#!/usr/bin/env python

import re
import urllib

url=r'http://ftp.apnic.net/apnic/dbase/data/country-ipv4.lst'

handler=urllib.urlopen(url)

routes_file=open('routes.txt','w')

line_count=0

for line in handler.readlines():
    if line.find(': cn ') < 0: continue
    line_count+=1
    r=line.split(':')[1]
    r=r.strip()
    ip,mask=r.split('/')
    ip=ip.split('.')
    while len(ip) < 4:
        ip.append('0')
    
    mask=int(mask)
    
    bm='1'*mask+'0'*(32-mask)
    mask="%d.%d.%d.%d"%(int(bm[0:8],2),int(bm[8:16],2),int(bm[16:24],2),int(bm[24:32],2))

    routes_file.write('route %s %s %s 5\n'%('.'.join(ip),mask,'net_gateway'))

routes_file.close()

print "Usage: Append the content of the newly created routes.txt to your openvpn config file," \
      " and also add 'max-routes %d', which takes a line, to the head of the file." % (line_count+50)