resource/csdk/connectivity/src/camessagehandler.c

   1 /* *****************************************************************
   2  *
   3  * Copyright 2014 Samsung Electronics All Rights Reserved.
   4  *
   5  *
   6  *
   7  * Licensed under the Apache License, Version 2.0 (the "License");
   8  * you may not use this file except in compliance with the License.
   9  * You may obtain a copy of the License at
  10  *
  11  *      http://www.apache.org/licenses/LICENSE-2.0
  12  *
  13  * Unless required by applicable law or agreed to in writing, software
  14  * distributed under the License is distributed on an "AS IS" BASIS,
  15  * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
  16  * See the License for the specific language governing permissions and
  17  * limitations under the License.
  18  *
  19  ******************************************************************/
  20
  21 #include <stdio.h>
  22 #include <stdlib.h>
  23 #include <string.h>
  24 #include <stdint.h>
  25
  26 #include "cainterface.h"
  27 #include "camessagehandler.h"
  28 #include "caremotehandler.h"
  29 #include "caprotocolmessage.h"
  30 #include "logger.h"
  31 #include "config.h" /* for coap protocol */
  32 #include "oic_malloc.h"
  33 #include "canetworkconfigurator.h"
  34 #include "caadapterutils.h"
  35 #include "cainterfacecontroller.h"
  36 #include "caretransmission.h"
  37 #include "oic_string.h"
  38
  39 #ifdef WITH_BWT
  40 #include "cablockwisetransfer.h"
  41 #endif
  42
  43 #ifndef  SINGLE_THREAD
  44 #include "uqueue.h"
  45 #include "cathreadpool.h" /* for thread pool */
  46 #include "caqueueingthread.h"
  47
  48 #define SINGLE_HANDLE
  49 #define MAX_THREAD_POOL_SIZE    20
  50
  51 // thread pool handle
  52 static ca_thread_pool_t g_threadPoolHandle = NULL;
  53
  54 // message handler main thread
  55 static CAQueueingThread_t g_sendThread;
  56 static CAQueueingThread_t g_receiveThread;
  57
  58 #else
  59 #define CA_MAX_RT_ARRAY_SIZE    3
  60 #endif  // SINGLE_THREAD
  61
  62 #define TAG "OIC_CA_MSG_HANDLE"
  63
  64 static CARetransmission_t g_retransmissionContext;
  65
  66 // handler field
  67 static CARequestCallback g_requestHandler = NULL;
  68 static CAResponseCallback g_responseHandler = NULL;
  69 static CAErrorCallback g_errorHandler = NULL;
  70 static CANetworkMonitorCallback g_nwMonitorHandler = NULL;
  71
  72 static void CAErrorHandler(const CAEndpoint_t *endpoint,
  73                            const void *data, uint32_t dataLen,
  74                            CAResult_t result);
  75
  76 static CAData_t* CAGenerateHandlerData(const CAEndpoint_t *endpoint,
  77                                        const CARemoteId_t *identity,
  78                                        const void *data, CADataType_t dataType);
  79
  80 static void CASendErrorInfo(const CAEndpoint_t *endpoint, const CAInfo_t *info,
  81                             CAResult_t result);
  82
  83 #ifdef SINGLE_THREAD
  84 static void CAProcessReceivedData(CAData_t *data);
  85 #endif
  86 static void CADestroyData(void *data, uint32_t size);
  87 static void CALogPayloadInfo(CAInfo_t *info);
  88 static bool CADropSecondMessage(CAHistory_t *history, const CAEndpoint_t *endpoint, uint16_t id,
  89                                 CAToken_t token, uint8_t tokenLength);
  90
  91 #ifdef WITH_BWT
  92 void CAAddDataToSendThread(CAData_t *data)
  93 {
  94     VERIFY_NON_NULL_VOID(data, TAG, "data");
  95
  96     // add thread
  97     CAQueueingThreadAddData(&g_sendThread, data, sizeof(CAData_t));
  98 }
  99
 100 void CAAddDataToReceiveThread(CAData_t *data)
 101 {
 102     VERIFY_NON_NULL_VOID(data, TAG, "data");
 103
 104     // add thread
 105     CAQueueingThreadAddData(&g_receiveThread, data, sizeof(CAData_t));
 106 }
 107 #endif
 108
 109 static bool CAIsSelectedNetworkAvailable()
 110 {
 111     u_arraylist_t *list = CAGetSelectedNetworkList();
 112     if (!list || u_arraylist_length(list) == 0)
 113     {
 114         OIC_LOG(ERROR, TAG, "No selected network");
 115         return false;
 116     }
 117
 118     return true;
 119 }
 120
 121 static CAData_t* CAGenerateHandlerData(const CAEndpoint_t *endpoint,
 122                                        const CARemoteId_t *identity,
 123                                        const void *data, CADataType_t dataType)
 124 {
 125     OIC_LOG(DEBUG, TAG, "CAGenerateHandlerData IN");
 126     CAInfo_t *info = NULL;
 127     CAData_t *cadata = (CAData_t *) OICCalloc(1, sizeof(CAData_t));
 128     if (!cadata)
 129     {
 130         OIC_LOG(ERROR, TAG, "memory allocation failed");
 131         return NULL;
 132     }
 133
 134     CAEndpoint_t* ep = CACloneEndpoint(endpoint);
 135     if (!ep)
 136     {
 137         OIC_LOG(ERROR, TAG, "endpoint clone failed");
 138         goto exit;
 139     }
 140
 141     OIC_LOG_V(DEBUG, TAG, "address : %s", ep->addr);
 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             goto exit;
 150         }
 151
 152         CAResult_t result = CAGetResponseInfoFromPDU(data, resInfo, endpoint);
 153         if (CA_STATUS_OK != result)
 154         {
 155             OIC_LOG(ERROR, TAG, "CAGetResponseInfoFromPDU Failed");
 156             CADestroyResponseInfoInternal(resInfo);
 157             goto exit;
 158         }
 159         cadata->responseInfo = resInfo;
 160         info = &resInfo->info;
 161         if (identity)
 162         {
 163             info->identity = *identity;
 164         }
 165         OIC_LOG(DEBUG, TAG, "Response Info :");
 166         CALogPayloadInfo(info);
 167     }
 168     else if (CA_REQUEST_DATA == dataType)
 169     {
 170         CARequestInfo_t* reqInfo = (CARequestInfo_t*)OICCalloc(1, sizeof(CARequestInfo_t));
 171         if (!reqInfo)
 172         {
 173             OIC_LOG(ERROR, TAG, "memory allocation failed");
 174             goto exit;
 175         }
