See these three threads:
  * http://forum.openwrt.org/viewtopic.php?pid=6626#p6626
  * http://lists.osdl.org/pipermail/bridge/2004-September/000626.html
  * http://prism54.org/punbb/viewtopic.php?pid=3917

In conclusion, you can't bridge wired and wireless interfaces in Managed Mode because 802.11 doesn't allow the wireless interface to send packets with a source address differing from it's own. But Master mode works fine.

Well, with MadWifi you can, apparently (but only if you run MadWifi on both the station and the AP).

See: [[http://madwifi-project.org/wiki/UserDocs/TransparentBridge]]

The trick is to make the station and AP use 4-address frame headers. 

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