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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.udp;
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.Map;
import org.eclipse.linuxtools.pcap.core.packet.BadPacketException;
import org.eclipse.linuxtools.pcap.core.protocol.Protocol;
import org.eclipse.linuxtools.pcap.core.protocol.udp.UDPEndpoint;
import org.eclipse.linuxtools.pcap.core.protocol.udp.UDPPacket;
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;
import com.google.common.collect.ImmutableMap;
/**
* JUnit Class that tests the UDPPacket class and its method.
*
* @author Vincent Perot
*/
public class UDPPacketTest {
private static final Map<String, String> EXPECTED_FIELDS = ImmutableMap.of(
"Source Port", "18057",
"Destination Port", "39611",
"Length", "41452 bytes",
"Checksum", "0xfaaf"
);
private static final String EXPTECTED_TOSTRING;
static {
StringBuilder sb = new StringBuilder();
sb.append("User Datagram Protocol, Source Port: 18057, Destination Port: 39611, Length: 41452, Checksum: 64175\n");
sb.append("Payload: 99 88 77 66");
EXPTECTED_TOSTRING = sb.toString();
}
private ByteBuffer fPacket;
/**
* Initialize the packet.
*/
@Before
public void initialize() {
fPacket = ByteBuffer.allocate(12);
fPacket.order(ByteOrder.BIG_ENDIAN);
// Source Port
fPacket.put((byte) 0x46);
fPacket.put((byte) 0x89);
// Destination Port
fPacket.put((byte) 0x9A);
fPacket.put((byte) 0xBB);
// Total length - this is randomly chosen so that we verify that the
// packet handles wrong total length.
fPacket.put((byte) 0xA1);
fPacket.put((byte) 0xEC);
// Checksum
fPacket.put((byte) 0xFA);
fPacket.put((byte) 0xAF);
// Payload - 4 bytes
fPacket.put((byte) 0x99);
fPacket.put((byte) 0x88);
fPacket.put((byte) 0x77);
fPacket.put((byte) 0x66);
fPacket.flip();
}
/**
* Test that verify the correctness of the UDPPacket'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 CompleteUDPPacketTest() 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("CompleteUDPPacketTest has failed!");
return;
}
UDPPacket packet = new UDPPacket(dummy, null, byteBuffer);
// Protocol Testing
assertEquals(Protocol.UDP, packet.getProtocol());
assertTrue(packet.hasProtocol(Protocol.UDP));
assertTrue(packet.hasProtocol(Protocol.UNKNOWN));
assertFalse(packet.hasProtocol(Protocol.ETHERNET_II));
// Abstract methods Testing
assertTrue(packet.validate());
assertEquals(473000225, packet.hashCode());
assertFalse(packet.equals(null));
assertEquals(new UDPPacket(dummy, null, byteBuffer), packet);
assertEquals(EXPECTED_FIELDS, packet.getFields());
assertEquals(EXPTECTED_TOSTRING, packet.toString());
assertEquals("Src Port: 18057, Dst Port: 39611", packet.getLocalSummaryString());
assertEquals("Source Port: 18057, Destination Port: 39611", packet.getGlobalSummaryString());
assertEquals(new UDPEndpoint(packet, true), packet.getSourceEndpoint());
assertEquals(new UDPEndpoint(packet, false), packet.getDestinationEndpoint());
fPacket.position(8);
byte[] payload = new byte[4];
fPacket.get(payload);
assertEquals(ByteBuffer.wrap(payload), packet.getPayload());
// Packet-specific methods Testing
assertEquals(0x4689, packet.getSourcePort());
assertEquals(0x9ABB, packet.getDestinationPort());
assertEquals(0xA1EC, packet.getTotalLength());
assertEquals(0xFAAF, packet.getChecksum());
}
}
}
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