The QAbstractSocket class provides the base functionality common to all socket types. More...

Inheritance diagram for QtNetwork.QAbstractSocket:

[legend]

Collaboration diagram for QtNetwork.QAbstractSocket:

Public Types
enum	NetworkLayerProtocol { IPv4Protocol = 0, IPv6Protocol = 1, UnknownNetworkLayerProtocol = -1 }
	More...

enum	SocketError { AddressInUseError = 8, ConnectionRefusedError = 0, DatagramTooLargeError = 6, HostNotFoundError = 2, NetworkError = 7, ProxyAuthenticationRequiredError = 12, ProxyConnectionClosedError = 15, ProxyConnectionRefusedError = 14, ProxyConnectionTimeoutError = 16, ProxyNotFoundError = 17, ProxyProtocolError = 18, RemoteHostClosedError = 1, SocketAccessError = 3, SocketAddressNotAvailableError = 9, SocketResourceError = 4, SocketTimeoutError = 5, SslHandshakeFailedError = 13, UnfinishedSocketOperationError = 11, UnknownSocketError = -1, UnsupportedSocketOperationError = 10 }
	More...

enum	SocketOption { KeepAliveOption = 1, LowDelayOption = 0, MulticastLoopbackOption = 3, MulticastTtlOption = 2 }
	More...

enum	SocketState { BoundState = 4, ClosingState = 6, ConnectedState = 3, ConnectingState = 2, HostLookupState = 1, ListeningState = 5, UnconnectedState = 0 }
	More...

enum	SocketType { TcpSocket = 0, UdpSocket = 1, UnknownSocketType = -1 }
	More...

Public Types inherited from QtCore.QIODevice
enum	OpenModeFlag { Append = 4, NotOpen = 0, ReadOnly = 1, ReadWrite = 3, Text = 16, Truncate = 8, Unbuffered = 32, WriteOnly = 2 }
	More...

Public Member Functions
	QAbstractSocket (QAbstractSocket.SocketType socketType, QObject parent)


override void	CreateProxy ()

new void	Abort ()


override bool	AtEnd ()


override long	BytesAvailable ()


override long	BytesToWrite ()


override bool	CanReadLine ()


override void	Close ()


new void	ConnectToHost (QHostAddress address, ushort port, QIODevice.OpenModeFlag mode=QIODevice.OpenModeFlag.ReadWrite)


new void	ConnectToHost (string hostName, ushort port, QIODevice.OpenModeFlag mode=QIODevice.OpenModeFlag.ReadWrite)


new void	DisconnectFromHost ()


new QAbstractSocket.SocketError	OnError ()


new bool	Flush ()


override bool	IsSequential ()


new bool	IsValid ()


new QHostAddress	LocalAddress ()


new ushort	LocalPort ()


new QHostAddress	PeerAddress ()


new string	PeerName ()


new ushort	PeerPort ()


new bool	SetSocketDescriptor (int socketDescriptor, QAbstractSocket.SocketState state=QAbstractSocket.SocketState.ConnectedState, QIODevice.OpenModeFlag openMode=QIODevice.OpenModeFlag.ReadWrite)


new void	SetSocketOption (QAbstractSocket.SocketOption option, object value)


new int	SocketDescriptor ()


new object	socketOption (QAbstractSocket.SocketOption option)


new QAbstractSocket.SocketType	socketType ()


new QAbstractSocket.SocketState	State ()


override bool	WaitForBytesWritten (int msecs=30000)


new bool	WaitForConnected (int msecs=30000)


new bool	WaitForDisconnected (int msecs=30000)


override bool	WaitForReadyRead (int msecs=30000)


new void	Dispose ()

Public Member Functions inherited from QtCore.QIODevice
	QIODevice ()


	QIODevice (QObject parent)


new string	ErrorString ()


new bool	GetChar (Pointer< sbyte > c)


new bool	IsOpen ()


new bool	IsReadable ()


new bool	IsTextModeEnabled ()


new bool	IsWritable ()


virtual bool	Open (QIODevice.OpenModeFlag mode)


new QIODevice.OpenModeFlag	OpenMode ()


new QByteArray	Peek (long maxlen)


new long	Peek (Pointer< sbyte > data, long maxlen)


virtual long	Pos ()


new bool	PutChar (sbyte c)


new QByteArray	Read (long maxlen)


new long	Read (Pointer< sbyte > data, long maxlen)


new QByteArray	ReadAll ()


new QByteArray	ReadLine (long maxlen=0)


new long	ReadLine (Pointer< sbyte > data, long maxlen)


virtual bool	Reset ()


virtual bool	Seek (long pos)


new void	SetTextModeEnabled (bool enabled)


virtual long	Size ()


new void	UngetChar (sbyte c)


new long	Write (QByteArray data)


new long	Write (string data)


new long	Write (string data, long len)


new void	Dispose ()

