--- zzzz-none-000/linux-4.4.271/include/uapi/linux/sockios.h	2021-06-03 06:22:09.000000000 +0000
+++ hawkeye-5590-750/linux-4.4.271/include/uapi/linux/sockios.h	2023-04-19 10:22:30.000000000 +0000
@@ -128,6 +128,10 @@
 #define SIOCSHWTSTAMP	0x89b0		/* set and get config		*/
 #define SIOCGHWTSTAMP	0x89b1		/* get config			*/
 
+/* application mark. only implemented in CONFIG_AVM_SK_TC_INDEX kernels */
+#define SIOCSET_TC_INDEX	0x89d0	/* set tc_index for socket */
+#define SIOCGET_TC_INDEX	0x89d1	/* get tc_index for socket */
+
 /* Device private ioctl calls */
 
 /*