forked from premiere/premiere-libtorrent
97 lines
2.8 KiB
C++
97 lines
2.8 KiB
C++
/*
|
|
|
|
Copyright (c) 2013-2016, Arvid Norberg
|
|
All rights reserved.
|
|
|
|
Redistribution and use in source and binary forms, with or without
|
|
modification, are permitted provided that the following conditions
|
|
are met:
|
|
|
|
* Redistributions of source code must retain the above copyright
|
|
notice, this list of conditions and the following disclaimer.
|
|
* Redistributions in binary form must reproduce the above copyright
|
|
notice, this list of conditions and the following disclaimer in
|
|
the documentation and/or other materials provided with the distribution.
|
|
* Neither the name of the author nor the names of its
|
|
contributors may be used to endorse or promote products derived
|
|
from this software without specific prior written permission.
|
|
|
|
THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
|
|
AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
|
|
IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
|
|
ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR CONTRIBUTORS BE
|
|
LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
|
|
CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
|
|
SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
|
|
INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
|
|
CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
|
|
ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
|
|
POSSIBILITY OF SUCH DAMAGE.
|
|
|
|
*/
|
|
|
|
#ifndef TORRENT_RESOLVER_HPP_INCLUDE
|
|
#define TORRENT_RESOLVER_HPP_INCLUDE
|
|
|
|
#include "libtorrent/aux_/disable_warnings_push.hpp"
|
|
|
|
#include <boost/asio/ip/tcp.hpp>
|
|
|
|
#include "libtorrent/aux_/disable_warnings_pop.hpp"
|
|
|
|
#include <unordered_map>
|
|
#include <functional>
|
|
#include <vector>
|
|
|
|
#include "libtorrent/error_code.hpp"
|
|
#include "libtorrent/io_service.hpp"
|
|
#include "libtorrent/socket.hpp"
|
|
#include "libtorrent/resolver_interface.hpp"
|
|
#include "libtorrent/address.hpp"
|
|
#include "libtorrent/time.hpp"
|
|
|
|
namespace libtorrent
|
|
{
|
|
|
|
struct TORRENT_EXTRA_EXPORT resolver final : resolver_interface
|
|
{
|
|
resolver(io_service& ios);
|
|
|
|
virtual void async_resolve(std::string const& host, int flags
|
|
, callback_t const& h) override;
|
|
|
|
virtual void abort() override;
|
|
|
|
private:
|
|
|
|
void on_lookup(error_code const& ec, tcp::resolver::iterator i
|
|
, resolver_interface::callback_t h, std::string hostname);
|
|
|
|
struct dns_cache_entry
|
|
{
|
|
time_point last_seen;
|
|
std::vector<address> addresses;
|
|
};
|
|
|
|
using cache_t = std::unordered_map<std::string, dns_cache_entry>;
|
|
cache_t m_cache;
|
|
io_service& m_ios;
|
|
|
|
// all lookups in this resolver are aborted on shutdown.
|
|
tcp::resolver m_resolver;
|
|
|
|
// lookups in this resolver are not aborted on shutdown
|
|
tcp::resolver m_critical_resolver;
|
|
|
|
// max number of cached entries
|
|
int m_max_size;
|
|
|
|
// timeout of cache entries
|
|
time_duration m_timeout;
|
|
};
|
|
|
|
}
|
|
|
|
#endif
|
|
|