resource/csdk/connectivity/src/ip_adapter/caipserver.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 "caipinterface.h"
  22
  23 #include <sys/types.h>
  24 #include <sys/socket.h>
  25 #include <unistd.h>
  26 #include <fcntl.h>
  27 #include <sys/select.h>
  28 #include <arpa/inet.h>
  29 #include <netinet/in.h>
  30 #include <errno.h>
  31
  32 #include "pdu.h"
  33 #include "caadapterutils.h"
  34 #ifdef __WITH_DTLS__
  35 #include "caadapternetdtls.h"
  36 #endif
  37 #include "camutex.h"
  38 #include "oic_malloc.h"
  39
  40 /**
  41  * @def IP_SERVER_TAG
  42  * @brief Logging tag for module name
  43  */
  44 #define IP_SERVER_TAG "IP_SERVER"
  45
  46 /**
  47  * @def CA_UDP_BIND_RETRY_COUNT
  48  * @brief Retry count in case of socket bind failure.
  49  */
  50 #define CA_UDP_BIND_RETRY_COUNT 10
  51
  52 /**
  53  * @def IPNAMESIZE
  54  * @brief Max length for ip address.
  55  */
  56 #define IPNAMESIZE 16
  57
  58 /**
  59  * @def SOCKETOPTION
  60  * @brief Socket option.
  61  */
  62 #define SOCKETOPTION 1
  63
  64 /**
  65  * @var g_packetHandlerStopFlag
  66  * @brief Flag for stopping packet handler thread.
  67  */
  68 static bool g_packetHandlerStopFlag = false;
  69
  70 /**
  71  * @var CAAdapterIPServerContext_t
  72  * @brief Thread context information for callbacks and threadpool.
  73  */
  74 typedef struct
  75 {
  76     ca_thread_pool_t threadPool;
  77     CAIPPacketReceivedCallback packetReceivedCallback;
  78     CAIPExceptionCallback exceptionCallback;
  79 } CAAdapterIPServerContext_t;
  80
  81 /**
  82  * @var g_serverInfoList
  83  * @brief Mutex to synchronize ethenet adapter context.
  84  */
  85 static u_arraylist_t *g_serverInfoList = NULL;
  86
  87 /**
  88  * @var g_mutexServerInfoList
  89  * @brief Mutex to synchronize Server Information.
  90  */
  91 static ca_mutex g_mutexServerInfoList = NULL;
  92
  93 /**
  94  * @var g_adapterEthServerContext
  95  * @brief Mutex to synchronize ethenet adapter context.
  96  */
  97 static CAAdapterIPServerContext_t *g_adapterEthServerContext = NULL;
  98
  99 /**
 100  * @var g_mutexAdapterServerContext
 101  * @brief Mutex to synchronize unicast server
 102  */
 103 static ca_mutex g_mutexAdapterServerContext = NULL;
 104
 105 static void CAReceiveHandler(void *data)
 106 {
 107     OIC_LOG(DEBUG, IP_SERVER_TAG, "IN");
 108
 109     fd_set readFds;
 110     int maxSd = 0;
 111     struct timeval timeout;
 112     char recvBuffer[COAP_MAX_PDU_SIZE] = { 0 };
 113
 114     while (true != g_packetHandlerStopFlag)
 115     {
 116         timeout.tv_sec = 1;
 117         timeout.tv_usec = 0;
 118         FD_ZERO(&readFds);
 119
 120         ca_mutex_lock(g_mutexServerInfoList);
 121         uint32_t listIndex = 0;
 122         uint32_t listLength = u_arraylist_length(g_serverInfoList);
 123
 124         u_arraylist_t *tempServerInfoList = u_arraylist_create();
 125         if (!tempServerInfoList)
 126         {
 127             OIC_LOG(ERROR, IP_SERVER_TAG, "u_arraylist_create failed");
 128             ca_mutex_unlock(g_mutexServerInfoList);
 129             return;
 130         }
 131
 132         for (listIndex = 0; listIndex < listLength; listIndex++)
 133         {
 134             CAServerInfo_t *info = (CAServerInfo_t *) u_arraylist_get(g_serverInfoList, listIndex);
 135             if (!info)
 136             {
 137                 listIndex++;
 138                 continue;
 139             }
 140
 141             int sd = info->socketFd;
 142             //if valid socket descriptor then add to read list
 143             if (sd > 0)
 144             {
 145                 FD_SET(sd, &readFds);
 146             }
 147
 148             //highest file descriptor number, need it for the select function
 149             if (sd > maxSd)
 150             {
 151                 maxSd = sd;
 152             }
 153
 154             CAServerInfo_t *newInfo = (CAServerInfo_t *) OICMalloc(sizeof(CAServerInfo_t));
 155             if (!newInfo)
 156             {
 157                 OIC_LOG(ERROR, IP_SERVER_TAG, "Malloc failed");
 158                 CAClearServerInfoList(tempServerInfoList);
 159                 ca_mutex_unlock(g_mutexServerInfoList);
 160                 return;
 161             }
 162
 163             memcpy(newInfo, info, sizeof(CAServerInfo_t));
 164
 165             CAResult_t result = u_arraylist_add(tempServerInfoList, (void *) newInfo);
 166             if (CA_STATUS_OK != result)
 167             {
