mirror of
https://github.com/qbittorrent/qBittorrent.git
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97 lines
3.1 KiB
C++
97 lines
3.1 KiB
C++
/*
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* Bittorrent Client using Qt4 and libtorrent.
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* Copyright (C) 2006 Christophe Dumez
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*
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* This program is free software; you can redistribute it and/or
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* modify it under the terms of the GNU General Public License
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* as published by the Free Software Foundation; either version 2
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* of the License, or (at your option) any later version.
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*
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License
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* along with this program; if not, write to the Free Software
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* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA.
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*
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* In addition, as a special exception, the copyright holders give permission to
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* link this program with the OpenSSL project's "OpenSSL" library (or with
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* modified versions of it that use the same license as the "OpenSSL" library),
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* and distribute the linked executables. You must obey the GNU General Public
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* License in all respects for all of the code used other than "OpenSSL". If you
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* modify file(s), you may extend this exception to your version of the file(s),
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* but you are not obligated to do so. If you do not wish to do so, delete this
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* exception statement from your version.
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*
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* Contact : chris@qbittorrent.org
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*/
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#ifndef REVERSERESOLUTION_H
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#define REVERSERESOLUTION_H
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#include <QList>
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#include <QCache>
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#include <QDebug>
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#include <QHostInfo>
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#include "misc.h"
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#include <boost/version.hpp>
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#if BOOST_VERSION < 103500
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#include <libtorrent/asio/ip/tcp.hpp>
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#else
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#include <boost/asio/ip/tcp.hpp>
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#endif
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const int CACHE_SIZE = 500;
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class ReverseResolution: public QObject {
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Q_OBJECT
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Q_DISABLE_COPY(ReverseResolution)
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public:
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explicit ReverseResolution(QObject* parent): QObject(parent) {
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m_cache.setMaxCost(CACHE_SIZE);
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}
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~ReverseResolution() {
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qDebug("Deleting host name resolver...");
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}
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void resolve(const libtorrent::asio::ip::tcp::endpoint &ip) {
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boost::system::error_code ec;
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const QString ip_str = misc::toQString(ip.address().to_string(ec));
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if (ec) return;
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if (m_cache.contains(ip_str)) {
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qDebug("Resolved host name using cache");
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emit ip_resolved(ip_str, *m_cache.object(ip_str));
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return;
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}
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// Actually resolve the ip
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QHostInfo::lookupHost(ip_str, this, SLOT(hostResolved(QHostInfo)));
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}
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signals:
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void ip_resolved(const QString &ip, const QString &hostname);
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private slots:
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void hostResolved(const QHostInfo& host) {
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if (host.error() == QHostInfo::NoError) {
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const QString hostname = host.hostName();
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if (host.addresses().isEmpty() || hostname.isEmpty()) return;
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const QString ip = host.addresses().first().toString();
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if (hostname != ip) {
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//qDebug() << Q_FUNC_INFO << ip << QString("->") << hostname;
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m_cache.insert(ip, new QString(hostname));
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emit ip_resolved(ip, hostname);
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}
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}
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}
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private:
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QCache<QString, QString> m_cache;
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};
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#endif // REVERSERESOLUTION_H
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