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QSslServer Class

Implements an encrypted, secure TCP server over TLS. 更多...

头： #include <QSslServer>
CMake: find_package(Qt6 REQUIRED COMPONENTS Network)
target_link_libraries(mytarget PRIVATE Qt6::Network)
qmake: QT += network
Since: Qt 6.4
继承： QTcpServer

公共函数

QSslServer (QObject * parent = nullptr)
virtual ~QSslServer () override
int handshakeTimeout () const
void setHandshakeTimeout (int timeout )
void setSslConfiguration (const QSslConfiguration & sslConfiguration )
QSslConfiguration sslConfiguration () const

信号

void alertReceived (QSslSocket * socket , QSsl::AlertLevel level , QSsl::AlertType type , const QString & description )
void alertSent (QSslSocket * socket , QSsl::AlertLevel level , QSsl::AlertType type , const QString & description )
void errorOccurred (QSslSocket * socket , QAbstractSocket::SocketError socketError )
void handshakeInterruptedOnError (QSslSocket * socket , const QSslError & error )
void peerVerifyError (QSslSocket * socket , const QSslError & error )
void preSharedKeyAuthenticationRequired (QSslSocket * socket , QSslPreSharedKeyAuthenticator * authenticator )
void sslErrors (QSslSocket * socket , const QList<QSslError> & errors )
void startedEncryptionHandshake (QSslSocket * socket )

重实现保护函数

virtual void incomingConnection (qintptr socket ) override

详细描述

Class to use in place of QTcpServer to implement TCP server using Transport Layer Security (TLS).

To configure the secure handshake settings, use the applicable setter functions on a QSslConfiguration object, and then use it as an argument to the setSslConfiguration () function. All following incoming connections handled will use these settings.

To start listening to incoming connections use the listen () function inherited from QTcpServer . Other settings can be configured by using the setter functions inherited from the QTcpServer 类。

Connect to the signals of this class to respond to the incoming connection attempts. They are the same as the signals on QSslSocket , but also passes a pointer to the socket in question.

When responding to the pendingConnectionAvailable () signal, use the nextPendingConnection () function to fetch the next incoming connection and take it out of the pending connection queue. The QSslSocket is a child of the QSslServer and will be deleted when the QSslServer is deleted. It is still a good idea to destroy the object explicitly when you are done with it, to avoid wasting memory.

另请参阅 QTcpServer , QSslConfiguration ，和 QSslSocket .

成员函数文档编制

[explicit] QSslServer:: QSslServer ( QObject * parent = nullptr)

Constructs a new QSslServer with the given parent .

[override virtual] QSslServer:: ~QSslServer ()

销毁 QSslServer .

All open connections are closed.

[signal] void QSslServer:: alertReceived ( QSslSocket * socket , QSsl::AlertLevel level , QSsl::AlertType type , const QString & description )

QSslServer emits this signal if an alert message was received by the socket from a peer. level tells if the alert was fatal or it was a warning. type is the code explaining why the alert was sent. When a textual description of the alert message is available, it is supplied in description .

注意： The signal is mostly for informational and debugging purposes and does not require any handling in the application. If the alert was fatal, underlying backend will handle it and close the connection.

注意： 并非所有后端都支持此功能。

另请参阅 alertSent (), QSsl::AlertLevel ，和 QSsl::AlertType .

[signal] void QSslServer:: alertSent ( QSslSocket * socket , QSsl::AlertLevel level , QSsl::AlertType type , const QString & description )

QSslServer emits this signal if an alert message was sent from socket to a peer. level describes if it was a warning or a fatal error. type gives the code of the alert message. When a textual description of the alert message is available, it is supplied in description .

注意： This signal is mostly informational and can be used for debugging purposes, normally it does not require any actions from the application.

注意： 并非所有后端都支持此功能。

另请参阅 alertReceived (), QSsl::AlertLevel ，和 QSsl::AlertType .

[signal] void QSslServer:: errorOccurred ( QSslSocket * socket , QAbstractSocket::SocketError socketError )

This signal is emitted after an error occurred during handshake. The socketError 参数描述出现错误的类型。

The socket is automatically deleted after this signal is emitted if the socket handshake has not reached encrypted state. But if the socket is successfully encrypted, it is inserted into the QSslServer 's pending connections queue. When the user has called QTcpServer::nextPendingConnection () it is the user's responsibility to destroy the socket 或 socket will not be destroyed until the QSslServer object is destroyed. If an error occurs on a socket after it has been inserted into the pending connections queue, this signal will not be emitted, and the socket will not be removed or destroyed.

