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

   1 /* $OpenLDAP$ */
   2 /*
   3  * Copyright 1998-2003 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 #include "slapi.h"
  26
  27 static int compare_entry(
  28         Connection *conn,
  29         Operation *op,
  30         Entry *e,
  31         AttributeAssertion *ava );
  32
  33 int
  34 do_compare(
  35     Connection  *conn,
  36     Operation   *op
  37 )
  38 {
  39         Entry *entry = NULL;
  40         Entry *fentry = NULL;
  41         struct berval dn = { 0, NULL };
  42         struct berval pdn = { 0, NULL };
  43         struct berval ndn = { 0, NULL };
  44         struct berval desc = { 0, NULL };
  45         struct berval value = { 0, NULL };
  46         AttributeAssertion ava = { NULL, { 0, NULL } };
  47         Backend *be;
  48         int rc = LDAP_SUCCESS;
  49         const char *text = NULL;
  50         int manageDSAit;
  51
  52         Slapi_PBlock *pb = op->o_pb;
  53
  54         ava.aa_desc = NULL;
  55
  56 #ifdef NEW_LOGGING
  57         LDAP_LOG( OPERATION, ENTRY, "do_compare: conn %d\n", conn->c_connid, 0, 0 );
  58 #else
  59         Debug( LDAP_DEBUG_TRACE, "do_compare\n", 0, 0, 0 );
  60 #endif
  61         /*
  62          * Parse the compare request.  It looks like this:
  63          *
  64          *      CompareRequest := [APPLICATION 14] SEQUENCE {
  65          *              entry   DistinguishedName,
  66          *              ava     SEQUENCE {
  67          *                      type    AttributeType,
  68          *                      value   AttributeValue
  69          *              }
  70          *      }
  71          */
  72
  73         if ( ber_scanf( op->o_ber, "{m" /*}*/, &dn ) == LBER_ERROR ) {
  74 #ifdef NEW_LOGGING
  75                 LDAP_LOG( OPERATION, ERR,
  76                         "do_compare: conn %d  ber_scanf failed\n", conn->c_connid, 0, 0 );
  77 #else
  78                 Debug( LDAP_DEBUG_ANY, "ber_scanf failed\n", 0, 0, 0 );
  79 #endif
  80                 send_ldap_disconnect( conn, op,
  81                         LDAP_PROTOCOL_ERROR, "decoding error" );
  82                 return SLAPD_DISCONNECT;
  83         }
  84
  85         if ( ber_scanf( op->o_ber, "{mm}", &desc, &value ) == LBER_ERROR ) {
  86 #ifdef NEW_LOGGING
  87                 LDAP_LOG( OPERATION, ERR,
  88                         "do_compare: conn %d  get ava failed\n", conn->c_connid, 0, 0 );
  89 #else
  90                 Debug( LDAP_DEBUG_ANY, "do_compare: get ava failed\n", 0, 0, 0 );
  91 #endif
  92                 send_ldap_disconnect( conn, op,
  93                         LDAP_PROTOCOL_ERROR, "decoding error" );
  94                 rc = SLAPD_DISCONNECT;
  95                 goto cleanup;
  96         }
  97
  98         if ( ber_scanf( op->o_ber, /*{*/ "}" ) == LBER_ERROR ) {
  99 #ifdef NEW_LOGGING
 100                 LDAP_LOG( OPERATION, ERR,
 101                         "do_compare: conn %d  ber_scanf failed\n", conn->c_connid, 0, 0 );
 102 #else
 103                 Debug( LDAP_DEBUG_ANY, "ber_scanf failed\n", 0, 0, 0 );
 104 #endif
 105                 send_ldap_disconnect( conn, op,
 106                         LDAP_PROTOCOL_ERROR, "decoding error" );
 107                 rc = SLAPD_DISCONNECT;
 108                 goto cleanup;
 109         }
 110
 111         if( ( rc = get_ctrls( conn, op, 1 )) != LDAP_SUCCESS ) {
 112 #ifdef NEW_LOGGING
 113                 LDAP_LOG( OPERATION, INFO,
 114                         "do_compare: conn %d  get_ctrls failed\n", conn->c_connid, 0, 0 );
 115 #else
