resource/csdk/security/src/directpairing.c

   1 /* *****************************************************************\r
   2  *\r
   3  * Copyright 2016 Samsung Electronics All Rights Reserved.\r
   4  *\r
   5  *\r
   6  *\r
   7  * Licensed under the Apache License, Version 2.0 (the "License");\r
   8  * you may not use this file except in compliance with the License.\r
   9  * You may obtain a copy of the License at\r
  10  *\r
  11  *     http://www.apache.org/licenses/LICENSE-2.0\r
  12  *\r
  13  * Unless required by applicable law or agreed to in writing, software\r
  14  * distributed under the License is distributed on an "AS IS" BASIS,\r
  15  * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.\r
  16  * See the License for the specific language governing permissions and\r
  17  * limitations under the License.\r
  18  *\r
  19  * *****************************************************************/\r
  20 #ifndef _POSIX_C_SOURCE\r
  21 #define _POSIX_C_SOURCE 200112L\r
  22 #endif\r
  23 #ifdef HAVE_UNISTD_H\r
  24 #include <unistd.h>\r
  25 #endif\r
  26 #ifdef HAVE_TIME_H\r
  27 #include <time.h>\r
  28 #endif\r
  29 #ifdef HAVE_SYS_TIME_H\r
  30 #include <sys/time.h>\r
  31 #endif\r
  32 #ifdef HAVE_STRING_H\r
  33 #include <string.h>\r
  34 #endif\r
  35 \r
  36 #include "ocstack.h"\r
  37 #include "oic_malloc.h"\r
  38 #include "oic_string.h"\r
  39 #include "logger.h"\r
  40 #include "cJSON.h"\r
  41 #include "utlist.h"\r
  42 #include "ocpayload.h"\r
  43 #include "payload_logging.h"\r
  44 #include "cainterface.h"\r
  45 \r
  46 #include "directpairing.h"\r
  47 #include "srmresourcestrings.h" //@note: SRM's internal header\r
  48 #include "doxmresource.h"       //@note: SRM's internal header\r
  49 #include "pconfresource.h"       //@note: SRM's internal header\r
  50 #include "dpairingresource.h"       //@note: SRM's internal header\r
  51 #include "credresource.h"\r
  52 \r
  53 #include "pmtypes.h"\r
  54 #include "pmutility.h"\r
  55 \r
  56 #include "srmutility.h"\r
  57 \r
  58 #ifdef __WITH_DTLS__\r
  59 #include "global.h"\r
  60 #endif\r
  61 \r
  62 \r
  63 #define TAG ("DP")\r
  64 static const uint16_t CBOR_SIZE = 1024;\r
  65 \r
  66 /**\r
  67  * Structure to carry direct-pairing API data to callback.\r
  68  */\r
  69 typedef struct DPairData\r
  70 {\r
  71     OCDirectPairingDev_t        *peer;                         /**< Pointer to pairing target info.**/\r
  72     char                                  pin[DP_PIN_LENGTH];  /**< PIN **/\r
  73     OCDirectPairingResultCB    resultCallback;           /**< Pointer to result callback.**/\r
  74     void *userCtx;                                      /** < user context to pass in callback **/\r
  75 } DPairData_t;\r
  76 \r
  77 static OCDirectPairingDev_t *g_dp_paired = NULL;\r
  78 static OCDirectPairingDev_t *g_dp_discover = NULL;\r
  79 static DPairData_t *g_dp_proceed_ctx = NULL;\r
  80 \r
  81 \r
  82 /**\r
  83  * Function to search node in linked list that matches given IP and port.\r
  84  *\r
  85  * @param[in] pList         List of OCProvisionDev_t.\r
  86  * @param[in] addr          address of target device.\r
  87  * @param[in] port          port of remote server.\r
  88  *\r
  89  * @return pointer of OCProvisionDev_t if exist, otherwise NULL\r
  90  */\r
  91 OCDirectPairingDev_t* getDev(OCDirectPairingDev_t **ppList, const char* addr, const uint16_t port)\r
  92 {\r
  93     if(NULL == addr)\r
  94     {\r
  95         OIC_LOG_V(ERROR, TAG, "Invalid Input parameters in [%s]\n", __FUNCTION__);\r
  96         return NULL;\r
  97     }\r
  98 \r
  99     OCDirectPairingDev_t *ptr = NULL;\r
 100     LL_FOREACH(*ppList, ptr)\r
 101     {\r
 102         if( strcmp(ptr->endpoint.addr, addr) == 0 && port == ptr->endpoint.port)\r
 103         {\r
 104             return ptr;\r
 105         }\r
 106     }\r
 107 \r
 108     return NULL;\r
 109 }\r
 110 \r
 111 \r
 112 \r
 113 /**\r
 114  * Add device information to list.\r
 115  *\r
 116  * @param[in] pList         List of OCProvisionDev_t.\r
 117  * @param[in] addr          address of target device.\r
 118  * @param[in] port          port of remote server.\r
 119  * @param[in] adapter       adapter type of endpoint.\r
 120  * @param[in] doxm          pointer to doxm instance.\r
 121  * @param[in] connType  connectivity type of endpoint\r
 122  *\r
 123  * @return OC_STACK_OK for success and errorcode otherwise.\r
 124  */\r
 125 OCStackResult addDev(OCDirectPairingDev_t **ppList, OCDevAddr *endpoint,\r
 126                                       OCConnectivityType conn, OicSecPconf_t *pconf)\r
 127 {\r
 128     if(NULL == endpoint || NULL == pconf)\r
 129     {\r
 130         OIC_LOG_V(ERROR, TAG, "Invalid Input parameters in [%s]\n", __FUNCTION__);\r
 131         return OC_STACK_INVALID_PARAM;\r
 132     }\r
 133 \r
 134     OCDirectPairingDev_t *ptr = getDev(ppList, endpoint->addr, endpoint->port);\r
 135     if(!ptr)\r
 136     {\r
 137         ptr = (OCDirectPairingDev_t *)OICCalloc(1, sizeof (OCDirectPairingDev_t));\r
 138         if (NULL == ptr)\r
 139         {\r
 140             OIC_LOG(ERROR, TAG, "Error while allocating memory for linkedlist node !!");\r
 141             return OC_STACK_NO_MEMORY;\r
 142         }\r
