/usr/lib/python2.7/dist-packages/twisted/names/test/test_names.py is in python-twisted-names 13.2.0-1ubuntu1.2.
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# Copyright (c) Twisted Matrix Laboratories.
# See LICENSE for details.
"""
Test cases for twisted.names.
"""
import socket, operator, copy
from StringIO import StringIO
from functools import partial, reduce
from twisted.trial import unittest
from twisted.internet import reactor, defer, error
from twisted.internet.defer import succeed
from twisted.names import client, server, common, authority, dns
from twisted.names.dns import Message
from twisted.names.error import DomainError
from twisted.names.client import Resolver
from twisted.names.secondary import (
SecondaryAuthorityService, SecondaryAuthority)
from twisted.test.proto_helpers import StringTransport, MemoryReactorClock
def justPayload(results):
return [r.payload for r in results[0]]
class NoFileAuthority(authority.FileAuthority):
def __init__(self, soa, records):
# Yes, skip FileAuthority
common.ResolverBase.__init__(self)
self.soa, self.records = soa, records
soa_record = dns.Record_SOA(
mname = 'test-domain.com',
rname = 'root.test-domain.com',
serial = 100,
refresh = 1234,
minimum = 7654,
expire = 19283784,
retry = 15,
ttl=1
)
reverse_soa = dns.Record_SOA(
mname = '93.84.28.in-addr.arpa',
rname = '93.84.28.in-addr.arpa',
serial = 120,
refresh = 54321,
minimum = 382,
expire = 11193983,
retry = 30,
ttl=3
)
my_soa = dns.Record_SOA(
mname = 'my-domain.com',
rname = 'postmaster.test-domain.com',
serial = 130,
refresh = 12345,
minimum = 1,
expire = 999999,
retry = 100,
)
test_domain_com = NoFileAuthority(
soa = ('test-domain.com', soa_record),
records = {
'test-domain.com': [
soa_record,
dns.Record_A('127.0.0.1'),
dns.Record_NS('39.28.189.39'),
dns.Record_SPF('v=spf1 mx/30 mx:example.org/30 -all'),
dns.Record_SPF('v=spf1 +mx a:\0colo', '.example.com/28 -all not valid'),
dns.Record_MX(10, 'host.test-domain.com'),
dns.Record_HINFO(os='Linux', cpu='A Fast One, Dontcha know'),
dns.Record_CNAME('canonical.name.com'),
dns.Record_MB('mailbox.test-domain.com'),
dns.Record_MG('mail.group.someplace'),
dns.Record_TXT('A First piece of Text', 'a SecoNd piece'),
dns.Record_A6(0, 'ABCD::4321', ''),
dns.Record_A6(12, '0:0069::0', 'some.network.tld'),
dns.Record_A6(8, '0:5634:1294:AFCB:56AC:48EF:34C3:01FF', 'tra.la.la.net'),
dns.Record_TXT('Some more text, haha! Yes. \0 Still here?'),
dns.Record_MR('mail.redirect.or.whatever'),
dns.Record_MINFO(rmailbx='r mail box', emailbx='e mail box'),
dns.Record_AFSDB(subtype=1, hostname='afsdb.test-domain.com'),
dns.Record_RP(mbox='whatever.i.dunno', txt='some.more.text'),
dns.Record_WKS('12.54.78.12', socket.IPPROTO_TCP,
'\x12\x01\x16\xfe\xc1\x00\x01'),
dns.Record_NAPTR(100, 10, "u", "sip+E2U",
"!^.*$!sip:information@domain.tld!"),
dns.Record_AAAA('AF43:5634:1294:AFCB:56AC:48EF:34C3:01FF')],
'http.tcp.test-domain.com': [
dns.Record_SRV(257, 16383, 43690, 'some.other.place.fool')
],
'host.test-domain.com': [
dns.Record_A('123.242.1.5'),
dns.Record_A('0.255.0.255'),
],
'host-two.test-domain.com': [
#
# Python bug
# dns.Record_A('255.255.255.255'),
#
dns.Record_A('255.255.255.254'),
dns.Record_A('0.0.0.0')
],
'cname.test-domain.com': [
dns.Record_CNAME('test-domain.com')
],
'anothertest-domain.com': [
dns.Record_A('1.2.3.4')],
}
)
reverse_domain = NoFileAuthority(
soa = ('93.84.28.in-addr.arpa', reverse_soa),
records = {
'123.93.84.28.in-addr.arpa': [
dns.Record_PTR('test.host-reverse.lookup.com'),
reverse_soa
]
}
)
my_domain_com = NoFileAuthority(
soa = ('my-domain.com', my_soa),
records = {
'my-domain.com': [
my_soa,
dns.Record_A('1.2.3.4', ttl='1S'),
dns.Record_NS('ns1.domain', ttl='2M'),
dns.Record_NS('ns2.domain', ttl='3H'),
dns.Record_SRV(257, 16383, 43690, 'some.other.place.fool', ttl='4D')
]
}
)
class ServerDNSTestCase(unittest.TestCase):
"""
Test cases for DNS server and client.
