bridged with dhcpd on one interface only, how?

[Aras Vaichas <arasv@xxxxxxxxxxxxxxxxxxxxxxx>]

Hello,

I have an embedded device with 2 interfaces, eth0 and usb0. I need to provide a 
DHCP server on usb0 but not eth0. Also, I need to bridge eth0 and usb0, so the 
entire device has only one IP address that can be accessed by either (or both) 
interfaces.

Do I need to use ebtables, or can I use iptables with the -i option?

Thanks!

Aras Vaichas