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, 1423 insertions, 0 deletions

diff --git a/servers/slapd/overlays/translucent.c b/servers/slapd/overlays/translucent.c
new file mode 100644
index 0000000..f25118b
--- /dev/null
+++ b/servers/slapd/overlays/translucent.c
@@ -0,0 +1,1423 @@
+/* translucent.c - translucent proxy module */
+/* $OpenLDAP$ */
+/* This work is part of OpenLDAP Software <http://www.openldap.org/>.
+ *
+ * Copyright 2004-2021 The OpenLDAP Foundation.
+ * Portions Copyright 2005 Symas Corporation.
+ * 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 Symas Corp. for inclusion in
+ * OpenLDAP Software.  This work was sponsored by Hewlett-Packard.
+ */
+
+#include "portable.h"
+
+#ifdef SLAPD_OVER_TRANSLUCENT
+
+#include <stdio.h>
+
+#include <ac/string.h>
+#include <ac/socket.h>
+
+#include "slap.h"
+#include "lutil.h"
+
+#include "config.h"
+
+/* config block */
+typedef struct translucent_info {
+	BackendDB db;			/* captive backend */
+	AttributeName *local;	/* valid attrs for local filters */
+	AttributeName *remote;	/* valid attrs for remote filters */
+	int strict;
+	int no_glue;
+	int defer_db_open;
+	int bind_local;
+	int pwmod_local;
+} translucent_info;
+
+static ConfigLDAPadd translucent_ldadd;
+static ConfigCfAdd translucent_cfadd;
+
+static ConfigDriver translucent_cf_gen;
+
+enum {
+	TRANS_LOCAL = 1,
+	TRANS_REMOTE
+};
+
+static ConfigTable translucentcfg[] = {
+	{ "translucent_strict", "on|off", 1, 2, 0,
+	  ARG_ON_OFF|ARG_OFFSET,
+	  (void *)offsetof(translucent_info, strict),
+	  "( OLcfgOvAt:14.1 NAME 'olcTranslucentStrict' "
+	  "DESC 'Reveal attribute deletion constraint violations' "
+	  "SYNTAX OMsBoolean SINGLE-VALUE )", NULL, NULL },
+	{ "translucent_no_glue", "on|off", 1, 2, 0,
+	  ARG_ON_OFF|ARG_OFFSET,
+	  (void *)offsetof(translucent_info, no_glue),
+	  "( OLcfgOvAt:14.2 NAME 'olcTranslucentNoGlue' "
+	  "DESC 'Disable automatic glue records for ADD and MODRDN' "
+	  "SYNTAX OMsBoolean SINGLE-VALUE )", NULL, NULL },
+	{ "translucent_local", "attr[,attr...]", 1, 2, 0,
+	  ARG_MAGIC|TRANS_LOCAL,
+	  translucent_cf_gen,
+	  "( OLcfgOvAt:14.3 NAME 'olcTranslucentLocal' "
+	  "DESC 'Attributes to use in local search filter' "
+	  "SYNTAX OMsDirectoryString )", NULL, NULL },
+	{ "translucent_remote", "attr[,attr...]", 1, 2, 0,
+	  ARG_MAGIC|TRANS_REMOTE,
+	  translucent_cf_gen,
+	  "( OLcfgOvAt:14.4 NAME 'olcTranslucentRemote' "
+	  "DESC 'Attributes to use in remote search filter' "
+	  "SYNTAX OMsDirectoryString )", NULL, NULL },
+	{ "translucent_bind_local", "on|off", 1, 2, 0,
+	  ARG_ON_OFF|ARG_OFFSET,
+	  (void *)offsetof(translucent_info, bind_local),
+	  "( OLcfgOvAt:14.5 NAME 'olcTranslucentBindLocal' "
+	  "DESC 'Enable local bind' "
+	  "SYNTAX OMsBoolean SINGLE-VALUE)", NULL, NULL },
+	{ "translucent_pwmod_local", "on|off", 1, 2, 0,
+	  ARG_ON_OFF|ARG_OFFSET,
+	  (void *)offsetof(translucent_info, pwmod_local),
+	  "( OLcfgOvAt:14.6 NAME 'olcTranslucentPwModLocal' "
+	  "DESC 'Enable local RFC 3062 Password Modify extended operation' "
+	  "SYNTAX OMsBoolean SINGLE-VALUE)", NULL, NULL },
+	{ NULL, NULL, 0, 0, 0, ARG_IGNORED }
+};
+
+static ConfigOCs translucentocs[] = {
+	{ "( OLcfgOvOc:14.1 "
+	  "NAME 'olcTranslucentConfig' "
+	  "DESC 'Translucent configuration' "
+	  "SUP olcOverlayConfig "
+	  "MAY ( olcTranslucentStrict $ olcTranslucentNoGlue $"
+	  " olcTranslucentLocal $ olcTranslucentRemote $"
+	  " olcTranslucentBindLocal $ olcTranslucentPwModLocal ) )",
+	  Cft_Overlay, translucentcfg, NULL, translucent_cfadd },
+	{ "( OLcfgOvOc:14.2 "
+	  "NAME 'olcTranslucentDatabase' "
+	  "DESC 'Translucent target database configuration' "
+	/* co_table is initialized in translucent_initialize() */
+	  "AUXILIARY )", Cft_Misc, NULL, translucent_ldadd },
+	{ NULL, 0, NULL }
+};
+/* for translucent_init() */
+
+static int
+translucent_ldadd_cleanup( ConfigArgs *ca )
+{
+	slap_overinst *on = ca->ca_private;
+	translucent_info *ov = on->on_bi.bi_private;
+
+	ov->defer_db_open = 0;
+	return backend_startup_one( ca->be, &ca->reply );
+}
+
+static int
+translucent_ldadd( CfEntryInfo *cei, Entry *e, ConfigArgs *ca )
+{
+	slap_overinst *on;
+	translucent_info *ov;
+
+	Debug(LDAP_DEBUG_TRACE, "==> translucent_ldadd\n", 0, 0, 0);
+
+	if ( cei->ce_type != Cft_Overlay || !cei->ce_bi ||
+	     cei->ce_bi->bi_cf_ocs != translucentocs )
+		return LDAP_CONSTRAINT_VIOLATION;
+
+	on = (slap_overinst *)cei->ce_bi;
+	ov = on->on_bi.bi_private;
+	ca->be = &ov->db;
+	ca->ca_private = on;
+	if ( CONFIG_ONLINE_ADD( ca ))
+		ca->cleanup = translucent_ldadd_cleanup;
+	else
+		ov->defer_db_open = 0;
+
+	return LDAP_SUCCESS;
