+enum ofp_flow_mod_flags {
+ OFPFF_SEND_FLOW_REM = 1 << 0, /* Send flow removed message when flow
+ * expires or is deleted. */
+ OFPFF_CHECK_OVERLAP = 1 << 1, /* Check for overlapping entries first. */
+ OFPFF_EMERG = 1 << 2 /* Ramark this is for emergency. */
+};
+