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Locating the Packet Distributor (All 2D clients + Pre-Alpha) | JoinUO Forums

Locating the Packet Distributor (All 2D clients + Pre-Alpha)


Site Admin
Posts: 372
Joined: Wed Apr 08, 2009 6:35 am
PostPosted: Mon Feb 21, 2011 1:34 pm
<Derrick> RunUO AI is kind of a functional prototype, which i have hacked into something resembling OSI behavior, but only by complitcating everything

Site Admin
Posts: 455
Joined: Tue Jun 17, 2008 2:33 pm
PostPosted: Mon Feb 21, 2011 5:13 pm
This is brilliant work.
I've tested these scripts with Demo, 5.0.8.3 and God client, works great. Thanks!

Posts: 8
Joined: Sat Jan 15, 2011 3:09 am
PostPosted: Sat Feb 26, 2011 6:36 pm
This is really useful. It is exactly what I've been needing. Thank you!

Posts: 1
Joined: Fri Feb 10, 2012 1:54 pm
PostPosted: Fri Feb 10, 2012 1:56 pm

Posts: 36
Joined: Thu Apr 05, 2012 2:46 am
PostPosted: Sat May 12, 2012 1:12 pm
Here's a trick I found for finding the beginning of the packet handler function.

Just search for:

CMP BYTE PTR DS:[EAX],33
In hex that's : 803833

clients I've seen so far have that instruction and only have it once: near the beginning of the packet handler function.

EDIT: damn, not true for all clients. It's there, but not necessarily next to the main packet handling code. In some clients it's off on it's own in a separate function that gets called before the main packet handler. It's a special handler for packet 0x33...

Also note that in client 7.0.25.0, that location of the 0x33 handler is called from 5 different locations in code and is for handling special packets -before- the main packet handler. Something to keep in mind. This style code is in clients from the 4.x to 7.x range.

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