1//
2// ip/impl/address_v6.ipp
3// ~~~~~~~~~~~~~~~~~~~~~~
4//
5// Copyright (c) 2003-2021 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_V6_IPP
12#define BOOST_ASIO_IP_IMPL_ADDRESS_V6_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 <cstring>
20#include <stdexcept>
21#include <typeinfo>
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/error.hpp>
26#include <boost/asio/ip/address_v6.hpp>
27#include <boost/asio/ip/bad_address_cast.hpp>
28
29#include <boost/asio/detail/push_options.hpp>
30
31namespace boost {
32namespace asio {
33namespace ip {
34
35address_v6::address_v6() BOOST_ASIO_NOEXCEPT
36  : addr_(),
37    scope_id_(0)
38{
39}
40
41address_v6::address_v6(const address_v6::bytes_type& bytes,
42    scope_id_type scope)
43  : scope_id_(scope)
44{
45#if UCHAR_MAX > 0xFF
46  for (std::size_t i = 0; i < bytes.size(); ++i)
47  {
48    if (bytes[i] > 0xFF)
49    {
50      std::out_of_range ex("address_v6 from bytes_type");
51      boost::asio::detail::throw_exception(ex);
52    }
53  }
54#endif // UCHAR_MAX > 0xFF
55
56  using namespace std; // For memcpy.
57  memcpy(addr_.s6_addr, bytes.data(), 16);
58}
59
60address_v6::address_v6(const address_v6& other) BOOST_ASIO_NOEXCEPT
61  : addr_(other.addr_),
62    scope_id_(other.scope_id_)
63{
64}
65
66#if defined(BOOST_ASIO_HAS_MOVE)
67address_v6::address_v6(address_v6&& other) BOOST_ASIO_NOEXCEPT
68  : addr_(other.addr_),
69    scope_id_(other.scope_id_)
70{
71}
72#endif // defined(BOOST_ASIO_HAS_MOVE)
73
74address_v6& address_v6::operator=(const address_v6& other) BOOST_ASIO_NOEXCEPT
75{
76  addr_ = other.addr_;
77  scope_id_ = other.scope_id_;
78  return *this;
79}
80
81#if defined(BOOST_ASIO_HAS_MOVE)
82address_v6& address_v6::operator=(address_v6&& other) BOOST_ASIO_NOEXCEPT
83{
84  addr_ = other.addr_;
85  scope_id_ = other.scope_id_;
86  return *this;
87}
88#endif // defined(BOOST_ASIO_HAS_MOVE)
89
90address_v6::bytes_type address_v6::to_bytes() const BOOST_ASIO_NOEXCEPT
91{
92  using namespace std; // For memcpy.
93  bytes_type bytes;
94#if defined(BOOST_ASIO_HAS_STD_ARRAY)
95  memcpy(bytes.data(), addr_.s6_addr, 16);
96#else // defined(BOOST_ASIO_HAS_STD_ARRAY)
97  memcpy(bytes.elems, addr_.s6_addr, 16);
98#endif // defined(BOOST_ASIO_HAS_STD_ARRAY)
99  return bytes;
100}
101
102std::string address_v6::to_string() const
103{
104  boost::system::error_code ec;
105  char addr_str[boost::asio::detail::max_addr_v6_str_len];
106  const char* addr =
107    boost::asio::detail::socket_ops::inet_ntop(
108        BOOST_ASIO_OS_DEF(AF_INET6), &addr_, addr_str,
109        boost::asio::detail::max_addr_v6_str_len, scope_id_, ec);
110  if (addr == 0)
111    boost::asio::detail::throw_error(ec);
112  return addr;
113}
114
115#if !defined(BOOST_ASIO_NO_DEPRECATED)
116std::string address_v6::to_string(boost::system::error_code& ec) const
117{
118  char addr_str[boost::asio::detail::max_addr_v6_str_len];
119  const char* addr =
120    boost::asio::detail::socket_ops::inet_ntop(
121        BOOST_ASIO_OS_DEF(AF_INET6), &addr_, addr_str,
122        boost::asio::detail::max_addr_v6_str_len, scope_id_, ec);
123  if (addr == 0)
124    return std::string();
125  return addr;
126}
127
128address_v4 address_v6::to_v4() const
129{
130  if (!is_v4_mapped() && !is_v4_compatible())
131  {
132    bad_address_cast ex;
133    boost::asio::detail::throw_exception(ex);
134  }
135
136  address_v4::bytes_type v4_bytes = { { addr_.s6_addr[12],
137    addr_.s6_addr[13], addr_.s6_addr[14], addr_.s6_addr[15] } };
138  return address_v4(v4_bytes);
139}
140#endif // !defined(BOOST_ASIO_NO_DEPRECATED)
141
142bool address_v6::is_loopback() const BOOST_ASIO_NOEXCEPT
143{
