projects / thirdparty / pdns.git / blame
| Commit | Line | Data |
|---|---|---|
| a620f197 RG |
1 | #!/usr/bin/env python |
| 2 | import threading | |
| 3 | import clientsubnetoption | |
| 4 | import dns | |
| 5 | from dnsdisttests import DNSDistTest | |
| 6 | ||
| 7 | def responseCallback(request): | |
| 8 | if len(request.question) != 1: | |
| 9 | print("Skipping query with question count %d" % (len(request.question))) | |
| 10 | return None | |
| 11 | healthCheck = str(request.question[0].name).endswith('a.root-servers.net.') | |
| 12 | if healthCheck: | |
| 13 | response = dns.message.make_response(request) | |
| 14 | return response.to_wire() | |
| 15 | # now we create a broken response | |
| 16 | response = dns.message.make_response(request) | |
| 17 | ecso = clientsubnetoption.ClientSubnetOption('127.0.0.1', 32) | |
| 18 | response.use_edns(edns=True, payload=4096, options=[ecso]) | |
| 19 | rrset = dns.rrset.from_text(request.question[0].name, | |
| 20 | 3600, | |
| 21 | dns.rdataclass.IN, | |
| 22 | dns.rdatatype.A, | |
| 23 | '127.0.0.1') | |
| 24 | response.answer.append(rrset) | |
| 25 | raw = response.to_wire() | |
| 26 | # first label length of this rrset is at 12 (dnsheader) + length(qname) + 2 (leading label length + trailing 0) + 2 (qtype) + 2 (qclass) | |
| 27 | offset = 12 + len(str(request.question[0].name)) + 2 + 2 + 2 | |
| 92643b6a | 28 | altered = raw[:offset] + b'\xff' + raw[offset+1:] |
| a620f197 RG |
29 | return altered |
| 30 | ||
| 31 | class TestBrokenAnswerECS(DNSDistTest): | |
| 32 | ||
| 33 | # this test suite uses a different responder port | |
| 34 | # because, contrary to the other ones, its | |
| 35 | # responders send raw, broken data | |
| 36 | _testServerPort = 5400 | |
| 37 | _config_template = """ | |
| 38 | setECSSourcePrefixV4(32) | |
| 39 | newServer{address="127.0.0.1:%s", useClientSubnet=true} | |
| 40 | """ | |
| 41 | @classmethod | |
| 42 | def startResponders(cls): | |
| 43 | print("Launching responders..") | |
| 44 | ||
| 45 | # Returns broken data for non-healthcheck queries | |
| 46 | cls._UDPResponder = threading.Thread(name='UDP Responder', target=cls.UDPResponder, args=[cls._testServerPort, cls._toResponderQueue, cls._fromResponderQueue, False, responseCallback]) | |
| 47 | cls._UDPResponder.setDaemon(True) | |
| 48 | cls._UDPResponder.start() | |
| 49 | ||
| 50 | # Returns broken data for non-healthcheck queries | |
| 51 | cls._TCPResponder = threading.Thread(name='TCP Responder', target=cls.TCPResponder, args=[cls._testServerPort, cls._toResponderQueue, cls._fromResponderQueue, False, False, responseCallback]) | |
| 52 | cls._TCPResponder.setDaemon(True) | |
| 53 | cls._TCPResponder.start() | |
| 54 | ||
| 55 | def testUDPWithInvalidAnswer(self): | |
| 56 | """ | |
| 57 | Broken Answer: Invalid UDP answer with ECS | |
| 58 | """ | |
| 59 | name = 'invalid-ecs-udp.broken-answer.tests.powerdns.com.' | |
| 60 | query = dns.message.make_query(name, 'A', 'IN') | |
| 61 | rrset = dns.rrset.from_text(name, | |
| 62 | 3600, | |
| 63 | dns.rdataclass.IN, | |
| 64 | dns.rdatatype.A, | |
| 65 | '127.0.0.1') | |
| 66 | expectedResponse = dns.message.make_response(query) | |
| 67 | expectedResponse.answer.append(rrset) | |
| 68 | ||
| 69 | (receivedQuery, receivedResponse) = self.sendUDPQuery(query, response=None, useQueue=False) | |
| 70 | self.assertFalse(receivedQuery) | |
| 71 | self.assertFalse(receivedResponse) | |
| 72 | ||
| 73 | (receivedQuery, receivedResponse) = self.sendUDPQuery(query, response=None, useQueue=False) | |
| 74 | self.assertFalse(receivedQuery) | |
| 75 | self.assertFalse(receivedResponse) | |
| 76 | ||
| 77 | def testTCPWithInvalidAnswer(self): | |
| 78 | """ | |
| 79 | Broken Answer: Invalid TCP answer with ECS | |
| 80 | """ | |
| 81 | name = 'invalid-ecs-tcp.broken-answer.tests.powerdns.com.' | |
| 82 | query = dns.message.make_query(name, 'A', 'IN') | |
| 83 | rrset = dns.rrset.from_text(name, | |
| 84 | 3600, | |
| 85 | dns.rdataclass.IN, | |
| 86 | dns.rdatatype.A, | |
| 87 | '127.0.0.1') | |
| 88 | expectedResponse = dns.message.make_response(query) | |
| 89 | expectedResponse.answer.append(rrset) | |
| 90 | ||
| 91 | (receivedQuery, receivedResponse) = self.sendTCPQuery(query, response=None, useQueue=False) | |
| 92 | self.assertFalse(receivedQuery) | |
| 93 | self.assertFalse(receivedResponse) | |
| 94 | ||
| 95 | (receivedQuery, receivedResponse) = self.sendTCPQuery(query, response=None, useQueue=False) | |
| 96 | self.assertFalse(receivedQuery) | |
| 97 | self.assertFalse(receivedResponse) |