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     VERIFY_NON_NULL_VOID(data, TAG, "data");
  93
  94     // add thread
  95     CAQueueingThreadAddData(&g_sendThread, data, sizeof(CAData_t));
  96 }
  97
  98 void CAAddDataToReceiveThread(CAData_t *data)
  99 {
 100     VERIFY_NON_NULL_VOID(data, TAG, "data");
 101
 102     // add thread
 103     CAQueueingThreadAddData(&g_receiveThread, data, sizeof(CAData_t));
 104 }
 105 #endif
 106
 107 static bool CAIsSelectedNetworkAvailable()
 108 {
 109     u_arraylist_t *list = CAGetSelectedNetworkList();
 110     if (!list || u_arraylist_length(list) == 0)
 111     {
 112         OIC_LOG(ERROR, TAG, "No selected network");
 113         return false;
 114     }
 115
 116     return true;
 117 }
 118
 119 static CAData_t* CAGenerateHandlerData(const CAEndpoint_t *endpoint,
 120                                        const CARemoteId_t *identity,
 121                                        const void *data, CADataType_t dataType)
 122 {
 123     OIC_LOG(DEBUG, TAG, "CAGenerateHandlerData IN");
 124     CAInfo_t *info = NULL;
 125     CAData_t *cadata = (CAData_t *) OICCalloc(1, sizeof(CAData_t));
 126     if (!cadata)
 127     {
 128         OIC_LOG(ERROR, TAG, "memory allocation failed");
 129         return NULL;
 130     }
 131
 132     CAEndpoint_t* ep = CACloneEndpoint(endpoint);
 133     if (!ep)
 134     {
 135         OIC_LOG(ERROR, TAG, "endpoint clone failed");
 136         OICFree(cadata);
 137         return NULL;
 138     }
 139
 140     OIC_LOG_V(DEBUG, TAG, "address : %s", ep->addr);
 141     CAResult_t result;
 142
 143     if(CA_RESPONSE_DATA == dataType)
 144     {
 145         CAResponseInfo_t* resInfo = (CAResponseInfo_t*)OICCalloc(1, sizeof(CAResponseInfo_t));
 146         if (!resInfo)
 147         {
 148             OIC_LOG(ERROR, TAG, "memory allocation failed");
 149             OICFree(cadata);
 150             CAFreeEndpoint(ep);
 151             return NULL;
 152         }
 153
 154         result = CAGetResponseInfoFromPDU(data, resInfo, endpoint);
 155         if (CA_STATUS_OK != result)
 156         {
 157             OIC_LOG(ERROR, TAG, "CAGetResponseInfoFromPDU Failed");
 158             CAFreeEndpoint(ep);
 159             CADestroyResponseInfoInternal(resInfo);
 160             OICFree(cadata);
 161             return NULL;
 162         }
 163         cadata->responseInfo = resInfo;
 164         info = &resInfo->info;
 165         if (identity)
 166         {
 167             info->identity = *identity;
 168         }
 169         OIC_LOG(DEBUG, TAG, "Response Info :");
 170         CALogPayloadInfo(info);
 171     }
 172     else if (CA_REQUEST_DATA == dataType)
 173     {
 174         CARequestInfo_t* reqInfo = (CARequestInfo_t*)OICCalloc(1, sizeof(CARequestInfo_t));
 175         if (!reqInfo)
 176         {
 177             OIC_LOG(ERROR, TAG, "memory allocation failed");
 178             OICFree(cadata);
 179             CAFreeEndpoint(ep);
 180             return NULL;
 181         }
 182
 183         result = CAGetRequestInfoFromPDU(data, endpoint, reqInfo);
 184         if (CA_STATUS_OK != result)
 185         {
 186             OIC_LOG(ERROR, TAG, "CAGetRequestInfoFromPDU failed");
 187             CAFreeEndpoint(ep);
 188             CADestroyRequestInfoInternal(reqInfo);
 189             OICFree(cadata);
 190             return NULL;
 191         }
 192
 193         if (CADropSecondMessage(&caglobals.ca.requestHistory, endpoint, reqInfo->info.messageId,
 194                                 reqInfo->info.token, reqInfo->info.tokenLength))
 195         {
 196             OIC_LOG(ERROR, TAG, "Second Request with same Token, Drop it");
 197             CAFreeEndpoint(ep);
 198             CADestroyRequestInfoInternal(reqInfo);
 199             OICFree(cadata);
 200             return NULL;
 201         }
 202
 203         cadata->requestInfo = reqInfo;
 204         info = &reqInfo->info;
 205         if (identity)
 206         {
 207             info->identity = *identity;
 208         }
 209         OIC_LOG(DEBUG, TAG, "Request Info :");
 210         CALogPayloadInfo(info);
 211    }
 212     else if (CA_ERROR_DATA == dataType)
 213     {
 214         CAErrorInfo_t *errorInfo = (CAErrorInfo_t *)OICCalloc(1, sizeof (CAErrorInfo_t));
 215         if (!errorInfo)