+}
+
+static int
+translucent_cfadd( Operation *op, SlapReply *rs, Entry *e, ConfigArgs *ca )
+{
+	CfEntryInfo *cei = e->e_private;
+	slap_overinst *on = (slap_overinst *)cei->ce_bi;
+	translucent_info *ov = on->on_bi.bi_private;
+	struct berval bv;
+
+	Debug(LDAP_DEBUG_TRACE, "==> translucent_cfadd\n", 0, 0, 0);
+
+	/* FIXME: should not hardcode "olcDatabase" here */
+	bv.bv_len = snprintf( ca->cr_msg, sizeof( ca->cr_msg ),
+		"olcDatabase=" SLAP_X_ORDERED_FMT "%s",
+		0, ov->db.bd_info->bi_type );
+	if ( bv.bv_len >= sizeof( ca->cr_msg ) ) {
+		return -1;
+	}
+	bv.bv_val = ca->cr_msg;
+	ca->be = &ov->db;
+	ov->defer_db_open = 0;
+
+	/* We can only create this entry if the database is table-driven
+	 */
+	if ( ov->db.bd_info->bi_cf_ocs )
+		config_build_entry( op, rs, cei, ca, &bv,
+				    ov->db.bd_info->bi_cf_ocs,
+				    &translucentocs[1] );
+
+	return 0;
+}
+
+static int
+translucent_cf_gen( ConfigArgs *c )
+{
+	slap_overinst	*on = (slap_overinst *)c->bi;
+	translucent_info *ov = on->on_bi.bi_private;
+	AttributeName **an, *a2;
+	int i;
+
+	if ( c->type == TRANS_LOCAL )
+		an = &ov->local;
+	else
+		an = &ov->remote;
+
+	if ( c->op == SLAP_CONFIG_EMIT ) {
+		if ( !*an )
+			return 1;
+		for ( i = 0; !BER_BVISNULL(&(*an)[i].an_name); i++ ) {
+			value_add_one( &c->rvalue_vals, &(*an)[i].an_name );
+		}
+		return ( i < 1 );
+	} else if ( c->op == LDAP_MOD_DELETE ) {
+		if ( c->valx < 0 ) {
+			anlist_free( *an, 1, NULL );
+			*an = NULL;
+		} else {
+			i = c->valx;
+			ch_free( (*an)[i].an_name.bv_val );
+			do {
+				(*an)[i] = (*an)[i+1];
+				i++;
+			} while ( !BER_BVISNULL( &(*an)[i].an_name ));
+		}
+		return 0;
+	}
+	a2 = str2anlist( *an, c->argv[1], "," );
+	if ( !a2 ) {
+		snprintf( c->cr_msg, sizeof( c->cr_msg ), "%s unable to parse attribute %s",
+			c->argv[0], c->argv[1] );
+		Debug( LDAP_DEBUG_CONFIG|LDAP_DEBUG_NONE,
+			"%s: %s\n", c->log, c->cr_msg, 0 );
+		return ARG_BAD_CONF;
+	}
+	*an = a2;
+	return 0;
+}
+
+static slap_overinst translucent;
+
+/*
+** glue_parent()
+**	call syncrepl_add_glue() with the parent suffix;
+**
+*/
+
+static struct berval glue[] = { BER_BVC("top"), BER_BVC("glue"), BER_BVNULL };
+
+void glue_parent(Operation *op) {
+	Operation nop = *op;
+	slap_overinst *on = (slap_overinst *) op->o_bd->bd_info;
+	struct berval ndn = BER_BVNULL;
+	Attribute *a;
+	Entry *e;
+	struct berval	pdn;
+
+	dnParent( &op->o_req_ndn, &pdn );
+	ber_dupbv_x( &ndn, &pdn, op->o_tmpmemctx );
+
+	Debug(LDAP_DEBUG_TRACE, "=> glue_parent: fabricating glue for <%s>\n", ndn.bv_val, 0, 0);
+
+	e = entry_alloc();
+	e->e_id = NOID;
+	ber_dupbv(&e->e_name, &ndn);
+	ber_dupbv(&e->e_nname, &ndn);
+
+	a = attr_alloc( slap_schema.si_ad_objectClass );
+	a->a_numvals = 2;
+	a->a_vals = ch_malloc(sizeof(struct berval) * 3);
+	ber_dupbv(&a->a_vals[0], &glue[0]);
+	ber_dupbv(&a->a_vals[1], &glue[1]);
+	ber_dupbv(&a->a_vals[2], &glue[2]);
+	a->a_nvals = a->a_vals;
+	a->a_next = e->e_attrs;
+	e->e_attrs = a;
+
+	a = attr_alloc( slap_schema.si_ad_structuralObjectClass );
+	a->a_numvals = 1;
+	a->a_vals = ch_malloc(sizeof(struct berval) * 2);
+	ber_dupbv(&a->a_vals[0], &glue[1]);
+	ber_dupbv(&a->a_vals[1], &glue[2]);
+	a->a_nvals = a->a_vals;
+	a->a_next = e->e_attrs;
+	e->e_attrs = a;
+
+	nop.o_req_dn = ndn;
+	nop.o_req_ndn = ndn;
+	nop.ora_e = e;
+
+	nop.o_bd->bd_info = (BackendInfo *) on->on_info->oi_orig;
+	syncrepl_add_glue(&nop, e);
+	nop.o_bd->bd_info = (BackendInfo *) on;
+
+	op->o_tmpfree( ndn.bv_val, op->o_tmpmemctx );
+
+	return;
+}
+
+/*
+** free_attr_chain()
+**	free only the Attribute*, not the contents;
+**
+*/
+void free_attr_chain(Attribute *b) {
+	Attribute *a;
+	for(a=b; a; a=a->a_next) {
+		a->a_vals = NULL;
+		a->a_nvals = NULL;
+	}
+	attrs_free( b );
+	return;
+}
+
+/*
+** translucent_add()
+**	if not bound as root, send ACCESS error;
+**	if glue, glue_parent();
+**	return CONTINUE;
+**
+*/
+
+static int translucent_add(Operation *op, SlapReply *rs) {
+	slap_overinst *on = (slap_overinst *) op->o_bd->bd_info;
+	translucent_info *ov = on->on_bi.bi_private;
+	Debug(LDAP_DEBUG_TRACE, "==> translucent_add: %s\n",
+		op->o_req_dn.bv_val, 0, 0);
+	if(!be_isroot(op)) {
+		op->o_bd->bd_info = (BackendInfo *) on->on_info;
+		send_ldap_error(op, rs, LDAP_INSUFFICIENT_ACCESS,
+			"user modification of overlay database not permitted");
+		op->o_bd->bd_info = (BackendInfo *) on;
+		return(rs->sr_err);
+	}
+	if(!ov->no_glue) glue_parent(op);
+	return(SLAP_CB_CONTINUE);
+}
+
+/*
+** translucent_modrdn()
+**	if not bound as root, send ACCESS error;
+**	if !glue, glue_parent();
+**	else return CONTINUE;
+**
+*/
+
+static int translucent_modrdn(Operation *op, SlapReply *rs) {
