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 "octhread.h"
  45 #include "logger.h"
  46 #include "oic_time.h"
  47
  48 #define TAG "OIC_CA_BWT"
  49
  50 #define BLOCKWISE_OPTION_BUFFER    (sizeof(unsigned int))
  51 #define BLOCK_NUMBER_IDX           4
  52 #define BLOCK_M_BIT_IDX            3
  53 #define PORT_LENGTH                2
  54
  55 #define BLOCK_SIZE(arg) (1 << ((arg) + 4))
  56
  57 #define BLOCK_DATA_TIMEOUT_SECONDS   (60 * 1)  // 1 minutes.
  58 static const uint64_t USECS_PER_SEC = 1000000;
  59
  60 // context for block-wise transfer
  61 static CABlockWiseContext_t g_context = { .sendThreadFunc = NULL,
  62                                           .receivedThreadFunc = NULL,
  63                                           .dataList = NULL };
  64
  65 static bool CACheckPayloadLength(const CAData_t *sendData)
  66 {
  67     size_t payloadLen = 0;
  68     CAGetPayloadInfo(sendData, &payloadLen);
  69
  70     // check if message has to be transfered to a block
  71     size_t maxBlockSize = BLOCK_SIZE(CA_DEFAULT_BLOCK_SIZE);
  72     OIC_LOG_V(DEBUG, TAG, "payloadLen=%zu, maxBlockSize=%zu", payloadLen, maxBlockSize);
  73
  74     if (payloadLen <= maxBlockSize)
  75     {
  76         return false;
  77     }
  78
  79     return true;
  80 }
  81
  82 CAResult_t CAInitializeBlockWiseTransfer(CASendThreadFunc sendThreadFunc,
  83                                          CAReceiveThreadFunc receivedThreadFunc)
  84 {
  85     OIC_LOG(DEBUG, TAG, "CAInitializeBlockWiseTransfer");
  86
  87     // set block-wise transfer context
  88     if (!g_context.sendThreadFunc)
  89     {
  90         g_context.sendThreadFunc = sendThreadFunc;
  91     }
  92
  93     if (!g_context.receivedThreadFunc)
  94     {
  95         g_context.receivedThreadFunc = receivedThreadFunc;
  96     }
  97
  98     if (!g_context.dataList)
  99     {
 100         g_context.dataList = u_arraylist_create();
 101     }
 102
 103     CAResult_t res = CAInitBlockWiseMutexVariables();
 104     if (CA_STATUS_OK != res)
 105     {
 106         u_arraylist_free(&g_context.dataList);
 107         g_context.dataList = NULL;
 108         OIC_LOG(ERROR, TAG, "init has failed");
 109     }
 110
 111     return res;
 112 }
 113
 114 CAResult_t CATerminateBlockWiseTransfer()
 115 {
 116     OIC_LOG(DEBUG, TAG, "CATerminateBlockWiseTransfer");
 117
 118     if (g_context.dataList)
 119     {
 120         CARemoveAllBlockDataFromList();
 121         u_arraylist_free(&g_context.dataList);
 122     }
 123
 124     CATerminateBlockWiseMutexVariables();
 125
 126     return CA_STATUS_OK;
 127 }
 128
 129 CAResult_t CAInitBlockWiseMutexVariables()
 130 {
 131     if (!g_context.blockDataListMutex)
 132     {
 133         g_context.blockDataListMutex = oc_mutex_new();
 134         if (!g_context.blockDataListMutex)
 135         {
 136             OIC_LOG(ERROR, TAG, "oc_mutex_new has failed");
 137             return CA_STATUS_FAILED;
 138         }
 139     }
 140
 141     if (!g_context.blockDataSenderMutex)
 142     {
 143         g_context.blockDataSenderMutex = oc_mutex_new();
 144         if (!g_context.blockDataSenderMutex)
 145         {
 146             OIC_LOG(ERROR, TAG, "oc_mutex_new has failed");
 147             CATerminateBlockWiseMutexVariables();
 148             return CA_STATUS_FAILED;
 149         }
 150     }
 151
 152     return CA_STATUS_OK;
 153 }
 154
 155 void CATerminateBlockWiseMutexVariables()
 156 {
 157     if (g_context.blockDataListMutex)
 158     {
 159         oc_mutex_free(g_context.blockDataListMutex);
 160         g_context.blockDataListMutex = NULL;
 161     }
 162
 163     if (g_context.blockDataSenderMutex)
 164     {
 165         oc_mutex_free(g_context.blockDataSenderMutex);
 166         g_context.blockDataSenderMutex = NULL;
 167     }
 168 }
 169
 170 CAResult_t CASendBlockWiseData(const CAData_t *sendData)
 171 {
 172     VERIFY_NON_NULL(sendData, TAG, "sendData");
 173
 174     // check if message type is CA_MSG_RESET
 175     if (sendData->requestInfo)
 176     {
 177         if (CA_MSG_RESET == sendData->requestInfo->info.type)
 178         {
 179             OIC_LOG(DEBUG, TAG, "reset message can't be sent to the block");
 180             return CA_NOT_SUPPORTED;
 181         }
 182
 183         /*
 184          * Other uses of the Block options in conjunction with multicast
 185          * messages are for further study.
 186          */
 187         if (sendData->requestInfo->isMulticast)
 188         {
 189             OIC_LOG(DEBUG, TAG, "multicast message can't be sent to the block");
 190             return CA_NOT_SUPPORTED;
 191         }
 192     }
 193     else if (sendData->responseInfo)
 194     {
 195         if (CA_MSG_RESET == sendData->responseInfo->info.type)
 196         {
 197             OIC_LOG(DEBUG, TAG, "reset message can't be sent to the block");
 198             return CA_NOT_SUPPORTED;
 199         }
 200         if (sendData->responseInfo->isMulticast)
 201         {
 202             OIC_LOG(DEBUG, TAG, "multicast message can't be sent to the block");
 203             return CA_NOT_SUPPORTED;
 204         }
 205     }
 206
 207     // #1. check if it is already included in block data list
 208     CABlockData_t *currData = NULL;
 209     CAResult_t res = CACheckBlockDataValidation(sendData, &currData);
 210     if (CA_STATUS_OK != res)
 211     {
 212         // #2. if it is not included, add the data into list
 213         if (!currData)
 214         {
 215             OIC_LOG(DEBUG, TAG, "There is no block data");
 216
 217             bool isBlock = CACheckPayloadLength(sendData);
 218             if (!isBlock)
 219             {
 220                 if (sendData->requestInfo)
 221                 {
 222                     currData = CACreateNewBlockData(sendData);
 223                     if (!currData)
 224                     {
 225                         OIC_LOG(ERROR, TAG, "failed to create block data");
 226                         return CA_MEMORY_ALLOC_FAILED;
 227                     }
 228                 }
 229                 return CA_NOT_SUPPORTED;
 230             }
 231             currData = CACreateNewBlockData(sendData);
 232             if (!currData)
 233             {
 234                 OIC_LOG(ERROR, TAG, "failed to create block data");
 235                 return CA_MEMORY_ALLOC_FAILED;
 236             }
 237         }
 238     }
 239
 240     // #3. check request/response block option type and payload length
 241     res = CACheckBlockOptionType(currData);
 242     if (CA_STATUS_OK == res)
 243     {
 244         // #4. send block message
 245         OIC_LOG(DEBUG, TAG, "send first block msg");
 246         res = CAAddSendThreadQueue(currData->sentData,
 247                                    (const CABlockDataID_t *) &currData->blockDataId);
 248         if (CA_STATUS_OK != res)
 249         {
 250             OIC_LOG(ERROR, TAG, "add has failed");
 251             return res;
 252         }
 253     }
 254
 255     return res;
 256 }
 257
 258 CAResult_t CAAddSendThreadQueue(const CAData_t *sendData, const CABlockDataID_t *blockID)
 259 {
 260     VERIFY_NON_NULL(sendData, TAG, "sendData");
 261     VERIFY_NON_NULL(blockID, TAG, "blockID");
 262
 263     CAData_t *cloneData = CACloneCAData(sendData);
 264     if (!cloneData)
 265     {
 266         OIC_LOG(ERROR, TAG, "clone has failed");
 267         CARemoveBlockDataFromList(blockID);
 268         return CA_STATUS_FAILED;
 269     }
 270
 271     if (g_context.sendThreadFunc)
 272     {
 273         oc_mutex_lock(g_context.blockDataSenderMutex);
 274         g_context.sendThreadFunc(cloneData);
 275         oc_mutex_unlock(g_context.blockDataSenderMutex);
 276     }
 277     else
 278     {
 279         CADestroyDataSet(cloneData);
 280     }
 281     return CA_STATUS_OK;
 282 }
 283
 284 CAResult_t CACheckBlockOptionType(CABlockData_t *currData)
 285 {
 286     VERIFY_NON_NULL(currData, TAG, "currData");
 287     VERIFY_NON_NULL(currData->sentData, TAG, "currData->sentData");
 288
 289     bool isBlock = CACheckPayloadLength(currData->sentData);
 290     if (!isBlock)
 291     {
 292         return CA_NOT_SUPPORTED;
 293     }
 294
 295     // set block option (COAP_OPTION_BLOCK2 or COAP_OPTION_BLOCK1)
 296     if (currData->sentData->requestInfo) // request message
 297     {
 298         currData->type = COAP_OPTION_BLOCK1;
 299     }
 300     else // response message
 301     {
 302         currData->type = COAP_OPTION_BLOCK2;
 303     }
 304
 305     return CA_STATUS_OK;
 306 }
 307
 308 // TODO make pdu const after libcoap is updated to support that.
 309 CAResult_t CAReceiveBlockWiseData(coap_pdu_t *pdu, const CAEndpoint_t *endpoint,
 310                                   const CAData_t *receivedData, size_t dataLen)
 311 {
 312     OIC_LOG(DEBUG, TAG, "CAReceiveBlockWiseData");
 313     VERIFY_NON_NULL(pdu, TAG, "pdu");
 314     VERIFY_NON_NULL(pdu->transport_hdr, TAG, "pdu->transport_hdr");
 315     VERIFY_NON_NULL(endpoint, TAG, "endpoint");
 316     VERIFY_NON_NULL(receivedData, TAG, "receivedData");
 317
 318     // check if received message type is CA_MSG_RESET
 319     if (CA_EMPTY == pdu->transport_hdr->udp.code)
 320     {
 321         OIC_LOG(DEBUG, TAG, "code is CA_EMPTY..");
 322
 323         if (!receivedData->responseInfo->info.token)
 324         {
 325             // get token from block-wise transfer list when CA_EMPTY(RST/ACK) is received
 326             CAResult_t res = CAGetTokenFromBlockDataList(pdu, endpoint,
 327                                                          receivedData->responseInfo);
 328             if (CA_STATUS_OK != res)
 329             {
 330                 OIC_LOG(ERROR, TAG, "fail to get token");
 331                 return res;
 332             }
 333         }
 334
 335         CABlockDataID_t* blockDataID = CACreateBlockDatablockId(
 336                 receivedData->responseInfo->info.token,
 337                 receivedData->responseInfo->info.tokenLength,
 338                 endpoint->port);
 339         if (NULL == blockDataID || blockDataID->idLength < 1)
 340         {
 341             // if retransmission is timeout, callback msg will be send without token.
 342             if (NULL == blockDataID && !receivedData->responseInfo->info.token)
 343             {
 344                 OIC_LOG(INFO, TAG, "retransmission was stopped");
 345                 return CA_REQUEST_TIMEOUT;
 346             }
 347
 348             OIC_LOG(ERROR, TAG, "blockId is null");
 349             CADestroyBlockID(blockDataID);
 350             return CA_STATUS_FAILED;
 351         }
 352
 353         // If we didn't send the last block message and received EMPTY message,
 354         // we have to remain the block data from list.
 355         CABlockData_t *data = CAGetBlockDataFromBlockDataList(blockDataID);
 356         if (data && (data->block1.m || data->block2.m))
 357         {
 358             OIC_LOG(DEBUG, TAG, "this is normal EMPTY message for blockwise-transfer.");
 359             CADestroyBlockID(blockDataID);
 360             return CA_STATUS_OK;
 361         }
 362
 363         CARemoveBlockDataFromList(blockDataID);
 364         CADestroyBlockID(blockDataID);
 365         return CA_NOT_SUPPORTED;
 366     }
 367
 368     // check if block option is set and get block data
 369     coap_block_t block = { 0, 0, 0 };
 370
 371     // get block1 option
 372     int isBlock1 = coap_get_block(pdu, COAP_OPTION_BLOCK1, &block);
 373     if (isBlock1)
 374     {
 375         CAResult_t res = CASetNextBlockOption1(pdu, endpoint, receivedData, block, dataLen);
 376         if (CA_STATUS_OK != res)
 377         {
 378             OIC_LOG(ERROR, TAG, "setting has failed");
 379             return res;
 380         }
 381     }
 382
 383     // get block2 option
 384     int isBlock2 = coap_get_block(pdu, COAP_OPTION_BLOCK2, &block);
 385     if (isBlock2)
 386     {
 387         CAResult_t res = CASetNextBlockOption2(pdu, endpoint, receivedData, block, dataLen);
 388         if (CA_STATUS_OK != res)
 389         {
 390             OIC_LOG(ERROR, TAG, "setting has failed");
 391             return res;
 392         }
 393     }
 394
 395     // if there is no block option in pdu, check if there is error code.
