summaryrefslogtreecommitdiffstats
path: root/servers/slapd/back-null/null.c
diff options
context:
space:
mode:
Diffstat (limited to '')
-rw-r--r--servers/slapd/back-null/null.c470
1 files changed, 470 insertions, 0 deletions
diff --git a/servers/slapd/back-null/null.c b/servers/slapd/back-null/null.c
new file mode 100644
index 0000000..6ac7b51
--- /dev/null
+++ b/servers/slapd/back-null/null.c
@@ -0,0 +1,470 @@
+/* null.c - the null backend */
+/* $OpenLDAP$ */
+/* This work is part of OpenLDAP Software <http://www.openldap.org/>.
+ *
+ * Copyright 2002-2021 The OpenLDAP Foundation.
+ * All rights reserved.
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted only as authorized by the OpenLDAP
+ * Public License.
+ *
+ * A copy of this license is available in the file LICENSE in the
+ * top-level directory of the distribution or, alternatively, at
+ * <http://www.OpenLDAP.org/license.html>.
+ */
+/* ACKNOWLEDGEMENTS:
+ * This work was originally developed by Hallvard Furuseth for inclusion
+ * in OpenLDAP Software.
+ */
+
+#include "portable.h"
+
+#include <stdio.h>
+#include <ac/string.h>
+
+#include "slap.h"
+#include "config.h"
+
+typedef struct null_info {
+ int ni_bind_allowed;
+ int ni_dosearch;
+ ID ni_nextid;
+ Entry *ni_entry;
+} null_info;
+
+static ConfigTable nullcfg[] = {
+ { "bind", "true|FALSE", 1, 2, 0, ARG_ON_OFF|ARG_OFFSET,
+ (void *)offsetof(null_info, ni_bind_allowed),
+ "( OLcfgDbAt:8.1 NAME 'olcDbBindAllowed' "
+ "DESC 'Allow binds to this database' "
+ "SYNTAX OMsBoolean SINGLE-VALUE )", NULL, NULL },
+ { "dosearch", "true|FALSE", 1, 2, 0, ARG_ON_OFF|ARG_OFFSET,
+ (void *)offsetof(null_info, ni_dosearch),
+ "( OLcfgDbAt:8.2 NAME 'olcDbDoSearch' "
+ "DESC 'Return an entry on searches' "
+ "SYNTAX OMsBoolean SINGLE-VALUE )", NULL, NULL },
+ { NULL, NULL, 0, 0, 0, ARG_IGNORED,
+ NULL, NULL, NULL, NULL }
+};
+
+static ConfigOCs nullocs[] = {
+ { "( OLcfgDbOc:8.1 "
+ "NAME 'olcNullConfig' "
+ "DESC 'Null backend ocnfiguration' "
+ "SUP olcDatabaseConfig "
+ "MAY ( olcDbBindAllowed $ olcDbDoSearch ) )",
+ Cft_Database, nullcfg },
+ { NULL, 0, NULL }
+};
+
+
+static int
+null_back_db_open( BackendDB *be, ConfigReply *cr )
+{
+ struct null_info *ni = (struct null_info *) be->be_private;
+ struct berval bv[2];
+ AttributeDescription *ad = NULL;
+ const char *text;
+ Entry *e;
+
+ if ( ni->ni_dosearch ) {
+ e = entry_alloc();
+ e->e_name = be->be_suffix[0];
+ e->e_nname = be->be_nsuffix[0];
+
+ dnRdn( &e->e_nname, &bv[0] );
+ bv[1].bv_val = strchr(bv[0].bv_val, '=') + 1;
+ bv[1].bv_len = bv[0].bv_len - (bv[1].bv_val -
+ bv[0].bv_val);
+ bv[0].bv_len -= bv[1].bv_len + 1;
+ slap_bv2ad( &bv[0], &ad, &text );
+ attr_merge_one( e, ad, &bv[1], NULL );
+
+ ber_str2bv("extensibleObject", 0, 0, &bv[0]);
