@Override
public IPacket deserialize(byte[] data, int offset, int length) throws PacketParsingException {
ByteBuffer bb = ByteBuffer.wrap(data, offset, length);
this.hardwareType = bb.getShort();
this.protocolType = bb.getShort();
this.hardwareAddressLength = bb.get();
this.protocolAddressLength = bb.get();
if (this.hardwareAddressLength != 6) {
String msg = "Incorrect ARP hardware address length: " + hardwareAddressLength;
throw new PacketParsingException(msg);
}
if (this.protocolAddressLength != 4) {
String msg = "Incorrect ARP protocol address length: " + protocolAddressLength;
throw new PacketParsingException(msg);
}
this.opCode = ArpOpcode.of(bb.getShort());
byte[] tmpMac = new byte[0xff & this.hardwareAddressLength];
byte[] tmpIp = new byte[0xff & this.protocolAddressLength];
bb.get(tmpMac, 0, this.hardwareAddressLength);
this.senderHardwareAddress = MacAddress.of(tmpMac);
bb.get(tmpIp, 0, this.protocolAddressLength);
this.senderProtocolAddress = IPv4Address.of(tmpIp);
bb.get(tmpMac, 0, this.hardwareAddressLength);
this.targetHardwareAddress = MacAddress.of(tmpMac);
bb.get(tmpIp, 0, this.protocolAddressLength);
this.targetProtocolAddress = IPv4Address.of(tmpIp);
return this;
}
