def doWork():
for ip in file("list12.txt"):
i = a.next()
ip = ip.strip()
d = Deferred()
name = Name('version.bind')
axf = AXFRController(name,d)
dns = DNSDatagramProtocol(axf)
query = Query()
query.name = Name('version.bind')
query.type = TXT
query.cls = CH
query = [query]
d1 = dns.query((ip,53), query)
d1.addCallback(getResult,ip)
d1.addErrback(getError,ip)
yield d1