+	slap_overinst *on = (slap_overinst *) op->o_bd->bd_info;
+	translucent_info *ov = on->on_bi.bi_private;
+	Debug(LDAP_DEBUG_TRACE, "==> translucent_modrdn: %s -> %s\n",
+		op->o_req_dn.bv_val, op->orr_newrdn.bv_val, 0);
+	if(!be_isroot(op)) {
+		op->o_bd->bd_info = (BackendInfo *) on->on_info;
+		send_ldap_error(op, rs, LDAP_INSUFFICIENT_ACCESS,
+			"user modification of overlay database not permitted");
+		op->o_bd->bd_info = (BackendInfo *) on;
+		return(rs->sr_err);
+	}
+	if(!ov->no_glue) {
+		op->o_tag = LDAP_REQ_ADD;
+		glue_parent(op);
+		op->o_tag = LDAP_REQ_MODRDN;
+	}
+	return(SLAP_CB_CONTINUE);
+}
+
+/*
+** translucent_delete()
+**	if not bound as root, send ACCESS error;
+**	else return CONTINUE;
+**
+*/
+
+static int translucent_delete(Operation *op, SlapReply *rs) {
+	slap_overinst *on = (slap_overinst *) op->o_bd->bd_info;
+	Debug(LDAP_DEBUG_TRACE, "==> translucent_delete: %s\n",
+		op->o_req_dn.bv_val, 0, 0);
+	if(!be_isroot(op)) {
+		op->o_bd->bd_info = (BackendInfo *) on->on_info;
+		send_ldap_error(op, rs, LDAP_INSUFFICIENT_ACCESS,
+			"user modification of overlay database not permitted");
+		op->o_bd->bd_info = (BackendInfo *) on;
+		return(rs->sr_err);
+	}
+	return(SLAP_CB_CONTINUE);
+}
+
+static int
+translucent_tag_cb( Operation *op, SlapReply *rs )
+{
+	op->o_tag = LDAP_REQ_MODIFY;
+	op->orm_modlist = op->o_callback->sc_private;
+	rs->sr_tag = slap_req2res( op->o_tag );
+
+	return SLAP_CB_CONTINUE;
+}
+
+/*
+** translucent_modify()
+**	modify in local backend if exists in both;
+**	otherwise, add to local backend;
+**	fail if not defined in captive backend;
+**
+*/
+
+static int translucent_modify(Operation *op, SlapReply *rs) {
+	SlapReply nrs = { REP_RESULT };
+
+	slap_overinst *on = (slap_overinst *) op->o_bd->bd_info;
+	translucent_info *ov = on->on_bi.bi_private;
+	Entry *e = NULL, *re = NULL;
+	Attribute *a, *ax;
+	Modifications *m, **mm;
+	BackendDB *db;
+	int del, rc, erc = 0;
+	slap_callback cb = { 0 };
+
+	Debug(LDAP_DEBUG_TRACE, "==> translucent_modify: %s\n",
+		op->o_req_dn.bv_val, 0, 0);
+
+	if(ov->defer_db_open) {
+		send_ldap_error(op, rs, LDAP_UNAVAILABLE,
+			"remote DB not available");
+		return(rs->sr_err);
+	}
+/*
+** fetch entry from the captive backend;
+** if it did not exist, fail;
+** release it, if captive backend supports this;
+**
+*/
+
+	db = op->o_bd;
+	op->o_bd = &ov->db;
+	ov->db.be_acl = op->o_bd->be_acl;
+	rc = ov->db.bd_info->bi_entry_get_rw(op, &op->o_req_ndn, NULL, NULL, 0, &re);
+	op->o_bd = db;
+	if(rc != LDAP_SUCCESS || re == NULL ) {
+		send_ldap_error((op), rs, LDAP_NO_SUCH_OBJECT,
+			"attempt to modify nonexistent local record");
+		return(rs->sr_err);
+	}
+/*
+** fetch entry from local backend;
+** if it exists:
+**	foreach Modification:
+**	    if attr not present in local:
+**		if Mod == LDAP_MOD_DELETE:
+**		    if remote attr not present, return NO_SUCH;
+**		    if remote attr present, drop this Mod;
+**		else force this Mod to LDAP_MOD_ADD;
+**	return CONTINUE;
+**
+*/
+
+	op->o_bd->bd_info = (BackendInfo *) on->on_info->oi_orig;
+	rc = be_entry_get_rw(op, &op->o_req_ndn, NULL, NULL, 0, &e);
+	op->o_bd->bd_info = (BackendInfo *) on;
+
+	if(e && rc == LDAP_SUCCESS) {
+		Debug(LDAP_DEBUG_TRACE, "=> translucent_modify: found local entry\n", 0, 0, 0);
+		for(mm = &op->orm_modlist; *mm; ) {
+			m = *mm;
+			for(a = e->e_attrs; a; a = a->a_next)
+				if(a->a_desc == m->sml_desc) break;
+			if(a) {
+				mm = &m->sml_next;
+				continue;		/* found local attr */
+			}
+			if(m->sml_op == LDAP_MOD_DELETE) {
+				for(a = re->e_attrs; a; a = a->a_next)
+					if(a->a_desc == m->sml_desc) break;
+				/* not found remote attr */
+				if(!a) {
+					erc = LDAP_NO_SUCH_ATTRIBUTE;
+					goto release;
+				}
+				if(ov->strict) {
+					erc = LDAP_CONSTRAINT_VIOLATION;
+					goto release;
+				}
+				Debug(LDAP_DEBUG_TRACE,
+					"=> translucent_modify: silently dropping delete: %s\n",
+					m->sml_desc->ad_cname.bv_val, 0, 0);
+				*mm = m->sml_next;
+				m->sml_next = NULL;
+				slap_mods_free(m, 1);
+				continue;
+			}
+			m->sml_op = LDAP_MOD_ADD;
+			mm = &m->sml_next;
+		}
+		erc = SLAP_CB_CONTINUE;
+release:
+		if(re) {
+			if(ov->db.bd_info->bi_entry_release_rw) {
+				op->o_bd = &ov->db;
+				ov->db.bd_info->bi_entry_release_rw(op, re, 0);
+				op->o_bd = db;
+			} else
+				entry_free(re);
+		}
+		op->o_bd->bd_info = (BackendInfo *) on->on_info->oi_orig;
+		be_entry_release_r(op, e);
+		op->o_bd->bd_info = (BackendInfo *) on;
+		if(erc == SLAP_CB_CONTINUE) {
+			return(erc);
+		} else if(erc) {
+			send_ldap_error(op, rs, erc,
+				"attempt to delete nonexistent attribute");
