Find location of server by local ip address

dc_location.rb

require 'socket'

def have_ip?(ip)
  ip_arr = Socket.ip_address_list.select{|intf| intf.ipv4?}
  ip_arr.to_s.scan(/(?<=: )[\d.]+(?=>)/).find{ |e| /#{ip}/ =~ e }
end


if File.exist?('/var/local/location.txt')
  dc_location = File.read('/var/local/location.txt')
elsif have_ip?("172.16")
  dc_location = 'dc2'
elsif have_ip?("192.168.10")
  dc_location = 'office'
elsif have_ip?("192.168.255")
  dc_location = 'home'
else
  dc_location = 'unknown'
end

puts dc_location