autogroup.c 57.3 KB
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/* autogroup.c - automatic group overlay */
/* $OpenLDAP$ */
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/* This work is part of OpenLDAP Software <http://www.openldap.org/>.
 *
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 * Copyright 2007-2011 The OpenLDAP Foundation.
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 * Portions Copyright 2007 Michał Szulczyński.
 * Portions Copyright 2009 Howard Chu.
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 * All rights reserved.
 *
 * Redistribution and use in source and binary forms, with or without
 * modification, are permitted only as authorized by the OpenLDAP
 * Public License.
 *
 * A copy of this license is available in the file LICENSE in the
 * top-level directory of the distribution or, alternatively, at
 * <http://www.OpenLDAP.org/license.html>.
 */
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/* ACKNOWLEDGEMENTS:
 * This work was initially developed by Michał Szulczyński for inclusion in
 * OpenLDAP Software.  Additional significant contributors include:
 *   Howard Chu
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 *   Raphael Ouazana
 *   Norbert Pueschel
 *   Christian Manal
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 */
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#include "portable.h"

#include <stdio.h>

#include <ac/string.h>

#include "slap.h"
#include "config.h"
#include "lutil.h"

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#ifndef SLAPD_MEMBEROF_ATTR
#define	SLAPD_MEMBEROF_ATTR	"memberOf"
#endif

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/* Filter represents the memberURL of a group. */
typedef struct autogroup_filter_t {
	struct berval			agf_dn;	/* The base DN in memberURL */
	struct berval			agf_ndn;
	struct berval			agf_filterstr;
	Filter				*agf_filter;
	int				agf_scope;
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	AttributeName			*agf_anlist;
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	struct autogroup_filter_t	*agf_next;
} autogroup_filter_t;

/* Description of group attributes. */
typedef struct autogroup_def_t {
	ObjectClass		*agd_oc;
	AttributeDescription	*agd_member_url_ad;
	AttributeDescription	*agd_member_ad;
	struct autogroup_def_t	*agd_next;
} autogroup_def_t;

/* Represents the group entry. */
typedef struct autogroup_entry_t {
	BerValue		age_dn;
	BerValue		age_ndn;
	autogroup_filter_t	*age_filter; /* List of filters made from memberURLs */
	autogroup_def_t		*age_def; /* Attribute definition */
	ldap_pvt_thread_mutex_t age_mutex;
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	int			age_mustrefresh; /* Defined in request to refresh in response */
	int			age_modrdn_olddnmodified; /* Defined in request to refresh in response */
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	struct autogroup_entry_t	*age_next;
} autogroup_entry_t;

/* Holds pointers to attribute definitions and groups. */
typedef struct autogroup_info_t {
	autogroup_def_t		*agi_def;	/* Group attributes definitions. */
	autogroup_entry_t	*agi_entry;	/* Group entries.  */
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	AttributeDescription	*agi_memberof_ad;	/* memberOf attribute description  */
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	ldap_pvt_thread_mutex_t agi_mutex;
} autogroup_info_t;

/* Search callback for adding groups initially. */
typedef struct autogroup_sc_t {
	autogroup_info_t		*ags_info;	/* Group definitions and entries.  */
	autogroup_def_t		*ags_def;	/* Attributes definition of the group being added. */
} autogroup_sc_t;

/* Used for adding members, found when searching, to a group. */
typedef struct autogroup_ga_t {
	autogroup_entry_t	*agg_group;	/* The group to which the members will be added. */
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	autogroup_filter_t	*agg_filter;	/* Current filter */
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	Entry			*agg_entry;	/* Used in autogroup_member_search_cb to modify 
						this entry with the search results. */

	Modifications		*agg_mod;	/* Used in autogroup_member_search_modify_cb to hold the 
						search results which will be added to the group. */

	Modifications		*agg_mod_last; /* Used in autogroup_member_search_modify_cb so we don't 
						have to search for the last mod added. */
} autogroup_ga_t;


/* 
**	dn, ndn	- the DN of the member to add
**	age	- the group to which the member DN will be added
*/
static int
autogroup_add_member_to_group( Operation *op, BerValue *dn, BerValue *ndn, autogroup_entry_t *age )
{
	slap_overinst	*on = (slap_overinst *)op->o_bd->bd_info;
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	Modifications	*modlist = (Modifications *)ch_calloc( 1, sizeof( Modifications ) );
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	SlapReply	sreply = {REP_RESULT};
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	BerValue	*vals, *nvals;
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	slap_callback	cb = { NULL, slap_null_cb, NULL, NULL };
	Operation	o = *op;

	Debug(LDAP_DEBUG_TRACE, "==> autogroup_add_member_to_group adding <%s> to <%s>\n",
		dn->bv_val, age->age_dn.bv_val, 0);

	assert( dn != NULL );
	assert( ndn != NULL );

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	vals = (BerValue *)ch_calloc( 2, sizeof( BerValue ) );
	nvals = (BerValue *)ch_calloc( 2, sizeof( BerValue ) );
	ber_dupbv( vals, dn );
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	BER_BVZERO( &vals[ 1 ] );
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	ber_dupbv( nvals, ndn );
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	BER_BVZERO( &nvals[ 1 ] );

