src/base/net/geoipdatabase.h

   1 /*
   2  * Bittorrent Client using Qt and libtorrent.
   3  * Copyright (C) 2015  Vladimir Golovnev <glassez@yandex.ru>
   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 <QtGlobal>
  32 #include <QCoreApplication>
  33 #include <QDateTime>
  34 #include <QHash>
  35 #include <QVariant>
  36
  37 #include "base/pathfwd.h"
  38
  39 class QByteArray;
  40 class QHostAddress;
  41 class QString;
  42
  43 struct DataFieldDescriptor;
  44
  45 class GeoIPDatabase
  46 {
  47     Q_DISABLE_COPY_MOVE(GeoIPDatabase)
  48     Q_DECLARE_TR_FUNCTIONS(GeoIPDatabase)
  49
  50 public:
  51     static GeoIPDatabase *load(const Path &filename, QString &error);
  52     static GeoIPDatabase *load(const QByteArray &data, QString &error);
  53
  54     ~GeoIPDatabase();
  55
  56     QString type() const;
  57     quint16 ipVersion() const;
  58     QDateTime buildEpoch() const;
  59     QString lookup(const QHostAddress &hostAddr) const;
  60
  61 private:
  62     explicit GeoIPDatabase(quint32 size);
  63
  64     bool parseMetadata(const QVariantHash &metadata, QString &error);
  65     bool loadDB(QString &error) const;
  66     QVariantHash readMetadata() const;
  67
  68     QVariant readDataField(quint32 &offset) const;
  69     bool readDataFieldDescriptor(quint32 &offset, DataFieldDescriptor &out) const;
  70     void fromBigEndian(uchar *buf, quint32 len) const;
  71     QVariant readMapValue(quint32 &offset, quint32 count) const;
  72     QVariant readArrayValue(quint32 &offset, quint32 count) const;
  73
  74     template <typename T> QVariant readPlainValue(quint32 &offset, quint8 len) const;
  75
  76     // Metadata
  77     quint16 m_ipVersion = 0;
  78     quint16 m_recordSize = 0;
  79     quint32 m_nodeCount = 0;
  80     int m_nodeSize = 0;
  81     int m_indexSize = 0;
  82     int m_recordBytes = 0;
  83     QDateTime m_buildEpoch;
  84     QString m_dbType;
  85     // Search data
  86     mutable QHash<quint32, QString> m_countries;
  87     quint32 m_size = 0;
  88     uchar *m_data = nullptr;
  89 };