Adding upstream version 2.4.57+dfsg.upstream/2.4.57+dfsgupstream

Signed-off-by: Daniel Baumann <daniel.baumann@progress-linux.org>

1 files changed, 2234 insertions, 0 deletions

diff --git a/contrib/slapd-modules/autogroup/autogroup.c b/contrib/slapd-modules/autogroup/autogroup.c
new file mode 100644
index 0000000..8caf082
--- /dev/null
+++ b/contrib/slapd-modules/autogroup/autogroup.c
@@ -0,0 +1,2234 @@
+/* autogroup.c - automatic group overlay */
+/* $OpenLDAP$ */
+/* This work is part of OpenLDAP Software <http://www.openldap.org/>.
+ *
+ * Copyright 2007-2021 The OpenLDAP Foundation.
+ * Portions Copyright 2007 Michał Szulczyński.
+ * Portions Copyright 2009 Howard Chu.
+ * 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>.
+ */
+/* ACKNOWLEDGEMENTS:
+ * This work was initially developed by Michał Szulczyński for inclusion in
+ * OpenLDAP Software.  Additional significant contributors include:
+ *   Howard Chu
+ *   Raphael Ouazana
+ *   Norbert Pueschel
+ *   Christian Manal
+ */
+
+#include "portable.h"
+
+#include <stdio.h>
+
+#include <ac/string.h>
+
+#include "slap.h"
+#include "config.h"
+#include "lutil.h"
+
+#ifndef SLAPD_MEMBEROF_ATTR
+#define	SLAPD_MEMBEROF_ATTR	"memberOf"
+#endif
+
+static slap_overinst	autogroup;
+
+/* 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;
+	AttributeName			*agf_anlist;
+	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;
+	int			age_mustrefresh; /* Defined in request to refresh in response */
+	int			age_modrdn_olddnmodified; /* Defined in request to refresh in response */
+	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.  */
+	AttributeDescription	*agi_memberof_ad;	/* memberOf attribute description  */
+	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. */
+	autogroup_filter_t	*agg_filter;	/* Current filter */
+	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;
+	Modifications	*modlist = (Modifications *)ch_calloc( 1, sizeof( Modifications ) );
+	SlapReply	sreply = {REP_RESULT};
+	BerValue	*vals, *nvals;
+	slap_callback	cb = { NULL, slap_null_cb, NULL, NULL };
+	Operation	o = *op;
+	unsigned long opid = op->o_opid;
+	OpExtra oex;
+
+	assert( dn != NULL );
+	assert( ndn != NULL );
+	Debug(LDAP_DEBUG_TRACE, "==> autogroup_add_member_to_group adding <%s> to <%s>\n",
+		dn->bv_val, age->age_dn.bv_val, 0);
+
+	vals = (BerValue *)ch_calloc( 2, sizeof( BerValue ) );
+	nvals = (BerValue *)ch_calloc( 2, sizeof( BerValue ) );
+	ber_dupbv( vals, dn );
+	BER_BVZERO( &vals[ 1 ] );
+	ber_dupbv( nvals, ndn );
+	BER_BVZERO( &nvals[ 1 ] );
+
+	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_opid = 0;	/* shared with op, saved above */
+	o.o_tag = LDAP_REQ_MODIFY;
+	o.o_callback = &cb;
+	o.orm_modlist = modlist;
+	o.o_dn = op->o_bd->be_rootdn;
+	o.o_ndn = op->o_bd->be_rootndn;
+	o.o_req_dn = age->age_dn;
+	o.o_req_ndn = age->age_ndn;
+	o.o_permissive_modify = 1;
+	o.o_dont_replicate = 1;
+	o.orm_no_opattrs = 1;
+	o.o_managedsait = SLAP_CONTROL_CRITICAL;
+	o.o_relax = SLAP_CONTROL_CRITICAL;
+
+	oex.oe_key = (void *)&autogroup;
+	LDAP_SLIST_INSERT_HEAD( &o.o_extra, &oex, oe_next );
+
+	o.o_bd->bd_info = (BackendInfo *)on->on_info;
+	(void)op->o_bd->be_modify( &o, &sreply );
+	o.o_bd->bd_info = (BackendInfo *)on;
+
+	LDAP_SLIST_REMOVE( &o.o_extra, &oex, OpExtra, oe_next );
+
+	slap_mods_free( modlist, 1 );
+	op->o_opid = opid;
+
+	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, struct berval *dn, autogroup_entry_t *age, Attribute *attr )
+{
+	slap_overinst	*on = (slap_overinst *)op->o_bd->bd_info;
+	Modifications	modlist;
+	SlapReply	sreply = {REP_RESULT};
+	slap_callback	cb = { NULL, slap_null_cb, NULL, NULL };
+	Operation	o = *op;
+	unsigned long opid = op->o_opid;
+	OpExtra oex;
+
+	Debug(LDAP_DEBUG_TRACE, "==> autogroup_add_member_values_to_group adding <%s> to <%s>\n",
+		dn->bv_val, age->age_dn.bv_val, 0);
+
+	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 = 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_opid = 0;
+	o.o_tag = LDAP_REQ_MODIFY;
+	o.o_callback = &cb;
+	o.orm_modlist = &modlist;
+	o.o_dn = op->o_bd->be_rootdn;
+	o.o_ndn = op->o_bd->be_rootndn;
+	o.o_req_dn = age->age_dn;
+	o.o_req_ndn = age->age_ndn;
+	o.o_permissive_modify = 1;
+	o.o_dont_replicate = 1;
+	o.orm_no_opattrs = 1;
+	o.o_managedsait = SLAP_CONTROL_CRITICAL;
+	o.o_relax = SLAP_CONTROL_CRITICAL;
+
+	oex.oe_key = (void *)&autogroup;
+	LDAP_SLIST_INSERT_HEAD( &o.o_extra, &oex, oe_next );
+
+	o.o_bd->bd_info = (BackendInfo *)on->on_info;
+	(void)op->o_bd->be_modify( &o, &sreply );
+	o.o_bd->bd_info = (BackendInfo *)on;
+	op->o_opid = opid;
+	LDAP_SLIST_REMOVE( &o.o_extra, &oex, OpExtra, oe_next );
+
+	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;
+	Modifications	*modlist = (Modifications *)ch_calloc( 1, sizeof( Modifications ) );
+	SlapReply	sreply = {REP_RESULT};
+	BerValue	*vals, *nvals;
+	slap_callback	cb = { NULL, slap_null_cb, NULL, NULL };
+	Operation	o = *op;
+	unsigned long opid = op->o_opid;
+	OpExtra oex;
+
+	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);
+
+		modlist->sml_values = NULL;
+		modlist->sml_nvalues = NULL;
+		modlist->sml_numvals = 0;
+	} else {
+		Debug(LDAP_DEBUG_TRACE, "==> autogroup_delete_member_from_group removing <%s> from <%s>\n",
+			dn->bv_val, age->age_dn.bv_val, 0);
+
+		vals = (BerValue *)ch_calloc( 2, sizeof( BerValue ) );
+		nvals = (BerValue *)ch_calloc( 2, sizeof( BerValue ) );
+		ber_dupbv( vals, dn );
+		BER_BVZERO( &vals[ 1 ] );
+		ber_dupbv( nvals, ndn );
+		BER_BVZERO( &nvals[ 1 ] );
+
+		modlist->sml_values = vals;
+		modlist->sml_nvalues = nvals;
+		modlist->sml_numvals = 1;
+	}
+
+
+	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;
+
+	o.o_opid = 0;
+	o.o_callback = &cb;
+	o.o_tag = LDAP_REQ_MODIFY;
+	o.orm_modlist = modlist;
+	o.o_dn = op->o_bd->be_rootdn;
+	o.o_ndn = op->o_bd->be_rootndn;
+	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_dont_replicate = 1;
+	o.orm_no_opattrs = 1;
+
