Commit | Line | Data |
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1da177e4 LT |
1 | /* |
2 | * | |
3 | * Generic internet FLOW. | |
4 | * | |
5 | */ | |
6 | ||
7 | #ifndef _NET_FLOW_H | |
8 | #define _NET_FLOW_H | |
9 | ||
aa1c366e | 10 | #include <linux/socket.h> |
1da177e4 | 11 | #include <linux/in6.h> |
60063497 | 12 | #include <linux/atomic.h> |
1da177e4 | 13 | |
6a662719 CW |
14 | /* |
15 | * ifindex generation is per-net namespace, and loopback is | |
16 | * always the 1st device in ns (see net_dev_init), thus any | |
17 | * loopback device should get ifindex 1 | |
18 | */ | |
19 | ||
20 | #define LOOPBACK_IFINDEX 1 | |
21 | ||
806566cc DM |
22 | struct flowi_common { |
23 | int flowic_oif; | |
24 | int flowic_iif; | |
25 | __u32 flowic_mark; | |
26 | __u8 flowic_tos; | |
27 | __u8 flowic_scope; | |
28 | __u8 flowic_proto; | |
29 | __u8 flowic_flags; | |
fbef0a40 | 30 | #define FLOWI_FLAG_ANYSRC 0x01 |
0e0d44ab | 31 | #define FLOWI_FLAG_KNOWN_NH 0x02 |
806566cc DM |
32 | __u32 flowic_secid; |
33 | }; | |
34 | ||
08704bcb DM |
35 | union flowi_uli { |
36 | struct { | |
08704bcb | 37 | __be16 dport; |
9b12c75b | 38 | __be16 sport; |
08704bcb DM |
39 | } ports; |
40 | ||
41 | struct { | |
42 | __u8 type; | |
43 | __u8 code; | |
44 | } icmpt; | |
45 | ||
46 | struct { | |
08704bcb | 47 | __le16 dport; |
9b12c75b | 48 | __le16 sport; |
08704bcb DM |
49 | } dnports; |
50 | ||
51 | __be32 spi; | |
52 | __be32 gre_key; | |
53 | ||
54 | struct { | |
55 | __u8 type; | |
56 | } mht; | |
57 | }; | |
58 | ||
56bb8059 DM |
59 | struct flowi4 { |
60 | struct flowi_common __fl_common; | |
22bd5b9b DM |
61 | #define flowi4_oif __fl_common.flowic_oif |
62 | #define flowi4_iif __fl_common.flowic_iif | |
63 | #define flowi4_mark __fl_common.flowic_mark | |
64 | #define flowi4_tos __fl_common.flowic_tos | |
65 | #define flowi4_scope __fl_common.flowic_scope | |
66 | #define flowi4_proto __fl_common.flowic_proto | |
67 | #define flowi4_flags __fl_common.flowic_flags | |
68 | #define flowi4_secid __fl_common.flowic_secid | |
84f9307c ED |
69 | |
70 | /* (saddr,daddr) must be grouped, same order as in IP header */ | |
56bb8059 | 71 | __be32 saddr; |
84f9307c ED |
72 | __be32 daddr; |
73 | ||
56bb8059 | 74 | union flowi_uli uli; |
9cce96df DM |
75 | #define fl4_sport uli.ports.sport |
76 | #define fl4_dport uli.ports.dport | |
77 | #define fl4_icmp_type uli.icmpt.type | |
78 | #define fl4_icmp_code uli.icmpt.code | |
79 | #define fl4_ipsec_spi uli.spi | |
80 | #define fl4_mh_type uli.mht.type | |
81 | #define fl4_gre_key uli.gre_key | |
728871bc | 82 | } __attribute__((__aligned__(BITS_PER_LONG/8))); |
56bb8059 | 83 | |
83229aa5 DM |
84 | static inline void flowi4_init_output(struct flowi4 *fl4, int oif, |
85 | __u32 mark, __u8 tos, __u8 scope, | |
86 | __u8 proto, __u8 flags, | |
87 | __be32 daddr, __be32 saddr, | |
747465ef | 88 | __be16 dport, __be16 sport) |
83229aa5 DM |
89 | { |
90 | fl4->flowi4_oif = oif; | |
