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     int ret = bt_gatt_connect(remoteAddress, false);
1174
1175     if (BT_ERROR_NONE != ret)
1176     {
1177         OIC_LOG_V(ERROR, TAG, "bt_gatt_connect Failed with ret value [%s] ",
1178                   CALEGetErrorMsg(ret));
1179         oc_mutex_unlock(g_LEClientConnectMutex);
1180         return CA_STATUS_FAILED;
1181     }
1182
1183     oc_mutex_unlock(g_LEClientConnectMutex);
1184
1185     OIC_LOG(DEBUG, TAG, "OUT");
1186     return result;
1187 }
1188
1189 CAResult_t CALEGattDisConnect(const char *remoteAddress)
1190 {
1191     OIC_LOG(DEBUG, TAG, "IN");
1192
1193     VERIFY_NON_NULL_RET(remoteAddress, TAG,
1194                         "remote address is NULL", CA_STATUS_FAILED);
1195
1196     int ret = bt_gatt_disconnect(remoteAddress);
1197
1198     if (BT_ERROR_NONE != ret)
1199     {
1200         OIC_LOG_V(ERROR, TAG, "bt_gatt_disconnect Failed with ret value [%s] ",
1201                   CALEGetErrorMsg(ret));
1202         return CA_STATUS_FAILED;
1203     }
1204
1205     OIC_LOG(DEBUG, TAG, "OUT");
1206     return CA_STATUS_OK;
1207 }
1208
1209 CAResult_t CAUpdateCharacteristicsToGattServerImpl(LEServerInfo *serverInfo,
1210         const uint8_t *data, const uint32_t dataLen)
1211 {
1212     OIC_LOG(DEBUG, TAG, "IN");
1213
1214     VERIFY_NON_NULL(serverInfo, TAG, "Server Info is NULL");
1215
1216     CALEGattStopDeviceScanning();
1217
1218     OIC_LOG_V(DEBUG, TAG, "Updating the data of length [%d] to [%s] ", dataLen,
1219               serverInfo->remoteAddress);
1220
1221     int result = bt_gatt_set_value(serverInfo->writeChar, (char *)data, dataLen);
1222
1223     if (BT_ERROR_NONE != result)
1224     {
1225         OIC_LOG_V(ERROR, TAG,
1226                   "bt_gatt_set_value Failed with return val [%s]",
1227                   CALEGetErrorMsg(result));
1228         goto exit;
1229     }
1230
1231     result = bt_gatt_client_write_value(serverInfo->writeChar, CALEGattCharacteristicWriteCb,
1232                                         NULL);
1233     if (BT_ERROR_NONE != result)
1234     {
1235         OIC_LOG_V(ERROR, TAG,
1236                   "bt_gatt_client_write_value Failed with return val [%s]",
1237                   CALEGetErrorMsg(result));
1238         goto exit;
1239     }
1240
1241     // wait for callback for write Characteristic with success to sent data
1242     OIC_LOG_V(DEBUG, TAG, "callback flag is %d", g_isSignalSetFlag);
1243     oc_mutex_lock(g_threadWriteCharacteristicMutex);
1244     if (!g_isSignalSetFlag)
1245     {
1246         OIC_LOG(DEBUG, TAG, "wait for callback to notify writeCharacteristic is success");
1247         if (OC_WAIT_SUCCESS != oc_cond_wait_for(g_threadWriteCharacteristicCond,
1248                                                 g_threadWriteCharacteristicMutex,
1249                                                 WAIT_TIME_WRITE_CHARACTERISTIC))
1250         {
1251             g_isSignalSetFlag = false;
1252             oc_mutex_unlock(g_threadWriteCharacteristicMutex);
1253             OIC_LOG(ERROR, TAG, "there is no response. write has failed");
1254             goto exit;
1255         }
1256     }
1257     // reset flag set by writeCharacteristic Callback
1258     g_isSignalSetFlag = false;
1259     oc_mutex_unlock(g_threadWriteCharacteristicMutex);
1260
1261     oc_mutex_lock(g_scanMutex);
1262     if (g_isMulticastInProgress || g_isUnicastScanInProgress)
1263     {
1264         if (CA_STATUS_OK != CALEGattStartDeviceScanning())
1265         {
1266             OIC_LOG(ERROR, TAG, "Could not start device scanning");
1267         }
1268     }
1269     oc_mutex_unlock(g_scanMutex);
1270     OIC_LOG(DEBUG, TAG, "OUT");
1271     return CA_STATUS_OK;
1272
1273 exit:
1274     oc_mutex_lock(g_scanMutex);
