329 lines
11 KiB
C++
329 lines
11 KiB
C++
/**
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* Copyright 2016 Saikrishna Arcot <saiarcot895@gmail.com>
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*
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* This program is free software; you can redistribute it and/or
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* modify it under the terms of the GNU General Public License as
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* published by the Free Software Foundation; either version 2 of
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* the License or (at your option) version 3 or any later version
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* accepted by the membership of KDE e.V. (or its successor approved
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* by the membership of KDE e.V.), which shall act as a proxy
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* defined in Section 14 of version 3 of the license.
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*
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License
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* along with this program. If not, see <https://www.gnu.org/licenses/>.
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*/
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#include "bluetoothlinkprovider.h"
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#include "core_debug.h"
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#include "connectionmultiplexer.h"
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#include "multiplexchannel.h"
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#include <KSharedConfig>
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#include <KConfigGroup>
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#include <QDBusArgument>
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#include <QDBusConnection>
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#include <QDBusInterface>
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#include <QDBusReply>
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#include <QBluetoothServiceInfo>
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#include "bluetoothdevicelink.h"
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BluetoothLinkProvider::BluetoothLinkProvider()
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{
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mServiceUuid = QBluetoothUuid(QStringLiteral("185f3df4-3268-4e3f-9fca-d4d5059915bd"));
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connectTimer = new QTimer(this);
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connectTimer->setInterval(30000);
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connectTimer->setSingleShot(false);
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mServiceDiscoveryAgent = new QBluetoothServiceDiscoveryAgent(this);
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mServiceDiscoveryAgent->setUuidFilter(mServiceUuid);
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connect(connectTimer, &QTimer::timeout, this, [this]() {
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mServiceDiscoveryAgent->start();
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});
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connect(mServiceDiscoveryAgent, &QBluetoothServiceDiscoveryAgent::serviceDiscovered, this, &BluetoothLinkProvider::serviceDiscovered);
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}
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void BluetoothLinkProvider::onStart()
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{
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QBluetoothLocalDevice localDevice;
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if (!localDevice.isValid()) {
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qCWarning(KDECONNECT_CORE) << "No local bluetooth adapter found";
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return;
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}
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mBluetoothServer = new QBluetoothServer(QBluetoothServiceInfo::RfcommProtocol, this);
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mBluetoothServer->setSecurityFlags(QBluetooth::Encryption | QBluetooth::Secure);
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connect(mBluetoothServer, SIGNAL(newConnection()), this, SLOT(serverNewConnection()));
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mServiceDiscoveryAgent->start();
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connectTimer->start();
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mKdeconnectService = mBluetoothServer->listen(mServiceUuid, QStringLiteral("KDE Connect"));
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}
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void BluetoothLinkProvider::onStop()
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{
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if (!mBluetoothServer) {
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return;
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}
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connectTimer->stop();
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mKdeconnectService.unregisterService();
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mBluetoothServer->close();
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mBluetoothServer->deleteLater();
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}
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//I'm in a new network, let's be polite and introduce myself
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void BluetoothLinkProvider::onNetworkChange()
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{
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}
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void BluetoothLinkProvider::connectError()
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{
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QBluetoothSocket* socket = qobject_cast<QBluetoothSocket*>(sender());
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if (!socket) return;
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qCWarning(KDECONNECT_CORE) << "Couldn't connect to socket:" << socket->errorString();
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disconnect(socket, SIGNAL(connected()), this, SLOT(clientConnected()));
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disconnect(socket, SIGNAL(readyRead()), this, SLOT(serverDataReceived()));
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disconnect(socket, SIGNAL(error(QBluetoothSocket::SocketError)), this, SLOT(connectError()));
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mSockets.remove(socket->peerAddress());
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socket->deleteLater();
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}
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void BluetoothLinkProvider::addLink(BluetoothDeviceLink* deviceLink, const QString& deviceId)
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{
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QMap< QString, DeviceLink* >::iterator oldLinkIterator = mLinks.find(deviceId);
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if (oldLinkIterator != mLinks.end()) {
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DeviceLink* oldLink = oldLinkIterator.value();
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disconnect(oldLink, SIGNAL(destroyed(QObject*)),
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this, SLOT(deviceLinkDestroyed(QObject*)));
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oldLink->deleteLater();
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mLinks.erase(oldLinkIterator);
