/* $OpenLDAP: pkg/ldap/servers/slapd/compare.c,v 1.75.2.8 2003/02/10 19:22:46 kurt Exp $ */

/*

* Copyright 1998-2003 The OpenLDAP Foundation, All Rights Reserved.

* COPYING RESTRICTIONS APPLY, see COPYRIGHT file

*/

/*

* Copyright (c) 1995 Regents of the University of Michigan.

* All rights reserved.

*

* Redistribution and use in source and binary forms are permitted

* provided that this notice is preserved and that due credit is given

* to the University of Michigan at Ann Arbor. The name of the University

* may not be used to endorse or promote products derived from this

* software without specific prior written permission. This software

* is provided ``as is'' without express or implied warranty.

*/

#include "portable.h"

#include <stdio.h>

#include <ac/socket.h>

#include "ldap_pvt.h"

#include "slap.h"

#ifdef LDAP_SLAPI

#include "slapi.h"

#endif

static int compare_entry(

AttributeAssertion *ava );

int

do_compare(

Connection *conn,

Operation *op

)

{

Entry *entry = NULL;

Entry *fentry = NULL;

struct berval dn = { 0, NULL };

struct berval pdn = { 0, NULL };

struct berval ndn = { 0, NULL };

struct berval desc = { 0, NULL };

struct berval value = { 0, NULL };

AttributeAssertion ava = { NULL, { 0, NULL } };

Backend *be;

int rc = LDAP_SUCCESS;

const char *text = NULL;

int manageDSAit;

#ifdef LDAP_SLAPI

Slapi_PBlock *pb = op->o_pb;

#endif

ava.aa_desc = NULL;

#ifdef NEW_LOGGING

LDAP_LOG( OPERATION, ENTRY, "do_compare: conn %d\n", conn->c_connid, 0, 0 );

#else

Debug( LDAP_DEBUG_TRACE, "do_compare\n", 0, 0, 0 );

#endif

/*

* Parse the compare request. It looks like this:

*

* CompareRequest := [APPLICATION 14] SEQUENCE {

* entry DistinguishedName,

* ava SEQUENCE {

* type AttributeType,

* value AttributeValue

* }

* }

*/

if ( ber_scanf( op->o_ber, "{m" /*}*/, &dn ) == LBER_ERROR ) {

#ifdef NEW_LOGGING

LDAP_LOG( OPERATION, ERR,

"do_compare: conn %d ber_scanf failed\n", conn->c_connid, 0, 0 );

#else

Debug( LDAP_DEBUG_ANY, "ber_scanf failed\n", 0, 0, 0 );

#endif

send_ldap_disconnect( conn, op,

LDAP_PROTOCOL_ERROR, "decoding error" );

return SLAPD_DISCONNECT;

}

if ( ber_scanf( op->o_ber, "{mm}", &desc, &value ) == LBER_ERROR ) {

#ifdef NEW_LOGGING

LDAP_LOG( OPERATION, ERR,

"do_compare: conn %d get ava failed\n", conn->c_connid, 0, 0 );

#else

Debug( LDAP_DEBUG_ANY, "do_compare: get ava failed\n", 0, 0, 0 );

#endif

send_ldap_disconnect( conn, op,

LDAP_PROTOCOL_ERROR, "decoding error" );

rc = SLAPD_DISCONNECT;

goto cleanup;

}

if ( ber_scanf( op->o_ber, /*{*/ "}" ) == LBER_ERROR ) {

#ifdef NEW_LOGGING

LDAP_LOG( OPERATION, ERR,

"do_compare: conn %d ber_scanf failed\n", conn->c_connid, 0, 0 );

#else

Debug( LDAP_DEBUG_ANY, "ber_scanf failed\n", 0, 0, 0 );

#endif

send_ldap_disconnect( conn, op,

LDAP_PROTOCOL_ERROR, "decoding error" );

rc = SLAPD_DISCONNECT;

goto cleanup;

}

if( ( rc = get_ctrls( conn, op, 1 )) != LDAP_SUCCESS ) {

#ifdef NEW_LOGGING

LDAP_LOG( OPERATION, INFO,

"do_compare: conn %d get_ctrls failed\n", conn->c_connid, 0, 0 );

#else

Debug( LDAP_DEBUG_ANY, "do_compare: get_ctrls failed\n", 0, 0, 0 );

#endif

goto cleanup;

