On Wed, Jan 21, 2026 at 02:02:09PM +0100, Stefano Brivio wrote:
> On Sun, 18 Jan 2026 17:16:06 -0500
> Jon Maloy <jmaloy@redhat.com> wrote:
[snip]
> > @@ -1230,30 +1238,34 @@ static void conf_print(const struct ctx *c)
> >  	}
> >  
> >  	if (c->ifi6) {
> > +		bool do_slaac = !c->no_ndp || !c->no_dhcpv6;
> 
> We can enable DHCPv6 and disable SLAAC though. The "SL" in SLAAC stands
> for "stateless", DHCPv6 is stateful. We can enable both, one, or none.

Hm.. I thought DHCPv6 was designed to require SLAAC (although in a
kind of minimal mode).

> The 'dns6' label was meant to avoid a variable like this one and
> another block, maybe it would be more practical to keep it.
> 
> > +
> >  		if (!IN6_IS_ADDR_UNSPECIFIED(&c->ip6.map_host_loopback))
> >  			info("    NAT to host ::1: %s",
> >  			     inet_ntop(AF_INET6, &c->ip6.map_host_loopback,
> >  				       buf6, sizeof(buf6)));
> >  
> > -		if (!c->no_ndp && !c->no_dhcpv6)
> > -			info("NDP/DHCPv6:");
> > -		else if (!c->no_dhcpv6)
> > -			info("DHCPv6:");
> > -		else if (!c->no_ndp)
> > -			info("NDP:");
> > -		else
> > -			goto dns6;
> > -
> > -		info("    assign: %s",
> > -		     inet_ntop(AF_INET6, &c->ip6.addrs[0].addr.a6,
> > -			       buf6, sizeof(buf6)));
> > -		info("    router: %s",
> > -		     inet_ntop(AF_INET6, &c->ip6.guest_gw, buf6, sizeof(buf6)));
> > -		info("    our link-local: %s",
> > -		     inet_ntop(AF_INET6, &c->ip6.our_tap_ll,
> > -			       buf6, sizeof(buf6)));
> > -
> > -dns6:
> > +		if (do_slaac) {
> > +			if (!c->no_ndp && !c->no_dhcpv6)
> > +				info("NDP/DHCPv6:");
> > +			else if (!c->no_dhcpv6)
> > +				info("DHCPv6:");
> > +			else
> > +				info("NDP:");
> > +
> > +			for (i = 0; i < c->ip6.addr_count; i++) {
> > +				info("    assign: %s",
> > +				     inet_ntop(AF_INET6, &c->ip6.addrs[i].addr.a6,
> > +					       buf6, sizeof(buf6)));
> 
> I don't see a matching change for neither NDP nor DHCPv6, so we
> shouldn't really print more than one address (at least until this
> point).
> 
> > +			}
> > +			info("    router: %s",
> > +			     inet_ntop(AF_INET6, &c->ip6.guest_gw,
> > +				       buf6, sizeof(buf6)));
> > +			info("    our link-local: %s",
> > +			     inet_ntop(AF_INET6, &c->ip6.our_tap_ll,
> > +				       buf6, sizeof(buf6)));
> > +		}
> > +
> >  		for (i = 0; !IN6_IS_ADDR_UNSPECIFIED(&c->ip6.dns[i]); i++) {
> >  			if (!i)
> >  				info("DNS:");
> 
> I reviewed up to 5/9 so far, no further comments until then.
> 
> -- 
> Stefano
> 

-- 
David Gibson (he or they)	| I'll have my music baroque, and my code
david AT gibson.dropbear.id.au	| minimalist, thank you, not the other way
				| around.
http://www.ozlabs.org/~dgibson