ip_route_output_key_hash
struct rtable *ip_route_output_key_hash(struct net *net, struct flowi4 *flp,
return ip_route_output_key_hash(net, flp, NULL);
rt = ip_route_output_key_hash(net, fl4, skb_in);
EXPORT_SYMBOL_GPL(ip_route_output_key_hash);