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 #ifdef NEW_LOGGING
  71                 LDAP_LOG ( OPERATION, ERR,
  72                         "bdb_referrals: dn2entry failed: %s (%d)\n",
  73                         db_strerror(rc), rc, 0 );
  74 #else
  75                 Debug( LDAP_DEBUG_TRACE,
  76                         LDAP_XSTRING(bdb_referrals)
  77                         ": dn2entry failed: %s (%d)\n",
  78                         db_strerror(rc), rc, 0 );
  79 #endif
  80                 send_ldap_error( op, rs, LDAP_OTHER, "internal error" );
  81                 LOCK_ID_FREE ( bdb->bi_dbenv, locker );
  82                 return rs->sr_err;
  83         }
  84
  85         if ( rc == DB_NOTFOUND ) {
  86                 rc = 0;
  87                 rs->sr_matched = NULL;
  88                 if ( e != NULL ) {
  89 #ifdef NEW_LOGGING
  90                         LDAP_LOG ( OPERATION, DETAIL1,
  91                         "bdb_referrals: op=%ld target=\"%s\" matched=\"%s\"\n",
  92                         (long) op->o_tag, op->o_req_dn.bv_val, e->e_name.bv_val );
  93 #else
  94                         Debug( LDAP_DEBUG_TRACE,
  95                                 LDAP_XSTRING(bdb_referrals)
  96                                 ": op=%ld target=\"%s\" matched=\"%s\"\n",
  97                                 (long) op->o_tag, op->o_req_dn.bv_val, e->e_name.bv_val );
  98 #endif
  99
 100                         if( is_entry_referral( e ) ) {
 101                                 rc = LDAP_OTHER;
 102                                 rs->sr_ref = get_entry_referrals( op, e );
 103                                 if ( rs->sr_ref ) {
 104                                         rs->sr_matched = ber_strdup_x(
 105                                         e->e_name.bv_val, op->o_tmpmemctx );
 106                                 }
 107                         }
 108
 109                         bdb_cache_return_entry_r (bdb->bi_dbenv, &bdb->bi_cache, e, &lock);
 110                         e = NULL;
 111                 } else if ( default_referral != NULL ) {
 112                         rc = LDAP_OTHER;
 113                         rs->sr_ref = referral_rewrite( default_referral,
 114                                 NULL, &op->o_req_dn, LDAP_SCOPE_DEFAULT );
 115                 }
 116
 117                 if( rs->sr_ref != NULL ) {
 118                         /* send referrals */
 119                         rc = rs->sr_err = LDAP_REFERRAL;
 120                         send_ldap_result( op, rs );
 121                         ber_bvarray_free( rs->sr_ref );
 122                         rs->sr_ref = NULL;
 123                 } else if ( rc != LDAP_SUCCESS ) {
 124                         rs->sr_err = rc;
 125                         rs->sr_text = rs->sr_matched ? "bad referral object" : NULL;
 126                         send_ldap_result( op, rs );
 127                 }
 128
 129                 LOCK_ID_FREE ( bdb->bi_dbenv, locker );
 130                 if (rs->sr_matched) {
 131                         op->o_tmpfree( (char *)rs->sr_matched, op->o_tmpmemctx );
 132                         rs->sr_matched = NULL;
 133                 }
 134                 return rc;
 135         }
 136
 137         if ( is_entry_referral( e ) ) {
 138                 /* entry is a referral */
 139                 BerVarray refs = get_entry_referrals( op, e );
 140                 rs->sr_ref = referral_rewrite(
 141                         refs, &e->e_name, &op->o_req_dn, LDAP_SCOPE_DEFAULT );
 142
 143 #ifdef NEW_LOGGING
 144                 LDAP_LOG ( OPERATION, DETAIL1,
 145                         "bdb_referrals: op=%ld target=\"%s\" matched=\"%s\"\n",
 146                         (long) op->o_tag, op->o_req_dn.bv_val, e->e_name.bv_val );
 147 #else
 148                 Debug( LDAP_DEBUG_TRACE,
 149                         LDAP_XSTRING(bdb_referrals)
 150                         ": op=%ld target=\"%s\" matched=\"%s\"\n",
 151                         (long) op->o_tag, op->o_req_dn.bv_val, e->e_name.bv_val );
 152 #endif
 153
 154                 rs->sr_matched = e->e_name.bv_val;
 155                 if( rs->sr_ref != NULL ) {
 156                         rc = rs->sr_err = LDAP_REFERRAL;
 157                         send_ldap_result( op, rs );
 158                         ber_bvarray_free( rs->sr_ref );
 159                         rs->sr_ref = NULL;
 160                 } else {
 161                         send_ldap_error( op, rs, LDAP_OTHER, "bad referral object" );
 162                         rc = rs->sr_err;
 163                 }
 164
 165                 rs->sr_matched = NULL;
 166                 ber_bvarray_free( refs );
 167         }
 168
 169         bdb_cache_return_entry_r(bdb->bi_dbenv, &bdb->bi_cache, e, &lock);
 170         LOCK_ID_FREE ( bdb->bi_dbenv, locker );
 171         return rc;
 172 }