How do I hook the TCP stack in Windows to sniff and modify packets?

Question

I\'d like to write a packet sniffer and editor for Windows. I want to able to see the contents of all packets entering and leaving my system and possibly modify them. Any lang

Answer 1

I actually did this, several years ago. I'm hazy on the details at this point, but I had to develop a filter/pass-thru/intermediate driver using the Windows DDK. I got a lot of good information from pcausa. Here's a url which points to their product that does this: http://www.pcausa.com/pcasim/Default.htm