/*
*
* Generic internet FLOW.
*
*/

#ifndef _NET_FLOW_H
#define _NET_FLOW_H

#include #include

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 0×01
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;
typedef int (*flow_resolve_t)(struct net *net, struct flowi *key, u16 family,
u8 dir, void **objp, atomic_t **obj_refp);

extern void *flow_cache_lookup(struct net *net, struct flowi *key, u16 family,
u8 dir, flow_resolve_t resolver);
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

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