sm->log_class = vlib_log_register_class ("nat", 0);
error_drop_node = vlib_get_node_by_name (vm, (u8 *) "error-drop");
sm->error_node_index = error_drop_node->index;
sm->log_class = vlib_log_register_class ("nat", 0);
error_drop_node = vlib_get_node_by_name (vm, (u8 *) "error-drop");
sm->error_node_index = error_drop_node->index;