 143 \r
 144         memcpy(&ptr->endpoint, endpoint, sizeof(OCDevAddr));\r
 145         ptr->connType = conn;\r
 146         ptr->securePort = DEFAULT_SECURE_PORT;\r
 147         ptr->edp = pconf->edp;\r
 148         ptr->prm = pconf->prm;\r
 149         pconf->prm = NULL;  // to prevent free\r
 150         ptr->prmLen = pconf->prmLen;\r
 151         memcpy(&ptr->deviceID, &pconf->deviceID, sizeof(OicUuid_t));\r
 152         memcpy(&ptr->rowner, &pconf->rownerID, sizeof(OicUuid_t));\r
 153         ptr->next = NULL;\r
 154 \r
 155         LL_PREPEND(*ppList, ptr);\r
 156         OIC_LOG(INFO, TAG, "device added !");\r
 157     }\r
 158 \r
 159     return OC_STACK_OK;\r
 160 }\r
 161 \r
 162 \r
 163 /**\r
 164  * Add device information to list.\r
 165  *\r
 166  * @param[in] ppList         List of OCProvisionDev_t.\r
 167  * @param[in] pDev          target device.\r
 168  *\r
 169  * @return OC_STACK_OK for success and errorcode otherwise.\r
 170  */\r
 171 OCStackResult addDev2(OCDirectPairingDev_t **ppList, OCDirectPairingDev_t *pDev)\r
 172 {\r
 173     if(NULL == pDev)\r
 174     {\r
 175         OIC_LOG_V(ERROR, TAG, "Invalid Input parameters in [%s]\n", __FUNCTION__);\r
 176         return OC_STACK_INVALID_PARAM;\r
 177     }\r
 178 \r
 179     OCDirectPairingDev_t *ptr = getDev(ppList, pDev->endpoint.addr, pDev->endpoint.port);\r
 180     if(!ptr)\r
 181     {\r
 182         ptr = (OCDirectPairingDev_t *)OICCalloc(1, sizeof (OCDirectPairingDev_t));\r
 183         if (NULL == ptr)\r
 184         {\r
 185             OIC_LOG(ERROR, TAG, "Error while allocating memory for linkedlist node !!");\r
 186             return OC_STACK_NO_MEMORY;\r
 187         }\r
 188 \r
 189         memcpy(&ptr->endpoint, &pDev->endpoint, sizeof(OCDevAddr));\r
 190         ptr->connType = pDev->connType;\r
 191         ptr->securePort = pDev->securePort;\r
 192         ptr->edp = pDev->edp;\r
 193         ptr->prmLen = pDev->prmLen;\r
 194         ptr->prm = (OicSecPrm_t*)OICCalloc(ptr->prmLen, sizeof (OicSecPrm_t));\r
 195         if (NULL == ptr->prm)\r
 196         {\r
 197             OIC_LOG(ERROR, TAG, "Error while allocating memory for prm !!");\r
 198             return OC_STACK_NO_MEMORY;\r
 199         }\r
 200         memcpy(ptr->prm, pDev->prm, sizeof(OicSecPrm_t)*ptr->prmLen);\r
 201         memcpy(&ptr->deviceID, &pDev->deviceID, sizeof(OicUuid_t));\r
 202         memcpy(&ptr->rowner, &pDev->rowner, sizeof(OicUuid_t));\r
 203         ptr->next = NULL;\r
 204 \r
 205         LL_PREPEND(*ppList, ptr);\r
 206         OIC_LOG(INFO, TAG, "device added !");\r
 207     }\r
 208 \r
 209     return OC_STACK_OK;\r
 210 }\r
 211 \r
 212 \r
 213 \r
 214 /**\r
 215  * This function deletes list of provision target devices\r
 216  *\r
 217  * @param[in] pDevicesList         List of OCProvisionDev_t.\r
 218  */\r
 219 void delList(OCDirectPairingDev_t *pList)\r
 220 {\r
 221     if(pList)\r
 222     {\r
 223         OCDirectPairingDev_t *del = NULL, *tmp = NULL;\r
 224         LL_FOREACH_SAFE(pList, del, tmp)\r
 225         {\r
 226             LL_DELETE(pList, del);\r
 227             if (del && del->prm)\r
 228             {\r
 229                 OICFree(del->prm);\r
 230             }\r
 231         }\r
 232     }\r
 233 }\r
 234 \r
 235 bool DPGenerateQuery(bool isSecure,\r
 236                      const char* address, const uint16_t port,\r
 237                      const OCConnectivityType connType,\r
 238                      char* buffer, size_t bufferSize, const char* uri)\r
 239 {\r
 240     if(!address || !buffer || !uri)\r
 241     {\r
 242         OIC_LOG(ERROR, TAG, "DPGenerateQuery : Invalid parameters.");\r
 243         return false;\r
 244     }\r
 245 \r
 246     static char QPREFIX_COAP[] =  "coap://";\r
 247     static char QPREFIX_COAPS[] = "coaps://";\r
 248     static char QPREFIX_COAP_TCP[] =  "coap+tcp://";\r
 249     static char QPREFIX_COAPS_TCP[] = "coaps+tcp://";\r
 250 \r
 251     int snRet = 0;\r
 252     char* prefix = (isSecure == true) ? QPREFIX_COAPS : QPREFIX_COAP;\r
 253 \r
 254     switch(connType & CT_MASK_ADAPTER)\r
 255     {\r
 256 // @todo: Remove this ifdef. On Arduino, CT_ADAPTER_TCP resolves to the same value\r
 257 // as CT_ADAPTER_IP, resulting in a compiler error.\r
 258 #ifdef WITH_TCP\r
 259 #ifndef WITH_ARDUINO\r
 260         case CT_ADAPTER_TCP:\r
 261             prefix = (isSecure == true) ? QPREFIX_COAPS_TCP : QPREFIX_COAP_TCP;\r
 262 #endif\r
 263 #endif\r
 264         case CT_ADAPTER_IP:\r
 265             switch(connType & CT_MASK_FLAGS & ~CT_FLAG_SECURE)\r
 266             {\r
 267                 case CT_IP_USE_V4:\r
 268                         snRet = snprintf(buffer, bufferSize, "%s%s:%d%s",\r
 269                                          prefix, address, port, uri);\r
 270                     break;\r
 271                 case CT_IP_USE_V6:\r
 272                         snRet = snprintf(buffer, bufferSize, "%s[%s]:%d%s",\r
 273                                          prefix, address, port, uri);\r
 274                     break;\r
 275                 default:\r
 276                     OIC_LOG(ERROR, TAG, "Unknown address format.");\r
 277                     return false;\r
 278             }\r
