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> |
6fa3eb70 | 13 | #include <linux/uidgid.h> |
1da177e4 | 14 | |
44dda375 CW |
15 | /* |
16 | * ifindex generation is per-net namespace, and loopback is | |
17 | * always the 1st device in ns (see net_dev_init), thus any | |
18 | * loopback device should get ifindex 1 | |
19 | */ | |
20 | ||
21 | #define LOOPBACK_IFINDEX 1 | |
22 | ||
806566cc DM |
23 | struct flowi_common { |
24 | int flowic_oif; | |
25 | int flowic_iif; | |
26 | __u32 flowic_mark; | |
27 | __u8 flowic_tos; | |
28 | __u8 flowic_scope; | |
29 | __u8 flowic_proto; | |
30 | __u8 flowic_flags; | |
fbef0a40 | 31 | #define FLOWI_FLAG_ANYSRC 0x01 |
3e12939a | 32 | #define FLOWI_FLAG_CAN_SLEEP 0x02 |
c92b9655 | 33 | #define FLOWI_FLAG_KNOWN_NH 0x04 |
806566cc | 34 | __u32 flowic_secid; |
6fa3eb70 | 35 | kuid_t flowic_uid; |
806566cc DM |
36 | }; |
37 | ||
08704bcb DM |
38 | union flowi_uli { |
39 | struct { | |
08704bcb | 40 | __be16 dport; |
9b12c75b | 41 | __be16 sport; |
08704bcb DM |
42 | } ports; |
43 | ||
44 | struct { | |
45 | __u8 type; | |
46 | __u8 code; | |
47 | } icmpt; | |
48 | ||
49 | struct { | |
08704bcb | 50 | __le16 dport; |
9b12c75b | 51 | __le16 sport; |
08704bcb DM |
52 | } dnports; |
53 | ||
54 | __be32 spi; | |
55 | __be32 gre_key; | |
56 | ||
57 | struct { | |
58 | __u8 type; | |
59 | } mht; | |
60 | }; | |
61 | ||
56bb8059 DM |
62 | struct flowi4 { |
63 | struct flowi_common __fl_common; | |
22bd5b9b DM |
64 | #define flowi4_oif __fl_common.flowic_oif |
65 | #define flowi4_iif __fl_common.flowic_iif | |
66 | #define flowi4_mark __fl_common.flowic_mark | |
67 | #define flowi4_tos __fl_common.flowic_tos | |
68 | #define flowi4_scope __fl_common.flowic_scope | |
69 | #define flowi4_proto __fl_common.flowic_proto | |
70 | #define flowi4_flags __fl_common.flowic_flags | |
71 | #define flowi4_secid __fl_common.flowic_secid | |
6fa3eb70 | 72 | #define flowi4_uid __fl_common.flowic_uid |
84f9307c ED |
73 | |
74 | /* (saddr,daddr) must be grouped, same order as in IP header */ | |
56bb8059 | 75 | __be32 saddr; |
84f9307c ED |
76 | __be32 daddr; |
77 | ||
56bb8059 | 78 | union flowi_uli uli; |
9cce96df DM |
79 | #define fl4_sport uli.ports.sport |
80 | #define fl4_dport uli.ports.dport | |
81 | #define fl4_icmp_type uli.icmpt.type | |
82 | #define fl4_icmp_code uli.icmpt.code | |
83 | #define fl4_ipsec_spi uli.spi | |
84 | #define fl4_mh_type uli.mht.type | |
85 | #define fl4_gre_key uli.gre_key | |
728871bc | 86 | } __attribute__((__aligned__(BITS_PER_LONG/8))); |
56bb8059 | 87 | |
83229aa5 DM |
88 | static inline void flowi4_init_output(struct flowi4 *fl4, int oif, |
89 | __u32 mark, __u8 tos, __u8 scope, | |
90 | __u8 proto, __u8 flags, | |
91 | __be32 daddr, __be32 saddr, | |
6fa3eb70 S |
92 | __be16 dport, __be16 sport, |
93 | kuid_t uid) | |
83229aa5 DM |
94 | { |
95 | fl4->flowi4_oif = oif; | |
44dda375 | 96 | fl4->flowi4_iif = LOOPBACK_IFINDEX; |
83229aa5 DM |
