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, 2763 insertions, 0 deletions

diff --git a/servers/slapd/overlays/rwm.c b/servers/slapd/overlays/rwm.c
new file mode 100644
index 0000000..4bedbf6
--- /dev/null
+++ b/servers/slapd/overlays/rwm.c
@@ -0,0 +1,2763 @@
+/* rwm.c - rewrite/remap operations */
+/* $OpenLDAP$ */
+/* This work is part of OpenLDAP Software <http://www.openldap.org/>.
+ *
+ * Copyright 2003-2021 The OpenLDAP Foundation.
+ * Portions Copyright 2003 Pierangelo Masarati.
+ * 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>.
+ */
+
+#include "portable.h"
+
+#ifdef SLAPD_OVER_RWM
+
+#include <stdio.h>
+
+#include <ac/string.h>
+
+#include "slap.h"
+#include "config.h"
+#include "lutil.h"
+#include "rwm.h"
+
+typedef struct rwm_op_state {
+	ber_tag_t r_tag;
+	struct berval ro_dn;
+	struct berval ro_ndn;
+	struct berval r_dn;
+	struct berval r_ndn;
+	struct berval rx_dn;
+	struct berval rx_ndn;
+	AttributeName *mapped_attrs;
+	OpRequest o_request;
+} rwm_op_state;
+
+typedef struct rwm_op_cb {
+	slap_callback cb;
+	rwm_op_state ros;
+} rwm_op_cb;
+
+static int
+rwm_db_destroy( BackendDB *be, ConfigReply *cr );
+
+static int
+rwm_send_entry( Operation *op, SlapReply *rs );
+
+static void
+rwm_op_rollback( Operation *op, SlapReply *rs, rwm_op_state *ros )
+{
+	/* in case of successful extended operation cleanup
+	 * gets called *after* (ITS#6632); this hack counts
+	 * on others to cleanup our o_req_dn/o_req_ndn,
+	 * while we cleanup theirs. */
+	if ( ros->r_tag == LDAP_REQ_EXTENDED && rs->sr_err == LDAP_SUCCESS ) {
+		if ( !BER_BVISNULL( &ros->rx_dn ) ) {
+			ch_free( ros->rx_dn.bv_val );
+		}
+		if ( !BER_BVISNULL( &ros->rx_ndn ) ) {
+			ch_free( ros->rx_ndn.bv_val );
+		}
+
+	} else {
+		if ( !BER_BVISNULL( &ros->ro_dn ) ) {
+			op->o_req_dn = ros->ro_dn;
+		}
+		if ( !BER_BVISNULL( &ros->ro_ndn ) ) {
+			op->o_req_ndn = ros->ro_ndn;
+		}
+
+		if ( !BER_BVISNULL( &ros->r_dn )
+			&& ros->r_dn.bv_val != ros->ro_dn.bv_val )
+		{
+			assert( ros->r_dn.bv_val != ros->r_ndn.bv_val );
+			ch_free( ros->r_dn.bv_val );
+		}
+
+		if ( !BER_BVISNULL( &ros->r_ndn )
+			&& ros->r_ndn.bv_val != ros->ro_ndn.bv_val )
+		{
+			ch_free( ros->r_ndn.bv_val );
+		}
+	}
+
+	BER_BVZERO( &ros->r_dn );
+	BER_BVZERO( &ros->r_ndn );
+	BER_BVZERO( &ros->ro_dn );
+	BER_BVZERO( &ros->ro_ndn );
+	BER_BVZERO( &ros->rx_dn );
+	BER_BVZERO( &ros->rx_ndn );
+
+	switch( ros->r_tag ) {
+	case LDAP_REQ_COMPARE:
+		if ( op->orc_ava->aa_value.bv_val != ros->orc_ava->aa_value.bv_val )
+			op->o_tmpfree( op->orc_ava->aa_value.bv_val, op->o_tmpmemctx );
+		op->orc_ava = ros->orc_ava;
+		break;
+	case LDAP_REQ_MODIFY:
+		slap_mods_free( op->orm_modlist, 1 );
+		op->orm_modlist = ros->orm_modlist;
+		break;
+	case LDAP_REQ_MODRDN:
+		if ( op->orr_newSup != ros->orr_newSup ) {
+			if ( op->orr_newSup ) {
+				ch_free( op->orr_newSup->bv_val );
+				ch_free( op->orr_nnewSup->bv_val );
+				op->o_tmpfree( op->orr_newSup, op->o_tmpmemctx );
+				op->o_tmpfree( op->orr_nnewSup, op->o_tmpmemctx );
+			}
+			op->orr_newSup = ros->orr_newSup;
+			op->orr_nnewSup = ros->orr_nnewSup;
+		}
+		if ( op->orr_newrdn.bv_val != ros->orr_newrdn.bv_val ) {
+			ch_free( op->orr_newrdn.bv_val );
+			ch_free( op->orr_nnewrdn.bv_val );
+			op->orr_newrdn = ros->orr_newrdn;
+			op->orr_nnewrdn = ros->orr_nnewrdn;
+		}
+		break;
+	case LDAP_REQ_SEARCH:
+		op->o_tmpfree( ros->mapped_attrs, op->o_tmpmemctx );
+		op->ors_attrs = ros->ors_attrs;
+		if ( op->ors_filter != ros->ors_filter ) {
+			filter_free_x( op, op->ors_filter, 1 );
+			op->ors_filter = ros->ors_filter;
+		}
+		if ( op->ors_filterstr.bv_val != ros->ors_filterstr.bv_val ) {
+			op->o_tmpfree( op->ors_filterstr.bv_val, op->o_tmpmemctx );
+			op->ors_filterstr = ros->ors_filterstr;
+		}
+		break;
+	case LDAP_REQ_EXTENDED:
+		if ( op->ore_reqdata != ros->ore_reqdata ) {
+			ber_bvfree( op->ore_reqdata );
+			op->ore_reqdata = ros->ore_reqdata;
+		}
+		break;
+	case LDAP_REQ_BIND:
+		if ( rs->sr_err == LDAP_SUCCESS ) {
+#if 0
+			ldap_pvt_thread_mutex_lock( &op->o_conn->c_mutex );
+			/* too late, c_mutex released */
+			Debug( LDAP_DEBUG_ANY, "*** DN: \"%s\" => \"%s\"\n",
+				op->o_conn->c_ndn.bv_val,
+				op->o_req_ndn.bv_val );
+			ber_bvreplace( &op->o_conn->c_ndn,
+				&op->o_req_ndn );
+			ldap_pvt_thread_mutex_unlock( &op->o_conn->c_mutex );
+#endif
+		}
+		break;
+	default:	break;
+	}
+}
+
+static int
+rwm_op_cleanup( Operation *op, SlapReply *rs )
+{
+	slap_callback	*cb = op->o_callback;
+	rwm_op_state *ros = cb->sc_private;
+
+	if ( rs->sr_type == REP_RESULT || rs->sr_type == REP_EXTENDED ||
+		op->o_abandon || rs->sr_err == SLAPD_ABANDON )
+	{
+		rwm_op_rollback( op, rs, ros );
+
+		op->o_callback = op->o_callback->sc_next;
+		op->o_tmpfree( cb, op->o_tmpmemctx );
+	}
+
+	return SLAP_CB_CONTINUE;
+}
+
+static rwm_op_cb *
+rwm_callback_get( Operation *op )
+{
+	rwm_op_cb	*roc;
+
+	roc = op->o_tmpcalloc( 1, sizeof( struct rwm_op_cb ), op->o_tmpmemctx );
+	roc->cb.sc_cleanup = rwm_op_cleanup;
+	roc->cb.sc_response = NULL;
+	roc->cb.sc_next = op->o_callback;
+	roc->cb.sc_private = &roc->ros;
+	roc->ros.r_tag = op->o_tag;
+	roc->ros.ro_dn = op->o_req_dn;
+	roc->ros.ro_ndn = op->o_req_ndn;
+	BER_BVZERO( &roc->ros.r_dn );
+	BER_BVZERO( &roc->ros.r_ndn );
+	BER_BVZERO( &roc->ros.rx_dn );
+	BER_BVZERO( &roc->ros.rx_ndn );
+	roc->ros.mapped_attrs = NULL;
+	roc->ros.o_request = op->o_request;
+
+	return roc;
+}
+
+
+static int
+rwm_op_dn_massage( Operation *op, SlapReply *rs, void *cookie,
+	rwm_op_state *ros )
+{
+	slap_overinst		*on = (slap_overinst *) op->o_bd->bd_info;
+	struct ldaprwmap	*rwmap = 
+			(struct ldaprwmap *)on->on_bi.bi_private;
+
+	struct berval		dn = BER_BVNULL,
+				ndn = BER_BVNULL;
+	int			rc = 0;
+	dncookie		dc;
+
+	/*
+	 * Rewrite the dn if needed
+	 */
+	dc.rwmap = rwmap;
+	dc.conn = op->o_conn;
+	dc.rs = rs;
+	dc.ctx = (char *)cookie;
+
+	/* NOTE: in those cases where only the ndn is available,
+	 * and the caller sets op->o_req_dn = op->o_req_ndn,
+	 * only rewrite the op->o_req_ndn and use it as 
+	 * op->o_req_dn as well */
+	ndn = op->o_req_ndn;
+	if ( op->o_req_dn.bv_val != op->o_req_ndn.bv_val ) {
+		dn = op->o_req_dn;
+		rc = rwm_dn_massage_pretty_normalize( &dc, &op->o_req_dn, &dn, &ndn );
+	} else {
+		rc = rwm_dn_massage_normalize( &dc, &op->o_req_ndn, &ndn );
+	}
+
+	if ( rc != LDAP_SUCCESS ) {
+		return rc;
+	}
+
+	if ( ( op->o_req_dn.bv_val != op->o_req_ndn.bv_val && dn.bv_val == op->o_req_dn.bv_val )
+			|| ndn.bv_val == op->o_req_ndn.bv_val )
+	{
+		return LDAP_SUCCESS;
+	}
+
+	if ( op->o_req_dn.bv_val != op->o_req_ndn.bv_val ) {
+		op->o_req_dn = dn;
+		assert( BER_BVISNULL( &ros->r_dn ) );
+		ros->r_dn = dn;
+	} else {
+		op->o_req_dn = ndn;
+	}
+	op->o_req_ndn = ndn;
+	assert( BER_BVISNULL( &ros->r_ndn ) );
+	ros->r_ndn = ndn;
+
+	if ( ros->r_tag == LDAP_REQ_EXTENDED ) {
+		ros->rx_dn = ros->r_dn;
+		ros->rx_ndn = ros->r_ndn;
+	}
+
+	return LDAP_SUCCESS;
+}
+
+static int
+rwm_op_add( Operation *op, SlapReply *rs )
+{
+	slap_overinst		*on = (slap_overinst *) op->o_bd->bd_info;
+	struct ldaprwmap	*rwmap = 
+			(struct ldaprwmap *)on->on_bi.bi_private;
+
+	int			rc,
+				i;
+	Attribute		**ap = NULL;
+	char			*olddn = op->o_req_dn.bv_val;
+	int			isupdate;
+
+	rwm_op_cb		*roc = rwm_callback_get( op );
+
+	rc = rwm_op_dn_massage( op, rs, "addDN", &roc->ros );
+	if ( rc != LDAP_SUCCESS ) {
+		op->o_bd->bd_info = (BackendInfo *)on->on_info;
+		send_ldap_error( op, rs, rc, "addDN massage error" );
+		return -1;
+	}
+
+	if ( olddn != op->o_req_dn.bv_val ) {
+		ber_bvreplace( &op->ora_e->e_name, &op->o_req_dn );
+		ber_bvreplace( &op->ora_e->e_nname, &op->o_req_ndn );
+	}
+
+	/* Count number of attributes in entry */ 
+	isupdate = be_shadow_update( op );
+	for ( i = 0, ap = &op->oq_add.rs_e->e_attrs; *ap; ) {
+		Attribute	*a;
+
+		if ( (*ap)->a_desc == slap_schema.si_ad_objectClass ||
+				(*ap)->a_desc == slap_schema.si_ad_structuralObjectClass )
+		{
+			int		j, last;
+
+			last = (*ap)->a_numvals - 1;
+			for ( j = 0; !BER_BVISNULL( &(*ap)->a_vals[ j ] ); j++ ) {
+				struct ldapmapping	*mapping = NULL;
+
+				( void )rwm_mapping( &rwmap->rwm_oc, &(*ap)->a_vals[ j ],
+						&mapping, RWM_MAP );
+				if ( mapping == NULL ) {
+					if ( rwmap->rwm_at.drop_missing ) {
+						/* FIXME: we allow to remove objectClasses as well;
+						 * if the resulting entry is inconsistent, that's
+						 * the relayed database's business...
