resource/csdk/connectivity/src/bt_le_adapter/tizen/caleclient.c

   1 /* ****************************************************************
   2 *
   3 * Copyright 2014 Samsung Electronics All Rights Reserved.
   4 *
   5 *
   6 *
   7 * Licensed under the Apache License, Version 2.0 (the "License");
   8 * you may not use this file except in compliance with the License.
   9 * You may obtain a copy of the License at
  10 *
  11 *      http://www.apache.org/licenses/LICENSE-2.0
  12 *
  13 * Unless required by applicable law or agreed to in writing, software
  14 * distributed under the License is distributed on an "AS IS" BASIS,
  15 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
  16 * See the License for the specific language governing permissions and
  17 * limitations under the License.
  18 *
  19 ******************************************************************/
  20
  21 #include "caleclient.h"
  22
  23 #include <stdio.h>
  24 #include <stdlib.h>
  25 #include <string.h>
  26 #include <arpa/inet.h>
  27 #include <sys/types.h>
  28 #include <sys/socket.h>
  29 #include <netinet/in.h>
  30 #include <pthread.h>
  31 #include <gio/gio.h>
  32
  33 #include "octhread.h"
  34 #include "uarraylist.h"
  35 #include "caqueueingthread.h"
  36 #include "caadapterutils.h"
  37 #include "cagattservice.h"
  38 #include "oic_string.h"
  39 #include "oic_malloc.h"
  40
  41 /**
  42  * Logging tag for module name.
  43  */
  44 #define TAG "OIC_CA_LE_CLIENT"
  45
  46 #define RETRY_COUNT 1
  47 #define MICROSECS_PER_SEC 1000000
  48 #define WAIT_TIME_WRITE_CHARACTERISTIC 10 * MICROSECS_PER_SEC
  49
  50 //For custom uuid ble server
  51 #define CA_GATT_CUSTOM_UUID "4209"
  52 #define CA_GATT_CUSTOM_UUID2 "4204"
  53 #define CUSTOM_UUID_LEN 4
  54 #define MICROSECS_PER_SEC 1000000
  55
  56 static const int samsung_code = 117;
  57 static int g_retrycount = 0;
  58 static int retry_flag = 0;
  59 uint64_t const TIMEOUT = 30 * MICROSECS_PER_SEC;
  60
  61 /**
  62  * Mutex to call connect only after disconnect during retry
  63  */
  64 static oc_mutex g_isDisconnectedMutex = NULL;
  65
  66 /**
  67  * Condition for calling connect during connection retry
  68  */
  69 static oc_cond g_LEDisconnectedCond = NULL;
  70
  71 /**
  72  * Flag to check if scanning is in progress
  73  */
  74 static bool g_isScanningInProgress = false;
  75
  76 /**
  77  * Mutex to synchronize access to g_isScanningInProgress
  78  */
  79 static oc_mutex g_isScanningInProgressMutex = NULL;
  80
  81 /**
  82  * Flag to check if connection is in progress
  83  */
  84 static bool g_isConnectionInProgress = false;
  85
  86 /**
  87  * Mutex to synchronize access to g_isConnectionInProgress
  88  */
  89 static oc_mutex g_isConnectionInProgressMutex = NULL;
  90
  91 /**
  92  * Flag to check if multicast is already in progress.
  93  */
  94 static bool g_isMulticastInProgress = false;
  95
  96 /**
  97  * Flag to check if unicast scan is in progress
  98  */
  99 static bool g_isUnicastScanInProgress = false;
 100
 101 /**
 102  * Mutex to synchronize access to g_isMulticastInProgress
 103  * and g_isUnicastScanInProgress
 104  */
 105 static oc_mutex g_scanMutex = NULL;
 106
 107 /**
 108  * Pending multicast data list to be sent.
 109  */
 110 static u_arraylist_t *g_multicastDataList = NULL;
 111
 112 /**
 113  * Mutex to synchronize the access to Pending multicast data list.
 114  */
 115 static oc_mutex g_multicastDataListMutex = NULL;
 116
 117 /**
 118  * Condition to start the timer for scanning.
 119  */
 120 static oc_cond g_startTimerCond = NULL;
 121
 122 /**
 123  * Condition for scanning Time interval.
 124  */
 125 static oc_cond g_scanningTimeCond = NULL;
 126
 127 /**
 128  * This contains the list of OIC services a client connect tot.
 129  */
 130 static LEServerInfoList *g_LEServerList = NULL;
 131
 132 /**
 133  * Mutex to synchronize access to BleServiceList.
 134  */
 135 static oc_mutex g_LEServerListMutex = NULL;
 136
 137 /**
 138  * Boolean variable to keep the state of the GATT Client.
 139  */
 140 static bool g_isLEGattClientStarted = false;
 141
 142 /**
 143  * Mutex to synchronize access to the requestResponse callback to be called
 144  * when the data needs to be sent from GATTClient.
 145  */
 146 static oc_mutex g_LEReqRespClientCbMutex = NULL;
 147
 148 /**
 149  * Mutex to synchronize access to the requestResponse callback to be called
 150  * when the data needs to be sent from GATTClient.
 151  */
 152 static oc_mutex g_LEClientConnectMutex = NULL;
 153
 154 /**
 155  * Mutex to synchronize the calls to be done to the platform from GATTClient
 156  * interfaces from different threads.
 157  */
 158 static oc_mutex g_LEClientStateMutex = NULL;
 159
 160 /**
 161  * Mutex to synchronize the task to be pushed to thread pool.
 162  */
 163 static oc_mutex g_LEClientThreadPoolMutex = NULL;
 164
 165 /**
 166  * Mutex to synchronize the task to write characteristic one packet after another.
 167  */
 168 static oc_mutex g_threadWriteCharacteristicMutex = NULL;
 169
 170 /**
 171  * Condition for Writing characteristic.
 172  */
 173 static oc_cond g_threadWriteCharacteristicCond = NULL;
 174
 175 /**
 176  * Mutex to synchronize the task for MTU Changed.
 177  */
 178 static oc_mutex g_threadMTUChangedMutex = NULL;
 179
 180 /**
 181  * Condition for MTU Changed.
 182  */
 183 static oc_cond g_threadMTUChangedCond = NULL;
 184
 185 /**
 186  * Flag to check status of write characteristic.
 187  */
 188 static bool g_isSignalSetFlag = false;
 189
 190 /**
 191  * Maintains the callback to be notified on receival of network packets from other
 192  *           BLE devices
 193  */
 194 static CABLEDataReceivedCallback g_LEClientDataReceivedCallback = NULL;
 195
 196 /**
 197  * callback to update the error to le adapter
 198  */
 199 static CABLEErrorHandleCallback g_clientErrorCallback;
 200
 201 /**
 202  * gmainLoop to manage the threads to receive the callback from the platfrom.
