resource/csdk/connectivity/src/tcp_adapter/catcpadapter.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 #include <stdio.h>
  22 #include <stdlib.h>
  23 #include <string.h>
  24 #include <stdint.h>
  25
  26 #ifndef __STDC_FORMAT_MACROS
  27 #define __STDC_FORMAT_MACROS
  28 #endif
  29 #include <inttypes.h>
  30
  31 #include "cainterface.h"
  32 #include "caipnwmonitor.h"
  33 #include "catcpadapter.h"
  34 #include "catcpinterface.h"
  35 #include "caqueueingthread.h"
  36 #include "caadapterutils.h"
  37 #include "octhread.h"
  38 #include "uarraylist.h"
  39 #include "caremotehandler.h"
  40 #include "logger.h"
  41 #include "oic_malloc.h"
  42 #ifdef __WITH_TLS__
  43 #include "ca_adapter_net_ssl.h"
  44 #endif
  45
  46 /**
  47  * Logging tag for module name.
  48  */
  49 #define TAG "OIC_CA_TCP_ADAP"
  50
  51 /**
  52  * Holds internal thread TCP data information.
  53  */
  54 typedef struct
  55 {
  56     CAEndpoint_t *remoteEndpoint;
  57     void *data;
  58     size_t dataLen;
  59     bool isMulticast;
  60 } CATCPData;
  61
  62 #define CA_TCP_LISTEN_BACKLOG  3
  63
  64 #define CA_TCP_SELECT_TIMEOUT 10
  65
  66 /**
  67  * Queue handle for Send Data.
  68  */
  69 static CAQueueingThread_t *g_sendQueueHandle = NULL;
  70
  71 /**
  72  * Network Packet Received Callback to CA.
  73  */
  74 static CANetworkPacketReceivedCallback g_networkPacketCallback = NULL;
  75
  76 /**
  77  * Adapter Changed Callback to CA.
  78  */
  79 static CAAdapterChangeCallback g_networkChangeCallback = NULL;
  80
  81 /**
  82  * Connection Changed Callback to CA.
  83  */
  84 static CAConnectionChangeCallback g_connectionChangeCallback = NULL;
  85
  86 /**
  87  * error Callback to CA adapter.
  88  */
  89 static CAErrorHandleCallback g_errorCallback = NULL;
  90
  91 /**
  92  * KeepAlive Connected or Disconnected Callback to CA adapter.
  93  */
  94 static CAKeepAliveConnectionCallback g_connKeepAliveCallback = NULL;
  95
  96 static CAResult_t CATCPPacketReceivedCB(const CASecureEndpoint_t *sep,
  97                                         const void *data, uint32_t dataLength);
  98
  99 static void CATCPErrorHandler(const CAEndpoint_t *endpoint, const void *data,
 100                               size_t dataLength, CAResult_t result);
 101
 102 static CAResult_t CATCPInitializeQueueHandles();
 103
 104 static void CATCPDeinitializeQueueHandles();
 105
 106 static void CATCPSendDataThread(void *threadData);
 107
 108 static CATCPData *CACreateTCPData(const CAEndpoint_t *remoteEndpoint,
 109                                   const void *data, size_t dataLength,
 110                                   bool isMulticast);
 111 void CAFreeTCPData(CATCPData *ipData);
 112
 113 static void CADataDestroyer(void *data, uint32_t size);
 114
 115 CAResult_t CATCPInitializeQueueHandles()
 116 {
 117     // Check if the message queue is already initialized
 118     if (g_sendQueueHandle)
 119     {
