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

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

Another BSOD on Inserting Packets in LWF

Steve_ValleySteve_Valley Member - All Emails Posts: 6
I have written some very simple code (famous last words) to modify a SYN packet coming down the tcpip stack. I create a new buffer list and store the original in the context space of the new nbl to free in my FilterSendNetBufferListsComplete routine. This seems to work sometimes. I get a blue screen on this call after traffic starts to pick up. I see that if the nbl I created is freed before other nbls queued on my pFilter, then everything works fine. If another nbl is freed before I get mine back. I get a BSOD. Do I need to wait to get my packet back from the FilterSendNetBufferLists call before another call to FilterSendNetBufferLists is made? I am new at this so I apologize for the question if it is stupid or answered before. I have looked through many of the prior posting, and the code in some of those threads is very similar to mine. Thanks.
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!