resource/csdk/connectivity/src/cablockwisetransfer.c

   1 /* ****************************************************************
   2  *
   3  * Copyright 2015 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 // Defining _BSD_SOURCE or _DEFAULT_SOURCE causes header files to expose
  22 // definitions that may otherwise be skipped. Skipping can cause implicit
  23 // declaration warnings and/or bugs and subtle problems in code execution.
  24 // For glibc information on feature test macros,
  25 // Refer http://www.gnu.org/software/libc/manual/html_node/Feature-Test-Macros.html
  26 //
  27 // This file requires #define use due to random()
  28 // For details on compatibility and glibc support,
  29 // Refer http://www.gnu.org/software/libc/manual/html_node/BSD-Random.html
  30 #define _DEFAULT_SOURCE
  31 #define _BSD_SOURCE
  32
  33 #include <stdio.h>
  34 #include <stdlib.h>
  35 #include <string.h>
  36
  37 #include "caadapterutils.h"
  38 #include "cainterface.h"
  39 #include "camessagehandler.h"
  40 #include "caremotehandler.h"
  41 #include "cablockwisetransfer.h"
  42 #include "oic_malloc.h"
  43 #include "oic_string.h"
  44 #include "camutex.h"
  45 #include "logger.h"
  46
  47 #define TAG "OIC_CA_BWT"
  48
  49 #define BLOCKWISE_OPTION_BUFFER    (sizeof(unsigned int))
  50 #define BLOCK_NUMBER_IDX           4
  51 #define BLOCK_M_BIT_IDX            3
  52 #define PORT_LENGTH                2
  53
  54 #define BLOCK_SIZE(arg) (1 << ((arg) + 4))
  55
  56 // context for block-wise transfer
  57 static CABlockWiseContext_t g_context = { .sendThreadFunc = NULL,
  58                                           .receivedThreadFunc = NULL,
  59                                           .dataList = NULL };
  60
  61 static bool CACheckPayloadLength(const CAData_t *sendData)
  62 {
  63     size_t payloadLen = 0;
  64     CAGetPayloadInfo(sendData, &payloadLen);
  65
  66     // check if message has to be transfered to a block
  67     size_t maxBlockSize = BLOCK_SIZE(CA_DEFAULT_BLOCK_SIZE);
  68     OIC_LOG_V(DEBUG, TAG, "payloadLen=%zu, maxBlockSize=%zu", payloadLen, maxBlockSize);
  69
  70     if (payloadLen <= maxBlockSize)
  71     {
  72         return false;
  73     }
  74
  75     return true;
  76 }
  77
  78 CAResult_t CAInitializeBlockWiseTransfer(CASendThreadFunc sendThreadFunc,
  79                                          CAReceiveThreadFunc receivedThreadFunc)
  80 {
  81     OIC_LOG(DEBUG, TAG, "CAInitializeBlockWiseTransfer");
  82
  83     // set block-wise transfer context
  84     if (!g_context.sendThreadFunc)
  85     {
  86         g_context.sendThreadFunc = sendThreadFunc;
  87     }
  88
  89     if (!g_context.receivedThreadFunc)
  90     {
  91         g_context.receivedThreadFunc = receivedThreadFunc;
  92     }
  93
  94     if (!g_context.dataList)
  95     {
  96         g_context.dataList = u_arraylist_create();
  97     }
  98
  99     CAResult_t res = CAInitBlockWiseMutexVariables();
 100     if (CA_STATUS_OK != res)
 101     {
 102         u_arraylist_free(&g_context.dataList);
 103         g_context.dataList = NULL;
 104         OIC_LOG(ERROR, TAG, "init has failed");
 105     }
 106
 107     return res;
 108 }
 109
 110 CAResult_t CATerminateBlockWiseTransfer()
 111 {
 112     OIC_LOG(DEBUG, TAG, "CATerminateBlockWiseTransfer");
 113
 114     if (g_context.dataList)
 115     {
 116         CARemoveAllBlockDataFromList();
 117         u_arraylist_free(&g_context.dataList);
 118     }
 119
 120     CATerminateBlockWiseMutexVariables();
 121
 122     return CA_STATUS_OK;
 123 }
 124
 125 CAResult_t CAInitBlockWiseMutexVariables()
 126 {
 127     if (!g_context.blockDataListMutex)
 128     {
 129         g_context.blockDataListMutex = ca_mutex_new();
 130         if (!g_context.blockDataListMutex)
 131         {
 132             OIC_LOG(ERROR, TAG, "ca_mutex_new has failed");
 133             return CA_STATUS_FAILED;
 134         }
 135     }
 136
 137     if (!g_context.blockDataSenderMutex)
 138     {
 139         g_context.blockDataSenderMutex = ca_mutex_new();
 140         if (!g_context.blockDataSenderMutex)
 141         {
 142             OIC_LOG(ERROR, TAG, "ca_mutex_new has failed");
 143             CATerminateBlockWiseMutexVariables();
 144             return CA_STATUS_FAILED;
 145         }
 146     }
 147
 148     return CA_STATUS_OK;
 149 }
 150
 151 void CATerminateBlockWiseMutexVariables()
 152 {
 153     if (g_context.blockDataListMutex)
 154     {
 155         ca_mutex_free(g_context.blockDataListMutex);
 156         g_context.blockDataListMutex = NULL;
 157     }
 158
 159     if (g_context.blockDataSenderMutex)
 160     {
 161         ca_mutex_free(g_context.blockDataSenderMutex);
 162         g_context.blockDataSenderMutex = NULL;
 163     }
 164 }
 165
 166 CAResult_t CASendBlockWiseData(const CAData_t *sendData)
 167 {
 168     VERIFY_NON_NULL(sendData, TAG, "sendData");
 169
 170     // check if message type is CA_MSG_RESET
 171     if (sendData->requestInfo)
 172     {
 173         if (CA_MSG_RESET == sendData->requestInfo->info.type)
 174         {
 175             OIC_LOG(DEBUG, TAG, "reset message can't be sent to the block");
 176             return CA_NOT_SUPPORTED;
 177         }
 178
 179         /*
 180          * Other uses of the Block options in conjunction with multicast
 181          * messages are for further study.
 182          */
 183         if (sendData->requestInfo->isMulticast)
 184         {
 185             OIC_LOG(DEBUG, TAG, "multicast message can't be sent to the block");
 186             return CA_NOT_SUPPORTED;
 187         }
 188     }
 189     else if (sendData->responseInfo)
 190     {
 191         if (CA_MSG_RESET == sendData->responseInfo->info.type)
 192         {
 193             OIC_LOG(DEBUG, TAG, "reset message can't be sent to the block");
 194             return CA_NOT_SUPPORTED;
 195         }
 196         if (sendData->responseInfo->isMulticast)
 197         {
 198             OIC_LOG(DEBUG, TAG, "multicast message can't be sent to the block");
 199             return CA_NOT_SUPPORTED;
 200         }
 201     }
 202
 203     // #1. check if it is already included in block data list
 204     CABlockData_t *currData = NULL;
 205     CAResult_t res = CACheckBlockDataValidation(sendData, &currData);
 206     if (CA_STATUS_OK != res)
 207     {
 208         // #2. if it is not included, add the data into list
 209         if (!currData)
 210         {
 211             OIC_LOG(DEBUG, TAG, "There is no block data");
 212
 213             bool isBlock = CACheckPayloadLength(sendData);
 214             if (!isBlock)
 215             {
 216                 if (sendData->requestInfo)
 217                 {
 218                     currData = CACreateNewBlockData(sendData);
 219                     if (!currData)
 220                     {
 221                         OIC_LOG(ERROR, TAG, "failed to create block data");
 222                         return CA_MEMORY_ALLOC_FAILED;
 223                     }
 224                 }
 225                 return CA_NOT_SUPPORTED;
 226             }
 227             currData = CACreateNewBlockData(sendData);
 228             if (!currData)
 229             {
 230                 OIC_LOG(ERROR, TAG, "failed to create block data");
 231                 return CA_MEMORY_ALLOC_FAILED;
 232             }
 233         }
 234     }
 235
 236     // #3. check request/response block option type and payload length
 237     res = CACheckBlockOptionType(currData);
 238     if (CA_STATUS_OK == res)
 239     {
 240         // #4. send block message
 241         OIC_LOG(DEBUG, TAG, "send first block msg");
 242         res = CAAddSendThreadQueue(currData->sentData,
 243                                    (const CABlockDataID_t *) &currData->blockDataId);
 244         if (CA_STATUS_OK != res)
 245         {
 246             OIC_LOG(ERROR, TAG, "add has failed");
 247             return res;
 248         }
 249     }
 250
 251     return res;
 252 }
 253
 254 CAResult_t CAAddSendThreadQueue(const CAData_t *sendData, const CABlockDataID_t *blockID)
 255 {
 256     VERIFY_NON_NULL(sendData, TAG, "sendData");
 257     VERIFY_NON_NULL(blockID, TAG, "blockID");
 258
 259     CAData_t *cloneData = CACloneCAData(sendData);
 260     if (!cloneData)
 261     {
 262         OIC_LOG(ERROR, TAG, "clone has failed");
 263         CARemoveBlockDataFromList(blockID);
 264         return CA_STATUS_FAILED;
 265     }
 266
 267     if (g_context.sendThreadFunc)
 268     {
 269         ca_mutex_lock(g_context.blockDataSenderMutex);
 270         g_context.sendThreadFunc(cloneData);
 271         ca_mutex_unlock(g_context.blockDataSenderMutex);
 272     }
 273     else
 274     {
 275         CADestroyDataSet(cloneData);
 276     }
 277     return CA_STATUS_OK;
 278 }
 279
 280 CAResult_t CACheckBlockOptionType(CABlockData_t *currData)
 281 {
 282     VERIFY_NON_NULL(currData, TAG, "currData");
 283     VERIFY_NON_NULL(currData->sentData, TAG, "currData->sentData");
 284
 285     bool isBlock = CACheckPayloadLength(currData->sentData);
 286     if (!isBlock)
 287     {
 288         return CA_NOT_SUPPORTED;
 289     }
 290
 291     // set block option (COAP_OPTION_BLOCK2 or COAP_OPTION_BLOCK1)
 292     if (currData->sentData->requestInfo) // request message
 293     {
 294         currData->type = COAP_OPTION_BLOCK1;
 295     }
 296     else // response message
 297     {
 298         currData->type = COAP_OPTION_BLOCK2;
 299     }
 300
 301     return CA_STATUS_OK;
 302 }
 303
 304 // TODO make pdu const after libcoap is updated to support that.
 305 CAResult_t CAReceiveBlockWiseData(coap_pdu_t *pdu, const CAEndpoint_t *endpoint,
 306                                   const CAData_t *receivedData, size_t dataLen)
 307 {
 308     OIC_LOG(DEBUG, TAG, "CAReceiveBlockWiseData");
 309     VERIFY_NON_NULL(pdu, TAG, "pdu");
 310     VERIFY_NON_NULL(pdu->hdr, TAG, "pdu->hdr");
 311     VERIFY_NON_NULL(endpoint, TAG, "endpoint");
 312     VERIFY_NON_NULL(receivedData, TAG, "receivedData");
 313
 314     // check if received message type is CA_MSG_RESET
 315     if (CA_EMPTY == pdu->hdr->coap_hdr_udp_t.code)
 316     {
 317         OIC_LOG(DEBUG, TAG, "code is CA_EMPTY..");
 318
 319         if (!receivedData->responseInfo->info.token)
 320         {
 321             // get token from block-wise transfer list when CA_EMPTY(RST/ACK) is received
 322             CAResult_t res = CAGetTokenFromBlockDataList(pdu, endpoint,
 323                                                          receivedData->responseInfo);
 324             if (CA_STATUS_OK != res)
 325             {
 326                 OIC_LOG(ERROR, TAG, "fail to get token");
 327                 return res;
 328             }
 329         }
 330
 331         CABlockDataID_t* blockDataID = CACreateBlockDatablockId(
 332                 receivedData->responseInfo->info.token,
 333                 receivedData->responseInfo->info.tokenLength,
 334                 endpoint->port);
 335         if (NULL == blockDataID || blockDataID->idLength < 1)
 336         {
 337             // if retransmission is timeout, callback msg will be send without token.
 338             if (NULL == blockDataID && !receivedData->responseInfo->info.token)
 339             {
 340                 OIC_LOG(INFO, TAG, "retransmission was stopped");
 341                 return CA_REQUEST_TIMEOUT;
 342             }
 343
 344             OIC_LOG(ERROR, TAG, "blockId is null");
 345             CADestroyBlockID(blockDataID);
 346             return CA_STATUS_FAILED;
 347         }
 348
 349         CARemoveBlockDataFromList(blockDataID);
 350         CADestroyBlockID(blockDataID);
 351         return CA_NOT_SUPPORTED;
 352     }
 353
 354     // check if block option is set and get block data
 355     coap_block_t block = { 0, 0, 0 };
 356
 357     // get block1 option
 358     int isBlock1 = coap_get_block(pdu, COAP_OPTION_BLOCK1, &block);
 359     if (isBlock1)
 360     {
 361         CAResult_t res = CASetNextBlockOption1(pdu, endpoint, receivedData, block, dataLen);
 362         if (CA_STATUS_OK != res)
 363         {
 364             OIC_LOG(ERROR, TAG, "setting has failed");
 365             return res;
 366         }
 367     }
 368
 369     // get block2 option
 370     int isBlock2 = coap_get_block(pdu, COAP_OPTION_BLOCK2, &block);
 371     if (isBlock2)
 372     {
 373         CAResult_t res = CASetNextBlockOption2(pdu, endpoint, receivedData, block, dataLen);
 374         if (CA_STATUS_OK != res)
 375         {
 376             OIC_LOG(ERROR, TAG, "setting has failed");
 377             return res;
 378         }
 379     }
 380
 381     // if there is no block option in pdu, check if there is error code.
