Commit | Line | Data |
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1bd758eb JP |
1 | #ifndef _NET_FLOW_DISSECTOR_H |
2 | #define _NET_FLOW_DISSECTOR_H | |
0744dd00 | 3 | |
c3f8eaeb | 4 | #include <linux/types.h> |
b924933c | 5 | #include <linux/in6.h> |
67a900cc | 6 | #include <uapi/linux/if_ether.h> |
c3f8eaeb | 7 | |
42aecaa9 TH |
8 | /** |
9 | * struct flow_dissector_key_control: | |
10 | * @thoff: Transport header offset | |
11 | */ | |
12 | struct flow_dissector_key_control { | |
13 | u16 thoff; | |
c3f83241 | 14 | u16 addr_type; |
807e165d TH |
15 | u32 is_fragment:1; |
16 | u32 first_frag:1; | |
42aecaa9 TH |
17 | }; |
18 | ||
fbff949e JP |
19 | /** |
20 | * struct flow_dissector_key_basic: | |
21 | * @thoff: Transport header offset | |
22 | * @n_proto: Network header protocol (eg. IPv4/IPv6) | |
23 | * @ip_proto: Transport header protocol (eg. TCP/UDP) | |
24 | */ | |
25 | struct flow_dissector_key_basic { | |
fbff949e JP |
26 | __be16 n_proto; |
27 | u8 ip_proto; | |
42aecaa9 | 28 | u8 padding; |
fbff949e JP |
29 | }; |
30 | ||
d34af823 | 31 | struct flow_dissector_key_tags { |
87ee9e52 TH |
32 | u32 vlan_id:12, |
33 | flow_label:20; | |
d34af823 TH |
34 | }; |
35 | ||
1fdd512c TH |
36 | struct flow_dissector_key_keyid { |
37 | __be32 keyid; | |
38 | }; | |
39 | ||
fbff949e | 40 | /** |
c3f83241 TH |
41 | * struct flow_dissector_key_ipv4_addrs: |
42 | * @src: source ip address | |
43 | * @dst: destination ip address | |
fbff949e | 44 | */ |
c3f83241 | 45 | struct flow_dissector_key_ipv4_addrs { |
fbff949e JP |
46 | /* (src,dst) must be grouped, in the same way than in IP header */ |
47 | __be32 src; | |
48 | __be32 dst; | |
49 | }; | |
50 | ||
c3f83241 TH |
51 | /** |
52 | * struct flow_dissector_key_ipv6_addrs: | |
53 | * @src: source ip address | |
54 | * @dst: destination ip address | |
55 | */ | |
56 | struct flow_dissector_key_ipv6_addrs { | |
57 | /* (src,dst) must be grouped, in the same way than in IP header */ | |
58 | struct in6_addr src; | |
59 | struct in6_addr dst; | |
60 | }; | |
61 | ||
9f249089 TH |
62 | /** |
63 | * struct flow_dissector_key_tipc_addrs: | |
64 | * @srcnode: source node address | |
65 | */ | |
66 | struct flow_dissector_key_tipc_addrs { | |
67 | __be32 srcnode; | |
68 | }; | |
69 | ||
c3f83241 TH |
70 | /** |
71 | * struct flow_dissector_key_addrs: | |
72 | * @v4addrs: IPv4 addresses | |
73 | * @v6addrs: IPv6 addresses | |
74 | */ | |
75 | struct flow_dissector_key_addrs { | |
76 | union { | |
77 | struct flow_dissector_key_ipv4_addrs v4addrs; | |
78 | struct flow_dissector_key_ipv6_addrs v6addrs; | |
9f249089 | 79 | struct flow_dissector_key_tipc_addrs tipcaddrs; |
c3f83241 TH |
80 | }; |
81 | }; | |
82 | ||
fbff949e JP |
83 | /** |
84 | * flow_dissector_key_tp_ports: | |
85 | * @ports: port numbers of Transport header | |
59346afe JP |
86 | * src: source port number |
87 | * dst: destination port number | |
fbff949e JP |
88 | */ |
89 | struct flow_dissector_key_ports { | |
90 | union { | |
91 | __be32 ports; | |
59346afe JP |
92 | struct { |
93 | __be16 src; | |
94 | __be16 dst; | |
95 | }; | |
fbff949e JP |
96 | }; |
97 | }; | |
98 | ||
b924933c | 99 | |
67a900cc JP |
100 | /** |
101 | * struct flow_dissector_key_eth_addrs: | |
102 | * @src: source Ethernet address | |
103 | * @dst: destination Ethernet address | |
104 | */ | |
105 | struct flow_dissector_key_eth_addrs { | |
106 | /* (dst,src) must be grouped, in the same way than in ETH header */ | |
107 | unsigned char dst[ETH_ALEN]; | |
108 | unsigned char src[ETH_ALEN]; | |
