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

   1 /* referral.c - BDB backend referral handler */
   2 /* $OpenLDAP$ */
   3 /*
   4  * Copyright 2000-2002 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(
  17         BackendDB       *be,
  18         Connection      *conn,
  19         Operation       *op,
  20         struct berval *dn,
  21         struct berval *ndn,
  22         const char **text )
  23 {
  24         struct bdb_info *bdb = (struct bdb_info *) be->be_private;
  25         int rc = LDAP_SUCCESS;
  26         Entry *e = NULL;
  27         Entry *matched = NULL;
  28
  29         u_int32_t       locker;
  30         DB_LOCK         lock;
  31
  32         if( op->o_tag == LDAP_REQ_SEARCH ) {
  33                 /* let search take care of itself */
  34                 return rc;
  35         }
  36
  37         if( get_manageDSAit( op ) ) {
  38                 /* let op take care of DSA management */
  39                 return rc;
  40         }
  41
  42         rc = LOCK_ID(bdb->bi_dbenv, &locker);
  43         switch(rc) {
  44         case 0:
  45                 break;
  46         default:
  47                 return LDAP_OTHER;
  48         }
  49
  50 dn2entry_retry:
  51         /* get entry */
  52         rc = bdb_dn2entry_r( be, NULL, ndn, &e, &matched, 0, locker, &lock );
  53
  54         switch(rc) {
  55         case DB_NOTFOUND:
  56                 rc = 0;
  57         case 0:
  58                 break;
  59         case LDAP_BUSY:
  60                 if (e != NULL) {
  61                         bdb_cache_return_entry_r(bdb->bi_dbenv, &bdb->bi_cache, e, &lock);
  62                 }
  63                 if (matched != NULL) {
  64                         bdb_cache_return_entry_r(bdb->bi_dbenv, &bdb->bi_cache, matched, &lock);
  65                 }
  66                 send_ldap_result( conn, op, LDAP_BUSY,
  67                         NULL, "ldap server busy", NULL, NULL );
  68                 LOCK_ID_FREE ( bdb->bi_dbenv, locker );
  69                 return LDAP_BUSY;
  70         case DB_LOCK_DEADLOCK:
  71         case DB_LOCK_NOTGRANTED:
  72                 goto dn2entry_retry;
  73         default:
  74 #ifdef NEW_LOGGING
  75                 LDAP_LOG ( OPERATION, ERR,
  76                         "bdb_referrals: dn2entry failed: %s (%d)\n",
  77                         db_strerror(rc), rc, 0 );
  78 #else
  79                 Debug( LDAP_DEBUG_TRACE,
  80                         "bdb_referrals: dn2entry failed: %s (%d)\n",
  81                         db_strerror(rc), rc, 0 );
  82 #endif
  83                 if (e != NULL) {
  84                         bdb_cache_return_entry_r(bdb->bi_dbenv, &bdb->bi_cache, e, &lock);
  85                 }
  86                 if (matched != NULL) {
  87                         bdb_cache_return_entry_r(bdb->bi_dbenv, &bdb->bi_cache, matched, &lock);
  88                 }
  89                 send_ldap_result( conn, op, rc=LDAP_OTHER,
  90                         NULL, "internal error", NULL, NULL );
  91                 LOCK_ID_FREE ( bdb->bi_dbenv, locker );
  92                 return rc;
  93         }
  94
  95         if ( e == NULL ) {
  96                 char *matched_dn = NULL;
  97                 BerVarray refs = NULL;
  98
  99                 if ( matched != NULL ) {
 100                         matched_dn = ch_strdup( matched->e_dn );
 101
 102 #ifdef NEW_LOGGING
 103                 LDAP_LOG ( OPERATION, DETAIL1,
 104                         "bdb_referrals: op=%ld target=\"%s\" matched=\"%s\"\n",
 105                         (long) op->o_tag, dn->bv_val, matched_dn );
 106 #else
 107                         Debug( LDAP_DEBUG_TRACE,
 108                                 "bdb_referrals: op=%ld target=\"%s\" matched=\"%s\"\n",
 109                                 (long) op->o_tag, dn->bv_val, matched_dn );
 110 #endif
 111
 112                         if( is_entry_referral( matched ) ) {
 113                                 rc = LDAP_OTHER;
 114                                 refs = get_entry_referrals( be, conn, op, matched );
 115                         }
 116
 117                         bdb_cache_return_entry_r (bdb->bi_dbenv, &bdb->bi_cache, matched, &lock);
 118                         matched = NULL;
 119                 } else if ( default_referral != NULL ) {
 120                         rc = LDAP_OTHER;
 121                         refs = referral_rewrite( default_referral,
 122                                 NULL, dn, LDAP_SCOPE_DEFAULT );
 123                 }
 124
 125                 if( refs != NULL ) {
 126                         /* send referrals */
 127                         send_ldap_result( conn, op, rc = LDAP_REFERRAL,
 128                                 matched_dn, NULL, refs, NULL );
 129                         ber_bvarray_free( refs );
 130                 } else if ( rc != LDAP_SUCCESS ) {
 131                         send_ldap_result( conn, op, rc, matched_dn,
 132                                 matched_dn ? "bad referral object" : NULL,
 133                                 NULL, NULL );
 134                 }
 135
 136                 LOCK_ID_FREE ( bdb->bi_dbenv, locker );
 137                 free( matched_dn );
 138                 return rc;
 139         }
 140
 141         if ( is_entry_referral( e ) ) {
 142                 /* entry is a referral */
 143                 BerVarray refs = get_entry_referrals( be, conn, op, e );
 144                 BerVarray rrefs = referral_rewrite(
 145                         refs, &e->e_name, dn, LDAP_SCOPE_DEFAULT );
 146
 147 #ifdef NEW_LOGGING
 148                 LDAP_LOG ( OPERATION, DETAIL1,
 149                         "bdb_referrals: op=%ld target=\"%s\" matched=\"%s\"\n",
 150                         (long) op->o_tag, dn->bv_val, e->e_dn );
 151 #else
 152                 Debug( LDAP_DEBUG_TRACE,
 153                         "bdb_referrals: op=%ld target=\"%s\" matched=\"%s\"\n",
 154                         (long) op->o_tag, dn->bv_val, e->e_dn );
 155 #endif
 156
 157                 if( rrefs != NULL ) {
 158                         send_ldap_result( conn, op, rc = LDAP_REFERRAL,
 159                                 e->e_dn, NULL, rrefs, NULL );
 160                         ber_bvarray_free( rrefs );
 161                 } else {
 162                         send_ldap_result( conn, op, rc = LDAP_OTHER, e->e_dn,
 163                                 "bad referral object", NULL, NULL );
 164                 }
 165
 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 }