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1 | #!/usr/bin/env python |
2 | import unittest | |
3 | import dns | |
4 | import clientsubnetoption | |
5 | from dnsdisttests import DNSDistTest | |
6 | ||
7 | class TestBasics(DNSDistTest): | |
8 | ||
9 | _config_template = """ | |
10 | newServer{address="127.0.0.1:%s"} | |
11 | ||
12 | function lol(dq) | |
13 | return DNSAction.None, "" | |
14 | end | |
15 | addAction(AllRule(), LuaAction(lol)) | |
16 | ||
17 | addAction("tag-me-dns-1.tags.tests.powerdns.com.", TagAction("dns", "value1")) | |
18 | addAction("tag-me-dns-2.tags.tests.powerdns.com.", TagAction("dns", "value2")) | |
19 | addAction("tag-me-response-1.tags.tests.powerdns.com.", TagAction("response", "value1")) | |
20 | addAction("tag-me-response-2.tags.tests.powerdns.com.", TagAction("response", "value2")) | |
21 | ||
22 | addAction(TagRule("not-dns"), SpoofAction("1.2.3.4")) | |
23 | addAction(TagRule("dns", "value1"), SpoofAction("1.2.3.50")) | |
24 | addAction(TagRule("dns"), SpoofAction("1.2.3.100")) | |
25 | ||
26 | function responseHandlerSetTC(dr) | |
27 | dr.dh:setTC(true) | |
28 | return DNSResponseAction.HeaderModify, "" | |
29 | end | |
30 | ||
31 | function responseHandlerUnsetQR(dr) | |
32 | dr.dh:setQR(false) | |
33 | return DNSResponseAction.HeaderModify, "" | |
34 | end | |
35 | ||
36 | addResponseAction(TagRule("not-dns"), DropResponseAction()) | |
37 | addResponseAction(TagRule("response", "value1"), LuaResponseAction(responseHandlerSetTC)) | |
38 | addResponseAction(TagRule("response", "no-match-value"), DropResponseAction()) | |
39 | ||
40 | addResponseAction("tag-me-response-3.tags.tests.powerdns.com.", TagResponseAction("response-tag", "value")) | |
41 | addResponseAction(TagRule("response-tag"), LuaResponseAction(responseHandlerUnsetQR)) | |
42 | """ | |
43 | ||
44 | def testQuestionNoTag(self): | |
45 | """ | |
46 | Tag: No match | |
47 | """ | |
48 | name = 'no-match.tags.tests.powerdns.com.' | |
49 | query = dns.message.make_query(name, 'A', 'IN') | |
50 | response = dns.message.make_response(query) | |
51 | rrset = dns.rrset.from_text(name, | |
52 | 3600, | |
53 | dns.rdataclass.IN, | |
54 | dns.rdatatype.A, | |
55 | '127.0.0.1') | |
56 | response.answer.append(rrset) | |
57 | ||
58 | (receivedQuery, receivedResponse) = self.sendUDPQuery(query, response) | |
59 | self.assertTrue(receivedQuery) | |
60 | self.assertTrue(receivedResponse) | |
61 | receivedQuery.id = query.id | |
62 | self.assertEquals(query, receivedQuery) | |
63 | self.assertEquals(response, receivedResponse) | |
64 | ||
65 | (receivedQuery, receivedResponse) = self.sendTCPQuery(query, response) | |
66 | self.assertTrue(receivedQuery) | |
67 | self.assertTrue(receivedResponse) | |
68 | receivedQuery.id = query.id | |
69 | self.assertEquals(query, receivedQuery) | |
70 | self.assertEquals(response, receivedResponse) | |
71 | ||
72 | def testQuestionMatchTagAndValue(self): | |
73 | """ | |
74 | Tag: Name and value match | |
75 | """ | |
76 | name = 'tag-me-dns-1.tags.tests.powerdns.com.' | |
77 | query = dns.message.make_query(name, 'A', 'IN') | |
78 | # dnsdist set RA = RD for spoofed responses | |
79 | query.flags &= ~dns.flags.RD | |
80 | expectedResponse = dns.message.make_response(query) | |
81 | rrset = dns.rrset.from_text(name, | |
82 | 60, | |
83 | dns.rdataclass.IN, | |
84 | dns.rdatatype.A, | |
85 | '1.2.3.50') | |
86 | expectedResponse.answer.append(rrset) | |
87 | ||
88 | (_, receivedResponse) = self.sendUDPQuery(query, response=None, useQueue=False) | |
89 | self.assertTrue(receivedResponse) | |
90 | self.assertEquals(expectedResponse, receivedResponse) | |
91 | ||
92 | (_, receivedResponse) = self.sendTCPQuery(query, response=None, useQueue=False) | |
93 | self.assertTrue(receivedResponse) | |
94 | self.assertEquals(expectedResponse, receivedResponse) | |
95 | ||
96 | def testQuestionMatchTagOnly(self): | |
97 | """ | |
98 | Tag: Name matches | |
99 | """ | |
100 | name = 'tag-me-dns-2.tags.tests.powerdns.com.' | |
101 | query = dns.message.make_query(name, 'A', 'IN') | |
102 | # dnsdist set RA = RD for spoofed responses | |
103 | query.flags &= ~dns.flags.RD | |
104 | expectedResponse = dns.message.make_response(query) | |
105 | rrset = dns.rrset.from_text(name, | |
106 | 60, | |
107 | dns.rdataclass.IN, | |
108 | dns.rdatatype.A, | |
109 | '1.2.3.100') | |
110 | expectedResponse.answer.append(rrset) | |
111 | ||
