tree 5eb085461cc417ca32fe7a8a13f52b231030be86
parent 8dcb20038ade81f9a87c024e7f12ec74f0e95f33
author Jouni Malinen <j@w1.fi> 1283013471 +0300
committer John W. Linville <linville@tuxdriver.com> 1285358068 -0400

mac80211: Add DS Parameter Set into Probe Request on 2.4 GHz

IEEE Std 802.11k-2008 added DS Parameter Set information element into
Probe Request frames as an optional information on 2.4 GHz band (and
mandatory, if radio measurements are enabled). This allows APs to
filter out Probe Request frames that may be received from neighboring
overlapping channels and by doing so, reduce the number of unnecessary
frames in the air. Make mac80211 add this IE into Probe Request frames
whenever the channel is known (i.e., whenever hwscan is not used).

Signed-off-by: Jouni Malinen <j@w1.fi>
Acked-by: Johannes Berg <johannes@sipsolutions.net>
Signed-off-by: John W. Linville <linville@tuxdriver.com>