diff options
Diffstat (limited to 'servers/slapd/backend.c')
| -rw-r--r-- | servers/slapd/backend.c | 1983 |
1 files changed, 1983 insertions, 0 deletions
diff --git a/servers/slapd/backend.c b/servers/slapd/backend.c new file mode 100644 index 0000000..d40b734 --- /dev/null +++ b/servers/slapd/backend.c @@ -0,0 +1,1983 @@ +/* backend.c - routines for dealing with back-end databases */ +/* $OpenLDAP$ */ +/* This work is part of OpenLDAP Software <http://www.openldap.org/>. + * + * Copyright 1998-2021 The OpenLDAP Foundation. + * All rights reserved. + * + * Redistribution and use in source and binary forms, with or without + * modification, are permitted only as authorized by the OpenLDAP + * Public License. + * + * A copy of this license is available in the file LICENSE in the + * top-level directory of the distribution or, alternatively, at + * <http://www.OpenLDAP.org/license.html>. + */ +/* Portions Copyright (c) 1995 Regents of the University of Michigan. + * All rights reserved. + * + * Redistribution and use in source and binary forms are permitted + * provided that this notice is preserved and that due credit is given + * to the University of Michigan at Ann Arbor. The name of the University + * may not be used to endorse or promote products derived from this + * software without specific prior written permission. This software + * is provided ``as is'' without express or implied warranty. + */ + + +#include "portable.h" + +#include <stdio.h> + +#include <ac/string.h> +#include <ac/socket.h> +#include <sys/stat.h> + +#include "slap.h" +#include "config.h" +#include "lutil.h" +#include "lber_pvt.h" + +/* + * If a module is configured as dynamic, its header should not + * get included into slapd. While this is a general rule and does + * not have much of an effect in UNIX, this rule should be adhered + * to for Windows, where dynamic object code should not be implicitly + * imported into slapd without appropriate __declspec(dllimport) directives. + */ + +int nBackendInfo = 0; +slap_bi_head backendInfo = LDAP_STAILQ_HEAD_INITIALIZER(backendInfo); + +int nBackendDB = 0; +slap_be_head backendDB = LDAP_STAILQ_HEAD_INITIALIZER(backendDB); + +static int +backend_init_controls( BackendInfo *bi ) +{ + if ( bi->bi_controls ) { + int i; + + for ( i = 0; bi->bi_controls[ i ]; i++ ) { + int cid; + + if ( slap_find_control_id( bi->bi_controls[ i ], &cid ) + == LDAP_CONTROL_NOT_FOUND ) + { + if ( !( slapMode & SLAP_TOOL_MODE ) ) { + assert( 0 ); + } + + return -1; + } + + bi->bi_ctrls[ cid ] = 1; + } + } + + return 0; +} + +int backend_init(void) +{ + int rc = -1; + BackendInfo *bi; + + if((nBackendInfo != 0) || !LDAP_STAILQ_EMPTY(&backendInfo)) { + /* already initialized */ + Debug( LDAP_DEBUG_ANY, + "backend_init: already initialized\n", 0, 0, 0 ); + return -1; + } + + for( bi=slap_binfo; bi->bi_type != NULL; bi++,nBackendInfo++ ) { + assert( bi->bi_init != 0 ); + + rc = bi->bi_init( bi ); + + if(rc != 0) { + Debug( LDAP_DEBUG_ANY, + "backend_init: initialized for type \"%s\"\n", + bi->bi_type, 0, 0 ); + /* destroy those we've already inited */ + for( nBackendInfo--; + nBackendInfo >= 0 ; + nBackendInfo-- ) + { + if ( slap_binfo[nBackendInfo].bi_destroy ) { + slap_binfo[nBackendInfo].bi_destroy( + &slap_binfo[nBackendInfo] ); + } + } + return rc; + } + + LDAP_STAILQ_INSERT_TAIL(&backendInfo, bi, bi_next); + } + + if ( nBackendInfo > 0) { + return 0; + } + +#ifdef SLAPD_MODULES + return 0; +#else + + Debug( LDAP_DEBUG_ANY, + "backend_init: failed\n", + 0, 0, 0 ); + + return rc; +#endif /* SLAPD_MODULES */ +} + +int backend_add(BackendInfo *aBackendInfo) +{ + int rc = 0; + + if ( aBackendInfo->bi_init == NULL ) { + Debug( LDAP_DEBUG_ANY, "backend_add: " + "backend type \"%s\" does not have the (mandatory)init function\n", + aBackendInfo->bi_type, 0, 0 ); + return -1; + } + + rc = aBackendInfo->bi_init(aBackendInfo); + if ( rc != 0) { + Debug( LDAP_DEBUG_ANY, + "backend_add: initialization for type \"%s\" failed\n", + aBackendInfo->bi_type, 0, 0 ); + return rc; + } + + (void)backend_init_controls( aBackendInfo ); + + /* now add the backend type to the Backend Info List */ + LDAP_STAILQ_INSERT_TAIL( &backendInfo, aBackendInfo, bi_next ); + nBackendInfo++; + return 0; +} + +static int +backend_set_controls( BackendDB *be ) +{ + BackendInfo *bi = be->bd_info; + + /* back-relay takes care of itself; so may do other */ + if ( overlay_is_over( be ) ) { + bi = ((slap_overinfo *)be->bd_info->bi_private)->oi_orig; + } + + if ( bi->bi_controls ) { + if ( be->be_ctrls[ SLAP_MAX_CIDS ] == 0 ) { + AC_MEMCPY( be->be_ctrls, bi->bi_ctrls, + sizeof( be->be_ctrls ) ); + be->be_ctrls[ SLAP_MAX_CIDS ] = 1; + + } else { + int i; + + for ( i = 0; i < SLAP_MAX_CIDS; i++ ) { + if ( bi->bi_ctrls[ i ] ) { + be->be_ctrls[ i ] = bi->bi_ctrls[ i ]; + } + } + } + + } + + return 0; +} + +/* startup a specific backend database */ +int backend_startup_one(Backend *be, ConfigReply *cr) +{ + int rc = 0; + + assert( be != NULL ); + + be->be_pending_csn_list = (struct be_pcl *) + ch_calloc( 1, sizeof( struct be_pcl ) ); + + LDAP_TAILQ_INIT( be->be_pending_csn_list ); + + Debug( LDAP_DEBUG_TRACE, + "backend_startup_one: starting \"%s\"\n", + be->be_suffix ? be->be_suffix[0].bv_val : "(unknown)", + 0, 0 ); + + /* set database controls */ + (void)backend_set_controls( be ); + +#if 0 + if ( !BER_BVISEMPTY( &be->be_rootndn ) + && select_backend( &be->be_rootndn, 0 ) == be + && BER_BVISNULL( &be->be_rootpw ) ) + { + /* warning: if rootdn entry is created, + * it can take rootdn privileges; + * set empty rootpw to prevent */ + } +#endif + + if ( be->bd_info->bi_db_open ) { + rc = be->bd_info->bi_db_open( be, cr ); + if ( rc == 0 ) { + (void)backend_set_controls( be ); + + } else { + char *type = be->bd_info->bi_type; + char *suffix = "(null)"; + + if ( overlay_is_over( be ) ) { + slap_overinfo *oi = (slap_overinfo *)be->bd_info->bi_private; + type = oi->oi_orig->bi_type; + } + + if ( be->be_suffix != NULL && !BER_BVISNULL( &be->be_suffix[0] ) ) { + suffix = be->be_suffix[0].bv_val; + } + + Debug( LDAP_DEBUG_ANY, + "backend_startup_one (type=%s, suffix=\"%s\"): " + "bi_db_open failed! (%d)\n", + type, suffix, rc ); + } + } + + return rc; +} + +int backend_startup(Backend *be) +{ + int i; + int rc = 0; + BackendInfo *bi; + ConfigReply cr={0, ""}; + + if( ! ( nBackendDB > 0 ) ) { + /* no databases */ + Debug( LDAP_DEBUG_ANY, + "backend_startup: %d databases to startup.\n", + nBackendDB, 0, 0 ); + return 1; + } + + if(be != NULL) { + if ( be->bd_info->bi_open ) { + rc = be->bd_info->bi_open( be->bd_info ); + if ( rc != 0 ) { + Debug( LDAP_DEBUG_ANY, + "backend_startup: bi_open failed!\n", + 0, 0, 0 ); + + return rc; + } + } + + return backend_startup_one( be, &cr ); + } + + /* open frontend, if required */ + if ( frontendDB->bd_info->bi_db_open ) { + rc = frontendDB->bd_info->bi_db_open( frontendDB, &cr ); + if ( rc != 0 ) { + Debug( LDAP_DEBUG_ANY, + "backend_startup: bi_db_open(frontend) failed! (%d)\n", + rc, 0, 0 ); + return rc; + } + } + + /* open each backend type */ + i = -1; + LDAP_STAILQ_FOREACH(bi, &backendInfo, bi_next) { + i++; + if( bi->bi_nDB == 0) { + /* no database of this type, don't open */ + continue; + } + + if( bi->bi_open ) { + rc = bi->bi_open( bi ); + if ( rc != 0 ) { + Debug( LDAP_DEBUG_ANY, + "backend_startup: bi_open %d (%s) failed!\n", + i, bi->bi_type, 0 ); + return rc; + } + } + + (void)backend_init_controls( bi ); + } + + /* open each backend database */ + i = -1; + LDAP_STAILQ_FOREACH(be, &backendDB, be_next) { + i++; + if ( be->be_suffix == NULL ) { + Debug( LDAP_DEBUG_ANY, + "backend_startup: warning, database %d (%s) " + "has no suffix\n", + i, be->bd_info->bi_type, 0 ); + } + + rc = backend_startup_one( be, &cr ); + + if ( rc ) return rc; + } + + return rc; +} + +int backend_num( Backend *be ) +{ + int i = 0; + BackendDB *b2; + + if( be == NULL ) return -1; + + LDAP_STAILQ_FOREACH( b2, &backendDB, be_next ) { + if( be == b2 ) return i; + i++; + } + return -1; +} + +int backend_shutdown( Backend *be ) +{ + int rc = 0; + BackendInfo *bi; + + if( be != NULL ) { + /* shutdown a specific backend database */ + + if ( be->bd_info->bi_nDB == 0 ) { + /* no database of this type, we never opened it */ + return 0; + } + + if ( be->bd_info->bi_db_close ) { + rc = be->bd_info->bi_db_close( be, NULL ); + if ( rc ) return rc; + } + + if( be->bd_info->bi_close ) { + rc = be->bd_info->bi_close( be->bd_info ); + if ( rc ) return rc; + } + + return 0; + } + + /* close each backend database */ + LDAP_STAILQ_FOREACH( be, &backendDB, be_next ) { + if ( be->bd_info->bi_db_close ) { + be->bd_info->bi_db_close( be, NULL ); + } + + if(rc != 0) { + Debug( LDAP_DEBUG_ANY, + "backend_close: bi_db_close %s failed!\n", + be->be_type, 0, 0 ); + } + } + + /* close each backend type */ + LDAP_STAILQ_FOREACH( bi, &backendInfo, bi_next ) { + if( bi->bi_nDB == 0 ) { + /* no database of this type */ + continue; + } + + if( bi->bi_close ) { + bi->bi_close( bi ); + } + } + + /* close frontend, if required */ + if ( frontendDB->bd_info->bi_db_close ) { + rc = frontendDB->bd_info->bi_db_close ( frontendDB, NULL ); + if ( rc != 0 ) { + Debug( LDAP_DEBUG_ANY, + "backend_startup: bi_db_close(frontend) failed! (%d)\n", + rc, 0, 0 ); + } + } + + return 0; +} + +/* + * This function is supposed to be the exact counterpart + * of backend_startup_one(), although this one calls bi_db_destroy() + * while backend_startup_one() calls bi_db_open(). + * + * Make sure backend_stopdown_one() destroys resources allocated + * by backend_startup_one(); only call backend_destroy_one() when + * all stuff in a BackendDB needs to be destroyed + */ +void +backend_stopdown_one( BackendDB *bd ) +{ + if ( bd->be_pending_csn_list ) { + struct slap_csn_entry *csne; + csne = LDAP_TAILQ_FIRST( bd->be_pending_csn_list ); + while ( csne ) { + struct slap_csn_entry *tmp_csne = csne; + + LDAP_TAILQ_REMOVE( bd->be_pending_csn_list, csne, ce_csn_link ); + ch_free( csne->ce_csn.bv_val ); + csne = LDAP_TAILQ_NEXT( csne, ce_csn_link ); + ch_free( tmp_csne ); + } + ch_free( bd->be_pending_csn_list ); + } + + if ( bd->bd_info->bi_db_destroy ) { + bd->bd_info->bi_db_destroy( bd, NULL ); + } +} + +void backend_destroy_one( BackendDB *bd, int dynamic ) +{ + if ( dynamic ) { + LDAP_STAILQ_REMOVE(&backendDB, bd, BackendDB, be_next ); + } + + if ( bd->be_syncinfo ) { + syncinfo_free( bd->be_syncinfo, 1 ); + } + + backend_stopdown_one( bd ); + + ber_bvarray_free( bd->be_suffix ); + ber_bvarray_free( bd->be_nsuffix ); + if ( !BER_BVISNULL( &bd->be_rootdn ) ) { + free( bd->be_rootdn.bv_val ); + } + if ( !BER_BVISNULL( &bd->be_rootndn ) ) { + free( bd->be_rootndn.bv_val ); + } + if ( !BER_BVISNULL( &bd->be_rootpw ) ) { + free( bd->be_rootpw.bv_val ); + } + acl_destroy( bd->be_acl ); + limits_destroy( bd->be_limits ); + if ( bd->be_extra_anlist ) { + anlist_free( bd->be_extra_anlist, 1, NULL ); + } + if ( !BER_BVISNULL( &bd->be_update_ndn ) ) { + ch_free( bd->be_update_ndn.bv_val ); + } + if ( bd->be_update_refs ) { + ber_bvarray_free( bd->be_update_refs ); + } + + ldap_pvt_thread_mutex_destroy( &bd->be_pcl_mutex ); + + if ( dynamic ) { + free( bd ); + } +} + +int backend_destroy(void) +{ + BackendDB *bd; + BackendInfo *bi; + + /* destroy each backend database */ + while (( bd = LDAP_STAILQ_FIRST(&backendDB))) { + backend_destroy_one( bd, 1 ); + } + + /* destroy each backend type */ + LDAP_STAILQ_FOREACH( bi, &backendInfo, bi_next ) { + if( bi->bi_destroy ) { + bi->bi_destroy( bi ); + } + } + + nBackendInfo = 0; + LDAP_STAILQ_INIT(&backendInfo); + + /* destroy frontend database */ + bd = frontendDB; + if ( bd ) { + if ( bd->bd_info->bi_db_destroy ) { + bd->bd_info->bi_db_destroy( bd, NULL ); + } + ber_bvarray_free( bd->be_suffix ); + ber_bvarray_free( bd->be_nsuffix ); + if ( !BER_BVISNULL( &bd->be_rootdn ) ) { + free( bd->be_rootdn.bv_val ); + } + if ( !BER_BVISNULL( &bd->be_rootndn ) ) { + free( bd->be_rootndn.bv_val ); + } + if ( !BER_BVISNULL( &bd->be_rootpw ) ) { + free( bd->be_rootpw.bv_val ); + } + acl_destroy( bd->be_acl ); + frontendDB = NULL; + } + + return 0; +} + +BackendInfo* backend_info(const char *type) +{ + BackendInfo *bi; + + /* search for the backend type */ + LDAP_STAILQ_FOREACH(bi,&backendInfo,bi_next) { + if( strcasecmp(bi->bi_type, type) == 0 ) { + return bi; + } + } + + return NULL; +} + +void +backend_db_insert( + BackendDB *be, + int idx +) +{ + /* If idx < 0, just add to end of list */ + if ( idx < 0 ) { + LDAP_STAILQ_INSERT_TAIL(&backendDB, be, be_next); + } else if ( idx == 0 ) { + LDAP_STAILQ_INSERT_HEAD(&backendDB, be, be_next); + } else { + int i; + BackendDB *b2; + + b2 = LDAP_STAILQ_FIRST(&backendDB); + idx--; + for (i=0; i<idx; i++) { + b2 = LDAP_STAILQ_NEXT(b2, be_next); + } + LDAP_STAILQ_INSERT_AFTER(&backendDB, b2, be, be_next); + } +} + +void +backend_db_move( + BackendDB *be, + int idx +) +{ + LDAP_STAILQ_REMOVE(&backendDB, be, BackendDB, be_next); + backend_db_insert(be, idx); +} + +BackendDB * +backend_db_init( + const char *type, + BackendDB *b0, + int idx, + ConfigReply *cr) +{ + BackendInfo *bi = backend_info(type); + BackendDB *be = b0; + int rc = 0; + + if( bi == NULL ) { + fprintf( stderr, "Unrecognized database type (%s)\n", type ); + return NULL; + } + + /* If be is provided, treat it as private. Otherwise allocate + * one and add it to the global list. + */ + if ( !be ) { + be = ch_calloc( 1, sizeof(Backend) ); + /* Just append */ + if ( idx >= nbackends ) + idx = -1; + nbackends++; + backend_db_insert( be, idx ); + } + + be->bd_info = bi; + be->bd_self = be; + + be->be_def_limit = frontendDB->be_def_limit; + be->be_dfltaccess = frontendDB->be_dfltaccess; + + be->be_restrictops = frontendDB->be_restrictops; + be->be_requires = frontendDB->be_requires; + be->be_ssf_set = frontendDB->be_ssf_set; + + ldap_pvt_thread_mutex_init( &be->be_pcl_mutex ); + + /* assign a default depth limit for alias deref */ + be->be_max_deref_depth = SLAPD_DEFAULT_MAXDEREFDEPTH; + + if ( bi->bi_db_init ) { + rc = bi->bi_db_init( be, cr ); + } + + if ( rc != 0 ) { + fprintf( stderr, "database init failed (%s)\n", type ); + /* If we created and linked this be, remove it and free it */ + if ( !b0 ) { + LDAP_STAILQ_REMOVE(&backendDB, be, BackendDB, be_next); + ldap_pvt_thread_mutex_destroy( &be->be_pcl_mutex ); + ch_free( be ); + be = NULL; + nbackends--; + } + } else { + if ( !bi->bi_nDB ) { + backend_init_controls( bi ); + } + bi->bi_nDB++; + } + return( be ); +} + +void +be_db_close( void ) +{ + BackendDB *be; + + LDAP_STAILQ_FOREACH( be, &backendDB, be_next ) { + if ( be->bd_info->bi_db_close ) { + be->bd_info->bi_db_close( be, NULL ); + } + } + + if ( frontendDB->bd_info->bi_db_close ) { + frontendDB->bd_info->bi_db_close( frontendDB, NULL ); + } + +} + +Backend * +select_backend( + struct berval * dn, + int noSubs ) +{ + int j; + ber_len_t len, dnlen = dn->bv_len; + Backend *be; + + LDAP_STAILQ_FOREACH( be, &backendDB, be_next ) { + if ( be->be_nsuffix == NULL || SLAP_DBHIDDEN( be )) { + continue; + } + + for ( j = 0; !BER_BVISNULL( &be->be_nsuffix[j] ); j++ ) + { + if ( ( SLAP_GLUE_SUBORDINATE( be ) ) && noSubs ) + { + continue; + } + + len = be->be_nsuffix[j].bv_len; + + if ( len > dnlen ) { + /* suffix is longer than DN */ + continue; + } + + /* + * input DN is normalized, so the separator check + * need not look at escaping + */ + if ( len && len < dnlen && + !DN_SEPARATOR( dn->bv_val[(dnlen-len)-1] )) + { + continue; + } + + if ( strcmp( be->be_nsuffix[j].bv_val, + &dn->bv_val[dnlen-len] ) == 0 ) + { + return be; + } + } + } + + return be; +} + +int +be_issuffix( + Backend *be, + struct berval *bvsuffix ) +{ + int i; + + if ( be->be_nsuffix == NULL ) { + return 0; + } + + for ( i = 0; !BER_BVISNULL( &be->be_nsuffix[i] ); i++ ) { + if ( bvmatch( &be->be_nsuffix[i], bvsuffix ) ) { + return 1; + } + } + + return 0; +} + +int +be_issubordinate( + Backend *be, + struct berval *bvsubordinate ) +{ + int i; + + if ( be->be_nsuffix == NULL ) { + return 0; + } + + for ( i = 0; !BER_BVISNULL( &be->be_nsuffix[i] ); i++ ) { + if ( dnIsSuffix( bvsubordinate, &be->be_nsuffix[i] ) ) { + return 1; + } + } + + return 0; +} + +int +be_isroot_dn( Backend *be, struct berval *ndn ) +{ + if ( BER_BVISEMPTY( ndn ) || BER_BVISEMPTY( &be->be_rootndn ) ) { + return 0; + } + + return dn_match( &be->be_rootndn, ndn ); +} + +int +be_slurp_update( Operation *op ) +{ + return ( SLAP_SLURP_SHADOW( op->o_bd ) && + be_isupdate_dn( op->o_bd, &op->o_ndn ) ); +} + +int +be_shadow_update( Operation *op ) +{ + /* This assumes that all internal ops (connid <= -1000) on a syncrepl + * database are syncrepl operations. + */ + return ( ( SLAP_SYNC_SHADOW( op->o_bd ) && SLAPD_SYNC_IS_SYNCCONN( op->o_connid ) ) || + ( SLAP_SHADOW( op->o_bd ) && be_isupdate_dn( op->o_bd, &op->o_ndn ) ) ); +} + +int +be_isupdate_dn( Backend *be, struct berval *ndn ) +{ + if ( BER_BVISEMPTY( ndn ) || BER_BVISEMPTY( &be->be_update_ndn ) ) { + return 0; + } + + return dn_match( &be->be_update_ndn, ndn ); +} + +struct berval * +be_root_dn( Backend *be ) +{ + return &be->be_rootdn; +} + +int +be_isroot( Operation *op ) +{ + return be_isroot_dn( op->o_bd, &op->o_ndn ); +} + +int +be_isroot_pw( Operation *op ) +{ + return be_rootdn_bind( op, NULL ) == LDAP_SUCCESS; +} + +/* + * checks if binding as rootdn + * + * return value: + * SLAP_CB_CONTINUE if not the rootdn, or if rootpw is null + * LDAP_SUCCESS if rootdn & rootpw + * LDAP_INVALID_CREDENTIALS if rootdn & !rootpw + * + * if rs != NULL + * if LDAP_SUCCESS, op->orb_edn is set + * if LDAP_INVALID_CREDENTIALS, response is sent to client + */ +int +be_rootdn_bind( Operation *op, SlapReply *rs ) +{ + int rc; +#ifdef SLAPD_SPASSWD + void *old_authctx = NULL; +#endif + + assert( op->o_tag == LDAP_REQ_BIND ); + assert( op->orb_method == LDAP_AUTH_SIMPLE ); + + if ( !be_isroot_dn( op->o_bd, &op->o_req_ndn ) ) { + return SLAP_CB_CONTINUE; + } + + if ( BER_BVISNULL( &op->o_bd->be_rootpw ) ) { + /* give the database a chance */ + return SLAP_CB_CONTINUE; + } + + if ( BER_BVISEMPTY( &op->o_bd->be_rootpw ) ) { + /* rootdn bind explicitly disallowed */ + rc = LDAP_INVALID_CREDENTIALS; + if ( rs ) { + goto send_result; + } + + return rc; + } + +#ifdef SLAPD_SPASSWD + ldap_pvt_thread_pool_setkey( op->o_threadctx, (void *)slap_sasl_bind, + op->o_conn->c_sasl_authctx, 0, &old_authctx, NULL ); +#endif + + rc = lutil_passwd( &op->o_bd->be_rootpw, &op->orb_cred, NULL, NULL ); + +#ifdef SLAPD_SPASSWD + ldap_pvt_thread_pool_setkey( op->o_threadctx, (void *)slap_sasl_bind, + old_authctx, 0, NULL, NULL ); +#endif + + rc = ( rc == 0 ? LDAP_SUCCESS : LDAP_INVALID_CREDENTIALS ); + if ( rs ) { +send_result:; + rs->sr_err = rc; + + Debug( LDAP_DEBUG_TRACE, "%s: rootdn=\"%s\" bind%s\n", + op->o_log_prefix, op->o_bd->be_rootdn.bv_val, + rc == LDAP_SUCCESS ? " succeeded" : " failed" ); + + if ( rc == LDAP_SUCCESS ) { + /* Set to the pretty rootdn */ + ber_dupbv( &op->orb_edn, &op->o_bd->be_rootdn ); + + } else { + send_ldap_result( op, rs ); + } + } + + return rc; +} + +int +be_entry_release_rw( + Operation *op, + Entry *e, + int rw ) +{ + if ( op->o_bd->be_release ) { + /* free and release entry from backend */ + return op->o_bd->be_release( op, e, rw ); + } else { + /* free entry */ + entry_free( e ); + return 0; + } +} + +int +backend_unbind( Operation *op, SlapReply *rs ) +{ + BackendDB *be; + + LDAP_STAILQ_FOREACH( be, &backendDB, be_next ) { + if ( be->be_unbind ) { + op->o_bd = be; + be->be_unbind( op, rs ); + } + } + + return 0; +} + +int +backend_connection_init( + Connection *conn ) +{ + BackendDB *be; + + LDAP_STAILQ_FOREACH( be, &backendDB, be_next ) { + if ( be->be_connection_init ) { + be->be_connection_init( be, conn ); + } + } + + return 0; +} + +int +backend_connection_destroy( + Connection *conn ) +{ + BackendDB *be; + + LDAP_STAILQ_FOREACH( be, &backendDB, be_next ) { + if ( be->be_connection_destroy ) { + be->be_connection_destroy( be, conn); + } + } + + return 0; +} + +int +backend_check_controls( + Operation *op, + SlapReply *rs ) +{ + LDAPControl **ctrls = op->o_ctrls; + rs->sr_err = LDAP_SUCCESS; + + if( ctrls ) { + for( ; *ctrls != NULL ; ctrls++ ) { + int cid; + + switch ( slap_global_control( op, (*ctrls)->ldctl_oid, &cid ) ) { + case LDAP_CONTROL_NOT_FOUND: + /* unrecognized control */ + if ( (*ctrls)->ldctl_iscritical ) { + /* should not be reachable */ + Debug( LDAP_DEBUG_ANY, "backend_check_controls: " + "unrecognized critical control: %s\n", + (*ctrls)->ldctl_oid, 0, 0 ); + assert( 0 ); + } else { + Debug( LDAP_DEBUG_TRACE, "backend_check_controls: " + "unrecognized non-critical control: %s\n", + (*ctrls)->ldctl_oid, 0, 0 ); + } + break; + + case LDAP_COMPARE_FALSE: + if ( !op->o_bd->be_ctrls[cid] && (*ctrls)->ldctl_iscritical ) { +#ifdef SLAP_CONTROL_X_WHATFAILED + if ( get_whatFailed( op ) ) { + char *oids[ 2 ]; + oids[ 0 ] = (*ctrls)->ldctl_oid; + oids[ 1 ] = NULL; + slap_ctrl_whatFailed_add( op, rs, oids ); + } +#endif + /* RFC 4511 allows unavailableCriticalExtension to be + * returned when the server is unwilling to perform + * an operation extended by a recognized critical + * control. + */ + rs->sr_text = "critical control unavailable in context"; + rs->sr_err = LDAP_UNAVAILABLE_CRITICAL_EXTENSION; + goto done; + } + break; + + case LDAP_COMPARE_TRUE: + break; + + default: + /* unreachable */ + Debug( LDAP_DEBUG_ANY, + "backend_check_controls: unable to check control: %s\n", + (*ctrls)->ldctl_oid, 0, 0 ); + assert( 0 ); + + rs->sr_text = "unable to check control"; + rs->sr_err = LDAP_OTHER; + goto done; + } + } + } + +#if 0 /* temporarily removed */ + /* check should be generalized */ + if( get_relax(op) && !be_isroot(op)) { + rs->sr_text = "requires manager authorization"; + rs->sr_err = LDAP_UNWILLING_TO_PERFORM; + } +#endif + +done:; + return