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, data->dataType);
 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             OIC_LOG_V(INFO, TAG, "CASendUnicastData type : %d", data->dataType);
 556             res = CASendUnicastData(data->remoteEndpoint, pdu->hdr, pdu->length, data->dataType);
 557             if (CA_STATUS_OK != res)
 558             {
 559                 OIC_LOG_V(ERROR, TAG, "send failed:%d", res);
 560                 CAErrorHandler(data->remoteEndpoint, pdu->hdr, pdu->length, res);
 561                 coap_delete_list(options);
 562                 coap_delete_pdu(pdu);
 563                 return res;
 564             }
 565
 566 #ifdef WITH_TCP
 567             if (CAIsSupportedCoAPOverTCP(data->remoteEndpoint->adapter))
 568             {
 569                 OIC_LOG(INFO, TAG, "retransmission will be not worked");
 570             }
 571             else
 572 #endif
 573 #ifdef ROUTING_GATEWAY
 574             if(!skipRetransmission)
 575 #endif
 576             {
 577                 // for retransmission
 578                 res = CARetransmissionSentData(&g_retransmissionContext,
 579                                                data->remoteEndpoint,
 580                                                data->dataType,
 581                                                pdu->hdr, pdu->length);
 582                 if ((CA_STATUS_OK != res) && (CA_NOT_SUPPORTED != res))
 583                 {
 584                     //when retransmission not supported this will return CA_NOT_SUPPORTED, ignore
 585                     OIC_LOG_V(INFO, TAG, "retransmission is not enabled due to error, res : %d", res);
 586                     coap_delete_list(options);
 587                     coap_delete_pdu(pdu);
 588                     return res;
 589                 }
 590             }
 591
 592             coap_delete_list(options);
 593             coap_delete_pdu(pdu);
 594         }
 595         else
 596         {
 597             OIC_LOG(ERROR,TAG,"Failed to generate unicast PDU");
 598             CASendErrorInfo(data->remoteEndpoint, info, CA_SEND_FAILED);
 599             return CA_SEND_FAILED;
 600         }
 601     }
 602     else if (SEND_TYPE_MULTICAST == type)
 603     {
 604         OIC_LOG(DEBUG,TAG,"Multicast message");
 605 #ifdef WITH_TCP
 606         /*
 607          * If CoAP over TCP is enabled, the CoAP pdu wont be same for IP and other adapters.
 608          * That's why we need to generate two pdu's, one for IP and second for other transports.
 609          * Two possible cases we might have to split: a) when adapter is CA_DEFAULT_ADAPTER
 610          * b) when one of the adapter is IP adapter(ex: CA_ADAPTER_IP | CA_ADAPTER_GATT_BTLE)
 611          */
 612         if (data->remoteEndpoint->adapter == CA_DEFAULT_ADAPTER ||
 613                 (CA_ADAPTER_IP & data->remoteEndpoint->adapter &&
 614                     CA_ADAPTER_IP != data->remoteEndpoint->adapter))
 615         {
 616             if (data->remoteEndpoint->adapter == CA_DEFAULT_ADAPTER)
 617             {
 618                 data->remoteEndpoint->adapter = CA_ALL_ADAPTERS ^ CA_ADAPTER_IP;
 619             }
 620             else
 621             {
 622                 data->remoteEndpoint->adapter = data->remoteEndpoint->adapter ^ CA_ADAPTER_IP;
 623             }
 624             CAProcessMulticastData(data);
 625             data->remoteEndpoint->adapter = CA_ADAPTER_IP;
 626             CAProcessMulticastData(data);
 627         }
 628         else
 629         {
 630             CAProcessMulticastData(data);
 631         }
 632 #else
 633         CAProcessMulticastData(data);
 634 #endif
 635     }
 636
 637     return CA_STATUS_OK;
 638 }
 639
 640 #ifndef SINGLE_THREAD
 641 static void CASendThreadProcess(void *threadData)
 642 {
 643     CAData_t *data = (CAData_t *) threadData;
 644     CAProcessSendData(data);
 645 }
 646 #endif
 647
 648 /*
 649  * If a second message arrives with the same message ID, token and the other address
 650  * family, drop it.  Typically, IPv6 beats IPv4, so the IPv4 message is dropped.
