[vbox-dev] Setting linkstate using API?

Klaus Espenlaub klaus.espenlaub at oracle.com
Thu Jul 24 19:04:10 GMT 2014

On 24.07.2014 10:29, Karoline Haus wrote:
> No I'm pretty sure I'm getting the right machine object and the 
> session is valid as well. I can change other properties.
Mysterious... VBoxManage doesn't do anything special in this area.

> Do I have to call saveSettings() after changing cableConnected, or 
> will it have immediate effect without calling saveSettings()?
The usual rules for runtime settings changes apply: they take immediate 
effect, but it's good practice to save such settings. Many do that 
automatically (which is kind of inconsistent), but if you can't change 
the setting you want it's irrelevant to talk about saving.

> Thanks, Karoline
> Klaus Espenlaub <klaus.espenlaub at oracle.com> schrieb am 18:56 
> Mittwoch, 23.Juli 2014:
> Karoline,
> On 23.07.2014 16:34, Karoline Haus wrote:
> > Hi if I use VBoxManage I can disconnect a VM's virtual network cable
> > using controlvm setlinkstate while the VM is running but I do not seem
> > to be able to do that via the API/SDK. I don't seem to find the right
> > commands to set. I tried to set cableConnected of INetworkAdapter but it
> > does not allow me to change this while the VM is in running state. How
> > can I unplug the cable via the API whilst the VM is running?
> This means you're using the wrong Machine object, or completely lack the
> session handling... it works fundamentally the same way as if the VM
> isn't running: create a session, get a shared lock (an exclusive one
> isn't possible while the VM is running), and use the Machine reference
> associated with this session.
> That one is writable.
> > Basically I'm trying to simulate a network connection loss to the VM so
> > that it then tries to obtain a new IP address via DHCP.
> Klaus
> >
> > Thanks
> > Karoline
> <mailto:vbox-dev at virtualbox.org><https://www.virtualbox.org/mailman/listinfo/vbox-dev> 
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