From 07b1b244d60aea19795cc3d206910d63bdddbdba Mon Sep 17 00:00:00 2001
From: vishalnayak <vishalnayakv@gmail.com>
Date: Wed, 21 Sep 2016 20:29:33 -0400
Subject: [PATCH] Use net.IPv4zero to check for zero address

---
 helper/cidrutil/cidr.go | 4 ++--
 1 file changed, 2 insertions(+), 2 deletions(-)

diff --git a/helper/cidrutil/cidr.go b/helper/cidrutil/cidr.go
index 7b3dfbcf1..d5ab477f0 100644
--- a/helper/cidrutil/cidr.go
+++ b/helper/cidrutil/cidr.go
@@ -130,7 +130,7 @@ func Subset(cidr1, cidr2 string) (bool, error) {
 	}
 
 	maskLen1, _ := net1.Mask.Size()
-	if ip1.To4().String() != "0.0.0.0" && maskLen1 == 0 {
+	if ip1.To4().Equal(net.IPv4zero) && maskLen1 == 0 {
 		return false, fmt.Errorf("CIDR to be checked against is not in its canonical form")
 	}
 
@@ -140,7 +140,7 @@ func Subset(cidr1, cidr2 string) (bool, error) {
 	}
 
 	maskLen2, _ := net2.Mask.Size()
-	if ip2.To4().String() != "0.0.0.0" && maskLen2 == 0 {
+	if ip2.To4().Equal(net.IPv4zero) && maskLen2 == 0 {
 		return false, fmt.Errorf("CIDR that needs to be checked is not in its canonical form")
 	}