 651  */
 652 static bool CADropSecondMessage(CAHistory_t *history, const CAEndpoint_t *ep, uint16_t id,
 653                                 CAToken_t token, uint8_t tokenLength)
 654 {
 655     if (!ep)
 656     {
 657         return true;
 658     }
 659     if (ep->adapter != CA_ADAPTER_IP)
 660     {
 661         return false;
 662     }
 663     if (!caglobals.ip.dualstack)
 664     {
 665         return false;
 666     }
 667
 668     if (tokenLength > CA_MAX_TOKEN_LEN)
 669     {
 670         /*
 671          * If token length is more than CA_MAX_TOKEN_LEN,
 672          * we compare the first CA_MAX_TOKEN_LEN bytes only.
 673          */
 674         tokenLength = CA_MAX_TOKEN_LEN;
 675     }
 676
 677     bool ret = false;
 678     CATransportFlags_t familyFlags = ep->flags & CA_IPFAMILY_MASK;
 679
 680     for (size_t i = 0; i < sizeof(history->items) / sizeof(history->items[0]); i++)
 681     {
 682         CAHistoryItem_t *item = &(history->items[i]);
 683         if (id == item->messageId && tokenLength == item->tokenLength
 684             && memcmp(item->token, token, tokenLength) == 0)
 685         {
 686             if ((familyFlags ^ item->flags) == CA_IPFAMILY_MASK)
 687             {
 688                 OIC_LOG_V(INFO, TAG, "IPv%c duplicate message ignored",
 689                           familyFlags & CA_IPV6 ? '6' : '4');
 690                 ret = true;
 691                 break;
 692             }
 693         }
 694     }
 695
 696     history->items[history->nextIndex].flags = familyFlags;
 697     history->items[history->nextIndex].messageId = id;
 698     if (token && tokenLength)
 699     {
 700         memcpy(history->items[history->nextIndex].token, token, tokenLength);
 701         history->items[history->nextIndex].tokenLength = tokenLength;
 702     }
 703
 704     if (++history->nextIndex >= HISTORYSIZE)
 705     {
 706         history->nextIndex = 0;
 707     }
 708
 709     return ret;
 710 }
 711
 712 static void CAReceivedPacketCallback(const CASecureEndpoint_t *sep,
 713                                      const void *data, uint32_t dataLen)
 714 {
 715     VERIFY_NON_NULL_VOID(sep, TAG, "remoteEndpoint");
 716     VERIFY_NON_NULL_VOID(data, TAG, "data");
 717
 718     OIC_LOG(DEBUG, TAG, "received pdu data :");
 719     OIC_LOG_BUFFER(DEBUG, TAG,  data, dataLen);
 720
 721     uint32_t code = CA_NOT_FOUND;
 722     CAData_t *cadata = NULL;
 723
 724     coap_pdu_t *pdu = (coap_pdu_t *) CAParsePDU((const char *) data, dataLen, &code,
 725                                                 &(sep->endpoint));
 726     if (NULL == pdu)
 727     {
 728         OIC_LOG(ERROR, TAG, "Parse PDU failed");
 729         return;
 730     }
 731
 732     OIC_LOG_V(DEBUG, TAG, "code = %d", code);
 733     if (CA_GET == code || CA_POST == code || CA_PUT == code || CA_DELETE == code)
 734     {
 735         cadata = CAGenerateHandlerData(&(sep->endpoint), &(sep->identity), pdu, CA_REQUEST_DATA);
 736         if (!cadata)
 737         {
 738             OIC_LOG(ERROR, TAG, "CAReceivedPacketCallback, CAGenerateHandlerData failed!");