 279             // snprintf return value check\r
 280             if (snRet < 0)\r
 281             {\r
 282                 OIC_LOG_V(ERROR, TAG, "DPGenerateQuery : Error (snprintf) %d\n", snRet);\r
 283                 return false;\r
 284             }\r
 285             else if ((size_t)snRet >= bufferSize)\r
 286             {\r
 287                 OIC_LOG_V(ERROR, TAG, "DPGenerateQuery : Truncated (snprintf) %d\n", snRet);\r
 288                 return false;\r
 289             }\r
 290 \r
 291             break;\r
 292 #ifndef WITH_ARDUINO\r
 293         // TODO: We need to verify tinyDTLS in below cases\r
 294         case CT_ADAPTER_GATT_BTLE:\r
 295         case CT_ADAPTER_RFCOMM_BTEDR:\r
 296             OIC_LOG(ERROR, TAG, "Not supported connectivity adapter.");\r
 297             return false;\r
 298             break;\r
 299 #endif\r
 300         default:\r
 301             OIC_LOG(ERROR, TAG, "Unknown connectivity adapter.");\r
 302             return false;\r
 303     }\r
 304 \r
 305     return true;\r
 306 }\r
 307 \r
 308 const OCDirectPairingDev_t* DPGetDiscoveredDevices()\r
 309 {\r
 310     return g_dp_discover;\r
 311 }\r
 312 \r
 313 const OCDirectPairingDev_t* DPGetPairedDevices()\r
 314 {\r
 315     return g_dp_paired;\r
 316 }\r
 317 \r
 318 void DPDeleteLists()\r
 319 {\r
 320     delList(g_dp_discover);\r
 321     delList(g_dp_paired);\r
 322 }\r
 323 \r
 324 /**\r
 325  * Callback handler of FinalizeDirectPairing.\r
 326  *\r
 327  * @param[in] ctx             ctx value passed to callback from calling function.\r
 328  * @param[in] UNUSED          handle to an invocation\r
 329  * @param[in] clientResponse  Response from queries to remote servers.\r
 330  * @return  OC_STACK_DELETE_TRANSACTION to delete the transaction\r
 331  *          and  OC_STACK_KEEP_TRANSACTION to keep it.\r
 332  */\r
 333 static OCStackApplicationResult DirectPairingFinalizeHandler(void *ctx, OCDoHandle UNUSED,\r
 334                                                   OCClientResponse *clientResponse)\r
 335 {\r
 336     OIC_LOG_V(INFO, TAG, "IN DirectPairingFinalizeHandler()");\r
 337     (void)UNUSED;\r
 338     if(NULL == ctx)\r
 339     {\r
 340         OIC_LOG(ERROR, TAG, "Context is Null");\r
 341         return OC_STACK_DELETE_TRANSACTION;\r
 342     }\r
 343 \r
 344     OCStackResult res;\r
 345     DPairData_t *dpairData = (DPairData_t*)ctx;\r
 346     OCDirectPairingDev_t *peer = dpairData->peer;\r
 347     OCDirectPairingResultCB resultCallback = dpairData->resultCallback;\r
 348 \r
 349     if (clientResponse)\r
 350     {\r
 351         if(OC_STACK_RESOURCE_CHANGED == clientResponse->result)\r
 352         {\r
 353             // result\r
 354             OIC_LOG(INFO, TAG, "DirectPairingFinalizeHandler : success PUT"\r
 355                     " request to /oic/sec/dpairing");\r
 356 \r
 357             CAEndpoint_t endpoint;\r
 358             memset(&endpoint, 0x00, sizeof(CAEndpoint_t));\r
 359             OICStrcpy(endpoint.addr, MAX_ADDR_STR_SIZE_CA, peer->endpoint.addr);\r
 360             endpoint.addr[MAX_ADDR_STR_SIZE_CA - 1] = '\0';\r
 361             endpoint.port = peer->securePort;\r
 362 \r
 363             OicUuid_t ptDeviceID = {.id={0}};\r
 364             if (OC_STACK_OK != GetDoxmDeviceID(&ptDeviceID))\r
 365             {\r
 366                 OIC_LOG(ERROR, TAG, "Error while retrieving provisioning tool's device ID");\r
 367                 resultCallback(dpairData->userCtx, peer, OC_STACK_ERROR);\r
 368                 return OC_STACK_DELETE_TRANSACTION;\r
 369             }\r
 370 \r
 371 #ifdef __WITH_DTLS__\r
 372             res = SavePairingPSK((OCDevAddr*)&endpoint, &peer->deviceID, &ptDeviceID, false);\r
 373             if(OC_STACK_OK != res)\r
 374             {\r
 375                 OIC_LOG(ERROR, TAG, "Failed to PairingPSK generation");\r
 376                 resultCallback(dpairData->userCtx, peer, res);\r
 377                 return OC_STACK_DELETE_TRANSACTION;\r
 378             }\r
 379 \r
 380             //  close temporary sesion\r
 381             CAResult_t caResult = CACloseDtlsSession((const CAEndpoint_t*)&endpoint);\r
 382             if(CA_STATUS_OK != caResult)\r
 383             {\r
 384                 OIC_LOG(INFO, TAG, "Fail to close temporary dtls session");\r
 385             }\r
 386 \r
 387             caResult = CASelectCipherSuite(TLS_NULL_WITH_NULL_NULL, CA_ADAPTER_IP);\r
 388             if(CA_STATUS_OK != caResult)\r
 389             {\r
 390                 OIC_LOG(ERROR, TAG, "Failed to select TLS_NULL_WITH_NULL_NULL");\r
 391             }\r
 392 #endif // __WITH_DTLS__\r
 393 \r
 394             OIC_LOG(INFO, TAG, "Direct-Papring was successfully completed.");\r
 395 \r
 396             // update paired list\r
 397             OCDirectPairingDev_t *dev = getDev(&g_dp_discover, peer->endpoint.addr,\r
 398                     peer->endpoint.port);\r
 399             res = addDev2(&g_dp_paired, dev);\r
 400             if (OC_STACK_OK != res)\r
 401             {\r
 402                 OIC_LOG(ERROR, TAG, "Error while adding a device to paired list.");\r
 403             }\r
 404 \r
 405             resultCallback(dpairData->userCtx, peer, OC_STACK_OK);\r
 406 \r
 407             return OC_STACK_DELETE_TRANSACTION;\r
