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 1999-2006 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         metainfo_t              *mi = ( metainfo_t * )op->o_bd->be_private;
  38         metaconn_t              *mc = NULL;
  39         char                    *match = NULL,
  40                                 *err = NULL;
  41         struct berval           mmatch = BER_BVNULL;
  42         int                     ncandidates = 0,
  43                                 last = 0,
  44                                 i,
  45                                 count = 0,
  46                                 rc,
  47                                 cres = LDAP_SUCCESS,
  48                                 rres = LDAP_SUCCESS,
  49                                 *msgid;
  50         dncookie                dc;
  51
  52         SlapReply               *candidates = meta_back_candidates_get( op );
  53
  54         mc = meta_back_getconn( op, rs, NULL, LDAP_BACK_SENDERR );
  55         if ( !mc || !meta_back_dobind( op, rs, mc, LDAP_BACK_SENDERR ) ) {
  56                 return rs->sr_err;
  57         }
  58
  59         msgid = ch_calloc( sizeof( int ), mi->mi_ntargets );
  60         if ( msgid == NULL ) {
  61                 send_ldap_error( op, rs, LDAP_OTHER, NULL );
  62                 rc = LDAP_OTHER;
  63                 goto done;
  64         }
  65
  66         /*
  67          * start an asynchronous compare for each candidate target
  68          */
  69         dc.conn = op->o_conn;
  70         dc.rs = rs;
  71         dc.ctx = "compareDN";
  72
  73         for ( i = 0; i < mi->mi_ntargets; i++ ) {
  74                 struct berval           mdn = BER_BVNULL;
  75                 struct berval           mapped_attr = op->orc_ava->aa_desc->ad_cname;
  76                 struct berval           mapped_value = op->orc_ava->aa_value;
  77                 metatarget_t            *mt = mi->mi_targets[ i ];
  78                 LDAPControl             **ctrls = NULL;
  79
  80                 if ( ! META_IS_CANDIDATE( &candidates[ i ] ) ) {
  81                         msgid[ i ] = -1;
  82                         continue;
  83                 }
  84
  85                 /*
  86                  * Rewrite the compare dn, if needed
  87                  */
  88                 dc.target = mt;
  89
  90                 switch ( ldap_back_dn_massage( &dc, &op->o_req_dn, &mdn ) ) {
  91                 case LDAP_UNWILLING_TO_PERFORM:
  92                         rc = 1;
  93                         goto finish;
  94
  95                 default:
  96                         break;
  97                 }
  98
  99                 /*
 100                  * if attr is objectClass, try to remap the value
 101                  */
 102                 if ( op->orc_ava->aa_desc == slap_schema.si_ad_objectClass ) {
 103                         ldap_back_map( &mt->mt_rwmap.rwm_oc,
 104                                         &op->orc_ava->aa_value,
 105                                         &mapped_value, BACKLDAP_MAP );
 106
 107                         if ( BER_BVISNULL( &mapped_value ) || mapped_value.bv_val[0] == '\0' ) {
 108                                 continue;
 109                         }
 110                 /*
 111                  * else try to remap the attribute
 112                  */
 113                 } else {
 114                         ldap_back_map( &mt->mt_rwmap.rwm_at,
 115                                 &op->orc_ava->aa_desc->ad_cname,
 116                                 &mapped_attr, BACKLDAP_MAP );
 117                         if ( BER_BVISNULL( &mapped_attr ) || mapped_attr.bv_val[0] == '\0' ) {
 118                                 continue;
 119                         }
 120
 121                         if ( op->orc_ava->aa_desc->ad_type->sat_syntax == slap_schema.si_syn_distinguishedName )
 122                         {
 123                                 dc.ctx = "compareAttrDN";
 124
 125                                 switch ( ldap_back_dn_massage( &dc, &op->orc_ava->aa_value, &mapped_value ) )
 126                                 {
 127                                 case LDAP_UNWILLING_TO_PERFORM:
 128                                         rc = 1;
 129                                         goto finish;
 130
 131                                 default:
 132                                         break;
 133                                 }
 134                         }
 135                 }
 136
 137                 ctrls = op->o_ctrls;
 138                 if ( ldap_back_proxy_authz_ctrl( &mc->mc_conns[ i ].msc_bound_ndn,
 139                         mt->mt_version, &mt->mt_idassert, op, rs, &ctrls ) != LDAP_SUCCESS )
 140                 {
 141                         continue;
 142                 }
 143
 144                 /*
 145                  * the compare op is spawned across the targets and the first
 146                  * that returns determines the result; a constraint on unicity
 147                  * of the result ought to be enforced
 148                  */
 149                  rc = ldap_compare_ext( mc->mc_conns[ i ].msc_ld, mdn.bv_val,
 150                                 mapped_attr.bv_val, &mapped_value,
 151                                 ctrls, NULL, &msgid[ i ] );
 152
 153                 (void)ldap_back_proxy_authz_ctrl_free( op, &ctrls );
 154
 155                 if ( mdn.bv_val != op->o_req_dn.bv_val ) {
 156                         free( mdn.bv_val );
 157                         BER_BVZERO( &mdn );
 158                 }
 159
 160                 if ( mapped_attr.bv_val != op->orc_ava->aa_desc->ad_cname.bv_val ) {
 161                         free( mapped_attr.bv_val );
 162                         BER_BVZERO( &mapped_attr );
 163                 }
 164
 165                 if ( mapped_value.bv_val != op->orc_ava->aa_value.bv_val ) {
 166                         free( mapped_value.bv_val );
 167                         BER_BVZERO( &mapped_value );
 168                 }
 169
 170                 if ( rc != LDAP_SUCCESS ) {
 171                         /* FIXME: what should we do with the error? */
 172                         continue;
 173                 }
 174
 175                 ++ncandidates;
 176         }
 177
 178         /*
 179          * wait for replies
 180          */
 181         for ( rc = 0, count = 0; ncandidates > 0; ) {
 182
 183                 /*
 184                  * FIXME: should we check for abandon?
