• Luis R. Rodriguez's avatar
    cfg80211: Fix country IE parsing for single channel triplets · cc5d8a37
    Luis R. Rodriguez authored
    This enhances the way we parse country IEs to minimize
    the number of regulatory rules that we create. It also fixes
    our current implementation which treated country IE triplets
    with only one channel as one independed regulatory rule even
    though adjecent rules were also being provided.
    
    Without this patch APs which send country IE information with
    a channel triplet for each individual channel will force cfg80211
    to deny HT40 operation as a regulatory rule would have been created
    independently for each channel and as such configured only for
    20 MHz operation.
    
    Although 802.11n APs which send country IEs triplets in this fassion
    are likely rare Benoit reports this against the Ubiquity NanoStation M5,
    with Country "FR" and HT40 enabled.
    
    Since we now have a helper which parses the triplets in intermediate
    steps we now take care extra care to process padding.
    Reported-by: default avatarBenoit PAPILLAULT <benoit.papillault@free.fr>
    Signed-off-by: default avatarLuis R. Rodriguez <lrodriguez@atheros.com>
    Signed-off-by: default avatarJohn W. Linville <linville@tuxdriver.com>
    cc5d8a37
reg.c 64.4 KB