 120         OIC_LOG(DEBUG, TAG, "send queue handle is already initialized!");
 121         return CA_STATUS_OK;
 122     }
 123
 124     // Create send message queue
 125     g_sendQueueHandle = OICMalloc(sizeof(CAQueueingThread_t));
 126     if (!g_sendQueueHandle)
 127     {
 128         OIC_LOG(ERROR, TAG, "Memory allocation failed!");
 129         return CA_MEMORY_ALLOC_FAILED;
 130     }
 131
 132     if (CA_STATUS_OK != CAQueueingThreadInitialize(g_sendQueueHandle,
 133                                 (const ca_thread_pool_t)caglobals.tcp.threadpool,
 134                                 CATCPSendDataThread, CADataDestroyer))
 135     {
 136         OIC_LOG(ERROR, TAG, "Failed to Initialize send queue thread");
 137         OICFree(g_sendQueueHandle);
 138         g_sendQueueHandle = NULL;
 139         return CA_STATUS_FAILED;
 140     }
 141
 142     return CA_STATUS_OK;
 143 }
 144
 145 void CATCPDeinitializeQueueHandles()
 146 {
 147     CAQueueingThreadDestroy(g_sendQueueHandle);
 148     OICFree(g_sendQueueHandle);
 149     g_sendQueueHandle = NULL;
 150 }
 151
 152 void CATCPConnectionStateCB(const char *ipAddress, CANetworkStatus_t status)
 153 {
 154     (void)ipAddress;
 155     (void)status;
 156 }
 157
 158 CAResult_t CATCPPacketReceivedCB(const CASecureEndpoint_t *sep, const void *data,
 159                                  uint32_t dataLength)
 160 {
 161     VERIFY_NON_NULL(sep, TAG, "sep is NULL");
 162     VERIFY_NON_NULL(data, TAG, "data is NULL");
 163
 164     OIC_LOG_V(DEBUG, TAG, "Address: %s, port:%d", sep->endpoint.addr, sep->endpoint.port);
 165
 166     CAResult_t res = CA_STATUS_OK;
 167 #ifdef SINGLE_THREAD
 168     if (g_networkPacketCallback)
 169     {
 170         res = g_networkPacketCallback(sep, data, dataLength);
 171         if (CA_STATUS_OK != res)
 172         {
 173             OIC_LOG(ERROR, TAG, "Error parsing CoAP data");
 174         }
 175     }
 176 #else
 177     unsigned char *buffer = (unsigned char*)data;
 178     size_t bufferLen = dataLength;
 179     size_t index = 0;
 180
 181     //get remote device information from file descriptor.
 182     CATCPSessionInfo_t *svritem = CAGetTCPSessionInfoFromEndpoint(&sep->endpoint, &index);
 183     if (!svritem)
 184     {
 185         OIC_LOG(ERROR, TAG, "there is no connection information in list");
 186         return CA_STATUS_INVALID_PARAM;
 187     }
 188     if (UNKNOWN == svritem->protocol)
 189     {
 190         OIC_LOG(ERROR, TAG, "invalid protocol type");
 191         return CA_STATUS_INVALID_PARAM;
 192     }
 193
 194     //totalLen filled only when header fully read and parsed
 195     while (0 != bufferLen)
 196     {
 197         res = CAConstructCoAP(svritem, &buffer, &bufferLen);
 198         if (CA_STATUS_OK != res)
 199         {
 200             OIC_LOG_V(ERROR, TAG, "CAConstructCoAP return error : %d", res);
 201             return res;
 202         }
 203
 204         //when successfully read all required data - pass them to upper layer.
