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Linus Torvalds1da177e2005-04-16 15:20:36 -07001/*
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;
Thomas Graf47dcf0c2006-11-09 15:20:38 -080016 __u32 mark;
Linus Torvalds1da177e2005-04-16 15:20:36 -070017
18 union {
19 struct {
Al Virof2c3fe22006-09-26 21:26:42 -070020 __be32 daddr;
21 __be32 saddr;
Linus Torvalds1da177e2005-04-16 15:20:36 -070022 __u8 tos;
23 __u8 scope;
24 } ip4_u;
25
26 struct {
27 struct in6_addr daddr;
28 struct in6_addr saddr;
Al Viro90bcaf72006-11-08 00:25:17 -080029 __be32 flowlabel;
Linus Torvalds1da177e2005-04-16 15:20:36 -070030 } ip6_u;
31
32 struct {
Steven Whitehousec4ea94a2006-03-20 22:42:39 -080033 __le16 daddr;
34 __le16 saddr;
Linus Torvalds1da177e2005-04-16 15:20:36 -070035 __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
Linus Torvalds1da177e2005-04-16 15:20:36 -070040#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
Linus Torvalds1da177e2005-04-16 15:20:36 -070046#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#define FLOWI_FLAG_MULTIPATHOLDROUTE 0x01
52 union {
53 struct {
Al Virocc939d32006-09-27 18:33:22 -070054 __be16 sport;
55 __be16 dport;
Linus Torvalds1da177e2005-04-16 15:20:36 -070056 } ports;
57
58 struct {
59 __u8 type;
60 __u8 code;
61 } icmpt;
62
63 struct {
Steven Whitehousec4ea94a2006-03-20 22:42:39 -080064 __le16 sport;
65 __le16 dport;
Linus Torvalds1da177e2005-04-16 15:20:36 -070066 } dnports;
67
Al Viro4324a172006-09-27 18:49:07 -070068 __be32 spi;
Masahide NAKAMURA2b741652006-08-23 20:34:26 -070069
70#ifdef CONFIG_IPV6_MIP6
71 struct {
72 __u8 type;
73 } mht;
74#endif
Linus Torvalds1da177e2005-04-16 15:20:36 -070075 } uli_u;
76#define fl_ip_sport uli_u.ports.sport
77#define fl_ip_dport uli_u.ports.dport
78#define fl_icmp_type uli_u.icmpt.type
79#define fl_icmp_code uli_u.icmpt.code
80#define fl_ipsec_spi uli_u.spi
Masahide NAKAMURA2b741652006-08-23 20:34:26 -070081#ifdef CONFIG_IPV6_MIP6
82#define fl_mh_type uli_u.mht.type
83#endif
Venkat Yekkiralab6340fc2006-07-24 23:28:37 -070084 __u32 secid; /* used by xfrm; see secid.txt */
Linus Torvalds1da177e2005-04-16 15:20:36 -070085} __attribute__((__aligned__(BITS_PER_LONG/8)));
86
87#define FLOW_DIR_IN 0
88#define FLOW_DIR_OUT 1
89#define FLOW_DIR_FWD 2
90
Trent Jaegerdf718372005-12-13 23:12:27 -080091struct sock;
James Morris134b0fc2006-10-05 15:42:27 -050092typedef int (*flow_resolve_t)(struct flowi *key, u16 family, u8 dir,
Linus Torvalds1da177e2005-04-16 15:20:36 -070093 void **objp, atomic_t **obj_refp);
94
Venkat Yekkiralae0d1caa2006-07-24 23:29:07 -070095extern void *flow_cache_lookup(struct flowi *key, u16 family, u8 dir,
Trent Jaegerdf718372005-12-13 23:12:27 -080096 flow_resolve_t resolver);
Linus Torvalds1da177e2005-04-16 15:20:36 -070097extern void flow_cache_flush(void);
98extern atomic_t flow_cache_genid;
99
Masahide NAKAMURA157bfc22007-04-30 00:33:35 -0700100static inline int flow_cache_uli_match(struct flowi *fl1, struct flowi *fl2)
101{
102 return (fl1->proto == fl2->proto &&
103 !memcmp(&fl1->uli_u, &fl2->uli_u, sizeof(fl1->uli_u)));
104}
105
Linus Torvalds1da177e2005-04-16 15:20:36 -0700106#endif