+int at_pcballoc(struct socket *, struct atpcb *);
+int at_pcbdetach(struct atpcb *);
+int at_pcbbind(struct atpcb *, struct sockaddr *);
+
+int atalk_getref(struct fileproc *, int , gref_t ** , struct proc *, int);
+int atalk_getref_locked(struct fileproc *, int , gref_t ** , struct proc *, int);
+
+void atalk_notify(gref_t *, int);
+void atalk_notify_sel(gref_t *);
+
+int atalk_peek(gref_t *, unsigned char *);
+
+void ddp_putmsg(gref_t *gref, gbuf_t *mp);
+int ddp_socket_inuse(u_char, u_char);
+void ddp_notify_nbp(unsigned char, int, unsigned char);
+
+void atalk_putnext(gref_t *gref, gbuf_t *m);
+void atalk_enablew(gref_t *gref);
+void atalk_flush(gref_t *gref);
+
+void at_memzone_init(void);