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 #include "oic_string.h"
  40
  41 /**
  42  * @def IP_SERVER_TAG
  43  * @brief Logging tag for module name
  44  */
  45 #define IP_SERVER_TAG "IP_SERVER"
  46
  47 /**
  48  * @def CA_UDP_BIND_RETRY_COUNT
  49  * @brief Retry count in case of socket bind failure.
  50  */
  51 #define CA_UDP_BIND_RETRY_COUNT 10
  52
  53 /**
  54  * @def IPNAMESIZE
  55  * @brief Max length for ip address.
  56  */
  57 #define IPNAMESIZE 16
  58
  59 /**
  60  * @def SOCKETOPTION
  61  * @brief Socket option.
  62  */
  63 #define SOCKETOPTION 1
  64
  65 /**
  66  * @var g_packetHandlerStopFlag
  67  * @brief Flag for stopping packet handler thread.
  68  */
  69 static bool g_packetHandlerStopFlag = false;
  70
  71 /**
  72  * @var CAAdapterIPServerContext_t
  73  * @brief Thread context information for callbacks and threadpool.
  74  */
  75 typedef struct
  76 {
  77     ca_thread_pool_t threadPool;
  78     CAIPPacketReceivedCallback packetReceivedCallback;
  79     CAIPExceptionCallback exceptionCallback;
  80 } CAAdapterIPServerContext_t;
  81
  82 /**
  83  * @var g_serverInfoList
  84  * @brief Mutex to synchronize ethenet adapter context.
  85  */
  86 static u_arraylist_t *g_serverInfoList = NULL;
  87
  88 /**
  89  * @var g_mutexServerInfoList
  90  * @brief Mutex to synchronize Server Information.
  91  */
  92 static ca_mutex g_mutexServerInfoList = NULL;
  93
  94 /**
  95  * @var g_adapterEthServerContext
  96  * @brief Mutex to synchronize ethenet adapter context.
  97  */
  98 static CAAdapterIPServerContext_t *g_adapterEthServerContext = NULL;
  99
 100 /**
 101  * @var g_mutexAdapterServerContext
 102  * @brief Mutex to synchronize unicast server
 103  */
 104 static ca_mutex g_mutexAdapterServerContext = NULL;
 105
 106 static void CAReceiveHandler(void *data)
 107 {
 108     OIC_LOG(DEBUG, IP_SERVER_TAG, "IN");
 109
 110     fd_set readFds;
 111     int maxSd = 0;
 112     struct timeval timeout;
 113     char recvBuffer[COAP_MAX_PDU_SIZE] = { 0 };
 114
 115     while (true != g_packetHandlerStopFlag)
 116     {
 117         timeout.tv_sec = 1;
 118         timeout.tv_usec = 0;
 119         FD_ZERO(&readFds);
 120
 121         ca_mutex_lock(g_mutexServerInfoList);
 122         uint32_t listIndex = 0;
 123         uint32_t listLength = u_arraylist_length(g_serverInfoList);
 124
 125         u_arraylist_t *tempServerInfoList = u_arraylist_create();
 126         if (!tempServerInfoList)
 127         {
 128             OIC_LOG(ERROR, IP_SERVER_TAG, "u_arraylist_create failed");
 129             ca_mutex_unlock(g_mutexServerInfoList);
 130             return;
 131         }
 132
 133         for (listIndex = 0; listIndex < listLength; listIndex++)
 134         {
 135             CAServerInfo_t *info = (CAServerInfo_t *) u_arraylist_get(g_serverInfoList, listIndex);
 136             if (!info)
 137             {
 138                 listIndex++;
 139                 continue;
 140             }
 141
 142             int sd = info->socketFd;
 143             //if valid socket descriptor then add to read list
 144             if (sd > 0)
 145             {
 146                 FD_SET(sd, &readFds);
 147             }
 148
 149             //highest file descriptor number, need it for the select function
 150             if (sd > maxSd)
 151             {
 152                 maxSd = sd;
 153             }
 154
 155             CAServerInfo_t *newInfo = (CAServerInfo_t *) OICMalloc(sizeof(CAServerInfo_t));
 156             if (!newInfo)
 157             {
 158                 OIC_LOG(ERROR, IP_SERVER_TAG, "Malloc failed");
 159                 CAClearServerInfoList(tempServerInfoList);
 160                 ca_mutex_unlock(g_mutexServerInfoList);
 161                 return;
 162             }
 163
 164             *newInfo = *info;
 165
 166             CAResult_t result = u_arraylist_add(tempServerInfoList, (void *) newInfo);
 167             if (CA_STATUS_OK != result)
 168             {
 169                 OIC_LOG(ERROR, IP_SERVER_TAG, "u_arraylist_add failed!Thread exit");
 170                 CAClearServerInfoList(tempServerInfoList);
 171                 ca_mutex_unlock(g_mutexServerInfoList);
 172                 return;
 173             }
 174         }
 175
 176         ca_mutex_unlock(g_mutexServerInfoList);
 177
 178         int ret = select(maxSd + 1, &readFds, NULL, NULL, &timeout);
 179         if (g_packetHandlerStopFlag)
 180         {
 181             OIC_LOG_V(DEBUG, IP_SERVER_TAG,
 182                       "Packet receiver handler Stop request received. Thread exited");
 183             CAClearServerInfoList(tempServerInfoList);
 184             break;
 185         }
 186         if (ret < 0)
 187         {
 188             OIC_LOG_V(FATAL, IP_SERVER_TAG, "select returned error %s", strerror(errno));
 189             CAClearServerInfoList(tempServerInfoList);
 190             continue;
 191         }
 192
 193         listLength = u_arraylist_length(tempServerInfoList);
 194         for (listIndex = 0; listIndex < listLength; listIndex++)
 195         {
 196             CAServerInfo_t *info = (CAServerInfo_t *) u_arraylist_get(tempServerInfoList,
 197                                                                       listIndex);
 198             if (!info)
 199             {
 200                 continue;
 201             }
 202
 203             int sd = info->socketFd;
 204             if (FD_ISSET(sd , &readFds))
 205             {
 206                 OIC_LOG_V(ERROR, IP_SERVER_TAG,
 207                           "data Received server information ip %s, port %d socket %d",
 208                           info->endpoint.addr, info->endpoint.port, sd);
 209                 memset(recvBuffer, 0, sizeof(recvBuffer));
 210
 211                 struct sockaddr_in srcSockAddress = { 0 };
 212                 socklen_t srcAddressLen = sizeof(srcSockAddress);
 213
 214                 //Reading from socket
 215                 ssize_t recvLen = recvfrom(sd, recvBuffer, sizeof(recvBuffer), 0,
 216                                            (struct sockaddr *) &srcSockAddress, &srcAddressLen);
 217                 if (-1 == recvLen)
 218                 {
 219                     OIC_LOG_V(ERROR, IP_SERVER_TAG, "Recvfrom failed %s", strerror(errno));
 220                     continue;
 221                 }
 222                 else if (0 == recvLen)
 223                 {
 224                     OIC_LOG_V(ERROR, IP_SERVER_TAG, "Server socket shutdown sock fd[%d]", sd);
 225                     ca_mutex_lock(g_mutexAdapterServerContext);
 226                     // Notify upper layer this exception
 227                     if (g_adapterEthServerContext->exceptionCallback)
 228                     {
 229                         // need to make proper exception callback.
 230                         //g_adapterEthServerContext->exceptionCallback(ctx->type);
 231                     }
 232                     ca_mutex_unlock(g_mutexAdapterServerContext);
 233                 }
 234
 235                 char srcIPAddress[CA_IPADDR_SIZE] = { 0 };
 236                 if (!inet_ntop(AF_INET, &srcSockAddress.sin_addr.s_addr, srcIPAddress,
 237                                sizeof(srcIPAddress)))
 238                 {
 239
 240                     OIC_LOG(ERROR, IP_SERVER_TAG, "inet_ntop is failed!");
 241                     continue;
 242                 }
 243
 244                 uint16_t srcPort = ntohs(srcSockAddress.sin_port);
 245
 246                 OIC_LOG_V(DEBUG, IP_SERVER_TAG, "Received packet from %s:%d len %d",
 247                           srcIPAddress, srcPort, recvLen);
 248
 249                 char *netMask = NULL;
 250                 if (CA_STATUS_OK != CAIPGetInterfaceSubnetMask(info->ifAddr, &netMask))
 251                 {
 252                     OIC_LOG(ERROR, IP_SERVER_TAG, "Failed to get IP subnet");
 253                     continue;
 254                 }
 255
 256                 if (!CAAdapterIsSameSubnet(info->ifAddr, srcIPAddress, netMask))
 257                 {
 258                     OIC_LOG(DEBUG, IP_SERVER_TAG,
 259                             "Packet received from different subnet, Ignore!");
 260                     OICFree(netMask);
 261                     continue;
 262                 }
 263                 OICFree(netMask);
 264
 265                 CAEndpoint_t ep;
 266                 strncpy(ep.addr, srcIPAddress, MAX_ADDR_STR_SIZE_CA);
 267                 ep.port = srcPort;
 268                 ep.flags = CA_IPV4;
 269                 ep.adapter = CA_ADAPTER_IP;
 270
 271                 if (info->endpoint.flags & CA_SECURE)
 272                 {
 273 #ifdef __WITH_DTLS__
 274                     ep.flags |= CA_SECURE;
 275                     (void)CAAdapterNetDtlsDecrypt(&ep, (uint8_t *)recvBuffer, recvLen);
 276                     OIC_LOG_V(DEBUG, IP_SERVER_TAG,
 277                               "CAAdapterNetDtlsDecrypt returns [%d]", ret);
 278 #endif
 279                 }
 280                 else //both multicast and unicast
 281                 {
 282                     ca_mutex_lock(g_mutexAdapterServerContext);
 283
 284                     if (g_adapterEthServerContext->packetReceivedCallback)
 285                     {
 286                         g_adapterEthServerContext->packetReceivedCallback(&ep,
 287                                                           recvBuffer, recvLen);
 288                     }
 289
 290                     ca_mutex_unlock(g_mutexAdapterServerContext);
