Why ebt_dnat.c doesn't need to re-search fdb after changing dmac?

Hi List,
         As the subject stated, I didn't find the clue. If we add dnat
into NF_BR_LOCAL_OUT, and change the destination mac of our locally
generated packets. In theory , we need to re-search the fdb hash with
new dmac as parameter,  in order to get the right bridge port to send
packets out.
        But I can't find the re-search action, or did I missed something ?




regards,
Yi