c0ae5e697c
Motivation: Right now to customize DNS name resolver when using DnsAddressResolverGroup one should subclass implementation and override newNameResolver method when in fact it's possible to collect all settings in a DnsNameResolverBuilder instance. Described in #7749. Modifications: - Added new constructor for DnsNameResolverBuilder in order to delay EventLoop specification - Added copy() method to DnsNameResolverBuilder to provide an immutable copy of the builder - Added new single-argument constructor for DnsAddressResolverGroup and RoundRobinDnsAddressResolverGroup accepting DnsNameResolverBuilder instance - DnsAddressResolverGroup to build a new resolver using DnsNameResolverBuilder given instead of creating a new one - Test cases to check that changing channelFactory after the builder was passed to create a DnsNameResolverGroup would not propagate to the name resolver Result: Much easier to customize DNS settings w/o subclassing DnsAddressResolverGroup
1641 lines
66 KiB
Java
1641 lines
66 KiB
Java
/*
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* Copyright 2015 The Netty Project
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*
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* The Netty Project licenses this file to you under the Apache License,
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* version 2.0 (the "License"); you may not use this file except in compliance
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* with the License. You may obtain a copy of the License at:
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*
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* http://www.apache.org/licenses/LICENSE-2.0
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*
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* Unless required by applicable law or agreed to in writing, software
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* distributed under the License is distributed on an "AS IS" BASIS, WITHOUT
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* WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. See the
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* License for the specific language governing permissions and limitations
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* under the License.
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*/
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package io.netty.resolver.dns;
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import io.netty.buffer.ByteBuf;
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import io.netty.buffer.ByteBufHolder;
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import io.netty.channel.AddressedEnvelope;
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import io.netty.channel.ChannelFactory;
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import io.netty.channel.ChannelFuture;
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import io.netty.channel.EventLoop;
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import io.netty.channel.EventLoopGroup;
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import io.netty.channel.ReflectiveChannelFactory;
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import io.netty.channel.nio.NioEventLoopGroup;
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import io.netty.channel.socket.DatagramChannel;
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import io.netty.channel.socket.InternetProtocolFamily;
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import io.netty.channel.socket.nio.NioDatagramChannel;
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import io.netty.handler.codec.dns.DefaultDnsQuestion;
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import io.netty.handler.codec.dns.DnsQuestion;
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import io.netty.handler.codec.dns.DnsRawRecord;
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import io.netty.handler.codec.dns.DnsRecord;
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import io.netty.handler.codec.dns.DnsRecordType;
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import io.netty.handler.codec.dns.DnsResponse;
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import io.netty.handler.codec.dns.DnsResponseCode;
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import io.netty.handler.codec.dns.DnsSection;
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import io.netty.resolver.HostsFileEntriesResolver;
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import io.netty.resolver.ResolvedAddressTypes;
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import io.netty.util.NetUtil;
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import io.netty.util.ReferenceCountUtil;
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import io.netty.util.concurrent.Future;
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import io.netty.util.internal.PlatformDependent;
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import io.netty.util.internal.SocketUtils;
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import io.netty.util.internal.StringUtil;
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import io.netty.util.internal.logging.InternalLogger;
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import io.netty.util.internal.logging.InternalLoggerFactory;
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import org.apache.directory.server.dns.DnsException;
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import org.apache.directory.server.dns.messages.DnsMessage;
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import org.apache.directory.server.dns.messages.QuestionRecord;
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import org.apache.directory.server.dns.messages.RecordClass;
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import org.apache.directory.server.dns.messages.RecordType;
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import org.apache.directory.server.dns.messages.ResourceRecord;
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import org.apache.directory.server.dns.messages.ResourceRecordModifier;
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import org.apache.directory.server.dns.messages.ResponseCode;
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import org.apache.directory.server.dns.store.DnsAttribute;
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import org.apache.directory.server.dns.store.RecordStore;
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import org.hamcrest.Matchers;
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import org.junit.AfterClass;
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import org.junit.BeforeClass;
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import org.junit.Test;
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import java.io.IOException;
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import java.net.InetAddress;
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import java.net.InetSocketAddress;
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import java.net.UnknownHostException;
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import java.util.ArrayDeque;
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import java.util.ArrayList;
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import java.util.Arrays;
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import java.util.Collection;
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import java.util.Collections;
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import java.util.Comparator;
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import java.util.HashMap;
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import java.util.HashSet;
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import java.util.Iterator;
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import java.util.LinkedHashMap;
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import java.util.List;
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import java.util.Map;
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import java.util.Map.Entry;
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import java.util.Queue;
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import java.util.Set;
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import java.util.concurrent.ConcurrentLinkedQueue;
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import java.util.concurrent.CountDownLatch;
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import java.util.concurrent.TimeUnit;
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import java.util.concurrent.atomic.AtomicBoolean;
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import static io.netty.handler.codec.dns.DnsRecordType.A;
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import static io.netty.handler.codec.dns.DnsRecordType.AAAA;
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import static io.netty.handler.codec.dns.DnsRecordType.CNAME;
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import static io.netty.resolver.dns.DefaultDnsServerAddressStreamProvider.DNS_PORT;
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import static io.netty.resolver.dns.DnsServerAddresses.sequential;
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import static org.hamcrest.Matchers.greaterThan;
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import static org.hamcrest.Matchers.hasSize;
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import static org.hamcrest.Matchers.instanceOf;
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import static org.hamcrest.Matchers.is;
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import static org.junit.Assert.assertEquals;
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import static org.junit.Assert.assertNotEquals;
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import static org.junit.Assert.assertNotNull;
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import static org.junit.Assert.assertNull;
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import static org.junit.Assert.assertThat;
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import static org.junit.Assert.assertTrue;
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import static org.junit.Assert.fail;
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public class DnsNameResolverTest {
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private static final InternalLogger logger = InternalLoggerFactory.getInstance(DnsNameResolver.class);
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private static final long DEFAULT_TEST_TIMEOUT_MS = 30000;
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// Using the top-100 web sites ranked in Alexa.com (Oct 2014)
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// Please use the following series of shell commands to get this up-to-date:
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// $ curl -O http://s3.amazonaws.com/alexa-static/top-1m.csv.zip
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// $ unzip -o top-1m.csv.zip top-1m.csv
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// $ head -100 top-1m.csv | cut -d, -f2 | cut -d/ -f1 | while read L; do echo '"'"$L"'",'; done > topsites.txt
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private static final Set<String> DOMAINS = Collections.unmodifiableSet(new HashSet<String>(Arrays.asList(
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"google.com",
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"youtube.com",
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"facebook.com",
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"baidu.com",
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"wikipedia.org",
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"yahoo.com",
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"reddit.com",
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"google.co.in",
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"qq.com",
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"amazon.com",
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"taobao.com",
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"tmall.com",
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"twitter.com",
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"vk.com",
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"live.com",
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"sohu.com",
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"instagram.com",
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"google.co.jp",
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"sina.com.cn",
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"jd.com",
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"weibo.com",
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"360.cn",
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"google.de",
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"google.co.uk",
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"google.com.br",
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"list.tmall.com",
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"google.ru",
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"google.fr",
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"yandex.ru",
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"netflix.com",
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"google.it",
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"google.com.hk",
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"linkedin.com",
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"pornhub.com",
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"t.co",
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"google.es",
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"twitch.tv",
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"alipay.com",
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"xvideos.com",
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"ebay.com",
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"yahoo.co.jp",
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"google.ca",
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"google.com.mx",
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"bing.com",
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"ok.ru",
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"imgur.com",
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"microsoft.com",
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"mail.ru",
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"imdb.com",
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"aliexpress.com",
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"hao123.com",
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"msn.com",
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"tumblr.com",
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"csdn.net",
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"wikia.com",
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"wordpress.com",
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"office.com",
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"google.com.tr",
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"livejasmin.com",
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"amazon.co.jp",
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"deloton.com",
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"apple.com",
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"google.com.au",
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"paypal.com",
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"google.com.tw",
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"bongacams.com",
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"popads.net",
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"whatsapp.com",
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"blogspot.com",
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"detail.tmall.com",
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"google.pl",
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"microsoftonline.com",
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"xhamster.com",
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"google.co.id",
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"github.com",
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"stackoverflow.com",
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"pinterest.com",
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"amazon.de",
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"diply.com",
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"amazon.co.uk",
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"so.com",
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"google.com.ar",
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"coccoc.com",
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"soso.com",
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"espn.com",
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"adobe.com",
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"google.com.ua",
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"tianya.cn",
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"xnxx.com",
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"googleusercontent.com",
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"savefrom.net",
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"google.com.pk",
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"amazon.in",
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"nicovideo.jp",
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"google.co.th",
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"dropbox.com",
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"thepiratebay.org",
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"google.com.sa",
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"google.com.eg",
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"pixnet.net",
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"localhost")));
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private static final Map<String, String> DOMAINS_PUNYCODE = new HashMap<String, String>();
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static {
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DOMAINS_PUNYCODE.put("büchner.de", "xn--bchner-3ya.de");
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DOMAINS_PUNYCODE.put("müller.de", "xn--mller-kva.de");
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}
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private static final Set<String> DOMAINS_ALL;
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static {
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Set<String> all = new HashSet<String>(DOMAINS.size() + DOMAINS_PUNYCODE.size());
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all.addAll(DOMAINS);
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all.addAll(DOMAINS_PUNYCODE.values());
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DOMAINS_ALL = Collections.unmodifiableSet(all);
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}
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/**
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* The list of the domain names to exclude from {@link #testResolveAorAAAA()}.
