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729 lines
16 KiB
C
729 lines
16 KiB
C
/* $OpenLDAP$ */
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/* This work is part of OpenLDAP Software <http://www.openldap.org/>.
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*
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* Copyright 1999-2004 The OpenLDAP Foundation.
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* Portions Copyright 2001-2003 Pierangelo Masarati.
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* Portions Copyright 1999-2003 Howard Chu.
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* All rights reserved.
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted only as authorized by the OpenLDAP
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* Public License.
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*
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* A copy of this license is available in the file LICENSE in the
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* top-level directory of the distribution or, alternatively, at
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* <http://www.OpenLDAP.org/license.html>.
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*/
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/* ACKNOWLEDGEMENTS:
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* This work was initially developed by the Howard Chu for inclusion
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* in OpenLDAP Software and subsequently enhanced by Pierangelo
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* Masarati.
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*/
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#include "portable.h"
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#include <stdio.h>
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#include <ac/socket.h>
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#include <ac/string.h>
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#include <ac/time.h>
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#include "slap.h"
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#include "../back-ldap/back-ldap.h"
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#include "back-meta.h"
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#include "ldap_pvt.h"
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#undef ldap_debug /* silence a warning in ldap-int.h */
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#include "ldap_log.h"
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#include "../../../libraries/libldap/ldap-int.h"
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static int
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meta_send_entry(
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Operation *op,
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SlapReply *rs,
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struct metaconn *lc,
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int i,
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LDAPMessage *e
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);
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int
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meta_back_search( Operation *op, SlapReply *rs )
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{
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struct metainfo *li = ( struct metainfo * )op->o_bd->be_private;
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struct metaconn *lc;
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struct metasingleconn *lsc;
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struct timeval tv = { 0, 0 };
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LDAPMessage *res = NULL, *e;
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int rc = 0, *msgid, sres = LDAP_SUCCESS;
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char *err = NULL;
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struct berval match = BER_BVNULL, mmatch = BER_BVNULL;
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BerVarray v2refs = NULL;
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int i, last = 0, candidates = 0, initial_candidates = 0,
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candidate_match = 0;
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dncookie dc;
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int is_scope = 0,
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is_filter = 0;
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/*
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* controls are set in ldap_back_dobind()
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*
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* FIXME: in case of values return filter, we might want
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* to map attrs and maybe rewrite value
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*/
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lc = meta_back_getconn( op, rs, META_OP_ALLOW_MULTIPLE,
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&op->o_req_ndn, NULL );
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if ( !lc ) {
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send_ldap_result( op, rs );
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return -1;
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}
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if ( !meta_back_dobind( lc, op ) ) {
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rs->sr_err = LDAP_OTHER;
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send_ldap_result( op, rs );
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return -1;
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}
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/*
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* Array of message id of each target
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*/
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msgid = ch_calloc( sizeof( int ), li->ntargets );
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if ( msgid == NULL ) {
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rs->sr_err = LDAP_OTHER;
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send_ldap_result( op, rs );
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return -1;
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}
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dc.conn = op->o_conn;
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dc.rs = rs;
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/*
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* Inits searches
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*/
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for ( i = 0, lsc = lc->conns; !META_LAST(lsc); ++i, ++lsc ) {
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struct berval realbase = op->o_req_dn;
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int realscope = op->ors_scope;
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ber_len_t suffixlen = 0;
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struct berval mbase = BER_BVNULL;
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struct berval mfilter = BER_BVNULL;
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char **mapped_attrs = NULL;
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if ( lsc->candidate != META_CANDIDATE ) {
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msgid[ i ] = -1;
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continue;
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}
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/* should we check return values? */
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if ( op->ors_deref != -1 ) {
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ldap_set_option( lsc->ld, LDAP_OPT_DEREF,
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( void * )&op->ors_deref);
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}
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if ( op->ors_tlimit != SLAP_NO_LIMIT ) {
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ldap_set_option( lsc->ld, LDAP_OPT_TIMELIMIT,
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( void * )&op->ors_tlimit);
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}
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if ( op->ors_slimit != SLAP_NO_LIMIT ) {
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ldap_set_option( lsc->ld, LDAP_OPT_SIZELIMIT,
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( void * )&op->ors_slimit);
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}
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dc.rwmap = &li->targets[ i ]->rwmap;
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/*
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* modifies the base according to the scope, if required
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*/
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suffixlen = li->targets[ i ]->suffix.bv_len;
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if ( suffixlen > op->o_req_ndn.bv_len ) {
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switch ( op->ors_scope ) {
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case LDAP_SCOPE_SUBTREE:
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/*
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* make the target suffix the new base
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* FIXME: this is very forgiving, because
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* illegal bases may be turned into
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* the suffix of the target.
