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
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
234
235
236
237
238
239
240
241
242
243
244
245
246
247
248
249
250
251
252
253
254
255
256
257
258
259
260
261
262
263
264
265
266
267
268
269
270
271
272
273
274
275
276
277
278
279
280
281
282
283
284
285
286
287
288
289
290
291
292
293
294
295
296
297
298
299
300
301
302
303
304
305
306
307
308
309
310
311
312
313
314
315
316
317
318
319
320
321
322
323
324
325
326
327
328
329
330
331
332
333
334
335
336
337
338
339
340
341
342
343
344
345
346
347
348
349
350
351
352
353
354
355
356
357
358
359
360
361
362
363
364
365
366
367
368
369
370
|
#!/usr/bin/env python
#
# Tests of the packet assembler/disassembler routines.
#
# only tests the simple packers for now. next is to test the
# classes: Hpacker/Hunpacker,
# Qpacker/Unpacker, then Mpacker/Munpacker
#
# Start doing unpleasant tests with broken data, truncations, that
# sort of thing.
import DNS
import unittest
TestCompleted = "TestCompleted" # exc.
class Int16Packing(unittest.TestCase):
knownValues = ( ( 10, '\x00\n'),
( 500, '\x01\xf4' ),
( 5340, '\x14\xdc' ),
( 51298, '\xc8b'),
( 65535, '\xff\xff'),
)
def test16bitPacking(self):
""" pack16bit should give known output for known input """
for i,s in self.knownValues:
result = DNS.Lib.pack16bit(i)
self.assertEqual(s,result)
def test16bitUnpacking(self):
""" unpack16bit should give known output for known input """
for i,s in self.knownValues:
result = DNS.Lib.unpack16bit(s)
self.assertEqual(i,result)
class Int32Packing(unittest.TestCase):
knownValues = ( ( 10, '\x00\x00\x00\n'),
( 500, '\x00\x00\x01\xf4' ),
( 5340, '\x00\x00\x14\xdc' ),
( 51298, '\x00\x00\xc8b'),
( 65535, '\x00\x00\xff\xff'),
( 33265535, '\x01\xfb\x97\x7f' ),
( 147483647, '\x08\xcak\xff' ),
( 2147483647, '\x7f\xff\xff\xff' ),
)
def test32bitPacking(self):
""" pack32bit should give known output for known input """
for i,s in self.knownValues:
result = DNS.Lib.pack32bit(i)
self.assertEqual(s,result)
def test32bitUnpacking(self):
""" unpack32bit should give known output for known input """
for i,s in self.knownValues:
result = DNS.Lib.unpack32bit(s)
self.assertEqual(i,result)
class IPaddrPacking(unittest.TestCase):
knownValues = (
('127.0.0.1', 2130706433 ),
('10.99.23.13', 174266125 ),
('192.35.59.45', -1071432915 ), # signed, sigh
('255.255.255.255', -1),
)
def testIPaddrPacking(self):
""" addr2bin should give known output for known input """
for i,s in self.knownValues:
result = DNS.Lib.addr2bin(i)
self.assertEqual(s,result)
def testIPaddrUnpacking(self):
""" bin2addr should give known output for known input """
for i,s in self.knownValues:
result = DNS.Lib.bin2addr(s)
self.assertEqual(i,result)
class PackerClassPacking(unittest.TestCase):
knownPackValues = [
( ['www.ekit.com'], '\x03www\x04ekit\x03com\x00' ),
( ['ns1.ekorp.com', 'ns2.ekorp.com', 'ns3.ekorp.com'],
'\x03ns1\x05ekorp\x03com\x00\x03ns2\xc0\x04\x03ns3\xc0\x04'),
( ['a.root-servers.net.', 'b.root-servers.net.',