 176
 177         CAResult_t result = CAGetRequestInfoFromPDU(data, endpoint, reqInfo);
 178         if (CA_STATUS_OK != result)
 179         {
 180             OIC_LOG(ERROR, TAG, "CAGetRequestInfoFromPDU failed");
 181             CADestroyRequestInfoInternal(reqInfo);
 182             goto exit;
 183         }
 184
 185         if (CADropSecondMessage(&caglobals.ca.requestHistory, endpoint, reqInfo->info.messageId,
 186                                 reqInfo->info.token, reqInfo->info.tokenLength))
 187         {
 188             OIC_LOG(ERROR, TAG, "Second Request with same Token, Drop it");
 189             CADestroyRequestInfoInternal(reqInfo);
 190             goto exit;
 191         }
 192
 193         cadata->requestInfo = reqInfo;
 194         info = &reqInfo->info;
 195         if (identity)
 196         {
 197             info->identity = *identity;
 198         }
 199         OIC_LOG(DEBUG, TAG, "Request Info :");
 200         CALogPayloadInfo(info);
 201    }
 202     else if (CA_ERROR_DATA == dataType)
 203     {
 204         CAErrorInfo_t *errorInfo = (CAErrorInfo_t *)OICCalloc(1, sizeof (CAErrorInfo_t));
 205         if (!errorInfo)
 206         {
 207             OIC_LOG(ERROR, TAG, "Memory allocation failed!");
 208             goto exit;
 209         }
 210
 211         CAResult_t result = CAGetErrorInfoFromPDU(data, endpoint, errorInfo);
 212         if (CA_STATUS_OK != result)
 213         {
 214             OIC_LOG(ERROR, TAG, "CAGetErrorInfoFromPDU failed");
 215             OICFree(errorInfo);
 216             goto exit;
 217         }
 218
 219         cadata->errorInfo = errorInfo;
 220         info = &errorInfo->info;
 221         if (identity)
 222         {
 223             info->identity = *identity;
 224         }
 225         OIC_LOG(DEBUG, TAG, "error Info :");
 226         CALogPayloadInfo(info);
 227     }
 228
 229     cadata->remoteEndpoint = ep;
 230     cadata->dataType = dataType;
 231
 232     OIC_LOG(DEBUG, TAG, "CAGenerateHandlerData OUT");
 233     return cadata;
 234
 235 exit:
 236     OICFree(cadata);
 237     CAFreeEndpoint(ep);
 238     return NULL;
 239 }
 240
 241 static void CATimeoutCallback(const CAEndpoint_t *endpoint, const void *pdu, uint32_t size)
 242 {
 243     VERIFY_NON_NULL_VOID(endpoint, TAG, "endpoint");
 244     VERIFY_NON_NULL_VOID(pdu, TAG, "pdu");
 245
 246     CAEndpoint_t* ep = CACloneEndpoint(endpoint);
 247     if (!ep)
 248     {
 249         OIC_LOG(ERROR, TAG, "clone failed");
 250         return;
 251     }
 252
 253     CAResponseInfo_t* resInfo = (CAResponseInfo_t*)OICCalloc(1, sizeof(CAResponseInfo_t));
 254
 255     if (!resInfo)
 256     {
 257         OIC_LOG(ERROR, TAG, "calloc failed");
 258         CAFreeEndpoint(ep);
 259         return;
 260     }
 261
 262     resInfo->result = CA_RETRANSMIT_TIMEOUT;
 263     resInfo->info.type = CAGetMessageTypeFromPduBinaryData(pdu, size);
 264     resInfo->info.messageId = CAGetMessageIdFromPduBinaryData(pdu, size);
 265
 266     CAResult_t res = CAGetTokenFromPDU((const coap_hdr_t *) pdu, &(resInfo->info),
 267                                        endpoint);
 268     if (CA_STATUS_OK != res)
 269     {
 270         OIC_LOG(ERROR, TAG, "fail to get Token from retransmission list");
 271         CADestroyResponseInfoInternal(resInfo);
 272         CAFreeEndpoint(ep);
 273         return;
 274     }
 275
 276     CAData_t *cadata = (CAData_t *) OICCalloc(1, sizeof(CAData_t));
 277     if (NULL == cadata)
 278     {
 279         OIC_LOG(ERROR, TAG, "memory allocation failed !");
 280         CAFreeEndpoint(ep);
 281         CADestroyResponseInfoInternal(resInfo);
 282         return;
 283     }
 284
 285     cadata->type = SEND_TYPE_UNICAST;
 286     cadata->remoteEndpoint = ep;
 287     cadata->requestInfo = NULL;
 288     cadata->responseInfo = resInfo;
 289
 290 #ifdef WITH_BWT
 291     if (CAIsSupportedBlockwiseTransfer(endpoint->adapter))
 292     {
 293         res = CARemoveBlockDataFromListWithSeed(resInfo->info.token, resInfo->info.tokenLength,
 294                                                 endpoint->port);
 295         if (CA_STATUS_OK != res)
 296         {
 297             OIC_LOG(ERROR, TAG, "CARemoveBlockDataFromListWithSeed failed");
 298         }
 299     }
 300 #endif // WITH_BWT
 301
 302 #ifdef SINGLE_THREAD
 303     CAProcessReceivedData(cadata);
 304 #else
 305     CAQueueingThreadAddData(&g_receiveThread, cadata, sizeof(CAData_t));
 306 #endif
 307 }
 308
 309 static void CADestroyData(void *data, uint32_t size)
 310 {
 311     OIC_LOG(DEBUG, TAG, "CADestroyData IN");
 312     if ((size_t)size < sizeof(CAData_t))
 313     {
 314         OIC_LOG_V(ERROR, TAG, "Destroy data too small %p %d", data, size);
 315     }
 316     CAData_t *cadata = (CAData_t *) data;
 317
 318     if (NULL == cadata)
 319     {
 320         OIC_LOG(ERROR, TAG, "cadata is NULL");
 321         return;
 322     }
 323
 324     if (NULL != cadata->remoteEndpoint)
 325     {
 326         CAFreeEndpoint(cadata->remoteEndpoint);
 327     }
 328
 329     if (NULL != cadata->requestInfo)
 330     {
 331         CADestroyRequestInfoInternal((CARequestInfo_t *) cadata->requestInfo);
 332     }
 333
 334     if (NULL != cadata->responseInfo)
 335     {
 336         CADestroyResponseInfoInternal((CAResponseInfo_t *) cadata->responseInfo);
 337     }
 338
 339     if (NULL != cadata->errorInfo)
 340     {
 341         CADestroyErrorInfoInternal(cadata->errorInfo);
 342     }
 343
 344     OICFree(cadata);
 345     OIC_LOG(DEBUG, TAG, "CADestroyData OUT");
 346 }
 347
 348 #ifdef SINGLE_THREAD
 349 static void CAProcessReceivedData(CAData_t *data)
 350 {
 351     OIC_LOG(DEBUG, TAG, "CAProcessReceivedData IN");
 352     if (!data)
 353     {
 354         OIC_LOG(ERROR, TAG, "thread data error!!");
 355         return;
 356     }
 357
 358     // parse the data and call the callbacks.
