IPv6 addresses in configuration is not parsed, and result in an error

[rpc-scandinavia]

Prerequisites

• I have searched for duplicate or closed issues
• I can recreate the issue with all plugins disabled

Describe the issue

I am testing the new RCM and configure SQL using an IPv6 address like [fd00:3::10], but RCM can't parse those and fails with the Oops screen.

This is configured in config.inc.php for SQL:

$config['db_dsnw'] = 'mysql://user:pass@[fd00:3::11]/roundcubemail';

And I think the error is with this code in /usr/local/lib/roundcubemail/program/lib/Roundcube/rcube_db.php in the parse_dsn method:

        // Find protocol and hostspec
        // $dsn => proto(proto_opts)/database
        if (preg_match('|^([^(]+)\((.*?)\)/?(.*?)$|', $dsn, $match)) {
            $proto = $match[1];
            $proto_opts = $match[2] ?: false;
            $dsn = $match[3];
        }
        // $dsn => protocol+hostspec/database (old format)
        else {
            if (strpos($dsn, '+') !== false) {
                [$proto, $dsn] = explode('+', $dsn, 2);
            }
            if (strpos($dsn, '/') !== false) {
                [$proto_opts, $dsn] = explode('/', $dsn, 2);
            } else {
                $proto_opts = $dsn;
                $dsn = null;
            }
        }

        // process the different protocol options
        $parsed['protocol'] = !empty($proto) ? $proto : 'tcp';
        $proto_opts = rawurldecode($proto_opts);
        if (strpos($proto_opts, ':') !== false) {
            [$proto_opts, $parsed['port']] = explode(':', $proto_opts);
        }
        if ($parsed['protocol'] == 'tcp' && strlen($proto_opts)) {
            $parsed['hostspec'] = $proto_opts;
        } elseif ($parsed['protocol'] == 'unix') {
            $parsed['socket'] = $proto_opts;
        }

It seems that IPv6 probably only fails with SQL.
I confirmed that it is okay in password.inc.php like:

$config['password_ldap_host'] = '[fd00:3::10]';

And in config.inc.php like:

$config['smtp_host'] = '[fd00:3::12]:25';

Perhaps the SQL address should be split up in several settings like:

$config['db_engine'] = 'mariadb';
$config['db_host'] = '[fd00:3::10]';
$config['db_port'] = 3306;
$config['db_user'] = 'user';
$config['db_pass'] = 'user';
$config['db_options'] = '';
$config['db_readwrite'] = true;

What browser(s) are you seeing the problem on?

Firefox

What version of PHP are you using?

8.4.10

What version of Roundcube are you using?

1.7 Beta

JavaScript errors

No response

PHP errors

[22-Jul-2025 23:17:23 +0000]: <9d1a9a92> DB Error: SQLSTATE[HY000] [2002] Failed to parse IPv6 address "[fd00:3" in /usr/local/lib/roundcubemail/program/lib/Roundcube/rcube_db.php on line 188 (GET /?_task=logout&_token=HOCGV5mlC8CryJ1mzYRBy9NWF0IM0tZy)

[alecpl]

Fixed.

[rpc-scandinavia]

I am testing RCM version 1.7 RC4, and this bug is introduces again (also in RC 3).
The first connection string don't work, the second connection string does work.

$config['db_dsnw'] = 'pgsql://user:password@[fd00:3::11]/roundcubemail';
$config['db_dsnw'] = 'pgsql://user:password@10.10.3.11/roundcubemail';