 168                 OIC_LOG(ERROR, IP_SERVER_TAG, "u_arraylist_add failed!Thread exit");
 169                 CAClearServerInfoList(tempServerInfoList);
 170                 ca_mutex_unlock(g_mutexServerInfoList);
 171                 return;
 172             }
 173         }
 174
 175         ca_mutex_unlock(g_mutexServerInfoList);
 176
 177         int ret = select(maxSd + 1, &readFds, NULL, NULL, &timeout);
 178         if (g_packetHandlerStopFlag)
 179         {
 180             OIC_LOG_V(DEBUG, IP_SERVER_TAG,
 181                       "Packet receiver handler Stop request received. Thread exited");
 182             CAClearServerInfoList(tempServerInfoList);
 183             break;
 184         }
 185         if (ret < 0)
 186         {
 187             OIC_LOG_V(FATAL, IP_SERVER_TAG, "select returned error %s", strerror(errno));
 188             CAClearServerInfoList(tempServerInfoList);
 189             continue;
 190         }
 191
 192         listLength = u_arraylist_length(tempServerInfoList);
 193         for (listIndex = 0; listIndex < listLength; listIndex++)
 194         {
 195             CAServerInfo_t *info = (CAServerInfo_t *) u_arraylist_get(tempServerInfoList,
 196                                                                       listIndex);
 197             if (!info)
 198             {
 199                 continue;
 200             }
 201
 202             int sd = info->socketFd;
 203             if (FD_ISSET(sd , &readFds))
 204             {
 205                 OIC_LOG_V(ERROR, IP_SERVER_TAG,
 206                           "data Received server information ip %s, port %d socket %d",
 207                           info->ipAddress, info->port, sd);
 208                 memset(recvBuffer, 0, sizeof(recvBuffer));
 209
 210                 struct sockaddr_in srcSockAddress = { 0 };
 211                 socklen_t srcAddressLen = sizeof(srcSockAddress);
 212
 213                 //Reading from socket
 214                 ssize_t recvLen = recvfrom(sd, recvBuffer, sizeof(recvBuffer), 0,
 215                                            (struct sockaddr *) &srcSockAddress, &srcAddressLen);
 216                 if (-1 == recvLen)
 217                 {
 218                     OIC_LOG_V(ERROR, IP_SERVER_TAG, "Recvfrom failed %s", strerror(errno));
 219                     continue;
 220                 }
 221                 else if (0 == recvLen)
 222                 {
 223                     OIC_LOG_V(ERROR, IP_SERVER_TAG, "Server socket shutdown sock fd[%d]", sd);
 224                     ca_mutex_lock(g_mutexAdapterServerContext);
 225                     // Notify upper layer this exception
 226                     if (g_adapterEthServerContext->exceptionCallback)
 227                     {
 228                         // need to make proper exception callback.
 229                         //g_adapterEthServerContext->exceptionCallback(ctx->type);
 230                     }
 231                     ca_mutex_unlock(g_mutexAdapterServerContext);
 232                 }
 233
 234                 char srcIPAddress[CA_IPADDR_SIZE] = { 0 };
 235                 if (!inet_ntop(AF_INET, &srcSockAddress.sin_addr.s_addr, srcIPAddress,
 236                                sizeof(srcIPAddress)))
 237                 {
 238
 239                     OIC_LOG(ERROR, IP_SERVER_TAG, "inet_ntop is failed!");
 240                     continue;
 241                 }
 242
 243                 uint16_t srcPort = ntohs(srcSockAddress.sin_port);
 244
 245                 OIC_LOG_V(DEBUG, IP_SERVER_TAG, "Received packet from %s:%d len %d",
 246                           srcIPAddress, srcPort, recvLen);
 247
 248                 char *netMask = NULL;
 249                 if (CA_STATUS_OK != CAIPGetInterfaceSubnetMask(info->ifAddr, &netMask))
 250                 {
 251                     OIC_LOG(ERROR, IP_SERVER_TAG, "Failed to get IP subnet");
 252                     continue;
 253                 }
 254
 255                 if (!CAAdapterIsSameSubnet(info->ifAddr, srcIPAddress, netMask))
 256                 {
 257                     OIC_LOG(DEBUG, IP_SERVER_TAG,
 258                             "Packet received from different subnet, Ignore!");
 259                     OICFree(netMask);
 260                     continue;
 261                 }
 262                 OICFree(netMask);
 263
 264                 if (info->isSecured)
 265                 {
 266 #ifdef __WITH_DTLS__
 267                     CAResult_t ret = CAAdapterNetDtlsDecrypt(srcIPAddress, srcPort,