+						 */
+						ch_free( (*ap)->a_vals[ j ].bv_val );
+						if ( last > j ) {
+							(*ap)->a_vals[ j ] = (*ap)->a_vals[ last ];
+						}
+						BER_BVZERO( &(*ap)->a_vals[ last ] );
+						(*ap)->a_numvals--;
+						last--;
+						j--;
+					}
+
+				} else {
+					ch_free( (*ap)->a_vals[ j ].bv_val );
+					ber_dupbv( &(*ap)->a_vals[ j ], &mapping->m_dst );
+				}
+			}
+
+		} else if ( !isupdate && !get_relax( op ) && (*ap)->a_desc->ad_type->sat_no_user_mod )
+		{
+			goto next_attr;
+
+		} else {
+			struct ldapmapping	*mapping = NULL;
+
+			( void )rwm_mapping( &rwmap->rwm_at, &(*ap)->a_desc->ad_cname,
+					&mapping, RWM_MAP );
+			if ( mapping == NULL ) {
+				if ( rwmap->rwm_at.drop_missing ) {
+					goto cleanup_attr;
+				}
+			}
+
+			if ( (*ap)->a_desc->ad_type->sat_syntax == slap_schema.si_syn_distinguishedName
+					|| ( mapping != NULL && mapping->m_dst_ad->ad_type->sat_syntax == slap_schema.si_syn_distinguishedName ) )
+			{
+				/*
+				 * FIXME: rewrite could fail; in this case
+				 * the operation should give up, right?
+				 */
+				rc = rwm_dnattr_rewrite( op, rs, "addAttrDN",
+						(*ap)->a_vals,
+						(*ap)->a_nvals ? &(*ap)->a_nvals : NULL );
+				if ( rc ) {
+					goto cleanup_attr;
+				}
+
+			} else if ( (*ap)->a_desc == slap_schema.si_ad_ref ) {
+				rc = rwm_referral_rewrite( op, rs, "referralAttrDN",
+						(*ap)->a_vals,
+						(*ap)->a_nvals ? &(*ap)->a_nvals : NULL );
+				if ( rc != LDAP_SUCCESS ) {
+					goto cleanup_attr;
+				}
+			}
+		
+			if ( mapping != NULL ) {
+				assert( mapping->m_dst_ad != NULL );
+				(*ap)->a_desc = mapping->m_dst_ad;
+			}
+		}
+
+next_attr:;
+		ap = &(*ap)->a_next;
+		continue;
+
+cleanup_attr:;
+		/* FIXME: leaking attribute/values? */
+		a = *ap;
+
+		*ap = (*ap)->a_next;
+		attr_free( a );
+	}
+
+	op->o_callback = &roc->cb;
+
+	return SLAP_CB_CONTINUE;
+}
+
+static int
+rwm_conn_init( BackendDB *be, Connection *conn )
+{
+	slap_overinst		*on = (slap_overinst *) be->bd_info;
+	struct ldaprwmap	*rwmap = 
+			(struct ldaprwmap *)on->on_bi.bi_private;
+
+	( void )rewrite_session_init( rwmap->rwm_rw, conn );
+
+	return SLAP_CB_CONTINUE;
+}
+
+static int
+rwm_conn_destroy( BackendDB *be, Connection *conn )
+{
+	slap_overinst		*on = (slap_overinst *) be->bd_info;
+	struct ldaprwmap	*rwmap = 
+			(struct ldaprwmap *)on->on_bi.bi_private;
+
+	( void )rewrite_session_delete( rwmap->rwm_rw, conn );
+
+	return SLAP_CB_CONTINUE;
+}
+
+static int
+rwm_op_bind( Operation *op, SlapReply *rs )
+{
+	slap_overinst		*on = (slap_overinst *) op->o_bd->bd_info;
+	int			rc;
+
+	rwm_op_cb		*roc = rwm_callback_get( op );
+
+	rc = rwm_op_dn_massage( op, rs, "bindDN", &roc->ros );
+	if ( rc != LDAP_SUCCESS ) {
+		op->o_bd->bd_info = (BackendInfo *)on->on_info;
+		send_ldap_error( op, rs, rc, "bindDN massage error" );
+		return -1;
+	}
+
+	overlay_callback_after_backover( op, &roc->cb, 1 );
+
+	return SLAP_CB_CONTINUE;
+}
+
+static int
+rwm_op_unbind( Operation *op, SlapReply *rs )
+{
+	slap_overinst		*on = (slap_overinst *) op->o_bd->bd_info;
+	struct ldaprwmap	*rwmap = 
+			(struct ldaprwmap *)on->on_bi.bi_private;
+
+	rewrite_session_delete( rwmap->rwm_rw, op->o_conn );
+
+	return SLAP_CB_CONTINUE;
+}
+
+static int
+rwm_op_compare( Operation *op, SlapReply *rs )
+{
+	slap_overinst		*on = (slap_overinst *) op->o_bd->bd_info;
+	struct ldaprwmap	*rwmap = 
+			(struct ldaprwmap *)on->on_bi.bi_private;
+
+	int			rc;
+	struct berval		mapped_vals[2] = { BER_BVNULL, BER_BVNULL };
+
+	rwm_op_cb		*roc = rwm_callback_get( op );
+
+	rc = rwm_op_dn_massage( op, rs, "compareDN", &roc->ros );
+	if ( rc != LDAP_SUCCESS ) {
+		op->o_bd->bd_info = (BackendInfo *)on->on_info;
+		send_ldap_error( op, rs, rc, "compareDN massage error" );
+		return -1;
+	}
+
+	/* if the attribute is an objectClass, try to remap its value */
+	if ( op->orc_ava->aa_desc == slap_schema.si_ad_objectClass
+			|| op->orc_ava->aa_desc == slap_schema.si_ad_structuralObjectClass )
+	{
+		rwm_map( &rwmap->rwm_oc, &op->orc_ava->aa_value,
+				&mapped_vals[0], RWM_MAP );
+		if ( BER_BVISNULL( &mapped_vals[0] ) || BER_BVISEMPTY( &mapped_vals[0] ) )
+		{
+			op->o_bd->bd_info = (BackendInfo *)on->on_info;
+			send_ldap_error( op, rs, LDAP_OTHER, "compare objectClass map error" );
+			return -1;
+
+		} else if ( mapped_vals[0].bv_val != op->orc_ava->aa_value.bv_val ) {
+			ber_dupbv_x( &op->orc_ava->aa_value, &mapped_vals[0],
+				op->o_tmpmemctx );
+		}
+
+	} else {
+		struct ldapmapping	*mapping = NULL;
+		AttributeDescription	*ad = op->orc_ava->aa_desc;
+
+		( void )rwm_mapping( &rwmap->rwm_at, &op->orc_ava->aa_desc->ad_cname,
+				&mapping, RWM_MAP );
+		if ( mapping == NULL ) {
+			if ( rwmap->rwm_at.drop_missing ) {
+				op->o_bd->bd_info = (BackendInfo *)on->on_info;
+				send_ldap_error( op, rs, LDAP_OTHER, "compare attributeType map error" );
+				return -1;
+			}
+
+		} else {
+			assert( mapping->m_dst_ad != NULL );
+			ad = mapping->m_dst_ad;
+		}
+
+		if ( op->orc_ava->aa_desc->ad_type->sat_syntax == slap_schema.si_syn_distinguishedName
+				|| ( mapping != NULL && mapping->m_dst_ad->ad_type->sat_syntax == slap_schema.si_syn_distinguishedName ) )
+		{
+			struct berval	*mapped_valsp[2];
+			
+			mapped_valsp[0] = &mapped_vals[0];
+			mapped_valsp[1] = &mapped_vals[1];
+
+			mapped_vals[0] = op->orc_ava->aa_value;
+
+			rc = rwm_dnattr_rewrite( op, rs, "compareAttrDN", NULL, mapped_valsp );
+
+			if ( rc != LDAP_SUCCESS ) {
+				op->o_bd->bd_info = (BackendInfo *)on->on_info;
+				send_ldap_error( op, rs, rc, "compareAttrDN massage error" );
+				return -1;
+			}
+
+			if ( mapped_vals[ 0 ].bv_val != op->orc_ava->aa_value.bv_val ) {
+				/* NOTE: if we get here, rwm_dnattr_rewrite()
+				 * already freed the old value, so now 
+				 * it's invalid */
+				ber_dupbv_x( &op->orc_ava->aa_value, &mapped_vals[0],
+					op->o_tmpmemctx );
+				ber_memfree_x( mapped_vals[ 0 ].bv_val, NULL );
+			}
+		}
+		op->orc_ava->aa_desc = ad;
+	}
+
+	op->o_callback = &roc->cb;
+
+	return SLAP_CB_CONTINUE;
+}
+
+static int
+rwm_op_delete( Operation *op, SlapReply *rs )
+{
+	slap_overinst		*on = (slap_overinst *) op->o_bd->bd_info;
+	int			rc;
+
+	rwm_op_cb		*roc = rwm_callback_get( op );
+
+	rc = rwm_op_dn_massage( op, rs, "deleteDN", &roc->ros );
+	if ( rc != LDAP_SUCCESS ) {
+		op->o_bd->bd_info = (BackendInfo *)on->on_info;
+		send_ldap_error( op, rs, rc, "deleteDN massage error" );
+		return -1;
+	}
+
+	op->o_callback = &roc->cb;
+
+	return SLAP_CB_CONTINUE;
+}
+
+static int
+rwm_op_modify( Operation *op, SlapReply *rs )
+{
+	slap_overinst		*on = (slap_overinst *) op->o_bd->bd_info;
+	struct ldaprwmap	*rwmap = 
+			(struct ldaprwmap *)on->on_bi.bi_private;
+
+	int			isupdate;
+	Modifications		**mlp;
+	int			rc;
+
+	rwm_op_cb		*roc = rwm_callback_get( op );
+
+	rc = rwm_op_dn_massage( op, rs, "modifyDN", &roc->ros );
+	if ( rc != LDAP_SUCCESS ) {
+		op->o_bd->bd_info = (BackendInfo *)on->on_info;
+		send_ldap_error( op, rs, rc, "modifyDN massage error" );
+		return -1;
+	}
+
+	isupdate = be_shadow_update( op );
+	for ( mlp = &op->orm_modlist; *mlp; ) {
+		int			is_oc = 0;
+		Modifications		*ml = *mlp;
+		struct ldapmapping	*mapping = NULL;
+
+		/* ml points to a temporary mod until needs duplication */
+		if ( ml->sml_desc == slap_schema.si_ad_objectClass 
+				|| ml->sml_desc == slap_schema.si_ad_structuralObjectClass )
+		{
+			is_oc = 1;
+
+		} else if ( !isupdate && !get_relax( op ) && ml->sml_desc->ad_type->sat_no_user_mod  )
+		{
+			ml = ch_malloc( sizeof( Modifications ) );
+			*ml = **mlp;
+			if ( (*mlp)->sml_values ) {
+				ber_bvarray_dup_x( &ml->sml_values, (*mlp)->sml_values, NULL );
+				if ( (*mlp)->sml_nvalues ) {
+					ber_bvarray_dup_x( &ml->sml_nvalues, (*mlp)->sml_nvalues, NULL );
+				}
+			}
+			*mlp = ml;
+			goto next_mod;
+
+		} else {
+			int			drop_missing;
+
+			drop_missing = rwm_mapping( &rwmap->rwm_at,
+					&ml->sml_desc->ad_cname,
+					&mapping, RWM_MAP );
+			if ( drop_missing || ( mapping != NULL && BER_BVISNULL( &mapping->m_dst ) ) )
+			{
+				goto skip_mod;
+			}
+		}
+
+		/* duplicate the modlist */
+		ml = ch_malloc( sizeof( Modifications ));
+		*ml = **mlp;
+		*mlp = ml;
+
+		if ( ml->sml_values != NULL ) {
+			int i, num;
+			struct berval *bva;
+
+			for ( num = 0; !BER_BVISNULL( &ml->sml_values[ num ] ); num++ )
+				/* count values */ ;
+
+			bva = ch_malloc( (num+1) * sizeof( struct berval ));
+			for (i=0; i<num; i++)
+				ber_dupbv( &bva[i], &ml->sml_values[i] );
+			BER_BVZERO( &bva[i] );
+			ml->sml_values = bva;
+
+			if ( ml->sml_nvalues ) {
+				bva = ch_malloc( (num+1) * sizeof( struct berval ));
+				for (i=0; i<num; i++)
+					ber_dupbv( &bva[i], &ml->sml_nvalues[i] );
+				BER_BVZERO( &bva[i] );
+				ml->sml_nvalues = bva;
+			}
+
+			if ( is_oc ) {
+				int	last, j;
+
+				last = num-1;
+
+				for ( j = 0; !BER_BVISNULL( &ml->sml_values[ j ] ); j++ ) {
+					struct ldapmapping	*oc_mapping = NULL;
+		
+					( void )rwm_mapping( &rwmap->rwm_oc, &ml->sml_values[ j ],
+							&oc_mapping, RWM_MAP );
+					if ( oc_mapping == NULL ) {
+						if ( rwmap->rwm_at.drop_missing ) {
+							/* FIXME: we allow to remove objectClasses as well;
+							 * if the resulting entry is inconsistent, that's
+							 * the relayed database's business...
