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, *err = NULL;
  41         struct berval mmatch = BER_BVNULL;
  42         int candidates = 0, last = 0, i, count = 0, rc;
  43         int cres = LDAP_SUCCESS, rres = LDAP_SUCCESS;
  44         int *msgid;
  45         dncookie dc;
  46
  47         lc = meta_back_getconn( op, rs, META_OP_ALLOW_MULTIPLE,
  48                         &op->o_req_ndn, NULL );
  49         if ( !lc ) {
  50                 send_ldap_result( op, rs );
  51                 return -1;
  52         }
  53
  54         if ( !meta_back_dobind( lc, op ) ) {
  55                 rs->sr_err = LDAP_OTHER;
  56                 send_ldap_result( op, rs );
  57                 return -1;
  58         }
  59
  60         msgid = ch_calloc( sizeof( int ), li->ntargets );
  61         if ( msgid == NULL ) {
  62                 return -1;
  63         }
  64
  65         /*
  66          * start an asynchronous compare for each candidate target
  67          */
  68         dc.conn = op->o_conn;
  69         dc.rs = rs;
  70         dc.ctx = "compareDN";
  71
  72         for ( i = 0, lsc = lc->conns; !META_LAST(lsc); ++i, ++lsc ) {
  73                 struct berval mdn = BER_BVNULL;
  74                 struct berval mapped_attr = op->oq_compare.rs_ava->aa_desc->ad_cname;
  75                 struct berval mapped_value = op->oq_compare.rs_ava->aa_value;
  76
  77                 if ( lsc->candidate != META_CANDIDATE ) {
  78                         msgid[ i ] = -1;
  79                         continue;
  80                 }
  81
  82                 /*
  83                  * Rewrite the compare dn, if needed
  84                  */
  85                 dc.rwmap = &li->targets[ i ]->rwmap;
  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->oq_compare.rs_ava->aa_desc == slap_schema.si_ad_objectClass ) {
 100                         ldap_back_map( &li->targets[ i ]->rwmap.rwm_oc,
 101                                         &op->oq_compare.rs_ava->aa_value,
 102                                         &mapped_value, BACKLDAP_MAP );
 103
 104                         if ( mapped_value.bv_val == NULL || mapped_value.bv_val[0] == '\0' ) {
 105                                 continue;
 106                         }
 107                 /*
 108                  * else try to remap the attribute
 109                  */
 110                 } else {
 111                         ldap_back_map( &li->targets[ i ]->rwmap.rwm_at,
 112                                 &op->oq_compare.rs_ava->aa_desc->ad_cname,
 113                                 &mapped_attr, BACKLDAP_MAP );
 114                         if ( mapped_attr.bv_val == NULL || mapped_attr.bv_val[0] == '\0' ) {
 115                                 continue;
 116                         }
 117
 118                         if ( op->oq_compare.rs_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->oq_compare.rs_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                 msgid[ i ] = ldap_compare( lc->conns[ i ].ld, mdn.bv_val,
 140                                 mapped_attr.bv_val, mapped_value.bv_val );
 141
 142                 if ( mdn.bv_val != op->o_req_dn.bv_val ) {
 143                         free( mdn.bv_val );
 144                         mdn.bv_val = NULL;
 145                 }
 146
 147                 if ( mapped_attr.bv_val != op->oq_compare.rs_ava->aa_desc->ad_cname.bv_val ) {
 148                         free( mapped_attr.bv_val );
 149                 }
 150
 151                 if ( mapped_value.bv_val != op->oq_compare.rs_ava->aa_value.bv_val ) {
 152                         free( mapped_value.bv_val );
 153                 }
 154
 155                 if ( msgid[ i ] == -1 ) {
 156                         continue;
 157                 }
 158
 159                 ++candidates;
 160         }
 161
 162         /*
 163          * wait for replies
 164          */
 165         for ( rc = 0, count = 0; candidates > 0; ) {
 166
 167                 /*
 168                  * FIXME: should we check for abandon?
