Getting MAC ID in Qt

Question

I am using the following code to get the MAC ID in Qt.

main.cpp

#include <QtCore/QCoreApplication>
#include "QtNetwork/QNetworkInterface"
#include "QString"

QString getMacAddress()
{
    foreach(QNetworkInterface interface, QNetworkInterface::allInterfaces())
    {
        // Return only the first non-loopback MAC Address
        if (!(interface.flags() & QNetworkInterface::IsLoopBack))
            return interface.hardwareAddress();
        QString text = interface.hardwareAddress();
        qDebug() << text;
    }
    return QString();
}

int main(int argc, char *argv[])
{
    getMacAddress();
    QCoreApplication a(argc, argv);
    return a.exec();
}

I am getting nothing in Console? Guide me thanks...

Rhotacism

did you include CONFIG += console in your .pro? – Laryngeal

@Laryngeal Yeah I did, FYI here's my project source: QT += core QT += network QT -= gui TARGET = qmacid CONFIG += console CONFIG -= app_bundle TEMPLATE = app SOURCES += main.cpp I presume there is some problem in getMacAddress() function. – Rhotacism

huh..return interface.hardwareAddress(); so perhaps it returns there without printing anything. – Laryngeal

Right, how can I save it to QString? OR do I need to convert it or something? – Rhotacism

Look at interface.allAddresses() instead of just the hardwareAddress. – Wenzel

@Sosukodo thanks for it, right, how I got to show it on my Console window?? kindly help – Rhotacism

Remove your conditional that checks for IsLoopBack. – Wenzel

The hardwareAddress is obviously empty for the interface that's passing your conditional so you should look at all interfaces with your own eyes to see what data is available. – Wenzel

@Sosukodo Yeah I did, but it displays nothing in the COnsole – Rhotacism

Possible duplicate of Obtaining MAC address on windows in Qt – Recall

Answer 1

Try this code so show the hardware addresses of each interface:

QString getMacAddress()
{
    QString text;
    foreach(QNetworkInterface interface, QNetworkInterface::allInterfaces())
    {
        text += "Interface:"+interface.hardwareAddress()+"\n";
    }
    return text;
}

int main(int argc, char *argv[])
{
    QCoreApplication a(argc, argv);
    printf( "%s\n", getMacAddress().toAscii().constData() );
    exit(1);
    return a.exec();
}

Wenzel

note: to pass QString as const char * use qPrintable(string) – Pierson