+ /* Check the operational status reported by the remote CFM endpoint of
+ * 'ofp_port' Returns 1 if operationally up, 0 if operationally down, and
+ * -1 if CFM is not enabled on 'ofp_port' or does not support operational
+ * status.
+ *
+ * This function may be a null pointer if the ofproto implementation does
+ * not support CFM. */
+ int (*get_cfm_opup)(const struct ofport *ofport);
+