diff options
author | Jiri Pirko <jiri@resnulli.us> | 2015-05-12 14:56:07 +0200 |
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committer | David S. Miller <davem@davemloft.net> | 2015-05-13 15:19:45 -0400 |
commit | 1bd758eb1cab2fa5b71a23f9e5d3c8076f4ed650 (patch) | |
tree | 86862ae2e7637daafe814df8fb9f1169a732a282 /include/net/flow_dissector.h | |
parent | 212da1fa60a822f5a7f20d52d11524dadd192a91 (diff) |
net: change name of flow_dissector header to match the .c file name
add couple of empty lines on the way.
Signed-off-by: Jiri Pirko <jiri@resnulli.us>
Signed-off-by: David S. Miller <davem@davemloft.net>
Diffstat (limited to 'include/net/flow_dissector.h')
-rw-r--r-- | include/net/flow_dissector.h | 68 |
1 files changed, 68 insertions, 0 deletions
diff --git a/include/net/flow_dissector.h b/include/net/flow_dissector.h new file mode 100644 index 000000000000..5e99a7b3963c --- /dev/null +++ b/include/net/flow_dissector.h @@ -0,0 +1,68 @@ +#ifndef _NET_FLOW_DISSECTOR_H +#define _NET_FLOW_DISSECTOR_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); + +/* struct flow_keys_digest: + * + * This structure is used to hold a digest of the full flow keys. This is a + * larger "hash" of a flow to allow definitively matching specific flows where + * the 32 bit skb->hash is not large enough. The size is limited to 16 bytes so + * that it can by used in CB of skb (see sch_choke for an example). + */ +#define FLOW_KEYS_DIGEST_LEN 16 +struct flow_keys_digest { + u8 data[FLOW_KEYS_DIGEST_LEN]; +}; + +void make_flow_keys_digest(struct flow_keys_digest *digest, + const struct flow_keys *flow); + +#endif |