1 /*
2 * Copyright 2016 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.netty5.handler.codec.dns;
17
18 import io.netty5.util.internal.UnstableApi;
19
20 import java.net.InetAddress;
21
22 /**
23 * An ECS record as defined in <a href="https://tools.ietf.org/html/rfc7871#section-6">Client Subnet in DNS Queries</a>.
24 */
25 @UnstableApi
26 public interface DnsOptEcsRecord extends DnsOptPseudoRecord {
27
28 /**
29 * Returns the leftmost number of significant bits of ADDRESS to be used for the lookup.
30 */
31 int sourcePrefixLength();
32
33 /**
34 * Returns the leftmost number of significant bits of ADDRESS that the response covers.
35 * In queries, it MUST be 0.
36 */
37 int scopePrefixLength();
38
39 /**
40 * Returns the bytes of the {@link InetAddress} to use.
41 */
42 byte[] address();
43
44 @Override
45 DnsOptEcsRecord copy();
46 }