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     res = CATCPCreateSendMutex();
 378     if (CA_STATUS_OK == res)
 379     {
 380         res = CATCPCreateSendCond();
 381     }
 382     if (CA_STATUS_OK != res)
 383     {
 384         OIC_LOG(ERROR, TAG, "failed to create send data mutex/cond");
 385         CATCPDestroyMutex();
 386         CATCPDestroyCond();
 387         CATCPDestroySendMutex();
 388         CATCPDestroySendCond();
 389         return res;
 390     }
 391
 392 #ifndef SINGLE_THREAD
 393     caglobals.tcp.threadpool = handle;
 394 #endif
 395
 396     CATCPSetConnectionChangedCallback(CATCPConnectionHandler);
 397     CATCPSetPacketReceiveCallback(CATCPPacketReceivedCB);
 398     CATCPSetErrorHandler(CATCPErrorHandler);
 399
 400 #ifdef __WITH_TLS__
 401     CAsetSslAdapterCallbacks(CATCPPacketReceivedCB, CATCPPacketSendCB, CA_ADAPTER_TCP);
 402 #endif
 403
 404     CAConnectivityHandler_t tcpHandler = {
 405         .startAdapter = CAStartTCP,
 406         .startListenServer = CAStartTCPListeningServer,
 407         .stopListenServer = CAStopTCPListeningServer,
 408         .startDiscoveryServer = CAStartTCPDiscoveryServer,
 409         .sendData = CASendTCPUnicastData,
 410         .sendDataToAll = CASendTCPMulticastData,
 411         .GetnetInfo = CAGetTCPInterfaceInformation,
 412         .readData = CAReadTCPData,
 413         .stopAdapter = CAStopTCP,
 414         .terminate = CATerminateTCP,
 415         .cType = CA_ADAPTER_TCP};
 416
 417     registerCallback(tcpHandler);
 418
 419     OIC_LOG(INFO, TAG, "OUT IntializeTCP is Success");
 420     return CA_STATUS_OK;
 421 }
 422
 423 CAResult_t CAStartTCP()
 424 {
 425     OIC_LOG(DEBUG, TAG, "IN");
 426
 427 #ifndef SINGLE_THREAD
 428     if (CA_STATUS_OK != CATCPInitializeQueueHandles())
 429     {
 430         OIC_LOG(ERROR, TAG, "Failed to Initialize Queue Handle");
 431         CATerminateTCP();
 432         return CA_STATUS_FAILED;
 433     }
 434
 435     // Start send queue thread
 436 #ifndef __TIZENRT__
 437     if (CA_STATUS_OK != CAQueueingThreadStart(g_sendQueueHandle))
 438 #else
 439     if (CA_STATUS_OK != CAQueueingThreadStart(g_sendQueueHandle, "IoT_TCPSendQueue"))
 440 #endif
 441     {
 442         OIC_LOG(ERROR, TAG, "Failed to Start Send Data Thread");
 443         return CA_STATUS_FAILED;
 444     }
 445 #else
 446     CAResult_t ret = CATCPStartServer();
 447     if (CA_STATUS_OK != ret)
 448     {
 449         OIC_LOG_V(DEBUG, TAG, "CATCPStartServer failed[%d]", ret);
 450         return ret;
 451     }
 452 #endif
 453
 454     // Start network monitoring to receive adapter status changes.
