schema_init.c 102 KB
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/* schema_init.c - init builtin schema */
/* $OpenLDAP$ */
/*
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 * Copyright 1998-2000 The OpenLDAP Foundation, All Rights Reserved.
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 * COPYING RESTRICTIONS APPLY, see COPYRIGHT file
 */

#include "portable.h"

#include <stdio.h>

#include <ac/ctype.h>
#include <ac/string.h>
#include <ac/socket.h>

#include "slap.h"
#include "ldap_pvt.h"
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#define UTF8MATCH 1

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#ifdef USE_MD5
#include "lutil_md5.h"
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/* We should replace MD5 with a faster hash */
#define HASH_BYTES				LUTIL_MD5_BYTES
#define HASH_CONTEXT			lutil_MD5_CTX
#define HASH_Init(c)			lutil_MD5Init(c)
#define HASH_Update(c,buf,len)	lutil_MD5Update(c,buf,len)
#define HASH_Final(d,c)			lutil_MD5Final(d,c)
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#else
#include "lutil_hash.h"
/* We should replace MD5 with a faster hash */
#define HASH_BYTES				LUTIL_HASH_BYTES
#define HASH_CONTEXT			lutil_HASH_CTX
#define HASH_Init(c)			lutil_HASHInit(c)
#define HASH_Update(c,buf,len)	lutil_HASHUpdate(c,buf,len)
#define HASH_Final(d,c)			lutil_HASHFinal(d,c)
#endif
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/* recycled validatation routines */
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#define berValidate						blobValidate
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/* unimplemented pretters */
#define dnPretty						NULL
#define integerPretty					NULL
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/* recycled matching routines */
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#define bitStringMatch					octetStringMatch
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#define integerMatch					caseIgnoreIA5Match
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#define numericStringMatch				caseIgnoreIA5Match
#define objectIdentifierMatch			caseIgnoreIA5Match
#define telephoneNumberMatch			caseIgnoreIA5Match
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#define telephoneNumberSubstringsMatch	caseIgnoreIA5SubstringsMatch
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#define generalizedTimeMatch			caseIgnoreIA5Match
#define generalizedTimeOrderingMatch	caseIgnoreIA5Match
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#define uniqueMemberMatch				dnMatch
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/* approx matching rules */
#define directoryStringApproxMatchOID	"1.3.6.1.4.1.4203.666.4.4"
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#define directoryStringApproxMatch	approxMatch
#define directoryStringApproxIndexer	approxIndexer
#define directoryStringApproxFilter	approxFilter
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#define IA5StringApproxMatchOID			"1.3.6.1.4.1.4203.666.4.5"
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#define IA5StringApproxMatch			approxMatch
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#define IA5StringApproxIndexer			approxIndexer
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#define IA5StringApproxFilter			approxFilter
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/* orderring matching rules */
#define caseIgnoreOrderingMatch			caseIgnoreMatch
#define caseExactOrderingMatch			caseExactMatch

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/* unimplemented matching routines */
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#define caseIgnoreListMatch				NULL
#define caseIgnoreListSubstringsMatch	NULL
#define presentationAddressMatch		NULL
#define protocolInformationMatch		NULL
#define integerFirstComponentMatch		NULL

#define OpenLDAPaciMatch				NULL
#define authPasswordMatch				NULL
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/* recycled indexing/filtering routines */
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#define dnIndexer						caseIgnoreIndexer
#define dnFilter						caseIgnoreFilter
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#define integerIndexer					caseIgnoreIA5Indexer
#define integerFilter					caseIgnoreIA5Filter
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static char *strcasechr( const char *str, int c )
{
	char *lower = strchr( str, TOLOWER(c) );
	char *upper = strchr( str, TOUPPER(c) );
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	if( lower && upper ) {
		return lower < upper ? lower : upper;
	} else if ( lower ) {
		return lower;
	} else {
		return upper;
	}
}
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static int
octetStringMatch(
	int *matchp,
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	slap_mask_t flags,
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	Syntax *syntax,
	MatchingRule *mr,
	struct berval *value,
	void *assertedValue )
{
	int match = value->bv_len - ((struct berval *) assertedValue)->bv_len;

	if( match == 0 ) {
		match = memcmp( value->bv_val,
			((struct berval *) assertedValue)->bv_val,
			value->bv_len );
	}