 291                 }
 292             }
 293         }
 294         CAClearServerInfoList(tempServerInfoList);
 295     }
 296     OIC_LOG(DEBUG, IP_SERVER_TAG, "OUT");
 297 }
 298
 299 static CAResult_t CACreateSocket(int *socketFD, const char *localIp, uint16_t *port)
 300 {
 301     VERIFY_NON_NULL(socketFD, IP_SERVER_TAG, "socketFD is NULL");
 302     VERIFY_NON_NULL(localIp, IP_SERVER_TAG, "localIp is NULL");
 303     VERIFY_NON_NULL(port, IP_SERVER_TAG, "port is NULL");
 304     // Create a UDP socket
 305     int sock = -1;
 306
 307 #ifdef SOCK_CLOEXEC
 308     sock = socket(AF_INET, SOCK_DGRAM | SOCK_CLOEXEC, IPPROTO_UDP);
 309 #endif
 310
 311     if (-1 == sock)
 312     {
 313         sock = socket(AF_INET, SOCK_DGRAM, IPPROTO_UDP);
 314     }
 315
 316     if (-1 == sock)
 317     {
 318         OIC_LOG_V(ERROR, IP_SERVER_TAG, "Failed to create Socket, Error code: %s",
 319                   strerror(errno));
 320         return CA_STATUS_FAILED;
 321     }
 322
 323     // Make the socket non-blocking
 324     if (-1 == fcntl(sock, F_SETFL, O_NONBLOCK))
 325     {
 326         OIC_LOG_V(ERROR, IP_SERVER_TAG, "Failed to set non-block mode, Error code: %s",
 327                   strerror(errno));
 328
 329         close(sock);
 330         return CA_STATUS_FAILED;
 331     }
 332
 333     if (0 != *port)
 334     {
 335         int setOptionOn = SOCKETOPTION;
 336         if (-1 == setsockopt(sock, SOL_SOCKET, SO_REUSEADDR, (char *) &setOptionOn,
 337                              sizeof(setOptionOn)))
 338         {
 339             OIC_LOG_V(ERROR, IP_SERVER_TAG, "Failed to set SO_REUSEADDR! Error code: %s",
 340                       strerror(errno));
 341             close(sock);
 342             return CA_STATUS_FAILED;
 343         }
 344     }
 345
 346     struct sockaddr_in sockAddr = { 0 };
 347     uint16_t serverPort = *port;
 348     sockAddr.sin_family = AF_INET;
 349     sockAddr.sin_port = htons(serverPort);
 350     if (localIp)
 351     {
 352         sockAddr.sin_addr.s_addr = inet_addr(localIp);
 353     }
 354
 355     if (-1 != bind(sock, (struct sockaddr *) &sockAddr, sizeof(sockAddr)))
 356     {
 357         struct sockaddr_in sin;
 358         socklen_t len = sizeof(sin);
 359
 360         if (getsockname(sock, (struct sockaddr *)&sin, &len) == -1)
 361         {
 362             OIC_LOG_V(ERROR, IP_SERVER_TAG, "Failed to get socket[%s]!",
 363                       strerror(errno));
 364             close(sock);
 365             return CA_STATUS_FAILED;
 366         }
 367         else
 368         {
 369             serverPort = (uint16_t) ntohs(sin.sin_port);
 370         }
 371     }
 372     else
 373     {
 374         OIC_LOG_V(ERROR, IP_SERVER_TAG, "Failed to bind socket[%s]!",
 375                   strerror(errno));
 376         close(sock);
 377         return CA_STATUS_FAILED;
 378     }
 379
 380     *port = serverPort;
 381     *socketFD = sock;
 382     return CA_STATUS_OK;
 383 }
 384
 385 static void CACloseSocket(int socketFD)
 386 {
 387     if (-1 == socketFD)
 388     {
 389         OIC_LOG(ERROR, IP_SERVER_TAG, "Invalid Socket Fd");
 390         return;
 391     }
 392
 393     // close the socket
 394     if (-1 == close(socketFD))
 395     {
 396         OIC_LOG_V(ERROR, IP_SERVER_TAG, "Failed to close the socket, Error code: %s\n",
 397                   strerror(errno));
 398     }
 399 }
 400
 401 static CAResult_t CAStartUnicastServer(const char *localAddress, uint16_t *port,
 402                                        bool isSecured, int *serverFD)
 403 {
 404     OIC_LOG(DEBUG, IP_SERVER_TAG, "IN");
 405
 406     VERIFY_NON_NULL(serverFD, IP_SERVER_TAG, "serverFD");
 407     VERIFY_NON_NULL(localAddress, IP_SERVER_TAG, "localAddress");
 408     VERIFY_NON_NULL(port, IP_SERVER_TAG, "port");
 409
 410     CAResult_t ret = CACreateSocket(serverFD, localAddress, port);
 411     if (CA_STATUS_OK != ret)
 412     {
 413         OIC_LOG(ERROR, IP_SERVER_TAG, "Failed to create unicast socket");
 414     }
 415
 416     OIC_LOG(DEBUG, IP_SERVER_TAG, "OUT");
 417     return ret;
 418 }
 419
 420 static CAResult_t CAIPStartPacketReceiverHandler()
 421 {
 422     OIC_LOG(DEBUG, IP_SERVER_TAG, "IN");
 423
 424     ca_mutex_lock(g_mutexServerInfoList);
 425
 426     uint32_t listLength = u_arraylist_length(g_serverInfoList);
 427
 428     ca_mutex_unlock(g_mutexServerInfoList);
 429
 430     ca_mutex_lock(g_mutexAdapterServerContext);
 431
 432     if (!g_adapterEthServerContext)
 433     {
 434         OIC_LOG(ERROR, IP_SERVER_TAG, "g_adapterEthServerContext NULL");
 435         ca_mutex_unlock(g_mutexAdapterServerContext);
 436         return CA_STATUS_FAILED;
 437     }
 438
 439     if (1 == listLength) //Its first time.