 455     CAIPStartNetworkMonitor(CATCPAdapterHandler, CA_ADAPTER_TCP);
 456
 457     return CA_STATUS_OK;
 458 }
 459
 460 static bool CAClearQueueEndpointDataContext(void *data, uint32_t size, void *ctx)
 461 {
 462     (void)size;
 463
 464     if (NULL == data || NULL == ctx)
 465     {
 466         return false;
 467     }
 468
 469     CATCPData *tcpData = (CATCPData *)data;
 470     CAEndpoint_t *endpoint = (CAEndpoint_t *)ctx;
 471
 472     if (NULL != tcpData && NULL != tcpData->remoteEndpoint)
 473     {
 474         if (strcmp(tcpData->remoteEndpoint->addr, endpoint->addr) == 0
 475             && tcpData->remoteEndpoint->port == endpoint->port)
 476         {
 477             return true;
 478         }
 479     }
 480     return false;
 481 }
 482
 483 CAResult_t CATCPDisconnectSession(const CAEndpoint_t *endpoint)
 484 {
 485     CAResult_t res = CAQueueingThreadClearContextData(g_sendQueueHandle,
 486                                                       CAClearQueueEndpointDataContext,
 487                                                       endpoint);
 488     if (CA_STATUS_OK != res)
 489     {
 490         OIC_LOG(ERROR, TAG, "failed to clear context data");
 491     }
 492
 493 #ifdef __WITH_TLS__
 494     res = CAcloseSslConnection(endpoint);
 495     if (CA_STATUS_OK != res)
 496     {
 497         OIC_LOG(ERROR, TAG, "failed to close TLS session");
 498     }
 499 #endif
 500
 501     res = CASearchAndDeleteTCPSession(endpoint);
 502     if (CA_STATUS_OK != res)
 503     {
 504         OIC_LOG(ERROR, TAG, "failed to close TCP session");
 505     }
 506
 507     return res;
 508 }
 509
 510 CAResult_t CAStartTCPListeningServer()
 511 {
 512 #ifndef SINGLE_THREAD
 513     if (!caglobals.server)
 514     {
 515         caglobals.server = true;    // only needed to run CA tests
 516     }
 517
 518     CAResult_t ret = CATCPStartServer((const ca_thread_pool_t)caglobals.tcp.threadpool);
 519     if (CA_STATUS_OK != ret)
 520     {
 521         OIC_LOG_V(ERROR, TAG, "Failed to start listening server![%d]", ret);
 522         return ret;
 523     }
 524 #endif
 525
 526     return CA_STATUS_OK;
 527 }
 528
 529 CAResult_t CAStopTCPListeningServer()
 530 {
 531     return CA_STATUS_OK;
 532 }
 533
 534 CAResult_t CAStartTCPDiscoveryServer()
 535 {
 536     if (!caglobals.client)
 537     {
 538         caglobals.client = true;    // only needed to run CA tests
 539     }
 540
 541     CAResult_t ret = CATCPStartServer((const ca_thread_pool_t)caglobals.tcp.threadpool);
 542     if (CA_STATUS_OK != ret)
 543     {
 544         OIC_LOG_V(ERROR, TAG, "Failed to start discovery server![%d]", ret);
 545         return ret;
 546     }
 547
 548     return CA_STATUS_OK;
 549 }
 550
 551 static size_t CAQueueTCPData(bool isMulticast, const CAEndpoint_t *endpoint,
 552                              const void *data, size_t dataLength)
 553 {
 554     VERIFY_NON_NULL_RET(endpoint, TAG, "endpoint", -1);
 555     VERIFY_NON_NULL_RET(data, TAG, "data", -1);
 556
 557     if (0 == dataLength)
 558     {
 559         OIC_LOG(ERROR, TAG, "Invalid Data Length");
 560         return -1;
 561     }
 562
 563     VERIFY_NON_NULL_RET(g_sendQueueHandle, TAG, "sendQueueHandle", -1);
 564
 565     // Create TCPData to add to queue
 566     CATCPData *tcpData = CACreateTCPData(endpoint, data, dataLength, isMulticast);
 567     if (!tcpData)
 568     {
 569         OIC_LOG(ERROR, TAG, "Failed to create ipData!");
 570         return -1;
 571     }
 572     // Add message to send queue
 573     CAQueueingThreadAddData(g_sendQueueHandle, tcpData, sizeof(CATCPData));
 574
 575     return dataLength;
 576 }
 577
 578 int32_t CASendTCPUnicastData(const CAEndpoint_t *endpoint,
 579                              const void *data, uint32_t dataLength,
 580                              CADataType_t dataType)
 581 {
 582     OIC_LOG(DEBUG, TAG, "IN");
 583     (void)dataType;
 584 #ifndef SINGLE_THREAD
 585     return CAQueueTCPData(false, endpoint, data, dataLength);
 586 #else
 587     return CATCPSendData(endpoint, data, dataLength);
 588 #endif
 589 }
 590
 591 int32_t CASendTCPMulticastData(const CAEndpoint_t *endpoint,
 592                                const void *data, uint32_t dataLength,
 593                                CADataType_t dataType)
 594 {
 595     (void)dataType;
 596     return CAQueueTCPData(true, endpoint, data, dataLength);
 597 }
 598
 599 CAResult_t CAReadTCPData()
 600 {
 601     OIC_LOG(DEBUG, TAG, "IN");
 602 #ifdef SINGLE_THREAD
 603     CATCPPullData();
 604 #endif
 605     return CA_STATUS_OK;
 606 }
 607
 608 CAResult_t CAStopTCP()
 609 {
 610     CAIPStopNetworkMonitor(CA_ADAPTER_TCP);
 611
 612     /* Some times send queue thread fails to terminate as it's worker
 613        thread gets blocked at TCP session's socket connect operation.