144  return ((addr_.s6_addr[0] == 0) && (addr_.s6_addr[1] == 0)
145      && (addr_.s6_addr[2] == 0) && (addr_.s6_addr[3] == 0)
146      && (addr_.s6_addr[4] == 0) && (addr_.s6_addr[5] == 0)
147      && (addr_.s6_addr[6] == 0) && (addr_.s6_addr[7] == 0)
148      && (addr_.s6_addr[8] == 0) && (addr_.s6_addr[9] == 0)
149      && (addr_.s6_addr[10] == 0) && (addr_.s6_addr[11] == 0)
150      && (addr_.s6_addr[12] == 0) && (addr_.s6_addr[13] == 0)
151      && (addr_.s6_addr[14] == 0) && (addr_.s6_addr[15] == 1));
152}
153
154bool address_v6::is_unspecified() const BOOST_ASIO_NOEXCEPT
155{
156  return ((addr_.s6_addr[0] == 0) && (addr_.s6_addr[1] == 0)
157      && (addr_.s6_addr[2] == 0) && (addr_.s6_addr[3] == 0)
158      && (addr_.s6_addr[4] == 0) && (addr_.s6_addr[5] == 0)
159      && (addr_.s6_addr[6] == 0) && (addr_.s6_addr[7] == 0)
160      && (addr_.s6_addr[8] == 0) && (addr_.s6_addr[9] == 0)
161      && (addr_.s6_addr[10] == 0) && (addr_.s6_addr[11] == 0)
162      && (addr_.s6_addr[12] == 0) && (addr_.s6_addr[13] == 0)
163      && (addr_.s6_addr[14] == 0) && (addr_.s6_addr[15] == 0));
164}
165
166bool address_v6::is_link_local() const BOOST_ASIO_NOEXCEPT
167{
168  return ((addr_.s6_addr[0] == 0xfe) && ((addr_.s6_addr[1] & 0xc0) == 0x80));
169}
170
171bool address_v6::is_site_local() const BOOST_ASIO_NOEXCEPT
172{
173  return ((addr_.s6_addr[0] == 0xfe) && ((addr_.s6_addr[1] & 0xc0) == 0xc0));
174}
175
176bool address_v6::is_v4_mapped() const BOOST_ASIO_NOEXCEPT
177{
178  return ((addr_.s6_addr[0] == 0) && (addr_.s6_addr[1] == 0)
179      && (addr_.s6_addr[2] == 0) && (addr_.s6_addr[3] == 0)
180      && (addr_.s6_addr[4] == 0) && (addr_.s6_addr[5] == 0)
181      && (addr_.s6_addr[6] == 0) && (addr_.s6_addr[7] == 0)
182      && (addr_.s6_addr[8] == 0) && (addr_.s6_addr[9] == 0)
183      && (addr_.s6_addr[10] == 0xff) && (addr_.s6_addr[11] == 0xff));
184}
185
186#if !defined(BOOST_ASIO_NO_DEPRECATED)
187bool address_v6::is_v4_compatible() const
188{
189  return ((addr_.s6_addr[0] == 0) && (addr_.s6_addr[1] == 0)
190      && (addr_.s6_addr[2] == 0) && (addr_.s6_addr[3] == 0)
191      && (addr_.s6_addr[4] == 0) && (addr_.s6_addr[5] == 0)
192      && (addr_.s6_addr[6] == 0) && (addr_.s6_addr[7] == 0)
193      && (addr_.s6_addr[8] == 0) && (addr_.s6_addr[9] == 0)
194      && (addr_.s6_addr[10] == 0) && (addr_.s6_addr[11] == 0)
195      && !((addr_.s6_addr[12] == 0)
196        && (addr_.s6_addr[13] == 0)
197        && (addr_.s6_addr[14] == 0)
198        && ((addr_.s6_addr[15] == 0) || (addr_.s6_addr[15] == 1))));
199}
200#endif // !defined(BOOST_ASIO_NO_DEPRECATED)
201
202bool address_v6::is_multicast() const BOOST_ASIO_NOEXCEPT
203{
204  return (addr_.s6_addr[0] == 0xff);
205}
206
207bool address_v6::is_multicast_global() const BOOST_ASIO_NOEXCEPT
208{
209  return ((addr_.s6_addr[0] == 0xff) && ((addr_.s6_addr[1] & 0x0f) == 0x0e));
210}
211
212bool address_v6::is_multicast_link_local() const BOOST_ASIO_NOEXCEPT
213{
214  return ((addr_.s6_addr[0] == 0xff) && ((addr_.s6_addr[1] & 0x0f) == 0x02));
215}
216
217bool address_v6::is_multicast_node_local() const BOOST_ASIO_NOEXCEPT
218{
219  return ((addr_.s6_addr[0] == 0xff) && ((addr_.s6_addr[1] & 0x0f) == 0x01));
220}
221
222bool address_v6::is_multicast_org_local() const BOOST_ASIO_NOEXCEPT
223{
224  return ((addr_.s6_addr[0] == 0xff) && ((addr_.s6_addr[1] & 0x0f) == 0x08));
225}
226
227bool address_v6::is_multicast_site_local() const BOOST_ASIO_NOEXCEPT
228{
229  return ((addr_.s6_addr[0] == 0xff) && ((addr_.s6_addr[1] & 0x0f) == 0x05));
230}
231
232bool operator==(const address_v6& a1, const address_v6& a2) BOOST_ASIO_NOEXCEPT
233{
234  using namespace std; // For memcmp.
