Please note that diffs are not public domain; they are subject to the
copyright notices on the relevant files.

===================================================================
RCS file: /ftp/cvs/cvsroot/src/sys/netinet6/ip6_input.c,v
rcsdiff: /ftp/cvs/cvsroot/src/sys/netinet6/ip6_input.c,v: warning: Unknown phrases like `commitid ...;' are present.
retrieving revision 1.22
retrieving revision 1.22.2.1
diff -u -p -r1.22 -r1.22.2.1
--- src/sys/netinet6/ip6_input.c	2000/06/13 14:43:44	1.22
+++ src/sys/netinet6/ip6_input.c	2000/07/03 22:48:19	1.22.2.1
@@ -1,5 +1,5 @@
-/*	$NetBSD: ip6_input.c,v 1.22 2000/06/13 14:43:44 itojun Exp $	*/
-/*	$KAME: ip6_input.c,v 1.94 2000/06/13 10:06:19 jinmei Exp $	*/
+/*	$NetBSD: ip6_input.c,v 1.22.2.1 2000/07/03 22:48:19 thorpej Exp $	*/
+/*	$KAME: ip6_input.c,v 1.95 2000/07/02 07:49:37 jinmei Exp $	*/
 
 /*
  * Copyright (C) 1995, 1996, 1997, and 1998 WIDE Project.
@@ -488,16 +488,25 @@ ip6_input(m)
 	    ip6_forward_rt.ro_rt->rt_ifp->if_type == IFT_LOOP) {
 		struct in6_ifaddr *ia6 =
 			(struct in6_ifaddr *)ip6_forward_rt.ro_rt->rt_ifa;
-		/* packet to tentative address must not be received */
 		if (ia6->ia6_flags & IN6_IFF_ANYCAST)
 			m->m_flags |= M_ANYCAST6;
+		/*
+		 * packets to a tentative, duplicated, or somehow invalid
+		 * address must not be accepted.
+		 */
 		if (!(ia6->ia6_flags & IN6_IFF_NOTREADY)) {
-			/* this interface is ready */
+			/* this address is ready */
 			ours = 1;
 			deliverifp = ia6->ia_ifp;	/* correct? */
 			goto hbhcheck;
 		} else {
-			/* this interface is not ready, fall through */
+			/* address is not ready, so discard the packet. */
+			log(LOG_INFO,
+			    "ip6_input: packet to an unready address %s->%s",
+			    ip6_sprintf(&ip6->ip6_src),
+			    ip6_sprintf(&ip6->ip6_dst));
+
+			goto bad;
 		}
 	}