[user/henk/code/inspircd.git] / src / inspircd.cpp

/*
 * InspIRCd -- Internet Relay Chat Daemon
 *
 *   Copyright (C) 2012 William Pitcock <nenolod@dereferenced.org>
 *   Copyright (C) 2009-2010 Daniel De Graaf <danieldg@inspircd.org>
 *   Copyright (C) 2003-2008 Craig Edwards <craigedwards@brainbox.cc>
 *   Copyright (C) 2008 Uli Schlachter <psychon@znc.in>
 *   Copyright (C) 2006-2008 Robin Burchell <robin+git@viroteck.net>
 *   Copyright (C) 2006-2007 Oliver Lupton <oliverlupton@gmail.com>
 *   Copyright (C) 2007 Dennis Friis <peavey@inspircd.org>
 *   Copyright (C) 2007 Burlex <???@???>
 *   Copyright (C) 2003 Craig McLure <craig@chatspike.net>
 *   Copyright (C) 2003 randomdan <???@???>
 *
 * This file is part of InspIRCd.  InspIRCd is free software: you can
 * redistribute it and/or modify it under the terms of the GNU General Public
 * License as published by the Free Software Foundation, version 2.
 *
 * This program is distributed in the hope that it will be useful, but WITHOUT
 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS
 * FOR A PARTICULAR PURPOSE.  See the GNU General Public License for more
 * details.
 *
 * You should have received a copy of the GNU General Public License
 * along with this program.  If not, see <http://www.gnu.org/licenses/>.
 */


#include "inspircd.h"
#include <signal.h>

#ifndef _WIN32
        #include <dirent.h>
        #include <unistd.h>
        #include <sys/resource.h>
        #include <dlfcn.h>
        #include <getopt.h>
        #include <pwd.h> // setuid
        #include <grp.h> // setgid
#else
        WORD g_wOriginalColors;
        WORD g_wBackgroundColor;
        HANDLE g_hStdout;
#endif

#include <fstream>
#include <iostream>
#include "xline.h"
#include "exitcodes.h"
#include "testsuite.h"

InspIRCd* ServerInstance = NULL;

/** Seperate from the other casemap tables so that code *can* still exclusively rely on RFC casemapping
 * if it must.
 *
 * This is provided as a pointer so that modules can change it to their custom mapping tables,
 * e.g. for national character support.
 */
unsigned const char *national_case_insensitive_map = rfc_case_insensitive_map;


/* Moved from exitcodes.h -- due to duplicate symbols -- Burlex
 * XXX this is a bit ugly. -- w00t
 */
const char* ExitCodes[] =
{
                "No error",                                                             // 0
                "DIE command",                                                  // 1
                "Config file error",                                    // 2
                "Logfile error",                                                // 3
                "POSIX fork failed",                                    // 4
                "Bad commandline parameters",                   // 5
                "Can't write PID file",                                 // 6
                "SocketEngine could not initialize",    // 7
                "Refusing to start up as root",                 // 8
                "Couldn't load module on startup",              // 9
                "Received SIGTERM"                                              // 10
};

#ifdef INSPIRCD_ENABLE_TESTSUITE
/** True if we have been told to run the testsuite from the commandline,
 * rather than entering the mainloop.
 */
static int do_testsuite = 0;
#endif

template<typename T> static void DeleteZero(T*&n)
{
        T* t = n;
        n = NULL;
        delete t;
}

void InspIRCd::Cleanup()
{
        // Close all listening sockets
        for (unsigned int i = 0; i < ports.size(); i++)
        {
                ports[i]->cull();
                delete ports[i];
        }
        ports.clear();

        GlobalCulls.Apply();
        Modules->UnloadAll();

        /* Delete objects dynamically allocated in constructor (destructor would be more appropriate, but we're likely exiting) */
        /* Must be deleted before modes as it decrements modelines */
        if (FakeClient)
        {
                delete FakeClient->server;
                FakeClient->cull();
        }
        DeleteZero(this->FakeClient);
        DeleteZero(this->XLines);
        DeleteZero(this->Config);
        SocketEngine::Deinit();
        Logs->CloseLogs();
}

void InspIRCd::SetSignals()
{
#ifndef _WIN32
        signal(SIGALRM, SIG_IGN);
        signal(SIGHUP, InspIRCd::SetSignal);
        signal(SIGPIPE, SIG_IGN);
        signal(SIGCHLD, SIG_IGN);
        /* We want E2BIG not a signal! */
        signal(SIGXFSZ, SIG_IGN);
#endif
        signal(SIGTERM, InspIRCd::SetSignal);
}

