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
8 static 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
15 static 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
24 static inline struct nlattr *rtnh_attrs(const struct rtnexthop *rtnh)
25 {
26 return (struct nlattr *) ((char *) rtnh + NLA_ALIGN(sizeof(*rtnh)));
27 }
28
29 static inline int rtnh_attrlen(const struct rtnexthop *rtnh)
30 {
31 return rtnh->rtnh_len - NLA_ALIGN(sizeof(*rtnh));
32 }
33
34 #endif
35
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