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accesslog.c

/* accesslog.c - log operations for audit/history purposes */
/* $OpenLDAP: pkg/ldap/servers/slapd/overlays/accesslog.c,v 1.37.2.17 2008/05/01 20:37:48 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_attr {
      struct log_attr *next;
      AttributeDescription *attr;
} log_attr;

typedef struct log_info {
      BackendDB *li_db;
      struct berval li_db_suffix;
      slap_mask_t li_ops;
      int li_age;
      int li_cycle;
      struct re_s *li_task;
      Filter *li_oldf;
      Entry *li_old;
      log_attr *li_oldattrs;
      int li_success;
      ldap_pvt_thread_rmutex_t li_op_rmutex;
      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,
      LOG_OLDATTR
};

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 },
      { "logoldattr", "attrs", 2, 0, 0, ARG_MAGIC|LOG_OLDATTR,
            log_cf_gen, "( OLcfgOvAt:4.6 NAME 'olcAccessLogOldAttr' "
                  "DESC 'Log old values of these attributes even if unmodified' "
                  "EQUALITY caseIgnoreMatch "
                  "SYNTAX OMsDirectoryString )", 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 $ olcAccessLogOldAttr ) )",
                  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,
      *log_oc_read, *log_oc_write;

#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"
#define LOG_SCHEMA_SYN LOG_SCHEMA_ROOT ".3"

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, *ad_auditContext;

static int
logSchemaControlValidate(
      Syntax            *syntax,
      struct berval     *val );

char  *mrControl[] = {
      "objectIdentifierFirstComponentMatch",
      NULL
};

static struct {
      char              *oid;
      slap_syntax_defs_rec    syn;
      char              **mrs;
} lsyntaxes[] = {
      { LOG_SCHEMA_SYN ".1" ,
            { "( " LOG_SCHEMA_SYN ".1 DESC 'Control' )",
                  SLAP_SYNTAX_HIDE,
                  NULL,
                  logSchemaControlValidate,
                  NULL },
            mrControl },
      { NULL }
};

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' "
            "EQUALITY objectIdentifierFirstComponentMatch "
            "SYNTAX " LOG_SCHEMA_SYN ".1 "
            "X-ORDERED 'VALUES' )", &ad_reqControls },
      { "( " LOG_SCHEMA_AT ".11 NAME 'reqRespControls' "
            "DESC 'Response controls of request' "
            "EQUALITY objectIdentifierFirstComponentMatch "
            "SYNTAX " LOG_SCHEMA_SYN ".1 "
            "X-ORDERED 'VALUES' )", &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 },

      /*
       * from <draft-chu-ldap-logschema-01.txt>:
       *

   ( LOG_SCHEMA_AT .30 NAME 'auditContext'
   DESC 'DN of auditContainer'
   EQUALITY distinguishedNameMatch
   SYNTAX 1.3.6.1.4.1.1466.115.121.1.12
   SINGLE-VALUE NO-USER-MODIFICATION USAGE directoryOperation )

       * - removed EQUALITY matchingRule
       * - changed directoryOperation in dSAOperation
       */
      { "( " LOG_SCHEMA_AT ".30 NAME 'auditContext' "
            "DESC 'DN of auditContainer' "
            "SYNTAX 1.3.6.1.4.1.1466.115.121.1.12 "
            "SINGLE-VALUE "
            "NO-USER-MODIFICATION "
            "USAGE dSAOperation )", &ad_auditContext },
      { 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 )", &log_oc_read },
      { "( " LOG_SCHEMA_OC ".3 NAME 'auditWriteObject' "
            "DESC 'OpenLDAP write request record' "
            "SUP auditObject STRUCTURAL )", &log_oc_write },
      { "( " 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 $ reqMod $ reqOld ) )", &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, size_t size )
{
      int dd, hh, mm, ss, len;
      char *ptr;

      assert( size > 0 );

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

      ptr = agebv->bv_val;

      if ( dd ) {
            len = snprintf( ptr, size, "%d+", dd );
            assert( len >= 0 && len < size );
            size -= len;
            ptr += len;
      }
      len = snprintf( ptr, size, "%02d:%02d", hh, mm );
      assert( len >= 0 && len < size );
      size -= len;
      ptr += len;
      if ( ss ) {
            len = snprintf( ptr, size, ":%02d", ss );
            assert( len >= 0 && len < size );
            size -= len;
            ptr += len;
      }