 268                                                              (uint8_t *)recvBuffer, recvLen,
 269                                                              DTLS_IP);
 270                     OIC_LOG_V(DEBUG, IP_SERVER_TAG,
 271                               "CAAdapterNetDtlsDecrypt returns [%d]", ret);
 272 #endif
 273                 }
 274                 else //both multicast and unicast
 275                 {
 276                     ca_mutex_lock(g_mutexAdapterServerContext);
 277
 278                     if (g_adapterEthServerContext->packetReceivedCallback)
 279                     {
 280                         g_adapterEthServerContext->packetReceivedCallback(srcIPAddress, srcPort,
 281                                                                           recvBuffer, recvLen,
 282                                                                           false);
 283                     }
 284
 285                     ca_mutex_unlock(g_mutexAdapterServerContext);
 286                 }
 287             }
 288         }
 289         CAClearServerInfoList(tempServerInfoList);
 290     }
 291     OIC_LOG(DEBUG, IP_SERVER_TAG, "OUT");
 292 }
 293
 294 static CAResult_t CACreateSocket(int *socketFD, const char *localIp, uint16_t *port,
 295                                  bool forceBindStart)
 296 {
 297     VERIFY_NON_NULL(socketFD, IP_SERVER_TAG, "socketFD is NULL");
 298     VERIFY_NON_NULL(localIp, IP_SERVER_TAG, "localIp is NULL");
 299     VERIFY_NON_NULL(port, IP_SERVER_TAG, "port is NULL");
 300     // Create a UDP socket
 301     int sock = -1;
 302
 303 #ifdef SOCK_CLOEXEC
 304     sock = socket(AF_INET, SOCK_DGRAM | SOCK_CLOEXEC, IPPROTO_UDP);
 305 #endif
 306
 307     if (-1 == sock)
 308     {
 309         sock = socket(AF_INET, SOCK_DGRAM, IPPROTO_UDP);
 310     }
 311
 312     if (-1 == sock)
 313     {
 314         OIC_LOG_V(ERROR, IP_SERVER_TAG, "Failed to create Socket, Error code: %s",
 315                   strerror(errno));
 316         return CA_STATUS_FAILED;
 317     }
 318
 319     // Make the socket non-blocking
 320     if (-1 == fcntl(sock, F_SETFL, O_NONBLOCK))
 321     {
 322         OIC_LOG_V(ERROR, IP_SERVER_TAG, "Failed to set non-block mode, Error code: %s",
 323                   strerror(errno));
 324
 325         close(sock);
 326         return CA_STATUS_FAILED;
 327     }
 328
 329     if (true == forceBindStart)
 330     {
 331         int setOptionOn = SOCKETOPTION;
 332         if (-1 == setsockopt(sock, SOL_SOCKET, SO_REUSEADDR, (char *) &setOptionOn,
 333                              sizeof(setOptionOn)))
 334         {
 335             OIC_LOG_V(ERROR, IP_SERVER_TAG, "Failed to set SO_REUSEADDR! Error code: %s",
 336                       strerror(errno));
 337             close(sock);
 338             return CA_STATUS_FAILED;
 339         }
 340     }
 341
 342     struct sockaddr_in sockAddr = { 0 };
 343     uint16_t serverPort = *port;
 344     sockAddr.sin_family = AF_INET;
 345     sockAddr.sin_port = htons(serverPort);
 346     if (localIp)
 347     {
 348         sockAddr.sin_addr.s_addr = inet_addr(localIp);
 349     }
 350     else
 351     {
 352         sockAddr.sin_addr.s_addr = htonl(INADDR_ANY);
 353     }
 354
 355     int16_t i = 0;
 356     bool isBound = false;
 357     for (i = 0; i < CA_UDP_BIND_RETRY_COUNT; i++)
 358     {
 359         if (-1 == bind(sock, (struct sockaddr *) &sockAddr, sizeof(sockAddr)))
 360         {
 361             if (false == forceBindStart)
 362             {
 363                 OIC_LOG_V(ERROR, IP_SERVER_TAG, "Failed to bind socket[%s]. Trying again..",
 364                           strerror(errno));
 365
 366                 //Set the port to next one
 367                 serverPort += 1;
 368                 sockAddr.sin_port = htons(serverPort);
 369                 continue;
 370             }
 371             else
 372             {
 373                 OIC_LOG_V(ERROR, IP_SERVER_TAG, "Failed to bind socket[%s]!",
 374                           strerror(errno));
 375                 break;
 376             }
 377         }
 378
 379         isBound = true;
 380         break;
 381     }
 382
 383     if (false == isBound)
 384     {
 385         close(sock);
 386         return CA_STATUS_FAILED;
 387     }
 388
 389     *port = serverPort;
 390     *socketFD = sock;
 391     return CA_STATUS_OK;
 392 }
 393
 394 static void CACloseSocket(int socketFD)
 395 {
 396     if (-1 == socketFD)
 397     {
 398         OIC_LOG(ERROR, IP_SERVER_TAG, "Invalid Socket Fd");
