src/IpcServer.cpp

   1 //
   2 // Open Service Platform
   3 // Copyright (c) 2012 Samsung Electronics Co., Ltd.
   4 //
   5 // Licensed under the Apache License, Version 2.0 (the License);
   6 // you may not use this file except in compliance with the License.
   7 // You may obtain a copy of the License at
   8 //
   9 //     http://www.apache.org/licenses/LICENSE-2.0
  10 //
  11 // Unless required by applicable law or agreed to in writing, software
  12 // distributed under the License is distributed on an "AS IS" BASIS,
  13 // WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
  14 // See the License for the specific language governing permissions and
  15 // limitations under the License.
  16 //
  17
  18 /**
  19  * @file  FIo_IpcServer.cpp
  20  * @brief This is the implementation file for the IpcServer class.
  21  *
  22  */
  23
  24 #include <cstdio>
  25 #include <cstdlib>
  26 #include <cstring>
  27 #include <cerrno>
  28 #include <iostream>
  29 #include <new>
  30
  31 #include <unistd.h>
  32 #include <sys/types.h>
  33 #include <sys/socket.h>
  34 #include <sys/stat.h>
  35 #include <sys/un.h>
  36
  37 #include <sys/smack.h>
  38
  39 #include <ipc/ipc_message.h>
  40
  41 #include <app_manager.h>
  42
  43 #include <FBaseRtMutex.h>
  44 #include <FBaseSysLog.h>
  45 #include <FBase_StringConverter.h>
  46 #include <FBaseRt_EventDispatcher.h>
  47
  48 #include "IIpcServerEventListener.h"
  49 #include "IpcServer.h"
  50
  51 using namespace std;
  52 using namespace IPC;
  53
  54 using namespace Tizen::Base;
  55 using namespace Tizen::Base::Runtime;
  56 using namespace Tizen::App;
  57
  58 IpcServer::_ChannelInfo::_ChannelInfo(void)
  59         : pClientInfo(null)
  60         , pGIOChannel(null)
  61         , pGSource(null)
  62         , destroySource(true)
  63 {
  64
  65 }
  66
  67 IpcServer::_ChannelInfo::~_ChannelInfo(void)
  68 {
  69         if (pGIOChannel != null)
  70         {
  71                 g_io_channel_unref(pGIOChannel);
  72         }
  73
  74         if (pGSource != null)
  75         {
  76                 if (destroySource)
  77                 {
  78                         g_source_destroy(pGSource);
  79                 }
  80
  81                 g_source_unref(pGSource);
  82         }
  83 }
  84
  85 IpcServer::_ClientInfo::_ClientInfo(void)
  86         : clientId(-1)
  87         , pIpcServer(null)
  88         , pReverseChannel(null)
  89 {
  90
  91 }
  92
  93 IpcServer::_ClientInfo::~_ClientInfo(void)
  94 {
  95         if (pReverseChannel != null)
  96         {
  97                 g_io_channel_unref(pReverseChannel);
  98         }
  99
 100         channels.clear();
 101 }
 102
 103 IpcServer::IpcServer(void)
 104         : __runOnCallerThread(false)
 105         , __pEventDispatcher(null)
 106         , __pListener(null)
 107         , __handlerThread(0)
 108         , __pHandlerGMainContext(null)
 109         , __pHandlerGMainLoop(null)
 110         , __pConnectGSource(null)
 111         , __pCurrentChannel(null)
 112         , __pCurrentClientInfo(null)
 113 {
 114         __messageBuffer[0] = '\0';
 115 }
 116
 117
 118 IpcServer::~IpcServer(void)
 119 {
 120         if (__pConnectGSource != null)
 121         {
 122                 g_source_destroy(__pConnectGSource);
 123                 g_source_unref(__pConnectGSource);
 124                 __pConnectGSource = null;
 125         }
 126
 127         if (!__runOnCallerThread)
 128         {
 129                 if (__pEventDispatcher)
 130                 {
 131                         delete __pEventDispatcher;
 132                         __pEventDispatcher = null;
 133                 }
 134
 135                 if (__pHandlerGMainLoop)
 136                 {
 137                         g_main_loop_unref(__pHandlerGMainLoop);
 138                         __pHandlerGMainLoop = null;
 139                 }
 140
 141                 if (__pHandlerGMainContext)
 142                 {
 143                         g_main_context_unref(__pHandlerGMainContext);
 144                         __pHandlerGMainContext = null;
 145                 }
 146         }
 147
 148         // clean-up clients