 382     if (!isBlock1 && !isBlock2)
 383     {
 384         CABlockDataID_t* blockDataID = CACreateBlockDatablockId(
 385                 (CAToken_t)pdu->hdr->coap_hdr_udp_t.token,
 386                 pdu->hdr->coap_hdr_udp_t.token_length,
 387                 endpoint->port);
 388         if (NULL == blockDataID || blockDataID->idLength < 1)
 389         {
 390             OIC_LOG(ERROR, TAG, "blockId is null");
 391             CADestroyBlockID(blockDataID);
 392             return CA_STATUS_FAILED;
 393         }
 394
 395         uint32_t code = CA_RESPONSE_CODE(pdu->hdr->coap_hdr_udp_t.code);
 396         if (CA_REQUEST_ENTITY_INCOMPLETE == code)
 397         {
 398             CABlockData_t *data = CAGetBlockDataFromBlockDataList(blockDataID);
 399             if (!data)
 400             {
 401                 OIC_LOG(ERROR, TAG, "getting has failed");
 402                 CADestroyBlockID(blockDataID);
 403                 return CA_STATUS_FAILED;
 404             }
 405
 406             coap_block_t *block = CAGetBlockOption(blockDataID, data->type);
 407             if (!block)
 408             {
 409                 OIC_LOG(ERROR, TAG, "block is null");
 410                 CADestroyBlockID(blockDataID);
 411                 return CA_STATUS_FAILED;
 412             }
 413
 414             CAResult_t res = CA_STATUS_OK;
 415             if (COAP_OPTION_BLOCK2 == data->type)
 416             {
 417                 res = CASetNextBlockOption2(pdu, endpoint, receivedData, *block, dataLen);
 418                 if (CA_STATUS_OK != res)
 419                 {
 420                     OIC_LOG(ERROR, TAG, "setting has failed");
 421                     CADestroyBlockID(blockDataID);
 422                     return CA_STATUS_FAILED;
 423                 }
 424             }
 425             else if (COAP_OPTION_BLOCK1 == data->type)
 426             {
 427                 res = CASetNextBlockOption1(pdu, endpoint, receivedData, *block, dataLen);
 428                 if (CA_STATUS_OK != res)
 429                 {
 430                     OIC_LOG(ERROR, TAG, "setting has failed");
 431                     CADestroyBlockID(blockDataID);
 432                     return res;
 433                 }
 434             }
 435             CADestroyBlockID(blockDataID);
 436         }
 437         else
 438         {
 439             // normal pdu data
 440             OIC_LOG(DEBUG, TAG, "it's normal pdu");
 441
 442             // if received data is response message
 443             // and sent data remain in block data list, remove block data
 444             if (receivedData->responseInfo)
 445             {
 446                 CARemoveBlockDataFromList(blockDataID);
 447             }
 448             CADestroyBlockID(blockDataID);
 449             return CA_NOT_SUPPORTED;
 450         }
 451     }
 452     return CA_STATUS_OK;
 453 }
 454
 455 CAResult_t CAProcessNextStep(const coap_pdu_t *pdu, const CAData_t *receivedData,
 456                              uint8_t blockWiseStatus, const CABlockDataID_t *blockID)
 457 {
 458     VERIFY_NON_NULL(pdu, TAG, "pdu");
 459     VERIFY_NON_NULL(pdu->hdr, TAG, "pdu->hdr");
 460     VERIFY_NON_NULL(blockID, TAG, "blockID");
 461
 462     CAResult_t res = CA_STATUS_OK;
 463     CAData_t *data = NULL;
 464
 465     // process blockWiseStatus
 466     switch (blockWiseStatus)
 467     {
 468         case CA_OPTION2_FIRST_BLOCK:
 469             res = CAAddSendThreadQueue(receivedData, blockID);
 470             if (CA_STATUS_OK != res)
 471             {
 472                 OIC_LOG(ERROR, TAG, "add has failed");
 473                 return res;
 474             }
 475             break;
 476
 477         case CA_OPTION2_REQUEST:
 478             // add data to send thread
 479             data = CAGetDataSetFromBlockDataList(blockID);
 480             if (!data)
 481             {
 482                 OIC_LOG(ERROR, TAG, "it's unavailable");
 483                 return CA_STATUS_FAILED;
 484             }
 485
 486             if (data->requestInfo)
 487             {
 488                 data->requestInfo->info.messageId = pdu->hdr->coap_hdr_udp_t.id;
 489             }
 490
 491             if (data->responseInfo)
 492             {
 493                 data->responseInfo->info.messageId = pdu->hdr->coap_hdr_udp_t.id;
 494             }
 495
 496             res = CAAddSendThreadQueue(data, blockID);
 497             if (CA_STATUS_OK != res)
 498             {
 499                 OIC_LOG(ERROR, TAG, "add has failed");
 500                 return res;
 501             }
 502
 503             break;
 504
 505         case CA_OPTION1_RESPONSE:
 506         case CA_OPTION2_RESPONSE:
 507         case CA_OPTION1_REQUEST_BLOCK:
 508             res = CASendBlockMessage(pdu, pdu->hdr->coap_hdr_udp_t.type, blockID);
 509             if (CA_STATUS_OK != res)
 510             {
 511                 OIC_LOG(ERROR, TAG, "send has failed");
 512                 return res;
 513             }
 514             break;
 515
 516         case CA_OPTION2_LAST_BLOCK:
 517             // process last block and send upper layer
 518             res = CAReceiveLastBlock(blockID, receivedData);
 519             if (CA_STATUS_OK != res)
 520             {
 521                 OIC_LOG(ERROR, TAG, "receive has failed");
 522                 return res;
 523             }
 524
 525             // remove data from list
 526             res = CARemoveBlockDataFromList(blockID);
 527             if (CA_STATUS_OK != res)
 528             {
 529                 OIC_LOG(ERROR, TAG, "remove has failed");
 530                 return res;
 531             }
 532             break;
 533
 534         case CA_OPTION1_REQUEST_LAST_BLOCK:
 535             // process last block and send upper layer
 536             res = CAReceiveLastBlock(blockID, receivedData);
 537             if (CA_STATUS_OK != res)
 538             {
 539                 OIC_LOG(ERROR, TAG, "receive has failed");
 540                 return res;
 541             }
 542             break;
 543
 544         case CA_BLOCK_INCOMPLETE:
 545             // add data to send thread
 546             res = CASendErrorMessage(pdu, blockWiseStatus, CA_REQUEST_ENTITY_INCOMPLETE, blockID);
 547             if (CA_STATUS_OK != res)
 548             {
 549                 OIC_LOG(ERROR, TAG, "send has failed");
 550                 return res;
 551             }
 552             break;
 553
 554         case CA_BLOCK_TOO_LARGE:
 555             if (receivedData->requestInfo)
 556             {
 557                 res = CASendErrorMessage(pdu, blockWiseStatus, CA_REQUEST_ENTITY_TOO_LARGE,
 558                                          blockID);
 559                 if (CA_STATUS_OK != res)
 560                 {
 561                     OIC_LOG(ERROR, TAG, "send has failed");
 562                     return res;
 563                 }
 564             }
 565             else if (receivedData->responseInfo)
 566             {
 567                 res = CASendBlockMessage(pdu, pdu->hdr->coap_hdr_udp_t.type, blockID);
 568                 if (CA_STATUS_OK != res)
 569                 {
 570                     OIC_LOG(ERROR, TAG, "send has failed");
 571                     return res;
 572                 }
 573             }
 574             break;
 575         default:
 576             OIC_LOG_V(ERROR, TAG, "no logic [%d]", blockWiseStatus);
 577     }
 578     return CA_STATUS_OK;
 579 }
 580
 581 CAResult_t CASendBlockMessage(const coap_pdu_t *pdu, CAMessageType_t msgType,
 582                               const CABlockDataID_t *blockID)
 583 {
 584     VERIFY_NON_NULL(pdu, TAG, "pdu");
 585     VERIFY_NON_NULL(pdu->hdr, TAG, "pdu->hdr");
 586     VERIFY_NON_NULL(blockID, TAG, "blockID");
 587
 588     CAData_t *data = CAGetDataSetFromBlockDataList(blockID);
 589     if (!data)
 590     {
 591         OIC_LOG(ERROR, TAG, "CAData is unavailable");
 592         return CA_STATUS_FAILED;
 593     }
 594
 595     CAMessageType_t sentMsgType = CA_MSG_NONCONFIRM;
 596     switch (msgType)
 597     {
 598         case CA_MSG_CONFIRM:
 599             sentMsgType = CA_MSG_ACKNOWLEDGE;
 600             break;
 601         case CA_MSG_ACKNOWLEDGE:
 602             sentMsgType = CA_MSG_CONFIRM;
 603             break;
 604         default:
 605             sentMsgType = CA_MSG_NONCONFIRM;
 606             break;
 607     }
 608
 609     uint32_t code = pdu->hdr->coap_hdr_udp_t.code;
 610     if (CA_GET == code || CA_POST == code || CA_PUT == code || CA_DELETE == code)
 611     {
 612         if (data->responseInfo)
 613         {
 614             OIC_LOG(DEBUG, TAG, "set response info");
 615             data->responseInfo->info.messageId = pdu->hdr->coap_hdr_udp_t.id;
 616             data->responseInfo->info.type = sentMsgType;
 617             data->responseInfo->result = CA_CONTINUE;
 618         }
 619     }
 620     else
 621     {
 622         OIC_LOG(DEBUG, TAG, "need new msgID");
 623         if (data->requestInfo)
 624         {
 625             data->requestInfo->info.messageId = 0;
 626             data->requestInfo->info.type = sentMsgType;
 627         }
 628     }
 629
 630     // add data to send thread
 631     CAResult_t res = CAAddSendThreadQueue(data, blockID);
 632     if (CA_STATUS_OK != res)
 633     {
 634         OIC_LOG(ERROR, TAG, "add has failed");
 635     }
 636
 637     return res;
 638 }
 639
 640 CAResult_t CASendErrorMessage(const coap_pdu_t *pdu, uint8_t status,
 641                               CAResponseResult_t responseResult, const CABlockDataID_t *blockID)
 642 {
 643     VERIFY_NON_NULL(pdu, TAG, "pdu");
 644     VERIFY_NON_NULL(pdu->hdr, TAG, "pdu->hdr");
 645     VERIFY_NON_NULL(blockID, TAG, "blockID");
 646
 647     // create error responseInfo
 648     CABlockData_t *data = CAGetBlockDataFromBlockDataList(blockID);
 649     if (!data)
 650     {
 651         OIC_LOG(ERROR, TAG, "data is unavailable");
 652         return CA_STATUS_FAILED;
 653     }
 654
 655     CAMessageType_t sentMsgType = CA_MSG_NONCONFIRM;
 656     switch (pdu->hdr->coap_hdr_udp_t.type)
 657     {
 658         case CA_MSG_CONFIRM:
 659             sentMsgType = CA_MSG_ACKNOWLEDGE;
 660             break;
 661         case CA_MSG_ACKNOWLEDGE:
 662             sentMsgType = CA_MSG_CONFIRM;
 663             break;
 664     }
 665
 666     CAData_t *cloneData = NULL;
 667     if (data->sentData)
 668     {
 669         cloneData = CACloneCAData(data->sentData);
 670         if (!cloneData)
 671         {
 672             OIC_LOG(ERROR, TAG, "clone has failed");
 673             return CA_MEMORY_ALLOC_FAILED;
 674         }
 675
 676         if (cloneData->responseInfo)
 677         {
 678             cloneData->responseInfo->info.messageId = pdu->hdr->coap_hdr_udp_t.id;
 679             cloneData->responseInfo->info.type = sentMsgType;
 680             cloneData->responseInfo->result = responseResult;
 681         }
 682         else
 683         {
 684             CAInfo_t responseData = { .tokenLength = pdu->hdr->coap_hdr_udp_t.token_length };
 685             responseData.token = (CAToken_t) OICMalloc(responseData.tokenLength);
 686             if (!responseData.token)
 687             {
 688                 OIC_LOG(ERROR, TAG, "out of memory");
 689                 return CA_MEMORY_ALLOC_FAILED;
 690             }
 691             memcpy(responseData.token, pdu->hdr->coap_hdr_udp_t.token, responseData.tokenLength);
 692
 693             cloneData->responseInfo = (CAResponseInfo_t*) OICCalloc(1, sizeof(CAResponseInfo_t));
 694             if (!cloneData->responseInfo)
 695             {
 696                 OIC_LOG(ERROR, TAG, "out of memory");
 697                 OICFree(responseData.token);
 698                 return CA_MEMORY_ALLOC_FAILED;
 699             }
 700
 701             cloneData->responseInfo->info = responseData;
 702             cloneData->responseInfo->info.type = sentMsgType;
 703             cloneData->responseInfo->result = responseResult;
 704         }
 705         OIC_LOG(DEBUG, TAG, "set response message to send error code");
 706     }
 707     else
 708     {
 709         OIC_LOG(ERROR, TAG, "data has no sent-data");
 710         return CA_MEMORY_ALLOC_FAILED;
 711     }
 712
 713     // if there is a requestInfo, remove it to send response message
 714     if (cloneData->requestInfo)
 715     {
 716         CADestroyRequestInfoInternal(cloneData->requestInfo);
 717         cloneData->requestInfo = NULL;
 718     }
 719
 720     // add data to send thread
 721     if (g_context.sendThreadFunc)
 722     {
 723         ca_mutex_lock(g_context.blockDataSenderMutex);
 724         g_context.sendThreadFunc(cloneData);
 725         ca_mutex_unlock(g_context.blockDataSenderMutex);
 726     }
 727     else
 728     {
 729         CADestroyDataSet(cloneData);
 730     }
 731
 732     // if error code is 4.08, remove the stored payload and initialize block number
 733     if (CA_BLOCK_INCOMPLETE == status)
 734     {
 735         OICFree(data->payload);
 736         data->payload = NULL;
 737         data->payloadLength = 0;
 738         data->receivedPayloadLen = 0;
 739         data->block1.num = 0;
 740         data->block2.num = 0;
 741     }
 742
 743     return CA_STATUS_OK;
 744 }
 745
 746 CAResult_t CAReceiveLastBlock(const CABlockDataID_t *blockID, const CAData_t *receivedData)
 747 {
 748     VERIFY_NON_NULL(blockID, TAG, "blockID");
 749     VERIFY_NON_NULL(receivedData, TAG, "receivedData");
 750
 751     // total block data have to notify to Application
 752     CAData_t *cloneData = CACloneCAData(receivedData);
 753     if (!cloneData)
 754     {
 755         OIC_LOG(ERROR, TAG, "clone has failed");
 756         return CA_MEMORY_ALLOC_FAILED;
 757     }
 758
 759     // update payload
 760     size_t fullPayloadLen = 0;
 761     CAPayload_t fullPayload = CAGetPayloadFromBlockDataList(blockID, &fullPayloadLen);
 762     if (fullPayload)
 763     {
 764         CAResult_t res = CAUpdatePayloadToCAData(cloneData, fullPayload, fullPayloadLen);
 765         if (CA_STATUS_OK != res)
 766         {
 767             OIC_LOG(ERROR, TAG, "update has failed");
 768             CADestroyDataSet(cloneData);
 769             return res;
 770         }
 771     }
 772
 773     if (g_context.receivedThreadFunc)
 774     {
 775         g_context.receivedThreadFunc(cloneData);
 776     }
 777     else
 778     {
 779         CADestroyDataSet(cloneData);
 780     }
 781
 782     return CA_STATUS_OK;
 783 }
 784
 785 // TODO make pdu const after libcoap is updated to support that.