 116                 Debug( LDAP_DEBUG_ANY, "do_compare: get_ctrls failed\n", 0, 0, 0 );
 117 #endif
 118                 goto cleanup;
 119         }
 120
 121         rc = dnPrettyNormal( NULL, &dn, &pdn, &ndn );
 122         if( rc != LDAP_SUCCESS ) {
 123 #ifdef NEW_LOGGING
 124                 LDAP_LOG( OPERATION, INFO,
 125                         "do_compare: conn %d  invalid dn (%s)\n",
 126                         conn->c_connid, dn.bv_val, 0 );
 127 #else
 128                 Debug( LDAP_DEBUG_ANY,
 129                         "do_compare: invalid dn (%s)\n", dn.bv_val, 0, 0 );
 130 #endif
 131                 send_ldap_result( conn, op, rc = LDAP_INVALID_DN_SYNTAX, NULL,
 132                     "invalid DN", NULL, NULL );
 133                 goto cleanup;
 134         }
 135
 136         rc = slap_bv2ad( &desc, &ava.aa_desc, &text );
 137         if( rc != LDAP_SUCCESS ) {
 138                 send_ldap_result( conn, op, rc, NULL, text, NULL, NULL );
 139                 goto cleanup;
 140         }
 141
 142         rc = value_validate_normalize( ava.aa_desc, SLAP_MR_EQUALITY,
 143                 &value, &ava.aa_value, &text );
 144         if( rc != LDAP_SUCCESS ) {
 145                 send_ldap_result( conn, op, rc, NULL, text, NULL, NULL );
 146                 goto cleanup;
 147         }
 148
 149         if( strcasecmp( ndn.bv_val, LDAP_ROOT_DSE ) == 0 ) {
 150 #ifdef NEW_LOGGING
 151                 LDAP_LOG( OPERATION, ARGS,
 152                         "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 #else
 155                 Debug( LDAP_DEBUG_ARGS, "do_compare: dn (%s) attr (%s) value (%s)\n",
 156                         pdn.bv_val, ava.aa_desc->ad_cname.bv_val, ava.aa_value.bv_val );
 157 #endif
 158
 159                 Statslog( LDAP_DEBUG_STATS,
 160                         "conn=%lu op=%lu CMP dn=\"%s\" attr=\"%s\"\n",
 161                         op->o_connid, op->o_opid, pdn.bv_val,
 162                         ava.aa_desc->ad_cname.bv_val, 0 );
 163
 164                 rc = backend_check_restrictions( NULL, conn, op, NULL, &text ) ;
 165                 if( rc != LDAP_SUCCESS ) {
 166                         send_ldap_result( conn, op, rc, NULL, text, NULL, NULL );
 167                         goto cleanup;
 168                 }
 169
 170                 rc = root_dse_info( conn, &entry, &text );
 171                 if( rc != LDAP_SUCCESS ) {
 172                         send_ldap_result( conn, op, rc, NULL, text, NULL, NULL );
 173                         goto cleanup;
 174                 }
 175
 176                 fentry = entry;
 177
 178         } else if ( bvmatch( &ndn, &global_schemandn ) ) {
 179 #ifdef NEW_LOGGING
 180                 LDAP_LOG( OPERATION, ARGS,
 181                         "do_compare: dn (%s) attr(%s) value (%s)\n",
 182                         pdn.bv_val, ava.aa_desc->ad_cname.bv_val,
 183                         ava.aa_value.bv_val );
 184 #else
 185                 Debug( LDAP_DEBUG_ARGS, "do_compare: dn (%s) attr (%s) value (%s)\n",
 186                         pdn.bv_val, ava.aa_desc->ad_cname.bv_val, ava.aa_value.bv_val );
 187 #endif
 188
 189                 Statslog( LDAP_DEBUG_STATS,
 190                         "conn=%lu op=%lu CMP dn=\"%s\" attr=\"%s\"\n",
 191                         op->o_connid, op->o_opid, pdn.bv_val,
 192                         ava.aa_desc->ad_cname.bv_val, 0 );
 193
 194                 rc = backend_check_restrictions( NULL, conn, op, NULL, &text ) ;
 195                 if( rc != LDAP_SUCCESS ) {
 196                         send_ldap_result( conn, op, rc, NULL, text, NULL, NULL );