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*/
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private static final Set<String> EXCLUSIONS_RESOLVE_A = new HashSet<String>();
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static {
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Collections.addAll(
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EXCLUSIONS_RESOLVE_A,
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"akamaihd.net",
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"googleusercontent.com",
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StringUtil.EMPTY_STRING);
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}
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/**
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* The list of the domain names to exclude from {@link #testResolveAAAA()}.
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* Unfortunately, there are only handful of domain names with IPv6 addresses.
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*/
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private static final Set<String> EXCLUSIONS_RESOLVE_AAAA = new HashSet<String>();
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static {
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EXCLUSIONS_RESOLVE_AAAA.addAll(EXCLUSIONS_RESOLVE_A);
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EXCLUSIONS_RESOLVE_AAAA.addAll(DOMAINS);
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EXCLUSIONS_RESOLVE_AAAA.removeAll(Arrays.asList(
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"google.com",
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"facebook.com",
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"youtube.com",
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"wikipedia.org",
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"google.co.in",
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"blogspot.com",
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"vk.com",
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"google.de",
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"google.co.jp",
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"google.co.uk",
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"google.fr",
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"google.com.br",
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"google.ru",
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"google.it",
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"google.es",
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"google.com.mx",
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"xhamster.com",
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"google.ca",
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"google.co.id",
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"blogger.com",
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"flipkart.com",
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"google.com.tr",
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"google.com.au",
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"google.pl",
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"google.com.hk",
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"blogspot.in"
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));
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}
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/**
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* The list of the domain names to exclude from {@link #testQueryMx()}.
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*/
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private static final Set<String> EXCLUSIONS_QUERY_MX = new HashSet<String>();
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static {
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Collections.addAll(
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EXCLUSIONS_QUERY_MX,
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"hao123.com",
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"blogspot.com",
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"t.co",
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"espn.go.com",
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"people.com.cn",
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"googleusercontent.com",
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"blogspot.in",
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"localhost",
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StringUtil.EMPTY_STRING);
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}
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private static final TestDnsServer dnsServer = new TestDnsServer(DOMAINS_ALL);
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private static final EventLoopGroup group = new NioEventLoopGroup(1);
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private static DnsNameResolverBuilder newResolver(boolean decodeToUnicode) {
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return newResolver(decodeToUnicode, null);
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}
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private static DnsNameResolverBuilder newResolver(boolean decodeToUnicode,
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DnsServerAddressStreamProvider dnsServerAddressStreamProvider) {
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DnsNameResolverBuilder builder = new DnsNameResolverBuilder(group.next())
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.dnsQueryLifecycleObserverFactory(new TestRecursiveCacheDnsQueryLifecycleObserverFactory())
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.channelType(NioDatagramChannel.class)
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.maxQueriesPerResolve(1)
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.decodeIdn(decodeToUnicode)
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.optResourceEnabled(false)
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.ndots(1);
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if (dnsServerAddressStreamProvider == null) {
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builder.nameServerProvider(new SingletonDnsServerAddressStreamProvider(dnsServer.localAddress()));
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} else {
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builder.nameServerProvider(new MultiDnsServerAddressStreamProvider(dnsServerAddressStreamProvider,
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new SingletonDnsServerAddressStreamProvider(dnsServer.localAddress())));
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}
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return builder;
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}
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private static DnsNameResolverBuilder newResolver() {
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return newResolver(true);
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}
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private static DnsNameResolverBuilder newResolver(ResolvedAddressTypes resolvedAddressTypes) {
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return newResolver()
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.resolvedAddressTypes(resolvedAddressTypes);
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}
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private static DnsNameResolverBuilder newNonCachedResolver(ResolvedAddressTypes resolvedAddressTypes) {
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return newResolver()
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.resolveCache(NoopDnsCache.INSTANCE)
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.resolvedAddressTypes(resolvedAddressTypes);
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}
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@BeforeClass
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public static void init() throws Exception {
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dnsServer.start();
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}
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@AfterClass
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public static void destroy() {
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dnsServer.stop();
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group.shutdownGracefully();
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}
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@Test
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public void testResolveAorAAAA() throws Exception {
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DnsNameResolver resolver = newResolver(ResolvedAddressTypes.IPV4_PREFERRED).build();
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try {
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testResolve0(resolver, EXCLUSIONS_RESOLVE_A, AAAA);
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} finally {
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resolver.close();
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}
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}
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@Test
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public void testResolveAAAAorA() throws Exception {
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DnsNameResolver resolver = newResolver(ResolvedAddressTypes.IPV6_PREFERRED).build();
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try {
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testResolve0(resolver, EXCLUSIONS_RESOLVE_A, A);
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} finally {
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resolver.close();
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}
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}
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/**
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* This test will start an second DNS test server which returns fixed results that can be easily verified as
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* originating from the second DNS test server. The resolver will put {@link DnsServerAddressStreamProvider} under
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* test to ensure that some hostnames can be directed toward both the primary and secondary DNS test servers
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* simultaneously.
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*/
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@Test
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public void testNameServerCache() throws IOException, InterruptedException {
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final String overriddenIP = "12.34.12.34";
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final TestDnsServer dnsServer2 = new TestDnsServer(new RecordStore() {
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@Override
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public Set<ResourceRecord> getRecords(QuestionRecord question) throws DnsException {
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ResourceRecordModifier rm = new ResourceRecordModifier();
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rm.setDnsClass(RecordClass.IN);
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rm.setDnsName(question.getDomainName());
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rm.setDnsTtl(100);
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rm.setDnsType(question.getRecordType());
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switch (question.getRecordType()) {
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case A:
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rm.put(DnsAttribute.IP_ADDRESS, overriddenIP);
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break;
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default:
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return null;
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}
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return Collections.singleton(rm.getEntry());
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}
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});
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dnsServer2.start();
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try {
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final Set<String> overridenHostnames = new HashSet<String>();
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for (String name : DOMAINS) {
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if (EXCLUSIONS_RESOLVE_A.contains(name)) {
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continue;
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}
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if (PlatformDependent.threadLocalRandom().nextBoolean()) {
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overridenHostnames.add(name);
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}
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}
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DnsNameResolver resolver = newResolver(false, new DnsServerAddressStreamProvider() {
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@Override
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public DnsServerAddressStream nameServerAddressStream(String hostname) {
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return overridenHostnames.contains(hostname) ? sequential(dnsServer2.localAddress()).stream() :
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null;
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}
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}).build();
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try {
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final Map<String, InetAddress> resultA = testResolve0(resolver, EXCLUSIONS_RESOLVE_A, AAAA);
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for (Entry<String, InetAddress> resolvedEntry : resultA.entrySet()) {
|
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if (resolvedEntry.getValue().isLoopbackAddress()) {
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continue;
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}
|
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if (overridenHostnames.contains(resolvedEntry.getKey())) {
|
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assertEquals("failed to resolve " + resolvedEntry.getKey(),
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overriddenIP, resolvedEntry.getValue().getHostAddress());
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} else {
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assertNotEquals("failed to resolve " + resolvedEntry.getKey(),
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overriddenIP, resolvedEntry.getValue().getHostAddress());
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}
|
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}
|
|
} finally {
|
|
resolver.close();
|
|
}
|
|
} finally {
|
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dnsServer2.stop();
|
|
}
|
|
}
|
|
|
|
@Test
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|
public void testResolveA() throws Exception {
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DnsNameResolver resolver = newResolver(ResolvedAddressTypes.IPV4_ONLY)
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// Cache for eternity
|
|
.ttl(Integer.MAX_VALUE, Integer.MAX_VALUE)
|
|
.build();
|
|
try {
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|
final Map<String, InetAddress> resultA = testResolve0(resolver, EXCLUSIONS_RESOLVE_A, null);
|
|
|
|
// Now, try to resolve again to see if it's cached.
|
|
// This test works because the DNS servers usually randomizes the order of the records in a response.
|
|
// If cached, the resolved addresses must be always same, because we reuse the same response.
|
|
|
|
final Map<String, InetAddress> resultB = testResolve0(resolver, EXCLUSIONS_RESOLVE_A, null);
|
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|
|
// Ensure the result from the cache is identical from the uncached one.
|
|
assertThat(resultB.size(), is(resultA.size()));
|
|
for (Entry<String, InetAddress> e: resultA.entrySet()) {
|
|
InetAddress expected = e.getValue();
|
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InetAddress actual = resultB.get(e.getKey());
|
|
if (!actual.equals(expected)) {
|
|
// Print the content of the cache when test failure is expected.
