public BOOTPHeader(int opcode, int transactionID, Inet4Address clientIPAddress, HardwareAddress clientHwAddress)
public BOOTPHeader(SocketBuffer skbuf)
  public BOOTPHeader(int opcode, int transactionID, Inet4Address clientIPAddress, HardwareAddress clientHwAddress)  {    this.opcode = opcode;    this.hwType = clientHwAddress.getType();    this.hopCount = 0;    this.transactionID = transactionID;    this.secondsElapsed = 0;    this.flags = 0;    this.clientIPAddress = clientIPAddress;    this.yourIPAddress = null;    this.serverIPAddress = null;    this.gatewayIPAddress = null;    this.clientHwAddress = clientHwAddress;/*    dns1IPAddress = null;    dns2IPAddress = null;*/  }