      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;
      SlapReply rs = {REP_RESULT};
      slap_callback cb = { NULL, log_old_lookup, NULL, NULL };
      Filter f;
      AttributeAssertion ava = ATTRIBUTEASSERTION_INIT;
      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, &opbuf, ctx );
      op = &opbuf.ob_op;

      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 ( !BER_BVISEMPTY( &li->li_db_suffix )) {
                        value_add_one( &c->rvalue_vals, &li->li_db_suffix );
                        value_add_one( &c->rvalue_nvals, &li->li_db_suffix );
                  } else if ( li->li_db ) {
                        value_add_one( &c->rvalue_vals, li->li_db->be_suffix );
                        value_add_one( &c->rvalue_nvals, li->li_db->be_nsuffix );
                  } else {
                        snprintf( c->cr_msg, sizeof( c->cr_msg ),
                              "accesslog: \"logdb <suffix>\" must be specified" );
                        Debug( LDAP_DEBUG_ANY, "%s: %s \"%s\"\n",
                              c->log, c->cr_msg, c->value_dn.bv_val );
                        rc = 1;
                        break;
                  }
                  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, sizeof( agebuf ) );
                  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, sizeof( agebuf ) - agebv.bv_len );
                  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;
            case LOG_OLDATTR:
                  if ( li->li_oldattrs ) {
                        log_attr *la;

                        for ( la = li->li_oldattrs; la; la=la->next )
                              value_add_one( &c->rvalue_vals, &la->attr->ad_cname );
                  }
                  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;
                        ldap_pvt_thread_mutex_lock( &slapd_rq.rq_mutex );
                        if ( ldap_pvt_runqueue_isrunning( &slapd_rq, re ))
                              ldap_pvt_runqueue_stoptask( &slapd_rq, re );
                        ldap_pvt_runqueue_remove( &slapd_rq, re );
                        ldap_pvt_thread_mutex_unlock( &slapd_rq.rq_mutex );
                  }
                  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;
            case LOG_OLDATTR:
                  if ( c->valx < 0 ) {
                        log_attr *la, *ln;

                        for ( la = li->li_oldattrs; la; la = ln ) {
                              ln = la->next;
                              ch_free( la );
                        }
                  } else {
                        log_attr *la = NULL, **lp;
                        int i;

                        for ( lp = &li->li_oldattrs, i=0; i < c->valx; i++ ) {
                              la = *lp;
                              lp = &la->next;
                        }
                        *lp = la->next;
                        ch_free( la );
                  }
                  break;
            }
            break;
      default:
            switch( c->type ) {
            case LOG_DB:
                  if ( CONFIG_ONLINE_ADD( c )) {
                        li->li_db = select_backend( &c->value_ndn, 0 );
                        if ( !li->li_db ) {
                              snprintf( c->cr_msg, sizeof( c->cr_msg ),
                                    "<%s> no matching backend found for suffix",
                                    c->argv[0] );
                              Debug( LDAP_DEBUG_ANY, "%s: %s \"%s\"\n",
                                    c->log, c->cr_msg, c->value_dn.bv_val );
                              rc = 1;
                        }
                        ch_free( c->value_ndn.bv_val );
                  } else {
                        li->li_db_suffix = c->value_ndn;
                  }
                  ch_free( c->value_dn.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 {
                                    ldap_pvt_thread_mutex_lock( &slapd_rq.rq_mutex );
                                    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 );
                                    ldap_pvt_thread_mutex_unlock( &slapd_rq.rq_mutex );
                              }
                        }
                  }
                  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 ) {
                        snprintf( c->cr_msg, sizeof( c->cr_msg ), "bad filter!" );
                        rc = 1;
                  }
                  break;
            case LOG_OLDATTR: {
                  int i;
                  AttributeDescription *ad;
                  const char *text;