// Required for returning the proper value of EXIT_SUCCESS for the parent process
static void VoidSignalHandler(int signalreceived)
{
        exit(EXIT_STATUS_NOERROR);
}

bool InspIRCd::DaemonSeed()
{
#ifdef _WIN32
        std::cout << "InspIRCd Process ID: " << con_green << GetCurrentProcessId() << con_reset << std::endl;
        return true;
#else
        // Do not use exit() here: It will exit with status SIGTERM which would break e.g. daemon scripts
        signal(SIGTERM, VoidSignalHandler);

        int childpid = fork();
        if (childpid < 0)
                return false;
        else if (childpid > 0)
        {
                /* We wait here for the child process to kill us,
                 * so that the shell prompt doesnt come back over
                 * the output.
                 * Sending a kill with a signal of 0 just checks
                 * if the child pid is still around. If theyre not,
                 * they threw an error and we should give up.
                 */
                while (kill(childpid, 0) != -1)
                        sleep(1);
                exit(EXIT_STATUS_NOERROR);
        }
        setsid ();
        std::cout << "InspIRCd Process ID: " << con_green << getpid() << con_reset << std::endl;

        signal(SIGTERM, InspIRCd::SetSignal);

        rlimit rl;
        if (getrlimit(RLIMIT_CORE, &rl) == -1)
        {
                this->Logs->Log("STARTUP", LOG_DEFAULT, "Failed to getrlimit()!");
                return false;
        }
        rl.rlim_cur = rl.rlim_max;

        if (setrlimit(RLIMIT_CORE, &rl) == -1)
                        this->Logs->Log("STARTUP", LOG_DEFAULT, "setrlimit() failed, cannot increase coredump size.");

        return true;
#endif
}

void InspIRCd::WritePID(const std::string& filename, bool exitonfail)
{
#ifndef _WIN32
        if (!ServerInstance->Config->cmdline.writepid)
        {
                this->Logs->Log("STARTUP", LOG_DEFAULT, "--nopid specified on command line; PID file not written.");
                return;
        }

        std::string fname(filename);
        if (fname.empty())
                fname = ServerInstance->Config->Paths.PrependData("inspircd.pid");
        std::ofstream outfile(fname.c_str());
        if (outfile.is_open())
        {
                outfile << getpid();
                outfile.close();
        }
        else
        {
                if (exitonfail)
                        std::cout << "Failed to write PID-file '" << fname << "', exiting." << std::endl;
                this->Logs->Log("STARTUP", LOG_DEFAULT, "Failed to write PID-file '%s'%s", fname.c_str(), (exitonfail ? ", exiting." : ""));
                if (exitonfail)
                        Exit(EXIT_STATUS_PID);
        }
#endif
}

InspIRCd::InspIRCd(int argc, char** argv) :
         ConfigFileName(INSPIRCD_CONFIG_PATH "/inspircd.conf"),
         PI(&DefaultProtocolInterface),

         /* Functor pointer initialisation.
          *
          * THIS MUST MATCH THE ORDER OF DECLARATION OF THE FUNCTORS, e.g. the methods
          * themselves within the class.
          */
         GenRandom(&DefaultGenRandom),
         IsChannel(&DefaultIsChannel),
         IsNick(&DefaultIsNick),
         IsIdent(&DefaultIsIdent)
{
        ServerInstance = this;

        FailedPortList pl;
        // Flag variables passed to getopt_long() later
        int do_version = 0, do_nofork = 0, do_debug = 0,
            do_nolog = 0, do_nopid = 0, do_root = 0;

        // Initialize so that if we exit before proper initialization they're not deleted
        this->Config = 0;
        this->XLines = 0;
        this->ConfigThread = NULL;
        this->FakeClient = NULL;

        UpdateTime();
        this->startup_time = TIME.tv_sec;

        SocketEngine::Init();

        this->Config = new ServerConfig;
        dynamic_reference_base::reset_all();
        this->XLines = new XLineManager;

        this->Config->cmdline.argv = argv;
        this->Config->cmdline.argc = argc;

