libnetlink: Add helper for getting a __s32 from netlink msgs

This function retrieves a signed 32-bit integer from a netlink message
and returns it.

Signed-off-by: Jesus Sanchez-Palencia <jesus.sanchez-palencia@intel.com>
Signed-off-by: David Ahern <dsahern@gmail.com>

1 files changed, 4 insertions, 0 deletions

diff --git a/include/libnetlink.h b/include/libnetlink.h
index a133470c..04264b87 100644
--- a/include/libnetlink.h
+++ b/include/libnetlink.h
@@ -203,6 +203,10 @@ static inline __u64 rta_getattr_u64(const struct rtattr *rta)
 	memcpy(&tmp, RTA_DATA(rta), sizeof(__u64));
 	return tmp;
 }
+static inline __s32 rta_getattr_s32(const struct rtattr *rta)
+{
+	return *(__s32 *)RTA_DATA(rta);
+}
 static inline __s64 rta_getattr_s64(const struct rtattr *rta)
 {
 	__s64 tmp;