xip.io implementation with powerdns_pipe in ruby

powerdns.conf

launch=pipe
pipe-command=/path/to/xipio-pipe.rb
pipe-timeout=200
pipe-regex=^.*.ip.ipq.co;.*$

xipio-pipe.rb

#!/usr/bin/env ruby
require 'rubygems'
require 'powerdns_pipe'
require 'ipaddr'

# *.10.0.0.1.ip.ipq.co
ipre = Regexp.new('^(.*?)([0-9]{1,3}\.[0-9]{1,3}\.[0-9]{1,3}\.[0-9]{1,3})\.ip\.ipq\.co$')
# *.abc123.ip.ipq.co
wildre = Regexp.new('^(.+)\.([A-Za-z0-9]{3,7})\.ip\.ipq\.co$')
# abc123.ip.ipq.co
ipsre = Regexp.new('^([A-Za-z0-9]{3,7})\.ip\.ipq\.co$')

pipe = PowerDNS::Pipe.new :banner => 'ip.ipq.co pipe'
pipe.run! do
  if m = ipre.match(question.name)
    ip = IPAddr.new(m[2])
    case question.qtype
    when "CNAME", "ANY"
      answer :name => question.name , :type => 'CNAME', :ttl => 3600, 
        :content => "#{ip.to_i.to_s(36)}.ip.ipq.co"
    end
  elsif m = wildre.match(question.name)
    case question.qtype
    when "CNAME", "ANY"
      answer :name => question.name , :type => 'CNAME', :ttl => 3600, 
        :content => "#{m[2]}.ip.ipq.co"
    end
  elsif m = ipsre.match(question.name)
    ip = IPAddr.new(m[1].to_i(36), Socket::AF_INET)
    case question.qtype
    when "A", "ANY"
      answer :name => question.name , :type => 'A', :ttl => 3600, 
        :content => ip.to_s
    end
  end
end

well, i should try such things on different networks before posting -- works from outside the office.
no, forcing v4 doesn't help. it seems to be something else with our gateway. the same with xip.io.

thank you for turning my head ;)