git.sur5r.net Git - openldap/blob - servers/slapd/back-meta/compare.c

   1 /* $OpenLDAP$ */
   2 /* This work is part of OpenLDAP Software <http://www.openldap.org/>.
   3  *
   4  * Copyright 1999-2005 The OpenLDAP Foundation.
   5  * Portions Copyright 2001-2003 Pierangelo Masarati.
   6  * Portions Copyright 1999-2003 Howard Chu.
   7  * All rights reserved.
   8  *
   9  * Redistribution and use in source and binary forms, with or without
  10  * modification, are permitted only as authorized by the OpenLDAP
  11  * Public License.
  12  *
  13  * A copy of this license is available in the file LICENSE in the
  14  * top-level directory of the distribution or, alternatively, at
  15  * <http://www.OpenLDAP.org/license.html>.
  16  */
  17 /* ACKNOWLEDGEMENTS:
  18  * This work was initially developed by the Howard Chu for inclusion
  19  * in OpenLDAP Software and subsequently enhanced by Pierangelo
  20  * Masarati.
  21  */
  22
  23 #include "portable.h"
  24
  25 #include <stdio.h>
  26
  27 #include <ac/string.h>
  28 #include <ac/socket.h>
  29
  30 #include "slap.h"
  31 #include "../back-ldap/back-ldap.h"
  32 #include "back-meta.h"
  33
  34 int
  35 meta_back_compare( Operation *op, SlapReply *rs )
  36 {
  37         struct metainfo         *li = ( struct metainfo * )op->o_bd->be_private;
  38         struct metaconn         *lc;
  39         struct metasingleconn   *lsc;
  40         char                    *match = NULL,
  41                                 *err = NULL;
  42         struct berval           mmatch = BER_BVNULL;
  43         int                     candidates = 0,
  44                                 last = 0,
  45                                 i,
  46                                 count = 0,
  47                                 rc,
  48                                 cres = LDAP_SUCCESS,
  49                                 rres = LDAP_SUCCESS,
  50                                 *msgid;
  51         dncookie                dc;
  52
  53         lc = meta_back_getconn( op, rs, META_OP_ALLOW_MULTIPLE,
  54                         &op->o_req_ndn, NULL, LDAP_BACK_SENDERR );
  55         if ( !lc || !meta_back_dobind( lc, op, LDAP_BACK_SENDERR ) ) {
  56                 return rs->sr_err;
  57         }
  58
  59         msgid = ch_calloc( sizeof( int ), li->ntargets );
  60         if ( msgid == NULL ) {
  61                 return -1;
  62         }
  63
  64         /*
  65          * start an asynchronous compare for each candidate target
  66          */
  67         dc.conn = op->o_conn;
  68         dc.rs = rs;
  69         dc.ctx = "compareDN";
  70
  71         for ( i = 0, lsc = lc->mc_conns; !META_LAST( lsc ); ++i, ++lsc ) {
  72                 struct berval mdn = BER_BVNULL;
  73                 struct berval mapped_attr = op->orc_ava->aa_desc->ad_cname;
  74                 struct berval mapped_value = op->orc_ava->aa_value;
  75
  76                 if ( lsc->msc_candidate != META_CANDIDATE ) {
  77                         msgid[ i ] = -1;
  78                         continue;
  79                 }
  80
  81                 /*
  82                  * Rewrite the compare dn, if needed
  83                  */
  84                 dc.rwmap = &li->targets[ i ]->mt_rwmap;
  85
  86                 switch ( ldap_back_dn_massage( &dc, &op->o_req_dn, &mdn ) ) {
  87                 case LDAP_UNWILLING_TO_PERFORM:
  88                         rc = 1;
  89                         goto finish;
  90
  91                 default:
  92                         break;
  93                 }
  94
  95                 /*
  96                  * if attr is objectClass, try to remap the value
  97                  */
  98                 if ( op->orc_ava->aa_desc == slap_schema.si_ad_objectClass ) {
  99                         ldap_back_map( &li->targets[ i ]->mt_rwmap.rwm_oc,
 100                                         &op->orc_ava->aa_value,
 101                                         &mapped_value, BACKLDAP_MAP );
 102
 103                         if ( mapped_value.bv_val == NULL || mapped_value.bv_val[0] == '\0' ) {
 104                                 continue;
 105                         }
 106                 /*
 107                  * else try to remap the attribute
 108                  */
 109                 } else {
 110                         ldap_back_map( &li->targets[ i ]->mt_rwmap.rwm_at,
 111                                 &op->orc_ava->aa_desc->ad_cname,
 112                                 &mapped_attr, BACKLDAP_MAP );
 113                         if ( mapped_attr.bv_val == NULL || mapped_attr.bv_val[0] == '\0' ) {
 114                                 continue;
 115                         }
 116
 117                         if ( op->orc_ava->aa_desc->ad_type->sat_syntax == slap_schema.si_syn_distinguishedName )
 118                         {
 119                                 dc.ctx = "compareAttrDN";
 120
 121                                 switch ( ldap_back_dn_massage( &dc, &op->orc_ava->aa_value, &mapped_value ) )
 122                                 {
 123                                 case LDAP_UNWILLING_TO_PERFORM:
 124                                         rc = 1;
 125                                         goto finish;
 126
 127                                 default:
 128                                         break;
 129                                 }
 130                         }
 131                 }
 132
 133                 /*
 134                  * the compare op is spawned across the targets and the first
 135                  * that returns determines the result; a constraint on unicity
 136                  * of the result ought to be enforced
 137                  */
 138                  rc = ldap_compare_ext( lc->mc_conns[ i ].msc_ld, mdn.bv_val,
 139                                 mapped_attr.bv_val, &mapped_value,
 140                                 op->o_ctrls, NULL, &msgid[ i ] );
 141
 142                 if ( mdn.bv_val != op->o_req_dn.bv_val ) {
 143                         free( mdn.bv_val );
 144                         BER_BVZERO( &mdn );
 145                 }
 146
 147                 if ( mapped_attr.bv_val != op->orc_ava->aa_desc->ad_cname.bv_val ) {
 148                         free( mapped_attr.bv_val );
 149                         BER_BVZERO( &mapped_attr );
 150                 }
 151
 152                 if ( mapped_value.bv_val != op->orc_ava->aa_value.bv_val ) {
 153                         free( mapped_value.bv_val );
 154                         BER_BVZERO( &mapped_value );
 155                 }
 156
 157                 if ( rc != LDAP_SUCCESS ) {
 158                         /* FIXME: what should we do with the error? */
 159                         continue;
 160                 }
 161
 162                 ++candidates;
 163         }
 164
 165         /*
 166          * wait for replies
 167          */
 168         for ( rc = 0, count = 0; candidates > 0; ) {
 169
 170                 /*
 171                  * FIXME: should we check for abandon?
