On 2018/10/03 12:36, Aham Brahmasmi wrote:
> Hi Stuart,
>
> Thank you for your response.
>
> > > 2) How to disable an interface from joining IPv6 Node Information
> > > multicast group (RFC 4620)?
> > > In sys/netinet6/in6.c, the function in6_update_ifa contains the
> > > following lines:
> > >
> > > /*
> > > * join node information group address
> > > */
> > > if (in6_nigroup(ifp, hostname, hostnamelen, &mltaddr) == 0) {
> > > imm = in6_joingroup(ifp, &mltaddr.sin6_addr, &error);
> > > if (!imm) {
> > > /* XXX not very fatal, go on... */
> > > } else {
> > > LIST_INSERT_HEAD(&ia6->ia6_memberships,
> > > imm, i6mm_chain);
> > > }
> > > }
> >
> > Not 100% sure but I think this may have been missed when support for
> > RFC 4620 was removed from the kernel in 2014
> >
> > https://github.com/openbsd/src/commit/43f29087ef2fc515510c43f9dd706f7bbd9e39b7
>
> You may be probably right, although I do not claim to understand IPv6.
> My best guess is that the code block might have been originally present
> in the KAME project.
Yes the original code was in the original import from KAME. The code
that actually *processed* these queries was removed in the commit I
mentioned (so it seems your main concern is already dealt with), but
I think the interfaces are still joined to the group so will receive
those packets.
