3 * Generic internet FLOW.
10 #include <linux/socket.h>
11 #include <linux/in6.h>
12 #include <linux/atomic.h>
13 #include <net/flow_dissector.h>
14 #include <linux/uidgid.h>
17 * ifindex generation is per-net namespace, and loopback is
18 * always the 1st device in ns (see net_dev_init), thus any
19 * loopback device should get ifindex 1
22 #define LOOPBACK_IFINDEX 1
36 #define FLOWI_FLAG_ANYSRC 0x01
37 #define FLOWI_FLAG_KNOWN_NH 0x02
38 #define FLOWI_FLAG_SKIP_NH_OIF 0x04
40 struct flowi_tunnel flowic_tun_key
;
69 struct flowi_common __fl_common
;
70 #define flowi4_oif __fl_common.flowic_oif
71 #define flowi4_iif __fl_common.flowic_iif
72 #define flowi4_mark __fl_common.flowic_mark
73 #define flowi4_tos __fl_common.flowic_tos
74 #define flowi4_scope __fl_common.flowic_scope
75 #define flowi4_proto __fl_common.flowic_proto
76 #define flowi4_flags __fl_common.flowic_flags
77 #define flowi4_secid __fl_common.flowic_secid
78 #define flowi4_tun_key __fl_common.flowic_tun_key
79 #define flowi4_uid __fl_common.flowic_uid
81 /* (saddr,daddr) must be grouped, same order as in IP header */
86 #define fl4_sport uli.ports.sport
87 #define fl4_dport uli.ports.dport
88 #define fl4_icmp_type uli.icmpt.type
89 #define fl4_icmp_code uli.icmpt.code
90 #define fl4_ipsec_spi uli.spi
91 #define fl4_mh_type uli.mht.type
92 #define fl4_gre_key uli.gre_key
93 } __attribute__((__aligned__(BITS_PER_LONG
/8)));
95 static inline void flowi4_init_output(struct flowi4
*fl4
, int oif
,
96 __u32 mark
, __u8 tos
, __u8 scope
,
97 __u8 proto
, __u8 flags
,
98 __be32 daddr
, __be32 saddr
,
99 __be16 dport
, __be16 sport
,
102 fl4
->flowi4_oif
= oif
;
103 fl4
->flowi4_iif
= LOOPBACK_IFINDEX
;
104 fl4
->flowi4_mark
= mark
;
105 fl4
->flowi4_tos
= tos
;
106 fl4
->flowi4_scope
= scope
;
107 fl4
->flowi4_proto
= proto
;
108 fl4
->flowi4_flags
= flags
;
109 fl4
->flowi4_secid
= 0;
110 fl4
->flowi4_tun_key
.tun_id
= 0;
111 fl4
->flowi4_uid
= uid
;
114 fl4
->fl4_dport
= dport
;
115 fl4
->fl4_sport
= sport
;
118 /* Reset some input parameters after previous lookup */
119 static inline void flowi4_update_output(struct flowi4
*fl4
, int oif
, __u8 tos
,
120 __be32 daddr
, __be32 saddr
)
122 fl4
->flowi4_oif
= oif
;
123 fl4
->flowi4_tos
= tos
;
130 struct flowi_common __fl_common
;
131 #define flowi6_oif __fl_common.flowic_oif
132 #define flowi6_iif __fl_common.flowic_iif
133 #define flowi6_mark __fl_common.flowic_mark
134 #define flowi6_scope __fl_common.flowic_scope
135 #define flowi6_proto __fl_common.flowic_proto
136 #define flowi6_flags __fl_common.flowic_flags
137 #define flowi6_secid __fl_common.flowic_secid
138 #define flowi6_tun_key __fl_common.flowic_tun_key
139 #define flowi6_uid __fl_common.flowic_uid
140 struct in6_addr daddr
;
141 struct in6_addr saddr
;
142 /* Note: flowi6_tos is encoded in flowlabel, too. */
145 #define fl6_sport uli.ports.sport
146 #define fl6_dport uli.ports.dport
147 #define fl6_icmp_type uli.icmpt.type
148 #define fl6_icmp_code uli.icmpt.code
149 #define fl6_ipsec_spi uli.spi
150 #define fl6_mh_type uli.mht.type
151 #define fl6_gre_key uli.gre_key
153 } __attribute__((__aligned__(BITS_PER_LONG
/8)));
156 struct flowi_common __fl_common
;
157 #define flowidn_oif __fl_common.flowic_oif
158 #define flowidn_iif __fl_common.flowic_iif
159 #define flowidn_mark __fl_common.flowic_mark
160 #define flowidn_scope __fl_common.flowic_scope
161 #define flowidn_proto __fl_common.flowic_proto
162 #define flowidn_flags __fl_common.flowic_flags
166 #define fld_sport uli.ports.sport
167 #define fld_dport uli.ports.dport
168 } __attribute__((__aligned__(BITS_PER_LONG
/8)));
172 struct flowi_common __fl_common
;
177 #define flowi_oif u.__fl_common.flowic_oif
178 #define flowi_iif u.__fl_common.flowic_iif
179 #define flowi_mark u.__fl_common.flowic_mark
180 #define flowi_tos u.__fl_common.flowic_tos
181 #define flowi_scope u.__fl_common.flowic_scope
182 #define flowi_proto u.__fl_common.flowic_proto
183 #define flowi_flags u.__fl_common.flowic_flags
184 #define flowi_secid u.__fl_common.flowic_secid
185 #define flowi_tun_key u.__fl_common.flowic_tun_key
186 #define flowi_uid u.__fl_common.flowic_uid
187 } __attribute__((__aligned__(BITS_PER_LONG
/8)));
189 static inline struct flowi
*flowi4_to_flowi(struct flowi4
*fl4
)
191 return container_of(fl4
, struct flowi
, u
.ip4
);
194 static inline struct flowi
*flowi6_to_flowi(struct flowi6
*fl6
)
196 return container_of(fl6
, struct flowi
, u
.ip6
);
199 static inline struct flowi
*flowidn_to_flowi(struct flowidn
*fldn
)
201 return container_of(fldn
, struct flowi
, u
.dn
);
204 typedef unsigned long flow_compare_t
;
206 static inline unsigned int flow_key_size(u16 family
)
210 BUILD_BUG_ON(sizeof(struct flowi4
) % sizeof(flow_compare_t
));
211 return sizeof(struct flowi4
) / sizeof(flow_compare_t
);
213 BUILD_BUG_ON(sizeof(struct flowi6
) % sizeof(flow_compare_t
));
214 return sizeof(struct flowi6
) / sizeof(flow_compare_t
);
216 BUILD_BUG_ON(sizeof(struct flowidn
) % sizeof(flow_compare_t
));
217 return sizeof(struct flowidn
) / sizeof(flow_compare_t
);
222 __u32
__get_hash_from_flowi6(const struct flowi6
*fl6
, struct flow_keys
*keys
);
224 static inline __u32
get_hash_from_flowi6(const struct flowi6
*fl6
)
226 struct flow_keys keys
;
228 return __get_hash_from_flowi6(fl6
, &keys
);
231 __u32
__get_hash_from_flowi4(const struct flowi4
*fl4
, struct flow_keys
*keys
);
233 static inline __u32
get_hash_from_flowi4(const struct flowi4
*fl4
)
235 struct flow_keys keys
;
237 return __get_hash_from_flowi4(fl4
, &keys
);