git.sur5r.net Git - openldap/blob - servers/slapd/compare.c

   1 /* $OpenLDAP$ */
   2 /*
   3  * Copyright 1998-2002 The OpenLDAP Foundation, All Rights Reserved.
   4  * COPYING RESTRICTIONS APPLY, see COPYRIGHT file
   5  */
   6 /*
   7  * Copyright (c) 1995 Regents of the University of Michigan.
   8  * All rights reserved.
   9  *
  10  * Redistribution and use in source and binary forms are permitted
  11  * provided that this notice is preserved and that due credit is given
  12  * to the University of Michigan at Ann Arbor. The name of the University
  13  * may not be used to endorse or promote products derived from this
  14  * software without specific prior written permission. This software
  15  * is provided ``as is'' without express or implied warranty.
  16  */
  17
  18 #include "portable.h"
  19
  20 #include <stdio.h>
  21 #include <ac/socket.h>
  22
  23 #include "ldap_pvt.h"
  24 #include "slap.h"
  25
  26 static int compare_entry(
  27         Connection *conn,
  28         Operation *op,
  29         Entry *e,
  30         AttributeAssertion *ava );
  31
  32 int
  33 do_compare(
  34     Connection  *conn,
  35     Operation   *op
  36 )
  37 {
  38         Entry *entry = NULL;
  39         struct berval dn = { 0, NULL };
  40         struct berval pdn = { 0, NULL };
  41         struct berval ndn = { 0, NULL };
  42         struct berval desc = { 0, NULL };
  43         struct berval value = { 0, NULL };
  44         AttributeAssertion ava;
  45         Backend *be;
  46         int rc = LDAP_SUCCESS;
  47         const char *text = NULL;
  48         int manageDSAit;
  49
  50         ava.aa_desc = NULL;
  51
  52 #ifdef NEW_LOGGING
  53         LDAP_LOG(( "operation", LDAP_LEVEL_ENTRY,
  54                 "do_compare: conn %d\n", conn->c_connid ));
  55 #else
  56         Debug( LDAP_DEBUG_TRACE, "do_compare\n", 0, 0, 0 );
  57 #endif
  58         /*
  59          * Parse the compare request.  It looks like this:
  60          *
  61          *      CompareRequest := [APPLICATION 14] SEQUENCE {
  62          *              entry   DistinguishedName,
  63          *              ava     SEQUENCE {
  64          *                      type    AttributeType,
  65          *                      value   AttributeValue
  66          *              }
  67          *      }
  68          */
  69
  70         if ( ber_scanf( op->o_ber, "{o" /*}*/, &dn ) == LBER_ERROR ) {
  71 #ifdef NEW_LOGGING
  72                 LDAP_LOG(( "operation", LDAP_LEVEL_ERR,
  73                         "do_compare: conn %d  ber_scanf failed\n", conn->c_connid ));
  74 #else
  75                 Debug( LDAP_DEBUG_ANY, "ber_scanf failed\n", 0, 0, 0 );
  76 #endif
  77                 send_ldap_disconnect( conn, op,
  78                         LDAP_PROTOCOL_ERROR, "decoding error" );
  79                 return SLAPD_DISCONNECT;
  80         }
  81
  82         if ( ber_scanf( op->o_ber, "{oo}", &desc, &value ) == LBER_ERROR ) {
  83 #ifdef NEW_LOGGING
  84                 LDAP_LOG(( "operation", LDAP_LEVEL_ERR,
  85                         "do_compare: conn %d  get ava failed\n", conn->c_connid ));
  86 #else
  87                 Debug( LDAP_DEBUG_ANY, "do_compare: get ava failed\n", 0, 0, 0 );
  88 #endif
  89                 send_ldap_disconnect( conn, op,
  90                         LDAP_PROTOCOL_ERROR, "decoding error" );
  91                 rc = SLAPD_DISCONNECT;
  92                 goto cleanup;
  93         }
  94
  95         if ( ber_scanf( op->o_ber, /*{*/ "}" ) == LBER_ERROR ) {
  96 #ifdef NEW_LOGGING
  97                 LDAP_LOG(( "operation", LDAP_LEVEL_ERR,
  98                         "do_compare: conn %d  ber_scanf failed\n", conn->c_connid ));
  99 #else
 100                 Debug( LDAP_DEBUG_ANY, "ber_scanf failed\n", 0, 0, 0 );
 101 #endif
 102                 send_ldap_disconnect( conn, op,
 103                         LDAP_PROTOCOL_ERROR, "decoding error" );
 104                 rc = SLAPD_DISCONNECT;
 105                 goto cleanup;
 106         }
 107
 108         if( ( rc = get_ctrls( conn, op, 1 )) != LDAP_SUCCESS ) {
 109 #ifdef NEW_LOGGING
 110                 LDAP_LOG(( "operation", LDAP_LEVEL_INFO,
 111                         "do_compare: conn %d  get_ctrls failed\n", conn->c_connid ));
 112 #else
 113                 Debug( LDAP_DEBUG_ANY, "do_compare: get_ctrls failed\n", 0, 0, 0 );
 114 #endif
 115                 goto cleanup;
 116         }
 117
 118         rc = dnPrettyNormal( NULL, &dn, &pdn, &ndn );
 119         if( rc != LDAP_SUCCESS ) {
 120 #ifdef NEW_LOGGING