 149         __clients.clear();
 150 }
 151
 152 result
 153 IpcServer::Construct(const String& name, const IIpcServerEventListener& listener, bool runOnCallerThread)
 154 {
 155         result r = E_SUCCESS;
 156
 157         GIOChannel* pGIOChannel = null;
 158         GSource* pGSource = null;
 159
 160         struct sockaddr_un serverAddress;
 161         int serverSocket = -1;
 162         int serverLen = 0;
 163         int ret = 0;
 164         std::string socketName;
 165         char* pName = null;
 166         size_t socketNameLength = 0;
 167
 168         __name = name;
 169         __pListener = const_cast <IIpcServerEventListener*>(&listener);
 170         __runOnCallerThread = runOnCallerThread;
 171
 172         pName = _StringConverter::CopyToCharArrayN(name);
 173         SysTryReturnResult(NID_IO, pName != null, E_OUT_OF_MEMORY, "Not enough memory");
 174
 175         socketName.append("/tmp/");
 176         socketName.append(pName);
 177
 178         delete[] pName;
 179
 180         socketNameLength = socketName.size() + 1;
 181         SysTryReturnResult(NID_IO, socketNameLength < 108, E_INVALID_ARG, "Server name is too long");
 182
 183         if (!__runOnCallerThread)
 184         {
 185                 __pHandlerGMainContext = g_main_context_new();
 186                 __pHandlerGMainLoop = g_main_loop_new(__pHandlerGMainContext, FALSE);
 187
 188         }
 189         else
 190         {
 191                 __pHandlerGMainContext = g_main_context_get_thread_default();
 192                 if (__pHandlerGMainContext == null) // is global?
 193                 {
 194                         __pHandlerGMainContext = g_main_context_default();
 195                         if (__pHandlerGMainContext == null)
 196                         {
 197                                 return E_SYSTEM;
 198                         }
 199                 }
 200         }
 201
 202         ret = unlink(socketName.c_str());
 203         SysTryLog(NID_IO, ret == 0, "Unlink a socket has failed.. but it is not a problem.");
 204
 205         serverSocket = socket(AF_UNIX, SOCK_STREAM, 0);
 206         SysTryReturnResult(NID_IO, serverSocket != -1, E_SYSTEM, "Failed to create a socket.");
 207
 208         // SMACK (Add a * label to socket)
 209         if(smack_fsetlabel(serverSocket, "@", SMACK_LABEL_IPOUT) != 0)
 210         {
 211                 SysTryCatch(NID_IO, errno == EOPNOTSUPP, r = E_SYSTEM, E_SYSTEM, "[E_SYSTEM] SMACK labeling failed");
 212                 SysLog(NID_IO, "Kernel doesn't have Smack.");
 213         }
 214
 215         if(smack_fsetlabel(serverSocket, "*", SMACK_LABEL_IPIN) != 0)
 216         {
 217                 SysTryCatch(NID_IO, errno == EOPNOTSUPP, r = E_SYSTEM, E_SYSTEM, "[E_SYSTEM] SMACK labeling failed");
 218                 SysLog(NID_IO, "Kernel doesn't have Smack.");
 219         }
 220
 221         bzero(&serverAddress, sizeof(serverAddress));
 222         serverAddress.sun_family = AF_UNIX;
 223         strncpy(serverAddress.sun_path, socketName.c_str(), socketNameLength);
 224         serverLen = sizeof(serverAddress);
 225
 226         ret = bind(serverSocket, (const struct sockaddr*) &serverAddress, serverLen);
 227         SysTryCatch(NID_IO, ret != -1, r = E_SYSTEM, E_SYSTEM, "[E_SYSTEM] Failed to bind a socket(%d, %s): %s", serverSocket,
 228                            socketName.c_str(), strerror(errno));
 229
 230         ret = chmod(socketName.c_str(), 0666);
 231         SysTryCatch(NID_IO, ret == 0, r = E_SYSTEM, E_SYSTEM, "[E_SYSTEM] Failed to change permission of a socket(%d, %s): %s", serverSocket,
 232                            socketName.c_str(), strerror(errno));
 233
 234         ret = listen(serverSocket, 128);
 235         SysTryCatch(NID_IO, ret == 0, r = E_SYSTEM, E_SYSTEM, "[E_SYSTEM] Failed to listen a socket(%d, %s): %s", serverSocket,
 236                            socketName.c_str(), strerror(errno));
 237
 238         pGIOChannel = g_io_channel_unix_new(serverSocket);
 239         SysTryCatch(NID_IO, pGIOChannel != null, , E_OUT_OF_MEMORY, "[E_OUT_OF_MEMORY] Not enough memory.");
 240
 241         // socket will be closed when pGIOChannel is deleted.
