Merge pull request #152 from joostlawerman/master

Add IsCIDR check

validator.go

@@ -496,6 +496,12 @@ func IsIPv6(str string) bool {
 	return ip != nil && strings.Contains(str, ":")
 }
 
+// IsCIDR check if the string is an valid CIDR notiation (IPV4 & IPV6)
+func IsCIDR(str string) bool {
+	_, _, err := net.ParseCIDR(str)
+	return err == nil
+}
+
 // IsMAC check if a string is valid MAC address.
 // Possible MAC formats:
 // 01:23:45:67:89:ab

validator_test.go

@@ -2387,3 +2387,25 @@ func ExampleValidateStruct() {
 	}
 	println(result)
 }
+
+func TestIsCIDR(t *testing.T) {
+	t.Parallel()
+
+	var tests = []struct {
+		param    string
+		expected bool
+	}{
+		{"193.168.3.20/7", true},
+		{"2001:db8::/32", true},
+		{"2001:0db8:85a3:0000:0000:8a2e:0370:7334/64", true},
+		{"193.138.3.20/60", false},
+		{"500.323.2.23/43", false},
+		{"", false},
+	}
+	for _, test := range tests {
+		actual := IsCIDR(test.param)
+		if actual != test.expected {
+			t.Errorf("Expected IsCIDR(%q) to be %v, got %v", test.param, test.expected, actual)
+		}
+	}
+}