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

   1 /* compare.c - ldbm backend compare routine */
   2 /* $OpenLDAP$ */
   3 /* This work is part of OpenLDAP Software <http://www.openldap.org/>.
   4  *
   5  * Copyright 1998-2007 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
  21 #include <ac/socket.h>
  22 #include <ac/string.h>
  23
  24 #include "slap.h"
  25 #include "back-ldbm.h"
  26 #include "proto-back-ldbm.h"
  27
  28 int
  29 ldbm_back_compare(
  30         Operation       *op,
  31         SlapReply       *rs )
  32 {
  33         struct ldbminfo *li = (struct ldbminfo *) op->o_bd->be_private;
  34         Entry           *matched;
  35         Entry           *e;
  36         Attribute       *a;
  37         int             manageDSAit = get_manageDSAit( op );
  38
  39         rs->sr_matched = NULL;
  40         rs->sr_ref = NULL;
  41
  42         /* grab giant lock for reading */
  43         ldap_pvt_thread_rdwr_rlock(&li->li_giant_rwlock);
  44
  45         /* get entry with reader lock */
  46         e = dn2entry_r( op->o_bd, &op->o_req_ndn, &matched );
  47         if ( e == NULL ) {
  48                 if ( matched != NULL ) {
  49                         rs->sr_matched = ch_strdup( matched->e_dn );
  50                         rs->sr_ref = is_entry_referral( matched )
  51                                 ? get_entry_referrals( op, matched )
  52                                 : NULL;
  53                         cache_return_entry_r( &li->li_cache, matched );
  54                 } else {
  55                         rs->sr_ref = referral_rewrite( default_referral,
  56                                 NULL, &op->o_req_dn, LDAP_SCOPE_DEFAULT );
  57                 }
  58
  59                 rs->sr_err = LDAP_REFERRAL;
  60                 goto return_results;
  61         }
  62
  63         if ( !manageDSAit && is_entry_referral( e ) ) {
  64                 struct berval   bv;
  65
  66                 /* entry is a referral, don't allow add */
  67                 rs->sr_ref = get_entry_referrals( op, e );
  68
  69                 Debug( LDAP_DEBUG_TRACE, "entry is referral\n", 0,
  70                     0, 0 );
  71
  72
  73                 rs->sr_err = LDAP_REFERRAL;
  74                 ber_dupbv_x( &bv, &e->e_name, op->o_tmpmemctx );
  75                 rs->sr_matched = bv.bv_val;
  76
  77                 goto return_results;
  78         }
  79
  80         if ( ! access_allowed( op, e,
  81                 op->oq_compare.rs_ava->aa_desc, &op->oq_compare.rs_ava->aa_value, ACL_COMPARE, NULL ) )
  82         {
  83                 send_ldap_error( op, rs, LDAP_INSUFFICIENT_ACCESS,
  84                         NULL );
  85                 goto return_results;
  86         }
  87
  88         rs->sr_err = LDAP_NO_SUCH_ATTRIBUTE;
  89
  90         for(a = attrs_find( e->e_attrs, op->oq_compare.rs_ava->aa_desc );
  91                 a != NULL;
  92                 a = attrs_find( a->a_next, op->oq_compare.rs_ava->aa_desc ))
  93         {
  94                 rs->sr_err = LDAP_COMPARE_FALSE;
  95
  96                 if ( value_find_ex( op->oq_compare.rs_ava->aa_desc,
  97                         SLAP_MR_ATTRIBUTE_VALUE_NORMALIZED_MATCH |
  98                                 SLAP_MR_ASSERTED_VALUE_NORMALIZED_MATCH,
  99                         a->a_nvals, &op->oq_compare.rs_ava->aa_value,
 100                         op->o_tmpmemctx ) == 0 )
 101                 {
 102                         rs->sr_err = LDAP_COMPARE_TRUE;
 103                         break;
 104                 }
 105         }
 106
 107 return_results:;
 108         if ( e ) cache_return_entry_r( &li->li_cache, e );
 109         ldap_pvt_thread_rdwr_runlock(&li->li_giant_rwlock);
 110
 111         send_ldap_result( op, rs );
 112
 113         switch ( rs->sr_err ) {
 114         case LDAP_COMPARE_FALSE:
 115         case LDAP_COMPARE_TRUE:
 116                 rs->sr_err = LDAP_SUCCESS;
 117                 break;
 118         }
 119
 120         if ( rs->sr_ref != NULL ) {
 121                 ber_bvarray_free( rs->sr_ref );
 122                 rs->sr_ref = NULL;
 123         }
 124
 125         if ( rs->sr_matched != NULL ) {
 126                 op->o_tmpfree( (char *)rs->sr_matched, op->o_tmpmemctx );
 127                 rs->sr_matched = NULL;
 128         }
 129
 130         return rs->sr_err;
 131 }