Adding upstream version 2.4.57+dfsg.upstream/2.4.57+dfsgupstream

Signed-off-by: Daniel Baumann <daniel.baumann@progress-linux.org>

1 files changed, 2154 insertions, 0 deletions

diff --git a/servers/slapd/controls.c b/servers/slapd/controls.c
new file mode 100644
index 0000000..5d4eb1e
--- /dev/null
+++ b/servers/slapd/controls.c
@@ -0,0 +1,2154 @@
+/* $OpenLDAP$ */
+/* This work is part of OpenLDAP Software <http://www.openldap.org/>.
+ *
+ * Copyright 1998-2021 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>.
+ */
+
+#include "portable.h"
+
+#include <stdio.h>
+
+#include <ac/string.h>
+#include <ac/socket.h>
+
+#include "slap.h"
+#include "ldif.h"
+#include "lutil.h"
+
+#include "../../libraries/liblber/lber-int.h"
+
+static SLAP_CTRL_PARSE_FN parseAssert;
+static SLAP_CTRL_PARSE_FN parseDomainScope;
+static SLAP_CTRL_PARSE_FN parseDontUseCopy;
+static SLAP_CTRL_PARSE_FN parseManageDSAit;
+static SLAP_CTRL_PARSE_FN parseNoOp;
+static SLAP_CTRL_PARSE_FN parsePagedResults;
+static SLAP_CTRL_PARSE_FN parsePermissiveModify;
+static SLAP_CTRL_PARSE_FN parsePreRead, parsePostRead;
+static SLAP_CTRL_PARSE_FN parseProxyAuthz;
+static SLAP_CTRL_PARSE_FN parseRelax;
+static SLAP_CTRL_PARSE_FN parseSearchOptions;
+#ifdef SLAP_CONTROL_X_SORTEDRESULTS
+static SLAP_CTRL_PARSE_FN parseSortedResults;
+#endif
+static SLAP_CTRL_PARSE_FN parseSubentries;
+#ifdef SLAP_CONTROL_X_TREE_DELETE
+static SLAP_CTRL_PARSE_FN parseTreeDelete;
+#endif
+static SLAP_CTRL_PARSE_FN parseValuesReturnFilter;
+#ifdef SLAP_CONTROL_X_SESSION_TRACKING
+static SLAP_CTRL_PARSE_FN parseSessionTracking;
+#endif
+#ifdef SLAP_CONTROL_X_WHATFAILED
+static SLAP_CTRL_PARSE_FN parseWhatFailed;
+#endif
+
+#undef sc_mask /* avoid conflict with Irix 6.5 <sys/signal.h> */
+
+const struct berval slap_pre_read_bv = BER_BVC(LDAP_CONTROL_PRE_READ);
+const struct berval slap_post_read_bv = BER_BVC(LDAP_CONTROL_POST_READ);
+
+struct slap_control_ids slap_cids;
+
+struct slap_control {
+	/* Control OID */
+	char *sc_oid;
+
+	/* The controlID for this control */
+	int sc_cid;
+
+	/* Operations supported by control */
+	slap_mask_t sc_mask;
+
+	/* Extended operations supported by control */
+	char **sc_extendedops;		/* input */
+	BerVarray sc_extendedopsbv;	/* run-time use */
+
+	/* Control parsing callback */
+	SLAP_CTRL_PARSE_FN *sc_parse;
+
+	LDAP_SLIST_ENTRY(slap_control) sc_next;
+};
+
+static LDAP_SLIST_HEAD(ControlsList, slap_control) controls_list
+	= LDAP_SLIST_HEAD_INITIALIZER(&controls_list);
+
+/*
+ * all known request control OIDs should be added to this list
+ */
+/*
+ * NOTE: initialize num_known_controls to 1 so that cid = 0 always
+ * addresses an undefined control; this allows to safely test for 
+ * well known controls even if they are not registered, e.g. if 
+ * they get moved to modules.  An example is sc_LDAPsync, which 
+ * is implemented in the syncprov overlay and thus, if configured 
+ * as dynamic module, may not be registered.  One side effect is that 
+ * slap_known_controls[0] == NULL, so it should always be used 
+ * starting from 1.
+ * FIXME: should we define the "undefined control" oid?
+ */
+char *slap_known_controls[SLAP_MAX_CIDS+1];
+static int num_known_controls = 1;
+
+static char *proxy_authz_extops[] = {
+	LDAP_EXOP_MODIFY_PASSWD,
+	LDAP_EXOP_WHO_AM_I,
+	LDAP_EXOP_REFRESH,
+	NULL
+};
+
+static char *manageDSAit_extops[] = {
+	LDAP_EXOP_REFRESH,
+	NULL
+};
+
+#ifdef SLAP_CONTROL_X_SESSION_TRACKING
+static char *session_tracking_extops[] = {
+	LDAP_EXOP_MODIFY_PASSWD,
+	LDAP_EXOP_WHO_AM_I,
+	LDAP_EXOP_REFRESH,
+	NULL
+};
+#endif
+
+static struct slap_control control_defs[] = {
+	{  LDAP_CONTROL_ASSERT,
+ 		(int)offsetof(struct slap_control_ids, sc_assert),
+		SLAP_CTRL_UPDATE|SLAP_CTRL_COMPARE|SLAP_CTRL_SEARCH,
+		NULL, NULL,
+		parseAssert, LDAP_SLIST_ENTRY_INITIALIZER(next) },
+	{ LDAP_CONTROL_PRE_READ,
+ 		(int)offsetof(struct slap_control_ids, sc_preRead),
+		SLAP_CTRL_DELETE|SLAP_CTRL_MODIFY|SLAP_CTRL_RENAME,
+		NULL, NULL,
+		parsePreRead, LDAP_SLIST_ENTRY_INITIALIZER(next) },
+	{ LDAP_CONTROL_POST_READ,
+ 		(int)offsetof(struct slap_control_ids, sc_postRead),
+		SLAP_CTRL_ADD|SLAP_CTRL_MODIFY|SLAP_CTRL_RENAME,
+		NULL, NULL,
+		parsePostRead, LDAP_SLIST_ENTRY_INITIALIZER(next) },
+ 	{ LDAP_CONTROL_VALUESRETURNFILTER,
+ 		(int)offsetof(struct slap_control_ids, sc_valuesReturnFilter),
+ 		SLAP_CTRL_GLOBAL|SLAP_CTRL_SEARCH,
+		NULL, NULL,
+		parseValuesReturnFilter, LDAP_SLIST_ENTRY_INITIALIZER(next) },
+	{ LDAP_CONTROL_PAGEDRESULTS,
+ 		(int)offsetof(struct slap_control_ids, sc_pagedResults),
+		SLAP_CTRL_SEARCH,
+		NULL, NULL,
+		parsePagedResults, LDAP_SLIST_ENTRY_INITIALIZER(next) },
+#ifdef SLAP_CONTROL_X_SORTEDRESULTS
+	{ LDAP_CONTROL_SORTREQUEST,
+ 		(int)offsetof(struct slap_control_ids, sc_sortedResults),
+		SLAP_CTRL_GLOBAL|SLAP_CTRL_SEARCH|SLAP_CTRL_HIDE,
+		NULL, NULL,
+		parseSortedResults, LDAP_SLIST_ENTRY_INITIALIZER(next) },
+#endif
+	{ LDAP_CONTROL_X_DOMAIN_SCOPE,
+ 		(int)offsetof(struct slap_control_ids, sc_domainScope),
+		SLAP_CTRL_GLOBAL|SLAP_CTRL_SEARCH|SLAP_CTRL_HIDE,
+		NULL, NULL,
+		parseDomainScope, LDAP_SLIST_ENTRY_INITIALIZER(next) },
+	{ LDAP_CONTROL_DONTUSECOPY,
+ 		(int)offsetof(struct slap_control_ids, sc_dontUseCopy),
+		SLAP_CTRL_GLOBAL|SLAP_CTRL_INTROGATE,
+		NULL, NULL,
+		parseDontUseCopy, LDAP_SLIST_ENTRY_INITIALIZER(next) },
+	{ LDAP_CONTROL_X_PERMISSIVE_MODIFY,
+ 		(int)offsetof(struct slap_control_ids, sc_permissiveModify),
+		SLAP_CTRL_MODIFY|SLAP_CTRL_HIDE,
+		NULL, NULL,
+		parsePermissiveModify, LDAP_SLIST_ENTRY_INITIALIZER(next) },
+#ifdef SLAP_CONTROL_X_TREE_DELETE
+	{ LDAP_CONTROL_X_TREE_DELETE,
+ 		(int)offsetof(struct slap_control_ids, sc_treeDelete),
+		SLAP_CTRL_DELETE|SLAP_CTRL_HIDE,
+		NULL, NULL,
+		parseTreeDelete, LDAP_SLIST_ENTRY_INITIALIZER(next) },
+#endif
+	{ LDAP_CONTROL_X_SEARCH_OPTIONS,
+ 		(int)offsetof(struct slap_control_ids, sc_searchOptions),
+		SLAP_CTRL_GLOBAL|SLAP_CTRL_SEARCH|SLAP_CTRL_HIDE,
+		NULL, NULL,
+		parseSearchOptions, LDAP_SLIST_ENTRY_INITIALIZER(next) },
+	{ LDAP_CONTROL_SUBENTRIES,
+ 		(int)offsetof(struct slap_control_ids, sc_subentries),
+		SLAP_CTRL_SEARCH,
+		NULL, NULL,
+		parseSubentries, LDAP_SLIST_ENTRY_INITIALIZER(next) },
+	{ LDAP_CONTROL_NOOP,
+ 		(int)offsetof(struct slap_control_ids, sc_noOp),
+		SLAP_CTRL_ACCESS|SLAP_CTRL_HIDE,
+		NULL, NULL,
+		parseNoOp, LDAP_SLIST_ENTRY_INITIALIZER(next) },
+	{ LDAP_CONTROL_RELAX,
+ 		(int)offsetof(struct slap_control_ids, sc_relax),
+		SLAP_CTRL_GLOBAL|SLAP_CTRL_UPDATE|SLAP_CTRL_HIDE,
+		NULL, NULL,
+		parseRelax, LDAP_SLIST_ENTRY_INITIALIZER(next) },
+#ifdef LDAP_X_TXN
+	{ LDAP_CONTROL_X_TXN_SPEC,
+ 		(int)offsetof(struct slap_control_ids, sc_txnSpec),
+		SLAP_CTRL_UPDATE|SLAP_CTRL_HIDE,
+		NULL, NULL,
+		txn_spec_ctrl, LDAP_SLIST_ENTRY_INITIALIZER(next) },
+#endif
+	{ LDAP_CONTROL_MANAGEDSAIT,
+ 		(int)offsetof(struct slap_control_ids, sc_manageDSAit),
+		SLAP_CTRL_ACCESS,
+		manageDSAit_extops, NULL,
+		parseManageDSAit, LDAP_SLIST_ENTRY_INITIALIZER(next) },
+	{ LDAP_CONTROL_PROXY_AUTHZ,
+ 		(int)offsetof(struct slap_control_ids, sc_proxyAuthz),
+		SLAP_CTRL_GLOBAL|SLAP_CTRL_ACCESS,
+		proxy_authz_extops, NULL,
+		parseProxyAuthz, LDAP_SLIST_ENTRY_INITIALIZER(next) },
+#ifdef SLAP_CONTROL_X_SESSION_TRACKING
+	{ LDAP_CONTROL_X_SESSION_TRACKING,
+ 		(int)offsetof(struct slap_control_ids, sc_sessionTracking),
+		SLAP_CTRL_GLOBAL|SLAP_CTRL_ACCESS|SLAP_CTRL_BIND|SLAP_CTRL_HIDE,
+		session_tracking_extops, NULL,
+		parseSessionTracking, LDAP_SLIST_ENTRY_INITIALIZER(next) },
+#endif
+#ifdef SLAP_CONTROL_X_WHATFAILED
+	{ LDAP_CONTROL_X_WHATFAILED,
+ 		(int)offsetof(struct slap_control_ids, sc_whatFailed),
+		SLAP_CTRL_GLOBAL|SLAP_CTRL_ACCESS|SLAP_CTRL_HIDE,
+		NULL, NULL,
+		parseWhatFailed, LDAP_SLIST_ENTRY_INITIALIZER(next) },
+#endif
+
+	{ NULL, 0, 0, NULL, 0, NULL, LDAP_SLIST_ENTRY_INITIALIZER(next) }
+};
+
+static struct slap_control *
+find_ctrl( const char *oid );
+
+/*
+ * Register a supported control.