+ attr_merge_one( e, slap_schema.si_ad_objectClass, &bv[0], NULL);
+ ni->ni_entry = e;
+ }
+ return 0;
+}
+
+/* LDAP operations */
+
+static int
+null_back_bind( Operation *op, SlapReply *rs )
+{
+ struct null_info *ni = (struct null_info *) op->o_bd->be_private;
+
+ if ( ni->ni_bind_allowed || be_isroot_pw( op ) ) {
+ /* front end will send result on success (0) */
+ return LDAP_SUCCESS;
+ }
+
+ rs->sr_err = LDAP_INVALID_CREDENTIALS;
+ send_ldap_result( op, rs );
+
+ return rs->sr_err;
+}
+
+
+static int
+null_back_respond( Operation *op, SlapReply *rs, int rc )
+{
+ LDAPControl ctrl[SLAP_MAX_RESPONSE_CONTROLS], *ctrls[SLAP_MAX_RESPONSE_CONTROLS];
+ int c = 0;
+
+ BerElementBuffer ps_berbuf;
+ BerElement *ps_ber = NULL;
+ LDAPControl **preread_ctrl = NULL,
+ **postread_ctrl = NULL;
+
+ rs->sr_err = LDAP_OTHER;
+
+ /* this comes first, as in case of assertion failure
+ * any further processing must stop */
+ if ( get_assert( op ) ) {
+ rs->sr_err = LDAP_ASSERTION_FAILED;
+ goto respond;
+ }
+
+ if ( op->o_preread ) {
+ Entry e = { 0 };
+
+ switch ( op->o_tag ) {
+ case LDAP_REQ_MODIFY:
+ case LDAP_REQ_RENAME:
+ case LDAP_REQ_DELETE:
+ e.e_name = op->o_req_dn;
+ e.e_nname = op->o_req_ndn;
+
+ preread_ctrl = &ctrls[c];
+ *preread_ctrl = NULL;
+
+ if ( slap_read_controls( op, rs, &e,
+ &slap_pre_read_bv, preread_ctrl ) )
+ {
+ preread_ctrl = NULL;
+
+ Debug( LDAP_DEBUG_TRACE,
+ "<=- null_back_respond: pre-read "
+ "failed!\n", 0, 0, 0 );
+
+ if ( op->o_preread & SLAP_CONTROL_CRITICAL ) {
+ /* FIXME: is it correct to abort
+ * operation if control fails? */
+ goto respond;
+ }
+
+ } else {
+ c++;
+ }
+ break;
+ }
+ }
+
+ if ( op->o_postread ) {
+ Entry e = { 0 };
+
+ switch ( op->o_tag ) {
+ case LDAP_REQ_ADD:
+ case LDAP_REQ_MODIFY:
+ case LDAP_REQ_RENAME:
+ if ( op->o_tag == LDAP_REQ_ADD ) {
+ e.e_name = op->ora_e->e_name;
+ e.e_nname = op->ora_e->e_nname;
+
+ } else {
+ e.e_name = op->o_req_dn;
+ e.e_nname = op->o_req_ndn;
+ }
+
+ postread_ctrl = &ctrls[c];
+ *postread_ctrl = NULL;
+
+ if ( slap_read_controls( op, rs, &e,
+ &slap_post_read_bv, postread_ctrl ) )
+ {
+ postread_ctrl = NULL;
+
+ Debug( LDAP_DEBUG_TRACE,
+ "<=- null_back_respond: post-read "
+ "failed!\n", 0, 0, 0 );
+
+ if ( op->o_postread & SLAP_CONTROL_CRITICAL ) {
+ /* FIXME: is it correct to abort
+ * operation if control fails? */
+ goto respond;
+ }
+
+ } else {
+ c++;
+ }
+ break;
+ }
+ }
+
+ if ( op->o_noop ) {
+ switch ( op->o_tag ) {
+ case LDAP_REQ_ADD:
+ case LDAP_REQ_MODIFY:
+ case LDAP_REQ_RENAME:
+ case LDAP_REQ_DELETE:
+ case LDAP_REQ_EXTENDED:
+ rc = LDAP_X_NO_OPERATION;
+ break;
+ }
+ }
+
+ if ( get_pagedresults( op ) > SLAP_CONTROL_IGNORED ) {
+ struct berval cookie = BER_BVC( "" );
+
+ /* should not be here... */