Public Member Functions inherited from QtCore.QObject
	QObject (QObject parent=null)


new bool	BlockSignals (bool b)


new System.Collections.Generic.List < QObject >	Children ()


new bool	Connect (QObject sender, string signal, string member, Qt.ConnectionType type=Qt.ConnectionType.AutoConnection)


new void	DeleteLater ()


new bool	Disconnect (QObject receiver, string member=null)


new bool	Disconnect (string signal=null, QObject receiver=null, string member=null)


new void	DumpObjectInfo ()


new void	DumpObjectTree ()


new System.Collections.Generic.List < QByteArray >	DynamicPropertyNames ()


virtual bool	OnEvent (QEvent arg1)


virtual bool	EventFilter (QObject arg1, QEvent arg2)


new bool	Inherits (string classname)


new void	InstallEventFilter (QObject arg1)


new bool	IsWidgetType ()


new void	KillTimer (int id)


new object	Property (string name)


new void	RemoveEventFilter (QObject arg1)


new bool	SetProperty (string name, object value)


new void	SetUserData (uint id, QObjectUserData data)

new bool	SignalsBlocked ()


new int	StartTimer (int interval)


new QObjectUserData	UserData (uint id)

new void	Dispose ()

Public Member Functions inherited from QtCore.Qt
delegate QTextStream	FuncQTextStreamQTextStream (QTextStream qTextStream)

delegate string	FuncStringQByteArray (QByteArray qByteArray)

delegate QByteArray	FuncQByteArrayString (string @string)

delegate void	ActionQtMsgTypeString (QtMsgType qtMsgType, string @string)

delegate QObject	FuncQObject ()

Static Public Member Functions
static string	Tr (string s, string c=null)

static string	Tr (string s, string c, int n)

static string	TrUtf8 (string s, string c=null)

static string	TrUtf8 (string s, string c, int n)

Static Public Member Functions inherited from QtCore.QIODevice
static string	Tr (string s, string c=null)

static string	Tr (string s, string c, int n)

static string	TrUtf8 (string s, string c=null)

static string	TrUtf8 (string s, string c, int n)

Static Public Member Functions inherited from QtCore.QObject
static bool	Connect (QObject sender, QMetaMethod signal, QObject receiver, QMetaMethod method, Qt.ConnectionType type=Qt.ConnectionType.AutoConnection)


static bool	Connect (QObject sender, string signal, QObject receiver, string member, Qt.ConnectionType arg5=Qt.ConnectionType.AutoConnection)


static bool	Disconnect (QObject sender, QMetaMethod signal, QObject receiver, QMetaMethod member)


static bool	Disconnect (QObject sender, string signal, QObject receiver, string member)


static uint	RegisterUserData ()

static string	Tr (string s, string c=null)


static string	Tr (string s, string c, int n)


static string	TrUtf8 (string s, string c=null)


static string	TrUtf8 (string s, string c, int n)


Static Public Member Functions inherited from QtCore.Qt
static QDataStream	Write (QDataStream s, object p)

static QDataStream	Write (QDataStream arg1, QSizeF arg2)

static QTextStream	Write (QTextStream s, Qt.FuncQTextStreamQTextStream f)

static QDataStream	Write (QDataStream arg1, QPoint arg2)

static QDataStream	Write (QDataStream arg1, QLineF arg2)

static QDataStream	Write (QDataStream arg1, QPointF arg2)

static QDataStream	Write (QDataStream arg1, QChar arg2)

static QDataStream	Write (QDataStream arg1, QByteArray arg2)

static QDataStream	Write (QDataStream arg1, QEasingCurve arg2)

static QDataStream	Write (QDataStream arg1, QRectF arg2)

static QDataStream	Write (QDataStream arg1, QDateTime arg2)

static QDataStream	Write (QDataStream arg1, QUrl arg2)