97 | fl4->flowi4_mark = mark; |
98 | fl4->flowi4_tos = tos; | |
99 | fl4->flowi4_scope = scope; | |
100 | fl4->flowi4_proto = proto; | |
101 | fl4->flowi4_flags = flags; | |
102 | fl4->flowi4_secid = 0; | |
6fa3eb70 | 103 | fl4->flowi4_uid = uid; |
83229aa5 DM |
104 | fl4->daddr = daddr; |
105 | fl4->saddr = saddr; | |
83229aa5 | 106 | fl4->fl4_dport = dport; |
9b12c75b | 107 | fl4->fl4_sport = sport; |
83229aa5 | 108 | } |
e6b45241 JA |
109 | |
110 | /* Reset some input parameters after previous lookup */ | |
111 | static inline void flowi4_update_output(struct flowi4 *fl4, int oif, __u8 tos, | |
112 | __be32 daddr, __be32 saddr) | |
113 | { | |
114 | fl4->flowi4_oif = oif; | |
115 | fl4->flowi4_tos = tos; | |
116 | fl4->daddr = daddr; | |
117 | fl4->saddr = saddr; | |
118 | } | |
83229aa5 DM |
119 | |
120 | ||
56bb8059 | 121 | struct flowi6 { |
806566cc | 122 | struct flowi_common __fl_common; |
2032656e DM |
123 | #define flowi6_oif __fl_common.flowic_oif |
124 | #define flowi6_iif __fl_common.flowic_iif | |
125 | #define flowi6_mark __fl_common.flowic_mark | |
126 | #define flowi6_tos __fl_common.flowic_tos | |
127 | #define flowi6_scope __fl_common.flowic_scope | |
128 | #define flowi6_proto __fl_common.flowic_proto | |
129 | #define flowi6_flags __fl_common.flowic_flags | |
130 | #define flowi6_secid __fl_common.flowic_secid | |
6fa3eb70 | 131 | #define flowi6_uid __fl_common.flowic_uid |
56bb8059 DM |
132 | struct in6_addr daddr; |
133 | struct in6_addr saddr; | |
134 | __be32 flowlabel; | |
135 | union flowi_uli uli; | |
1958b856 DM |
136 | #define fl6_sport uli.ports.sport |
137 | #define fl6_dport uli.ports.dport | |
138 | #define fl6_icmp_type uli.icmpt.type | |
139 | #define fl6_icmp_code uli.icmpt.code | |
140 | #define fl6_ipsec_spi uli.spi | |
141 | #define fl6_mh_type uli.mht.type | |
142 | #define fl6_gre_key uli.gre_key | |
728871bc | 143 | } __attribute__((__aligned__(BITS_PER_LONG/8))); |
1da177e4 | 144 | |
56bb8059 DM |
145 | struct flowidn { |
146 | struct flowi_common __fl_common; | |
bef55aeb DM |
147 | #define flowidn_oif __fl_common.flowic_oif |
148 | #define flowidn_iif __fl_common.flowic_iif | |
149 | #define flowidn_mark __fl_common.flowic_mark | |
150 | #define flowidn_scope __fl_common.flowic_scope | |
151 | #define flowidn_proto __fl_common.flowic_proto | |
152 | #define flowidn_flags __fl_common.flowic_flags | |
56bb8059 DM |
153 | __le16 daddr; |
154 | __le16 saddr; | |
155 | union flowi_uli uli; | |
bef55aeb DM |
156 | #define fld_sport uli.ports.sport |
157 | #define fld_dport uli.ports.dport | |
728871bc | 158 | } __attribute__((__aligned__(BITS_PER_LONG/8))); |
56bb8059 DM |
159 | |
160 | struct flowi { | |
1da177e4 | 161 | union { |
56bb8059 DM |
162 | struct flowi_common __fl_common; |
163 | struct flowi4 ip4; | |
164 | struct flowi6 ip6; | |
165 | struct flowidn dn; | |
166 | } u; | |
167 | #define flowi_oif u.__fl_common.flowic_oif | |
