# File lib/net/ping/icmp.rb, line 74
    def ping(host = @host)
      super(host)
      bool = false

      socket = Socket.new(
        Socket::PF_INET,
        Socket::SOCK_RAW,
        Socket::IPPROTO_ICMP
      )

      if @bind_host
        saddr = Socket.pack_sockaddr_in(@bind_port, @bind_host)
        socket.bind(saddr)
      end

      @seq = (@seq + 1) % 65536
      pstring = 'C2 n3 A' << @data_size.to_s
      timeout = @timeout

      checksum = 0
      msg = [ICMP_ECHO, ICMP_SUBCODE, checksum, @pid, @seq, @data].pack(pstring)

      checksum = checksum(msg)
      msg = [ICMP_ECHO, ICMP_SUBCODE, checksum, @pid, @seq, @data].pack(pstring)

      begin
        saddr = Socket.pack_sockaddr_in(0, host)
      rescue Exception
        socket.close unless socket.closed?
        return bool
      end

      start_time = Time.now

      socket.send(msg, 0, saddr) # Send the message

      begin
        Timeout.timeout(@timeout){
          while true
            io_array = select([socket], nil, nil, timeout)

            if io_array.nil? || io_array[0].empty?
              return false
            end

            pid = nil
            seq = nil

            data = socket.recvfrom(1500).first
            type = data[20, 2].unpack('C2').first

            case type
              when ICMP_ECHOREPLY
                if data.length >= 28
                  pid, seq = data[24, 4].unpack('n3')
                end
              else
                if data.length > 56
                  pid, seq = data[52, 4].unpack('n3')
                end
            end

            if pid == @pid && seq == @seq && type == ICMP_ECHOREPLY
              bool = true
              break
            end
          end
        }
      rescue Exception => err
        @exception = err
      ensure
        socket.close if socket
      end

      # There is no duration if the ping failed
      @duration = Time.now - start_time if bool

      return bool
    end