smp_c1
err = smp_c1(k, r, preq, pres, _iat, &ia, _rat, &ra, res);
ret = smp_c1(smp->tk, smp->prnd, smp->preq, smp->prsp,
ret = smp_c1(smp->tk, smp->rrnd, smp->preq, smp->prsp,