static QDataStream	Write (QDataStream arg1, QTime arg2)

static QDataStream	Write (QDataStream arg1, QLocale arg2)

static QDataStream	Write (QDataStream arg1, QBitArray arg2)

static QDataStream	Write (QDataStream arg1, QUuid arg2)

static QDataStream	Write (QDataStream arg1, QLine arg2)

static QDataStream	Write (QDataStream arg1, QDate arg2)

static QDataStream	Write (QDataStream @out, QRegExp regExp)

static QDataStream	Write (QDataStream arg1, QRect arg2)

static QDataStream	Write (QDataStream arg1, QSize arg2)

static QDataStream	Write (QDataStream s, QVariant.Type p)

static QDataStream	Write (QDataStream arg1, string arg2)

static QDataStream	Write (QDataStream @out, System.Collections.Generic.List< string > list)

static QDataStream	Read (QDataStream arg1, QChar arg2)

static QDataStream	Read (QDataStream arg1, QLocale arg2)

static QDataStream	Read (QDataStream arg1, QRect arg2)

static QDataStream	Read (QDataStream arg1, QEasingCurve arg2)

static QDataStream	Read (QDataStream arg1, QDate arg2)

static QDataStream	Read (QDataStream arg1, QUrl arg2)

static QDataStream	Read (QDataStream arg1, QUuid arg2)

static QTextStream	Read (QTextStream s, Qt.FuncQTextStreamQTextStream f)

static QDataStream	Read (QDataStream arg1, QLineF arg2)

static QDataStream	Read (QDataStream arg1, QRectF arg2)

static QDataStream	Read (QDataStream arg1, QPointF arg2)

static QDataStream	Read (QDataStream arg1, QLine arg2)

static QDataStream	Read (QDataStream arg1, QBitArray arg2)

static QDataStream	Read (QDataStream arg1, QSize arg2)

static QDataStream	Read (QDataStream arg1, QDateTime arg2)

static QDataStream	Read (QDataStream arg1, QTime arg2)

static QDataStream	Read (QDataStream arg1, QPoint arg2)

static QDataStream	Read (QDataStream @in, QRegExp regExp)

static QDataStream	Read (QDataStream s, object p)

static QDataStream	Read (QDataStream arg1, QByteArray arg2)

static QDataStream	Read (QDataStream arg1, QSizeF arg2)

static QDataStream	Read (QDataStream arg1, string arg2)

static QDataStream	Read (QDataStream s, QVariant.Type p)

static QDataStream	Read (QDataStream @in, System.Collections.Generic.List< string > list)

static double	qAcos (double v)

static void	qAddPostRoutine (System.Action arg1)

static string	qAppName ()

static double	qAsin (double v)

static double	qAtan (double v)

static double	qAtan2 (double x, double y)

static void	qBadAlloc ()

static int	qCeil (double v)

static ushort	qChecksum (string s, uint len)

static QByteArray	qCompress (QByteArray data)

static QByteArray	qCompress (QByteArray data, int compressionLevel=-1)

static QByteArray	qCompress (Pointer< byte > data, int nbytes)

static QByteArray	qCompress (Pointer< byte > data, int nbytes, int compressionLevel=-1)

static double	qCos (double v)

static double	qExp (double v)

static double	qFabs (double v)

static double	qFastCos (double x)

static double	qFastSin (double x)

static string	qFlagLocation (string method)

static int	qFloor (double v)

static bool	qFuzzyCompare (double p1, double p2)

static bool	qFuzzyCompare (float p1, float p2)

static bool	qFuzzyIsNull (double d)

static bool	qFuzzyIsNull (float f)

static uint	qHash (QBitArray key)

static uint	qHash (QChar key)

static uint	qHash (QStringRef key)

static uint	qHash (QUrl url)

static uint	qHash (QPersistentModelIndex index)

static uint	qHash (QByteArray key)

static uint	qHash (QModelIndex index)

static uint	qHash (uint key)

static uint	qHash (sbyte key)

static uint	qHash (byte key)

static uint	qHash (short key)

static uint	qHash (NativeLong key)

static uint	qHash (ushort key)

static uint	qHash (long key)

static uint	qHash (ulong key)

static uint	qHash (int key)

static uint	qHash (string key)

static uint	qHash (NativeULong key)

static double	qInf ()

static Qt.ActionQtMsgTypeString	qInstallMsgHandler (Qt.ActionQtMsgTypeString arg1)

