• Daniel Drake's avatar
    [PATCH] mac80211: improved 802.11g CTS protection · 63fc33ce
    Daniel Drake authored
    Currently, CTS protection is partially implemented twice:
     1. via prism2 ioctls, only used by hostapd
     2. via STA beacon parsing, recorded in sta.use_protection but never used
        (other than printed in debugfs)
    Protection control should be implemented on a per-subif basis. For example,
    a single physical device may be running a soft AP on one channel, and a STA
    on another. The AP interface should use protection based on what hostapd told
    it, and the STA interface should use protection based on beacon parsing.
    These should operate independantly: one subif using protection should not
    influence the other.
    To implement this, I moved the use_protection flag into ieee80211_sub_if_data
    and removed the device-global cts_protect_erp_frames flag.
    I also made the PRISM2_PARAM_CTS_PROTECT_ERP_FRAMES write operation only
    available for AP interfaces, to avoid any possibility of the user messing with
    the behaviour of a STA.
    Signed-off-by: default avatarDaniel Drake <dsd@gentoo.org>
    Signed-off-by: default avatarJiri Benc <jbenc@suse.cz>
    Signed-off-by: default avatarJohn W. Linville <linville@tuxdriver.com>
ieee80211_sta.c 83.8 KB