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