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	modlist->sml_op = LDAP_MOD_ADD;
	modlist->sml_desc = age->age_def->agd_member_ad;
	modlist->sml_type = age->age_def->agd_member_ad->ad_cname;
	modlist->sml_values = vals;
	modlist->sml_nvalues = nvals;
	modlist->sml_numvals = 1;
	modlist->sml_flags = SLAP_MOD_INTERNAL;
	modlist->sml_next = NULL;

	o.o_tag = LDAP_REQ_MODIFY;
	o.o_callback = &cb;
	o.orm_modlist = modlist;
	o.o_req_dn = age->age_dn;
	o.o_req_ndn = age->age_ndn;
	o.o_permissive_modify = 1;
	o.o_managedsait = SLAP_CONTROL_CRITICAL;
	o.o_relax = SLAP_CONTROL_CRITICAL;

	o.o_bd->bd_info = (BackendInfo *)on->on_info;
	(void)op->o_bd->be_modify( &o, &sreply );
	o.o_bd->bd_info = (BackendInfo *)on;

	slap_mods_free( modlist, 1 );

	return sreply.sr_err;
}

/* 
**	e	- the entry where to get the attribute values
**	age	- the group to which the values will be added
*/
static int
autogroup_add_member_values_to_group( Operation *op, Entry *e, autogroup_entry_t *age, AttributeDescription *attrdesc )
{
	slap_overinst	*on = (slap_overinst *)op->o_bd->bd_info;
	Modifications	modlist;
	SlapReply	sreply = {REP_RESULT};
	Attribute	*attr;
	slap_callback	cb = { NULL, slap_null_cb, NULL, NULL };
	Operation	o = *op;

	Debug(LDAP_DEBUG_TRACE, "==> autogroup_add_member_values_to_group adding <%s> to <%s>\n",
		e->e_name.bv_val, age->age_dn.bv_val, 0);

	assert( e != NULL );

	attr = attrs_find( e->e_attrs, attrdesc );
	if (!attr) {
		// Nothing to add
		return LDAP_SUCCESS;
	}

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	modlist.sml_op = LDAP_MOD_ADD;
	modlist.sml_desc = age->age_def->agd_member_ad;
	modlist.sml_type = age->age_def->agd_member_ad->ad_cname;
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	modlist.sml_values = attr->a_vals;
	modlist.sml_nvalues = attr->a_nvals;
	modlist.sml_numvals = attr->a_numvals;
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	modlist.sml_flags = SLAP_MOD_INTERNAL;
	modlist.sml_next = NULL;

	o.o_tag = LDAP_REQ_MODIFY;
	o.o_callback = &cb;
	o.orm_modlist = &modlist;
	o.o_req_dn = age->age_dn;
	o.o_req_ndn = age->age_ndn;
	o.o_permissive_modify = 1;
	o.o_managedsait = SLAP_CONTROL_CRITICAL;
	o.o_relax = SLAP_CONTROL_CRITICAL;

	o.o_bd->bd_info = (BackendInfo *)on->on_info;
	(void)op->o_bd->be_modify( &o, &sreply );
	o.o_bd->bd_info = (BackendInfo *)on;

	return sreply.sr_err;
}

/*
** dn,ndn	- the DN to be deleted
** age		- the group from which the DN will be deleted
** If we pass a NULL dn and ndn, all members are deleted from the group. 
*/
static int
autogroup_delete_member_from_group( Operation *op, BerValue *dn, BerValue *ndn, autogroup_entry_t *age )
{
	slap_overinst	*on = (slap_overinst *)op->o_bd->bd_info;
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	Modifications	*modlist = (Modifications *)ch_calloc( 1, sizeof( Modifications ) );
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	SlapReply	sreply = {REP_RESULT};
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	BerValue	*vals, *nvals;
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	slap_callback	cb = { NULL, slap_null_cb, NULL, NULL };
	Operation	o = *op;

	if ( dn == NULL || ndn == NULL ) {
		Debug(LDAP_DEBUG_TRACE, "==> autogroup_delete_member_from_group removing all members from <%s>\n",
			age->age_dn.bv_val, 0 ,0);

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		modlist->sml_values = NULL;
		modlist->sml_nvalues = NULL;
		modlist->sml_numvals = 0;
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	} else {
		Debug(LDAP_DEBUG_TRACE, "==> autogroup_delete_member_from_group removing <%s> from <%s>\n",
			dn->bv_val, age->age_dn.bv_val, 0);

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		vals = (BerValue *)ch_calloc( 2, sizeof( BerValue ) );
		nvals = (BerValue *)ch_calloc( 2, sizeof( BerValue ) );
		ber_dupbv( vals, dn );
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		BER_BVZERO( &vals[ 1 ] );
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		ber_dupbv( nvals, ndn );
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		BER_BVZERO( &nvals[ 1 ] );