 359     // #1 parse the data
 360     // #2 get endpoint
 361     CAEndpoint_t *rep = (CAEndpoint_t *)(data->remoteEndpoint);
 362     if (!rep)
 363     {
 364         OIC_LOG(ERROR, TAG, "remoteEndpoint error!!");
 365         return;
 366     }
 367
 368     if (data->requestInfo && g_requestHandler)
 369     {
 370         g_requestHandler(rep, data->requestInfo);
 371     }
 372     else if (data->responseInfo && g_responseHandler)
 373     {
 374         g_responseHandler(rep, data->responseInfo);
 375     }
 376     else if (data->errorInfo && g_errorHandler)
 377     {
 378         g_errorHandler(rep, data->errorInfo);
 379     }
 380
 381     CADestroyData(data, sizeof(CAData_t));
 382
 383     OIC_LOG(DEBUG, TAG, "CAProcessReceivedData OUT");
 384 }
 385 #endif
 386
 387 #ifndef SINGLE_THREAD
 388 static void CAReceiveThreadProcess(void *threadData)
 389 {
 390 #ifndef SINGLE_HANDLE
 391     CAData_t *data = (CAData_t *) threadData;
 392     CAProcessReceivedData(data);
 393 #else
 394     (void)threadData;
 395 #endif
 396 }
 397 #endif // SINGLE_THREAD
 398
 399 static CAResult_t CAProcessMulticastData(const CAData_t *data)
 400 {
 401     VERIFY_NON_NULL(data, TAG, "data");
 402     VERIFY_NON_NULL(data->remoteEndpoint, TAG, "remoteEndpoint");
 403
 404     coap_pdu_t *pdu = NULL;
 405     CAInfo_t *info = NULL;
 406     coap_list_t *options = NULL;
 407     coap_transport_type transport = coap_udp;
 408     CAResult_t res = CA_SEND_FAILED;
 409
 410     if (!data->requestInfo && !data->responseInfo)
 411     {
 412         OIC_LOG(ERROR, TAG, "request or response info is empty");
 413         return res;
 414     }
 415
 416     if (data->requestInfo)
 417     {
 418         OIC_LOG(DEBUG, TAG, "requestInfo is available..");
 419
 420         info = &data->requestInfo->info;
 421         pdu = CAGeneratePDU(CA_GET, info, data->remoteEndpoint, &options, &transport);
 422     }
 423     else if (data->responseInfo)
 424     {
 425         OIC_LOG(DEBUG, TAG, "responseInfo is available..");
 426
 427         info = &data->responseInfo->info;
 428         pdu = CAGeneratePDU(data->responseInfo->result, info, data->remoteEndpoint,
 429                             &options, &transport);
 430     }
 431
 432     if (!pdu)
 433     {
 434         OIC_LOG(ERROR,TAG,"Failed to generate multicast PDU");
 435         CASendErrorInfo(data->remoteEndpoint, info, CA_SEND_FAILED);
 436         coap_delete_list(options);
 437         return res;
 438     }
 439
 440 #ifdef WITH_BWT
 441     if (CAIsSupportedBlockwiseTransfer(data->remoteEndpoint->adapter))
 442     {
 443         // Blockwise transfer
 444         res = CAAddBlockOption(&pdu, info, data->remoteEndpoint, &options);
 445         if (CA_STATUS_OK != res)
 446         {
 447             OIC_LOG(DEBUG, TAG, "CAAddBlockOption has failed");
 448             goto exit;
 449         }
 450     }
 451 #endif // WITH_BWT
 452
 453     CALogPDUInfo(pdu, data->remoteEndpoint);
 454
 455     OIC_LOG(DEBUG, TAG, "pdu to send :");
 456     OIC_LOG_BUFFER(DEBUG, TAG,  (uint8_t*)pdu->hdr, pdu->length);
 457
 458     res = CASendMulticastData(data->remoteEndpoint, pdu->hdr, pdu->length);
 459     if (CA_STATUS_OK != res)
 460     {
 461         OIC_LOG_V(ERROR, TAG, "send failed:%d", res);
 462         goto exit;
 463     }
 464
 465     coap_delete_list(options);
 466     coap_delete_pdu(pdu);
 467     return res;
 468
 469 exit:
 470     CAErrorHandler(data->remoteEndpoint, pdu->hdr, pdu->length, res);
 471     coap_delete_list(options);
 472     coap_delete_pdu(pdu);
 473     return res;
 474 }
 475
 476 static CAResult_t CAProcessSendData(const CAData_t *data)
 477 {
 478     VERIFY_NON_NULL(data, TAG, "data");
 479     VERIFY_NON_NULL(data->remoteEndpoint, TAG, "remoteEndpoint");
 480
 481     CAResult_t res = CA_STATUS_FAILED;
 482
 483     CASendDataType_t type = data->type;
 484
 485     coap_pdu_t *pdu = NULL;
 486     CAInfo_t *info = NULL;
 487     coap_list_t *options = NULL;
 488     coap_transport_type transport = coap_udp;
 489
 490     if (SEND_TYPE_UNICAST == type)
 491     {
 492         OIC_LOG(DEBUG,TAG,"Unicast message");
 493
 494 #ifdef ROUTING_GATEWAY
 495         /*
 496          * When forwarding a packet, do not attempt retransmission as its the responsibility of
 497          * packet originator node
 498          */
 499         bool skipRetransmission = false;
 500 #endif
 501
 502         if (NULL != data->requestInfo)
 503         {
 504             OIC_LOG(DEBUG, TAG, "requestInfo is available..");
 505
 506             info = &data->requestInfo->info;
 507 #ifdef ROUTING_GATEWAY
 508             skipRetransmission = data->requestInfo->info.skipRetransmission;
 509 #endif
 510             pdu = CAGeneratePDU(data->requestInfo->method, info, data->remoteEndpoint,
 511                                 &options, &transport);
 512         }
 513         else if (NULL != data->responseInfo)
 514         {
 515             OIC_LOG(DEBUG, TAG, "responseInfo is available..");
 516
 517             info = &data->responseInfo->info;
 518 #ifdef ROUTING_GATEWAY
 519             skipRetransmission = data->responseInfo->info.skipRetransmission;
 520 #endif
 521             pdu = CAGeneratePDU(data->responseInfo->result, info, data->remoteEndpoint,
 522                                 &options, &transport);
 523         }
 524         else
 525         {
 526             OIC_LOG(DEBUG, TAG, "request info, response info is empty");
 527             return CA_STATUS_INVALID_PARAM;
 528         }
 529
 530         // interface controller function call.
