@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; }