 739             coap_delete_pdu(pdu);
 740             return;
 741         }
 742     }
 743     else
 744     {
 745         cadata = CAGenerateHandlerData(&(sep->endpoint), &(sep->identity), pdu, CA_RESPONSE_DATA);
 746         if (!cadata)
 747         {
 748             OIC_LOG(ERROR, TAG, "CAReceivedPacketCallback, CAGenerateHandlerData failed!");
 749             coap_delete_pdu(pdu);
 750             return;
 751         }
 752
 753 #ifdef WITH_TCP
 754         if (CAIsSupportedCoAPOverTCP(sep->endpoint.adapter))
 755         {
 756             OIC_LOG(INFO, TAG, "retransmission is not supported");
 757         }
 758         else
 759 #endif
 760         {
 761             // for retransmission
 762             void *retransmissionPdu = NULL;
 763             CARetransmissionReceivedData(&g_retransmissionContext, cadata->remoteEndpoint, pdu->hdr,
 764                                          pdu->length, &retransmissionPdu);
 765
 766             // get token from saved data in retransmission list
 767             if (retransmissionPdu && CA_EMPTY == code)
 768             {
 769                 if (cadata->responseInfo)
 770                 {
 771                     CAInfo_t *info = &cadata->responseInfo->info;
 772                     CAResult_t res = CAGetTokenFromPDU((const coap_hdr_t *)retransmissionPdu,
 773                                                        info, &(sep->endpoint));
 774                     if (CA_STATUS_OK != res)
 775                     {
 776                         OIC_LOG(ERROR, TAG, "fail to get Token from retransmission list");
 777                         OICFree(info->token);
 778                         info->tokenLength = 0;
 779                     }
 780                 }
 781             }
 782             OICFree(retransmissionPdu);
 783         }
 784     }
 785
 786     cadata->type = SEND_TYPE_UNICAST;
 787
 788 #ifdef SINGLE_THREAD
 789     CAProcessReceivedData(cadata);
 790 #else
 791 #ifdef WITH_BWT
 792     if (CAIsSupportedBlockwiseTransfer(sep->endpoint.adapter))
 793     {
 794         CAResult_t res = CAReceiveBlockWiseData(pdu, &(sep->endpoint), cadata, dataLen);
 795         if (CA_NOT_SUPPORTED == res || CA_REQUEST_TIMEOUT == res)
 796         {
 797             OIC_LOG(DEBUG, TAG, "this message does not have block option");
 798             CAQueueingThreadAddData(&g_receiveThread, cadata, sizeof(CAData_t));
 799         }
 800         else
 801         {
 802             CADestroyData(cadata, sizeof(CAData_t));
 803         }
 804     }
 805     else
 806 #endif
 807     {
 808         CAQueueingThreadAddData(&g_receiveThread, cadata, sizeof(CAData_t));
 809     }
 810 #endif // SINGLE_THREAD
 811
 812     coap_delete_pdu(pdu);
 813 }
 814
 815 void CAHandleRequestResponseCallbacks()
 816 {
 817 #ifdef SINGLE_THREAD
 818     CAReadData();
 819     CARetransmissionBaseRoutine((void *)&g_retransmissionContext);
 820 #else
 821 #ifdef SINGLE_HANDLE
 822     // parse the data and call the callbacks.
