interface_output_trace_t *t = va_arg (*va, interface_output_trace_t *);
vnet_main_t *vnm = vnet_get_main ();
vnet_sw_interface_t *si;
interface_output_trace_t *t = va_arg (*va, interface_output_trace_t *);
vnet_main_t *vnm = vnet_get_main ();
vnet_sw_interface_t *si;