 216         {
 217             OIC_LOG(ERROR, TAG, "Memory allocation failed!");
 218             OICFree(cadata);
 219             CAFreeEndpoint(ep);
 220             return NULL;
 221         }
 222
 223         CAResult_t result = CAGetErrorInfoFromPDU(data, endpoint, errorInfo);
 224         if (CA_STATUS_OK != result)
 225         {
 226             OIC_LOG(ERROR, TAG, "CAGetErrorInfoFromPDU failed");
 227             CAFreeEndpoint(ep);
 228             OICFree(errorInfo);
 229             OICFree(cadata);
 230             return NULL;
 231         }
 232
 233         cadata->errorInfo = errorInfo;
 234         info = &errorInfo->info;
 235         if (identity)
 236         {
 237             info->identity = *identity;
 238         }
 239         OIC_LOG(DEBUG, TAG, "error Info :");
 240         CALogPayloadInfo(info);
 241     }
 242
 243     cadata->remoteEndpoint = ep;
 244     cadata->dataType = dataType;
 245
 246     return cadata;
 247
 248     OIC_LOG(DEBUG, TAG, "CAGenerateHandlerData OUT");
 249 }
 250
 251 static void CATimeoutCallback(const CAEndpoint_t *endpoint, const void *pdu, uint32_t size)
 252 {
 253     VERIFY_NON_NULL_VOID(endpoint, TAG, "endpoint");
 254     VERIFY_NON_NULL_VOID(pdu, TAG, "pdu");
 255
 256     CAEndpoint_t* ep = CACloneEndpoint(endpoint);
 257     if (!ep)
 258     {
 259         OIC_LOG(ERROR, TAG, "clone failed");
 260         return;
 261     }
 262
 263     CAResponseInfo_t* resInfo = (CAResponseInfo_t*)OICCalloc(1, sizeof(CAResponseInfo_t));
 264
 265     if (!resInfo)
 266     {
 267         OIC_LOG(ERROR, TAG, "calloc failed");
 268         CAFreeEndpoint(ep);
 269         return;
 270     }
 271
 272     resInfo->result = CA_RETRANSMIT_TIMEOUT;
 273     resInfo->info.type = CAGetMessageTypeFromPduBinaryData(pdu, size);
 274     resInfo->info.messageId = CAGetMessageIdFromPduBinaryData(pdu, size);
 275
 276     CAResult_t res = CAGetTokenFromPDU((const coap_hdr_t *) pdu, &(resInfo->info),
 277                                        endpoint);
 278     if (CA_STATUS_OK != res)
 279     {
 280         OIC_LOG(ERROR, TAG, "fail to get Token from retransmission list");
 281         CADestroyResponseInfoInternal(resInfo);
 282         CAFreeEndpoint(ep);
 283         return;
 284     }
 285
 286     CAData_t *cadata = (CAData_t *) OICCalloc(1, sizeof(CAData_t));
 287     if (NULL == cadata)
 288     {
 289         OIC_LOG(ERROR, TAG, "memory allocation failed !");
 290         CAFreeEndpoint(ep);
 291         CADestroyResponseInfoInternal(resInfo);
 292         return;
 293     }
 294
 295     cadata->type = SEND_TYPE_UNICAST;
 296     cadata->remoteEndpoint = ep;
 297     cadata->requestInfo = NULL;
 298     cadata->responseInfo = resInfo;
 299
 300 #ifdef SINGLE_THREAD
 301     CAProcessReceivedData(cadata);
 302 #else
 303     CAQueueingThreadAddData(&g_receiveThread, cadata, sizeof(CAData_t));
 304 #endif
 305 }
 306
 307 static void CADestroyData(void *data, uint32_t size)
 308 {
 309     OIC_LOG(DEBUG, TAG, "CADestroyData IN");
 310     if ((size_t)size < sizeof(CAData_t))
 311     {
 312         OIC_LOG_V(ERROR, TAG, "Destroy data too small %p %d", data, size);
 313     }
 314     CAData_t *cadata = (CAData_t *) data;
 315
 316     if (NULL == cadata)
 317     {
 318         OIC_LOG(ERROR, TAG, "cadata is NULL");
 319         return;
 320     }
 321
 322     if (NULL != cadata->remoteEndpoint)
 323     {
 324         CAFreeEndpoint(cadata->remoteEndpoint);
 325     }
 326
 327     if (NULL != cadata->requestInfo)
 328     {
 329         CADestroyRequestInfoInternal((CARequestInfo_t *) cadata->requestInfo);
 330     }
 331
 332     if (NULL != cadata->responseInfo)
 333     {
 334         CADestroyResponseInfoInternal((CAResponseInfo_t *) cadata->responseInfo);
 335     }
 336
 337     if (NULL != cadata->errorInfo)
 338     {
 339         CADestroyErrorInfoInternal(cadata->errorInfo);
 340     }
 341
 342     OICFree(cadata);
 343     OIC_LOG(DEBUG, TAG, "CADestroyData OUT");
 344 }
 345
 346 #ifdef SINGLE_THREAD
 347 static void CAProcessReceivedData(CAData_t *data)
 348 {
 349     OIC_LOG(DEBUG, TAG, "CAProcessReceivedData IN");
 350     if (!data)
 351     {
 352         OIC_LOG(ERROR, TAG, "thread data error!!");
 353         return;
 354     }
 355
 356     // parse the data and call the callbacks.
