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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.
OS Components & Operations
User's Guide
The QNX Neutrino User's Guide is intended for all users of a QNX Neutrino RTOS system, from system administrators to end users.
TCP/IP Networking
The term TCP/IP implies two distinct protocols: TCP and IP. Since these protocols have been used so commonly together, TCP/IP has become a standard terminology in today's Internet. Essentially, TCP/IP refers to network communications where the TCP transport is used to deliver data across IP networks.
Software components for TCP/IP networking

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
- OS Components & Operations
  - Adaptive Partitioning User's Guide
  - Boot Optimization Guide
    The Boot Optimization Guide describes techniques you can use to reduce the time from your board's initial power on until you have a fully functional QNX system running on the board.
  - Building Embedded Systems
    The Building Embedded Systems guide is intended for developers who are developing or building BSPs for QNX Neutrino RTOS embedded systems.
  - Core Networking Stack User's Guide
    This guide introduces you to the QNX Neutrino Core Networking stack and its manager, io-pkt.
  - Customizing a BSP
    While QNX provides Board Support Packages (BSPs) for many common platforms and their individual variants, in some cases, you need a BSP for a board that QNX does not provide. If this is the case, you can modify a QNX BSP or develop your own.
  - Device Publishers Developer's Guide
  - High Availability Framework Developer's Guide
  - High-Performance Networking Stack (io-sock) User's Guide
    This guide contains instructions for implementing and using the QNX Neutrino High-Performance Networking Stack and its manager, io-sock.
  - Instant Device Activation
  - Migrating to QNX SDP 7.1
  - PCI Server User's Guide
  - Persistent Publish/Subscribe Developer's Guide
  - Platform-independent Publish/Subscribe Developer's Guide
    This guide is intended for application developers who want to use the Platform-independent Publish Subscribe (PiPS) framework to exchange information with other applications. First, the overall PiPS design and data-exchange model are explained. Then, tutorials on using PiPS are given. These tutorials cover key tasks such as selecting a publish-subscribe provider to use and writing plugins that read and write custom data types.
  - QDB Developer's Guide
  - QNX Helpers Developer's Guide
    These libraries provide QNX helpers, including helpers that assist with logging, string conversion, and number and type sizes.
  - SMMUMAN User's Guide
  - System Analysis Toolkit (SAT) User's Guide
  - System Architecture
    The System Architecture guide accompanies the QNX Neutrino RTOS and is intended for both application developers and end-users.
  - Technotes
  - User's Guide
    The QNX Neutrino User's Guide is intended for all users of a QNX Neutrino RTOS system, from system administrators to end users.
    - Getting to Know the OS
      Welcome to the QNX Neutrino RTOS!
    - Logging In, Logging Out, and Shutting Down
      QNX Neutrino is a multiuser operating system; it lets multiple users log in and use the system simultaneously, and it protects them from each other through a system of resource ownership and permissions.
    - Managing User Accounts
      This chapter explains how user accounts work, how users can change their password by using the passwd utility, and how system administrators can use the passwd utility and edit account database files to create and maintain users' accounts.
    - Using the Command Line
      Like QNX 4, Unix, and DOS, the QNX Neutrino RTOS is based on a command-line interface that you might want or need to use instead of the GUI.
    - Working with Files
      In a QNX Neutrino system, almost everything is a file; devices, data, and even services are all typically represented as files. This lets you work with local and remote resources easily from the command line, or through any program that works with files.
    - Using Editors
      An editor is a utility designed to view and modify files.
    - Configuring Your Environment
      The Controlling How QNX Neutrino Starts chapter describes what happens when you boot your system, and what you can do to customize the system. This chapter describes how you can customize the environment that you get when you log in, and then describes some of the setup you might need to do.
    - Writing Shell Scripts
      Shell scripting, at its most basic, is taking a series of commands you might type at a command line and putting them into a file, so you can reproduce them again at a later date, or run them repeatedly without having to type them over again.
    - Working with Filesystems
      The QNX Neutrino RTOS provides a variety of filesystems, so that you can easily access DOS, Linux, as well as native Power-Safe disks.
    - Using Qnet for Transparent Distributed Processing
      A QNX Neutrino native network is a group of interconnected computers running only the QNX Neutrino RTOS. In this network, a program can transparently access any resource—whether it's a file, a device, or a process—on any other node (computer) in your local subnetwork. You can even run programs on other nodes.
    - TCP/IP Networking
      The term TCP/IP implies two distinct protocols: TCP and IP. Since these protocols have been used so commonly together, TCP/IP has become a standard terminology in today's Internet. Essentially, TCP/IP refers to network communications where the TCP transport is used to deliver data across IP networks.
      - Overview of TCP/IP
        Let's start with some definitions.
      - Software components for TCP/IP networking
      - Running the Internet daemons
        If a host is a server, it invokes the appropriate daemon to satisfy a client's requests. A TCP/IP server typically runs the inetd daemon, also known as the Internet super-server.
      - Running multiple instances of the TCP/IP stack
        If your system has more than one Network Interface Card, you may need to run multiple instances of the TCP/IP stack.
      - Dynamically assigned TCP/IP parameters
        When you add a host to the network or connect your host to the Internet, you need to assign an IP address to your host and set some other configuration parameters.
      - Troubleshooting
        If you're having trouble with your TCP/IP network (e.g., you can't send packets over the network), you need to use several utilities for troubleshooting. These utilities query hosts, servers, and the gateways to fetch diagnostic information to locate faults.
    - Backing Up Data
      No matter how reliable your hardware and electrical supply are, or how sure you are that you'll never accidentally erase all your work, it's just common sense to keep backups of your files. Backup strategies differ in ease of use, speed, robustness, and cost.
    - Securing Your System
      Now that more and more computers and other devices are hooked up to insecure networks, security has become a very important issue. The word security can have many meanings, but in a computer context, it generally means preventing unauthorized people from making your computer do things that you don't want it to do.
    - Fine-Tuning Your System
      This chapter describes how you can improve your system's performance.
    - Understanding System Limits
      Resources on a system tend to be finite (alas!), and some are more limited than others. This chapter describes some of the limits on a QNX Neutrino system.
    - Technical Support
      If you have any problems using QNX Neutrino, the first place to look for help is in the documentation.
    - Glossary
    - Examples
      This appendix includes samples of some of the files described in this guide.
- Audio & Graphics API
- Multimedia
- Networking Middleware
- 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.

