARequestCallback ReqHandler, CAResponseCallback RespHandler,
1086                              CAErrorCallback errorHandler)
1087 {
1088     OIC_LOG(DEBUG, TAG, "IN");
1089     g_requestHandler = ReqHandler;
1090     g_responseHandler = RespHandler;
1091     g_errorHandler = errorHandler;
1092     OIC_LOG(DEBUG, TAG, "OUT");
1093 }
1094
1095 CAResult_t CAInitializeMessageHandler()
1096 {
1097     OIC_LOG(DEBUG, TAG, "IN");
1098     CASetPacketReceivedCallback(CAReceivedPacketCallback);
1099
1100     CASetNetworkChangeCallback(CANetworkChangedCallback);
1101     CASetErrorHandleCallback(CAErrorHandler);
1102
1103 #ifndef SINGLE_THREAD
1104     // create thread pool
1105     CAResult_t res = ca_thread_pool_init(MAX_THREAD_POOL_SIZE, &g_threadPoolHandle);
1106
1107     if (CA_STATUS_OK != res)
1108     {
1109         OIC_LOG(ERROR, TAG, "thread pool initialize error.");
1110         return res;
1111     }
1112
1113     // send thread initialize
1114     if (CA_STATUS_OK != CAQueueingThreadInitialize(&g_sendThread, g_threadPoolHandle,
1115                                                    CASendThreadProcess, CADestroyData))
1116     {
1117         OIC_LOG(ERROR, TAG, "Failed to Initialize send queue thread");
1118         return CA_STATUS_FAILED;
1119     }
1120
1121     // start send thread
1122     res = CAQueueingThreadStart(&g_sendThread);
1123
1124     if (CA_STATUS_OK != res)
1125     {
1126         OIC_LOG(ERROR, TAG, "thread start error(send thread).");
1127         ca_thread_pool_free(g_threadPoolHandle);
1128         g_threadPoolHandle = NULL;
1129         return res;
1130     }
1131
1132     // receive thread initialize
1133     if (CA_STATUS_OK != CAQueueingThreadInitialize(&g_receiveThread, g_threadPoolHandle,
1134                                                    CAReceiveThreadProcess, CADestroyData))
1135     {
1136         OIC_LOG(ERROR, TAG, "Failed to Initialize receive queue thread");
1137         return CA_STATUS_FAILED;
1138     }
1139
1140 #ifndef SINGLE_HANDLE // This will be enabled when RI supports multi threading
1141     // start receive thread
1142     res = CAQueueingThreadStart(&gReceiveThread);
1143
1144     if (res != CA_STATUS_OK)
1145     {
1146         OIC_LOG(ERROR, TAG, "thread start error(receive thread).");
1147         return res;
1148     }
1149 #endif /* SINGLE_HANDLE */
1150
1151     // retransmission initialize
1152     CARetransmissionInitialize(&g_retransmissionContext, g_threadPoolHandle, CASendUnicastData,
1153                                CATimeoutCallback, NULL);
1154
1155 #ifdef WITH_BWT
1156     // block-wise transfer initialize
1157     CAInitializeBlockWiseTransfer(CAAddDataToSendThread, CAAddDataToReceiveThread);
1158 #endif
1159
1160     // start retransmission
1161     res = CARetransmissionStart(&g_retransmissionContext);
1162
1163     if (CA_STATUS_OK != res)
1164     {
1165         OIC_LOG(ERROR, TAG, "thread start error(retransmission thread).");
1166         return res;
1167     }
1168
1169     // initialize interface adapters by controller
1170     CAInitializeAdapters(g_threadPoolHandle);
1171 #else
1172     // retransmission initialize
1173     CARetransmissionInitialize(&g_retransmissionContext, NULL, CASendUnicastData,
1174                                CATimeoutCallback, NULL);
1175     CAInitializeAdapters();
1176 #endif
1177
