356 lines
9.7 KiB
C++
356 lines
9.7 KiB
C++
//
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// ip/address_v4.hpp
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// ~~~~~~~~~~~~~~~~~
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//
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// Copyright (c) 2003-2021 Christopher M. Kohlhoff (chris at kohlhoff dot com)
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//
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// Distributed under the Boost Software License, Version 1.0. (See accompanying
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// file LICENSE_1_0.txt or copy at http://www.boost.org/LICENSE_1_0.txt)
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//
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#ifndef ASIO_IP_ADDRESS_V4_HPP
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#define ASIO_IP_ADDRESS_V4_HPP
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#if defined(_MSC_VER) && (_MSC_VER >= 1200)
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# pragma once
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#endif // defined(_MSC_VER) && (_MSC_VER >= 1200)
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#include "asio/detail/config.hpp"
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#include <string>
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#include "asio/detail/array.hpp"
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#include "asio/detail/cstdint.hpp"
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#include "asio/detail/socket_types.hpp"
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#include "asio/detail/string_view.hpp"
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#include "asio/detail/winsock_init.hpp"
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#include "asio/error_code.hpp"
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#if defined(ASIO_HAS_STD_HASH)
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# include <functional>
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#endif // defined(ASIO_HAS_STD_HASH)
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#if !defined(ASIO_NO_IOSTREAM)
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# include <iosfwd>
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#endif // !defined(ASIO_NO_IOSTREAM)
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#include "asio/detail/push_options.hpp"
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namespace asio {
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namespace ip {
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/// Implements IP version 4 style addresses.
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/**
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* The asio::ip::address_v4 class provides the ability to use and
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* manipulate IP version 4 addresses.
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*
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* @par Thread Safety
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* @e Distinct @e objects: Safe.@n
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* @e Shared @e objects: Unsafe.
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*/
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class address_v4
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{
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public:
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/// The type used to represent an address as an unsigned integer.
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typedef uint_least32_t uint_type;
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/// The type used to represent an address as an array of bytes.
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/**
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* @note This type is defined in terms of the C++0x template @c std::array
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* when it is available. Otherwise, it uses @c boost:array.
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*/
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#if defined(GENERATING_DOCUMENTATION)
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typedef array<unsigned char, 4> bytes_type;
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#else
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typedef asio::detail::array<unsigned char, 4> bytes_type;
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#endif
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/// Default constructor.
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address_v4() ASIO_NOEXCEPT
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{
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addr_.s_addr = 0;
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}
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/// Construct an address from raw bytes.
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ASIO_DECL explicit address_v4(const bytes_type& bytes);
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/// Construct an address from an unsigned integer in host byte order.
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ASIO_DECL explicit address_v4(uint_type addr);
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/// Copy constructor.
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address_v4(const address_v4& other) ASIO_NOEXCEPT
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: addr_(other.addr_)
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{
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}
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#if defined(ASIO_HAS_MOVE)
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/// Move constructor.
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address_v4(address_v4&& other) ASIO_NOEXCEPT
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: addr_(other.addr_)
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{
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}
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#endif // defined(ASIO_HAS_MOVE)
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/// Assign from another address.
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address_v4& operator=(const address_v4& other) ASIO_NOEXCEPT
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{
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addr_ = other.addr_;
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return *this;
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}
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#if defined(ASIO_HAS_MOVE)
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/// Move-assign from another address.
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address_v4& operator=(address_v4&& other) ASIO_NOEXCEPT
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{
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addr_ = other.addr_;
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return *this;
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}
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#endif // defined(ASIO_HAS_MOVE)
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/// Get the address in bytes, in network byte order.
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ASIO_DECL bytes_type to_bytes() const ASIO_NOEXCEPT;
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/// Get the address as an unsigned integer in host byte order
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ASIO_DECL uint_type to_uint() const ASIO_NOEXCEPT;
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#if !defined(ASIO_NO_DEPRECATED)
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/// Get the address as an unsigned long in host byte order
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ASIO_DECL unsigned long to_ulong() const;
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#endif // !defined(ASIO_NO_DEPRECATED)
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/// Get the address as a string in dotted decimal format.
