BTH5_SLIP_PKTSTART
sc->sc_slip_txrsv = BTH5_SLIP_PKTSTART;
if (sc->sc_slip_txrsv == BTH5_SLIP_PKTSTART)
sc->sc_slip_txrsv = BTH5_SLIP_PKTSTART;
if (c != BTH5_SLIP_PKTSTART) {
case BTH5_SLIP_PKTSTART /* or _PKTEND */:
sc->sc_slip_rxexp = BTH5_SLIP_PKTSTART;
case BTH5_SLIP_PKTSTART:
#define BTH5_SLIP_PKTEND BTH5_SLIP_PKTSTART