Linux kernel mirror (for testing)
git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git
tjh.dev
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 __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 union {
51 struct {
52 __be16 sport;
53 __be16 dport;
54 } ports;
55
56 struct {
57 __u8 type;
58 __u8 code;
59 } icmpt;
60
61 struct {
62 __le16 sport;
63 __le16 dport;
64 } dnports;
65
66 __be32 spi;
67
68 struct {
69 __u8 type;
70 } mht;
71 } uli_u;
72#define fl_ip_sport uli_u.ports.sport
73#define fl_ip_dport uli_u.ports.dport
74#define fl_icmp_type uli_u.icmpt.type
75#define fl_icmp_code uli_u.icmpt.code
76#define fl_ipsec_spi uli_u.spi
77#define fl_mh_type uli_u.mht.type
78 __u32 secid; /* used by xfrm; see secid.txt */
79} __attribute__((__aligned__(BITS_PER_LONG/8)));
80
81#define FLOW_DIR_IN 0
82#define FLOW_DIR_OUT 1
83#define FLOW_DIR_FWD 2
84
85struct sock;
86typedef int (*flow_resolve_t)(struct flowi *key, u16 family, u8 dir,
87 void **objp, atomic_t **obj_refp);
88
89extern void *flow_cache_lookup(struct flowi *key, u16 family, u8 dir,
90 flow_resolve_t resolver);
91extern void flow_cache_flush(void);
92extern atomic_t flow_cache_genid;
93
94static inline int flow_cache_uli_match(struct flowi *fl1, struct flowi *fl2)
95{
96 return (fl1->proto == fl2->proto &&
97 !memcmp(&fl1->uli_u, &fl2->uli_u, sizeof(fl1->uli_u)));
98}
99
100#endif