#ifdef _WIN32
        srand(TIME.tv_nsec ^ TIME.tv_sec);

        // Initialize the console values
        g_hStdout = GetStdHandle(STD_OUTPUT_HANDLE);
        CONSOLE_SCREEN_BUFFER_INFO bufinf;
        if(GetConsoleScreenBufferInfo(g_hStdout, &bufinf))
        {
                g_wOriginalColors = bufinf.wAttributes & 0x00FF;
                g_wBackgroundColor = bufinf.wAttributes & 0x00F0;
        }
        else
        {
                g_wOriginalColors = FOREGROUND_RED|FOREGROUND_BLUE|FOREGROUND_GREEN;
                g_wBackgroundColor = 0;
        }
#else
        srandom(TIME.tv_nsec ^ TIME.tv_sec);
#endif

        struct option longopts[] =
        {
                { "nofork",     no_argument,            &do_nofork,     1       },
                { "config",     required_argument,      NULL,           'c'     },
                { "debug",      no_argument,            &do_debug,      1       },
                { "nolog",      no_argument,            &do_nolog,      1       },
                { "nopid",      no_argument,            &do_nopid,      1       },
                { "runasroot",  no_argument,            &do_root,       1       },
                { "version",    no_argument,            &do_version,    1       },
#ifdef INSPIRCD_ENABLE_TESTSUITE
                { "testsuite",  no_argument,            &do_testsuite,  1       },
#endif
                { 0, 0, 0, 0 }
        };

        int c;
        int index;
        while ((c = getopt_long(argc, argv, ":c:", longopts, &index)) != -1)
        {
                switch (c)
                {
                        case 'c':
                                /* Config filename was set */
                                ConfigFileName = optarg;
#ifdef _WIN32
                                TCHAR configPath[MAX_PATH + 1];
                                if (GetFullPathName(optarg, MAX_PATH, configPath, NULL) > 0)
                                        ConfigFileName = configPath;
#else
                                char configPath[PATH_MAX + 1];
                                if (realpath(optarg, configPath))
                                        ConfigFileName = configPath;
#endif
                        break;
                        case 0:
                                /* getopt_long_only() set an int variable, just keep going */
                        break;
                        case '?':
                                /* Unknown parameter */
                        default:
                                /* Fall through to handle other weird values too */
                                std::cout << "Unknown parameter '" << argv[optind-1] << "'" << std::endl;
                                std::cout << "Usage: " << argv[0] << " [--nofork] [--nolog] [--nopid] [--debug] [--config <config>]" << std::endl <<
                                        std::string(static_cast<size_t>(8+strlen(argv[0])), ' ') << "[--runasroot] [--version]" << std::endl;
                                Exit(EXIT_STATUS_ARGV);
                        break;
                }
        }

#ifdef INSPIRCD_ENABLE_TESTSUITE
        if (do_testsuite)
                do_nofork = do_debug = true;
#endif

        if (do_version)
        {
                std::cout << std::endl << INSPIRCD_VERSION << std::endl;
                Exit(EXIT_STATUS_NOERROR);
        }

#ifdef _WIN32
        // Set up winsock
        WSADATA wsadata;
        WSAStartup(MAKEWORD(2,2), &wsadata);
#endif

        /* Set the finished argument values */
        Config->cmdline.nofork = (do_nofork != 0);
        Config->cmdline.forcedebug = (do_debug != 0);
        Config->cmdline.writelog = !do_nolog;
        Config->cmdline.writepid = !do_nopid;

        if (do_debug)
        {
                FileWriter* fw = new FileWriter(stdout, 1);
                FileLogStream* fls = new FileLogStream(LOG_RAWIO, fw);
                Logs->AddLogTypes("*", fls, true);
        }

        if (!FileSystem::FileExists(ConfigFileName))
        {
#ifdef _WIN32
                /* Windows can (and defaults to) hide file extensions, so let's play a bit nice for windows users. */
                std::string txtconf = this->ConfigFileName;
                txtconf.append(".txt");

                if (FileSystem::FileExists(txtconf))
                {
                        ConfigFileName = txtconf;
                }
                else
#endif
                {
                        std::cout << "ERROR: Cannot open config file: " << ConfigFileName << std::endl << "Exiting..." << std::endl;
                        this->Logs->Log("STARTUP", LOG_DEFAULT, "Unable to open config file %s", ConfigFileName.c_str());
                        Exit(EXIT_STATUS_CONFIG);
                }
        }

        std::cout << con_green << "InspIRCd - Internet Relay Chat Daemon" << con_reset << std::endl;
        std::cout << "For contributors & authors: " << con_green << "See /INFO Output" << con_reset << std::endl;

