1 /* SPDX-License-Identifier: GPL-2.0 */
4 * Generic internet FLOW.
11 #include <linux/socket.h>
12 #include <linux/in6.h>
13 #include <linux/atomic.h>
14 #include <net/flow_dissector.h>
15 #include <linux/uidgid.h>
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
23 #define LOOPBACK_IFINDEX 1
37 #define FLOWI_FLAG_ANYSRC 0x01
38 #define FLOWI_FLAG_KNOWN_NH 0x02
39 #define FLOWI_FLAG_SKIP_NH_OIF 0x04
42 struct flowi_tunnel flowic_tun_key
;
43 __u32 flowic_multipath_hash
;
70 struct flowi_common __fl_common
;
71 #define flowi4_oif __fl_common.flowic_oif
72 #define flowi4_iif __fl_common.flowic_iif
73 #define flowi4_mark __fl_common.flowic_mark
74 #define flowi4_tos __fl_common.flowic_tos
75 #define flowi4_scope __fl_common.flowic_scope
76 #define flowi4_proto __fl_common.flowic_proto
77 #define flowi4_flags __fl_common.flowic_flags
78 #define flowi4_secid __fl_common.flowic_secid
79 #define flowi4_tun_key __fl_common.flowic_tun_key
80 #define flowi4_uid __fl_common.flowic_uid
81 #define flowi4_multipath_hash __fl_common.flowic_multipath_hash
83 /* (saddr,daddr) must be grouped, same order as in IP header */
88 #define fl4_sport uli.ports.sport
89 #define fl4_dport uli.ports.dport
90 #define fl4_icmp_type uli.icmpt.type
91 #define fl4_icmp_code uli.icmpt.code
92 #define fl4_mh_type uli.mht.type
93 #define fl4_gre_key uli.gre_key
94 } __attribute__((__aligned__(BITS_PER_LONG
/8)));
96 static inline void flowi4_init_output(struct flowi4
*fl4
, int oif
,
97 __u32 mark
, __u8 tos
, __u8 scope
,
98 __u8 proto
, __u8 flags
,
99 __be32 daddr
, __be32 saddr
,
100 __be16 dport
, __be16 sport
,
103 fl4
->flowi4_oif
= oif
;
104 fl4
->flowi4_iif
= LOOPBACK_IFINDEX
;
105 fl4
->flowi4_mark
= mark
;
106 fl4
->flowi4_tos
= tos
;
107 fl4
->flowi4_scope
= scope
;
108 fl4
->flowi4_proto
= proto
;
109 fl4
->flowi4_flags
= flags
;
110 fl4
->flowi4_secid
= 0;
111 fl4
->flowi4_tun_key
.tun_id
= 0;
112 fl4
->flowi4_uid
= uid
;
115 fl4
->fl4_dport
= dport
;
116 fl4
->fl4_sport
= sport
;
117 fl4
->flowi4_multipath_hash
= 0;
120 /* Reset some input parameters after previous lookup */
121 static inline void flowi4_update_output(struct flowi4
*fl4
, int oif
, __u8 tos
,
122 __be32 daddr
, __be32 saddr
)
124 fl4
->flowi4_oif
= oif
;
125 fl4
->flowi4_tos
= tos
;
132 struct flowi_common __fl_common
;
133 #define flowi6_oif __fl_common.flowic_oif
134 #define flowi6_iif __fl_common.flowic_iif
135 #define flowi6_mark __fl_common.flowic_mark
136 #define flowi6_scope __fl_common.flowic_scope
137 #define flowi6_proto __fl_common.flowic_proto
138 #define flowi6_flags __fl_common.flowic_flags
139 #define flowi6_secid __fl_common.flowic_secid
140 #define flowi6_tun_key __fl_common.flowic_tun_key
141 #define flowi6_uid __fl_common.flowic_uid
142 struct in6_addr daddr
;
143 struct in6_addr saddr
;
144 /* Note: flowi6_tos is encoded in flowlabel, too. */
147 #define fl6_sport uli.ports.sport
148 #define fl6_dport uli.ports.dport
149 #define fl6_icmp_type uli.icmpt.type
150 #define fl6_icmp_code uli.icmpt.code
151 #define fl6_mh_type uli.mht.type
152 #define fl6_gre_key uli.gre_key
154 } __attribute__((__aligned__(BITS_PER_LONG
/8)));
157 struct flowi_common __fl_common
;
158 #define flowidn_oif __fl_common.flowic_oif
159 #define flowidn_iif __fl_common.flowic_iif
160 #define flowidn_mark __fl_common.flowic_mark
161 #define flowidn_scope __fl_common.flowic_scope
162 #define flowidn_proto __fl_common.flowic_proto
163 #define flowidn_flags __fl_common.flowic_flags
167 #define fld_sport uli.ports.sport
168 #define fld_dport uli.ports.dport
169 } __attribute__((__aligned__(BITS_PER_LONG
/8)));
173 struct flowi_common __fl_common
;
178 #define flowi_oif u.__fl_common.flowic_oif
179 #define flowi_iif u.__fl_common.flowic_iif
180 #define flowi_mark u.__fl_common.flowic_mark
181 #define flowi_tos u.__fl_common.flowic_tos
182 #define flowi_scope u.__fl_common.flowic_scope
183 #define flowi_proto u.__fl_common.flowic_proto
184 #define flowi_flags u.__fl_common.flowic_flags
185 #define flowi_secid u.__fl_common.flowic_secid
186 #define flowi_tun_key u.__fl_common.flowic_tun_key
187 #define flowi_uid u.__fl_common.flowic_uid
188 } __attribute__((__aligned__(BITS_PER_LONG
/8)));
190 static inline struct flowi
*flowi4_to_flowi(struct flowi4
*fl4
)
192 return container_of(fl4
, struct flowi
, u
.ip4
);
195 static inline struct flowi_common
*flowi4_to_flowi_common(struct flowi4
*fl4
)
197 return &(flowi4_to_flowi(fl4
)->u
.__fl_common
);
200 static inline struct flowi
*flowi6_to_flowi(struct flowi6
*fl6
)
202 return container_of(fl6
, struct flowi
, u
.ip6
);
205 static inline struct flowi_common
*flowi6_to_flowi_common(struct flowi6
*fl6
)
207 return &(flowi6_to_flowi(fl6
)->u
.__fl_common
);
210 static inline struct flowi
*flowidn_to_flowi(struct flowidn
*fldn
)
212 return container_of(fldn
, struct flowi
, u
.dn
);
215 __u32
__get_hash_from_flowi6(const struct flowi6
*fl6
, struct flow_keys
*keys
);