112 | (_, receivedResponse) = self.sendUDPQuery(query, response=None, useQueue=False) | |
113 | self.assertTrue(receivedResponse) | |
114 | self.assertEquals(expectedResponse, receivedResponse) | |
115 | ||
116 | (_, receivedResponse) = self.sendTCPQuery(query, response=None, useQueue=False) | |
117 | self.assertTrue(receivedResponse) | |
118 | self.assertEquals(expectedResponse, receivedResponse) | |
119 | ||
120 | def testResponseNoMatch(self): | |
121 | """ | |
122 | Tag: Tag set on query does not match anything | |
123 | """ | |
124 | name = 'tag-me-response-2.tags.tests.powerdns.com.' | |
125 | query = dns.message.make_query(name, 'A', 'IN') | |
126 | response = dns.message.make_response(query) | |
127 | rrset = dns.rrset.from_text(name, | |
128 | 60, | |
129 | dns.rdataclass.IN, | |
130 | dns.rdatatype.A, | |
131 | '192.0.2.1') | |
132 | response.answer.append(rrset) | |
133 | ||
134 | (receivedQuery, receivedResponse) = self.sendUDPQuery(query, response) | |
135 | self.assertTrue(receivedQuery) | |
136 | self.assertTrue(receivedResponse) | |
137 | receivedQuery.id = query.id | |
138 | self.assertEquals(query, receivedQuery) | |
139 | self.assertEquals(response, receivedResponse) | |
140 | ||
141 | (receivedQuery, receivedResponse) = self.sendTCPQuery(query, response) | |
142 | self.assertTrue(receivedQuery) | |
143 | self.assertTrue(receivedResponse) | |
144 | receivedQuery.id = query.id | |
145 | self.assertEquals(query, receivedQuery) | |
146 | self.assertEquals(response, receivedResponse) | |
147 | ||
148 | def testResponseMatchTagAndValue(self): | |
149 | """ | |
150 | Tag: Tag and value set on query matches on response | |
151 | """ | |
152 | name = 'tag-me-response-1.tags.tests.powerdns.com.' | |
153 | query = dns.message.make_query(name, 'A', 'IN') | |
154 | # dnsdist set RA = RD for spoofed responses | |
155 | query.flags &= ~dns.flags.RD | |
156 | response = dns.message.make_response(query) | |
157 | rrset = dns.rrset.from_text(name, | |
158 | 60, | |
159 | dns.rdataclass.IN, | |
160 | dns.rdatatype.A, | |
161 | '1.2.3.100') | |
162 | response.answer.append(rrset) | |
163 | expectedResponse = dns.message.make_response(query) | |
164 | expectedResponse.answer.append(rrset) | |
165 | # we will set TC if the tag matches | |
166 | expectedResponse.flags |= dns.flags.TC | |
167 | ||
168 | (receivedQuery, receivedResponse) = self.sendUDPQuery(query, response) | |
169 | self.assertTrue(receivedQuery) | |
170 | self.assertTrue(receivedResponse) | |
171 | receivedQuery.id = query.id | |
172 | self.assertEquals(query, receivedQuery) | |
173 | print(expectedResponse) | |
174 | print(receivedResponse) | |
175 | self.assertEquals(expectedResponse, receivedResponse) | |
176 | ||
177 | (receivedQuery, receivedResponse) = self.sendTCPQuery(query, response) | |
178 | self.assertTrue(receivedQuery) | |
179 | self.assertTrue(receivedResponse) | |
180 | receivedQuery.id = query.id | |
181 | self.assertEquals(query, receivedQuery) | |
182 | self.assertEquals(expectedResponse, receivedResponse) | |
183 | ||
184 | def testResponseMatchResponseTagMatches(self): | |
185 | """ | |
186 | Tag: Tag set on response matches | |
187 | """ | |
188 | name = 'tag-me-response-3.tags.tests.powerdns.com.' | |
189 | query = dns.message.make_query(name, 'A', 'IN') | |
190 | # dnsdist set RA = RD for spoofed responses | |
191 | query.flags &= ~dns.flags.RD | |
192 | response = dns.message.make_response(query) | |
193 | rrset = dns.rrset.from_text(name, | |
194 | 60, | |
195 | dns.rdataclass.IN, | |
196 | dns.rdatatype.A, | |
197 | '1.2.3.100') | |
198 | response.answer.append(rrset) | |
199 | expectedResponse = dns.message.make_response(query) | |
200 | expectedResponse.answer.append(rrset) | |
201 | # we will set QR=0 if the tag matches | |
202 | expectedResponse.flags &= ~dns.flags.QR | |
203 | ||
204 | (receivedQuery, receivedResponse) = self.sendUDPQuery(query, response) | |
205 | self.assertTrue(receivedQuery) | |
206 | self.assertTrue(receivedResponse) | |
207 | receivedQuery.id = query.id | |
208 | self.assertEquals(query, receivedQuery) | |
209 | self.assertEquals(expectedResponse, receivedResponse) | |
210 | ||
211 | (receivedQuery, receivedResponse) = self.sendTCPQuery(query, response) | |
212 | self.assertTrue(receivedQuery) | |
213 | self.assertTrue(receivedResponse) | |
214 | receivedQuery.id = query.id | |
215 | self.assertEquals(query, receivedQuery) | |
216 | self.assertEquals(expectedResponse, receivedResponse) |