+			return(erc);
+		}
+	}
+
+	/* don't leak remote entry copy */
+	if(re) {
+		if(ov->db.bd_info->bi_entry_release_rw) {
+			op->o_bd = &ov->db;
+			ov->db.bd_info->bi_entry_release_rw(op, re, 0);
+			op->o_bd = db;
+		} else
+			entry_free(re);
+	}
+/*
+** foreach Modification:
+**	if MOD_ADD or MOD_REPLACE, add Attribute;
+** if no Modifications were suitable:
+**	if strict, throw CONSTRAINT_VIOLATION;
+**	else, return early SUCCESS;
+** fabricate Entry with new Attribute chain;
+** glue_parent() for this Entry;
+** call bi_op_add() in local backend;
+**
+*/
+
+	Debug(LDAP_DEBUG_TRACE, "=> translucent_modify: fabricating local add\n", 0, 0, 0);
+	a = NULL;
+	for(del = 0, ax = NULL, m = op->orm_modlist; m; m = m->sml_next) {
+		Attribute atmp;
+		if(((m->sml_op & LDAP_MOD_OP) != LDAP_MOD_ADD) &&
+		   ((m->sml_op & LDAP_MOD_OP) != LDAP_MOD_REPLACE)) {
+			Debug(LDAP_DEBUG_ANY,
+				"=> translucent_modify: silently dropped modification(%d): %s\n",
+				m->sml_op, m->sml_desc->ad_cname.bv_val, 0);
+			if((m->sml_op & LDAP_MOD_OP) == LDAP_MOD_DELETE) del++;
+			continue;
+		}
+		atmp.a_desc = m->sml_desc;
+		atmp.a_vals = m->sml_values;
+		atmp.a_nvals = m->sml_nvalues ? m->sml_nvalues : atmp.a_vals;
+		atmp.a_numvals = m->sml_numvals;
+		atmp.a_flags = 0;
+		a = attr_dup( &atmp );
+		a->a_next  = ax;
+		ax = a;
+	}
+
+	if(del && ov->strict) {
+		attrs_free( a );
+		send_ldap_error(op, rs, LDAP_CONSTRAINT_VIOLATION,
+			"attempt to delete attributes from local database");
+		return(rs->sr_err);
+	}
+
+	if(!ax) {
+		if(ov->strict) {
+			send_ldap_error(op, rs, LDAP_CONSTRAINT_VIOLATION,
+				"modification contained other than ADD or REPLACE");
+			return(rs->sr_err);
+		}
+		/* rs->sr_text = "no valid modification found"; */
+		rs->sr_err = LDAP_SUCCESS;
+		send_ldap_result(op, rs);
+		return(rs->sr_err);
+	}
+
+	e = entry_alloc();
+	ber_dupbv( &e->e_name, &op->o_req_dn );
+	ber_dupbv( &e->e_nname, &op->o_req_ndn );
+	e->e_attrs = a;
+
+	op->o_tag	= LDAP_REQ_ADD;
+	cb.sc_response = translucent_tag_cb;
+	cb.sc_private = op->orm_modlist;
+	op->oq_add.rs_e	= e;
+
+	glue_parent(op);
+
+	cb.sc_next = op->o_callback;
+	op->o_callback = &cb;
+	rc = on->on_info->oi_orig->bi_op_add(op, &nrs);
+	if ( op->ora_e == e )
+		entry_free( e );
+	op->o_callback = cb.sc_next;
+
+	return(rc);
+}
+
+static int translucent_compare(Operation *op, SlapReply *rs) {
+	slap_overinst *on = (slap_overinst *) op->o_bd->bd_info;
+	translucent_info *ov = on->on_bi.bi_private;
+	AttributeAssertion *ava = op->orc_ava;
+	Entry *e = NULL;
+	BackendDB *db;
+	int rc;
+
+	Debug(LDAP_DEBUG_TRACE, "==> translucent_compare: <%s> %s:%s\n",
+		op->o_req_dn.bv_val, ava->aa_desc->ad_cname.bv_val, ava->aa_value.bv_val);
+
+/*
+** if the local backend has an entry for this attribute:
+**	CONTINUE and let it do the compare;
+**
+*/
+	rc = overlay_entry_get_ov(op, &op->o_req_ndn, NULL, ava->aa_desc, 0, &e, on);
+	if(rc == LDAP_SUCCESS && e) {
+		overlay_entry_release_ov(op, e, 0, on);
+		return(SLAP_CB_CONTINUE);
+	}
+
+	if(ov->defer_db_open) {
+		send_ldap_error(op, rs, LDAP_UNAVAILABLE,
+			"remote DB not available");
+		return(rs->sr_err);
+	}
+/*
+** call compare() in the captive backend;
+** return the result;
+**
+*/
+	db = op->o_bd;
+	op->o_bd = &ov->db;
+	ov->db.be_acl = op->o_bd->be_acl;
+	rc = ov->db.bd_info->bi_op_compare(op, rs);
+	op->o_bd = db;
+
+	return(rc);
+}
+
+static int translucent_pwmod(Operation *op, SlapReply *rs) {
+	SlapReply nrs = { REP_RESULT };
+	Operation nop;
+
+	slap_overinst *on = (slap_overinst *) op->o_bd->bd_info;
+	translucent_info *ov = on->on_bi.bi_private;
+	Entry *e = NULL, *re = NULL;
+	BackendDB *db;
+	int rc = 0;
+	slap_callback cb = { 0 };
+
+	if (!ov->pwmod_local) {
+		rs->sr_err = LDAP_CONSTRAINT_VIOLATION,
+		rs->sr_text = "attempt to modify password in local database";
+		return rs->sr_err;
+	}
+
+/*
+** fetch entry from the captive backend;
+** if it did not exist, fail;
+** release it, if captive backend supports this;
+**
+*/
+	db = op->o_bd;
+	op->o_bd = &ov->db;
+	ov->db.be_acl = op->o_bd->be_acl;
+	rc = ov->db.bd_info->bi_entry_get_rw(op, &op->o_req_ndn, NULL, NULL, 0, &re);
+	if(rc != LDAP_SUCCESS || re == NULL ) {
+		send_ldap_error((op), rs, LDAP_NO_SUCH_OBJECT,
+			"attempt to modify nonexistent local record");
+		return(rs->sr_err);
+	}
+	op->o_bd = db;
+/*
+** fetch entry from local backend;
+** if it exists:
+**	return CONTINUE;
+*/
+
+	op->o_bd->bd_info = (BackendInfo *) on->on_info->oi_orig;
+	rc = be_entry_get_rw(op, &op->o_req_ndn, NULL, NULL, 0, &e);
+	op->o_bd->bd_info = (BackendInfo *) on;
+
+	if(e && rc == LDAP_SUCCESS) {
+		if(re) {