+	oex.oe_key = (void *)&autogroup;
+	LDAP_SLIST_INSERT_HEAD( &o.o_extra, &oex, oe_next );
+
+	o.o_bd->bd_info = (BackendInfo *)on->on_info;
+	(void)op->o_bd->be_modify( &o, &sreply );
+	o.o_bd->bd_info = (BackendInfo *)on;
+
+	LDAP_SLIST_REMOVE( &o.o_extra, &oex, OpExtra, oe_next );
+
+	slap_mods_free( modlist, 1 );
+
+	op->o_opid = opid;
+	return sreply.sr_err;
+}
+
+/*
+**      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, struct berval *dn, autogroup_entry_t *age, Attribute *attr )
+{
+        slap_overinst   *on = (slap_overinst *)op->o_bd->bd_info;
+        Modifications   modlist;
+        SlapReply       sreply = {REP_RESULT};
+        slap_callback   cb = { NULL, slap_null_cb, NULL, NULL };
+        Operation       o = *op;
+	unsigned long opid = op->o_opid;
+	OpExtra oex;
+
+        Debug(LDAP_DEBUG_TRACE, "==> autogroup_delete_member_values_from_group removing <%s> from <%s>\n",
+			dn->bv_val, age->age_dn.bv_val, 0);
+
+        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_opid = 0;
+        o.o_tag = LDAP_REQ_MODIFY;
+        o.o_callback = &cb;
+        o.orm_modlist = &modlist;
+		o.o_dn = op->o_bd->be_rootdn;
+		o.o_ndn = op->o_bd->be_rootndn;
+        o.o_req_dn = age->age_dn;
+        o.o_req_ndn = age->age_ndn;
+        o.o_permissive_modify = 1;
+	o.o_dont_replicate = 1;
+	o.orm_no_opattrs = 1;
+        o.o_managedsait = SLAP_CONTROL_CRITICAL;
+        o.o_relax = SLAP_CONTROL_CRITICAL;
+
+	oex.oe_key = (void *)&autogroup;
+	LDAP_SLIST_INSERT_HEAD( &o.o_extra, &oex, oe_next );
+
+        o.o_bd->bd_info = (BackendInfo *)on->on_info;
+        (void)op->o_bd->be_modify( &o, &sreply );
+        o.o_bd->bd_info = (BackendInfo *)on;
+	op->o_opid = opid;
+
+	LDAP_SLIST_REMOVE( &o.o_extra, &oex, OpExtra, oe_next );
+
+        return sreply.sr_err;
+}
+
+/* 
+** 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 )
+{
+	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;
+		autogroup_filter_t	*agf = agg->agg_filter;
+		Modification		mod;
+		const char		*text = NULL;
+		char			textbuf[1024];
+		struct berval		*vals, *nvals;
+		struct berval		lvals[ 2 ], lnvals[ 2 ];
+		int			numvals;
+
+		Debug(LDAP_DEBUG_TRACE, "==> autogroup_member_search_cb <%s>\n",
+			rs->sr_entry ? rs->sr_entry->e_name.bv_val : "UNKNOWN_DN", 0, 0);
+
+		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 {
+			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;
+		}
+
+		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;
+		mod.sm_numvals = numvals;
+
+		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;
+		autogroup_filter_t	*agf = agg->agg_filter;
+		Modifications		*modlist;
+		struct berval		*vals, *nvals;
+		struct berval		lvals[ 2 ], lnvals[ 2 ];
+		int			numvals;
+
+		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);
+
+		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 {
+			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;
+		}
+
+		if ( numvals ) {
+			modlist = (Modifications *)ch_calloc( 1, sizeof( Modifications ) );
+
+			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;
+
+			ber_bvarray_dup_x( &modlist->sml_values, vals, NULL );
+			ber_bvarray_dup_x( &modlist->sml_nvalues, nvals, NULL );
+			modlist->sml_numvals = numvals;
+
+			modlist->sml_flags = SLAP_MOD_INTERNAL;
+			modlist->sml_next = NULL;
+
+			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;
+			}
+		}
+
+	}
+
+	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;
+	OpExtra oex;
+
+	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_dn = op->o_bd->be_rootdn;
+	o.o_ndn = op->o_bd->be_rootndn;
+	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;
+	o.ors_attrs =  agf->agf_anlist ? agf->agf_anlist : slap_anlist_no_attrs;
+	o.o_do_not_cache = 1;
+
+	agg.agg_group = age;
+	agg.agg_filter = agf;
+	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;	
+
+	if ( modify == 1 && agg.agg_mod ) {
+		unsigned long opid = op->o_opid;
+
+		rs_reinit( &rs, REP_RESULT );
+
+		o = *op;
+		o.o_opid = 0;
+		o.o_callback = &null_cb;
+		o.o_tag = LDAP_REQ_MODIFY;
+		o.orm_modlist = agg.agg_mod;
+		o.o_dn = op->o_bd->be_rootdn;
+		o.o_ndn = op->o_bd->be_rootndn;
+		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_dont_replicate = 1;
+		o.orm_no_opattrs = 1;
+
+	oex.oe_key = (void *)&autogroup;
+	LDAP_SLIST_INSERT_HEAD( &o.o_extra, &oex, oe_next );
+
+		o.o_bd->bd_info = (BackendInfo *)on->on_info;
+		(void)op->o_bd->be_modify( &o, &rs );
+		o.o_bd->bd_info = (BackendInfo *)on;	
+
+	LDAP_SLIST_REMOVE( &o.o_extra, &oex, OpExtra, oe_next );
+
+		slap_mods_free(agg.agg_mod, 1);
+		op->o_opid = opid;
+	}
+
+	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;
+	(*agep)->age_mustrefresh = 0;
+	(*agep)->age_modrdn_olddnmodified = 0;
+
+	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 );
+			} else {
+				Debug( LDAP_DEBUG_TRACE, "autogroup_add_group: URL filter is missing <%s>\n", bv->bv_val,0,0);
+				/* FIXME: error? */
+				goto cleanup;
+			}
+
+			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: too many attributes specified in url <%s>\n",
+						bv->bv_val, 0, 0);
+					/* FIXME: error? */
+					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 );
+					ldap_free_urldesc( lud );
+					ch_free( agf );
+					continue;
+				}
+
+				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? */
+					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 );
+					ldap_free_urldesc( lud );
+					ch_free( agf );
+					continue;
+				}
+			}
+
+			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:;
+
+			ch_free( agf->agf_ndn.bv_val );
+			ch_free( agf->agf_dn.bv_val );
+			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;
+}
+
+typedef struct ag_addinfo {
+	slap_overinst *on;
+	Entry *e;
+	autogroup_def_t		*agd;
+} ag_addinfo;
+
+static int
+autogroup_add_entry_cb( Operation *op, SlapReply *rs )
+{
+	slap_callback *sc = op->o_callback;
+	ag_addinfo *aa = sc->sc_private;
+	slap_overinst *on = aa->on;
