The QTcpSocket class provides a TCP socket. More...

Inheritance diagram for QTcpSocket:

Public Methods
	QTcpSocket (QObject *parent=nullptr)

virtual	~QTcpSocket ()

Public Methods inherited from QAbstractSocket
	QAbstractSocket (SocketType socketType, QObject *parent)

virtual	~QAbstractSocket ()

void	abort ()

bool	atEnd () const override

bool	bind (const QHostAddress &address, quint16 port=0, BindMode mode=DefaultForPlatform)

bool	bind (quint16 port=0, BindMode mode=DefaultForPlatform)

qint64	bytesAvailable () const override

qint64	bytesToWrite () const override

bool	canReadLine () const override

void	close () override

virtual void	connectToHost (const QHostAddress &address, quint16 port, OpenMode openMode=ReadWrite)

virtual void	connectToHost (const QString &hostName, quint16 port, OpenMode openMode=ReadWrite, NetworkLayerProtocol protocol=AnyIPProtocol)

virtual void	disconnectFromHost ()

SocketError	error () const

bool	flush ()

bool	isSequential () const override

bool	isValid () const

QHostAddress	localAddress () const

quint16	localPort () const

PauseModes	pauseMode () const

QHostAddress	peerAddress () const

QString	peerName () const

quint16	peerPort () const

QNetworkProxy	proxy () const

qint64	readBufferSize () const

virtual void	resume ()

void	setPauseMode (PauseModes pauseMode)

void	setProxy (const QNetworkProxy &networkProxy)

virtual void	setReadBufferSize (qint64 size)

virtual bool	setSocketDescriptor (qintptr socketDescriptor, SocketState socketState=ConnectedState, OpenMode openMode=ReadWrite)

virtual void	setSocketOption (QAbstractSocket::SocketOption option, const QVariant &value)

virtual qintptr	socketDescriptor () const

virtual QVariant	socketOption (QAbstractSocket::SocketOption option)

SocketType	socketType () const

SocketState	state () const

bool	waitForBytesWritten (int msecs=30000) override

virtual bool	waitForConnected (int msecs=30000)

virtual bool	waitForDisconnected (int msecs=30000)

bool	waitForReadyRead (int msecs=30000) override

Public Methods inherited from QIODevice
	QIODevice ()

	QIODevice (QObject *parent)

virtual	~QIODevice ()

QString	errorString () const

bool	getChar (char *c)

bool	isOpen () const

bool	isReadable () const

bool	isTextModeEnabled () const

bool	isWritable () const

virtual bool	open (OpenMode mode)

OpenMode	openMode () const

qint64	peek (char *data, qint64 maxSize)

QByteArray	peek (qint64 maxSize)

virtual qint64	pos () const

bool	putChar (char c)

qint64	read (char *data, qint64 maxSize)

QByteArray	read (qint64 maxSize)

QByteArray	readAll ()

qint64	readLine (char *data, qint64 maxSize)

QByteArray	readLine (qint64 maxSize=0)

virtual bool	reset ()

virtual bool	seek (qint64 pos)

void	setTextModeEnabled (bool enabled)

virtual qint64	size () const

void	ungetChar (char c)

qint64	write (const char *data)

qint64	write (const char *data, qint64 maxSize)

qint64	write (const QByteArray &data)

Public Methods inherited from QObject
	QObject (QObject *parent=nullptr)

	~QObject ()

bool	blockSignals (bool block)

const QList< QObject * > &	children () const

bool	connect (const QObject *sender, const QString &signalMethod, const QString &location, const QString &slotMethod, Qt::ConnectionType type=Qt::AutoConnection)

bool	connect (const QObject *sender, const QString &signalMethod, const QString &slotMethod, Qt::ConnectionType type=Qt::AutoConnection)

bool	disconnect (const QObject *receiver, const QString &slotMethod=QString ()) const

bool	disconnect (const QString &signalMethod, const QString &location, const QObject *receiver=nullptr, const QString &slotMethod=QString ()) const

bool	disconnect (const QString &signalMethod=QString (), const QObject *receiver=nullptr, const QString &slotMethod=QString ()) const

void	dumpObjectInfo ()

void	dumpObjectTree ()

