BFD session status notification

Hi, I am wondering if there is a way an application can be notified when BFD session status changes. I know currently I can check the BFD session by polling with birdc or scanning the log, but if there is some way I get the notification it would help me much more. The reason I am ask this is because when I used keepalived, I found keepalived can send VIP events to an FIFO and my application can get these events from it. Thanks. Chen