SLI_SEND/SLI_RECEIVE Can Send/Receive A Maximum Of 65 KB Of Data

ID: Q186054

The information in this article applies to:

Microsoft SNA Server, versions 2.1, 2.11, 2.11 SP1, 2.11 SP2, 3.0, 3.0 SP1, 3.0 SP2, 3.0 SP3, 4.0, 4.0 SP1

SYMPTOMS

The SLI_SEND and SLI_RECEIVE verbs can only send or receive a maximum of 65 kilobytes (KB) of data each time they are issued by a SLI application.

The lua_data_length parameter is used to specify the amount of data to be sent in a SLI_SEND verb. The SLI_RECEIVE verb uses the lua_max_length parameter to specify the length of the buffer that is to be used to receive data.

CAUSE

The 65-KB data length per SLI_SEND/SLI_RECEIVE is by design. The lua_data_length and lua_max_length parameters are defined as Unsigned Integers (unsigned int), which limits their maximum values to 2^16 bytes (approximately 65 KB).

RESOLUTION

Microsoft has confirmed this to be a problem in SNA Server versions 2.1, 2.11, 2.11 SP1, 2.11 SP2, 3.0, 3.0 SP1, 3.0 SP2, 3.0 SP3, 4.0, and 4.0 SP1.

SNA Server 3.0

A supported fix that corrects this problem is now available from Microsoft, but has not been fully regression tested and should be applied only to systems experiencing this specific problem. To resolve this problem immediately, contact Microsoft Technical Support to obtain the fix. If you are not severely impacted by this specific problem, Microsoft recommends that you wait for the next SNA Server 3.0 service pack that contains this fix.

For SNA Server 3.0:


      File Name        Date       Time
      ----------------------------------
      winsli32.dll    6/16/98  8:32AM
      snatrc.dll      6/16/98  8:29AM
      snatrccn.dll    6/16/98  8:29AM
      snatrcsn.dll    6/16/98  8:29AM

NOTE: If you contact Microsoft to obtain this fix, a fee may be charged. This fee is refundable if it is determined that you only require the fix you requested. However, this fee is non-refundable if you request additional technical support, if your no-charge technical support period has expired, or if you are not eligible for standard no-charge technical support.

For more information about eligibility for no-charge technical support, see the following article in the Microsoft Knowledge Base:

Q154871 Determining If Your Product Is Eligible for No-Charge Technical Support

SNA Server 4.0

This problem was corrected in the latest Microsoft SNA Server version 4.0 U.S. Service Pack. For information on obtaining this Service Pack, query on the following word in the Microsoft Knowledge Base (without the spaces):

S E R V P A C K

MORE INFORMATION

The SLI API has been extended to include the following new verbs:

SLI_SEND_EX

SLI_RECEIVE_EX

These new verbs can be used instead of SLI_SEND and SLI_RECEIVE in those SLI applications that require sending or receiving more than 65 KB of data with each send or receive issued. These new SLI verbs include the following new parameters:


   SLI_SEND_EX:     lua_data_length_ex
   SLI_RECEIVE_EX:  lua_max_length_ex

Each of these new parameters is defined as Unsigned Long Integers (unsigned long), which allows their maximum values to be 2^32 bytes (approximately 4 GB).

These SLI API updates are available after applying the fix or service pack mentioned previously.

Please refer to the SNA Server LUA Programmer's Guide for more details on both the RUI and SLI APIs included with SNA Server.

Additional query words: snalua snaprog

Keywords :
Version : WINDOWS:2.1,2.11,2.11 SP1,2.11 SP2,3.0,3.0 SP1,3.0 SP2,3.0 SP3,4.0,4.0 SP1
Platform : WINDOWS
Issue type : kbbug