 396     if (!isBlock1 && !isBlock2)
 397     {
 398         CABlockDataID_t* blockDataID = CACreateBlockDatablockId(
 399                 (CAToken_t)pdu->transport_hdr->udp.token,
 400                 pdu->transport_hdr->udp.token_length,
 401                 endpoint->port);
 402         if (NULL == blockDataID || blockDataID->idLength < 1)
 403         {
 404             OIC_LOG(ERROR, TAG, "blockId is null");
 405             CADestroyBlockID(blockDataID);
 406             return CA_STATUS_FAILED;
 407         }
 408
 409         uint32_t code = CA_RESPONSE_CODE(pdu->transport_hdr->udp.code);
 410         if (CA_REQUEST_ENTITY_INCOMPLETE == code)
 411         {
 412             CABlockData_t *data = CAGetBlockDataFromBlockDataList(blockDataID);
 413             if (!data)
 414             {
 415                 OIC_LOG(ERROR, TAG, "getting has failed");
 416                 CADestroyBlockID(blockDataID);
 417                 return CA_STATUS_FAILED;
 418             }
 419
 420             coap_block_t *block = CAGetBlockOption(blockDataID, data->type);
 421             if (!block)
 422             {
 423                 OIC_LOG(ERROR, TAG, "block is null");
 424                 CADestroyBlockID(blockDataID);
 425                 return CA_STATUS_FAILED;
 426             }
 427
 428             CAResult_t res = CA_STATUS_OK;
 429             if (COAP_OPTION_BLOCK2 == data->type)
 430             {
 431                 res = CASetNextBlockOption2(pdu, endpoint, receivedData, *block, dataLen);
 432                 if (CA_STATUS_OK != res)
 433                 {
 434                     OIC_LOG(ERROR, TAG, "setting has failed");
 435                     CADestroyBlockID(blockDataID);
 436                     return CA_STATUS_FAILED;
 437                 }
 438             }
 439             else if (COAP_OPTION_BLOCK1 == data->type)
 440             {
 441                 res = CASetNextBlockOption1(pdu, endpoint, receivedData, *block, dataLen);
 442                 if (CA_STATUS_OK != res)
 443                 {
 444                     OIC_LOG(ERROR, TAG, "setting has failed");
 445                     CADestroyBlockID(blockDataID);
 446                     return res;
 447                 }
 448             }
 449             CADestroyBlockID(blockDataID);
 450         }
 451         else
 452         {
 453             // normal pdu data
 454             OIC_LOG(DEBUG, TAG, "it's normal pdu");
 455
 456             // if received data is response message
 457             // and sent data remain in block data list, remove block data
 458             if (receivedData->responseInfo)
 459             {
 460                 CARemoveBlockDataFromList(blockDataID);
 461             }
 462             CADestroyBlockID(blockDataID);
 463             return CA_NOT_SUPPORTED;
 464         }
 465     }
 466     return CA_STATUS_OK;
 467 }
 468
 469 CAResult_t CAProcessNextStep(const coap_pdu_t *pdu, const CAData_t *receivedData,
 470                              uint8_t blockWiseStatus, const CABlockDataID_t *blockID)
 471 {
 472     VERIFY_NON_NULL(pdu, TAG, "pdu");
 473     VERIFY_NON_NULL(pdu->hdr, TAG, "pdu->hdr");
 474     VERIFY_NON_NULL(blockID, TAG, "blockID");
 475
 476     CAResult_t res = CA_STATUS_OK;
 477     CAData_t *data = NULL;
 478
 479     // process blockWiseStatus
 480     switch (blockWiseStatus)
 481     {
 482         case CA_OPTION2_FIRST_BLOCK:
 483             res = CAAddSendThreadQueue(receivedData, blockID);
 484             if (CA_STATUS_OK != res)
 485             {
 486                 OIC_LOG(ERROR, TAG, "add has failed");
 487                 return res;
 488             }
 489             break;
 490
 491         case CA_OPTION2_REQUEST:
 492             // add data to send thread
 493             data = CAGetDataSetFromBlockDataList(blockID);
 494             if (!data)
 495             {
 496                 OIC_LOG(ERROR, TAG, "it's unavailable");
 497                 return CA_STATUS_FAILED;
 498             }
 499
 500             if (data->responseInfo)
 501             {
 502                 data->responseInfo->info.type =
 503                         (pdu->transport_hdr->udp.type == CA_MSG_CONFIRM) ?
 504                                 CA_MSG_ACKNOWLEDGE : CA_MSG_NONCONFIRM;
 505                 data->responseInfo->info.messageId = pdu->transport_hdr->udp.id;
 506
 507                 res = CAAddSendThreadQueue(data, blockID);
 508                 if (CA_STATUS_OK != res)
 509                 {
 510                     OIC_LOG(ERROR, TAG, "add has failed");
 511                     return res;
 512                 }
 513             }
 514             break;
 515
 516         case CA_OPTION1_RESPONSE:
 517         case CA_OPTION2_RESPONSE:
 518         case CA_OPTION1_REQUEST_BLOCK:
 519             res = CASendBlockMessage(pdu, pdu->transport_hdr->udp.type, blockID);
 520             if (CA_STATUS_OK != res)
 521             {
 522                 OIC_LOG(ERROR, TAG, "send has failed");
 523                 return res;
 524             }
 525             break;
 526
 527         case CA_OPTION2_LAST_BLOCK:
 528             // process last block and send upper layer
 529             res = CAReceiveLastBlock(blockID, receivedData);
 530             if (CA_STATUS_OK != res)
 531             {
 532                 OIC_LOG(ERROR, TAG, "receive has failed");
 533                 return res;
 534             }
 535
 536             // remove data from list
 537             res = CARemoveBlockDataFromList(blockID);
 538             if (CA_STATUS_OK != res)
 539             {
 540                 OIC_LOG(ERROR, TAG, "remove has failed");
 541                 return res;
 542             }
 543             break;
 544
 545         case CA_OPTION1_REQUEST_LAST_BLOCK:
 546             // process last block and send upper layer
 547             res = CAReceiveLastBlock(blockID, receivedData);
 548             if (CA_STATUS_OK != res)
 549             {
 550                 OIC_LOG(ERROR, TAG, "receive has failed");
 551                 return res;
 552             }
 553             break;
 554
 555         case CA_BLOCK_INCOMPLETE:
 556             // add data to send thread
 557             res = CASendErrorMessage(pdu, blockWiseStatus, CA_REQUEST_ENTITY_INCOMPLETE, blockID);
 558             if (CA_STATUS_OK != res)
 559             {
 560                 OIC_LOG(ERROR, TAG, "send has failed");
 561                 return res;
 562             }
 563             break;
 564
 565         case CA_BLOCK_TOO_LARGE:
 566             if (receivedData->requestInfo)
 567             {
 568                 res = CASendErrorMessage(pdu, blockWiseStatus, CA_REQUEST_ENTITY_TOO_LARGE,
 569                                          blockID);
 570                 if (CA_STATUS_OK != res)
 571                 {
 572                     OIC_LOG(ERROR, TAG, "send has failed");
 573                     return res;
 574                 }
 575             }
 576             else if (receivedData->responseInfo)
 577             {
 578                 res = CASendBlockMessage(pdu, pdu->transport_hdr->udp.type, blockID);
 579                 if (CA_STATUS_OK != res)
 580                 {
 581                     OIC_LOG(ERROR, TAG, "send has failed");
 582                     return res;
 583                 }
 584             }
 585             break;
 586         default:
 587             OIC_LOG_V(ERROR, TAG, "no logic [%d]", blockWiseStatus);
 588     }
 589     return CA_STATUS_OK;
 590 }
 591
 592 static CAResult_t CASendDirectEmptyResponse(const CAEndpoint_t *endpoint, uint16_t messageId)
 593 {
 594     OIC_LOG(DEBUG, TAG, "Entering CASendDirectEmptyResponse");
 595     CAResponseInfo_t respInfo = {
 596         .result = CA_EMPTY
 597     };
 598     respInfo.info.type = CA_MSG_ACKNOWLEDGE;
 599     respInfo.info.messageId = messageId;
 600     respInfo.info.dataType = CA_RESPONSE_DATA;
 601
 602     CAResult_t caResult = CASendResponse(endpoint, &respInfo);
 603
 604     OIC_LOG(DEBUG, TAG, "Exit CASendDirectEmptyResponse");
 605     return caResult;
 606 }
 607
 608 CAResult_t CASendBlockMessage(const coap_pdu_t *pdu, CAMessageType_t msgType,
 609                               const CABlockDataID_t *blockID)
 610 {
 611     VERIFY_NON_NULL(pdu, TAG, "pdu");
 612     VERIFY_NON_NULL(pdu->transport_hdr, TAG, "pdu->transport_hdr");
 613     VERIFY_NON_NULL(blockID, TAG, "blockID");
 614
 615     CAData_t *data = CAGetDataSetFromBlockDataList(blockID);
 616     if (!data)
 617     {
 618         OIC_LOG(ERROR, TAG, "CAData is unavailable");
 619         return CA_STATUS_FAILED;
 620     }
 621
 622     CAMessageType_t sentMsgType = CA_MSG_NONCONFIRM;
 623     switch (msgType)
 624     {
 625         case CA_MSG_CONFIRM:
 626             sentMsgType = CA_MSG_ACKNOWLEDGE;
 627             break;
 628         case CA_MSG_ACKNOWLEDGE:
 629             sentMsgType = CA_MSG_CONFIRM;
 630             break;
 631         default:
 632             sentMsgType = CA_MSG_NONCONFIRM;
 633             break;
 634     }
 635
 636     uint32_t code = pdu->transport_hdr->udp.code;
 637     if (CA_GET == code || CA_POST == code || CA_PUT == code || CA_DELETE == code)
 638     {
 639         if (data->responseInfo)
 640         {
 641             OIC_LOG(DEBUG, TAG, "set response info");
 642             data->responseInfo->info.messageId = pdu->transport_hdr->udp.id;
 643             data->responseInfo->info.type = sentMsgType;
 644             data->responseInfo->result = CA_CONTINUE;
 645         }
 646     }
 647     else
 648     {
 649         if (data->requestInfo)
 650         {
 651             // if the received response message type is CON, send empty message.
 652             // and then, send next block request message with new messagId.
 653             if (msgType == CA_MSG_CONFIRM)
 654             {
 655                 CASendDirectEmptyResponse(data->remoteEndpoint,
 656                                           data->requestInfo->info.messageId);
 657                 sentMsgType = CA_MSG_CONFIRM;
 658             }
 659
 660             OIC_LOG(DEBUG, TAG, "need new msgID");
 661             data->requestInfo->info.messageId = 0;
 662             data->requestInfo->info.type = sentMsgType;
 663         }
 664         else if (data->responseInfo)
 665         {
 666             data->responseInfo->info.messageId = pdu->transport_hdr->udp.id;
 667             data->responseInfo->info.type = sentMsgType;
 668         }
 669     }
 670
 671     // add data to send thread
 672     CAResult_t res = CAAddSendThreadQueue(data, blockID);
 673     if (CA_STATUS_OK != res)
 674     {
 675         OIC_LOG(ERROR, TAG, "add has failed");
 676     }
 677
 678     return res;
 679 }
 680
 681 CAResult_t CASendErrorMessage(const coap_pdu_t *pdu, uint8_t status,
 682                               CAResponseResult_t responseResult, const CABlockDataID_t *blockID)
 683 {
 684     VERIFY_NON_NULL(pdu, TAG, "pdu");
 685     VERIFY_NON_NULL(pdu->transport_hdr, TAG, "pdu->transport_hdr");
 686     VERIFY_NON_NULL(blockID, TAG, "blockID");
 687
 688     // create error responseInfo
 689     CABlockData_t *data = CAGetBlockDataFromBlockDataList(blockID);
 690     if (!data)
 691     {
 692         OIC_LOG(ERROR, TAG, "data is unavailable");
 693         return CA_STATUS_FAILED;
 694     }
 695
 696     if (!data->sentData)
 697     {
 698         OIC_LOG(ERROR, TAG, "data has no sent-data");
 699         return CA_STATUS_FAILED;
 700     }
 701
 702     CAData_t *cloneData = CACloneCAData(data->sentData);
 703     if (!cloneData)
 704     {
 705         OIC_LOG(ERROR, TAG, "clone has failed");
 706         return CA_MEMORY_ALLOC_FAILED;
 707     }
 708
 709     CAMessageType_t sentMsgType = CA_MSG_NONCONFIRM;
 710     switch (pdu->transport_hdr->udp.type)
 711     {
 712         case CA_MSG_CONFIRM:
 713             sentMsgType = CA_MSG_ACKNOWLEDGE;
 714             break;
 715         case CA_MSG_ACKNOWLEDGE:
 716             sentMsgType = CA_MSG_CONFIRM;
 717             break;
 718         default:
 719             sentMsgType = CA_MSG_NONCONFIRM;
 720     }
 721
 722     if (cloneData->responseInfo)
 723     {
 724         cloneData->responseInfo->info.messageId = pdu->transport_hdr->udp.id;
 725         cloneData->responseInfo->info.type = sentMsgType;
 726         cloneData->responseInfo->result = responseResult;
 727     }
 728     else
 729     {
 730         CAInfo_t responseData = { .tokenLength = pdu->transport_hdr->udp.token_length };
 731         responseData.token = (CAToken_t) OICMalloc(responseData.tokenLength);
 732         if (!responseData.token)
 733         {
 734             OIC_LOG(ERROR, TAG, "out of memory");
 735             CADestroyDataSet(cloneData);
 736             return CA_MEMORY_ALLOC_FAILED;
 737         }
 738         memcpy(responseData.token, pdu->transport_hdr->udp.token, responseData.tokenLength);
 739
 740         cloneData->responseInfo = (CAResponseInfo_t*) OICCalloc(1, sizeof(CAResponseInfo_t));
 741         if (!cloneData->responseInfo)
 742         {
 743             OIC_LOG(ERROR, TAG, "out of memory");
 744             CADestroyDataSet(cloneData);
 745             OICFree(responseData.token);
 746             return CA_MEMORY_ALLOC_FAILED;
 747         }
 748
 749         cloneData->responseInfo->info = responseData;
 750         cloneData->responseInfo->info.type = sentMsgType;
 751         cloneData->responseInfo->result = responseResult;
 752     }
 753
 754     OIC_LOG(DEBUG, TAG, "set response message to send error code");
 755
 756     // if there is a requestInfo, remove it to send response message
 757     if (cloneData->requestInfo)
 758     {
 759         CADestroyRequestInfoInternal(cloneData->requestInfo);
 760         cloneData->requestInfo = NULL;
 761     }
 762
 763     // add data to send thread
 764     if (g_context.sendThreadFunc)
 765     {
 766         oc_mutex_lock(g_context.blockDataSenderMutex);
 767         g_context.sendThreadFunc(cloneData);
 768         oc_mutex_unlock(g_context.blockDataSenderMutex);
 769     }
 770     else
 771     {
 772         CADestroyDataSet(cloneData);
 773     }
 774
 775     // if error code is 4.08, remove the stored payload and initialize block number
 776     if (CA_BLOCK_INCOMPLETE == status)
 777     {
 778         OICFree(data->payload);
 779         data->payload = NULL;
 780         data->payloadLength = 0;
 781         data->receivedPayloadLen = 0;
 782         data->block1.num = 0;
 783         data->block2.num = 0;
 784     }
 785
 786     return CA_STATUS_OK;
 787 }
 788
 789 CAResult_t CAReceiveLastBlock(const CABlockDataID_t *blockID, const CAData_t *receivedData)
 790 {
 791     VERIFY_NON_NULL(blockID, TAG, "blockID");
 792     VERIFY_NON_NULL(receivedData, TAG, "receivedData");
 793
 794     // total block data have to notify to Application
 795     CAData_t *cloneData = CACloneCAData(receivedData);
 796     if (!cloneData)
 797     {
 798         OIC_LOG(ERROR, TAG, "clone has failed");
 799         return CA_MEMORY_ALLOC_FAILED;
 800     }
 801
 802     // update payload
 803     size_t fullPayloadLen = 0;
 804     CAPayload_t fullPayload = CAGetPayloadFromBlockDataList(blockID, &fullPayloadLen);
 805     if (fullPayload)
 806     {
 807         CAResult_t res = CAUpdatePayloadToCAData(cloneData, fullPayload, fullPayloadLen);
 808         if (CA_STATUS_OK != res)
 809         {
 810             OIC_LOG(ERROR, TAG, "update has failed");
 811             CADestroyDataSet(cloneData);
 812             return res;
 813         }
 814     }
 815
 816     if (g_context.receivedThreadFunc)
 817     {
 818         g_context.receivedThreadFunc(cloneData);
 819     }
 820     else
 821     {
 822         CADestroyDataSet(cloneData);
 823     }
 824
 825     return CA_STATUS_OK;
 826 }
 827
 828 static CABlockData_t* CACheckTheExistOfBlockData(const CABlockDataID_t* blockDataID,
 829                                                  coap_pdu_t *pdu, const CAEndpoint_t *endpoint,
 830                                                  uint8_t blockType)
 831 {
 832     // Get BlockData data. If does not exist, create a new data
 833     CABlockData_t *data = CAGetBlockDataFromBlockDataList(blockDataID);
 834     if (!data)
 835     {
 836         OIC_LOG(DEBUG, TAG, "block data doesn't exist in list. create new one");
 837
 838         CAData_t *cadata = CACreateNewDataSet(pdu, endpoint);
 839         if (!cadata)
 840         {
 841             OIC_LOG(ERROR, TAG, "data is null");
 842             return NULL;
 843         }
 844
 845         data = CACreateNewBlockData(cadata);
 846         if (!data)
 847         {
 848             OIC_LOG(ERROR, TAG, "failed to create a new block data");
 849             CADestroyDataSet(cadata);
 850             return NULL;
 851         }
 852         CADestroyDataSet(cadata);
 853     }
 854
 855     // update BLOCK OPTION type
 856     CAResult_t res = CAUpdateBlockOptionType(blockDataID, blockType);
 857     if (CA_STATUS_OK != res)
 858     {
 859         OIC_LOG(ERROR, TAG, "update has failed");
 860         return NULL;
 861     }
 862
 863     return data;
 864 }
 865
 866 // TODO make pdu const after libcoap is updated to support that.
