Symfony2 Routing - route subdomains

Is there a way to set up hostname based routing in Symfony2?

I didn't find anything about this topic in the official documentation.
http://symfony.com/doc/2.0/book/routing.html

I want to route the request based on the given hostname:
foo.example.com
bar.example.com
{{subdomain}}.example.com

So in essence, the controller would get the current subdomain passed as a parameter.

Similar to the Zend solution:
http://framework.zend.com/manual/en/zend.controller.router.html#zend.controller.router.routes.hostname

$hostnameRoute = new Zend_Controller_Router_Route_Hostname(
    ':username.users.example.com',
    array(
        'controller' => 'profile',
        'action'     => 'userinfo'
    )
);
$plainPathRoute = new Zend_Controller_Router_Route_Static('');

$router->addRoute('user', $hostnameRoute->chain($plainPathRoute));

I hope that it's possible and I just missed it somehow.
Thanks in advance!