 531         if (NULL != pdu)
 532         {
 533 #ifdef WITH_BWT
 534             if (CAIsSupportedBlockwiseTransfer(data->remoteEndpoint->adapter))
 535             {
 536                 // Blockwise transfer
 537                 if (NULL != info)
 538                 {
 539                     CAResult_t res = CAAddBlockOption(&pdu, info,
 540                                                       data->remoteEndpoint,
 541                                                       &options);
 542                     if (CA_STATUS_OK != res)
 543                     {
 544                         OIC_LOG(INFO, TAG, "to write block option has failed");
 545                         CAErrorHandler(data->remoteEndpoint, pdu->hdr, pdu->length, res);
 546                         coap_delete_list(options);
 547                         coap_delete_pdu(pdu);
 548                         return res;
 549                     }
 550                 }
 551             }
 552 #endif // WITH_BWT
 553             CALogPDUInfo(pdu, data->remoteEndpoint);
 554
 555             res = CASendUnicastData(data->remoteEndpoint, pdu->hdr, pdu->length);
 556             if (CA_STATUS_OK != res)
 557             {
 558                 OIC_LOG_V(ERROR, TAG, "send failed:%d", res);
 559                 CAErrorHandler(data->remoteEndpoint, pdu->hdr, pdu->length, res);
 560                 coap_delete_list(options);
 561                 coap_delete_pdu(pdu);
 562                 return res;
 563             }
 564
 565 #ifdef WITH_TCP
 566             if (CAIsSupportedCoAPOverTCP(data->remoteEndpoint->adapter))
 567             {
 568                 OIC_LOG(INFO, TAG, "retransmission will be not worked");
 569             }
 570             else
 571 #endif
 572 #ifdef ROUTING_GATEWAY
 573             if(!skipRetransmission)
 574 #endif
 575             {
 576                 // for retransmission
 577                 res = CARetransmissionSentData(&g_retransmissionContext, data->remoteEndpoint,
 578                                                pdu->hdr, pdu->length);
 579                 if ((CA_STATUS_OK != res) && (CA_NOT_SUPPORTED != res))
 580                 {
 581                     //when retransmission not supported this will return CA_NOT_SUPPORTED, ignore
 582                     OIC_LOG_V(INFO, TAG, "retransmission is not enabled due to error, res : %d", res);
 583                     coap_delete_list(options);
 584                     coap_delete_pdu(pdu);
 585                     return res;
 586                 }
 587             }
 588
 589             coap_delete_list(options);
 590             coap_delete_pdu(pdu);
 591         }
 592         else
 593         {
 594             OIC_LOG(ERROR,TAG,"Failed to generate unicast PDU");
 595             CASendErrorInfo(data->remoteEndpoint, info, CA_SEND_FAILED);
 596             return CA_SEND_FAILED;
 597         }
 598     }
 599     else if (SEND_TYPE_MULTICAST == type)
 600     {
 601         OIC_LOG(DEBUG,TAG,"Multicast message");
 602 #ifdef WITH_TCP
 603         /*
 604          * If CoAP over TCP is enabled, the CoAP pdu wont be same for IP and other adapters.
 605          * That's why we need to generate two pdu's, one for IP and second for other transports.
 606          * Two possible cases we might have to split: a) when adapter is CA_DEFAULT_ADAPTER
 607          * b) when one of the adapter is IP adapter(ex: CA_ADAPTER_IP | CA_ADAPTER_GATT_BTLE)
 608          */
 609         if (data->remoteEndpoint->adapter == CA_DEFAULT_ADAPTER ||
 610                 (CA_ADAPTER_IP & data->remoteEndpoint->adapter &&
 611                     CA_ADAPTER_IP != data->remoteEndpoint->adapter))
 612         {
 613             if (data->remoteEndpoint->adapter == CA_DEFAULT_ADAPTER)
 614             {
 615                 data->remoteEndpoint->adapter = CA_ALL_ADAPTERS ^ CA_ADAPTER_IP;
 616             }
 617             else
 618             {
 619                 data->remoteEndpoint->adapter = data->remoteEndpoint->adapter ^ CA_ADAPTER_IP;
 620             }
 621             CAProcessMulticastData(data);
 622             data->remoteEndpoint->adapter = CA_ADAPTER_IP;
 623             CAProcessMulticastData(data);
 624         }
 625         else
 626         {
 627             CAProcessMulticastData(data);
 628         }
 629 #else
 630         CAProcessMulticastData(data);
 631 #endif
 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 #endif
 644
 645 /*
 646  * If a second message arrives with the same message ID, token and the other address
 647  * family, drop it.  Typically, IPv6 beats IPv4, so the IPv4 message is dropped.
 648  */
 649 static bool CADropSecondMessage(CAHistory_t *history, const CAEndpoint_t *ep, uint16_t id,
 650                                 CAToken_t token, uint8_t tokenLength)
 651 {
 652     if (!ep)
 653     {
 654         return true;
 655     }
 656     if (ep->adapter != CA_ADAPTER_IP)
 657     {
 658         return false;
 659     }
 660     if (!caglobals.ip.dualstack)
 661     {
 662         return false;
 663     }
 664
 665     if (tokenLength > CA_MAX_TOKEN_LEN)
 666     {
 667         /*
 668          * If token length is more than CA_MAX_TOKEN_LEN,
 669          * we compare the first CA_MAX_TOKEN_LEN bytes only.