	*matchp = match;
	return LDAP_SUCCESS;
}

/* Index generation function */
int octetStringIndexer(
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	slap_mask_t use,
	slap_mask_t flags,
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	Syntax *syntax,
	MatchingRule *mr,
	struct berval *prefix,
	struct berval **values,
	struct berval ***keysp )
{
	int i;
	size_t slen, mlen;
	struct berval **keys;
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	HASH_CONTEXT   HASHcontext;
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	unsigned char	HASHdigest[HASH_BYTES];
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	struct berval digest;
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	digest.bv_val = HASHdigest;
	digest.bv_len = sizeof(HASHdigest);
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	/* we should have at least one value at this point */
	assert( values != NULL && values[0] != NULL );

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	for( i=0; values[i] != NULL; i++ ) {
		/* just count them */
	}

	keys = ch_malloc( sizeof( struct berval * ) * (i+1) );

	slen = strlen( syntax->ssyn_oid );
	mlen = strlen( mr->smr_oid );

	for( i=0; values[i] != NULL; i++ ) {
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		HASH_Init( &HASHcontext );
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		if( prefix != NULL && prefix->bv_len > 0 ) {
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			HASH_Update( &HASHcontext,
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				prefix->bv_val, prefix->bv_len );
		}
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		HASH_Update( &HASHcontext,
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			syntax->ssyn_oid, slen );
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		HASH_Update( &HASHcontext,
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			mr->smr_oid, mlen );
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		HASH_Update( &HASHcontext,
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			values[i]->bv_val, values[i]->bv_len );
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		HASH_Final( HASHdigest, &HASHcontext );
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		keys[i] = ber_bvdup( &digest );
	}

	keys[i] = NULL;

	*keysp = keys;

	return LDAP_SUCCESS;
}

/* Index generation function */
int octetStringFilter(
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	slap_mask_t use,
	slap_mask_t flags,
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	Syntax *syntax,
	MatchingRule *mr,
	struct berval *prefix,
	void * assertValue,
	struct berval ***keysp )
{
	size_t slen, mlen;
	struct berval **keys;
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	HASH_CONTEXT   HASHcontext;
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	unsigned char	HASHdigest[HASH_BYTES];
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	struct berval *value = (struct berval *) assertValue;
	struct berval digest;
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	digest.bv_val = HASHdigest;
	digest.bv_len = sizeof(HASHdigest);
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	slen = strlen( syntax->ssyn_oid );
	mlen = strlen( mr->smr_oid );

	keys = ch_malloc( sizeof( struct berval * ) * 2 );

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	HASH_Init( &HASHcontext );
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	if( prefix != NULL && prefix->bv_len > 0 ) {
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		HASH_Update( &HASHcontext,
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			prefix->bv_val, prefix->bv_len );
	}
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	HASH_Update( &HASHcontext,
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		syntax->ssyn_oid, slen );
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	HASH_Update( &HASHcontext,
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		mr->smr_oid, mlen );
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	HASH_Update( &HASHcontext,
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		value->bv_val, value->bv_len );
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	HASH_Final( HASHdigest, &HASHcontext );
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	keys[0] = ber_bvdup( &digest );
	keys[1] = NULL;

	*keysp = keys;

	return LDAP_SUCCESS;
}
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static int
dnValidate(
	Syntax *syntax,
	struct berval *in )
{
	int rc;
	char *dn;

	if( in->bv_len == 0 ) return LDAP_SUCCESS;

	dn = ch_strdup( in->bv_val );

	rc = dn_validate( dn ) == NULL
		? LDAP_INVALID_SYNTAX : LDAP_SUCCESS;

	ch_free( dn );
	return rc;
}

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int
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dnNormalize(
	Syntax *syntax,
	struct berval *val,
	struct berval **normalized )
{
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	struct berval *out;
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	if ( val->bv_len != 0 ) {
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		char *dn;
#ifdef USE_DN_NORMALIZE
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		out = ber_bvstr( UTF8normalize( val->bv_val, UTF8_CASEFOLD ) );
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#else
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		out = ber_bvdup( val );
		ldap_pvt_str2upper( out->bv_val );
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#endif
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		dn = dn_validate( out->bv_val );
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		if( dn == NULL ) {
			ber_bvfree( out );
			return LDAP_INVALID_SYNTAX;
		}

		out->bv_val = dn;
		out->bv_len = strlen( dn );
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	} else {
		out = ber_bvdup( val );
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	}

