/***************************************************************************
- * Copyright (C) 2005-2013 by the Quassel Project *
+ * Copyright (C) 2005-2019 by the Quassel Project *
* devel@quassel-irc.org *
* *
* This program is free software; you can redistribute it and/or modify *
#include "coretransfer.h"
-INIT_SYNCABLE_OBJECT(CoreTransfer)
+#include <QCoreApplication>
+#include <QTcpSocket>
+#include <QtEndian>
-CoreTransfer::CoreTransfer(Direction direction, const QString &nick, const QString &fileName, const QHostAddress &address, quint16 port, quint64 fileSize, QObject *parent)
+#include "util.h"
+
+const qint64 chunkSize = 16 * 1024;
+
+CoreTransfer::CoreTransfer(Direction direction,
+ const QString& nick,
+ const QString& fileName,
+ const QHostAddress& address,
+ quint16 port,
+ quint64 fileSize,
+ QObject* parent)
: Transfer(direction, nick, fileName, address, port, fileSize, parent)
+ , _socket(nullptr)
+ , _pos(0)
+ , _reading(false)
+{}
+
+quint64 CoreTransfer::transferred() const
+{
+ return _pos;
+}
+
+void CoreTransfer::cleanUp()
{
+ if (_socket) {
+ _socket->close();
+ _socket->deleteLater();
+ _socket = nullptr;
+ }
+ _buffer.clear();
+ _reading = false;
}
+void CoreTransfer::onSocketDisconnected()
+{
+ if (status() == Status::Connecting || status() == Status::Transferring) {
+ setError(tr("Socket closed while still transferring!"));
+ }
+ else
+ cleanUp();
+}
+
+void CoreTransfer::onSocketError(QAbstractSocket::SocketError error)
+{
+ Q_UNUSED(error)
+
+ if (status() == Status::Connecting || status() == Status::Transferring) {
+ setError(tr("DCC connection error: %1").arg(_socket->errorString()));
+ }
+}
void CoreTransfer::requestAccepted(PeerPtr peer)
{
+ if (_peer || !peer || status() != Status::New)
+ return; // transfer was already accepted
+
+ _peer = peer;
+ setStatus(Status::Pending);
+
emit accepted(peer);
-}
+ // FIXME temporary until we have queueing
+ start();
+}
void CoreTransfer::requestRejected(PeerPtr peer)
{
+ if (_peer || status() != Status::New)
+ return;
+
+ _peer = peer;
+ setStatus(Status::Rejected);
+
emit rejected(peer);
}
+
+void CoreTransfer::start()
+{
+ if (!_peer || status() != Status::Pending || direction() != Direction::Receive)
+ return;
+
+ setupConnectionForReceive();
+}
+
+void CoreTransfer::setupConnectionForReceive()
+{
+ if (port() == 0) {
+ setError(tr("Reverse DCC not supported yet!"));
+ return;
+ }
+
+ setStatus(Status::Connecting);
+
+ _socket = new QTcpSocket(this);
+ connect(_socket, &QAbstractSocket::connected, this, &CoreTransfer::startReceiving);
+ connect(_socket, &QAbstractSocket::disconnected, this, &CoreTransfer::onSocketDisconnected);
+ connect(_socket, selectOverload<QAbstractSocket::SocketError>(&QAbstractSocket::error), this, &CoreTransfer::onSocketError);
+ connect(_socket, &QIODevice::readyRead, this, &CoreTransfer::onDataReceived);
+
+ _socket->connectToHost(address(), port());
+}
+
+void CoreTransfer::startReceiving()
+{
+ setStatus(Status::Transferring);
+}
+
+void CoreTransfer::onDataReceived()
+{
+ if (_reading) // since we're spinning the event loop, we may get another readyRead() and thus reentrancy
+ return;
+ _reading = true;
+
+ while (_socket->bytesAvailable()) {
+ QByteArray data = _socket->read(chunkSize);
+ _pos += data.size();
+ emit transferredChanged(transferred());
+ if (!relayData(data, true))
+ return;
+
+ QCoreApplication::processEvents(); // don't block the rest of the core/client communication
+ if (!_socket) // just in case something happened during spinning the event loop that killed our socket
+ return;
+ }
+
+ // Send ack to sender. The DCC protocol only specifies 32 bit values, but modern clients (i.e. those who can send files
+ // larger than 4 GB) will ignore this anyway...
+ quint32 ack = qToBigEndian((quint32)_pos); // qDebug() << Q_FUNC_INFO << _pos;
+ _socket->write((char*)&ack, 4);
+
+ if (_pos > fileSize()) {
+ qWarning() << "DCC Receive: Got more data than expected!";
+ setError(tr("DCC Receive: Got more data than expected!"));
+ }
+ else if (_pos == fileSize()) {
+ qDebug() << "DCC Receive: Transfer finished";
+ if (relayData(QByteArray(), false)) // empty buffer
+ setStatus(Status::Completed);
+ }
+
+ _reading = false;
+}
+
+bool CoreTransfer::relayData(const QByteArray& data, bool requireChunkSize)
+{
+ // safeguard against a disconnecting quasselclient
+ if (!_peer) {
+ setError(tr("DCC Receive: Quassel Client disconnected during transfer!"));
+ return false;
+ }
+ _buffer.append(data);
+
+ // we only want to send data to the client once we have reached the chunksize
+ if (_buffer.size() > 0 && (_buffer.size() >= chunkSize || !requireChunkSize)) {
+ Peer* p = _peer.data();
+ SYNC_OTHER(dataReceived, ARG(p), ARG(_buffer));
+ _buffer.clear();
+ }
+
+ return true;
+}