1275     if (g_isMulticastInProgress || g_isUnicastScanInProgress)
1276     {
1277         if (CA_STATUS_OK != CALEGattStartDeviceScanning())
1278         {
1279             OIC_LOG(ERROR, TAG, "Could not start device scanning");
1280         }
1281     }
1282     oc_mutex_unlock(g_scanMutex);
1283
1284     OIC_LOG(DEBUG, TAG, "OUT");
1285     return CA_STATUS_FAILED;
1286 }
1287
1288 void CADiscoverLEServicesThread(void *remoteAddress)
1289 {
1290     OIC_LOG(DEBUG, TAG, "IN");
1291
1292     VERIFY_NON_NULL_VOID(remoteAddress, TAG, "remote address is NULL");
1293
1294     char *address  = (char *)remoteAddress;
1295
1296     CAResult_t result = CALEGattDiscoverServices(address);
1297     if (CA_STATUS_OK != result)
1298     {
1299         OIC_LOG(ERROR, TAG, "CALEGattDiscoverServices failed");
1300     }
1301
1302     OICFree(address);
1303     OIC_LOG(DEBUG, TAG, "OUT");
1304 }
1305
1306 static int CALEWaittillDisconnect(oc_mutex mutex, oc_cond cv, int wait_seconds)
1307 {
1308     OIC_LOG(DEBUG, TAG, "Waiting for server to be disconnected...");
1309     oc_mutex_lock(mutex);
1310     uint64_t wait_time = wait_seconds * MICROSECS_PER_SEC;
1311     int ret = oc_cond_wait_for(cv, mutex, wait_time);
1312     oc_mutex_unlock(mutex);
1313     return ret;
1314 }
1315
1316 static CAResult_t CALEGattConnectionRetry(const char *remoteAddress)
1317 {
1318     OIC_LOG(DEBUG, TAG, "IN");
1319
1320     VERIFY_NON_NULL_RET(remoteAddress, TAG,
1321                         "remote address is NULL", CA_STATUS_FAILED);
1322
1323     CALEGattDisConnect(remoteAddress);
1324     CALEWaittillDisconnect(g_isDisconnectedMutex, g_LEDisconnectedCond, 10);
1325     CAResult_t result = CALEGattConnect(remoteAddress);
1326     OIC_LOG(DEBUG, TAG, "OUT");
1327     return result;
1328 }
1329
1330 CAResult_t CALEGattDiscoverServices(const char *remoteAddress)
1331 {
1332     OIC_LOG(DEBUG, TAG, "IN");
1333
1334     VERIFY_NON_NULL_RET(remoteAddress, TAG,
1335                         "remote address is NULL", CA_STATUS_FAILED);
1336
1337     LEServerInfo *serverInfo = NULL;
1338     unsigned int mtu_size;
1339     oc_mutex_lock(g_LEServerListMutex);
1340     if (CA_STATUS_OK != CAGetLEServerInfo(g_LEServerList, remoteAddress, &serverInfo))
1341     {
1342         oc_mutex_unlock(g_LEServerListMutex);
1343         OIC_LOG_V(ERROR, TAG, "Could not get server info for [%s]", remoteAddress);
1344         CALEGattDisConnect(remoteAddress);
1345         return CA_STATUS_FAILED;
1346     }
1347
1348     bt_gatt_h serviceHandle = NULL;
1349     int32_t ret = bt_gatt_client_get_service(serverInfo->clientHandle, CA_GATT_SERVICE_UUID, &serviceHandle);
1350     if (BT_ERROR_NONE != ret || NULL == serviceHandle)
1351     {
1352         OIC_LOG_V(ERROR, TAG,
1353                   "bt_gatt_client_get_service Failed with ret value [%s] ", CALEGetErrorMsg(ret));
1354
1355         if(g_retrycount)
1356         {
1357             OIC_LOG(DEBUG, TAG, "Retry will be attempted to connect Gatt Server");
1358             g_retrycount--;
1359             retry_flag = 1;
1360             OIC_LOG_V(DEBUG, TAG, "Retry count left %d time(s)", g_retrycount);
1361             CAResult_t result = CALEGattConnectionRetry(remoteAddress);
1362             if(result == CA_STATUS_FAILED)
1363             {
1364                 goto error_exit;
1365             }
1366             else
1367             {
1368                 oc_mutex_unlock(g_LEServerListMutex);
1369                 OIC_LOG(ERROR, TAG, "Previous connection attempt failed, attempting to retry again");
1370                 OIC_LOG_V(DEBUG, TAG, "Retry count left %d time(s)", g_retrycount);
1371                 return CA_STATUS_FAILED;
1372             }
1373         }
1374     }
1375
1376     retry_flag = 0;
1377     // Server will read data on this characteristic.
