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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 flowi {
struct flowi_common __fl_common;
#define flowi_oif __fl_common.flowic_oif
#define flowi_iif __fl_common.flowic_iif
#define flowi_mark __fl_common.flowic_mark
#define flowi_tos __fl_common.flowic_tos
#define flowi_scope __fl_common.flowic_scope
#define flowi_proto __fl_common.flowic_proto
#define flowi_flags __fl_common.flowic_flags
#define flowi_secid __fl_common.flowic_secid
union {
struct {
__be32 daddr;
__be32 saddr;
} 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 flowi_tos
#define fl4_scope flowi_scope
union flowi_uli 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
#define fl_gre_key uli_u.gre_key
} __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, 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;
static inline int flow_cache_uli_match(const struct flowi *fl1,
const struct flowi *fl2)
{
return (fl1->flowi_proto == fl2->flowi_proto &&
!memcmp(&fl1->uli_u, &fl2->uli_u, sizeof(fl1->uli_u)));
}
#endif
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