QList< QString >	dynamicPropertyNames () const

virtual bool	event (QEvent *event)

virtual bool	eventFilter (QObject watched, QEvent event)

template<typename T >
T	findChild (const QString &childName=QString ()) const

template<class T >
QList< T >	findChildren (const QRegularExpression &regExp, Qt::FindChildOptions options=Qt::FindChildrenRecursively) const

template<class T >
QList< T >	findChildren (const QString &childName=QString (), Qt::FindChildOptions options=Qt::FindChildrenRecursively) const

bool	inherits (const QString &className) const

void	installEventFilter (QObject *filterObj)

bool	isWidgetType () const

bool	isWindowType () const

void	killTimer (int id)

const QMetaObject *	metaObject () const

void	moveToThread (QThread *targetThread)

QString	objectName () const

QObject *	parent () const

template<class T = QVariant>
T	property (const QString &name) const

void	removeEventFilter (QObject *obj)

void	setObjectName (const QString &name)

void	setParent (QObject *parent)

bool	setProperty (const QString &name, const QVariant &value)

bool	signalsBlocked () const

int	startTimer (int interval, Qt::TimerType timerType=Qt::CoarseTimer)

QThread *	thread () const

Additional Inherited Members
Public Typedefs inherited from QAbstractSocket
using	BindMode = QFlags< BindFlag >

using	PauseModes = QFlags< PauseMode >

Public Typedefs inherited from QIODevice
using	OpenMode = QFlags< OpenModeFlag >

Public Types inherited from QAbstractSocket
enum	BindFlag

enum	NetworkLayerProtocol

enum	PauseMode

enum	SocketError

enum	SocketOption

enum	SocketState

enum	SocketType

Public Types inherited from QIODevice
enum	OpenModeFlag

Public Signals inherited from QAbstractSocket
void	connected ()

void	disconnected ()

void	error (QAbstractSocket::SocketError socketError)

void	hostFound ()

void	proxyAuthenticationRequired (const QNetworkProxy &proxy, QAuthenticator *authenticator)

void	stateChanged (QAbstractSocket::SocketState socketState)

Public Signals inherited from QIODevice
void	aboutToClose ()

void	bytesWritten (qint64 bytes)

void	readChannelFinished ()

void	readyRead ()

Public Signals inherited from QObject
void	destroyed (QObject *obj=nullptr)

void	objectNameChanged (const QString &objectName)

Public Slots inherited from QObject
void	deleteLater ()

Static Public Methods inherited from QObject
static bool	connect (const QObject sender, const QMetaMethod &signalMethod, const QObject receiver, const QMetaMethod &slotMethod, Qt::ConnectionType type=Qt::AutoConnection)

static bool	connect (const QObject sender, const QString &signalMethod, const QObject receiver, const QString &slotMethod, Qt::ConnectionType type=Qt::AutoConnection, const QString &location=QString ())

static bool	connect (const QObject sender, const QString &signalMethod, const QString &location, const QObject receiver, const QString &slotMethod, Qt::ConnectionType type=Qt::AutoConnection)

template<class Sender , class SignalClass , class... SignalArgs, class Receiver , class SlotClass , class... SlotArgs, class SlotReturn >
static bool	connect (const Sender sender, void (SignalClass::signalMethod)(SignalArgs...), const Receiver receiver, SlotReturn (SlotClass::slotMethod)(SlotArgs...), Qt::ConnectionType type=Qt::AutoConnection)