'c.root-servers.net.', 'd.root-servers.net.',
'e.root-servers.net.', 'f.root-servers.net.'],
'\x01a\x0croot-servers\x03net\x00\x01b\xc0\x02\x01c\xc0'+
'\x02\x01d\xc0\x02\x01e\xc0\x02\x01f\xc0\x02' ),
]
knownUnpackValues = [
( ['www.ekit.com'], '\x03www\x04ekit\x03com\x00' ),
( ['ns1.ekorp.com', 'ns2.ekorp.com', 'ns3.ekorp.com'],
'\x03ns1\x05ekorp\x03com\x00\x03ns2\xc0\x04\x03ns3\xc0\x04'),
( ['a.root-servers.net', 'b.root-servers.net',
'c.root-servers.net', 'd.root-servers.net',
'e.root-servers.net', 'f.root-servers.net'],
'\x01a\x0croot-servers\x03net\x00\x01b\xc0\x02\x01c\xc0'+
'\x02\x01d\xc0\x02\x01e\xc0\x02\x01f\xc0\x02' ),
]
def testPackNames(self):
from DNS.Lib import Packer
for namelist,result in self.knownPackValues:
p = Packer()
for n in namelist:
p.addname(n)
self.assertEqual(p.getbuf(),result)
def testUnpackNames(self):
from DNS.Lib import Unpacker
for namelist,result in self.knownUnpackValues:
u = Unpacker(result)
names = []
for i in range(len(namelist)):
n = u.getname()
names.append(n)
self.assertEqual(names, namelist)
def testUnpackerLimitCheck(self):
from DNS.Lib import Unpacker
u=Unpacker('\x03ns1\x05ekorp\x03com\x00\x03ns2\xc0\x04\x03ns3\xc0\x04')
u.getname() ; u.getname() ; u.getname()
# 4th call should fail
self.assertRaises(IndexError, u.getname)
class testUnpackingMangled(unittest.TestCase):
"addA(self, name, klass, ttl, address)"
packerCorrect = '\x05www02\x04ekit\x03com\x00\x00\x01\x00\x01\x00\x01Q\x80\x00\x04\xc0\xa8\n\x02'
def testWithoutRR(self):
u = DNS.Lib.RRunpacker(self.packerCorrect)
u.getAdata()
def testWithTwoRRs(self):
u = DNS.Lib.RRunpacker(self.packerCorrect)
u.getRRheader()
self.assertRaises(DNS.Lib.UnpackError, u.getRRheader)
def testWithNoGetData(self):
u = DNS.Lib.RRunpacker(self.packerCorrect)
u.getRRheader()
self.assertRaises(DNS.Lib.UnpackError, u.endRR)
class PackerTestCase(unittest.TestCase):
" base class for tests of Packing code. Laziness on my part, I know. "
def testPacker(self):
from DNS.Lib import RRpacker
p = RRpacker()
check = self.doPack(p)
if (p is not None) and (check is not TestCompleted):
return self.checkPackResult(p)
def checkPackResult(self, buf):
if not hasattr(self, 'packerExpectedResult'):
if self.__class__.__name__ != 'PackerTestCase':
print "P***", self, repr(buf.getbuf()) #cheat testcase
else:
return self.assertEqual(buf.getbuf(),
self.packerExpectedResult)
def checkUnpackResult(self, rrbits, specbits):
if not hasattr(self, 'unpackerExpectedResult'):
if self.__class__.__name__ != 'PackerTestCase':
print "U***", self, repr((rrbits,specbits)) #cheat testcase
else:
return self.assertEqual((rrbits, specbits),
self.unpackerExpectedResult)
def testUnpacker(self):
from DNS.Lib import RRunpacker
if self.doUnpack is not None:
if hasattr(self.__class__, 'doUnpack') \
and hasattr(self, 'packerExpectedResult'):
u = RRunpacker(self.packerExpectedResult)
rrbits = u.getRRheader()[:4]
specbits = self.doUnpack(u)
try:
u.endRR()
except DNS.Lib.UnpackError:
self.assertEqual(0, 'Not at end of RR!')
