new Thread() {
public void run() {
Util.sleep(500);
for(int i=0; i < 2; i++)
rsps.addResponse(new PingData(addrs[i],true,names[i],phys_addrs[i]), false);
rsps.addResponse(new PingData(addrs[3], true, names[3], phys_addrs[3]).coord(true), false);
}
}.start();
done=rsps.waitFor(20000);
long time=System.currentTimeMillis() - start;