 357     // #1 parse the data
 358     // #2 get endpoint
 359     CAEndpoint_t *rep = (CAEndpoint_t *)(data->remoteEndpoint);
 360     if (!rep)
 361     {
 362         OIC_LOG(ERROR, TAG, "remoteEndpoint error!!");
 363         return;
 364     }
 365
 366     if (data->requestInfo && g_requestHandler)
 367     {
 368         g_requestHandler(rep, data->requestInfo);
 369     }
 370     else if (data->responseInfo && g_responseHandler)
 371     {
 372         g_responseHandler(rep, data->responseInfo);
 373     }
 374     else if (data->errorInfo && g_errorHandler)
 375     {
 376         g_errorHandler(rep, data->errorInfo);
 377     }
 378
 379 #ifdef SINGLE_THREAD
 380     CADestroyData(data, sizeof(CAData_t));
 381 #endif
 382
 383     OIC_LOG(DEBUG, TAG, "CAProcessReceivedData OUT");
 384 }
 385 #endif
 386
 387 #ifndef SINGLE_THREAD
 388
 389 static void CAReceiveThreadProcess(void *threadData)
 390 {
 391 #ifndef SINGLE_HANDLE
 392     CAData_t *data = (CAData_t *) threadData;
 393     CAProcessReceivedData(data);
 394 #else
 395     (void)threadData;
 396 #endif
 397 }
 398 #endif
 399
 400 static CAResult_t CAProcessSendData(const CAData_t *data)
 401 {
 402     VERIFY_NON_NULL(data, TAG, "data");
 403     VERIFY_NON_NULL(data->remoteEndpoint, TAG, "remoteEndpoint");
 404
 405     CAResult_t res = CA_STATUS_FAILED;
 406
 407     CASendDataType_t type = data->type;
 408
 409     coap_pdu_t *pdu = NULL;
 410     CAInfo_t *info = NULL;
 411     coap_list_t *options = NULL;
 412     coap_transport_type transport;
 413
 414     if (SEND_TYPE_UNICAST == type)
 415     {
 416         OIC_LOG(DEBUG,TAG,"Unicast message");
 417 #ifdef ROUTING_GATEWAY
 418         /*
 419          * When forwarding a packet, do not attempt retransmission as its the responsibility of
 420          * packet originator node
 421          */
 422         bool skipRetransmission = false;
 423 #endif
 424
 425         if (NULL != data->requestInfo)
 426         {
 427             OIC_LOG(DEBUG, TAG, "requestInfo is available..");
 428
 429             info = &data->requestInfo->info;
 430 #ifdef ROUTING_GATEWAY
 431             skipRetransmission = data->requestInfo->info.skipRetransmission;
 432 #endif
 433             pdu = CAGeneratePDU(data->requestInfo->method, info, data->remoteEndpoint,
 434                                 &options, &transport);
 435         }
 436         else if (NULL != data->responseInfo)
 437         {
 438             OIC_LOG(DEBUG, TAG, "responseInfo is available..");
 439
 440             info = &data->responseInfo->info;
 441 #ifdef ROUTING_GATEWAY
 442             skipRetransmission = data->responseInfo->info.skipRetransmission;
 443 #endif
 444             pdu = CAGeneratePDU(data->responseInfo->result, info, data->remoteEndpoint,
 445                                 &options, &transport);
 446         }
 447         else
 448         {
 449             OIC_LOG(DEBUG, TAG, "request info, response info is empty");
 450             return CA_STATUS_INVALID_PARAM;
 451         }
 452
 453         // interface controller function call.
 454         if (NULL != pdu)
 455         {
 456 #ifdef WITH_BWT
 457             if (CA_ADAPTER_GATT_BTLE != data->remoteEndpoint->adapter
 458 #ifdef TCP_ADAPTER
 459                     && CA_ADAPTER_TCP != data->remoteEndpoint->adapter
 460 #endif
 461                     )
 462             {
 463                 // Blockwise transfer
 464                 if (NULL != info)
 465                 {
 466                     CAResult_t res = CAAddBlockOption(&pdu, info,
 467                                                       data->remoteEndpoint,
 468                                                       &options);
 469                     if (CA_STATUS_OK != res)
 470                     {
 471                         OIC_LOG(INFO, TAG, "to write block option has failed");
 472                         CAErrorHandler(data->remoteEndpoint, pdu->hdr, pdu->length, res);
 473                         coap_delete_list(options);
 474                         coap_delete_pdu(pdu);
 475                         return res;
 476                     }
 477                 }
 478             }
 479 #endif
 480             CALogPDUInfo(pdu, data->remoteEndpoint);
 481
 482             res = CASendUnicastData(data->remoteEndpoint, pdu->hdr, pdu->length);
 483             if (CA_STATUS_OK != res)
 484             {
 485                 OIC_LOG_V(ERROR, TAG, "send failed:%d", res);
 486                 CAErrorHandler(data->remoteEndpoint, pdu->hdr, pdu->length, res);
 487                 coap_delete_list(options);
 488                 coap_delete_pdu(pdu);
 489                 return res;
 490             }
 491
 492 #ifdef TCP_ADAPTER
 493             if (CA_ADAPTER_TCP == data->remoteEndpoint->adapter)
 494             {
 495                 OIC_LOG(INFO, TAG, "retransmission will be not worked");
 496             }
 497             else
 498 #endif
 499 #ifdef ROUTING_GATEWAY
 500             if(!skipRetransmission)
 501 #endif
 502             {
 503                 // for retransmission
 504                 res = CARetransmissionSentData(&g_retransmissionContext, data->remoteEndpoint,
 505                                                pdu->hdr, pdu->length);
 506                 if ((CA_STATUS_OK != res) && (CA_NOT_SUPPORTED != res))
 507                 {
 508                     //when retransmission not supported this will return CA_NOT_SUPPORTED, ignore
 509                     OIC_LOG_V(INFO, TAG, "retransmission is not enabled due to error, res : %d", res);