 823     // #1 parse the data
 824     // #2 get endpoint
 825
 826     ca_mutex_lock(g_receiveThread.threadMutex);
 827
 828     u_queue_message_t *item = u_queue_get_element(g_receiveThread.dataQueue);
 829
 830     ca_mutex_unlock(g_receiveThread.threadMutex);
 831
 832     if (NULL == item || NULL == item->msg)
 833     {
 834         return;
 835     }
 836
 837     // get endpoint
 838     CAData_t *td = (CAData_t *) item->msg;
 839
 840     if (td->requestInfo && g_requestHandler)
 841     {
 842         OIC_LOG_V(DEBUG, TAG, "request callback : %d", td->requestInfo->info.numOptions);
 843         g_requestHandler(td->remoteEndpoint, td->requestInfo);
 844     }
 845     else if (td->responseInfo && g_responseHandler)
 846     {
 847         OIC_LOG_V(DEBUG, TAG, "response callback : %d", td->responseInfo->info.numOptions);
 848         g_responseHandler(td->remoteEndpoint, td->responseInfo);
 849     }
 850     else if (td->errorInfo && g_errorHandler)
 851     {
 852         OIC_LOG_V(DEBUG, TAG, "error callback error: %d", td->errorInfo->result);
 853         g_errorHandler(td->remoteEndpoint, td->errorInfo);
 854     }
 855
 856     CADestroyData(item->msg, sizeof(CAData_t));
 857     OICFree(item);
 858
 859 #endif // SINGLE_HANDLE
 860 #endif // SINGLE_THREAD
 861 }
 862
 863 static CAData_t* CAPrepareSendData(const CAEndpoint_t *endpoint, const void *sendData,
 864                                    CADataType_t dataType)
 865 {
 866     OIC_LOG(DEBUG, TAG, "CAPrepareSendData IN");
 867
 868     CAData_t *cadata = (CAData_t *) OICCalloc(1, sizeof(CAData_t));
 869     if (!cadata)
 870     {
 871         OIC_LOG(ERROR, TAG, "memory allocation failed");
 872         return NULL;
 873     }
 874
 875     if (CA_REQUEST_DATA == dataType)
 876     {
 877         // clone request info
 878         CARequestInfo_t *request = CACloneRequestInfo((CARequestInfo_t *)sendData);
 879
 880         if (!request)
 881         {
 882             OIC_LOG(ERROR, TAG, "CACloneRequestInfo failed");
 883             goto exit;
 884         }
 885
 886         cadata->type = request->isMulticast ? SEND_TYPE_MULTICAST : SEND_TYPE_UNICAST;
 887         cadata->requestInfo =  request;
 888     }
 889     else if (CA_RESPONSE_DATA == dataType || CA_RESPONSE_FOR_RES == dataType)
 890     {
 891         // clone response info
 892         CAResponseInfo_t *response = CACloneResponseInfo((CAResponseInfo_t *)sendData);
 893
 894         if(!response)
 895         {
 896             OIC_LOG(ERROR, TAG, "CACloneResponseInfo failed");
 897             goto exit;
 898         }
 899
 900         cadata->type = response->isMulticast ? SEND_TYPE_MULTICAST : SEND_TYPE_UNICAST;
 901         cadata->responseInfo = response;
 902     }
 903     else
 904     {
 905         OIC_LOG(ERROR, TAG, "CAPrepareSendData unknown data type");
 906         goto exit;
 907     }
 908
 909     CAEndpoint_t* ep = CACloneEndpoint(endpoint);
 910     if (!ep)
 911     {
 912         OIC_LOG(ERROR, TAG, "endpoint clone failed");
 913         goto exit;
 914     }
 915
 916     cadata->remoteEndpoint = ep;
 917     cadata->dataType = dataType;
 918     return cadata;
 919
 920 exit:
 921     CADestroyData(cadata, sizeof(CAData_t));
 922     return NULL;
 923 }
 924
 925 CAResult_t CADetachSendMessage(const CAEndpoint_t *endpoint, const void *sendMsg,
 926                                CADataType_t dataType)
 927 {
 928     VERIFY_NON_NULL(endpoint, TAG, "endpoint");
