extern struct sk_buff *dn_alloc_skb(struct sock *sk, int size, gfp_t pri);
extern int dn_route_output_sock(struct dst_entry **pprt, struct flowi *, struct sock *sk, int flags);
extern int dn_cache_dump(struct sk_buff *skb, struct netlink_callback *cb);
-extern int dn_cache_getroute(struct sk_buff *skb, struct nlmsghdr *nlh, void *arg);
extern void dn_rt_cache_flush(int delay);
/* Masks for flags field */