On Wednesday 21 March 2007 14:46, Johannes Berg wrote: > If the driver does not support radiotap, ieee80211_rx_monitor needs to > expand the head for each packet. Currently, this is also true, but since > currently no non-management frames are sent down the management > interface, this is not an issue. If each data packet needs to be first > reallocated though, it quickly becomes a problem for low-power embedded > access points running hostapd. > That's why drivers should be modified to support radiotap. > Additionally, the overhead of tacking on radiotap headers to each > received frame is also rather high if you're only interested in > receiving the information for management frames. > It's really not that much overhead. -Michael Wu
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