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 | // Copyright (C) 2010-2024 Internet Systems Consortium, Inc. ("ISC")
//
// This Source Code Form is subject to the terms of the Mozilla Public
// License, v. 2.0. If a copy of the MPL was not distributed with this
// file, You can obtain one at http://mozilla.org/MPL/2.0/.
#include <config.h>
#include <sstream><--- Include file: not found. Please note: Cppcheck does not need standard library headers to get proper results.
#include <exceptions/exceptions.h>
#include <util/buffer.h>
#include <dns/edns.h>
#include <dns/exceptions.h>
#include <dns/message.h>
#include <dns/messagerenderer.h>
#include <dns/name.h>
#include <dns/rcode.h>
#include <dns/rdataclass.h>
#include <dns/rrclass.h>
#include <dns/rrttl.h>
#include <dns/rrtype.h>
#include <gtest/gtest.h><--- Include file: not found. Please note: Cppcheck does not need standard library headers to get proper results.
#include <dns/tests/unittest_util.h>
#include <util/unittests/wiredata.h>
using namespace std;
using namespace isc::dns;
using namespace isc::util;
using namespace isc::dns::rdata;
using isc::UnitTestUtil;
using isc::util::unittests::matchWireData;
const uint8_t EDNS::SUPPORTED_VERSION;
namespace {
class EDNSTest : public ::testing::Test {
protected:
EDNSTest() : rrtype(RRType::OPT()), buffer(0, 0), obuffer(0), rcode(0) {
opt_rdata = ConstRdataPtr(new generic::OPT());
edns_base.setUDPSize(4096);
}
RRType rrtype;
EDNS edns_base;
ConstEDNSPtr edns;
InputBuffer buffer;
OutputBuffer obuffer;
MessageRenderer renderer;
ConstRdataPtr opt_rdata;
Rcode rcode;
vector<unsigned char> wiredata;
};
// RRClass of EDNS OPT means UDP buffer size
const RRClass rrclass(4096);
// RRTTL of EDNS OPT encodes extended-rcode, version, and DO bit
const RRTTL rrttl_do_on(0x00008000); // DO=on
const RRTTL rrttl_do_off(0); // DO=off
const RRTTL rrttl_badver(0x00018000); // version=1, DO=on
TEST_F(EDNSTest, badVerConstruct) {<--- syntax error
EXPECT_THROW(EDNS(1), isc::InvalidParameter);
}
TEST_F(EDNSTest, DNSSECDOBit) {
// tests for EDNS from RR
// DO bit is on, so DNSSEC should be considered to be supported.
EXPECT_TRUE(EDNS(Name::ROOT_NAME(), rrclass, rrtype,
rrttl_do_on, *opt_rdata).getDNSSECAwareness());
// DO bit is off. DNSSEC should be considered to be unsupported.
EXPECT_FALSE(EDNS(Name::ROOT_NAME(), rrclass, rrtype,
rrttl_do_off, *opt_rdata).getDNSSECAwareness());
// tests for EDNS constructed by hand
EXPECT_FALSE(edns_base.getDNSSECAwareness()); // false by default
edns_base.setDNSSECAwareness(true); // enable by hand
EXPECT_TRUE(edns_base.getDNSSECAwareness());
edns_base.setDNSSECAwareness(false); // disable by hand
EXPECT_FALSE(edns_base.getDNSSECAwareness());
}
TEST_F(EDNSTest, UDPSize) {
EXPECT_EQ(4096, EDNS(Name::ROOT_NAME(), rrclass, rrtype, rrttl_do_on,
*opt_rdata).getUDPSize());
// EDNS UDP size smaller than the traditional max, 512. Unusual, but
// not prohibited.
edns_base.setUDPSize(511);
EXPECT_EQ(511, edns_base.getUDPSize());
// Even 0 is okay.
edns_base.setUDPSize(0);
EXPECT_EQ(0, edns_base.getUDPSize());
// Possible max value is also okay, although the higher layer app may
// adjust it to a reasonably lower value
edns_base.setUDPSize(65535);
EXPECT_EQ(65535, edns_base.getUDPSize());
}
TEST_F(EDNSTest, getVersion) {
// Constructed by hand
EXPECT_EQ(EDNS::SUPPORTED_VERSION, EDNS().getVersion());
// From RR
EXPECT_EQ(EDNS::SUPPORTED_VERSION,
EDNS(Name::ROOT_NAME(), rrclass, rrtype, rrttl_do_on,
*opt_rdata).getVersion());
}
TEST_F(EDNSTest, BadWireData) {
// Incompatible RR type
EXPECT_THROW(EDNS(Name::ROOT_NAME(), rrclass, RRType::A(),
rrttl_do_on, *opt_rdata), isc::InvalidParameter);
// OPT RR of a non root name
EXPECT_THROW(EDNS(Name("example.com"), rrclass, rrtype,
rrttl_do_on, *opt_rdata), DNSMessageFORMERR);
// Unsupported Version
EXPECT_THROW(EDNS(Name::ROOT_NAME(), rrclass, rrtype,
rrttl_badver, *opt_rdata), DNSMessageBADVERS);
}
TEST_F(EDNSTest, toText) {
// Typical case, disabling DNSSEC
EXPECT_EQ("; EDNS: version: 0, flags:; udp: 4096\n",
EDNS(Name::ROOT_NAME(), rrclass, rrtype, rrttl_do_off,
*opt_rdata).toText());
// Typical case, enabling DNSSEC
EXPECT_EQ("; EDNS: version: 0, flags: do; udp: 4096\n",
EDNS(Name::ROOT_NAME(), rrclass, rrtype, rrttl_do_on,
*opt_rdata).toText());
// Non-0 extended Rcode: ignored in the toText() output.
