From: Hassan Schroeder <hassan.schroeder@...>
Date: 2009-03-01T07:49:17+09:00
Subject: Re: Gets the broadcast address of an IP address

On Sat, Feb 28, 2009 at 11:12 AM, Eleanor McHugh
<eleanor@games-with-brains.com> wrote:

>> ... But is there a way to get automatically the
>> "192.168.0.255" address thanks to a Ruby method?  I know I can get my IP
>> with IPSocket.getaddress(Socket.gethostname) but I don't see any way to
>> gets its broadcast address.

> The simplest way to do it is to use a regex to change the last term in the
> quad:
>
> IPSocket.getaddress(Socket.gethostname).gsub!(/.\d{1,3}$/, '.255')

Simple but not necessarily correct  :-)

<http://learn-networking.com/network-design/how-a-broadcast-address-works>

FWIW,
-- 
Hassan Schroeder ------------------------ hassan.schroeder@gmail.com