+	autogroup_info_t	*agi = (autogroup_info_t *)on->on_bi.bi_private;
+	BackendInfo *bi = op->o_bd->bd_info;
+
+	if ( rs->sr_err != LDAP_SUCCESS )
+		goto done;
+
+	op->o_bd->bd_info = (BackendInfo *)on;
+	ldap_pvt_thread_mutex_lock( &agi->agi_mutex );
+	if ( aa->agd ) {
+		autogroup_add_group( op, agi, aa->agd, aa->e, NULL, 1 , 0);
+	} else {
+		autogroup_entry_t	*age;
+		autogroup_filter_t	*agf;
+		struct berval odn, ondn;
+		int rc;
+
+		/* must use rootdn when calling test_filter */
+		odn = op->o_dn;
+		ondn = op->o_ndn;
+		op->o_dn = op->o_bd->be_rootdn;
+		op->o_ndn = op->o_bd->be_rootndn;
+
+		for ( age = agi->agi_entry; age ; age = age->age_next ) {
+			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, aa->e, agf->agf_filter );
+					if ( rc == LDAP_COMPARE_TRUE ) {
+						if ( agf->agf_anlist ) {
+							Attribute *a = attr_find( aa->e->e_attrs, agf->agf_anlist[0].an_desc );
+							if ( a )
+								autogroup_add_member_values_to_group( op, &op->o_req_dn, age, a );
+						} else {
+							autogroup_add_member_to_group( op, &aa->e->e_name, &aa->e->e_nname, age );
+						}
+						break;
+					}
+				}
+			}
+			ldap_pvt_thread_mutex_unlock( &age->age_mutex );
+		}
+		op->o_dn = odn;
+		op->o_ndn = ondn;
+	}
+	ldap_pvt_thread_mutex_unlock( &agi->agi_mutex );
+
+	op->o_bd->bd_info = bi;
+
+done:
+	op->o_callback = sc->sc_next;
+	op->o_tmpfree( sc, op->o_tmpmemctx );
+
+	return SLAP_CB_CONTINUE;
+}
+
+/*
+** 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)
+{
+	slap_overinst		*on = (slap_overinst *)op->o_bd->bd_info;
+	autogroup_info_t	*agi = (autogroup_info_t *)on->on_bi.bi_private;
+	autogroup_def_t		*agd = agi->agi_def;
+	slap_callback	*sc = NULL;
+	ag_addinfo	*aa = NULL;
+
+	Debug( LDAP_DEBUG_TRACE, "==> autogroup_add_entry <%s>\n", 
+		op->ora_e->e_name.bv_val, 0, 0);
+
+	sc = op->o_tmpcalloc( sizeof(slap_callback) + sizeof(ag_addinfo), 1, op->o_tmpmemctx );
+	sc->sc_private = (sc+1);
+	sc->sc_response = autogroup_add_entry_cb;
+	aa = sc->sc_private;
+	aa->on = on;
+	aa->e = op->ora_e;
+	sc->sc_next = op->o_callback;
+	op->o_callback = sc;
+
+	/* 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 ) );
+
+			aa->agd = agd;
+
+			break;
+		}
+	}
+
+	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 );
+				anlist_free( agf->agf_anlist, 1, NULL );
+				ch_free( agf );
+			}
+
+			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;
+	autogroup_info_t	*agi = (autogroup_info_t *)on->on_bi.bi_private;
+	autogroup_entry_t	*age, *age_prev, *age_next;
+	autogroup_filter_t	*agf;
+	Entry			*e;
+	int			matched_group = 0, rc = 0;
+	struct berval odn, ondn;
+	OpExtra *oex;
+
+	LDAP_SLIST_FOREACH( oex, &op->o_extra, oe_next ) {
+		if ( oex->oe_key == (void *)&autogroup )
+			return SLAP_CB_CONTINUE;
+	}
+
+	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. */
+	for ( age_next = agi->agi_entry ; age_next ; age_prev = age ) {
+		age = age_next;
+		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. */
+
+	odn = op->o_dn;
+	ondn = op->o_ndn;
+	op->o_dn = op->o_bd->be_rootdn;
+	op->o_ndn = op->o_bd->be_rootndn;
+
+	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 ) {
+					/* 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 );
+					}
+					break;
+				}
+			}
+		}
+		ldap_pvt_thread_mutex_unlock( &age->age_mutex );
+	}
+	op->o_dn = odn;
+	op->o_ndn = ondn;
+
+	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;
+	autogroup_info_t	*agi = (autogroup_info_t *)on->on_bi.bi_private;
+	autogroup_def_t		*agd = agi->agi_def;
+	autogroup_entry_t	*age;
+	autogroup_filter_t	*agf;
+	BerValue		new_dn, new_ndn, pdn;
+	Entry			*e, *group;
+	Attribute		*a, *ea, *attrs;
+	int			is_olddn, is_newdn, is_value_refresh, dn_equal;
+	OpExtra *oex;
+
+	LDAP_SLIST_FOREACH( oex, &op->o_extra, oe_next ) {
+		if ( oex->oe_key == (void *)&autogroup )
+			break;
+	}
+
+	/* 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 && !oex ) {
+
+			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 );
+					}
+				}
+
+				ldap_pvt_thread_mutex_unlock( &age->age_mutex );
+			}
+
+			ldap_pvt_thread_mutex_unlock( &agi->agi_mutex );
+		}
+	} else if ( op->o_tag == LDAP_REQ_MODRDN ) {
+		if ( rs->sr_type == REP_RESULT && rs->sr_err == LDAP_SUCCESS && !oex ) {
+
+			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 );
+				ldap_pvt_thread_mutex_unlock( &agi->agi_mutex );		
+				return SLAP_CB_CONTINUE;
+			}
+
+
+			/* If a groups DN is modified, just update age_dn/ndn of that group with the new DN. */
+			for ( ; agd; agd = agd->agd_next ) {
+
+				if ( value_find_ex( slap_schema.si_ad_objectClass,
+						SLAP_MR_ATTRIBUTE_VALUE_NORMALIZED_MATCH |
+						SLAP_MR_ASSERTED_VALUE_NORMALIZED_MATCH,
+						a->a_nvals, &agd->agd_oc->soc_cname,
+						op->o_tmpmemctx ) == 0 )
+				{		
+					for ( age = agi->agi_entry ; age ; age = age->age_next ) {
+						int match = 1;
+
+						dnMatch( &match, 0, NULL, NULL, &age->age_ndn, &op->o_req_ndn );
+						if ( match == 0 ) {
+							Debug( LDAP_DEBUG_TRACE, "autogroup_response MODRDN updating group's DN to <%s>\n", new_dn.bv_val, 0, 0);
+							ber_dupbv( &age->age_dn, &new_dn );
+							ber_dupbv( &age->age_ndn, &new_ndn );
+
+							op->o_tmpfree( new_dn.bv_val, op->o_tmpmemctx  );
+							op->o_tmpfree( new_ndn.bv_val, op->o_tmpmemctx );
+							overlay_entry_release_ov( op, e, 0, on );
+							ldap_pvt_thread_mutex_unlock( &agi->agi_mutex );		
+							return SLAP_CB_CONTINUE;
+						}
+					}
+
+				}
+			}
+
+			/* For each group: 
+			   1. check if the orginal entry's DN is in the group.
+			   2. chceck if the any of the group filter's base DN is a suffix of the new DN 
+
+			   If 1 and 2 are both false, we do nothing.
+			   If 1 and 2 is true, we remove the old DN from the group, and add the new DN.
+			   If 1 is false, and 2 is true, we check the entry against the group's filters,
+				and add it's DN to the group.
+			   If 1 is true, and 2 is false, we delete the entry's DN from the group.
