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

   1 /* $OpenLDAP$ */
   2 /*
   3  * Copyright 1998-2000 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         Attribute       *a = NULL;
  40         char    *dn = NULL, *ndn=NULL;
  41         struct berval desc;
  42         struct berval value;
  43         struct berval *nvalue;
  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         desc.bv_val = NULL;
  52         value.bv_val = NULL;
  53
  54 #ifdef NEW_LOGGING
  55         LDAP_LOG(( "operation", LDAP_LEVEL_ENTRY,
  56                    "do_compare: conn %d\n", conn->c_connid ));
  57 #else
  58         Debug( LDAP_DEBUG_TRACE, "do_compare\n", 0, 0, 0 );
  59 #endif
  60         /*
  61          * Parse the compare request.  It looks like this:
  62          *
  63          *      CompareRequest := [APPLICATION 14] SEQUENCE {
  64          *              entry   DistinguishedName,
  65          *              ava     SEQUENCE {
  66          *                      type    AttributeType,
  67          *                      value   AttributeValue
  68          *              }
  69          *      }
  70          */
  71
  72         if ( ber_scanf( op->o_ber, "{a" /*}*/, &dn ) == LBER_ERROR ) {
  73 #ifdef NEW_LOGGING
  74                 LDAP_LOG(( "operation", LDAP_LEVEL_ERR,
  75                            "do_compare: conn %d  ber_scanf failed\n", conn->c_connid ));
  76 #else
  77                 Debug( LDAP_DEBUG_ANY, "ber_scanf failed\n", 0, 0, 0 );
  78 #endif
  79                 send_ldap_disconnect( conn, op,
  80                         LDAP_PROTOCOL_ERROR, "decoding error" );
  81                 return SLAPD_DISCONNECT;
  82         }
  83
  84         if ( ber_scanf( op->o_ber, "{oo}", &desc, &value ) == LBER_ERROR ) {
  85 #ifdef NEW_LOGGING
  86                 LDAP_LOG(( "operation", LDAP_LEVEL_ERR,
  87                            "do_compare: conn %d  get ava failed\n", conn->c_connid ));
  88 #else
  89                 Debug( LDAP_DEBUG_ANY, "do_compare: get ava failed\n", 0, 0, 0 );
  90 #endif
  91                 send_ldap_disconnect( conn, op,
  92                         LDAP_PROTOCOL_ERROR, "decoding error" );
  93                 rc = SLAPD_DISCONNECT;
  94                 goto cleanup;
  95         }
  96
  97         if ( ber_scanf( op->o_ber, /*{*/ "}" ) == LBER_ERROR ) {
  98 #ifdef NEW_LOGGING
  99                 LDAP_LOG(( "operation", LDAP_LEVEL_ERR,
 100                            "do_compare: conn %d  ber_scanf failed\n", conn->c_connid ));
 101 #else
 102                 Debug( LDAP_DEBUG_ANY, "ber_scanf failed\n", 0, 0, 0 );
 103 #endif
 104                 send_ldap_disconnect( conn, op,
 105                         LDAP_PROTOCOL_ERROR, "decoding error" );
 106                 rc = SLAPD_DISCONNECT;
 107                 goto cleanup;
 108         }
 109
 110         if( ( rc = get_ctrls( conn, op, 1 )) != LDAP_SUCCESS ) {
 111 #ifdef NEW_LOGGING
 112                 LDAP_LOG(( "operation", LDAP_LEVEL_INFO,
 113                            "do_compare: conn %d  get_ctrls failed\n", conn->c_connid ));
 114 #else
 115                 Debug( LDAP_DEBUG_ANY, "do_compare: get_ctrls failed\n", 0, 0, 0 );
 116 #endif
 117                 goto cleanup;
 118         }
 119
 120         ndn = ch_strdup( dn );
 121
 122         if( dn_normalize( ndn ) == NULL ) {
 123 #ifdef NEW_LOGGING
 124                 LDAP_LOG(( "operation", LDAP_LEVEL_INFO,
 125                            "do_compare: conn %d  invalid dn (%s)\n",
 126                            conn->c_connid, dn ));
 127 #else
 128                 Debug( LDAP_DEBUG_ANY, "do_compare: invalid dn (%s)\n", dn, 0, 0 );