+							 */
+							if ( last > j ) {
+								ch_free( ml->sml_values[ j ].bv_val );
+								ml->sml_values[ j ] = ml->sml_values[ last ];
+							}
+							BER_BVZERO( &ml->sml_values[ last ] );
+							last--;
+							j--;
+						}
+	
+					} else {
+						ch_free( ml->sml_values[ j ].bv_val );
+						ber_dupbv( &ml->sml_values[ j ], &oc_mapping->m_dst );
+					}
+				}
+
+			} else {
+				if ( ml->sml_desc->ad_type->sat_syntax == slap_schema.si_syn_distinguishedName
+						|| ( mapping != NULL && mapping->m_dst_ad->ad_type->sat_syntax == slap_schema.si_syn_distinguishedName ) )
+				{
+					rc = rwm_dnattr_rewrite( op, rs, "modifyAttrDN",
+							ml->sml_values,
+							ml->sml_nvalues ? &ml->sml_nvalues : NULL );
+
+				} else if ( ml->sml_desc == slap_schema.si_ad_ref ) {
+					rc = rwm_referral_rewrite( op, rs,
+							"referralAttrDN",
+							ml->sml_values,
+							ml->sml_nvalues ? &ml->sml_nvalues : NULL );
+					if ( rc != LDAP_SUCCESS ) {
+						goto cleanup_mod;
+					}
+				}
+
+				if ( rc != LDAP_SUCCESS ) {
+					goto cleanup_mod;
+				}
+			}
+		}
+
+next_mod:;
+		if ( mapping != NULL ) {
+			/* use new attribute description */
+			assert( mapping->m_dst_ad != NULL );
+			ml->sml_desc = mapping->m_dst_ad;
+		}
+
+		mlp = &ml->sml_next;
+		continue;
+
+skip_mod:;
+		*mlp = (*mlp)->sml_next;
+		continue;
+
+cleanup_mod:;
+		ml = *mlp;
+		*mlp = (*mlp)->sml_next;
+		slap_mod_free( &ml->sml_mod, 0 );
+		free( ml );
+	}
+
+	op->o_callback = &roc->cb;
+
+	return SLAP_CB_CONTINUE;
+}
+
+static int
+rwm_op_modrdn( Operation *op, SlapReply *rs )
+{
+	slap_overinst		*on = (slap_overinst *) op->o_bd->bd_info;
+	struct ldaprwmap	*rwmap = 
+			(struct ldaprwmap *)on->on_bi.bi_private;
+	
+	int			rc;
+	dncookie		dc;
+
+	rwm_op_cb		*roc = rwm_callback_get( op );
+
+	if ( op->orr_newSup ) {
+		struct berval	nnewSup = BER_BVNULL;
+		struct berval	newSup = BER_BVNULL;
+
+		/*
+		 * Rewrite the new superior, if defined and required
+	 	 */
+		dc.rwmap = rwmap;
+		dc.conn = op->o_conn;
+		dc.rs = rs;
+		dc.ctx = "newSuperiorDN";
+		newSup = *op->orr_newSup;
+		nnewSup = *op->orr_nnewSup;
+		rc = rwm_dn_massage_pretty_normalize( &dc, op->orr_newSup, &newSup, &nnewSup );
+		if ( rc != LDAP_SUCCESS ) {
+			op->o_bd->bd_info = (BackendInfo *)on->on_info;
+			send_ldap_error( op, rs, rc, "newSuperiorDN massage error" );
+			return -1;
+		}
+
+		if ( op->orr_newSup->bv_val != newSup.bv_val ) {
+			op->orr_newSup = op->o_tmpalloc( sizeof( struct berval ),
+				op->o_tmpmemctx );
+			op->orr_nnewSup = op->o_tmpalloc( sizeof( struct berval ),
+				op->o_tmpmemctx );
+			*op->orr_newSup = newSup;
+			*op->orr_nnewSup = nnewSup;
+		}
+	}
+
+	/*
+	 * Rewrite the newRDN, if needed
+ 	 */
+	{
+		struct berval	newrdn = BER_BVNULL;
+		struct berval	nnewrdn = BER_BVNULL;
+
+		dc.rwmap = rwmap;
+		dc.conn = op->o_conn;
+		dc.rs = rs;
+		dc.ctx = "newRDN";
+		newrdn = op->orr_newrdn;
+		nnewrdn = op->orr_nnewrdn;
+		rc = rwm_dn_massage_pretty_normalize( &dc, &op->orr_newrdn, &newrdn, &nnewrdn );
+		if ( rc != LDAP_SUCCESS ) {
+			op->o_bd->bd_info = (BackendInfo *)on->on_info;
+			send_ldap_error( op, rs, rc, "newRDN massage error" );
+			goto err;
+		}
+
+		if ( op->orr_newrdn.bv_val != newrdn.bv_val ) {
+			op->orr_newrdn = newrdn;
+			op->orr_nnewrdn = nnewrdn;
+		}
+	}
+
+	/*
+	 * Rewrite the dn, if needed
+ 	 */
+	rc = rwm_op_dn_massage( op, rs, "renameDN", &roc->ros );
+	if ( rc != LDAP_SUCCESS ) {
+		op->o_bd->bd_info = (BackendInfo *)on->on_info;
+		send_ldap_error( op, rs, rc, "renameDN massage error" );
+		goto err;
+	}
+
+	op->o_callback = &roc->cb;
+
+	rc = SLAP_CB_CONTINUE;
+
+	if ( 0 ) {
+err:;
+		if ( op->orr_newSup != roc->ros.orr_newSup ) {
+			ch_free( op->orr_newSup->bv_val );
+			ch_free( op->orr_nnewSup->bv_val );
+			op->o_tmpfree( op->orr_newSup, op->o_tmpmemctx );
+			op->o_tmpfree( op->orr_nnewSup, op->o_tmpmemctx );
+			op->orr_newSup = roc->ros.orr_newSup;
+			op->orr_nnewSup = roc->ros.orr_nnewSup;
+		}
+
+		if ( op->orr_newrdn.bv_val != roc->ros.orr_newrdn.bv_val ) {
+			ch_free( op->orr_newrdn.bv_val );
+			ch_free( op->orr_nnewrdn.bv_val );
+			op->orr_newrdn = roc->ros.orr_newrdn;
+			op->orr_nnewrdn = roc->ros.orr_nnewrdn;
+		}
+	}
+
+	return rc;
+}
+
+
+static int
+rwm_swap_attrs( Operation *op, SlapReply *rs )
+{
+	slap_callback	*cb = op->o_callback;
+	rwm_op_state *ros = cb->sc_private;
+
+	rs->sr_attrs = ros->ors_attrs;
+
+	/* other overlays might have touched op->ors_attrs, 
+	 * so we restore the original version here, otherwise
+	 * attribute-mapping might fail */
+	op->ors_attrs = ros->mapped_attrs; 
+	
+ 	return SLAP_CB_CONTINUE;
+}
+
+/*
+ * NOTE: this implementation of get/release entry is probably far from
+ * optimal.  The rationale consists in intercepting the request directed
+ * to the underlying database, in order to rewrite/remap the request,
+ * perform it using the modified data, duplicate the resulting entry
+ * and finally free it when release is called.
+ * This implies that subsequent overlays are not called, as the request
+ * is directly shunted to the underlying database.
+ */
+static int
+rwm_entry_release_rw( Operation *op, Entry *e, int rw )
+{
+	slap_overinst		*on = (slap_overinst *) op->o_bd->bd_info;
+
+	/* can't be ours */
+	if ( ((BackendInfo *)on->on_info->oi_orig)->bi_entry_get_rw == NULL ) {
+		return SLAP_CB_CONTINUE;
+	}
+
+	/* just free entry if (probably) ours */
+	if ( e->e_private == NULL && BER_BVISNULL( &e->e_bv ) ) {
+		entry_free( e );
+		return LDAP_SUCCESS;
+	}
+
+	return SLAP_CB_CONTINUE;
+}
+
+static int
+rwm_entry_get_rw( Operation *op, struct berval *ndn,
+	ObjectClass *oc, AttributeDescription *at, int rw, Entry **ep )
+{
+	slap_overinst		*on = (slap_overinst *) op->o_bd->bd_info;
+	int			rc;
+	BackendDB		db;
+	Operation		op2;
+	SlapReply		rs = { REP_SEARCH };
+
+	rwm_op_state		ros = { 0 };
+	struct berval		mndn = BER_BVNULL;
+
+	if ( ((BackendInfo *)on->on_info->oi_orig)->bi_entry_get_rw == NULL ) {
+		return SLAP_CB_CONTINUE;
+	}
+
+	/* massage DN */
+	op2.o_tag = LDAP_REQ_SEARCH;
+	op2 = *op;
+	op2.o_req_dn = *ndn;
+	op2.o_req_ndn = *ndn;
+	rc = rwm_op_dn_massage( &op2, &rs, "searchDN", &ros );
+	if ( rc != LDAP_SUCCESS ) {
+		return LDAP_OTHER;
+	}
+
+	mndn = BER_BVISNULL( &ros.r_ndn ) ? *ndn : ros.r_ndn;
+
+	/* map attribute & objectClass */
+	if ( at != NULL ) {
+	}
+
+	if ( oc != NULL ) {
+	}
+
+	/* fetch entry */
+	db = *op->o_bd;
+	op2.o_bd = &db;
+	op2.o_bd->bd_info = (BackendInfo *)on->on_info->oi_orig;
+	op2.ors_attrs = slap_anlist_all_attributes;
+	rc = op2.o_bd->bd_info->bi_entry_get_rw( &op2, &mndn, oc, at, rw, ep );
+	if ( rc == LDAP_SUCCESS && *ep != NULL ) {
+		/* we assume be_entry_release() needs to be called */
+		rs.sr_flags = REP_ENTRY_MUSTRELEASE;
+		rs.sr_entry = *ep;
+
+		/* duplicate & release */
+		op2.o_bd->bd_info = (BackendInfo *)on;
+		rc = rwm_send_entry( &op2, &rs );
+		RS_ASSERT( rs.sr_flags & REP_ENTRY_MUSTFLUSH );
+		if ( rc == SLAP_CB_CONTINUE ) {
+			*ep = rs.sr_entry;
+			rc = LDAP_SUCCESS;
+		} else {
+			assert( rc != LDAP_SUCCESS && rs.sr_entry == *ep );
+			*ep = NULL;
+			op2.o_bd->bd_info = (BackendInfo *)on->on_info;
+			be_entry_release_r( &op2, rs.sr_entry );
+			op2.o_bd->bd_info = (BackendInfo *)on;
+		}
+	}
+
+	if ( !BER_BVISNULL( &ros.r_ndn) && ros.r_ndn.bv_val != ndn->bv_val ) {
+		op->o_tmpfree( ros.r_ndn.bv_val, op->o_tmpmemctx );
+	}
+
+	return rc;
+}
+
+static int
+rwm_op_search( Operation *op, SlapReply *rs )
+{
+	slap_overinst		*on = (slap_overinst *) op->o_bd->bd_info;
+	struct ldaprwmap	*rwmap = 
+			(struct ldaprwmap *)on->on_bi.bi_private;
+
+	int			rc;
+	dncookie		dc;
+
+	struct berval		fstr = BER_BVNULL;
+	Filter			*f = NULL;
+
+	AttributeName		*an = NULL;
+
+	char			*text = NULL;
+
+	rwm_op_cb		*roc = rwm_callback_get( op );
+
+	rc = rewrite_session_var_set( rwmap->rwm_rw, op->o_conn,
+		"searchFilter", op->ors_filterstr.bv_val );
+	if ( rc == LDAP_SUCCESS )
+		rc = rwm_op_dn_massage( op, rs, "searchDN", &roc->ros );
+	if ( rc != LDAP_SUCCESS ) {
+		text = "searchDN massage error";
+		goto error_return;
+	}
+
+	/*
+	 * Rewrite the dn if needed
+	 */
+	dc.rwmap = rwmap;
+	dc.conn = op->o_conn;
+	dc.rs = rs;
+	dc.ctx = "searchFilterAttrDN";