 929     VERIFY_NON_NULL(sendMsg, TAG, "sendMsg");
 930
 931     if (false == CAIsSelectedNetworkAvailable())
 932     {
 933         return CA_STATUS_FAILED;
 934     }
 935
 936 #ifdef ARDUINO
 937     // If max retransmission queue is reached, then don't handle new request
 938     if (CA_MAX_RT_ARRAY_SIZE == u_arraylist_length(g_retransmissionContext.dataList))
 939     {
 940         OIC_LOG(ERROR, TAG, "max RT queue size reached!");
 941         return CA_SEND_FAILED;
 942     }
 943 #endif // ARDUINO
 944
 945     CAData_t *data = CAPrepareSendData(endpoint, sendMsg, dataType);
 946     if(!data)
 947     {
 948         OIC_LOG(ERROR, TAG, "CAPrepareSendData failed");
 949         return CA_MEMORY_ALLOC_FAILED;
 950     }
 951
 952 #ifdef SINGLE_THREAD
 953     CAResult_t result = CAProcessSendData(data);
 954     if (CA_STATUS_OK != result)
 955     {
 956         OIC_LOG(ERROR, TAG, "CAProcessSendData failed");
 957         CADestroyData(data, sizeof(CAData_t));
 958         return result;
 959     }
 960
 961     CADestroyData(data, sizeof(CAData_t));
 962 #else
 963 #ifdef WITH_BWT
 964     if (CAIsSupportedBlockwiseTransfer(endpoint->adapter))
 965     {
 966         // send block data
 967         CAResult_t res = CASendBlockWiseData(data);
 968         if (CA_NOT_SUPPORTED == res)
 969         {
 970             OIC_LOG(DEBUG, TAG, "normal msg will be sent");
 971             CAQueueingThreadAddData(&g_sendThread, data, sizeof(CAData_t));
 972             return CA_STATUS_OK;
 973         }
 974         else
 975         {
 976             CADestroyData(data, sizeof(CAData_t));
 977         }
 978         return res;
 979     }
 980     else
 981 #endif // WITH_BWT
 982     {
 983         CAQueueingThreadAddData(&g_sendThread, data, sizeof(CAData_t));
 984     }
 985 #endif // SINGLE_THREAD
 986
 987     return CA_STATUS_OK;
 988 }
 989
 990 void CASetInterfaceCallbacks(CARequestCallback ReqHandler, CAResponseCallback RespHandler,
 991                              CAErrorCallback errorHandler)
 992 {
 993     g_requestHandler = ReqHandler;
 994     g_responseHandler = RespHandler;
 995     g_errorHandler = errorHandler;
 996 }
 997
 998 void CASetNetworkMonitorCallback(CANetworkMonitorCallback nwMonitorHandler)
 999 {
1000     g_nwMonitorHandler = nwMonitorHandler;
1001 }
1002
1003 CAResult_t CAInitializeMessageHandler()
1004 {
1005     CASetPacketReceivedCallback(CAReceivedPacketCallback);
1006     CASetErrorHandleCallback(CAErrorHandler);
1007
1008 #ifndef SINGLE_THREAD
1009     // create thread pool
1010     CAResult_t res = ca_thread_pool_init(MAX_THREAD_POOL_SIZE, &g_threadPoolHandle);
1011     if (CA_STATUS_OK != res)
1012     {
1013         OIC_LOG(ERROR, TAG, "thread pool initialize error.");
1014         return res;
1015     }
1016
1017     // send thread initialize
1018     res = CAQueueingThreadInitialize(&g_sendThread, g_threadPoolHandle,
1019                                      CASendThreadProcess, CADestroyData);
1020     if (CA_STATUS_OK != res)
1021     {
1022         OIC_LOG(ERROR, TAG, "Failed to Initialize send queue thread");
1023         ca_thread_pool_free(g_threadPoolHandle);
1024         g_threadPoolHandle = NULL;
1025         return res;
1026     }
1027
1028     // start send thread
1029     res = CAQueueingThreadStart(&g_sendThread);
1030     if (CA_STATUS_OK != res)
1031     {
1032         OIC_LOG(ERROR, TAG, "thread start error(send thread).");