                  for ( i=1; i< c->argc; i++ ) {
                        ad = NULL;
                        if ( slap_str2ad( c->argv[i], &ad, &text ) == LDAP_SUCCESS ) {
                              log_attr *la = ch_malloc( sizeof( log_attr ));
                              la->attr = ad;
                              la->next = li->li_oldattrs;
                              li->li_oldattrs = la;
                        } else {
                              snprintf( c->cr_msg, sizeof( c->cr_msg ), "%s <%s>: %s",
                                    c->argv[0], c->argv[i], text );
                              Debug( LDAP_DEBUG_CONFIG|LDAP_DEBUG_NONE,
                                    "%s: %s\n", c->log, c->cr_msg, 0 );
                              rc = ARG_BAD_CONF;
                              break;
                        }
                  }
                  }
                  break;
            }
            break;
      }
      return rc;
}

static int
logSchemaControlValidate(
      Syntax            *syntax,
      struct berval     *valp )
{
      struct berval     val, bv;
      int         i;
      int         rc = LDAP_SUCCESS;

      assert( valp != NULL );

      val = *valp;

      /* check minimal size */
      if ( val.bv_len < STRLENOF( "{*}" ) ) {
            return LDAP_INVALID_SYNTAX;
      }

      val.bv_len--;

      /* check SEQUENCE boundaries */
      if ( val.bv_val[ 0 ] != '{' /*}*/ ||
            val.bv_val[ val.bv_len ] != /*{*/ '}' )
      {
            return LDAP_INVALID_SYNTAX;
      }

      /* extract and check OID */
      for ( i = 1; i < val.bv_len; i++ ) {
            if ( !ASCII_SPACE( val.bv_val[ i ] ) ) {
                  break;
            }
      }

      bv.bv_val = &val.bv_val[ i ];

      for ( i++; i < val.bv_len; i++ ) {
            if ( ASCII_SPACE( val.bv_val[ i ] ) )
            {
                  break;
            }
      }

      bv.bv_len = &val.bv_val[ i ] - bv.bv_val;

      rc = numericoidValidate( NULL, &bv );
      if ( rc != LDAP_SUCCESS ) {
            return rc;
      }

      if ( i == val.bv_len ) {
            return LDAP_SUCCESS;
      }

      if ( val.bv_val[ i ] != ' ' ) {
            return LDAP_INVALID_SYNTAX;
      }

      for ( i++; i < val.bv_len; i++ ) {
            if ( !ASCII_SPACE( val.bv_val[ i ] ) ) {
                  break;
            }
      }

      if ( i == val.bv_len ) {
            return LDAP_SUCCESS;
      }

      /* extract and check criticality */
      if ( strncasecmp( &val.bv_val[ i ], "criticality ", STRLENOF( "criticality " ) ) == 0 )
      {
            i += STRLENOF( "criticality " );
            for ( ; i < val.bv_len; i++ ) {
                  if ( !ASCII_SPACE( val.bv_val[ i ] ) ) {
                        break;
                  }
            }

            if ( i == val.bv_len ) {
                  return LDAP_INVALID_SYNTAX;
            }

            bv.bv_val = &val.bv_val[ i ];

            for ( ; i < val.bv_len; i++ ) {
                  if ( ASCII_SPACE( val.bv_val[ i ] ) ) {
                        break;
                  }
            }

            bv.bv_len = &val.bv_val[ i ] - bv.bv_val;

            if ( !bvmatch( &bv, &slap_true_bv ) && !bvmatch( &bv, &slap_false_bv ) ) 
            {
                  return LDAP_INVALID_SYNTAX;
            }

            if ( i == val.bv_len ) {
                  return LDAP_SUCCESS;
            }

            if ( val.bv_val[ i ] != ' ' ) {
                  return LDAP_INVALID_SYNTAX;
            }

            for ( i++; i < val.bv_len; i++ ) {
                  if ( !ASCII_SPACE( val.bv_val[ i ] ) ) {
                        break;
                  }
            }

            if ( i == val.bv_len ) {
                  return LDAP_SUCCESS;
            }
      }

      /* extract and check controlValue */
      if ( strncasecmp( &val.bv_val[ i ], "controlValue ", STRLENOF( "controlValue " ) ) == 0 )
      {
            i += STRLENOF( "controlValue " );
            for ( ; i < val.bv_len; i++ ) {
                  if ( !ASCII_SPACE( val.bv_val[ i ] ) ) {
                        break;
                  }
            }

            if ( i == val.bv_len ) {
                  return LDAP_INVALID_SYNTAX;
            }

            if ( val.bv_val[ i ] != '"' ) {
                  return LDAP_INVALID_SYNTAX;
            }