 185                  */
 186                 for ( i = 0; i < mi->mi_ntargets; i++ ) {
 187                         metasingleconn_t        *msc = &mc->mc_conns[ i ];
 188                         int                     lrc;
 189                         LDAPMessage             *res = NULL;
 190                         struct timeval          tv;
 191
 192                         LDAP_BACK_TV_SET( &tv );
 193
 194                         if ( msgid[ i ] == -1 ) {
 195                                 continue;
 196                         }
 197
 198                         lrc = ldap_result( msc->msc_ld, msgid[ i ],
 199                                         LDAP_MSG_ALL, &tv, &res );
 200
 201                         if ( lrc == 0 ) {
 202                                 assert( res == NULL );
 203                                 continue;
 204
 205                         } else if ( lrc == -1 ) {
 206                                 /* we do not retry in this case;
 207                                  * only for unique operations... */
 208                                 ldap_get_option( msc->msc_ld,
 209                                         LDAP_OPT_ERROR_NUMBER, &rs->sr_err );
 210                                 rres = slap_map_api2result( rs );
 211                                 rres = rc;
 212                                 rc = -1;
 213                                 goto finish;
 214
 215                         } else if ( lrc == LDAP_RES_COMPARE ) {
 216                                 if ( count > 0 ) {
 217                                         rres = LDAP_OTHER;
 218                                         rc = -1;
 219                                         goto finish;
 220                                 }
 221
 222                                 /* FIXME: matched? referrals? response controls? */
 223                                 rc = ldap_parse_result( msc->msc_ld, res,
 224                                                 &rs->sr_err,
 225                                                 NULL, NULL, NULL, NULL, 1 );
 226                                 if ( rc != LDAP_SUCCESS ) {
 227                                         rres = rc;
 228                                         rc = -1;
 229                                         goto finish;
 230                                 }
 231
 232                                 switch ( rs->sr_err ) {
 233                                 case LDAP_COMPARE_TRUE:
 234                                 case LDAP_COMPARE_FALSE:
 235
 236                                         /*
 237                                          * true or false, got it;
 238                                          * sending to cache ...
 239                                          */
 240                                         if ( mi->mi_cache.ttl != META_DNCACHE_DISABLED ) {
 241                                                 ( void )meta_dncache_update_entry( &mi->mi_cache, &op->o_req_ndn, i );
 242                                         }
 243
 244                                         count++;
 245                                         rc = 0;
 246                                         break;
 247
 248                                 default:
 249                                         rres = slap_map_api2result( rs );
 250
 251                                         if ( err != NULL ) {
 252                                                 free( err );
 253                                         }
 254                                         ldap_get_option( msc->msc_ld,
 255                                                 LDAP_OPT_ERROR_STRING, &err );
 256
 257                                         if ( match != NULL ) {
 258                                                 free( match );
 259                                         }
 260                                         ldap_get_option( msc->msc_ld,
 261                                                 LDAP_OPT_MATCHED_DN, &match );
 262
 263                                         last = i;
 264                                         break;
 265                                 }
 266                                 msgid[ i ] = -1;
 267                                 --ncandidates;
 268
 269                         } else {
 270                                 msgid[ i ] = -1;
 271                                 --ncandidates;
 272                                 if ( res ) {
 273                                         ldap_msgfree( res );
 274                                 }
 275                                 break;
 276                         }
 277                 }
 278         }
 279
 280 finish:;
 281
 282         /*
 283          * Rewrite the matched portion of the search base, if required
 284          *
 285          * FIXME: only the last one gets caught!
 286          */
 287         if ( count == 1 ) {
 288                 if ( match != NULL ) {
 289                         free( match );
 290                         match = NULL;
 291                 }
 292
 293                 /*
 294                  * the result of the compare is assigned to the res code
 295                  * that will be returned
 296                  */
 297                 rres = cres;
 298
 299                 /*
 300                  * At least one compare failed with matched portion,
 301                  * and none was successful
 302                  */
 303         } else if ( match != NULL && match[ 0 ] != '\0' ) {
 304                 struct berval matched, pmatched;
 305
 306                 ber_str2bv( match, 0, 0, &matched );
 307
 308                 dc.ctx = "matchedDN";
 309                 ldap_back_dn_massage( &dc, &matched, &mmatch );
 310                 if ( dnPretty( NULL, &mmatch, &pmatched, NULL ) == LDAP_SUCCESS ) {
 311                         if ( mmatch.bv_val != match ) {
 312                                 free( mmatch.bv_val );
 313                         }
 314                         mmatch = pmatched;
 315                 }
 316         }
 317
 318         if ( rres != LDAP_SUCCESS ) {
 319                 rs->sr_err = rres;
 320         }
 321         rs->sr_matched = mmatch.bv_val;
 322         send_ldap_result( op, rs );
 323         rs->sr_matched = NULL;
 324
 325         if ( match != NULL ) {
 326                 if ( mmatch.bv_val != match ) {
 327                         free( mmatch.bv_val );
 328                 }
 329                 free( match );
 330         }
 331
 332         if ( msgid ) {
 333                 free( msgid );
 334         }
 335
 336 done:;
 337         meta_back_release_conn( op, mc );
 338
 339         return rc;
 340 }
 341