 510                     coap_delete_list(options);
 511                     coap_delete_pdu(pdu);
 512                     return res;
 513                 }
 514             }
 515
 516             coap_delete_list(options);
 517             coap_delete_pdu(pdu);
 518         }
 519         else
 520         {
 521             OIC_LOG(ERROR,TAG,"Failed to generate unicast PDU");
 522             CASendErrorInfo(data->remoteEndpoint, info, CA_SEND_FAILED);
 523             return CA_SEND_FAILED;
 524         }
 525     }
 526     else if (SEND_TYPE_MULTICAST == type)
 527     {
 528         OIC_LOG(DEBUG,TAG,"Multicast message");
 529         if (NULL != data->requestInfo)
 530         {
 531             OIC_LOG(DEBUG, TAG, "requestInfo is available..");
 532
 533             info = &data->requestInfo->info;
 534             pdu = CAGeneratePDU(CA_GET, info, data->remoteEndpoint, &options, &transport);
 535
 536             if (NULL != pdu)
 537             {
 538 #ifdef WITH_BWT
 539                 if (CA_ADAPTER_GATT_BTLE != data->remoteEndpoint->adapter
 540 #ifdef TCP_ADAPTER
 541                         && CA_ADAPTER_TCP != data->remoteEndpoint->adapter
 542 #endif
 543                         )
 544                 {
 545                     // Blockwise transfer
 546                     CAResult_t res = CAAddBlockOption(&pdu, &data->requestInfo->info,
 547                                                       data->remoteEndpoint,
 548                                                       &options);
 549                     if (CA_STATUS_OK != res)
 550                     {
 551                         OIC_LOG(DEBUG, TAG, "CAAddBlockOption has failed");
 552                         CAErrorHandler(data->remoteEndpoint, pdu->hdr, pdu->length, res);
 553                         coap_delete_list(options);
 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                                 &options, &transport);
 574
 575             if (NULL != pdu)
 576             {
 577 #ifdef WITH_BWT
 578                 if (CA_ADAPTER_GATT_BTLE != data->remoteEndpoint->adapter
 579 #ifdef TCP_ADAPTER
 580                         && CA_ADAPTER_TCP != data->remoteEndpoint->adapter
 581 #endif
 582                         )
 583                 {
 584                     // Blockwise transfer
 585                     if (NULL != info)
 586                     {
 587                         CAResult_t res = CAAddBlockOption(&pdu, info,
 588                                                           data->remoteEndpoint,
 589                                                           &options);
 590                         if (CA_STATUS_OK != res)
 591                         {
 592                             OIC_LOG(INFO, TAG, "to write block option has failed");
 593                             CAErrorHandler(data->remoteEndpoint, pdu->hdr, pdu->length, res);
 594                             coap_delete_list(options);
 595                             coap_delete_pdu(pdu);
 596                             return res;
 597                         }
 598                     }
 599                 }
 600 #endif
 601             }
 602             else
 603             {
 604                 OIC_LOG(ERROR,TAG,"Failed to generate multicast PDU");
 605                 CASendErrorInfo(data->remoteEndpoint, info, CA_SEND_FAILED);
 606                 return CA_SEND_FAILED;
 607             }
 608         }
 609         else
 610         {
 611             OIC_LOG(ERROR, TAG, "request or response info is empty");
 612             return CA_SEND_FAILED;
 613         }
 614
 615         CALogPDUInfo(pdu, data->remoteEndpoint);
 616
 617         OIC_LOG(DEBUG, TAG, "pdu to send :");
 618         OIC_LOG_BUFFER(DEBUG, TAG,  pdu->hdr, pdu->length);
 619
 620         res = CASendMulticastData(data->remoteEndpoint, pdu->hdr, pdu->length);
 621         if (CA_STATUS_OK != res)
 622         {
 623             OIC_LOG_V(ERROR, TAG, "send failed:%d", res);
 624             CAErrorHandler(data->remoteEndpoint, pdu->hdr, pdu->length, res);
 625             coap_delete_list(options);
 626             coap_delete_pdu(pdu);
 627             return res;
 628         }
 629
 630         coap_delete_list(options);
 631         coap_delete_pdu(pdu);
 632     }
 633
 634     return CA_STATUS_OK;
 635 }
 636
 637 #ifndef SINGLE_THREAD
 638 static void CASendThreadProcess(void *threadData)
 639 {
 640     CAData_t *data = (CAData_t *) threadData;
 641     CAProcessSendData(data);
 642 }
 643
 644 #endif
 645
 646 /*
 647  * If a second message arrives with the same message ID, token and the other address
 648  * family, drop it.  Typically, IPv6 beats IPv4, so the IPv4 message is dropped.
 649  */
 650 static bool CADropSecondMessage(CAHistory_t *history, const CAEndpoint_t *ep, uint16_t id,
 651                                 CAToken_t token, uint8_t tokenLength)
 652 {
 653     if (!ep)
 654     {
 655         return true;
 656     }
 657     if (ep->adapter != CA_ADAPTER_IP)
 658     {
 659         return false;
 660     }
 661     if (!caglobals.ip.dualstack)
 662     {
 663         return false;
 664     }
 665
 666     if (tokenLength > CA_MAX_TOKEN_LEN)
 667     {
 668         /*
 669          * If token length is more than CA_MAX_TOKEN_LEN,
 670          * we compare the first CA_MAX_TOKEN_LEN bytes only.
 671          */
 672         tokenLength = CA_MAX_TOKEN_LEN;
 673     }
 674
 675     bool ret = false;
 676     CATransportFlags_t familyFlags = ep->flags & CA_IPFAMILY_MASK;
 677
