external/bsd/openldap/dist/servers/slapd/back-ldap/compare.c

   1 /* compare.c - ldap backend compare function */
   2 /* $OpenLDAP: pkg/ldap/servers/slapd/back-ldap/compare.c,v 1.60.2.5 2008/02/11 23:26:46 kurt Exp $ */
   3 /* This work is part of OpenLDAP Software <http://www.openldap.org/>.
   4  *
   5  * Copyright 2003-2008 The OpenLDAP Foundation.
   6  * Portions Copyright 1999-2003 Howard Chu.
   7  * Portions Copyright 2000-2003 Pierangelo Masarati.
   8  * All rights reserved.
   9  *
  10  * Redistribution and use in source and binary forms, with or without
  11  * modification, are permitted only as authorized by the OpenLDAP
  12  * Public License.
  13  *
  14  * A copy of this license is available in the file LICENSE in the
  15  * top-level directory of the distribution or, alternatively, at
  16  * <http://www.OpenLDAP.org/license.html>.
  17  */
  18 /* ACKNOWLEDGEMENTS:
  19  * This work was initially developed by the Howard Chu for inclusion
  20  * in OpenLDAP Software and subsequently enhanced by Pierangelo
  21  * Masarati.
  22  */
  23
  24 #include "portable.h"
  25
  26 #include <stdio.h>
  27
  28 #include <ac/string.h>
  29 #include <ac/socket.h>
  30
  31 #include "slap.h"
  32 #include "back-ldap.h"
  33
  34 int
  35 ldap_back_compare(
  36                 Operation       *op,
  37                 SlapReply       *rs )
  38 {
  39         ldapinfo_t              *li = (ldapinfo_t *)op->o_bd->be_private;
  40
  41         ldapconn_t              *lc = NULL;
  42         ber_int_t               msgid;
  43         ldap_back_send_t        retrying = LDAP_BACK_RETRYING;
  44         LDAPControl             **ctrls = NULL;
  45         int                     rc = LDAP_SUCCESS;
  46
  47         if ( !ldap_back_dobind( &lc, op, rs, LDAP_BACK_SENDERR ) ) {
  48                 lc = NULL;
  49                 goto cleanup;
  50         }
  51
  52 retry:
  53         ctrls = op->o_ctrls;
  54         rc = ldap_back_controls_add( op, rs, lc, &ctrls );
  55         if ( rc != LDAP_SUCCESS ) {
  56                 send_ldap_result( op, rs );
  57                 goto cleanup;
  58         }
  59
  60         rs->sr_err = ldap_compare_ext( lc->lc_ld, op->o_req_dn.bv_val,
  61                         op->orc_ava->aa_desc->ad_cname.bv_val,
  62                         &op->orc_ava->aa_value,
  63                         ctrls, NULL, &msgid );
  64         rc = ldap_back_op_result( lc, op, rs, msgid,
  65                 li->li_timeout[ SLAP_OP_COMPARE ],
  66                 ( LDAP_BACK_SENDRESULT | retrying ) );
  67         if ( rc == LDAP_UNAVAILABLE && retrying ) {
  68                 retrying &= ~LDAP_BACK_RETRYING;
  69                 if ( ldap_back_retry( &lc, op, rs, LDAP_BACK_SENDERR ) ) {
  70                         /* if the identity changed, there might be need to re-authz */
  71                         (void)ldap_back_controls_free( op, rs, &ctrls );
  72                         goto retry;
  73                 }
  74         }
  75
  76 cleanup:
  77         (void)ldap_back_controls_free( op, rs, &ctrls );
  78
  79         if ( lc != NULL ) {
  80                 ldap_back_release_conn( li, lc );
  81         }
  82
  83         return rs->sr_err;
  84 }