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ASIO_DECL std::string to_string() const;
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#if !defined(ASIO_NO_DEPRECATED)
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/// (Deprecated: Use other overload.) Get the address as a string in dotted
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/// decimal format.
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ASIO_DECL std::string to_string(asio::error_code& ec) const;
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/// (Deprecated: Use make_address_v4().) Create an address from an IP address
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/// string in dotted decimal form.
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static address_v4 from_string(const char* str);
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/// (Deprecated: Use make_address_v4().) Create an address from an IP address
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/// string in dotted decimal form.
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static address_v4 from_string(
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const char* str, asio::error_code& ec);
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/// (Deprecated: Use make_address_v4().) Create an address from an IP address
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/// string in dotted decimal form.
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static address_v4 from_string(const std::string& str);
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/// (Deprecated: Use make_address_v4().) Create an address from an IP address
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/// string in dotted decimal form.
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static address_v4 from_string(
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const std::string& str, asio::error_code& ec);
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#endif // !defined(ASIO_NO_DEPRECATED)
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/// Determine whether the address is a loopback address.
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ASIO_DECL bool is_loopback() const ASIO_NOEXCEPT;
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/// Determine whether the address is unspecified.
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ASIO_DECL bool is_unspecified() const ASIO_NOEXCEPT;
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#if !defined(ASIO_NO_DEPRECATED)
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/// (Deprecated: Use network_v4 class.) Determine whether the address is a
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/// class A address.
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ASIO_DECL bool is_class_a() const;
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/// (Deprecated: Use network_v4 class.) Determine whether the address is a
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/// class B address.
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ASIO_DECL bool is_class_b() const;
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/// (Deprecated: Use network_v4 class.) Determine whether the address is a
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/// class C address.
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ASIO_DECL bool is_class_c() const;
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#endif // !defined(ASIO_NO_DEPRECATED)
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/// Determine whether the address is a multicast address.
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ASIO_DECL bool is_multicast() const ASIO_NOEXCEPT;
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/// Compare two addresses for equality.
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friend bool operator==(const address_v4& a1,
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const address_v4& a2) ASIO_NOEXCEPT
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{
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return a1.addr_.s_addr == a2.addr_.s_addr;
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}
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/// Compare two addresses for inequality.
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friend bool operator!=(const address_v4& a1,
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const address_v4& a2) ASIO_NOEXCEPT
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{
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return a1.addr_.s_addr != a2.addr_.s_addr;
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}
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/// Compare addresses for ordering.
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friend bool operator<(const address_v4& a1,
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const address_v4& a2) ASIO_NOEXCEPT
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{
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return a1.to_uint() < a2.to_uint();
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}
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/// Compare addresses for ordering.
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friend bool operator>(const address_v4& a1,
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const address_v4& a2) ASIO_NOEXCEPT
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{
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return a1.to_uint() > a2.to_uint();
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}
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/// Compare addresses for ordering.
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friend bool operator<=(const address_v4& a1,
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const address_v4& a2) ASIO_NOEXCEPT
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{
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return a1.to_uint() <= a2.to_uint();
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}
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/// Compare addresses for ordering.
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friend bool operator>=(const address_v4& a1,
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const address_v4& a2) ASIO_NOEXCEPT
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{
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return a1.to_uint() >= a2.to_uint();
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}
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/// Obtain an address object that represents any address.
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static address_v4 any() ASIO_NOEXCEPT
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{
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return address_v4();
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}
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/// Obtain an address object that represents the loopback address.
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static address_v4 loopback() ASIO_NOEXCEPT
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{
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return address_v4(0x7F000001);
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}
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/// Obtain an address object that represents the broadcast address.
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static address_v4 broadcast() ASIO_NOEXCEPT
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{
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return address_v4(0xFFFFFFFF);
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}
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#if !defined(ASIO_NO_DEPRECATED)
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/// (Deprecated: Use network_v4 class.) Obtain an address object that
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/// represents the broadcast address that corresponds to the specified
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/// address and netmask.