 408         }\r
 409         else\r
 410         {\r
 411             OIC_LOG(INFO, TAG, "Direct-Papring received error response.");\r
 412         }\r
 413     }\r
 414     else\r
 415     {\r
 416         OIC_LOG(ERROR, TAG, "DirectPairingFinalizeHandler received Null clientResponse");\r
 417     }\r
 418 \r
 419     resultCallback(dpairData->userCtx, peer, OC_STACK_ERROR);\r
 420     OICFree(dpairData);\r
 421     return OC_STACK_DELETE_TRANSACTION;\r
 422 }\r
 423 \r
 424 /**\r
 425  * Finalize direct-pairing .\r
 426  *\r
 427  * @param[in] peer  target device to establish direct-pairing.\r
 428  * @param[in] resultCallback  result event callback.\r
 429  *\r
 430  * @return OC_STACK_OK on success otherwise error.\r
 431  */\r
 432 OCStackResult FinalizeDirectPairing(void *ctx, OCDirectPairingDev_t* peer,\r
 433                                                      OCDirectPairingResultCB resultCallback)\r
 434 {\r
 435     if(NULL == peer)\r
 436     {\r
 437         return OC_STACK_INVALID_PARAM;\r
 438     }\r
 439 \r
 440     OicUuid_t deviceID =   {.id={0}};\r
 441     if (OC_STACK_OK != GetDoxmDeviceID(&deviceID))\r
 442     {\r
 443         OIC_LOG(ERROR, TAG, "Error while retrieving device ID");\r
 444         return OC_STACK_ERROR;\r
 445     }\r
 446 \r
 447     OicSecDpairing_t dpair;\r
 448     memset(&dpair, 0, sizeof(OicSecDpairing_t));\r
 449     dpair.spm = (OicSecPrm_t)PRM_NOT_ALLOWED;\r
 450     memcpy(&dpair.pdeviceID, &deviceID, sizeof(OicUuid_t));\r
 451 \r
 452     OCSecurityPayload* secPayload = (OCSecurityPayload*)OICCalloc(1, sizeof(OCSecurityPayload));\r
 453     if(!secPayload)\r
 454     {\r
 455         OIC_LOG(ERROR, TAG, "Failed to memory allocation");\r
 456         return OC_STACK_NO_MEMORY;\r
 457     }\r
 458     secPayload->base.type = PAYLOAD_TYPE_SECURITY;\r
 459 \r
 460     OCStackResult ret = DpairingToCBORPayload(&dpair, &(secPayload->securityData),\r
 461             &(secPayload->payloadSize));\r
 462 \r
 463     if(OC_STACK_OK != ret)\r
 464     {\r
 465         OICFree(secPayload);\r
 466         OIC_LOG(ERROR, TAG, "Failed to DpairingToCBORPayload");\r
 467         return OC_STACK_NO_MEMORY;\r
 468     }\r
 469     OIC_LOG(INFO, TAG, "DPARING CBOR data:");\r
 470     OIC_LOG_BUFFER(INFO, TAG, secPayload->securityData, secPayload->payloadSize);\r
 471 \r
 472     char query[MAX_URI_LENGTH + MAX_QUERY_LENGTH] = {0};\r
 473     if(!DPGenerateQuery(true,\r
 474                         peer->endpoint.addr,\r
 475                         peer->securePort,\r
 476                         peer->connType,\r
 477                         query, sizeof(query), OIC_RSRC_DPAIRING_URI))\r
 478     {\r
 479         OIC_LOG(ERROR, TAG, "DPDirectPairing : Failed to generate query");\r
 480         return OC_STACK_ERROR;\r
 481     }\r
 482     OIC_LOG_V(DEBUG, TAG, "Query=%s", query);\r
 483 \r
 484     DPairData_t *dpairData = (DPairData_t *) OICCalloc(1, sizeof(DPairData_t));\r
 485     if (dpairData == NULL)\r
 486     {\r
 487         OICFree(secPayload->securityData);\r
 488         OICFree(secPayload);\r
 489         OIC_LOG(ERROR, TAG, "Unable to allocate memory");\r
 490         return OC_STACK_NO_MEMORY;\r
 491     }\r
 492     dpairData->peer = peer;\r
 493     dpairData->resultCallback = resultCallback;\r
 494     dpairData->userCtx = ctx;\r
 495 \r
 496     OCCallbackData cbData =  {.context=NULL, .cb=NULL, .cd=NULL};\r
 497     cbData.cb = DirectPairingFinalizeHandler;\r
 498     cbData.context = (void*)dpairData;\r
 499     cbData.cd = NULL;\r
 500 \r
 501     OCMethod method = OC_REST_PUT;\r
 502     OCDoHandle handle = NULL;\r
 503     OIC_LOG(DEBUG, TAG, "Sending DPAIRNG setting to resource server");\r
 504     ret = OCDoResource(&handle, method, query,\r
 505             &peer->endpoint, (OCPayload*)secPayload,\r
 506             peer->connType, OC_LOW_QOS, &cbData, NULL, 0);\r
 507     if(OC_STACK_OK != ret)\r
 508     {\r
 509         OIC_LOG(ERROR, TAG, "error in OCDoResource");\r
 510         return OC_STACK_ERROR;\r
 511     }\r
 512 \r
 513     return OC_STACK_OK;\r
 514  }\r
 515 \r
 516 /**\r
 517  * Function to handle the handshake result in Direct-Pairing.\r
 518  * This function will be invoked after DTLS handshake\r
 519  * @param   endPoint  [IN] The remote endpoint.\r
 520  * @param   errorInfo [IN] Error information from the endpoint.\r
 521  * @return  NONE\r
 522  */\r
 523 void DirectPairingDTLSHandshakeCB(const CAEndpoint_t *endpoint, const CAErrorInfo_t *info)\r
 524 {\r
 525     OIC_LOG_V(INFO, TAG, "IN DirectPairingDTLSHandshakeCB");\r
 526 \r
 527 \r
 528     if(g_dp_proceed_ctx && g_dp_proceed_ctx->peer && endpoint && info)\r
 529     {\r
 530         OIC_LOG_V(INFO, TAG, "Received status from remote device(%s:%d) : %d",\r
 531                  endpoint->addr, endpoint->port, info->result);\r
 532 \r
 533         OCDirectPairingDev_t *peer = g_dp_proceed_ctx->peer;\r
 534         OCDirectPairingResultCB resultCallback = g_dp_proceed_ctx->resultCallback;\r
 535         OCStackResult res;\r
 536 \r
 537         //Make sure the address matches.\r
 538         if(strncmp(peer->endpoint.addr, endpoint->addr, sizeof(endpoint->addr)) == 0 &&\r
