mirror of
https://git.openldap.org/openldap/openldap.git
synced 2024-12-21 03:10:25 +08:00
409 lines
8.8 KiB
C
409 lines
8.8 KiB
C
/* search.c - ldbm backend search function */
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/* $OpenLDAP$ */
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/*
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* Copyright 1998-2000 The OpenLDAP Foundation, All Rights Reserved.
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* COPYING RESTRICTIONS APPLY, see COPYRIGHT file
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*/
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#include "portable.h"
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#include <stdio.h>
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#include <ac/string.h>
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#include <ac/socket.h>
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#include "slap.h"
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#include "back-ldbm.h"
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#include "proto-back-ldbm.h"
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static ID_BLOCK *base_candidate(
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Backend *be, Entry *e );
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static ID_BLOCK *search_candidates(
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Backend *be, Entry *e, Filter *filter,
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int scope, int deref, int manageDSAit );
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int
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ldbm_back_search(
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Backend *be,
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Connection *conn,
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Operation *op,
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const char *base,
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const char *nbase,
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int scope,
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int deref,
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int slimit,
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int tlimit,
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Filter *filter,
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const char *filterstr,
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char **attrs,
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int attrsonly )
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{
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struct ldbminfo *li = (struct ldbminfo *) be->be_private;
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int rc, err;
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const char *text = NULL;
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time_t stoptime;
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ID_BLOCK *candidates;
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ID id, cursor;
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Entry *e;
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struct berval **v2refs = NULL;
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Entry *matched = NULL;
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char *realbase = NULL;
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int nentries = 0;
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int manageDSAit = get_manageDSAit( op );
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Debug(LDAP_DEBUG_TRACE, "=> ldbm_back_search\n", 0, 0, 0);
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/* get entry with reader lock */
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if ( deref & LDAP_DEREF_FINDING ) {
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e = deref_dn_r( be, nbase, &err, &matched, &text );
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} else {
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e = dn2entry_r( be, nbase, &matched );
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err = e != NULL ? LDAP_SUCCESS : LDAP_REFERRAL;
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text = NULL;
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}
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if ( e == NULL ) {
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char *matched_dn = NULL;
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struct berval **refs = NULL;
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if ( matched != NULL ) {
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matched_dn = ch_strdup( matched->e_dn );
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refs = is_entry_referral( matched )
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? get_entry_referrals( be, conn, op, matched )
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: NULL;
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cache_return_entry_r( &li->li_cache, matched );
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} else {
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refs = default_referral;
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}
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send_ldap_result( conn, op, err,
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matched_dn, text, refs, NULL );
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if( matched != NULL ) {
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ber_bvecfree( refs );
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free( matched_dn );
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}
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return 1;
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}
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if (!manageDSAit && is_entry_referral( e ) ) {
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/* entry is a referral, don't allow add */
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char *matched_dn = ch_strdup( e->e_dn );
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struct berval **refs = get_entry_referrals( be,
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conn, op, e );
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cache_return_entry_r( &li->li_cache, e );
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Debug( LDAP_DEBUG_TRACE, "entry is referral\n", 0,
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0, 0 );
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send_ldap_result( conn, op, LDAP_REFERRAL,
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matched_dn, NULL, refs, NULL );
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ber_bvecfree( refs );
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free( matched_dn );
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return 1;
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}
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if ( is_entry_alias( e ) ) {
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/* don't deref */
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deref = LDAP_DEREF_NEVER;
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}
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if ( tlimit == 0 && be_isroot( be, op->o_ndn ) ) {
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tlimit = -1; /* allow root to set no limit */
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} else {
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tlimit = (tlimit > be->be_timelimit || tlimit < 1) ?
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be->be_timelimit : tlimit;
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stoptime = op->o_time + tlimit;
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}
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if ( slimit == 0 && be_isroot( be, op->o_ndn ) ) {
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slimit = -1; /* allow root to set no limit */
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} else {
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slimit = (slimit > be->be_sizelimit || slimit < 1) ?