"""
def setUp(self):
self.factory = server.DNSServerFactory([
test_domain_com, reverse_domain, my_domain_com
], verbose=2)
p = dns.DNSDatagramProtocol(self.factory)
while 1:
listenerTCP = reactor.listenTCP(0, self.factory, interface="127.0.0.1")
# It's simpler to do the stop listening with addCleanup,
# even though we might not end up using this TCP port in
# the test (if the listenUDP below fails). Cleaning up
# this TCP port sooner than "cleanup time" would mean
# adding more code to keep track of the Deferred returned
# by stopListening.
self.addCleanup(listenerTCP.stopListening)
port = listenerTCP.getHost().port
try:
listenerUDP = reactor.listenUDP(port, p, interface="127.0.0.1")
except error.CannotListenError:
pass
else:
self.addCleanup(listenerUDP.stopListening)
break
self.listenerTCP = listenerTCP
self.listenerUDP = listenerUDP
self.resolver = client.Resolver(servers=[('127.0.0.1', port)])
def tearDown(self):
"""
Clean up any server connections associated with the
L{DNSServerFactory} created in L{setUp}
"""
# It'd be great if DNSServerFactory had a method that
# encapsulated this task. At least the necessary data is
# available, though.
for conn in self.factory.connections[:]:
conn.transport.loseConnection()
def namesTest(self, querying, expectedRecords):
"""
Assert that the DNS response C{querying} will eventually fire with
contains exactly a certain collection of records.
@param querying: A L{Deferred} returned from one of the DNS client
I{lookup} methods.
@param expectedRecords: A L{list} of L{IRecord} providers which must be
in the response or the test will be failed.
@return: A L{Deferred} that fires when the assertion has been made. It
fires with a success result if the assertion succeeds and with a
L{Failure} if it fails.
"""
def checkResults(response):
receivedRecords = justPayload(response)
self.assertEqual(set(expectedRecords), set(receivedRecords))
querying.addCallback(checkResults)
return querying
def testAddressRecord1(self):
"""Test simple DNS 'A' record queries"""
return self.namesTest(
self.resolver.lookupAddress('test-domain.com'),
[dns.Record_A('127.0.0.1', ttl=19283784)]
)
def testAddressRecord2(self):
"""Test DNS 'A' record queries with multiple answers"""
return self.namesTest(
self.resolver.lookupAddress('host.test-domain.com'),
[dns.Record_A('123.242.1.5', ttl=19283784), dns.Record_A('0.255.0.255', ttl=19283784)]
)
def testAddressRecord3(self):
"""Test DNS 'A' record queries with edge cases"""
return self.namesTest(
self.resolver.lookupAddress('host-two.test-domain.com'),
[dns.Record_A('255.255.255.254', ttl=19283784), dns.Record_A('0.0.0.0', ttl=19283784)]
)
def testAuthority(self):
"""Test DNS 'SOA' record queries"""
return self.namesTest(
self.resolver.lookupAuthority('test-domain.com'),
[soa_record]
)
def test_mailExchangeRecord(self):
"""
The DNS client can issue an MX query and receive a response including
an MX record as well as any A record hints.
