xref: /openbmc/linux/include/net/rtnh.h (revision 3c618c1d) 
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 
rtnh_ok(const struct rtnexthop * rtnh,int remaining)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 
rtnh_next(const struct rtnexthop * rtnh,int * remaining)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 
rtnh_attrs(const struct rtnexthop * rtnh)24 static inline struct nlattr *rtnh_attrs(const struct rtnexthop *rtnh)
25 {
26 	return (struct nlattr *) ((char *) rtnh + NLA_ALIGN(sizeof(*rtnh)));
27 }
28 
rtnh_attrlen(const struct rtnexthop * rtnh)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