--- zzzz-none-000/linux-4.4.271/include/net/ip.h	2021-06-03 06:22:09.000000000 +0000
+++ hawkeye-5590-750/linux-4.4.271/include/net/ip.h	2023-04-19 10:22:30.000000000 +0000
@@ -119,6 +119,7 @@
 
 int ip_queue_xmit(struct sock *sk, struct sk_buff *skb, struct flowi *fl);
 void ip_init(void);
+void ip_input_init(void);
 int ip_append_data(struct sock *sk, struct flowi4 *fl4,
 		   int getfrag(void *from, char *to, int offset, int len,
 			       int odd, struct sk_buff *skb),
@@ -172,6 +173,7 @@
 				/* -1 if not needed */ 
 	int	    bound_dev_if;
 	u8  	    tos;
+	kuid_t	    uid;
 }; 
 
 #define IP_REPLY_ARG_NOSRCCHECK 1
@@ -242,6 +244,9 @@
 }
 #endif
 
+/* From ip_forward.c */
+extern int sysctl_ip_use_legacy_tos;
+
 /* From inetpeer.c */
 extern int inet_peer_threshold;
 extern int inet_peer_minttl;