+ *
+ * This can be called by an OpenLDAP plugin or, indirectly, by a
+ * SLAPI plugin calling slapi_register_supported_control().
+ *
+ * NOTE: if flags == 1 the control is replaced if already registered;
+ * otherwise registering an already registered control is not allowed.
+ */
+int
+register_supported_control2(const char *controloid,
+	slap_mask_t controlmask,
+	char **controlexops,
+	SLAP_CTRL_PARSE_FN *controlparsefn,
+	unsigned flags,
+	int *controlcid)
+{
+	struct slap_control *sc = NULL;
+	int i;
+	BerVarray extendedopsbv = NULL;
+
+	if ( num_known_controls >= SLAP_MAX_CIDS ) {
+		Debug( LDAP_DEBUG_ANY, "Too many controls registered."
+			" Recompile slapd with SLAP_MAX_CIDS defined > %d\n",
+		num_known_controls, 0, 0 );
+		return LDAP_OTHER;
+	}
+
+	if ( controloid == NULL ) {
+		return LDAP_PARAM_ERROR;
+	}
+
+	/* check if already registered */
+	for ( i = 0; slap_known_controls[ i ]; i++ ) {
+		if ( strcmp( controloid, slap_known_controls[ i ] ) == 0 ) {
+			if ( flags == 1 ) {
+				Debug( LDAP_DEBUG_TRACE,
+					"Control %s already registered; replacing.\n",
+					controloid, 0, 0 );
+				/* (find and) replace existing handler */
+				sc = find_ctrl( controloid );
+				assert( sc != NULL );
+				break;
+			}
+
+			Debug( LDAP_DEBUG_ANY,
+				"Control %s already registered.\n",
+				controloid, 0, 0 );
+			return LDAP_PARAM_ERROR;
+		}
+	}
+
+	/* turn compatible extended operations into bervals */
+	if ( controlexops != NULL ) {
+		int i;
+
+		for ( i = 0; controlexops[ i ]; i++ );
+
+		extendedopsbv = ber_memcalloc( i + 1, sizeof( struct berval ) );
+		if ( extendedopsbv == NULL ) {
+			return LDAP_NO_MEMORY;
+		}
+
+		for ( i = 0; controlexops[ i ]; i++ ) {
+			ber_str2bv( controlexops[ i ], 0, 1, &extendedopsbv[ i ] );
+		}
+	}
+
+	if ( sc == NULL ) {
+		sc = (struct slap_control *)SLAP_MALLOC( sizeof( *sc ) );
+		if ( sc == NULL ) {
+			ber_bvarray_free( extendedopsbv );
+			return LDAP_NO_MEMORY;
+		}
+
+		sc->sc_oid = ch_strdup( controloid );
+		sc->sc_cid = num_known_controls;
+
+		/* Update slap_known_controls, too. */
+		slap_known_controls[num_known_controls - 1] = sc->sc_oid;
+		slap_known_controls[num_known_controls++] = NULL;
+
+		LDAP_SLIST_NEXT( sc, sc_next ) = NULL;
+		LDAP_SLIST_INSERT_HEAD( &controls_list, sc, sc_next );
+
+	} else {
+		if ( sc->sc_extendedopsbv ) {
+			/* FIXME: in principle, we should rather merge
+			 * existing extops with those supported by the
+			 * new control handling implementation.
+			 * In fact, whether a control is compatible with
+			 * an extop should not be a matter of implementation.
+			 * We likely also need a means for a newly
+			 * registered extop to declare that it is
+			 * comptible with an already registered control.
+			 */
+			ber_bvarray_free( sc->sc_extendedopsbv );
+			sc->sc_extendedopsbv = NULL;
+			sc->sc_extendedops = NULL;
+		}
+	}
+
+	sc->sc_extendedopsbv = extendedopsbv;
+	sc->sc_mask = controlmask;
+	sc->sc_parse = controlparsefn;
+	if ( controlcid ) {
+		*controlcid = sc->sc_cid;
+	}
+
+	return LDAP_SUCCESS;
+}
+
+#ifdef SLAP_CONFIG_DELETE
+int
+unregister_supported_control( const char *controloid )
+{
+	struct slap_control *sc;
+	int i;
+
+	if ( controloid == NULL || (sc = find_ctrl( controloid )) == NULL ){
+		return -1;
+	}
+
+	for ( i = 0; slap_known_controls[ i ]; i++ ) {
+		if ( strcmp( controloid, slap_known_controls[ i ] ) == 0 ) {
+			do {
+				slap_known_controls[ i ] = slap_known_controls[ i+1 ];
+			} while ( slap_known_controls[ i++ ] );
+			num_known_controls--;
+			break;
+		}
+	}
+
+	LDAP_SLIST_REMOVE(&controls_list, sc, slap_control, sc_next);
+	ch_free( sc->sc_oid );
+	if ( sc->sc_extendedopsbv != NULL ) {
+		ber_bvarray_free( sc->sc_extendedopsbv );
+	}
+	ch_free( sc );
+
+	return 0;
+}
+#endif /* SLAP_CONFIG_DELETE */
+
+/*
+ * One-time initialization of internal controls.
+ */
+int
+slap_controls_init( void )
+{
+	int i, rc;
+
+	rc = LDAP_SUCCESS;
+
+	for ( i = 0; control_defs[i].sc_oid != NULL; i++ ) {
+		int *cid = (int *)(((char *)&slap_cids) + control_defs[i].sc_cid );
+		rc = register_supported_control( control_defs[i].sc_oid,
+			control_defs[i].sc_mask, control_defs[i].sc_extendedops,
+			control_defs[i].sc_parse, cid );
+		if ( rc != LDAP_SUCCESS ) break;
+	}
+
+	return rc;
+}
+
+/*
+ * Free memory associated with list of supported controls.
+ */
+void
+controls_destroy( void )
+{
+	struct slap_control *sc;
+
+	while ( !LDAP_SLIST_EMPTY(&controls_list) ) {
+		sc = LDAP_SLIST_FIRST(&controls_list);
+		LDAP_SLIST_REMOVE_HEAD(&controls_list, sc_next);
+
+		ch_free( sc->sc_oid );
+		if ( sc->sc_extendedopsbv != NULL ) {
+			ber_bvarray_free( sc->sc_extendedopsbv );
+		}
+		ch_free( sc );
+	}
+}
+
+/*
+ * Format the supportedControl attribute of the root DSE,
+ * detailing which controls are supported by the directory
+ * server.
+ */
+int
+controls_root_dse_info( Entry *e )
+{
+	AttributeDescription *ad_supportedControl
+		= slap_schema.si_ad_supportedControl;
+	struct berval vals[2];
+	struct slap_control *sc;
+
+	vals[1].bv_val = NULL;
+	vals[1].bv_len = 0;
+
+	LDAP_SLIST_FOREACH( sc, &controls_list, sc_next ) {
+		if( sc->sc_mask & SLAP_CTRL_HIDE ) continue;
+
+		vals[0].bv_val = sc->sc_oid;
+		vals[0].bv_len = strlen( sc->sc_oid );
+
+		if ( attr_merge( e, ad_supportedControl, vals, NULL ) ) {
+			return -1;
+		}
+	}
+
+	return 0;
+}
+
+/*
+ * Return a list of OIDs and operation masks for supported
+ * controls. Used by SLAPI.
