From: Heinrich Piard <linux@...>
Date: 2008-04-19T06:33:06+09:00
Subject: Re: system(ping)

Daniel Berger wrote:
> On Apr 17, 3:04�pm, Heinrich Piard <li...@piard.de> wrote:
>> � � � � system('ping -c 5' + host)
>> end
> 
> gem install net-ping
> 
> Regards,
> 
> Dan

Hi all,

thanks for your input.
Here the script which checks packet loss and sends me an e-mail:

#!/usr/bin/ruby
#
#
#
require "net/ping"
include Net
require 'socket'
include Socket::Constants
require 'daemons'
include Daemonize
require 'action_mailer'

# all for mailing requirementsActionMailer::Base.sendmail_settings = { 
:address => 'mailhostXYZ',
ActionMailer::Base.sendmail_settings = { :address => 'mailhostXYZ',
                                                                   :port 
=> 25 }
@RecipientAddress = 'address@domain.com'

class SimpleMailer < ActionMailer::Base
        def simple_message(recipient)
        from 'sender@domain.com'
        recipients recipient
        subject 'Packet loss detected'
        body $Message
        end
end

daemonize()

ip_list = [ '192.168.1.1' , '192.168.1.2' , '192.168.1.3' , 
'192.168.1.4' , '192.168.1.5' , '192.168.1.6' , '192.168.1.7' , 
'192.168.1.8' ]
#total_networks_to_check = ip_list.size
#puts ip_list.size

loop do
begin
amount_of_pings = 10

PingTCP.econnrefused = true



ip_list.each_with_index do |item, index|

counter_positive = 0
counter_negative = 10

10.times do
pe = Net::PingExternal.new("#{item}")

if pe.ping
      #puts "External ping successful"
      counter_positive = counter_positive + 1
      #puts 'counter_positive ' + counter_positive.to_s
else
      counter_negative = counter_negative - 1
      #puts 'counter_negative ' + counter_negative.to_s
end
end
        #if counter_negative > 0
                success_rate = (100 * counter_positive) / 
amount_of_pings
                #puts 'success_rate = ' + success_rate.to_s
                packet_loss = 100 - success_rate
                if packet_loss > 0
                        $Message = packet_loss.to_s + '\% packet loss 
for ' + "#{item}"
                        SimpleMailer.deliver_simple_message(@RecipientAddress)
                #puts 'packet_loss = ' + packet_loss.to_s
                else
                       success_rate = 0
                end
        #end
end
end
sleep 60
end


I had to delete some sensitive data, but this should basically work for 
everyone.

bye
Henry
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