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b2441318 | 1 | /* SPDX-License-Identifier: GPL-2.0 */ |
1da177e4 LT |
2 | /* |
3 | * | |
4 | * Generic internet FLOW. | |
5 | * | |
6 | */ | |
7 | ||
8 | #ifndef _NET_FLOW_H | |
9 | #define _NET_FLOW_H | |
10 | ||
aa1c366e | 11 | #include <linux/socket.h> |
1da177e4 | 12 | #include <linux/in6.h> |
60063497 | 13 | #include <linux/atomic.h> |
c6cc1ca7 | 14 | #include <net/flow_dissector.h> |
622ec2c9 | 15 | #include <linux/uidgid.h> |
1da177e4 | 16 | |
6a662719 CW |
17 | /* |
18 | * ifindex generation is per-net namespace, and loopback is | |
19 | * always the 1st device in ns (see net_dev_init), thus any | |
20 | * loopback device should get ifindex 1 | |
21 | */ | |
22 | ||
23 | #define LOOPBACK_IFINDEX 1 | |
24 | ||
1b7179d3 TG |
25 | struct flowi_tunnel { |
26 | __be64 tun_id; | |
27 | }; | |
28 | ||
806566cc DM |
29 | struct flowi_common { |
30 | int flowic_oif; | |
31 | int flowic_iif; | |
32 | __u32 flowic_mark; | |
33 | __u8 flowic_tos; | |
34 | __u8 flowic_scope; | |
35 | __u8 flowic_proto; | |
36 | __u8 flowic_flags; | |
fbef0a40 | 37 | #define FLOWI_FLAG_ANYSRC 0x01 |
0e0d44ab | 38 | #define FLOWI_FLAG_KNOWN_NH 0x02 |
c71ad3d4 | 39 | #define FLOWI_FLAG_SKIP_NH_OIF 0x04 |
806566cc | 40 | __u32 flowic_secid; |
622ec2c9 | 41 | kuid_t flowic_uid; |
bf1c3ab8 | 42 | struct flowi_tunnel flowic_tun_key; |
24ba1440 | 43 | __u32 flowic_multipath_hash; |
806566cc DM |
44 | }; |
45 | ||
08704bcb DM |
46 | union flowi_uli { |
47 | struct { | |
08704bcb | 48 | __be16 dport; |
9b12c75b | 49 | __be16 sport; |
08704bcb DM |
50 | } ports; |
51 | ||
52 | struct { | |
53 | __u8 type; | |
54 | __u8 code; | |
55 | } icmpt; | |
56 | ||
57 | struct { | |
08704bcb | 58 | __le16 dport; |
9b12c75b | 59 | __le16 sport; |
08704bcb DM |
60 | } dnports; |
61 | ||
62 | __be32 spi; | |
63 | __be32 gre_key; | |
64 | ||
65 | struct { | |
66 | __u8 type; | |
67 | } mht; | |
68 | }; | |
69 | ||
56bb8059 DM |
70 | struct flowi4 { |
71 | struct flowi_common __fl_common; | |
22bd5b9b DM |
72 | #define flowi4_oif __fl_common.flowic_oif |
73 | #define flowi4_iif __fl_common.flowic_iif | |
74 | #define flowi4_mark __fl_common.flowic_mark | |
75 | #define flowi4_tos __fl_common.flowic_tos | |
76 | #define flowi4_scope __fl_common.flowic_scope | |
77 | #define flowi4_proto __fl_common.flowic_proto | |
78 | #define flowi4_flags __fl_common.flowic_flags | |
79 | #define flowi4_secid __fl_common.flowic_secid | |
1b7179d3 | 80 | #define flowi4_tun_key __fl_common.flowic_tun_key |
622ec2c9 | 81 | #define flowi4_uid __fl_common.flowic_uid |
24ba1440 | 82 | #define flowi4_multipath_hash __fl_common.flowic_multipath_hash |
84f9307c ED |
83 | |
84 | /* (saddr,daddr) must be grouped, same order as in IP header */ | |
56bb8059 | 85 | __be32 saddr; |
84f9307c ED |
86 | __be32 daddr; |
87 | ||
56bb8059 | 88 | union flowi_uli uli; |
9cce96df DM |
89 | #define fl4_sport uli.ports.sport |