return self.checkUnpackResult(rrbits, specbits)
else:
me = self.__class__.__name__
if me != 'PackerTestCase':
self.assertEquals(self.__class__.__name__,
'Unpack NotImplemented')
def doPack(self, p):
" stub. don't test the base class "
return None
def doUnpack(self, p):
" stub. don't test the base class "
return None
class testPackingOfCNAME(PackerTestCase):
"addCNAME(self, name, klass, ttl, cname)"
def doPack(self,p):
p.addCNAME('www.sub.domain', DNS.Class.IN, 3600, 'realhost.sub.domain')
def doUnpack(self, u):
return u.getCNAMEdata()
unpackerExpectedResult = (('www.sub.domain', DNS.Type.CNAME, DNS.Class.IN, 3600), 'realhost.sub.domain')
packerExpectedResult = \
'\x03www\x03sub\x06domain\x00\x00\x05\x00\x01\x00'+ \
'\x00\x0e\x10\x00\x0b\x08realhost\xc0\x04'
class testPackingOfCNAME2(PackerTestCase):
"addCNAME(self, name, klass, ttl, cname)"
def doPack(self,p):
p.addCNAME('www.cust.com', DNS.Class.IN, 200, 'www023.big.isp.com')
def doUnpack(self, u):
return u.getCNAMEdata()
unpackerExpectedResult = (('www.cust.com', DNS.Type.CNAME, DNS.Class.IN, 200), 'www023.big.isp.com')
packerExpectedResult = \
'\x03www\x04cust\x03com\x00\x00\x05\x00\x01\x00'+ \
'\x00\x00\xc8\x00\x11\x06www023\x03big\x03isp\xc0\t'
class testPackingOfCNAME3(PackerTestCase):
"addCNAME(self, name, klass, ttl, cname)"
def doPack(self,p):
p.addCNAME('www.fred.com', DNS.Class.IN, 86400, 'webhost.loa.com')
def doUnpack(self, u):
return u.getCNAMEdata()
unpackerExpectedResult = (('www.fred.com', DNS.Type.CNAME, DNS.Class.IN, 86400), 'webhost.loa.com')
packerExpectedResult = \
'\x03www\x04fred\x03com\x00\x00\x05\x00\x01\x00\x01Q'+ \
'\x80\x00\x0e\x07webhost\x03loa\xc0\t'
class testPackingOfHINFO(PackerTestCase):
"addHINFO(self, name, klass, ttl, cpu, os)"
def doPack(self,p):
p.addHINFO('www.sub.domain.com', DNS.Class.IN, 3600, 'i686', 'linux')
def doUnpack(self, u):
return u.getHINFOdata()
unpackerExpectedResult = (('www.sub.domain.com', 13, 1, 3600), ('i686', 'linux'))
packerExpectedResult = \
'\x03www\x03sub\x06domain\x03com\x00\x00\r\x00\x01'+ \
'\x00\x00\x0e\x10\x00\x0b\x04i686\x05linux'
class testPackingOfHINFO2(PackerTestCase):
"addHINFO(self, name, klass, ttl, cpu, os)"
def doPack(self,p):
p.addHINFO('core1.lax.foo.com', DNS.Class.IN, 3600, 'cisco', 'ios')
def doUnpack(self, u):
return u.getHINFOdata()
unpackerExpectedResult = (('core1.lax.foo.com', 13, 1, 3600), ('cisco', 'ios'))
packerExpectedResult = \
'\x05core1\x03lax\x03foo\x03com\x00\x00\r\x00\x01'+ \
'\x00\x00\x0e\x10\x00\n\x05cisco\x03ios'
class testPackingOfMX(PackerTestCase):
"addMX(self, name, klass, ttl, preference, exchange)"
def doPack(self, p):
