Re: Querying network state via D-Bus; unexpected result values

[Jirka Klimes <jklimes redhat com>]

On Monday 28 of November 2011 02:14:07 Adam Tauno Williams wrote:
> I'm attempting to interrogate the state of the network condition via
> Network Manager's D-Bus service.  I can reliably get a value, but the
> value seems incorrect.
> 
> According to
> <http://projects.gnome.org/NetworkManager/developers/spec-07.html#type-NM_D
> EVICE_STATE> I expect to see a value of 8 [NM_DEVICE_STATE_ACTIVATED] if
> the device is online.   But what I see from call is generally a 20 if the
> interface [Device 0, eth0] is unplugged and a value of 100 if the
> interface is online.
> 

The link you use is for NM 0.7, but according to device states value you 
apparently use NM 0.9 that changed state codes.
So, 100 = NM_DEVICE_STATE_ACTIVATED now.

The API spec for NM 0.9 is here:
http://projects.gnome.org/NetworkManager/developers/api/09/spec.html#type-
NM_DEVICE_STATE

API spec for NM 0.8:
http://projects.gnome.org/NetworkManager/developers/api/08/spec-08.html#type-
NM_DEVICE_STATE

Jirka

> #!/bin/env python
> import dbus
> 
> bus = dbus.SystemBus()
> proxy = bus.get_object("org.freedesktop.NetworkManager",
> "/org/freedesktop/NetworkManager")
> manager = dbus.Interface(proxy, "org.freedesktop.NetworkManager")
> # Get device-specific state
> devices = manager.GetDevices()
> for d in devices:
>      dev_proxy = bus.get_object("org.freedesktop.NetworkManager", d)
>      prop_iface = dbus.Interface(dev_proxy,
> "org.freedesktop.DBus.Properties") # Get the device's current state and
> interface name
>      state = prop_iface.Get("org.freedesktop.NetworkManager.Device",
> "State") name = prop_iface.Get("org.freedesktop.NetworkManager.Device",
> "Interface")
>      # and print them out
>      print state
>      if state == 8:   # activated
>          print "Device %s is activated" % name
>      else:
>          print "Device %s is not activated" % name
> 
> 
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