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

   1 /* compare.c - bdb backend compare routine */
   2 /* $OpenLDAP$ */
   3 /*
   4  * Copyright 1998-2003 The OpenLDAP Foundation, All Rights Reserved.
   5  * COPYING RESTRICTIONS APPLY, see COPYRIGHT file
   6  */
   7
   8 #include "portable.h"
   9
  10 #include <stdio.h>
  11 #include <ac/string.h>
  12
  13 #include "back-bdb.h"
  14 #include "external.h"
  15
  16 int
  17 bdb_compare( Operation *op, SlapReply *rs )
  18 {
  19         struct bdb_info *bdb = (struct bdb_info *) op->o_bd->be_private;
  20         Entry           *matched;
  21         Entry           *e;
  22         Attribute       *a;
  23         int             manageDSAit = get_manageDSAit( op );
  24
  25         u_int32_t       locker;
  26         DB_LOCK         lock;
  27
  28         rs->sr_err = LOCK_ID(bdb->bi_dbenv, &locker);
  29         switch(rs->sr_err) {
  30         case 0:
  31                 break;
  32         default:
  33                 send_ldap_error( op, rs, LDAP_OTHER, "internal error" );
  34                 return rs->sr_err;
  35         }
  36
  37 dn2entry_retry:
  38         /* get entry */
  39         rs->sr_err = bdb_dn2entry_r( op->o_bd, NULL, &op->o_req_ndn, &e, &matched, 0, locker, &lock );
  40
  41         switch( rs->sr_err ) {
  42         case DB_NOTFOUND:
  43         case 0:
  44                 break;
  45         case LDAP_BUSY:
  46                 rs->sr_text = "ldap server busy";
  47                 goto return_results;
  48         case DB_LOCK_DEADLOCK:
  49         case DB_LOCK_NOTGRANTED:
  50                 goto dn2entry_retry;
  51         default:
  52                 rs->sr_err = LDAP_OTHER;
  53                 rs->sr_text = "internal error";
  54                 goto return_results;
  55         }
  56
  57         if ( e == NULL ) {
  58                 if ( matched != NULL ) {
  59                         rs->sr_matched = ch_strdup( matched->e_dn );
  60                         rs->sr_ref = is_entry_referral( matched )
  61                                 ? get_entry_referrals( op, matched )
  62                                 : NULL;
  63                         bdb_cache_return_entry_r( bdb->bi_dbenv, &bdb->bi_cache, matched, &lock );
  64                         matched = NULL;
  65
  66                 } else {
  67                         rs->sr_ref = referral_rewrite( default_referral,
  68                                 NULL, &op->o_req_dn, LDAP_SCOPE_DEFAULT );
  69                 }
  70
  71                 rs->sr_err = LDAP_REFERRAL;
  72                 send_ldap_result( op, rs );
  73
  74                 ber_bvarray_free( rs->sr_ref );
  75                 free( (char *)rs->sr_matched );
  76                 rs->sr_ref = NULL;
  77                 rs->sr_matched = NULL;
  78
  79                 goto done;
  80         }
  81
  82         if (!manageDSAit && is_entry_referral( e ) ) {
  83                 /* entry is a referral, don't allow add */
  84                 rs->sr_ref = get_entry_referrals( op, e );
  85
  86 #ifdef NEW_LOGGING
  87                 LDAP_LOG ( OPERATION, DETAIL1,
  88                         "bdb_compare: entry is referral\n", 0, 0, 0 );
  89 #else
  90                 Debug( LDAP_DEBUG_TRACE, "entry is referral\n", 0,
  91                         0, 0 );
  92 #endif
  93
  94                 rs->sr_err = LDAP_REFERRAL;
  95                 rs->sr_matched = e->e_name.bv_val;
  96                 send_ldap_result( op, rs );
  97
  98                 ber_bvarray_free( rs->sr_ref );
  99                 rs->sr_ref = NULL;
 100                 rs->sr_matched = NULL;
 101                 goto done;
 102         }
 103
 104         rs->sr_err = access_allowed( op, e,
 105                 op->oq_compare.rs_ava->aa_desc, &op->oq_compare.rs_ava->aa_value, ACL_COMPARE, NULL );
 106         if ( ! rs->sr_err ) {
 107                 rs->sr_err = LDAP_INSUFFICIENT_ACCESS;
 108                 goto return_results;
 109         }
 110
 111         rs->sr_err = LDAP_NO_SUCH_ATTRIBUTE;
 112
 113         for(a = attrs_find( e->e_attrs, op->oq_compare.rs_ava->aa_desc );
 114                 a != NULL;
 115                 a = attrs_find( a->a_next, op->oq_compare.rs_ava->aa_desc ))
 116         {
 117                 rs->sr_err = LDAP_COMPARE_FALSE;
 118
 119                 if ( value_find_ex( op->oq_compare.rs_ava->aa_desc,
 120                         SLAP_MR_ATTRIBUTE_VALUE_NORMALIZED_MATCH |
 121                                 SLAP_MR_ASSERTED_VALUE_NORMALIZED_MATCH,
 122                         a->a_nvals, &op->oq_compare.rs_ava->aa_value, op->o_tmpmemctx ) == 0 )
 123                 {
 124                         rs->sr_err = LDAP_COMPARE_TRUE;
 125                         break;
 126                 }
 127         }
 128
 129 return_results:
 130         send_ldap_result( op, rs );
 131
 132         if( rs->sr_err == LDAP_COMPARE_FALSE || rs->sr_err == LDAP_COMPARE_TRUE ) {
 133                 rs->sr_err = LDAP_SUCCESS;
 134         }
 135
 136 done:
 137         /* free entry */
 138         if( e != NULL ) {
 139                 bdb_cache_return_entry_r( bdb->bi_dbenv, &bdb->bi_cache, e, &lock );
 140         }
 141
 142         LOCK_ID_FREE ( bdb->bi_dbenv, locker );
 143
 144         return rs->sr_err;
 145 }