The code as you've quoted it works fine when I give it a hardcoded domain: 

$domain = 'foobar.foodomain.com';
$dns = join '|', '', ( map { sprintf('%02d',length $_), $_ } split /\.
+/, $domain ), '00', '';
print "$dns\n";
# prints: |06|foobar|09|foodomain|03|com|00|

[download]

So I'd say you need to look at your input.

Aaron B.
Available for small or large Perl jobs; see my home node.

In reply to Re^5: Inserting domain name into Snort rule by aaron_baugher
in thread Inserting domain name into Snort rule by miniperl

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