dl_op
err = dl_op(lh, &mp, DL_OK_ACK, DL_OK_ACK_SIZE, dleap, NULL);
err = dl_op(lh, &mp, DL_BIND_ACK, DL_BIND_ACK_SIZE, dleap, NULL);
err = dl_op(lh, &mp, DL_PHYS_ADDR_ACK, DL_PHYS_ADDR_ACK_SIZE, dleap,
err = dl_op(lh, &mp, DL_INFO_ACK, DL_INFO_ACK_SIZE, dleap, NULL);
err = dl_op(lh, &mp, DL_NOTIFY_ACK, DL_NOTIFY_ACK_SIZE, dleap, NULL);