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		modlist->sml_values = vals;
		modlist->sml_nvalues = nvals;
		modlist->sml_numvals = 1;
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	}


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	modlist->sml_op = LDAP_MOD_DELETE;
	modlist->sml_desc = age->age_def->agd_member_ad;
	modlist->sml_type = age->age_def->agd_member_ad->ad_cname;
	modlist->sml_flags = SLAP_MOD_INTERNAL;
	modlist->sml_next = NULL;
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	o.o_callback = &cb;
	o.o_tag = LDAP_REQ_MODIFY;
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	o.orm_modlist = modlist;
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	o.o_req_dn = age->age_dn;
	o.o_req_ndn = age->age_ndn;
	o.o_relax = SLAP_CONTROL_CRITICAL;
	o.o_managedsait = SLAP_CONTROL_CRITICAL;
	o.o_permissive_modify = 1;

	o.o_bd->bd_info = (BackendInfo *)on->on_info;
	(void)op->o_bd->be_modify( &o, &sreply );
	o.o_bd->bd_info = (BackendInfo *)on;

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	slap_mods_free( modlist, 1 );

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	return sreply.sr_err;
}

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/*
**      e       - the entry where to get the attribute values
**      age     - the group from which the values will be deleted
*/
static int
autogroup_delete_member_values_from_group( Operation *op, Entry *e, autogroup_entry_t *age, AttributeDescription *attrdesc )
{
        slap_overinst   *on = (slap_overinst *)op->o_bd->bd_info;
        Modifications   modlist;
        SlapReply       sreply = {REP_RESULT};
        Attribute       *attr;
        slap_callback   cb = { NULL, slap_null_cb, NULL, NULL };
        Operation       o = *op;

        Debug(LDAP_DEBUG_TRACE, "==> autogroup_delete_member_values_from_group removing <%s> from <%s>\n",
                e->e_name.bv_val, age->age_dn.bv_val, 0);

        assert( e != NULL );

        attr = attrs_find( e->e_attrs, attrdesc );
        if (!attr) {
                // Nothing to add
                return LDAP_SUCCESS;
        }

        modlist.sml_op = LDAP_MOD_DELETE;
        modlist.sml_desc = age->age_def->agd_member_ad;
        modlist.sml_type = age->age_def->agd_member_ad->ad_cname;
        modlist.sml_values = attr->a_vals;
        modlist.sml_nvalues = attr->a_nvals;
        modlist.sml_numvals = attr->a_numvals;
        modlist.sml_flags = SLAP_MOD_INTERNAL;
        modlist.sml_next = NULL;

        o.o_tag = LDAP_REQ_MODIFY;
        o.o_callback = &cb;
        o.orm_modlist = &modlist;
        o.o_req_dn = age->age_dn;
        o.o_req_ndn = age->age_ndn;
        o.o_permissive_modify = 1;
        o.o_managedsait = SLAP_CONTROL_CRITICAL;
        o.o_relax = SLAP_CONTROL_CRITICAL;

        o.o_bd->bd_info = (BackendInfo *)on->on_info;
        (void)op->o_bd->be_modify( &o, &sreply );
        o.o_bd->bd_info = (BackendInfo *)on;

        return sreply.sr_err;
}

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/* 
** Callback used to add entries to a group, 
** which are going to be written in the database
** (used in bi_op_add)
** The group is passed in autogroup_ga_t->agg_group
*/
static int
autogroup_member_search_cb( Operation *op, SlapReply *rs )
{
	slap_overinst		*on = (slap_overinst *)op->o_bd->bd_info;

	assert( op->o_tag == LDAP_REQ_SEARCH );

	if ( rs->sr_type == REP_SEARCH ) {
		autogroup_ga_t		*agg = (autogroup_ga_t *)op->o_callback->sc_private;
		autogroup_entry_t	*age = agg->agg_group;
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		autogroup_filter_t	*agf = agg->agg_filter;
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		Modification		mod;
		const char		*text = NULL;
		char			textbuf[1024];
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		struct berval		*vals, *nvals;
		int			numvals;
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		Debug(LDAP_DEBUG_TRACE, "==> autogroup_member_search_cb <%s>\n",
			rs->sr_entry ? rs->sr_entry->e_name.bv_val : "UNKNOWN_DN", 0, 0);

