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                 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
  78                 if ( candidates[ i ].sr_tag != META_CANDIDATE ) {
  79                         msgid[ i ] = -1;
  80                         continue;
  81                 }
  82
  83                 /*
  84                  * Rewrite the compare dn, if needed
  85                  */
  86                 dc.target = &mi->mi_targets[ i ];
  87
  88                 switch ( ldap_back_dn_massage( &dc, &op->o_req_dn, &mdn ) ) {
  89                 case LDAP_UNWILLING_TO_PERFORM:
  90                         rc = 1;
  91                         goto finish;
  92
  93                 default:
  94                         break;
  95                 }
  96
  97                 /*
  98                  * if attr is objectClass, try to remap the value
  99                  */
 100                 if ( op->orc_ava->aa_desc == slap_schema.si_ad_objectClass ) {
 101                         ldap_back_map( &mi->mi_targets[ i ].mt_rwmap.rwm_oc,
 102                                         &op->orc_ava->aa_value,
 103                                         &mapped_value, BACKLDAP_MAP );
 104
 105                         if ( BER_BVISNULL( &mapped_value ) || mapped_value.bv_val[0] == '\0' ) {
 106                                 continue;
 107                         }
 108                 /*
 109                  * else try to remap the attribute
 110                  */
 111                 } else {
 112                         ldap_back_map( &mi->mi_targets[ i ].mt_rwmap.rwm_at,
 113                                 &op->orc_ava->aa_desc->ad_cname,
 114                                 &mapped_attr, BACKLDAP_MAP );
 115                         if ( BER_BVISNULL( &mapped_attr ) || mapped_attr.bv_val[0] == '\0' ) {
 116                                 continue;
 117                         }
 118
 119                         if ( op->orc_ava->aa_desc->ad_type->sat_syntax == slap_schema.si_syn_distinguishedName )
 120                         {
 121                                 dc.ctx = "compareAttrDN";
 122
 123                                 switch ( ldap_back_dn_massage( &dc, &op->orc_ava->aa_value, &mapped_value ) )
 124                                 {
 125                                 case LDAP_UNWILLING_TO_PERFORM:
 126                                         rc = 1;
 127                                         goto finish;
 128
 129                                 default:
 130                                         break;
 131                                 }
 132                         }
 133                 }
 134
 135                 /*
 136                  * the compare op is spawned across the targets and the first
 137                  * that returns determines the result; a constraint on unicity
 138                  * of the result ought to be enforced
 139                  */
 140                  rc = ldap_compare_ext( mc->mc_conns[ i ].msc_ld, mdn.bv_val,
 141                                 mapped_attr.bv_val, &mapped_value,
 142                                 op->o_ctrls, NULL, &msgid[ i ] );
 143
 144                 if ( mdn.bv_val != op->o_req_dn.bv_val ) {
 145                         free( mdn.bv_val );
 146                         BER_BVZERO( &mdn );
 147                 }
 148
 149                 if ( mapped_attr.bv_val != op->orc_ava->aa_desc->ad_cname.bv_val ) {
 150                         free( mapped_attr.bv_val );
 151                         BER_BVZERO( &mapped_attr );
 152                 }
 153
 154                 if ( mapped_value.bv_val != op->orc_ava->aa_value.bv_val ) {
 155                         free( mapped_value.bv_val );
 156                         BER_BVZERO( &mapped_value );
 157                 }
 158
 159                 if ( rc != LDAP_SUCCESS ) {
 160                         /* FIXME: what should we do with the error? */
 161                         continue;
 162                 }
 163
 164                 ++ncandidates;
 165         }
 166
 167         /*
 168          * wait for replies
 169          */
 170         for ( rc = 0, count = 0; ncandidates > 0; ) {
 171
 172                 /*
 173                  * FIXME: should we check for abandon?
