[Dnsmasq-discuss] dnsmasq sending truncated DHCPv6 packets

[Derek Higgins]

On Fri, 20 Dec 2019 at 19:12, Simon Kelley <simon at thekelleys.org.uk> wrote:
>
> On 19/12/2019 14:09, Derek Higgins wrote:
> > On Tue, 3 Dec 2019 at 18:36, Simon Kelley <simon at thekelleys.org.uk> wrote:
> >>
> >>> The patch to fix this is trivial: change the save_counter() call to
> >>>
> >>> save_counter(-1)
> >>>
> >>> I just checked, and this mistake only occurs here, and has been there
> >>> since forever.
> >>>
> >>> Good spot.
> >>>
> >>> Simon.
> >>>
> >>
> >> Patch committed:
> >>
> >> http://thekelleys.org.uk/gitweb/?p=dnsmasq.git;a=commit;h=f73f7397d7e99f8412b7dc465061d20f642cdc85
> >
> > Thanks for taking a look at this and sorry it's taken so long to get
> > back to you,
> > I've applied your patch to v2.76 and I'm afraid it doesn't appear to
> > have solved the problem.
> >
> > But I do have a little bit more info, I've noticed that this appears
> > to be linked to router advertisements, every
> > time I see a truncated packet it's always within milliseconds of a
> > router advertisement. When I turn off router
> > advertisements the truncated packets stop happening.
> >
> >
>
> I think I see the problem. Does
>
> http://thekelleys.org.uk/gitweb/?p=dnsmasq.git;a=commit;h=18a6bdd5414131699090d978b104e7f56ca0562a
>
> help?

Yes, this solved the problem, with the patch applied the truncated
packets no longer appear to be happening.

many thanks for your help,
Derek.

>
>
> Simon.
>
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> >
>
>
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