• Jan-Espen Pettersen's avatar
    mac80211: don't send empty extended rates IE · 8ab65b03
    Jan-Espen Pettersen authored
    The association request includes a list of supported data rates.
    802.11b: 4 supported rates.
    802.11g: 12 (8 + 4) supported rates.
    802.11a: 8 supported rates.
    The rates tag of the assoc request has room for only 8 rates. In case of
    802.11g an extended rate tag is appended. However in net/wireless/mlme.c
    an extended (empty) rate tag is also appended if the number of rates is
    exact 8. This empty (length=0) extended rates tag causes some APs to
    deny association with code 18 (unsupported rates). These APs include my
    ZyXEL G-570U, and according to Tomas Winkler som Cisco APs.
    'If count == 8' has been used to check for the need for an extended rates
    tag. But count would also be equal to 8 if the for loop exited because of
    no more supported rates. Therefore a check for count being less than
    rates_len would seem more correct.
    Thanks to:
     * Dan Williams for newbie guidance
     * Tomas Winkler for confirming the problem
    Signed-off-by: default avatarJan-Espen Pettersen <sigsegv@radiotube.org>
    Signed-off-by: default avatarJohn W. Linville <linville@tuxdriver.com>
mlme.c 124 KB