 205         if (svritem->len == svritem->totalLen)
 206         {
 207             if (g_networkPacketCallback)
 208             {
 209                 res = g_networkPacketCallback(sep, svritem->data, svritem->totalLen);
 210                 if (CA_STATUS_OK != res)
 211                 {
 212                     OIC_LOG(ERROR, TAG, "Error parsing CoAP data");
 213                     return res;
 214                 }
 215             }
 216             CACleanData(svritem);
 217         }
 218         else
 219         {
 220             OIC_LOG_V(DEBUG, TAG, "%u bytes required for complete CoAP",
 221                                 svritem->totalLen - svritem->len);
 222         }
 223     }
 224 #endif
 225     return res;
 226 }
 227
 228 #ifdef __WITH_TLS__
 229 static ssize_t CATCPPacketSendCB(CAEndpoint_t *endpoint, const void *data, size_t dataLength)
 230 {
 231     OIC_LOG_V(DEBUG, TAG, "In %s", __func__);
 232     VERIFY_NON_NULL_RET(endpoint, TAG, "endpoint is NULL", -1);
 233     VERIFY_NON_NULL_RET(data, TAG, "data is NULL", -1);
 234
 235     OIC_LOG_V(DEBUG, TAG, "Address: %s, port:%d", endpoint->addr, endpoint->port);
 236     OIC_LOG_BUFFER(DEBUG, TAG, data, dataLength);
 237
 238     ssize_t ret = CATCPSendData(endpoint, data, dataLength);
 239     OIC_LOG_V(DEBUG, TAG, "Out %s : %d bytes sent", __func__, ret);
 240     return ret;
 241 }
 242 #endif
 243
 244 static void CATCPErrorHandler(const CAEndpoint_t *endpoint, const void *data,
 245                               size_t dataLength, CAResult_t result)
 246 {
 247     VERIFY_NON_NULL_VOID(endpoint, TAG, "endpoint is NULL");
 248     VERIFY_NON_NULL_VOID(data, TAG, "data is NULL");
 249
 250     if (g_errorCallback)
 251     {
 252         g_errorCallback(endpoint, data, dataLength, result);
 253     }
 254 }
 255
 256 static void CATCPConnectionHandler(const CAEndpoint_t *endpoint, bool isConnected, bool isClient)
 257 {
 258     // Pass the changed connection status to RI Layer for keepalive.
 259     if (g_connKeepAliveCallback)
 260     {
 261         g_connKeepAliveCallback(endpoint, isConnected, isClient);
 262     }
 263
 264     // Pass the changed connection status to CAUtil.
 265     if (g_connectionChangeCallback)
 266     {
 267         g_connectionChangeCallback(endpoint, isConnected);
 268     }
 269 }
 270
 271 void CATCPSetKeepAliveCallbacks(CAKeepAliveConnectionCallback ConnHandler)
 272 {
 273     g_connKeepAliveCallback = ConnHandler;
 274 }
 275
 276 void CATCPAdapterHandler(CATransportAdapter_t adapter, CANetworkStatus_t status)
 277 {
 278     if (g_networkChangeCallback)
 279     {
 280         g_networkChangeCallback(adapter, status);
 281     }
 282
 283     if (CA_INTERFACE_DOWN == status)
 284     {
 285         OIC_LOG(INFO, TAG, "Network status is down, close all session");
 286
 287         CAResult_t res = CAQueueingThreadClearData(g_sendQueueHandle);
 288         if (res != CA_STATUS_OK)
 289         {
 290             OIC_LOG_V(ERROR, TAG, "CAQueueingThreadClearData failed[%d]", res);
 291         }
 292
 293         CATCPStopServer();
 294     }
 295     else if (CA_INTERFACE_UP == status)
 296     {
 297         OIC_LOG(INFO, TAG, "Network status is up, create new socket for listening");
 298
 299         CAResult_t ret = CA_STATUS_FAILED;
 300 #ifndef SINGLE_THREAD
 301         ret = CATCPStartServer((const ca_thread_pool_t)caglobals.tcp.threadpool);
 302 #else
 303         ret = CATCPStartServer();
 304 #endif
 305         if (CA_STATUS_OK != ret)
 306         {
 307             OIC_LOG_V(ERROR, TAG, "CATCPStartServer failed[%d]", ret);
 308         }
 309     }
 310 }
 311
 312 static void CAInitializeTCPGlobals()
 313 {
 314     caglobals.tcp.ipv4.fd = -1;
 315     caglobals.tcp.ipv4s.fd = -1;
 316     caglobals.tcp.ipv6.fd = -1;
 317     caglobals.tcp.ipv6s.fd = -1;
 318
 319     // Set the port number received from application.