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*/
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if ( dnIsSuffix( &li->targets[ i ]->suffix,
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&op->o_req_ndn ) ) {
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realbase = li->targets[ i ]->suffix;
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is_scope++;
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} else {
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/*
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* this target is no longer candidate
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*/
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msgid[ i ] = -1;
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goto new_candidate;
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}
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break;
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case LDAP_SCOPE_ONELEVEL:
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{
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struct berval rdn = li->targets[ i ]->suffix;
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rdn.bv_len -= op->o_req_ndn.bv_len + STRLENOF( "," );
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if ( dnIsOneLevelRDN( &rdn )
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&& dnIsSuffix( &li->targets[ i ]->suffix, &op->o_req_ndn ) )
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{
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/*
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* if there is exactly one level,
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* make the target suffix the new
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* base, and make scope "base"
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*/
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realbase = li->targets[ i ]->suffix;
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realscope = LDAP_SCOPE_BASE;
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is_scope++;
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break;
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} /* else continue with the next case */
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}
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case LDAP_SCOPE_BASE:
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/*
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* this target is no longer candidate
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*/
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msgid[ i ] = -1;
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goto new_candidate;
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}
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}
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/*
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* Rewrite the search base, if required
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*/
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dc.ctx = "searchBase";
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switch ( ldap_back_dn_massage( &dc, &realbase, &mbase ) ) {
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default:
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break;
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case REWRITE_REGEXEC_UNWILLING:
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rs->sr_err = LDAP_UNWILLING_TO_PERFORM;
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rs->sr_text = "Operation not allowed";
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send_ldap_result( op, rs );
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rc = -1;
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goto finish;
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case REWRITE_REGEXEC_ERR:
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#if 0
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rs->sr_err = LDAP_OTHER;
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rs->sr_text = "Rewrite error";
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send_ldap_result( op, rs );
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rc = -1;
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goto finish;
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#endif
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/*
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* this target is no longer candidate
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*/
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msgid[ i ] = -1;
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goto new_candidate;
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}
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/*
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* Maps filter
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*/
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rc = ldap_back_filter_map_rewrite( &dc,
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op->ors_filter,
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&mfilter, BACKLDAP_MAP );
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switch ( rc ) {
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case LDAP_SUCCESS:
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is_filter++;
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break;
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case LDAP_COMPARE_FALSE:
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rc = 0;
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default:
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/*
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* this target is no longer candidate
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*/
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msgid[ i ] = -1;
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goto new_candidate;
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}
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/*
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* Maps required attributes
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*/
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rc = ldap_back_map_attrs( &li->targets[ i ]->rwmap.rwm_at,
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op->ors_attrs, BACKLDAP_MAP,
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&mapped_attrs );
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if ( rc != LDAP_SUCCESS ) {
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/*
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* this target is no longer candidate
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*/
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msgid[ i ] = -1;
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goto new_candidate;
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}
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/*
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* Starts the search
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*/
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msgid[ i ] = ldap_search( lsc->ld, mbase.bv_val, realscope,
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mfilter.bv_val, mapped_attrs,
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op->ors_attrsonly );
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if ( mapped_attrs ) {
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free( mapped_attrs );
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mapped_attrs = NULL;
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}
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if ( mfilter.bv_val != op->ors_filterstr.bv_val ) {
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free( mfilter.bv_val );
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mfilter.bv_val = NULL;
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}
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if ( mbase.bv_val != realbase.bv_val ) {
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free( mbase.bv_val );
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mbase.bv_val = NULL;
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}
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if ( msgid[ i ] == -1 ) {
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continue;
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}
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++candidates;
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new_candidate:;
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}
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initial_candidates = candidates;
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/* We pull apart the ber result, stuff it into a slapd entry, and
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* let send_search_entry stuff it back into ber format. Slow & ugly,
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* but this is necessary for version matching, and for ACL processing.
