v4ov6: enable unsupported nodes to announce v4ov6 routes
In the following topology
A --[v4]-- B --[v6]-- C
if B does not support v4ov6 (eg. because of an old kernel), it can
nevertheless announce a v4-over-v6 route to C, since the route in its
own routing table is pure v4.
@@ -1222,8 +1222,6 @@ really_buffer_update(struct buffered *buf, struct interface *ifp,
if(v4) {
if(!ifp->ipv4) {
- if(!has_v4ov6)
- return;
ae = AE_V4OV6;
} else {
ae = AE_IPV4;
