BOND_OPT_AD_SELECT
valptr = bond_opt_parse(bond_opt_get(BOND_OPT_AD_SELECT),
err = __bond_opt_set(bond, BOND_OPT_AD_SELECT, &newval,
[BOND_OPT_AD_SELECT] = {
.id = BOND_OPT_AD_SELECT,
optval = bond_opt_get_val(BOND_OPT_AD_SELECT,
val = bond_opt_get_val(BOND_OPT_AD_SELECT, bond->params.ad_select);