openflow_input: add ofp_nicira_controller_role enum
diff --git a/openflow_input/nicira_role b/openflow_input/nicira_role
index 06d7c7f..caa2c1a 100644
--- a/openflow_input/nicira_role
+++ b/openflow_input/nicira_role
@@ -27,6 +27,12 @@
 
 #version 1
 
+enum ofp_nicira_controller_role {
+   NX_ROLE_OTHER = 0,
+   NX_ROLE_MASTER = 1,
+   NX_ROLE_SLAVE = 2,
+};
+
 struct ofp_nicira_controller_role_request {
     uint8_t version;
     uint8_t type;