Qt Network provides a set of APIs for programming applications that use TCP/IP. Operations such as requests, cookies, and sending data over HTTP are handled by various C++ classes.

Getting Started

To use Qt Network classes,add this directive into the C++ files:

#include <QtNetwork>

To link against the Qt Network module, add this line to the project file:

QT += network

Articles and Guides

These articles contain information about Qt Network setup and about applications with networking capabilities.

• Network Programming with Qt - Programming applications with networking capabilities
• Bearer Management - An API to control the system's connectivity state
• Secure Sockets Layer (SSL) Classes - Classes for secure communication over network sockets

API Reference

These are links to the API reference materials.

• C++ Classes

Licenses and Attributions

Qt Network is available under commercial licenses from The Qt Company. In addition, it is available under the GNU Lesser General Public License, version 3, or the GNU General Public License, version 2. See Qt Licensing for further details.

Qt Network can use the OpenSSL Toolkit as a backend. The library is then linked against OpenSSL in a way that requires compliance with the OpenSSL License. To allow linking OpenSSL with Qt Network under the GPL, following exceptions to the GPL do apply:

In addition, as a special exception, the copyright holders listed above give
permission to link the code of its release of Qt with the OpenSSL project's
"OpenSSL" library (or modified versions of the "OpenSSL" library that use the
same license as the original version), and distribute the linked executables.

You must comply with the GNU General Public License version 2 in all
respects for all of the code used other than the "OpenSSL" code.  If you
modify this file, you may extend this exception to your version of the file,
but you are not obligated to do so.  If you do not wish to do so, delete
this exception statement from your version of this file.

Also note shipping OpenSSL might cause Import and Export Restrictions to apply.