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
   7 static inline int rtnh_ok(const struct rtnexthop *rtnh, int remaining)
   8 {
   9         return remaining >= (int)sizeof(*rtnh) &&
  10                rtnh->rtnh_len >= sizeof(*rtnh) &&
  11                rtnh->rtnh_len <= remaining;
  12 }
  13
  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
  23 static inline struct nlattr *rtnh_attrs(const struct rtnexthop *rtnh)
  24 {
  25         return (struct nlattr *) ((char *) rtnh + NLA_ALIGN(sizeof(*rtnh)));
  26 }
  27
  28 static inline int rtnh_attrlen(const struct rtnexthop *rtnh)
  29 {
  30         return rtnh->rtnh_len - NLA_ALIGN(sizeof(*rtnh));
  31 }
  32
  33 #endif