openldap/servers/slapd/back-bdb/compare.c

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/* compare.c - bdb backend compare routine */
/* $OpenLDAP$ */
/*
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* Copyright 1998-2002 The OpenLDAP Foundation, All Rights Reserved.
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* COPYING RESTRICTIONS APPLY, see COPYRIGHT file
*/
#include "portable.h"
#include <stdio.h>
#include <ac/string.h>
#include "back-bdb.h"
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#include "external.h"
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int
bdb_compare(
BackendDB *be,
Connection *conn,
Operation *op,
struct berval *dn,
struct berval *ndn,
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AttributeAssertion *ava
)
{
struct bdb_info *bdb = (struct bdb_info *) be->be_private;
Entry *matched;
Entry *e;
Attribute *a;
int rc;
const char *text = NULL;
int manageDSAit = get_manageDSAit( op );
u_int32_t locker;
DB_LOCK lock;
rc = LOCK_ID(bdb->bi_dbenv, &locker);
switch(rc) {
case 0:
break;
default:
send_ldap_result( conn, op, rc=LDAP_OTHER,
NULL, "internal error", NULL, NULL );
return rc;
}
dn2entry_retry:
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/* get entry */
rc = bdb_dn2entry_r( be, NULL, ndn, &e, &matched, 0, locker, &lock );
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switch( rc ) {
case DB_NOTFOUND:
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case 0:
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break;
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case LDAP_BUSY:
text = "ldap server busy";
goto return_results;
case DB_LOCK_DEADLOCK:
case DB_LOCK_NOTGRANTED:
goto dn2entry_retry;
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default:
rc = LDAP_OTHER;
text = "internal error";
goto return_results;
}
if ( e == NULL ) {
char *matched_dn = NULL;
BerVarray refs;
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if ( matched != NULL ) {
matched_dn = ch_strdup( matched->e_dn );
refs = is_entry_referral( matched )
? get_entry_referrals( be, conn, op, matched )
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: NULL;
bdb_cache_return_entry_r( bdb->bi_dbenv, &bdb->bi_cache, matched, &lock );
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matched = NULL;
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} else {
refs = referral_rewrite( default_referral,
NULL, dn, LDAP_SCOPE_DEFAULT );
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}
send_ldap_result( conn, op, rc = LDAP_REFERRAL,
matched_dn, NULL, refs, NULL );
ber_bvarray_free( refs );
free( matched_dn );
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goto done;
}
if (!manageDSAit && is_entry_referral( e ) ) {
/* entry is a referral, don't allow add */
BerVarray refs = get_entry_referrals( be,
conn, op, e );
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#ifdef NEW_LOGGING
LDAP_LOG ( OPERATION, DETAIL1,
"bdb_compare: entry is referral\n", 0, 0, 0 );
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#else
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Debug( LDAP_DEBUG_TRACE, "entry is referral\n", 0,
0, 0 );
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#endif
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send_ldap_result( conn, op, rc = LDAP_REFERRAL,
e->e_dn, NULL, refs, NULL );
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ber_bvarray_free( refs );
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goto done;
}
if ( ! access_allowed( be, conn, op, e,
ava->aa_desc, &ava->aa_value, ACL_COMPARE, NULL ) )
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{
rc = LDAP_INSUFFICIENT_ACCESS;
goto return_results;
}
rc = LDAP_NO_SUCH_ATTRIBUTE;
for(a = attrs_find( e->e_attrs, ava->aa_desc );
a != NULL;
a = attrs_find( a->a_next, ava->aa_desc ))
{
rc = LDAP_COMPARE_FALSE;
if ( value_find( ava->aa_desc, a->a_vals, &ava->aa_value ) == 0 ) {
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rc = LDAP_COMPARE_TRUE;
break;
}
}
return_results:
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send_ldap_result( conn, op, rc,
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NULL, text, NULL, NULL );
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if( rc == LDAP_COMPARE_FALSE || rc == LDAP_COMPARE_TRUE ) {
rc = LDAP_SUCCESS;
}
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done:
/* free entry */
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if( e != NULL ) {
bdb_cache_return_entry_r( bdb->bi_dbenv, &bdb->bi_cache, e, &lock );
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}
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LOCK_ID_FREE ( bdb->bi_dbenv, locker );
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return rc;
}