C++ MythSocket::DownRef方法代码示例

/**
 * \brief Can we talk to port on host?
 */
bool telnet(const QString &host, int port)
{
    MythSocket *s = new MythSocket();

    bool connected = s->connect(host, port);
    s->DownRef();

    return connected;
}

int connect_to_master(void)
{
    MythSocket *tempMonitorConnection = new MythSocket();
    if (tempMonitorConnection->connect(
            gCoreContext->GetSetting("MasterServerIP", "127.0.0.1"),
            gCoreContext->GetNumSetting("MasterServerPort", 6543)))
    {
        if (!gCoreContext->CheckProtoVersion(tempMonitorConnection))
        {
            VERBOSE(VB_IMPORTANT, "Master backend is incompatible with "
                    "this backend.\nCannot become a slave.");
            return GENERIC_EXIT_CONNECT_ERROR;
        }

        QStringList tempMonitorDone("DONE");

        QStringList tempMonitorAnnounce("ANN Monitor tzcheck 0");
        tempMonitorConnection->writeStringList(tempMonitorAnnounce);
        tempMonitorConnection->readStringList(tempMonitorAnnounce);
        if (tempMonitorAnnounce.empty() ||
            tempMonitorAnnounce[0] == "ERROR")
        {
            tempMonitorConnection->DownRef();
            tempMonitorConnection = NULL;
            if (tempMonitorAnnounce.empty())
            {
                VERBOSE(VB_IMPORTANT, LOC_ERR +
                        "Failed to open event socket, timeout");
            }
            else
            {
                VERBOSE(VB_IMPORTANT, LOC_ERR +
                        "Failed to open event socket" +
                        ((tempMonitorAnnounce.size() >= 2) ?
                         QString(", error was %1").arg(tempMonitorAnnounce[1]) :
                         QString(", remote error")));
            }
        }

        QStringList tzCheck("QUERY_TIME_ZONE");
        if (tempMonitorConnection)
        {
            tempMonitorConnection->writeStringList(tzCheck);
            tempMonitorConnection->readStringList(tzCheck);
        }
        if (tzCheck.size() && !checkTimeZone(tzCheck))
        {
            // Check for different time zones, different offsets, different
            // times
            VERBOSE(VB_IMPORTANT, "The time and/or time zone settings on "
                    "this system do not match those in use on the master "
                    "backend. Please ensure all frontend and backend "
                    "systems are configured to use the same time zone and "
                    "have the current time properly set.");
            VERBOSE(VB_IMPORTANT,
                    "Unable to run with invalid time settings. Exiting.");
            tempMonitorConnection->writeStringList(tempMonitorDone);
            tempMonitorConnection->DownRef();
            return GENERIC_EXIT_INVALID_TIMEZONE;
        }
        else
        {
            VERBOSE(VB_IMPORTANT,
                    QString("Backend is running in %1 time zone.")
                    .arg(getTimeZoneID()));
        }
        if (tempMonitorConnection)
            tempMonitorConnection->writeStringList(tempMonitorDone);
    }
    if (tempMonitorConnection)
        tempMonitorConnection->DownRef();

    return GENERIC_EXIT_OK;
}

MythSocket *RemoteFile::openSocket(bool control)
{
    QUrl qurl(path);
    QString dir;

    QString host = qurl.host();
    int port = qurl.port();

    dir = qurl.path();

    if (qurl.hasQuery())
        dir += "?" + QUrl::fromPercentEncoding(qurl.encodedQuery());

    if (qurl.hasFragment())
        dir += "#" + qurl.fragment();

    QString sgroup = qurl.userName();

    MythSocket *lsock = new MythSocket();
    QString stype = (control) ? "control socket" : "file data socket";

    QString loc_err = QString("RemoteFile::openSocket(%1), Error: ").arg(stype);

    if (port <= 0)
    {
        port = GetMythDB()->GetSettingOnHost("BackendServerPort", host).toInt();

        // if we still have no port use the default
        if (port <= 0)
            port = 6543;
    }

    if (!lsock->connect(host, port))
    {
        LOG(VB_GENERAL, LOG_ERR,
                QString("Could not connect to server %1:%2")
                    .arg(host).arg(port));
        lsock->DownRef();
        return NULL;
    }

    QString hostname = GetMythDB()->GetHostName();

    QStringList strlist;

    if (control)
    {
        strlist.append(QString("ANN Playback %1 %2").arg(hostname).arg(false));
        lsock->writeStringList(strlist);
        if (!lsock->readStringList(strlist, true))
        {
            LOG(VB_GENERAL, LOG_ERR,
                    QString("\n\t\t\tCould not read string list from server "
                            "%1:%2").arg(host).arg(port));
            lsock->DownRef();
            return NULL;
        }
    }
    else
    {
        strlist.push_back(QString("ANN FileTransfer %1 %2 %3 %4")
                          .arg(hostname).arg(writemode)
                          .arg(usereadahead).arg(timeout_ms));
        strlist << QString("%1").arg(dir);
        strlist << sgroup;

