Microsoft KB Archive/174158

{|
 * width="100%"|

PRB: MSG_OOB and MSG_DONTROUTE Not Supported Over IPX Sockets

 * }

Q174158

-

The information in this article applies to:


 * Microsoft Win32 Application Programming Interface (API), included with:
 * Microsoft Windows 95

-

SYMPTOMS
When you use the WinSock send or sendto APIs on Windows 95 to send over an IPX/SPX socket, the MSG_DONTROUTE and MSG_OOB flags are not supported.

With the version of WSIPX (Windows Sockets support for IPX/SPX) that ships with Windows 95, setting these flags will have no effect. However, with newer versions of WSIPX the call will fail if these flags are set. GetLastError will return WSAEOPNOTSUPP (error 10045).

CAUSE
There is no implementation provided in the IPX/SPX Compatible protocol for handling Out-Of-Band (Urgent) data, or for making IPX packets non-routable.

RESOLUTION
When using IPX/SPX sockets and calling send or sendto, do not set the MSG_DONTROUTE or MSG_OOB flags.

STATUS
This behavior is by design.

MORE INFORMATION
Additional query words:

Keywords : kbnetwork kbAPI kbSDKPlatform kbOSWin95 kbWinsock kbGrpDSNet

Issue type : kbprb

Technology : kbAudDeveloper kbWin32sSearch kbWin32API