6d80c641e9
Motivation: If there are multiple DNS servers to query Java's DNS resolver will attempt to resolve A and AAAA records in sequential order and will terminate with a failure once all DNS servers have been exhausted. Netty's DNS server will share the same DnsServerAddressStream for the different record types which may send the A question to the first host and the AAAA question to the second host. Netty's DNS resolution also may not progress to the next DNS server in all situations and doesn't have a means to know when resolution has completed. Modifications: - DnsServerAddressStream should support new methods to allow the same stream to be used to issue multiple queries (e.g. A and AAAA) against the same host. - DnsServerAddressStream should support a method to determine when the stream will start to repeat, and therefore a failure can be returned. - Introduce SequentialDnsServerAddressStreamProvider for sequential use cases Result: Fixes https://github.com/netty/netty/issues/6926.
1246 lines
48 KiB
Java
1246 lines
48 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.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.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.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.store.DnsAttribute;
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import org.apache.directory.server.dns.store.RecordStore;
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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.Collections;
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import java.util.HashMap;
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import java.util.HashSet;
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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.TimeUnit;
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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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// 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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"facebook.com",
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"youtube.com",
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"yahoo.com",
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"baidu.com",
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"wikipedia.org",
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"amazon.com",
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"twitter.com",
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"qq.com",
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"taobao.com",
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"linkedin.com",
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"google.co.in",
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"live.com",
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"hao123.com",
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"sina.com.cn",
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"blogspot.com",
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"weibo.com",
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"yahoo.co.jp",
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"tmall.com",
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"yandex.ru",
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"sohu.com",
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"bing.com",
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"ebay.com",
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"pinterest.com",
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"vk.com",
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"google.de",
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"wordpress.com",
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"apple.com",
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"google.co.jp",
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"google.co.uk",
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"360.cn",
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"instagram.com",
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"google.fr",
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"msn.com",
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"ask.com",
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"soso.com",
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"google.com.br",
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"tumblr.com",
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"paypal.com",
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"mail.ru",
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"xvideos.com",
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"microsoft.com",
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"google.ru",
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"reddit.com",
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"google.it",
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"imgur.com",
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"163.com",
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"google.es",
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"imdb.com",
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"aliexpress.com",
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"t.co",
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"go.com",
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"adcash.com",
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"craigslist.org",
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"amazon.co.jp",
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"alibaba.com",
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"google.com.mx",
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"stackoverflow.com",
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"xhamster.com",
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"fc2.com",
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"google.ca",
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"bbc.co.uk",
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"espn.go.com",
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"cnn.com",
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"google.co.id",
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"people.com.cn",
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"gmw.cn",
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"pornhub.com",
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"blogger.com",
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"huffingtonpost.com",
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"flipkart.com",
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"akamaihd.net",
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"google.com.tr",
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"amazon.de",
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"netflix.com",
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"onclickads.net",
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"googleusercontent.com",
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"kickass.to",
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"google.com.au",
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"google.pl",
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"xinhuanet.com",
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"ebay.de",
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"wordpress.org",
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"odnoklassniki.ru",
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"google.com.hk",
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"adobe.com",
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"dailymotion.com",
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"dailymail.co.uk",
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"indiatimes.com",
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"amazon.co.uk",
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"xnxx.com",
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"rakuten.co.jp",
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"dropbox.com",
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"tudou.com",
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"about.com",
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"cnet.com",
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"vimeo.com",
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"redtube.com",
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"blogspot.in",
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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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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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}
|
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} finally {
|
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resolver.close();
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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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|
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final Map<String, InetAddress> resultB = testResolve0(resolver, EXCLUSIONS_RESOLVE_A, null);
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|
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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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|
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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();
|
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try {
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testResolve0(resolver, EXCLUSIONS_RESOLVE_A, null);
|
|
} finally {
|
|
resolver.close();
|
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}
|
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}
|
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|
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@Test(timeout = 5000)
|
|
public void testNonCachedResolveEmptyHostName() throws Exception {
|
|
testNonCachedResolveEmptyHostName("");
|
|
}
|
|
|
|
@Test(timeout = 5000)
|
|
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 = 5000)
|
|
public void testNonCachedResolveAllEmptyHostName() throws Exception {
|
|
testNonCachedResolveAllEmptyHostName("");
|
|
}
|
|
|
|
@Test(timeout = 5000)
|
|
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(DnsNameResolverContext.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(5000);
|
|
|
|
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 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 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 = 5000)
|
|
public void secondDnsServerShouldBeUsedBeforeCNAMEFirstServerNotStarted() throws IOException {
|
|
secondDnsServerShouldBeUsedBeforeCNAME(false);
|
|
}
|
|
|
|
@Test(timeout = 5000)
|
|
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);
|
|
|
|
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 = 5000)
|
|
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);
|
|
|
|
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);
|
|
}
|
|
|
|
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<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<DnsCacheEntry>> cacheHits = new HashMap<String, List<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<DnsCacheEntry> get(String hostname, DnsRecord[] additionals) {
|
|
List<DnsCacheEntry> cacheEntries = cache.get(hostname, additionals);
|
|
cacheHits.put(hostname, cacheEntries);
|
|
return cacheEntries;
|
|
}
|
|
|
|
@Override
|
|
public void cache(
|
|
String hostname, DnsRecord[] additionals, InetAddress address, long originalTtl, EventLoop loop) {
|
|
cache.cache(hostname, additionals, address, originalTtl, loop);
|
|
}
|
|
|
|
@Override
|
|
public void cache(
|
|
String hostname, DnsRecord[] additionals, Throwable cause, EventLoop loop) {
|
|
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();
|
|
}
|
|
}
|
|
}
|