/usr/include/asio/ip/address_v6.hpp is in libasio-dev 1.10.1-1.
This file is owned by root:root, with mode 0o644.
The actual contents of the file can be viewed below.
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// ip/address_v6.hpp
// ~~~~~~~~~~~~~~~~~
//
// Copyright (c) 2003-2013 Christopher M. Kohlhoff (chris at kohlhoff dot com)
//
// Distributed under the Boost Software License, Version 1.0. (See accompanying
// file LICENSE_1_0.txt or copy at http://www.boost.org/LICENSE_1_0.txt)
//
#ifndef ASIO_IP_ADDRESS_V6_HPP
#define ASIO_IP_ADDRESS_V6_HPP
#if defined(_MSC_VER) && (_MSC_VER >= 1200)
# pragma once
#endif // defined(_MSC_VER) && (_MSC_VER >= 1200)
#include "asio/detail/config.hpp"
#include <string>
#include "asio/detail/array.hpp"
#include "asio/detail/socket_types.hpp"
#include "asio/detail/winsock_init.hpp"
#include "asio/error_code.hpp"
#include "asio/ip/address_v4.hpp"
#if !defined(ASIO_NO_IOSTREAM)
# include <iosfwd>
#endif // !defined(ASIO_NO_IOSTREAM)
#include "asio/detail/push_options.hpp"
namespace asio {
namespace ip {
/// Implements IP version 6 style addresses.
/**
* The asio::ip::address_v6 class provides the ability to use and
* manipulate IP version 6 addresses.
*
* @par Thread Safety
* @e Distinct @e objects: Safe.@n
* @e Shared @e objects: Unsafe.
*/
class address_v6
{
public:
/// The type used to represent an address as an array of bytes.
/**
* @note This type is defined in terms of the C++0x template @c std::array
* when it is available. Otherwise, it uses @c boost:array.
*/
#if defined(GENERATING_DOCUMENTATION)
typedef array<unsigned char, 16> bytes_type;
#else
typedef asio::detail::array<unsigned char, 16> bytes_type;
#endif
/// Default constructor.
ASIO_DECL address_v6();
/// Construct an address from raw bytes and scope ID.
ASIO_DECL explicit address_v6(const bytes_type& bytes,
unsigned long scope_id = 0);
/// Copy constructor.
ASIO_DECL address_v6(const address_v6& other);
#if defined(ASIO_HAS_MOVE)
/// Move constructor.
ASIO_DECL address_v6(address_v6&& other);
#endif // defined(ASIO_HAS_MOVE)
/// Assign from another address.
ASIO_DECL address_v6& operator=(const address_v6& other);
#if defined(ASIO_HAS_MOVE)
/// Move-assign from another address.
ASIO_DECL address_v6& operator=(address_v6&& other);
#endif // defined(ASIO_HAS_MOVE)
/// The scope ID of the address.
/**
* Returns the scope ID associated with the IPv6 address.
*/
unsigned long scope_id() const
{
return scope_id_;
}
/// The scope ID of the address.
/**
* Modifies the scope ID associated with the IPv6 address.
*/
void scope_id(unsigned long id)
{
scope_id_ = id;
}
/// Get the address in bytes, in network byte order.
ASIO_DECL bytes_type to_bytes() const;
/// Get the address as a string.
ASIO_DECL std::string to_string() const;
/// Get the address as a string.
ASIO_DECL std::string to_string(asio::error_code& ec) const;
/// Create an address from an IP address string.
ASIO_DECL static address_v6 from_string(const char* str);
/// Create an address from an IP address string.
ASIO_DECL static address_v6 from_string(
const char* str, asio::error_code& ec);
/// Create an address from an IP address string.
ASIO_DECL static address_v6 from_string(const std::string& str);
/// Create an address from an IP address string.
ASIO_DECL static address_v6 from_string(
const std::string& str, asio::error_code& ec);
/// Converts an IPv4-mapped or IPv4-compatible address to an IPv4 address.
ASIO_DECL address_v4 to_v4() const;
/// Determine whether the address is a loopback address.
ASIO_DECL bool is_loopback() const;
/// Determine whether the address is unspecified.
ASIO_DECL bool is_unspecified() const;
/// Determine whether the address is link local.
ASIO_DECL bool is_link_local() const;
/// Determine whether the address is site local.
ASIO_DECL bool is_site_local() const;
/// Determine whether the address is a mapped IPv4 address.
ASIO_DECL bool is_v4_mapped() const;
/// Determine whether the address is an IPv4-compatible address.
ASIO_DECL bool is_v4_compatible() const;
/// Determine whether the address is a multicast address.
ASIO_DECL bool is_multicast() const;
/// Determine whether the address is a global multicast address.
ASIO_DECL bool is_multicast_global() const;
/// Determine whether the address is a link-local multicast address.
ASIO_DECL bool is_multicast_link_local() const;
/// Determine whether the address is a node-local multicast address.
ASIO_DECL bool is_multicast_node_local() const;
/// Determine whether the address is a org-local multicast address.
ASIO_DECL bool is_multicast_org_local() const;
/// Determine whether the address is a site-local multicast address.
ASIO_DECL bool is_multicast_site_local() const;
/// Compare two addresses for equality.
ASIO_DECL friend bool operator==(
const address_v6& a1, const address_v6& a2);
/// Compare two addresses for inequality.
friend bool operator!=(const address_v6& a1, const address_v6& a2)
{
return !(a1 == a2);
}
/// Compare addresses for ordering.
ASIO_DECL friend bool operator<(
const address_v6& a1, const address_v6& a2);
/// Compare addresses for ordering.
friend bool operator>(const address_v6& a1, const address_v6& a2)
{
return a2 < a1;
}
/// Compare addresses for ordering.
friend bool operator<=(const address_v6& a1, const address_v6& a2)
{
return !(a2 < a1);
}
/// Compare addresses for ordering.
friend bool operator>=(const address_v6& a1, const address_v6& a2)
{
return !(a1 < a2);
}
/// Obtain an address object that represents any address.
static address_v6 any()
{
return address_v6();
}
/// Obtain an address object that represents the loopback address.
ASIO_DECL static address_v6 loopback();
/// Create an IPv4-mapped IPv6 address.
ASIO_DECL static address_v6 v4_mapped(const address_v4& addr);
/// Create an IPv4-compatible IPv6 address.
ASIO_DECL static address_v6 v4_compatible(const address_v4& addr);
private:
// The underlying IPv6 address.
asio::detail::in6_addr_type addr_;
// The scope ID associated with the address.
unsigned long scope_id_;
};
#if !defined(ASIO_NO_IOSTREAM)
/// Output an address as a string.
/**
* Used to output a human-readable string for a specified address.
*
* @param os The output stream to which the string will be written.
*
* @param addr The address to be written.
*
* @return The output stream.
*
* @relates asio::ip::address_v6
*/
template <typename Elem, typename Traits>
std::basic_ostream<Elem, Traits>& operator<<(
std::basic_ostream<Elem, Traits>& os, const address_v6& addr);
#endif // !defined(ASIO_NO_IOSTREAM)
} // namespace ip
} // namespace asio
#include "asio/detail/pop_options.hpp"
#include "asio/ip/impl/address_v6.hpp"
#if defined(ASIO_HEADER_ONLY)
# include "asio/ip/impl/address_v6.ipp"
#endif // defined(ASIO_HEADER_ONLY)
#endif // ASIO_IP_ADDRESS_V6_HPP
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