+ assert( op->o_tag == LDAP_REQ_SEARCH );
+
+ ctrl[c].ldctl_oid = LDAP_CONTROL_PAGEDRESULTS;
+ ctrl[c].ldctl_iscritical = 0;
+
+ ps_ber = (BerElement *)&ps_berbuf;
+ ber_init2( ps_ber, NULL, LBER_USE_DER );
+
+ /* return size of 0 -- no estimate */
+ ber_printf( ps_ber, "{iO}", 0, &cookie );
+
+ if ( ber_flatten2( ps_ber, &ctrl[c].ldctl_value, 0 ) == -1 ) {
+ goto done;
+ }
+
+ ctrls[c] = &ctrl[c];
+ c++;
+ }
+
+ /* terminate controls array */
+ ctrls[c] = NULL;
+ rs->sr_ctrls = ctrls;
+ rs->sr_err = rc;
+
+respond:;
+ send_ldap_result( op, rs );
+ rs->sr_ctrls = NULL;
+
+done:;
+ if ( ps_ber != NULL ) {
+ (void) ber_free_buf( ps_ber );
+ }
+
+ if( preread_ctrl != NULL && (*preread_ctrl) != NULL ) {
+ slap_sl_free( (*preread_ctrl)->ldctl_value.bv_val, op->o_tmpmemctx );
+ slap_sl_free( *preread_ctrl, op->o_tmpmemctx );
+ }
+
+ if( postread_ctrl != NULL && (*postread_ctrl) != NULL ) {
+ slap_sl_free( (*postread_ctrl)->ldctl_value.bv_val, op->o_tmpmemctx );
+ slap_sl_free( *postread_ctrl, op->o_tmpmemctx );
+ }
+
+ return rs->sr_err;
+}
+
+/* add, delete, modify, modrdn, search */
+static int
+null_back_success( Operation *op, SlapReply *rs )
+{
+ return null_back_respond( op, rs, LDAP_SUCCESS );
+}
+
+/* compare */
+static int
+null_back_false( Operation *op, SlapReply *rs )
+{
+ return null_back_respond( op, rs, LDAP_COMPARE_FALSE );
+}
+
+static int
+null_back_search( Operation *op, SlapReply *rs )
+{
+ struct null_info *ni = (struct null_info *) op->o_bd->be_private;
+
+ if ( ni->ni_entry ) {
+ rs->sr_entry = ni->ni_entry;
+ rs->sr_flags = 0;
+
+ rs->sr_attrs = op->ors_attrs;
+ rs->sr_operational_attrs = NULL;
+ send_search_entry( op, rs );
+ }
+ return null_back_respond( op, rs, LDAP_SUCCESS );
+}
+
+/* for overlays */
+static int
+null_back_entry_get(
+ Operation *op,
+ struct berval *ndn,
+ ObjectClass *oc,
+ AttributeDescription *at,
+ int rw,
+ Entry **ent )
+{
+ /* don't admit the object isn't there */
+ return oc || at ? LDAP_NO_SUCH_ATTRIBUTE : LDAP_BUSY;
+}
+
+static int
+null_back_entry_release(
+ Operation *op,
+ Entry *e,
+ int rw )
+{
+ /* we reuse our entry, don't free it */
+ return 0;
+}
+
+/* Slap tools */
+
+static int
+null_tool_entry_open( BackendDB *be, int mode )
+{
+ return 0;
+}
+
+static int
+null_tool_entry_close( BackendDB *be )
+{
+ assert( be != NULL );
+ return 0;
+}
+
+static ID
+null_tool_entry_first_x( BackendDB *be, struct berval *base, int scope, Filter *f )
+{
+ return NOID;
+}
+
+static ID
+null_tool_entry_next( BackendDB *be )
+{
+ return NOID;
+}
+
+static Entry *
+null_tool_entry_get( BackendDB *be, ID id )
+{
+ assert( slapMode & SLAP_TOOL_MODE );
+ return NULL;
+}
+
+static ID
+null_tool_entry_put( BackendDB *be, Entry *e, struct berval *text )
+{
