X-Git-Url: https://git.quassel-irc.org/?p=quassel.git;a=blobdiff_plain;f=src%2Fcore%2Fcoretransfer.cpp;h=46a30a549ca845a382c4864756819b64dec67bac;hp=10d609bae490c5ac5fc72f51ca39c285a802abe1;hb=cc6e7c08709c4e761e2fd9c2e322751015497003;hpb=0d7b511c8510d7fd05d3a704114e34ff37f7a995

diff --git a/src/core/coretransfer.cpp b/src/core/coretransfer.cpp
index 10d609ba..46a30a54 100644
--- a/src/core/coretransfer.cpp
+++ b/src/core/coretransfer.cpp
@@ -1,5 +1,5 @@
 /***************************************************************************
- *   Copyright (C) 2005-2013 by the Quassel Project                        *
+ *   Copyright (C) 2005-2019 by the Quassel Project                        *
  *   devel@quassel-irc.org                                                 *
  *                                                                         *
  *   This program is free software; you can redistribute it and/or modify  *
@@ -20,22 +20,169 @@
 
 #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;
+}