 867 CAResult_t CASetNextBlockOption1(coap_pdu_t *pdu, const CAEndpoint_t *endpoint,
 868                                  const CAData_t *receivedData, coap_block_t block,
 869                                  size_t dataLen)
 870 {
 871     OIC_LOG(INFO, TAG, "CASetNextBlockOption1");
 872     VERIFY_NON_NULL(pdu, TAG, "pdu");
 873     VERIFY_NON_NULL(pdu->transport_hdr, TAG, "pdu->transport_hdr");
 874     VERIFY_NON_NULL(endpoint, TAG, "endpoint");
 875     VERIFY_NON_NULL(receivedData, TAG, "receivedData");
 876
 877     OIC_LOG_V(INFO, TAG, "num:%d, M:%d, sze:%d", block.num, block.m, block.szx);
 878
 879     CABlockDataID_t* blockDataID = CACreateBlockDatablockId(
 880             (CAToken_t)pdu->transport_hdr->udp.token,
 881             pdu->transport_hdr->udp.token_length,
 882             endpoint->port);
 883     if (NULL == blockDataID || blockDataID->idLength < 1)
 884     {
 885         OIC_LOG(ERROR, TAG, "blockId is null");
 886         CADestroyBlockID(blockDataID);
 887         return CA_STATUS_FAILED;
 888     }
 889
 890     CAResult_t res = CA_STATUS_OK;
 891     CABlockData_t *data = CACheckTheExistOfBlockData(blockDataID, pdu, endpoint,
 892                                                      COAP_OPTION_BLOCK1);
 893     if (!data)
 894     {
 895         OIC_LOG(ERROR, TAG, "Failed to create or get block data");
 896         res = CA_STATUS_FAILED;
 897         goto exit;
 898     }
 899
 900     uint8_t blockWiseStatus = CA_BLOCK_UNKNOWN;
 901     uint32_t code = pdu->transport_hdr->udp.code;
 902     if (CA_GET == code || CA_POST == code || CA_PUT == code || CA_DELETE == code)
 903     {
 904         // received message type is request
 905         OIC_LOG_V(INFO, TAG, "num:%d, M:%d", block.num, block.m);
 906
 907         // check the size option
 908         bool isSizeOption = CAIsPayloadLengthInPduWithBlockSizeOption(pdu, COAP_OPTION_SIZE1,
 909                                                                       &(data->payloadLength));
 910
 911         blockWiseStatus = CACheckBlockErrorType(data, &block, receivedData,
 912                                                 COAP_OPTION_BLOCK1, dataLen);
 913
 914         if (CA_BLOCK_RECEIVED_ALREADY != blockWiseStatus)
 915         {
 916             // store the received payload and merge
 917             res = CAUpdatePayloadData(data, receivedData, blockWiseStatus,
 918                                       isSizeOption, COAP_OPTION_BLOCK1);
 919             if (CA_STATUS_OK != res)
 920             {
 921                 OIC_LOG(ERROR, TAG, "update has failed");
 922                 goto exit;
 923             }
 924
 925             res = CAUpdateBlockOptionItems(data, pdu, &block, COAP_OPTION_BLOCK1,
 926                                            blockWiseStatus);
 927             if (CA_STATUS_OK != res)
 928             {
 929                 OIC_LOG(ERROR, TAG, "update has failed");
 930                 goto exit;
 931             }
 932
 933             // update block data
 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         // check the blcok-wise transfer status for next step
 943         if (CA_BLOCK_UNKNOWN == blockWiseStatus || CA_BLOCK_RECEIVED_ALREADY == blockWiseStatus)
 944         {
 945             OIC_LOG_V(DEBUG, TAG, "M bit is %d", block.m);
 946
 947             blockWiseStatus = (0 == block.m) ?
 948                     CA_OPTION1_REQUEST_LAST_BLOCK : CA_OPTION1_REQUEST_BLOCK;
 949         }
 950     }
 951     else
 952     {
 953         // received message type is response
 954         uint32_t code = CA_RESPONSE_CODE(pdu->transport_hdr->udp.code);
 955         if (0 == block.m && (CA_REQUEST_ENTITY_INCOMPLETE != code
 956                 && CA_REQUEST_ENTITY_TOO_LARGE != code))
 957         {
 958             int isBlock2 = coap_get_block(pdu, COAP_OPTION_BLOCK2, &block);
 959             if (isBlock2)
 960             {
 961                 OIC_LOG(INFO, TAG, "received data is combining block1 and block2");
 962                 // initialize block number for response message
 963                 data->block1.num = 0;
 964                 CADestroyBlockID(blockDataID);
 965                 return CA_STATUS_OK;
 966             }
 967             else
 968             {
 969                 OIC_LOG(INFO, TAG, "received data is not bulk data");
 970                 CAReceiveLastBlock(blockDataID, receivedData);
 971                 res = CA_STATUS_OK;
 972                 goto exit;
 973             }
 974         }
 975
 976         blockWiseStatus = CA_OPTION1_RESPONSE;
 977         res = CAUpdateBlockOptionItems(data, pdu, &block, COAP_OPTION_BLOCK1, blockWiseStatus);
 978         if (CA_STATUS_OK != res)
 979         {
 980             OIC_LOG(ERROR, TAG, "update has failed");
 981             CADestroyBlockID(blockDataID);
 982             return res;
 983         }
 984
 985         res = CAUpdateBlockData(data, block, COAP_OPTION_BLOCK1);
 986         if (CA_STATUS_OK != res)
 987         {
 988             OIC_LOG(ERROR, TAG, "update has failed");
 989             goto exit;
 990         }
 991     }
 992
 993     res = CAProcessNextStep(pdu, receivedData, blockWiseStatus, blockDataID);
 994     if (CA_STATUS_OK != res)
 995     {
 996         OIC_LOG(ERROR, TAG, "setting has failed");
 997         goto exit;
 998     }
 999
1000     CADestroyBlockID(blockDataID);
1001     return res;
1002
1003 exit:
1004     CARemoveBlockDataFromList(blockDataID);
1005     CADestroyBlockID(blockDataID);
1006     return res;
1007 }
1008
1009 // TODO make pdu const after libcoap is updated to support that.
1010 CAResult_t CASetNextBlockOption2(coap_pdu_t *pdu, const CAEndpoint_t *endpoint,
1011                                  const CAData_t *receivedData, coap_block_t block,
1012                                  size_t dataLen)
1013 {
1014     OIC_LOG(DEBUG, TAG, "CASetNextBlockOption2");
1015     OIC_LOG_V(INFO, TAG, "num:%d, M:%d, sze:%d", block.num, block.m, block.szx);
1016
1017     VERIFY_NON_NULL(pdu, TAG, "pdu");
1018     VERIFY_NON_NULL(pdu->transport_hdr, TAG, "pdu->transport_hdr");
1019     VERIFY_NON_NULL(endpoint, TAG, "endpoint");
1020     VERIFY_NON_NULL(receivedData, TAG, "receivedData");
1021
1022     CABlockDataID_t* blockDataID = CACreateBlockDatablockId(
1023             (CAToken_t)pdu->transport_hdr->udp.token,
1024             pdu->transport_hdr->udp.token_length,
1025             endpoint->port);
1026     if (NULL == blockDataID || blockDataID->idLength < 1)
1027     {
1028         OIC_LOG(ERROR, TAG, "blockId is null");
1029         CADestroyBlockID(blockDataID);
1030         return CA_STATUS_FAILED;
1031     }
1032
1033     CAResult_t res = CA_STATUS_OK;
1034     CABlockData_t *data = CACheckTheExistOfBlockData(blockDataID, pdu, endpoint,
1035                                                      COAP_OPTION_BLOCK2);
1036     if (!data)
1037     {
1038         OIC_LOG(ERROR, TAG, "Failed to create or get block data");
1039         res = CA_STATUS_FAILED;
1040         goto exit;
1041     }
1042
1043     uint8_t blockWiseStatus = CA_BLOCK_UNKNOWN;
1044     if (0 == block.num && CA_GET == pdu->transport_hdr->udp.code && 0 == block.m)
1045     {
1046         OIC_LOG(INFO, TAG, "first block number");
1047
1048         res = CAUpdateBlockOptionItems(data, pdu, &block, COAP_OPTION_BLOCK2, blockWiseStatus);
1049         if (CA_STATUS_OK != res)
1050         {
1051             OIC_LOG(ERROR, TAG, "update has failed");
1052             goto exit;
1053         }
1054
1055         // first block data have to notify to Application
1056         res = CAUpdateBlockData(data, block, COAP_OPTION_BLOCK2);
1057         if (CA_STATUS_OK != res)
1058         {
1059             OIC_LOG(ERROR, TAG, "update has failed");
1060             goto exit;
1061         }
1062         blockWiseStatus = CA_OPTION2_FIRST_BLOCK;
1063     }
1064     else
1065     {
1066         uint32_t code = pdu->transport_hdr->udp.code;
1067         if (CA_GET == code || CA_POST == code || CA_PUT == code || CA_DELETE == code)
1068         {
1069             // received message type is request
1070             OIC_LOG_V(INFO, TAG, "num:%d, M:%d", block.num, block.m);
1071
1072             blockWiseStatus = CA_OPTION2_REQUEST;
1073
1074             res = CAUpdateBlockOptionItems(data, pdu, &block, COAP_OPTION_BLOCK2, blockWiseStatus);
1075             if (CA_STATUS_OK != res)
1076             {
1077                 OIC_LOG(ERROR, TAG, "update has failed");
1078                 goto exit;
1079             }
1080
1081             res = CAUpdateBlockData(data, block, COAP_OPTION_BLOCK2);
1082             if (CA_STATUS_OK != res)
1083             {
1084                 OIC_LOG(ERROR, TAG, "update has failed");
1085                 goto exit;
1086             }
1087         }
1088         else
1089         {
1090             // received message type is response
1091             OIC_LOG(DEBUG, TAG, "received response message with block option2");
1092
1093             // check the size option
1094             bool isSizeOption = CAIsPayloadLengthInPduWithBlockSizeOption(pdu,
1095                                                                           COAP_OPTION_SIZE2,
1096                                                                           &(data->payloadLength));
1097
1098             uint32_t code = CA_RESPONSE_CODE(pdu->transport_hdr->udp.code);
1099             if (CA_REQUEST_ENTITY_INCOMPLETE != code && CA_REQUEST_ENTITY_TOO_LARGE != code)
1100             {
1101                 // check if received payload is exact
1102                 blockWiseStatus = CACheckBlockErrorType(data, &block, receivedData,
1103                                                         COAP_OPTION_BLOCK2, dataLen);
1104             }
1105
1106             if (CA_BLOCK_RECEIVED_ALREADY != blockWiseStatus)
1107             {
1108                 // store the received payload and merge
1109                 res = CAUpdatePayloadData(data, receivedData, blockWiseStatus,
1110                                           isSizeOption, COAP_OPTION_BLOCK2);
1111                 if (CA_STATUS_OK != res)
1112                 {
1113                     OIC_LOG(ERROR, TAG, "update has failed");
1114                     goto exit;
1115                 }
1116             }
1117
1118             if (0 == block.m && CA_BLOCK_UNKNOWN == blockWiseStatus) // Last block is received
1119             {
1120                 OIC_LOG(DEBUG, TAG, "M bit is 0");
1121                 blockWiseStatus = CA_OPTION2_LAST_BLOCK;
1122             }
1123             else
1124             {
1125                 if (CA_BLOCK_UNKNOWN == blockWiseStatus ||
1126                         CA_BLOCK_RECEIVED_ALREADY == blockWiseStatus)
1127                 {
1128                     OIC_LOG(DEBUG, TAG, "M bit is 1");
1129                     blockWiseStatus = CA_OPTION2_RESPONSE;
1130                 }
1131
1132                 res = CAUpdateBlockOptionItems(data, pdu, &block, COAP_OPTION_BLOCK2,
1133                                                blockWiseStatus);
1134                 if (CA_STATUS_OK != res)
1135                 {
1136                     OIC_LOG(ERROR, TAG, "update has failed");
1137                     goto exit;
1138                 }
1139
1140                 res = CAUpdateBlockData(data, block, COAP_OPTION_BLOCK2);
1141                 if (CA_STATUS_OK != res)
1142                 {
1143                     OIC_LOG(ERROR, TAG, "update has failed");
1144                     goto exit;
1145                 }
1146             }
1147         }
1148     }
1149
1150     res = CAProcessNextStep(pdu, receivedData, blockWiseStatus, blockDataID);
1151     if (CA_STATUS_OK != res)
1152     {
1153         OIC_LOG(ERROR, TAG, "setting has failed");
1154         goto exit;
1155     }
1156
1157     CADestroyBlockID(blockDataID);
1158     return CA_STATUS_OK;
1159
1160 exit:
1161     CARemoveBlockDataFromList(blockDataID);
