Chris Webb <ch...@arachsys.com> writes:
> The lan-facing interface br0 always has a v6 ULA address, but may sometimes
> also have a global v6 address with a default v6 route available.
[...]
> Is there an easy way to have non-zero lifetime for advertisements for the
> global prefix, but drop the route lifetime to zero for advertisements for
> the ULA prefix?
I dug into this a bit. radv.c already has a special case which sets the
router lifetime to zero when only old prefixes are being advertised. This
is nice because it does something sensible out-of-the-box, without special
config wrangling.
I wonder if we should also set the router lifetime to zero when there
are no globally-routable addresses to advertise, e.g. something like the
following which I'm running locally:
diff --git a/src/radv.c b/src/radv.c
index 5820f4a..16737c4 100644
--- a/src/radv.c
+++ b/src/radv.c
@@ -402,8 +402,8 @@ static void send_ra_alias(time_t now, int iface, char
*iface_name, struct in6_ad
up = &context->next;
}
- /* If we're advertising only old prefixes, set router lifetime to zero. */
- if (old_prefix && !parm.found_context)
+ /* If we're advertising only local or old prefixes, set router lifetime to
zero. */
+ if ((old_prefix && !parm.found_context) || parm.glob_pref_time == 0)
ra->lifetime = htons(0);
/* No prefixes to advertise. */
_______________________________________________
Dnsmasq-discuss mailing list
Dnsmasq-discuss@lists.thekelleys.org.uk
https://lists.thekelleys.org.uk/cgi-bin/mailman/listinfo/dnsmasq-discuss