1178     OIC_LOG(DEBUG, TAG, "OUT");
1179     return CA_STATUS_OK;
1180 }
1181
1182 void CATerminateMessageHandler()
1183 {
1184     OIC_LOG(DEBUG, TAG, "IN");
1185 #ifndef SINGLE_THREAD
1186     CATransportAdapter_t connType;
1187     u_arraylist_t *list = CAGetSelectedNetworkList();
1188     uint32_t length = u_arraylist_length(list);
1189
1190     uint32_t i = 0;
1191     for (i = 0; i < length; i++)
1192     {
1193         void* ptrType = u_arraylist_get(list, i);
1194
1195         if (NULL == ptrType)
1196         {
1197             continue;
1198         }
1199
1200         connType = *(CATransportAdapter_t *)ptrType;
1201         CAStopAdapter(connType);
1202     }
1203
1204     // stop retransmission
1205     if (NULL != g_retransmissionContext.threadMutex)
1206     {
1207         CARetransmissionStop(&g_retransmissionContext);
1208     }
1209
1210     // stop thread
1211     // delete thread data
1212     if (NULL != g_sendThread.threadMutex)
1213     {
1214         CAQueueingThreadStop(&g_sendThread);
1215     }
1216
1217     // stop thread
1218     // delete thread data
1219     if (NULL != g_receiveThread.threadMutex)
1220     {
1221 #ifndef SINGLE_HANDLE // This will be enabled when RI supports multi threading
1222         CAQueueingThreadStop(&gReceiveThread);
1223 #endif /* SINGLE_HANDLE */
1224     }
1225
1226     // destroy thread pool
1227     if (NULL != g_threadPoolHandle)
1228     {
1229         ca_thread_pool_free(g_threadPoolHandle);
1230         g_threadPoolHandle = NULL;
1231     }
1232
1233 #ifdef WITH_BWT
1234     CATerminateBlockWiseTransfer();
1235 #endif
1236     CARetransmissionDestroy(&g_retransmissionContext);
1237     CAQueueingThreadDestroy(&g_sendThread);
1238     CAQueueingThreadDestroy(&g_receiveThread);
1239
1240     // terminate interface adapters by controller
1241     CATerminateAdapters();
1242 #else
1243     // terminate interface adapters by controller
1244     CATerminateAdapters();
1245
1246     // stop retransmission
1247     CARetransmissionStop(&g_retransmissionContext);
1248     CARetransmissionDestroy(&g_retransmissionContext);
1249 #endif
1250
1251     OIC_LOG(DEBUG, TAG, "OUT");
1252 }
1253
1254 void CALogPDUInfo(coap_pdu_t *pdu, const CAEndpoint_t *endpoint)
1255 {
1256     VERIFY_NON_NULL_VOID(pdu, TAG, "pdu");
1257
1258     OIC_LOG_V(DEBUG, TAG, "PDU Maker - payload : %s", pdu->data);
1259
1260 #ifdef TCP_ADAPTER
1261     if (CA_ADAPTER_TCP == endpoint->adapter)
1262     {
1263         OIC_LOG(DEBUG, TAG, "pdu header data :");
1264         OIC_LOG_BUFFER(DEBUG, TAG,  pdu->hdr, pdu->length);
1265     }
1266     else
1267 #endif
1268     {
1269         OIC_LOG_V(DEBUG, TAG, "PDU Maker - type : %d", pdu->hdr->coap_hdr_udp_t.type);
1270
1271         OIC_LOG_V(DEBUG, TAG, "PDU Maker - code : %d", pdu->hdr->coap_hdr_udp_t.code);
1272
1273         OIC_LOG(DEBUG, TAG, "PDU Maker - token :");
1274
1275         OIC_LOG_BUFFER(DEBUG, TAG, pdu->hdr->coap_hdr_udp_t.token,
1276                        pdu->hdr->coap_hdr_udp_t.token_length);
1277     }
1278 }
1279
1280 static void CALogPayloadInfo(CAInfo_t *info)
1281 {
1282     if(info)
1283     {
1284         if (info->options)
1285         {
1286             for (uint32_t i = 0; i < info->numOptions; i++)
1287             {
1288                 OIC_LOG_V(DEBUG, TAG, "optionID: %d", info->options[i].optionID);
1289
