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612 lines
14 KiB
C
612 lines
14 KiB
C
/* search.c - ldbm backend search function */
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/* $OpenLDAP$ */
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/*
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* Copyright 1998-2002 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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struct berval *base,
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struct berval *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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struct berval *filterstr,
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AttributeName *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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BerVarray v2refs = NULL;
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Entry *matched = NULL;
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struct berval realbase = { 0, NULL };
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int nentries = 0;
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int manageDSAit = get_manageDSAit( op );
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int cscope = LDAP_SCOPE_DEFAULT;
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struct slap_limits_set *limit = NULL;
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int isroot = 0;
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#ifdef NEW_LOGGING
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LDAP_LOG( BACK_LDBM, ENTRY, "ldbm_back_search: enter\n", 0, 0, 0 );
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#else
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Debug(LDAP_DEBUG_TRACE, "=> ldbm_back_search\n", 0, 0, 0);
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#endif
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/* grab giant lock for reading */
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ldap_pvt_thread_rdwr_rlock(&li->li_giant_rwlock);
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if ( nbase->bv_len == 0 ) {
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/* DIT root special case */
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e = (Entry *) &slap_entry_root;
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/* need normalized dn below */
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ber_dupbv( &realbase, &e->e_nname );
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candidates = search_candidates( be, e, filter,
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scope, deref, manageDSAit );
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goto searchit;
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} else if ( deref & LDAP_DEREF_FINDING ) {
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/* deref dn and get entry with reader lock */
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e = deref_dn_r( be, nbase, &err, &matched, &text );
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if( err == LDAP_NO_SUCH_OBJECT ) err = LDAP_REFERRAL;
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} else {
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/* get entry with reader lock */
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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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struct berval matched_dn = { 0, NULL };
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BerVarray refs = NULL;
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if ( matched != NULL ) {
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BerVarray erefs;
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ber_dupbv( &matched_dn, &matched->e_name );
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erefs = 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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if( erefs ) {
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refs = referral_rewrite( erefs, &matched_dn,
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base, scope );
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ber_bvarray_free( erefs );
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}
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} else {
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refs = referral_rewrite( default_referral,
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NULL, base, scope );
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}
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ldap_pvt_thread_rdwr_runlock(&li->li_giant_rwlock);
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send_ldap_result( conn, op, err, matched_dn.bv_val,
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text, refs, NULL );
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ber_bvarray_free( refs );
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ber_memfree( matched_dn.bv_val );
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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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struct berval matched_dn;
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BerVarray erefs;
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BerVarray refs;
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ber_dupbv( &matched_dn, &e->e_name );
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erefs = get_entry_referrals( be, conn, op, e );
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refs = NULL;
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cache_return_entry_r( &li->li_cache, e );
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ldap_pvt_thread_rdwr_runlock(&li->li_giant_rwlock);
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#ifdef NEW_LOGGING
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LDAP_LOG( BACK_LDBM, INFO,
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"ldbm_search: entry (%s) is a referral.\n",
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e->e_dn, 0, 0 );
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#else
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Debug( LDAP_DEBUG_TRACE,
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"ldbm_search: entry is referral\n",
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0, 0, 0 );
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#endif
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if( erefs ) {
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refs = referral_rewrite( erefs, &matched_dn,
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base, scope );
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ber_bvarray_free( erefs );
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}
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if( refs ) {
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send_ldap_result( conn, op, LDAP_REFERRAL,
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matched_dn.bv_val, NULL, refs, NULL );
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ber_bvarray_free( refs );
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} else {
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send_ldap_result( conn, op, LDAP_OTHER,
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matched_dn.bv_val,
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"bad referral object", NULL, NULL );
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}
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ber_memfree( matched_dn.bv_val );
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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 ( scope == LDAP_SCOPE_BASE ) {
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cscope = LDAP_SCOPE_BASE;
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candidates = base_candidate( be, e );
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} else {
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cscope = ( scope != LDAP_SCOPE_SUBTREE )
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? LDAP_SCOPE_BASE : LDAP_SCOPE_SUBTREE;
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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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ber_dupbv( &realbase, &e->e_nname );
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cache_return_entry_r( &li->li_cache, e );
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searchit:
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if ( candidates == NULL ) {