 242         g_io_channel_set_close_on_unref(pGIOChannel, TRUE);
 243         serverSocket = -1;
 244
 245         pGSource = g_io_create_watch(pGIOChannel, (GIOCondition) (G_IO_IN | G_IO_ERR | G_IO_NVAL | G_IO_HUP));
 246         SysTryCatch(NID_IO, pGSource != null, r = E_OUT_OF_MEMORY, E_OUT_OF_MEMORY,
 247                            "[E_OUT_OF_MEMORY] Failed to create watch for socket.");
 248
 249         // channel will be delete when pGSource is deleted.
 250         g_io_channel_unref(pGIOChannel);
 251         pGIOChannel = null;
 252
 253         g_source_set_callback(pGSource, (GSourceFunc) OnConnectionRequest, this, NULL);
 254         g_source_attach(pGSource, __pHandlerGMainContext);
 255
 256         if (__runOnCallerThread)
 257         {
 258                 __pListener->OnIpcServerStarted(*this);
 259         }
 260         else
 261         {
 262                 ret = pthread_create(&__handlerThread, null, &ThreadProc, (void*) this);
 263                 SysTryCatch(NID_IO, ret == 0, r = E_SYSTEM, E_SYSTEM, "[E_SYSTEM] Failed to an IPC thread");
 264         }
 265
 266         __pConnectGSource = pGSource;
 267
 268         return E_SUCCESS;
 269
 270 CATCH:
 271         if (pGIOChannel != null)
 272         {
 273                 g_io_channel_unref(pGIOChannel);
 274         }
 275
 276         if (serverSocket != -1)
 277         {
 278                 close(serverSocket);
 279         }
 280
 281         if (runOnCallerThread && __pHandlerGMainContext)
 282         {
 283                 g_main_context_unref(__pHandlerGMainContext);
 284                 __pHandlerGMainContext = null;
 285         }
 286
 287         return r;
 288 }
 289
 290 struct HelloMessage
 291 {
 292         int pid;
 293         int reverse;  // if the connection is for reverse message
 294 };
 295
 296 gboolean
 297 IpcServer::OnConnectionRequest(GIOChannel* source, GIOCondition condition, gpointer data)
 298 {
 299         IpcServer* pIpcServer = (IpcServer*) data;
 300         GError* pGError = null;
 301         HelloMessage helloMessage;
 302         _ClientInfo* pClientInfo = null;
 303         _ChannelInfo* pChannelInfo = null;
 304         GSource* pGSource = null;
 305         GIOChannel* pChannel = null;
 306         ssize_t readBytes = 0;
 307
 308         int server = -1;
 309         int client = -1;
 310         struct sockaddr_un clientAddress;
 311         socklen_t clientLen = sizeof(clientAddress);
 312
 313         SysAssertf(pIpcServer != null, "Not yet constructed. Construct() should be called before use.\n");
 314         SysAssertf(pIpcServer->__pListener != null, "Listener is null.\n");
 315
 316         server = g_io_channel_unix_get_fd(source);
 317
 318         client = accept(server, (struct sockaddr*) &clientAddress, &clientLen);
 319         SysTryCatch(NID_IO, client != -1, , E_SYSTEM, "[E_SYSTEM] Accept failed.");
 320
 321         readBytes = read(client, &helloMessage, sizeof(helloMessage));
 322         SysTryCatch(NID_IO, readBytes >= 0, , E_SYSTEM, "[E_SYSTEM] Failed to receive hello message (%d, %s).",
 323                         errno, strerror(errno));
 324
 325         pChannel = g_io_channel_unix_new(client);
 326         SysTryCatch(NID_IO, pChannel != null, , E_OUT_OF_MEMORY, "[E_OUT_OF_MEMORY] Not enough memory.");
 327
 328         g_io_channel_set_encoding(pChannel, NULL, &pGError);
 329         g_io_channel_set_flags(pChannel, G_IO_FLAG_NONBLOCK, &pGError);
 330
 331         g_io_channel_set_close_on_unref(pChannel, TRUE);
 332         client = -1;
 333
 334         pClientInfo = pIpcServer->__clients[helloMessage.pid];
 335         if (pClientInfo == null) // first connection request from this client
 336         {
 337                 pClientInfo = new (std::nothrow) _ClientInfo;