1290                 OIC_LOG_V(DEBUG, TAG, "list: %s", info->options[i].optionData);
1291             }
1292         }
1293
1294         if (info->payload)
1295         {
1296             OIC_LOG_V(DEBUG, TAG, "payload: %p(%u)", info->payload,
1297                       info->payloadSize);
1298         }
1299
1300         if (info->token)
1301         {
1302             OIC_LOG(DEBUG, TAG, "token:");
1303             OIC_LOG_BUFFER(DEBUG, TAG, (const uint8_t *) info->token,
1304                            info->tokenLength);
1305         }
1306         OIC_LOG_V(DEBUG, TAG, "msgID: %d", info->messageId);
1307     }
1308     else
1309     {
1310         OIC_LOG(DEBUG, TAG, "info is NULL, cannot output log data");
1311     }
1312 }
1313
1314 void CAErrorHandler(const CAEndpoint_t *endpoint,
1315                     const void *data, uint32_t dataLen,
1316                     CAResult_t result)
1317 {
1318     OIC_LOG(DEBUG, TAG, "CAErrorHandler IN");
1319
1320 #ifndef SINGLE_THREAD
1321
1322     VERIFY_NON_NULL_VOID(endpoint, TAG, "remoteEndpoint");
1323     VERIFY_NON_NULL_VOID(data, TAG, "data");
1324
1325     uint32_t code = CA_NOT_FOUND;
1326     //Do not free remoteEndpoint and data. Currently they will be freed in data thread
1327     //Get PDU data
1328     coap_pdu_t *pdu = (coap_pdu_t *)CAParsePDU((const char *)data, dataLen, &code, endpoint);
1329     if (NULL == pdu)
1330     {
1331         OIC_LOG(ERROR, TAG, "Parse PDU failed");
1332         return;
1333     }
1334
1335     CAData_t *cadata = CAGenerateHandlerData(endpoint, NULL, pdu, CA_ERROR_DATA);
1336     if(!cadata)
1337     {
1338         OIC_LOG(ERROR, TAG, "CAErrorHandler, CAGenerateHandlerData failed!");
1339         coap_delete_pdu(pdu);
1340         return;
1341     }
1342
1343     cadata->errorInfo->result = result;
1344
1345     CAQueueingThreadAddData(&g_receiveThread, cadata, sizeof(CAData_t));
1346     coap_delete_pdu(pdu);
1347 #endif
1348
1349     OIC_LOG(DEBUG, TAG, "CAErrorHandler OUT");
1350     return;
1351 }
1352
1353 static void CASendErrorInfo(const CAEndpoint_t *endpoint, const CAInfo_t *info, CAResult_t result)
1354 {
1355     OIC_LOG(DEBUG, TAG, "CASendErrorInfo IN");
1356 #ifndef SINGLE_THREAD
1357     CAData_t *cadata = (CAData_t *) OICCalloc(1, sizeof(CAData_t));
1358     if (!cadata)
1359     {
1360         OIC_LOG(ERROR, TAG, "memory allocation failed");
1361         return;
1362     }
1363
1364     CAEndpoint_t* ep = CACloneEndpoint(endpoint);
1365     if (!ep)
1366     {
1367         OIC_LOG(ERROR, TAG, "endpoint clone failed");
1368         OICFree(cadata);
1369         return;
1370     }
1371
1372     CAErrorInfo_t *errorInfo = (CAErrorInfo_t *)OICCalloc(1, sizeof (CAErrorInfo_t));
1373     if (!errorInfo)
1374     {
1375         OICFree(cadata);
1376         CAFreeEndpoint(ep);
1377         return;
1378     }
1379
1380     CAResult_t res = CACloneInfo(info, &errorInfo->info);
1381     if (CA_STATUS_OK != res)
1382     {
1383         OICFree(cadata);
1384         CAFreeEndpoint(ep);
1385         return;
1386     }
1387
1388     errorInfo->result = result;
1389     cadata->remoteEndpoint = ep;
1390     cadata->errorInfo = errorInfo;
1391     cadata->dataType = CA_ERROR_DATA;
1392
1393     CAQueueingThreadAddData(&g_receiveThread, cadata, sizeof(CAData_t));
1394 #endif
1395     OIC_LOG(DEBUG, TAG, "CASendErrorInfo OUT");
1396 }