1/* SPDX-License-Identifier: GPL-2.0 */
2#ifndef __NET_NEXTHOP_H
3#define __NET_NEXTHOP_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