nsim_rxsc
if (!secy->nsim_rxsc[idx].used)
secy->nsim_rxsc[idx].used = true;
secy->nsim_rxsc[idx].sci = ctx->rx_sc->sci;
secy->nsim_rxsc[idx].used = false;
memset(&secy->nsim_rxsc[idx], 0, sizeof(secy->nsim_rxsc[idx]));
if (ns_secy->nsim_rxsc[i].sci == sci)
struct nsim_rxsc nsim_rxsc[NSIM_MACSEC_MAX_RXSC_COUNT];