public Object makeObject(Object key) throws Exception {
ImmutableEndpoint ep = (ImmutableEndpoint) key;
MulticastSocket socket = (MulticastSocket) super.makeObject(key);
socket.setLoopbackMode(((MulticastConnector) ep.getConnector()).isLoopback());
int ttl = ((MulticastConnector) ep.getConnector()).getTimeToLive();
if (ttl != Connector.INT_VALUE_NOT_SET) {
socket.setTimeToLive(ttl);
}
return socket;
}
@Override
public void setLoopbackModeDisabled(boolean loopbackModeDisabled) {
if (socket instanceof MulticastSocket) {
try {
((MulticastSocket) socket).setLoopbackMode(loopbackModeDisabled);
} catch (SocketException e) {
throw new ChannelException(e);
}
} else {
throw new UnsupportedOperationException();
}
}
public String findServerIpAddress() throws IOException {
String deviceName = null;
MulticastSocket multicastSocket = new MulticastSocket(MULTICAST_PORT);
multicastSocket.setLoopbackMode(true);
InetAddress group = InetAddress.getByName(GROUP_IP);
multicastSocket.joinGroup(group);
multicastSocket.setSoTimeout(5000);
DatagramPacket packet;
while (isRunning) {
List<Device> lists = new ArrayList<Device>();
try {
byte[] receiveData = new byte[64];
packet = new DatagramPacket(receiveData, receiveData.length);
multicastSocket.receive(packet);
String deviceIp = packet.getAddress().toString();
deviceIp = deviceIp.substring(1, deviceIp.length()); // ip地址
StringBuilder packetContent = new StringBuilder();
for (int i = 0; i < receiveData.length; i++) {
if (receiveData[i] == 0) {
break;
}
packetContent.append((char) receiveData[i]); // 拼接设备名称
}
deviceName = packetContent.toString(); // 设备名称
Device device = new Device();
device.setDeviceName(deviceIp);
device.setDeviceIp(deviceName);
lists.add(device);
if (deviceName.equals(deviceIp)) {
// find server ip address:
// deviceName
break;
} else {
// not find server ip address,
// continue …
try {
Thread.sleep(1000);
} catch (InterruptedException e) {
}
}
} catch (SocketTimeoutException e) {
if (isDebug) {}
listMulticasts.clear();
listMulticasts.addAll(lists);
}
try {
Thread.sleep(5000);
} catch (InterruptedException e) {
e.printStackTrace();
}
}
return deviceName;
}