external/bsd/openldap/dist/servers/slapd/back-bdb/referral.c

   1 /* referral.c - BDB backend referral handler */
   2 /* $OpenLDAP: pkg/ldap/servers/slapd/back-bdb/referral.c,v 1.42.2.6 2008/04/16 16:41:17 quanah Exp $ */
   3 /* This work is part of OpenLDAP Software <http://www.openldap.org/>.
   4  *
   5  * Copyright 2000-2008 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         BDB_LOCKER      locker;
  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 = LOCK_ID(bdb->bi_dbenv, &locker);
  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, NULL, &op->o_req_ndn, &ei, 1, locker, &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                 LOCK_ID_FREE ( bdb->bi_dbenv, locker );
  69                 rs->sr_text = "ldap server busy";
  70                 return LDAP_BUSY;
  71         case DB_LOCK_DEADLOCK:
  72         case DB_LOCK_NOTGRANTED:
  73                 goto dn2entry_retry;
  74         default:
  75                 Debug( LDAP_DEBUG_TRACE,
  76                         LDAP_XSTRING(bdb_referrals)
  77                         ": dn2entry failed: %s (%d)\n",
  78                         db_strerror(rc), rc, 0 );
  79                 LOCK_ID_FREE ( bdb->bi_dbenv, locker );
  80                 rs->sr_text = "internal error";
  81                 return LDAP_OTHER;
  82         }
  83
  84         if ( rc == DB_NOTFOUND ) {
  85                 rc = LDAP_SUCCESS;
  86                 rs->sr_matched = NULL;
  87                 if ( e != NULL ) {
  88                         Debug( LDAP_DEBUG_TRACE,
  89                                 LDAP_XSTRING(bdb_referrals)
  90                                 ": tag=%lu target=\"%s\" matched=\"%s\"\n",
  91                                 (unsigned long)op->o_tag, op->o_req_dn.bv_val, e->e_name.bv_val );
  92
  93                         if( is_entry_referral( e ) ) {
  94                                 BerVarray ref = get_entry_referrals( op, e );
  95                                 rc = LDAP_OTHER;
  96                                 rs->sr_ref = referral_rewrite( ref, &e->e_name,
  97                                         &op->o_req_dn, LDAP_SCOPE_DEFAULT );
  98                                 ber_bvarray_free( ref );
  99                                 if ( rs->sr_ref ) {
 100                                         rs->sr_matched = ber_strdup_x(
 101                                         e->e_name.bv_val, op->o_tmpmemctx );
 102                                 }
 103                         }
 104
 105                         bdb_cache_return_entry_r (bdb, e, &lock);
 106                         e = NULL;
 107                 }
 108
 109                 if( rs->sr_ref != NULL ) {
 110                         /* send referrals */
 111                         rc = rs->sr_err = LDAP_REFERRAL;
 112                         send_ldap_result( op, rs );
 113                         ber_bvarray_free( rs->sr_ref );
 114                         rs->sr_ref = NULL;
 115                 } else if ( rc != LDAP_SUCCESS ) {
 116                         rs->sr_text = rs->sr_matched ? "bad referral object" : NULL;
 117                 }
 118
 119                 LOCK_ID_FREE ( bdb->bi_dbenv, locker );
 120                 if (rs->sr_matched) {
 121                         op->o_tmpfree( (char *)rs->sr_matched, op->o_tmpmemctx );
 122                         rs->sr_matched = NULL;
 123                 }
 124                 return rc;
 125         }
 126
 127         if ( is_entry_referral( e ) ) {
 128                 /* entry is a referral */
 129                 BerVarray refs = get_entry_referrals( op, e );
 130                 rs->sr_ref = referral_rewrite(
 131                         refs, &e->e_name, &op->o_req_dn, LDAP_SCOPE_DEFAULT );
 132
 133                 Debug( LDAP_DEBUG_TRACE,
 134                         LDAP_XSTRING(bdb_referrals)
 135                         ": tag=%lu target=\"%s\" matched=\"%s\"\n",
 136                         (unsigned long)op->o_tag, op->o_req_dn.bv_val, e->e_name.bv_val );
 137
 138                 rs->sr_matched = e->e_name.bv_val;
 139                 if( rs->sr_ref != NULL ) {
 140                         rc = rs->sr_err = LDAP_REFERRAL;
 141                         send_ldap_result( op, rs );
 142                         ber_bvarray_free( rs->sr_ref );
 143                         rs->sr_ref = NULL;
 144                 } else {
 145                         rc = LDAP_OTHER;
 146                         rs->sr_text = "bad referral object";
 147                 }
 148
 149                 rs->sr_matched = NULL;
 150                 ber_bvarray_free( refs );
 151         }
 152
 153         bdb_cache_return_entry_r(bdb, e, &lock);
 154         LOCK_ID_FREE ( bdb->bi_dbenv, locker );
 155         return rc;
 156 }