IP address setting by Qt

Dmitry Nikishov

Hi All,

I have the following code written in Qt to set the ethernet intefaces parameters :

void NetworkItfManager::setItfParams( QString& itfName, EthItf_t & params )
{
    QString cmd = QString("ifconfig %1 %2 netmask %3 broadcast %4").arg(itfName, params.m_ip, params.m_netmask, params.m_broadcast);
    QProcess bashCmd;

    bashCmd.start( cmd );

    while (bashCmd.waitForFinished()) ;
}

And I believe it works fine under Ubuntu when running the application with admin rights. But with Sitara SDK 5.0 I see it doesn't work. What is the right way to modify it? How should I set the permissions?

BR,

Dmitry

over 10 years ago

0 Biser Gatchev-XID over 10 years ago

TI__Guru**** 393215 points

Hi Dmitry,

Can you please post which Sitara and which SDK you are using?

0 Dmitry Nikishov over 10 years ago in reply to Biser Gatchev-XID

Intellectual 330 points

Hi Besier,

Sorry for not providing this info in my original post. I have am335x on my desk and SDK 5.0 with Qt4.7.3 inside ( from the SD card actually )

0 Biser Gatchev-XID over 10 years ago in reply to Dmitry Nikishov

TI__Guru**** 393215 points

This SDK is very old and no longer supported. Try either SDK 7.0 or 6.0:

http://software-dl.ti.com/sitara_linux/esd/AM335xSDK/latest/index_FDS.html

http://software-dl.ti.com/sitara_linux/esd/AM335xSDK/06_00_00_00/index_FDS.html

0 Dmitry Nikishov over 10 years ago in reply to Biser Gatchev-XID

Intellectual 330 points

But I guess "ifconfig" should not be affected by version incrementing :).
I see that "ifup eth0" works fine from the CLI. I believe smth is not fu8lly correct from Linux permission side...but what exactly it could be ?

0 Biser Gatchev-XID over 10 years ago in reply to Dmitry Nikishov

TI__Guru**** 393215 points

Check this wiki: http://processors.wiki.ti.com/index.php/AM335x_CPSW_(Ethernet)_Driver's_Guide You should configure your the AM335X Ethernet switch in Dual MAC mode.

0 Dmitry Nikishov over 10 years ago in reply to Biser Gatchev-XID

Intellectual 330 points

I'm able to set the interface IP via CLI - no proble, but when executing the stated Qt code, I see that eht0 settings haven't been changed. What's the difference?

0 Biser Gatchev-XID over 10 years ago in reply to Dmitry Nikishov

TI__Guru**** 393215 points

Have you tried to ifdown the interface first and then execute your code. Eth0 is up by default.

0 Dmitry Nikishov over 10 years ago in reply to Biser Gatchev-XID

Intellectual 330 points

Hm, let me try and I'll come back very soon...

0 Dmitry Nikishov over 10 years ago in reply to Dmitry Nikishov

Intellectual 330 points

Just checked it with ifdown/ifup - no effect...Any further ideas?

0 Yordan Kovachev over 10 years ago in reply to Dmitry Nikishov

TI__Guru**** 161600 points

Hi Dmitry,

I am not an expert with QT, but check the following discussion in QT forum:
http://qt-project.org/forums/viewthread/9670

Basically they suggest invoking the platform specific code (ifconfig, netcfg) using QT process.

Hope this helps.

Best Regards,
Yordan

0 Dmitry Nikishov over 10 years ago in reply to Yordan Kovachev

Intellectual 330 points

Hi Yordan,

Ok, so it seems that my App doesn't start with the right permissions. I've integrated it to Matrix subsystem ... but what is the right way to start it with root rights. Currently I'm trying :

#!/bin/sh

cd /usr/share/matrix-gui-2.0/apps/netApplet

echo root | sudo -S ./netApplet

but the application simply doesn't start...

Any suggestings?

BR,

Dmitry

0 Yordan Kovachev over 10 years ago in reply to Dmitry Nikishov

TI__Guru**** 161600 points

Hi Dmitry,

You should already be logged as root on your AM335x board and sudo is not required.

You can try to chown your application, changing its owner & group to root root, but it should already be with these settings.

Best Regards,

Yordan

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IP address setting by Qt