 670          */
 671         tokenLength = CA_MAX_TOKEN_LEN;
 672     }
 673
 674     bool ret = false;
 675     CATransportFlags_t familyFlags = ep->flags & CA_IPFAMILY_MASK;
 676
 677     for (size_t i = 0; i < sizeof(history->items) / sizeof(history->items[0]); i++)
 678     {
 679         CAHistoryItem_t *item = &(history->items[i]);
 680         if (id == item->messageId && tokenLength == item->tokenLength
 681             && memcmp(item->token, token, tokenLength) == 0)
 682         {
 683             if ((familyFlags ^ item->flags) == CA_IPFAMILY_MASK)
 684             {
 685                 OIC_LOG_V(INFO, TAG, "IPv%c duplicate message ignored",
 686                           familyFlags & CA_IPV6 ? '6' : '4');
 687                 ret = true;
 688                 break;
 689             }
 690         }
 691     }
 692
 693     history->items[history->nextIndex].flags = familyFlags;
 694     history->items[history->nextIndex].messageId = id;
 695     if (token && tokenLength)
 696     {
 697         memcpy(history->items[history->nextIndex].token, token, tokenLength);
 698         history->items[history->nextIndex].tokenLength = tokenLength;
 699     }
 700
 701     if (++history->nextIndex >= HISTORYSIZE)
 702     {
 703         history->nextIndex = 0;
 704     }
 705
 706     return ret;
 707 }
 708
 709 static void CAReceivedPacketCallback(const CASecureEndpoint_t *sep,
 710                                      const void *data, uint32_t dataLen)
 711 {
 712     VERIFY_NON_NULL_VOID(sep, TAG, "remoteEndpoint");
 713     VERIFY_NON_NULL_VOID(data, TAG, "data");
 714
 715     OIC_LOG(DEBUG, TAG, "received pdu data :");
 716     OIC_LOG_BUFFER(DEBUG, TAG,  data, dataLen);
 717
 718     uint32_t code = CA_NOT_FOUND;
 719     CAData_t *cadata = NULL;
 720
 721     coap_pdu_t *pdu = (coap_pdu_t *) CAParsePDU((const char *) data, dataLen, &code,
 722                                                 &(sep->endpoint));
 723     if (NULL == pdu)
 724     {
 725         OIC_LOG(ERROR, TAG, "Parse PDU failed");
 726         return;
 727     }
 728
 729     OIC_LOG_V(DEBUG, TAG, "code = %d", code);
 730     if (CA_GET == code || CA_POST == code || CA_PUT == code || CA_DELETE == code)
 731     {
 732         cadata = CAGenerateHandlerData(&(sep->endpoint), &(sep->identity), pdu, CA_REQUEST_DATA);
 733         if (!cadata)
 734         {
 735             OIC_LOG(ERROR, TAG, "CAReceivedPacketCallback, CAGenerateHandlerData failed!");
 736             coap_delete_pdu(pdu);
 737             return;
 738         }
 739     }
 740     else
 741     {
 742         cadata = CAGenerateHandlerData(&(sep->endpoint), &(sep->identity), pdu, CA_RESPONSE_DATA);
 743         if (!cadata)
 744         {
 745             OIC_LOG(ERROR, TAG, "CAReceivedPacketCallback, CAGenerateHandlerData failed!");
 746             coap_delete_pdu(pdu);
 747             return;
 748         }
 749
 750 #ifdef WITH_TCP
 751         if (CAIsSupportedCoAPOverTCP(sep->endpoint.adapter))
 752         {
 753             OIC_LOG(INFO, TAG, "retransmission is not supported");
 754         }
 755         else
 756 #endif
 757         {
 758             // for retransmission
 759             void *retransmissionPdu = NULL;
 760             CARetransmissionReceivedData(&g_retransmissionContext, cadata->remoteEndpoint, pdu->hdr,
 761                                          pdu->length, &retransmissionPdu);
 762
 763             // get token from saved data in retransmission list
 764             if (retransmissionPdu && CA_EMPTY == code)
 765             {
 766                 if (cadata->responseInfo)
 767                 {
 768                     CAInfo_t *info = &cadata->responseInfo->info;
 769                     CAResult_t res = CAGetTokenFromPDU((const coap_hdr_t *)retransmissionPdu,
 770                                                        info, &(sep->endpoint));
 771                     if (CA_STATUS_OK != res)
 772                     {
 773                         OIC_LOG(ERROR, TAG, "fail to get Token from retransmission list");
 774                         OICFree(info->token);
 775                         info->tokenLength = 0;
 776                     }
 777                 }
 778             }
 779             OICFree(retransmissionPdu);
 780         }
 781     }
 782
 783     cadata->type = SEND_TYPE_UNICAST;
 784
 785 #ifdef SINGLE_THREAD
 786     CAProcessReceivedData(cadata);
 787 #else
 788 #ifdef WITH_BWT
 789     if (CAIsSupportedBlockwiseTransfer(sep->endpoint.adapter))
 790     {
 791         CAResult_t res = CAReceiveBlockWiseData(pdu, &(sep->endpoint), cadata, dataLen);
 792         if (CA_NOT_SUPPORTED == res || CA_REQUEST_TIMEOUT == res)
 793         {
 794             OIC_LOG(DEBUG, TAG, "this message does not have block option");
 795             CAQueueingThreadAddData(&g_receiveThread, cadata, sizeof(CAData_t));
 796         }
 797         else
 798         {
 799             CADestroyData(cadata, sizeof(CAData_t));
 800         }
 801     }
 802     else
 803 #endif
 804     {
 805         CAQueueingThreadAddData(&g_receiveThread, cadata, sizeof(CAData_t));
 806     }
 807 #endif // SINGLE_THREAD
 808
 809     coap_delete_pdu(pdu);
 810 }
 811
 812 void CAHandleRequestResponseCallbacks()
 813 {
 814 #ifdef SINGLE_THREAD
 815     CAReadData();
 816     CARetransmissionBaseRoutine((void *)&g_retransmissionContext);
 817 #else
 818 #ifdef SINGLE_HANDLE
 819     // parse the data and call the callbacks.
