git.sur5r.net Git - openldap/blob - servers/slapd/back-bdb/compare.c

   1 /* compare.c - bdb backend compare routine */
   2 /* $OpenLDAP$ */
   3 /* This work is part of OpenLDAP Software <http://www.openldap.org/>.
   4  *
   5  * Copyright 2000-2017 The OpenLDAP Foundation.
   6  * All rights reserved.
   7  *
   8  * Redistribution and use in source and binary forms, with or without
   9  * modification, are permitted only as authorized by the OpenLDAP
  10  * Public License.
  11  *
  12  * A copy of this license is available in the file LICENSE in the
  13  * top-level directory of the distribution or, alternatively, at
  14  * <http://www.OpenLDAP.org/license.html>.
  15  */
  16
  17 #include "portable.h"
  18
  19 #include <stdio.h>
  20 #include <ac/string.h>
  21
  22 #include "back-bdb.h"
  23
  24 int
  25 bdb_compare( Operation *op, SlapReply *rs )
  26 {
  27         struct bdb_info *bdb = (struct bdb_info *) op->o_bd->be_private;
  28         Entry           *e = NULL;
  29         EntryInfo       *ei;
  30         int             manageDSAit = get_manageDSAit( op );
  31
  32         DB_TXN          *rtxn;
  33         DB_LOCK         lock;
  34
  35         rs->sr_err = bdb_reader_get(op, bdb->bi_dbenv, &rtxn);
  36         switch(rs->sr_err) {
  37         case 0:
  38                 break;
  39         default:
  40                 send_ldap_error( op, rs, LDAP_OTHER, "internal error" );
  41                 return rs->sr_err;
  42         }
  43
  44 dn2entry_retry:
  45         /* get entry */
  46         rs->sr_err = bdb_dn2entry( op, rtxn, &op->o_req_ndn, &ei, 1,
  47                 &lock );
  48
  49         switch( rs->sr_err ) {
  50         case DB_NOTFOUND:
  51         case 0:
  52                 break;
  53         case LDAP_BUSY:
  54                 rs->sr_text = "ldap server busy";
  55                 goto return_results;
  56         case DB_LOCK_DEADLOCK:
  57         case DB_LOCK_NOTGRANTED:
  58                 goto dn2entry_retry;
  59         default:
  60                 rs->sr_err = LDAP_OTHER;
  61                 rs->sr_text = "internal error";
  62                 goto return_results;
  63         }
  64
  65         e = ei->bei_e;
  66         if ( rs->sr_err == DB_NOTFOUND ) {
  67                 if ( e != NULL ) {
  68                         /* return referral only if "disclose" is granted on the object */
  69                         if ( ! access_allowed( op, e, slap_schema.si_ad_entry,
  70                                 NULL, ACL_DISCLOSE, NULL ) )
  71                         {
  72                                 rs->sr_err = LDAP_NO_SUCH_OBJECT;
  73
  74                         } else {
  75                                 rs->sr_matched = ch_strdup( e->e_dn );
  76                                 rs->sr_ref = is_entry_referral( e )
  77                                         ? get_entry_referrals( op, e )
  78                                         : NULL;
  79                                 rs->sr_err = LDAP_REFERRAL;
  80                         }
  81
  82                         bdb_cache_return_entry_r( bdb, e, &lock );
  83                         e = NULL;
  84
  85                 } else {
  86                         rs->sr_ref = referral_rewrite( default_referral,
  87                                 NULL, &op->o_req_dn, LDAP_SCOPE_DEFAULT );
  88                         rs->sr_err = rs->sr_ref ? LDAP_REFERRAL : LDAP_NO_SUCH_OBJECT;
  89                 }
  90
  91                 send_ldap_result( op, rs );
  92
  93                 ber_bvarray_free( rs->sr_ref );
  94                 free( (char *)rs->sr_matched );
  95                 rs->sr_ref = NULL;
  96                 rs->sr_matched = NULL;
  97
  98                 goto done;
  99         }
 100
 101         if (!manageDSAit && is_entry_referral( e ) ) {
 102                 /* return referral only if "disclose" is granted on the object */
 103                 if ( !access_allowed( op, e, slap_schema.si_ad_entry,
 104                         NULL, ACL_DISCLOSE, NULL ) )
 105                 {
 106                         rs->sr_err = LDAP_NO_SUCH_OBJECT;
 107                 } else {
 108                         /* entry is a referral, don't allow compare */
 109                         rs->sr_ref = get_entry_referrals( op, e );
 110                         rs->sr_err = LDAP_REFERRAL;
 111                         rs->sr_matched = e->e_name.bv_val;
 112                 }
 113
 114                 Debug( LDAP_DEBUG_TRACE, "entry is referral\n", 0, 0, 0 );
 115
 116                 send_ldap_result( op, rs );
 117
 118                 ber_bvarray_free( rs->sr_ref );
 119                 rs->sr_ref = NULL;
 120                 rs->sr_matched = NULL;
 121                 goto done;
 122         }
 123
 124         rs->sr_err = slap_compare_entry( op, e, op->orc_ava );
 125
 126 return_results:
 127         send_ldap_result( op, rs );
 128
 129         switch ( rs->sr_err ) {
 130         case LDAP_COMPARE_FALSE:
 131         case LDAP_COMPARE_TRUE:
 132                 rs->sr_err = LDAP_SUCCESS;
 133                 break;
 134         }
 135
 136 done:
 137         /* free entry */
 138         if ( e != NULL ) {
 139                 bdb_cache_return_entry_r( bdb, e, &lock );
 140         }
 141
 142         return rs->sr_err;
 143 }