+enum op_which {
+ op_bind = 0,
+ op_unbind,
+ op_search,
+ op_compare,
+ op_modify,
+ op_modrdn,
+ op_add,
+ op_delete,
+ op_abandon,
+ op_cancel,
+ op_extended,
+ op_aux_operational,
+ op_aux_chk_referrals,
+ op_aux_chk_controls,
+ op_last
+};
+
+/*
+ * default return code in case of missing backend function
+ * and overlay stack returning SLAP_CB_CONTINUE
+ */
+static int op_rc[] = {
+ LDAP_UNWILLING_TO_PERFORM, /* bind */
+ LDAP_UNWILLING_TO_PERFORM, /* unbind */
+ LDAP_UNWILLING_TO_PERFORM, /* search */
+ SLAP_CB_CONTINUE, /* compare; pass to frontend */
+ LDAP_UNWILLING_TO_PERFORM, /* modify */
+ LDAP_UNWILLING_TO_PERFORM, /* modrdn */
+ LDAP_UNWILLING_TO_PERFORM, /* add */
+ LDAP_UNWILLING_TO_PERFORM, /* delete */
+ LDAP_UNWILLING_TO_PERFORM, /* abandon */
+ LDAP_UNWILLING_TO_PERFORM, /* cancel */
+ LDAP_UNWILLING_TO_PERFORM, /* extended */
+ LDAP_SUCCESS, /* aux_operational */
+ LDAP_SUCCESS, /* aux_chk_referrals */
+ SLAP_CB_CONTINUE /* aux_chk_controls; pass to frontend */
+};
+
+#ifdef SLAP_OVERLAY_ACCESS
+static int
+over_access_allowed(
+ Operation *op,
+ Entry *e,
+ AttributeDescription *desc,
+ struct berval *val,
+ slap_access_t access,
+ AccessControlState *state,
+ slap_mask_t *maskp )
+{
+ slap_overinfo *oi;
+ slap_overinst *on;
+ BackendInfo *bi = op->o_bd->bd_info;
+ BackendDB *be = op->o_bd, db;
+ int rc = SLAP_CB_CONTINUE;
+
+ /* FIXME: used to happen for instance during abandon
+ * when global overlays are used... */
+ assert( op->o_bd != NULL );
+
+ oi = op->o_bd->bd_info->bi_private;
+ on = oi->oi_list;
+
+ for ( ; on; on = on->on_next ) {
+ if ( on->on_bi.bi_access_allowed ) {
+ /* NOTE: do not copy the structure until required */
+ if ( !SLAP_ISOVERLAY( op->o_bd ) ) {
+ db = *op->o_bd;
+ db.be_flags |= SLAP_DBFLAG_OVERLAY;
+ op->o_bd = &db;
+ }
+
+ op->o_bd->bd_info = (BackendInfo *)on;
+ rc = on->on_bi.bi_access_allowed( op, e,
+ desc, val, access, state, maskp );
+ if ( rc != SLAP_CB_CONTINUE ) break;
+ }
+ }
+
+ if ( rc == SLAP_CB_CONTINUE ) {
+ BI_access_allowed *bi_access_allowed;
+
+ /* if the database structure was changed, o_bd points to a
+ * copy of the structure; put the original bd_info in place */
+ if ( SLAP_ISOVERLAY( op->o_bd ) ) {
+ op->o_bd->bd_info = oi->oi_orig;
+ }
+
+ if ( oi->oi_orig->bi_access_allowed ) {
+ bi_access_allowed = oi->oi_orig->bi_access_allowed;
+ } else {
+ bi_access_allowed = slap_access_allowed;
+ }
+
+ rc = bi_access_allowed( op, e,
+ desc, val, access, state, maskp );
+ }
+ /* should not fall thru this far without anything happening... */
+ if ( rc == SLAP_CB_CONTINUE ) {
+ /* access not allowed */
+ rc = 0;
+ }
+
+ op->o_bd = be;
+ op->o_bd->bd_info = bi;
+
+ return rc;
+}
+#endif /* SLAP_OVERLAY_ACCESS */