Hi,
Any news on this?
We have use cases with records returning 600+ IPs and the resolution fails
since it exceeds the payload.
Regards,
Anthonin
On Sun, Dec 2, 2018 at 6:46 PM Willy Tarreau wrote:
> On Thu, Oct 18, 2018 at 05:52:47PM +0200, Anthonin Bonnefoy wrote:
> > From: Anthonin Bonnefoy
> >
> > With EDNS, DNS packets can have a maximum size of 65507.
> > This will allow to have a bigger accepted_payload_size which is useful
> > when we have more than 100 SRV records.
>
> Baptiste, please have a look at this one, I want to be sure we don't
> miss it if needed.
>
> Thanks,
> Willy
>
> > ---
> > include/types/dns.h | 5 -
> > 1 file changed, 4 insertions(+), 1 deletion(-)
> >
> > diff --git a/include/types/dns.h b/include/types/dns.h
> > index 488d3996..53f24c19 100644
> > --- a/include/types/dns.h
> > +++ b/include/types/dns.h
> > @@ -42,7 +42,10 @@
> > */
> > #define DNS_MAX_LABEL_SIZE 63
> > #define DNS_MAX_NAME_SIZE255
> > -#define DNS_MAX_UDP_MESSAGE 8192
> > +/* With EDNS, DNS message can reach the maximum size of an UDP message
> > + * which is (65535 - 8 bytes UDP header - 20 bytes IP header)
> > + */
> > +#define DNS_MAX_UDP_MESSAGE 65507
> >
> > /* DNS minimun record size: 1 char + 1 NULL + type + class */
> > #define DNS_MIN_RECORD_SIZE (1 + 1 + 2 + 2)
> > --
> > 2.13.2
> >
>