static int	qIntCast (float f)

static int	qIntCast (double f)

static bool	qIsFinite (double d)

static bool	qIsFinite (float f)

static bool	qIsInf (float f)

static bool	qIsInf (double d)

static bool	qIsNaN (float f)

static bool	qIsNaN (double d)

static bool	qIsNull (float f)

static bool	qIsNull (double d)

static double	qLn (double v)

static double	qPow (double x, double y)

static double	qQNaN ()

static void	qRegisterStaticPluginInstanceFunction (Qt.FuncQObject function)

static void	qRemovePostRoutine (System.Action arg1)

static int	qRound (double d)

static long	qRound64 (double d)

static double	qSNaN ()

static bool	qSharedBuild ()

static double	qSin (double v)

static double	qSqrt (double v)

static bool	qStringComparisonHelper (QStringRef s1, string s2)

static double	qTan (double v)

static QByteArray	qUncompress (QByteArray data)

static QByteArray	qUncompress (Pointer< byte > data, int nbytes)

static string	qVersion ()

static void	Qbswap_helper (Pointer< byte > src, Pointer< byte > dest, int size)

static QByteArray	Qgetenv (string varName)

static bool	Qputenv (string varName, QByteArray value)

static int	Qrand ()

static void	Qsrand (uint seed)

static int	Qstrcmp (QByteArray str1, QByteArray str2)

static int	Qstrcmp (QByteArray str1, string str2)

static int	Qstrcmp (string str1, QByteArray str2)

static int	Qstrcmp (string str1, string str2)

static Pointer< sbyte >	Qstrcpy (Pointer< sbyte > dst, string src)

static Pointer< sbyte >	Qstrdup (string arg1)

static int	Qstricmp (string arg1, string arg2)

static uint	Qstrlen (string str)

static int	Qstrncmp (string str1, string str2, uint len)

static Pointer< sbyte >	Qstrncpy (Pointer< sbyte > dst, string src, uint len)

static int	Qstrnicmp (string arg1, string arg2, uint len)

static uint	Qstrnlen (string str, uint maxlen)

static string	QtTrId (string id, int n=-1)

Protected Member Functions
	QAbstractSocket (System.Type dummy)

new void	ConnectToHostImplementation (string hostName, ushort port, QIODevice.OpenModeFlag mode=QIODevice.OpenModeFlag.ReadWrite)


new void	OnConnected ()


new void	DisconnectFromHostImplementation ()


new void	OnDisconnected ()


new void	OnError (QAbstractSocket.SocketError arg1)


new void	OnHostFound ()


new void	OnProxyAuthenticationRequired (QNetworkProxy proxy, QAuthenticator authenticator)


override long	ReadData (Pointer< sbyte > data, long maxlen)


override long	ReadLineData (Pointer< sbyte > data, long maxlen)


new void	SetLocalAddress (QHostAddress address)


new void	SetLocalPort (ushort port)


new void	SetPeerAddress (QHostAddress address)


new void	SetPeerName (string name)


new void	SetPeerPort (ushort port)


new void	SetSocketError (QAbstractSocket.SocketError socketError)


new void	SetSocketState (QAbstractSocket.SocketState state)


new void	OnStateChanged (QAbstractSocket.SocketState arg1)


override long	WriteData (string data, long len)


Protected Member Functions inherited from QtCore.QIODevice
	QIODevice (System.Type dummy)

new void	OnAboutToClose ()


new void	OnBytesWritten (long bytes)


new void	OnReadChannelFinished ()


new void	OnReadyRead ()


new void	SetErrorString (string errorString)


new void	SetOpenMode (QIODevice.OpenModeFlag openMode)


Protected Member Functions inherited from QtCore.QObject
	QObject (System.Type dummy)

virtual void	OnChildEvent (QChildEvent arg1)


virtual void	ConnectNotify (string signal)


virtual void	OnCustomEvent (QEvent arg1)


new void	OnDestroyed (QObject arg1=null)


virtual void	DisconnectNotify (string signal)


new int	Receivers (string signal)


new QObject	Sender ()


new int	SenderSignalIndex ()


virtual void	OnTimerEvent (QTimerEvent arg1)

