"""
Copyright (c) 2008, Gianluca Lini
All rights reserved.

Redistribution and use in source and binary forms, with or without
modification, are permitted provided that the following conditions are met:
    * Redistributions of source code must retain the above copyright
      notice, this list of conditions and the following disclaimer.
    * Redistributions in binary form must reproduce the above copyright
      notice, this list of conditions and the following disclaimer in the
      documentation and/or other materials provided with the distribution.
    * Neither the name of the <organization> nor the
      names of its contributors may be used to endorse or promote products
      derived from this software without specific prior written permission.

THIS SOFTWARE IS PROVIDED BY Gianluca Lini ''AS IS'' AND ANY
EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED
WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
DISCLAIMED. IN NO EVENT SHALL Gianluca Lini BE LIABLE FOR ANY
DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES
(INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND
ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
(INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS
SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
"""
#!/usr/bin/python
import urllib2
import os
import re
import smtplib

class DROP:
 global netmask
 netmask = {"/0" : "0.0.0.0","/1" : "128.0.0.0","/2" : "192.0.0.0","/3" : "224.0.0.0","/4" : "240.0.0.0","/5" : "248.0.0.0","/6" : 
"252.0.0.0","/7" : "254.0.0.0","/8" : "255.0.0.0","/9" : "255.128.0.0","/10" : "255.192.0.0","/11" 
: "255.224.0.0","/12" : "255.240.0.0","/13" : "255.248.0.0","/14" : 
"255.252.0.0","/15" : "255.254.0.0","/16" : "255.255.0.0","/17" : 
"255.255.128.0","/18" : "255.255.192.0","/19" : "255.255.224.0","/20" : 
"255.255.240.0","/21" : "255.255.248.0","/22" : "255.255.252.0","/23" : 
"255.255.254.0","/24" : "255.255.255.0","/25" : "255.255.255.128","/26" : 
"255.255.255.192","/27" : "255.255.255.224","/28" : "255.255.255.240","/29" : 
"255.255.255.248","/30" : "255.255.255.252","/31" : "255.255.255.254","/32" : 
"255.255.255.255"
}
 def savefile(self, data):
    dlist = open("droplist.new", "w")
    dlist.write(data)
    dlist.close()
    return 1
 def readfile(self,name):
    list = open(name, "r")
    file = list.read()
    list.close()
    return file
 def download(self):
  try:
    opener = urllib2.build_opener()
    opener.addheaders = [('User-agent', 'Mozilla/5.0')]
    sock = opener.open("http://www.spamhaus.org/drop/drop.lasso")
    droplist = sock.read()
    sock.close()
    self.savefile(droplist)
    return 1
  except:
   return 0
 def savebckup(self, data):
    dlist = open("droplist.bkp", "w")
    dlist.write(data)
    dlist.close()
    return 1
 def prepare(self, data):
    matcher = re.compile('\d+\.\d+\.\d+\.\d+.\d+')
    matched = matcher.findall(data)
    #print matched
    return matched
 def route2insert(self, newlist,oldlist):
    com =  filter( lambda x: x in oldlist, newlist)
    return filter( lambda x: x not in com, newlist)
 def route2delete(self, newlist,oldlist):
    com =  filter( lambda x: x in oldlist, newlist)
    return filter( lambda x: x not in com, oldlist)
 def sendmail(self, to, msg):
    fromaddr = "sdaa@xxx.it"
    toaddrs  = to
    subject = "SpamHaus DropList Automated Alert"
    headers = "From: %s\r\nTo: %s\r\nSubject: %s\r\n\r\n" % (fromaddr, toaddrs, subject)
    message = headers + msg
    server = smtplib.SMTP('localhost')
    #debug level 
    #server.set_debuglevel(1)
    server.sendmail(fromaddr, toaddrs, message)
    server.quit()
 def sendmailauth(self, to, msg, login, passwd):
    fromaddr = "sdaa@xxx.it"
    toaddrs  = to
    subject = "SpamHaus DropList Automated Alert"
    headers = "From: %s\r\nTo: %s\r\nSubject: %s\r\n\r\n" % (fromaddr, toaddrs, subject)
    message = headers + msg
    server = smtplib.SMTP('localhost')
    #debug level 
    #server.set_debuglevel(1)
    server.login(login,passwd)
    server.sendmail(fromaddr, toaddrs, message)
    server.quit()
 def rotteadd(self, data):
  strrotte = ""
  for i in data:
    matcher = re.compile('\/\d+')
    matched = matcher.search(i)
    nmask = netmask[matched.group()]
    matcher = re.compile('\d+\.\d+\.\d+\.\d+')
    matched = matcher.search(i)
    strrotte +=  "ip route " + matched.group() + " " + nmask + " Null0\n"
  return strrotte
 def rottedel(self, data):
  strrotte = ""
  for i in data:
    matcher = re.compile('\/\d+')
    matched = matcher.search(i)
    nmask = netmask[matched.group()]
    matcher = re.compile('\d+\.\d+\.\d+\.\d+')
    matched = matcher.search(i)
    strrotte +=  "no ip route " + matched.group() + " " + nmask + " Null0\n"
  return strrotte

null0 = DROP()
null0.download()
if not os.path.isfile('droplist.bkp'):
 null0.savebckup("")
newlist = null0.prepare(null0.readfile('droplist.new'))
oldlist = null0.prepare(null0.readfile('droplist.bkp'))
r2in = null0.route2insert(newlist,oldlist)
r2del = null0.route2delete(newlist,oldlist)
mailbody = null0.rotteadd(r2in) + null0.rottedel(r2del)
#print mailbody
if not mailbody:
 mailbody = "Nessuna modifica alla lista"
 null0.sendmail("yourmail@yourdomain", mailbody)
else:
 null0.sendmail("yourmail@yourdomain", mailbody)
null0.savebckup(null0.readfile('droplist.new'))