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// SPDX-License-Identifier: GPL-2.0-or-later
/*
* libnetlink.c RTnetlink service routines.
*
* Authors: Alexey Kuznetsov, <kuznet@ms2.inr.ac.ru>
*
*/
#ifdef __linux__
#ifndef __LIBNETLINK_H__
#define __LIBNETLINK_H__ 1
#include <asm/types.h>
#include <linux/netlink.h>
#include <linux/rtnetlink.h>
#include <linux/if_link.h>
#include <linux/if_addr.h>
#include <linux/neighbour.h>
struct rtnl_handle {
int fd;
struct sockaddr_nl local;
struct sockaddr_nl peer;
__u32 seq;
__u32 dump;
};
extern int rcvbuf;
extern int rtnl_open(struct rtnl_handle *rth, unsigned subscriptions);
extern int rtnl_open_byproto(struct rtnl_handle *rth, unsigned subscriptions,
int protocol);
extern void rtnl_close(struct rtnl_handle *rth);
extern int rtnl_wilddump_request(struct rtnl_handle *rth, int fam, int type);
extern int rtnl_dump_request(struct rtnl_handle *rth, int type, void *req,
int len);
typedef int (*rtnl_filter_t)(const struct sockaddr_nl *, struct nlmsghdr *n,
void *);
struct rtnl_dump_filter_arg {
rtnl_filter_t filter;
void *arg1;
rtnl_filter_t junk;
void *arg2;
};
extern int rtnl_dump_filter_l(struct rtnl_handle *rth,
const struct rtnl_dump_filter_arg *arg);
extern int rtnl_dump_filter(struct rtnl_handle *rth, rtnl_filter_t filter,
void *arg1, rtnl_filter_t junk, void *arg2);
extern int rtnl_talk(struct rtnl_handle *rtnl, struct nlmsghdr *n, pid_t peer,
unsigned groups, struct nlmsghdr *answer,
rtnl_filter_t junk, void *jarg);
extern int rtnl_send(struct rtnl_handle *rth, const char *buf, int);
extern int rtnl_send_check(struct rtnl_handle *rth, const char *buf, int);
extern int addattr32(struct nlmsghdr *n, int maxlen, int type, __u32 data);
extern int addattr_l(struct nlmsghdr *n, int maxlen, int type, const void *data,
int alen);
extern int addraw_l(struct nlmsghdr *n, int maxlen, const void *data, int len);
extern struct rtattr *addattr_nest(struct nlmsghdr *n, int maxlen, int type);
extern int addattr_nest_end(struct nlmsghdr *n, struct rtattr *nest);
extern struct rtattr *addattr_nest_compat(struct nlmsghdr *n, int maxlen,
int type, const void *data, int len);
extern int addattr_nest_compat_end(struct nlmsghdr *n, struct rtattr *nest);
extern int rta_addattr32(struct rtattr *rta, int maxlen, int type, __u32 data);
extern int rta_addattr_l(struct rtattr *rta, int maxlen, int type,
const void *data, int alen);
extern int parse_rtattr(struct rtattr *tb[], int max, struct rtattr *rta,
int len);
extern int parse_rtattr_byindex(struct rtattr *tb[], int max,
struct rtattr *rta, int len);
extern int __parse_rtattr_nested_compat(struct rtattr *tb[], int max,
struct rtattr *rta, int len);
#define parse_rtattr_nested(tb, max, rta) \
(parse_rtattr((tb), (max), RTA_DATA(rta), RTA_PAYLOAD(rta)))
#define parse_rtattr_nested_compat(tb, max, rta, data, len) \
({ \
data = RTA_PAYLOAD(rta) >= len ? RTA_DATA(rta) : NULL; \
__parse_rtattr_nested_compat(tb, max, rta, len); \
})
extern int rtnl_listen(struct rtnl_handle *, rtnl_filter_t handler, void *jarg);
extern int rtnl_from_file(FILE *, rtnl_filter_t handler, void *jarg);
#define NLMSG_TAIL(nmsg) \
((struct rtattr *)(((uint8_t *)(nmsg)) \
+ NLMSG_ALIGN((nmsg)->nlmsg_len)))
#ifndef IFA_RTA
#define IFA_RTA(r) \
((struct rtattr *)(((char *)(r)) \
+ NLMSG_ALIGN(sizeof(struct ifaddrmsg))))
#endif
#ifndef IFA_PAYLOAD
#define IFA_PAYLOAD(n) NLMSG_PAYLOAD(n,sizeof(struct ifaddrmsg))
#endif
#ifndef IFLA_RTA
#define IFLA_RTA(r) \
((struct rtattr *)(((char *)(r)) \
+ NLMSG_ALIGN(sizeof(struct ifinfomsg))))
#endif
#ifndef IFLA_PAYLOAD
#define IFLA_PAYLOAD(n) NLMSG_PAYLOAD(n,sizeof(struct ifinfomsg))
#endif
#ifndef NDA_RTA
#define NDA_RTA(r) \
((struct rtattr *)(((char *)(r)) + NLMSG_ALIGN(sizeof(struct ndmsg))))
#endif
#ifndef NDA_PAYLOAD
#define NDA_PAYLOAD(n) NLMSG_PAYLOAD(n,sizeof(struct ndmsg))
#endif
#ifndef NDTA_RTA
#define NDTA_RTA(r) \
((struct rtattr *)(((char *)(r)) + NLMSG_ALIGN(sizeof(struct ndtmsg))))
#endif
#ifndef NDTA_PAYLOAD
#define NDTA_PAYLOAD(n) NLMSG_PAYLOAD(n,sizeof(struct ndtmsg))
#endif
#endif /* __LIBNETLINK_H__ */
#endif /* __linux__ */
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