/usr/include/netlink/cache.h is in libnl2-dev 2.0-1.
This file is owned by root:root, with mode 0o644.
The actual contents of the file can be viewed below.
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* netlink/cache.h Caching Module
*
* This library is free software; you can redistribute it and/or
* modify it under the terms of the GNU Lesser General Public
* License as published by the Free Software Foundation version 2.1
* of the License.
*
* Copyright (c) 2003-2008 Thomas Graf <tgraf@suug.ch>
*/
#ifndef NETLINK_CACHE_H_
#define NETLINK_CACHE_H_
#include <netlink/netlink.h>
#include <netlink/msg.h>
#include <netlink/utils.h>
#include <netlink/object.h>
#include <netlink/cache-api.h>
#ifdef __cplusplus
extern "C" {
#endif
struct nl_cache;
typedef void (*change_func_t)(struct nl_cache *, struct nl_object *, int, void *);
/* Access Functions */
extern int nl_cache_nitems(struct nl_cache *);
extern int nl_cache_nitems_filter(struct nl_cache *,
struct nl_object *);
extern struct nl_cache_ops * nl_cache_get_ops(struct nl_cache *);
extern struct nl_object * nl_cache_get_first(struct nl_cache *);
extern struct nl_object * nl_cache_get_last(struct nl_cache *);
extern struct nl_object * nl_cache_get_next(struct nl_object *);
extern struct nl_object * nl_cache_get_prev(struct nl_object *);
extern struct nl_cache * nl_cache_alloc(struct nl_cache_ops *);
extern int nl_cache_alloc_and_fill(struct nl_cache_ops *,
struct nl_sock *,
struct nl_cache **);
extern int nl_cache_alloc_name(const char *,
struct nl_cache **);
extern struct nl_cache * nl_cache_subset(struct nl_cache *,
struct nl_object *);
extern void nl_cache_clear(struct nl_cache *);
extern void nl_cache_free(struct nl_cache *);
/* Cache modification */
extern int nl_cache_add(struct nl_cache *,
struct nl_object *);
extern int nl_cache_parse_and_add(struct nl_cache *,
struct nl_msg *);
extern void nl_cache_remove(struct nl_object *);
extern int nl_cache_refill(struct nl_sock *,
struct nl_cache *);
extern int nl_cache_pickup(struct nl_sock *,
struct nl_cache *);
extern int nl_cache_resync(struct nl_sock *,
struct nl_cache *,
change_func_t,
void *);
extern int nl_cache_include(struct nl_cache *,
struct nl_object *,
change_func_t,
void *);
/* General */
extern int nl_cache_is_empty(struct nl_cache *);
extern void nl_cache_mark_all(struct nl_cache *);
/* Dumping */
extern void nl_cache_dump(struct nl_cache *,
struct nl_dump_params *);
extern void nl_cache_dump_filter(struct nl_cache *,
struct nl_dump_params *,
struct nl_object *);
/* Iterators */
extern void nl_cache_foreach(struct nl_cache *,
void (*cb)(struct nl_object *,
void *),
void *arg);
extern void nl_cache_foreach_filter(struct nl_cache *,
struct nl_object *,
void (*cb)(struct
nl_object *,
void *),
void *arg);
/* --- cache management --- */
/* Cache type management */
extern struct nl_cache_ops * nl_cache_ops_lookup(const char *);
extern struct nl_cache_ops * nl_cache_ops_associate(int, int);
extern struct nl_msgtype * nl_msgtype_lookup(struct nl_cache_ops *, int);
extern void nl_cache_ops_foreach(void (*cb)(struct nl_cache_ops *, void *), void *);
extern int nl_cache_mngt_register(struct nl_cache_ops *);
extern int nl_cache_mngt_unregister(struct nl_cache_ops *);
/* Global cache provisioning/requiring */
extern void nl_cache_mngt_provide(struct nl_cache *);
extern void nl_cache_mngt_unprovide(struct nl_cache *);
extern struct nl_cache * nl_cache_mngt_require(const char *);
struct nl_cache_mngr;
#define NL_AUTO_PROVIDE 1
extern int nl_cache_mngr_alloc(struct nl_sock *,
int, int,
struct nl_cache_mngr **);
extern int nl_cache_mngr_add(struct nl_cache_mngr *,
const char *,
change_func_t,
void *,
struct nl_cache **);
extern int nl_cache_mngr_get_fd(struct nl_cache_mngr *);
extern int nl_cache_mngr_poll(struct nl_cache_mngr *,
int);
extern int nl_cache_mngr_data_ready(struct nl_cache_mngr *);
extern void nl_cache_mngr_free(struct nl_cache_mngr *);
#ifdef __cplusplus
}
#endif
#endif
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