Linux kernel mirror (for testing)
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1#ifndef _NET_FLOW_KEYS_H
2#define _NET_FLOW_KEYS_H
3
4/* struct flow_keys:
5 * @src: source ip address in case of IPv4
6 * For IPv6 it contains 32bit hash of src address
7 * @dst: destination ip address in case of IPv4
8 * For IPv6 it contains 32bit hash of dst address
9 * @ports: port numbers of Transport header
10 * port16[0]: src port number
11 * port16[1]: dst port number
12 * @thoff: Transport header offset
13 * @n_proto: Network header protocol (eg. IPv4/IPv6)
14 * @ip_proto: Transport header protocol (eg. TCP/UDP)
15 * All the members, except thoff, are in network byte order.
16 */
17struct flow_keys {
18 /* (src,dst) must be grouped, in the same way than in IP header */
19 __be32 src;
20 __be32 dst;
21 union {
22 __be32 ports;
23 __be16 port16[2];
24 };
25 u16 thoff;
26 __be16 n_proto;
27 u8 ip_proto;
28};
29
30bool __skb_flow_dissect(const struct sk_buff *skb, struct flow_keys *flow,
31 void *data, __be16 proto, int nhoff, int hlen);
32static inline bool skb_flow_dissect(const struct sk_buff *skb, struct flow_keys *flow)
33{
34 return __skb_flow_dissect(skb, flow, NULL, 0, 0, 0);
35}
36__be32 __skb_flow_get_ports(const struct sk_buff *skb, int thoff, u8 ip_proto,
37 void *data, int hlen_proto);
38static inline __be32 skb_flow_get_ports(const struct sk_buff *skb, int thoff, u8 ip_proto)
39{
40 return __skb_flow_get_ports(skb, thoff, ip_proto, NULL, 0);
41}
42u32 flow_hash_from_keys(struct flow_keys *keys);
43unsigned int flow_get_hlen(const unsigned char *data, unsigned int max_len,
44 __be16 protocol);
45#endif