I'm trying to generate a list of all IP adresses in a range. For example 1.2.3.0/24 should generate a list of 1.2.3.0 to 1.2.3.255. This is the code I use: 
sub getAllIPs {
    my $ip = Net::IP->new($range) or die (Net::IP::Error());
    my @IPs ;
      # Loop
      do {
          push @IPs, $ip->ip() ;
      } while (++$ip);
    
    return @IPs ;    
}

[download]

This works fine, but when I use 1.2.3.4/23 for instance, I get an Invalid prefix error. That's logical because that's an IP that resides in the middle of a subnet.

Since this is going to be used by people who aren't interested in the technical aspects of networking, I was thinking about something like:

http://jodies.de/ipcalc?host=1.2.3.4&mask1=23&mask2=

where it calculates the first (1.2.2.1) and the last adress (1.2.3.254) and shows every IP in between.

I skimmed the manuals, but don't find any reference as to how you can generate the first and last IP instead of giving an error?

In reply to Display all IPs in given range by Anonymous Monk

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