[src/trunk]: src/sys/netinet6 print mapped addresses better

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

details:   https://anonhg.NetBSD.org/src/rev/493041406af9
branches:  trunk
changeset: 333290:493041406af9
user:      christos <christos%NetBSD.org@localhost>
date:      Mon Oct 27 14:10:12 2014 +0000

description:
print mapped addresses better

diffstat:

 sys/netinet6/in6.c |  10 ++++++++--
 1 files changed, 8 insertions(+), 2 deletions(-)

diffs (31 lines):

diff -r e6ca815474a5 -r 493041406af9 sys/netinet6/in6.c
--- a/sys/netinet6/in6.c        Mon Oct 27 12:50:41 2014 +0000
+++ b/sys/netinet6/in6.c        Mon Oct 27 14:10:12 2014 +0000
@@ -1,4 +1,4 @@
-/*     $NetBSD: in6.c,v 1.177 2014/10/20 14:50:09 roy Exp $    */
+/*     $NetBSD: in6.c,v 1.178 2014/10/27 14:10:12 christos 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 1.177 2014/10/20 14:50:09 roy Exp $");
+__KERNEL_RCSID(0, "$NetBSD: in6.c,v 1.178 2014/10/27 14:10:12 christos Exp $");
 
 #include "opt_inet.h"
 #include "opt_compat_netbsd.h"
@@ -1888,6 +1888,12 @@
        ip6round = (ip6round + 1) & 7;
        cp = ip6buf[ip6round];
 
+       if (IN6_IS_ADDR_V4MAPPED(addr)) {
+               struct in_addr ia = { .s_addr = addr->s6_addr32[3] };
+               snprintf(cp, 48, "::ffff:%s", inet_ntoa(ia));
+               return cp;
+       }
+
        for (i = 0; i < 8; i++) {
                if (dcolon == 1) {
                        if (*a == 0) {