/usr/share/doc/python-getdns-doc/examples/get-ns-ip.py is in python-getdns-doc 1.0.0~b1-1.
This file is owned by root:root, with mode 0o755.
The actual contents of the file can be viewed below.
1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 67 68 69 70 71 | #!/usr/bin/env python
#
"""
Lookup an NS record and printout all the hostnames and associated IP
addresses of the listed nameservers.
"""
import getdns, pprint, sys
extensions = { "return_both_v4_and_v6" : getdns.EXTENSION_TRUE }
def usage():
print("""Usage: get-ns-ip.py <zone>
where <zone> is a DNS zone (domain).
""")
sys.exit(1)
def get_ip(ctx, qname):
iplist = []
try:
results = ctx.address(name=qname, extensions=extensions)
except getdns.error as e:
print(str(e))
sys.exit(1)
if results.status == getdns.RESPSTATUS_GOOD:
for addr in results.just_address_answers:
iplist.append(addr['address_data'])
else:
print("getdns.address() returned an error: {0}".format(results['status']))
return iplist
if __name__ == '__main__':
if len(sys.argv) != 2:
usage()
qname = sys.argv[1]
ctx = getdns.Context()
try:
results = ctx.general(name=qname, request_type=getdns.RRTYPE_NS)
except getdns.error as e:
print(str(e))
sys.exit(1)
status = results.status
hostlist = []
if status == getdns.RESPSTATUS_GOOD:
for reply in results.replies_tree:
answers = reply['answer']
for answer in answers:
if answer['type'] == getdns.RRTYPE_NS:
iplist = get_ip(ctx, answer['rdata']['nsdname'])
for ip in iplist:
hostlist.append( (answer['rdata']['nsdname'], ip) )
elif status == getdns.RESPSTATUS_NO_NAME:
print("{0}: no such DNS zone".format(qname))
elif status == getdns.RESPSTATUS_ALL_TIMEOUT:
print("{0}, NS: query timed out".format(qname))
else:
print("{0}, NS: unknown return code: {1}".format(qname, results["status"]))
# Print out each NS server name and IP address
for (nsdname, addr) in sorted(hostlist):
print(nsdname, addr)
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