#ifndef _NET_FLOW_KEYS_H#define _NET_FLOW_KEYS_H /* struct flow_keys: *	@src: source ip address in case of IPv4 *	      For IPv6 it contains 32bit hash of src address *	@dst: destination ip address in case of IPv4 *	      For IPv6 it contains 32bit hash of dst address *	@ports: port numbers of Transport header *		port16[0]: src port number *		port16[1]: dst port number *	@thoff: Transport header offset *	@n_proto: Network header protocol (eg. IPv4/IPv6) *	@ip_proto: Transport header protocol (eg. TCP/UDP) * All the members, except thoff, are in network byte order. */struct flow_keys {	/* (src,dst) must be grouped, in the same way than in IP header */	__be32 src;	__be32 dst;	union {		__be32 ports;		__be16 port16[2];	};	u16	thoff;	__be16	n_proto;	u8	ip_proto;}; bool __skb_flow_dissect(const struct sk_buff *skb, struct flow_keys *flow,			void *data, __be16 proto, int nhoff, int hlen);static inline bool skb_flow_dissect(const struct sk_buff *skb, struct flow_keys *flow){	return __skb_flow_dissect(skb, flow, NULL, 0, 0, 0);}__be32 __skb_flow_get_ports(const struct sk_buff *skb, int thoff, u8 ip_proto,			    void *data, int hlen_proto);static inline __be32 skb_flow_get_ports(const struct sk_buff *skb, int thoff, u8 ip_proto){	return __skb_flow_get_ports(skb, thoff, ip_proto, NULL, 0);}u32 flow_hash_from_keys(struct flow_keys *keys);unsigned int flow_get_hlen(const unsigned char *data, unsigned int max_len,			   __be16 protocol);#endif