Can't resolve hostname from ip adress QHostInfo::fromName(IP)

[Antrouille]

Hello everyone,
I try to make a really simple program who return the host name on a network from it ip address.
Unfortunately every ip I tried return only the ip.

here is the code :
QHostInfo HI = QHostInfo::fromName("192.168.1.122"); // this PC hostname is "deian8-trb"
qDebug() << HI.hostName(); // display "192.168.2.122"

I try with lookupHost but the result are the same.

Did someone have an idea of the problem ?

[koahnig]

@Antrouille

Did you try localHostName?

[SGaist]

Hi,

From your description it looks like you should be using lookupHost.

[Antrouille]

@koahnig
For my local PC, I have no problem with fromName(IP) or localHostName.
But with any other PC than mine, I only get the IP.

@SGaist
Yes, I already tried lookuphost but with the same result.

Thanks for your help.

[achard.ju]

Do you have an upToDate host file on your computer ?
On Windows 7

%systemroot%\system32\drivers\etc\host

Or On Linux Systems

/etc/hosts

If not, i think that's the DNS in charge of name resolution. So the DNS have to provide name resolution for your local network.

[Antrouille]

@achard.ju

Thanks, I've check the linux host file, it seem to be ok (I test with a windows and linux machine).
But still the same :(

Now I need to see the IT guy for the DNS.

Thanks for your help.