xref: /kernel/linux/linux-6.6/include/net/rtnh.h (revision 62306a36) 
1/* SPDX-License-Identifier: GPL-2.0 */
2#ifndef __NET_RTNH_H
3#define __NET_RTNH_H
4
5#include <linux/rtnetlink.h>
6#include <net/netlink.h>
7
8static inline int rtnh_ok(const struct rtnexthop *rtnh, int remaining)
9{
10	return remaining >= (int)sizeof(*rtnh) &&
11	       rtnh->rtnh_len >= sizeof(*rtnh) &&
12	       rtnh->rtnh_len <= remaining;
13}
14
15static inline struct rtnexthop *rtnh_next(const struct rtnexthop *rtnh,
16                                         int *remaining)
17{
18	int totlen = NLA_ALIGN(rtnh->rtnh_len);
19
20	*remaining -= totlen;
21	return (struct rtnexthop *) ((char *) rtnh + totlen);
22}
23
24static inline struct nlattr *rtnh_attrs(const struct rtnexthop *rtnh)
25{
26	return (struct nlattr *) ((char *) rtnh + NLA_ALIGN(sizeof(*rtnh)));
27}
28
29static inline int rtnh_attrlen(const struct rtnexthop *rtnh)
30{
31	return rtnh->rtnh_len - NLA_ALIGN(sizeof(*rtnh));
32}
33
34#endif
35