注意： 不可以使用 Qt::QueuedConnection when connecting to this signal, or the socket will have been already destroyed when the signal is handled.

另请参阅 QSslSocket::error () 和 errorString ().

[signal] void QSslServer:: handshakeInterruptedOnError ( QSslSocket * socket , const QSslError & error )

QSslServer emits this signal if a certificate verification error was found by socket and if early error reporting was enabled in QSslConfiguration . An application is expected to inspect the error and decide if it wants to continue the handshake, or abort it and send an alert message to the peer. The signal-slot connection must be direct.

另请参阅 QSslSocket::continueInterruptedHandshake (), sslErrors ()，和 QSslConfiguration::setHandshakeMustInterruptOnError ().

int QSslServer:: handshakeTimeout () const

Returns the currently configured handshake timeout.

另请参阅 setHandshakeTimeout ().

[override virtual protected] void QSslServer:: incomingConnection ( qintptr socket )

重实现： QTcpServer::incomingConnection (qintptr socketDescriptor).

Called when a new connection is established.

转换 socket 到 QSslSocket .

[signal] void QSslServer:: peerVerifyError ( QSslSocket * socket , const QSslError & error )

QSslServer 可以在 SSL 握手期间多次发射此信号，在建立加密之前，以指示当建立对等方的标识时有发生错误。 error 通常指示 socket 无法安全标识对等方。

This signal provides you with an early indication when something's wrong. By connecting to this signal, you can manually choose to tear down the connection from inside the connected slot before the handshake has completed. If no action is taken, QSslServer 将继续进行以发射 sslErrors ().

另请参阅 sslErrors ().

[signal] void QSslServer:: preSharedKeyAuthenticationRequired ( QSslSocket * socket , QSslPreSharedKeyAuthenticator * authenticator )

QSslServer emits this signal when socket negotiates a PSK ciphersuite, and therefore PSK authentication is then required.

When using PSK, the server must supply a valid identity and a valid pre shared key, in order for the SSL handshake to continue. Applications can provide this information in a slot connected to this signal, by filling in the passed authenticator 对象根据需要。

注意： 忽略此信号或未能提供要求证书，将导致握手失败，因此连接将被中止。

注意： The authenticator object is owned by the socket and must not be deleted by the application.

另请参阅 QSslPreSharedKeyAuthenticator .

void QSslServer:: setHandshakeTimeout ( int timeout )

设置 timeout to use for all incoming handshakes, in milliseconds.

This is relevant in the scenario where a client, whether malicious or accidental, connects to the server but makes no attempt at communicating or initiating a handshake. QSslServer will then automatically end the connection after timeout milliseconds have elapsed.

By default the timeout is 5000 milliseconds (5 seconds).

注意： The underlying TLS framework may have their own timeout logic now or in the future, this function does not affect that.

注意： The timeout passed to this function will only apply to new connections. If a client is already connected it will use the timeout which was set when it connected.

另请参阅 handshakeTimeout ().

void QSslServer:: setSslConfiguration (const QSslConfiguration & sslConfiguration )

设置 sslConfiguration to use for all following incoming connections.

This must be called before listen () to ensure that the desired configuration was in use during all handshakes.

另请参阅 sslConfiguration () 和 QSslSocket::setSslConfiguration ().

QSslConfiguration QSslServer:: sslConfiguration () const

Returns the current ssl configuration.

另请参阅 setSslConfiguration ().

[signal] void QSslServer:: sslErrors ( QSslSocket * socket , const QList < QSslError > & errors )

QSslServer 发射此信号在 SSL 握手之后以指示当建立对等方标识时有发生一个或多个错误。错误通常指示 socket 无法安全地识别对等方。除非采取任何行动，连接将被丢弃在此信号被发射之后。

If you want to continue connecting despite the errors that have occurred, you must call QSslSocket::ignoreSslErrors () from inside a slot connected to this signal. If you need to access the error list at a later point, you can call sslHandshakeErrors().

errors 包含一个或多个错误阻止 QSslSocket 验证对等方身份。

注意： 不可以使用 Qt::QueuedConnection 当连接到此信号时，或调用 QSslSocket::ignoreSslErrors () 没有起作用。

另请参阅 peerVerifyError ().

[signal] void QSslServer:: startedEncryptionHandshake ( QSslSocket * socket )

This signal is emitted when the client, connected to socket , initiates the TLS handshake.

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