1162     CADestroyBlockID(blockDataID);
1163     return res;
1164 }
1165
1166 CAResult_t CAUpdateBlockOptionItems(CABlockData_t *currData, const coap_pdu_t *pdu,
1167                                     coap_block_t *block, uint16_t blockType,
1168                                     uint32_t status)
1169 {
1170     VERIFY_NON_NULL(currData, TAG, "currData");
1171     VERIFY_NON_NULL(pdu, TAG, "pdu");
1172     VERIFY_NON_NULL(block, TAG, "block");
1173
1174     // update block data
1175     CAResult_t res = CA_STATUS_OK;
1176     uint32_t code = CA_RESPONSE_CODE(pdu->transport_hdr->udp.code);
1177
1178     if (CA_REQUEST_ENTITY_INCOMPLETE == code || CA_REQUEST_ENTITY_TOO_LARGE == code)
1179     {
1180         // response error code of the received block message
1181         res = CAHandleBlockErrorResponse(block, blockType, code);
1182         if (CA_STATUS_OK != res)
1183         {
1184             OIC_LOG(ERROR, TAG, "error handle has failed");
1185             return res;
1186         }
1187     }
1188     else
1189     {
1190         // update block option items
1191         switch (status)
1192         {
1193             case CA_OPTION1_RESPONSE:
1194                 if (currData->block1.num > block->num)
1195                 {
1196                     OIC_LOG(ERROR, TAG, "received incorrect block num");
1197                     return CA_STATUS_FAILED;
1198                 }
1199                 block->num++;
1200                 break;
1201             case CA_OPTION2_REQUEST:
1202                 block->m = 0;
1203                 break;
1204             case CA_OPTION2_RESPONSE:
1205                 if (currData->block2.num > block->num)
1206                 {
1207                     OIC_LOG(ERROR, TAG, "received incorrect block num");
1208                     return CA_STATUS_FAILED;
1209                 }
1210                 block->num++;
1211                 block->m = 0;
1212                 break;
1213             case CA_BLOCK_TOO_LARGE:
1214                 // if state of received block message is CA_BLOCK_TOO_LARGE or CA_BLOCK_INCOMPLETE
1215                 // we set the response error code appropriately and send
1216                 if (COAP_OPTION_BLOCK2 == blockType)
1217                 {
1218                     block->num++;
1219                     block->m = 0;
1220                     block->szx = currData->block2.szx;
1221                 }
1222                 else
1223                 {
1224                     block->szx = currData->block1.szx;
1225                 }
1226                 break;
1227             default:
1228                 OIC_LOG_V(ERROR, TAG, "no logic [%d]", status);
1229         }
1230
1231         if (CA_BLOCK_INCOMPLETE != status && CA_BLOCK_TOO_LARGE != status)
1232         {
1233             // negotiate block size
1234             res = CANegotiateBlockSize(currData, block, pdu, blockType);
1235             if (CA_STATUS_OK != res)
1236             {
1237                 OIC_LOG(ERROR, TAG, "negotiation has failed");
1238                 return res;
1239             }
1240         }
1241     }
1242     return res;
1243 }
1244
1245 CAResult_t CASetMoreBitFromBlock(size_t payloadLen, coap_block_t *block)
1246 {
1247     VERIFY_NON_NULL(block, TAG, "block");
1248
1249     if ((size_t) ((block->num + 1) << (block->szx + BLOCK_NUMBER_IDX)) < payloadLen)
1250     {
1251         OIC_LOG(DEBUG, TAG, "Set the M-bit(1)");
1252         block->m = 1;
1253     }
1254     else
1255     {
1256         OIC_LOG(DEBUG, TAG, "Set the M-bit(0)");
1257         block->m = 0;
1258     }
1259
1260     return CA_STATUS_OK;
1261 }
1262
1263 CAResult_t CANegotiateBlockSize(CABlockData_t *currData, coap_block_t *block,
1264                                 const coap_pdu_t *pdu, uint16_t blockType)
1265 {
1266     OIC_LOG(DEBUG, TAG, "IN-NegotiateBlockSize");
1267
1268     VERIFY_NON_NULL(currData, TAG, "currData");
1269     VERIFY_NON_NULL(block, TAG, "block");
1270     VERIFY_NON_NULL(pdu, TAG, "pdu");
1271     VERIFY_NON_NULL(pdu->transport_hdr, TAG, "pdu->transport_hdr");
1272
1273     bool isReqMsg = false;
1274     uint32_t code = pdu->transport_hdr->udp.code;
1275     if (CA_GET == code || CA_POST == code || CA_PUT == code || CA_DELETE == code)
1276     {
1277         isReqMsg = true;
1278     }
1279
1280     // #1. check the block option type
1281     if (COAP_OPTION_BLOCK2 == blockType)
1282     {
1283         // #2. check the message type
1284         if (!isReqMsg)
1285         {
1286             if (block->szx > currData->block2.szx)
1287             {
1288                 OIC_LOG(DEBUG, TAG, "sze is big");
1289
1290                 // #3. calculate new block number from block size
1291                 unsigned int blockNum = BLOCK_SIZE(block->szx) /
1292                                         BLOCK_SIZE(currData->block2.szx) - 1;
1293                 OIC_LOG(DEBUG, TAG, "num is set as Negotiation");
1294                 block->num += blockNum;
1295                 block->szx = currData->block2.szx;
1296                 OIC_LOG_V(DEBUG, TAG, "updated block num: %d", block->num);
1297             }
1298         }
1299         else
1300         {
1301             if (block->szx > currData->block2.szx)
1302             {
1303                 OIC_LOG(DEBUG, TAG, "sze is big");
1304                 block->szx = currData->block2.szx;
1305             }
1306         }
1307     }
1308     else if (COAP_OPTION_BLOCK1 == blockType)
1309     {
1310         if (!isReqMsg)
1311         {
1312             if (block->szx < currData->block1.szx)
1313             {
1314                 OIC_LOG(DEBUG, TAG, "sze is small");
1315
1316                 unsigned int blockNum = BLOCK_SIZE(currData->block1.szx) /
1317                                         BLOCK_SIZE(block->szx) - 1;
1318                 block->num += blockNum;
1319                 OIC_LOG_V(DEBUG, TAG, "updated block num: %d", block->num);
1320             }
1321         }
1322         else
1323         {
1324             if (block->szx > currData->block1.szx)
1325             {
1326                 OIC_LOG(DEBUG, TAG, "sze is big");
1327                 block->szx = currData->block1.szx;
1328             }
1329         }
1330     }
1331     else
1332     {
1333         OIC_LOG(DEBUG, TAG, "Invalid block option");
1334         return CA_STATUS_FAILED;
1335     }
1336
1337     OIC_LOG(DEBUG, TAG, "OUT-NegotiateBlockSize");
1338
1339     return CA_STATUS_OK;
1340 }
1341
1342 CAResult_t CAUpdateBlockData(CABlockData_t *currData, coap_block_t block,
1343                              uint16_t blockType)
1344 {
1345     VERIFY_NON_NULL(currData, TAG, "currData");
1346
1347     // check if block size is bigger than CABlockSize_t
1348     if (block.szx > CA_BLOCK_SIZE_1024_BYTE)
1349     {
1350         OIC_LOG(DEBUG, TAG, "invalid block szx");
1351         return CA_STATUS_FAILED;
1352     }
1353
1354     // update block option
1355     if (COAP_OPTION_BLOCK2 == blockType)
1356     {
1357         currData->block2 = block;
1358     }
1359     else
1360     {
1361         currData->block1 = block;
1362     }
1363
1364     OIC_LOG(DEBUG, TAG, "data has updated");
1365     return CA_STATUS_OK;
1366 }
1367
1368 CAResult_t CAUpdateMessageId(coap_pdu_t *pdu, const CABlockDataID_t *blockID)
1369 {
1370     VERIFY_NON_NULL(pdu, TAG, "pdu");
1371     VERIFY_NON_NULL(pdu->transport_hdr, TAG, "pdu->transport_hdr");
1372     VERIFY_NON_NULL(blockID, TAG, "blockID");
1373
1374     // if message is sent, update messageId in block-wise transfer list
1375     CAData_t * cadata = CAGetDataSetFromBlockDataList(blockID);
1376     if (!cadata)
1377     {
1378         OIC_LOG(ERROR, TAG, "CAData is unavailable");
1379         return CA_STATUS_FAILED;
1380     }
1381
1382     if (cadata->requestInfo)
1383     {
1384         cadata->requestInfo->info.messageId = pdu->transport_hdr->udp.id;
1385     }
1386
1387     return CA_STATUS_OK;
1388 }
1389
1390 CAResult_t CAAddBlockOption(coap_pdu_t **pdu, const CAInfo_t *info,
1391                             const CAEndpoint_t *endpoint, coap_list_t **options)
1392 {
1393     OIC_LOG(DEBUG, TAG, "IN-AddBlockOption");
1394     VERIFY_NON_NULL(pdu, TAG, "pdu");
1395     VERIFY_NON_NULL((*pdu), TAG, "(*pdu)");
1396     VERIFY_NON_NULL((*pdu)->transport_hdr, TAG, "(*pdu)->transport_hdr");
1397     VERIFY_NON_NULL(info, TAG, "info");
1398     VERIFY_NON_NULL(endpoint, TAG, "endpoint");
1399     VERIFY_NON_NULL(options, TAG, "options");
1400
1401     CAResult_t res = CA_STATUS_OK;
1402     size_t dataLength = 0;
1403     if (info->payload)
1404     {
1405         dataLength = info->payloadSize;
1406         OIC_LOG_V(DEBUG, TAG, "dataLength - %zu", dataLength);
1407     }
1408
1409     CABlockDataID_t* blockDataID = CACreateBlockDatablockId(
1410             (CAToken_t)(*pdu)->transport_hdr->udp.token,
1411             (*pdu)->transport_hdr->udp.token_length,
1412             endpoint->port);
1413     if (NULL == blockDataID || blockDataID->idLength < 1)
1414     {
1415         OIC_LOG(ERROR, TAG, "blockId is null");
1416         res = CA_STATUS_FAILED;
1417         goto exit;
1418     }
1419
1420     uint32_t repCode = CA_RESPONSE_CODE((*pdu)->transport_hdr->udp.code);
1421     if (CA_REQUEST_ENTITY_INCOMPLETE == repCode)
1422     {
1423         OIC_LOG(INFO, TAG, "don't use option");
1424         res = CA_STATUS_OK;
1425         goto exit;
1426     }
1427
1428     uint8_t blockType = CAGetBlockOptionType(blockDataID);
1429     if (COAP_OPTION_BLOCK2 == blockType)
1430     {
1431         res = CAAddBlockOption2(pdu, info, dataLength, blockDataID, options);
1432         if (CA_STATUS_OK != res)
1433         {
1434             OIC_LOG(ERROR, TAG, "add has failed");
1435             goto exit;
1436         }
1437     }
1438     else if (COAP_OPTION_BLOCK1 == blockType)
1439     {
1440         res = CAAddBlockOption1(pdu, info, dataLength, blockDataID, options);
1441         if (CA_STATUS_OK != res)
1442         {
1443             OIC_LOG(ERROR, TAG, "add has failed");
1444             goto exit;
1445         }
1446     }
1447     else
1448     {
1449         OIC_LOG(DEBUG, TAG, "no BLOCK option");
1450
1451         // in case it is not large data, add option list to pdu.
1452         if (*options)
1453         {
1454             for (coap_list_t *opt = *options; opt; opt = opt->next)
1455             {
1456                 OIC_LOG_V(DEBUG, TAG, "[%s] opt will be added.",
1457                           COAP_OPTION_DATA(*(coap_option *) opt->data));
1458                 OIC_LOG_V(DEBUG, TAG, "[%d] pdu length", (*pdu)->length);
1459
1460                 if (0 == coap_add_option(*pdu, COAP_OPTION_KEY(*(coap_option *) opt->data),
1461                                          COAP_OPTION_LENGTH(*(coap_option *) opt->data),
1462                                          COAP_OPTION_DATA(*(coap_option *) opt->data)))
1463                 {
1464                     OIC_LOG(ERROR, TAG, "coap_add_option has failed");
1465                     res = CA_STATUS_FAILED;
1466                     goto exit;
1467                 }
1468             }
1469         }
1470         OIC_LOG_V(DEBUG, TAG, "[%d] pdu length after option", (*pdu)->length);
1471
1472         // if response data is so large. it have to send as block transfer
1473         if (!coap_add_data(*pdu, dataLength, (const unsigned char *) info->payload))
1474         {
1475             OIC_LOG(INFO, TAG, "it has to use block");
1476             res = CA_STATUS_FAILED;
1477             goto exit;
1478         }
1479         else
1480         {
1481             OIC_LOG(INFO, TAG, "not Blockwise Transfer");
1482         }
1483     }
1484
1485     uint32_t code = (*pdu)->transport_hdr->udp.code;
1486     if (CA_GET == code || CA_POST == code || CA_PUT == code || CA_DELETE == code)
1487     {
1488         // if received message type is RESET from remote device,
1489         // we have to use the updated message id of request message to find token.
