flow_keys: Record IP layer protocol in skb_flow_dissect()

[cascardo/linux.git] / include / net / flow_keys.h

diff --git a/include/net/flow_keys.h b/include/net/flow_keys.h
index 7e64bd8..fbefdca 100644 (file)
--- a/include/net/flow_keys.h
+++ b/include/net/flow_keys.h
@@ -1,6 +1,19 @@
 #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;
@@ -10,6 +23,7 @@ struct flow_keys {
                __be16 port16[2];
        };
        u16 thoff;
+       u16 n_proto;
        u8 ip_proto;
 };