DhcpTest.java
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/*
* Copyright 2015 Open Networking Laboratory
*
* Licensed 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 org.onlab.packet;
import com.google.common.base.Charsets;
import org.junit.Before;
import org.junit.Test;
import java.nio.ByteBuffer;
import java.util.Arrays;
import static org.junit.Assert.assertEquals;
import static org.junit.Assert.assertTrue;
/**
* Unit tests for DHCP class.
*/
public class DhcpTest {
private Deserializer<DHCP> deserializer = DHCP.deserializer();
private byte opCode = 1;
private byte hardwareType = 1;
private byte hardwareAddressLength = Ethernet.DATALAYER_ADDRESS_LENGTH;
private byte hops = 0;
private int transactionId = 0x2ed4eb50;
private short seconds = 0;
private short flags = 0;
private int clientIpAddress = 1;
private int yourIpAddress = 2;
private int serverIpAddress = 3;
private int gatewayIpAddress = 4;
private byte[] clientHardwareAddress = MacAddress.valueOf(500).toBytes();
private String serverName = "test-server";
private String bootFileName = "test-file";
private String hostName = "test-host";
private DHCPOption hostNameOption = new DHCPOption();
private byte[] byteHeader;
@Before
public void setUp() {
hostNameOption.setCode((byte) 55);
hostNameOption.setLength((byte) hostName.length());
hostNameOption.setData(hostName.getBytes(Charsets.US_ASCII));
// Packet length is the fixed DHCP header plus option length plus an
// extra byte to indicate 'end of options'.
ByteBuffer bb = ByteBuffer.allocate(DHCP.MIN_HEADER_LENGTH +
2 + hostNameOption.getLength() + 1);
bb.put(opCode);
bb.put(hardwareType);
bb.put(hardwareAddressLength);
bb.put(hops);
bb.putInt(transactionId);
bb.putShort(seconds);
bb.putShort(flags);
bb.putInt(clientIpAddress);
bb.putInt(yourIpAddress);
bb.putInt(serverIpAddress);
bb.putInt(gatewayIpAddress);
bb.put(clientHardwareAddress);
// need 16 bytes of zeros to pad out the client hardware address field
bb.put(new byte[16 - hardwareAddressLength]);
// Put server name and pad out to 64 bytes
bb.put(serverName.getBytes(Charsets.US_ASCII));
bb.put(new byte[64 - serverName.length()]);
// Put boot file name and pad out to 128 bytes
bb.put(bootFileName.getBytes(Charsets.US_ASCII));
bb.put(new byte[128 - bootFileName.length()]);
// Magic cookie
bb.put("DHCP".getBytes(Charsets.US_ASCII));
bb.put(hostNameOption.getCode());
bb.put(hostNameOption.getLength());
bb.put(hostNameOption.getData());
// End of options marker
bb.put((byte) (0xff & 255));
byteHeader = bb.array();
}
@Test
public void testDeserializeBadInput() throws Exception {
PacketTestUtils.testDeserializeBadInput(deserializer);
}
@Test
public void testDeserializeTruncated() throws Exception {
PacketTestUtils.testDeserializeTruncated(deserializer, byteHeader);
}
@Test
public void testDeserialize() throws Exception {
DHCP dhcp = deserializer.deserialize(byteHeader, 0, byteHeader.length);
assertEquals(opCode, dhcp.opCode);
assertEquals(hardwareType, dhcp.hardwareType);
assertEquals(hardwareAddressLength, dhcp.hardwareAddressLength);
assertEquals(hops, dhcp.hops);
assertEquals(transactionId, dhcp.transactionId);
assertEquals(seconds, dhcp.seconds);
assertEquals(flags, dhcp.flags);
assertEquals(clientIpAddress, dhcp.clientIPAddress);
assertEquals(yourIpAddress, dhcp.yourIPAddress);
assertEquals(serverIpAddress, dhcp.serverIPAddress);
assertEquals(gatewayIpAddress, dhcp.gatewayIPAddress);
assertTrue(Arrays.equals(clientHardwareAddress, dhcp.clientHardwareAddress));
assertEquals(serverName, dhcp.serverName);
assertEquals(bootFileName, dhcp.bootFileName);
assertEquals(1, dhcp.options.size());
assertEquals(hostNameOption, dhcp.options.get(0));
}
}