finding/calculating network using iproute2 tools

[Joseph Mack <mack.joseph@xxxxxxx>]

I'm changing the configure script from ifconfig/nestat -rn/route 
to the iproute2 tools (eg ip addr add...)

This IPs I put on the NICs (eg 192.168.1.1/24) have a 
network/netmask (here 192.168.1.0/24) which I use for iptables rules. 

I used to get the network from the output of netstat but that doesn't
work anymore. 

Is there a convenient way to get the network from the IP/mask (ie
via the tools) or do I have to calculate it?

Thanks Joe

-- 
Joseph Mack PhD, Senior Systems Engineer, Lockheed Martin
contractor to the National Environmental Supercomputer Center, 
mailto:mack.joseph@xxxxxxx ph# 919-541-0007, RTP, NC, USA