 203  */
 204 static GMainLoop *g_eventLoop = NULL;
 205
 206 /**
 207  * Reference to threadpool
 208  */
 209 static ca_thread_pool_t g_LEClientThreadPool = NULL;
 210
 211 void CALEGattCharacteristicChangedCb(bt_gatt_h characteristic,
 212                                      char *value,
 213                                      int valueLen, void *userData)
 214 {
 215     (void)characteristic;
 216
 217     OIC_LOG(DEBUG, TAG, "IN");
 218     OIC_LOG_V(DEBUG, TAG, "Changed characteristic value length [%d]", valueLen);
 219
 220     oc_mutex_lock(g_LEReqRespClientCbMutex);
 221     if (NULL == g_LEClientDataReceivedCallback)
 222     {
 223         OIC_LOG(ERROR, TAG, "Request response callback is not set");
 224         oc_mutex_unlock(g_LEReqRespClientCbMutex);
 225         return;
 226     }
 227
 228     uint32_t sentLength = 0;
 229     g_LEClientDataReceivedCallback(userData, (uint8_t *)value, valueLen, &sentLength);
 230
 231     OIC_LOG_V(DEBUG, TAG, "Recv data Length is %d", sentLength);
 232
 233     oc_mutex_unlock(g_LEReqRespClientCbMutex);
 234
 235     OIC_LOG(DEBUG, TAG, "OUT");
 236 }
 237
 238 void CALEGattClientMTUChangedCb(bt_gatt_client_h client_handle, const bt_gatt_client_att_mtu_info_s *mtu_info, void *user_data)
 239 {
 240     OIC_LOG(DEBUG, TAG, "IN");
 241     oc_mutex_lock(g_threadMTUChangedMutex);
 242     OIC_LOG(DEBUG, TAG, "MTU changed signal");
 243     oc_cond_signal(g_threadMTUChangedCond);
 244     oc_mutex_unlock(g_threadMTUChangedMutex);
 245     OIC_LOG(DEBUG, TAG, "OUT");
 246 }
 247
 248
 249 void CALEGattCharacteristicWriteCb(int result, bt_gatt_h reqHandle, void *userData)
 250 {
 251     (void)reqHandle;
 252     (void)userData;
 253
 254     OIC_LOG(DEBUG, TAG, "IN ");
 255
 256     if (BT_ERROR_NONE != result)
 257     {
 258         CALogSendStateInfo(CA_ADAPTER_GATT_BTLE, "", 0, -1,
 259                            false, "writeChar failure");
 260
 261         OIC_LOG(ERROR, TAG, "Write failed Need Retry ");
 262         //Need to Implement retry mechanism
 263     }
 264     else
 265     {
 266         oc_mutex_lock(g_threadWriteCharacteristicMutex);
 267         OIC_LOG(DEBUG, TAG, "g_isSignalSetFlag is set true and signal");
 268         g_isSignalSetFlag = true;
 269         oc_cond_signal(g_threadWriteCharacteristicCond);
 270         oc_mutex_unlock(g_threadWriteCharacteristicMutex);
 271
 272         CALogSendStateInfo(CA_ADAPTER_GATT_BTLE, "", 0, -1,
 273                            true, "writeChar success");
 274     }
 275
 276     OIC_LOG(DEBUG, TAG, "OUT ");
 277 }
 278
 279 CAResult_t CALEGattInitiateConnection(const char *remoteAddress)
 280 {
 281     OIC_LOG(DEBUG, TAG, "IN");
 282
 283     oc_mutex_lock(g_isConnectionInProgressMutex);
 284     if (g_isConnectionInProgress)
 285     {
 286         oc_mutex_unlock(g_isConnectionInProgressMutex);
 287         OIC_LOG(DEBUG, TAG, "Connection already in progress, cannot initiate new connection");
 288         return CA_STATUS_FAILED;
 289     }
 290     g_isConnectionInProgress = true;
 291     // Set gatt connect retry count
 292     g_retrycount = RETRY_COUNT;
 293     oc_mutex_unlock(g_isConnectionInProgressMutex);
 294
 295     // Pause the scanning
 296     CALEGattStopDeviceScanning();
 297
 298     OIC_LOG_V(DEBUG, TAG,
 299               "Trying to do Gatt connection to [%s]", remoteAddress);
 300
 301     oc_mutex_lock(g_LEClientThreadPoolMutex);
 302     if (NULL == g_LEClientThreadPool)
 303     {
 304         oc_mutex_unlock(g_LEClientThreadPoolMutex);
 305         OIC_LOG(ERROR, TAG, "g_LEClientThreadPool is NULL");
 306         return CA_STATUS_FAILED;
 307     }
 308
 309     char *addr = OICStrdup(remoteAddress);
 310     if (NULL == addr)
 311     {
 312         oc_mutex_unlock(g_LEClientThreadPoolMutex);
 313         OIC_LOG(ERROR, TAG, "OICStrdup failed");
 314         return CA_STATUS_FAILED;
 315     }
 316
 317     CAResult_t res = ca_thread_pool_add_task(g_LEClientThreadPool, CAGattConnectThread, addr, NULL);
 318     oc_mutex_unlock(g_LEClientThreadPoolMutex);
 319     if (CA_STATUS_OK != res)
 320     {
 321         OIC_LOG_V(ERROR, TAG,
 322                   "ca_thread_pool_add_task failed with ret [%d]", res);
 323         OICFree(addr);
 324         return CA_STATUS_FAILED;
 325     }
 326     OIC_LOG(DEBUG, TAG, "OUT");
 327     return CA_STATUS_OK;
 328 }
 329
 330 void CALEGattConnectionStateChanged(bool connected, const char *remoteAddress)
 331 {
 332     OIC_LOG(DEBUG, TAG, "IN ");
 333
 334     VERIFY_NON_NULL_VOID(remoteAddress, TAG, "remote address is NULL");
 335
 336     if (!connected)
 337     {
 338         OIC_LOG_V(DEBUG, TAG, "DisConnected from [%s] ", remoteAddress);
 339         if(!retry_flag)
 340         {
 341             oc_mutex_lock(g_LEServerListMutex);
 342             CARemoveLEServerInfoFromList(&g_LEServerList, remoteAddress);
 343             oc_mutex_unlock(g_LEServerListMutex);
 344         }
 345         else
 346         {
 347             oc_mutex_lock(g_isDisconnectedMutex);
 348             oc_cond_signal(g_LEDisconnectedCond);
 349             oc_mutex_unlock(g_isDisconnectedMutex);
 350         }
 351         retry_flag = 0;
 352     }
 353     else
 354     {
 355         OIC_LOG_V(DEBUG, TAG, "Connected to [%s] ", remoteAddress);
 356
 357         oc_mutex_lock(g_isConnectionInProgressMutex);
 358         g_isConnectionInProgress = false;
 359         oc_mutex_unlock(g_isConnectionInProgressMutex);
 360
 361         LEServerInfo *serverInfo = NULL;
 362         oc_mutex_lock(g_LEServerListMutex);
 363         if (CA_STATUS_OK != CAGetLEServerInfo(g_LEServerList, remoteAddress, &serverInfo))
 364         {
 365             oc_mutex_unlock(g_LEServerListMutex);
 366             OIC_LOG_V(ERROR, TAG, "Could not get server info for [%s]", remoteAddress);
 367             return;
 368         }
 369
 370         serverInfo->status = LE_STATUS_CONNECTED;
 371         oc_mutex_unlock(g_LEServerListMutex);
 372         oc_mutex_lock(g_LEClientThreadPoolMutex);
 373         if (NULL == g_LEClientThreadPool)
 374         {
 375             oc_mutex_unlock(g_LEClientThreadPoolMutex);
 376             OIC_LOG(ERROR, TAG, "g_LEClientThreadPool is NULL");
 377             return;
 378         }
 379
 380         char *addr = OICStrdup(remoteAddress);
 381         if (NULL == addr)
 382         {
 383             oc_mutex_unlock(g_LEClientThreadPoolMutex);
 384             OIC_LOG(ERROR, TAG, "addr is NULL");
 385             return;
 386         }
 387
 388         CAResult_t ret = ca_thread_pool_add_task(g_LEClientThreadPool, CADiscoverLEServicesThread,
 389                                                  addr, NULL);
 390         oc_mutex_unlock(g_LEClientThreadPoolMutex);
 391         if (CA_STATUS_OK != ret)
 392         {
 393             OIC_LOG_V(ERROR, TAG, "ca_thread_pool_add_task failed with ret [%d]", ret);
 394             OICFree(addr);
 395         }
 396     }
 397     OIC_LOG(DEBUG, TAG, "OUT");
 398 }
 399
 400 static bool CALEIsHaveServiceImpl(bt_adapter_le_device_scan_result_info_s *scanInfo,
 401                                   const char *service_uuid,
 402                                   bt_adapter_le_packet_type_e pkt_type)
 403 {
 404     bool ret = false;
 405     char **uuids = NULL;
 406     int count = 0;
 407     int result = 0;
 408
 409     result = bt_adapter_le_get_scan_result_service_uuids(scanInfo,
 410              pkt_type, &uuids, &count);
 411     if (result == BT_ERROR_NONE && NULL != uuids)
 412     {
 413         for (int i = 0; i < count; i++)
 414         {
 415             if (0 == strcasecmp(uuids[i], service_uuid))
 416             {
 417                 OIC_LOG_V(DEBUG, TAG, "Service[%s] Found in %s",
 418                           uuids[i], scanInfo->remote_address);
 419                 ret = true;
 420             }
 421             OICFree(uuids[i]);
 422         }
 423         OICFree(uuids);
 424     }
 425
 426     if(ret == false){
 427         char *man_data = NULL;
 428         int man_data_len;
 429         int man_id;
 430         result = bt_adapter_le_get_scan_result_manufacturer_data(scanInfo,
 431                               pkt_type, &man_id, &man_data, &man_data_len);
 432
 433         if (result == BT_ERROR_NONE && NULL != man_data)
 434         {
 435             int pos =0;
 436             char *compare_man_data = OICCalloc(1, (man_data_len*2)+1);
 437             if (!compare_man_data)
 438             {
 439                 OIC_LOG(ERROR, TAG, "Memory allocation failed for compare_man_data");
 440                 OICFree(man_data);
 441                 return false;
 442             }
 443
 444             for(int i=0;i<man_data_len;i++){
 445                 pos += snprintf(compare_man_data+pos, 2, "%.2x", man_data[i]);
 446             }
 447
 448             if (man_id == samsung_code && 0 == strncasecmp(compare_man_data, service_uuid, CUSTOM_UUID_LEN))
 449             {
 450                 OIC_LOG_V(DEBUG, TAG, "Manufacture Data[%s] Found in %s",
 451                                        compare_man_data, scanInfo->remote_address);
 452                 ret = true;
 453             }
 454             OICFree(compare_man_data);
 455             OICFree(man_data);
 456         }
 457     }
 458     return ret;
 459 }
 460
 461 static bool CALEIsHaveService(bt_adapter_le_device_scan_result_info_s *scanInfo,
 462                               const char *service_uuid)
 463 {
 464     return
 465         // For arduino servers, scan response will give the UUIDs advertised.
 466         CALEIsHaveServiceImpl(scanInfo, service_uuid,
 467                               BT_ADAPTER_LE_PACKET_SCAN_RESPONSE) ||
 468         // For android/tizen servers, advertising packet will give the UUIDs.
