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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 the QNX OS 8.0.
Utilities & Libraries
Devctl and Ioctl Commands
DCMD_IP_*
DCMD_IP_SDESTADDR
Set the foreign address associated with a socket

QNX Momentics IDE User's Guide
This User's Guide describes version 8.0 of the Integrated Development Environment (IDE) that's part of the QNX 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 the QNX OS 8.0.
- Quickstart Guide
- System Architecture
  The System Architecture guide accompanies the QNX OS and is intended for both application developers and end-users.
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  - C Library Reference
  - Devctl and Ioctl Commands
    - BIOC*
    - CAN_DEVCTL_*
    - DCMD_ALL_*
    - DCMD_BLK_*
    - DCMD_CHR_*
    - DCMD_DUMPER_*
    - DCMD_F3S_*
    - DCMD_FSYS_*
    - DCMD_IP_*
      - DCMD_IP_FDINFO
        Get information about a socket
      - DCMD_IP_GDESTADDR
        Get the foreign address associated with a socket
      - DCMD_IP_GSRCADDR
        Get the local address associated with a socket
      - DCMD_IP_LISTEN
        Listen for connections on a socket, specifying a queue limit
      - DCMD_IP_SDESTADDR
        Set the foreign address associated with a socket
      - DCMD_IP_SHUTDOWN
        Set the method of shutting down a socket
      - DCMD_IP_SSRCADDR
        Set the local address to associate with a socket
    - DCMD_MEMMGR_*
    - DCMD_MISC_*
    - DCMD_MMCSD_*
    - DCMD_PROC_*
    - DCMD_PROF_*
    - DCMD_PTPD_*
    - DCMD_SDIO_*
    - DCMD_SDMMC_*
    - DCMD_SPI_*
    - PTP_*
    - FIO*
    - TC*
    - TIOC*
  - JSON Library Reference
  - PAM Reference
  - QNX Helpers Developer's Guide
    These libraries provide QNX helpers, including helpers that assist with logging, string conversion, and number and type sizes.
  - SPI Framework Technote
  - Utilities Reference
  - WPA Control Interface Reference
    This document provides a reference for the Wi-Fi Protected Access (WPA) control interface, which provides a C API for the WPA/IEEE 802.11i protocols in Wi-Fi client stations. Application developers who want to control WPA operations and get associated status and event data should read this reference.
- Migrating to QNX OS 8.0
QNX Software in the Cloud
QNX Software in the Cloud enables developers to use the QNX OS in the Amazon cloud environment.
QNX Toolkit for Visual Studio Code
This User's Guide describes the QNX^® Toolkit for Visual Studio Code. The guide introduces you to the QNX Toolkit by explaining the QNX development environment and how to build, run, and debug your QNX^® Operating System (OS) applications and systems.
QNX Hypervisor User's Guide
This User's Guide explains the QNX hypervisor architecture and provides instructions for installing and running a QNX Hypervisor system, changing system components and configuration, and using hypervisor features such as virtual devices (vdevs).
Typographical Conventions, Support, and Licensing
This section describes the typographical conventions used throughout the documentation, explains how to obtain technical support, and provides some information about licensing.

DCMD_IP_SDESTADDR

QNX SDP8.0Devctl and Ioctl CommandsDeveloper

Set the foreign address associated with a socket

Synopsis:

#include <sys/dcmd_ip.h>

/*
 * Desc:  Set foreign address to associate with socket.
 * Args:  Pointer to struct sockaddr from which address is taken.
 * Notes: Clients usually use connect() to generate this request.
 */
#define DCMD_IP_SDESTADDR       __DIOT(_DCMD_IP, 0x03, struct sockaddr)

Arguments to devctl():


Argument	Value
`filedes`	A descriptor for a socket.
`dcmd`	DCMD_IP_SDESTADDR
`dev_data_ptr`	A pointer to a struct sockaddr
`n_bytes`	`sizeof(struct sockaddr)`
`dev_info_ptr`	NULL

Description:

This command sets the foreign address associated with a socket. Clients usually use getpeername() to generate this request.

Input:

A struct sockaddr that contains the address.

Output:

None.

See also:

DCMD_IP_GDESTADDR, DCMD_IP_GSRCADDR, DCMD_IP_SSRCADDR

devctl() in the QNX OS C Library Reference

getpeername() in the QNX OS C Library Reference, G page

Page updated: March 05, 2025