109 | }; | |
110 | ||
fbff949e | 111 | enum flow_dissector_key_id { |
42aecaa9 | 112 | FLOW_DISSECTOR_KEY_CONTROL, /* struct flow_dissector_key_control */ |
fbff949e | 113 | FLOW_DISSECTOR_KEY_BASIC, /* struct flow_dissector_key_basic */ |
c3f83241 TH |
114 | FLOW_DISSECTOR_KEY_IPV4_ADDRS, /* struct flow_dissector_key_ipv4_addrs */ |
115 | FLOW_DISSECTOR_KEY_IPV6_ADDRS, /* struct flow_dissector_key_ipv6_addrs */ | |
fbff949e | 116 | FLOW_DISSECTOR_KEY_PORTS, /* struct flow_dissector_key_ports */ |
67a900cc | 117 | FLOW_DISSECTOR_KEY_ETH_ADDRS, /* struct flow_dissector_key_eth_addrs */ |
9f249089 | 118 | FLOW_DISSECTOR_KEY_TIPC_ADDRS, /* struct flow_dissector_key_tipc_addrs */ |
d34af823 | 119 | FLOW_DISSECTOR_KEY_VLANID, /* struct flow_dissector_key_flow_tags */ |
87ee9e52 | 120 | FLOW_DISSECTOR_KEY_FLOW_LABEL, /* struct flow_dissector_key_flow_tags */ |
1fdd512c | 121 | FLOW_DISSECTOR_KEY_GRE_KEYID, /* struct flow_dissector_key_keyid */ |
b3baa0fb | 122 | FLOW_DISSECTOR_KEY_MPLS_ENTROPY, /* struct flow_dissector_key_keyid */ |
fbff949e JP |
123 | |
124 | FLOW_DISSECTOR_KEY_MAX, | |
125 | }; | |
126 | ||
807e165d | 127 | #define FLOW_DISSECTOR_F_PARSE_1ST_FRAG BIT(0) |
8306b688 | 128 | #define FLOW_DISSECTOR_F_STOP_AT_L3 BIT(1) |
807e165d | 129 | |
fbff949e JP |
130 | struct flow_dissector_key { |
131 | enum flow_dissector_key_id key_id; | |
132 | size_t offset; /* offset of struct flow_dissector_key_* | |
133 | in target the struct */ | |
134 | }; | |
135 | ||
136 | struct flow_dissector { | |
137 | unsigned int used_keys; /* each bit repesents presence of one key id */ | |
138 | unsigned short int offset[FLOW_DISSECTOR_KEY_MAX]; | |
139 | }; | |
140 | ||
06635a35 | 141 | struct flow_keys { |
42aecaa9 TH |
142 | struct flow_dissector_key_control control; |
143 | #define FLOW_KEYS_HASH_START_FIELD basic | |
06635a35 | 144 | struct flow_dissector_key_basic basic; |
d34af823 | 145 | struct flow_dissector_key_tags tags; |
1fdd512c | 146 | struct flow_dissector_key_keyid keyid; |
42aecaa9 TH |
147 | struct flow_dissector_key_ports ports; |
148 | struct flow_dissector_key_addrs addrs; | |
06635a35 JP |
149 | }; |
150 | ||
42aecaa9 TH |
151 | #define FLOW_KEYS_HASH_OFFSET \ |
152 | offsetof(struct flow_keys, FLOW_KEYS_HASH_START_FIELD) | |
153 | ||
c3f83241 TH |
154 | __be32 flow_get_u32_src(const struct flow_keys *flow); |
155 | __be32 flow_get_u32_dst(const struct flow_keys *flow); | |
156 | ||
06635a35 JP |
157 | extern struct flow_dissector flow_keys_dissector; |
158 | extern struct flow_dissector flow_keys_buf_dissector; | |
159 | ||
2f59e1eb TH |
160 | /* struct flow_keys_digest: |
161 | * | |
162 | * This structure is used to hold a digest of the full flow keys. This is a | |
163 | * larger "hash" of a flow to allow definitively matching specific flows where | |
164 | * the 32 bit skb->hash is not large enough. The size is limited to 16 bytes so | |
165 | * that it can by used in CB of skb (see sch_choke for an example). | |
166 | */ | |
167 | #define FLOW_KEYS_DIGEST_LEN 16 | |
168 | struct flow_keys_digest { | |
169 | u8 data[FLOW_KEYS_DIGEST_LEN]; | |
170 | }; | |
171 | ||
172 | void make_flow_keys_digest(struct flow_keys_digest *digest, | |
173 | const struct flow_keys *flow); | |
174 | ||
bcc83839 TH |
175 | static inline bool flow_keys_have_l4(struct flow_keys *keys) |
176 | { | |
177 | return (keys->ports.ports || keys->tags.flow_label); | |
178 | } | |
179 | ||
c6cc1ca7 TH |
180 | u32 flow_hash_from_keys(struct flow_keys *keys); |
181 | ||
0744dd00 | 182 | #endif |