 169                  */
 170                 for ( i = 0, lsc = lc->conns; !META_LAST(lsc); lsc++, i++ ) {
 171                         int             lrc;
 172                         LDAPMessage     *res = NULL;
 173
 174                         if ( msgid[ i ] == -1 ) {
 175                                 continue;
 176                         }
 177
 178                         lrc = ldap_result( lsc->ld, msgid[ i ],
 179                                         0, NULL, &res );
 180
 181                         if ( lrc == 0 ) {
 182                                 /*
 183                                  * FIXME: should we yield?
 184                                  */
 185                                 if ( res ) {
 186                                         ldap_msgfree( res );
 187                                 }
 188                                 continue;
 189
 190                         } else if ( lrc == LDAP_RES_COMPARE ) {
 191                                 if ( count > 0 ) {
 192                                         rres = LDAP_OTHER;
 193                                         rc = -1;
 194                                         goto finish;
 195                                 }
 196
 197                                 rs->sr_err = ldap_result2error( lsc->ld, res, 1 );
 198                                 switch ( rs->sr_err ) {
 199                                 case LDAP_COMPARE_TRUE:
 200                                 case LDAP_COMPARE_FALSE:
 201
 202                                         /*
 203                                          * true or flase, got it;
 204                                          * sending to cache ...
 205                                          */
 206                                         if ( li->cache.ttl != META_DNCACHE_DISABLED ) {
 207                                                 ( void )meta_dncache_update_entry( &li->cache, &op->o_req_ndn, i );
 208                                         }
 209
 210                                         count++;
 211                                         rc = 0;
 212                                         break;
 213
 214                                 default:
 215                                         rres = slap_map_api2result( rs );
 216
 217                                         if ( err != NULL ) {
 218                                                 free( err );
 219                                         }
 220                                         ldap_get_option( lsc->ld,
 221                                                 LDAP_OPT_ERROR_STRING, &err );
 222
 223                                         if ( match != NULL ) {
 224                                                 free( match );
 225                                         }
 226                                         ldap_get_option( lsc->ld,
 227                                                 LDAP_OPT_MATCHED_DN, &match );
 228
 229                                         last = i;
 230                                         break;
 231                                 }
 232                                 msgid[ i ] = -1;
 233                                 --candidates;
 234
 235                         } else {
 236                                 msgid[ i ] = -1;
 237                                 --candidates;
 238                                 if ( res ) {
 239                                         ldap_msgfree( res );
 240                                 }
 241                                 break;
 242                         }
 243                 }
 244         }
 245
 246 finish:;
 247
 248         /*
 249          * Rewrite the matched portion of the search base, if required
 250          *
 251          * FIXME: only the last one gets caught!
 252          */
 253         if ( count == 1 ) {
 254                 if ( match != NULL ) {
 255                         free( match );
 256                         match = NULL;
 257                 }
 258
 259                 /*
 260                  * the result of the compare is assigned to the res code
 261                  * that will be returned
 262                  */
 263                 rres = cres;
 264
 265                 /*
 266                  * At least one compare failed with matched portion,
 267                  * and none was successful
 268                  */
 269         } else if ( match != NULL &&  match[0] != '\0' ) {
 270                 struct berval matched;
 271
 272                 matched.bv_val = match;
 273                 matched.bv_len = strlen( match );
 274
 275                 dc.ctx = "matchedDN";
 276                 ldap_back_dn_massage( &dc, &matched, &mmatch );
 277         }
 278
 279         if ( rres != LDAP_SUCCESS ) {
 280                 rs->sr_err = rres;
 281         }
 282         rs->sr_matched = mmatch.bv_val;
 283         send_ldap_result( op, rs );
 284         rs->sr_matched = NULL;
 285
 286         if ( match != NULL ) {
 287                 if ( mmatch.bv_val != match ) {
 288                         free( mmatch.bv_val );
 289                 }
 290                 free( match );
 291         }
 292
 293         if ( msgid ) {
 294                 free( msgid );
 295         }
 296
 297         return rc;
 298 }
 299