+ */
+int
+get_supported_controls(char ***ctrloidsp,
+	slap_mask_t **ctrlmasks)
+{
+	int n;
+	char **oids;
+	slap_mask_t *masks;
+	struct slap_control *sc;
+
+	n = 0;
+
+	LDAP_SLIST_FOREACH( sc, &controls_list, sc_next ) {
+		n++;
+	}
+
+	if ( n == 0 ) {
+		*ctrloidsp = NULL;
+		*ctrlmasks = NULL;
+		return LDAP_SUCCESS;
+	}
+
+	oids = (char **)SLAP_MALLOC( (n + 1) * sizeof(char *) );
+	if ( oids == NULL ) {
+		return LDAP_NO_MEMORY;
+	}
+	masks = (slap_mask_t *)SLAP_MALLOC( (n + 1) * sizeof(slap_mask_t) );
+	if  ( masks == NULL ) {
+		SLAP_FREE( oids );
+		return LDAP_NO_MEMORY;
+	}
+
+	n = 0;
+
+	LDAP_SLIST_FOREACH( sc, &controls_list, sc_next ) {
+		oids[n] = ch_strdup( sc->sc_oid );
+		masks[n] = sc->sc_mask;
+		n++;
+	}
+	oids[n] = NULL;
+	masks[n] = 0;
+
+	*ctrloidsp = oids;
+	*ctrlmasks = masks;
+
+	return LDAP_SUCCESS;
+}
+
+/*
+ * Find a control given its OID.
+ */
+static struct slap_control *
+find_ctrl( const char *oid )
+{
+	struct slap_control *sc;
+
+	LDAP_SLIST_FOREACH( sc, &controls_list, sc_next ) {
+		if ( strcmp( oid, sc->sc_oid ) == 0 ) {
+			return sc;
+		}
+	}
+
+	return NULL;
+}
+
+int
+slap_find_control_id(
+	const char *oid,
+	int *cid )
+{
+	struct slap_control *ctrl = find_ctrl( oid );
+	if ( ctrl ) {
+		if ( cid ) *cid = ctrl->sc_cid;
+		return LDAP_SUCCESS;
+	}
+	return LDAP_CONTROL_NOT_FOUND;
+}
+
+int
+slap_global_control( Operation *op, const char *oid, int *cid )
+{
+	struct slap_control *ctrl = find_ctrl( oid );
+
+	if ( ctrl == NULL ) {
+		/* should not be reachable */
+		Debug( LDAP_DEBUG_ANY,
+			"slap_global_control: unrecognized control: %s\n",      
+			oid, 0, 0 );
+		return LDAP_CONTROL_NOT_FOUND;
+	}
+
+	if ( cid ) *cid = ctrl->sc_cid;
+
+	if ( ( ctrl->sc_mask & SLAP_CTRL_GLOBAL ) ||
+		( ( op->o_tag & LDAP_REQ_SEARCH ) &&
+		( ctrl->sc_mask & SLAP_CTRL_GLOBAL_SEARCH ) ) )
+	{
+		return LDAP_COMPARE_TRUE;
+	}
+
+#if 0
+	Debug( LDAP_DEBUG_TRACE,
+		"slap_global_control: unavailable control: %s\n",      
+		oid, 0, 0 );
+#endif
+
+	return LDAP_COMPARE_FALSE;
+}
+
+void slap_free_ctrls(
+	Operation *op,
+	LDAPControl **ctrls )
+{
+	int i;
+
+	if( ctrls == op->o_ctrls ) {
+		if( op->o_assertion != NULL ) {
+			filter_free_x( op, op->o_assertion, 1 );
+			op->o_assertion = NULL;
+		}
+		if( op->o_vrFilter != NULL) {
+			vrFilter_free( op, op->o_vrFilter );
+			op->o_vrFilter = NULL;
+		}
+		if( op->o_preread_attrs != NULL ) {
+			op->o_tmpfree( op->o_preread_attrs, op->o_tmpmemctx );
+			op->o_preread_attrs = NULL;
+		}
+		if( op->o_postread_attrs != NULL ) {
+			op->o_tmpfree( op->o_postread_attrs, op->o_tmpmemctx );
+			op->o_postread_attrs = NULL;
+		}
+		if( op->o_pagedresults_state != NULL ) {
+			op->o_tmpfree( op->o_pagedresults_state, op->o_tmpmemctx );
+			op->o_pagedresults_state = NULL;
+		}
+	}
+
+	for (i=0; ctrls[i]; i++) {
+		op->o_tmpfree(ctrls[i], op->o_tmpmemctx );
+	}
+	op->o_tmpfree( ctrls, op->o_tmpmemctx );
+}
+
+int slap_add_ctrls(
+	Operation *op,
+	SlapReply *rs,
+	LDAPControl **ctrls )
+{
+	int i = 0, j;
+	LDAPControl **ctrlsp;
+
+	if ( rs->sr_ctrls ) {
+		for ( ; rs->sr_ctrls[ i ]; i++ ) ;
+	}
+
+	for ( j=0; ctrls[j]; j++ ) ;
+
+	ctrlsp = op->o_tmpalloc(( i+j+1 )*sizeof(LDAPControl *), op->o_tmpmemctx );
+	i = 0;
+	if ( rs->sr_ctrls ) {
+		for ( ; rs->sr_ctrls[i]; i++ )
+			ctrlsp[i] = rs->sr_ctrls[i];
+	}
+	for ( j=0; ctrls[j]; j++)
+		ctrlsp[i++] = ctrls[j];
+	ctrlsp[i] = NULL;
+
+	if ( rs->sr_flags & REP_CTRLS_MUSTBEFREED )
+		op->o_tmpfree( rs->sr_ctrls, op->o_tmpmemctx );
+	rs->sr_ctrls = ctrlsp;
+	rs->sr_flags |= REP_CTRLS_MUSTBEFREED;
+	return i;
+}
+
+int slap_parse_ctrl(
+	Operation *op,
+	SlapReply *rs,
+	LDAPControl *control,
+	const char **text )
+{
+	struct slap_control *sc;
+	int rc = LDAP_SUCCESS;
+
+	sc = find_ctrl( control->ldctl_oid );
+	if( sc != NULL ) {
+		/* recognized control */
+		slap_mask_t tagmask;
+		switch( op->o_tag ) {
+		case LDAP_REQ_ADD:
+			tagmask = SLAP_CTRL_ADD;
+			break;
+		case LDAP_REQ_BIND:
+			tagmask = SLAP_CTRL_BIND;
+			break;
+		case LDAP_REQ_COMPARE:
+			tagmask = SLAP_CTRL_COMPARE;
+			break;
+		case LDAP_REQ_DELETE:
+			tagmask = SLAP_CTRL_DELETE;
+			break;
+		case LDAP_REQ_MODIFY:
+			tagmask = SLAP_CTRL_MODIFY;
+			break;
+		case LDAP_REQ_RENAME:
+			tagmask = SLAP_CTRL_RENAME;
+			break;
+		case LDAP_REQ_SEARCH:
+			tagmask = SLAP_CTRL_SEARCH;
+			break;
+		case LDAP_REQ_UNBIND:
+			tagmask = SLAP_CTRL_UNBIND;
+			break;
+		case LDAP_REQ_ABANDON:
+			tagmask = SLAP_CTRL_ABANDON;
+			break;
+		case LDAP_REQ_EXTENDED:
+			tagmask=~0L;
+			assert( op->ore_reqoid.bv_val != NULL );
+			if( sc->sc_extendedopsbv != NULL ) {
+				int i;
+				for( i=0; !BER_BVISNULL( &sc->sc_extendedopsbv[i] ); i++ ) {
+					if( bvmatch( &op->ore_reqoid,
+						&sc->sc_extendedopsbv[i] ) )
+					{
+						tagmask=0L;
+						break;
+					}
+				}
+			}
+			break;
+		default:
+			*text = "controls internal error";
+			return LDAP_OTHER;
+		}
+
+		if (( sc->sc_mask & tagmask ) == tagmask ) {
+			/* available extension */
+			if ( sc->sc_parse ) {
+				rc = sc->sc_parse( op, rs, control );
+				assert( rc != LDAP_UNAVAILABLE_CRITICAL_EXTENSION );
+
+			} else if ( control->ldctl_iscritical ) {
+				*text = "not yet implemented";
+				rc = LDAP_OTHER;
+			}
+
+
+		} else if ( control->ldctl_iscritical ) {
+			/* unavailable CRITICAL control */
+			*text = "critical extension is unavailable";
+			rc = LDAP_UNAVAILABLE_CRITICAL_EXTENSION;
+		}
+
+	} else if ( control->ldctl_iscritical ) {
+		/* unrecognized CRITICAL control */
+		*text = "critical extension is not recognized";
+		rc = LDAP_UNAVAILABLE_CRITICAL_EXTENSION;
+	}
+
+	return rc;
+}
+
+int get_ctrls(
+	Operation *op,
+	SlapReply *rs,
+	int sendres )
+{
+	int nctrls = 0;
+	ber_tag_t tag;
+	ber_len_t len;
+	char *opaque;
+	BerElement *ber = op->o_ber;
+	struct berval bv;
+#ifdef SLAP_CONTROL_X_WHATFAILED
+	/* NOTE: right now, slapd checks the validity of each control
+	 * while parsing.  As a consequence, it can only detect one
+	 * cause of failure at a time.  This results in returning
+	 * exactly one OID with the whatFailed control, or no control
+	 * at all.
