int main(void) {
     struct nl_sock *sock;
     struct nl_cache *cache;

     if (!(sock = nl_socket_alloc())) {
          perror("nl_socket_alloc");
          return -1;
     }

     if (nl_connect(sock, NETLINK_ROUTE) < 0) {
          perror("nl_connect");
          nl_socket_free( sock );
          return -1;
     }

     if (rtnl_link_alloc_cache(sock, AF_UNSPEC, &cache) < 0) {
          perror("rtnl_link_alloc_cache");
          nl_socket_free( sock );
          nl_close( sock );
          return -1;
     }
     {
          int ifindex, rc, flags;
          struct rtnl_link *link = NULL;

          if (!(ifindex = rtnl_link_name2i(cache, "eno1.10"))) {
               perror("rtnl_link_name2i");
               return -1;
          }
          printf("ind: %dn", ifindex);

          if (!(link = rtnl_link_get(cache, ifindex))) {
               perror("rtnl_link_get");
               return -1;
          }

          if (rtnl_link_is_vlan(link)) {
               puts("It's VLAN link");

               /* alas it's not about the 'real' device */
               printf("master: %dn", rtnl_link_get_master(link));
          } else
               puts("It's 'real' link");
     }

     return 0;
}