+			if(ov->db.bd_info->bi_entry_release_rw) {
+				op->o_bd = &ov->db;
+				ov->db.bd_info->bi_entry_release_rw(op, re, 0);
+				op->o_bd = db;
+			} else {
+				entry_free(re);
+			}
+		}
+		op->o_bd->bd_info = (BackendInfo *) on->on_info->oi_orig;
+		be_entry_release_r(op, e);
+		op->o_bd->bd_info = (BackendInfo *) on;
+		return SLAP_CB_CONTINUE;
+	}
+
+	/* don't leak remote entry copy */
+	if(re) {
+		if(ov->db.bd_info->bi_entry_release_rw) {
+			op->o_bd = &ov->db;
+			ov->db.bd_info->bi_entry_release_rw(op, re, 0);
+			op->o_bd = db;
+		} else {
+			entry_free(re);
+		}
+	}
+/*
+** glue_parent() for this Entry;
+** call bi_op_add() in local backend;
+**
+*/
+	e = entry_alloc();
+	ber_dupbv( &e->e_name, &op->o_req_dn );
+	ber_dupbv( &e->e_nname, &op->o_req_ndn );
+	e->e_attrs = NULL;
+
+	nop = *op;
+	nop.o_tag = LDAP_REQ_ADD;
+	cb.sc_response = slap_null_cb;
+	nop.oq_add.rs_e	= e;
+
+	glue_parent(&nop);
+
+	nop.o_callback = &cb;
+	rc = on->on_info->oi_orig->bi_op_add(&nop, &nrs);
+	if ( nop.ora_e == e ) {
+		entry_free( e );
+	}
+
+	if ( rc == LDAP_SUCCESS ) {
+		return SLAP_CB_CONTINUE;
+	}
+
+	return rc;
+}
+
+static int translucent_exop(Operation *op, SlapReply *rs) {
+	slap_overinst *on = (slap_overinst *) op->o_bd->bd_info;
+	translucent_info *ov = on->on_bi.bi_private;
+	const struct berval bv_exop_pwmod = BER_BVC(LDAP_EXOP_MODIFY_PASSWD);
+
+	Debug(LDAP_DEBUG_TRACE, "==> translucent_exop: %s\n",
+		op->o_req_dn.bv_val, 0, 0);
+
+	if(ov->defer_db_open) {
+		send_ldap_error(op, rs, LDAP_UNAVAILABLE,
+			"remote DB not available");
+		return(rs->sr_err);
+	}
+
+	if ( bvmatch( &bv_exop_pwmod, &op->ore_reqoid ) ) {
+		return translucent_pwmod( op, rs );
+	}
+
+	return SLAP_CB_CONTINUE;
+}
+
+/*
+** translucent_search_cb()
+**	merge local data with remote data
+**
+** Four cases:
+** 1: remote search, no local filter
+**	merge data and send immediately
+** 2: remote search, with local filter
+**	merge data and save
+** 3: local search, no remote filter
+**	merge data and send immediately
+** 4: local search, with remote filter
+**	check list, merge, send, delete
+*/
+
+#define	RMT_SIDE	0
+#define	LCL_SIDE	1
+#define	USE_LIST	2
+
+typedef struct trans_ctx {
+	BackendDB *db;
+	slap_overinst *on;
+	Filter *orig;
+	Avlnode *list;
+	int step;
+	int slimit;
+	AttributeName *attrs;
+} trans_ctx;
+
+static int translucent_search_cb(Operation *op, SlapReply *rs) {
+	trans_ctx *tc;
+	BackendDB *db;
+	slap_overinst *on;
+	translucent_info *ov;
+	Entry *le, *re;
+	Attribute *a, *ax, *an, *as = NULL;
+	int rc;
+	int test_f = 0;
+
+	tc = op->o_callback->sc_private;
+
+	/* Don't let the op complete while we're gathering data */
+	if ( rs->sr_type == REP_RESULT && ( tc->step & USE_LIST ))
+		return 0;
+
+	if(rs->sr_type != REP_SEARCH || !rs->sr_entry)
+		return(SLAP_CB_CONTINUE);
+
+	Debug(LDAP_DEBUG_TRACE, "==> translucent_search_cb: %s\n",
+		rs->sr_entry->e_name.bv_val, 0, 0);
+
+	op->ors_slimit = tc->slimit + ( tc->slimit > 0 ? 1 : 0 );
+	if ( op->ors_attrs == slap_anlist_all_attributes ) {
+		op->ors_attrs = tc->attrs;
+		rs->sr_attrs = tc->attrs;
+		rs->sr_attr_flags = slap_attr_flags( rs->sr_attrs );
+	}
+
+	on = tc->on;
+	ov = on->on_bi.bi_private;
+
+	db = op->o_bd;
+	re = NULL;
+
+	/* If we have local, get remote */
+	if ( tc->step & LCL_SIDE ) {
+		le = rs->sr_entry;
+		/* If entry is already on list, use it */
+		if ( tc->step & USE_LIST ) {
+			re = tavl_delete( &tc->list, le, entry_dn_cmp );
+			if ( re ) {
+				rs_flush_entry( op, rs, on );
+				rc = test_filter( op, re, tc->orig );
+				if ( rc == LDAP_COMPARE_TRUE ) {
+					rs->sr_flags |= REP_ENTRY_MUSTBEFREED;
+					rs->sr_entry = re;
+
+					if ( tc->slimit >= 0 && rs->sr_nentries >= tc->slimit ) {
+						return LDAP_SIZELIMIT_EXCEEDED;
+					}
+
+					return SLAP_CB_CONTINUE;
+				} else {
+					entry_free( re );
+					rs->sr_entry = NULL;
+					return 0;
+				}
+			}
+		}
+		op->o_bd = &ov->db;
+		rc = be_entry_get_rw( op, &rs->sr_entry->e_nname, NULL, NULL, 0, &re );
+		if ( rc == LDAP_SUCCESS && re ) {
+			Entry *tmp = entry_dup( re );
+			be_entry_release_r( op, re );
+			re = tmp;
+			test_f = 1;
+		}
+	} else {
+	/* Else we have remote, get local */
+		op->o_bd = tc->db;
+		le = NULL;
+		rc = overlay_entry_get_ov(op, &rs->sr_entry->e_nname, NULL, NULL, 0, &le, on);
+		if ( rc == LDAP_SUCCESS && le ) {
+			re = entry_dup( rs->sr_entry );
+			rs_flush_entry( op, rs, on );
+		} else {
+			le = NULL;
+		}
+	}
+
+/*
+** if we got remote and local entry:
+**	foreach local attr:
+**		foreach remote attr:
+**			if match, remote attr with local attr;
+**			if new local, add to list;
