97551d09ff
Summary: If the identity packet is split across two packets, then save it until we get a notification that more data is available for reading over the bluetooth link. Test Plan: Connect a phone and laptop over Bluetooth, and verify that both the phone and laptop are able to see each other, and that either side can start and successfully go through the pairing process. Reviewers: #kde_connect, mtijink Reviewed By: #kde_connect, mtijink Subscribers: mtijink, kdeconnect Tags: #kde_connect Differential Revision: https://phabricator.kde.org/D17789
326 lines
11 KiB
C++
326 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 <http://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 <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(QString("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(mServiceDiscoveryAgent, SIGNAL(finished()), this, SLOT(serviceDiscoveryFinished()));
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connect(connectTimer, SIGNAL(timeout()), mServiceDiscoveryAgent, SLOT(start()));
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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, "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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//I'm the new device and I found an existing device
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void BluetoothLinkProvider::serviceDiscoveryFinished()
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{
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const QList<QBluetoothServiceInfo> services = mServiceDiscoveryAgent->discoveredServices();
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for (QBluetoothServiceInfo info : services) {
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if (mSockets.contains(info.device().address())) {
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continue;
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}
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QBluetoothSocket* socket = new QBluetoothSocket(QBluetoothServiceInfo::RfcommProtocol);
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connect(socket, SIGNAL(connected()), this, SLOT(clientConnected()));
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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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}
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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()
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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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qCDebug(KDECONNECT_CORE()) << "Connected to" << socket->peerAddress();
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if (mSockets.contains(socket->peerAddress())) {
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qCWarning(KDECONNECT_CORE()) << "Duplicate connection to" << socket->peerAddress();
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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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mSockets.insert(socket->peerAddress(), socket);
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disconnect(socket, SIGNAL(connected()), this, SLOT(clientConnected()));
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connect(socket, SIGNAL(readyRead()), this, SLOT(clientIdentityReceived()));
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connect(socket, SIGNAL(disconnected()), this, SLOT(socketDisconnected()));
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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()
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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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QByteArray identityArray;
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if (socket->property("identityArray").isValid()) {
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identityArray = socket->property("identityArray").toByteArray();
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}
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while (!identityArray.contains('\n') && socket->bytesAvailable() > 0) {
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identityArray += socket->readAll();
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}
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if (!identityArray.contains('\n')) {
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// This method will get retriggered when more data is available.
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socket->setProperty("identityArray", identityArray);
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return;
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}
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socket->setProperty("identityArray", QVariant());
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disconnect(socket, SIGNAL(readyRead()), this, SLOT(clientIdentityReceived()));
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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(socket->peerAddress());
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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" << socket->peerAddress();
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disconnect(socket, SIGNAL(error(QBluetoothSocket::SocketError)), this, SLOT(connectError()));
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const QString& deviceId = receivedPacket.get<QString>("deviceId");
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BluetoothDeviceLink* deviceLink = new BluetoothDeviceLink(deviceId, this, 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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if (mSockets.contains(socket->peerAddress())) {
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qCDebug(KDECONNECT_CORE()) << "Duplicate connection from" << socket->peerAddress();
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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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connect(socket, SIGNAL(readyRead()), this, SLOT(serverDataReceived()));
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connect(socket, SIGNAL(error(QBluetoothSocket::SocketError)), this, SLOT(connectError()));
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connect(socket, SIGNAL(disconnected()), this, SLOT(socketDisconnected()));
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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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mSockets.insert(socket->peerAddress(), socket);
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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()
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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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QByteArray identityArray;
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if (socket->property("identityArray").isValid()) {
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identityArray = socket->property("identityArray").toByteArray();
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}
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while (!identityArray.contains('\n') && socket->bytesAvailable() > 0) {
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identityArray += socket->readAll();
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}
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if (!identityArray.contains('\n')) {
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// This method will get retriggered when more data is available.
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socket->setProperty("identityArray", identityArray);
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return;
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}
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socket->setProperty("identityArray", QVariant());
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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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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(socket->peerAddress());
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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" << socket->peerAddress();
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const QString& deviceId = receivedPacket.get<QString>("deviceId");
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BluetoothDeviceLink* deviceLink = new BluetoothDeviceLink(deviceId, this, 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()
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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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disconnect(socket, SIGNAL(disconnected()), this, SLOT(socketDisconnected()));
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mSockets.remove(mSockets.key(socket));
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}
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BluetoothLinkProvider::~BluetoothLinkProvider()
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{
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}
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