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
|
// Copyright (c) 2019-2024, The Monero Project
//
// All rights reserved.
//
// Redistribution and use in source and binary forms, with or without modification, are
// permitted provided that the following conditions are met:
//
// 1. Redistributions of source code must retain the above copyright notice, this list of
// conditions and the following disclaimer.
//
// 2. Redistributions in binary form must reproduce the above copyright notice, this list
// of conditions and the following disclaimer in the documentation and/or other
// materials provided with the distribution.
//
// 3. Neither the name of the copyright holder nor the names of its contributors may be
// used to endorse or promote products derived from this software without specific
// prior written permission.
//
// THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS" AND ANY
// EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF
// MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL
// THE COPYRIGHT HOLDER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
// SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
// PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
// INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT,
// STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF
// THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
#include "i2p_address.h"
#include <algorithm>
#include <boost/spirit/include/karma_generate.hpp>
#include <boost/spirit/include/karma_uint.hpp>
#include <cassert>
#include <cstring>
#include <limits>
#include "net/error.h"
#include "serialization/keyvalue_serialization.h"
#include "storages/portable_storage.h"
#include "string_tools_lexical.h"
namespace net
{
namespace
{
// !TODO only b32 addresses right now
constexpr const char tld[] = u8".b32.i2p";
constexpr const char unknown_host[] = "<unknown i2p host>";
constexpr const unsigned b32_length = 52;
constexpr const char base32_alphabet[] =
u8"ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyz234567";
expect<void> host_check(boost::string_ref host) noexcept
{
if (!host.ends_with(tld))
return {net::error::expected_tld};
host.remove_suffix(sizeof(tld) - 1);
if (host.size() != b32_length)
return {net::error::invalid_i2p_address};
if (host.find_first_not_of(base32_alphabet) != boost::string_ref::npos)
return {net::error::invalid_i2p_address};
return success();
}
struct i2p_serialized
{
std::string host;
std::uint16_t port; //! Leave for compatability with older clients
BEGIN_KV_SERIALIZE_MAP()
KV_SERIALIZE(host)
KV_SERIALIZE(port)
END_KV_SERIALIZE_MAP()
};
}
i2p_address::i2p_address(const boost::string_ref host) noexcept
{
// this is a private constructor, throw if moved to public
assert(host.size() < sizeof(host_));
const std::size_t length = std::min(sizeof(host_) - 1, host.size());
std::memcpy(host_, host.data(), length);
std::memset(host_ + length, 0, sizeof(host_) - length);
}
const char* i2p_address::unknown_str() noexcept
{
return unknown_host;
}
i2p_address::i2p_address() noexcept
{
static_assert(sizeof(unknown_host) <= sizeof(host_), "bad buffer size");
std::memcpy(host_, unknown_host, sizeof(unknown_host));
std::memset(host_ + sizeof(unknown_host), 0, sizeof(host_) - sizeof(unknown_host));
}
expect<i2p_address> i2p_address::make(const boost::string_ref address)
{
boost::string_ref host = address.substr(0, address.rfind(':'));
MONERO_CHECK(host_check(host));
static_assert(b32_length + sizeof(tld) == sizeof(i2p_address::host_), "bad internal host size");
return i2p_address{host};
}
bool i2p_address::_load(epee::serialization::portable_storage& src, epee::serialization::section* hparent)
{
i2p_serialized in{};
if (in._load(src, hparent) && in.host.size() < sizeof(host_) && (in.host == unknown_host || !host_check(in.host).has_error()))
{
std::memcpy(host_, in.host.data(), in.host.size());
std::memset(host_ + in.host.size(), 0, sizeof(host_) - in.host.size());
return true;
}
static_assert(sizeof(unknown_host) <= sizeof(host_), "bad buffer size");
std::memcpy(host_, unknown_host, sizeof(unknown_host)); // include null terminator
return false;
}
bool i2p_address::store(epee::serialization::portable_storage& dest, epee::serialization::section* hparent) const
{
// Set port to 1 for backwards compatability; zero is invalid port
const i2p_serialized out{std::string{host_}, 1};
return out.store(dest, hparent);
}
i2p_address::i2p_address(const i2p_address& rhs) noexcept
{
std::memcpy(host_, rhs.host_, sizeof(host_));
}
i2p_address& i2p_address::operator=(const i2p_address& rhs) noexcept
{
if (this != std::addressof(rhs))
{
std::memcpy(host_, rhs.host_, sizeof(host_));
}
return *this;
}
bool i2p_address::is_unknown() const noexcept
{
static_assert(1 <= sizeof(host_), "host size too small");
return host_[0] == '<'; // character is not allowed otherwise
}
bool i2p_address::equal(const i2p_address& rhs) const noexcept
{
return is_same_host(rhs);
}
bool i2p_address::less(const i2p_address& rhs) const noexcept
{
return std::strcmp(host_str(), rhs.host_str()) < 0;
}
bool i2p_address::is_same_host(const i2p_address& rhs) const noexcept
{
return std::strcmp(host_str(), rhs.host_str()) == 0;
}
std::string i2p_address::str() const
{
return host_str();
}
}
|
