DZone Snippets: ip code

IP Catcher

amer (Amer Jazaerly) — Sat, 26 Apr 2008 08:18:04 GMT

--Howto use--
the command line:
ruby /path/to/ipcatcher.rb /path/to/filename
the program will print all the ip addresses which is inside the file.
the program doesn't print the same ip address twice. with no duplications.
Done by Amer Jazaerly.there is no copyright.
have fun ;)



#!/usr/bin/ruby



def get_ips(file)

  ips = []

  File.read(file).to_a.each do |place|

    sf = 0

    while sfn = place.index(/(25[0-5]|2[0-4][0-9]|[01]?[0-9][0-9]?)\.(25[0-5]|2[0-4][0-9]|[01]?[0-9][0-9]?)\.(25[0-5]|2[0-4][0-9]|[01]?[0-9][0-9]?)\.(25[0-5]|2[0-4][0-9]|[01]?[0-9][0-9]?)/,sf)

      sf = sfn + 3

      ips << $&

    end

  end

  return ips

end



get_ips(ARGV[0]).uniq.each { |ip| puts ip }

Finding your WAN IP address

jrobertson (James Robertson) — Fri, 11 Apr 2008 09:14:36 GMT

My server sits behind a NAT router, so finding out my public IP address is a non-trivial task. I can use curl to poll checkip.dyndns.org for my current address:



curl -s checkip.dyndns.org

The current IP check returns the information in this format: Current IP CheckCurrent IP Address: 216.239.39.99

Using cut, I can extract just the information that I need:



curl -s checkip.dyndns.org|cut -d ":" -f2|cut -d "<" -f1

That produces something a bit more readable: 216.239.39.99

-------------------------
This article snippet was copied from My sysadmin toolbox [linux.com] while I was googling for 'apt-cache search dyndns'.

Convert an integer to IP string

markpercival (Mark Percival) — Fri, 04 Apr 2008 21:30:36 GMT

Convert an integer to IP. I don't think you can do this with IPAddr, but I could be wrong

Edit, the original didn't work for low ranges.

And I was wrong about the IPAddr thing. I should have google'd better.

IPAddr.new(16909060, Socket::AF_INET).to_s

Ping a range of IP addresses

jrobertson (James Robertson) — Tue, 11 Mar 2008 09:06:19 GMT



(1..254).each {|i| puts ": found 192.168.1.#{i}" if  `ping 192.168.1.#{i} -c 1 -w 1`.match(/ttl/) }

Getting a client's IP address with EventMachine

peter (Peter Cooperx) — Sun, 03 Feb 2008 20:12:09 GMT

This is from, and by: http://nhw.pl/wp/2007/12/07/eventmachine-how-to-get-clients-ip-address/ .. I just wanted a more permanent reference as it's cool code.



EventMachine::run {

   EventMachine::open_datagram_socket $conf[:address],

                                 $conf[:udp_port], CustomServer

}



module CustomServer

   def receive_data d

      pp get_peername[2,6].unpack "nC4"

   end

end

Format IPv4 address in octal binary format and vice versa (Ruby / Rails)

MichaelWhi (Michael Whittaker) — Fri, 28 Dec 2007 14:12:12 GMT

Format an IPv4 address like 192.168.1.1 in dotted binary format like 11000000.10101000.00000001.00000001
You also need this class: http://snippets.dzone.com/posts/show/2472
For Rails: Put this in your controller!



  # convert a dotted decimal IPv4 address to dotted binary format

  def ipv4_to_binary(ipv4addr)

    ia = ipv4addr.to_s.split('.')

    if ia.size != 4

      return "0.0.0.0"

    end

    output = ""

    i = 1

    for octett in ia

      output = output + octett.to_i.to_s(2).using("########","0",true)

      if i < 4

        output = output + "."

      end

      i += 1

    end

    return output

  end

  

  

  # convert a IPv4 adress in binary dotted format to a dotted IPv4 address

  def binary_to_ipv4(ipv4addr)

    ia = ipv4addr.to_s.split('.')

    if ia.size != 4

      return "0.0.0.0"

    end

    output = ""

    i = 1

    for octett in ia

      output = output + octett.to_s.to_i(2).to_s

      if i < 4

        output = output + "."

      end

      i += 1

    end

    return output

  end

External IP

abe238 (Abe Diaz) — Fri, 07 Dec 2007 21:15:47 GMT

I use this to find the external ip

aBe



#!/usr/bin/env ruby

 require 'win32ole'

 require 'open-uri'

 echocmd = "IP: "

 ip = ( open("http://myip.dk") {|f| /([0-9]{1,3}\.){3}[0-9]



{1,3}/.match(f.read)[0].to_a[0]})



puts echocmd + ip

Send custom UDP packets in Ruby

ntk () — Fri, 14 Sep 2007 11:19:36 GMT

From: http://www.ruby-forum.com/topic/124159
Author: Bill Kelly

For yet another nifty UDP snippet see Skype-Style Firewall Busting with Ruby and UDP.





require 'socket'



#abort "Usage: server_addr, server_port, cmd_str" unless ARGV.length == 3



UDP_RECV_TIMEOUT = 3  # seconds



def q2cmd(server_addr, server_port, cmd_str)

  resp, sock = nil, nil

  begin

   cmd = "\377\377\377\377#{cmd_str}\0"

    sock = UDPSocket.open

    sock.send(cmd, 0, server_addr, server_port)

    resp = if select([sock], nil, nil, UDP_RECV_TIMEOUT)

      sock.recvfrom(65536)

    end

    if resp

      resp[0] = resp[0][4..-1]  # trim leading 0xffffffff

    end

  rescue IOError, SystemCallError

  ensure

    sock.close if sock

  end

  resp ? resp[0] : nil

end



# your firewall has to allow communication with IP address 67.19.248.74 (port 27912)

#server, port, cmd = *ARGV

server = "tastyspleen.net"

port = 27912

cmd = "status"



result = q2cmd(server, port, cmd)

puts result

Server name/IP converter

Minimiscience (Guildorn Tanaleth) — Thu, 05 Jul 2007 02:24:29 GMT

When passed either an IPv4 address or the name of a domain or server, this script will return either a name or an IP, respectively.



#!/usr/bin/perl -w

use strict;

use Socket;

my $arg = shift;

if ($arg =~ /^(\d+\.){3}\d+$/) {

 print scalar gethostbyaddr(inet_aton($arg), AF_INET), "\n"

} else { printf "%vd\n", scalar gethostbyname $arg }

Get external IP address

martinx (martin) — Thu, 03 May 2007 03:51:37 GMT

Another snippet code goes here:http://snippets.dzone.com/posts/show/3947 by ttmrichter

enjoy:)



require 'open-uri'

require 'rubygems'

require 'hpricot'



puts (Hpricot(open('http://myip.dk'))/"//td/font/b")[0].inner_html