Re: Bugs in network manager

[Maxim Levitsky <maximlevitsky gmail com>]

On Sat, 2008-11-29 at 17:57 +0100, Alexander Sack wrote:
> On Sat, Nov 29, 2008 at 05:03:08PM +0200, Maxim Levitsky wrote:
> > Recently I installed ubuntu 8.10.
> > 
> > I found few bugs in new network manager, and I like to report them here.
> > I will also fill them at bugzilla.
> > 
> > 
> > 1. any wireless connection marked as "system setting" doesn't work, nm
> > attempts to connect but fails.
> > Such connections confuse the nm to the point that it might even forget
> > about a connection and create a new one, I not sure about this, but I
> > avoid them now, as they really are unstable, nm even crashed few times
> > when system wide connections were there. On top of that to switch
> > between local and system connection it in not enought to toggle the
> > checkbox, but you must change any setting with the checkbox.
> 
> I think there have been improvements in trunk after we released
> intrepid. Though I dont know about crashes. Can you get backtraces for
> those cases?
> 
Will try to do so, thanks
btw, I won't have a problem to compile trunk of nm on interpid and use
it?

> 
> > 
> > 2. Auto enabled wired connections "Auto eth0" appear on each boot.
> > This means that even if I set up a manual connection and make it
> > autoconnect, on next boot "Auto eth0" will reappear and be used instead
> > of manual connection. Editing "auto eth0" doesn't help, it is reset
> > after boot.
> > 
> 
> Same here. I have to spot the right changes and then have to backport
> that.
Great!, I hate this bug so much....
> 
> 
> > 
> > 
> > 3. Even if I tell nm not to remember VPN password it still uses same
> > password if VPN connection failed (I talk about pptp) 
> > The problem is that I connect to network that uses one time password
> > generator combined with pin.
> > This means that if I mistype the pin or password, or time runs out, 
> > I can't reconnect since nm uses now surly invalid password.
> > 
> 
> Haven't heard of this bug ... which network-manager-pptp package are
> you using?
What do you mean?

dpkg -l network-manager-pptp

network-manager-pptp   0.7~~svn20081015t02462 network management
framework (PPTP plugin)


Btw, my university also support L2TP, I guess that this isn't supported
now, right?

Are there plans to add this.
They recommend using L2TP, and unlike PPTP it isn't microsoft technology

> 
> > 
> > 4. Link-local is broken, this is not your failt, the problem is that
> > avahi-autopid uses dbus to connect to some service, but it is forbidden
> > by dbus even for root, I fixed this, and I post details later.
> 
> you need to install dnsmasq-base package. We will add this to a
> Recommends, so it gets auto installed in future.
Doesn't help.

/usr/lib/NetworkManager/nm-avahi-autoipd.action is guilty.
it is trying to access org.freedesktop.nm_avahi_autoipd
but like I said it is forbidden even for root.
attached is a fix, that I created looking at other dbus permission
files.


> 
> > 
> > 5. If nat modules aren't compiled in kernel there is no warning about
> > that, but connection sharing just fails, I din't yet test this with nat
> > modules, would be fine to add description stating that this is NAT.
> > 
> 
> Error condition reporting probably could be improved in general.
Lets rename this to 'shared with other computers (NAT)'
Btw, nat isn't that simple, I need to see how this works, but
for correct sharing a dhcp server is needed and also interesting to know
what netmasks are used for network behind nat.
> 
> > 
> > 
> > 6. There is no way to tell with connection should control default
> > gateway.
> > I connect to my university via vpn to watch lectures, but I don't want
> > it to be the gateway, I only want vpn for their netmask.
> 
> You can edit the routes in the vpn settings. If I am not mistaken,
> there is a pending fix for making those settings be honoured in
> -proposed (so in a few days you will get the update).
Intersting, but I would like to have a checkbox, of following contents
for each connection:

"Use this connection for internet access"
which when checked will set default gateway.

> 
> > 
> > 
> > 7. Same when I use wired connection to my second laptop, for speed
> > reasons.
> > I know that I can provide no default gateway for connection, but this is
> > not enough, and on top of that this is only possible for static address,
> > but I can't use static address for my isp.
> > 
> > 
> > 8. More to come.
> 
> I will provide a 0.7 final backport soon in the network-manager PPA
> ... unfortunately we cannot put that right into intrepid, because on
> trunk there were last minute API/ABI changes which make this option
> impossible from a stable release policy perspective.
> 
>  - Alexander
> 
> _______________________________________________
> NetworkManager-list mailing list
> NetworkManager-list gnome org
> http://mail.gnome.org/mailman/listinfo/networkmanager-list

<!DOCTYPE busconfig PUBLIC
 "-//freedesktop//DTD D-BUS Bus Configuration 1.0//EN"
 "http://www.freedesktop.org/standards/dbus/1.0/busconfig.dtd";>
<busconfig>
	<policy user="root">
		<allow own="org.freedesktop.nm_avahi_autoipd"/>
		<allow send_interface="org.freedesktop.nm_avahi_autoipd"/>
    </policy>
    <policy context="default">
		<deny own="org.freedesktop.nm_avahi_autoipd"/>
		<deny send_interface="org.freedesktop.nm_avahi_autoipd"/>
    </policy>
</busconfig>