drop AAAA reply with IPv4 mapped address. sync w/kame

draft-itojun-v6ops-v4mapped-harmful-00.txt

1 files changed, 9 insertions, 1 deletions

diff --git a/src/lib/libc/net/gethostnamadr.c b/src/lib/libc/net/gethostnamadr.c
index 423fb906b8..3ac5049e72 100644
--- a/src/lib/libc/net/gethostnamadr.c
+++ b/src/lib/libc/net/gethostnamadr.c
@@ -52,7 +52,7 @@
  */
 
 #if defined(LIBC_SCCS) && !defined(lint)
-static char rcsid[] = "$OpenBSD: gethostnamadr.c,v 1.51 2002/07/30 00:45:19 deraadt Exp $";
+static char rcsid[] = "$OpenBSD: gethostnamadr.c,v 1.52 2002/08/22 16:35:37 itojun Exp $";
 #endif /* LIBC_SCCS and not lint */
 
 #include <sys/param.h>
@@ -363,6 +363,14 @@ getanswer(answer, anslen, qname, qtype)
                                 cp += n;
                                 continue;
                         }
+                        if (type == T_AAAA) {
+                                struct in6_addr in6;
+                                memcpy(&in6, cp, IN6ADDRSZ);
+                                if (IN6_IS_ADDR_V4MAPPED(&in6)) {
+                                        cp += n;
+                                        continue;
+                                }
+                        }
                         if (!haveanswer) {
                                 register int nn;