--- servers/slapd/filter.c	2001/12/07 15:43:18	1.13.4.10
+++ servers/slapd/filter.c	2004/09/04 02:54:30	1.124
@@ -1,8 +1,27 @@
 /* filter.c - routines for parsing and dealing with filters */
-/* $OpenLDAP: pkg/ldap/servers/slapd/filter.c,v 1.13.4.9 2001/08/31 20:24:17 kurt Exp $ */
-/*
- * Copyright 1998-2000 The OpenLDAP Foundation, All Rights Reserved.
- * COPYING RESTRICTIONS APPLY, see COPYRIGHT file
+/* $OpenLDAP: pkg/ldap/servers/slapd/filter.c,v 1.123 2004/05/19 17:39:40 kurt Exp $ */
+/* This work is part of OpenLDAP Software <http://www.openldap.org/>.
+ *
+ * Copyright 1998-2004 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>.
+ */
+/* Portions Copyright (c) 1995 Regents of the University of Michigan.
+ * All rights reserved.
+ *
+ * Redistribution and use in source and binary forms are permitted
+ * provided that this notice is preserved and that due credit is given
+ * to the University of Michigan at Ann Arbor. The name of the University
+ * may not be used to endorse or promote products derived from this
+ * software without specific prior written permission. This software
+ * is provided ``as is'' without express or implied warranty.
  */
 
 #include "portable.h"
@@ -15,40 +34,46 @@
 #include "slap.h"
 
 static int	get_filter_list(
-	Connection *conn,
+	Operation *op,
 	BerElement *ber,
 	Filter **f,
-	char **fstr,
 	const char **text );
 
-static int	get_substring_filter(
-	Connection *conn,
+static int	get_ssa(
+	Operation *op,
 	BerElement *ber,
-	Filter *f,
-	char **fstr,
+	SubstringsAssertion **s,
 	const char **text );
 
-static int filter_escape_value(
+static int filter_escape_value_x(
 	struct berval *in,
-	struct berval *out );
+	struct berval *out,
+	void *ctx );
+
+static void simple_vrFilter2bv(
+	Operation *op,
+	ValuesReturnFilter *f,
+	struct berval *fstr );
+
+static int	get_simple_vrFilter(
+	Operation *op,
+	BerElement *ber,
+	ValuesReturnFilter **f,
+	const char **text );
 
 int
 get_filter(
-	Connection *conn,
+	Operation *op,
 	BerElement *ber,
 	Filter **filt,
-	char **fstr,
 	const char **text )
 {
 	ber_tag_t	tag;
 	ber_len_t	len;
 	int		err;
-	Filter		*f;
-	char		*ftmp = NULL;
-	struct berval escaped;
+	Filter		f;
 
 	Debug( LDAP_DEBUG_FILTER, "begin get_filter\n", 0, 0, 0 );
-
 	/*
 	 * A filter looks like this coming in:
 	 *	Filter ::= CHOICE {
@@ -61,23 +86,23 @@ get_filter(
 	 *		lessOrEqual	[6]	AttributeValueAssertion,
 	 *		present		[7]	AttributeType,,
 	 *		approxMatch	[8]	AttributeValueAssertion
-	 *		extensibleMatch [9] MatchingRuleAssertion
+	 *		extensibleMatch [9]	MatchingRuleAssertion
 	 *	}
 	 *
 	 *	SubstringFilter ::= SEQUENCE {
-	 *		type               AttributeType,
+	 *		type		   AttributeType,
 	 *		SEQUENCE OF CHOICE {
-	 *			initial          [0] IA5String,
-	 *			any              [1] IA5String,
-	 *			final            [2] IA5String
+	 *			initial		 [0] IA5String,
+	 *			any		 [1] IA5String,
+	 *			final		 [2] IA5String
 	 *		}
 	 *	}
 	 *
-     *  MatchingRuleAssertion ::= SEQUENCE {
-     *          matchingRule    [1] MatchingRuleId OPTIONAL,
-     *          type            [2] AttributeDescription OPTIONAL,
-     *          matchValue      [3] AssertionValue,
-     *          dnAttributes    [4] BOOLEAN DEFAULT FALSE
+	 *	MatchingRuleAssertion ::= SEQUENCE {
+	 *		matchingRule	[1] MatchingRuleId OPTIONAL,
+	 *		type		[2] AttributeDescription OPTIONAL,
+	 *		matchValue	[3] AssertionValue,
+	 *		dnAttributes	[4] BOOLEAN DEFAULT FALSE
 	 *	}
 	 *
 	 */
@@ -89,252 +114,200 @@ get_filter(
 		return SLAPD_DISCONNECT;
 	}
 
-	f = (Filter *) ch_malloc( sizeof(Filter) );
-	f->f_next = NULL;
-
 	err = LDAP_SUCCESS;
-	*fstr = NULL;
-	f->f_choice = tag; 
 
-	switch ( f->f_choice ) {
+	f.f_next = NULL;
+	f.f_choice = tag; 
+
+	switch ( f.f_choice ) {
 	case LDAP_FILTER_EQUALITY:
 		Debug( LDAP_DEBUG_FILTER, "EQUALITY\n", 0, 0, 0 );
-
-		err = get_ava( ber, &f->f_ava, SLAP_MR_EQUALITY, text );
+		err = get_ava( op, ber, &f.f_ava, SLAP_MR_EQUALITY, text );
 		if ( err != LDAP_SUCCESS ) {
 			break;
 		}
 
-		assert( f->f_ava != NULL );
-
-		filter_escape_value( f->f_av_value, &escaped );
-
-		*fstr = ch_malloc( sizeof("(=)")
-			+ f->f_av_desc->ad_cname->bv_len
-			+ escaped.bv_len );
-
-		sprintf( *fstr, "(%s=%s)",
-			f->f_av_desc->ad_cname->bv_val,
-		    escaped.bv_val );
-
-		ber_memfree( escaped.bv_val );
+		assert( f.f_ava != NULL );
 		break;
 
 	case LDAP_FILTER_SUBSTRINGS:
 		Debug( LDAP_DEBUG_FILTER, "SUBSTRINGS\n", 0, 0, 0 );
-		err = get_substring_filter( conn, ber, f, fstr, text );
+		err = get_ssa( op, ber, &f.f_sub, text );
+		if( err != LDAP_SUCCESS ) {
+			break;
+		}
+		assert( f.f_sub != NULL );
 		break;
 
 	case LDAP_FILTER_GE:
 		Debug( LDAP_DEBUG_FILTER, "GE\n", 0, 0, 0 );
-
-		err = get_ava( ber, &f->f_ava, SLAP_MR_ORDERING, text );
+		err = get_ava( op, ber, &f.f_ava, SLAP_MR_ORDERING, text );
 		if ( err != LDAP_SUCCESS ) {
 			break;
 		}
-
-		filter_escape_value( f->f_av_value, &escaped );
-
-		*fstr = ch_malloc( sizeof("(>=)")
-			+ f->f_av_desc->ad_cname->bv_len
-			+ escaped.bv_len );
-
-		sprintf( *fstr, "(%s>=%s)",
-			f->f_av_desc->ad_cname->bv_val,
-		    escaped.bv_val );
-
-		ber_memfree( escaped.bv_val );
+		assert( f.f_ava != NULL );
 		break;
 
 	case LDAP_FILTER_LE:
 		Debug( LDAP_DEBUG_FILTER, "LE\n", 0, 0, 0 );
-
-		err = get_ava( ber, &f->f_ava, SLAP_MR_ORDERING, text );
+		err = get_ava( op, ber, &f.f_ava, SLAP_MR_ORDERING, text );
 		if ( err != LDAP_SUCCESS ) {
 			break;
 		}
-
-
-		filter_escape_value( f->f_av_value, &escaped );
-
-		*fstr = ch_malloc( sizeof("(<=)")
-			+ f->f_av_desc->ad_cname->bv_len
-			+ escaped.bv_len );
-
-		sprintf( *fstr, "(%s<=%s)",
-			f->f_av_desc->ad_cname->bv_val,
-		    escaped.bv_val );
-
-		ber_memfree( escaped.bv_val );
+		assert( f.f_ava != NULL );
 		break;
 
 	case LDAP_FILTER_PRESENT: {
 		struct berval type;
 
