int bfd_verify_pkt_auth (vlib_main_t * vm, const bfd_pkt_t * pkt,
u16 pkt_size, bfd_session_t * bs);
void bfd_event (bfd_main_t * bm, bfd_session_t * bs);
int bfd_verify_pkt_auth (vlib_main_t * vm, const bfd_pkt_t * pkt,
u16 pkt_size, bfd_session_t * bs);
void bfd_event (bfd_main_t * bm, bfd_session_t * bs);