 678     for (size_t i = 0; i < sizeof(history->items) / sizeof(history->items[0]); i++)
 679     {
 680         CAHistoryItem_t *item = &(history->items[i]);
 681         if (id == item->messageId && tokenLength == item->tokenLength
 682             && memcmp(item->token, token, tokenLength) == 0)
 683         {
 684             if ((familyFlags ^ item->flags) == CA_IPFAMILY_MASK)
 685             {
 686                 OIC_LOG_V(INFO, TAG, "IPv%c duplicate message ignored",
 687                                             familyFlags & CA_IPV6 ? '6' : '4');
 688                 ret = true;
 689                 break;
 690             }
 691         }
 692     }
 693
 694     history->items[history->nextIndex].flags = familyFlags;
 695     history->items[history->nextIndex].messageId = id;
 696     if (token && tokenLength)
 697     {
 698         memcpy(history->items[history->nextIndex].token, token, tokenLength);
 699         history->items[history->nextIndex].tokenLength = tokenLength;
 700     }
 701
 702     if (++history->nextIndex >= HISTORYSIZE)
 703     {
 704         history->nextIndex = 0;
 705     }
 706
 707     return ret;
 708 }
 709
 710 static void CAReceivedPacketCallback(const CASecureEndpoint_t *sep,
 711                                      const void *data, uint32_t dataLen)
 712 {
 713     VERIFY_NON_NULL_VOID(sep, TAG, "remoteEndpoint");
 714     VERIFY_NON_NULL_VOID(data, TAG, "data");
 715
 716     OIC_LOG(DEBUG, TAG, "received pdu data :");
 717     OIC_LOG_BUFFER(DEBUG, TAG,  data, dataLen);
 718
 719     uint32_t code = CA_NOT_FOUND;
 720     CAData_t *cadata = NULL;
 721
 722     coap_pdu_t *pdu = (coap_pdu_t *) CAParsePDU((const char *) data, dataLen, &code,
 723                                                 &(sep->endpoint));
 724     if (NULL == pdu)
 725     {
 726         OIC_LOG(ERROR, TAG, "Parse PDU failed");
 727         return;
 728     }
 729
 730     OIC_LOG_V(DEBUG, TAG, "code = %d", code);
 731     if (CA_GET == code || CA_POST == code || CA_PUT == code || CA_DELETE == code)
 732     {
 733         cadata = CAGenerateHandlerData(&(sep->endpoint), &(sep->identity), pdu, CA_REQUEST_DATA);
 734         if (!cadata)
 735         {
 736             OIC_LOG(ERROR, TAG, "CAReceivedPacketCallback, CAGenerateHandlerData failed!");
 737             coap_delete_pdu(pdu);
 738             return;
 739         }
 740     }
 741     else
 742     {
 743         cadata = CAGenerateHandlerData(&(sep->endpoint), &(sep->identity), pdu, CA_RESPONSE_DATA);
 744         if (!cadata)
 745         {
 746             OIC_LOG(ERROR, TAG, "CAReceivedPacketCallback, CAGenerateHandlerData failed!");
 747             coap_delete_pdu(pdu);
 748             return;
 749         }
 750
 751 #ifdef TCP_ADAPTER
 752         if (CA_ADAPTER_TCP == sep->endpoint.adapter)
 753         {
 754             OIC_LOG(INFO, TAG, "retransmission is not supported");
 755         }
 756         else
 757 #endif
 758         {
 759             // for retransmission
 760             void *retransmissionPdu = NULL;
 761             CARetransmissionReceivedData(&g_retransmissionContext, cadata->remoteEndpoint, pdu->hdr,
 762                                          pdu->length, &retransmissionPdu);
 763
 764             // get token from saved data in retransmission list
 765             if (retransmissionPdu && CA_EMPTY == code)
 766             {
 767                 if (cadata->responseInfo)
 768                 {
 769                     CAInfo_t *info = &cadata->responseInfo->info;
 770                     CAResult_t res = CAGetTokenFromPDU((const coap_hdr_t *)retransmissionPdu,
 771                                                        info, &(sep->endpoint));
 772                     if (CA_STATUS_OK != res)
 773                     {
 774                         OIC_LOG(ERROR, TAG, "fail to get Token from retransmission list");
 775                         OICFree(info->token);
 776                         info->tokenLength = 0;
 777                     }
 778                 }
 779             }
 780             OICFree(retransmissionPdu);
 781         }
 782     }
 783
 784     cadata->type = SEND_TYPE_UNICAST;
 785
 786 #ifdef SINGLE_THREAD
 787     CAProcessReceivedData(cadata);
 788 #else
 789 #ifdef WITH_BWT
 790     if (CA_ADAPTER_GATT_BTLE != sep->endpoint.adapter
 791 #ifdef TCP_ADAPTER
 792             && CA_ADAPTER_TCP != sep->endpoint.adapter
 793 #endif
 794             )
 795     {
 796         CAResult_t res = CAReceiveBlockWiseData(pdu, &(sep->endpoint), cadata, dataLen);
 797         if (CA_NOT_SUPPORTED == res)
 798         {
 799             OIC_LOG(ERROR, TAG, "this message does not have block option");
 800             CAQueueingThreadAddData(&g_receiveThread, cadata, sizeof(CAData_t));
 801         }
 802         else
 803         {
 804             CADestroyData(cadata, sizeof(CAData_t));
 805         }
 806     }
 807     else
 808 #endif
 809     {
 810         CAQueueingThreadAddData(&g_receiveThread, cadata, sizeof(CAData_t));
 811     }
 812 #endif
 813
 814     coap_delete_pdu(pdu);
 815 }
 816
 817 static void CANetworkChangedCallback(const CAEndpoint_t *info, CANetworkStatus_t status)
 818 {
 819     (void)info;
 820     (void)status;
 821     OIC_LOG(DEBUG, TAG, "IN");
 822
 823     OIC_LOG(DEBUG, TAG, "OUT");
 824 }
 825
 826 void CAHandleRequestResponseCallbacks()
 827 {
 828 #ifdef SINGLE_THREAD
 829     CAReadData();
 830     CARetransmissionBaseRoutine((void *)&g_retransmissionContext);
 831 #else
 832 #ifdef SINGLE_HANDLE
 833     // parse the data and call the callbacks.