#ifndef _WIN32
        if (!do_root)
                this->CheckRoot();
        else
        {
                std::cout << "* WARNING * WARNING * WARNING * WARNING * WARNING *" << std::endl
                << "YOU ARE RUNNING INSPIRCD AS ROOT. THIS IS UNSUPPORTED" << std::endl
                << "AND IF YOU ARE HACKED, CRACKED, SPINDLED OR MUTILATED" << std::endl
                << "OR ANYTHING ELSE UNEXPECTED HAPPENS TO YOU OR YOUR" << std::endl
                << "SERVER, THEN IT IS YOUR OWN FAULT. IF YOU DID NOT MEAN" << std::endl
                << "TO START INSPIRCD AS ROOT, HIT CTRL+C NOW AND RESTART" << std::endl
                << "THE PROGRAM AS A NORMAL USER. YOU HAVE BEEN WARNED!" << std::endl << std::endl
                << "InspIRCd starting in 20 seconds, ctrl+c to abort..." << std::endl;
                sleep(20);
        }
#endif

        this->SetSignals();

        if (!Config->cmdline.nofork)
        {
                if (!this->DaemonSeed())
                {
                        std::cout << "ERROR: could not go into daemon mode. Shutting down." << std::endl;
                        Logs->Log("STARTUP", LOG_DEFAULT, "ERROR: could not go into daemon mode. Shutting down.");
                        Exit(EXIT_STATUS_FORK);
                }
        }

        SocketEngine::RecoverFromFork();

        /* During startup we read the configuration now, not in
         * a seperate thread
         */
        this->Config->Read();
        this->Config->Apply(NULL, "");
        Logs->OpenFileLogs();

        // If we don't have a SID, generate one based on the server name and the server description
        if (Config->sid.empty())
                Config->sid = UIDGenerator::GenerateSID(Config->ServerName, Config->ServerDesc);

        // Initialize the UID generator with our sid
        this->UIDGen.init(Config->sid);

        // Create the server user for this server
        this->FakeClient = new FakeUser(Config->sid, Config->ServerName, Config->ServerDesc);

        // This is needed as all new XLines are marked pending until ApplyLines() is called
        this->XLines->ApplyLines();

        int bounditems = BindPorts(pl);

        std::cout << std::endl;

        this->Modules->LoadAll();

        // Build ISupport as ModuleManager::LoadAll() does not do it
        this->ISupport.Build();
        Config->ApplyDisabledCommands();

        if (!pl.empty())
        {
                std::cout << std::endl << "WARNING: Not all your client ports could be bound -- " << std::endl << "starting anyway with " << bounditems
                        << " of " << bounditems + (int)pl.size() << " client ports bound." << std::endl << std::endl;
                std::cout << "The following port(s) failed to bind:" << std::endl << std::endl;
                int j = 1;
                for (FailedPortList::iterator i = pl.begin(); i != pl.end(); i++, j++)
                {
                        std::cout << j << ".\tAddress: " << i->first.str() << " \tReason: " << strerror(i->second) << std::endl;
                }

                std::cout << std::endl << "Hint: Try using a public IP instead of blank or *" << std::endl;
        }

        std::cout << "InspIRCd is now running as '" << Config->ServerName << "'[" << Config->GetSID() << "] with " << SocketEngine::GetMaxFds() << " max open sockets" << std::endl;

#ifndef _WIN32
        if (!Config->cmdline.nofork)
        {
                if (kill(getppid(), SIGTERM) == -1)
                {
                        std::cout << "Error killing parent process: " << strerror(errno) << std::endl;
                        Logs->Log("STARTUP", LOG_DEFAULT, "Error killing parent process: %s",strerror(errno));
                }
        }