 		Debug( LDAP_DEBUG_FILTER, "PRESENT\n", 0, 0, 0 );
-
-		if ( ber_scanf( ber, "o", &type ) == LBER_ERROR ) {
+		if ( ber_scanf( ber, "m", &type ) == LBER_ERROR ) {
 			err = SLAPD_DISCONNECT;
 			*text = "error decoding filter";
 			break;
 		}
 
-		f->f_desc = NULL;
-		err = slap_bv2ad( &type, &f->f_desc, text );
+		f.f_desc = NULL;
+		err = slap_bv2ad( &type, &f.f_desc, text );
 
 		if( err != LDAP_SUCCESS ) {
 			/* unrecognized attribute description or other error */
-			f->f_choice = SLAPD_FILTER_COMPUTED;
-			f->f_result = LDAP_COMPARE_FALSE;
-			*fstr = ch_strdup( "(unrecogized=*)" );
-			ch_free( type.bv_val );
+			Debug( LDAP_DEBUG_ANY, 
+				"get_filter: conn %d unknown attribute "
+				"type=%s (%d)\n",
+				op->o_connid, type.bv_val, err );
+
+			f.f_choice = SLAPD_FILTER_COMPUTED;
+			f.f_result = LDAP_COMPARE_FALSE;
 			err = LDAP_SUCCESS;
+			*text = NULL;
 			break;
 		}
 
-		ch_free( type.bv_val );
-
-		*fstr = ch_malloc( sizeof("(=*)")
-			+ f->f_desc->ad_cname->bv_len );
-		sprintf( *fstr, "(%s=*)",
-			f->f_desc->ad_cname->bv_val );
-
+		assert( f.f_desc != NULL );
 		} break;
 
 	case LDAP_FILTER_APPROX:
 		Debug( LDAP_DEBUG_FILTER, "APPROX\n", 0, 0, 0 );
-
-		err = get_ava( ber, &f->f_ava, SLAP_MR_EQUALITY_APPROX, text );
+		err = get_ava( op, ber, &f.f_ava, SLAP_MR_EQUALITY_APPROX, text );
 		if ( err != LDAP_SUCCESS ) {
 			break;
 		}
-
-		filter_escape_value( f->f_av_value, &escaped );
-
-		*fstr = ch_malloc( sizeof("(~=)")
-			+ f->f_av_desc->ad_cname->bv_len
-			+ escaped.bv_len );
-
-		sprintf( *fstr, "(%s~=%s)",
-			f->f_av_desc->ad_cname->bv_val,
-		    escaped.bv_val );
-
-		ber_memfree( escaped.bv_val );
+		assert( f.f_ava != NULL );
 		break;
 
 	case LDAP_FILTER_AND:
 		Debug( LDAP_DEBUG_FILTER, "AND\n", 0, 0, 0 );
-		err = get_filter_list( conn, ber, &f->f_and, &ftmp, text );
+		err = get_filter_list( op, ber, &f.f_and, text );
 		if ( err != LDAP_SUCCESS ) {
 			break;
 		}
-		*fstr = ch_malloc( sizeof("(&)")
-			+ ( ftmp == NULL ? 0 : strlen( ftmp ) ) );
-		sprintf( *fstr, "(&%s)",
-			ftmp == NULL ? "" : ftmp );
+		if ( f.f_and == NULL ) {
+			f.f_choice = SLAPD_FILTER_COMPUTED;
+			f.f_result = LDAP_COMPARE_TRUE;
+		}
+		/* no assert - list could be empty */
 		break;
 
 	case LDAP_FILTER_OR:
 		Debug( LDAP_DEBUG_FILTER, "OR\n", 0, 0, 0 );
-		err = get_filter_list( conn, ber, &f->f_and, &ftmp, text );
+		err = get_filter_list( op, ber, &f.f_or, text );
 		if ( err != LDAP_SUCCESS ) {
 			break;
 		}
-		*fstr = ch_malloc( sizeof("(!)")
-			+ ( ftmp == NULL ? 0 : strlen( ftmp ) ) );
-		sprintf( *fstr, "(|%s)",
-			ftmp == NULL ? "" : ftmp );
+		if ( f.f_or == NULL ) {
+			f.f_choice = SLAPD_FILTER_COMPUTED;
+			f.f_result = LDAP_COMPARE_FALSE;
+		}
+		/* no assert - list could be empty */
 		break;
 
 	case LDAP_FILTER_NOT:
 		Debug( LDAP_DEBUG_FILTER, "NOT\n", 0, 0, 0 );
 		(void) ber_skip_tag( ber, &len );
-		err = get_filter( conn, ber, &f->f_not, &ftmp, text );
+		err = get_filter( op, ber, &f.f_not, text );
 		if ( err != LDAP_SUCCESS ) {
 			break;
 		}
-		*fstr = ch_malloc( sizeof("(!)")
-			+ ( ftmp == NULL ? 0 : strlen( ftmp ) ) );
-		sprintf( *fstr, "(!%s)",
-			ftmp == NULL ? "" : ftmp );
+
+		assert( f.f_not != NULL );
+		if ( f.f_not->f_choice == SLAPD_FILTER_COMPUTED ) {
+			int fresult = f.f_not->f_result;
+			f.f_choice = SLAPD_FILTER_COMPUTED;
+			op->o_tmpfree( f.f_not, op->o_tmpmemctx );
+			f.f_not = NULL;
+
+			switch( fresult ) {
+			case LDAP_COMPARE_TRUE:
+				f.f_result = LDAP_COMPARE_FALSE;
+				break;
+			case LDAP_COMPARE_FALSE:
+				f.f_result = LDAP_COMPARE_TRUE;
+				break;
+			default: ;
+				/* (!Undefined) is Undefined */
+			}
+		}
 		break;
 
 	case LDAP_FILTER_EXT:
-		/* not yet implemented */
-		Debug( LDAP_DEBUG_ANY, "extensible match not yet implemented.\n",
-		       0, 0, 0 );
-		(void) ber_skip_tag( ber, &len );
-		f->f_choice = SLAPD_FILTER_COMPUTED;
-		f->f_result = SLAPD_COMPARE_UNDEFINED;
-		*fstr = ch_strdup( "(extended)" );
+		Debug( LDAP_DEBUG_FILTER, "EXTENSIBLE\n", 0, 0, 0 );
+
+		err = get_mra( op, ber, &f.f_mra, text );
+		if ( err != LDAP_SUCCESS ) {
+			break;
+		}
+
+		assert( f.f_mra != NULL );
 		break;
 
 	default:
 		(void) ber_scanf( ber, "x" ); /* skip the element */
 		Debug( LDAP_DEBUG_ANY, "get_filter: unknown filter type=%lu\n",
-		       f->f_choice, 0, 0 );
-		f->f_choice = SLAPD_FILTER_COMPUTED;
-		f->f_result = SLAPD_COMPARE_UNDEFINED;
-		*fstr = ch_strdup( "(undefined)" );
+			f.f_choice, 0, 0 );
+		f.f_choice = SLAPD_FILTER_COMPUTED;
+		f.f_result = SLAPD_COMPARE_UNDEFINED;
 		break;
 	}
 
-	free( ftmp );
-
-	if ( err != LDAP_SUCCESS ) {
-		if ( *fstr != NULL ) {
-			free( *fstr );
-		}
-
-		if( err != SLAPD_DISCONNECT ) {
-			/* ignore error */
-			f->f_choice = SLAPD_FILTER_COMPUTED;
-			f->f_result = SLAPD_COMPARE_UNDEFINED;
-			*fstr = ch_strdup( "(badfilter)" );
-			err = LDAP_SUCCESS;
-			*filt = f;
+	if( err != LDAP_SUCCESS && err != SLAPD_DISCONNECT ) {
+		/* ignore error */
+		*text = NULL;
+		f.f_choice = SLAPD_FILTER_COMPUTED;
+		f.f_result = SLAPD_COMPARE_UNDEFINED;
+		err = LDAP_SUCCESS;
+	}
 