 121                 LDAP_LOG(( "operation", LDAP_LEVEL_INFO,
 122                         "do_compare: conn %d  invalid dn (%s)\n",
 123                         conn->c_connid, dn.bv_val ));
 124 #else
 125                 Debug( LDAP_DEBUG_ANY,
 126                         "do_compare: invalid dn (%s)\n", dn.bv_val, 0, 0 );
 127 #endif
 128                 send_ldap_result( conn, op, rc = LDAP_INVALID_DN_SYNTAX, NULL,
 129                     "invalid DN", NULL, NULL );
 130                 goto cleanup;
 131         }
 132
 133         rc = slap_bv2ad( &desc, &ava.aa_desc, &text );
 134         if( rc != LDAP_SUCCESS ) {
 135                 send_ldap_result( conn, op, rc, NULL, text, NULL, NULL );
 136                 goto cleanup;
 137         }
 138
 139         rc = value_normalize( ava.aa_desc, SLAP_MR_EQUALITY, &value, &ava.aa_value, &text );
 140         if( rc != LDAP_SUCCESS ) {
 141                 send_ldap_result( conn, op, rc, NULL, text, NULL, NULL );
 142                 goto cleanup;
 143         }
 144
 145         if( strcasecmp( ndn.bv_val, LDAP_ROOT_DSE ) == 0 ) {
 146 #ifdef NEW_LOGGING
 147                 LDAP_LOG(( "operation", LDAP_LEVEL_ARGS,
 148                         "do_compare: conn %d  dn (%s) attr(%s) value (%s)\n",
 149                         conn->c_connid, pdn.bv_val,
 150                         ava.aa_desc->ad_cname.bv_val, ava.aa_value.bv_val ));
 151 #else
 152                 Debug( LDAP_DEBUG_ARGS, "do_compare: dn (%s) attr (%s) value (%s)\n",
 153                         pdn.bv_val, ava.aa_desc->ad_cname.bv_val, ava.aa_value.bv_val );
 154 #endif
 155
 156                 Statslog( LDAP_DEBUG_STATS,
 157                         "conn=%ld op=%d CMP dn=\"%s\" attr=\"%s\"\n",
 158                         op->o_connid, op->o_opid, pdn.bv_val,
 159                         ava.aa_desc->ad_cname.bv_val, 0 );
 160
 161                 rc = backend_check_restrictions( NULL, conn, op, NULL, &text ) ;
 162                 if( rc != LDAP_SUCCESS ) {
 163                         send_ldap_result( conn, op, rc, NULL, text, NULL, NULL );
 164                         goto cleanup;
 165                 }
 166
 167                 rc = root_dse_info( conn, &entry, &text );
 168                 if( rc != LDAP_SUCCESS ) {
 169                         send_ldap_result( conn, op, rc, NULL, text, NULL, NULL );
 170                         goto cleanup;
 171                 }
 172
 173         } else if ( strcasecmp( ndn.bv_val, SLAPD_SCHEMA_DN ) == 0 ) {
 174 #ifdef NEW_LOGGING
 175                 LDAP_LOG(( "operation", LDAP_LEVEL_ARGS,
 176                         "do_compare: conn %d  dn (%s) attr(%s) value (%s)\n",
 177                         conn->c_connid, pdn.bv_val, ava.aa_desc->ad_cname.bv_val,
 178                         ava.aa_value.bv_val ));
 179 #else
 180                 Debug( LDAP_DEBUG_ARGS, "do_compare: dn (%s) attr (%s) value (%s)\n",
 181                         pdn.bv_val, ava.aa_desc->ad_cname.bv_val, ava.aa_value.bv_val );
 182 #endif
 183
 184                 Statslog( LDAP_DEBUG_STATS,
 185                         "conn=%ld op=%d CMP dn=\"%s\" attr=\"%s\"\n",
 186                         op->o_connid, op->o_opid, pdn.bv_val,
 187                         ava.aa_desc->ad_cname.bv_val, 0 );
 188
 189                 rc = backend_check_restrictions( NULL, conn, op, NULL, &text ) ;
 190                 if( rc != LDAP_SUCCESS ) {
 191                         send_ldap_result( conn, op, rc, NULL, text, NULL, NULL );
 192                         rc = 0;
 193                         goto cleanup;
 194                 }
 195
 196                 rc = schema_info( &entry, &text );
 197                 if( rc != LDAP_SUCCESS ) {
 198                         send_ldap_result( conn, op, rc, NULL, text, NULL, NULL );
 199                         rc = 0;
 200                         goto cleanup;
 201                 }
 202         }
 203
 204         if( entry ) {
 205                 rc = compare_entry( conn, op, entry, &ava );
 206                 entry_free( entry );
 207
 208                 send_ldap_result( conn, op, rc, NULL, text, NULL, NULL );
 209
 210                 if( rc == LDAP_COMPARE_TRUE || rc == LDAP_COMPARE_FALSE ) {
 211                         rc = 0;
 212                 }
 213
 214                 goto cleanup;
 215         }
 216
 217         manageDSAit = get_manageDSAit( op );
 218
 219         /*
 220          * We could be serving multiple database backends.  Select the
 221          * appropriate one, or send a referral to our "referral server"
 222          * if we don't hold it.
