Windows Sockets Programs Using WSIPX May Not Work

ID: Q159254

The information in this article applies to:

Microsoft Windows 95

SYMPTOMS

Windows Sockets programs that use the IPX protocol in Windows 95 may not work correctly. The program may indicate an "out of memory" error message.

One such program is Attachmate Extra Personal Client, which may not finish Setup successfully or generate error messages when it lists servers. After creating a socket, the program's Windows Sockets Bind() call fails with WSAENOBUFS(10055).

CAUSE

WSIPX calls IFSMGR to allocate memory from IFSMGR's heap. If IFSMGR is out of heap space and the allocation request is for less than one page (4 KB), IFSMGR does not grow the heap because it assumes this is an interrupt time allocation.

RESOLUTION

This issue is resolved by the following updated file for Windows 95, and later versions of this file:


    WSIPX.VXD  version 4.0.953  dated 11/4/96  14,545 bytes

A version of this file that also resolves this problem is included in the Windows Sockets 2.0 Update for Windows 95. For information about obtaining this update, see the following article in the Microsoft Knowledge Base:

Q182108 Availability of Windows Sockets 2.0 for Windows 95

The updated WSIPX resolves this problem by calling IFSMGR, when needed, to explicitly grow the heap.

STATUS

Microsoft has confirmed this to be a problem in Microsoft Windows 95. An update to address this problem is now available, but is not fully regression tested and should be applied only to computers experiencing this specific problem. Unless you are severely impacted by this specific problem, Microsoft does not recommend implementing this update at this time. Contact Microsoft Technical Support for additional information about the availability of this update.

This issue is resolved in Microsoft Windows 98.

MORE INFORMATION

For additional information about issues resolved by updates to this component, please see the following articles in the Microsoft Knowledge Base:

Q171352 Large Data Transfer Using WinSock Over SPX May Not Work

Q163378 Microsoft Exchange Hangs Sending Message Using SPX

Q163329 Fatal Exception 0E in WSIPX Using Windows Sockets Program

Q161179 WinSock Zero-Length Packet Not Sent on Network

Q155675 IPX Headers Not Returned to WinSock Program

For additional information about Windows 95 updates, please see the following article in the Microsoft Knowledge Base:

Q161020 Implementing Windows 95 Updates

The third-party products discussed here are manufactured by vendors independent of Microsoft; we make no warranty, implied or otherwise, regarding these products' performance or reliability.

Keywords : kberrmsg kbnetwork msnets win95 kbAPI kbSDKPlatform kbWinsock kbGrpNet
Version : WINDOWS:95
Platform : WINDOWS
Issue type : kbprb