/* accesslog.c - log operations for audit/history purposes */
/* $OpenLDAP: pkg/ldap/servers/slapd/overlays/accesslog.c,v 1.2.2.27 2008/05/01 20:36:54 quanah Exp $ */
/* This work is part of OpenLDAP Software <http://www.openldap.org/>.
 *
 * Copyright 2005-2008 The OpenLDAP Foundation.
 * Portions copyright 2004-2005 Symas Corporation.
 * All rights reserved.
 *
 * Redistribution and use in source and binary forms, with or without
 * modification, are permitted only as authorized by the OpenLDAP
 * Public License.
 *
 * A copy of this license is available in the file LICENSE in the
 * top-level directory of the distribution or, alternatively, at
 * <http://www.OpenLDAP.org/license.html>.
 */
/* ACKNOWLEDGEMENTS:
 * This work was initially developed by Howard Chu for inclusion in
 * OpenLDAP Software.
 */

#include "portable.h"

#ifdef SLAPD_OVER_ACCESSLOG

#include <stdio.h>

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

#include "slap.h"
#include "config.h"
#include "lutil.h"
#include "ldap_rq.h"

#define LOG_OP_ADD	0x001
#define LOG_OP_DELETE	0x002
#define	LOG_OP_MODIFY	0x004
#define LOG_OP_MODRDN	0x008
#define	LOG_OP_COMPARE	0x010
#define	LOG_OP_SEARCH	0x020
#define LOG_OP_BIND	0x040
#define LOG_OP_UNBIND	0x080
#define	LOG_OP_ABANDON	0x100
#define	LOG_OP_EXTENDED	0x200
#define LOG_OP_UNKNOWN	0x400

#define	LOG_OP_WRITES	(LOG_OP_ADD|LOG_OP_DELETE|LOG_OP_MODIFY|LOG_OP_MODRDN)
#define	LOG_OP_READS	(LOG_OP_COMPARE|LOG_OP_SEARCH)
#define	LOG_OP_SESSION	(LOG_OP_BIND|LOG_OP_UNBIND|LOG_OP_ABANDON)
#define LOG_OP_ALL		(LOG_OP_READS|LOG_OP_WRITES|LOG_OP_SESSION| \
	LOG_OP_EXTENDED|LOG_OP_UNKNOWN)

typedef struct log_info {
	BackendDB *li_db;
	slap_mask_t li_ops;
	int li_age;
	int li_cycle;
	struct re_s *li_task;
	Filter *li_oldf;
	Entry *li_old;
	int li_success;
	ldap_pvt_thread_mutex_t li_op_mutex;
	ldap_pvt_thread_mutex_t li_log_mutex;
} log_info;

static ConfigDriver log_cf_gen;

enum {
	LOG_DB = 1,
	LOG_OPS,
	LOG_PURGE,
	LOG_SUCCESS,
	LOG_OLD
};

static ConfigTable log_cfats[] = {
	{ "logdb", "suffix", 2, 2, 0, ARG_DN|ARG_MAGIC|LOG_DB,
		log_cf_gen, "( OLcfgOvAt:4.1 NAME 'olcAccessLogDB' "
			"DESC 'Suffix of database for log content' "
			"SUP distinguishedName SINGLE-VALUE )", NULL, NULL },
	{ "logops", "op|writes|reads|session|all", 2, 0, 0,
		ARG_MAGIC|LOG_OPS,
		log_cf_gen, "( OLcfgOvAt:4.2 NAME 'olcAccessLogOps' "
			"DESC 'Operation types to log' "
			"EQUALITY caseIgnoreMatch "
			"SYNTAX OMsDirectoryString )", NULL, NULL },
	{ "logpurge", "age> <interval", 3, 3, 0, ARG_MAGIC|LOG_PURGE,
		log_cf_gen, "( OLcfgOvAt:4.3 NAME 'olcAccessLogPurge' "
			"DESC 'Log cleanup parameters' "
			"SYNTAX OMsDirectoryString SINGLE-VALUE )", NULL, NULL },
	{ "logsuccess", NULL, 2, 2, 0, ARG_MAGIC|ARG_ON_OFF|LOG_SUCCESS,
		log_cf_gen, "( OLcfgOvAt:4.4 NAME 'olcAccessLogSuccess' "
			"DESC 'Log successful ops only' "
			"SYNTAX OMsBoolean SINGLE-VALUE )", NULL, NULL },
	{ "logold", "filter", 2, 2, 0, ARG_MAGIC|LOG_OLD,
		log_cf_gen, "( OLcfgOvAt:4.5 NAME 'olcAccessLogOld' "
			"DESC 'Log old values when modifying entries matching the filter' "
			"SYNTAX OMsDirectoryString SINGLE-VALUE )", NULL, NULL },
	{ NULL }
};

static ConfigOCs log_cfocs[] = {
	{ "( OLcfgOvOc:4.1 "
		"NAME 'olcAccessLogConfig' "
		"DESC 'Access log configuration' "
		"SUP olcOverlayConfig "
		"MUST olcAccessLogDB "
		"MAY ( olcAccessLogOps $ olcAccessLogPurge $ olcAccessLogSuccess $ "
			"olcAccessLogOld ) )",
			Cft_Overlay, log_cfats },
	{ NULL }
};

static slap_verbmasks logops[] = {
	{ BER_BVC("all"),		LOG_OP_ALL },
	{ BER_BVC("writes"),	LOG_OP_WRITES },
	{ BER_BVC("session"),	LOG_OP_SESSION },
	{ BER_BVC("reads"),		LOG_OP_READS },
	{ BER_BVC("add"),		LOG_OP_ADD },
	{ BER_BVC("delete"),	LOG_OP_DELETE },
	{ BER_BVC("modify"),	LOG_OP_MODIFY },
	{ BER_BVC("modrdn"),	LOG_OP_MODRDN },
	{ BER_BVC("compare"),	LOG_OP_COMPARE },
	{ BER_BVC("search"),	LOG_OP_SEARCH },
	{ BER_BVC("bind"),		LOG_OP_BIND },
	{ BER_BVC("unbind"),	LOG_OP_UNBIND },
	{ BER_BVC("abandon"),	LOG_OP_ABANDON },
	{ BER_BVC("extended"),	LOG_OP_EXTENDED },
	{ BER_BVC("unknown"),	LOG_OP_UNKNOWN },
	{ BER_BVNULL, 0 }
};

/* Start with "add" in logops */
#define EN_OFFSET	4

enum {
	LOG_EN_ADD = 0,
	LOG_EN_DELETE,
	LOG_EN_MODIFY,
	LOG_EN_MODRDN,
	LOG_EN_COMPARE,
	LOG_EN_SEARCH,
	LOG_EN_BIND,
	LOG_EN_UNBIND,
	LOG_EN_ABANDON,
	LOG_EN_EXTENDED,
	LOG_EN_UNKNOWN,
	LOG_EN__COUNT
};

static ObjectClass *log_ocs[LOG_EN__COUNT], *log_container;

#define LOG_SCHEMA_ROOT	"1.3.6.1.4.1.4203.666.11.5"

