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/* $OpenLDAP$ */
/* This work is part of OpenLDAP Software <http://www.openldap.org/>.
*
* Copyright 1999-2021 The OpenLDAP Foundation.
* Portions Copyright 2001-2003 Pierangelo Masarati.
* Portions Copyright 1999-2003 Howard Chu.
* All rights reserved.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted only as authorized by the OpenLDAP
* Public License.
*
* A copy of this license is available in the file LICENSE in the
* top-level directory of the distribution or, alternatively, at
* <http://www.OpenLDAP.org/license.html>.
*/
/* ACKNOWLEDGEMENTS:
* This work was initially developed by the Howard Chu for inclusion
* in OpenLDAP Software and subsequently enhanced by Pierangelo
* Masarati.
*/
#include "portable.h"
#include <stdio.h>
#include <ac/string.h>
#include <ac/socket.h>
#include "slap.h"
#include "../back-ldap/back-ldap.h"
#include "back-meta.h"
int
meta_back_compare( Operation *op, SlapReply *rs )
{
metainfo_t *mi = ( metainfo_t * )op->o_bd->be_private;
metatarget_t *mt;
metaconn_t *mc;
int rc = 0;
int candidate = -1;
struct berval mdn = BER_BVNULL;
dncookie dc;
struct berval mapped_attr = op->orc_ava->aa_desc->ad_cname;
struct berval mapped_value = op->orc_ava->aa_value;
int msgid;
ldap_back_send_t retrying = LDAP_BACK_RETRYING;
LDAPControl **ctrls = NULL;
mc = meta_back_getconn( op, rs, &candidate, LDAP_BACK_SENDERR );
if ( !mc || !meta_back_dobind( op, rs, mc, LDAP_BACK_SENDERR ) ) {
return rs->sr_err;
}
assert( mc->mc_conns[ candidate ].msc_ld != NULL );
/*
* Rewrite the modify dn, if needed
*/
mt = mi->mi_targets[ candidate ];
dc.target = mt;
dc.conn = op->o_conn;
dc.rs = rs;
dc.ctx = "compareDN";
switch ( ldap_back_dn_massage( &dc, &op->o_req_dn, &mdn ) ) {
case LDAP_UNWILLING_TO_PERFORM:
rc = 1;
goto cleanup;
default:
break;
}
/*
* if attr is objectClass, try to remap the value
*/
if ( op->orc_ava->aa_desc == slap_schema.si_ad_objectClass ) {
ldap_back_map( &mt->mt_rwmap.rwm_oc,
&op->orc_ava->aa_value,
&mapped_value, BACKLDAP_MAP );
if ( BER_BVISNULL( &mapped_value ) || BER_BVISEMPTY( &mapped_value ) ) {
goto cleanup;
}
/*
* else try to remap the attribute
*/
} else {
ldap_back_map( &mt->mt_rwmap.rwm_at,
&op->orc_ava->aa_desc->ad_cname,
&mapped_attr, BACKLDAP_MAP );
if ( BER_BVISNULL( &mapped_attr ) || BER_BVISEMPTY( &mapped_attr ) ) {
goto cleanup;
}
if ( op->orc_ava->aa_desc->ad_type->sat_syntax == slap_schema.si_syn_distinguishedName )
{
dc.ctx = "compareAttrDN";
switch ( ldap_back_dn_massage( &dc, &op->orc_ava->aa_value, &mapped_value ) )
{
case LDAP_UNWILLING_TO_PERFORM:
rc = 1;
goto cleanup;
default:
break;
}
}
}
retry:;
ctrls = op->o_ctrls;
rc = meta_back_controls_add( op, rs, mc, candidate, &ctrls );
if ( rc != LDAP_SUCCESS ) {
send_ldap_result( op, rs );
goto cleanup;
}
rs->sr_err = ldap_compare_ext( mc->mc_conns[ candidate ].msc_ld, mdn.bv_val,
mapped_attr.bv_val, &mapped_value,
ctrls, NULL, &msgid );
rs->sr_err = meta_back_op_result( mc, op, rs, candidate, msgid,
mt->mt_timeout[ SLAP_OP_COMPARE ], ( LDAP_BACK_SENDRESULT | retrying ) );
if ( rs->sr_err == LDAP_UNAVAILABLE && retrying ) {
retrying &= ~LDAP_BACK_RETRYING;
if ( meta_back_retry( op, rs, &mc, candidate, LDAP_BACK_SENDERR ) ) {
/* if the identity changed, there might be need to re-authz */
(void)mi->mi_ldap_extra->controls_free( op, rs, &ctrls );
goto retry;
}
}
cleanup:;
(void)mi->mi_ldap_extra->controls_free( op, rs, &ctrls );
if ( mdn.bv_val != op->o_req_dn.bv_val ) {
free( mdn.bv_val );
}
if ( op->orc_ava->aa_value.bv_val != mapped_value.bv_val ) {
free( mapped_value.bv_val );
}
if ( mc ) {
meta_back_release_conn( mi, mc );
}
return rs->sr_err;
}
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