 469         CALEIsHaveServiceImpl(scanInfo, service_uuid,
 470                               BT_ADAPTER_LE_PACKET_ADVERTISING);
 471 }
 472
 473 void CALEAdapterScanResultCb(int result, bt_adapter_le_device_scan_result_info_s *scanInfo,
 474                              void *userData)
 475 {
 476     (void)userData;
 477     OIC_LOG(DEBUG, TAG, "IN");
 478
 479     VERIFY_NON_NULL_VOID(scanInfo, TAG, "scanInfo");
 480     VERIFY_NON_NULL_VOID(scanInfo->remote_address, TAG, "scanInfo->remote_address");
 481
 482     OIC_LOG_V(DEBUG, TAG, "Remote Address [%s]", scanInfo->remote_address);
 483     OIC_LOG_V(DEBUG, TAG, "Scan Result [%d]", result);
 484     OIC_LOG_V(DEBUG, TAG,
 485               " Adv data len [%d] Scan data len[%d]RSSI [%d] Addr_type [%d] ",
 486               scanInfo->adv_data_len, scanInfo->scan_data_len, scanInfo->rssi,
 487               scanInfo->address_type);
 488
 489     // Check if scanning was stopped (since this callback is
 490     // being triggered even after stopping the scan)
 491     oc_mutex_lock(g_isScanningInProgressMutex);
 492     if (!g_isScanningInProgress)
 493     {
 494         oc_mutex_unlock(g_isScanningInProgressMutex);
 495         OIC_LOG(DEBUG, TAG, "Scanning not in progress, so ignoring callback");
 496         return;
 497     }
 498     oc_mutex_unlock(g_isScanningInProgressMutex);
 499
 500     if (CALEIsHaveService(scanInfo, CA_GATT_SERVICE_UUID) ||
 501         CALEIsHaveService(scanInfo, CA_GATT_CUSTOM_UUID)||
 502         CALEIsHaveService(scanInfo, CA_GATT_CUSTOM_UUID2))
 503     {
 504         OIC_LOG_V(DEBUG, TAG, "Device [%s] supports OIC or custom service", scanInfo->remote_address);
 505
 506         LEServerInfo *serverInfo = NULL;
 507         oc_mutex_lock(g_LEServerListMutex);
 508         CAResult_t ret = CAGetLEServerInfo(g_LEServerList, scanInfo->remote_address, &serverInfo);
 509         if (CA_STATUS_OK != ret)
 510         {
 511             OIC_LOG_V(DEBUG, TAG,
 512                       "Newly discovered device with address [%s] ", scanInfo->remote_address);
 513
 514             char *addr = OICStrdup(scanInfo->remote_address);
 515             if (NULL == addr)
 516             {
 517                 oc_mutex_unlock(g_LEServerListMutex);
 518                 OIC_LOG(ERROR, TAG, "Device address is NULL");
 519                 return;
 520             }
 521             serverInfo = (LEServerInfo *)OICCalloc(1, sizeof(LEServerInfo));
 522             if (NULL == serverInfo)
 523             {
 524                 oc_mutex_unlock(g_LEServerListMutex);
 525                 OIC_LOG(ERROR, TAG, "Calloc failed");
 526                 OICFree(addr);
 527                 return;
 528             }
 529             serverInfo->remoteAddress = addr;
 530             serverInfo->status = LE_STATUS_DISCOVERED;
 531
 532             if (CA_STATUS_OK != CAAddLEServerInfoToList(&g_LEServerList, serverInfo))
 533             {
 534                 oc_mutex_unlock(g_LEServerListMutex);
 535                 OIC_LOG_V(ERROR, TAG, "Could not add [%s] to server list", scanInfo->remote_address);
 536                 CAFreeLEServerInfo(serverInfo);
 537                 return;
 538             }
 539         }else {
 540             OIC_LOG_V(DEBUG, TAG,
 541                       "Device Present with address [%s] ", scanInfo->remote_address);
 542
 543             if(serverInfo->status == LE_STATUS_UNICAST_PENDING){
 544                 bt_gatt_client_h clientHandle = NULL;
 545                 int32_t ret = bt_gatt_client_create(serverInfo->remoteAddress, &clientHandle);
 546                 if (BT_ERROR_NONE != ret || NULL == clientHandle)
 547                 {
 548                     OIC_LOG_V(ERROR, TAG,
 549                               "bt_gatt_client_create Failed with ret value [%s] ", CALEGetErrorMsg(ret));
 550                     CALEGattDisConnect(serverInfo->remoteAddress);
 551                     oc_mutex_unlock(g_LEServerListMutex);
 552                     return ;
 553                 }
 554                 serverInfo->clientHandle = clientHandle;
 555
 556                 serverInfo->status = LE_STATUS_CONNECTION_INITIATED;
 557                 if (CA_STATUS_OK != CALEGattInitiateConnection(serverInfo->remoteAddress))
 558                 {
 559                     OIC_LOG_V(ERROR, TAG, "Could not initiate connection to [%s]", serverInfo->remoteAddress);
 560                     serverInfo->status = LE_STATUS_DISCOVERED;
 561                     CADestroyLEDataList(&serverInfo->pendingDataList);
 562                     oc_mutex_unlock(g_LEServerListMutex);
 563                     return ;
 564                 }
 565             }
 566         }
 567         oc_mutex_unlock(g_LEServerListMutex);
 568     }
 569
 570     OIC_LOG(DEBUG, TAG, "OUT");
 571 }
 572
 573 void CASetLEClientThreadPoolHandle(ca_thread_pool_t handle)
 574 {
 575     OIC_LOG(DEBUG, TAG, "IN");
 576
 577     oc_mutex_lock(g_LEClientThreadPoolMutex);
 578     g_LEClientThreadPool = handle;
 579     oc_mutex_unlock(g_LEClientThreadPoolMutex);
 580
 581     OIC_LOG(DEBUG, TAG, "OUT");
 582 }
 583
 584 void CASetLEReqRespClientCallback(CABLEDataReceivedCallback callback)
 585 {
 586     OIC_LOG(DEBUG, TAG, "IN");
 587
 588     oc_mutex_lock(g_LEReqRespClientCbMutex);
 589
 590     g_LEClientDataReceivedCallback = callback;
 591
 592     oc_mutex_unlock(g_LEReqRespClientCbMutex);
 593
 594     OIC_LOG(DEBUG, TAG, "OUT");
 595 }
 596
 597 void CASetBLEClientErrorHandleCallback(CABLEErrorHandleCallback callback)
 598 {
 599     g_clientErrorCallback = callback;
 600 }
 601
 602 CAResult_t CAStartLEGattClient()
 603 {
 604     OIC_LOG(DEBUG, TAG, "IN");
 605
 606     oc_mutex_lock(g_LEClientStateMutex);
 607     if (true  == g_isLEGattClientStarted)
 608     {
 609         OIC_LOG(ERROR, TAG, "Gatt Client is already running!!");
 610         oc_mutex_unlock(g_LEClientStateMutex);
 611         return CA_STATUS_FAILED;
 612     }
 613
 614     CAResult_t  result = CALEGattSetCallbacks();
 615     if (CA_STATUS_OK != result)
 616     {
 617         OIC_LOG(ERROR, TAG, "CABleGattSetCallbacks Failed");
 618         oc_mutex_unlock(g_LEClientStateMutex);
 619         CATerminateLEGattClient();
 620         return CA_STATUS_FAILED;
 621     }
 622
 623     g_isLEGattClientStarted = true;
 624     oc_mutex_unlock(g_LEClientStateMutex);
 625
 626     oc_mutex_lock(g_LEClientThreadPoolMutex);
 627     if (NULL == g_LEClientThreadPool)
 628     {
 629         OIC_LOG(ERROR, TAG, "gBleServerThreadPool is NULL");
 630         CATerminateGattClientMutexVariables();
 631         oc_mutex_unlock(g_LEClientThreadPoolMutex);
 632         return CA_STATUS_FAILED;
 633     }
 634
 635     result = ca_thread_pool_add_task(g_LEClientThreadPool, CAStartTimerThread,
 636                                      NULL, NULL);
 637     if (CA_STATUS_OK != result)
 638     {
 639         OIC_LOG(ERROR, TAG, "ca_thread_pool_add_task failed");
 640         CATerminateGattClientMutexVariables();
 641         oc_mutex_unlock(g_LEClientThreadPoolMutex);
 642         return CA_STATUS_FAILED;
 643     }
 644
 645 #ifdef TIZEN_VD
 646     result= ca_thread_pool_add_task(g_LEClientThreadPool, CALEClientScanThread,
 647                                     NULL, NULL);
 648     if (CA_STATUS_OK != result)
 649     {
 650         OIC_LOG(ERROR, TAG, "ca_thread_pool_add_task failed");
 651         CATerminateGattClientMutexVariables();
 652         oc_mutex_unlock(g_LEClientThreadPoolMutex);
 653         return CA_STATUS_FAILED;
 654     }
 655 #endif
 656     oc_mutex_unlock(g_LEClientThreadPoolMutex);
 657
 658     OIC_LOG(DEBUG, TAG, "OUT");
 659     return CA_STATUS_OK;
 660 }
 661
 662 #ifdef TIZEN_VD
 663 void CALEClientScanThread()
 664 {
 665     oc_mutex_lock(g_scanMutex);
 666     if (!g_isMulticastInProgress && !g_isUnicastScanInProgress)
 667     {
 668         CAResult_t result = CALEGattStartDeviceScanning();
 669         if (CA_STATUS_OK != result)
 670         {
 671             oc_mutex_unlock(g_scanMutex);
 672             OIC_LOG(ERROR, TAG, "CALEGattStartDeviceScanning failed");
 673             return ;
 674         }
 675         g_isUnicastScanInProgress = true;
 676         // Start Timer
 677         oc_cond_signal(g_startTimerCond);
 678     }
 679     else
 680     {
 681         g_isUnicastScanInProgress = true;
 682         // Reset Timer
 683         oc_cond_signal(g_scanningTimeCond);
 684     }
 685     oc_mutex_unlock(g_scanMutex);
 686
 687     OIC_LOG(DEBUG, TAG, "OUT");
 688     return ;
 689 }
 690 #endif
 691
 692 void CAStartTimerThread(void *data)
 693 {
 694     (void)data;
 695
 696     OIC_LOG(DEBUG, TAG, "IN");
 697     while (g_isLEGattClientStarted)
 698     {
 699         oc_mutex_lock(g_scanMutex);
 700         if (!g_isMulticastInProgress && !g_isUnicastScanInProgress)
 701         {
 702             OIC_LOG(DEBUG, TAG, "waiting....");
 703             oc_cond_wait(g_startTimerCond, g_scanMutex);
 704             OIC_LOG(DEBUG, TAG, "Wake up");
 705         }
 706
 707         // Timed conditional wait for stopping the scan.