        /* Explicitly shut down stdio's stdin/stdout/stderr.
         *
         * The previous logic here was to only do this if stdio was connected to a controlling
         * terminal.  However, we must do this always to avoid information leaks and other
         * problems related to stdio.
         *
         * The only exception is if we are in debug mode.
         *
         *    -- nenolod
         */
        if ((!do_nofork) && (!Config->cmdline.forcedebug))
        {
                int fd = open("/dev/null", O_RDWR);

                fclose(stdin);
                fclose(stderr);
                fclose(stdout);

                if (dup2(fd, STDIN_FILENO) < 0)
                        Logs->Log("STARTUP", LOG_DEFAULT, "Failed to dup /dev/null to stdin.");
                if (dup2(fd, STDOUT_FILENO) < 0)
                        Logs->Log("STARTUP", LOG_DEFAULT, "Failed to dup /dev/null to stdout.");
                if (dup2(fd, STDERR_FILENO) < 0)
                        Logs->Log("STARTUP", LOG_DEFAULT, "Failed to dup /dev/null to stderr.");
                close(fd);
        }
        else
        {
                Logs->Log("STARTUP", LOG_DEFAULT, "Keeping pseudo-tty open as we are running in the foreground.");
        }
#else
        /* Set win32 service as running, if we are running as a service */
        SetServiceRunning();

        // Handle forking
        if(!do_nofork)
        {
                FreeConsole();
        }

        QueryPerformanceFrequency(&stats.QPFrequency);
#endif

        Logs->Log("STARTUP", LOG_DEFAULT, "Startup complete as '%s'[%s], %lu max open sockets", Config->ServerName.c_str(),Config->GetSID().c_str(), SocketEngine::GetMaxFds());

#ifndef _WIN32
        ConfigTag* security = Config->ConfValue("security");

        const std::string SetGroup = security->getString("runasgroup");
        if (!SetGroup.empty())
        {
                errno = 0;
                if (setgroups(0, NULL) == -1)
                {
                        this->Logs->Log("STARTUP", LOG_DEFAULT, "setgroups() failed (wtf?): %s", strerror(errno));
                        exit(EXIT_STATUS_CONFIG);
                }

                struct group* g = getgrnam(SetGroup.c_str());
                if (!g)
                {
                        this->Logs->Log("STARTUP", LOG_DEFAULT, "getgrnam(%s) failed (wrong group?): %s", SetGroup.c_str(), strerror(errno));
                        exit(EXIT_STATUS_CONFIG);
                }

                if (setgid(g->gr_gid) == -1)
                {
                        this->Logs->Log("STARTUP", LOG_DEFAULT, "setgid(%d) failed (wrong group?): %s", g->gr_gid, strerror(errno));
                        exit(EXIT_STATUS_CONFIG);
                }
        }

        const std::string SetUser = security->getString("runasuser");
        if (!SetUser.empty())
        {
                errno = 0;
                struct passwd* u = getpwnam(SetUser.c_str());
                if (!u)
                {
                        this->Logs->Log("STARTUP", LOG_DEFAULT, "getpwnam(%s) failed (wrong user?): %s", SetUser.c_str(), strerror(errno));
                        exit(EXIT_STATUS_CONFIG);
                }

                if (setuid(u->pw_uid) == -1)
                {
                        this->Logs->Log("STARTUP", LOG_DEFAULT, "setuid(%d) failed (wrong user?): %s", u->pw_uid, strerror(errno));
                        exit(EXIT_STATUS_CONFIG);
                }
        }

        this->WritePID(Config->PID);
#endif
}

void InspIRCd::UpdateTime()
{
#ifdef _WIN32
        SYSTEMTIME st;
        GetSystemTime(&st);

        TIME.tv_sec = time(NULL);
        TIME.tv_nsec = st.wMilliseconds;
#else
        #ifdef HAS_CLOCK_GETTIME
                clock_gettime(CLOCK_REALTIME, &TIME);
        #else
                struct timeval tv;
                gettimeofday(&tv, NULL);
                TIME.tv_sec = tv.tv_sec;
                TIME.tv_nsec = tv.tv_usec * 1000;
        #endif
#endif
}

void InspIRCd::Run()
{
#ifdef INSPIRCD_ENABLE_TESTSUITE
        /* See if we're supposed to be running the test suite rather than entering the mainloop */
        if (do_testsuite)
        {
                TestSuite* ts = new TestSuite;
                delete ts;
                return;
        }
#endif