90 | #define fl4_dport uli.ports.dport | |
91 | #define fl4_icmp_type uli.icmpt.type | |
92 | #define fl4_icmp_code uli.icmpt.code | |
93 | #define fl4_ipsec_spi uli.spi | |
94 | #define fl4_mh_type uli.mht.type | |
95 | #define fl4_gre_key uli.gre_key | |
728871bc | 96 | } __attribute__((__aligned__(BITS_PER_LONG/8))); |
56bb8059 | 97 | |
83229aa5 DM |
98 | static inline void flowi4_init_output(struct flowi4 *fl4, int oif, |
99 | __u32 mark, __u8 tos, __u8 scope, | |
100 | __u8 proto, __u8 flags, | |
101 | __be32 daddr, __be32 saddr, | |
e2d118a1 LC |
102 | __be16 dport, __be16 sport, |
103 | kuid_t uid) | |
83229aa5 DM |
104 | { |
105 | fl4->flowi4_oif = oif; | |
6a662719 | 106 | fl4->flowi4_iif = LOOPBACK_IFINDEX; |
83229aa5 DM |
107 | fl4->flowi4_mark = mark; |
108 | fl4->flowi4_tos = tos; | |
109 | fl4->flowi4_scope = scope; | |
110 | fl4->flowi4_proto = proto; | |
111 | fl4->flowi4_flags = flags; | |
112 | fl4->flowi4_secid = 0; | |
1b7179d3 | 113 | fl4->flowi4_tun_key.tun_id = 0; |
e2d118a1 | 114 | fl4->flowi4_uid = uid; |
83229aa5 DM |
115 | fl4->daddr = daddr; |
116 | fl4->saddr = saddr; | |
83229aa5 | 117 | fl4->fl4_dport = dport; |
9b12c75b | 118 | fl4->fl4_sport = sport; |
83229aa5 | 119 | } |
e6b45241 JA |
120 | |
121 | /* Reset some input parameters after previous lookup */ | |
122 | static inline void flowi4_update_output(struct flowi4 *fl4, int oif, __u8 tos, | |
123 | __be32 daddr, __be32 saddr) | |
124 | { | |
125 | fl4->flowi4_oif = oif; | |
126 | fl4->flowi4_tos = tos; | |
127 | fl4->daddr = daddr; | |
128 | fl4->saddr = saddr; | |
129 | } | |
82695b30 | 130 | |
83229aa5 | 131 | |
56bb8059 | 132 | struct flowi6 { |
806566cc | 133 | struct flowi_common __fl_common; |
2032656e DM |
134 | #define flowi6_oif __fl_common.flowic_oif |
135 | #define flowi6_iif __fl_common.flowic_iif | |
136 | #define flowi6_mark __fl_common.flowic_mark | |
2032656e DM |
137 | #define flowi6_scope __fl_common.flowic_scope |
138 | #define flowi6_proto __fl_common.flowic_proto | |
139 | #define flowi6_flags __fl_common.flowic_flags | |
140 | #define flowi6_secid __fl_common.flowic_secid | |
904af04d | 141 | #define flowi6_tun_key __fl_common.flowic_tun_key |
622ec2c9 | 142 | #define flowi6_uid __fl_common.flowic_uid |
56bb8059 DM |
143 | struct in6_addr daddr; |
144 | struct in6_addr saddr; | |
69716a2b | 145 | /* Note: flowi6_tos is encoded in flowlabel, too. */ |
56bb8059 DM |
146 | __be32 flowlabel; |
147 | union flowi_uli uli; | |
1958b856 DM |
148 | #define fl6_sport uli.ports.sport |
149 | #define fl6_dport uli.ports.dport | |
150 | #define fl6_icmp_type uli.icmpt.type | |
151 | #define fl6_icmp_code uli.icmpt.code | |
152 | #define fl6_ipsec_spi uli.spi | |
153 | #define fl6_mh_type uli.mht.type | |
154 | #define fl6_gre_key uli.gre_key | |
29825717 | 155 | __u32 mp_hash; |
728871bc | 156 | } __attribute__((__aligned__(BITS_PER_LONG/8))); |
1da177e4 | 157 | |
56bb8059 DM |