	*normalized = out;
	return LDAP_SUCCESS;
}

static int
dnMatch(
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	int *matchp,
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	slap_mask_t flags,
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	Syntax *syntax,
	MatchingRule *mr,
	struct berval *value,
	void *assertedValue )
{
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	int match;
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	struct berval *asserted = (struct berval *) assertedValue;
	
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	match = value->bv_len - asserted->bv_len;

	if( match == 0 ) {
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#ifdef USE_DN_NORMALIZE
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		match = strcmp( value->bv_val, asserted->bv_val );
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#else
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		match = strcasecmp( value->bv_val, asserted->bv_val );
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#endif
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	}

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#ifdef NEW_LOGGING
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	LDAP_LOG(( "schema", LDAP_LEVEL_ENTRY,
		   "dnMatch: %d\n    %s\n    %s\n", match,
		   value->bv_val, asserted->bv_val ));
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#else
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	Debug( LDAP_DEBUG_ARGS, "dnMatch %d\n\t\"%s\"\n\t\"%s\"\n",
	    match, value->bv_val, asserted->bv_val );
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#endif

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	*matchp = match;
	return LDAP_SUCCESS;
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}
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static int
nameUIDValidate(
	Syntax *syntax,
	struct berval *in )
{
	int rc;
	struct berval *dn;

	if( in->bv_len == 0 ) return LDAP_SUCCESS;

	dn = ber_bvdup( in );

	if( dn->bv_val[dn->bv_len-1] == '\'' ) {
		/* assume presence of optional UID */
		ber_len_t i;

		for(i=dn->bv_len-2; i>2; i--) {
			if( dn->bv_val[i] != '0' &&	dn->bv_val[i] != '1' ) {
				break;
			}
		}
		if( dn->bv_val[i] != '\'' ) {
			return LDAP_INVALID_SYNTAX;
		}
		if( dn->bv_val[i-1] != 'B' ) {
			return LDAP_INVALID_SYNTAX;
		}
		if( dn->bv_val[i-2] != '#' ) {
			return LDAP_INVALID_SYNTAX;
		}

		/* trim the UID to allow use of dn_validate */
		dn->bv_val[i-2] = '\0';
	}

	rc = dn_validate( dn->bv_val ) == NULL
		? LDAP_INVALID_SYNTAX : LDAP_SUCCESS;

	ber_bvfree( dn );
	return rc;
}

static int
nameUIDNormalize(
	Syntax *syntax,
	struct berval *val,
	struct berval **normalized )
{
	struct berval *out = ber_bvdup( val );

	if( out->bv_len != 0 ) {
		char *dn;
		ber_len_t dnlen;
		char *uid = NULL;
		ber_len_t uidlen = 0;

		if( out->bv_val[out->bv_len-1] == '\'' ) {
			/* assume presence of optional UID */
			uid = strrchr( out->bv_val, '#' );

			if( uid == NULL ) {
				ber_bvfree( out );
				return LDAP_INVALID_SYNTAX;
			}

			uidlen = out->bv_len - (out->bv_val - uid);
			/* temporarily trim the UID */
			*uid = '\0';
		}