|
|
System.err.println("Cache for " + e.getKey() + ": " + resolver.resolveAll(e.getKey()).getNow());
|
|
}
|
|
assertThat(actual, is(expected));
|
|
}
|
|
} finally {
|
|
resolver.close();
|
|
}
|
|
}
|
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|
|
@Test
|
|
public void testResolveAAAA() throws Exception {
|
|
DnsNameResolver resolver = newResolver(ResolvedAddressTypes.IPV6_ONLY).build();
|
|
try {
|
|
testResolve0(resolver, EXCLUSIONS_RESOLVE_AAAA, null);
|
|
} finally {
|
|
resolver.close();
|
|
}
|
|
}
|
|
|
|
@Test
|
|
public void testNonCachedResolve() throws Exception {
|
|
DnsNameResolver resolver = newNonCachedResolver(ResolvedAddressTypes.IPV4_ONLY).build();
|
|
try {
|
|
testResolve0(resolver, EXCLUSIONS_RESOLVE_A, null);
|
|
} finally {
|
|
resolver.close();
|
|
}
|
|
}
|
|
|
|
@Test(timeout = DEFAULT_TEST_TIMEOUT_MS)
|
|
public void testNonCachedResolveEmptyHostName() throws Exception {
|
|
testNonCachedResolveEmptyHostName("");
|
|
}
|
|
|
|
@Test(timeout = DEFAULT_TEST_TIMEOUT_MS)
|
|
public void testNonCachedResolveNullHostName() throws Exception {
|
|
testNonCachedResolveEmptyHostName(null);
|
|
}
|
|
|
|
public void testNonCachedResolveEmptyHostName(String inetHost) throws Exception {
|
|
DnsNameResolver resolver = newNonCachedResolver(ResolvedAddressTypes.IPV4_ONLY).build();
|
|
try {
|
|
InetAddress addr = resolver.resolve(inetHost).syncUninterruptibly().getNow();
|
|
assertEquals(SocketUtils.addressByName(inetHost), addr);
|
|
} finally {
|
|
resolver.close();
|
|
}
|
|
}
|
|
|
|
@Test(timeout = DEFAULT_TEST_TIMEOUT_MS)
|
|
public void testNonCachedResolveAllEmptyHostName() throws Exception {
|
|
testNonCachedResolveAllEmptyHostName("");
|
|
}
|
|
|
|
@Test(timeout = DEFAULT_TEST_TIMEOUT_MS)
|
|
public void testNonCachedResolveAllNullHostName() throws Exception {
|
|
testNonCachedResolveAllEmptyHostName(null);
|
|
}
|
|
|
|
private static void testNonCachedResolveAllEmptyHostName(String inetHost) throws UnknownHostException {
|
|
DnsNameResolver resolver = newNonCachedResolver(ResolvedAddressTypes.IPV4_ONLY).build();
|
|
try {
|
|
List<InetAddress> addrs = resolver.resolveAll(inetHost).syncUninterruptibly().getNow();
|
|
assertEquals(Arrays.asList(
|
|
SocketUtils.allAddressesByName(inetHost)), addrs);
|
|
} finally {
|
|
resolver.close();
|
|
}
|
|
}
|
|
|
|
private static Map<String, InetAddress> testResolve0(DnsNameResolver resolver, Set<String> excludedDomains,
|
|
DnsRecordType cancelledType)
|
|
throws InterruptedException {
|
|
|
|
assertThat(resolver.isRecursionDesired(), is(true));
|
|
|
|
final Map<String, InetAddress> results = new HashMap<String, InetAddress>();
|
|
final Map<String, Future<InetAddress>> futures =
|
|
new LinkedHashMap<String, Future<InetAddress>>();
|
|
|
|
for (String name : DOMAINS) {
|
|
if (excludedDomains.contains(name)) {
|
|
continue;
|
|
}
|
|
|
|
resolve(resolver, futures, name);
|
|
}
|
|
|
|
for (Entry<String, Future<InetAddress>> e : futures.entrySet()) {
|
|
String unresolved = e.getKey();
|
|
InetAddress resolved = e.getValue().sync().getNow();
|
|
|
|
logger.info("{}: {}", unresolved, resolved.getHostAddress());
|
|
|
|
assertThat(resolved.getHostName(), is(unresolved));
|
|
|
|
boolean typeMatches = false;
|
|
for (InternetProtocolFamily f: resolver.resolvedInternetProtocolFamiliesUnsafe()) {
|
|
Class<?> resolvedType = resolved.getClass();
|
|
if (f.addressType().isAssignableFrom(resolvedType)) {
|
|
typeMatches = true;
|
|
}
|
|
}
|
|
|
|
assertThat(typeMatches, is(true));
|
|
|
|
results.put(resolved.getHostName(), resolved);
|
|
}
|
|
|
|
assertQueryObserver(resolver, cancelledType);
|
|
|
|
return results;
|
|
}
|
|
|
|
@Test
|
|
public void testQueryMx() throws Exception {
|
|
DnsNameResolver resolver = newResolver().build();
|
|
try {
|
|
assertThat(resolver.isRecursionDesired(), is(true));
|
|
|
|
Map<String, Future<AddressedEnvelope<DnsResponse, InetSocketAddress>>> futures =
|
|
new LinkedHashMap<String, Future<AddressedEnvelope<DnsResponse, InetSocketAddress>>>();
|
|
for (String name: DOMAINS) {
|
|
if (EXCLUSIONS_QUERY_MX.contains(name)) {
|
|
continue;
|
|
}
|
|
|
|
queryMx(resolver, futures, name);
|
|
}
|
|
|
|
for (Entry<String, Future<AddressedEnvelope<DnsResponse, InetSocketAddress>>> e: futures.entrySet()) {
|
|
String hostname = e.getKey();
|
|
Future<AddressedEnvelope<DnsResponse, InetSocketAddress>> f = e.getValue().awaitUninterruptibly();
|
|
|
|
DnsResponse response = f.getNow().content();
|
|
assertThat(response.code(), is(DnsResponseCode.NOERROR));
|
|
|
|
final int answerCount = response.count(DnsSection.ANSWER);
|
|
final List<DnsRecord> mxList = new ArrayList<DnsRecord>(answerCount);
|
|
for (int i = 0; i < answerCount; i ++) {
|
|
final DnsRecord r = response.recordAt(DnsSection.ANSWER, i);
|
|
if (r.type() == DnsRecordType.MX) {
|
|
mxList.add(r);
|
|
}
|
|
}
|
|
|
|
assertThat(mxList.size(), is(greaterThan(0)));
|
|
StringBuilder buf = new StringBuilder();
|
|
for (DnsRecord r: mxList) {
|
|
ByteBuf recordContent = ((ByteBufHolder) r).content();
|
|
|
|
buf.append(StringUtil.NEWLINE);
|
|
buf.append('\t');
|
|
buf.append(r.name());
|
|
buf.append(' ');
|
|
buf.append(r.type().name());
|
|
buf.append(' ');
|
|
buf.append(recordContent.readUnsignedShort());
|
|
buf.append(' ');
|
|
buf.append(DnsResolveContext.decodeDomainName(recordContent));
|
|
}
|
|
|
|
logger.info("{} has the following MX records:{}", hostname, buf);
|
|
response.release();
|
|
|
|
// We only track query lifecycle if it is managed by the DnsNameResolverContext, and not direct calls
|
|
// to query.
|
|
assertNoQueriesMade(resolver);
|
|
}
|
|
} finally {
|
|
resolver.close();
|
|
}
|
|
}
|
|
|
|
@Test
|
|
public void testNegativeTtl() throws Exception {
|
|
final DnsNameResolver resolver = newResolver().negativeTtl(10).build();
|
|
try {
|
|
resolveNonExistentDomain(resolver);
|
|
|
|
final int size = 10000;
|
|
final List<UnknownHostException> exceptions = new ArrayList<UnknownHostException>();
|
|
|
|
// If negative cache works, this thread should be done really quickly.
|
|
final Thread negativeLookupThread = new Thread() {
|
|
@Override
|
|
public void run() {
|
|
for (int i = 0; i < size; i++) {
|
|
exceptions.add(resolveNonExistentDomain(resolver));
|
|
if (isInterrupted()) {
|
|
break;
|
|
}
|
|
}
|
|
}
|
|
};
|
|
|
|
negativeLookupThread.start();
|
|
negativeLookupThread.join(DEFAULT_TEST_TIMEOUT_MS);
|
|
|
|
if (negativeLookupThread.isAlive()) {
|
|
negativeLookupThread.interrupt();
|
|
fail("Cached negative lookups did not finish quickly.");
|
|
}
|
|
|
|
assertThat(exceptions, hasSize(size));
|
|
} finally {
|
|
resolver.close();
|
|
}
|
|
}
|
|
|
|
private static UnknownHostException resolveNonExistentDomain(DnsNameResolver resolver) {
|
|
try {
|
|
resolver.resolve("non-existent.netty.io").sync();
|
|
fail();
|
|
return null;
|
|
} catch (Exception e) {
|
|
assertThat(e, is(instanceOf(UnknownHostException.class)));
|
|
|
|
TestRecursiveCacheDnsQueryLifecycleObserverFactory lifecycleObserverFactory =
|
|
(TestRecursiveCacheDnsQueryLifecycleObserverFactory) resolver.dnsQueryLifecycleObserverFactory();
|
|
TestDnsQueryLifecycleObserver observer = lifecycleObserverFactory.observers.poll();
|
|
if (observer != null) {
|
|
Object o = observer.events.poll();
|
|
if (o instanceof QueryCancelledEvent) {
|
|
assertTrue("unexpected type: " + observer.question,
|
|
observer.question.type() == CNAME || observer.question.type() == AAAA);
|
|
} else if (o instanceof QueryWrittenEvent) {
|
|
QueryFailedEvent failedEvent = (QueryFailedEvent) observer.events.poll();
|
|
} else if (!(o instanceof QueryFailedEvent)) {
|
|
fail("unexpected event type: " + o);
|
|
}
|
|
assertTrue(observer.events.isEmpty());
|
|
}
|
|
return (UnknownHostException) e;
|
|
}
|
|
}
|
|
|
|
@Test
|
|
public void testResolveIp() {
|
|
DnsNameResolver resolver = newResolver().build();
|
|
try {
|
|
InetAddress address = resolver.resolve("10.0.0.1").syncUninterruptibly().getNow();
|
|
|
|
assertEquals("10.0.0.1", address.getHostAddress());
|
|
|
|
// This address is already resolved, and so we shouldn't have to query for anything.