        QStringList::const_iterator it = possibleauxfiles.begin();
        for (; it != possibleauxfiles.end(); ++it)
            strlist << *it;

        if (!lsock->writeStringList(strlist) ||
            !lsock->readStringList(strlist, true))
        {
            LOG(VB_GENERAL, LOG_ERR,
                    QString("Did not get proper response from %1:%2")
                    .arg(host).arg(port));
            strlist.clear();
            strlist.push_back("ERROR");
            strlist.push_back("invalid response");
        }

        if (strlist.size() >= 3)
        {
            it = strlist.begin(); ++it;
            recordernum = (*it).toInt(); ++it;
            filesize = (*(it)).toLongLong(); ++it;
            for (; it != strlist.end(); ++it)
                auxfiles << *it;
        }
        else if (0 < strlist.size() && strlist.size() < 3 &&
                 strlist[0] != "ERROR")
        {
            LOG(VB_GENERAL, LOG_ERR,
                    QString("Did not get proper response from %1:%2")
                    .arg(host).arg(port));
            strlist.clear();
            strlist.push_back("ERROR");
            strlist.push_back("invalid response");
        }
    }
//.........这里部分代码省略.........

MythSocket *MythCoreContext::ConnectCommandSocket(
    const QString &hostname, int port, const QString &announce,
    bool *p_proto_mismatch, bool gui, int maxConnTry, int setup_timeout)
{
    MythSocket *serverSock = NULL;

    {
        QMutexLocker locker(&d->m_WOLInProgressLock);
        d->WaitForWOL();
    }

    QString WOLcmd = GetSetting("WOLbackendCommand", "");

    if (maxConnTry < 1)
        maxConnTry = max(GetNumSetting("BackendConnectRetry", 1), 1);

    int WOLsleepTime = 0, WOLmaxConnTry = 0;
    if (!WOLcmd.isEmpty())
    {
        WOLsleepTime  = GetNumSetting("WOLbackendReconnectWaitTime", 0);
        WOLmaxConnTry = max(GetNumSetting("WOLbackendConnectRetry", 1), 1);
        maxConnTry    = max(maxConnTry, WOLmaxConnTry);
    }

    bool we_attempted_wol = false;

    if (setup_timeout <= 0)
        setup_timeout = MythSocket::kShortTimeout;

    bool proto_mismatch = false;
    for (int cnt = 1; cnt <= maxConnTry; cnt++)
    {
        LOG(VB_GENERAL, LOG_INFO, LOC +
            QString("Connecting to backend server: %1:%2 (try %3 of %4)")
                .arg(hostname).arg(port).arg(cnt).arg(maxConnTry));

        serverSock = new MythSocket();

        int sleepms = 0;
        if (serverSock->connect(hostname, port))
        {
            if (SetupCommandSocket(
                    serverSock, announce, setup_timeout, proto_mismatch))
            {
                break;
            }

            if (proto_mismatch)
            {
                if (p_proto_mismatch)
                    *p_proto_mismatch = true;

                serverSock->DownRef();
                serverSock = NULL;
                break;
            }

            setup_timeout = (int)(setup_timeout * 1.5f);
        }
        else if (!WOLcmd.isEmpty() && (cnt < maxConnTry))
        {
            if (!we_attempted_wol)
            {
                QMutexLocker locker(&d->m_WOLInProgressLock);
                if (d->m_WOLInProgress)
                {
                    d->WaitForWOL();
                    continue;
                }

                d->m_WOLInProgress = we_attempted_wol = true;
            }

            myth_system(WOLcmd, kMSDontDisableDrawing | kMSDontBlockInputDevs |
                                kMSProcessEvents);
            sleepms = WOLsleepTime * 1000;
        }

        serverSock->DownRef();
        serverSock = NULL;

        if (!serverSock && (cnt == 1))
        {
            QCoreApplication::postEvent(
                d->m_GUIcontext, new MythEvent("CONNECTION_FAILURE"));
        }

        if (sleepms)
            usleep(sleepms * 1000);
    }

    if (we_attempted_wol)
    {
        QMutexLocker locker(&d->m_WOLInProgressLock);
        d->m_WOLInProgress = false;
        d->m_WOLInProgressWaitCondition.wakeAll();
    }

    if (!serverSock && !proto_mismatch)
    {
//.........这里部分代码省略.........