 129 #endif
 130                 send_ldap_result( conn, op, rc = LDAP_INVALID_DN_SYNTAX, NULL,
 131                     "invalid DN", NULL, NULL );
 132                 goto cleanup;
 133         }
 134
 135         rc = slap_bv2ad( &desc, &ava.aa_desc, &text );
 136         if( rc != LDAP_SUCCESS ) {
 137                 send_ldap_result( conn, op, rc, NULL, text, NULL, NULL );
 138                 return rc;
 139         }
 140
 141         rc = value_normalize( ava.aa_desc, SLAP_MR_EQUALITY, &value, &nvalue, &text );
 142         if( rc != LDAP_SUCCESS ) {
 143                 send_ldap_result( conn, op, rc, NULL, text, NULL, NULL );
 144                 return rc;
 145         }
 146
 147         ava.aa_value = nvalue;
 148
 149         if( strcasecmp( ndn, LDAP_ROOT_DSE ) == 0 ) {
 150 #ifdef NEW_LOGGING
 151                 LDAP_LOG(( "operation", LDAP_LEVEL_ARGS,
 152                         "do_compare: conn %d  dn (%s) attr(%s) value (%s)\n",
 153                         conn->c_connid, dn, ava.aa_desc->ad_cname.bv_val,
 154                         ava.aa_value->bv_val ));
 155 #else
 156                 Debug( LDAP_DEBUG_ARGS, "do_compare: dn (%s) attr (%s) value (%s)\n",
 157                         dn, ava.aa_desc->ad_cname.bv_val, ava.aa_value->bv_val );
 158 #endif
 159
 160                 Statslog( LDAP_DEBUG_STATS,
 161                         "conn=%ld op=%d CMP dn=\"%s\" attr=\"%s\"\n",
 162                         op->o_connid, op->o_opid, dn, 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         } else if ( strcasecmp( ndn, SLAPD_SCHEMA_DN ) == 0 ) {
 177 #ifdef NEW_LOGGING
 178                 LDAP_LOG(( "operation", LDAP_LEVEL_ARGS,
 179                         "do_compare: conn %d  dn (%s) attr(%s) value (%s)\n",
 180                         conn->c_connid, dn, ava.aa_desc->ad_cname->bv_val,
 181                         ava.aa_value->bv_val ));
 182 #else
 183                 Debug( LDAP_DEBUG_ARGS, "do_compare: dn (%s) attr (%s) value (%s)\n",
 184                         dn, ava.aa_desc->ad_cname.bv_val, ava.aa_value->bv_val );
 185 #endif
 186
 187                 Statslog( LDAP_DEBUG_STATS,
 188                         "conn=%ld op=%d CMP dn=\"%s\" attr=\"%s\"\n",
 189                         op->o_connid, op->o_opid, dn, ava.aa_desc->ad_cname.bv_val, 0 );
 190
 191                 rc = backend_check_restrictions( NULL, conn, op, NULL, &text ) ;
 192                 if( rc != LDAP_SUCCESS ) {
 193                         send_ldap_result( conn, op, rc, NULL, text, NULL, NULL );
 194                         rc = 0;
 195                         goto cleanup;
 196                 }
 197
 198                 rc = schema_info( &entry, &text );
 199                 if( rc != LDAP_SUCCESS ) {
 200                         send_ldap_result( conn, op, rc, NULL, text, NULL, NULL );
 201                         rc = 0;
 202                         goto cleanup;
 203                 }
 204         }
 205
 206         if( entry ) {
 207                 rc = compare_entry( conn, op, entry, &ava );
 208                 entry_free( entry );
 209
 210                 send_ldap_result( conn, op, rc, NULL, text, NULL, NULL );
 211
 212                 if( rc == LDAP_COMPARE_TRUE || rc == LDAP_COMPARE_FALSE ) {
 213                         rc = 0;
 214                 }
 215
 216                 goto cleanup;
 217         }
 218
 219         manageDSAit = get_manageDSAit( op );
 220
 221         /*
 222          * We could be serving multiple database backends.  Select the
 223          * appropriate one, or send a referral to our "referral server"
 224          * if we don't hold it.
