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
|
// Copyright (c) 2009 The Chromium Authors. All rights reserved.
// Use of this source code is governed by a BSD-style license that can be
// found in the LICENSE file.
#include "net/dns/dns_util.h"
#include "testing/gtest/include/gtest/gtest.h"
namespace {
bool IsValidDNSDomainName(const char* name) {
size_t length = strlen(name);
for (size_t i = 0; i < length; ++i) {
if (name[i] == '.') {
if (i == 0 || name[i - 1] == '.') {
return false;
}
continue;
}
if (!net::IsValidHostLabelCharacter(name[i],
i == 0 || name[i - 1] == '.')) {
return false;
}
}
return true;
}
} // namespace
namespace net {
class DNSUtilTest : public testing::Test {
};
// IncludeNUL converts a char* to a std::string and includes the terminating
// NUL in the result.
static std::string IncludeNUL(const char* in) {
return std::string(in, strlen(in) + 1);
}
TEST_F(DNSUtilTest, DNSDomainFromDot) {
std::string out;
EXPECT_FALSE(DNSDomainFromDot("", &out));
EXPECT_FALSE(DNSDomainFromDot(".", &out));
EXPECT_FALSE(DNSDomainFromDot("..", &out));
EXPECT_TRUE(DNSDomainFromDot("com", &out));
EXPECT_EQ(out, IncludeNUL("\003com"));
EXPECT_TRUE(DNSDomainFromDot("google.com", &out));
EXPECT_EQ(out, IncludeNUL("\x006google\003com"));
EXPECT_TRUE(DNSDomainFromDot("www.google.com", &out));
EXPECT_EQ(out, IncludeNUL("\003www\006google\003com"));
// Label is 63 chars: still valid
EXPECT_TRUE(DNSDomainFromDot("z23456789a123456789a123456789a123456789a123456789a123456789a123", &out));
EXPECT_EQ(out, IncludeNUL("\077z23456789a123456789a123456789a123456789a123456789a123456789a123"));
// Label is too long: invalid
EXPECT_FALSE(DNSDomainFromDot("123456789a123456789a123456789a123456789a123456789a123456789a1234", &out));
// 253 characters in the name: still valid
EXPECT_TRUE(DNSDomainFromDot("abcdefghi.abcdefghi.abcdefghi.abcdefghi.abcdefghi.abcdefghi.abcdefghi.abcdefghi.abcdefghi.abcdefghi.abcdefghi.abcdefghi.abcdefghi.abcdefghi.abcdefghi.abcdefghi.abcdefghi.abcdefghi.abcdefghi.abcdefghi.abcdefghi.abcdefghi.abcdefghi.abcdefghi.abcdefghi.abc", &out));
EXPECT_EQ(out, IncludeNUL("\011abcdefghi\011abcdefghi\011abcdefghi\011abcdefghi\011abcdefghi\011abcdefghi\011abcdefghi\011abcdefghi\011abcdefghi\011abcdefghi\011abcdefghi\011abcdefghi\011abcdefghi\011abcdefghi\011abcdefghi\011abcdefghi\011abcdefghi\011abcdefghi\011abcdefghi\011abcdefghi\011abcdefghi\011abcdefghi\011abcdefghi\011abcdefghi\011abcdefghi\003abc"));
// 254 characters in the name: invalid
EXPECT_FALSE(DNSDomainFromDot("123456789.123456789.123456789.123456789.123456789.123456789.123456789.123456789.123456789.123456789.123456789.123456789.123456789.123456789.123456789.123456789.123456789.123456789.123456789.123456789.123456789.123456789.123456789.123456789.123456789.1234", &out));
// Zero length labels should fail, except that one trailing dot is allowed
// (to disable suffix search):
EXPECT_FALSE(DNSDomainFromDot(".google.com", &out));
EXPECT_FALSE(DNSDomainFromDot("www..google.com", &out));
EXPECT_TRUE(DNSDomainFromDot("www.google.com.", &out));
EXPECT_EQ(out, IncludeNUL("\003www\006google\003com"));
}
TEST_F(DNSUtilTest, DNSDomainToString) {
EXPECT_EQ("", DNSDomainToString(IncludeNUL("")));
EXPECT_EQ("foo", DNSDomainToString(IncludeNUL("\003foo")));
EXPECT_EQ("foo.bar", DNSDomainToString(IncludeNUL("\003foo\003bar")));
EXPECT_EQ("foo.bar.uk",
DNSDomainToString(IncludeNUL("\003foo\003bar\002uk")));
// It should cope with a lack of root label.
EXPECT_EQ("foo.bar", DNSDomainToString("\003foo\003bar"));
// Invalid inputs should return an empty string.
EXPECT_EQ("", DNSDomainToString(IncludeNUL("\x80")));
EXPECT_EQ("", DNSDomainToString("\x06"));
}
TEST_F(DNSUtilTest, IsValidDNSDomain) {
const char* const bad_hostnames[] = {
"%20%20noodles.blorg", "noo dles.blorg ", "noo dles.blorg. ",
"^noodles.blorg", "noodles^.blorg", "noo&dles.blorg",
"noodles.blorg`", "www.-noodles.blorg",
};
// TODO(palmer): In the future, when we can remove support for invalid names,
// change the calls to from |IsValidDNSDomainName| to |IsValidDNSDomain|, and
// remove |IsValidDNSDomainName| (defined above).
for (size_t i = 0; i < arraysize(bad_hostnames); ++i) {
EXPECT_FALSE(IsValidDNSDomainName(bad_hostnames[i]));
}
const char* const good_hostnames[] = {
"www.noodles.blorg", "1www.noodles.blorg", "www.2noodles.blorg",
"www.n--oodles.blorg", "www.noodl_es.blorg", "www.no-_odles.blorg",
"www_.noodles.blorg", "www.noodles.blorg.", "_privet._tcp.local",
};
for (size_t i = 0; i < arraysize(good_hostnames); ++i) {
EXPECT_TRUE(IsValidDNSDomainName(good_hostnames[i]));
}
}
} // namespace net
|