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be->be_sizelimit : slimit;
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}
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if ( scope == LDAP_SCOPE_BASE ) {
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candidates = base_candidate( be, e );
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} else {
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candidates = search_candidates( be, e, filter,
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scope, deref, manageDSAit );
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}
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/* need normalized dn below */
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realbase = ch_strdup( e->e_ndn );
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cache_return_entry_r( &li->li_cache, e );
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if ( candidates == NULL ) {
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/* no candidates */
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Debug( LDAP_DEBUG_TRACE, "no candidates\n", 0,
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0, 0 );
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send_search_result( conn, op,
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LDAP_SUCCESS,
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NULL, NULL, NULL, NULL, 0 );
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rc = 1;
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goto done;
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}
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for ( id = idl_firstid( candidates, &cursor ); id != NOID;
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id = idl_nextid( candidates, &cursor ) )
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{
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int scopeok = 0;
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/* check for abandon */
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ldap_pvt_thread_mutex_lock( &op->o_abandonmutex );
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if ( op->o_abandon ) {
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ldap_pvt_thread_mutex_unlock( &op->o_abandonmutex );
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rc = 0;
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goto done;
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}
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ldap_pvt_thread_mutex_unlock( &op->o_abandonmutex );
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/* check time limit */
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if ( tlimit != -1 && slap_get_time() > stoptime ) {
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send_search_result( conn, op, LDAP_TIMELIMIT_EXCEEDED,
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NULL, NULL, v2refs, NULL, nentries );
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rc = 0;
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goto done;
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}
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/* get the entry with reader lock */
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e = id2entry_r( be, id );
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if ( e == NULL ) {
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Debug( LDAP_DEBUG_ARGS, "search: candidate %ld not found\n",
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id, 0, 0 );
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goto loop_continue;
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}
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if ( deref & LDAP_DEREF_SEARCHING && is_entry_alias( e ) ) {
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Entry *matched;
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int err;
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const char *text;
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e = deref_entry_r( be, e, &err, &matched, &text );
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if( e == NULL ) {
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e = matched;
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goto loop_continue;
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}
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if( e->e_id == id ) {
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/* circular loop */
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goto loop_continue;
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}
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/* need to skip alias which deref into scope */
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if( scope & LDAP_SCOPE_ONELEVEL ) {
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char *pdn = dn_parent( NULL, e->e_ndn );
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if ( pdn != NULL ) {
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if( strcmp( pdn, realbase ) ) {
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free( pdn );
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goto loop_continue;
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}
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free(pdn);
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}
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} else if ( dn_issuffix( e->e_ndn, realbase ) ) {
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/* alias is within scope */
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Debug( LDAP_DEBUG_ARGS, "search: \"%s\" in subtree\n",
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e->e_dn, 0, 0 );
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goto loop_continue;
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}
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scopeok = 1;
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}
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/*
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* if it's a referral, add it to the list of referrals. only do
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* this for non-base searches, and don't check the filter
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* explicitly here since it's only a candidate anyway.
