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