+			*/
+			attrs = attrs_dup( e->e_attrs );
+			overlay_entry_release_ov( op, e, 0, on );
+			for ( age = agi->agi_entry ; age ; age = age->age_next ) {
+				is_olddn = 0;
+				is_newdn = 0;
+				is_value_refresh = 0;
+
+				ldap_pvt_thread_mutex_lock( &age->age_mutex );
+
+				if ( age->age_filter && age->age_filter->agf_anlist ) {
+					ea = attrs_find( attrs, age->age_filter->agf_anlist[0].an_desc );
+				}
+				else {
+					ea = NULL;
+				}
+
+				if ( age->age_modrdn_olddnmodified ) {
+					/* Resquest already marked this group to be updated */
+					is_olddn = 1;
+					is_value_refresh = 1;
+					age->age_modrdn_olddnmodified = 0;
+				} else {
+
+					if ( overlay_entry_get_ov( op, &age->age_ndn, NULL, NULL, 0, &group, on ) !=
+						LDAP_SUCCESS || group == NULL ) {
+						Debug( LDAP_DEBUG_TRACE, "autogroup_response MODRDN cannot get group entry <%s>\n", age->age_dn.bv_val, 0, 0);
+
+						op->o_tmpfree( new_dn.bv_val, op->o_tmpmemctx );
+						op->o_tmpfree( new_ndn.bv_val, op->o_tmpmemctx );
+
+						attrs_free( attrs );
+						ldap_pvt_thread_mutex_unlock( &age->age_mutex );
+						ldap_pvt_thread_mutex_unlock( &agi->agi_mutex );
+						return SLAP_CB_CONTINUE;
+					}
+
+					a = attrs_find( group->e_attrs, age->age_def->agd_member_ad );
+
+					if ( a != NULL ) {
+						if ( value_find_ex( age->age_def->agd_member_ad,
+								SLAP_MR_ATTRIBUTE_VALUE_NORMALIZED_MATCH |
+								SLAP_MR_ASSERTED_VALUE_NORMALIZED_MATCH,
+								a->a_nvals, ea ? ea->a_nvals : &op->o_req_ndn, op->o_tmpmemctx ) == 0 ) 
+						{
+							is_olddn = 1;
+						}
+
+					}
+
+					overlay_entry_release_ov( op, group, 0, on );
+
+				}
+
+				for ( agf = age->age_filter ; agf ; agf = agf->agf_next ) {
+					if ( dnIsSuffix( &new_ndn, &agf->agf_ndn ) ) {
+						/* TODO: should retest filter as it could imply conditions on the dn */
+						is_newdn = 1;
+						break;
+					}
+				}
+
+
+				if ( is_value_refresh ) {
+					if ( is_olddn != is_newdn ) {
+						/* group refresh */
+						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 );
+						}
+					}
+					ldap_pvt_thread_mutex_unlock( &age->age_mutex );
+					continue;
+				}
+				if ( is_olddn == 1 && is_newdn == 0 ) {
+					if ( ea )
+						autogroup_delete_member_values_from_group( op, &new_dn, age, ea );
+					else
+						autogroup_delete_member_from_group( op, &op->o_req_dn, &op->o_req_ndn, age );
+				} else
+				if ( is_olddn == 0 && is_newdn == 1 ) {
+					Entry etmp;
+					struct berval odn, ondn;
+					etmp.e_name = op->o_req_dn;
+					etmp.e_nname = op->o_req_ndn;
+					etmp.e_attrs = attrs;
+					odn = op->o_dn;
+					ondn = op->o_ndn;
+					op->o_dn = op->o_bd->be_rootdn;
+					op->o_ndn = op->o_bd->be_rootndn;
+
+					for ( agf = age->age_filter; agf; agf = agf->agf_next ) {
+						if ( test_filter( op, &etmp, agf->agf_filter ) == LDAP_COMPARE_TRUE ) {
+							if ( ea ) {
+								autogroup_add_member_values_to_group( op, &new_dn, age, ea );
+							} else
+								autogroup_add_member_to_group( op, &new_dn, &new_ndn, age );
+							break;
+						}
+					}
+					op->o_dn = odn;
+					op->o_ndn = ondn;
+				} else
+				if ( is_olddn == 1 && is_newdn == 1 && dn_equal != 0 ) {
+					if ( ea ) {
+						/* group refresh */
+						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 );
+						}
+					}
+					else {
+						autogroup_delete_member_from_group( op, &op->o_req_dn, &op->o_req_ndn, age );
+						autogroup_add_member_to_group( op, &new_dn, &new_ndn, age );
+					}
+				}
+
+				ldap_pvt_thread_mutex_unlock( &age->age_mutex );
+			}
+
+			op->o_tmpfree( new_dn.bv_val, op->o_tmpmemctx );
+			op->o_tmpfree( new_ndn.bv_val, op->o_tmpmemctx );
+
+			attrs_free( attrs );
+
+			ldap_pvt_thread_mutex_unlock( &agi->agi_mutex );			
+		}
+	}
+
+	if ( op->o_tag == LDAP_REQ_MODIFY ) {
+		if ( rs->sr_type == REP_RESULT && rs->sr_err == LDAP_SUCCESS  && !oex ) {
+			Entry etmp;
+			struct berval odn, ondn;
+			Debug( LDAP_DEBUG_TRACE, "==> autogroup_response MODIFY <%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_response MODIFY 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;
+			}
+
+			a = attrs_find( e->e_attrs, slap_schema.si_ad_objectClass );
+
+
+			if ( a == NULL ) {
+				Debug( LDAP_DEBUG_TRACE, "autogroup_response MODIFY entry <%s> has no objectClass\n", op->o_req_dn.bv_val, 0, 0);
+				overlay_entry_release_ov( op, e, 0, on );
+				ldap_pvt_thread_mutex_unlock( &agi->agi_mutex );		
+				return SLAP_CB_CONTINUE;
+			}
+
+			/* If we modify a group's memberURL, we have to delete all of it's members,
+			   and add them anew, because we cannot tell from which memberURL a member was added. */
+			for ( ; agd; agd = agd->agd_next ) {
+
+				if ( value_find_ex( slap_schema.si_ad_objectClass,
+						SLAP_MR_ATTRIBUTE_VALUE_NORMALIZED_MATCH |
+						SLAP_MR_ASSERTED_VALUE_NORMALIZED_MATCH,
+						a->a_nvals, &agd->agd_oc->soc_cname,
+						op->o_tmpmemctx ) == 0 )
+				{
+					Modifications	*m;
+					int		match = 1;
+
+					m = op->orm_modlist;
+
+					for ( age = agi->agi_entry ; age ; age = age->age_next ) {
+						ldap_pvt_thread_mutex_lock( &age->age_mutex );
+
+						dnMatch( &match, 0, NULL, NULL, &op->o_req_ndn, &age->age_ndn );
+
+						if ( match == 0 ) {
+							for ( ; m ; m = m->sml_next ) {
+								if ( m->sml_desc == age->age_def->agd_member_url_ad ) {
+									autogroup_def_t	*group_agd = age->age_def;
+									Debug( LDAP_DEBUG_TRACE, "autogroup_response MODIFY changing memberURL for group <%s>\n", 
+										op->o_req_dn.bv_val, 0, 0);
+
+									overlay_entry_release_ov( op, e, 0, on );
+
+									autogroup_delete_member_from_group( op, NULL, NULL, age );
+									autogroup_delete_group( agi, age );
+
+									autogroup_add_group( op, agi, group_agd, NULL, &op->o_req_ndn, 1, 1);
+
+									ldap_pvt_thread_mutex_unlock( &agi->agi_mutex );
+									return SLAP_CB_CONTINUE;
+								}
+							}
+
+							ldap_pvt_thread_mutex_unlock( &age->age_mutex );
+							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;
+				}
+			}
+
+			/* When modifying any of the attributes of an entry, we must
+			   check if the entry is in any of our groups, and if
+			   the modified entry maches any of the filters of that group.
+
+			   If the entry exists in a group, but the modified attributes do
+				not match any of the group's filters, we delete the entry from that group.
+			   If the entry doesn't exist in a group, but matches a filter, 
+				we add it to that group.