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		if ( agf->agf_anlist ) {
			Attribute *attr = attrs_find( rs->sr_entry->e_attrs, agf->agf_anlist[0].an_desc );
			if (attr) {
				vals = attr->a_vals;
				nvals = attr->a_nvals;
				numvals = attr->a_numvals;
			} else {
				// Nothing to add
				return 0;
			}
		} else {
			struct berval		lvals[ 2 ], lnvals[ 2 ];
			lvals[ 0 ] = rs->sr_entry->e_name;
			BER_BVZERO( &lvals[ 1 ] );
			lnvals[ 0 ] = rs->sr_entry->e_nname;
			BER_BVZERO( &lnvals[ 1 ] );
			vals = lvals;
			nvals = lnvals;
			numvals = 1;
		}
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		mod.sm_op = LDAP_MOD_ADD;
		mod.sm_desc = age->age_def->agd_member_ad;
		mod.sm_type = age->age_def->agd_member_ad->ad_cname;
		mod.sm_values = vals;
		mod.sm_nvalues = nvals;
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		mod.sm_numvals = numvals;
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		modify_add_values( agg->agg_entry, &mod, /* permissive */ 1, &text, textbuf, sizeof( textbuf ) );
	}

	return 0;
}

/* 
** Callback used to add entries to a group, which is already in the database.
** (used in on_response)
** The group is passed in autogroup_ga_t->agg_group
** NOTE: Very slow.
*/
static int
autogroup_member_search_modify_cb( Operation *op, SlapReply *rs )
{
	assert( op->o_tag == LDAP_REQ_SEARCH );

	if ( rs->sr_type == REP_SEARCH ) {
		autogroup_ga_t		*agg = (autogroup_ga_t *)op->o_callback->sc_private;
		autogroup_entry_t	*age = agg->agg_group;
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		autogroup_filter_t	*agf = agg->agg_filter;
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		Modifications		*modlist;
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		struct berval		*vals, *nvals;
		int			numvals;
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		Debug(LDAP_DEBUG_TRACE, "==> autogroup_member_search_modify_cb <%s>\n",
			rs->sr_entry ? rs->sr_entry->e_name.bv_val : "UNKNOWN_DN", 0, 0);

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		if ( agf->agf_anlist ) {
			Attribute *attr = attrs_find( rs->sr_entry->e_attrs, agf->agf_anlist[0].an_desc );
			if (attr) {
				vals = attr->a_vals;
				nvals = attr->a_nvals;
				numvals = attr->a_numvals;
			} else {
				// Nothing to add
				return 0;
			}
		} else {
			struct berval		lvals[ 2 ], lnvals[ 2 ];
			lvals[ 0 ] = rs->sr_entry->e_name;
			BER_BVZERO( &lvals[ 1 ] );
			lnvals[ 0 ] = rs->sr_entry->e_nname;
			BER_BVZERO( &lnvals[ 1 ] );
			vals = lvals;
			nvals = lnvals;
			numvals = 1;
		}
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		if ( numvals ) {
			modlist = (Modifications *)ch_calloc( 1, sizeof( Modifications ) );
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			modlist->sml_op = LDAP_MOD_ADD;
			modlist->sml_desc = age->age_def->agd_member_ad;
			modlist->sml_type = age->age_def->agd_member_ad->ad_cname;
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			ber_bvarray_dup_x( &modlist->sml_values, vals, NULL );
			ber_bvarray_dup_x( &modlist->sml_nvalues, nvals, NULL );
			modlist->sml_numvals = numvals;
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			modlist->sml_flags = SLAP_MOD_INTERNAL;
			modlist->sml_next = NULL;
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			if ( agg->agg_mod == NULL ) {
				agg->agg_mod = modlist;
				agg->agg_mod_last = modlist;
			} else {
				agg->agg_mod_last->sml_next = modlist;
				agg->agg_mod_last = modlist;
			}
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		}

	}

	return 0;
}


/*
** Adds all entries matching the passed filter to the specified group.
** If modify == 1, then we modify the group's entry in the database using be_modify.
** If modify == 0, then, we must supply a rw entry for the group, 
**	because we only modify the entry, without calling be_modify.
** e	- the group entry, to which the members will be added
** age	- the group
** agf	- the filter
*/
static int
autogroup_add_members_from_filter( Operation *op, Entry *e, autogroup_entry_t *age, autogroup_filter_t *agf, int modify)
{
	slap_overinst		*on = (slap_overinst *)op->o_bd->bd_info;
	Operation		o = *op;
	SlapReply		rs = { REP_SEARCH };
	slap_callback		cb = { 0 };
	slap_callback		null_cb = { NULL, slap_null_cb, NULL, NULL };
	autogroup_ga_t		agg;

	Debug(LDAP_DEBUG_TRACE, "==> autogroup_add_members_from_filter <%s>\n",
		age->age_dn.bv_val, 0, 0);

	o.ors_attrsonly = 0;
	o.o_tag = LDAP_REQ_SEARCH;

	o.o_req_dn = agf->agf_dn;
	o.o_req_ndn = agf->agf_ndn;

	o.ors_filterstr = agf->agf_filterstr;
	o.ors_filter = agf->agf_filter;

	o.ors_scope = agf->agf_scope;
	o.ors_deref = LDAP_DEREF_NEVER;
	o.ors_limit = NULL;
	o.ors_tlimit = SLAP_NO_LIMIT;
	o.ors_slimit = SLAP_NO_LIMIT;
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	o.ors_attrs =  agf->agf_anlist ? agf->agf_anlist : slap_anlist_no_attrs;
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	agg.agg_group = age;
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	agg.agg_filter = agf;
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	agg.agg_mod = NULL;
	agg.agg_mod_last = NULL;
	agg.agg_entry = e;
	cb.sc_private = &agg;

	if ( modify == 1 ) {
		cb.sc_response = autogroup_member_search_modify_cb;
	} else {
		cb.sc_response = autogroup_member_search_cb;
	}

	cb.sc_cleanup = NULL;
	cb.sc_next = NULL;

	o.o_callback = &cb;

	o.o_bd->bd_info = (BackendInfo *)on->on_info;
	op->o_bd->be_search( &o, &rs );
	o.o_bd->bd_info = (BackendInfo *)on;	