"""
return self.namesTest(
self.resolver.lookupMailExchange(b"test-domain.com"),
[dns.Record_MX(10, b"host.test-domain.com", ttl=19283784),
dns.Record_A(b"123.242.1.5", ttl=19283784),
dns.Record_A(b"0.255.0.255", ttl=19283784)])
def testNameserver(self):
"""Test DNS 'NS' record queries"""
return self.namesTest(
self.resolver.lookupNameservers('test-domain.com'),
[dns.Record_NS('39.28.189.39', ttl=19283784)]
)
def testHINFO(self):
"""Test DNS 'HINFO' record queries"""
return self.namesTest(
self.resolver.lookupHostInfo('test-domain.com'),
[dns.Record_HINFO(os='Linux', cpu='A Fast One, Dontcha know', ttl=19283784)]
)
def testPTR(self):
"""Test DNS 'PTR' record queries"""
return self.namesTest(
self.resolver.lookupPointer('123.93.84.28.in-addr.arpa'),
[dns.Record_PTR('test.host-reverse.lookup.com', ttl=11193983)]
)
def testCNAME(self):
"""Test DNS 'CNAME' record queries"""
return self.namesTest(
self.resolver.lookupCanonicalName('test-domain.com'),
[dns.Record_CNAME('canonical.name.com', ttl=19283784)]
)
def testMB(self):
"""Test DNS 'MB' record queries"""
return self.namesTest(
self.resolver.lookupMailBox('test-domain.com'),
[dns.Record_MB('mailbox.test-domain.com', ttl=19283784)]
)
def testMG(self):
"""Test DNS 'MG' record queries"""
return self.namesTest(
self.resolver.lookupMailGroup('test-domain.com'),
[dns.Record_MG('mail.group.someplace', ttl=19283784)]
)
def testMR(self):
"""Test DNS 'MR' record queries"""
return self.namesTest(
self.resolver.lookupMailRename('test-domain.com'),
[dns.Record_MR('mail.redirect.or.whatever', ttl=19283784)]
)
def testMINFO(self):
"""Test DNS 'MINFO' record queries"""
return self.namesTest(
self.resolver.lookupMailboxInfo('test-domain.com'),
[dns.Record_MINFO(rmailbx='r mail box', emailbx='e mail box', ttl=19283784)]
)
def testSRV(self):
"""Test DNS 'SRV' record queries"""
return self.namesTest(
self.resolver.lookupService('http.tcp.test-domain.com'),
[dns.Record_SRV(257, 16383, 43690, 'some.other.place.fool', ttl=19283784)]
)
def testAFSDB(self):
"""Test DNS 'AFSDB' record queries"""
return self.namesTest(
self.resolver.lookupAFSDatabase('test-domain.com'),
[dns.Record_AFSDB(subtype=1, hostname='afsdb.test-domain.com', ttl=19283784)]
)
def testRP(self):
"""Test DNS 'RP' record queries"""
return self.namesTest(
self.resolver.lookupResponsibility('test-domain.com'),
[dns.Record_RP(mbox='whatever.i.dunno', txt='some.more.text', ttl=19283784)]
)
def testTXT(self):
"""Test DNS 'TXT' record queries"""
return self.namesTest(
self.resolver.lookupText('test-domain.com'),
[dns.Record_TXT('A First piece of Text', 'a SecoNd piece', ttl=19283784),
dns.Record_TXT('Some more text, haha! Yes. \0 Still here?', ttl=19283784)]
)
def test_spf(self):
"""
L{DNSServerFactory} can serve I{SPF} resource records.