 399         return;
 400     }
 401
 402     // close the socket
 403     if (-1 == close(socketFD))
 404     {
 405         OIC_LOG_V(ERROR, IP_SERVER_TAG, "Failed to close the socket, Error code: %s\n",
 406                   strerror(errno));
 407     }
 408 }
 409
 410 static CAResult_t CAStartUnicastServer(const char *localAddress, uint16_t *port,
 411                                        bool forceBindStart, bool isSecured, int *serverFD)
 412 {
 413     OIC_LOG(DEBUG, IP_SERVER_TAG, "IN");
 414
 415     VERIFY_NON_NULL(serverFD, IP_SERVER_TAG, "serverFD");
 416     VERIFY_NON_NULL(localAddress, IP_SERVER_TAG, "localAddress");
 417     VERIFY_NON_NULL(port, IP_SERVER_TAG, "port");
 418
 419     CAResult_t ret = CACreateSocket(serverFD, localAddress, port, forceBindStart);
 420     if (CA_STATUS_OK != ret)
 421     {
 422         OIC_LOG(ERROR, IP_SERVER_TAG, "Failed to create unicast socket");
 423     }
 424
 425     OIC_LOG(DEBUG, IP_SERVER_TAG, "OUT");
 426     return ret;
 427 }
 428
 429 static CAResult_t CAIPStartPacketReceiverHandler()
 430 {
 431     OIC_LOG(DEBUG, IP_SERVER_TAG, "IN");
 432
 433     ca_mutex_lock(g_mutexServerInfoList);
 434
 435     uint32_t listLength = u_arraylist_length(g_serverInfoList);
 436
 437     ca_mutex_unlock(g_mutexServerInfoList);
 438
 439     ca_mutex_lock(g_mutexAdapterServerContext);
 440
 441     if (!g_adapterEthServerContext)
 442     {
 443         OIC_LOG(ERROR, IP_SERVER_TAG, "g_adapterEthServerContext NULL");
 444         ca_mutex_unlock(g_mutexAdapterServerContext);
 445         return CA_STATUS_FAILED;
 446     }
 447
 448     if (1 == listLength) //Its first time.
 449     {
 450         if (CA_STATUS_OK != ca_thread_pool_add_task(g_adapterEthServerContext->threadPool,
 451                                                    CAReceiveHandler, NULL ))
 452         {
 453             OIC_LOG(ERROR, IP_SERVER_TAG, "thread_pool_add_task failed!");
 454             ca_mutex_unlock(g_mutexAdapterServerContext);
 455             return CA_STATUS_FAILED;
 456         }
 457         OIC_LOG(DEBUG, IP_SERVER_TAG, "CAReceiveHandler thread started successfully.");
 458     }
 459     else
 460     {
 461         OIC_LOG(DEBUG, IP_SERVER_TAG, "CAReceiveHandler thread already is running");
 462     }
 463     ca_mutex_unlock(g_mutexAdapterServerContext);
 464
 465     OIC_LOG(DEBUG, IP_SERVER_TAG, "OUT");
 466
 467     return CA_STATUS_OK;
 468 }
 469
 470 static void CAIPServerDestroyMutex(void)
 471 {
 472     OIC_LOG(DEBUG, IP_SERVER_TAG, "IN");
 473
 474     if (g_mutexServerInfoList)
 475     {
 476         ca_mutex_free(g_mutexServerInfoList);
 477         g_mutexServerInfoList = NULL;
 478     }
 479
 480     if (g_mutexAdapterServerContext)
 481     {
 482         ca_mutex_free(g_mutexAdapterServerContext);
 483         g_mutexAdapterServerContext = NULL;
 484     }
 485
 486     OIC_LOG(DEBUG, IP_SERVER_TAG, "OUT");
 487 }
 488
 489 static CAResult_t CAIPServerCreateMutex(void)
 490 {
 491     OIC_LOG(DEBUG, IP_SERVER_TAG, "IN");
 492
 493     g_mutexServerInfoList = ca_mutex_new();
 494     if (!g_mutexServerInfoList)
 495     {
 496         OIC_LOG(DEBUG, IP_SERVER_TAG, "OUT");
 497         return CA_MEMORY_ALLOC_FAILED;
 498     }
 499
 500     g_mutexAdapterServerContext = ca_mutex_new();
 501     if (!g_mutexAdapterServerContext)
 502     {
 503         OIC_LOG(ERROR, IP_SERVER_TAG, "Failed to created mutex!");
 504         ca_mutex_free(g_mutexServerInfoList);
 505         g_mutexServerInfoList = NULL;
 506         return CA_MEMORY_ALLOC_FAILED;
 507     }
 508
 509     OIC_LOG(DEBUG, IP_SERVER_TAG, "OUT");
 510     return CA_STATUS_OK;
 511 }
 512
 513 CAResult_t CAIPInitializeServer(const ca_thread_pool_t threadPool)
 514 {
 515     OIC_LOG(DEBUG, IP_SERVER_TAG, "IN");
 516
 517     // Input validation
 518     VERIFY_NON_NULL(threadPool, IP_SERVER_TAG, "Thread pool handle is NULL");
 519
 520     // Initialize mutex
 521     if (CA_STATUS_OK != CAIPServerCreateMutex())
 522     {
 523         OIC_LOG(ERROR, IP_SERVER_TAG, "Failed to create mutex!");
 524         return CA_STATUS_FAILED;
 525     }
 526
 527     ca_mutex_lock(g_mutexAdapterServerContext);
 528     g_adapterEthServerContext = (CAAdapterIPServerContext_t *) OICCalloc(1,
 529                                  sizeof(CAAdapterIPServerContext_t));
 530
 531     if (!g_adapterEthServerContext)
 532     {
 533         OIC_LOG(ERROR, IP_SERVER_TAG, "Malloc failed");
 534         ca_mutex_unlock(g_mutexAdapterServerContext);