|
|
assertNoQueriesMade(resolver);
|
|
} finally {
|
|
resolver.close();
|
|
}
|
|
}
|
|
|
|
@Test
|
|
public void testResolveEmptyIpv4() {
|
|
testResolve0(ResolvedAddressTypes.IPV4_ONLY, NetUtil.LOCALHOST4, StringUtil.EMPTY_STRING);
|
|
}
|
|
|
|
@Test
|
|
public void testResolveEmptyIpv6() {
|
|
testResolve0(ResolvedAddressTypes.IPV6_ONLY, NetUtil.LOCALHOST6, StringUtil.EMPTY_STRING);
|
|
}
|
|
|
|
@Test
|
|
public void testResolveNullIpv4() {
|
|
testResolve0(ResolvedAddressTypes.IPV4_ONLY, NetUtil.LOCALHOST4, null);
|
|
}
|
|
|
|
@Test
|
|
public void testResolveNullIpv6() {
|
|
testResolve0(ResolvedAddressTypes.IPV6_ONLY, NetUtil.LOCALHOST6, null);
|
|
}
|
|
|
|
private static void testResolve0(ResolvedAddressTypes addressTypes, InetAddress expectedAddr, String name) {
|
|
DnsNameResolver resolver = newResolver(addressTypes).build();
|
|
try {
|
|
InetAddress address = resolver.resolve(name).syncUninterruptibly().getNow();
|
|
assertEquals(expectedAddr, address);
|
|
|
|
// We are resolving the local address, so we shouldn't make any queries.
|
|
assertNoQueriesMade(resolver);
|
|
} finally {
|
|
resolver.close();
|
|
}
|
|
}
|
|
|
|
@Test
|
|
public void testResolveAllEmptyIpv4() {
|
|
testResolveAll0(ResolvedAddressTypes.IPV4_ONLY, NetUtil.LOCALHOST4, StringUtil.EMPTY_STRING);
|
|
}
|
|
|
|
@Test
|
|
public void testResolveAllEmptyIpv6() {
|
|
testResolveAll0(ResolvedAddressTypes.IPV6_ONLY, NetUtil.LOCALHOST6, StringUtil.EMPTY_STRING);
|
|
}
|
|
|
|
@Test
|
|
public void testCNAMEResolveAllIpv4() throws IOException, InterruptedException {
|
|
testCNAMERecursiveResolve(true);
|
|
}
|
|
|
|
@Test
|
|
public void testCNAMEResolveAllIpv6() throws IOException, InterruptedException {
|
|
testCNAMERecursiveResolve(false);
|
|
}
|
|
|
|
private static void testCNAMERecursiveResolve(boolean ipv4Preferred) throws IOException, InterruptedException {
|
|
final String firstName = "firstname.com";
|
|
final String secondName = "secondname.com";
|
|
final String lastName = "lastname.com";
|
|
final String ipv4Addr = "1.2.3.4";
|
|
final String ipv6Addr = "::1";
|
|
TestDnsServer dnsServer2 = new TestDnsServer(new RecordStore() {
|
|
@Override
|
|
public Set<ResourceRecord> getRecords(QuestionRecord question) throws DnsException {
|
|
ResourceRecordModifier rm = new ResourceRecordModifier();
|
|
rm.setDnsClass(RecordClass.IN);
|
|
rm.setDnsName(question.getDomainName());
|
|
rm.setDnsTtl(100);
|
|
rm.setDnsType(RecordType.CNAME);
|
|
|
|
if (question.getDomainName().equals(firstName)) {
|
|
rm.put(DnsAttribute.DOMAIN_NAME, secondName);
|
|
} else if (question.getDomainName().equals(secondName)) {
|
|
rm.put(DnsAttribute.DOMAIN_NAME, lastName);
|
|
} else if (question.getDomainName().equals(lastName)) {
|
|
rm.setDnsType(question.getRecordType());
|
|
switch (question.getRecordType()) {
|
|
case A:
|
|
rm.put(DnsAttribute.IP_ADDRESS, ipv4Addr);
|
|
break;
|
|
case AAAA:
|
|
rm.put(DnsAttribute.IP_ADDRESS, ipv6Addr);
|
|
break;
|
|
default:
|
|
return null;
|
|
}
|
|
} else {
|
|
return null;
|
|
}
|
|
return Collections.singleton(rm.getEntry());
|
|
}
|
|
});
|
|
dnsServer2.start();
|
|
DnsNameResolver resolver = null;
|
|
try {
|
|
DnsNameResolverBuilder builder = newResolver()
|
|
.recursionDesired(true)
|
|
.maxQueriesPerResolve(16)
|
|
.nameServerProvider(new SingletonDnsServerAddressStreamProvider(dnsServer2.localAddress()));
|
|
if (ipv4Preferred) {
|
|
builder.resolvedAddressTypes(ResolvedAddressTypes.IPV4_PREFERRED);
|
|
} else {
|
|
builder.resolvedAddressTypes(ResolvedAddressTypes.IPV6_PREFERRED);
|
|
}
|
|
resolver = builder.build();
|
|
InetAddress resolvedAddress = resolver.resolve(firstName).syncUninterruptibly().getNow();
|
|
if (ipv4Preferred) {
|
|
assertEquals(ipv4Addr, resolvedAddress.getHostAddress());
|
|
} else {
|
|
assertEquals(ipv6Addr, NetUtil.toAddressString(resolvedAddress));
|
|
}
|
|
assertEquals(firstName, resolvedAddress.getHostName());
|
|
} finally {
|
|
dnsServer2.stop();
|
|
if (resolver != null) {
|
|
resolver.close();
|
|
}
|
|
}
|
|
}
|
|
|
|
@Test
|
|
public void testCNAMERecursiveResolveMultipleNameServersIPv4() throws IOException {
|
|
testCNAMERecursiveResolveMultipleNameServers(true);
|
|
}
|
|
|
|
@Test
|
|
public void testCNAMERecursiveResolveMultipleNameServersIPv6() throws IOException {
|
|
testCNAMERecursiveResolveMultipleNameServers(false);
|
|
}
|
|
|
|
private static void testCNAMERecursiveResolveMultipleNameServers(boolean ipv4Preferred) throws IOException {
|
|
final String firstName = "firstname.nettyfoo.com";
|
|
final String lastName = "lastname.nettybar.com";
|
|
final String ipv4Addr = "1.2.3.4";
|
|
final String ipv6Addr = "::1";
|
|
final AtomicBoolean hitServer2 = new AtomicBoolean();
|
|
final TestDnsServer dnsServer2 = new TestDnsServer(new RecordStore() {
|
|
@Override
|
|
public Set<ResourceRecord> getRecords(QuestionRecord question) throws DnsException {
|
|
hitServer2.set(true);
|
|
if (question.getDomainName().equals(firstName)) {
|
|
ResourceRecordModifier rm = new ResourceRecordModifier();
|
|
rm.setDnsClass(RecordClass.IN);
|
|
rm.setDnsName(question.getDomainName());
|
|
rm.setDnsTtl(100);
|
|
rm.setDnsType(RecordType.CNAME);
|
|
rm.put(DnsAttribute.DOMAIN_NAME, lastName);
|
|
return Collections.singleton(rm.getEntry());
|
|
} else {
|
|
throw new DnsException(ResponseCode.REFUSED);
|
|
}
|
|
}
|
|
});
|
|
final TestDnsServer dnsServer3 = new TestDnsServer(new RecordStore() {
|
|
@Override
|
|
public Set<ResourceRecord> getRecords(QuestionRecord question) throws DnsException {
|
|
if (question.getDomainName().equals(lastName)) {
|
|
ResourceRecordModifier rm = new ResourceRecordModifier();
|
|
rm.setDnsClass(RecordClass.IN);
|
|
rm.setDnsName(question.getDomainName());
|
|
rm.setDnsTtl(100);
|
|
rm.setDnsType(question.getRecordType());
|
|
switch (question.getRecordType()) {
|
|
case A:
|
|
rm.put(DnsAttribute.IP_ADDRESS, ipv4Addr);
|
|
break;
|
|
case AAAA:
|
|
rm.put(DnsAttribute.IP_ADDRESS, ipv6Addr);
|
|
break;
|
|
default:
|
|
return null;
|
|
}
|
|
|
|
return Collections.singleton(rm.getEntry());
|
|
} else {
|
|
throw new DnsException(ResponseCode.REFUSED);
|
|
}
|
|
}
|
|
});
|
|
dnsServer2.start();
|
|
dnsServer3.start();
|
|
DnsNameResolver resolver = null;
|
|
try {
|
|
DnsCache nsCache = new DefaultDnsCache();
|
|
// What we want to test is the following:
|
|
// 1. Do a DNS query.
