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https://git.openldap.org/openldap/openldap.git
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416 lines
8.4 KiB
C
416 lines
8.4 KiB
C
/* null.c - the null backend */
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/* $OpenLDAP$ */
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/* This work is part of OpenLDAP Software <http://www.openldap.org/>.
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*
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* Copyright 2002-2010 The OpenLDAP Foundation.
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* All rights reserved.
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted only as authorized by the OpenLDAP
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* Public License.
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*
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* A copy of this license is available in the file LICENSE in the
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* top-level directory of the distribution or, alternatively, at
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* <http://www.OpenLDAP.org/license.html>.
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*/
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/* ACKNOWLEDGEMENTS:
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* This work was originally developed by Hallvard Furuseth for inclusion
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* in OpenLDAP Software.
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*/
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#include "portable.h"
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#include <stdio.h>
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#include <ac/string.h>
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#include "slap.h"
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#include "config.h"
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struct null_info {
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int ni_bind_allowed;
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ID ni_nextid;
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};
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/* LDAP operations */
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static int
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null_back_bind( Operation *op, SlapReply *rs )
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{
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struct null_info *ni = (struct null_info *) op->o_bd->be_private;
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if ( ni->ni_bind_allowed || be_isroot_pw( op ) ) {
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/* front end will send result on success (0) */
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return LDAP_SUCCESS;
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}
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rs->sr_err = LDAP_INVALID_CREDENTIALS;
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send_ldap_result( op, rs );
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return rs->sr_err;
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}
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static int
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null_back_respond( Operation *op, SlapReply *rs, int rc )
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{
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LDAPControl ctrl[SLAP_MAX_RESPONSE_CONTROLS], *ctrls[SLAP_MAX_RESPONSE_CONTROLS];
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int c = 0;
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BerElementBuffer ps_berbuf;
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BerElement *ps_ber = NULL;
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LDAPControl **preread_ctrl = NULL,
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**postread_ctrl = NULL;
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rs->sr_err = LDAP_OTHER;
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/* this comes first, as in case of assertion failure
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* any further processing must stop */
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if ( get_assert( op ) ) {
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rs->sr_err = LDAP_ASSERTION_FAILED;
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goto respond;
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}
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if ( op->o_preread ) {
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Entry e = { 0 };
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switch ( op->o_tag ) {
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case LDAP_REQ_MODIFY:
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case LDAP_REQ_RENAME:
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case LDAP_REQ_DELETE:
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e.e_name = op->o_req_dn;
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e.e_nname = op->o_req_ndn;
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preread_ctrl = &ctrls[c];
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*preread_ctrl = NULL;
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if ( slap_read_controls( op, rs, &e,
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&slap_pre_read_bv, preread_ctrl ) )
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{
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preread_ctrl = NULL;
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Debug( LDAP_DEBUG_TRACE,
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"<=- null_back_respond: pre-read "
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"failed!\n", 0, 0, 0 );
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if ( op->o_preread & SLAP_CONTROL_CRITICAL ) {
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/* FIXME: is it correct to abort
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* operation if control fails? */
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goto respond;
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}
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} else {
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c++;
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}
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break;
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}
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}
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if ( op->o_postread ) {
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Entry e = { 0 };
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switch ( op->o_tag ) {
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case LDAP_REQ_ADD:
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case LDAP_REQ_MODIFY:
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case LDAP_REQ_RENAME:
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if ( op->o_tag == LDAP_REQ_ADD ) {
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e.e_name = op->ora_e->e_name;
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e.e_nname = op->ora_e->e_nname;
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} else {
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e.e_name = op->o_req_dn;
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e.e_nname = op->o_req_ndn;
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}
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postread_ctrl = &ctrls[c];
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*postread_ctrl = NULL;
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if ( slap_read_controls( op, rs, &e,
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&slap_post_read_bv, postread_ctrl ) )
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{
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postread_ctrl = NULL;
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Debug( LDAP_DEBUG_TRACE,
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"<=- null_back_respond: post-read "
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"failed!\n", 0, 0, 0 );
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if ( op->o_postread & SLAP_CONTROL_CRITICAL ) {
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/* FIXME: is it correct to abort
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* operation if control fails? */
