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/*******************************************************************************
* Copyright (c) 2014 Ericsson
*
* All rights reserved. This program and the accompanying materials are
* made available under the terms of the Eclipse Public License v1.0 which
* accompanies this distribution, and is available at
* http://www.eclipse.org/legal/epl-v10.html
*
* Contributors:
* Vincent Perot - Initial API and implementation
*******************************************************************************/
package org.eclipse.linuxtools.pcap.core.tests.protocol.ipv4;
import static org.junit.Assert.assertEquals;
import static org.junit.Assert.assertFalse;
import static org.junit.Assert.assertTrue;
import static org.junit.Assert.fail;
import static org.junit.Assume.assumeTrue;
import java.io.IOException;
import java.nio.ByteBuffer;
import java.nio.ByteOrder;
import java.util.Arrays;
import java.util.LinkedHashMap;
import java.util.Map;
import org.eclipse.linuxtools.pcap.core.packet.BadPacketException;
import org.eclipse.linuxtools.pcap.core.protocol.Protocol;
import org.eclipse.linuxtools.pcap.core.protocol.ipv4.IPv4Endpoint;
import org.eclipse.linuxtools.pcap.core.protocol.ipv4.IPv4Packet;
import org.eclipse.linuxtools.pcap.core.tests.shared.PcapTestTrace;
import org.eclipse.linuxtools.pcap.core.trace.BadPcapFileException;
import org.eclipse.linuxtools.pcap.core.trace.PcapFile;
import org.junit.Before;
import org.junit.Test;
/**
* JUnit Class that tests the IPv4Packet class and its method.
*
* @author Vincent Perot
*/
public class IPv4PacketTest {
private static final Map<String, String> EXPECTED_FIELDS;
static {
EXPECTED_FIELDS = new LinkedHashMap<>();
EXPECTED_FIELDS.put("Version", "4");
EXPECTED_FIELDS.put("Header Length", "24 bytes");
EXPECTED_FIELDS.put("Differentiated Services Field", "0x26");
EXPECTED_FIELDS.put("Explicit Congestion Notification", "0x02");
EXPECTED_FIELDS.put("Total Length", "255 bytes");
EXPECTED_FIELDS.put("Identification", "0x0ff0");
EXPECTED_FIELDS.put("Don't Fragment Flag", "false");
EXPECTED_FIELDS.put("More Fragment Flag", "false");
EXPECTED_FIELDS.put("Fragment Offset", "-31");
EXPECTED_FIELDS.put("Time to live", "160");
EXPECTED_FIELDS.put("Protocol", "Unknown (254)");
EXPECTED_FIELDS.put("Checksum", "0x3344");
EXPECTED_FIELDS.put("Source IP Address", "192.168.1.0");
EXPECTED_FIELDS.put("Destination IP Address", "193.169.2.1");
EXPECTED_FIELDS.put("Options", "a2 56 a2 56");
}
private static final String EXPECTED_TOSTRING;
static {
StringBuilder sb = new StringBuilder();
sb.append("Internet Protocol Version 4, Source: 192.168.1.0, Destination: 193.169.2.1\n");
sb.append("Version: 4, Identification: 0x0ff0, Header Length: 24 bytes, Total Length: 255 bytes\n");
sb.append("Differentiated Services Code Point: 0x26; Explicit Congestion Notification: 0x02\n");
sb.append("Flags: 0x00 (Don't have more fragments), Fragment Offset: -31\n");
sb.append("Time to live: 160\n");
sb.append("Protocol: 254\n");
sb.append("Header Checksum: 0x3344\n");
sb.append("Payload: a6");
EXPECTED_TOSTRING = sb.toString();
}
private ByteBuffer fPacket;
/**
* Initialize the packet.
