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//
// ip/basic_resolver_results.hpp
// ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
//
// Copyright (c) 2003-2017 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_BASIC_RESOLVER_RESULTS_HPP
#define ASIO_IP_BASIC_RESOLVER_RESULTS_HPP
#if defined(_MSC_VER) && (_MSC_VER >= 1200)
# pragma once
#endif // defined(_MSC_VER) && (_MSC_VER >= 1200)
#include "asio/detail/config.hpp"
#include <cstddef>
#include <cstring>
#include "asio/detail/socket_ops.hpp"
#include "asio/detail/socket_types.hpp"
#include "asio/ip/basic_resolver_iterator.hpp"
#if defined(ASIO_WINDOWS_RUNTIME)
# include "asio/detail/winrt_utils.hpp"
#endif // defined(ASIO_WINDOWS_RUNTIME)
#include "asio/detail/push_options.hpp"
namespace asio {
namespace ip {
/// A range of entries produced by a resolver.
/**
* The asio::ip::basic_resolver_results class template is used to define
* a range over the results returned by a resolver.
*
* The iterator's value_type, obtained when a results iterator is dereferenced,
* is: @code const basic_resolver_entry<InternetProtocol> @endcode
*
* @note For backward compatibility, basic_resolver_results is derived from
* basic_resolver_iterator. This derivation is deprecated.
*
* @par Thread Safety
* @e Distinct @e objects: Safe.@n
* @e Shared @e objects: Unsafe.
*/
template <typename InternetProtocol>
class basic_resolver_results
#if !defined(ASIO_NO_DEPRECATED)
: public basic_resolver_iterator<InternetProtocol>
#else // !defined(ASIO_NO_DEPRECATED)
: private basic_resolver_iterator<InternetProtocol>
#endif // !defined(ASIO_NO_DEPRECATED)
{
public:
/// The protocol type associated with the results.
typedef InternetProtocol protocol_type;
/// The endpoint type associated with the results.
typedef typename protocol_type::endpoint endpoint_type;
/// The type of a value in the results range.
typedef basic_resolver_entry<endpoint_type> value_type;
/// The type of a const reference to a value in the range.
typedef const value_type& const_reference;
/// The type of a non-const reference to a value in the range.
typedef value_type& reference;
/// The type of an iterator into the range.
typedef basic_resolver_iterator<protocol_type> const_iterator;
/// The type of an iterator into the range.
typedef const_iterator iterator;
/// Type used to represent the distance between two iterators in the range.
typedef std::ptrdiff_t difference_type;
/// Type used to represent a count of the elements in the range.
typedef std::size_t size_type;
/// Default constructor creates an empty range.
basic_resolver_results()
{
}
/// Copy constructor.
basic_resolver_results(const basic_resolver_results& other)
: basic_resolver_iterator<InternetProtocol>(other)
{
}
#if defined(ASIO_HAS_MOVE) || defined(GENERATING_DOCUMENTATION)
/// Move constructor.
basic_resolver_results(basic_resolver_results&& other)
: basic_resolver_iterator<InternetProtocol>(
ASIO_MOVE_CAST(basic_resolver_results)(other))
{
}
#endif // defined(ASIO_HAS_MOVE) || defined(GENERATING_DOCUMENTATION)
/// Assignment operator.
basic_resolver_results& operator=(const basic_resolver_results& other)
{
basic_resolver_iterator<InternetProtocol>::operator=(other);
return *this;
}
#if defined(ASIO_HAS_MOVE) || defined(GENERATING_DOCUMENTATION)
/// Move-assignment operator.
basic_resolver_results& operator=(basic_resolver_results&& other)
{
basic_resolver_iterator<InternetProtocol>::operator=(
ASIO_MOVE_CAST(basic_resolver_results)(other));
return *this;
}
#endif // defined(ASIO_HAS_MOVE) || defined(GENERATING_DOCUMENTATION)
#if !defined(GENERATING_DOCUMENTATION)
// Create results from an addrinfo list returned by getaddrinfo.
static basic_resolver_results create(
asio::detail::addrinfo_type* address_info,
const std::string& host_name, const std::string& service_name)
{
basic_resolver_results results;
if (!address_info)
return results;
std::string actual_host_name = host_name;
if (address_info->ai_canonname)
actual_host_name = address_info->ai_canonname;
results.values_.reset(new values_type);
while (address_info)
{
if (address_info->ai_family == ASIO_OS_DEF(AF_INET)
|| address_info->ai_family == ASIO_OS_DEF(AF_INET6))
{
using namespace std; // For memcpy.