 834     // #1 parse the data
 835     // #2 get endpoint
 836
 837     ca_mutex_lock(g_receiveThread.threadMutex);
 838
 839     u_queue_message_t *item = u_queue_get_element(g_receiveThread.dataQueue);
 840
 841     ca_mutex_unlock(g_receiveThread.threadMutex);
 842
 843     if (NULL == item)
 844     {
 845         return;
 846     }
 847
 848     // get values
 849     void *msg = item->msg;
 850
 851     if (NULL == msg)
 852     {
 853         return;
 854     }
 855
 856     // get endpoint
 857     CAData_t *td = (CAData_t *) msg;
 858
 859     if (td->requestInfo && g_requestHandler)
 860     {
 861         OIC_LOG_V(DEBUG, TAG, "request callback : %d", td->requestInfo->info.numOptions);
 862         g_requestHandler(td->remoteEndpoint, td->requestInfo);
 863     }
 864     else if (td->responseInfo && g_responseHandler)
 865     {
 866         OIC_LOG_V(DEBUG, TAG, "response callback : %d", td->responseInfo->info.numOptions);
 867         g_responseHandler(td->remoteEndpoint, td->responseInfo);
 868     }
 869     else if (td->errorInfo && g_errorHandler)
 870     {
 871         OIC_LOG_V(DEBUG, TAG, "error callback error: %d", td->errorInfo->result);
 872         g_errorHandler(td->remoteEndpoint, td->errorInfo);
 873     }
 874
 875     CADestroyData(msg, sizeof(CAData_t));
 876     OICFree(item);
 877
 878 #endif /* SINGLE_HANDLE */
 879 #endif
 880 }
 881
 882 static CAData_t* CAPrepareSendData(const CAEndpoint_t *endpoint, const void *sendData,
 883                                    CADataType_t dataType)
 884 {
 885     OIC_LOG(DEBUG, TAG, "CAPrepareSendData IN");
 886
 887     CAData_t *cadata = (CAData_t *) OICCalloc(1, sizeof(CAData_t));
 888     if (!cadata)
 889     {
 890         OIC_LOG(ERROR, TAG, "memory allocation failed");
 891         return NULL;
 892     }
 893
 894     if(CA_REQUEST_DATA == dataType)
 895     {
 896         // clone request info
 897         CARequestInfo_t *request = CACloneRequestInfo((CARequestInfo_t *)sendData);
 898
 899         if(!request)
 900         {
 901             OIC_LOG(ERROR, TAG, "CACloneRequestInfo failed");
 902             OICFree(cadata);
 903             return NULL;
 904         }
 905
 906         cadata->type = request->isMulticast ? SEND_TYPE_MULTICAST : SEND_TYPE_UNICAST;
 907         cadata->requestInfo =  request;
 908     }
 909     else if(CA_RESPONSE_DATA == dataType)
 910     {
 911         // clone response info
 912         CAResponseInfo_t *response = CACloneResponseInfo((CAResponseInfo_t *)sendData);
 913
 914         if(!response)
 915         {
 916             OIC_LOG(ERROR, TAG, "CACloneResponseInfo failed");
 917             OICFree(cadata);
 918             return NULL;
 919         }
 920
 921         cadata->type = response->isMulticast ? SEND_TYPE_MULTICAST : SEND_TYPE_UNICAST;
 922         cadata->responseInfo = response;
 923     }
 924     else
 925     {
 926         OIC_LOG(ERROR, TAG, "CAPrepareSendData unknown data type");
 927         OICFree(cadata);
 928         return NULL;
 929     }
 930
 931     CAEndpoint_t* ep = CACloneEndpoint(endpoint);
 932     if (!ep)
 933     {
 934         OIC_LOG(ERROR, TAG, "endpoint clone failed");
 935         CADestroyData(cadata, sizeof(CAData_t));
 936         return NULL;
 937     }
 938
 939     cadata->remoteEndpoint = ep;
 940     cadata->dataType = dataType;
 941     return cadata;
 942 }
 943
 944 CAResult_t CADetachRequestMessage(const CAEndpoint_t *object, const CARequestInfo_t *request)
 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     return CA_STATUS_OK;
1009 }
1010
1011 CAResult_t CADetachResponseMessage(const CAEndpoint_t *object,
1012                                    const CAResponseInfo_t *response)
1013 {
1014     VERIFY_NON_NULL(object, TAG, "object");
1015     VERIFY_NON_NULL(response, TAG, "response");
1016
1017     if (false == CAIsSelectedNetworkAvailable())
1018     {
1019         return CA_STATUS_FAILED;
1020     }
1021
1022     CAData_t *data = CAPrepareSendData(object, response, CA_RESPONSE_DATA);
1023     if(!data)
1024     {
1025         OIC_LOG(ERROR, TAG, "CAPrepareSendData failed");
1026         return CA_MEMORY_ALLOC_FAILED;
1027     }
1028
1029 #ifdef SINGLE_THREAD
1030     CAResult_t result = CAProcessSendData(data);
1031     if(result != CA_STATUS_OK)
1032     {
1033         OIC_LOG(ERROR, TAG, "CAProcessSendData failed");
1034         return result;
1035     }
1036
1037     CADestroyData(data, sizeof(CAData_t));
1038 #else
1039 #ifdef WITH_BWT
1040     if (CA_ADAPTER_GATT_BTLE != object->adapter
1041 #ifdef TCP_ADAPTER
1042             && CA_ADAPTER_TCP != object->adapter
1043 #endif
1044             )
1045     {
1046         // send block data
1047         CAResult_t res = CASendBlockWiseData(data);
1048         if(CA_NOT_SUPPORTED == res)
1049         {
1050             OIC_LOG(DEBUG, TAG, "normal msg will be sent");
1051             CAQueueingThreadAddData(&g_sendThread, data, sizeof(CAData_t));
1052             return CA_STATUS_OK;
1053         }
1054         else
1055         {
1056             CADestroyData(data, sizeof(CAData_t));
1057         }
1058         return res;
1059     }
1060     else
1061 #endif
1062     {
1063         CAQueueingThreadAddData(&g_sendThread, data, sizeof(CAData_t));
