Qt 5.6 | Qt Network | Torrent Example | connectionmanager.cpp Example File

Qt 5.6.2 Reference Documentation

# connectionmanager.cpp Example File

torrent/connectionmanager.cpp

      /****************************************************************************
      **
      ** Copyright (C) 2015 The Qt Company Ltd.
      ** Contact: http://www.qt.io/licensing/
      **
      ** This file is part of the examples of the Qt Toolkit.
      **
      ** $QT_BEGIN_LICENSE:BSD$
      ** You may use this file under the terms of the BSD license as follows:
      **
      ** "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 Qt Company Ltd 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."
      **
      ** $QT_END_LICENSE$
      **
      ****************************************************************************/

      #include "connectionmanager.h"

      #include <QByteArray>
      #include <QDateTime>

      static const int MaxConnections = 250;

      Q_GLOBAL_STATIC(ConnectionManager, connectionManager)

      ConnectionManager *ConnectionManager::instance()
      {
          return connectionManager();
      }

      bool ConnectionManager::canAddConnection() const
      {
          return (connections.size() < MaxConnections);
      }

      void ConnectionManager::addConnection(PeerWireClient *client)
      {
          connections << client;
      }

      void ConnectionManager::removeConnection(PeerWireClient *client)
      {
          connections.remove(client);
      }

      int ConnectionManager::maxConnections() const
      {
          return MaxConnections;
      }

      QByteArray ConnectionManager::clientId() const
      {
          if (id.isEmpty()) {
              // Generate peer id
              int startupTime = int(QDateTime::currentDateTime().toTime_t());

              id += QString::asprintf("-QT%04x-", QT_VERSION >> 8).toLatin1();
              id += QByteArray::number(startupTime, 10);
              id += QByteArray(20 - id.size(), '-');
          }
          return id;
      }