1378     bt_gatt_h writeChrHandle = NULL;
1379     ret = bt_gatt_service_get_characteristic(serviceHandle, CA_GATT_REQUEST_CHRC_UUID,
1380             &writeChrHandle);
1381     if (BT_ERROR_NONE != ret || NULL == writeChrHandle)
1382     {
1383         OIC_LOG_V(ERROR, TAG,
1384                   "bt_gatt_service_get_characteristic Failed with ret value [%s] ",
1385                   CALEGetErrorMsg(ret));
1386         goto error_exit;
1387     }
1388
1389     // Server will notify data on this characteristic.
1390     bt_gatt_h readChrHandle = NULL;
1391     ret = bt_gatt_service_get_characteristic(serviceHandle, CA_GATT_RESPONSE_CHRC_UUID,
1392             &readChrHandle);
1393     if (BT_ERROR_NONE != ret || NULL == readChrHandle)
1394     {
1395         OIC_LOG_V(ERROR, TAG,
1396                   "bt_gatt_service_get_characteristic Failed with ret value [%s] ",
1397                   CALEGetErrorMsg(ret));
1398         goto error_exit;
1399     }
1400
1401
1402     //TODO: This data has to be freed while unsetting the callback.
1403     char *addr = OICStrdup(remoteAddress);
1404     if (NULL == addr)
1405     {
1406         OIC_LOG(ERROR, TAG, "addr is NULL");
1407         goto error_exit;
1408     }
1409
1410     ret = bt_gatt_client_set_characteristic_value_changed_cb(readChrHandle,
1411             CALEGattCharacteristicChangedCb,
1412             (void *)addr);
1413     if (BT_ERROR_NONE != ret)
1414     {
1415         OIC_LOG_V(ERROR, TAG,
1416                   "bt_gatt_client_set_characteristic_value_changed_cb Failed with ret value [%s]",
1417                   CALEGetErrorMsg(ret));
1418         goto error_exit;
1419     }
1420
1421     ret = bt_gatt_client_set_att_mtu_changed_cb(serverInfo->clientHandle,
1422             CALEGattClientMTUChangedCb,
1423             (void *)serverInfo->remoteAddress);
1424     if (BT_ERROR_NONE != ret)
1425     {
1426         OIC_LOG_V(ERROR, TAG,
1427                   "bt_gatt_client_set_att_mtu_changed_cb Failed with ret value [%s]",
1428                   CALEGetErrorMsg(ret));
1429         goto error_exit;
1430     }
1431
1432     oc_mutex_lock(g_threadMTUChangedMutex);
1433     ret = bt_gatt_client_request_att_mtu_change(serverInfo->clientHandle, CA_SUPPORTED_BLE_MTU_SIZE - CA_BLE_MTU_HEADER_SIZE);
1434     if (BT_ERROR_NONE != ret)
1435     {
1436         OIC_LOG_V(ERROR, TAG,
1437                   "bt_gatt_client_request_att_mtu_change Failed with ret value [%s]",
1438                   CALEGetErrorMsg(ret));
1439         oc_mutex_unlock(g_threadMTUChangedMutex);
1440         goto error_exit;
1441     }
1442
1443     OIC_LOG(DEBUG, TAG, "wait for callback to notify MTU Changed Callback");
1444     oc_cond_wait(g_threadMTUChangedCond, g_threadMTUChangedMutex);
1445     oc_mutex_unlock(g_threadMTUChangedMutex);
1446
1447     OIC_LOG(DEBUG, TAG, "Done MTU");
1448     ret = bt_gatt_client_get_att_mtu(serverInfo->clientHandle, &mtu_size);
1449     if (BT_ERROR_NONE != ret)
1450     {
1451         OIC_LOG_V(ERROR, TAG,
1452                   "bt_gatt_client_get_att_mtu Failed with ret value [%s]",
1453                   CALEGetErrorMsg(ret));
1454         goto error_exit;
1455     }
1456     OIC_LOG_V(DEBUG, TAG,"Negotiated MTU Size %d",mtu_size);
1457
1458     serverInfo->serviceHandle = serviceHandle;
1459     serverInfo->readChar = readChrHandle;
1460     serverInfo->writeChar = writeChrHandle;
1461     serverInfo->status = LE_STATUS_SERVICES_DISCOVERED;
1462     serverInfo->mtu_size = mtu_size;
1463
1464     while (serverInfo->pendingDataList)
1465     {
