-extern int ppppktin __P((struct ppp_softc *sc, struct mbuf *m));
-struct mbuf *ppp_dequeue __P((struct ppp_softc *sc));
+struct ppp_softc *pppalloc(pid_t pid);
+void pppdealloc(struct ppp_softc *sc);
+int pppioctl(struct ppp_softc *sc, int cmd, caddr_t data, int flag);
+void ppp_restart(struct ppp_softc *sc);
+void ppppktin(struct ppp_softc *sc, struct mbuf *m, int lost);
+struct mbuf *ppp_dequeue(struct ppp_softc *sc);