CPAN is, as ever, your friend. I would use the Net::IPv4Addr module. From the synopsis:

use Net::IPv4Addr qw( :all );
my ($broadcast) = ipv4_broadcast($ip_str, $msk_str);

[download]

Where $ip_str and $msk_str in this case (assuming you have (0..255) in your arrays) would be:

$ip_str = join('.', @ip);
$msk_str = join('.', @netmask);

[download]

If you want to know how your problem is solved in the module, then download it and use the source luke.

In reply to Re: Broadcast address: a binary anding question by quidity
in thread Broadcast address: a binary anding question by Anonymous Monk

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