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	if ( modify == 1 && agg.agg_mod ) {
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		rs_reinit( &rs, REP_RESULT );

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		o = *op;
		o.o_callback = &null_cb;
		o.o_tag = LDAP_REQ_MODIFY;
		o.orm_modlist = agg.agg_mod;
		o.o_req_dn = age->age_dn;
		o.o_req_ndn = age->age_ndn;
		o.o_relax = SLAP_CONTROL_CRITICAL;
		o.o_managedsait = SLAP_CONTROL_NONCRITICAL;
		o.o_permissive_modify = 1;

		o.o_bd->bd_info = (BackendInfo *)on->on_info;
		(void)op->o_bd->be_modify( &o, &rs );
		o.o_bd->bd_info = (BackendInfo *)on;	

		slap_mods_free(agg.agg_mod, 1);
	}

	return 0;
}

/* 
** Adds a group to the internal list from the passed entry.
** scan specifies whether to add all maching members to the group.
** modify specifies whether to modify the given group entry (when modify == 0),
**	or to modify the group entry in the database (when modify == 1 and e = NULL and ndn != NULL).
** agi	- pointer to the groups and the attribute definitions
** agd - the attribute definition of the added group
** e	- the entry representing the group, can be NULL if the ndn is specified, and modify == 1
** ndn	- the DN of the group, can be NULL if we give a non-NULL e
*/
static int
autogroup_add_group( Operation *op, autogroup_info_t *agi, autogroup_def_t *agd, Entry *e, BerValue *ndn, int scan, int modify)
{
	autogroup_entry_t	**agep = &agi->agi_entry;
	autogroup_filter_t	*agf, *agf_prev = NULL;
	slap_overinst		*on = (slap_overinst *)op->o_bd->bd_info;
	LDAPURLDesc		*lud = NULL;
	Attribute		*a;
	BerValue		*bv, dn;
	int			rc = 0, match = 1, null_entry = 0;

	if ( e == NULL ) {
		if ( overlay_entry_get_ov( op, ndn, NULL, NULL, 0, &e, on ) !=
			LDAP_SUCCESS || e == NULL ) {
			Debug( LDAP_DEBUG_TRACE, "autogroup_add_group: cannot get entry for <%s>\n", ndn->bv_val, 0, 0);
			return 1;
		}

		null_entry = 1;
	}

	Debug(LDAP_DEBUG_TRACE, "==> autogroup_add_group <%s>\n",
		e->e_name.bv_val, 0, 0);

	if ( agi->agi_entry != NULL ) {
		for ( ; *agep ; agep = &(*agep)->age_next ) {
			dnMatch( &match, 0, NULL, NULL, &e->e_nname, &(*agep)->age_ndn );
			if ( match == 0 ) {
				Debug( LDAP_DEBUG_TRACE, "autogroup_add_group: group already exists: <%s>\n", e->e_name.bv_val,0,0);
				return 1;
			}
			/* goto last */;
		}
	}


	*agep = (autogroup_entry_t *)ch_calloc( 1, sizeof( autogroup_entry_t ) );
	ldap_pvt_thread_mutex_init( &(*agep)->age_mutex );
	(*agep)->age_def = agd;
	(*agep)->age_filter = NULL;
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	(*agep)->age_mustrefresh = 0;
	(*agep)->age_modrdn_olddnmodified = 0;
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	ber_dupbv( &(*agep)->age_dn, &e->e_name );
	ber_dupbv( &(*agep)->age_ndn, &e->e_nname );

	a = attrs_find( e->e_attrs, agd->agd_member_url_ad );

	if ( null_entry == 1 ) {
		a = attrs_dup( a );
		overlay_entry_release_ov( op, e, 0, on );
	}

	if( a == NULL ) {
		Debug( LDAP_DEBUG_TRACE, "autogroup_add_group: group has no memberURL\n", 0,0,0);
	} else {
		for ( bv = a->a_nvals; !BER_BVISNULL( bv ); bv++ ) {

			agf = (autogroup_filter_t*)ch_calloc( 1, sizeof( autogroup_filter_t ) );

			if ( ldap_url_parse( bv->bv_val, &lud ) != LDAP_URL_SUCCESS ) {
				Debug( LDAP_DEBUG_TRACE, "autogroup_add_group: cannot parse url <%s>\n", bv->bv_val,0,0);
				/* FIXME: error? */
				ch_free( agf ); 
				continue;
			}

			agf->agf_scope = lud->lud_scope;

			if ( lud->lud_dn == NULL ) {
				BER_BVSTR( &dn, "" );
			} else {
				ber_str2bv( lud->lud_dn, 0, 0, &dn );
			}

			rc = dnPrettyNormal( NULL, &dn, &agf->agf_dn, &agf->agf_ndn, NULL );
			if ( rc != LDAP_SUCCESS ) {
				Debug( LDAP_DEBUG_TRACE, "autogroup_add_group: cannot normalize DN <%s>\n", dn.bv_val,0,0);
				/* FIXME: error? */
				goto cleanup;
			}

			if ( lud->lud_filter != NULL ) {
				ber_str2bv( lud->lud_filter, 0, 1, &agf->agf_filterstr);
				agf->agf_filter = str2filter( lud->lud_filter );
			}			

