• Jouni Malinen's avatar
    cfg80211: Store IEs from both Beacon and Probe Response frames · 34a6eddb
    Jouni Malinen authored
    
    
    Store information elements from Beacon and Probe Response frames in
    separate buffers to allow both sets to be made available through
    nl80211. This allows user space applications to get access to IEs from
    Beacon frames even if we have received Probe Response frames from the
    BSS. Previously, the IEs from Probe Response frames would have
    overridden the IEs from Beacon frames.
    
    This feature is of somewhat limited use since most protocols include
    the same (or extended) information in Probe Response frames. However,
    there are couple of exceptions where the IEs from Beacon frames could
    be of some use: TIM IE is only included in Beacon frames (and it would
    be needed to figure out the DTIM period used in the BSS) and at least
    some implementations of Wireless Provisioning Services seem to include
    the full IE only in Beacon frames).
    
    The new BSS attribute for scan results is added to allow both the IE
    sets to be delivered. This is done in a way that maintains the
    previously used behavior for applications that are not aware of the
    new NL80211_BSS_BEACON_IES attribute.
    Signed-off-by: default avatarJouni Malinen <j@w1.fi>
    Acked-by: default avatarJohannes Berg <johannes@sipsolutions.net>
    Signed-off-by: default avatarJohn W. Linville <linville@tuxdriver.com>
    34a6eddb
cfg80211.h 71.5 KB