Properties
Slot	HostFound


Slot	Connected


Slot	Disconnected


Slot< QAbstractSocket.SocketState >	StateChanged


Slot< QAbstractSocket.SocketError >	Error


Slot< QNetworkProxy, QAuthenticator >	ProxyAuthenticationRequired


Slot	ConnectionClosed

Slot	DelayedCloseFinished

new QNetworkProxy	Proxy `[get, set]`


new long	ReadBufferSize `[get, set]`


static new QMetaObject	StaticMetaObject `[get]`

new IQAbstractSocketSignals	Emit `[get]`

Properties inherited from QtCore.QIODevice
Slot	ReadyRead


Slot< System.Int64 >	BytesWritten


Slot	AboutToClose


Slot	ReadChannelFinished


static new QMetaObject	StaticMetaObject `[get]`

new IQIODeviceSignals	Emit `[get]`

Properties inherited from QtCore.QObject
virtual EventHandler < QEventArgs< QChildEvent > >	ChildEvent


virtual EventHandler < QEventArgs< QEvent > >	CustomEvent


virtual EventHandler < QEventArgs< QEvent > >	Event


virtual EventHandler < QEventArgs< QTimerEvent > >	TimerEvent


Slot< QObject >	DestroyedQObject

Slot	Destroyed


new QObject	Parent `[get, set]`


virtual System.IntPtr	SmokeObject `[get, set]`

new string	ObjectName `[get, set]`


static new QMetaObject	StaticMetaObject `[get]`


static new QMetaObject	StaticQtMetaObject `[get]`

new IQObjectSignals	Emit `[get]`

Additional Inherited Members
Protected Attributes inherited from QtCore.QObject
object	Q_EMIT = null

SmokeInvocation	interceptor

readonly List< QEventHandler >	eventFilters = new List<QEventHandler>()

Detailed Description

The QAbstractSocket class provides the base functionality common to all socket types.

QAbstractSocket is the base class for QTcpSocket and QUdpSocket and contains all common functionality of these two classes. If you need a socket, you have two options:

Instantiate QTcpSocket or QUdpSocket.

Create a native socket descriptor, instantiate QAbstractSocket, and call setSocketDescriptor() to wrap the native socket.

TCP (Transmission Control Protocol) is a reliable, stream-oriented, connection-oriented transport protocol. UDP (User Datagram Protocol) is an unreliable, datagram-oriented, connectionless protocol. In practice, this means that TCP is better suited for continuous transmission of data, whereas the more lightweight UDP can be used when reliability isn't important.

QAbstractSocket's API unifies most of the differences between the two protocols. For example, although UDP is connectionless, connectToHost() establishes a virtual connection for UDP sockets, enabling you to use QAbstractSocket in more or less the same way regardless of the underlying protocol. Internally, QAbstractSocket remembers the address and port passed to connectToHost(), and functions like read() and write() use these values.

At any time, QAbstractSocket has a state (returned by state()). The initial state is UnconnectedState. After calling connectToHost(), the socket first enters HostLookupState. If the host is found, QAbstractSocket enters ConnectingState and emits the hostFound() signal. When the connection has been established, it enters ConnectedState and emits connected(). If an error occurs at any stage, error() is emitted. Whenever the state changes, stateChanged() is emitted. For convenience, isValid() returns true if the socket is ready for reading and writing, but note that the socket's state must be ConnectedState before reading and writing can occur.

Read or write data by calling read() or write(), or use the convenience functions readLine() and readAll(). QAbstractSocket also inherits getChar(), putChar(), and ungetChar() from QIODevice, which work on single bytes. The bytesWritten() signal is emitted when data has been written to the socket (i.e., when the client has read the data). Note that Qt does not limit the write buffer size. You can monitor its size by listening to this signal.

The readyRead() signal is emitted every time a new chunk of data has arrived. bytesAvailable() then returns the number of bytes that are available for reading. Typically, you would connect the readyRead() signal to a slot and read all available data there. If you don't read all the data at once, the remaining data will still be available later, and any new incoming data will be appended to QAbstractSocket's internal read buffer. To limit the size of the read buffer, call setReadBufferSize().

To close the socket, call disconnectFromHost(). QAbstractSocket enters QAbstractSocket::ClosingState. After all pending data has been written to the socket, QAbstractSocket actually closes the socket, enters QAbstractSocket::ClosedState, and emits disconnected(). If you want to abort a connection immediately, discarding all pending data, call abort() instead. If the remote host closes the connection, QAbstractSocket will emit error(QAbstractSocket::RemoteHostClosedError), during which the socket state will still be ConnectedState, and then the disconnected() signal will be emitted.