+
+	rc = rwm_filter_map_rewrite( op, &dc, op->ors_filter, &fstr );
+	if ( rc != LDAP_SUCCESS ) {
+		text = "searchFilter/searchFilterAttrDN massage error";
+		goto error_return;
+	}
+
+	f = str2filter_x( op, fstr.bv_val );
+
+	if ( f == NULL ) {
+		text = "massaged filter parse error";
+		goto error_return;
+	}
+
+	op->ors_filter = f;
+	op->ors_filterstr = fstr;
+
+	rc = rwm_map_attrnames( op, &rwmap->rwm_at, &rwmap->rwm_oc,
+			op->ors_attrs, &an, RWM_MAP );
+	if ( rc != LDAP_SUCCESS ) {
+		text = "attribute list mapping error";
+		goto error_return;
+	}
+
+	op->ors_attrs = an;
+	/* store the mapped Attributes for later usage, in
+	 * the case that other overlays change op->ors_attrs */
+	roc->ros.mapped_attrs = an;
+	roc->cb.sc_response = rwm_swap_attrs;
+
+	op->o_callback = &roc->cb;
+
+	return SLAP_CB_CONTINUE;
+
+error_return:;
+	if ( an != NULL ) {
+		ch_free( an );
+	}
+
+	if ( f != NULL ) {
+		filter_free_x( op, f, 1 );
+	}
+
+	if ( !BER_BVISNULL( &fstr ) ) {
+		op->o_tmpfree( fstr.bv_val, op->o_tmpmemctx );
+	}
+
+	rwm_op_rollback( op, rs, &roc->ros );
+	op->oq_search = roc->ros.oq_search;
+	op->o_tmpfree( roc, op->o_tmpmemctx );
+
+	op->o_bd->bd_info = (BackendInfo *)on->on_info;
+	send_ldap_error( op, rs, rc, text );
+
+	return -1;
+
+}
+
+static int
+rwm_exop_passwd( Operation *op, SlapReply *rs )
+{
+	slap_overinst		*on = (slap_overinst *) op->o_bd->bd_info;
+	int			rc;
+	rwm_op_cb *roc;
+
+	struct berval	id = BER_BVNULL,
+			pwold = BER_BVNULL,
+			pwnew = BER_BVNULL;
+	BerElement *ber = NULL;
+
+	if ( !BER_BVISNULL( &op->o_req_ndn ) ) {
+		return LDAP_SUCCESS;
+	}
+
+	if ( !SLAP_ISGLOBALOVERLAY( op->o_bd ) ) {
+		rs->sr_err = LDAP_OTHER;
+		return rs->sr_err;
+	}
+
+	rs->sr_err = slap_passwd_parse( op->ore_reqdata, &id,
+		&pwold, &pwnew, &rs->sr_text );
+	if ( rs->sr_err != LDAP_SUCCESS ) {
+		return rs->sr_err;
+	}
+
+	if ( !BER_BVISNULL( &id ) ) {
+		char idNul = id.bv_val[id.bv_len];
+		id.bv_val[id.bv_len] = '\0';
+		rs->sr_err = dnPrettyNormal( NULL, &id, &op->o_req_dn,
+				&op->o_req_ndn, op->o_tmpmemctx );
+		id.bv_val[id.bv_len] = idNul;
+		if ( rs->sr_err != LDAP_SUCCESS ) {
+			rs->sr_text = "Invalid DN";
+			return rs->sr_err;
+		}
+
+	} else {
+		ber_dupbv_x( &op->o_req_dn, &op->o_dn, op->o_tmpmemctx );
+		ber_dupbv_x( &op->o_req_ndn, &op->o_ndn, op->o_tmpmemctx );
+	}
+
+	roc = rwm_callback_get( op );
+
+	rc = rwm_op_dn_massage( op, rs, "extendedDN", &roc->ros );
+	if ( rc != LDAP_SUCCESS ) {
+		op->o_bd->bd_info = (BackendInfo *)on->on_info;
+		send_ldap_error( op, rs, rc, "extendedDN massage error" );
+		return -1;
+	}
+
+	ber = ber_alloc_t( LBER_USE_DER );
+	if ( !ber ) {
+		rs->sr_err = LDAP_OTHER;
+		rs->sr_text = "No memory";
+		return rs->sr_err;
+	}
+	ber_printf( ber, "{" );
+	if ( !BER_BVISNULL( &id )) {
+		ber_printf( ber, "tO", LDAP_TAG_EXOP_MODIFY_PASSWD_ID, 
+			&op->o_req_dn );
+	}
+	if ( !BER_BVISNULL( &pwold )) {
+		ber_printf( ber, "tO", LDAP_TAG_EXOP_MODIFY_PASSWD_OLD, &pwold );
+	}
+	if ( !BER_BVISNULL( &pwnew )) {
+		ber_printf( ber, "tO", LDAP_TAG_EXOP_MODIFY_PASSWD_NEW, &pwnew );
+	}
+	ber_printf( ber, "N}" );
+	ber_flatten( ber, &op->ore_reqdata );
+	ber_free( ber, 1 );
+
+	op->o_callback = &roc->cb;
+
+	return SLAP_CB_CONTINUE;
+}
+
+static struct exop {
+	struct berval	oid;
+	BI_op_extended	*extended;
+} exop_table[] = {
+	{ BER_BVC(LDAP_EXOP_MODIFY_PASSWD),	rwm_exop_passwd },
+	{ BER_BVNULL, NULL }
+};
+
+static int
+rwm_extended( Operation *op, SlapReply *rs )
+{
+	slap_overinst		*on = (slap_overinst *) op->o_bd->bd_info;
+	int			rc;
+	rwm_op_cb *roc;
+
+	int	i;
+
+	for ( i = 0; exop_table[i].extended != NULL; i++ ) {
+		if ( bvmatch( &exop_table[i].oid, &op->oq_extended.rs_reqoid ) )
+		{
+			rc = exop_table[i].extended( op, rs );
+			switch ( rc ) {
+			case LDAP_SUCCESS:
+				break;
+
+			case SLAP_CB_CONTINUE:
+			case SLAPD_ABANDON:
+				return rc;
+
+			default:
+				send_ldap_result( op, rs );
+				return rc;
+			}
+			break;
+		}
+	}
+
+	roc = rwm_callback_get( op );
+
+	rc = rwm_op_dn_massage( op, rs, "extendedDN", &roc->ros );
+	if ( rc != LDAP_SUCCESS ) {
+		op->o_bd->bd_info = (BackendInfo *)on->on_info;
+		send_ldap_error( op, rs, rc, "extendedDN massage error" );
+		return -1;
+	}
+
+	/* TODO: rewrite/map extended data ? ... */
+	op->o_callback = &roc->cb;
+
+	return SLAP_CB_CONTINUE;
+}
+
+static void
+rwm_matched( Operation *op, SlapReply *rs )
+{
+	slap_overinst		*on = (slap_overinst *) op->o_bd->bd_info;
+	struct ldaprwmap	*rwmap = 
+			(struct ldaprwmap *)on->on_bi.bi_private;
+
+	struct berval		dn, mdn;
+	dncookie		dc;
+	int			rc;
+
+	if ( rs->sr_matched == NULL ) {
+		return;
+	}
+
+	dc.rwmap = rwmap;
+	dc.conn = op->o_conn;
+	dc.rs = rs;
+	dc.ctx = "matchedDN";
+	ber_str2bv( rs->sr_matched, 0, 0, &dn );
+	mdn = dn;
+	rc = rwm_dn_massage_pretty( &dc, &dn, &mdn );
+	if ( rc != LDAP_SUCCESS ) {
+		rs->sr_err = rc;
+		rs->sr_text = "Rewrite error";
+
+	} else if ( mdn.bv_val != dn.bv_val ) {
+		if ( rs->sr_flags & REP_MATCHED_MUSTBEFREED ) {
+			ch_free( (void *)rs->sr_matched );
+
+		} else {
+			rs->sr_flags |= REP_MATCHED_MUSTBEFREED;
+		}
+		rs->sr_matched = mdn.bv_val;
+	}
+}
+
+static int
+rwm_attrs( Operation *op, SlapReply *rs, Attribute** a_first, int stripEntryDN )
+{
+	slap_overinst		*on = (slap_overinst *) op->o_bd->bd_info;
+	struct ldaprwmap	*rwmap = 
+			(struct ldaprwmap *)on->on_bi.bi_private;
+
+	dncookie		dc;
+	int			rc;
+	Attribute		**ap;
+	int			isupdate;
+	int			check_duplicate_attrs = 0;
+
+	/*
+	 * Rewrite the dn attrs, if needed
+	 */
+	dc.rwmap = rwmap;
+	dc.conn = op->o_conn;
+	dc.rs = NULL; 
+
+	/* FIXME: the entries are in the remote mapping form;
+	 * so we need to select those attributes we are willing
+	 * to return, and remap them accordingly */
+
+	/* FIXME: in principle, one could map an attribute
+	 * on top of another, which already exists.
+	 * As such, in the end there might exist more than
+	 * one instance of an attribute.
+	 * We should at least check if this occurs, and issue
+	 * an error (because multiple instances of attrs in 
+	 * response are not valid), or merge the values (what
+	 * about duplicate values?) */
+	isupdate = be_shadow_update( op );
+	for ( ap = a_first; *ap; ) {
+		struct ldapmapping	*mapping = NULL;
+		int			drop_missing;
+		int			last = -1;
+		Attribute		*a;
+
+		if ( ( rwmap->rwm_flags & RWM_F_DROP_UNREQUESTED_ATTRS ) &&
+				op->ors_attrs != NULL && 
+				!SLAP_USERATTRS( rs->sr_attr_flags ) &&
+				!ad_inlist( (*ap)->a_desc, op->ors_attrs ) )
+		{
+			goto cleanup_attr;
+		}
+
+		drop_missing = rwm_mapping( &rwmap->rwm_at,
+				&(*ap)->a_desc->ad_cname, &mapping, RWM_REMAP );
+		if ( drop_missing || ( mapping != NULL && BER_BVISEMPTY( &mapping->m_dst ) ) )
+		{
+			goto cleanup_attr;
+		}
+		if ( mapping != NULL ) {
+			assert( mapping->m_dst_ad != NULL );
+
+			/* try to normalize mapped Attributes if the original 
+			 * AttributeType was not normalized */
+			if ( (!(*ap)->a_desc->ad_type->sat_equality || 
+				!(*ap)->a_desc->ad_type->sat_equality->smr_normalize) &&
+				mapping->m_dst_ad->ad_type->sat_equality &&
+				mapping->m_dst_ad->ad_type->sat_equality->smr_normalize )
+			{
+				if ((rwmap->rwm_flags & RWM_F_NORMALIZE_MAPPED_ATTRS))
+				{
+					int i = 0;
+
+					last = (*ap)->a_numvals;
+					if ( last )
+					{
+						(*ap)->a_nvals = ch_malloc( (last+1) * sizeof(struct berval) );
+
+						for ( i = 0; !BER_BVISNULL( &(*ap)->a_vals[i]); i++ ) {
+							int		rc;
+							/*
+							 * check that each value is valid per syntax
+							 * and pretty if appropriate
+							 */
+							rc = mapping->m_dst_ad->ad_type->sat_equality->smr_normalize(
+								SLAP_MR_VALUE_OF_ATTRIBUTE_SYNTAX,
+								mapping->m_dst_ad->ad_type->sat_syntax,
+								mapping->m_dst_ad->ad_type->sat_equality,
+								&(*ap)->a_vals[i], &(*ap)->a_nvals[i],
+								NULL );
+
+							if ( rc != LDAP_SUCCESS ) {
+								/* FIXME: this is wrong, putting a non-normalized value
+								 * into nvals. But when a proxy sends us bogus data,
+								 * we still need to give it to the client, even if it
+								 * violates the syntax. I.e., we don't want to silently
+								 * drop things and trigger an apparent data loss.
