diff options
Diffstat (limited to 'include/net/flow_keys.h')
| -rw-r--r-- | include/net/flow_keys.h | 45 |
1 files changed, 45 insertions, 0 deletions
diff --git a/include/net/flow_keys.h b/include/net/flow_keys.h new file mode 100644 index 000000000..dc8fd8141 --- /dev/null +++ b/include/net/flow_keys.h @@ -0,0 +1,45 @@ +#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 |