1 /* MIT License
2 *
3 * Copyright (c) The c-ares project and its contributors
4 *
5 * Permission is hereby granted, free of charge, to any person obtaining a copy
6 * of this software and associated documentation files (the "Software"), to deal
7 * in the Software without restriction, including without limitation the rights
8 * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
9 * copies of the Software, and to permit persons to whom the Software is
10 * furnished to do so, subject to the following conditions:
11 *
12 * The above copyright notice and this permission notice (including the next
13 * paragraph) shall be included in all copies or substantial portions of the
14 * Software.
15 *
16 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
17 * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
18 * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
19 * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
20 * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
21 * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
22 * SOFTWARE.
23 *
24 * SPDX-License-Identifier: MIT
25 */
26 #include "ares-test.h"
27 #include "dns-proto.h"
28
29 #include <sstream>
30 #include <vector>
31
32 namespace ares {
33 namespace test {
34
TEST_F(LibraryTest,ParseSrvReplyOK)35 TEST_F(LibraryTest, ParseSrvReplyOK) {
36 DNSPacket pkt;
37 pkt.set_qid(0x1234).set_response().set_aa()
38 .add_question(new DNSQuestion("example.com", T_SRV))
39 .add_answer(new DNSSrvRR("example.com", 100, 10, 20, 30, "srv.example.com"))
40 .add_answer(new DNSSrvRR("example.com", 100, 11, 21, 31, "srv2.example.com"));
41 std::vector<byte> data = pkt.data();
42
43 struct ares_srv_reply* srv = nullptr;
44 EXPECT_EQ(ARES_SUCCESS, ares_parse_srv_reply(data.data(), (int)data.size(), &srv));
45 ASSERT_NE(nullptr, srv);
46
47 EXPECT_EQ("srv.example.com", std::string(srv->host));
48 EXPECT_EQ(10, srv->priority);
49 EXPECT_EQ(20, srv->weight);
50 EXPECT_EQ(30, srv->port);
51
52 struct ares_srv_reply* srv2 = srv->next;
53 ASSERT_NE(nullptr, srv2);
54 EXPECT_EQ("srv2.example.com", std::string(srv2->host));
55 EXPECT_EQ(11, srv2->priority);
56 EXPECT_EQ(21, srv2->weight);
57 EXPECT_EQ(31, srv2->port);
58 EXPECT_EQ(nullptr, srv2->next);
59
60 ares_free_data(srv);
61 }
62
TEST_F(LibraryTest,ParseSrvReplySingle)63 TEST_F(LibraryTest, ParseSrvReplySingle) {
64 DNSPacket pkt;
65 pkt.set_qid(0x1234).set_response().set_aa()
66 .add_question(new DNSQuestion("example.abc.def.com", T_SRV))
67 .add_answer(new DNSSrvRR("example.abc.def.com", 180, 0, 10, 8160, "example.abc.def.com"))
68 .add_auth(new DNSNsRR("abc.def.com", 44, "else1.where.com"))
69 .add_auth(new DNSNsRR("abc.def.com", 44, "else2.where.com"))
70 .add_auth(new DNSNsRR("abc.def.com", 44, "else3.where.com"))
71 .add_auth(new DNSNsRR("abc.def.com", 44, "else4.where.com"))
72 .add_auth(new DNSNsRR("abc.def.com", 44, "else5.where.com"))
73 .add_additional(new DNSARR("else2.where.com", 42, {172,19,0,1}))
74 .add_additional(new DNSARR("else5.where.com", 42, {172,19,0,2}));
75 std::vector<byte> data = pkt.data();
76
77 struct ares_srv_reply* srv = nullptr;
78 EXPECT_EQ(ARES_SUCCESS, ares_parse_srv_reply(data.data(), (int)data.size(), &srv));
79 ASSERT_NE(nullptr, srv);
80
81 EXPECT_EQ("example.abc.def.com", std::string(srv->host));
82 EXPECT_EQ(0, srv->priority);
83 EXPECT_EQ(10, srv->weight);
84 EXPECT_EQ(8160, srv->port);
85 EXPECT_EQ(nullptr, srv->next);
86
