autoconfigsrv - RC plugin to fetch DNS SRV records

Roundcube plugin to fetch DNS SRV records following RFC 6186 and 6764 for hosts and webdav. PR welcome.

Installation

Manual

1. Download, unzip, copy and rename master to 'autoconfigsrv' and paste it in 'plugins' directory of Roundcube installation.
2. Browse folder on terminal and run 'php composer.phar update' to download dependencies.
3. Update '/config/config.inc.php' to include plugin, and configure additional options as shown below.

Configuration

Edit config.inc.php file in /config directory:

<?php

// Enable plugin in config by adding the keyword to plugins array
$config['plugins'] = array('autoconfigsrv');

// Set default hosts to autoconfigsrv. Use both or either one.
$config['default_host'] = 'autoconfigsrv';
$config['smtp_server'] = 'autoconfigsrv';

// Set prefix for hosts; Default 'ssl'
$config['autoconfigsrv_imap_host_prefix'] = 'ssl';
$config['autoconfigsrv_smtp_host_prefix'] = 'tls';

// Set regex to whitelist hosts fetched from SRV records
$config['autoconfigsrv_host_regex'] = '(^[a-z0-9\.]*\.example\.com)$';

// Set true, to fetch SRV records from host domain's nameserver
$config['autoconfigsrv_use_authoritative_ns'] = false;

?>

RFC Guidelines

RFC 6186 - https://tools.ietf.org/html/rfc6186

RFC 6764 - https://tools.ietf.org/html/rfc6764

To Do

1. Change DNS library or update pear libray. (To make sure no DNS fetch requests fail)
2. Use weights and priorities to handle multiple entries (rfc2782)
3. To check whether host is a FQDN
4. Follow RFC to add pop3s and else