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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 | ||
1b7179d3 TG |
22 | struct flowi_tunnel { |
23 | __be64 tun_id; | |
24 | }; | |
25 | ||
806566cc DM |
26 | struct flowi_common { |
27 | int flowic_oif; | |
28 | int flowic_iif; | |
29 | __u32 flowic_mark; | |
30 | __u8 flowic_tos; | |
31 | __u8 flowic_scope; | |
32 | __u8 flowic_proto; | |
33 | __u8 flowic_flags; | |
fbef0a40 | 34 | #define FLOWI_FLAG_ANYSRC 0x01 |
0e0d44ab | 35 | #define FLOWI_FLAG_KNOWN_NH 0x02 |
613d09b3 | 36 | #define FLOWI_FLAG_VRFSRC 0x04 |
806566cc | 37 | __u32 flowic_secid; |
1b7179d3 | 38 | struct flowi_tunnel flowic_tun_key; |
806566cc DM |
39 | }; |
40 | ||
08704bcb DM |
41 | union flowi_uli { |
42 | struct { | |
08704bcb | 43 | __be16 dport; |
9b12c75b | 44 | __be16 sport; |
08704bcb DM |
45 | } ports; |
46 | ||
47 | struct { | |
48 | __u8 type; | |
49 | __u8 code; | |
50 | } icmpt; | |
51 | ||
52 | struct { | |
08704bcb | 53 | __le16 dport; |
9b12c75b | 54 | __le16 sport; |
08704bcb DM |
55 | } dnports; |
56 | ||
57 | __be32 spi; | |
58 | __be32 gre_key; | |
59 | ||
60 | struct { | |
61 | __u8 type; | |
62 | } mht; | |
63 | }; | |
64 | ||
56bb8059 DM |
65 | struct flowi4 { |
66 | struct flowi_common __fl_common; | |
22bd5b9b DM |
67 | #define flowi4_oif __fl_common.flowic_oif |
68 | #define flowi4_iif __fl_common.flowic_iif | |
69 | #define flowi4_mark __fl_common.flowic_mark | |
70 | #define flowi4_tos __fl_common.flowic_tos | |
71 | #define flowi4_scope __fl_common.flowic_scope | |
72 | #define flowi4_proto __fl_common.flowic_proto | |
73 | #define flowi4_flags __fl_common.flowic_flags | |
74 | #define flowi4_secid __fl_common.flowic_secid | |
1b7179d3 | 75 | #define flowi4_tun_key __fl_common.flowic_tun_key |
84f9307c ED |
76 | |
77 | /* (saddr,daddr) must be grouped, same order as in IP header */ | |
56bb8059 | 78 | __be32 saddr; |
84f9307c ED |
79 | __be32 daddr; |
80 | ||
56bb8059 | 81 | union flowi_uli uli; |
9cce96df DM |
82 | #define fl4_sport uli.ports.sport |
83 | #define fl4_dport uli.ports.dport | |
84 | #define fl4_icmp_type uli.icmpt.type | |
85 | #define fl4_icmp_code uli.icmpt.code | |
86 | #define fl4_ipsec_spi uli.spi | |
87 | #define fl4_mh_type uli.mht.type | |
88 | #define fl4_gre_key uli.gre_key | |
728871bc | 89 | } __attribute__((__aligned__(BITS_PER_LONG/8))); |
56bb8059 | 90 | |
83229aa5 DM |
91 | static inline void flowi4_init_output(struct flowi4 *fl4, int oif, |
92 | __u32 mark, __u8 tos, __u8 scope, | |
93 | __u8 proto, __u8 flags, | |
94 | __be32 daddr, __be32 saddr, | |
747465ef | 95 | __be16 dport, __be16 sport) |
83229aa5 DM |
96 | { |
97 | fl4->flowi4_oif = oif; | |
6a662719 | 98 | fl4->flowi4_iif = LOOPBACK_IFINDEX; |
83229aa5 DM |
99 | fl4->flowi4_mark = mark; |
100 | fl4->flowi4_tos = tos; | |
101 | fl4->flowi4_scope = scope; | |
102 | fl4->flowi4_proto = proto; | |
103 | fl4->flowi4_flags = flags; | |
