FIX: You may receive an alignment exception when you try to initiate a PPTP connection or a public network connection may disconnect despite the IdleTimeoutMS setting in the registry in Windows CE 5.0 (842550)


The information in this article applies to:

  • Microsoft Windows CE 5.0

SYMPTOMS

In Microsoft Windows CE 5.0, you may experience the following problems:
  • A Windows CE device is configured as a network gateway. When a client computer on the private network side of the Windows CE device tries to initiate a PPTP connection, the Windows CE device may fail and you may receive an alignment exception. This problem is most likely to occur when the public side of the network uses packet compression, such as a 1xRTT radio link.
  • When the public network connection is auto-dialed for Internet Connection Sharing but there is no current activity, the dialed connection may be disconnected after less than 430 seconds. This behavior occurs despite the setting of the IdleTimeoutMS registry option. This behavior may cause more frequent disconnects and redials than you want.

CAUSE

When a PTPP packet arrives on the public interface, the Internet Protocol Network Address Translation (IPNAT) code tries to examine the packet to route to the private network. With header compression on the incoming packet, some fields are not aligned on WORD boundaries. This behavior causes a data alignment fault in the microprocessor when IPNAT accesses the fields.

RESOLUTION

Software update information

A supported software update is now available from Microsoft as Windows CE 5.0 Core OS QFE 842550. To resolve this problem immediately, click the following article number for information about obtaining Windows CE Platform Builder and core operating system software updates:

837392 How to locate core operating system fixes for Microsoft Windows CE Platform Builder products

Prerequisites

This software update is supported only if all previously issued software updates for this product have also been installed.

Restart requirement

After you install this software update, you must perform a clean build of the whole platform. To clean the platform, click Clean on the Build menu. To build the platform, click Build Platform on the Build menu. You do not have to restart your computer after you apply this software update.

Software update replacement information

This software update does not replace any other software updates.

File information

The English version of this software update package has the file attributes or later file attributes that are listed in the following table:
   Date         Time   Size     File name
   --------------------------------------------------------------------
   25-Jan-2005  23:08  943,104  Wincepb50-050117-kb842550-armv4i.msi
   25-Jan-2005  23:08  978,944  Wincepb50-050117-kb842550-mipsii.msi
   25-Jan-2005  23:08  978,944  Wincepb50-050117-kb842550-mipsii_fp.msi
   25-Jan-2005  23:08  980,992  Wincepb50-050117-kb842550-mipsiv.msi
   25-Jan-2005  23:08  980,992  Wincepb50-050117-kb842550-mipsiv_fp.msi
   25-Jan-2005  23:08  916,992  Wincepb50-050117-kb842550-sh4.msi
   25-Jan-2005  23:08  871,936  Wincepb50-050117-kb842550-x86.msi
The English version of this software update has the file attributes (or later file attributes) that are listed in the following table. The dates and times for these files are listed in coordinated universal time (UTC). When you view the file information, it is converted to local time. To find the difference between UTC and local time, use the Time Zone tab in the Date and Time tool in Control Panel. 
   Date         Time   Size     File name
   -------------------------------------------

   Path: Public\Common\Oak\Lib\Armv4i\Debug
   29-Dec-2004  03:55  122,136  Autodial.lib
   29-Dec-2004  03:55  110,592  Autodial.pdb
   29-Dec-2004  03:55  722,956  Natlib.lib
   29-Dec-2004  03:55  102,400  Natlib.pdb

   Path: Public\Common\Oak\Lib\Armv4i\Retail
   29-Dec-2004  03:55   84,398  Autodial.lib
   29-Dec-2004  03:55  110,592  Autodial.pdb
   29-Dec-2004  03:55  486,286  Natlib.lib
   29-Dec-2004  03:55  102,400  Natlib.pdb

   Path: Public\Common\Oak\Lib\Mipsii\Debug
   29-Dec-2004  03:56  129,656  Autodial.lib
   29-Dec-2004  03:56  110,592  Autodial.pdb
   29-Dec-2004  03:56  710,342  Natlib.lib
   29-Dec-2004  03:56  102,400  Natlib.pdb