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*/
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if ( !manageDSAit && scope != LDAP_SCOPE_BASE &&
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is_entry_referral( e ) )
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{
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struct berval **refs = get_entry_referrals(
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be, conn, op, e );
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send_search_reference( be, conn, op,
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e, refs, scope, NULL, &v2refs );
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ber_bvecfree( refs );
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goto loop_continue;
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}
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/* if it matches the filter and scope, send it */
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if ( test_filter( be, conn, op, e, filter ) == LDAP_COMPARE_TRUE ) {
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char *dn;
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/* check scope */
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if ( !scopeok && scope == LDAP_SCOPE_ONELEVEL ) {
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if ( (dn = dn_parent( be, e->e_ndn )) != NULL ) {
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(void) dn_normalize( dn );
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scopeok = (dn == realbase)
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? 1
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: (strcmp( dn, realbase ) ? 0 : 1 );
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free( dn );
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} else {
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scopeok = (realbase == NULL || *realbase == '\0');
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}
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} else if ( !scopeok && scope == LDAP_SCOPE_SUBTREE ) {
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dn = ch_strdup( e->e_ndn );
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scopeok = dn_issuffix( dn, realbase );
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free( dn );
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} else {
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scopeok = 1;
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}
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if ( scopeok ) {
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/* check size limit */
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if ( --slimit == -1 ) {
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cache_return_entry_r( &li->li_cache, e );
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send_search_result( conn, op,
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LDAP_SIZELIMIT_EXCEEDED, NULL, NULL,
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v2refs, NULL, nentries );
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rc = 0;
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goto done;
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}
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if (e) {
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int result = send_search_entry(be, conn, op,
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e, attrs, attrsonly, NULL);
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switch (result) {
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case 0: /* entry sent ok */
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nentries++;
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break;
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case 1: /* entry not sent */
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break;
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case -1: /* connection closed */
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cache_return_entry_r( &li->li_cache, e );
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rc = 0;
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goto done;
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}
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}
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} else {
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Debug( LDAP_DEBUG_TRACE, "candidate %ld scope not okay\n",
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id, 0, 0 );
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}
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} else {
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Debug( LDAP_DEBUG_TRACE, "candidate %ld does match filter\n",
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id, 0, 0 );
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}
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loop_continue:
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if( e != NULL ) {
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/* free reader lock */
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cache_return_entry_r( &li->li_cache, e );
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}
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ldap_pvt_thread_yield();
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}
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send_search_result( conn, op,
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v2refs == NULL ? LDAP_SUCCESS : LDAP_REFERRAL,
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NULL, NULL, v2refs, NULL, nentries );
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rc = 0;
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done:
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if( candidates != NULL )
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idl_free( candidates );
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ber_bvecfree( v2refs );
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if( realbase ) free( realbase );
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return rc;
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}
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static ID_BLOCK *
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base_candidate(
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Backend *be,
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Entry *e )
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{
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ID_BLOCK *idl;
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Debug(LDAP_DEBUG_TRACE, "base_candidates: base: \"%s\"\n",
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e->e_dn, 0, 0);
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idl = idl_alloc( 1 );
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idl_insert( &idl, e->e_id, 1 );
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return( idl );
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}
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static ID_BLOCK *
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search_candidates(
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Backend *be,
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Entry *e,
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Filter *filter,
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int scope,
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int deref,
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int manageDSAit )
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{
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ID_BLOCK *candidates;
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Filter f, fand, rf, af, xf;
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AttributeAssertion aa_ref, aa_alias;
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static struct berval bv_ref = { sizeof("REFERRAL")-1, "REFERRAL" };
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static struct berval bv_alias = { sizeof("ALIAS")-1, "ALIAS" };
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Debug(LDAP_DEBUG_TRACE, "search_candidates: base=\"%s\" s=%d d=%d\n",
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e->e_ndn, scope, deref );
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xf.f_or = filter;
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xf.f_choice = LDAP_FILTER_OR;
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xf.f_next = NULL;
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if( !manageDSAit ) {
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/* match referrals */
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rf.f_choice = LDAP_FILTER_EQUALITY;
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rf.f_ava = &aa_ref;
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rf.f_av_desc = slap_schema.si_ad_objectClass;
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rf.f_av_value = &bv_ref;
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rf.f_next = xf.f_or;
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xf.f_or = &rf;
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}
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if( deref & LDAP_DEREF_SEARCHING ) {
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/* match aliases */
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af.f_choice = LDAP_FILTER_EQUALITY;
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af.f_ava = &aa_alias;
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af.f_av_desc = slap_schema.si_ad_objectClass;
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af.f_av_value = &bv_alias;
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af.f_next = xf.f_or;
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xf.f_or = ⁡
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}
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f.f_next = NULL;
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f.f_choice = LDAP_FILTER_AND;
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f.f_and = &fand;
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fand.f_choice = scope == LDAP_SCOPE_SUBTREE
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? SLAPD_FILTER_DN_SUBTREE
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: SLAPD_FILTER_DN_ONE;
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fand.f_dn = e->e_ndn;
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fand.f_next = xf.f_or == filter ? filter : &xf ;
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candidates = filter_candidates( be, &f );
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return( candidates );
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}
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