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 int
  27 do_compare(
  28     Connection  *conn,
  29     Operation   *op
  30 )
  31 {
  32         char    *dn = NULL, *ndn=NULL;
  33         struct berval desc;
  34         struct berval value;
  35         struct berval *nvalue;
  36         AttributeAssertion ava;
  37         Backend *be;
  38         int rc = LDAP_SUCCESS;
  39         const char *text = NULL;
  40         int manageDSAit;
  41
  42         ava.aa_desc = NULL;
  43         desc.bv_val = NULL;
  44         value.bv_val = NULL;
  45
  46 #ifdef NEW_LOGGING
  47         LDAP_LOG(( "operation", LDAP_LEVEL_ENTRY,
  48                    "do_compare: conn %d\n", conn->c_connid ));
  49 #else
  50         Debug( LDAP_DEBUG_TRACE, "do_compare\n", 0, 0, 0 );
  51 #endif
  52         /*
  53          * Parse the compare request.  It looks like this:
  54          *
  55          *      CompareRequest := [APPLICATION 14] SEQUENCE {
  56          *              entry   DistinguishedName,
  57          *              ava     SEQUENCE {
  58          *                      type    AttributeType,
  59          *                      value   AttributeValue
  60          *              }
  61          *      }
  62          */
  63
  64         if ( ber_scanf( op->o_ber, "{a" /*}*/, &dn ) == LBER_ERROR ) {
  65 #ifdef NEW_LOGGING
  66                 LDAP_LOG(( "operation", LDAP_LEVEL_ERR,
  67                            "do_compare: conn %d  ber_scanf failed\n", conn->c_connid ));
  68 #else
  69                 Debug( LDAP_DEBUG_ANY, "ber_scanf failed\n", 0, 0, 0 );
  70 #endif
  71                 send_ldap_disconnect( conn, op,
  72                         LDAP_PROTOCOL_ERROR, "decoding error" );
  73                 return SLAPD_DISCONNECT;
  74         }
  75
  76         if ( ber_scanf( op->o_ber, "{oo}", &desc, &value ) == LBER_ERROR ) {
  77 #ifdef NEW_LOGGING
  78                 LDAP_LOG(( "operation", LDAP_LEVEL_ERR,
  79                            "do_compare: conn %d  get ava failed\n", conn->c_connid ));
  80 #else
  81                 Debug( LDAP_DEBUG_ANY, "do_compare: get ava failed\n", 0, 0, 0 );
  82 #endif
  83                 send_ldap_disconnect( conn, op,
  84                         LDAP_PROTOCOL_ERROR, "decoding error" );
  85                 rc = SLAPD_DISCONNECT;
  86                 goto cleanup;
  87         }
  88
  89         if ( ber_scanf( op->o_ber, /*{*/ "}" ) == LBER_ERROR ) {
  90 #ifdef NEW_LOGGING
  91                 LDAP_LOG(( "operation", LDAP_LEVEL_ERR,
  92                            "do_compare: conn %d  ber_scanf failed\n", conn->c_connid ));
  93 #else
  94                 Debug( LDAP_DEBUG_ANY, "ber_scanf failed\n", 0, 0, 0 );
  95 #endif
  96                 send_ldap_disconnect( conn, op,
  97                         LDAP_PROTOCOL_ERROR, "decoding error" );
  98                 rc = SLAPD_DISCONNECT;
  99                 goto cleanup;
 100         }
 101
 102         if( ( rc = get_ctrls( conn, op, 1 )) != LDAP_SUCCESS ) {
 103 #ifdef NEW_LOGGING
 104                 LDAP_LOG(( "operation", LDAP_LEVEL_INFO,
 105                            "do_compare: conn %d  get_ctrls failed\n", conn->c_connid ));
 106 #else
 107                 Debug( LDAP_DEBUG_ANY, "do_compare: get_ctrls failed\n", 0, 0, 0 );
 108 #endif
 109                 goto cleanup;
 110         }
 111
 112         ndn = ch_strdup( dn );
 113
 114         if( dn_normalize( ndn ) == NULL ) {
 115 #ifdef NEW_LOGGING
 116                 LDAP_LOG(( "operation", LDAP_LEVEL_INFO,
 117                            "do_compare: conn %d  invalid dn (%s)\n",
 118                            conn->c_connid, dn ));
 119 #else
 120                 Debug( LDAP_DEBUG_ANY, "do_compare: invalid dn (%s)\n", dn, 0, 0 );
 121 #endif
 122                 send_ldap_result( conn, op, rc = LDAP_INVALID_DN_SYNTAX, NULL,
 123                     "invalid DN", NULL, NULL );
 124                 goto cleanup;
 125         }
 126
 127         if( *ndn == '\0' ) {
 128 #ifdef NEW_LOGGING
 129                 LDAP_LOG(( "operation", LDAP_LEVEL_DETAIL1,
 130                            "do_compare: conn %d  compare to root DSE!\n",
 131                            conn->c_connid ));
 132 #else
 133                 Debug( LDAP_DEBUG_ANY, "do_compare: root dse!\n", 0, 0, 0 );
 134 #endif
 135                 send_ldap_result( conn, op, rc = LDAP_UNWILLING_TO_PERFORM,
 136                         NULL, "compare upon the root DSE not supported", NULL, NULL );
 137                 goto cleanup;
 138         }
 139
 140         manageDSAit = get_manageDSAit( op );
 141
 142         /*
 143          * We could be serving multiple database backends.  Select the
 144          * appropriate one, or send a referral to our "referral server"
 145          * if we don't hold it.
