Microsoft KB Archive/294321

= INFO: Intermediate NDIS Drivers Not Supported Over WAN =

Article ID: 294321

Article Last Modified on 12/27/2003

-

APPLIES TO


 * Microsoft Windows CE 2.12 for the Handheld PC
 * Microsoft Windows CE 3.0 for the Handheld PC

-



This article was previously published under Q294321



SUMMARY
Windows CE supports intermediate network driver interface specification (NDIS) drivers only for Ethernet (802.3). Intermediate NDIS drivers over wide area networks (WANs) are not supported.



MORE INFORMATION
Intermediate NDIS drivers for WAN are currently not supported. This is because the method for sending packets over a WAN interface in Windows CE is different than the method used in Window 2000. Currently, Microsoft has chosen not to publish this interface, and as a result, it in not possible to write WAN-aware protocols in Windows CE. Additionally, because an intermediate driver is both a protocol driver and a miniport driver, it is not possible to write a WAN intermediate driver either.

A possible workaround for intercepting WAN traffic over a serial link would be to intercept the packets in the serial driver. Source code for serial drivers is available in the Platform Builder Toolkit.