1033         ca_thread_pool_free(g_threadPoolHandle);
1034         g_threadPoolHandle = NULL;
1035         CAQueueingThreadDestroy(&g_sendThread);
1036         return res;
1037     }
1038
1039     // receive thread initialize
1040     res = CAQueueingThreadInitialize(&g_receiveThread, g_threadPoolHandle,
1041                                      CAReceiveThreadProcess, CADestroyData);
1042     if (CA_STATUS_OK != res)
1043     {
1044         OIC_LOG(ERROR, TAG, "Failed to Initialize receive queue thread");
1045         ca_thread_pool_free(g_threadPoolHandle);
1046         g_threadPoolHandle = NULL;
1047         CAQueueingThreadDestroy(&g_sendThread);
1048         return res;
1049     }
1050
1051 #ifndef SINGLE_HANDLE // This will be enabled when RI supports multi threading
1052     // start receive thread
1053     res = CAQueueingThreadStart(&g_receiveThread);
1054     if (CA_STATUS_OK != res)
1055     {
1056         OIC_LOG(ERROR, TAG, "thread start error(receive thread).");
1057         ca_thread_pool_free(g_threadPoolHandle);
1058         g_threadPoolHandle = NULL;
1059         CAQueueingThreadDestroy(&g_sendThread);
1060         CAQueueingThreadDestroy(&g_receiveThread);
1061         return res;
1062     }
1063 #endif // SINGLE_HANDLE
1064
1065     // retransmission initialize
1066     res = CARetransmissionInitialize(&g_retransmissionContext, g_threadPoolHandle,
1067                                      CASendUnicastData, CATimeoutCallback, NULL);
1068     if (CA_STATUS_OK != res)
1069     {
1070         OIC_LOG(ERROR, TAG, "Failed to Initialize Retransmission.");
1071         ca_thread_pool_free(g_threadPoolHandle);
1072         g_threadPoolHandle = NULL;
1073         CAQueueingThreadDestroy(&g_sendThread);
1074         CAQueueingThreadDestroy(&g_receiveThread);
1075         return res;
1076     }
1077
1078 #ifdef WITH_BWT
1079     // block-wise transfer initialize
1080     res = CAInitializeBlockWiseTransfer(CAAddDataToSendThread, CAAddDataToReceiveThread);
1081     if (CA_STATUS_OK != res)
1082     {
1083         OIC_LOG(ERROR, TAG, "Failed to Initialize BlockWiseTransfer.");
1084         ca_thread_pool_free(g_threadPoolHandle);
1085         g_threadPoolHandle = NULL;
1086         CAQueueingThreadDestroy(&g_sendThread);
1087         CAQueueingThreadDestroy(&g_receiveThread);
1088         CARetransmissionDestroy(&g_retransmissionContext);
1089         return res;
1090     }
1091 #endif
1092
1093     // start retransmission
1094     res = CARetransmissionStart(&g_retransmissionContext);
1095     if (CA_STATUS_OK != res)
1096     {
1097         OIC_LOG(ERROR, TAG, "thread start error(retransmission thread).");
1098         ca_thread_pool_free(g_threadPoolHandle);
1099         g_threadPoolHandle = NULL;
1100         CAQueueingThreadDestroy(&g_sendThread);
1101         CAQueueingThreadDestroy(&g_receiveThread);
1102         CARetransmissionDestroy(&g_retransmissionContext);
1103         return res;
1104     }
1105
1106     // initialize interface adapters by controller
1107     CAInitializeAdapters(g_threadPoolHandle);
1108 #else
1109     // retransmission initialize
1110     CAResult_t res = CARetransmissionInitialize(&g_retransmissionContext, NULL, CASendUnicastData,
1111                                                 CATimeoutCallback, NULL);
1112     if (CA_STATUS_OK != res)
1113     {
1114         OIC_LOG(ERROR, TAG, "Failed to Initialize Retransmission.");
1115         return res;
1116     }
1117
