SHDLC_HALF_CONNECTED
shdlc->state = SHDLC_HALF_CONNECTED;
case SHDLC_HALF_CONNECTED:
if (shdlc->state == SHDLC_HALF_CONNECTED)
if (shdlc->state == SHDLC_HALF_CONNECTED)
case SHDLC_HALF_CONNECTED: