From c0c1086c51e1abfc991de11e3d687a60240d2df8 Mon Sep 17 00:00:00 2001
From: Steven Barth <steven@midlink.org>
Date: Thu, 7 Aug 2014 07:51:29 +0200
Subject: [PATCH] ra: don't send MSR for /64 prefix if DP is /64 as well

---
 src/router.c | 3 ++-
 1 file changed, 2 insertions(+), 1 deletion(-)

diff --git a/src/router.c b/src/router.c
index f8ba5d7..a45a8cb 100644
--- a/src/router.c
+++ b/src/router.c
@@ -410,7 +410,8 @@ static void send_router_advert(struct uloop_timeout *event)
 
 	for (ssize_t i = 0; i < ipcnt; ++i) {
 		struct odhcpd_ipaddr *addr = &addrs[i];
-		if (addr->dprefix > 64 || addr->dprefix == 0) {
+		if (addr->dprefix > 64 || addr->dprefix == 0 ||
+				(addr->dprefix == 64 && addr->prefix == 64)) {
 			continue; // Address not suitable
 		} else if (addr->dprefix > 32) {
 			addr->addr.s6_addr32[1] &= htonl(~((1U << (64 - addr->dprefix)) - 1));
-- 
2.30.2