            for ( ; i < val.bv_len; i++ ) {
                  if ( val.bv_val[ i ] == '"' ) {
                        break;
                  }

                  if ( !ASCII_HEX( val.bv_val[ i ] ) ) {
                        return LDAP_INVALID_SYNTAX;
                  }
            }

            if ( val.bv_val[ i ] != '"' ) {
                  return LDAP_INVALID_SYNTAX;
            }

            for ( ; i < val.bv_len; i++ ) {
                  if ( !ASCII_SPACE( val.bv_val[ i ] ) ) {
                        break;
                  }
            }

            if ( i == val.bv_len ) {
                  return LDAP_SUCCESS;
            }
      }

      return LDAP_INVALID_SYNTAX;
}

static int
accesslog_ctrls(
      LDAPControl **ctrls,
      BerVarray *valsp,
      BerVarray *nvalsp,
      void *memctx )
{
      long        i, rc = 0;

      assert( valsp != NULL );
      assert( ctrls != NULL );

      *valsp = NULL;
      *nvalsp = NULL;

      for ( i = 0; ctrls[ i ] != NULL; i++ ) {
            struct berval     idx,
                        oid,
                        noid,
                        bv;
            char        *ptr,
                        buf[ 32 ];

            if ( ctrls[ i ]->ldctl_oid == NULL ) {
                  return LDAP_PROTOCOL_ERROR;
            }

            idx.bv_len = snprintf( buf, sizeof( buf ), "{%ld}", i );
            idx.bv_val = buf;

            ber_str2bv( ctrls[ i ]->ldctl_oid, 0, 0, &oid );
            noid.bv_len = idx.bv_len + oid.bv_len;
            ptr = noid.bv_val = ber_memalloc_x( noid.bv_len + 1, memctx );
            ptr = lutil_strcopy( ptr, idx.bv_val );
            ptr = lutil_strcopy( ptr, oid.bv_val );

            bv.bv_len = idx.bv_len + STRLENOF( "{}" ) + oid.bv_len;

            if ( ctrls[ i ]->ldctl_iscritical ) {
                  bv.bv_len += STRLENOF( " criticality TRUE" );
            }

            if ( !BER_BVISNULL( &ctrls[ i ]->ldctl_value ) ) {
                  bv.bv_len += STRLENOF( " controlValue \"\"" )
                        + 2 * ctrls[ i ]->ldctl_value.bv_len;
            }

            ptr = bv.bv_val = ber_memalloc_x( bv.bv_len + 1, memctx );
            if ( ptr == NULL ) {
                  ber_bvarray_free( *valsp );
                  *valsp = NULL;
                  ber_bvarray_free( *nvalsp );
                  *nvalsp = NULL;
                  return LDAP_OTHER;
            }

            ptr = lutil_strcopy( ptr, idx.bv_val );

            *ptr++ = '{' /*}*/ ;
            ptr = lutil_strcopy( ptr, oid.bv_val );

            if ( ctrls[ i ]->ldctl_iscritical ) {
                  ptr = lutil_strcopy( ptr, " criticality TRUE" );
            }
            
            if ( !BER_BVISNULL( &ctrls[ i ]->ldctl_value ) ) {
                  int   j;

                  ptr = lutil_strcopy( ptr, " controlValue \"" );
                  for ( j = 0; j < ctrls[ i ]->ldctl_value.bv_len; j++ )
                  {
                        unsigned char     o;

                        o = ( ( ctrls[ i ]->ldctl_value.bv_val[ j ] >> 4 ) & 0xF );
                        if ( o < 10 ) {
                              *ptr++ = '0' + o;

                        } else {
                              *ptr++ = 'A' + o;
                        }

                        o = ( ctrls[ i ]->ldctl_value.bv_val[ j ] & 0xF );
                        if ( o < 10 ) {
                              *ptr++ = '0' + o;

                        } else {
                              *ptr++ = 'A' + o;
                        }
                  }

                  *ptr++ = '"';
            }

            *ptr++ = '}';
            *ptr = '\0';

            ber_bvarray_add_x( valsp, &bv, memctx );
            ber_bvarray_add_x( nvalsp, &noid, memctx );
      }

      return rc;
      
}

static Entry *accesslog_entry( Operation *op, SlapReply *rs, 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 = entry_alloc();

