1 files changed, 138 insertions, 0 deletions
diff --git a/src/network/doc/snippets/code/src_network_ssl_qdtls.cpp b/src/network/doc/snippets/code/src_network_ssl_qdtls.cpp
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+++ b/src/network/doc/snippets/code/src_network_ssl_qdtls.cpp
@@ -0,0 +1,138 @@
+/****************************************************************************
+**
+** Copyright (C) 2018 The Qt Company Ltd.
+** Contact: https://www.qt.io/licensing/
+**
+** This file is part of the documentation of the Qt Toolkit.
+**
+** $QT_BEGIN_LICENSE:BSD$
+** Commercial License Usage
+** Licensees holding valid commercial Qt licenses may use this file in
+** accordance with the commercial license agreement provided with the
+** Software or, alternatively, in accordance with the terms contained in
+** a written agreement between you and The Qt Company. For licensing terms
+** and conditions see https://www.qt.io/terms-conditions. For further
+** information use the contact form at https://www.qt.io/contact-us.
+**
+** BSD License Usage
+** Alternatively, you may use this file under the terms of the BSD license
+** as follows:
+**
+** "Redistribution and use in source and binary forms, with or without
+** modification, are permitted provided that the following conditions are
+** met:
+**   * Redistributions of source code must retain the above copyright
+**     notice, this list of conditions and the following disclaimer.
+**   * Redistributions in binary form must reproduce the above copyright
+**     notice, this list of conditions and the following disclaimer in
+**     the documentation and/or other materials provided with the
+**     distribution.
+**   * Neither the name of The Qt Company Ltd nor the names of its
+**     contributors may be used to endorse or promote products derived
+**     from this software without specific prior written permission.
+**
+**
+** THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
+** "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
+** LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
+** A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
+** OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
+** SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
+** LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
+** DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
+** THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
+** (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
+** OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE."
+**
+** $QT_END_LICENSE$
+**
+****************************************************************************/
+
+//! [0]
+// A client initiates a handshake:
+QUdpSocket clientSocket;
+QDtls clientDtls;
+clientDtls.setPeer(address, port, peerName);
+clientDtls.doHandshake(&clientSocket);
+
+// A server accepting an incoming connection; address, port, clientHello are
+// read by QUdpSocket::readDatagram():
+QByteArray clientHello(serverSocket.pendingDatagramSize(), Qt::Uninitialized);
+QHostAddress address;
+quin16 port = {};
+serverSocket.readDatagram(clientHello.data(), clientHello.size(), &address, &port);
+
+QDtls serverDtls;
+serverDtls.setPeer(address, port);
+serverDtls.doHandshake(&serverSocket, clientHello);
+
+// Handshake completion, both for server and client:
+void DtlsConnection::continueHandshake(const QByteArray &datagram)
+{
+    if (dtls.doHandshake(&udpSocket, datagram)) {
+        // Check handshake status:
+        if (dtls.handshakeStatus() == QDlts::HandshakeComplete) {
+            // Secure DTLS connection is now established.
+        }
+    } else {
+        // Error handling.
+    }
+}
+
+//! [0]
+
+//! [1]
+DtlsClient::DtlsClient()
+{
+    // Some initialization code here ...
+    connect(&clientDtls, &QDtls::handshakeTimeout, this, &DtlsClient::handleTimeout);
+}
+
+void DtlsClient::handleTimeout()
+{
+    clientDtls.handleTimeout(&clientSocket);
+}
+//! [1]
+
+//! [2]
+// Sending an encrypted datagram:
+dtlsConnection.writeDatagramEncrypted(&clientSocket, "Hello DTLS server!");
+
+// Decryption:
+QByteArray encryptedMessage(dgramSize);
+socket.readDatagram(encryptedMessage.data(), dgramSize);
+const QByteArray plainText = dtlsConnection.decryptDatagram(&socket, encryptedMessage);
+//! [2]
+
+//! [3]
+DtlsClient::~DtlsClient()
+{
+    clientDtls.shutdown(&clientSocket);
+}
+//! [3]
+
+//! [4]
+auto config = QSslConfiguration::defaultDtlsConfiguration();
+config.setDtlsCookieVerificationEnabled(false);
+// Some other customization ...
+dtlsConnection.setDtlsConfiguration(config);
+//! [4]
+
+//! [5]
+if (!dtls.doHandshake(&socket, dgram)) {
+    if (dtls.dtlsError() == QDtlsError::PeerVerificationError)
+        dtls.abortAfterError(&socket);
+}
+//! [5]
+
+//! [6]
+QList<QSslCertificate> cert = QSslCertificate::fromPath(QLatin1String("server-certificate.pem"));
+QSslError error(QSslError::SelfSignedCertificate, cert.at(0));
+QList<QSslError> expectedSslErrors;
+expectedSslErrors.append(error);
+
+QDtls dtls;
+dtls.ignoreVerificationErrors(expectedSslErrors);
+dtls.doHandshake(udpSocket);
+//! [6]
+