+			*/
+			attrs = attrs_dup( e->e_attrs );
+			overlay_entry_release_ov( op, e, 0, on );
+			etmp.e_name = op->o_req_dn;
+			etmp.e_nname = op->o_req_ndn;
+			etmp.e_attrs = attrs;
+			odn = op->o_dn;
+			ondn = op->o_ndn;
+			op->o_dn = op->o_bd->be_rootdn;
+			op->o_ndn = op->o_bd->be_rootndn;
+
+			for ( age = agi->agi_entry ; age ; age = age->age_next ) {
+				is_olddn = 0;
+				is_newdn = 0;
+
+				ldap_pvt_thread_mutex_lock( &age->age_mutex );
+
+				if ( age->age_filter && age->age_filter->agf_anlist ) {
+					ea = attrs_find( attrs, age->age_filter->agf_anlist[0].an_desc );
+				}
+				else {
+					ea = NULL;
+				}
+
+				if ( overlay_entry_get_ov( op, &age->age_ndn, NULL, NULL, 0, &group, on ) !=
+					LDAP_SUCCESS || group == NULL ) {
+					Debug( LDAP_DEBUG_TRACE, "autogroup_response MODIFY cannot get entry for <%s>\n", 
+						age->age_dn.bv_val, 0, 0);
+
+					attrs_free( attrs );
+					ldap_pvt_thread_mutex_unlock( &age->age_mutex );
+					ldap_pvt_thread_mutex_unlock( &agi->agi_mutex );
+					op->o_dn = odn;
+					op->o_ndn = ondn;
+					return SLAP_CB_CONTINUE;
+				}
+
+				a = attrs_find( group->e_attrs, age->age_def->agd_member_ad );
+
+				if ( a != NULL ) {
+					if ( value_find_ex( age->age_def->agd_member_ad,
+							SLAP_MR_ATTRIBUTE_VALUE_NORMALIZED_MATCH |
+							SLAP_MR_ASSERTED_VALUE_NORMALIZED_MATCH,
+							a->a_nvals, ea ? ea->a_nvals : &op->o_req_ndn, op->o_tmpmemctx ) == 0 ) 
+					{
+						is_olddn = 1;
+					}
+
+				}
+
+				overlay_entry_release_ov( op, group, 0, on );
+
+				for ( agf = age->age_filter ; agf ; agf = agf->agf_next ) {
+					if ( dnIsSuffix( &op->o_req_ndn, &agf->agf_ndn ) ) {
+						if ( test_filter( op, &etmp, agf->agf_filter ) == LDAP_COMPARE_TRUE ) {
+							is_newdn = 1;
+							break;
+						}
+					}
+				}
+
+				if ( is_olddn == 1 && is_newdn == 0 ) {
+					if(ea)
+						autogroup_delete_member_values_from_group( op, &op->o_req_dn, age, ea );
+					else
+						autogroup_delete_member_from_group( op, &op->o_req_dn, &op->o_req_ndn, age );
+				} else
+				if ( is_olddn == 0 && is_newdn == 1 ) {
+					if(ea)
+						autogroup_add_member_values_to_group( op, &op->o_req_dn, age, ea );
+					else
+						autogroup_add_member_to_group( op, &op->o_req_dn, &op->o_req_ndn, age );
+				} 
+
+				ldap_pvt_thread_mutex_unlock( &age->age_mutex );
+			}
+
+			op->o_dn = odn;
+			op->o_ndn = ondn;
+			attrs_free( attrs );
+
+			ldap_pvt_thread_mutex_unlock( &agi->agi_mutex );
+		}
+	}
+
+	return SLAP_CB_CONTINUE;
+}
+
+/*
+** Detect if filter contains a memberOf check for dn
+*/
+static int
+autogroup_memberOf_filter( Filter *f, BerValue *dn, AttributeDescription *memberof_ad )
+{
+	int result = 0;
+	if ( f == NULL ) return 0;
+
+  	switch ( f->f_choice & SLAPD_FILTER_MASK ) {
+		case LDAP_FILTER_AND:
+		case LDAP_FILTER_OR:
+		case LDAP_FILTER_NOT:
+			for ( f = f->f_un.f_un_complex; f && !result; f = f->f_next ) {
+				result = result || autogroup_memberOf_filter( f, dn, memberof_ad );
+			}
+			break;
+		case LDAP_FILTER_EQUALITY:
+			result = ( f->f_ava->aa_desc == memberof_ad &&
+			           ber_bvcmp( &f->f_ava->aa_value, dn ) == 0 );
+			break;
+		default:
+			break;
+	}
+
+	return result;
+}
+
+/*
+** When modifing a group, we must deny any modifications to the member attribute,
+** because the group would be inconsistent.
+*/
+static int
+autogroup_modify_entry( Operation *op, SlapReply *rs)
+{
+	slap_overinst		*on = (slap_overinst *)op->o_bd->bd_info;
+	autogroup_info_t		*agi = (autogroup_info_t *)on->on_bi.bi_private;
+	autogroup_def_t		*agd = agi->agi_def;
+	autogroup_entry_t	*age;
+	Entry			*e;
+	Attribute		*a;
+	struct berval odn, ondn;
+	OpExtra *oex;
+
+	LDAP_SLIST_FOREACH( oex, &op->o_extra, oe_next ) {
+		if ( oex->oe_key == (void *)&autogroup )
+			return SLAP_CB_CONTINUE;
+	}
+
+	Debug( LDAP_DEBUG_TRACE, "==> autogroup_modify_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_modify_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;
+	}
+
+	odn = op->o_dn;
+	ondn = op->o_ndn;
+	op->o_dn = op->o_bd->be_rootdn;
+	op->o_ndn = op->o_bd->be_rootndn;
+
+	/* Must refresh groups if a matching member value is modified OR filter contains memberOf=DN */
+	for ( age = agi->agi_entry; age ; age = age->age_next ) {
+		autogroup_filter_t	*agf;
+		for ( agf = age->age_filter ; agf ; agf = agf->agf_next ) {
+			if ( agf->agf_anlist ) {
+				Modifications	*m;
+				for ( m = op->orm_modlist ; m ; m = m->sml_next ) {
+					if ( m->sml_desc == agf->agf_anlist[0].an_desc ) {
+						if ( dnIsSuffix( &op->o_req_ndn, &agf->agf_ndn ) ) {
+							int rc = test_filter( op, e, agf->agf_filter );
+							if ( rc == LDAP_COMPARE_TRUE ) {
+								age->age_mustrefresh = 1;
+							}
+						}
+					}
+				}
+			}
+
+			if ( autogroup_memberOf_filter( agf->agf_filter, &op->o_req_ndn, agi->agi_memberof_ad ) ) {
+				age->age_mustrefresh = 1;
+			}
+		}
+	}
+	op->o_dn = odn;
+	op->o_ndn = ondn;
+
+	a = attrs_find( e->e_attrs, slap_schema.si_ad_objectClass );
+
+	if ( a == NULL ) {
+		Debug( LDAP_DEBUG_TRACE, "autogroup_modify_entry entry <%s> has no objectClass\n", op->o_req_dn.bv_val, 0, 0);
+		ldap_pvt_thread_mutex_unlock( &agi->agi_mutex );		
+		return SLAP_CB_CONTINUE;
+	}
+
+
+	for ( ; agd; agd = agd->agd_next ) {
+
+		if ( value_find_ex( slap_schema.si_ad_objectClass,
+				SLAP_MR_ATTRIBUTE_VALUE_NORMALIZED_MATCH |
+				SLAP_MR_ASSERTED_VALUE_NORMALIZED_MATCH,
+				a->a_nvals, &agd->agd_oc->soc_cname,
+				op->o_tmpmemctx ) == 0 )
+		{
+			Modifications	*m;
+			int		match = 1;
+
+			m = op->orm_modlist;
+
+			for ( age = agi->agi_entry ; age ; age = age->age_next ) {
+				dnMatch( &match, 0, NULL, NULL, &op->o_req_ndn, &age->age_ndn );