      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 );
      snprintf( timestamp.bv_val + timestamp.bv_len-1, sizeof(".123456Z"), ".%06dZ", op->o_tincr );
      timestamp.bv_len += STRLENOF(".123456");

      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 );
      snprintf( timestamp.bv_val + timestamp.bv_len-1, sizeof(".123456Z"), ".%06dZ", op2->o_tincr );
      timestamp.bv_len += STRLENOF(".123456");

      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 = snprintf( rdn.bv_val, sizeof( rdnbuf ), "%lu", op->o_connid );
      if ( rdn.bv_len >= 0 || rdn.bv_len < sizeof( rdnbuf ) ) {
            attr_merge_one( e, ad_reqSession, &rdn, NULL );
      } /* else? */

      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 */
      if ( op->o_ctrls ) {
            BerVarray   vals = NULL,
                        nvals = NULL;

            if ( accesslog_ctrls( op->o_ctrls, &vals, &nvals,
                  op->o_tmpmemctx ) == LDAP_SUCCESS && vals )
            {
                  attr_merge( e, ad_reqControls, vals, nvals );
                  ber_bvarray_free_x( vals, op->o_tmpmemctx );
                  ber_bvarray_free_x( nvals, op->o_tmpmemctx );
            }
      }

      if ( rs->sr_ctrls ) {
            BerVarray   vals = NULL,
                        nvals = NULL;

            if ( accesslog_ctrls( rs->sr_ctrls, &vals, &nvals,
                  op->o_tmpmemctx ) == LDAP_SUCCESS && vals )
            {
                  attr_merge( e, ad_reqRespControls, vals, nvals );
                  ber_bvarray_free_x( vals, op->o_tmpmemctx );
                  ber_bvarray_free_x( nvals, op->o_tmpmemctx );
            }

      }

      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_rmutex_unlock( &li->li_op_rmutex, op->o_tid );
      }

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

      e = accesslog_entry( op, rs, 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 = snprintf( timebuf, sizeof( timebuf ), "%d", rs->sr_err );
      if ( bv.bv_len >= 0 && bv.bv_len < sizeof( timebuf ) ) {
            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 ) {
                  i += a->a_numvals;
            }
            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_numvals = i;
            a->a_vals = vals;
            a->a_nvals = vals;
            last_attr->a_next = a;
            break;
      }

      case LOG_EN_MODRDN:
      case LOG_EN_MODIFY:
            /* count all the mods */
            i = 0;
            for ( m = op->orm_modlist; m; m = m->sml_next ) {
                  if ( m->sml_values ) {
                        i += m->sml_numvals;
                  } 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;

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

                        /* look for attrs that are always logged */
                        for ( la = li->li_oldattrs; la; la = la->next ) {
                              if ( a->a_desc == la->attr ) {
                                    a->a_flags = 1;
                              }
                        }
                  }
            }

            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;
                        }
                  }

                  /* don't log the RDN mods; they're explicitly logged later */
                  if ( logop == LOG_EN_MODRDN &&
                        ( m->sml_op == SLAP_MOD_SOFTADD ||
                          m->sml_op == LDAP_MOD_DELETE ) )
                  {
                        continue;
                  }

                  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++;
                  }
            }

            if ( i > 0 ) {
                  BER_BVZERO( &vals[i] );
                  a = attr_alloc( ad_reqMod );
                  a->a_numvals = i;
                  a->a_vals = vals;
                  a->a_nvals = vals;
                  last_attr->a_next = a;
                  last_attr = a;

            } else {
                  ch_free( vals );
            }

            if ( old ) {
                  /* count all the vals */
                  i = 0;
                  for ( a = old->e_attrs; a != NULL; a = a->a_next ) {
                        if ( a->a_vals && a->a_flags ) {
                              i += a->a_numvals;
                        }
                  }
                  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_numvals = i;
                  a->a_vals = vals;
                  a->a_nvals = vals;
                  last_attr->a_next = a;
            }
            if ( logop == LOG_EN_MODIFY ) {
                  break;
            }

