BUG: Timing Crack Between FD_CONNECT and Call to Shut Down API

ID: Q186244

The information in this article applies to:

• Microsoft Windows NT 4.0

SYMPTOMS

When using WSAEventSelect, a call to the shutdown API shortly after receiving a FD_CONNECT notification might fail with WSAENOTCONN.

CAUSE

There is a timing crack between receipt of a FD_CONNECT notification and a subsequent call to the shutdown API where the system reports that the socket is not connected.

RESOLUTION

Use one of the following to work around this problem:

• Use a blocking call to the connect or WSAConnect API.
• If you receive WSAENOTCONN when calling the shutdown API, place the call to the shutdown API in a loop with a small delay (few milliseconds).

STATUS

Microsoft has confirmed this to be a bug in the Microsoft products listed at the beginning of this article.

Additional query words:

Keywords          : kbnetwork kbAPI kbNTOS400bug kbSDKPlatform kbWinsock kbGrpNet 
Issue type        : kbbug

Last Reviewed: November 21, 1998