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goto respond;
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}
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} else {
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c++;
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}
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break;
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}
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}
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if ( op->o_noop ) {
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switch ( op->o_tag ) {
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case LDAP_REQ_ADD:
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case LDAP_REQ_MODIFY:
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case LDAP_REQ_RENAME:
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case LDAP_REQ_DELETE:
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case LDAP_REQ_EXTENDED:
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rc = LDAP_X_NO_OPERATION;
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break;
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}
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}
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if ( get_pagedresults( op ) > SLAP_CONTROL_IGNORED ) {
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struct berval cookie = BER_BVC( "" );
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/* should not be here... */
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assert( op->o_tag == LDAP_REQ_SEARCH );
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ctrl[c].ldctl_oid = LDAP_CONTROL_PAGEDRESULTS;
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ctrl[c].ldctl_iscritical = 0;
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ps_ber = (BerElement *)&ps_berbuf;
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ber_init2( ps_ber, NULL, LBER_USE_DER );
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/* return size of 0 -- no estimate */
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ber_printf( ps_ber, "{iO}", 0, &cookie );
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if ( ber_flatten2( ps_ber, &ctrl[c].ldctl_value, 0 ) == -1 ) {
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goto done;
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}
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ctrls[c] = &ctrl[c];
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c++;
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}
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/* terminate controls array */
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ctrls[c] = NULL;
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rs->sr_ctrls = ctrls;
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rs->sr_err = rc;
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respond:;
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send_ldap_result( op, rs );
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rs->sr_ctrls = NULL;
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done:;
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if ( ps_ber != NULL ) {
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(void) ber_free_buf( ps_ber );
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}
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if( preread_ctrl != NULL && (*preread_ctrl) != NULL ) {
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slap_sl_free( (*preread_ctrl)->ldctl_value.bv_val, op->o_tmpmemctx );
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slap_sl_free( *preread_ctrl, op->o_tmpmemctx );
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}
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if( postread_ctrl != NULL && (*postread_ctrl) != NULL ) {
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slap_sl_free( (*postread_ctrl)->ldctl_value.bv_val, op->o_tmpmemctx );
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slap_sl_free( *postread_ctrl, op->o_tmpmemctx );
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}
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return rs->sr_err;
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}
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/* add, delete, modify, modrdn, search */
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static int
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null_back_success( Operation *op, SlapReply *rs )
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{
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return null_back_respond( op, rs, LDAP_SUCCESS );
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}
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/* compare */
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static int
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null_back_false( Operation *op, SlapReply *rs )
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{
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return null_back_respond( op, rs, LDAP_COMPARE_FALSE );
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}
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/* for overlays */
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static int
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null_back_entry_get(
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Operation *op,
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struct berval *ndn,
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ObjectClass *oc,
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AttributeDescription *at,
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int rw,
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Entry **ent )
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{
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/* don't admit the object isn't there */
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return oc || at ? LDAP_NO_SUCH_ATTRIBUTE : LDAP_BUSY;
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}
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/* Slap tools */
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static int
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null_tool_entry_open( BackendDB *be, int mode )
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{
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return 0;
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}
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static int
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null_tool_entry_close( BackendDB *be )
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{
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assert( be != NULL );
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return 0;
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}
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static ID
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null_tool_entry_first_x( BackendDB *be, struct berval *base, int scope, Filter *f )
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{
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return NOID;
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}
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static ID
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null_tool_entry_next( BackendDB *be )
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{
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return NOID;
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}
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static Entry *
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null_tool_entry_get( BackendDB *be, ID id )
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{
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assert( slapMode & SLAP_TOOL_MODE );
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return NULL;
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}
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static ID
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null_tool_entry_put( BackendDB *be, Entry *e, struct berval *text )
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{
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assert( slapMode & SLAP_TOOL_MODE );
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assert( text != NULL );
