xref: /plugin/smtp/helper.php (revision 2d25f6d579c596d0968919bfd120a4d8583deecf) 
1<?php
2
3use dokuwiki\Extension\Plugin;
4
5/**
6 * DokuWiki Plugin smtp (Helper Component)
7 *
8 * @license GPL 2 http://www.gnu.org/licenses/gpl-2.0.html
9 * @author  Andreas Gohr <andi@splitbrain.org>
10 */
11class helper_plugin_smtp extends Plugin
12{
13    /**
14     * Return a string usable as EHLO message
15     *
16     * @param string $ehlo configured EHLO (overrides automatic detection)
17     * @return string
18     */
19    public static function getEHLO($ehlo = '')
20    {
21        global $INPUT;
22        if (empty($ehlo)) {
23            $ip = $INPUT->server->str('SERVER_ADDR');
24            if (empty($ip)) {
25                return "localhost.localdomain";
26            }
27
28            // Indicate IPv6 address according to RFC 2821, if applicable.
29            $colonPos = strpos($ip, ':');
30            if ($colonPos !== false) {
31                $ip = 'IPv6:' . $ip;
32            }
33
34            return "[" . $ip . "]";
35        }
36        return $ehlo;
37    }
38}
39