|
|
// 2. CNAME is returned, we want to lookup that CNAME on multiple DNS servers
|
|
// 3. The first DNS server should fail
|
|
// 4. The second DNS server should succeed
|
|
// This verifies that we do in fact follow multiple DNS servers in the CNAME resolution.
|
|
// The DnsCache is used for the name server cache, but doesn't provide a InetSocketAddress (only InetAddress
|
|
// so no port), so we only specify the name server in the cache, and then specify both name servers in the
|
|
// fallback name server provider.
|
|
nsCache.cache("nettyfoo.com.", null, dnsServer2.localAddress().getAddress(), 10000, group.next());
|
|
resolver = new DnsNameResolver(
|
|
group.next(), new ReflectiveChannelFactory<DatagramChannel>(NioDatagramChannel.class),
|
|
NoopDnsCache.INSTANCE, nsCache, NoopDnsQueryLifecycleObserverFactory.INSTANCE, 3000,
|
|
ipv4Preferred ? ResolvedAddressTypes.IPV4_ONLY : ResolvedAddressTypes.IPV6_ONLY, true,
|
|
10, true, 4096, false, HostsFileEntriesResolver.DEFAULT,
|
|
new SequentialDnsServerAddressStreamProvider(dnsServer2.localAddress(), dnsServer3.localAddress()),
|
|
DnsNameResolver.DEFAULT_SEARCH_DOMAINS, 0, true) {
|
|
@Override
|
|
int dnsRedirectPort(InetAddress server) {
|
|
return hitServer2.get() ? dnsServer3.localAddress().getPort() : dnsServer2.localAddress().getPort();
|
|
}
|
|
};
|
|
InetAddress resolvedAddress = resolver.resolve(firstName).syncUninterruptibly().getNow();
|
|
if (ipv4Preferred) {
|
|
assertEquals(ipv4Addr, resolvedAddress.getHostAddress());
|
|
} else {
|
|
assertEquals(ipv6Addr, NetUtil.toAddressString(resolvedAddress));
|
|
}
|
|
assertEquals(firstName, resolvedAddress.getHostName());
|
|
} finally {
|
|
dnsServer2.stop();
|
|
dnsServer3.stop();
|
|
if (resolver != null) {
|
|
resolver.close();
|
|
}
|
|
}
|
|
}
|
|
|
|
@Test
|
|
public void testResolveAllNullIpv4() {
|
|
testResolveAll0(ResolvedAddressTypes.IPV4_ONLY, NetUtil.LOCALHOST4, null);
|
|
}
|
|
|
|
@Test
|
|
public void testResolveAllNullIpv6() {
|
|
testResolveAll0(ResolvedAddressTypes.IPV6_ONLY, NetUtil.LOCALHOST6, null);
|
|
}
|
|
|
|
private static void testResolveAll0(ResolvedAddressTypes addressTypes, InetAddress expectedAddr, String name) {
|
|
DnsNameResolver resolver = newResolver(addressTypes).build();
|
|
try {
|
|
List<InetAddress> addresses = resolver.resolveAll(name).syncUninterruptibly().getNow();
|
|
assertEquals(1, addresses.size());
|
|
assertEquals(expectedAddr, addresses.get(0));
|
|
|
|
// We are resolving the local address, so we shouldn't make any queries.
|
|
assertNoQueriesMade(resolver);
|
|
} finally {
|
|
resolver.close();
|
|
}
|
|
}
|
|
|
|
@Test
|
|
public void testResolveAllMx() {
|
|
final DnsNameResolver resolver = newResolver().build();
|
|
try {
|
|
assertThat(resolver.isRecursionDesired(), is(true));
|
|
|
|
final Map<String, Future<List<DnsRecord>>> futures = new LinkedHashMap<String, Future<List<DnsRecord>>>();
|
|
for (String name: DOMAINS) {
|
|
if (EXCLUSIONS_QUERY_MX.contains(name)) {
|
|
continue;
|
|
}
|
|
|
|
futures.put(name, resolver.resolveAll(new DefaultDnsQuestion(name, DnsRecordType.MX)));
|
|
}
|
|
|
|
for (Entry<String, Future<List<DnsRecord>>> e: futures.entrySet()) {
|
|
String hostname = e.getKey();
|
|
Future<List<DnsRecord>> f = e.getValue().awaitUninterruptibly();
|
|
|
|
final List<DnsRecord> mxList = f.getNow();
|
|
assertThat(mxList.size(), is(greaterThan(0)));
|
|
StringBuilder buf = new StringBuilder();
|
|
for (DnsRecord r: mxList) {
|
|
ByteBuf recordContent = ((ByteBufHolder) r).content();
|
|
|
|
buf.append(StringUtil.NEWLINE);
|
|
buf.append('\t');
|
|
buf.append(r.name());
|
|
buf.append(' ');
|
|
buf.append(r.type().name());
|
|
buf.append(' ');
|
|
buf.append(recordContent.readUnsignedShort());
|
|
buf.append(' ');
|
|
buf.append(DnsResolveContext.decodeDomainName(recordContent));
|
|
|
|
ReferenceCountUtil.release(r);
|
|
}
|
|
|
|
logger.info("{} has the following MX records:{}", hostname, buf);
|
|
}
|
|
} finally {
|
|
resolver.close();
|
|
}
|
|
}
|
|
|
|
@Test
|
|
public void testResolveAllHostsFile() {
|
|
final DnsNameResolver resolver = new DnsNameResolverBuilder(group.next())
|
|
.channelType(NioDatagramChannel.class)
|
|
.hostsFileEntriesResolver(new HostsFileEntriesResolver() {
|
|
@Override
|
|
public InetAddress address(String inetHost, ResolvedAddressTypes resolvedAddressTypes) {
|
|
if ("foo.com.".equals(inetHost)) {
|
|
try {
|
|
return InetAddress.getByAddress("foo.com", new byte[] { 1, 2, 3, 4 });
|
|
} catch (UnknownHostException e) {
|
|
throw new Error(e);
|
|
}
|
|
}
|
|
return null;
|
|
}
|
|
}).build();
|
|
|
|
final List<DnsRecord> records = resolver.resolveAll(new DefaultDnsQuestion("foo.com.", A))
|
|
.syncUninterruptibly().getNow();
|
|
assertThat(records, Matchers.<DnsRecord>hasSize(1));
|
|
assertThat(records.get(0), Matchers.<DnsRecord>instanceOf(DnsRawRecord.class));
|
|
|
|
final DnsRawRecord record = (DnsRawRecord) records.get(0);
|
|
final ByteBuf content = record.content();
|
|
assertThat(record.name(), is("foo.com."));
|
|
assertThat(record.dnsClass(), is(DnsRecord.CLASS_IN));
|
|
assertThat(record.type(), is(A));
|
|
assertThat(content.readableBytes(), is(4));
|
|
assertThat(content.readInt(), is(0x01020304));
|
|
record.release();
|
|
}
|
|
|
|
@Test
|
|
public void testResolveDecodeUnicode() {
|
|
testResolveUnicode(true);
|
|
}
|
|
|
|
@Test
|
|
public void testResolveNotDecodeUnicode() {
|
|
testResolveUnicode(false);
|
|
}
|
|
|
|
private static void testResolveUnicode(boolean decode) {
|
|
DnsNameResolver resolver = newResolver(decode).build();
|
|
try {
|
|
for (Entry<String, String> entries : DOMAINS_PUNYCODE.entrySet()) {
|
|
InetAddress address = resolver.resolve(entries.getKey()).syncUninterruptibly().getNow();
|
|
assertEquals(decode ? entries.getKey() : entries.getValue(), address.getHostName());
|
|
}
|
|
|
|
assertQueryObserver(resolver, AAAA);
|
|
} finally {
|
|
resolver.close();
|
|
}
|
|
}
|
|
|
|
@Test(timeout = DEFAULT_TEST_TIMEOUT_MS)
|
|
public void secondDnsServerShouldBeUsedBeforeCNAMEFirstServerNotStarted() throws IOException {
|
|
secondDnsServerShouldBeUsedBeforeCNAME(false);
|
|
}
|
|
|
|
@Test(timeout = DEFAULT_TEST_TIMEOUT_MS)
|
|
public void secondDnsServerShouldBeUsedBeforeCNAMEFirstServerFailResolve() throws IOException {
|
|
secondDnsServerShouldBeUsedBeforeCNAME(true);
|
|
}
|
|
|
|
private static void secondDnsServerShouldBeUsedBeforeCNAME(boolean startDnsServer1) throws IOException {
|
|
final String knownHostName = "netty.io";
|
|
final TestDnsServer dnsServer1 = new TestDnsServer(new HashSet<String>(Arrays.asList("notnetty.com")));
|
|
final TestDnsServer dnsServer2 = new TestDnsServer(new HashSet<String>(Arrays.asList(knownHostName)));
|
|
DnsNameResolver resolver = null;
|
|
try {
|
|
final InetSocketAddress dnsServer1Address;
|
|
if (startDnsServer1) {
|
|
dnsServer1.start();
|
|
dnsServer1Address = dnsServer1.localAddress();
|
|
} else {
|
|
// Some address where a DNS server will not be running.