 320     caglobals.tcp.ipv4.port = caglobals.ports.tcp.u4;
 321     caglobals.tcp.ipv4s.port = caglobals.ports.tcp.u4s;
 322     caglobals.tcp.ipv6.port = caglobals.ports.tcp.u6;
 323     caglobals.tcp.ipv6s.port = caglobals.ports.tcp.u6s;
 324
 325     caglobals.tcp.selectTimeout = CA_TCP_SELECT_TIMEOUT;
 326     caglobals.tcp.listenBacklog = CA_TCP_LISTEN_BACKLOG;
 327     caglobals.tcp.svrlist = NULL;
 328
 329     CATransportFlags_t flags = 0;
 330     if (caglobals.client)
 331     {
 332         flags |= caglobals.clientFlags;
 333     }
 334     if (caglobals.server)
 335     {
 336         flags |= caglobals.serverFlags;
 337     }
 338
 339     caglobals.tcp.ipv4tcpenabled = flags & CA_IPV4;
 340     caglobals.tcp.ipv6tcpenabled = flags & CA_IPV6;
 341 }
 342
 343 CAResult_t CAInitializeTCP(CARegisterConnectivityCallback registerCallback,
 344                            CANetworkPacketReceivedCallback networkPacketCallback,
 345                            CAAdapterChangeCallback netCallback,
 346                            CAConnectionChangeCallback connCallback,
 347                            CAErrorHandleCallback errorCallback, ca_thread_pool_t handle)
 348 {
 349     OIC_LOG(DEBUG, TAG, "IN");
 350     VERIFY_NON_NULL(registerCallback, TAG, "registerCallback");
 351     VERIFY_NON_NULL(networkPacketCallback, TAG, "networkPacketCallback");
 352     VERIFY_NON_NULL(netCallback, TAG, "netCallback");
 353 #ifndef SINGLE_THREAD
 354     VERIFY_NON_NULL(handle, TAG, "thread pool handle");
 355 #endif
 356
 357     g_networkChangeCallback = netCallback;
 358     g_connectionChangeCallback = connCallback;
 359     g_networkPacketCallback = networkPacketCallback;
 360     g_errorCallback = errorCallback;
 361
 362     CAInitializeTCPGlobals();
 363
 364     CAResult_t res = CATCPCreateMutex();
 365     if (CA_STATUS_OK == res)
 366     {
 367         res = CATCPCreateCond();
 368     }
 369     if (CA_STATUS_OK != res)
 370     {
 371         OIC_LOG(ERROR, TAG, "failed to create mutex/cond");
 372         CATCPDestroyMutex();
 373         CATCPDestroyCond();
 374         return res;
 375     }
 376
 377 #ifndef SINGLE_THREAD
 378     caglobals.tcp.threadpool = handle;
 379 #endif
 380
 381     CATCPSetConnectionChangedCallback(CATCPConnectionHandler);
 382     CATCPSetPacketReceiveCallback(CATCPPacketReceivedCB);
 383     CATCPSetErrorHandler(CATCPErrorHandler);
 384
 385 #ifdef __WITH_TLS__
 386     CAsetSslAdapterCallbacks(CATCPPacketReceivedCB, CATCPPacketSendCB, CA_ADAPTER_TCP);
 387 #endif
 388
 389     CAConnectivityHandler_t tcpHandler = {
 390         .startAdapter = CAStartTCP,
 391         .startListenServer = CAStartTCPListeningServer,
 392         .stopListenServer = CAStopTCPListeningServer,
 393         .startDiscoveryServer = CAStartTCPDiscoveryServer,
 394         .sendData = CASendTCPUnicastData,
 395         .sendDataToAll = CASendTCPMulticastData,
 396         .GetnetInfo = CAGetTCPInterfaceInformation,
 397         .readData = CAReadTCPData,
 398         .stopAdapter = CAStopTCP,
 399         .terminate = CATerminateTCP,