"""
return self.namesTest(
self.resolver.lookupSenderPolicy('test-domain.com'),
[dns.Record_SPF('v=spf1 mx/30 mx:example.org/30 -all', ttl=19283784),
dns.Record_SPF('v=spf1 +mx a:\0colo', '.example.com/28 -all not valid', ttl=19283784)]
)
def testWKS(self):
"""Test DNS 'WKS' record queries"""
return self.namesTest(
self.resolver.lookupWellKnownServices('test-domain.com'),
[dns.Record_WKS('12.54.78.12', socket.IPPROTO_TCP, '\x12\x01\x16\xfe\xc1\x00\x01', ttl=19283784)]
)
def testSomeRecordsWithTTLs(self):
result_soa = copy.copy(my_soa)
result_soa.ttl = my_soa.expire
return self.namesTest(
self.resolver.lookupAllRecords('my-domain.com'),
[result_soa,
dns.Record_A('1.2.3.4', ttl='1S'),
dns.Record_NS('ns1.domain', ttl='2M'),
dns.Record_NS('ns2.domain', ttl='3H'),
dns.Record_SRV(257, 16383, 43690, 'some.other.place.fool', ttl='4D')]
)
def testAAAA(self):
"""Test DNS 'AAAA' record queries (IPv6)"""
return self.namesTest(
self.resolver.lookupIPV6Address('test-domain.com'),
[dns.Record_AAAA('AF43:5634:1294:AFCB:56AC:48EF:34C3:01FF', ttl=19283784)]
)
def testA6(self):
"""Test DNS 'A6' record queries (IPv6)"""
return self.namesTest(
self.resolver.lookupAddress6('test-domain.com'),
[dns.Record_A6(0, 'ABCD::4321', '', ttl=19283784),
dns.Record_A6(12, '0:0069::0', 'some.network.tld', ttl=19283784),
dns.Record_A6(8, '0:5634:1294:AFCB:56AC:48EF:34C3:01FF', 'tra.la.la.net', ttl=19283784)]
)
def test_zoneTransfer(self):
"""
Test DNS 'AXFR' queries (Zone transfer)
"""
default_ttl = soa_record.expire
results = [copy.copy(r) for r in reduce(operator.add, test_domain_com.records.values())]
for r in results:
if r.ttl is None:
r.ttl = default_ttl
return self.namesTest(
self.resolver.lookupZone('test-domain.com').addCallback(lambda r: (r[0][:-1],)),
results
)
def testSimilarZonesDontInterfere(self):
"""Tests that unrelated zones don't mess with each other."""
return self.namesTest(
self.resolver.lookupAddress("anothertest-domain.com"),
[dns.Record_A('1.2.3.4', ttl=19283784)]
)
def test_NAPTR(self):
"""
Test DNS 'NAPTR' record queries.
"""
return self.namesTest(
self.resolver.lookupNamingAuthorityPointer('test-domain.com'),
[dns.Record_NAPTR(100, 10, "u", "sip+E2U",
"!^.*$!sip:information@domain.tld!",
ttl=19283784)])
class DNSServerFactoryTests(unittest.TestCase):
"""
Tests for L{server.DNSServerFactory}.
"""
def _messageReceivedTest(self, methodName, message):
"""
Assert that the named method is called with the given message when
it is passed to L{DNSServerFactory.messageReceived}.
"""
# Make it appear to have some queries so that
# DNSServerFactory.allowQuery allows it.
message.queries = [None]
receivedMessages = []
def fakeHandler(message, protocol, address):
receivedMessages.append((message, protocol, address))
class FakeProtocol(object):
def writeMessage(self, message):
pass
protocol = FakeProtocol()
factory = server.DNSServerFactory(None)
setattr(factory, methodName, fakeHandler)
factory.messageReceived(message, protocol)
self.assertEqual(receivedMessages, [(message, protocol, None)])
def test_notifyMessageReceived(self):
"""
L{DNSServerFactory.messageReceived} passes messages with an opcode
of C{OP_NOTIFY} on to L{DNSServerFactory.handleNotify}.
"""
# RFC 1996, section 4.5
opCode = 4
self._messageReceivedTest('handleNotify', Message(opCode=opCode))
def test_updateMessageReceived(self):
"""
L{DNSServerFactory.messageReceived} passes messages with an opcode
of C{OP_UPDATE} on to L{DNSServerFactory.handleOther}.
This may change if the implementation ever covers update messages.
"""
# RFC 2136, section 1.3
opCode = 5
self._messageReceivedTest('handleOther', Message(opCode=opCode))
def test_connectionTracking(self):
"""
The C{connectionMade} and C{connectionLost} methods of
L{DNSServerFactory} cooperate to keep track of all
L{DNSProtocol} objects created by a factory which are
connected.
