BIO_CTRL_SET
case BIO_CTRL_SET:
case BIO_CTRL_SET:
if (cb(bio, BIO_CB_CTRL, (const char *)c, BIO_CTRL_SET, e, 0L) <= 0)
return cb(bio, BIO_CB_CTRL, (const char *)c, BIO_CTRL_SET, e, 1L);
case BIO_CTRL_SET: