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 );
  55         if ( !lc ) {
  56                 send_ldap_result( op, rs );
  57                 return -1;
  58         }
  59
  60         if ( !meta_back_dobind( lc, op ) ) {
  61                 rs->sr_err = LDAP_OTHER;
  62                 send_ldap_result( op, rs );
  63                 return -1;
  64         }
  65
  66         msgid = ch_calloc( sizeof( int ), li->ntargets );
  67         if ( msgid == NULL ) {
  68                 return -1;
  69         }
  70
  71         /*
  72          * start an asynchronous compare for each candidate target
  73          */
  74         dc.conn = op->o_conn;
  75         dc.rs = rs;
  76         dc.ctx = "compareDN";
  77
  78         for ( i = 0, lsc = lc->mc_conns; !META_LAST( lsc ); ++i, ++lsc ) {
  79                 struct berval mdn = BER_BVNULL;
  80                 struct berval mapped_attr = op->orc_ava->aa_desc->ad_cname;
  81                 struct berval mapped_value = op->orc_ava->aa_value;
  82
  83                 if ( lsc->msc_candidate != META_CANDIDATE ) {
  84                         msgid[ i ] = -1;
  85                         continue;
  86                 }
  87
  88                 /*
  89                  * Rewrite the compare dn, if needed
  90                  */
  91                 dc.rwmap = &li->targets[ i ]->mt_rwmap;
  92
  93                 switch ( ldap_back_dn_massage( &dc, &op->o_req_dn, &mdn ) ) {
  94                 case LDAP_UNWILLING_TO_PERFORM:
  95                         rc = 1;
  96                         goto finish;
  97
  98                 default:
  99                         break;
 100                 }
 101
 102                 /*
 103                  * if attr is objectClass, try to remap the value
 104                  */
 105                 if ( op->orc_ava->aa_desc == slap_schema.si_ad_objectClass ) {
 106                         ldap_back_map( &li->targets[ i ]->mt_rwmap.rwm_oc,
 107                                         &op->orc_ava->aa_value,
 108                                         &mapped_value, BACKLDAP_MAP );
 109
 110                         if ( mapped_value.bv_val == NULL || mapped_value.bv_val[0] == '\0' ) {
 111                                 continue;
 112                         }
 113                 /*
 114                  * else try to remap the attribute
 115                  */
 116                 } else {
 117                         ldap_back_map( &li->targets[ i ]->mt_rwmap.rwm_at,
 118                                 &op->orc_ava->aa_desc->ad_cname,
 119                                 &mapped_attr, BACKLDAP_MAP );
 120                         if ( mapped_attr.bv_val == NULL || mapped_attr.bv_val[0] == '\0' ) {
 121                                 continue;
 122                         }
 123
 124                         if ( op->orc_ava->aa_desc->ad_type->sat_syntax == slap_schema.si_syn_distinguishedName )
 125                         {
 126                                 dc.ctx = "compareAttrDN";
 127
 128                                 switch ( ldap_back_dn_massage( &dc, &op->orc_ava->aa_value, &mapped_value ) )
 129                                 {
 130                                 case LDAP_UNWILLING_TO_PERFORM:
 131                                         rc = 1;
 132                                         goto finish;
 133
 134                                 default:
 135                                         break;
 136                                 }
 137                         }
 138                 }
 139
 140                 /*
 141                  * the compare op is spawned across the targets and the first
 142                  * that returns determines the result; a constraint on unicity
 143                  * of the result ought to be enforced
 144                  */
 145                  rc = ldap_compare_ext( lc->mc_conns[ i ].msc_ld, mdn.bv_val,
 146                                 mapped_attr.bv_val, &mapped_value,
 147                                 NULL, NULL, &msgid[ i ] );
 148
 149                 if ( mdn.bv_val != op->o_req_dn.bv_val ) {
 150                         free( mdn.bv_val );
 151                         BER_BVZERO( &mdn );
 152                 }
 153
 154                 if ( mapped_attr.bv_val != op->orc_ava->aa_desc->ad_cname.bv_val ) {
 155                         free( mapped_attr.bv_val );
 156                         BER_BVZERO( &mapped_attr );
 157                 }
 158
 159                 if ( mapped_value.bv_val != op->orc_ava->aa_value.bv_val ) {
 160                         free( mapped_value.bv_val );
 161                         BER_BVZERO( &mapped_value );
 162                 }
 163
 164                 if ( rc != LDAP_SUCCESS ) {
 165                         /* FIXME: what should we do with the error? */
 166                         continue;
 167                 }
 168
 169                 ++candidates;
 170         }
 171
 172         /*
 173          * wait for replies
 174          */
 175         for ( rc = 0, count = 0; candidates > 0; ) {
 176
 177                 /*
 178                  * FIXME: should we check for abandon?
 179                  */
 180                 for ( i = 0, lsc = lc->mc_conns; !META_LAST( lsc ); lsc++, i++ ) {
 181                         int             lrc;
 182                         LDAPMessage     *res = NULL;
 183
 184                         if ( msgid[ i ] == -1 ) {
 185                                 continue;
 186                         }
 187
 188                         lrc = ldap_result( lsc->msc_ld, msgid[ i ],
 189                                         0, NULL, &res );
 190
 191                         if ( lrc == 0 ) {
 192                                 /*
 193                                  * FIXME: should we yield?
 194                                  */
 195                                 if ( res ) {
 196                                         ldap_msgfree( res );
 197                                 }
 198                                 continue;
 199
 200                         } else if ( lrc == LDAP_RES_COMPARE ) {
 201                                 if ( count > 0 ) {
 202                                         rres = LDAP_OTHER;
 203                                         rc = -1;
 204                                         goto finish;
 205                                 }
 206
 207                                 rc = ldap_parse_result( lsc->msc_ld, res,
 208                                                 &rs->sr_err,
 209                                                 NULL, NULL, NULL, NULL, 1 );
 210                                 if ( rc != LDAP_SUCCESS ) {
 211                                         rres = rc;
 212                                         rc = -1;
 213                                         goto finish;
 214                                 }
 215
 216                                 switch ( rs->sr_err ) {
 217                                 case LDAP_COMPARE_TRUE:
 218                                 case LDAP_COMPARE_FALSE:
 219
 220                                         /*
 221                                          * true or flase, got it;
 222                                          * sending to cache ...
 223                                          */
 224                                         if ( li->cache.ttl != META_DNCACHE_DISABLED ) {
 225                                                 ( void )meta_dncache_update_entry( &li->cache, &op->o_req_ndn, i );
 226                                         }
 227
 228                                         count++;
 229                                         rc = 0;
 230                                         break;
 231
 232                                 default:
 233                                         rres = slap_map_api2result( rs );
 234
 235                                         if ( err != NULL ) {
 236                                                 free( err );
 237                                         }
 238                                         ldap_get_option( lsc->msc_ld,
 239                                                 LDAP_OPT_ERROR_STRING, &err );
 240
 241                                         if ( match != NULL ) {
 242                                                 free( match );
 243                                         }
 244                                         ldap_get_option( lsc->msc_ld,
 245                                                 LDAP_OPT_MATCHED_DN, &match );
 246
 247                                         last = i;
 248                                         break;
 249                                 }
 250                                 msgid[ i ] = -1;
 251                                 --candidates;
 252
 253                         } else {
 254                                 msgid[ i ] = -1;
 255                                 --candidates;
 256                                 if ( res ) {
 257                                         ldap_msgfree( res );
 258                                 }
 259                                 break;
 260                         }
 261                 }
 262         }
 263
 264 finish:;
 265
 266         /*
 267          * Rewrite the matched portion of the search base, if required
 268          *
 269          * FIXME: only the last one gets caught!
 270          */
 271         if ( count == 1 ) {
 272                 if ( match != NULL ) {
 273                         free( match );
 274                         match = NULL;
 275                 }
 276
 277                 /*
 278                  * the result of the compare is assigned to the res code
 279                  * that will be returned
 280                  */
 281                 rres = cres;
 282
 283                 /*
 284                  * At least one compare failed with matched portion,
 285                  * and none was successful
 286                  */
 287         } else if ( match != NULL &&  match[0] != '\0' ) {
 288                 struct berval matched;
 289
 290                 matched.bv_val = match;
 291                 matched.bv_len = strlen( match );
 292
 293                 dc.ctx = "matchedDN";
 294                 ldap_back_dn_massage( &dc, &matched, &mmatch );
 295         }
 296
 297         if ( rres != LDAP_SUCCESS ) {
 298                 rs->sr_err = rres;
 299         }
 300         rs->sr_matched = mmatch.bv_val;
 301         send_ldap_result( op, rs );
 302         rs->sr_matched = NULL;
 303
 304         if ( match != NULL ) {
 305                 if ( mmatch.bv_val != match ) {
 306                         free( mmatch.bv_val );
 307                 }
 308                 free( match );
 309         }
 310
 311         if ( msgid ) {
 312                 free( msgid );
 313         }
 314
 315         return rc;
 316 }
 317