6a662719 | 91 | fl4->flowi4_iif = LOOPBACK_IFINDEX; |
83229aa5 DM |
92 | fl4->flowi4_mark = mark; |
93 | fl4->flowi4_tos = tos; | |
94 | fl4->flowi4_scope = scope; | |
95 | fl4->flowi4_proto = proto; | |
96 | fl4->flowi4_flags = flags; | |
97 | fl4->flowi4_secid = 0; | |
98 | fl4->daddr = daddr; | |
99 | fl4->saddr = saddr; | |
83229aa5 | 100 | fl4->fl4_dport = dport; |
9b12c75b | 101 | fl4->fl4_sport = sport; |
83229aa5 | 102 | } |
e6b45241 JA |
103 | |
104 | /* Reset some input parameters after previous lookup */ | |
105 | static inline void flowi4_update_output(struct flowi4 *fl4, int oif, __u8 tos, | |
106 | __be32 daddr, __be32 saddr) | |
107 | { | |
108 | fl4->flowi4_oif = oif; | |
109 | fl4->flowi4_tos = tos; | |
110 | fl4->daddr = daddr; | |
111 | fl4->saddr = saddr; | |
112 | } | |
83229aa5 DM |
113 | |
114 | ||
56bb8059 | 115 | struct flowi6 { |
806566cc | 116 | struct flowi_common __fl_common; |
2032656e DM |
117 | #define flowi6_oif __fl_common.flowic_oif |
118 | #define flowi6_iif __fl_common.flowic_iif | |
119 | #define flowi6_mark __fl_common.flowic_mark | |
120 | #define flowi6_tos __fl_common.flowic_tos | |
121 | #define flowi6_scope __fl_common.flowic_scope | |
122 | #define flowi6_proto __fl_common.flowic_proto | |
123 | #define flowi6_flags __fl_common.flowic_flags | |
124 | #define flowi6_secid __fl_common.flowic_secid | |
56bb8059 DM |
125 | struct in6_addr daddr; |
126 | struct in6_addr saddr; | |
127 | __be32 flowlabel; | |
128 | union flowi_uli uli; | |
1958b856 DM |
129 | #define fl6_sport uli.ports.sport |
130 | #define fl6_dport uli.ports.dport | |
131 | #define fl6_icmp_type uli.icmpt.type | |
132 | #define fl6_icmp_code uli.icmpt.code | |
133 | #define fl6_ipsec_spi uli.spi | |
134 | #define fl6_mh_type uli.mht.type | |
135 | #define fl6_gre_key uli.gre_key | |
728871bc | 136 | } __attribute__((__aligned__(BITS_PER_LONG/8))); |
1da177e4 | 137 | |
56bb8059 DM |
138 | struct flowidn { |
139 | struct flowi_common __fl_common; | |
bef55aeb DM |
140 | #define flowidn_oif __fl_common.flowic_oif |
141 | #define flowidn_iif __fl_common.flowic_iif | |
142 | #define flowidn_mark __fl_common.flowic_mark | |
143 | #define flowidn_scope __fl_common.flowic_scope | |
144 | #define flowidn_proto __fl_common.flowic_proto | |
145 | #define flowidn_flags __fl_common.flowic_flags | |
56bb8059 DM |
146 | __le16 daddr; |
147 | __le16 saddr; | |
148 | union flowi_uli uli; | |
bef55aeb DM |
149 | #define fld_sport uli.ports.sport |
150 | #define fld_dport uli.ports.dport | |
728871bc | 151 | } __attribute__((__aligned__(BITS_PER_LONG/8))); |
56bb8059 DM |
152 | |
153 | struct flowi { | |
1da177e4 | 154 | union { |
56bb8059 DM |
155 | struct flowi_common __fl_common; |
156 | struct flowi4 ip4; | |
157 | struct flowi6 ip6; | |
158 | struct flowidn dn; | |
159 | } u; | |
160 | #define flowi_oif u.__fl_common.flowic_oif | |
161 | #define flowi_iif u.__fl_common.flowic_iif | |