#ifdef USE_DN_NORMALIZE
		dn = dn_normalize( out->bv_val );
#else
		dn = dn_validate( out->bv_val );
#endif

		if( dn == NULL ) {
			ber_bvfree( out );
			return LDAP_INVALID_SYNTAX;
		}

		dnlen = strlen(dn);

		if( uidlen ) {
			/* restore the separator */
			*uid = '#';
			/* shift the UID */
			SAFEMEMCPY( &dn[dnlen], uid, uidlen );
		}

		out->bv_val = dn;
		out->bv_len = dnlen + uidlen;
	}

	*normalized = out;
	return LDAP_SUCCESS;
}

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static int
inValidate(
	Syntax *syntax,
	struct berval *in )
{
	/* any value allowed */
	return LDAP_OTHER;
}

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static int
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blobValidate(
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	Syntax *syntax,
	struct berval *in )
{
	/* any value allowed */
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	return LDAP_SUCCESS;
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}

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static int
bitStringValidate(
	Syntax *syntax,
	struct berval *in )
{
	ber_len_t i;

	/* very unforgiving validation, requires no normalization
	 * before simplistic matching
	 */
	if( in->bv_len < 3 ) {
		return LDAP_INVALID_SYNTAX;
	}
	if( in->bv_val[0] != 'B' ||
		in->bv_val[1] != '\'' ||
		in->bv_val[in->bv_len-1] != '\'' )
	{
		return LDAP_INVALID_SYNTAX;
	}

	for( i=in->bv_len-2; i>1; i-- ) {
		if( in->bv_val[i] != '0' && in->bv_val[i] != '1' ) {
			return LDAP_INVALID_SYNTAX;
		}
	}

	return LDAP_SUCCESS;
}

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/*
 * Handling boolean syntax and matching is quite rigid.
 * A more flexible approach would be to allow a variety
 * of strings to be normalized and prettied into TRUE
 * and FALSE.
 */
static int
booleanValidate(
	Syntax *syntax,
	struct berval *in )
{
	/* very unforgiving validation, requires no normalization
	 * before simplistic matching
	 */

	if( in->bv_len == 4 ) {
		if( !memcmp( in->bv_val, "TRUE", 4 ) ) {
			return LDAP_SUCCESS;
		}
	} else if( in->bv_len == 5 ) {
		if( !memcmp( in->bv_val, "FALSE", 5 ) ) {
			return LDAP_SUCCESS;
		}
	}

	return LDAP_INVALID_SYNTAX;
}

static int
booleanMatch(
	int *matchp,
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	slap_mask_t flags,
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	Syntax *syntax,
	MatchingRule *mr,
	struct berval *value,
	void *assertedValue )
{
	/* simplistic matching allowed by rigid validation */
	struct berval *asserted = (struct berval *) assertedValue;
	*matchp = value->bv_len != asserted->bv_len;
	return LDAP_SUCCESS;
}

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#if UTF8MATCH
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static int
UTF8casecmp(
	struct berval *right,
	struct berval *left )
{
	ber_len_t r, l;
	int rlen, llen;
	ldap_unicode_t ru, lu;
	ldap_unicode_t ruu, luu;

	for( r=0, l=0;
		r < right->bv_len && l < left->bv_len;
		r+=rlen, l+=llen )
	{
		/*
		 * XXYYZ: we convert to ucs4 even though -llunicode
		 * expects ucs2 in an unsigned long
		 */
		ru = ldap_utf8_to_ucs4( &right->bv_val[r] );
		if( ru == LDAP_UCS4_INVALID ) {
			return 1;
		}

		lu = ldap_utf8_to_ucs4( &left->bv_val[l] );
		if( lu == LDAP_UCS4_INVALID ) {
			return -1;
		}

		ruu = uctoupper( ru );
		luu = uctoupper( lu );

		if( ruu > luu ) {
			return 1;
		} else if( luu > ruu ) {
			return -1;
		}

		rlen = LDAP_UTF8_CHARLEN( &right->bv_val[r] );
		llen = LDAP_UTF8_CHARLEN( &left->bv_val[l] );
	}

	if( r < right->bv_len ) {
		/* less left */
		return -1;
	}

	if( l < left->bv_len ) {
		/* less right */
		return 1;
	}

	return 0;
}
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/* case insensitive UTF8 strncmp with offset for second string */
static int
UTF8oncasecmp(
	struct berval *right,
	struct berval *left,
	ber_len_t len,
	ber_len_t offset )
{
	ber_len_t r, l;
	int rlen, llen;
	int rslen, lslen;
	ldap_unicode_t ru, lu;
	ldap_unicode_t ruu, luu;