+**	append new local attrs to remote;
+**
+*/
+
+	if ( re && le ) {
+		for(ax = le->e_attrs; ax; ax = ax->a_next) {
+			for(a = re->e_attrs; a; a = a->a_next) {
+				if(a->a_desc == ax->a_desc) {
+					test_f = 1;
+					if(a->a_vals != a->a_nvals)
+						ber_bvarray_free(a->a_nvals);
+					ber_bvarray_free(a->a_vals);
+					ber_bvarray_dup_x( &a->a_vals, ax->a_vals, NULL );
+					if ( ax->a_vals == ax->a_nvals ) {
+						a->a_nvals = a->a_vals;
+					} else {
+						ber_bvarray_dup_x( &a->a_nvals, ax->a_nvals, NULL );
+					}
+					break;
+				}
+			}
+			if(a) continue;
+			an = attr_dup(ax);
+			an->a_next = as;
+			as = an;
+		}
+		/* Dispose of local entry */
+		if ( tc->step & LCL_SIDE ) {
+			rs_flush_entry(op, rs, on);
+		} else {
+			overlay_entry_release_ov(op, le, 0, on);
+		}
+
+		/* literally append, so locals are always last */
+		if(as) {
+			if(re->e_attrs) {
+				for(ax = re->e_attrs; ax->a_next; ax = ax->a_next);
+				ax->a_next = as;
+			} else {
+				re->e_attrs = as;
+			}
+		}
+		/* If both filters, save entry for later */
+		if ( tc->step == (USE_LIST|RMT_SIDE) ) {
+			tavl_insert( &tc->list, re, entry_dn_cmp, avl_dup_error );
+			rs->sr_entry = NULL;
+			rc = 0;
+		} else {
+		/* send it now */
+			rs->sr_entry = re;
+			rs->sr_flags |= REP_ENTRY_MUSTBEFREED;
+			if ( test_f ) {
+				rc = test_filter( op, rs->sr_entry, tc->orig );
+				if ( rc == LDAP_COMPARE_TRUE ) {
+					rc = SLAP_CB_CONTINUE;
+				} else {
+					rc = 0;
+				}
+			} else {
+				rc = SLAP_CB_CONTINUE;
+			}
+		}
+	} else if ( le ) {
+	/* Only a local entry: remote was deleted
+	 * Ought to delete the local too...
+	 */
+	 	rc = 0;
+	} else if ( tc->step & USE_LIST ) {
+	/* Only a remote entry, but both filters:
+	 * Test the complete filter
+	 */
+		rc = test_filter( op, rs->sr_entry, tc->orig );
+		if ( rc == LDAP_COMPARE_TRUE ) {
+			rc = SLAP_CB_CONTINUE;
+		} else {
+			rc = 0;
+		}
+	} else {
+	/* Only a remote entry, only remote filter:
+	 * just pass thru
+	 */
+		rc = SLAP_CB_CONTINUE;
+	}
+
+	op->o_bd = db;
+
+	if ( rc == SLAP_CB_CONTINUE && tc->slimit >= 0 && rs->sr_nentries >= tc->slimit ) {
+		return LDAP_SIZELIMIT_EXCEEDED;
+	}
+
+	return rc;
+}
+
+/* Dup the filter, excluding invalid elements */
+static Filter *
+trans_filter_dup(Operation *op, Filter *f, AttributeName *an)
+{
+	Filter *n = NULL;
+
+	if ( !f )
+		return NULL;
+
+	switch( f->f_choice & SLAPD_FILTER_MASK ) {
+	case SLAPD_FILTER_COMPUTED:
+		n = op->o_tmpalloc( sizeof(Filter), op->o_tmpmemctx );
+		n->f_choice = f->f_choice;
+		n->f_result = f->f_result;
+		n->f_next = NULL;
+		break;
+
+	case LDAP_FILTER_PRESENT:
+		if ( ad_inlist( f->f_desc, an )) {
+			n = op->o_tmpalloc( sizeof(Filter), op->o_tmpmemctx );
+			n->f_choice = f->f_choice;
+			n->f_desc = f->f_desc;
+			n->f_next = NULL;
+		}
+		break;
+
+	case LDAP_FILTER_EQUALITY:
+	case LDAP_FILTER_GE:
+	case LDAP_FILTER_LE:
+	case LDAP_FILTER_APPROX:
+	case LDAP_FILTER_SUBSTRINGS:
+	case LDAP_FILTER_EXT:
+		if ( !f->f_av_desc || ad_inlist( f->f_av_desc, an )) {
+			n = op->o_tmpalloc( sizeof(Filter), op->o_tmpmemctx );
+			n->f_choice = f->f_choice;
+			n->f_ava = f->f_ava;
+			n->f_next = NULL;
+		}
+		break;
+
+	case LDAP_FILTER_AND:
+	case LDAP_FILTER_OR:
+	case LDAP_FILTER_NOT: {
+		Filter **p;
+
+		n = op->o_tmpalloc( sizeof(Filter), op->o_tmpmemctx );
+		n->f_choice = f->f_choice;
+		n->f_next = NULL;
+
+		for ( p = &n->f_list, f = f->f_list; f; f = f->f_next ) {
+			*p = trans_filter_dup( op, f, an );
+			if ( !*p )
+				continue;
+			p = &(*p)->f_next;
+		}
+		/* nothing valid in this list */
+		if ( !n->f_list ) {
+			op->o_tmpfree( n, op->o_tmpmemctx );
+			return NULL;
+		}
+		/* Only 1 element in this list */
+		if ((n->f_choice & SLAPD_FILTER_MASK) != LDAP_FILTER_NOT &&
+			!n->f_list->f_next ) {
+			f = n->f_list;
+			*n = *f;
+			op->o_tmpfree( f, op->o_tmpmemctx );
+		}
+		break;
+	}
+	}
+	return n;
+}
+
+static void
+trans_filter_free( Operation *op, Filter *f )
+{
+	Filter *n, *p, *next;
+
+	f->f_choice &= SLAPD_FILTER_MASK;
+
+	switch( f->f_choice ) {
+	case LDAP_FILTER_AND:
+	case LDAP_FILTER_OR:
+	case LDAP_FILTER_NOT:
+		/* Free in reverse order */
+		n = NULL;
+		for ( p = f->f_list; p; p = next ) {
+			next = p->f_next;
+			p->f_next = n;
+			n = p;
+		}
+		for ( p = n; p; p = next ) {
+			next = p->f_next;
+			trans_filter_free( op, p );
+		}
+		break;
+	default:
+		break;
+	}
+	op->o_tmpfree( f, op->o_tmpmemctx );
+}
+
+/*
+** translucent_search()
+**	search via captive backend;
+**	override results with any local data;
+**
+*/
+
+static int translucent_search(Operation *op, SlapReply *rs) {
+	slap_overinst *on = (slap_overinst *) op->o_bd->bd_info;