+
+				if ( match == 0 ) {
+					for ( ; m ; m = m->sml_next ) {
+						if ( m->sml_desc == age->age_def->agd_member_ad ) {
+							overlay_entry_release_ov( op, e, 0, on );
+							ldap_pvt_thread_mutex_unlock( &agi->agi_mutex );
+							Debug( LDAP_DEBUG_TRACE, "autogroup_modify_entry attempted to modify group's <%s> member attribute\n", op->o_req_dn.bv_val, 0, 0);
+							send_ldap_error(op, rs, LDAP_CONSTRAINT_VIOLATION, "attempt to modify dynamic group member attribute");
+							return LDAP_CONSTRAINT_VIOLATION;
+						}
+					}
+					break;
+				}
+			}
+
+			/* an entry may only have one dynamic group class */
+			break;
+		}
+	}
+
+	overlay_entry_release_ov( op, e, 0, on );
+	ldap_pvt_thread_mutex_unlock( &agi->agi_mutex );			
+	return SLAP_CB_CONTINUE;
+}
+
+/*
+** Detect if the olddn is part of a group and so if the group should be refreshed
+*/
+static int
+autogroup_modrdn_entry( Operation *op, SlapReply *rs)
+{
+	slap_overinst		*on = (slap_overinst *)op->o_bd->bd_info;
+	autogroup_info_t	*agi = (autogroup_info_t *)on->on_bi.bi_private;
+	autogroup_entry_t	*age;
+	Entry			*e;
+	struct berval odn, ondn;
+	OpExtra *oex;
+
+	LDAP_SLIST_FOREACH( oex, &op->o_extra, oe_next ) {
+		if ( oex->oe_key == (void *)&autogroup )
+			return SLAP_CB_CONTINUE;
+	}
+
+	Debug( LDAP_DEBUG_TRACE, "==> autogroup_modrdn_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_modrdn_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;
+	}
+
+	odn = op->o_dn;
+	ondn = op->o_ndn;
+	op->o_dn = op->o_bd->be_rootdn;
+	op->o_ndn = op->o_bd->be_rootndn;
+
+	/* Must check if a dn is modified */
+	for ( age = agi->agi_entry; age ; age = age->age_next ) {
+		autogroup_filter_t	*agf;
+		for ( agf = age->age_filter ; agf ; agf = agf->agf_next ) {
+			if ( agf->agf_anlist ) {
+				if ( dnIsSuffix( &op->o_req_ndn, &agf->agf_ndn ) ) {
+					int rc = test_filter( op, e, agf->agf_filter );
+					if ( rc == LDAP_COMPARE_TRUE ) {
+						age->age_modrdn_olddnmodified = 1;
+					}
+				}
+			}
+		}
+	}
+	op->o_dn = odn;
+	op->o_ndn = ondn;
+
+	overlay_entry_release_ov( op, e, 0, on );
+	ldap_pvt_thread_mutex_unlock( &agi->agi_mutex );			
+	return SLAP_CB_CONTINUE;
+}
+
+/* 
+** Builds a filter for searching for the 
+** group entries, according to the objectClass. 
+*/
+static int
+autogroup_build_def_filter( autogroup_def_t *agd, Operation *op )
+{
+	char	*ptr;
+
+	Debug( LDAP_DEBUG_TRACE, "==> autogroup_build_def_filter\n", 0, 0, 0);
+
+	op->ors_filterstr.bv_len = STRLENOF( "(=)" ) 
+			+ slap_schema.si_ad_objectClass->ad_cname.bv_len
+			+ agd->agd_oc->soc_cname.bv_len;
+	ptr = op->ors_filterstr.bv_val = op->o_tmpalloc( op->ors_filterstr.bv_len + 1, op->o_tmpmemctx );
+	*ptr++ = '(';
+	ptr = lutil_strcopy( ptr, slap_schema.si_ad_objectClass->ad_cname.bv_val );
+	*ptr++ = '=';
+	ptr = lutil_strcopy( ptr, agd->agd_oc->soc_cname.bv_val );
+	*ptr++ = ')';
+	*ptr = '\0';
+
+	op->ors_filter = str2filter_x( op, op->ors_filterstr.bv_val );
+
+	assert( op->ors_filterstr.bv_len == ptr - op->ors_filterstr.bv_val );
+
+	return 0;
+}
+
+enum {
+	AG_ATTRSET = 1,
+	AG_MEMBER_OF_AD,
+	AG_LAST
+};
+
+static ConfigDriver	ag_cfgen;
+
+static ConfigTable agcfg[] = {
+	{ "autogroup-attrset", "group-oc> <URL-ad> <member-ad",
+		4, 4, 0, ARG_MAGIC|AG_ATTRSET, ag_cfgen,
+		"( OLcfgCtAt:2.1 NAME 'olcAGattrSet' "
+			"DESC 'Automatic groups: <group objectClass>, <URL attributeDescription>, <member attributeDescription>' "
+			"EQUALITY caseIgnoreMatch "
+			"SYNTAX OMsDirectoryString "
+			"X-ORDERED 'VALUES' )",
+			NULL, NULL },
+	
+	{ "autogroup-memberof-ad", "memberOf attribute",
+		2, 2, 0, ARG_MAGIC|AG_MEMBER_OF_AD, ag_cfgen,
+		"( OLcfgCtAt:2.2 NAME 'olcAGmemberOfAd' "
+			"DESC 'memberOf attribute' "
+			"SYNTAX OMsDirectoryString SINGLE-VALUE )",
+			NULL, NULL },
+
+	{ NULL, NULL, 0, 0, 0, ARG_IGNORED }
+};
+
+static ConfigOCs agocs[] = {
+	{ "( OLcfgCtOc:2.1 "
+		"NAME 'olcAutomaticGroups' "
+		"DESC 'Automatic groups configuration' "
+		"SUP olcOverlayConfig "
+		"MAY ( "
+			"olcAGattrSet "
+			"$ olcAGmemberOfAd "
+		    ")"
+	  ")",
+		Cft_Overlay, agcfg, NULL, NULL },
+	{ NULL, 0, NULL }
+};
+
+
+static int
+ag_cfgen( ConfigArgs *c )
+{
+	slap_overinst		*on = (slap_overinst *)c->bi;
+	autogroup_info_t		*agi = (autogroup_info_t *)on->on_bi.bi_private;
+	autogroup_def_t		*agd;
+	autogroup_entry_t	*age;
+
+	int rc = 0, i;
+
+	Debug( LDAP_DEBUG_TRACE, "==> autogroup_cfgen\n", 0, 0, 0);
+
+	if( agi == NULL ) {
+		agi = (autogroup_info_t*)ch_calloc( 1, sizeof(autogroup_info_t) );
+		ldap_pvt_thread_mutex_init( &agi->agi_mutex );
+		agi->agi_def = NULL;
+		agi->agi_entry = NULL;
+		on->on_bi.bi_private = (void *)agi;
+	}
+
+	agd = agi->agi_def;
+	age = agi->agi_entry;
+
+	if ( c->op == SLAP_CONFIG_EMIT ) {
+
+		switch( c->type ){
+		case AG_ATTRSET:
+			for ( i = 0 ; agd ; i++, agd = agd->agd_next ) {
+				struct berval	bv;
+				char		*ptr = c->cr_msg;
+	
+				assert(agd->agd_oc != NULL);
+				assert(agd->agd_member_url_ad != NULL);
+				assert(agd->agd_member_ad != NULL);
+	
+				ptr += snprintf( c->cr_msg, sizeof( c->cr_msg ),
+					SLAP_X_ORDERED_FMT "%s %s %s", i,
+					agd->agd_oc->soc_cname.bv_val,
+					agd->agd_member_url_ad->ad_cname.bv_val,
+					agd->agd_member_ad->ad_cname.bv_val );
+	
+				bv.bv_val = c->cr_msg;
+				bv.bv_len = ptr - bv.bv_val;
+				value_add_one ( &c->rvalue_vals, &bv );
+	
+			}
+			break;
+
+		case AG_MEMBER_OF_AD:
+			if ( agi->agi_memberof_ad != NULL ){
+				value_add_one( &c->rvalue_vals, &agi->agi_memberof_ad->ad_cname );
+			}
+			break;
+
+		default:
+			assert( 0 );
+			return 1;
+      }
+
+		return rc;
+
+	}else if ( c->op == LDAP_MOD_DELETE ) {
+		if ( c->valx < 0) {