 223          */
 224         if ( (be = select_backend( &ndn, manageDSAit, 0 )) == NULL ) {
 225                 BVarray ref = referral_rewrite( default_referral,
 226                         NULL, &pdn, LDAP_SCOPE_DEFAULT );
 227
 228                 send_ldap_result( conn, op, rc = LDAP_REFERRAL,
 229                         NULL, NULL, ref ? ref : default_referral, NULL );
 230
 231                 bvarray_free( ref );
 232                 rc = 0;
 233                 goto cleanup;
 234         }
 235
 236         /* check restrictions */
 237         rc = backend_check_restrictions( be, conn, op, NULL, &text ) ;
 238         if( rc != LDAP_SUCCESS ) {
 239                 send_ldap_result( conn, op, rc,
 240                         NULL, text, NULL, NULL );
 241                 goto cleanup;
 242         }
 243
 244         /* check for referrals */
 245         rc = backend_check_referrals( be, conn, op, &pdn, &ndn );
 246         if ( rc != LDAP_SUCCESS ) {
 247                 goto cleanup;
 248         }
 249
 250 #ifdef NEW_LOGGING
 251         LDAP_LOG(( "operation", LDAP_LEVEL_ARGS,
 252                 "do_compare: conn %d     dn (%s) attr(%s) value (%s)\n",
 253                 conn->c_connid, pdn.bv_val, ava.aa_desc->ad_cname.bv_val,
 254                 ava.aa_value.bv_val ));
 255 #else
 256         Debug( LDAP_DEBUG_ARGS, "do_compare: dn (%s) attr (%s) value (%s)\n",
 257             pdn.bv_val, ava.aa_desc->ad_cname.bv_val, ava.aa_value.bv_val );
 258 #endif
 259
 260         Statslog( LDAP_DEBUG_STATS, "conn=%ld op=%d CMP dn=\"%s\" attr=\"%s\"\n",
 261             op->o_connid, op->o_opid, pdn.bv_val,
 262                 ava.aa_desc->ad_cname.bv_val, 0 );
 263
 264
 265         /* deref suffix alias if appropriate */
 266         suffix_alias( be, &ndn );
 267
 268         if ( be->be_compare ) {
 269                 (*be->be_compare)( be, conn, op, &pdn, &ndn, &ava );
 270         } else {
 271                 send_ldap_result( conn, op, rc = LDAP_UNWILLING_TO_PERFORM,
 272                         NULL, "operation not supported within namingContext",
 273                         NULL, NULL );
 274         }
 275
 276 cleanup:
 277         free( dn.bv_val );
 278         free( pdn.bv_val );
 279         free( ndn.bv_val );
 280         free( desc.bv_val );
 281         free( value.bv_val );
 282
 283         return rc;
 284 }
 285
 286 static int compare_entry(
 287         Connection *conn,
 288         Operation *op,
 289         Entry *e,
 290         AttributeAssertion *ava )
 291 {
 292         int rc = LDAP_NO_SUCH_ATTRIBUTE;
 293         Attribute *a;
 294
 295         if ( ! access_allowed( NULL, conn, op, e,
 296                 ava->aa_desc, &ava->aa_value, ACL_COMPARE ) )
 297         {
 298                 return LDAP_INSUFFICIENT_ACCESS;
 299         }
 300
 301         for(a = attrs_find( e->e_attrs, ava->aa_desc );
 302                 a != NULL;
 303                 a = attrs_find( a->a_next, ava->aa_desc ))
 304         {
 305                 rc = LDAP_COMPARE_FALSE;
 306
 307                 if ( value_find( ava->aa_desc, a->a_vals, &ava->aa_value ) == 0 ) {
 308                         rc = LDAP_COMPARE_TRUE;
 309                         break;
 310                 }
 311         }
 312
 313         return rc;
 314 }