How to check internet connection in Qt

[saravanavelu39]

Hi all,,
@bool networkInterface::networkAvailable()
{
QList<QNetworkInterface> ifaces = QNetworkInterface::allInterfaces();
bool result = false;

for (int i = 0; i < ifaces.count(); i++)
{
    QNetworkInterface iface = ifaces.at(i);
    if ( iface.flags().testFlag(QNetworkInterface::IsUp)
         && !iface.flags().testFlag(QNetworkInterface::IsLoopBack) )
    {

        for (int j=0; j<iface.addressEntries().count(); j++)
        {
            if (result == false)
                result = true;
        }
    }

}
return result;

}
@

this code is checking internet and working correctly in windows,,,but if i disconnect the internet in ubuntu means still the online status is true,,Please give me a suggesstion,,
Thanks,,

[jafarabadi.qt]

Hi saravanavelu39, How are you friend? :)
I have a simple solution :)) very simple!!!
just ping 8.8.8.8 ip and check output...
Look at this:
@QProcess pingProcess;
QString exec = "ping";
QStringList params;
params << "-c" << "1" << IP;
pingProcess.start(exec,params,QIODevice::ReadOnly);
pingProcess.waitForFinished(-1);
QString p_stdout = pingProcess.readAllStandardOutput();
QString p_stderr = pingProcess.readAllStandardError();@

[saravanavelu39]

Hi Jafar,,
Thanks for your reply,,,I used your code,,that is working correctly in ubuntu,,but the application some time hangs after using this code,,so could you please give me a some other suggesstion,,

Thanks,

[jafarabadi.qt]

of course saravanavelu..
There are some solution in this link
i hope be useful :)
http://ubuntuforums.org/showthread.php?t=1803980