org.pcap4j.test.packet.EthernetPacketTest Maven / Gradle / Ivy

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Tests of Pcap4J packet classes.
There is a newer version: 2.0.0-alpha.6
/*_##########################################################################
  _##
  _##  Copyright (C) 2012 Pcap4J.org
  _##
  _##########################################################################
*/
package org.pcap4j.test.packet;

import static org.junit.jupiter.api.Assertions.assertArrayEquals;
import static org.junit.jupiter.api.Assertions.assertEquals;

import java.net.InetAddress;
import java.net.UnknownHostException;
import org.junit.jupiter.api.AfterAll;
import org.junit.jupiter.api.BeforeAll;
import org.junit.jupiter.api.Test;
import org.pcap4j.packet.ArpPacket.Builder;
import org.pcap4j.packet.EthernetPacket;
import org.pcap4j.packet.EthernetPacket.EthernetHeader;
import org.pcap4j.packet.IllegalRawDataException;
import org.pcap4j.packet.Packet;
import org.pcap4j.packet.namednumber.ArpHardwareType;
import org.pcap4j.packet.namednumber.ArpOperation;
import org.pcap4j.packet.namednumber.EtherType;
import org.pcap4j.util.ByteArrays;
import org.pcap4j.util.MacAddress;
import org.slf4j.Logger;
import org.slf4j.LoggerFactory;

@SuppressWarnings("javadoc")
public class EthernetPacketTest extends AbstractPacketTest {

  private static final Logger logger = LoggerFactory.getLogger(EthernetPacketTest.class);

  private final EthernetPacket packet;
  private final MacAddress dstAddr;
  private final MacAddress srcAddr;
  private final EtherType type;
  private final byte[] pad;

  public EthernetPacketTest() {
    this.dstAddr = MacAddress.ETHER_BROADCAST_ADDRESS;
    this.srcAddr = MacAddress.getByName("fe:00:00:00:00:01");
    this.type = EtherType.ARP;
    this.pad =
        new byte[] {
          (byte) 0, (byte) 1, (byte) 0, (byte) 1, (byte) 0, (byte) 1,
          (byte) 0, (byte) 1, (byte) 0, (byte) 1, (byte) 0, (byte) 1,
          (byte) 0, (byte) 1, (byte) 0, (byte) 1, (byte) 0, (byte) 1,
          (byte) 0, (byte) 1, (byte) 0, (byte) 1, (byte) 0, (byte) 1,
          (byte) 0, (byte) 1, (byte) 0, (byte) 1, (byte) 0, (byte) 1,
        };

    Builder ab = new Builder();
    try {
      ab.hardwareType(ArpHardwareType.ETHERNET)
          .protocolType(EtherType.IPV4)
          .hardwareAddrLength((byte) MacAddress.SIZE_IN_BYTES)
          .protocolAddrLength((byte) ByteArrays.INET4_ADDRESS_SIZE_IN_BYTES)
          .srcHardwareAddr(srcAddr)
          .dstHardwareAddr(dstAddr)
          .srcProtocolAddr(
              InetAddress.getByAddress(new byte[] {(byte) 192, (byte) 0, (byte) 2, (byte) 1}))
          .dstProtocolAddr(
              InetAddress.getByAddress(new byte[] {(byte) 192, (byte) 0, (byte) 2, (byte) 2}))
          .operation(ArpOperation.REQUEST);
    } catch (UnknownHostException e) {
      throw new AssertionError();
    }

    EthernetPacket.Builder eb = new EthernetPacket.Builder();
    eb.dstAddr(dstAddr)
        .srcAddr(srcAddr)
        .type(type)
        .payloadBuilder(ab)
        .pad(pad)
        .paddingAtBuild(false);
    this.packet = eb.build();
  }

  @Override
  protected Packet getPacket() {
    return packet;
  }

  @Override
  protected Packet getWholePacket() {
    return packet;
  }

  @BeforeAll
  public static void setUpBeforeClass() throws Exception {
    logger.info("########## " + EthernetPacketTest.class.getSimpleName() + " START ##########");
  }

  @AfterAll
  public static void tearDownAfterClass() throws Exception {}

  @Test
  public void testNewPacket() {
    try {
      EthernetPacket p =
          EthernetPacket.newPacket(packet.getRawData(), 0, packet.getRawData().length);
      assertEquals(packet, p);
    } catch (IllegalRawDataException e) {
      throw new AssertionError(e);
    }
  }

  @Test
  public void testNewPacketRandom() {
    RandomPacketTester.testClass(EthernetPacket.class, packet);
  }

  @Test
  public void testGetHeader() {
    EthernetHeader h = packet.getHeader();
    assertEquals(dstAddr, h.getDstAddr());
    assertEquals(srcAddr, h.getSrcAddr());
    assertEquals(type, h.getType());
    assertArrayEquals(pad, packet.getPad());
  }
}