1466         LEData *leData = serverInfo->pendingDataList->data;
1467         if (CA_STATUS_OK != CAUpdateCharacteristicsToGattServerImpl(
1468                 serverInfo, leData->data, leData->dataLength))
1469         {
1470             OIC_LOG_V(ERROR, TAG, "Failed to send pending data to [%s]",
1471                       serverInfo->remoteAddress);
1472
1473             CADestroyLEDataList(&serverInfo->pendingDataList);
1474             break;
1475         }
1476         CARemoveLEDataFromList(&serverInfo->pendingDataList);
1477     }
1478     oc_mutex_unlock(g_LEServerListMutex);
1479
1480     OIC_LOG(DEBUG, TAG, "OUT");
1481     return CA_STATUS_OK;
1482
1483 error_exit:
1484     bt_gatt_client_destroy(serverInfo->clientHandle);
1485     serverInfo->clientHandle = NULL;
1486     oc_mutex_unlock(g_LEServerListMutex);
1487     CALEGattDisConnect(remoteAddress);
1488     return CA_STATUS_FAILED;
1489 }
1490
1491 CAResult_t CAUpdateCharacteristicsToGattServer(const char *remoteAddress,
1492         const uint8_t *data, const uint32_t dataLen,
1493         CALETransferType_t type, const int32_t position)
1494 {
1495     OIC_LOG(DEBUG, TAG, "IN");
1496
1497     VERIFY_NON_NULL(data, TAG, "data is NULL");
1498
1499     if (0 == dataLen)
1500     {
1501         OIC_LOG(ERROR, TAG, "dataLen is less than or equal zero. Invalid input!");
1502         return CA_STATUS_INVALID_PARAM;
1503     }
1504
1505     LEServerInfo *serverInfo = NULL;
1506     bool isConnected = false;
1507     oc_mutex_lock(g_LEServerListMutex);
1508     if (LE_UNICAST == type)
1509     {
1510         if (CA_STATUS_OK != CAGetLEServerInfo(g_LEServerList, remoteAddress, &serverInfo))
1511         {
1512             OIC_LOG_V(DEBUG, TAG,
1513                       "Device with address [%s] not yet found, initiating scan",
1514                       remoteAddress);
1515
1516             char *addr = OICStrdup(remoteAddress);
1517             if (NULL == addr)
1518             {
1519                 oc_mutex_unlock(g_LEServerListMutex);
1520                 OIC_LOG(ERROR, TAG, "Device address is NULL");
1521                 return CA_STATUS_FAILED;
1522             }
1523             serverInfo = (LEServerInfo *)OICCalloc(1, sizeof(LEServerInfo));
1524             if (NULL == serverInfo)
1525             {
1526                 oc_mutex_unlock(g_LEServerListMutex);
1527                 OIC_LOG(ERROR, TAG, "Calloc failed");
1528                 OICFree(addr);
1529                 return CA_STATUS_FAILED;
1530             }
1531             serverInfo->remoteAddress = addr;
1532             serverInfo->status = LE_STATUS_UNICAST_PENDING;
1533
1534             if (CA_STATUS_OK != CAAddLEServerInfoToList(&g_LEServerList, serverInfo))
1535             {
1536                 oc_mutex_unlock(g_LEServerListMutex);
1537                 OIC_LOG_V(ERROR, TAG, "Could not add [%s] to server list", remoteAddress);
1538                 CAFreeLEServerInfo(serverInfo);
1539                 return CA_STATUS_FAILED;
1540             }
1541
1542             if (CA_STATUS_OK != CAAddLEDataToList(&serverInfo->pendingDataList, data, dataLen))
1543             {
1544                 oc_mutex_unlock(g_LEServerListMutex);
1545                 OIC_LOG(ERROR, TAG, "Could not add data to pending list");
1546                 return CA_STATUS_FAILED;
1547             }
1548         }
1549
1550         if(serverInfo->status == LE_STATUS_UNICAST_PENDING)
1551         {
1552
1553             int ret = bt_device_is_profile_connected(remoteAddress, BT_PROFILE_GATT, &isConnected);