 400         .cType = CA_ADAPTER_TCP};
 401
 402     registerCallback(tcpHandler);
 403
 404     OIC_LOG(INFO, TAG, "OUT IntializeTCP is Success");
 405     return CA_STATUS_OK;
 406 }
 407
 408 CAResult_t CAStartTCP()
 409 {
 410     OIC_LOG(DEBUG, TAG, "IN");
 411
 412 #ifndef SINGLE_THREAD
 413     if (CA_STATUS_OK != CATCPInitializeQueueHandles())
 414     {
 415         OIC_LOG(ERROR, TAG, "Failed to Initialize Queue Handle");
 416         CATerminateTCP();
 417         return CA_STATUS_FAILED;
 418     }
 419
 420     // Start send queue thread
 421 #ifndef __TIZENRT__
 422     if (CA_STATUS_OK != CAQueueingThreadStart(g_sendQueueHandle))
 423 #else
 424     if (CA_STATUS_OK != CAQueueingThreadStart(g_sendQueueHandle, "IoT_TCPSendQueue"))
 425 #endif
 426     {
 427         OIC_LOG(ERROR, TAG, "Failed to Start Send Data Thread");
 428         return CA_STATUS_FAILED;
 429     }
 430 #else
 431     CAResult_t ret = CATCPStartServer();
 432     if (CA_STATUS_OK != ret)
 433     {
 434         OIC_LOG_V(DEBUG, TAG, "CATCPStartServer failed[%d]", ret);
 435         return ret;
 436     }
 437 #endif
 438
 439     // Start network monitoring to receive adapter status changes.
 440     CAIPStartNetworkMonitor(CATCPAdapterHandler, CA_ADAPTER_TCP);
 441
 442     return CA_STATUS_OK;
 443 }
 444
 445 static bool CAClearQueueEndpointDataContext(void *data, uint32_t size, void *ctx)
 446 {
 447     if (NULL == data || NULL == ctx)
 448     {
 449         return false;
 450     }
 451
 452     CATCPData *tcpData = (CATCPData *)data;
 453     CAEndpoint_t *endpoint = (CAEndpoint_t *)ctx;
 454
 455     if (NULL != tcpData && NULL != tcpData->remoteEndpoint)
 456     {
 457         if (strcmp(tcpData->remoteEndpoint->addr, endpoint->addr) == 0
 458             && tcpData->remoteEndpoint->port == endpoint->port)
 459         {
 460             return true;
 461         }
 462     }
 463     return false;
 464 }
 465
 466 CAResult_t CATCPDisconnectSession(const CAEndpoint_t *endpoint)
 467 {
 468     CAResult_t res = CA_STATUS_OK;
 469 #ifdef __WITH_TLS__
 470     res = CAcloseSslConnection(endpoint);
 471     if (CA_STATUS_OK != res)
 472     {
 473         OIC_LOG(ERROR, TAG, "failed to close TLS session");
 474         res = CAQueueingThreadClearContextData(g_sendQueueHandle,
 475                                                CAClearQueueEndpointDataContext,
 476                                                endpoint);
 477         if (CA_STATUS_OK != res)
 478         {
 479             OIC_LOG(ERROR, TAG, "failed to clear context data");
 480         }
 481
 482         return res;
 483     }
 484 #endif
 485
 486     res = CASearchAndDeleteTCPSession(endpoint);
 487     if (CA_STATUS_OK != res)
 488     {
 489         OIC_LOG(ERROR, TAG, "failed to close TCP session");
 490     }
 491
 492     res = CAQueueingThreadClearContextData(g_sendQueueHandle,
 493                                            CAClearQueueEndpointDataContext,
 494                                            endpoint);
 495     if (CA_STATUS_OK != res)
 496     {
