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-rw-r--r--include/net/rtnh.h34
1 files changed, 34 insertions, 0 deletions
diff --git a/include/net/rtnh.h b/include/net/rtnh.h
new file mode 100644
index 000000000..aa2cfc508
--- /dev/null
+++ b/include/net/rtnh.h
@@ -0,0 +1,34 @@
+/* SPDX-License-Identifier: GPL-2.0 */
+#ifndef __NET_RTNH_H
+#define __NET_RTNH_H
+
+#include <linux/rtnetlink.h>
+#include <net/netlink.h>
+
+static inline int rtnh_ok(const struct rtnexthop *rtnh, int remaining)
+{
+ return remaining >= (int)sizeof(*rtnh) &&
+ rtnh->rtnh_len >= sizeof(*rtnh) &&
+ rtnh->rtnh_len <= remaining;
+}
+
+static inline struct rtnexthop *rtnh_next(const struct rtnexthop *rtnh,
+ int *remaining)
+{
+ int totlen = NLA_ALIGN(rtnh->rtnh_len);
+
+ *remaining -= totlen;
+ return (struct rtnexthop *) ((char *) rtnh + totlen);
+}
+
+static inline struct nlattr *rtnh_attrs(const struct rtnexthop *rtnh)
+{
+ return (struct nlattr *) ((char *) rtnh + NLA_ALIGN(sizeof(*rtnh)));
+}
+
+static inline int rtnh_attrlen(const struct rtnexthop *rtnh)
+{
+ return rtnh->rtnh_len - NLA_ALIGN(sizeof(*rtnh));
+}
+
+#endif