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