	rslen = len < right->bv_len ? len : right->bv_len;
	lslen = len + offset < left->bv_len ? len : left->bv_len;

	for( r = 0, l = offset;
		r < rslen && l < lslen;
		r+=rlen, l+=llen )
	{
		/*
		 * XXYYZ: we convert to ucs4 even though -llunicode
		 * expects ucs2 in an unsigned long
		 */
		ru = ldap_utf8_to_ucs4( &right->bv_val[r] );
		if( ru == LDAP_UCS4_INVALID ) {
			return 1;
		}

		lu = ldap_utf8_to_ucs4( &left->bv_val[l] );
		if( lu == LDAP_UCS4_INVALID ) {
			return -1;
		}

		ruu = uctoupper( ru );
		luu = uctoupper( lu );

		if( ruu > luu ) {
			return 1;
		} else if( luu > ruu ) {
			return -1;
		}

		rlen = LDAP_UTF8_CHARLEN( &right->bv_val[r] );
		llen = LDAP_UTF8_CHARLEN( &left->bv_val[l] );
	}

	if( r < rslen ) {
		/* less left */
		return -1;
	}

	if( l < lslen ) {
		/* less right */
		return 1;
	}

	return 0;
}

static char *UTF8casechr( const char *str, const char *c )
{
	char *p, *lower, *upper;
	ldap_ucs4_t tch, ch = ldap_utf8_to_ucs4(c);

	tch = uctolower ( ch );
	for( p = (char *) str; *p != '\0'; LDAP_UTF8_INCR(p) ) {
		if( ldap_utf8_to_ucs4( p ) == tch ) {
			break;
		} 
	}
	lower = *p != '\0' ? p : NULL;

	tch = uctoupper ( ch );
	for( p = (char *) str; *p != '\0'; LDAP_UTF8_INCR(p) ) {
		if( ldap_utf8_to_ucs4( p ) == tch ) {
			break;
		} 
	}
	upper = *p != '\0' ? p : NULL;
	
	if( lower && upper ) {
		return lower < upper ? lower : upper;
	} else if ( lower ) {
		return lower;
	} else {
		return upper;
	}
}
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#endif

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static int
UTF8StringValidate(
	Syntax *syntax,
	struct berval *in )
{
	ber_len_t count;
	int len;
	unsigned char *u = in->bv_val;

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	if( !in->bv_len ) return LDAP_INVALID_SYNTAX;

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	for( count = in->bv_len; count > 0; count-=len, u+=len ) {
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		/* get the length indicated by the first byte */
		len = LDAP_UTF8_CHARLEN( u );

		/* should not be zero */
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		if( len == 0 ) return LDAP_INVALID_SYNTAX;
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		/* make sure len corresponds with the offset
			to the next character */
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		if( LDAP_UTF8_OFFSET( u ) != len ) return LDAP_INVALID_SYNTAX;
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	}

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	if( count != 0 ) return LDAP_INVALID_SYNTAX;
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	return LDAP_SUCCESS;
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}

static int
UTF8StringNormalize(
	Syntax *syntax,
	struct berval *val,
	struct berval **normalized )
{
	struct berval *newval;
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	char *p, *q, *s;
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	newval = ch_malloc( sizeof( struct berval ) );
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	p = val->bv_val;
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	/* Ignore initial whitespace */
	while ( ldap_utf8_isspace( p ) ) {
		LDAP_UTF8_INCR( p );
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	}
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	if( *p == '\0' ) {
		ch_free( newval );
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		return LDAP_INVALID_SYNTAX;
	}
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	newval->bv_val = ch_strdup( p );
	p = q = newval->bv_val;
	s = NULL;
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	while ( *p ) {
		int len;
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		if ( ldap_utf8_isspace( p ) ) {
			len = LDAP_UTF8_COPY(q,p);
			s=q;
			p+=len;
			q+=len;
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			/* Ignore the extra whitespace */
			while ( ldap_utf8_isspace( p ) ) {
				LDAP_UTF8_INCR( p );
			}
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		} else {
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			len = LDAP_UTF8_COPY(q,p);
			s=NULL;
			p+=len;
			q+=len;
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		}
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	}

	assert( *newval->bv_val );
	assert( newval->bv_val < p );
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	assert( q <= p );
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	/* cannot start with a space */
	assert( !ldap_utf8_isspace(newval->bv_val) );

