1//
2// ip/impl/address_v4.ipp
3// ~~~~~~~~~~~~~~~~~~~~~~
4//
5// Copyright (c) 2003-2015 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 <stdexcept>
21#include <boost/asio/error.hpp>
22#include <boost/asio/detail/socket_ops.hpp>
23#include <boost/asio/detail/throw_error.hpp>
24#include <boost/asio/detail/throw_exception.hpp>
25#include <boost/asio/ip/address_v4.hpp>
26
27#include <boost/asio/detail/push_options.hpp>
28
29namespace boost {
30namespace asio {
31namespace ip {
32
33address_v4::address_v4(const address_v4::bytes_type& bytes)
34{
35#if UCHAR_MAX > 0xFF
36 if (bytes[0] > 0xFF || bytes[1] > 0xFF
37 || bytes[2] > 0xFF || bytes[3] > 0xFF)
38 {
39 std::out_of_range ex("address_v4 from bytes_type");
40 boost::asio::detail::throw_exception(ex);
41 }
42#endif // UCHAR_MAX > 0xFF
43
44 using namespace std; // For memcpy.
45 memcpy(&addr_.s_addr, bytes.data(), 4);
46}
47
48address_v4::address_v4(unsigned long addr)
49{
50#if ULONG_MAX > 0xFFFFFFFF
51 if (addr > 0xFFFFFFFF)
52 {
53 std::out_of_range ex("address_v4 from unsigned long");
54 boost::asio::detail::throw_exception(ex);
55 }
56#endif // ULONG_MAX > 0xFFFFFFFF
57
58 addr_.s_addr = boost::asio::detail::socket_ops::host_to_network_long(
59 static_cast<boost::asio::detail::u_long_type>(addr));
60}
61
62address_v4::bytes_type address_v4::to_bytes() const
63{
64 using namespace std; // For memcpy.
65 bytes_type bytes;
66#if defined(BOOST_ASIO_HAS_STD_ARRAY)
67 memcpy(bytes.data(), &addr_.s_addr, 4);
68#else // defined(BOOST_ASIO_HAS_STD_ARRAY)
69 memcpy(bytes.elems, &addr_.s_addr, 4);
70#endif // defined(BOOST_ASIO_HAS_STD_ARRAY)
71 return bytes;
72}
73
74unsigned long address_v4::to_ulong() const
75{
76 return boost::asio::detail::socket_ops::network_to_host_long(addr_.s_addr);
77}
78
79std::string address_v4::to_string() const
80{
81 boost::system::error_code ec;
82 std::string addr = to_string(ec);
83 boost::asio::detail::throw_error(ec);
84 return addr;
85}
86
87std::string address_v4::to_string(boost::system::error_code& ec) const
88{
89 char addr_str[boost::asio::detail::max_addr_v4_str_len];
90 const char* addr =
91 boost::asio::detail::socket_ops::inet_ntop(
92 BOOST_ASIO_OS_DEF(AF_INET), &addr_, addr_str,
93 boost::asio::detail::max_addr_v4_str_len, 0, ec);
94 if (addr == 0)
95 return std::string();
96 return addr;
97}
98
99address_v4 address_v4::from_string(const char* str)
100{
101 boost::system::error_code ec;
102 address_v4 addr = from_string(str, ec);
103 boost::asio::detail::throw_error(ec);
104 return addr;
105}
106
107address_v4 address_v4::from_string(
108 const char* str, boost::system::error_code& ec)
109{
110 address_v4 tmp;
111 if (boost::asio::detail::socket_ops::inet_pton(
112 BOOST_ASIO_OS_DEF(AF_INET), str, &tmp.addr_, 0, ec) <= 0)
113 return address_v4();
114 return tmp;
115}
116
117address_v4 address_v4::from_string(const std::string& str)
118{
119 return from_string(str.c_str());
120}
121
122address_v4 address_v4::from_string(
123 const std::string& str, boost::system::error_code& ec)
124{
125 return from_string(str.c_str(), ec);
126}
127
128bool address_v4::is_loopback() const
129{
130 return (to_ulong() & 0xFF000000) == 0x7F000000;
131}
132
133bool address_v4::is_unspecified() const
134{
135 return to_ulong() == 0;
136}
137
138bool address_v4::is_class_a() const
139{
140 return (to_ulong() & 0x80000000) == 0;
141}
142
143bool address_v4::is_class_b() const
144{
145 return (to_ulong() & 0xC0000000) == 0x80000000;
146}
147
148bool address_v4::is_class_c() const
149{
150 return (to_ulong() & 0xE0000000) == 0xC0000000;
151}
152
153bool address_v4::is_multicast() const
154{
155 return (to_ulong() & 0xF0000000) == 0xE0000000;
156}
157
158address_v4 address_v4::broadcast(const address_v4& addr, const address_v4& mask)
159{
160 return address_v4(addr.to_ulong() | (mask.to_ulong() ^ 0xFFFFFFFF));
161}
162
163address_v4 address_v4::netmask(const address_v4& addr)
164{
165 if (addr.is_class_a())
166 return address_v4(0xFF000000);
167 if (addr.is_class_b())
168 return address_v4(0xFFFF0000);
169 if (addr.is_class_c())
170 return address_v4(0xFFFFFF00);
171 return address_v4(0xFFFFFFFF);
172}
173
174} // namespace ip
175} // namespace asio
176} // namespace boost
177
178#include <boost/asio/detail/pop_options.hpp>
179
180#endif // BOOST_ASIO_IP_IMPL_ADDRESS_V4_IPP
181

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