Beispiel #1
0
  private void searchBridgesBruteforce(BridgeSearchTask task) {
    HashSet<String> ipsDiscovered = new HashSet<String>();

    // Add any existing results if continuing from an existing search
    for (Bridge b : bridges) {
      ipsDiscovered.add(b.getIp());
    }

    // Build list of IPs to search (search from center to outer range, because devices are usually
    // around 192.168.1.100)
    ArrayList<String> ips = new ArrayList<String>(255);

    ips.add("192.168.1.127");

    for (int i = 1; i <= 127; i++) {
      ips.add("192.168.1." + (127 - i));
      ips.add("192.168.1." + (127 + i));
    }

    //  Check every IP for a listening device
    for (int i = 0; i < 255; i++) {
      try {
        final String ip = ips.get(i);
        if (ipsDiscovered.contains(ip)) continue;

        tryIP(ip, "http://" + ip + "/description.xml", 20);
      } catch (IOException e) {
        // Either no device or not a Philips Hue bridge, move on
      } catch (Exception e) {
        // Other types of exceptions sometimes occur when device is misbehaving (e.g. bad UPnP
        // description file)
      }
    }
  }
Beispiel #2
0
  private void searchBridgesUPnP(BridgeSearchTask task) throws IOException {
    // Search bridges on local network using UPnP
    String upnpRequest =
        "M-SEARCH * HTTP/1.1\nHOST: 239.255.255.250:1900\nMAN: ssdp:discover\nMX: 8\nST:SsdpSearch:all";
    DatagramSocket upnpSock = new DatagramSocket();
    upnpSock.setSoTimeout(100);
    upnpSock.send(
        new DatagramPacket(
            upnpRequest.getBytes(),
            upnpRequest.length(),
            new InetSocketAddress("239.255.255.250", 1900)));

    HashSet<String> ipsDiscovered = new HashSet<String>();

    // Add any existing results from bruteforce search and previous searches
    for (Bridge b : bridges) {
      ipsDiscovered.add(b.getIp());
    }

    long start = System.currentTimeMillis();
    long nextBroadcast = start + BROADCAST_INTERVAL;

    while (true) {
      // Send a new discovery broadcast once a second
      if (System.currentTimeMillis() > nextBroadcast) {
        upnpSock.send(
            new DatagramPacket(
                upnpRequest.getBytes(),
                upnpRequest.length(),
                new InetSocketAddress("239.255.255.250", 1900)));
        nextBroadcast = System.currentTimeMillis() + BROADCAST_INTERVAL;
      }

      byte[] responseBuffer = new byte[1024];

      DatagramPacket responsePacket = new DatagramPacket(responseBuffer, responseBuffer.length);

      try {
        upnpSock.receive(responsePacket);
      } catch (SocketTimeoutException e) {
        if (System.currentTimeMillis() - start > SEARCH_TIMEOUT || task.isCancelled()) {
          break;
        } else {
          continue;
        }
      }

      final String ip = responsePacket.getAddress().getHostAddress();
      final String response = new String(responsePacket.getData());

      if (!ipsDiscovered.contains(ip)) {
        Matcher m = Pattern.compile("LOCATION: (.*)", Pattern.CASE_INSENSITIVE).matcher(response);

        if (m.find()) {
          tryIP(ip, m.group(1), 1000);
        }

        // Ignore subsequent packets
        ipsDiscovered.add(ip);
      }
    }
  }