TRC_PORT_NONE
tp.port = TRC_PORT_NONE;
if (!strncmp(word, "loopback", 8) && tp.port == TRC_PORT_NONE) {
if (!strncmp(word, "tx", 2) && tp.port == TRC_PORT_NONE) {
if (!strncmp(word, "rx", 2) && tp.port == TRC_PORT_NONE) {
if (tp.port == TRC_PORT_NONE)