check the error when checking if cidrs intersect

pkg/sdn/api/validation/validation.go

@@ -22,7 +22,10 @@ func SetDefaultClusterNetwork(cn sdnapi.ClusterNetwork) {
 
 //intersect tests two CIDR addresses to see if the first contains the second
 func intersect(cidr1, cidr2 string) bool {
-	_, net1, _ := net.ParseCIDR(cidr1)
+	_, net1, err := net.ParseCIDR(cidr1)
+	if err != nil {
+		return false
+	}
 	_, net2, err := net.ParseCIDR(cidr2)
 	if err != nil {
 		//cidr2 was not a cidr address which will be caught later

pkg/sdn/plugin/master.go

@@ -150,12 +150,6 @@ func (master *OsdnMaster) checkClusterNetworkAgainstClusterObjects() error {
 func clusterNetworkChanged(obj *osapi.ClusterNetwork, old *osapi.ClusterNetwork) (bool, error) {
 	changed := false
 
-	if !clusterDefEquals(old.ClusterNetworks, obj.ClusterNetworks) {
-		//KEYWORD
-		//Not sure what to do here...
-
-		//A valid change should be splitting a network into its smaller components
-	}
 
 	if old.Network != obj.Network {
 		changed = true
@@ -190,20 +184,3 @@ func clusterNetworkChanged(obj *osapi.ClusterNetwork, old *osapi.ClusterNetwork)
 
 	return changed, nil
 }
-
-func clusterDefEquals(obj, old []osapi.ClusterNetworkEntry) bool {
-	if obj == nil && old == nil {
-		//this should never happen
-		return true
-	}
-	if (obj == nil || old == nil) || (len(obj) != len(old)) {
-		//first case should never happen
-		return false
-	}
-	for i := range old {
-		if old[i] != obj[i] {
-			return false
-		}
-	}
-	return true
-}