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assert( text->bv_val != NULL );
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assert( text->bv_val[0] == '\0' ); /* overconservative? */
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e->e_id = ((struct null_info *) be->be_private)->ni_nextid++;
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return e->e_id;
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}
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/* Setup */
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static int
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null_back_db_config(
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BackendDB *be,
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const char *fname,
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int lineno,
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int argc,
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char **argv )
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{
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struct null_info *ni = (struct null_info *) be->be_private;
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if ( ni == NULL ) {
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fprintf( stderr, "%s: line %d: null database info is null!\n",
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fname, lineno );
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return 1;
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}
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/* bind requests allowed */
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if ( strcasecmp( argv[0], "bind" ) == 0 ) {
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if ( argc < 2 ) {
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fprintf( stderr,
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"%s: line %d: missing <on/off> in \"bind <on/off>\" line\n",
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fname, lineno );
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return 1;
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}
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ni->ni_bind_allowed = strcasecmp( argv[1], "off" );
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/* anything else */
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} else {
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return SLAP_CONF_UNKNOWN;
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}
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return 0;
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}
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static int
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null_back_db_init( BackendDB *be, ConfigReply *cr )
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{
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struct null_info *ni = ch_calloc( 1, sizeof(struct null_info) );
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ni->ni_bind_allowed = 0;
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ni->ni_nextid = 1;
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be->be_private = ni;
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return 0;
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}
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static int
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null_back_db_destroy( Backend *be, ConfigReply *cr )
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{
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free( be->be_private );
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return 0;
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}
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int
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null_back_initialize( BackendInfo *bi )
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{
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static char *controls[] = {
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LDAP_CONTROL_ASSERT,
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LDAP_CONTROL_MANAGEDSAIT,
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LDAP_CONTROL_NOOP,
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LDAP_CONTROL_PAGEDRESULTS,
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LDAP_CONTROL_SUBENTRIES,
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LDAP_CONTROL_PRE_READ,
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LDAP_CONTROL_POST_READ,
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LDAP_CONTROL_X_PERMISSIVE_MODIFY,
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NULL
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};
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Debug( LDAP_DEBUG_TRACE,
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"null_back_initialize: initialize null backend\n", 0, 0, 0 );
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bi->bi_flags |=
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SLAP_BFLAG_INCREMENT |
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SLAP_BFLAG_SUBENTRIES |
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SLAP_BFLAG_ALIASES |
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SLAP_BFLAG_REFERRALS;
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bi->bi_controls = controls;
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bi->bi_open = 0;
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bi->bi_close = 0;
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bi->bi_config = 0;
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bi->bi_destroy = 0;
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bi->bi_db_init = null_back_db_init;
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bi->bi_db_config = null_back_db_config;
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bi->bi_db_open = 0;
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bi->bi_db_close = 0;
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bi->bi_db_destroy = null_back_db_destroy;
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bi->bi_op_bind = null_back_bind;
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bi->bi_op_unbind = 0;
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bi->bi_op_search = null_back_success;
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bi->bi_op_compare = null_back_false;
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bi->bi_op_modify = null_back_success;
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bi->bi_op_modrdn = null_back_success;
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bi->bi_op_add = null_back_success;
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bi->bi_op_delete = null_back_success;
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bi->bi_op_abandon = 0;
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bi->bi_extended = 0;
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bi->bi_chk_referrals = 0;
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bi->bi_connection_init = 0;
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bi->bi_connection_destroy = 0;
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bi->bi_entry_get_rw = null_back_entry_get;
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bi->bi_tool_entry_open = null_tool_entry_open;
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bi->bi_tool_entry_close = null_tool_entry_close;
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bi->bi_tool_entry_first = backend_tool_entry_first;
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bi->bi_tool_entry_first_x = null_tool_entry_first_x;
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bi->bi_tool_entry_next = null_tool_entry_next;
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bi->bi_tool_entry_get = null_tool_entry_get;
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bi->bi_tool_entry_put = null_tool_entry_put;
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return 0;
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}
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#if SLAPD_NULL == SLAPD_MOD_DYNAMIC
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/* conditionally define the init_module() function */
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SLAP_BACKEND_INIT_MODULE( null )
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#endif /* SLAPD_NULL == SLAPD_MOD_DYNAMIC */
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