bool QNativeSocketEnginePrivate::checkProxy(const QHostAddress &address)
{
if (address.isLoopback())
return true;
#if !defined(QT_NO_NETWORKPROXY)
QObject *parent = q_func()->parent();
QNetworkProxy proxy;
if (QAbstractSocket *socket = qobject_cast<QAbstractSocket *>(parent)) {
proxy = socket->proxy();
} else if (QTcpServer *server = qobject_cast<QTcpServer *>(parent)) {
proxy = server->proxy();
} else {
// no parent -> no proxy
return true;
}
if (proxy.type() == QNetworkProxy::DefaultProxy)
proxy = QNetworkProxy::applicationProxy();
if (proxy.type() != QNetworkProxy::DefaultProxy &&
proxy.type() != QNetworkProxy::NoProxy) {
// QNativeSocketEngine doesn't do proxies
setError(QAbstractSocket::UnsupportedSocketOperationError,
QNativeSocketEnginePrivate::InvalidProxyTypeString);
return false;
}
#endif
return true;
}
///\brief Returns true if the address is accessible from other devices.
bool TorcNetwork::IsExternal(const QHostAddress &Address, bool IncludeLinkLocal /* = false*/)
{
if (Address.isNull() || Address.isLoopback())
return false;
if (Address.isInSubnet(Address.protocol() == QAbstractSocket::IPv4Protocol ? gIPv4LinkLocal : gIPv6LinkLocal))
return IncludeLinkLocal;
return true;
}
void TcpServerDevice::broadcast(const QByteArray &data)
{
const QHostAddress address = m_server->serverAddress();
// broadcast announcement only if we are actually listinging to remote connections
#if QT_VERSION < QT_VERSION_CHECK(5, 0, 0)
if (address.toString() == "127.0.0.1" || address.toString() == "::1")
#else
if (address.isLoopback())
#endif
return;
m_broadcastSocket->writeDatagram(data.data(), data.size(), QHostAddress::Broadcast, Server::broadcastPort());
}
//I'm the existing device, a new device is kindly introducing itself.
//I will create a TcpSocket and try to connect. This can result in either connected() or connectError().
void LanLinkProvider::newUdpConnection() //udpBroadcastReceived
{
while (mUdpSocket.hasPendingDatagrams()) {
QByteArray datagram;
datagram.resize(mUdpSocket.pendingDatagramSize());
QHostAddress sender;
mUdpSocket.readDatagram(datagram.data(), datagram.size(), &sender);
if (sender.isLoopback() && !mTestMode)
continue;
NetworkPackage* receivedPackage = new NetworkPackage("");
bool success = NetworkPackage::unserialize(datagram, receivedPackage);
//qCDebug(KDECONNECT_CORE) << "udp connection from " << receivedPackage->;
//qCDebug(KDECONNECT_CORE) << "Datagram " << datagram.data() ;
if (!success || receivedPackage->type() != PACKAGE_TYPE_IDENTITY) {
delete receivedPackage;
continue;
}
if (receivedPackage->get<QString>("deviceId") == KdeConnectConfig::instance()->deviceId()) {
//qCDebug(KDECONNECT_CORE) << "Ignoring my own broadcast";
delete receivedPackage;
continue;
}
int tcpPort = receivedPackage->get<int>("tcpPort", port);
//qCDebug(KDECONNECT_CORE) << "Received Udp identity package from" << sender << " asking for a tcp connection on port " << tcpPort;
QSslSocket* socket = new QSslSocket(this);
receivedIdentityPackages[socket].np = receivedPackage;
receivedIdentityPackages[socket].sender = sender;
connect(socket, SIGNAL(connected()), this, SLOT(connected()));
connect(socket, SIGNAL(error(QAbstractSocket::SocketError)), this, SLOT(connectError()));
socket->connectToHost(sender, tcpPort);
}
}
static bool isBypassed(const QString &host, const QStringList &bypassList)
{
if (host.isEmpty())
return false;
bool isSimple = !host.contains(QLatin1Char('.')) && !host.contains(QLatin1Char(':'));
QHostAddress ipAddress;
bool isIpAddress = ipAddress.setAddress(host);
// always exclude loopback
if (isIpAddress && ipAddress.isLoopback())
return true;
// does it match the list of exclusions?
