added superuser ips whitelist

core/validators/string.go

@@ -1,6 +1,7 @@
 package validators
 
 import (
+	"net/netip"
 	"regexp"
 
 	validation "github.com/go-ozzo/ozzo-validation/v4"
@@ -27,3 +28,30 @@ func IsRegex(value any) error {
 
 	return nil
 }
+
+// IPOrSubnet checks whether the validated value is an individual
+// IPv4/IPv6 or CIDR subnet.
+func IPOrSubnet(value any) error {
+	v, ok := value.(string)
+	if !ok {
+		return ErrUnsupportedValueType
+	}
+
+	if v == "" {
+		return nil // nothing to check
+	}
+
+	// subnet
+	_, err := netip.ParsePrefix(v)
+	if err == nil {
+		return nil
+	}
+
+	// individual IP
+	_, err = netip.ParseAddr(v)
+	if err == nil {
+		return nil
+	}
+
+	return validation.NewError("validation_invlaid_ip_or_subnet", "invalid IP or CIDR subnet")
+}