|
|
dnsServer1Address = new InetSocketAddress("127.0.0.1", 22);
|
|
}
|
|
dnsServer2.start();
|
|
|
|
TestRecursiveCacheDnsQueryLifecycleObserverFactory lifecycleObserverFactory =
|
|
new TestRecursiveCacheDnsQueryLifecycleObserverFactory();
|
|
|
|
DnsNameResolverBuilder builder = new DnsNameResolverBuilder(group.next())
|
|
.dnsQueryLifecycleObserverFactory(lifecycleObserverFactory)
|
|
.resolvedAddressTypes(ResolvedAddressTypes.IPV4_ONLY)
|
|
.channelType(NioDatagramChannel.class)
|
|
.queryTimeoutMillis(1000) // We expect timeouts if startDnsServer1 is false
|
|
.optResourceEnabled(false)
|
|
.ndots(1);
|
|
|
|
builder.nameServerProvider(new SequentialDnsServerAddressStreamProvider(dnsServer1Address,
|
|
dnsServer2.localAddress()));
|
|
resolver = builder.build();
|
|
assertNotNull(resolver.resolve(knownHostName).syncUninterruptibly().getNow());
|
|
|
|
TestDnsQueryLifecycleObserver observer = lifecycleObserverFactory.observers.poll();
|
|
assertNotNull(observer);
|
|
assertEquals(1, lifecycleObserverFactory.observers.size());
|
|
assertEquals(2, observer.events.size());
|
|
QueryWrittenEvent writtenEvent = (QueryWrittenEvent) observer.events.poll();
|
|
assertEquals(dnsServer1Address, writtenEvent.dnsServerAddress);
|
|
QueryFailedEvent failedEvent = (QueryFailedEvent) observer.events.poll();
|
|
|
|
observer = lifecycleObserverFactory.observers.poll();
|
|
assertEquals(2, observer.events.size());
|
|
writtenEvent = (QueryWrittenEvent) observer.events.poll();
|
|
assertEquals(dnsServer2.localAddress(), writtenEvent.dnsServerAddress);
|
|
QuerySucceededEvent succeededEvent = (QuerySucceededEvent) observer.events.poll();
|
|
} finally {
|
|
if (resolver != null) {
|
|
resolver.close();
|
|
}
|
|
dnsServer1.stop();
|
|
dnsServer2.stop();
|
|
}
|
|
}
|
|
|
|
@Test(timeout = DEFAULT_TEST_TIMEOUT_MS)
|
|
public void aAndAAAAQueryShouldTryFirstDnsServerBeforeSecond() throws IOException {
|
|
final String knownHostName = "netty.io";
|
|
final TestDnsServer dnsServer1 = new TestDnsServer(new HashSet<String>(Arrays.asList("notnetty.com")));
|
|
final TestDnsServer dnsServer2 = new TestDnsServer(new HashSet<String>(Arrays.asList(knownHostName)));
|
|
DnsNameResolver resolver = null;
|
|
try {
|
|
dnsServer1.start();
|
|
dnsServer2.start();
|
|
|
|
TestRecursiveCacheDnsQueryLifecycleObserverFactory lifecycleObserverFactory =
|
|
new TestRecursiveCacheDnsQueryLifecycleObserverFactory();
|
|
|
|
DnsNameResolverBuilder builder = new DnsNameResolverBuilder(group.next())
|
|
.resolvedAddressTypes(ResolvedAddressTypes.IPV6_PREFERRED)
|
|
.dnsQueryLifecycleObserverFactory(lifecycleObserverFactory)
|
|
.channelType(NioDatagramChannel.class)
|
|
.optResourceEnabled(false)
|
|
.ndots(1);
|
|
|
|
builder.nameServerProvider(new SequentialDnsServerAddressStreamProvider(dnsServer1.localAddress(),
|
|
dnsServer2.localAddress()));
|
|
resolver = builder.build();
|
|
assertNotNull(resolver.resolve(knownHostName).syncUninterruptibly().getNow());
|
|
|
|
TestDnsQueryLifecycleObserver observer = lifecycleObserverFactory.observers.poll();
|
|
assertNotNull(observer);
|
|
assertEquals(2, lifecycleObserverFactory.observers.size());
|
|
assertEquals(2, observer.events.size());
|
|
QueryWrittenEvent writtenEvent = (QueryWrittenEvent) observer.events.poll();
|
|
assertEquals(dnsServer1.localAddress(), writtenEvent.dnsServerAddress);
|
|
QueryFailedEvent failedEvent = (QueryFailedEvent) observer.events.poll();
|
|
|
|
observer = lifecycleObserverFactory.observers.poll();
|
|
assertEquals(2, observer.events.size());
|
|
writtenEvent = (QueryWrittenEvent) observer.events.poll();
|
|
assertEquals(dnsServer1.localAddress(), writtenEvent.dnsServerAddress);
|
|
failedEvent = (QueryFailedEvent) observer.events.poll();
|
|
|
|
observer = lifecycleObserverFactory.observers.poll();
|
|
assertEquals(2, observer.events.size());
|
|
writtenEvent = (QueryWrittenEvent) observer.events.poll();
|
|
assertEquals(dnsServer2.localAddress(), writtenEvent.dnsServerAddress);
|
|
QuerySucceededEvent succeededEvent = (QuerySucceededEvent) observer.events.poll();
|
|
} finally {
|
|
if (resolver != null) {
|
|
resolver.close();
|
|
}
|
|
dnsServer1.stop();
|
|
dnsServer2.stop();
|
|
}
|
|
}
|
|
|
|
@Test
|
|
public void testRecursiveResolveNoCache() throws Exception {
|
|
testRecursiveResolveCache(false);
|
|
}
|
|
|
|
@Test
|
|
public void testRecursiveResolveCache() throws Exception {
|
|
testRecursiveResolveCache(true);
|
|
}
|
|
|
|
@Test
|
|
public void testIpv4PreferredWhenIpv6First() throws Exception {
|
|
testResolvesPreferredWhenNonPreferredFirst0(ResolvedAddressTypes.IPV4_PREFERRED);
|
|
}
|
|
|
|
@Test
|
|
public void testIpv6PreferredWhenIpv4First() throws Exception {
|
|
testResolvesPreferredWhenNonPreferredFirst0(ResolvedAddressTypes.IPV6_PREFERRED);
|
|
}
|
|
|
|
private static void testResolvesPreferredWhenNonPreferredFirst0(ResolvedAddressTypes types) throws Exception {
|
|
final String name = "netty.com";
|
|
// This store is non-compliant, returning records of the wrong type for a query.
|
|
// It works since we don't verify the type of the result when resolving to deal with
|
|
// non-compliant servers in the wild.
|
|
List<Set<ResourceRecord>> records = new ArrayList<Set<ResourceRecord>>();
|
|
final String ipv6Address = "0:0:0:0:0:0:1:1";
|
|
final String ipv4Address = "1.1.1.1";
|
|
if (types == ResolvedAddressTypes.IPV4_PREFERRED) {
|
|
records.add(newAddressRecord(name, RecordType.AAAA, ipv6Address));
|
|
records.add(newAddressRecord(name, RecordType.A, ipv4Address));
|
|
} else {
|
|
records.add(newAddressRecord(name, RecordType.A, ipv4Address));
|
|
records.add(newAddressRecord(name, RecordType.AAAA, ipv6Address));
|
|
}
|
|
final Iterator<Set<ResourceRecord>> recordsIterator = records.iterator();
|
|
RecordStore arbitrarilyOrderedStore = new RecordStore() {
|
|
@Override
|
|
public Set<ResourceRecord> getRecords(QuestionRecord questionRecord) {
|
|
return recordsIterator.next();
|
|
}
|
|
};
|
|
TestDnsServer nonCompliantDnsServer = new TestDnsServer(arbitrarilyOrderedStore);
|
|
nonCompliantDnsServer.start();
|
|
try {
|
|
DnsNameResolver resolver = newResolver(types)
|
|
.maxQueriesPerResolve(2)
|
|
.nameServerProvider(new SingletonDnsServerAddressStreamProvider(
|
|
nonCompliantDnsServer.localAddress()))
|
|
.build();
|
|
InetAddress resolved = resolver.resolve("netty.com").syncUninterruptibly().getNow();
|
|
if (types == ResolvedAddressTypes.IPV4_PREFERRED) {
|
|
assertEquals(ipv4Address, resolved.getHostAddress());
|
|
} else {
|
|
assertEquals(ipv6Address, resolved.getHostAddress());
|
|
}
|
|
} finally {
|
|
nonCompliantDnsServer.stop();
|
|
}
|
|
}
|
|
|
|
private static Set<ResourceRecord> newAddressRecord(String name, RecordType type, String address) {
|
|
ResourceRecordModifier rm = new ResourceRecordModifier();
|
|
rm.setDnsClass(RecordClass.IN);
|
|
rm.setDnsName(name);
|
|
rm.setDnsTtl(100);
|
|
rm.setDnsType(type);
|
|
rm.put(DnsAttribute.IP_ADDRESS, address);
|
|
return Collections.singleton(rm.getEntry());
|
|
}
|
|
|
|
private static void testRecursiveResolveCache(boolean cache)
|
|
throws Exception {
|
|
final String hostname = "some.record.netty.io";
|
|
final String hostname2 = "some2.record.netty.io";
|
|
|
|
final TestDnsServer dnsServerAuthority = new TestDnsServer(new HashSet<String>(
|
|
Arrays.asList(hostname, hostname2)));
|
|
dnsServerAuthority.start();
|
|
|
|
TestDnsServer dnsServer = new RedirectingTestDnsServer(hostname,
|
|
dnsServerAuthority.localAddress().getAddress().getHostAddress());
|
|
dnsServer.start();
|
|
|
|
TestDnsCache nsCache = new TestDnsCache(cache ? new DefaultDnsCache() : NoopDnsCache.INSTANCE);
|
|
TestRecursiveCacheDnsQueryLifecycleObserverFactory lifecycleObserverFactory =
|
|
new TestRecursiveCacheDnsQueryLifecycleObserverFactory();
|
|
EventLoopGroup group = new NioEventLoopGroup(1);
|
|
DnsNameResolver resolver = new DnsNameResolver(
|
|
group.next(), new ReflectiveChannelFactory<DatagramChannel>(NioDatagramChannel.class),
|
|
NoopDnsCache.INSTANCE, nsCache, lifecycleObserverFactory, 3000, ResolvedAddressTypes.IPV4_ONLY, true,
|
|
10, true, 4096, false, HostsFileEntriesResolver.DEFAULT,
|
|
new SingletonDnsServerAddressStreamProvider(dnsServer.localAddress()),
|
|
DnsNameResolver.DEFAULT_SEARCH_DOMAINS, 0, true) {
|
|
@Override
|
|
int dnsRedirectPort(InetAddress server) {
|
|
return server.equals(dnsServerAuthority.localAddress().getAddress()) ?
