public static IP4Address next(IP4Address address) throws UnknownHostException {
byte[] addr = address.toByteArray();
int i = addr.length - 1;
while (i >= 0 && addr[i] == (byte) 0xff) {
addr[i] = 0;
i--;
}
if (i >= 0) {
addr[i]++;
return new IP4Address(addr);
} else return null;
}
@Override
public void run() {
Logger.debug("UdpProber started ...");
mStopped = false;
int i, nhosts = 0;
IP4Address current = null;
try {
mNetwork = System.getNetwork();
nhosts = mNetwork.getNumberOfAddresses();
} catch (Exception e) {
System.errorLogging(e);
}
while (!mStopped && mNetwork != null && nhosts > 0) {
try {
for (i = 1, current = IP4Address.next(mNetwork.getStartAddress());
current != null && i <= nhosts;
current = IP4Address.next(current), i++) {
// rescanning the gateway could cause an issue when the gateway itself has multiple
// interfaces ( LAN, WAN ... )
if (!current.equals(mNetwork.getGatewayAddress())
&& !current.equals(mNetwork.getLocalAddress())) {
InetAddress address = current.toInetAddress();
try {
mExecutor.execute(new SingleProber(address));
} catch (RejectedExecutionException e) {
// ignore since this is happening because the executor was shut down.
break;
} catch (OutOfMemoryError m) {
// wait until the thread queue gets freed
break;
}
}
}
Thread.sleep(1000);
} catch (Exception e) {
}
}
}
public boolean equals(IP4Address address) {
return mInteger == address.toInteger();
}