+	 */
+	char *failed_oid = NULL;
+#endif
+
+	len = ber_pvt_ber_remaining(ber);
+
+	if( len == 0) {
+		/* no controls */
+		rs->sr_err = LDAP_SUCCESS;
+		return rs->sr_err;
+	}
+
+	if(( tag = ber_peek_tag( ber, &len )) != LDAP_TAG_CONTROLS ) {
+		if( tag == LBER_ERROR ) {
+			rs->sr_err = SLAPD_DISCONNECT;
+			rs->sr_text = "unexpected data in PDU";
+		}
+
+		goto return_results;
+	}
+
+	Debug( LDAP_DEBUG_TRACE,
+		"=> get_ctrls\n", 0, 0, 0 );
+
+	if( op->o_protocol < LDAP_VERSION3 ) {
+		rs->sr_err = SLAPD_DISCONNECT;
+		rs->sr_text = "controls require LDAPv3";
+		goto return_results;
+	}
+
+	/* one for first control, one for termination */
+	op->o_ctrls = op->o_tmpalloc( 2 * sizeof(LDAPControl *), op->o_tmpmemctx );
+
+#if 0
+	if( op->ctrls == NULL ) {
+		rs->sr_err = LDAP_NO_MEMORY;
+		rs->sr_text = "no memory";
+		goto return_results;
+	}
+#endif
+
+	op->o_ctrls[nctrls] = NULL;
+
+	/* step through each element */
+	for( tag = ber_first_element( ber, &len, &opaque );
+		tag != LBER_ERROR;
+		tag = ber_next_element( ber, &len, opaque ) )
+	{
+		LDAPControl *c;
+		LDAPControl **tctrls;
+
+		c = op->o_tmpalloc( sizeof(LDAPControl), op->o_tmpmemctx );
+		memset(c, 0, sizeof(LDAPControl));
+
+		/* allocate pointer space for current controls (nctrls)
+		 * + this control + extra NULL
+		 */
+		tctrls = op->o_tmprealloc( op->o_ctrls,
+			(nctrls+2) * sizeof(LDAPControl *), op->o_tmpmemctx );
+
+#if 0
+		if( tctrls == NULL ) {
+			ch_free( c );
+			ldap_controls_free(op->o_ctrls);
+			op->o_ctrls = NULL;
+
+			rs->sr_err = LDAP_NO_MEMORY;
+			rs->sr_text = "no memory";
+			goto return_results;
+		}
+#endif
+		op->o_ctrls = tctrls;
+
+		op->o_ctrls[nctrls++] = c;
+		op->o_ctrls[nctrls] = NULL;
+
+		tag = ber_scanf( ber, "{m" /*}*/, &bv );
+		c->ldctl_oid = bv.bv_val;
+
+		if( tag == LBER_ERROR ) {
+			Debug( LDAP_DEBUG_TRACE, "=> get_ctrls: get oid failed.\n",
+				0, 0, 0 );
+
+			slap_free_ctrls( op, op->o_ctrls );
+			op->o_ctrls = NULL;
+			rs->sr_err = SLAPD_DISCONNECT;
+			rs->sr_text = "decoding controls error";
+			goto return_results;
+
+		} else if( c->ldctl_oid == NULL ) {
+			Debug( LDAP_DEBUG_TRACE,
+				"get_ctrls: conn %lu got empty OID.\n",
+				op->o_connid, 0, 0 );
+
+			slap_free_ctrls( op, op->o_ctrls );
+			op->o_ctrls = NULL;
+			rs->sr_err = LDAP_PROTOCOL_ERROR;
+			rs->sr_text = "OID field is empty";
+			goto return_results;
+		}
+
+		tag = ber_peek_tag( ber, &len );
+
+		if( tag == LBER_BOOLEAN ) {
+			ber_int_t crit;
+			tag = ber_scanf( ber, "b", &crit );
+
+			if( tag == LBER_ERROR ) {
+				Debug( LDAP_DEBUG_TRACE, "=> get_ctrls: get crit failed.\n",
+					0, 0, 0 );
+				slap_free_ctrls( op, op->o_ctrls );
+				op->o_ctrls = NULL;
+				rs->sr_err = SLAPD_DISCONNECT;
+				rs->sr_text = "decoding controls error";
+				goto return_results;
+			}
+
+			c->ldctl_iscritical = (crit != 0);
+			tag = ber_peek_tag( ber, &len );
+		}
+
+		if( tag == LBER_OCTETSTRING ) {
+			tag = ber_scanf( ber, "m", &c->ldctl_value );
+
+			if( tag == LBER_ERROR ) {
+				Debug( LDAP_DEBUG_TRACE, "=> get_ctrls: conn %lu: "
+					"%s (%scritical): get value failed.\n",
+					op->o_connid, c->ldctl_oid,
+					c->ldctl_iscritical ? "" : "non" );
+				slap_free_ctrls( op, op->o_ctrls );
+				op->o_ctrls = NULL;
+				rs->sr_err = SLAPD_DISCONNECT;
+				rs->sr_text = "decoding controls error";
+				goto return_results;
+			}
+		}
+
+		Debug( LDAP_DEBUG_TRACE,
+			"=> get_ctrls: oid=\"%s\" (%scritical)\n",
+			c->ldctl_oid, c->ldctl_iscritical ? "" : "non", 0 );
+
+		rs->sr_err = slap_parse_ctrl( op, rs, c, &rs->sr_text );
+		if ( rs->sr_err != LDAP_SUCCESS ) {
+#ifdef SLAP_CONTROL_X_WHATFAILED
+			failed_oid = c->ldctl_oid;
+#endif
+			goto return_results;
+		}
+	}
+
+return_results:
+	Debug( LDAP_DEBUG_TRACE,
+		"<= get_ctrls: n=%d rc=%d err=\"%s\"\n",
+		nctrls, rs->sr_err, rs->sr_text ? rs->sr_text : "");
+
+	if( sendres && rs->sr_err != LDAP_SUCCESS ) {
+		if( rs->sr_err == SLAPD_DISCONNECT ) {
+			rs->sr_err = LDAP_PROTOCOL_ERROR;
+			send_ldap_disconnect( op, rs );
+			rs->sr_err = SLAPD_DISCONNECT;
+		} else {
+#ifdef SLAP_CONTROL_X_WHATFAILED
+			/* might have not been parsed yet? */
+			if ( failed_oid != NULL ) {
+				if ( !get_whatFailed( op ) ) {
+					/* look it up */
+
+					/* step through each remaining element */
+					for ( ; tag != LBER_ERROR; tag = ber_next_element( ber, &len, opaque ) )
+					{
+						LDAPControl c = { 0 };
+
+						tag = ber_scanf( ber, "{m" /*}*/, &bv );
+						c.ldctl_oid = bv.bv_val;
+
+						if ( tag == LBER_ERROR ) {
+							slap_free_ctrls( op, op->o_ctrls );
+							op->o_ctrls = NULL;
+							break;
+
+						} else if ( c.ldctl_oid == NULL ) {
+							slap_free_ctrls( op, op->o_ctrls );
+							op->o_ctrls = NULL;
+							break;
+						}
+
+						tag = ber_peek_tag( ber, &len );
+						if ( tag == LBER_BOOLEAN ) {
+							ber_int_t crit;
+							tag = ber_scanf( ber, "b", &crit );
+							if( tag == LBER_ERROR ) {
+								slap_free_ctrls( op, op->o_ctrls );
+								op->o_ctrls = NULL;
+								break;
+							}
+
+							tag = ber_peek_tag( ber, &len );
+						}
+
+						if ( tag == LBER_OCTETSTRING ) {
+							tag = ber_scanf( ber, "m", &c.ldctl_value );
+
+							if( tag == LBER_ERROR ) {
+								slap_free_ctrls( op, op->o_ctrls );
+								op->o_ctrls = NULL;
+								break;
+							}
+						}
+
+						if ( strcmp( c.ldctl_oid, LDAP_CONTROL_X_WHATFAILED ) == 0 ) {
+							const char *text;
+							slap_parse_ctrl( op, rs, &c, &text );
+							break;
+						}
+					}
+				}
+
+				if ( get_whatFailed( op ) ) {
+					char *oids[ 2 ];
+					oids[ 0 ] = failed_oid;
+					oids[ 1 ] = NULL;
+					slap_ctrl_whatFailed_add( op, rs, oids );
+				}
+			}
+#endif
+
+			send_ldap_result( op, rs );
+		}
+	}
+
+	return rs->sr_err;
+}
+
+int
+slap_remove_control(
+	Operation	*op,
+	SlapReply	*rs,
+	int		ctrl,
+	BI_chk_controls	fnc )
+{
+	int		i, j;
+
+	switch ( op->o_ctrlflag[ ctrl ] ) {
+	case SLAP_CONTROL_NONCRITICAL:
+		for ( i = 0, j = -1; op->o_ctrls[ i ] != NULL; i++ ) {
+			if ( strcmp( op->o_ctrls[ i ]->ldctl_oid,
+				slap_known_controls[ ctrl - 1 ] ) == 0 )
+			{
+				j = i;
+			}
+		}
+
+		if ( j == -1 ) {
+			rs->sr_err = LDAP_OTHER;
+			break;
+		}
+
+		if ( fnc ) {
+			(void)fnc( op, rs );
+		}
+
+		op->o_tmpfree( op->o_ctrls[ j ], op->o_tmpmemctx );
+
+		if ( i > 1 ) {
+			AC_MEMCPY( &op->o_ctrls[ j ], &op->o_ctrls[ j + 1 ],
+				( i - j ) * sizeof( LDAPControl * ) );
+
+		} else {
+			op->o_tmpfree( op->o_ctrls, op->o_tmpmemctx );
+			op->o_ctrls = NULL;
+		}
+
+		op->o_ctrlflag[ ctrl ] = SLAP_CONTROL_IGNORED;
+
+		Debug( LDAP_DEBUG_ANY, "%s: "
+			"non-critical control \"%s\" not supported; stripped.\n",
+			op->o_log_prefix, slap_known_controls[ ctrl ], 0 );
+		/* fall thru */
+
+	case SLAP_CONTROL_IGNORED:
+	case SLAP_CONTROL_NONE:
+		rs->sr_err = SLAP_CB_CONTINUE;
+		break;
+
+	case SLAP_CONTROL_CRITICAL:
+		rs->sr_err = LDAP_UNAVAILABLE_CRITICAL_EXTENSION;
+		if ( fnc ) {
+			(void)fnc( op, rs );
+		}