#define LOG_SCHEMA_AT LOG_SCHEMA_ROOT ".1"
#define LOG_SCHEMA_OC LOG_SCHEMA_ROOT ".2"

static AttributeDescription *ad_reqDN, *ad_reqStart, *ad_reqEnd, *ad_reqType,
	*ad_reqSession, *ad_reqResult, *ad_reqAuthzID, *ad_reqControls,
	*ad_reqRespControls, *ad_reqMethod, *ad_reqAssertion, *ad_reqNewRDN,
	*ad_reqNewSuperior, *ad_reqDeleteOldRDN, *ad_reqMod,
	*ad_reqScope, *ad_reqFilter, *ad_reqAttr, *ad_reqEntries,
	*ad_reqSizeLimit, *ad_reqTimeLimit, *ad_reqAttrsOnly, *ad_reqData,
	*ad_reqId, *ad_reqMessage, *ad_reqVersion, *ad_reqDerefAliases,
	*ad_reqReferral, *ad_reqOld;

static struct {
	char *at;
	AttributeDescription **ad;
} lattrs[] = {
	{ "( " LOG_SCHEMA_AT ".1 NAME 'reqDN' "
		"DESC 'Target DN of request' "
		"EQUALITY distinguishedNameMatch "
		"SYNTAX OMsDN "
		"SINGLE-VALUE )", &ad_reqDN },
	{ "( " LOG_SCHEMA_AT ".2 NAME 'reqStart' "
		"DESC 'Start time of request' "
		"EQUALITY generalizedTimeMatch "
		"ORDERING generalizedTimeOrderingMatch "
		"SYNTAX 1.3.6.1.4.1.1466.115.121.1.24 "
		"SINGLE-VALUE )", &ad_reqStart },
	{ "( " LOG_SCHEMA_AT ".3 NAME 'reqEnd' "
		"DESC 'End time of request' "
		"EQUALITY generalizedTimeMatch "
		"ORDERING generalizedTimeOrderingMatch "
		"SYNTAX 1.3.6.1.4.1.1466.115.121.1.24 "
		"SINGLE-VALUE )", &ad_reqEnd },
	{ "( " LOG_SCHEMA_AT ".4 NAME 'reqType' "
		"DESC 'Type of request' "
		"EQUALITY caseIgnoreMatch "
		"SYNTAX OMsDirectoryString "
		"SINGLE-VALUE )", &ad_reqType },
	{ "( " LOG_SCHEMA_AT ".5 NAME 'reqSession' "
		"DESC 'Session ID of request' "
		"EQUALITY caseIgnoreMatch "
		"SYNTAX OMsDirectoryString "
		"SINGLE-VALUE )", &ad_reqSession },
	{ "( " LOG_SCHEMA_AT ".6 NAME 'reqAuthzID' "
		"DESC 'Authorization ID of requestor' "
		"EQUALITY distinguishedNameMatch "
		"SYNTAX OMsDN "
		"SINGLE-VALUE )", &ad_reqAuthzID },
	{ "( " LOG_SCHEMA_AT ".7 NAME 'reqResult' "
		"DESC 'Result code of request' "
		"EQUALITY integerMatch "
		"ORDERING integerOrderingMatch "
		"SYNTAX OMsInteger "
		"SINGLE-VALUE )", &ad_reqResult },
	{ "( " LOG_SCHEMA_AT ".8 NAME 'reqMessage' "
		"DESC 'Error text of request' "
		"EQUALITY caseIgnoreMatch "
		"SUBSTR caseIgnoreSubstringsMatch "
		"SYNTAX OMsDirectoryString "
		"SINGLE-VALUE )", &ad_reqMessage },
	{ "( " LOG_SCHEMA_AT ".9 NAME 'reqReferral' "
		"DESC 'Referrals returned for request' "
		"SUP labeledURI )", &ad_reqReferral },
	{ "( " LOG_SCHEMA_AT ".10 NAME 'reqControls' "
		"DESC 'Request controls' "
		"SYNTAX OMsOctetString )", &ad_reqControls },
	{ "( " LOG_SCHEMA_AT ".11 NAME 'reqRespControls' "
		"DESC 'Response controls of request' "
		"SYNTAX OMsOctetString )", &ad_reqRespControls },
	{ "( " LOG_SCHEMA_AT ".12 NAME 'reqId' "
		"DESC 'ID of Request to Abandon' "
		"EQUALITY integerMatch "
		"ORDERING integerOrderingMatch "
		"SYNTAX OMsInteger "
		"SINGLE-VALUE )", &ad_reqId },
	{ "( " LOG_SCHEMA_AT ".13 NAME 'reqVersion' "
		"DESC 'Protocol version of Bind request' "
		"EQUALITY integerMatch "
		"ORDERING integerOrderingMatch "
		"SYNTAX OMsInteger "
		"SINGLE-VALUE )", &ad_reqVersion },
	{ "( " LOG_SCHEMA_AT ".14 NAME 'reqMethod' "
		"DESC 'Bind method of request' "
		"EQUALITY caseIgnoreMatch "
		"SYNTAX OMsDirectoryString "
		"SINGLE-VALUE )", &ad_reqMethod },
	{ "( " LOG_SCHEMA_AT ".15 NAME 'reqAssertion' "
		"DESC 'Compare Assertion of request' "
		"SYNTAX OMsDirectoryString "
		"SINGLE-VALUE )", &ad_reqAssertion },
	{ "( " LOG_SCHEMA_AT ".16 NAME 'reqMod' "
		"DESC 'Modifications of request' "
		"EQUALITY octetStringMatch "
		"SUBSTR octetStringSubstringsMatch "
		"SYNTAX OMsOctetString )", &ad_reqMod },
	{ "( " LOG_SCHEMA_AT ".17 NAME 'reqOld' "
		"DESC 'Old values of entry before request completed' "
		"EQUALITY octetStringMatch "
		"SUBSTR octetStringSubstringsMatch "
		"SYNTAX OMsOctetString )", &ad_reqOld },
	{ "( " LOG_SCHEMA_AT ".18 NAME 'reqNewRDN' "
		"DESC 'New RDN of request' "
		"EQUALITY distinguishedNameMatch "
		"SYNTAX OMsDN "
		"SINGLE-VALUE )", &ad_reqNewRDN },
	{ "( " LOG_SCHEMA_AT ".19 NAME 'reqDeleteOldRDN' "
		"DESC 'Delete old RDN' "
		"EQUALITY booleanMatch "
		"SYNTAX OMsBoolean "
		"SINGLE-VALUE )", &ad_reqDeleteOldRDN },
	{ "( " LOG_SCHEMA_AT ".20 NAME 'reqNewSuperior' "
		"DESC 'New superior DN of request' "
		"EQUALITY distinguishedNameMatch "
		"SYNTAX OMsDN "
		"SINGLE-VALUE )", &ad_reqNewSuperior },
	{ "( " LOG_SCHEMA_AT ".21 NAME 'reqScope' "
		"DESC 'Scope of request' "
		"EQUALITY caseIgnoreMatch "
		"SYNTAX OMsDirectoryString "
		"SINGLE-VALUE )", &ad_reqScope },
	{ "( " LOG_SCHEMA_AT ".22 NAME 'reqDerefAliases' "
		"DESC 'Disposition of Aliases in request' "
		"EQUALITY caseIgnoreMatch "
		"SYNTAX OMsDirectoryString "
		"SINGLE-VALUE )", &ad_reqDerefAliases },
	{ "( " LOG_SCHEMA_AT ".23 NAME 'reqAttrsOnly' "
		"DESC 'Attributes and values of request' "
		"EQUALITY booleanMatch "
		"SYNTAX OMsBoolean "
		"SINGLE-VALUE )", &ad_reqAttrsOnly },
	{ "( " LOG_SCHEMA_AT ".24 NAME 'reqFilter' "
		"DESC 'Filter of request' "
		"EQUALITY caseIgnoreMatch "
		"SUBSTR caseIgnoreSubstringsMatch "
		"SYNTAX OMsDirectoryString "
		"SINGLE-VALUE )", &ad_reqFilter },
	{ "( " LOG_SCHEMA_AT ".25 NAME 'reqAttr' "
		"DESC 'Attributes of request' "
		"EQUALITY caseIgnoreMatch "
		"SYNTAX OMsDirectoryString )", &ad_reqAttr },
	{ "( " LOG_SCHEMA_AT ".26 NAME 'reqSizeLimit' "
		"DESC 'Size limit of request' "
		"EQUALITY integerMatch "
		"ORDERING integerOrderingMatch "
		"SYNTAX OMsInteger "
		"SINGLE-VALUE )", &ad_reqSizeLimit },
	{ "( " LOG_SCHEMA_AT ".27 NAME 'reqTimeLimit' "
		"DESC 'Time limit of request' "
		"EQUALITY integerMatch "
		"ORDERING integerOrderingMatch "
		"SYNTAX OMsInteger "
		"SINGLE-VALUE )", &ad_reqTimeLimit },
	{ "( " LOG_SCHEMA_AT ".28 NAME 'reqEntries' "
		"DESC 'Number of entries returned' "
		"EQUALITY integerMatch "
		"ORDERING integerOrderingMatch "
		"SYNTAX OMsInteger "
		"SINGLE-VALUE )", &ad_reqEntries },
	{ "( " LOG_SCHEMA_AT ".29 NAME 'reqData' "
		"DESC 'Data of extended request' "
		"EQUALITY octetStringMatch "
		"SUBSTR octetStringSubstringsMatch "
		"SYNTAX OMsOctetString "
		"SINGLE-VALUE )", &ad_reqData },
	{ NULL, NULL }
};

