root/include/net/netevent.h

#ifndef _NET_EVENT_H
#define _NET_EVENT_H

/*
 *      Generic netevent notifiers
 *
 *      Authors:
 *      Tom Tucker              <tom@opengridcomputing.com>
 *      Steve Wise              <swise@opengridcomputing.com>
 *
 *      Changes:
 */

struct dst_entry;
struct neighbour;

struct netevent_redirect {
        struct dst_entry *old;
        struct dst_entry *new;
        struct neighbour *neigh;
        const void *daddr;
};

enum netevent_notif_type {
        NETEVENT_NEIGH_UPDATE = 1, /* arg is struct neighbour ptr */
        NETEVENT_REDIRECT,         /* arg is struct netevent_redirect ptr */
};

int register_netevent_notifier(struct notifier_block *nb);
int unregister_netevent_notifier(struct notifier_block *nb);
int call_netevent_notifiers(unsigned long val, void *v);

#endif