+								 */
+								ber_dupbv( &(*ap)->a_nvals[i], &(*ap)->a_vals[i] );
+							}
+						}
+						BER_BVZERO( &(*ap)->a_nvals[i] );
+					}
+
+				} else {
+					assert( (*ap)->a_nvals == (*ap)->a_vals );
+					(*ap)->a_nvals = NULL;
+					ber_bvarray_dup_x( &(*ap)->a_nvals, (*ap)->a_vals, NULL );
+				}
+			}
+
+			/* rewrite the attribute description */
+			(*ap)->a_desc = mapping->m_dst_ad;
+
+			/* will need to check for duplicate attrs */
+			check_duplicate_attrs++;
+		}
+
+		if ( (*ap)->a_desc == slap_schema.si_ad_entryDN ) {
+			if ( stripEntryDN ) {
+				/* will be generated by frontend */
+				goto cleanup_attr;
+			}
+			
+		} else if ( !isupdate
+			&& !get_relax( op )
+			&& (*ap)->a_desc->ad_type->sat_no_user_mod 
+			&& (*ap)->a_desc->ad_type != slap_schema.si_at_undefined )
+		{
+			goto next_attr;
+		}
+
+		if ( last == -1 ) { /* not yet counted */ 
+			last = (*ap)->a_numvals;
+		}
+
+		if ( last == 0 ) {
+			/* empty? leave it in place because of attrsonly and vlv */
+			goto next_attr;
+		}
+		last--;
+
+		if ( (*ap)->a_desc == slap_schema.si_ad_objectClass
+				|| (*ap)->a_desc == slap_schema.si_ad_structuralObjectClass )
+		{
+			struct berval	*bv;
+			
+			for ( bv = (*ap)->a_vals; !BER_BVISNULL( bv ); bv++ ) {
+				struct berval	mapped;
+
+				rwm_map( &rwmap->rwm_oc, &bv[0], &mapped, RWM_REMAP );
+				if ( BER_BVISNULL( &mapped ) || BER_BVISEMPTY( &mapped ) ) {
+remove_oc:;
+					ch_free( bv[0].bv_val );
+					BER_BVZERO( &bv[0] );
+					if ( &(*ap)->a_vals[last] > &bv[0] ) {
+						bv[0] = (*ap)->a_vals[last];
+						BER_BVZERO( &(*ap)->a_vals[last] );
+					}
+					last--;
+					bv--;
+
+				} else if ( mapped.bv_val != bv[0].bv_val
+					&& ber_bvstrcasecmp( &mapped, &bv[0] ) != 0 )
+				{
+					int	i;
+
+					for ( i = 0; !BER_BVISNULL( &(*ap)->a_vals[ i ] ); i++ ) {
+						if ( &(*ap)->a_vals[ i ] == bv ) {
+							continue;
+						}
+
+						if ( ber_bvstrcasecmp( &mapped, &(*ap)->a_vals[ i ] ) == 0 ) {
+							break;
+						}
+					}
+
+					if ( !BER_BVISNULL( &(*ap)->a_vals[ i ] ) ) {
+						goto remove_oc;
+					}
+
+					/*
+					 * FIXME: after LBER_FREEing
+					 * the value is replaced by
+					 * ch_alloc'ed memory
+					 */
+					ber_bvreplace( &bv[0], &mapped );
+
+					/* FIXME: will need to check
+					 * if the structuralObjectClass
+					 * changed */
+				}
+			}
+
+		/*
+		 * It is necessary to try to rewrite attributes with
+		 * dn syntax because they might be used in ACLs as
+		 * members of groups; since ACLs are applied to the
+		 * rewritten stuff, no dn-based subject clause could
+		 * be used at the ldap backend side (see
+		 * http://www.OpenLDAP.org/faq/data/cache/452.html)
+		 * The problem can be overcome by moving the dn-based
+		 * ACLs to the target directory server, and letting
+		 * everything pass thru the ldap backend. */
+		/* FIXME: handle distinguishedName-like syntaxes, like
+		 * nameAndOptionalUID */
+		} else if ( (*ap)->a_desc->ad_type->sat_syntax == slap_schema.si_syn_distinguishedName
+				|| ( mapping != NULL && mapping->m_src_ad->ad_type->sat_syntax == slap_schema.si_syn_distinguishedName ) )
+		{
+			dc.ctx = "searchAttrDN";
+			rc = rwm_dnattr_result_rewrite( &dc, (*ap)->a_vals, (*ap)->a_nvals );
+			if ( rc != LDAP_SUCCESS ) {
+				goto cleanup_attr;
+			}
+
+		} else if ( (*ap)->a_desc == slap_schema.si_ad_ref ) {
+			dc.ctx = "searchAttrDN";
+			rc = rwm_referral_result_rewrite( &dc, (*ap)->a_vals );
+			if ( rc != LDAP_SUCCESS ) {
+				goto cleanup_attr;
+			}
+		}
+
+
+next_attr:;
+		ap = &(*ap)->a_next;
+		continue;
+
+cleanup_attr:;
+		a = *ap;
+		*ap = (*ap)->a_next;
+
+		attr_free( a );
+	}
+
+	/* only check if some mapping occurred */
+	if ( check_duplicate_attrs ) {
+		for ( ap = a_first; *ap != NULL; ap = &(*ap)->a_next ) {
+			Attribute	**tap;
+
+			for ( tap = &(*ap)->a_next; *tap != NULL; ) {
+				if ( (*tap)->a_desc == (*ap)->a_desc ) {
+					Entry		e = { 0 };
+					Modification	mod = { 0 };
+					const char	*text = NULL;
+					char		textbuf[ SLAP_TEXT_BUFLEN ];
+					Attribute	*next = (*tap)->a_next;
+
+					BER_BVSTR( &e.e_name, "" );
+					BER_BVSTR( &e.e_nname, "" );
+					e.e_attrs = *ap;
+					mod.sm_op = LDAP_MOD_ADD;
+					mod.sm_desc = (*ap)->a_desc;
+					mod.sm_type = mod.sm_desc->ad_cname;
+					mod.sm_numvals = (*tap)->a_numvals;
+					mod.sm_values = (*tap)->a_vals;
+					if ( (*tap)->a_nvals != (*tap)->a_vals ) {
+						mod.sm_nvalues = (*tap)->a_nvals;
+					}
+
+					(void)modify_add_values( &e, &mod,
+						/* permissive */ 1,
+						&text, textbuf, sizeof( textbuf ) );
+
+					/* should not insert new attrs! */
+					assert( e.e_attrs == *ap );
+
+					attr_free( *tap );
+					*tap = next;
+
+				} else {
+					tap = &(*tap)->a_next;
+				}
+			}
+		}
+	}
+
+	return 0;
+}
+
+/* Should return SLAP_CB_CONTINUE or failure, never LDAP_SUCCESS. */
+static int
+rwm_send_entry( Operation *op, SlapReply *rs )
+{
+	slap_overinst		*on = (slap_overinst *) op->o_bd->bd_info;
+	struct ldaprwmap	*rwmap = 
+			(struct ldaprwmap *)on->on_bi.bi_private;
+
+	Entry			*e = NULL;
+	struct berval		dn = BER_BVNULL,
+				ndn = BER_BVNULL;
+	dncookie		dc;
+	int			rc;
+
+	assert( rs->sr_entry != NULL );
+
+	/*
+	 * Rewrite the dn of the result, if needed
+	 */
+	dc.rwmap = rwmap;
+	dc.conn = op->o_conn;
+	dc.rs = NULL; 
+	dc.ctx = "searchEntryDN";
+
+	e = rs->sr_entry;
+	if ( !( rs->sr_flags & REP_ENTRY_MODIFIABLE ) ) {
+		/* FIXME: all we need to duplicate are:
+		 * - dn
+		 * - ndn
+		 * - attributes that are requested
+		 * - no values if attrsonly is set
+		 */
+		e = entry_dup( e );
+		if ( e == NULL ) {
+			rc = LDAP_NO_MEMORY;
+			goto fail;
+		}
+	} else if ( rs->sr_flags & REP_ENTRY_MUSTRELEASE ) {
+		/* ITS#6423: REP_ENTRY_MUSTRELEASE incompatible
+		 * with REP_ENTRY_MODIFIABLE */
+		RS_ASSERT( 0 );
+		rc = 1;
+		goto fail;
+	}
+
+	/*
+	 * Note: this may fail if the target host(s) schema differs
+	 * from the one known to the meta, and a DN with unknown
+	 * attributes is returned.
+	 */
+	dn = e->e_name;
+	ndn = e->e_nname;
+	rc = rwm_dn_massage_pretty_normalize( &dc, &e->e_name, &dn, &ndn );
+	if ( rc != LDAP_SUCCESS ) {
+		rc = 1;
+		goto fail;
+	}
+
+	if ( e->e_name.bv_val != dn.bv_val ) {
+		ch_free( e->e_name.bv_val );
+		ch_free( e->e_nname.bv_val );
+
+		e->e_name = dn;
+		e->e_nname = ndn;
+	}
+
+	/* TODO: map entry attribute types, objectclasses 
+	 * and dn-valued attribute values */
+
+	/* FIXME: the entries are in the remote mapping form;
+	 * so we need to select those attributes we are willing
+	 * to return, and remap them accordingly */
+	(void)rwm_attrs( op, rs, &e->e_attrs, 1 );
+
+	if ( e != rs->sr_entry ) {
+		/* Reimplementing rs_replace_entry(), I suppose to
+		 * bypass our own dubious rwm_entry_release_rw() */
+		if ( rs->sr_flags & REP_ENTRY_MUSTRELEASE ) {
+			rs->sr_flags ^= REP_ENTRY_MUSTRELEASE;
+			op->o_bd->bd_info = (BackendInfo *)on->on_info;
+			be_entry_release_r( op, rs->sr_entry );
+			op->o_bd->bd_info = (BackendInfo *)on;
+		} else if ( rs->sr_flags & REP_ENTRY_MUSTBEFREED ) {
+			entry_free( rs->sr_entry );
+		}
+		rs->sr_entry = e;
+		rs->sr_flags |= REP_ENTRY_MODIFIABLE | REP_ENTRY_MUSTBEFREED;
+	}
+
+	return SLAP_CB_CONTINUE;
+
+fail:;
+	if ( e != NULL && e != rs->sr_entry ) {
+		if ( e->e_name.bv_val == dn.bv_val ) {
+			BER_BVZERO( &e->e_name );
+		}
+
+		if ( e->e_nname.bv_val == ndn.bv_val ) {
+			BER_BVZERO( &e->e_nname );
+		}
+
+		entry_free( e );
+	}
+
+	if ( !BER_BVISNULL( &dn ) ) {
+		ch_free( dn.bv_val );
+	}
+
+	if ( !BER_BVISNULL( &ndn ) ) {
+		ch_free( ndn.bv_val );
+	}
+
+	return rc;
+}
+
+static int
+rwm_operational( Operation *op, SlapReply *rs )
+{
+	/* FIXME: the entries are in the remote mapping form;
+	 * so we need to select those attributes we are willing
+	 * to return, and remap them accordingly */
+	if ( rs->sr_operational_attrs ) {
+		rwm_attrs( op, rs, &rs->sr_operational_attrs, 1 );
+	}
+
+	return SLAP_CB_CONTINUE;
+}
+
+#if 0
+/* don't use this; it cannot be reverted, and leaves op->o_req_dn
+ * rewritten for subsequent operations; fine for plain suffixmassage,
+ * but destroys everything else */
+static int
+rwm_chk_referrals( Operation *op, SlapReply *rs )
+{
+	slap_overinst		*on = (slap_overinst *) op->o_bd->bd_info;
+	int			rc;
+
+	rc = rwm_op_dn_massage( op, rs, "referralCheckDN" );
+	if ( rc != LDAP_SUCCESS ) {
+		op->o_bd->bd_info = (BackendInfo *)on->on_info;
+		send_ldap_error( op, rs, rc, "referralCheckDN massage error" );
+		return -1;
+	}
+
+	return SLAP_CB_CONTINUE;
+}
+#endif
+
+static int
+rwm_rw_config(
+	BackendDB	*be,
+	const char	*fname,
+	int		lineno,
+	int		argc,
+	char		**argv )
+{
+	slap_overinst		*on = (slap_overinst *) be->bd_info;
+	struct ldaprwmap	*rwmap = 
+			(struct ldaprwmap *)on->on_bi.bi_private;
+
+	return rewrite_parse( rwmap->rwm_rw,
+				fname, lineno, argc, argv );
+
+	return 0;
+}
+
+static int
+rwm_suffixmassage_config(
+	BackendDB	*be,
+	const char	*fname,
+	int		lineno,
+	int		argc,
+	char		**argv )
+{
+	slap_overinst		*on = (slap_overinst *) be->bd_info;