static struct {
	char *ot;
	ObjectClass **oc;
} locs[] = {
	{ "( " LOG_SCHEMA_OC ".0 NAME 'auditContainer' "
		"DESC 'AuditLog container' "
		"SUP top STRUCTURAL "
		"MAY ( cn $ reqStart $ reqEnd ) )", &log_container },
	{ "( " LOG_SCHEMA_OC ".1 NAME 'auditObject' "
		"DESC 'OpenLDAP request auditing' "
		"SUP top STRUCTURAL "
		"MUST ( reqStart $ reqType $ reqSession ) "
		"MAY ( reqDN $ reqAuthzID $ reqControls $ reqRespControls $ reqEnd $ "
			"reqResult $ reqMessage $ reqReferral ) )",
				&log_ocs[LOG_EN_UNBIND] },
	{ "( " LOG_SCHEMA_OC ".2 NAME 'auditReadObject' "
		"DESC 'OpenLDAP read request record' "
		"SUP auditObject STRUCTURAL )", NULL },
	{ "( " LOG_SCHEMA_OC ".3 NAME 'auditWriteObject' "
		"DESC 'OpenLDAP write request record' "
		"SUP auditObject STRUCTURAL )", NULL },
	{ "( " LOG_SCHEMA_OC ".4 NAME 'auditAbandon' "
		"DESC 'Abandon operation' "
		"SUP auditObject STRUCTURAL "
		"MUST reqId )", &log_ocs[LOG_EN_ABANDON] },
	{ "( " LOG_SCHEMA_OC ".5 NAME 'auditAdd' "
		"DESC 'Add operation' "
		"SUP auditWriteObject STRUCTURAL "
		"MUST reqMod )", &log_ocs[LOG_EN_ADD] },
	{ "( " LOG_SCHEMA_OC ".6 NAME 'auditBind' "
		"DESC 'Bind operation' "
		"SUP auditObject STRUCTURAL "
		"MUST ( reqVersion $ reqMethod ) )", &log_ocs[LOG_EN_BIND] },
	{ "( " LOG_SCHEMA_OC ".7 NAME 'auditCompare' "
		"DESC 'Compare operation' "
		"SUP auditReadObject STRUCTURAL "
		"MUST reqAssertion )", &log_ocs[LOG_EN_COMPARE] },
	{ "( " LOG_SCHEMA_OC ".8 NAME 'auditDelete' "
		"DESC 'Delete operation' "
		"SUP auditWriteObject STRUCTURAL "
		"MAY reqOld )", &log_ocs[LOG_EN_DELETE] },
	{ "( " LOG_SCHEMA_OC ".9 NAME 'auditModify' "
		"DESC 'Modify operation' "
		"SUP auditWriteObject STRUCTURAL "
		"MAY reqOld MUST reqMod )", &log_ocs[LOG_EN_MODIFY] },
	{ "( " LOG_SCHEMA_OC ".10 NAME 'auditModRDN' "
		"DESC 'ModRDN operation' "
		"SUP auditWriteObject STRUCTURAL "
		"MUST ( reqNewRDN $ reqDeleteOldRDN ) "
		"MAY reqNewSuperior )", &log_ocs[LOG_EN_MODRDN] },
	{ "( " LOG_SCHEMA_OC ".11 NAME 'auditSearch' "
		"DESC 'Search operation' "
		"SUP auditReadObject STRUCTURAL "
		"MUST ( reqScope $ reqDerefAliases $ reqAttrsonly ) "
		"MAY ( reqFilter $ reqAttr $ reqEntries $ reqSizeLimit $ "
			"reqTimeLimit ) )", &log_ocs[LOG_EN_SEARCH] },
	{ "( " LOG_SCHEMA_OC ".12 NAME 'auditExtended' "
		"DESC 'Extended operation' "
		"SUP auditObject STRUCTURAL "
		"MAY reqData )", &log_ocs[LOG_EN_EXTENDED] },
	{ NULL, NULL }
};

#define	RDNEQ	"reqStart="

/* Our time intervals are of the form [ddd+]hh:mm[:ss]
 * If a field is present, it must be two digits. (Except for
 * days, which can be arbitrary width.)
 */
static int
log_age_parse(char *agestr)
{
	int t1, t2;
	int gotdays = 0;
	char *endptr;

	t1 = strtol( agestr, &endptr, 10 );
	/* Is there a days delimiter? */
	if ( *endptr == '+' ) {
		/* 32 bit time only covers about 68 years */
		if ( t1 < 0 || t1 > 25000 )
			return -1;
		t1 *= 24;
		gotdays = 1;
		agestr = endptr + 1;
	} else {
		if ( agestr[2] != ':' ) {
			/* No valid delimiter found, fail */
			return -1;
		}
		t1 *= 60;
		agestr += 3;
	}

	t2 = atoi( agestr );
	t1 += t2;

	if ( agestr[2] ) {
		/* if there's a delimiter, it can only be a colon */
		if ( agestr[2] != ':' )
			return -1;
	} else {
		/* If we're at the end of the string, and we started with days,
		 * fail because we expected to find minutes too.
		 */
		return gotdays ? -1 : t1 * 60;
	}

	agestr += 3;
	t2 = atoi( agestr );

	/* last field can only be seconds */
	if ( agestr[2] && ( agestr[2] != ':' || !gotdays ))
		return -1;
	t1 *= 60;
	t1 += t2;

	if ( agestr[2] ) {
		agestr += 3;
		if ( agestr[2] )
			return -1;
		t1 *= 60;
		t1 += atoi( agestr );
	} else if ( gotdays ) {
		/* only got days+hh:mm */
		t1 *= 60;
	}
	return t1;
}

static void
log_age_unparse( int age, struct berval *agebv )
{
	int dd, hh, mm, ss;
	char *ptr;

	ss = age % 60;
	age /= 60;
	mm = age % 60;
	age /= 60;
	hh = age % 24;
	age /= 24;
	dd = age;

	ptr = agebv->bv_val;

	if ( dd ) 
		ptr += sprintf( ptr, "%d+", dd );
	ptr += sprintf( ptr, "%02d:%02d", hh, mm );
	if ( ss )
		ptr += sprintf( ptr, ":%02d", ss );

	agebv->bv_len = ptr - agebv->bv_val;
}

static slap_callback nullsc = { NULL, NULL, NULL, NULL };

#define PURGE_INCREMENT	100

typedef struct purge_data {
	int slots;
	int used;
	BerVarray dn;
	BerVarray ndn;
	struct berval csn;	/* an arbitrary old CSN */
} purge_data;

static int
log_old_lookup( Operation *op, SlapReply *rs )
{
	purge_data *pd = op->o_callback->sc_private;

	if ( rs->sr_type != REP_SEARCH) return 0;

	if ( slapd_shutdown ) return 0;

	/* Remember old CSN */
	if ( pd->csn.bv_val[0] == '\0' ) {
		Attribute *a = attr_find( rs->sr_entry->e_attrs,
			slap_schema.si_ad_entryCSN );
		if ( a ) {
			int len = a->a_vals[0].bv_len;
			if ( len > pd->csn.bv_len )
				len = pd->csn.bv_len;
			AC_MEMCPY( pd->csn.bv_val, a->a_vals[0].bv_val, len );
			pd->csn.bv_len = len;
		}
	}
	if ( pd->used >= pd->slots ) {
		pd->slots += PURGE_INCREMENT;
		pd->dn = ch_realloc( pd->dn, pd->slots * sizeof( struct berval ));
		pd->ndn = ch_realloc( pd->ndn, pd->slots * sizeof( struct berval ));
	}
	ber_dupbv( &pd->dn[pd->used], &rs->sr_entry->e_name );
	ber_dupbv( &pd->ndn[pd->used], &rs->sr_entry->e_nname );
	pd->used++;
	return 0;
}

