feat(BREAKING): Disable validation of cidripv4 when ip is not the begining of the block

baked_in.go

@@ -332,9 +332,9 @@ func isMAC(fl FieldLevel) bool {
 
 // isCIDRv4 is the validation function for validating if the field's value is a valid v4 CIDR address.
 func isCIDRv4(fl FieldLevel) bool {
-	ip, _, err := net.ParseCIDR(fl.Field().String())
+	ip, net, err := net.ParseCIDR(fl.Field().String())
 
-	return err == nil && ip.To4() != nil
+	return err == nil && ip.To4() != nil && net.IP.Equal(ip)
 }
 
 // isCIDRv6 is the validation function for validating if the field's value is a valid v6 CIDR address.

validator_test.go

@@ -2564,19 +2564,26 @@ func TestCIDRv4Validation(t *testing.T) {
 		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},
+		{"0.0.0.0/0", true},
+		{"10.0.0.0/0", false},
+		{"10.0.0.0/8", true},
+		{"10.0.0.1/8", false},
+		{"172.16.0.0/16", true},
+		{"172.16.0.1/16", false},
+		{"192.168.0.0/24", true},
+		{"192.168.0.1/24", false},
+		{"192.168.255.0/24", true},
+		{"192.168.255.254/24", false},
 		{"192.168.255.254/48", false},
 		{"192.168.255.256/24", false},
-		{"172.16.255.254/16", true},
+		{"172.16.0.0/16", true},
+		{"172.16.255.254/16", false},
 		{"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},
+		{"172.56.1.0/16", false},
 	}
 
 	validate := New()
@@ -12264,25 +12271,25 @@ func TestCreditCardFormatValidation(t *testing.T) {
 }
 
 func TestMultiOrOperatorGroup(t *testing.T) {
- 	tests := []struct {
- 		Value    int `validate:"eq=1|gte=5,eq=1|lt=7"`
- 		expected bool
- 	}{
- 		{1, true}, {2, false}, {5, true}, {6, true}, {8, false},
- 	}
-
- 	validate := New()
-
- 	for i, test := range tests {
- 		errs := validate.Struct(test)
- 		if test.expected {
- 			if !IsEqual(errs, nil) {
- 				t.Fatalf("Index: %d multi_group_of_OR_operators failed Error: %s", i, errs)
- 			}
- 		} else {
- 			if IsEqual(errs, nil) {
- 				t.Fatalf("Index: %d multi_group_of_OR_operators should have errs", i)
- 			}
- 		}
- 	}
- }
+	tests := []struct {
+		Value    int `validate:"eq=1|gte=5,eq=1|lt=7"`
+		expected bool
+	}{
+		{1, true}, {2, false}, {5, true}, {6, true}, {8, false},
+	}
+
+	validate := New()
+
+	for i, test := range tests {
+		errs := validate.Struct(test)
+		if test.expected {
+			if !IsEqual(errs, nil) {
+				t.Fatalf("Index: %d multi_group_of_OR_operators failed Error: %s", i, errs)
+			}
+		} else {
+			if IsEqual(errs, nil) {
+				t.Fatalf("Index: %d multi_group_of_OR_operators should have errs", i)
+			}
+		}
+	}
+}