            /* Now log the actual modRDN info */
            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 = snprintf( bv.bv_val, sizeof( timebuf ), "%d", rs->sr_nentries );
            if ( bv.bv_len >= 0 && bv.bv_len < sizeof( timebuf ) ) {
                  attr_merge_one( e, ad_reqEntries, &bv, NULL );
            } /* else? */

            bv.bv_len = snprintf( bv.bv_val, sizeof( timebuf ), "%d", op->ors_tlimit );
            if ( bv.bv_len >= 0 && bv.bv_len < sizeof( timebuf ) ) {
                  attr_merge_one( e, ad_reqTimeLimit, &bv, NULL );
            } /* else? */

            bv.bv_len = snprintf( bv.bv_val, sizeof( timebuf ), "%d", op->ors_slimit );
            if ( bv.bv_len >= 0 && bv.bv_len < sizeof( timebuf ) ) {
                  attr_merge_one( e, ad_reqSizeLimit, &bv, NULL );
            } /* else? */
            break;

      case LOG_EN_BIND:
            bv.bv_val = timebuf;
            bv.bv_len = snprintf( bv.bv_val, sizeof( timebuf ), "%d", op->o_protocol );
            if ( bv.bv_len >= 0 && bv.bv_len < sizeof( timebuf ) ) {
                  attr_merge_one( e, ad_reqVersion, &bv, NULL );
            } /* else? */
            if ( op->orb_method == LDAP_AUTH_SIMPLE ) {
                  attr_merge_one( e, ad_reqMethod, &simple, NULL );
            } else {
                  bv.bv_len = STRLENOF("SASL()") + op->orb_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_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 );
      if ( e == op2.ora_e ) entry_free( e );
      e = NULL;

done:
      if ( lo->mask & LOG_OP_WRITES )
            ldap_pvt_thread_mutex_unlock( &li->li_log_mutex );
      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_rmutex_lock( &li->li_op_rmutex, op->o_tid );
            if ( li->li_oldf && ( op->o_tag == LDAP_REQ_DELETE ||
                  op->o_tag == LDAP_REQ_MODIFY ||
                  ( op->o_tag == LDAP_REQ_MODRDN && li->li_oldattrs ))) {
                  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, rs, 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 );
            if ( e == op2.ora_e )
                  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, rs, LOG_EN_ABANDON, &op2 );
      bv.bv_val = buf;
      bv.bv_len = snprintf( buf, sizeof( buf ), "%d", op->orn_msgid );
      if ( bv.bv_len >= 0 && bv.bv_len < sizeof( buf ) ) {
            attr_merge_one( e, ad_reqId, &bv, NULL );
      } /* else? */

      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 );
      if ( e == op2.ora_e )
            entry_free( e );

      return SLAP_CB_CONTINUE;
}

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

      if ( op->o_sync != SLAP_CONTROL_NONE )
            return SLAP_CB_CONTINUE;

      if ( rs->sr_entry != NULL
            && dn_match( &op->o_bd->be_nsuffix[0], &rs->sr_entry->e_nname ) )
      {
            Attribute   **ap;

            for ( ap = &rs->sr_operational_attrs; *ap; ap = &(*ap)->a_next )
                  /* just count */ ;

            if ( SLAP_OPATTRS( rs->sr_attr_flags ) ||
                        ad_inlist( ad_auditContext, rs->sr_attrs ) )
            {
                  *ap = attr_alloc( ad_auditContext );
                  attr_valadd( *ap,
                        &li->li_db->be_suffix[0],
                        &li->li_db->be_nsuffix[0], 1 );
            }
      }

      return SLAP_CB_CONTINUE;
}

static slap_overinst accesslog;

static int
accesslog_db_init(
      BackendDB *be,
      ConfigReply *cr
)
{
      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_rmutex_init( &li->li_op_rmutex );
      ldap_pvt_thread_mutex_init( &li->li_log_mutex );
      return 0;
}

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

      if ( li->li_oldf )
            filter_free( li->li_oldf );
      for ( la=li->li_oldattrs; la; la=li->li_oldattrs ) {
            li->li_oldattrs = la->next;
            ch_free( la );
      }
      ldap_pvt_thread_mutex_destroy( &li->li_log_mutex );
      ldap_pvt_thread_rmutex_destroy( &li->li_op_rmutex );
      free( li );
      return LDAP_SUCCESS;
}

/* Create the logdb's root entry if it's missing */
static void *
accesslog_db_root(
      void *ctx,
      void *arg )
{
      struct re_s *rtask = arg;
      slap_overinst *on = rtask->arg;
      log_info *li = on->on_bi.bi_private;