/* Periodically search for old entries in the log database and delete them */
static void *
accesslog_purge( void *ctx, void *arg )
{
	struct re_s *rtask = arg;
	struct log_info *li = rtask->arg;

	Connection conn = {0};
	OperationBuffer opbuf;
	Operation *op = (Operation *) &opbuf;
	SlapReply rs = {REP_RESULT};
	slap_callback cb = { NULL, log_old_lookup, NULL, NULL };
	Filter f;
	AttributeAssertion ava = {0};
	purge_data pd = {0};
	char timebuf[LDAP_LUTIL_GENTIME_BUFSIZE];
	char csnbuf[LDAP_LUTIL_CSNSTR_BUFSIZE];
	time_t old = slap_get_time();

	connection_fake_init( &conn, op, ctx );

	f.f_choice = LDAP_FILTER_LE;
	f.f_ava = &ava;
	f.f_next = NULL;

	ava.aa_desc = ad_reqStart;
	ava.aa_value.bv_val = timebuf;
	ava.aa_value.bv_len = sizeof(timebuf);

	old -= li->li_age;
	slap_timestamp( &old, &ava.aa_value );

	op->o_tag = LDAP_REQ_SEARCH;
	op->o_bd = li->li_db;
	op->o_dn = li->li_db->be_rootdn;
	op->o_ndn = li->li_db->be_rootndn;
	op->o_req_dn = li->li_db->be_suffix[0];
	op->o_req_ndn = li->li_db->be_nsuffix[0];
	op->o_callback = &cb;
	op->ors_scope = LDAP_SCOPE_ONELEVEL;
	op->ors_deref = LDAP_DEREF_NEVER;
	op->ors_tlimit = SLAP_NO_LIMIT;
	op->ors_slimit = SLAP_NO_LIMIT;
	op->ors_filter = &f;
	filter2bv_x( op, &f, &op->ors_filterstr );
	op->ors_attrs = slap_anlist_no_attrs;
	op->ors_attrsonly = 1;
	
	pd.csn.bv_len = sizeof( csnbuf );
	pd.csn.bv_val = csnbuf;
	csnbuf[0] = '\0';
	cb.sc_private = &pd;

	op->o_bd->be_search( op, &rs );
	op->o_tmpfree( op->ors_filterstr.bv_val, op->o_tmpmemctx );

	if ( pd.used ) {
		int i;

		op->o_tag = LDAP_REQ_DELETE;
		op->o_callback = &nullsc;
		op->o_csn = pd.csn;

		for (i=0; i<pd.used; i++) {
			op->o_req_dn = pd.dn[i];
			op->o_req_ndn = pd.ndn[i];
			if ( !slapd_shutdown )
				op->o_bd->be_delete( op, &rs );
			ch_free( pd.ndn[i].bv_val );
			ch_free( pd.dn[i].bv_val );
		}
		ch_free( pd.ndn );
		ch_free( pd.dn );
	}

	ldap_pvt_thread_mutex_lock( &slapd_rq.rq_mutex );
	ldap_pvt_runqueue_stoptask( &slapd_rq, rtask );
	ldap_pvt_thread_mutex_unlock( &slapd_rq.rq_mutex );

	return NULL;
}

static int
log_cf_gen(ConfigArgs *c)
{
	slap_overinst *on = (slap_overinst *)c->bi;
	struct log_info *li = on->on_bi.bi_private;
	int rc = 0;
	slap_mask_t tmask = 0;
	char agebuf[2*STRLENOF("ddddd+hh:mm:ss  ")];
	struct berval agebv, cyclebv;

	switch( c->op ) {
	case SLAP_CONFIG_EMIT:
		switch( c->type ) {
		case LOG_DB:
			if ( li->li_db == NULL ) {
				snprintf( c->msg, sizeof( c->msg ),
					"accesslog: \"logdb <suffix>\" must be specified" );
				Debug( LDAP_DEBUG_ANY, "%s: %s \"%s\"\n",
					c->log, c->msg, c->value_dn.bv_val );
				rc = 1;
				break;
			}
			value_add( &c->rvalue_vals, li->li_db->be_suffix );
			value_add( &c->rvalue_nvals, li->li_db->be_nsuffix );
			break;
		case LOG_OPS:
			rc = mask_to_verbs( logops, li->li_ops, &c->rvalue_vals );
			break;
		case LOG_PURGE:
			if ( !li->li_age ) {
				rc = 1;
				break;
			}
			agebv.bv_val = agebuf;
			log_age_unparse( li->li_age, &agebv );
			agebv.bv_val[agebv.bv_len] = ' ';
			agebv.bv_len++;
			cyclebv.bv_val = agebv.bv_val + agebv.bv_len;
			log_age_unparse( li->li_cycle, &cyclebv );
			agebv.bv_len += cyclebv.bv_len;
			value_add_one( &c->rvalue_vals, &agebv );
			break;
		case LOG_SUCCESS:
			if ( li->li_success )
				c->value_int = li->li_success;
			else
				rc = 1;
			break;
		case LOG_OLD:
			if ( li->li_oldf ) {
				filter2bv( li->li_oldf, &agebv );
				ber_bvarray_add( &c->rvalue_vals, &agebv );
			}
			else
				rc = 1;
			break;
		}
		break;
	case LDAP_MOD_DELETE:
		switch( c->type ) {
		case LOG_DB:
			/* noop. this should always be a valid backend. */
			break;
		case LOG_OPS:
			if ( c->valx < 0 ) {
				li->li_ops = 0;
			} else {
				rc = verbs_to_mask( 1, &c->line, logops, &tmask );
				if ( rc == 0 )
					li->li_ops &= ~tmask;
			}
			break;
		case LOG_PURGE:
			if ( li->li_task ) {
				struct re_s *re = li->li_task;
				li->li_task = NULL;
				if ( ldap_pvt_runqueue_isrunning( &slapd_rq, re ))
					ldap_pvt_runqueue_stoptask( &slapd_rq, re );
				ldap_pvt_runqueue_remove( &slapd_rq, re );
			}
			li->li_age = 0;
			li->li_cycle = 0;
			break;
		case LOG_SUCCESS:
			li->li_success = 0;
			break;
		case LOG_OLD:
			if ( li->li_oldf ) {
				filter_free( li->li_oldf );
				li->li_oldf = NULL;
			}
			break;
		}
		break;
	default:
		switch( c->type ) {
		case LOG_DB:
			li->li_db = select_backend( &c->value_ndn, 0, 0 );
			if ( !li->li_db ) {
				snprintf( c->msg, sizeof( c->msg ),
					"<%s> no matching backend found for suffix",
					c->argv[0] );
				Debug( LDAP_DEBUG_ANY, "%s: %s \"%s\"\n",
					c->log, c->msg, c->value_dn.bv_val );
				rc = 1;
			} else if ( BER_BVISEMPTY( &li->li_db->be_rootdn )) {
				snprintf( c->msg, sizeof( c->msg ),
						"<%s> no rootDN was configured for suffix",
						c->argv[0] );
				Debug( LDAP_DEBUG_ANY, "%s: %s \"%s\"\n",
						c->log, c->msg, c->value_dn.bv_val );
				rc = 1;
			}
			ch_free( c->value_dn.bv_val );
			ch_free( c->value_ndn.bv_val );
			break;
		case LOG_OPS:
			rc = verbs_to_mask( c->argc, c->argv, logops, &tmask );
			if ( rc == 0 )
				li->li_ops |= tmask;
			break;
		case LOG_PURGE:
			li->li_age = log_age_parse( c->argv[1] );
			if ( li->li_age < 1 ) {
				rc = 1;
			} else {
				li->li_cycle = log_age_parse( c->argv[2] );
				if ( li->li_cycle < 1 ) {
					rc = 1;
				} else if ( slapMode & SLAP_SERVER_MODE ) {
					struct re_s *re = li->li_task;
					if ( re )
						re->interval.tv_sec = li->li_cycle;
					else
						li->li_task = ldap_pvt_runqueue_insert( &slapd_rq,
							li->li_cycle, accesslog_purge, li,
							"accesslog_purge", li->li_db ?
								li->li_db->be_suffix[0].bv_val :
								c->be->be_suffix[0].bv_val );
				}
			}
			break;
		case LOG_SUCCESS:
			li->li_success = c->value_int;
			break;
		case LOG_OLD:
			li->li_oldf = str2filter( c->argv[1] );
			if ( !li->li_oldf ) {
				sprintf( c->msg, "bad filter!" );
				rc = 1;
			}
		}
		break;
	}
	return rc;
}

static Entry *accesslog_entry( Operation *op, int logop,
	Operation *op2 ) {
	slap_overinst *on = (slap_overinst *)op->o_bd->bd_info;
	log_info *li = on->on_bi.bi_private;

	char rdnbuf[STRLENOF(RDNEQ)+LDAP_LUTIL_GENTIME_BUFSIZE+8];
	char nrdnbuf[STRLENOF(RDNEQ)+LDAP_LUTIL_GENTIME_BUFSIZE+8];

	struct berval rdn, nrdn, timestamp, ntimestamp, bv;
	slap_verbmasks *lo = logops+logop+EN_OFFSET;

