+/* From in_pcb.h: */
+extern int in_pcballoc(struct socket *, struct inpcb *);
+extern int in_pcbbind(struct inpcb *, struct mbuf *);
+extern int in_pcbconnect(struct inpcb *, struct mbuf *);
+extern void in_pcbdisconnect(struct inpcb *);
+extern void in_pcbdetach(struct inpcb *);
+extern void in_setsockaddr(struct inpcb *, struct mbuf *);
+extern void in_setpeeraddr(struct inpcb *, struct mbuf *);
+extern void in_pcbnotify(struct inpcb *, struct sockaddr *, int, struct in_addr, int, int, void (*)(struct inpcb *, int));
+extern void in_losing(struct inpcb *);
+extern void in_rtchange(struct inpcb *, int);
+extern struct inpcb *in_pcblookup(struct inpcb *, struct in_addr, int, struct in_addr, int, int);
+
+
+#ifdef MTUDISC
+extern void in_pcbmtu(struct inpcb *);
+extern void in_mtunotify(struct inpcb *);
+extern void in_bumpmtu(struct inpcb *);
+#endif /* MTUDISC */
+#endif /* KERNEL */