+ client: handle per-client settings

client/src/helpers/form.js

@@ -1,7 +1,7 @@
 import React, { Fragment } from 'react';
 import { Trans } from 'react-i18next';
 
-import { R_IPV4, UNSAFE_PORTS } from '../helpers/constants';
+import { R_IPV4, R_MAC, UNSAFE_PORTS } from '../helpers/constants';
 
 export const renderField = ({
     input, id, className, placeholder, type, disabled, meta: { touched, error },
@@ -55,6 +55,13 @@ export const ipv4 = (value) => {
     return false;
 };
 
+export const mac = (value) => {
+    if (value && !new RegExp(R_MAC).test(value)) {
+        return <Trans>form_error_mac_format</Trans>;
+    }
+    return false;
+};
+
 export const isPositive = (value) => {
     if ((value || value === 0) && (value <= 0)) {
         return <Trans>form_error_positive</Trans>;