 786 CAResult_t CASetNextBlockOption1(coap_pdu_t *pdu, const CAEndpoint_t *endpoint,
 787                                  const CAData_t *receivedData, coap_block_t block,
 788                                  size_t dataLen)
 789 {
 790     OIC_LOG(INFO, TAG, "CASetNextBlockOption1");
 791     VERIFY_NON_NULL(pdu, TAG, "pdu");
 792     VERIFY_NON_NULL(pdu->hdr, TAG, "pdu->hdr");
 793     VERIFY_NON_NULL(endpoint, TAG, "endpoint");
 794     VERIFY_NON_NULL(receivedData, TAG, "receivedData");
 795
 796     OIC_LOG_V(INFO, TAG, "num:%d, M:%d, sze:%d", block.num, block.m, block.szx);
 797
 798     CABlockDataID_t* blockDataID = CACreateBlockDatablockId(
 799             (CAToken_t)pdu->hdr->coap_hdr_udp_t.token,
 800             pdu->hdr->coap_hdr_udp_t.token_length,
 801             endpoint->port);
 802     if (NULL == blockDataID || blockDataID->idLength < 1)
 803     {
 804         OIC_LOG(ERROR, TAG, "blockId is null");
 805         CADestroyBlockID(blockDataID);
 806         return CA_STATUS_FAILED;
 807     }
 808
 809     // Get BlockData data. If does not exist, create a new data
 810     CABlockData_t *data = CAGetBlockDataFromBlockDataList(blockDataID);
 811     if (!data)
 812     {
 813         OIC_LOG(DEBUG, TAG, "block data doesn't exist in list. create new one");
 814
 815         CAData_t *cadata = CACreateNewDataSet(pdu, endpoint);
 816         if (!cadata)
 817         {
 818             OIC_LOG(ERROR, TAG, "data is null");
 819             CADestroyBlockID(blockDataID);
 820             return CA_STATUS_FAILED;
 821         }
 822
 823         data = CACreateNewBlockData(cadata);
 824         if (!data)
 825         {
 826             OIC_LOG(ERROR, TAG, "failed to create a new block data");
 827             CADestroyDataSet(cadata);
 828             CADestroyBlockID(blockDataID);
 829             return CA_STATUS_FAILED;
 830         }
 831         CADestroyDataSet(cadata);
 832     }
 833
 834     // update BLOCK OPTION1 type
 835     CAResult_t res = CAUpdateBlockOptionType(blockDataID, COAP_OPTION_BLOCK1);
 836     if (CA_STATUS_OK != res)
 837     {
 838         OIC_LOG(ERROR, TAG, "update has failed");
 839         goto exit;
 840     }
 841
 842     uint8_t blockWiseStatus = CA_BLOCK_UNKNOWN;
 843     uint32_t code = pdu->hdr->coap_hdr_udp_t.code;
 844     if (CA_GET == code || CA_POST == code || CA_PUT == code || CA_DELETE == code)
 845     {
 846         // received message type is request
 847         OIC_LOG_V(INFO, TAG, "num:%d, M:%d", block.num, block.m);
 848
 849         // check the size option
 850         bool isSizeOption = CAIsPayloadLengthInPduWithBlockSizeOption(pdu, COAP_OPTION_SIZE1,
 851                                                                       &(data->payloadLength));
 852
 853         blockWiseStatus = CACheckBlockErrorType(data, &block, receivedData,
 854                                                 COAP_OPTION_BLOCK1, dataLen);
 855
 856         if (CA_BLOCK_RECEIVED_ALREADY != blockWiseStatus)
 857         {
 858             // store the received payload and merge
 859             res = CAUpdatePayloadData(data, receivedData, blockWiseStatus,
 860                                       isSizeOption, COAP_OPTION_BLOCK1);
 861             if (CA_STATUS_OK != res)
 862             {
 863                 OIC_LOG(ERROR, TAG, "update has failed");
 864                 goto exit;
 865             }
 866
 867             res = CAUpdateBlockOptionItems(data, pdu, &block, COAP_OPTION_BLOCK1,
 868                                            blockWiseStatus);
 869             if (CA_STATUS_OK != res)
 870             {
 871                 OIC_LOG(ERROR, TAG, "update has failed");
 872                 goto exit;
 873             }
 874
 875             // update block data
 876             res = CAUpdateBlockData(data, block, COAP_OPTION_BLOCK1);
 877             if (CA_STATUS_OK != res)
 878             {
 879                 OIC_LOG(ERROR, TAG, "update has failed");
 880                 goto exit;
 881             }
 882         }
 883
 884         // check the blcok-wise transfer status for next step
 885         if (CA_BLOCK_UNKNOWN == blockWiseStatus || CA_BLOCK_RECEIVED_ALREADY == blockWiseStatus)
 886         {
 887             OIC_LOG_V(DEBUG, TAG, "M bit is %d", block.m);
 888
 889             if (0 == block.m)
 890             {
 891                 // Last block is received
 892                 blockWiseStatus = CA_OPTION1_REQUEST_LAST_BLOCK;
 893             }
 894             else
 895             {
 896                 blockWiseStatus = CA_OPTION1_REQUEST_BLOCK;
 897             }
 898         }
 899     }
 900     else
 901     {
 902         // received message type is response
 903         uint32_t code = CA_RESPONSE_CODE(pdu->hdr->coap_hdr_udp_t.code);
 904         if (0 == block.m && (CA_REQUEST_ENTITY_INCOMPLETE != code
 905                 && CA_REQUEST_ENTITY_TOO_LARGE != code))
 906         {
 907             int isBlock2 = coap_get_block(pdu, COAP_OPTION_BLOCK2, &block);
 908             if (isBlock2)
 909             {
 910                 OIC_LOG(INFO, TAG, "received data is combining block1 and block2");
 911                 // initialize block number for response message
 912                 data->block1.num = 0;
 913                 CADestroyBlockID(blockDataID);
 914                 return CA_STATUS_OK;
 915             }
 916             else
 917             {
 918                 OIC_LOG(INFO, TAG, "received data is not bulk data");
 919                 CAReceiveLastBlock(blockDataID, receivedData);
 920                 res = CA_STATUS_OK;
 921                 goto exit;
 922             }
 923         }
 924
 925         blockWiseStatus = CA_OPTION1_RESPONSE;
 926         res = CAUpdateBlockOptionItems(data, pdu, &block, COAP_OPTION_BLOCK1, blockWiseStatus);
 927         if (CA_STATUS_OK != res)
 928         {
 929             OIC_LOG(ERROR, TAG, "update has failed");
 930             CADestroyBlockID(blockDataID);
 931             return res;
 932         }
 933
 934         res = CAUpdateBlockData(data, block, COAP_OPTION_BLOCK1);
 935         if (CA_STATUS_OK != res)
 936         {
 937             OIC_LOG(ERROR, TAG, "update has failed");
 938             goto exit;
 939         }
 940     }
 941
 942     res = CAProcessNextStep(pdu, receivedData, blockWiseStatus, blockDataID);
 943     if (CA_STATUS_OK != res)
 944     {
 945         OIC_LOG(ERROR, TAG, "setting has failed");
 946         goto exit;
 947     }
 948
 949     CADestroyBlockID(blockDataID);
 950     return res;
 951
 952 exit:
 953     CARemoveBlockDataFromList(blockDataID);
 954     CADestroyBlockID(blockDataID);
 955     return res;
 956 }
 957
 958 // TODO make pdu const after libcoap is updated to support that.
 959 CAResult_t CASetNextBlockOption2(coap_pdu_t *pdu, const CAEndpoint_t *endpoint,
 960                                  const CAData_t *receivedData, coap_block_t block,
 961                                  size_t dataLen)
 962 {
 963     OIC_LOG(DEBUG, TAG, "CASetNextBlockOption2");
 964     OIC_LOG_V(INFO, TAG, "num:%d, M:%d, sze:%d", block.num, block.m, block.szx);
 965
 966     VERIFY_NON_NULL(pdu, TAG, "pdu");
 967     VERIFY_NON_NULL(pdu->hdr, TAG, "pdu->hdr");
 968     VERIFY_NON_NULL(endpoint, TAG, "endpoint");
 969     VERIFY_NON_NULL(receivedData, TAG, "receivedData");
 970
 971     CABlockDataID_t* blockDataID = CACreateBlockDatablockId(
 972             (CAToken_t)pdu->hdr->coap_hdr_udp_t.token,
 973             pdu->hdr->coap_hdr_udp_t.token_length,
 974             endpoint->port);
 975     if (NULL == blockDataID || blockDataID->idLength < 1)
 976     {
 977         OIC_LOG(ERROR, TAG, "blockId is null");
 978         CADestroyBlockID(blockDataID);
 979         return CA_STATUS_FAILED;
 980     }
 981
 982     // Get BlockData data. If does not exist, create a new data
 983     CABlockData_t *data = CAGetBlockDataFromBlockDataList(blockDataID);
 984     if (!data)
 985     {
 986         OIC_LOG(DEBUG, TAG, "block data doesn't exist in list. create new one");
 987
 988         CAData_t *cadata = CACreateNewDataSet(pdu, endpoint);
 989         if (!cadata)
 990         {
 991             OIC_LOG(ERROR, TAG, "data is null");
 992             CADestroyBlockID(blockDataID);
 993             return CA_STATUS_FAILED;
 994         }
 995
 996         data = CACreateNewBlockData(cadata);
 997         if (!data)
 998         {
 999             OIC_LOG(ERROR, TAG, "failed to create a new block data");
1000             CADestroyDataSet(cadata);
1001             CADestroyBlockID(blockDataID);
1002             return CA_STATUS_FAILED;
1003         }
1004         CADestroyDataSet(cadata);
1005     }
1006
1007     // set Block Option Type
1008     CAResult_t res = CAUpdateBlockOptionType(blockDataID, COAP_OPTION_BLOCK2);
1009     if (CA_STATUS_OK != res)
1010     {
1011         OIC_LOG(ERROR, TAG, "update has failed");
1012         goto exit;
1013     }
1014
1015     uint8_t blockWiseStatus = CA_BLOCK_UNKNOWN;
1016     if (0 == block.num && CA_GET == pdu->hdr->coap_hdr_udp_t.code && 0 == block.m)
1017     {
1018         OIC_LOG(INFO, TAG, "first block number");
1019
1020         res = CAUpdateBlockOptionItems(data, pdu, &block, COAP_OPTION_BLOCK2, blockWiseStatus);
1021         if (CA_STATUS_OK != res)
1022         {
1023             OIC_LOG(ERROR, TAG, "update has failed");
1024             goto exit;
1025         }
1026
1027         // first block data have to notify to Application
1028         res = CAUpdateBlockData(data, block, COAP_OPTION_BLOCK2);
1029         if (CA_STATUS_OK != res)
1030         {
1031             OIC_LOG(ERROR, TAG, "update has failed");
1032             goto exit;
1033         }
1034         blockWiseStatus = CA_OPTION2_FIRST_BLOCK;
1035     }
1036     else
1037     {
1038         uint32_t code = pdu->hdr->coap_hdr_udp_t.code;
1039         if (CA_GET == code || CA_POST == code || CA_PUT == code || CA_DELETE == code)
1040         {
1041             // received message type is request
1042             OIC_LOG_V(INFO, TAG, "num:%d, M:%d", block.num, block.m);
1043
1044             blockWiseStatus = CA_OPTION2_REQUEST;
1045
1046             res = CAUpdateBlockOptionItems(data, pdu, &block, COAP_OPTION_BLOCK2, blockWiseStatus);
1047             if (CA_STATUS_OK != res)
1048             {
1049                 OIC_LOG(ERROR, TAG, "update has failed");
1050                 goto exit;
1051             }
1052
1053             res = CAUpdateBlockData(data, block, COAP_OPTION_BLOCK2);
1054             if (CA_STATUS_OK != res)
1055             {
1056                 OIC_LOG(ERROR, TAG, "update has failed");
1057                 goto exit;
1058             }
1059         }
1060         else
1061         {
1062             // received message type is response
1063             OIC_LOG(DEBUG, TAG, "received response message with block option2");
1064
1065             // check the size option
1066             bool isSizeOption = CAIsPayloadLengthInPduWithBlockSizeOption(pdu,
1067                                                                           COAP_OPTION_SIZE2,
1068                                                                           &(data->payloadLength));
1069
1070             uint32_t code = CA_RESPONSE_CODE(pdu->hdr->coap_hdr_udp_t.code);
1071             if (CA_REQUEST_ENTITY_INCOMPLETE != code && CA_REQUEST_ENTITY_TOO_LARGE != code)
1072             {
1073                 // check if received payload is exact
1074                 blockWiseStatus = CACheckBlockErrorType(data, &block, receivedData,
1075                                                         COAP_OPTION_BLOCK2, dataLen);
1076             }
1077
1078             if (CA_BLOCK_RECEIVED_ALREADY != blockWiseStatus)
1079             {
1080                 // store the received payload and merge
1081                 res = CAUpdatePayloadData(data, receivedData, blockWiseStatus,
1082                                           isSizeOption, COAP_OPTION_BLOCK2);
