| #ifndef _NET_FLOW_KEYS_H |
| #define _NET_FLOW_KEYS_H |
| |
| /* struct flow_keys: |
| * @src: source ip address in case of IPv4 |
| * For IPv6 it contains 32bit hash of src address |
| * @dst: destination ip address in case of IPv4 |
| * For IPv6 it contains 32bit hash of dst address |
| * @ports: port numbers of Transport header |
| * port16[0]: src port number |
| * port16[1]: dst port number |
| * @thoff: Transport header offset |
| * @n_proto: Network header protocol (eg. IPv4/IPv6) |
| * @ip_proto: Transport header protocol (eg. TCP/UDP) |
| * All the members, except thoff, are in network byte order. |
| */ |
| struct flow_keys { |
| /* (src,dst) must be grouped, in the same way than in IP header */ |
| __be32 src; |
| __be32 dst; |
| union { |
| __be32 ports; |
| __be16 port16[2]; |
| }; |
| u16 thoff; |
| __be16 n_proto; |
| u8 ip_proto; |
| }; |
| |
| bool __skb_flow_dissect(const struct sk_buff *skb, struct flow_keys *flow, |
| void *data, __be16 proto, int nhoff, int hlen); |
| static inline bool skb_flow_dissect(const struct sk_buff *skb, struct flow_keys *flow) |
| { |
| return __skb_flow_dissect(skb, flow, NULL, 0, 0, 0); |
| } |
| __be32 __skb_flow_get_ports(const struct sk_buff *skb, int thoff, u8 ip_proto, |
| void *data, int hlen_proto); |
| static inline __be32 skb_flow_get_ports(const struct sk_buff *skb, int thoff, u8 ip_proto) |
| { |
| return __skb_flow_get_ports(skb, thoff, ip_proto, NULL, 0); |
| } |
| u32 flow_hash_from_keys(struct flow_keys *keys); |
| unsigned int flow_get_hlen(const unsigned char *data, unsigned int max_len, |
| __be16 protocol); |
| #endif |