Function frame_class 

pub fn frame_class(fc: &FrameControl) -> FrameClass

IEEE Std 802.11-2016, 11.3.3 Unlike IEEE which only considers Public and Self-Protected Action frames Class 1 frames, Fuchsia considers all Action frames Class 1 frames when checking a frame’s FrameControl. Use action_frame_class(category) to determine an Action frame’s proper frame Class. Fuchsia supports neither IBSS nor PBSS, thus, every frame is evaluated in respect to an Infrastructure BSS.