p.addMX('sub.domain.com', DNS.Class.IN, 86400, 10, 'mailhost1.isp.com')
def doUnpack(self, u):
return u.getMXdata()
packerExpectedResult = \
'\x03sub\x06domain\x03com\x00\x00\x0f\x00\x01'+ \
'\x00\x01Q\x80\x00\x12\x00\n\tmailhost1\x03isp\xc0\x0b'
unpackerExpectedResult = (('sub.domain.com', 15, 1, 86400), (10, 'mailhost1.isp.com'))
class testPackingOfMX2(PackerTestCase):
"addMX(self, name, klass, ttl, preference, exchange)"
def doPack(self, p):
p.addMX('ekit-inc.com.', DNS.Class.IN, 86400, 10, 'mx1.ekorp.com')
p.addMX('ekit-inc.com.', DNS.Class.IN, 86400, 20, 'mx2.ekorp.com')
p.addMX('ekit-inc.com.', DNS.Class.IN, 86400, 30, 'mx3.ekorp.com')
def doUnpack(self, u):
res = [u.getMXdata(),]
dummy = u.getRRheader()[:4]
res += u.getMXdata()
dummy = u.getRRheader()[:4]
res += u.getMXdata()
return res
unpackerExpectedResult = (('ekit-inc.com', 15, 1, 86400), [(10, 'mx1.ekorp.com'), 20, 'mx2.ekorp.com', 30, 'mx3.ekorp.com'])
packerExpectedResult = \
'\x08ekit-inc\x03com\x00\x00\x0f\x00\x01\x00\x01Q\x80\x00'+\
'\x0e\x00\n\x03mx1\x05ekorp\xc0\t\x00\x00\x0f\x00\x01\x00'+\
'\x01Q\x80\x00\x08\x00\x14\x03mx2\xc0\x1e\x00\x00\x0f\x00'+\
'\x01\x00\x01Q\x80\x00\x08\x00\x1e\x03mx3\xc0\x1e'
class testPackingOfNS(PackerTestCase):
"addNS(self, name, klass, ttl, nsdname)"
def doPack(self, p):
p.addNS('ekit-inc.com', DNS.Class.IN, 86400, 'ns1.ekorp.com')
def doUnpack(self, u):
return u.getNSdata()
unpackerExpectedResult = (('ekit-inc.com', 2, 1, 86400), 'ns1.ekorp.com')
packerExpectedResult = '\x08ekit-inc\x03com\x00\x00\x02\x00\x01\x00\x01Q\x80\x00\x0c\x03ns1\x05ekorp\xc0\t'
class testPackingOfPTR(PackerTestCase):
"addPTR(self, name, klass, ttl, ptrdname)"
def doPack(self, p):
p.addPTR('www.ekit-inc.com', DNS.Class.IN, 3600, 'www-real01.ekorp.com')
def doUnpack(self, u):
return u.getPTRdata()
unpackerExpectedResult = (('www.ekit-inc.com', 12, 1, 3600), 'www-real01.ekorp.com')
packerExpectedResult = '\x03www\x08ekit-inc\x03com\x00\x00\x0c\x00\x01\x00\x00\x0e\x10\x00\x13\nwww-real01\x05ekorp\xc0\r'
class testPackingOfSOA(PackerTestCase):
"""addSOA(self, name, klass, ttl, mname,
rname, serial, refresh, retry, expire, minimum)"""
def doPack(self, p):
p.addSOA('ekit-inc.com', DNS.Class.IN, 3600, 'ns1.ekorp.com',
'hostmaster.ekit-inc.com', 2002020301, 100, 200, 300, 400)
def doUnpack(self, u):
return u.getSOAdata()
unpackerExpectedResult = (('ekit-inc.com', 6, 1, 3600), ('ns1.ekorp.com', 'hostmaster', ('serial', 2002020301), ('refresh ', 100, '1 minutes'), ('retry', 200, '3 minutes'), ('expire', 300, '5 minutes'), ('minimum', 400, '6 minutes')))
packerExpectedResult = '\x08ekit-inc\x03com\x00\x00\x06\x00\x01\x00\x00\x0e\x10\x00,\x03ns1\x05ekorp\xc0\t\nhostmaster\x00wTg\xcd\x00\x00\x00d\x00\x00\x00\xc8\x00\x00\x01,\x00\x00\x01\x90'