   Path: Public\Common\Oak\Lib\Mipsii\Retail
   29-Dec-2004  03:56   83,942  Autodial.lib
   29-Dec-2004  03:56  110,592  Autodial.pdb
   29-Dec-2004  03:56  484,978  Natlib.lib
   29-Dec-2004  03:56  102,400  Natlib.pdb

   Path: Public\Common\Oak\Lib\Mipsii_fp\Debug
   29-Dec-2004  03:57  129,676  Autodial.lib
   29-Dec-2004  03:57  110,592  Autodial.pdb
   29-Dec-2004  03:57  710,492  Natlib.lib
   29-Dec-2004  03:57  102,400  Natlib.pdb

   Path: Public\Common\Oak\Lib\Mipsii_fp\Retail
   29-Dec-2004  03:57   83,956  Autodial.lib
   29-Dec-2004  03:57  110,592  Autodial.pdb
   29-Dec-2004  03:57  485,128  Natlib.lib
   29-Dec-2004  03:57  102,400  Natlib.pdb

   Path: Public\Common\Oak\Lib\Mipsiv\Debug
   29-Dec-2004  03:58  130,188  Autodial.lib
   29-Dec-2004  03:58  110,592  Autodial.pdb
   29-Dec-2004  03:58  711,542  Natlib.lib
   29-Dec-2004  03:58  102,400  Natlib.pdb

   Path: Public\Common\Oak\Lib\Mipsiv\Retail
   29-Dec-2004  03:58   84,304  Autodial.lib
   29-Dec-2004  03:58  110,592  Autodial.pdb
   29-Dec-2004  03:58  487,226  Natlib.lib
   29-Dec-2004  03:58  102,400  Natlib.pdb

   Path: Public\Common\Oak\Lib\Mipsiv_fp\Debug
   29-Dec-2004  03:59  130,208  Autodial.lib
   29-Dec-2004  03:59  110,592  Autodial.pdb
   29-Dec-2004  03:59  711,696  Natlib.lib
   29-Dec-2004  03:59  102,400  Natlib.pdb

   Path: Public\Common\Oak\Lib\Mipsiv_fp\Retail
   29-Dec-2004  03:59   84,316  Autodial.lib
   29-Dec-2004  03:59  110,592  Autodial.pdb
   29-Dec-2004  03:59  487,380  Natlib.lib
   29-Dec-2004  03:59  102,400  Natlib.pdb

   Path: Public\Common\Oak\Lib\Sh4\Debug
   29-Dec-2004  03:54  113,070  Autodial.lib
   29-Dec-2004  03:54  110,592  Autodial.pdb
   29-Dec-2004  03:54  602,612  Natlib.lib
   29-Dec-2004  03:54  102,400  Natlib.pdb

   Path: Public\Common\Oak\Lib\Sh4\Retail
   29-Dec-2004  03:54   77,888  Autodial.lib
   29-Dec-2004  03:54  110,592  Autodial.pdb
   29-Dec-2004  03:54  435,780  Natlib.lib
   29-Dec-2004  03:54  102,400  Natlib.pdb

   Path: Public\Common\Oak\Lib\X86\Debug
   29-Dec-2004  03:53  104,804  Autodial.lib
   29-Dec-2004  03:53  110,592  Autodial.pdb
   29-Dec-2004  03:53  581,778  Natlib.lib
   29-Dec-2004  03:53  102,400  Natlib.pdb

   Path: Public\Common\Oak\Lib\X86\Retail
   29-Dec-2004  03:53   76,610  Autodial.lib
   29-Dec-2004  03:53  110,592  Autodial.pdb
   29-Dec-2004  03:53  447,398  Natlib.lib
   29-Dec-2004  03:53  102,400  Natlib.pdb

STATUS

Microsoft has confirmed that this is a problem in the Microsoft products that are listed in the "Applies to" section.
Modification Type:MinorLast Reviewed:5/27/2005
Keywords:kbBug kbfix kbQFE KB842550 kbAudDeveloper
©2004 Microsoft Corporation. All rights reserved.