 708         OCWaitResult_t ret = oc_cond_wait_for(g_scanningTimeCond, g_scanMutex,
 709                                               TIMEOUT);
 710         if (OC_WAIT_TIMEDOUT == ret)
 711         {
 712             OIC_LOG(DEBUG, TAG, "Scan is timed Out");
 713             // Call stop scan.
 714             CALEGattStopDeviceScanning();
 715
 716             if (g_isMulticastInProgress)
 717             {
 718                 oc_mutex_lock(g_multicastDataListMutex);
 719                 // Clear the data list and device list.
 720                 u_arraylist_destroy(g_multicastDataList);
 721                 g_multicastDataList = NULL;
 722                 oc_mutex_unlock(g_multicastDataListMutex);
 723                 g_isMulticastInProgress = false;
 724             }
 725             g_isUnicastScanInProgress = false;
 726         }
 727         oc_mutex_unlock(g_scanMutex);
 728     }
 729
 730     OIC_LOG(DEBUG, TAG, "OUT");
 731 }
 732
 733 void CAStopLEGattClient()
 734 {
 735     OIC_LOG(DEBUG,  TAG, "IN");
 736
 737     oc_mutex_lock(g_LEClientStateMutex);
 738
 739     if (false == g_isLEGattClientStarted)
 740     {
 741         OIC_LOG(ERROR, TAG, "Gatt Client is not running to stop");
 742         oc_mutex_unlock(g_LEClientStateMutex);
 743         return;
 744     }
 745
 746     CALEGattUnSetCallbacks();
 747
 748     CALEGattStopDeviceScanning();
 749
 750     g_isLEGattClientStarted = false;
 751
 752     // Signal the conditions waiting in Start timer.
 753     oc_cond_signal(g_startTimerCond);
 754     oc_cond_signal(g_scanningTimeCond);
 755
 756     // Destroy the multicast data list and device list if not empty.
 757     if (NULL != g_multicastDataList)
 758     {
 759         oc_mutex_lock(g_multicastDataListMutex);
 760         u_arraylist_destroy(g_multicastDataList);
 761         g_multicastDataList = NULL;
 762         oc_mutex_unlock(g_multicastDataListMutex);
 763     }
 764
 765     oc_mutex_lock(g_LEServerListMutex);
 766     CAFreeLEServerList(g_LEServerList);
 767     g_LEServerList = NULL;
 768     oc_mutex_unlock(g_LEServerListMutex);
 769
 770     oc_mutex_lock(g_threadWriteCharacteristicMutex);
 771     oc_cond_signal(g_threadWriteCharacteristicCond);
 772     oc_mutex_unlock(g_threadWriteCharacteristicMutex);
 773
 774     GMainContext  *context_event_loop = NULL;
 775     // Required for waking up the thread which is running in gmain loop
 776     if (NULL != g_eventLoop)
 777     {
 778         context_event_loop = g_main_loop_get_context(g_eventLoop);
 779     }
 780     if (context_event_loop)
 781     {
 782         OIC_LOG_V(DEBUG,  TAG, "g_eventLoop context %p", (void *)context_event_loop);
 783         g_main_context_wakeup(context_event_loop);
 784
 785         // Kill g main loops and kill threads.
 786         g_main_loop_quit(g_eventLoop);
 787     }
 788     else
 789     {
 790         OIC_LOG(ERROR, TAG, "g_eventLoop context is NULL");
 791     }
 792
 793     oc_mutex_unlock(g_LEClientStateMutex);
 794
 795     OIC_LOG(DEBUG,  TAG, "OUT");
 796 }
 797
 798 CAResult_t CAInitializeLEGattClient()
 799 {
 800     OIC_LOG(DEBUG, TAG, "Initialize GATT Client");
 801     CAResult_t res = CAInitGattClientMutexVariables();
 802     if (CA_STATUS_OK != res)
 803     {
 804         OIC_LOG(ERROR, TAG, "CAInitGattClientMutexVariables failed!");
 805         CATerminateGattClientMutexVariables();
 806         return CA_STATUS_FAILED;
 807     }
 808     return res;
 809 }
 810
 811 void CATerminateLEGattClient()
 812 {
 813     OIC_LOG(DEBUG,  TAG, "IN");
 814
 815     CATerminateGattClientMutexVariables();
 816
 817     OIC_LOG(DEBUG,  TAG, "OUT");
 818 }
 819
 820 CAResult_t CAInitGattClientMutexVariables()
 821 {
 822     OIC_LOG(DEBUG,  TAG, "IN");
 823     if (NULL == g_LEClientStateMutex)
 824     {
 825         g_LEClientStateMutex = oc_mutex_new();
 826         if (NULL == g_LEClientStateMutex)
 827         {
 828             OIC_LOG(ERROR, TAG, "oc_mutex_new failed");
 829             return CA_STATUS_FAILED;
 830         }
 831     }
 832
 833     if (NULL == g_LEServerListMutex)
 834     {
 835         g_LEServerListMutex = oc_mutex_new();
 836         if (NULL == g_LEServerListMutex)
 837         {
 838             OIC_LOG(ERROR, TAG, "oc_mutex_new failed");
 839             return CA_STATUS_FAILED;
 840         }
 841     }
 842
 843     if (NULL == g_LEReqRespClientCbMutex)
 844     {
 845         g_LEReqRespClientCbMutex = oc_mutex_new();
 846         if (NULL == g_LEReqRespClientCbMutex)
 847         {
 848             OIC_LOG(ERROR, TAG, "oc_mutex_new failed");
 849             return CA_STATUS_FAILED;
 850         }
 851     }
 852
 853     if (NULL == g_LEClientThreadPoolMutex)
 854     {
 855         g_LEClientThreadPoolMutex = oc_mutex_new();
 856         if (NULL == g_LEClientThreadPoolMutex)
 857         {
 858             OIC_LOG(ERROR, TAG, "oc_mutex_new failed");
 859             return CA_STATUS_FAILED;
 860         }
 861     }
 862
 863     if (NULL == g_LEClientConnectMutex)
 864     {
 865         g_LEClientConnectMutex = oc_mutex_new();
 866         if (NULL == g_LEClientConnectMutex)
 867         {
 868             OIC_LOG(ERROR, TAG, "oc_mutex_new failed");
 869             return CA_STATUS_FAILED;
 870         }
 871     }
 872
 873     if (NULL == g_isScanningInProgressMutex)
 874     {
 875         g_isScanningInProgressMutex = oc_mutex_new();
 876         if (NULL == g_isScanningInProgressMutex)
 877         {
 878             OIC_LOG(ERROR, TAG, "oc_mutex_new failed");
 879             return CA_STATUS_FAILED;
 880         }
 881     }
 882
 883     if (NULL == g_isConnectionInProgressMutex)
 884     {
 885         g_isConnectionInProgressMutex = oc_mutex_new();
 886         if (NULL == g_isConnectionInProgressMutex)
 887         {
 888             OIC_LOG(ERROR, TAG, "oc_mutex_new failed");
 889             return CA_STATUS_FAILED;
 890         }
 891     }
 892
 893     if (NULL == g_multicastDataListMutex)
 894     {
 895         g_multicastDataListMutex = oc_mutex_new();
 896         if (NULL == g_multicastDataListMutex)
 897         {
 898             OIC_LOG(ERROR, TAG, "oc_mutex_new failed");
 899             return CA_STATUS_FAILED;
 900         }
 901     }
 902
 903     if (NULL == g_scanMutex)
 904     {
 905         g_scanMutex = oc_mutex_new();
 906         if (NULL == g_scanMutex)
 907         {
 908             OIC_LOG(ERROR, TAG, "oc_mutex_new failed");
 909             return CA_STATUS_FAILED;
 910         }
 911     }
 912
 913     if (NULL == g_threadWriteCharacteristicMutex)
 914     {
 915         g_threadWriteCharacteristicMutex = oc_mutex_new();
 916         if (NULL == g_threadWriteCharacteristicMutex)
 917         {
 918             OIC_LOG(ERROR, TAG, "oc_mutex_new has failed");
 919             return CA_STATUS_FAILED;
 920         }
 921     }
 922
 923     if (NULL == g_threadMTUChangedMutex)
 924     {
 925         g_threadMTUChangedMutex = oc_mutex_new();
 926         if (NULL == g_threadMTUChangedMutex)
 927         {
 928             OIC_LOG(ERROR, TAG, "oc_mutex_new has failed");
 929             return CA_STATUS_FAILED;
 930         }
 931     }
 932
 933     if (NULL == g_isDisconnectedMutex)
 934     {
 935         g_isDisconnectedMutex = oc_mutex_new();
 936         if (NULL == g_isDisconnectedMutex)