	Entry *e = ch_calloc( 1, sizeof(Entry) );

	strcpy( rdnbuf, RDNEQ );
	rdn.bv_val = rdnbuf;
	strcpy( nrdnbuf, RDNEQ );
	nrdn.bv_val = nrdnbuf;

	timestamp.bv_val = rdnbuf+STRLENOF(RDNEQ);
	timestamp.bv_len = sizeof(rdnbuf) - STRLENOF(RDNEQ);
	slap_timestamp( &op->o_time, &timestamp );
	sprintf( timestamp.bv_val + timestamp.bv_len-1, ".%06dZ", op->o_tincr );
	timestamp.bv_len += 7;

	rdn.bv_len = STRLENOF(RDNEQ)+timestamp.bv_len;
	ad_reqStart->ad_type->sat_equality->smr_normalize(
		SLAP_MR_VALUE_OF_ASSERTION_SYNTAX, ad_reqStart->ad_type->sat_syntax,
		ad_reqStart->ad_type->sat_equality, &timestamp, &ntimestamp,
		op->o_tmpmemctx );

	strcpy( nrdn.bv_val + STRLENOF(RDNEQ), ntimestamp.bv_val );
	nrdn.bv_len = STRLENOF(RDNEQ)+ntimestamp.bv_len;
	build_new_dn( &e->e_name, li->li_db->be_suffix, &rdn, NULL );
	build_new_dn( &e->e_nname, li->li_db->be_nsuffix, &nrdn, NULL );

	attr_merge_one( e, slap_schema.si_ad_objectClass,
		&log_ocs[logop]->soc_cname, NULL );
	attr_merge_one( e, slap_schema.si_ad_structuralObjectClass,
		&log_ocs[logop]->soc_cname, NULL );
	attr_merge_one( e, ad_reqStart, &timestamp, &ntimestamp );
	op->o_tmpfree( ntimestamp.bv_val, op->o_tmpmemctx );

	slap_op_time( &op2->o_time, &op2->o_tincr );

	timestamp.bv_len = sizeof(rdnbuf) - STRLENOF(RDNEQ);
	slap_timestamp( &op2->o_time, &timestamp );
	sprintf( timestamp.bv_val + timestamp.bv_len-1, ".%06dZ", op2->o_tincr );
	timestamp.bv_len += 7;

	attr_merge_normalize_one( e, ad_reqEnd, &timestamp, op->o_tmpmemctx );

	/* Exops have OID appended */
	if ( logop == LOG_EN_EXTENDED ) {
		bv.bv_len = lo->word.bv_len + op->ore_reqoid.bv_len + 2;
		bv.bv_val = ch_malloc( bv.bv_len + 1 );
		AC_MEMCPY( bv.bv_val, lo->word.bv_val, lo->word.bv_len );
		bv.bv_val[lo->word.bv_len] = '{';
		AC_MEMCPY( bv.bv_val+lo->word.bv_len+1, op->ore_reqoid.bv_val,
			op->ore_reqoid.bv_len );
		bv.bv_val[bv.bv_len-1] = '}';
		bv.bv_val[bv.bv_len] = '\0';
		attr_merge_one( e, ad_reqType, &bv, NULL );
	} else {
		attr_merge_one( e, ad_reqType, &lo->word, NULL );
	}

	rdn.bv_len = sprintf( rdn.bv_val, "%lu", op->o_connid );
	attr_merge_one( e, ad_reqSession, &rdn, NULL );

	if ( BER_BVISNULL( &op->o_dn )) 
		attr_merge_one( e, ad_reqAuthzID, (struct berval *)&slap_empty_bv,
			(struct berval *)&slap_empty_bv );
	else
		attr_merge_one( e, ad_reqAuthzID, &op->o_dn, &op->o_ndn );

	/* FIXME: need to add reqControls and reqRespControls */

	return e;
}

static struct berval scopes[] = {
	BER_BVC("base"),
	BER_BVC("one"),
	BER_BVC("sub"),
	BER_BVC("subord")
};

static struct berval derefs[] = {
	BER_BVC("never"),
	BER_BVC("searching"),
	BER_BVC("finding"),
	BER_BVC("always")
};

static struct berval simple = BER_BVC("SIMPLE");

static void accesslog_val2val(AttributeDescription *ad, struct berval *val,
	char c_op, struct berval *dst) {
	char *ptr;

	dst->bv_len = ad->ad_cname.bv_len + val->bv_len + 2;
	if ( c_op ) dst->bv_len++;

	dst->bv_val = ch_malloc( dst->bv_len+1 );

	ptr = lutil_strcopy( dst->bv_val, ad->ad_cname.bv_val );
	*ptr++ = ':';
	if ( c_op )
		*ptr++ = c_op;
	*ptr++ = ' ';
	AC_MEMCPY( ptr, val->bv_val, val->bv_len );
	dst->bv_val[dst->bv_len] = '\0';
}

static int accesslog_response(Operation *op, SlapReply *rs) {
	slap_overinst *on = (slap_overinst *)op->o_bd->bd_info;
	log_info *li = on->on_bi.bi_private;
	Attribute *a, *last_attr;
	Modifications *m;
	struct berval *b;
	int i;
	int logop;
	slap_verbmasks *lo;
	Entry *e = NULL, *old = NULL;
	char timebuf[LDAP_LUTIL_GENTIME_BUFSIZE+8];
	struct berval bv;
	char *ptr;
	BerVarray vals;
	Operation op2 = {0};
	SlapReply rs2 = {REP_RESULT};

	if ( rs->sr_type != REP_RESULT && rs->sr_type != REP_EXTENDED )
		return SLAP_CB_CONTINUE;

	switch ( op->o_tag ) {
	case LDAP_REQ_ADD:		logop = LOG_EN_ADD; break;
	case LDAP_REQ_DELETE:	logop = LOG_EN_DELETE; break;
	case LDAP_REQ_MODIFY:	logop = LOG_EN_MODIFY; break;
	case LDAP_REQ_MODRDN:	logop = LOG_EN_MODRDN; break;
	case LDAP_REQ_COMPARE:	logop = LOG_EN_COMPARE; break;
	case LDAP_REQ_SEARCH:	logop = LOG_EN_SEARCH; break;
	case LDAP_REQ_BIND:		logop = LOG_EN_BIND; break;
	case LDAP_REQ_EXTENDED:	logop = LOG_EN_EXTENDED; break;
	default:	/* unknown operation type */
		logop = LOG_EN_UNKNOWN; break;
	}	/* Unbind and Abandon never reach here */

	lo = logops+logop+EN_OFFSET;
	if ( !( li->li_ops & lo->mask ))
		return SLAP_CB_CONTINUE;

	if ( lo->mask & LOG_OP_WRITES ) {
		slap_callback *cb;
		ldap_pvt_thread_mutex_lock( &li->li_log_mutex );
		old = li->li_old;
		li->li_old = NULL;
		/* Disarm mod_cleanup */
		for ( cb = op->o_callback; cb; cb = cb->sc_next ) {
			if ( cb->sc_private == (void *)on ) {
				cb->sc_private = NULL;
				break;
			}
		}
		ldap_pvt_thread_mutex_unlock( &li->li_op_mutex );
	}

	if ( li->li_success && rs->sr_err != LDAP_SUCCESS )
		goto done;