1083                 if (CA_STATUS_OK != res)
1084                 {
1085                     OIC_LOG(ERROR, TAG, "update has failed");
1086                     goto exit;
1087                 }
1088             }
1089
1090             if (0 == block.m && CA_BLOCK_UNKNOWN == blockWiseStatus) // Last block is received
1091             {
1092                 OIC_LOG(DEBUG, TAG, "M bit is 0");
1093                 blockWiseStatus = CA_OPTION2_LAST_BLOCK;
1094             }
1095             else
1096             {
1097                 if (CA_BLOCK_UNKNOWN == blockWiseStatus ||
1098                         CA_BLOCK_RECEIVED_ALREADY == blockWiseStatus)
1099                 {
1100                     OIC_LOG(DEBUG, TAG, "M bit is 1");
1101                     blockWiseStatus = CA_OPTION2_RESPONSE;
1102                 }
1103
1104                 res = CAUpdateBlockOptionItems(data, pdu, &block, COAP_OPTION_BLOCK2,
1105                                                blockWiseStatus);
1106                 if (CA_STATUS_OK != res)
1107                 {
1108                     OIC_LOG(ERROR, TAG, "update has failed");
1109                     goto exit;
1110                 }
1111
1112                 res = CAUpdateBlockData(data, block, COAP_OPTION_BLOCK2);
1113                 if (CA_STATUS_OK != res)
1114                 {
1115                     OIC_LOG(ERROR, TAG, "update has failed");
1116                     goto exit;
1117                 }
1118             }
1119         }
1120     }
1121
1122     res = CAProcessNextStep(pdu, receivedData, blockWiseStatus, blockDataID);
1123     if (CA_STATUS_OK != res)
1124     {
1125         OIC_LOG(ERROR, TAG, "setting has failed");
1126         goto exit;
1127     }
1128
1129     CADestroyBlockID(blockDataID);
1130     return CA_STATUS_OK;
1131
1132 exit:
1133     CARemoveBlockDataFromList(blockDataID);
1134     CADestroyBlockID(blockDataID);
1135     return res;
1136 }
1137
1138 CAResult_t CAUpdateBlockOptionItems(CABlockData_t *currData, const coap_pdu_t *pdu,
1139                                     coap_block_t *block, uint16_t blockType,
1140                                     uint32_t status)
1141 {
1142     VERIFY_NON_NULL(currData, TAG, "currData");
1143     VERIFY_NON_NULL(pdu, TAG, "pdu");
1144     VERIFY_NON_NULL(block, TAG, "block");
1145
1146     // update block data
1147     CAResult_t res = CA_STATUS_OK;
1148     uint32_t code = CA_RESPONSE_CODE(pdu->hdr->coap_hdr_udp_t.code);
1149
1150     if (CA_REQUEST_ENTITY_INCOMPLETE == code || CA_REQUEST_ENTITY_TOO_LARGE == code)
1151     {
1152         // response error code of the received block message
1153         res = CAHandleBlockErrorResponse(block, blockType, code);
1154         if (CA_STATUS_OK != res)
1155         {
1156             OIC_LOG(ERROR, TAG, "error handle has failed");
1157             return res;
1158         }
1159     }
1160     else
1161     {
1162         // update block option items
1163         switch (status)
1164         {
1165             case CA_OPTION1_RESPONSE:
1166                 if (currData->block1.num > block->num)
1167                 {
1168                     OIC_LOG(ERROR, TAG, "received incorrect block num");
1169                     return CA_STATUS_FAILED;
1170                 }
1171                 block->num++;
1172                 break;
1173             case CA_OPTION2_REQUEST:
1174                 block->m = 0;
1175                 break;
1176             case CA_OPTION2_RESPONSE:
1177                 if (currData->block2.num > block->num)
1178                 {
1179                     OIC_LOG(ERROR, TAG, "received incorrect block num");
1180                     return CA_STATUS_FAILED;
1181                 }
1182                 block->num++;
1183                 block->m = 0;
1184                 break;
1185             case CA_BLOCK_TOO_LARGE:
1186                 // if state of received block message is CA_BLOCK_TOO_LARGE or CA_BLOCK_INCOMPLETE
1187                 // we set the response error code appropriately and send
1188                 if (COAP_OPTION_BLOCK2 == blockType)
1189                 {
1190                     block->num++;
1191                     block->m = 0;
1192                     block->szx = currData->block2.szx;
1193                 }
1194                 else
1195                 {
1196                     block->szx = currData->block1.szx;
1197                 }
1198                 break;
1199             default:
1200                 OIC_LOG_V(ERROR, TAG, "no logic [%d]", status);
1201         }
1202
1203         if (CA_BLOCK_INCOMPLETE != status && CA_BLOCK_TOO_LARGE != status)
1204         {
1205             // negotiate block size
1206             res = CANegotiateBlockSize(currData, block, pdu, blockType);
1207             if (CA_STATUS_OK != res)
1208             {
1209                 OIC_LOG(ERROR, TAG, "negotiation has failed");
1210                 return res;
1211             }
1212         }
1213     }
1214     return res;
1215 }
1216
1217 CAResult_t CASetMoreBitFromBlock(size_t payloadLen, coap_block_t *block)
1218 {
1219     VERIFY_NON_NULL(block, TAG, "block");
1220
1221     if ((size_t) ((block->num + 1) << (block->szx + BLOCK_NUMBER_IDX)) < payloadLen)
1222     {
1223         OIC_LOG(DEBUG, TAG, "Set the M-bit(1)");
1224         block->m = 1;
1225     }
1226     else
1227     {
1228         OIC_LOG(DEBUG, TAG, "Set the M-bit(0)");
1229         block->m = 0;
1230     }
1231
1232     return CA_STATUS_OK;
1233 }
1234
1235 CAResult_t CANegotiateBlockSize(CABlockData_t *currData, coap_block_t *block,
1236                                 const coap_pdu_t *pdu, uint16_t blockType)
1237 {
1238     OIC_LOG(DEBUG, TAG, "IN-NegotiateBlockSize");
1239
1240     VERIFY_NON_NULL(currData, TAG, "currData");
1241     VERIFY_NON_NULL(block, TAG, "block");
1242     VERIFY_NON_NULL(pdu, TAG, "pdu");
1243     VERIFY_NON_NULL(pdu->hdr, TAG, "pdu->hdr");
1244
1245     bool isReqMsg = false;
1246     uint32_t code = pdu->hdr->coap_hdr_udp_t.code;
1247     if (CA_GET == code || CA_POST == code || CA_PUT == code || CA_DELETE == code)
1248     {
1249         isReqMsg = true;
1250     }
1251
1252     // #1. check the block option type
1253     if (COAP_OPTION_BLOCK2 == blockType)
1254     {
1255         // #2. check the message type
1256         if (!isReqMsg)
1257         {
1258             if (block->szx > currData->block2.szx)
1259             {
1260                 OIC_LOG(DEBUG, TAG, "sze is big");
1261
1262                 // #3. calculate new block number from block size
1263                 unsigned int blockNum = BLOCK_SIZE(block->szx) /
1264                                         BLOCK_SIZE(currData->block2.szx) - 1;
1265                 OIC_LOG(DEBUG, TAG, "num is set as Negotiation");
1266                 block->num += blockNum;
1267                 block->szx = currData->block2.szx;
1268                 OIC_LOG_V(DEBUG, TAG, "updated block num: %d", block->num);
1269             }
1270         }
1271         else
1272         {
1273             if (block->szx > currData->block2.szx)
1274             {
1275                 OIC_LOG(DEBUG, TAG, "sze is big");
1276                 block->szx = currData->block2.szx;
1277             }
1278         }
1279     }
1280     else if (COAP_OPTION_BLOCK1 == blockType)
1281     {
1282         if (!isReqMsg)
1283         {
1284             if (block->szx < currData->block1.szx)
1285             {
1286                 OIC_LOG(DEBUG, TAG, "sze is small");
1287
1288                 unsigned int blockNum = BLOCK_SIZE(currData->block1.szx) /
1289                                         BLOCK_SIZE(block->szx) - 1;
1290                 block->num += blockNum;
1291                 OIC_LOG_V(DEBUG, TAG, "updated block num: %d", block->num);
1292             }
1293         }
1294         else
1295         {
1296             if (block->szx > currData->block1.szx)
1297             {
1298                 OIC_LOG(DEBUG, TAG, "sze is big");
1299                 block->szx = currData->block1.szx;
1300             }
1301         }
1302     }
1303     else
1304     {
1305         OIC_LOG(DEBUG, TAG, "Invalid block option");
1306         return CA_STATUS_FAILED;
1307     }
1308
1309     OIC_LOG(DEBUG, TAG, "OUT-NegotiateBlockSize");
1310
1311     return CA_STATUS_OK;
1312 }
1313
1314 CAResult_t CAUpdateBlockData(CABlockData_t *currData, coap_block_t block,
1315                              uint16_t blockType)
1316 {
1317     VERIFY_NON_NULL(currData, TAG, "currData");
1318
1319     // check if block size is bigger than CABlockSize_t
1320     if (block.szx > CA_BLOCK_SIZE_1024_BYTE)
1321     {
1322         OIC_LOG(DEBUG, TAG, "invalid block szx");
1323         return CA_STATUS_FAILED;
1324     }
1325
1326     // update block option
1327     if (COAP_OPTION_BLOCK2 == blockType)
1328     {
1329         currData->block2 = block;
1330     }
1331     else
1332     {
1333         currData->block1 = block;
1334     }
1335
1336     OIC_LOG(DEBUG, TAG, "data has updated");
1337     return CA_STATUS_OK;
1338 }
1339
1340 CAResult_t CAUpdateMessageId(coap_pdu_t *pdu, const CABlockDataID_t *blockID)
1341 {
1342     VERIFY_NON_NULL(pdu, TAG, "pdu");
1343     VERIFY_NON_NULL(pdu->hdr, TAG, "pdu->hdr");
1344     VERIFY_NON_NULL(blockID, TAG, "blockID");
1345
1346     // if message is sent, update messageId in block-wise transfer list
1347     CAData_t * cadata = CAGetDataSetFromBlockDataList(blockID);
1348     if (!cadata)
1349     {
1350         OIC_LOG(ERROR, TAG, "CAData is unavailable");
1351         return CA_STATUS_FAILED;
1352     }
1353
1354     if (cadata->requestInfo)
1355     {
1356         cadata->requestInfo->info.messageId = pdu->hdr->coap_hdr_udp_t.id;
1357     }
1358
1359     return CA_STATUS_OK;
1360 }
1361
1362 CAResult_t CAAddBlockOption(coap_pdu_t **pdu, const CAInfo_t *info,
1363                             const CAEndpoint_t *endpoint, coap_list_t **options)
1364 {
1365     OIC_LOG(DEBUG, TAG, "IN-AddBlockOption");
1366     VERIFY_NON_NULL(pdu, TAG, "pdu");
1367     VERIFY_NON_NULL((*pdu), TAG, "(*pdu)");
1368     VERIFY_NON_NULL((*pdu)->hdr, TAG, "(*pdu)->hdr");
1369     VERIFY_NON_NULL(info, TAG, "info");
1370     VERIFY_NON_NULL(endpoint, TAG, "endpoint");
1371     VERIFY_NON_NULL(options, TAG, "options");
1372
1373     CAResult_t res = CA_STATUS_OK;
1374     size_t dataLength = 0;
1375     if (info->payload)
1376     {
1377         dataLength = info->payloadSize;
1378         OIC_LOG_V(DEBUG, TAG, "dataLength - %zu", dataLength);
1379     }
1380
1381     CABlockDataID_t* blockDataID = CACreateBlockDatablockId(
1382             (CAToken_t)(*pdu)->hdr->coap_hdr_udp_t.token,
1383             (*pdu)->hdr->coap_hdr_udp_t.token_length,
1384             endpoint->port);
1385     if (NULL == blockDataID || blockDataID->idLength < 1)
1386     {
1387         OIC_LOG(ERROR, TAG, "blockId is null");
1388         res = CA_STATUS_FAILED;
1389         goto exit;
1390     }
1391
1392     uint32_t repCode = CA_RESPONSE_CODE((*pdu)->hdr->coap_hdr_udp_t.code);
1393     if (CA_REQUEST_ENTITY_INCOMPLETE == repCode)
1394     {
1395         OIC_LOG(INFO, TAG, "don't use option");
1396         res = CA_STATUS_OK;
1397         goto exit;
1398     }
1399
1400     uint8_t blockType = CAGetBlockOptionType(blockDataID);
1401     if (COAP_OPTION_BLOCK2 == blockType)
1402     {
1403         res = CAAddBlockOption2(pdu, info, dataLength, blockDataID, options);
1404         if (CA_STATUS_OK != res)
1405         {
1406             OIC_LOG(ERROR, TAG, "add has failed");
1407             goto exit;
1408         }
1409     }
1410     else if (COAP_OPTION_BLOCK1 == blockType)
1411     {
1412         res = CAAddBlockOption1(pdu, info, dataLength, blockDataID, options);
1413         if (CA_STATUS_OK != res)
1414         {
1415             OIC_LOG(ERROR, TAG, "add has failed");
1416             goto exit;
1417         }
1418     }
1419     else
1420     {
1421         OIC_LOG(DEBUG, TAG, "no BLOCK option");
1422
1423         // in case it is not large data, add option list to pdu.