 820     // #1 parse the data
 821     // #2 get endpoint
 822
 823     ca_mutex_lock(g_receiveThread.threadMutex);
 824
 825     u_queue_message_t *item = u_queue_get_element(g_receiveThread.dataQueue);
 826
 827     ca_mutex_unlock(g_receiveThread.threadMutex);
 828
 829     if (NULL == item || NULL == item->msg)
 830     {
 831         return;
 832     }
 833
 834     // get endpoint
 835     CAData_t *td = (CAData_t *) item->msg;
 836
 837     if (td->requestInfo && g_requestHandler)
 838     {
 839         OIC_LOG_V(DEBUG, TAG, "request callback : %d", td->requestInfo->info.numOptions);
 840         g_requestHandler(td->remoteEndpoint, td->requestInfo);
 841     }
 842     else if (td->responseInfo && g_responseHandler)
 843     {
 844         OIC_LOG_V(DEBUG, TAG, "response callback : %d", td->responseInfo->info.numOptions);
 845         g_responseHandler(td->remoteEndpoint, td->responseInfo);
 846     }
 847     else if (td->errorInfo && g_errorHandler)
 848     {
 849         OIC_LOG_V(DEBUG, TAG, "error callback error: %d", td->errorInfo->result);
 850         g_errorHandler(td->remoteEndpoint, td->errorInfo);
 851     }
 852
 853     CADestroyData(item->msg, sizeof(CAData_t));
 854     OICFree(item);
 855
 856 #endif // SINGLE_HANDLE
 857 #endif // SINGLE_THREAD
 858 }
 859
 860 static CAData_t* CAPrepareSendData(const CAEndpoint_t *endpoint, const void *sendData,
 861                                    CADataType_t dataType)
 862 {
 863     OIC_LOG(DEBUG, TAG, "CAPrepareSendData IN");
 864
 865     CAData_t *cadata = (CAData_t *) OICCalloc(1, sizeof(CAData_t));
 866     if (!cadata)
 867     {
 868         OIC_LOG(ERROR, TAG, "memory allocation failed");
 869         return NULL;
 870     }
 871
 872     if (CA_REQUEST_DATA == dataType)
 873     {
 874         // clone request info
 875         CARequestInfo_t *request = CACloneRequestInfo((CARequestInfo_t *)sendData);
 876
 877         if (!request)
 878         {
 879             OIC_LOG(ERROR, TAG, "CACloneRequestInfo failed");
 880             goto exit;
 881         }
 882
 883         cadata->type = request->isMulticast ? SEND_TYPE_MULTICAST : SEND_TYPE_UNICAST;
 884         cadata->requestInfo =  request;
 885     }
 886     else if (CA_RESPONSE_DATA == dataType)
 887     {
 888         // clone response info
 889         CAResponseInfo_t *response = CACloneResponseInfo((CAResponseInfo_t *)sendData);
 890
 891         if(!response)
 892         {
 893             OIC_LOG(ERROR, TAG, "CACloneResponseInfo failed");
 894             goto exit;
 895         }
 896
 897         cadata->type = response->isMulticast ? SEND_TYPE_MULTICAST : SEND_TYPE_UNICAST;
 898         cadata->responseInfo = response;
 899     }
 900     else
 901     {
 902         OIC_LOG(ERROR, TAG, "CAPrepareSendData unknown data type");
 903         goto exit;
 904     }
 905
 906     CAEndpoint_t* ep = CACloneEndpoint(endpoint);
 907     if (!ep)
 908     {
 909         OIC_LOG(ERROR, TAG, "endpoint clone failed");
 910         goto exit;
 911     }
 912
 913     cadata->remoteEndpoint = ep;
 914     cadata->dataType = dataType;
 915     return cadata;
 916
 917 exit:
 918     CADestroyData(cadata, sizeof(CAData_t));
 919     return NULL;
 920 }
 921
 922 CAResult_t CADetachSendMessage(const CAEndpoint_t *endpoint, const void *sendMsg,
 923                                CADataType_t dataType)
 924 {
 925     VERIFY_NON_NULL(endpoint, TAG, "endpoint");
 926     VERIFY_NON_NULL(sendMsg, TAG, "sendMsg");
 927
 928     if (false == CAIsSelectedNetworkAvailable())
 929     {
 930         return CA_STATUS_FAILED;
 931     }
 932
 933 #ifdef ARDUINO
 934     // If max retransmission queue is reached, then don't handle new request
 935     if (CA_MAX_RT_ARRAY_SIZE == u_arraylist_length(g_retransmissionContext.dataList))
 936     {
 937         OIC_LOG(ERROR, TAG, "max RT queue size reached!");
 938         return CA_SEND_FAILED;
 939     }
 940 #endif // ARDUINO
 941
 942     CAData_t *data = CAPrepareSendData(endpoint, sendMsg, dataType);
 943     if(!data)
 944     {
 945         OIC_LOG(ERROR, TAG, "CAPrepareSendData failed");
 946         return CA_MEMORY_ALLOC_FAILED;
 947     }
 948
 949 #ifdef SINGLE_THREAD
 950     CAResult_t result = CAProcessSendData(data);
 951     if (CA_STATUS_OK != result)
 952     {
 953         OIC_LOG(ERROR, TAG, "CAProcessSendData failed");
 954         CADestroyData(data, sizeof(CAData_t));
 955         return result;
 956     }
 957
 958     CADestroyData(data, sizeof(CAData_t));
 959 #else
 960 #ifdef WITH_BWT
 961     if (CAIsSupportedBlockwiseTransfer(endpoint->adapter))
 962     {
 963         // send block data
 964         CAResult_t res = CASendBlockWiseData(data);
 965         if (CA_NOT_SUPPORTED == res)
 966         {
 967             OIC_LOG(DEBUG, TAG, "normal msg will be sent");
 968             CAQueueingThreadAddData(&g_sendThread, data, sizeof(CAData_t));
 969             return CA_STATUS_OK;
 970         }
 971         else
 972         {
 973             CADestroyData(data, sizeof(CAData_t));
 974         }
 975         return res;
 976     }
 977     else
 978 #endif // WITH_BWT
 979     {
 980         CAQueueingThreadAddData(&g_sendThread, data, sizeof(CAData_t));
 981     }
 982 #endif // SINGLE_THREAD
 983
 984     return CA_STATUS_OK;
 985 }
 986
 987 void CASetInterfaceCallbacks(CARequestCallback ReqHandler, CAResponseCallback RespHandler,
 988                              CAErrorCallback errorHandler)
 989 {
 990     g_requestHandler = ReqHandler;
 991     g_responseHandler = RespHandler;
 992     g_errorHandler = errorHandler;
 993 }
 994
 995 void CASetNetworkMonitorCallback(CANetworkMonitorCallback nwMonitorHandler)
 996 {
 997     g_nwMonitorHandler = nwMonitorHandler;
