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/*
*
* Generic internet FLOW.
*
*/
#ifndef _NET_FLOW_H
#define _NET_FLOW_H
#include <linux/in6.h>
#include <asm/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 sport;
__be16 dport;
} ports;
struct {
__u8 type;
__u8 code;
} icmpt;
struct {
__le16 sport;
__le16 dport;
} dnports;
__be32 spi;
__be32 gre_key;
struct {
__u8 type;
} mht;
};
struct flowi4 {
struct flowi_common __fl_common;
__be32 daddr;
__be32 saddr;
union flowi_uli uli;
};
struct flowi6 {
struct flowi_common __fl_common;
struct in6_addr daddr;
struct in6_addr saddr;
__be32 flowlabel;
union flowi_uli uli;
};
struct flowidn {
struct flowi_common __fl_common;
__le16 daddr;
__le16 saddr;
union flowi_uli uli;
};
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
#define fl4_tos flowi_tos
#define fl4_scope flowi_scope
#define fld_scope flowi_scope
#define fld_dst u.dn.daddr
#define fld_src u.dn.saddr
#define fl6_dst u.ip6.daddr
#define fl6_src u.ip6.saddr
#define fl6_flowlabel u.ip6.flowlabel
#define fl4_dst u.ip4.daddr
#define fl4_src u.ip4.saddr
#define fl4_sport u.ip4.uli.ports.sport
#define fl4_dport u.ip4.uli.ports.dport
#define fl4_icmp_type u.ip4.uli.icmpt.type
#define fl4_icmp_code u.ip4.uli.icmpt.code
#define fl4_ipsec_spi u.ip4.uli.spi
#define fl4_mh_type u.ip4.uli.mht.type
#define fl4_gre_key u.ip4.uli.gre_key
#define fl6_sport u.ip6.uli.ports.sport
#define fl6_dport u.ip6.uli.ports.dport
#define fl6_icmp_type u.ip6.uli.icmpt.type
#define fl6_icmp_code u.ip6.uli.icmpt.code
#define fl6_ipsec_spi u.ip6.uli.spi
#define fl6_mh_type u.ip6.uli.mht.type
#define fl6_gre_key u.ip6.uli.gre_key
} __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);
}
#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 atomic_t flow_cache_genid;
#endif
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