Gets the local bind address given a network to look for.

get_local_bind_addr.rb

require 'netaddr'
require 'socket'
network = NetAddr::CIDR.create(ARGV[0])
ips = Socket.ip_address_list.map {|a| a.ip_address}
ips.each do |ip|
  if network.contains?(ip)
    puts ip
    exit
  end
end