1064     }
1065 #endif
1066
1067     return CA_STATUS_OK;
1068 }
1069
1070 CAResult_t CADetachMessageResourceUri(const CAURI_t resourceUri, const CAToken_t token,
1071                                       uint8_t tokenLength, const CAHeaderOption_t *options,
1072                                       uint8_t numOptions)
1073 {
1074     (void)resourceUri;
1075     (void)token;
1076     (void)tokenLength;
1077     (void)options;
1078     (void)numOptions;
1079     return CA_NOT_SUPPORTED;
1080 }
1081
1082 void CASetInterfaceCallbacks(CARequestCallback ReqHandler, CAResponseCallback RespHandler,
1083                              CAErrorCallback errorHandler)
1084 {
1085     g_requestHandler = ReqHandler;
1086     g_responseHandler = RespHandler;
1087     g_errorHandler = errorHandler;
1088 }
1089
1090 CAResult_t CAInitializeMessageHandler()
1091 {
1092     CASetPacketReceivedCallback(CAReceivedPacketCallback);
1093
1094     CASetNetworkChangeCallback(CANetworkChangedCallback);
1095     CASetErrorHandleCallback(CAErrorHandler);
1096
1097 #ifndef SINGLE_THREAD
1098     // create thread pool
1099     CAResult_t res = ca_thread_pool_init(MAX_THREAD_POOL_SIZE, &g_threadPoolHandle);
1100
1101     if (CA_STATUS_OK != res)
1102     {
1103         OIC_LOG(ERROR, TAG, "thread pool initialize error.");
1104         return res;
1105     }
1106
1107     // send thread initialize
1108     if (CA_STATUS_OK != CAQueueingThreadInitialize(&g_sendThread, g_threadPoolHandle,
1109                                                    CASendThreadProcess, CADestroyData))
1110     {
1111         OIC_LOG(ERROR, TAG, "Failed to Initialize send queue thread");
1112         return CA_STATUS_FAILED;
1113     }
1114
1115     // start send thread
1116     res = CAQueueingThreadStart(&g_sendThread);
1117
1118     if (CA_STATUS_OK != res)
1119     {
1120         OIC_LOG(ERROR, TAG, "thread start error(send thread).");
1121         ca_thread_pool_free(g_threadPoolHandle);
1122         g_threadPoolHandle = NULL;
1123         return res;
1124     }
1125
1126     // receive thread initialize
1127     if (CA_STATUS_OK != CAQueueingThreadInitialize(&g_receiveThread, g_threadPoolHandle,
1128                                                    CAReceiveThreadProcess, CADestroyData))
1129     {
1130         OIC_LOG(ERROR, TAG, "Failed to Initialize receive queue thread");
1131         return CA_STATUS_FAILED;
1132     }
1133
1134 #ifndef SINGLE_HANDLE // This will be enabled when RI supports multi threading
1135     // start receive thread
1136     res = CAQueueingThreadStart(&gReceiveThread);
1137
1138     if (res != CA_STATUS_OK)
1139     {
1140         OIC_LOG(ERROR, TAG, "thread start error(receive thread).");
1141         return res;
1142     }
1143 #endif /* SINGLE_HANDLE */
1144
1145     // retransmission initialize
1146     CARetransmissionInitialize(&g_retransmissionContext, g_threadPoolHandle, CASendUnicastData,
1147                                CATimeoutCallback, NULL);
1148
1149 #ifdef WITH_BWT
1150     // block-wise transfer initialize
1151     CAInitializeBlockWiseTransfer(CAAddDataToSendThread, CAAddDataToReceiveThread);
1152 #endif
1153
1154     // start retransmission
1155     res = CARetransmissionStart(&g_retransmissionContext);
1156
1157     if (CA_STATUS_OK != res)
1158     {
1159         OIC_LOG(ERROR, TAG, "thread start error(retransmission thread).");
1160         return res;
1161     }
1162
1163     // initialize interface adapters by controller
1164     CAInitializeAdapters(g_threadPoolHandle);
1165 #else
1166     // retransmission initialize
1167     CARetransmissionInitialize(&g_retransmissionContext, NULL, CASendUnicastData,
1168                                CATimeoutCallback, NULL);
1169     CAInitializeAdapters();
1170 #endif
1171
1172     return CA_STATUS_OK;
1173 }
1174
1175 void CATerminateMessageHandler()
1176 {
1177 #ifndef SINGLE_THREAD
1178     CATransportAdapter_t connType;
1179     u_arraylist_t *list = CAGetSelectedNetworkList();
1180     uint32_t length = u_arraylist_length(list);
1181
1182     uint32_t i = 0;
1183     for (i = 0; i < length; i++)
1184     {
1185         void* ptrType = u_arraylist_get(list, i);
1186
1187         if (NULL == ptrType)
1188         {
1189             continue;
1190         }
1191
1192         connType = *(CATransportAdapter_t *)ptrType;
1193         CAStopAdapter(connType);
1194     }
1195
1196     // stop retransmission
1197     if (NULL != g_retransmissionContext.threadMutex)
1198     {
1199         CARetransmissionStop(&g_retransmissionContext);
1200     }
1201
1202     // stop thread
1203     // delete thread data
1204     if (NULL != g_sendThread.threadMutex)
1205     {
1206         CAQueueingThreadStop(&g_sendThread);
1207     }
1208
1209     // stop thread
1210     // delete thread data
1211     if (NULL != g_receiveThread.threadMutex)
1212     {
1213 #ifndef SINGLE_HANDLE // This will be enabled when RI supports multi threading
1214         CAQueueingThreadStop(&gReceiveThread);
1215 #endif /* SINGLE_HANDLE */
1216     }
1217
1218     // destroy thread pool
1219     if (NULL != g_threadPoolHandle)
1220     {
1221         ca_thread_pool_free(g_threadPoolHandle);