1554             if (BT_ERROR_NONE != ret)
1555             {
1556                 OIC_LOG_V(ERROR, TAG, "bt_device_is_profile_connected Failed with ret value [%s] ",
1557                           CALEGetErrorMsg(ret));
1558                 oc_mutex_unlock(g_LEServerListMutex);
1559                 return CA_STATUS_FAILED;
1560             }
1561
1562             if (isConnected){
1563                 OIC_LOG_V(DEBUG, TAG, "Already connected to address [%s]", remoteAddress);
1564                 serverInfo->status = LE_STATUS_CONNECTED;
1565             } else {
1566                 oc_mutex_lock(g_scanMutex);
1567                 if (!g_isMulticastInProgress && !g_isUnicastScanInProgress)
1568                 {
1569                     CAResult_t result = CALEGattStartDeviceScanning();
1570                     if (CA_STATUS_OK != result)
1571                     {
1572                         oc_mutex_unlock(g_scanMutex);
1573                         OIC_LOG(ERROR, TAG, "CALEGattStartDeviceScanning failed");
1574                         oc_mutex_unlock(g_LEServerListMutex);
1575                         return CA_STATUS_FAILED;
1576                     }
1577                     g_isUnicastScanInProgress = true;
1578                     // Start Timer
1579                     oc_cond_signal(g_startTimerCond);
1580                 }
1581                 else
1582                 {
1583                     g_isUnicastScanInProgress = true;
1584                     // Reset Timer
1585                     oc_cond_signal(g_scanningTimeCond);
1586                 }
1587                 oc_mutex_unlock(g_scanMutex);
1588               }
1589
1590         }
1591
1592         if (serverInfo->status == LE_STATUS_CONNECTED)
1593         {
1594             oc_mutex_lock(g_LEClientThreadPoolMutex);
1595             if (NULL == g_LEClientThreadPool)
1596             {
1597                 oc_mutex_unlock(g_LEClientThreadPoolMutex);
1598                 OIC_LOG(ERROR, TAG, "g_LEClientThreadPool is NULL");
1599                 oc_mutex_unlock(g_LEServerListMutex);
1600                 return CA_STATUS_FAILED;
1601             }
1602             char *addr = OICStrdup(remoteAddress);
1603             if (NULL == addr)
1604             {
1605                 oc_mutex_unlock(g_LEClientThreadPoolMutex);
1606                 OIC_LOG(ERROR, TAG, "addr is NULL");
1607                 oc_mutex_unlock(g_LEServerListMutex);
1608                 return CA_STATUS_FAILED;
1609             }
1610             CAResult_t ret = ca_thread_pool_add_task(g_LEClientThreadPool, CADiscoverLEServicesThread,
1611                                                      addr, NULL);
1612             oc_mutex_unlock(g_LEClientThreadPoolMutex);
1613             if (CA_STATUS_OK != ret)
1614             {
1615                 OIC_LOG_V(ERROR, TAG, "ca_thread_pool_add_task failed with ret [%d]", ret);
1616                 OICFree(addr);
1617             }
1618         }
1619
1620         if (serverInfo->status == LE_STATUS_DISCOVERED)
1621         {
1622             if (CA_STATUS_OK != CAAddLEDataToList(&serverInfo->pendingDataList, data, dataLen))
1623             {
1624                 oc_mutex_unlock(g_LEServerListMutex);
1625                 OIC_LOG(ERROR, TAG, "Could not add data to pending list");
1626                 return CA_STATUS_FAILED;
1627             }
1628
1629             bt_gatt_client_h clientHandle = NULL;
1630             int32_t ret = bt_gatt_client_create(serverInfo->remoteAddress, &clientHandle);
1631             if (BT_ERROR_NONE != ret || NULL == clientHandle)
