[RFC iproute2-next v1 2/5] include: Add helper to retrieve a __s64 from a netlink msg

[Vinicius Costa Gomes]

This allows signed 64-bit integers to be retrieved from a netlink
message.
---
 include/libnetlink.h | 7 +++++++
 1 file changed, 7 insertions(+)

diff --git a/include/libnetlink.h b/include/libnetlink.h
index 9d9249e6..88164975 100644
--- a/include/libnetlink.h
+++ b/include/libnetlink.h
@@ -185,6 +185,13 @@ static inline __u64 rta_getattr_u64(const struct rtattr 
*rta)
        memcpy(&tmp, RTA_DATA(rta), sizeof(__u64));
        return tmp;
 }
+static inline __s64 rta_getattr_s64(const struct rtattr *rta)
+{
+       __s64 tmp;
+
+       memcpy(&tmp, RTA_DATA(rta), sizeof(__s64));
+       return tmp;
+}
 static inline const char *rta_getattr_str(const struct rtattr *rta)
 {
        return (const char *)RTA_DATA(rta);
-- 
2.18.0