1118     CAInitializeAdapters();
1119 #endif // SINGLE_THREAD
1120
1121     return CA_STATUS_OK;
1122 }
1123
1124 void CATerminateMessageHandler()
1125 {
1126 #ifndef SINGLE_THREAD
1127     CATransportAdapter_t connType;
1128     u_arraylist_t *list = CAGetSelectedNetworkList();
1129     uint32_t length = u_arraylist_length(list);
1130
1131     uint32_t i = 0;
1132     for (i = 0; i < length; i++)
1133     {
1134         void* ptrType = u_arraylist_get(list, i);
1135
1136         if (NULL == ptrType)
1137         {
1138             continue;
1139         }
1140
1141         connType = *(CATransportAdapter_t *)ptrType;
1142         CAStopAdapter(connType);
1143     }
1144
1145     // stop retransmission
1146     if (NULL != g_retransmissionContext.threadMutex)
1147     {
1148         CARetransmissionStop(&g_retransmissionContext);
1149     }
1150
1151     // stop thread
1152     // delete thread data
1153     if (NULL != g_sendThread.threadMutex)
1154     {
1155         CAQueueingThreadStop(&g_sendThread);
1156     }
1157
1158     // stop thread
1159     // delete thread data
1160     if (NULL != g_receiveThread.threadMutex)
1161     {
1162 #ifndef SINGLE_HANDLE // This will be enabled when RI supports multi threading
1163         CAQueueingThreadStop(&g_receiveThread);
1164 #endif
1165     }
1166
1167     // destroy thread pool
1168     if (NULL != g_threadPoolHandle)
1169     {
1170         ca_thread_pool_free(g_threadPoolHandle);
1171         g_threadPoolHandle = NULL;
1172     }
1173
1174 #ifdef WITH_BWT
1175     CATerminateBlockWiseTransfer();
1176 #endif
1177     CARetransmissionDestroy(&g_retransmissionContext);
1178     CAQueueingThreadDestroy(&g_sendThread);
1179     CAQueueingThreadDestroy(&g_receiveThread);
1180
1181     // terminate interface adapters by controller
1182     CATerminateAdapters();
1183 #else
1184     // terminate interface adapters by controller
1185     CATerminateAdapters();
1186
1187     // stop retransmission
1188     CARetransmissionStop(&g_retransmissionContext);
1189     CARetransmissionDestroy(&g_retransmissionContext);
1190 #endif // SINGLE_THREAD
1191 }
1192
1193 void CALogPDUInfo(coap_pdu_t *pdu, const CAEndpoint_t *endpoint)
1194 {
1195     VERIFY_NON_NULL_VOID(pdu, TAG, "pdu");
1196     VERIFY_NON_NULL_VOID(endpoint, TAG, "endpoint");
1197
1198     OIC_LOG_V(DEBUG, TAG, "PDU Maker - payload : %s", pdu->data);
1199
1200 #ifdef WITH_TCP
1201     if (CAIsSupportedCoAPOverTCP(endpoint->adapter))
1202     {
1203         OIC_LOG(DEBUG, TAG, "pdu header data :");
1204         OIC_LOG_BUFFER(DEBUG, TAG,  (const uint8_t *) pdu->hdr, pdu->length);
1205     }
1206     else
1207 #endif
1208     {
1209         OIC_LOG_V(DEBUG, TAG, "PDU Maker - type : %d", pdu->hdr->coap_hdr_udp_t.type);
1210
1211         OIC_LOG_V(DEBUG, TAG, "PDU Maker - code : %d", pdu->hdr->coap_hdr_udp_t.code);
1212
1213         OIC_LOG(DEBUG, TAG, "PDU Maker - token :");
1214
1215         OIC_LOG_BUFFER(DEBUG, TAG, pdu->hdr->coap_hdr_udp_t.token,
1216                        pdu->hdr->coap_hdr_udp_t.token_length);
1217     }
1218 }
1219
1220 static void CALogPayloadInfo(CAInfo_t *info)
1221 {
1222     if (info)
1223     {
1224         if (info->options)
1225         {
1226             for (uint32_t i = 0; i < info->numOptions; i++)
1227             {
1228                 OIC_LOG_V(DEBUG, TAG, "optionID: %u", info->options[i].optionID);
1229
1230                 OIC_LOG_V(DEBUG, TAG, "list: %s", info->options[i].optionData);
