Hi Martin,
I've (with some help) fixed the bug.
I currently have the code here
https://github.com/cyclops1982/pdns/tree/tsigforward
Could you build and try that version and see if it works for you?
Regards,
Ruben
On Tue, Aug 26, 2014 at 09:36:57AM +0200, Ruben d'Arco wrote:
> Hi Martin,
>
> No worries. PDNS is not my work, just hobby so i have to squeeze it in
> between all kinds of stuff :-)
>
> I am able to reproduce the issue locally now, which is already wonderful as
> that gives me options to debug it further.
>
> When a update message is forwarded, the message ID is rewritten (as per
> rfc2136). I think PDNS validates the message with that new ID, and it might
> need to do it with the old ID. I still need to figure out what is correct
> here. The old ID is in the message somewhere together with the TSIG record. I
> need to try and implement a fix like that to validate if this really is the
> case.
>
> So, we're moving forward and i hope i can give you a patched PDNS later this
> week.
>
> Regards,
> Ruben
>
>
> On Tue, Aug 26, 2014 at 03:57:31PM +0900, Martin Chandler wrote:
> > Hi Ruben,
> >
> > Sorry to keep bothering you on this, but I notice that dhcpd sends
> > the original update request via UDP, but bind forwards the request
> > via TCP.
> >
> > Could it be that there is some difference in the way PDNS is
> > handling TCP packets over UDP packets, and somehow mis-reading the
> > data that BIND is sending?
> >
> > That would possible explain why setting the dhcp server to talk
> > straight to PDNS works, because it would be sending the expected UDP
> > packet, but forwarding over TCP fails.
> >
> > btw, I also tried setting up a CentOS 6.5 server:
> > BIND 9.8.2
> > DHCPD 4.1.1
> > PDNS 3.4-rc1
> >
> > but get the same results (i.e. unsuccessful).
> >
> > Thanks,
> > Martin
>
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