 338                 SysTryCatch(NID_IO, pClientInfo != null, , E_OUT_OF_MEMORY, "[E_OUT_OF_MEMORY] Not enough memory.");
 339
 340                 pClientInfo->pIpcServer = pIpcServer;
 341                 pClientInfo->clientId = helloMessage.pid;
 342
 343                 char* pAppId = NULL;
 344                 int ret = app_manager_get_app_id(helloMessage.pid, &pAppId);
 345                 SysTryCatch(NID_IO, ret >= 0, delete pClientInfo, E_SYSTEM, "[E_SYSTEM] Failed to get_app_id: %d", ret);
 346
 347                 pClientInfo->appId = pAppId;
 348                 free(pAppId);
 349
 350                 pClientInfo->pReverseChannel = null;
 351
 352                 pIpcServer->__clients[helloMessage.pid] = pClientInfo;
 353                 pIpcServer->__pCurrentClientInfo = pClientInfo;
 354                 pIpcServer->__pListener->OnIpcClientConnected(*pIpcServer, helloMessage.pid);
 355                 pIpcServer->__pCurrentClientInfo = null;
 356         }
 357
 358         if (helloMessage.reverse != 0)
 359         {
 360                 pClientInfo->pReverseChannel = pChannel;
 361         }
 362         else
 363         {
 364                 pChannelInfo = new (std::nothrow) _ChannelInfo;
 365                 SysTryCatch(NID_IO, pChannelInfo != null, , E_OUT_OF_MEMORY, "[E_OUT_OF_MEMORY] Not enough memory.");
 366
 367                 pGSource = g_io_create_watch(pChannel, (GIOCondition) (G_IO_IN | G_IO_ERR | G_IO_NVAL | G_IO_HUP));
 368                 g_source_set_callback(pGSource, (GSourceFunc) OnReadMessage, pChannelInfo, NULL);
 369                 g_source_attach(pGSource, pIpcServer->__pHandlerGMainContext);
 370
 371                 pChannelInfo->pClientInfo = pClientInfo;
 372                 pChannelInfo->pGIOChannel = pChannel;
 373                 pChannelInfo->pGSource = pGSource;
 374
 375                 pClientInfo->channels.push_back(pChannelInfo);
 376         }
 377
 378         return true;
 379
 380 CATCH:
 381         if (pChannel != null)
 382         {
 383                 g_io_channel_unref(pChannel);
 384         }
 385
 386         if (client != -1)
 387         {
 388                 close(client);
 389         }
 390
 391         return true;
 392 }
 393
 394 int
 395 IpcServer::GetClientId(void) const
 396 {
 397         if (__pCurrentClientInfo)
 398         {
 399                 return __pCurrentClientInfo->clientId;
 400         }
 401
 402         return -1;
 403 }
 404
 405 AppId
 406 IpcServer::GetClientApplicationId(void) const
 407 {
 408         static String nullString;
 409
 410         if (__pCurrentClientInfo)
 411         {
 412                 return __pCurrentClientInfo->appId;
 413         }
 414
 415         return nullString;
 416 }
 417
 418 gboolean
 419 IpcServer::HandleReceivedMessage(GIOChannel* source, GIOCondition condition, gpointer data)
 420 {
 421         GError* pGError = NULL;
 422         GIOStatus status;
 423         IPC::Message* pMessage = NULL;
 424         _ChannelInfo* pChannelInfo = (_ChannelInfo*) data;
 425         _ClientInfo* pClientInfo = pChannelInfo->pClientInfo;
 426
 427         if (condition & G_IO_HUP)
 428         {
 429                 SysLog(NID_IO, "Connection closed");
 430                 int clientId = pClientInfo->clientId;
 431
 432                 g_io_channel_shutdown(source, FALSE, &pGError);
 433
 434                 for (unsigned int i = 0; i < pClientInfo->channels.size(); i++)
 435                 {
 436                         if (pChannelInfo == pClientInfo->channels[i])
 437                         {
 438                                 pClientInfo->channels.erase(pClientInfo->channels.begin() + i);
 439
 440                                 // Do not destroy a source in a dispatch callback
 441                                 // because main loop will do it if the callback return FALSE.