1490         CABlockData_t *blockData = CAGetBlockDataFromBlockDataList(blockDataID);
1491         if (blockData)
1492         {
1493             res = CAUpdateMessageId(*pdu, blockDataID);
1494             if (CA_STATUS_OK != res)
1495             {
1496                 OIC_LOG(ERROR, TAG, "fail to update message id");
1497                 goto exit;
1498             }
1499         }
1500     }
1501
1502     CAResetBlockDataTTL(blockDataID);
1503 exit:
1504     CADestroyBlockID(blockDataID);
1505     OIC_LOG(DEBUG, TAG, "OUT-AddBlockOption");
1506     return res;
1507 }
1508
1509 CAResult_t CAAddBlockOption2(coap_pdu_t **pdu, const CAInfo_t *info, size_t dataLength,
1510                              const CABlockDataID_t *blockID, coap_list_t **options)
1511 {
1512     OIC_LOG(DEBUG, TAG, "IN-AddBlockOption2");
1513     VERIFY_NON_NULL(pdu, TAG, "pdu");
1514     VERIFY_NON_NULL((*pdu), TAG, "(*pdu)");
1515     VERIFY_NON_NULL((*pdu)->transport_hdr, TAG, "(*pdu)->transport_hdr");
1516     VERIFY_NON_NULL(info, TAG, "info");
1517     VERIFY_NON_NULL(blockID, TAG, "blockID");
1518     VERIFY_NON_NULL(options, TAG, "options");
1519
1520     // get set block data from CABlock list-set.
1521     coap_block_t *block1 = CAGetBlockOption(blockID, COAP_OPTION_BLOCK1);
1522     coap_block_t *block2 = CAGetBlockOption(blockID, COAP_OPTION_BLOCK2);
1523     if (!block1 || !block2)
1524     {
1525         OIC_LOG(ERROR, TAG, "getting has failed");
1526         return CA_STATUS_FAILED;
1527     }
1528
1529     CAResult_t res = CA_STATUS_OK;
1530     uint32_t code = (*pdu)->transport_hdr->udp.code;
1531     if (CA_GET != code && CA_POST != code && CA_PUT != code && CA_DELETE != code)
1532     {
1533         CASetMoreBitFromBlock(dataLength, block2);
1534
1535         // if block number is 0, add size2 option
1536         if (0 == block2->num)
1537         {
1538             res = CAAddBlockSizeOption(*pdu, COAP_OPTION_SIZE2, dataLength, options);
1539             if (CA_STATUS_OK != res)
1540             {
1541                 OIC_LOG(ERROR, TAG, "add has failed");
1542                 goto exit;
1543             }
1544         }
1545
1546         res = CAAddBlockOptionImpl(block2, COAP_OPTION_BLOCK2, options);
1547         if (CA_STATUS_OK != res)
1548         {
1549             OIC_LOG(ERROR, TAG, "add has failed");
1550             goto exit;
1551         }
1552
1553         if (block1->num)
1554         {
1555             OIC_LOG(DEBUG, TAG, "combining block1 and block2");
1556             res = CAAddBlockOptionImpl(block1, COAP_OPTION_BLOCK1, options);
1557             if (CA_STATUS_OK != res)
1558             {
1559                 OIC_LOG(ERROR, TAG, "add has failed");
1560                 goto exit;
1561             }
1562             // initialize block number
1563             block1->num = 0;
1564         }
1565
1566         res = CAAddOptionToPDU(*pdu, options);
1567         if (CA_STATUS_OK != res)
1568         {
1569             OIC_LOG(ERROR, TAG, "add has failed");
1570             goto exit;
1571         }
1572
1573         if (!coap_add_block(*pdu, dataLength, (const unsigned char *) info->payload,
1574                             block2->num, block2->szx))
1575         {
1576             OIC_LOG(ERROR, TAG, "Data length is smaller than the start index");
1577             return CA_STATUS_FAILED;
1578         }
1579
1580         CALogBlockInfo(block2);
1581
1582         if (!block2->m)
1583         {
1584             // if sent message is last response block message, remove data
1585             CARemoveBlockDataFromList(blockID);
1586         }
1587     }
1588     else
1589     {
1590         OIC_LOG(DEBUG, TAG, "option2, not response msg");
1591         res = CAAddBlockOptionImpl(block2, COAP_OPTION_BLOCK2, options);
1592         if (CA_STATUS_OK != res)
1593         {
1594             OIC_LOG(ERROR, TAG, "add has failed");
1595             goto exit;
1596         }
1597
1598         res = CAAddOptionToPDU(*pdu, options);
1599         if (CA_STATUS_OK != res)
1600         {
1601             OIC_LOG(ERROR, TAG, "add has failed");
1602             goto exit;
1603         }
1604         CALogBlockInfo(block2);
1605     }
1606
1607     return CA_STATUS_OK;
1608
1609 exit:
1610     CARemoveBlockDataFromList(blockID);
1611     return res;
1612 }
1613
1614 CAResult_t CAAddBlockOption1(coap_pdu_t **pdu, const CAInfo_t *info, size_t dataLength,
1615                              const CABlockDataID_t *blockID, coap_list_t **options)
1616 {
1617     OIC_LOG(DEBUG, TAG, "IN-AddBlockOption1");
1618     VERIFY_NON_NULL(pdu, TAG, "pdu");
1619     VERIFY_NON_NULL((*pdu), TAG, "(*pdu)");
1620     VERIFY_NON_NULL((*pdu)->transport_hdr, TAG, "(*pdu)->transport_hdr");
1621     VERIFY_NON_NULL(info, TAG, "info");
1622     VERIFY_NON_NULL(blockID, TAG, "blockID");
1623     VERIFY_NON_NULL(options, TAG, "options");
1624
1625     // get set block data from CABlock list-set.
1626     coap_block_t *block1 = CAGetBlockOption(blockID, COAP_OPTION_BLOCK1);
1627     if (!block1)
1628     {
1629         OIC_LOG(ERROR, TAG, "getting has failed");
1630         return CA_STATUS_FAILED;
1631     }
1632
1633     CAResult_t res = CA_STATUS_OK;
1634     uint32_t code = (*pdu)->transport_hdr->udp.code;
1635     if (CA_GET == code || CA_POST == code || CA_PUT == code || CA_DELETE == code)
1636     {
1637         CASetMoreBitFromBlock(dataLength, block1);
1638
1639         // if block number is 0, add size1 option
1640         if (0 == block1->num)
1641         {
1642             res = CAAddBlockSizeOption(*pdu, COAP_OPTION_SIZE1, dataLength, options);
1643             if (CA_STATUS_OK != res)
1644             {
1645                 OIC_LOG(ERROR, TAG, "add has failed");
1646                 goto exit;
1647             }
1648         }
1649
1650         // add block option to option list.
1651         res = CAAddBlockOptionImpl(block1, COAP_OPTION_BLOCK1, options);
1652         if (CA_STATUS_OK != res)
1653         {
1654             OIC_LOG(ERROR, TAG, "add has failed");
1655             goto exit;
1656         }
1657
1658         // add option list to pdu.
1659         res = CAAddOptionToPDU(*pdu, options);
1660         if (CA_STATUS_OK != res)
1661         {
1662             OIC_LOG(ERROR, TAG, "add has failed");
1663             goto exit;
1664         }
1665
1666         // add the payload data as the block size.
1667         if (!coap_add_block(*pdu, dataLength, (const unsigned char *) info->payload, block1->num,
1668                             block1->szx))
1669         {
1670             OIC_LOG(ERROR, TAG, "Data length is smaller than the start index");
1671             return CA_STATUS_FAILED;
1672         }
1673     }
1674     else
1675     {
1676         OIC_LOG(DEBUG, TAG, "received response message with block option1");
1677
1678         // add block option to option list.
1679         res = CAAddBlockOptionImpl(block1, COAP_OPTION_BLOCK1, options);
1680         if (CA_STATUS_OK != res)
1681         {
1682             OIC_LOG(ERROR, TAG, "add has failed");
1683             goto exit;
1684         }
1685
1686         // add option list to pdu.
1687         res = CAAddOptionToPDU(*pdu, options);
1688         if (CA_STATUS_OK != res)
1689         {
1690             OIC_LOG(ERROR, TAG, "add has failed");
1691             goto exit;
1692         }
1693
1694         // add the payload data as the block size.
1695         if (!coap_add_data(*pdu, dataLength, (const unsigned char *) info->payload))
1696         {
1697             OIC_LOG(ERROR, TAG, "failed to add payload");
1698             return CA_STATUS_FAILED;
1699         }
1700
1701         // if it is last block message, remove block data from list.
1702         if (0 == block1->m)
1703         {
1704             // remove data from list
1705             res = CARemoveBlockDataFromList(blockID);
1706             if (CA_STATUS_OK != res)
1707             {
1708                 OIC_LOG(ERROR, TAG, "remove has failed");
1709                 return res;
1710             }
1711         }
1712     }
1713
1714     CALogBlockInfo(block1);
1715
1716     OIC_LOG(DEBUG, TAG, "OUT-AddBlockOption1");
1717
1718     return CA_STATUS_OK;
1719
1720 exit:
1721     CARemoveBlockDataFromList(blockID);
1722     return res;
1723 }
1724
1725 CAResult_t CAAddBlockOptionImpl(coap_block_t *block, uint8_t blockType,
1726                                 coap_list_t **options)
1727 {
1728     OIC_LOG(DEBUG, TAG, "IN-AddBlockOptionImpl");
1729     VERIFY_NON_NULL(block, TAG, "block");
1730     VERIFY_NON_NULL(options, TAG, "options");
1731
1732     unsigned char buf[BLOCKWISE_OPTION_BUFFER] = { 0 };
1733     unsigned int optionLength = coap_encode_var_bytes(buf,
1734                                                       ((block->num << BLOCK_NUMBER_IDX)
1735                                                        | (block->m << BLOCK_M_BIT_IDX)
1736                                                        | block->szx));
1737
1738     int ret = coap_insert(options,
1739                           CACreateNewOptionNode(blockType, optionLength, (char *) buf),
1740                           CAOrderOpts);
1741     if (ret <= 0)
1742     {
1743         return CA_STATUS_INVALID_PARAM;
1744     }
1745
1746     OIC_LOG(DEBUG, TAG, "OUT-AddBlockOptionImpl");
1747     return CA_STATUS_OK;
1748 }
1749
1750 CAResult_t CAAddOptionToPDU(coap_pdu_t *pdu, coap_list_t **options)
1751 {
1752     // after adding the block option to option list, add option list to pdu.
1753     if (*options)
1754     {
1755         for (coap_list_t *opt = *options; opt; opt = opt->next)
1756         {
1757             OIC_LOG_V(DEBUG, TAG, "[%s] opt will be added.",
1758                       COAP_OPTION_DATA(*(coap_option *) opt->data));
1759
1760             OIC_LOG_V(DEBUG, TAG, "[%d] pdu length", pdu->length);
1761             int ret = coap_add_option(pdu, COAP_OPTION_KEY(*(coap_option *) opt->data),
1762                                       COAP_OPTION_LENGTH(*(coap_option *) opt->data),
1763                                       COAP_OPTION_DATA(*(coap_option *) opt->data));
1764             if (!ret)
1765             {
1766                 return CA_STATUS_FAILED;
1767             }
1768         }
1769     }
1770
1771     OIC_LOG_V(DEBUG, TAG, "[%d] pdu length after option", pdu->length);
1772
1773     return CA_STATUS_OK;
1774 }
1775
1776 CAResult_t CAAddBlockSizeOption(coap_pdu_t *pdu, uint16_t sizeType, size_t dataLength,
1777                                 coap_list_t **options)
1778 {
1779     OIC_LOG(DEBUG, TAG, "IN-CAAddBlockSizeOption");
1780     VERIFY_NON_NULL(pdu, TAG, "pdu");
1781     VERIFY_NON_NULL(options, TAG, "options");
1782
1783     if (sizeType != COAP_OPTION_SIZE1 && sizeType != COAP_OPTION_SIZE2)
1784     {
1785         OIC_LOG(ERROR, TAG, "unknown option type");
1786         return CA_STATUS_FAILED;
1787     }
1788
1789     unsigned char value[BLOCKWISE_OPTION_BUFFER] = { 0 };
1790     unsigned int optionLength = coap_encode_var_bytes(value, dataLength);
1791
1792     int ret = coap_insert(options,
1793                           CACreateNewOptionNode(sizeType, optionLength, (char *) value),
1794                           CAOrderOpts);
1795     if (ret <= 0)
1796     {
1797         return CA_STATUS_INVALID_PARAM;
1798     }
1799
1800     OIC_LOG(DEBUG, TAG, "OUT-CAAddBlockSizeOption");
1801
1802     return CA_STATUS_OK;
1803 }
1804
1805 // TODO make pdu const after libcoap is updated to support that.