+		Debug( LDAP_DEBUG_ANY, "%s: "
+			"critical control \"%s\" not supported.\n",
+			op->o_log_prefix, slap_known_controls[ ctrl ], 0 );
+		break;
+
+	default:
+		/* handle all cases! */
+		assert( 0 );
+	}
+
+	return rs->sr_err;
+}
+
+static int parseDontUseCopy (
+	Operation *op,
+	SlapReply *rs,
+	LDAPControl *ctrl )
+{
+	if ( op->o_dontUseCopy != SLAP_CONTROL_NONE ) {
+		rs->sr_text = "dontUseCopy control specified multiple times";
+		return LDAP_PROTOCOL_ERROR;
+	}
+
+	if ( !BER_BVISNULL( &ctrl->ldctl_value )) {
+		rs->sr_text = "dontUseCopy control value not absent";
+		return LDAP_PROTOCOL_ERROR;
+	}
+
+	if ( ( global_disallows & SLAP_DISALLOW_DONTUSECOPY_N_CRIT )
+		&& !ctrl->ldctl_iscritical )
+	{
+		rs->sr_text = "dontUseCopy criticality of FALSE not allowed";
+		return LDAP_PROTOCOL_ERROR;
+	}
+
+	op->o_dontUseCopy = ctrl->ldctl_iscritical
+		? SLAP_CONTROL_CRITICAL
+		: SLAP_CONTROL_NONCRITICAL;
+
+	return LDAP_SUCCESS;
+}
+
+static int parseRelax (
+	Operation *op,
+	SlapReply *rs,
+	LDAPControl *ctrl )
+{
+	if ( op->o_relax != SLAP_CONTROL_NONE ) {
+		rs->sr_text = "relax control specified multiple times";
+		return LDAP_PROTOCOL_ERROR;
+	}
+
+	if ( !BER_BVISNULL( &ctrl->ldctl_value )) {
+		rs->sr_text = "relax control value not absent";
+		return LDAP_PROTOCOL_ERROR;
+	}
+
+	op->o_relax = ctrl->ldctl_iscritical
+		? SLAP_CONTROL_CRITICAL
+		: SLAP_CONTROL_NONCRITICAL;
+
+	return LDAP_SUCCESS;
+}
+
+static int parseManageDSAit (
+	Operation *op,
+	SlapReply *rs,
+	LDAPControl *ctrl )
+{
+	if ( op->o_managedsait != SLAP_CONTROL_NONE ) {
+		rs->sr_text = "manageDSAit control specified multiple times";
+		return LDAP_PROTOCOL_ERROR;
+	}
+
+	if ( !BER_BVISNULL( &ctrl->ldctl_value )) {
+		rs->sr_text = "manageDSAit control value not absent";
+		return LDAP_PROTOCOL_ERROR;
+	}
+
+	op->o_managedsait = ctrl->ldctl_iscritical
+		? SLAP_CONTROL_CRITICAL
+		: SLAP_CONTROL_NONCRITICAL;
+
+	return LDAP_SUCCESS;
+}
+
+static int parseProxyAuthz (
+	Operation *op,
+	SlapReply *rs,
+	LDAPControl *ctrl )
+{
+	int		rc;
+	struct berval	dn = BER_BVNULL;
+
+	if ( op->o_proxy_authz != SLAP_CONTROL_NONE ) {
+		rs->sr_text = "proxy authorization control specified multiple times";
+		return LDAP_PROTOCOL_ERROR;
+	}
+
+	if ( BER_BVISNULL( &ctrl->ldctl_value )) {
+		rs->sr_text = "proxy authorization control value absent";
+		return LDAP_PROTOCOL_ERROR;
+	}
+
+	if ( ( global_disallows & SLAP_DISALLOW_PROXY_AUTHZ_N_CRIT )
+		&& !ctrl->ldctl_iscritical )
+	{
+		rs->sr_text = "proxied authorization criticality of FALSE not allowed";
+		return LDAP_PROTOCOL_ERROR;
+	}
+
+	if ( !( global_allows & SLAP_ALLOW_PROXY_AUTHZ_ANON )
+		&& BER_BVISEMPTY( &op->o_ndn ) )
+	{
+		rs->sr_text = "anonymous proxied authorization not allowed";
+		return LDAP_PROXIED_AUTHORIZATION_DENIED;
+	}
+
+	op->o_proxy_authz = ctrl->ldctl_iscritical
+		? SLAP_CONTROL_CRITICAL
+		: SLAP_CONTROL_NONCRITICAL;
+
+	Debug( LDAP_DEBUG_ARGS,
+		"parseProxyAuthz: conn %lu authzid=\"%s\"\n", 
+		op->o_connid,
+		ctrl->ldctl_value.bv_len ?  ctrl->ldctl_value.bv_val : "anonymous",
+		0 );
+
+	if ( BER_BVISEMPTY( &ctrl->ldctl_value )) {
+		Debug( LDAP_DEBUG_TRACE,
+			"parseProxyAuthz: conn=%lu anonymous\n", 
+			op->o_connid, 0, 0 );
+
+		/* anonymous */
+		if ( !BER_BVISNULL( &op->o_ndn ) ) {
+			op->o_ndn.bv_val[ 0 ] = '\0';
+		}
+		op->o_ndn.bv_len = 0;
+
+		if ( !BER_BVISNULL( &op->o_dn ) ) {
+			op->o_dn.bv_val[ 0 ] = '\0';
+		}
+		op->o_dn.bv_len = 0;
+
+		return LDAP_SUCCESS;
+	}
+
+	rc = slap_sasl_getdn( op->o_conn, op, &ctrl->ldctl_value,
+			NULL, &dn, SLAP_GETDN_AUTHZID );
+
+	/* FIXME: empty DN in proxyAuthz control should be legal... */
+	if( rc != LDAP_SUCCESS /* || !dn.bv_len */ ) {
+		if ( dn.bv_val ) {
+			ch_free( dn.bv_val );
+		}
+		rs->sr_text = "authzId mapping failed";
+		return LDAP_PROXIED_AUTHORIZATION_DENIED;
+	}
+
+	Debug( LDAP_DEBUG_TRACE,
+		"parseProxyAuthz: conn=%lu \"%s\"\n", 
+		op->o_connid,
+		dn.bv_len ? dn.bv_val : "(NULL)", 0 );
+
+	rc = slap_sasl_authorized( op, &op->o_ndn, &dn );
+
+	if ( rc ) {
+		ch_free( dn.bv_val );
+		rs->sr_text = "not authorized to assume identity";
+		return LDAP_PROXIED_AUTHORIZATION_DENIED;
+	}
+
+	ch_free( op->o_ndn.bv_val );
+
+	/*
+	 * NOTE: since slap_sasl_getdn() returns a normalized dn,
+	 * from now on op->o_dn is normalized
+	 */
+	op->o_ndn = dn;
+	ber_bvreplace( &op->o_dn, &dn );
+
+	Statslog( LDAP_DEBUG_STATS, "%s PROXYAUTHZ dn=\"%s\"\n",
+	    op->o_log_prefix, dn.bv_val, 0, 0, 0 );
+
+	return LDAP_SUCCESS;
+}
+
+static int parseNoOp (
+	Operation *op,
+	SlapReply *rs,
+	LDAPControl *ctrl )
+{
+	if ( op->o_noop != SLAP_CONTROL_NONE ) {
+		rs->sr_text = "noop control specified multiple times";
+		return LDAP_PROTOCOL_ERROR;
+	}
+
+	if ( !BER_BVISNULL( &ctrl->ldctl_value ) ) {
+		rs->sr_text = "noop control value not empty";
+		return LDAP_PROTOCOL_ERROR;
+	}
+
+	op->o_noop = ctrl->ldctl_iscritical
+		? SLAP_CONTROL_CRITICAL
+		: SLAP_CONTROL_NONCRITICAL;
+
+	return LDAP_SUCCESS;
+}
+
+static int parsePagedResults (
+	Operation *op,
+	SlapReply *rs,
+	LDAPControl *ctrl )
+{
+	BerElementBuffer berbuf;
+	BerElement	*ber = (BerElement *)&berbuf;
+	struct berval	cookie;
+	PagedResultsState	*ps;
+	int		rc = LDAP_SUCCESS;
+	ber_tag_t	tag;
+	ber_int_t	size;
+
+	if ( op->o_pagedresults != SLAP_CONTROL_NONE ) {
+		rs->sr_text = "paged results control specified multiple times";
+		return LDAP_PROTOCOL_ERROR;
+	}
+
+	if ( BER_BVISNULL( &ctrl->ldctl_value ) ) {
+		rs->sr_text = "paged results control value is absent";
+		return LDAP_PROTOCOL_ERROR;
+	}
+
+	if ( BER_BVISEMPTY( &ctrl->ldctl_value ) ) {
+		rs->sr_text = "paged results control value is empty";
+		return LDAP_PROTOCOL_ERROR;
+	}
+
+	/* Parse the control value
+	 *	realSearchControlValue ::= SEQUENCE {
+	 *		size	INTEGER (0..maxInt),
+	 *				-- requested page size from client
+	 *				-- result set size estimate from server
+	 *		cookie	OCTET STRING
+	 * }
+	 */
+	ber_init2( ber, &ctrl->ldctl_value, LBER_USE_DER );
+
+	tag = ber_scanf( ber, "{im}", &size, &cookie );
+
+	if ( tag == LBER_ERROR ) {
+		rs->sr_text = "paged results control could not be decoded";
+		rc = LDAP_PROTOCOL_ERROR;
+		goto done;
+	}
+
+	if ( size < 0 ) {
+		rs->sr_text = "paged results control size invalid";
+		rc = LDAP_PROTOCOL_ERROR;
+		goto done;
+	}
+
+	ps = op->o_tmpalloc( sizeof(PagedResultsState), op->o_tmpmemctx );
+	*ps = op->o_conn->c_pagedresults_state;
+	ps->ps_size = size;
+	ps->ps_cookieval = cookie;
+	op->o_pagedresults_state = ps;
+	if ( !cookie.bv_len ) {
+		ps->ps_count = 0;
+		ps->ps_cookie = 0;
+		/* taint ps_cookie, to detect whether it's set */
+		op->o_conn->c_pagedresults_state.ps_cookie = NOID;
+	}
+
+	/* NOTE: according to RFC 2696 3.:
+
+    If the page size is greater than or equal to the sizeLimit value, the
+    server should ignore the control as the request can be satisfied in a
+    single page.
+
+	 * NOTE: this assumes that the op->ors_slimit be set
+	 * before the controls are parsed.     
