/include/net/nexthop.h

 1#ifndef __NET_NEXTHOP_H
 2#define __NET_NEXTHOP_H
 3
 4#include <linux/rtnetlink.h>
 5#include <net/netlink.h>
 6
 7static 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
14static 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
23static inline struct nlattr *rtnh_attrs(const struct rtnexthop *rtnh)
24{
25	return (struct nlattr *) ((char *) rtnh + NLA_ALIGN(sizeof(*rtnh)));
26}
27
28static inline int rtnh_attrlen(const struct rtnexthop *rtnh)
29{
30	return rtnh->rtnh_len - NLA_ALIGN(sizeof(*rtnh));
31}
32
33#endif