+ assert( slapMode & SLAP_TOOL_MODE );
+ assert( text != NULL );
+ assert( text->bv_val != NULL );
+ assert( text->bv_val[0] == '\0' ); /* overconservative? */
+
+ e->e_id = ((struct null_info *) be->be_private)->ni_nextid++;
+ return e->e_id;
+}
+
+
+/* Setup */
+
+static int
+null_back_db_init( BackendDB *be, ConfigReply *cr )
+{
+ struct null_info *ni = ch_calloc( 1, sizeof(struct null_info) );
+ ni->ni_bind_allowed = 0;
+ ni->ni_nextid = 1;
+ be->be_private = ni;
+ be->be_cf_ocs = be->bd_info->bi_cf_ocs;
+ return 0;
+}
+
+static int
+null_back_db_destroy( Backend *be, ConfigReply *cr )
+{
+ struct null_info *ni = be->be_private;
+
+ if ( ni->ni_entry ) {
+ entry_free( ni->ni_entry );
+ ni->ni_entry = NULL;
+ }
+ free( be->be_private );
+ return 0;
+}
+
+
+int
+null_back_initialize( BackendInfo *bi )
+{
+ static char *controls[] = {
+ LDAP_CONTROL_ASSERT,
+ LDAP_CONTROL_MANAGEDSAIT,
+ LDAP_CONTROL_NOOP,
+ LDAP_CONTROL_PAGEDRESULTS,
+ LDAP_CONTROL_SUBENTRIES,
+ LDAP_CONTROL_PRE_READ,
+ LDAP_CONTROL_POST_READ,
+ LDAP_CONTROL_X_PERMISSIVE_MODIFY,
+ NULL
+ };
+
+ Debug( LDAP_DEBUG_TRACE,
+ "null_back_initialize: initialize null backend\n", 0, 0, 0 );
+
+ bi->bi_flags |=
+ SLAP_BFLAG_INCREMENT |
+ SLAP_BFLAG_SUBENTRIES |
+ SLAP_BFLAG_ALIASES |
+ SLAP_BFLAG_REFERRALS;
+
+ bi->bi_controls = controls;
+
+ bi->bi_open = 0;
+ bi->bi_close = 0;
+ bi->bi_config = 0;
+ bi->bi_destroy = 0;
+
+ bi->bi_db_init = null_back_db_init;
+ bi->bi_db_config = config_generic_wrapper;
+ bi->bi_db_open = null_back_db_open;
+ bi->bi_db_close = 0;
+ bi->bi_db_destroy = null_back_db_destroy;
+
+ bi->bi_op_bind = null_back_bind;
+ bi->bi_op_unbind = 0;
+ bi->bi_op_search = null_back_search;
+ bi->bi_op_compare = null_back_false;
+ bi->bi_op_modify = null_back_success;
+ bi->bi_op_modrdn = null_back_success;
+ bi->bi_op_add = null_back_success;
+ bi->bi_op_delete = null_back_success;
+ bi->bi_op_abandon = 0;
+
+ bi->bi_extended = 0;
+
+ bi->bi_chk_referrals = 0;
+
+ bi->bi_connection_init = 0;
+ bi->bi_connection_destroy = 0;
+
+ bi->bi_entry_get_rw = null_back_entry_get;
+ bi->bi_entry_release_rw = null_back_entry_release;
+
+ bi->bi_tool_entry_open = null_tool_entry_open;
+ bi->bi_tool_entry_close = null_tool_entry_close;
+ bi->bi_tool_entry_first = backend_tool_entry_first;
+ bi->bi_tool_entry_first_x = null_tool_entry_first_x;
+ bi->bi_tool_entry_next = null_tool_entry_next;
+ bi->bi_tool_entry_get = null_tool_entry_get;
+ bi->bi_tool_entry_put = null_tool_entry_put;
+
+ bi->bi_cf_ocs = nullocs;
+ return config_register_schema( nullcfg, nullocs );
+}
+
+#if SLAPD_NULL == SLAPD_MOD_DYNAMIC
+
+/* conditionally define the init_module() function */
+SLAP_BACKEND_INIT_MODULE( null )
+
+#endif /* SLAPD_NULL == SLAPD_MOD_DYNAMIC */