        UpdateTime();
        time_t OLDTIME = TIME.tv_sec;

        while (true)
        {
#ifndef _WIN32
                static rusage ru;
#endif

                /* Check if there is a config thread which has finished executing but has not yet been freed */
                if (this->ConfigThread && this->ConfigThread->IsDone())
                {
                        /* Rehash has completed */
                        this->Logs->Log("CONFIG", LOG_DEBUG, "Detected ConfigThread exiting, tidying up...");

                        this->ConfigThread->Finish();

                        ConfigThread->join();
                        delete ConfigThread;
                        ConfigThread = NULL;
                }

                UpdateTime();

                /* Run background module timers every few seconds
                 * (the docs say modules shouldnt rely on accurate
                 * timing using this event, so we dont have to
                 * time this exactly).
                 */
                if (TIME.tv_sec != OLDTIME)
                {
#ifndef _WIN32
                        getrusage(RUSAGE_SELF, &ru);
                        stats.LastSampled = TIME;
                        stats.LastCPU = ru.ru_utime;
#else
                        if(QueryPerformanceCounter(&stats.LastSampled))
                        {
                                FILETIME CreationTime;
                                FILETIME ExitTime;
                                FILETIME KernelTime;
                                FILETIME UserTime;
                                GetProcessTimes(GetCurrentProcess(), &CreationTime, &ExitTime, &KernelTime, &UserTime);
                                stats.LastCPU.dwHighDateTime = KernelTime.dwHighDateTime + UserTime.dwHighDateTime;
                                stats.LastCPU.dwLowDateTime = KernelTime.dwLowDateTime + UserTime.dwLowDateTime;
                        }
#endif

                        /* Allow a buffer of two seconds drift on this so that ntpdate etc dont harass admins */
                        if (TIME.tv_sec < OLDTIME - 2)
                        {
                                SNO->WriteToSnoMask('a', "\002EH?!\002 -- Time is flowing BACKWARDS in this dimension! Clock drifted backwards %lu secs.", (unsigned long)(OLDTIME-TIME.tv_sec));
                        }
                        else if (TIME.tv_sec > OLDTIME + 2)
                        {
                                SNO->WriteToSnoMask('a', "\002EH?!\002 -- Time is jumping FORWARDS! Clock skipped %lu secs.", (unsigned long)(TIME.tv_sec - OLDTIME));
                        }

                        OLDTIME = TIME.tv_sec;

                        if ((TIME.tv_sec % 3600) == 0)
                        {
                                FOREACH_MOD(OnGarbageCollect, ());

                                // HACK: ELines are not expired properly at the moment but it can't be fixed as
                                // the 2.0 XLine system is a spaghetti nightmare. Instead we skip over expired
                                // ELines in XLineManager::CheckELines() and expire them here instead.
                                XLines->GetAll("E");
                        }

                        Timers.TickTimers(TIME.tv_sec);
                        Users->DoBackgroundUserStuff();

                        if ((TIME.tv_sec % 5) == 0)
                        {
                                FOREACH_MOD(OnBackgroundTimer, (TIME.tv_sec));
                                SNO->FlushSnotices();
                        }
                }

                /* Call the socket engine to wait on the active
                 * file descriptors. The socket engine has everything's
                 * descriptors in its list... dns, modules, users,
                 * servers... so its nice and easy, just one call.
                 * This will cause any read or write events to be
                 * dispatched to their handlers.
                 */
                SocketEngine::DispatchTrialWrites();
                SocketEngine::DispatchEvents();

                /* if any users were quit, take them out */
                GlobalCulls.Apply();
                AtomicActions.Run();

                if (s_signal)
                {
                        this->SignalHandler(s_signal);
                        s_signal = 0;
                }
        }
}

sig_atomic_t InspIRCd::s_signal = 0;

void InspIRCd::SetSignal(int signal)
{
        s_signal = signal;
}

/* On posix systems, the flow of the program starts right here, with
 * ENTRYPOINT being a #define that defines main(). On Windows, ENTRYPOINT
 * defines smain() and the real main() is in the service code under
 * win32service.cpp. This allows the service control manager to control
 * the process where we are running as a windows service.
 */
ENTRYPOINT
{
        new InspIRCd(argc, argv);
        ServerInstance->Run();
        delete ServerInstance;
        return 0;
}