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ASIO_DECL static address_v4 broadcast(
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const address_v4& addr, const address_v4& mask);
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/// (Deprecated: Use network_v4 class.) Obtain the netmask that corresponds
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/// to the address, based on its address class.
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ASIO_DECL static address_v4 netmask(const address_v4& addr);
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#endif // !defined(ASIO_NO_DEPRECATED)
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private:
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// The underlying IPv4 address.
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asio::detail::in4_addr_type addr_;
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};
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/// Create an IPv4 address from raw bytes in network order.
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/**
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* @relates address_v4
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*/
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inline address_v4 make_address_v4(const address_v4::bytes_type& bytes)
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{
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return address_v4(bytes);
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}
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/// Create an IPv4 address from an unsigned integer in host byte order.
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/**
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* @relates address_v4
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*/
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inline address_v4 make_address_v4(address_v4::uint_type addr)
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{
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return address_v4(addr);
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}
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/// Create an IPv4 address from an IP address string in dotted decimal form.
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/**
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* @relates address_v4
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*/
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ASIO_DECL address_v4 make_address_v4(const char* str);
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/// Create an IPv4 address from an IP address string in dotted decimal form.
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/**
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* @relates address_v4
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*/
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ASIO_DECL address_v4 make_address_v4(const char* str,
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asio::error_code& ec) ASIO_NOEXCEPT;
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/// Create an IPv4 address from an IP address string in dotted decimal form.
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/**
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* @relates address_v4
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*/
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ASIO_DECL address_v4 make_address_v4(const std::string& str);
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/// Create an IPv4 address from an IP address string in dotted decimal form.
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/**
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* @relates address_v4
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*/
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ASIO_DECL address_v4 make_address_v4(const std::string& str,
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asio::error_code& ec) ASIO_NOEXCEPT;
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#if defined(ASIO_HAS_STRING_VIEW) \
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|| defined(GENERATING_DOCUMENTATION)
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/// Create an IPv4 address from an IP address string in dotted decimal form.
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/**
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* @relates address_v4
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*/
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ASIO_DECL address_v4 make_address_v4(string_view str);
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/// Create an IPv4 address from an IP address string in dotted decimal form.
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/**
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* @relates address_v4
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*/
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ASIO_DECL address_v4 make_address_v4(string_view str,
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asio::error_code& ec) ASIO_NOEXCEPT;
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#endif // defined(ASIO_HAS_STRING_VIEW)
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// || defined(GENERATING_DOCUMENTATION)
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#if !defined(ASIO_NO_IOSTREAM)
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/// Output an address as a string.
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/**
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* Used to output a human-readable string for a specified address.
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*
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* @param os The output stream to which the string will be written.
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*
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* @param addr The address to be written.
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*
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* @return The output stream.
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*
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* @relates asio::ip::address_v4
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*/
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template <typename Elem, typename Traits>
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std::basic_ostream<Elem, Traits>& operator<<(
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std::basic_ostream<Elem, Traits>& os, const address_v4& addr);
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#endif // !defined(ASIO_NO_IOSTREAM)
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} // namespace ip
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} // namespace asio
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#if defined(ASIO_HAS_STD_HASH)
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namespace std {
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template <>
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struct hash<asio::ip::address_v4>
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{
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std::size_t operator()(const asio::ip::address_v4& addr)
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const ASIO_NOEXCEPT
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{
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return std::hash<unsigned int>()(addr.to_uint());
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}
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};
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} // namespace std
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#endif // defined(ASIO_HAS_STD_HASH)
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#include "asio/detail/pop_options.hpp"
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#include "asio/ip/impl/address_v4.hpp"
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#if defined(ASIO_HEADER_ONLY)
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# include "asio/ip/impl/address_v4.ipp"
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#endif // defined(ASIO_HEADER_ONLY)
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#endif // ASIO_IP_ADDRESS_V4_HPP
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