How to discriminate if a MAC Address belongs to RJ45 Network Card or Wi-Fi...

[cydside]

Hi to all,
I'm parsing all the network interfaces using the following example code:

foreach (const QNetworkInterface &ni, QNetworkInterface::allInterfaces()) {
      qDebug() << ni.hardwareAddress();
      qDebug() << ni.name();
      qDebug() << ni.index();
}

foreach (const QNetworkInterface &ni, QNetworkInterface::allInterfaces()) {
      qDebug() << ni.hardwareAddress();
      qDebug() << ni.name();
      qDebug() << ni.index();
}

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but It seems impossible to get know what is the interface.
Need help!!!
Thanks