-		} else {
-			free(f);
-		}
-	} else {
-		*filt = f;
+	if ( err == LDAP_SUCCESS ) {
+		*filt = op->o_tmpalloc( sizeof(f), op->o_tmpmemctx );
+		**filt = f;
 	}
 
 	Debug( LDAP_DEBUG_FILTER, "end get_filter %d\n", err, 0, 0 );
+
 	return( err );
 }
 
 static int
-get_filter_list( Connection *conn, BerElement *ber,
-	Filter **f, char **fstr,
+get_filter_list( Operation *op, BerElement *ber,
+	Filter **f,
 	const char **text )
 {
 	Filter		**new;
 	int		err;
 	ber_tag_t	tag;
 	ber_len_t	len;
-	char		*last, *ftmp;
+	char		*last;
 
 	Debug( LDAP_DEBUG_FILTER, "begin get_filter_list\n", 0, 0, 0 );
-
-	*fstr = NULL;
 	new = f;
-	for ( tag = ber_first_element( ber, &len, &last ); tag != LBER_DEFAULT;
-	    tag = ber_next_element( ber, &len, last ) )
+	for ( tag = ber_first_element( ber, &len, &last );
+		tag != LBER_DEFAULT;
+		tag = ber_next_element( ber, &len, last ) )
 	{
-		err = get_filter( conn, ber, new, &ftmp, text );
+		err = get_filter( op, ber, new, text );
 		if ( err != LDAP_SUCCESS )
 			return( err );
-
-		if ( *fstr == NULL ) {
-			*fstr = ftmp;
-		} else {
-			*fstr = ch_realloc( *fstr, strlen( *fstr ) +
-			    strlen( ftmp ) + 1 );
-			strcat( *fstr, ftmp );
-			free( ftmp );
-		}
 		new = &(*new)->f_next;
 	}
 	*new = NULL;
@@ -344,68 +317,65 @@ get_filter_list( Connection *conn, BerEl
 }
 
 static int
-get_substring_filter(
-    Connection	*conn,
-    BerElement	*ber,
-    Filter	*f,
-    char	**fstr,
-	const char	**text
-)
+get_ssa(
+	Operation *op,
+	BerElement	*ber,
+	SubstringsAssertion	**out,
+	const char	**text )
 {
 	ber_tag_t	tag;
 	ber_len_t	len;
 	ber_tag_t	rc;
-	struct berval *value;
-	struct berval escaped;
+	struct berval desc, value, nvalue;
 	char		*last;
-	struct berval type;
-	struct berval *nvalue;
-	*text = "error decoding filter";
+	SubstringsAssertion ssa;
 
-	Debug( LDAP_DEBUG_FILTER, "begin get_substring_filter\n", 0, 0, 0 );
+	*text = "error decoding filter";
+	*out = NULL;
 
-	if ( ber_scanf( ber, "{o" /*}*/, &type ) == LBER_ERROR ) {
+	Debug( LDAP_DEBUG_FILTER, "begin get_ssa\n", 0, 0, 0 );
+	if ( ber_scanf( ber, "{m" /*}*/, &desc ) == LBER_ERROR ) {
 		return SLAPD_DISCONNECT;
 	}
 
-	f->f_sub = ch_calloc( 1, sizeof(SubstringsAssertion) );
-	f->f_sub_desc = NULL;
-	rc = slap_bv2ad( &type, &f->f_sub_desc, text );
+	*text = NULL;
+
+	ssa.sa_desc = NULL;
+	ssa.sa_initial.bv_val = NULL;
+	ssa.sa_any = NULL;
+	ssa.sa_final.bv_val = NULL;
 
-	ch_free( type.bv_val );
+	rc = slap_bv2ad( &desc, &ssa.sa_desc, text );
 
 	if( rc != LDAP_SUCCESS ) {
-		text = NULL;
-		ch_free( f->f_sub );
-		f->f_choice = SLAPD_FILTER_COMPUTED;
-		f->f_result = SLAPD_COMPARE_UNDEFINED;
-		*fstr = ch_strdup( "(undefined)" );
-		return LDAP_SUCCESS;
-	}
-
-	f->f_sub_initial = NULL;
-	f->f_sub_any = NULL;
-	f->f_sub_final = NULL;
-
-	if( fstr ) {
-		*fstr = ch_malloc( sizeof("(=" /*)*/) +
-			f->f_sub_desc->ad_cname->bv_len );
-		sprintf( *fstr, "(%s=" /*)*/, f->f_sub_desc->ad_cname->bv_val );
+		Debug( LDAP_DEBUG_ANY, 
+			"get_ssa: conn %d unknown attribute type=%s (%d)\n",
+			op->o_connid, desc.bv_val, rc );
+
+		/* skip over the rest of this filter */
+		for ( tag = ber_first_element( ber, &len, &last );
+			tag != LBER_DEFAULT;
+			tag = ber_next_element( ber, &len, last ) ) {
+			ber_scanf( ber, "x" );
+		}
+		return rc;
 	}
 
-	for ( tag = ber_first_element( ber, &len, &last ); tag != LBER_DEFAULT;
-	    tag = ber_next_element( ber, &len, last ) )
+	rc = LDAP_PROTOCOL_ERROR;
+
+	for ( tag = ber_first_element( ber, &len, &last );
+		tag != LBER_DEFAULT;
+		tag = ber_next_element( ber, &len, last ) )
 	{
 		unsigned usage;
 
-		rc = ber_scanf( ber, "O", &value );
+		rc = ber_scanf( ber, "m", &value );
 		if ( rc == LBER_ERROR ) {
 			rc = SLAPD_DISCONNECT;
 			goto return_error;
 		}
 
-		if ( value == NULL || value->bv_len == 0 ) {
-			ber_bvfree( value );
+		if ( value.bv_val == NULL || value.bv_len == 0 ) {
 			rc = LDAP_INVALID_SYNTAX;
 			goto return_error;
 		} 
@@ -430,84 +400,55 @@ get_substring_filter(
 				"  unknown substring choice=%ld\n",
 				(long) tag, 0, 0 );
 
-			ber_bvfree( value );
 			goto return_error;
 		}
 
-		rc = value_normalize( f->f_sub_desc, usage, value, &nvalue, text );
-		ber_bvfree( value );
+		/* validate/normalize using equality matching rule validator! */
+		rc = asserted_value_validate_normalize(
+			ssa.sa_desc, ssa.sa_desc->ad_type->sat_equality,
+			usage, &value, &nvalue, text, op->o_tmpmemctx );
 
 		if( rc != LDAP_SUCCESS ) {
 			goto return_error;
 		}
 
-		value = nvalue;
-
 		rc = LDAP_PROTOCOL_ERROR;
 
 		switch ( tag ) {
 		case LDAP_SUBSTRING_INITIAL:
 			Debug( LDAP_DEBUG_FILTER, "  INITIAL\n", 0, 0, 0 );
-			if ( f->f_sub_initial != NULL
-				|| f->f_sub_any != NULL 
-				|| f->f_sub_final != NULL )
+
+			if ( ssa.sa_initial.bv_val != NULL
+				|| ssa.sa_any != NULL 
+				|| ssa.sa_final.bv_val != NULL )
 			{
-				ber_bvfree( value );
+				slap_sl_free( nvalue.bv_val, op->o_tmpmemctx );
 				goto return_error;
 			}
 
-			f->f_sub_initial = value;
-
-			if( fstr ) {
-				filter_escape_value( value, &escaped );
-				*fstr = ch_realloc( *fstr,
-					strlen( *fstr ) + escaped.bv_len + 1 );
-				strcat( *fstr, escaped.bv_val );
-				ber_memfree( escaped.bv_val );
-			}
+			ssa.sa_initial = nvalue;
 			break;
 
 		case LDAP_SUBSTRING_ANY:
 			Debug( LDAP_DEBUG_FILTER, "  ANY\n", 0, 0, 0 );
 
