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 2000-2004 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 #include "external.h"
  23
  24 int
  25 bdb_referrals( Operation *op, SlapReply *rs )
  26 {
  27         struct bdb_info *bdb = (struct bdb_info *) op->o_bd->be_private;
  28         Entry *e = NULL;
  29         EntryInfo *ei;
  30         int rc = LDAP_SUCCESS;
  31
  32         u_int32_t       locker;
  33         DB_LOCK         lock;
  34
  35         if( op->o_tag == LDAP_REQ_SEARCH ) {
  36                 /* let search take care of itself */
  37                 return rc;
  38         }
  39
  40         if( get_manageDSAit( op ) ) {
  41                 /* let op take care of DSA management */
  42                 return rc;
  43         }
  44
  45         rc = LOCK_ID(bdb->bi_dbenv, &locker);
  46         switch(rc) {
  47         case 0:
  48                 break;
  49         default:
  50                 return LDAP_OTHER;
  51         }
  52
  53 dn2entry_retry:
  54         /* get entry */
  55         rc = bdb_dn2entry( op, NULL, &op->o_req_ndn, &ei, 1, locker, &lock );
  56
  57         e = ei->bei_e;
  58         switch(rc) {
  59         case DB_NOTFOUND:
  60         case 0:
  61                 break;
  62         case LDAP_BUSY:
  63                 send_ldap_error( op, rs, LDAP_BUSY, "ldap server busy" );
  64                 LOCK_ID_FREE ( bdb->bi_dbenv, locker );
  65                 return LDAP_BUSY;
  66         case DB_LOCK_DEADLOCK:
  67         case DB_LOCK_NOTGRANTED:
  68                 goto dn2entry_retry;
  69         default:
  70                 Debug( LDAP_DEBUG_TRACE,
  71                         "bdb_referrals: dn2entry failed: %s (%d)\n",
  72                         db_strerror(rc), rc, 0 );
  73                 send_ldap_error( op, rs, LDAP_OTHER, "internal error" );
  74                 LOCK_ID_FREE ( bdb->bi_dbenv, locker );
  75                 return rs->sr_err;
  76         }
  77
  78         if ( rc == DB_NOTFOUND ) {
  79                 rc = 0;
  80                 rs->sr_matched = NULL;
  81                 if ( e != NULL ) {
  82                         Debug( LDAP_DEBUG_TRACE,
  83                                 "bdb_referrals: op=%ld target=\"%s\" matched=\"%s\"\n",
  84                                 (long) op->o_tag, op->o_req_dn.bv_val, e->e_name.bv_val );
  85
  86                         if( is_entry_referral( e ) ) {
  87                                 rc = LDAP_OTHER;
  88                                 rs->sr_ref = get_entry_referrals( op, e );
  89                                 if ( rs->sr_ref ) {
  90                                         rs->sr_matched = ber_strdup_x(
  91                                         e->e_name.bv_val, op->o_tmpmemctx );
  92                                 }
  93                         }
  94
  95                         bdb_cache_return_entry_r (bdb->bi_dbenv, &bdb->bi_cache, e, &lock);
  96                         e = NULL;
  97                 } else if ( SLAPD_GLOBAL(default_referral) != NULL ) {
  98                         rc = LDAP_OTHER;
  99                         rs->sr_ref = referral_rewrite( SLAPD_GLOBAL(default_referral),
 100                                 NULL, &op->o_req_dn, LDAP_SCOPE_DEFAULT );
 101                 }
 102
 103                 if( rs->sr_ref != NULL ) {
 104                         /* send referrals */
 105                         rs->sr_err = LDAP_REFERRAL;
 106                         send_ldap_result( op, rs );
 107                         ber_bvarray_free( rs->sr_ref );
 108                         rs->sr_ref = NULL;
 109                 } else if ( rc != LDAP_SUCCESS ) {
 110                         rs->sr_err = rc;
 111                         rs->sr_text = rs->sr_matched ? "bad referral object" : NULL;
 112                         send_ldap_result( op, rs );
 113                 }
 114
 115                 LOCK_ID_FREE ( bdb->bi_dbenv, locker );
 116                 if (rs->sr_matched) {
 117                         op->o_tmpfree( (char *)rs->sr_matched, op->o_tmpmemctx );
 118                         rs->sr_matched = NULL;
 119                 }
 120                 return rc;
 121         }
 122
 123         if ( is_entry_referral( e ) ) {
 124                 /* entry is a referral */
 125                 BerVarray refs = get_entry_referrals( op, e );
 126                 rs->sr_ref = referral_rewrite(
 127                         refs, &e->e_name, &op->o_req_dn, LDAP_SCOPE_DEFAULT );
 128
 129                 Debug( LDAP_DEBUG_TRACE,
 130                         "bdb_referrals: op=%ld target=\"%s\" matched=\"%s\"\n",
 131                         (long) op->o_tag, op->o_req_dn.bv_val, e->e_name.bv_val );
 132
 133                 rs->sr_matched = e->e_name.bv_val;
 134                 if( rs->sr_ref != NULL ) {
 135                         rc = rs->sr_err = LDAP_REFERRAL;
 136                         send_ldap_result( op, rs );
 137                         ber_bvarray_free( rs->sr_ref );
 138                         rs->sr_ref = NULL;
 139                 } else {
 140                         send_ldap_error( op, rs, LDAP_OTHER, "bad referral object" );
 141                         rc = rs->sr_err;
 142                 }
 143
 144                 rs->sr_matched = NULL;
 145                 ber_bvarray_free( refs );
 146         }
 147
 148         bdb_cache_return_entry_r(bdb->bi_dbenv, &bdb->bi_cache, e, &lock);
 149         LOCK_ID_FREE ( bdb->bi_dbenv, locker );
 150         return rc;
 151 }