	e = accesslog_entry( op, logop, &op2 );

	attr_merge_one( e, ad_reqDN, &op->o_req_dn, &op->o_req_ndn );

	if ( rs->sr_text ) {
		ber_str2bv( rs->sr_text, 0, 0, &bv );
		attr_merge_one( e, ad_reqMessage, &bv, NULL );
	}
	bv.bv_len = sprintf( timebuf, "%d", rs->sr_err );
	bv.bv_val = timebuf;

	attr_merge_one( e, ad_reqResult, &bv, NULL );

	last_attr = attr_find( e->e_attrs, ad_reqResult );

	switch( logop ) {
	case LOG_EN_ADD:
	case LOG_EN_DELETE: {
		char c_op;
		Entry *e2;

		if ( logop == LOG_EN_ADD ) {
			e2 = op->ora_e;
			c_op = '+';
		} else {
			if ( !old )
				break;
			e2 = old;
			c_op = 0;
		}
		/* count all the vals */
		i = 0;
		for ( a=e2->e_attrs; a; a=a->a_next ) {
			if ( a->a_vals ) {
				for (b=a->a_vals; !BER_BVISNULL( b ); b++) {
					i++;
				}
			}
		}
		vals = ch_malloc( (i+1) * sizeof( struct berval ));
		i = 0;
		for ( a=e2->e_attrs; a; a=a->a_next ) {
			if ( a->a_vals ) {
				for (b=a->a_vals; !BER_BVISNULL( b ); b++,i++) {
					accesslog_val2val( a->a_desc, b, c_op, &vals[i] );
				}
			}
		}
		vals[i].bv_val = NULL;
		vals[i].bv_len = 0;
		a = attr_alloc( logop == LOG_EN_ADD ? ad_reqMod : ad_reqOld );
		a->a_vals = vals;
		a->a_nvals = vals;
		last_attr->a_next = a;
		break;
	}

	case LOG_EN_MODIFY:
		/* count all the mods */
		i = 0;
		for ( m=op->orm_modlist; m; m=m->sml_next ) {
			if ( m->sml_values ) {
				for (b=m->sml_values; !BER_BVISNULL( b ); b++) {
					i++;
				}
			} else if ( m->sml_op == LDAP_MOD_DELETE ||
				m->sml_op == LDAP_MOD_REPLACE ) {
				i++;
			}
		}
		vals = ch_malloc( (i+1) * sizeof( struct berval ));
		i = 0;

		/* Zero flags on old entry */
		if ( old ) {
			for ( a=old->e_attrs; a; a=a->a_next )
				a->a_flags = 0;
		}

		for ( m=op->orm_modlist; m; m=m->sml_next ) {
			/* Mark this attribute as modified */
			if ( old ) {
				a = attr_find( old->e_attrs, m->sml_desc );
				if ( a )
					a->a_flags = 1;
			}
			if ( m->sml_values ) {
				for (b=m->sml_values; !BER_BVISNULL( b ); b++,i++) {
					char c_op;

					switch( m->sml_op ) {
					case LDAP_MOD_ADD: c_op = '+'; break;
					case LDAP_MOD_DELETE:	c_op = '-'; break;
					case LDAP_MOD_REPLACE:	c_op = '='; break;
					case LDAP_MOD_INCREMENT:	c_op = '#'; break;

					/* unknown op. there shouldn't be any of these. we
					 * don't know what to do with it, but we shouldn't just
					 * ignore it.
					 */
					default: c_op = '?'; break;
					}
					accesslog_val2val( m->sml_desc, b, c_op, &vals[i] );
				}
			} else if ( m->sml_op == LDAP_MOD_DELETE ||
				m->sml_op == LDAP_MOD_REPLACE ) {
				vals[i].bv_len = m->sml_desc->ad_cname.bv_len + 2;
				vals[i].bv_val = ch_malloc( vals[i].bv_len+1 );
				ptr = lutil_strcopy( vals[i].bv_val,
					m->sml_desc->ad_cname.bv_val );
				*ptr++ = ':';
				if ( m->sml_op == LDAP_MOD_DELETE )
					*ptr++ = '-';
				else
					*ptr++ = '=';
				*ptr = '\0';
				i++;
			}
		}
		vals[i].bv_val = NULL;
		vals[i].bv_len = 0;
		a = attr_alloc( ad_reqMod );
		a->a_vals = vals;
		a->a_nvals = vals;
		last_attr->a_next = a;

		if ( old ) {
			last_attr = a;
			/* count all the vals */
			i = 0;
			for ( a=old->e_attrs; a; a=a->a_next ) {
				if ( a->a_vals && a->a_flags ) {
					for (b=a->a_vals; !BER_BVISNULL( b ); b++) {
					i++;
					}
				}
			}
			vals = ch_malloc( (i+1) * sizeof( struct berval ));
			i = 0;
			for ( a=old->e_attrs; a; a=a->a_next ) {
				if ( a->a_vals && a->a_flags ) {
					for (b=a->a_vals; !BER_BVISNULL( b ); b++,i++) {
						accesslog_val2val( a->a_desc, b, 0, &vals[i] );
					}
				}
			}
			vals[i].bv_val = NULL;
			vals[i].bv_len = 0;
			a = attr_alloc( ad_reqOld );
			a->a_vals = vals;
			a->a_nvals = vals;
			last_attr->a_next = a;
		}
		break;

	case LOG_EN_MODRDN:
		attr_merge_one( e, ad_reqNewRDN, &op->orr_newrdn, &op->orr_nnewrdn );
		attr_merge_one( e, ad_reqDeleteOldRDN, op->orr_deleteoldrdn ?
			(struct berval *)&slap_true_bv : (struct berval *)&slap_false_bv,
			NULL );
		if ( op->orr_newSup ) {
			attr_merge_one( e, ad_reqNewSuperior, op->orr_newSup, op->orr_nnewSup );
		}
		break;

	case LOG_EN_COMPARE:
		bv.bv_len = op->orc_ava->aa_desc->ad_cname.bv_len + 1 +
			op->orc_ava->aa_value.bv_len;
		bv.bv_val = op->o_tmpalloc( bv.bv_len+1, op->o_tmpmemctx );
		ptr = lutil_strcopy( bv.bv_val, op->orc_ava->aa_desc->ad_cname.bv_val );
		*ptr++ = '=';
		AC_MEMCPY( ptr, op->orc_ava->aa_value.bv_val, op->orc_ava->aa_value.bv_len );
		bv.bv_val[bv.bv_len] = '\0';
		attr_merge_one( e, ad_reqAssertion, &bv, NULL );
		op->o_tmpfree( bv.bv_val, op->o_tmpmemctx );
		break;

	case LOG_EN_SEARCH:
		attr_merge_one( e, ad_reqScope, &scopes[op->ors_scope], NULL );
		attr_merge_one( e, ad_reqDerefAliases, &derefs[op->ors_deref], NULL );
		attr_merge_one( e, ad_reqAttrsOnly, op->ors_attrsonly ?
			(struct berval *)&slap_true_bv : (struct berval *)&slap_false_bv,
			NULL );
		if ( !BER_BVISEMPTY( &op->ors_filterstr ))
			attr_merge_one( e, ad_reqFilter, &op->ors_filterstr, NULL );
		if ( op->ors_attrs ) {
			/* count them */
			for (i=0; !BER_BVISNULL(&op->ors_attrs[i].an_name );i++)
				;
			vals = op->o_tmpalloc( (i+1) * sizeof(struct berval),
				op->o_tmpmemctx );
			for (i=0; !BER_BVISNULL(&op->ors_attrs[i].an_name );i++)
				vals[i] = op->ors_attrs[i].an_name;
			vals[i].bv_val = NULL;
			vals[i].bv_len = 0;
			attr_merge( e, ad_reqAttr, vals, NULL );
			op->o_tmpfree( vals, op->o_tmpmemctx );
		}
		bv.bv_val = timebuf;
		bv.bv_len = sprintf( bv.bv_val, "%d", rs->sr_nentries );
		attr_merge_one( e, ad_reqEntries, &bv, NULL );

		bv.bv_len = sprintf( bv.bv_val, "%d", op->ors_tlimit );
		attr_merge_one( e, ad_reqTimeLimit, &bv, NULL );