-			if ( f->f_sub_final != NULL ) {
-				ber_bvfree( value );
+			if ( ssa.sa_final.bv_val != NULL ) {
+				slap_sl_free( nvalue.bv_val, op->o_tmpmemctx );
 				goto return_error;
 			}
 
-			if( ber_bvecadd( &f->f_sub_any, value ) < 0 ) {
-				ber_bvfree( value );
-				goto return_error;
-			}
-
-			if( fstr ) {
-				filter_escape_value( value, &escaped );
-				*fstr = ch_realloc( *fstr,
-					strlen( *fstr ) + escaped.bv_len + 2 );
-				strcat( *fstr, "*" );
-				strcat( *fstr, escaped.bv_val );
-				ber_memfree( escaped.bv_val );
-			}
+			ber_bvarray_add_x( &ssa.sa_any, &nvalue, op->o_tmpmemctx );
 			break;
 
 		case LDAP_SUBSTRING_FINAL:
 			Debug( LDAP_DEBUG_FILTER, "  FINAL\n", 0, 0, 0 );
 
-			if ( f->f_sub_final != NULL ) {
-				ber_bvfree( value );
+			if ( ssa.sa_final.bv_val != NULL ) {
+				slap_sl_free( nvalue.bv_val, op->o_tmpmemctx );
 				goto return_error;
 			}
 
-			f->f_sub_final = value;
-
-			if( fstr ) {
-				filter_escape_value( value, &escaped );
-				*fstr = ch_realloc( *fstr,
-					strlen( *fstr ) + escaped.bv_len + 2 );
-				strcat( *fstr, "*" );
-				strcat( *fstr, escaped.bv_val );
-				ber_memfree( escaped.bv_val );
-			}
+			ssa.sa_final = nvalue;
 			break;
 
 		default:
@@ -515,40 +456,33 @@ get_substring_filter(
 				"  unknown substring type=%ld\n",
 				(long) tag, 0, 0 );
 
-			ber_bvfree( value );
+			assert( 0 );
+			slap_sl_free( nvalue.bv_val, op->o_tmpmemctx );
 
 return_error:
 			Debug( LDAP_DEBUG_FILTER, "  error=%ld\n",
 				(long) rc, 0, 0 );
-
-			if( fstr ) {
-				free( *fstr );
-				*fstr = NULL;
-			}
-
-			ad_free( f->f_sub_desc, 1 );
-			ber_bvfree( f->f_sub_initial );
-			ber_bvecfree( f->f_sub_any );
-			ber_bvfree( f->f_sub_final );
-			ch_free( f->f_sub );
+			slap_sl_free( ssa.sa_initial.bv_val, op->o_tmpmemctx );
+			ber_bvarray_free_x( ssa.sa_any, op->o_tmpmemctx );
+			slap_sl_free( ssa.sa_final.bv_val, op->o_tmpmemctx );
 			return rc;
 		}
+
+		rc = LDAP_SUCCESS;
 	}
 
-	if( fstr ) {
-		*fstr = ch_realloc( *fstr, strlen( *fstr ) + 3 );
-		if ( f->f_sub_final == NULL ) {
-			strcat( *fstr, "*" );
-		}
-		strcat( *fstr, /*(*/ ")" );
+	if( rc == LDAP_SUCCESS ) {
+		*out = op->o_tmpalloc( sizeof( ssa ), op->o_tmpmemctx );
+		**out = ssa;
 	}
 
-	Debug( LDAP_DEBUG_FILTER, "end get_substring_filter\n", 0, 0, 0 );
-	return( LDAP_SUCCESS );
+	Debug( LDAP_DEBUG_FILTER, "end get_ssa\n", 0, 0, 0 );
+
+	return rc /* LDAP_SUCCESS */ ;
 }
 
 void
-filter_free( Filter *f )
+filter_free_x( Operation *op, Filter *f )
 {
 	Filter	*p, *next;
 
@@ -558,26 +492,24 @@ filter_free( Filter *f )
 
 	switch ( f->f_choice ) {
 	case LDAP_FILTER_PRESENT:
-		ad_free( f->f_desc, 1 );
 		break;
 
 	case LDAP_FILTER_EQUALITY:
 	case LDAP_FILTER_GE:
 	case LDAP_FILTER_LE:
 	case LDAP_FILTER_APPROX:
-		ava_free( f->f_ava, 1 );
+		ava_free( op, f->f_ava, 1 );
 		break;
 
 	case LDAP_FILTER_SUBSTRINGS:
-		ad_free( f->f_sub_desc, 1 );
-		if ( f->f_sub_initial != NULL ) {
-			ber_bvfree( f->f_sub_initial );
-		}
-		ber_bvecfree( f->f_sub_any );
-		if ( f->f_sub_final != NULL ) {
-			ber_bvfree( f->f_sub_final );
+		if ( f->f_sub_initial.bv_val != NULL ) {
+			op->o_tmpfree( f->f_sub_initial.bv_val, op->o_tmpmemctx );
+		}
+		ber_bvarray_free_x( f->f_sub_any, op->o_tmpmemctx );
+		if ( f->f_sub_final.bv_val != NULL ) {
+			op->o_tmpfree( f->f_sub_final.bv_val, op->o_tmpmemctx );
 		}
-		ch_free( f->f_sub );
+		op->o_tmpfree( f->f_sub, op->o_tmpmemctx );
 		break;
 
 	case LDAP_FILTER_AND:
@@ -585,135 +517,283 @@ filter_free( Filter *f )
 	case LDAP_FILTER_NOT:
 		for ( p = f->f_list; p != NULL; p = next ) {
 			next = p->f_next;
-			filter_free( p );
+			filter_free_x( op, p );
 		}
 		break;
 
+	case LDAP_FILTER_EXT:
+		mra_free( op, f->f_mra, 1 );
+		break;
+
 	case SLAPD_FILTER_COMPUTED:
 		break;
 
 	default:
 		Debug( LDAP_DEBUG_ANY, "filter_free: unknown filter type=%lu\n",
-		       f->f_choice, 0, 0 );
+			f->f_choice, 0, 0 );
 		break;
 	}
 
-	free( f );
+	op->o_tmpfree( f, op->o_tmpmemctx );
+}
+
+void
+filter_free( Filter *f )
+{
+	Operation op;
+
+	op.o_tmpmemctx = slap_sl_context( f );
+	op.o_tmpmfuncs = &slap_sl_mfuncs;
+	filter_free_x( &op, f );
 }
 
-#ifdef LDAP_DEBUG
 void
-filter_print( Filter *f )
+filter2bv_x( Operation *op, Filter *f, struct berval *fstr )
 {
-	int	i;
-	Filter	*p;
-	struct berval escaped;
+	int		i;
+	Filter		*p;
+	struct berval	tmp;
+	static struct berval
+			ber_bvfalse = BER_BVC( "(?=false)" ),
+			ber_bvtrue = BER_BVC( "(?=true)" ),
+			ber_bvundefined = BER_BVC( "(?=undefined)" ),
+			ber_bverror = BER_BVC( "(?=error)" ),
+			ber_bvunknown = BER_BVC( "(?=unknown)" ),
+			ber_bvnone = BER_BVC( "(?=none)" );
+	ber_len_t	len;
 
 	if ( f == NULL ) {
-		fprintf( stderr, "No filter!" );
+		ber_dupbv_x( fstr, &ber_bvnone, op->o_tmpmemctx );
+		return;
 	}
 
 	switch ( f->f_choice ) {
 	case LDAP_FILTER_EQUALITY:
-		filter_escape_value( f->f_av_value, &escaped );
-		fprintf( stderr, "(%s=%s)",
-			f->f_av_desc->ad_cname->bv_val,
-		    escaped.bv_val );
-		ber_memfree( escaped.bv_val );
+		filter_escape_value_x( &f->f_av_value, &tmp, op->o_tmpmemctx );
+
+		fstr->bv_len = f->f_av_desc->ad_cname.bv_len +
+			tmp.bv_len + ( sizeof("(=)") - 1 );
+		fstr->bv_val = op->o_tmpalloc( fstr->bv_len + 1, op->o_tmpmemctx );
+
+		snprintf( fstr->bv_val, fstr->bv_len + 1, "(%s=%s)",
+			f->f_av_desc->ad_cname.bv_val,
+			tmp.bv_val );
+
+		ber_memfree_x( tmp.bv_val, op->o_tmpmemctx );
 		break;
 
