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