io.netty.handler.codec.dns.DnsMessage Maven / Gradle / Ivy
/*
* Copyright 2015 The Netty Project
*
* The Netty Project licenses this file to you under the Apache License,
* version 2.0 (the "License"); you may not use this file except in compliance
* with the License. You may obtain a copy of the License at:
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS, WITHOUT
* WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. See the
* License for the specific language governing permissions and limitations
* under the License.
*/
package io.netty.handler.codec.dns;
import io.netty.util.ReferenceCounted;
/**
* The superclass which contains core information concerning a {@link DnsQuery} and a {@link DnsResponse}.
*/
public interface DnsMessage extends ReferenceCounted {
/**
* Returns the {@code ID} of this DNS message.
*/
int id();
/**
* Sets the {@code ID} of this DNS message.
*/
DnsMessage setId(int id);
/**
* Returns the {@code opCode} of this DNS message.
*/
DnsOpCode opCode();
/**
* Sets the {@code opCode} of this DNS message.
*/
DnsMessage setOpCode(DnsOpCode opCode);
/**
* Returns the {@code RD} (recursion desired} field of this DNS message.
*/
boolean isRecursionDesired();
/**
* Sets the {@code RD} (recursion desired} field of this DNS message.
*/
DnsMessage setRecursionDesired(boolean recursionDesired);
/**
* Returns the {@code Z} (reserved for future use) field of this DNS message.
*/
int z();
/**
* Sets the {@code Z} (reserved for future use) field of this DNS message.
*/
DnsMessage setZ(int z);
/**
* Returns the number of records in the specified {@code section} of this DNS message.
*/
int count(DnsSection section);
/**
* Returns the number of records in this DNS message.
*/
int count();
/**
* Returns the first record in the specified {@code section} of this DNS message.
* When the specified {@code section} is {@link DnsSection#QUESTION}, the type of the returned record is
* always {@link DnsQuestion}.
*
* @return {@code null} if this message doesn't have any records in the specified {@code section}
*/
T recordAt(DnsSection section);
/**
* Returns the record at the specified {@code index} of the specified {@code section} of this DNS message.
* When the specified {@code section} is {@link DnsSection#QUESTION}, the type of the returned record is
* always {@link DnsQuestion}.
*
* @throws IndexOutOfBoundsException if the specified {@code index} is out of bounds
*/
T recordAt(DnsSection section, int index);
/**
* Sets the specified {@code section} of this DNS message to the specified {@code record},
* making it a single-record section. When the specified {@code section} is {@link DnsSection#QUESTION},
* the specified {@code record} must be a {@link DnsQuestion}.
*/
DnsMessage setRecord(DnsSection section, DnsRecord record);
/**
* Sets the specified {@code record} at the specified {@code index} of the specified {@code section}
* of this DNS message. When the specified {@code section} is {@link DnsSection#QUESTION},
* the specified {@code record} must be a {@link DnsQuestion}.
*
* @return the old record
* @throws IndexOutOfBoundsException if the specified {@code index} is out of bounds
*/
T setRecord(DnsSection section, int index, DnsRecord record);
/**
* Adds the specified {@code record} at the end of the specified {@code section} of this DNS message.
* When the specified {@code section} is {@link DnsSection#QUESTION}, the specified {@code record}
* must be a {@link DnsQuestion}.
*/
DnsMessage addRecord(DnsSection section, DnsRecord record);
/**
* Adds the specified {@code record} at the specified {@code index} of the specified {@code section}
* of this DNS message. When the specified {@code section} is {@link DnsSection#QUESTION}, the specified
* {@code record} must be a {@link DnsQuestion}.
*
* @throws IndexOutOfBoundsException if the specified {@code index} is out of bounds
*/
DnsMessage addRecord(DnsSection section, int index, DnsRecord record);
/**
* Removes the record at the specified {@code index} of the specified {@code section} from this DNS message.
* When the specified {@code section} is {@link DnsSection#QUESTION}, the type of the returned record is
* always {@link DnsQuestion}.
*
* @return the removed record
*/
T removeRecord(DnsSection section, int index);
/**
* Removes all the records in the specified {@code section} of this DNS message.
*/
DnsMessage clear(DnsSection section);
/**
* Removes all the records in this DNS message.
*/
DnsMessage clear();
@Override
DnsMessage retain();
@Override
DnsMessage retain(int increment);
}