87 ares_free_data(srv);
88 }
89
TEST_F(LibraryTest,ParseSrvReplyMalformed)90 TEST_F(LibraryTest, ParseSrvReplyMalformed) {
91 std::vector<byte> data = {
92 0x12, 0x34, // qid
93 0x84, // response + query + AA + not-TC + not-RD
94 0x00, // not-RA + not-Z + not-AD + not-CD + rc=NoError
95 0x00, 0x01, // num questions
96 0x00, 0x01, // num answer RRs
97 0x00, 0x00, // num authority RRs
98 0x00, 0x00, // num additional RRs
99 // Question
100 0x07, 'e', 'x', 'a', 'm', 'p', 'l', 'e',
101 0x03, 'c', 'o', 'm',
102 0x00,
103 0x00, 0x21, // type SRV
104 0x00, 0x01, // class IN
105 // Answer 1
106 0x07, 'e', 'x', 'a', 'm', 'p', 'l', 'e',
107 0x03, 'c', 'o', 'm',
108 0x00,
109 0x00, 0x21, // RR type
110 0x00, 0x01, // class IN
111 0x01, 0x02, 0x03, 0x04, // TTL
112 0x00, 0x04, // rdata length -- too short
113 0x02, 0x03, 0x04, 0x05,
114 };
115
116 struct ares_srv_reply* srv = nullptr;
117 EXPECT_EQ(ARES_EBADRESP, ares_parse_srv_reply(data.data(), (int)data.size(), &srv));
118 ASSERT_EQ(nullptr, srv);
119 }
120
TEST_F(LibraryTest,ParseSrvReplyMultiple)121 TEST_F(LibraryTest, ParseSrvReplyMultiple) {
122 DNSPacket pkt;
123 pkt.set_qid(0x1234).set_response().set_ra().set_rd()
124 .add_question(new DNSQuestion("srv.example.com", T_SRV))
125 .add_answer(new DNSSrvRR("srv.example.com", 300, 0, 5, 6789, "a1.srv.example.com"))
126 .add_answer(new DNSSrvRR("srv.example.com", 300, 0, 5, 4567, "a2.srv.example.com"))
127 .add_answer(new DNSSrvRR("srv.example.com", 300, 0, 5, 5678, "a3.srv.example.com"))
128 .add_auth(new DNSNsRR("example.com", 300, "ns1.example.com"))
129 .add_auth(new DNSNsRR("example.com", 300, "ns2.example.com"))
130 .add_auth(new DNSNsRR("example.com", 300, "ns3.example.com"))
131 .add_additional(new DNSARR("a1.srv.example.com", 300, {172,19,1,1}))
132 .add_additional(new DNSARR("a2.srv.example.com", 300, {172,19,1,2}))
133 .add_additional(new DNSARR("a3.srv.example.com", 300, {172,19,1,3}))
134 .add_additional(new DNSARR("n1.example.com", 300, {172,19,0,1}))
135 .add_additional(new DNSARR("n2.example.com", 300, {172,19,0,2}))
136 .add_additional(new DNSARR("n3.example.com", 300, {172,19,0,3}));
137 std::vector<byte> data = pkt.data();
138
139 struct ares_srv_reply* srv0 = nullptr;
140 EXPECT_EQ(ARES_SUCCESS, ares_parse_srv_reply(data.data(), (int)data.size(), &srv0));
141 ASSERT_NE(nullptr, srv0);
142 struct ares_srv_reply* srv = srv0;
143
144 EXPECT_EQ("a1.srv.example.com", std::string(srv->host));
145 EXPECT_EQ(0, srv->priority);
146 EXPECT_EQ(5, srv->weight);
147 EXPECT_EQ(6789, srv->port);
148 EXPECT_NE(nullptr, srv->next);
149 srv = srv->next;
150
151 EXPECT_EQ("a2.srv.example.com", std::string(srv->host));
152 EXPECT_EQ(0, srv->priority);
153 EXPECT_EQ(5, srv->weight);
154 EXPECT_EQ(4567, srv->port);
155 EXPECT_NE(nullptr, srv->next);
156 srv = srv->next;
157
158 EXPECT_EQ("a3.srv.example.com", std::string(srv->host));
159 EXPECT_EQ(0, srv->priority);
160 EXPECT_EQ(5, srv->weight);
161 EXPECT_EQ(5678, srv->port);
162 EXPECT_EQ(nullptr, srv->next);
163
164 ares_free_data(srv0);
165 }
166
TEST_F(LibraryTest,ParseSrvReplyCname)167 TEST_F(LibraryTest, ParseSrvReplyCname) {
168 DNSPacket pkt;
169 pkt.set_qid(0x1234).set_response().set_aa()
170 .add_question(new DNSQuestion("example.abc.def.com", T_SRV))
171 .add_answer(new DNSCnameRR("example.abc.def.com", 300, "cname.abc.def.com"))
172 .add_answer(new DNSSrvRR("cname.abc.def.com", 300, 0, 10, 1234, "srv.abc.def.com"))
