Get current ip address

[Trok]

Hi, I have problem with ip address.
How can i get current ip address on my pc? I tried used this code:

QHostInfo info;
    QNetworkInterface ifObj = QNetworkInterface::interfaceFromName(info.hostName());
    qDebug() << ifObj;

QHostInfo info;
    QNetworkInterface ifObj = QNetworkInterface::interfaceFromName(info.hostName());
    qDebug() << ifObj;

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It was returned:

QNetworkInterface( name = "", hardware address = "", flags = , entrise = () )

QNetworkInterface( name = "", hardware address = "", flags = , entrise = () )

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also I used function: QNetworkAddressEntry::ip () , but without results.

So, I wait for yours propositions to solve my problem.

[Lykurg]

Hi, nice to have you here. In this forum is a wonderful function: the search engine: Look here for example.

[Trok]

Hi, i saw that topic, Lykurg. First method is for Linux system, whilst second is wrong. I search functions to use for Windows.

I wait for more suggestions about my problem.

[Lykurg]

QList<QHostAddress> list = QNetworkInterface::allAddresses();

QList<QHostAddress> list = QNetworkInterface::allAddresses();

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gives you all addresses on your computer. if you also want bcst and mask use QNetworkAddressEntry with its functions broadcast and netmask.

[Trok]

That's good, but I have next problem. I don't see my general address whilst I see addresses to my router. I don't know how I can solve this problem. Do you have some ideas?

PS. Functions in class QNetworkAddressEntry are useless, because return 0. I don't know why?

[BastiBense]

That's good, but I have next problem. I don't see my general address whilst I see addresses to my router. I don't know how I can solve this problem. Do you have some ideas?

PS. Functions in class QNetworkAddressEntry are useless, because return 0. I don't know why?

There is no such thing as a "main address". There is just a default route that specifies a device to use (on all operating systems). I think one way to find out which your "primary" device is, is to use use a QTcpSocket and have it "connect" to a possibly non-existing address that is not on the local network, then use QAbstractSocket's localAddress() which returns a QHostAddress, which in turn contains the IP of the local interface. After that you can then find ouch wich interface has the said IP by searching through the list of QNetworkInterfaces.

I think there might be a easier way to find out which is your default network interface, but those approaches possibly require a linux/windows shell and are not platform independent.