/usr/include/libnl3/netlink/route/route.h is in libnl-3-dev 3.2.27-2.
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/route/route.h Routes
*
* 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) 2003-2012 Thomas Graf <tgraf@suug.ch>
*/
#ifndef NETLINK_ROUTE_H_
#define NETLINK_ROUTE_H_
#include <netlink/netlink.h>
#include <netlink/cache.h>
#include <netlink/addr.h>
#include <netlink/data.h>
#include <netlink/route/nexthop.h>
#include <netlink/route/rtnl.h>
#include <linux/in_route.h>
#ifdef __cplusplus
extern "C" {
#endif
/**
* @ingroup route
* When passed to rtnl_route_alloc_cache() the cache will
* correspond to the contents of the routing cache instead
* of the actual routes.
*/
#define ROUTE_CACHE_CONTENT 1
struct rtnl_route;
struct rtnl_rtcacheinfo
{
uint32_t rtci_clntref;
uint32_t rtci_last_use;
uint32_t rtci_expires;
int32_t rtci_error;
uint32_t rtci_used;
uint32_t rtci_id;
uint32_t rtci_ts;
uint32_t rtci_tsage;
};
extern struct nl_object_ops route_obj_ops;
extern struct rtnl_route * rtnl_route_alloc(void);
extern void rtnl_route_put(struct rtnl_route *);
extern int rtnl_route_alloc_cache(struct nl_sock *, int, int,
struct nl_cache **);
extern void rtnl_route_get(struct rtnl_route *);
extern int rtnl_route_parse(struct nlmsghdr *, struct rtnl_route **);
extern int rtnl_route_build_msg(struct nl_msg *, struct rtnl_route *);
extern int rtnl_route_build_add_request(struct rtnl_route *, int,
struct nl_msg **);
extern int rtnl_route_add(struct nl_sock *, struct rtnl_route *, int);
extern int rtnl_route_build_del_request(struct rtnl_route *, int,
struct nl_msg **);
extern int rtnl_route_delete(struct nl_sock *, struct rtnl_route *, int);
extern void rtnl_route_set_table(struct rtnl_route *, uint32_t);
extern uint32_t rtnl_route_get_table(struct rtnl_route *);
extern void rtnl_route_set_scope(struct rtnl_route *, uint8_t);
extern uint8_t rtnl_route_get_scope(struct rtnl_route *);
extern void rtnl_route_set_tos(struct rtnl_route *, uint8_t);
extern uint8_t rtnl_route_get_tos(struct rtnl_route *);
extern void rtnl_route_set_protocol(struct rtnl_route *, uint8_t);
extern uint8_t rtnl_route_get_protocol(struct rtnl_route *);
extern void rtnl_route_set_priority(struct rtnl_route *, uint32_t);
extern uint32_t rtnl_route_get_priority(struct rtnl_route *);
extern int rtnl_route_set_family(struct rtnl_route *, uint8_t);
extern uint8_t rtnl_route_get_family(struct rtnl_route *);
extern int rtnl_route_set_type(struct rtnl_route *, uint8_t);
extern uint8_t rtnl_route_get_type(struct rtnl_route *);
extern void rtnl_route_set_flags(struct rtnl_route *, uint32_t);
extern void rtnl_route_unset_flags(struct rtnl_route *, uint32_t);
extern uint32_t rtnl_route_get_flags(struct rtnl_route *);
extern int rtnl_route_set_metric(struct rtnl_route *, int, unsigned int);
extern int rtnl_route_unset_metric(struct rtnl_route *, int);
extern int rtnl_route_get_metric(struct rtnl_route *, int, uint32_t *);
extern int rtnl_route_set_dst(struct rtnl_route *, struct nl_addr *);
extern struct nl_addr *rtnl_route_get_dst(struct rtnl_route *);
extern int rtnl_route_set_src(struct rtnl_route *, struct nl_addr *);
extern struct nl_addr *rtnl_route_get_src(struct rtnl_route *);
extern int rtnl_route_set_pref_src(struct rtnl_route *, struct nl_addr *);
extern struct nl_addr *rtnl_route_get_pref_src(struct rtnl_route *);
extern void rtnl_route_set_iif(struct rtnl_route *, int);
extern int rtnl_route_get_iif(struct rtnl_route *);
extern int rtnl_route_get_src_len(struct rtnl_route *);
extern void rtnl_route_add_nexthop(struct rtnl_route *,
struct rtnl_nexthop *);
extern void rtnl_route_remove_nexthop(struct rtnl_route *,
struct rtnl_nexthop *);
extern struct nl_list_head *rtnl_route_get_nexthops(struct rtnl_route *);
extern int rtnl_route_get_nnexthops(struct rtnl_route *);
extern void rtnl_route_foreach_nexthop(struct rtnl_route *r,
void (*cb)(struct rtnl_nexthop *, void *),
void *arg);
extern struct rtnl_nexthop * rtnl_route_nexthop_n(struct rtnl_route *r, int n);
extern int rtnl_route_guess_scope(struct rtnl_route *);
extern char * rtnl_route_table2str(int, char *, size_t);
extern int rtnl_route_str2table(const char *);
extern int rtnl_route_read_table_names(const char *);
extern char * rtnl_route_proto2str(int, char *, size_t);
extern int rtnl_route_str2proto(const char *);
extern int rtnl_route_read_protocol_names(const char *);
extern char * rtnl_route_metric2str(int, char *, size_t);
extern int rtnl_route_str2metric(const char *);
#ifdef __cplusplus
}
#endif
#endif
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