carp and dead daemon

[manu%netbsd.org@localhost (Emmanuel Dreyfus)]

Hello

CARP is nice for load ballancing firewalls, but for servers, there is a
small concern: if a daemon dies, the machine still answers ARP on the
shared address, but it will refuse service requests.

Is there an efficient way to automatically shutdown carp interfaces when
a daemon dies or a TCP port quits the LISTEN state? I mean without
polling the service. It seems kqueue can give the info, but is there a
tool for using it?

-- 
Emmanuel Dreyfus
http://hcpnet.free.fr/pubz
manu%netbsd.org@localhost