1424         if (*options)
1425         {
1426             for (coap_list_t *opt = *options; opt; opt = opt->next)
1427             {
1428                 OIC_LOG_V(DEBUG, TAG, "[%s] opt will be added.",
1429                           COAP_OPTION_DATA(*(coap_option *) opt->data));
1430
1431                 OIC_LOG_V(DEBUG, TAG, "[%d] pdu length", (*pdu)->length);
1432                 coap_add_option(*pdu, COAP_OPTION_KEY(*(coap_option *) opt->data),
1433                                 COAP_OPTION_LENGTH(*(coap_option *) opt->data),
1434                                 COAP_OPTION_DATA(*(coap_option *) opt->data), coap_udp);
1435             }
1436         }
1437
1438         OIC_LOG_V(DEBUG, TAG, "[%d] pdu length after option", (*pdu)->length);
1439
1440         // if response data is so large. it have to send as block transfer
1441         if (!coap_add_data(*pdu, dataLength, (const unsigned char *) info->payload))
1442         {
1443             OIC_LOG(INFO, TAG, "it have to use block");
1444         }
1445         else
1446         {
1447             OIC_LOG(INFO, TAG, "not Blockwise Transfer");
1448         }
1449     }
1450
1451     uint32_t code = (*pdu)->hdr->coap_hdr_udp_t.code;
1452     if (CA_GET == code || CA_POST == code || CA_PUT == code || CA_DELETE == code)
1453     {
1454         // if received message type is RESET from remote device,
1455         // we have to use the updated message id of request message to find token.
1456         CABlockData_t *blockData = CAGetBlockDataFromBlockDataList(blockDataID);
1457         if (blockData)
1458         {
1459             res = CAUpdateMessageId(*pdu, blockDataID);
1460             if (CA_STATUS_OK != res)
1461             {
1462                 OIC_LOG(ERROR, TAG, "fail to update message id");
1463                 goto exit;
1464             }
1465         }
1466     }
1467
1468 exit:
1469     CADestroyBlockID(blockDataID);
1470     OIC_LOG(DEBUG, TAG, "OUT-AddBlockOption");
1471     return res;
1472 }
1473
1474 CAResult_t CAAddBlockOption2(coap_pdu_t **pdu, const CAInfo_t *info, size_t dataLength,
1475                              const CABlockDataID_t *blockID, coap_list_t **options)
1476 {
1477     OIC_LOG(DEBUG, TAG, "IN-AddBlockOption2");
1478     VERIFY_NON_NULL(pdu, TAG, "pdu");
1479     VERIFY_NON_NULL((*pdu), TAG, "(*pdu)");
1480     VERIFY_NON_NULL((*pdu)->hdr, TAG, "(*pdu)->hdr");
1481     VERIFY_NON_NULL(info, TAG, "info");
1482     VERIFY_NON_NULL(blockID, TAG, "blockID");
1483     VERIFY_NON_NULL(options, TAG, "options");
1484
1485     // get set block data from CABlock list-set.
1486     coap_block_t *block1 = CAGetBlockOption(blockID, COAP_OPTION_BLOCK1);
1487     coap_block_t *block2 = CAGetBlockOption(blockID, COAP_OPTION_BLOCK2);
1488     if (!block1 || !block2)
1489     {
1490         OIC_LOG(ERROR, TAG, "getting has failed");
1491         return CA_STATUS_FAILED;
1492     }
1493
1494     CAResult_t res = CA_STATUS_OK;
1495     uint32_t code = (*pdu)->hdr->coap_hdr_udp_t.code;
1496     if (CA_GET != code && CA_POST != code && CA_PUT != code && CA_DELETE != code)
1497     {
1498         CASetMoreBitFromBlock(dataLength, block2);
1499
1500         // if block number is 0, add size2 option
1501         if (0 == block2->num)
1502         {
1503             res = CAAddBlockSizeOption(*pdu, COAP_OPTION_SIZE2, dataLength, options);
1504             if (CA_STATUS_OK != res)
1505             {
1506                 OIC_LOG(ERROR, TAG, "add has failed");
1507                 goto exit;
1508             }
1509         }
1510
1511         res = CAAddBlockOptionImpl(block2, COAP_OPTION_BLOCK2, options);
1512         if (CA_STATUS_OK != res)
1513         {
1514             OIC_LOG(ERROR, TAG, "add has failed");
1515             goto exit;
1516         }
1517
1518         if (block1->num)
1519         {
1520             OIC_LOG(DEBUG, TAG, "combining block1 and block2");
1521             res = CAAddBlockOptionImpl(block1, COAP_OPTION_BLOCK1, options);
1522             if (CA_STATUS_OK != res)
1523             {
1524                 OIC_LOG(ERROR, TAG, "add has failed");
1525                 goto exit;
1526             }
1527             // initialize block number
1528             block1->num = 0;
1529         }
1530
1531         res = CAAddOptionToPDU(*pdu, options);
1532         if (CA_STATUS_OK != res)
1533         {
1534             OIC_LOG(ERROR, TAG, "add has failed");
1535             goto exit;
1536         }
1537
1538         if (!coap_add_block(*pdu, dataLength, (const unsigned char *) info->payload,
1539                             block2->num, block2->szx))
1540         {
1541             OIC_LOG(ERROR, TAG, "Data length is smaller than the start index");
1542             return CA_STATUS_FAILED;
1543         }
1544
1545         CALogBlockInfo(block2);
1546
1547         if (!block2->m)
1548         {
1549             // if sent message is last response block message, remove data
1550             CARemoveBlockDataFromList(blockID);
1551         }
1552     }
1553     else
1554     {
1555         OIC_LOG(DEBUG, TAG, "option2, not response msg");
1556         res = CAAddBlockOptionImpl(block2, COAP_OPTION_BLOCK2, options);
1557         if (CA_STATUS_OK != res)
1558         {
1559             OIC_LOG(ERROR, TAG, "add has failed");
1560             goto exit;
1561         }
1562
1563         res = CAAddOptionToPDU(*pdu, options);
1564         if (CA_STATUS_OK != res)
1565         {
1566             OIC_LOG(ERROR, TAG, "add has failed");
1567             goto exit;
1568         }
1569         CALogBlockInfo(block2);
1570     }
1571
1572     return CA_STATUS_OK;
1573
1574 exit:
1575     CARemoveBlockDataFromList(blockID);
1576     return res;
1577 }
1578
1579 CAResult_t CAAddBlockOption1(coap_pdu_t **pdu, const CAInfo_t *info, size_t dataLength,
1580                              const CABlockDataID_t *blockID, coap_list_t **options)
1581 {
1582     OIC_LOG(DEBUG, TAG, "IN-AddBlockOption1");
1583     VERIFY_NON_NULL(pdu, TAG, "pdu");
1584     VERIFY_NON_NULL((*pdu), TAG, "(*pdu)");
1585     VERIFY_NON_NULL((*pdu)->hdr, TAG, "(*pdu)->hdr");
1586     VERIFY_NON_NULL(info, TAG, "info");
1587     VERIFY_NON_NULL(blockID, TAG, "blockID");
1588     VERIFY_NON_NULL(options, TAG, "options");
1589
1590     // get set block data from CABlock list-set.
1591     coap_block_t *block1 = CAGetBlockOption(blockID, COAP_OPTION_BLOCK1);
1592     if (!block1)
1593     {
1594         OIC_LOG(ERROR, TAG, "getting has failed");
1595         return CA_STATUS_FAILED;
1596     }
1597
1598     CAResult_t res = CA_STATUS_OK;
1599     uint32_t code = (*pdu)->hdr->coap_hdr_udp_t.code;
1600     if (CA_GET == code || CA_POST == code || CA_PUT == code || CA_DELETE == code)
1601     {
1602         CASetMoreBitFromBlock(dataLength, block1);
1603
1604         // if block number is 0, add size1 option
1605         if (0 == block1->num)
1606         {
1607             res = CAAddBlockSizeOption(*pdu, COAP_OPTION_SIZE1, dataLength, options);
1608             if (CA_STATUS_OK != res)
1609             {
1610                 OIC_LOG(ERROR, TAG, "add has failed");
1611                 goto exit;
1612             }
1613         }
1614
1615         // add block option to option list.
1616         res = CAAddBlockOptionImpl(block1, COAP_OPTION_BLOCK1, options);
1617         if (CA_STATUS_OK != res)
1618         {
1619             OIC_LOG(ERROR, TAG, "add has failed");
1620             goto exit;
1621         }
1622
1623         // add option list to pdu.
1624         res = CAAddOptionToPDU(*pdu, options);
1625         if (CA_STATUS_OK != res)
1626         {
1627             OIC_LOG(ERROR, TAG, "add has failed");
1628             goto exit;
1629         }
1630
1631         // add the payload data as the block size.
1632         if (!coap_add_block(*pdu, dataLength, (const unsigned char *) info->payload, block1->num,
1633                             block1->szx))
1634         {
1635             OIC_LOG(ERROR, TAG, "Data length is smaller than the start index");
1636             return CA_STATUS_FAILED;
1637         }
1638     }
1639     else
1640     {
1641         OIC_LOG(DEBUG, TAG, "received response message with block option1");
1642
1643         // add block option to option list.
1644         res = CAAddBlockOptionImpl(block1, COAP_OPTION_BLOCK1, options);
1645         if (CA_STATUS_OK != res)
1646         {
1647             OIC_LOG(ERROR, TAG, "add has failed");
1648             goto exit;
1649         }
1650
1651         // add option list to pdu.
1652         res = CAAddOptionToPDU(*pdu, options);
1653         if (CA_STATUS_OK != res)
1654         {
1655             OIC_LOG(ERROR, TAG, "add has failed");
1656             goto exit;
1657         }
1658
1659         // add the payload data as the block size.
1660         if (!coap_add_data(*pdu, dataLength, (const unsigned char *) info->payload))
1661         {
1662             OIC_LOG(ERROR, TAG, "failed to add payload");
1663             return CA_STATUS_FAILED;
1664         }
1665
1666         // if it is last block message, remove block data from list.
1667         if (0 == block1->m)
1668         {
1669             // remove data from list
1670             res = CARemoveBlockDataFromList(blockID);
1671             if (CA_STATUS_OK != res)
1672             {
1673                 OIC_LOG(ERROR, TAG, "remove has failed");
1674                 return res;
1675             }
1676         }
1677     }
1678
1679     CALogBlockInfo(block1);
1680
1681     OIC_LOG(DEBUG, TAG, "OUT-AddBlockOption1");
1682
1683     return CA_STATUS_OK;
1684
1685 exit:
1686     CARemoveBlockDataFromList(blockID);
1687     return res;
1688 }
1689
1690 CAResult_t CAAddBlockOptionImpl(coap_block_t *block, uint8_t blockType,
1691                                 coap_list_t **options)
1692 {
1693     OIC_LOG(DEBUG, TAG, "IN-AddBlockOptionImpl");
1694     VERIFY_NON_NULL(block, TAG, "block");
1695     VERIFY_NON_NULL(options, TAG, "options");
1696
1697     unsigned char buf[BLOCKWISE_OPTION_BUFFER] = { 0 };
1698     unsigned int optionLength = coap_encode_var_bytes(buf,
1699                                                       ((block->num << BLOCK_NUMBER_IDX)
1700                                                        | (block->m << BLOCK_M_BIT_IDX)
1701                                                        | block->szx));
1702
1703     int ret = coap_insert(options,
1704                           CACreateNewOptionNode(blockType, optionLength, (char *) buf),
1705                           CAOrderOpts);
1706     if (ret <= 0)
1707     {
1708         return CA_STATUS_INVALID_PARAM;
1709     }
1710
1711     OIC_LOG(DEBUG, TAG, "OUT-AddBlockOptionImpl");
1712     return CA_STATUS_OK;
1713 }
1714
1715 CAResult_t CAAddOptionToPDU(coap_pdu_t *pdu, coap_list_t **options)
1716 {
1717     // after adding the block option to option list, add option list to pdu.
1718     if (*options)
1719     {
1720         for (coap_list_t *opt = *options; opt; opt = opt->next)
1721         {
1722             OIC_LOG_V(DEBUG, TAG, "[%s] opt will be added.",
1723                       COAP_OPTION_DATA(*(coap_option *) opt->data));
1724
1725             OIC_LOG_V(DEBUG, TAG, "[%d] pdu length", pdu->length);
1726             int ret = coap_add_option(pdu, COAP_OPTION_KEY(*(coap_option *) opt->data),
1727                                       COAP_OPTION_LENGTH(*(coap_option *) opt->data),
1728                                       COAP_OPTION_DATA(*(coap_option *) opt->data), coap_udp);
1729             if (!ret)
1730             {
1731                 return CA_STATUS_FAILED;
1732             }
1733         }
1734     }
1735
1736     OIC_LOG_V(DEBUG, TAG, "[%d] pdu length after option", pdu->length);
1737
1738     return CA_STATUS_OK;
1739 }
1740
1741 CAResult_t CAAddBlockSizeOption(coap_pdu_t *pdu, uint16_t sizeType, size_t dataLength,
1742                                 coap_list_t **options)
1743 {
1744     OIC_LOG(DEBUG, TAG, "IN-CAAddBlockSizeOption");
1745     VERIFY_NON_NULL(pdu, TAG, "pdu");
1746     VERIFY_NON_NULL(options, TAG, "options");
1747
1748     if (sizeType != COAP_OPTION_SIZE1 && sizeType != COAP_OPTION_SIZE2)
1749     {
1750         OIC_LOG(ERROR, TAG, "unknown option type");
1751         return CA_STATUS_FAILED;
1752     }
1753
1754     unsigned char value[BLOCKWISE_OPTION_BUFFER] = { 0 };
1755     unsigned int optionLength = coap_encode_var_bytes(value, dataLength);
1756
1757     int ret = coap_insert(options,
1758                           CACreateNewOptionNode(sizeType, optionLength, (char *) value),
1759                           CAOrderOpts);
1760     if (ret <= 0)
1761     {
1762         return CA_STATUS_INVALID_PARAM;
1763     }
1764
1765     OIC_LOG(DEBUG, TAG, "OUT-CAAddBlockSizeOption");
1766
1767     return CA_STATUS_OK;
1768 }
1769
1770 // TODO make pdu const after libcoap is updated to support that.