1806 bool CAIsPayloadLengthInPduWithBlockSizeOption(coap_pdu_t *pdu,
1807                                                uint16_t sizeType,
1808                                                size_t *totalPayloadLen)
1809 {
1810     OIC_LOG(DEBUG, TAG, "IN-CAIsPayloadLengthInPduWithBlockSizeOption");
1811     VERIFY_NON_NULL(pdu, TAG, "pdu");
1812     VERIFY_NON_NULL(totalPayloadLen, TAG, "totalPayloadLen");
1813
1814     if (sizeType != COAP_OPTION_SIZE1 && sizeType != COAP_OPTION_SIZE2)
1815     {
1816         OIC_LOG(ERROR, TAG, "unknown option type");
1817         return CA_STATUS_FAILED;
1818     }
1819
1820     coap_opt_iterator_t opt_iter;
1821     coap_opt_t *option = coap_check_option(pdu, sizeType, &opt_iter);
1822     if (option)
1823     {
1824         OIC_LOG(DEBUG, TAG, "get size option from pdu");
1825         *totalPayloadLen = coap_decode_var_bytes(COAP_OPT_VALUE(option),
1826                                                  COAP_OPT_LENGTH(option));
1827
1828         OIC_LOG_V(DEBUG, TAG, "the total payload length to be received is [%zu]bytes",
1829                   *totalPayloadLen);
1830
1831         return true;
1832     }
1833
1834     OIC_LOG(DEBUG, TAG, "OUT-CAIsPayloadLengthInPduWithBlockSizeOption");
1835
1836     return false;
1837 }
1838
1839 uint8_t CACheckBlockErrorType(CABlockData_t *currData, coap_block_t *receivedBlock,
1840                               const CAData_t *receivedData, uint16_t blockType,
1841                               size_t dataLen)
1842 {
1843     OIC_LOG(DEBUG, TAG, "IN-CheckBlockError");
1844
1845     VERIFY_NON_NULL(currData, TAG, "currData is NULL");
1846     VERIFY_NON_NULL(receivedBlock, TAG, "receivedBlock is NULL");
1847     VERIFY_NON_NULL(receivedData, TAG, "receivedData is NULL");
1848
1849     // #1. check the received payload length
1850     size_t blockPayloadLen = 0;
1851     CAGetPayloadInfo(receivedData, &blockPayloadLen);
1852
1853     // #2. check if the block sequence is right
1854     if (COAP_OPTION_BLOCK1 == blockType)
1855     {
1856         size_t prePayloadLen = currData->receivedPayloadLen;
1857         if (prePayloadLen != (size_t) BLOCK_SIZE(receivedBlock->szx) * receivedBlock->num)
1858         {
1859             if (receivedBlock->num > currData->block1.num + 1)
1860             {
1861                 // 408 Error handling of block loss
1862                 OIC_LOG(ERROR, TAG, "option1: error 4.08");
1863                 OIC_LOG(ERROR, TAG, "it didn't order");
1864                 return CA_BLOCK_INCOMPLETE;
1865             }
1866             return CA_BLOCK_RECEIVED_ALREADY;
1867         }
1868     }
1869     else if (COAP_OPTION_BLOCK2 == blockType)
1870     {
1871         if (receivedBlock->num != currData->block2.num)
1872         {
1873             if (receivedBlock->num > currData->block2.num)
1874             {
1875                 // 408 Error handling of block loss
1876                 OIC_LOG(ERROR, TAG, "option2: error 4.08");
1877                 OIC_LOG(ERROR, TAG, "it didn't order");
1878                 return CA_BLOCK_INCOMPLETE;
1879             }
1880             else
1881             {
1882                 OIC_LOG(ERROR, TAG, "already received this block");
1883                 return CA_BLOCK_RECEIVED_ALREADY;
1884             }
1885         }
1886     }
1887
1888     // #3. check if error check logic is required
1889     size_t optionLen = dataLen - blockPayloadLen;
1890     if (receivedBlock->m && blockPayloadLen != (size_t) BLOCK_SIZE(receivedBlock->szx))
1891     {
1892         // 413 Error handling of too large entity
1893         if (COAP_MAX_PDU_SIZE < BLOCK_SIZE(receivedBlock->szx) + optionLen)
1894         {
1895             // buffer size is smaller than received block size
1896             OIC_LOG(ERROR, TAG, "error type 4.13");
1897             OIC_LOG(ERROR, TAG, "too large size");
1898
1899             // set the block size to be smaller than COAP_MAX_PDU_SIZE
1900             for (int32_t size = CA_DEFAULT_BLOCK_SIZE; size >= 0; size--)
1901             {
1902                 if (COAP_MAX_PDU_SIZE >= BLOCK_SIZE(size) + optionLen)
1903                 {
1904                     OIC_LOG_V(ERROR, TAG, "replace sze with %d", size);
1905                     currData->block2.szx = size;
1906                     currData->block1.szx = size;
1907                     break;
1908                 }
1909             }
1910             return CA_BLOCK_TOO_LARGE;
1911         }
1912         else
1913         {
1914             // 408 Error handling of payload loss
1915             OIC_LOG(ERROR, TAG, "error type 4.08");
1916             OIC_LOG(ERROR, TAG, "payload len != block sze");
1917             return CA_BLOCK_INCOMPLETE;
1918         }
1919     }
1920     else if (0 == receivedBlock->m && 0 != currData->payloadLength)
1921     {
1922         // if the received block is last block, check the total payload length
1923         size_t receivedPayloadLen = currData->receivedPayloadLen;
1924         receivedPayloadLen += blockPayloadLen;
1925
1926         if (receivedPayloadLen != currData->payloadLength)
1927         {
1928             OIC_LOG(ERROR, TAG, "error type 4.08");
1929             OIC_LOG(ERROR, TAG, "total payload length is wrong");
1930             return CA_BLOCK_INCOMPLETE;
1931         }
1932     }
1933
1934     OIC_LOG(DEBUG, TAG, "received all data normally");
1935
1936     OIC_LOG(DEBUG, TAG, "OUT-CheckBlockError");
1937
1938     return CA_BLOCK_UNKNOWN;
1939 }
1940
1941 CAResult_t CAUpdatePayloadData(CABlockData_t *currData, const CAData_t *receivedData,
1942                                uint8_t status, bool isSizeOption, uint16_t blockType)
1943 {
1944     OIC_LOG(DEBUG, TAG, "IN-UpdatePayloadData");
1945
1946     VERIFY_NON_NULL(currData, TAG, "currData");
1947     VERIFY_NON_NULL(receivedData, TAG, "receivedData");
1948
1949     // if error code is 4.08, do not update payload
1950     if (CA_BLOCK_INCOMPLETE == status)
1951     {
1952         OIC_LOG(ERROR, TAG, "no require to update");
1953         return CA_STATUS_OK;
1954     }
1955
1956     size_t blockPayloadLen = 0;
1957     CAPayload_t blockPayload = CAGetPayloadInfo(receivedData, &blockPayloadLen);
1958
1959     if (CA_BLOCK_TOO_LARGE == status)
1960     {
1961         blockPayloadLen = (COAP_OPTION_BLOCK2 == blockType) ?
1962                 BLOCK_SIZE(currData->block2.szx) : BLOCK_SIZE(currData->block1.szx);
1963     }
1964
1965     // memory allocation for the received block payload
1966     size_t prePayloadLen = currData->receivedPayloadLen;
1967     if (blockPayload)
1968     {
1969         if (currData->payloadLength)
1970         {
1971             // in case the block message has the size option
1972             // allocate the memory for the total payload
1973             if (isSizeOption)
1974             {
1975                 CAPayload_t prePayload = currData->payload;
1976
1977                 OIC_LOG(DEBUG, TAG, "allocate memory for the total payload");
1978                 currData->payload = (CAPayload_t) OICCalloc(1, currData->payloadLength);
1979                 if (NULL == currData->payload)
1980                 {
1981                     OIC_LOG(ERROR, TAG, "out of memory");
1982                     return CA_MEMORY_ALLOC_FAILED;
1983                 }
1984                 memcpy(currData->payload, prePayload, prePayloadLen);
1985                 OICFree(prePayload);
1986             }
1987
1988             // update the total payload
1989             memcpy(currData->payload + prePayloadLen, blockPayload, blockPayloadLen);
1990         }
1991         else
1992         {
1993             OIC_LOG(DEBUG, TAG, "allocate memory for the received block payload");
1994
1995             size_t totalPayloadLen = prePayloadLen + blockPayloadLen;
1996             CAPayload_t newPayload = OICRealloc(currData->payload, totalPayloadLen);
1997             if (NULL == newPayload)
1998             {
1999                 OIC_LOG(ERROR, TAG, "out of memory");
2000                 return CA_MEMORY_ALLOC_FAILED;
2001             }
2002
2003             // update the total payload
2004             memset(newPayload + prePayloadLen, 0, blockPayloadLen);
2005             currData->payload = newPayload;
2006             memcpy(currData->payload + prePayloadLen, blockPayload, blockPayloadLen);
2007         }
2008
2009         // update received payload length
2010         currData->receivedPayloadLen += blockPayloadLen;
2011
2012         OIC_LOG_V(DEBUG, TAG, "updated payload: %s, len: %zu", currData->payload,
2013                   currData->receivedPayloadLen);
2014     }
2015
2016     OIC_LOG(DEBUG, TAG, "OUT-UpdatePayloadData");
2017     return CA_STATUS_OK;
2018 }
2019
2020 CAData_t* CACreateNewDataSet(const coap_pdu_t *pdu, const CAEndpoint_t *endpoint)
2021 {
2022     VERIFY_NON_NULL_RET(pdu, TAG, "pdu", NULL);
2023     VERIFY_NON_NULL_RET(pdu->transport_hdr, TAG, "pdu->transport_hdr", NULL);
2024     VERIFY_NON_NULL_RET(endpoint, TAG, "endpoint", NULL);
2025
2026     CARequestInfo_t* requestInfo = NULL;
2027     CAResponseInfo_t* responseInfo = NULL;
2028
2029     uint32_t code = pdu->transport_hdr->udp.code;
2030     if (CA_GET == code || CA_POST == code || CA_PUT == code || CA_DELETE == code)
2031     {
2032         CAInfo_t responseData = { .tokenLength = pdu->transport_hdr->udp.token_length };
2033         responseData.token = (CAToken_t) OICMalloc(responseData.tokenLength);
2034         if (!responseData.token)
2035         {
2036             OIC_LOG(ERROR, TAG, "out of memory");
2037             return NULL;
2038         }
2039         memcpy(responseData.token, pdu->transport_hdr->udp.token, responseData.tokenLength);
2040
2041         responseInfo = (CAResponseInfo_t*) OICCalloc(1, sizeof(CAResponseInfo_t));
2042         if (!responseInfo)
2043         {
2044             OIC_LOG(ERROR, TAG, "out of memory");
2045             OICFree(responseData.token);
2046             return NULL;
2047         }
2048         responseInfo->info = responseData;
2049     }
2050     else
2051     {
2052         CAInfo_t requestData = { .tokenLength = pdu->transport_hdr->udp.token_length };
2053         requestData.token = (CAToken_t) OICMalloc(requestData.tokenLength);
2054         if (!requestData.token)
2055         {
2056             OIC_LOG(ERROR, TAG, "out of memory");
2057             return NULL;
2058         }
2059         memcpy(requestData.token, pdu->transport_hdr->udp.token, requestData.tokenLength);
2060
2061         requestInfo = (CARequestInfo_t*) OICCalloc(1, sizeof(CARequestInfo_t));
2062         if (!requestInfo)
2063         {
2064             OIC_LOG(ERROR, TAG, "out of memory");
2065             OICFree(requestData.token);
2066             return NULL;
2067         }
2068         requestInfo->info = requestData;
2069
2070         // get resource uri information from received response message
2071         // to send next request message to remote device
2072         CAResponseInfo_t* resInfo = (CAResponseInfo_t*)OICCalloc(1, sizeof(*resInfo));
2073         if (!resInfo)
2074         {
2075             OIC_LOG(ERROR, TAG, "memory allocation failed");
2076             OICFree(requestData.token);
2077             OICFree(requestInfo);
2078             return NULL;
2079         }
2080
2081         CAGetResponseInfoFromPDU(pdu, resInfo, endpoint);
2082         requestInfo->method = CA_GET;
2083         requestInfo->info.messageId = CAGetMessageIdFromPduBinaryData(pdu->transport_hdr,
2084                                                                       pdu->length);
2085         requestInfo->info.resourceUri = OICStrdup(resInfo->info.resourceUri);
2086
2087         // after copying the resource uri, destroy response info.
