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// Copyright (C) 2023 The Qt Company Ltd.
// SPDX-License-Identifier: LicenseRef-Qt-Commercial OR LGPL-3.0-only OR GPL-2.0-only OR GPL-3.0-only
#ifndef QT_CTFSERVER_H
#define QT_CTFSERVER_H
//
// W A R N I N G
// -------------
//
// This file is not part of the Qt API. It exists purely as an
// implementation detail. This header file may change from version to
// version without notice, or even be removed.
//
// We mean it.
//
//
#include <qbytearray.h>
#include <qdatastream.h>
#include <qthread.h>
#include <qmutex.h>
#include <qwaitcondition.h>
#include <qeventloop.h>
#include <QtNetwork/qtcpserver.h>
#include <QtNetwork/qtcpsocket.h>
#include <qcborstreamreader.h>
#include <qcborstreamwriter.h>
#include <qlist.h>
typedef struct ZSTD_CCtx_s ZSTD_CCtx;
QT_BEGIN_NAMESPACE
class QCtfServer;
struct TracePacket
{
static constexpr quint32 PacketMagicNumber = 0x100924da;
static constexpr quint32 PacketSize = 4096 + 9;
QByteArray stream_name;
QByteArray stream_data;
quint32 flags = 0;
TracePacket() = default;
TracePacket(const TracePacket &t)
{
stream_name = t.stream_name;
stream_data = t.stream_data;
flags = t.flags;
}
TracePacket &operator = (const TracePacket &t)
{
stream_name = t.stream_name;
stream_data = t.stream_data;
flags = t.flags;
return *this;
}
TracePacket(TracePacket &&t)
{
stream_name = std::move(t.stream_name);
stream_data = std::move(t.stream_data);
flags = t.flags;
}
TracePacket &operator = (TracePacket &&t)
{
stream_name = std::move(t.stream_name);
stream_data = std::move(t.stream_data);
flags = t.flags;
return *this;
}
};
auto constexpr operator""_MB(quint64 s) -> quint64
{
return s * 1024ul * 1024ul;
}
struct TraceRequest
{
quint32 clientId;
quint32 clientVersion;
quint32 flags;
quint32 bufferSize;
QString sessionName;
QString sessionTracepoints;
static constexpr quint32 MaxBufferSize = 1024_MB;
bool isValid() const
{
if (clientId != 0 && clientVersion != 0 && !sessionName.isEmpty()
&& !sessionTracepoints.isEmpty() && bufferSize < MaxBufferSize)
return true;
return false;
}
};
struct TraceResponse
{
quint32 serverId;
quint32 serverVersion;
QString serverName;
};
class QCtfServer : public QThread
{
Q_OBJECT
public:
enum ServerStatus
{
Uninitialized,
Idle,
Connected,
Error,
};
enum ServerFlags
{
CompressionMask = 255,
DontBufferOnIdle = 256, // not set -> the server is buffering even without client connection
// set -> the server is buffering only when client is connected
};
enum RequestIds
{
RequestClientId = 0,
RequestClientVersion,
RequestSessionName,
RequestSessionTracepoints,
RequestFlags,
RequestBufferSize,
RequestCompressionScheme,
};
struct ServerCallback
{
virtual void handleSessionChange() = 0;
virtual void handleStatusChange(ServerStatus status) = 0;
};
QCtfServer(QObject *parent = nullptr);
~QCtfServer();
void setCallback(ServerCallback *cb);
void setHost(const QString &address);
void setPort(int port);
void run() override;
void startServer();
void stopServer();
void bufferData(const QString &stream, const QByteArray &data, quint32 flags);
QString sessionName() const;
QString sessionTracepoints() const;
bool bufferOnIdle() const;
ServerStatus status() const;
private:
void initWrite();
void bytesWritten(qint64 size);
bool waitSocket();
void readCbor(QCborStreamReader &cbor);
void handleString(QCborStreamReader &cbor);
void handleFixedWidth(QCborStreamReader &cbor);
bool recognizedCompressionScheme() const;
void setStatusAndNotify(ServerStatus status);
void writePacket(TracePacket &packet, QCborStreamWriter &cbor);
QMutex m_mutex;
QWaitCondition m_bufferHasData;
QList<TracePacket> m_packets;
QString m_address;
QTcpServer *m_server = nullptr;
QTcpSocket *m_socket = nullptr;
QEventLoop *m_eventLoop = nullptr;
QList<QString> m_keySet;
TraceRequest m_req;
ServerCallback *m_cb = nullptr;
ServerStatus m_status = Uninitialized;
qint64 m_waitWriteSize = 0;
qint64 m_writtenSize = 0;
int m_port;
int m_compression = 0;
int m_maxPackets = DefaultMaxPackets;
QAtomicInt m_stopping;
bool m_bufferOnIdle = true;
QString m_currentKey;
QString m_requestedCompressionScheme;
#if QT_CONFIG(zstd)
ZSTD_CCtx *m_zstdCCtx = nullptr;
#endif
static constexpr quint32 ServerId = 1;
static constexpr quint32 DefaultMaxPackets = 256; // 1 MB
};
QT_END_NAMESPACE
#endif
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