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			if ( lud->lud_attrs != NULL ) {
				int i;

				for ( i=0 ; lud->lud_attrs[i]!=NULL ; i++) {
					/* Just counting */;
				}

				if ( i > 1 ) {
					Debug( LDAP_DEBUG_ANY, "autogroup_add_group: to much attributes specified in url <%s>\n",
						bv->bv_val, 0, 0);
					/* FIXME: error? */
					ldap_free_urldesc( lud );
					ch_free( agf ); 
				}
					
				agf->agf_anlist = str2anlist( NULL, lud->lud_attrs[0], "," );

				if ( agf->agf_anlist == NULL ) {
					Debug( LDAP_DEBUG_ANY, "autogroup_add_group: unable to find AttributeDescription \"%s\".\n",
						lud->lud_attrs[0], 0, 0 );		
					/* FIXME: error? */
					ldap_free_urldesc( lud );
					ch_free( agf ); 
					continue;
				}
			}

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			agf->agf_next = NULL;


			if( (*agep)->age_filter == NULL ) {
				(*agep)->age_filter = agf;
			}

			if( agf_prev != NULL ) {
				agf_prev->agf_next = agf;
			}

			agf_prev = agf;

			if ( scan == 1 ){
				autogroup_add_members_from_filter( op, e, (*agep), agf, modify );
			}

			Debug( LDAP_DEBUG_TRACE, "autogroup_add_group: added memberURL DN <%s> with filter <%s>\n",
				agf->agf_ndn.bv_val, agf->agf_filterstr.bv_val, 0);

			ldap_free_urldesc( lud );

			continue;


cleanup:;

			ldap_free_urldesc( lud );				
			ch_free( agf ); 
		}
	}

	if ( null_entry == 1 ) {
		attrs_free( a );
	}
	return rc;
}

/* 
** Used when opening the database to add all existing 
** groups from the database to our internal list.
*/
static int
autogroup_group_add_cb( Operation *op, SlapReply *rs )
{
	assert( op->o_tag == LDAP_REQ_SEARCH );

	if ( rs->sr_type == REP_SEARCH ) {
		autogroup_sc_t		*ags = (autogroup_sc_t *)op->o_callback->sc_private;

		Debug(LDAP_DEBUG_TRACE, "==> autogroup_group_add_cb <%s>\n",
			rs->sr_entry ? rs->sr_entry->e_name.bv_val : "UNKNOWN_DN", 0, 0);

		autogroup_add_group( op, ags->ags_info, ags->ags_def, rs->sr_entry, NULL, 0, 0);
	}

	return 0;
}


/*
** When adding a group, we first strip any existing members,
** and add all which match the filters ourselfs.
*/
static int
autogroup_add_entry( Operation *op, SlapReply *rs)
{
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	slap_overinst		*on = (slap_overinst *)op->o_bd->bd_info;
	autogroup_info_t	*agi = (autogroup_info_t *)on->on_bi.bi_private;
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	autogroup_def_t		*agd = agi->agi_def;
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	autogroup_entry_t	*age;
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	autogroup_filter_t	*agf;
	int			rc = 0;

	Debug( LDAP_DEBUG_TRACE, "==> autogroup_add_entry <%s>\n", 
		op->ora_e->e_name.bv_val, 0, 0);

	ldap_pvt_thread_mutex_lock( &agi->agi_mutex );		

	/* Check if it's a group. */
	for ( ; agd ; agd = agd->agd_next ) {
		if ( is_entry_objectclass_or_sub( op->ora_e, agd->agd_oc ) ) {
			Modification		mod;
			const char		*text = NULL;
			char			textbuf[1024];

			mod.sm_op = LDAP_MOD_DELETE;
			mod.sm_desc = agd->agd_member_ad;
			mod.sm_type = agd->agd_member_ad->ad_cname;
			mod.sm_values = NULL;
			mod.sm_nvalues = NULL;

			/* We don't want any member attributes added by the user. */
			modify_delete_values( op->ora_e, &mod, /* permissive */ 1, &text, textbuf, sizeof( textbuf ) );

			autogroup_add_group( op, agi, agd, op->ora_e, NULL, 1 , 0);
			ldap_pvt_thread_mutex_unlock( &agi->agi_mutex );		
			return SLAP_CB_CONTINUE;
		}
	}

