diff options
Diffstat (limited to 'freebsd/sys/netinet6/nd6_rtr.c')
| -rw-r--r-- | freebsd/sys/netinet6/nd6_rtr.c | 38 |
1 files changed, 38 insertions, 0 deletions
diff --git a/freebsd/sys/netinet6/nd6_rtr.c b/freebsd/sys/netinet6/nd6_rtr.c index a60e7c66..59868383 100644 --- a/freebsd/sys/netinet6/nd6_rtr.c +++ b/freebsd/sys/netinet6/nd6_rtr.c @@ -206,6 +206,37 @@ nd6_rs_input(struct mbuf *m, int off, int icmp6len) m_freem(m); } +#ifdef EXPERIMENTAL +/* + * An initial update routine for draft-ietf-6man-ipv6only-flag. + * We need to iterate over all default routers for the given + * interface to see whether they are all advertising the "6" + * (IPv6-Only) flag. If they do set, otherwise unset, the + * interface flag we later use to filter on. + */ +static void +defrtr_ipv6_only_ifp(struct ifnet *ifp) +{ + struct nd_defrouter *dr; + bool ipv6_only; + + ipv6_only = true; + ND6_RLOCK(); + TAILQ_FOREACH(dr, &V_nd_defrouter, dr_entry) + if (dr->ifp == ifp && + (dr->raflags & ND_RA_FLAG_IPV6_ONLY) == 0) + ipv6_only = false; + ND6_RUNLOCK(); + + IF_AFDATA_WLOCK(ifp); + if (ipv6_only) + ND_IFINFO(ifp)->flags |= ND6_IFF_IPV6_ONLY; + else + ND_IFINFO(ifp)->flags &= ~ND6_IFF_IPV6_ONLY; + IF_AFDATA_WUNLOCK(ifp); +} +#endif + /* * Receive Router Advertisement Message. * @@ -321,6 +352,9 @@ nd6_ra_input(struct mbuf *m, int off, int icmp6len) } } dr = defrtrlist_update(&dr0); +#ifdef EXPERIMENTAL + defrtr_ipv6_only_ifp(ifp); +#endif } /* @@ -694,6 +728,10 @@ defrouter_del(struct nd_defrouter *dr) if (ND_IFINFO(dr->ifp)->flags & ND6_IFF_ACCEPT_RTADV) rt6_flush(&dr->rtaddr, dr->ifp); +#ifdef EXPERIMENTAL + defrtr_ipv6_only_ifp(dr->ifp); +#endif + if (dr->installed) { deldr = dr; defrouter_delreq(dr); |