 535         return CA_MEMORY_ALLOC_FAILED;
 536     }
 537
 538     g_adapterEthServerContext->threadPool = threadPool;
 539
 540     ca_mutex_unlock(g_mutexAdapterServerContext);
 541
 542     ca_mutex_lock(g_mutexServerInfoList);
 543
 544     g_serverInfoList = u_arraylist_create();
 545     if (!g_serverInfoList)
 546     {
 547         OIC_LOG(ERROR, IP_SERVER_TAG, "u_arraylist_create failed");
 548         ca_mutex_unlock(g_mutexServerInfoList);
 549         return CA_MEMORY_ALLOC_FAILED;
 550     }
 551     ca_mutex_unlock(g_mutexServerInfoList);
 552     OIC_LOG(DEBUG, IP_SERVER_TAG, "OUT");
 553     return CA_STATUS_OK;
 554 }
 555
 556 void CAIPTerminateServer()
 557 {
 558     OIC_LOG(DEBUG, IP_SERVER_TAG, "IN");
 559     ca_mutex_lock(g_mutexAdapterServerContext);
 560     if (!g_adapterEthServerContext)
 561     {
 562         OIC_LOG(ERROR, IP_SERVER_TAG, "g_adapterEthServerContext NULL");
 563         ca_mutex_unlock(g_mutexAdapterServerContext);
 564         return;
 565     }
 566
 567     OICFree(g_adapterEthServerContext);
 568     g_adapterEthServerContext = NULL;
 569
 570     ca_mutex_unlock(g_mutexAdapterServerContext);
 571
 572     ca_mutex_lock(g_mutexServerInfoList);
 573
 574     CAClearServerInfoList(g_serverInfoList);
 575     g_serverInfoList = NULL;
 576
 577     ca_mutex_unlock(g_mutexServerInfoList);
 578     // Destroy mutex
 579     CAIPServerDestroyMutex();
 580
 581     OIC_LOG(DEBUG, IP_SERVER_TAG, "OUT");
 582
 583 }
 584
 585 CAResult_t CAIPStartUnicastServer(const char *localAddress, uint16_t *port,
 586                                         bool forceBindStart, bool isSecured)
 587 {
 588     OIC_LOG(DEBUG, IP_SERVER_TAG, "IN");
 589
 590     // Input validation
 591     VERIFY_NON_NULL(localAddress, IP_SERVER_TAG, "localAddress");
 592     VERIFY_NON_NULL(port, IP_SERVER_TAG, "port");
 593
 594     if (0 >= *port)
 595     {
 596         OIC_LOG(ERROR, IP_SERVER_TAG, "Invalid input: port is invalid!");
 597         return CA_STATUS_INVALID_PARAM;
 598     }
 599
 600     ca_mutex_lock(g_mutexServerInfoList);
 601     bool isUnicastServerStarted = CAIsUnicastServerStarted(g_serverInfoList, localAddress, *port);
 602     if (!isUnicastServerStarted)
 603     {
 604         int unicastServerFd = -1;
 605         if (CA_STATUS_OK != CAStartUnicastServer(localAddress, port, forceBindStart, isSecured,
 606                                                  &unicastServerFd))
 607         {
 608             OIC_LOG(ERROR, IP_SERVER_TAG, "Failed to start unicast server!");
 609             ca_mutex_unlock(g_mutexServerInfoList);
 610             return CA_STATUS_FAILED;
 611         }
 612
 613         CAServerInfo_t *info = (CAServerInfo_t *) OICCalloc(1, sizeof(CAServerInfo_t));
 614         if (!info)
 615         {
 616             OIC_LOG(ERROR, IP_SERVER_TAG, "Malloc failed");
 617             close(unicastServerFd);
 618             ca_mutex_unlock(g_mutexServerInfoList);
 619             return CA_MEMORY_ALLOC_FAILED;
 620         }
 621
 622         char *netMask = NULL;
 623         if (CA_STATUS_OK != CAIPGetInterfaceSubnetMask(localAddress, &netMask))
 624         {
 625             OIC_LOG(ERROR, IP_SERVER_TAG, "Failed to get IP subnet");
 626         }
 627         if (netMask)
 628         {
 629             strncpy(info->subNetMask, netMask, strlen(netMask));
 630             OICFree(netMask);
 631         }
 632         strncpy(info->ipAddress, localAddress, strlen(localAddress));
 633         info->port = *port;
 634         info->socketFd = unicastServerFd;
 635         info->isSecured = isSecured;
 636         info->isServerStarted = true;
 637         info->isMulticastServer = false;
 638         strncpy(info->ifAddr, localAddress, strlen(localAddress));
 639
 640         CAResult_t res = CAAddServerInfo(g_serverInfoList, info);
 641         if (CA_STATUS_OK != res)
 642         {
 643             OIC_LOG(ERROR, IP_SERVER_TAG, "CAAddServerInfo failed!");
 644             close(unicastServerFd);
 645             ca_mutex_unlock(g_mutexServerInfoList);
 646             return res;
 647         }
 648         ca_mutex_unlock(g_mutexServerInfoList);
 649
 650         res = CAIPStartPacketReceiverHandler();
 651         if (CA_STATUS_OK != res)
 652         {
 653             OIC_LOG(ERROR, IP_SERVER_TAG, "CAIPStartPacketReceiverHandler failed!");
 654             close(unicastServerFd);
 655             return res;
 656         }
 657     }
 658     else
 659     {