+	struct ldaprwmap	*rwmap = 
+			(struct ldaprwmap *)on->on_bi.bi_private;
+
+	struct berval		bvnc, nvnc, pvnc, brnc, nrnc, prnc;
+	int			massaged;
+	int			rc;
+		
+	/*
+	 * syntax:
+	 * 
+	 * 	suffixmassage [<suffix>] <massaged suffix>
+	 *
+	 * the [<suffix>] field must be defined as a valid suffix
+	 * for the current database;
+	 * the <massaged suffix> shouldn't have already been
+	 * defined as a valid suffix for the current server
+	 */
+	if ( argc == 2 ) {
+		if ( be->be_suffix == NULL ) {
+ 			Debug( LDAP_DEBUG_ANY, "%s: line %d: "
+				       " \"suffixMassage [<suffix>]"
+				       " <massaged suffix>\" without "
+				       "<suffix> part requires database "
+				       "suffix be defined first.\n",
+				fname, lineno, 0 );
+			return 1;
+		}
+		bvnc = be->be_suffix[ 0 ];
+		massaged = 1;
+
+	} else if ( argc == 3 ) {
+		ber_str2bv( argv[ 1 ], 0, 0, &bvnc );
+		massaged = 2;
+
+	} else  {
+ 		Debug( LDAP_DEBUG_ANY, "%s: line %d: syntax is"
+			       " \"suffixMassage [<suffix>]"
+			       " <massaged suffix>\"\n",
+			fname, lineno, 0 );
+		return 1;
+	}
+
+	if ( dnPrettyNormal( NULL, &bvnc, &pvnc, &nvnc, NULL ) != LDAP_SUCCESS ) {
+		Debug( LDAP_DEBUG_ANY, "%s: line %d: suffix DN %s is invalid\n",
+			fname, lineno, bvnc.bv_val );
+		return 1;
+	}
+
+	ber_str2bv( argv[ massaged ], 0, 0, &brnc );
+	if ( dnPrettyNormal( NULL, &brnc, &prnc, &nrnc, NULL ) != LDAP_SUCCESS ) {
+		Debug( LDAP_DEBUG_ANY, "%s: line %d: suffix DN %s is invalid\n",
+				fname, lineno, brnc.bv_val );
+		free( nvnc.bv_val );
+		free( pvnc.bv_val );
+		return 1;
+	}
+
+	/*
+	 * The suffix massaging is emulated 
+	 * by means of the rewrite capabilities
+	 */
+ 	rc = rwm_suffix_massage_config( rwmap->rwm_rw,
+			&pvnc, &nvnc, &prnc, &nrnc );
+	free( nvnc.bv_val );
+	free( pvnc.bv_val );
+	free( nrnc.bv_val );
+	free( prnc.bv_val );
+
+	return rc;
+}
+
+static int
+rwm_m_config(
+	BackendDB	*be,
+	const char	*fname,
+	int		lineno,
+	int		argc,
+	char		**argv )
+{
+	slap_overinst		*on = (slap_overinst *) be->bd_info;
+	struct ldaprwmap	*rwmap = 
+			(struct ldaprwmap *)on->on_bi.bi_private;
+
+	/* objectclass/attribute mapping */
+	return rwm_map_config( &rwmap->rwm_oc,
+			&rwmap->rwm_at,
+			fname, lineno, argc, argv );
+}
+
+static int
+rwm_response( Operation *op, SlapReply *rs )
+{
+	slap_overinst		*on = (slap_overinst *)op->o_bd->bd_info;
+	struct ldaprwmap	*rwmap = 
+			(struct ldaprwmap *)on->on_bi.bi_private;
+
+	int		rc;
+
+	if ( op->o_tag == LDAP_REQ_SEARCH && rs->sr_type == REP_SEARCH ) {
+		return rwm_send_entry( op, rs );
+	}
+
+	switch( op->o_tag ) {
+	case LDAP_REQ_SEARCH:
+	case LDAP_REQ_BIND:
+	case LDAP_REQ_ADD:
+	case LDAP_REQ_DELETE:
+	case LDAP_REQ_MODRDN:
+	case LDAP_REQ_MODIFY:
+	case LDAP_REQ_COMPARE:
+	case LDAP_REQ_EXTENDED:
+		if ( rs->sr_ref ) {
+			dncookie		dc;
+
+			/*
+			 * Rewrite the dn of the referrals, if needed
+			 */
+			dc.rwmap = rwmap;
+			dc.conn = op->o_conn;
+			dc.rs = NULL; 
+			dc.ctx = "referralDN";
+			rc = rwm_referral_result_rewrite( &dc, rs->sr_ref );
+			/* FIXME: impossible, so far */
+			if ( rc != LDAP_SUCCESS ) {
+				rs->sr_err = rc;
+				break;
+			}
+		}
+
+		rwm_matched( op, rs );
+		break;
+	}
+
+	return SLAP_CB_CONTINUE;
+}
+
+static int
+rwm_db_config(
+	BackendDB	*be,
+	const char	*fname,
+	int		lineno,
+	int		argc,
+	char		**argv )
+{
+	slap_overinst		*on = (slap_overinst *) be->bd_info;
+	struct ldaprwmap	*rwmap = 
+			(struct ldaprwmap *)on->on_bi.bi_private;
+
+	int		rc = 0;
+	char		*argv0 = NULL;
+
+	if ( strncasecmp( argv[ 0 ], "rwm-", STRLENOF( "rwm-" ) ) == 0 ) {
+		argv0 = argv[ 0 ];
+		argv[ 0 ] = &argv0[ STRLENOF( "rwm-" ) ];
+	}
+
+	if ( strncasecmp( argv[0], "rewrite", STRLENOF("rewrite") ) == 0 ) {
+		rc = rwm_rw_config( be, fname, lineno, argc, argv );
+
+	} else if ( strcasecmp( argv[0], "map" ) == 0 ) {
+		rc = rwm_m_config( be, fname, lineno, argc, argv );
+
+	} else if ( strcasecmp( argv[0], "suffixmassage" ) == 0 ) {
+		rc = rwm_suffixmassage_config( be, fname, lineno, argc, argv );
+
+	} else if ( strcasecmp( argv[0], "t-f-support" ) == 0 ) {
+		if ( argc != 2 ) {
+			Debug( LDAP_DEBUG_ANY,
+		"%s: line %d: \"t-f-support {no|yes|discover}\" needs 1 argument.\n",
+					fname, lineno, 0 );
+			return( 1 );
+		}
+
+		if ( strcasecmp( argv[ 1 ], "no" ) == 0 ) {
+			rwmap->rwm_flags &= ~(RWM_F_SUPPORT_T_F_MASK2);
+
+		} else if ( strcasecmp( argv[ 1 ], "yes" ) == 0 ) {
+			rwmap->rwm_flags |= RWM_F_SUPPORT_T_F;
+
+		/* TODO: not implemented yet */
+		} else if ( strcasecmp( argv[ 1 ], "discover" ) == 0 ) {
+			Debug( LDAP_DEBUG_ANY,
+		"%s: line %d: \"discover\" not supported yet "
+		"in \"t-f-support {no|yes|discover}\".\n",
+					fname, lineno, 0 );
+			return( 1 );
+#if 0
+			rwmap->rwm_flags |= RWM_F_SUPPORT_T_F_DISCOVER;
+#endif
+
+		} else {
+			Debug( LDAP_DEBUG_ANY,
+	"%s: line %d: unknown value \"%s\" for \"t-f-support {no|yes|discover}\".\n",
+				fname, lineno, argv[ 1 ] );
+			return 1;
+		}
+
+	} else if ( strcasecmp( argv[0], "normalize-mapped-attrs" ) ==  0 ) {
+		if ( argc !=2 ) { 
+			Debug( LDAP_DEBUG_ANY,
+		"%s: line %d: \"normalize-mapped-attrs {no|yes}\" needs 1 argument.\n",
+					fname, lineno, 0 );
+			return( 1 );
+		}
+
+		if ( strcasecmp( argv[ 1 ], "no" ) == 0 ) {
+			rwmap->rwm_flags &= ~(RWM_F_NORMALIZE_MAPPED_ATTRS);
+
+		} else if ( strcasecmp( argv[ 1 ], "yes" ) == 0 ) {
+			rwmap->rwm_flags |= RWM_F_NORMALIZE_MAPPED_ATTRS;
+		}
+
+	} else {
+		rc = SLAP_CONF_UNKNOWN;
+	}
+
+	if ( argv0 ) {
+		argv[ 0 ] = argv0;
+	}
+
+	return rc;
+}
+
+/*
+ * dynamic configuration...
+ */
+
+enum {
+	/* rewrite */
+	RWM_CF_REWRITE = 1,
+
+	/* map */
+	RWM_CF_MAP,
+	RWM_CF_T_F_SUPPORT,
+	RWM_CF_NORMALIZE_MAPPED,
+	RWM_CF_DROP_UNREQUESTED,
+
+	RWM_CF_LAST
+};
+
+static slap_verbmasks t_f_mode[] = {
+	{ BER_BVC( "true" ),		RWM_F_SUPPORT_T_F },
+	{ BER_BVC( "yes" ),		RWM_F_SUPPORT_T_F },
+	{ BER_BVC( "discover" ),	RWM_F_SUPPORT_T_F_DISCOVER },
+	{ BER_BVC( "false" ),		RWM_F_NONE },
+	{ BER_BVC( "no" ),		RWM_F_NONE },
+	{ BER_BVNULL,			0 }
+};
+
+static ConfigDriver rwm_cf_gen;
+
+static ConfigTable rwmcfg[] = {
+	{ "rwm-rewrite", "rewrite",
+		2, 0, STRLENOF("rwm-rewrite"),
+		ARG_MAGIC|RWM_CF_REWRITE, rwm_cf_gen,
+		"( OLcfgOvAt:16.1 NAME 'olcRwmRewrite' "
+			"DESC 'Rewrites strings' "
+			"EQUALITY caseIgnoreMatch "
+			"SYNTAX OMsDirectoryString "
+			"X-ORDERED 'VALUES' )",
+		NULL, NULL },
+
+	{ "rwm-suffixmassage", "[virtual]> <real",
+		2, 3, 0, ARG_MAGIC|RWM_CF_REWRITE, rwm_cf_gen,
+		NULL, NULL, NULL },
+		
+	{ "rwm-t-f-support", "true|false|discover",
+		2, 2, 0, ARG_MAGIC|RWM_CF_T_F_SUPPORT, rwm_cf_gen,
+		"( OLcfgOvAt:16.2 NAME 'olcRwmTFSupport' "
+			"DESC 'Absolute filters support' "
+			"SYNTAX OMsDirectoryString "
+			"SINGLE-VALUE )",
+		NULL, NULL },
+
+	{ "rwm-map", "{objectClass|attribute}",
+		2, 4, 0, ARG_MAGIC|RWM_CF_MAP, rwm_cf_gen,
+		"( OLcfgOvAt:16.3 NAME 'olcRwmMap' "
+			"DESC 'maps attributes/objectClasses' "
+			"EQUALITY caseIgnoreMatch "
+			"SYNTAX OMsDirectoryString "
+			"X-ORDERED 'VALUES' )",
+		NULL, NULL },
+
+	{ "rwm-normalize-mapped-attrs", "true|false",
+		2, 2, 0, ARG_MAGIC|ARG_ON_OFF|RWM_CF_NORMALIZE_MAPPED, rwm_cf_gen,
+		"( OLcfgOvAt:16.4 NAME 'olcRwmNormalizeMapped' "
+			"DESC 'Normalize mapped attributes/objectClasses' "
+			"SYNTAX OMsBoolean "
+			"SINGLE-VALUE )",
+		NULL, NULL },
+
+	{ "rwm-drop-unrequested-attrs", "true|false",
+		2, 2, 0, ARG_MAGIC|ARG_ON_OFF|RWM_CF_DROP_UNREQUESTED, rwm_cf_gen,
+		"( OLcfgOvAt:16.5 NAME 'olcRwmDropUnrequested' "
+			"DESC 'Drop unrequested attributes' "
+			"SYNTAX OMsBoolean "
+			"SINGLE-VALUE )",
+		NULL, NULL },
+
+	{ NULL, NULL, 0, 0, 0, ARG_IGNORED }
+};
+
+static ConfigOCs rwmocs[] = {
+	{ "( OLcfgOvOc:16.1 "
+		"NAME 'olcRwmConfig' "
+		"DESC 'Rewrite/remap configuration' "
+		"SUP olcOverlayConfig "
+		"MAY ( "
+			"olcRwmRewrite $ "
+			"olcRwmTFSupport $ "
+			"olcRwmMap $ "
+			"olcRwmNormalizeMapped $ "
+			"olcRwmDropUnrequested"
+			") )",
+		Cft_Overlay, rwmcfg, NULL, NULL },
+	{ NULL, 0, NULL }
+};
+
+static void
+slap_bv_x_ordered_unparse( BerVarray in, BerVarray *out )
+{
+	int		i;
+	BerVarray	bva = NULL;
+	char		ibuf[32], *ptr;
+	struct berval	idx;
+
+	assert( in != NULL );
+
+	for ( i = 0; !BER_BVISNULL( &in[i] ); i++ )
+		/* count'em */ ;
+
+	if ( i == 0 ) {
+		return;
+	}
+
+	idx.bv_val = ibuf;
+
+	bva = ch_malloc( ( i + 1 ) * sizeof(struct berval) );
+	BER_BVZERO( &bva[ 0 ] );
+
+	for ( i = 0; !BER_BVISNULL( &in[i] ); i++ ) {
+		idx.bv_len = snprintf( idx.bv_val, sizeof( ibuf ), "{%d}", i );
+		if ( idx.bv_len >= sizeof( ibuf ) ) {
+			ber_bvarray_free( bva );
+			return;
+		}
+
+		bva[i].bv_len = idx.bv_len + in[i].bv_len;
+		bva[i].bv_val = ch_malloc( bva[i].bv_len + 1 );
+		ptr = lutil_strcopy( bva[i].bv_val, ibuf );
+		ptr = lutil_strcopy( ptr, in[i].bv_val );
+		*ptr = '\0';
+		BER_BVZERO( &bva[ i + 1 ] );
+	}
+
+	*out = bva;
+}
+
+static int
+rwm_bva_add(
+	BerVarray		*bva,
+	int			idx,
+	char			**argv )
+{
+	char		*line;
+	struct berval	bv;
