Running DHCP once wpa_supplicant associates with an AP?

[Joe Emenaker <joe@emenaker.com>]

I think I've asked this before... either that or I searched and read a 
million other threads where they said "That can't be done, yet".

So, I'm trying to find out if it can be done.... *yet*.

All I want to do is have wpa_supplicant trigger a dhclient (or other 
dhcp client) for an interface when it associates with an AP. I've tried 
just putting the "iface eth1 inet dhcp" in /etc/network/interfaces, but 
that doesn't do it... and, last time I additionally put "auto eth1" in 
there, dhclient would try to run at boot time, before wpa_supplicant 
ran... and there'd be a long pause during the boot process while 
dhclient timed-out.

It seems like something that so many people would want to do. I just 
can't figure out how.

Any help?

- Joe