DLC Window Size Incrementer (uchMaxOutIncr) Does Not Operate Correctly

• Microsoft Windows 2000 Advanced Server
• Microsoft Windows 2000 Datacenter Server
• Microsoft Windows 2000 Professional
• Microsoft Windows 2000 Server

SYMPTOMS

The DLC protocol uses a sliding window algorithm similar to that of TCP (Transmission Control Protocol). When programming a connection, you can specify an increment counter (uchMaxOutIncr) to "tell" the session how much to increase the window size after each successful send acknowledgment.

Assuming an Increment counter of 1, the actual session traffic should look like

S Ack S S Ack S S S S Ack S S S S S S S S Ack ... and so on.


where S is a sent packet, and Ack is an acknowledgment.

Note that each S packet is being acknowledged so the increment counter is increased by 1 with every successful send. Also, note that the actual behavior of this exchange is unpredictable.

STATUS

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

Additional query words:

Keywords : kbtool kbui
Version : WINDOWS:2000
Platform : WINDOWS
Issue type : kbprb