2088         CADestroyResponseInfoInternal(resInfo);
2089     }
2090
2091     CAData_t *data = (CAData_t *) OICCalloc(1, sizeof(CAData_t));
2092     if (!data)
2093     {
2094         OIC_LOG(ERROR, TAG, "out of memory");
2095         if (NULL != requestInfo)
2096         {
2097             OICFree(requestInfo->info.resourceUri);
2098             OICFree(requestInfo->info.token);
2099             OICFree(requestInfo);
2100         }
2101         if (NULL != responseInfo)
2102         {
2103             OICFree(responseInfo->info.token);
2104             OICFree(responseInfo);
2105         }
2106         return NULL;
2107     }
2108
2109     data->requestInfo = requestInfo;
2110     data->responseInfo = responseInfo;
2111     data->remoteEndpoint = CACloneEndpoint(endpoint);
2112     data->type = SEND_TYPE_UNICAST;
2113
2114     return data;
2115 }
2116
2117 CAData_t *CACloneCAData(const CAData_t *data)
2118 {
2119     VERIFY_NON_NULL_RET(data, TAG, "data", NULL);
2120
2121     CAData_t *clone = (CAData_t *) OICCalloc(1, sizeof(CAData_t));
2122     if (!clone)
2123     {
2124         OIC_LOG(ERROR, TAG, "out of memory");
2125         return NULL;
2126     }
2127     *clone = *data;
2128
2129     if (data->requestInfo)
2130     {
2131         clone->requestInfo = CACloneRequestInfo(data->requestInfo);
2132     }
2133     else if (data->responseInfo)
2134     {
2135         clone->responseInfo = CACloneResponseInfo(data->responseInfo);
2136     }
2137
2138     if (data->remoteEndpoint)
2139     {
2140         clone->remoteEndpoint = CACloneEndpoint(data->remoteEndpoint);
2141     }
2142
2143     return clone;
2144 }
2145
2146 CAResult_t CAUpdatePayloadToCAData(CAData_t *data, const CAPayload_t payload,
2147                                    size_t payloadLen)
2148 {
2149     OIC_LOG(DEBUG, TAG, "IN-UpdatePayload");
2150
2151     VERIFY_NON_NULL(data, TAG, "data is NULL");
2152     VERIFY_NON_NULL(payload, TAG, "payload is NULL");
2153
2154     CAPayload_t newPayload = NULL;
2155     switch (data->dataType)
2156     {
2157         case CA_REQUEST_DATA:
2158             if (!data->requestInfo)
2159             {
2160                 OIC_LOG(ERROR, TAG, "request info is null");
2161                 return CA_STATUS_FAILED;
2162             }
2163             // allocate payload field
2164             newPayload = OICRealloc(data->requestInfo->info.payload, payloadLen);
2165             if (!newPayload)
2166             {
2167                 OIC_LOG(ERROR, TAG, "out of memory");
2168                 return CA_STATUS_FAILED;
2169             }
2170             data->requestInfo->info.payload = newPayload;
2171             memcpy(data->requestInfo->info.payload, payload, payloadLen);
2172             data->requestInfo->info.payloadSize = payloadLen;
2173             break;
2174
2175         case CA_RESPONSE_DATA:
2176             if (!data->responseInfo)
2177             {
2178                 OIC_LOG(ERROR, TAG, "response info is null");
2179                 return CA_STATUS_FAILED;
2180             }
2181             // allocate payload field
2182             newPayload = OICRealloc(data->responseInfo->info.payload, payloadLen);
2183             if (!newPayload)
2184             {
2185                 OIC_LOG(ERROR, TAG, "out of memory");
2186                 return CA_STATUS_FAILED;
2187             }
2188             data->responseInfo->info.payload = newPayload;
2189             memcpy(data->responseInfo->info.payload, payload, payloadLen);
2190             data->responseInfo->info.payloadSize = payloadLen;
2191             break;
2192
2193         default:
2194             // does not occur case
2195             OIC_LOG(ERROR, TAG, "not supported data type");
2196             return CA_NOT_SUPPORTED;
2197     }
2198
2199     OIC_LOG(DEBUG, TAG, "OUT-UpdatePayload");
2200
2201     return CA_STATUS_OK;
2202 }
2203
2204 CAPayload_t CAGetPayloadInfo(const CAData_t *data, size_t *payloadLen)
2205 {
2206     VERIFY_NON_NULL_RET(data, TAG, "data", NULL);
2207     VERIFY_NON_NULL_RET(payloadLen, TAG, "payloadLen", NULL);
2208
2209     if (data->requestInfo)
2210     {
2211         if (data->requestInfo->info.payload)
2212         {
2213             *payloadLen = data->requestInfo->info.payloadSize;
2214             return data->requestInfo->info.payload;
2215         }
2216     }
2217     else if (data->responseInfo)
2218     {
2219         if (data->responseInfo->info.payload)
2220         {
2221             *payloadLen = data->responseInfo->info.payloadSize;
2222             return data->responseInfo->info.payload;
2223         }
2224     }
2225
2226     return NULL;
2227 }
2228
2229 CAResult_t CAHandleBlockErrorResponse(coap_block_t *block, uint16_t blockType,
2230                                       uint32_t responseResult)
2231 {
2232     OIC_LOG(DEBUG, TAG, "IN-HandleBlockErrorRes");
2233     VERIFY_NON_NULL(block, TAG, "block is NULL");
2234
2235     // update block data
2236     switch (responseResult)
2237     {
2238         case CA_REQUEST_ENTITY_INCOMPLETE:
2239             block->num = 0;
2240             break;
2241         case CA_REQUEST_ENTITY_TOO_LARGE:
2242             if (COAP_OPTION_BLOCK1 == blockType)
2243             {
2244                 block->num++;
2245             }
2246             block->m = 0;
2247             break;
2248         default:
2249             OIC_LOG_V(ERROR, TAG, "there is no Error Code of BWT[%d]", responseResult);
2250             return CA_STATUS_FAILED;
2251     }
2252
2253     OIC_LOG(DEBUG, TAG, "OUT-HandleBlockErrorRes");
2254     return CA_STATUS_OK;
2255 }
2256
2257 CAResult_t CAUpdateBlockOptionType(const CABlockDataID_t *blockID, uint8_t blockType)
2258 {
2259     OIC_LOG(DEBUG, TAG, "IN-UpdateBlockOptionType");
2260     VERIFY_NON_NULL(blockID, TAG, "blockID");
2261
2262     oc_mutex_lock(g_context.blockDataListMutex);
2263
2264     size_t len = u_arraylist_length(g_context.dataList);
2265     for (size_t i = 0; i < len; i++)
2266     {
2267         CABlockData_t *currData = (CABlockData_t *) u_arraylist_get(g_context.dataList, i);
2268         if (CABlockidMatches(currData, blockID))
2269         {
2270             currData->type = blockType;
2271             oc_mutex_unlock(g_context.blockDataListMutex);
2272             OIC_LOG(DEBUG, TAG, "OUT-UpdateBlockOptionType");
2273             return CA_STATUS_OK;
2274         }
2275     }
2276     oc_mutex_unlock(g_context.blockDataListMutex);
2277
2278     OIC_LOG(DEBUG, TAG, "OUT-UpdateBlockOptionType");
2279     return CA_STATUS_FAILED;
2280 }
2281
2282 uint8_t CAGetBlockOptionType(const CABlockDataID_t *blockID)
2283 {
2284     OIC_LOG(DEBUG, TAG, "IN-GetBlockOptionType");
2285     VERIFY_NON_NULL_RET(blockID, TAG, "blockID", 0);
2286
2287     oc_mutex_lock(g_context.blockDataListMutex);
2288
2289     size_t len = u_arraylist_length(g_context.dataList);
2290     for (size_t i = 0; i < len; i++)
2291     {
2292         CABlockData_t *currData = (CABlockData_t *) u_arraylist_get(g_context.dataList, i);
2293         if (CABlockidMatches(currData, blockID))
2294         {
2295             oc_mutex_unlock(g_context.blockDataListMutex);
2296             OIC_LOG(DEBUG, TAG, "OUT-GetBlockOptionType");
2297             return currData->type;
2298         }
2299     }
2300     oc_mutex_unlock(g_context.blockDataListMutex);
2301
2302     OIC_LOG(DEBUG, TAG, "OUT-GetBlockOptionType");
2303     return 0;
2304 }
2305
2306 CAData_t *CAGetDataSetFromBlockDataList(const CABlockDataID_t *blockID)
2307 {
2308     VERIFY_NON_NULL_RET(blockID, TAG, "blockID", NULL);
2309
2310     oc_mutex_lock(g_context.blockDataListMutex);
2311
2312     size_t len = u_arraylist_length(g_context.dataList);
2313     for (size_t i = 0; i < len; i++)
2314     {
2315         CABlockData_t *currData = (CABlockData_t *) u_arraylist_get(g_context.dataList, i);
2316         if (CABlockidMatches(currData, blockID))
2317         {
2318             oc_mutex_unlock(g_context.blockDataListMutex);
2319             return currData->sentData;
2320         }
2321     }
2322     oc_mutex_unlock(g_context.blockDataListMutex);
2323
2324     return NULL;
2325 }
2326
2327 CABlockData_t *CAUpdateDataSetFromBlockDataList(const CABlockDataID_t *blockID,
2328                                                 const CAData_t *sendData)
2329 {
2330     VERIFY_NON_NULL_RET(blockID, TAG, "blockID", NULL);
2331     VERIFY_NON_NULL_RET(sendData, TAG, "sendData", NULL);
2332
2333     oc_mutex_lock(g_context.blockDataListMutex);
2334
2335     size_t len = u_arraylist_length(g_context.dataList);
2336     for (size_t i = 0; i < len; i++)
2337     {
2338         CABlockData_t *currData = (CABlockData_t *) u_arraylist_get(g_context.dataList, i);
2339         if (CABlockidMatches(currData, blockID))
2340         {
2341             CADestroyDataSet(currData->sentData);
2342             currData->sentData = CACloneCAData(sendData);
2343             oc_mutex_unlock(g_context.blockDataListMutex);
2344             return currData;
2345         }
2346     }
2347     oc_mutex_unlock(g_context.blockDataListMutex);
2348
2349     return NULL;
2350 }
2351
2352 CAResult_t CAGetTokenFromBlockDataList(const coap_pdu_t *pdu, const CAEndpoint_t *endpoint,
2353                                        CAResponseInfo_t *responseInfo)
2354 {
2355     OIC_LOG(DEBUG, TAG, "IN-CAGetTokenFromBlockDataList");
2356     VERIFY_NON_NULL(pdu, TAG, "pdu");
2357     VERIFY_NON_NULL(endpoint, TAG, "endpoint");
2358     VERIFY_NON_NULL(responseInfo, TAG, "responseInfo");
2359
2360     oc_mutex_lock(g_context.blockDataListMutex);
2361
2362     size_t len = u_arraylist_length(g_context.dataList);
2363     for (size_t i = 0; i < len; i++)
2364     {
2365         CABlockData_t *currData = (CABlockData_t *) u_arraylist_get(g_context.dataList, i);
2366         if (NULL == currData)
2367         {
2368             continue;
2369         }
2370
2371         if (NULL != currData->sentData && NULL != currData->sentData->requestInfo)
2372         {
2373             if (pdu->transport_hdr->udp.id == currData->sentData->requestInfo->info.messageId &&
2374                     endpoint->adapter == currData->sentData->remoteEndpoint->adapter)
2375             {
2376                 if (NULL != currData->sentData->requestInfo->info.token)
2377                 {
2378                     uint8_t length = currData->sentData->requestInfo->info.tokenLength;
2379                     responseInfo->info.tokenLength = length;
2380                     responseInfo->info.token = (char *) OICMalloc(length);
2381                     if (NULL == responseInfo->info.token)
2382                     {
2383                         OIC_LOG(ERROR, TAG, "out of memory");
2384                         oc_mutex_unlock(g_context.blockDataListMutex);
2385                         return CA_MEMORY_ALLOC_FAILED;
2386                     }
2387                     memcpy(responseInfo->info.token, currData->sentData->requestInfo->info.token,
2388                            responseInfo->info.tokenLength);
2389
2390                     oc_mutex_unlock(g_context.blockDataListMutex);
2391                     OIC_LOG(DEBUG, TAG, "OUT-CAGetTokenFromBlockDataList");
2392                     return CA_STATUS_OK;
2393                 }
2394             }
2395         }
2396     }
2397
2398     oc_mutex_unlock(g_context.blockDataListMutex);
2399
2400     OIC_LOG(DEBUG, TAG, "OUT-CAGetTokenFromBlockDataList");
2401     return CA_STATUS_FAILED;
2402 }
2403
2404 CAResult_t CACheckBlockDataValidation(const CAData_t *sendData, CABlockData_t **blockData)
2405 {
2406     VERIFY_NON_NULL(sendData, TAG, "sendData");
2407     VERIFY_NON_NULL(blockData, TAG, "blockData");
2408
2409     if (sendData->responseInfo)
2410     {
2411         CABlockDataID_t* blockDataID = CACreateBlockDatablockId(
2412                 (CAToken_t)sendData->responseInfo->info.token,
2413                 sendData->responseInfo->info.tokenLength,
2414                 sendData->remoteEndpoint->port);
2415         if (NULL == blockDataID || blockDataID->idLength < 1)
2416         {
2417             OIC_LOG(ERROR, TAG, "blockId is null");
2418             CADestroyBlockID(blockDataID);
2419             return CA_STATUS_FAILED;
2420         }
2421
2422         CABlockData_t *updatedData = CAUpdateDataSetFromBlockDataList(blockDataID, sendData);
2423         if (updatedData)
2424         {
2425             OIC_LOG(DEBUG, TAG, "Send response about the received block request.");
2426             *blockData = updatedData;
2427             CADestroyBlockID(blockDataID);
2428             return CA_STATUS_OK;
2429         }
2430         CADestroyBlockID(blockDataID);
2431     }
2432
2433     return CA_STATUS_FAILED;
2434 }
2435
2436 CABlockData_t *CAGetBlockDataFromBlockDataList(const CABlockDataID_t *blockID)
2437 {
2438     VERIFY_NON_NULL_RET(blockID, TAG, "blockID", NULL);
2439
2440     oc_mutex_lock(g_context.blockDataListMutex);
2441
2442     size_t len = u_arraylist_length(g_context.dataList);
2443     for (size_t i = 0; i < len; i++)
2444     {
2445         CABlockData_t *currData = (CABlockData_t *) u_arraylist_get(g_context.dataList, i);
2446         if (CABlockidMatches(currData, blockID))
2447         {
2448             oc_mutex_unlock(g_context.blockDataListMutex);
2449             return currData;
2450         }
2451     }
2452     oc_mutex_unlock(g_context.blockDataListMutex);
2453
2454     return NULL;
2455 }
2456
