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 1999-2004 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 = { 0, NULL };
  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 = { 0, NULL };
  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
 119                 /*
 120                  * the compare op is spawned across the targets and the first
 121                  * that returns determines the result; a constraint on unicity
 122                  * of the result ought to be enforced
 123                  */
 124                 msgid[ i ] = ldap_compare( lc->conns[ i ].ld, mdn.bv_val,
 125                                 mapped_attr.bv_val, mapped_value.bv_val );
 126                 if ( mdn.bv_val != op->o_req_dn.bv_val ) {
 127                         free( mdn.bv_val );
 128                         mdn.bv_val = NULL;
 129                 }
 130                 if ( mapped_attr.bv_val != op->oq_compare.rs_ava->aa_desc->ad_cname.bv_val ) {
 131                         free( mapped_attr.bv_val );
 132                 }
 133                 if ( mapped_value.bv_val != op->oq_compare.rs_ava->aa_value.bv_val ) {
 134                         free( mapped_value.bv_val );
 135                 }
 136
 137                 if ( msgid[ i ] == -1 ) {
 138                         continue;
 139                 }
 140
 141                 ++candidates;
 142         }
 143
 144         /*
 145          * wait for replies
 146          */
 147         for ( rc = 0, count = 0; candidates > 0; ) {
 148
 149                 /*
 150                  * FIXME: should we check for abandon?
 151                  */
 152                 for ( i = 0, lsc = lc->conns; !META_LAST(lsc); lsc++, i++ ) {
 153                         int             lrc;
 154                         LDAPMessage     *res = NULL;
 155
 156                         if ( msgid[ i ] == -1 ) {
 157                                 continue;
 158                         }
 159
 160                         lrc = ldap_result( lsc->ld, msgid[ i ],
 161                                         0, NULL, &res );
 162
 163                         if ( lrc == 0 ) {
 164                                 /*
 165                                  * FIXME: should we yield?
 166                                  */
 167                                 if ( res ) {
 168                                         ldap_msgfree( res );
 169                                 }
 170                                 continue;
 171
 172                         } else if ( lrc == LDAP_RES_COMPARE ) {
 173                                 if ( count > 0 ) {
 174                                         rres = LDAP_OTHER;
 175                                         rc = -1;
 176                                         goto finish;
 177                                 }
 178
 179                                 rs->sr_err = ldap_result2error( lsc->ld, res, 1 );
 180                                 switch ( rs->sr_err ) {
 181                                 case LDAP_COMPARE_TRUE:
 182                                 case LDAP_COMPARE_FALSE:
 183
 184                                         /*
 185                                          * true or flase, got it;
 186                                          * sending to cache ...
 187                                          */
 188                                         if ( li->cache.ttl != META_DNCACHE_DISABLED ) {
 189                                                 ( void )meta_dncache_update_entry( &li->cache, &op->o_req_ndn, i );
 190                                         }
 191
 192                                         count++;
 193                                         rc = 0;
 194                                         break;
 195
 196                                 default:
 197                                         rres = ldap_back_map_result( rs );
 198
 199                                         if ( err != NULL ) {
 200                                                 free( err );
 201                                         }
 202                                         ldap_get_option( lsc->ld,
 203                                                 LDAP_OPT_ERROR_STRING, &err );
 204
 205                                         if ( match != NULL ) {
 206                                                 free( match );
 207                                         }
 208                                         ldap_get_option( lsc->ld,
 209                                                 LDAP_OPT_MATCHED_DN, &match );
 210
 211                                         last = i;
 212                                         break;
 213                                 }
 214                                 msgid[ i ] = -1;
 215                                 --candidates;
 216
 217                         } else {
 218                                 msgid[ i ] = -1;
 219                                 --candidates;
 220                                 if ( res ) {
 221                                         ldap_msgfree( res );
 222                                 }
 223                                 break;
 224                         }
 225                 }
 226         }
 227
 228 finish:;
 229
 230         /*
 231          * Rewrite the matched portion of the search base, if required
 232          *
 233          * FIXME: only the last one gets caught!
 234          */
 235         if ( count == 1 ) {
 236                 if ( match != NULL ) {
 237                         free( match );
 238                         match = NULL;
 239                 }
 240
 241                 /*
 242                  * the result of the compare is assigned to the res code
 243                  * that will be returned
 244                  */
 245                 rres = cres;
 246
 247                 /*
 248                  * At least one compare failed with matched portion,
 249                  * and none was successful
 250                  */
 251         } else if ( match != NULL &&  match[0] != '\0' ) {
 252                 struct berval matched;
 253
 254                 matched.bv_val = match;
 255                 matched.bv_len = strlen( match );
 256
 257                 dc.ctx = "matchedDN";
 258                 ldap_back_dn_massage( &dc, &matched, &mmatch );
 259         }
 260
 261         if ( rres != LDAP_SUCCESS ) {
 262                 rs->sr_err = rres;
 263         }
 264         rs->sr_matched = mmatch.bv_val;
 265         send_ldap_result( op, rs );
 266         rs->sr_matched = NULL;
 267
 268         if ( match != NULL ) {
 269                 if ( mmatch.bv_val != match ) {
 270                         free( mmatch.bv_val );
 271                 }
 272                 free( match );
 273         }
 274
 275         if ( msgid ) {
 276                 free( msgid );
 277         }
 278
 279         return rc;
 280 }
 281