flow_keys.h

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#ifndef _NET_FLOW_KEYS_H
#define _NET_FLOW_KEYS_H

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];
    };
    u8 ip_proto;
};

extern bool skb_flow_dissect(const struct sk_buff *skb, struct flow_keys *flow);
#endif