/*******************************************************************************
* Copyright (c) 2012-2017 Codenvy, S.A.
* All rights reserved. This program and the accompanying materials
* are made available under the terms of the Eclipse Public License v1.0
* which accompanies this distribution, and is available at
* http://www.eclipse.org/legal/epl-v10.html
*
* Contributors:
* Codenvy, S.A. - initial API and implementation
*******************************************************************************/
package org.eclipse.che.plugin.docker.client.helper;
import org.slf4j.Logger;
import org.slf4j.LoggerFactory;
import javax.inject.Singleton;
import java.net.Inet4Address;
import java.net.InetAddress;
import java.net.NetworkInterface;
import java.net.SocketException;
import java.util.Enumeration;
import java.util.Optional;
/**
* Default Implementation of the {@link NetworkFinder}
*
* @author Florent Benoit
*/
@Singleton
public class DefaultNetworkFinder implements NetworkFinder {
/**
* Logger.
*/
private static final Logger LOG = LoggerFactory.getLogger(DefaultNetworkFinder.class);
/**
* Gets the first Inet address of a given network interface if it's found
*
* @param bridgeName
* name of the network interface
* @return only ipv4 ip of the given bridge
*/
@Override
public Optional<InetAddress> getIPAddress(String bridgeName) {
NetworkInterface docker0 = null;
try {
docker0 = NetworkInterface.getByName(bridgeName);
} catch (SocketException e) {
LOG.error("Unable to list the network interfaces", e);
}
if (docker0 != null) {
// first ipv4 ip
Enumeration<InetAddress> addresses = docker0.getInetAddresses();
while (addresses.hasMoreElements()) {
InetAddress inetAddress = addresses.nextElement();
if (inetAddress instanceof Inet4Address) {
return Optional.of(inetAddress);
}
}
}
return Optional.empty();
}
/**
* Search if a given network interface is matching the given subnet
* If there is a match, returns the InetAddress
*
* @param subnet
* the first digits of an ip address. Like 123.123.123
* @return optional ipv4 internet address if there was a matching one
*/
@Override
public Optional<InetAddress> getMatchingInetAddress(String subnet) {
Enumeration<NetworkInterface> interfacesEnum = null;
try {
interfacesEnum = NetworkInterface.getNetworkInterfaces();
} catch (SocketException e) {
LOG.error("Unable to list the network interfaces", e);
return Optional.empty();
}
while (interfacesEnum.hasMoreElements()) {
NetworkInterface networkInterface = interfacesEnum.nextElement();
Enumeration<InetAddress> inetAddressEnumeration = networkInterface.getInetAddresses();
while (inetAddressEnumeration.hasMoreElements()) {
InetAddress inetAddress = inetAddressEnumeration.nextElement();
if (inetAddress instanceof Inet4Address) {
if (inetAddress.getHostAddress().startsWith(subnet)) {
return Optional.of(inetAddress);
}
}
}
}
return Optional.empty();
}
}