template<class Sender , class SignalClass , class... SignalArgs, class Receiver , class T >
static bool	connect (const Sender sender, void (SignalClass::signalMethod)(SignalArgs...), const Receiver *receiver, T slotLambda, Qt::ConnectionType type=Qt::AutoConnection)

static bool	disconnect (const QObject sender, const QMetaMethod &signalMethod, const QObject receiver, const QMetaMethod &slotMethod)

static bool	disconnect (const QObject sender, const QString &signalMethod, const QObject receiver, const QString &slotMethod)

static bool	disconnect (const QObject sender, const QString &signalMethod, const QString &location, const QObject receiver, const QString &slotMethod)

static bool	disconnect (const QObject sender, std::nullptr_t, const QObject receiver, std::nullptr_t)

template<class Sender , class SignalClass , class... SignalArgs, class Receiver , class SlotClass , class... SlotArgs, class SlotReturn >
static bool	disconnect (const Sender sender, void (SignalClass::signalMethod)(SignalArgs...), const Receiver receiver, SlotReturn (SlotClass::slotMethod)(SlotArgs...))

template<class Sender , class SignalClass , class... SignalArgs, class Receiver >
static bool	disconnect (const Sender sender, void (SignalClass::signalMethod)(SignalArgs...), const Receiver *receiver, std::nullptr_t slotMethod=nullptr)

template<class Sender , class SignalClass , class... SignalArgs, class Receiver , class T >
static bool	disconnect (const Sender sender, void (SignalClass::signalMethod)(SignalArgs...), const Receiver *receiver, T slotMethod)

static QMetaObject &	staticMetaObject ()

static QString	tr (const char text, const char comment=nullptr, std::optional< int > numArg=std::optional< int >())

Protected Methods inherited from QAbstractSocket
qint64	readData (char *data, qint64 maxlen) override

qint64	readLineData (char *data, qint64 maxlen) override

void	setLocalAddress (const QHostAddress &address)

void	setLocalPort (quint16 port)

void	setPeerAddress (const QHostAddress &address)

void	setPeerName (const QString &name)

void	setPeerPort (quint16 port)

void	setSocketError (SocketError socketError)

void	setSocketState (SocketState state)

qint64	writeData (const char *data, qint64 len) override

Protected Methods inherited from QIODevice
void	setErrorString (const QString &errorString)

void	setOpenMode (OpenMode openMode)

Protected Methods inherited from QObject
virtual void	childEvent (QChildEvent *event)

virtual void	connectNotify (const QMetaMethod &signalMethod) const

virtual void	customEvent (QEvent *event)

virtual void	disconnectNotify (const QMetaMethod &signalMethod) const

bool	isSignalConnected (const QMetaMethod &signalMethod) const

int	receivers (const QString &signal) const

QObject *	sender () const

int	senderSignalIndex () const

virtual void	timerEvent (QTimerEvent *event)

Properties inherited from QObject
	objectName

Related Functions inherited from QObject
T	qobject_cast (QObject *object)

	QObjectList

Detailed Description

The QTcpSocket class provides a TCP socket.

TCP (Transmission Control Protocol) is a reliable, stream-oriented, connection-oriented transport protocol. It is especially well suited for continuous transmission of data.

QTcpSocket is a convenience subclass of QAbstractSocket that allows you to establish a TCP connection and transfer streams of data. See the QAbstractSocket documentation for details.

Note: TCP sockets can not be opened in QIODevice::Unbuffered mode.

See also: QTcpServer, QUdpSocket, QFtp, QNetworkAccessManager

Constructor & Destructor Documentation

QTcpSocket::QTcpSocket ( QObject * parent = nullptr )

explicit

Creates a QTcpSocket object in state UnconnectedState.

parent is passed on to the QObject constructor.

See also: socketType()

QTcpSocket::~QTcpSocket ( )

virtual

Destroys the socket, closing the connection if necessary.

See also: close()

Public Methods

Additional Inherited Members

Detailed Description

Constructor & Destructor Documentation