1771 bool CAIsPayloadLengthInPduWithBlockSizeOption(coap_pdu_t *pdu,
1772                                                uint16_t sizeType,
1773                                                size_t *totalPayloadLen)
1774 {
1775     OIC_LOG(DEBUG, TAG, "IN-CAIsPayloadLengthInPduWithBlockSizeOption");
1776     VERIFY_NON_NULL(pdu, TAG, "pdu");
1777     VERIFY_NON_NULL(totalPayloadLen, TAG, "totalPayloadLen");
1778
1779     if (sizeType != COAP_OPTION_SIZE1 && sizeType != COAP_OPTION_SIZE2)
1780     {
1781         OIC_LOG(ERROR, TAG, "unknown option type");
1782         return CA_STATUS_FAILED;
1783     }
1784
1785     coap_opt_iterator_t opt_iter;
1786     coap_opt_t *option = coap_check_option(pdu, sizeType, &opt_iter);
1787     if (option)
1788     {
1789         OIC_LOG(DEBUG, TAG, "get size option from pdu");
1790         *totalPayloadLen = coap_decode_var_bytes(COAP_OPT_VALUE(option),
1791                                                  COAP_OPT_LENGTH(option));
1792
1793         OIC_LOG_V(DEBUG, TAG, "the total payload length to be received is [%zu]bytes",
1794                   *totalPayloadLen);
1795
1796         return true;
1797     }
1798
1799     OIC_LOG(DEBUG, TAG, "OUT-CAIsPayloadLengthInPduWithBlockSizeOption");
1800
1801     return false;
1802 }
1803
1804 uint8_t CACheckBlockErrorType(CABlockData_t *currData, coap_block_t *receivedBlock,
1805                               const CAData_t *receivedData, uint16_t blockType,
1806                               size_t dataLen)
1807 {
1808     OIC_LOG(DEBUG, TAG, "IN-CheckBlockError");
1809
1810     VERIFY_NON_NULL(currData, TAG, "currData is NULL");
1811     VERIFY_NON_NULL(receivedBlock, TAG, "receivedBlock is NULL");
1812     VERIFY_NON_NULL(receivedData, TAG, "receivedData is NULL");
1813
1814     // #1. check the received payload length
1815     size_t blockPayloadLen = 0;
1816     CAGetPayloadInfo(receivedData, &blockPayloadLen);
1817
1818     // #2. check if the block sequence is right
1819     if (COAP_OPTION_BLOCK1 == blockType)
1820     {
1821         size_t prePayloadLen = currData->receivedPayloadLen;
1822         if (prePayloadLen != (size_t) BLOCK_SIZE(receivedBlock->szx) * receivedBlock->num)
1823         {
1824             if (receivedBlock->num > currData->block1.num + 1)
1825             {
1826                 // 408 Error handling of block loss
1827                 OIC_LOG(ERROR, TAG, "option1: error 4.08");
1828                 OIC_LOG(ERROR, TAG, "it didn't order");
1829                 return CA_BLOCK_INCOMPLETE;
1830             }
1831             return CA_BLOCK_RECEIVED_ALREADY;
1832         }
1833     }
1834     else if (COAP_OPTION_BLOCK2 == blockType)
1835     {
1836         if (receivedBlock->num != currData->block2.num)
1837         {
1838             if (receivedBlock->num > currData->block2.num)
1839             {
1840                 // 408 Error handling of block loss
1841                 OIC_LOG(ERROR, TAG, "option2: error 4.08");
1842                 OIC_LOG(ERROR, TAG, "it didn't order");
1843                 return CA_BLOCK_INCOMPLETE;
1844             }
1845             return CA_BLOCK_RECEIVED_ALREADY;
1846         }
1847     }
1848
1849     // #3. check if error check logic is required
1850     size_t optionLen = dataLen - blockPayloadLen;
1851     if (receivedBlock->m && blockPayloadLen != (size_t) BLOCK_SIZE(receivedBlock->szx))
1852     {
1853         // 413 Error handling of too large entity
1854         if (COAP_MAX_PDU_SIZE < BLOCK_SIZE(receivedBlock->szx) + optionLen)
1855         {
1856             // buffer size is smaller than received block size
1857             OIC_LOG(ERROR, TAG, "error type 4.13");
1858             OIC_LOG(ERROR, TAG, "too large size");
1859
1860             // set the block size to be smaller than COAP_MAX_PDU_SIZE
1861             for (int32_t size = CA_DEFAULT_BLOCK_SIZE; size >= 0; size--)
1862             {
1863                 if (COAP_MAX_PDU_SIZE >= BLOCK_SIZE(size) + optionLen)
1864                 {
1865                     OIC_LOG_V(ERROR, TAG, "replace sze with %d", size);
1866                     currData->block2.szx = size;
1867                     currData->block1.szx = size;
1868                     break;
1869                 }
1870             }
1871             return CA_BLOCK_TOO_LARGE;
1872         }
1873         else
1874         {
1875             // 408 Error handling of payload loss
1876             OIC_LOG(ERROR, TAG, "error type 4.08");
1877             OIC_LOG(ERROR, TAG, "payload len != block sze");
1878             return CA_BLOCK_INCOMPLETE;
1879         }
1880     }
1881     else if (0 == receivedBlock->m && 0 != currData->payloadLength)
1882     {
1883         // if the received block is last block, check the total payload length
1884         size_t receivedPayloadLen = currData->receivedPayloadLen;
1885         receivedPayloadLen += blockPayloadLen;
1886
1887         if (receivedPayloadLen != currData->payloadLength)
1888         {
1889             OIC_LOG(ERROR, TAG, "error type 4.08");
1890             OIC_LOG(ERROR, TAG, "total payload length is wrong");
1891             return CA_BLOCK_INCOMPLETE;
1892         }
1893     }
1894
1895     OIC_LOG(DEBUG, TAG, "received all data normally");
1896
1897     OIC_LOG(DEBUG, TAG, "OUT-CheckBlockError");
1898
1899     return CA_BLOCK_UNKNOWN;
1900 }
1901
1902 CAResult_t CAUpdatePayloadData(CABlockData_t *currData, const CAData_t *receivedData,
1903                                uint8_t status, bool isSizeOption, uint16_t blockType)
1904 {
1905     OIC_LOG(DEBUG, TAG, "IN-UpdatePayloadData");
1906
1907     VERIFY_NON_NULL(currData, TAG, "currData");
1908     VERIFY_NON_NULL(receivedData, TAG, "receivedData");
1909
1910     // if error code is 4.08, do not update payload
1911     if (CA_BLOCK_INCOMPLETE == status)
1912     {
1913         OIC_LOG(ERROR, TAG, "no require to update");
1914         return CA_STATUS_OK;
1915     }
1916
1917     size_t blockPayloadLen = 0;
1918     CAPayload_t blockPayload = CAGetPayloadInfo(receivedData, &blockPayloadLen);
1919
1920     if (CA_BLOCK_TOO_LARGE == status)
1921     {
1922         blockPayloadLen = (COAP_OPTION_BLOCK2 == blockType) ?
1923                 BLOCK_SIZE(currData->block2.szx) : BLOCK_SIZE(currData->block1.szx);
1924     }
1925
1926     // memory allocation for the received block payload
1927     size_t prePayloadLen = currData->receivedPayloadLen;
1928     if (blockPayload)
1929     {
1930         if (currData->payloadLength)
1931         {
1932             // in case the block message has the size option
1933             // allocate the memory for the total payload
1934             if (isSizeOption)
1935             {
1936                 CAPayload_t prePayload = currData->payload;
1937
1938                 OIC_LOG(DEBUG, TAG, "allocate memory for the total payload");
1939                 currData->payload = (CAPayload_t) OICCalloc(1, currData->payloadLength);
1940                 if (NULL == currData->payload)
1941                 {
1942                     OIC_LOG(ERROR, TAG, "out of memory");
1943                     return CA_MEMORY_ALLOC_FAILED;
1944                 }
1945                 memcpy(currData->payload, prePayload, prePayloadLen);
1946                 OICFree(prePayload);
1947             }
1948
1949             // update the total payload
1950             memcpy(currData->payload + prePayloadLen, blockPayload, blockPayloadLen);
1951         }
1952         else
1953         {
1954             OIC_LOG(DEBUG, TAG, "allocate memory for the received block payload");
1955
1956             size_t totalPayloadLen = prePayloadLen + blockPayloadLen;
1957             CAPayload_t newPayload = OICRealloc(currData->payload, totalPayloadLen);
1958             if (NULL == newPayload)
1959             {
1960                 OIC_LOG(ERROR, TAG, "out of memory");
1961                 return CA_MEMORY_ALLOC_FAILED;
1962             }
1963
1964             // update the total payload
1965             memset(newPayload + prePayloadLen, 0, blockPayloadLen);
1966             currData->payload = newPayload;
1967             memcpy(currData->payload + prePayloadLen, blockPayload, blockPayloadLen);
1968         }
1969
1970         // update received payload length
1971         currData->receivedPayloadLen += blockPayloadLen;
1972
1973         OIC_LOG_V(DEBUG, TAG, "updated payload: %s, len: %zu", currData->payload,
1974                   currData->receivedPayloadLen);
1975     }
1976
1977     OIC_LOG(DEBUG, TAG, "OUT-UpdatePayloadData");
1978     return CA_STATUS_OK;
1979 }
1980
1981 CAData_t* CACreateNewDataSet(const coap_pdu_t *pdu, const CAEndpoint_t *endpoint)
1982 {
1983     VERIFY_NON_NULL_RET(pdu, TAG, "pdu", NULL);
1984     VERIFY_NON_NULL_RET(pdu->hdr, TAG, "pdu->hdr", NULL);
1985     VERIFY_NON_NULL_RET(endpoint, TAG, "endpoint", NULL);
1986
1987     CARequestInfo_t* requestInfo = NULL;
1988     CAResponseInfo_t* responseInfo = NULL;
1989
1990     uint32_t code = pdu->hdr->coap_hdr_udp_t.code;
1991     if (CA_GET == code || CA_POST == code || CA_PUT == code || CA_DELETE == code)
1992     {
1993         CAInfo_t responseData = { .tokenLength = pdu->hdr->coap_hdr_udp_t.token_length };
1994         responseData.token = (CAToken_t) OICMalloc(responseData.tokenLength);
1995         if (!responseData.token)
1996         {
1997             OIC_LOG(ERROR, TAG, "out of memory");
1998             return NULL;
1999         }
2000         memcpy(responseData.token, pdu->hdr->coap_hdr_udp_t.token, responseData.tokenLength);
2001
2002         responseInfo = (CAResponseInfo_t*) OICCalloc(1, sizeof(CAResponseInfo_t));
2003         if (!responseInfo)
2004         {
2005             OIC_LOG(ERROR, TAG, "out of memory");
2006             OICFree(responseData.token);
2007             return NULL;
2008         }
2009         responseInfo->info = responseData;
2010     }
2011     else
2012     {
2013         CAInfo_t requestData = { .tokenLength = pdu->hdr->coap_hdr_udp_t.token_length };
2014         requestData.token = (CAToken_t) OICMalloc(requestData.tokenLength);
2015         if (!requestData.token)
2016         {
2017             OIC_LOG(ERROR, TAG, "out of memory");
2018             return NULL;
2019         }
2020         memcpy(requestData.token, pdu->hdr->coap_hdr_udp_t.token, requestData.tokenLength);
2021
2022         requestInfo = (CARequestInfo_t*) OICCalloc(1, sizeof(CARequestInfo_t));
2023         if (!requestInfo)
2024         {
2025             OIC_LOG(ERROR, TAG, "out of memory");
2026             OICFree(requestData.token);
2027             return NULL;
2028         }
2029         requestInfo->info = requestData;
2030
2031         // get resource uri information from received response message
2032         // to send next request message to remote device
2033         CAResponseInfo_t* resInfo = (CAResponseInfo_t*)OICCalloc(1, sizeof(*resInfo));
2034         if (!resInfo)
2035         {
2036             OIC_LOG(ERROR, TAG, "memory allocation failed");
2037             OICFree(requestData.token);
2038             return NULL;
2039         }
2040
2041         CAGetResponseInfoFromPDU(pdu, resInfo, endpoint);
2042         requestInfo->method = CA_GET;
2043         requestInfo->info.resourceUri = OICStrdup(resInfo->info.resourceUri);
2044
2045         // after copying the resource uri, destroy response info.
