Puppet users - May 2014 - Calculating network address - boolean opertors

Hello folks

i need a bit of help calculating the network address from ip an netmask 
avoiding the use of stdlib within a puppet maifest. 

#given IP address and netmask
$ip="10.122.3.177"
$nm="255.255.255.128"

#splitting into octets -  split() didnt work for some reason
if $ip =~ /([0-9]+)\.[0-9]+\.[0-9]+\.[0-9]+/ {$ip1 = $1} #  same for $ip2 = 
$2  .......
if $nm =~ /([0-9]+)\.[0-9]+\.[0-9]+\.[0-9]+/ {$nm1 = $1}

# apply boolean AND 
$oc1=$ip1 && $nm1
##### Could not parse for environment production: Could not match && at 
.......


notify {"$oc1":}

thanks for your help

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