class testPackingOfA(PackerTestCase):
"addA(self, name, klass, ttl, address)"
def doPack(self, p):
p.addA('www02.ekit.com', DNS.Class.IN, 86400, '192.168.10.2')
def doUnpack(self, u):
return u.getAdata()
unpackerExpectedResult = (('www02.ekit.com', 1, 1, 86400), '192.168.10.2')
packerExpectedResult = '\x05www02\x04ekit\x03com\x00\x00\x01\x00\x01\x00\x01Q\x80\x00\x04\xc0\xa8\n\x02'
class testPackingOfA2(PackerTestCase):
"addA(self, name, ttl, address)"
def doPack(self, p):
p.addA('www.ekit.com', DNS.Class.IN, 86400, '10.98.1.0')
def doUnpack(self, u):
return u.getAdata()
unpackerExpectedResult = (('www.ekit.com', 1, 1, 86400), '10.98.1.0')
packerExpectedResult = '\x03www\x04ekit\x03com\x00\x00\x01\x00\x01\x00\x01Q\x80\x00\x04\nb\x01\x00'
class testPackingOfA3(PackerTestCase):
"addA(self, name, ttl, address)"
def doPack(self, p):
p.addA('www.zol.com', DNS.Class.IN, 86400, '192.168.10.4')
p.addA('www.zol.com', DNS.Class.IN, 86400, '192.168.10.3')
p.addA('www.zol.com', DNS.Class.IN, 86400, '192.168.10.2')
p.addA('www.zol.com', DNS.Class.IN, 86400, '192.168.10.1')
def doUnpack(self, u):
u1,d1,u2,d2,u3,d3,u4=u.getAdata(),u.getRRheader(),u.getAdata(),u.getRRheader(),u.getAdata(),u.getRRheader(),u.getAdata()
return u1,u2,u3,u4
unpackerExpectedResult = (('www.zol.com', 1, 1, 86400), ('192.168.10.4', '192.168.10.3', '192.168.10.2', '192.168.10.1'))
packerExpectedResult = '\x03www\x03zol\x03com\x00\x00\x01\x00\x01\x00\x01Q\x80\x00\x04\xc0\xa8\n\x04\x00\x00\x01\x00\x01\x00\x01Q\x80\x00\x04\xc0\xa8\n\x03\x00\x00\x01\x00\x01\x00\x01Q\x80\x00\x04\xc0\xa8\n\x02\x00\x00\x01\x00\x01\x00\x01Q\x80\x00\x04\xc0\xa8\n\x01'
class testPackingOfTXT(PackerTestCase):
"addTXT(self, name, klass, ttl, list)"
def doPack(self, p):
p.addTXT('ekit-inc.com', DNS.Class.IN, 3600, 'this is a text record')
def doUnpack(self, u):
return u.getTXTdata()
packerExpectedResult = '\x08ekit-inc\x03com\x00\x00\x10\x00\x01\x00\x00\x0e\x10\x00\x16\x15this is a text record'
unpackerExpectedResult = (('ekit-inc.com', 16, 1, 3600), ['this is a text record'])
# check what the maximum/minimum &c of TXT records are.
class testPackingOfTXT2(PackerTestCase):
"addTXT(self, name, klass, ttl, list)"
def doPack(self, p):
f = lambda p=p:p.addTXT('ekit-inc.com', DNS.Class.IN, 3600, 'the quick brown fox jumped over the lazy brown dog\n'*20)
self.assertRaises(ValueError, f)
return TestCompleted
doUnpack = None
#class testPackingOfQuestion(PackerTestCase):
# "addQuestion(self, qname, qtype, qclass)"
# def doPack(self, p):
# self.assertEquals(0,"NotImplemented")
if __name__ == "__main__":
unittest.main()
|
