icps

notes

Lan

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class Lan
  def initialize
    @thread = 30
    @width = 15
    @log_file = "log"
    @lan = get_lan[1]
    @log = []
    @wait = 300
    @read_log_wait = 10
    puts "#{@lan}0/24"

    read_log.each_slice(@thread).each do |list|
      threads = [] ; line = []
      list.each do |ip|
        threads << Thread.new { line << error( ip) }
      end
      threads.each { |t| t.join }
      display(line, list)
      line.map{|p,ip| ip if p == " ■"}.compact.each{|ip| @log << ip } if not File.exist? @log_file
    end
    @log.each{|l| `echo #{l} >> #{@log_file}`} if not File.exist? @log_file
    puts
  end

  def get_lan
    ip  = `ifconfig | grep cast`.split("\n").map{|i|i.scan(/\d+\.\d+\.\d+\.\d+/)[0]}
    lan = ip.map{|i|i.scan(/(\d*\.\d*\.\d*\.)\d*/).join}
  end

  def read_log
    begin
      @wait = @read_log_wait
      IO.binread(@log_file).split("\n")
    rescue
      (1..254).to_a.map{|i| "#{@lan}#{i}"}
    end
  end

  def error(ip)
    `fping #{ip} -t #{@wait}`.match("alive") == nil ? [" □", ip] :  [" ■", ip]
  end

  def display(line, ip)
    line = line.map{|p,ip|[p,ip.split(".")[3].to_i]}.sort_by{|p,ip|ip}.map{|p,ip|[p,ip.to_s.rjust(3,'000')]}
    ip.each_index do |i|
      print "#{line[i].join}"
      print "\n" if line[i][1].to_i % @width == 0
    end
  end
end
Lan.new