The port and address of the connected peer is fetched by calling peerPort() and peerAddress(). peerName() returns the host name of the peer, as passed to connectToHost(). localPort() and localAddress() return the port and address of the local socket.

QAbstractSocket provides a set of functions that suspend the calling thread until certain signals are emitted. These functions can be used to implement blocking sockets:

waitForConnected() blocks until a connection has been established.

waitForReadyRead() blocks until new data is available for reading.

waitForBytesWritten() blocks until one payload of data has been written to the socket.

waitForDisconnected() blocks until the connection has closed.

We show an example:

int numRead = 0, numReadTotal = 0;

char buffer[50];

forever {

numRead = socket.read(buffer, 50);

// do whatever with array

numReadTotal += numRead;

if (numRead == 0 && !socket.waitForReadyRead())

break;

}

If waitForReadyRead() returns false, the connection has been closed or an error has occurred.

Programming with a blocking socket is radically different from programming with a non-blocking socket. A blocking socket doesn't require an event loop and typically leads to simpler code. However, in a GUI application, blocking sockets should only be used in non-GUI threads, to avoid freezing the user interface. See the network/fortuneclient and network/blockingfortuneclient examples for an overview of both approaches.

Note: We discourage the use of the blocking functions together with signals. One of the two possibilities should be used.

QAbstractSocket can be used with QTextStream and QDataStream's stream operators (operator<<() and operator>>()). There is one issue to be aware of, though: You must make sure that enough data is available before attempting to read it using operator>>().

See also QFtp, QNetworkAccessManager, and QTcpServer.

Member Enumeration Documentation

enum QtNetwork.QAbstractSocket.NetworkLayerProtocol

This enum describes the network layer protocol values used in Qt.

Constructor & Destructor Documentation

QtNetwork.QAbstractSocket.QAbstractSocket ( System.Type dummy )

protected

QtNetwork.QAbstractSocket.QAbstractSocket	(	QAbstractSocket.SocketType	socketType,
		QObject	parent
	)

Creates a new abstract socket of type socketType. The parent argument is passed to QObject's constructor.

See also socketType(), QTcpSocket, and QUdpSocket.

Member Function Documentation

new void QtNetwork.QAbstractSocket.Abort ( )

Aborts the current connection and resets the socket. Unlike disconnectFromHost(), this function immediately closes the socket, discarding any pending data in the write buffer.

See also disconnectFromHost() and close().

override bool QtNetwork.QAbstractSocket.AtEnd ( )

virtual

Reimplemented from QIODevice::atEnd().

Returns true if no more data is currently available for reading; otherwise returns false.

This function is most commonly used when reading data from the socket in a loop. For example:

// This slot is connected to QAbstractSocket::readyRead()

void SocketClass::readyReadSlot()

{

while (!socket.atEnd()) {

QByteArray data = socket.read(100);

....

}

See also bytesAvailable() and readyRead().

Reimplemented from QtCore.QIODevice.

Reimplemented in QtNetwork.QSslSocket.

override long QtNetwork.QAbstractSocket.BytesAvailable ( )

virtual

Reimplemented from QIODevice::bytesAvailable().

Returns the number of incoming bytes that are waiting to be read.

Property Documentation

Slot QtNetwork.QAbstractSocket.Connected

addremove

This signal is emitted after connectToHost() has been called and a connection has been successfully established.

Note: On some operating systems the connected() signal may be directly emitted from the connectToHost() call for connections to the localhost.

See also connectToHost() and disconnected().

Slot QtNetwork.QAbstractSocket.ConnectionClosed

addremove

Slot QtNetwork.QAbstractSocket.DelayedCloseFinished

addremove

Slot QtNetwork.QAbstractSocket.Disconnected

addremove

This signal is emitted when the socket has been disconnected.

Warning: If you need to delete the sender() of this signal in a slot connected to it, use the deleteLater() function.

See also connectToHost(), disconnectFromHost(), and abort().

new IQAbstractSocketSignals QtNetwork.QAbstractSocket.Emit

getprotected

Slot<QAbstractSocket.SocketError> QtNetwork.QAbstractSocket.Error

addremove

Returns the type of error that last occurred.