 440     {
 441         g_packetHandlerStopFlag = false;
 442         if (CA_STATUS_OK != ca_thread_pool_add_task(g_adapterEthServerContext->threadPool,
 443                                                    CAReceiveHandler, NULL ))
 444         {
 445             OIC_LOG(ERROR, IP_SERVER_TAG, "thread_pool_add_task failed!");
 446             ca_mutex_unlock(g_mutexAdapterServerContext);
 447             return CA_STATUS_FAILED;
 448         }
 449         OIC_LOG(DEBUG, IP_SERVER_TAG, "CAReceiveHandler thread started successfully.");
 450     }
 451     else
 452     {
 453         OIC_LOG(DEBUG, IP_SERVER_TAG, "CAReceiveHandler thread already is running");
 454     }
 455     ca_mutex_unlock(g_mutexAdapterServerContext);
 456
 457     OIC_LOG(DEBUG, IP_SERVER_TAG, "OUT");
 458
 459     return CA_STATUS_OK;
 460 }
 461
 462 static void CAIPServerDestroyMutex(void)
 463 {
 464     OIC_LOG(DEBUG, IP_SERVER_TAG, "IN");
 465
 466     if (g_mutexServerInfoList)
 467     {
 468         ca_mutex_free(g_mutexServerInfoList);
 469         g_mutexServerInfoList = NULL;
 470     }
 471
 472     if (g_mutexAdapterServerContext)
 473     {
 474         ca_mutex_free(g_mutexAdapterServerContext);
 475         g_mutexAdapterServerContext = NULL;
 476     }
 477
 478     OIC_LOG(DEBUG, IP_SERVER_TAG, "OUT");
 479 }
 480
 481 static CAResult_t CAIPServerCreateMutex(void)
 482 {
 483     OIC_LOG(DEBUG, IP_SERVER_TAG, "IN");
 484
 485     g_mutexServerInfoList = ca_mutex_new();
 486     if (!g_mutexServerInfoList)
 487     {
 488         OIC_LOG(DEBUG, IP_SERVER_TAG, "OUT");
 489         return CA_MEMORY_ALLOC_FAILED;
 490     }
 491
 492     g_mutexAdapterServerContext = ca_mutex_new();
 493     if (!g_mutexAdapterServerContext)
 494     {
 495         OIC_LOG(ERROR, IP_SERVER_TAG, "Failed to created mutex!");
 496         ca_mutex_free(g_mutexServerInfoList);
 497         g_mutexServerInfoList = NULL;
 498         return CA_MEMORY_ALLOC_FAILED;
 499     }
 500
 501     OIC_LOG(DEBUG, IP_SERVER_TAG, "OUT");
 502     return CA_STATUS_OK;
 503 }
 504
 505 CAResult_t CAIPInitializeServer(const ca_thread_pool_t threadPool)
 506 {
 507     OIC_LOG(DEBUG, IP_SERVER_TAG, "IN");
 508
 509     // Input validation
 510     VERIFY_NON_NULL(threadPool, IP_SERVER_TAG, "Thread pool handle is NULL");
 511
 512     // Initialize mutex
 513     if (CA_STATUS_OK != CAIPServerCreateMutex())
 514     {
 515         OIC_LOG(ERROR, IP_SERVER_TAG, "Failed to create mutex!");
 516         return CA_STATUS_FAILED;
 517     }
 518
 519     ca_mutex_lock(g_mutexAdapterServerContext);
 520     g_adapterEthServerContext = (CAAdapterIPServerContext_t *) OICCalloc(1,
 521                                  sizeof(CAAdapterIPServerContext_t));
 522
 523     if (!g_adapterEthServerContext)
 524     {
 525         OIC_LOG(ERROR, IP_SERVER_TAG, "Malloc failed");
 526         ca_mutex_unlock(g_mutexAdapterServerContext);
 527         return CA_MEMORY_ALLOC_FAILED;
 528     }
 529
 530     g_adapterEthServerContext->threadPool = threadPool;
 531
 532     ca_mutex_unlock(g_mutexAdapterServerContext);
 533
 534     ca_mutex_lock(g_mutexServerInfoList);
 535
 536     g_serverInfoList = u_arraylist_create();
 537     if (!g_serverInfoList)
 538     {
 539         OIC_LOG(ERROR, IP_SERVER_TAG, "u_arraylist_create failed");
 540         ca_mutex_unlock(g_mutexServerInfoList);
 541         return CA_MEMORY_ALLOC_FAILED;
 542     }
 543     ca_mutex_unlock(g_mutexServerInfoList);
 544     OIC_LOG(DEBUG, IP_SERVER_TAG, "OUT");
 545     return CA_STATUS_OK;
 546 }
 547
 548 void CAIPTerminateServer()
 549 {
 550     OIC_LOG(DEBUG, IP_SERVER_TAG, "IN");
 551     ca_mutex_lock(g_mutexAdapterServerContext);
 552     if (!g_adapterEthServerContext)
 553     {
 554         OIC_LOG(ERROR, IP_SERVER_TAG, "g_adapterEthServerContext NULL");
 555         ca_mutex_unlock(g_mutexAdapterServerContext);
 556         return;
 557     }
 558
 559     OICFree(g_adapterEthServerContext);
 560     g_adapterEthServerContext = NULL;
 561
 562     ca_mutex_unlock(g_mutexAdapterServerContext);