173 .add_auth(new DNSNsRR("abc.def.com", 44, "else1.where.com"))
174 .add_auth(new DNSNsRR("abc.def.com", 44, "else2.where.com"))
175 .add_auth(new DNSNsRR("abc.def.com", 44, "else3.where.com"))
176 .add_additional(new DNSARR("example.abc.def.com", 300, {172,19,0,1}))
177 .add_additional(new DNSARR("else1.where.com", 42, {172,19,0,1}))
178 .add_additional(new DNSARR("else2.where.com", 42, {172,19,0,2}))
179 .add_additional(new DNSARR("else3.where.com", 42, {172,19,0,3}));
180 std::vector<byte> data = pkt.data();
181
182 struct ares_srv_reply* srv = nullptr;
183 EXPECT_EQ(ARES_SUCCESS, ares_parse_srv_reply(data.data(), (int)data.size(), &srv));
184 ASSERT_NE(nullptr, srv);
185
186 EXPECT_EQ("srv.abc.def.com", std::string(srv->host));
187 EXPECT_EQ(0, srv->priority);
188 EXPECT_EQ(10, srv->weight);
189 EXPECT_EQ(1234, srv->port);
190 EXPECT_EQ(nullptr, srv->next);
191
192 ares_free_data(srv);
193 }
194
TEST_F(LibraryTest,ParseSrvReplyCnameMultiple)195 TEST_F(LibraryTest, ParseSrvReplyCnameMultiple) {
196 DNSPacket pkt;
197 pkt.set_qid(0x1234).set_response().set_ra().set_rd()
198 .add_question(new DNSQuestion("query.example.com", T_SRV))
199 .add_answer(new DNSCnameRR("query.example.com", 300, "srv.example.com"))
200 .add_answer(new DNSSrvRR("srv.example.com", 300, 0, 5, 6789, "a1.srv.example.com"))
201 .add_answer(new DNSSrvRR("srv.example.com", 300, 0, 5, 4567, "a2.srv.example.com"))
202 .add_answer(new DNSSrvRR("srv.example.com", 300, 0, 5, 5678, "a3.srv.example.com"))
203 .add_auth(new DNSNsRR("example.com", 300, "ns1.example.com"))
204 .add_auth(new DNSNsRR("example.com", 300, "ns2.example.com"))
205 .add_auth(new DNSNsRR("example.com", 300, "ns3.example.com"))
206 .add_additional(new DNSARR("a1.srv.example.com", 300, {172,19,1,1}))
207 .add_additional(new DNSARR("a2.srv.example.com", 300, {172,19,1,2}))
208 .add_additional(new DNSARR("a3.srv.example.com", 300, {172,19,1,3}))
209 .add_additional(new DNSARR("n1.example.com", 300, {172,19,0,1}))
210 .add_additional(new DNSARR("n2.example.com", 300, {172,19,0,2}))
211 .add_additional(new DNSARR("n3.example.com", 300, {172,19,0,3}));
212 std::vector<byte> data = pkt.data();
213
214 struct ares_srv_reply* srv0 = nullptr;
215 EXPECT_EQ(ARES_SUCCESS, ares_parse_srv_reply(data.data(), (int)data.size(), &srv0));
216 ASSERT_NE(nullptr, srv0);
217 struct ares_srv_reply* srv = srv0;
218
219 EXPECT_EQ("a1.srv.example.com", std::string(srv->host));
220 EXPECT_EQ(0, srv->priority);
221 EXPECT_EQ(5, srv->weight);
222 EXPECT_EQ(6789, srv->port);
223 EXPECT_NE(nullptr, srv->next);
224 srv = srv->next;
225
226 EXPECT_EQ("a2.srv.example.com", std::string(srv->host));
227 EXPECT_EQ(0, srv->priority);
228 EXPECT_EQ(5, srv->weight);
229 EXPECT_EQ(4567, srv->port);
230 EXPECT_NE(nullptr, srv->next);
231 srv = srv->next;
232
233 EXPECT_EQ("a3.srv.example.com", std::string(srv->host));
234 EXPECT_EQ(0, srv->priority);
235 EXPECT_EQ(5, srv->weight);
236 EXPECT_EQ(5678, srv->port);
237 EXPECT_EQ(nullptr, srv->next);
238
239 ares_free_data(srv0);
240 }
241
TEST_F(LibraryTest,ParseSrvReplyErrors)242 TEST_F(LibraryTest, ParseSrvReplyErrors) {
243 DNSPacket pkt;
244 pkt.set_qid(0x1234).set_response().set_aa()
245 .add_question(new DNSQuestion("example.abc.def.com", T_SRV))
246 .add_answer(new DNSSrvRR("example.abc.def.com", 180, 0, 10, 8160, "example.abc.def.com"));
247 std::vector<byte> data;
248 struct ares_srv_reply* srv = nullptr;
249
250 // No question.
