/* * Copyright 2015-2017 Red Hat, Inc. and/or its affiliates * and other contributors as indicated by the @author tags. * * 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 org.hawkular.apm.tests.dockerized; import java.net.InetAddress; import java.net.NetworkInterface; import java.net.SocketException; import java.util.ArrayList; import java.util.Collections; import java.util.Enumeration; import java.util.HashMap; import java.util.List; import java.util.Map; /** * Class for accessing ip addresses of given interface. * * @author Pavol Loffay */ public class InterfaceIpV4Address { /** * interface name -> ip addresses */ private static Map<String, List<InetAddress>> interfaceIpAddressMap; private InterfaceIpV4Address() { } /** * @param intfc The interface name * @return List of ipv4 addresses of given interface. Only site local addresses are returned. */ public static List<InetAddress> getIpAddresses(String intfc) { if (interfaceIpAddressMap == null) { interfaceIpAddressMap = init(); } return interfaceIpAddressMap.get(intfc); } private static Map<String, List<InetAddress>> init() { Map<String, List<InetAddress>> interfacesIpAddressesMap = new HashMap<>(); Enumeration networkInterfaces = null; try { networkInterfaces = NetworkInterface.getNetworkInterfaces(); } catch (SocketException ex) { throw new RuntimeException("Failed to get network interfaces", ex); } while (networkInterfaces.hasMoreElements()) { NetworkInterface networkInterface = (NetworkInterface) networkInterfaces.nextElement(); networkInterface.getDisplayName(); List<InetAddress> ipAddresses = new ArrayList<>(); Enumeration ee = networkInterface.getInetAddresses(); while (ee.hasMoreElements()) { InetAddress inetAddress = (InetAddress) ee.nextElement(); if (inetAddress.isSiteLocalAddress()) { ipAddresses.add(inetAddress); } } interfacesIpAddressesMap.put(networkInterface.getDisplayName(), Collections.unmodifiableList(ipAddresses)); } return Collections.unmodifiableMap(interfacesIpAddressesMap); } }