"""
protoA, protoB = object(), object()
factory = server.DNSServerFactory()
factory.connectionMade(protoA)
self.assertEqual(factory.connections, [protoA])
factory.connectionMade(protoB)
self.assertEqual(factory.connections, [protoA, protoB])
factory.connectionLost(protoA)
self.assertEqual(factory.connections, [protoB])
factory.connectionLost(protoB)
self.assertEqual(factory.connections, [])
class HelperTestCase(unittest.TestCase):
def testSerialGenerator(self):
f = self.mktemp()
a = authority.getSerial(f)
for i in range(20):
b = authority.getSerial(f)
self.failUnless(a < b)
a = b
class AXFRTest(unittest.TestCase):
def setUp(self):
self.results = None
self.d = defer.Deferred()
self.d.addCallback(self._gotResults)
self.controller = client.AXFRController('fooby.com', self.d)
self.soa = dns.RRHeader(name='fooby.com', type=dns.SOA, cls=dns.IN, ttl=86400, auth=False,
payload=dns.Record_SOA(mname='fooby.com',
rname='hooj.fooby.com',
serial=100,
refresh=200,
retry=300,
expire=400,
minimum=500,
ttl=600))
self.records = [
self.soa,
dns.RRHeader(name='fooby.com', type=dns.NS, cls=dns.IN, ttl=700, auth=False,
payload=dns.Record_NS(name='ns.twistedmatrix.com', ttl=700)),
dns.RRHeader(name='fooby.com', type=dns.MX, cls=dns.IN, ttl=700, auth=False,
payload=dns.Record_MX(preference=10, exchange='mail.mv3d.com', ttl=700)),
dns.RRHeader(name='fooby.com', type=dns.A, cls=dns.IN, ttl=700, auth=False,
payload=dns.Record_A(address='64.123.27.105', ttl=700)),
self.soa
]
def _makeMessage(self):
# hooray they all have the same message format
return dns.Message(id=999, answer=1, opCode=0, recDes=0, recAv=1, auth=1, rCode=0, trunc=0, maxSize=0)
def testBindAndTNamesStyle(self):
# Bind style = One big single message
m = self._makeMessage()
m.queries = [dns.Query('fooby.com', dns.AXFR, dns.IN)]
m.answers = self.records
self.controller.messageReceived(m, None)
self.assertEqual(self.results, self.records)
def _gotResults(self, result):
self.results = result
def testDJBStyle(self):
# DJB style = message per record
records = self.records[:]
while records:
m = self._makeMessage()
m.queries = [] # DJB *doesn't* specify any queries.. hmm..
m.answers = [records.pop(0)]
self.controller.messageReceived(m, None)
self.assertEqual(self.results, self.records)
class ResolvConfHandling(unittest.TestCase):
def testMissing(self):
resolvConf = self.mktemp()
r = client.Resolver(resolv=resolvConf)
self.assertEqual(r.dynServers, [('127.0.0.1', 53)])
r._parseCall.cancel()
def testEmpty(self):
resolvConf = self.mktemp()
fObj = file(resolvConf, 'w')
fObj.close()
r = client.Resolver(resolv=resolvConf)
self.assertEqual(r.dynServers, [('127.0.0.1', 53)])
r._parseCall.cancel()
class AuthorityTests(unittest.TestCase):
"""
Tests for the basic response record selection code in L{FileAuthority}
(independent of its fileness).
"""
def test_domainErrorForNameWithCommonSuffix(self):
"""
L{FileAuthority} lookup methods errback with L{DomainError} if
the requested C{name} shares a common suffix with its zone but
is not actually a descendant of its zone, in terms of its
sequence of DNS name labels. eg www.the-example.com has
nothing to do with the zone example.com.
"""
testDomain = test_domain_com
testDomainName = 'nonexistent.prefix-' + testDomain.soa[0]
f = self.failureResultOf(testDomain.lookupAddress(testDomainName))
self.assertIsInstance(f.value, DomainError)
def test_recordMissing(self):
"""
If a L{FileAuthority} has a zone which includes an I{NS} record for a
particular name and that authority is asked for another record for the
same name which does not exist, the I{NS} record is not included in the
authority section of the response.
