Execute address hooks in the update case.

This matches what IPv4 is doing and unbreak carp(4) when the same
address is set twice, for example when running netstart(8) multiple
times.

Issue reported by and fix from Simon Mages.

diff --git a/sys/netinet6/in6.c b/sys/netinet6/in6.c
index bd0b315..219c6c9 100644 (file)
--- a/sys/netinet6/in6.c
+++ b/sys/netinet6/in6.c
@@ -1,4 +1,4 @@
-/*     $OpenBSD: in6.c,v 1.189 2016/07/13 08:40:46 mpi Exp $   */
+/*     $OpenBSD: in6.c,v 1.190 2016/08/08 13:09:36 mpi Exp $   */
 /*     $KAME: in6.c,v 1.372 2004/06/14 08:14:21 itojun Exp $   */
 
 /*
@@ -438,8 +438,10 @@ in6_ioctl(u_long cmd, caddr_t data, struct ifnet *ifp, int privileged)
                        break;
                }
 
-               if (!newifaddr)
+               if (!newifaddr) {
+                       dohooks(ifp->if_addrhooks, 0);
                        break;
+               }
 
                /* Perform DAD, if needed. */
                if (ia6->ia6_flags & IN6_IFF_TENTATIVE)