• Johannes Berg's avatar
    mac80211: reply only once to each PS-poll · deeaee19
    Johannes Berg authored
    If a PS-poll frame is retried (but was received)
    there is no way to detect that since it has no
    sequence number. As a consequence, the standard
    asks us to not react to PS-poll frames until the
    response to one made it out (was ACKed or lost).
    
    Implement this by using the WLAN_STA_SP flags to
    also indicate a PS-Poll "service period" and the
    IEEE80211_TX_STATUS_EOSP flag for the response
    packet to indicate the end of the "SP" as usual.
    
    We could use separate flags, but that will most
    likely completely confuse drivers, and while the
    standard doesn't exclude simultaneously polling
    using uAPSD and PS-Poll, doing that seems quite
    problematic.
    Signed-off-by: default avatarJohannes Berg <johannes.berg@intel.com>
    Signed-off-by: default avatarJohn W. Linville <linville@tuxdriver.com>
    deeaee19
mac80211.h 135 KB