*/
@Before
public void initialize() {
fPacket = ByteBuffer.allocate(25);
fPacket.order(ByteOrder.BIG_ENDIAN);
// Version + IHL
fPacket.put((byte) 0x46);
// DSCP + ECN
fPacket.put((byte) 0x9A);
// Total length - this is randomly chosen so that we verify that the
// packet handles wrong total length.
fPacket.put((byte) 0x00);
fPacket.put((byte) 0xFF);
// Identification
fPacket.put((byte) 0x0F);
fPacket.put((byte) 0xF0);
// Flags + Fragment Offset
fPacket.put((byte) 0x1E);
fPacket.put((byte) 0xE1);
// Time to live
fPacket.put((byte) 0xA0);
// Protocol - Unknown
fPacket.put((byte) 0xFE);
// Header checksum - chosen randomly
fPacket.put((byte) 0x33);
fPacket.put((byte) 0x44);
// Source IP - 4 bytes
fPacket.put((byte) 192);
fPacket.put((byte) 168);
fPacket.put((byte) 1);
fPacket.put((byte) 0);
// Destination IP - 4 bytes
fPacket.put((byte) 193);
fPacket.put((byte) 169);
fPacket.put((byte) 2);
fPacket.put((byte) 1);
// Options - 4 bytes
fPacket.put((byte) 0xA2);
fPacket.put((byte) 0x56);
fPacket.put((byte) 0xA2);
fPacket.put((byte) 0x56);
// Payload - 1 byte
fPacket.put((byte) 0xA6);
fPacket.flip();
}
/**
* Test that verify the correctness of the IPv4Packet's methods.
* @throws BadPcapFileException
* Thrown when the file is erroneous. Fails the test.
* @throws IOException
* Thrown when an IO error occurs. Fails the test.
* @throws BadPacketException
* Thrown when a packet is erroneous. Fails the test.
*/
@Test
public void CompleteIPv4PacketTest() throws IOException, BadPcapFileException, BadPacketException {
PcapTestTrace trace = PcapTestTrace.MOSTLY_TCP;
assumeTrue(trace.exists());
String file = trace.getPath();
try (PcapFile dummy = new PcapFile(file)) {
ByteBuffer byteBuffer = fPacket;
if (byteBuffer == null) {
fail("CompleteIPv4PacketTest has failed!");
return;
}
IPv4Packet packet = new IPv4Packet(dummy, null, byteBuffer);
// Protocol Testing
assertEquals(Protocol.IPV4, packet.getProtocol());
assertTrue(packet.hasProtocol(Protocol.IPV4));
assertTrue(packet.hasProtocol(Protocol.UNKNOWN));
assertFalse(packet.hasProtocol(Protocol.TCP));
// Abstract methods Testing
assertTrue(packet.validate());
assertEquals(1910842322, packet.hashCode());
assertFalse(packet.equals(null));
assertEquals(new IPv4Packet(dummy, null, byteBuffer), packet);
assertEquals(EXPECTED_FIELDS, packet.getFields());
assertEquals(EXPECTED_TOSTRING, packet.toString());
assertEquals("Src: 192.168.1.0 , Dst: 193.169.2.1", packet.getLocalSummaryString());
assertEquals("192.168.1.0 > 193.169.2.1 Id=4080 Len=1", packet.getGlobalSummaryString());
assertEquals(new IPv4Endpoint(packet, true), packet.getSourceEndpoint());
assertEquals(new IPv4Endpoint(packet, false), packet.getDestinationEndpoint());
fPacket.position(24);
byte[] payload = new byte[1];
fPacket.get(payload);
assertEquals(ByteBuffer.wrap(payload), packet.getPayload());
// Packet-specific methods Testing
assertTrue(Arrays.equals(packet.getSourceIpAddress(), Arrays.copyOfRange(fPacket.array(), 12, 16)));
assertTrue(Arrays.equals(packet.getDestinationIpAddress(), Arrays.copyOfRange(fPacket.array(), 16, 20)));
assertTrue(Arrays.equals(packet.getOptions(), Arrays.copyOfRange(fPacket.array(), 20, 24)));
assertEquals(4, packet.getVersion());
assertEquals(24, packet.getHeaderLength());
assertEquals(0x26, packet.getDSCP());
assertEquals(0x02, packet.getExplicitCongestionNotification());
assertEquals(255, packet.getTotalLength());
assertEquals(0x0FF0, packet.getIdentification());
assertFalse(packet.getReservedFlag());
assertFalse(packet.getDontFragmentFlag());
assertFalse(packet.getHasMoreFragment());
assertEquals(-31, packet.getFragmentOffset());
assertEquals(160, packet.getTimeToLive());
assertEquals(0xFE, packet.getIpDatagramProtocol());
assertEquals(0x3344, packet.getHeaderChecksum());
}
}
}
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