foreach (const QString &entry, bypassList) {
if (entry == QLatin1String("<local>")) {
if (isSimple)
return true;
if (isIpAddress) {
//exclude all local subnets
foreach (const QNetworkInterface &iface, QNetworkInterface::allInterfaces()) {
foreach (const QNetworkAddressEntry netaddr, iface.addressEntries()) {
if (ipAddress.isInSubnet(netaddr.ip(), netaddr.prefixLength())) {
return true;
}
}
}
}
}
if (isIpAddress && ipAddress.isInSubnet(QHostAddress::parseSubnet(entry))) {
return true; // excluded
} else {
// do wildcard matching
QRegExp rx(entry, Qt::CaseInsensitive, QRegExp::Wildcard);
if (rx.exactMatch(host))
return true;
}
}
/*! \brief Convert an IP address to a string literal.
*
* For an IPv4 address, this is a no-op. For IPv6 addresses, we need to remove the scope Id if present
* and wrap the remainder in braces.
*/
QString TorcNetwork::IPAddressToLiteral(const QHostAddress &Address, int Port, bool UseLocalhost /* = true*/)
{
QString result;
if (UseLocalhost && Address.isLoopback())
{
result = QString("localhost");
}
else if (Address.protocol() == QAbstractSocket::IPv4Protocol)
{
result = Address.toString();
}
else
{
QHostAddress address(Address);
address.setScopeId("");
result = "[" + address.toString() +"]";
}
if (Port)
result += ":" + QString::number(Port);
return result;
}
QUrl TcpServerDevice::externalAddress() const
{
const QHostAddress address(m_server->serverAddress());
QString myHost;
#if QT_VERSION < QT_VERSION_CHECK(5, 0, 0)
if (address == QHostAddress::LocalHost || address == QHostAddress::LocalHostIPv6) {
#else
if (address.isLoopback()) {
#endif
myHost = address.toString();
} else {
foreach (const QNetworkInterface &inter, QNetworkInterface::allInterfaces()) {
if (!(inter.flags() & QNetworkInterface::IsUp)
|| !(inter.flags() & QNetworkInterface::IsRunning)
|| (inter.flags() & QNetworkInterface::IsLoopBack))
continue;
foreach (const QNetworkAddressEntry &addrEntry, inter.addressEntries()) {
const QHostAddress addr = addrEntry.ip();
// Return the ip according to the listening server protocol.
if (addr.protocol() != m_server->serverAddress().protocol()
|| !addr.scopeId().isEmpty())
continue;
myHost = addr.toString();
break;
}
if (!myHost.isEmpty())
break;
}
}
// if localhost is all we got, use that rather than nothing
if (myHost.isEmpty()) {
switch (m_server->serverAddress().protocol()) {
case QAbstractSocket::IPv4Protocol:
#if QT_VERSION >= QT_VERSION_CHECK(5, 0, 0)
case QAbstractSocket::AnyIPProtocol:
#endif
myHost = QHostAddress(QHostAddress::LocalHost).toString();
break;
case QAbstractSocket::IPv6Protocol:
myHost = QHostAddress(QHostAddress::LocalHostIPv6).toString();
break;
case QAbstractSocket::UnknownNetworkLayerProtocol:
Q_ASSERT_X(false, "TcpServerDevice::externalAddress", "unknown TCP protocol");
break;
}
}
QUrl url;
url.setScheme(QStringLiteral("tcp"));
url.setHost(myHost);
url.setPort(m_server->serverPort());
return url;
}
void TcpServerDevice::broadcast(const QByteArray &data)
{
const QHostAddress address = m_server->serverAddress();
// broadcast announcement only if we are actually listinging to remote connections
#if QT_VERSION < QT_VERSION_CHECK(5, 0, 0)
if (address == QHostAddress::LocalHost || address == QHostAddress::LocalHostIPv6)
#else
if (address.isLoopback())
#endif
return;
m_broadcastSocket->writeDatagram(data.data(),
data.size(), QHostAddress::Broadcast, Server::broadcastPort());
}
void Discover::acceptRecords (QList<Record> records, bool removeThem, QString senderScope, QString senderAddress, QString senderPort)
{
// TODO
// This function gets its own copy of records
// This loop edits each item so it can be used after
for (Record& record : records)
{
// Preprocess the record before considering it
Record::decompressReserved(record);
// Set the scope based on the address if included, otherwise scope of sender
