--- zzzz-none-000/linux-4.9.279/include/uapi/linux/netlink.h	2021-08-08 06:38:54.000000000 +0000
+++ puma7-atom-6591-750/linux-4.9.279/include/uapi/linux/netlink.h	2023-02-08 11:43:43.000000000 +0000
@@ -30,6 +30,9 @@
 
 #define NETLINK_INET_DIAG	NETLINK_SOCK_DIAG
 
+/* Added definition for netlink socket to notify about defensive states switching. */
+#define NETLINK_DDH_NOTIFICATIONS 22
+
 #define MAX_LINKS 32		
 
 struct sockaddr_nl {