 	case LDAP_FILTER_GE:
-		filter_escape_value( f->f_av_value, &escaped );
-		fprintf( stderr, "(%s>=%s)",
-			f->f_av_desc->ad_cname->bv_val,
-		    escaped.bv_val );
-		ber_memfree( escaped.bv_val );
+		filter_escape_value_x( &f->f_av_value, &tmp, op->o_tmpmemctx );
+
+		fstr->bv_len = f->f_av_desc->ad_cname.bv_len +
+			tmp.bv_len + ( sizeof("(>=)") - 1 );
+		fstr->bv_val = op->o_tmpalloc( fstr->bv_len + 1, op->o_tmpmemctx );
+
+		snprintf( fstr->bv_val, fstr->bv_len + 1, "(%s>=%s)",
+			f->f_av_desc->ad_cname.bv_val,
+			tmp.bv_val );
+
+		ber_memfree_x( tmp.bv_val, op->o_tmpmemctx );
 		break;
 
 	case LDAP_FILTER_LE:
-		filter_escape_value( f->f_av_value, &escaped );
-		fprintf( stderr, "(%s<=%s)",
-			f->f_ava->aa_desc->ad_cname->bv_val,
-		    escaped.bv_val );
-		ber_memfree( escaped.bv_val );
+		filter_escape_value_x( &f->f_av_value, &tmp, op->o_tmpmemctx );
+
+		fstr->bv_len = f->f_av_desc->ad_cname.bv_len +
+			tmp.bv_len + ( sizeof("(<=)") - 1 );
+		fstr->bv_val = op->o_tmpalloc( fstr->bv_len + 1, op->o_tmpmemctx );
+
+		snprintf( fstr->bv_val, fstr->bv_len + 1, "(%s<=%s)",
+			f->f_av_desc->ad_cname.bv_val,
+			tmp.bv_val );
+
+		ber_memfree_x( tmp.bv_val, op->o_tmpmemctx );
 		break;
 
 	case LDAP_FILTER_APPROX:
-		filter_escape_value( f->f_av_value, &escaped );
-		fprintf( stderr, "(%s~=%s)",
-			f->f_ava->aa_desc->ad_cname->bv_val,
-		    escaped.bv_val );
-		ber_memfree( escaped.bv_val );
+		filter_escape_value_x( &f->f_av_value, &tmp, op->o_tmpmemctx );
+
+		fstr->bv_len = f->f_av_desc->ad_cname.bv_len +
+			tmp.bv_len + ( sizeof("(~=)") - 1 );
+		fstr->bv_val = op->o_tmpalloc( fstr->bv_len + 1, op->o_tmpmemctx );
+
+		snprintf( fstr->bv_val, fstr->bv_len + 1, "(%s~=%s)",
+			f->f_av_desc->ad_cname.bv_val,
+			tmp.bv_val );
+		ber_memfree_x( tmp.bv_val, op->o_tmpmemctx );
 		break;
 
 	case LDAP_FILTER_SUBSTRINGS:
-		fprintf( stderr, "(%s=" /*)*/,
-			f->f_sub_desc->ad_cname->bv_val );
-		if ( f->f_sub_initial != NULL ) {
-			filter_escape_value( f->f_sub_initial, &escaped );
-			fprintf( stderr, "%s",
-				escaped.bv_val );
-			ber_memfree( escaped.bv_val );
+		fstr->bv_len = f->f_sub_desc->ad_cname.bv_len +
+			( sizeof("(=*)") - 1 );
+		fstr->bv_val = op->o_tmpalloc( fstr->bv_len + 128, op->o_tmpmemctx );
+
+		snprintf( fstr->bv_val, fstr->bv_len + 1, "(%s=*)",
+			f->f_sub_desc->ad_cname.bv_val );
+
+		if ( f->f_sub_initial.bv_val != NULL ) {
+			len = fstr->bv_len;
+
+			filter_escape_value_x( &f->f_sub_initial, &tmp, op->o_tmpmemctx );
+
+			fstr->bv_len += tmp.bv_len;
+			fstr->bv_val = op->o_tmprealloc( fstr->bv_val, fstr->bv_len + 1,
+				op->o_tmpmemctx );
+
+			snprintf( &fstr->bv_val[len-2], tmp.bv_len+3,
+				/* "(attr=" */ "%s*)",
+				tmp.bv_val );
+
+			ber_memfree_x( tmp.bv_val, op->o_tmpmemctx );
 		}
+
 		if ( f->f_sub_any != NULL ) {
-			for ( i = 0; f->f_sub_any[i] != NULL; i++ ) {
-				filter_escape_value( f->f_sub_any[i], &escaped );
-				fprintf( stderr, "*%s",
-					escaped.bv_val );
-				ber_memfree( escaped.bv_val );
+			for ( i = 0; f->f_sub_any[i].bv_val != NULL; i++ ) {
+				len = fstr->bv_len;
+				filter_escape_value_x( &f->f_sub_any[i],
+					&tmp, op->o_tmpmemctx );
+
+				fstr->bv_len += tmp.bv_len + 1;
+				fstr->bv_val = op->o_tmprealloc( fstr->bv_val, fstr->bv_len + 1,
+					op->o_tmpmemctx );
+
+				snprintf( &fstr->bv_val[len-1], tmp.bv_len+3,
+					/* "(attr=[init]*[any*]" */ "%s*)",
+					tmp.bv_val );
+				ber_memfree_x( tmp.bv_val, op->o_tmpmemctx );
 			}
 		}
-		if ( f->f_sub_final != NULL ) {
-			filter_escape_value( f->f_sub_final, &escaped );
-			fprintf( stderr,
-				"*%s", escaped.bv_val );
-			ber_memfree( escaped.bv_val );
+
+		if ( f->f_sub_final.bv_val != NULL ) {
+			len = fstr->bv_len;
+
+			filter_escape_value_x( &f->f_sub_final, &tmp, op->o_tmpmemctx );
+
+			fstr->bv_len += tmp.bv_len;
+			fstr->bv_val = op->o_tmprealloc( fstr->bv_val, fstr->bv_len + 1,
+				op->o_tmpmemctx );
+
+			snprintf( &fstr->bv_val[len-1], tmp.bv_len+3,
+				/* "(attr=[init*][any*]" */ "%s)",
+				tmp.bv_val );
+
+			ber_memfree_x( tmp.bv_val, op->o_tmpmemctx );
 		}
-		fprintf( stderr, /*(*/ ")" );
+
 		break;
 
 	case LDAP_FILTER_PRESENT:
-		fprintf( stderr, "(%s=*)",
-			f->f_desc->ad_cname->bv_val );
+		fstr->bv_len = f->f_desc->ad_cname.bv_len +
+			( sizeof("(=*)") - 1 );
+		fstr->bv_val = op->o_tmpalloc( fstr->bv_len + 1, op->o_tmpmemctx );
+
+		snprintf( fstr->bv_val, fstr->bv_len + 1, "(%s=*)",
+			f->f_desc->ad_cname.bv_val );
 		break;
 
 	case LDAP_FILTER_AND:
 	case LDAP_FILTER_OR:
 	case LDAP_FILTER_NOT:
-		fprintf( stderr, "(%c" /*)*/,
+		fstr->bv_len = sizeof("(%)") - 1;
+		fstr->bv_val = op->o_tmpalloc( fstr->bv_len + 128, op->o_tmpmemctx );
+
+		snprintf( fstr->bv_val, fstr->bv_len + 1, "(%c)",
 			f->f_choice == LDAP_FILTER_AND ? '&' :
-		    f->f_choice == LDAP_FILTER_OR ? '|' : '!' );
+			f->f_choice == LDAP_FILTER_OR ? '|' : '!' );
+
 		for ( p = f->f_list; p != NULL; p = p->f_next ) {
-			filter_print( p );
+			len = fstr->bv_len;
+
+			filter2bv_x( op, p, &tmp );
+			
+			fstr->bv_len += tmp.bv_len;
+			fstr->bv_val = op->o_tmprealloc( fstr->bv_val, fstr->bv_len + 1,
+				op->o_tmpmemctx );
+
+			snprintf( &fstr->bv_val[len-1], tmp.bv_len + 2, 
+				/*"("*/ "%s)", tmp.bv_val );
+
+			op->o_tmpfree( tmp.bv_val, op->o_tmpmemctx );
 		}
-		fprintf( stderr, /*(*/ ")" );
+
 		break;
 