158 | struct flowidn { |
159 | struct flowi_common __fl_common; | |
bef55aeb DM |
160 | #define flowidn_oif __fl_common.flowic_oif |
161 | #define flowidn_iif __fl_common.flowic_iif | |
162 | #define flowidn_mark __fl_common.flowic_mark | |
163 | #define flowidn_scope __fl_common.flowic_scope | |
164 | #define flowidn_proto __fl_common.flowic_proto | |
165 | #define flowidn_flags __fl_common.flowic_flags | |
56bb8059 DM |
166 | __le16 daddr; |
167 | __le16 saddr; | |
168 | union flowi_uli uli; | |
bef55aeb DM |
169 | #define fld_sport uli.ports.sport |
170 | #define fld_dport uli.ports.dport | |
728871bc | 171 | } __attribute__((__aligned__(BITS_PER_LONG/8))); |
56bb8059 DM |
172 | |
173 | struct flowi { | |
1da177e4 | 174 | union { |
56bb8059 DM |
175 | struct flowi_common __fl_common; |
176 | struct flowi4 ip4; | |
177 | struct flowi6 ip6; | |
178 | struct flowidn dn; | |
179 | } u; | |
180 | #define flowi_oif u.__fl_common.flowic_oif | |
181 | #define flowi_iif u.__fl_common.flowic_iif | |
182 | #define flowi_mark u.__fl_common.flowic_mark | |
183 | #define flowi_tos u.__fl_common.flowic_tos | |
184 | #define flowi_scope u.__fl_common.flowic_scope | |
185 | #define flowi_proto u.__fl_common.flowic_proto | |
186 | #define flowi_flags u.__fl_common.flowic_flags | |
187 | #define flowi_secid u.__fl_common.flowic_secid | |
1b7179d3 | 188 | #define flowi_tun_key u.__fl_common.flowic_tun_key |
622ec2c9 | 189 | #define flowi_uid u.__fl_common.flowic_uid |
1da177e4 LT |
190 | } __attribute__((__aligned__(BITS_PER_LONG/8))); |
191 | ||
59b1a94c DM |
192 | static inline struct flowi *flowi4_to_flowi(struct flowi4 *fl4) |
193 | { | |
194 | return container_of(fl4, struct flowi, u.ip4); | |
195 | } | |
196 | ||
197 | static inline struct flowi *flowi6_to_flowi(struct flowi6 *fl6) | |
198 | { | |
199 | return container_of(fl6, struct flowi, u.ip6); | |
200 | } | |
201 | ||
202 | static inline struct flowi *flowidn_to_flowi(struct flowidn *fldn) | |
203 | { | |
204 | return container_of(fldn, struct flowi, u.dn); | |
205 | } | |
206 | ||
aa1c366e | 207 | typedef unsigned long flow_compare_t; |
208 | ||
5a17d9ed | 209 | static inline unsigned int flow_key_size(u16 family) |
aa1c366e | 210 | { |
211 | switch (family) { | |
212 | case AF_INET: | |
213 | BUILD_BUG_ON(sizeof(struct flowi4) % sizeof(flow_compare_t)); | |
214 | return sizeof(struct flowi4) / sizeof(flow_compare_t); | |
215 | case AF_INET6: | |
216 | BUILD_BUG_ON(sizeof(struct flowi6) % sizeof(flow_compare_t)); | |
217 | return sizeof(struct flowi6) / sizeof(flow_compare_t); | |
218 | case AF_DECnet: | |
219 | BUILD_BUG_ON(sizeof(struct flowidn) % sizeof(flow_compare_t)); | |
220 | return sizeof(struct flowidn) / sizeof(flow_compare_t); | |
221 | } | |
222 | return 0; | |
223 | } | |
224 | ||
20a17bf6 | 225 | __u32 __get_hash_from_flowi6(const struct flowi6 *fl6, struct flow_keys *keys); |
c6cc1ca7 | 226 | |
1da177e4 | 227 | #endif |