 497         OIC_LOG(ERROR, TAG, "failed to clear context data");
 498     }
 499
 500     return res;
 501 }
 502
 503 CAResult_t CAStartTCPListeningServer()
 504 {
 505 #ifndef SINGLE_THREAD
 506     if (!caglobals.server)
 507     {
 508         caglobals.server = true;    // only needed to run CA tests
 509     }
 510
 511     CAResult_t ret = CATCPStartServer((const ca_thread_pool_t)caglobals.tcp.threadpool);
 512     if (CA_STATUS_OK != ret)
 513     {
 514         OIC_LOG_V(ERROR, TAG, "Failed to start listening server![%d]", ret);
 515         return ret;
 516     }
 517 #endif
 518
 519     return CA_STATUS_OK;
 520 }
 521
 522 CAResult_t CAStopTCPListeningServer()
 523 {
 524     return CA_STATUS_OK;
 525 }
 526
 527 CAResult_t CAStartTCPDiscoveryServer()
 528 {
 529     if (!caglobals.client)
 530     {
 531         caglobals.client = true;    // only needed to run CA tests
 532     }
 533
 534     CAResult_t ret = CATCPStartServer((const ca_thread_pool_t)caglobals.tcp.threadpool);
 535     if (CA_STATUS_OK != ret)
 536     {
 537         OIC_LOG_V(ERROR, TAG, "Failed to start discovery server![%d]", ret);
 538         return ret;
 539     }
 540
 541     return CA_STATUS_OK;
 542 }
 543
 544 static size_t CAQueueTCPData(bool isMulticast, const CAEndpoint_t *endpoint,
 545                              const void *data, size_t dataLength)
 546 {
 547     VERIFY_NON_NULL_RET(endpoint, TAG, "endpoint", -1);
 548     VERIFY_NON_NULL_RET(data, TAG, "data", -1);
 549
 550     if (0 == dataLength)
 551     {
 552         OIC_LOG(ERROR, TAG, "Invalid Data Length");
 553         return -1;
 554     }
 555
 556     VERIFY_NON_NULL_RET(g_sendQueueHandle, TAG, "sendQueueHandle", -1);
 557
 558     // Create TCPData to add to queue
 559     CATCPData *tcpData = CACreateTCPData(endpoint, data, dataLength, isMulticast);
 560     if (!tcpData)
 561     {
 562         OIC_LOG(ERROR, TAG, "Failed to create ipData!");
 563         return -1;
 564     }
 565     // Add message to send queue
 566     CAQueueingThreadAddData(g_sendQueueHandle, tcpData, sizeof(CATCPData));
 567
 568     return dataLength;
 569 }
 570
 571 int32_t CASendTCPUnicastData(const CAEndpoint_t *endpoint,
 572                              const void *data, uint32_t dataLength,
 573                              CADataType_t dataType)
 574 {
 575     OIC_LOG(DEBUG, TAG, "IN");
 576     (void)dataType;
 577 #ifndef SINGLE_THREAD
 578     return CAQueueTCPData(false, endpoint, data, dataLength);
 579 #else
 580     return CATCPSendData(endpoint, data, dataLength);
 581 #endif
 582 }
 583
 584 int32_t CASendTCPMulticastData(const CAEndpoint_t *endpoint,
 585                                const void *data, uint32_t dataLength,
 586                                CADataType_t dataType)
 587 {
 588     (void)dataType;
 589     return CAQueueTCPData(true, endpoint, data, dataLength);
 590 }
 591
 592 CAResult_t CAReadTCPData()
 593 {
 594     OIC_LOG(DEBUG, TAG, "IN");
 595 #ifdef SINGLE_THREAD
 596     CATCPPullData();
 597 #endif
 598     return CA_STATUS_OK;
 599 }
 600
 601 CAResult_t CAStopTCP()
 602 {