1222         g_threadPoolHandle = NULL;
1223     }
1224
1225 #ifdef WITH_BWT
1226     CATerminateBlockWiseTransfer();
1227 #endif
1228     CARetransmissionDestroy(&g_retransmissionContext);
1229     CAQueueingThreadDestroy(&g_sendThread);
1230     CAQueueingThreadDestroy(&g_receiveThread);
1231
1232     // terminate interface adapters by controller
1233     CATerminateAdapters();
1234 #else
1235     // terminate interface adapters by controller
1236     CATerminateAdapters();
1237
1238     // stop retransmission
1239     CARetransmissionStop(&g_retransmissionContext);
1240     CARetransmissionDestroy(&g_retransmissionContext);
1241 #endif
1242 }
1243
1244 void CALogPDUInfo(coap_pdu_t *pdu, const CAEndpoint_t *endpoint)
1245 {
1246     VERIFY_NON_NULL_VOID(pdu, TAG, "pdu");
1247
1248     OIC_LOG_V(DEBUG, TAG, "PDU Maker - payload : %s", pdu->data);
1249
1250 #ifdef TCP_ADAPTER
1251     if (CA_ADAPTER_TCP == endpoint->adapter)
1252     {
1253         OIC_LOG(DEBUG, TAG, "pdu header data :");
1254         OIC_LOG_BUFFER(DEBUG, TAG,  pdu->hdr, pdu->length);
1255     }
1256     else
1257 #endif
1258     {
1259         OIC_LOG_V(DEBUG, TAG, "PDU Maker - type : %d", pdu->hdr->coap_hdr_udp_t.type);
1260
1261         OIC_LOG_V(DEBUG, TAG, "PDU Maker - code : %d", pdu->hdr->coap_hdr_udp_t.code);
1262
1263         OIC_LOG(DEBUG, TAG, "PDU Maker - token :");
1264
1265         OIC_LOG_BUFFER(DEBUG, TAG, pdu->hdr->coap_hdr_udp_t.token,
1266                        pdu->hdr->coap_hdr_udp_t.token_length);
1267     }
1268 }
1269
1270 static void CALogPayloadInfo(CAInfo_t *info)
1271 {
1272     if(info)
1273     {
1274         if (info->options)
1275         {
1276             for (uint32_t i = 0; i < info->numOptions; i++)
1277             {
1278                 OIC_LOG_V(DEBUG, TAG, "optionID: %d", info->options[i].optionID);
1279
1280                 OIC_LOG_V(DEBUG, TAG, "list: %s", info->options[i].optionData);
1281             }
1282         }
1283
1284         if (info->payload)
1285         {
1286             OIC_LOG_V(DEBUG, TAG, "payload: %p(%u)", info->payload,
1287                       info->payloadSize);
1288         }
1289
1290         if (info->token)
1291         {
1292             OIC_LOG(DEBUG, TAG, "token:");
1293             OIC_LOG_BUFFER(DEBUG, TAG, (const uint8_t *) info->token,
1294                            info->tokenLength);
1295         }
1296         OIC_LOG_V(DEBUG, TAG, "msgID: %d", info->messageId);
1297     }
1298     else
1299     {
1300         OIC_LOG(DEBUG, TAG, "info is NULL, cannot output log data");
1301     }
1302 }
1303
1304 void CAErrorHandler(const CAEndpoint_t *endpoint,
1305                     const void *data, uint32_t dataLen,
1306                     CAResult_t result)
1307 {
1308     OIC_LOG(DEBUG, TAG, "CAErrorHandler IN");
1309
1310 #ifndef SINGLE_THREAD
1311
1312     VERIFY_NON_NULL_VOID(endpoint, TAG, "remoteEndpoint");
1313     VERIFY_NON_NULL_VOID(data, TAG, "data");
1314
1315     uint32_t code = CA_NOT_FOUND;
1316     //Do not free remoteEndpoint and data. Currently they will be freed in data thread
1317     //Get PDU data
1318     coap_pdu_t *pdu = (coap_pdu_t *)CAParsePDU((const char *)data, dataLen, &code, endpoint);
1319     if (NULL == pdu)
1320     {
1321         OIC_LOG(ERROR, TAG, "Parse PDU failed");
1322         return;
1323     }
1324
1325     CAData_t *cadata = CAGenerateHandlerData(endpoint, NULL, pdu, CA_ERROR_DATA);
1326     if(!cadata)
1327     {
1328         OIC_LOG(ERROR, TAG, "CAErrorHandler, CAGenerateHandlerData failed!");
1329         coap_delete_pdu(pdu);
1330         return;
1331     }
1332
1333     cadata->errorInfo->result = result;
1334
1335     CAQueueingThreadAddData(&g_receiveThread, cadata, sizeof(CAData_t));
1336     coap_delete_pdu(pdu);
1337 #endif
1338
1339     OIC_LOG(DEBUG, TAG, "CAErrorHandler OUT");
1340     return;
1341 }
1342
1343 static void CASendErrorInfo(const CAEndpoint_t *endpoint, const CAInfo_t *info, CAResult_t result)
1344 {
1345     OIC_LOG(DEBUG, TAG, "CASendErrorInfo IN");
1346 #ifndef SINGLE_THREAD
1347     CAData_t *cadata = (CAData_t *) OICCalloc(1, sizeof(CAData_t));
1348     if (!cadata)
1349     {
1350         OIC_LOG(ERROR, TAG, "memory allocation failed");
1351         return;
1352     }
1353
1354     CAEndpoint_t* ep = CACloneEndpoint(endpoint);
1355     if (!ep)
1356     {
1357         OIC_LOG(ERROR, TAG, "endpoint clone failed");
1358         OICFree(cadata);
1359         return;
1360     }
1361
1362     CAErrorInfo_t *errorInfo = (CAErrorInfo_t *)OICCalloc(1, sizeof (CAErrorInfo_t));
1363     if (!errorInfo)
1364     {
1365         OICFree(cadata);
1366         CAFreeEndpoint(ep);
1367         return;
1368     }
1369
1370     CAResult_t res = CACloneInfo(info, &errorInfo->info);
1371     if (CA_STATUS_OK != res)
1372     {
1373         OICFree(cadata);
1374         OICFree(errorInfo);
1375         CAFreeEndpoint(ep);
1376         return;
1377     }
1378
1379     errorInfo->result = result;
1380     cadata->remoteEndpoint = ep;
1381     cadata->errorInfo = errorInfo;
1382     cadata->dataType = CA_ERROR_DATA;
1383
1384     CAQueueingThreadAddData(&g_receiveThread, cadata, sizeof(CAData_t));
1385 #endif
1386     OIC_LOG(DEBUG, TAG, "CASendErrorInfo OUT");
1387 }