[Kea-users] [kea-dev] kea-dhcp6 ignoring DHCPv6 messages received on a tuntap interface

Templin, Fred L Fred.L.Templin at boeing.com
Thu Apr 21 22:46:16 UTC 2016

Hi Francis,

Are there instructions for strace'ing the server process? Even so, would that
tell us anything that would help us find a solution? It is perplexing that we
have gotten this working over tuntap interfaces in other application contexts
but can't seem to get it working in this one.

Also, see attached for the packets in pcap form suitable for wireshark. The
packets appear to be formed properly.

Thanks - Fred

> -----Original Message-----
> From: Francis Dupont [mailto:fdupont at isc.org]
> Sent: Thursday, April 21, 2016 3:34 PM
> To: Templin, Fred L <Fred.L.Templin at boeing.com>
> Cc: kea-users at lists.isc.org; kea-dev at lists.isc.org; Benson, Michael W <michael.w.benson at boeing.com>
> Subject: Re: [kea-dev] [Kea-users] kea-dhcp6 ignoring DHCPv6 messages received on a tuntap interface
> As far as I know Kea used LPF for IPv4 (so it won't work with tun interfaces)
> but IPv6 UDP fro IPv6 so it should work. IMHO you should add some fprintf's
> in PktFilterInet6::receive to be sure packets are really received
> (or if you don't want to recompile strace the server process).
> And of course if you forgot flush the ip6table's...
> Regards
> Francis Dupont <fdupont at isc.org>

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