162 | #define flowi_mark u.__fl_common.flowic_mark | |
163 | #define flowi_tos u.__fl_common.flowic_tos | |
164 | #define flowi_scope u.__fl_common.flowic_scope | |
165 | #define flowi_proto u.__fl_common.flowic_proto | |
166 | #define flowi_flags u.__fl_common.flowic_flags | |
167 | #define flowi_secid u.__fl_common.flowic_secid | |
1da177e4 LT |
168 | } __attribute__((__aligned__(BITS_PER_LONG/8))); |
169 | ||
59b1a94c DM |
170 | static inline struct flowi *flowi4_to_flowi(struct flowi4 *fl4) |
171 | { | |
172 | return container_of(fl4, struct flowi, u.ip4); | |
173 | } | |
174 | ||
175 | static inline struct flowi *flowi6_to_flowi(struct flowi6 *fl6) | |
176 | { | |
177 | return container_of(fl6, struct flowi, u.ip6); | |
178 | } | |
179 | ||
180 | static inline struct flowi *flowidn_to_flowi(struct flowidn *fldn) | |
181 | { | |
182 | return container_of(fldn, struct flowi, u.dn); | |
183 | } | |
184 | ||
aa1c366e | 185 | typedef unsigned long flow_compare_t; |
186 | ||
187 | static inline size_t flow_key_size(u16 family) | |
188 | { | |
189 | switch (family) { | |
190 | case AF_INET: | |
191 | BUILD_BUG_ON(sizeof(struct flowi4) % sizeof(flow_compare_t)); | |
192 | return sizeof(struct flowi4) / sizeof(flow_compare_t); | |
193 | case AF_INET6: | |
194 | BUILD_BUG_ON(sizeof(struct flowi6) % sizeof(flow_compare_t)); | |
195 | return sizeof(struct flowi6) / sizeof(flow_compare_t); | |
196 | case AF_DECnet: | |
197 | BUILD_BUG_ON(sizeof(struct flowidn) % sizeof(flow_compare_t)); | |
198 | return sizeof(struct flowidn) / sizeof(flow_compare_t); | |
199 | } | |
200 | return 0; | |
201 | } | |
202 | ||
1da177e4 LT |
203 | #define FLOW_DIR_IN 0 |
204 | #define FLOW_DIR_OUT 1 | |
205 | #define FLOW_DIR_FWD 2 | |
206 | ||
52479b62 | 207 | struct net; |
df71837d | 208 | struct sock; |
fe1a5f03 TT |
209 | struct flow_cache_ops; |
210 | ||
211 | struct flow_cache_object { | |
212 | const struct flow_cache_ops *ops; | |
213 | }; | |
214 | ||
215 | struct flow_cache_ops { | |
216 | struct flow_cache_object *(*get)(struct flow_cache_object *); | |
217 | int (*check)(struct flow_cache_object *); | |
218 | void (*delete)(struct flow_cache_object *); | |
219 | }; | |
220 | ||
221 | typedef struct flow_cache_object *(*flow_resolve_t)( | |
dee9f4bc | 222 | struct net *net, const struct flowi *key, u16 family, |
fe1a5f03 TT |
223 | u8 dir, struct flow_cache_object *oldobj, void *ctx); |
224 | ||
4787342c JP |
225 | struct flow_cache_object *flow_cache_lookup(struct net *net, |
226 | const struct flowi *key, u16 family, | |
227 | u8 dir, flow_resolve_t resolver, | |
228 | void *ctx); | |
ca925cf1 | 229 | int flow_cache_init(struct net *net); |
4a93f509 | 230 | void flow_cache_fini(struct net *net); |
1da177e4 | 231 | |
ca925cf1 FD |
232 | void flow_cache_flush(struct net *net); |
233 | void flow_cache_flush_deferred(struct net *net); | |
1da177e4 LT |
234 | extern atomic_t flow_cache_genid; |
235 | ||
236 | #endif |