rs->sr_err; +} + +int +backend_check_restrictions( + Operation *op, + SlapReply *rs, + struct berval *opdata ) +{ + slap_mask_t restrictops; + slap_mask_t requires; + slap_mask_t opflag; + slap_mask_t exopflag = 0; + slap_ssf_set_t ssfs, *ssf; + int updateop = 0; + int starttls = 0; + int session = 0; + + restrictops = frontendDB->be_restrictops; + requires = frontendDB->be_requires; + ssfs = frontendDB->be_ssf_set; + ssf = &ssfs; + + if ( op->o_bd ) { + slap_ssf_t *fssf, *bssf; + int rc = SLAP_CB_CONTINUE, i; + + if ( op->o_bd->be_chk_controls ) { + rc = ( *op->o_bd->be_chk_controls )( op, rs ); + } + + if ( rc == SLAP_CB_CONTINUE ) { + rc = backend_check_controls( op, rs ); + } + + if ( rc != LDAP_SUCCESS ) { + return rs->sr_err; + } + + restrictops |= op->o_bd->be_restrictops; + requires |= op->o_bd->be_requires; + bssf = &op->o_bd->be_ssf_set.sss_ssf; + fssf = &ssfs.sss_ssf; + for ( i=0; i < (int)(sizeof(ssfs)/sizeof(slap_ssf_t)); i++ ) { + if ( bssf[i] ) fssf[i] = bssf[i]; + } + } + + switch( op->o_tag ) { + case LDAP_REQ_ADD: + opflag = SLAP_RESTRICT_OP_ADD; + updateop++; + break; + case LDAP_REQ_BIND: + opflag = SLAP_RESTRICT_OP_BIND; + session++; + break; + case LDAP_REQ_COMPARE: + opflag = SLAP_RESTRICT_OP_COMPARE; + break; + case LDAP_REQ_DELETE: + updateop++; + opflag = SLAP_RESTRICT_OP_DELETE; + break; + case LDAP_REQ_EXTENDED: + opflag = SLAP_RESTRICT_OP_EXTENDED; + + if( !opdata ) { + /* treat unspecified as a modify */ + opflag = SLAP_RESTRICT_OP_MODIFY; + updateop++; + break; + } + + if( bvmatch( opdata, &slap_EXOP_START_TLS ) ) { + session++; + starttls++; + exopflag = SLAP_RESTRICT_EXOP_START_TLS; + break; + } + + if( bvmatch( opdata, &slap_EXOP_WHOAMI ) ) { + exopflag = SLAP_RESTRICT_EXOP_WHOAMI; + break; + } + + if ( bvmatch( opdata, &slap_EXOP_CANCEL ) ) { + exopflag = SLAP_RESTRICT_EXOP_CANCEL; + break; + } + + if ( bvmatch( opdata, &slap_EXOP_MODIFY_PASSWD ) ) { + exopflag = SLAP_RESTRICT_EXOP_MODIFY_PASSWD; + updateop++; + break; + } + + /* treat everything else as a modify */ + opflag = SLAP_RESTRICT_OP_MODIFY; + updateop++; + break; + + case LDAP_REQ_MODIFY: + updateop++; + opflag = SLAP_RESTRICT_OP_MODIFY; + break; + case LDAP_REQ_RENAME: + updateop++; + opflag = SLAP_RESTRICT_OP_RENAME; + break; + case LDAP_REQ_SEARCH: + opflag = SLAP_RESTRICT_OP_SEARCH; + break; + case LDAP_REQ_UNBIND: + session++; + opflag = 0; + break; + default: + rs->sr_text = "restrict operations internal error"; + rs->sr_err = LDAP_OTHER; + return rs->sr_err; + } + + if ( !starttls ) { + /* these checks don't apply to StartTLS */ + + rs->sr_err = LDAP_CONFIDENTIALITY_REQUIRED; + if( op->o_transport_ssf < ssf->sss_transport ) { + rs->sr_text = op->o_transport_ssf + ? "stronger transport confidentiality required" + : "transport confidentiality required"; + return rs->sr_err; + } + + if( op->o_tls_ssf < ssf->sss_tls ) { + rs->sr_text = op->o_tls_ssf + ? "stronger TLS confidentiality required" + : "TLS confidentiality required"; + return rs->sr_err; + } + + + if( op->o_tag == LDAP_REQ_BIND && opdata == NULL ) { + /* simple bind specific check */ + if( op->o_ssf < ssf->sss_simple_bind ) { + rs->sr_text = op->o_ssf + ? "stronger confidentiality required" + : "confidentiality required"; + return rs->sr_err; + } + } + + if( op->o_tag != LDAP_REQ_BIND || opdata == NULL ) { + /* these checks don't apply to SASL bind */ + + if( op->o_sasl_ssf < ssf->sss_sasl ) { + rs->sr_text = op->o_sasl_ssf + ? "stronger SASL confidentiality required" + : "SASL confidentiality required"; + return rs->sr_err; + } + + if( op->o_ssf < ssf->sss_ssf ) { + rs->sr_text = op->o_ssf + ? "stronger confidentiality required" + : "confidentiality required"; + return rs->sr_err; + } + } + + if( updateop ) { + if( op->o_transport_ssf < ssf->sss_update_transport ) { + rs->sr_text = op->o_transport_ssf + ? "stronger transport confidentiality required for update" + : "transport confidentiality required for update"; + return rs->sr_err; + } + + if( op->o_tls_ssf < ssf->sss_update_tls ) { + rs->sr_text = op->o_tls_ssf + ? "stronger TLS confidentiality required for update" + : "TLS confidentiality required for update"; + return rs->sr_err; + } + + if( op->o_sasl_ssf < ssf->sss_update_sasl ) { + rs->sr_text = op->o_sasl_ssf + ? "stronger SASL confidentiality required for update" + : "SASL confidentiality required for update"; + return rs->sr_err; + } + + if( op->o_ssf < ssf->sss_update_ssf ) { + rs->sr_text = op->o_ssf + ? "stronger confidentiality required for update" + : "confidentiality required for update"; + return rs->sr_err; + } + + if( !( global_allows & SLAP_ALLOW_UPDATE_ANON ) && + BER_BVISEMPTY( &op->o_ndn ) ) + { + rs->sr_text = "modifications require authentication"; + rs->sr_err = LDAP_STRONG_AUTH_REQUIRED; + return rs->sr_err; + } + +#ifdef SLAP_X_LISTENER_MOD + if ( op->o_conn->c_listener && + ! ( op->o_conn->c_listener->sl_perms & ( !BER_BVISEMPTY( &op->o_ndn ) + ? (S_IWUSR|S_IWOTH) : S_IWOTH ) ) ) + { + /* no "w" mode means readonly */ + rs->sr_text = "modifications not allowed on this listener"; + rs->sr_err = LDAP_UNWILLING_TO_PERFORM; + return rs->sr_err; + } +#endif /* SLAP_X_LISTENER_MOD */ + } + } + + if ( !session ) { + /* these checks don't apply to Bind, StartTLS, or Unbind */ + + if( requires & SLAP_REQUIRE_STRONG ) { + /* should check mechanism */ + if( ( op->o_transport_ssf < ssf->sss_transport + && op->o_authtype == LDAP_AUTH_SIMPLE ) + || BER_BVISEMPTY( &op->o_dn ) ) + { + rs->sr_text = "strong(er) authentication required"; + rs->sr_err = LDAP_STRONG_AUTH_REQUIRED; + return rs->sr_err; + } + } + + if( requires & SLAP_REQUIRE_SASL ) { + if( op->o_authtype != LDAP_AUTH_SASL || BER_BVISEMPTY( &op->o_dn ) ) { + rs->sr_text = "SASL authentication required"; + rs->sr_err = LDAP_STRONG_AUTH_REQUIRED; + return rs->sr_err; + } + } + + if( requires & SLAP_REQUIRE_AUTHC ) { + if( BER_BVISEMPTY( &op->o_dn ) ) { + rs->sr_text = "authentication required"; + rs->sr_err = LDAP_UNWILLING_TO_PERFORM; + return rs->sr_err; + } + } + + if( requires & SLAP_REQUIRE_BIND ) { + int version; + ldap_pvt_thread_mutex_lock( &op->o_conn->c_mutex ); + version = op->o_conn->c_protocol; + ldap_pvt_thread_mutex_unlock( &op->o_conn->c_mutex ); + + if( !version ) { + /* no bind has occurred */ + rs->sr_text = "BIND required"; + rs->sr_err = LDAP_OPERATIONS_ERROR; + return rs->sr_err; + } + } + + if( requires & SLAP_REQUIRE_LDAP_V3 ) { + if( op->o_protocol < LDAP_VERSION3 ) { + /* no bind has occurred */ + rs->sr_text = "operation restricted to LDAPv3 clients"; + rs->sr_err = LDAP_OPERATIONS_ERROR; + return rs->sr_err; + } + } + +#ifdef SLAP_X_LISTENER_MOD + if ( !starttls && BER_BVISEMPTY( &op->o_dn ) ) { + if ( op->o_conn->c_listener && + !( op->o_conn->c_listener->sl_perms & S_IXOTH )) + { + /* no "x" mode means bind required */ + rs->sr_text = "bind required on this listener"; + rs->sr_err = LDAP_STRONG_AUTH_REQUIRED; + return rs->sr_err; + } + } + + if ( !starttls && !updateop ) { + if ( op->o_conn->c_listener && + !( op->o_conn->c_listener->sl_perms & + ( !BER_BVISEMPTY( &op->o_dn ) + ? (S_IRUSR|S_IROTH) : S_IROTH ))) + { + /* no "r" mode means no read */ + rs->sr_text = "read not allowed on this listener"; + rs->sr_err = LDAP_UNWILLING_TO_PERFORM; + return rs->sr_err; + } + } +#endif /* SLAP_X_LISTENER_MOD */ + + } + + if( ( restrictops & opflag ) + || ( exopflag && ( restrictops & exopflag ) ) + || (( restrictops & SLAP_RESTRICT_READONLY ) && updateop )) { + if( ( restrictops & SLAP_RESTRICT_OP_MASK) == SLAP_RESTRICT_OP_READS ) { + rs->sr_text = "read operations restricted"; + } else if ( restrictops & exopflag ) { + rs->sr_text = "extended operation restricted"; + } else { + rs->sr_text = "operation restricted"; + } + rs->sr_err = LDAP_UNWILLING_TO_PERFORM; + return rs->sr_err; + } + + rs->sr_err = LDAP_SUCCESS; + return rs->sr_err; +} + +int backend_check_referrals( Operation *op, SlapReply *rs ) +{ + rs->sr_err = LDAP_SUCCESS; + + if( op->o_bd->be_chk_referrals ) { + rs->sr_err = op->o_bd->be_chk_referrals( op, rs ); + + if( rs->sr_err != LDAP_SUCCESS && rs->sr_err != LDAP_REFERRAL ) { + send_ldap_result( op, rs ); + } + } + + return rs->sr_err; +} + +int +be_entry_get_rw( + Operation *op, + struct berval *ndn, + ObjectClass *oc, + AttributeDescription *at, + int rw, + Entry **e ) +{ + *e = NULL; + + if ( op->o_bd == NULL ) { + return LDAP_NO_SUCH_OBJECT; + } + + if ( op->o_bd->be_fetch ) { + return op->o_bd->be_fetch( op, ndn, oc, at, rw, e ); + } + + return LDAP_UNWILLING_TO_PERFORM; +} + +int +fe_acl_group( + Operation *op, + Entry *target, + struct berval *gr_ndn, + struct berval *op_ndn, + ObjectClass *group_oc, + AttributeDescription *group_at ) +{ + Entry *e; + void *o_priv = op->o_private, *e_priv = NULL; + Attribute *a; + int rc; + GroupAssertion *g; + Backend *be = op->o_bd; + OpExtra *oex; + + LDAP_SLIST_FOREACH(oex, &op->o_extra, oe_next) { + if ( oex->oe_key == (void *)backend_group ) + break; + } + + if ( oex && ((OpExtraDB *)oex)->oe_db ) + op->o_bd = ((OpExtraDB *)oex)->oe_db; + + if ( !op->o_bd || !SLAP_DBHIDDEN( op->o_bd )) + op->o_bd = select_backend( gr_ndn, 0 ); + + for ( g = op->o_groups; g; g = g->ga_next ) { + if ( g->ga_be != op->o_bd || g->ga_oc != group_oc || + g->ga_at != group_at || g->ga_len != gr_ndn->bv_len ) + { + continue; + } + if ( strcmp( g->ga_ndn, gr_ndn->bv_val ) == 0 ) { + break; + } + } + + if ( g ) { + rc = g->ga_res; + goto done; + } + + if ( target && dn_match( &target->e_nname, gr_ndn ) ) { + e = target; + rc = 0; + + } else { + op->o_private = NULL; + rc = be_entry_get_rw( op, gr_ndn, group_oc, group_at, 0, &e ); + e_priv = op->o_private; + op->o_private = o_priv; + } + + if ( e ) { + a = attr_find( e->e_attrs, group_at ); + if ( a ) { + /* If the attribute is a subtype of labeledURI, + * treat this as a dynamic group ala groupOfURLs + */ + if ( is_at_subtype( group_at->ad_type, + slap_schema.si_ad_labeledURI->ad_type ) ) + { + int i; + LDAPURLDesc *ludp; + struct berval bv, nbase; + Filter *filter; + Entry *user = NULL; + void *user_priv = NULL; + Backend *b2 = op->o_bd; + + if ( target && dn_match( &target->e_nname, op_ndn ) ) { + user = target; + } + + rc = LDAP_COMPARE_FALSE; + for ( i = 0; !BER_BVISNULL( &a->a_vals[i] ); i++ ) { + if ( ldap_url_parse( a->a_vals[i].bv_val, &ludp ) != + LDAP_URL_SUCCESS ) + { + continue; + } + + BER_BVZERO( &nbase ); + + /* host, attrs and extensions parts must be empty */ + if ( ( ludp->lud_host && *ludp->lud_host ) + || ludp->lud_attrs + || ludp->lud_exts ) + { + goto loopit; + } + + ber_str2bv( ludp->lud_dn, 0, 0, &bv ); + if ( dnNormalize( 0, NULL, NULL, &bv, &nbase, + op->o_tmpmemctx ) != LDAP_SUCCESS ) + { + goto loopit; + } + + switch ( ludp->lud_scope ) { + case LDAP_SCOPE_BASE: + if ( !dn_match( &nbase, op_ndn ) ) { + goto loopit; + } + break; + case LDAP_SCOPE_ONELEVEL: + dnParent( op_ndn, &bv ); + if ( !dn_match( &nbase, &bv ) ) { + goto loopit; + } + break; + case LDAP_SCOPE_SUBTREE: + if ( !dnIsSuffix( op_ndn, &nbase ) ) { + goto loopit; + } + break; + case LDAP_SCOPE_SUBORDINATE: + if ( dn_match( &nbase, op_ndn ) || + !dnIsSuffix( op_ndn, &nbase ) ) + { + goto loopit; + } + } + + /* NOTE: this could be NULL + * if no filter is provided, + * or if filter parsing fails. + * In the latter case, + * we should give up. */ + if ( ludp->lud_filter != NULL && *ludp->lud_filter != '\0') { + filter = str2filter_x( op, ludp->lud_filter ); + if ( filter == NULL ) { + /* give up... */ + rc = LDAP_OTHER; + goto loopit; + } + + /* only get user if required + * and not available yet */ + if ( user == NULL ) { + int rc2; + + op->o_bd = select_backend( op_ndn, 0 ); + op->o_private = NULL; + rc2 = be_entry_get_rw( op, op_ndn, NULL, NULL, 0, &user ); + user_priv = op->o_private; + op->o_private = o_priv; + if ( rc2 != 0 ) { + /* give up... */ + rc = (rc2 == LDAP_NO_SUCH_OBJECT) ? rc2 : LDAP_OTHER; + goto loopit; + } + } + + if ( test_filter( NULL, user, filter ) == + LDAP_COMPARE_TRUE ) + { + rc = 0; + } + filter_free_x( op, filter, 1 ); + } +loopit: + ldap_free_urldesc( ludp ); + if ( !BER_BVISNULL( &nbase ) ) { + op->o_tmpfree( nbase.bv_val, op->o_tmpmemctx ); + } + if ( rc != LDAP_COMPARE_FALSE ) { + break; + } + } + + if ( user != NULL && user != target ) { + op->o_private = user_priv; + be_entry_release_r( op, user ); + op->o_private = o_priv; + } + op->o_bd = b2; + + } else { + rc = attr_valfind( a, + SLAP_MR_ATTRIBUTE_VALUE_NORMALIZED_MATCH | + SLAP_MR_ASSERTED_VALUE_NORMALIZED_MATCH, + op_ndn, NULL, op->o_tmpmemctx ); + if ( rc == LDAP_NO_SUCH_ATTRIBUTE ) { + rc = LDAP_COMPARE_FALSE; + } + } + + } else { + rc = LDAP_NO_SUCH_ATTRIBUTE; + } + + if ( e != target ) { + op->o_private = e_priv; + be_entry_release_r( op, e ); + op->o_private = o_priv; + } + + } else { + rc = LDAP_NO_SUCH_OBJECT; + } + + if ( op->o_tag != LDAP_REQ_BIND && !op->o_do_not_cache ) { + g = op->o_tmpalloc( sizeof( GroupAssertion ) + gr_ndn->bv_len, + op->o_tmpmemctx ); + g->ga_be = op->o_bd; + g->ga_oc = group_oc; + g->ga_at = group_at; + g->ga_res = rc; + g->ga_len = gr_ndn->bv_len; + strcpy( g->ga_ndn, gr_ndn->bv_val ); + g->ga_next = op->o_groups; + op->o_groups = g; + } + +done: + op->o_bd = be; + return rc; +} + +int +backend_group( + Operation *op, + Entry *target, + struct berval *gr_ndn, + struct berval *op_ndn, + ObjectClass *group_oc, + AttributeDescription *group_at ) +{ + int rc; + BackendDB *be_orig; + OpExtraDB oex; + + if ( op->o_abandon ) { + return SLAPD_ABANDON; + } + + oex.oe_db = op->o_bd; + oex.oe.oe_key = (void *)backend_group; + LDAP_SLIST_INSERT_HEAD(&op->o_extra, &oex.oe, oe_next); + + be_orig = op->o_bd; + op->o_bd = frontendDB; + rc = frontendDB->be_group( op, target, gr_ndn, + op_ndn, group_oc, group_at ); + op->o_bd = be_orig; + LDAP_SLIST_REMOVE(&op->o_extra, &oex.oe, OpExtra, oe_next); + + return rc; +} + +int +fe_acl_attribute( + Operation *op, + Entry *target, + struct berval *edn, + AttributeDescription *entry_at, + BerVarray *vals, + slap_access_t access ) +{ + Entry *e = NULL; + void *o_priv = op->o_private, *e_priv = NULL; + Attribute *a = NULL; + int freeattr = 0, i, j, rc = LDAP_SUCCESS; + AccessControlState acl_state = ACL_STATE_INIT; + Backend *be = op->o_bd; + OpExtra *oex; + + LDAP_SLIST_FOREACH(oex, &op->o_extra, oe_next) { + if ( oex->oe_key == (void *)backend_attribute ) + break; + } + + if ( oex && ((OpExtraDB *)oex)->oe_db ) + op->o_bd = ((OpExtraDB *)oex)->oe_db; + + if ( !op->o_bd || !SLAP_DBHIDDEN( op->o_bd )) + op->o_bd = select_backend( edn, 0 ); + + if ( target && dn_match( &target->e_nname, edn ) ) { + e = target; + + } else { + op->o_private = NULL; + rc = be_entry_get_rw( op, edn, NULL, entry_at, 0, &e ); + e_priv = op->o_private; + op->o_private = o_priv; + } + + if ( e ) { + if ( entry_at == slap_schema.si_ad_entry || entry_at == slap_schema.si_ad_children ) { + assert( vals == NULL ); + + rc = LDAP_SUCCESS; + if ( op->o_conn && access > ACL_NONE && + access_allowed( op, e, entry_at, NULL, + access, &acl_state ) == 0 ) + { + rc = LDAP_INSUFFICIENT_ACCESS; + } + goto freeit; + } + + a = attr_find( e->e_attrs, entry_at ); + if ( a == NULL ) { + SlapReply rs = { REP_SEARCH }; + AttributeName anlist[ 2 ]; + + anlist[ 0 ].an_name = entry_at->ad_cname; + anlist[ 0 ].an_desc = entry_at; + BER_BVZERO( &anlist[ 1 ].an_name ); + rs.sr_attrs = anlist; + + /* NOTE: backend_operational() is also called + * when returning results, so it's supposed + * to do no harm to entries */ + rs.sr_entry = e; + rc = backend_operational( op, &rs ); + + if ( rc == LDAP_SUCCESS ) { + if ( rs.sr_operational_attrs ) { + freeattr = 1; + a = rs.sr_operational_attrs; + + } else { + rc = LDAP_NO_SUCH_ATTRIBUTE; + } + } + } + + if ( a ) { + BerVarray v; + + if ( op->o_conn && access > ACL_NONE && + access_allowed( op, e, entry_at, NULL, + access, &acl_state ) == 0 ) + { + rc = LDAP_INSUFFICIENT_ACCESS; + goto freeit; + } + + i = a->a_numvals; + v = op->o_tmpalloc( sizeof(struct berval) * ( i + 1 ), + op->o_tmpmemctx ); + for ( i = 0, j = 0; !BER_BVISNULL( &a->a_vals[i] ); i++ ) + { + if ( op->o_conn && access > ACL_NONE && + access_allowed( op, e, entry_at, + &a->a_nvals[i], + access, + &acl_state ) == 0 ) + { + continue; + } + ber_dupbv_x( &v[j], &a->a_nvals[i], + op->o_tmpmemctx ); + if ( !BER_BVISNULL( &v[j] ) ) { + j++; + } + } + if ( j == 0 ) { + op->o_tmpfree( v, op->o_tmpmemctx ); + *vals = NULL; + rc = LDAP_INSUFFICIENT_ACCESS; + + } else { + BER_BVZERO( &v[j] ); + *vals = v; + rc = LDAP_SUCCESS; + } + } +freeit: if ( e != target ) { + op->o_private = e_priv; + be_entry_release_r( op, e ); + op->o_private = o_priv; + } + if ( freeattr ) { + attr_free( a ); + } + } + + op->o_bd = be; + return rc; +} + +int +backend_attribute( + Operation *op, + Entry *target, + struct berval *edn, + AttributeDescription *entry_at, + BerVarray *vals, + slap_access_t access ) +{ + int rc; + BackendDB *be_orig; + OpExtraDB oex; + + oex.oe_db = op->o_bd; + oex.oe.oe_key = (void *)backend_attribute; + LDAP_SLIST_INSERT_HEAD(&op->o_extra, &oex.oe, oe_next); + + be_orig = op->o_bd; + op->o_bd = frontendDB; + rc = frontendDB->be_attribute( op, target, edn, + entry_at, vals, access ); + op->o_bd = be_orig; + LDAP_SLIST_REMOVE(&op->o_extra, &oex.oe, OpExtra, oe_next); + + return rc; +} + +int +backend_access( + Operation *op, + Entry *target, + struct berval *edn, + AttributeDescription *entry_at, + struct berval *nval, + slap_access_t access, + slap_mask_t *mask ) +{ + Entry *e = NULL; + void *o_priv, *e_priv = NULL; + int rc = LDAP_INSUFFICIENT_ACCESS; + Backend *be; + + /* pedantic */ + assert( op != NULL ); + assert( op->o_conn != NULL ); + assert( edn != NULL ); + assert( access > ACL_NONE ); + + be = op->o_bd; + o_priv = op->o_private; + + if ( !op->o_bd ) { + op->o_bd = select_backend( edn, 0 ); + } + + if ( target && dn_match( &target->e_nname, edn ) ) { + e = target; + + } else { + op->o_private = NULL; + rc = be_entry_get_rw( op, edn, NULL, entry_at, 0, &e ); + e_priv = op->o_private; + op->o_private = o_priv; + } + + if ( e ) { + Attribute *a = NULL; + int freeattr = 0; + + if ( entry_at == NULL ) { + entry_at = slap_schema.si_ad_entry; + } + + if ( entry_at == slap_schema.si_ad_entry || entry_at == slap_schema.si_ad_children ) + { + if ( access_allowed_mask( op, e, entry_at, + NULL, access, NULL, mask ) == 0 ) + { + rc = LDAP_INSUFFICIENT_ACCESS; + + } else { + rc = LDAP_SUCCESS; + } + + } else { + a = attr_find( e->e_attrs, entry_at ); + if ( a == NULL ) { + SlapReply rs = { REP_SEARCH }; + AttributeName anlist[ 2 ]; + + anlist[ 0 ].an_name = entry_at->ad_cname; + anlist[ 0 ].an_desc = entry_at; + BER_BVZERO( &anlist[ 1 ].an_name ); + rs.sr_attrs = anlist; + + rs.sr_attr_flags = slap_attr_flags( rs.sr_attrs ); + + /* NOTE: backend_operational() is also called + * when returning results, so it's supposed + * to do no harm to entries */ + rs.sr_entry = e; + rc = backend_operational( op, &rs ); + + if ( rc == LDAP_SUCCESS ) { + if ( rs.sr_operational_attrs ) { + freeattr = 1; + a = rs.sr_operational_attrs; + + } else { + rc = LDAP_NO_SUCH_OBJECT; + } + } + } + + if ( a ) { + if ( access_allowed_mask( op, e, entry_at, + nval, access, NULL, mask ) == 0 ) + { + rc = LDAP_INSUFFICIENT_ACCESS; + goto freeit; + } + rc = LDAP_SUCCESS; + } + } +freeit: if ( e != target ) { + op->o_private = e_priv; + be_entry_release_r( op, e ); + op->o_private = o_priv; + } + if ( freeattr ) { + attr_free( a ); + } + } + + op->o_bd = be; + return rc; +} + +int +fe_aux_operational( + Operation *op, + SlapReply *rs ) +{ + Attribute **ap; + int rc = LDAP_SUCCESS; + BackendDB *be_orig = op->o_bd; + OpExtra *oex; + + LDAP_SLIST_FOREACH(oex, &op->o_extra, oe_next) { + if ( oex->oe_key == (void *)backend_operational ) + break; + } + + for ( ap = &rs->sr_operational_attrs; *ap; ap = &(*ap)->a_next ) + /* just count them */ ; + + /* + * If operational attributes (allegedly) are required, + * and the backend supports specific operational attributes, + * add them to the attribute list + */ + if ( !( rs->sr_flags & REP_NO_ENTRYDN ) + && ( SLAP_OPATTRS( rs->sr_attr_flags ) || ( rs->sr_attrs && + ad_inlist( slap_schema.si_ad_entryDN, rs->sr_attrs ) ) ) ) + { + *ap = slap_operational_entryDN( rs->sr_entry ); + ap = &(*ap)->a_next; + } + + if ( !( rs->sr_flags & REP_NO_SUBSCHEMA) + && ( SLAP_OPATTRS( rs->sr_attr_flags ) || ( rs->sr_attrs && + ad_inlist( slap_schema.si_ad_subschemaSubentry, rs->sr_attrs ) ) ) ) + { + *ap = slap_operational_subschemaSubentry( op->o_bd ); + ap = &(*ap)->a_next; + } + + /* Let the overlays have a chance at this */ + if ( oex && ((OpExtraDB *)oex)->oe_db ) + op->o_bd = ((OpExtraDB *)oex)->oe_db; + + if ( !op->o_bd || !SLAP_DBHIDDEN( op->o_bd )) + op->o_bd = select_backend( &op->o_req_ndn, 0 ); + + if ( op->o_bd != NULL && !be_match( op->o_bd, frontendDB ) && + ( SLAP_OPATTRS( rs->sr_attr_flags ) || rs->sr_attrs ) && + op->o_bd->be_operational != NULL ) + { + rc = op->o_bd->be_operational( op, rs ); + } + op->o_bd = be_orig; + + return rc; +} + +int backend_operational( Operation *op, SlapReply *rs ) +{ + int rc; + BackendDB *be_orig; + OpExtraDB oex; + + oex.oe_db = op->o_bd; + oex.oe.oe_key = (void *)backend_operational; + LDAP_SLIST_INSERT_HEAD(&op->o_extra, &oex.oe, oe_next); + + /* Moved this into the frontend so global overlays are called */ + + be_orig = op->o_bd; + op->o_bd = frontendDB; + rc = frontendDB->be_operational( op, rs ); + op->o_bd = be_orig; + LDAP_SLIST_REMOVE(&op->o_extra, &oex.oe, OpExtra, oe_next); + + return rc; +} + +/* helper that calls the bi_tool_entry_first_x() variant with default args; + * use to initialize a backend's bi_tool_entry_first() when appropriate + */ +ID +backend_tool_entry_first( BackendDB *be ) +{ + return be->bd_info->bi_tool_entry_first_x( be, + NULL, LDAP_SCOPE_DEFAULT, NULL ); +} |