2046         CADestroyResponseInfoInternal(resInfo);
2047     }
2048
2049     CAData_t *data = (CAData_t *) OICCalloc(1, sizeof(CAData_t));
2050     if (!data)
2051     {
2052         OIC_LOG(ERROR, TAG, "out of memory");
2053         OICFree(requestInfo);
2054         OICFree(responseInfo);
2055         return NULL;
2056     }
2057
2058     data->requestInfo = requestInfo;
2059     data->responseInfo = responseInfo;
2060     data->remoteEndpoint = CACloneEndpoint(endpoint);
2061     data->type = SEND_TYPE_UNICAST;
2062
2063     return data;
2064 }
2065
2066 CAData_t *CACloneCAData(const CAData_t *data)
2067 {
2068     VERIFY_NON_NULL_RET(data, TAG, "data", NULL);
2069
2070     CAData_t *clone = (CAData_t *) OICCalloc(1, sizeof(CAData_t));
2071     if (!clone)
2072     {
2073         OIC_LOG(ERROR, TAG, "out of memory");
2074         return NULL;
2075     }
2076     *clone = *data;
2077
2078     if (data->requestInfo)
2079     {
2080         clone->requestInfo = CACloneRequestInfo(data->requestInfo);
2081     }
2082     else if (data->responseInfo)
2083     {
2084         clone->responseInfo = CACloneResponseInfo(data->responseInfo);
2085     }
2086
2087     if (data->remoteEndpoint)
2088     {
2089         clone->remoteEndpoint = CACloneEndpoint(data->remoteEndpoint);
2090     }
2091
2092     return clone;
2093 }
2094
2095 CAResult_t CAUpdatePayloadToCAData(CAData_t *data, const CAPayload_t payload,
2096                                    size_t payloadLen)
2097 {
2098     OIC_LOG(DEBUG, TAG, "IN-UpdatePayload");
2099
2100     VERIFY_NON_NULL(data, TAG, "data is NULL");
2101     VERIFY_NON_NULL(payload, TAG, "payload is NULL");
2102
2103     CAPayload_t newPayload = NULL;
2104     switch (data->dataType)
2105     {
2106         case CA_REQUEST_DATA:
2107             if (!data->requestInfo)
2108             {
2109                 OIC_LOG(ERROR, TAG, "request info is null");
2110                 return CA_STATUS_FAILED;
2111             }
2112             // allocate payload field
2113             newPayload = OICRealloc(data->requestInfo->info.payload, payloadLen);
2114             if (!newPayload)
2115             {
2116                 OIC_LOG(ERROR, TAG, "out of memory");
2117                 return CA_STATUS_FAILED;
2118             }
2119             data->requestInfo->info.payload = newPayload;
2120             memcpy(data->requestInfo->info.payload, payload, payloadLen);
2121             data->requestInfo->info.payloadSize = payloadLen;
2122             break;
2123
2124         case CA_RESPONSE_DATA:
2125             if (!data->responseInfo)
2126             {
2127                 OIC_LOG(ERROR, TAG, "response info is null");
2128                 return CA_STATUS_FAILED;
2129             }
2130             // allocate payload field
2131             newPayload = OICRealloc(data->responseInfo->info.payload, payloadLen);
2132             if (!newPayload)
2133             {
2134                 OIC_LOG(ERROR, TAG, "out of memory");
2135                 return CA_STATUS_FAILED;
2136             }
2137             data->responseInfo->info.payload = newPayload;
2138             memcpy(data->responseInfo->info.payload, payload, payloadLen);
2139             data->responseInfo->info.payloadSize = payloadLen;
2140             break;
2141
2142         default:
2143             // does not occur case
2144             OIC_LOG(ERROR, TAG, "not supported data type");
2145             return CA_NOT_SUPPORTED;
2146     }
2147
2148     OIC_LOG(DEBUG, TAG, "OUT-UpdatePayload");
2149
2150     return CA_STATUS_OK;
2151 }
2152
2153 CAPayload_t CAGetPayloadInfo(const CAData_t *data, size_t *payloadLen)
2154 {
2155     VERIFY_NON_NULL_RET(data, TAG, "data", NULL);
2156     VERIFY_NON_NULL_RET(payloadLen, TAG, "payloadLen", NULL);
2157
2158     if (data->requestInfo)
2159     {
2160         if (data->requestInfo->info.payload)
2161         {
2162             *payloadLen = data->requestInfo->info.payloadSize;
2163             return data->requestInfo->info.payload;
2164         }
2165     }
2166     else
2167     {
2168         if (data->responseInfo->info.payload)
2169         {
2170             *payloadLen = data->responseInfo->info.payloadSize;
2171             return data->responseInfo->info.payload;
2172         }
2173     }
2174
2175     return NULL;
2176 }
2177
2178 CAResult_t CAHandleBlockErrorResponse(coap_block_t *block, uint16_t blockType,
2179                                       uint32_t responseResult)
2180 {
2181     OIC_LOG(DEBUG, TAG, "IN-HandleBlockErrorRes");
2182     VERIFY_NON_NULL(block, TAG, "block is NULL");
2183
2184     // update block data
2185     switch (responseResult)
2186     {
2187         case CA_REQUEST_ENTITY_INCOMPLETE:
2188             block->num = 0;
2189             break;
2190         case CA_REQUEST_ENTITY_TOO_LARGE:
2191             if (COAP_OPTION_BLOCK1 == blockType)
2192             {
2193                 block->num++;
2194             }
2195             block->m = 0;
2196             break;
2197         default:
2198             OIC_LOG_V(ERROR, TAG, "there is no Error Code of BWT[%d]", responseResult);
2199             return CA_STATUS_FAILED;
2200     }
2201
2202     OIC_LOG(DEBUG, TAG, "OUT-HandleBlockErrorRes");
2203     return CA_STATUS_OK;
2204 }
2205
2206 CAResult_t CAUpdateBlockOptionType(const CABlockDataID_t *blockID,
2207                                    uint8_t blockType)
2208 {
2209     OIC_LOG(DEBUG, TAG, "IN-UpdateBlockOptionType");
2210     VERIFY_NON_NULL(blockID, TAG, "blockID");
2211
2212     ca_mutex_lock(g_context.blockDataListMutex);
2213
2214     size_t len = u_arraylist_length(g_context.dataList);
2215     for (size_t i = 0; i < len; i++)
2216     {
2217         CABlockData_t *currData = (CABlockData_t *) u_arraylist_get(g_context.dataList, i);
2218         if (CABlockidMatches(currData, blockID))
2219         {
2220             currData->type = blockType;
2221             ca_mutex_unlock(g_context.blockDataListMutex);
2222             OIC_LOG(DEBUG, TAG, "OUT-UpdateBlockOptionType");
2223             return CA_STATUS_OK;
2224         }
2225     }
2226     ca_mutex_unlock(g_context.blockDataListMutex);
2227
2228     OIC_LOG(DEBUG, TAG, "OUT-UpdateBlockOptionType");
2229     return CA_STATUS_FAILED;
2230 }
2231
2232 uint8_t CAGetBlockOptionType(const CABlockDataID_t *blockID)
2233 {
2234     OIC_LOG(DEBUG, TAG, "IN-GetBlockOptionType");
2235     VERIFY_NON_NULL_RET(blockID, TAG, "blockID", 0);
2236
2237     ca_mutex_lock(g_context.blockDataListMutex);
2238
2239     size_t len = u_arraylist_length(g_context.dataList);
2240     for (size_t i = 0; i < len; i++)
2241     {
2242         CABlockData_t *currData = (CABlockData_t *) u_arraylist_get(g_context.dataList, i);
2243         if (CABlockidMatches(currData, blockID))
2244         {
2245             ca_mutex_unlock(g_context.blockDataListMutex);
2246             OIC_LOG(DEBUG, TAG, "OUT-GetBlockOptionType");
2247             return currData->type;
2248         }
2249     }
2250     ca_mutex_unlock(g_context.blockDataListMutex);
2251
2252     OIC_LOG(DEBUG, TAG, "OUT-GetBlockOptionType");
2253     return 0;
2254 }
2255
2256 CAData_t *CAGetDataSetFromBlockDataList(const CABlockDataID_t *blockID)
2257 {
2258     VERIFY_NON_NULL_RET(blockID, TAG, "blockID", NULL);
2259
2260     ca_mutex_lock(g_context.blockDataListMutex);
2261
2262     size_t len = u_arraylist_length(g_context.dataList);
2263     for (size_t i = 0; i < len; i++)
2264     {
2265         CABlockData_t *currData = (CABlockData_t *) u_arraylist_get(g_context.dataList, i);
2266         if (CABlockidMatches(currData, blockID))
2267         {
2268             ca_mutex_unlock(g_context.blockDataListMutex);
2269             return currData->sentData;
2270         }
2271     }
2272     ca_mutex_unlock(g_context.blockDataListMutex);
2273
2274     return NULL;
2275 }
2276
2277 CAResult_t CAGetTokenFromBlockDataList(const coap_pdu_t *pdu, const CAEndpoint_t *endpoint,
2278                                        CAResponseInfo_t *responseInfo)
2279 {
2280     OIC_LOG(DEBUG, TAG, "IN-CAGetTokenFromBlockDataList");
2281     VERIFY_NON_NULL(pdu, TAG, "pdu");
2282     VERIFY_NON_NULL(endpoint, TAG, "endpoint");
2283     VERIFY_NON_NULL(responseInfo, TAG, "responseInfo");
2284
2285     ca_mutex_lock(g_context.blockDataListMutex);
2286
2287     size_t len = u_arraylist_length(g_context.dataList);
2288     for (size_t i = 0; i < len; i++)
2289     {
2290         CABlockData_t *currData = (CABlockData_t *) u_arraylist_get(g_context.dataList, i);
2291         if (NULL == currData)
2292         {
2293             continue;
2294         }
2295
2296         if (NULL != currData->sentData && NULL != currData->sentData->requestInfo)
2297         {
2298             if (pdu->hdr->coap_hdr_udp_t.id == currData->sentData->requestInfo->info.messageId &&
2299                     endpoint->adapter == currData->sentData->remoteEndpoint->adapter)
2300             {
2301                 if (NULL != currData->sentData->requestInfo->info.token)
2302                 {
2303                     uint8_t length = currData->sentData->requestInfo->info.tokenLength;
2304                     responseInfo->info.tokenLength = length;
2305                     responseInfo->info.token = (char *) OICMalloc(length);
2306                     if (NULL == responseInfo->info.token)
2307                     {
2308                         OIC_LOG(ERROR, TAG, "out of memory");
2309                         ca_mutex_unlock(g_context.blockDataListMutex);
2310                         return CA_MEMORY_ALLOC_FAILED;
2311                     }
2312                     memcpy(responseInfo->info.token, currData->sentData->requestInfo->info.token,
2313                            responseInfo->info.tokenLength);
2314
2315                     ca_mutex_unlock(g_context.blockDataListMutex);
2316                     OIC_LOG(DEBUG, TAG, "OUT-CAGetTokenFromBlockDataList");
2317                     return CA_STATUS_OK;
2318                 }
2319             }
2320         }
2321     }
2322
2323     ca_mutex_unlock(g_context.blockDataListMutex);
2324
2325     OIC_LOG(DEBUG, TAG, "OUT-CAGetTokenFromBlockDataList");
2326     return CA_STATUS_FAILED;
2327 }
2328
2329 CAResult_t CACheckBlockDataValidation(const CAData_t *sendData, CABlockData_t **blockData)
2330 {
2331     VERIFY_NON_NULL(sendData, TAG, "sendData");
2332     VERIFY_NON_NULL(blockData, TAG, "blockData");
2333
2334     CABlockDataID_t* blockDataID;
2335     if(sendData->requestInfo)
2336     {
2337         blockDataID = CACreateBlockDatablockId(
2338                             (CAToken_t)sendData->requestInfo->info.token,
2339                             sendData->requestInfo->info.tokenLength,
2340                             sendData->remoteEndpoint->port);
2341     }
2342     else if(sendData->responseInfo)
2343     {
2344         blockDataID = CACreateBlockDatablockId(
2345                             (CAToken_t)sendData->responseInfo->info.token,
2346                             sendData->responseInfo->info.tokenLength,
2347                             sendData->remoteEndpoint->port);
2348     }
2349     else
2350     {
2351         OIC_LOG(ERROR, TAG, "sendData doesn't have requestInfo or responseInfo");
2352         return CA_STATUS_FAILED;
2353     }
2354
2355     if (NULL == blockDataID || blockDataID->idLength < 1)
2356     {
2357         OIC_LOG(ERROR, TAG, "blockId is null");
2358         CADestroyBlockID(blockDataID);
2359         return CA_STATUS_FAILED;
2360     }
2361
2362     ca_mutex_lock(g_context.blockDataListMutex);
2363
2364     size_t len = u_arraylist_length(g_context.dataList);
2365     for (size_t i = 0; i < len; i++)
2366     {
2367         CABlockData_t *currData = (CABlockData_t *) u_arraylist_get(g_context.dataList, i);
2368         if (!currData)
2369         {
2370             continue;
2371         }
2372
2373         if (sendData->requestInfo) // sendData is requestMessage
2374         {
2375             OIC_LOG(DEBUG, TAG, "Send request");
2376             if (NULL != currData->blockDataId
2377                     && NULL != currData->blockDataId->id
2378                     && currData->blockDataId->idLength > 0
2379                     && NULL != sendData->requestInfo->info.token)
2380             {
2381                 if (CABlockidMatches(currData, blockDataID))
2382                 {
2383                     OIC_LOG(ERROR, TAG, "already sent");
2384                     continue;
2385                 }
2386             }
2387         }
2388         else if (sendData->responseInfo) // sendData is responseMessage
2389         {
2390             OIC_LOG(DEBUG, TAG, "Send response");