1231             }
1232         }
1233
1234         if (info->payload)
1235         {
1236             OIC_LOG_V(DEBUG, TAG, "payload: %p(%zu)", info->payload,
1237                       info->payloadSize);
1238         }
1239
1240         if (info->token)
1241         {
1242             OIC_LOG(DEBUG, TAG, "token:");
1243             OIC_LOG_BUFFER(DEBUG, TAG, (const uint8_t *) info->token,
1244                            info->tokenLength);
1245         }
1246         OIC_LOG_V(DEBUG, TAG, "msgID: %u", info->messageId);
1247     }
1248     else
1249     {
1250         OIC_LOG(DEBUG, TAG, "info is NULL, cannot output log data");
1251     }
1252 }
1253
1254 void CAErrorHandler(const CAEndpoint_t *endpoint,
1255                     const void *data, uint32_t dataLen,
1256                     CAResult_t result)
1257 {
1258     OIC_LOG(DEBUG, TAG, "CAErrorHandler IN");
1259
1260 #ifndef SINGLE_THREAD
1261     VERIFY_NON_NULL_VOID(endpoint, TAG, "remoteEndpoint");
1262     VERIFY_NON_NULL_VOID(data, TAG, "data");
1263
1264     uint32_t code = CA_NOT_FOUND;
1265     //Do not free remoteEndpoint and data. Currently they will be freed in data thread
1266     //Get PDU data
1267     coap_pdu_t *pdu = (coap_pdu_t *)CAParsePDU((const char *)data, dataLen, &code, endpoint);
1268     if (NULL == pdu)
1269     {
1270         OIC_LOG(ERROR, TAG, "Parse PDU failed");
1271         return;
1272     }
1273
1274     CAData_t *cadata = CAGenerateHandlerData(endpoint, NULL, pdu, CA_ERROR_DATA);
1275     if (!cadata)
1276     {
1277         OIC_LOG(ERROR, TAG, "CAErrorHandler, CAGenerateHandlerData failed!");
1278         coap_delete_pdu(pdu);
1279         return;
1280     }
1281
1282     cadata->errorInfo->result = result;
1283
1284     CAQueueingThreadAddData(&g_receiveThread, cadata, sizeof(CAData_t));
1285     coap_delete_pdu(pdu);
1286 #endif
1287
1288     OIC_LOG(DEBUG, TAG, "CAErrorHandler OUT");
1289     return;
1290 }
1291
1292 static void CASendErrorInfo(const CAEndpoint_t *endpoint, const CAInfo_t *info, CAResult_t result)
1293 {
1294     OIC_LOG(DEBUG, TAG, "CASendErrorInfo IN");
1295 #ifndef SINGLE_THREAD
1296     CAData_t *cadata = (CAData_t *) OICCalloc(1, sizeof(CAData_t));
1297     if (!cadata)
1298     {
1299         OIC_LOG(ERROR, TAG, "cadata memory allocation failed");
1300         return;
1301     }
1302
1303     CAEndpoint_t* ep = CACloneEndpoint(endpoint);
1304     if (!ep)
1305     {
1306         OIC_LOG(ERROR, TAG, "endpoint clone failed");
1307         OICFree(cadata);
1308         return;
1309     }
1310
1311     CAErrorInfo_t *errorInfo = (CAErrorInfo_t *)OICCalloc(1, sizeof (CAErrorInfo_t));
1312     if (!errorInfo)
1313     {
1314         OIC_LOG(ERROR, TAG, "errorInfo memory allocation failed");
1315         OICFree(cadata);
1316         CAFreeEndpoint(ep);
1317         return;
1318     }
1319
1320     CAResult_t res = CACloneInfo(info, &errorInfo->info);
1321     if (CA_STATUS_OK != res)
1322     {
1323         OIC_LOG(ERROR, TAG, "info clone failed");
1324         OICFree(cadata);
1325         OICFree(errorInfo);
1326         CAFreeEndpoint(ep);
1327         return;
1328     }
1329
1330     errorInfo->result = result;
1331     cadata->remoteEndpoint = ep;
1332     cadata->errorInfo = errorInfo;
1333     cadata->dataType = CA_ERROR_DATA;
1334
1335     CAQueueingThreadAddData(&g_receiveThread, cadata, sizeof(CAData_t));
1336 #endif
1337     OIC_LOG(DEBUG, TAG, "CASendErrorInfo OUT");
1338 }