 603     CAIPStopNetworkMonitor(CA_ADAPTER_TCP);
 604
 605 #ifndef SINGLE_THREAD
 606     if (g_sendQueueHandle && g_sendQueueHandle->threadMutex)
 607     {
 608         CAQueueingThreadStop(g_sendQueueHandle);
 609     }
 610     CATCPDeinitializeQueueHandles();
 611 #endif
 612
 613     CATCPStopServer();
 614
 615     //Re-initializing the Globals to start them again
 616     CAInitializeTCPGlobals();
 617
 618     return CA_STATUS_OK;
 619 }
 620
 621 void CATerminateTCP()
 622 {
 623     CATCPSetPacketReceiveCallback(NULL);
 624
 625     CATCPDestroyMutex();
 626     CATCPDestroyCond();
 627 }
 628
 629 void CATCPSendDataThread(void *threadData)
 630 {
 631     CATCPData *tcpData = (CATCPData *) threadData;
 632     if (!tcpData)
 633     {
 634         OIC_LOG(DEBUG, TAG, "Invalid TCP data!");
 635         return;
 636     }
 637
 638     if (caglobals.tcp.terminate)
 639     {
 640         OIC_LOG(DEBUG, TAG, "Adapter is not enabled");
 641         CATCPErrorHandler(tcpData->remoteEndpoint, tcpData->data, tcpData->dataLen,
 642                           CA_SEND_FAILED);
 643         return;
 644     }
 645
 646     if (tcpData->isMulticast)
 647     {
 648         //Processing for sending multicast
 649         OIC_LOG(DEBUG, TAG, "Send Multicast Data is called, not supported");
 650         return;
 651     }
 652     else
 653     {
 654 #ifdef __WITH_TLS__
 655         if (tcpData->remoteEndpoint && tcpData->remoteEndpoint->flags & CA_SECURE)
 656         {
 657             CAResult_t result = CA_STATUS_OK;
 658             OIC_LOG(DEBUG, TAG, "CAencryptSsl called!");
 659             result = CAencryptSsl(tcpData->remoteEndpoint, tcpData->data, tcpData->dataLen);
 660
 661             if (CA_STATUS_OK != result)
 662             {
 663                 OIC_LOG(ERROR, TAG, "CAAdapterNetDtlsEncrypt failed!");
 664                 CASearchAndDeleteTCPSession(tcpData->remoteEndpoint);
 665                 CATCPErrorHandler(tcpData->remoteEndpoint, tcpData->data, tcpData->dataLen,
 666                                   CA_SEND_FAILED);
 667             }
 668             OIC_LOG_V(DEBUG, TAG,
 669                       "CAAdapterNetDtlsEncrypt returned with result[%d]", result);
 670             return;
 671         }
 672 #endif
 673         //Processing for sending unicast
 674          ssize_t dlen = CATCPSendData(tcpData->remoteEndpoint, tcpData->data, tcpData->dataLen);
 675          if (-1 == dlen)
 676          {
 677              OIC_LOG(ERROR, TAG, "CATCPSendData failed");
 678              CASearchAndDeleteTCPSession(tcpData->remoteEndpoint);
 679              CATCPErrorHandler(tcpData->remoteEndpoint, tcpData->data, tcpData->dataLen,
 680                                CA_SEND_FAILED);
 681          }
 682     }
 683 }
 684
 685 CATCPData *CACreateTCPData(const CAEndpoint_t *remoteEndpoint, const void *data,
 686                            size_t dataLength, bool isMulticast)
 687 {
 688     VERIFY_NON_NULL_RET(remoteEndpoint, TAG, "remoteEndpoint is NULL", NULL);
 689     VERIFY_NON_NULL_RET(data, TAG, "data is NULL", NULL);
 690
