mirror of
https://github.com/moonlight-stream/moonlight-qt
synced 2024-12-13 21:02:28 +00:00
684 lines
21 KiB
C++
684 lines
21 KiB
C++
#include "computermanager.h"
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#include "nvhttp.h"
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#include "settings/streamingpreferences.h"
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#include <Limelight.h>
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#include <QtEndian>
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#include <QThread>
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#include <QThreadPool>
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#define SER_HOSTS "hosts"
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class PcMonitorThread : public QThread
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{
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Q_OBJECT
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#define TRIES_BEFORE_OFFLINING 2
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#define POLLS_PER_APPLIST_FETCH 10
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public:
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PcMonitorThread(NvComputer* computer)
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: m_Computer(computer)
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{
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setObjectName("Polling thread for " + computer->name);
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}
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private:
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bool tryPollComputer(QString address, bool& changed)
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{
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NvHTTP http(address, m_Computer->serverCert);
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QString serverInfo;
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try {
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serverInfo = http.getServerInfo(NvHTTP::NvLogLevel::NONE);
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} catch (...) {
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return false;
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}
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NvComputer newState(address, serverInfo, QSslCertificate());
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// Ensure the machine that responded is the one we intended to contact
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if (m_Computer->uuid != newState.uuid) {
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qInfo() << "Found unexpected PC " << newState.name << " looking for " << m_Computer->name;
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return false;
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}
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changed = m_Computer->update(newState);
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return true;
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}
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bool updateAppList(bool& changed)
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{
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Q_ASSERT(m_Computer->activeAddress != nullptr);
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NvHTTP http(m_Computer->activeAddress, m_Computer->serverCert);
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QVector<NvApp> appList;
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try {
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appList = http.getAppList();
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if (appList.isEmpty()) {
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return false;
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}
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} catch (...) {
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return false;
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}
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QWriteLocker lock(&m_Computer->lock);
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if (m_Computer->appList != appList) {
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m_Computer->appList = appList;
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m_Computer->sortAppList();
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changed = true;
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}
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return true;
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}
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void run() override
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{
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// Always fetch the applist the first time
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int pollsSinceLastAppListFetch = POLLS_PER_APPLIST_FETCH;
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while (!isInterruptionRequested()) {
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bool stateChanged = false;
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bool online = false;
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bool wasOnline = m_Computer->state == NvComputer::CS_ONLINE;
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for (int i = 0; i < TRIES_BEFORE_OFFLINING && !online; i++) {
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for (auto& address : m_Computer->uniqueAddresses()) {
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if (isInterruptionRequested()) {
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return;
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}
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if (tryPollComputer(address, stateChanged)) {
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if (!wasOnline) {
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qInfo() << m_Computer->name << "is now online at" << m_Computer->activeAddress;
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}
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online = true;
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break;
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}
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}
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}
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// Check if we failed after all retry attempts
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// Note: we don't need to acquire the read lock here,
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// because we're on the writing thread.
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if (!online && m_Computer->state != NvComputer::CS_OFFLINE) {
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qInfo() << m_Computer->name << "is now offline";
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m_Computer->state = NvComputer::CS_OFFLINE;
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stateChanged = true;
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}
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// Grab the applist if it's empty or it's been long enough that we need to refresh
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pollsSinceLastAppListFetch++;
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if (m_Computer->state == NvComputer::CS_ONLINE &&
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m_Computer->pairState == NvComputer::PS_PAIRED &&
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(m_Computer->appList.isEmpty() || pollsSinceLastAppListFetch >= POLLS_PER_APPLIST_FETCH)) {
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// Notify prior to the app list poll since it may take a while, and we don't
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// want to delay onlining of a machine, especially if we already have a cached list.
