[src/trunk]: src/sys/net Clean up rtcache_setdst

[ozaki-r <ozaki-r%NetBSD.org@localhost>]

details:   https://anonhg.NetBSD.org/src/rev/73c1bfb3f291
branches:  trunk
changeset: 807366:73c1bfb3f291
user:      ozaki-r <ozaki-r%NetBSD.org@localhost>
date:      Tue Apr 07 04:36:19 2015 +0000

description:
Clean up rtcache_setdst

We can assume sockaddr_copy never return NULL when we pass
non-NULL dst (1st argument).

diffstat:

 sys/net/route.c |  21 +++++++++++----------
 1 files changed, 11 insertions(+), 10 deletions(-)

diffs (43 lines):

diff -r eb0bd2249ec8 -r 73c1bfb3f291 sys/net/route.c
--- a/sys/net/route.c   Tue Apr 07 03:19:24 2015 +0000
+++ b/sys/net/route.c   Tue Apr 07 04:36:19 2015 +0000
@@ -1,4 +1,4 @@
-/*     $NetBSD: route.c,v 1.141 2015/04/06 08:39:06 ozaki-r Exp $      */
+/*     $NetBSD: route.c,v 1.142 2015/04/07 04:36:19 ozaki-r Exp $      */
 
 /*-
  * Copyright (c) 1998, 2008 The NetBSD Foundation, Inc.
@@ -94,7 +94,7 @@
 #include "opt_route.h"
 
 #include <sys/cdefs.h>
-__KERNEL_RCSID(0, "$NetBSD: route.c,v 1.141 2015/04/06 08:39:06 ozaki-r Exp $");
+__KERNEL_RCSID(0, "$NetBSD: route.c,v 1.142 2015/04/07 04:36:19 ozaki-r Exp $");
 
 #include <sys/param.h>
 #ifdef RTFLUSH_DEBUG
@@ -1468,15 +1468,16 @@
        KASSERT(sa != NULL);
 
        rtcache_invariants(ro);
-       if (ro->ro_sa != NULL && ro->ro_sa->sa_family == sa->sa_family) {
-               rtcache_clear(ro);
-               if (sockaddr_copy(ro->ro_sa, ro->ro_sa->sa_len, sa) != NULL) {
-                       rtcache_invariants(ro);
-                       return 0;
+       if (ro->ro_sa != NULL) {
+               if (ro->ro_sa->sa_family == sa->sa_family) {
+                       rtcache_clear(ro);
+                       sockaddr_copy(ro->ro_sa, ro->ro_sa->sa_len, sa);
+                       sockaddr_free(ro->ro_sa);
+               } else {
+                       /* free ro_sa, wrong family */
+                       rtcache_free(ro);
                }
-               sockaddr_free(ro->ro_sa);
-       } else if (ro->ro_sa != NULL)
-               rtcache_free(ro);       /* free ro_sa, wrong family */
+       }
 
        KASSERT(ro->_ro_rt == NULL);