|
|
dnsServerAuthority.localAddress().getPort() : DNS_PORT;
|
|
}
|
|
};
|
|
|
|
// Java7 will strip of the "." so we need to adjust the expected dnsname. Both are valid in terms of the RFC
|
|
// so its ok.
|
|
String expectedDnsName = PlatformDependent.javaVersion() == 7 ?
|
|
"dns4.some.record.netty.io" : "dns4.some.record.netty.io.";
|
|
|
|
try {
|
|
resolver.resolveAll(hostname).syncUninterruptibly();
|
|
|
|
TestDnsQueryLifecycleObserver observer = lifecycleObserverFactory.observers.poll();
|
|
assertNotNull(observer);
|
|
assertTrue(lifecycleObserverFactory.observers.isEmpty());
|
|
assertEquals(4, observer.events.size());
|
|
QueryWrittenEvent writtenEvent1 = (QueryWrittenEvent) observer.events.poll();
|
|
assertEquals(dnsServer.localAddress(), writtenEvent1.dnsServerAddress);
|
|
QueryRedirectedEvent redirectedEvent = (QueryRedirectedEvent) observer.events.poll();
|
|
|
|
assertEquals(expectedDnsName, redirectedEvent.nameServers.get(0).getHostName());
|
|
assertEquals(dnsServerAuthority.localAddress(), redirectedEvent.nameServers.get(0));
|
|
QueryWrittenEvent writtenEvent2 = (QueryWrittenEvent) observer.events.poll();
|
|
assertEquals(dnsServerAuthority.localAddress(), writtenEvent2.dnsServerAddress);
|
|
QuerySucceededEvent succeededEvent = (QuerySucceededEvent) observer.events.poll();
|
|
|
|
if (cache) {
|
|
assertNull(nsCache.cache.get("io.", null));
|
|
assertNull(nsCache.cache.get("netty.io.", null));
|
|
List<? extends DnsCacheEntry> entries = nsCache.cache.get("record.netty.io.", null);
|
|
assertEquals(1, entries.size());
|
|
|
|
assertNull(nsCache.cache.get(hostname, null));
|
|
|
|
// Test again via cache.
|
|
resolver.resolveAll(hostname).syncUninterruptibly();
|
|
|
|
observer = lifecycleObserverFactory.observers.poll();
|
|
assertNotNull(observer);
|
|
assertTrue(lifecycleObserverFactory.observers.isEmpty());
|
|
assertEquals(2, observer.events.size());
|
|
writtenEvent1 = (QueryWrittenEvent) observer.events.poll();
|
|
assertEquals(expectedDnsName, writtenEvent1.dnsServerAddress.getHostName());
|
|
assertEquals(dnsServerAuthority.localAddress(), writtenEvent1.dnsServerAddress);
|
|
succeededEvent = (QuerySucceededEvent) observer.events.poll();
|
|
|
|
resolver.resolveAll(hostname2).syncUninterruptibly();
|
|
|
|
observer = lifecycleObserverFactory.observers.poll();
|
|
assertNotNull(observer);
|
|
assertTrue(lifecycleObserverFactory.observers.isEmpty());
|
|
assertEquals(2, observer.events.size());
|
|
writtenEvent1 = (QueryWrittenEvent) observer.events.poll();
|
|
assertEquals(expectedDnsName, writtenEvent1.dnsServerAddress.getHostName());
|
|
assertEquals(dnsServerAuthority.localAddress(), writtenEvent1.dnsServerAddress);
|
|
succeededEvent = (QuerySucceededEvent) observer.events.poll();
|
|
|
|
// Check that it only queried the cache for record.netty.io.
|
|
assertNull(nsCache.cacheHits.get("io."));
|
|
assertNull(nsCache.cacheHits.get("netty.io."));
|
|
assertNotNull(nsCache.cacheHits.get("record.netty.io."));
|
|
assertNull(nsCache.cacheHits.get("some.record.netty.io."));
|
|
}
|
|
} finally {
|
|
resolver.close();
|
|
group.shutdownGracefully(0, 0, TimeUnit.SECONDS);
|
|
dnsServer.stop();
|
|
dnsServerAuthority.stop();
|
|
}
|
|
}
|
|
|
|
private static void resolve(DnsNameResolver resolver, Map<String, Future<InetAddress>> futures, String hostname) {
|
|
futures.put(hostname, resolver.resolve(hostname));
|
|
}
|
|
|
|
private static void queryMx(
|
|
DnsNameResolver resolver,
|
|
Map<String, Future<AddressedEnvelope<DnsResponse, InetSocketAddress>>> futures,
|
|
String hostname) throws Exception {
|
|
futures.put(hostname, resolver.query(new DefaultDnsQuestion(hostname, DnsRecordType.MX)));
|
|
}
|
|
|
|
private static void assertNoQueriesMade(DnsNameResolver resolver) {
|
|
TestRecursiveCacheDnsQueryLifecycleObserverFactory lifecycleObserverFactory =
|
|
(TestRecursiveCacheDnsQueryLifecycleObserverFactory) resolver.dnsQueryLifecycleObserverFactory();
|
|
assertTrue(lifecycleObserverFactory.observers.isEmpty());
|
|
}
|
|
|
|
private static void assertQueryObserver(DnsNameResolver resolver, DnsRecordType cancelledType) {
|
|
TestRecursiveCacheDnsQueryLifecycleObserverFactory lifecycleObserverFactory =
|
|
(TestRecursiveCacheDnsQueryLifecycleObserverFactory) resolver.dnsQueryLifecycleObserverFactory();
|
|
TestDnsQueryLifecycleObserver observer;
|
|
while ((observer = lifecycleObserverFactory.observers.poll()) != null) {
|
|
Object o = observer.events.poll();
|
|
if (o instanceof QueryCancelledEvent) {
|
|
assertEquals(cancelledType, observer.question.type());
|
|
} else if (o instanceof QueryWrittenEvent) {
|
|
QuerySucceededEvent succeededEvent = (QuerySucceededEvent) observer.events.poll();
|
|
} else {
|
|
fail("unexpected event type: " + o);
|
|
}
|
|
assertTrue(observer.events.isEmpty());
|
|
}
|
|
}
|
|
|
|
private static final class TestRecursiveCacheDnsQueryLifecycleObserverFactory
|
|
implements DnsQueryLifecycleObserverFactory {
|
|
final Queue<TestDnsQueryLifecycleObserver> observers =
|
|
new ConcurrentLinkedQueue<TestDnsQueryLifecycleObserver>();
|
|
@Override
|
|
public DnsQueryLifecycleObserver newDnsQueryLifecycleObserver(DnsQuestion question) {
|
|
TestDnsQueryLifecycleObserver observer = new TestDnsQueryLifecycleObserver(question);
|
|
observers.add(observer);
|
|
return observer;
|
|
}
|
|
}
|
|
|
|
private static final class QueryWrittenEvent {
|
|
final InetSocketAddress dnsServerAddress;
|
|
|
|
QueryWrittenEvent(InetSocketAddress dnsServerAddress) {
|
|
this.dnsServerAddress = dnsServerAddress;
|
|
}
|
|
}
|
|
|
|
private static final class QueryCancelledEvent {
|
|
final int queriesRemaining;
|
|
|
|
QueryCancelledEvent(int queriesRemaining) {
|
|
this.queriesRemaining = queriesRemaining;
|
|
}
|
|
}
|
|
|
|
private static final class QueryRedirectedEvent {
|
|
final List<InetSocketAddress> nameServers;
|
|
|
|
QueryRedirectedEvent(List<InetSocketAddress> nameServers) {
|
|
this.nameServers = nameServers;
|
|
}
|
|
}
|
|
|
|
private static final class QueryCnamedEvent {
|
|
final DnsQuestion question;
|
|
|
|
QueryCnamedEvent(DnsQuestion question) {
|
|
this.question = question;
|
|
}
|
|
}
|
|
|
|
private static final class QueryNoAnswerEvent {
|
|
final DnsResponseCode code;
|
|
|
|
QueryNoAnswerEvent(DnsResponseCode code) {
|
|
this.code = code;
|
|
}
|
|
}
|
|
|
|
private static final class QueryFailedEvent {
|
|
final Throwable cause;
|
|
|
|
QueryFailedEvent(Throwable cause) {
|
|
this.cause = cause;
|
|
}
|
|
}
|
|
|
|
