allow proxies to filter out search references (ITS#5593)

[openldap] / servers / slapd / back-ldap / compare.c

diff --git a/servers/slapd/back-ldap/compare.c b/servers/slapd/back-ldap/compare.c
index 26a1b8d58aabba9fcf61924f58b839bd18818c98..02666f9bb379aaa58d335fbd20c7d649196a71cb 100644 (file)
--- a/servers/slapd/back-ldap/compare.c
+++ b/servers/slapd/back-ldap/compare.c
@@ -1,24 +1,24 @@
 /* compare.c - ldap backend compare function */
-
-/*
- * Copyright 1999, Howard Chu, All rights reserved. <hyc@highlandsun.com>
- * 
- * Permission is granted to anyone to use this software for any purpose
- * on any computer system, and to alter it and redistribute it, subject
- * to the following restrictions:
- * 
- * 1. The author is not responsible for the consequences of use of this
- *    software, no matter how awful, even if they arise from flaws in it.
- * 
- * 2. The origin of this software must not be misrepresented, either by
- *    explicit claim or by omission.  Since few users ever read sources,
- *    credits should appear in the documentation.
- * 
- * 3. Altered versions must be plainly marked as such, and must not be
- *    misrepresented as being the original software.  Since few users
- *    ever read sources, credits should appear in the documentation.
- * 
- * 4. This notice may not be removed or altered.
+/* $OpenLDAP$ */
+/* This work is part of OpenLDAP Software <http://www.openldap.org/>.
+ *
+ * Copyright 2003-2008 The OpenLDAP Foundation.
+ * Portions Copyright 1999-2003 Howard Chu.
+ * Portions Copyright 2000-2003 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>.
+ */
+/* ACKNOWLEDGEMENTS:
+ * This work was initially developed by the Howard Chu for inclusion
+ * in OpenLDAP Software and subsequently enhanced by Pierangelo
+ * Masarati.
  */
 
 #include "portable.h"
@@ -33,26 +33,52 @@
 
 int
 ldap_back_compare(
-    Backend    *be,
-    Connection *conn,
-    Operation  *op,
-    char       *dn,
-    Ava                *ava
-)
+               Operation       *op,
+               SlapReply       *rs )
 {
-       struct ldapinfo *li = (struct ldapinfo *) be->be_private;
-       struct ldapconn *lc;
+       ldapinfo_t              *li = (ldapinfo_t *)op->o_bd->be_private;
+
+       ldapconn_t              *lc = NULL;
+       ber_int_t               msgid;
+       ldap_back_send_t        retrying = LDAP_BACK_RETRYING;
+       LDAPControl             **ctrls = NULL;
+       int                     rc = LDAP_SUCCESS;
+
+       if ( !ldap_back_dobind( &lc, op, rs, LDAP_BACK_SENDERR ) ) {
+               lc = NULL;
+               goto cleanup;
+       }
+
+retry:
+       ctrls = op->o_ctrls;
+       rc = ldap_back_controls_add( op, rs, lc, &ctrls );
+       if ( rc != LDAP_SUCCESS ) {
+               send_ldap_result( op, rs );
+               goto cleanup;
+       }
 
-       lc = ldap_back_getconn(li, conn, op);
-       if (!lc)
-               return( -1 );
+       rs->sr_err = ldap_compare_ext( lc->lc_ld, op->o_req_dn.bv_val,
+                       op->orc_ava->aa_desc->ad_cname.bv_val,
+                       &op->orc_ava->aa_value, 
+                       ctrls, NULL, &msgid );
+       rc = ldap_back_op_result( lc, op, rs, msgid,
+               li->li_timeout[ SLAP_OP_COMPARE ],
+               ( LDAP_BACK_SENDRESULT | retrying ) );
+       if ( rc == LDAP_UNAVAILABLE && retrying ) {
+               retrying &= ~LDAP_BACK_RETRYING;
+               if ( ldap_back_retry( &lc, op, rs, LDAP_BACK_SENDERR ) ) {
+                       /* if the identity changed, there might be need to re-authz */
+                       (void)ldap_back_controls_free( op, rs, &ctrls );
+                       goto retry;
+               }
+       }
 
-       if (!lc->bound) {
-               ldap_back_dobind(lc, op);
-               if (!lc->bound)
-                       return( -1 );
+cleanup:
+       (void)ldap_back_controls_free( op, rs, &ctrls );
+       
+       if ( lc != NULL ) {
+               ldap_back_release_conn( li, lc );
        }
 
-       ldap_compare_s( lc->ld, dn, ava->ava_type, ava->ava_value.bv_val );
-       return( ldap_back_op_result( lc, op ) );
+       return rs->sr_err;
 }