 442                                 pChannelInfo->destroySource = false;
 443                                 delete pChannelInfo;
 444
 445                                 break;
 446                         }
 447                 }
 448
 449                 if (pClientInfo->channels.size() == 0)
 450                 {
 451                         SysLog(NID_IO, "All connections of client(%d) are closed. delete client info", clientId);
 452
 453                         __pListener->OnIpcClientDisconnected(*this, clientId);
 454
 455                         __clients[clientId] = null;
 456
 457                         delete pClientInfo;
 458                 }
 459
 460                 return FALSE;
 461         }
 462         else if (condition & G_IO_IN)
 463         {
 464                 gsize readSize = 0;
 465                 const char* pStart = NULL;
 466                 const char* pEnd = NULL;
 467                 const char* pEndOfMessage = NULL;
 468
 469                 while (true)
 470                 {
 471                         pGError = null;
 472                         status = g_io_channel_read_chars(source, (char*) __messageBuffer, __MAX_MESSAGE_BUFFER_SIZE, &readSize, &pGError);
 473                         if (status != G_IO_STATUS_NORMAL)
 474                         {
 475                                 if (status == G_IO_STATUS_EOF || status == G_IO_STATUS_ERROR)
 476                                 {
 477                                         if (status == G_IO_STATUS_EOF)
 478                                         {
 479                                                 SysLog(NID_IO, "G_IO_STATUS_EOF, the connection is closed.");
 480                                         }
 481                                         else
 482                                         {
 483                                                 SysLog(NID_IO, "G_IO_STATUS_ERROR, the connection is closed. ");
 484                                         }
 485
 486                                         pGError = null;
 487                                         g_io_channel_shutdown(source, FALSE, &pGError);
 488
 489                                         int clientId = pClientInfo->clientId;
 490
 491                                         for (unsigned int i = 0; i < pClientInfo->channels.size(); i++)
 492                                         {
 493                                                 if (pChannelInfo == pClientInfo->channels[i])
 494                                                 {
 495                                                         pClientInfo->channels.erase(pClientInfo->channels.begin() + i);
 496
 497                                                         pChannelInfo->destroySource = false;
 498                                                         delete pChannelInfo;
 499                                                         break;
 500                                                 }
 501                                         }
 502
 503                                         if (pClientInfo->channels.size() == 0)
 504                                         {
 505                                                 SysLog(NID_IO, "All connections of client(%d) are closed normally by the client.", clientId);
 506
 507                                                 if (__pListener)
 508                                                 {
 509                                                         __pListener->OnIpcClientDisconnected(*this, clientId);
 510                                                 }
 511
 512                                                 __clients[clientId] = null;
 513
 514                                                 delete pClientInfo;
 515                                         }
 516
 517                                         return FALSE;
 518                                 }
 519                         }
 520
 521                         if (readSize == 0)
 522                         {
 523                                 break;
 524                         }
 525
 526                         if (__pending.empty())
 527                         {
 528                                 pStart = __messageBuffer;
 529                                 pEnd = pStart + readSize;
 530                         }
 531                         else
 532                         {
 533                                 __pending.append(__messageBuffer, readSize);
