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
|
// Copyright 2018 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 "osp/impl/discovery/mdns/domain_name.h"
#include <algorithm>
#include <iterator>
#include "util/stringprintf.h"
namespace openscreen {
namespace osp {
// static
DomainName DomainName::GetLocalDomain() {
return DomainName{{5, 'l', 'o', 'c', 'a', 'l', 0}};
}
// static
ErrorOr<DomainName> DomainName::Append(const DomainName& first,
const DomainName& second) {
OSP_CHECK(first.domain_name_.size());
OSP_CHECK(second.domain_name_.size());
// Both vectors should represent null terminated domain names.
OSP_DCHECK_EQ(first.domain_name_.back(), '\0');
OSP_DCHECK_EQ(second.domain_name_.back(), '\0');
if ((first.domain_name_.size() + second.domain_name_.size() - 1) >
kDomainNameMaxLength) {
return Error::Code::kDomainNameTooLong;
}
DomainName result;
result.domain_name_.clear();
result.domain_name_.insert(result.domain_name_.begin(),
first.domain_name_.begin(),
first.domain_name_.end());
result.domain_name_.insert(result.domain_name_.end() - 1,
second.domain_name_.begin(),
second.domain_name_.end() - 1);
return result;
}
DomainName::DomainName() : domain_name_{0u} {}
DomainName::DomainName(std::vector<uint8_t>&& domain_name)
: domain_name_(std::move(domain_name)) {
OSP_CHECK_LE(domain_name_.size(), kDomainNameMaxLength);
}
DomainName::DomainName(const DomainName&) = default;
DomainName::DomainName(DomainName&&) noexcept = default;
DomainName::~DomainName() = default;
DomainName& DomainName::operator=(const DomainName&) = default;
DomainName& DomainName::operator=(DomainName&&) noexcept = default;
bool DomainName::operator==(const DomainName& other) const {
if (domain_name_.size() != other.domain_name_.size()) {
return false;
}
for (size_t i = 0; i < domain_name_.size(); ++i) {
if (tolower(domain_name_[i]) != tolower(other.domain_name_[i])) {
return false;
}
}
return true;
}
bool DomainName::operator!=(const DomainName& other) const {
return !(*this == other);
}
bool DomainName::EndsWithLocalDomain() const {
const DomainName local_domain = GetLocalDomain();
if (domain_name_.size() < local_domain.domain_name_.size())
return false;
return std::equal(local_domain.domain_name_.begin(),
local_domain.domain_name_.end(),
domain_name_.end() - local_domain.domain_name_.size());
}
Error DomainName::Append(const DomainName& after) {
OSP_CHECK(after.domain_name_.size());
OSP_DCHECK_EQ(after.domain_name_.back(), 0u);
if ((domain_name_.size() + after.domain_name_.size() - 1) >
kDomainNameMaxLength) {
return Error::Code::kDomainNameTooLong;
}
domain_name_.insert(domain_name_.end() - 1, after.domain_name_.begin(),
after.domain_name_.end() - 1);
return Error::None();
}
std::vector<absl::string_view> DomainName::GetLabels() const {
OSP_DCHECK_GT(domain_name_.size(), 0u);
OSP_DCHECK_LT(domain_name_.size(), kDomainNameMaxLength);
std::vector<absl::string_view> result;
const uint8_t* data = domain_name_.data();
while (*data != 0) {
const size_t label_length = *data;
OSP_DCHECK_LT(label_length, kDomainNameMaxLabelLength);
++data;
result.emplace_back(reinterpret_cast<const char*>(data), label_length);
data += label_length;
}
return result;
}
bool DomainNameComparator::operator()(const DomainName& a,
const DomainName& b) const {
return a.domain_name() < b.domain_name();
}
std::ostream& operator<<(std::ostream& os, const DomainName& domain_name) {
const auto& data = domain_name.domain_name();
OSP_DCHECK_GT(data.size(), 0u);
auto it = data.begin();
while (*it != 0) {
size_t length = *it++;
PrettyPrintAsciiHex(os, it, it + length);
it += length;
os << ".";
}
return os;
}
} // namespace osp
} // namespace openscreen
|
