/*
* Copyright 2013 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.buffer.ByteBuf;
import io.netty.buffer.Unpooled;
import io.netty.channel.embedded.EmbeddedChannel;
import io.netty.channel.socket.DatagramPacket;
import io.netty.handler.codec.CorruptedFrameException;
import org.junit.Assert;
import org.junit.Rule;
import org.junit.Test;
import org.junit.rules.ExpectedException;
import java.net.InetSocketAddress;
public class DnsResponseTest {
private static final byte[][] packets = {
{
0, 1, -127, -128, 0, 1, 0, 1, 0, 0, 0, 0, 3, 119, 119, 119, 7, 101, 120, 97, 109, 112, 108, 101, 3,
99, 111, 109, 0, 0, 1, 0, 1, -64, 12, 0, 1, 0, 1, 0, 0, 16, -113, 0, 4, -64, 0, 43, 10
},
{
0, 1, -127, -128, 0, 1, 0, 1, 0, 0, 0, 0, 3, 119, 119, 119, 7, 101, 120, 97, 109, 112, 108, 101, 3,
99, 111, 109, 0, 0, 28, 0, 1, -64, 12, 0, 28, 0, 1, 0, 0, 69, -8, 0, 16, 32, 1, 5, 0, 0, -120, 2,
0, 0, 0, 0, 0, 0, 0, 0, 16
},
{
0, 2, -127, -128, 0, 1, 0, 0, 0, 1, 0, 0, 3, 119, 119, 119, 7, 101, 120, 97, 109, 112, 108, 101, 3,
99, 111, 109, 0, 0, 15, 0, 1, -64, 16, 0, 6, 0, 1, 0, 0, 3, -43, 0, 45, 3, 115, 110, 115, 3, 100,
110, 115, 5, 105, 99, 97, 110, 110, 3, 111, 114, 103, 0, 3, 110, 111, 99, -64, 49, 119, -4, 39,
112, 0, 0, 28, 32, 0, 0, 14, 16, 0, 18, 117, 0, 0, 0, 14, 16
},
{
0, 3, -127, -128, 0, 1, 0, 1, 0, 0, 0, 0, 3, 119, 119, 119, 7, 101, 120, 97, 109, 112, 108, 101, 3,
99, 111, 109, 0, 0, 16, 0, 1, -64, 12, 0, 16, 0, 1, 0, 0, 84, 75, 0, 12, 11, 118, 61, 115, 112,
102, 49, 32, 45, 97, 108, 108
},
{
-105, 19, -127, 0, 0, 1, 0, 0, 0, 13, 0, 0, 2, 104, 112, 11, 116, 105, 109, 98, 111, 117, 100, 114,
101, 97, 117, 3, 111, 114, 103, 0, 0, 1, 0, 1, 0, 0, 2, 0, 1, 0, 7, -23, 0, 0, 20, 1, 68, 12, 82,
79, 79, 84, 45, 83, 69, 82, 86, 69, 82, 83, 3, 78, 69, 84, 0, 0, 0, 2, 0, 1, 0, 7, -23, 0, 0, 4, 1,
70, -64, 49, 0, 0, 2, 0, 1, 0, 7, -23, 0, 0, 4, 1, 69, -64, 49, 0, 0, 2, 0, 1, 0, 7, -23, 0, 0, 4,
1, 75, -64, 49, 0, 0, 2, 0, 1, 0, 7, -23, 0, 0, 4, 1, 67, -64, 49, 0, 0, 2, 0, 1, 0, 7, -23, 0, 0,
4, 1, 76, -64, 49, 0, 0, 2, 0, 1, 0, 7, -23, 0, 0, 4, 1, 71, -64, 49, 0, 0, 2, 0, 1, 0, 7, -23, 0,
0, 4, 1, 73, -64, 49, 0, 0, 2, 0, 1, 0, 7, -23, 0, 0, 4, 1, 66, -64, 49, 0, 0, 2, 0, 1, 0, 7, -23,
0, 0, 4, 1, 77, -64, 49, 0, 0, 2, 0, 1, 0, 7, -23, 0, 0, 4, 1, 65, -64, 49, 0, 0, 2, 0, 1, 0, 7,
-23, 0, 0, 4, 1, 72, -64, 49, 0, 0, 2, 0, 1, 0, 7, -23, 0, 0, 4, 1, 74, -64, 49
}
};
private static final byte[] malformedLoopPacket = {
0, 4, -127, -128, 0, 1, 0, 0, 0, 0, 0, 0, -64, 12, 0, 1, 0, 1
};
@Test
public void readResponseTest() throws Exception {
EmbeddedChannel embedder = new EmbeddedChannel(new DnsResponseDecoder());
for (byte[] p: packets) {
ByteBuf packet = embedder.alloc().buffer(512).writeBytes(p);
embedder.writeInbound(new DatagramPacket(packet, null, new InetSocketAddress(0)));
DnsResponse decoded = embedder.readInbound();
ByteBuf raw = Unpooled.wrappedBuffer(p);
Assert.assertEquals("Invalid id, expected: " + raw.getUnsignedShort(0) + ", actual: "
+ decoded.header().id(), raw.getUnsignedShort(0), decoded.header().id());
Assert.assertEquals("Invalid resource count, expected: " + raw.getUnsignedShort(4) + ", actual: "
+ decoded.questions().size(), raw.getUnsignedShort(4), decoded.questions().size());
Assert.assertEquals("Invalid resource count, expected: " + raw.getUnsignedShort(6) + ", actual: "
+ decoded.answers().size(), raw.getUnsignedShort(6), decoded.answers().size());
Assert.assertEquals("Invalid resource count, expected: " + raw.getUnsignedShort(8) + ", actual: "
+ decoded.authorityResources().size(), raw.getUnsignedShort(8), decoded.authorityResources()
.size());
Assert.assertEquals("Invalid resource count, expected: " + raw.getUnsignedShort(10) + ", actual: "
+ decoded.additionalResources().size(), raw.getUnsignedShort(10),
decoded.additionalResources().size());
decoded.release();
}
}
@Rule
public ExpectedException exception = ExpectedException.none();
@Test
public void readMalormedResponseTest() throws Exception {
EmbeddedChannel embedder = new EmbeddedChannel(new DnsResponseDecoder());
ByteBuf packet = embedder.alloc().buffer(512).writeBytes(malformedLoopPacket);
exception.expect(CorruptedFrameException.class);
embedder.writeInbound(new DatagramPacket(packet, null, new InetSocketAddress(0)));
}
}