- Qt 6.8
- Qt Network
- Qt 6.8.3 Reference Documentation

# Qt Network

The Qt Network module 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.

## Using the Module

Using a Qt module's C++ API requires linking against the module library, either directly or through other dependencies. Several build tools have dedicated support for this, including CMake and qmake.

### Building with CMake

Use the `find_package()` command to locate the needed module component in the `Qt6` package:

     find_package(Qt6 REQUIRED COMPONENTS Network)
     target_link_libraries(mytarget PRIVATE Qt6::Network)

For more details, see the Build with CMake overview.

### Building with qmake

To configure the module for building with qmake, add the module as a value of the `QT` variable in the project's .pro 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
- Secure Sockets Layer (SSL) Classes - Classes for secure communication over network sockets

## API Reference

These are links to the API reference materials.

- C++ Classes

## Module Evolution

Changes to Qt Network lists important changes in the module API and functionality that were done for the Qt 6 series of Qt.

## 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.

Furthermore, Qt Network in Qt 6.8.3 may contain third-party modules under the following permissive licenses:

The Public Suffix List, version 47264b57765919188b9f4144de8d95cf77e1b6dc, fetched on 2025-01-22 | Mozilla Public License 2.0
libpsl - C library to handle the Public Suffix List, version 664f3dc85259ec65e30248a61fa1c45b7b0e4c3f | BSD 3-clause "New" or "Revised" License

Qt Network can make use of the OpenSSL Toolkit as a back end. 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.