+	 */
+
+	if ( op->ors_slimit > 0 && size >= op->ors_slimit ) {
+		op->o_pagedresults = SLAP_CONTROL_IGNORED;
+
+	} else if ( ctrl->ldctl_iscritical ) {
+		op->o_pagedresults = SLAP_CONTROL_CRITICAL;
+
+	} else {
+		op->o_pagedresults = SLAP_CONTROL_NONCRITICAL;
+	}
+
+done:;
+	return rc;
+}
+
+#ifdef SLAP_CONTROL_X_SORTEDRESULTS
+static int parseSortedResults (
+	Operation *op,
+	SlapReply *rs,
+	LDAPControl *ctrl )
+{
+	int		rc = LDAP_SUCCESS;
+
+	if ( op->o_sortedresults != SLAP_CONTROL_NONE ) {
+		rs->sr_text = "sorted results control specified multiple times";
+		return LDAP_PROTOCOL_ERROR;
+	}
+
+	if ( BER_BVISNULL( &ctrl->ldctl_value ) ) {
+		rs->sr_text = "sorted results control value is absent";
+		return LDAP_PROTOCOL_ERROR;
+	}
+
+	if ( BER_BVISEMPTY( &ctrl->ldctl_value ) ) {
+		rs->sr_text = "sorted results control value is empty";
+		return LDAP_PROTOCOL_ERROR;
+	}
+
+	/* blow off parsing the value */
+
+	op->o_sortedresults = ctrl->ldctl_iscritical
+		? SLAP_CONTROL_CRITICAL
+		: SLAP_CONTROL_NONCRITICAL;
+
+	return rc;
+}
+#endif
+
+static int parseAssert (
+	Operation *op,
+	SlapReply *rs,
+	LDAPControl *ctrl )
+{
+	BerElement	*ber;
+	struct berval	fstr = BER_BVNULL;
+
+	if ( op->o_assert != SLAP_CONTROL_NONE ) {
+		rs->sr_text = "assert control specified multiple times";
+		return LDAP_PROTOCOL_ERROR;
+	}
+
+	if ( BER_BVISNULL( &ctrl->ldctl_value )) {
+		rs->sr_text = "assert control value is absent";
+		return LDAP_PROTOCOL_ERROR;
+	}
+
+	if ( BER_BVISEMPTY( &ctrl->ldctl_value )) {
+		rs->sr_text = "assert control value is empty";
+		return LDAP_PROTOCOL_ERROR;
+	}
+
+	ber = ber_init( &(ctrl->ldctl_value) );
+	if (ber == NULL) {
+		rs->sr_text = "assert control: internal error";
+		return LDAP_OTHER;
+	}
+
+	rs->sr_err = get_filter( op, ber, (Filter **)&(op->o_assertion),
+		&rs->sr_text);
+	(void) ber_free( ber, 1 );
+	if( rs->sr_err != LDAP_SUCCESS ) {
+		if( rs->sr_err == SLAPD_DISCONNECT ) {
+			rs->sr_err = LDAP_PROTOCOL_ERROR;
+			send_ldap_disconnect( op, rs );
+			rs->sr_err = SLAPD_DISCONNECT;
+		} else {
+			send_ldap_result( op, rs );
+		}
+		if( op->o_assertion != NULL ) {
+			filter_free_x( op, op->o_assertion, 1 );
+			op->o_assertion = NULL;
+		}
+		return rs->sr_err;
+	}
+
+#ifdef LDAP_DEBUG
+	filter2bv_x( op, op->o_assertion, &fstr );
+
+	Debug( LDAP_DEBUG_ARGS, "parseAssert: conn %ld assert: %s\n",
+		op->o_connid, fstr.bv_len ? fstr.bv_val : "empty" , 0 );
+	op->o_tmpfree( fstr.bv_val, op->o_tmpmemctx );
+#endif
+
+	op->o_assert = ctrl->ldctl_iscritical
+		? SLAP_CONTROL_CRITICAL
+		: SLAP_CONTROL_NONCRITICAL;
+
+	rs->sr_err = LDAP_SUCCESS;
+	return LDAP_SUCCESS;
+}
+
+#define READMSG(post, msg) \
+	( post ? "postread control: " msg : "preread control: " msg )
+
+static int
+parseReadAttrs(
+	Operation *op,
+	SlapReply *rs,
+	LDAPControl *ctrl,
+	int post )
+{
+	ber_len_t	siz, off, i;
+	BerElement	*ber;
+	AttributeName	*an = NULL;
+
+	if ( ( post && op->o_postread != SLAP_CONTROL_NONE ) ||
+		( !post && op->o_preread != SLAP_CONTROL_NONE ) )
+	{
+		rs->sr_text = READMSG( post, "specified multiple times" );
+		return LDAP_PROTOCOL_ERROR;
+	}
+
+	if ( BER_BVISNULL( &ctrl->ldctl_value ) ) {
+		rs->sr_text = READMSG( post, "value is absent" );
+		return LDAP_PROTOCOL_ERROR;
+	}
+
+	if ( BER_BVISEMPTY( &ctrl->ldctl_value ) ) {
+		rs->sr_text = READMSG( post, "value is empty" );
+		return LDAP_PROTOCOL_ERROR;
+	}
+
+#ifdef LDAP_X_TXN
+	if ( op->o_txnSpec ) { /* temporary limitation */
+		rs->sr_text = READMSG( post, "cannot perform in transaction" );
+		return LDAP_UNWILLING_TO_PERFORM;
+	}
+#endif
+
+	ber = ber_init( &ctrl->ldctl_value );
+	if ( ber == NULL ) {
+		rs->sr_text = READMSG( post, "internal error" );
+		return LDAP_OTHER;
+	}
+
+	rs->sr_err = LDAP_SUCCESS;
+	siz = sizeof( AttributeName );
+	off = offsetof( AttributeName, an_name );
+	if ( ber_scanf( ber, "{M}", &an, &siz, off ) == LBER_ERROR ) {
+		rs->sr_text = READMSG( post, "decoding error" );
+		rs->sr_err = LDAP_PROTOCOL_ERROR;
+		goto done;
+	}
+
+	for ( i = 0; i < siz; i++ ) {
+		const char	*dummy = NULL;
+		int		rc;
+
+		an[i].an_desc = NULL;
+		an[i].an_oc = NULL;
+		an[i].an_flags = 0;
+		rc = slap_bv2ad( &an[i].an_name, &an[i].an_desc, &dummy );
+		if ( rc == LDAP_SUCCESS ) {
+			an[i].an_name = an[i].an_desc->ad_cname;
+
+		} else {
+			int			j;
+			static struct berval	special_attrs[] = {
+				BER_BVC( LDAP_NO_ATTRS ),
+				BER_BVC( LDAP_ALL_USER_ATTRIBUTES ),
+				BER_BVC( LDAP_ALL_OPERATIONAL_ATTRIBUTES ),
+				BER_BVNULL
+			};
+
+			/* deal with special attribute types */
+			for ( j = 0; !BER_BVISNULL( &special_attrs[ j ] ); j++ ) {
+				if ( bvmatch( &an[i].an_name, &special_attrs[ j ] ) ) {
+					an[i].an_name = special_attrs[ j ];
+					break;
+				}
+			}
+
+			if ( BER_BVISNULL( &special_attrs[ j ] ) && ctrl->ldctl_iscritical ) {
+				rs->sr_err = rc;
+				rs->sr_text = dummy ? dummy
+					: READMSG( post, "unknown attributeType" );
+				goto done;
+			}
+		}
+	}
+
+	if ( post ) {
+		op->o_postread_attrs = an;
+		op->o_postread = ctrl->ldctl_iscritical
+			? SLAP_CONTROL_CRITICAL
+			: SLAP_CONTROL_NONCRITICAL;
+	} else {
+		op->o_preread_attrs = an;
+		op->o_preread = ctrl->ldctl_iscritical
+			? SLAP_CONTROL_CRITICAL
+			: SLAP_CONTROL_NONCRITICAL;
+	}
+
+done:
+	(void) ber_free( ber, 1 );
+	return rs->sr_err;
+}
+
+static int parsePreRead (
+	Operation *op,
+	SlapReply *rs,
+	LDAPControl *ctrl )
+{
+	return parseReadAttrs( op, rs, ctrl, 0 );
+}
+
+static int parsePostRead (
+	Operation *op,
+	SlapReply *rs,
+	LDAPControl *ctrl )
+{
+	return parseReadAttrs( op, rs, ctrl, 1 );
+}
+
+static int parseValuesReturnFilter (
+	Operation *op,
+	SlapReply *rs,
+	LDAPControl *ctrl )
+{
+	BerElement	*ber;
+	struct berval	fstr = BER_BVNULL;
+
+	if ( op->o_valuesreturnfilter != SLAP_CONTROL_NONE ) {
+		rs->sr_text = "valuesReturnFilter control specified multiple times";
+		return LDAP_PROTOCOL_ERROR;
+	}
+
+	if ( BER_BVISNULL( &ctrl->ldctl_value )) {
+		rs->sr_text = "valuesReturnFilter control value is absent";
+		return LDAP_PROTOCOL_ERROR;
+	}
+
+	if ( BER_BVISEMPTY( &ctrl->ldctl_value )) {
+		rs->sr_text = "valuesReturnFilter control value is empty";
+		return LDAP_PROTOCOL_ERROR;
+	}
+
+	ber = ber_init( &(ctrl->ldctl_value) );
+	if (ber == NULL) {
+		rs->sr_text = "internal error";
+		return LDAP_OTHER;
+	}
+
+	rs->sr_err = get_vrFilter( op, ber,
+		(ValuesReturnFilter **)&(op->o_vrFilter), &rs->sr_text);
+
+	(void) ber_free( ber, 1 );
+
+	if( rs->sr_err != LDAP_SUCCESS ) {
+		if( rs->sr_err == SLAPD_DISCONNECT ) {
+			rs->sr_err = LDAP_PROTOCOL_ERROR;
+			send_ldap_disconnect( op, rs );
+			rs->sr_err = SLAPD_DISCONNECT;
+		} else {
+			send_ldap_result( op, rs );
+		}
+		if( op->o_vrFilter != NULL) {
+			vrFilter_free( op, op->o_vrFilter );
+			op->o_vrFilter = NULL;
+		}
+	}
+#ifdef LDAP_DEBUG
+	else {
+		vrFilter2bv( op, op->o_vrFilter, &fstr );
+	}
+
+	Debug( LDAP_DEBUG_ARGS, "	vrFilter: %s\n",
+		fstr.bv_len ? fstr.bv_val : "empty", 0, 0 );
+	op->o_tmpfree( fstr.bv_val, op->o_tmpmemctx );
+#endif
+
+	op->o_valuesreturnfilter = ctrl->ldctl_iscritical
+		? SLAP_CONTROL_CRITICAL
+		: SLAP_CONTROL_NONCRITICAL;
+
+	rs->sr_err = LDAP_SUCCESS;
+	return LDAP_SUCCESS;
+}
+
+static int parseSubentries (
+	Operation *op,
+	SlapReply *rs,
+	LDAPControl *ctrl )
+{
+	if ( op->o_subentries != SLAP_CONTROL_NONE ) {
+		rs->sr_text = "subentries control specified multiple times";
+		return LDAP_PROTOCOL_ERROR;
+	}
+
+	/* FIXME: should use BER library */
+	if( ( ctrl->ldctl_value.bv_len != 3 )
+		|| ( ctrl->ldctl_value.bv_val[0] != 0x01 )
+		|| ( ctrl->ldctl_value.bv_val[1] != 0x01 ))
+	{
+		rs->sr_text = "subentries control value encoding is bogus";
+		return LDAP_PROTOCOL_ERROR;
+	}
+
+	op->o_subentries = ctrl->ldctl_iscritical
+		? SLAP_CONTROL_CRITICAL
+		: SLAP_CONTROL_NONCRITICAL;
+
+	if (ctrl->ldctl_value.bv_val[2]) {
+		set_subentries_visibility( op );
+	}
+
+	return LDAP_SUCCESS;
+}
+
+static int parsePermissiveModify (
+	Operation *op,
+	SlapReply *rs,
+	LDAPControl *ctrl )
+{
+	if ( op->o_permissive_modify != SLAP_CONTROL_NONE ) {
+		rs->sr_text = "permissiveModify control specified multiple times";
+		return LDAP_PROTOCOL_ERROR;
+	}
+
+	if ( !BER_BVISNULL( &ctrl->ldctl_value )) {
+		rs->sr_text = "permissiveModify control value not absent";
+		return LDAP_PROTOCOL_ERROR;
+	}
+
+	op->o_permissive_modify = ctrl->ldctl_iscritical
+		? SLAP_CONTROL_CRITICAL
+		: SLAP_CONTROL_NONCRITICAL;
+
+	return LDAP_SUCCESS;
+}
+
+static int parseDomainScope (
+	Operation *op,
+	SlapReply *rs,
+	LDAPControl *ctrl )
+{
+	if ( op->o_domain_scope != SLAP_CONTROL_NONE ) {
+		rs->sr_text = "domainScope control specified multiple times";
+		return LDAP_PROTOCOL_ERROR;
+	}
+
+	/* this should be checking BVISNULL, but M$ clients are broken
+	 * and include the value even though the M$ spec says it must be
+	 * omitted. ITS#9100.