 539                          peer->securePort == endpoint->port)\r
 540         {\r
 541             //In case of success, send next coaps request.\r
 542             if(CA_STATUS_OK == info->result)\r
 543             {\r
 544                 OIC_LOG(INFO, TAG, "Now, finalize Direct-Pairing procedure.");\r
 545 \r
 546                 res = FinalizeDirectPairing(g_dp_proceed_ctx->userCtx, peer, resultCallback);\r
 547                 if(OC_STACK_OK != res)\r
 548                 {\r
 549                     OIC_LOG(ERROR, TAG, "Failed to finalize direct-pairing");\r
 550                     resultCallback(g_dp_proceed_ctx->userCtx, peer, res);\r
 551                 }\r
 552             }\r
 553             else if(CA_DTLS_AUTHENTICATION_FAILURE == info->result)\r
 554             {\r
 555                 OIC_LOG(INFO, TAG, "DirectPairingDTLSHandshakeCB - Authentication failed");\r
 556                 resultCallback(g_dp_proceed_ctx->userCtx, peer, OC_STACK_AUTHENTICATION_FAILURE);\r
 557             }\r
 558 \r
 559 #ifdef __WITH_DTLS__\r
 560             CARegisterDTLSHandshakeCallback(NULL);\r
 561 #endif // __WITH_DTLS__\r
 562             res = RemoveCredential(&peer->deviceID);\r
 563             if(OC_STACK_RESOURCE_DELETED != res)\r
 564             {\r
 565                 OIC_LOG_V(ERROR, TAG, "Failed to remove temporal PSK : %d", res);\r
 566             }\r
 567 \r
 568             OICFree(g_dp_proceed_ctx);\r
 569             g_dp_proceed_ctx = NULL;\r
 570         }\r
 571         else\r
 572         {\r
 573             OIC_LOG_V(INFO, TAG, "DirectPairingDTLSHandshakeCB - Not matched to peer address");\r
 574         }\r
 575     }\r
 576 \r
 577     OIC_LOG_V(INFO, TAG, "OUT DirectPairingDTLSHandshakeCB");\r
 578 }\r
 579 \r
 580 /**\r
 581  * Callback handler of DPDirectPairing.\r
 582  *\r
 583  * @param[in] ctx             ctx value passed to callback from calling function.\r
 584  * @param[in] UNUSED          handle to an invocation\r
 585  * @param[in] clientResponse  Response from queries to remote servers.\r
 586  * @return  OC_STACK_DELETE_TRANSACTION to delete the transaction\r
 587  *          and  OC_STACK_KEEP_TRANSACTION to keep it.\r
 588  */\r
 589 static OCStackApplicationResult DirectPairingHandler(void *ctx, OCDoHandle UNUSED,\r
 590                                                   OCClientResponse *clientResponse)\r
 591 {\r
 592     OIC_LOG_V(INFO, TAG, "IN DirectPairingHandler.");\r
 593     (void)UNUSED;\r
 594     if(NULL == ctx)\r
 595     {\r
 596         OIC_LOG(ERROR, TAG, "Context is Null");\r
 597         return OC_STACK_DELETE_TRANSACTION;\r
 598     }\r
 599 \r
 600     OCStackResult res = OC_STACK_ERROR;\r
 601     DPairData_t *dpairData = (DPairData_t*)ctx;\r
 602     OCDirectPairingResultCB resultCallback = (OCDirectPairingResultCB)dpairData->resultCallback;\r
 603     OicUuid_t subjectId = {.id={0}};\r
 604 \r
 605     if (clientResponse)\r
 606     {\r
 607         if(OC_STACK_RESOURCE_CHANGED == clientResponse->result)\r
 608         {\r
 609             // result\r
 610             OIC_LOG(INFO, TAG, "DirectPairingHandler : success POST request to /oic/sec/dpairing");\r
 611 \r
 612 #ifdef __WITH_DTLS__\r
 613             // Add temporary psk\r
 614             res = AddTmpPskWithPIN(&dpairData->peer->deviceID,\r
 615                            SYMMETRIC_PAIR_WISE_KEY,\r
 616                            (char*)dpairData->pin, DP_PIN_LENGTH,\r
 617                            &dpairData->peer->rowner, &subjectId);\r
 618             VERIFY_SUCCESS(TAG, OC_STACK_OK == res, ERROR);\r
 619 \r
 620 \r
 621             // Start to establish a secure channel with Pin-based PSK cipher suite\r
 622             CAResult_t caresult;\r
 623 \r
 624             caresult = CAEnableAnonECDHCipherSuite(false);\r
 625             VERIFY_SUCCESS(TAG, CA_STATUS_OK == caresult, ERROR);\r
 626 \r
 627             caresult = CASelectCipherSuite(TLS_ECDHE_PSK_WITH_AES_128_CBC_SHA_256, CA_ADAPTER_IP);\r
 628             VERIFY_SUCCESS(TAG, CA_STATUS_OK == caresult, ERROR);\r
 629 \r
 630             //Register proceeding peer info. & DTLS event handler to catch the dtls event while handshake\r
 631             g_dp_proceed_ctx = dpairData;\r
 632             res = CARegisterDTLSHandshakeCallback(DirectPairingDTLSHandshakeCB);\r
 633             VERIFY_SUCCESS(TAG, CA_STATUS_OK == caresult, ERROR);\r
 634 \r
 635             // initiate dtls\r
 636             CAEndpoint_t *endpoint = (CAEndpoint_t *)OICCalloc(1, sizeof (CAEndpoint_t));\r
 637             VERIFY_NON_NULL(TAG, endpoint, FATAL);\r
 638             memcpy(endpoint,&dpairData->peer->endpoint,sizeof(CAEndpoint_t));\r
 639             endpoint->port = dpairData->peer->securePort;\r
 640             OIC_LOG_V(INFO, TAG, "Initiate DTLS handshake to %s(%d)", endpoint->addr,\r
 641                     endpoint->port);\r
 642 \r
 643             caresult = CAInitiateHandshake(endpoint);\r
 644             OICFree(endpoint);\r
 645             VERIFY_SUCCESS(TAG, CA_STATUS_OK == caresult, ERROR);\r
 646 #endif // __WITH_DTLS__\r
 647 \r
 648             res = OC_STACK_OK;\r
 649         }\r
 650         else\r
 651         {\r
 652             // result\r