1632             {
1633                 OIC_LOG_V(ERROR, TAG,
1634                           "bt_gatt_client_create Failed with ret value [%s] ", CALEGetErrorMsg(ret));
1635                 CALEGattDisConnect(serverInfo->remoteAddress);
1636                 oc_mutex_unlock(g_LEServerListMutex);
1637                 return CA_STATUS_FAILED;
1638             }
1639             serverInfo->clientHandle = clientHandle;
1640
1641             serverInfo->status = LE_STATUS_CONNECTION_INITIATED;
1642             if (CA_STATUS_OK != CALEGattInitiateConnection(serverInfo->remoteAddress))
1643             {
1644                 OIC_LOG_V(ERROR, TAG, "Could not initiate connection to [%s]", serverInfo->remoteAddress);
1645                 serverInfo->status = LE_STATUS_DISCOVERED;
1646                 CADestroyLEDataList(&serverInfo->pendingDataList);
1647                 oc_mutex_unlock(g_LEServerListMutex);
1648                 return CA_STATUS_FAILED;
1649             }
1650         }
1651         else if (serverInfo->status < LE_STATUS_SERVICES_DISCOVERED)
1652         {
1653             if (CA_STATUS_OK != CAAddLEDataToList(&serverInfo->pendingDataList, data, dataLen))
1654             {
1655                 oc_mutex_unlock(g_LEServerListMutex);
1656                 OIC_LOG(ERROR, TAG, "Could not add data to pending list");
1657                 return CA_STATUS_FAILED;
1658             }
1659         }
1660         else
1661         {
1662             if (CA_STATUS_OK != CAUpdateCharacteristicsToGattServerImpl(serverInfo, data, dataLen))
1663             {
1664                 OIC_LOG_V(ERROR, TAG, "Could not update characteristic to gatt server [%s]",
1665                           serverInfo->remoteAddress);
1666                 oc_mutex_unlock(g_LEServerListMutex);
1667                 return CA_STATUS_FAILED;
1668             }
1669         }
1670     }
1671     else if (LE_MULTICAST == type)
1672     {
1673         OIC_LOG(ERROR, TAG, "LE_MULTICAST type Not used");
1674     }
1675     oc_mutex_unlock(g_LEServerListMutex);
1676     OIC_LOG(DEBUG, TAG, "OUT");
1677     return CA_STATUS_OK;
1678 }
1679
1680 CAResult_t CAUpdateCharacteristicsToAllGattServers(const uint8_t *data, uint32_t dataLen)
1681 {
1682     OIC_LOG(DEBUG,  TAG, "IN");
1683
1684     VERIFY_NON_NULL(data, TAG, "data is NULL");
1685
1686     if (0 == dataLen)
1687     {
1688         OIC_LOG(ERROR, TAG, "dataLen is less than or equal zero. Invalid input !");
1689         return CA_STATUS_INVALID_PARAM;
1690     }
1691
1692     oc_mutex_lock(g_LEServerListMutex);
1693     LEServerInfoList *curNode = g_LEServerList;
1694     while (curNode)
1695     {
1696         LEServerInfo *serverInfo = curNode->serverInfo;
1697         if (serverInfo->status == LE_STATUS_SERVICES_DISCOVERED)
1698         {
1699             if (CA_STATUS_OK != CAUpdateCharacteristicsToGattServerImpl(serverInfo, data, dataLen))
1700             {
1701                 OIC_LOG_V(ERROR, TAG, "Failed to update characteristics to gatt server [%s]",
1702                           serverInfo->remoteAddress);
1703             }
1704         }
1705         else if (serverInfo->status != LE_STATUS_INVALID)
1706         {
1707             if (CA_STATUS_OK != CAAddLEDataToList(&serverInfo->pendingDataList, data, dataLen))
1708             {
1709                 OIC_LOG(ERROR, TAG, "Failed to add to pending list");
1710             }
1711         }
1712         curNode = curNode->next;
1713     }
1714     oc_mutex_unlock(g_LEServerListMutex);
1715
1716     // Add the data to pending list.