+	case LDAP_FILTER_EXT: {
+			struct berval ad;
+			filter_escape_value_x( &f->f_mr_value, &tmp, op->o_tmpmemctx );
+
+			if ( f->f_mr_desc ) {
+				ad = f->f_mr_desc->ad_cname;
+			} else {
+				ad.bv_len = 0;
+				ad.bv_val = "";
+			}
+			
+			fstr->bv_len = ad.bv_len +
+				( f->f_mr_dnattrs ? sizeof(":dn")-1 : 0 ) +
+				( f->f_mr_rule_text.bv_len ? f->f_mr_rule_text.bv_len+1 : 0 ) +
+				tmp.bv_len + ( sizeof("(:=)") - 1 );
+			fstr->bv_val = op->o_tmpalloc( fstr->bv_len + 1, op->o_tmpmemctx );
+
+			snprintf( fstr->bv_val, fstr->bv_len + 1, "(%s%s%s%s:=%s)",
+				ad.bv_val,
+				f->f_mr_dnattrs ? ":dn" : "",
+				f->f_mr_rule_text.bv_len ? ":" : "",
+				f->f_mr_rule_text.bv_len ? f->f_mr_rule_text.bv_val : "",
+				tmp.bv_val );
+			ber_memfree_x( tmp.bv_val, op->o_tmpmemctx );
+		} break;
+
 	case SLAPD_FILTER_COMPUTED:
-		fprintf( stderr, "(?=%s)",
-			f->f_result == LDAP_COMPARE_FALSE ? "false" :
-			f->f_result == LDAP_COMPARE_TRUE ? "true" :
-			f->f_result == SLAPD_COMPARE_UNDEFINED ? "undefined" :
-			"error" );
-		break;
+		switch ( f->f_result ) {
+		case LDAP_COMPARE_FALSE:
+			tmp = ber_bvfalse;
+			break;
+
+		case LDAP_COMPARE_TRUE:
+			tmp = ber_bvtrue;
+			break;
+			
+		case SLAPD_COMPARE_UNDEFINED:
+			tmp = ber_bvundefined;
+			break;
+			
+		default:
+			tmp = ber_bverror;
+			break;
+		}
 
+		ber_dupbv_x( fstr, &tmp, op->o_tmpmemctx );
+		break;
+		
 	default:
-		fprintf( stderr, "(unknown-filter=%lu)", f->f_choice );
+		ber_dupbv_x( fstr, &ber_bvunknown, op->o_tmpmemctx );
 		break;
 	}
 }
 
-#endif /* ldap_debug */
+void
+filter2bv( Filter *f, struct berval *fstr )
+{
+	Operation op;
+	op.o_tmpmemctx = NULL;
+	op.o_tmpmfuncs = &ch_mfuncs;
 
-int filter_escape_value(
+	filter2bv_x( &op, f, fstr );
+}
+
+static int
+filter_escape_value_x(
 	struct berval *in,
-	struct berval *out )
+	struct berval *out,
+	void *ctx )
 {
 	ber_len_t i;
 	assert( in );
 	assert( out );
 
-	out->bv_val = (char *) ch_malloc( ( in->bv_len * 3 ) + 1 );
+	i = in->bv_len * 3 + 1;
+	out->bv_val = ctx ? slap_sl_malloc( i, ctx ) : ch_malloc( i );
 	out->bv_len = 0;
 