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*/
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/*
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* In case there are no candidates, no cycle takes place...
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*
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* FIXME: we might use a queue, to balance the load
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* among the candidates
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*/
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for ( rc = 0; candidates > 0; ) {
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int ab, gotit = 0;
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/* check for abandon */
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ab = op->o_abandon;
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for ( i = 0, lsc = lc->conns; !META_LAST(lsc); lsc++, i++ ) {
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if ( msgid[ i ] == -1 ) {
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continue;
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}
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if ( ab ) {
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ldap_abandon( lsc->ld, msgid[ i ] );
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rc = 0;
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break;
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}
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if ( op->ors_slimit > 0
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&& rs->sr_nentries == op->ors_slimit ) {
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rs->sr_err = LDAP_SIZELIMIT_EXCEEDED;
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rs->sr_v2ref = v2refs;
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send_ldap_result( op, rs );
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goto finish;
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}
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/*
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* FIXME: handle time limit as well?
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* Note that target servers are likely
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* to handle it, so at some time we'll
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* get a LDAP_TIMELIMIT_EXCEEDED from
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* one of them ...
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*/
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rc = ldap_result( lsc->ld, msgid[ i ],
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0, &tv, &res );
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if ( rc == 0 ) {
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/* timeout exceeded */
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/* FIXME: res should not need to be freed */
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assert( res == NULL );
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continue;
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} else if ( rc == -1 ) {
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/* something REALLY bad happened! */
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( void )meta_clear_unused_candidates( li,
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lc, -1, 0 );
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rs->sr_err = LDAP_OTHER;
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rs->sr_v2ref = v2refs;
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send_ldap_result( op, rs );
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/* anything else needs be done? */
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/* FIXME: res should not need to be freed */
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assert( res == NULL );
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goto finish;
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} else if ( rc == LDAP_RES_SEARCH_ENTRY ) {
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e = ldap_first_entry( lsc->ld, res );
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meta_send_entry( op, rs, lc, i, e );
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ldap_msgfree( res );
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res = NULL;
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/*
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* If scope is BASE, we need to jump out
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* as soon as one entry is found; if
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* the target pool is properly crafted,
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* this should correspond to the sole
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* entry that has the base DN
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*/
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if ( op->ors_scope == LDAP_SCOPE_BASE
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&& rs->sr_nentries > 0 ) {
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candidates = 0;
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sres = LDAP_SUCCESS;
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break;
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}
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gotit = 1;
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} else if ( rc == LDAP_RES_SEARCH_REFERENCE ) {
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char **references = NULL;
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int cnt;
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/*
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* FIXME: should we collect references
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* and send them alltogether at the end?
