def delete_record(record, server, key_file, key_name):
if determine_if_ip_address(record):
reverse_record = str(dns.reversename.from_address(record))
re_record = re.search(r"([0-9]+)\.(.*).$", reverse_record)
else:
re_record = re.search(r"(\w+)\.(.*)$", record)
record = re_record.group(1)
domain = re_record.group(2)
try:
key_ring = keyutils.read_tsigkey(key_file, key_name)
except:
raise
update = dns.update.Update(domain, keyring = key_ring)
update.delete(record)
response = dns.query.tcp(update, server)
print "Record Deletion Output: %s\n" % response
def add_reverse_record(fqdn, domain, ip_address, ttl, dns_server, key_file, key_name):
"""Add a reverse PTR record to the specific DNS server and zone."""
reverse_fqdn = str(dns.reversename.from_address(ip_address))
reverse_ip = re.search(r"([0-9]+).(.*).$", reverse_fqdn).group(1)
reverse_domain = re.search(r"([0-9]+).(.*).$", reverse_fqdn).group(2)
try:
key_ring = keyutils.read_tsigkey(key_file, key_name)
except:
raise
update = dns.update.Update(reverse_domain, keyring = key_ring)
update.replace(reverse_ip, ttl, 'PTR', fqdn + ".")
try:
response = dns.query.tcp(update, dns_server)
except Exception, err:
exc_type, exc_obj, exc_tb = sys.exc_info()
print "type: %s, obj: %s, tb: %s" % (exc_type, exc_obj, exc_tb)
print "Unhandled exception in add_forward_record: %s" % err
raise
def add_forward_record(hostname, domain, ip_address, ttl, dns_server, key_file, key_name):
"""Add an A record to the specific DNS server
with the provided hostname/IP/key information."""
try:
key_ring = keyutils.read_tsigkey(key_file, key_name)
except:
raise
update = dns.update.Update(domain, keyring = key_ring)
update.replace(hostname, ttl, 'A', ip_address)
try:
response = dns.query.tcp(update, dns_server)
except dns.tsig.PeerBadKey:
print "The remote DNS server %s did not accept the key passed." % dns_server
raise
except Exception, err:
exc_type, exc_obj, exc_tb = sys.exc_info()
print "type: %s, obj: %s, tb: %s" % (exc_type, exc_obj, exc_tb)
print "Unhandled exception in add_forward_record: %s" % err
raise
type="string")
parser.add_option("--keyfile", dest="key_file",
help="File containing the TSIG key.",
type="string")
parser.add_option("--keyname", dest="key_name",
help="TSIG key name to use for the DDNS update.",
type="string")
parser.add_option("--server", dest="dns_server",
help="DNS server to query.",
type="string")
parser.add_option("--ttl",dest="ttl",
help="Time to Live (in Seconds). Default: 86400",
type="int",default=86400)
(options, args) = parser.parse_args()
orig_hostname = re.search(r"(\w+).(.*)", options.orig).group(1)
orig_domain = re.search(r"(\w+).(.*)", options.orig).group(2)
print "CNAME record to be added: %s, CNAME points to: %s, DNS Server: %s" % (options.orig, options.dest, options.dns_server)
keyring = keyutils.read_tsigkey(options.key_file, options.key_name)
update = dns.update.Update(orig_domain, keyring = keyring)
update.replace(orig_hostname, options.ttl, 'CNAME', options.dest + ".")
print "--- Updating CNAME Record"
response = dns.query.tcp(update,options.dns_server)
print "Output: %s" % response