On Fri, 21 Nov 2003 17:08:07 -0700
David Stevens [off-list ref] wrote:

      The MLD v1 compatibility mode checks don't account for the
fact that extension headers are included in the ipv6 payload_len field.
That makes MLDv1 queries that include extension headers (like
Router Alert) appear to be v2 packets.
      The below patch fixes the problem.

Looks good.  I assume that all extension headers must appear
_before_ the igmp stuff, and therefore no other headers may
appear afterwards.

I'll apply this, thanks.