extern void ip_rt_advice(struct rtable **rp, int advice);
extern void rt_cache_flush(int how);
extern int __ip_route_output_key(struct rtable **, const struct flowi *flp);
extern int ip_route_output_key(struct rtable **, struct flowi *flp);
extern int ip_route_output_flow(struct rtable **rp, struct flowi *flp, struct sock *sk, int flags);
extern void ip_rt_advice(struct rtable **rp, int advice);
extern void rt_cache_flush(int how);
extern int __ip_route_output_key(struct rtable **, const struct flowi *flp);
extern int ip_route_output_key(struct rtable **, struct flowi *flp);
extern int ip_route_output_flow(struct rtable **rp, struct flowi *flp, struct sock *sk, int flags);