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if (stateChanged) {
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emit computerStateChanged(m_Computer);
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stateChanged = false;
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}
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if (updateAppList(stateChanged)) {
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pollsSinceLastAppListFetch = 0;
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}
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}
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if (stateChanged) {
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// Tell anyone listening that we've changed state
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emit computerStateChanged(m_Computer);
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}
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// Wait a bit to poll again
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QThread::sleep(3);
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}
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}
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signals:
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void computerStateChanged(NvComputer* computer);
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private:
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NvComputer* m_Computer;
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};
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ComputerManager::ComputerManager(QObject *parent)
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: QObject(parent),
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m_PollingRef(0),
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m_MdnsBrowser(nullptr)
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{
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QSettings settings;
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// Inflate our hosts from QSettings
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int hosts = settings.beginReadArray(SER_HOSTS);
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for (int i = 0; i < hosts; i++) {
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settings.setArrayIndex(i);
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NvComputer* computer = new NvComputer(settings);
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m_KnownHosts[computer->uuid] = computer;
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}
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settings.endArray();
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}
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ComputerManager::~ComputerManager()
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{
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QWriteLocker lock(&m_Lock);
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// Delete machines that haven't been resolved yet
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while (!m_PendingResolution.isEmpty()) {
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MdnsPendingComputer* computer = m_PendingResolution.first();
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delete computer;
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m_PendingResolution.removeFirst();
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}
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// Delete the browser to stop discovery
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delete m_MdnsBrowser;
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m_MdnsBrowser = nullptr;
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{
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QMutableMapIterator<QString, QThread*> i(m_PollThreads);
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// Interrupt all polling threads
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while (i.hasNext()) {
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i.next();
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i.value()->requestInterruption();
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}
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// Wait for all threads to terminate before destroying
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// the NvComputer objects.
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i.toFront();
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while (i.hasNext()) {
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i.next();
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QThread* thread = i.value();
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thread->wait();
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delete thread;
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i.remove();
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}
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}
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{
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QMutableMapIterator<QString, NvComputer*> i(m_KnownHosts);
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// Destroy all NvComputer objects
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while (i.hasNext()) {
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i.next();
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delete i.value();
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i.remove();
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}
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}
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}
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void ComputerManager::saveHosts()
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{
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QSettings settings;
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QReadLocker lock(&m_Lock);
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settings.remove(SER_HOSTS);
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settings.beginWriteArray(SER_HOSTS);
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for (int i = 0; i < m_KnownHosts.count(); i++) {
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settings.setArrayIndex(i);
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m_KnownHosts[m_KnownHosts.keys()[i]]->serialize(settings);
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}
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settings.endArray();
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}
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void ComputerManager::startPolling()
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{
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QWriteLocker lock(&m_Lock);
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if (++m_PollingRef > 1) {
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return;
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}
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StreamingPreferences prefs;
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if (prefs.enableMdns) {
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// Start an MDNS query for GameStream hosts
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m_MdnsBrowser = new QMdnsEngine::Browser(&m_MdnsServer, "_nvstream._tcp.local.", &m_MdnsCache);
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connect(m_MdnsBrowser, &QMdnsEngine::Browser::serviceAdded,
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this, [this](const QMdnsEngine::Service& service) {
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qInfo() << "Discovered mDNS host:" << service.hostname();
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MdnsPendingComputer* pendingComputer = new MdnsPendingComputer(&m_MdnsServer, &m_MdnsCache, service);
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connect(pendingComputer, SIGNAL(resolvedv4(MdnsPendingComputer*,QHostAddress)),
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this, SLOT(handleMdnsServiceResolved(MdnsPendingComputer*,QHostAddress)));
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m_PendingResolution.append(pendingComputer);
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});
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}
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else {
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qWarning() << "mDNS is disabled by user preference";
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}
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// Start polling threads for each known host
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QMapIterator<QString, NvComputer*> i(m_KnownHosts);
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while (i.hasNext()) {
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i.next();
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startPollingComputer(i.value());
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}
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}
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// Must hold m_Lock for write
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void ComputerManager::startPollingComputer(NvComputer* computer)
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{
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if (m_PollingRef == 0) {
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return;
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}
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if (m_PollThreads.contains(computer->uuid)) {
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Q_ASSERT(m_PollThreads[computer->uuid]->isRunning());
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return;
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}
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PcMonitorThread* thread = new PcMonitorThread(computer);
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connect(thread, SIGNAL(computerStateChanged(NvComputer*)),
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this, SLOT(handleComputerStateChanged(NvComputer*)));
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m_PollThreads[computer->uuid] = thread;
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thread->start();
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}
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void ComputerManager::handleMdnsServiceResolved(MdnsPendingComputer* computer,
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const QHostAddress& address)
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{
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qInfo() << "Resolved" << computer->hostname() << "to" << address.toString();
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addNewHost(address.toString(), true);
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m_PendingResolution.removeOne(computer);
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computer->deleteLater();
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}
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void ComputerManager::handleComputerStateChanged(NvComputer* computer)
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{
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emit computerStateChanged(computer);
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if (computer->pendingQuit && computer->currentGameId == 0) {
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computer->pendingQuit = false;
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emit quitAppCompleted(QVariant());
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}
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// Save updated hosts to QSettings
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saveHosts();
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}
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QVector<NvComputer*> ComputerManager::getComputers()
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{
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QReadLocker lock(&m_Lock);
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return QVector<NvComputer*>::fromList(m_KnownHosts.values());
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}
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class DeferredHostDeletionTask : public QRunnable
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{
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public:
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DeferredHostDeletionTask(ComputerManager* cm, NvComputer* computer)
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: m_Computer(computer),
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m_ComputerManager(cm) {}
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void run()
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{
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QThread* pollingThread;
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// Only do the minimum amount of work while holding the writer lock.