 197                         rc = 0;
 198                         goto cleanup;
 199                 }
 200
 201                 rc = schema_info( &entry, &text );
 202                 if( rc != LDAP_SUCCESS ) {
 203                         send_ldap_result( conn, op, rc, NULL, text, NULL, NULL );
 204                         rc = 0;
 205                         goto cleanup;
 206                 }
 207                 fentry = entry;
 208         }
 209
 210         if( entry ) {
 211                 rc = compare_entry( conn, op, entry, &ava );
 212                 if( fentry) entry_free( fentry );
 213
 214                 send_ldap_result( conn, op, rc, NULL, text, NULL, NULL );
 215
 216                 if( rc == LDAP_COMPARE_TRUE || rc == LDAP_COMPARE_FALSE ) {
 217                         rc = 0;
 218                 }
 219
 220                 goto cleanup;
 221         }
 222
 223         manageDSAit = get_manageDSAit( op );
 224
 225         /*
 226          * We could be serving multiple database backends.  Select the
 227          * appropriate one, or send a referral to our "referral server"
 228          * if we don't hold it.
 229          */
 230         if ( (be = select_backend( &ndn, manageDSAit, 0 )) == NULL ) {
 231                 BerVarray ref = referral_rewrite( default_referral,
 232                         NULL, &pdn, LDAP_SCOPE_DEFAULT );
 233
 234                 send_ldap_result( conn, op, rc = LDAP_REFERRAL,
 235                         NULL, NULL, ref ? ref : default_referral, NULL );
 236
 237                 ber_bvarray_free( ref );
 238                 rc = 0;
 239                 goto cleanup;
 240         }
 241
 242         /* check restrictions */
 243         rc = backend_check_restrictions( be, conn, op, NULL, &text ) ;
 244         if( rc != LDAP_SUCCESS ) {
 245                 send_ldap_result( conn, op, rc,
 246                         NULL, text, NULL, NULL );
 247                 goto cleanup;
 248         }
 249
 250         /* check for referrals */
 251         rc = backend_check_referrals( be, conn, op, &pdn, &ndn );
 252         if ( rc != LDAP_SUCCESS ) {
 253                 goto cleanup;
 254         }
 255
 256 #ifdef NEW_LOGGING
 257         LDAP_LOG( OPERATION, ARGS,
 258                 "do_compare: dn (%s) attr(%s) value (%s)\n",
 259                 pdn.bv_val, ava.aa_desc->ad_cname.bv_val, ava.aa_value.bv_val );
 260 #else
 261         Debug( LDAP_DEBUG_ARGS, "do_compare: dn (%s) attr (%s) value (%s)\n",
 262             pdn.bv_val, ava.aa_desc->ad_cname.bv_val, ava.aa_value.bv_val );
 263 #endif
 264
 265         Statslog( LDAP_DEBUG_STATS, "conn=%lu op=%lu CMP dn=\"%s\" attr=\"%s\"\n",
 266             op->o_connid, op->o_opid, pdn.bv_val,
 267                 ava.aa_desc->ad_cname.bv_val, 0 );
 268
 269
 270         /* deref suffix alias if appropriate */
 271         suffix_alias( be, &ndn );
 272
 273 #if defined( LDAP_SLAPI )
 274         slapi_x_backend_set_pb( pb, be );
 275         slapi_x_connection_set_pb( pb, conn );
 276         slapi_x_operation_set_pb( pb, op );
 277         slapi_pblock_set( pb, SLAPI_COMPARE_TARGET, (void *)dn.bv_val );
 278         slapi_pblock_set( pb, SLAPI_MANAGEDSAIT, (void *)manageDSAit );
 279         slapi_pblock_set( pb, SLAPI_COMPARE_TYPE, (void *)desc.bv_val );
 280         slapi_pblock_set( pb, SLAPI_COMPARE_VALUE, (void *)&value );
 281
 282         rc = doPluginFNs( be, SLAPI_PLUGIN_PRE_COMPARE_FN, pb );
 283         if ( rc != 0 ) {
 284                 /*
 285                  * A preoperation plugin failure will abort the
 286                  * entire operation.
