blob: aa2cfc508f7c237dc47b68f0de751b5d06c702e6 [file] [log] [blame]
Greg Kroah-Hartmanb2441312017-11-01 15:07:57 +01001/* SPDX-License-Identifier: GPL-2.0 */
David Ahern3c618c12019-04-20 09:28:20 -07002#ifndef __NET_RTNH_H
3#define __NET_RTNH_H
Thomas Graf4e902c52006-08-17 18:14:52 -07004
5#include <linux/rtnetlink.h>
6#include <net/netlink.h>
7
8static inline int rtnh_ok(const struct rtnexthop *rtnh, int remaining)
9{
Eric Dumazetb1993a22018-04-07 13:42:38 -070010 return remaining >= (int)sizeof(*rtnh) &&
Thomas Graf4e902c52006-08-17 18:14:52 -070011 rtnh->rtnh_len >= sizeof(*rtnh) &&
12 rtnh->rtnh_len <= remaining;
13}
14
15static 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
24static inline struct nlattr *rtnh_attrs(const struct rtnexthop *rtnh)
25{
26 return (struct nlattr *) ((char *) rtnh + NLA_ALIGN(sizeof(*rtnh)));
27}
28
29static inline int rtnh_attrlen(const struct rtnexthop *rtnh)
30{
31 return rtnh->rtnh_len - NLA_ALIGN(sizeof(*rtnh));
32}
33
34#endif