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;
65 struct flowi_common __fl_common;
66 #define flowi4_oif __fl_common.flowic_oif
67 #define flowi4_iif __fl_common.flowic_iif
68 #define flowi4_mark __fl_common.flowic_mark
69 #define flowi4_tos __fl_common.flowic_tos
70 #define flowi4_scope __fl_common.flowic_scope
71 #define flowi4_proto __fl_common.flowic_proto
72 #define flowi4_flags __fl_common.flowic_flags
73 #define flowi4_secid __fl_common.flowic_secid
74 #define flowi4_tun_key __fl_common.flowic_tun_key
75 #define flowi4_uid __fl_common.flowic_uid
76 #define flowi4_multipath_hash __fl_common.flowic_multipath_hash
78 /* (saddr,daddr) must be grouped, same order as in IP header */
83 #define fl4_sport uli.ports.sport
84 #define fl4_dport uli.ports.dport
85 #define fl4_icmp_type uli.icmpt.type
86 #define fl4_icmp_code uli.icmpt.code
87 #define fl4_mh_type uli.mht.type
88 #define fl4_gre_key uli.gre_key
89 } __attribute__((__aligned__(BITS_PER_LONG/8)));
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,
95 __be16 dport, __be16 sport,
98 fl4->flowi4_oif = oif;
99 fl4->flowi4_iif = LOOPBACK_IFINDEX;
100 fl4->flowi4_mark = mark;
101 fl4->flowi4_tos = tos;
102 fl4->flowi4_scope = scope;
103 fl4->flowi4_proto = proto;
104 fl4->flowi4_flags = flags;
105 fl4->flowi4_secid = 0;
106 fl4->flowi4_tun_key.tun_id = 0;
107 fl4->flowi4_uid = uid;
110 fl4->fl4_dport = dport;
111 fl4->fl4_sport = sport;
112 fl4->flowi4_multipath_hash = 0;
115 /* Reset some input parameters after previous lookup */
116 static inline void flowi4_update_output(struct flowi4 *fl4, int oif, __u8 tos,
117 __be32 daddr, __be32 saddr)
119 fl4->flowi4_oif = oif;
120 fl4->flowi4_tos = tos;
127 struct flowi_common __fl_common;
128 #define flowi6_oif __fl_common.flowic_oif
129 #define flowi6_iif __fl_common.flowic_iif
130 #define flowi6_mark __fl_common.flowic_mark
131 #define flowi6_scope __fl_common.flowic_scope
132 #define flowi6_proto __fl_common.flowic_proto
133 #define flowi6_flags __fl_common.flowic_flags
134 #define flowi6_secid __fl_common.flowic_secid
135 #define flowi6_tun_key __fl_common.flowic_tun_key
136 #define flowi6_uid __fl_common.flowic_uid
137 struct in6_addr daddr;
138 struct in6_addr saddr;
139 /* Note: flowi6_tos is encoded in flowlabel, too. */
142 #define fl6_sport uli.ports.sport
143 #define fl6_dport uli.ports.dport
144 #define fl6_icmp_type uli.icmpt.type
145 #define fl6_icmp_code uli.icmpt.code
146 #define fl6_mh_type uli.mht.type
147 #define fl6_gre_key uli.gre_key
149 } __attribute__((__aligned__(BITS_PER_LONG/8)));
153 struct flowi_common __fl_common;
157 #define flowi_oif u.__fl_common.flowic_oif
158 #define flowi_iif u.__fl_common.flowic_iif
159 #define flowi_mark u.__fl_common.flowic_mark
160 #define flowi_tos u.__fl_common.flowic_tos
161 #define flowi_scope u.__fl_common.flowic_scope
162 #define flowi_proto u.__fl_common.flowic_proto
163 #define flowi_flags u.__fl_common.flowic_flags
164 #define flowi_secid u.__fl_common.flowic_secid
165 #define flowi_tun_key u.__fl_common.flowic_tun_key
166 #define flowi_uid u.__fl_common.flowic_uid
167 } __attribute__((__aligned__(BITS_PER_LONG/8)));
169 static inline struct flowi *flowi4_to_flowi(struct flowi4 *fl4)
171 return container_of(fl4, struct flowi, u.ip4);
174 static inline struct flowi_common *flowi4_to_flowi_common(struct flowi4 *fl4)
176 return &(fl4->__fl_common);
179 static inline struct flowi *flowi6_to_flowi(struct flowi6 *fl6)
181 return container_of(fl6, struct flowi, u.ip6);
184 static inline struct flowi_common *flowi6_to_flowi_common(struct flowi6 *fl6)
186 return &(fl6->__fl_common);
189 __u32 __get_hash_from_flowi6(const struct flowi6 *fl6, struct flow_keys *keys);