	/*
	 * If the string ended in space, backup the pointer one
	 * position.  One is enough because the above loop collapsed
	 * all whitespace to a single space.
	 */

	if ( s != NULL ) {
		q = s;
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	}
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	/* cannot end with a space */
	assert( !ldap_utf8_isspace( LDAP_UTF8_PREV(q) ) );

	/* null terminate */
	*q = '\0';

	newval->bv_len = q - newval->bv_val;
	*normalized = newval;
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	return LDAP_SUCCESS;
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}

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#if defined(SLAPD_APPROX_MULTISTRING)

#if defined(SLAPD_APPROX_INITIALS)
#define SLAPD_APPROX_DELIMITER "._ "
#define SLAPD_APPROX_WORDLEN 2
#else
#define SLAPD_APPROX_DELIMITER " "
#define SLAPD_APPROX_WORDLEN 1
#endif

static int
approxMatch(
	int *matchp,
	slap_mask_t flags,
	Syntax *syntax,
	MatchingRule *mr,
	struct berval *value,
	void *assertedValue )
{
	char *val, *assertv, **values, **words, *c;
	int i, count, len, nextchunk=0, nextavail=0;


	/* Isolate how many words there are */
	val = ch_strdup( value->bv_val );
	for( c=val,count=1; *c; c++ ) {
		c = strpbrk( c, SLAPD_APPROX_DELIMITER );
		if ( c == NULL ) break;
		*c = '\0';
		count++;
	}

	/* Get a phonetic copy of each word */
	words = (char **)ch_malloc( count * sizeof(char *) );
	values = (char **)ch_malloc( count * sizeof(char *) );
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	for( c=val,i=0;	 i<count;  i++,c+=strlen(c)+1 ) {
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		words[i] = c;
		values[i] = phonetic(c);
	}


	/* Work through the asserted value's words, to see if  at least some
	   of the words are there, in the same order. */
	assertv = ch_strdup( ((struct berval *)assertedValue)->bv_val );
	len = 0;
	while ( nextchunk < ((struct berval *)assertedValue)->bv_len ) {
		len = strcspn( assertv + nextchunk, SLAPD_APPROX_DELIMITER);
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		if( len == 0 ) {
			nextchunk++;
			continue;
		}
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#if defined(SLAPD_APPROX_INITIALS)
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		else if( len == 1 ) {
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			/* Single letter words need to at least match one word's initial */
			for( i=nextavail; i<count; i++ )
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				if( !strncasecmp( assertv+nextchunk, words[i], 1 )) {
					nextavail=i+1;
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					break;
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				}
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		}
#endif
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		else {
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			/* Isolate the next word in the asserted value and phonetic it */
			assertv[nextchunk+len] = '\0';
			val = phonetic( assertv + nextchunk );

			/* See if this phonetic chunk is in the remaining words of *value */
			for( i=nextavail; i<count; i++ ){
				if( !strcmp( val, values[i] ) ){
					nextavail = i+1;
					break;
				}
			}
		}

		/* This chunk in the asserted value was NOT within the *value. */
		if( i >= count ) {
			nextavail=-1;
			break;
		}

		/* Go on to the next word in the asserted value */
		nextchunk += len+1;
	}

	/* If some of the words were seen, call it a match */
	if( nextavail > 0 ) {
		*matchp = 0;
	}
	else {
		*matchp = 1;
	}