+	 */
+	if ( !BER_BVISEMPTY( &ctrl->ldctl_value )) {
+		rs->sr_text = "domainScope control value not absent";
+		return LDAP_PROTOCOL_ERROR;
+	}
+
+	op->o_domain_scope = ctrl->ldctl_iscritical
+		? SLAP_CONTROL_CRITICAL
+		: SLAP_CONTROL_NONCRITICAL;
+
+	return LDAP_SUCCESS;
+}
+
+#ifdef SLAP_CONTROL_X_TREE_DELETE
+static int parseTreeDelete (
+	Operation *op,
+	SlapReply *rs,
+	LDAPControl *ctrl )
+{
+	if ( op->o_tree_delete != SLAP_CONTROL_NONE ) {
+		rs->sr_text = "treeDelete control specified multiple times";
+		return LDAP_PROTOCOL_ERROR;
+	}
+
+	if ( !BER_BVISNULL( &ctrl->ldctl_value )) {
+		rs->sr_text = "treeDelete control value not absent";
+		return LDAP_PROTOCOL_ERROR;
+	}
+
+	op->o_tree_delete = ctrl->ldctl_iscritical
+		? SLAP_CONTROL_CRITICAL
+		: SLAP_CONTROL_NONCRITICAL;
+
+	return LDAP_SUCCESS;
+}
+#endif
+
+static int parseSearchOptions (
+	Operation *op,
+	SlapReply *rs,
+	LDAPControl *ctrl )
+{
+	BerElement *ber;
+	ber_int_t search_flags;
+	ber_tag_t tag;
+
+	if ( BER_BVISNULL( &ctrl->ldctl_value )) {
+		rs->sr_text = "searchOptions control value is absent";
+		return LDAP_PROTOCOL_ERROR;
+	}
+
+	if ( BER_BVISEMPTY( &ctrl->ldctl_value )) {
+		rs->sr_text = "searchOptions control value is empty";
+		return LDAP_PROTOCOL_ERROR;
+	}
+
+	ber = ber_init( &ctrl->ldctl_value );
+	if( ber == NULL ) {
+		rs->sr_text = "internal error";
+		return LDAP_OTHER;
+	}
+
+	tag = ber_scanf( ber, "{i}", &search_flags );
+	(void) ber_free( ber, 1 );
+
+	if ( tag == LBER_ERROR ) {
+		rs->sr_text = "searchOptions control decoding error";
+		return LDAP_PROTOCOL_ERROR;
+	}
+
+	if ( search_flags & ~(LDAP_SEARCH_FLAG_DOMAIN_SCOPE) ) {
+		/* Search flags not recognised so far,
+		 * including:
+		 *		LDAP_SEARCH_FLAG_PHANTOM_ROOT
+		 */
+		if ( ctrl->ldctl_iscritical ) {
+			rs->sr_text = "searchOptions contained unrecognized flag";
+			return LDAP_UNWILLING_TO_PERFORM;
+		}
+
+		/* Ignore */
+		Debug( LDAP_DEBUG_TRACE,
+			"searchOptions: conn=%lu unrecognized flag(s) 0x%x (non-critical)\n", 
+			op->o_connid, (unsigned)search_flags, 0 );
+
+		return LDAP_SUCCESS;
+	}
+
+	if ( search_flags & LDAP_SEARCH_FLAG_DOMAIN_SCOPE ) {
+		if ( op->o_domain_scope != SLAP_CONTROL_NONE ) {
+			rs->sr_text = "searchOptions control specified multiple times "
+				"or with domainScope control";
+			return LDAP_PROTOCOL_ERROR;
+		}
+
+		op->o_domain_scope = ctrl->ldctl_iscritical
+			? SLAP_CONTROL_CRITICAL
+			: SLAP_CONTROL_NONCRITICAL;
+	}
+
+	return LDAP_SUCCESS;
+}
+
+#ifdef SLAP_CONTROL_X_SESSION_TRACKING
+struct berval session_tracking_formats[] = {
+	BER_BVC( LDAP_CONTROL_X_SESSION_TRACKING_RADIUS_ACCT_SESSION_ID ),
+		BER_BVC( "RADIUS-Acct-Session-Id" ),
+	BER_BVC( LDAP_CONTROL_X_SESSION_TRACKING_RADIUS_ACCT_MULTI_SESSION_ID ),
+		BER_BVC( "RADIUS-Acct-Multi-Session-Id" ),
+	BER_BVC( LDAP_CONTROL_X_SESSION_TRACKING_USERNAME ),
+		BER_BVC( "USERNAME" ),
+
+	BER_BVNULL
+};
+
+static int parseSessionTracking(
+	Operation *op,
+	SlapReply *rs,
+	LDAPControl *ctrl )
+{
+	BerElement		*ber;
+	ber_tag_t		tag;
+	ber_len_t		len;
+	int			i, rc;
+
+	struct berval		sessionSourceIp = BER_BVNULL,
+				sessionSourceName = BER_BVNULL,
+				formatOID = BER_BVNULL,
+				sessionTrackingIdentifier = BER_BVNULL;
+
+	size_t			st_len, st_pos;
+
+	if ( ctrl->ldctl_iscritical ) {
+		rs->sr_text = "sessionTracking criticality is TRUE";
+		return LDAP_PROTOCOL_ERROR;
+	}
+
+	if ( BER_BVISNULL( &ctrl->ldctl_value ) ) {
+		rs->sr_text = "sessionTracking control value is absent";
+		return LDAP_PROTOCOL_ERROR;
+	}
+
+	if ( BER_BVISEMPTY( &ctrl->ldctl_value ) ) {
+		rs->sr_text = "sessionTracking control value is empty";
+		return LDAP_PROTOCOL_ERROR;
+	}
+
+	/* TODO: add the capability to determine if a client is allowed
+	 * to use this control, based on identity, ip and so */
+
+	ber = ber_init( &ctrl->ldctl_value );
+	if ( ber == NULL ) {
+		rs->sr_text = "internal error";
+		return LDAP_OTHER;
+	}
+
+	tag = ber_skip_tag( ber, &len );
+	if ( tag != LBER_SEQUENCE ) {
+		tag = LBER_ERROR;
+		goto error;
+	}
+
+	/* sessionSourceIp */
+	tag = ber_peek_tag( ber, &len );
+	if ( tag == LBER_DEFAULT ) {
+		tag = LBER_ERROR;
+		goto error;
+	}
+
+	if ( len == 0 ) {
+		tag = ber_skip_tag( ber, &len );
+
+	} else if ( len > 128 ) {
+		rs->sr_text = "sessionTracking.sessionSourceIp too long";
+		rs->sr_err = LDAP_PROTOCOL_ERROR;
+		goto error;
+
+	} else {
+		tag = ber_scanf( ber, "m", &sessionSourceIp );
+	}
+
+	if ( ldif_is_not_printable( sessionSourceIp.bv_val, sessionSourceIp.bv_len ) ) {
+		BER_BVZERO( &sessionSourceIp );
+	}
+
+	/* sessionSourceName */
+	tag = ber_peek_tag( ber, &len );
+	if ( tag == LBER_DEFAULT ) {
+		tag = LBER_ERROR;
+		goto error;
+	}
+
+	if ( len == 0 ) {
+		tag = ber_skip_tag( ber, &len );
+
+	} else if ( len > 65536 ) {
+		rs->sr_text = "sessionTracking.sessionSourceName too long";
+		rs->sr_err = LDAP_PROTOCOL_ERROR;
+		goto error;
+
+	} else {
+		tag = ber_scanf( ber, "m", &sessionSourceName );
+	}
+
+	if ( ldif_is_not_printable( sessionSourceName.bv_val, sessionSourceName.bv_len ) ) {
+		BER_BVZERO( &sessionSourceName );
+	}
+
+	/* formatOID */
+	tag = ber_peek_tag( ber, &len );
+	if ( tag == LBER_DEFAULT ) {
+		tag = LBER_ERROR;
+		goto error;
+	}
+
+	if ( len == 0 ) {
+		rs->sr_text = "sessionTracking.formatOID empty";
+		rs->sr_err = LDAP_PROTOCOL_ERROR;
+		goto error;
+
+	} else if ( len > 1024 ) {
+		rs->sr_text = "sessionTracking.formatOID too long";
+		rs->sr_err = LDAP_PROTOCOL_ERROR;
+		goto error;
+
+	} else {
+		tag = ber_scanf( ber, "m", &formatOID );
+	}
+
+	rc = numericoidValidate( NULL, &formatOID );
+	if ( rc != LDAP_SUCCESS ) {
+		rs->sr_text = "sessionTracking.formatOID invalid";
+		goto error;
+	}
+
+	for ( i = 0; !BER_BVISNULL( &session_tracking_formats[ i ] ); i += 2 )
+	{
+		if ( bvmatch( &formatOID, &session_tracking_formats[ i ] ) ) {
+			formatOID = session_tracking_formats[ i + 1 ];
+			break;
