WSAENOTSOCK - 10038 (0x2736)

Technical Meaning

The error code WSAENOTSOCK (10038, 0x2736) indicates that an operation was attempted on something that is not a socket. This error typically occurs when the API function expects a valid socket descriptor but receives another type of file handle or object.

Error Details

This error code is specific to the Windows Sockets (Winsock) API and is returned by various Winsock functions if an operation was attempted on something that is not a socket. For example, attempting to bind a non-socket file descriptor to a network address will result in this error.

Usage Context

The WSAENOTSOCK error can occur in several scenarios within the Windows Sockets API:

• Socket Creation: Attempting to create a socket with an invalid or unsupported type of handle.
• Socket Operations: Performing operations such as binding, connecting, listening, accepting, or sending/receiving data on non-socket handles.
• File Descriptors: Using file descriptors that are not associated with sockets in functions expecting socket descriptors.

Developer Interpretation

Developers should ensure that all operations involving the Windows Sockets API are performed using valid socket descriptors. This includes verifying that:

• The correct type of handle is passed to socket creation functions.
• All subsequent operations on a file descriptor are appropriate for sockets and not other types of files or handles.

Related Errors

• WSAEINVAL: Invalid argument was supplied to the function, which may include passing an invalid socket descriptor.
• WSAEISCONN: The operation cannot be performed on a connection-oriented socket that is already connected.
• WSAENOTCONN: The operation cannot be performed on a connectionless socket that is not connected.

FAQ

Q: What does WSAENOTSOCK mean?

A: WSAENOTSOCK indicates an attempt to perform an operation on something that is not a socket. Ensure all operations are using valid socket descriptors.

Q: How can I avoid this error?

A: Verify that you are passing valid socket descriptors to all Winsock API functions and ensure that the file handles or objects used are appropriate for socket operations.

Summary

The WSAENOTSOCK error code is a generic indication of an operation being performed on something that is not a socket. Developers should carefully validate their use of socket descriptors in Windows Sockets API calls to avoid this and other related errors.