From 54f53e26637436aac08ddca298a4143ff892a60b Mon Sep 17 00:00:00 2001
From: Daniil Gentili <daniil@daniil.it>
Date: Tue, 14 May 2019 19:09:51 +0200
Subject: [PATCH] Support final dot for DNS names

---
 lib/functions.php | 6 ++++--
 1 file changed, 4 insertions(+), 2 deletions(-)

diff --git a/lib/functions.php b/lib/functions.php
index 1002e18..e649481 100644
--- a/lib/functions.php
+++ b/lib/functions.php
@@ -84,7 +84,7 @@ function isValidName(string $name)
  */
 function normalizeName(string $name): string
 {
-    static $pattern = '/^(?<name>[a-z0-9]([a-z0-9-_]{0,61}[a-z0-9])?)(\.(?&name))*$/i';
+    static $pattern = '/^(?<name>[a-z0-9]([a-z0-9-_]{0,61}[a-z0-9])?)(\.(?&name))*\.?$/i';
 
     if (\function_exists('idn_to_ascii') && \defined('INTL_IDNA_VARIANT_UTS46')) {
         if (false === $result = \idn_to_ascii($name, 0, \INTL_IDNA_VARIANT_UTS46)) {
@@ -102,6 +102,8 @@ function normalizeName(string $name): string
     if (isset($name[253]) || !\preg_match($pattern, $name)) {
         throw new InvalidNameException("Name '{$name}' is not a valid hostname.");
     }
-
+    if ($name[strlen($name)-1] === '.') {
+        $name = substr($name, 0, -1);
+    }
     return $name;
 }