typename InternetProtocol::endpoint endpoint;
endpoint.resize(static_cast<std::size_t>(address_info->ai_addrlen));
memcpy(endpoint.data(), address_info->ai_addr,
address_info->ai_addrlen);
results.values_->push_back(
basic_resolver_entry<InternetProtocol>(endpoint,
actual_host_name, service_name));
}
address_info = address_info->ai_next;
}
return results;
}
// Create results from an endpoint, host name and service name.
static basic_resolver_results create(const endpoint_type& endpoint,
const std::string& host_name, const std::string& service_name)
{
basic_resolver_results results;
results.values_.reset(new values_type);
results.values_->push_back(
basic_resolver_entry<InternetProtocol>(
endpoint, host_name, service_name));
return results;
}
// Create results from a sequence of endpoints, host and service name.
template <typename EndpointIterator>
static basic_resolver_results create(
EndpointIterator begin, EndpointIterator end,
const std::string& host_name, const std::string& service_name)
{
basic_resolver_results results;
if (begin != end)
{
results.values_.reset(new values_type);
for (EndpointIterator ep_iter = begin; ep_iter != end; ++ep_iter)
{
results.values_->push_back(
basic_resolver_entry<InternetProtocol>(
*ep_iter, host_name, service_name));
}
}
return results;
}
# if defined(ASIO_WINDOWS_RUNTIME)
// Create results from a Windows Runtime list of EndpointPair objects.
static basic_resolver_results create(
Windows::Foundation::Collections::IVectorView<
Windows::Networking::EndpointPair^>^ endpoints,
const asio::detail::addrinfo_type& hints,
const std::string& host_name, const std::string& service_name)
{
basic_resolver_results results;
if (endpoints->Size)
{
results.values_.reset(new values_type);
for (unsigned int i = 0; i < endpoints->Size; ++i)
{
auto pair = endpoints->GetAt(i);
if (hints.ai_family == ASIO_OS_DEF(AF_INET)
&& pair->RemoteHostName->Type
!= Windows::Networking::HostNameType::Ipv4)
continue;
if (hints.ai_family == ASIO_OS_DEF(AF_INET6)
&& pair->RemoteHostName->Type
!= Windows::Networking::HostNameType::Ipv6)
continue;
results.values_->push_back(
basic_resolver_entry<InternetProtocol>(
typename InternetProtocol::endpoint(
ip::make_address(
asio::detail::winrt_utils::string(
pair->RemoteHostName->CanonicalName)),
asio::detail::winrt_utils::integer(
pair->RemoteServiceName)),
host_name, service_name));
}
}
return results;
}
# endif // defined(ASIO_WINDOWS_RUNTIME)
#endif // !defined(GENERATING_DOCUMENTATION)
/// Get the number of entries in the results range.
size_type size() const ASIO_NOEXCEPT
{
return this->values_->size();
}
/// Get the maximum number of entries permitted in a results range.
size_type max_size() const ASIO_NOEXCEPT
{
return this->values_->max_size();
}
/// Determine whether the results range is empty.
bool empty() const ASIO_NOEXCEPT
{
return this->values_->empty();
}
/// Obtain a begin iterator for the results range.
const_iterator begin() const
{
basic_resolver_results tmp(*this);
tmp.index_ = 0;
return tmp;
}
/// Obtain an end iterator for the results range.
const_iterator end() const
{
return const_iterator();
}
/// Obtain a begin iterator for the results range.
const_iterator cbegin() const
{
return begin();
}
/// Obtain an end iterator for the results range.
const_iterator cend() const
{
return end();
}
/// Swap the results range with another.
void swap(basic_resolver_results& that) ASIO_NOEXCEPT
{
if (this != &that)
{
this->values_.swap(that.values_);
std::size_t index = this->index_;
this->index_ = that.index_;
that.index_ = index;
}
}
/// Test two iterators for equality.
friend bool operator==(const basic_resolver_results& a,
const basic_resolver_results& b)
{
return a.equal(b);
}
/// Test two iterators for inequality.
friend bool operator!=(const basic_resolver_results& a,
const basic_resolver_results& b)
{
return !a.equal(b);
}
private:
typedef std::vector<basic_resolver_entry<InternetProtocol> > values_type;
};
} // namespace ip
} // namespace asio
#include "asio/detail/pop_options.hpp"
#endif // ASIO_IP_BASIC_RESOLVER_RESULTS_HPP
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