		bv.bv_len = sprintf( bv.bv_val, "%d", op->ors_slimit );
		attr_merge_one( e, ad_reqSizeLimit, &bv, NULL );
		break;

	case LOG_EN_BIND:
		bv.bv_val = timebuf;
		bv.bv_len = sprintf( bv.bv_val, "%d", op->o_protocol );
		attr_merge_one( e, ad_reqVersion, &bv, NULL );
		if ( op->orb_method == LDAP_AUTH_SIMPLE ) {
			attr_merge_one( e, ad_reqMethod, &simple, NULL );
		} else {
			bv.bv_len = STRLENOF("SASL()") + op->orb_tmp_mech.bv_len;
			bv.bv_val = op->o_tmpalloc( bv.bv_len + 1, op->o_tmpmemctx );
			ptr = lutil_strcopy( bv.bv_val, "SASL(" );
			ptr = lutil_strcopy( ptr, op->orb_tmp_mech.bv_val );
			*ptr++ = ')';
			*ptr = '\0';
			attr_merge_one( e, ad_reqMethod, &bv, NULL );
			op->o_tmpfree( bv.bv_val, op->o_tmpmemctx );
		}

		break;

	case LOG_EN_EXTENDED:
		if ( op->ore_reqdata ) {
			attr_merge_one( e, ad_reqData, op->ore_reqdata, NULL );
		}
		break;

	case LOG_EN_UNKNOWN:
		/* we don't know its parameters, don't add any */
		break;
	}

	op2.o_hdr = op->o_hdr;
	op2.o_tag = LDAP_REQ_ADD;
	op2.o_bd = li->li_db;
	op2.o_dn = li->li_db->be_rootdn;
	op2.o_ndn = li->li_db->be_rootndn;
	op2.o_req_dn = e->e_name;
	op2.o_req_ndn = e->e_nname;
	op2.ora_e = e;
	op2.o_callback = &nullsc;

	if (( lo->mask & LOG_OP_WRITES ) && !BER_BVISEMPTY( &op->o_csn )) {
		slap_queue_csn( &op2, &op->o_csn );
	}

	op2.o_bd->be_add( &op2, &rs2 );

done:
	if ( lo->mask & LOG_OP_WRITES )
		ldap_pvt_thread_mutex_unlock( &li->li_log_mutex );
	if ( e ) entry_free( e );
	if ( old ) entry_free( old );
	return SLAP_CB_CONTINUE;
}

/* Since Bind success is sent by the frontend, it won't normally enter
 * the overlay response callback. Add another callback to make sure it
 * gets here.
 */
static int
accesslog_bind_resp( Operation *op, SlapReply *rs )
{
	BackendDB *be, db;
	int rc;
	slap_callback *sc;

	be = op->o_bd;
	db = *be;
	op->o_bd = &db;
	db.bd_info = op->o_callback->sc_private;
	rc = accesslog_response( op, rs );
	op->o_bd = be;
	sc = op->o_callback;
	op->o_callback = sc->sc_next;
	op->o_tmpfree( sc, op->o_tmpmemctx );
	return rc;
}

static int
accesslog_op_bind( Operation *op, SlapReply *rs )
{
	slap_callback *sc;

	sc = op->o_tmpcalloc( 1, sizeof(slap_callback), op->o_tmpmemctx );
	sc->sc_response = accesslog_bind_resp;
	sc->sc_private = op->o_bd->bd_info;

	if ( op->o_callback ) {
		sc->sc_next = op->o_callback->sc_next;
		op->o_callback->sc_next = sc;
	} else {
		op->o_callback = sc;
	}
	return SLAP_CB_CONTINUE;
}

static int
accesslog_mod_cleanup( Operation *op, SlapReply *rs )
{
	slap_callback *sc = op->o_callback;
	slap_overinst *on = sc->sc_private;
	op->o_callback = sc->sc_next;

	op->o_tmpfree( sc, op->o_tmpmemctx );

	if ( on ) {
		BackendInfo *bi = op->o_bd->bd_info;
		op->o_bd->bd_info = (BackendInfo *)on;
		accesslog_response( op, rs );
		op->o_bd->bd_info = bi;
	}
	return 0;
}

static int
accesslog_op_mod( Operation *op, SlapReply *rs )
{
	slap_overinst *on = (slap_overinst *)op->o_bd->bd_info;
	log_info *li = on->on_bi.bi_private;

	if ( li->li_ops & LOG_OP_WRITES ) {
		slap_callback *cb = op->o_tmpalloc( sizeof( slap_callback ), op->o_tmpmemctx ), *cb2;
		cb->sc_cleanup = accesslog_mod_cleanup;
		cb->sc_response = NULL; 
		cb->sc_private = on;
		cb->sc_next = NULL;
		for ( cb2 = op->o_callback; cb2->sc_next; cb2 = cb2->sc_next );
		cb2->sc_next = cb;

		ldap_pvt_thread_mutex_lock( &li->li_op_mutex );
		if ( li->li_oldf && ( op->o_tag == LDAP_REQ_DELETE ||
			op->o_tag == LDAP_REQ_MODIFY )) {
			int rc;
			Entry *e;

			op->o_bd->bd_info = on->on_info->oi_orig;
			rc = be_entry_get_rw( op, &op->o_req_ndn, NULL, NULL, 0, &e );
			if ( e ) {
				if ( test_filter( op, e, li->li_oldf ) == LDAP_COMPARE_TRUE )
					li->li_old = entry_dup( e );
				be_entry_release_rw( op, e, 0 );
			}
			op->o_bd->bd_info = (BackendInfo *)on;
		}
	}
	return SLAP_CB_CONTINUE;
}

/* unbinds are broadcast to all backends; we only log it if this
 * backend was used for the original bind.
 */
static int
accesslog_unbind( Operation *op, SlapReply *rs )
{
	slap_overinst *on = (slap_overinst *)op->o_bd->bd_info;
	if ( op->o_conn->c_authz_backend == on->on_info->oi_origdb ) {
		log_info *li = on->on_bi.bi_private;
		Operation op2 = {0};
		void *cids[SLAP_MAX_CIDS];
		SlapReply rs2 = {REP_RESULT};
		Entry *e;

		if ( !( li->li_ops & LOG_OP_UNBIND ))
			return SLAP_CB_CONTINUE;

		e = accesslog_entry( op, LOG_EN_UNBIND, &op2 );
		op2.o_hdr = op->o_hdr;
		op2.o_tag = LDAP_REQ_ADD;
		op2.o_bd = li->li_db;
		op2.o_dn = li->li_db->be_rootdn;
		op2.o_ndn = li->li_db->be_rootndn;
		op2.o_req_dn = e->e_name;
		op2.o_req_ndn = e->e_nname;
		op2.ora_e = e;
		op2.o_callback = &nullsc;
		op2.o_controls = cids;
		memset(cids, 0, sizeof( cids ));

		op2.o_bd->be_add( &op2, &rs2 );
		entry_free( e );
	}
	return SLAP_CB_CONTINUE;
}

static int
accesslog_abandon( Operation *op, SlapReply *rs )
{
	slap_overinst *on = (slap_overinst *)op->o_bd->bd_info;
	log_info *li = on->on_bi.bi_private;
	Operation op2 = {0};
	void *cids[SLAP_MAX_CIDS];
	SlapReply rs2 = {REP_RESULT};
	Entry *e;
	char buf[64];
	struct berval bv;

	if ( !op->o_time || !( li->li_ops & LOG_OP_ABANDON ))
		return SLAP_CB_CONTINUE;

	e = accesslog_entry( op, LOG_EN_ABANDON, &op2 );
	bv.bv_val = buf;
	bv.bv_len = sprintf( buf, "%d", op->orn_msgid );
	attr_merge_one( e, ad_reqId, &bv, NULL );

	op2.o_hdr = op->o_hdr;
	op2.o_tag = LDAP_REQ_ADD;
	op2.o_bd = li->li_db;
	op2.o_dn = li->li_db->be_rootdn;
	op2.o_ndn = li->li_db->be_rootndn;
	op2.o_req_dn = e->e_name;
	op2.o_req_ndn = e->e_nname;
	op2.ora_e = e;
	op2.o_callback = &nullsc;
	op2.o_controls = cids;
	memset(cids, 0, sizeof( cids ));