 563
 564     ca_mutex_lock(g_mutexServerInfoList);
 565
 566     CAClearServerInfoList(g_serverInfoList);
 567     g_serverInfoList = NULL;
 568
 569     ca_mutex_unlock(g_mutexServerInfoList);
 570     // Destroy mutex
 571     CAIPServerDestroyMutex();
 572
 573     OIC_LOG(DEBUG, IP_SERVER_TAG, "OUT");
 574
 575 }
 576
 577 CAResult_t CAIPStartUnicastServer(const char *localAddress, uint16_t *port, bool isSecured)
 578 {
 579     OIC_LOG(DEBUG, IP_SERVER_TAG, "IN");
 580
 581     // Input validation
 582     VERIFY_NON_NULL(localAddress, IP_SERVER_TAG, "localAddress");
 583     VERIFY_NON_NULL(port, IP_SERVER_TAG, "port");
 584
 585     ca_mutex_lock(g_mutexServerInfoList);
 586     bool isUnicastServerStarted = CAIsUnicastServerStarted(g_serverInfoList, localAddress, *port);
 587     if (!isUnicastServerStarted)
 588     {
 589         int unicastServerFd = -1;
 590         if (CA_STATUS_OK != CAStartUnicastServer(localAddress, port, isSecured,
 591                                                  &unicastServerFd))
 592         {
 593             OIC_LOG(ERROR, IP_SERVER_TAG, "Failed to start unicast server!");
 594             ca_mutex_unlock(g_mutexServerInfoList);
 595             return CA_STATUS_FAILED;
 596         }
 597
 598         CAServerInfo_t *info = (CAServerInfo_t *) OICCalloc(1, sizeof(CAServerInfo_t));
 599         if (!info)
 600         {
 601             OIC_LOG(ERROR, IP_SERVER_TAG, "Malloc failed");
 602             close(unicastServerFd);
 603             ca_mutex_unlock(g_mutexServerInfoList);
 604             return CA_MEMORY_ALLOC_FAILED;
 605         }
 606
 607         char *netMask = NULL;
 608         if (CA_STATUS_OK != CAIPGetInterfaceSubnetMask(localAddress, &netMask))
 609         {
 610             OIC_LOG(ERROR, IP_SERVER_TAG, "Failed to get IP subnet");
 611         }
 612         if (netMask)
 613         {
 614             OICStrcpy(info->subNetMask, sizeof(info->subNetMask), netMask);
 615             OICFree(netMask);
 616         }
 617         OICStrcpy(info->endpoint.addr, sizeof(info->endpoint.addr), localAddress);
 618         info->endpoint.port = *port;
 619         info->endpoint.flags = isSecured ? CA_SECURE : 0;
 620         info->endpoint.adapter = CA_ADAPTER_IP;
 621         info->socketFd = unicastServerFd;
 622         info->isServerStarted = true;
 623         info->isMulticastServer = false;
 624         OICStrcpy(info->ifAddr, sizeof(info->ifAddr), localAddress);
 625
 626         CAResult_t res = CAAddServerInfo(g_serverInfoList, info);
 627         if (CA_STATUS_OK != res)
 628         {
 629             OIC_LOG(ERROR, IP_SERVER_TAG, "CAAddServerInfo failed!");
 630             close(unicastServerFd);
 631             ca_mutex_unlock(g_mutexServerInfoList);
 632             return res;
 633         }
 634         ca_mutex_unlock(g_mutexServerInfoList);
 635
 636         res = CAIPStartPacketReceiverHandler();
 637         if (CA_STATUS_OK != res)
 638         {
 639             OIC_LOG(ERROR, IP_SERVER_TAG, "CAIPStartPacketReceiverHandler failed!");
 640             close(unicastServerFd);
 641             return res;
 642         }
 643     }
 644     else
 645     {
 646         OIC_LOG_V(DEBUG, IP_SERVER_TAG, "Already Unicast Server Started ip [%s] port [%d]",
 647                   localAddress, *port);
 648         ca_mutex_unlock(g_mutexServerInfoList);
 649     }
 650
 651     OIC_LOG(DEBUG, IP_SERVER_TAG, "OUT");
 652     return CA_STATUS_OK;
 653 }
 654
 655 CAResult_t CAIPStartMulticastServer(const char *localAddress, const char *multicastAddress,
 656                                           uint16_t multicastPort)
 657 {
 658     OIC_LOG(DEBUG, IP_SERVER_TAG, "IN");
 659
 660     // Input validation
 661     VERIFY_NON_NULL(localAddress, IP_SERVER_TAG, "localAddress");
 662     VERIFY_NON_NULL(multicastAddress, IP_SERVER_TAG, "port");
 663
 664     uint16_t port = multicastPort;
 665     if (0 >= port)
 666     {
 667         OIC_LOG(ERROR, IP_SERVER_TAG, "Invalid input: Multicast port is invalid!");
 668         return CA_STATUS_INVALID_PARAM;