Software components for TCP/IP networking

To use TCP/IP, you need the following software components:

TCP/IP components — Figure 1Components of TCP/IP in QNX Neutrino.

io-pkt*: Manager that provides support for dynamically loaded networking modules. It includes a fully featured TCP/IP stack derived from the NetBSD code base.
devnp-*: Managers that form an interface with the hardware.

Note:

The High-Performance Networking Stack (io-sock) is available as an alternative to io-pkt. Systems can use io-pkt or io-sock, but not both. For more information, see the High-Performance Networking Stack User's Guide.

To set configuration parameters, use the ifconfig and route utilities, as described below.

If you're using the Dynamic Host Configuration Protocol (DHCP), you can use dhclient to set the configuration parameters for you as provided by the DHCP server.

The TCP/IP stack is based on the NetBSD TCP/IP stack, and it supports similar features. To configure the stack, use the ifconfig and route utilities as described below.

To configure an interface with an IP address, you must use the ifconfig utility. To configure your network interface with an IP address of 10.0.0.100, you would use the following command:

ifconfig if_name 10.0.0.100

where if_name is the interface name that the driver uses.

If you also want to specify your gateway, use the route command:

route add default 10.0.0.1

This configures the gateway host as 10.0.0.1.

If you then want to view your network configuration, use the netstat command (netstat -in displays information about the network interfaces):

Name Mtu    Network   Address           Ipkts Ierrs Opkts Oerrs Coll
lo0  32976  <Link>                       0    0     0     0     0
lo0  32976  127       127.0.0.1          0    0     0     0     0
en0  1500   <Link>    00:50:da:c8:61:92 21    0     2     0     0
en0  1500   10        10.0.0.100        21    0     2     0     0

To display information about the routing table, use netstat -rn; the resulting display looks like this:

Routing tables

Internet:
Destination Gateway    Flags Refs Use Mtu Interface
default     10.0.0.1   UGS   0    0   -   en0
10          10.0.0.100 U     1    0   -   en0
10.0.0.100  10.0.0.100 UH    0    0   -   lo0
127.0.0.1   127.0.0.1  UH    0    0   -   lo0

The table shows that the default route to the gateway was configured (10.0.0.1).

Page updated: March 12, 2026