 653             OIC_LOG(INFO, TAG, "DirectPairingHandler : fail POST request to /oic/sec/dpairing");\r
 654         }\r
 655     }\r
 656     else\r
 657     {\r
 658         OIC_LOG(ERROR, TAG, "DirectPairingHandler received Null clientResponse");\r
 659     }\r
 660 \r
 661 #ifdef __WITH_DTLS__\r
 662 exit:\r
 663 #endif // __WITH_DTLS__\r
 664 \r
 665     if (OC_STACK_OK != res)\r
 666     {\r
 667         if (0 < strlen((const char*)subjectId.id))\r
 668         {\r
 669             RemoveCredential(&dpairData->peer->deviceID);\r
 670             OICFree(dpairData);\r
 671             g_dp_proceed_ctx = NULL;\r
 672         }\r
 673 \r
 674         resultCallback(dpairData->userCtx, dpairData->peer, res);\r
 675     }\r
 676     OIC_LOG_V(INFO, TAG, "OUT DirectPairingHandler.");\r
 677     return OC_STACK_DELETE_TRANSACTION;\r
 678 }\r
 679 \r
 680 /**\r
 681  * Start direct-pairing .\r
 682  *\r
 683  * @param[in] peer  target device to establish direct-pairing.\r
 684  * @param[in] pmSel  selected pairing method.\r
 685  * @param[in] pinNumber  secret value for dtls connection.\r
 686  *\r
 687  * @return OC_STACK_OK on success otherwise error.\r
 688  */\r
 689 OCStackResult DPDirectPairing(void *ctx, OCDirectPairingDev_t* peer, OicSecPrm_t pmSel,\r
 690                                 char *pinNumber, OCDirectPairingResultCB resultCallback)\r
 691 {\r
 692     if(NULL == peer || NULL == pinNumber)\r
 693     {\r
 694         return OC_STACK_INVALID_PARAM;\r
 695     }\r
 696 \r
 697     OicUuid_t deviceID =   {.id={0}};\r
 698     if (OC_STACK_OK != GetDoxmDeviceID(&deviceID))\r
 699     {\r
 700         OIC_LOG(ERROR, TAG, "Error while retrieving device ID");\r
 701         return OC_STACK_ERROR;\r
 702     }\r
 703 \r
 704     OicSecDpairing_t dpair;\r
 705     memset(&dpair, 0, sizeof(OicSecDpairing_t));\r
 706     dpair.spm = pmSel;\r
 707     memcpy(&dpair.pdeviceID, &deviceID, sizeof(OicUuid_t));\r
 708 \r
 709     OCSecurityPayload* secPayload = (OCSecurityPayload*)OICCalloc(1, sizeof(OCSecurityPayload));\r
 710     if(!secPayload)\r
 711     {\r
 712         OIC_LOG(ERROR, TAG, "Failed to memory allocation");\r
 713         return OC_STACK_NO_MEMORY;\r
 714     }\r
 715     secPayload->base.type = PAYLOAD_TYPE_SECURITY;\r
 716 \r
 717     OCStackResult ret = DpairingToCBORPayload(&dpair, &(secPayload->securityData),\r
 718             &(secPayload->payloadSize));\r
 719 \r
 720     if(OC_STACK_OK != ret)\r
 721     {\r
 722         OICFree(secPayload);\r
 723         OIC_LOG(ERROR, TAG, "Failed to DpairingToCBORPayload");\r
 724         return OC_STACK_NO_MEMORY;\r
 725     }\r
 726     OIC_LOG(INFO, TAG, "DPARING CBOR data:");\r
 727     OIC_LOG_BUFFER(INFO, TAG, secPayload->securityData, secPayload->payloadSize);\r
 728 \r
 729     char query[MAX_URI_LENGTH + MAX_QUERY_LENGTH] = {0};\r
 730     if(!DPGenerateQuery(false,\r
 731                         peer->endpoint.addr,\r
 732                         peer->endpoint.port,\r
 733                         //peer->securePort,\r
 734                         peer->connType,\r
 735                         query, sizeof(query), OIC_RSRC_DPAIRING_URI))\r
 736     {\r
 737         OIC_LOG(ERROR, TAG, "DPDirectPairing : Failed to generate query");\r
 738         return OC_STACK_ERROR;\r
 739     }\r
 740     OIC_LOG_V(DEBUG, TAG, "Query=%s", query);\r
 741 \r
 742     DPairData_t *dpairData = (DPairData_t *) OICCalloc(1, sizeof(DPairData_t));\r
 743     if (dpairData == NULL)\r
 744     {\r
 745         OICFree(secPayload->securityData);\r
 746         OICFree(secPayload);\r
 747         OIC_LOG(ERROR, TAG, "Unable to allocate memory");\r
 748         return OC_STACK_NO_MEMORY;\r
 749     }\r
 750     dpairData->peer = peer;\r
 751     memcpy(dpairData->pin, pinNumber, DP_PIN_LENGTH);\r
 752     dpairData->resultCallback = resultCallback;\r
 753     dpairData->userCtx = ctx;\r
 754 \r
 755     OCCallbackData cbData =  {.context=NULL, .cb=NULL, .cd=NULL};\r
 756     cbData.cb = DirectPairingHandler;\r
 757     cbData.context = (void*)dpairData;\r
 758     cbData.cd = NULL;\r
 759 \r
 760     OCMethod method = OC_REST_POST;\r
 761     OCDoHandle handle = NULL;\r
 762     OIC_LOG(DEBUG, TAG, "Sending DPAIRNG setting to resource server");\r
 763     ret = OCDoResource(&handle, method, query,\r
 764             &peer->endpoint, (OCPayload*)secPayload,\r
 765             peer->connType, OC_LOW_QOS, &cbData, NULL, 0);\r
 766     if(OC_STACK_OK != ret)\r
 767     {\r
 768         OIC_LOG(ERROR, TAG, "error in OCDoResource");\r
 769         return OC_STACK_ERROR;\r
 770     }\r
 771 \r
 772     return OC_STACK_OK;\r
 773 \r
 774  }\r
 775 \r
 776 /**\r
 777  * Callback handler for getting secure port information using /oic/res discovery.\r
 778  *\r
 779  * @param[in] ctx             user context\r
 780  * @param[in] handle          Handle for response\r
 781  * @param[in] clientResponse  Response information(It will contain payload)\r
 782  *\r
 783  * @return OC_STACK_KEEP_TRANSACTION to keep transaction and\r
 784  *         OC_STACK_DELETE_TRANSACTION to delete it.\r
 785  */\r
 786 static OCStackApplicationResult DirectPairingPortDiscoveryHandler(void *ctx, OCDoHandle UNUSED,\r
 787                                  OCClientResponse *clientResponse)\r