}

rc = dnPrettyNormal( NULL, &dn, &pdn, &ndn );

if( rc != LDAP_SUCCESS ) {

#ifdef NEW_LOGGING

LDAP_LOG( OPERATION, INFO,

"do_compare: conn %d invalid dn (%s)\n",

conn->c_connid, dn.bv_val, 0 );

#else

Debug( LDAP_DEBUG_ANY,

"do_compare: invalid dn (%s)\n", dn.bv_val, 0, 0 );

#endif

send_ldap_result( conn, op, rc = LDAP_INVALID_DN_SYNTAX, NULL,

"invalid DN", NULL, NULL );

goto cleanup;

}

rc = slap_bv2ad( &desc, &ava.aa_desc, &text );

if( rc != LDAP_SUCCESS ) {

send_ldap_result( conn, op, rc, NULL, text, NULL, NULL );

goto cleanup;

}

rc = value_validate_normalize( ava.aa_desc, SLAP_MR_EQUALITY,

&value, &ava.aa_value, &text );

if( rc != LDAP_SUCCESS ) {

send_ldap_result( conn, op, rc, NULL, text, NULL, NULL );

goto cleanup;

}

if( strcasecmp( ndn.bv_val, LDAP_ROOT_DSE ) == 0 ) {

#ifdef NEW_LOGGING

LDAP_LOG( OPERATION, ARGS,

"do_compare: dn (%s) attr(%s) value (%s)\n",

pdn.bv_val, ava.aa_desc->ad_cname.bv_val, ava.aa_value.bv_val );

#else

Debug( LDAP_DEBUG_ARGS, "do_compare: dn (%s) attr (%s) value (%s)\n",

pdn.bv_val, ava.aa_desc->ad_cname.bv_val, ava.aa_value.bv_val );

#endif

Statslog( LDAP_DEBUG_STATS,

"conn=%lu op=%lu CMP dn=\"%s\" attr=\"%s\"\n",

op->o_connid, op->o_opid, pdn.bv_val,

ava.aa_desc->ad_cname.bv_val, 0 );

rc = backend_check_restrictions( NULL, conn, op, NULL, &text ) ;

if( rc != LDAP_SUCCESS ) {

send_ldap_result( conn, op, rc, NULL, text, NULL, NULL );

goto cleanup;

}

rc = root_dse_info( conn, &entry, &text );

if( rc != LDAP_SUCCESS ) {

send_ldap_result( conn, op, rc, NULL, text, NULL, NULL );

goto cleanup;

}

fentry = entry;

} else if ( bvmatch( &ndn, &global_schemandn ) ) {

#ifdef NEW_LOGGING

LDAP_LOG( OPERATION, ARGS,

"do_compare: dn (%s) attr(%s) value (%s)\n",

pdn.bv_val, ava.aa_desc->ad_cname.bv_val,

ava.aa_value.bv_val );

#else

Debug( LDAP_DEBUG_ARGS, "do_compare: dn (%s) attr (%s) value (%s)\n",

pdn.bv_val, ava.aa_desc->ad_cname.bv_val, ava.aa_value.bv_val );

#endif

Statslog( LDAP_DEBUG_STATS,

"conn=%lu op=%lu CMP dn=\"%s\" attr=\"%s\"\n",

op->o_connid, op->o_opid, pdn.bv_val,

ava.aa_desc->ad_cname.bv_val, 0 );

rc = backend_check_restrictions( NULL, conn, op, NULL, &text ) ;

if( rc != LDAP_SUCCESS ) {

send_ldap_result( conn, op, rc, NULL, text, NULL, NULL );

rc = 0;

goto cleanup;

}

rc = schema_info( &entry, &text );

if( rc != LDAP_SUCCESS ) {

send_ldap_result( conn, op, rc, NULL, text, NULL, NULL );

rc = 0;

goto cleanup;

}

fentry = entry;

}

if( entry ) {

rc = compare_entry( conn, op, entry, &ava );

if( fentry) entry_free( fentry );

send_ldap_result( conn, op, rc, NULL, text, NULL, NULL );

if( rc == LDAP_COMPARE_TRUE || rc == LDAP_COMPARE_FALSE ) {

rc = 0;

}

goto cleanup;

}

manageDSAit = get_manageDSAit( op );

/*

* We could be serving multiple database backends. Select the

* appropriate one, or send a referral to our "referral server"

* if we don't hold it.

