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
13 struct 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
86 struct sock;
87 typedef int (*flow_resolve_t)(struct flowi *key, u16 family, u8 dir,
88 void **objp, atomic_t **obj_refp);
89
90 extern void *flow_cache_lookup(struct flowi *key, u16 family, u8 dir,
91 flow_resolve_t resolver);
92 extern void flow_cache_flush(void);
93 extern atomic_t flow_cache_genid;
94
95 static 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
102
|
This page was automatically generated by the
LXR engine.
|