org.elasticsearch.hadoop.rest.NetworkUtils Maven / Gradle / Ivy
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* Licensed to Elasticsearch under one or more contributor
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* this work for additional information regarding copyright
* ownership. Elasticsearch licenses this file to you 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 org.elasticsearch.hadoop.rest;
import java.net.InetAddress;
import java.net.NetworkInterface;
import java.net.SocketException;
import java.util.ArrayList;
import java.util.Collections;
import java.util.List;
public abstract class NetworkUtils {
private NetworkUtils() {
}
/** Helper for getInterfaces, recursively adds subinterfaces to {@code target} */
private static void addAllInterfaces(List target, List level) {
if (!level.isEmpty()) {
target.addAll(level);
for (NetworkInterface intf : level) {
addAllInterfaces(target, Collections.list(intf.getSubInterfaces()));
}
}
}
/** Return all interfaces (and subinterfaces) on the system */
static List getInterfaces() throws SocketException {
List all = new ArrayList();
addAllInterfaces(all, Collections.list(NetworkInterface.getNetworkInterfaces()));
return all;
}
/** Returns all global scope addresses for interfaces that are up. */
static InetAddress[] getGlobalInterfaces() throws SocketException {
List list = new ArrayList ();
for (NetworkInterface intf : getInterfaces()) {
if (intf.isUp()) {
for (InetAddress address : Collections.list(intf.getInetAddresses())) {
if (address.isLoopbackAddress() == false &&
address.isSiteLocalAddress() == false &&
address.isLinkLocalAddress() == false) {
list.add(address);
}
}
}
}
return list.toArray(new InetAddress[list.size()]);
}
}