ipv4.headerLength = (byte) (versionByte & 0xf); ipv4.setVersion((byte) (versionByte >> 4 & 0xf)); ipv4.setDiffServ(bb.get()); ipv4.totalLength = bb.getShort(); ipv4.identification = bb.getShort();
ipReply.setSourceAddress(destAddress); ipReply.setTtl((byte) 64); ipReply.setDiffServ(ipRequest.getDiffServ()); ipReply.setChecksum((short) 0); ipReply.setProtocol(IPv4.PROTOCOL_ICMP);