 937         {
 938             OIC_LOG(ERROR, TAG, "oc_mutex_new has failed");
 939             return CA_STATUS_FAILED;
 940         }
 941     }
 942
 943     if (NULL == g_LEDisconnectedCond)
 944     {
 945         g_LEDisconnectedCond = oc_cond_new();
 946         if (NULL == g_LEDisconnectedCond)
 947         {
 948             OIC_LOG(ERROR, TAG, "oc_cond_new failed");
 949             return CA_STATUS_FAILED;
 950         }
 951     }
 952
 953     if (NULL == g_startTimerCond)
 954     {
 955         g_startTimerCond = oc_cond_new();
 956         if (NULL == g_startTimerCond)
 957         {
 958             OIC_LOG(ERROR, TAG, "oc_cond_new failed");
 959             return CA_STATUS_FAILED;
 960         }
 961     }
 962
 963     if (NULL == g_scanningTimeCond)
 964     {
 965         g_scanningTimeCond = oc_cond_new();
 966         if (NULL == g_scanningTimeCond)
 967         {
 968             OIC_LOG(ERROR, TAG, "oc_cond_new failed");
 969             return CA_STATUS_FAILED;
 970         }
 971     }
 972
 973     if (NULL == g_threadWriteCharacteristicCond)
 974     {
 975         g_threadWriteCharacteristicCond = oc_cond_new();
 976         if (NULL == g_threadWriteCharacteristicCond)
 977         {
 978             OIC_LOG(ERROR, TAG, "oc_cond_new failed");
 979             return CA_STATUS_FAILED;
 980         }
 981     }
 982
 983     if (NULL == g_threadMTUChangedCond)
 984     {
 985         g_threadMTUChangedCond = oc_cond_new();
 986         if (NULL == g_threadMTUChangedCond)
 987         {
 988             OIC_LOG(ERROR, TAG, "oc_cond_new failed");
 989             return CA_STATUS_FAILED;
 990         }
 991     }
 992
 993
 994     OIC_LOG(DEBUG,  TAG, "OUT");
 995     return CA_STATUS_OK;
 996 }
 997
 998 void CATerminateGattClientMutexVariables()
 999 {
1000     OIC_LOG(DEBUG,  TAG, "IN");
1001
1002     oc_mutex_free(g_LEClientStateMutex);
1003     g_LEClientStateMutex = NULL;
1004
1005     oc_mutex_free(g_LEServerListMutex);
1006     g_LEServerListMutex = NULL;
1007
1008     oc_mutex_free(g_LEReqRespClientCbMutex);
1009     g_LEReqRespClientCbMutex = NULL;
1010
1011     oc_mutex_free(g_LEClientConnectMutex);
1012     g_LEClientConnectMutex = NULL;
1013
1014     oc_mutex_free(g_LEClientThreadPoolMutex);
1015     g_LEClientThreadPoolMutex = NULL;
1016
1017     oc_mutex_free(g_isScanningInProgressMutex);
1018     g_isScanningInProgressMutex = NULL;
1019
1020     oc_mutex_free(g_isConnectionInProgressMutex);
1021     g_isConnectionInProgressMutex = NULL;
1022
1023     oc_mutex_free(g_multicastDataListMutex);
1024     g_multicastDataListMutex = NULL;
1025
1026     oc_mutex_free(g_scanMutex);
1027     g_scanMutex = NULL;
1028
1029     oc_mutex_free(g_threadWriteCharacteristicMutex);
1030     g_threadWriteCharacteristicMutex = NULL;
1031
1032     oc_mutex_free(g_threadMTUChangedMutex);
1033     g_threadMTUChangedMutex = NULL;
1034
1035     oc_mutex_free(g_isDisconnectedMutex);
1036     g_isDisconnectedMutex = NULL;
1037
1038     oc_cond_free(g_LEDisconnectedCond);
1039     g_LEDisconnectedCond = NULL;
1040
1041     oc_cond_free(g_startTimerCond);
1042     g_startTimerCond = NULL;
1043
1044     oc_cond_free(g_scanningTimeCond);
1045     g_scanningTimeCond = NULL;
1046
1047     oc_cond_free(g_threadWriteCharacteristicCond);
1048     g_threadWriteCharacteristicCond = NULL;
1049     g_isSignalSetFlag = false;
1050
1051     oc_cond_free(g_threadMTUChangedCond);
1052     g_threadMTUChangedCond = NULL;
1053
1054     OIC_LOG(DEBUG,  TAG, "OUT");
1055 }
1056
1057 CAResult_t CALEGattSetCallbacks()
1058 {
1059     OIC_LOG(DEBUG, TAG, "IN");
1060
1061     OIC_LOG(DEBUG, TAG, "OUT");
1062     return CA_STATUS_OK;
1063 }
1064
1065 void CALEGattUnSetCallbacks()
1066 {
1067     OIC_LOG(DEBUG, TAG, "IN");
1068
1069     bt_gatt_unset_connection_state_changed_cb();
1070
1071     oc_mutex_lock(g_LEServerListMutex);
1072     LEServerInfoList *curNode = g_LEServerList;
1073     while (curNode)
1074     {
1075         LEServerInfo *serverInfo = curNode->serverInfo;
1076         if (serverInfo->status >= LE_STATUS_SERVICES_DISCOVERED)
1077         {
1078             bt_gatt_client_unset_characteristic_value_changed_cb(serverInfo->readChar);
1079         }
1080         curNode = curNode->next;
1081     }
1082     oc_mutex_unlock(g_LEServerListMutex);
1083
1084     OIC_LOG(DEBUG, TAG, "OUT");
1085 }
1086
1087 CAResult_t CALEGattStartDeviceScanning()
1088 {
1089     OIC_LOG(DEBUG, TAG, "IN");
1090
1091     oc_mutex_lock(g_isScanningInProgressMutex);
1092     if (!g_isScanningInProgress)
1093     {
1094         int ret = bt_adapter_le_start_scan(CALEAdapterScanResultCb, NULL);
1095         if (BT_ERROR_NONE != ret)
1096         {
1097             oc_mutex_unlock(g_isScanningInProgressMutex);
1098             OIC_LOG_V(ERROR, TAG, "bt_adapter_le_start_scan failed[%s]",
1099                       CALEGetErrorMsg(ret));
1100             return CA_STATUS_FAILED;
1101         }
1102         g_isScanningInProgress = true;
1103     }
1104     else
1105     {
1106         OIC_LOG(DEBUG, TAG, "Ignore, scanning already in progress");
1107     }
1108     oc_mutex_unlock(g_isScanningInProgressMutex);
1109
1110     OIC_LOG(DEBUG, TAG, "OUT");
1111     return CA_STATUS_OK;
1112 }
1113
1114 void CALEGattStopDeviceScanning()
1115 {
1116     OIC_LOG(DEBUG, TAG, "IN");
1117
1118     oc_mutex_lock(g_isScanningInProgressMutex);
1119     if (g_isScanningInProgress)
1120     {
1121         int ret = bt_adapter_le_stop_scan();
1122         if (BT_ERROR_NONE != ret)
1123         {
1124             oc_mutex_unlock(g_isScanningInProgressMutex);
1125             OIC_LOG_V(ERROR, TAG, "bt_adapter_le_stop_scan failed[%s]",
1126                       CALEGetErrorMsg(ret));
1127             return;
1128         }
1129         g_isScanningInProgress = false;
1130         g_isUnicastScanInProgress= false;
1131     }
1132     else
1133     {
1134         OIC_LOG(DEBUG, TAG, "Ignore, scanning not in progress");
1135     }
1136     oc_mutex_unlock(g_isScanningInProgressMutex);
1137
1138     OIC_LOG(DEBUG, TAG, "OUT");
1139 }
1140
1141 void CAGattConnectThread (void *remoteAddress)
1142 {
1143     OIC_LOG(DEBUG, TAG, "IN ");
1144
1145     VERIFY_NON_NULL_VOID(remoteAddress, TAG, "remote address is NULL");
1146
1147     char *address  = (char *)remoteAddress;
1148
1149     OIC_LOG_V(DEBUG, TAG, "remote address is [%s]", address);
1150
1151     CAResult_t result = CALEGattConnect(address);
1152
1153     if (CA_STATUS_OK != result)
1154     {
1155         OIC_LOG_V(ERROR, TAG, "bt_gatt_connect failed for [%s]", address);
1156     }
1157
1158     OICFree(address);
1159
1160     OIC_LOG(DEBUG, TAG, "OUT");
1161 }
1162
1163 CAResult_t CALEGattConnect(const char *remoteAddress)
1164 {
1165     OIC_LOG(DEBUG, TAG, "IN");
1166
1167     VERIFY_NON_NULL_RET(remoteAddress, TAG,
1168                         "remote address is NULL", CA_STATUS_FAILED);
1169
1170     oc_mutex_lock(g_LEClientConnectMutex);
1171     CAResult_t result = CA_STATUS_OK;
1172
1173 #ifdef TIZEN_VD
1174     int ret = bt_gatt_connect(remoteAddress, true);
1175 #else
1176     int ret = bt_gatt_connect(remoteAddress, false);
1177 #endif
1178     if (BT_ERROR_NONE != ret)
1179     {
1180         OIC_LOG_V(ERROR, TAG, "bt_gatt_connect Failed with ret value [%s] ",
