/* * *	Generic internet FLOW. * */ #ifndef _NET_FLOW_H#define _NET_FLOW_H #include <linux/in6.h>#include <asm/atomic.h> struct flowi {	int	oif;	int	iif;	__u32	mark; 	union {		struct {			__be32			daddr;			__be32			saddr;			__u8			tos;			__u8			scope;		} ip4_u;				struct {			struct in6_addr		daddr;			struct in6_addr		saddr;			__be32			flowlabel;		} ip6_u; 		struct {			__le16			daddr;			__le16			saddr;			__u8			scope;		} dn_u;	} nl_u;#define fld_dst		nl_u.dn_u.daddr#define fld_src		nl_u.dn_u.saddr#define fld_scope	nl_u.dn_u.scope#define fl6_dst		nl_u.ip6_u.daddr#define fl6_src		nl_u.ip6_u.saddr#define fl6_flowlabel	nl_u.ip6_u.flowlabel#define fl4_dst		nl_u.ip4_u.daddr#define fl4_src		nl_u.ip4_u.saddr#define fl4_tos		nl_u.ip4_u.tos#define fl4_scope	nl_u.ip4_u.scope 	__u8	proto;	__u8	flags;#define FLOWI_FLAG_ANYSRC 0x01	union {		struct {			__be16	sport;			__be16	dport;		} ports; 		struct {			__u8	type;			__u8	code;		} icmpt; 		struct {			__le16	sport;			__le16	dport;		} dnports; 		__be32		spi; 		struct {			__u8	type;		} mht;	} uli_u;#define fl_ip_sport	uli_u.ports.sport#define fl_ip_dport	uli_u.ports.dport#define fl_icmp_type	uli_u.icmpt.type#define fl_icmp_code	uli_u.icmpt.code#define fl_ipsec_spi	uli_u.spi#define fl_mh_type	uli_u.mht.type	__u32           secid;	/* used by xfrm; see secid.txt */} __attribute__((__aligned__(BITS_PER_LONG/8))); #define FLOW_DIR_IN	0#define FLOW_DIR_OUT	1#define FLOW_DIR_FWD	2 struct net;struct sock;struct flow_cache_ops; struct flow_cache_object {	const struct flow_cache_ops *ops;}; struct flow_cache_ops {	struct flow_cache_object *(*get)(struct flow_cache_object *);	int (*check)(struct flow_cache_object *);	void (*delete)(struct flow_cache_object *);}; typedef struct flow_cache_object *(*flow_resolve_t)(		struct net *net, struct flowi *key, u16 family,		u8 dir, struct flow_cache_object *oldobj, void *ctx); extern struct flow_cache_object *flow_cache_lookup(		struct net *net, struct flowi *key, u16 family,		u8 dir, flow_resolve_t resolver, void *ctx); extern void flow_cache_flush(void);extern atomic_t flow_cache_genid; static inline int flow_cache_uli_match(struct flowi *fl1, struct flowi *fl2){	return (fl1->proto == fl2->proto &&		!memcmp(&fl1->uli_u, &fl2->uli_u, sizeof(fl1->uli_u)));} #endif