コード例 #1
0
ファイル: UDPPinger.java プロジェクト: hidebay/ipscan
  public PingResult ping(ScanningSubject subject, int count) throws IOException {
    PingResult result = new PingResult(subject.getAddress());

    DatagramSocket socket = sockets.bind(new DatagramSocket());
    socket.setSoTimeout(timeout);
    socket.connect(subject.getAddress(), PROBE_UDP_PORT);

    for (int i = 0; i < count && !Thread.currentThread().isInterrupted(); i++) {
      long startTime = System.currentTimeMillis();
      byte[] payload = new byte[8];
      ByteBuffer.wrap(payload).putLong(startTime);
      DatagramPacket packet = new DatagramPacket(payload, payload.length);
      try {
        socket.send(packet);
        socket.receive(packet);
      } catch (PortUnreachableException e) {
        result.addReply(System.currentTimeMillis() - startTime);
      } catch (SocketTimeoutException ignore) {
      } catch (NoRouteToHostException e) {
        // this means that the host is down
        break;
      } catch (SocketException e) {
        if (e.getMessage().contains(/*No*/ "route to host")) {
          // sometimes 'No route to host' also gets here...
          break;
        }
      } catch (IOException e) {
        LOG.log(FINER, subject.toString(), e);
      }
    }
    return result;
  }
コード例 #2
0
ファイル: UDPPinger.java プロジェクト: hidebay/ipscan
 public void close() {
   sockets.close();
 }