src/base/net/reverseresolution.h

   1 /*
   2  * Bittorrent Client using Qt and libtorrent.
   3  * Copyright (C) 2006  Christophe Dumez <chris@qbittorrent.org>
   4  *
   5  * This program is free software; you can redistribute it and/or
   6  * modify it under the terms of the GNU General Public License
   7  * as published by the Free Software Foundation; either version 2
   8  * of the License, or (at your option) any later version.
   9  *
  10  * This program is distributed in the hope that it will be useful,
  11  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  12  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  13  * GNU General Public License for more details.
  14  *
  15  * You should have received a copy of the GNU General Public License
  16  * along with this program; if not, write to the Free Software
  17  * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA  02110-1301, USA.
  18  *
  19  * In addition, as a special exception, the copyright holders give permission to
  20  * link this program with the OpenSSL project's "OpenSSL" library (or with
  21  * modified versions of it that use the same license as the "OpenSSL" library),
  22  * and distribute the linked executables. You must obey the GNU General Public
  23  * License in all respects for all of the code used other than "OpenSSL".  If you
  24  * modify file(s), you may extend this exception to your version of the file(s),
  25  * but you are not obligated to do so. If you do not wish to do so, delete this
  26  * exception statement from your version.
  27  */
  28
  29 #pragma once
  30
  31 #include <QCache>
  32 #include <QHostAddress>
  33 #include <QObject>
  34
  35 class QHostInfo;
  36 class QString;
  37
  38 namespace Net
  39 {
  40     class ReverseResolution : public QObject
  41     {
  42         Q_OBJECT
  43         Q_DISABLE_COPY_MOVE(ReverseResolution)
  44
  45     public:
  46         explicit ReverseResolution(QObject *parent = nullptr);
  47         ~ReverseResolution();
  48
  49         void resolve(const QHostAddress &ip);
  50
  51     signals:
  52         void ipResolved(const QHostAddress &ip, const QString &hostname);
  53
  54     private slots:
  55         void hostResolved(const QHostInfo &host);
  56
  57     private:
  58         QHash<int, QHostAddress> m_lookups;  // <LookupID, IP>
  59         QCache<QHostAddress, QString> m_cache;  // <IP, HostName>
  60     };
  61 }