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Q156749: WSAAsyncGetHostByName() Returns IP Address in Reverse Order

Article: Q156749
Product(s): Microsoft Windows NT
Version(s): MS-DOS:3.0; :2.2c
Operating System(s): 
Keyword(s): kbnetwork msnets
Last Modified: 03-NOV-1999

-------------------------------------------------------------------------------
The information in this article applies to:

- Microsoft Network Client for MS-DOS version 3.0 
- Microsoft LAN Manager, version 2.2c 
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SYMPTOMS
========

Winsock Applications that issue a WSAAsyncGetHostByName() against MS real mode
TCP/IP Winsock.dll receive IP address in reverse order

A Winsock application such as Internet Explorer 2.01 or Netscape 2.02 running on
Windows 3.1 with MS real mode TCP/IP stack will fail to connect a remote host
when the application issues a WSAAsyncGetHostByName() to resolve the remote host
name to IP address. For example, WSAAsyncGetHostByName() will return
"99.88.77.66" if the remote host IP address is "66.77.88.99".

CAUSE
=====

The Winsock.dll, distributed with real mode TCP/IP for LAN Manager and MS
Network Client, improperly formats the IP address.

WORKAROUND
==========

To work around the problem, try to use GetHostByName() instead of the
WSAAsyncGetHostByName() call.

A work around for Internet Explorer is to put Use_Async_DNS=no in the [Services]
section of Iexplore.ini. This forces the Net_MultiGetHostByName_Async (w32net.c)
to call WS_GETHOSTBYNAME instead of WS_WSAASYNCGETHOSTBYNAME.


STATUS
======

Microsoft has confirmed this to be a problem in Microsoft Network Client
3.0 and Lan Manager 2.2c.

Additional query words:

======================================================================
Keywords          : kbnetwork msnets 
Technology        : kbAudDeveloper kbZNotKeyword kbLanManSearch kbNetworkClientSearch kbLanMan220c kbNetworkClient300DOS
Version           : MS-DOS:3.0; :2.2c
Issue type        : kbbug

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