1//
2// ip/impl/address_v4.ipp
3// ~~~~~~~~~~~~~~~~~~~~~~
4//
5// Copyright (c) 2003-2024 Christopher M. Kohlhoff (chris at kohlhoff dot com)
6//
7// Distributed under the Boost Software License, Version 1.0. (See accompanying
8// file LICENSE_1_0.txt or copy at http://www.boost.org/LICENSE_1_0.txt)
9//
10
11#ifndef BOOST_ASIO_IP_IMPL_ADDRESS_V4_IPP
12#define BOOST_ASIO_IP_IMPL_ADDRESS_V4_IPP
13
14#if defined(_MSC_VER) && (_MSC_VER >= 1200)
15# pragma once
16#endif // defined(_MSC_VER) && (_MSC_VER >= 1200)
17
18#include <boost/asio/detail/config.hpp>
19#include <climits>
20#include <limits>
21#include <stdexcept>
22#include <boost/asio/error.hpp>
23#include <boost/asio/detail/socket_ops.hpp>
24#include <boost/asio/detail/throw_error.hpp>
25#include <boost/asio/detail/throw_exception.hpp>
26#include <boost/asio/ip/address_v4.hpp>
27
28#include <boost/asio/detail/push_options.hpp>
29
30namespace boost {
31namespace asio {
32namespace ip {
33
34address_v4::address_v4(const address_v4::bytes_type& bytes)
35{
36#if UCHAR_MAX > 0xFF
37 if (bytes[0] > 0xFF || bytes[1] > 0xFF
38 || bytes[2] > 0xFF || bytes[3] > 0xFF)
39 {
40 std::out_of_range ex("address_v4 from bytes_type");
41 boost::asio::detail::throw_exception(ex);
42 }
43#endif // UCHAR_MAX > 0xFF
44
45 using namespace std; // For memcpy.
46 memcpy(dest: &addr_.s_addr, src: bytes.data(), n: 4);
47}
48
49address_v4::address_v4(address_v4::uint_type addr)
50{
51 if ((std::numeric_limits<uint_type>::max)() > 0xFFFFFFFF)
52 {
53 std::out_of_range ex("address_v4 from unsigned integer");
54 boost::asio::detail::throw_exception(e: ex);
55 }
56
57 addr_.s_addr = boost::asio::detail::socket_ops::host_to_network_long(
58 value: static_cast<boost::asio::detail::u_long_type>(addr));
59}
60
61address_v4::bytes_type address_v4::to_bytes() const noexcept
62{
63 using namespace std; // For memcpy.
64 bytes_type bytes;
65 memcpy(dest: bytes.data(), src: &addr_.s_addr, n: 4);
66 return bytes;
67}
68
69address_v4::uint_type address_v4::to_uint() const noexcept
70{
71 return boost::asio::detail::socket_ops::network_to_host_long(value: addr_.s_addr);
72}
73
74#if !defined(BOOST_ASIO_NO_DEPRECATED)
75unsigned long address_v4::to_ulong() const
76{
77 return boost::asio::detail::socket_ops::network_to_host_long(value: addr_.s_addr);
78}
79#endif // !defined(BOOST_ASIO_NO_DEPRECATED)
80
81std::string address_v4::to_string() const
82{
83 boost::system::error_code ec;
84 char addr_str[boost::asio::detail::max_addr_v4_str_len];
85 const char* addr =
86 boost::asio::detail::socket_ops::inet_ntop(
87 BOOST_ASIO_OS_DEF(AF_INET), src: &addr_, dest: addr_str,
88 length: boost::asio::detail::max_addr_v4_str_len, scope_id: 0, ec);
89 if (addr == 0)
90 boost::asio::detail::throw_error(err: ec);
91 return addr;
92}
93
94#if !defined(BOOST_ASIO_NO_DEPRECATED)
95std::string address_v4::to_string(boost::system::error_code& ec) const
96{
97 char addr_str[boost::asio::detail::max_addr_v4_str_len];
98 const char* addr =