 287                  */
 288 #ifdef NEW_LOGGING
 289                 LDAP_LOG( OPERATION, INFO, "do_compare: compare preoperation plugin "
 290                                 "failed\n", 0, 0, 0);
 291 #else
 292                 Debug(LDAP_DEBUG_TRACE, "do_compare: compare preoperation plugin "
 293                                 "failed.\n", 0, 0, 0);
 294 #endif
 295                 if ( slapi_pblock_get( pb, SLAPI_RESULT_CODE, (void *)&rc ) != 0)
 296                         rc = LDAP_OTHER;
 297                 goto cleanup;
 298         }
 299 #endif /* defined( LDAP_SLAPI ) */
 300
 301         if ( be->be_compare ) {
 302                 (*be->be_compare)( be, conn, op, &pdn, &ndn, &ava );
 303         } else {
 304                 send_ldap_result( conn, op, rc = LDAP_UNWILLING_TO_PERFORM,
 305                         NULL, "operation not supported within namingContext",
 306                         NULL, NULL );
 307         }
 308
 309 #if defined( LDAP_SLAPI )
 310         if ( doPluginFNs( be, SLAPI_PLUGIN_POST_COMPARE_FN, pb ) != 0 ) {
 311 #ifdef NEW_LOGGING
 312                 LDAP_LOG( OPERATION, INFO, "do_compare: compare postoperation plugins "
 313                                 "failed\n", 0, 0, 0 );
 314 #else
 315                 Debug(LDAP_DEBUG_TRACE, "do_compare: compare postoperation plugins "
 316                                 "failed.\n", 0, 0, 0);
 317 #endif
 318         }
 319 #endif /* defined( LDAP_SLAPI ) */
 320
 321 cleanup:
 322         free( pdn.bv_val );
 323         free( ndn.bv_val );
 324         if ( ava.aa_value.bv_val ) free( ava.aa_value.bv_val );
 325
 326         return rc;
 327 }
 328
 329 static int compare_entry(
 330         Connection *conn,
 331         Operation *op,
 332         Entry *e,
 333         AttributeAssertion *ava )
 334 {
 335         int rc = LDAP_NO_SUCH_ATTRIBUTE;
 336         Attribute *a;
 337
 338         if ( ! access_allowed( NULL, conn, op, e,
 339                 ava->aa_desc, &ava->aa_value, ACL_COMPARE, NULL ) )
 340         {
 341                 return LDAP_INSUFFICIENT_ACCESS;
 342         }
 343
 344         for(a = attrs_find( e->e_attrs, ava->aa_desc );
 345                 a != NULL;
 346                 a = attrs_find( a->a_next, ava->aa_desc ))
 347         {
 348                 rc = LDAP_COMPARE_FALSE;
 349
 350                 if ( value_find( ava->aa_desc, a->a_vals, &ava->aa_value ) == 0 ) {
 351                         rc = LDAP_COMPARE_TRUE;
 352                         break;
 353                 }
 354         }
 355
 356         return rc;
 357 }