 660         OIC_LOG_V(DEBUG, IP_SERVER_TAG, "Already Unicast Server Started ip [%s] port [%d]",
 661                   localAddress, *port);
 662         ca_mutex_unlock(g_mutexServerInfoList);
 663     }
 664
 665     OIC_LOG(DEBUG, IP_SERVER_TAG, "OUT");
 666     return CA_STATUS_OK;
 667 }
 668
 669 CAResult_t CAIPStartMulticastServer(const char *localAddress, const char *multicastAddress,
 670                                           uint16_t multicastPort)
 671 {
 672     OIC_LOG(DEBUG, IP_SERVER_TAG, "IN");
 673
 674     // Input validation
 675     VERIFY_NON_NULL(localAddress, IP_SERVER_TAG, "localAddress");
 676     VERIFY_NON_NULL(multicastAddress, IP_SERVER_TAG, "port");
 677
 678     uint16_t port = multicastPort;
 679     if (0 >= port)
 680     {
 681         OIC_LOG(ERROR, IP_SERVER_TAG, "Invalid input: Multicast port is invalid!");
 682         return CA_STATUS_INVALID_PARAM;
 683     }
 684
 685     ca_mutex_lock(g_mutexServerInfoList);
 686     bool isMulticastServerStarted = CAIsMulticastServerStarted(g_serverInfoList, localAddress,
 687                                                                multicastAddress, port);
 688     if (!isMulticastServerStarted)
 689     {
 690         int mulicastServerFd = -1;
 691         CAResult_t ret = CACreateSocket(&mulicastServerFd, multicastAddress, &port, true);
 692         if (ret != CA_STATUS_OK)
 693         {
 694             OIC_LOG(ERROR, IP_SERVER_TAG, "Failed to create multicast socket");
 695             ca_mutex_unlock(g_mutexServerInfoList);
 696             return ret;
 697         }
 698
 699         struct ip_mreq multicastMemberReq = {.imr_interface.s_addr = inet_addr(localAddress)};
 700         inet_aton(multicastAddress, &multicastMemberReq.imr_multiaddr);
 701
 702         if (-1 == setsockopt(mulicastServerFd, IPPROTO_IP, IP_ADD_MEMBERSHIP,
 703                              (char *) &multicastMemberReq, sizeof(struct ip_mreq)))
 704         {
 705             OIC_LOG_V(ERROR, IP_SERVER_TAG,
 706                       "Failed to add to multicast group, Error code: %s\n", strerror(errno));
 707             close(mulicastServerFd);
 708             ca_mutex_unlock(g_mutexServerInfoList);
 709             return CA_STATUS_FAILED;
 710         }
 711
 712         CAServerInfo_t *info = (CAServerInfo_t *) OICCalloc(1, sizeof(CAServerInfo_t));
 713         if (!info)
 714         {
 715             OIC_LOG(ERROR, IP_SERVER_TAG, "Malloc failed");
 716             close(mulicastServerFd);
 717             ca_mutex_unlock(g_mutexServerInfoList);
 718             return CA_MEMORY_ALLOC_FAILED;
 719         }
 720
 721         char *netMask = NULL;
 722         if (CA_STATUS_OK != CAIPGetInterfaceSubnetMask(localAddress, &netMask))
 723         {
 724             OIC_LOG(ERROR, IP_SERVER_TAG, "Failed to get IP subnet");
 725         }
 726         if (netMask)
 727         {
 728             strncpy(info->subNetMask, netMask, strlen(netMask));
 729             OICFree(netMask);
 730         }
 731
 732         strncpy(info->ipAddress, multicastAddress, strlen(multicastAddress));
 733         info->port = multicastPort;
 734         info->socketFd = mulicastServerFd;
 735         info->isSecured = false;
 736         info->isServerStarted = true;
 737         info->isMulticastServer = true;
 738         strncpy(info->ifAddr, localAddress, strlen(localAddress));
 739
 740         ret = CAAddServerInfo(g_serverInfoList, info);
 741
 742         if (CA_STATUS_OK != ret)
 743         {
 744             OIC_LOG(ERROR, IP_SERVER_TAG, "CAAddServerInfo failed!");
 745             close(mulicastServerFd);
 746             ca_mutex_unlock(g_mutexServerInfoList);
 747             return ret;
 748         }
 749         ca_mutex_unlock(g_mutexServerInfoList);
 750
 751         ret = CAIPStartPacketReceiverHandler();
 752         if (CA_STATUS_OK != ret)
 753         {
 754             OIC_LOG(ERROR, IP_SERVER_TAG, "CAIPStartPacketReceiverHandler failed!");
 755             close(mulicastServerFd);
 756             return ret;
 757         }
 758     }
 759     else
 760     {
 761         OIC_LOG_V(DEBUG, IP_SERVER_TAG,
 762                   "Multicast Server is already started on interface addr[%s]", localAddress);
 763         ca_mutex_unlock(g_mutexServerInfoList);
 764     }
 765
 766     OIC_LOG(DEBUG, IP_SERVER_TAG, "OUT");
 767     return CA_STATUS_OK;
 768 }
 769
 770 CAResult_t CAIPStopServer(const char *interfaceAddress)
 771 {
 772     OIC_LOG(DEBUG, IP_SERVER_TAG, "IN");
 773
 774     VERIFY_NON_NULL(interfaceAddress, IP_SERVER_TAG, "interfaceAddress is NULL");