 788 {\r
 789     OIC_LOG(INFO, TAG, "Callback Context for Direct-Pairing Secure Port DISCOVER "\r
 790             "query recvd successfully");\r
 791 \r
 792     (void)ctx;\r
 793     (void)UNUSED;\r
 794     if (clientResponse)\r
 795     {\r
 796         if  (NULL == clientResponse->payload)\r
 797         {\r
 798             OIC_LOG(INFO, TAG, "Skiping Null payload");\r
 799         }\r
 800         else\r
 801         {\r
 802             if (PAYLOAD_TYPE_DISCOVERY != clientResponse->payload->type)\r
 803             {\r
 804                 OIC_LOG(INFO, TAG, "Wrong payload type");\r
 805                 return OC_STACK_DELETE_TRANSACTION;\r
 806             }\r
 807 \r
 808             uint16_t securePort = 0;\r
 809             OCResourcePayload* resPayload = ((OCDiscoveryPayload*)clientResponse->payload)->resources;\r
 810             OIC_LOG_PAYLOAD(INFO, clientResponse->payload);\r
 811 \r
 812             if (resPayload && resPayload->secure)\r
 813             {\r
 814                 securePort = resPayload->port;\r
 815             }\r
 816             else\r
 817             {\r
 818                 OIC_LOG(INFO, TAG, "Can not find secure port information.");\r
 819                 return OC_STACK_DELETE_TRANSACTION;\r
 820             }\r
 821 \r
 822             OCDirectPairingDev_t *ptr = getDev(&g_dp_discover,\r
 823                     clientResponse->devAddr.addr, clientResponse->devAddr.port);\r
 824             if(!ptr)\r
 825             {\r
 826                 OIC_LOG(ERROR, TAG, "Can not find device information in the discovery device list");\r
 827                 return OC_STACK_DELETE_TRANSACTION;\r
 828             }\r
 829             ptr->securePort = securePort;\r
 830 \r
 831             OIC_LOG(INFO, TAG, "Exiting DirectPairingPortDiscoveryHandler.");\r
 832         }\r
 833 \r
 834         return  OC_STACK_DELETE_TRANSACTION;\r
 835     }\r
 836     else\r
 837     {\r
 838         OIC_LOG(INFO, TAG, "Skiping Null response");\r
 839     }\r
 840     return  OC_STACK_DELETE_TRANSACTION;\r
 841 }\r
 842 \r
 843 /**\r
 844  * Callback handler for DPDeviceDiscovery API.\r
 845  *\r
 846  * @param[in] ctx             User context\r
 847  * @param[in] handle          Handler for response\r
 848  * @param[in] clientResponse  Response information (It will contain payload)\r
 849  * @return OC_STACK_KEEP_TRANSACTION to keep transaction and\r
 850  *         OC_STACK_DELETE_TRANSACTION to delete it.\r
 851  */\r
 852 static OCStackApplicationResult DirectPairingDiscoveryHandler(void* ctx, OCDoHandle UNUSED,\r
 853         OCClientResponse * clientResponse)\r
 854 {\r
 855     OIC_LOG(INFO, TAG, "Callback Context for Direct-Pairing DISCOVER query recvd successfully");\r
 856 \r
 857     (void)ctx;\r
 858     (void)UNUSED;\r
 859     if (clientResponse)\r
 860     {\r
 861         OIC_LOG_V(INFO, TAG, "StackResult: %d", clientResponse->result);\r
 862         OIC_LOG_V(INFO, TAG,\r
 863                 "Device =============> Discovered @ %s:%d",\r
 864                 clientResponse->devAddr.addr,\r
 865                 clientResponse->devAddr.port);\r
 866 \r
 867         if  (NULL == clientResponse->payload)\r
 868         {\r
 869             OIC_LOG(INFO, TAG, "Skiping Null payload");\r
 870             return OC_STACK_KEEP_TRANSACTION;\r
 871         }\r
 872         if (OC_STACK_OK != clientResponse->result)\r
 873         {\r
 874             OIC_LOG(INFO, TAG, "Error in response");\r
 875             return OC_STACK_KEEP_TRANSACTION;\r
 876         }\r
 877 \r
 878         OIC_LOG_PAYLOAD(INFO, clientResponse->payload);\r
 879         OicSecPconf_t *pconf = NULL;\r
 880 \r
 881         OCStackResult res = CBORPayloadToPconf(\r
 882                 ((OCSecurityPayload*)clientResponse->payload)->securityData,\r
 883                 CBOR_SIZE,&pconf);\r
 884         if (OC_STACK_OK != res )\r
 885         {\r
 886             OIC_LOG(INFO, TAG, "Ignoring malformed CBOR");\r
 887             return OC_STACK_KEEP_TRANSACTION;\r
 888         }\r
 889         else\r
 890         {\r
 891             if(pconf->edp)\r
 892             {\r
 893                 OCDevAddr endpoint;\r
 894                 memcpy(&endpoint, &clientResponse->devAddr, sizeof(OCDevAddr));\r
 895 \r
 896                 OCStackResult res = addDev(&g_dp_discover, &endpoint,\r
 897                             clientResponse->connType, pconf);\r
 898                 DeletePconfBinData(pconf);\r
 899                 if (OC_STACK_OK != res)\r
 900                 {\r
 901                     OIC_LOG(ERROR, TAG, "Error while adding data to linkedlist.");\r
 902                     return OC_STACK_KEEP_TRANSACTION;\r
 903                 }\r
 904 \r
 905 \r
 906                 char rsrc_uri[MAX_URI_LENGTH+1] = {0};\r
 907                 int wr_len = snprintf(rsrc_uri, sizeof(rsrc_uri), "%s?%s=%s",\r
 908                           OC_RSRVD_WELL_KNOWN_URI, OC_RSRVD_RESOURCE_TYPE, OIC_RSRC_TYPE_SEC_DPAIRING);\r
 909                 if(wr_len <= 0 || (size_t)wr_len >= sizeof(rsrc_uri))\r
 910                 {\r
 911                     OIC_LOG(ERROR, TAG, "rsrc_uri_string_print failed");\r
 912                     return OC_STACK_KEEP_TRANSACTION;\r
 913                 }\r