+			autogroup_def_t 		*agd_next;
+			autogroup_entry_t	*age_next;
+			autogroup_filter_t	*agf = age->age_filter,
+						*agf_next;
+
+			for ( agd_next = agd; agd_next; agd = agd_next ) {
+				agd_next = agd->agd_next;
+
+				ch_free( agd );
+			}
+
+			for ( age_next = age ; age_next ; age = age_next ) {
+				age_next = age->age_next;
+
+				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 );
+					anlist_free( agf->agf_anlist, 1, NULL );
+					ch_free( agf );
+				}
+
+				ldap_pvt_thread_mutex_init( &age->age_mutex );
+				ch_free( age );
+			}
+
+			ch_free( agi );
+			on->on_bi.bi_private = NULL;
+
+		} else {
+			autogroup_def_t		**agdp;
+			autogroup_entry_t	*age_next, *age_prev;
+			autogroup_filter_t	*agf,
+						*agf_next;
+
+			for ( i = 0, agdp = &agi->agi_def;
+				i < c->valx; i++ ) 
+			{
+				if ( *agdp == NULL) {
+					return 1;
+				}
+				agdp = &(*agdp)->agd_next;
+			}
+
+			agd = *agdp;
+			*agdp = agd->agd_next;
+
+			for ( age_next = age , age_prev = NULL ; age_next ; age_prev = age, age = age_next ) {
+				age_next = age->age_next;
+
+				if( age->age_def == agd ) {
+					agf = age->age_filter;
+
+					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 );
+						anlist_free( agf->agf_anlist, 1, NULL );
+						ch_free( agf );
+					}
+
+					ldap_pvt_thread_mutex_destroy( &age->age_mutex );
+					ch_free( age );
+
+					age = age_prev;
+
+					if( age_prev != NULL ) {
+						age_prev->age_next = age_next;
+					}
+				}
+			}
+
+			ch_free( agd );
+			agd = agi->agi_def;
+
+		}
+
+		return rc;
+	}
+
+	switch(c->type){
+	case AG_ATTRSET: {
+		autogroup_def_t		**agdp,
+					*agd_next = NULL;
+		ObjectClass		*oc = NULL;
+		AttributeDescription	*member_url_ad = NULL,
+					*member_ad = NULL;
+		const char		*text;
+
+
+		oc = oc_find( c->argv[ 1 ] );
+		if( oc == NULL ){
+			snprintf( c->cr_msg, sizeof( c->cr_msg ),
+				"\"autogroup-attrset <oc> <URL-ad> <member-ad>\": "
+				"unable to find ObjectClass \"%s\"",
+				c->argv[ 1 ] );
+			Debug( LDAP_DEBUG_ANY, "%s: %s.\n",
+				c->log, c->cr_msg, 0 );
+			return 1;
+		}
+
+
+		rc = slap_str2ad( c->argv[ 2 ], &member_url_ad, &text );
+		if( rc != LDAP_SUCCESS ) {
+			snprintf( c->cr_msg, sizeof( c->cr_msg ),
+				"\"autogroup-attrset <oc> <URL-ad> <member-ad>\": "
+				"unable to find AttributeDescription \"%s\"",
+				c->argv[ 2 ] );
+			Debug( LDAP_DEBUG_ANY, "%s: %s.\n",
+				c->log, c->cr_msg, 0 );		
+			return 1;
+		}
+
+		if( !is_at_subtype( member_url_ad->ad_type, slap_schema.si_ad_labeledURI->ad_type ) ) {
+			snprintf( c->cr_msg, sizeof( c->cr_msg ),
+				"\"autogroup-attrset <oc> <URL-ad> <member-ad>\": "
+				"AttributeDescription \"%s\" ",
+				"must be of a subtype \"labeledURI\"",
+				c->argv[ 2 ] );
+			Debug( LDAP_DEBUG_ANY, "%s: %s.\n",
+				c->log, c->cr_msg, 0 );
+			return 1;
+		}
+
+		rc = slap_str2ad( c->argv[3], &member_ad, &text );
+		if( rc != LDAP_SUCCESS ) {
+			snprintf( c->cr_msg, sizeof( c->cr_msg ),
+				"\"autogroup-attrset <oc> <URL-ad> <member-ad>\": "
+				"unable to find AttributeDescription \"%s\"",
+				c->argv[ 3 ] );
+			Debug( LDAP_DEBUG_ANY, "%s: %s.\n",
+				c->log, c->cr_msg, 0 );
+			return 1;
+		}
+
+		for ( agdp = &agi->agi_def ; *agdp ; agdp = &(*agdp)->agd_next ) {
+			/* The same URL attribute / member attribute pair
+			* cannot be repeated */
+
+			if ( (*agdp)->agd_member_url_ad == member_url_ad && (*agdp)->agd_member_ad == member_ad ) {
+				snprintf( c->cr_msg, sizeof( c->cr_msg ),
+					"\"autogroup-attrset <oc> <URL-ad> <member-ad>\": "
+					"URL attributeDescription \"%s\" already mapped",
+					member_ad->ad_cname.bv_val );
+				Debug( LDAP_DEBUG_ANY, "%s: %s.\n",
+					c->log, c->cr_msg, 0 );
+/*				return 1; //warning*/
+			}
+		}
+
+		if ( c->valx > 0 ) {
+			int	i;
+
+			for ( i = 0, agdp = &agi->agi_def ;
+				i < c->valx; i++ )
+			{
+				if ( *agdp == NULL ) {
+					snprintf( c->cr_msg, sizeof( c->cr_msg ),
+						"\"autogroup-attrset <oc> <URL-ad> <member-ad>\": "
+						"invalid index {%d}",
+						c->valx );
+					Debug( LDAP_DEBUG_ANY, "%s: %s.\n",
+						c->log, c->cr_msg, 0 );
+
+					return 1;
+				}
+				agdp = &(*agdp)->agd_next;
+			}
+			agd_next = *agdp;
+
+		} else {
+			for ( agdp = &agi->agi_def; *agdp;
+				agdp = &(*agdp)->agd_next )
+				/* goto last */;
+		}
+
+		*agdp = (autogroup_def_t *)ch_calloc( 1, sizeof(autogroup_info_t));
+
+		(*agdp)->agd_oc = oc;
+		(*agdp)->agd_member_url_ad = member_url_ad;
+		(*agdp)->agd_member_ad = member_ad;
+		(*agdp)->agd_next = agd_next;
+
+		} break;
+	
+	case AG_MEMBER_OF_AD: {
+		AttributeDescription *memberof_ad = NULL;
+		const char     *text;
+
+		rc = slap_str2ad( c->argv[ 1 ], &memberof_ad, &text );
+		if( rc != LDAP_SUCCESS ) {
+			snprintf( c->cr_msg, sizeof( c->cr_msg ),
+				"\"autogroup-memberof-ad <memberof-ad>\": "
+				"unable to find AttributeDescription \"%s\"",
+				c->argv[ 1 ] );
+			Debug( LDAP_DEBUG_ANY, "%s: %s.\n",
+				c->log, c->cr_msg, 0 );
+			return 1;
+		}
+
+		if ( !is_at_syntax( memberof_ad->ad_type, SLAPD_DN_SYNTAX )    /* e.g. "member" */
+		     && !is_at_syntax( memberof_ad->ad_type, SLAPD_NAMEUID_SYNTAX ) )  /* e.g. "uniqueMember" */
+		{
+			snprintf( c->cr_msg, sizeof( c->cr_msg ),
+				"memberof attribute=\"%s\" must either "
+				"have DN (%s) or nameUID (%s) syntax",
+				c->argv[ 1 ], SLAPD_DN_SYNTAX, SLAPD_NAMEUID_SYNTAX );
+			Debug( LDAP_DEBUG_ANY, "%s: %s.\n",
+				c->log, c->cr_msg, 0 );
+			return 1;
+		}
+
+		agi->agi_memberof_ad = memberof_ad;
+
+		} break;
+
+	default:
+		rc = 1;
+		break;
+	}
+
+	return rc;
+}
+
+extern int slapMode;
+
+/* 
+** Do a search for all the groups in the
+** database, and add them to out internal list.
