From b44bb860681d088bb487e60c736a548295801fb1 Mon Sep 17 00:00:00 2001
From: Mark Andrews <marka@isc.org>
Date: Thu, 9 Dec 2010 04:17:15 +0000
Subject: [PATCH] add comment

---
 lib/dns/dns64.c | 3 ++-
 1 file changed, 2 insertions(+), 1 deletion(-)

diff --git a/lib/dns/dns64.c b/lib/dns/dns64.c
index 7166fdf389..b0d502079e 100644
--- a/lib/dns/dns64.c
+++ b/lib/dns/dns64.c
@@ -14,7 +14,7 @@
  * PERFORMANCE OF THIS SOFTWARE.
  */
 
-/* $Id: dns64.c,v 1.4 2010/12/09 04:01:43 marka Exp $ */
+/* $Id: dns64.c,v 1.5 2010/12/09 04:17:15 marka Exp $ */
 
 #include <config.h>
 
@@ -169,6 +169,7 @@ dns_dns64_aaaafroma(const dns_dns64_t *dns64, const isc_netaddr_t *reqaddr,
 	INSIST(nbytes <= 12);
 	/* Copy prefix. */
 	memcpy(aaaa, dns64->bits, nbytes);
+	/* Bits 64-71 are zeros. draft-ietf-behave-address-format-04 */
 	if (nbytes == 8)
 		aaaa[nbytes++] = 0;
 	/* Copy mapped address. */