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// We must release it before calling saveHosts().
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{
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QWriteLocker lock(&m_ComputerManager->m_Lock);
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pollingThread = m_ComputerManager->m_PollThreads[m_Computer->uuid];
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m_ComputerManager->m_PollThreads.remove(m_Computer->uuid);
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m_ComputerManager->m_KnownHosts.remove(m_Computer->uuid);
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}
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// Persist the new host list
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m_ComputerManager->saveHosts();
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// Delete the polling thread
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if (pollingThread != nullptr) {
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pollingThread->requestInterruption();
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// We must wait here because we're going to delete computer
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// and we can't do that out from underneath the poller.
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pollingThread->wait();
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// The thread is safe to delete now
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Q_ASSERT(pollingThread->isFinished());
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delete pollingThread;
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}
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// Finally, delete the computer itself. This must be done
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// last because the polling thread might be using it.
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delete m_Computer;
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}
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private:
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NvComputer* m_Computer;
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ComputerManager* m_ComputerManager;
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};
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void ComputerManager::deleteHost(NvComputer* computer)
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{
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// Punt to a worker thread to avoid stalling the
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// UI while waiting for the polling thread to die
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QThreadPool::globalInstance()->start(new DeferredHostDeletionTask(this, computer));
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}
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class PendingPairingTask : public QObject, public QRunnable
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{
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Q_OBJECT
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public:
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PendingPairingTask(ComputerManager* computerManager, NvComputer* computer, QString pin)
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: m_Computer(computer),
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m_Pin(pin)
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{
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connect(this, &PendingPairingTask::pairingCompleted,
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computerManager, &ComputerManager::pairingCompleted);
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}
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signals:
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void pairingCompleted(NvComputer* computer, QString error);
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private:
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void run()
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{
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NvPairingManager pairingManager(m_Computer->activeAddress);
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try {
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NvPairingManager::PairState result = pairingManager.pair(m_Computer->appVersion, m_Pin, m_Computer->serverCert);
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switch (result)
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{
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case NvPairingManager::PairState::PIN_WRONG:
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emit pairingCompleted(m_Computer, "The PIN from the PC didn't match. Please try again.");
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break;
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case NvPairingManager::PairState::FAILED:
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emit pairingCompleted(m_Computer, "Pairing failed. Please try again.");
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break;
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case NvPairingManager::PairState::ALREADY_IN_PROGRESS:
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emit pairingCompleted(m_Computer, "Another pairing attempt is already in progress.");
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break;
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case NvPairingManager::PairState::PAIRED:
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emit pairingCompleted(m_Computer, nullptr);
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break;
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}
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} catch (const GfeHttpResponseException& e) {
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emit pairingCompleted(m_Computer, e.toQString());
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} catch (const QtNetworkReplyException& e) {
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emit pairingCompleted(m_Computer, e.toQString());
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}
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}
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NvComputer* m_Computer;
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QString m_Pin;
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};
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void ComputerManager::pairHost(NvComputer* computer, QString pin)
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{
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// Punt to a worker thread to avoid stalling the
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// UI while waiting for pairing to complete
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PendingPairingTask* pairing = new PendingPairingTask(this, computer, pin);
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QThreadPool::globalInstance()->start(pairing);
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}
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class PendingQuitTask : public QObject, public QRunnable
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{
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Q_OBJECT
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public:
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PendingQuitTask(ComputerManager* computerManager, NvComputer* computer)
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: m_Computer(computer)
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{
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connect(this, &PendingQuitTask::quitAppFailed,
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computerManager, &ComputerManager::quitAppCompleted);
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}