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	for ( age = agi->agi_entry; age ; age = age->age_next ) {
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		ldap_pvt_thread_mutex_lock( &age->age_mutex );		

		/* Check if any of the filters are the suffix to the entry DN. 
		   If yes, we can test that filter against the entry. */

		for ( agf = age->age_filter; agf ; agf = agf->agf_next ) {
			if ( dnIsSuffix( &op->o_req_ndn, &agf->agf_ndn ) ) {
				rc = test_filter( op, op->ora_e, agf->agf_filter );
				if ( rc == LDAP_COMPARE_TRUE ) {
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					if ( agf->agf_anlist ) {
						autogroup_add_member_values_to_group( op, op->ora_e, age, agf->agf_anlist[0].an_desc );
					} else {
						autogroup_add_member_to_group( op, &op->ora_e->e_name, &op->ora_e->e_nname, age );
					}
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					break;
				}
			}
		}
		ldap_pvt_thread_mutex_unlock( &age->age_mutex );		
	}

	ldap_pvt_thread_mutex_unlock( &agi->agi_mutex );		

	return SLAP_CB_CONTINUE;
}

/*
** agi	- internal group and attribute definitions list
** e	- the group to remove from the internal list
*/
static int
autogroup_delete_group( autogroup_info_t *agi, autogroup_entry_t *e )
{
	autogroup_entry_t	*age = agi->agi_entry,
				*age_prev = NULL,
				*age_next;
	int			rc = 1;

	Debug( LDAP_DEBUG_TRACE, "==> autogroup_delete_group <%s>\n", 
		age->age_dn.bv_val, 0, 0);

	for ( age_next = age ; age_next ; age_prev = age, age = age_next ) {
		age_next = age->age_next;

		if ( age == e ) {
			autogroup_filter_t	*agf = age->age_filter,
							*agf_next;

			if ( age_prev != NULL ) {
				age_prev->age_next = age_next;
			} else {
				agi->agi_entry = NULL;
			}

			ch_free( age->age_dn.bv_val );
			ch_free( age->age_ndn.bv_val );

			for( agf_next = agf ; agf_next ; agf = agf_next ){
				agf_next = agf->agf_next;

				filter_free( agf->agf_filter );
				ch_free( agf->agf_filterstr.bv_val );
				ch_free( agf->agf_dn.bv_val );
				ch_free( agf->agf_ndn.bv_val );
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				anlist_free( agf->agf_anlist, 1, NULL );
				ch_free( agf );
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			}

			ldap_pvt_thread_mutex_unlock( &age->age_mutex );		
			ldap_pvt_thread_mutex_destroy( &age->age_mutex );
			ch_free( age );

			rc = 0;	
			return rc;

		}
	}

	Debug( LDAP_DEBUG_TRACE, "autogroup_delete_group: group <%s> not found, should not happen\n", age->age_dn.bv_val, 0, 0);

	return rc;

}

static int
autogroup_delete_entry( Operation *op, SlapReply *rs)
{
	slap_overinst		*on = (slap_overinst *)op->o_bd->bd_info;
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	autogroup_info_t	*agi = (autogroup_info_t *)on->on_bi.bi_private;
	autogroup_entry_t	*age, *age_prev, *age_next;
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	autogroup_filter_t	*agf;
	Entry			*e;
	int			matched_group = 0, rc = 0;

	Debug( LDAP_DEBUG_TRACE, "==> autogroup_delete_entry <%s>\n", op->o_req_dn.bv_val, 0, 0);

	ldap_pvt_thread_mutex_lock( &agi->agi_mutex );

	if ( overlay_entry_get_ov( op, &op->o_req_ndn, NULL, NULL, 0, &e, on ) !=
		LDAP_SUCCESS || e == NULL ) {
		Debug( LDAP_DEBUG_TRACE, "autogroup_delete_entry: cannot get entry for <%s>\n", op->o_req_dn.bv_val, 0, 0);
		ldap_pvt_thread_mutex_unlock( &agi->agi_mutex );			
		return SLAP_CB_CONTINUE;
	}

	/* Check if the entry to be deleted is one of our groups. */
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	for ( age_next = agi->agi_entry ; age_next ; age_prev = age ) {
		age = age_next;
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		ldap_pvt_thread_mutex_lock( &age->age_mutex );
		age_next = age->age_next;

		if ( is_entry_objectclass_or_sub( e, age->age_def->agd_oc ) ) {
			int match = 1;

			matched_group = 1;

			dnMatch( &match, 0, NULL, NULL, &e->e_nname, &age->age_ndn );

			if ( match == 0 ) {
				autogroup_delete_group( agi, age );
				break;
			}
		}

		ldap_pvt_thread_mutex_unlock( &age->age_mutex );			
	}

	if ( matched_group == 1 ) {
		overlay_entry_release_ov( op, e, 0, on );
		ldap_pvt_thread_mutex_unlock( &agi->agi_mutex );		
		return SLAP_CB_CONTINUE;
	}

