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         LOCK_ID ( bdb->bi_dbenv, &locker );
  43
  44 dn2entry_retry:
  45         /* get entry */
  46         rc = bdb_dn2entry_r( be, NULL, 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_result( conn, op, LDAP_BUSY,
  61                         NULL, "ldap server busy", NULL, NULL );
  62                 LOCK_ID_FREE ( bdb->bi_dbenv, locker );
  63                 return LDAP_BUSY;
  64         case DB_LOCK_DEADLOCK:
  65         case DB_LOCK_NOTGRANTED:
  66                 goto dn2entry_retry;
  67         default:
  68 #ifdef NEW_LOGGING
  69                 LDAP_LOG (( "referral", LDAP_LEVEL_ERR,
  70                         "bdb_referrals: dn2entry failed: %s (%d)\n",
  71                         db_strerror(rc), rc ));
  72 #else
  73                 Debug( LDAP_DEBUG_TRACE,
  74                         "bdb_referrals: dn2entry failed: %s (%d)\n",
  75                         db_strerror(rc), rc, 0 );
  76 #endif
  77                 if (e != NULL) {
  78                         bdb_cache_return_entry_r(bdb->bi_dbenv, &bdb->bi_cache, e, &lock);
  79                 }
  80                 if (matched != NULL) {
  81                         bdb_cache_return_entry_r(bdb->bi_dbenv, &bdb->bi_cache, matched, &lock);
  82                 }
  83                 send_ldap_result( conn, op, rc=LDAP_OTHER,
  84                         NULL, "internal error", NULL, NULL );
  85                 LOCK_ID_FREE ( bdb->bi_dbenv, locker );
  86                 return rc;
  87         }
  88
  89         if ( e == NULL ) {
  90                 char *matched_dn = NULL;
  91                 BerVarray refs = NULL;
  92
  93                 if ( matched != NULL ) {
  94                         matched_dn = ch_strdup( matched->e_dn );
  95
  96 #ifdef NEW_LOGGING
  97                 LDAP_LOG (( "referral", LDAP_LEVEL_DETAIL1,
  98                         "bdb_referrals: op=%ld target=\"%s\" matched=\"%s\"\n",
  99                         (long) op->o_tag, dn->bv_val, matched_dn ));
 100 #else
 101                         Debug( LDAP_DEBUG_TRACE,
 102                                 "bdb_referrals: op=%ld target=\"%s\" matched=\"%s\"\n",
 103                                 (long) op->o_tag, dn->bv_val, matched_dn );
 104 #endif
 105
 106                         if( is_entry_referral( matched ) ) {
 107                                 rc = LDAP_OTHER;
 108                                 refs = get_entry_referrals( be, conn, op, matched );
 109                         }
 110
 111                         bdb_cache_return_entry_r (bdb->bi_dbenv, &bdb->bi_cache, matched, &lock);
 112                         matched = NULL;
 113                 } else if ( default_referral != NULL ) {
 114                         rc = LDAP_OTHER;
 115                         refs = referral_rewrite( default_referral,
 116                                 NULL, dn, LDAP_SCOPE_DEFAULT );
 117                 }
 118
 119                 if( refs != NULL ) {
 120                         /* send referrals */
 121                         send_ldap_result( conn, op, rc = LDAP_REFERRAL,
 122                                 matched_dn, NULL, refs, NULL );
 123                         ber_bvarray_free( refs );
 124                 } else if ( rc != LDAP_SUCCESS ) {
 125                         send_ldap_result( conn, op, rc, matched_dn,
 126                                 matched_dn ? "bad referral object" : NULL,
 127                                 NULL, NULL );
 128                 }
 129
 130                 LOCK_ID_FREE ( bdb->bi_dbenv, locker );
 131                 free( matched_dn );
 132                 return rc;
 133         }
 134
 135         if ( is_entry_referral( e ) ) {
 136                 /* entry is a referral */
 137                 BerVarray refs = get_entry_referrals( be, conn, op, e );
 138                 BerVarray rrefs = referral_rewrite(
 139                         refs, &e->e_name, dn, LDAP_SCOPE_DEFAULT );
 140
 141 #ifdef NEW_LOGGING
 142                 LDAP_LOG (( "referral", LDAP_LEVEL_DETAIL1,
 143                         "bdb_referrals: op=%ld target=\"%s\" matched=\"%s\"\n",
 144                         (long) op->o_tag, dn->bv_val, e->e_dn ));
 145 #else
 146                 Debug( LDAP_DEBUG_TRACE,
 147                         "bdb_referrals: op=%ld target=\"%s\" matched=\"%s\"\n",
 148                         (long) op->o_tag, dn->bv_val, e->e_dn );
 149 #endif
 150
 151                 if( rrefs != NULL ) {
 152                         send_ldap_result( conn, op, rc = LDAP_REFERRAL,
 153                                 e->e_dn, NULL, rrefs, NULL );
 154                         ber_bvarray_free( rrefs );
 155                 } else {
 156                         send_ldap_result( conn, op, rc = LDAP_OTHER, e->e_dn,
 157                                 "bad referral object", NULL, NULL );
 158                 }
 159
 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 }