 775
 776     ca_mutex_lock(g_mutexServerInfoList);
 777     uint32_t listIndex = 0;
 778     uint32_t listLength = u_arraylist_length(g_serverInfoList);
 779
 780     for (listIndex = 0; listIndex < listLength;)
 781     {
 782         CAServerInfo_t *info = (CAServerInfo_t *) u_arraylist_get(g_serverInfoList, listIndex);
 783         if (!info)
 784         {
 785             listIndex++;
 786             continue;
 787         }
 788
 789         if (info->isMulticastServer && strncmp(interfaceAddress, info->ifAddr, strlen(info->ifAddr))
 790                 == 0)
 791         {
 792             if (u_arraylist_remove(g_serverInfoList, listIndex))
 793             {
 794                 struct ip_mreq multicastMemberReq = { { 0 }, { 0 } };
 795
 796                 multicastMemberReq.imr_interface.s_addr = inet_addr(info->ifAddr);
 797                 inet_aton(info->ipAddress, &multicastMemberReq.imr_multiaddr);
 798                 if (-1 == setsockopt(info->socketFd, IPPROTO_IP, IP_DROP_MEMBERSHIP,
 799                                      (char *) &multicastMemberReq, sizeof(struct ip_mreq)))
 800                 {
 801                     OIC_LOG_V(ERROR, IP_SERVER_TAG,
 802                               "Failed to leave multicast group, Error code: %s", strerror(errno));
 803                 }
 804                 CACloseSocket(info->socketFd);
 805                 OICFree(info);
 806                 OIC_LOG_V(DEBUG, IP_SERVER_TAG,
 807                           "Multicast server is stopped successfully on IF [%s]", info->ifAddr);
 808                 // Reduce list length by 1 as we removed one element.
 809                 listLength--;
 810             }
 811             else
 812             {
 813                 OIC_LOG(ERROR, IP_SERVER_TAG, "u_arraylist_remove failed.");
 814                 ca_mutex_unlock(g_mutexServerInfoList);
 815                 return CA_STATUS_FAILED;
 816             }
 817         }
 818         else if (strncmp(interfaceAddress, info->ipAddress, strlen(info->ipAddress)) == 0)
 819         {
 820             if (u_arraylist_remove(g_serverInfoList, listIndex))
 821             {
 822                 CACloseSocket(info->socketFd);
 823                 OICFree(info);
 824                 OIC_LOG_V(DEBUG, IP_SERVER_TAG,
 825                           "Unicast server is stopped successfully on IF [%s]", info->ifAddr);
 826                 // Reduce list length by 1 as we removed one element.
 827                 listLength--;
 828             }
 829             else
 830             {
 831                 OIC_LOG(ERROR, IP_SERVER_TAG, "u_arraylist_remove failed.");
 832                 ca_mutex_unlock(g_mutexServerInfoList);
 833                 return CA_STATUS_FAILED;
 834             }
 835         }
 836         else
 837         {
 838             listIndex++;
 839         }
 840     }
 841
 842     OIC_LOG(DEBUG, IP_SERVER_TAG, "OUT");
 843     ca_mutex_unlock(g_mutexServerInfoList);
 844     return CA_STATUS_OK;
 845 }
 846
 847 CAResult_t CAIPStopAllServers()
 848 {
 849     OIC_LOG(DEBUG, IP_SERVER_TAG, "IN");
 850
 851     g_packetHandlerStopFlag = true;
 852
 853     ca_mutex_lock(g_mutexServerInfoList);
 854
 855     uint32_t listIndex = 0;
 856     uint32_t listLength = u_arraylist_length(g_serverInfoList);
 857     for (listIndex = 0; listIndex < listLength;)
 858     {
 859         CAServerInfo_t *info = (CAServerInfo_t *) u_arraylist_get(g_serverInfoList, listIndex);
 860         if (!info)
 861         {
 862             listIndex++;
 863             continue;
 864         }
 865         if (u_arraylist_remove(g_serverInfoList, listIndex))
 866         {
 867             if (info->isMulticastServer)
 868             {
 869                 struct ip_mreq multicastMemberReq = { { 0 }, { 0 } };
 870
 871                 multicastMemberReq.imr_interface.s_addr = inet_addr(info->ifAddr);
 872                 inet_aton(info->ipAddress, &multicastMemberReq.imr_multiaddr);
 873                 if (-1 == setsockopt(info->socketFd, IPPROTO_IP, IP_DROP_MEMBERSHIP,
 874                                      (char *) &multicastMemberReq, sizeof(struct ip_mreq)))
 875                 {
 876                     OIC_LOG_V(ERROR, IP_SERVER_TAG,
 877                               "Failed to leave multicast group, Error code: %s", strerror(errno));
 878                 }
 879             }
 880             CACloseSocket(info->socketFd);
 881             //Freeing server info.
