def update_tld_rootservers(self):
"""
Find the DNS TLD servers for the domain from root servers
"""
self.tld_servers = []
rootservers = RootServers(self.rootfile)
if not rootservers.is_downloaded:
rootservers.download()
server = rootservers.random_rootserver(self.rrtype).address
rs = resolve_records(query=self.tld,
nameserver=server,
rrtype='NS',
timeout=self.timeout)
tld_server_addresses = {}
for entry in filter(lambda x: x['rrtype'] == self.rrtype,
rs['additional']):
try:
tld_server_addresses[entry['name']] = entry['address']
except IndexError:
raise DNSError(
'Additional data did not contain proper %s records' %
self.rrtype)
self.tld_servers = []
for entry in filter(lambda x: x['rrtype'] == 'NS', rs['authority']):
try:
self.tld_servers.append(tld_server_addresses[entry['target']])
except IndexError:
continue
def update_delegations(self):
"""
Query zone delegation details from one of the TLD servers
"""
self.__delslice__(0, len(self))
self.update_tld_rootservers()
if len(self.tld_servers) == 0:
raise DNSError('No TLD servers for %s' % self.domain)
server = self.tld_servers[random.randint(0, len(self.tld_servers) - 1)]
rs = resolve_records(self.domain, server, 'NS', self.timeout)
reg_server_addresses = {}
for entry in filter(lambda x: x['rrtype'] == self.rrtype,
rs['additional']):
reg_server_addresses[entry['name']] = entry['address']
for entry in filter(lambda x: x['rrtype'] == 'NS', rs['authority']):
try:
address = reg_server_addresses[entry['target']]
except IndexError:
# Need to query address for server
address = None
self.append(
DelegateServer(self, self.rrtype, entry['target'], address))
def __init__(self, server, domain):
self.server = server
self.domain = domain
res = resolve_records(self.domain, self.server, 'SOA')
if len(res['results']) != 1:
raise ValueError('Invalid SOA query result: %s' % res['results'])
data = res['results'][0]
if data['rrtype'] != 'SOA':
raise ValueError('Response is not a SOA record')
name = '%s' % data['name']
if self.domain != name:
raise ValueError('Received SOA name %s expected %s' %
(name, self.domain))
self.master_server = '%s' % data['mname']
self.rname = '%s' % data['rname']
for field in ('serial', 'refresh', 'retry', 'expire', 'minimum'):
if field not in data.keys():
raise ValueError('Invalid SOA query result: missing %s' %
field)
setattr(self, field, data[field])
def update_delegations(self):
"""
Query zone delegation details from one of the TLD servers
"""
self.__delslice__(0, len(self))
self.update_tld_rootservers()
if len(self.tld_servers) == 0:
raise DNSError('No TLD servers for %s' % self.domain)
server = self.tld_servers[random.randint(0, len(self.tld_servers)-1)]
rs = resolve_records( self.domain, server, 'NS', self.timeout)
reg_server_addresses = {}
for entry in filter(lambda x: x['rrtype']==self.rrtype, rs['additional']):
reg_server_addresses[entry['name']] = entry['address']
for entry in filter(lambda x: x['rrtype']=='NS', rs['authority']):
try:
address = reg_server_addresses[entry['target']]
except IndexError:
# Need to query address for server
address = None
self.append(DelegateServer(self, self.rrtype, entry['target'], address ))
def update_tld_rootservers(self):
"""
Find the DNS TLD servers for the domain from root servers
"""
self.tld_servers = []
rootservers = RootServers(self.rootfile)
if not rootservers.is_downloaded:
rootservers.download()
server = rootservers.random_rootserver(self.rrtype).address
rs = resolve_records(query=self.tld, nameserver=server, rrtype='NS', timeout=self.timeout)
tld_server_addresses = {}
for entry in filter(lambda x: x['rrtype']==self.rrtype, rs['additional']):
try:
tld_server_addresses[entry['name']] = entry['address']
except IndexError:
raise DNSError('Additional data did not contain proper %s records' % self.rrtype)
self.tld_servers = []
for entry in filter(lambda x: x['rrtype']=='NS', rs['authority']):
try:
self.tld_servers.append(tld_server_addresses[entry['target']])
except IndexError:
continue
def nameservers(self):
addresses = []
res = resolve_records(self.domain, self.address, 'NS')
for r in res['results']:
if r['rrtype'] != 'NS':
continue
server = '%s' % r['target']
addresses.append(server.rstrip('.'))
return addresses
def nameservers(self):
addresses = []
res = resolve_records(self.domain, self.address, 'NS')
for r in res['results']:
if r['rrtype'] != 'NS':
continue
server = '%s' % r['target']
addresses.append(server.rstrip('.'))
return addresses
def query_server(self, server, rrtype):
"""Query RR for server
Resolve this zone's RR from given server
"""
return resolve_records(
query=self.domain,
rrtype=rrtype,
nameserver=server,
timeout=self.timeout
)
def __init__(self, server, domain):
self.server = server
self.domain = domain
res = resolve_records(self.domain, self.server, 'SOA')
if len(res['results']) != 1:
raise ValueError('Invalid SOA query result: %s' % res['results'])
data = res['results'][0]
if data['rrtype'] != 'SOA':
raise ValueError('Response is not a SOA record')
name = '%s' % data['name']
if self.domain != name:
raise ValueError('Received SOA name %s expected %s' % (name, self.domain))
self.master_server = '%s' % data['mname']
self.rname = '%s' % data['rname']
for field in ('serial', 'refresh', 'retry', 'expire', 'minimum'):
if field not in data.keys():
raise ValueError('Invalid SOA query result: missing %s' % field)
setattr(self, field, data[field])