251 pkt.questions_.clear();
252 data = pkt.data();
253 EXPECT_EQ(ARES_EBADRESP, ares_parse_srv_reply(data.data(), (int)data.size(), &srv));
254 pkt.add_question(new DNSQuestion("example.abc.def.com", T_SRV));
255
256 #ifdef DISABLED
257 // Question != answer
258 pkt.questions_.clear();
259 pkt.add_question(new DNSQuestion("Axample.com", T_SRV));
260 data = pkt.data();
261 EXPECT_EQ(ARES_ENODATA, ares_parse_srv_reply(data.data(), (int)data.size(), &srv));
262 pkt.questions_.clear();
263 pkt.add_question(new DNSQuestion("example.com", T_SRV));
264 #endif
265
266 // Two questions.
267 pkt.add_question(new DNSQuestion("example.abc.def.com", T_SRV));
268 data = pkt.data();
269 EXPECT_EQ(ARES_EBADRESP, ares_parse_srv_reply(data.data(), (int)data.size(), &srv));
270 pkt.questions_.clear();
271 pkt.add_question(new DNSQuestion("64.48.32.16.in-addr.arpa", T_PTR));
272
273 // Wrong sort of answer.
274 pkt.answers_.clear();
275 pkt.add_answer(new DNSMxRR("example.com", 100, 100, "mx1.example.com"));
276 data = pkt.data();
277 EXPECT_EQ(ARES_SUCCESS, ares_parse_srv_reply(data.data(), (int)data.size(), &srv));
278 EXPECT_EQ(nullptr, srv);
279 pkt.answers_.clear();
280 pkt.add_answer(new DNSSrvRR("example.abc.def.com", 180, 0, 10, 8160, "example.abc.def.com"));
281
282 // No answer.
283 pkt.answers_.clear();
284 data = pkt.data();
285 EXPECT_EQ(ARES_ENODATA, ares_parse_srv_reply(data.data(), (int)data.size(), &srv));
286 pkt.add_answer(new DNSSrvRR("example.abc.def.com", 180, 0, 10, 8160, "example.abc.def.com"));
287
288 // Truncated packets.
289 data = pkt.data();
290 for (size_t len = 1; len < data.size(); len++) {
291 int rc = ares_parse_srv_reply(data.data(), (int)len, &srv);
292 EXPECT_TRUE(rc == ARES_EBADRESP || rc == ARES_EBADNAME);
293 }
294
295 // Negative Length
296 EXPECT_EQ(ARES_EBADRESP, ares_parse_srv_reply(data.data(), -1, &srv));
297 }
298
TEST_F(LibraryTest,ParseSrvReplyAllocFail)299 TEST_F(LibraryTest, ParseSrvReplyAllocFail) {
300 DNSPacket pkt;
301 pkt.set_qid(0x1234).set_response().set_aa()
302 .add_question(new DNSQuestion("example.abc.def.com", T_SRV))
303 .add_answer(new DNSCnameRR("example.com", 300, "c.example.com"))
304 .add_answer(new DNSSrvRR("example.abc.def.com", 180, 0, 10, 8160, "example.abc.def.com"));
305 std::vector<byte> data = pkt.data();
306 struct ares_srv_reply* srv = nullptr;
307
308 for (int ii = 1; ii <= 5; ii++) {
309 ClearFails();
310 SetAllocFail(ii);
311 EXPECT_EQ(ARES_ENOMEM, ares_parse_srv_reply(data.data(), (int)data.size(), &srv)) << ii;
312 }
313 }
314
315 } // namespace test
316 } // namespace ares
317