 998 }
 999
1000 CAResult_t CAInitializeMessageHandler()
1001 {
1002     CASetPacketReceivedCallback(CAReceivedPacketCallback);
1003     CASetErrorHandleCallback(CAErrorHandler);
1004
1005 #ifndef SINGLE_THREAD
1006     // create thread pool
1007     CAResult_t res = ca_thread_pool_init(MAX_THREAD_POOL_SIZE, &g_threadPoolHandle);
1008     if (CA_STATUS_OK != res)
1009     {
1010         OIC_LOG(ERROR, TAG, "thread pool initialize error.");
1011         return res;
1012     }
1013
1014     // send thread initialize
1015     res = CAQueueingThreadInitialize(&g_sendThread, g_threadPoolHandle,
1016                                      CASendThreadProcess, CADestroyData);
1017     if (CA_STATUS_OK != res)
1018     {
1019         OIC_LOG(ERROR, TAG, "Failed to Initialize send queue thread");
1020         ca_thread_pool_free(g_threadPoolHandle);
1021         g_threadPoolHandle = NULL;
1022         return res;
1023     }
1024
1025     // start send thread
1026     res = CAQueueingThreadStart(&g_sendThread);
1027     if (CA_STATUS_OK != res)
1028     {
1029         OIC_LOG(ERROR, TAG, "thread start error(send thread).");
1030         ca_thread_pool_free(g_threadPoolHandle);
1031         g_threadPoolHandle = NULL;
1032         CAQueueingThreadDestroy(&g_sendThread);
1033         return res;
1034     }
1035
1036     // receive thread initialize
1037     res = CAQueueingThreadInitialize(&g_receiveThread, g_threadPoolHandle,
1038                                      CAReceiveThreadProcess, CADestroyData);
1039     if (CA_STATUS_OK != res)
1040     {
1041         OIC_LOG(ERROR, TAG, "Failed to Initialize receive queue thread");
1042         ca_thread_pool_free(g_threadPoolHandle);
1043         g_threadPoolHandle = NULL;
1044         CAQueueingThreadDestroy(&g_sendThread);
1045         return res;
1046     }
1047
1048 #ifndef SINGLE_HANDLE // This will be enabled when RI supports multi threading
1049     // start receive thread
1050     res = CAQueueingThreadStart(&g_receiveThread);
1051     if (CA_STATUS_OK != res)
1052     {
1053         OIC_LOG(ERROR, TAG, "thread start error(receive thread).");
1054         ca_thread_pool_free(g_threadPoolHandle);
1055         g_threadPoolHandle = NULL;
1056         CAQueueingThreadDestroy(&g_sendThread);
1057         CAQueueingThreadDestroy(&g_receiveThread);
1058         return res;
1059     }
1060 #endif // SINGLE_HANDLE
1061
1062     // retransmission initialize
1063     res = CARetransmissionInitialize(&g_retransmissionContext, g_threadPoolHandle,
1064                                      CASendUnicastData, CATimeoutCallback, NULL);
1065     if (CA_STATUS_OK != res)
1066     {
1067         OIC_LOG(ERROR, TAG, "Failed to Initialize Retransmission.");
1068         ca_thread_pool_free(g_threadPoolHandle);
1069         g_threadPoolHandle = NULL;
1070         CAQueueingThreadDestroy(&g_sendThread);
1071         CAQueueingThreadDestroy(&g_receiveThread);
1072         return res;
1073     }
1074
1075 #ifdef WITH_BWT
1076     // block-wise transfer initialize
1077     res = CAInitializeBlockWiseTransfer(CAAddDataToSendThread, CAAddDataToReceiveThread);
1078     if (CA_STATUS_OK != res)
1079     {
1080         OIC_LOG(ERROR, TAG, "Failed to Initialize BlockWiseTransfer.");
1081         ca_thread_pool_free(g_threadPoolHandle);
1082         g_threadPoolHandle = NULL;
1083         CAQueueingThreadDestroy(&g_sendThread);
1084         CAQueueingThreadDestroy(&g_receiveThread);
1085         CARetransmissionDestroy(&g_retransmissionContext);
1086         return res;
1087     }
1088 #endif
1089
1090     // start retransmission
1091     res = CARetransmissionStart(&g_retransmissionContext);
1092     if (CA_STATUS_OK != res)
1093     {
1094         OIC_LOG(ERROR, TAG, "thread start error(retransmission thread).");
1095         ca_thread_pool_free(g_threadPoolHandle);
1096         g_threadPoolHandle = NULL;
1097         CAQueueingThreadDestroy(&g_sendThread);
1098         CAQueueingThreadDestroy(&g_receiveThread);
1099         CARetransmissionDestroy(&g_retransmissionContext);
1100         return res;
1101     }
1102
1103     // initialize interface adapters by controller
1104     CAInitializeAdapters(g_threadPoolHandle);
1105 #else
1106     // retransmission initialize
1107     CAResult_t res = CARetransmissionInitialize(&g_retransmissionContext, NULL, CASendUnicastData,
1108                                                 CATimeoutCallback, NULL);
1109     if (CA_STATUS_OK != res)
1110     {
1111         OIC_LOG(ERROR, TAG, "Failed to Initialize Retransmission.");
1112         return res;
1113     }
1114
1115     CAInitializeAdapters();
1116 #endif // SINGLE_THREAD
1117
1118     return CA_STATUS_OK;
1119 }
1120
1121 void CATerminateMessageHandler()
1122 {
1123 #ifndef SINGLE_THREAD
1124     CATransportAdapter_t connType;
1125     u_arraylist_t *list = CAGetSelectedNetworkList();
1126     uint32_t length = u_arraylist_length(list);
1127
1128     uint32_t i = 0;
1129     for (i = 0; i < length; i++)
1130     {
1131         void* ptrType = u_arraylist_get(list, i);
1132
1133         if (NULL == ptrType)
1134         {
1135             continue;
1136         }
1137
1138         connType = *(CATransportAdapter_t *)ptrType;
1139         CAStopAdapter(connType);
1140     }
1141
1142     // stop retransmission
1143     if (NULL != g_retransmissionContext.threadMutex)
1144     {
1145         CARetransmissionStop(&g_retransmissionContext);
1146     }
1147
1148     // stop thread
1149     // delete thread data
1150     if (NULL != g_sendThread.threadMutex)
1151     {
1152         CAQueueingThreadStop(&g_sendThread);
1153     }
1154
1155     // stop thread
1156     // delete thread data
1157     if (NULL != g_receiveThread.threadMutex)
1158     {