 174                  */
 175                 for ( i = 0; i < mi->mi_ntargets; i++ ) {
 176                         metasingleconn_t        *msc = &mc->mc_conns[ i ];
 177                         int                     lrc;
 178                         LDAPMessage             *res = NULL;
 179                         struct timeval          tv = { 0 };
 180
 181                         tv.tv_sec = 0;
 182                         tv.tv_usec = 100000;    /* 0.1 s */
 183
 184                         if ( msgid[ i ] == -1 ) {
 185                                 continue;
 186                         }
 187
 188                         lrc = ldap_result( msc->msc_ld, msgid[ i ],
 189                                         0, &tv, &res );
 190
 191                         if ( lrc == 0 ) {
 192                                 assert( res == NULL );
 193                                 continue;
 194
 195                         } else if ( lrc == -1 ) {
 196                                 /* we do not retry in this case;
 197                                  * only for unique operations... */
 198                                 ldap_get_option( msc->msc_ld,
 199                                         LDAP_OPT_ERROR_NUMBER, &rs->sr_err );
 200                                 rres = slap_map_api2result( rs );
 201                                 rres = rc;
 202                                 rc = -1;
 203                                 goto finish;
 204
 205                         } else if ( lrc == LDAP_RES_COMPARE ) {
 206                                 if ( count > 0 ) {
 207                                         rres = LDAP_OTHER;
 208                                         rc = -1;
 209                                         goto finish;
 210                                 }
 211
 212                                 rc = ldap_parse_result( msc->msc_ld, res,
 213                                                 &rs->sr_err,
 214                                                 NULL, NULL, NULL, NULL, 1 );
 215                                 if ( rc != LDAP_SUCCESS ) {
 216                                         rres = rc;
 217                                         rc = -1;
 218                                         goto finish;
 219                                 }
 220
 221                                 switch ( rs->sr_err ) {
 222                                 case LDAP_COMPARE_TRUE:
 223                                 case LDAP_COMPARE_FALSE:
 224
 225                                         /*
 226                                          * true or false, got it;
 227                                          * sending to cache ...
 228                                          */
 229                                         if ( mi->mi_cache.ttl != META_DNCACHE_DISABLED ) {
 230                                                 ( void )meta_dncache_update_entry( &mi->mi_cache, &op->o_req_ndn, i );
 231                                         }
 232
 233                                         count++;
 234                                         rc = 0;
 235                                         break;
 236
 237                                 default:
 238                                         rres = slap_map_api2result( rs );
 239
 240                                         if ( err != NULL ) {
 241                                                 free( err );
 242                                         }
 243                                         ldap_get_option( msc->msc_ld,
 244                                                 LDAP_OPT_ERROR_STRING, &err );
 245
 246                                         if ( match != NULL ) {
 247                                                 free( match );
 248                                         }
 249                                         ldap_get_option( msc->msc_ld,
 250                                                 LDAP_OPT_MATCHED_DN, &match );
 251
 252                                         last = i;
 253                                         break;
 254                                 }
 255                                 msgid[ i ] = -1;
 256                                 --ncandidates;
 257
 258                         } else {
 259                                 msgid[ i ] = -1;
 260                                 --ncandidates;
 261                                 if ( res ) {
 262                                         ldap_msgfree( res );
 263                                 }
 264                                 break;
 265                         }
 266                 }
 267         }
 268
 269 finish:;
 270
 271         /*
 272          * Rewrite the matched portion of the search base, if required
 273          *
 274          * FIXME: only the last one gets caught!
 275          */
 276         if ( count == 1 ) {
 277                 if ( match != NULL ) {
 278                         free( match );
 279                         match = NULL;
 280                 }
 281
 282                 /*
 283                  * the result of the compare is assigned to the res code
 284                  * that will be returned
 285                  */
 286                 rres = cres;
 287
 288                 /*
 289                  * At least one compare failed with matched portion,
 290                  * and none was successful
 291                  */
 292         } else if ( match != NULL && match[ 0 ] != '\0' ) {
 293                 struct berval matched, pmatched;
 294
 295                 ber_str2bv( match, 0, 0, &matched );
 296
 297                 dc.ctx = "matchedDN";
 298                 ldap_back_dn_massage( &dc, &matched, &mmatch );
 299                 if ( dnPretty( NULL, &mmatch, &pmatched, NULL ) == LDAP_SUCCESS ) {
 300                         if ( mmatch.bv_val != match ) {
 301                                 free( mmatch.bv_val );
 302                         }
 303                         mmatch = pmatched;
 304                 }
 305         }
 306
 307         if ( rres != LDAP_SUCCESS ) {
 308                 rs->sr_err = rres;
 309         }
 310         rs->sr_matched = mmatch.bv_val;
 311         send_ldap_result( op, rs );
 312         rs->sr_matched = NULL;
 313
 314         if ( match != NULL ) {
 315                 if ( mmatch.bv_val != match ) {
 316                         free( mmatch.bv_val );
 317                 }
 318                 free( match );
 319         }
 320
 321         if ( msgid ) {
 322                 free( msgid );
 323         }
 324
 325 done:;
 326         meta_back_release_conn( op, mc );
 327
 328         return rc;
 329 }
 330