+*/
+static int
+autogroup_db_open(
+	BackendDB	*be,
+	ConfigReply	*cr )
+{
+	slap_overinst			*on = (slap_overinst *) be->bd_info;
+	autogroup_info_t		*agi = on->on_bi.bi_private;
+	autogroup_def_t		*agd;
+	autogroup_sc_t		ags;
+	Operation		*op;
+	slap_callback		cb = { 0 };
+
+	void				*thrctx = ldap_pvt_thread_pool_context();
+	Connection			conn = { 0 };
+	OperationBuffer 	opbuf;
+
+	Debug( LDAP_DEBUG_TRACE, "==> autogroup_db_open\n", 0, 0, 0);
+
+	if ( agi == NULL || !( slapMode & SLAP_SERVER_MODE )) {
+		return 0;
+	}
+
+	connection_fake_init( &conn, &opbuf, thrctx );
+	op = &opbuf.ob_op;
+
+	op->ors_attrsonly = 0;
+	op->o_tag = LDAP_REQ_SEARCH;
+	op->o_dn = be->be_rootdn;
+	op->o_ndn = be->be_rootndn;
+
+	op->o_req_dn = be->be_suffix[0];
+	op->o_req_ndn = be->be_nsuffix[0];
+
+	op->ors_scope = LDAP_SCOPE_SUBTREE;
+	op->ors_deref = LDAP_DEREF_NEVER;
+	op->ors_limit = NULL;
+	op->ors_tlimit = SLAP_NO_LIMIT;
+	op->ors_slimit = SLAP_NO_LIMIT;
+	op->ors_attrs =  slap_anlist_no_attrs;
+	op->o_do_not_cache = 1;
+
+	op->o_bd = be;
+	op->o_bd->bd_info = (BackendInfo *)on->on_info;
+
+	ags.ags_info = agi;
+	cb.sc_private = &ags;
+	cb.sc_response = autogroup_group_add_cb;
+	cb.sc_cleanup = NULL;
+	cb.sc_next = NULL;
+
+	op->o_callback = &cb;
+
+	for (agd = agi->agi_def ; agd ; agd = agd->agd_next) {
+		SlapReply	rs = { REP_RESULT };
+
+		autogroup_build_def_filter(agd, op);
+
+		ags.ags_def = agd;
+
+		op->o_bd->be_search( op, &rs );
+
+		filter_free_x( op, op->ors_filter, 1 );
+		op->o_tmpfree( op->ors_filterstr.bv_val, op->o_tmpmemctx );
+	}		
+
+	if( ! agi->agi_memberof_ad ){
+		int			rc;
+		const char		*text = NULL;
+		
+		rc = slap_str2ad( SLAPD_MEMBEROF_ATTR, &agi->agi_memberof_ad, &text );
+		if ( rc != LDAP_SUCCESS ) {
+			Debug( LDAP_DEBUG_ANY, "autogroup_db_open: "
+			"unable to find attribute=\"%s\": %s (%d)\n",
+			SLAPD_MEMBEROF_ATTR, text, rc );
+			return rc;
+		}
+	}
+
+	return 0;
+}
+
+static int
+autogroup_db_close(
+	BackendDB	*be,
+	ConfigReply	*cr )
+{
+	slap_overinst			*on = (slap_overinst *) be->bd_info;
+
+	Debug( LDAP_DEBUG_TRACE, "==> autogroup_db_close\n", 0, 0, 0);
+
+	if ( on->on_bi.bi_private ) {
+		autogroup_info_t		*agi = on->on_bi.bi_private;
+		autogroup_entry_t	*age = agi->agi_entry,
+					*age_next;
+		autogroup_filter_t	*agf, *agf_next;
+
+		for ( age_next = age; age_next; age = age_next ) {
+			age_next = age->age_next;
+
+			ch_free( age->age_dn.bv_val );
+			ch_free( age->age_ndn.bv_val );
+
+			agf = age->age_filter;
+
+			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 );	
+				anlist_free( agf->agf_anlist, 1, NULL );
+				ch_free( agf );
+			}
+
+			ldap_pvt_thread_mutex_destroy( &age->age_mutex );
+			ch_free( age );
+		}
+	}
+
+	return 0;
+}
+
+static int
+autogroup_db_destroy(
+	BackendDB	*be,
+	ConfigReply	*cr )
+{
+	slap_overinst			*on = (slap_overinst *) be->bd_info;
+
+	Debug( LDAP_DEBUG_TRACE, "==> autogroup_db_destroy\n", 0, 0, 0);
+
+	if ( on->on_bi.bi_private ) {
+		autogroup_info_t		*agi = on->on_bi.bi_private;
+		autogroup_def_t		*agd = agi->agi_def,
+					*agd_next;
+
+		for ( agd_next = agd; agd_next; agd = agd_next ) {
+			agd_next = agd->agd_next;
+
+			ch_free( agd );
+		}
+
+		ldap_pvt_thread_mutex_destroy( &agi->agi_mutex );
+		ch_free( agi );
+	}
+
+	return 0;
+}
+
+static
+int
+autogroup_initialize(void)
+{
+	int		rc = 0;
+	autogroup.on_bi.bi_type = "autogroup";
+
+	autogroup.on_bi.bi_db_open = autogroup_db_open;
+	autogroup.on_bi.bi_db_close = autogroup_db_close;
+	autogroup.on_bi.bi_db_destroy = autogroup_db_destroy;
+
+	autogroup.on_bi.bi_op_add = autogroup_add_entry;
+	autogroup.on_bi.bi_op_delete = autogroup_delete_entry;
+	autogroup.on_bi.bi_op_modify = autogroup_modify_entry;
+	autogroup.on_bi.bi_op_modrdn = autogroup_modrdn_entry;
+
+	autogroup.on_response = autogroup_response;
+
+	autogroup.on_bi.bi_cf_ocs = agocs;
+
+	rc = config_register_schema( agcfg, agocs );
+	if ( rc ) {
+		return rc;
+	}
+
+	return overlay_register( &autogroup );
+}
+
+int
+init_module( int argc, char *argv[] )
+{
+	return autogroup_initialize();
+}