NL_RTM_GETROUTE
if (nl_type == NL_RTM_GETROUTE) {
struct nlmsghdr *hdr = snl_create_msg_request(&nw, NL_RTM_GETROUTE);
case NL_RTM_GETROUTE:
#define RTM_GETROUTE NL_RTM_GETROUTE
.cmd = NL_RTM_GETROUTE,