Introduce RTM_CHGADDRATTR to inform userland on the route socket when

an attribute of an address is changed.
For now it's used when IPv6 duplicate address detection finishes.

With this slaacd(8) can find out if a configured address is not
duplicated without the need to poll.

OK phessler, benno, claudio

diff --git a/sys/net/route.h b/sys/net/route.h
index 43386fa..6643dd7 100644 (file)
--- a/sys/net/route.h
+++ b/sys/net/route.h
@@ -1,4 +1,4 @@
-/*     $OpenBSD: route.h,v 1.171 2018/07/01 08:53:03 mpi Exp $ */
+/*     $OpenBSD: route.h,v 1.172 2018/07/12 16:07:35 florian Exp $     */
 /*     $NetBSD: route.h,v 1.9 1996/02/13 22:00:49 christos Exp $       */
 
 /*
@@ -240,6 +240,7 @@ struct rt_msghdr {
 #define RTM_INVALIDATE 0x11    /* Invalidate cache of L2 route */
 #define RTM_BFD                0x12    /* bidirectional forwarding detection */
 #define RTM_PROPOSAL   0x13    /* proposal for netconfigd */
+#define RTM_CHGADDRATTR        0x14    /* address attribute change */
 
 #define RTV_MTU                0x1     /* init or lock _mtu */
 #define RTV_HOPCOUNT   0x2     /* init or lock _hopcount */

diff --git a/sys/netinet6/nd6_nbr.c b/sys/netinet6/nd6_nbr.c
index d63279a..a90f852 100644 (file)
--- a/sys/netinet6/nd6_nbr.c
+++ b/sys/netinet6/nd6_nbr.c
@@ -1,4 +1,4 @@
-/*     $OpenBSD: nd6_nbr.c,v 1.123 2018/06/11 08:48:54 mpi Exp $       */
+/*     $OpenBSD: nd6_nbr.c,v 1.124 2018/07/12 16:07:35 florian Exp $   */
 /*     $KAME: nd6_nbr.c,v 1.61 2001/02/10 16:06:14 jinmei Exp $        */
 
 /*
@@ -1100,6 +1100,9 @@ nd6_dad_start(struct ifaddr *ifa)
        KASSERT(ia6->ia6_flags & IN6_IFF_TENTATIVE);
        if ((ia6->ia6_flags & IN6_IFF_ANYCAST) || (!ip6_dad_count)) {
                ia6->ia6_flags &= ~IN6_IFF_TENTATIVE;
+
+               rtm_addr(RTM_CHGADDRATTR, ifa);
+
                return;
        }
 
@@ -1248,6 +1251,8 @@ nd6_dad_timer(void *xifa)
                         */
                        ia6->ia6_flags &= ~IN6_IFF_TENTATIVE;
 
+                       rtm_addr(RTM_CHGADDRATTR, ifa);
+
                        nd6log((LOG_DEBUG,
                            "%s: DAD complete for %s - no duplicates found\n",
                            ifa->ifa_ifp->if_xname,
@@ -1291,6 +1296,9 @@ nd6_dad_duplicated(struct dadq *dp)
            ia6->ia_ifp->if_xname);
 
        TAILQ_REMOVE(&dadq, dp, dad_list);
+
+       rtm_addr(RTM_CHGADDRATTR, dp->dad_ifa);
+
        ifafree(dp->dad_ifa);
        free(dp, M_IP6NDP, sizeof(*dp));
        ip6_dad_pending--;