• Felix Fietkau's avatar
    mac80211: reduce the amount of unnecessary traffic on cooked monitor interfaces · 3e5b1101
    Felix Fietkau authored
    In order to handle association and authentication in AP mode,
    hostapd needs access to the tx status info of its own frames
    through a cooked monitor interface. Without this patch the
    cooked monitor interfaces also passed on tx status information
    for packets from other virtual interfaces. This creates a
    significant performance issue on embedded system. Hostapd
    tries to work around this by installing a Linux Socket Filter
    that only captures the frames it's interested in, however
    data duplication and socket filter matching still uses up
    enough CPU cycles to be very noticeable on small systems.
    This patch ensures that tx status information of non-injected
    frames does not make it to cooked monitor interfaces.
    Signed-off-by: default avatarFelix Fietkau <nbd@openwrt.org>
    Signed-off-by: default avatarJohn W. Linville <linville@tuxdriver.com>
main.c 28.1 KB