The ldap_get_values() and ldap_get_values_len()  functions are
    used to retrieve the values of a given attribute from an entry.
    The ldap_count_values() and ldap_count_values_len()  functions
    are used to count the returned values. The ldap_value_free() and
    ldap_value_free_len() functions are used to free the values.

            char **ldap_get_values(
                    LDAP            *ld,
                    LDAPMessage     *entry,
                    char            *attr
            );

            struct berval **ldap_get_values_len(
                    LDAP            *ld,
                    LDAPMessage     *entry,
                    char            *attr
            );

            int ldap_count_values( char **vals )

            int ldap_count_values_len( struct berval **vals );

            void ldap_value_free( char **vals );

            void ldap_value_free_len( struct berval **vals );

    Parameters are as follows:

    ld    The session handle.
    entry The entry from which to retrieve values, as returned by
          ldap_first_entry()  or ldap_next_entry().
    attr  The attribute whose values are to be retrieved, as returned
          by ldap_first_attribute()  or ldap_next_attribute(), or a
          caller- supplied string (for example, "mail").
    vals  The values returned by a previous call to ldap_get_
          values()  or ldap_get_values_len().

    Two forms of the various calls are provided. The first form is
    only suitable for use with non-binary character string data. The
    second _len form is used with any kind of data.

    The ldap_get_values() and ldap_get_values_len()  functions return
    NULL if no values are found for attr or if an error occurs.

    The ldap_count_values() and ldap_count_values_len()  functions
    return -1 if an error occurs such as the vals parameter being
    invalid.

    Note that the values returned are dynamically allocated and
    should be freed by calling either ldap_value_free() or ldap_
    value_free_len() when no longer in use.