235  return memcmp(&a1.addr_, &a2.addr_,
236      sizeof(boost::asio::detail::in6_addr_type)) == 0
237    && a1.scope_id_ == a2.scope_id_;
238}
239
240bool operator<(const address_v6& a1, const address_v6& a2) BOOST_ASIO_NOEXCEPT
241{
242  using namespace std; // For memcmp.
243  int memcmp_result = memcmp(&a1.addr_, &a2.addr_,
244      sizeof(boost::asio::detail::in6_addr_type));
245  if (memcmp_result < 0)
246    return true;
247  if (memcmp_result > 0)
248    return false;
249  return a1.scope_id_ < a2.scope_id_;
250}
251
252address_v6 address_v6::loopback() BOOST_ASIO_NOEXCEPT
253{
254  address_v6 tmp;
255  tmp.addr_.s6_addr[15] = 1;
256  return tmp;
257}
258
259#if !defined(BOOST_ASIO_NO_DEPRECATED)
260address_v6 address_v6::v4_mapped(const address_v4& addr)
261{
262  address_v4::bytes_type v4_bytes = addr.to_bytes();
263  bytes_type v6_bytes = { { 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0xFF, 0xFF,
264    v4_bytes[0], v4_bytes[1], v4_bytes[2], v4_bytes[3] } };
265  return address_v6(v6_bytes);
266}
267
268address_v6 address_v6::v4_compatible(const address_v4& addr)
269{
270  address_v4::bytes_type v4_bytes = addr.to_bytes();
271  bytes_type v6_bytes = { { 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0,
272    v4_bytes[0], v4_bytes[1], v4_bytes[2], v4_bytes[3] } };
273  return address_v6(v6_bytes);
274}
275#endif // !defined(BOOST_ASIO_NO_DEPRECATED)
276
277address_v6 make_address_v6(const char* str)
278{
279  boost::system::error_code ec;
280  address_v6 addr = make_address_v6(str, ec);
281  boost::asio::detail::throw_error(ec);
282  return addr;
283}
284
285address_v6 make_address_v6(const char* str,
286    boost::system::error_code& ec) BOOST_ASIO_NOEXCEPT
287{
288  address_v6::bytes_type bytes;
289  unsigned long scope_id = 0;
290  if (boost::asio::detail::socket_ops::inet_pton(
291        BOOST_ASIO_OS_DEF(AF_INET6), str, &bytes[0], &scope_id, ec) <= 0)
292    return address_v6();
293  return address_v6(bytes, scope_id);
294}
295
296address_v6 make_address_v6(const std::string& str)
297{
298  return make_address_v6(str.c_str());
299}
300
301address_v6 make_address_v6(const std::string& str,
302    boost::system::error_code& ec) BOOST_ASIO_NOEXCEPT
303{
304  return make_address_v6(str.c_str(), ec);
305}
306
307#if defined(BOOST_ASIO_HAS_STRING_VIEW)
308
309address_v6 make_address_v6(string_view str)
310{
311  return make_address_v6(static_cast<std::string>(str));
312}
313
314address_v6 make_address_v6(string_view str,
315    boost::system::error_code& ec) BOOST_ASIO_NOEXCEPT
316{
317  return make_address_v6(static_cast<std::string>(str), ec);
318}
319
320#endif // defined(BOOST_ASIO_HAS_STRING_VIEW)
321
322address_v4 make_address_v4(
323    v4_mapped_t, const address_v6& v6_addr)
324{
325  if (!v6_addr.is_v4_mapped())
326  {
327    bad_address_cast ex;
328    boost::asio::detail::throw_exception(ex);
329  }
330
331  address_v6::bytes_type v6_bytes = v6_addr.to_bytes();
332  address_v4::bytes_type v4_bytes = { { v6_bytes[12],
333    v6_bytes[13], v6_bytes[14], v6_bytes[15] } };
334  return address_v4(v4_bytes);
335}
336
337address_v6 make_address_v6(
338    v4_mapped_t, const address_v4& v4_addr)
339{
340  address_v4::bytes_type v4_bytes = v4_addr.to_bytes();
341  address_v6::bytes_type v6_bytes = { { 0, 0, 0, 0, 0, 0, 0, 0, 0, 0,
342    0xFF, 0xFF, v4_bytes[0], v4_bytes[1], v4_bytes[2], v4_bytes[3] } };
343  return address_v6(v6_bytes);
344}
345
346} // namespace ip
347} // namespace asio
348} // namespace boost
349
350#include <boost/asio/detail/pop_options.hpp>
351
352#endif // BOOST_ASIO_IP_IMPL_ADDRESS_V6_IPP
353