Windows System Software -- Consulting, Training, Development -- Unique Expertise, Guaranteed Results


More Info on Driver Writing and Debugging

The free OSR Learning Library has more than 50 articles on a wide variety of topics about writing and debugging device drivers and Minifilters. From introductory level to advanced. All the articles have been recently reviewed and updated, and are written using the clear and definitive style you've come to expect from OSR over the years.

Check out The OSR Learning Library at:

Before Posting...

Please check out the Community Guidelines in the Announcements and Administration Category.

WFP: Associating a flowContext at ALE_CONNECT layer

john-7john-7 Member Posts: 24

I am writing a WFP driver to perform deep inspection at the Stream layer.
A context is associated at ALE_CONNECT (Connect layer) using FwpsFlowAssociateContext.
There is a specific need to associate a context in the Connect layer.

However for FlowEstablishedClassify or StreamClassify callouts, WFP passes the flowContext as 0.
Hence I am not able to dereference my context and perform the deep inspection at the stream layer.
Please let me know if there is anything I am missing here.
When the flow gets closed WFP calls AleConnectFlowDeleteFn() with the correct context which wad allocated during AleConnectClassify()


Sign In or Register to comment.

Howdy, Stranger!

It looks like you're new here. If you want to get involved, click one of these buttons!

Upcoming OSR Seminars
OSR has suspended in-person seminars due to the Covid-19 outbreak. But, don't miss your training! Attend via the internet instead!
Developing Minifilters 24 May 2021 Live, Online
Writing WDF Drivers 14 June 2021 Live, Online
Internals & Software Drivers 27 September 2021 Live, Online
Kernel Debugging 15 November 2021 Live, Online