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/* no candidates */
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#ifdef NEW_LOGGING
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LDAP_LOG( BACK_LDBM, INFO,
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"ldbm_search: no candidates\n" , 0, 0, 0);
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#else
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Debug( LDAP_DEBUG_TRACE, "ldbm_search: no candidates\n",
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0, 0, 0 );
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#endif
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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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/* if not root, get appropriate limits */
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if ( be_isroot( be, &op->o_ndn ) ) {
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isroot = 1;
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} else {
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( void ) get_limits( be, &op->o_ndn, &limit );
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}
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/* if candidates exceed to-be-checked entries, abort */
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if ( !isroot && limit->lms_s_unchecked != -1 ) {
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if ( ID_BLOCK_NIDS( candidates ) > (unsigned) limit->lms_s_unchecked ) {
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send_search_result( conn, op, LDAP_ADMINLIMIT_EXCEEDED,
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NULL, NULL, NULL, NULL, 0 );
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rc = 0;
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goto done;
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}
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}
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/* if root an no specific limit is required, allow unlimited search */
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if ( isroot ) {
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if ( tlimit == 0 ) {
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tlimit = -1;
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}
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if ( slimit == 0 ) {
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slimit = -1;
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}
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} else {
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/* if no limit is required, use soft limit */
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if ( tlimit <= 0 ) {
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tlimit = limit->lms_t_soft;
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/* if requested limit higher than hard limit, abort */
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} else if ( tlimit > limit->lms_t_hard ) {
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/* no hard limit means use soft instead */
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if ( limit->lms_t_hard == 0
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&& limit->lms_t_soft > -1
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&& tlimit > limit->lms_t_soft ) {
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tlimit = limit->lms_t_soft;
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/* positive hard limit means abort */
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} else if ( limit->lms_t_hard > 0 ) {
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send_search_result( conn, op,
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LDAP_ADMINLIMIT_EXCEEDED,
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NULL, NULL, NULL, NULL, 0 );
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rc = 0;
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goto done;
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}
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/* negative hard limit means no limit */
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}
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/* if no limit is required, use soft limit */
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if ( slimit <= 0 ) {
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slimit = limit->lms_s_soft;
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/* if requested limit higher than hard limit, abort */
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} else if ( slimit > limit->lms_s_hard ) {
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/* no hard limit means use soft instead */
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if ( limit->lms_s_hard == 0
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&& limit->lms_s_soft > -1
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&& slimit > limit->lms_s_soft ) {
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slimit = limit->lms_s_soft;
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/* positive hard limit means abort */
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} else if ( limit->lms_s_hard > 0 ) {
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send_search_result( conn, op,
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LDAP_ADMINLIMIT_EXCEEDED,
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NULL, NULL, NULL, NULL, 0 );
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rc = 0;
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goto done;
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}
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/* negative hard limit means no limit */
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}
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}
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/* compute it anyway; root does not use it */
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stoptime = op->o_time + tlimit;
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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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int result = 0;
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/* check for abandon */
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if ( op->o_abandon ) {
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rc = 0;
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goto done;
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}
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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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#ifdef NEW_LOGGING
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LDAP_LOG( BACK_LDBM, INFO,
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"ldbm_search: candidate %ld not found.\n", id, 0, 0 );
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#else
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Debug( LDAP_DEBUG_TRACE,
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"ldbm_search: candidate %ld not found\n",
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id, 0, 0 );
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#endif
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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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struct berval pdn;
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dnParent( &e->e_nname, &pdn );
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if ( ber_bvcmp( &pdn, &realbase ) ) {
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goto loop_continue;
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}
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} else if ( dnIsSuffix( &e->e_nname, &realbase ) ) {
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/* alias is within scope */
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#ifdef NEW_LOGGING
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LDAP_LOG( BACK_LDBM, DETAIL1,
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"ldbm_search: alias \"%s\" in subtree\n", e->e_dn, 0, 0 );
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#else
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Debug( LDAP_DEBUG_TRACE,
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"ldbm_search: alias \"%s\" in subtree\n",
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e->e_dn, 0, 0 );