+	translucent_info *ov = on->on_bi.bi_private;
+	slap_callback cb = { NULL, NULL, NULL, NULL };
+	trans_ctx tc;
+	Filter *fl, *fr;
+	struct berval fbv;
+	int rc = 0;
+
+	if ( op->o_managedsait > SLAP_CONTROL_IGNORED )
+		return SLAP_CB_CONTINUE;
+
+	Debug(LDAP_DEBUG_TRACE, "==> translucent_search: <%s> %s\n",
+		op->o_req_dn.bv_val, op->ors_filterstr.bv_val, 0);
+
+	if(ov->defer_db_open) {
+		send_ldap_error(op, rs, LDAP_UNAVAILABLE,
+			"remote DB not available");
+		return(rs->sr_err);
+	}
+
+	fr = ov->remote ? trans_filter_dup( op, op->ors_filter, ov->remote ) : NULL;
+	fl = ov->local ? trans_filter_dup( op, op->ors_filter, ov->local ) : NULL;
+	cb.sc_response = (slap_response *) translucent_search_cb;
+	cb.sc_private = &tc;
+	cb.sc_next = op->o_callback;
+
+	ov->db.be_acl = op->o_bd->be_acl;
+	tc.db = op->o_bd;
+	tc.on = on;
+	tc.orig = op->ors_filter;
+	tc.list = NULL;
+	tc.step = 0;
+	tc.slimit = op->ors_slimit;
+	tc.attrs = NULL;
+	fbv = op->ors_filterstr;
+
+	op->o_callback = &cb;
+
+	if ( fr || !fl ) {
+		tc.attrs = op->ors_attrs;
+		op->ors_slimit = SLAP_NO_LIMIT;
+		op->ors_attrs = slap_anlist_all_attributes;
+		op->o_bd = &ov->db;
+		tc.step |= RMT_SIDE;
+		if ( fl ) {
+			tc.step |= USE_LIST;
+			op->ors_filter = fr;
+			filter2bv_x( op, fr, &op->ors_filterstr );
+		}
+		rc = ov->db.bd_info->bi_op_search(op, rs);
+		if ( op->ors_attrs == slap_anlist_all_attributes )
+			op->ors_attrs = tc.attrs;
+		op->o_bd = tc.db;
+		if ( fl ) {
+			op->o_tmpfree( op->ors_filterstr.bv_val, op->o_tmpmemctx );
+		}
+	}
+	if ( fl && !rc ) {
+		tc.step |= LCL_SIDE;
+		op->ors_filter = fl;
+		filter2bv_x( op, fl, &op->ors_filterstr );
+		rc = overlay_op_walk( op, rs, op_search, on->on_info, on->on_next );
+		op->o_tmpfree( op->ors_filterstr.bv_val, op->o_tmpmemctx );
+	}
+	op->ors_filterstr = fbv;
+	op->ors_filter = tc.orig;
+	op->o_callback = cb.sc_next;
+	rs->sr_attrs = op->ors_attrs;
+	rs->sr_attr_flags = slap_attr_flags( rs->sr_attrs );
+
+	/* Send out anything remaining on the list and finish */
+	if ( tc.step & USE_LIST ) {
+		if ( tc.list ) {
+			Avlnode *av;
+
+			av = tavl_end( tc.list, TAVL_DIR_LEFT );
+			while ( av ) {
+				rs->sr_entry = av->avl_data;
+				if ( rc == LDAP_SUCCESS && LDAP_COMPARE_TRUE ==
+					test_filter( op, rs->sr_entry, op->ors_filter ))
+				{
+					rs->sr_flags = REP_ENTRY_MUSTBEFREED;
+					rc = send_search_entry( op, rs );
+				} else {
+					entry_free( rs->sr_entry );
+				}
+				av = tavl_next( av, TAVL_DIR_RIGHT );
+			}
+			tavl_free( tc.list, NULL );
+			rs->sr_flags = 0;
+			rs->sr_entry = NULL;
+		}
+		send_ldap_result( op, rs );
+	}
+
+	op->ors_slimit = tc.slimit;
+
+	/* Free in reverse order */
+	if ( fl )
+		trans_filter_free( op, fl );
+	if ( fr )
+		trans_filter_free( op, fr );
+
+	return rc;
+}
+
+
+/*
+** translucent_bind()
+**	pass bind request to captive backend;
+**
+*/
+
+static int translucent_bind(Operation *op, SlapReply *rs) {
+	slap_overinst *on = (slap_overinst *) op->o_bd->bd_info;
+	translucent_info *ov = on->on_bi.bi_private;
+	BackendDB *db;
+	slap_callback sc = { 0 }, *save_cb;
+	int rc;
+
+	Debug(LDAP_DEBUG_TRACE, "translucent_bind: <%s> method %d\n",
+		op->o_req_dn.bv_val, op->orb_method, 0);
+
+	if(ov->defer_db_open) {
+		send_ldap_error(op, rs, LDAP_UNAVAILABLE,
+			"remote DB not available");
+		return(rs->sr_err);
+	}
+
+	if (ov->bind_local) {
+		sc.sc_response = slap_null_cb;
+		save_cb = op->o_callback;
+		op->o_callback = &sc;
+	}
+
+	db = op->o_bd;
+	op->o_bd = &ov->db;
+	ov->db.be_acl = op->o_bd->be_acl;
+	rc = ov->db.bd_info->bi_op_bind(op, rs);
+	op->o_bd = db;
+
+	if (ov->bind_local) {
+		op->o_callback = save_cb;
+		if (rc != LDAP_SUCCESS) {
+			rc = SLAP_CB_CONTINUE;
+		}
+	}
+
+	return rc;
+}
+
+/*
+** translucent_connection_destroy()
+**	pass disconnect notification to captive backend;
+**
+*/
+
+static int translucent_connection_destroy(BackendDB *be, Connection *conn) {
+	slap_overinst *on = (slap_overinst *) be->bd_info;
+	translucent_info *ov = on->on_bi.bi_private;
+	int rc = 0;
+
+	Debug(LDAP_DEBUG_TRACE, "translucent_connection_destroy\n", 0, 0, 0);
+
+	rc = ov->db.bd_info->bi_connection_destroy(&ov->db, conn);
+
+	return(rc);
+}
+
+/*
+** translucent_db_config()
+**	pass config directives to captive backend;
+**	parse unrecognized directives ourselves;
+**
+*/
+
+static int translucent_db_config(
+	BackendDB	*be,
+	const char	*fname,
+	int		lineno,
+	int		argc,
+	char		**argv
+)
+{
+	slap_overinst *on = (slap_overinst *) be->bd_info;
+	translucent_info *ov = on->on_bi.bi_private;
+
+	Debug(LDAP_DEBUG_TRACE, "==> translucent_db_config: %s\n",
