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
|
// 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 <vector>
#include <sstream>
#include <exceptions/exceptions.h>
#include <util/buffer.h>
#include <dns/exceptions.h>
#include <dns/messagerenderer.h>
#include <dns/name.h>
#include <dns/question.h>
#include <dns/rrclass.h>
#include <dns/rrtype.h>
#include <gtest/gtest.h>
#include <dns/tests/unittest_util.h>
#include <util/unittests/wiredata.h>
using namespace std;
using namespace isc::dns;
using namespace isc::util;
using isc::UnitTestUtil;
using isc::util::unittests::matchWireData;
namespace {
class QuestionTest : public ::testing::Test {
protected:
QuestionTest() : obuffer(0),
example_name1(Name("foo.example.com")),
example_name2(Name("bar.example.com")),
test_question1(example_name1, RRClass::IN(),
RRType::NS()),
test_question2(example_name2, RRClass::CH(),
RRType::A()) {
}
OutputBuffer obuffer;
MessageRenderer renderer;
Name example_name1;
Name example_name2;
Question test_question1;
Question test_question2;
vector<unsigned char> wiredata;
};
Question
questionFromWire(const char* datafile, size_t position = 0) {
vector<unsigned char> data;
UnitTestUtil::readWireData(datafile, data);
InputBuffer buffer(&data[0], data.size());
buffer.setPosition(position);
return (Question(buffer));
}
TEST_F(QuestionTest, fromWire) {
Question q = questionFromWire("question_fromWire");
EXPECT_EQ(example_name1, q.getName());
EXPECT_EQ(RRClass::IN(), q.getClass());
EXPECT_EQ(RRType::NS(), q.getType());
// owner name of the second Question is compressed. It's uncommon
// (to have multiple questions), but isn't prohibited by the protocol.
q = questionFromWire("question_fromWire", 21);
EXPECT_EQ(example_name2, q.getName());
EXPECT_EQ(RRClass::CH(), q.getClass());
EXPECT_EQ(RRType::A(), q.getType());
// Pathological cases: Corresponding exceptions will be thrown from
// the underlying parser.
EXPECT_THROW(questionFromWire("question_fromWire", 31), DNSMessageFORMERR);
EXPECT_THROW(questionFromWire("question_fromWire", 36), IncompleteRRClass);
}
TEST_F(QuestionTest, toText) {
EXPECT_EQ("foo.example.com. IN NS", test_question1.toText());
EXPECT_EQ("bar.example.com. CH A", test_question2.toText());
EXPECT_EQ("foo.example.com. IN NS", test_question1.toText(false));
EXPECT_EQ("bar.example.com. CH A", test_question2.toText(false));
EXPECT_EQ("foo.example.com. IN NS\n", test_question1.toText(true));
EXPECT_EQ("bar.example.com. CH A\n", test_question2.toText(true));
}
TEST_F(QuestionTest, toWireBuffer) {
test_question1.toWire(obuffer);
test_question2.toWire(obuffer);
UnitTestUtil::readWireData("question_toWire1", wiredata);
matchWireData(&wiredata[0], wiredata.size(),
obuffer.getData(), obuffer.getLength());
}
TEST_F(QuestionTest, toWireRenderer) {
test_question1.toWire(renderer);
test_question2.toWire(renderer);
UnitTestUtil::readWireData("question_toWire2", wiredata);
matchWireData(&wiredata[0], wiredata.size(),
renderer.getData(), renderer.getLength());
}
TEST_F(QuestionTest, toWireTruncated) {
// If the available length in the renderer is too small, it would require
// truncation. This won't happen in normal cases, but protocol wise it
// could still happen if and when we support some (possibly future) opcode
// that allows multiple questions.
// Set the length limit to the qname length so that the whole question
// would request truncated
renderer.setLengthLimit(example_name1.getLength());
EXPECT_FALSE(renderer.isTruncated()); // check pre-render condition
EXPECT_EQ(0, test_question1.toWire(renderer));
EXPECT_TRUE(renderer.isTruncated());
EXPECT_EQ(0, renderer.getLength()); // renderer shouldn't have any data
}
// test operator<<. We simply confirm it appends the result of toText().
TEST_F(QuestionTest, LeftShiftOperator) {
ostringstream oss;
oss << test_question1;
EXPECT_EQ(test_question1.toText(), oss.str());
}
TEST_F(QuestionTest, comparison) {
const Name a("a");
const Name b("b");
const RRClass in(RRClass::IN());
const RRClass ch(RRClass::CH());
const RRType ns(RRType::NS());
const RRType aaaa(RRType::AAAA());
EXPECT_TRUE(Question(a, in, ns) < Question(a, in, aaaa));
EXPECT_FALSE(Question(a, in, aaaa) < Question(a, in, ns));
EXPECT_TRUE(Question(a, in, ns) < Question(a, ch, ns));
EXPECT_FALSE(Question(a, ch, ns) < Question(a, in, ns));
EXPECT_TRUE(Question(a, in, ns) < Question(a, ch, aaaa));
EXPECT_FALSE(Question(a, ch, aaaa) < Question(a, in, ns));
EXPECT_TRUE(Question(a, in, ns) < Question(b, in, ns));
EXPECT_FALSE(Question(a, in, ns) < Question(a, in, ns));
EXPECT_TRUE(Question(a, in, ns) < Question(b, ch, ns));
EXPECT_FALSE(Question(b, ch, ns) < Question(a, in, ns));
EXPECT_TRUE(Question(a, in, ns) < Question(b, ch, aaaa));
EXPECT_FALSE(Question(b, ch, aaaa) < Question(a, in, ns));
EXPECT_FALSE(Question(a, in, ns) < Question(a, in, ns));
EXPECT_FALSE(Question(a, ch, ns) < Question(a, ch, ns));
EXPECT_FALSE(Question(b, in, ns) < Question(b, in, ns));
EXPECT_FALSE(Question(b, in, aaaa) < Question(b, in, aaaa));
// Identical questions are equal
EXPECT_TRUE(Question(a, in, ns) == Question(a, in, ns));
EXPECT_FALSE(Question(a, in, ns) != Question(a, in, ns));
// Components differing by one component are unequal...
EXPECT_FALSE(Question(b, in, ns) == Question(a, in, ns));
EXPECT_TRUE(Question(b, in, ns) != Question(a, in, ns));
EXPECT_FALSE(Question(a, ch, ns) == Question(a, in, ns));
EXPECT_TRUE(Question(a, ch, ns) != Question(a, in, ns));
EXPECT_FALSE(Question(a, in, aaaa) == Question(a, in, ns));
EXPECT_TRUE(Question(a, in, aaaa) != Question(a, in, ns));
// ... as are those differing by two components
EXPECT_FALSE(Question(b, ch, ns) == Question(a, in, ns));
EXPECT_TRUE(Question(b, ch, ns) != Question(a, in, ns));
EXPECT_FALSE(Question(b, in, aaaa) == Question(a, in, ns));
EXPECT_TRUE(Question(b, in, aaaa) != Question(a, in, ns));
EXPECT_FALSE(Question(a, ch, aaaa) == Question(a, in, ns));
EXPECT_TRUE(Question(a, ch, aaaa) != Question(a, in, ns));
// ... and question differing by all three
EXPECT_FALSE(Question(b, ch, aaaa) == Question(a, in, ns));
EXPECT_TRUE(Question(b, ch, aaaa) != Question(a, in, ns));
}
}
|