 614        So closing sockets which are in connect operation at the time
 615        of termination of adapter would save send queue thread from
 616        getting blocked. */
 617     CATCPCloseInProgressConnections();
 618
 619 #ifndef SINGLE_THREAD
 620     // Stop send queue thread.
 621     if (g_sendQueueHandle && g_sendQueueHandle->threadMutex)
 622     {
 623         CAQueueingThreadStop(g_sendQueueHandle);
 624     }
 625     CATCPDeinitializeQueueHandles();
 626 #endif
 627
 628     // Close TCP servers and established connections.
 629     CATCPStopServer();
 630
 631     // Re-initializing the Globals to start them again.
 632     CAInitializeTCPGlobals();
 633
 634     return CA_STATUS_OK;
 635 }
 636
 637 void CATerminateTCP()
 638 {
 639     CATCPSetPacketReceiveCallback(NULL);
 640
 641     CATCPDestroyMutex();
 642     CATCPDestroyCond();
 643
 644     CATCPDestroySendMutex();
 645     CATCPDestroySendCond();
 646 }
 647
 648 void CATCPSendDataThread(void *threadData)
 649 {
 650     CATCPData *tcpData = (CATCPData *) threadData;
 651     if (!tcpData)
 652     {
 653         OIC_LOG(DEBUG, TAG, "Invalid TCP data!");
 654         return;
 655     }
 656
 657     if (caglobals.tcp.terminate)
 658     {
 659         OIC_LOG(DEBUG, TAG, "Adapter is not enabled");
 660         CATCPErrorHandler(tcpData->remoteEndpoint, tcpData->data, tcpData->dataLen,
 661                           CA_SEND_FAILED);
 662         return;
 663     }
 664
 665     if (tcpData->isMulticast)
 666     {
 667         //Processing for sending multicast
 668         OIC_LOG(DEBUG, TAG, "Send Multicast Data is called, not supported");
 669         return;
 670     }
 671     else
 672     {
 673 #ifdef __WITH_TLS__
 674         if (tcpData->remoteEndpoint && tcpData->remoteEndpoint->flags & CA_SECURE)
 675         {
 676             CAResult_t result = CA_STATUS_OK;
 677             OIC_LOG(DEBUG, TAG, "CAencryptSsl called!");
 678             result = CAencryptSsl(tcpData->remoteEndpoint, tcpData->data, tcpData->dataLen);
 679
 680             if (CA_STATUS_OK != result)
 681             {
 682                 OIC_LOG(ERROR, TAG, "CAAdapterNetDtlsEncrypt failed!");
 683                 CASearchAndDeleteTCPSession(tcpData->remoteEndpoint);
 684                 CATCPErrorHandler(tcpData->remoteEndpoint, tcpData->data, tcpData->dataLen,
 685                                   CA_SEND_FAILED);
 686             }
 687             OIC_LOG_V(DEBUG, TAG,
 688                       "CAAdapterNetDtlsEncrypt returned with result[%d]", result);
 689             return;
 690         }
 691 #endif
 692         //Processing for sending unicast
 693          ssize_t dlen = CATCPSendData(tcpData->remoteEndpoint, tcpData->data, tcpData->dataLen);
 694          if (-1 == dlen)
 695          {
 696              OIC_LOG(ERROR, TAG, "CATCPSendData failed");
 697              CASearchAndDeleteTCPSession(tcpData->remoteEndpoint);
 698              CATCPErrorHandler(tcpData->remoteEndpoint, tcpData->data, tcpData->dataLen,
 699                                CA_SEND_FAILED);
 700          }
 701     }
 702 }
 703
 704 CATCPData *CACreateTCPData(const CAEndpoint_t *remoteEndpoint, const void *data,
 705                            size_t dataLength, bool isMulticast)
