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Tracing a specific function in a chain of functions

 
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DocVoid
How do I cheat?
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Joined: 03 Apr 2025
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PostPosted: Thu Apr 03, 2025 12:19 pm    Post subject: Tracing a specific function in a chain of functions Reply with quote

Hello you guys,

I am kinda stuck finding the SendPacket function in a very old game. One method I tried was to find out, what writes to the packetBuffer, but this failed. Within mere seconds the list fills with thousand of instructions. It is not distinguishable, which item in the list comes from an actual instruction like MoveTo(X, Y).

Next try: I actually managed to find MoveTo, UseSkill and Travel and successfully call them from an injected DLL. These functions must eventually generate a packet that is sent to the server via the WinSocket Send function. Unfortunately it is not possible for me to find the link between these 3 functions and the PacketSend function. I got stuck for hours in frame drawing routines and such.

I really want to find the SendPacket function ingame because with a breakpoint there it is quite easy to deduct any other function.

Admire my paint skills to illustrate what I mean.

Do you have any other advice for me? It would be greately appreciated.

And there is quite an oddity that interests me from a technical point of view. See, when there is an item on the ground I can put it into focus and give the character the instruction to move to it and pick it up. But when I try to find out what accesses the ItemId or even the pointer to the ItemStruct - nothing triggers when I press the button to go there and pick up the item.

Thank you very much and have a nice evening.



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