104 | fl4->flowi4_secid = 0; | |
1b7179d3 | 105 | fl4->flowi4_tun_key.tun_id = 0; |
83229aa5 DM |
106 | fl4->daddr = daddr; |
107 | fl4->saddr = saddr; | |
83229aa5 | 108 | fl4->fl4_dport = dport; |
9b12c75b | 109 | fl4->fl4_sport = sport; |
83229aa5 | 110 | } |
e6b45241 JA |
111 | |
112 | /* Reset some input parameters after previous lookup */ | |
113 | static inline void flowi4_update_output(struct flowi4 *fl4, int oif, __u8 tos, | |
114 | __be32 daddr, __be32 saddr) | |
115 | { | |
116 | fl4->flowi4_oif = oif; | |
117 | fl4->flowi4_tos = tos; | |
118 | fl4->daddr = daddr; | |
119 | fl4->saddr = saddr; | |
120 | } | |
83229aa5 DM |
121 | |
122 | ||
56bb8059 | 123 | struct flowi6 { |
806566cc | 124 | struct flowi_common __fl_common; |
2032656e DM |
125 | #define flowi6_oif __fl_common.flowic_oif |
126 | #define flowi6_iif __fl_common.flowic_iif | |
127 | #define flowi6_mark __fl_common.flowic_mark | |
128 | #define flowi6_tos __fl_common.flowic_tos | |
129 | #define flowi6_scope __fl_common.flowic_scope | |
130 | #define flowi6_proto __fl_common.flowic_proto | |
131 | #define flowi6_flags __fl_common.flowic_flags | |
132 | #define flowi6_secid __fl_common.flowic_secid | |
904af04d | 133 | #define flowi6_tun_key __fl_common.flowic_tun_key |
56bb8059 DM |
134 | struct in6_addr daddr; |
135 | struct in6_addr saddr; | |
136 | __be32 flowlabel; | |
137 | union flowi_uli uli; | |
1958b856 DM |
138 | #define fl6_sport uli.ports.sport |
139 | #define fl6_dport uli.ports.dport | |
140 | #define fl6_icmp_type uli.icmpt.type | |
141 | #define fl6_icmp_code uli.icmpt.code | |
142 | #define fl6_ipsec_spi uli.spi | |
143 | #define fl6_mh_type uli.mht.type | |
144 | #define fl6_gre_key uli.gre_key | |
728871bc | 145 | } __attribute__((__aligned__(BITS_PER_LONG/8))); |
1da177e4 | 146 | |
56bb8059 DM |
147 | struct flowidn { |
148 | struct flowi_common __fl_common; | |
bef55aeb DM |
149 | #define flowidn_oif __fl_common.flowic_oif |
150 | #define flowidn_iif __fl_common.flowic_iif | |
151 | #define flowidn_mark __fl_common.flowic_mark | |
152 | #define flowidn_scope __fl_common.flowic_scope | |
153 | #define flowidn_proto __fl_common.flowic_proto | |
154 | #define flowidn_flags __fl_common.flowic_flags | |
56bb8059 DM |
155 | __le16 daddr; |
156 | __le16 saddr; | |
157 | union flowi_uli uli; | |
bef55aeb DM |
158 | #define fld_sport uli.ports.sport |
159 | #define fld_dport uli.ports.dport | |
728871bc | 160 | } __attribute__((__aligned__(BITS_PER_LONG/8))); |
56bb8059 DM |
161 | |
162 | struct flowi { | |
1da177e4 | 163 | union { |
56bb8059 DM |
164 | struct flowi_common __fl_common; |
165 | struct flowi4 ip4; | |
166 | struct flowi6 ip6; | |
167 | struct flowidn dn; | |
168 | } u; | |
169 | #define flowi_oif u.__fl_common.flowic_oif | |
170 | #define flowi_iif u.__fl_common.flowic_iif | |
171 | #define flowi_mark u.__fl_common.flowic_mark | |
172 | #define flowi_tos u.__fl_common.flowic_tos | |