 882             OICFree(info);
 883             // Reduce list length by 1 as we removed one element.
 884             listLength--;
 885         }
 886         else
 887         {
 888             OIC_LOG(ERROR, IP_SERVER_TAG, "u_arraylist_remove failed.");
 889             ca_mutex_unlock(g_mutexServerInfoList);
 890             return CA_STATUS_FAILED;
 891         }
 892     }
 893
 894     ca_mutex_unlock(g_mutexServerInfoList);
 895
 896     OIC_LOG(DEBUG, IP_SERVER_TAG, "All Server stopped successfully. OUT");
 897     return CA_STATUS_OK;
 898 }
 899
 900 uint16_t CAGetServerPortNum(const char *ipAddress, bool isSecured)
 901 {
 902     ca_mutex_lock(g_mutexServerInfoList);
 903
 904     uint16_t port = CAGetServerPort(g_serverInfoList, ipAddress, isSecured);
 905
 906     ca_mutex_unlock(g_mutexServerInfoList);
 907
 908     return port;
 909 }
 910
 911 CAResult_t CAGetIPServerInfoList(u_arraylist_t **serverInfoList)
 912 {
 913     OIC_LOG(DEBUG, IP_SERVER_TAG, "IN");
 914     ca_mutex_lock(g_mutexServerInfoList);
 915
 916     uint32_t list_index = 0;
 917     uint32_t list_length = u_arraylist_length(g_serverInfoList);
 918     for (list_index = 0; list_index < list_length; list_index++)
 919     {
 920         CAServerInfo_t *info = (CAServerInfo_t *) u_arraylist_get(g_serverInfoList, list_index);
 921         if (!info)
 922         {
 923             continue;
 924         }
 925
 926         CAServerInfo_t *newNetinfo = (CAServerInfo_t *) OICMalloc(sizeof(CAServerInfo_t));
 927         if (!newNetinfo)
 928         {
 929             OIC_LOG(ERROR, IP_SERVER_TAG, "Malloc failed!");
 930             ca_mutex_unlock(g_mutexServerInfoList);
 931             return CA_MEMORY_ALLOC_FAILED;
 932         }
 933
 934         memcpy(newNetinfo, info, sizeof(*info));
 935
 936         CAResult_t result = u_arraylist_add(*serverInfoList, (void *) newNetinfo);
 937         if (CA_STATUS_OK != result)
 938         {
 939             OIC_LOG(ERROR, IP_SERVER_TAG, "u_arraylist_add failed!");
 940             ca_mutex_unlock(g_mutexServerInfoList);
 941             return CA_STATUS_FAILED;
 942         }
 943     }
 944     ca_mutex_unlock(g_mutexServerInfoList);
 945     OIC_LOG(DEBUG, IP_SERVER_TAG, "OUT");
 946     return CA_STATUS_OK;
 947 }
 948
 949 void CAIPSetPacketReceiveCallback(CAIPPacketReceivedCallback callback)
 950 {
 951     OIC_LOG(DEBUG, IP_SERVER_TAG, "IN");
 952
 953     ca_mutex_lock(g_mutexAdapterServerContext);
 954
 955     if (!g_adapterEthServerContext)
 956     {
 957         OIC_LOG(ERROR, IP_SERVER_TAG, "g_adapterEthServerContext NULL");
 958         ca_mutex_unlock(g_mutexAdapterServerContext);
 959         return;
 960     }
 961     g_adapterEthServerContext->packetReceivedCallback = callback;
 962
 963     ca_mutex_unlock(g_mutexAdapterServerContext);
 964
 965     OIC_LOG(DEBUG, IP_SERVER_TAG, "OUT");
 966 }
 967
 968 void CAIPSetExceptionCallback(CAIPExceptionCallback callback)
 969 {
 970     OIC_LOG(DEBUG, IP_SERVER_TAG, "IN");
 971     ca_mutex_lock(g_mutexAdapterServerContext);
 972
 973     if (!g_adapterEthServerContext)
 974     {
 975         OIC_LOG(ERROR, IP_SERVER_TAG, "g_adapterEthServerContext NULL");
 976         ca_mutex_unlock(g_mutexAdapterServerContext);
 977         return;
 978     }
 979     g_adapterEthServerContext->exceptionCallback = callback;
 980
 981     ca_mutex_unlock(g_mutexAdapterServerContext);
 982
 983     OIC_LOG(DEBUG, IP_SERVER_TAG, "OUT");
 984 }
 985