[src/trunk]: src/sys/netinet6 Clear IN6_IFF_DUPLICATED when link goes down or...

[roy <roy%NetBSD.org@localhost>]

details:   https://anonhg.NetBSD.org/src/rev/71e3e4149f14
branches:  trunk
changeset: 803566:71e3e4149f14
user:      roy <roy%NetBSD.org@localhost>
date:      Mon Nov 03 13:04:12 2014 +0000

description:
Clear IN6_IFF_DUPLICATED when link goes down or up.

diffstat:

 sys/netinet6/in6.c |  12 +++++++++---
 1 files changed, 9 insertions(+), 3 deletions(-)

diffs (47 lines):

diff -r ecb0cce97a94 -r 71e3e4149f14 sys/netinet6/in6.c
--- a/sys/netinet6/in6.c        Sun Nov 02 23:56:13 2014 +0000
+++ b/sys/netinet6/in6.c        Mon Nov 03 13:04:12 2014 +0000
@@ -1,4 +1,4 @@
-/*     $NetBSD: in6.c,v 1.178 2014/10/27 14:10:12 christos Exp $       */
+/*     $NetBSD: in6.c,v 1.179 2014/11/03 13:04:12 roy Exp $    */
 /*     $KAME: in6.c,v 1.198 2001/07/18 09:12:38 itojun Exp $   */
 
 /*
@@ -62,7 +62,7 @@
  */
 
 #include <sys/cdefs.h>
-__KERNEL_RCSID(0, "$NetBSD: in6.c,v 1.178 2014/10/27 14:10:12 christos Exp $");
+__KERNEL_RCSID(0, "$NetBSD: in6.c,v 1.179 2014/11/03 13:04:12 roy Exp $");
 
 #include "opt_inet.h"
 #include "opt_compat_netbsd.h"
@@ -2167,6 +2167,10 @@
 
                if (ia->ia6_flags & IN6_IFF_TENTATIVE) {
                        int rand_delay;
+
+                       /* Clear the duplicated flag as we're starting DAD. */
+                       ia->ia6_flags &= ~IN6_IFF_DUPLICATED;
+
                        /*
                         * The TENTATIVE flag was likely set by hand
                         * beforehand, implicitly indicating the need for DAD.
@@ -2196,6 +2200,7 @@
        /* interface may not support link state, so bring it up also */
        in6_if_link_up(ifp);
 }
+
 /*
  * Mark all addresses as detached.
  */
@@ -2229,7 +2234,8 @@
                            "%s marked detached\n",
                            ip6_sprintf(&ia->ia_addr.sin6_addr)));
                        ia->ia6_flags |= IN6_IFF_DETACHED;
-                       ia->ia6_flags &= ~IN6_IFF_TENTATIVE;
+                       ia->ia6_flags &=
+                           ~(IN6_IFF_TENTATIVE | IN6_IFF_DUPLICATED);
                        nd6_newaddrmsg(ifa);
                }
        }