Old Engine/JAGGRAB Protocol

JAGGRAB runs on port 43595.

This protocol was used as a fallback when a resource over HTTP was not available (due to a connection timeout or 404). It downloads the necessary BZip2 archives to bootstrap the client. They are stored in main_file_cache.idx0.

The remaining model, animation, midi, and map data is loaded on demand in a separate protocol.

Basics

This protocol is essentially HTTP/0.9, see: https://www.w3.org/Protocols/HTTP/AsImplemented.html

The main difference is the client closes the connection, not the server. If you close the connection from the server the client will trigger an exception.