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 io.netty.util.internal.UnstableApi;
19
20 /**
21 * An <a href="https://tools.ietf.org/html/rfc6891#section-6.1">OPT RR</a> record.
22 * <p>
23 * This is used for <a href="https://tools.ietf.org/html/rfc6891#section-6.1.3">Extension
24 * Mechanisms for DNS (EDNS(0))</a>.
25 */
26 @UnstableApi
27 public interface DnsOptPseudoRecord extends DnsRecord {
28
29 /**
30 * Returns the {@code EXTENDED-RCODE} which is encoded into {@link DnsOptPseudoRecord#timeToLive()}.
31 */
32 int extendedRcode();
33
34 /**
35 * Returns the {@code VERSION} which is encoded into {@link DnsOptPseudoRecord#timeToLive()}.
36 */
37 int version();
38
39 /**
40 * Returns the {@code flags} which includes {@code DO} and {@code Z} which is encoded
41 * into {@link DnsOptPseudoRecord#timeToLive()}.
42 */
43 int flags();
44 }