DOCUMENT:Q151409 13-JUN-2001 [sna] TITLE :RUI_BID Improperly Handles Lua_Peek_Data Causing Data Truncation PRODUCT :Microsoft SNA Server PROD/VER:WINDOWS:2.11 SP1 OPER/SYS: KEYWORDS:kbnetwork kbprogramming ====================================================================== ------------------------------------------------------------------------------- The information in this article applies to: - Microsoft SNA Server, version 2.11 SP1, on platform(s): - the operating system: Microsoft Windows NT ------------------------------------------------------------------------------- SYMPTOMS ======== If an LUA RUI application calls RUI_BID followed by RUI_READ, the read data may be missing the leading bytes returned in the RUI_BID lua_peek_data. For example: 1. Verb: RUI_BID Description: Notifies the RUI application that a message is waiting to be read using RUI_READ. Returns: lua_peek_data (Contains the first 12 bytes of the message data) 2. Verb: RUI_READ Description: Receives responses, SNA commands, and data into Windows LUA application's buffer Returns: the data that has been requested Using these verbs in this sequence results in the following: Verb: Returns: RUI_BID the first 12 bytes of the data RUI_READ the 13th through xx bytes of the data. The first 12 bytes are missing in the response. CAUSE ===== The RUI_BID verb is attempting to handle the data instead of just "peeking" at it without making any modifications. Then when the RUI_READ verb is called, it checks to see if the first 12 bytes have been read. Since RUI_BID has modified the data, RUI_READ only reads in the 13th through xx bytes of data. STATUS ====== Microsoft has confirmed this to be a problem in Microsoft SNA Server 2.11 Service Pack 1. This problem was corrected in the latest Microsoft SNA Server 2.11 U.S. Service Pack. For information on obtaining the service pack, query on the following word in the Microsoft Knowledge Base (without the spaces): S E R V P A C K Additional query words: prodsna winrui sp1 ====================================================================== Keywords : kbnetwork kbprogramming Technology : kbAudDeveloper kbSNAServSearch Version : WINDOWS:2.11 SP1 Issue type : kbbug ============================================================================= THE INFORMATION PROVIDED IN THE MICROSOFT KNOWLEDGE BASE IS PROVIDED "AS IS" WITHOUT WARRANTY OF ANY KIND. MICROSOFT DISCLAIMS ALL WARRANTIES, EITHER EXPRESS OR IMPLIED, INCLUDING THE WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE. IN NO EVENT SHALL MICROSOFT CORPORATION OR ITS SUPPLIERS BE LIABLE FOR ANY DAMAGES WHATSOEVER INCLUDING DIRECT, INDIRECT, INCIDENTAL, CONSEQUENTIAL, LOSS OF BUSINESS PROFITS OR SPECIAL DAMAGES, EVEN IF MICROSOFT CORPORATION OR ITS SUPPLIERS HAVE BEEN ADVISED OF THE POSSIBILITY OF SUCH DAMAGES. SOME STATES DO NOT ALLOW THE EXCLUSION OR LIMITATION OF LIABILITY FOR CONSEQUENTIAL OR INCIDENTAL DAMAGES SO THE FOREGOING LIMITATION MAY NOT APPLY. Copyright Microsoft Corporation 2001.