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

   1 /* referral.c - BDB backend referral handler */
   2 /* $OpenLDAP$ */
   3 /* This work is part of OpenLDAP Software <http://www.openldap.org/>.
   4  *
   5  * Copyright 2000-2014 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 #include <stdio.h>
  19 #include <ac/string.h>
  20
  21 #include "back-bdb.h"
  22
  23 int
  24 bdb_referrals( Operation *op, SlapReply *rs )
  25 {
  26         struct bdb_info *bdb = (struct bdb_info *) op->o_bd->be_private;
  27         Entry *e = NULL;
  28         EntryInfo *ei;
  29         int rc = LDAP_SUCCESS;
  30
  31         DB_TXN          *rtxn;
  32         DB_LOCK         lock;
  33
  34         if( op->o_tag == LDAP_REQ_SEARCH ) {
  35                 /* let search take care of itself */
  36                 return rc;
  37         }
  38
  39         if( get_manageDSAit( op ) ) {
  40                 /* let op take care of DSA management */
  41                 return rc;
  42         }
  43
  44         rc = bdb_reader_get(op, bdb->bi_dbenv, &rtxn);
  45         switch(rc) {
  46         case 0:
  47                 break;
  48         default:
  49                 return LDAP_OTHER;
  50         }
  51
  52 dn2entry_retry:
  53         /* get entry */
  54         rc = bdb_dn2entry( op, rtxn, &op->o_req_ndn, &ei, 1, &lock );
  55
  56         /* bdb_dn2entry() may legally leave ei == NULL
  57          * if rc != 0 and rc != DB_NOTFOUND
  58          */
  59         if ( ei ) {
  60                 e = ei->bei_e;
  61         }
  62
  63         switch(rc) {
  64         case DB_NOTFOUND:
  65         case 0:
  66                 break;
  67         case LDAP_BUSY:
  68                 rs->sr_text = "ldap server busy";
  69                 return LDAP_BUSY;
  70         case DB_LOCK_DEADLOCK:
  71         case DB_LOCK_NOTGRANTED:
  72                 goto dn2entry_retry;
  73         default:
  74                 Debug( LDAP_DEBUG_TRACE,
  75                         LDAP_XSTRING(bdb_referrals)
  76                         ": dn2entry failed: %s (%d)\n",
  77                         db_strerror(rc), rc, 0 );
  78                 rs->sr_text = "internal error";
  79                 return LDAP_OTHER;
  80         }
  81
  82         if ( rc == DB_NOTFOUND ) {
  83                 rc = LDAP_SUCCESS;
  84                 rs->sr_matched = NULL;
  85                 if ( e != NULL ) {
  86                         Debug( LDAP_DEBUG_TRACE,
  87                                 LDAP_XSTRING(bdb_referrals)
  88                                 ": tag=%lu target=\"%s\" matched=\"%s\"\n",
  89                                 (unsigned long)op->o_tag, op->o_req_dn.bv_val, e->e_name.bv_val );
  90
  91                         if( is_entry_referral( e ) ) {
  92                                 BerVarray ref = get_entry_referrals( op, e );
  93                                 rc = LDAP_OTHER;
  94                                 rs->sr_ref = referral_rewrite( ref, &e->e_name,
  95                                         &op->o_req_dn, LDAP_SCOPE_DEFAULT );
  96                                 ber_bvarray_free( ref );
  97                                 if ( rs->sr_ref ) {
  98                                         rs->sr_matched = ber_strdup_x(
  99                                         e->e_name.bv_val, op->o_tmpmemctx );
 100                                 }
 101                         }
 102
 103                         bdb_cache_return_entry_r (bdb, e, &lock);
 104                         e = NULL;
 105                 }
 106
 107                 if( rs->sr_ref != NULL ) {
 108                         /* send referrals */
 109                         rc = rs->sr_err = LDAP_REFERRAL;
 110                         send_ldap_result( op, rs );
 111                         ber_bvarray_free( rs->sr_ref );
 112                         rs->sr_ref = NULL;
 113                 } else if ( rc != LDAP_SUCCESS ) {
 114                         rs->sr_text = rs->sr_matched ? "bad referral object" : NULL;
 115                 }
 116
 117                 if (rs->sr_matched) {
 118                         op->o_tmpfree( (char *)rs->sr_matched, op->o_tmpmemctx );
 119                         rs->sr_matched = NULL;
 120                 }
 121                 return rc;
 122         }
 123
 124         if ( is_entry_referral( e ) ) {
 125                 /* entry is a referral */
 126                 BerVarray refs = get_entry_referrals( op, e );
 127                 rs->sr_ref = referral_rewrite(
 128                         refs, &e->e_name, &op->o_req_dn, LDAP_SCOPE_DEFAULT );
 129
 130                 Debug( LDAP_DEBUG_TRACE,
 131                         LDAP_XSTRING(bdb_referrals)
 132                         ": tag=%lu target=\"%s\" matched=\"%s\"\n",
 133                         (unsigned long)op->o_tag, op->o_req_dn.bv_val, e->e_name.bv_val );
 134
 135                 rs->sr_matched = e->e_name.bv_val;
 136                 if( rs->sr_ref != NULL ) {
 137                         rc = rs->sr_err = LDAP_REFERRAL;
 138                         send_ldap_result( op, rs );
 139                         ber_bvarray_free( rs->sr_ref );
 140                         rs->sr_ref = NULL;
 141                 } else {
 142                         rc = LDAP_OTHER;
 143                         rs->sr_text = "bad referral object";
 144                 }
 145
 146                 rs->sr_matched = NULL;
 147                 ber_bvarray_free( refs );
 148         }
 149
 150         bdb_cache_return_entry_r(bdb, e, &lock);
 151         return rc;
 152 }