Linux kernel mirror (for testing)
git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git
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kernel
os
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
17 union {
18 struct {
19 __be32 daddr;
20 __be32 saddr;
21 __u32 fwmark;
22 __u8 tos;
23 __u8 scope;
24 } ip4_u;
25
26 struct {
27 struct in6_addr daddr;
28 struct in6_addr saddr;
29 __u32 fwmark;
30 __u32 flowlabel;
31 } ip6_u;
32
33 struct {
34 __le16 daddr;
35 __le16 saddr;
36 __u32 fwmark;
37 __u8 scope;
38 } dn_u;
39 } nl_u;
40#define fld_dst nl_u.dn_u.daddr
41#define fld_src nl_u.dn_u.saddr
42#define fld_fwmark nl_u.dn_u.fwmark
43#define fld_scope nl_u.dn_u.scope
44#define fl6_dst nl_u.ip6_u.daddr
45#define fl6_src nl_u.ip6_u.saddr
46#define fl6_fwmark nl_u.ip6_u.fwmark
47#define fl6_flowlabel nl_u.ip6_u.flowlabel
48#define fl4_dst nl_u.ip4_u.daddr
49#define fl4_src nl_u.ip4_u.saddr
50#define fl4_fwmark nl_u.ip4_u.fwmark
51#define fl4_tos nl_u.ip4_u.tos
52#define fl4_scope nl_u.ip4_u.scope
53
54 __u8 proto;
55 __u8 flags;
56#define FLOWI_FLAG_MULTIPATHOLDROUTE 0x01
57 union {
58 struct {
59 __be16 sport;
60 __be16 dport;
61 } ports;
62
63 struct {
64 __u8 type;
65 __u8 code;
66 } icmpt;
67
68 struct {
69 __le16 sport;
70 __le16 dport;
71 } dnports;
72
73 __be32 spi;
74
75#ifdef CONFIG_IPV6_MIP6
76 struct {
77 __u8 type;
78 } mht;
79#endif
80 } uli_u;
81#define fl_ip_sport uli_u.ports.sport
82#define fl_ip_dport uli_u.ports.dport
83#define fl_icmp_type uli_u.icmpt.type
84#define fl_icmp_code uli_u.icmpt.code
85#define fl_ipsec_spi uli_u.spi
86#ifdef CONFIG_IPV6_MIP6
87#define fl_mh_type uli_u.mht.type
88#endif
89 __u32 secid; /* used by xfrm; see secid.txt */
90} __attribute__((__aligned__(BITS_PER_LONG/8)));
91
92#define FLOW_DIR_IN 0
93#define FLOW_DIR_OUT 1
94#define FLOW_DIR_FWD 2
95
96struct sock;
97typedef int (*flow_resolve_t)(struct flowi *key, u16 family, u8 dir,
98 void **objp, atomic_t **obj_refp);
99
100extern void *flow_cache_lookup(struct flowi *key, u16 family, u8 dir,
101 flow_resolve_t resolver);
102extern void flow_cache_flush(void);
103extern atomic_t flow_cache_genid;
104
105#endif