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 2000-2005 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 #include "external.h"
  24
  25 int
  26 bdb_compare( Operation *op, SlapReply *rs )
  27 {
  28         struct bdb_info *bdb = (struct bdb_info *) op->o_bd->be_private;
  29         Entry           *e = NULL;
  30         EntryInfo       *ei;
  31         Attribute       *a;
  32         int             manageDSAit = get_manageDSAit( op );
  33
  34         u_int32_t       locker;
  35         DB_LOCK         lock;
  36
  37         rs->sr_err = LOCK_ID(bdb->bi_dbenv, &locker);
  38         switch(rs->sr_err) {
  39         case 0:
  40                 break;
  41         default:
  42                 send_ldap_error( op, rs, LDAP_OTHER, "internal error" );
  43                 return rs->sr_err;
  44         }
  45
  46 dn2entry_retry:
  47         /* get entry */
  48         rs->sr_err = bdb_dn2entry( op, NULL, &op->o_req_ndn, &ei, 1, locker, &lock );
  49
  50         switch( rs->sr_err ) {
  51         case DB_NOTFOUND:
  52         case 0:
  53                 break;
  54         case LDAP_BUSY:
  55                 rs->sr_text = "ldap server busy";
  56                 goto return_results;
  57         case DB_LOCK_DEADLOCK:
  58         case DB_LOCK_NOTGRANTED:
  59                 goto dn2entry_retry;
  60         default:
  61                 rs->sr_err = LDAP_OTHER;
  62                 rs->sr_text = "internal error";
  63                 goto return_results;
  64         }
  65
  66         e = ei->bei_e;
  67         if ( rs->sr_err == DB_NOTFOUND ) {
  68                 if ( e != NULL ) {
  69                         rs->sr_matched = ch_strdup( e->e_dn );
  70                         rs->sr_ref = is_entry_referral( e )
  71                                 ? get_entry_referrals( op, e )
  72                                 : NULL;
  73                         bdb_cache_return_entry_r( bdb->bi_dbenv, &bdb->bi_cache, e, &lock );
  74                         e = NULL;
  75
  76                 } else {
  77                         rs->sr_ref = referral_rewrite( default_referral,
  78                                 NULL, &op->o_req_dn, LDAP_SCOPE_DEFAULT );
  79                 }
  80
  81                 rs->sr_err = LDAP_REFERRAL;
  82                 send_ldap_result( op, rs );
  83
  84                 ber_bvarray_free( rs->sr_ref );
  85                 free( (char *)rs->sr_matched );
  86                 rs->sr_ref = NULL;
  87                 rs->sr_matched = NULL;
  88
  89                 goto done;
  90         }
  91
  92         if (!manageDSAit && is_entry_referral( e ) ) {
  93                 /* entry is a referral, don't allow add */
  94                 rs->sr_ref = get_entry_referrals( op, e );
  95
  96 #ifdef NEW_LOGGING
  97                 LDAP_LOG ( OPERATION, DETAIL1,
  98                         "bdb_compare: entry is referral\n", 0, 0, 0 );
  99 #else
 100                 Debug( LDAP_DEBUG_TRACE, "entry is referral\n", 0,
 101                         0, 0 );
 102 #endif
 103
 104                 rs->sr_err = LDAP_REFERRAL;
 105                 rs->sr_matched = e->e_name.bv_val;
 106                 send_ldap_result( op, rs );
 107
 108                 ber_bvarray_free( rs->sr_ref );
 109                 rs->sr_ref = NULL;
 110                 rs->sr_matched = NULL;
 111                 goto done;
 112         }
 113
 114         if ( get_assert( op ) &&
 115                 ( test_filter( op, e, get_assertion( op )) != LDAP_COMPARE_TRUE ))
 116         {
 117                 rs->sr_err = LDAP_ASSERTION_FAILED;
 118                 goto return_results;
 119         }
 120
 121         rs->sr_err = access_allowed( op, e, op->oq_compare.rs_ava->aa_desc,
 122                 &op->oq_compare.rs_ava->aa_value, ACL_COMPARE, NULL );
 123         if ( ! rs->sr_err ) {
 124                 rs->sr_err = LDAP_INSUFFICIENT_ACCESS;
 125                 goto return_results;
 126         }
 127
 128         rs->sr_err = LDAP_NO_SUCH_ATTRIBUTE;
 129
 130         for(a = attrs_find( e->e_attrs, op->oq_compare.rs_ava->aa_desc );
 131                 a != NULL;
 132                 a = attrs_find( a->a_next, op->oq_compare.rs_ava->aa_desc ))
 133         {
 134                 rs->sr_err = LDAP_COMPARE_FALSE;
 135
 136                 if ( value_find_ex( op->oq_compare.rs_ava->aa_desc,
 137                         SLAP_MR_ATTRIBUTE_VALUE_NORMALIZED_MATCH |
 138                                 SLAP_MR_ASSERTED_VALUE_NORMALIZED_MATCH,
 139                         a->a_nvals, &op->oq_compare.rs_ava->aa_value, op->o_tmpmemctx ) == 0 )
 140                 {
 141                         rs->sr_err = LDAP_COMPARE_TRUE;
 142                         break;
 143                 }
 144         }
 145
 146 return_results:
 147         send_ldap_result( op, rs );
 148
 149         if( rs->sr_err == LDAP_COMPARE_FALSE || rs->sr_err == LDAP_COMPARE_TRUE ) {
 150                 rs->sr_err = LDAP_SUCCESS;
 151         }
 152
 153 done:
 154         /* free entry */
 155         if( e != NULL ) {
 156                 bdb_cache_return_entry_r( bdb->bi_dbenv, &bdb->bi_cache, e, &lock );
 157         }
 158
 159         LOCK_ID_FREE ( bdb->bi_dbenv, locker );
 160
 161         return rs->sr_err;
 162 }