[src/trunk]: src/sys If, for whatever reason, a local interface route is remo...

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

details:   https://anonhg.NetBSD.org/src/rev/9bb2681a8705
branches:  trunk
changeset: 810679:9bb2681a8705
user:      roy <roy%NetBSD.org@localhost>
date:      Fri Sep 11 10:33:32 2015 +0000

description:
If, for whatever reason, a local interface route is removed and then
re-added, mark it as a local route.

While here, if changing the route to go via the loopback interface
remove any inherited MTU value.

diffstat:

 sys/netinet/if_arp.c |  9 ++++++---
 sys/netinet6/nd6.c   |  6 ++++--
 2 files changed, 10 insertions(+), 5 deletions(-)

diffs (60 lines):

diff -r 2aab03b11aab -r 9bb2681a8705 sys/netinet/if_arp.c
--- a/sys/netinet/if_arp.c      Fri Sep 11 09:25:52 2015 +0000
+++ b/sys/netinet/if_arp.c      Fri Sep 11 10:33:32 2015 +0000
@@ -1,4 +1,4 @@
-/*     $NetBSD: if_arp.c,v 1.180 2015/09/09 01:24:01 ozaki-r Exp $     */
+/*     $NetBSD: if_arp.c,v 1.181 2015/09/11 10:33:32 roy Exp $ */
 
 /*-
  * Copyright (c) 1998, 2000, 2008 The NetBSD Foundation, Inc.
@@ -68,7 +68,7 @@
  */
 
 #include <sys/cdefs.h>
-__KERNEL_RCSID(0, "$NetBSD: if_arp.c,v 1.180 2015/09/09 01:24:01 ozaki-r Exp $");
+__KERNEL_RCSID(0, "$NetBSD: if_arp.c,v 1.181 2015/09/11 10:33:32 roy Exp $");
 
 #ifdef _KERNEL_OPT
 #include "opt_ddb.h"
@@ -641,8 +641,11 @@
                                panic("%s(%s): sockaddr_dl_init cannot fail",
                                    __func__, ifp->if_xname);
                        }
-                       if (useloopback)
+                       if (useloopback) {
                                ifp = rt->rt_ifp = lo0ifp;
+                               rt->rt_rmx.rmx_mtu = 0;
+                       }
+                       rt->rt_flags |= RTF_LOCAL;
                        /*
                         * make sure to set rt->rt_ifa to the interface
                         * address we are using, otherwise we will have trouble
diff -r 2aab03b11aab -r 9bb2681a8705 sys/netinet6/nd6.c
--- a/sys/netinet6/nd6.c        Fri Sep 11 09:25:52 2015 +0000
+++ b/sys/netinet6/nd6.c        Fri Sep 11 10:33:32 2015 +0000
@@ -1,4 +1,4 @@
-/*     $NetBSD: nd6.c,v 1.176 2015/09/04 05:33:23 ozaki-r Exp $        */
+/*     $NetBSD: nd6.c,v 1.177 2015/09/11 10:33:32 roy Exp $    */
 /*     $KAME: nd6.c,v 1.279 2002/06/08 11:16:51 itojun Exp $   */
 
 /*
@@ -31,7 +31,7 @@
  */
 
 #include <sys/cdefs.h>
-__KERNEL_RCSID(0, "$NetBSD: nd6.c,v 1.176 2015/09/04 05:33:23 ozaki-r Exp $");
+__KERNEL_RCSID(0, "$NetBSD: nd6.c,v 1.177 2015/09/11 10:33:32 roy Exp $");
 
 #ifdef _KERNEL_OPT
 #include "opt_net_mpsafe.h"
@@ -1478,8 +1478,10 @@
                                 */
                                if (ifa != rt->rt_ifa)
                                        rt_replace_ifa(rt, ifa);
+                               rt->rt_rmx.rmx_mtu = 0;
                                rt->rt_flags &= ~RTF_CLONED;
                        }
+                       rt->rt_flags |= RTF_LOCAL;
                } else if (rt->rt_flags & RTF_ANNOUNCE) {
                        nd6_llinfo_settimer(ln, -1);
                        ln->ln_state = ND6_LLINFO_REACHABLE;