This was a session-based packet sniffer I put together in the mid-'90s in response to a series of intrusions on my network. It's from a completely different age, one of repeater-driven thinnet networking (entire subnets' traffic visible to all systems), fully-routable IP addresses to the desktop without firewalling, clear-text inter-site logins via telnet, sendmail used without TLS, pre-SSL HTTP, etc. I also originally used this project as fun exercise in abusing the preprocessor, though most of that abuse has since been excised. :) I consider it a fun little curiosity to tinker with now and then. A pitiful, embryonic effort at rewriting it into C++ exists on a branch. (And, dang, I guess I need to add a formal license to this now that I've uploaded it to Github!)