 914 \r
 915                 //Try to the unicast discovery to getting secure port\r
 916                 char query[MAX_URI_LENGTH+MAX_QUERY_LENGTH+1] = {0};\r
 917                 if(!DPGenerateQuery(false,\r
 918                                     clientResponse->devAddr.addr, clientResponse->devAddr.port,\r
 919                                     clientResponse->connType,\r
 920                                     query, sizeof(query), rsrc_uri))\r
 921                 {\r
 922                     OIC_LOG(ERROR, TAG, "DirectPairingDiscoveryHandler : Failed to generate query");\r
 923                     return OC_STACK_KEEP_TRANSACTION;\r
 924                 }\r
 925                 OIC_LOG_V(DEBUG, TAG, "Query=%s", query);\r
 926 \r
 927                 OCCallbackData cbData;\r
 928                 cbData.cb = &DirectPairingPortDiscoveryHandler;\r
 929                 cbData.context = NULL;\r
 930                 cbData.cd = NULL;\r
 931                 OCStackResult ret = OCDoResource(NULL, OC_REST_DISCOVER, query, 0, 0,\r
 932                         clientResponse->connType, OC_LOW_QOS, &cbData, NULL, 0);\r
 933                 if(OC_STACK_OK != ret)\r
 934                 {\r
 935                     OIC_LOG(ERROR, TAG, "Failed to Secure Port Discovery");\r
 936                     return OC_STACK_KEEP_TRANSACTION;\r
 937                 }\r
 938                 else\r
 939                 {\r
 940                     OIC_LOG_V(INFO, TAG, "OCDoResource with [%s] Success", query);\r
 941                 }\r
 942             }\r
 943             return  OC_STACK_KEEP_TRANSACTION;\r
 944         }\r
 945     }\r
 946     else\r
 947     {\r
 948         OIC_LOG(INFO, TAG, "Skiping Null response");\r
 949     }\r
 950 \r
 951     return OC_STACK_DELETE_TRANSACTION;\r
 952 }\r
 953 #ifndef WITH_ARDUINO\r
 954 /**\r
 955  * Discover direct-pairing devices in the same IP subnet. .\r
 956  *\r
 957  * @param[in] waittime  Timeout in seconds.\r
 958  *\r
 959  * @return OC_STACK_OK on success otherwise error.\r
 960  */\r
 961 OCStackResult DPDeviceDiscovery(unsigned short waittime)\r
 962 {\r
 963     OIC_LOG(DEBUG, TAG, "IN DPDeviceDiscovery");\r
 964 \r
 965     if (g_dp_discover)\r
 966     {\r
 967         delList(g_dp_discover);\r
 968         g_dp_discover = NULL;\r
 969     }\r
 970 \r
 971     OCStackResult ret;\r
 972 \r
 973     const char DP_DISCOVERY_QUERY[] = "/oic/sec/pconf";\r
 974 \r
 975     OCCallbackData cbData;\r
 976     cbData.cb = DirectPairingDiscoveryHandler;\r
 977     cbData.context = NULL;\r
 978     cbData.cd = NULL;\r
 979 \r
 980     /* Start a DP discovery query*/\r
 981     OIC_LOG_V(INFO, TAG, "Initiating Direct-Pairing Discovery : %s\n", DP_DISCOVERY_QUERY);\r
 982     OCDoHandle handle = NULL;\r
 983     ret = OCDoResource(&handle, OC_REST_DISCOVER, DP_DISCOVERY_QUERY, 0, 0, CT_DEFAULT,\r
 984                        OC_LOW_QOS, &cbData, NULL, 0);\r
 985     if (ret != OC_STACK_OK)\r
 986     {\r
 987         OIC_LOG(ERROR, TAG, "OCStack resource error");\r
 988         return ret;\r
 989     }\r
 990 \r
 991     // wait..\r
 992 \r
 993     int clock_res = -1;\r
 994 #if defined(_MSC_VER)\r
 995     time_t startTime = NULL;\r
 996     clock_res = (time(&startTime) == -1);\r
 997 #else\r
 998     struct timespec startTime = {.tv_sec=0, .tv_nsec=0};\r
 999 #if defined(__ANDROID__) || _POSIX_TIMERS > 0\r
1000     clock_res = clock_gettime(CLOCK_MONOTONIC, &startTime);\r
1001 #endif\r
1002 #endif\r
1003     if (0 != clock_res)\r
1004     {\r
1005         OIC_LOG(ERROR, TAG, "clock error");\r
1006         if(OC_STACK_OK !=  OCCancel(handle, OC_LOW_QOS, NULL, 0))\r
1007         {\r
1008             OIC_LOG(ERROR, TAG, "Failed to remove registered callback");\r
1009         }\r
1010         return OC_STACK_ERROR;\r
1011     }\r
1012 \r
1013     while (1)\r
1014     {\r
1015 #if defined(_MSC_VER)\r
1016         time_t currTime = NULL;\r
1017         clock_res = (time(&currTime) == -1);\r
1018 #else\r
1019         struct timespec currTime  = {.tv_sec=0, .tv_nsec=0};\r
1020 #if defined(__ANDROID__) || _POSIX_TIMERS > 0\r
1021         clock_res = clock_gettime(CLOCK_MONOTONIC, &currTime);\r
1022 #endif\r
1023 #endif\r
1024         if (0 != clock_res)\r
1025         {\r
1026             OIC_LOG(ERROR, TAG, "clock error");\r
1027             ret = OC_STACK_ERROR;\r
1028             break;\r
1029         }\r
1030 #if defined(_MSC_VER)\r
1031         long elapsed = currTime - startTime;\r
1032 #else\r
1033         long elapsed = (currTime.tv_sec - startTime.tv_sec);\r
1034 #endif\r
1035         if (elapsed > waittime)\r
1036         {\r
1037             break;\r
1038         }\r
1039         else\r
1040         {\r
1041             struct timespec timeout = {.tv_sec=0, .tv_nsec=100000000L};\r
1042             OCProcess();\r
1043             nanosleep(&timeout, NULL);\r
1044         }\r
1045     }\r
1046 \r
1047     // Waiting for each response.\r
1048     ret = OCCancel(handle, OC_LOW_QOS, NULL, 0);\r
1049     if (OC_STACK_OK != ret)\r
1050     {\r
1051         OIC_LOG(ERROR, TAG, "Failed to remove registered callback");\r
1052     }\r
1053     OIC_LOG(DEBUG, TAG, "OUT DPDeviceDiscovery");\r
1054     return ret;\r
1055 }\r
1056 #endif\r