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1   /*
2    * Copyright 2019 The Netty Project
3    *
4    * The Netty Project licenses this file to you under the Apache License,
5    * version 2.0 (the "License"); you may not use this file except in compliance
6    * with the License. You may obtain a copy of the License at:
7    *
8    *   https://www.apache.org/licenses/LICENSE-2.0
9    *
10   * Unless required by applicable law or agreed to in writing, software
11   * distributed under the License is distributed on an "AS IS" BASIS, WITHOUT
12   * WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. See the
13   * License for the specific language governing permissions and limitations
14   * under the License.
15   */
16  package io.netty.resolver.dns;
17  
18  import io.netty.bootstrap.Bootstrap;
19  import io.netty.channel.AddressedEnvelope;
20  import io.netty.channel.Channel;
21  import io.netty.channel.ChannelFuture;
22  import io.netty.handler.codec.dns.DatagramDnsQuery;
23  import io.netty.handler.codec.dns.DnsQuery;
24  import io.netty.handler.codec.dns.DnsQuestion;
25  import io.netty.handler.codec.dns.DnsRecord;
26  import io.netty.handler.codec.dns.DnsResponse;
27  import io.netty.util.concurrent.Future;
28  import io.netty.util.concurrent.Promise;
29  
30  import java.net.InetSocketAddress;
31  
32  final class DatagramDnsQueryContext extends DnsQueryContext {
33  
34      DatagramDnsQueryContext(Channel channel,
35                              InetSocketAddress nameServerAddr,
36                              DnsQueryContextManager queryContextManager,
37                              int maxPayLoadSize, boolean recursionDesired,
38                              long queryTimeoutMillis,
39                              DnsQuestion question, DnsRecord[] additionals,
40                              Promise<AddressedEnvelope<DnsResponse, InetSocketAddress>> promise,
41                              Bootstrap socketBootstrap, boolean retryWithTcpOnTimeout) {
42          super(channel, nameServerAddr, queryContextManager, maxPayLoadSize, recursionDesired,
43                  queryTimeoutMillis, question, additionals, promise, socketBootstrap, retryWithTcpOnTimeout);
44      }
45  
46      @Override
47      protected DnsQuery newQuery(int id, InetSocketAddress nameServerAddr) {
48          return new DatagramDnsQuery(null, nameServerAddr, id);
49      }
50  
51      @Override
52      protected String protocol() {
53          return "UDP";
54      }
55  }