2391             if (NULL != currData->blockDataId
2392                     && NULL != currData->blockDataId->id
2393                     && currData->blockDataId->idLength > 0
2394                     && NULL != sendData->responseInfo->info.token)
2395             {
2396                 if (CABlockidMatches(currData, blockDataID))
2397                 {
2398                     // set sendData
2399                     if (NULL != currData->sentData)
2400                     {
2401                         OIC_LOG(DEBUG, TAG, "init block number");
2402                         CADestroyDataSet(currData->sentData);
2403                     }
2404                     currData->sentData = CACloneCAData(sendData);
2405                     *blockData = currData;
2406                     ca_mutex_unlock(g_context.blockDataListMutex);
2407                     CADestroyBlockID(blockDataID);
2408                     return CA_STATUS_OK;
2409                 }
2410             }
2411         }
2412         else
2413         {
2414             OIC_LOG(ERROR, TAG, "no CAInfo data");
2415             continue;
2416         }
2417     }
2418     ca_mutex_unlock(g_context.blockDataListMutex);
2419
2420     CADestroyBlockID(blockDataID);
2421
2422     return CA_STATUS_FAILED;
2423 }
2424
2425 CABlockData_t *CAGetBlockDataFromBlockDataList(const CABlockDataID_t *blockID)
2426 {
2427     VERIFY_NON_NULL_RET(blockID, TAG, "blockID", NULL);
2428
2429     ca_mutex_lock(g_context.blockDataListMutex);
2430
2431     size_t len = u_arraylist_length(g_context.dataList);
2432     for (size_t i = 0; i < len; i++)
2433     {
2434         CABlockData_t *currData = (CABlockData_t *) u_arraylist_get(g_context.dataList, i);
2435         if (CABlockidMatches(currData, blockID))
2436         {
2437             ca_mutex_unlock(g_context.blockDataListMutex);
2438             return currData;
2439         }
2440     }
2441     ca_mutex_unlock(g_context.blockDataListMutex);
2442
2443     return NULL;
2444 }
2445
2446 coap_block_t *CAGetBlockOption(const CABlockDataID_t *blockID, uint16_t blockType)
2447 {
2448     OIC_LOG(DEBUG, TAG, "IN-GetBlockOption");
2449     VERIFY_NON_NULL_RET(blockID, TAG, "blockID", NULL);
2450
2451     ca_mutex_lock(g_context.blockDataListMutex);
2452
2453     size_t len = u_arraylist_length(g_context.dataList);
2454     for (size_t i = 0; i < len; i++)
2455     {
2456         CABlockData_t *currData = (CABlockData_t *) u_arraylist_get(g_context.dataList, i);
2457         if (CABlockidMatches(currData, blockID))
2458         {
2459             ca_mutex_unlock(g_context.blockDataListMutex);
2460             OIC_LOG(DEBUG, TAG, "OUT-GetBlockOption");
2461             if (COAP_OPTION_BLOCK2 == blockType)
2462             {
2463                 return &currData->block2;
2464             }
2465             else if (COAP_OPTION_BLOCK1 == blockType)
2466             {
2467                 return &currData->block1;
2468             }
2469         }
2470     }
2471     ca_mutex_unlock(g_context.blockDataListMutex);
2472
2473     OIC_LOG(DEBUG, TAG, "OUT-GetBlockOption");
2474     return NULL;
2475 }
2476
2477 CAPayload_t CAGetPayloadFromBlockDataList(const CABlockDataID_t *blockID,
2478                                           size_t *fullPayloadLen)
2479 {
2480     OIC_LOG(DEBUG, TAG, "IN-GetFullPayload");
2481     VERIFY_NON_NULL_RET(blockID, TAG, "blockID", NULL);
2482     VERIFY_NON_NULL_RET(fullPayloadLen, TAG, "fullPayloadLen", NULL);
2483
2484     ca_mutex_lock(g_context.blockDataListMutex);
2485
2486     size_t len = u_arraylist_length(g_context.dataList);
2487     for (size_t i = 0; i < len; i++)
2488     {
2489         CABlockData_t *currData = (CABlockData_t *) u_arraylist_get(g_context.dataList, i);
2490         if (CABlockidMatches(currData, blockID))
2491         {
2492             ca_mutex_unlock(g_context.blockDataListMutex);
2493             *fullPayloadLen = currData->receivedPayloadLen;
2494             OIC_LOG(DEBUG, TAG, "OUT-GetFullPayload");
2495             return currData->payload;
2496         }
2497     }
2498     ca_mutex_unlock(g_context.blockDataListMutex);
2499
2500     OIC_LOG(DEBUG, TAG, "OUT-GetFullPayload");
2501     return NULL;
2502 }
2503
2504 CABlockData_t *CACreateNewBlockData(const CAData_t *sendData)
2505 {
2506     OIC_LOG(DEBUG, TAG, "IN-CACreateNewBlockData");
2507     VERIFY_NON_NULL_RET(sendData, TAG, "sendData", NULL);
2508
2509     // create block data
2510     CABlockData_t *data = (CABlockData_t *) OICCalloc(1, sizeof(CABlockData_t));
2511     if (!data)
2512     {
2513         OIC_LOG(ERROR, TAG, "memory alloc has failed");
2514         return NULL;
2515     }
2516
2517     data->block1.szx = CA_DEFAULT_BLOCK_SIZE;
2518     data->block2.szx = CA_DEFAULT_BLOCK_SIZE;
2519     data->sentData = CACloneCAData(sendData);
2520     if (!data->sentData)
2521     {
2522         OIC_LOG(ERROR, TAG, PCF("memory alloc has failed"));
2523         OICFree(data);
2524         return NULL;
2525     }
2526
2527     CAToken_t token = NULL;
2528     uint8_t tokenLength = 0;
2529     if (data->sentData->requestInfo)
2530     {
2531         // update token info
2532         tokenLength = data->sentData->requestInfo->info.tokenLength;
2533         token = data->sentData->requestInfo->info.token;
2534     }
2535     else if (data->sentData->responseInfo)
2536     {
2537         tokenLength = data->sentData->responseInfo->info.tokenLength;
2538         token = data->sentData->responseInfo->info.token;
2539     }
2540
2541     if (!data->sentData->remoteEndpoint)
2542     {
2543         OIC_LOG(ERROR, TAG, "remoteEndpoint is null");
2544         CADestroyDataSet(data->sentData);
2545         OICFree(data);
2546         return NULL;
2547     }
2548
2549     CABlockDataID_t* blockDataID = CACreateBlockDatablockId(token, tokenLength,
2550                                                             data->sentData->remoteEndpoint->port);
2551     if (NULL == blockDataID || blockDataID->idLength < 1)
2552     {
2553         OIC_LOG(ERROR, TAG, "blockId is null");
2554         CADestroyBlockID(blockDataID);
2555         CADestroyDataSet(data->sentData);
2556         OICFree(data);
2557         return NULL;
2558     }
2559     data->blockDataId = blockDataID;
2560
2561     ca_mutex_lock(g_context.blockDataListMutex);
2562
2563     bool res = u_arraylist_add(g_context.dataList, (void *) data);
2564     if (!res)
2565     {
2566         OIC_LOG(ERROR, TAG, "add has failed");
2567         CADestroyBlockID(data->blockDataId);
2568         CADestroyDataSet(data->sentData);
2569         OICFree(data);
2570         ca_mutex_unlock(g_context.blockDataListMutex);
2571         return NULL;
2572     }
2573     ca_mutex_unlock(g_context.blockDataListMutex);
2574
2575     OIC_LOG(DEBUG, TAG, "OUT-CreateBlockData");
2576     return data;
2577 }
2578
2579 CAResult_t CARemoveBlockDataFromList(const CABlockDataID_t *blockID)
2580 {
2581     OIC_LOG(DEBUG, TAG, "CARemoveBlockData");
2582     VERIFY_NON_NULL(blockID, TAG, "blockID");
2583
2584     ca_mutex_lock(g_context.blockDataListMutex);
2585
2586     size_t len = u_arraylist_length(g_context.dataList);
2587     for (size_t i = 0; i < len; i++)
2588     {
2589         CABlockData_t *currData = (CABlockData_t *) u_arraylist_get(g_context.dataList, i);
2590         if (CABlockidMatches(currData, blockID))
2591         {
2592             CABlockData_t *removedData = u_arraylist_remove(g_context.dataList, i);
2593             if (!removedData)
2594             {
2595                 OIC_LOG(ERROR, TAG, "data is NULL");
2596                 ca_mutex_unlock(g_context.blockDataListMutex);
2597                 return CA_STATUS_FAILED;
2598             }
2599
2600             // destroy memory
2601             CADestroyDataSet(currData->sentData);
2602             CADestroyBlockID(currData->blockDataId);
2603             OICFree(currData->payload);
2604             OICFree(currData);
2605             ca_mutex_unlock(g_context.blockDataListMutex);
2606             return CA_STATUS_OK;
2607         }
2608     }
2609     ca_mutex_unlock(g_context.blockDataListMutex);
2610
2611     return CA_STATUS_OK;
2612 }
2613
2614 CAResult_t CARemoveAllBlockDataFromList()
2615 {
2616     OIC_LOG(DEBUG, TAG, "CARemoveAllBlockDataFromList");
2617
2618     ca_mutex_lock(g_context.blockDataListMutex);
2619
2620     size_t len = u_arraylist_length(g_context.dataList);
2621     for (size_t i = len; i > 0; i--)
2622     {
2623         CABlockData_t *removedData = u_arraylist_remove(g_context.dataList, i - 1);
2624         if (removedData)
2625         {
2626             // destroy memory
2627             if (removedData->sentData)
2628             {
2629                 CADestroyDataSet(removedData->sentData);
2630             }
2631             CADestroyBlockID(removedData->blockDataId);
2632             OICFree(removedData->payload);
2633             OICFree(removedData);
2634         }
2635     }
2636     ca_mutex_unlock(g_context.blockDataListMutex);
2637
2638     return CA_STATUS_OK;
2639 }
2640
2641 void CADestroyDataSet(CAData_t* data)
2642 {
2643     VERIFY_NON_NULL_VOID(data, TAG, "data");
2644
2645     CAFreeEndpoint(data->remoteEndpoint);
2646     CADestroyRequestInfoInternal(data->requestInfo);
2647     CADestroyResponseInfoInternal(data->responseInfo);
2648     OICFree(data);
2649 }
2650
2651 CABlockDataID_t* CACreateBlockDatablockId(const CAToken_t token, uint8_t tokenLength,
2652                                           uint16_t portNumber)
2653 {
2654     char port[PORT_LENGTH] = { 0, };
2655     port[0] = (char) ((portNumber >> 8) & 0xFF);
2656     port[1] = (char) (portNumber & 0xFF);
2657
2658     CABlockDataID_t* blockDataID = (CABlockDataID_t *) OICMalloc(sizeof(CABlockDataID_t));
2659     if (!blockDataID)
2660     {
2661         OIC_LOG(ERROR, TAG, "memory alloc has failed");
2662         return NULL;
2663     }
2664     blockDataID->idLength = tokenLength + sizeof(port);
2665     blockDataID->id = (uint8_t *) OICMalloc(blockDataID->idLength);
2666     if (!blockDataID->id)
2667     {
2668         OIC_LOG(ERROR, TAG, "memory alloc has failed");
2669         OICFree(blockDataID);
2670         return NULL;
2671     }
2672
2673     if (token)
2674     {
2675         memcpy(blockDataID->id, token, tokenLength);
2676     }
2677
2678     memcpy(blockDataID->id + tokenLength, port, sizeof(port));
2679
2680     OIC_LOG(DEBUG, TAG, "BlockID is ");
2681     OIC_LOG_BUFFER(DEBUG, TAG, (const uint8_t *)blockDataID->id, blockDataID->idLength);
2682
2683     return blockDataID;
2684 }
2685
2686 void CADestroyBlockID(CABlockDataID_t *blockID)
2687 {
2688     VERIFY_NON_NULL_VOID(blockID, TAG, "blockID");
2689     OICFree(blockID->id);
2690     OICFree(blockID);
2691     blockID = NULL;
2692 }
2693
2694 bool CABlockidMatches(const CABlockData_t *currData, const CABlockDataID_t *blockID)
2695 {
2696     VERIFY_NON_NULL_RET(currData, TAG, "currData", false);
2697     VERIFY_NON_NULL_RET(blockID, TAG, "blockID", false);
2698     VERIFY_NON_NULL_RET(blockID->id, TAG, "blockID->id", false);
2699
2700     if ((currData->blockDataId)
2701         && (currData->blockDataId->id)
2702         && (currData->blockDataId->idLength == blockID->idLength)
2703         && !memcmp(currData->blockDataId->id, blockID->id, currData->blockDataId->idLength))
2704     {
2705         return true;
2706     }
2707     return false;
2708 }
2709
2710 void CALogBlockInfo(coap_block_t *block)
2711 {
2712     VERIFY_NON_NULL_VOID(block, TAG, "block");
2713
2714     OIC_LOG(DEBUG, TAG, "block option info");
2715
2716     OIC_LOG_V(DEBUG, TAG, "block option-num : %d", block->num);
2717
2718     OIC_LOG_V(DEBUG, TAG, "block option-m   : %d", block->m);
2719
2720     OIC_LOG_V(DEBUG, TAG, "block option-szx : %d", block->szx);
2721 }
2722
2723 CAResult_t CARemoveBlockDataFromListWithSeed(const CAToken_t token, uint8_t tokenLength,
2724                                              uint16_t portNumber)
2725 {
2726     CABlockDataID_t* blockDataID = CACreateBlockDatablockId(token, tokenLength, portNumber);
2727     if (NULL == blockDataID || blockDataID->idLength < 1)
2728     {
2729         OIC_LOG(ERROR, TAG, "blockId is null");
2730         CADestroyBlockID(blockDataID);
2731         return CA_STATUS_FAILED;
2732     }
2733
2734     CAResult_t res = CA_STATUS_OK;
2735
2736     if (NULL != CAGetBlockDataFromBlockDataList(blockDataID))
2737     {
2738         res = CARemoveBlockDataFromList(blockDataID);
2739         if (CA_STATUS_OK != res)
2740         {
2741             OIC_LOG(ERROR, TAG, "CARemoveBlockDataFromList failed");
2742         }
2743     }
2744
2745     CADestroyBlockID(blockDataID);
2746
2747     return res;
2748 }