+	      argc ? argv[0] : "", 0, 0);
+
+	/* Something for the captive database? */
+	if ( ov->db.bd_info && ov->db.bd_info->bi_db_config )
+		return ov->db.bd_info->bi_db_config( &ov->db, fname, lineno,
+			argc, argv );
+	return SLAP_CONF_UNKNOWN;
+}
+
+/*
+** translucent_db_init()
+**	initialize the captive backend;
+**
+*/
+
+static int translucent_db_init(BackendDB *be, ConfigReply *cr) {
+	slap_overinst *on = (slap_overinst *) be->bd_info;
+	translucent_info *ov;
+
+	Debug(LDAP_DEBUG_TRACE, "==> translucent_db_init\n", 0, 0, 0);
+
+	ov = ch_calloc(1, sizeof(translucent_info));
+	on->on_bi.bi_private = ov;
+	ov->db = *be;
+	ov->db.be_private = NULL;
+	ov->defer_db_open = 1;
+
+	if ( !backend_db_init( "ldap", &ov->db, -1, NULL )) {
+		Debug( LDAP_DEBUG_CONFIG, "translucent: unable to open captive back-ldap\n", 0, 0, 0);
+		return 1;
+	}
+	SLAP_DBFLAGS(be) |= SLAP_DBFLAG_NO_SCHEMA_CHECK;
+	SLAP_DBFLAGS(be) |= SLAP_DBFLAG_NOLASTMOD;
+
+	return 0;
+}
+
+/*
+** translucent_db_open()
+**	if the captive backend has an open() method, call it;
+**
+*/
+
+static int translucent_db_open(BackendDB *be, ConfigReply *cr) {
+	slap_overinst *on = (slap_overinst *) be->bd_info;
+	translucent_info *ov = on->on_bi.bi_private;
+	int rc;
+
+	Debug(LDAP_DEBUG_TRACE, "==> translucent_db_open\n", 0, 0, 0);
+
+	/* need to inherit something from the original database... */
+	ov->db.be_def_limit = be->be_def_limit;
+	ov->db.be_limits = be->be_limits;
+	ov->db.be_acl = be->be_acl;
+	ov->db.be_dfltaccess = be->be_dfltaccess;
+
+	if ( ov->defer_db_open )
+		return 0;
+
+	rc = backend_startup_one( &ov->db, cr );
+
+	if(rc) Debug(LDAP_DEBUG_TRACE,
+		"translucent: bi_db_open() returned error %d\n", rc, 0, 0);
+
+	return(rc);
+}
+
+/*
+** translucent_db_close()
+**	if the captive backend has a close() method, call it
+**
+*/
+
+static int
+translucent_db_close( BackendDB *be, ConfigReply *cr )
+{
+	slap_overinst *on = (slap_overinst *) be->bd_info;
+	translucent_info *ov = on->on_bi.bi_private;
+	int rc = 0;
+
+	Debug(LDAP_DEBUG_TRACE, "==> translucent_db_close\n", 0, 0, 0);
+
+	if ( ov && ov->db.bd_info && ov->db.bd_info->bi_db_close ) {
+		rc = ov->db.bd_info->bi_db_close(&ov->db, NULL);
+	}
+
+	return(rc);
+}
+
+/*
+** translucent_db_destroy()
+**	if the captive backend has a db_destroy() method, call it;
+**	free any config data
+**
+*/
+
+static int
+translucent_db_destroy( BackendDB *be, ConfigReply *cr )
+{
+	slap_overinst *on = (slap_overinst *) be->bd_info;
+	translucent_info *ov = on->on_bi.bi_private;
+	int rc = 0;
+
+	Debug(LDAP_DEBUG_TRACE, "==> translucent_db_destroy\n", 0, 0, 0);
+
+	if ( ov ) {
+		if ( ov->remote )
+			anlist_free( ov->remote, 1, NULL );
+		if ( ov->local )
+			anlist_free( ov->local, 1, NULL );
+		if ( ov->db.be_private != NULL ) {
+			backend_stopdown_one( &ov->db );
+		}
+
+		ldap_pvt_thread_mutex_destroy( &ov->db.be_pcl_mutex );
+		ch_free(ov);
+		on->on_bi.bi_private = NULL;
+	}
+
+	return(rc);
+}
+
+/*
+** translucent_initialize()
+**	initialize the slap_overinst with our entry points;
+**
+*/
+
+int translucent_initialize() {
+
+	int rc;
+
+	/* olcDatabaseDummy is defined in slapd, and Windows
+	   will not let us initialize a struct element with a data pointer
+	   from another library, so we have to initialize this element
+	   "by hand".  */
+	translucentocs[1].co_table = olcDatabaseDummy;
+
+	Debug(LDAP_DEBUG_TRACE, "==> translucent_initialize\n", 0, 0, 0);
+
+	translucent.on_bi.bi_type	= "translucent";
+	translucent.on_bi.bi_db_init	= translucent_db_init;
+	translucent.on_bi.bi_db_config	= translucent_db_config;
+	translucent.on_bi.bi_db_open	= translucent_db_open;
+	translucent.on_bi.bi_db_close	= translucent_db_close;
+	translucent.on_bi.bi_db_destroy	= translucent_db_destroy;
+	translucent.on_bi.bi_op_bind	= translucent_bind;
+	translucent.on_bi.bi_op_add	= translucent_add;
+	translucent.on_bi.bi_op_modify	= translucent_modify;
+	translucent.on_bi.bi_op_modrdn	= translucent_modrdn;
+	translucent.on_bi.bi_op_delete	= translucent_delete;
+	translucent.on_bi.bi_op_search	= translucent_search;
+	translucent.on_bi.bi_op_compare	= translucent_compare;
+	translucent.on_bi.bi_connection_destroy = translucent_connection_destroy;
+	translucent.on_bi.bi_extended	= translucent_exop;
+
+	translucent.on_bi.bi_cf_ocs = translucentocs;
+	rc = config_register_schema ( translucentcfg, translucentocs );
+	if ( rc ) return rc;
+
+	return(overlay_register(&translucent));
+}
+
+#if SLAPD_OVER_TRANSLUCENT == SLAPD_MOD_DYNAMIC && defined(PIC)
+int init_module(int argc, char *argv[]) {
+	return translucent_initialize();
+}
+#endif
+
+#endif /* SLAPD_OVER_TRANSLUCENT */