QHostAddress recordAddress;
if (record.has("Address")) recordAddress.setAddress(record["Address"]);
if (recordAddress.protocol()!=QAbstractSocket::IPv4Protocol) recordAddress = QHostAddress::Null;
if (recordAddress==QHostAddress::Broadcast) recordAddress = QHostAddress::Null;
if (recordAddress==QHostAddress::AnyIPv4) recordAddress = QHostAddress::Null;
if (recordAddress.isNull())
{
record["Scope"] = senderScope;
}
else
{
if (recordAddress.isLoopback()) record["Scope"] = "Loopback";
else if (addressIsLocal(recordAddress)) record["Scope"] = "Local";
else record["Scope"] = "Global";
}
if (record["Address"].isEmpty()) record["Address"] = senderAddress; // Sender may override these
if (record["Port"].isEmpty()) record["Port"] = senderPort; // Sender may override these
// TODO Extract a custom expiration duration so each record can have its own
if (removeThem)
{
// See if it's new
if (foundRecords.contains(record))
{
logDebug(QString("Record Departed: %1").arg(record.toString()));
foundRecords.remove(record);
emit recordLost(record);
}
}
else
{
// See if it's new
if (not foundRecords.contains(record) and passesFilters(record))
{
logDebug(QString("Found Record: %1").arg(record.toString()));
emit recordFound(record);
}
// Reset the timer
foundRecords[record] = QDateTime::currentMSecsSinceEpoch() + 2500; // Set the expire time
}
expireTimer->start(0); // In case the next expiration time was changed
}
// Server: Forward global departures to other global peers
if (mServerMode and removeThem and senderScope == "Global")
{
QByteArray datagram("DSDD");
datagram += makeDatagram(records, false);
for (Record& record : foundRecords.keys())
if (record["Scope"] == "Global")
{
bool ok;
globalSocket->writeDatagram(datagram, QHostAddress(record["Address"]), record["Port"].toUInt(&ok, 10));
}
}
}
void Discover::readDatagrams ()
{
QUdpSocket* socket = qobject_cast<QUdpSocket*>(QObject::sender());
if (socket)
while (socket->hasPendingDatagrams())
{
// Read it to a buffer
QByteArray datagram;
datagram.resize(socket->pendingDatagramSize());
QHostAddress sender;
quint16 senderPort;
socket->readDatagram(datagram.data(), datagram.size(), &sender, &senderPort);
// Check the prefix
bool respond = false;
bool removeThem = false;
if (datagram.startsWith("DSDA")) respond = false; // Announcement, do not respond
else if (datagram.startsWith("DSDR")) respond = true; // Request, do respond
else if (datagram.startsWith("DSDD")) removeThem = true; // This is a departure, remove records following
else
{
// This datagram isn't written for Discover, pass it on
QList<Record> matchingRecords;
for (Record record : foundRecords.keys())
{
if (record.has("Address") and record["Address"]==sender.toString())
if (record.has("Port") and record["Port"]==QString::number(senderPort))
matchingRecords.append(record);
}
emit gotDatagram(datagram, sender, senderPort, matchingRecords);
continue;
}
datagram.remove(0, 4);
// Determine the scope of the sender
// See if it's this machine
QString scope("Global");
if (sender.isLoopback())
{
scope = "Loopback";
}
else if (sender.protocol() == QAbstractSocket::IPv4Protocol)
{
if (addressIsLocal(sender)) scope = "Local";
}
// Process the records locally
acceptRecords(Record::listFromBytes(datagram), removeThem, scope, sender.toString(), QString::number(senderPort));
// Normal: Respond to only Local requests with only owned Records
if (respond and not mServerMode and (scope=="Local" or scope=="Loopback"))
{
globalSocket->writeDatagram(QByteArray("DSDA")+makeDatagram(ownedRecords, true), sender, senderPort);
}
// Server: Respond to only global requests with owned and found Records
else if (respond and mServerMode and scope=="Global")
{
globalSocket->writeDatagram(QByteArray("DSDA")+makeDatagram(ownedRecords + foundRecords.keys(), false), sender, senderPort);
}
}
}