+
+	line = ldap_charray2str( argv, "\" \"" );
+	if ( line != NULL ) {
+		int	len = strlen( argv[ 0 ] );
+
+		ber_str2bv( line, 0, 0, &bv );
+		AC_MEMCPY( &bv.bv_val[ len ], &bv.bv_val[ len + 1 ],
+			bv.bv_len - ( len + 1 ) );
+		bv.bv_val[ bv.bv_len - 1 ] = '"';
+
+		if ( idx == -1 ) {
+			ber_bvarray_add( bva, &bv );
+
+		} else {
+			(*bva)[ idx ] = bv;
+		}
+
+		return 0;
+	}
+
+	return -1;
+}
+
+static int
+rwm_bva_rewrite_add(
+	struct ldaprwmap	*rwmap,
+	int			idx,
+	char			**argv )
+{
+	return rwm_bva_add( &rwmap->rwm_bva_rewrite, idx, argv );
+}
+
+#ifdef unused
+static int
+rwm_bva_map_add(
+	struct ldaprwmap	*rwmap,
+	int			idx,
+	char			**argv )
+{
+	return rwm_bva_add( &rwmap->rwm_bva_map, idx, argv );
+}
+#endif /* unused */
+
+static int
+rwm_info_init( struct rewrite_info ** rwm_rw )
+{
+	char			*rargv[ 3 ];
+
+ 	*rwm_rw = rewrite_info_init( REWRITE_MODE_USE_DEFAULT );
+	if ( *rwm_rw == NULL ) {
+ 		return -1;
+ 	}
+
+	/* this rewriteContext by default must be null;
+	 * rules can be added if required */
+	rargv[ 0 ] = "rewriteContext";
+	rargv[ 1 ] = "searchFilter";
+	rargv[ 2 ] = NULL;
+	rewrite_parse( *rwm_rw, "<suffix massage>", 1, 2, rargv );
+
+	rargv[ 0 ] = "rewriteContext";
+	rargv[ 1 ] = "default";
+	rargv[ 2 ] = NULL;
+	rewrite_parse( *rwm_rw, "<suffix massage>", 2, 2, rargv );
+
+	return 0;
+}
+
+static int
+rwm_cf_gen( ConfigArgs *c )
+{
+	slap_overinst		*on = (slap_overinst *)c->bi;
+	struct ldaprwmap	*rwmap = 
+			(struct ldaprwmap *)on->on_bi.bi_private;
+
+	BackendDB		db;
+	char			*argv0;
+	int			idx0 = 0;
+	int			rc = 0;
+
+	db = *c->be;
+	db.bd_info = c->bi;
+
+	if ( c->op == SLAP_CONFIG_EMIT ) {
+		struct berval	bv = BER_BVNULL;
+
+		switch ( c->type ) {
+		case RWM_CF_REWRITE:
+			if ( rwmap->rwm_bva_rewrite == NULL ) {
+				rc = 1;
+
+			} else {
+				slap_bv_x_ordered_unparse( rwmap->rwm_bva_rewrite, &c->rvalue_vals );
+				if ( !c->rvalue_vals ) {
+					rc = 1;
+				}
+			}
+			break;
+
+		case RWM_CF_T_F_SUPPORT:
+			enum_to_verb( t_f_mode, (rwmap->rwm_flags & RWM_F_SUPPORT_T_F_MASK2), &bv );
+			if ( BER_BVISNULL( &bv ) ) {
+				/* there's something wrong... */
+				assert( 0 );
+				rc = 1;
+
+			} else {
+				value_add_one( &c->rvalue_vals, &bv );
+			}
+			break;
+
+		case RWM_CF_MAP:
+			if ( rwmap->rwm_bva_map == NULL ) {
+				rc = 1;
+
+			} else {
+				slap_bv_x_ordered_unparse( rwmap->rwm_bva_map, &c->rvalue_vals );
+				if ( !c->rvalue_vals ) {
+					rc = 1;
+				}
+			}
+			break;
+
+		case RWM_CF_NORMALIZE_MAPPED:
+			c->value_int = ( rwmap->rwm_flags & RWM_F_NORMALIZE_MAPPED_ATTRS );
+			break;
+
+		case RWM_CF_DROP_UNREQUESTED:
+			c->value_int = ( rwmap->rwm_flags & RWM_F_DROP_UNREQUESTED_ATTRS );
+			break;
+
+		default:
+			assert( 0 );
+			rc = 1;
+		}
+
+		return rc;
+
+	} else if ( c->op == LDAP_MOD_DELETE ) {
+		switch ( c->type ) {
+		case RWM_CF_REWRITE:
+			if ( c->valx >= 0 ) {
+				int i;
+
+				for ( i = 0; !BER_BVISNULL( &rwmap->rwm_bva_rewrite[ i ] ); i++ )
+					/* count'em */ ;
+
+				if ( c->valx >= i ) {
+					rc = 1;
+					break;
+				}
+
+				ber_memfree( rwmap->rwm_bva_rewrite[ c->valx ].bv_val );
+				for ( i = c->valx; !BER_BVISNULL( &rwmap->rwm_bva_rewrite[ i + 1 ] ); i++ )
+				{
+					rwmap->rwm_bva_rewrite[ i ] = rwmap->rwm_bva_rewrite[ i + 1 ];
+				}
+				BER_BVZERO( &rwmap->rwm_bva_rewrite[ i ] );
+
+				rewrite_info_delete( &rwmap->rwm_rw );
+				assert( rwmap->rwm_rw == NULL );
+
+				rc = rwm_info_init( &rwmap->rwm_rw );
+
+				for ( i = 0; !BER_BVISNULL( &rwmap->rwm_bva_rewrite[ i ] ); i++ )
+				{
+					ConfigArgs ca = { 0 };
+
+					ca.line = rwmap->rwm_bva_rewrite[ i ].bv_val;
+					ca.argc = 0;
+					init_config_argv( &ca );
+					config_parse_ldif( &ca );
+
+					argv0 = ca.argv[ 0 ];
+					ca.argv[ 0 ] += STRLENOF( "rwm-" );
+
+					if ( strcasecmp( ca.argv[ 0 ], "suffixmassage" ) == 0 ) {
+						rc = rwm_suffixmassage_config( &db, c->fname, c->lineno,
+							ca.argc, ca.argv );
+
+					} else {
+						rc = rwm_rw_config( &db, c->fname, c->lineno,
+							ca.argc, ca.argv );
+					}
+
+					ca.argv[ 0 ] = argv0;
+
+					ch_free( ca.tline );
+					ch_free( ca.argv );
+
+					assert( rc == 0 );
+				}
+
+			} else if ( rwmap->rwm_rw != NULL ) {
+				rewrite_info_delete( &rwmap->rwm_rw );
+				assert( rwmap->rwm_rw == NULL );
+
+				ber_bvarray_free( rwmap->rwm_bva_rewrite );
+				rwmap->rwm_bva_rewrite = NULL;
+
+				rc = rwm_info_init( &rwmap->rwm_rw );
+			}
+			break;
+
+		case RWM_CF_T_F_SUPPORT:
+			rwmap->rwm_flags &= ~RWM_F_SUPPORT_T_F_MASK2;
+			break;
+
+		case RWM_CF_MAP:
+			if ( c->valx >= 0 ) {
+				struct ldapmap rwm_oc = rwmap->rwm_oc;
+				struct ldapmap rwm_at = rwmap->rwm_at;
+				char *argv[5];
+				int cnt = 0;
+
+				if ( rwmap->rwm_bva_map ) {
+					for ( ; !BER_BVISNULL( &rwmap->rwm_bva_map[ cnt ] ); cnt++ )
+						/* count */ ;
+				}
+
+				if ( c->valx >= cnt ) {
+					rc = 1;
+					break;
+				}
+
+				memset( &rwmap->rwm_oc, 0, sizeof( rwmap->rwm_oc ) );
+				memset( &rwmap->rwm_at, 0, sizeof( rwmap->rwm_at ) );
+
+				/* re-parse all mappings except the one
+				 * that needs to be eliminated */
+				argv[0] = "map";
+				for ( cnt = 0; !BER_BVISNULL( &rwmap->rwm_bva_map[ cnt ] ); cnt++ ) {
+					ConfigArgs ca = { 0 };
+
+					if ( cnt == c->valx ) {
+						continue;
+					}
+
+					ca.line = rwmap->rwm_bva_map[ cnt ].bv_val;
+					ca.argc = 0;
+					init_config_argv( &ca );
+					config_parse_ldif( &ca );
+					
+					argv[1] = ca.argv[0];
+					argv[2] = ca.argv[1];
+					argv[3] = ca.argv[2];
+					argv[4] = ca.argv[3];
+			
+					rc = rwm_m_config( &db, c->fname, c->lineno, ca.argc + 1, argv );
+
+					ch_free( ca.tline );
+					ch_free( ca.argv );
+
+					/* in case of failure, restore
+					 * the existing mapping */
+					if ( rc ) {
+						avl_free( rwmap->rwm_oc.remap, rwm_mapping_dst_free );
+						avl_free( rwmap->rwm_oc.map, rwm_mapping_free );
+						avl_free( rwmap->rwm_at.remap, rwm_mapping_dst_free );
+						avl_free( rwmap->rwm_at.map, rwm_mapping_free );
+						rwmap->rwm_oc = rwm_oc;
+						rwmap->rwm_at = rwm_at;
+						break;
+					}
+				}
+
+				/* in case of success, destroy the old mapping
+				 * and eliminate the deleted one */
+				if ( rc == 0 ) {
+					avl_free( rwm_oc.remap, rwm_mapping_dst_free );
+					avl_free( rwm_oc.map, rwm_mapping_free );
+					avl_free( rwm_at.remap, rwm_mapping_dst_free );
+					avl_free( rwm_at.map, rwm_mapping_free );
+
+					ber_memfree( rwmap->rwm_bva_map[ c->valx ].bv_val );
+					for ( cnt = c->valx; !BER_BVISNULL( &rwmap->rwm_bva_map[ cnt ] ); cnt++ ) {
+						rwmap->rwm_bva_map[ cnt ] = rwmap->rwm_bva_map[ cnt + 1 ];
+					}
+				}
+
+			} else {
+				avl_free( rwmap->rwm_oc.remap, rwm_mapping_dst_free );
+				avl_free( rwmap->rwm_oc.map, rwm_mapping_free );
+				avl_free( rwmap->rwm_at.remap, rwm_mapping_dst_free );
+				avl_free( rwmap->rwm_at.map, rwm_mapping_free );
+
+				rwmap->rwm_oc.remap = NULL;
+				rwmap->rwm_oc.map = NULL;
+				rwmap->rwm_at.remap = NULL;
+				rwmap->rwm_at.map = NULL;
+
+				ber_bvarray_free( rwmap->rwm_bva_map );
+				rwmap->rwm_bva_map = NULL;
+			}
+			break;
+
+		case RWM_CF_NORMALIZE_MAPPED:
+			rwmap->rwm_flags &= ~RWM_F_NORMALIZE_MAPPED_ATTRS;
+			break;
+
+		case RWM_CF_DROP_UNREQUESTED:
+			rwmap->rwm_flags &= ~RWM_F_DROP_UNREQUESTED_ATTRS;
+			break;
+
+		default:
+			return 1;
+		}
+		return rc;
+	}
+
+	if ( strncasecmp( c->argv[ 0 ], "olcRwm", STRLENOF( "olcRwm" ) ) == 0 ) {
+		idx0 = 1;
+	}
+
+	switch ( c->type ) {
+	case RWM_CF_REWRITE:
+		if ( c->valx >= 0 ) {
+			struct rewrite_info *rwm_rw = rwmap->rwm_rw;
+			int i, last;
+
+			for ( last = 0; rwmap->rwm_bva_rewrite && !BER_BVISNULL( &rwmap->rwm_bva_rewrite[ last ] ); last++ )
+				/* count'em */ ;
+
+			if ( c->valx > last ) {
+				c->valx = last;
+			}
+
+			rwmap->rwm_rw = NULL;
+			rc = rwm_info_init( &rwmap->rwm_rw );
+
+			for ( i = 0; i < c->valx; i++ ) {
+				ConfigArgs ca = { 0 };
+
+				ca.line = rwmap->rwm_bva_rewrite[ i ].bv_val;
+				ca.argc = 0;
+				init_config_argv( &ca );
+				config_parse_ldif( &ca );
+
+				argv0 = ca.argv[ 0 ];
+				ca.argv[ 0 ] += STRLENOF( "rwm-" );
+				
+				if ( strcasecmp( ca.argv[ 0 ], "suffixmassage" ) == 0 ) {
+					rc = rwm_suffixmassage_config( &db, c->fname, c->lineno,
+						ca.argc, ca.argv );
+
+				} else {
+					rc = rwm_rw_config( &db, c->fname, c->lineno,
+						ca.argc, ca.argv );
+				}
+
+				ca.argv[ 0 ] = argv0;
+
+				ch_free( ca.tline );
+				ch_free( ca.argv );
+
+				assert( rc == 0 );
+			}
+
+			argv0 = c->argv[ idx0 ];
+			if ( strncasecmp( argv0, "rwm-", STRLENOF( "rwm-" ) ) != 0 ) {
+				return 1;
+			}
+			c->argv[ idx0 ] += STRLENOF( "rwm-" );
+			if ( strcasecmp( c->argv[ idx0 ], "suffixmassage" ) == 0 ) {
+				rc = rwm_suffixmassage_config( &db, c->fname, c->lineno,
+					c->argc - idx0, &c->argv[ idx0 ] );
+
+			} else {
+				rc = rwm_rw_config( &db, c->fname, c->lineno,
+					c->argc - idx0, &c->argv[ idx0 ] );
+			}
+			c->argv[ idx0 ] = argv0;
+			if ( rc != 0 ) {
+				rewrite_info_delete( &rwmap->rwm_rw );
