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