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#endif
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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 dn;
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/* check scope */
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if ( !scopeok && scope == LDAP_SCOPE_ONELEVEL ) {
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if ( !be_issuffix( be, &e->e_nname ) ) {
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dnParent( &e->e_nname, &dn );
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scopeok = dn_match( &dn, &realbase );
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} else {
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scopeok = (realbase.bv_len == 0);
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}
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} else if ( !scopeok && scope == LDAP_SCOPE_SUBTREE ) {
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scopeok = dnIsSuffix( &e->e_nname, &realbase );
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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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BerVarray erefs = get_entry_referrals(
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be, conn, op, e );
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BerVarray refs = referral_rewrite( erefs,
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&e->e_name, NULL,
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scope == LDAP_SCOPE_SUBTREE
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? LDAP_SCOPE_SUBTREE
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: LDAP_SCOPE_BASE );
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send_search_reference( be, conn, op,
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e, refs, NULL, &v2refs );
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ber_bvarray_free( refs );
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} else {
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#ifdef NEW_LOGGING
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LDAP_LOG( BACK_LDBM, DETAIL2,
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"ldbm_search: candidate referral %ld scope not okay\n",
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id, 0, 0 );
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#else
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Debug( LDAP_DEBUG_TRACE,
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"ldbm_search: candidate referral %ld scope not okay\n",
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id, 0, 0 );
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#endif
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}
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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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result = test_filter( be, conn, op, e, filter );
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if ( result == LDAP_COMPARE_TRUE ) {
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struct berval dn;
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/* check scope */
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if ( !scopeok && scope == LDAP_SCOPE_ONELEVEL ) {
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if ( !be_issuffix( be, &e->e_nname ) ) {
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dnParent( &e->e_nname, &dn );
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scopeok = dn_match( &dn, &realbase );
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} else {
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scopeok = (realbase.bv_len == 0);
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}
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} else if ( !scopeok && scope == LDAP_SCOPE_SUBTREE ) {
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scopeok = dnIsSuffix( &e->e_nname, &realbase );
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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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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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#ifdef NEW_LOGGING
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LDAP_LOG( BACK_LDBM, DETAIL2,
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"ldbm_search: candidate entry %ld scope not okay\n",
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id, 0, 0 );
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#else
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Debug( LDAP_DEBUG_TRACE,
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"ldbm_search: candidate entry %ld scope not okay\n",
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id, 0, 0 );
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#endif
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}
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} else {
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#ifdef NEW_LOGGING
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LDAP_LOG( BACK_LDBM, DETAIL2,
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"ldbm_search: candidate entry %ld does not match filter\n",
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id, 0, 0 );
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#else
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Debug( LDAP_DEBUG_TRACE,
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"ldbm_search: candidate entry %ld does not match filter\n",
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id, 0, 0 );
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#endif
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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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ldap_pvt_thread_rdwr_runlock(&li->li_giant_rwlock);
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if( candidates != NULL )
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idl_free( candidates );
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if( v2refs ) ber_bvarray_free( v2refs );
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if( realbase.bv_val ) free( realbase.bv_val );
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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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#ifdef NEW_LOGGING
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LDAP_LOG( BACK_LDBM, ENTRY, "base_candidate: base (%s)\n", e->e_dn, 0, 0 );
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#else
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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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#endif
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idl = idl_alloc( 1 );
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idl_insert( &idl, e->e_id, 1 );
|
|
|
|
return( idl );
|
|
}
|
|
|
|
static ID_BLOCK *
|
|
search_candidates(
|
|
Backend *be,
|
|
Entry *e,
|
|
Filter *filter,
|
|
int scope,
|
|
int deref,
|
|
int manageDSAit )
|
|
{
|
|
ID_BLOCK *candidates;
|
|
Filter f, fand, rf, af, xf;
|
|
AttributeAssertion aa_ref, aa_alias;
|
|
struct berval bv_ref = { sizeof("referral")-1, "referral" };
|
|
struct berval bv_alias = { sizeof("alias")-1, "alias" };
|
|
|
|
#ifdef NEW_LOGGING
|
|
LDAP_LOG( BACK_LDBM, DETAIL1,
|
|
"search_candidates: base (%s) scope %d deref %d\n",
|
|
e->e_ndn, scope, deref );
|
|
#else
|
|
Debug(LDAP_DEBUG_TRACE,
|
|
"search_candidates: base=\"%s\" s=%d d=%d\n",
|
|
e->e_ndn, scope, deref );
|
|
#endif
|
|
|
|
|
|
xf.f_or = filter;
|
|
xf.f_choice = LDAP_FILTER_OR;
|
|
xf.f_next = NULL;
|
|
|
|
if( !manageDSAit ) {
|
|
/* match referrals */
|
|
rf.f_choice = LDAP_FILTER_EQUALITY;
|
|
rf.f_ava = &aa_ref;
|
|
rf.f_av_desc = slap_schema.si_ad_objectClass;
|
|
rf.f_av_value = bv_ref;
|
|
rf.f_next = xf.f_or;
|
|
xf.f_or = &rf;
|
|
}
|
|
|
|
if( deref & LDAP_DEREF_SEARCHING ) {
|
|
/* match aliases */
|
|
af.f_choice = LDAP_FILTER_EQUALITY;
|
|
af.f_ava = &aa_alias;
|
|
af.f_av_desc = slap_schema.si_ad_objectClass;
|
|
af.f_av_value = bv_alias;
|
|
af.f_next = xf.f_or;
|
|
xf.f_or = ⁡
|
|
}
|
|
|
|
f.f_next = NULL;
|
|
f.f_choice = LDAP_FILTER_AND;
|
|
f.f_and = &fand;
|
|
fand.f_choice = scope == LDAP_SCOPE_SUBTREE
|
|
? SLAPD_FILTER_DN_SUBTREE
|
|
: SLAPD_FILTER_DN_ONE;
|
|
fand.f_dn = &e->e_nname;
|
|
fand.f_next = xf.f_or == filter ? filter : &xf ;
|
|
|
|
candidates = filter_candidates( be, &f );
|
|
|
|
return( candidates );
|
|
}
|