Linux kernel mirror (for testing)
git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git
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linux
1/*
2 *
3 * Generic internet FLOW.
4 *
5 */
6
7#ifndef _NET_FLOW_H
8#define _NET_FLOW_H
9
10#include <linux/in6.h>
11#include <asm/atomic.h>
12
13struct flowi {
14 int oif;
15 int iif;
16 __u32 mark;
17
18 union {
19 struct {
20 __be32 daddr;
21 __be32 saddr;
22 __u8 tos;
23 __u8 scope;
24 } ip4_u;
25
26 struct {
27 struct in6_addr daddr;
28 struct in6_addr saddr;
29 __be32 flowlabel;
30 } ip6_u;
31
32 struct {
33 __le16 daddr;
34 __le16 saddr;
35 __u8 scope;
36 } dn_u;
37 } nl_u;
38#define fld_dst nl_u.dn_u.daddr
39#define fld_src nl_u.dn_u.saddr
40#define fld_scope nl_u.dn_u.scope
41#define fl6_dst nl_u.ip6_u.daddr
42#define fl6_src nl_u.ip6_u.saddr
43#define fl6_flowlabel nl_u.ip6_u.flowlabel
44#define fl4_dst nl_u.ip4_u.daddr
45#define fl4_src nl_u.ip4_u.saddr
46#define fl4_tos nl_u.ip4_u.tos
47#define fl4_scope nl_u.ip4_u.scope
48
49 __u8 proto;
50 __u8 flags;
51 union {
52 struct {
53 __be16 sport;
54 __be16 dport;
55 } ports;
56
57 struct {
58 __u8 type;
59 __u8 code;
60 } icmpt;
61
62 struct {
63 __le16 sport;
64 __le16 dport;
65 } dnports;
66
67 __be32 spi;
68
69 struct {
70 __u8 type;
71 } mht;
72 } uli_u;
73#define fl_ip_sport uli_u.ports.sport
74#define fl_ip_dport uli_u.ports.dport
75#define fl_icmp_type uli_u.icmpt.type
76#define fl_icmp_code uli_u.icmpt.code
77#define fl_ipsec_spi uli_u.spi
78#define fl_mh_type uli_u.mht.type
79 __u32 secid; /* used by xfrm; see secid.txt */
80} __attribute__((__aligned__(BITS_PER_LONG/8)));
81
82#define FLOW_DIR_IN 0
83#define FLOW_DIR_OUT 1
84#define FLOW_DIR_FWD 2
85
86struct sock;
87typedef int (*flow_resolve_t)(struct flowi *key, u16 family, u8 dir,
88 void **objp, atomic_t **obj_refp);
89
90extern void *flow_cache_lookup(struct flowi *key, u16 family, u8 dir,
91 flow_resolve_t resolver);
92extern void flow_cache_flush(void);
93extern atomic_t flow_cache_genid;
94
95static inline int flow_cache_uli_match(struct flowi *fl1, struct flowi *fl2)
96{
97 return (fl1->proto == fl2->proto &&
98 !memcmp(&fl1->uli_u, &fl2->uli_u, sizeof(fl1->uli_u)));
99}
100
101#endif