assert_se(sd_rtnl_message_new_link(rtnl, &m, RTM_GETLINK, ifindex) >= 0);
assert_se(sd_rtnl_call_async(rtnl, m, &link_handler, ifname, 0, NULL) >= 0);
assert_se(sd_rtnl_message_new_link(rtnl, &m, RTM_GETLINK, ifindex) >= 0);
assert_se(sd_rtnl_call_async(rtnl, m, &link_handler, ifname, 0, NULL) >= 0);