*/

if ( (be = select_backend( &ndn, manageDSAit, 0 )) == NULL ) {

BerVarray ref = referral_rewrite( default_referral,

NULL, &pdn, LDAP_SCOPE_DEFAULT );

send_ldap_result( conn, op, rc = LDAP_REFERRAL,

NULL, NULL, ref ? ref : default_referral, NULL );

ber_bvarray_free( ref );

rc = 0;

goto cleanup;

}

/* check restrictions */

rc = backend_check_restrictions( be, conn, op, NULL, &text ) ;

if( rc != LDAP_SUCCESS ) {

send_ldap_result( conn, op, rc,

NULL, text, NULL, NULL );

goto cleanup;

}

/* check for referrals */

rc = backend_check_referrals( be, conn, op, &pdn, &ndn );

if ( rc != LDAP_SUCCESS ) {

goto cleanup;

}

#ifdef NEW_LOGGING

LDAP_LOG( OPERATION, ARGS,

"do_compare: dn (%s) attr(%s) value (%s)\n",

pdn.bv_val, ava.aa_desc->ad_cname.bv_val, ava.aa_value.bv_val );

#else

Debug( LDAP_DEBUG_ARGS, "do_compare: dn (%s) attr (%s) value (%s)\n",

pdn.bv_val, ava.aa_desc->ad_cname.bv_val, ava.aa_value.bv_val );

#endif

Statslog( LDAP_DEBUG_STATS, "conn=%lu op=%lu CMP dn=\"%s\" attr=\"%s\"\n",

op->o_connid, op->o_opid, pdn.bv_val,

ava.aa_desc->ad_cname.bv_val, 0 );

#if defined( LDAP_SLAPI )

slapi_x_backend_set_pb( pb, be );

slapi_x_connection_set_pb( pb, conn );

slapi_x_operation_set_pb( pb, op );

slapi_pblock_set( pb, SLAPI_COMPARE_TARGET, (void *)dn.bv_val );

slapi_pblock_set( pb, SLAPI_MANAGEDSAIT, (void *)manageDSAit );

slapi_pblock_set( pb, SLAPI_COMPARE_TYPE, (void *)desc.bv_val );

slapi_pblock_set( pb, SLAPI_COMPARE_VALUE, (void *)&value );

rc = doPluginFNs( be, SLAPI_PLUGIN_PRE_COMPARE_FN, pb );

if ( rc != 0 ) {

/*

* A preoperation plugin failure will abort the

* entire operation.

*/

#ifdef NEW_LOGGING

LDAP_LOG( OPERATION, INFO, "do_compare: compare preoperation plugin "

"failed\n", 0, 0, 0);

#else

Debug(LDAP_DEBUG_TRACE, "do_compare: compare preoperation plugin "

"failed.\n", 0, 0, 0);

#endif

if ( slapi_pblock_get( pb, SLAPI_RESULT_CODE, (void *)&rc ) != 0)

rc = LDAP_OTHER;

goto cleanup;

}

#endif /* defined( LDAP_SLAPI ) */

if ( be->be_compare ) {

(*be->be_compare)( be, conn, op, &pdn, &ndn, &ava );

} else {

send_ldap_result( conn, op, rc = LDAP_UNWILLING_TO_PERFORM,

NULL, "operation not supported within namingContext",

NULL, NULL );

}

#if defined( LDAP_SLAPI )

if ( doPluginFNs( be, SLAPI_PLUGIN_POST_COMPARE_FN, pb ) != 0 ) {

#ifdef NEW_LOGGING

LDAP_LOG( OPERATION, INFO, "do_compare: compare postoperation plugins "

"failed\n", 0, 0, 0 );

#else

Debug(LDAP_DEBUG_TRACE, "do_compare: compare postoperation plugins "

"failed.\n", 0, 0, 0);

#endif

}

#endif /* defined( LDAP_SLAPI ) */

cleanup:

free( pdn.bv_val );

free( ndn.bv_val );

if ( ava.aa_value.bv_val ) free( ava.aa_value.bv_val );

return rc;

}

static int compare_entry(

AttributeAssertion *ava )

{

int rc = LDAP_NO_SUCH_ATTRIBUTE;

Attribute *a;

if ( ! access_allowed( NULL, conn, op, e,

ava->aa_desc, &ava->aa_value, ACL_COMPARE, NULL ) )

{

return LDAP_INSUFFICIENT_ACCESS;

}

for(a = attrs_find( e->e_attrs, ava->aa_desc );

a != NULL;

a = attrs_find( a->a_next, ava->aa_desc ))

{

rc = LDAP_COMPARE_FALSE;

if ( value_find( ava->aa_desc, a->a_vals, &ava->aa_value ) == 0 ) {

rc = LDAP_COMPARE_TRUE;

break;

}

}

return rc;

}