 	for( i=0; i < in->bv_len ; i++ ) {
@@ -729,3 +809,481 @@ int filter_escape_value(
 	out->bv_val[out->bv_len] = '\0';
 	return LDAP_SUCCESS;
 }
+
+int
+filter_escape_value(
+	struct berval *in,
+	struct berval *out )
+{
+	return filter_escape_value_x( in, out, NULL );
+}
+
+static int
+get_simple_vrFilter(
+	Operation *op,
+	BerElement *ber,
+	ValuesReturnFilter **filt,
+	const char **text )
+{
+	ber_tag_t	tag;
+	ber_len_t	len;
+	int		err;
+	ValuesReturnFilter vrf;
+
+	Debug( LDAP_DEBUG_FILTER, "begin get_simple_vrFilter\n", 0, 0, 0 );
+
+	tag = ber_peek_tag( ber, &len );
+
+	if( tag == LBER_ERROR ) {
+		*text = "error decoding filter";
+		return SLAPD_DISCONNECT;
+	}
+
+	vrf.vrf_next = NULL;
+
+	err = LDAP_SUCCESS;
+	vrf.vrf_choice = tag; 
+
+	switch ( vrf.vrf_choice ) {
+	case LDAP_FILTER_EQUALITY:
+		Debug( LDAP_DEBUG_FILTER, "EQUALITY\n", 0, 0, 0 );
+		err = get_ava( op, ber, &vrf.vrf_ava, SLAP_MR_EQUALITY, text );
+		if ( err != LDAP_SUCCESS ) {
+			break;
+		}
+
+		assert( vrf.vrf_ava != NULL );
+		break;
+
+	case LDAP_FILTER_SUBSTRINGS:
+		Debug( LDAP_DEBUG_FILTER, "SUBSTRINGS\n", 0, 0, 0 );
+		err = get_ssa( op, ber, &vrf.vrf_sub, text );
+		break;
+
+	case LDAP_FILTER_GE:
+		Debug( LDAP_DEBUG_FILTER, "GE\n", 0, 0, 0 );
+		err = get_ava( op, ber, &vrf.vrf_ava, SLAP_MR_ORDERING, text );
+		if ( err != LDAP_SUCCESS ) {
+			break;
+		}
+		break;
+
+	case LDAP_FILTER_LE:
+		Debug( LDAP_DEBUG_FILTER, "LE\n", 0, 0, 0 );
+		err = get_ava( op, ber, &vrf.vrf_ava, SLAP_MR_ORDERING, text );
+		if ( err != LDAP_SUCCESS ) {
+			break;
+		}
+		break;
+
+	case LDAP_FILTER_PRESENT: {
+		struct berval type;
+
+		Debug( LDAP_DEBUG_FILTER, "PRESENT\n", 0, 0, 0 );
+		if ( ber_scanf( ber, "m", &type ) == LBER_ERROR ) {
+			err = SLAPD_DISCONNECT;
+			*text = "error decoding filter";
+			break;
+		}
+
+		vrf.vrf_desc = NULL;
+		err = slap_bv2ad( &type, &vrf.vrf_desc, text );
+
+		if( err != LDAP_SUCCESS ) {
+			/* unrecognized attribute description or other error */
+			Debug( LDAP_DEBUG_ANY, 
+				"get_simple_vrFilter: conn %d unknown "
+				"attribute type=%s (%d)\n",
+				op->o_connid, type.bv_val, err );
+
+			vrf.vrf_choice = SLAPD_FILTER_COMPUTED;
+			vrf.vrf_result = LDAP_COMPARE_FALSE;
+			err = LDAP_SUCCESS;
+			break;
+		}
+		} break;
+
+	case LDAP_FILTER_APPROX:
+		Debug( LDAP_DEBUG_FILTER, "APPROX\n", 0, 0, 0 );
+		err = get_ava( op, ber, &vrf.vrf_ava, SLAP_MR_EQUALITY_APPROX, text );
+		if ( err != LDAP_SUCCESS ) {
+			break;
+		}
+		break;
+
+	case LDAP_FILTER_EXT:
+		Debug( LDAP_DEBUG_FILTER, "EXTENSIBLE\n", 0, 0, 0 );
+
+		err = get_mra( op, ber, &vrf.vrf_mra, text );
+		if ( err != LDAP_SUCCESS ) {
+			break;
+		}
+
+		assert( vrf.vrf_mra != NULL );
+		break;
+
+	default:
+		(void) ber_scanf( ber, "x" ); /* skip the element */
+		Debug( LDAP_DEBUG_ANY, "get_simple_vrFilter: unknown filter type=%lu\n",
+			vrf.vrf_choice, 0, 0 );
+		vrf.vrf_choice = SLAPD_FILTER_COMPUTED;
+		vrf.vrf_result = SLAPD_COMPARE_UNDEFINED;
+		break;
+	}
+
+	if ( err != LDAP_SUCCESS && err != SLAPD_DISCONNECT ) {
+		/* ignore error */
+		vrf.vrf_choice = SLAPD_FILTER_COMPUTED;
+		vrf.vrf_result = SLAPD_COMPARE_UNDEFINED;
+		err = LDAP_SUCCESS;
+	}
+
+	if ( err == LDAP_SUCCESS ) {
+		*filt = ch_malloc( sizeof vrf );
+		**filt = vrf;
+	}
+
+	Debug( LDAP_DEBUG_FILTER, "end get_simple_vrFilter %d\n", err, 0, 0 );
+
+	return err;
+}
+
+int
+get_vrFilter( Operation *op, BerElement *ber,
+	ValuesReturnFilter **vrf,
+	const char **text )
+{
+	/*
+	 * A ValuesReturnFilter looks like this:
+	 *
+	 *	ValuesReturnFilter ::= SEQUENCE OF SimpleFilterItem
+	 *      SimpleFilterItem ::= CHOICE {
+	 *              equalityMatch   [3]     AttributeValueAssertion,
+	 *              substrings      [4]     SubstringFilter,
+	 *              greaterOrEqual  [5]     AttributeValueAssertion,
+	 *              lessOrEqual     [6]     AttributeValueAssertion,
+	 *              present         [7]     AttributeType,
+	 *              approxMatch     [8]     AttributeValueAssertion,
+	 *		extensibleMatch [9]	SimpleMatchingAssertion -- LDAPv3
+	 *      }
+	 *
+	 *      SubstringFilter ::= SEQUENCE {
+	 *              type               AttributeType,
+	 *              SEQUENCE OF CHOICE {
+	 *                      initial          [0] IA5String,
+	 *                      any              [1] IA5String,
+	 *                      final            [2] IA5String
+	 *              }
+	 *      }
+	 *
+	 *	SimpleMatchingAssertion ::= SEQUENCE {	-- LDAPv3
+	 *		matchingRule    [1] MatchingRuleId OPTIONAL,
+	 *		type            [2] AttributeDescription OPTIONAL,
+	 *		matchValue      [3] AssertionValue }
+	 */
+
+	ValuesReturnFilter **n;
+	ber_tag_t	tag;
+	ber_len_t	len;
+	char		*last;
+
+	Debug( LDAP_DEBUG_FILTER, "begin get_vrFilter\n", 0, 0, 0 );
+
+	tag = ber_peek_tag( ber, &len );
+
+	if( tag == LBER_ERROR ) {
+		*text = "error decoding vrFilter";
+		return SLAPD_DISCONNECT;
+	}
+
+	if( tag != LBER_SEQUENCE ) {
+		*text = "error decoding vrFilter, expect SEQUENCE tag";
+		return SLAPD_DISCONNECT;
+	}
+
+	n = vrf;
+	for ( tag = ber_first_element( ber, &len, &last );
+		tag != LBER_DEFAULT;
+		tag = ber_next_element( ber, &len, last ) )
+	{
+		int err = get_simple_vrFilter( op, ber, n, text );
+
+		if ( err != LDAP_SUCCESS ) return( err );
+
+		n = &(*n)->vrf_next;
+	}
+	*n = NULL;
+
+	Debug( LDAP_DEBUG_FILTER, "end get_vrFilter\n", 0, 0, 0 );
+	return( LDAP_SUCCESS );
+}
+
+void
+vrFilter_free( Operation *op, ValuesReturnFilter *vrf )
+{
+	ValuesReturnFilter	*p, *next;
+
+	if ( vrf == NULL ) {
+		return;
+	}
+
+	for ( p = vrf; p != NULL; p = next ) {
+		next = p->vrf_next;
+
+		switch ( vrf->vrf_choice ) {
+		case LDAP_FILTER_PRESENT:
+			break;
+
+		case LDAP_FILTER_EQUALITY:
+		case LDAP_FILTER_GE:
+		case LDAP_FILTER_LE:
+		case LDAP_FILTER_APPROX:
+			ava_free( op, vrf->vrf_ava, 1 );
+			break;
+
+		case LDAP_FILTER_SUBSTRINGS:
+			if ( vrf->vrf_sub_initial.bv_val != NULL ) {
+				op->o_tmpfree( vrf->vrf_sub_initial.bv_val, op->o_tmpmemctx );
+			}
+			ber_bvarray_free_x( vrf->vrf_sub_any, op->o_tmpmemctx );
+			if ( vrf->vrf_sub_final.bv_val != NULL ) {
+				op->o_tmpfree( vrf->vrf_sub_final.bv_val, op->o_tmpmemctx );
+			}
+			op->o_tmpfree( vrf->vrf_sub, op->o_tmpmemctx );
+			break;
+
+		case LDAP_FILTER_EXT:
+			mra_free( op, vrf->vrf_mra, 1 );
+			break;
+
+		case SLAPD_FILTER_COMPUTED:
+			break;
+
+		default:
+			Debug( LDAP_DEBUG_ANY, "filter_free: unknown filter type=%lu\n",