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*/
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rc = ldap_parse_reference( lsc->ld, res,
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&references, &rs->sr_ctrls, 1 );
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res = NULL;
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if ( rc != LDAP_SUCCESS ) {
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continue;
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}
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if ( references == NULL ) {
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continue;
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}
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for ( cnt = 0; references[ cnt ]; cnt++ )
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/* NO OP */ ;
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rs->sr_ref = ch_calloc( cnt + 1, sizeof( struct berval ) );
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for ( cnt = 0; references[ cnt ]; cnt++ ) {
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rs->sr_ref[ cnt ].bv_val = references[ cnt ];
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rs->sr_ref[ cnt ].bv_len = strlen( references[ cnt ] );
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}
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/* ignore return value by now */
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( void )send_search_reference( op, rs );
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/* cleanup */
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if ( references ) {
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ldap_value_free( references );
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ch_free( rs->sr_ref );
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rs->sr_ref = NULL;
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}
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if ( rs->sr_ctrls ) {
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ldap_controls_free( rs->sr_ctrls );
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rs->sr_ctrls = NULL;
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}
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} else {
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rs->sr_err = ldap_result2error( lsc->ld,
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res, 1 );
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res = NULL;
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sres = slap_map_api2result( rs );
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if ( err != NULL ) {
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free( err );
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}
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ldap_get_option( lsc->ld,
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LDAP_OPT_ERROR_STRING, &err );
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if ( match.bv_val != NULL ) {
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free( match.bv_val );
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}
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ldap_get_option( lsc->ld,
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LDAP_OPT_MATCHED_DN, &match.bv_val );
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Debug( LDAP_DEBUG_ANY,
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"=>meta_back_search [%d] "
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"match=\"%s\" err=\"%s\"\n",
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i, match.bv_val, err );
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candidate_match++;
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last = i;
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rc = 0;
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/*
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* When no candidates are left,
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* the outer cycle finishes
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*/
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msgid[ i ] = -1;
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--candidates;
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}
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}
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if ( ab ) {
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goto finish;
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}
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if ( gotit == 0 ) {
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tv.tv_sec = 0;
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tv.tv_usec = 100000;
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ldap_pvt_thread_yield();
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} else {
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tv.tv_sec = 0;
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tv.tv_usec = 0;
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}
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}
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if ( rc == -1 ) {
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/*
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* FIXME: need a strategy to handle errors
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*/
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rc = meta_back_op_result( lc, op, rs );
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goto finish;
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}
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/*
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* Rewrite the matched portion of the search base, if required
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*
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* FIXME: only the last one gets caught!
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*/
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if ( candidate_match == initial_candidates
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&& match.bv_val != NULL && *match.bv_val ) {
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dc.ctx = "matchedDN";
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dc.rwmap = &li->targets[ last ]->rwmap;
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if ( ldap_back_dn_massage( &dc, &match, &mmatch ) ) {
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mmatch.bv_val = NULL;
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}
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}
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/*
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* In case we returned at least one entry, we return LDAP_SUCCESS
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* otherwise, the latter error code we got
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*
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* FIXME: we should handle error codes and return the more
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* important/reasonable
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*/
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if ( is_scope == 0 ) {
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sres = LDAP_NO_SUCH_OBJECT;
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}
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if ( sres == LDAP_SUCCESS && v2refs ) {
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sres = LDAP_REFERRAL;
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}
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rs->sr_err = sres;
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rs->sr_matched = mmatch.bv_val;
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rs->sr_v2ref = v2refs;
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send_ldap_result( op, rs );
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rs->sr_matched = NULL;
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rs->sr_v2ref = NULL;
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finish:;
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if ( match.bv_val ) {
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if ( mmatch.bv_val != match.bv_val ) {
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free( mmatch.bv_val );
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}
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free( match.bv_val );
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}
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if ( err ) {
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free( err );
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}
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if ( msgid ) {
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ch_free( msgid );
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}
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return rc;
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}
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static int
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meta_send_entry(
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Operation *op,
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SlapReply *rs,
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struct metaconn *lc,
|
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int target,
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LDAPMessage *e
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)
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{
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struct metainfo *li = ( struct metainfo * )op->o_bd->be_private;
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struct berval a, mapped;
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Entry ent = {0};
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BerElement ber = *e->lm_ber;
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Attribute *attr, **attrp;
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struct berval *bv, bdn;
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const char *text;
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dncookie dc;
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|
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if ( ber_scanf( &ber, "{m{", &bdn ) == LBER_ERROR ) {
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return LDAP_DECODING_ERROR;
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}
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|
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/*
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* Rewrite the dn of the result, if needed
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*/
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dc.rwmap = &li->targets[ target ]->rwmap;
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dc.conn = op->o_conn;
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dc.rs = rs;
|
|
dc.ctx = "searchResult";
|
|
|
|
rs->sr_err = ldap_back_dn_massage( &dc, &bdn, &ent.e_name );
|
|
if ( rs->sr_err != LDAP_SUCCESS) {
|
|
return rs->sr_err;
|
|
}
|
|
|
|
/*
|
|
* Note: this may fail if the target host(s) schema differs
|
|
* from the one known to the meta, and a DN with unknown
|
|
* attributes is returned.
