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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
David S. Miller806566c2011-03-11 18:22:00 -050013struct flowi_common {
14 int flowic_oif;
15 int flowic_iif;
16 __u32 flowic_mark;
17 __u8 flowic_tos;
18 __u8 flowic_scope;
19 __u8 flowic_proto;
20 __u8 flowic_flags;
David S. Millerfbef0a42011-03-11 15:55:37 -050021#define FLOWI_FLAG_ANYSRC 0x01
22#define FLOWI_FLAG_PRECOW_METRICS 0x02
23#define FLOWI_FLAG_CAN_SLEEP 0x04
David S. Miller806566c2011-03-11 18:22:00 -050024 __u32 flowic_secid;
25};
26
David S. Miller08704bc2011-03-11 18:36:42 -050027union flowi_uli {
28 struct {
David S. Miller08704bc2011-03-11 18:36:42 -050029 __be16 dport;
David S. Miller9b12c752011-03-31 18:03:35 -070030 __be16 sport;
David S. Miller08704bc2011-03-11 18:36:42 -050031 } ports;
32
33 struct {
34 __u8 type;
35 __u8 code;
36 } icmpt;
37
38 struct {
David S. Miller08704bc2011-03-11 18:36:42 -050039 __le16 dport;
David S. Miller9b12c752011-03-31 18:03:35 -070040 __le16 sport;
David S. Miller08704bc2011-03-11 18:36:42 -050041 } dnports;
42
43 __be32 spi;
44 __be32 gre_key;
45
46 struct {
47 __u8 type;
48 } mht;
49};
50
David S. Miller56bb8052011-03-12 00:44:35 -050051struct flowi4 {
David S. Miller806566c2011-03-11 18:22:00 -050052 struct flowi_common __fl_common;
David S. Miller22bd5b92011-03-11 19:54:08 -050053#define flowi4_oif __fl_common.flowic_oif
54#define flowi4_iif __fl_common.flowic_iif
55#define flowi4_mark __fl_common.flowic_mark
56#define flowi4_tos __fl_common.flowic_tos
57#define flowi4_scope __fl_common.flowic_scope
58#define flowi4_proto __fl_common.flowic_proto
59#define flowi4_flags __fl_common.flowic_flags
60#define flowi4_secid __fl_common.flowic_secid
David S. Miller56bb8052011-03-12 00:44:35 -050061 __be32 daddr;
62 __be32 saddr;
63 union flowi_uli uli;
David S. Miller9cce96d2011-03-12 03:00:33 -050064#define fl4_sport uli.ports.sport
65#define fl4_dport uli.ports.dport
66#define fl4_icmp_type uli.icmpt.type
67#define fl4_icmp_code uli.icmpt.code
68#define fl4_ipsec_spi uli.spi
69#define fl4_mh_type uli.mht.type
70#define fl4_gre_key uli.gre_key
David S. Miller56bb8052011-03-12 00:44:35 -050071};
Linus Torvalds1da177e2005-04-16 15:20:36 -070072
David S. Miller83229aa2011-03-31 04:52:14 -070073static inline void flowi4_init_output(struct flowi4 *fl4, int oif,
74 __u32 mark, __u8 tos, __u8 scope,
75 __u8 proto, __u8 flags,
76 __be32 daddr, __be32 saddr,
77 __be16 dport, __be32 sport)
78{
79 fl4->flowi4_oif = oif;
80 fl4->flowi4_iif = 0;
81 fl4->flowi4_mark = mark;
82 fl4->flowi4_tos = tos;
83 fl4->flowi4_scope = scope;
84 fl4->flowi4_proto = proto;
85 fl4->flowi4_flags = flags;
86 fl4->flowi4_secid = 0;
87 fl4->daddr = daddr;
88 fl4->saddr = saddr;
David S. Miller83229aa2011-03-31 04:52:14 -070089 fl4->fl4_dport = dport;
David S. Miller9b12c752011-03-31 18:03:35 -070090 fl4->fl4_sport = sport;
David S. Miller83229aa2011-03-31 04:52:14 -070091}
92
93
David S. Miller56bb8052011-03-12 00:44:35 -050094struct flowi6 {
95 struct flowi_common __fl_common;
David S. Miller20326562011-03-12 02:30:50 -050096#define flowi6_oif __fl_common.flowic_oif
97#define flowi6_iif __fl_common.flowic_iif
98#define flowi6_mark __fl_common.flowic_mark
99#define flowi6_tos __fl_common.flowic_tos
100#define flowi6_scope __fl_common.flowic_scope
101#define flowi6_proto __fl_common.flowic_proto
102#define flowi6_flags __fl_common.flowic_flags
103#define flowi6_secid __fl_common.flowic_secid
David S. Miller56bb8052011-03-12 00:44:35 -0500104 struct in6_addr daddr;
105 struct in6_addr saddr;
106 __be32 flowlabel;
107 union flowi_uli uli;