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}
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mLinks[deviceId] = deviceLink;
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}
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void BluetoothLinkProvider::serviceDiscovered(const QBluetoothServiceInfo& old_info) {
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auto info = old_info;
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info.setServiceUuid(mServiceUuid);
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if (mSockets.contains(info.device().address())) {
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return;
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}
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QBluetoothSocket* socket = new QBluetoothSocket(QBluetoothServiceInfo::RfcommProtocol);
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//Delay before sending data
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QPointer<QBluetoothSocket> deleteableSocket = socket;
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connect(socket, &QBluetoothSocket::connected, this, [this,deleteableSocket]() {
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QTimer::singleShot(500, this, [this,deleteableSocket]() {
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clientConnected(deleteableSocket);
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});
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});
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connect(socket, SIGNAL(error(QBluetoothSocket::SocketError)), this, SLOT(connectError()));
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socket->connectToService(info);
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qCDebug(KDECONNECT_CORE()) << "Connecting to" << info.device().address();
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if (socket->error() != QBluetoothSocket::NoSocketError) {
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qCWarning(KDECONNECT_CORE) << "Socket connection error:" << socket->errorString();
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}
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}
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//I'm the new device and I'm connected to the existing device. Time to get data.
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void BluetoothLinkProvider::clientConnected(QPointer<QBluetoothSocket> socket)
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{
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if (!socket) return;
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auto peer = socket->peerAddress();
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qCDebug(KDECONNECT_CORE()) << "Connected to" << peer;
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if (mSockets.contains(socket->peerAddress())) {
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qCWarning(KDECONNECT_CORE()) << "Duplicate connection to" << peer;
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socket->close();
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socket->deleteLater();
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return;
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}
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ConnectionMultiplexer *multiplexer = new ConnectionMultiplexer(socket, this);
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mSockets.insert(peer, multiplexer);
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disconnect(socket, nullptr, this, nullptr);
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auto channel = QSharedPointer<MultiplexChannel>{multiplexer->getDefaultChannel().release()};
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connect(channel.data(), &MultiplexChannel::readyRead, this, [this,peer,channel] () { clientIdentityReceived(peer, channel); });
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connect(channel.data(), &MultiplexChannel::aboutToClose, this, [this,peer,channel] () { socketDisconnected(peer, channel.data()); });
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if (channel->bytesAvailable()) clientIdentityReceived(peer, channel);
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if (!channel->isOpen()) socketDisconnected(peer, channel.data());
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}
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//I'm the new device and the existing device sent me data.
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void BluetoothLinkProvider::clientIdentityReceived(const QBluetoothAddress &peer, QSharedPointer<MultiplexChannel> socket)
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{
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socket->startTransaction();
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QByteArray identityArray = socket->readLine();
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if (identityArray.isEmpty()) {
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socket->rollbackTransaction();
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return;
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}
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socket->commitTransaction();
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disconnect(socket.data(), &MultiplexChannel::readyRead, this, nullptr);
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NetworkPacket receivedPacket;
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bool success = NetworkPacket::unserialize(identityArray, &receivedPacket);
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if (!success || receivedPacket.type() != PACKET_TYPE_IDENTITY) {
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qCWarning(KDECONNECT_CORE) << "Not an identity packet";
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mSockets.remove(peer);
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socket->close();
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socket->deleteLater();
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return;
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}
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qCDebug(KDECONNECT_CORE()) << "Received identity packet from" << peer;
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//TODO?
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//disconnect(socket, SIGNAL(error(QBluetoothSocket::SocketError)), this, SLOT(connectError()));
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const QString& deviceId = receivedPacket.get<QString>(QStringLiteral("deviceId"));
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BluetoothDeviceLink* deviceLink = new BluetoothDeviceLink(deviceId, this, mSockets[peer], socket);
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NetworkPacket np2;
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NetworkPacket::createIdentityPacket(&np2);
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success = deviceLink->sendPacket(np2);
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if (success) {
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qCDebug(KDECONNECT_CORE) << "Handshaking done (I'm the new device)";
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connect(deviceLink, SIGNAL(destroyed(QObject*)),
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this, SLOT(deviceLinkDestroyed(QObject*)));
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Q_EMIT onConnectionReceived(receivedPacket, deviceLink);
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//We kill any possible link from this same device
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addLink(deviceLink, deviceId);
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} else {
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// Connection might be lost. Delete it.