|
|
*
|
|
* FIXME: should we log anything, or delegate to dnNormalize?
|
|
*/
|
|
if ( dnNormalize( 0, NULL, NULL, &ent.e_name, &ent.e_nname,
|
|
&op->o_tmpmemctx ) != LDAP_SUCCESS )
|
|
{
|
|
return LDAP_INVALID_DN_SYNTAX;
|
|
}
|
|
|
|
/*
|
|
* cache dn
|
|
*/
|
|
if ( li->cache.ttl != META_DNCACHE_DISABLED ) {
|
|
( void )meta_dncache_update_entry( &li->cache,
|
|
&ent.e_nname, target );
|
|
}
|
|
|
|
attrp = &ent.e_attrs;
|
|
|
|
dc.ctx = "searchAttrDN";
|
|
while ( ber_scanf( &ber, "{m", &a ) != LBER_ERROR ) {
|
|
int last = 0;
|
|
|
|
ldap_back_map( &li->targets[ target ]->rwmap.rwm_at,
|
|
&a, &mapped, BACKLDAP_REMAP );
|
|
if ( mapped.bv_val == NULL || mapped.bv_val[0] == '\0' ) {
|
|
continue;
|
|
}
|
|
attr = ( Attribute * )ch_malloc( sizeof( Attribute ) );
|
|
if ( attr == NULL ) {
|
|
continue;
|
|
}
|
|
attr->a_flags = 0;
|
|
attr->a_next = 0;
|
|
attr->a_desc = NULL;
|
|
if ( slap_bv2ad( &mapped, &attr->a_desc, &text )
|
|
!= LDAP_SUCCESS) {
|
|
if ( slap_bv2undef_ad( &mapped, &attr->a_desc, &text )
|
|
!= LDAP_SUCCESS) {
|
|
Debug( LDAP_DEBUG_ANY,
|
|
"slap_bv2undef_ad(%s): "
|
|
"%s\n%s", mapped.bv_val, text, "" );
|
|
ch_free( attr );
|
|
continue;
|
|
}
|
|
}
|
|
|
|
/* no subschemaSubentry */
|
|
if ( attr->a_desc == slap_schema.si_ad_subschemaSubentry ) {
|
|
|
|
/*
|
|
* We eat target's subschemaSubentry because
|
|
* a search for this value is likely not
|
|
* to resolve to the appropriate backend;
|
|
* later, the local subschemaSubentry is
|
|
* added.