      Connection conn = {0};
      OperationBuffer opbuf;
      Operation *op;

      Entry *e;
      int rc;

      connection_fake_init( &conn, &opbuf, ctx );
      op = &opbuf.ob_op;
      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 = entry_alloc();
            ber_dupbv( &e->e_name, li->li_db->be_suffix );
            ber_dupbv( &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 = on->on_info->oi_origdb;
            rc = be_entry_get_rw( op, op->o_bd->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 ) {
                        /* FIXME: contextCSN could have multiple values!
                         * should select the one with the server's SID */
                        attr_merge_one( e, slap_schema.si_ad_entryCSN,
                              &a->a_vals[0], &a->a_nvals[0] );
                        attr_merge( e, a->a_desc, a->a_vals, a->a_nvals );
                  }
                  be_entry_release_rw( op, e_ctx, 0 );
            }
            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;
            if ( e == op->ora_e )
                  entry_free( e );
      }
      ldap_pvt_thread_mutex_lock( &slapd_rq.rq_mutex );
      ldap_pvt_runqueue_stoptask( &slapd_rq, rtask );
      ldap_pvt_runqueue_remove( &slapd_rq, rtask );
      ldap_pvt_thread_mutex_unlock( &slapd_rq.rq_mutex );

      return NULL;
}

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


      if ( !BER_BVISEMPTY( &li->li_db_suffix )) {
            li->li_db = select_backend( &li->li_db_suffix, 0 );
            ch_free( li->li_db_suffix.bv_val );
            BER_BVZERO( &li->li_db_suffix );
      }
      if ( li->li_db == NULL ) {
            Debug( LDAP_DEBUG_ANY,
                  "accesslog: \"logdb <suffix>\" missing or invalid.\n",
                  0, 0, 0 );
            return 1;
      }

      if ( slapMode & SLAP_TOOL_MODE )
            return 0;

      if ( BER_BVISEMPTY( &li->li_db->be_rootndn )) {
            ber_dupbv( &li->li_db->be_rootdn, li->li_db->be_suffix );
            ber_dupbv( &li->li_db->be_rootndn, li->li_db->be_nsuffix );
      }

      ldap_pvt_thread_mutex_lock( &slapd_rq.rq_mutex );
      ldap_pvt_runqueue_insert( &slapd_rq, 3600, accesslog_db_root, on,
            "accesslog_db_root", li->li_db->be_suffix[0].bv_val );
      ldap_pvt_thread_mutex_unlock( &slapd_rq.rq_mutex );

      return 0;
}

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_bi.bi_operational = accesslog_operational;
      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; lsyntaxes[i].oid; i++ ) {
            int code;

            code = register_syntax( &lsyntaxes[ i ].syn );
            if ( code != 0 ) {
                  Debug( LDAP_DEBUG_ANY,
                        "accesslog_init: register_syntax failed\n",
                        0, 0, 0 );
                  return code;
            }

            if ( lsyntaxes[i].mrs != NULL ) {
                  code = mr_make_syntax_compat_with_mrs(
                        lsyntaxes[i].oid, lsyntaxes[i].mrs );
                  if ( code < 0 ) {
                        Debug( LDAP_DEBUG_ANY,
                              "accesslog_init: "
                              "mr_make_syntax_compat_with_mrs "
                              "failed\n",
                              0, 0, 0 );
                        return code;
                  }
            }
      }

      for ( i=0; lattrs[i].at; i++ ) {
            int code;

            code = register_at( lattrs[i].at, lattrs[i].ad, 0 );
            if ( code ) {
                  Debug( LDAP_DEBUG_ANY,
                        "accesslog_init: register_at failed\n",
                        0, 0, 0 );
                  return -1;
            }
#ifndef LDAP_DEVEL
            (*lattrs[i].ad)->ad_type->sat_flags |= SLAP_AT_HIDE;
#endif
      }

      for ( i=0; locs[i].ot; i++ ) {
            int code;

            code = register_oc( locs[i].ot, locs[i].oc, 0 );
            if ( code ) {
                  Debug( LDAP_DEBUG_ANY,
                        "accesslog_init: register_oc failed\n",
                        0, 0, 0 );
                  return -1;
            }
#ifndef LDAP_DEVEL
            (*locs[i].oc)->soc_flags |= SLAP_OC_HIDE;
#endif
      }

      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 */

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