1181                   CALEGetErrorMsg(ret));
1182         oc_mutex_unlock(g_LEClientConnectMutex);
1183         return CA_STATUS_FAILED;
1184     }
1185
1186     oc_mutex_unlock(g_LEClientConnectMutex);
1187
1188     OIC_LOG(DEBUG, TAG, "OUT");
1189     return result;
1190 }
1191
1192 CAResult_t CALEGattDisConnect(const char *remoteAddress)
1193 {
1194     OIC_LOG(DEBUG, TAG, "IN");
1195
1196     VERIFY_NON_NULL_RET(remoteAddress, TAG,
1197                         "remote address is NULL", CA_STATUS_FAILED);
1198
1199     int ret = bt_gatt_disconnect(remoteAddress);
1200
1201     if (BT_ERROR_NONE != ret)
1202     {
1203         OIC_LOG_V(ERROR, TAG, "bt_gatt_disconnect Failed with ret value [%s] ",
1204                   CALEGetErrorMsg(ret));
1205         return CA_STATUS_FAILED;
1206     }
1207
1208     OIC_LOG(DEBUG, TAG, "OUT");
1209     return CA_STATUS_OK;
1210 }
1211
1212 CAResult_t CAUpdateCharacteristicsToGattServerImpl(LEServerInfo *serverInfo,
1213         const uint8_t *data, const uint32_t dataLen)
1214 {
1215     OIC_LOG(DEBUG, TAG, "IN");
1216
1217     VERIFY_NON_NULL(serverInfo, TAG, "Server Info is NULL");
1218
1219     CALEGattStopDeviceScanning();
1220
1221     OIC_LOG_V(DEBUG, TAG, "Updating the data of length [%d] to [%s] ", dataLen,
1222               serverInfo->remoteAddress);
1223
1224     int result = bt_gatt_set_value(serverInfo->writeChar, (char *)data, dataLen);
1225
1226     if (BT_ERROR_NONE != result)
1227     {
1228         OIC_LOG_V(ERROR, TAG,
1229                   "bt_gatt_set_value Failed with return val [%s]",
1230                   CALEGetErrorMsg(result));
1231         goto exit;
1232     }
1233
1234     result = bt_gatt_client_write_value(serverInfo->writeChar, CALEGattCharacteristicWriteCb,
1235                                         NULL);
1236     if (BT_ERROR_NONE != result)
1237     {
1238         OIC_LOG_V(ERROR, TAG,
1239                   "bt_gatt_client_write_value Failed with return val [%s]",
1240                   CALEGetErrorMsg(result));
1241         goto exit;
1242     }
1243
1244     // wait for callback for write Characteristic with success to sent data
1245     OIC_LOG_V(DEBUG, TAG, "callback flag is %d", g_isSignalSetFlag);
1246     oc_mutex_lock(g_threadWriteCharacteristicMutex);
1247     if (!g_isSignalSetFlag)
1248     {
1249         OIC_LOG(DEBUG, TAG, "wait for callback to notify writeCharacteristic is success");
1250         if (OC_WAIT_SUCCESS != oc_cond_wait_for(g_threadWriteCharacteristicCond,
1251                                                 g_threadWriteCharacteristicMutex,
1252                                                 WAIT_TIME_WRITE_CHARACTERISTIC))
1253         {
1254             g_isSignalSetFlag = false;
1255             oc_mutex_unlock(g_threadWriteCharacteristicMutex);
1256             OIC_LOG(ERROR, TAG, "there is no response. write has failed");
1257             goto exit;
1258         }
1259     }
1260     // reset flag set by writeCharacteristic Callback
1261     g_isSignalSetFlag = false;
1262     oc_mutex_unlock(g_threadWriteCharacteristicMutex);
1263
1264     oc_mutex_lock(g_scanMutex);
1265     if (g_isMulticastInProgress || g_isUnicastScanInProgress)
1266     {
1267         if (CA_STATUS_OK != CALEGattStartDeviceScanning())
1268         {
1269             OIC_LOG(ERROR, TAG, "Could not start device scanning");
1270         }
1271     }
1272     oc_mutex_unlock(g_scanMutex);
1273     OIC_LOG(DEBUG, TAG, "OUT");
1274     return CA_STATUS_OK;
1275
1276 exit:
1277     oc_mutex_lock(g_scanMutex);
1278     if (g_isMulticastInProgress || g_isUnicastScanInProgress)
1279     {
1280         if (CA_STATUS_OK != CALEGattStartDeviceScanning())
1281         {
1282             OIC_LOG(ERROR, TAG, "Could not start device scanning");
1283         }
1284     }
1285     oc_mutex_unlock(g_scanMutex);
1286
1287     OIC_LOG(DEBUG, TAG, "OUT");
1288     return CA_STATUS_FAILED;
1289 }
1290
1291 void CADiscoverLEServicesThread(void *remoteAddress)
1292 {
1293     OIC_LOG(DEBUG, TAG, "IN");
1294
1295     VERIFY_NON_NULL_VOID(remoteAddress, TAG, "remote address is NULL");
1296
1297     char *address  = (char *)remoteAddress;
1298
1299     CAResult_t result = CALEGattDiscoverServices(address);
1300     if (CA_STATUS_OK != result)
1301     {
1302         OIC_LOG(ERROR, TAG, "CALEGattDiscoverServices failed");
1303     }
1304
1305     OICFree(address);
1306     OIC_LOG(DEBUG, TAG, "OUT");
1307 }
1308
1309 static int CALEWaittillDisconnect(oc_mutex mutex, oc_cond cv, int wait_seconds)
1310 {
1311     OIC_LOG(DEBUG, TAG, "Waiting for server to be disconnected...");
1312     oc_mutex_lock(mutex);
1313     uint64_t wait_time = wait_seconds * MICROSECS_PER_SEC;
1314     int ret = oc_cond_wait_for(cv, mutex, wait_time);
1315     oc_mutex_unlock(mutex);
1316     return ret;
1317 }
1318
1319 static CAResult_t CALEGattConnectionRetry(const char *remoteAddress)
1320 {
1321     OIC_LOG(DEBUG, TAG, "IN");
1322
1323     VERIFY_NON_NULL_VOID(remoteAddress, TAG, "remote address is NULL")
1324
1325     CALEGattDisConnect(remoteAddress);
1326     CALEWaittillDisconnect(g_isDisconnectedMutex, g_LEDisconnectedCond, 10);
1327     CAResult_t result = CALEGattConnect(remoteAddress);
1328     OIC_LOG(DEBUG, TAG, "OUT");
1329     return result;
1330 }
1331
1332 CAResult_t CALEGattDiscoverServices(const char *remoteAddress)
1333 {
1334     OIC_LOG(DEBUG, TAG, "IN");
1335
1336     VERIFY_NON_NULL_RET(remoteAddress, TAG,
1337                         "remote address is NULL", CA_STATUS_FAILED);
1338
1339     LEServerInfo *serverInfo = NULL;
1340     unsigned int mtu_size;
1341     oc_mutex_lock(g_LEServerListMutex);
1342     if (CA_STATUS_OK != CAGetLEServerInfo(g_LEServerList, remoteAddress, &serverInfo))
1343     {
1344         oc_mutex_unlock(g_LEServerListMutex);
1345         OIC_LOG_V(ERROR, TAG, "Could not get server info for [%s]", remoteAddress);
1346         CALEGattDisConnect(remoteAddress);
1347         return CA_STATUS_FAILED;
1348     }
1349
1350     bt_gatt_h serviceHandle = NULL;
1351     int32_t ret = bt_gatt_client_get_service(serverInfo->clientHandle, CA_GATT_SERVICE_UUID, &serviceHandle);
1352     if (BT_ERROR_NONE != ret || NULL == serviceHandle)
1353     {
1354         OIC_LOG_V(ERROR, TAG,
1355                   "bt_gatt_client_get_service Failed with ret value [%s] ", CALEGetErrorMsg(ret));
1356
1357         if(g_retrycount)
1358         {
1359             OIC_LOG(DEBUG, TAG, "Retry will be attempted to connect Gatt Server");
1360             g_retrycount--;
1361             retry_flag = 1;
1362             OIC_LOG_V(DEBUG, TAG, "Retry count left %d time(s)", g_retrycount);
1363             CAResult_t result = CALEGattConnectionRetry(remoteAddress);
1364             if(result == CA_STATUS_FAILED)
1365             {
1366                 goto error_exit;
1367             }
1368             else
1369             {
1370                 oc_mutex_unlock(g_LEServerListMutex);
1371                 OIC_LOG(ERROR, TAG, "Previous connection attempt failed, attempting to retry again");
1372                 OIC_LOG_V(DEBUG, TAG, "Retry count left %d time(s)", g_retrycount);
1373                 return CA_STATUS_FAILED;
1374             }
1375         }
1376     }
1377
1378     retry_flag = 0;
1379     // Server will read data on this characteristic.