|
|
*/
|
|
( void )ber_scanf( &ber, "x" /* [W] */ );
|
|
|
|
ch_free(attr);
|
|
continue;
|
|
}
|
|
|
|
if ( ber_scanf( &ber, "[W]", &attr->a_vals ) == LBER_ERROR
|
|
|| attr->a_vals == NULL ) {
|
|
attr->a_vals = &slap_dummy_bv;
|
|
|
|
} else if ( attr->a_desc == slap_schema.si_ad_objectClass
|
|
|| attr->a_desc == slap_schema.si_ad_structuralObjectClass ) {
|
|
|
|
for ( last = 0; attr->a_vals[ last ].bv_val; ++last );
|
|
|
|
for ( bv = attr->a_vals; bv->bv_val; bv++ ) {
|
|
ldap_back_map( &li->targets[ target ]->rwmap.rwm_oc,
|
|
bv, &mapped, BACKLDAP_REMAP );
|
|
if ( mapped.bv_val == NULL || mapped.bv_val[0] == '\0') {
|
|
free( bv->bv_val );
|
|
bv->bv_val = NULL;
|
|
if ( --last < 0 ) {
|
|
break;
|
|
}
|
|
*bv = attr->a_vals[ last ];
|
|
attr->a_vals[ last ].bv_val = NULL;
|
|
bv--;
|
|
|
|
} else if ( mapped.bv_val != bv->bv_val ) {
|
|
free( bv->bv_val );
|
|
ber_dupbv( bv, &mapped );
|
|
}
|
|
}
|
|
/*
|
|
* It is necessary to try to rewrite attributes with
|
|
* dn syntax because they might be used in ACLs as
|
|
* members of groups; since ACLs are applied to the
|
|
* rewritten stuff, no dn-based subecj clause could
|
|
* be used at the ldap backend side (see
|
|
* http://www.OpenLDAP.org/faq/data/cache/452.html)
|
|
* The problem can be overcome by moving the dn-based
|
|
* ACLs to the target directory server, and letting
|
|
* everything pass thru the ldap backend.
|
|
*/
|
|
} else if ( attr->a_desc->ad_type->sat_syntax ==
|
|
slap_schema.si_syn_distinguishedName ) {
|
|
ldap_dnattr_result_rewrite( &dc, attr->a_vals );
|
|
}
|
|
|
|
if ( last && attr->a_desc->ad_type->sat_equality &&
|
|
attr->a_desc->ad_type->sat_equality->smr_normalize ) {
|
|
int i;
|
|
|
|
attr->a_nvals = ch_malloc((last + 1)*sizeof(struct berval));
|
|
for ( i = 0; i<last; i++ ) {
|
|
attr->a_desc->ad_type->sat_equality->smr_normalize(
|
|
SLAP_MR_VALUE_OF_ATTRIBUTE_SYNTAX,
|
|
attr->a_desc->ad_type->sat_syntax,
|
|
attr->a_desc->ad_type->sat_equality,
|
|
&attr->a_vals[i], &attr->a_nvals[i],
|
|
op->o_tmpmemctx );
|
|
}
|
|
attr->a_nvals[i].bv_val = NULL;
|
|
attr->a_nvals[i].bv_len = 0;
|
|
} else {
|
|
attr->a_nvals = attr->a_vals;
|
|
}
|
|
|
|
*attrp = attr;
|
|
attrp = &attr->a_next;
|
|
}
|
|
rs->sr_entry = &ent;
|
|
rs->sr_attrs = op->ors_attrs;
|
|
rs->sr_flags = 0;
|
|
send_search_entry( op, rs );
|
|
rs->sr_entry = NULL;
|
|
rs->sr_attrs = NULL;
|
|
while ( ent.e_attrs ) {
|
|
attr = ent.e_attrs;
|
|
ent.e_attrs = attr->a_next;
|
|
if ( attr->a_vals != &slap_dummy_bv ) {
|
|
ber_bvarray_free( attr->a_vals );
|
|
}
|
|
free( attr );
|
|
}
|
|
|
|
if ( ent.e_dn && ent.e_dn != bdn.bv_val ) {
|
|
free( ent.e_dn );
|
|
}
|
|
if ( ent.e_ndn ) {
|
|
free( ent.e_ndn );
|
|
}
|
|
|
|
return LDAP_SUCCESS;
|
|
}
|
|
|
|
|