The ldap_first_entry() and ldap_next_entry()  functions are
    used to step through and retrieve the list of entries from a
    search result chain. The ldap_first_reference() and ldap_next_
    reference() functions are used to step through and retrieve the
    list of continuation references from a search result chain. The
    ldap_count_entries() function is used to count the number of
    entries returned. The ldap_count_references() function is used to
    count the number of references returned.

     LDAPMessage *ldap_first_entry( LDAP *ld, LDAPMessage *res );

     LDAPMessage *ldap_next_entry( LDAP *ld, LDAPMessage *entry );

     LDAPMessage *ldap_first_reference( LDAP *ld, LDAPMessage *res );

     LDAPMessage *ldap_next_reference( LDAP *ld, LDAPMessage *ref );

     int ldap_count_entries( LDAP *ld, LDAPMessage *res );

     int ldap_count_references( LDAP *ld, LDAPMessage *res );

    Parameters are as follows:

    ld    The session handle.
    res   The search result, as obtained by a call to one of the
          synchronous search functions or ldap_result().
    entry The entry returned by a previous call to ldap_first_
          entry()  or ldap_next_entry().

    The ldap_first_entry() and ldap_next_entry()  functions will
    return NULL when no more entries or references exist in the
    result set to be returned. NULL is also returned if an error
    occurs while stepping through the entries, in which case the
    error parameters in the session handle ld will be set to indicate
    the error.

    The ldap_count_entries() function returns the number of entries
    contained in a chain of entries. It can also be used to count
    the number of entries that remain in a chain if called with a
    message, entry or reference returned by ldap_first_message(),
    ldap_next_message(), ldap_first_entry(),  ldap_next_entry(),
    ldap_first_reference(), ldap_next_reference().

    The ldap_count_references() function returns the number of
    references contained in a chain of search results. It can also be
    used to count the number of references that remain in a chain.