 706 {
 707     VERIFY_NON_NULL_RET(remoteEndpoint, TAG, "remoteEndpoint is NULL", NULL);
 708     VERIFY_NON_NULL_RET(data, TAG, "data is NULL", NULL);
 709
 710     CATCPData *tcpData = (CATCPData *) OICCalloc(1, sizeof(*tcpData));
 711     if (!tcpData)
 712     {
 713         OIC_LOG(ERROR, TAG, "Memory allocation failed!");
 714         return NULL;
 715     }
 716
 717     tcpData->remoteEndpoint = CACloneEndpoint(remoteEndpoint);
 718     tcpData->data = (void *) OICMalloc(dataLength);
 719     if (!tcpData->data)
 720     {
 721         OIC_LOG(ERROR, TAG, "Memory allocation failed!");
 722         CAFreeTCPData(tcpData);
 723         return NULL;
 724     }
 725
 726     memcpy(tcpData->data, data, dataLength);
 727     tcpData->dataLen = dataLength;
 728
 729     tcpData->isMulticast = isMulticast;
 730
 731     return tcpData;
 732 }
 733
 734 void CAFreeTCPData(CATCPData *tcpData)
 735 {
 736     VERIFY_NON_NULL_VOID(tcpData, TAG, "tcpData is NULL");
 737
 738     CAFreeEndpoint(tcpData->remoteEndpoint);
 739     OICFree(tcpData->data);
 740     OICFree(tcpData);
 741 }
 742
 743 void CADataDestroyer(void *data, uint32_t size)
 744 {
 745     if (size < sizeof(CATCPData))
 746     {
 747 #ifndef __TIZENRT__
 748         OIC_LOG_V(ERROR, TAG, "Destroy data too small %p %" PRIu32, data, size);
 749 #endif
 750     }
 751     CATCPData *TCPData = (CATCPData *) data;
 752
 753     CAFreeTCPData(TCPData);
 754 }
 755
 756 #ifdef SINGLE_THREAD
 757 size_t CAGetTotalLengthFromPacketHeader(const unsigned char *recvBuffer, size_t size)
 758 {
 759     OIC_LOG(DEBUG, TAG, "IN - CAGetTotalLengthFromHeader");
 760
 761     if (NULL == recvBuffer || !size)
 762     {
 763         OIC_LOG(ERROR, TAG, "recvBuffer is NULL");
 764         return 0;
 765     }
 766
 767     coap_transport_t transport = coap_get_tcp_header_type_from_initbyte(
 768             ((unsigned char *)recvBuffer)[0] >> 4);
 769     size_t optPaylaodLen = coap_get_length_from_header((unsigned char *)recvBuffer,
 770                                                         transport);
 771     size_t headerLen = coap_get_tcp_header_length((unsigned char *)recvBuffer);
 772
 773     OIC_LOG_V(DEBUG, TAG, "option/paylaod length [%d]", optPaylaodLen);
 774     OIC_LOG_V(DEBUG, TAG, "header length [%d]", headerLen);
 775     OIC_LOG_V(DEBUG, TAG, "total data length [%d]", headerLen + optPaylaodLen);
 776
 777     OIC_LOG(DEBUG, TAG, "OUT - CAGetTotalLengthFromHeader");
 778     return headerLen + optPaylaodLen;
 779 }
 780
 781 void CAGetTCPHeaderDetails(unsigned char* recvBuffer, coap_transport_t *transport,
 782                            size_t *headerlen)
 783 {
 784     if (NULL == recvBuffer)
 785     {
 786         OIC_LOG(ERROR, TAG, "recvBuffer is NULL");
 787         return;
 788     }
 789
 790     if (NULL == transport)
 791     {
 792         OIC_LOG(ERROR, TAG, "transport is NULL");
 793         return;
 794     }
 795
 796     if (NULL == headerlen)
 797     {
 798         OIC_LOG(ERROR, TAG, "headerlen is NULL");
 799         return;
 800     }
 801
 802     *transport = coap_get_tcp_header_type_from_initbyte(
 803         ((unsigned char *)recvBuffer)[0] >> 4);
 804     *headerlen = coap_get_tcp_header_length_for_transport(*transport);
 805 }
 806 #endif