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

   1 /* referral.c - BDB backend referral handler */
   2 /* $OpenLDAP$ */
   3 /*
   4  * Copyright 2000-2003 The OpenLDAP Foundation, All Rights Reserved.
   5  * COPYING RESTRICTIONS APPLY, see COPYRIGHT file
   6  */
   7
   8 #include "portable.h"
   9 #include <stdio.h>
  10 #include <ac/string.h>
  11
  12 #include "back-bdb.h"
  13 #include "external.h"
  14
  15 int
  16 bdb_referrals( Operation *op, SlapReply *rs )
  17 {
  18         struct bdb_info *bdb = (struct bdb_info *) op->o_bd->be_private;
  19         Entry *e = NULL;
  20         Entry *matched = NULL;
  21         int rc = LDAP_SUCCESS;
  22
  23         u_int32_t       locker;
  24         DB_LOCK         lock;
  25
  26         if( op->o_tag == LDAP_REQ_SEARCH ) {
  27                 /* let search take care of itself */
  28                 return rc;
  29         }
  30
  31         if( get_manageDSAit( op ) ) {
  32                 /* let op take care of DSA management */
  33                 return rc;
  34         }
  35
  36         rc = LOCK_ID(bdb->bi_dbenv, &locker);
  37         switch(rc) {
  38         case 0:
  39                 break;
  40         default:
  41                 return LDAP_OTHER;
  42         }
  43
  44 dn2entry_retry:
  45         /* get entry */
  46         rc = bdb_dn2entry_r( op->o_bd, NULL, &op->o_req_ndn, &e, &matched, 0, locker, &lock );
  47
  48         switch(rc) {
  49         case DB_NOTFOUND:
  50                 rc = 0;
  51         case 0:
  52                 break;
  53         case LDAP_BUSY:
  54                 if (e != NULL) {
  55                         bdb_cache_return_entry_r(bdb->bi_dbenv, &bdb->bi_cache, e, &lock);
  56                 }
  57                 if (matched != NULL) {
  58                         bdb_cache_return_entry_r(bdb->bi_dbenv, &bdb->bi_cache, matched, &lock);
  59                 }
  60                 send_ldap_error( op, rs, LDAP_BUSY, "ldap server busy" );
  61                 LOCK_ID_FREE ( bdb->bi_dbenv, locker );
  62                 return LDAP_BUSY;
  63         case DB_LOCK_DEADLOCK:
  64         case DB_LOCK_NOTGRANTED:
  65                 goto dn2entry_retry;
  66         default:
  67 #ifdef NEW_LOGGING
  68                 LDAP_LOG ( OPERATION, ERR,
  69                         "bdb_referrals: dn2entry failed: %s (%d)\n",
  70                         db_strerror(rc), rc, 0 );
  71 #else
  72                 Debug( LDAP_DEBUG_TRACE,
  73                         "bdb_referrals: dn2entry failed: %s (%d)\n",
  74                         db_strerror(rc), rc, 0 );
  75 #endif
  76                 if (e != NULL) {
  77                         bdb_cache_return_entry_r(bdb->bi_dbenv, &bdb->bi_cache, e, &lock);
  78                 }
  79                 if (matched != NULL) {
  80                         bdb_cache_return_entry_r(bdb->bi_dbenv, &bdb->bi_cache, matched, &lock);
  81                 }
  82                 send_ldap_error( op, rs, LDAP_OTHER, "internal error" );
  83                 LOCK_ID_FREE ( bdb->bi_dbenv, locker );
  84                 return rs->sr_err;
  85         }
  86
  87         if ( e == NULL ) {
  88                 if ( matched != NULL ) {
  89                         rs->sr_matched = ch_strdup( matched->e_name.bv_val );
  90
  91 #ifdef NEW_LOGGING
  92                 LDAP_LOG ( OPERATION, DETAIL1,
  93                         "bdb_referrals: op=%ld target=\"%s\" matched=\"%s\"\n",
  94                         (long) op->o_tag, op->o_req_dn.bv_val, rs->sr_matched );
  95 #else
  96                         Debug( LDAP_DEBUG_TRACE,
  97                                 "bdb_referrals: op=%ld target=\"%s\" matched=\"%s\"\n",
  98                                 (long) op->o_tag, op->o_req_dn.bv_val, rs->sr_matched );
  99 #endif
 100
 101                         if( is_entry_referral( matched ) ) {
 102                                 rc = LDAP_OTHER;
 103                                 rs->sr_ref = get_entry_referrals( op, matched );
 104                         }
 105
 106                         bdb_cache_return_entry_r (bdb->bi_dbenv, &bdb->bi_cache, matched, &lock);
 107                         matched = NULL;
 108                 } else if ( default_referral != NULL ) {
 109                         rc = LDAP_OTHER;
 110                         rs->sr_ref = referral_rewrite( default_referral,
 111                                 NULL, &op->o_req_dn, LDAP_SCOPE_DEFAULT );
 112                 }
 113
 114                 if( rs->sr_ref != NULL ) {
 115                         /* send referrals */
 116                         rs->sr_err = LDAP_REFERRAL;
 117                         send_ldap_result( op, rs );
 118                         ber_bvarray_free( rs->sr_ref );
 119                         rs->sr_ref = NULL;
 120                 } else if ( rc != LDAP_SUCCESS ) {
 121                         rs->sr_err = rc;
 122                         rs->sr_text = rs->sr_matched ? "bad referral object" : NULL;
 123                         send_ldap_result( op, rs );
 124                 }
 125
 126                 LOCK_ID_FREE ( bdb->bi_dbenv, locker );
 127                 free( (char *)rs->sr_matched );
 128                 rs->sr_matched = NULL;
 129                 return rc;
 130         }
 131
 132         if ( is_entry_referral( e ) ) {
 133                 /* entry is a referral */
 134                 BerVarray refs = get_entry_referrals( op, e );
 135                 rs->sr_ref = referral_rewrite(
 136                         refs, &e->e_name, &op->o_req_dn, LDAP_SCOPE_DEFAULT );
 137
 138 #ifdef NEW_LOGGING
 139                 LDAP_LOG ( OPERATION, DETAIL1,
 140                         "bdb_referrals: op=%ld target=\"%s\" matched=\"%s\"\n",
 141                         (long) op->o_tag, op->o_req_dn.bv_val, e->e_dn );
 142 #else
 143                 Debug( LDAP_DEBUG_TRACE,
 144                         "bdb_referrals: op=%ld target=\"%s\" matched=\"%s\"\n",
 145                         (long) op->o_tag, op->o_req_dn.bv_val, e->e_dn );
 146 #endif
 147
 148                 rs->sr_matched = e->e_name.bv_val;
 149                 if( rs->sr_ref != NULL ) {
 150                         rs->sr_err = LDAP_REFERRAL;
 151                         send_ldap_result( op, rs );
 152                         ber_bvarray_free( rs->sr_ref );
 153                         rs->sr_ref = NULL;
 154                 } else {
 155                         send_ldap_error( op, rs, LDAP_OTHER, "bad referral object" );
 156                         rc = rs->sr_err;
 157                 }
 158
 159                 rs->sr_matched = NULL;
 160                 ber_bvarray_free( refs );
 161         }
 162
 163         bdb_cache_return_entry_r(bdb->bi_dbenv, &bdb->bi_cache, e, &lock);
 164         LOCK_ID_FREE ( bdb->bi_dbenv, locker );
 165         return rc;
 166 }