David S. Miller1958b852011-03-12 16:36:19 -0500108#define fl6_sport uli.ports.sport
109#define fl6_dport uli.ports.dport
110#define fl6_icmp_type uli.icmpt.type
111#define fl6_icmp_code uli.icmpt.code
112#define fl6_ipsec_spi uli.spi
113#define fl6_mh_type uli.mht.type
114#define fl6_gre_key uli.gre_key
David S. Miller56bb8052011-03-12 00:44:35 -0500115};
116
117struct flowidn {
118 struct flowi_common __fl_common;
David S. Millerbef55ae2011-03-12 17:17:10 -0500119#define flowidn_oif __fl_common.flowic_oif
120#define flowidn_iif __fl_common.flowic_iif
121#define flowidn_mark __fl_common.flowic_mark
122#define flowidn_scope __fl_common.flowic_scope
123#define flowidn_proto __fl_common.flowic_proto
124#define flowidn_flags __fl_common.flowic_flags
David S. Miller56bb8052011-03-12 00:44:35 -0500125 __le16 daddr;
126 __le16 saddr;
127 union flowi_uli uli;
David S. Millerbef55ae2011-03-12 17:17:10 -0500128#define fld_sport uli.ports.sport
129#define fld_dport uli.ports.dport
David S. Miller56bb8052011-03-12 00:44:35 -0500130};
131
132struct flowi {
Linus Torvalds1da177e2005-04-16 15:20:36 -0700133 union {
David S. Miller56bb8052011-03-12 00:44:35 -0500134 struct flowi_common __fl_common;
135 struct flowi4 ip4;
136 struct flowi6 ip6;
137 struct flowidn dn;
138 } u;
139#define flowi_oif u.__fl_common.flowic_oif
140#define flowi_iif u.__fl_common.flowic_iif
141#define flowi_mark u.__fl_common.flowic_mark
142#define flowi_tos u.__fl_common.flowic_tos
143#define flowi_scope u.__fl_common.flowic_scope
144#define flowi_proto u.__fl_common.flowic_proto
145#define flowi_flags u.__fl_common.flowic_flags
146#define flowi_secid u.__fl_common.flowic_secid
Linus Torvalds1da177e2005-04-16 15:20:36 -0700147} __attribute__((__aligned__(BITS_PER_LONG/8)));
148
David S. Miller59b1a942011-03-11 19:23:02 -0500149static inline struct flowi *flowi4_to_flowi(struct flowi4 *fl4)
150{
151 return container_of(fl4, struct flowi, u.ip4);
152}
153
154static inline struct flowi *flowi6_to_flowi(struct flowi6 *fl6)
155{
156 return container_of(fl6, struct flowi, u.ip6);
157}
158
159static inline struct flowi *flowidn_to_flowi(struct flowidn *fldn)
160{
161 return container_of(fldn, struct flowi, u.dn);
162}
163
Linus Torvalds1da177e2005-04-16 15:20:36 -0700164#define FLOW_DIR_IN 0
165#define FLOW_DIR_OUT 1
166#define FLOW_DIR_FWD 2
167
Alexey Dobriyan52479b62008-11-25 17:35:18 -0800168struct net;
Trent Jaegerdf718372005-12-13 23:12:27 -0800169struct sock;
Timo Teräsfe1a5f02010-04-07 00:30:04 +0000170struct flow_cache_ops;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700171
Timo Teräsfe1a5f02010-04-07 00:30:04 +0000172struct flow_cache_object {
173 const struct flow_cache_ops *ops;
174};
175
176struct flow_cache_ops {
177 struct flow_cache_object *(*get)(struct flow_cache_object *);
178 int (*check)(struct flow_cache_object *);
179 void (*delete)(struct flow_cache_object *);
180};
181
182typedef struct flow_cache_object *(*flow_resolve_t)(
David S. Millerdee9f4b2011-02-22 18:44:31 -0800183 struct net *net, const struct flowi *key, u16 family,
Timo Teräsfe1a5f02010-04-07 00:30:04 +0000184 u8 dir, struct flow_cache_object *oldobj, void *ctx);
185
186extern struct flow_cache_object *flow_cache_lookup(
David S. Millerdee9f4b2011-02-22 18:44:31 -0800187 struct net *net, const struct flowi *key, u16 family,
Timo Teräsfe1a5f02010-04-07 00:30:04 +0000188 u8 dir, flow_resolve_t resolver, void *ctx);
189
Linus Torvalds1da177e2005-04-16 15:20:36 -0700190extern void flow_cache_flush(void);
191extern atomic_t flow_cache_genid;
192
Linus Torvalds1da177e2005-04-16 15:20:36 -0700193#endif