1717     LEData *multicastData = (LEData *)OICCalloc(1, sizeof(LEData));
1718     if (NULL == multicastData)
1719     {
1720         OIC_LOG(ERROR, TAG, "Calloc failed");
1721         goto exit;
1722     }
1723     multicastData->data = OICCalloc(1, dataLen);
1724     if (NULL == multicastData->data)
1725     {
1726         OIC_LOG(ERROR, TAG, "Calloc failed");
1727         goto exit;
1728     }
1729     memcpy(multicastData->data, data, dataLen);
1730     multicastData->dataLength = dataLen;
1731
1732     oc_mutex_lock(g_multicastDataListMutex);
1733     if (NULL == g_multicastDataList)
1734     {
1735         g_multicastDataList = u_arraylist_create();
1736     }
1737     u_arraylist_add(g_multicastDataList, (void *)multicastData);
1738     oc_mutex_unlock(g_multicastDataListMutex);
1739
1740     // Start the scanning, if not started, else reset timer
1741     oc_mutex_lock(g_scanMutex);
1742     if (!g_isMulticastInProgress && !g_isUnicastScanInProgress)
1743     {
1744         CAResult_t result = CALEGattStartDeviceScanning();
1745         if (CA_STATUS_OK != result)
1746         {
1747             oc_mutex_unlock(g_scanMutex);
1748             OIC_LOG(ERROR, TAG, "CALEGattStartDeviceScanning Failed");
1749             goto exit;
1750         }
1751         g_isMulticastInProgress = true;
1752         // Start the timer by signalling it
1753         oc_cond_signal(g_startTimerCond);
1754     }
1755     else
1756     {
1757         g_isMulticastInProgress = true;
1758         // Reset timer
1759         oc_cond_signal(g_scanningTimeCond);
1760     }
1761     oc_mutex_unlock(g_scanMutex);
1762
1763 exit:
1764     OIC_LOG(DEBUG, TAG, "OUT ");
1765     return CA_STATUS_OK;
1766 }
1767
1768 uint16_t CALEClientGetMtuSize(const char* remote_address)
1769 {
1770     LEServerInfo *serverInfo = NULL;
1771     oc_mutex_lock(g_LEServerListMutex);
1772     if (CA_STATUS_OK == CAGetLEServerInfo(g_LEServerList, remote_address, &serverInfo))
1773     {
1774         if (serverInfo->status == LE_STATUS_SERVICES_DISCOVERED){
1775             OIC_LOG_V(DEBUG, TAG, "Mtu Size [%d]", serverInfo->mtu_size);
1776             oc_mutex_unlock(g_LEServerListMutex);
1777             OIC_LOG_V(INFO, TAG, "Returning Mtu Size [%d]", serverInfo->mtu_size - CA_BLE_MTU_HEADER_SIZE);
1778             return serverInfo->mtu_size - CA_BLE_MTU_HEADER_SIZE;
1779         }
1780     }
1781     oc_mutex_unlock(g_LEServerListMutex);
1782     return CA_DEFAULT_BLE_MTU_SIZE;
1783
1784 }
1785
1786 bool CALEClientIsConnected(const char* address)
1787 {
1788     (void)address;
1789     //@Todo
1790     return true;
1791 }
1792
1793 CAResult_t CALEClientSetMtuSize(const char* address, uint16_t mtuSize)
1794 {
1795     (void)mtuSize;
1796
1797     VERIFY_NON_NULL(address, TAG, "address is null");
1798     //@Todo
1799     //it should be implemented after update Tizen 3.0
1800     return CA_NOT_SUPPORTED;
1801 }
1802
1803 CAResult_t CALEClientSendNegotiationMessage(const char* address)
1804 {
1805     OIC_LOG_V(DEBUG, TAG, "CALEClientSendNegotiationMessage(%s)", address);
1806     //@Todo
1807     //it will be implemented when tizen public 3.0 is released.
1808     return CA_NOT_SUPPORTED;
1809 }