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

   1 /* referral.c - MDB backend referral handler */
   2 /* $OpenLDAP$ */
   3 /* This work is part of OpenLDAP Software <http://www.openldap.org/>.
   4  *
   5  * Copyright 2000-2018 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-mdb.h"
  22
  23 int
  24 mdb_referrals( Operation *op, SlapReply *rs )
  25 {
  26         struct mdb_info *mdb = (struct mdb_info *) op->o_bd->be_private;
  27         Entry *e = NULL;
  28         int rc = LDAP_SUCCESS;
  29
  30         MDB_txn         *rtxn;
  31         mdb_op_info     opinfo = {0}, *moi = &opinfo;
  32
  33         if( op->o_tag == LDAP_REQ_SEARCH ) {
  34                 /* let search take care of itself */
  35                 return rc;
  36         }
  37
  38         if( get_manageDSAit( op ) ) {
  39                 /* let op take care of DSA management */
  40                 return rc;
  41         }
  42
  43         rc = mdb_opinfo_get(op, mdb, 1, &moi);
  44         switch(rc) {
  45         case 0:
  46                 break;
  47         default:
  48                 return LDAP_OTHER;
  49         }
  50
  51         rtxn = moi->moi_txn;
  52
  53         /* get entry */
  54         rc = mdb_dn2entry( op, rtxn, &op->o_req_ndn, &e, 1 );
  55
  56         switch(rc) {
  57         case MDB_NOTFOUND:
  58         case 0:
  59                 break;
  60         case LDAP_BUSY:
  61                 rs->sr_text = "ldap server busy";
  62                 goto done;
  63         default:
  64                 Debug( LDAP_DEBUG_TRACE,
  65                         LDAP_XSTRING(mdb_referrals)
  66                         ": dn2entry failed: %s (%d)\n",
  67                         mdb_strerror(rc), rc, 0 );
  68                 rs->sr_text = "internal error";
  69                 rc = LDAP_OTHER;
  70                 goto done;
  71         }
  72
  73         if ( rc == MDB_NOTFOUND ) {
  74                 rc = LDAP_SUCCESS;
  75                 rs->sr_matched = NULL;
  76                 if ( e != NULL ) {
  77                         Debug( LDAP_DEBUG_TRACE,
  78                                 LDAP_XSTRING(mdb_referrals)
  79                                 ": tag=%lu target=\"%s\" matched=\"%s\"\n",
  80                                 (unsigned long)op->o_tag, op->o_req_dn.bv_val, e->e_name.bv_val );
  81
  82                         if( is_entry_referral( e ) ) {
  83                                 BerVarray ref = get_entry_referrals( op, e );
  84                                 rc = LDAP_OTHER;
  85                                 rs->sr_ref = referral_rewrite( ref, &e->e_name,
  86                                         &op->o_req_dn, LDAP_SCOPE_DEFAULT );
  87                                 ber_bvarray_free( ref );
  88                                 if ( rs->sr_ref ) {
  89                                         rs->sr_matched = ber_strdup_x(
  90                                         e->e_name.bv_val, op->o_tmpmemctx );
  91                                 }
  92                         }
  93
  94                         mdb_entry_return( op, e );
  95                         e = NULL;
  96                 }
  97
  98                 if( rs->sr_ref != NULL ) {
  99                         /* send referrals */
 100                         rc = rs->sr_err = LDAP_REFERRAL;
 101                         send_ldap_result( op, rs );
 102                         ber_bvarray_free( rs->sr_ref );
 103                         rs->sr_ref = NULL;
 104                 } else if ( rc != LDAP_SUCCESS ) {
 105                         rs->sr_text = rs->sr_matched ? "bad referral object" : NULL;
 106                 }
 107
 108                 if (rs->sr_matched) {
 109                         op->o_tmpfree( (char *)rs->sr_matched, op->o_tmpmemctx );
 110                         rs->sr_matched = NULL;
 111                 }
 112                 goto done;
 113         }
 114
 115         if ( is_entry_referral( e ) ) {
 116                 /* entry is a referral */
 117                 BerVarray refs = get_entry_referrals( op, e );
 118                 rs->sr_ref = referral_rewrite(
 119                         refs, &e->e_name, &op->o_req_dn, LDAP_SCOPE_DEFAULT );
 120
 121                 Debug( LDAP_DEBUG_TRACE,
 122                         LDAP_XSTRING(mdb_referrals)
 123                         ": tag=%lu target=\"%s\" matched=\"%s\"\n",
 124                         (unsigned long)op->o_tag, op->o_req_dn.bv_val, e->e_name.bv_val );
 125
 126                 rs->sr_matched = e->e_name.bv_val;
 127                 if( rs->sr_ref != NULL ) {
 128                         rc = rs->sr_err = LDAP_REFERRAL;
 129                         send_ldap_result( op, rs );
 130                         ber_bvarray_free( rs->sr_ref );
 131                         rs->sr_ref = NULL;
 132                 } else {
 133                         rc = LDAP_OTHER;
 134                         rs->sr_text = "bad referral object";
 135                 }
 136
 137                 rs->sr_matched = NULL;
 138                 ber_bvarray_free( refs );
 139         }
 140
 141 done:
 142         if ( moi == &opinfo ) {
 143                 mdb_txn_reset( moi->moi_txn );
 144                 LDAP_SLIST_REMOVE( &op->o_extra, &moi->moi_oe, OpExtra, oe_next );
 145         } else {
 146                 moi->moi_ref--;
 147         }
 148         if ( e )
 149                 mdb_entry_return( op, e );
 150         return rc;
 151 }