From: Mike Wilson <wmwilson01@...>
Date: 2003-12-24T02:06:29+09:00
Subject: Re: need help with unpacking ip address

Thanks!


>From: Dennis Ranke <dennis.ranke@epost.de>
>Reply-To: ruby-talk@ruby-lang.org
>To: ruby-talk@ruby-lang.org (ruby-talk ML)
>Subject: Re: need help with unpacking ip address
>Date: Wed, 24 Dec 2003 00:56:55 +0900
>
>On Wed, 24 Dec 2003 00:45:40 +0900, Mike Wilson <wmwilson01@hotmail.com> 
>wrote:
>
>>I was wanting to write a quick little subnet calculator, but I'm having 
>>trouble figuring out how to get the ip address to binary.  Given 
>>10.159.23.185, the right answer is "00001010.10011111.00010111.10111001".  
>>I try using "10.159.23.185".unpack("B8B8B8B8"), but receive ["00110001", 
>>"00110000", "00101110", "00110001"] as my answer, which obviously doesn't 
>>match up.  What am I doing wrong?
>
>You are unpacking the the binary data of the string "10.159.23.185". You 
>need to pack the 4 numbers into a 4 byte string first, for example like 
>this:
>
>irb(main):001:0> [10, 159, 23, 185].pack('C*').unpack('B8B8B8B8')
>=> ["00001010", "10011111", "00010111", "10111001"]
>
>--
>exoticorn/farbrausch
>

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