Merge pull request #193 from krhubert/v8

add cidr, cidrv4 and cidrv6 validators

Author: Dean Karn

baked_in.go

@@ -81,6 +81,9 @@ var bakedInValidators = map[string]Func{
 	"ipv4":         isIPv4,
 	"ipv6":         isIPv6,
 	"ip":           isIP,
+	"cidrv4":       isCIDRv4,
+	"cidrv6":       isCIDRv6,
+	"cidr":         isCIDR,
 	"mac":          isMac,
 }
 
@@ -89,6 +92,27 @@ func isMac(v *Validate, topStruct reflect.Value, currentStructOrField reflect.Va
 	return err == nil
 }
 
+func isCIDRv4(v *Validate, topStruct reflect.Value, currentStructOrField reflect.Value, field reflect.Value, fieldType reflect.Type, fieldKind reflect.Kind, param string) bool {
+
+	ip, _, err := net.ParseCIDR(field.String())
+
+	return err == nil && ip.To4() != nil
+}
+
+func isCIDRv6(v *Validate, topStruct reflect.Value, currentStructOrField reflect.Value, field reflect.Value, fieldType reflect.Type, fieldKind reflect.Kind, param string) bool {
+
+	ip, _, err := net.ParseCIDR(field.String())
+
+	return err == nil && ip.To4() == nil
+}
+
+func isCIDR(v *Validate, topStruct reflect.Value, currentStructOrField reflect.Value, field reflect.Value, fieldType reflect.Type, fieldKind reflect.Kind, param string) bool {
+
+	_, _, err := net.ParseCIDR(field.String())
+
+	return err == nil
+}
+
 func isIPv4(v *Validate, topStruct reflect.Value, currentStructOrField reflect.Value, field reflect.Value, fieldType reflect.Type, fieldKind reflect.Kind, param string) bool {
 
 	ip := net.ParseIP(field.String())

doc.go

@@ -452,6 +452,18 @@ Here is a list of the current built in validators:
 		This validates that a string value contains a valid v6 IP Adress.
 		(Usage: ipv6)
 
+	cidr
+		This validates that a string value contains a valid CIDR  Adress.
+		(Usage: cidr)
+
+	cidrv4
+		This validates that a string value contains a valid v4 CIDR Adress.
+		(Usage: cidrv4)
+
+	cidrv6
+		This validates that a string value contains a valid v6 CIDR Adress.
+		(Usage: cidrv6)
+
 	mac
 		This validates that a string value contains a valid MAC Adress defined
 		by go's ParseMAC accepted formats and types see:

validator_test.go

@@ -1542,6 +1542,129 @@ func TestIPv4Validation(t *testing.T) {
 	}
 }
 
+func TestCIDRValidation(t *testing.T) {
+	tests := []struct {
+		param    string
+		expected bool
+	}{
+		{"10.0.0.0/0", true},
+		{"10.0.0.1/8", true},
+		{"172.16.0.1/16", true},
+		{"192.168.0.1/24", true},
+		{"192.168.255.254/24", true},
+		{"192.168.255.254/48", false},
+		{"192.168.255.256/24", false},
+		{"172.16.255.254/16", true},
+		{"172.16.256.255/16", false},
+		{"2001:cdba:0000:0000:0000:0000:3257:9652/64", true},
+		{"2001:cdba:0000:0000:0000:0000:3257:9652/256", false},
+		{"2001:cdba:0:0:0:0:3257:9652/32", true},
+		{"2001:cdba::3257:9652/16", true},
+	}
+
+	for i, test := range tests {
+
+		errs := validate.Field(test.param, "cidr")
+
+		if test.expected == true {
+			if !IsEqual(errs, nil) {
+				t.Fatalf("Index: %d cidr failed Error: %s", i, errs)
+			}
+		} else {
+			if IsEqual(errs, nil) {
+				t.Fatalf("Index: %d cidr failed Error: %s", i, errs)
+			} else {
+				val := errs.(ValidationErrors)[""]
+				if val.Tag != "cidr" {
+					t.Fatalf("Index: %d cidr failed Error: %s", i, errs)
+				}
+			}
+		}
+	}
+}
+
+func TestCIDRv6Validation(t *testing.T) {
+	tests := []struct {
+		param    string
+		expected bool
+	}{
+		{"10.0.0.0/0", false},
+		{"10.0.0.1/8", false},
+		{"172.16.0.1/16", false},
+		{"192.168.0.1/24", false},
+		{"192.168.255.254/24", false},
+		{"192.168.255.254/48", false},
+		{"192.168.255.256/24", false},
+		{"172.16.255.254/16", false},
+		{"172.16.256.255/16", false},
+		{"2001:cdba:0000:0000:0000:0000:3257:9652/64", true},
+		{"2001:cdba:0000:0000:0000:0000:3257:9652/256", false},
+		{"2001:cdba:0:0:0:0:3257:9652/32", true},
+		{"2001:cdba::3257:9652/16", true},
+	}
+
+	for i, test := range tests {
+
+		errs := validate.Field(test.param, "cidrv6")
+
+		if test.expected == true {
+			if !IsEqual(errs, nil) {
+				t.Fatalf("Index: %d cidrv6 failed Error: %s", i, errs)
+			}
+		} else {
+			if IsEqual(errs, nil) {
+				t.Fatalf("Index: %d cidrv6 failed Error: %s", i, errs)
+			} else {
+				val := errs.(ValidationErrors)[""]
+				if val.Tag != "cidrv6" {
+					t.Fatalf("Index: %d cidrv6 failed Error: %s", i, errs)
+				}
+			}
+		}
+	}
+}
+
+func TestCIDRv4Validation(t *testing.T) {
+	tests := []struct {
+		param    string
+		expected bool
+	}{
+		{"10.0.0.0/0", true},
+		{"10.0.0.1/8", true},
+		{"172.16.0.1/16", true},
+		{"192.168.0.1/24", true},
+		{"192.168.255.254/24", true},
+		{"192.168.255.254/48", false},
+		{"192.168.255.256/24", false},
+		{"172.16.255.254/16", true},
+		{"172.16.256.255/16", false},
+		{"2001:cdba:0000:0000:0000:0000:3257:9652/64", false},
+		{"2001:cdba:0000:0000:0000:0000:3257:9652/256", false},
+		{"2001:cdba:0:0:0:0:3257:9652/32", false},
+		{"2001:cdba::3257:9652/16", false},
+	}
+
+	for i, test := range tests {
+
+		errs := validate.Field(test.param, "cidrv4")
+
+		if test.expected == true {
+			if !IsEqual(errs, nil) {
+				t.Fatalf("Index: %d cidrv4 failed Error: %s", i, errs)
+			}
+		} else {
+			if IsEqual(errs, nil) {
+				t.Fatalf("Index: %d cidrv4 failed Error: %s", i, errs)
+			} else {
+				val := errs.(ValidationErrors)[""]
+				if val.Tag != "cidrv4" {
+					t.Fatalf("Index: %d cidrv4 failed Error: %s", i, errs)
+				}
+			}
+		}
+	}
+}
+
 func TestSliceMapArrayChanFuncPtrInterfaceRequiredValidation(t *testing.T) {
 
 	var m map[string]string