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#!/usr/bin/env python
#
"""
get-ip.py: resolve given DNS names into IP addresses. The -s switch
constains answers to only ones secured by DNSSEC. The -4 switch only
returns IPv4 addresses, the -6 switch only IPv6 addresses.
An example run:
$ python async-get-ip.py www.panix.com www.isoc.org www.verisignlabs.com
submitted query for www.panix.com
submitted query for www.isoc.org
submitted query for www.verisignlabs.com
www.panix.com: IPv4 166.84.62.125
www.panix.com: IPv4 166.84.62.253
www.verisignlabs.com: IPv4 72.13.58.64
www.verisignlabs.com: IPv6 2620:74:13:4400::201
www.isoc.org: IPv4 212.110.167.157
www.isoc.org: IPv6 2001:41c8:20::19
"""
import getdns, sys, getopt
def cbk(type, result, userarg, tid):
if type == getdns.CALLBACK_COMPLETE:
status = result.status
if status == getdns.RESPSTATUS_GOOD:
for addr in result.just_address_answers:
addr_type = addr['address_type']
addr_data = addr['address_data']
print("{0}: {1} {2}".format(userarg, addr_type, addr_data))
elif status == getdns.RESPSTATUS_NO_SECURE_ANSWERS:
print("{0}: No DNSSEC secured responses found".format(hostname))
else:
print("{0}: getdns.address() returned error: {1}".format(hostname, status))
elif type == getdns.CALLBACK_CANCEL:
print('Callback cancelled')
elif type == getdns.CALLBACK_TIMEOUT:
print('Query timed out')
else:
print('Unknown error')
def usage():
print("""\
Usage: get-ip.py [-s] [-4|-6] <domain1> <domain2> ...
-s: only return DNSSEC secured answers
-4: only return IPv4 address answers
-6: only return IPv6 address answers
-4 and -6 are mutually exclusive. If both are specified, IPv6 wins.
""")
sys.exit(1)
try:
(options, args) = getopt.getopt(sys.argv[1:], 's46')
except getopt.GetoptError:
usage()
else:
if not args:
usage()
extensions = { "return_both_v4_and_v6" : getdns.EXTENSION_TRUE }
ctx = getdns.Context()
tids = []
for hostname in args:
try:
tids.append(ctx.address(name=hostname, extensions=extensions, callback='cbk', userarg=hostname))
print ('submitted query for {0}'.format(hostname))
except getdns.error as e:
print(str(e))
break
ctx.run()
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