"""
authority = NoFileAuthority(
soa=(str(soa_record.mname), soa_record),
records={
str(soa_record.mname): [
soa_record,
dns.Record_NS('1.2.3.4'),
]})
d = authority.lookupAddress(str(soa_record.mname))
result = []
d.addCallback(result.append)
answer, authority, additional = result[0]
self.assertEqual(answer, [])
self.assertEqual(
authority, [
dns.RRHeader(
str(soa_record.mname), soa_record.TYPE,
ttl=soa_record.expire, payload=soa_record,
auth=True)])
self.assertEqual(additional, [])
def _referralTest(self, method):
"""
Create an authority and make a request against it. Then verify that the
result is a referral, including no records in the answers or additional
sections, but with an I{NS} record in the authority section.
"""
subdomain = 'example.' + str(soa_record.mname)
nameserver = dns.Record_NS('1.2.3.4')
authority = NoFileAuthority(
soa=(str(soa_record.mname), soa_record),
records={
subdomain: [
nameserver,
]})
d = getattr(authority, method)(subdomain)
answer, authority, additional = self.successResultOf(d)
self.assertEqual(answer, [])
self.assertEqual(
authority, [dns.RRHeader(
subdomain, dns.NS, ttl=soa_record.expire,
payload=nameserver, auth=False)])
self.assertEqual(additional, [])
def test_referral(self):
"""
When an I{NS} record is found for a child zone, it is included in the
authority section of the response. It is marked as non-authoritative if
the authority is not also authoritative for the child zone (RFC 2181,
section 6.1).
"""
self._referralTest('lookupAddress')
def test_allRecordsReferral(self):
"""
A referral is also generated for a request of type C{ALL_RECORDS}.
"""
self._referralTest('lookupAllRecords')
class AdditionalProcessingTests(unittest.TestCase):
"""
Tests for L{FileAuthority}'s additional processing for those record types
which require it (MX, CNAME, etc).
"""
_A = dns.Record_A(b"10.0.0.1")
_AAAA = dns.Record_AAAA(b"f080::1")
def _lookupSomeRecords(self, method, soa, makeRecord, target, addresses):
"""
Perform a DNS lookup against a L{FileAuthority} configured with records
as defined by C{makeRecord} and C{addresses}.
@param method: The name of the lookup method to use; for example,
C{"lookupNameservers"}.
@type method: L{str}
@param soa: A L{Record_SOA} for the zone for which the L{FileAuthority}
is authoritative.
@param makeRecord: A one-argument callable which accepts a name and
returns an L{IRecord} provider. L{FileAuthority} is constructed
with this record. The L{FileAuthority} is queried for a record of
the resulting type with the given name.
@param target: The extra name which the record returned by
C{makeRecord} will be pointed at; this is the name which might
require extra processing by the server so that all the available,
useful information is returned. For example, this is the target of
a CNAME record or the mail exchange host pointed to by an MX record.
@type target: L{bytes}
@param addresses: A L{list} of records giving addresses of C{target}.
@return: A L{Deferred} that fires with the result of the resolver
method give by C{method}.
"""
authority = NoFileAuthority(
soa=(soa.mname.name, soa),
records={
soa.mname.name: [makeRecord(target)],
target: addresses,
},
)
return getattr(authority, method)(soa_record.mname.name)
def assertRecordsMatch(self, expected, computed):
"""
Assert that the L{RRHeader} instances given by C{expected} and
C{computed} carry all the same information but without requiring the
records appear in the same order.
@param expected: A L{list} of L{RRHeader} instances giving the expected
records.
@param computed: A L{list} of L{RRHeader} instances giving the records
computed by the scenario under test.
@raise self.failureException: If the two collections of records disagree.
"""
# RRHeader instances aren't inherently ordered. Impose an ordering
# that's good enough for the purposes of these tests - in which we
# never have more than one record of a particular type.
key = lambda rr: rr.type
self.assertEqual(sorted(expected, key=key), sorted(computed, key=key))
def _additionalTest(self, method, makeRecord, addresses):
"""
Verify that certain address records are included in the I{additional}
section of a response generated by L{FileAuthority}.
@param method: See L{_lookupSomeRecords}
@param makeRecord: See L{_lookupSomeRecords}
@param addresses: A L{list} of L{IRecord} providers which the
I{additional} section of the response is required to match
(ignoring order).
@raise self.failureException: If the I{additional} section of the
response consists of different records than those given by
C{addresses}.
