WSA_QOS_REQUEST_CONFIRMED - 11009 (0x2B01)

Reserve has been confirmed.

Updated: Feb 21, 2026

Introduction

The WSA_QOS_REQUEST_CONFIRMED error code, with the numeric value 11009 (0x2B01), is a specific return code used in Windows Sockets API operations. This article provides an interpretation of this error and its context within network programming.

Technical Meaning

The WSA_QOS_REQUEST_CONFIRMED error indicates that a Quality of Service (QoS) request has been successfully processed by the system. In the context of Windows Sockets, QoS is used to ensure that network traffic meets certain quality criteria, such as latency or bandwidth.

Error Details

This error code is typically returned when an application attempts to set up a QoS policy for a socket and the request is confirmed by the underlying system. It signifies that the requested QoS settings have been applied successfully.

Usage Context

The WSA_QOS_REQUEST_CONFIRMED error is commonly encountered in scenarios where applications need to configure network traffic with specific quality requirements, such as real-time communication or streaming services. Developers should check for this return code when setting up QoS policies and handle it appropriately within their application logic.

Developer Interpretation

When the WSA_QOS_REQUEST_CONFIRMED error is returned, developers can interpret that the requested Quality of Service settings have been successfully applied to the socket. This does not necessarily indicate a failure; rather, it confirms that the system has accepted and processed the QoS request.

Related Errors

  • WSAEINVAL (10022): Invalid argument passed to a Windows Sockets function.
  • WSAENOSYS (10038): The requested operation is not supported on this socket or system.

FAQ

Q: What does the WSA_QOS_REQUEST_CONFIRMED error mean?

A: It indicates that a Quality of Service request has been successfully processed by the system, confirming that the requested settings have been applied to the socket.

Q: How should I handle this error in my application?

A: You can safely ignore this error as it confirms successful processing. However, ensure that your application logic correctly handles other potential errors and edge cases.

Summary

The WSA_QOS_REQUEST_CONFIRMED error code is a confirmation that the system has successfully processed a Quality of Service request for a socket. Developers should understand its meaning and handle it appropriately within their network programming applications.