1159 #ifndef SINGLE_HANDLE // This will be enabled when RI supports multi threading
1160         CAQueueingThreadStop(&g_receiveThread);
1161 #endif
1162     }
1163
1164     // destroy thread pool
1165     if (NULL != g_threadPoolHandle)
1166     {
1167         ca_thread_pool_free(g_threadPoolHandle);
1168         g_threadPoolHandle = NULL;
1169     }
1170
1171 #ifdef WITH_BWT
1172     CATerminateBlockWiseTransfer();
1173 #endif
1174     CARetransmissionDestroy(&g_retransmissionContext);
1175     CAQueueingThreadDestroy(&g_sendThread);
1176     CAQueueingThreadDestroy(&g_receiveThread);
1177
1178     // terminate interface adapters by controller
1179     CATerminateAdapters();
1180 #else
1181     // terminate interface adapters by controller
1182     CATerminateAdapters();
1183
1184     // stop retransmission
1185     CARetransmissionStop(&g_retransmissionContext);
1186     CARetransmissionDestroy(&g_retransmissionContext);
1187 #endif // SINGLE_THREAD
1188 }
1189
1190 void CALogPDUInfo(coap_pdu_t *pdu, const CAEndpoint_t *endpoint)
1191 {
1192     VERIFY_NON_NULL_VOID(pdu, TAG, "pdu");
1193     VERIFY_NON_NULL_VOID(endpoint, TAG, "endpoint");
1194
1195     OIC_LOG_V(DEBUG, TAG, "PDU Maker - payload : %s", pdu->data);
1196
1197 #ifdef WITH_TCP
1198     if (CAIsSupportedCoAPOverTCP(endpoint->adapter))
1199     {
1200         OIC_LOG(DEBUG, TAG, "pdu header data :");
1201         OIC_LOG_BUFFER(DEBUG, TAG,  (const uint8_t *) pdu->hdr, pdu->length);
1202     }
1203     else
1204 #endif
1205     {
1206         OIC_LOG_V(DEBUG, TAG, "PDU Maker - type : %d", pdu->hdr->coap_hdr_udp_t.type);
1207
1208         OIC_LOG_V(DEBUG, TAG, "PDU Maker - code : %d", pdu->hdr->coap_hdr_udp_t.code);
1209
1210         OIC_LOG(DEBUG, TAG, "PDU Maker - token :");
1211
1212         OIC_LOG_BUFFER(DEBUG, TAG, pdu->hdr->coap_hdr_udp_t.token,
1213                        pdu->hdr->coap_hdr_udp_t.token_length);
1214     }
1215 }
1216
1217 static void CALogPayloadInfo(CAInfo_t *info)
1218 {
1219     if (info)
1220     {
1221         if (info->options)
1222         {
1223             for (uint32_t i = 0; i < info->numOptions; i++)
1224             {
1225                 OIC_LOG_V(DEBUG, TAG, "optionID: %u", info->options[i].optionID);
1226
1227                 OIC_LOG_V(DEBUG, TAG, "list: %s", info->options[i].optionData);
1228             }
1229         }
1230
1231         if (info->payload)
1232         {
1233             OIC_LOG_V(DEBUG, TAG, "payload: %p(%zu)", info->payload,
1234                       info->payloadSize);
1235         }
1236
1237         if (info->token)
1238         {
1239             OIC_LOG(DEBUG, TAG, "token:");
1240             OIC_LOG_BUFFER(DEBUG, TAG, (const uint8_t *) info->token,
1241                            info->tokenLength);
1242         }
1243         OIC_LOG_V(DEBUG, TAG, "msgID: %u", info->messageId);
1244     }
1245     else
1246     {
1247         OIC_LOG(DEBUG, TAG, "info is NULL, cannot output log data");
1248     }
1249 }
1250
1251 void CAErrorHandler(const CAEndpoint_t *endpoint,
1252                     const void *data, uint32_t dataLen,
1253                     CAResult_t result)
1254 {
1255     OIC_LOG(DEBUG, TAG, "CAErrorHandler IN");
1256
1257 #ifndef SINGLE_THREAD
1258     VERIFY_NON_NULL_VOID(endpoint, TAG, "remoteEndpoint");
1259     VERIFY_NON_NULL_VOID(data, TAG, "data");
1260
1261     uint32_t code = CA_NOT_FOUND;
1262     //Do not free remoteEndpoint and data. Currently they will be freed in data thread
1263     //Get PDU data
1264     coap_pdu_t *pdu = (coap_pdu_t *)CAParsePDU((const char *)data, dataLen, &code, endpoint);
1265     if (NULL == pdu)
1266     {
1267         OIC_LOG(ERROR, TAG, "Parse PDU failed");
1268         return;
1269     }
1270
1271     CAData_t *cadata = CAGenerateHandlerData(endpoint, NULL, pdu, CA_ERROR_DATA);
1272     if (!cadata)
1273     {
1274         OIC_LOG(ERROR, TAG, "CAErrorHandler, CAGenerateHandlerData failed!");
1275         coap_delete_pdu(pdu);
1276         return;
1277     }
1278
1279     cadata->errorInfo->result = result;
1280
1281     CAQueueingThreadAddData(&g_receiveThread, cadata, sizeof(CAData_t));
1282     coap_delete_pdu(pdu);
1283 #endif
1284
1285     OIC_LOG(DEBUG, TAG, "CAErrorHandler OUT");
1286     return;
1287 }
1288
1289 static void CASendErrorInfo(const CAEndpoint_t *endpoint, const CAInfo_t *info, CAResult_t result)
1290 {
1291     OIC_LOG(DEBUG, TAG, "CASendErrorInfo IN");
1292 #ifndef SINGLE_THREAD
1293     CAData_t *cadata = (CAData_t *) OICCalloc(1, sizeof(CAData_t));
1294     if (!cadata)
1295     {
1296         OIC_LOG(ERROR, TAG, "cadata memory allocation failed");
1297         return;
1298     }
1299
1300     CAEndpoint_t* ep = CACloneEndpoint(endpoint);
1301     if (!ep)
1302     {
1303         OIC_LOG(ERROR, TAG, "endpoint clone failed");
1304         OICFree(cadata);
1305         return;
1306     }
1307
1308     CAErrorInfo_t *errorInfo = (CAErrorInfo_t *)OICCalloc(1, sizeof (CAErrorInfo_t));
1309     if (!errorInfo)
1310     {
1311         OIC_LOG(ERROR, TAG, "errorInfo memory allocation failed");
1312         OICFree(cadata);
1313         CAFreeEndpoint(ep);
1314         return;
1315     }
1316
1317     CAResult_t res = CACloneInfo(info, &errorInfo->info);
1318     if (CA_STATUS_OK != res)
1319     {
1320         OIC_LOG(ERROR, TAG, "info clone failed");
1321         OICFree(cadata);
1322         OICFree(errorInfo);
1323         CAFreeEndpoint(ep);
1324         return;
1325     }
1326
1327     errorInfo->result = result;
1328     cadata->remoteEndpoint = ep;
1329     cadata->errorInfo = errorInfo;
1330     cadata->dataType = CA_ERROR_DATA;
1331
1332     CAQueueingThreadAddData(&g_receiveThread, cadata, sizeof(CAData_t));
1333 #endif
1334     OIC_LOG(DEBUG, TAG, "CASendErrorInfo OUT");
1335 }