Kernel doesn't propagate DNSSL to userspace (e.g. NetworkManager)

Kernel doesn't propagate DNSSL to userspace (e.g. NetworkManager)

[Pavel Simerda]

Hi,

I filed a bugreport to about lack of DNSSL support in kernel:

https://bugzilla.redhat.com/show_bug.cgi?id=824121

While NetworkManager recieves RDNSS neighbor discovery user option from kernel, it doesn't recieve DNSSL at all. This can be debugged with NetworkManager
(or hopefully some better testing tool) and radvdump (to check if DNSSL is present).

radvdump reports DNSSL is there, NetworkManager gets no netlink message from kernel.

kernel-3.3.4-4.fc17.x86_64
NetworkManager-0.9.4.0-7.git20120403.fc17.x86_64

Dave Jones asked me to contact this ML directly. I'm offlist.

Cheers,

Pavel Šimerda

Re: Kernel doesn't propagate DNSSL to userspace (e.g. NetworkManager)

[Dan Williams]

On Wed, 2012-05-23 at 04:16 -0400, Pavel Simerda wrote:
> Hi,
> 
> I filed a bugreport to about lack of DNSSL support in kernel:
> 
> https://bugzilla.redhat.com/show_bug.cgi?id=824121
> 
> While NetworkManager recieves RDNSS neighbor discovery user option from kernel, it doesn't recieve DNSSL at all. This can be debugged with NetworkManager
> (or hopefully some better testing tool) and radvdump (to check if DNSSL is present).
> 
> radvdump reports DNSSL is there, NetworkManager gets no netlink message from kernel.
> 
> kernel-3.3.4-4.fc17.x86_64
> NetworkManager-0.9.4.0-7.git20120403.fc17.x86_64
> 
> Dave Jones asked me to contact this ML directly. I'm offlist.

So Pierre Ossman sent some RFC patches for DNSSL back in December 2010,
but Dave Miller wanted actual formal submissions which Pierre never got
around to doing.  I'll resubmit Pierre's second patch, which exports all
options the kernel doesn't care about to userspace.

Sun, 12 Dec 2010:
"[RFC][PATCH] Export all RA options that we don't handle to userspace"

Dan

Re: Kernel doesn't propagate DNSSL to userspace (e.g. NetworkManager)

[Dan Williams]

On Wed, 2012-05-23 at 09:24 -0500, Dan Williams wrote:
> On Wed, 2012-05-23 at 04:16 -0400, Pavel Simerda wrote:
> > Hi,
> > 
> > I filed a bugreport to about lack of DNSSL support in kernel:
> > 
> > https://bugzilla.redhat.com/show_bug.cgi?id=824121
> > 
> > While NetworkManager recieves RDNSS neighbor discovery user option from kernel, it doesn't recieve DNSSL at all. This can be debugged with NetworkManager
> > (or hopefully some better testing tool) and radvdump (to check if DNSSL is present).
> > 
> > radvdump reports DNSSL is there, NetworkManager gets no netlink message from kernel.
> > 
> > kernel-3.3.4-4.fc17.x86_64
> > NetworkManager-0.9.4.0-7.git20120403.fc17.x86_64
> > 
> > Dave Jones asked me to contact this ML directly. I'm offlist.
> 
> So Pierre Ossman sent some RFC patches for DNSSL back in December 2010,
> but Dave Miller wanted actual formal submissions which Pierre never got
> around to doing.  I'll resubmit Pierre's second patch, which exports all
> options the kernel doesn't care about to userspace.
> 
> Sun, 12 Dec 2010:
> "[RFC][PATCH] Export all RA options that we don't handle to userspace"

Well, it appears that e35f30c1 from 2012-04-06 (should be in the 3.4
kernel?) actually adds support for passing DNSSL to userspace, basically
what Pierre's first patch from 2010 did.  So thanks Alexey :)  I think
we should be good now for DNSSL?

Dan