private synchronized void setState(byte newState) {
if (state == DESTROYED) return;
state = newState;
if (state == CONNECTING) {
seqSend = 0;
seqRcv = 0;
} else if (state == OPEN_IDLE) restartTimer();
else if (state == OPEN_WAIT) restartTimer();
else if (state == DISCONNECTED) {
if (timer != null) timer.dormant();
} else if (state == DESTROYED) if (timer != null) timer.quit();
}
private void restartTimer() {
if (!co) throw new KNXIllegalStateException("no timer if not connection oriented");
if (state == DESTROYED) return;
if (timer != null) timer.restart();
else timer = new ConnectionTimeout();
}