# File lib/network/protocol/telnetfilter.rb, line 354
  def send_naws
    return if !enabled?(NAWS, :us)
    ts = @pstack.query(:termsize)
    data = [ts[0]].pack('n') + [ts[1]].pack('n')
    data.gsub!(/#{IAC}/, IAC.chr + IAC.chr) # 255 needs to be doubled
    @pstack.conn.sendmsg(IAC.chr + SB.chr + NAWS.chr + data + IAC.chr + SE.chr)
  end