net filter

[assauei]

Hi all,

i am trying to write a c++ net-filter for windows...
on linux i could use libipq and netfilter this way:

"Netfilter provides a mechanism for passing packets
out of the stack for queueing to userspace,
then receiving these packets back into the kernel
with a verdict specifying what to do with the
packets (such as ACCEPT or DROP).
These packets may also be modified in userspace
prior to reinjection back into the kernel."

i am looking for a way to do that on windows: get the packets out of the stack, modify it, an then put it back into the kernel...
which API could i use ? Any help would be appreciated.

Thank you.

 

[xwb]

Could look at WPE for clues. Note that some companies stop you getting to the site that hosts WPE. Also, WPE doesn't work if Norton is switched on.

WPE has 2 modes: one for Winsock and the other for winsock2. It lists the calls you are interested in and you can go from there.

It is basically a packet editor/filter.