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QNX Software Development Platform
QNX SDP is a cross-compiling and debugging environment, including an IDE and command-line tools, for building binary images and programs for target boards running QNX Neutrino 7.1.
Networking Middleware
Networking Middleware C API Reference
QNX SDP Networking Middleware C API
The Networking Middleware package provides reliable network management and Wi-Fi configuration services on systems running QNX Neutrino. The framework offers a feature-rich C API for clients to interact with these services.
qwf_net.h
This file defines the interface to the Network Manager (NET MGR) service.
qwf_net_GetDefaultInterface()
Get the name of the default network interface

QNX Momentics IDE User's Guide
This User's Guide describes version 7.1 of the Integrated Development Environment (IDE) that's part of the QNX Momentics tool suite.
QNX Software Development Platform
QNX SDP is a cross-compiling and debugging environment, including an IDE and command-line tools, for building binary images and programs for target boards running QNX Neutrino 7.1.
- Quickstart Guide
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- Networking Middleware
  - Networking Middleware Architecture Guide
  - Networking Middleware C API Reference
    - QNX SDP Networking Middleware C API
      The Networking Middleware package provides reliable network management and Wi-Fi configuration services on systems running QNX Neutrino. The framework offers a feature-rich C API for clients to interact with these services.
      - qwf_interface.h
        This file defines the entry point interface of the API.
      - qwf_net.h
        This file defines the interface to the Network Manager (NET MGR) service.
        Network Manager service constants
        Limits on Network Manager field sizes, and number of DNS name servers
        qwf_net_Connect()
        Inform NET MGR about a connected interface
        qwf_net_ConnectData_t
        Data for a connected network interface
        qwf_net_Disconnect()
        Inform NET MGR about a disconnected interface
        qwf_net_Event_t
        QWF Network Manager event information delivered by the API to the client callback function
        qwf_net_EventClientCallback_t
        QWF Network Manager event-handler prototype
        qwf_net_EventCode_e
        QWF Network Manager service event codes
        qwf_net_GetAvailableInterfaces()
        Get the list of interfaces known by NET MGR
        qwf_net_GetDefaultInterface()
        Get the name of the default network interface
        qwf_net_GetInterfaceData()
        Get the data for the specified network interface
        qwf_net_GetPriorityList()
        Get the interface priority list used by NET MGR
        qwf_net_IfaceList_t
        Structure type for holding a list of network interfaces
        qwf_net_IfName_t
        String type for interface names
        qwf_net_IfType_e
        Network interface types
        qwf_net_InterfaceData_t
        Network interface data
        qwf_net_IpAddrStr_t
        String type for IP addresses
        qwf_net_IpConfigMethod_e
        IP configuration methods for network interfaces
        qwf_net_RegisterCallback()
        Register an event handler with the QWF Network Manager service
        qwf_net_Results_e
        QWF Network Manager service return codes
      - qwf_wifi.h
        This file defines the interface to the Wi-Fi Manager service.
    - Code Examples
  - Networking Middleware Services Reference
- Programming
- Sensor Framework
- System Security Guide
  The QNX System Security Guide is intended for both system integrators who are responsible for the security of a QNX Neutrino RTOS system and developers who want to create a QNX Neutrino resource manager free from vulnerabilities.
- Utilities & Libraries
QNX Hypervisor
The QNX Hypervisor allows you to run multiple OSs on a target system so you can separate critical and non-critical functions, support a wide variety of applications, and reduce hardware costs.
QNX Software in the Cloud
QNX Software in the Cloud enables developers to use the QNX software in Amazon Web Services (AWS) and Microsoft Azure (Azure).
QNX Advanced Virtualization Frameworks User's Guide
This User's Guide is aimed at all systems integrators and developers who want to design and build embedded systems using the QNX Advanced Virtualization Frameworks.
Typographical Conventions, Support, and Licensing
This section describes the typographical conventions used throughout the documentation and explains how to obtain technical support.

qwf_net_GetDefaultInterface()

Get the name of the default network interface

Synopsis:

#include <qwf/qwf_net.h>

qwf_net_Results_e qwf_net_GetDefaultInterface(qwf_Context_t *pCtx,
                                              qwf_net_IfName_t *pIfName)

Arguments:

pCtx: A pointer to the QWF service context
pIfName: A pointer to a qwf_net_IfName_t object for storing the name of the default network interface being used by the device

Library:

qwf_interface

Returns:

NET_OK Successful result

NET_ERR_INACTIVE The QWF Network Manager service is inactive or not ready

NET_ERR_INT The QWF Network Manager service couldn't issue the request or read the response

NET_ERR_PARAM A pointer argument is NULL or the QWF Network Manager context can't be retrieved

Page updated: March 12, 2026