"""
target = b"mail." + soa_record.mname.name
d = self._lookupSomeRecords(
method, soa_record, makeRecord, target, addresses)
answer, authority, additional = self.successResultOf(d)
self.assertRecordsMatch(
[dns.RRHeader(
target, address.TYPE, ttl=soa_record.expire, payload=address,
auth=True)
for address in addresses],
additional)
def _additionalMXTest(self, addresses):
"""
Verify that a response to an MX query has certain records in the
I{additional} section.
@param addresses: See C{_additionalTest}
"""
self._additionalTest(
"lookupMailExchange", partial(dns.Record_MX, 10), addresses)
def test_mailExchangeAdditionalA(self):
"""
If the name of the MX response has A records, they are included in the
additional section of the response.
"""
self._additionalMXTest([self._A])
def test_mailExchangeAdditionalAAAA(self):
"""
If the name of the MX response has AAAA records, they are included in
the additional section of the response.
"""
self._additionalMXTest([self._AAAA])
def test_mailExchangeAdditionalBoth(self):
"""
If the name of the MX response has both A and AAAA records, they are
all included in the additional section of the response.
"""
self._additionalMXTest([self._A, self._AAAA])
def _additionalNSTest(self, addresses):
"""
Verify that a response to an NS query has certain records in the
I{additional} section.
@param addresses: See C{_additionalTest}
"""
self._additionalTest(
"lookupNameservers", dns.Record_NS, addresses)
def test_nameserverAdditionalA(self):
"""
If the name of the NS response has A records, they are included in the
additional section of the response.
"""
self._additionalNSTest([self._A])
def test_nameserverAdditionalAAAA(self):
"""
If the name of the NS response has AAAA records, they are included in
the additional section of the response.
"""
self._additionalNSTest([self._AAAA])
def test_nameserverAdditionalBoth(self):
"""
If the name of the NS response has both A and AAAA records, they are
all included in the additional section of the response.
"""
self._additionalNSTest([self._A, self._AAAA])
def _answerCNAMETest(self, addresses):
"""
Verify that a response to a CNAME query has certain records in the
I{answer} section.
@param addresses: See C{_additionalTest}
"""
target = b"www." + soa_record.mname.name
d = self._lookupSomeRecords(
"lookupCanonicalName", soa_record, dns.Record_CNAME, target,
addresses)
answer, authority, additional = self.successResultOf(d)
alias = dns.RRHeader(
soa_record.mname.name, dns.CNAME, ttl=soa_record.expire,
payload=dns.Record_CNAME(target), auth=True)
self.assertRecordsMatch(
[dns.RRHeader(
target, address.TYPE, ttl=soa_record.expire, payload=address,
auth=True)
for address in addresses] + [alias],
answer)
def test_canonicalNameAnswerA(self):
"""
If the name of the CNAME response has A records, they are included in
the answer section of the response.
"""
self._answerCNAMETest([self._A])
def test_canonicalNameAnswerAAAA(self):
"""
If the name of the CNAME response has AAAA records, they are included
in the answer section of the response.
"""
self._answerCNAMETest([self._AAAA])
def test_canonicalNameAnswerBoth(self):
"""
If the name of the CNAME response has both A and AAAA records, they are
all included in the answer section of the response.
"""
self._answerCNAMETest([self._A, self._AAAA])
class NoInitialResponseTestCase(unittest.TestCase):
def test_no_answer(self):
"""
If a request returns a L{dns.NS} response, but we can't connect to the
given server, the request fails with the error returned at connection.
"""
def query(self, *args):
# Pop from the message list, so that it blows up if more queries
# are run than expected.
return succeed(messages.pop(0))
def queryProtocol(self, *args, **kwargs):
return defer.fail(socket.gaierror("Couldn't connect"))
resolver = Resolver(servers=[('0.0.0.0', 0)])
resolver._query = query
messages = []
# Let's patch dns.DNSDatagramProtocol.query, as there is no easy way to
# customize it.
self.patch(dns.DNSDatagramProtocol, "query", queryProtocol)
records = [
dns.RRHeader(name='fooba.com', type=dns.NS, cls=dns.IN, ttl=700,
auth=False,
payload=dns.Record_NS(name='ns.twistedmatrix.com',
ttl=700))]
m = dns.Message(id=999, answer=1, opCode=0, recDes=0, recAv=1, auth=1,
rCode=0, trunc=0, maxSize=0)
m.answers = records
messages.append(m)
return self.assertFailure(
resolver.getHostByName("fooby.com"), socket.gaierror)
class SecondaryAuthorityServiceTests(unittest.TestCase):
"""
Tests for L{SecondaryAuthorityService}, a service which keeps one or more
authorities up to date by doing zone transfers from a master.