IPv4Protocol	IPv4
IPv6Protocol	IPv6
UnknownNetworkLayerProtocol	Other than IPv4 and IPv6

AddressInUseError	The address specified to QUdpSocket::bind() is already in use and was set to be exclusive.
ConnectionRefusedError	The connection was refused by the peer (or timed out).
DatagramTooLargeError	The datagram was larger than the operating system's limit (which can be as low as 8192 bytes).
HostNotFoundError	The host address was not found.
NetworkError	An error occurred with the network (e.g., the network cable was accidentally plugged out).
ProxyAuthenticationRequiredError	The socket is using a proxy, and the proxy requires authentication.
ProxyConnectionClosedError	The connection to the proxy server was closed unexpectedly (before the connection to the final peer was established) (This value was introduced in 4.5.)
ProxyConnectionRefusedError	Could not contact the proxy server because the connection to that server was denied (This value was introduced in 4.5.)
ProxyConnectionTimeoutError	The connection to the proxy server timed out or the proxy server stopped responding in the authentication phase. (This value was introduced in 4.5.)
ProxyNotFoundError	The proxy address set with setProxy() (or the application proxy) was not found. (This value was introduced in 4.5.)
ProxyProtocolError	The connection negotiation with the proxy server because the response from the proxy server could not be understood. (This value was introduced in 4.5.)
RemoteHostClosedError	The remote host closed the connection. Note that the client socket (i.e., this socket) will be closed after the remote close notification has been sent.
SocketAccessError	The socket operation failed because the application lacked the required privileges.
SocketAddressNotAvailableError	The address specified to QUdpSocket::bind() does not belong to the host.
SocketResourceError	The local system ran out of resources (e.g., too many sockets).
SocketTimeoutError	The socket operation timed out.
SslHandshakeFailedError	The SSL/TLS handshake failed, so the connection was closed (only used in QSslSocket) (This value was introduced in 4.4.)
UnfinishedSocketOperationError	Used by QAbstractSocketEngine only, The last operation attempted has not finished yet (still in progress in the background). (This value was introduced in 4.4.)
UnknownSocketError	An unidentified error occurred.
UnsupportedSocketOperationError	The requested socket operation is not supported by the local operating system (e.g., lack of IPv6 support).

KeepAliveOption	Set this to 1 to enable the SO_KEEPALIVE socket option
LowDelayOption	Try to optimize the socket for low latency. For a QTcpSocket this would set the TCP_NODELAY option and disable Nagle's algorithm. Set this to 1 to enable.
MulticastLoopbackOption	Set this to 1 to enable the IP_MULTICAST_LOOP (multicast loopback) socket option.
MulticastTtlOption	Set this to an integer value to set IP_MULTICAST_TTL (TTL for multicast datagrams) socket option.

BoundState	The socket is bound to an address and port (for servers).
ClosingState	The socket is about to close (data may still be waiting to be written).
ConnectedState	A connection is established.
ConnectingState	The socket has started establishing a connection.
HostLookupState	The socket is performing a host name lookup.
ListeningState	For internal use only.
UnconnectedState	The socket is not connected.

TcpSocket	TCP
UdpSocket	UDP
UnknownSocketType	Other than TCP and UDP

new void QtNetwork.QAbstractSocket.ConnectToHost	(	QHostAddress	address,
		ushort	port,
		QIODevice.OpenModeFlag	mode = `QIODevice.OpenModeFlag.ReadWrite`
	)

new void QtNetwork.QAbstractSocket.ConnectToHost	(	string	hostName,
		ushort	port,
		QIODevice.OpenModeFlag	mode = `QIODevice.OpenModeFlag.ReadWrite`
	)

new bool QtNetwork.QAbstractSocket.SetSocketDescriptor	(	int	socketDescriptor,
		QAbstractSocket.SocketState	state = `QAbstractSocket.SocketState.ConnectedState`,
		QIODevice.OpenModeFlag	openMode = `QIODevice.OpenModeFlag.ReadWrite`
	)

new void QtNetwork.QAbstractSocket.SetSocketOption	(	QAbstractSocket.SocketOption	option,
		object	value
	)

Public Types

Public Member Functions

Static Public Member Functions

Protected Member Functions

Properties

Additional Inherited Members

Detailed Description

Member Enumeration Documentation

Constructor & Destructor Documentation

Member Function Documentation

Property Documentation