-extern int __udp4_lib_rcv(struct sk_buff *, struct hlist_head [], int );
-extern void __udp4_lib_err(struct sk_buff *, u32, struct hlist_head []);
-
-extern int __udp_lib_get_port(struct sock *sk, unsigned short snum,
- struct hlist_head udptable[], int *port_rover,
- const struct udp_get_port_ops *ops);