Warcraft 3 syncronization packets

[Cap_4a]

Does anyone know how the sync checksum is calculated in W3GS_OUTGOING_KEEPALIVE packet ? This packet is rapidly sent from client to host and if host sees that checksum is wrong it disconnects the client.

 

[Xonok]

Does anyone know how the sync checksum is calculated in W3GS_OUTGOING_KEEPALIVE packet ? This packet is rapidly sent from client to host and if host sees that checksum is wrong it disconnects the client.

I guess different events have a different effect to the checksum, ideally meaning that any tampering will cause a disconnect.

EDIT: I dunno.

 

[Dr Super Good]

I am guessing the host does not calculate it, only the clients do. The Host then disconnects players who have non-matching checksums.

These values are usually produced as a function of synchronous/deterministic game state or as a result of a sequence of events (every change to synchronous/deterministic game state changes it in some way).