 172                  */
 173                 for ( i = 0, lsc = lc->mc_conns; !META_LAST( lsc ); lsc++, i++ ) {
 174                         int             lrc;
 175                         LDAPMessage     *res = NULL;
 176
 177                         if ( msgid[ i ] == -1 ) {
 178                                 continue;
 179                         }
 180
 181                         lrc = ldap_result( lsc->msc_ld, msgid[ i ],
 182                                         0, NULL, &res );
 183
 184                         if ( lrc == 0 ) {
 185                                 /*
 186                                  * FIXME: should we yield?
 187                                  */
 188                                 if ( res ) {
 189                                         ldap_msgfree( res );
 190                                 }
 191                                 continue;
 192
 193                         } else if ( lrc == LDAP_RES_COMPARE ) {
 194                                 if ( count > 0 ) {
 195                                         rres = LDAP_OTHER;
 196                                         rc = -1;
 197                                         goto finish;
 198                                 }
 199
 200                                 rc = ldap_parse_result( lsc->msc_ld, res,
 201                                                 &rs->sr_err,
 202                                                 NULL, NULL, NULL, NULL, 1 );
 203                                 if ( rc != LDAP_SUCCESS ) {
 204                                         rres = rc;
 205                                         rc = -1;
 206                                         goto finish;
 207                                 }
 208
 209                                 switch ( rs->sr_err ) {
 210                                 case LDAP_COMPARE_TRUE:
 211                                 case LDAP_COMPARE_FALSE:
 212
 213                                         /*
 214                                          * true or flase, got it;
 215                                          * sending to cache ...
 216                                          */
 217                                         if ( li->cache.ttl != META_DNCACHE_DISABLED ) {
 218                                                 ( void )meta_dncache_update_entry( &li->cache, &op->o_req_ndn, i );
 219                                         }
 220
 221                                         count++;
 222                                         rc = 0;
 223                                         break;
 224
 225                                 default:
 226                                         rres = slap_map_api2result( rs );
 227
 228                                         if ( err != NULL ) {
 229                                                 free( err );
 230                                         }
 231                                         ldap_get_option( lsc->msc_ld,
 232                                                 LDAP_OPT_ERROR_STRING, &err );
 233
 234                                         if ( match != NULL ) {
 235                                                 free( match );
 236                                         }
 237                                         ldap_get_option( lsc->msc_ld,
 238                                                 LDAP_OPT_MATCHED_DN, &match );
 239
 240                                         last = i;
 241                                         break;
 242                                 }
 243                                 msgid[ i ] = -1;
 244                                 --candidates;
 245
 246                         } else {
 247                                 msgid[ i ] = -1;
 248                                 --candidates;
 249                                 if ( res ) {
 250                                         ldap_msgfree( res );
 251                                 }
 252                                 break;
 253                         }
 254                 }
 255         }
 256
 257 finish:;
 258
 259         /*
 260          * Rewrite the matched portion of the search base, if required
 261          *
 262          * FIXME: only the last one gets caught!
 263          */
 264         if ( count == 1 ) {
 265                 if ( match != NULL ) {
 266                         free( match );
 267                         match = NULL;
 268                 }
 269
 270                 /*
 271                  * the result of the compare is assigned to the res code
 272                  * that will be returned
 273                  */
 274                 rres = cres;
 275
 276                 /*
 277                  * At least one compare failed with matched portion,
 278                  * and none was successful
 279                  */
 280         } else if ( match != NULL &&  match[0] != '\0' ) {
 281                 struct berval matched;
 282
 283                 matched.bv_val = match;
 284                 matched.bv_len = strlen( match );
 285
 286                 dc.ctx = "matchedDN";
 287                 ldap_back_dn_massage( &dc, &matched, &mmatch );
 288         }
 289
 290         if ( rres != LDAP_SUCCESS ) {
 291                 rs->sr_err = rres;
 292         }
 293         rs->sr_matched = mmatch.bv_val;
 294         send_ldap_result( op, rs );
 295         rs->sr_matched = NULL;
 296
 297         if ( match != NULL ) {
 298                 if ( mmatch.bv_val != match ) {
 299                         free( mmatch.bv_val );
 300                 }
 301                 free( match );
 302         }
 303
 304         if ( msgid ) {
 305                 free( msgid );
 306         }
 307
 308         return rc;
 309 }
 310