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/** BEGIN COPYRIGHT BLOCK
* This Program is free software; you can redistribute it and/or modify it under
* the terms of the GNU General Public License as published by the Free Software
* Foundation; version 2 of the License.
*
* This Program is distributed in the hope that it will be useful, but WITHOUT
* ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS
* FOR A PARTICULAR PURPOSE. See the GNU General Public License for more details.
*
* You should have received a copy of the GNU General Public License along with
* this Program; if not, write to the Free Software Foundation, Inc., 59 Temple
* Place, Suite 330, Boston, MA 02111-1307 USA.
*
* In addition, as a special exception, Red Hat, Inc. gives You the additional
* right to link the code of this Program with code not covered under the GNU
* General Public License ("Non-GPL Code") and to distribute linked combinations
* including the two, subject to the limitations in this paragraph. Non-GPL Code
* permitted under this exception must only link to the code of this Program
* through those well defined interfaces identified in the file named EXCEPTION
* found in the source code files (the "Approved Interfaces"). The files of
* Non-GPL Code may instantiate templates or use macros or inline functions from
* the Approved Interfaces without causing the resulting work to be covered by
* the GNU General Public License. Only Red Hat, Inc. may make changes or
* additions to the list of Approved Interfaces. You must obey the GNU General
* Public License in all respects for all of the Program code and other code used
* in conjunction with the Program except the Non-GPL Code covered by this
* exception. If you modify this file, you may extend this exception to your
* version of the file, but you are not obligated to do so. If you do not wish to
* provide this exception without modification, you must delete this exception
* statement from your version and license this file solely under the GPL without
* exception.
*
*
* Copyright (C) 2001 Sun Microsystems, Inc. Used by permission.
* Copyright (C) 2005 Red Hat, Inc.
* All rights reserved.
* END COPYRIGHT BLOCK **/
#ifdef HAVE_CONFIG_H
# include <config.h>
#endif
/*
* 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 <stdio.h>
#include <sys/types.h>
#ifndef _WIN32
#include <sys/socket.h>
#endif
#include "slap.h"
#include "pratom.h"
void
do_compare( Slapi_PBlock *pb )
{
BerElement *ber = pb->pb_op->o_ber;
char *rawdn = NULL;
char *dn = NULL;
size_t len = 0;
struct ava ava = {0};
Slapi_Backend *be = NULL;
int err;
char ebuf[ BUFSIZ ];
Slapi_DN sdn;
Slapi_Entry *referral = NULL;
char errorbuf[BUFSIZ];
LDAPDebug( LDAP_DEBUG_TRACE, "do_compare\n", 0, 0, 0 );
/* count the compare request */
slapi_counter_increment(g_get_global_snmp_vars()->ops_tbl.dsCompareOps);
/* have to init this here so we can "done" it below if we short circuit */
slapi_sdn_init(&sdn);
/*
* Parse the compare request. It looks like this:
*
* CompareRequest := [APPLICATION 14] SEQUENCE {
* entry DistinguishedName,
* ava SEQUENCE {
* type AttributeType,
* value AttributeValue
* }
* }
*/
if ( ber_scanf( ber, "{a{ao}}", &rawdn, &ava.ava_type,
&ava.ava_value ) == LBER_ERROR ) {
LDAPDebug( LDAP_DEBUG_ANY,
"ber_scanf failed (op=Compare; params=DN,Type,Value)\n",
0, 0, 0 );
send_ldap_result( pb, LDAP_PROTOCOL_ERROR, NULL, NULL, 0,
NULL );
goto free_and_return;
}
/* Check if we should be performing strict validation. */
if (config_get_dn_validate_strict()) {
/* check that the dn is formatted correctly */
err = slapi_dn_syntax_check(pb, rawdn, 1);
if (err) { /* syntax check failed */
op_shared_log_error_access(pb, "CMP",
rawdn?rawdn:"", "strict: invalid dn");
send_ldap_result(pb, LDAP_INVALID_DN_SYNTAX,
NULL, "invalid dn", 0, NULL);
slapi_ch_free((void **) &rawdn);
return;
}
}
err = slapi_dn_normalize_ext(rawdn, 0, &dn, &len);
if (err < 0) {
op_shared_log_error_access(pb, "CMP", rawdn?rawdn:"", "invalid dn");
send_ldap_result(pb, LDAP_INVALID_DN_SYNTAX,
NULL, "invalid dn", 0, NULL);
slapi_ch_free((void **) &rawdn);
return;
} else if (err > 0) { /* if rc == 0, rawdn is passed in */
slapi_ch_free((void **) &rawdn);
} else { /* rc == 0; rawdn is passed in; not null terminated */
*(dn + len) = '\0';
}
/*
* in LDAPv3 there can be optional control extensions on
* the end of an LDAPMessage. we need to read them in and
* pass them to the backend.