 534                                 pStart = __pending.data();
 535                                 pEnd = pStart + __pending.size();
 536                         }
 537
 538                         while (true)
 539                         {
 540                                 pEndOfMessage = IPC::Message::FindNext(pStart, pEnd);
 541                                 if (pEndOfMessage == NULL)
 542                                 {
 543                                         __pending.assign(pStart, pEnd - pStart);
 544                                         break;
 545                                 }
 546
 547                                 pMessage = new (std::nothrow) IPC::Message(pStart, pEndOfMessage - pStart);
 548                                 SysTryReturn(NID_IO, pMessage != null, FALSE, E_OUT_OF_MEMORY, "[E_OUT_OF_MEMORY] The memory is insufficient.");
 549
 550                                 __pCurrentChannel = source;
 551
 552                                 if (__pListener)
 553                                 {
 554                                         __pListener->OnIpcRequestReceived(*this, *pMessage);
 555                                 }
 556
 557                                 delete pMessage;
 558
 559                                 __pCurrentChannel = NULL;
 560
 561                                 pStart = pEndOfMessage;
 562                         }
 563                 }
 564         }
 565         else
 566         {
 567                 // empty statement
 568         }
 569
 570         return TRUE;
 571 }
 572
 573 gboolean
 574 IpcServer::OnReadMessage(GIOChannel* source, GIOCondition condition, gpointer data)
 575 {
 576         gboolean ret = FALSE;
 577         _ChannelInfo* pChannelInfo = (_ChannelInfo*) data;
 578         _ClientInfo* pClientInfo = pChannelInfo->pClientInfo;
 579         IpcServer* pIpcServer = (IpcServer*) pClientInfo->pIpcServer;
 580
 581         pIpcServer->__pCurrentClientInfo = pClientInfo;
 582         ret = pIpcServer->HandleReceivedMessage(source, condition, data);
 583         pIpcServer->__pCurrentClientInfo = null;
 584
 585         return ret;
 586 }
 587
 588 void*
 589 IpcServer::ThreadProc(void* pParam)
 590 {
 591         IpcServer* pIpcServer = (IpcServer*) pParam;
 592         if (pIpcServer != NULL)
 593         {
 594                 pIpcServer->Run(NULL);
 595         }
 596
 597         return NULL;
 598 }
 599
 600 void
 601 IpcServer::Run(void* pParam)
 602 {
 603         result r = E_SUCCESS;
 604
 605         if (__pListener == null)
 606         {
 607                 return;
 608         }
 609
 610         __pEventDispatcher = new (std::nothrow) _EventDispatcher;
 611         SysTryReturnVoidResult(NID_IO, __pEventDispatcher != null, E_OUT_OF_MEMORY, "[E_OUT_OF_MEMORY] The memory is insufficient.");
 612
 613         r = __pEventDispatcher->Construct(__pHandlerGMainContext);
 614         if (IsFailed(r))
 615         {
 616                 delete __pEventDispatcher;
 617                 __pEventDispatcher = null;
 618         }
 619
 620         __pListener->OnIpcServerStarted(*this);
 621
 622         g_main_loop_run(__pHandlerGMainLoop);
 623
 624         __pListener->OnIpcServerStopped(*this);
 625 }
 626
 627 result
 628 IpcServer::Start(void)
 629 {
 630         return E_SUCCESS;
 631 }
 632
 633 String
 634 IpcServer::GetName(void) const
 635 {
 636         return __name;
 637 }
 638
 639 result
 640 IpcServer::Stop(void)
 641 {
 642         result r = E_SUCCESS;
 643         int ret = 0;
 644
 645         SysTryReturnResult(NID_IO, __pListener != null, E_SYSTEM, "Listener is null.");
 646
 647         if (!__runOnCallerThread)
 648         {
 649                 pthread_t self = pthread_self();
 650
 651                 if (__pHandlerGMainLoop)
 652                 {
 653                         g_main_loop_quit(__pHandlerGMainLoop);
 654                 }
 655
 656                 if (__handlerThread != self)
 657                 {
 658                         ret = pthread_join(__handlerThread, null);
 659                         SysTryLog(NID_IO, ret == 0, "Join an IPC thread returns an error");
 660                 }
 661         }
 662         else
 663         {
 664                 __pListener->OnIpcServerStopped(*this);
 665         }
 666
 667         return r;
 668 }
 669
 670 bool
 671 IpcServer::Send(IPC::Message* msg)
 672 {
 673         gsize remain = 0;
 674         gsize written = 0;