 691     CATCPData *tcpData = (CATCPData *) OICCalloc(1, sizeof(*tcpData));
 692     if (!tcpData)
 693     {
 694         OIC_LOG(ERROR, TAG, "Memory allocation failed!");
 695         return NULL;
 696     }
 697
 698     tcpData->remoteEndpoint = CACloneEndpoint(remoteEndpoint);
 699     tcpData->data = (void *) OICMalloc(dataLength);
 700     if (!tcpData->data)
 701     {
 702         OIC_LOG(ERROR, TAG, "Memory allocation failed!");
 703         CAFreeTCPData(tcpData);
 704         return NULL;
 705     }
 706
 707     memcpy(tcpData->data, data, dataLength);
 708     tcpData->dataLen = dataLength;
 709
 710     tcpData->isMulticast = isMulticast;
 711
 712     return tcpData;
 713 }
 714
 715 void CAFreeTCPData(CATCPData *tcpData)
 716 {
 717     VERIFY_NON_NULL_VOID(tcpData, TAG, "tcpData is NULL");
 718
 719     CAFreeEndpoint(tcpData->remoteEndpoint);
 720     OICFree(tcpData->data);
 721     OICFree(tcpData);
 722 }
 723
 724 void CADataDestroyer(void *data, uint32_t size)
 725 {
 726     if (size < sizeof(CATCPData))
 727     {
 728 #ifndef __TIZENRT__
 729         OIC_LOG_V(ERROR, TAG, "Destroy data too small %p %" PRIu32, data, size);
 730 #endif
 731     }
 732     CATCPData *TCPData = (CATCPData *) data;
 733
 734     CAFreeTCPData(TCPData);
 735 }
 736
 737 #ifdef SINGLE_THREAD
 738 size_t CAGetTotalLengthFromPacketHeader(const unsigned char *recvBuffer, size_t size)
 739 {
 740     OIC_LOG(DEBUG, TAG, "IN - CAGetTotalLengthFromHeader");
 741
 742     if (NULL == recvBuffer || !size)
 743     {
 744         OIC_LOG(ERROR, TAG, "recvBuffer is NULL");
 745         return 0;
 746     }
 747
 748     coap_transport_t transport = coap_get_tcp_header_type_from_initbyte(
 749             ((unsigned char *)recvBuffer)[0] >> 4);
 750     size_t optPaylaodLen = coap_get_length_from_header((unsigned char *)recvBuffer,
 751                                                         transport);
 752     size_t headerLen = coap_get_tcp_header_length((unsigned char *)recvBuffer);
 753
 754     OIC_LOG_V(DEBUG, TAG, "option/paylaod length [%d]", optPaylaodLen);
 755     OIC_LOG_V(DEBUG, TAG, "header length [%d]", headerLen);
 756     OIC_LOG_V(DEBUG, TAG, "total data length [%d]", headerLen + optPaylaodLen);
 757
 758     OIC_LOG(DEBUG, TAG, "OUT - CAGetTotalLengthFromHeader");
 759     return headerLen + optPaylaodLen;
 760 }
 761
 762 void CAGetTCPHeaderDetails(unsigned char* recvBuffer, coap_transport_t *transport,
 763                            size_t *headerlen)
 764 {
 765     if (NULL == recvBuffer)
 766     {
 767         OIC_LOG(ERROR, TAG, "recvBuffer is NULL");
 768         return;
 769     }
 770
 771     if (NULL == transport)
 772     {
 773         OIC_LOG(ERROR, TAG, "transport is NULL");
 774         return;
 775     }
 776
 777     if (NULL == headerlen)
 778     {
 779         OIC_LOG(ERROR, TAG, "headerlen is NULL");
 780         return;
 781     }
 782
 783     *transport = coap_get_tcp_header_type_from_initbyte(
 784         ((unsigned char *)recvBuffer)[0] >> 4);
 785     *headerlen = coap_get_tcp_header_length_for_transport(*transport);
 786 }
 787 #endif