From: Sayori Chan <darkpython@...>
Date: 2011-12-13T22:17:13+09:00
Subject: Problems with Net::Ping

Hello.
I'm trying to make a small program to ping an IP through TCP/ICMP but
when I run it I get an error.
D:/RailsInstaller/Ruby1.9.2/lib/ruby/gems/1.9.1/gems/net-ping-1.5.2/lib/net/ping/ping.rb:80:in
`ping': no host specified (Argume
ntError)
        from
D:/RailsInstaller/Ruby1.9.2/lib/ruby/gems/1.9.1/gems/net-ping-1.5.2/lib/net/ping/tcp.rb:38:in
`ping'
        from png.rb:50:in `do_ping_tcp'
        from png.rb:19:in `initialize'
        from png.rb:61:in `new'
        from png.rb:61:in `<main>'
The snip of code which ping works fine if its alone but something gets
messy with the rest of the code  and I just don't know what is it. Any
ideas?

require 'rubygems'
require 'net/ping'
include Net

class Ping
  def initialize(*argv)
    @argv = argv

    if  @argv[0]=="help" || !@argv[0]
      send :help
    end
    if !@argv[1]
      @argv[1]="tcp"
    end
    # swap with case() later
    if @argv[1] == "tcp"
      send :do_ping_tcp
    elsif @argv[1] == "icmp"
      send :do_ping_icmp
    end
  end

  def repeat_every(interval)
    loop do
      start_time = Time.now
      yield
      elapsed = Time.now - start_time
      sleep([interval - elapsed, 0].max)
    end
  end

  def help
    puts <<-help
    Commands:
  help
  end

  def do_ping_tcp
    Net::Ping::TCP.econnrefused = true
    result=Net::Ping::TCP.new('192.168.1.1',80)
    if result.ping?
      puts "alive..."
    else
      puts "dead..."
    end

  end

  def do_ping_icmp
  end
end
ping = Ping.new(*ARGV)

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