 675         char* pData = NULL;
 676         GError* pGError = NULL;
 677
 678
 679         pData = (char*) msg->data();
 680         remain = msg->size();
 681
 682         if (msg->is_reply())
 683         {
 684                 while (remain > 0)
 685                 {
 686                         pGError = NULL;
 687                         g_io_channel_write_chars(__pCurrentChannel, (char*) pData, remain, &written, &pGError);
 688
 689                         remain -= written;
 690                         pData += written;
 691                 }
 692
 693                 g_io_channel_flush(__pCurrentChannel, &pGError);
 694         }
 695         else
 696         {
 697                 // empty statement;
 698         }
 699
 700         delete msg;
 701
 702         return true;
 703 }
 704
 705 result
 706 IpcServer::SendResponse(int client, IPC::Message* pMessage)
 707 {
 708         result r = E_SUCCESS;
 709         gsize remain = 0;
 710         gsize written = 0;
 711         char* pData = null;
 712         GError* pGError = null;
 713         _ClientInfo* pClientInfo = null;
 714         int ret = 0;
 715
 716         SysTryReturn(NID_IO, client >= 0 && pMessage != null, false, E_INVALID_ARG,
 717                                 "[E_INVALID_ARG] pMessage(0x%x) is null or clinet(%d) < 0", pMessage,
 718                                 client);
 719         SysTryCatch(NID_IO, !pMessage->is_sync(), r = E_INVALID_ARG, E_INVALID_ARG, "[E_INVALID_ARG] Can't send sync. messagee.");
 720
 721         pClientInfo = __clients[client];
 722         SysTryCatch(NID_IO, pClientInfo != null, r = E_INVALID_ARG, E_INVALID_ARG,
 723                            "[E_INVALID_ARG] client(%d) has not been registered.",
 724                            client);
 725
 726         pData = (char*) pMessage->data();
 727         remain = pMessage->size();
 728
 729         while (remain > 0)
 730         {
 731                 pGError = NULL;
 732                 ret = g_io_channel_write_chars(pClientInfo->pReverseChannel, (char*) pData, remain, &written, &pGError);
 733                 if (ret != G_IO_STATUS_NORMAL)
 734                 {
 735                         SysLog(NID_IO, "Failed to send a response: %d", ret);
 736                         SysTryCatch(NID_IO, ret != G_IO_STATUS_ERROR, , E_SYSTEM, "[E_SYSTEM] Error occurred during writing message to socket.");
 737                 }
 738
 739                 remain -= written;
 740                 pData += written;
 741         }
 742
 743         g_io_channel_flush(pClientInfo->pReverseChannel, &pGError);
 744
 745         delete pMessage;
 746
 747         return E_SUCCESS;
 748
 749 CATCH:
 750         delete pMessage;
 751         return r;
 752 }
 753
 754 result
 755 IpcServer::SendResponse(int client, const IPC::Message& message)
 756 {
 757         result r = E_SUCCESS;
 758         gsize remain = 0;
 759         gsize written = 0;
 760         char* pData = null;
 761         GError* pGError = null;
 762         _ClientInfo* pClientInfo = null;
 763         int ret = 0;
 764
 765         SysTryReturn(NID_IO, client >= 0, false, E_INVALID_ARG, "[E_INVALID_ARG] clinet(%d) < 0", client);
 766         SysTryCatch(NID_IO, !message.is_sync(), r = E_INVALID_ARG, E_INVALID_ARG, "[E_INVALID_ARG] Can't send sync. messagee.");
 767
 768         pClientInfo = __clients[client];
 769         SysTryCatch(NID_IO, pClientInfo != null, r = E_INVALID_ARG, E_INVALID_ARG,
 770                            "[E_INVALID_ARG] client(%d) has not been registered.",
 771                            client);
 772
 773         pData = (char*) message.data();
 774         remain = message.size();
 775
 776         while (remain > 0)
 777         {
 778                 pGError = NULL;
 779                 ret = g_io_channel_write_chars(pClientInfo->pReverseChannel, (char*) pData, remain, &written, &pGError);
 780                 if (ret != G_IO_STATUS_NORMAL)
 781                 {
 782                         SysLog(NID_IO, "Failed to send a response: %d", ret);
 783                         SysTryCatch(NID_IO, ret != G_IO_STATUS_ERROR, , E_SYSTEM, "[E_SYSTEM] Error occurred during writing message to socket.");
 784                 }
 785
 786                 remain -= written;
 787                 pData += written;
 788         }
 789
 790         g_io_channel_flush(pClientInfo->pReverseChannel, &pGError);
 791
 792         return E_SUCCESS;
 793
 794 CATCH:
 795         return r;
 796 }