1380     bt_gatt_h writeChrHandle = NULL;
1381     ret = bt_gatt_service_get_characteristic(serviceHandle, CA_GATT_REQUEST_CHRC_UUID,
1382             &writeChrHandle);
1383     if (BT_ERROR_NONE != ret || NULL == writeChrHandle)
1384     {
1385         OIC_LOG_V(ERROR, TAG,
1386                   "bt_gatt_service_get_characteristic Failed with ret value [%s] ",
1387                   CALEGetErrorMsg(ret));
1388         goto error_exit;
1389     }
1390
1391     // Server will notify data on this characteristic.
1392     bt_gatt_h readChrHandle = NULL;
1393     ret = bt_gatt_service_get_characteristic(serviceHandle, CA_GATT_RESPONSE_CHRC_UUID,
1394             &readChrHandle);
1395     if (BT_ERROR_NONE != ret || NULL == readChrHandle)
1396     {
1397         OIC_LOG_V(ERROR, TAG,
1398                   "bt_gatt_service_get_characteristic Failed with ret value [%s] ",
1399                   CALEGetErrorMsg(ret));
1400         goto error_exit;
1401     }
1402
1403
1404     //TODO: This data has to be freed while unsetting the callback.
1405     char *addr = OICStrdup(remoteAddress);
1406     if (NULL == addr)
1407     {
1408         OIC_LOG(ERROR, TAG, "addr is NULL");
1409         goto error_exit;
1410     }
1411
1412     ret = bt_gatt_client_set_characteristic_value_changed_cb(readChrHandle,
1413             CALEGattCharacteristicChangedCb,
1414             (void *)addr);
1415     if (BT_ERROR_NONE != ret)
1416     {
1417         OIC_LOG_V(ERROR, TAG,
1418                   "bt_gatt_client_set_characteristic_value_changed_cb Failed with ret value [%s]",
1419                   CALEGetErrorMsg(ret));
1420         goto error_exit;
1421     }
1422
1423     ret = bt_gatt_client_set_att_mtu_changed_cb(serverInfo->clientHandle,
1424             CALEGattClientMTUChangedCb,
1425             (void *)serverInfo->remoteAddress);
1426     if (BT_ERROR_NONE != ret)
1427     {
1428         OIC_LOG_V(ERROR, TAG,
1429                   "bt_gatt_client_set_att_mtu_changed_cb Failed with ret value [%s]",
1430                   CALEGetErrorMsg(ret));
1431         goto error_exit;
1432     }
1433
1434     oc_mutex_lock(g_threadMTUChangedMutex);
1435     ret = bt_gatt_client_request_att_mtu_change(serverInfo->clientHandle, CA_SUPPORTED_BLE_MTU_SIZE - CA_BLE_MTU_HEADER_SIZE);
1436     if (BT_ERROR_NONE != ret)
1437     {
1438         OIC_LOG_V(ERROR, TAG,
1439                   "bt_gatt_client_request_att_mtu_change Failed with ret value [%s]",
1440                   CALEGetErrorMsg(ret));
1441         oc_mutex_unlock(g_threadMTUChangedMutex);
1442         goto error_exit;
1443     }
1444
1445     OIC_LOG(DEBUG, TAG, "wait for callback to notify MTU Changed Callback");
1446     oc_cond_wait(g_threadMTUChangedCond, g_threadMTUChangedMutex);
1447     oc_mutex_unlock(g_threadMTUChangedMutex);
1448
1449     OIC_LOG(DEBUG, TAG, "Done MTU");
1450     ret = bt_gatt_client_get_att_mtu(serverInfo->clientHandle, &mtu_size);
1451     if (BT_ERROR_NONE != ret)
1452     {
1453         OIC_LOG_V(ERROR, TAG,
1454                   "bt_gatt_client_get_att_mtu Failed with ret value [%s]",
1455                   CALEGetErrorMsg(ret));
1456         goto error_exit;
1457     }
1458     OIC_LOG_V(DEBUG, TAG,"Negotiated MTU Size %d",mtu_size);
1459
1460     serverInfo->serviceHandle = serviceHandle;
1461     serverInfo->readChar = readChrHandle;
1462     serverInfo->writeChar = writeChrHandle;
1463     serverInfo->status = LE_STATUS_SERVICES_DISCOVERED;
1464     serverInfo->mtu_size = mtu_size;
1465
1466     while (serverInfo->pendingDataList)
1467     {
1468         LEData *leData = serverInfo->pendingDataList->data;
1469         if (CA_STATUS_OK != CAUpdateCharacteristicsToGattServerImpl(
1470                 serverInfo, leData->data, leData->dataLength))
1471         {
1472             OIC_LOG_V(ERROR, TAG, "Failed to send pending data to [%s]",
1473                       serverInfo->remoteAddress);
1474
1475             CADestroyLEDataList(&serverInfo->pendingDataList);
1476             break;
1477         }
1478         CARemoveLEDataFromList(&serverInfo->pendingDataList);
1479     }
1480     oc_mutex_unlock(g_LEServerListMutex);
1481
1482     OIC_LOG(DEBUG, TAG, "OUT");
1483     return CA_STATUS_OK;
1484
1485 error_exit:
1486     bt_gatt_client_destroy(serverInfo->clientHandle);
1487     serverInfo->clientHandle = NULL;
1488     oc_mutex_unlock(g_LEServerListMutex);
1489     CALEGattDisConnect(remoteAddress);
1490     return CA_STATUS_FAILED;
1491 }
1492
1493 CAResult_t CAUpdateCharacteristicsToGattServer(const char *remoteAddress,
1494         const uint8_t *data, const uint32_t dataLen,
1495         CALETransferType_t type, const int32_t position)
1496 {
1497     OIC_LOG(DEBUG, TAG, "IN");
1498
1499     VERIFY_NON_NULL(data, TAG, "data is NULL");
1500
1501     if (0 == dataLen)
1502     {
1503         OIC_LOG(ERROR, TAG, "dataLen is less than or equal zero. Invalid input!");
1504         return CA_STATUS_INVALID_PARAM;
1505     }
1506
1507     LEServerInfo *serverInfo = NULL;
1508     oc_mutex_lock(g_LEServerListMutex);
1509     if (LE_UNICAST == type)
1510     {
1511         if (CA_STATUS_OK != CAGetLEServerInfo(g_LEServerList, remoteAddress, &serverInfo))
1512         {
1513             OIC_LOG_V(DEBUG, TAG,
1514                       "Device with address [%s] not yet found, initiating scan",
1515                       remoteAddress);
1516
1517             char *addr = OICStrdup(remoteAddress);
1518             if (NULL == addr)
1519             {
1520                 oc_mutex_unlock(g_LEServerListMutex);
1521                 OIC_LOG(ERROR, TAG, "Device address is NULL");
1522                 return CA_STATUS_FAILED;
1523             }
1524             serverInfo = (LEServerInfo *)OICCalloc(1, sizeof(LEServerInfo));
1525             if (NULL == serverInfo)
1526             {
1527                 oc_mutex_unlock(g_LEServerListMutex);
1528                 OIC_LOG(ERROR, TAG, "Calloc failed");
1529                 OICFree(addr);
1530                 return CA_STATUS_FAILED;
1531             }
1532             serverInfo->remoteAddress = addr;
1533             serverInfo->status = LE_STATUS_UNICAST_PENDING;
1534
1535             if (CA_STATUS_OK != CAAddLEServerInfoToList(&g_LEServerList, serverInfo))
1536             {
1537                 oc_mutex_unlock(g_LEServerListMutex);
1538                 OIC_LOG_V(ERROR, TAG, "Could not add [%s] to server list", remoteAddress);
1539                 CAFreeLEServerInfo(serverInfo);
1540                 return CA_STATUS_FAILED;
1541             }
1542
1543             if (CA_STATUS_OK != CAAddLEDataToList(&serverInfo->pendingDataList, data, dataLen))
1544             {
1545                 oc_mutex_unlock(g_LEServerListMutex);
1546                 OIC_LOG(ERROR, TAG, "Could not add data to pending list");
1547                 return CA_STATUS_FAILED;
1548             }
1549         }
1550
1551         if(serverInfo->status == LE_STATUS_UNICAST_PENDING)
1552         {
1553             oc_mutex_lock(g_scanMutex);
1554             if (!g_isMulticastInProgress && !g_isUnicastScanInProgress)
1555             {
1556                 CAResult_t result = CALEGattStartDeviceScanning();
1557                 if (CA_STATUS_OK != result)
1558                 {
1559                     oc_mutex_unlock(g_scanMutex);
1560                     OIC_LOG(ERROR, TAG, "CALEGattStartDeviceScanning failed");
1561                     return CA_STATUS_FAILED;
1562                 }
1563                 g_isUnicastScanInProgress = true;
1564                 // Start Timer
1565                 oc_cond_signal(g_startTimerCond);
