/**
* Copyright (C) 2014-2016 LinkedIn Corp. (pinot-core@linkedin.com)
*
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
* You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*/
package com.linkedin.pinot.common.utils;
import java.net.DatagramSocket;
import java.net.InetAddress;
import java.net.SocketException;
import java.net.UnknownHostException;
public class NetUtil {
private static final String DUMMY_OUT_IP = "74.125.224.0";
/**
* Get the ip address of local host.
*/
public static String getHostAddress() throws SocketException, UnknownHostException {
DatagramSocket ds = new DatagramSocket();
ds.connect(InetAddress.getByName(DUMMY_OUT_IP), 80);
InetAddress localAddress = ds.getLocalAddress();
if (localAddress.getHostAddress().equals("0.0.0.0")) {
localAddress = InetAddress.getLocalHost();
}
return localAddress.getHostAddress();
}
/**
* Get the hostname or IP address.
*
* @return The hostname if available, otherwise a dotted quad address. Returns null if neither can be determined.
*/
public static String getHostnameOrAddress() {
try {
return InetAddress.getLocalHost().getCanonicalHostName();
} catch (UnknownHostException ignored) {
try {
return getHostAddress();
} catch (Exception e) {
return null;
}
}
}
}