(wwww is a wireless connection)
(---- is a ethernet connection)

                                     +www [Laptop]
                                     +
[DSL Modem] --- [OpenWRT AP/Router] wwwww [Wifi bridge] -+--- [PC]
                                                         |--- [OSD]

Laptop = 192.168.1.111
PC = 192.168.1.44
OSD = 192.168.1.100
OpenWrt = 192.168.1.1 or 192.168.2.55
DSL Modem = 192.168.2.254

PC can access DSL,OpenWrt,OSD
Laptop can access DSL,OpenWrt
OSD can access PC