config wifi-device  wl0
        option type     broadcom
        option country  IT
        option channel  11
        option maxassoc 10

config wifi-iface
        option network  wifi
        option device   wl0
        option mode     ap
        option ssid     rete
        option hidden   0
        option encryption none

config wifi-iface
        option network  wifi2
        option device   wl0
        option mode     wds
        option ssid     rete2
        option addr     "00:14:BF:D2:63:75"

(the mac address isn't itself, it is the one of the other wds peer)