EXPECT_EQ("; EDNS: version: 0, flags: do; udp: 4096\n",
EDNS(Name::ROOT_NAME(), rrclass, rrtype,
RRTTL(0x01008000), *opt_rdata).toText());
// Unknown flag: ignored in the toText() output.
EXPECT_EQ("; EDNS: version: 0, flags: do; udp: 4096\n",
EDNS(Name::ROOT_NAME(), rrclass, rrtype,
RRTTL(0x00008001), *opt_rdata).toText());
}
TEST_F(EDNSTest, toWireRenderer) {
// Typical case, (explicitly) disabling DNSSEC
edns_base.setDNSSECAwareness(false);
EXPECT_EQ(1, edns_base.toWire(renderer,
Rcode::NOERROR().getExtendedCode()));
UnitTestUtil::readWireData("edns_toWire1.wire", wiredata);
matchWireData(&wiredata[0], wiredata.size(),
renderer.getData(), renderer.getLength());
// Typical case, enabling DNSSEC
renderer.clear();
wiredata.clear();
edns_base.setDNSSECAwareness(true);
EXPECT_EQ(1, edns_base.toWire(renderer,
Rcode::NOERROR().getExtendedCode()));
UnitTestUtil::readWireData("edns_toWire2.wire", wiredata);
matchWireData(&wiredata[0], wiredata.size(),
renderer.getData(), renderer.getLength());
// Non-0 extended Rcode
renderer.clear();
wiredata.clear();
edns_base.setDNSSECAwareness(true);
EXPECT_EQ(1, edns_base.toWire(renderer,
Rcode::BADVERS().getExtendedCode()));
UnitTestUtil::readWireData("edns_toWire3.wire", wiredata);
matchWireData(&wiredata[0], wiredata.size(),
renderer.getData(), renderer.getLength());
// Uncommon UDP buffer size
renderer.clear();
wiredata.clear();
edns_base.setDNSSECAwareness(true);
edns_base.setUDPSize(511);
EXPECT_EQ(1, edns_base.toWire(renderer,
Rcode::NOERROR().getExtendedCode()));
UnitTestUtil::readWireData("edns_toWire4.wire", wiredata);
matchWireData(&wiredata[0], wiredata.size(),
renderer.getData(), renderer.getLength());
// From RR with unknown flag. If used for toWire(), the unknown flag
// should disappear.
renderer.clear();
wiredata.clear();
EXPECT_EQ(1, EDNS(Name::ROOT_NAME(), rrclass, rrtype, RRTTL(0x00008001),
*opt_rdata).toWire(renderer,
Rcode::NOERROR().getExtendedCode()));
UnitTestUtil::readWireData("edns_toWire2.wire", wiredata);
matchWireData(&wiredata[0], wiredata.size(),
renderer.getData(), renderer.getLength());
// If the available length in the renderer is not sufficient for the OPT
// RR, it shouldn't be inserted.
renderer.clear();
renderer.setLengthLimit(10); // 10 = minimum length of OPT RR - 1
edns_base.setDNSSECAwareness(true);
edns_base.setUDPSize(4096);
EXPECT_EQ(0, edns_base.toWire(renderer,
Rcode::NOERROR().getExtendedCode()));
// renderer should be intact
EXPECT_EQ(0, renderer.getLength());
}
TEST_F(EDNSTest, toWireBuffer) {
// "to renderer" and "to buffer" should generally produce the same result.
// for simplicity we only check one typical case to confirm that.
EXPECT_EQ(1, edns_base.toWire(obuffer,
Rcode::NOERROR().getExtendedCode()));
UnitTestUtil::readWireData("edns_toWire1.wire", wiredata);
matchWireData(&wiredata[0], wiredata.size(),
obuffer.getData(), obuffer.getLength());
}
TEST_F(EDNSTest, createFromRR) {
uint8_t extended_rcode;
// normal case
edns = ConstEDNSPtr(createEDNSFromRR(Name::ROOT_NAME(), rrclass, rrtype,
rrttl_do_on, *opt_rdata,
extended_rcode));
EXPECT_EQ(EDNS::SUPPORTED_VERSION, edns->getVersion());
EXPECT_TRUE(edns->getDNSSECAwareness());
EXPECT_EQ(4096, edns->getUDPSize());
EXPECT_EQ(0, static_cast<int>(extended_rcode));
// non-0 extended rcode
extended_rcode = 0;
ConstEDNSPtr(createEDNSFromRR(Name::ROOT_NAME(), rrclass, rrtype,
RRTTL(0x01008000), *opt_rdata,
extended_rcode));
EXPECT_EQ(1, static_cast<int>(extended_rcode));
// creation triggers an exception. extended_rcode must be intact.
extended_rcode = 0;
EXPECT_THROW(createEDNSFromRR(Name::ROOT_NAME(), rrclass, rrtype,
rrttl_badver, *opt_rdata, extended_rcode),
DNSMessageBADVERS);
EXPECT_EQ(0, static_cast<int>(extended_rcode));
}
// test operator<<. We simply confirm it appends the result of toText().
TEST_F(EDNSTest, LeftShiftOperator) {
ostringstream oss;
oss << edns_base;
EXPECT_EQ(edns_base.toText(), oss.str());
}
}
|