@Override
  protected Packet getWholePacket() throws UnknownHostException {
    IcmpV4CommonPacket.Builder icmpV4b = new IcmpV4CommonPacket.Builder();
    icmpV4b
        .type(IcmpV4Type.PARAMETER_PROBLEM)
        .code(IcmpV4Code.POINTER_INDICATES_ERROR)
        .payloadBuilder(new SimpleBuilder(packet))
        .correctChecksumAtBuild(true);

    IpV4Packet.Builder ipv4b = new IpV4Packet.Builder();
    ipv4b
        .version(IpVersion.IPV4)
        .tos(IpV4Rfc1349Tos.newInstance((byte) 0))
        .identification((short) 100)
        .ttl((byte) 100)
        .protocol(IpNumber.ICMPV4)
        .srcAddr(
            (Inet4Address)
                InetAddress.getByAddress(new byte[] {(byte) 192, (byte) 0, (byte) 2, (byte) 1}))
        .dstAddr(
            (Inet4Address)
                InetAddress.getByAddress(new byte[] {(byte) 192, (byte) 0, (byte) 2, (byte) 2}))
        .payloadBuilder(icmpV4b)
        .correctChecksumAtBuild(true)
        .correctLengthAtBuild(true);

    EthernetPacket.Builder eb = new EthernetPacket.Builder();
    eb.dstAddr(MacAddress.getByName("fe:00:00:00:00:02"))
        .srcAddr(MacAddress.getByName("fe:00:00:00:00:01"))
        .type(EtherType.IPV4)
        .payloadBuilder(ipv4b)
        .paddingAtBuild(true);
    return eb.build();
  }
  public IcmpV4ParameterProblemPacketTest() {
    this.pointer = (byte) 123;
    this.unused = 321;

    IcmpV4EchoPacket.Builder echob = new IcmpV4EchoPacket.Builder();
    echob
        .identifier((short) 100)
        .sequenceNumber((short) 10)
        .payloadBuilder(
            new UnknownPacket.Builder().rawData((new byte[] {(byte) 0, (byte) 1, (byte) 2})));

    IcmpV4CommonPacket.Builder icmpV4b = new IcmpV4CommonPacket.Builder();
    icmpV4b
        .type(IcmpV4Type.ECHO)
        .code(IcmpV4Code.NO_CODE)
        .payloadBuilder(echob)
        .correctChecksumAtBuild(true);

    IpV4Packet.Builder ipv4b = new IpV4Packet.Builder();
    try {
      ipv4b
          .version(IpVersion.IPV4)
          .tos(IpV4Rfc1349Tos.newInstance((byte) 0))
          .identification((short) 100)
          .ttl((byte) 100)
          .protocol(IpNumber.ICMPV4)
          .srcAddr(
              (Inet4Address)
                  InetAddress.getByAddress(new byte[] {(byte) 192, (byte) 0, (byte) 2, (byte) 2}))
          .dstAddr(
              (Inet4Address)
                  InetAddress.getByAddress(new byte[] {(byte) 192, (byte) 0, (byte) 2, (byte) 1}))
          .payloadBuilder(icmpV4b)
          .correctChecksumAtBuild(true)
          .correctLengthAtBuild(true);
    } catch (UnknownHostException e) {
      throw new AssertionError();
    }

    IcmpV4ParameterProblemPacket.Builder b = new IcmpV4ParameterProblemPacket.Builder();
    b.pointer(pointer)
        .unused(unused)
        .payload(IcmpV4Helper.makePacketForInvokingPacketField(ipv4b.build()));
    this.packet = b.build();
  }