 669     }
 670
 671     ca_mutex_lock(g_mutexServerInfoList);
 672     bool isMulticastServerStarted = CAIsMulticastServerStarted(g_serverInfoList, localAddress,
 673                                                                multicastAddress, port);
 674     if (!isMulticastServerStarted)
 675     {
 676         int mulicastServerFd = -1;
 677         CAResult_t ret = CACreateSocket(&mulicastServerFd, multicastAddress, &port);
 678         if (ret != CA_STATUS_OK)
 679         {
 680             OIC_LOG(ERROR, IP_SERVER_TAG, "Failed to create multicast socket");
 681             ca_mutex_unlock(g_mutexServerInfoList);
 682             return ret;
 683         }
 684
 685         struct ip_mreq multicastMemberReq = {.imr_interface.s_addr = inet_addr(localAddress)};
 686         inet_aton(multicastAddress, &multicastMemberReq.imr_multiaddr);
 687
 688         if (-1 == setsockopt(mulicastServerFd, IPPROTO_IP, IP_ADD_MEMBERSHIP,
 689                              (char *) &multicastMemberReq, sizeof(struct ip_mreq)))
 690         {
 691             OIC_LOG_V(ERROR, IP_SERVER_TAG,
 692                       "Failed to add to multicast group, Error code: %s\n", strerror(errno));
 693             close(mulicastServerFd);
 694             ca_mutex_unlock(g_mutexServerInfoList);
 695             return CA_STATUS_FAILED;
 696         }
 697
 698         CAServerInfo_t *info = (CAServerInfo_t *) OICCalloc(1, sizeof(CAServerInfo_t));
 699         if (!info)
 700         {
 701             OIC_LOG(ERROR, IP_SERVER_TAG, "Malloc failed");
 702             close(mulicastServerFd);
 703             ca_mutex_unlock(g_mutexServerInfoList);
 704             return CA_MEMORY_ALLOC_FAILED;
 705         }
 706
 707         char *netMask = NULL;
 708         if (CA_STATUS_OK != CAIPGetInterfaceSubnetMask(localAddress, &netMask))
 709         {
 710             OIC_LOG(ERROR, IP_SERVER_TAG, "Failed to get IP subnet");
 711         }
 712         if (netMask)
 713         {
 714             OICStrcpy(info->subNetMask, sizeof(info->subNetMask), netMask);
 715             OICFree(netMask);
 716         }
 717
 718         OICStrcpy(info->endpoint.addr, sizeof(info->endpoint.addr), multicastAddress);
 719         info->endpoint.port = multicastPort;
 720         info->endpoint.flags = 0;
 721         info->socketFd = mulicastServerFd;
 722         info->isServerStarted = true;
 723         info->isMulticastServer = true;
 724         OICStrcpy(info->ifAddr, sizeof(info->ifAddr), localAddress);
 725
 726         ret = CAAddServerInfo(g_serverInfoList, info);
 727
 728         if (CA_STATUS_OK != ret)
 729         {
 730             OIC_LOG(ERROR, IP_SERVER_TAG, "CAAddServerInfo failed!");
 731             close(mulicastServerFd);
 732             ca_mutex_unlock(g_mutexServerInfoList);
 733             return ret;
 734         }
 735         ca_mutex_unlock(g_mutexServerInfoList);
 736
 737         ret = CAIPStartPacketReceiverHandler();
 738         if (CA_STATUS_OK != ret)
 739         {
 740             OIC_LOG(ERROR, IP_SERVER_TAG, "CAIPStartPacketReceiverHandler failed!");
 741             close(mulicastServerFd);
 742             return ret;
 743         }
 744     }
 745     else
 746     {
 747         OIC_LOG_V(DEBUG, IP_SERVER_TAG,
 748                   "Multicast Server is already started on interface addr[%s]", localAddress);
 749         ca_mutex_unlock(g_mutexServerInfoList);
 750     }
 751
 752     OIC_LOG(DEBUG, IP_SERVER_TAG, "OUT");
 753     return CA_STATUS_OK;
 754 }
 755
 756 CAResult_t CAIPStopServer(const char *interfaceAddress)
 757 {
 758     OIC_LOG(DEBUG, IP_SERVER_TAG, "IN");
 759
 760     VERIFY_NON_NULL(interfaceAddress, IP_SERVER_TAG, "interfaceAddress is NULL");
 761
 762     ca_mutex_lock(g_mutexServerInfoList);
 763     uint32_t listIndex = 0;
 764     uint32_t listLength = u_arraylist_length(g_serverInfoList);
 765
 766     for (listIndex = 0; listIndex < listLength;)
 767     {
 768         CAServerInfo_t *info = (CAServerInfo_t *) u_arraylist_get(g_serverInfoList, listIndex);