+				assert( rwmap->rwm_rw == NULL );
+
+				rwmap->rwm_rw = rwm_rw;
+				return 1;
+			}
+
+			for ( i = c->valx; rwmap->rwm_bva_rewrite && !BER_BVISNULL( &rwmap->rwm_bva_rewrite[ i ] ); i++ )
+			{
+				ConfigArgs ca = { 0 };
+
+				ca.line = rwmap->rwm_bva_rewrite[ i ].bv_val;
+				ca.argc = 0;
+				init_config_argv( &ca );
+				config_parse_ldif( &ca );
+				
+				argv0 = ca.argv[ 0 ];
+				ca.argv[ 0 ] += STRLENOF( "rwm-" );
+				
+				if ( strcasecmp( ca.argv[ 0 ], "suffixmassage" ) == 0 ) {
+					rc = rwm_suffixmassage_config( &db, c->fname, c->lineno,
+						ca.argc, ca.argv );
+
+				} else {
+					rc = rwm_rw_config( &db, c->fname, c->lineno,
+						ca.argc, ca.argv );
+				}
+
+				ca.argv[ 0 ] = argv0;
+
+				ch_free( ca.tline );
+				ch_free( ca.argv );
+
+				assert( rc == 0 );
+			}
+
+			rwmap->rwm_bva_rewrite = ch_realloc( rwmap->rwm_bva_rewrite,
+				( last + 2 )*sizeof( struct berval ) );
+			BER_BVZERO( &rwmap->rwm_bva_rewrite[last+1] );
+
+			for ( i = last - 1; i >= c->valx; i-- )
+			{
+				rwmap->rwm_bva_rewrite[ i + 1 ] = rwmap->rwm_bva_rewrite[ i ];
+			}
+
+			rwm_bva_rewrite_add( rwmap, c->valx, &c->argv[ idx0 ] );
+
+			rewrite_info_delete( &rwm_rw );
+			assert( rwm_rw == NULL );
+
+			break;
+		}
+
+		argv0 = c->argv[ idx0 ];
+		if ( strncasecmp( argv0, "rwm-", STRLENOF( "rwm-" ) ) != 0 ) {
+			return 1;
+		}
+		c->argv[ idx0 ] += STRLENOF( "rwm-" );
+		if ( strcasecmp( c->argv[ idx0 ], "suffixmassage" ) == 0 ) {
+			rc = rwm_suffixmassage_config( &db, c->fname, c->lineno,
+				c->argc - idx0, &c->argv[ idx0 ] );
+
+		} else {
+			rc = rwm_rw_config( &db, c->fname, c->lineno,
+				c->argc - idx0, &c->argv[ idx0 ] );
+		}
+		c->argv[ idx0 ] = argv0;
+		if ( rc ) {
+			return 1;
+
+		} else {
+			rwm_bva_rewrite_add( rwmap, -1, &c->argv[ idx0 ] );
+		}
+		break;
+
+	case RWM_CF_T_F_SUPPORT:
+		rc = verb_to_mask( c->argv[ 1 ], t_f_mode );
+		if ( BER_BVISNULL( &t_f_mode[ rc ].word ) ) {
+			return 1;
+		}
+
+		rwmap->rwm_flags &= ~RWM_F_SUPPORT_T_F_MASK2;
+		rwmap->rwm_flags |= t_f_mode[ rc ].mask;
+		rc = 0;
+		break;
+
+	case RWM_CF_MAP:
+		if ( c->valx >= 0 ) {
+			struct ldapmap rwm_oc = rwmap->rwm_oc;
+			struct ldapmap rwm_at = rwmap->rwm_at;
+			char *argv[5];
+			int cnt = 0;
+
+			if ( rwmap->rwm_bva_map ) {
+				for ( ; !BER_BVISNULL( &rwmap->rwm_bva_map[ cnt ] ); cnt++ )
+					/* count */ ;
+			}
+
+			if ( c->valx >= cnt ) {
+				c->valx = cnt;
+			}
+
+			memset( &rwmap->rwm_oc, 0, sizeof( rwmap->rwm_oc ) );
+			memset( &rwmap->rwm_at, 0, sizeof( rwmap->rwm_at ) );
+
+			/* re-parse all mappings, including the one
+			 * that needs to be added */
+			argv[0] = "map";
+			for ( cnt = 0; cnt < c->valx; cnt++ ) {
+				ConfigArgs ca = { 0 };
+
+				ca.line = rwmap->rwm_bva_map[ cnt ].bv_val;
+				ca.argc = 0;
+				init_config_argv( &ca );
+				config_parse_ldif( &ca );
+
+				argv[1] = ca.argv[0];
+				argv[2] = ca.argv[1];
+				argv[3] = ca.argv[2];
+				argv[4] = ca.argv[3];
+			
+				rc = rwm_m_config( &db, c->fname, c->lineno, ca.argc + 1, argv );
+
+				ch_free( ca.tline );
+				ch_free( ca.argv );
+
+				/* in case of failure, restore
+				 * the existing mapping */
+				if ( rc ) {
+					goto rwmmap_fail;
+				}
+			}
+
+			argv0 = c->argv[0];
+			c->argv[0] = "map";
+			rc = rwm_m_config( &db, c->fname, c->lineno, c->argc, c->argv );
+			c->argv[0] = argv0;
+			if ( rc ) {
+				goto rwmmap_fail;
+			}
+
+			if ( rwmap->rwm_bva_map ) {
+				for ( ; !BER_BVISNULL( &rwmap->rwm_bva_map[ cnt ] ); cnt++ ) {
+					ConfigArgs ca = { 0 };
+
+					ca.line = rwmap->rwm_bva_map[ cnt ].bv_val;
+					ca.argc = 0;
+					init_config_argv( &ca );
+					config_parse_ldif( &ca );
+			
+					argv[1] = ca.argv[0];
+					argv[2] = ca.argv[1];
+					argv[3] = ca.argv[2];
+					argv[4] = ca.argv[3];
+			
+					rc = rwm_m_config( &db, c->fname, c->lineno, ca.argc + 1, argv );
+
+					ch_free( ca.tline );
+					ch_free( ca.argv );
+
+					/* in case of failure, restore
+					 * the existing mapping */
+					if ( rc ) {
+						goto rwmmap_fail;
+					}
+				}
+			}
+
+			/* in case of success, destroy the old mapping
+			 * and add the new one */
+			if ( rc == 0 ) {
+				BerVarray tmp;
+				struct berval bv, *bvp = &bv;
+
+				if ( rwm_bva_add( &bvp, 0, &c->argv[ idx0 ] ) ) {
+					rc = 1;
+					goto rwmmap_fail;
+				}
+					
+				tmp = ber_memrealloc( rwmap->rwm_bva_map,
+					sizeof( struct berval )*( cnt + 2 ) );
+				if ( tmp == NULL ) {
+					ber_memfree( bv.bv_val );
+					rc = 1;
+					goto rwmmap_fail;
+				}
+				rwmap->rwm_bva_map = tmp;
+				BER_BVZERO( &rwmap->rwm_bva_map[ cnt + 1 ] );
+
+				avl_free( rwm_oc.remap, rwm_mapping_dst_free );
+				avl_free( rwm_oc.map, rwm_mapping_free );
+				avl_free( rwm_at.remap, rwm_mapping_dst_free );
+				avl_free( rwm_at.map, rwm_mapping_free );
+
+				for ( ; cnt-- > c->valx; ) {
+					rwmap->rwm_bva_map[ cnt + 1 ] = rwmap->rwm_bva_map[ cnt ];
+				}
+				rwmap->rwm_bva_map[ c->valx ] = bv;
+
+			} else {
+rwmmap_fail:;
+				avl_free( rwmap->rwm_oc.remap, rwm_mapping_dst_free );
+				avl_free( rwmap->rwm_oc.map, rwm_mapping_free );
+				avl_free( rwmap->rwm_at.remap, rwm_mapping_dst_free );
+				avl_free( rwmap->rwm_at.map, rwm_mapping_free );
+				rwmap->rwm_oc = rwm_oc;
+				rwmap->rwm_at = rwm_at;
+			}
+
+			break;
+		}
+
+		argv0 = c->argv[ 0 ];
+		c->argv[ 0 ] += STRLENOF( "rwm-" );
+		rc = rwm_m_config( &db, c->fname, c->lineno, c->argc, c->argv );
+		c->argv[ 0 ] = argv0;
+		if ( rc ) {
+			return 1;
+
+		} else {
+			char		*line;
+			struct berval	bv;
+
+			line = ldap_charray2str( &c->argv[ 1 ], " " );
+			if ( line != NULL ) {
+				ber_str2bv( line, 0, 0, &bv );
+				ber_bvarray_add( &rwmap->rwm_bva_map, &bv );
+			}
+		}
+		break;
+
+	case RWM_CF_NORMALIZE_MAPPED:
+		if ( c->value_int ) {
+			rwmap->rwm_flags |= RWM_F_NORMALIZE_MAPPED_ATTRS;
+		} else {
+			rwmap->rwm_flags &= ~RWM_F_NORMALIZE_MAPPED_ATTRS;
+		}
+		break;
+
+	case RWM_CF_DROP_UNREQUESTED:
+		if ( c->value_int ) {
+			rwmap->rwm_flags |= RWM_F_DROP_UNREQUESTED_ATTRS;
+		} else {
+			rwmap->rwm_flags &= ~RWM_F_DROP_UNREQUESTED_ATTRS;
+		}
+		break;
+
+	default:
+		assert( 0 );
+		return 1;
+	}
+
+	return rc;
+}
+
+static int
+rwm_db_init(
+	BackendDB	*be,
+	ConfigReply	*cr )
+{
+	slap_overinst		*on = (slap_overinst *) be->bd_info;
+	struct ldaprwmap	*rwmap;
+	int			rc = 0;
+
+	rwmap = (struct ldaprwmap *)ch_calloc( 1, sizeof( struct ldaprwmap ) );
+
+	/* default */
+	rwmap->rwm_flags = RWM_F_DROP_UNREQUESTED_ATTRS;
+
+	rc = rwm_info_init( &rwmap->rwm_rw );
+
+	on->on_bi.bi_private = (void *)rwmap;
+
+	if ( rc ) {
+		(void)rwm_db_destroy( be, NULL );
+	}
+
+	return rc;
+}
+
+static int
+rwm_db_destroy(
+	BackendDB	*be,
+	ConfigReply	*cr )
+{
+	slap_overinst	*on = (slap_overinst *) be->bd_info;
+	int		rc = 0;
+
+	if ( on->on_bi.bi_private ) {
+		struct ldaprwmap	*rwmap = 
+			(struct ldaprwmap *)on->on_bi.bi_private;
+
+		if ( rwmap->rwm_rw ) {
+			rewrite_info_delete( &rwmap->rwm_rw );
+			if ( rwmap->rwm_bva_rewrite )
+				ber_bvarray_free( rwmap->rwm_bva_rewrite );
+		}
+
+		avl_free( rwmap->rwm_oc.remap, rwm_mapping_dst_free );
+		avl_free( rwmap->rwm_oc.map, rwm_mapping_free );
+		avl_free( rwmap->rwm_at.remap, rwm_mapping_dst_free );
+		avl_free( rwmap->rwm_at.map, rwm_mapping_free );
+		ber_bvarray_free( rwmap->rwm_bva_map );
+
+		ch_free( rwmap );
+	}
+
+	return rc;
+}
+
+static slap_overinst rwm = { { NULL } };
+
+#if SLAPD_OVER_RWM == SLAPD_MOD_DYNAMIC
+static
+#endif /* SLAPD_OVER_RWM == SLAPD_MOD_DYNAMIC */
+int
+rwm_initialize( void )
+{
+	int		rc;
+
+	/* Make sure we don't exceed the bits reserved for userland */
+	config_check_userland( RWM_CF_LAST );
+
+	memset( &rwm, 0, sizeof( slap_overinst ) );
+
+	rwm.on_bi.bi_type = "rwm";
+	rwm.on_bi.bi_flags =
+		SLAPO_BFLAG_SINGLE |
+		0;
+
+	rwm.on_bi.bi_db_init = rwm_db_init;
+	rwm.on_bi.bi_db_config = rwm_db_config;
+	rwm.on_bi.bi_db_destroy = rwm_db_destroy;
+
+	rwm.on_bi.bi_op_bind = rwm_op_bind;
+	rwm.on_bi.bi_op_search = rwm_op_search;
+	rwm.on_bi.bi_op_compare = rwm_op_compare;
+	rwm.on_bi.bi_op_modify = rwm_op_modify;
+	rwm.on_bi.bi_op_modrdn = rwm_op_modrdn;
+	rwm.on_bi.bi_op_add = rwm_op_add;
+	rwm.on_bi.bi_op_delete = rwm_op_delete;
+	rwm.on_bi.bi_op_unbind = rwm_op_unbind;
+	rwm.on_bi.bi_extended = rwm_extended;
+#if 1 /* TODO */
+	rwm.on_bi.bi_entry_release_rw = rwm_entry_release_rw;
+	rwm.on_bi.bi_entry_get_rw = rwm_entry_get_rw;
+#endif
+
+	rwm.on_bi.bi_operational = rwm_operational;
+	rwm.on_bi.bi_chk_referrals = 0 /* rwm_chk_referrals */ ;
+
+	rwm.on_bi.bi_connection_init = rwm_conn_init;
+	rwm.on_bi.bi_connection_destroy = rwm_conn_destroy;
+
+	rwm.on_response = rwm_response;
+
+	rwm.on_bi.bi_cf_ocs = rwmocs;
+
+	rc = config_register_schema( rwmcfg, rwmocs );
+	if ( rc ) {
+		return rc;
+	}
+
+	return overlay_register( &rwm );
+}
+
+#if SLAPD_OVER_RWM == SLAPD_MOD_DYNAMIC
+int
+init_module( int argc, char *argv[] )
+{
+	return rwm_initialize();
+}
+#endif /* SLAPD_OVER_RWM == SLAPD_MOD_DYNAMIC */
+
+#endif /* SLAPD_OVER_RWM */