| /** |
| * Licensed to the Apache Software Foundation (ASF) under one |
| * or more contributor license agreements. See the NOTICE file |
| * distributed with this work for additional information |
| * regarding copyright ownership. The ASF 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.apache.hadoop.util; |
| |
| import java.net.InetAddress; |
| import java.net.UnknownHostException; |
| import java.util.ArrayList; |
| import java.util.Collection; |
| import java.util.Collections; |
| import java.util.HashSet; |
| import java.util.LinkedList; |
| import java.util.List; |
| import java.util.Set; |
| |
| import org.apache.commons.net.util.SubnetUtils; |
| |
| import org.apache.hadoop.thirdparty.com.google.common.annotations.VisibleForTesting; |
| import org.slf4j.Logger; |
| import org.slf4j.LoggerFactory; |
| |
| /** |
| * Container class which holds a list of ip/host addresses and |
| * answers membership queries. |
| * |
| * Accepts list of ip addresses, ip addreses in CIDR format and/or |
| * host addresses. |
| */ |
| |
| public class MachineList { |
| |
| public static final Logger LOG = LoggerFactory.getLogger(MachineList.class); |
| public static final String WILDCARD_VALUE = "*"; |
| |
| /** |
| * InetAddressFactory is used to obtain InetAddress from host. |
| * This class makes it easy to simulate host to ip mappings during testing. |
| * |
| */ |
| public static class InetAddressFactory { |
| |
| static final InetAddressFactory S_INSTANCE = new InetAddressFactory(); |
| |
| public InetAddress getByName (String host) throws UnknownHostException { |
| return InetAddress.getByName(host); |
| } |
| } |
| |
| private final boolean all; |
| private final Set<InetAddress> inetAddresses; |
| private final Collection<String> entries; |
| private final List<SubnetUtils.SubnetInfo> cidrAddresses; |
| private final InetAddressFactory addressFactory; |
| |
| /** |
| * |
| * @param hostEntries comma separated ip/cidr/host addresses |
| */ |
| public MachineList(String hostEntries) { |
| this(hostEntries, InetAddressFactory.S_INSTANCE); |
| } |
| |
| public MachineList(String hostEntries, InetAddressFactory addressFactory) { |
| this(StringUtils.getTrimmedStringCollection(hostEntries), addressFactory); |
| } |
| |
| /** |
| * |
| * @param hostEntries collection of separated ip/cidr/host addresses |
| */ |
| public MachineList(Collection<String> hostEntries) { |
| this(hostEntries, InetAddressFactory.S_INSTANCE); |
| } |
| |
| /** |
| * Accepts a collection of ip/cidr/host addresses |
| * |
| * @param hostEntries |
| * @param addressFactory addressFactory to convert host to InetAddress |
| */ |
| public MachineList(Collection<String> hostEntries, |
| InetAddressFactory addressFactory) { |
| this.addressFactory = addressFactory; |
| if (hostEntries != null) { |
| entries = new ArrayList<>(hostEntries); |
| if ((hostEntries.size() == 1) && (hostEntries.contains(WILDCARD_VALUE))) { |
| all = true; |
| inetAddresses = null; |
| cidrAddresses = null; |
| } else { |
| all = false; |
| Set<InetAddress> addrs = new HashSet<>(); |
| List<SubnetUtils.SubnetInfo> cidrs = new LinkedList<SubnetUtils.SubnetInfo>(); |
| for (String hostEntry : hostEntries) { |
| //ip address range |
| if (hostEntry.indexOf("/") > -1) { |
| try { |
| SubnetUtils subnet = new SubnetUtils(hostEntry); |
| subnet.setInclusiveHostCount(true); |
| cidrs.add(subnet.getInfo()); |
| } catch (IllegalArgumentException e) { |
| LOG.warn("Invalid CIDR syntax : " + hostEntry); |
| throw e; |
| } |
| } else { |
| try { |
| addrs.add(addressFactory.getByName(hostEntry)); |
| } catch (UnknownHostException e) { |
| LOG.warn(e.toString()); |
| } |
| } |
| } |
| inetAddresses = (addrs.size() > 0) ? addrs : null; |
| cidrAddresses = (cidrs.size() > 0) ? cidrs : null; |
| } |
| } else { |
| all = false; |
| inetAddresses = null; |
| cidrAddresses = null; |
| entries = Collections.emptyList(); |
| } |
| } |
| /** |
| * Accepts an ip address and return true if ipAddress is in the list. |
| * {@link #includes(InetAddress)} should be preferred |
| * to avoid possibly re-resolving the ip address. |
| * |
| * @param ipAddress |
| * @return true if ipAddress is part of the list |
| */ |
| public boolean includes(String ipAddress) { |
| |
| if (all) { |
| return true; |
| } |
| |
| if (ipAddress == null) { |
| throw new IllegalArgumentException("ipAddress is null."); |
| } |
| |
| try { |
| return includes(addressFactory.getByName(ipAddress)); |
| } catch (UnknownHostException e) { |
| return false; |
| } |
| } |
| |
| /** |
| * Accepts an inet address and return true if address is in the list. |
| * @param address |
| * @return true if address is part of the list |
| */ |
| public boolean includes(InetAddress address) { |
| if (all) { |
| return true; |
| } |
| if (address == null) { |
| throw new IllegalArgumentException("address is null."); |
| } |
| if (inetAddresses != null && inetAddresses.contains(address)) { |
| return true; |
| } |
| // iterate through the ip ranges for inclusion |
| if (cidrAddresses != null) { |
| String ipAddress = address.getHostAddress(); |
| for(SubnetUtils.SubnetInfo cidrAddress : cidrAddresses) { |
| if(cidrAddress.isInRange(ipAddress)) { |
| return true; |
| } |
| } |
| } |
| return false; |
| } |
| /** |
| * returns the contents of the MachineList as a Collection<String> . |
| * This can be used for testing . |
| * |
| * @return contents of the MachineList. |
| */ |
| @VisibleForTesting |
| public Collection<String> getCollection() { |
| return entries; |
| } |
| } |