Re: How can I obtain DHCP4Config, IP4Config of an active VPN connection?

[Chris Nogen <chrisnog inbox com>]

> -----Original Message-----
> From: dcbw redhat com
> Sent: Fri, 26 Apr 2013 12:56:05 -0500
> To: psimerda redhat com
> Subject: Re: How can I obtain DHCP4Config, IP4Config of an active VPN
> connection?
>
> On Fri, 2013-04-26 at 13:22 -0400, Pavel Simerda wrote:
> > ----- Original Message -----
> > > From: "Chris Nogen" <chrisnog inbox com>
> > > To: networkmanager-list gnome org
> > > Sent: Friday, April 26, 2013 5:44:07 PM
> > > Subject: How can I obtain DHCP4Config, IP4Config of an active VPN
> > > connection?
> > >
> > > Hi everyone,
> > >
> > > I'm currently working with NetworkManager and python in order to
> > > connect to
> > > my network company with a VPN.
> > > The python script performs just simple actions like connect VPN through
> > > my
> > > wired interface and then automatically configure my code to reach
> > > company
> > > servers.
> > >
> > > Everything worked properly until I wanted to grab DHCP4Config return by
> > > the
> > > VPN server. Indeed, with a simple connection the way to track this
> > > information is to get the device and then ask for those parameters.
> > > Workflow:
> > > 1. [org.freedesktop.NetworkManager.Connection.Active] => [Properties]
> > > =>
> > > [Devices]
> > > 2. [org.freedesktop.NetworkManager.Device] => [Properties] =>
> > > [DHCP4Config,
> > > IP4Config, ...]
> > >
> > > But with a VPN connection, you cannot track the device because Network
> > > Manager didn't add "tun" or "tap" device to the devices list.
> >
> > Looks like a missing API. I think it warrants a bug report at
> > http://bugzilla.gnome.org/, where the possible solutions/additions
> > should be discussed. Thank you for bringing this up as this may help us
> > with the upcoming architectural changes.
>
> Yes, it is missing API, and a bug for it would be good.
>
> Dan

Hi,

First of all, thank you for your responses. 
I have been busy for few days but I'm looking forward to write the bug report.

Meanwhile, for those who are interested, I found a way to grab this information. 
Just after calling NetworkManager.ActivateConnection method, you must register to VPN.Plugin.Ip4Config 
signal. You will get an array with the properties I wanted. 
It's a bit tricky, but it works. 
To connect to this signal you should use these configurations: 
* Service: org.freedesktop.NetworkManager.PluginName which pluginname is the plugin you use. For example, 
with openvpn: org.freedesktop.NetworkManager.openvpn. I don't know why it's not possible to use directly 
org.freedesktop.NetworkManager
* Object path: /org/freedesktop/NetworkManager/VPN/Plugin
* Interface: org.freedesktop.NetworkManager.VPN.Plugin

My solution means one things, NetworkManager currently store information however there is no way to looking 
for it.

Thanks for your help,
Chris

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