void cfm_compose_ccm(struct cfm *, struct ofpbuf *packet, uint8_t eth_src[6]);
void cfm_wait(struct cfm *);
bool cfm_configure(struct cfm *, const struct cfm_settings *);
+void cfm_set_netdev(struct cfm *, const struct netdev *);
bool cfm_should_process_flow(const struct cfm *cfm, const struct flow *);
void cfm_process_heartbeat(struct cfm *, const struct ofpbuf *packet);
int cfm_get_fault(const struct cfm *);