LDAP does not support a read operation directly. Instead, this
    operation is emulated by a search with base set to the DN of the
    entry to read, scope set to LDAP_SCOPE_BASE, and filter set to
    "(objectclass=*)" or NULL. The attrs parameter contains the list
    of attributes to return.

    LDAP does not support a list operation directly. Instead, this
    operation is emulated by a search with base set to the DN of the
    entry to list, scope set to LDAP_SCOPE_ONELEVEL, and filter set
    to "(objectclass=*)" or NULL. The attrs parameter contains the
    list of attributes to return for each child entry.