struct ip6_hdr;
void tcp6_ctlinput __P((int, struct sockaddr *, void *));
void tcp6_init __P((void));
-int tcp6_input __P((struct mbuf **, int *, int));
+int tcp6_input __P((struct mbuf **, int *));
struct rtentry *tcp_rtlookup6 __P((struct inpcb *));
extern struct pr_usrreqs tcp6_usrreqs;