168 | #define flowi_iif u.__fl_common.flowic_iif | |
169 | #define flowi_mark u.__fl_common.flowic_mark | |
170 | #define flowi_tos u.__fl_common.flowic_tos | |
171 | #define flowi_scope u.__fl_common.flowic_scope | |
172 | #define flowi_proto u.__fl_common.flowic_proto | |
173 | #define flowi_flags u.__fl_common.flowic_flags | |
174 | #define flowi_secid u.__fl_common.flowic_secid | |
6fa3eb70 | 175 | #define flowi_uid u.__fl_common.flowic_uid |
1da177e4 LT |
176 | } __attribute__((__aligned__(BITS_PER_LONG/8))); |
177 | ||
59b1a94c DM |
178 | static inline struct flowi *flowi4_to_flowi(struct flowi4 *fl4) |
179 | { | |
180 | return container_of(fl4, struct flowi, u.ip4); | |
181 | } | |
182 | ||
183 | static inline struct flowi *flowi6_to_flowi(struct flowi6 *fl6) | |
184 | { | |
185 | return container_of(fl6, struct flowi, u.ip6); | |
186 | } | |
187 | ||
188 | static inline struct flowi *flowidn_to_flowi(struct flowidn *fldn) | |
189 | { | |
190 | return container_of(fldn, struct flowi, u.dn); | |
191 | } | |
192 | ||
aa1c366e | 193 | typedef unsigned long flow_compare_t; |
194 | ||
195 | static inline size_t flow_key_size(u16 family) | |
196 | { | |
197 | switch (family) { | |
198 | case AF_INET: | |
199 | BUILD_BUG_ON(sizeof(struct flowi4) % sizeof(flow_compare_t)); | |
200 | return sizeof(struct flowi4) / sizeof(flow_compare_t); | |
201 | case AF_INET6: | |
202 | BUILD_BUG_ON(sizeof(struct flowi6) % sizeof(flow_compare_t)); | |
203 | return sizeof(struct flowi6) / sizeof(flow_compare_t); | |
204 | case AF_DECnet: | |
205 | BUILD_BUG_ON(sizeof(struct flowidn) % sizeof(flow_compare_t)); | |
206 | return sizeof(struct flowidn) / sizeof(flow_compare_t); | |
207 | } | |
208 | return 0; | |
209 | } | |
210 | ||
1da177e4 LT |
211 | #define FLOW_DIR_IN 0 |
212 | #define FLOW_DIR_OUT 1 | |
213 | #define FLOW_DIR_FWD 2 | |
214 | ||
52479b62 | 215 | struct net; |
df71837d | 216 | struct sock; |
fe1a5f03 TT |
217 | struct flow_cache_ops; |
218 | ||
219 | struct flow_cache_object { | |
220 | const struct flow_cache_ops *ops; | |
221 | }; | |
222 | ||
223 | struct flow_cache_ops { | |
224 | struct flow_cache_object *(*get)(struct flow_cache_object *); | |
225 | int (*check)(struct flow_cache_object *); | |
226 | void (*delete)(struct flow_cache_object *); | |
227 | }; | |
228 | ||
229 | typedef struct flow_cache_object *(*flow_resolve_t)( | |
dee9f4bc | 230 | struct net *net, const struct flowi *key, u16 family, |
fe1a5f03 TT |
231 | u8 dir, struct flow_cache_object *oldobj, void *ctx); |
232 | ||
233 | extern struct flow_cache_object *flow_cache_lookup( | |
dee9f4bc | 234 | struct net *net, const struct flowi *key, u16 family, |
fe1a5f03 | 235 | u8 dir, flow_resolve_t resolver, void *ctx); |
1da177e4 | 236 | |
1da177e4 | 237 | extern void flow_cache_flush(void); |
c0ed1c14 | 238 | extern void flow_cache_flush_deferred(void); |
1da177e4 LT |
239 | extern atomic_t flow_cache_genid; |
240 | ||
241 | #endif |