	/* Check if the entry matches any of the groups.
	   If yes, we can delete the entry from that group. */

	for ( age = agi->agi_entry ; age ; age = age->age_next ) {
		ldap_pvt_thread_mutex_lock( &age->age_mutex );		

		for ( agf = age->age_filter; agf ; agf = agf->agf_next ) {
			if ( dnIsSuffix( &op->o_req_ndn, &agf->agf_ndn ) ) {
				rc = test_filter( op, e, agf->agf_filter );
				if ( rc == LDAP_COMPARE_TRUE ) {
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					/* If the attribute is retrieved from the entry, we don't know what to delete
					** So the group must be entirely refreshed
					** But the refresh can't be done now because the entry is not deleted
					** So the group is marked as mustrefresh
					*/
					if ( agf->agf_anlist ) {
						age->age_mustrefresh = 1;
					} else {
						autogroup_delete_member_from_group( op, &e->e_name, &e->e_nname, age );
					}
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					break;
				}
			}
		}
		ldap_pvt_thread_mutex_unlock( &age->age_mutex );
	}

	overlay_entry_release_ov( op, e, 0, on );
	ldap_pvt_thread_mutex_unlock( &agi->agi_mutex );		

	return SLAP_CB_CONTINUE;
}

static int
autogroup_response( Operation *op, SlapReply *rs )
{
	slap_overinst		*on = (slap_overinst *)op->o_bd->bd_info;
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	autogroup_info_t	*agi = (autogroup_info_t *)on->on_bi.bi_private;
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	autogroup_def_t		*agd = agi->agi_def;
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	autogroup_entry_t	*age;
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	autogroup_filter_t	*agf;
	BerValue		new_dn, new_ndn, pdn;
	Entry			*e, *group;
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	Attribute		*a, *ea;
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	int			is_olddn, is_newdn, is_value_refresh, dn_equal;

	/* Handle all cases where a refresh of the group is needed */
	if ( op->o_tag == LDAP_REQ_DELETE || op->o_tag == LDAP_REQ_MODIFY ) {
		if ( rs->sr_type == REP_RESULT && rs->sr_err == LDAP_SUCCESS && !get_manageDSAit( op ) ) {

			ldap_pvt_thread_mutex_lock( &agi->agi_mutex );

			for ( age = agi->agi_entry ; age ; age = age->age_next ) {
				/* Request detected that the group must be refreshed */

				ldap_pvt_thread_mutex_lock( &age->age_mutex );

				if ( age->age_mustrefresh ) {
					autogroup_delete_member_from_group( op, NULL, NULL, age) ;

					for ( agf = age->age_filter ; agf ; agf = agf->agf_next ) {
						autogroup_add_members_from_filter( op, NULL, age, agf, 1 );
					}
				}
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				ldap_pvt_thread_mutex_unlock( &age->age_mutex );
			}

			ldap_pvt_thread_mutex_unlock( &agi->agi_mutex );
		}
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	} else if ( op->o_tag == LDAP_REQ_MODRDN ) {
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		if ( rs->sr_type == REP_RESULT && rs->sr_err == LDAP_SUCCESS && !get_manageDSAit( op )) {

			Debug( LDAP_DEBUG_TRACE, "==> autogroup_response MODRDN from <%s>\n", op->o_req_dn.bv_val, 0, 0);

			ldap_pvt_thread_mutex_lock( &agi->agi_mutex );			

			if ( op->oq_modrdn.rs_newSup ) {
				pdn = *op->oq_modrdn.rs_newSup;
			} else {
				dnParent( &op->o_req_dn, &pdn );
			}
			build_new_dn( &new_dn, &pdn, &op->orr_newrdn, op->o_tmpmemctx );

			if ( op->oq_modrdn.rs_nnewSup ) {
				pdn = *op->oq_modrdn.rs_nnewSup;
			} else {
				dnParent( &op->o_req_ndn, &pdn );
			}
			build_new_dn( &new_ndn, &pdn, &op->orr_nnewrdn, op->o_tmpmemctx );

			Debug( LDAP_DEBUG_TRACE, "autogroup_response MODRDN to <%s>\n", new_dn.bv_val, 0, 0);

			dnMatch( &dn_equal, 0, NULL, NULL, &op->o_req_ndn, &new_ndn );

			if ( overlay_entry_get_ov( op, &new_ndn, NULL, NULL, 0, &e, on ) !=
				LDAP_SUCCESS || e == NULL ) {
				Debug( LDAP_DEBUG_TRACE, "autogroup_response MODRDN cannot get entry for <%s>\n", new_dn.bv_val, 0, 0);
				ldap_pvt_thread_mutex_unlock( &agi->agi_mutex );
				return SLAP_CB_CONTINUE;
			}

			a = attrs_find( e->e_attrs, slap_schema.si_ad_objectClass );


			if ( a == NULL ) {
				Debug( LDAP_DEBUG_TRACE, "autogroup_response MODRDN entry <%s> has no objectClass\n", new_dn.bv_val, 0, 0);
				overlay_entry_release_ov( op, e, 0, on );
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