1566             }
1567             else
1568             {
1569                 g_isUnicastScanInProgress = true;
1570                 // Reset Timer
1571                 oc_cond_signal(g_scanningTimeCond);
1572             }
1573             oc_mutex_unlock(g_scanMutex);
1574
1575         }
1576
1577         if (serverInfo->status == LE_STATUS_DISCOVERED)
1578         {
1579             if (CA_STATUS_OK != CAAddLEDataToList(&serverInfo->pendingDataList, data, dataLen))
1580             {
1581                 oc_mutex_unlock(g_LEServerListMutex);
1582                 OIC_LOG(ERROR, TAG, "Could not add data to pending list");
1583                 return CA_STATUS_FAILED;
1584             }
1585
1586             bt_gatt_client_h clientHandle = NULL;
1587             int32_t ret = bt_gatt_client_create(serverInfo->remoteAddress, &clientHandle);
1588             if (BT_ERROR_NONE != ret || NULL == clientHandle)
1589             {
1590                 OIC_LOG_V(ERROR, TAG,
1591                           "bt_gatt_client_create Failed with ret value [%s] ", CALEGetErrorMsg(ret));
1592                 CALEGattDisConnect(serverInfo->remoteAddress);
1593                 return CA_STATUS_FAILED;
1594             }
1595             serverInfo->clientHandle = clientHandle;
1596
1597             serverInfo->status = LE_STATUS_CONNECTION_INITIATED;
1598             if (CA_STATUS_OK != CALEGattInitiateConnection(serverInfo->remoteAddress))
1599             {
1600                 OIC_LOG_V(ERROR, TAG, "Could not initiate connection to [%s]", serverInfo->remoteAddress);
1601                 serverInfo->status = LE_STATUS_DISCOVERED;
1602                 CADestroyLEDataList(&serverInfo->pendingDataList);
1603                 oc_mutex_unlock(g_LEServerListMutex);
1604                 return CA_STATUS_FAILED;
1605             }
1606         }
1607         else if (serverInfo->status < LE_STATUS_SERVICES_DISCOVERED)
1608         {
1609             if (CA_STATUS_OK != CAAddLEDataToList(&serverInfo->pendingDataList, data, dataLen))
1610             {
1611                 oc_mutex_unlock(g_LEServerListMutex);
1612                 OIC_LOG(ERROR, TAG, "Could not add data to pending list");
1613                 return CA_STATUS_FAILED;
1614             }
1615         }
1616         else
1617         {
1618             if (CA_STATUS_OK != CAUpdateCharacteristicsToGattServerImpl(serverInfo, data, dataLen))
1619             {
1620                 OIC_LOG_V(ERROR, TAG, "Could not update characteristic to gatt server [%s]",
1621                           serverInfo->remoteAddress);
1622                 oc_mutex_unlock(g_LEServerListMutex);
1623                 return CA_STATUS_FAILED;
1624             }
1625         }
1626     }
1627     else if (LE_MULTICAST == type)
1628     {
1629         OIC_LOG(ERROR, TAG, "LE_MULTICAST type Not used");
1630     }
1631     oc_mutex_unlock(g_LEServerListMutex);
1632     OIC_LOG(DEBUG, TAG, "OUT");
1633     return CA_STATUS_OK;
1634 }
1635
1636 CAResult_t CAUpdateCharacteristicsToAllGattServers(const uint8_t *data, uint32_t dataLen)
1637 {
1638     OIC_LOG(DEBUG,  TAG, "IN");
1639
1640     VERIFY_NON_NULL(data, TAG, "data is NULL");
1641
1642     if (0 == dataLen)
1643     {
1644         OIC_LOG(ERROR, TAG, "dataLen is less than or equal zero. Invalid input !");
1645         return CA_STATUS_INVALID_PARAM;
1646     }
1647
1648     oc_mutex_lock(g_LEServerListMutex);
1649     LEServerInfoList *curNode = g_LEServerList;
1650     while (curNode)
1651     {
1652         LEServerInfo *serverInfo = curNode->serverInfo;
1653         if (serverInfo->status == LE_STATUS_SERVICES_DISCOVERED)
1654         {
1655             if (CA_STATUS_OK != CAUpdateCharacteristicsToGattServerImpl(serverInfo, data, dataLen))
1656             {
1657                 OIC_LOG_V(ERROR, TAG, "Failed to update characteristics to gatt server [%s]",
1658                           serverInfo->remoteAddress);
1659             }
1660         }
1661         else if (serverInfo->status != LE_STATUS_INVALID)
1662         {
1663             if (CA_STATUS_OK != CAAddLEDataToList(&serverInfo->pendingDataList, data, dataLen))
1664             {
1665                 OIC_LOG(ERROR, TAG, "Failed to add to pending list");
1666             }
1667         }
1668         curNode = curNode->next;
1669     }
1670     oc_mutex_unlock(g_LEServerListMutex);
1671
1672     // Add the data to pending list.
1673     LEData *multicastData = (LEData *)OICCalloc(1, sizeof(LEData));
1674     if (NULL == multicastData)
1675     {
1676         OIC_LOG(ERROR, TAG, "Calloc failed");
1677         goto exit;
1678     }
1679     multicastData->data = OICCalloc(1, dataLen);
1680     if (NULL == multicastData->data)
1681     {
1682         OIC_LOG(ERROR, TAG, "Calloc failed");
1683         goto exit;
1684     }
1685     memcpy(multicastData->data, data, dataLen);
1686     multicastData->dataLength = dataLen;
1687
1688     oc_mutex_lock(g_multicastDataListMutex);
1689     if (NULL == g_multicastDataList)
1690     {
1691         g_multicastDataList = u_arraylist_create();
1692     }
1693     u_arraylist_add(g_multicastDataList, (void *)multicastData);
1694     oc_mutex_unlock(g_multicastDataListMutex);
1695
1696     // Start the scanning, if not started, else reset timer
1697     oc_mutex_lock(g_scanMutex);
1698     if (!g_isMulticastInProgress && !g_isUnicastScanInProgress)
1699     {
1700         CAResult_t result = CALEGattStartDeviceScanning();
1701         if (CA_STATUS_OK != result)
1702         {
1703             oc_mutex_unlock(g_scanMutex);
1704             OIC_LOG(ERROR, TAG, "CALEGattStartDeviceScanning Failed");
1705             goto exit;
1706         }
1707         g_isMulticastInProgress = true;
1708         // Start the timer by signalling it
1709         oc_cond_signal(g_startTimerCond);
1710     }
1711     else
1712     {
1713         g_isMulticastInProgress = true;
1714         // Reset timer
1715         oc_cond_signal(g_scanningTimeCond);
1716     }
1717     oc_mutex_unlock(g_scanMutex);
1718
1719 exit:
1720     OIC_LOG(DEBUG, TAG, "OUT ");
1721     return CA_STATUS_OK;
1722 }
1723
1724 uint16_t CALEClientGetMtuSize(const char* remote_address)
1725 {
1726     LEServerInfo *serverInfo = NULL;
1727     oc_mutex_lock(g_LEServerListMutex);
1728     if (CA_STATUS_OK == CAGetLEServerInfo(g_LEServerList, remote_address, &serverInfo))
1729     {
1730         if (serverInfo->status == LE_STATUS_SERVICES_DISCOVERED){
1731             OIC_LOG_V(DEBUG, TAG, "Mtu Size [%d]", serverInfo->mtu_size);
1732             oc_mutex_unlock(g_LEServerListMutex);
1733             OIC_LOG_V(INFO, TAG, "Returning Mtu Size [%d]", serverInfo->mtu_size - CA_BLE_MTU_HEADER_SIZE);
1734             return serverInfo->mtu_size - CA_BLE_MTU_HEADER_SIZE;
1735         }
1736     }
1737     oc_mutex_unlock(g_LEServerListMutex);
1738     return CA_DEFAULT_BLE_MTU_SIZE;
1739
1740 }
1741
1742 bool CALEClientIsConnected(const char* address)
1743 {
1744     (void)address;
1745     //@Todo
1746     return true;
1747 }
1748
1749 CAResult_t CALEClientSetMtuSize(const char* address, uint16_t mtuSize)
1750 {
1751     (void)mtuSize;
1752
1753     VERIFY_NON_NULL(address, TAG, "address is null");
1754     //@Todo
1755     //it should be implemented after update Tizen 3.0
1756     return CA_NOT_SUPPORTED;
1757 }
1758
1759 CAResult_t CALEClientSendNegotiationMessage(const char* address)
1760 {
1761     OIC_LOG_V(DEBUG, TAG, "CALEClientSendNegotiationMessage(%s)", address);
1762     //@Todo
1763     //it will be implemented when tizen public 3.0 is released.
1764     return CA_NOT_SUPPORTED;
1765 }