99 boost::asio::detail::socket_ops::inet_ntop(
100 BOOST_ASIO_OS_DEF(AF_INET), src: &addr_, dest: addr_str,
101 length: boost::asio::detail::max_addr_v4_str_len, scope_id: 0, ec);
102 if (addr == 0)
103 return std::string();
104 return addr;
105}
106#endif // !defined(BOOST_ASIO_NO_DEPRECATED)
107
108bool address_v4::is_loopback() const noexcept
109{
110 return (to_uint() & 0xFF000000) == 0x7F000000;
111}
112
113bool address_v4::is_unspecified() const noexcept
114{
115 return to_uint() == 0;
116}
117
118#if !defined(BOOST_ASIO_NO_DEPRECATED)
119bool address_v4::is_class_a() const
120{
121 return (to_uint() & 0x80000000) == 0;
122}
123
124bool address_v4::is_class_b() const
125{
126 return (to_uint() & 0xC0000000) == 0x80000000;
127}
128
129bool address_v4::is_class_c() const
130{
131 return (to_uint() & 0xE0000000) == 0xC0000000;
132}
133#endif // !defined(BOOST_ASIO_NO_DEPRECATED)
134
135bool address_v4::is_multicast() const noexcept
136{
137 return (to_uint() & 0xF0000000) == 0xE0000000;
138}
139
140#if !defined(BOOST_ASIO_NO_DEPRECATED)
141address_v4 address_v4::broadcast(const address_v4& addr, const address_v4& mask)
142{
143 return address_v4(addr.to_uint() | (mask.to_uint() ^ 0xFFFFFFFF));
144}
145
146address_v4 address_v4::netmask(const address_v4& addr)
147{
148 if (addr.is_class_a())
149 return address_v4(0xFF000000);
150 if (addr.is_class_b())
151 return address_v4(0xFFFF0000);
152 if (addr.is_class_c())
153 return address_v4(0xFFFFFF00);
154 return address_v4(0xFFFFFFFF);
155}
156#endif // !defined(BOOST_ASIO_NO_DEPRECATED)
157
158address_v4 make_address_v4(const char* str)
159{
160 boost::system::error_code ec;
161 address_v4 addr = make_address_v4(str, ec);
162 boost::asio::detail::throw_error(err: ec);
163 return addr;
164}
165
166address_v4 make_address_v4(const char* str,
167 boost::system::error_code& ec) noexcept
168{
169 address_v4::bytes_type bytes;
170 if (boost::asio::detail::socket_ops::inet_pton(
171 BOOST_ASIO_OS_DEF(AF_INET), src: str, dest: &bytes, scope_id: 0, ec) <= 0)
172 return address_v4();
173 return address_v4(bytes);
174}
175
176address_v4 make_address_v4(const std::string& str)
177{
178 return make_address_v4(str: str.c_str());
179}
180
181address_v4 make_address_v4(const std::string& str,
182 boost::system::error_code& ec) noexcept
183{
184 return make_address_v4(str: str.c_str(), ec);
185}
186
187#if defined(BOOST_ASIO_HAS_STRING_VIEW)
188
189address_v4 make_address_v4(string_view str)
190{
191 return make_address_v4(str: static_cast<std::string>(str));
192}
193
194address_v4 make_address_v4(string_view str,
195 boost::system::error_code& ec) noexcept
196{
197 return make_address_v4(str: static_cast<std::string>(str), ec);
198}
199
200#endif // defined(BOOST_ASIO_HAS_STRING_VIEW)
201
202} // namespace ip
203} // namespace asio
204} // namespace boost
205
206#include <boost/asio/detail/pop_options.hpp>
207
208#endif // BOOST_ASIO_IP_IMPL_ADDRESS_V4_IPP
209

source code of boost/libs/asio/include/boost/asio/ip/impl/address_v4.ipp