xref: /OK3568_Linux_fs/kernel/include/net/rtnh.h (revision 4882a59341e53eb6f0b4789bf948001014eff981) 
1*4882a593Smuzhiyun /* SPDX-License-Identifier: GPL-2.0 */
2*4882a593Smuzhiyun #ifndef __NET_RTNH_H
3*4882a593Smuzhiyun #define __NET_RTNH_H
4*4882a593Smuzhiyun 
5*4882a593Smuzhiyun #include <linux/rtnetlink.h>
6*4882a593Smuzhiyun #include <net/netlink.h>
7*4882a593Smuzhiyun 
rtnh_ok(const struct rtnexthop * rtnh,int remaining)8*4882a593Smuzhiyun static inline int rtnh_ok(const struct rtnexthop *rtnh, int remaining)
9*4882a593Smuzhiyun {
10*4882a593Smuzhiyun 	return remaining >= (int)sizeof(*rtnh) &&
11*4882a593Smuzhiyun 	       rtnh->rtnh_len >= sizeof(*rtnh) &&
12*4882a593Smuzhiyun 	       rtnh->rtnh_len <= remaining;
13*4882a593Smuzhiyun }
14*4882a593Smuzhiyun 
rtnh_next(const struct rtnexthop * rtnh,int * remaining)15*4882a593Smuzhiyun static inline struct rtnexthop *rtnh_next(const struct rtnexthop *rtnh,
16*4882a593Smuzhiyun                                          int *remaining)
17*4882a593Smuzhiyun {
18*4882a593Smuzhiyun 	int totlen = NLA_ALIGN(rtnh->rtnh_len);
19*4882a593Smuzhiyun 
20*4882a593Smuzhiyun 	*remaining -= totlen;
21*4882a593Smuzhiyun 	return (struct rtnexthop *) ((char *) rtnh + totlen);
22*4882a593Smuzhiyun }
23*4882a593Smuzhiyun 
rtnh_attrs(const struct rtnexthop * rtnh)24*4882a593Smuzhiyun static inline struct nlattr *rtnh_attrs(const struct rtnexthop *rtnh)
25*4882a593Smuzhiyun {
26*4882a593Smuzhiyun 	return (struct nlattr *) ((char *) rtnh + NLA_ALIGN(sizeof(*rtnh)));
27*4882a593Smuzhiyun }
28*4882a593Smuzhiyun 
rtnh_attrlen(const struct rtnexthop * rtnh)29*4882a593Smuzhiyun static inline int rtnh_attrlen(const struct rtnexthop *rtnh)
30*4882a593Smuzhiyun {
31*4882a593Smuzhiyun 	return rtnh->rtnh_len - NLA_ALIGN(sizeof(*rtnh));
32*4882a593Smuzhiyun }
33*4882a593Smuzhiyun 
34*4882a593Smuzhiyun #endif
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