+				vrf->vrf_choice, 0, 0 );
+			break;
+		}
+
+		op->o_tmpfree( vrf, op->o_tmpmemctx );
+	}
+}
+
+void
+vrFilter2bv( Operation *op, ValuesReturnFilter *vrf, struct berval *fstr )
+{
+	ValuesReturnFilter	*p;
+	struct berval tmp;
+	ber_len_t len;
+
+	if ( vrf == NULL ) {
+		ber_str2bv_x( "No filter!", sizeof("No filter!")-1,
+			1, fstr, op->o_tmpmemctx );
+		return;
+	}
+
+	fstr->bv_len = sizeof("()") - 1;
+	fstr->bv_val = op->o_tmpalloc( fstr->bv_len + 128, op->o_tmpmemctx );
+
+	snprintf( fstr->bv_val, fstr->bv_len + 1, "()");
+
+	for ( p = vrf; p != NULL; p = p->vrf_next ) {
+		len = fstr->bv_len;
+
+		simple_vrFilter2bv( op, p, &tmp );
+			
+		fstr->bv_len += tmp.bv_len;
+		fstr->bv_val = op->o_tmprealloc( fstr->bv_val, fstr->bv_len + 1,
+			op->o_tmpmemctx );
+
+		snprintf( &fstr->bv_val[len-1], tmp.bv_len + 2, 
+			/*"("*/ "%s)", tmp.bv_val );
+
+		op->o_tmpfree( tmp.bv_val, op->o_tmpmemctx );
+	}
+}
+
+static void
+simple_vrFilter2bv( Operation *op, ValuesReturnFilter *vrf, struct berval *fstr )
+{
+	struct berval tmp;
+	ber_len_t len;
+
+	if ( vrf == NULL ) {
+		ber_str2bv_x( "No filter!", sizeof("No filter!")-1, 1, fstr,
+			op->o_tmpmemctx );
+		return;
+	}
+
+	switch ( vrf->vrf_choice ) {
+	case LDAP_FILTER_EQUALITY:
+		filter_escape_value_x( &vrf->vrf_av_value, &tmp, op->o_tmpmemctx );
+
+		fstr->bv_len = vrf->vrf_av_desc->ad_cname.bv_len +
+			tmp.bv_len + ( sizeof("(=)") - 1 );
+		fstr->bv_val = op->o_tmpalloc( fstr->bv_len + 1, op->o_tmpmemctx );
+
+		snprintf( fstr->bv_val, fstr->bv_len + 1, "(%s=%s)",
+			vrf->vrf_av_desc->ad_cname.bv_val,
+			tmp.bv_val );
+
+		ber_memfree_x( tmp.bv_val, op->o_tmpmemctx );
+		break;
+
+	case LDAP_FILTER_GE:
+		filter_escape_value_x( &vrf->vrf_av_value, &tmp, op->o_tmpmemctx );
+
+		fstr->bv_len = vrf->vrf_av_desc->ad_cname.bv_len +
+			tmp.bv_len + ( sizeof("(>=)") - 1 );
+		fstr->bv_val = op->o_tmpalloc( fstr->bv_len + 1, op->o_tmpmemctx );
+
+		snprintf( fstr->bv_val, fstr->bv_len + 1, "(%s>=%s)",
+			vrf->vrf_av_desc->ad_cname.bv_val,
+			tmp.bv_val );
+
+		ber_memfree_x( tmp.bv_val, op->o_tmpmemctx );
+		break;
+
+	case LDAP_FILTER_LE:
+		filter_escape_value_x( &vrf->vrf_av_value, &tmp, op->o_tmpmemctx );
+
+		fstr->bv_len = vrf->vrf_av_desc->ad_cname.bv_len +
+			tmp.bv_len + ( sizeof("(<=)") - 1 );
+		fstr->bv_val = op->o_tmpalloc( fstr->bv_len + 1, op->o_tmpmemctx );
+
+		snprintf( fstr->bv_val, fstr->bv_len + 1, "(%s<=%s)",
+			vrf->vrf_av_desc->ad_cname.bv_val,
+			tmp.bv_val );
+
+		ber_memfree_x( tmp.bv_val, op->o_tmpmemctx );
+		break;
+
+	case LDAP_FILTER_APPROX:
+		filter_escape_value_x( &vrf->vrf_av_value, &tmp, op->o_tmpmemctx );
+
+		fstr->bv_len = vrf->vrf_av_desc->ad_cname.bv_len +
+			tmp.bv_len + ( sizeof("(~=)") - 1 );
+		fstr->bv_val = op->o_tmpalloc( fstr->bv_len + 1, op->o_tmpmemctx );
+
+		snprintf( fstr->bv_val, fstr->bv_len + 1, "(%s~=%s)",
+			vrf->vrf_av_desc->ad_cname.bv_val,
+			tmp.bv_val );
+		ber_memfree_x( tmp.bv_val, op->o_tmpmemctx );
+		break;
+
+	case LDAP_FILTER_SUBSTRINGS:
+		fstr->bv_len = vrf->vrf_sub_desc->ad_cname.bv_len +
+			( sizeof("(=*)") - 1 );
+		fstr->bv_val = op->o_tmpalloc( fstr->bv_len + 128, op->o_tmpmemctx );
+
+		snprintf( fstr->bv_val, fstr->bv_len + 1, "(%s=*)",
+			vrf->vrf_sub_desc->ad_cname.bv_val );
+
+		if ( vrf->vrf_sub_initial.bv_val != NULL ) {
+			len = fstr->bv_len;
+
+			filter_escape_value_x( &vrf->vrf_sub_initial, &tmp, op->o_tmpmemctx );
+
+			fstr->bv_len += tmp.bv_len;
+			fstr->bv_val = op->o_tmprealloc( fstr->bv_val, fstr->bv_len + 1,
+				op->o_tmpmemctx );
+
+			snprintf( &fstr->bv_val[len-2], tmp.bv_len+3,
+				/* "(attr=" */ "%s*)",
+				tmp.bv_val );
+
+			ber_memfree_x( tmp.bv_val, op->o_tmpmemctx );
+		}
+
+		if ( vrf->vrf_sub_any != NULL ) {
+			int i;
+			for ( i = 0; vrf->vrf_sub_any[i].bv_val != NULL; i++ ) {
+				len = fstr->bv_len;
+				filter_escape_value_x( &vrf->vrf_sub_any[i], &tmp,
+					op->o_tmpmemctx );
+
+				fstr->bv_len += tmp.bv_len + 1;
+				fstr->bv_val = op->o_tmprealloc( fstr->bv_val,
+					fstr->bv_len + 1, op->o_tmpmemctx );
+
+				snprintf( &fstr->bv_val[len-1], tmp.bv_len+3,
+					/* "(attr=[init]*[any*]" */ "%s*)",
+					tmp.bv_val );
+				ber_memfree_x( tmp.bv_val, op->o_tmpmemctx );
+			}
+		}
+
+		if ( vrf->vrf_sub_final.bv_val != NULL ) {
+			len = fstr->bv_len;
+
+			filter_escape_value_x( &vrf->vrf_sub_final, &tmp, op->o_tmpmemctx );
+
+			fstr->bv_len += tmp.bv_len;
+			fstr->bv_val = op->o_tmprealloc( fstr->bv_val, fstr->bv_len + 1,
+				op->o_tmpmemctx );
+
+			snprintf( &fstr->bv_val[len-1], tmp.bv_len+3,
+				/* "(attr=[init*][any*]" */ "%s)",
+				tmp.bv_val );
+
+			ber_memfree_x( tmp.bv_val, op->o_tmpmemctx );
+		}
+
+		break;
+
+	case LDAP_FILTER_PRESENT:
+		fstr->bv_len = vrf->vrf_desc->ad_cname.bv_len +
+			( sizeof("(=*)") - 1 );
+		fstr->bv_val = op->o_tmpalloc( fstr->bv_len + 1, op->o_tmpmemctx );
+
+		snprintf( fstr->bv_val, fstr->bv_len + 1, "(%s=*)",
+			vrf->vrf_desc->ad_cname.bv_val );
+		break;
+
+	case LDAP_FILTER_EXT: {
+		struct berval ad;
+		filter_escape_value_x( &vrf->vrf_mr_value, &tmp, op->o_tmpmemctx );
+
+		if ( vrf->vrf_mr_desc ) {
+			ad = vrf->vrf_mr_desc->ad_cname;
+		} else {
+			ad.bv_len = 0;
+			ad.bv_val = "";
+		}
+			
+		fstr->bv_len = ad.bv_len +
+			( vrf->vrf_mr_dnattrs ? sizeof(":dn")-1 : 0 ) +
+			( vrf->vrf_mr_rule_text.bv_len
+				? vrf->vrf_mr_rule_text.bv_len+1 : 0 ) +
+			tmp.bv_len + ( sizeof("(:=)") - 1 );
+		fstr->bv_val = op->o_tmpalloc( fstr->bv_len + 1, op->o_tmpmemctx );
+
+		snprintf( fstr->bv_val, fstr->bv_len + 1, "(%s%s%s%s:=%s)",
+			ad.bv_val,
+			vrf->vrf_mr_dnattrs ? ":dn" : "",
+			vrf->vrf_mr_rule_text.bv_len ? ":" : "",
+			vrf->vrf_mr_rule_text.bv_len ? vrf->vrf_mr_rule_text.bv_val : "",
+			tmp.bv_val );
+
+		ber_memfree_x( tmp.bv_val, op->o_tmpmemctx );
+		} break;
+
+	case SLAPD_FILTER_COMPUTED:
+		ber_str2bv_x(
+			vrf->vrf_result == LDAP_COMPARE_FALSE ? "(?=false)" :
+			vrf->vrf_result == LDAP_COMPARE_TRUE ? "(?=true)" :
+			vrf->vrf_result == SLAPD_COMPARE_UNDEFINED
+				? "(?=undefined)" : "(?=error)",
+			vrf->vrf_result == LDAP_COMPARE_FALSE ? sizeof("(?=false)")-1 :
+			vrf->vrf_result == LDAP_COMPARE_TRUE ? sizeof("(?=true)")-1 :
+			vrf->vrf_result == SLAPD_COMPARE_UNDEFINED
+				? sizeof("(?=undefined)")-1 : sizeof("(?=error)")-1,
+			1, fstr, op->o_tmpmemctx );
+		break;
+
+	default:
+		ber_str2bv_x( "(?=unknown)", sizeof("(?=unknown)")-1,
+			1, fstr, op->o_tmpmemctx );
+		break;
+	}
+}