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-rw-r--r--servers/slapd/back-mdb/compare.c142
1 files changed, 142 insertions, 0 deletions
diff --git a/servers/slapd/back-mdb/compare.c b/servers/slapd/back-mdb/compare.c
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index 0000000..9da3772
--- /dev/null
+++ b/servers/slapd/back-mdb/compare.c
@@ -0,0 +1,142 @@
+/* compare.c - mdb backend compare routine */
+/* $OpenLDAP$ */
+/* This work is part of OpenLDAP Software <http://www.openldap.org/>.
+ *
+ * Copyright 2000-2021 The OpenLDAP Foundation.
+ * 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"
+
+#include <stdio.h>
+#include <ac/string.h>
+
+#include "back-mdb.h"
+
+int
+mdb_compare( Operation *op, SlapReply *rs )
+{
+ struct mdb_info *mdb = (struct mdb_info *) op->o_bd->be_private;
+ Entry *e = NULL;
+ int manageDSAit = get_manageDSAit( op );
+
+ MDB_txn *rtxn;
+ mdb_op_info opinfo = {{{0}}}, *moi = &opinfo;
+
+ rs->sr_err = mdb_opinfo_get(op, mdb, 1, &moi);
+ switch(rs->sr_err) {
+ case 0:
+ break;
+ default:
+ send_ldap_error( op, rs, LDAP_OTHER, "internal error" );
+ return rs->sr_err;
+ }
+
+ rtxn = moi->moi_txn;
+
+ /* get entry */
+ rs->sr_err = mdb_dn2entry( op, rtxn, NULL, &op->o_req_ndn, &e, NULL, 1 );
+ switch( rs->sr_err ) {
+ case MDB_NOTFOUND:
+ case 0:
+ break;
+ case LDAP_BUSY:
+ rs->sr_text = "ldap server busy";
+ goto return_results;
+ default:
+ rs->sr_err = LDAP_OTHER;
+ rs->sr_text = "internal error";
+ goto return_results;
+ }
+
+ if ( rs->sr_err == MDB_NOTFOUND ) {
+ if ( e != NULL ) {
+ /* return referral only if "disclose" is granted on the object */
+ if ( ! access_allowed( op, e, slap_schema.si_ad_entry,
+ NULL, ACL_DISCLOSE, NULL ) )
+ {
+ rs->sr_err = LDAP_NO_SUCH_OBJECT;
+
+ } else {
+ rs->sr_matched = ch_strdup( e->e_dn );
+ if ( is_entry_referral( e )) {
+ BerVarray ref = get_entry_referrals( op, e );
+ rs->sr_ref = referral_rewrite( ref, &e->e_name,
+ &op->o_req_dn, LDAP_SCOPE_DEFAULT );
+ ber_bvarray_free( ref );
+ } else {
+ rs->sr_ref = NULL;
+ }
+ rs->sr_err = LDAP_REFERRAL;
+ }
+ mdb_entry_return( op, e );
+ e = NULL;
+
+ } else {
+ rs->sr_ref = referral_rewrite( default_referral,
+ NULL, &op->o_req_dn, LDAP_SCOPE_DEFAULT );
+ rs->sr_err = rs->sr_ref ? LDAP_REFERRAL : LDAP_NO_SUCH_OBJECT;
+ }
+
+ rs->sr_flags = REP_MATCHED_MUSTBEFREED | REP_REF_MUSTBEFREED;
+ send_ldap_result( op, rs );
+ goto done;
+ }
+
+ if (!manageDSAit && is_entry_referral( e ) ) {
+ /* return referral only if "disclose" is granted on the object */
+ if ( !access_allowed( op, e, slap_schema.si_ad_entry,
+ NULL, ACL_DISCLOSE, NULL ) )
+ {
+ rs->sr_err = LDAP_NO_SUCH_OBJECT;
+ } else {
+ /* entry is a referral, don't allow compare */
+ rs->sr_ref = get_entry_referrals( op, e );
+ rs->sr_err = LDAP_REFERRAL;
+ rs->sr_matched = e->e_name.bv_val;
+ }
+
+ Debug( LDAP_DEBUG_TRACE, "entry is referral\n", 0, 0, 0 );
+
+ send_ldap_result( op, rs );
+
+ ber_bvarray_free( rs->sr_ref );
+ rs->sr_ref = NULL;
+ rs->sr_matched = NULL;
+ goto done;
+ }
+
+ rs->sr_err = slap_compare_entry( op, e, op->orc_ava );
+
+return_results:
+ send_ldap_result( op, rs );
+
+ switch ( rs->sr_err ) {
+ case LDAP_COMPARE_FALSE:
+ case LDAP_COMPARE_TRUE:
+ rs->sr_err = LDAP_SUCCESS;
+ break;
+ }
+
+done:
+ if ( moi == &opinfo ) {
+ mdb_txn_reset( moi->moi_txn );
+ LDAP_SLIST_REMOVE( &op->o_extra, &moi->moi_oe, OpExtra, oe_next );
+ } else {
+ moi->moi_ref--;
+ }
+ /* free entry */
+ if ( e != NULL ) {
+ mdb_entry_return( op, e );
+ }
+
+ return rs->sr_err;
+}