b3b04d0de2
Motivation: DnsNameResolver manages search domains and will retry the request with the different search domains provided to it. However if the query results in an invalid hostname, the Future corresponding to the resolve request will never be completed. Modifications: - If a resolve attempt results in an invalid hostname and the query isn't issued we should fail the associated promise Result: No more hang from DnsNameResolver if search domain results in invalid hostname.
1716 lines
69 KiB
Java
1716 lines
69 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.Rule;
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import org.junit.Test;
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import org.junit.rules.ExpectedException;
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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.Collections;
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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.LinkedHashSet;
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import java.util.List;
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import java.util.Locale;
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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.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 java.util.Collections.singletonList;
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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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@Rule
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public ExpectedException expectedException = ExpectedException.none();
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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) {
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switch (question.getRecordType()) {
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case A:
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Map<String, Object> attr = new HashMap<String, Object>();
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attr.put(DnsAttribute.IP_ADDRESS.toLowerCase(Locale.US), overriddenIP);
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return Collections.<ResourceRecord>singleton(
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new TestDnsServer.TestResourceRecord(
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question.getDomainName(), question.getRecordType(), attr));
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default:
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return null;
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}
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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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}
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} finally {
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resolver.close();
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}
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} finally {
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dnsServer2.stop();
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}
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}
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@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
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.ttl(Integer.MAX_VALUE, Integer.MAX_VALUE)
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.build();
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try {
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final Map<String, InetAddress> resultA = testResolve0(resolver, EXCLUSIONS_RESOLVE_A, null);
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// Now, try to resolve again to see if it's cached.
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// This test works because the DNS servers usually randomizes the order of the records in a response.
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// If cached, the resolved addresses must be always same, because we reuse the same response.
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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.
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assertThat(resultB.size(), is(resultA.size()));
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for (Entry<String, InetAddress> e: resultA.entrySet()) {
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InetAddress expected = e.getValue();
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InetAddress actual = resultB.get(e.getKey());
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if (!actual.equals(expected)) {
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// Print the content of the cache when test failure is expected.
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System.err.println("Cache for " + e.getKey() + ": " + resolver.resolveAll(e.getKey()).getNow());
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}
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assertThat(actual, is(expected));
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}
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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 testResolveAAAA() throws Exception {
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DnsNameResolver resolver = newResolver(ResolvedAddressTypes.IPV6_ONLY).build();
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try {
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testResolve0(resolver, EXCLUSIONS_RESOLVE_AAAA, null);
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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 testNonCachedResolve() throws Exception {
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|
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);
|
|
}
|
|
|
|
private static 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() {
|
|
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 {
|
|
testCNAMERecursiveResolve(true);
|
|
}
|
|
|
|
@Test
|
|
public void testCNAMEResolveAllIpv6() throws IOException {
|
|
testCNAMERecursiveResolve(false);
|
|
}
|
|
|
|
private static void testCNAMERecursiveResolve(boolean ipv4Preferred) throws IOException {
|
|
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) {
|
|
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(Collections.singleton("notnetty.com"));
|
|
final TestDnsServer dnsServer2 = new TestDnsServer(Collections.singleton(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(Collections.singleton("notnetty.com"));
|
|
final TestDnsServer dnsServer2 = new TestDnsServer(Collections.singleton(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) {
|
|
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());
|
|
}
|
|
|
|
@Test
|
|
public void testFollowCNAMEEvenIfARecordIsPresent() throws IOException {
|
|
TestDnsServer dnsServer2 = new TestDnsServer(new RecordStore() {
|
|
|
|
@Override
|
|
public Set<ResourceRecord> getRecords(QuestionRecord question) {
|
|
if (question.getDomainName().equals("cname.netty.io")) {
|
|
Map<String, Object> map1 = new HashMap<String, Object>();
|
|
map1.put(DnsAttribute.IP_ADDRESS.toLowerCase(), "10.0.0.99");
|
|
return Collections.<ResourceRecord>singleton(
|
|
new TestDnsServer.TestResourceRecord(question.getDomainName(), RecordType.A, map1));
|
|
} else {
|
|
Set<ResourceRecord> records = new LinkedHashSet<ResourceRecord>(2);
|
|
Map<String, Object> map = new HashMap<String, Object>();
|
|
map.put(DnsAttribute.DOMAIN_NAME.toLowerCase(), "cname.netty.io");
|
|
records.add(new TestDnsServer.TestResourceRecord(
|
|
question.getDomainName(), RecordType.CNAME, map));
|
|
|
|
Map<String, Object> map1 = new HashMap<String, Object>();
|
|
map1.put(DnsAttribute.IP_ADDRESS.toLowerCase(), "10.0.0.2");
|
|
records.add(new TestDnsServer.TestResourceRecord(
|
|
question.getDomainName(), RecordType.A, map1));
|
|
return records;
|
|
}
|
|
}
|
|
});
|
|
dnsServer2.start();
|
|
DnsNameResolver resolver = null;
|
|
try {
|
|
DnsNameResolverBuilder builder = newResolver()
|
|
.recursionDesired(true)
|
|
.resolvedAddressTypes(ResolvedAddressTypes.IPV4_ONLY)
|
|
.maxQueriesPerResolve(16)
|
|
.nameServerProvider(new SingletonDnsServerAddressStreamProvider(dnsServer2.localAddress()));
|
|
|
|
resolver = builder.build();
|
|
List<InetAddress> resolvedAddresses =
|
|
resolver.resolveAll("somehost.netty.io").syncUninterruptibly().getNow();
|
|
assertEquals(2, resolvedAddresses.size());
|
|
assertTrue(resolvedAddresses.contains(InetAddress.getByAddress(new byte[] { 10, 0, 0, 99 })));
|
|
assertTrue(resolvedAddresses.contains(InetAddress.getByAddress(new byte[] { 10, 0, 0, 2 })));
|
|
} finally {
|
|
dnsServer2.stop();
|
|
if (resolver != null) {
|
|
resolver.close();
|
|
}
|
|
}
|
|
}
|
|
|
|
@Test
|
|
public void testSearchDomainQueryFailureForSingleAddressTypeCompletes() {
|
|
expectedException.expect(UnknownHostException.class);
|
|
testSearchDomainQueryFailureCompletes(ResolvedAddressTypes.IPV4_ONLY);
|
|
}
|
|
|
|
@Test
|
|
public void testSearchDomainQueryFailureForMultipleAddressTypeCompletes() {
|
|
expectedException.expect(UnknownHostException.class);
|
|
testSearchDomainQueryFailureCompletes(ResolvedAddressTypes.IPV4_PREFERRED);
|
|
}
|
|
|
|
private void testSearchDomainQueryFailureCompletes(ResolvedAddressTypes types) {
|
|
DnsNameResolver resolver = newResolver()
|
|
.resolvedAddressTypes(types)
|
|
.ndots(1)
|
|
.searchDomains(singletonList(".")).build();
|
|
try {
|
|
resolver.resolve("invalid.com").syncUninterruptibly();
|
|
} finally {
|
|
resolver.close();
|
|
}
|
|
}
|
|
}
|