	/* Cleanup allocs */
	ch_free( assertv );
	for( i=0; i<count; i++ ) {
		ch_free( values[i] );
	}
	ch_free( values );
	ch_free( words );
	ch_free( val );

	return LDAP_SUCCESS;
}


int 
approxIndexer(
	slap_mask_t use,
	slap_mask_t flags,
	Syntax *syntax,
	MatchingRule *mr,
	struct berval *prefix,
	struct berval **values,
	struct berval ***keysp )
{
	char *val, *c;
	int i,j, len, wordcount, keycount=0;
	struct berval **newkeys, **keys=NULL;


	for( j=0; values[j] != NULL; j++ ) {

		/* Isolate how many words there are. There will be a key for each */
		val = ch_strdup( values[j]->bv_val );
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		for( wordcount=0,c=val;	 *c;  c++) {
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			len = strcspn(c, SLAPD_APPROX_DELIMITER);
			if( len >= SLAPD_APPROX_WORDLEN ) wordcount++;
			c+= len;
			if (*c == '\0') break;
			*c = '\0';
		}

		/* Allocate/increase storage to account for new keys */
		newkeys = (struct berval **)ch_malloc( (keycount + wordcount + 1) 
		   * sizeof(struct berval *) );
		memcpy( newkeys, keys, keycount * sizeof(struct berval *) );
		if( keys ) ch_free( keys );
		keys = newkeys;

		/* Get a phonetic copy of each word */
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		for( c=val,i=0;	 i<wordcount;  c+=len+1	 ) {
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			len = strlen( c );
			if( len < SLAPD_APPROX_WORDLEN ) continue;
			keys[keycount] = (struct berval *)ch_malloc( sizeof(struct berval) );
			keys[keycount]->bv_val = phonetic( c );
			keys[keycount]->bv_len = strlen( keys[keycount]->bv_val );
			keycount++;
			i++;
		}

		ch_free( val );
	}
	keys[keycount] = NULL;
	*keysp = keys;

	return LDAP_SUCCESS;
}


int 
approxFilter(
	slap_mask_t use,
	slap_mask_t flags,
	Syntax *syntax,
	MatchingRule *mr,
	struct berval *prefix,
	void * assertValue,
	struct berval ***keysp )
{
	char *val, *c;
	int i, count, len;
	struct berval **keys;


	/* Isolate how many words there are. There will be a key for each */
	val = ch_strdup( ((struct berval *)assertValue)->bv_val );
	for( count=0,c=val;  *c;  c++) {
		len = strcspn(c, SLAPD_APPROX_DELIMITER);
		if( len >= SLAPD_APPROX_WORDLEN ) count++;
		c+= len;
		if (*c == '\0') break;
		*c = '\0';
	}

	/* Allocate storage for new keys */
	keys = (struct berval **)ch_malloc( (count + 1) * sizeof(struct berval *) );

	/* Get a phonetic copy of each word */
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	for( c=val,i=0;	 i<count; c+=len+1 ) {
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		len = strlen(c);
		if( len < SLAPD_APPROX_WORDLEN ) continue;
		keys[i] = (struct berval *)ch_malloc( sizeof(struct berval) );
		keys[i]->bv_val = phonetic( c );
		keys[i]->bv_len = strlen( keys[i]->bv_val );
		i++;
	}

	ch_free( val );

	keys[count] = NULL;
	*keysp = keys;

	return LDAP_SUCCESS;
}


#else
/* No other form of Approximate Matching is defined */

static int
approxMatch(
	int *matchp,
	slap_mask_t flags,
	Syntax *syntax,
	MatchingRule *mr,
	struct berval *value,
	void *assertedValue )
{
	char *vapprox, *avapprox;

	vapprox = phonetic( value->bv_val );
	avapprox = phonetic( ((struct berval *)assertedValue)->bv_val);

	*matchp = strcmp( vapprox, avapprox );

	ch_free( vapprox );
	ch_free( avapprox );

	return LDAP_SUCCESS;
}

int 
approxIndexer(
	slap_mask_t use,
	slap_mask_t flags,
	Syntax *syntax,
	MatchingRule *mr,
	struct berval *prefix,
	struct berval **values,
	struct berval ***keysp )
{
	int i;
	struct berval **keys;


	for( i=0; values[i] != NULL; i++ ) {
		/* just count them */
	}
	assert( i > 0 );

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