 225          */
 226         if ( (be = select_backend( ndn, manageDSAit )) == NULL ) {
 227                 struct berval **ref = referral_rewrite( default_referral,
 228                         NULL, dn, LDAP_SCOPE_DEFAULT );
 229
 230                 send_ldap_result( conn, op, rc = LDAP_REFERRAL,
 231                         NULL, NULL, ref ? ref : default_referral, NULL );
 232
 233                 ber_bvecfree( ref );
 234                 rc = 0;
 235                 goto cleanup;
 236         }
 237
 238         /* check restrictions */
 239         rc = backend_check_restrictions( be, conn, op, NULL, &text ) ;
 240         if( rc != LDAP_SUCCESS ) {
 241                 send_ldap_result( conn, op, rc,
 242                         NULL, text, NULL, NULL );
 243                 goto cleanup;
 244         }
 245
 246         /* check for referrals */
 247         rc = backend_check_referrals( be, conn, op, dn, ndn );
 248         if ( rc != LDAP_SUCCESS ) {
 249                 goto cleanup;
 250         }
 251
 252 #ifdef NEW_LOGGING
 253         LDAP_LOG(( "operation", LDAP_LEVEL_ARGS,
 254                    "do_compare: conn %d  dn (%s) attr(%s) value (%s)\n",
 255                    conn->c_connid, dn, ava.aa_desc->ad_cname.bv_val,
 256                    ava.aa_value->bv_val ));
 257 #else
 258         Debug( LDAP_DEBUG_ARGS, "do_compare: dn (%s) attr (%s) value (%s)\n",
 259             dn, ava.aa_desc->ad_cname.bv_val, ava.aa_value->bv_val );
 260 #endif
 261
 262         Statslog( LDAP_DEBUG_STATS, "conn=%ld op=%d CMP dn=\"%s\" attr=\"%s\"\n",
 263             op->o_connid, op->o_opid, dn, ava.aa_desc->ad_cname.bv_val, 0 );
 264
 265
 266         /* deref suffix alias if appropriate */
 267         ndn = suffix_alias( be, ndn );
 268
 269         if ( be->be_compare ) {
 270                 (*be->be_compare)( be, conn, op, dn, ndn, &ava );
 271         } else {
 272                 send_ldap_result( conn, op, rc = LDAP_UNWILLING_TO_PERFORM,
 273                         NULL, "operation not supported within namingContext", NULL, NULL );
 274         }
 275
 276 cleanup:
 277         free( dn );
 278         free( ndn );
 279         free( desc.bv_val );
 280         free( value.bv_val );
 281
 282         return rc;
 283 }
 284
 285 static int compare_entry(
 286         Connection *conn,
 287         Operation *op,
 288         Entry *e,
 289         AttributeAssertion *ava )
 290 {
 291         int rc = LDAP_NO_SUCH_ATTRIBUTE;
 292         Attribute *a;
 293
 294         if ( ! access_allowed( NULL, conn, op, e,
 295                 ava->aa_desc, ava->aa_value, ACL_COMPARE ) )
 296         {
 297                 return LDAP_INSUFFICIENT_ACCESS;
 298         }
 299
 300         for(a = attrs_find( e->e_attrs, ava->aa_desc );
 301                 a != NULL;
 302                 a = attrs_find( a->a_next, ava->aa_desc ))
 303         {
 304                 rc = LDAP_COMPARE_FALSE;
 305
 306                 if ( value_find_ex( ava->aa_desc,
 307                         SLAP_MR_VALUE_IS_IN_MR_SYNTAX,
 308                         a->a_vals, ava->aa_value ) == 0 )
 309                 {
 310                         rc = LDAP_COMPARE_TRUE;
 311                         break;
 312                 }
 313         }
 314
 315         return rc;
 316 }