2457 coap_block_t *CAGetBlockOption(const CABlockDataID_t *blockID, uint16_t blockType)
2458 {
2459     OIC_LOG(DEBUG, TAG, "IN-GetBlockOption");
2460     VERIFY_NON_NULL_RET(blockID, TAG, "blockID", NULL);
2461
2462     oc_mutex_lock(g_context.blockDataListMutex);
2463
2464     size_t len = u_arraylist_length(g_context.dataList);
2465     for (size_t i = 0; i < len; i++)
2466     {
2467         CABlockData_t *currData = (CABlockData_t *) u_arraylist_get(g_context.dataList, i);
2468         if (CABlockidMatches(currData, blockID))
2469         {
2470             oc_mutex_unlock(g_context.blockDataListMutex);
2471             OIC_LOG(DEBUG, TAG, "OUT-GetBlockOption");
2472             if (COAP_OPTION_BLOCK2 == blockType)
2473             {
2474                 return &currData->block2;
2475             }
2476             else if (COAP_OPTION_BLOCK1 == blockType)
2477             {
2478                 return &currData->block1;
2479             }
2480         }
2481     }
2482     oc_mutex_unlock(g_context.blockDataListMutex);
2483
2484     OIC_LOG(DEBUG, TAG, "OUT-GetBlockOption");
2485     return NULL;
2486 }
2487
2488 CAPayload_t CAGetPayloadFromBlockDataList(const CABlockDataID_t *blockID,
2489                                           size_t *fullPayloadLen)
2490 {
2491     OIC_LOG(DEBUG, TAG, "IN-GetFullPayload");
2492     VERIFY_NON_NULL_RET(blockID, TAG, "blockID", NULL);
2493     VERIFY_NON_NULL_RET(fullPayloadLen, TAG, "fullPayloadLen", NULL);
2494
2495     oc_mutex_lock(g_context.blockDataListMutex);
2496
2497     size_t len = u_arraylist_length(g_context.dataList);
2498     for (size_t i = 0; i < len; i++)
2499     {
2500         CABlockData_t *currData = (CABlockData_t *) u_arraylist_get(g_context.dataList, i);
2501         if (CABlockidMatches(currData, blockID))
2502         {
2503             oc_mutex_unlock(g_context.blockDataListMutex);
2504             *fullPayloadLen = currData->receivedPayloadLen;
2505             OIC_LOG(DEBUG, TAG, "OUT-GetFullPayload");
2506             return currData->payload;
2507         }
2508     }
2509     oc_mutex_unlock(g_context.blockDataListMutex);
2510
2511     OIC_LOG(DEBUG, TAG, "OUT-GetFullPayload");
2512     return NULL;
2513 }
2514
2515 CABlockData_t *CACreateNewBlockData(const CAData_t *sendData)
2516 {
2517     OIC_LOG(DEBUG, TAG, "IN-CACreateNewBlockData");
2518     VERIFY_NON_NULL_RET(sendData, TAG, "sendData", NULL);
2519
2520     // create block data
2521     CABlockData_t *data = (CABlockData_t *) OICCalloc(1, sizeof(CABlockData_t));
2522     if (!data)
2523     {
2524         OIC_LOG(ERROR, TAG, "memory alloc has failed");
2525         return NULL;
2526     }
2527
2528     data->block1.szx = CA_DEFAULT_BLOCK_SIZE;
2529     data->block2.szx = CA_DEFAULT_BLOCK_SIZE;
2530     data->sentData = CACloneCAData(sendData);
2531     if (!data->sentData)
2532     {
2533         OIC_LOG(ERROR, TAG, PCF("memory alloc has failed"));
2534         OICFree(data);
2535         return NULL;
2536     }
2537
2538     CAToken_t token = NULL;
2539     uint8_t tokenLength = 0;
2540     if (data->sentData->requestInfo)
2541     {
2542         // update token info
2543         tokenLength = data->sentData->requestInfo->info.tokenLength;
2544         token = data->sentData->requestInfo->info.token;
2545     }
2546     else if (data->sentData->responseInfo)
2547     {
2548         tokenLength = data->sentData->responseInfo->info.tokenLength;
2549         token = data->sentData->responseInfo->info.token;
2550     }
2551
2552     if (!data->sentData->remoteEndpoint)
2553     {
2554         OIC_LOG(ERROR, TAG, "remoteEndpoint is null");
2555         CADestroyDataSet(data->sentData);
2556         OICFree(data);
2557         return NULL;
2558     }
2559
2560     CABlockDataID_t* blockDataID = CACreateBlockDatablockId(token, tokenLength,
2561                                                             data->sentData->remoteEndpoint->port);
2562     if (NULL == blockDataID || blockDataID->idLength < 1)
2563     {
2564         OIC_LOG(ERROR, TAG, "blockId is null");
2565         CADestroyBlockID(blockDataID);
2566         CADestroyDataSet(data->sentData);
2567         OICFree(data);
2568         return NULL;
2569     }
2570     data->blockDataId = blockDataID;
2571     uint64_t now = OICGetCurrentTime(TIME_IN_US);
2572     data->ttl = now + (BLOCK_DATA_TIMEOUT_SECONDS * USECS_PER_SEC);
2573
2574     oc_mutex_lock(g_context.blockDataListMutex);
2575
2576     bool res = u_arraylist_add(g_context.dataList, (void *) data);
2577     if (!res)
2578     {
2579         OIC_LOG(ERROR, TAG, "add has failed");
2580         CADestroyBlockID(data->blockDataId);
2581         CADestroyDataSet(data->sentData);
2582         OICFree(data);
2583         oc_mutex_unlock(g_context.blockDataListMutex);
2584         return NULL;
2585     }
2586     oc_mutex_unlock(g_context.blockDataListMutex);
2587
2588     OIC_LOG(DEBUG, TAG, "OUT-CreateBlockData");
2589     return data;
2590 }
2591
2592 CAResult_t CARemoveBlockDataFromList(const CABlockDataID_t *blockID)
2593 {
2594     OIC_LOG_V(DEBUG, TAG, "In %s", __func__);
2595     VERIFY_NON_NULL(blockID, TAG, "blockID");
2596
2597     oc_mutex_lock(g_context.blockDataListMutex);
2598
2599     size_t len = u_arraylist_length(g_context.dataList);
2600     for (size_t i = 0; i < len; i++)
2601     {
2602         CABlockData_t *currData = (CABlockData_t *) u_arraylist_get(g_context.dataList, i);
2603         if (CABlockidMatches(currData, blockID))
2604         {
2605             CABlockData_t *removedData = u_arraylist_remove(g_context.dataList, i);
2606             if (!removedData)
2607             {
2608                 OIC_LOG(ERROR, TAG, "data is NULL");
2609                 oc_mutex_unlock(g_context.blockDataListMutex);
2610                 return CA_STATUS_FAILED;
2611             }
2612
2613             OIC_LOG(DEBUG, TAG, "Removed BlockID is ");
2614             OIC_LOG_BUFFER(DEBUG, TAG, (const uint8_t *) removedData->blockDataId->id,
2615                            removedData->blockDataId->idLength);
2616
2617             // destroy memory
2618             CADestroyDataSet(removedData->sentData);
2619             CADestroyBlockID(removedData->blockDataId);
2620             OICFree(removedData->payload);
2621             OICFree(removedData);
2622             oc_mutex_unlock(g_context.blockDataListMutex);
2623             return CA_STATUS_OK;
2624         }
2625     }
2626     oc_mutex_unlock(g_context.blockDataListMutex);
2627     OIC_LOG_V(DEBUG, TAG, "Out %s", __func__);
2628     return CA_STATUS_OK;
2629 }
2630
2631 CAResult_t CARemoveAllBlockDataFromList()
2632 {
2633     OIC_LOG(DEBUG, TAG, "CARemoveAllBlockDataFromList");
2634
2635     oc_mutex_lock(g_context.blockDataListMutex);
2636
2637     size_t len = u_arraylist_length(g_context.dataList);
2638     for (size_t i = len; i > 0; i--)
2639     {
2640         CABlockData_t *removedData = u_arraylist_remove(g_context.dataList, i - 1);
2641         if (removedData)
2642         {
2643             // destroy memory
2644             if (removedData->sentData)
2645             {
2646                 CADestroyDataSet(removedData->sentData);
2647             }
2648             CADestroyBlockID(removedData->blockDataId);
2649             OICFree(removedData->payload);
2650             OICFree(removedData);
2651         }
2652     }
2653     oc_mutex_unlock(g_context.blockDataListMutex);
2654
2655     return CA_STATUS_OK;
2656 }
2657
2658 void CADestroyDataSet(CAData_t* data)
2659 {
2660     VERIFY_NON_NULL_VOID(data, TAG, "data");
2661
2662     if (data->remoteEndpoint)
2663     {
2664         CAFreeEndpoint(data->remoteEndpoint);
2665         data->remoteEndpoint = NULL;
2666     }
2667     if (data->requestInfo)
2668     {
2669         CADestroyRequestInfoInternal(data->requestInfo);
2670         data->requestInfo = NULL;
2671     }
2672     if (data->responseInfo)
2673     {
2674         CADestroyResponseInfoInternal(data->responseInfo);
2675         data->responseInfo = NULL;
2676     }
2677     OICFree(data);
2678 }
2679
2680 CABlockDataID_t* CACreateBlockDatablockId(const CAToken_t token, uint8_t tokenLength,
2681                                           uint16_t portNumber)
2682 {
2683     char port[PORT_LENGTH] = { 0, };
2684     port[0] = (char) ((portNumber >> 8) & 0xFF);
2685     port[1] = (char) (portNumber & 0xFF);
2686
2687     CABlockDataID_t* blockDataID = (CABlockDataID_t *) OICMalloc(sizeof(CABlockDataID_t));
2688     if (!blockDataID)
2689     {
2690         OIC_LOG(ERROR, TAG, "memory alloc has failed");
2691         return NULL;
2692     }
2693     blockDataID->idLength = tokenLength + sizeof(port);
2694     blockDataID->id = (uint8_t *) OICMalloc(blockDataID->idLength);
2695     if (!blockDataID->id)
2696     {
2697         OIC_LOG(ERROR, TAG, "memory alloc has failed");
2698         OICFree(blockDataID);
2699         return NULL;
2700     }
2701
2702     if (token)
2703     {
2704         memcpy(blockDataID->id, token, tokenLength);
2705     }
2706
2707     memcpy(blockDataID->id + tokenLength, port, sizeof(port));
2708
2709     OIC_LOG(DEBUG, TAG, "BlockID is ");
2710     OIC_LOG_BUFFER(DEBUG, TAG, (const uint8_t *)blockDataID->id, blockDataID->idLength);
2711
2712     return blockDataID;
2713 }
2714
2715 void CADestroyBlockID(CABlockDataID_t *blockID)
2716 {
2717     VERIFY_NON_NULL_VOID(blockID, TAG, "blockID");
2718     OICFree(blockID->id);
2719     OICFree(blockID);
2720     blockID = NULL;
2721 }
2722
2723 bool CABlockidMatches(const CABlockData_t *currData, const CABlockDataID_t *blockID)
2724 {
2725     VERIFY_NON_NULL_RET(currData, TAG, "currData", false);
2726     VERIFY_NON_NULL_RET(blockID, TAG, "blockID", false);
2727     VERIFY_NON_NULL_RET(blockID->id, TAG, "blockID->id", false);
2728
2729     if ((currData->blockDataId)
2730         && (currData->blockDataId->id)
2731         && (currData->blockDataId->idLength == blockID->idLength)
2732         && !memcmp(currData->blockDataId->id, blockID->id, currData->blockDataId->idLength))
2733     {
2734         return true;
2735     }
2736     return false;
2737 }
2738
2739 void CALogBlockInfo(coap_block_t *block)
2740 {
2741     VERIFY_NON_NULL_VOID(block, TAG, "block");
2742
2743     OIC_LOG(DEBUG, TAG, "block option info");
2744
2745     OIC_LOG_V(DEBUG, TAG, "block option-num : %d", block->num);
2746
2747     OIC_LOG_V(DEBUG, TAG, "block option-m   : %d", block->m);
2748
2749     OIC_LOG_V(DEBUG, TAG, "block option-szx : %d", block->szx);
2750 }
2751
2752 CAResult_t CARemoveBlockDataFromListWithSeed(const CAToken_t token, uint8_t tokenLength,
2753                                              uint16_t portNumber)
2754 {
2755     CABlockDataID_t* blockDataID = CACreateBlockDatablockId(token, tokenLength, portNumber);
2756     if (NULL == blockDataID || blockDataID->idLength < 1)
2757     {
2758         OIC_LOG(ERROR, TAG, "blockId is null");
2759         CADestroyBlockID(blockDataID);
2760         return CA_STATUS_FAILED;
2761     }
2762
2763     CAResult_t res = CARemoveBlockDataFromList(blockDataID);
2764     if (CA_STATUS_OK != res)
2765     {
2766         OIC_LOG(ERROR, TAG, "CARemoveBlockDataFromList failed");
2767     }
2768
2769     CADestroyBlockID(blockDataID);
2770     return res;
2771 }
2772
2773 void CAResetBlockDataTTL(const CABlockDataID_t *blockID)
2774 {
2775     OIC_LOG_V(DEBUG, TAG, "In %s", __func__);
2776
2777     oc_mutex_lock(g_context.blockDataListMutex);
2778     size_t len = u_arraylist_length(g_context.dataList);
2779     for (size_t i = 0; i < len; i++)
2780     {
2781         CABlockData_t *blockData = (CABlockData_t *) u_arraylist_get(g_context.dataList, i);
2782         if (CABlockidMatches(blockData, blockID))
2783         {
2784             uint64_t now = OICGetCurrentTime(TIME_IN_US);
2785             blockData->ttl = now + (BLOCK_DATA_TIMEOUT_SECONDS * USECS_PER_SEC);
2786             oc_mutex_unlock(g_context.blockDataListMutex);
2787             OIC_LOG_V(DEBUG, TAG, "Out %s", __func__);
2788             return;
2789         }
2790     }
2791     oc_mutex_unlock(g_context.blockDataListMutex);
2792     OIC_LOG_V(DEBUG, TAG, "Out %s", __func__);
2793 }
2794
2795 void CACheckAndDeleteTimedOutBlockData()
2796 {
2797     OIC_LOG_V(DEBUG, TAG, "In %s", __func__);
2798
2799     uint64_t now = OICGetCurrentTime(TIME_IN_US);
2800
2801     oc_mutex_lock(g_context.blockDataListMutex);
2802     for (size_t i = 0; i < u_arraylist_length(g_context.dataList); i++)
2803     {
2804         CABlockData_t *blockData = (CABlockData_t *) u_arraylist_get(g_context.dataList, i);
2805         if (blockData && blockData->ttl < now)
2806         {
2807             OIC_LOG(INFO, TAG, "Deleting timed-out BlockData");
2808             OIC_LOG(DEBUG, TAG, "BlockID is ");
2809             OIC_LOG_BUFFER(DEBUG, TAG, (const uint8_t *) blockData->blockDataId->id,
2810                            blockData->blockDataId->idLength);
2811
2812             blockData = (CABlockData_t *) u_arraylist_remove(g_context.dataList, i);
2813             if (blockData)
2814             {
2815                 // destroy memory
2816                 CADestroyDataSet(blockData->sentData);
2817                 CADestroyBlockID(blockData->blockDataId);
2818                 OICFree(blockData->payload);
2819                 OICFree(blockData);
2820             }
2821         }
2822     }
2823     oc_mutex_unlock(g_context.blockDataListMutex);
2824     OIC_LOG_V(DEBUG, TAG, "Out %s", __func__);
2825 }