Add accessors for the amount of transferred data to Transfer classes

[quassel.git] / src / core / coretransfer.cpp

diff --git a/src/core/coretransfer.cpp b/src/core/coretransfer.cpp
index 10d609b..0d454ae 100644 (file)
--- a/src/core/coretransfer.cpp
+++ b/src/core/coretransfer.cpp
@@ -1,5 +1,5 @@
 /***************************************************************************
- *   Copyright (C) 2005-2013 by the Quassel Project                        *
+ *   Copyright (C) 2005-2015 by the Quassel Project                        *
  *   devel@quassel-irc.org                                                 *
  *                                                                         *
  *   This program is free software; you can redistribute it and/or modify  *
@@ -18,24 +18,178 @@
  *   51 Franklin Street, Fifth Floor, Boston, MA  02110-1301, USA.         *
  ***************************************************************************/
 
+#include <QtEndian>
+
+#include <QCoreApplication>
+#include <QTcpSocket>
+
 #include "coretransfer.h"
 
+const qint64 chunkSize = 16 * 1024;
+
 INIT_SYNCABLE_OBJECT(CoreTransfer)
 
 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)
+    : Transfer(direction, nick, fileName, address, port, fileSize, parent),
+    _socket(0),
+    _pos(0),
+    _reading(false)
 {
 
 }
 
 
+quint64 CoreTransfer::transferred() const
+{
+    return _pos;
+}
+
+
+void CoreTransfer::cleanUp()
+{
+    if (_socket) {
+        _socket->close();
+        _socket->deleteLater();
+        _socket = 0;
+    }
+
+    _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, SIGNAL(connected()), SLOT(startReceiving()));
+    connect(_socket, SIGNAL(disconnected()), SLOT(onSocketDisconnected()));
+    connect(_socket, SIGNAL(error(QAbstractSocket::SocketError)), SLOT(onSocketError(QAbstractSocket::SocketError)));
+    connect(_socket, SIGNAL(readyRead()), SLOT(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();
+        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;
+}