'''
Created on 04.05.2011
@author: Thomas Fehr, me@monsterli.ch, http://thomasjfehr.monsterli.ch/blog
'''

SHOW_DEBUG_MSG = 0

import string
import sys
import socket


'''
@return: 0    If the ip-address is not blacklisted
@return: 1    If the ip-address is blacklisted
'''
def checkIfBlacklisted( ip, blacklistURL):
    if SHOW_DEBUG_MSG: print "Checking %s on %s" %(ip,blacklistURL)

    # turn "1.2.3.4" into "4.3.2.1.DNS_BLACKLIST_DOMAIN"
    iplist = string.split(ip, ".")
    iplist.reverse()
    ip = string.join(iplist, ".")
    ip += "." + blacklistURL

    try:
        #if blacklisted, we receive a IP in a the range 127.0.0.x
        ret = socket.gethostbyname( ip )
        if SHOW_DEBUG_MSG: print "Blacklisted! returned: %s" %ret
        return 1
    except socket.gaierror, message:
        if SHOW_DEBUG_MSG: print "Not blacklisted [%s]" % message
        return 0

if __name__ == "__main__":
    if len(sys.argv) > 2:        
        print checkIfBlacklisted( sys.argv[1] ,sys.argv[2])