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delete deviceLink;
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}
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//We don't delete the socket because now it's owned by the BluetoothDeviceLink
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}
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//I'm the existing device, a new device is kindly introducing itself.
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void BluetoothLinkProvider::serverNewConnection()
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{
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QBluetoothSocket* socket = mBluetoothServer->nextPendingConnection();
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qCDebug(KDECONNECT_CORE()) << "Received connection from" << socket->peerAddress();
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QBluetoothAddress peer = socket->peerAddress();
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if (mSockets.contains(peer)) {
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qCDebug(KDECONNECT_CORE()) << "Duplicate connection from" << peer;
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socket->close();
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socket->deleteLater();
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return;
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}
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ConnectionMultiplexer *multiplexer = new ConnectionMultiplexer(socket, this);
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mSockets.insert(peer, multiplexer);
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disconnect(socket, nullptr, this, nullptr);
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auto channel = QSharedPointer<MultiplexChannel>{multiplexer->getDefaultChannel().release()};
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connect(channel.data(), &MultiplexChannel::readyRead, this, [this,peer,channel] () { serverDataReceived(peer, channel); });
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connect(channel.data(), &MultiplexChannel::aboutToClose, this, [this,peer,channel] () { socketDisconnected(peer, channel.data()); });
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if (!channel->isOpen()) {
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socketDisconnected(peer, channel.data());
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return;
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}
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NetworkPacket np2;
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NetworkPacket::createIdentityPacket(&np2);
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socket->write(np2.serialize());
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qCDebug(KDECONNECT_CORE()) << "Sent identity packet to" << socket->peerAddress();
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}
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//I'm the existing device and this is the answer to my identity packet (data received)
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void BluetoothLinkProvider::serverDataReceived(const QBluetoothAddress &peer, QSharedPointer<MultiplexChannel> socket)
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{
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QByteArray identityArray;
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socket->startTransaction();
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identityArray = socket->readLine();
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if (identityArray.isEmpty()) {
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socket->rollbackTransaction();
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return;
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}
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socket->commitTransaction();
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disconnect(socket.data(), &MultiplexChannel::readyRead, this, nullptr);
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NetworkPacket receivedPacket;
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bool success = NetworkPacket::unserialize(identityArray, &receivedPacket);
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if (!success || receivedPacket.type() != PACKET_TYPE_IDENTITY) {
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qCWarning(KDECONNECT_CORE) << "Not an identity packet.";
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mSockets.remove(peer);
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socket->close();
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socket->deleteLater();
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return;
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}
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qCDebug(KDECONNECT_CORE()) << "Received identity packet from" << peer;
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const QString& deviceId = receivedPacket.get<QString>(QStringLiteral("deviceId"));
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BluetoothDeviceLink* deviceLink = new BluetoothDeviceLink(deviceId, this, mSockets[peer], socket);
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connect(deviceLink, SIGNAL(destroyed(QObject*)),
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this, SLOT(deviceLinkDestroyed(QObject*)));
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Q_EMIT onConnectionReceived(receivedPacket, deviceLink);
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addLink(deviceLink, deviceId);
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}
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void BluetoothLinkProvider::deviceLinkDestroyed(QObject* destroyedDeviceLink)
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{
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const QString id = destroyedDeviceLink->property("deviceId").toString();
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qCDebug(KDECONNECT_CORE()) << "Device disconnected:" << id;
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QMap< QString, DeviceLink* >::iterator oldLinkIterator = mLinks.find(id);
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if (oldLinkIterator != mLinks.end() && oldLinkIterator.value() == destroyedDeviceLink) {
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mLinks.erase(oldLinkIterator);
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}
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}
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void BluetoothLinkProvider::socketDisconnected(const QBluetoothAddress &peer, MultiplexChannel *socket)
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{
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qCDebug(KDECONNECT_CORE()) << "Disconnected";
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disconnect(socket, nullptr, this, nullptr);
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mSockets.remove(peer);
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}
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BluetoothLinkProvider::~BluetoothLinkProvider()
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{
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}
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