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signals:
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void quitAppFailed(QString error);
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private:
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void run()
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{
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NvHTTP http(m_Computer->activeAddress, m_Computer->serverCert);
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try {
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if (m_Computer->currentGameId != 0) {
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http.quitApp();
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}
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} catch (const GfeHttpResponseException& e) {
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{
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QWriteLocker lock(&m_Computer->lock);
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m_Computer->pendingQuit = false;
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}
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if (e.getStatusCode() == 599) {
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// 599 is a special code we make a custom message for
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emit quitAppFailed("The running game wasn't started by this PC. "
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"You must quit the game on the host PC manually or use the device that originally started the game.");
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}
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else {
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emit quitAppFailed(e.toQString());
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}
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} catch (const QtNetworkReplyException& e) {
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{
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QWriteLocker lock(&m_Computer->lock);
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m_Computer->pendingQuit = false;
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}
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emit quitAppFailed(e.toQString());
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}
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}
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NvComputer* m_Computer;
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};
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void ComputerManager::quitRunningApp(NvComputer* computer)
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{
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QWriteLocker lock(&computer->lock);
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computer->pendingQuit = true;
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PendingQuitTask* quit = new PendingQuitTask(this, computer);
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QThreadPool::globalInstance()->start(quit);
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}
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void ComputerManager::stopPollingAsync()
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{
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QWriteLocker lock(&m_Lock);
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Q_ASSERT(m_PollingRef > 0);
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if (--m_PollingRef > 0) {
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return;
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}
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// Delete machines that haven't been resolved yet
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while (!m_PendingResolution.isEmpty()) {
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MdnsPendingComputer* computer = m_PendingResolution.first();
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computer->deleteLater();
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m_PendingResolution.removeFirst();
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}
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// Delete the browser to stop discovery
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delete m_MdnsBrowser;
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m_MdnsBrowser = nullptr;
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// Interrupt all threads, but don't wait for them to terminate
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QMutableMapIterator<QString, QThread*> i(m_PollThreads);
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while (i.hasNext()) {
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i.next();
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QThread* thread = i.value();
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// Let this thread delete itself when it's finished
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connect(thread, SIGNAL(finished()),
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thread, SLOT(deleteLater()));
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// The threads will delete themselves when they terminate,
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// but we remove them from the polling threads map here.
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i.value()->requestInterruption();
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i.remove();
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}
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}
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class PendingAddTask : public QObject, public QRunnable
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{
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Q_OBJECT
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public:
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PendingAddTask(ComputerManager* computerManager, QString address, bool mdns)
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: m_ComputerManager(computerManager),
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m_Address(address),
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m_Mdns(mdns)
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{
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connect(this, &PendingAddTask::computerAddCompleted,
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computerManager, &ComputerManager::computerAddCompleted);
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connect(this, &PendingAddTask::computerStateChanged,
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computerManager, &ComputerManager::handleComputerStateChanged);
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}
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signals:
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void computerAddCompleted(QVariant success);
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void computerStateChanged(NvComputer* computer);
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private:
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QString fetchServerInfo(NvHTTP& http)
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{
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QString serverInfo;
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try {
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// There's a race condition between GameStream servers reporting presence over
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// mDNS and the HTTPS server being ready to respond to our queries. To work
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// around this issue, we will issue the request again after a few seconds if
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// we see a ServiceUnavailableError error.