"""
def test_constructAuthorityFromHost(self):
"""
L{SecondaryAuthorityService} can be constructed with a C{str} giving a
master server address and several domains, causing the creation of a
secondary authority for each domain and that master server address and
the default DNS port.
"""
primary = '192.168.1.2'
service = SecondaryAuthorityService(
primary, ['example.com', 'example.org'])
self.assertEqual(service.primary, primary)
self.assertEqual(service._port, 53)
self.assertEqual(service.domains[0].primary, primary)
self.assertEqual(service.domains[0]._port, 53)
self.assertEqual(service.domains[0].domain, 'example.com')
self.assertEqual(service.domains[1].primary, primary)
self.assertEqual(service.domains[1]._port, 53)
self.assertEqual(service.domains[1].domain, 'example.org')
def test_constructAuthorityFromHostAndPort(self):
"""
L{SecondaryAuthorityService.fromServerAddressAndDomains} constructs a
new L{SecondaryAuthorityService} from a C{str} giving a master server
address and DNS port and several domains, causing the creation of a secondary
authority for each domain and that master server address and the given
DNS port.
"""
primary = '192.168.1.3'
port = 5335
service = SecondaryAuthorityService.fromServerAddressAndDomains(
(primary, port), ['example.net', 'example.edu'])
self.assertEqual(service.primary, primary)
self.assertEqual(service._port, 5335)
self.assertEqual(service.domains[0].primary, primary)
self.assertEqual(service.domains[0]._port, port)
self.assertEqual(service.domains[0].domain, 'example.net')
self.assertEqual(service.domains[1].primary, primary)
self.assertEqual(service.domains[1]._port, port)
self.assertEqual(service.domains[1].domain, 'example.edu')
class SecondaryAuthorityTests(unittest.TestCase):
"""
L{twisted.names.secondary.SecondaryAuthority} correctly constructs objects
with a specified IP address and optionally specified DNS port.
"""
def test_defaultPort(self):
"""
When constructed using L{SecondaryAuthority.__init__}, the default port
of 53 is used.
"""
secondary = SecondaryAuthority('192.168.1.1', 'inside.com')
self.assertEqual(secondary.primary, '192.168.1.1')
self.assertEqual(secondary._port, 53)
self.assertEqual(secondary.domain, 'inside.com')
def test_explicitPort(self):
"""
When constructed using L{SecondaryAuthority.fromServerAddressAndDomain},
the specified port is used.
"""
secondary = SecondaryAuthority.fromServerAddressAndDomain(
('192.168.1.1', 5353), 'inside.com')
self.assertEqual(secondary.primary, '192.168.1.1')
self.assertEqual(secondary._port, 5353)
self.assertEqual(secondary.domain, 'inside.com')
def test_transfer(self):
"""
An attempt is made to transfer the zone for the domain the
L{SecondaryAuthority} was constructed with from the server address it
was constructed with when L{SecondaryAuthority.transfer} is called.
"""
secondary = SecondaryAuthority.fromServerAddressAndDomain(
('192.168.1.2', 1234), 'example.com')
secondary._reactor = reactor = MemoryReactorClock()
secondary.transfer()
# Verify a connection attempt to the server address above
host, port, factory, timeout, bindAddress = reactor.tcpClients.pop(0)
self.assertEqual(host, '192.168.1.2')
self.assertEqual(port, 1234)
# See if a zone transfer query is issued.
proto = factory.buildProtocol((host, port))
transport = StringTransport()
proto.makeConnection(transport)
msg = Message()
# DNSProtocol.writeMessage length encodes the message by prepending a
# 2 byte message length to the buffered value.
msg.decode(StringIO(transport.value()[2:]))
self.assertEqual(
[dns.Query('example.com', dns.AXFR, dns.IN)], msg.queries)
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