allow edit of name + address

src/lib/Util.js

@@ -4,6 +4,19 @@ const childProcess = require('child_process');
 
 module.exports = class Util {
 
+  static isValidIPv4(str) {
+    const blocks = str.split('.');
+    if (blocks.length !== 4) return false;
+
+    for (let value of blocks) {
+      value = parseInt(value, 10);
+      if (Number.isNaN(value)) return false;
+      if (value < 0 || value > 255) return false;
+    }
+
+    return true;
+  }
+
   static promisify(fn) {
     // eslint-disable-next-line func-names
     return function(req, res) {