*/
if ( (err = get_ldapmessage_controls( pb, ber, NULL )) != 0 ) {
send_ldap_result( pb, err, NULL, NULL, 0, NULL );
goto free_and_return;
}
slapi_sdn_init_dn_passin(&sdn,dn);
dn = NULL; /* do not free - sdn owns it now */
/* target spec is used to decide which plugins are applicable for the operation */
operation_set_target_spec (pb->pb_op, &sdn);
LDAPDebug( LDAP_DEBUG_ARGS, "do_compare: dn (%s) attr (%s)\n",
dn, ava.ava_type, 0 );
slapi_log_access( LDAP_DEBUG_STATS,
"conn=%" NSPRIu64 " op=%d CMP dn=\"%s\" attr=\"%s\"\n",
pb->pb_conn->c_connid, pb->pb_op->o_opid,
escape_string( dn, ebuf ), ava.ava_type );
/*
* We could be serving multiple database backends. Select the
* appropriate one.
*/
if ((err = slapi_mapping_tree_select(pb, &be, &referral, errorbuf)) != LDAP_SUCCESS) {
send_ldap_result(pb, err, NULL, errorbuf, 0, NULL);
be = NULL;
goto free_and_return;
}
if (referral)
{
int managedsait;
slapi_pblock_get(pb, SLAPI_MANAGEDSAIT, &managedsait);
if (managedsait)
{
send_ldap_result(pb, LDAP_UNWILLING_TO_PERFORM, NULL,
"cannot compare referral", 0, NULL);
slapi_entry_free(referral);
goto free_and_return;
}
send_referrals_from_entry(pb,referral);
slapi_entry_free(referral);
goto free_and_return;
}
if ( be->be_compare != NULL ) {
int isroot;
slapi_pblock_set( pb, SLAPI_BACKEND, be );
isroot = pb->pb_op->o_isroot;
slapi_pblock_set( pb, SLAPI_REQUESTOR_ISROOT, &isroot );
slapi_pblock_set( pb, SLAPI_COMPARE_TARGET, (void*)slapi_sdn_get_ndn(&sdn) );
slapi_pblock_set( pb, SLAPI_COMPARE_TYPE, ava.ava_type);
slapi_pblock_set( pb, SLAPI_COMPARE_VALUE, &ava.ava_value );
/*
* call the pre-compare plugins. if they succeed, call
* the backend compare function. then call the
* post-compare plugins.
*/
if ( plugin_call_plugins( pb,
SLAPI_PLUGIN_PRE_COMPARE_FN ) == 0 ) {
int rc;
slapi_pblock_set( pb, SLAPI_PLUGIN, be->be_database );
set_db_default_result_handlers(pb);
rc = (*be->be_compare)( pb );
slapi_pblock_set( pb, SLAPI_PLUGIN_OPRETURN, &rc );
plugin_call_plugins( pb, SLAPI_PLUGIN_POST_COMPARE_FN );
}
} else {
send_ldap_result( pb, LDAP_UNWILLING_TO_PERFORM, NULL,
"Function not implemented", 0, NULL );
}
free_and_return:;
if (be)
slapi_be_Unlock(be);
slapi_sdn_done(&sdn);
slapi_ch_free_string(&dn);
ava_done( &ava );
}
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