Re: NetworkManager ignores virtual tap0 device

[Dan Williams <dcbw redhat com>]

On Wed, 2009-09-09 at 12:27 -0400, Yclept Nemo wrote:
> The tap0 device is created by openvpn but not pushed any network
> details - openvpn expects a dhcp client to lease an IP.

At the moment, NetworkManager only handles physical network interfaces.
It does have support for tap/tun devices, but only when using the
NetworkManager VPN plugins.  I don't think NetworkManager-openvpn has
support for DHCP yet, though we could enhance it to do so.

> When NetworkManager sees the device:
> Sep  9 11:41:09 cinnabar nm-system-settings: Added default wired
> connection 'Auto tap0'
> for /org/freedesktop/Hal/devices/net_de_c1_d5_98_e6_52

That is an error in NetworkManager; what Linux distribution are you
using?

Dan

> According to nm-connection-editor, aside from MAC addresses 'Auto
> tap0' is exactly like 'Auto eth0'
> 
> However when restarting NetworkManager, it attempts to start up the
> disconnected eth0 and then deactivates it, but doesn't touch tap0.
> With one failed assertion?
> Sep  9 12:08:13 cinnabar NetworkManager: <info>  Found radio
> killswitch /org/freedesktop/Hal/devices/pci_8086_4222_rfkill_3945ABG_wlan
> Sep  9 12:08:13 cinnabar NetworkManager: nm_device_ethernet_new:
> assertion `driver != NULL' failed
> Sep  9 12:08:13 cinnabar NetworkManager: <info>  (eth0): new Ethernet
> device (driver: 'b44')
> 
> And nm-tool lists only eth0 and wlan0. I also haven't found any HAL or
> PolicyKit policies that are preventing NetworkManager from managing
> the tap0 device.
> 
> Some details about the tap0 device:
> net.originating_device = '/org/freedesktop/Hal/devices/computer'
> (string)
> net.interface = 'tap0'  (string)
> linux.sysfs_path = '/sys/devices/virtual/net/tap0'  (string)
> info.parent = '/org/freedesktop/Hal/devices/computer'  (string)
> 
> 
> The convenience of NetworkManager managing the tap0 device is that it
> properly updates /etc/resolv.conf and doesn't mangle my routes (and
> also doesnt require sudo)
> 
> thanks
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