From: Ulrich Weber <uweber.linux@gmail.com>
Date: Mon, 5 Jan 2015 14:58:34 +0000 (+0100)
Subject: firewall3: fix left shift on 64 bit systems in fw3_bitlen2netmask
X-Git-Url: http://git.archive.openwrt.org/?p=project%2Ffirewall3.git;a=commitdiff_plain;h=c03e20d7f594058ff223f30cf34de1b5e8210b8d;hp=b59934331c4b9271ceb5e30b793a552618299d39

firewall3: fix left shift on 64 bit systems in fw3_bitlen2netmask

otherwise 0.0.0.0/0 is set as 0.0.0.0/255.255.255.255 on x86_64

Signed-off-by: Ulrich Weber <uw@ocedo.com>
---

diff --git a/utils.c b/utils.c
index 71a0f13..b2fbe02 100644
--- a/utils.c
+++ b/utils.c
@@ -803,7 +803,7 @@ fw3_bitlen2netmask(int family, int bits, void *mask)
 			return false;
 
 		v4 = mask;
-		v4->s_addr = htonl(~((1 << (32 - abs(bits))) - 1));
+		v4->s_addr = bits ? htonl(~((1 << (32 - abs(bits))) - 1)) : 0;
 
 		if (bits < 0)
 			v4->s_addr = ~v4->s_addr;