+
+#ifdef KERNEL
+#define IFAFREE(ifa) \
+ if ((ifa)->ifa_refcnt <= 0) \
+ ifafree(ifa); \
+ else \
+ (ifa)->ifa_refcnt--;
+
+struct ifnet *ifnet;
+
+void ether_ifattach __P((struct ifnet *));
+void ether_input __P((struct ifnet *, struct ether_header *, struct mbuf *));
+int ether_output __P((struct ifnet *,
+ struct mbuf *, struct sockaddr *, struct rtentry *));
+char *ether_sprintf __P((u_char *));
+
+void if_attach __P((struct ifnet *));
+void if_down __P((struct ifnet *));
+void if_qflush __P((struct ifqueue *));
+void if_slowtimo __P((void *));
+void if_up __P((struct ifnet *));
+#ifdef vax
+void ifubareset __P((int));
+#endif
+int ifconf __P((int, caddr_t));
+void ifinit __P((void));
+int ifioctl __P((struct socket *, u_long, caddr_t, struct proc *));
+int ifpromisc __P((struct ifnet *, int));
+struct ifnet *ifunit __P((char *));
+
+struct ifaddr *ifa_ifwithaddr __P((struct sockaddr *));
+struct ifaddr *ifa_ifwithaf __P((int));
+struct ifaddr *ifa_ifwithdstaddr __P((struct sockaddr *));
+struct ifaddr *ifa_ifwithnet __P((struct sockaddr *));
+struct ifaddr *ifa_ifwithroute __P((int, struct sockaddr *,
+ struct sockaddr *));
+struct ifaddr *ifaof_ifpforaddr __P((struct sockaddr *, struct ifnet *));
+void ifafree __P((struct ifaddr *));
+void link_rtrequest __P((int, struct rtentry *, struct sockaddr *));
+
+int loioctl __P((struct ifnet *, u_long, caddr_t));
+void loopattach __P((int));
+int looutput __P((struct ifnet *,
+ struct mbuf *, struct sockaddr *, struct rtentry *));
+void lortrequest __P((int, struct rtentry *, struct sockaddr *));
+#endif