 146          */
 147         if ( (be = select_backend( ndn, manageDSAit )) == NULL ) {
 148                 send_ldap_result( conn, op, rc = LDAP_REFERRAL,
 149                         NULL, NULL, default_referral, NULL );
 150                 rc = 1;
 151                 goto cleanup;
 152         }
 153
 154         /* check restrictions */
 155         rc = backend_check_restrictions( be, conn, op, NULL, &text ) ;
 156         if( rc != LDAP_SUCCESS ) {
 157                 send_ldap_result( conn, op, rc,
 158                         NULL, text, NULL, NULL );
 159                 goto cleanup;
 160         }
 161
 162         /* check for referrals */
 163         rc = backend_check_referrals( be, conn, op, dn, ndn );
 164         if ( rc != LDAP_SUCCESS ) {
 165                 goto cleanup;
 166         }
 167
 168         rc = slap_bv2ad( &desc, &ava.aa_desc, &text );
 169         if( rc != LDAP_SUCCESS ) {
 170                 send_ldap_result( conn, op, rc, NULL,
 171                     text, NULL, NULL );
 172                 goto cleanup;
 173         }
 174
 175         if( !ava.aa_desc->ad_type->sat_equality ) {
 176                 /* no equality matching rule */
 177                 send_ldap_result( conn, op, rc = LDAP_INAPPROPRIATE_MATCHING, NULL,
 178                     "no equality matching rule defined", NULL, NULL );
 179                 goto cleanup;
 180         }
 181
 182         rc = value_normalize( ava.aa_desc, SLAP_MR_EQUALITY, &value, &nvalue, &text );
 183
 184         if( rc != LDAP_SUCCESS ) {
 185                 send_ldap_result( conn, op, rc, NULL,
 186                     text, NULL, NULL );
 187                 goto cleanup;
 188         }
 189
 190         ava.aa_value = nvalue;
 191
 192 #ifdef NEW_LOGGING
 193         LDAP_LOG(( "operation", LDAP_LEVEL_ARGS,
 194                    "do_compare: conn %d  dn (%s) attr(%s) value (%s)\n",
 195                    conn->c_connid, dn, ava.aa_desc->ad_cname->bv_val,
 196                    ava.aa_value->bv_val ));
 197 #else
 198         Debug( LDAP_DEBUG_ARGS, "do_compare: dn (%s) attr (%s) value (%s)\n",
 199             dn, ava.aa_desc->ad_cname->bv_val, ava.aa_value->bv_val );
 200 #endif
 201
 202         Statslog( LDAP_DEBUG_STATS, "conn=%ld op=%d CMP dn=\"%s\" attr=\"%s\"\n",
 203             op->o_connid, op->o_opid, dn, ava.aa_desc->ad_cname->bv_val, 0 );
 204
 205
 206         /* deref suffix alias if appropriate */
 207         ndn = suffix_alias( be, ndn );
 208
 209         if ( be->be_compare ) {
 210                 (*be->be_compare)( be, conn, op, dn, ndn, &ava );
 211         } else {
 212                 send_ldap_result( conn, op, rc = LDAP_UNWILLING_TO_PERFORM,
 213                         NULL, "operation not supported within namingContext", NULL, NULL );
 214         }
 215
 216 cleanup:
 217         free( dn );
 218         free( ndn );
 219         free( desc.bv_val );
 220         free( value.bv_val );
 221         if( ava.aa_desc != NULL ) {
 222                 ad_free( ava.aa_desc, 1 );
 223         }
 224
 225         return rc;
 226 }