 769         if (!info)
 770         {
 771             listIndex++;
 772             continue;
 773         }
 774
 775         if (info->isMulticastServer && strncmp(interfaceAddress, info->ifAddr, strlen(info->ifAddr))
 776                 == 0)
 777         {
 778             if (u_arraylist_remove(g_serverInfoList, listIndex))
 779             {
 780                 struct ip_mreq multicastMemberReq = { { 0 }, { 0 } };
 781
 782                 multicastMemberReq.imr_interface.s_addr = inet_addr(info->ifAddr);
 783                 inet_aton(info->endpoint.addr, &multicastMemberReq.imr_multiaddr);
 784                 if (-1 == setsockopt(info->socketFd, IPPROTO_IP, IP_DROP_MEMBERSHIP,
 785                                      (char *) &multicastMemberReq, sizeof(struct ip_mreq)))
 786                 {
 787                     OIC_LOG_V(ERROR, IP_SERVER_TAG,
 788                               "Failed to leave multicast group, Error code: %s", strerror(errno));
 789                 }
 790                 CACloseSocket(info->socketFd);
 791                 OICFree(info);
 792                 OIC_LOG(DEBUG, IP_SERVER_TAG, "Multicast server is stopped successfully.");
 793                 // Reduce list length by 1 as we removed one element.
 794                 listLength--;
 795             }
 796             else
 797             {
 798                 OIC_LOG(ERROR, IP_SERVER_TAG, "u_arraylist_remove failed.");
 799                 ca_mutex_unlock(g_mutexServerInfoList);
 800                 return CA_STATUS_FAILED;
 801             }
 802         }
 803         else if (strncmp(interfaceAddress, info->endpoint.addr, strlen(info->endpoint.addr)) == 0)
 804         {
 805             if (u_arraylist_remove(g_serverInfoList, listIndex))
 806             {
 807                 CACloseSocket(info->socketFd);
 808                 OICFree(info);
 809                 OIC_LOG(DEBUG, IP_SERVER_TAG, "Unicast server is stopped successfully.");
 810                 // Reduce list length by 1 as we removed one element.
 811                 listLength--;
 812             }
 813             else
 814             {
 815                 OIC_LOG(ERROR, IP_SERVER_TAG, "u_arraylist_remove failed.");
 816                 ca_mutex_unlock(g_mutexServerInfoList);
 817                 return CA_STATUS_FAILED;
 818             }
 819         }
 820         else
 821         {
 822             listIndex++;
 823         }
 824     }
 825
 826     OIC_LOG(DEBUG, IP_SERVER_TAG, "OUT");
 827     ca_mutex_unlock(g_mutexServerInfoList);
 828     return CA_STATUS_OK;
 829 }
 830
 831 CAResult_t CAIPStopAllServers()
 832 {
 833     OIC_LOG(DEBUG, IP_SERVER_TAG, "IN");
 834
 835     g_packetHandlerStopFlag = true;
 836
 837     ca_mutex_lock(g_mutexServerInfoList);
 838
 839     uint32_t listIndex = 0;
 840     uint32_t listLength = u_arraylist_length(g_serverInfoList);
 841     for (listIndex = 0; listIndex < listLength;)
 842     {
 843         CAServerInfo_t *info = (CAServerInfo_t *) u_arraylist_get(g_serverInfoList, listIndex);
 844         if (!info)
 845         {
 846             listIndex++;
 847             continue;
 848         }
 849         if (u_arraylist_remove(g_serverInfoList, listIndex))
 850         {
 851             if (info->isMulticastServer)
 852             {
 853                 struct ip_mreq multicastMemberReq = { { 0 }, { 0 } };
 854
 855                 multicastMemberReq.imr_interface.s_addr = inet_addr(info->ifAddr);
 856                 inet_aton(info->endpoint.addr, &multicastMemberReq.imr_multiaddr);
 857                 if (-1 == setsockopt(info->socketFd, IPPROTO_IP, IP_DROP_MEMBERSHIP,
 858                                      (char *) &multicastMemberReq, sizeof(struct ip_mreq)))
 859                 {
 860                     OIC_LOG_V(ERROR, IP_SERVER_TAG,
 861                               "Failed to leave multicast group, Error code: %s", strerror(errno));
 862                 }
 863             }
 864             CACloseSocket(info->socketFd);
 865             //Freeing server info.