private static final class QuerySucceededEvent {
|
|
}
|
|
|
|
private static final class TestDnsQueryLifecycleObserver implements DnsQueryLifecycleObserver {
|
|
final Queue<Object> events = new ArrayDeque<Object>();
|
|
final DnsQuestion question;
|
|
|
|
TestDnsQueryLifecycleObserver(DnsQuestion question) {
|
|
this.question = question;
|
|
}
|
|
|
|
@Override
|
|
public void queryWritten(InetSocketAddress dnsServerAddress, ChannelFuture future) {
|
|
events.add(new QueryWrittenEvent(dnsServerAddress));
|
|
}
|
|
|
|
@Override
|
|
public void queryCancelled(int queriesRemaining) {
|
|
events.add(new QueryCancelledEvent(queriesRemaining));
|
|
}
|
|
|
|
@Override
|
|
public DnsQueryLifecycleObserver queryRedirected(List<InetSocketAddress> nameServers) {
|
|
events.add(new QueryRedirectedEvent(nameServers));
|
|
return this;
|
|
}
|
|
|
|
@Override
|
|
public DnsQueryLifecycleObserver queryCNAMEd(DnsQuestion cnameQuestion) {
|
|
events.add(new QueryCnamedEvent(cnameQuestion));
|
|
return this;
|
|
}
|
|
|
|
@Override
|
|
public DnsQueryLifecycleObserver queryNoAnswer(DnsResponseCode code) {
|
|
events.add(new QueryNoAnswerEvent(code));
|
|
return this;
|
|
}
|
|
|
|
@Override
|
|
public void queryFailed(Throwable cause) {
|
|
events.add(new QueryFailedEvent(cause));
|
|
}
|
|
|
|
@Override
|
|
public void querySucceed() {
|
|
events.add(new QuerySucceededEvent());
|
|
}
|
|
}
|
|
|
|
private static final class TestDnsCache implements DnsCache {
|
|
private final DnsCache cache;
|
|
final Map<String, List<? extends DnsCacheEntry>> cacheHits = new HashMap<String,
|
|
List<? extends DnsCacheEntry>>();
|
|
|
|
TestDnsCache(DnsCache cache) {
|
|
this.cache = cache;
|
|
}
|
|
|
|
@Override
|
|
public void clear() {
|
|
cache.clear();
|
|
}
|
|
|
|
@Override
|
|
public boolean clear(String hostname) {
|
|
return cache.clear(hostname);
|
|
}
|
|
|
|
@Override
|
|
public List<? extends DnsCacheEntry> get(String hostname, DnsRecord[] additionals) {
|
|
List<? extends DnsCacheEntry> cacheEntries = cache.get(hostname, additionals);
|
|
cacheHits.put(hostname, cacheEntries);
|
|
return cacheEntries;
|
|
}
|
|
|
|
@Override
|
|
public DnsCacheEntry cache(
|
|
String hostname, DnsRecord[] additionals, InetAddress address, long originalTtl, EventLoop loop) {
|
|
return cache.cache(hostname, additionals, address, originalTtl, loop);
|
|
}
|
|
|
|
@Override
|
|
public DnsCacheEntry cache(
|
|
String hostname, DnsRecord[] additionals, Throwable cause, EventLoop loop) {
|
|
return cache.cache(hostname, additionals, cause, loop);
|
|
}
|
|
}
|
|
|
|
private static class RedirectingTestDnsServer extends TestDnsServer {
|
|
|
|
private final String dnsAddress;
|
|
private final String domain;
|
|
|
|
RedirectingTestDnsServer(String domain, String dnsAddress) {
|
|
super(Collections.singleton(domain));
|
|
this.domain = domain;
|
|
this.dnsAddress = dnsAddress;
|
|
}
|
|
|
|
@Override
|
|
protected DnsMessage filterMessage(DnsMessage message) {
|
|
// Clear the answers as we want to add our own stuff to test dns redirects.
|
|
message.getAnswerRecords().clear();
|
|
|
|
String name = domain;
|
|
for (int i = 0 ;; i++) {
|
|
int idx = name.indexOf('.');
|
|
if (idx <= 0) {
|
|
break;
|
|
}
|
|
name = name.substring(idx + 1); // skip the '.' as well.
|
|
String dnsName = "dns" + idx + '.' + domain;
|
|
message.getAuthorityRecords().add(newNsRecord(name, dnsName));
|
|
message.getAdditionalRecords().add(newARecord(dnsName, i == 0 ? dnsAddress : "1.2.3." + idx));
|
|
}
|
|
|
|
return message;
|
|
}
|
|
|
|
private static ResourceRecord newARecord(String dnsname, String ipAddress) {
|
|
ResourceRecordModifier rm = new ResourceRecordModifier();
|
|
rm.setDnsClass(RecordClass.IN);
|
|
rm.setDnsName(dnsname);
|
|
rm.setDnsTtl(100);
|
|
rm.setDnsType(RecordType.A);
|
|
rm.put(DnsAttribute.IP_ADDRESS, ipAddress);
|
|
return rm.getEntry();
|
|
}
|
|
|
|
private static ResourceRecord newNsRecord(String dnsname, String domainName) {
|
|
ResourceRecordModifier rm = new ResourceRecordModifier();
|
|
rm.setDnsClass(RecordClass.IN);
|
|
rm.setDnsName(dnsname);
|
|
rm.setDnsTtl(100);
|
|
rm.setDnsType(RecordType.NS);
|
|
rm.put(DnsAttribute.DOMAIN_NAME, domainName);
|
|
return rm.getEntry();
|
|
}
|
|
}
|
|
|
|
@Test(timeout = 3000)
|
|
public void testTimeoutNotCached() {
|
|
DnsCache cache = new DnsCache() {
|
|
@Override
|
|
public void clear() {
|
|
// NOOP
|
|
}
|
|
|
|
@Override
|
|
public boolean clear(String hostname) {
|
|
return false;
|
|
}
|
|
|
|
@Override
|
|
public List<? extends DnsCacheEntry> get(String hostname, DnsRecord[] additionals) {
|
|
return Collections.emptyList();
|
|
}
|
|
|
|
@Override
|
|
public DnsCacheEntry cache(String hostname, DnsRecord[] additionals, InetAddress address,
|
|
long originalTtl, EventLoop loop) {
|
|
fail("Should not be cached");
|
|
return null;
|
|
}
|
|
|
|
@Override
|
|
public DnsCacheEntry cache(String hostname, DnsRecord[] additionals, Throwable cause, EventLoop loop) {
|
|
fail("Should not be cached");
|
|
return null;
|
|
}
|
|
};
|
|
DnsNameResolverBuilder builder = newResolver();
|
|
builder.queryTimeoutMillis(100)
|
|
.authoritativeDnsServerCache(cache)
|
|
.resolveCache(cache)
|
|
.nameServerProvider(new SingletonDnsServerAddressStreamProvider(
|
|
new InetSocketAddress(NetUtil.LOCALHOST, 12345)));
|
|
DnsNameResolver resolver = builder.build();
|
|
Future<InetAddress> result = resolver.resolve("doesnotexist.netty.io").awaitUninterruptibly();
|
|
Throwable cause = result.cause();
|
|
assertTrue(cause instanceof UnknownHostException);
|
|
assertTrue(cause.getCause() instanceof DnsNameResolverTimeoutException);
|
|
assertTrue(DnsNameResolver.isTimeoutError(cause));
|
|
assertTrue(DnsNameResolver.isTransportOrTimeoutError(cause));
|
|
resolver.close();
|
|
}
|
|
|
|
@Test
|
|
public void testDnsNameResolverBuilderCopy() {
|
|
ChannelFactory<DatagramChannel> channelFactory =
|
|
new ReflectiveChannelFactory<DatagramChannel>(NioDatagramChannel.class);
|
|
DnsNameResolverBuilder builder = new DnsNameResolverBuilder(group.next())
|
|
.channelFactory(channelFactory);
|
|
DnsNameResolverBuilder copiedBuilder = builder.copy();
|
|
|
|
// change channel factory does not propagate to previously made copy
|
|
ChannelFactory<DatagramChannel> newChannelFactory =
|
|
new ReflectiveChannelFactory<DatagramChannel>(NioDatagramChannel.class);
|
|
builder.channelFactory(newChannelFactory);
|
|
assertEquals(channelFactory, copiedBuilder.channelFactory());
|
|
assertEquals(newChannelFactory, builder.channelFactory());
|
|
}
|
|
}
|