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
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
|
# Copyright (C) Dnspython Contributors, see LICENSE for text of ISC license
# Copyright (C) 2003-2017 Nominum, Inc.
#
# Permission to use, copy, modify, and distribute this software and its
# documentation for any purpose with or without fee is hereby granted,
# provided that the above copyright notice and this permission notice
# appear in all copies.
#
# THE SOFTWARE IS PROVIDED "AS IS" AND NOMINUM DISCLAIMS ALL WARRANTIES
# WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
# MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL NOMINUM BE LIABLE FOR
# ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
# WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
# ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT
# OF OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
import socket
import unittest
try:
import ssl
have_ssl = True
except Exception:
have_ssl = False
import dns.message
import dns.name
import dns.rdataclass
import dns.rdatatype
import dns.query
# Some tests require the internet to be available to run, so let's
# skip those if it's not there.
_network_available = True
try:
socket.gethostbyname('dnspython.org')
except socket.gaierror:
_network_available = False
@unittest.skipIf(not _network_available, "Internet not reachable")
class QueryTests(unittest.TestCase):
def testQueryUDP(self):
qname = dns.name.from_text('dns.google.')
q = dns.message.make_query(qname, dns.rdatatype.A)
response = dns.query.udp(q, '8.8.8.8')
rrs = response.get_rrset(response.answer, qname,
dns.rdataclass.IN, dns.rdatatype.A)
self.assertTrue(rrs is not None)
seen = set([rdata.address for rdata in rrs])
self.assertTrue('8.8.8.8' in seen)
self.assertTrue('8.8.4.4' in seen)
def testQueryUDPWithSocket(self):
with socket.socket(socket.AF_INET, socket.SOCK_DGRAM) as s:
s.setblocking(0)
qname = dns.name.from_text('dns.google.')
q = dns.message.make_query(qname, dns.rdatatype.A)
response = dns.query.udp(q, '8.8.8.8', sock=s)
rrs = response.get_rrset(response.answer, qname,
dns.rdataclass.IN, dns.rdatatype.A)
self.assertTrue(rrs is not None)
seen = set([rdata.address for rdata in rrs])
self.assertTrue('8.8.8.8' in seen)
self.assertTrue('8.8.4.4' in seen)
def testQueryTCP(self):
qname = dns.name.from_text('dns.google.')
q = dns.message.make_query(qname, dns.rdatatype.A)
response = dns.query.tcp(q, '8.8.8.8')
rrs = response.get_rrset(response.answer, qname,
dns.rdataclass.IN, dns.rdatatype.A)
self.assertTrue(rrs is not None)
seen = set([rdata.address for rdata in rrs])
self.assertTrue('8.8.8.8' in seen)
self.assertTrue('8.8.4.4' in seen)
def testQueryTCPWithSocket(self):
with socket.socket(socket.AF_INET, socket.SOCK_STREAM) as s:
s.connect(('8.8.8.8', 53))
s.setblocking(0)
qname = dns.name.from_text('dns.google.')
q = dns.message.make_query(qname, dns.rdatatype.A)
response = dns.query.tcp(q, None, sock=s)
rrs = response.get_rrset(response.answer, qname,
dns.rdataclass.IN, dns.rdatatype.A)
self.assertTrue(rrs is not None)
seen = set([rdata.address for rdata in rrs])
self.assertTrue('8.8.8.8' in seen)
self.assertTrue('8.8.4.4' in seen)
def testQueryTLS(self):
qname = dns.name.from_text('dns.google.')
q = dns.message.make_query(qname, dns.rdatatype.A)
response = dns.query.tls(q, '8.8.8.8')
rrs = response.get_rrset(response.answer, qname,
dns.rdataclass.IN, dns.rdatatype.A)
self.assertTrue(rrs is not None)
seen = set([rdata.address for rdata in rrs])
self.assertTrue('8.8.8.8' in seen)
self.assertTrue('8.8.4.4' in seen)
@unittest.skipUnless(have_ssl, "No SSL support")
def testQueryTLSWithSocket(self):
with socket.socket(socket.AF_INET, socket.SOCK_STREAM) as base_s:
base_s.connect(('8.8.8.8', 853))
ctx = ssl.create_default_context()
with ctx.wrap_socket(base_s, server_hostname='dns.google') as s:
s.setblocking(0)
qname = dns.name.from_text('dns.google.')
q = dns.message.make_query(qname, dns.rdatatype.A)
response = dns.query.tls(q, None, sock=s)
rrs = response.get_rrset(response.answer, qname,
dns.rdataclass.IN, dns.rdatatype.A)
self.assertTrue(rrs is not None)
seen = set([rdata.address for rdata in rrs])
self.assertTrue('8.8.8.8' in seen)
self.assertTrue('8.8.4.4' in seen)
def testQueryUDPFallback(self):
qname = dns.name.from_text('.')
q = dns.message.make_query(qname, dns.rdatatype.DNSKEY)
(_, tcp) = dns.query.udp_with_fallback(q, '8.8.8.8')
self.assertTrue(tcp)
def testQueryUDPFallbackWithSocket(self):
with socket.socket(socket.AF_INET, socket.SOCK_DGRAM) as udp_s:
udp_s.setblocking(0)
with socket.socket(socket.AF_INET, socket.SOCK_STREAM) as tcp_s:
tcp_s.connect(('8.8.8.8', 53))
tcp_s.setblocking(0)
qname = dns.name.from_text('.')
q = dns.message.make_query(qname, dns.rdatatype.DNSKEY)
(_, tcp) = dns.query.udp_with_fallback(q, '8.8.8.8',
udp_sock=udp_s,
tcp_sock=tcp_s)
self.assertTrue(tcp)
def testQueryUDPFallbackNoFallback(self):
qname = dns.name.from_text('dns.google.')
q = dns.message.make_query(qname, dns.rdatatype.A)
(_, tcp) = dns.query.udp_with_fallback(q, '8.8.8.8')
self.assertFalse(tcp)
|