 866             OICFree(info);
 867             // Reduce list length by 1 as we removed one element.
 868             listLength--;
 869         }
 870         else
 871         {
 872             OIC_LOG(ERROR, IP_SERVER_TAG, "u_arraylist_remove failed.");
 873             ca_mutex_unlock(g_mutexServerInfoList);
 874             return CA_STATUS_FAILED;
 875         }
 876     }
 877
 878     ca_mutex_unlock(g_mutexServerInfoList);
 879
 880     OIC_LOG(DEBUG, IP_SERVER_TAG, "All Server stopped successfully. OUT");
 881     return CA_STATUS_OK;
 882 }
 883
 884 uint16_t CAGetServerPortNum(const char *ipAddress, bool isSecured)
 885 {
 886     ca_mutex_lock(g_mutexServerInfoList);
 887
 888     uint16_t port = CAGetServerPort(g_serverInfoList, ipAddress, isSecured);
 889
 890     ca_mutex_unlock(g_mutexServerInfoList);
 891
 892     return port;
 893 }
 894
 895 CAResult_t CAGetIPServerInfoList(u_arraylist_t **serverInfoList)
 896 {
 897     OIC_LOG(DEBUG, IP_SERVER_TAG, "IN");
 898     ca_mutex_lock(g_mutexServerInfoList);
 899
 900     uint32_t list_index = 0;
 901     uint32_t list_length = u_arraylist_length(g_serverInfoList);
 902     for (list_index = 0; list_index < list_length; list_index++)
 903     {
 904         CAServerInfo_t *info = (CAServerInfo_t *) u_arraylist_get(g_serverInfoList, list_index);
 905         if (!info)
 906         {
 907             continue;
 908         }
 909
 910         CAServerInfo_t *newNetinfo = (CAServerInfo_t *) OICMalloc(sizeof(CAServerInfo_t));
 911         if (!newNetinfo)
 912         {
 913             OIC_LOG(ERROR, IP_SERVER_TAG, "Malloc failed!");
 914             ca_mutex_unlock(g_mutexServerInfoList);
 915             return CA_MEMORY_ALLOC_FAILED;
 916         }
 917
 918         *newNetinfo = *info;
 919
 920         CAResult_t result = u_arraylist_add(*serverInfoList, (void *) newNetinfo);
 921         if (CA_STATUS_OK != result)
 922         {
 923             OIC_LOG(ERROR, IP_SERVER_TAG, "u_arraylist_add failed!");
 924             ca_mutex_unlock(g_mutexServerInfoList);
 925             return CA_STATUS_FAILED;
 926         }
 927     }
 928     ca_mutex_unlock(g_mutexServerInfoList);
 929     OIC_LOG(DEBUG, IP_SERVER_TAG, "OUT");
 930     return CA_STATUS_OK;
 931 }
 932
 933 void CAIPSetPacketReceiveCallback(CAIPPacketReceivedCallback callback)
 934 {
 935     OIC_LOG(DEBUG, IP_SERVER_TAG, "IN");
 936
 937     ca_mutex_lock(g_mutexAdapterServerContext);
 938
 939     if (!g_adapterEthServerContext)
 940     {
 941         OIC_LOG(ERROR, IP_SERVER_TAG, "g_adapterEthServerContext NULL");
 942         ca_mutex_unlock(g_mutexAdapterServerContext);
 943         return;
 944     }
 945     g_adapterEthServerContext->packetReceivedCallback = callback;
 946
 947     ca_mutex_unlock(g_mutexAdapterServerContext);
 948
 949     OIC_LOG(DEBUG, IP_SERVER_TAG, "OUT");
 950 }
 951
 952 void CAIPSetExceptionCallback(CAIPExceptionCallback callback)
 953 {
 954     OIC_LOG(DEBUG, IP_SERVER_TAG, "IN");
 955     ca_mutex_lock(g_mutexAdapterServerContext);
 956
 957     if (!g_adapterEthServerContext)
 958     {
 959         OIC_LOG(ERROR, IP_SERVER_TAG, "g_adapterEthServerContext NULL");
 960         ca_mutex_unlock(g_mutexAdapterServerContext);
 961         return;
 962     }
 963     g_adapterEthServerContext->exceptionCallback = callback;
 964
 965     ca_mutex_unlock(g_mutexAdapterServerContext);
 966
 967     OIC_LOG(DEBUG, IP_SERVER_TAG, "OUT");
 968 }
 969