173 | #define flowi_scope u.__fl_common.flowic_scope | |
174 | #define flowi_proto u.__fl_common.flowic_proto | |
175 | #define flowi_flags u.__fl_common.flowic_flags | |
176 | #define flowi_secid u.__fl_common.flowic_secid | |
1b7179d3 | 177 | #define flowi_tun_key u.__fl_common.flowic_tun_key |
1da177e4 LT |
178 | } __attribute__((__aligned__(BITS_PER_LONG/8))); |
179 | ||
59b1a94c DM |
180 | static inline struct flowi *flowi4_to_flowi(struct flowi4 *fl4) |
181 | { | |
182 | return container_of(fl4, struct flowi, u.ip4); | |
183 | } | |
184 | ||
185 | static inline struct flowi *flowi6_to_flowi(struct flowi6 *fl6) | |
186 | { | |
187 | return container_of(fl6, struct flowi, u.ip6); | |
188 | } | |
189 | ||
190 | static inline struct flowi *flowidn_to_flowi(struct flowidn *fldn) | |
191 | { | |
192 | return container_of(fldn, struct flowi, u.dn); | |
193 | } | |
194 | ||
aa1c366e | 195 | typedef unsigned long flow_compare_t; |
196 | ||
197 | static inline size_t flow_key_size(u16 family) | |
198 | { | |
199 | switch (family) { | |
200 | case AF_INET: | |
201 | BUILD_BUG_ON(sizeof(struct flowi4) % sizeof(flow_compare_t)); | |
202 | return sizeof(struct flowi4) / sizeof(flow_compare_t); | |
203 | case AF_INET6: | |
204 | BUILD_BUG_ON(sizeof(struct flowi6) % sizeof(flow_compare_t)); | |
205 | return sizeof(struct flowi6) / sizeof(flow_compare_t); | |
206 | case AF_DECnet: | |
207 | BUILD_BUG_ON(sizeof(struct flowidn) % sizeof(flow_compare_t)); | |
208 | return sizeof(struct flowidn) / sizeof(flow_compare_t); | |
209 | } | |
210 | return 0; | |
211 | } | |
212 | ||
1da177e4 LT |
213 | #define FLOW_DIR_IN 0 |
214 | #define FLOW_DIR_OUT 1 | |
215 | #define FLOW_DIR_FWD 2 | |
216 | ||
52479b62 | 217 | struct net; |
df71837d | 218 | struct sock; |
fe1a5f03 TT |
219 | struct flow_cache_ops; |
220 | ||
221 | struct flow_cache_object { | |
222 | const struct flow_cache_ops *ops; | |
223 | }; | |
224 | ||
225 | struct flow_cache_ops { | |
226 | struct flow_cache_object *(*get)(struct flow_cache_object *); | |
227 | int (*check)(struct flow_cache_object *); | |
228 | void (*delete)(struct flow_cache_object *); | |
229 | }; | |
230 | ||
231 | typedef struct flow_cache_object *(*flow_resolve_t)( | |
dee9f4bc | 232 | struct net *net, const struct flowi *key, u16 family, |
fe1a5f03 TT |
233 | u8 dir, struct flow_cache_object *oldobj, void *ctx); |
234 | ||
4787342c JP |
235 | struct flow_cache_object *flow_cache_lookup(struct net *net, |
236 | const struct flowi *key, u16 family, | |
237 | u8 dir, flow_resolve_t resolver, | |
238 | void *ctx); | |
ca925cf1 | 239 | int flow_cache_init(struct net *net); |
4a93f509 | 240 | void flow_cache_fini(struct net *net); |
1da177e4 | 241 | |
ca925cf1 FD |
242 | void flow_cache_flush(struct net *net); |
243 | void flow_cache_flush_deferred(struct net *net); | |
1da177e4 LT |
244 | extern atomic_t flow_cache_genid; |
245 | ||
246 | #endif |