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try {
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serverInfo = http.getServerInfo(NvHTTP::NvLogLevel::VERBOSE);
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} catch (const QtNetworkReplyException& e) {
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if (e.getError() == QNetworkReply::ServiceUnavailableError) {
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qWarning() << "Retrying request in 5 seconds after ServiceUnavailableError";
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QThread::sleep(5);
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serverInfo = http.getServerInfo(NvHTTP::NvLogLevel::VERBOSE);
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qInfo() << "Retry successful";
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}
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else {
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// Rethrow other errors
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throw e;
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}
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}
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return serverInfo;
|
|
} catch (...) {
|
|
if (!m_Mdns) {
|
|
emit computerAddCompleted(false);
|
|
}
|
|
return QString();
|
|
}
|
|
}
|
|
|
|
void run()
|
|
{
|
|
NvHTTP http(m_Address, QSslCertificate());
|
|
|
|
qInfo() << "Processing new PC at" << m_Address << "from" << (m_Mdns ? "mDNS" : "user");
|
|
|
|
// Perform initial serverinfo fetch over HTTP since we don't know which cert to use
|
|
QString serverInfo = fetchServerInfo(http);
|
|
if (serverInfo.isEmpty()) {
|
|
return;
|
|
}
|
|
|
|
// Create initial newComputer using HTTP serverinfo with no pinned cert
|
|
NvComputer* newComputer = new NvComputer(m_Address, serverInfo, QSslCertificate());
|
|
|
|
// Check if we have a record of this host UUID to pull the pinned cert
|
|
NvComputer* existingComputer;
|
|
{
|
|
QReadLocker lock(&m_ComputerManager->m_Lock);
|
|
existingComputer = m_ComputerManager->m_KnownHosts[newComputer->uuid];
|
|
if (existingComputer != nullptr) {
|
|
http.setServerCert(existingComputer->serverCert);
|
|
}
|
|
}
|
|
|
|
// Fetch serverinfo again over HTTPS with the pinned cert
|
|
if (existingComputer != nullptr) {
|
|
serverInfo = fetchServerInfo(http);
|
|
if (serverInfo.isEmpty()) {
|
|
return;
|
|
}
|
|
|
|
// Update the polled computer with the HTTPS information
|
|
NvComputer httpsComputer(m_Address, serverInfo, QSslCertificate());
|
|
newComputer->update(httpsComputer);
|
|
}
|
|
|
|
// Update addresses depending on the context
|
|
if (m_Mdns) {
|
|
newComputer->localAddress = m_Address;
|
|
|
|
// Get the WAN IP address using STUN if we're on mDNS
|
|
quint32 addr;
|
|
int err = LiFindExternalAddressIP4("stun.stunprotocol.org", 3478, &addr);
|
|
if (err == 0) {
|
|
newComputer->remoteAddress = QHostAddress(qFromBigEndian(addr)).toString();
|
|
}
|
|
else {
|
|
qWarning() << "STUN failed to get WAN address:" << err;
|
|
}
|
|
}
|
|
else {
|
|
newComputer->manualAddress = m_Address;
|
|
}
|
|
|
|
{
|
|
// Check if this PC already exists
|
|
QWriteLocker lock(&m_ComputerManager->m_Lock);
|
|
NvComputer* existingComputer = m_ComputerManager->m_KnownHosts[newComputer->uuid];
|
|
if (existingComputer != nullptr) {
|
|
// Fold it into the existing PC
|
|
bool changed = existingComputer->update(*newComputer);
|
|
delete newComputer;
|
|
|
|
// Drop the lock before notifying
|
|
lock.unlock();
|
|
|
|
// For non-mDNS clients, let them know it succeeded
|
|
if (!m_Mdns) {
|
|
emit computerAddCompleted(true);
|
|
}
|
|
|
|
// Tell our client if something changed
|
|
if (changed) {
|
|
qInfo() << existingComputer->name << "is now at" << existingComputer->activeAddress;
|
|
emit computerStateChanged(existingComputer);
|
|
}
|
|
}
|
|
else {
|
|
// Store this in our active sets
|
|
m_ComputerManager->m_KnownHosts[newComputer->uuid] = newComputer;
|
|
|
|
// Start polling if enabled (write lock required)
|
|
m_ComputerManager->startPollingComputer(newComputer);
|
|
|
|
// Drop the lock before notifying
|
|
lock.unlock();
|
|
|
|
// For non-mDNS clients, let them know it succeeded
|
|
if (!m_Mdns) {
|
|
emit computerAddCompleted(true);
|
|
}
|
|
|
|
// Tell our client about this new PC
|
|
emit computerStateChanged(newComputer);
|
|
}
|
|
}
|
|
}
|
|
|
|
ComputerManager* m_ComputerManager;
|
|
QString m_Address;
|
|
bool m_Mdns;
|
|
};
|
|
|
|
void ComputerManager::addNewHost(QString address, bool mdns)
|
|
{
|
|
// Punt to a worker thread to avoid stalling the
|
|
// UI while waiting for serverinfo query to complete
|
|
PendingAddTask* addTask = new PendingAddTask(this, address, mdns);
|
|
QThreadPool::globalInstance()->start(addTask);
|
|
}
|
|
|
|
#include "computermanager.moc"
|