/* * *	Generic internet FLOW. * */ #ifndef _NET_FLOW_H#define _NET_FLOW_H #include <linux/socket.h>#include <linux/in6.h>#include <linux/atomic.h> struct flowi_common {	int	flowic_oif;	int	flowic_iif;	__u32	flowic_mark;	__u8	flowic_tos;	__u8	flowic_scope;	__u8	flowic_proto;	__u8	flowic_flags;#define FLOWI_FLAG_ANYSRC		0x01#define FLOWI_FLAG_PRECOW_METRICS	0x02#define FLOWI_FLAG_CAN_SLEEP		0x04	__u32	flowic_secid;}; union flowi_uli {	struct {		__be16	dport;		__be16	sport;	} ports; 	struct {		__u8	type;		__u8	code;	} icmpt; 	struct {		__le16	dport;		__le16	sport;	} dnports; 	__be32		spi;	__be32		gre_key; 	struct {		__u8	type;	} mht;}; struct flowi4 {	struct flowi_common	__fl_common;#define flowi4_oif		__fl_common.flowic_oif#define flowi4_iif		__fl_common.flowic_iif#define flowi4_mark		__fl_common.flowic_mark#define flowi4_tos		__fl_common.flowic_tos#define flowi4_scope		__fl_common.flowic_scope#define flowi4_proto		__fl_common.flowic_proto#define flowi4_flags		__fl_common.flowic_flags#define flowi4_secid		__fl_common.flowic_secid 	/* (saddr,daddr) must be grouped, same order as in IP header */	__be32			saddr;	__be32			daddr; 	union flowi_uli		uli;#define fl4_sport		uli.ports.sport#define fl4_dport		uli.ports.dport#define fl4_icmp_type		uli.icmpt.type#define fl4_icmp_code		uli.icmpt.code#define fl4_ipsec_spi		uli.spi#define fl4_mh_type		uli.mht.type#define fl4_gre_key		uli.gre_key} __attribute__((__aligned__(BITS_PER_LONG/8))); static inline void flowi4_init_output(struct flowi4 *fl4, int oif,				      __u32 mark, __u8 tos, __u8 scope,				      __u8 proto, __u8 flags,				      __be32 daddr, __be32 saddr,				      __be16 dport, __be16 sport){	fl4->flowi4_oif = oif;	fl4->flowi4_iif = 0;	fl4->flowi4_mark = mark;	fl4->flowi4_tos = tos;	fl4->flowi4_scope = scope;	fl4->flowi4_proto = proto;	fl4->flowi4_flags = flags;	fl4->flowi4_secid = 0;	fl4->daddr = daddr;	fl4->saddr = saddr;	fl4->fl4_dport = dport;	fl4->fl4_sport = sport;} /* Reset some input parameters after previous lookup */static inline void flowi4_update_output(struct flowi4 *fl4, int oif, __u8 tos,					__be32 daddr, __be32 saddr){	fl4->flowi4_oif = oif;	fl4->flowi4_tos = tos;	fl4->daddr = daddr;	fl4->saddr = saddr;}				       struct flowi6 {	struct flowi_common	__fl_common;#define flowi6_oif		__fl_common.flowic_oif#define flowi6_iif		__fl_common.flowic_iif#define flowi6_mark		__fl_common.flowic_mark#define flowi6_tos		__fl_common.flowic_tos#define flowi6_scope		__fl_common.flowic_scope#define flowi6_proto		__fl_common.flowic_proto#define flowi6_flags		__fl_common.flowic_flags#define flowi6_secid		__fl_common.flowic_secid	struct in6_addr		daddr;	struct in6_addr		saddr;	__be32			flowlabel;	union flowi_uli		uli;#define fl6_sport		uli.ports.sport#define fl6_dport		uli.ports.dport#define fl6_icmp_type		uli.icmpt.type#define fl6_icmp_code		uli.icmpt.code#define fl6_ipsec_spi		uli.spi#define fl6_mh_type		uli.mht.type#define fl6_gre_key		uli.gre_key} __attribute__((__aligned__(BITS_PER_LONG/8))); struct flowidn {	struct flowi_common	__fl_common;#define flowidn_oif		__fl_common.flowic_oif#define flowidn_iif		__fl_common.flowic_iif#define flowidn_mark		__fl_common.flowic_mark#define flowidn_scope		__fl_common.flowic_scope#define flowidn_proto		__fl_common.flowic_proto#define flowidn_flags		__fl_common.flowic_flags	__le16			daddr;	__le16			saddr;	union flowi_uli		uli;#define fld_sport		uli.ports.sport#define fld_dport		uli.ports.dport} __attribute__((__aligned__(BITS_PER_LONG/8))); struct flowi {	union {		struct flowi_common	__fl_common;		struct flowi4		ip4;		struct flowi6		ip6;		struct flowidn		dn;	} u;#define flowi_oif	u.__fl_common.flowic_oif#define flowi_iif	u.__fl_common.flowic_iif#define flowi_mark	u.__fl_common.flowic_mark#define flowi_tos	u.__fl_common.flowic_tos#define flowi_scope	u.__fl_common.flowic_scope#define flowi_proto	u.__fl_common.flowic_proto#define flowi_flags	u.__fl_common.flowic_flags#define flowi_secid	u.__fl_common.flowic_secid} __attribute__((__aligned__(BITS_PER_LONG/8))); static inline struct flowi *flowi4_to_flowi(struct flowi4 *fl4){	return container_of(fl4, struct flowi, u.ip4);} static inline struct flowi *flowi6_to_flowi(struct flowi6 *fl6){	return container_of(fl6, struct flowi, u.ip6);} static inline struct flowi *flowidn_to_flowi(struct flowidn *fldn){	return container_of(fldn, struct flowi, u.dn);} typedef unsigned long flow_compare_t; static inline size_t flow_key_size(u16 family){	switch (family) {	case AF_INET:		BUILD_BUG_ON(sizeof(struct flowi4) % sizeof(flow_compare_t));		return sizeof(struct flowi4) / sizeof(flow_compare_t);	case AF_INET6:		BUILD_BUG_ON(sizeof(struct flowi6) % sizeof(flow_compare_t));		return sizeof(struct flowi6) / sizeof(flow_compare_t);	case AF_DECnet:		BUILD_BUG_ON(sizeof(struct flowidn) % sizeof(flow_compare_t));		return sizeof(struct flowidn) / sizeof(flow_compare_t);	}	return 0;} #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, const 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, const struct flowi *key, u16 family,		u8 dir, flow_resolve_t resolver, void *ctx); extern void flow_cache_flush(void);extern void flow_cache_flush_deferred(void);extern atomic_t flow_cache_genid; #endif