	op2.o_bd->be_add( &op2, &rs2 );
	entry_free( e );

	return SLAP_CB_CONTINUE;
}

static slap_overinst accesslog;

static int
accesslog_db_init(
	BackendDB *be
)
{
	slap_overinst *on = (slap_overinst *)be->bd_info;
	log_info *li = ch_calloc(1, sizeof(log_info));

	on->on_bi.bi_private = li;
	ldap_pvt_thread_mutex_init( &li->li_op_mutex );
	ldap_pvt_thread_mutex_init( &li->li_log_mutex );
	return 0;
}

static int
accesslog_db_destroy(
	BackendDB *be
)
{
	slap_overinst *on = (slap_overinst *)be->bd_info;
	log_info *li = on->on_bi.bi_private;

	if ( li->li_oldf )
		filter_free( li->li_oldf );
	ldap_pvt_thread_mutex_destroy( &li->li_log_mutex );
	ldap_pvt_thread_mutex_destroy( &li->li_op_mutex );
	free( li );
	return LDAP_SUCCESS;
}

static int
accesslog_db_open(
	BackendDB *be
)
{
	slap_overinst *on = (slap_overinst *)be->bd_info;
	log_info *li = on->on_bi.bi_private;

	Connection conn;
	OperationBuffer opbuf;
	Operation *op = (Operation *) &opbuf;
	Entry *e;
	int rc;
	void *thrctx;

	if ( li->li_db == NULL ) {
		Debug( LDAP_DEBUG_ANY,
			"accesslog: \"logdb <suffix>\" must be specified.\n",
			0, 0, 0 );
		return 1;
	}

	if ( slapMode & SLAP_TOOL_MODE )
		return 0;

	thrctx = ldap_pvt_thread_pool_context();
	connection_fake_init( &conn, op, thrctx );
	op->o_bd = li->li_db;
	op->o_dn = li->li_db->be_rootdn;
	op->o_ndn = li->li_db->be_rootndn;

	rc = be_entry_get_rw( op, li->li_db->be_nsuffix, NULL, NULL, 0, &e );

	if ( e ) {
		be_entry_release_rw( op, e, 0 );
	} else {
		SlapReply rs = {REP_RESULT};
		struct berval rdn, nrdn, attr;
		char *ptr;
		AttributeDescription *ad = NULL;
		const char *text = NULL;
		Entry *e_ctx;

		e = ch_calloc( 1, sizeof( Entry ));
		e->e_name = *li->li_db->be_suffix;
		e->e_nname = *li->li_db->be_nsuffix;

		attr_merge_one( e, slap_schema.si_ad_objectClass,
			&log_container->soc_cname, NULL );

		dnRdn( &e->e_name, &rdn );
		dnRdn( &e->e_nname, &nrdn );
		ptr = ber_bvchr( &rdn, '=' );

		assert( ptr != NULL );

		attr.bv_val = rdn.bv_val;
		attr.bv_len = ptr - rdn.bv_val;

		slap_bv2ad( &attr, &ad, &text );

		rdn.bv_val = ptr+1;
		rdn.bv_len -= attr.bv_len + 1;
		ptr = ber_bvchr( &nrdn, '=' );
		nrdn.bv_len -= ptr - nrdn.bv_val + 1;
		nrdn.bv_val = ptr+1;
		attr_merge_one( e, ad, &rdn, &nrdn );

		/* Get contextCSN from main DB */
		op->o_bd = be;
		op->o_bd->bd_info = on->on_info->oi_orig;
		rc = be_entry_get_rw( op, be->be_nsuffix, NULL,
			slap_schema.si_ad_contextCSN, 0, &e_ctx );

		if ( e_ctx ) {
			Attribute *a;

			a = attr_find( e_ctx->e_attrs, slap_schema.si_ad_contextCSN );
			if ( a ) {
				attr_merge( e, slap_schema.si_ad_entryCSN, a->a_vals, NULL );
				attr_merge( e, a->a_desc, a->a_vals, NULL );
			}
			be_entry_release_rw( op, e_ctx, 0 );
		}
		op->o_bd->bd_info = (BackendInfo *)on;
		op->o_bd = li->li_db;

		op->ora_e = e;
		op->o_req_dn = e->e_name;
		op->o_req_ndn = e->e_nname;
		op->o_callback = &nullsc;
		SLAP_DBFLAGS( op->o_bd ) |= SLAP_DBFLAG_NOLASTMOD;
		rc = op->o_bd->be_add( op, &rs );
		SLAP_DBFLAGS( op->o_bd ) ^= SLAP_DBFLAG_NOLASTMOD;
		attrs_free( e->e_attrs );
		ch_free( e );
	}
	return rc;
}

int accesslog_initialize()
{
	int i, rc;

	accesslog.on_bi.bi_type = "accesslog";
	accesslog.on_bi.bi_db_init = accesslog_db_init;
	accesslog.on_bi.bi_db_destroy = accesslog_db_destroy;
	accesslog.on_bi.bi_db_open = accesslog_db_open;

	accesslog.on_bi.bi_op_add = accesslog_op_mod;
	accesslog.on_bi.bi_op_bind = accesslog_op_bind;
	accesslog.on_bi.bi_op_delete = accesslog_op_mod;
	accesslog.on_bi.bi_op_modify = accesslog_op_mod;
	accesslog.on_bi.bi_op_modrdn = accesslog_op_mod;
	accesslog.on_bi.bi_op_unbind = accesslog_unbind;
	accesslog.on_bi.bi_op_abandon = accesslog_abandon;
	accesslog.on_response = accesslog_response;

	accesslog.on_bi.bi_cf_ocs = log_cfocs;

	nullsc.sc_response = slap_null_cb;

	rc = config_register_schema( log_cfats, log_cfocs );
	if ( rc ) return rc;

	/* log schema integration */
	for ( i=0; lattrs[i].at; i++ ) {
		LDAPAttributeType *lat;
		AttributeType *at;
		int code;
		const char *err;

		lat = ldap_str2attributetype( lattrs[i].at, &code, &err,
			LDAP_SCHEMA_ALLOW_ALL );
		if ( !lat ) {
			Debug( LDAP_DEBUG_ANY, "accesslog_init: "
				"ldap_str2attributetype failed on %d: %s, %s\n",
				i, ldap_scherr2str(code), err );
			return -1;
		}
		code = at_add( lat, 0, &at, &err );
		ldap_memfree( lat );
		if ( code ) {
			Debug( LDAP_DEBUG_ANY, "log_back_initialize: "
				"at_add failed on %d: %s\n",
				i, scherr2str(code), 0 );
			return -1;
		}
		if ( slap_bv2ad( &at->sat_cname, lattrs[i].ad, &err )) {
			Debug( LDAP_DEBUG_ANY, "accesslog_init: "
				"slap_bv2ad failed on %d: %s\n",
				i, err, 0 );
			return -1;
		}
	}
	for ( i=0; locs[i].ot; i++ ) {
		LDAPObjectClass *loc;
		ObjectClass *oc;
		int code;
		const char *err;

		loc = ldap_str2objectclass( locs[i].ot, &code, &err,
			LDAP_SCHEMA_ALLOW_ALL );
		if ( !loc ) {
			Debug( LDAP_DEBUG_ANY, "accesslog_init: "
				"ldap_str2objectclass failed on %d: %s, %s\n",
				i, ldap_scherr2str(code), err );
			return -1;
		}
		
		code = oc_add( loc, 0, &oc, &err );
		ldap_memfree( loc );
		if ( code ) {
			Debug( LDAP_DEBUG_ANY, "accesslog_init: "
				"oc_add failed on %d: %s\n",
				i, scherr2str(code), 0 );
			return -1;
		}
		if ( locs[i].oc )
			*locs[i].oc = oc;
	}

	return overlay_register(&accesslog);
}

#if SLAPD_OVER_ACCESSLOG == SLAPD_MOD_DYNAMIC
int
init_module( int argc, char *argv[] )
{
	return accesslog_initialize();
}
#endif

#endif /* SLAPD_OVER_ACCESSLOG */