+		}
+	}
+
+	/* sessionTrackingIdentifier */
+	tag = ber_peek_tag( ber, &len );
+	if ( tag == LBER_DEFAULT ) {
+		tag = LBER_ERROR;
+		goto error;
+	}
+
+	if ( len == 0 ) {
+		tag = ber_skip_tag( ber, &len );
+
+	} else {
+		/* note: should not be more than 65536... */
+		tag = ber_scanf( ber, "m", &sessionTrackingIdentifier );
+		if ( ldif_is_not_printable( sessionTrackingIdentifier.bv_val, sessionTrackingIdentifier.bv_len ) ) {
+			/* we want the OID printed, at least */
+			BER_BVSTR( &sessionTrackingIdentifier, "" );
+		}
+	}
+
+	/* closure */
+	tag = ber_skip_tag( ber, &len );
+	if ( tag != LBER_DEFAULT || len != 0 ) {
+		tag = LBER_ERROR;
+		goto error;
+	}
+	tag = 0;
+
+	st_len = 0;
+	if ( !BER_BVISNULL( &sessionSourceIp ) ) {
+		st_len += STRLENOF( "IP=" ) + sessionSourceIp.bv_len;
+	}
+	if ( !BER_BVISNULL( &sessionSourceName ) ) {
+		if ( st_len ) st_len++;
+		st_len += STRLENOF( "NAME=" ) + sessionSourceName.bv_len;
+	}
+	if ( !BER_BVISNULL( &sessionTrackingIdentifier ) ) {
+		if ( st_len ) st_len++;
+		st_len += formatOID.bv_len + STRLENOF( "=" )
+			+ sessionTrackingIdentifier.bv_len;
+	}
+
+	if ( st_len == 0 ) {
+		goto error;
+	}
+
+	st_len += STRLENOF( " []" );
+	st_pos = strlen( op->o_log_prefix );
+
+	if ( sizeof( op->o_log_prefix ) - st_pos > st_len ) {
+		char	*ptr = &op->o_log_prefix[ st_pos ];
+
+		ptr = lutil_strcopy( ptr, " [" /*]*/ );
+
+		st_len = 0;
+		if ( !BER_BVISNULL( &sessionSourceIp ) ) {
+			ptr = lutil_strcopy( ptr, "IP=" );
+			ptr = lutil_strcopy( ptr, sessionSourceIp.bv_val );
+			st_len++;
+		}
+
+		if ( !BER_BVISNULL( &sessionSourceName ) ) {
+			if ( st_len ) *ptr++ = ' ';
+			ptr = lutil_strcopy( ptr, "NAME=" );
+			ptr = lutil_strcopy( ptr, sessionSourceName.bv_val );
+			st_len++;
+		}
+
+		if ( !BER_BVISNULL( &sessionTrackingIdentifier ) ) {
+			if ( st_len ) *ptr++ = ' ';
+			ptr = lutil_strcopy( ptr, formatOID.bv_val );
+			*ptr++ = '=';
+			ptr = lutil_strcopy( ptr, sessionTrackingIdentifier.bv_val );
+		}
+
+		*ptr++ = /*[*/ ']';
+		*ptr = '\0';
+	}
+
+error:;
+	(void)ber_free( ber, 1 );
+
+	if ( tag == LBER_ERROR ) {
+		rs->sr_text = "sessionTracking control decoding error";
+		return LDAP_PROTOCOL_ERROR;
+	}
+
+
+	return rs->sr_err;
+}
+
+int
+slap_ctrl_session_tracking_add(
+	Operation *op,
+	SlapReply *rs,
+	struct berval *ip,
+	struct berval *name,
+	struct berval *id,
+	LDAPControl *ctrl )
+{
+	BerElementBuffer berbuf;
+	BerElement	*ber = (BerElement *)&berbuf;
+
+	static struct berval	oid = BER_BVC( LDAP_CONTROL_X_SESSION_TRACKING_USERNAME );
+
+	assert( ctrl != NULL );
+
+	ber_init2( ber, NULL, LBER_USE_DER );
+
+	ber_printf( ber, "{OOOO}", ip, name, &oid, id ); 
+
+	if ( ber_flatten2( ber, &ctrl->ldctl_value, 0 ) == -1 ) {
+		rs->sr_err = LDAP_OTHER;
+		goto done;
+	}
+
+	ctrl->ldctl_oid = LDAP_CONTROL_X_SESSION_TRACKING;
+	ctrl->ldctl_iscritical = 0;
+
+	rs->sr_err = LDAP_SUCCESS;
+
+done:;
+	return rs->sr_err;
+}
+
+int
+slap_ctrl_session_tracking_request_add( Operation *op, SlapReply *rs, LDAPControl *ctrl )
+{
+	static struct berval	bv_unknown = BER_BVC( SLAP_STRING_UNKNOWN );
+	struct berval		ip = BER_BVNULL,
+				name = BER_BVNULL,
+				id = BER_BVNULL;
+
+	if ( !BER_BVISNULL( &op->o_conn->c_peer_name ) &&
+		memcmp( op->o_conn->c_peer_name.bv_val, "IP=", STRLENOF( "IP=" ) ) == 0 )
+	{
+		char	*ptr;
+
+		ip.bv_val = op->o_conn->c_peer_name.bv_val + STRLENOF( "IP=" );
+		ip.bv_len = op->o_conn->c_peer_name.bv_len - STRLENOF( "IP=" );
+
+		ptr = ber_bvchr( &ip, ':' );
+		if ( ptr ) {
+			ip.bv_len = ptr - ip.bv_val;
+		}
+	}
+
+	if ( !BER_BVISNULL( &op->o_conn->c_peer_domain ) &&
+		!bvmatch( &op->o_conn->c_peer_domain, &bv_unknown ) )
+	{
+		name = op->o_conn->c_peer_domain;
+	}
+
+	if ( !BER_BVISNULL( &op->o_dn ) && !BER_BVISEMPTY( &op->o_dn ) ) {
+		id = op->o_dn;
+	}
+
+	return slap_ctrl_session_tracking_add( op, rs, &ip, &name, &id, ctrl );
+}
+#endif
+
+#ifdef SLAP_CONTROL_X_WHATFAILED
+static int parseWhatFailed(
+	Operation *op,
+	SlapReply *rs,
+	LDAPControl *ctrl )
+{
+	if ( op->o_whatFailed != SLAP_CONTROL_NONE ) {
+		rs->sr_text = "\"WHat Failed?\" control specified multiple times";
+		return LDAP_PROTOCOL_ERROR;
+	}
+
+	if ( !BER_BVISNULL( &ctrl->ldctl_value )) {
+		rs->sr_text = "\"What Failed?\" control value not absent";
+		return LDAP_PROTOCOL_ERROR;
+	}
+
+	op->o_whatFailed = ctrl->ldctl_iscritical
+		? SLAP_CONTROL_CRITICAL
+		: SLAP_CONTROL_NONCRITICAL;
+
+	return LDAP_SUCCESS;
+}
+
+int
+slap_ctrl_whatFailed_add(
+	Operation *op,
+	SlapReply *rs,
+	char **oids )
+{
+	BerElementBuffer berbuf;
+	BerElement *ber = (BerElement *) &berbuf;
+	LDAPControl **ctrls = NULL;
+	struct berval ctrlval;
+	int i, rc = LDAP_SUCCESS;
+
+	ber_init2( ber, NULL, LBER_USE_DER );
+	ber_set_option( ber, LBER_OPT_BER_MEMCTX, &op->o_tmpmemctx );
+	ber_printf( ber, "[" /*]*/ );
+	for ( i = 0; oids[ i ] != NULL; i++ ) {
+		ber_printf( ber, "s", oids[ i ] );
+	}
+	ber_printf( ber, /*[*/ "]" );
+
+	if ( ber_flatten2( ber, &ctrlval, 0 ) == -1 ) {
+		rc = LDAP_OTHER;
+		goto done;
+	}
+
+	i = 0;
+	if ( rs->sr_ctrls != NULL ) {
+		for ( ; rs->sr_ctrls[ i ] != NULL; i++ ) {
+			if ( strcmp( rs->sr_ctrls[ i ]->ldctl_oid, LDAP_CONTROL_X_WHATFAILED ) != 0 ) {
+				/* TODO: add */
+				assert( 0 );
+			}
+		}
+	}
+
+	ctrls = op->o_tmprealloc( rs->sr_ctrls,
+			sizeof(LDAPControl *)*( i + 2 )
+			+ sizeof(LDAPControl)
+			+ ctrlval.bv_len + 1,
+			op->o_tmpmemctx );
+	if ( ctrls == NULL ) {
+		rc = LDAP_OTHER;
+		goto done;
+	}
+	ctrls[ i + 1 ] = NULL;
+	ctrls[ i ] = (LDAPControl *)&ctrls[ i + 2 ];
+	ctrls[ i ]->ldctl_oid = LDAP_CONTROL_X_WHATFAILED;
+	ctrls[ i ]->ldctl_iscritical = 0;
+	ctrls[ i ]->ldctl_value.bv_val = (char *)&ctrls[ i ][ 1 ];
+	AC_MEMCPY( ctrls[ i ]->ldctl_value.bv_val, ctrlval.bv_val, ctrlval.bv_len + 1 );
+	ctrls[ i ]->ldctl_value.bv_len = ctrlval.bv_len;
+
+	ber_free_buf( ber );
+
+	rs->sr_ctrls = ctrls;
+
+done:;
+	return rc;
+}
+#endif